/* roulang page: index */
:root{
  --brand:#58C4DD;
  --brand-dark:#3FA9C4;
  --bg:#0C1116;
  --surface:#131A22;
  --accent:#F5A524;
  --text:#E8EEF2;
  --text-2:#8A9AA7;
  --text-disabled:rgba(255,255,255,.35);
  --border:rgba(255,255,255,.08);
  --success:#34D399;
  --danger:#F87171;
  --radius-card:16px;
  --radius-btn:12px;
  --shadow-card:0 4px 24px rgba(0,0,0,.3);
  --shadow-hover:0 0 0 1px rgba(88,196,221,.3), 0 8px 32px rgba(0,0,0,.4);
  --font-sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-num:'Inter',Arial,sans-serif;
  --container:1200px;
  --space:96px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  background:var(--bg);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  background-image:radial-gradient(ellipse at 50% 0%,rgba(88,196,221,.06) 0%,transparent 60%),url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(/%23n)' opacity='.03'/%3E%3C/svg%3E");
  overscroll-behavior-y:none;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul,ol{list-style:none}
input,textarea{font-family:inherit}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.section-pad{padding:var(--space) 0}
.section-head{margin-bottom:40px}
.section-tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;letter-spacing:.12em;color:var(--brand);
  background:rgba(88,196,221,.1);border:1px solid rgba(88,196,221,.2);
  padding:4px 14px;border-radius:999px;margin-bottom:14px;font-weight:600;
}
.section-head h2{font-size:36px;line-height:1.25;font-weight:700;letter-spacing:-.01em}
.section-head p{color:var(--text-2);margin-top:10px;font-size:16px}
h1,h2,h3,h4{line-height:1.25;letter-spacing:-.01em}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 28px;border-radius:var(--radius-btn);
  transition:all .2s ease-out;white-space:nowrap;border:1px solid transparent;
}
.btn:focus-visible{outline:3px solid rgba(88,196,221,.4);outline-offset:2px}
.btn-accent{
  background:var(--accent);color:#101418;
  box-shadow:0 4px 20px rgba(245,165,36,.22);
}
.btn-accent:hover{
  background:#FFB547;transform:translateY(-2px);
  box-shadow:0 8px 28px rgba(245,165,36,.32);
}
.btn-accent:active{transform:translateY(0)}
.btn-outline{
  border-color:rgba(255,255,255,.18);color:var(--text);background:rgba(255,255,255,.02);
}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-outline:active{transform:translateY(0)}
.btn-lg{height:52px;padding:0 36px;font-size:16px}

.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  height:72px;
  background:rgba(12,17,22,.92);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;
  transition:background .3s,border-color .3s,box-shadow .3s;
}
.site-header.scrolled{
  background:rgba(12,17,22,.96);
  border-bottom-color:var(--border);
  box-shadow:0 4px 20px rgba(0,0,0,.3);
}
.nav-inner{max-width:var(--container);margin:0 auto;height:72px;display:flex;align-items:center;padding:0 24px;position:relative}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-icon{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#0C1116;flex-shrink:0}
.logo-icon svg{width:22px;height:22px}
.logo-text{display:flex;flex-direction:column;line-height:1.1}
.logo-text strong{font-size:17px;font-weight:800;letter-spacing:-.01em;white-space:nowrap}
.logo-text span{font-size:11px;color:var(--text-2);letter-spacing:.1em}
.main-nav{margin-left:48px;display:flex;gap:4px;flex:1}
.main-nav a{
  position:relative;padding:8px 14px;font-size:14px;color:var(--text-2);
  border-radius:8px;transition:color .2s,background .2s;white-space:nowrap;font-weight:500;
}
.main-nav a:hover{color:var(--text);background:rgba(255,255,255,.04)}
.main-nav a.active{color:var(--text)}
.main-nav a.active::after{
  content:'';position:absolute;left:14px;right:14px;bottom:0;height:2px;
  background:var(--brand);border-radius:2px;
}
.nav-cta{margin-left:auto}
.hamburger{display:none;margin-left:auto;width:42px;height:42px;align-items:center;justify-content:center;border-radius:10px;border:1px solid var(--border);background:rgba(255,255,255,.03)}
.hamburger svg{width:20px;height:20px;stroke:var(--text)}

.hero{
  min-height:100vh;display:flex;align-items:center;position:relative;
  padding:120px 0 80px;overflow:hidden;
  background:linear-gradient(180deg,rgba(12,17,22,.82) 0%,rgba(12,17,22,.92) 100%),url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
}
.hero::before{
  content:'';position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:900px;height:900px;border-radius:50%;
  background:radial-gradient(circle,rgba(88,196,221,.12) 0%,transparent 65%);
  pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;position:relative;z-index:2}
.hero-chip{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand);
  border:1px solid rgba(88,196,221,.25);background:rgba(88,196,221,.08);
  padding:6px 16px;border-radius:999px;margin-bottom:20px;
}
.hero-chip .dot{width:6px;height:6px;border-radius:50%;background:var(--success);box-shadow:0 0 8px rgba(52,211,153,.8)}
.hero h1{font-size:56px;font-weight:800;line-height:1.16;letter-spacing:-.02em;margin-bottom:18px}
.hero h1 .line{display:block}
.hero-sub{font-size:18px;color:var(--text-2);max-width:480px;line-height:1.7;margin-bottom:32px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:36px}
.hero-points{display:flex;flex-wrap:wrap;gap:10px}
.hero-points li{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--text-2);
  background:rgba(255,255,255,.04);border:1px solid var(--border);border-radius:999px;padding:5px 12px;
}
.hero-points li::before{content:'✓';color:var(--success);font-weight:700}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;height:auto;border-radius:24px;box-shadow:0 24px 64px rgba(0,0,0,.45);
  border:1px solid var(--border);
}
.hero-visual::after{
  content:'';position:absolute;inset:0;border-radius:24px;
  background:linear-gradient(140deg,rgba(88,196,221,.14) 0%,transparent 50%,rgba(245,165,36,.1) 100%);
  pointer-events:none;
}
.hero-float-card{
  position:absolute;left:-20px;bottom:36px;background:rgba(19,26,34,.94);
  border:1px solid rgba(88,196,221,.35);border-radius:14px;padding:12px 18px;
  display:flex;align-items:center;gap:10px;box-shadow:0 12px 32px rgba(0,0,0,.4);
  backdrop-filter:blur(6px);animation:float 3s ease-in-out infinite;
}
.hero-float-card .ico{width:30px;height:30px;border-radius:8px;background:rgba(88,196,221,.15);display:flex;align-items:center;justify-content:center;color:var(--brand)}
.hero-float-card strong{font-size:13px;display:block;line-height:1.2}
.hero-float-card span{font-size:11px;color:var(--text-2)}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.scroll-line{
  position:absolute;bottom:0;left:50%;transform:translateX(-50%);
  width:1px;height:40px;background:linear-gradient(180deg,var(--brand),transparent);
  z-index:2;animation:scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse{0%,100%{opacity:.3}50%{opacity:1}}

.stats{
  border-bottom:1px solid var(--border);position:relative;
  background:rgba(19,26,34,.5);
}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:48px 0}
.stat-item{text-align:center;position:relative;padding:8px}
.stat-item + .stat-item::before{
  content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:1px;height:48px;background:var(--border);
}
.stat-num{
  font-family:var(--font-num);font-size:44px;font-weight:800;color:var(--accent);
  line-height:1.1;letter-spacing:-.02em;
}
.stat-label{font-size:13px;color:var(--text-2);margin-top:8px}

.hot-grid{background:linear-gradient(180deg,transparent,rgba(19,26,34,.4),transparent)}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.play-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  overflow:hidden;display:flex;flex-direction:column;height:100%;
  transition:transform .2s,box-shadow .2s,border-color .2s;
  position:relative;
}
.play-card:hover{
  transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(88,196,221,.25);
}
.play-card-cover{height:200px;position:relative;overflow:hidden}
.play-card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.play-card:hover .play-card-cover img{transform:scale(1.03)}
.play-card-badge{
  position:absolute;top:12px;left:12px;z-index:2;
  background:rgba(12,17,22,.9);color:var(--brand);font-size:11px;font-weight:600;
  border:1px solid rgba(88,196,221,.3);border-radius:999px;padding:4px 12px;
  backdrop-filter:blur(4px);
}
.play-card-body{padding:20px;display:flex;flex-direction:column;flex:1}
.play-card-body h3{font-size:17px;font-weight:700;line-height:1.4;margin-bottom:8px}
.play-card-body p{font-size:13px;color:var(--text-2);line-height:1.7;flex:1}
.play-card-foot{display:flex;align-items:center;justify-content:space-between;margin-top:16px;padding-top:14px;border-top:1px solid var(--border)}
.stars{display:flex;gap:2px;color:var(--accent)}
.stars svg{width:15px;height:15px;fill:currentColor}
.card-arrow{
  width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--border);color:var(--text-2);transition:all .2s;
}
.play-card:hover .card-arrow{background:var(--brand);border-color:var(--brand);color:#0C1116}

.testimonials{background:rgba(19,26,34,.4);border-top:1px solid var(--border);border-bottom:1px solid var(--border);overflow:hidden}
.testi-track-wrap{position:relative}
.testi-track{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  scrollbar-width:none;padding:4px;
}
.testi-track::-webkit-scrollbar{display:none}
.testi-card{
  flex:0 0 calc(33.333% - 16px);min-width:280px;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:28px;scroll-snap-align:start;
  position:relative;transition:border-color .2s,box-shadow .2s;
}
.testi-card:hover{border-color:rgba(88,196,221,.2);box-shadow:var(--shadow-hover)}
.testi-card::before{
  content:'"';position:absolute;top:20px;right:24px;font-size:72px;line-height:1;
  color:rgba(88,196,221,.12);font-family:Georgia,serif;
}
.testi-top{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.testi-avatar{
  width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,rgba(88,196,221,.25),rgba(245,165,36,.2));
  display:flex;align-items:center;justify-content:center;font-weight:700;color:var(--brand);
  border:1px solid rgba(88,196,221,.3);flex-shrink:0;font-size:16px;
}
.testi-stars{display:flex;gap:2px;color:var(--accent);margin-bottom:12px}
.testi-stars svg{width:14px;height:14px;fill:currentColor}
.testi-text{font-size:14px;color:var(--text);line-height:1.75;margin-bottom:16px}
.testi-user{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--border);padding-top:14px}
.testi-name{font-size:14px;font-weight:700}
.testi-src{font-size:11px;color:var(--text-2);background:rgba(255,255,255,.05);border-radius:999px;padding:3px 10px}
.testi-nav{display:flex;align-items:center;justify-content:center;gap:16px;margin-top:28px}
.testi-btn{
  width:42px;height:42px;border-radius:50%;border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;color:var(--text-2);
  transition:all .2s;background:rgba(255,255,255,.03);
}
.testi-btn:hover{color:var(--brand);border-color:var(--brand)}
.testi-dots{display:flex;gap:8px}
.testi-dot{width:8px;height:8px;border-radius:999px;background:rgba(255,255,255,.15);transition:all .2s}
.testi-dot.active{width:24px;background:var(--brand)}

.guarantee{}
.guarantee-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.guard-item{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:28px 24px;display:flex;flex-direction:column;gap:10px;height:100%;
  transition:border-color .2s,transform .2s;
}
.guard-item:hover{border-color:rgba(88,196,221,.25);transform:translateY(-2px)}
.guard-icon{width:42px;height:42px;border-radius:12px;background:rgba(88,196,221,.1);display:flex;align-items:center;justify-content:center;color:var(--brand);margin-bottom:6px}
.guard-icon svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.guard-title{font-size:17px;font-weight:700}
.guard-desc{font-size:13px;color:var(--text-2);line-height:1.6}

.news{position:relative}
.news-list{display:flex;flex-direction:column;gap:16px}
.news-item{
  display:flex;align-items:center;gap:24px;
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-card);
  padding:22px 24px;transition:border-color .2s,box-shadow .2s,transform .2s;
}
.news-item:hover{border-left:2px solid var(--brand);box-shadow:var(--shadow-hover);transform:translateX(2px)}
.news-badge{
  flex-shrink:0;background:rgba(88,196,221,.1);color:var(--brand);
  border:1px solid rgba(88,196,221,.2);border-radius:999px;font-size:12px;
  padding:4px 12px;font-weight:600;
}
.news-body{flex:1;min-width:0}
.news-body h3{font-size:17px;font-weight:700;margin-bottom:4px;transition:color .2s}
.news-item:hover .news-body h3{color:var(--brand)}
.news-body p{font-size:13px;color:var(--text-2);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;align-items:center;gap:20px;flex-shrink:0}
.news-time{font-size:12px;color:var(--text-2);font-family:var(--font-num);display:flex;align-items:center;gap:6px}
.news-time svg{width:14px;height:14px}
.news-more{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--brand);
}
.news-more svg{width:15px;height:15px;transition:transform .2s}
.news-item:hover .news-more svg{transform:translateX(4px)}
.news-empty{
  text-align:center;padding:60px 20px;color:var(--text-2);
  background:var(--surface);border:1px dashed rgba(255,255,255,.12);border-radius:var(--radius-card);
}

.faq{}
.faq-list{max-width:860px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--border)}
.faq-item:first-child{border-top:1px solid var(--border)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 4px;font-size:16px;font-weight:600;color:var(--text);
  text-align:left;transition:color .2s;
}
.faq-q:hover{color:var(--brand)}
.faq-icon{
  width:32px;height:32px;border-radius:50%;border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
  transition:transform .3s,border-color .3s;position:relative;
}
.faq-icon::before,.faq-icon::after{
  content:'';position:absolute;background:var(--text-2);transition:all .3s;
}
.faq-icon::before{width:12px;height:1.5px}
.faq-icon::after{width:1.5px;height:12px}
.faq-item.open .faq-icon{transform:rotate(45deg);border-color:var(--accent)}
.faq-item.open .faq-icon::before,.faq-item.open .faq-icon::after{background:var(--accent)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;padding:0 4px}
.faq-a-inner{padding-bottom:20px;font-size:14px;color:var(--text-2);line-height:1.75}

.cta{
  position:relative;padding:80px 0;overflow:hidden;
  background:linear-gradient(180deg,rgba(12,17,22,.92) 0%,rgba(12,17,22,.97) 100%),url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-top:1px solid var(--border);border-bottom:1px solid var(--border);
}
.cta::before{
  content:'';position:absolute;left:50%;top:50%;width:640px;height:640px;transform:translate(-50%,-50%);
  background:radial-gradient(circle,rgba(88,196,221,.1) 0%,transparent 70%);
  pointer-events:none;
}
.cta-inner{text-align:center;position:relative;z-index:2}
.cta-inner h2{font-size:40px;font-weight:800;letter-spacing:-.02em;margin-bottom:14px}
.cta-inner p{font-size:16px;color:var(--text-2);margin-bottom:32px}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

.footer{background:#090E13;border-top:1px solid var(--border);padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;margin-bottom:48px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:13px;color:var(--text-2);line-height:1.7;max-width:280px}
.footer-col h4{font-size:14px;font-weight:700;margin-bottom:16px;letter-spacing:.05em}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col ul a{font-size:13px;color:var(--text-2);transition:color .2s;display:inline-flex;align-items:center;gap:8px}
.footer-col ul a::before{content:'›';color:var(--brand);font-size:15px;line-height:1}
.footer-col ul a:hover{color:var(--text)}
.footer-contact{display:flex;flex-direction:column;gap:10px;font-size:13px;color:var(--text-2)}
.footer-contact .contact-row{display:flex;align-items:center;gap:10px}
.footer-contact svg{width:16px;height:16px;color:var(--brand);flex-shrink:0}
.footer-bottom{
  border-top:1px solid var(--border);padding-top:24px;
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;
  font-size:12px;color:var(--text-disabled);
}
.footer-bottom-links{display:flex;gap:20px}
.footer-bottom-links a{color:var(--text-2);transition:color .2s}
.footer-bottom-links a:hover{color:var(--text)}

.mobile-tab{
  display:none;position:fixed;bottom:0;left:0;right:0;z-index:999;
  height:56px;background:rgba(9,14,19,.97);backdrop-filter:blur(14px);
  border-top:1px solid var(--border);
}
.tab-item{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:3px;color:var(--text-2);font-size:10px;position:relative;transition:color .2s;
}
.tab-item svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.tab-item::before{
  content:'';position:absolute;top:4px;left:50%;transform:translateX(-50%);width:4px;height:4px;border-radius:50%;
  background:var(--accent);opacity:0;transition:opacity .2s;
}
.tab-item.active{color:var(--accent)}
.tab-item.active::before{opacity:1}
.tab-open-panel{
  position:fixed;bottom:56px;left:0;right:0;z-index:998;
  background:rgba(9,14,19,.98);border-top:1px solid var(--border);
  padding:20px;display:none;transform:translateY(100%);transition:transform .3s ease;
  border-radius:16px 16px 0 0;
}
.tab-open-panel.show{transform:translateY(0)}
.tab-open-panel a{
  display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:10px;
  color:var(--text);font-size:14px;font-weight:500;
}
.tab-open-panel a:hover{background:rgba(255,255,255,.05)}

.drawer{
  position:fixed;top:0;right:0;bottom:0;width:300px;max-width:85vw;z-index:1200;
  background:var(--surface);border-left:1px solid var(--border);
  padding:80px 20px 24px;transform:translateX(100%);transition:transform .3s ease;
  overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:1199;opacity:0;visibility:hidden;transition:all .3s}
.drawer-overlay.open{opacity:1;visibility:visible}
.drawer-close{position:absolute;top:16px;right:16px;width:40px;height:40px;border-radius:10px;border:1px solid var(--border);display:flex;align-items:center;justify-content:center}
.drawer-close svg{width:18px;height:18px}
.drawer .drawer-nav{display:flex;flex-direction:column;gap:4px}
.drawer .drawer-nav a{padding:12px 14px;border-radius:10px;font-size:15px;color:var(--text-2);display:flex;align-items:center;gap:10px}
.drawer .drawer-nav a:hover{background:rgba(255,255,255,.05);color:var(--text)}
.drawer .drawer-nav a .drawer-dot{width:6px;height:6px;border-radius:50%;background:var(--brand)}
.drawer .drawer-cta{margin-top:24px}

@media (max-width:1023px){
  .grid-4{grid-template-columns:repeat(2,1fr);gap:20px}
  .guarantee-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:32px 16px}
  .stat-item + .stat-item::before{display:none}
  .testi-card{flex:0 0 calc(50% - 12px)}
  .hero h1{font-size:44px}
  .cta-inner h2{font-size:32px}
}
@media (max-width:767px){
  :root{--space:64px}
  .container{padding:0 16px}
  .section-head h2{font-size:28px}
  .site-header{height:56px}
  .nav-inner{height:56px;padding:0 16px}
  .main-nav{display:none}
  .nav-cta{display:none}
  .hamburger{display:flex}
  .mobile-tab{display:flex}
  body{padding-bottom:56px}
  .hero{min-height:60vh;padding:100px 0 60px}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero h1{font-size:34px}
  .hero-sub{font-size:16px}
  .hero-float-card{display:none}
  .scroll-line{display:none}
  .grid-4{grid-template-columns:1fr}
  .guarantee-grid{grid-template-columns:1fr 1fr}
  .testi-card{flex:0 0 100%;min-width:260px}
  .news-item{flex-direction:column;align-items:flex-start;gap:12px;padding:18px}
  .news-meta{width:100%;justify-content:space-between}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;text-align:center}
  .cta{padding:56px 0}
  .cta-inner h2{font-size:28px}
  .btn-lg{height:48px;padding:0 28px}
  .drawer{padding-top:70px}
  .stats-grid{padding:32px 0}
  .stat-num{font-size:32px}
}
@media (max-width:520px){
  .hero h1{font-size:29px}
  .hero-actions .btn{width:100%}
  .guarantee-grid{grid-template-columns:1fr}
  .play-card-cover{height:160px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}

/* roulang page: category1 */
:root {
            --brand: #58C4DD;
            --brand-dark: #3FA9C4;
            --accent: #F5A524;
            --accent-dark: #d98e1c;
            --bg: #0C1116;
            --surface: #131A22;
            --surface-light: #1A2330;
            --text: #E8EEF2;
            --text-secondary: #8A9AA7;
            --text-disabled: rgba(255, 255, 255, 0.35);
            --border: rgba(255, 255, 255, 0.08);
            --border-brand: rgba(88, 196, 221, 0.3);
            --success: #34D399;
            --danger: #F87171;
            --radius: 16px;
            --radius-btn: 12px;
            --radius-badge: 999px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 0 0 1px rgba(88, 196, 221, 0.3), 0 8px 32px rgba(0, 0, 0, 0.4);
            --nav-height: 72px;
            --container: 1200px;
            --section-space: 96px;
            --transition: 200ms ease-out;
            --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-num: "Inter", Arial, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background: var(--bg);
            overflow-x: hidden;
        }

        body::before {
            content: "";
            position: fixed;
            inset: 0;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120' viewBox='0 0 120 120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(/%23n)' opacity='0.06'/%3E%3C/svg%3E");
            pointer-events: none;
            z-index: 0;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: var(--brand);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--brand-dark);
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        /* ========== Button ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 46px;
            padding: 0 28px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            line-height: 1;
            transition: background var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .btn-accent {
            background: var(--accent);
            color: #0C1116;
        }

        .btn-accent:hover {
            background: var(--accent-dark);
            color: #0C1116;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 165, 36, 0.25);
        }

        .btn-outline {
            border-color: rgba(255, 255, 255, 0.28);
            color: var(--text);
            background: transparent;
        }

        .btn-outline:hover {
            border-color: var(--brand);
            color: var(--brand);
            transform: translateY(-2px);
        }

        .btn-large {
            height: 52px;
            padding: 0 36px;
            font-size: 17px;
        }

        .btn:focus-visible {
            outline: 2px solid var(--brand);
            outline-offset: 3px;
        }

        /* ========== Header / Nav ========== */
        .main-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--nav-height);
            background: rgba(12, 17, 22, 0.95);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            z-index: 100;
            transition: background var(--transition), border-color var(--transition);
        }

        .main-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: radial-gradient(circle at 30% 30%, rgba(88, 196, 221, 0.2), transparent 70%);
            border: 1px solid var(--border-brand);
            border-radius: 10px;
            color: var(--brand);
        }

        .logo-icon svg {
            width: 22px;
            height: 22px;
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.15;
        }

        .logo-text strong {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.01em;
        }

        .logo-text span {
            font-size: 11px;
            color: var(--text-secondary);
            letter-spacing: 0.06em;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .main-nav a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            padding: 4px 0;
            transition: color var(--transition);
        }

        .main-nav a:hover {
            color: var(--text);
        }

        .main-nav a.active {
            color: var(--brand);
        }

        .main-nav a.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -6px;
            height: 2px;
            background: var(--brand);
            border-radius: 2px;
        }

        .nav-cta {
            height: 40px;
            padding: 0 20px;
            font-size: 14px;
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            border: 1px solid var(--border);
            color: var(--text);
            background: var(--surface);
            transition: border-color var(--transition), color var(--transition);
        }

        .nav-toggle:hover {
            border-color: var(--brand);
            color: var(--brand);
        }

        .nav-toggle svg {
            width: 22px;
            height: 22px;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            background: rgba(12, 17, 22, 0.98);
            border-bottom: 1px solid var(--border);
            padding: 16px 24px 24px;
            z-index: 99;
            flex-direction: column;
            gap: 6px;
            opacity: 0;
            transform: translateY(-8px);
            transition: opacity var(--transition), transform var(--transition);
            pointer-events: none;
        }

        .mobile-menu.open {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }

        .mobile-menu a {
            font-size: 16px;
            color: var(--text-secondary);
            padding: 12px 8px;
            border-radius: 10px;
            transition: background var(--transition), color var(--transition);
        }

        .mobile-menu a:hover {
            background: var(--surface);
            color: var(--text);
        }

        .mobile-menu a.active {
            color: var(--brand);
            background: rgba(88, 196, 221, 0.08);
        }

        /* ========== Mobile Tab Bar ========== */
        .tab-bar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 62px;
            background: rgba(12, 17, 22, 0.97);
            backdrop-filter: blur(14px);
            border-top: 1px solid var(--border);
            z-index: 100;
            align-items: center;
            justify-content: space-around;
            padding: 0 8px;
        }

        .tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            color: var(--text-secondary);
            font-size: 11px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 12px;
            position: relative;
            transition: color var(--transition);
        }

        .tab-item svg {
            width: 20px;
            height: 20px;
            transition: color var(--transition);
        }

        .tab-item.active {
            color: var(--accent);
        }

        .tab-item.active::before {
            content: "";
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--accent);
        }

        .tab-category-wrap {
            position: relative;
        }

        .tab-category-dropdown {
            position: absolute;
            bottom: 62px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 10px;
            min-width: 140px;
            box-shadow: var(--shadow-card);
            display: none;
            flex-direction: column;
            gap: 4px;
        }

        .tab-category-wrap:hover .tab-category-dropdown {
            display: flex;
        }

        .tab-category-dropdown a {
            color: var(--text-secondary);
            font-size: 13px;
            padding: 8px 14px;
            border-radius: 8px;
            transition: background var(--transition), color var(--transition);
        }

        .tab-category-dropdown a:hover {
            background: rgba(88, 196, 221, 0.08);
            color: var(--brand);
        }

        /* ========== Page Hero ========== */
        .page-hero {
            position: relative;
            padding: 148px 0 72px;
            background: linear-gradient(180deg, rgba(12, 17, 22, 0.95), rgba(12, 17, 22, 0.88)), url('/assets/images/backpic/back-1.webp') center/cover;
            border-bottom: 1px solid var(--border);
        }

        .page-hero::after {
            content: "";
            position: absolute;
            top: 20%;
            left: 30%;
            width: 600px;
            height: 400px;
            background: radial-gradient(circle, rgba(88, 196, 221, 0.08), transparent 70%);
            pointer-events: none;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--text-secondary);
            margin-bottom: 28px;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--brand);
        }

        .breadcrumb-sep {
            opacity: 0.5;
        }

        .page-hero h1 {
            font-size: 48px;
            line-height: 1.2;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text);
            max-width: 640px;
            margin-bottom: 18px;
        }

        .page-hero-sub {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 520px;
            line-height: 1.7;
        }

        /* ========== Section Base ========== */
        section {
            position: relative;
            z-index: 1;
        }

        .section-head {
            margin-bottom: 48px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--text);
            margin-bottom: 12px;
        }

        .section-head p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 560px;
        }

        /* ========== Split Section ========== */
        .split-section {
            padding: var(--section-space) 0;
        }

        .split-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

        .split-media {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
        }

        .split-media::before {
            content: "";
            display: block;
            padding-top: 72%;
        }

        .split-media img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 400ms ease;
        }

        .split-media:hover img {
            transform: scale(1.03);
        }

        .split-content h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 22px;
            letter-spacing: -0.01em;
        }

        .split-content p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 18px;
        }

        .check-list {
            margin-top: 26px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--text);
            line-height: 1.6;
        }

        .check-list li::before {
            content: "";
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: rgba(88, 196, 221, 0.12);
            border: 1px solid var(--border-brand);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            margin-top: 2px;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2358C4DD' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
            background-size: 12px;
            background-position: center;
            background-repeat: no-repeat;
        }

        /* ========== Steps ========== */
        .steps-section {
            padding: 0 0 var(--section-space);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .step-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px 28px;
            position: relative;
            transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
        }

        .step-card:hover {
            border-color: var(--border-brand);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .step-num {
            font-family: var(--font-num);
            font-size: 42px;
            font-weight: 700;
            color: rgba(88, 196, 221, 0.22);
            line-height: 1;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
        }

        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ========== Related Links ========== */
        .related-links {
            padding: var(--section-space) 0;
            background: rgba(255, 255, 255, 0.02);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            display: flex;
            flex-direction: column;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 28px 28px;
            transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
        }

        .related-card:hover {
            border-color: var(--border-brand);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .related-icon {
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: rgba(88, 196, 221, 0.08);
            border: 1px solid var(--border-brand);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand);
            margin-bottom: 20px;
        }

        .related-icon svg {
            width: 22px;
            height: 22px;
        }

        .related-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .related-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 18px;
        }

        .related-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--brand);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }

        .related-card:hover .related-link {
            gap: 10px;
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: var(--section-space) 0;
        }

        .faq-list {
            max-width: 820px;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
        }

        .faq-item:first-child {
            border-top: 1px solid var(--border);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            min-height: 56px;
            padding: 16px 0;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            transition: color var(--transition);
        }

        .faq-question:hover {
            color: var(--brand);
        }

        .faq-icon {
            width: 26px;
            height: 26px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 400;
            color: var(--text-secondary);
            flex-shrink: 0;
            transition: transform var(--transition), border-color var(--transition), color var(--transition);
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            border-color: var(--brand);
            color: var(--brand);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition);
        }

        .faq-answer p {
            padding: 0 0 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(12, 17, 22, 0.97), rgba(12, 17, 22, 0.92)), url('/assets/images/backpic/back-2.webp') center/cover;
            border-top: 1px solid var(--border);
            text-align: center;
        }

        .cta-section h2 {
            font-size: 36px;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text);
            margin-bottom: 14px;
        }

        .cta-section p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 32px;
        }

        /* ========== Footer ========== */
        .footer {
            background: #090E13;
            border-top: 1px solid var(--border);
            padding: 72px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-top: 16px;
            max-width: 300px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 20px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-col ul a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .footer-col ul a:hover {
            color: var(--brand);
        }

        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .contact-row {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .contact-row svg {
            width: 18px;
            height: 18px;
            color: var(--brand);
            flex-shrink: 0;
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 24px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-bottom span {
            font-size: 13px;
            color: var(--text-disabled);
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 24px;
        }

        .footer-bottom-links a {
            font-size: 13px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }

        .footer-bottom-links a:hover {
            color: var(--brand);
        }

        /* ========== Focus States ========== */
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--brand);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1023px) {
            .main-nav {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .mobile-menu {
                display: flex;
            }

            .split-grid {
                gap: 40px;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 767px) {
            .container {
                padding: 0 16px;
            }

            :root {
                --section-space: 64px;
                --nav-height: 56px;
            }

            .main-header .nav-cta {
                display: none;
            }

            .logo-text strong {
                font-size: 16px;
            }

            .logo-icon {
                width: 32px;
                height: 32px;
            }

            .logo-icon svg {
                width: 18px;
                height: 18px;
            }

            .tab-bar {
                display: flex;
            }

            .page-hero {
                padding: 120px 0 48px;
            }

            .page-hero h1 {
                font-size: 32px;
            }

            .page-hero-sub {
                font-size: 15px;
            }

            .split-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .split-content h2 {
                font-size: 24px;
            }

            .steps-grid {
                grid-template-columns: 1fr;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .faq-question {
                font-size: 15px;
            }

            .cta-section h2 {
                font-size: 28px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-bottom {
                flex-direction: column;
                justify-content: center;
                text-align: center;
            }

            .footer-bottom-links {
                gap: 16px;
                flex-wrap: wrap;
                justify-content: center;
            }

            body {
                padding-bottom: 62px;
            }
        }

        @media (min-width: 768px) and (max-width: 1023px) {
            .split-content h2 {
                font-size: 24px;
            }

            .step-card {
                padding: 28px 20px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
        }

/* roulang page: article */
:root {
            --color-bg: #0C1116;
            --color-surface: #131A22;
            --color-surface-alt: #0E151C;
            --color-brand: #58C4DD;
            --color-brand-dark: #3FA9C4;
            --color-accent: #F5A524;
            --color-text: #E8EEF2;
            --color-text-secondary: #8A9AA7;
            --color-text-disabled: rgba(255, 255, 255, 0.35);
            --color-border: rgba(255, 255, 255, 0.08);
            --color-success: #34D399;
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-badge: 999px;
            --radius-input: 12px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 0 0 1px rgba(88, 196, 221, 0.3), 0 8px 32px rgba(0, 0, 0, 0.4);
            --font-main: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-num: 'Inter', 'Arial', sans-serif;
            --spacing-section: 96px;
            --container-max: 1200px;
            --header-height: 72px;
            --mobile-tab-height: 56px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-main);
            background-color: var(--color-bg);
            color: var(--color-text);
            font-size: 16px;
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(/%23n)' opacity='0.35'/%3E%3C/svg%3E");
            opacity: 0.025;
            pointer-events: none;
            z-index: 0;
        }
        a {
            color: var(--color-brand);
            text-decoration: none;
            transition: color .2s ease-out;
        }
        a:hover {
            color: var(--color-brand-dark);
        }
        img {
            max-width: 100%;
            display: block;
            border-radius: var(--radius-card);
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 100;
            background: rgba(12, 17, 22, 0.95);
            border-bottom: 1px solid var(--color-border);
            transition: background .3s ease, box-shadow .3s ease;
            height: var(--header-height);
        }
        .site-header.scrolled {
            background: rgba(12, 17, 22, 0.98);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: var(--header-height);
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--color-text);
            flex-shrink: 0;
        }
        .logo:hover {
            color: var(--color-text);
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(88, 196, 221, 0.2), rgba(88, 196, 221, 0.05));
            border: 1px solid rgba(88, 196, 221, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-brand);
        }
        .logo-icon svg {
            width: 20px;
            height: 20px;
        }
        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }
        .logo-text strong {
            font-size: 17px;
            font-weight: 700;
            letter-spacing: -0.01em;
        }
        .logo-text span {
            font-size: 12px;
            color: var(--color-text-secondary);
            letter-spacing: 0.08em;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }
        .main-nav a {
            color: var(--color-text-secondary);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 14px;
            border-radius: var(--radius-btn);
            position: relative;
            transition: color .2s ease, background .2s ease;
        }
        .main-nav a:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.04);
        }
        .main-nav a.active {
            color: var(--color-brand);
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: var(--color-brand);
        }
        .header-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--color-accent);
            color: #0C1116;
            font-size: 14px;
            font-weight: 700;
            height: 40px;
            padding: 0 20px;
            border-radius: var(--radius-btn);
            transition: transform .2s ease-out, box-shadow .2s ease-out, background .2s ease-out;
            flex-shrink: 0;
            border: none;
            cursor: pointer;
        }
        .header-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 165, 36, 0.25);
            background: #FFB631;
            color: #0C1116;
        }
        .header-cta:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(245, 165, 36, 0.2);
        }
        .header-cta:focus-visible,
        .main-nav a:focus-visible,
        .logo:focus-visible,
        .mb-item:focus-visible {
            outline: 2px solid var(--color-brand);
            outline-offset: 2px;
        }
        .mobile-bottom-nav {
            display: none;
        }
        .mb-popover {
            display: none;
        }
        .article-page {
            padding-top: var(--header-height);
            position: relative;
            z-index: 1;
            background: radial-gradient(ellipse 60% 40% at 50% -10%, rgba(88, 196, 221, 0.08), transparent 70%);
        }
        .breadcrumb {
            padding: 28px 0 12px;
            font-size: 13px;
            color: var(--color-text-secondary);
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }
        .breadcrumb a {
            color: var(--color-text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--color-brand);
        }
        .breadcrumb .sep {
            color: var(--color-text-disabled);
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--color-text-secondary);
            max-width: 280px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .article-header {
            padding: 40px 0 32px;
            max-width: 860px;
            margin: 0 auto;
            text-align: center;
        }
        .article-header h1 {
            font-size: 42px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.01em;
            color: var(--color-text);
            margin-bottom: 20px;
            word-break: break-word;
        }
        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--color-text-secondary);
        }
        .article-meta .badge {
            display: inline-flex;
            align-items: center;
            background: rgba(88, 196, 221, 0.12);
            color: var(--color-brand);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: var(--radius-badge);
            border: 1px solid rgba(88, 196, 221, 0.25);
        }
        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
        }
        .meta-item svg {
            width: 15px;
            height: 15px;
            stroke: var(--color-text-secondary);
        }
        .article-layout {
            max-width: 860px;
            margin: 0 auto;
            padding-bottom: 24px;
        }
        .article-content {
            max-width: 760px;
            margin: 0 auto;
            font-size: 16px;
            line-height: 1.9;
            color: var(--color-text);
        }
        .article-content h2 {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.4;
            margin: 48px 0 16px;
            padding-top: 16px;
            border-top: 1px solid var(--color-border);
            color: var(--color-text);
        }
        .article-content h3 {
            font-size: 19px;
            font-weight: 600;
            line-height: 1.5;
            margin: 36px 0 12px;
            color: var(--color-text);
        }
        .article-content p {
            margin-bottom: 20px;
        }
        .article-content strong {
            color: #fff;
            font-weight: 600;
        }
        .article-content em {
            color: var(--color-brand);
            font-style: normal;
        }
        .article-content blockquote {
            border-left: 3px solid var(--color-brand);
            background: rgba(88, 196, 221, 0.06);
            padding: 16px 20px;
            margin: 24px 0;
            border-radius: 0 var(--radius-card) var(--radius-card) 0;
            color: var(--color-text-secondary);
            font-size: 15px;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }
        .article-content ul li,
        .article-content ol li {
            margin-bottom: 10px;
        }
        .article-content ul li::marker {
            color: var(--color-brand);
        }
        .article-content img {
            border-radius: var(--radius-card);
            margin: 24px auto;
            box-shadow: var(--shadow-card);
        }
        .article-content figure {
            margin: 28px 0;
        }
        .article-content figcaption {
            font-size: 13px;
            color: var(--color-text-secondary);
            text-align: center;
            margin-top: 10px;
        }
        .article-content a {
            color: var(--color-brand);
            border-bottom: 1px solid rgba(88, 196, 221, 0.3);
        }
        .article-content a:hover {
            color: var(--color-brand-dark);
            border-bottom-color: var(--color-brand-dark);
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
        }
        .article-content th {
            background: var(--color-surface);
            color: var(--color-text);
            font-weight: 600;
            padding: 10px 14px;
            text-align: left;
            border: 1px solid var(--color-border);
        }
        .article-content td {
            padding: 10px 14px;
            border: 1px solid var(--color-border);
            color: var(--color-text-secondary);
        }
        .article-content code {
            background: rgba(88, 196, 221, 0.1);
            color: var(--color-brand);
            font-size: 0.9em;
            padding: 2px 6px;
            border-radius: 6px;
        }
        .article-content hr {
            border: none;
            border-top: 1px solid var(--color-border);
            margin: 40px 0;
        }
        .article-empty {
            text-align: center;
            padding: 60px 20px;
        }
        .article-empty p {
            font-size: 22px;
            color: var(--color-text-secondary);
            margin-bottom: 20px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: transform .2s ease-out, box-shadow .2s ease-out, background .2s ease-out, color .2s ease-out;
            border: none;
            text-decoration: none;
        }
        .btn:focus-visible {
            outline: 2px solid var(--color-brand);
            outline-offset: 2px;
        }
        .btn-accent {
            background: var(--color-accent);
            color: #0C1116;
        }
        .btn-accent:hover {
            background: #FFB631;
            color: #0C1116;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 165, 36, 0.25);
        }
        .btn-accent:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(245, 165, 36, 0.2);
        }
        .btn-outline {
            background: transparent;
            border: 1px solid var(--color-border);
            color: var(--color-text);
        }
        .btn-outline:hover {
            border-color: var(--color-brand);
            color: var(--color-brand);
            background: rgba(88, 196, 221, 0.06);
        }
        .btn-large {
            height: 52px;
            padding: 0 36px;
            font-size: 16px;
        }
        .related-section {
            padding: var(--spacing-section) 0 60px;
            border-top: 1px solid var(--color-border);
            background: linear-gradient(to bottom, var(--color-bg), var(--color-surface-alt) 35%);
            position: relative;
            z-index: 1;
        }
        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-header h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
            letter-spacing: -0.01em;
        }
        .section-header p {
            font-size: 15px;
            color: var(--color-text-secondary);
            margin-top: 8px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-card);
            transition: transform .2s ease-out, box-shadow .2s ease-out, border-color .2s ease-out;
            text-decoration: none;
            color: var(--color-text);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(88, 196, 221, 0.3);
            color: var(--color-text);
        }
        .related-card:active {
            transform: translateY(-2px);
        }
        .related-card:focus-visible {
            outline: 2px solid var(--color-brand);
            outline-offset: 2px;
        }
        .related-thumb {
            height: 180px;
            overflow: hidden;
            position: relative;
            background: var(--color-surface-alt);
        }
        .related-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform .4s ease-out;
        }
        .related-card:hover .related-thumb img {
            transform: scale(1.04);
        }
        .related-thumb::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(12, 17, 22, 0.5), transparent 60%);
        }
        .related-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }
        .related-body .badge {
            align-self: flex-start;
            font-size: 12px;
            font-weight: 600;
            background: rgba(88, 196, 221, 0.12);
            color: var(--color-brand);
            padding: 3px 12px;
            border-radius: var(--radius-badge);
        }
        .related-body h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.45;
            color: var(--color-text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-body p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 4px;
        }
        .related-date {
            font-family: var(--font-num);
            font-size: 12px;
            color: var(--color-text-disabled);
        }
        .cta-section {
            position: relative;
            z-index: 1;
            background: var(--color-surface-alt);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            padding: 72px 0;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 20% 50%, rgba(88, 196, 221, 0.1), transparent 50%), radial-gradient(circle at 80% 20%, rgba(245, 165, 36, 0.04), transparent 40%);
            pointer-events: none;
        }
        .cta-inner {
            text-align: center;
            position: relative;
        }
        .cta-inner h2 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
            color: var(--color-text);
            margin-bottom: 14px;
        }
        .cta-inner p {
            font-size: 16px;
            color: var(--color-text-secondary);
            margin-bottom: 32px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
        }
        .footer {
            background: #090E13;
            border-top: 1px solid var(--color-border);
            padding: 64px 0 0;
            position: relative;
            z-index: 1;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 1.1fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-brand .logo {
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--color-text-secondary);
            transition: color .2s ease;
        }
        .footer-col ul li a:hover {
            color: var(--color-brand);
        }
        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .contact-row {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--color-text-secondary);
        }
        .contact-row svg {
            width: 16px;
            height: 16px;
            stroke: var(--color-brand);
            flex-shrink: 0;
        }
        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--color-text-disabled);
        }
        .footer-bottom-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .footer-bottom-links a {
            font-size: 13px;
            color: var(--color-text-disabled);
        }
        .footer-bottom-links a:hover {
            color: var(--color-brand);
        }
        .mobile-more-menu,
        .mobile-cat-menu {
            display: none;
        }
        @media (max-width: 1024px) {
            .main-nav {
                gap: 0;
            }
            .main-nav a {
                padding: 8px 10px;
                font-size: 13px;
            }
            .header-cta {
                padding: 0 16px;
                font-size: 13px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 767px) {
            :root {
                --spacing-section: 64px;
                --header-height: 56px;
            }
            .container {
                padding: 0 16px;
            }
            .site-header {
                height: var(--header-height);
            }
            .header-inner {
                height: var(--header-height);
            }
            .main-nav {
                display: none;
            }
            .header-cta {
                display: none;
            }
            .mobile-bottom-nav {
                display: flex;
                position: fixed;
                bottom: 0;
                left: 0;
                width: 100%;
                height: var(--mobile-tab-height);
                background: rgba(12, 17, 22, 0.96);
                border-top: 1px solid var(--color-border);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                z-index: 200;
                align-items: center;
                justify-content: space-around;
                padding-bottom: env(safe-area-inset-bottom);
            }
            .mb-item {
                display: flex;
                flex-direction: column;
                align-items: center;
                justify-content: center;
                gap: 2px;
                padding: 6px 10px;
                color: var(--color-text-secondary);
                font-size: 11px;
                font-weight: 500;
                position: relative;
                transition: color .2s ease;
            }
            .mb-item svg {
                width: 22px;
                height: 22px;
            }
            .mb-item .label {
                font-size: 10px;
                line-height: 1.2;
            }
            .mb-item.active {
                color: var(--color-brand);
            }
            .mb-item.active::before {
                content: '';
                position: absolute;
                top: -12px;
                left: 50%;
                transform: translateX(-50%);
                width: 4px;
                height: 4px;
                border-radius: 50%;
                background: var(--color-accent);
            }
            .mb-popover {
                display: none;
                position: fixed;
                bottom: calc(var(--mobile-tab-height) + 12px);
                left: 16px;
                right: 16px;
                background: var(--color-surface);
                border: 1px solid var(--color-border);
                border-radius: 16px;
                padding: 14px;
                box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
                z-index: 210;
                opacity: 0;
                transform: translateY(12px);
                transition: opacity .2s ease, transform .2s ease;
            }
            .mb-popover.show {
                display: block;
                opacity: 1;
                transform: translateY(0);
            }
            .mb-popover a {
                display: block;
                padding: 10px 14px;
                color: var(--color-text-secondary);
                font-size: 14px;
                border-radius: 12px;
                margin-bottom: 2px;
            }
            .mb-popover a:hover {
                background: rgba(88, 196, 221, 0.08);
                color: var(--color-brand);
            }
            body {
                padding-bottom: var(--mobile-tab-height);
            }
            .article-header {
                padding-top: 24px;
            }
            .article-header h1 {
                font-size: 30px;
                line-height: 1.3;
            }
            .article-meta {
                gap: 10px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .cta-section {
                padding: 48px 0;
            }
            .cta-inner h2 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .article-content {
                font-size: 15px;
            }
            .article-content h2 {
                font-size: 22px;
            }
        }
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
            }
            html {
                scroll-behavior: auto;
            }
            .related-card:hover {
                transform: none;
            }
        }
        @media (max-width: 520px) {
            .article-header h1 {
                font-size: 26px;
            }
            .breadcrumb {
                font-size: 12px;
            }
            .related-body h3 {
                font-size: 16px;
            }
        }

/* roulang page: category3 */
:root{
  --brand:#58C4DD;
  --brand-dark:#3FA9C4;
  --bg:#0C1116;
  --surface:#131A22;
  --surface-2:#17202A;
  --accent:#F5A524;
  --accent-hover:#FFB940;
  --text:#E8EEF2;
  --text-secondary:#8A9AA7;
  --text-disabled:rgba(255,255,255,0.35);
  --border:rgba(255,255,255,0.08);
  --border-strong:rgba(88,196,221,0.3);
  --success:#34D399;
  --error:#F87171;
  --font-sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  --font-num:'Inter',Arial,sans-serif;
  --radius-sm:8px;
  --radius-md:12px;
  --radius-lg:16px;
  --radius-full:999px;
  --shadow-sm:0 1px 3px rgba(0,0,0,0.3);
  --shadow-md:0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg:0 0 0 1px rgba(88,196,221,0.3),0 8px 32px rgba(0,0,0,0.4);
  --section-gap:96px;
  --container-pad:24px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--font-sans);
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  background-image:radial-gradient(ellipse at 50% 0%,rgba(88,196,221,0.06),transparent 60%);
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--brand-dark);}
a:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
button{font-family:var(--font-sans);cursor:pointer;border:none;background:none;color:inherit;}
ul,ol{list-style:none;}
.container{max-width:1200px;margin:0 auto;padding:0 var(--container-pad);}
.section{padding:var(--section-gap) 0;position:relative;}
.section-head{text-align:center;max-width:680px;margin:0 auto 52px;}
.section-head h2{font-size:34px;line-height:1.25;font-weight:700;letter-spacing:-0.01em;margin-bottom:12px;}
.section-head p{color:var(--text-secondary);font-size:16px;}
.section-head .head-line{width:48px;height:3px;background:var(--brand);border-radius:var(--radius-full);margin:16px auto 0;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 28px;border-radius:var(--radius-md);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  transition:all .2s ease-out;white-space:nowrap;
}
.btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.btn-primary{background:var(--accent);color:#0C1116;border:1px solid transparent;}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 6px 24px rgba(245,165,36,.25);color:#0C1116;}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-outline{border:1px solid var(--brand);color:var(--brand);background:transparent;}
.btn-outline:hover{border-color:var(--brand-dark);color:var(--brand-dark);transform:translateY(-2px);background:rgba(88,196,221,.06);}
.btn-outline:active{transform:translateY(0);}
.btn-lg{height:52px;padding:0 36px;font-size:16px;border-radius:var(--radius-md);}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;padding:4px 14px;border-radius:var(--radius-full);
  font-size:12px;font-weight:600;letter-spacing:.04em;line-height:1.6;
  background:rgba(88,196,221,.12);color:var(--brand);border:1px solid rgba(88,196,221,.25);
}
.badge-accent{background:rgba(245,165,36,.12);color:var(--accent);border-color:rgba(245,165,36,.25);}
.badge-success{background:rgba(52,211,153,.12);color:var(--success);border-color:rgba(52,211,153,.25);}

/* 导航 */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(12,17,22,.95);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);height:72px;
  transition:background .3s ease;
}
.nav-wrapper{max-width:1200px;margin:0 auto;padding:0 var(--container-pad);height:100%;display:flex;align-items:center;gap:32px;}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-icon{
  width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,rgba(88,196,221,.2),rgba(88,196,221,.05));
  border:1px solid rgba(88,196,221,.3);display:flex;align-items:center;justify-content:center;color:var(--brand);
}
.logo-icon svg{width:20px;height:20px;}
.logo-text{display:flex;flex-direction:column;line-height:1.1;}
.logo-text strong{font-size:17px;font-weight:700;color:var(--text);letter-spacing:.01em;}
.logo-text span{font-size:11px;color:var(--text-secondary);letter-spacing:.06em;}
.main-nav{display:flex;align-items:center;gap:6px;margin:0 auto;}
.main-nav a{
  padding:8px 16px;border-radius:var(--radius-full);font-size:14px;font-weight:500;
  color:var(--text-secondary);transition:all .2s ease;white-space:nowrap;
}
.main-nav a:hover{color:var(--text);background:rgba(255,255,255,.04);}
.main-nav a.active{color:var(--brand);background:rgba(88,196,221,.1);font-weight:600;}
.main-nav a:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.nav-btn{flex-shrink:0;}
.nav-toggle{display:none;flex-shrink:0;width:40px;height:40px;border-radius:10px;border:1px solid var(--border);align-items:center;justify-content:center;color:var(--text);}
.nav-toggle:hover{border-color:var(--brand);color:var(--brand);}
.nav-toggle svg{width:20px;height:20px;}

/* 移动端底部Tab */
.mobile-tabbar{
  display:none;position:fixed;bottom:0;left:0;right:0;z-index:1000;
  background:rgba(12,17,22,.97);backdrop-filter:blur(12px);
  border-top:1px solid var(--border);height:56px;
}
.mobile-tabbar a{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  color:var(--text-secondary);font-size:11px;transition:color .2s ease;position:relative;
}
.mobile-tabbar a svg{width:20px;height:20px;}
.mobile-tabbar a.active{color:var(--accent);}
.mobile-tabbar a.active::before{
  content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:24px;height:3px;border-radius:0 0 3px 3px;background:var(--accent);
}

/* Hero */
.page-hero{
  min-height:60vh;display:flex;align-items:center;position:relative;overflow:hidden;
  padding:72px 0 80px;background:linear-gradient(135deg,rgba(12,17,22,.92),rgba(12,17,22,.75));
}
.page-hero .hero-bg{
  position:absolute;top:0;left:0;right:0;bottom:0;z-index:-1;
  background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  opacity:.32;
}
.page-hero .hero-bg::after{
  content:'';position:absolute;top:0;left:0;right:0;bottom:0;
  background:radial-gradient(ellipse at center 20%,rgba(88,196,221,.1),transparent 55%);
}
.hero-content{max-width:760px;}
.hero-kicker{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:20px;
  font-size:14px;font-weight:600;color:var(--brand);letter-spacing:.1em;text-transform:uppercase;
}
.hero-kicker::before{content:'';width:28px;height:2px;background:var(--brand);border-radius:2px;}
.page-hero h1{
  font-size:52px;line-height:1.2;font-weight:800;letter-spacing:-.02em;margin-bottom:16px;
}
.page-hero h1 .highlight{color:var(--brand);}
.hero-sub{
  font-size:17px;color:var(--text-secondary);line-height:1.7;margin-bottom:32px;max-width:560px;
}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;}
.scroll-indicator{
  position:absolute;bottom:0;left:50%;transform:translateX(-50%);
  width:1px;height:40px;background:linear-gradient(180deg,var(--brand),transparent);
}

/* 图文分栏 */
.split-section{background:var(--bg);}
.split-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center;
}
.split-media{border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);box-shadow:var(--shadow-md);}
.split-media img{width:100%;height:420px;object-fit:cover;transition:transform .5s ease;}
.split-media:hover img{transform:scale(1.03);}
.split-content h2{font-size:32px;line-height:1.3;font-weight:700;margin-bottom:16px;letter-spacing:-.01em;}
.split-content .lead{color:var(--text-secondary);font-size:16px;line-height:1.8;margin-bottom:24px;}
.check-list li{
  display:flex;align-items:flex-start;gap:12px;padding:10px 0;font-size:15px;line-height:1.7;
  border-bottom:1px solid var(--border);
}
.check-list li:last-child{border-bottom:none;}
.check-list li::before{
  content:'';flex-shrink:0;width:18px;height:18px;border-radius:50%;margin-top:4px;
  background:rgba(88,196,221,.15);border:1px solid var(--brand);
  display:flex;align-items:center;justify-content:center;
}
.check-list li::after{
  content:'';position:absolute;width:6px;height:10px;border-right:2px solid var(--brand);
  border-bottom:2px solid var(--brand);transform:rotate(40deg);margin-left:6px;margin-top:3px;
}
.check-list li{position:relative;padding-left:36px;}
.check-list li::before{position:absolute;left:0;top:12px;margin:0;}
.check-list li::after{position:absolute;left:6px;top:17px;margin:0;}

/* 模式卡片 */
.modes-section{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.modes-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:24px;
}
.mode-card{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);
  overflow:hidden;transition:all .3s ease;display:flex;flex-direction:column;
}
.mode-card:hover{
  transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgba(88,196,221,.35);
}
.mode-card .mode-img{height:180px;overflow:hidden;position:relative;}
.mode-card .mode-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.mode-card:hover .mode-img img{transform:scale(1.05);}
.mode-card .mode-img .badge{position:absolute;top:12px;left:12px;z-index:2;backdrop-filter:blur(4px);background:rgba(12,17,22,.7);border-color:rgba(255,255,255,.15);}
.mode-body{padding:20px;display:flex;flex-direction:column;flex:1;}
.mode-body h3{font-size:18px;font-weight:700;margin-bottom:8px;line-height:1.4;}
.mode-body p{font-size:14px;color:var(--text-secondary);line-height:1.7;flex:1;}

/* 时间线 */
.timeline-section{background:var(--bg);}
.timeline{max-width:720px;margin:0 auto;position:relative;padding-left:0;}
.timeline::before{
  content:'';position:absolute;left:28px;top:0;bottom:0;width:2px;
  background:linear-gradient(180deg,rgba(88,196,221,.5),rgba(88,196,221,.05));
}
.tl-item{position:relative;padding:0 0 48px 80px;}
.tl-item:last-child{padding-bottom:0;}
.tl-marker{
  position:absolute;left:0;top:4px;width:56px;height:56px;border-radius:50%;
  background:var(--surface);border:2px solid var(--brand);
  display:flex;align-items:center;justify-content:center;z-index:2;
  box-shadow:0 0 0 4px rgba(88,196,221,.1);
}
.tl-marker span{font-family:var(--font-num);font-size:18px;font-weight:700;color:var(--brand);}
.tl-content h3{font-size:20px;font-weight:700;margin-bottom:6px;}
.tl-content p{font-size:15px;color:var(--text-secondary);line-height:1.7;}

/* 操作提示 */
.tips-section{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.tips-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.tip-card{
  background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:32px 28px;transition:all .3s ease;
}
.tip-card:hover{border-color:rgba(88,196,221,.35);transform:translateY(-4px);box-shadow:var(--shadow-md);}
.tip-icon{
  width:48px;height:48px;border-radius:12px;background:rgba(88,196,221,.1);
  border:1px solid rgba(88,196,221,.25);display:flex;align-items:center;justify-content:center;
  color:var(--brand);margin-bottom:20px;
}
.tip-icon svg{width:24px;height:24px;}
.tip-card h3{font-size:18px;font-weight:700;margin-bottom:8px;}
.tip-card p{font-size:14px;color:var(--text-secondary);line-height:1.7;}

/* 延伸阅读 */
.related-section{background:var(--bg);}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.related-card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);
  padding:32px 28px;text-align:center;transition:all .3s ease;display:flex;flex-direction:column;align-items:center;
}
.related-card:hover{transform:translateY(-4px);border-color:rgba(88,196,221,.35);box-shadow:var(--shadow-md);}
.related-card .related-icon{
  width:56px;height:56px;border-radius:50%;background:rgba(88,196,221,.1);
  display:flex;align-items:center;justify-content:center;color:var(--brand);margin-bottom:16px;
}
.related-card .related-icon svg{width:26px;height:26px;}
.related-card h3{font-size:18px;font-weight:700;margin-bottom:8px;}
.related-card p{font-size:14px;color:var(--text-secondary);margin-bottom:16px;line-height:1.7;}
.related-card .link-more{font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:4px;}
.related-card .link-more:hover{color:var(--brand-dark);}

/* FAQ */
.faq-section{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.faq-container{max-width:800px;margin:0 auto;}
.faq-list{border-top:1px solid var(--border);}
.faq-item{border-bottom:1px solid var(--border);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;font-size:16px;font-weight:600;color:var(--text);text-align:left;
  transition:color .2s ease;line-height:1.5;
}
.faq-q:hover{color:var(--brand);}
.faq-q:focus-visible{outline:2px solid var(--brand);outline-offset:-2px;border-radius:4px;}
.faq-icon{
  flex-shrink:0;width:28px;height:28px;border-radius:50%;border:1px solid var(--border);
  display:flex;align-items:center;justify-content:center;transition:all .3s ease;color:var(--text-secondary);
}
.faq-icon svg{width:14px;height:14px;transition:transform .3s ease;}
.faq-item.active .faq-icon{transform:rotate(45deg);border-color:var(--brand);color:var(--brand);}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .3s ease;
  padding-left:0;
}
.faq-item.active .faq-a{max-height:200px;padding-bottom:20px;}
.faq-a p{font-size:14px;color:var(--text-secondary);line-height:1.8;}

/* CTA */
.cta-section{
  position:relative;overflow:hidden;padding:96px 0;text-align:center;
  background:var(--bg);
}
.cta-section::before{
  content:'';position:absolute;top:0;left:0;right:0;bottom:0;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  opacity:.12;
}
.cta-section .container{position:relative;z-index:2;}
.cta-section h2{font-size:36px;font-weight:800;margin-bottom:12px;letter-spacing:-.01em;}
.cta-section .cta-sub{font-size:16px;color:var(--text-secondary);margin-bottom:32px;}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}

/* 页脚 */
.footer{
  background:#090E13;border-top:1px solid var(--border);padding:72px 0 0;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:48px;padding-bottom:48px;
}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:14px;color:var(--text-secondary);line-height:1.7;max-width:280px;}
.footer-col h4{
  font-size:15px;font-weight:700;color:var(--text);margin-bottom:20px;letter-spacing:.02em;
}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{font-size:14px;color:var(--text-secondary);transition:color .2s ease;}
.footer-col ul a:hover{color:var(--brand);}
.footer-contact .contact-row{
  display:flex;align-items:center;gap:10px;margin-bottom:14px;font-size:14px;color:var(--text-secondary);
}
.footer-contact .contact-row svg{width:18px;height:18px;color:var(--brand);flex-shrink:0;}
.footer-bottom{
  border-top:1px solid var(--border);padding:24px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-disabled);
}
.footer-bottom-links{display:flex;gap:20px;flex-wrap:wrap;}
.footer-bottom-links a{font-size:13px;color:var(--text-secondary);}
.footer-bottom-links a:hover{color:var(--brand);}

/* 滚动条 */
::-webkit-scrollbar{width:10px;height:10px;}
::-webkit-scrollbar-track{background:var(--bg);}
::-webkit-scrollbar-thumb{background:rgba(255,255,255,.15);border-radius:5px;}
::-webkit-scrollbar-thumb:hover{background:rgba(88,196,221,.3);}

/* 响应式 */
@media (max-width:1280px){
  .container{max-width:1100px;}
  .modes-grid{grid-template-columns:repeat(3,1fr);}
  .tips-grid{grid-template-columns:repeat(3,1fr);}
  .related-grid{grid-template-columns:repeat(3,1fr);}
}
@media (max-width:1024px){
  :root{--section-gap:80px;}
  .main-nav a{padding:8px 12px;font-size:13px;}
  .nav-wrapper{gap:16px;}
  .modes-grid{grid-template-columns:repeat(2,1fr);}
  .split-grid{grid-template-columns:1fr;gap:40px;}
  .split-media img{height:340px;}
  .tips-grid{grid-template-columns:repeat(2,1fr);}
  .related-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;}
}
@media (max-width:768px){
  :root{--section-gap:64px;--container-pad:16px;}
  .site-header{height:56px;}
  .main-nav{display:none;}
  .nav-btn{display:none;}
  .nav-toggle{display:flex;}
  .page-hero{min-height:60vh;padding:56px 0 64px;}
  .page-hero h1{font-size:36px;}
  .hero-sub{font-size:15px;}
  .hero-actions .btn{height:44px;padding:0 20px;font-size:14px;}
  .modes-grid{grid-template-columns:1fr;gap:16px;}
  .mode-card .mode-img{height:160px;}
  .tips-grid{grid-template-columns:1fr;gap:16px;}
  .related-grid{grid-template-columns:1fr;gap:16px;}
  .timeline::before{left:24px;}
  .tl-item{padding-left:64px;}
  .tl-marker{width:48px;height:48px;}
  .section-head h2{font-size:28px;}
  .cta-section h2{font-size:28px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1/-1;}
  .footer-bottom{flex-direction:column;text-align:center;}
  .faq-q{font-size:15px;}
  .mobile-tabbar{display:flex;}
  body{padding-bottom:56px;}
}
@media (max-width:520px){
  :root{--section-gap:56px;}
  .page-hero h1{font-size:30px;}
  .split-media img{height:240px;}
  .tl-content h3{font-size:17px;}
  .tl-marker{width:44px;height:44px;}
  .tl-item{padding-left:56px;}
  .timeline::before{left:21px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .cta-section{padding:64px 0;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important;}
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
    :root {
      --brand: #58C4DD;
      --brand-dark: #3FA9C4;
      --bg-deep: #0C1116;
      --surface: #131A22;
      --accent: #F5A524;
      --text-main: #E8EEF2;
      --text-secondary: #8A9AA7;
      --text-disabled: rgba(255, 255, 255, 0.35);
      --border: rgba(255, 255, 255, 0.08);
      --success: #34D399;
      --danger: #F87171;
      --radius-card: 16px;
      --radius-btn: 12px;
      --radius-badge: 999px;
      --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
      --shadow-hover: 0 0 0 1px rgba(88, 196, 221, 0.3), 0 8px 32px rgba(0, 0, 0, 0.4);
      --font-main: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --font-num: 'Inter', Arial, sans-serif;
      --header-h: 72px;
      --spacer-section: 96px;
      --spacer-section-mobile: 64px;
    }

    /* ===== 基础 Reset ===== */
    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-main);
      background-color: var(--bg-deep);
      background-image:
        radial-gradient(ellipse at 20% 0%, rgba(88, 196, 221, 0.06) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 100%, rgba(245, 165, 36, 0.03) 0%, transparent 50%);
      color: var(--text-main);
      font-size: 16px;
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      color: var(--brand);
      text-decoration: none;
      transition: color 0.2s ease;
    }

    a:hover {
      color: var(--brand-dark);
    }

    button,
    input,
    select,
    textarea {
      font-family: var(--font-main);
      font-size: 16px;
    }

    button {
      cursor: pointer;
      border: none;
      background: none;
      color: inherit;
    }

    ul,
    ol {
      list-style: none;
    }

    h1,
    h2,
    h3,
    h4 {
      line-height: 1.25;
      letter-spacing: -0.01em;
      font-weight: 700;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    .section {
      padding: 96px 0;
    }

    .section-muted {
      background: rgba(255, 255, 255, 0.015);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .section-head {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-head .eyebrow {
      display: inline-block;
      font-size: 13px;
      letter-spacing: 0.12em;
      color: var(--brand);
      background: rgba(88, 196, 221, 0.1);
      padding: 4px 16px;
      border-radius: var(--radius-badge);
      margin-bottom: 12px;
    }

    .section-head h2 {
      font-size: 36px;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .section-head p {
      color: var(--text-secondary);
      font-size: 16px;
      max-width: 640px;
      margin: 0 auto;
    }

    /* ===== 按钮 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 15px;
      line-height: 1;
      transition: all 0.2s ease-out;
      border: 1px solid transparent;
      letter-spacing: 0.01em;
    }

    .btn-primary {
      background: var(--accent);
      color: #0C1116;
    }

    .btn-primary:hover {
      background: #ffb940;
      color: #0C1116;
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(245, 165, 36, 0.3);
    }

    .btn-primary:active {
      transform: translateY(0);
      box-shadow: 0 4px 12px rgba(245, 165, 36, 0.2);
    }

    .btn-primary:focus-visible,
    .btn-outline:focus-visible {
      outline: 2px solid var(--brand);
      outline-offset: 3px;
    }

    .btn-outline {
      border: 1px solid rgba(88, 196, 221, 0.5);
      color: var(--brand);
      background: transparent;
    }

    .btn-outline:hover {
      border-color: var(--brand);
      color: var(--brand);
      background: rgba(88, 196, 221, 0.08);
      transform: translateY(-2px);
    }

    .btn-outline:active {
      border-color: var(--brand-dark);
      transform: translateY(0);
    }

    .btn-large {
      height: 52px;
      padding: 0 40px;
      font-size: 16px;
      border-radius: 14px;
    }

    /* ===== 徽章 / 标签 ===== */
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      border-radius: var(--radius-badge);
      font-size: 12px;
      font-weight: 600;
      letter-spacing: 0.04em;
      line-height: 1.4;
      background: rgba(88, 196, 221, 0.12);
      color: var(--brand);
    }

    .badge-gold {
      background: rgba(245, 165, 36, 0.12);
      color: var(--accent);
    }

    /* ===== 布局辅类 ===== */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    /* ===== 头部导航 ===== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: var(--header-h);
      z-index: 1000;
      background: rgba(12, 17, 22, 0.95);
      border-bottom: 1px solid var(--border);
      transition: background 0.3s ease, backdrop-filter 0.3s ease;
      backdrop-filter: blur(18px);
    }

    .header-inner {
      display: flex;
      align-items: center;
      height: 100%;
      justify-content: space-between;
      gap: 32px;
    }

    .logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
      border-radius: 8px;
    }

    .logo:focus-visible {
      outline: 2px solid var(--brand);
      outline-offset: 4px;
    }

    .logo-icon {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      background: linear-gradient(135deg, var(--brand) 0%, #2E8CA3 100%);
      border-radius: 10px;
      color: #0C1116;
      box-shadow: 0 0 20px rgba(88, 196, 221, 0.2);
    }

    .logo-icon svg {
      width: 22px;
      height: 22px;
    }

    .logo-text {
      display: flex;
      flex-direction: column;
      line-height: 1.1;
    }

    .logo-text strong {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: 0.01em;
    }

    .logo-text span {
      font-size: 12px;
      color: var(--text-secondary);
      letter-spacing: 0.08em;
      margin-top: 2px;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 6px;
      margin: 0 auto;
    }

    .main-nav a {
      display: inline-flex;
      align-items: center;
      height: 40px;
      padding: 0 16px;
      border-radius: var(--radius-btn);
      font-size: 15px;
      font-weight: 500;
      color: var(--text-secondary);
      transition: all 0.2s ease;
      position: relative;
      border: 1px solid transparent;
    }

    .main-nav a:hover {
      color: var(--brand);
      background: rgba(88, 196, 221, 0.08);
    }

    .main-nav a.active {
      color: var(--brand);
      background: rgba(88, 196, 221, 0.1);
    }

    .main-nav a.active::after {
      content: '';
      position: absolute;
      left: 16px;
      right: 16px;
      bottom: 4px;
      height: 2px;
      background: var(--brand);
      border-radius: 2px;
    }

    .main-nav a:focus-visible {
      outline: 2px solid var(--brand);
      outline-offset: 2px;
    }

    .header-cta {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--accent);
      color: #0C1116;
      font-size: 14px;
      font-weight: 700;
      padding: 10px 20px;
      border-radius: var(--radius-btn);
      transition: all 0.2s ease-out;
      flex-shrink: 0;
    }

    .header-cta:hover {
      background: #ffb940;
      color: #0C1116;
      transform: translateY(-1px);
      box-shadow: 0 4px 16px rgba(245, 165, 36, 0.3);
    }

    .header-cta:active {
      transform: translateY(0);
    }

    .header-cta:focus-visible {
      outline: 2px solid var(--brand);
      outline-offset: 3px;
    }

    .nav-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border-radius: 10px;
      align-items: center;
      justify-content: center;
      color: var(--text-main);
      border: 1px solid var(--border);
      transition: all 0.2s ease;
    }

    .nav-toggle:hover {
      border-color: var(--brand);
      color: var(--brand);
    }

    .nav-toggle:focus-visible {
      outline: 2px solid var(--brand);
      outline-offset: 2px;
    }

    .nav-toggle svg {
      width: 22px;
      height: 22px;
    }

    /* ===== 页面 Hero ===== */
    .page-hero {
      position: relative;
      padding: 160px 0 100px;
      background: var(--bg-deep);
      overflow: hidden;
      border-bottom: 1px solid var(--border);
    }

    .page-hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.16;
    }

    .page-hero::after {
      content: '';
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 800px;
      height: 800px;
      background: radial-gradient(circle, rgba(88, 196, 221, 0.12) 0%, transparent 70%);
      pointer-events: none;
    }

    .page-hero .container {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 60px;
      align-items: center;
    }

    .hero-content .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(88, 196, 221, 0.1);
      border: 1px solid rgba(88, 196, 221, 0.25);
      padding: 6px 16px;
      border-radius: var(--radius-badge);
      font-size: 13px;
      color: var(--brand);
      margin-bottom: 20px;
    }

    .hero-content .hero-badge::before {
      content: '';
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--brand);
      flex-shrink: 0;
    }

    .hero-content h1 {
      font-size: 48px;
      line-height: 1.2;
      color: var(--text-main);
      margin-bottom: 18px;
      letter-spacing: -0.02em;
    }

    .hero-content h1 .highlight {
      color: var(--brand);
      position: relative;
      white-space: nowrap;
    }

    .hero-content p.hero-sub {
      font-size: 18px;
      color: var(--text-secondary);
      line-height: 1.7;
      max-width: 440px;
      margin-bottom: 32px;
    }

    .hero-cta {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .hero-art {
      position: relative;
      z-index: 2;
    }

    .hero-art .image-frame {
      border-radius: 20px;
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
      background: var(--surface);
    }

    .hero-art .image-frame img {
      width: 100%;
      height: 340px;
      object-fit: cover;
    }

    .hero-art .image-caption {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 20px;
      background: var(--surface);
      border-top: 1px solid var(--border);
    }

    .hero-art .image-caption span {
      font-size: 13px;
      color: var(--text-secondary);
    }

    .hero-art .image-caption strong {
      color: var(--text-main);
      font-weight: 600;
      font-size: 14px;
    }

    .scroll-indicator {
      position: absolute;
      bottom: 24px;
      left: 50%;
      transform: translateX(-50%);
      width: 1px;
      height: 40px;
      background: linear-gradient(to bottom, var(--brand), transparent);
      opacity: 0.5;
      z-index: 5;
    }

    /* ===== 版本信息卡片 ===== */
    .info-cards {
      padding: 96px 0;
    }

    .card-item {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      padding: 28px 24px;
      transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .card-item::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, var(--brand), transparent);
      opacity: 0.4;
      transition: opacity 0.3s ease;
    }

    .card-item:hover {
      transform: translateY(-4px);
      border-color: rgba(88, 196, 221, 0.3);
      box-shadow: var(--shadow-hover);
    }

    .card-item:hover::before {
      opacity: 1;
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: rgba(88, 196, 221, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--brand);
      margin-bottom: 20px;
    }

    .card-icon svg {
      width: 24px;
      height: 24px;
    }

    .card-item h3 {
      font-size: 18px;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card-item p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .card-item .card-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-top: 14px;
      border-top: 1px solid var(--border);
    }

    .card-item .card-meta .text-tag {
      font-size: 12px;
      color: var(--text-secondary);
    }

    .card-item .card-meta .link-arrow {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      border: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--brand);
      transition: all 0.2s ease;
    }

    .card-item .card-meta .link-arrow:hover {
      background: rgba(88, 196, 221, 0.15);
      border-color: var(--brand);
    }

    .card-item .card-meta .link-arrow svg {
      width: 16px;
      height: 16px;
    }

    /* ===== 时间线 ===== */
    .timeline-section {
      padding: 96px 0;
      background: var(--surface);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
      position: relative;
    }

    .timeline {
      position: relative;
      max-width: 840px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .timeline::before {
      content: '';
      position: absolute;
      top: 0;
      bottom: 0;
      left: 50%;
      width: 2px;
      background: linear-gradient(to bottom, transparent, var(--brand), transparent);
      opacity: 0.4;
      transform: translateX(-50%);
    }

    .timeline-item {
      position: relative;
      padding: 16px 0 48px;
      width: 50%;
    }

    .timeline-item:nth-child(odd) {
      left: 0;
      padding-right: 48px;
      text-align: right;
    }

    .timeline-item:nth-child(even) {
      left: 50%;
      padding-left: 48px;
      text-align: left;
    }

    .timeline-item:last-child {
      padding-bottom: 0;
    }

    .timeline-dot {
      position: absolute;
      top: 24px;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--bg-deep);
      border: 3px solid var(--brand);
      box-shadow: 0 0 12px rgba(88, 196, 221, 0.5);
      z-index: 2;
    }

    .timeline-item:nth-child(odd) .timeline-dot {
      right: -7px;
    }

    .timeline-item:nth-child(even) .timeline-dot {
      left: -7px;
    }

    .timeline-card {
      background: var(--bg-deep);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 24px;
      transition: border-color 0.3s ease, box-shadow 0.3s ease;
    }

    .timeline-card:hover {
      border-color: rgba(88, 196, 221, 0.35);
      box-shadow: 0 0 0 1px rgba(88, 196, 221, 0.2), 0 8px 24px rgba(0, 0, 0, 0.3);
    }

    .timeline-card .timeline-date {
      font-family: var(--font-num);
      font-size: 13px;
      color: var(--brand);
      font-weight: 700;
      display: block;
      margin-bottom: 8px;
    }

    .timeline-card h3 {
      font-size: 18px;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .timeline-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    .timeline-card .tl-badge {
      display: inline-block;
      margin-top: 12px;
      font-size: 12px;
      padding: 3px 10px;
      background: rgba(245, 165, 36, 0.12);
      color: var(--accent);
      border-radius: var(--radius-badge);
    }

    /* ===== 图文分栏 ===== */
    .split-section {
      padding: 96px 0;
    }

    .split-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .split-image {
      border-radius: 20px;
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
    }

    .split-image img {
      width: 100%;
      height: 380px;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .split-image:hover img {
      transform: scale(1.03);
    }

    .split-content .split-tag {
      display: inline-block;
      font-size: 13px;
      color: var(--brand);
      background: rgba(88, 196, 221, 0.1);
      padding: 4px 14px;
      border-radius: var(--radius-badge);
      margin-bottom: 16px;
    }

    .split-content h2 {
      font-size: 32px;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .split-content p {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.8;
      margin-bottom: 20px;
    }

    .split-list {
      margin-top: 20px;
    }

    .split-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 10px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    .split-list li:last-child {
      border-bottom: none;
    }

    .split-list li .check-icon {
      flex-shrink: 0;
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: rgba(52, 211, 153, 0.15);
      color: var(--success);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-top: 2px;
    }

    .split-list li .check-icon svg {
      width: 12px;
      height: 12px;
    }

    /* ===== FAQ ===== */
    .faq-section {
      padding: 96px 0;
      background: var(--surface);
      border-top: 1px solid var(--border);
    }

    .faq-list {
      max-width: 760px;
      margin: 0 auto;
    }

    .faq-item {
      border-bottom: 1px solid var(--border);
      transition: background 0.2s ease;
    }

    .faq-item:first-child {
      border-top: 1px solid var(--border);
    }

    .faq-q {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      width: 100%;
      padding: 20px 8px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      text-align: left;
      background: none;
      transition: color 0.2s ease;
    }

    .faq-q:hover {
      color: var(--brand);
    }

    .faq-q:focus-visible {
      outline: 2px solid var(--brand);
      outline-offset: -2px;
      border-radius: 8px;
    }

    .faq-q .faq-icon {
      flex-shrink: 0;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      border: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-secondary);
      transition: all 0.3s ease;
    }

    .faq-q .faq-icon svg {
      width: 14px;
      height: 14px;
    }

    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      border-color: var(--brand);
      color: var(--brand);
    }

    .faq-a {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
    }

    .faq-item.open .faq-a {
      max-height: 200px;
      padding: 0 8px 20px;
    }

    .faq-a p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    /* ===== CTA ===== */
    .cta-section {
      position: relative;
      padding: 80px 0;
      background: var(--bg-deep);
      overflow: hidden;
      text-align: center;
      border-bottom: 1px solid var(--border);
    }

    .cta-section::before {
      content: '';
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      width: 600px;
      height: 600px;
      background: radial-gradient(circle, rgba(88, 196, 221, 0.08) 0%, transparent 70%);
      pointer-events: none;
    }

    .cta-section .container {
      position: relative;
      z-index: 2;
    }

    .cta-section h2 {
      font-size: 36px;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.02em;
    }

    .cta-section p {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 520px;
      margin: 0 auto 32px;
    }

    .cta-section .btn {
      margin: 0 8px;
    }

    /* ===== 页脚 ===== */
    .footer {
      background: #090E13;
      padding: 64px 0 0;
      border-top: 1px solid var(--border);
      position: relative;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 48px;
      padding-bottom: 48px;
    }

    .footer-brand .logo {
      margin-bottom: 16px;
    }

    .footer-brand p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      max-width: 320px;
    }

    .footer-col h4 {
      font-size: 16px;
      color: var(--text-main);
      margin-bottom: 20px;
      font-weight: 600;
    }

    .footer-col ul li {
      margin-bottom: 10px;
    }

    .footer-col ul a {
      font-size: 14px;
      color: var(--text-secondary);
      transition: color 0.2s ease, padding-left 0.2s ease;
      padding-left: 0;
    }

    .footer-col ul a:hover {
      color: var(--brand);
      padding-left: 4px;
    }

    .footer-col ul a:focus-visible {
      outline: 2px solid var(--brand);
      outline-offset: 2px;
      border-radius: 4px;
    }

    .footer-contact .contact-row {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      padding: 8px 0;
      font-size: 14px;
      color: var(--text-secondary);
    }

    .footer-contact .contact-row svg {
      width: 18px;
      height: 18px;
      color: var(--brand);
      flex-shrink: 0;
      margin-top: 2px;
    }

    .footer-bottom {
      border-top: 1px solid var(--border);
      padding: 20px 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
    }

    .footer-bottom span {
      font-size: 13px;
      color: var(--text-disabled);
    }

    .footer-bottom-links {
      display: flex;
      gap: 24px;
    }

    .footer-bottom-links a {
      font-size: 13px;
      color: var(--text-secondary);
      transition: color 0.2s ease;
    }

    .footer-bottom-links a:hover {
      color: var(--brand);
    }

    /* ===== 移动端底部 Tab ===== */
    .mobile-tabbar {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      height: 56px;
      background: rgba(12, 17, 22, 0.98);
      border-top: 1px solid var(--border);
      z-index: 1001;
      backdrop-filter: blur(12px);
    }

    .tabbar-inner {
      display: flex;
      align-items: stretch;
      height: 100%;
    }

    .tab-item {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 3px;
      color: var(--text-secondary);
      font-size: 11px;
      position: relative;
      transition: color 0.2s ease;
      padding: 4px 0;
    }

    .tab-item svg {
      width: 22px;
      height: 22px;
    }

    .tab-item:hover {
      color: var(--text-main);
    }

    .tab-item:focus-visible {
      outline: 2px solid var(--brand);
      outline-offset: -2px;
      border-radius: 8px;
    }

    .tab-item.active {
      color: var(--accent);
    }

    .tab-item.active::before {
      content: '';
      position: absolute;
      top: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 4px;
      height: 4px;
      border-radius: 50%;
      background: var(--accent);
    }

    /* ===== 移动端弹层 ===== */
    .mobile-overlay {
      position: fixed;
      inset: 0;
      background: rgba(12, 17, 22, 0.85);
      z-index: 1002;
      opacity: 0;
      visibility: hidden;
      transition: opacity 0.3s ease, visibility 0.3s ease;
      backdrop-filter: blur(12px);
    }

    .mobile-overlay.show {
      opacity: 1;
      visibility: visible;
    }

    .overlay-panel {
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      background: var(--surface);
      border-top-left-radius: 24px;
      border-top-right-radius: 24px;
      padding: 32px 24px 24px;
      transform: translateY(100%);
      transition: transform 0.3s ease-out;
      border: 1px solid var(--border);
    }

    .mobile-overlay.show .overlay-panel {
      transform: translateY(0);
    }

    .overlay-panel .drag-handle {
      width: 36px;
      height: 4px;
      border-radius: 4px;
      background: rgba(255, 255, 255, 0.15);
      margin: 0 auto 24px;
    }

    .overlay-panel h3 {
      font-size: 18px;
      color: var(--text-main);
      margin-bottom: 16px;
      text-align: center;
    }

    .overlay-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .overlay-link {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
      padding: 16px 12px;
      background: var(--bg-deep);
      border: 1px solid var(--border);
      border-radius: 14px;
      color: var(--text-main);
      font-size: 14px;
      font-weight: 500;
      transition: all 0.2s ease;
    }

    .overlay-link svg {
      width: 24px;
      height: 24px;
      color: var(--brand);
    }

    .overlay-link:hover {
      border-color: var(--brand);
      color: var(--brand);
      background: rgba(88, 196, 221, 0.06);
    }

    .overlay-link:active {
      transform: scale(0.97);
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
      .container {
        max-width: 100%;
        padding-left: 20px;
        padding-right: 20px;
      }

      .main-nav {
        gap: 2px;
      }

      .main-nav a {
        padding: 0 12px;
        font-size: 14px;
      }

      .hero-content h1 {
        font-size: 40px;
      }

      .page-hero .container {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
      }

      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }

      .grid-3 {
        grid-template-columns: repeat(3, 1fr);
      }

      .split-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
    }

    @media (max-width: 768px) {
      :root {
        --header-h: 56px;
        --spacer-section: 64px;
      }

      .container {
        padding-left: 16px;
        padding-right: 16px;
      }

      .site-header {
        height: var(--header-h);
      }

      .header-inner {
        gap: 8px;
      }

      .main-nav,
      .header-cta {
        display: none;
      }

      .nav-toggle {
        display: inline-flex;
      }

      .section {
        padding: 64px 0;
      }

      .page-hero {
        padding: 120px 0 64px;
      }

      .page-hero .container {
        grid-template-columns: 1fr;
        gap: 32px;
      }

      .hero-content h1 {
        font-size: 36px;
      }

      .hero-content p.hero-sub {
        font-size: 16px;
      }

      .hero-art .image-frame img {
        height: 220px;
      }

      .grid-2,
      .grid-3,
      .grid-4 {
        grid-template-columns: 1fr;
      }

      .section-head h2 {
        font-size: 28px;
      }

      .card-item {
        padding: 20px;
      }

      .timeline::before {
        left: 12px;
      }

      .timeline-item,
      .timeline-item:nth-child(odd),
      .timeline-item:nth-child(even) {
        width: 100%;
        left: 0 !important;
        padding-left: 40px !important;
        padding-right: 0 !important;
        text-align: left !important;
      }

      .timeline-dot,
      .timeline-item:nth-child(odd) .timeline-dot,
      .timeline-item:nth-child(even) .timeline-dot {
        left: 5px !important;
        right: auto !important;
      }

      .timeline-card {
        padding: 20px;
      }

      .split-section {
        padding: 64px 0;
      }

      .split-image img {
        height: 240px;
      }

      .split-content h2 {
        font-size: 28px;
      }

      .faq-section,
      .cta-section,
      .timeline-section {
        padding: 64px 0;
      }

      .faq-q {
        font-size: 15px;
        padding: 16px 4px;
      }

      .faq-item.open .faq-a {
        max-height: 300px;
      }

      .cta-section h2 {
        font-size: 30px;
      }

      .cta-section .btn {
        display: block;
        width: 100%;
        max-width: 280px;
        margin: 0 auto 12px;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
        padding-bottom: 32px;
      }

      .footer-brand {
        grid-column: 1 / -1;
      }

      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }

      .footer-bottom-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
      }

      .mobile-tabbar {
        display: block;
      }

      body {
        padding-bottom: 56px;
      }
    }

    @media (max-width: 520px) {
      .hero-content h1 {
        font-size: 30px;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }

      .footer-brand {
        grid-column: 1;
      }

      .section-head h2 {
        font-size: 26px;
      }

      .cta-section h2 {
        font-size: 26px;
      }

      .overlay-grid {
        grid-template-columns: 1fr;
      }
    }

    /* ===== 减弱动效 ===== */
    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
      }
    }

/* roulang page: category4 */
:root {
            --brand: #58C4DD;
            --brand-dark: #3FA9C4;
            --brand-soft: rgba(88, 196, 221, 0.12);
            --brand-glow: rgba(88, 196, 221, 0.15);
            --bg: #0C1116;
            --surface: #131A22;
            --surface-deep: #090E13;
            --accent: #F5A524;
            --accent-dark: #d98f15;
            --text: #E8EEF2;
            --text-secondary: #8A9AA7;
            --text-disabled: rgba(255, 255, 255, 0.35);
            --border: rgba(255, 255, 255, 0.08);
            --border-brand: rgba(88, 196, 221, 0.3);
            --success: #34D399;
            --danger: #F87171;
            --radius: 16px;
            --radius-sm: 12px;
            --radius-pill: 999px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
            --shadow-hover: 0 0 0 1px rgba(88, 196, 221, 0.3), 0 8px 32px rgba(0, 0, 0, 0.4);
            --nav-height: 72px;
            --container: 1200px;
            --section-space: 96px;
            --section-space-mobile: 64px;
            --transition: 200ms ease-out;
            --font-cn: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-num: "Inter", Arial, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-cn);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        body::before {
            content: "";
            position: fixed;
            inset: 0;
            pointer-events: none;
            z-index: 0;
            opacity: 0.35;
            background-image: radial-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px);
            background-size: 3px 3px;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: var(--brand);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--brand-dark);
        }

        button {
            font-family: var(--font-cn);
            border: none;
            background: none;
            cursor: pointer;
            color: inherit;
        }

        input,
        textarea {
            font-family: var(--font-cn);
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--nav-height);
            z-index: 100;
            background: rgba(12, 17, 22, 0.95);
            border-bottom: 1px solid var(--border);
            transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(12, 17, 22, 0.98);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
        }

        .header-inner {
            display: flex;
            align-items: center;
            gap: 32px;
            height: var(--nav-height);
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            color: var(--text);
        }

        .logo:hover {
            color: var(--text);
        }

        .logo-icon {
            width: 34px;
            height: 34px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);
            border-radius: 10px;
            color: #0C1116;
            box-shadow: 0 0 20px rgba(88, 196, 221, 0.35);
        }

        .logo-icon svg {
            width: 20px;
            height: 20px;
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .logo-text strong {
            font-size: 17px;
            font-weight: 700;
            letter-spacing: 0.02em;
            color: var(--text);
        }

        .logo-text span {
            font-size: 11px;
            color: var(--brand);
            letter-spacing: 0.1em;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-left: auto;
            flex: 1;
            justify-content: flex-end;
        }

        .main-nav a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 15px;
            color: var(--text-secondary);
            border-radius: var(--radius-pill);
            transition: color var(--transition), background var(--transition);
        }

        .main-nav a:hover {
            color: var(--brand);
            background: var(--brand-soft);
        }

        .main-nav a.active {
            color: var(--brand);
            background: var(--brand-soft);
            font-weight: 600;
        }

        .header-cta {
            margin-left: 8px;
            flex-shrink: 0;
        }

        .burger {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            border: 1px solid var(--border);
            background: var(--surface);
            margin-left: auto;
        }

        .burger span {
            display: block;
            width: 18px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: transform var(--transition), opacity var(--transition);
        }

        .burger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .burger.active span:nth-child(2) {
            opacity: 0;
        }

        .burger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 56px;
            left: 0;
            right: 0;
            background: rgba(12, 17, 22, 0.98);
            border-bottom: 1px solid var(--border);
            padding: 16px 24px 24px;
            z-index: 99;
            transform: translateY(-8px);
            transition: opacity var(--transition), transform var(--transition);
        }

        .mobile-menu.open {
            display: block;
            transform: translateY(0);
        }

        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            font-size: 15px;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--brand);
            background: var(--brand-soft);
        }

        .mobile-menu .menu-cta {
            margin-top: 12px;
            text-align: center;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            cursor: pointer;
            border: 1px solid transparent;
            line-height: 1.4;
            min-height: 44px;
        }

        .btn:focus-visible {
            outline: 3px solid var(--brand-glow);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--accent);
            color: #0C1116;
            border-color: var(--accent);
        }

        .btn-primary:hover {
            background: #ffb83d;
            border-color: #ffb83d;
            color: #0C1116;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 165, 36, 0.3);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-outline {
            background: transparent;
            color: var(--brand);
            border-color: rgba(88, 196, 221, 0.6);
        }

        .btn-outline:hover {
            border-color: var(--brand);
            color: var(--brand);
            background: var(--brand-soft);
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: translateY(0);
        }

        .btn-lg {
            min-height: 52px;
            padding: 14px 40px;
            font-size: 17px;
            border-radius: 14px;
        }

        /* ===== Bottom Tab (Mobile) ===== */
        .bottom-tab {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 62px;
            background: rgba(12, 17, 22, 0.97);
            border-top: 1px solid var(--border);
            z-index: 100;
            backdrop-filter: blur(12px);
        }

        .bottom-tab-inner {
            display: flex;
            height: 100%;
            padding: 0 4px;
        }

        .bottom-tab a {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            font-size: 11px;
            color: var(--text-secondary);
            position: relative;
            transition: color var(--transition);
            border-radius: var(--radius-sm);
        }

        .bottom-tab a i {
            font-size: 17px;
            line-height: 1;
        }

        .bottom-tab a.active {
            color: var(--accent);
            font-weight: 600;
        }

        .bottom-tab a.active::before {
            content: "";
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 0 0 4px 4px;
            background: var(--accent);
        }

        .bottom-tab a:hover {
            color: var(--brand);
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            padding: 160px 0 72px;
            overflow: hidden;
            border-bottom: 1px solid var(--border);
        }

        .page-hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background-image: linear-gradient(to right, rgba(12, 17, 22, 0.92) 0%, rgba(12, 17, 22, 0.75) 50%, rgba(12, 17, 22, 0.35) 100%), url("/assets/images/backpic/back-3.webp");
            background-size: cover;
            background-position: center;
        }

        .page-hero::after {
            content: "";
            position: absolute;
            inset: auto 0 0 0;
            height: 120px;
            background: linear-gradient(to bottom, transparent, var(--bg));
            z-index: 0;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }

        .breadcrumb a {
            color: var(--text-secondary);
        }

        .breadcrumb a:hover {
            color: var(--brand);
        }

        .breadcrumb .sep {
            color: var(--text-disabled);
        }

        .page-hero h1 {
            font-size: 44px;
            line-height: 1.25;
            letter-spacing: -0.01em;
            font-weight: 800;
            max-width: 720px;
            margin-bottom: 16px;
        }

        .page-hero h1 span {
            color: var(--brand);
        }

        .page-hero .hero-desc {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 560px;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-stats {
            display: flex;
            gap: 48px;
            margin-top: 48px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
            max-width: 520px;
        }

        .hero-stats .stat-num {
            font-family: var(--font-num);
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            font-variant-numeric: tabular-nums;
        }

        .hero-stats .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 2px;
        }

        /* ===== Section Common ===== */
        .section-head {
            margin-bottom: 48px;
            max-width: 680px;
        }

        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand);
            background: var(--brand-soft);
            border: 1px solid var(--border-brand);
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 32px;
            line-height: 1.3;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text);
            margin-bottom: 12px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .section-space {
            padding: var(--section-space) 0;
        }

        /* ===== Timeline ===== */
        .timeline-section {
            padding: var(--section-space) 0;
            position: relative;
        }

        .timeline-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 50%;
            width: 1px;
            height: 100%;
            background: linear-gradient(to bottom, transparent, var(--border-brand), var(--border), transparent);
            pointer-events: none;
        }

        .timeline {
            position: relative;
            max-width: 880px;
            margin: 0 auto;
        }

        .timeline-item {
            position: relative;
            display: flex;
            margin-bottom: 40px;
            align-items: flex-start;
        }

        .timeline-item:last-child {
            margin-bottom: 0;
        }

        .tl-marker {
            width: 56px;
            height: 56px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--surface);
            border: 1px solid var(--border-brand);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-num);
            font-weight: 700;
            font-size: 16px;
            color: var(--brand);
            box-shadow: 0 0 0 6px rgba(88, 196, 221, 0.06);
            margin-right: 28px;
            position: relative;
            z-index: 1;
        }

        .tl-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px 28px;
            flex: 1;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .tl-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow);
            border-color: var(--border-brand);
        }

        .tl-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .tl-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .tl-card .tl-step {
            font-size: 13px;
            color: var(--brand);
            font-weight: 600;
            margin-bottom: 6px;
        }

        /* ===== Checklist Cards ===== */
        .checklist-section {
            padding: var(--section-space) 0;
            background: var(--surface-deep);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .check-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .check-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }

        .check-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-brand);
        }

        .check-card .card-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }

        .check-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition);
        }

        .check-card:hover .card-img img {
            transform: scale(1.05);
        }

        .check-card .card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(12, 17, 22, 0.6), transparent);
        }

        .check-body {
            padding: 24px;
        }

        .badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--brand);
            background: var(--brand-soft);
            border-radius: var(--radius-pill);
            padding: 3px 12px;
            margin-bottom: 10px;
        }

        .check-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }

        .check-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ===== Risk Section ===== */
        .risk-section {
            padding: var(--section-space) 0;
        }

        .risk-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .risk-image {
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            position: relative;
        }

        .risk-image img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }

        .risk-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, transparent 40%, rgba(88, 196, 221, 0.12));
            pointer-events: none;
        }

        .risk-content {
            padding-right: 16px;
        }

        .risk-content h2 {
            font-size: 30px;
            line-height: 1.3;
            margin-bottom: 20px;
            color: var(--text);
        }

        .risk-list li {
            display: flex;
            gap: 16px;
            padding: 18px 0;
            border-bottom: 1px solid var(--border);
            align-items: flex-start;
        }

        .risk-list li:last-child {
            border-bottom: none;
        }

        .risk-list .rk-icon {
            width: 40px;
            height: 40px;
            flex-shrink: 0;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand);
            background: var(--brand-soft);
            border: 1px solid var(--border-brand);
        }

        .risk-list .rk-icon i {
            font-size: 16px;
        }

        .risk-list strong {
            display: block;
            font-size: 16px;
            color: var(--text);
            margin-bottom: 4px;
        }

        .risk-list p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--section-space) 0;
            background: var(--surface-deep);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
        }

        .faq-item:first-child {
            border-top: 1px solid var(--border);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            min-height: 56px;
            padding: 12px 4px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            border-radius: 0;
            transition: color var(--transition);
        }

        .faq-question:hover {
            color: var(--brand);
        }

        .faq-question:focus-visible {
            outline: 2px solid var(--brand);
            outline-offset: 2px;
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            transition: transform var(--transition), border-color var(--transition), background var(--transition);
        }

        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            background: var(--text-secondary);
            border-radius: 1px;
            transition: background var(--transition), transform var(--transition);
        }

        .faq-icon::before {
            width: 10px;
            height: 2px;
        }

        .faq-icon::after {
            width: 2px;
            height: 10px;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            border-color: var(--brand);
            background: var(--brand-soft);
        }

        .faq-item.active .faq-icon::before,
        .faq-item.active .faq-icon::after {
            background: var(--brand);
        }

        .faq-answer {
            display: none;
            padding: 0 40px 20px 4px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            position: relative;
            text-align: center;
            overflow: hidden;
            background: var(--bg);
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(88, 196, 221, 0.12) 0%, transparent 60%);
            pointer-events: none;
        }

        .cta-section::after {
            content: "";
            position: absolute;
            inset: 0;
            opacity: 0.4;
            background-image: radial-gradient(circle at 20% 40%, rgba(245, 165, 36, 0.06) 0, transparent 40%),
                radial-gradient(circle at 80% 70%, rgba(88, 196, 221, 0.05) 0, transparent 40%);
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .cta-section p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 32px;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--surface-deep);
            border-top: 1px solid var(--border);
            padding: 64px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .footer .logo {
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            max-width: 300px;
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 16px;
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul a {
            font-size: 14px;
            color: var(--text-secondary);
        }

        .footer-col ul a:hover {
            color: var(--brand);
        }

        .footer-contact .contact-row {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }

        .footer-contact .contact-row svg {
            width: 16px;
            height: 16px;
            flex-shrink: 0;
            color: var(--brand);
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 24px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .footer-bottom-links {
            display: flex;
            gap: 20px;
        }

        .footer-bottom-links a {
            font-size: 13px;
            color: var(--text-secondary);
        }

        .footer-bottom-links a:hover {
            color: var(--brand);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .check-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .risk-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .risk-image img {
                height: 320px;
            }

            .risk-content {
                padding-right: 0;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 767px) {
            :root {
                --section-space: 64px;
            }

            .container {
                padding: 0 16px;
            }

            .site-header {
                height: 56px;
            }

            .header-inner {
                height: 56px;
            }

            .main-nav,
            .header-cta {
                display: none;
            }

            .burger {
                display: flex;
            }

            .bottom-tab {
                display: block;
            }

            .logo-text strong {
                font-size: 16px;
            }

            .logo-icon {
                width: 30px;
                height: 30px;
                border-radius: 8px;
            }

            .logo-icon svg {
                width: 18px;
                height: 18px;
            }

            .page-hero {
                padding: 120px 0 56px;
            }

            .page-hero h1 {
                font-size: 30px;
            }

            .page-hero .hero-desc {
                font-size: 15px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
                margin-top: 32px;
            }

            .hero-stats .stat-num {
                font-size: 24px;
            }

            .section-head h2 {
                font-size: 24px;
            }

            .section-head p {
                font-size: 14px;
            }

            .timeline-section::before {
                left: 22px;
            }

            .tl-marker {
                width: 44px;
                height: 44px;
                margin-right: 16px;
                font-size: 14px;
                box-shadow: 0 0 0 4px rgba(88, 196, 221, 0.06);
            }

            .tl-card {
                padding: 18px 20px;
            }

            .tl-card h3 {
                font-size: 17px;
            }

            .tl-card p {
                font-size: 14px;
            }

            .check-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .check-card .card-img {
                height: 150px;
            }

            .risk-image img {
                height: 240px;
            }

            .risk-content h2 {
                font-size: 24px;
            }

            .cta-section {
                padding: 56px 0;
            }

            .cta-section h2 {
                font-size: 28px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 32px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }

            .footer-bottom-links {
                flex-wrap: wrap;
                justify-content: center;
            }

            main {
                padding-bottom: 62px;
            }
        }

        @media (min-width: 768px) {
            .mobile-menu {
                display: none !important;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms;
                transition-duration: 0.01ms;
                scroll-behavior: auto;
            }

            .btn:hover,
            .check-card:hover,
            .tl-card:hover {
                transform: none;
            }
        }