/* roulang page: index */
:root{
  --primary:#0f1e3d;
  --primary-light:#1e3a5f;
  --primary-dark:#0a1428;
  --accent:#d4a853;
  --accent-hover:#c1973f;
  --bg:#f7f6f3;
  --bg-white:#ffffff;
  --bg-dark:#0f1e3d;
  --text:#1a1a2e;
  --text-muted:#6b7280;
  --border:#e5e7eb;
  --radius-sm:8px;
  --radius-md:16px;
  --radius-lg:24px;
  --shadow-sm:0 1px 3px rgba(0,0,0,.08);
  --shadow-md:0 6px 24px rgba(0,0,0,.08);
  --shadow-lg:0 16px 48px rgba(0,0,0,.12);
  --space-section:80px;
  --space-section-sm:48px;
  --container:1200px;
  --transition:.3s cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.7;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit;transition:color var(--transition)}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul,ol{list-style:none}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;width:100%}
.section{padding:var(--space-section) 0}
.section-sm{padding:var(--space-section-sm) 0}
.section-header{max-width:720px;margin:0 auto 48px;text-align:center}
.section-tag{display:inline-block;background:rgba(212,168,83,.12);color:var(--accent-hover);font-size:.85rem;font-weight:600;padding:6px 18px;border-radius:100px;margin-bottom:16px;letter-spacing:.5px}
.section-title{font-size:2.1rem;font-weight:700;line-height:1.3;margin-bottom:12px;color:var(--text)}
.section-subtitle{color:var(--text-muted);font-size:1.05rem;line-height:1.7}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 32px;border-radius:100px;font-size:1rem;font-weight:600;transition:all var(--transition);border:2px solid transparent}
.btn-primary{background:var(--accent);color:var(--primary-dark);box-shadow:0 4px 16px rgba(212,168,83,.35)}
.btn-primary:hover{background:var(--accent-hover);transform:translateY(-2px);box-shadow:0 8px 28px rgba(212,168,83,.45)}
.btn-outline{border-color:rgba(255,255,255,.7);color:#fff;background:transparent}
.btn-outline:hover{background:rgba(255,255,255,.15);border-color:#fff;transform:translateY(-2px)}
.btn-dark{background:var(--primary);color:#fff}
.btn-dark:hover{background:var(--primary-light);transform:translateY(-2px)}
.badge{display:inline-block;padding:5px 14px;border-radius:100px;font-size:.78rem;font-weight:600;background:rgba(15,30,61,.08);color:var(--primary);margin-right:8px}
.badge-accent{background:rgba(212,168,83,.15);color:var(--accent-hover)}

/* ===== Header / 胶囊导航 ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;padding:16px 0;transition:all var(--transition)}
.site-header.scrolled{background:rgba(255,255,255,.92);backdrop-filter:blur(12px);box-shadow:var(--shadow-sm)}
.nav-container{display:flex;align-items:center;justify-content:space-between;gap:24px;max-width:1200px;margin:0 auto;padding:12px 24px;background:rgba(15,30,61,.88);border-radius:100px;box-shadow:0 8px 32px rgba(0,0,0,.18);backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,.1)}
.brand{font-size:1.25rem;font-weight:700;color:#fff;letter-spacing:.5px;display:flex;align-items:center;gap:8px;line-height:1.2}
.brand-dot{width:8px;height:8px;background:var(--accent);border-radius:50%;display:inline-block}
.main-nav{display:flex;align-items:center;gap:4px}
.nav-link{padding:8px 20px;border-radius:100px;color:rgba(255,255,255,.85);font-size:.95rem;font-weight:500;transition:all var(--transition)}
.nav-link:hover{background:rgba(255,255,255,.12);color:#fff}
.nav-link.active{background:var(--accent);color:var(--primary-dark);font-weight:600}
.nav-cta{display:inline-flex;align-items:center;gap:6px;padding:8px 22px;border-radius:100px;background:var(--accent);color:var(--primary-dark);font-size:.9rem;font-weight:600;transition:all var(--transition);border:2px solid transparent}
.nav-cta:hover{background:var(--accent-hover);transform:translateY(-1px)}
.nav-toggle{display:none;flex-direction:column;gap:5px;padding:8px;border-radius:8px;background:rgba(255,255,255,.1)}
.nav-toggle span{width:22px;height:2px;background:#fff;border-radius:2px;transition:all var(--transition)}

/* ===== Hero ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;background-repeat:no-repeat;padding:140px 0 100px;text-align:center}
.hero::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(15,30,61,.88) 0%,rgba(15,30,61,.68) 100%)}
.hero-content{position:relative;z-index:2;max-width:800px;margin:0 auto;padding:0 24px}
.hero-tag{display:inline-flex;align-items:center;gap:8px;background:rgba(212,168,83,.18);border:1px solid rgba(212,168,83,.4);color:var(--accent);padding:8px 24px;border-radius:100px;font-size:.9rem;font-weight:600;margin-bottom:32px}
.hero-tag::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--accent)}
.hero-title{font-size:3.2rem;font-weight:800;color:#fff;line-height:1.2;margin-bottom:16px;letter-spacing:-1px}
.hero-title span{color:var(--accent)}
.hero-subtitle{font-size:1.35rem;color:rgba(255,255,255,.9);font-weight:500;margin-bottom:12px}
.hero-text{font-size:1.05rem;color:rgba(255,255,255,.75);max-width:600px;margin:0 auto 40px;line-height:1.8}
.hero-buttons{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.hero-stats{display:flex;justify-content:center;gap:48px;margin-top:56px;flex-wrap:wrap}
.hero-stat{text-align:center}
.hero-stat-num{font-size:2rem;font-weight:700;color:#fff}
.hero-stat-label{font-size:.9rem;color:rgba(255,255,255,.65);margin-top:4px}

/* ===== 特色板块 ===== */
.features-section{padding:var(--space-section) 0;}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:8px}
.feature-card{background:var(--bg-white);border-radius:var(--radius-md);padding:36px 28px;box-shadow:var(--shadow-sm);border:1px solid var(--border);transition:all var(--transition);position:relative;overflow:hidden}
.feature-card::after{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform var(--transition)}
.feature-card:hover::after{transform:scaleX(1)}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}
.feature-icon{width:56px;height:56px;border-radius:16px;background:rgba(15,30,61,.06);display:flex;align-items:center;justify-content:center;margin-bottom:20px;font-size:1.4rem}
.feature-title{font-size:1.2rem;font-weight:600;margin-bottom:8px;color:var(--text)}
.feature-text{color:var(--text-muted);font-size:.95rem;line-height:1.7}

/* ===== 分类入口 ===== */
.category-section{padding:var(--space-section) 0;background:var(--bg-white)}
.category-card{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;background:var(--bg-white);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);border:1px solid var(--border)}
.category-image{position:relative;height:100%;min-height:360px}
.category-image img{width:100%;height:100%;object-fit:cover}
.category-image::after{content:'';position:absolute;inset:0;background:linear-gradient(to top,rgba(15,30,61,.2),transparent 50%)}
.category-info{padding:48px 40px}
.category-tag{display:inline-block;background:rgba(212,168,83,.15);color:var(--accent-hover);padding:6px 18px;border-radius:100px;font-size:.85rem;font-weight:600;margin-bottom:16px}
.category-title{font-size:1.9rem;font-weight:700;margin-bottom:16px;color:var(--text)}
.category-desc{color:var(--text-muted);font-size:1.05rem;line-height:1.8;margin-bottom:24px}
.category-list{display:flex;flex-direction:column;gap:12px;margin-bottom:28px}
.category-list li{display:flex;align-items:center;gap:10px;font-size:.95rem;color:var(--text)}
.category-list li::before{content:'✓';display:inline-flex;width:20px;height:20px;border-radius:50%;background:rgba(212,168,83,.2);color:var(--accent-hover);align-items:center;justify-content:center;font-size:.75rem;font-weight:700}

/* ===== 最新资讯 ===== */
.latest-section{padding:var(--space-section) 0;background:var(--bg)}
.latest-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{background:var(--bg-white);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--border);transition:all var(--transition);display:flex;flex-direction:column}
.post-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}
.post-image{position:relative;height:200px;overflow:hidden}
.post-image img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.post-card:hover .post-image img{transform:scale(1.05)}
.post-content{padding:24px;flex:1;display:flex;flex-direction:column}
.post-meta{display:flex;align-items:center;gap:12px;margin-bottom:12px;font-size:.82rem;color:var(--text-muted)}
.post-meta .category{background:rgba(15,30,61,.06);color:var(--primary);padding:4px 12px;border-radius:100px;font-weight:500}
.post-title{font-size:1.1rem;font-weight:600;line-height:1.5;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-title a{color:var(--text);transition:color var(--transition)}
.post-title a:hover{color:var(--accent-hover)}
.post-excerpt{color:var(--text-muted);font-size:.9rem;line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:16px;flex:1}

/* ===== 数据统计 ===== */
.stats-section{padding:var(--space-section) 0;background:var(--bg-dark);position:relative;overflow:hidden}
.stats-section::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(to right,transparent,rgba(212,168,83,.5),transparent)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;text-align:center}
.stat-item{padding:32px 16px}
.stat-number{font-size:2.8rem;font-weight:800;color:var(--accent);line-height:1.2;margin-bottom:8px}
.stat-label{color:rgba(255,255,255,.7);font-size:.95rem}

/* ===== FAQ ===== */
.faq-section{padding:var(--space-section) 0;background:var(--bg-white)}
.faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:16px}
.faq-item{border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;transition:all var(--transition)}
.faq-item:hover{border-color:rgba(212,168,83,.4)}
.faq-question{display:flex;justify-content:space-between;align-items:center;padding:24px 28px;cursor:pointer;font-size:1.05rem;font-weight:600;color:var(--text);transition:background var(--transition)}
.faq-question:hover{background:rgba(15,30,61,.02)}
.faq-question .icon{width:28px;height:28px;border-radius:50%;background:rgba(212,168,83,.15);color:var(--accent-hover);display:flex;align-items:center;justify-content:center;font-size:1rem;transition:transform var(--transition);flex-shrink:0}
.faq-item.open .faq-question .icon{transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease}
.faq-answer-inner{padding:0 28px 24px;color:var(--text-muted);font-size:.95rem;line-height:1.8}
.faq-item.open .faq-answer{max-height:300px}

/* ===== CTA ===== */
.cta-section{padding:var(--space-section) 0;background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;top:0;left:0;right:0;bottom:0;background-image:url('/assets/images/backpic/back-2.png');background-size:cover;background-position:center;opacity:.1}
.cta-content{position:relative;z-index:1;text-align:center;max-width:700px;margin:0 auto;padding:48px 24px}
.cta-title{font-size:2.2rem;color:#fff;font-weight:700;margin-bottom:16px}
.cta-text{color:rgba(255,255,255,.8);font-size:1.05rem;margin-bottom:32px}
.cta-buttons{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}

/* ===== Footer ===== */
.site-footer{background:var(--primary-dark);color:rgba(255,255,255,.7);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.08)}
.footer-brand .brand{color:#fff;margin-bottom:16px}
.footer-brand p{color:rgba(255,255,255,.6);font-size:.9rem;line-height:1.7;max-width:280px}
.footer-col h4{color:#fff;font-size:1rem;font-weight:600;margin-bottom:20px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{color:rgba(255,255,255,.6);font-size:.9rem;transition:all var(--transition)}
.footer-col a:hover{color:var(--accent);padding-left:4px}
.footer-bottom{padding:24px 0;text-align:center;font-size:.85rem;color:rgba(255,255,255,.4)}
.footer-bottom a{color:rgba(255,255,255,.5)}
.footer-bottom a:hover{color:var(--accent)}

/* ===== 移动端 ===== */
@media(max-width:1024px){
  .hero-title{font-size:2.6rem}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .latest-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  :root{--space-section:60px}
  .nav-container{padding:10px 16px;border-radius:16px;flex-wrap:wrap}
  .main-nav{display:none;width:100%;flex-direction:column;padding:12px 0;gap:4px}
  .main-nav.open{display:flex}
  .nav-toggle{display:flex}
  .nav-cta{display:none}
  .hero{min-height:auto;padding:120px 0 80px}
  .hero-title{font-size:2.1rem}
  .hero-subtitle{font-size:1.1rem}
  .hero-stats{gap:24px;margin-top:40px}
  .category-card{grid-template-columns:1fr}
  .category-image{min-height:220px}
  .category-info{padding:32px 24px}
  .latest-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .stat-number{font-size:2rem}
  .section-title{font-size:1.7rem}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .nav-link{padding:12px 20px;text-align:center}
}
@media(max-width:520px){
  .hero-title{font-size:1.7rem}
  .hero-text{font-size:.95rem}
  .hero-buttons{flex-direction:column;align-items:center}
  .hero-buttons .btn{width:100%}
  .features-grid{grid-template-columns:1fr}
  .latest-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr}
  .section-title{font-size:1.4rem}
  .category-title{font-size:1.4rem}
  .category-info{padding:24px 20px}
  .cta-title{font-size:1.6rem}
  .cta-buttons{flex-direction:column;align-items:center}
  .cta-buttons .btn{width:100%}
}

/* roulang page: category1 */
:root {
      --primary: #1a56db;
      --primary-dark: #1e40af;
      --primary-light: #dbeafe;
      --accent: #d4a017;
      --accent-light: #fef3c7;
      --bg: #f8fafc;
      --bg-dark: #0f172a;
      --surface: #ffffff;
      --text: #1e293b;
      --text-muted: #64748b;
      --border: #e2e8f0;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
      --shadow: 0 8px 30px rgba(15, 23, 42, 0.09);
      --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.14);
      --radius-sm: 8px;
      --radius: 16px;
      --radius-lg: 24px;
      --section-pad: 96px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      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;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: var(--primary);
      text-decoration: none;
      transition: var(--transition);
    }
    a:hover {
      color: var(--primary-dark);
    }
    img {
      max-width: 100%;
      display: block;
    }
    ul, ol {
      list-style: none;
    }
    button, input {
      font-family: inherit;
      border: none;
      outline: none;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ========== 悬浮胶囊导航 ========== */
    .site-header {
      position: sticky;
      top: 16px;
      z-index: 1000;
      padding: 0 20px;
      pointer-events: none;
    }
    .site-header .nav-container {
      pointer-events: auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      max-width: 1200px;
      margin: 0 auto;
      padding: 12px 24px;
      background: rgba(255, 255, 255, 0.86);
      backdrop-filter: blur(18px) saturate(1.6);
      -webkit-backdrop-filter: blur(18px) saturate(1.6);
      border: 1px solid rgba(255, 255, 255, 0.7);
      box-shadow: 0 8px 32px rgba(15, 23, 42, 0.12), 0 0 0 1px rgba(148, 163, 184, 0.06);
      border-radius: 999px;
      transition: box-shadow 0.3s ease, background 0.3s ease;
    }
    .site-header .nav-container:hover {
      box-shadow: 0 12px 40px rgba(15, 23, 42, 0.16), 0 0 0 1px rgba(148, 163, 184, 0.1);
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.28rem;
      font-weight: 800;
      color: var(--text);
      white-space: nowrap;
      letter-spacing: -0.02em;
    }
    .brand:hover {
      color: var(--primary);
    }
    .brand-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      box-shadow: 0 0 0 4px rgba(26, 86, 219, 0.15);
      flex-shrink: 0;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 4px;
      background: rgba(241, 245, 249, 0.7);
      border-radius: 999px;
      padding: 4px;
    }
    .nav-link {
      padding: 8px 20px;
      border-radius: 999px;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-muted);
      white-space: nowrap;
      transition: var(--transition);
      position: relative;
    }
    .nav-link:hover {
      color: var(--primary);
      background: rgba(255, 255, 255, 0.8);
    }
    .nav-link.active {
      color: #fff;
      background: var(--primary);
      box-shadow: 0 4px 14px rgba(26, 86, 219, 0.35);
    }
    .nav-cta {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 9px 22px;
      background: var(--primary);
      color: #fff;
      border-radius: 999px;
      font-size: 0.9rem;
      font-weight: 700;
      white-space: nowrap;
      box-shadow: 0 4px 16px rgba(26, 86, 219, 0.28);
      transition: var(--transition);
    }
    .nav-cta:hover {
      background: var(--primary-dark);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(26, 86, 219, 0.36);
    }
    .nav-toggle {
      display: none;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 5px;
      width: 44px;
      height: 44px;
      background: rgba(241, 245, 249, 0.9);
      border-radius: 12px;
      cursor: pointer;
    }
    .nav-toggle span {
      display: block;
      width: 18px;
      height: 2px;
      background: var(--text);
      border-radius: 2px;
      transition: var(--transition);
    }

    /* ========== 通用板块 ========== */
    .section {
      padding: var(--section-pad) 0;
    }
    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 60px;
    }
    .section-head .eyebrow {
      display: inline-block;
      padding: 5px 16px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 999px;
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 0.04em;
      margin-bottom: 16px;
    }
    .section-head h2 {
      font-size: clamp(1.8rem, 3.2vw, 2.4rem);
      font-weight: 800;
      line-height: 1.3;
      letter-spacing: -0.02em;
      margin-bottom: 14px;
      color: var(--text);
    }
    .section-head p {
      color: var(--text-muted);
      font-size: 1.05rem;
    }

    /* ========== Banner ========== */
    .page-banner {
      position: relative;
      padding: 120px 0 80px;
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(30, 64, 175, 0.78)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
      color: #fff;
      text-align: center;
    }
    .page-banner::before {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 60px;
      background: linear-gradient(to top, var(--bg), transparent);
    }
    .page-banner .container {
      position: relative;
      max-width: 900px;
    }
    .banner-tag {
      display: inline-block;
      padding: 6px 18px;
      background: rgba(255, 255, 255, 0.15);
      border: 1px solid rgba(255, 255, 255, 0.3);
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 600;
      letter-spacing: 0.08em;
      margin-bottom: 24px;
      backdrop-filter: blur(8px);
    }
    .page-banner h1 {
      font-size: clamp(2rem, 4.5vw, 3.2rem);
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: -0.02em;
      margin-bottom: 18px;
      text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    }
    .page-banner p {
      font-size: 1.1rem;
      opacity: 0.9;
      max-width: 700px;
      margin: 0 auto;
      line-height: 1.8;
    }
    .breadcrumb {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 8px;
      margin-top: 22px;
      font-size: 0.88rem;
      opacity: 0.8;
    }
    .breadcrumb a {
      color: rgba(255, 255, 255, 0.85);
    }
    .breadcrumb a:hover {
      color: #fff;
    }
    .breadcrumb i {
      font-size: 0.7rem;
      opacity: 0.6;
    }

    /* ========== 分类指南卡片 ========== */
    .guide-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin-top: -36px;
      position: relative;
      z-index: 2;
    }
    .guide-card {
      background: var(--surface);
      border-radius: var(--radius);
      padding: 36px 32px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .guide-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--accent));
      opacity: 0;
      transition: var(--transition);
    }
    .guide-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: transparent;
    }
    .guide-card:hover::before {
      opacity: 1;
    }
    .guide-icon {
      width: 58px;
      height: 58px;
      border-radius: 16px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 20px;
    }
    .guide-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .guide-card p {
      color: var(--text-muted);
      font-size: 0.93rem;
    }

    /* ========== 内容列表 ========== */
    .content-section {
      background: var(--surface);
    }
    .content-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .content-card {
      display: flex;
      flex-direction: column;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      background: var(--surface);
      transition: var(--transition);
    }
    .content-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow);
    }
    .content-thumb {
      position: relative;
      overflow: hidden;
      aspect-ratio: 16 / 9;
    }
    .content-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .content-card:hover .content-thumb img {
      transform: scale(1.05);
    }
    .content-thumb::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 50%;
      background: linear-gradient(to top, rgba(15, 23, 42, 0.3), transparent);
    }
    .content-tag {
      position: absolute;
      top: 16px;
      left: 16px;
      z-index: 2;
      display: inline-block;
      padding: 4px 14px;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(8px);
      color: var(--primary);
      font-size: 0.78rem;
      font-weight: 700;
      border-radius: 999px;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }
    .content-body {
      padding: 26px 26px 28px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .content-body h3 {
      font-size: 1.15rem;
      font-weight: 700;
      line-height: 1.5;
      margin-bottom: 10px;
      color: var(--text);
    }
    .content-body p {
      color: var(--text-muted);
      font-size: 0.94rem;
      line-height: 1.7;
      flex: 1;
      margin-bottom: 18px;
    }
    .content-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.84rem;
      color: var(--text-muted);
      border-top: 1px solid var(--border);
      padding-top: 16px;
    }
    .content-meta i {
      font-size: 0.78rem;
    }

    /* ========== 图片 + 文字区块 ========== */
    .split-section {
      background: linear-gradient(180deg, var(--bg), #fff);
    }
    .split-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .split-media {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }
    .split-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      aspect-ratio: 4 / 3;
    }
    .split-media::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(26, 86, 219, 0.18), rgba(212, 160, 23, 0.12));
      pointer-events: none;
    }
    .split-badge {
      position: absolute;
      bottom: 18px;
      left: 18px;
      z-index: 2;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(10px);
      padding: 10px 18px;
      border-radius: 12px;
      font-size: 0.82rem;
      font-weight: 700;
      color: var(--primary);
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(255, 255, 255, 0.6);
    }
    .split-text .eyebrow {
      display: inline-block;
      padding: 5px 14px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 999px;
      font-size: 0.8rem;
      font-weight: 700;
      margin-bottom: 16px;
      letter-spacing: 0.04em;
    }
    .split-text h2 {
      font-size: clamp(1.7rem, 3vw, 2.2rem);
      font-weight: 800;
      line-height: 1.35;
      margin-bottom: 18px;
      letter-spacing: -0.01em;
    }
    .split-text p {
      color: var(--text-muted);
      margin-bottom: 22px;
      font-size: 1rem;
      line-height: 1.8;
    }
    .feature-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-top: 24px;
    }
    .feature-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text);
      padding: 10px 14px;
      background: var(--bg);
      border-radius: 12px;
      border: 1px solid var(--border);
    }
    .feature-list i {
      color: var(--primary);
      font-size: 0.85rem;
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    /* ========== 步骤流程 ========== */
    .steps-section {
      background: var(--bg-dark);
      color: #fff;
      position: relative;
      overflow: hidden;
    }
    .steps-section::before {
      content: '';
      position: absolute;
      top: -80px;
      right: -80px;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(26, 86, 219, 0.3), transparent 70%);
      pointer-events: none;
    }
    .steps-section .section-head h2 {
      color: #fff;
    }
    .steps-section .section-head p {
      color: rgba(255, 255, 255, 0.7);
    }
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
      position: relative;
    }
    .step-item {
      position: relative;
      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);
      backdrop-filter: blur(10px);
      transition: var(--transition);
    }
    .step-item:hover {
      background: rgba(255, 255, 255, 0.1);
      transform: translateY(-5px);
      border-color: rgba(255, 255, 255, 0.2);
    }
    .step-num {
      width: 48px;
      height: 48px;
      margin: 0 auto 18px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.2rem;
      box-shadow: 0 6px 20px rgba(26, 86, 219, 0.4);
    }
    .step-item h3 {
      font-size: 1.08rem;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .step-item p {
      color: rgba(255, 255, 255, 0.6);
      font-size: 0.88rem;
      line-height: 1.6;
    }

    /* ========== 数据统计条 ========== */
    .stats-band {
      padding: 48px 0;
      background: var(--surface);
      border-bottom: 1px solid var(--border);
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
      text-align: center;
    }
    .stat-item .number {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.2;
      letter-spacing: -0.02em;
    }
    .stat-item .label {
      color: var(--text-muted);
      font-size: 0.92rem;
      margin-top: 6px;
      font-weight: 500;
    }

    /* ========== FAQ ========== */
    .faq-section {
      background: var(--surface);
    }
    .faq-list {
      max-width: 840px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .faq-item {
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      background: var(--surface);
      transition: var(--transition);
    }
    .faq-item:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .faq-item details {
      padding: 0;
    }
    .faq-item summary {
      padding: 22px 26px;
      font-size: 1.02rem;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      list-style: none;
      transition: var(--transition);
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-item summary::after {
      content: '\f078';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      width: 28px;
      height: 28px;
      background: var(--bg);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.7rem;
      color: var(--primary);
      flex-shrink: 0;
      transition: var(--transition);
    }
    .faq-item details[open] summary {
      color: var(--primary);
    }
    .faq-item details[open] summary::after {
      transform: rotate(180deg);
      background: var(--primary);
      color: #fff;
    }
    .faq-answer {
      padding: 0 26px 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.8;
    }

    /* ========== CTA ========== */
    .cta-section {
      background: linear-gradient(135deg, rgba(30, 64, 175, 0.95), rgba(15, 23, 42, 0.97)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
      padding: 88px 0;
      text-align: center;
      color: #fff;
      position: relative;
    }
    .cta-section h2 {
      font-size: clamp(1.8rem, 3.5vw, 2.5rem);
      font-weight: 900;
      margin-bottom: 16px;
      letter-spacing: -0.01em;
    }
    .cta-section p {
      color: rgba(255, 255, 255, 0.8);
      font-size: 1.05rem;
      max-width: 620px;
      margin: 0 auto 36px;
    }
    .cta-buttons {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 14px 32px;
      border-radius: 999px;
      font-size: 0.96rem;
      font-weight: 700;
      transition: var(--transition);
      cursor: pointer;
      border: none;
    }
    .btn-primary {
      background: #fff;
      color: var(--primary);
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
    }
    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
      color: var(--primary-dark);
    }
    .btn-outline-light {
      background: transparent;
      color: #fff;
      border: 2px solid rgba(255, 255, 255, 0.5);
    }
    .btn-outline-light:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: #fff;
      transform: translateY(-3px);
    }

    /* ========== 页脚 ========== */
    .site-footer {
      background: var(--bg-dark);
      color: rgba(255, 255, 255, 0.7);
      padding: 72px 0 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      gap: 48px;
      padding-bottom: 48px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-brand .brand {
      color: #fff;
      margin-bottom: 14px;
    }
    .footer-brand p {
      font-size: 0.92rem;
      line-height: 1.7;
      max-width: 300px;
    }
    .footer-col h4 {
      color: #fff;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 18px;
      position: relative;
      padding-bottom: 10px;
    }
    .footer-col h4::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 30px;
      height: 2px;
      background: var(--accent);
      border-radius: 2px;
    }
    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .footer-col a {
      color: rgba(255, 255, 255, 0.65);
      font-size: 0.92rem;
      transition: var(--transition);
    }
    .footer-col a:hover {
      color: #fff;
      padding-left: 4px;
    }
    .footer-bottom {
      padding: 26px 0;
      text-align: center;
      font-size: 0.85rem;
      color: rgba(255, 255, 255, 0.4);
    }

    /* ========== 响应式 ========== */
    @media (max-width: 1024px) {
      :root {
        --section-pad: 72px;
      }
      .guides-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      :root {
        --section-pad: 60px;
      }
      .site-header {
        top: 10px;
        padding: 0 12px;
      }
      .site-header .nav-container {
        padding: 10px 16px;
        border-radius: 24px;
      }
      .main-nav {
        display: none;
        position: absolute;
        top: calc(100% + 10px);
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.97);
        backdrop-filter: blur(20px);
        border-radius: 20px;
        padding: 16px;
        box-shadow: 0 20px 40px rgba(15, 23, 42, 0.15);
        border: 1px solid var(--border);
      }
      .main-nav.open {
        display: flex;
      }
      .nav-link {
        width: 100%;
        text-align: center;
        padding: 12px 20px;
      }
      .nav-cta {
        display: none;
      }
      .nav-toggle {
        display: flex;
      }
      .guide-grid {
        grid-template-columns: 1fr;
        gap: 18px;
        margin-top: 20px;
      }
      .content-grid {
        grid-template-columns: 1fr;
      }
      .split-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .steps-grid {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .feature-list {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 520px) {
      .site-header .nav-container {
        padding: 8px 12px;
      }
      .brand {
        font-size: 1.05rem;
      }
      .brand-dot {
        width: 8px;
        height: 8px;
      }
      .page-banner {
        padding: 100px 0 60px;
      }
      .page-banner h1 {
        font-size: 1.7rem;
      }
      .page-banner p {
        font-size: 0.96rem;
      }
      .section-head h2 {
        font-size: 1.55rem;
      }
      .content-card .content-body h3 {
        font-size: 1.05rem;
      }
      .footer-brand .brand {
        font-size: 1.1rem;
      }
    }

/* roulang page: article */
:root {
    --primary: #165dff;
    --primary-dark: #0a44cc;
    --primary-light: #e8efff;
    --accent: #f5b40a;
    --accent-dark: #d99a00;
    --bg: #f6f8fc;
    --surface: #ffffff;
    --text: #1d2733;
    --text-weak: #6b7686;
    --border: #e3e9f2;
    --radius: 18px;
    --radius-sm: 12px;
    --radius-pill: 999px;
    --shadow: 0 10px 30px rgba(21, 42, 90, 0.08);
    --shadow-lg: 0 18px 44px rgba(21, 42, 90, 0.12);
    --transition: all 0.25s ease;
    --container: 1200px;
}

*,
*::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: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

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

img {
    max-width: 100%;
    display: block;
    border: 0;
}

ul,
ol {
    list-style: none;
}

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

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

.site-header {
    position: fixed;
    top: 16px;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 0 24px;
}

.nav-container {
    max-width: var(--container);
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 20px;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(22, 93, 255, 0.12);
    border-radius: var(--radius-pill);
    padding: 10px 22px;
    box-shadow: 0 8px 30px rgba(15, 45, 90, 0.08);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 18px;
    color: var(--text);
    white-space: nowrap;
}

.brand-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    flex-shrink: 0;
    box-shadow: 0 0 0 4px rgba(22, 93, 255, 0.12);
}

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

.nav-link {
    display: inline-flex;
    align-items: center;
    padding: 8px 18px;
    border-radius: var(--radius-pill);
    font-weight: 600;
    font-size: 14px;
    color: var(--text-weak);
    white-space: nowrap;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.nav-link.active {
    color: var(--primary);
    background: var(--primary-light);
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    padding: 9px 20px;
    border-radius: var(--radius-pill);
    white-space: nowrap;
    transition: var(--transition);
    box-shadow: 0 8px 18px rgba(22, 93, 255, 0.28);
}

.nav-cta:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(22, 93, 255, 0.34);
    color: #fff;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    border-radius: 10px;
    cursor: pointer;
    background: var(--primary-light);
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    border-radius: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.article-hero {
    position: relative;
    padding: 180px 0 110px;
    background: linear-gradient(125deg, #0e2138 0%, #16395e 55%, #0d2b47 100%);
    overflow: hidden;
}

.article-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    opacity: 0.2;
    z-index: 0;
}

.article-hero::after {
    content: "";
    position: absolute;
    left: -80px;
    bottom: -100px;
    width: 480px;
    height: 480px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(22, 93, 255, 0.35), transparent 65%);
    z-index: 0;
}

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

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 18px;
}

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

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

.breadcrumb span {
    color: rgba(255, 255, 255, 0.4);
}

.badge {
    display: inline-flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.16);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.28);
    padding: 4px 14px;
    border-radius: var(--radius-pill);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.5px;
    backdrop-filter: blur(6px);
}

.badge-accent {
    background: var(--accent);
    color: #1b2430;
    border-color: var(--accent);
}

.article-hero h1 {
    color: #fff;
    font-size: clamp(30px, 4vw, 44px);
    line-height: 1.35;
    font-weight: 800;
    margin: 18px 0 14px;
    max-width: 860px;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    color: rgba(255, 255, 255, 0.75);
    font-size: 14px;
}

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

.article-section {
    position: relative;
    padding: 0 0 80px;
}

.article-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 40px;
    margin-top: -56px;
    align-items: start;
}

.article-main {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 44px;
    border: 1px solid var(--border);
    position: relative;
    z-index: 5;
}

.article-figure {
    margin: 0 0 32px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.article-figure img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.article-body {
    font-size: 16px;
    color: #2c3746;
    line-height: 2;
}

.article-body h2 {
    font-size: 24px;
    font-weight: 800;
    color: var(--text);
    margin: 36px 0 16px;
    padding-left: 16px;
    border-left: 4px solid var(--primary);
    border-radius: 2px;
}

.article-body h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    margin: 28px 0 12px;
}

.article-body p {
    margin-bottom: 20px;
}

.article-body img {
    border-radius: var(--radius-sm);
    margin: 24px 0;
    box-shadow: var(--shadow);
}

.article-body blockquote {
    background: var(--primary-light);
    border-left: 4px solid var(--primary);
    padding: 18px 24px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: #35507a;
    margin: 24px 0;
    font-style: normal;
}

.article-body ul,
.article-body ol {
    margin: 18px 0 22px;
    padding-left: 24px;
}

.article-body ul li {
    position: relative;
    padding-left: 18px;
    margin-bottom: 10px;
}

.article-body ul li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 14px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
}

.article-body ol {
    list-style: decimal;
}

.article-body a {
    color: var(--primary);
    font-weight: 600;
    border-bottom: 1px solid rgba(22, 93, 255, 0.3);
}

.article-body a:hover {
    border-bottom-color: var(--primary);
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 36px;
    padding-top: 26px;
    border-top: 1px solid var(--border);
}

.tag {
    display: inline-flex;
    align-items: center;
    background: var(--bg);
    border: 1px solid var(--border);
    color: var(--text-weak);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: var(--radius-pill);
    transition: var(--transition);
}

.tag:hover {
    background: var(--primary-light);
    border-color: rgba(22, 93, 255, 0.25);
    color: var(--primary);
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: relative;
    z-index: 5;
}

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

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

.sidebar-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.sidebar-card-body {
    padding: 22px;
}

.sidebar-card-body h3 {
    font-size: 18px;
    font-weight: 800;
    margin-bottom: 10px;
}

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

.sidebar-card-body a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 700;
    font-size: 14px;
    color: var(--primary);
}

.sidebar-card-body a:hover {
    color: var(--primary-dark);
    gap: 10px;
}

.sidebar-card.sidebar-nav {
    padding: 24px 22px;
}

.sidebar-card.sidebar-nav h3 {
    font-size: 18px;
    font-weight: 800;
    margin-bottom: 14px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.sidebar-nav-list li + li {
    border-top: 1px solid var(--border);
}

.sidebar-nav-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 13px 6px;
    font-size: 14px;
    color: var(--text);
    font-weight: 600;
    border-radius: 8px;
    transition: var(--transition);
}

.sidebar-nav-list a:hover {
    color: var(--primary);
    padding-left: 12px;
}

.sidebar-nav-list a::after {
    content: "→";
    color: var(--text-weak);
    font-weight: 700;
}

.sidebar-faq {
    padding: 24px 22px;
}

.sidebar-faq h3 {
    font-size: 18px;
    font-weight: 800;
    margin-bottom: 14px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.faq-item {
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-item summary {
    cursor: pointer;
    font-size: 14px;
    font-weight: 700;
    color: var(--text);
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 4px 0;
    transition: var(--transition);
}

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

.faq-item summary::after {
    content: "+";
    font-size: 18px;
    color: var(--primary);
    font-weight: 700;
    flex-shrink: 0;
}

.faq-item[open] summary::after {
    content: "−";
}

.faq-item p {
    font-size: 13px;
    color: var(--text-weak);
    line-height: 1.7;
    padding-top: 8px;
}

.resources-section {
    padding: 80px 0 70px;
    background: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.section-head {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 46px;
}

.section-kicker {
    display: inline-block;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--primary);
    text-transform: uppercase;
    margin-bottom: 10px;
}

.section-head h2 {
    font-size: clamp(24px, 3vw, 34px);
    font-weight: 800;
    color: var(--text);
    margin-bottom: 14px;
    line-height: 1.4;
}

.section-head p {
    color: var(--text-weak);
    font-size: 16px;
    line-height: 1.8;
}

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

.resource-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: block;
}

.resource-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(22, 93, 255, 0.3);
}

.resource-card img {
    width: 100%;
    height: 190px;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.resource-card:hover img {
    transform: scale(1.04);
}

.resource-body {
    padding: 24px;
}

.resource-body h3 {
    font-size: 18px;
    font-weight: 800;
    margin-bottom: 10px;
    color: var(--text);
}

.resource-body p {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.7;
    margin-bottom: 16px;
}

.resource-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
    transition: var(--transition);
}

.resource-card:hover .resource-link {
    gap: 10px;
    color: var(--primary-dark);
}

.cta-section {
    padding: 76px 0;
    background: linear-gradient(130deg, #0e2138 0%, #123659 60%, #165dff 130%);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-3.png');
    background-size: cover;
    background-position: center;
    opacity: 0.15;
}

.cta-inner {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.cta-inner h2 {
    color: #fff;
    font-size: clamp(24px, 3vw, 34px);
    font-weight: 800;
    line-height: 1.4;
    margin-bottom: 10px;
}

.cta-inner p {
    color: rgba(255, 255, 255, 0.78);
    font-size: 16px;
    line-height: 1.8;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-pill);
    font-weight: 700;
    font-size: 15px;
    white-space: nowrap;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 10px 26px rgba(22, 93, 255, 0.32);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 14px 30px rgba(22, 93, 255, 0.4);
    color: #fff;
}

.btn-light {
    background: #fff;
    color: var(--primary-dark);
    box-shadow: 0 10px 26px rgba(0, 0, 0, 0.18);
}

.btn-light:hover {
    background: var(--accent);
    color: #1b2430;
    transform: translateY(-2px);
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.22);
}

.not-found-page {
    padding: 200px 0 100px;
    min-height: 70vh;
    display: flex;
    align-items: center;
}

.not-found-card {
    max-width: 560px;
    margin: 0 auto;
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    padding: 56px 44px;
    text-align: center;
}

.not-found-card h1 {
    font-size: 42px;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 14px;
}

.not-found-card p {
    color: var(--text-weak);
    margin-bottom: 28px;
    line-height: 1.8;
}

.site-footer {
    background: #0e1c30;
    color: rgba(255, 255, 255, 0.72);
    padding: 70px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 44px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    margin-bottom: 30px;
}

.footer-brand .brand {
    color: #fff;
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.62);
    max-width: 320px;
}

.footer-col h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 18px;
}

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

.footer-col ul a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.62);
    transition: var(--transition);
}

.footer-col ul a:hover {
    color: var(--accent);
    padding-left: 6px;
}

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

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

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

@media (max-width: 1024px) {
    .article-grid {
        grid-template-columns: 1fr;
        margin-top: -48px;
    }

    .sidebar {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        align-items: stretch;
    }

    .sidebar-card.sidebar-nav,
    .sidebar-faq {
        grid-column: span 1;
    }

    .resource-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .nav-container {
        flex-wrap: wrap;
        border-radius: 20px;
        padding: 12px 18px;
    }

    .main-nav {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        margin: 10px 0 6px;
        padding-top: 12px;
        border-top: 1px solid var(--border);
    }

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

    .nav-link {
        width: 100%;
        justify-content: center;
        padding: 12px;
    }

    .nav-cta {
        margin-left: auto;
        padding: 8px 16px;
        font-size: 13px;
    }

    .nav-toggle {
        display: flex;
    }

    .article-hero {
        padding: 150px 0 90px;
    }

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

    .article-section {
        padding-bottom: 60px;
    }

    .article-main {
        padding: 28px 22px;
    }

    .article-grid {
        gap: 24px;
    }

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

    .resources-section {
        padding: 60px 0 50px;
    }

    .resource-grid {
        grid-template-columns: 1fr;
        max-width: 420px;
        margin: 0 auto;
    }

    .cta-inner {
        flex-direction: column;
        text-align: center;
    }

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

    .footer-brand {
        grid-column: span 2;
    }
}

@media (max-width: 520px) {
    .container {
        padding: 0 18px;
    }

    .brand {
        font-size: 16px;
    }

    .nav-cta {
        display: none;
    }

    .article-hero {
        padding: 130px 0 72px;
    }

    .article-hero h1 {
        font-size: 24px;
    }

    .article-meta {
        gap: 10px;
    }

    .article-main {
        padding: 20px 16px;
    }

    .article-body {
        font-size: 15px;
        line-height: 1.9;
    }

    .article-body h2 {
        font-size: 20px;
    }

    .section-head {
        margin-bottom: 32px;
    }

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

    .not-found-card {
        padding: 40px 24px;
    }

    .not-found-card h1 {
        font-size: 30px;
    }

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

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