/* roulang page: index */
:root{
  --bg-primary:#05070F;
  --bg-secondary:#0A0F1E;
  --accent-blue:#2D6BFF;
  --accent-cyan:#32E0FF;
  --accent-gold:#FFB020;
  --text-primary:#FFFFFF;
  --text-secondary:#A6B0C3;
  --text-muted:#5A6A85;
  --border-white:rgba(255,255,255,0.08);
  --card-bg:rgba(255,255,255,0.04);
  --card-border:rgba(255,255,255,0.10);
  --radius-card:16px;
  --radius-btn:10px;
  --shadow-card:0 8px 32px rgba(0,0,0,0.25);
  --shadow-hover:0 20px 48px rgba(0,0,0,0.45);
  --font-main:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"DIN Alternate","Inter",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:var(--font-main);background:var(--bg-primary);color:var(--text-primary);line-height:1.8;font-size:15px;-webkit-font-smoothing:antialiased;}
a{color:inherit;text-decoration:none;transition:all .3s ease;}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--accent-cyan);outline-offset:2px;}
img{max-width:100%;display:block;}
button,input{font-family:inherit;}
button{cursor:pointer;border:none;background:none;}
ul{list-style:none;}
.row{max-width:1200px;margin:0 auto;}
.columns{padding:0 12px;}
.section{padding:100px 0;position:relative;}
.section-alt{background:var(--bg-secondary);}
.section-head{margin-bottom:56px;text-align:center;}
.section-tag{display:inline-block;padding:6px 18px;border-radius:999px;font-size:12px;letter-spacing:.08em;color:var(--accent-cyan);border:1px solid rgba(50,224,255,.3);background:rgba(50,224,255,.08);margin-bottom:16px;}
.section-title{font-size:34px;font-weight:800;line-height:1.3;color:var(--text-primary);}
.section-desc{font-size:15px;color:var(--text-secondary);margin-top:12px;}
.btn{display:inline-flex;align-items:center;justify-content:center;height:48px;padding:0 32px;border-radius:var(--radius-btn);font-size:16px;font-weight:600;transition:all .3s ease;text-decoration:none;min-height:44px;}
.btn-primary{background:linear-gradient(135deg,var(--accent-blue),var(--accent-cyan));color:#fff;box-shadow:0 12px 40px rgba(45,107,255,.45);}
.btn-primary:hover{box-shadow:0 16px 56px rgba(50,224,255,.55);transform:translateY(-2px);color:#fff;}
.btn-outline{border:1px solid rgba(255,255,255,.3);color:#fff;background:transparent;}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.08);color:#fff;transform:translateY(-2px);}
.btn-lg{height:52px;padding:0 44px;font-size:16px;}
.site-header{position:fixed;top:0;left:0;width:100%;height:76px;z-index:100;display:flex;align-items:center;transition:background .4s ease,box-shadow .4s ease;}
.site-header.scrolled{background:rgba(5,7,15,.85);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(255,255,255,.08);box-shadow:0 8px 32px rgba(0,0,0,.3);}
.header-inner{display:flex;align-items:center;justify-content:space-between;width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;}
.brand-mark{font-weight:800;font-size:20px;letter-spacing:.02em;color:#fff;line-height:1;}
.brand-divider{width:1px;height:20px;background:rgba(255,255,255,.2);}
.brand-tag{font-size:11px;color:rgba(255,255,255,.5);letter-spacing:.1em;line-height:1;}
.nav-links{display:flex;align-items:center;gap:32px;}
.nav-link{position:relative;font-size:14px;color:rgba(255,255,255,.85);font-weight:500;padding:6px 2px;letter-spacing:.02em;transition:color .3s ease;text-decoration:none;}
.nav-link::after{content:'';position:absolute;left:50%;bottom:0;transform:translateX(-50%) scaleX(0);width:20px;height:2px;background:linear-gradient(90deg,var(--accent-blue),var(--accent-cyan));transform-origin:center;transition:transform .3s ease;border-radius:2px;}
.nav-link:hover{color:#fff;}
.nav-link:hover::after{transform:translateX(-50%) scaleX(1);}
.nav-link.active{color:#fff;}
.nav-link.active::after{transform:translateX(-50%) scaleX(1);}
.nav-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;flex-direction:column;gap:5px;}
.nav-toggle span{display:block;width:22px;height:2px;background:#fff;border-radius:2px;transition:all .3s ease;}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.active span:nth-child(2){opacity:0;}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.mobile-menu{display:none;}
.hero{position:relative;min-height:calc(100vh - 76px);display:flex;align-items:center;overflow:hidden;padding-top:76px;}
.hero-bg{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.webp');background-size:cover;background-position:center;}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(250deg,rgba(5,7,15,.82) 0%,rgba(5,7,15,.55) 45%,rgba(5,7,15,.25) 100%);}
.hero-gridlines{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);background-size:50px 50px;}
.hero-content{position:relative;z-index:2;max-width:1200px;margin:0 auto;padding:80px 24px;width:100%;}
.hero h1{font-size:56px;font-weight:800;line-height:1.15;max-width:840px;color:#fff;}
.hero-sub{font-size:18px;color:var(--text-secondary);margin-top:20px;max-width:520px;line-height:1.7;}
.hero-cta{display:flex;align-items:center;gap:16px;margin-top:40px;flex-wrap:wrap;}
.hero-stats{display:flex;gap:0;margin-top:80px;border-top:1px solid rgba(255,255,255,.1);padding-top:28px;max-width:720px;flex-wrap:wrap;}
.stat{padding-left:28px;margin-right:28px;border-left:1px solid rgba(255,255,255,.15);}
.stat:first-child{border-left:none;padding-left:0;}
.stat-num{display:block;font-family:var(--font-num);font-size:28px;font-weight:700;color:#fff;line-height:1.2;}
.stat-label{font-size:12px;color:var(--text-muted);letter-spacing:.08em;margin-top:4px;}
.agenda-section{background-image:linear-gradient(rgba(5,7,15,.92),rgba(5,7,15,.94)),url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;}
.agenda-tabs{display:flex;justify-content:center;gap:8px;margin-bottom:48px;flex-wrap:wrap;}
.agenda-tab{padding:10px 28px;border-radius:999px;font-size:14px;color:var(--text-secondary);border:1px solid rgba(255,255,255,.12);transition:all .3s ease;background:rgba(255,255,255,.02);}
.agenda-tab.active,.agenda-tab:hover{background:linear-gradient(135deg,var(--accent-blue),var(--accent-cyan));color:#fff;border-color:transparent;box-shadow:0 8px 24px rgba(45,107,255,.35);}
.timeline{position:relative;max-width:960px;margin:0 auto;padding:40px 0;}
.timeline::before{content:'';position:absolute;left:50%;top:0;bottom:0;width:1px;background:rgba(255,255,255,.1);transform:translateX(-50%);}
.timeline-item{position:relative;width:50%;padding-right:40px;text-align:right;margin-bottom:48px;}
.timeline-item:nth-child(even){margin-left:50%;padding-right:0;padding-left:40px;text-align:left;}
.timeline-dot{position:absolute;top:6px;width:10px;height:10px;background:var(--accent-cyan);border-radius:50%;box-shadow:0 0 0 6px rgba(50,224,255,.15),0 0 16px rgba(50,224,255,.6);right:-5px;}
.timeline-item:nth-child(even) .timeline-dot{right:auto;left:-5px;}
.timeline-time{font-family:var(--font-num);font-size:14px;color:var(--accent-cyan);letter-spacing:.05em;}
.timeline-name{font-size:17px;font-weight:600;margin-top:6px;color:#fff;}
.timeline-place{font-size:13px;color:var(--text-muted);margin-top:4px;}
.speaker-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-card);padding:32px 24px;text-align:center;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);box-shadow:var(--shadow-card);transition:all .4s ease;position:relative;overflow:hidden;height:100%;}
.speaker-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover);border-color:rgba(255,255,255,.18);}
.speaker-avatar{width:88px;height:88px;border-radius:50%;margin:0 auto 20px;overflow:hidden;border:2px solid rgba(255,255,255,.15);box-shadow:0 8px 24px rgba(0,0,0,.3);}
.speaker-avatar img{width:100%;height:100%;object-fit:cover;}
.speaker-name{font-size:18px;font-weight:700;color:#fff;}
.speaker-title{font-size:13px;color:var(--text-secondary);margin-top:6px;}
.feature-card{display:flex;gap:18px;background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-card);padding:28px;transition:all .3s ease;height:100%;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);box-shadow:var(--shadow-card);}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(255,255,255,.18);}
.feature-icon{width:36px;height:36px;border-radius:50%;background:rgba(45,107,255,.15);display:flex;align-items:center;justify-content:center;color:var(--accent-cyan);flex-shrink:0;}
.feature-icon svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}
.feature-title{font-size:16px;font-weight:600;color:#fff;}
.feature-desc{font-size:14px;color:var(--text-secondary);margin-top:6px;line-height:1.7;}
.ticket-card{position:relative;background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-card);padding:36px 28px;text-align:center;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);box-shadow:var(--shadow-card);transition:all .4s ease;height:100%;}
.ticket-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(255,255,255,.18);}
.ticket-card.featured{background:rgba(255,255,255,.06);border:1px solid rgba(50,224,255,.4);box-shadow:0 0 50px rgba(45,107,255,.2);transform:translateY(-20px);}
.ticket-card.featured:hover{transform:translateY(-24px);}
.ticket-badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,var(--accent-gold),#FF8A00);color:#1a1200;padding:4px 16px;border-radius:999px;font-size:12px;font-weight:700;white-space:nowrap;box-shadow:0 6px 20px rgba(255,176,32,.35);}
.ticket-name{font-size:20px;font-weight:700;color:#fff;}
.ticket-price{font-size:40px;font-weight:800;margin:16px 0;font-family:var(--font-num);color:#fff;line-height:1;}
.ticket-price .symbol{font-size:20px;vertical-align:top;margin-right:2px;}
.ticket-origin{font-size:13px;color:var(--text-muted);font-weight:400;}
.ticket-benefits{list-style:none;margin:20px 0 28px;padding:0;text-align:left;}
.ticket-benefits li{padding:8px 0;color:var(--text-secondary);font-size:14px;border-bottom:1px solid rgba(255,255,255,.05);display:flex;gap:8px;align-items:center;}
.ticket-benefits li::before{content:'✓';color:var(--accent-cyan);font-weight:700;}
.news-card{display:block;background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-card);overflow:hidden;text-decoration:none;box-shadow:var(--shadow-card);transition:all .4s ease;height:100%;position:relative;}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(255,255,255,.18);}
.news-thumb{height:180px;position:relative;overflow:hidden;background:linear-gradient(135deg,#0A1F3E,#0E2A52);}
.news-thumb::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 60%,rgba(5,7,15,.5));}
.news-card:nth-child(3n+1) .news-thumb{background:linear-gradient(135deg,#0B1D40,#12386E);}
.news-card:nth-child(3n+2) .news-thumb{background:linear-gradient(135deg,#072A3A,#0F4C5C);}
.news-card:nth-child(3n+3) .news-thumb{background:linear-gradient(135deg,#1A1140,#33246E);}
.news-tag{display:inline-block;margin:20px 20px 0;padding:4px 14px;border-radius:999px;font-size:12px;background:rgba(50,224,255,.1);color:var(--accent-cyan);border:1px solid rgba(50,224,255,.2);}
.news-title{font-size:18px;font-weight:700;margin:12px 20px;line-height:1.4;color:#fff;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;}
.news-summary{font-size:14px;color:var(--text-secondary);margin:0 20px;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;line-height:1.7;}
.news-meta{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;color:var(--text-muted);font-size:13px;border-top:1px solid rgba(255,255,255,.06);margin-top:16px;}
.empty-state{text-align:center;padding:64px 24px;background:var(--card-bg);border:1px dashed rgba(255,255,255,.12);border-radius:var(--radius-card);color:var(--text-secondary);font-size:15px;}
.empty-icon{width:48px;height:48px;margin:0 auto 16px;border-radius:50%;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);position:relative;}
.empty-icon::before{content:'';position:absolute;width:18px;height:18px;border:2px solid var(--text-muted);border-radius:50%;top:14px;left:14px;}
.faq-list{max-width:860px;margin:0 auto;}
.faq-item{background:var(--card-bg);border:1px solid var(--card-border);border-radius:14px;margin-bottom:14px;overflow:hidden;transition:all .3s ease;}
.faq-item.open{border-color:rgba(50,224,255,.25);background:rgba(255,255,255,.05);}
.faq-question{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;font-size:16px;font-weight:600;cursor:pointer;color:var(--text-primary);transition:all .3s ease;}
.faq-question:hover{color:var(--accent-cyan);}
.faq-icon{width:24px;height:24px;position:relative;flex-shrink:0;margin-left:16px;}
.faq-icon::before,.faq-icon::after{content:'';position:absolute;background:var(--accent-cyan);border-radius:2px;transition:all .3s ease;}
.faq-icon::before{width:14px;height:2px;top:11px;left:5px;}
.faq-icon::after{width:2px;height:14px;top:5px;left:11px;}
.faq-item.open .faq-icon::after{opacity:0;transform:rotate(90deg);}
.faq-answer{max-height:0;overflow:hidden;padding:0 24px;color:var(--text-secondary);font-size:14px;line-height:1.8;transition:max-height .35s ease,padding .35s ease;}
.faq-item.open .faq-answer{max-height:400px;padding-bottom:20px;}
.register-section{background-image:linear-gradient(rgba(5,7,15,.92),rgba(5,7,15,.95)),url('/assets/images/backpic/back-3.webp');background-size:cover;background-position:center;}
.register-box{max-width:720px;margin:0 auto;text-align:center;position:relative;z-index:2;}
.register-box h2{color:#fff;}
.register-desc{font-size:15px;color:var(--text-secondary);margin-top:12px;}
.form-row{display:flex;gap:16px;margin-top:36px;flex-wrap:wrap;}
.form-input{flex:1;min-width:200px;height:48px;padding:0 16px;border-radius:10px;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.08);color:#fff;font-size:15px;outline:none;transition:all .3s ease;}
.form-input:focus{border-color:var(--accent-blue);box-shadow:0 0 0 4px rgba(45,107,255,.2);background:rgba(255,255,255,.1);}
.form-input::placeholder{color:var(--text-muted);}
.form-row .btn{flex-shrink:0;}
.register-phone{margin-top:24px;font-size:14px;color:var(--text-secondary);}
.register-phone a{color:var(--accent-cyan);text-decoration:none;}
.register-phone a:hover{text-decoration:underline;}
.success-box{padding:24px 32px;background:rgba(50,224,255,.08);border:1px solid rgba(50,224,255,.3);border-radius:16px;color:var(--accent-cyan);font-size:15px;text-align:center;}
.site-footer{background:#04060C;border-top:1px solid rgba(255,255,255,.08);padding:64px 0 24px;}
.footer-grid{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;}
.footer-col{flex:1;min-width:200px;}
.footer-brand-title{font-size:18px;font-weight:800;color:#fff;}
.footer-desc{font-size:13px;color:var(--text-secondary);margin-top:12px;line-height:1.8;max-width:260px;}
.footer-title{font-size:14px;font-weight:700;margin-bottom:16px;color:var(--text-primary);}
.footer-links li a{font-size:13px;color:rgba(255,255,255,.65);padding:6px 0;display:inline-block;text-decoration:none;}
.footer-links li a:hover{color:#fff;}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:48px;padding-top:24px;border-top:1px solid rgba(255,255,255,.08);font-size:13px;color:var(--text-muted);flex-wrap:wrap;gap:12px;}
.back-top{position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);color:#fff;display:flex;align-items:center;justify-content:center;z-index:100;opacity:0;pointer-events:none;transition:all .3s ease;cursor:pointer;}
.back-top.show{opacity:1;pointer-events:auto;}
.back-top:hover{background:rgba(45,107,255,.3);border-color:var(--accent-cyan);}
.back-top svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}
body.no-scroll{overflow:hidden;}
@media (max-width:1023px){
  .section{padding:72px 0;}
  .hero h1{font-size:42px;}
  .ticket-card.featured{transform:translateY(-12px);}
}
@media (max-width:767px){
  .section{padding:56px 0;}
  .nav-links{display:none;}
  .nav-toggle{display:flex;}
  .site-header{height:68px;}
  .hero{padding-top:68px;min-height:calc(100vh - 68px);}
  .hero h1{font-size:32px;}
  .hero-sub{font-size:16px;}
  .hero-stats{margin-top:48px;gap:20px;}
  .stat{padding-left:16px;margin-right:16px;}
  .mobile-menu{position:fixed;top:68px;left:0;width:100%;height:calc(100vh - 68px);background:rgba(5,7,15,.95);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);z-index:99;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:32px;opacity:0;visibility:hidden;transition:opacity .3s ease,visibility .3s ease;}
  .mobile-menu.active{opacity:1;visibility:visible;}
  .mobile-menu .nav-link{font-size:20px;color:#fff;}
  .timeline::before{left:8px;transform:none;}
  .timeline-item,.timeline-item:nth-child(even){width:100%;margin-left:0;padding:0 0 0 40px;text-align:left;}
  .timeline-dot,.timeline-item:nth-child(even) .timeline-dot{left:3px;right:auto;}
  .ticket-card.featured{transform:none;border-color:rgba(50,224,255,.4);box-shadow:0 0 40px rgba(45,107,255,.2);}
  .ticket-card.featured:hover{transform:translateY(-4px);}
  .form-row{flex-direction:column;}
  .form-row .btn{width:100%;}
  .footer-grid{flex-direction:column;gap:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:480px){
  .hero h1{font-size:28px;}
  .section-title{font-size:24px;}
  .btn{padding:0 24px;font-size:14px;}
  .speaker-card{padding:24px 16px;}
}

/* roulang page: category1 */
:root {
  --bg-primary: #05070F;
  --bg-secondary: #0A0F1E;
  --primary: #2D6BFF;
  --accent: #32E0FF;
  --accent-gold: #FFB020;
  --text-main: #FFFFFF;
  --text-secondary: #A6B0C3;
  --text-muted: #5A6A85;
  --border-line: rgba(255,255,255,0.08);
  --card-bg: rgba(255,255,255,0.04);
  --card-border: rgba(255,255,255,0.10);
  --radius-card: 16px;
  --radius-btn: 10px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
  --shadow-hover: 0 20px 48px rgba(0,0,0,0.45);
  --transition-base: all 0.3s ease;
  --container-width: 1200px;
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-num: "DIN Alternate", "Inter", sans-serif;
}
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-main);
  font-size: 15px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition-base); }
ul,ol { list-style: none; }
button,input,select,textarea { font-family: inherit; font-size: inherit; }
.container { max-width: var(--container-width); margin: 0 auto; padding: 0 24px; position: relative; z-index: 2; }
.site-header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  height: 76px; display: flex; align-items: center;
  background: transparent; transition: background 0.4s ease, box-shadow 0.4s ease;
}
.site-header.scrolled {
  background: rgba(5,7,15,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.header-inner {
  max-width: var(--container-width); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  width: 100%; height: 100%;
}
.brand-logo { display: flex; align-items: center; gap: 10px; }
.brand-name { font-size: 20px; font-weight: 800; letter-spacing: 0.02em; color: #fff; }
.brand-divider { width: 1px; height: 18px; background: rgba(255,255,255,0.25); }
.brand-sub { font-size: 11px; color: rgba(255,255,255,0.5); letter-spacing: 0.12em; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-link {
  font-size: 15px; color: rgba(255,255,255,0.85);
  padding: 8px 0; position: relative; font-weight: 500;
}
.nav-link::after {
  content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 0; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 0.3s ease;
}
.nav-link:hover { color: #fff; }
.nav-link:hover::after { width: 100%; }
.nav-link.active { color: #fff; }
.nav-link.active::after { width: 100%; }
.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; flex-direction: column; gap: 5px; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: var(--transition-base); }
.mobile-menu {
  display: none; position: fixed; top: 76px; left: 0; width: 100%;
  background: rgba(5,7,15,0.95); backdrop-filter: blur(20px);
  padding: 24px; z-index: 999; border-bottom: 1px solid var(--border-line);
}
.mobile-menu.open { display: block; }
.mobile-menu a { display: block; padding: 14px 0; font-size: 18px; border-bottom: 1px solid rgba(255,255,255,0.06); }
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a.active { color: var(--accent); }
.page-hero {
  margin-top: 76px; min-height: 380px; display: flex; align-items: center; position: relative;
  background: linear-gradient(135deg, #05070F 20%, rgba(10,15,30,0.9) 100%);
  background-image: url('/assets/images/backpic/back-2.webp');
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  overflow: hidden;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.page-hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(5,7,15,0.92) 0%, rgba(5,7,15,0.75) 50%, rgba(5,7,15,0.55) 100%);
}
.page-hero::after {
  content: ''; position: absolute; right: -80px; top: -80px;
  width: 380px; height: 380px; border-radius: 50%;
  background: radial-gradient(circle, rgba(50,224,255,0.18) 0%, transparent 65%);
  pointer-events: none;
}
.hero-content { display: flex; align-items: center; justify-content: space-between; gap: 40px; max-width: var(--container-width); margin: 0 auto; padding: 0 24px; width: 100%; }
.hero-text { flex: 1; max-width: 60%; }
.hero-text h1 { font-size: 42px; font-weight: 800; line-height: 1.3; margin-bottom: 16px; letter-spacing: 0.02em; }
.hero-text h1 .highlight { color: var(--accent); }
.hero-text p { font-size: 16px; color: var(--text-secondary); max-width: 520px; }
.hero-thumb { flex: 0 0 32%; max-width: 360px; }
.hero-thumb img { border-radius: var(--radius-card); box-shadow: var(--shadow-card); border: 1px solid rgba(255,255,255,0.1); }
.section-block { padding: 100px 0; position: relative; }
.section-title-wrap { margin-bottom: 48px; }
.section-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; letter-spacing: 0.08em; font-weight: 600;
  color: var(--accent); margin-bottom: 12px;
  text-transform: uppercase;
}
.section-tag::before { content: ''; width: 24px; height: 1px; background: var(--accent); }
.section-title { font-size: 34px; font-weight: 800; line-height: 1.3; margin-bottom: 14px; }
.section-sub { font-size: 15px; color: var(--text-secondary); max-width: 640px; line-height: 1.8; }
.grid-article-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.article-card {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius-card); overflow: hidden; transition: var(--transition-base);
  box-shadow: var(--shadow-card); display: flex; gap: 20px; padding: 20px;
}
.article-card:hover { transform: translateY(-4px); border-color: rgba(255,255,255,0.18); box-shadow: var(--shadow-hover); }
.article-card-img { flex: 0 0 100px; height: 100px; border-radius: 12px; overflow: hidden; background: var(--bg-secondary); }
.article-card-img img { width: 100%; height: 100%; object-fit: cover; }
.article-card-body { flex: 1; display: flex; flex-direction: column; }
.article-card-tag {
  display: inline-flex; align-items: center; padding: 2px 12px;
  border-radius: 999px; font-size: 12px; font-weight: 600;
  background: rgba(45,107,255,0.18); color: var(--accent);
  margin-bottom: 8px; align-self: flex-start; letter-spacing: 0.03em;
}
.article-card-title { font-size: 17px; font-weight: 700; line-height: 1.5; margin-bottom: 6px; }
.article-card-sub { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }
.article-card-time { font-family: var(--font-num); font-size: 12px; color: var(--text-muted); margin-top: auto; padding-top: 8px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-item {
  background: var(--card-bg); border: 1px solid var(--card-border);
  border-radius: var(--radius-card); padding: 36px 28px; position: relative;
  overflow: hidden; transition: var(--transition-base);
  box-shadow: var(--shadow-card);
}
.feature-item:hover { transform: translateY(-6px); border-color: rgba(255,255,255,0.16); box-shadow: var(--shadow-hover); }
.feature-num {
  font-family: var(--font-num); font-size: 52px; font-weight: 800;
  color: rgba(255,255,255,0.06); line-height: 1; position: absolute; top: 16px; right: 20px;
  letter-spacing: -0.03em;
}
.feature-icon {
  width: 48px; height: 48px; border-radius: 12px;
  background: rgba(45,107,255,0.15); border: 1px solid rgba(50,224,255,0.25);
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px;
  color: var(--accent);
}
.feature-icon svg { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.feature-title { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.feature-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.8; }
.timeline-section { background: var(--bg-secondary); }
.timeline-wrap { max-width: 820px; margin: 0 auto; position: relative; padding: 20px 0; }
.timeline-wrap::before {
  content: ''; position: absolute; left: 50%; top: 0; bottom: 0;
  width: 1px; background: linear-gradient(180deg, transparent, rgba(50,224,255,0.45), rgba(45,107,255,0.45), transparent);
}
.timeline-item { display: flex; align-items: center; justify-content: flex-end; padding: 20px 0; position: relative; width: 100%; }
.timeline-item:nth-child(odd) { justify-content: flex-start; }
.timeline-item:nth-child(odd) .timeline-time { order: 2; text-align: left; padding: 0 0 0 64px; }
.timeline-item:nth-child(odd) .timeline-card { order: 1; text-align: right; padding: 0 64px 0 0; }
.timeline-item:nth-child(even) .timeline-time { order: 1; text-align: right; padding: 0 64px 0 0; }
.timeline-item:nth-child(even) .timeline-card { order: 2; text-align: left; padding: 0 0 0 64px; }
.timeline-dot {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 0 4px rgba(50,224,255,0.15), 0 0 20px rgba(50,224,255,0.5);
  z-index: 2;
}
.timeline-time { font-family: var(--font-num); font-size: 16px; font-weight: 700; color: var(--accent); flex: 1; }
.timeline-card { flex: 1; }
.timeline-card-inner {
  background: rgba(255,255,255,0.04); border: 1px solid var(--card-border);
  border-radius: 14px; padding: 20px 24px; display: inline-block; min-width: 220px;
  backdrop-filter: blur(10px);
  transition: var(--transition-base);
}
.timeline-card-inner:hover { border-color: rgba(255,255,255,0.18); box-shadow: var(--shadow-card); }
.timeline-card-title { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.timeline-card-loc { font-size: 13px; color: var(--text-secondary); display: flex; align-items: center; gap: 6px; }
.timeline-card-loc svg { width: 14px; height: 14px; stroke: var(--text-muted); fill: none; stroke-width: 1.8; }
.cta-banner {
  background: var(--bg-secondary); border-top: 1px solid var(--border-line);
  border-bottom: 1px solid var(--border-line); position: relative; overflow: hidden;
}
.cta-banner::before {
  content: ''; position: absolute; right: -120px; bottom: -120px;
  width: 420px; height: 420px; border-radius: 50%;
  background: radial-gradient(circle, rgba(50,224,255,0.15) 0%, transparent 65%);
  pointer-events: none;
}
.cta-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 40px;
  border-radius: 20px; border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.04); backdrop-filter: blur(16px);
  padding: 48px 56px; position: relative;
}
.cta-text h2 { font-size: 28px; font-weight: 800; margin-bottom: 8px; }
.cta-text p { color: var(--text-secondary); font-size: 15px; max-width: 460px; }
.cta-actions { display: flex; align-items: center; gap: 20px; flex-shrink: 0; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 48px; padding: 0 32px; border-radius: var(--radius-btn);
  font-size: 16px; font-weight: 600; border: none; cursor: pointer;
  transition: var(--transition-base); letter-spacing: 0.02em;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; box-shadow: 0 12px 40px rgba(45,107,255,0.45);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 56px rgba(50,224,255,0.55); filter: brightness(1.1); }
.btn-primary:active { transform: translateY(1px); box-shadow: 0 8px 24px rgba(45,107,255,0.4); }
.btn-outline {
  background: transparent; border: 1px solid rgba(255,255,255,0.3); color: #fff;
}
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.08); }
.site-footer { background: #04060C; border-top: 1px solid var(--border-line); padding: 60px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 40px; }
.footer-brand-title { font-size: 20px; font-weight: 800; margin-bottom: 12px; }
.footer-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.8; max-width: 300px; }
.footer-title { font-size: 14px; font-weight: 700; margin-bottom: 16px; color: #fff; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,0.65); }
.footer-links a:hover { color: #fff; }
.footer-links li:last-child { color: rgba(255,255,255,0.65); font-size: 14px; }
.footer-bottom {
  border-top: 1px solid var(--border-line); padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px; color: var(--text-muted);
}
.back-to-top {
  position: fixed; right: 32px; bottom: 32px; z-index: 99;
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.16);
  backdrop-filter: blur(12px); color: #fff; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition-base); opacity: 0; visibility: hidden;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: rgba(45,107,255,0.3); border-color: var(--accent); }
.back-to-top svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 2; }
@media (max-width: 1023px) {
  .section-block { padding: 72px 0; }
  .hero-content { gap: 28px; }
  .hero-text h1 { font-size: 36px; }
  .hero-thumb { flex-basis: 40%; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .timeline-item:nth-child(odd) .timeline-time,
  .timeline-item:nth-child(even) .timeline-time { padding: 0 0 0 56px; text-align: left; order: 2; }
  .timeline-item:nth-child(odd) .timeline-card,
  .timeline-item:nth-child(even) .timeline-card { padding: 0 56px 0 0; text-align: right; order: 1; }
  .timeline-item:nth-child(odd) { justify-content: flex-start; }
  .timeline-item:nth-child(even) { justify-content: flex-start; }
  .timeline-item:nth-child(odd) .timeline-card,
  .timeline-item:nth-child(even) .timeline-card { text-align: right; }
  .cta-inner { flex-direction: column; align-items: flex-start; padding: 40px 36px; }
  .cta-actions { width: 100%; }
}
@media (max-width: 767px) {
  .section-block { padding: 56px 0; }
  .header-inner { padding: 0 20px; }
  .nav-links { display: none; }
  .menu-toggle { display: flex; }
  .hero-content { flex-direction: column; text-align: left; padding: 48px 20px 56px; }
  .hero-text { max-width: 100%; }
  .hero-text h1 { font-size: 32px; }
  .hero-text p { font-size: 15px; }
  .hero-thumb { flex: 1; max-width: 100%; width: 100%; }
  .hero-thumb img { width: 100%; height: 200px; object-fit: cover; }
  .section-title { font-size: 24px; }
  .grid-article-list { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .timeline-wrap::before { left: 16px; }
  .timeline-dot { left: 16px; }
  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) { justify-content: flex-start; flex-direction: column; align-items: flex-start; padding-left: 40px; padding-right: 0; }
  .timeline-item:nth-child(odd) .timeline-time,
  .timeline-item:nth-child(even) .timeline-time { order: 1; padding: 0 0 6px 0; text-align: left; font-size: 14px; }
  .timeline-item:nth-child(odd) .timeline-card,
  .timeline-item:nth-child(even) .timeline-card { order: 2; padding: 0; text-align: left; width: 100%; }
  .timeline-card-inner { display: block; min-width: 0; }
  .timeline-item:nth-child(odd) .timeline-card { text-align: left; }
  .cta-inner { padding: 32px 24px; }
  .cta-text h2 { font-size: 24px; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; min-height: 44px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .page-hero { min-height: 320px; }
  .hero-text h1 { font-size: 28px; }
}

/* roulang page: article */
:root{
  --bg-root:#05070F;
  --bg-secondary:#0A0F1E;
  --bg-deep:#04060C;
  --primary:#2D6BFF;
  --accent:#32E0FF;
  --gold:#FFB020;
  --text-main:#FFFFFF;
  --text-secondary:#A6B0C3;
  --text-muted:#5A6A85;
  --border-line:rgba(255,255,255,0.08);
  --card-bg:rgba(255,255,255,0.04);
  --card-border:rgba(255,255,255,0.10);
  --radius-card:16px;
  --radius-btn:10px;
  --radius-tag:999px;
  --shadow-card:0 8px 32px rgba(0,0,0,0.25);
  --shadow-hover:0 20px 48px rgba(0,0,0,0.45);
  --font-main:'PingFang SC','Microsoft YaHei','Noto Sans SC',sans-serif;
  --font-num:'DIN Alternate',Inter,sans-serif;
  --transition:all .3s ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg-root);
  color:var(--text-main);
  font-family:var(--font-main);
  font-size:15px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:var(--transition)}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul,ol{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px;width:100%}
.row{max-width:1200px;margin:0 auto}
.columns{padding-left:12px;padding-right:12px}
.section-pad{padding:100px 0}
.section-title{font-size:34px;font-weight:800;line-height:1.3;margin-bottom:12px;letter-spacing:1px}
.section-sub{font-size:15px;color:var(--text-secondary);max-width:640px;line-height:1.8;margin-bottom:40px}
.section-head{margin-bottom:48px}
.section-head.center{text-align:center}
.section-head.center .section-sub{margin-left:auto;margin-right:auto}

/* ===== 导航 ===== */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:999;
  height:76px;
  background:transparent;
  transition:background .4s ease,box-shadow .4s ease,border-color .4s ease;
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(5,7,15,0.88);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,0.08);
}
.nav-container{
  max-width:1200px;margin:0 auto;padding:0 24px;height:76px;
  display:flex;align-items:center;justify-content:space-between;
}
.nav-logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.logo-main{
  font-size:22px;font-weight:800;letter-spacing:1px;
  background:linear-gradient(135deg,#fff 30%,#32E0FF 100%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.logo-sub{
  font-size:11px;color:rgba(255,255,255,0.5);
  padding-left:12px;border-left:1px solid rgba(255,255,255,0.15);
  letter-spacing:.12em;font-weight:300;
  line-height:1.2;
}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-link{
  font-size:14px;font-weight:500;color:rgba(255,255,255,0.85);
  padding:6px 2px;position:relative;letter-spacing:.02em;
}
.nav-link::after{
  content:'';position:absolute;bottom:-2px;left:0;
  width:0;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  border-radius:2px;
  transition:width .3s ease;
}
.nav-link:hover{color:#fff}
.nav-link:hover::after{width:100%}
.nav-link.active{color:#fff}
.nav-link.active::after{width:20px}
.nav-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;border-radius:8px;font-size:20px;color:#fff}
@media screen and (max-width:767px){
  .nav-toggle{display:flex}
  .nav-links{
    position:fixed;top:0;right:0;bottom:0;
    width:280px;max-width:85vw;
    background:rgba(5,7,15,0.96);
    backdrop-filter:blur(24px);
    border-left:1px solid rgba(255,255,255,0.08);
    flex-direction:column;
    align-items:flex-start;
    justify-content:flex-start;
    gap:8px;
    padding:100px 32px 40px;
    transform:translateX(100%);
    transition:transform .4s ease;
    z-index:998;
  }
  .nav-links.open{transform:translateX(0)}
  .nav-link{font-size:18px;padding:12px 0;width:100%;border-bottom:1px solid rgba(255,255,255,0.06)}
}

/* ===== 文章头部面板 ===== */
.article-hero{
  position:relative;
  padding:140px 0 60px;
  background:
    linear-gradient(135deg,rgba(5,7,15,0.92) 0%,rgba(5,7,15,0.75) 60%,rgba(10,15,30,0.6) 100%),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-bottom:1px solid var(--border-line);
}
.article-hero::after{
  content:'';position:absolute;left:0;right:0;bottom:0;height:120px;
  background:linear-gradient(180deg,transparent,var(--bg-root));
  pointer-events:none;
}
.article-hero .container{position:relative;z-index:2}
.article-kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.12em;
  color:var(--accent);
  text-transform:uppercase;
  padding:6px 16px;
  border:1px solid rgba(50,224,255,0.3);
  border-radius:999px;
  background:rgba(50,224,255,0.06);
  margin-bottom:24px;
}
.article-kicker i{font-size:11px}
.article-h1{
  font-size:56px;font-weight:800;line-height:1.25;
  letter-spacing:1px;
  max-width:900px;
  margin-bottom:28px;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:16px;
  font-size:14px;color:var(--text-secondary);
}
.meta-badge{
  display:inline-block;
  padding:5px 14px;
  border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.06em;
  background:rgba(45,107,255,0.18);
  color:var(--accent);
  border:1px solid rgba(45,107,255,0.3);
}
.meta-separator{color:rgba(255,255,255,0.2)}
.meta-time i{margin-right:5px;font-size:12px}
@media screen and (max-width:1023px){
  .article-h1{font-size:42px}
}
@media screen and (max-width:767px){
  .article-hero{padding:120px 0 40px}
  .article-h1{font-size:32px}
  .article-meta{flex-wrap:wrap;gap:10px}
}

/* ===== 面包屑 ===== */
.breadcrumb-bar{
  padding:18px 0;
  background:var(--bg-secondary);
  border-bottom:1px solid var(--border-line);
}
.breadcrumb{
  font-size:13px;color:var(--text-muted);
  display:flex;align-items:center;flex-wrap:wrap;gap:8px;
}
.breadcrumb a{color:var(--text-secondary)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:rgba(255,255,255,0.2)}
.breadcrumb .current{color:#fff}

/* ===== 正文主区 ===== */
.article-main-section{padding:60px 0 80px;background:var(--bg-root)}
.article-layout{display:flex;gap:48px}
.article-content-wrap{flex:0 0 72%;max-width:72%}
.article-sidebar{flex:0 0 28%;max-width:28%}
@media(max-width:1023px){
  .article-layout{flex-direction:column;gap:40px}
  .article-content-wrap,.article-sidebar{flex:1 1 100%;max-width:100%}
}

/* 文章正文排版 */
.article-body{
  font-size:16px;line-height:1.9;color:var(--text-secondary);
}
.article-body h2{
  font-size:26px;font-weight:700;color:#fff;
  padding-left:16px;border-left:4px solid var(--primary);
  margin:44px 0 20px;line-height:1.4;
}
.article-body h3{
  font-size:20px;font-weight:600;color:#fff;
  margin:32px 0 16px;
}
.article-body p{margin-bottom:22px}
.article-body strong{color:#fff;font-weight:600}
.article-body a{color:var(--accent);border-bottom:1px solid rgba(50,224,255,0.3)}
.article-body a:hover{border-bottom-color:var(--accent)}
.article-body ul{margin:0 0 22px;padding-left:8px}
.article-body ul li{
  position:relative;padding-left:22px;margin-bottom:10px;
}
.article-body ul li::before{
  content:'';position:absolute;left:0;top:12px;
  width:8px;height:8px;border-radius:2px;
  background:var(--accent);
  transform:rotate(45deg);
}
.article-body ol{margin:0 0 22px;padding-left:8px;counter-reset:list}
.article-body ol li{
  position:relative;padding-left:30px;margin-bottom:10px;counter-increment:list;
}
.article-body ol li::before{
  content:counter(list) '.';
  position:absolute;left:0;top:0;
  font-family:var(--font-num);
  color:var(--accent);font-weight:600;font-size:15px;
}
.article-body img{
  border-radius:12px;box-shadow:var(--shadow-card);
  margin:32px 0;max-width:100%;height:auto;
}
.article-body blockquote{
  border-left:4px solid var(--accent);
  background:rgba(50,224,255,0.05);
  padding:18px 24px;
  border-radius:0 12px 12px 0;
  color: rgba(255,255,255,0.85);
  font-size:16px;
  margin:28px 0;
}
.article-body blockquote p{margin:0 0 8px}
.article-body blockquote p:last-child{margin:0}
.article-body table{
  width:100%;border-collapse:collapse;margin:28px 0;
  background:rgba(255,255,255,0.03);
  border-radius:12px;overflow:hidden;
  font-size:14px;
}
.article-body table th{
  background:rgba(45,107,255,0.15);
  color:#fff;font-weight:600;
  padding:14px 18px;text-align:left;
}
.article-body table td{
  padding:12px 18px;color:var(--text-secondary);
  border-top:1px solid var(--border-line);
}
.article-body code{
  background:rgba(255,255,255,0.08);
  padding:2px 8px;border-radius:6px;
  font-size:14px;font-family:'SF Mono',Consolas,monospace;color:var(--accent);
}
.article-body pre{
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.08);
  border-radius:12px;
  padding:20px;overflow-x:auto;
  margin:28px 0;
}
.article-body pre code{background:transparent;padding:0;color:#e8eaf0}
.article-body hr{
  border:none;border-top:1px solid var(--border-line);margin:40px 0;
}

/* ===== 侧栏 ===== */
.article-sidebar .card{
  background:var(--card-bg);
  border:1px solid var(--card-border);
  border-radius:var(--radius-card);
  padding:24px;
  margin-bottom:24px;
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(12px);
}
.article-sidebar .card h3{
  font-size:16px;font-weight:600;color:#fff;
  margin-bottom:16px;
  padding-bottom:12px;
  border-bottom:1px solid var(--border-line);
  display:flex;align-items:center;gap:8px;
}
.article-sidebar .card h3 i{color:var(--accent);font-size:14px}
.author-card{text-align:center;padding:32px 24px}
.author-avatar{
  width:80px;height:80px;border-radius:50%;
  overflow:hidden;margin:0 auto 16px;
  border:2px solid rgba(50,224,255,0.4);
  box-shadow:0 0 24px rgba(50,224,255,0.2);
}
.author-avatar img{width:100%;height:100%;object-fit:cover}
.author-name{font-size:18px;font-weight:600;color:#fff;margin-bottom:6px}
.author-desc{font-size:13px;color:var(--text-muted);line-height:1.6}
.sidebar-tags{display:flex;flex-wrap:wrap;gap:8px}
.sidebar-tags a{
  font-size:12px;color:var(--text-secondary);
  padding:5px 14px;border-radius:999px;
  background:rgba(255,255,255,0.05);
  border:1px solid rgba(255,255,255,0.1);
  transition:var(--transition);
}
.sidebar-tags a:hover{
  color:#fff;border-color:rgba(50,224,255,0.4);
  background:rgba(50,224,255,0.08);
}
.sidebar-related{min-height:160px}
.related-placeholder{
  font-size:13px;color:var(--text-muted);
  text-align:center;padding:28px 12px;
  background:rgba(255,255,255,0.02);
  border-radius:10px;
  border:1px dashed rgba(255,255,255,0.08);
}
.related-placeholder i{
  font-size:28px;color:var(--text-muted);
  margin-bottom:10px;display:block;
  opacity:.4;
}
.related-side-item{
  display:flex;align-items:center;gap:12px;
  padding:10px 0;
  border-bottom:1px solid rgba(255,255,255,0.04);
}
.related-side-item:last-child{border-bottom:none}
.related-side-dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--accent);
  flex-shrink:0;
  box-shadow:0 0 8px rgba(50,224,255,0.5);
}
.related-side-item span{
  font-size:13px;color:var(--text-secondary);
  line-height:1.5;
}
.related-side-item:hover span{color:#fff}

/* ===== 文末操作区 ===== */
.article-pagination{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;margin:48px 0 0;
  padding:24px 0;
  border-top:1px solid var(--border-line);
  border-bottom:1px solid var(--border-line);
}
.page-btn{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:500;
  color:var(--text-secondary);
  padding:10px 24px;
  border:1px solid rgba(255,255,255,0.12);
  border-radius:10px;
  transition:var(--transition);
  min-height:44px;
}
.page-btn i{font-size:12px}
.page-btn:hover{
  color:#fff;border-color:rgba(255,255,255,0.3);
  background:rgba(255,255,255,0.06);
}
.page-btn.disabled{opacity:.35;cursor:not-allowed;pointer-events:none}
.page-btn.list-btn{
  color:var(--accent);
  border-color:rgba(50,224,255,0.3);
  background:rgba(50,224,255,0.05);
}
.page-btn.list-btn:hover{
  background:rgba(50,224,255,0.12);
  border-color:rgba(50,224,255,0.5);
}
@media(max-width:767px){
  .article-pagination{flex-wrap:wrap}
  .page-btn{flex:1;justify-content:center;text-align:center}
}

/* ===== 相关推荐 ===== */
.related-section{padding:80px 0 100px;background:var(--bg-secondary)}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:1023px){
  .related-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:639px){
  .related-grid{grid-template-columns:1fr}
}
.related-empty{
  grid-column:1/-1;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:80px 24px;text-align:center;
  background:var(--card-bg);
  border:1px dashed rgba(255,255,255,0.12);
  border-radius:var(--radius-card);
}
.related-empty i{
  font-size:40px;color:var(--text-muted);
  margin-bottom:16px;opacity:.4;
}
.related-empty p{
  font-size:15px;color:var(--text-secondary);
  line-height:1.8;
}

/* ===== CTA ===== */
.cta-section{
  position:relative;
  padding:80px 0;
  background:var(--bg-deep);
  overflow:hidden;
}
.cta-section::before{
  content:'';position:absolute;right:-120px;bottom:-120px;
  width:480px;height:480px;border-radius:50%;
  background:radial-gradient(circle,rgba(50,224,255,0.25),rgba(45,107,255,0.08) 50%,transparent 70%);
  pointer-events:none;
}
.cta-section::after{
  content:'';position:absolute;left:0;top:0;right:0;bottom:0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,0.02) 1px,transparent 1px);
  background-size:60px 60px;
  pointer-events:none;
}
.cta-inner{position:relative;z-index:2;text-align:center;max-width:640px;margin:0 auto}
.cta-inner h2{
  font-size:36px;font-weight:800;color:#fff;
  margin-bottom:16px;letter-spacing:1px;
}
.cta-inner p{
  font-size:16px;color:var(--text-secondary);
  margin-bottom:36px;line-height:1.8;
}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{
  display:inline-flex;align-items:center;gap:10px;
  height:48px;padding:0 32px;
  border-radius:10px;
  font-size:16px;font-weight:600;color:#fff;
  background:linear-gradient(135deg,#2D6BFF,#32E0FF);
  box-shadow:0 12px 40px rgba(45,107,255,0.45);
  transition:var(--transition);
  min-height:48px;
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 16px 56px rgba(50,224,255,0.55);
  filter:brightness(1.1);
}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{
  display:inline-flex;align-items:center;gap:10px;
  height:48px;padding:0 32px;
  border-radius:10px;
  font-size:16px;font-weight:500;color:#fff;
  border:1px solid rgba(255,255,255,0.3);
  background:transparent;
  transition:var(--transition);
  min-height:48px;
}
.btn-outline:hover{
  border-color:#fff;
  background:rgba(255,255,255,0.08);
}
.btn-outline:active{transform:translateY(1px)}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--accent);font-size:14px;font-weight:500;
  padding:8px 0;
}
.btn-ghost i{transition:transform .3s ease}
.btn-ghost:hover i{transform:translateX(4px)}
.cta-notice{
  margin-top:24px;
  font-size:13px;color:var(--text-muted);
}
.cta-notice a{color:var(--text-secondary)}
.cta-notice a:hover{color:var(--accent)}
@media(max-width:767px){
  .cta-inner h2{font-size:28px}
  .cta-actions{flex-direction:column}
  .btn-primary,.btn-outline{width:100%;justify-content:center}
}

/* ===== 内容未找到 ===== */
.not-found{
  padding:120px 24px;text-align:center;
}
.not-found-card{
  max-width:480px;margin:0 auto;
  background:var(--card-bg);
  border:1px solid var(--card-border);
  border-radius:var(--radius-card);
  padding:60px 40px;
  box-shadow:var(--shadow-card);
}
.not-found-card i{
  font-size:56px;color:var(--text-muted);opacity:.4;
  margin-bottom:20px;
}
.not-found-card h2{
  font-size:24px;font-weight:700;color:#fff;
  margin-bottom:12px;
}
.not-found-card p{
  font-size:15px;color:var(--text-secondary);
  margin-bottom:28px;
}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--bg-deep);
  border-top:1px solid var(--border-line);
  padding:80px 0 30px;
}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  margin-bottom:48px;
}
.footer-brand-title{
  font-size:22px;font-weight:800;color:#fff;
  letter-spacing:1px;margin-bottom:16px;
}
.footer-desc{
  font-size:14px;color:var(--text-secondary);
  line-height:1.8;
  max-width:280px;
}
.footer-title{
  font-size:16px;font-weight:600;color:#fff;
  margin-bottom:20px;
  position:relative;
  padding-bottom:10px;
}
.footer-title::after{
  content:'';position:absolute;left:0;bottom:0;
  width:24px;height:2px;
  background:linear-gradient(90deg,var(--primary),var(--accent));
  border-radius:2px;
}
.footer-links li{margin-bottom:10px}
.footer-links a{
  font-size:14px;color:rgba(255,255,255,0.65);
  transition:var(--transition);
}
.footer-links a:hover{color:#fff;padding-left:4px}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;
  flex-wrap:wrap;gap:12px;
  padding-top:28px;
  border-top:1px solid var(--border-line);
  font-size:13px;color:var(--text-muted);
}
@media(max-width:1023px){
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:639px){
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;text-align:center}
}

/* ===== 返回顶部 ===== */
.back-top-btn{
  position:fixed;bottom:32px;right:32px;z-index:999;
  width:48px;height:48px;border-radius:50%;
  background:rgba(255,255,255,0.06);
  border:1px solid rgba(255,255,255,0.15);
  backdrop-filter:blur(12px);
  display:flex;align-items:center;justify-content:center;
  color:var(--text-secondary);font-size:18px;
  opacity:0;visibility:hidden;
  transition:var(--transition);
}
.back-top-btn.show{opacity:1;visibility:visible}
.back-top-btn:hover{
  color:#fff;border-color:rgba(50,224,255,0.4);
  box-shadow:0 0 24px rgba(50,224,255,0.2);
}

/* ===== 通用 ===== */
.glass-card{
  background:var(--card-bg);
  border:1px solid var(--card-border);
  border-radius:var(--radius-card);
  backdrop-filter:blur(20px);
  box-shadow:var(--shadow-card);
}
.row {max-width: 1200px;}

/* roulang page: category2 */
:root {
    --bg-deep: #05070F;
    --bg-panel: #0A0F1E;
    --primary: #2D6BFF;
    --accent: #32E0FF;
    --gold: #FFB020;
    --text-main: #FFFFFF;
    --text-sub: #A6B0C3;
    --text-dim: #5A6A85;
    --line: rgba(255, 255, 255, 0.08);
    --card-bg: rgba(255, 255, 255, 0.04);
    --card-border: rgba(255, 255, 255, 0.10);
    --radius-card: 16px;
    --radius-btn: 10px;
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.25);
    --shadow-hover: 0 20px 48px rgba(0, 0, 0, 0.45);
    --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --font-num: "DIN Alternate", "Inter", "Helvetica Neue", sans-serif;
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    padding: 0;
    background: var(--bg-deep);
    color: var(--text-main);
    font-family: var(--font-main);
    font-size: 15px;
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
  }

  body.no-scroll {
    overflow: hidden;
  }

  a {
    color: inherit;
    text-decoration: none;
    transition: color .3s ease, opacity .3s ease, border-color .3s ease, background .3s ease;
  }

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

  ul,
  ol {
    list-style: none;
    margin: 0;
    padding: 0;
  }

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

  .row {
    max-width: 1200px;
  }

  .columns {
    padding: 0 12px;
  }

  h1,
  h2,
  h3,
  h4,
  p {
    margin: 0;
  }

  /* ===== Header ===== */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: 76px;
    background: transparent;
    border-bottom: 1px solid transparent;
    transition: background .35s ease, border-color .35s ease, box-shadow .35s ease;
  }

  .site-header.scrolled {
    background: rgba(5, 7, 15, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
  }

  .header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .brand {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
  }

  .brand-name {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: .02em;
    color: #fff;
    line-height: 1.2;
  }

  .brand-divider {
    width: 1px;
    height: 16px;
    background: rgba(255, 255, 255, 0.25);
  }

  .brand-sub {
    font-size: 11px;
    letter-spacing: .08em;
    color: #fff;
    opacity: .5;
  }

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

  .nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    font-size: 15px;
    color: rgba(255, 255, 255, 0.85);
    padding: 8px 2px;
    transition: color .3s ease;
  }

  .nav-link:hover {
    color: #fff;
  }

  .nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 20px;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, #2D6BFF, #32E0FF);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .3s ease;
  }

  .nav-link:hover::after {
    transform: scaleX(1);
  }

  .nav-link.active {
    color: #fff;
  }

  .nav-link.active::after {
    transform: scaleX(1);
  }

  .menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 0;
    background: transparent;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
    padding: 0;
  }

  .menu-toggle span {
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: transform .3s ease, opacity .3s ease;
  }

  .menu-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .menu-toggle.open span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* ===== Buttons ===== */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 32px;
    border-radius: var(--radius-btn);
    background: linear-gradient(135deg, #2D6BFF, #32E0FF);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    font-family: var(--font-main);
    border: 0;
    cursor: pointer;
    box-shadow: 0 12px 40px rgba(45, 107, 255, 0.45);
    transition: transform .3s ease, box-shadow .3s ease, filter .3s ease;
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 56px rgba(50, 224, 255, 0.55);
    filter: brightness(1.08);
  }

  .btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 8px 28px rgba(45, 107, 255, 0.35);
  }

  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 32px;
    border-radius: var(--radius-btn);
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    font-size: 16px;
    font-family: var(--font-main);
    cursor: pointer;
    transition: border-color .3s ease, background .3s ease, transform .3s ease;
  }

  .btn-ghost:hover {
    border-color: #fff;
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
  }

  /* ===== Page Hero ===== */
  .page-hero {
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    min-height: 340px;
    padding: 140px 0 72px;
    background: var(--bg-panel);
  }

  .page-hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    background-size: cover;
    background-position: center;
    opacity: .32;
  }

  .page-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background-image:
      linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.95), transparent);
    -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.95), transparent);
  }

  .page-hero-inner {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 760px;
  }

  .page-hero-title {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 18px;
    letter-spacing: .01em;
  }

  .page-hero-sub {
    font-size: 18px;
    color: var(--text-sub);
    margin-bottom: 28px;
    max-width: 560px;
    line-height: 1.7;
  }

  .page-hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
  }

  .hero-tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    font-size: 12px;
    color: var(--text-sub);
    letter-spacing: .08em;
  }

  /* ===== Sections ===== */
  section {
    padding: 100px 0;
  }

  .section-head {
    max-width: 760px;
    margin-bottom: 48px;
  }

  .section-head h2 {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 12px;
  }

  .section-head p {
    color: var(--text-sub);
    font-size: 15px;
    line-height: 1.8;
  }

  .section-overline {
    display: block;
    color: var(--accent);
    font-size: 12px;
    letter-spacing: .12em;
    text-transform: uppercase;
    margin-bottom: 10px;
  }

  /* ===== Flow Guide ===== */
  .guide-flow {
    background: var(--bg-panel);
  }

  .guide-flow-list {
    padding: 0;
  }

  .flow-item {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 28px 8px;
    border-bottom: 1px solid var(--line);
    transition: background .3s ease, padding-left .3s ease;
  }

  .flow-item:last-child {
    border-bottom: 0;
  }

  .flow-item:hover {
    background: rgba(255, 255, 255, 0.02);
    padding-left: 16px;
  }

  .flow-step {
    flex-shrink: 0;
    width: 96px;
    font-family: var(--font-num);
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: .04em;
    line-height: 1;
  }

  .flow-step-sub {
    display: block;
    font-family: var(--font-main);
    font-size: 12px;
    color: var(--text-dim);
    letter-spacing: .1em;
    margin-top: 4px;
    font-weight: 400;
  }

  .flow-text {
    flex: 1;
  }

  .flow-text h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 6px;
    line-height: 1.4;
  }

  .flow-text p {
    font-size: 15px;
    color: var(--text-sub);
    max-width: 720px;
    line-height: 1.8;
  }

  .flow-arrow {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--text-sub);
    font-size: 18px;
    transition: all .3s ease;
  }

  .flow-item:hover .flow-arrow {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    transform: translateX(4px);
    box-shadow: 0 6px 20px rgba(45, 107, 255, 0.4);
  }

  /* ===== Media Panel ===== */
  .guide-media {
    background: var(--bg-deep);
  }

  .guide-media-panel {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-card);
    aspect-ratio: 16 / 9;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-card);
  }

  .guide-media-panel img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.02);
    transition: transform .6s ease;
  }

  .guide-media-panel:hover img {
    transform: scale(1.05);
  }

  .guide-media-overlay {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    padding: 48px;
    background: linear-gradient(to top, rgba(5, 7, 15, 0.94) 0%, rgba(5, 7, 15, 0.55) 58%, transparent 100%);
  }

  .guide-media-overlay h2 {
    font-size: 26px;
    font-weight: 800;
    margin-bottom: 10px;
    line-height: 1.3;
  }

  .guide-media-overlay p {
    color: var(--text-sub);
    max-width: 680px;
    font-size: 15px;
    line-height: 1.8;
  }

  /* ===== Compare ===== */
  .guide-compare {
    background: var(--bg-panel);
  }

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

  .compare-media img {
    width: 100%;
    height: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    transition: transform .6s ease;
  }

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

  .compare-content {
    padding-left: 24px;
  }

  .compare-content h2 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.3;
  }

  .compare-content > p {
    color: var(--text-sub);
    font-size: 15px;
    line-height: 1.9;
    margin-bottom: 24px;
  }

  .compare-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
  }

  .compare-list li {
    position: relative;
    padding: 0 0 0 28px;
    color: var(--text-sub);
    font-size: 15px;
    line-height: 1.8;
  }

  .compare-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 6px;
    width: 16px;
    height: 16px;
    background: rgba(50, 224, 255, 0.14);
    border-radius: 5px;
  }

  .compare-list li::after {
    content: "";
    position: absolute;
    left: 4px;
    top: 10px;
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 1px;
    transform: rotate(45deg);
  }

  /* ===== FAQ ===== */
  .guide-faq {
    background: var(--bg-deep);
  }

  .faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .faq-item {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-card);
    overflow: hidden;
    transition: border-color .3s ease, box-shadow .3s ease;
  }

  .faq-item[open] {
    border-color: rgba(50, 224, 255, 0.35);
    box-shadow: var(--shadow-card);
  }

  .faq-item summary {
    list-style: none;
    cursor: pointer;
    padding: 20px 24px;
    font-size: 16px;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    transition: color .3s ease;
    line-height: 1.5;
  }

  .faq-item summary::-webkit-details-marker {
    display: none;
  }

  .faq-item summary::after {
    content: "+";
    font-size: 24px;
    color: var(--text-dim);
    line-height: 1;
    transition: transform .3s ease, color .3s ease;
  }

  .faq-item[open] summary::after {
    transform: rotate(45deg);
    color: var(--accent);
  }

  .faq-item[open] summary {
    color: var(--accent);
  }

  .faq-answer {
    padding: 16px 24px 20px;
    border-top: 1px solid var(--line);
    color: var(--text-sub);
    font-size: 14px;
    line-height: 1.9;
  }

  .faq-answer p {
    margin: 0;
  }

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

  .cta-strip::before {
    content: "";
    position: absolute;
    right: -120px;
    bottom: -120px;
    width: 440px;
    height: 440px;
    background: radial-gradient(circle, rgba(50, 224, 255, 0.18) 0%, rgba(50, 224, 255, 0) 70%);
    pointer-events: none;
  }

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

  .cta-strip h2 {
    font-size: 34px;
    font-weight: 800;
    margin-bottom: 10px;
    line-height: 1.3;
  }

  .cta-strip p {
    color: var(--text-sub);
    margin-bottom: 28px;
    max-width: 600px;
  }

  .cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
  }

  /* ===== Footer ===== */
  .site-footer {
    background: #04060C;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 64px 0 0;
  }

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

  .footer-brand-title {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 14px;
    line-height: 1.4;
  }

  .footer-desc {
    color: var(--text-dim);
    font-size: 14px;
    line-height: 1.8;
    margin: 0;
    max-width: 300px;
  }

  .footer-title {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 14px;
  }

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

  .footer-links a {
    color: rgba(255, 255, 255, 0.65);
    font-size: 14px;
    transition: color .3s ease;
  }

  .footer-links a:hover {
    color: #fff;
  }

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    color: var(--text-dim);
    font-size: 13px;
  }

  .footer-bottom a {
    color: var(--text-dim);
  }

  .footer-bottom a:hover {
    color: #fff;
  }

  .back-to-top {
    position: fixed;
    right: 28px;
    bottom: 28px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.14);
    color: var(--text-sub);
    font-size: 18px;
    z-index: 90;
    opacity: 0;
    pointer-events: none;
    transition: opacity .3s ease, background .3s ease, color .3s ease, transform .3s ease;
    text-decoration: none;
  }

  .back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
  }

  .back-to-top:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    transform: translateY(-3px);
  }

  /* ===== Responsive ===== */
  @media (max-width: 1023px) {
    section {
      padding: 72px 0;
    }

    .page-hero {
      padding: 130px 0 60px;
      min-height: 320px;
    }

    .page-hero-title {
      font-size: 40px;
    }

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

    .guide-media-panel {
      aspect-ratio: 16 / 10;
    }

    .compare-content {
      padding-left: 0;
      margin-top: 20px;
    }
  }

  @media (max-width: 767px) {
    .menu-toggle {
      display: flex;
    }

    .nav-links {
      position: fixed;
      top: 76px;
      left: 0;
      right: 0;
      background: rgba(5, 7, 15, 0.97);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      flex-direction: column;
      align-items: center;
      gap: 28px;
      padding: 36px 24px;
      transform: translateY(-16px);
      opacity: 0;
      pointer-events: none;
      transition: transform .3s ease, opacity .3s ease;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

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

    .nav-link {
      font-size: 17px;
    }

    .nav-link.active {
      padding: 0 16px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.08);
    }

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

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

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

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

    .flow-item {
      flex-wrap: wrap;
      gap: 12px;
      padding: 22px 4px;
    }

    .flow-step {
      width: 80px;
      font-size: 22px;
    }

    .flow-text h3 {
      font-size: 18px;
    }

    .flow-text p {
      font-size: 14px;
    }

    .flow-arrow {
      display: none;
    }

    .guide-media-overlay {
      padding: 24px 20px;
    }

    .guide-media-overlay h2 {
      font-size: 20px;
    }

    .guide-media-overlay p {
      font-size: 14px;
    }

    .guide-compare .compare-content {
      padding-left: 0;
      margin-top: 24px;
    }

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

    .faq-item summary {
      font-size: 15px;
      padding: 18px 20px;
    }

    .faq-answer {
      padding: 14px 20px 18px;
    }

    .cta-strip {
      padding: 64px 0;
    }

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

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

    .cta-actions .btn-primary,
    .cta-actions .btn-ghost {
      width: 100%;
    }

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 28px;
    }

    .footer-bottom {
      flex-direction: column;
      align-items: flex-start;
    }

    .back-to-top {
      right: 16px;
      bottom: 16px;
      width: 40px;
      height: 40px;
    }
  }

  @media (max-width: 520px) {
    section {
      padding: 56px 0;
    }

    .page-hero-title {
      font-size: 28px;
    }

    .page-hero-tags {
      gap: 8px;
    }

    .hero-tag {
      font-size: 11px;
      padding: 5px 12px;
    }

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

    .flow-step {
      width: 100%;
    }

    .flow-text h3 {
      font-size: 17px;
    }

    .cta-strip h2 {
      font-size: 22px;
    }
  }