/* roulang page: index */
:root{
  --primary:#070f2b;
  --primary-light:#1a2a4f;
  --primary-soft:#23345c;
  --accent:#ff5c33;
  --accent-hover:#e84a22;
  --accent-glow:rgba(255,92,51,.38);
  --cyan:#00d4ff;
  --bg-light:#f4f6fb;
  --bg-white:#ffffff;
  --text-main:#0f1b2d;
  --text-body:#4e5d6e;
  --text-muted:#8296ab;
  --border:#e2e8f0;
  --radius-sm:10px;
  --radius-md:16px;
  --radius-lg:26px;
  --shadow-sm:0 4px 14px rgba(7,15,43,.06);
  --shadow-md:0 14px 36px rgba(7,15,43,.10);
  --shadow-lg:0 28px 64px rgba(7,15,43,.16);
  --transition:all .3s cubic-bezier(.2,.7,.3,1);
  --container:1280px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Helvetica,Arial,sans-serif;
  font-size:16px;line-height:1.7;color:var(--text-main);
  background:var(--bg-white);-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit;transition:var(--transition)}
ul{list-style:none}
button{border:none;background:none;cursor:pointer;font-family:inherit}
input,textarea{font-family:inherit}
.container{max-width:var(--container);margin:0 auto;padding:0 28px}
.section{padding:96px 0}
.section-head{text-align:center;max-width:760px;margin:0 auto 56px}
.section-tag{
  display:inline-block;padding:6px 18px;border-radius:999px;background:rgba(255,92,51,.08);
  color:var(--accent);font-size:13px;font-weight:700;letter-spacing:1px;margin-bottom:14px;
}
.section-head h2{font-size:38px;font-weight:800;line-height:1.3;color:var(--text-main);margin-bottom:14px}
.section-head p{font-size:16px;color:var(--text-body);line-height:1.8}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 32px;border-radius:999px;font-size:15px;font-weight:700;line-height:1;
  transition:var(--transition);white-space:nowrap;
}
.btn i{font-size:14px}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 10px 30px var(--accent-glow)}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 16px 40px var(--accent-glow)}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.55)}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.1);transform:translateY(-2px)}
.btn-dark{background:var(--primary);color:#fff;box-shadow:0 10px 30px rgba(7,15,43,.2)}
.btn-dark:hover{background:var(--primary-light);transform:translateY(-2px)}

/* Header */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(7,15,43,.92);backdrop-filter:blur(18px);
  border-bottom:1px solid rgba(255,255,255,.06);
  transition:var(--transition);
}
.site-header .header-inner{
  max-width:var(--container);margin:0 auto;padding:0 28px;
  height:76px;display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.logo{
  font-size:20px;font-weight:900;color:#fff;letter-spacing:-.3px;
  display:flex;align-items:center;gap:10px;line-height:1.2;
}
.logo::before{
  content:"";width:30px;height:30px;border-radius:9px;flex-shrink:0;
  background:linear-gradient(135deg,var(--accent),#ff8a66);
  box-shadow:0 0 0 4px rgba(255,92,51,.15);display:inline-block;
}
.main-nav ul{display:flex;align-items:center;gap:4px}
.main-nav ul li{position:relative}
.main-nav ul li > a{
  display:flex;align-items:center;gap:7px;color:rgba(255,255,255,.82);
  font-size:15px;font-weight:500;padding:10px 16px;border-radius:999px;transition:var(--transition);
}
.main-nav ul li > a i.fa-chevron-down{font-size:11px;opacity:.6}
.main-nav ul li > a:hover{color:#fff;background:rgba(255,255,255,.08)}
.main-nav ul li > a.active{color:#fff;background:rgba(255,255,255,.12);font-weight:700}
.main-nav .dropdown{
  position:absolute;top:calc(100% + 10px);left:0;min-width:228px;
  background:#fff;border-radius:var(--radius-md);padding:10px;
  box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:var(--transition);z-index:200;
}
.main-nav .dropdown::before{
  content:"";position:absolute;top:-6px;left:28px;width:12px;height:12px;
  background:#fff;transform:rotate(45deg);border-radius:2px;
}
.main-nav .dropdown a{
  display:flex;align-items:center;gap:10px;padding:11px 14px;border-radius:10px;
  color:var(--text-main);font-size:14px;font-weight:500;
}
.main-nav .dropdown a i{font-size:13px;color:var(--accent);width:18px;text-align:center}
.main-nav .dropdown a:hover{background:var(--bg-light);color:var(--primary)}
.main-nav ul li:hover .dropdown{
  opacity:1;visibility:visible;transform:translateY(0);
}
.nav-right{display:flex;align-items:center;gap:14px}
.nav-right .btn{padding:11px 24px;font-size:14px}
.mobile-toggle{
  display:none;width:42px;height:42px;border-radius:12px;color:#fff;
  border:1px solid rgba(255,255,255,.18);align-items:center;justify-content:center;
  font-size:18px;transition:var(--transition);
}
.mobile-toggle:hover{background:rgba(255,255,255,.08)}

/* Hero */
.hero{
  position:relative;padding:180px 0 120px;background-size:cover;background-position:center;
  overflow:hidden;isolation:isolate;
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(110deg,rgba(7,15,43,.96) 0%,rgba(10,25,60,.88) 45%,rgba(7,15,43,.62) 100%);
}
.hero::after{
  content:"";position:absolute;right:-160px;top:-160px;width:520px;height:520px;z-index:-1;
  background:radial-gradient(circle,rgba(255,92,51,.30),transparent 65%);
  border-radius:50%;
}
.hero-content{max-width:820px}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:8px 20px;border-radius:999px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.16);
  color:#fff;font-size:13px;font-weight:600;letter-spacing:.5px;margin-bottom:22px;
  backdrop-filter:blur(8px);
}
.hero-badge i{color:var(--cyan);font-size:14px}
.hero h1{
  font-size:52px;font-weight:900;line-height:1.22;color:#fff;letter-spacing:-1px;
  margin-bottom:20px;
}
.hero h1 em{font-style:normal;color:var(--cyan)}
.hero .lead{font-size:17px;color:rgba(255,255,255,.82);line-height:1.85;max-width:680px;margin-bottom:34px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:56px}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  border-top:1px solid rgba(255,255,255,.14);padding-top:38px;
}
.hero-stats .stat{position:relative;padding:0 28px}
.hero-stats .stat:not(:last-child)::after{
  content:"";position:absolute;right:0;top:12%;height:76%;width:1px;background:rgba(255,255,255,.14);
}
.hero-stats .stat strong{display:block;font-size:34px;font-weight:900;color:#fff;line-height:1.15}
.hero-stats .stat span{font-size:14px;color:rgba(255,255,255,.64)}

/* Features */
.features{background:var(--bg-light)}
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-card{
  background:var(--bg-white);border-radius:var(--radius-lg);padding:34px 26px;
  border:1px solid var(--border);box-shadow:var(--shadow-sm);transition:var(--transition);
  position:relative;overflow:hidden;
}
.feature-card::before{
  content:"";position:absolute;top:0;left:0;width:100%;height:4px;
  background:linear-gradient(90deg,var(--accent),var(--cyan));opacity:0;transition:var(--transition);
}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}
.feature-card:hover::before{opacity:1}
.feature-card .icon{
  width:58px;height:58px;border-radius:16px;display:flex;align-items:center;justify-content:center;
  font-size:23px;margin-bottom:20px;background:rgba(255,92,51,.1);color:var(--accent);
}
.feature-card:nth-child(2) .icon{background:rgba(0,212,255,.1);color:#009cc4}
.feature-card:nth-child(3) .icon{background:rgba(90,180,60,.1);color:#4c9e2e}
.feature-card:nth-child(4) .icon{background:rgba(120,90,240,.1);color:#6a4fd6}
.feature-card h3{font-size:19px;font-weight:800;margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--text-body);line-height:1.75}

/* Categories */
.categories-section{background:var(--bg-white)}
.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.category-card{
  border-radius:var(--radius-lg);overflow:hidden;background:var(--bg-white);
  border:1px solid var(--border);box-shadow:var(--shadow-sm);transition:var(--transition);
  display:flex;flex-direction:column;
}
.category-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.category-card .cover{position:relative;height:220px;overflow:hidden}
.category-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.category-card:hover .cover img{transform:scale(1.06)}
.category-card .cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 35%,rgba(7,15,43,.55))}
.category-card .cat-num{
  position:absolute;top:18px;left:18px;z-index:2;background:rgba(7,15,43,.65);
  backdrop-filter:blur(6px);color:#fff;font-size:13px;font-weight:700;
  padding:5px 14px;border-radius:999px;letter-spacing:.5px;
}
.category-card .body{padding:26px 24px 24px;flex:1;display:flex;flex-direction:column}
.category-card .body h3{font-size:20px;font-weight:800;margin-bottom:10px;line-height:1.35}
.category-card .body p{font-size:14px;color:var(--text-body);line-height:1.75;flex:1;margin-bottom:18px}
.category-card .body .more{
  font-size:14px;font-weight:700;color:var(--accent);display:inline-flex;align-items:center;gap:8px;
}
.category-card .body .more i{transition:var(--transition)}
.category-card .body .more:hover i{transform:translateX(4px)}

/* News */
.news-section{background:var(--bg-light)}
.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.news-card{
  display:flex;flex-direction:column;background:var(--bg-white);border-radius:var(--radius-md);
  padding:28px 28px 24px;border:1px solid var(--border);box-shadow:var(--shadow-sm);
  transition:var(--transition);position:relative;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(255,92,51,.3)}
.news-card .news-meta{
  display:flex;align-items:center;gap:12px;margin-bottom:12px;
}
.news-card .news-cat{
  display:inline-block;padding:4px 14px;border-radius:999px;font-size:12px;font-weight:700;
  background:rgba(255,92,51,.1);color:var(--accent);
}
.news-card time{font-size:13px;color:var(--text-muted);display:flex;align-items:center;gap:6px}
.news-card time i{font-size:12px}
.news-card h3{font-size:18px;font-weight:700;line-height:1.45;margin-bottom:10px;color:var(--text-main)}
.news-card p{font-size:14px;color:var(--text-body);line-height:1.7;flex:1}
.news-card:hover h3{color:var(--primary)}
.empty-tip{
  grid-column:1/-1;text-align:center;padding:48px 20px;color:var(--text-muted);
  background:var(--bg-white);border-radius:var(--radius-md);border:1px dashed var(--border);
  font-size:15px;
}

/* Process */
.process-section{
  position:relative;background-size:cover;background-position:center;isolation:isolate;
  padding:96px 0;
}
.process-section::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(120deg,rgba(7,15,43,.96),rgba(20,40,75,.9));
}
.process-section .section-head h2{color:#fff}
.process-section .section-head p{color:rgba(255,255,255,.72)}
.process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;position:relative}
.process-grid::before{
  content:"";position:absolute;top:40px;left:12%;right:12%;height:2px;
  background:linear-gradient(90deg,rgba(255,92,51,.6),rgba(0,212,255,.6));
}
.process-step{text-align:center;position:relative}
.process-step .step-num{
  width:80px;height:80px;border-radius:50%;margin:0 auto 22px;position:relative;z-index:2;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary-light),var(--primary-soft));
  border:2px solid rgba(255,255,255,.1);font-size:26px;font-weight:900;color:#fff;
  box-shadow:0 0 0 8px rgba(255,255,255,.03);
}
.process-step:nth-child(1) .step-num{box-shadow:0 0 0 8px rgba(255,92,51,.15);border-color:var(--accent)}
.process-step:nth-child(2) .step-num{box-shadow:0 0 0 8px rgba(0,212,255,.1);border-color:var(--cyan)}
.process-step:nth-child(3) .step-num{box-shadow:0 0 0 8px rgba(255,255,255,.06)}
.process-step:nth-child(4) .step-num{box-shadow:0 0 0 8px rgba(255,92,51,.12)}
.process-step h3{color:#fff;font-size:17px;font-weight:800;margin-bottom:8px}
.process-step p{color:rgba(255,255,255,.65);font-size:14px;line-height:1.7}

/* Deep stats */
.deep-stats{
  background:linear-gradient(135deg,#070f2b,#12254d 60%,#1a3060);
  padding:80px 0;color:#fff;border-top:1px solid rgba(255,255,255,.06);
}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px}
.stat-card{
  text-align:center;padding:32px 20px;border-radius:var(--radius-lg);
  background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);
  transition:var(--transition);position:relative;overflow:hidden;
}
.stat-card::after{
  content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);
  width:0;height:3px;background:var(--accent);transition:var(--transition);border-radius:3px;
}
.stat-card:hover{transform:translateY(-6px);background:rgba(255,255,255,.07)}
.stat-card:hover::after{width:70%}
.stat-card strong{
  display:block;font-size:42px;font-weight:900;background:linear-gradient(135deg,#fff,#00d4ff);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:6px;
}
.stat-card span{font-size:14px;color:rgba(255,255,255,.65);letter-spacing:.5px}

/* FAQ */
.faq-section{background:var(--bg-white)}
.faq-wrapper{max-width:820px;margin:0 auto}
.faq-wrapper .accordion-item{
  background:var(--bg-light);border-radius:var(--radius-md);border:1px solid var(--border);
  margin-bottom:16px;overflow:hidden;transition:var(--transition);
}
.faq-wrapper .accordion-item.is-active{border-color:rgba(255,92,51,.3);box-shadow:var(--shadow-sm)}
.faq-wrapper .accordion-title{
  display:flex;justify-content:space-between;align-items:center;
  padding:22px 26px;font-size:16px;font-weight:700;color:var(--text-main);
  cursor:pointer;transition:var(--transition);line-height:1.5;
}
.faq-wrapper .accordion-title::after{
  content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;color:var(--accent);
  transition:transform .3s ease;font-size:14px;
}
.faq-wrapper .accordion-item.is-active .accordion-title::after{transform:rotate(180deg)}
.faq-wrapper .accordion-content{
  padding:0 26px 22px;color:var(--text-body);font-size:14px;line-height:1.8;
}

/* CTA */
.cta-section{
  position:relative;padding:100px 0;text-align:center;background-size:cover;background-position:center;
  isolation:isolate;overflow:hidden;
}
.cta-section::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background:linear-gradient(120deg,rgba(7,15,43,.95),rgba(255,92,51,.38));
}
.cta-section .container{position:relative;z-index:2}
.cta-section h2{font-size:40px;font-weight:900;color:#fff;margin-bottom:16px;letter-spacing:-.5px}
.cta-section p{font-size:16px;color:rgba(255,255,255,.8);margin-bottom:36px;max-width:620px;margin-left:auto;margin-right:auto}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-bottom:40px}
.cta-note{font-size:13px;color:rgba(255,255,255,.55)}

/* Footer */
.site-footer{background:#050c1e;color:#8a9ab0;padding:64px 0 0;border-top:1px solid rgba(255,255,255,.05)}
.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.06)}
.footer-brand .logo{margin-bottom:18px}
.footer-brand p{font-size:14px;line-height:1.8;max-width:340px}
.footer-col h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:18px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:14px;transition:var(--transition)}
.footer-col ul li a:hover{color:#fff;padding-left:5px}
.footer-bottom{
  padding:24px 0;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;
  font-size:13px;color:rgba(255,255,255,.4);
}
.footer-bottom-links{display:flex;gap:22px}
.footer-bottom-links a{font-size:13px;color:rgba(255,255,255,.4)}
.footer-bottom-links a:hover{color:#fff}

/* 响应式 */
@media (max-width:1024px){
  .hero{padding:150px 0 90px}
  .hero h1{font-size:40px}
  .feature-grid{grid-template-columns:1fr 1fr}
  .process-grid::before{display:none}
  .process-grid{grid-template-columns:1fr 1fr;gap:40px 24px}
  .stats-grid{grid-template-columns:1fr 1fr}
  .category-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr 1fr}
  .main-nav{
    position:fixed;top:0;right:-110%;width:320px;height:100vh;background:#0a142c;
    box-shadow:var(--shadow-lg);transition:right .4s ease;padding:30px 20px;z-index:2000;
    overflow-y:auto;border-left:1px solid rgba(255,255,255,.08);
  }
  .main-nav.open{right:0}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:6px;margin-top:20px}
  .main-nav ul li > a{font-size:16px;padding:13px 16px;color:rgba(255,255,255,.85)}
  .main-nav .dropdown{
    position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;
    margin-left:14px;padding:6px 0 6px 16px;border-left:2px solid var(--accent);border-radius:0;
    background:transparent;min-width:0;
  }
  .main-nav .dropdown::before{display:none}
  .main-nav .dropdown a{color:rgba(255,255,255,.65);padding:9px 12px}
  .main-nav .dropdown a:hover{background:rgba(255,255,255,.06);color:#fff}
  .mobile-toggle{display:flex}
  .nav-backdrop{
    position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:1500;opacity:0;visibility:hidden;
    transition:var(--transition);
  }
  .nav-backdrop.show{opacity:1;visibility:visible}
}
@media (max-width:768px){
  .section{padding:72px 0}
  .section-head h2{font-size:30px}
  .hero h1{font-size:32px}
  .hero .lead{font-size:15px}
  .hero-stats{grid-template-columns:1fr;gap:24px}
  .hero-stats .stat:not(:last-child)::after{display:none}
  .hero-stats .stat{padding:16px 0;text-align:center}
  .hero-stats .stat strong{font-size:28px}
  .stats-grid{grid-template-columns:1fr 1fr;gap:16px}
  .stat-card strong{font-size:32px}
  .category-grid{grid-template-columns:1fr}
  .cta-section h2{font-size:30px}
  .footer-top{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;text-align:center}
  .news-card{padding:22px}
  .process-grid{grid-template-columns:1fr 1fr;gap:28px 16px}
  .process-step .step-num{width:62px;height:62px;font-size:20px;margin-bottom:16px}
}
@media (max-width:520px){
  .container{padding:0 20px}
  .hero h1{font-size:28px}
  .hero-actions .btn{width:100%}
  .feature-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr}
  .process-grid{grid-template-columns:1fr}
  .logo{font-size:17px}
  .btn{padding:13px 24px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important}
}

/* roulang page: category1 */
:root {
      --primary: #1a56db;
      --primary-dark: #1e40af;
      --primary-light: #3b82f6;
      --accent: #f59e0b;
      --accent-dark: #d97706;
      --bg: #f8fafc;
      --bg-dark: #0f172a;
      --card-bg: #ffffff;
      --text: #1e293b;
      --text-muted: #64748b;
      --border: #e2e8f0;
      --radius: 16px;
      --radius-sm: 10px;
      --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 12px 36px rgba(15, 23, 42, 0.12);
      --space: 90px;
      --transition: all 0.3s ease;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.75;
      font-size: 16px;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.3s;
    }

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

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

    .grid-container {
      max-width: 1200px;
    }

    /* ==================== 导航 ==================== */
    .site-header {
      background: var(--bg-dark);
      position: sticky;
      top: 0;
      z-index: 1000;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 24px;
      max-width: 1280px;
      margin: 0 auto;
      gap: 24px;
    }

    .logo {
      font-size: 19px;
      font-weight: 800;
      color: #ffffff;
      letter-spacing: 0.4px;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      white-space: nowrap;
    }

    .logo i {
      color: var(--accent);
      font-size: 22px;
    }

    .logo:hover {
      color: #ffffff;
      opacity: 0.92;
    }

    .main-nav ul {
      display: flex;
      gap: 6px;
      align-items: center;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .main-nav > ul > li {
      position: relative;
      margin: 0;
    }

    .main-nav > ul > li > a {
      display: flex;
      align-items: center;
      gap: 6px;
      color: rgba(255, 255, 255, 0.85);
      padding: 10px 15px;
      border-radius: 8px;
      font-weight: 500;
      font-size: 15px;
      transition: all 0.3s;
      line-height: 1.4;
    }

    .main-nav > ul > li > a:hover,
    .main-nav > ul > li > a.active {
      background: rgba(59, 130, 246, 0.22);
      color: #ffffff;
    }

    .main-nav .dropdown {
      position: absolute;
      top: calc(100% + 6px);
      left: 0;
      min-width: 230px;
      background: #ffffff;
      border-radius: 12px;
      box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
      padding: 8px;
      opacity: 0;
      visibility: hidden;
      transform: translateY(8px);
      transition: all 0.3s;
      z-index: 100;
    }

    .main-nav > ul > li:hover .dropdown,
    .main-nav > ul > li:focus-within .dropdown {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }

    .main-nav .dropdown a {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 10px 14px;
      color: var(--text);
      border-radius: 8px;
      font-size: 14px;
      transition: all 0.3s;
    }

    .main-nav .dropdown a:hover {
      background: #f1f5f9;
      color: var(--primary);
      padding-left: 18px;
    }

    .main-nav .dropdown a i {
      width: 18px;
      text-align: center;
      color: var(--primary);
    }

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      color: #ffffff;
      font-size: 22px;
      cursor: pointer;
      padding: 8px 10px;
      border-radius: 8px;
      transition: background 0.3s;
    }

    .nav-toggle:hover {
      background: rgba(255, 255, 255, 0.1);
    }

    /* ==================== 页面横幅 ==================== */
    .page-banner {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.94), rgba(30, 47, 90, 0.88)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
      color: #ffffff;
      padding: 84px 0 72px;
      text-align: center;
      position: relative;
    }

    .banner-badge {
      display: inline-block;
      background: rgba(245, 158, 11, 0.18);
      border: 1px solid rgba(245, 158, 11, 0.4);
      color: #fbbf24;
      padding: 5px 18px;
      border-radius: 100px;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 2px;
      margin-bottom: 18px;
      text-transform: uppercase;
    }

    .page-banner h1 {
      font-size: 40px;
      font-weight: 800;
      letter-spacing: 1px;
      margin-bottom: 16px;
      line-height: 1.3;
    }

    .page-banner p {
      font-size: 17px;
      color: rgba(255, 255, 255, 0.85);
      max-width: 660px;
      margin: 0 auto;
      line-height: 1.8;
    }

    .banner-breadcrumb {
      margin-top: 24px;
      font-size: 14px;
      color: rgba(255, 255, 255, 0.55);
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

    .banner-breadcrumb a {
      color: rgba(255, 255, 255, 0.85);
      transition: color 0.3s;
    }

    .banner-breadcrumb a:hover {
      color: #fbbf24;
    }

    .banner-breadcrumb i {
      font-size: 12px;
      color: rgba(255, 255, 255, 0.4);
    }

    /* ==================== 通用区块 ==================== */
    .section {
      padding: var(--space) 0;
    }

    .section-alt {
      background: #ffffff;
    }

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

    .section-tag {
      display: inline-block;
      background: rgba(26, 86, 219, 0.1);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      padding: 4px 16px;
      border-radius: 100px;
      letter-spacing: 1px;
      margin-bottom: 12px;
    }

    .section-header h2 {
      font-size: 32px;
      font-weight: 800;
      color: var(--text);
      margin-bottom: 8px;
      line-height: 1.3;
    }

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

    /* ==================== 概览 ==================== */
    .entry-overview {
      display: flex;
      align-items: center;
      gap: 50px;
    }

    .overview-content {
      flex: 1;
    }

    .overview-content h3 {
      font-size: 26px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text);
    }

    .overview-content p {
      color: var(--text-muted);
      font-size: 15px;
      margin-bottom: 18px;
      line-height: 1.85;
    }

    .overview-points {
      margin-top: 24px;
      display: grid;
      gap: 14px;
    }

    .overview-points li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 14px 16px;
      background: var(--bg);
      border-radius: 12px;
      font-size: 15px;
      box-shadow: 0 1px 4px rgba(0, 0, 0, 0.02);
    }

    .overview-points li i {
      color: var(--primary);
      font-size: 18px;
      margin-top: 3px;
      min-width: 18px;
    }

    .overview-image {
      flex: 1;
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .overview-image::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(15, 23, 42, 0) 60%, rgba(15, 23, 42, 0.18));
      pointer-events: none;
    }

    .overview-image img {
      width: 100%;
      display: block;
    }

    /* ==================== 步骤流程 ==================== */
    .steps-section {
      background: #ffffff;
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

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

    .step-card {
      background: var(--card-bg);
      border-radius: var(--radius);
      padding: 32px 28px;
      border: 1px solid var(--border);
      transition: all 0.3s;
      position: relative;
      box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
      height: 100%;
    }

    .step-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(26, 86, 219, 0.3);
    }

    .step-number {
      width: 48px;
      height: 48px;
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      color: #ffffff;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 20px;
      box-shadow: 0 6px 16px rgba(26, 86, 219, 0.25);
    }

    .step-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text);
    }

    .step-card p {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.8;
      margin: 0;
    }

    /* ==================== 下载渠道 ==================== */
    .download-channels {
      background: linear-gradient(145deg, #101c33, #16233e);
      padding: var(--space) 0;
      position: relative;
      overflow: hidden;
    }

    .download-channels::before {
      content: '';
      position: absolute;
      top: -100px;
      left: -100px;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(59, 130, 246, 0.08), transparent 70%);
      border-radius: 50%;
    }

    .download-channels .section-header h2 {
      color: #ffffff;
    }

    .download-channels .section-header p {
      color: rgba(255, 255, 255, 0.7);
    }

    .download-channels .section-tag {
      background: rgba(245, 158, 11, 0.15);
      color: #fbbf24;
    }

    .channel-cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      position: relative;
      z-index: 1;
    }

    .channel-card {
      background: rgba(255, 255, 255, 0.07);
      border: 1px solid rgba(255, 255, 255, 0.14);
      border-radius: var(--radius);
      padding: 32px 24px;
      text-align: center;
      backdrop-filter: blur(8px);
      transition: all 0.3s;
      height: 100%;
    }

    .channel-card:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: rgba(245, 158, 11, 0.4);
      transform: translateY(-4px);
    }

    .channel-card i {
      font-size: 36px;
      color: var(--accent);
      margin-bottom: 18px;
      display: block;
    }

    .channel-card h3 {
      color: #ffffff;
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 8px;
    }

    .channel-card p {
      color: rgba(255, 255, 255, 0.7);
      font-size: 14px;
      line-height: 1.75;
      margin: 0;
    }

    /* ==================== 安全验证 ==================== */
    .security-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-bottom: 40px;
    }

    .security-item {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 26px 24px;
      display: flex;
      gap: 16px;
      align-items: flex-start;
      transition: all 0.3s;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

    .security-item:hover {
      box-shadow: var(--shadow);
      border-color: rgba(26, 86, 219, 0.25);
      transform: translateY(-2px);
    }

    .security-item .icon-wrap {
      width: 48px;
      height: 48px;
      min-width: 48px;
      background: rgba(26, 86, 219, 0.1);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .security-item .icon-wrap i {
      font-size: 20px;
      color: var(--primary);
    }

    .security-item h3 {
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text);
    }

    .security-item p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin: 0;
    }

    /* ==================== 数据统计 ==================== */
    .stats-section {
      background: var(--bg);
      border-top: 1px solid var(--border);
    }

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

    .stat-card {
      text-align: center;
      padding: 28px 20px;
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
      transition: all 0.3s;
    }

    .stat-card:hover {
      box-shadow: var(--shadow);
      transform: translateY(-3px);
    }

    .stat-num {
      font-size: 36px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
      margin-top: 6px;
    }

    /* ==================== FAQ ==================== */
    .faq-section {
      background: #ffffff;
    }

    .faq-list {
      max-width: 800px;
      margin: 0 auto;
      display: grid;
      gap: 14px;
    }

    .faq-item {
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      overflow: hidden;
      background: var(--bg);
      transition: all 0.3s;
    }

    .faq-item:hover {
      border-color: rgba(26, 86, 219, 0.25);
    }

    .faq-item summary {
      cursor: pointer;
      padding: 18px 24px;
      font-weight: 600;
      font-size: 15px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      list-style: none;
      user-select: none;
      outline: none;
      color: var(--text);
    }

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

    .faq-item summary::after {
      content: '+';
      font-size: 22px;
      font-weight: 400;
      color: var(--primary);
      min-width: 24px;
      text-align: center;
      transition: transform 0.3s;
    }

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

    .faq-item .faq-answer {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
    }

    .faq-item .faq-answer a {
      color: var(--primary);
      font-weight: 500;
    }

    .faq-item .faq-answer a:hover {
      text-decoration: underline;
    }

    /* ==================== CTA ==================== */
    .cta-section {
      background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
      padding: 72px 0;
      text-align: center;
      color: #ffffff;
      position: relative;
      overflow: hidden;
    }

    .cta-section::before {
      content: '';
      position: absolute;
      top: -60%;
      right: -15%;
      width: 420px;
      height: 420px;
      background: radial-gradient(circle, rgba(255, 255, 255, 0.12), transparent 70%);
      border-radius: 50%;
    }

    .cta-section::after {
      content: '';
      position: absolute;
      bottom: -40%;
      left: -10%;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(255, 255, 255, 0.08), transparent 70%);
      border-radius: 50%;
    }

    .cta-section h2 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 12px;
      position: relative;
      z-index: 1;
    }

    .cta-section p {
      font-size: 16px;
      opacity: 0.9;
      max-width: 580px;
      margin: 0 auto 32px;
      position: relative;
      z-index: 1;
      line-height: 1.8;
    }

    .cta-buttons {
      position: relative;
      z-index: 1;
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .btn {
      display: inline-block;
      padding: 14px 34px;
      border-radius: 12px;
      font-weight: 600;
      font-size: 15px;
      border: none;
      cursor: pointer;
      transition: all 0.3s;
      text-align: center;
    }

    .btn-white {
      background: #ffffff;
      color: var(--primary);
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    }

    .btn-white:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22);
      color: var(--primary-dark);
    }

    .btn-outline-light {
      background: transparent;
      color: #ffffff;
      border: 2px solid rgba(255, 255, 255, 0.7);
      padding: 12px 32px;
    }

    .btn-outline-light:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: #ffffff;
      transform: translateY(-3px);
    }

    /* ==================== 页脚 ==================== */
    .site-footer {
      background: var(--bg-dark);
      color: rgba(255, 255, 255, 0.8);
      padding: 60px 0 0;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 48px;
      padding-bottom: 40px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .footer-brand .logo {
      font-size: 18px;
      margin-bottom: 14px;
      display: inline-flex;
    }

    .footer-brand p {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.6);
      line-height: 1.8;
      max-width: 360px;
      margin: 0;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 18px;
    }

    .footer-col ul {
      display: grid;
      gap: 10px;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .footer-col ul a {
      color: rgba(255, 255, 255, 0.6);
      font-size: 14px;
      transition: all 0.3s;
    }

    .footer-col ul a:hover {
      color: #ffffff;
      padding-left: 4px;
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 20px 0;
      font-size: 13px;
      color: rgba(255, 255, 255, 0.45);
      flex-wrap: wrap;
      gap: 12px;
    }

    .footer-bottom-links {
      display: flex;
      gap: 16px;
      align-items: center;
    }

    .footer-bottom-links a {
      color: rgba(255, 255, 255, 0.6);
      transition: color 0.3s;
    }

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

    /* ==================== 响应式 ==================== */
    @media (max-width: 1024px) {
      :root {
        --space: 72px;
      }

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

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

      .entry-overview {
        gap: 36px;
      }
    }

    @media (max-width: 768px) {
      .header-inner {
        flex-wrap: wrap;
        padding: 12px 16px;
      }

      .nav-toggle {
        display: block;
      }

      .main-nav {
        display: none;
        width: 100%;
        order: 3;
      }

      .main-nav.open {
        display: block;
        padding-top: 8px;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
      }

      .main-nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
      }

      .main-nav > ul > li {
        width: 100%;
      }

      .main-nav > ul > li > a {
        width: 100%;
        justify-content: space-between;
        padding: 12px 14px;
      }

      .main-nav .dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: rgba(255, 255, 255, 0.05);
        border-radius: 8px;
        margin: 0 0 6px 14px;
        padding: 6px;
        display: none;
        min-width: auto;
      }

      .main-nav > ul > li.open .dropdown {
        display: block;
      }

      .entry-overview {
        flex-direction: column;
      }

      .entry-overview .overview-image {
        width: 100%;
      }

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

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

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

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

    @media (max-width: 520px) {
      :root {
        --space: 55px;
      }

      .header-inner {
        padding: 10px 14px;
      }

      .logo {
        font-size: 15px;
      }

      .logo i {
        font-size: 18px;
      }

      .page-banner {
        padding: 56px 0 48px;
      }

      .page-banner h1 {
        font-size: 24px;
      }

      .page-banner p {
        font-size: 15px;
      }

      .steps-grid,
      .channel-cards,
      .security-list {
        grid-template-columns: 1fr;
      }

      .stats-row {
        grid-template-columns: 1fr 1fr;
        gap: 14px;
      }

      .stat-num {
        font-size: 28px;
      }

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

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

      .cta-buttons {
        flex-direction: column;
        align-items: center;
      }

      .btn {
        width: 100%;
        max-width: 280px;
      }
    }

/* roulang page: article */
:root {
            --primary: #4361ee;
            --primary-2: #3a0ca3;
            --secondary: #f72585;
            --accent: #4cc9f0;
            --dark: #0b0f19;
            --dark-2: #12182b;
            --bg: #f4f6fb;
            --bg-light: #eef1f8;
            --card: #ffffff;
            --text: #0f172a;
            --text-weak: #64748b;
            --text-invert: #f8fafc;
            --border: #e2e8f0;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 22px;
            --shadow: 0 4px 24px rgba(2, 6, 23, 0.07);
            --shadow-lg: 0 14px 44px rgba(2, 6, 23, 0.12);
            --shadow-cta: 0 8px 30px rgba(67, 97, 238, 0.35);
            --transition: all 0.3s ease;
            --container: 1200px;
            --gradient-main: linear-gradient(135deg, #4361ee 0%, #3a0ca3 100%);
            --gradient-hot: linear-gradient(135deg, #4361ee 0%, #f72585 100%);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a:hover {
            color: var(--primary-2);
            text-decoration: none;
        }

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

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

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

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

        .section-head h2 {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 10px;
            color: var(--text);
            line-height: 1.25;
        }

        .section-head p {
            color: var(--text-weak);
            font-size: 1.05rem;
            max-width: 640px;
        }

        .section-head.center p {
            margin: 0 auto;
        }

        .section-tag {
            display: inline-block;
            background: var(--gradient-hot);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 700;
            padding: 5px 16px;
            border-radius: 100px;
            margin-bottom: 14px;
            letter-spacing: 0.04em;
        }

        .section-tag.light {
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 32px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.98rem;
            line-height: 1.4;
            border: 2px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }

        .btn i {
            font-size: 1rem;
        }

        .btn-primary {
            background: var(--gradient-hot);
            color: #fff !important;
            border-color: transparent;
            box-shadow: var(--shadow-cta);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 36px rgba(247, 37, 133, 0.4);
            color: #fff !important;
        }

        .btn-outline-light {
            background: transparent;
            color: #fff !important;
            border-color: rgba(255, 255, 255, 0.35);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.6);
            transform: translateY(-2px);
        }

        .btn-light {
            background: #fff;
            color: var(--primary) !important;
            box-shadow: 0 4px 18px rgba(0, 0, 0, 0.15);
        }

        .btn-light:hover {
            background: var(--bg-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: var(--bg-light);
            color: var(--primary);
            border: 1px solid rgba(67, 97, 238, 0.12);
            padding: 4px 12px;
            border-radius: 100px;
            font-size: 0.78rem;
            font-weight: 600;
        }

        .badge-sm {
            font-size: 0.7rem;
            padding: 3px 10px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 999;
            background: rgba(11, 15, 25, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

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

        .logo {
            font-size: 1.18rem;
            font-weight: 800;
            color: #fff !important;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 10px;
            line-height: 1.3;
        }

        .logo i {
            background: var(--gradient-hot);
            width: 34px;
            height: 34px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            color: #fff;
            font-size: 0.95rem;
            flex-shrink: 0;
        }

        .main-nav ul {
            list-style: none;
            display: flex;
            gap: 6px;
            margin: 0;
            padding: 0;
        }

        .main-nav li {
            position: relative;
        }

        .main-nav li > a {
            color: rgba(255, 255, 255, 0.78);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 26px 16px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border-bottom: 2px solid transparent;
            transition: var(--transition);
        }

        .main-nav li > a i.fa-chevron-down {
            font-size: 0.7rem;
            opacity: 0.7;
        }

        .main-nav li > a:hover {
            color: #fff;
        }

        .main-nav li > a.active {
            color: #fff;
            border-bottom-color: var(--secondary);
        }

        .main-nav .dropdown {
            position: absolute;
            top: 100%;
            left: 0;
            min-width: 220px;
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
            padding: 8px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(12px);
            transition: var(--transition);
            z-index: 100;
            border: 1px solid rgba(226, 232, 240, 0.6);
        }

        .main-nav li:hover .dropdown,
        .main-nav li:focus-within .dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(4px);
        }

        .main-nav .dropdown a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 14px;
            border-radius: var(--radius-sm);
            color: var(--text);
            font-size: 0.88rem;
            font-weight: 500;
        }

        .main-nav .dropdown a i {
            width: 30px;
            height: 30px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-light);
            color: var(--primary);
            border-radius: 8px;
            font-size: 0.82rem;
            transition: var(--transition);
        }

        .main-nav .dropdown a:hover {
            background: var(--bg-light);
            color: var(--primary);
        }

        .main-nav .dropdown a:hover i {
            background: var(--primary);
            color: #fff;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .header-cta {
            background: var(--gradient-hot);
            color: #fff !important;
            padding: 10px 22px;
            border-radius: 100px;
            font-size: 0.88rem;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(247, 37, 133, 0.3);
            transition: var(--transition);
            text-decoration: none;
        }

        .header-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(247, 37, 133, 0.4);
        }

        .menu-toggle {
            display: none;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: #fff;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            font-size: 1.1rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.16);
        }

        .article-banner {
            position: relative;
            padding: 90px 0 70px;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            color: #fff;
        }

        .article-banner .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 28px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb-sep {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.68rem;
        }

        .breadcrumb .current {
            color: var(--accent);
            max-width: 360px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .article-banner h1 {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.02em;
            max-width: 900px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.85);
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--accent);
            font-size: 0.9rem;
        }

        .article-meta .badge {
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.2);
            font-size: 0.78rem;
            padding: 4px 14px;
        }

        .article-section {
            padding: 60px 0 70px;
        }

        .article-body {
            background: var(--card);
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(226, 232, 240, 0.7);
            position: relative;
            margin-top: -10px;
        }

        .article-cover {
            border-radius: var(--radius);
            overflow: hidden;
            margin-bottom: 32px;
            position: relative;
        }

        .article-cover img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            border-radius: var(--radius);
        }

        .article-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 0%, rgba(11, 15, 25, 0.15) 100%);
            border-radius: var(--radius);
            pointer-events: none;
        }

        .article-content {
            font-size: 1.05rem;
            line-height: 1.95;
            color: var(--text);
        }

        .article-content p {
            margin-bottom: 1.5em;
        }

        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 2em 0 0.8em;
            color: var(--text);
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 1.22rem;
            font-weight: 700;
            margin: 1.8em 0 0.7em;
            color: var(--text);
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 1.5em;
            padding-left: 1.5em;
        }

        .article-content li {
            margin-bottom: 0.6em;
        }

        .article-content img {
            border-radius: var(--radius);
            margin: 1.2em 0;
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg-light);
            padding: 16px 24px;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 1.5em 0;
            color: var(--text-weak);
        }

        .article-content a {
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            padding-top: 28px;
            margin-top: 36px;
            border-top: 1px solid var(--border);
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-light);
            color: var(--text-weak);
            padding: 6px 14px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 500;
            transition: var(--transition);
        }

        .tag:hover {
            background: var(--primary);
            color: #fff;
        }

        .tag i {
            font-size: 0.72rem;
        }

        .article-highlight {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 36px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
        }

        .hl-stat {
            background: linear-gradient(135deg, var(--dark) 0%, #1a1040 100%);
            border-radius: var(--radius);
            padding: 22px 18px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .hl-stat::before {
            content: '';
            position: absolute;
            top: -30px;
            right: -30px;
            width: 70px;
            height: 70px;
            border-radius: 50%;
            background: rgba(76, 201, 240, 0.15);
        }

        .hl-num {
            display: block;
            font-size: 1.9rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent), #fff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }

        .hl-label {
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }

        .empty-box {
            text-align: center;
            padding: 80px 20px;
        }

        .empty-box i {
            font-size: 3rem;
            color: var(--border);
            margin-bottom: 18px;
        }

        .empty-box h2 {
            font-size: 1.6rem;
            margin-bottom: 10px;
        }

        .empty-box p {
            color: var(--text-weak);
            margin-bottom: 28px;
        }

        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .side-card {
            background: var(--card);
            border-radius: var(--radius);
            padding: 26px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(226, 232, 240, 0.6);
        }

        .side-card-head {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 20px;
        }

        .side-card-head i {
            width: 32px;
            height: 32px;
            background: var(--gradient-hot);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 9px;
            font-size: 0.85rem;
        }

        .side-news-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .side-news-list li {
            border-bottom: 1px dashed var(--border);
            padding: 12px 0;
        }

        .side-news-list li:first-child {
            padding-top: 0;
        }

        .side-news-list li:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .side-news-list a {
            display: block;
            color: var(--text);
        }

        .side-news-title {
            font-size: 0.92rem;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: var(--transition);
        }

        .side-news-list a:hover .side-news-title {
            color: var(--primary);
        }

        .side-news-meta {
            display: flex;
            gap: 12px;
            font-size: 0.75rem;
            color: var(--text-weak);
        }

        .side-card-cta {
            background: var(--gradient-main);
            color: #fff;
            text-align: center;
            border: none;
            position: relative;
            overflow: hidden;
        }

        .side-card-cta::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 100px;
            height: 100px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }

        .side-card-cta h3 {
            font-size: 1.2rem;
            margin-bottom: 8px;
            position: relative;
        }

        .side-card-cta p {
            font-size: 0.86rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 18px;
            position: relative;
        }

        .related-section {
            padding: 70px 0;
            background: var(--bg-light);
        }

        .news-card {
            display: block;
            background: var(--card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(226, 232, 240, 0.6);
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
            color: var(--text);
        }

        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            color: var(--text);
        }

        .news-cover {
            height: 190px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .news-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(11, 15, 25, 0.35) 100%);
        }

        .news-body {
            padding: 24px;
        }

        .news-body .badge {
            margin-bottom: 12px;
        }

        .news-body h3 {
            font-size: 1.08rem;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-body p {
            font-size: 0.88rem;
            color: var(--text-weak);
            line-height: 1.65;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.78rem;
            color: var(--text-weak);
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

        .read-more {
            color: var(--primary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .faq-section {
            padding: 70px 0;
            background: var(--bg);
        }

        .accordion {
            list-style: none;
            margin: 0 !important;
            background: transparent !important;
            max-width: 860px;
            margin: 0 auto !important;
        }

        .accordion-item {
            background: var(--card) !important;
            border: 1px solid var(--border) !important;
            border-radius: var(--radius) !important;
            margin-bottom: 14px !important;
            overflow: hidden;
            transition: var(--transition);
            box-shadow: 0 2px 10px rgba(2, 6, 23, 0.03);
        }

        .accordion-item:hover {
            border-color: rgba(67, 97, 238, 0.3) !important;
            box-shadow: var(--shadow);
        }

        .accordion-item.is-active {
            border-color: rgba(67, 97, 238, 0.25) !important;
            box-shadow: var(--shadow);
        }

        .accordion-title {
            background: var(--card) !important;
            color: var(--text) !important;
            padding: 20px 24px !important;
            font-size: 1rem !important;
            font-weight: 600 !important;
            border: none !important;
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: relative;
        }

        .accordion-title::before {
            display: none !important;
        }

        .accordion-title::after {
            content: '+';
            font-size: 1.5rem;
            font-weight: 400;
            color: var(--primary);
            transition: var(--transition);
            background: var(--bg-light);
            width: 32px;
            height: 32px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            flex-shrink: 0;
            margin-left: 12px;
        }

        .accordion-item.is-active .accordion-title::after {
            content: '−';
            background: var(--primary);
            color: #fff;
        }

        .accordion-title:hover {
            color: var(--primary) !important;
        }

        .accordion-content {
            padding: 0 24px 22px !important;
            border: none !important;
            background: var(--card) !important;
            color: var(--text-weak);
            line-height: 1.8;
            font-size: 0.95rem;
        }

        .cta-section {
            padding: 70px 0;
            background: linear-gradient(135deg, var(--dark) 0%, #140a32 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(76, 201, 240, 0.08);
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -120px;
            left: 50%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(247, 37, 133, 0.06);
        }

        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 50px;
            position: relative;
            z-index: 2;
        }

        .cta-content {
            flex: 1;
        }

        .cta-content h2 {
            font-size: 2.1rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -0.02em;
            line-height: 1.3;
        }

        .cta-content p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.05rem;
            margin-bottom: 28px;
            max-width: 480px;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .cta-stats {
            display: flex;
            gap: 16px;
            flex-shrink: 0;
        }

        .stat-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius);
            padding: 28px 22px;
            text-align: center;
            min-width: 110px;
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }

        .stat-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }

        .stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            display: block;
        }

        .stat-label {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 6px;
        }

        .site-footer {
            background: #0a0e1a;
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 50px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo {
            margin-bottom: 16px;
            font-size: 1.1rem;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

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

        .footer-col ul a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-col ul a::before {
            content: '';
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--secondary);
            display: inline-block;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 22px 0;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .footer-bottom-links a {
            color: rgba(255, 255, 255, 0.5);
        }

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

        .footer-bottom-links span {
            color: var(--secondary);
            font-weight: 600;
        }

        @media (max-width: 1024px) {
            .main-nav ul {
                gap: 0;
            }
            .cta-inner {
                flex-direction: column;
                text-align: center;
            }
            .cta-content p {
                margin: 0 auto 28px;
            }
            .cta-actions {
                justify-content: center;
            }
            .cta-stats {
                justify-content: center;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                min-height: 64px;
            }
            .menu-toggle {
                display: inline-flex;
            }
            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--dark);
                padding: 16px;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.4s ease;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }
            .main-nav.open {
                max-height: 520px;
                overflow-y: auto;
            }
            .main-nav ul {
                flex-direction: column;
                gap: 0;
            }
            .main-nav li > a {
                padding: 14px 16px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
                width: 100%;
                border-left: 3px solid transparent;
            }
            .main-nav li > a.active {
                border-bottom-color: transparent;
                border-left-color: var(--secondary);
            }
            .main-nav .dropdown {
                position: static;
                opacity: 1;
                visibility: visible;
                transform: none;
                box-shadow: none;
                background: rgba(255, 255, 255, 0.04);
                border: none;
                margin: 0 0 8px 16px;
                min-width: 0;
            }
            .main-nav .dropdown a {
                color: rgba(255, 255, 255, 0.8);
            }
            .header-cta {
                display: none;
            }
            .article-banner {
                padding: 60px 0 50px;
            }
            .article-body {
                padding: 24px;
            }
            .article-cover img {
                height: 220px;
            }
            .article-highlight {
                grid-template-columns: 1fr;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-stats {
                flex-wrap: wrap;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .section-head h2 {
                font-size: 1.6rem;
            }
            .article-banner h1 {
                font-size: 1.5rem;
            }
            .article-meta {
                gap: 12px;
                font-size: 0.8rem;
            }
            .article-body {
                padding: 18px;
                border-radius: 16px;
            }
            .article-cover img {
                height: 180px;
            }
            .news-cover {
                height: 160px;
            }
            .stat-card {
                min-width: 100%;
            }
            .cta-actions .btn {
                width: 100%;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #0d1b2a;
            --primary-2: #1b263b;
            --primary-3: #243a5e;
            --accent: #ff8c32;
            --accent-2: #00c9a7;
            --bg-light: #f4f7fb;
            --bg-alt: #eef2f8;
            --card-bg: #ffffff;
            --text: #152238;
            --text-muted: #5e6e85;
            --border: #e1e8f0;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow: 0 8px 28px rgba(13, 27, 42, 0.07);
            --shadow-hover: 0 18px 44px rgba(13, 27, 42, 0.14);
            --transition: all 0.3s ease;
            --space-section: 84px;
            --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        button,
        input {
            font-family: inherit;
            border: none;
            background: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

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

        .section-alt {
            background: var(--bg-alt);
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 50px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent);
            background: rgba(255, 140, 50, 0.1);
            padding: 6px 16px;
            border-radius: 40px;
            margin-bottom: 14px;
        }

        .section-head h2 {
            font-size: 34px;
            line-height: 1.3;
            font-weight: 800;
            margin: 0 0 14px;
            color: var(--primary);
            letter-spacing: -0.5px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-muted);
            margin: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 26px;
            border-radius: 50px;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.4;
        }

        .btn i {
            font-size: 14px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 18px rgba(13, 27, 42, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-2);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(13, 27, 42, 0.32);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 6px 18px rgba(255, 140, 50, 0.3);
        }

        .btn-accent:hover {
            background: #f07e1a;
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(255, 140, 50, 0.4);
        }

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

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(13, 27, 42, 0.03);
        }

        .btn-sm {
            padding: 8px 20px;
            font-size: 14px;
        }

        .btn-lg {
            padding: 15px 38px;
            font-size: 16px;
        }

        .btn:focus,
        .menu-toggle:focus,
        a:focus {
            outline: 3px solid rgba(255, 140, 50, 0.5);
            outline-offset: 2px;
        }

        .badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 30px;
            letter-spacing: 0.3px;
        }

        .badge-primary {
            background: rgba(13, 27, 42, 0.1);
            color: var(--primary);
        }

        .badge-accent {
            background: rgba(255, 140, 50, 0.15);
            color: #c45f0a;
        }

        .badge-teal {
            background: rgba(0, 201, 167, 0.15);
            color: #008b76;
        }

        .site-header {
            background: rgba(13, 27, 42, 0.97);
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .header-layout {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            min-height: 74px;
            flex-wrap: wrap;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .brand-logo i {
            color: var(--accent);
            font-size: 18px;
            background: rgba(255, 140, 50, 0.15);
            width: 32px;
            height: 32px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .brand-logo:hover {
            color: #fff;
        }

        .main-nav ul {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
        }

        .main-nav>ul>li {
            position: relative;
            margin: 0;
        }

        .main-nav>ul>li>a {
            display: flex;
            align-items: center;
            gap: 6px;
            color: rgba(255, 255, 255, 0.82);
            font-size: 15px;
            font-weight: 600;
            padding: 10px 16px;
            border-radius: 8px;
            transition: var(--transition);
        }

        .main-nav>ul>li>a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.1);
        }

        .main-nav>ul>li.active>a {
            color: #fff;
            background: rgba(255, 140, 50, 0.18);
        }

        .main-nav>ul>li>a i.fa-chevron-down {
            font-size: 11px;
            margin-left: 2px;
            opacity: 0.7;
        }

        .dropdown {
            position: absolute;
            top: 100%;
            left: 0;
            min-width: 220px;
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: 0 18px 45px rgba(0, 0, 0, 0.15);
            padding: 10px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(12px);
            transition: var(--transition);
            z-index: 500;
            border: 1px solid var(--border);
        }

        .main-nav>ul>li:hover .dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(4px);
        }

        .dropdown a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            border-radius: 8px;
            color: var(--text);
            font-size: 14px;
            font-weight: 500;
        }

        .dropdown a i {
            width: 18px;
            text-align: center;
            color: var(--accent);
        }

        .dropdown a:hover {
            background: var(--bg-light);
            color: var(--primary);
            transform: translateX(3px);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .menu-toggle {
            display: none;
            color: #fff;
            font-size: 22px;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            cursor: pointer;
            background: rgba(255, 255, 255, 0.1);
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.18);
        }

        .page-hero {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 100px 0 80px;
            color: #fff;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 27, 42, 0.88) 20%, rgba(13, 27, 42, 0.42) 60%, rgba(255, 140, 50, 0.15) 100%);
        }

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

        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
        }

        .hero-eyebrow i {
            color: var(--accent);
        }

        .page-hero h1 {
            font-size: 44px;
            font-weight: 900;
            line-height: 1.25;
            margin: 0 0 16px;
            letter-spacing: -0.5px;
        }

        .page-hero .hero-sub {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.82);
            max-width: 580px;
            margin: 0 0 36px;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            max-width: 720px;
        }

        .hero-stat {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            backdrop-filter: blur(6px);
        }

        .hero-stat .num {
            font-size: 26px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .hero-stat .label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.72);
            margin-top: 4px;
        }

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

        .feature-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 34px 28px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
            background: rgba(255, 140, 50, 0.12);
            color: var(--accent);
        }

        .feature-card:nth-child(2) .feature-icon {
            background: rgba(0, 201, 167, 0.12);
            color: var(--accent-2);
        }

        .feature-card:nth-child(3) .feature-icon {
            background: rgba(13, 27, 42, 0.1);
            color: var(--primary);
        }

        .feature-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin: 0 0 10px;
            color: var(--primary);
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.65;
        }

        .timeline {
            position: relative;
            max-width: 780px;
            margin: 0 auto;
            padding: 10px 0;
        }

        .timeline::before {
            content: "";
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 3px;
            transform: translateX(-50%);
            background: linear-gradient(180deg, rgba(255, 140, 50, 0.4), rgba(0, 201, 167, 0.4));
            border-radius: 3px;
        }

        .timeline-item {
            position: relative;
            width: 50%;
            padding: 0 40px 40px;
        }

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

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

        .timeline-dot {
            position: absolute;
            top: 6px;
            width: 16px;
            height: 16px;
            background: var(--accent);
            border: 4px solid #fff;
            border-radius: 50%;
            box-shadow: 0 0 0 3px rgba(255, 140, 50, 0.35);
            z-index: 2;
        }

        .timeline-item:nth-child(odd) .timeline-dot {
            right: -9px;
        }

        .timeline-item:nth-child(even) .timeline-dot {
            left: -8px;
        }

        .timeline-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 24px 26px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .timeline-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .timeline-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 8px;
            flex-wrap: wrap;
            justify-content: flex-end;
        }

        .timeline-item:nth-child(even) .timeline-meta {
            justify-content: flex-start;
        }

        .timeline-ver {
            font-size: 17px;
            font-weight: 800;
            color: var(--primary);
        }

        .timeline-date {
            font-size: 13px;
            color: var(--text-muted);
        }

        .timeline-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin: 6px 0 8px;
            color: var(--primary);
        }

        .timeline-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0 0 12px;
            line-height: 1.65;
        }

        .timeline-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            justify-content: flex-end;
        }

        .timeline-item:nth-child(even) .timeline-tags {
            justify-content: flex-start;
        }

        .mini-tag {
            font-size: 12px;
            font-weight: 600;
            background: var(--bg-light);
            padding: 4px 10px;
            border-radius: 30px;
            color: var(--text-muted);
            border: 1px solid var(--border);
        }

        .type-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }

        .type-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 30px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
            text-align: center;
        }

        .type-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .type-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 18px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            background: var(--primary);
            color: #fff;
        }

        .type-card:nth-child(2) .type-icon {
            background: var(--accent);
        }

        .type-card:nth-child(3) .type-icon {
            background: var(--accent-2);
        }

        .type-card:nth-child(4) .type-icon {
            background: #7b6cf6;
        }

        .type-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin: 0 0 8px;
            color: var(--primary);
        }

        .type-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.6;
        }

        .stats-dark {
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 0;
            color: #fff;
            position: relative;
        }

        .stats-dark::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(13, 27, 42, 0.85);
        }

        .stats-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
        }

        .stat-box {
            text-align: center;
            padding: 24px 18px;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .stat-box .stat-num {
            font-size: 42px;
            font-weight: 900;
            line-height: 1.2;
            background: linear-gradient(135deg, #ff8c32, #ffc97a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .stat-box:nth-child(2) .stat-num {
            background: linear-gradient(135deg, #00c9a7, #7df0db);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .stat-box:nth-child(3) .stat-num {
            background: linear-gradient(135deg, #7b6cf6, #c2b8ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .stat-box:nth-child(4) .stat-num {
            background: linear-gradient(135deg, #f0a5b5, #ffd6de);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .stat-box .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 8px;
        }

        .steps-wrap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            counter-reset: step;
        }

        .step-card {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 34px 30px;
            box-shadow: var(--shadow);
            position: relative;
            transition: var(--transition);
        }

        .step-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }

        .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            background: var(--primary);
            color: #fff;
            margin-bottom: 20px;
        }

        .step-card:nth-child(2) .step-num {
            background: var(--accent);
        }

        .step-card:nth-child(3) .step-num {
            background: var(--accent-2);
        }

        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin: 0 0 10px;
            color: var(--primary);
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: 0 3px 12px rgba(13, 27, 42, 0.04);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(255, 140, 50, 0.4);
        }

        .faq-item summary {
            cursor: pointer;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 14px;
            list-style: none;
        }

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

        .faq-item summary i {
            color: var(--accent);
            font-size: 16px;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: rgba(255, 140, 50, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .faq-item summary .faq-icon {
            margin-left: auto;
            font-size: 14px;
            color: var(--text-muted);
            transition: transform 0.3s ease;
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(180deg);
        }

        .faq-item .faq-body {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        .cta-section {
            background: linear-gradient(135deg, var(--primary), var(--primary-3));
            padding: 70px 0;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            width: 340px;
            height: 340px;
            border-radius: 50%;
            background: rgba(255, 140, 50, 0.2);
            top: -160px;
            right: -100px;
        }

        .cta-section::after {
            content: "";
            position: absolute;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(0, 201, 167, 0.15);
            bottom: -120px;
            left: -80px;
        }

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

        .cta-section h2 {
            font-size: 30px;
            font-weight: 800;
            margin: 0 0 12px;
        }

        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            margin: 0 0 30px;
        }

        .site-footer {
            background: var(--primary);
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 0 0;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand .logo {
            font-size: 19px;
            font-weight: 800;
            color: #fff;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }

        .footer-brand .logo i {
            color: var(--accent);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            max-width: 380px;
            margin: 0;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 16px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 0;
            flex-wrap: wrap;
        }

        .footer-bottom span {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
        }

        .footer-bottom-links a {
            color: rgba(255, 255, 255, 0.55);
        }

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

        .footer-bottom-links span {
            color: rgba(255, 255, 255, 0.35);
        }

        @media (max-width: 1024px) {
            .header-layout {
                padding: 12px 24px;
            }

            .main-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: var(--primary);
                padding: 14px 24px 24px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
            }

            .main-nav.open {
                display: block;
            }

            .main-nav ul {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
            }

            .main-nav>ul>li {
                width: 100%;
            }

            .main-nav>ul>li>a {
                width: 100%;
                padding: 12px 16px;
            }

            .dropdown {
                position: static;
                opacity: 1;
                visibility: visible;
                transform: none;
                box-shadow: none;
                background: rgba(255, 255, 255, 0.06);
                border: none;
                margin: 0 0 8px 16px;
                padding: 8px;
                display: none;
            }

            .main-nav>ul>li:hover .dropdown {
                display: block;
            }

            .dropdown a {
                color: rgba(255, 255, 255, 0.75);
            }

            .dropdown a i {
                color: var(--accent);
            }

            .menu-toggle {
                display: flex;
            }

            .page-hero {
                padding: 70px 0 60px;
            }

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

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

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

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

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

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

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

            .timeline-item,
            .timeline-item:nth-child(odd),
            .timeline-item:nth-child(even) {
                width: 100%;
                left: 0;
                padding: 0 0 30px 40px;
                text-align: left;
            }

            .timeline-item:nth-child(odd) .timeline-dot {
                right: auto;
                left: 4px;
            }

            .timeline-item:nth-child(even) .timeline-dot {
                left: 4px;
            }

            .timeline-item:nth-child(odd) .timeline-meta,
            .timeline-item:nth-child(even) .timeline-meta {
                justify-content: flex-start;
            }

            .timeline-item:nth-child(odd) .timeline-tags,
            .timeline-item:nth-child(even) .timeline-tags {
                justify-content: flex-start;
            }

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

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

        @media (max-width: 768px) {
            :root {
                --space-section: 60px;
            }

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

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

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

            .header-layout {
                gap: 12px;
            }

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

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

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

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

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

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

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

            .step-card {
                padding: 26px 24px;
            }

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

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

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

            .page-hero {
                padding: 55px 0 50px;
            }

            .page-hero h1 {
                font-size: 26px;
            }

            .hero-stats {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .hero-stat {
                padding: 14px 12px;
            }

            .hero-stat .num {
                font-size: 20px;
            }

            .hero-stat .label {
                font-size: 12px;
            }

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

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

            .stat-box {
                padding: 16px;
            }

            .stat-box .stat-num {
                font-size: 30px;
            }

            .timeline-item {
                padding-left: 36px;
            }

            .timeline-card {
                padding: 18px;
            }

            .timeline-meta {
                gap: 6px;
            }

            .timeline-ver {
                font-size: 15px;
            }

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

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

            .brand-logo {
                font-size: 14px;
            }
        }

/* roulang page: category3 */
:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-light: #eef2ff;
  --accent: #06b6d4;
  --accent-light: #22d3ee;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 40px rgba(15, 23, 42, 0.12);
  --transition: all 0.3s ease;
}

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

html, body { margin: 0; padding: 0; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
}

a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4, h5 { margin: 0; font-weight: 700; line-height: 1.25; }
p { margin: 0; }

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

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  box-shadow: 0 2px 16px rgba(15, 23, 42, 0.04);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; height: 76px; }

.logo {
  display: inline-flex;
  align-items: center;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--primary);
  white-space: nowrap;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.logo:hover { opacity: 0.85; transform: translateY(-1px); }
.logo::before {
  content: "\f51e";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  -webkit-text-fill-color: var(--primary);
  margin-right: 8px;
  font-size: 18px;
}

.main-nav { flex: 1; display: flex; justify-content: center; }
.main-nav > ul { display: flex; align-items: center; gap: 8px; }
.main-nav > ul > li { position: relative; }
.main-nav > ul > li > a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
}
.main-nav > ul > li > a:hover { color: var(--primary); background: var(--primary-light); }
.main-nav > ul > li > a.active { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35); }
.main-nav > ul > li > a i { font-size: 12px; }

.dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 200px;
  background: #fff;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  padding: 10px;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 50;
}
.main-nav > ul > li:hover .dropdown { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.dropdown a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text);
}
.dropdown a i { width: 18px; text-align: center; color: var(--primary); }
.dropdown a:hover { background: var(--primary-light); color: var(--primary); }

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-toggle:hover { border-color: var(--primary); color: var(--primary); }

/* ===== Page Banner ===== */
.page-banner {
  position: relative;
  padding: 100px 0 90px;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(30, 41, 59, 0.85)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  color: #fff;
  text-align: center;
}
.banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 13px;
  letter-spacing: 1px;
  color: #e0e7ff;
  margin-bottom: 20px;
}
.page-banner h1 { font-size: 44px; font-weight: 800; margin-bottom: 16px; letter-spacing: 1px; }
.page-banner h1 span { color: var(--accent-light); }
.page-banner p { max-width: 680px; margin: 0 auto 36px; font-size: 17px; color: #cbd5e1; }
.banner-meta { display: flex; justify-content: center; gap: 40px; flex-wrap: wrap; }
.banner-meta .meta-item { text-align: center; padding: 12px 20px; background: rgba(255,255,255,0.08); border-radius: var(--radius-sm); border: 1px solid rgba(255,255,255,0.1); }
.banner-meta .meta-num { display: block; font-size: 26px; font-weight: 800; color: var(--accent-light); }
.banner-meta .meta-txt { font-size: 13px; color: #94a3b8; }

/* ===== Section Common ===== */
.section { padding: 88px 0; }
.section-alt { background: #fff; }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 52px; }
.eyebrow {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 14px;
}
.section-head h2 { font-size: 34px; margin-bottom: 12px; }
.section-head p { color: var(--muted); font-size: 16px; }
.section-head.light h2 { color: #fff; }
.section-head.light p { color: rgba(255,255,255,0.7); }

/* ===== Category Tabs ===== */
.tabs-panel { padding-top: 0; margin-top: -40px; position: relative; z-index: 10; }
.tabs-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-lg); padding: 28px; border: 1px solid rgba(226,232,240,0.6); }
.tab-item { text-align: center; padding: 20px 12px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: #f8fafc; transition: var(--transition); }
.tab-item:hover { border-color: var(--primary); background: var(--primary-light); transform: translateY(-4px); }
.tab-item .tab-icon { width: 44px; height: 44px; margin: 0 auto 10px; display: flex; align-items: center; justify-content: center; border-radius: 12px; background: #fff; color: var(--primary); font-size: 18px; box-shadow: var(--shadow); }
.tab-item h3 { font-size: 16px; margin-bottom: 4px; }
.tab-item span { font-size: 13px; color: var(--muted); }

/* ===== Guide Cards ===== */
.guide-card {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid rgba(226, 232, 240, 0.7);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
}
.guide-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(79, 70, 229, 0.3); }
.guide-cover { position: relative; overflow: hidden; aspect-ratio: 16/10; }
.guide-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.guide-card:hover .guide-cover img { transform: scale(1.05); }
.guide-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  background: rgba(79, 70, 229, 0.9);
  backdrop-filter: blur(4px);
}
.guide-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.guide-body h3 { font-size: 18px; line-height: 1.5; margin-bottom: 10px; }
.guide-body h3 a:hover { color: var(--primary); }
.guide-body p { font-size: 14px; color: var(--muted); flex: 1; margin-bottom: 16px; }
.guide-meta { display: flex; align-items: center; gap: 16px; font-size: 13px; color: var(--muted); border-top: 1px solid #f1f5f9; padding-top: 14px; }
.guide-meta i { color: var(--primary); width: 14px; }

/* ===== Newbie Flow ===== */
.flow-section { position: relative; background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(30, 41, 59, 0.9)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat; color: #fff; }
.step-card { text-align: center; padding: 36px 24px; background: rgba(255, 255, 255, 0.06); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: var(--radius); transition: var(--transition); }
.step-card:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-4px); }
.step-num {
  display: inline-flex;
  width: 52px;
  height: 52px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 18px;
}
.step-card h3 { font-size: 18px; margin-bottom: 10px; }
.step-card p { font-size: 14px; color: rgba(255, 255, 255, 0.7); }

/* ===== Stats Band ===== */
.stats-band { background: #fff; border-bottom: 1px solid var(--border); }
.stat-card {
  text-align: center;
  padding: 36px 20px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--primary-light), #f0fdfa);
  border: 1px solid rgba(79, 70, 229, 0.1);
}
.stat-card .stat-num { font-size: 40px; font-weight: 800; background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.stat-card .stat-label { font-size: 14px; color: var(--muted); margin-top: 6px; }

/* ===== Rank List ===== */
.rank-list { counter-reset: rank; }
.rank-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 22px 24px;
  background: #fff;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin-bottom: 16px;
  transition: var(--transition);
}
.rank-item:hover { box-shadow: var(--shadow); border-color: rgba(79,70,229,0.25); transform: translateX(6px); }
.rank-no {
  position: relative;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 800;
  font-size: 18px;
}
.rank-item:nth-child(1) .rank-no, .rank-item:nth-child(2) .rank-no, .rank-item:nth-child(3) .rank-no { background: linear-gradient(135deg, var(--primary), var(--accent)); color: #fff; }
.rank-info { flex: 1; }
.rank-info h3 { font-size: 17px; margin-bottom: 4px; }
.rank-info p { font-size: 13px; color: var(--muted); }
.rank-info h3 a:hover { color: var(--primary); }
.rank-meta { text-align: right; flex-shrink: 0; }
.rank-meta .rank-badge { display: inline-block; padding: 4px 14px; border-radius: 999px; background: #f1f5f9; color: var(--muted); font-size: 12px; margin-bottom: 6px; }
.rank-meta .rank-score { font-size: 15px; font-weight: 700; color: var(--primary); }

/* ===== FAQ ===== */
.faq-wrap { max-width: 820px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-sm); margin-bottom: 14px; overflow: hidden; transition: var(--transition); }
.faq-item:hover { border-color: rgba(79,70,229,0.3); }
.faq-question { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 24px; cursor: pointer; font-size: 16px; font-weight: 600; }
.faq-question i { color: var(--primary); transition: transform 0.3s ease; flex-shrink: 0; }
.faq-item.open .faq-question i { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; padding: 0 24px; transition: max-height 0.4s ease, padding 0.3s ease; color: var(--muted); font-size: 14px; }
.faq-item.open .faq-answer { max-height: 300px; padding-bottom: 20px; }

/* ===== CTA ===== */
.cta-section { padding: 80px 0; }
.cta-box {
  position: relative;
  text-align: center;
  padding: 64px 48px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.95), rgba(6, 182, 212, 0.9)), url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
  color: #fff;
  box-shadow: 0 20px 60px rgba(79, 70, 229, 0.3);
}
.cta-box h2 { font-size: 34px; margin-bottom: 14px; }
.cta-box p { max-width: 560px; margin: 0 auto 32px; font-size: 16px; color: rgba(255, 255, 255, 0.9); }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  background: #fff;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  transition: var(--transition);
}
.btn:hover { transform: translateY(-2px) scale(1.03); box-shadow: 0 14px 30px rgba(0, 0, 0, 0.2); color: var(--primary-dark); }

/* ===== Footer ===== */
.site-footer { background: var(--dark); color: #94a3b8; padding: 64px 0 28px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 48px; margin-bottom: 44px; }
.footer-brand .logo { color: #fff; }
.footer-brand .logo::before { -webkit-text-fill-color: #fff; }
.footer-brand p { margin-top: 16px; font-size: 14px; line-height: 1.8; max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; }
.footer-col ul li a:hover { color: var(--accent-light); padding-left: 4px; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid rgba(255, 255, 255, 0.1); padding-top: 28px; font-size: 13px; }
.footer-bottom-links { display: flex; align-items: center; gap: 12px; }
.footer-bottom-links a:hover { color: #fff; }
.footer-bottom-links span { color: var(--accent-light); }

/* ===== Responsive ===== */
@media screen and (max-width: 1024px) {
  .header-inner { gap: 16px; }
  .main-nav > ul > li > a { padding: 10px 12px; font-size: 14px; }
  .logo { font-size: 17px; }
  .page-banner { padding: 80px 0 70px; }
  .tabs-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media screen and (max-width: 768px) {
  .header-inner { height: 64px; }
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    padding: 16px;
    display: none;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    justify-content: flex-start;
  }
  .main-nav.open { display: block; }
  .main-nav > ul { flex-direction: column; align-items: stretch; gap: 4px; }
  .main-nav > ul > li > a { width: 100%; justify-content: space-between; }
  .dropdown {
    position: static;
    transform: none;
    min-width: 0;
    width: 100%;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    border: none;
    background: #f8fafc;
    margin-top: 4px;
    display: none;
  }
  .main-nav > ul > li:hover .dropdown { display: block; transform: none; }
  .page-banner h1 { font-size: 30px; }
  .page-banner { padding: 60px 0 50px; }
  .section { padding: 64px 0; }
  .section-head h2 { font-size: 26px; }
  .tabs-grid { grid-template-columns: 1fr; margin-top: -24px; padding: 20px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .cta-box { padding: 48px 24px; }
  .cta-box h2 { font-size: 26px; }
  .stat-card .stat-num { font-size: 30px; }
  .rank-item { flex-wrap: wrap; gap: 12px; }
  .rank-meta { text-align: left; }
  .banner-meta { gap: 16px; }
}

@media screen and (max-width: 520px) {
  .container { padding: 0 16px; }
  .logo { font-size: 15px; }
  .logo::before { font-size: 15px; }
  .page-banner h1 { font-size: 25px; }
  .banner-meta .meta-item { padding: 10px 14px; }
  .banner-meta .meta-num { font-size: 20px; }
}