/* roulang page: index */
:root{
  --bg-primary:#0a0e17;--bg-secondary:#111a2a;--bg-card:#161f30;--bg-elevated:#1c2740;
  --accent:#00d4ff;--accent-2:#ff6b9d;--accent-glow:rgba(0,212,255,.35);
  --text-primary:#e8edf4;--text-secondary:#9fb0c3;--text-muted:#6b7c94;
  --border:#1e2c44;--border-light:#2a3a55;
  --radius-sm:8px;--radius-md:16px;--radius-lg:24px;
  --shadow-sm:0 2px 12px rgba(0,0,0,.35);--shadow-md:0 10px 30px rgba(0,0,0,.45);--shadow-lg:0 24px 60px rgba(0,0,0,.55);
  --space-section:96px;--space-section-sm:64px;
  --font-main:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font-main);background:var(--bg-primary);color:var(--text-primary);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit;transition:color .25s ease}
button{border:none;background:none;cursor:pointer;font-family:inherit}
input,textarea{font-family:inherit}
ul,ol{list-style:none}

.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:var(--space-section) 0}
.section-sm{padding:var(--space-section-sm) 0}
.section-label{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:2px;text-transform:uppercase;color:var(--accent);background:rgba(0,212,255,.08);border:1px solid rgba(0,212,255,.2);border-radius:100px;padding:6px 18px;margin-bottom:20px}
.section-title{font-size:38px;font-weight:800;line-height:1.25;letter-spacing:-.5px;margin-bottom:16px}
.section-title span{color:var(--accent);text-shadow:0 0 24px var(--accent-glow)}
.section-desc{color:var(--text-secondary);font-size:16px;line-height:1.8;max-width:640px;margin-bottom:40px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:14px 32px;border-radius:100px;font-weight:600;font-size:15px;letter-spacing:.5px;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}
.btn-primary{background:linear-gradient(135deg,var(--accent),#00a8ff);color:#04121a;padding:15px 36px;box-shadow:0 4px 24px var(--accent-glow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 40px var(--accent-glow)}
.btn-outline{border:1px solid var(--border-light);color:var(--text-primary);background:rgba(255,255,255,.03)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}
.btn-outline i{font-size:14px}
.btn-lg{padding:18px 44px;font-size:16px}
.btn-block{display:flex;width:100%}

.text-center{text-align:center}
.text-accent{color:var(--accent)}
.glow-text{text-shadow:0 0 30px var(--accent-glow)}

/* ===== Header / Nav ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(10,14,23,.92);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);transition:all .4s ease}
.site-header.scrolled{box-shadow:var(--shadow-md);background:rgba(10,14,23,.97)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:12px;font-size:20px;font-weight:800;color:var(--text-primary);letter-spacing:.5px}
.logo-icon{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--accent),#0078ff);display:flex;align-items:center;justify-content:center;font-size:18px;color:#04121a;box-shadow:0 0 20px var(--accent-glow)}
.logo-text{font-weight:800;font-size:19px;background:linear-gradient(90deg,var(--text-primary),var(--accent));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.nav-menu{display:flex;align-items:center;gap:4px}
.nav-menu a{padding:10px 20px;border-radius:10px;font-size:15px;font-weight:500;color:var(--text-secondary);transition:all .25s}
.nav-menu a:hover{color:var(--text-primary);background:rgba(255,255,255,.04)}
.nav-menu a.active{color:var(--accent);background:rgba(0,212,255,.08);text-shadow:0 0 16px var(--accent-glow);position:relative}
.nav-menu a.active::after{content:'';position:absolute;bottom:2px;left:50%;transform:translateX(-50%);width:20px;height:2px;background:var(--accent);border-radius:2px;box-shadow:0 0 8px var(--accent-glow)}
.nav-cta{margin-left:12px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:10px;background:var(--bg-card);border:1px solid var(--border);color:var(--text-primary);font-size:18px;align-items:center;justify-content:center;transition:all .3s}
.nav-toggle:hover{border-color:var(--accent)}
.badge{display:inline-flex;align-items:center;gap:6px;background:var(--accent);color:#04121a;font-size:12px;font-weight:700;padding:4px 12px;border-radius:100px;box-shadow:0 0 12px var(--accent-glow)}

/* ===== Hero ===== */
.hero{position:relative;padding:180px 0 120px;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;background-attachment:fixed;min-height:100vh;display:flex;align-items:center}
.hero::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(10,14,23,.97) 10%,rgba(10,14,23,.75) 50%,rgba(0,0,0,.5))}
.hero::after{content:'';position:absolute;bottom:0;left:0;right:0;height:80px;background:linear-gradient(to top,var(--bg-primary),transparent)}
.hero-inner{position:relative;z-index:2}
.hero-content{max-width:680px}
.hero-content .section-label{animation:fadeUp .8s ease .2s both}
.hero-title{font-size:56px;font-weight:900;line-height:1.15;letter-spacing:-1.5px;margin-bottom:20px;animation:fadeUp .8s ease .4s both}
.hero-title .highlight{color:var(--accent);text-shadow:0 0 40px var(--accent-glow)}
.hero-sub{font-size:18px;color:var(--text-secondary);line-height:1.8;margin-bottom:36px;animation:fadeUp .8s ease .6s both}
.hero-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap;animation:fadeUp .8s ease .8s both}
.hero-stats{display:flex;gap:40px;margin-top:64px;animation:fadeUp .8s ease 1s both}
.hero-stat{display:flex;flex-direction:column;gap:4px}
.hero-stat .number{font-size:32px;font-weight:800;color:var(--text-primary);text-shadow:0 0 24px var(--accent-glow)}
.hero-stat .label{font-size:13px;color:var(--text-muted);letter-spacing:1px}

/* ===== Cards ===== */
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:32px;transition:all .35s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden;height:100%}
.card::before{content:'';position:absolute;top:0;left:0;width:100%;height:3px;background:linear-gradient(90deg,var(--accent),transparent);opacity:0;transition:opacity .35s}
.card:hover{transform:translateY(-8px);border-color:var(--border-light);box-shadow:var(--shadow-md)}
.card:hover::before{opacity:1}
.card-icon{width:56px;height:56px;border-radius:14px;background:rgba(0,212,255,.1);border:1px solid rgba(0,212,255,.2);display:flex;align-items:center;justify-content:center;font-size:22px;color:var(--accent);margin-bottom:24px;transition:all .35s}
.card:hover .card-icon{background:var(--accent);color:#04121a;box-shadow:0 0 24px var(--accent-glow)}
.card-title{font-size:20px;font-weight:700;margin-bottom:12px}
.card-desc{color:var(--text-secondary);font-size:15px;line-height:1.75}
.card-link{display:inline-flex;align-items:center;gap:8px;color:var(--accent);font-size:14px;font-weight:600;margin-top:20px}
.card-link i{transition:transform .3s}
.card-link:hover i{transform:translateX(4px)}

/* ===== Feature Grid ===== */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:36px 28px;text-align:center;transition:all .4s;position:relative;overflow:hidden}
.feature-item::after{content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);width:0;height:3px;background:var(--accent);transition:width .4s;box-shadow:0 0 12px var(--accent)}
.feature-item:hover{transform:translateY(-6px);border-color:rgba(0,212,255,.2);box-shadow:var(--shadow-md)}
.feature-item:hover::after{width:60%}
.feature-icon{width:64px;height:64px;border-radius:16px;margin:0 auto 20px;display:flex;align-items:center;justify-content:center;font-size:24px;color:var(--accent);background:rgba(0,212,255,.08)}
.feature-item h3{font-size:18px;font-weight:700;margin-bottom:10px}
.feature-item p{color:var(--text-secondary);font-size:14px;line-height:1.7}

/* ===== Category Cards ===== */
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.category-card{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--border);height:320px;cursor:pointer;transition:all .4s;display:block}
.category-card img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.category-card::after{content:'';position:absolute;inset:0;background:linear-gradient(to top,rgba(10,14,23,.95) 20%,rgba(10,14,23,.2))}
.category-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:var(--accent)}
.category-card:hover img{transform:scale(1.08)}
.category-card-info{position:absolute;bottom:0;left:0;right:0;padding:28px;z-index:2}
.category-card-info .category-icon{display:inline-flex;width:44px;height:44px;border-radius:10px;background:var(--accent);color:#04121a;align-items:center;justify-content:center;font-size:18px;margin-bottom:14px}
.category-card-info h3{font-size:22px;font-weight:800;margin-bottom:8px}
.category-card-info p{font-size:14px;color:var(--text-secondary);margin-bottom:14px}
.category-card-info .tag-chip{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--accent)}

/* ===== Post List ===== */
.post-list-section{background:var(--bg-secondary)}
.post-list{display:flex;flex-direction:column;gap:16px}
.post-item{display:flex;align-items:center;gap:20px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px 24px;transition:all .3s}
.post-item:hover{border-color:rgba(0,212,255,.2);box-shadow:var(--shadow-sm);transform:translateX(4px)}
.post-item .post-thumb{width:72px;height:72px;border-radius:10px;object-fit:cover;flex-shrink:0}
.post-item .post-body{flex:1;min-width:0}
.post-item .post-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--text-muted);margin-bottom:6px}
.post-item .post-meta .cat-pill{background:rgba(0,212,255,.1);color:var(--accent);padding:2px 10px;border-radius:100px;font-weight:600}
.post-item .post-meta .time{display:flex;align-items:center;gap:6px}
.post-item h3{font-size:17px;font-weight:600;margin-bottom:6px;line-height:1.4}
.post-item h3 a:hover{color:var(--accent)}
.post-item .post-excerpt{font-size:14px;color:var(--text-secondary);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-item .post-arrow{font-size:20px;color:var(--text-muted);transition:transform .3s}
.post-item:hover .post-arrow{color:var(--accent);transform:translateX(4px)}

/* ===== Stats ===== */
.stats-section{background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;background-attachment:fixed;position:relative;padding:100px 0}
.stats-section::before{content:'';position:absolute;inset:0;background:rgba(10,14,23,.9)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;}
.stat-card{text-align:center;position:relative;z-index:1;padding:24px}
.stat-num{font-size:46px;font-weight:900;color:var(--accent);text-shadow:0 0 30px var(--accent-glow);line-height:1.2}
.stat-label{font-size:14px;color:var(--text-secondary);margin-top:8px;letter-spacing:1px}

/* ===== Steps ===== */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;counter-reset:step}
.step-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:36px 28px;position:relative;transition:all .4s}
.step-item::before{counter-increment:step;content:counter(step);position:absolute;top:20px;right:24px;font-size:56px;font-weight:900;color:transparent;-webkit-text-stroke:2px rgba(0,212,255,.3);line-height:1;transition:all .4s}
.step-item:hover::before{-webkit-text-stroke:2px var(--accent);text-shadow:0 0 30px var(--accent-glow)}
.step-item:hover{transform:translateY(-6px);border-color:rgba(0,212,255,.2)}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:var(--accent);color:#04121a;font-weight:800;font-size:16px;margin-bottom:20px;box-shadow:0 0 16px var(--accent-glow)}
.step-item h3{font-size:18px;font-weight:700;margin-bottom:10px}
.step-item p{color:var(--text-secondary);font-size:14px;line-height:1.7}

/* ===== FAQ ===== */
.faq-section{background:var(--bg-secondary)}
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:28px;transition:all .3s;cursor:pointer}
.faq-item:hover{border-color:rgba(0,212,255,.3)}
.faq-q{display:flex;align-items:flex-start;gap:14px;font-size:16px;font-weight:700;margin-bottom:12px}
.faq-q .q-icon{display:inline-flex;width:28px;height:28px;border-radius:8px;background:rgba(0,212,255,.1);color:var(--accent);align-items:center;justify-content:center;font-size:14px;flex-shrink:0}
.faq-a{font-size:14px;color:var(--text-secondary);line-height:1.8;padding-left:42px}

/* ===== CTA ===== */
.cta-section{position:relative;padding:100px 0;background-image:url('/assets/images/backpic/back-3.png');background-size:cover;background-position:center;background-attachment:fixed;text-align:center}
.cta-section::before{content:'';position:absolute;inset:0;background:rgba(10,14,23,.92)}
.cta-inner{position:relative;z-index:1;max-width:700px;margin:0 auto}
.cta-title{font-size:40px;font-weight:900;margin-bottom:20px}
.cta-desc{font-size:17px;color:var(--text-secondary);margin-bottom:36px}

/* ===== Footer ===== */
.site-footer{background:var(--bg-primary);border-top:1px solid var(--border);padding:64px 0 32px}
.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:14px;color:var(--text-muted);line-height:1.8;max-width:300px}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:20px;color:var(--text-primary)}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--text-muted);transition:all .3s;display:inline-flex;align-items:center;gap:8px}
.footer-col a:hover{color:var(--accent)}
.footer-social{display:flex;gap:12px;margin-top:20px}
.footer-social a{width:40px;height:40px;border-radius:10px;background:var(--bg-card);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:16px;color:var(--text-secondary);transition:all .3s}
.footer-social a:hover{color:var(--accent);border-color:var(--accent);box-shadow:0 0 16px var(--accent-glow)}
.footer-bottom{border-top:1px solid var(--border);padding-top:28px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.footer-bottom p{font-size:13px;color:var(--text-muted)}
.footer-bottom .footer-links{display:flex;gap:20px}
.footer-bottom .footer-links a{font-size:13px;color:var(--text-muted)}
.footer-bottom .footer-links a:hover{color:var(--accent)}

/* ===== Mobile Menu ===== */
.mobile-menu{position:fixed;top:72px;left:0;right:0;background:rgba(10,14,23,.98);backdrop-filter:blur(20px);border-bottom:1px solid var(--border);padding:24px;display:none;z-index:999;flex-direction:column;gap:8px;max-height:calc(100vh - 72px);overflow-y:auto}
.mobile-menu.open{display:flex}
.mobile-menu a{padding:14px 16px;border-radius:10px;font-size:16px;color:var(--text-secondary);border:1px solid transparent}
.mobile-menu a.active{color:var(--accent);background:rgba(0,212,255,.08);border-color:rgba(0,212,255,.15)}
.mobile-menu .btn{width:100%;margin-top:8px;justify-content:center}

/* ===== Animations ===== */
@keyframes fadeUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulse-glow{0%,100%{opacity:1}50%{opacity:.6}}

/* ===== Responsive ===== */
@media screen and (max-width:1024px){
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .category-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .hero-title{font-size:44px}
  .section-title{font-size:32px}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media screen and (max-width:768px){
  .nav-menu{display:none}
  .nav-toggle{display:flex}
  .hero{padding:140px 0 80px}
  .hero-title{font-size:36px}
  .hero-sub{font-size:16px}
  .hero-stats{gap:24px;flex-wrap:wrap}
  .hero-stat .number{font-size:24px}
  .faq-grid{grid-template-columns:1fr}
  .section{padding:64px 0}
  .cta-title{font-size:32px}
  .container{padding:0 20px}
}
@media screen and (max-width:520px){
  .feature-grid{grid-template-columns:1fr}
  .category-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr}
  .steps-grid{grid-template-columns:1fr}
  .hero-title{font-size:28px}
  .hero-actions .btn{width:100%;justify-content:center}
  .post-item{flex-direction:row;padding:16px}
  .post-item .post-thumb{width:56px;height:56px}
  .footer-top{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  .section-title{font-size:28px}
  .btn-lg{padding:16px 32px}
  .hero{padding:120px 0 60px}
}

/* roulang page: category1 */
:root {
      --bg-dark: #0a0e17;
      --bg-deep: #070b12;
      --bg-surface: #111827;
      --bg-card: #161f30;
      --bg-elevated: #1c2638;
      --neon-primary: #00d4ff;
      --neon-secondary: #9d7bff;
      --neon-green: #00ffc8;
      --text-light: #e8edf4;
      --text-muted: #94a3b8;
      --text-dim: #5b6b81;
      --border-color: rgba(255, 255, 255, 0.07);
      --border-neon: rgba(0, 212, 255, 0.25);
      --radius-lg: 20px;
      --radius-md: 14px;
      --radius-sm: 10px;
      --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.35);
      --shadow-md: 0 12px 36px rgba(0, 0, 0, 0.4);
      --shadow-neon: 0 0 24px rgba(0, 212, 255, 0.25);
      --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #7b61ff 100%);
      --gradient-accent: linear-gradient(135deg, #00ffc8 0%, #00d4ff 100%);
      --transition: all 0.3s ease;
      --space-section: 90px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      background: var(--bg-dark);
      color: var(--text-light);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    ul,
    ol {
      list-style: none;
    }

    button,
    input,
    select,
    textarea {
      font-family: inherit;
      font-size: inherit;
      outline: none;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 28px;
    }

    .grid-container {
      max-width: 1280px;
    }

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

    .section-header {
      text-align: center;
      margin-bottom: 56px;
    }

    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: rgba(0, 212, 255, 0.08);
      border: 1px solid var(--border-neon);
      border-radius: 100px;
      color: var(--neon-primary);
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 1px;
      margin-bottom: 16px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: clamp(28px, 3.6vw, 44px);
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.5px;
      margin-bottom: 16px;
      color: var(--text-light);
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 640px;
      margin: 0 auto;
      line-height: 1.8;
    }

    .text-center {
      text-align: center;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      padding: 14px 32px;
      border-radius: 100px;
      font-size: 15px;
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: var(--transition);
      text-decoration: none;
      line-height: 1.4;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
    }

    .btn-primary {
      background: var(--gradient-primary);
      color: #fff;
    }

    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 30px rgba(0, 212, 255, 0.35);
      color: #fff;
    }

    .btn-outline {
      background: transparent;
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: var(--text-light);
    }

    .btn-outline:hover {
      border-color: var(--neon-primary);
      color: var(--neon-primary);
      box-shadow: 0 0 20px rgba(0, 212, 255, 0.15);
      transform: translateY(-2px);
    }

    .btn-lg {
      padding: 16px 40px;
      font-size: 16px;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 14px;
      border-radius: 100px;
      font-size: 12px;
      font-weight: 600;
      background: rgba(0, 212, 255, 0.1);
      color: var(--neon-primary);
      border: 1px solid rgba(0, 212, 255, 0.2);
    }

    .badge-purple {
      background: rgba(157, 123, 255, 0.12);
      color: var(--neon-secondary);
      border-color: rgba(157, 123, 255, 0.25);
    }

    .badge-green {
      background: rgba(0, 255, 200, 0.1);
      color: var(--neon-green);
      border-color: rgba(0, 255, 200, 0.2);
    }

    .card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      transition: var(--transition);
      padding: 24px;
      height: 100%;
    }

    .card:hover {
      transform: translateY(-6px);
      border-color: rgba(0, 212, 255, 0.3);
      box-shadow: var(--shadow-md), 0 0 30px rgba(0, 212, 255, 0.08);
    }

    /* Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 14, 23, 0.92);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    }

    .site-header .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
      gap: 20px;
    }

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

    .logo-icon {
      width: 42px;
      height: 42px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--gradient-primary);
      border-radius: 12px;
      color: #fff;
      font-size: 18px;
      box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
    }

    .logo-text {
      font-size: 20px;
      font-weight: 800;
      background: linear-gradient(135deg, #ffffff 0%, #00d4ff 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 1px;
      white-space: nowrap;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .nav-menu a {
      padding: 9px 18px;
      border-radius: 100px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      transition: var(--transition);
      white-space: nowrap;
    }

    .nav-menu a:hover {
      color: var(--neon-primary);
      background: rgba(0, 212, 255, 0.06);
    }

    .nav-menu a.active {
      color: var(--neon-primary);
      background: rgba(0, 212, 255, 0.1);
      border: 1px solid var(--border-neon);
      box-shadow: 0 0 16px rgba(0, 212, 255, 0.15);
      font-weight: 600;
    }

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .nav-cta .btn {
      padding: 9px 24px;
      font-size: 13px;
      box-shadow: none;
    }

    .nav-toggle {
      display: none;
      background: transparent;
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: var(--text-light);
      width: 44px;
      height: 44px;
      border-radius: 10px;
      font-size: 18px;
      cursor: pointer;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
    }

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

    .header-line {
      height: 2px;
      background: linear-gradient(90deg, transparent, var(--neon-primary), transparent);
      opacity: 0.6;
    }

    /* Banner */
    .page-banner {
      position: relative;
      padding: 110px 0 90px;
      background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
      overflow: hidden;
    }

    .page-banner::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(7, 11, 18, 0.92) 0%, rgba(10, 14, 23, 0.75) 50%, rgba(157, 123, 255, 0.2) 100%);
      z-index: 1;
    }

    .page-banner::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 120px;
      background: linear-gradient(to top, var(--bg-dark), transparent);
      z-index: 2;
    }

    .banner-content {
      position: relative;
      z-index: 3;
      max-width: 780px;
    }

    .banner-breadcrumb {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 22px;
      flex-wrap: wrap;
    }

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

    .banner-breadcrumb a:hover {
      color: var(--neon-primary);
    }

    .banner-breadcrumb i {
      font-size: 12px;
      color: var(--text-dim);
    }

    .banner-title {
      font-size: clamp(32px, 4.5vw, 54px);
      font-weight: 900;
      line-height: 1.2;
      margin-bottom: 18px;
      letter-spacing: -1px;
    }

    .banner-title .highlight {
      background: linear-gradient(135deg, #00d4ff, #9d7bff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .banner-desc {
      font-size: 17px;
      line-height: 1.8;
      color: var(--text-muted);
      max-width: 620px;
      margin-bottom: 32px;
    }

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

    .banner-neon-ring {
      position: absolute;
      right: -120px;
      top: 50%;
      transform: translateY(-50%);
      width: 420px;
      height: 420px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(0, 212, 255, 0.18) 0%, transparent 70%);
      filter: blur(30px);
      z-index: 1;
      pointer-events: none;
    }

    /* Overview */
    .overview-section {
      background: var(--bg-dark);
    }

    .overview-grid {
      display: grid;
      grid-template-columns: 1.05fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .overview-content .section-tag {
      margin-bottom: 14px;
    }

    .overview-content h2 {
      font-size: clamp(26px, 3.2vw, 38px);
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 20px;
    }

    .overview-content p {
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.9;
      margin-bottom: 16px;
    }

    .overview-list {
      margin-top: 24px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }

    .overview-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--text-light);
      padding: 10px 14px;
      background: var(--bg-surface);
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

    .overview-list li i {
      color: var(--neon-green);
      font-size: 14px;
    }

    .overview-media {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    .overview-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      min-height: 360px;
    }

    .overview-media::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, rgba(10, 14, 23, 0.5), transparent);
    }

    .overview-media .media-badge {
      position: absolute;
      bottom: 20px;
      left: 20px;
      z-index: 2;
      background: rgba(10, 14, 23, 0.7);
      backdrop-filter: blur(8px);
      padding: 12px 18px;
      border-radius: 12px;
      border: 1px solid var(--border-neon);
      color: var(--text-light);
      font-size: 13px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    /* Feature cards */
    .features-section {
      background: var(--bg-deep);
      position: relative;
      overflow: hidden;
    }

    .features-section::before {
      content: '';
      position: absolute;
      top: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 600px;
      height: 300px;
      background: radial-gradient(ellipse, rgba(0, 212, 255, 0.06), transparent);
      pointer-events: none;
    }

    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .feature-card {
      position: relative;
      overflow: hidden;
      padding: 0;
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      transition: var(--transition);
      height: 100%;
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-8px);
      border-color: rgba(0, 212, 255, 0.35);
      box-shadow: var(--shadow-md), 0 0 30px rgba(0, 212, 255, 0.1);
    }

    .feature-card-img {
      height: 200px;
      overflow: hidden;
      position: relative;
    }

    .feature-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

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

    .feature-card-img::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, var(--bg-surface) 0%, transparent 50%);
    }

    .feature-card-body {
      padding: 24px 24px 26px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

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

    .feature-card-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
      flex: 1;
      margin-bottom: 16px;
    }

    .feature-card-meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
      margin-top: auto;
    }

    .feature-card-link {
      color: var(--neon-primary);
      font-size: 13px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .feature-card-link:hover {
      color: var(--neon-green);
    }

    /* Steps */
    .steps-section {
      background: var(--bg-dark);
    }

    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
      counter-reset: step;
    }

    .step-card {
      position: relative;
      padding: 36px 28px;
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      transition: var(--transition);
      text-align: left;
    }

    .step-card:hover {
      border-color: rgba(0, 212, 255, 0.3);
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }

    .step-num {
      font-size: 48px;
      font-weight: 900;
      line-height: 1;
      background: linear-gradient(135deg, rgba(0, 212, 255, 0.3), rgba(157, 123, 255, 0.3));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 18px;
      display: inline-block;
    }

    .step-card h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-light);
    }

    .step-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    .step-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 28px;
      right: 28px;
      height: 2px;
      background: linear-gradient(90deg, var(--neon-primary), transparent);
      opacity: 0.4;
      border-radius: 2px;
    }

    /* Stats */
    .stats-section {
      background: var(--bg-deep);
      position: relative;
      padding: 70px 0;
    }

    .stats-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
      opacity: 0.15;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      position: relative;
      z-index: 1;
    }

    .stat-item {
      text-align: center;
      padding: 40px 20px;
      background: rgba(17, 24, 39, 0.8);
      backdrop-filter: blur(8px);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      transition: var(--transition);
    }

    .stat-item:hover {
      border-color: var(--border-neon);
      box-shadow: var(--shadow-neon);
    }

    .stat-num {
      font-size: 42px;
      font-weight: 900;
      background: var(--gradient-accent);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.2;
      margin-bottom: 8px;
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
      letter-spacing: 1px;
    }

    /* FAQ */
    .faq-section {
      background: var(--bg-dark);
    }

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

    .faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: rgba(0, 212, 255, 0.2);
    }

    .faq-item.active {
      border-color: rgba(0, 212, 255, 0.3);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    }

    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 22px 28px;
      background: transparent;
      border: none;
      cursor: pointer;
      text-align: left;
      color: var(--text-light);
      font-size: 16px;
      font-weight: 600;
      transition: var(--transition);
    }

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

    .faq-question i {
      font-size: 14px;
      color: var(--neon-primary);
      transition: transform 0.3s ease;
      flex-shrink: 0;
    }

    .faq-item.active .faq-question i {
      transform: rotate(180deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
    }

    .faq-answer-inner {
      padding: 0 28px 22px;
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.9;
      border-top: 1px solid var(--border-color);
      padding-top: 18px;
    }

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

    .cta-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
      opacity: 0.12;
    }

    .cta-box {
      position: relative;
      z-index: 1;
      max-width: 900px;
      margin: 0 auto;
      text-align: center;
      background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(157, 123, 255, 0.08));
      border: 1px solid rgba(0, 212, 255, 0.2);
      border-radius: var(--radius-lg);
      padding: 60px 40px;
      backdrop-filter: blur(10px);
      box-shadow: var(--shadow-md);
    }

    .cta-box h2 {
      font-size: clamp(26px, 3.4vw, 40px);
      font-weight: 800;
      margin-bottom: 14px;
    }

    .cta-box p {
      font-size: 16px;
      color: var(--text-muted);
      margin-bottom: 30px;
      max-width: 560px;
      margin-left: auto;
      margin-right: auto;
    }

    .cta-actions {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
    }

    /* Footer */
    .site-footer {
      background: var(--bg-deep);
      border-top: 1px solid var(--border-color);
      padding-top: 60px;
      position: relative;
    }

    .site-footer::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, var(--neon-primary), transparent);
      opacity: 0.4;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 44px;
      border-bottom: 1px solid var(--border-color);
    }

    .footer-brand .logo-text {
      font-size: 18px;
    }

    .footer-brand p {
      margin: 18px 0;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.8;
      max-width: 360px;
    }

    .footer-social {
      display: flex;
      gap: 10px;
    }

    .footer-social a {
      width: 38px;
      height: 38px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 10px;
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      color: var(--text-muted);
      font-size: 15px;
      transition: var(--transition);
    }

    .footer-social a:hover {
      background: rgba(0, 212, 255, 0.1);
      border-color: var(--border-neon);
      color: var(--neon-primary);
      transform: translateY(-3px);
    }

    .footer-col h4 {
      color: var(--text-light);
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 18px;
      letter-spacing: 0.5px;
      position: relative;
      padding-bottom: 10px;
    }

    .footer-col h4::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 28px;
      height: 2px;
      background: var(--gradient-primary);
      border-radius: 2px;
    }

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

    .footer-col ul a {
      color: var(--text-muted);
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: var(--transition);
    }

    .footer-col ul a i {
      font-size: 12px;
      color: var(--text-dim);
      transition: var(--transition);
    }

    .footer-col ul a:hover {
      color: var(--neon-primary);
      transform: translateX(4px);
    }

    .footer-col ul a:hover i {
      color: var(--neon-primary);
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 22px 0;
      flex-wrap: wrap;
      gap: 12px;
    }

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

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

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

    .footer-links a:hover {
      color: var(--neon-primary);
    }

    /* Responsive */
    @media (max-width: 1024px) {
      :root {
        --space-section: 70px;
      }

      .overview-grid {
        gap: 40px;
      }

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

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

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

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

    @media (max-width: 768px) {
      .container {
        padding: 0 20px;
      }

      .site-header .container {
        height: 66px;
      }

      .nav-toggle {
        display: flex;
      }

      .nav-menu {
        position: fixed;
        top: 66px;
        left: 0;
        right: 0;
        background: rgba(10, 14, 23, 0.98);
        backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 20px;
        gap: 8px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
        transform: translateY(-120%);
        transition: transform 0.35s ease;
        z-index: 999;
        align-items: stretch;
      }

      .nav-menu.open {
        transform: translateY(0);
      }

      .nav-menu a {
        padding: 15px 20px;
        text-align: center;
        font-size: 16px;
      }

      .nav-cta {
        display: none;
      }

      .page-banner {
        padding: 80px 0 64px;
      }

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

      .overview-media img {
        min-height: 260px;
      }

      .overview-list {
        grid-template-columns: 1fr;
      }

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

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

      .cta-box {
        padding: 40px 24px;
      }
    }

    @media (max-width: 520px) {
      .feature-grid {
        grid-template-columns: 1fr;
      }

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

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

      .stat-num {
        font-size: 32px;
      }

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

      .section-title {
        font-size: 26px;
      }

      .overview-list {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 400px) {
      :root {
        --space-section: 56px;
      }

      .container {
        padding: 0 16px;
      }

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

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

/* roulang page: article */
:root {
      --bg-dark: #080b12;
      --bg-body: #0d1420;
      --bg-card: #131c2b;
      --bg-card-2: #1a2435;
      --primary: #00e5ff;
      --secondary: #9d5cff;
      --accent: #ffc24b;
      --text: #e6edf3;
      --text-weak: #93a1b5;
      --border: rgba(0, 229, 255, 0.15);
      --radius: 14px;
      --radius-sm: 8px;
      --shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
      --shadow-glow: 0 0 24px rgba(0, 229, 255, 0.22);
      --transition: all 0.3s ease;
      --space-section: 90px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      background: var(--bg-body);
      color: var(--text);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

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

    button,
    input,
    textarea {
      font-family: inherit;
    }

    ::selection {
      background: rgba(0, 229, 255, 0.25);
      color: #fff;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .section-head {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }

    .section-head h2 {
      font-size: 32px;
      font-weight: 800;
      color: #fff;
      letter-spacing: 1px;
      line-height: 1.35;
    }

    .section-head p {
      color: var(--text-weak);
      font-size: 15px;
      margin-top: 12px;
    }

    .section-line {
      display: inline-block;
      width: 48px;
      height: 4px;
      border-radius: 4px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      margin-right: 12px;
      vertical-align: middle;
      box-shadow: var(--shadow-glow);
    }

    /* ===== Buttons ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 13px 28px;
      border-radius: 10px;
      font-weight: 700;
      font-size: 15px;
      border: none;
      cursor: pointer;
      transition: var(--transition);
      line-height: 1.4;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #fff;
      box-shadow: 0 4px 18px rgba(0, 229, 255, 0.25);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(0, 229, 255, 0.4);
      color: #fff;
    }

    .btn-outline {
      background: transparent;
      border: 1px solid var(--primary);
      color: var(--primary);
    }

    .btn-outline:hover {
      background: rgba(0, 229, 255, 0.1);
      color: #fff;
      box-shadow: var(--shadow-glow);
    }

    .btn-lg {
      padding: 16px 38px;
      font-size: 16px;
      border-radius: 12px;
    }

    .btn-sm {
      padding: 9px 18px;
      font-size: 13px;
      border-radius: 8px;
    }

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

    /* ===== Header / Nav ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(8, 11, 18, 0.92);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--border);
      box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
      gap: 24px;
    }

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

    .logo-icon {
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 20px;
      box-shadow: var(--shadow-glow);
    }

    .logo-text {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: 0.5px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      white-space: nowrap;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .nav-menu a {
      padding: 10px 18px;
      border-radius: 10px;
      color: var(--text-weak);
      font-size: 15px;
      font-weight: 600;
      position: relative;
    }

    .nav-menu a:hover {
      color: #fff;
      background: rgba(0, 229, 255, 0.08);
    }

    .nav-menu a.active {
      color: var(--primary);
      background: rgba(0, 229, 255, 0.12);
      box-shadow: inset 0 -2px 0 var(--primary), var(--shadow-glow);
    }

    .header-tools {
      display: flex;
      align-items: center;
      gap: 14px;
      flex-shrink: 0;
    }

    .menu-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border-radius: 10px;
      border: 1px solid var(--border);
      background: var(--bg-card);
      color: var(--primary);
      font-size: 18px;
      cursor: pointer;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
    }

    .menu-toggle:hover {
      box-shadow: var(--shadow-glow);
      border-color: var(--primary);
    }

    /* ===== Article Banner ===== */
    .article-banner {
      padding: 84px 0 64px;
      background: linear-gradient(135deg, rgba(8, 11, 18, 0.92), rgba(20, 30, 52, 0.72)), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
      border-bottom: 1px solid var(--border);
      position: relative;
      overflow: hidden;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      font-size: 14px;
      color: var(--text-weak);
      margin-bottom: 22px;
    }

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

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

    .breadcrumb i {
      font-size: 12px;
      opacity: 0.6;
    }

    .article-banner h1 {
      font-size: 38px;
      font-weight: 800;
      line-height: 1.4;
      color: #fff;
      max-width: 900px;
      letter-spacing: 0.5px;
      text-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
    }

    .meta-banner {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 18px;
      margin-top: 24px;
      font-size: 14px;
      color: var(--text-weak);
    }

    .meta-banner i {
      color: var(--primary);
      margin-right: 6px;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 5px 14px;
      border-radius: 30px;
      background: rgba(0, 229, 255, 0.12);
      border: 1px solid rgba(0, 229, 255, 0.35);
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
    }

    /* ===== Article Main ===== */
    .article-section {
      padding: 60px 0 70px;
    }

    .article-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 340px;
      gap: 40px;
      align-items: start;
    }

    .article-main {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 44px;
      box-shadow: var(--shadow);
    }

    .article-main .cover-image {
      border-radius: var(--radius-sm);
      margin-bottom: 30px;
      box-shadow: var(--shadow);
    }

    .article-body {
      font-size: 16px;
      color: rgba(230, 237, 243, 0.85);
      line-height: 1.9;
    }

    .article-body h2 {
      font-size: 24px;
      font-weight: 800;
      color: #fff;
      margin: 32px 0 16px;
      padding-left: 14px;
      border-left: 4px solid var(--primary);
      border-radius: 2px;
    }

    .article-body h3 {
      font-size: 19px;
      font-weight: 700;
      color: #fff;
      margin: 26px 0 12px;
    }

    .article-body p {
      margin-bottom: 18px;
    }

    .article-body img {
      border-radius: var(--radius-sm);
      margin: 22px 0;
      box-shadow: var(--shadow);
    }

    .article-body ul,
    .article-body ol {
      margin: 0 0 18px 22px;
    }

    .article-body li {
      margin-bottom: 8px;
    }

    .article-body blockquote {
      border-left: 4px solid var(--primary);
      background: rgba(0, 229, 255, 0.06);
      padding: 16px 22px;
      border-radius: 0 8px 8px 0;
      margin: 22px 0;
      color: rgba(230, 237, 243, 0.8);
    }

    .article-body a {
      color: var(--primary);
      text-decoration: underline;
      text-underline-offset: 3px;
    }

    .article-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 36px;
      padding-top: 22px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }

    .article-tags .tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      border-radius: 30px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      color: var(--text-weak);
      font-size: 13px;
      transition: var(--transition);
    }

    .article-tags .tag:hover {
      color: var(--primary);
      border-color: var(--primary);
      box-shadow: var(--shadow-glow);
    }

    .article-tags .tag i {
      color: var(--primary);
    }

    .not-found-box {
      text-align: center;
      padding: 80px 24px;
      max-width: 520px;
      margin: 0 auto;
    }

    .not-found-box .not-found-icon {
      font-size: 56px;
      color: var(--primary);
      margin-bottom: 20px;
      display: inline-block;
      animation: floatY 3s ease-in-out infinite;
    }

    @keyframes floatY {
      0%,
      100% {
        transform: translateY(0);
      }
      50% {
        transform: translateY(-10px);
      }
    }

    .not-found-box h1 {
      font-size: 32px;
      color: #fff;
      margin-bottom: 14px;
    }

    .not-found-box p {
      color: var(--text-weak);
      margin-bottom: 30px;
    }

    /* ===== Sidebar ===== */
    .sidebar-widget {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 26px;
      margin-bottom: 24px;
      box-shadow: var(--shadow);
    }

    .sidebar-widget:last-child {
      margin-bottom: 0;
    }

    .sidebar-title {
      font-size: 17px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 18px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .sidebar-title i {
      color: var(--primary);
      font-size: 15px;
    }

    .sidebar-intro {
      font-size: 14px;
      color: var(--text-weak);
      line-height: 1.8;
      margin-bottom: 16px;
    }

    .sidebar-cat-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .sidebar-cat-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 13px 16px;
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      transition: var(--transition);
    }

    .sidebar-cat-item:hover {
      border-color: var(--primary);
      background: rgba(0, 229, 255, 0.07);
      transform: translateX(4px);
    }

    .sidebar-cat-item i {
      color: var(--primary);
      font-size: 16px;
      width: 20px;
      text-align: center;
    }

    .sidebar-cat-item span {
      font-size: 14px;
      font-weight: 600;
    }

    .sidebar-cat-item small {
      display: block;
      color: var(--text-weak);
      font-size: 12px;
      font-weight: 400;
    }

    .sidebar-help {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 14px;
      border-radius: 10px;
      background: rgba(157, 92, 255, 0.08);
      border: 1px solid rgba(157, 92, 255, 0.2);
      margin-bottom: 12px;
    }

    .sidebar-help i {
      color: var(--secondary);
      font-size: 16px;
      margin-top: 3px;
    }

    .sidebar-help p {
      font-size: 13px;
      color: var(--text-weak);
      line-height: 1.7;
    }

    .sidebar-help a {
      color: var(--primary);
      font-weight: 600;
    }

    .sidebar-help a:hover {
      text-decoration: underline;
    }

    /* ===== Related ===== */
    .related-section {
      padding: 70px 0;
      background: var(--bg-dark);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .related-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }

    .related-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      transition: var(--transition);
    }

    .related-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-glow), var(--shadow);
      border-color: rgba(0, 229, 255, 0.45);
    }

    .related-card-cover {
      position: relative;
      aspect-ratio: 16 / 10;
      overflow: hidden;
    }

    .related-card-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

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

    .related-badge {
      position: absolute;
      top: 14px;
      left: 14px;
      padding: 5px 14px;
      border-radius: 30px;
      background: rgba(8, 11, 18, 0.75);
      backdrop-filter: blur(8px);
      color: var(--primary);
      font-size: 12px;
      font-weight: 700;
      border: 1px solid rgba(0, 229, 255, 0.4);
    }

    .related-card-body {
      padding: 24px;
    }

    .related-card-body h3 {
      font-size: 18px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }

    .related-card-body p {
      font-size: 14px;
      color: var(--text-weak);
      line-height: 1.75;
      margin-bottom: 16px;
    }

    .related-link {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--primary);
      font-size: 14px;
      font-weight: 700;
    }

    .related-link i {
      transition: transform 0.3s ease;
    }

    .related-link:hover i {
      transform: translateX(5px);
    }

    /* ===== FAQ ===== */
    .faq-section {
      padding: 80px 0;
    }

    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px 28px;
      margin-bottom: 14px;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: rgba(0, 229, 255, 0.35);
      box-shadow: var(--shadow);
    }

    .faq-item h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .faq-item h3 i {
      font-size: 14px;
    }

    .faq-item p {
      font-size: 14px;
      color: var(--text-weak);
      line-height: 1.8;
      margin-left: 24px;
    }

    /* ===== CTA ===== */
    .cta-section {
      padding: 80px 0;
      background: linear-gradient(135deg, rgba(0, 229, 255, 0.06), rgba(157, 92, 255, 0.1)), url('/assets/images/backpic/back-2.png') center / cover no-repeat;
      border-top: 1px solid var(--border);
    }

    .cta-box {
      max-width: 760px;
      margin: 0 auto;
      text-align: center;
    }

    .cta-box h2 {
      font-size: 36px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 16px;
      line-height: 1.4;
    }

    .cta-box p {
      font-size: 16px;
      color: var(--text-weak);
      margin-bottom: 30px;
      line-height: 1.8;
    }

    .cta-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--bg-dark);
      border-top: 1px solid var(--border);
      padding-top: 60px;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 40px;
    }

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

    .footer-brand p {
      font-size: 14px;
      color: var(--text-weak);
      line-height: 1.8;
      margin-bottom: 18px;
    }

    .footer-social {
      display: flex;
      gap: 10px;
    }

    .footer-social a {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.08);
      color: var(--text-weak);
      font-size: 16px;
      transition: var(--transition);
    }

    .footer-social a:hover {
      background: rgba(0, 229, 255, 0.12);
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-3px);
    }

    .footer-col h4 {
      font-size: 16px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }

    .footer-col ul {
      list-style: none;
    }

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

    .footer-col ul li a {
      color: var(--text-weak);
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .footer-col ul li a i {
      font-size: 12px;
      color: var(--primary);
    }

    .footer-col ul li a:hover {
      color: var(--primary);
      transform: translateX(4px);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 22px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
    }

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

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

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

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

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      .article-layout {
        grid-template-columns: minmax(0, 1fr) 300px;
        gap: 28px;
      }

      .related-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 18px;
      }

      .footer-top {
        grid-template-columns: 1fr 1fr 1fr;
        gap: 30px;
      }

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

    @media (max-width: 820px) {
      .menu-toggle {
        display: flex;
      }

      .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(8, 11, 18, 0.98);
        backdrop-filter: blur(18px);
        border-bottom: 1px solid var(--border);
        padding: 18px;
        gap: 6px;
        transform: translateY(-130%);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.35s ease, opacity 0.35s ease;
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
      }

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

      .nav-menu a {
        width: 100%;
        text-align: center;
        padding: 14px;
        border-radius: 10px;
      }

      .nav-menu a.active {
        box-shadow: inset 0 0 0 1px var(--primary), var(--shadow-glow);
      }

      .article-layout {
        grid-template-columns: 1fr;
      }

      .article-main {
        padding: 30px;
      }

      .related-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin: 0 auto;
      }

      .article-banner {
        padding: 60px 0 48px;
      }

      .article-banner h1 {
        font-size: 28px;
      }

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

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

    @media (max-width: 520px) {
      .container {
        padding: 0 16px;
      }

      .header-inner {
        height: 64px;
        gap: 12px;
      }

      .logo-text {
        font-size: 17px;
      }

      .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 17px;
      }

      .header-tools .btn-sm {
        display: none;
      }

      .nav-menu {
        top: 64px;
      }

      .article-banner h1 {
        font-size: 23px;
      }

      .meta-banner {
        gap: 12px;
      }

      .article-main {
        padding: 22px 18px;
      }

      .article-body {
        font-size: 15px;
      }

      .article-body h2 {
        font-size: 21px;
      }

      .article-body h3 {
        font-size: 17px;
      }

      .section-head h2 {
        font-size: 23px;
      }

      .faq-item {
        padding: 18px;
      }

      .faq-item p {
        margin-left: 0;
        font-size: 13px;
      }

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

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

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

/* roulang page: category3 */
:root{
  --primary:#7c3aed;
  --primary-light:#a855f7;
  --secondary:#22d3ee;
  --bg-dark:#0f0f14;
  --bg-panel:#17171f;
  --bg-card:#1d1d28;
  --bg-deep:#0a0a0f;
  --text-light:#f0f0f8;
  --text-body:#c7c7d4;
  --text-weak:#8a8a9a;
  --border:rgba(255,255,255,.08);
  --border-glow:rgba(168,85,247,.35);
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:8px;
  --shadow-lg:0 20px 50px rgba(0,0,0,.5);
  --shadow-md:0 10px 30px rgba(0,0,0,.35);
  --transition:.3s cubic-bezier(.4,0,.2,1);
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  background:var(--bg-dark);
  color:var(--text-body);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .25s}
ul,ol{list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}

.container{
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.container-lg{
  max-width:1320px;
  margin:0 auto;
  padding:0 24px;
}

/* ===== 头部导航 ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(15,15,20,.92);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:72px;
  gap:24px;
}
.logo{
  display:flex;
  align-items:center;
  gap:12px;
  flex-shrink:0;
}
.logo-icon{
  width:42px;
  height:42px;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  border-radius:12px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:#fff;
  font-size:20px;
  box-shadow:0 0 20px rgba(124,58,237,.4);
}
.logo-text{
  font-size:20px;
  font-weight:700;
  color:var(--text-light);
  letter-spacing:.5px;
  white-space:nowrap;
}
.header-nav-desktop{
  display:flex;
  align-items:center;
  gap:8px;
}
.header-nav-desktop .nav-link{
  padding:8px 16px;
  border-radius:8px;
  color:var(--text-body);
  font-weight:500;
  font-size:15px;
  transition:all var(--transition);
  position:relative;
}
.header-nav-desktop .nav-link:hover{
  color:var(--text-light);
  background:rgba(255,255,255,.05);
}
.header-nav-desktop .nav-link.active{
  color:#fff;
  background:rgba(124,58,237,.2);
  box-shadow:inset 0 0 0 1px var(--border-glow),0 0 16px rgba(124,58,237,.15);
}
.header-nav-desktop .nav-link.active::after{
  content:"";
  position:absolute;
  bottom:-1px;
  left:50%;
  transform:translateX(-50%);
  width:60%;
  height:2px;
  background:linear-gradient(90deg,var(--primary-light),var(--secondary));
  border-radius:2px;
  box-shadow:0 0 10px rgba(168,85,247,.6);
}
.header-actions{
  display:flex;
  align-items:center;
  gap:12px;
}
.header-search{
  position:relative;
  display:flex;
  align-items:center;
}
.header-search input{
  width:180px;
  height:38px;
  border-radius:19px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.06);
  color:var(--text-light);
  padding:0 38px 0 15px;
  font-size:14px;
  outline:none;
  transition:all var(--transition);
}
.header-search input:focus{
  border-color:var(--primary-light);
  box-shadow:0 0 0 3px rgba(124,58,237,.2);
  width:220px;
}
.header-search i{
  position:absolute;
  right:14px;
  color:var(--text-weak);
  font-size:14px;
}
.btn-header{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:38px;
  padding:0 20px;
  border-radius:19px;
  background:linear-gradient(135deg,var(--primary),var(--primary-light));
  color:#fff;
  font-weight:600;
  font-size:14px;
  border:none;
  cursor:pointer;
  box-shadow:0 4px 16px rgba(124,58,237,.35);
  transition:all var(--transition);
}
.btn-header:hover{
  transform:translateY(-1px);
  box-shadow:0 6px 24px rgba(124,58,237,.5);
}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border-radius:10px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.05);
  color:var(--text-light);
  font-size:20px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
}
.mobile-menu{
  display:none;
  background:var(--bg-panel);
  border-top:1px solid var(--border);
  padding:16px 24px;
  gap:4px;
  flex-direction:column;
}
.mobile-menu a{
  padding:12px 16px;
  border-radius:8px;
  font-size:15px;
  color:var(--text-body);
  font-weight:500;
}
.mobile-menu a:hover{
  background:rgba(255,255,255,.05);
  color:var(--text-light);
}
.mobile-menu a.active{
  color:#fff;
  background:rgba(124,58,237,.2);
}

/* ===== Hero区域 ===== */
.page-hero{
  position:relative;
  padding:110px 0 90px;
  background:linear-gradient(rgba(10,10,15,.82),rgba(10,10,15,.92)),url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  overflow:hidden;
}
.page-hero::before{
  content:"";
  position:absolute;
  top:-60px;
  right:-60px;
  width:360px;
  height:360px;
  background:radial-gradient(circle,rgba(124,58,237,.3),transparent 70%);
  border-radius:50%;
  pointer-events:none;
}
.page-hero::after{
  content:"";
  position:absolute;
  bottom:-40px;
  left:30%;
  width:300px;
  height:300px;
  background:radial-gradient(circle,rgba(34,211,238,.15),transparent 70%);
  border-radius:50%;
  pointer-events:none;
}
.page-hero-inner{
  position:relative;
  z-index:2;
  text-align:center;
  max-width:800px;
  margin:0 auto;
}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(124,58,237,.15);
  border:1px solid var(--border-glow);
  color:var(--primary-light);
  padding:6px 16px;
  border-radius:20px;
  font-size:13px;
  font-weight:600;
  letter-spacing:1px;
  margin-bottom:24px;
}
.page-hero h1{
  font-size:48px;
  line-height:1.2;
  color:var(--text-light);
  font-weight:800;
  letter-spacing:-1px;
  margin-bottom:18px;
}
.page-hero h1 span{
  background:linear-gradient(135deg,var(--primary-light),var(--secondary));
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.page-hero p{
  font-size:18px;
  color:var(--text-body);
  max-width:640px;
  margin:0 auto 32px;
  line-height:1.8;
}
.hero-steps{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:12px;
  flex-wrap:wrap;
  margin-top:28px;
}
.hero-steps .step-item{
  display:flex;
  align-items:center;
  gap:8px;
  background:rgba(255,255,255,.06);
  border:1px solid var(--border);
  padding:8px 18px;
  border-radius:24px;
  font-size:14px;
  color:var(--text-body);
  backdrop-filter:blur(8px);
}
.hero-steps .step-item i{
  color:var(--secondary);
}
.hero-steps .step-arrow{
  color:var(--text-weak);
  font-size:14px;
}

/* ===== 面包屑 ===== */
.breadcrumb-bar{
  background:var(--bg-panel);
  border-bottom:1px solid var(--border);
  padding:14px 0;
  font-size:14px;
}
.breadcrumb-bar .container{
  display:flex;
  align-items:center;
  gap:8px;
  flex-wrap:wrap;
}
.breadcrumb-bar a{
  color:var(--text-weak);
}
.breadcrumb-bar a:hover{
  color:var(--primary-light);
}
.breadcrumb-bar .sep{
  color:var(--text-weak);
  font-size:12px;
}
.breadcrumb-bar .current{
  color:var(--text-light);
  font-weight:500;
}

/* ===== 板块通用 ===== */
.section{
  padding:90px 0;
}
.section-alt{
  background:var(--bg-panel);
}
.section-head{
  text-align:center;
  max-width:680px;
  margin:0 auto 56px;
}
.section-tag{
  display:inline-block;
  font-size:13px;
  font-weight:700;
  letter-spacing:2px;
  color:var(--primary-light);
  background:rgba(124,58,237,.12);
  border:1px solid var(--border-glow);
  padding:4px 14px;
  border-radius:20px;
  margin-bottom:16px;
}
.section-head h2{
  font-size:36px;
  line-height:1.25;
  color:var(--text-light);
  font-weight:700;
  letter-spacing:-.5px;
  margin-bottom:14px;
}
.section-head p{
  font-size:16px;
  color:var(--text-weak);
  line-height:1.7;
}

/* ===== 上手流程 ===== */
.steps-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:28px;
}
.step-card{
  position:relative;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:36px 24px 28px;
  text-align:center;
  transition:all var(--transition);
  overflow:hidden;
}
.step-card::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:3px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  opacity:0;
  transition:opacity var(--transition);
}
.step-card:hover::before{
  opacity:1;
}
.step-card:hover{
  transform:translateY(-6px);
  border-color:rgba(168,85,247,.35);
  box-shadow:var(--shadow-md);
}
.step-num{
  width:56px;
  height:56px;
  border-radius:16px;
  margin:0 auto 18px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:22px;
  font-weight:700;
  color:#fff;
  background:linear-gradient(135deg,var(--primary),var(--primary-light));
  box-shadow:0 8px 20px rgba(124,58,237,.35);
}
.step-card:nth-child(2) .step-num{
  background:linear-gradient(135deg,#3b82f6,#22d3ee);
  box-shadow:0 8px 20px rgba(59,130,246,.35);
}
.step-card:nth-child(3) .step-num{
  background:linear-gradient(135deg,#f59e0b,#fbbf24);
  box-shadow:0 8px 20px rgba(245,158,11,.35);
}
.step-card:nth-child(4) .step-num{
  background:linear-gradient(135deg,#10b981,#34d399);
  box-shadow:0 8px 20px rgba(16,185,129,.35);
}
.step-card h3{
  font-size:18px;
  color:var(--text-light);
  margin-bottom:10px;
  font-weight:600;
}
.step-card p{
  font-size:14px;
  color:var(--text-weak);
  line-height:1.7;
}

/* ===== 教程分类卡片 ===== */
.tutorial-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:28px;
}
.tutorial-card{
  position:relative;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  transition:all var(--transition);
}
.tutorial-card:hover{
  transform:translateY(-8px);
  border-color:rgba(168,85,247,.35);
  box-shadow:var(--shadow-lg);
}
.tutorial-thumb{
  position:relative;
  height:220px;
  overflow:hidden;
}
.tutorial-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.tutorial-card:hover .tutorial-thumb img{
  transform:scale(1.06);
}
.tutorial-thumb::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(to top,rgba(15,15,20,.7),transparent 55%);
}
.tutorial-tag{
  position:absolute;
  top:16px;
  left:16px;
  z-index:3;
  background:rgba(124,58,237,.85);
  backdrop-filter:blur(6px);
  color:#fff;
  font-size:12px;
  font-weight:600;
  padding:5px 12px;
  border-radius:16px;
  border:1px solid rgba(255,255,255,.2);
}
.tutorial-tag.hot{
  background:rgba(245,158,11,.85);
  border-color:rgba(245,158,11,.5);
}
.tutorial-body{
  padding:24px;
}
.tutorial-body h3{
  font-size:17px;
  color:var(--text-light);
  font-weight:600;
  margin-bottom:10px;
  line-height:1.5;
}
.tutorial-body p{
  font-size:14px;
  color:var(--text-weak);
  line-height:1.75;
  margin-bottom:16px;
}
.tutorial-meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-top:14px;
  border-top:1px solid var(--border);
}
.tutorial-meta .info{
  display:flex;
  align-items:center;
  gap:12px;
  font-size:13px;
  color:var(--text-weak);
}
.tutorial-meta .info i{
  margin-right:4px;
  font-size:13px;
}
.tutorial-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14px;
  font-weight:600;
  color:var(--primary-light);
  transition:gap var(--transition);
}
.tutorial-link:hover{
  gap:12px;
  color:var(--secondary);
}

/* ===== 特色要点 ===== */
.feature-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}
.feature-img{
  position:relative;
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-lg);
  border:1px solid var(--border);
}
.feature-img img{
  width:100%;
  height:380px;
  object-fit:cover;
}
.feature-img::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(135deg,rgba(124,58,237,.15),transparent 60%);
  pointer-events:none;
}
.feature-content h2{
  font-size:34px;
  color:var(--text-light);
  font-weight:700;
  line-height:1.3;
  margin-bottom:16px;
  letter-spacing:-.5px;
}
.feature-content .lead-text{
  font-size:16px;
  color:var(--text-weak);
  line-height:1.8;
  margin-bottom:28px;
}
.feature-list{
  display:flex;
  flex-direction:column;
  gap:16px;
}
.feature-list-item{
  display:flex;
  align-items:flex-start;
  gap:14px;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  padding:18px 20px;
  transition:all var(--transition);
}
.feature-list-item:hover{
  border-color:rgba(168,85,247,.3);
  box-shadow:0 4px 16px rgba(0,0,0,.3);
}
.feature-list-item .icon-box{
  width:42px;
  height:42px;
  flex-shrink:0;
  border-radius:12px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:17px;
  background:rgba(124,58,237,.15);
  color:var(--primary-light);
  border:1px solid rgba(124,58,237,.2);
}
.feature-list-item h4{
  font-size:15px;
  color:var(--text-light);
  font-weight:600;
  margin-bottom:4px;
}
.feature-list-item p{
  font-size:14px;
  color:var(--text-weak);
  line-height:1.6;
}

/* ===== FAQ ===== */
.faq-wrap{
  max-width:820px;
  margin:0 auto;
}
.faq-item{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  margin-bottom:16px;
  overflow:hidden;
  transition:border-color var(--transition);
}
.faq-item:hover{
  border-color:rgba(168,85,247,.25);
}
.faq-question{
  width:100%;
  background:none;
  border:none;
  padding:22px 24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  cursor:pointer;
  text-align:left;
  color:var(--text-light);
  font-size:16px;
  font-weight:600;
  transition:color var(--transition);
}
.faq-question .faq-icon{
  width:32px;
  height:32px;
  flex-shrink:0;
  border-radius:50%;
  background:rgba(124,58,237,.15);
  border:1px solid rgba(124,58,237,.3);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:14px;
  color:var(--primary-light);
  transition:all var(--transition);
}
.faq-item.active .faq-question{
  color:#fff;
}
.faq-item.active .faq-icon{
  transform:rotate(45deg);
  background:var(--primary);
  color:#fff;
}
.faq-answer{
  max-height:0;
  overflow:hidden;
  transition:max-height .4s ease;
}
.faq-answer-inner{
  padding:0 24px 22px;
  font-size:15px;
  color:var(--text-body);
  line-height:1.8;
  border-top:1px solid var(--border);
  padding-top:16px;
  margin:0 24px;
}
.faq-answer-inner a{
  color:var(--primary-light);
  font-weight:500;
}
.faq-answer-inner a:hover{
  color:var(--secondary);
}

/* ===== CTA区域 ===== */
.cta-section{
  position:relative;
  background:linear-gradient(135deg,rgba(124,58,237,.15),rgba(34,211,238,.1)),var(--bg-deep);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
  padding:80px 0;
  text-align:center;
  overflow:hidden;
}
.cta-section::before{
  content:"";
  position:absolute;
  top:50%;
  left:50%;
  transform:translate(-50%,-50%);
  width:600px;
  height:600px;
  background:radial-gradient(circle,rgba(124,58,237,.15),transparent 60%);
  pointer-events:none;
}
.cta-inner{
  position:relative;
  z-index:2;
  max-width:640px;
  margin:0 auto;
}
.cta-inner h2{
  font-size:36px;
  color:var(--text-light);
  font-weight:700;
  margin-bottom:16px;
  letter-spacing:-.5px;
}
.cta-inner p{
  font-size:16px;
  color:var(--text-body);
  margin-bottom:28px;
  line-height:1.8;
}
.cta-buttons{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:16px;
  flex-wrap:wrap;
}
.btn-primary{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:linear-gradient(135deg,var(--primary),var(--primary-light));
  color:#fff;
  font-size:16px;
  font-weight:600;
  padding:14px 32px;
  border-radius:28px;
  border:none;
  cursor:pointer;
  box-shadow:0 6px 24px rgba(124,58,237,.4);
  transition:all var(--transition);
}
.btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 10px 32px rgba(124,58,237,.55);
}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:transparent;
  border:1px solid var(--border);
  color:var(--text-light);
  font-size:16px;
  font-weight:500;
  padding:14px 32px;
  border-radius:28px;
  cursor:pointer;
  transition:all var(--transition);
}
.btn-ghost:hover{
  border-color:var(--primary-light);
  color:var(--primary-light);
  background:rgba(124,58,237,.05);
}

/* ===== 相关资源 ===== */
.resource-grid{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:24px;
}
.resource-card{
  display:flex;
  align-items:center;
  gap:20px;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  padding:20px 24px;
  transition:all var(--transition);
}
.resource-card:hover{
  border-color:rgba(168,85,247,.3);
  box-shadow:var(--shadow-md);
  transform:translateX(6px);
}
.resource-icon{
  width:52px;
  height:52px;
  flex-shrink:0;
  border-radius:14px;
  background:linear-gradient(135deg,rgba(124,58,237,.15),rgba(34,211,238,.1));
  border:1px solid rgba(168,85,247,.2);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:20px;
  color:var(--primary-light);
}
.resource-info h4{
  font-size:16px;
  color:var(--text-light);
  font-weight:600;
  margin-bottom:4px;
}
.resource-info p{
  font-size:14px;
  color:var(--text-weak);
  line-height:1.5;
}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--bg-deep);
  border-top:1px solid var(--border);
  padding:70px 0 0;
}
.footer-top{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:48px;
  padding-bottom:48px;
  border-bottom:1px solid var(--border);
}
.footer-brand p{
  margin-top:16px;
  font-size:14px;
  line-height:1.8;
  color:var(--text-weak);
  max-width:320px;
}
.footer-social{
  display:flex;
  gap:12px;
  margin-top:20px;
}
.footer-social a{
  width:38px;
  height:38px;
  border-radius:10px;
  background:rgba(255,255,255,.06);
  border:1px solid var(--border);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--text-body);
  font-size:15px;
  transition:all var(--transition);
}
.footer-social a:hover{
  background:var(--primary);
  color:#fff;
  border-color:var(--primary);
  box-shadow:0 4px 16px rgba(124,58,237,.4);
  transform:translateY(-2px);
}
.footer-col h4{
  font-size:15px;
  color:var(--text-light);
  font-weight:600;
  margin-bottom:18px;
}
.footer-col ul li{
  margin-bottom:10px;
}
.footer-col ul a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--text-weak);
  transition:all .25s;
}
.footer-col ul a i{
  font-size:11px;
  color:var(--primary-light);
  transition:transform .25s;
}
.footer-col ul a:hover{
  color:var(--text-light);
}
.footer-col ul a:hover i{
  transform:translateX(3px);
}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:24px 0;
  flex-wrap:wrap;
}
.footer-bottom p{
  font-size:14px;
  color:var(--text-weak);
}
.footer-links{
  display:flex;
  gap:20px;
}
.footer-links a{
  font-size:14px;
  color:var(--text-weak);
  transition:color .25s;
}
.footer-links a:hover{
  color:var(--primary-light);
}

/* ===== 响应式断点 ===== */
@media (max-width:1024px){
  .steps-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .tutorial-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .feature-row{
    grid-template-columns:1fr;
    gap:40px;
  }
  .feature-img img{
    height:300px;
  }
  .footer-top{
    grid-template-columns:1fr 1fr;
    gap:40px;
  }
}
@media (max-width:768px){
  .header-nav-desktop,.header-actions .header-search{
    display:none;
  }
  .nav-toggle{
    display:flex;
  }
  .mobile-menu.open{
    display:flex;
  }
  .header-inner{
    height:64px;
  }
  .logo-text{
    font-size:17px;
  }
  .page-hero{
    padding:70px 0 60px;
  }
  .page-hero h1{
    font-size:32px;
  }
  .page-hero p{
    font-size:16px;
  }
  .section{
    padding:60px 0;
  }
  .section-head h2{
    font-size:28px;
  }
  .tutorial-grid{
    grid-template-columns:1fr;
  }
  .resource-grid{
    grid-template-columns:1fr;
  }
  .cta-inner h2{
    font-size:28px;
  }
  .footer-top{
    grid-template-columns:1fr;
    gap:32px;
  }
  .footer-bottom{
    flex-direction:column;
    text-align:center;
  }
}
@media (max-width:520px){
  .container{
    padding:0 18px;
  }
  .steps-grid{
    grid-template-columns:1fr;
  }
  .hero-steps{
    flex-direction:column;
  }
  .page-hero h1{
    font-size:26px;
  }
  .btn-header{
    padding:0 14px;
    font-size:13px;
  }
  .header-actions{
    gap:8px;
  }
  .section-head h2{
    font-size:24px;
  }
  .tutorial-thumb{
    height:180px;
  }
}

/* roulang page: category2 */
:root {
            --primary: #00d4ff;
            --primary-dark: #0099cc;
            --accent: #ffc93d;
            --accent-rgb: 255, 201, 61;
            --primary-rgb: 0, 212, 255;
            --bg: #080e1a;
            --bg-panel: #0f1726;
            --bg-panel-2: #131e33;
            --bg-card: #111a2e;
            --text-main: #eaf0f8;
            --text-body: #b8c2d4;
            --text-muted: #7c8aa3;
            --border: #1b2a42;
            --border-light: #2a3f5e;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 22px;
            --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.35);
            --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 30px rgba(var(--primary-rgb), 0.18);
            --font-main: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-main);
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .3s ease;
        }
        img {
            max-width: 100%;
            display: block;
            height: auto;
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            outline: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all .3s ease;
            text-decoration: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 18px rgba(var(--primary-rgb), 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(var(--primary-rgb), 0.45);
            color: #fff;
        }
        .btn-accent {
            background: linear-gradient(135deg, var(--accent), #ff9f1c);
            color: #111;
            box-shadow: 0 4px 16px rgba(var(--accent-rgb), 0.2);
        }
        .btn-accent:hover {
            transform: translateY(-2px);
            color: #111;
            box-shadow: 0 8px 24px rgba(var(--accent-rgb), 0.35);
        }
        .btn-ghost {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-main);
        }
        .btn-ghost:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(var(--primary-rgb), 0.08);
            transform: translateY(-2px);
        }
        .btn:focus-visible {
            outline: 3px solid rgba(var(--primary-rgb), 0.4);
            outline-offset: 2px;
        }

        .section-eyebrow {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 4px;
            text-transform: uppercase;
            color: var(--primary);
            border: 1px solid rgba(var(--primary-rgb), 0.3);
            background: rgba(var(--primary-rgb), 0.08);
            padding: 5px 16px;
            border-radius: 6px;
            margin-bottom: 14px;
        }
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            letter-spacing: -.5px;
            margin-bottom: 12px;
        }
        .section-head p {
            color: var(--text-body);
            font-size: 15px;
            line-height: 1.8;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 999;
            background: rgba(8, 14, 26, 0.94);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 28px rgba(0, 0, 0, 0.5);
        }
        .site-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
            z-index: 2;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            min-height: 72px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            box-shadow: 0 4px 16px rgba(var(--primary-rgb), 0.4);
        }
        .logo-text {
            font-size: 18px;
            font-weight: 800;
            letter-spacing: 1px;
            color: var(--text-main);
            white-space: nowrap;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
        }
        .nav-menu a {
            position: relative;
            padding: 10px 16px;
            border-radius: 8px;
            color: var(--text-body);
            font-weight: 500;
            font-size: 15px;
            transition: color .3s, background .3s;
        }
        .nav-menu a:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.05);
        }
        .nav-menu a.active {
            color: var(--primary);
            background: rgba(var(--primary-rgb), 0.1);
            text-shadow: 0 0 12px rgba(var(--primary-rgb), 0.5);
        }
        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            box-shadow: 0 0 10px var(--primary);
        }
        .nav-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent), #ff9f1c);
            color: #111;
            font-weight: 700;
            font-size: 14px;
            box-shadow: 0 4px 14px rgba(var(--accent-rgb), 0.25);
            transition: all .3s ease;
            white-space: nowrap;
        }
        .nav-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(var(--accent-rgb), 0.4);
            color: #111;
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border-light);
            color: var(--text-main);
            width: 44px;
            height: 44px;
            border-radius: 10px;
            font-size: 18px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all .3s;
        }
        .nav-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .page-banner {
            position: relative;
            background: url('/assets/images/backpic/back-1.png') no-repeat center center / cover;
            padding: 100px 0 96px;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(8, 14, 26, 0.92), rgba(8, 14, 26, 0.78) 55%, var(--bg));
        }
        .banner-content {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb i {
            font-size: 12px;
            opacity: .5;
        }
        .page-banner h1 {
            font-size: 44px;
            font-weight: 900;
            letter-spacing: -1px;
            line-height: 1.2;
            margin-bottom: 16px;
            color: #fff;
            text-shadow: 0 0 32px rgba(var(--primary-rgb), 0.35);
        }
        .page-banner .lead {
            max-width: 660px;
            color: var(--text-body);
            font-size: 17px;
            line-height: 1.9;
            margin-bottom: 30px;
        }
        .banner-btns {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .tag-section {
            padding: 30px 0;
            border-bottom: 1px solid var(--border);
            background: var(--bg-panel);
        }
        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: 30px;
            border: 1px solid var(--border-light);
            background: var(--bg-panel-2);
            color: var(--text-body);
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: all .3s ease;
        }
        .tag:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .tag.active {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(var(--primary-rgb), 0.12);
            box-shadow: 0 0 18px rgba(var(--primary-rgb), 0.15);
        }

        .featured-section {
            padding: 90px 0 70px;
        }
        .featured-card {
            background: linear-gradient(150deg, var(--bg-card), var(--bg-panel));
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: all .35s ease;
        }
        .featured-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 16px 44px rgba(0, 0, 0, 0.55), 0 0 24px rgba(var(--primary-rgb), 0.12);
            border-color: rgba(var(--primary-rgb), 0.45);
        }
        .card-thumb {
            position: relative;
            overflow: hidden;
            height: 210px;
        }
        .card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .6s ease;
        }
        .featured-card:hover .card-thumb img {
            transform: scale(1.06);
        }
        .card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--accent);
            color: #111;
            font-size: 12px;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 6px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
        }
        .card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .card-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .card-body .card-desc {
            color: var(--text-body);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            color: var(--primary);
            transition: all .3s ease;
        }
        .card-link:hover {
            gap: 13px;
            color: var(--accent);
        }

        .news-section {
            padding: 90px 0;
            background: var(--bg-panel);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .news-list {
            max-width: 920px;
            margin: 0 auto;
        }
        .news-item {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px;
            margin-bottom: 16px;
            transition: all .3s ease;
        }
        .news-item:hover {
            border-color: rgba(var(--primary-rgb), 0.4);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
            transform: translateX(4px);
        }
        .news-thumb {
            width: 160px;
            height: 105px;
            border-radius: 10px;
            overflow: hidden;
            flex-shrink: 0;
        }
        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-content {
            flex: 1;
            min-width: 0;
        }
        .news-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 4px;
            background: rgba(var(--primary-rgb), 0.12);
            color: var(--primary);
            margin-bottom: 8px;
        }
        .news-content h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .news-content p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.6;
        }
        .news-meta {
            display: flex;
            gap: 20px;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 10px;
        }
        .news-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .news-more {
            text-align: center;
            margin-top: 36px;
        }

        .stats-section {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.07), rgba(124, 77, 255, 0.05));
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 36px 20px;
            border-radius: var(--radius);
            background: rgba(17, 26, 44, 0.75);
            border: 1px solid var(--border);
            transition: all .3s ease;
        }
        .stat-item:hover {
            border-color: rgba(var(--primary-rgb), 0.5);
            box-shadow: var(--shadow-glow);
        }
        .stat-num {
            font-size: 46px;
            font-weight: 900;
            color: var(--primary);
            text-shadow: 0 0 22px rgba(var(--primary-rgb), 0.4);
            line-height: 1.2;
        }
        .stat-label {
            margin-top: 10px;
            color: var(--text-muted);
            font-size: 14px;
            letter-spacing: 1px;
        }

        .timeline-section {
            padding: 90px 0;
        }
        .timeline {
            max-width: 760px;
            margin: 0 auto;
            position: relative;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 21px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: linear-gradient(180deg, var(--primary), var(--accent));
        }
        .timeline-item {
            position: relative;
            padding: 0 0 28px 64px;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: 13px;
            top: 8px;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--bg);
            border: 3px solid var(--primary);
            box-shadow: 0 0 14px rgba(var(--primary-rgb), 0.4);
            z-index: 1;
        }
        .timeline-item.is-live::before {
            background: var(--primary);
        }
        .timeline-date {
            font-size: 13px;
            color: var(--primary);
            font-weight: 700;
            letter-spacing: 1px;
            margin-bottom: 4px;
        }
        .timeline-content {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px 24px;
            transition: all .3s ease;
        }
        .timeline-content:hover {
            border-color: rgba(var(--primary-rgb), 0.4);
        }
        .timeline-content h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .timeline-content p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.6;
        }

        .guide-section {
            padding: 90px 0;
            background: var(--bg-panel);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .step-card {
            position: relative;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 38px 24px 30px;
            text-align: center;
            transition: all .35s ease;
        }
        .step-card:hover {
            transform: translateY(-6px);
            border-color: var(--primary);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35), 0 0 20px rgba(var(--primary-rgb), 0.08);
        }
        .step-num {
            font-size: 38px;
            font-weight: 900;
            color: transparent;
            -webkit-text-stroke: 1.5px var(--primary);
            display: block;
            line-height: 1;
            margin-bottom: 16px;
        }
        .step-ico {
            width: 58px;
            height: 58px;
            border-radius: 50%;
            background: rgba(var(--primary-rgb), 0.12);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin: 0 auto 20px;
            border: 1px solid rgba(var(--primary-rgb), 0.2);
        }
        .step-card h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .step-card p {
            color: var(--text-body);
            font-size: 14px;
            line-height: 1.7;
        }

        .faq-section {
            padding: 90px 0;
        }
        .accordion-wrap {
            max-width: 820px;
            margin: 0 auto;
        }
        .accordion {
            background: transparent;
            border: none;
        }
        .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            transition: all .3s ease;
        }
        .accordion-item.is-active {
            border-color: rgba(var(--primary-rgb), 0.45);
        }
        .accordion-title {
            font-size: 16px;
            font-weight: 600;
            padding: 20px 24px;
            color: var(--text-main);
            border: none;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: all .3s ease;
            background: transparent;
            line-height: 1.5;
        }
        .accordion-title:hover {
            color: var(--primary);
            background: rgba(var(--primary-rgb), 0.03);
        }
        .accordion-title::before {
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            content: '\f059';
            color: var(--primary);
            font-size: 18px;
            flex-shrink: 0;
        }
        .accordion-content {
            border: none;
            background: transparent;
            color: var(--text-body);
            line-height: 1.85;
            padding: 0 24px 22px 50px;
            font-size: 14px;
        }
        .accordion-content p {
            margin-bottom: 8px;
        }

        .cta-section {
            position: relative;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            padding: 90px 0;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(8, 14, 26, 0.92), rgba(8, 14, 26, 0.88));
        }
        .cta-inner {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 900;
            letter-spacing: -.5px;
            margin-bottom: 14px;
        }
        .cta-section p {
            color: var(--text-body);
            max-width: 540px;
            margin: 0 auto 32px;
            font-size: 16px;
            line-height: 1.8;
        }
        .cta-btns {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .site-footer {
            background: #060b14;
            border-top: 1px solid var(--border);
            padding: 70px 0 0;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid var(--border);
        }
        .footer-brand .logo {
            margin-bottom: 16px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            border: 1px solid var(--border);
            background: var(--bg-panel);
            color: var(--text-body);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            transition: all .3s ease;
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #111;
            border-color: var(--primary);
            transform: translateY(-3px);
        }
        .footer-col h4 {
            color: var(--text-main);
            font-size: 16px;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 8px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 24px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            color: var(--text-muted);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all .3s ease;
        }
        .footer-col ul a i {
            font-size: 12px;
            transition: transform .3s;
        }
        .footer-col ul a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0 24px;
            flex-wrap: wrap;
            gap: 12px;
            color: var(--text-muted);
            font-size: 13px;
        }
        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .footer-links a {
            color: var(--text-muted);
            transition: color .3s;
        }
        .footer-links a:hover {
            color: var(--primary);
        }

        @media (max-width: 1024px) {
            .section-head h2 {
                font-size: 28px;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--bg);
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border);
                gap: 6px;
                box-shadow: 0 12px 30px rgba(0, 0, 0, 0.6);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-toggle {
                display: flex;
            }
            .page-banner {
                padding: 70px 0 64px;
            }
            .page-banner h1 {
                font-size: 34px;
            }
            .page-banner .lead {
                font-size: 15px;
            }
            .news-item {
                flex-direction: column;
            }
            .news-thumb {
                width: 100%;
                height: 180px;
            }
            .cta-section h2 {
                font-size: 28px;
            }
            .timeline-item {
                padding-left: 54px;
            }
        }
        @media (max-width: 520px) {
            .header-inner {
                gap: 8px;
                padding: 0 16px;
                min-height: 64px;
            }
            .nav-menu {
                top: 64px;
            }
            .logo-text {
                font-size: 15px;
            }
            .nav-btn {
                display: none;
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .page-banner .lead {
                font-size: 14px;
            }
            .banner-btns {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .banner-btns .btn {
                width: 100%;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .card-thumb {
                height: 180px;
            }
            .news-thumb {
                height: 140px;
            }
            .stats-grid {
                gap: 12px;
            }
            .stat-num {
                font-size: 32px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }