/* roulang page: index */
:root{
  --primary:#4f46e5;
  --primary-dark:#4338ca;
  --primary-bg:#eef2ff;
  --accent:#f97316;
  --accent-dark:#ea580c;
  --dark:#0f172a;
  --dark-2:#1e293b;
  --bg:#f8fafc;
  --surface:#ffffff;
  --text:#0f172a;
  --text-weak:#64748b;
  --border:#e2e8f0;
  --radius:18px;
  --radius-sm:10px;
  --shadow:0 20px 50px rgba(15,23,42,.08);
  --shadow-sm:0 4px 18px rgba(15,23,42,.06);
  --transition:all .25s ease;
}
*{margin:0;padding:0;box-sizing:border-box}
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:1.7;font-size:16px}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:var(--transition)}
ul,ol{list-style:none}
button,input{font-family:inherit;font-size:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.85);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.nav-wrap{display:flex;align-items:center;gap:20px;height:72px;position:relative}
.logo{font-weight:800;font-size:19px;line-height:1.35;letter-spacing:.5px;color:var(--text);white-space:nowrap;display:flex;align-items:center;gap:8px}
.logo i{color:var(--primary);font-size:22px}
.logo span{background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.nav-toggle{position:absolute;opacity:0;pointer-events:none}
.nav-menu{display:flex;align-items:center;gap:6px;margin:0 auto}
.nav-link{position:relative;padding:8px 16px;border-radius:var(--radius-sm);color:var(--text-weak);font-weight:600;font-size:15px}
.nav-link:hover{color:var(--text);background:var(--bg)}
.nav-link.active{color:var(--primary);background:var(--primary-bg)}
.nav-tools{display:flex;align-items:center;gap:12px}
.search-box{display:flex;align-items:center;gap:8px;background:var(--bg);border:1px solid var(--border);border-radius:30px;padding:7px 14px;width:220px;transition:var(--transition)}
.search-box:focus-within{border-color:var(--primary);background:#fff;box-shadow:0 0 0 4px rgba(79,70,229,.12)}
.search-box i{color:var(--text-weak);font-size:13px}
.search-box input{border:none;outline:none;background:transparent;width:100%;font-size:13px}
.nav-burger{display:none;background:none;border:2px solid var(--border);border-radius:10px;height:42px;width:42px;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;transition:var(--transition)}
.nav-burger span{display:block;width:18px;height:2px;background:var(--text);border-radius:4px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;border-radius:12px;padding:12px 24px;font-size:15px;border:2px solid transparent;cursor:pointer;transition:var(--transition);line-height:1.4}
.btn:active{transform:translateY(1px)}
.btn:focus-visible{outline:3px solid rgba(79,70,229,.35);outline-offset:2px}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);box-shadow:0 12px 28px rgba(79,70,229,.25)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-dark);box-shadow:0 12px 28px rgba(249,115,22,.28)}
.btn-outline{border-color:var(--border);color:var(--text);background:transparent}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-bg)}
.btn-light{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.28)}
.btn-light:hover{background:rgba(255,255,255,.22)}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:10px}
.hero{position:relative;background:linear-gradient(rgba(15,23,42,.78),rgba(15,23,42,.86)),url('/assets/images/backpic/back-1.png') center/cover no-repeat;color:#fff;padding:110px 0 90px;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(79,70,229,.35),transparent 45%),radial-gradient(circle at 15% 85%,rgba(249,115,22,.2),transparent 40%);pointer-events:none}
.hero-inner{position:relative;z-index:2;max-width:840px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:30px;padding:7px 16px;font-size:13px;font-weight:600;color:#fde68a;margin-bottom:24px}
.hero h1{font-size:52px;line-height:1.18;font-weight:800;margin-bottom:20px;letter-spacing:-1px}
.hero h1 .grad{background:linear-gradient(100deg,#818cf8,#f97316);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-sub{font-size:18px;color:#cbd5e1;max-width:660px;margin-bottom:34px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:54px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;border-top:1px solid rgba(255,255,255,.14);padding-top:30px}
.stat-num{font-size:32px;font-weight:800;color:#fff;line-height:1.4}
.stat-num small{font-size:16px;font-weight:700;color:var(--accent)}
.stat-label{font-size:13px;color:#94a3b8}
.section{padding:90px 0}
.section-head{max-width:720px;margin-bottom:48px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-kicker{display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;color:var(--primary);background:var(--primary-bg);border-radius:30px;padding:6px 14px;margin-bottom:14px}
.section-title{font-size:34px;font-weight:800;line-height:1.3;letter-spacing:-.5px;margin-bottom:14px}
.section-desc{font-size:16px;color:var(--text-weak);line-height:1.7}
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.feature-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:32px 26px;box-shadow:var(--shadow-sm);transition:var(--transition)}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.feature-icon{width:54px;height:54px;border-radius:14px;background:linear-gradient(135deg,var(--primary),#818cf8);color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:20px}
.feature-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--text-weak)}
.category-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
.category-card{position:relative;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:var(--transition);background:var(--surface);border:1px solid var(--border);display:block}
.category-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.category-card .cover{position:relative;height:220px;overflow:hidden}
.category-card .cover img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.category-card:hover .cover img{transform:scale(1.06)}
.category-card .cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 30%,rgba(15,23,42,.72))}
.category-info{position:absolute;left:0;right:0;bottom:0;padding:26px;z-index:2;color:#fff}
.category-tag{display:inline-block;background:rgba(249,115,22,.95);color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:20px;margin-bottom:10px}
.category-info h3{font-size:22px;font-weight:700;margin-bottom:6px}
.category-info p{font-size:14px;color:#cbd5e1;margin-bottom:12px}
.category-link{font-size:14px;font-weight:700;color:#fbbf24}
.category-link i{transition:transform .2s}
.category-card:hover .category-link i{transform:translateX(4px)}
.news-card{display:flex;gap:22px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow-sm);transition:var(--transition)}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:transparent}
.news-thumb{flex:0 0 220px;height:150px;border-radius:14px;overflow:hidden}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-content{display:flex;flex-direction:column;gap:8px;min-width:0}
.news-meta-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.tag{display:inline-block;font-size:12px;font-weight:700;color:var(--primary);background:var(--primary-bg);border-radius:20px;padding:4px 12px}
.tag-sm{font-size:11px;padding:3px 10px}
.news-date{font-size:13px;color:var(--text-weak)}
.news-title{font-size:17px;font-weight:700;color:var(--text);line-height:1.45}
.news-summary{font-size:14px;color:var(--text-weak);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.empty-tip{padding:48px;text-align:center;color:var(--text-weak);background:var(--surface);border:1px dashed var(--border);border-radius:var(--radius);font-size:15px}
.section-more{text-align:center;margin-top:36px}
.process-wrap{display:flex;gap:0;align-items:stretch}
.process-step{flex:1;position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:30px 24px;text-align:center;transition:var(--transition)}
.process-step:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.step-num{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:17px}
.process-step h3{font-size:16px;font-weight:700;margin-bottom:8px}
.process-step p{font-size:13px;color:var(--text-weak)}
.step-arrow{display:flex;align-items:center;color:var(--primary);font-size:20px;padding:0 10px;flex:0 0 auto}
.hud-panel{position:relative;background:linear-gradient(rgba(15,23,42,.9),rgba(15,23,42,.94)),url('/assets/images/backpic/back-2.png') center/cover no-repeat;border-radius:var(--radius);padding:50px;color:#fff;overflow:hidden}
.hud-panel::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(79,70,229,.18),transparent);transform:translateX(-100%);animation:scan 4s infinite}
@keyframes scan{50%{transform:translateX(100%)}}
.hud-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px;position:relative;z-index:2}
.hud-item{border-left:2px solid rgba(249,115,22,.8);padding-left:18px}
.hud-num{font-size:38px;font-weight:800;line-height:1.3;color:#fff}
.hud-num em{font-style:normal;color:var(--accent)}
.hud-label{font-size:13px;color:#94a3b8;margin-top:4px}
.hud-desc{font-size:13px;color:#64748b;margin-top:2px}
.faq-list{max-width:860px;margin:0 auto}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:14px;margin-bottom:14px;overflow:hidden;transition:var(--transition)}
.faq-item summary{cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;font-weight:700;font-size:16px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"\f078";font-family:"Font Awesome 6 Free";font-weight:900;font-size:14px;color:var(--text-weak);transition:transform .3s}
.faq-item[open] summary::after{transform:rotate(180deg);color:var(--primary)}
.faq-item .faq-answer{padding:0 24px 22px;color:var(--text-weak);font-size:15px;line-height:1.8}
.faq-item[open]{border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.08)}
.cta-band{position:relative;background:linear-gradient(110deg,#1e1b4b,var(--primary-dark)),url('/assets/images/backpic/back-3.png') center/cover no-repeat;background-blend-mode:overlay;color:#fff;text-align:center;padding:80px 24px}
.cta-band .container{max-width:820px}
.cta-title{font-size:34px;font-weight:800;margin-bottom:16px}
.cta-desc{color:#cbd5e1;font-size:17px;margin-bottom:32px}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.site-footer{background:var(--dark);color:#94a3b8;padding:70px 0 30px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:48px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.1);margin-bottom:28px}
.footer-brand .logo{color:#fff;margin-bottom:14px}
.footer-brand p{font-size:14px;color:#64748b;max-width:300px;margin-bottom:18px}
.footer-col h4{color:#f1f5f9;font-size:16px;font-weight:700;margin-bottom:16px}
.footer-col a{display:block;padding:6px 0;font-size:14px;color:#94a3b8}
.footer-col a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;font-size:13px;color:#64748b}
.footer-bottom a{color:#94a3b8}
.footer-bottom a:hover{color:#fff}
@media (max-width:1024px){
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:44px}
  .news-thumb{flex-basis:180px}
  .hud-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .site-header{position:relative}
  .nav-menu{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);box-shadow:var(--shadow);padding:14px;flex-direction:column;align-items:stretch;gap:4px;z-index:99}
  .nav-toggle:checked ~ .nav-menu{display:flex}
  .nav-toggle:checked ~ .nav-tools .search-box{display:none}
  .nav-burger{display:flex}
  .search-box{width:170px}
  .hero{padding:80px 0}
  .hero h1{font-size:36px}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .category-grid,.feature-grid{grid-template-columns:1fr}
  .process-wrap{flex-direction:column;gap:16px}
  .step-arrow{transform:rotate(90deg)}
  .news-card{flex-direction:column}
  .news-thumb{flex:0 0 auto;height:180px;width:100%}
  .section{padding:62px 0}
  .section-title{font-size:28px}
  .hud-panel{padding:32px 24px}
  .cta-title{font-size:28px}
}
@media (max-width:520px){
  .nav-tools .search-box{display:none}
  .logo{font-size:16px}
  .hero h1{font-size:28px;letter-spacing:0}
  .hero-actions .btn{width:100%}
  .hero-stats{gap:14px}
  .stat-num{font-size:24px}
  .hud-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;text-align:center}
  .section-title{font-size:24px}
}

/* roulang page: category1 */
:root {
    --primary: #4f7cff;
    --primary-dark: #3a5fd9;
    --primary-light: #7d9dff;
    --accent: #ffb347;
    --accent-dark: #e8962a;
    --dark: #0b0f1a;
    --dark-2: #121a2b;
    --dark-3: #1a2438;
    --bg: #f4f6fb;
    --card: #ffffff;
    --text: #1a1d29;
    --text-weak: #66708a;
    --border: #e4e8f0;
    --radius: 18px;
    --radius-sm: 10px;
    --shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.13);
    --spacing: 96px;
    --container: 1200px;
    --header-h: 72px;
  }

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

  html {
    scroll-behavior: smooth;
  }

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

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

  a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s;
  }

  ul, ol {
    list-style: none;
  }

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

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

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 26px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 15px;
    line-height: 1;
    transition: all 0.25s ease;
    cursor: pointer;
    white-space: nowrap;
  }

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

  .btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 18px rgba(79, 124, 255, 0.35);
  }
  .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(79, 124, 255, 0.4);
  }

  .btn-accent {
    background: linear-gradient(135deg, #ffb347, #ff9a3d);
    color: #1a1d29;
    box-shadow: 0 4px 18px rgba(255, 179, 71, 0.35);
  }
  .btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(255, 179, 71, 0.45);
  }

  .btn-outline {
    background: transparent;
    color: #e8ecf4;
    border: 1.5px solid rgba(255, 255, 255, 0.5);
  }
  .btn-outline:hover {
    border-color: #fff;
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-2px);
  }

  .btn-dark {
    background: var(--dark);
    color: #fff;
  }
  .btn-dark:hover {
    background: var(--dark-3);
    transform: translateY(-2px);
  }

  .btn-sm {
    padding: 9px 18px;
    font-size: 14px;
  }

  .btn-lg {
    padding: 15px 34px;
    font-size: 16px;
  }

  .section-header {
    text-align: center;
    margin-bottom: 52px;
  }

  .section-header .tag {
    display: inline-block;
    background: rgba(79, 124, 255, 0.1);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 18px;
    border-radius: 999px;
    margin-bottom: 16px;
    letter-spacing: 1px;
  }

  .section-header h2 {
    font-size: 36px;
    font-weight: 800;
    line-height: 1.3;
    color: var(--text);
    letter-spacing: -0.5px;
  }

  .section-header p {
    color: var(--text-weak);
    font-size: 16px;
    max-width: 620px;
    margin: 12px auto 0;
  }

  /* ===== Header / Nav ===== */
  .site-header {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    position: sticky;
    top: 0;
    z-index: 200;
    border-bottom: 1px solid var(--border);
    height: var(--header-h);
    box-shadow: 0 2px 12px rgba(15, 23, 42, 0.05);
  }

  .nav-wrap {
    display: flex;
    align-items: center;
    height: var(--header-h);
    gap: 28px;
  }

  .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: -0.5px;
    flex-shrink: 0;
  }

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

  .nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
  }

  .nav-link {
    padding: 10px 18px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-weak);
    transition: all 0.22s;
    position: relative;
  }

  .nav-link:hover {
    color: var(--primary);
    background: rgba(79, 124, 255, 0.06);
  }

  .nav-link.active {
    color: var(--primary);
    background: rgba(79, 124, 255, 0.12);
    font-weight: 600;
  }

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

  .search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #f1f4fa;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 8px 16px;
    width: 220px;
    transition: all 0.25s;
  }

  .search-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 124, 255, 0.12);
    background: #fff;
  }

  .search-box i {
    color: var(--text-weak);
    font-size: 14px;
  }

  .search-box input {
    border: none;
    background: transparent;
    font-size: 14px;
    width: 100%;
    color: var(--text);
  }

  .search-box input::placeholder {
    color: #9aa3b8;
  }

  .nav-toggle {
    display: none;
  }

  .nav-burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
  }

  .nav-burger span {
    width: 22px;
    height: 2px;
    background: var(--dark);
    border-radius: 4px;
    transition: all 0.3s;
  }

  /* ===== Page Hero ===== */
  .page-hero {
    position: relative;
    background: linear-gradient(135deg, rgba(11, 15, 26, 0.92), rgba(18, 26, 43, 0.82)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
    padding: 110px 0 90px;
    color: #fff;
    overflow: hidden;
  }

  .page-hero::after {
    content: '';
    position: absolute;
    top: -40%;
    right: -10%;
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(79, 124, 255, 0.3), transparent 70%);
    pointer-events: none;
  }

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

  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.65);
    margin-bottom: 28px;
  }

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

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

  .page-hero .tag-row {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
  }

  .page-hero .tag-row .tag {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.9);
    font-size: 13px;
    padding: 4px 14px;
    border-radius: 999px;
  }

  .page-hero h1 {
    font-size: 52px;
    font-weight: 900;
    line-height: 1.2;
    letter-spacing: -1px;
    margin-bottom: 18px;
  }

  .page-hero h1 .highlight {
    color: var(--accent);
  }

  .page-hero .lead {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    max-width: 640px;
    margin-bottom: 34px;
    line-height: 1.8;
  }

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

  /* ===== Path Section ===== */
  .path-section {
    padding: var(--spacing) 0;
    background: var(--bg);
  }

  .path-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  .path-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 34px 28px;
    position: relative;
    transition: all 0.3s;
    box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
  }

  .path-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(79, 124, 255, 0.25);
  }

  .path-card .step-num {
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    background: rgba(79, 124, 255, 0.1);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
  }

  .path-card .icon {
    font-size: 30px;
    color: var(--primary);
    margin-bottom: 14px;
  }

  .path-card h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 10px;
  }

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

  /* ===== Compare Section ===== */
  .compare-section {
    padding: var(--spacing) 0;
    background: #fff;
  }

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

  .compare-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 38px 30px;
    background: var(--bg);
    transition: all 0.3s;
    position: relative;
    display: flex;
    flex-direction: column;
  }

  .compare-card.featured {
    background: linear-gradient(150deg, #fff, #f0f4ff);
    border-color: rgba(79, 124, 255, 0.35);
    box-shadow: 0 8px 32px rgba(79, 124, 255, 0.1);
  }

  .compare-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
  }

  .compare-card .badge {
    position: absolute;
    top: 18px;
    right: 18px;
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 999px;
  }

  .compare-card .badge.hot {
    background: var(--accent);
    color: #1a1d29;
  }

  .compare-card .icon-wrap {
    width: 60px;
    height: 60px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    margin-bottom: 22px;
    background: rgba(79, 124, 255, 0.12);
    color: var(--primary);
  }

  .compare-card.featured .icon-wrap {
    background: linear-gradient(135deg, #4f7cff, #7d9dff);
    color: #fff;
    box-shadow: 0 6px 20px rgba(79, 124, 255, 0.3);
  }

  .compare-card h3 {
    font-size: 21px;
    font-weight: 700;
    margin-bottom: 10px;
  }

  .compare-card .desc {
    color: var(--text-weak);
    font-size: 14px;
    line-height: 1.75;
    flex: 1;
    margin-bottom: 18px;
  }

  .compare-card .meta-line {
    font-size: 13px;
    color: var(--text-weak);
    display: flex;
    flex-direction: column;
    gap: 6px;
    border-top: 1px solid var(--border);
    padding-top: 16px;
    margin-bottom: 18px;
  }

  .compare-card .meta-line span i {
    color: var(--primary);
    width: 18px;
  }

  /* ===== Checklist Section ===== */
  .checklist-section {
    padding: var(--spacing) 0;
    background: var(--bg);
  }

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

  .checklist-img {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 4/3;
  }

  .checklist-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .checklist-img .img-tag {
    position: absolute;
    bottom: 16px;
    left: 16px;
    background: rgba(11, 15, 26, 0.7);
    color: #fff;
    backdrop-filter: blur(8px);
    font-size: 13px;
    padding: 6px 16px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.2);
  }

  .checklist-content h2 {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 14px;
    letter-spacing: -0.5px;
  }

  .checklist-content .intro {
    color: var(--text-weak);
    font-size: 16px;
    margin-bottom: 28px;
    line-height: 1.8;
  }

  .check-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .check-list li {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    transition: all 0.25s;
  }

  .check-list li:hover {
    border-color: rgba(79, 124, 255, 0.3);
    box-shadow: 0 4px 16px rgba(79, 124, 255, 0.08);
  }

  .check-list li i {
    color: var(--primary);
    font-size: 18px;
    margin-top: 2px;
  }

  .check-list li .text {
    font-size: 15px;
    font-weight: 500;
  }

  .check-list li .text small {
    display: block;
    color: var(--text-weak);
    font-weight: 400;
    font-size: 13px;
    margin-top: 2px;
  }

  /* ===== Stats Section ===== */
  .stats-section {
    padding: var(--spacing) 0;
    background: linear-gradient(160deg, var(--dark), var(--dark-2)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
    background-blend-mode: overlay;
    color: #fff;
    position: relative;
    overflow: hidden;
  }

  .stats-section::before {
    content: '';
    position: absolute;
    top: -30%;
    left: 30%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(79, 124, 255, 0.18), transparent 70%);
    pointer-events: none;
  }

  .stats-section .section-header h2 {
    color: #fff;
  }

  .stats-section .section-header p {
    color: rgba(255, 255, 255, 0.65);
  }

  .stats-section .section-header .tag {
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent);
  }

  .stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
  }

  .stat-card {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    padding: 36px 28px;
    text-align: center;
    backdrop-filter: blur(6px);
    transition: all 0.3s;
  }

  .stat-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(79, 124, 255, 0.4);
    transform: translateY(-4px);
  }

  .stat-card .num {
    font-size: 44px;
    font-weight: 900;
    color: #fff;
    letter-spacing: -1px;
    line-height: 1.2;
  }

  .stat-card .num span {
    font-size: 24px;
    color: var(--accent);
  }

  .stat-card .label {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    margin-top: 10px;
  }

  /* ===== Articles Section ===== */
  .articles-section {
    padding: var(--spacing) 0;
    background: #fff;
  }

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

  .article-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    background: #fff;
    transition: all 0.3s;
    box-shadow: 0 2px 10px rgba(15, 23, 42, 0.04);
  }

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

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

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

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

  .article-card .thumb .cat-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(11, 15, 26, 0.7);
    backdrop-filter: blur(6px);
    color: #fff;
    font-size: 12px;
    padding: 4px 14px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.2);
  }

  .article-card .body {
    padding: 26px 24px 24px;
  }

  .article-card .body h3 {
    font-size: 19px;
    font-weight: 700;
    line-height: 1.45;
    margin-bottom: 10px;
  }

  .article-card .body p {
    color: var(--text-weak);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 18px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .article-card .meta {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    border-top: 1px solid var(--border);
    padding-top: 16px;
  }

  .article-card .meta .tag {
    font-size: 12px;
    background: rgba(79, 124, 255, 0.08);
    color: var(--primary);
    padding: 3px 12px;
    border-radius: 999px;
    font-weight: 500;
  }

  /* ===== FAQ Section ===== */
  .faq-section {
    padding: var(--spacing) 0;
    background: var(--bg);
  }

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

  .faq-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    transition: all 0.25s;
  }

  .faq-item:hover {
    border-color: rgba(79, 124, 255, 0.3);
  }

  .faq-item summary {
    cursor: pointer;
    padding: 22px 26px;
    font-size: 16px;
    font-weight: 600;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
  }

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

  .faq-item summary::after {
    content: '\f078';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--primary);
    font-size: 14px;
    transition: transform 0.3s;
    flex-shrink: 0;
  }

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

  .faq-item .faq-body {
    padding: 0 26px 22px;
    color: var(--text-weak);
    font-size: 15px;
    line-height: 1.8;
    border-top: 1px solid var(--border);
    margin-top: 4px;
    padding-top: 18px;
  }

  /* ===== CTA Section ===== */
  .cta-section {
    padding: 90px 0;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  .cta-section::before {
    content: '';
    position: absolute;
    bottom: -40%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.15), transparent 70%);
  }

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

  .cta-section h2 {
    font-size: 38px;
    font-weight: 900;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
  }

  .cta-section p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.85);
    max-width: 560px;
    margin: 0 auto 36px;
    line-height: 1.8;
  }

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

  .cta-actions .btn-outline {
    border-color: rgba(255, 255, 255, 0.6);
    color: #fff;
  }

  .cta-actions .btn-outline:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: #fff;
  }

  /* ===== Footer ===== */
  .site-footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 72px 0 32px;
  }

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

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

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 52px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    margin-bottom: 32px;
  }

  .footer-brand p {
    color: rgba(255, 255, 255, 0.55);
    font-size: 14px;
    line-height: 1.8;
    max-width: 320px;
  }

  .footer-col h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
  }

  .footer-col a {
    display: block;
    color: rgba(255, 255, 255, 0.55);
    font-size: 14px;
    padding: 6px 0;
    transition: all 0.2s;
  }

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

  .footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
  }

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

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

  /* ===== Responsive ===== */
  @media (max-width: 1024px) {
    :root {
      --spacing: 76px;
    }

    .nav-wrap {
      gap: 16px;
    }

    .nav-link {
      padding: 8px 12px;
      font-size: 14px;
    }

    .search-box {
      width: 160px;
    }

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

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

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

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

    .checklist-wrap {
      gap: 40px;
    }
  }

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

    .nav-wrap {
      position: relative;
    }

    .nav-menu {
      position: absolute;
      top: var(--header-h);
      left: 0;
      right: 0;
      flex-direction: column;
      background: #fff;
      border: 1px solid var(--border);
      border-radius: 0 0 var(--radius) var(--radius);
      box-shadow: var(--shadow-lg);
      padding: 16px 20px;
      gap: 6px;
      display: none;
      z-index: 300;
    }

    .nav-menu .nav-link {
      display: block;
      padding: 12px 16px;
      font-size: 15px;
    }

    .nav-toggle:checked ~ .nav-menu {
      display: flex;
    }

    .nav-burger {
      display: flex;
    }

    .nav-tools .search-box {
      display: none;
    }

    .nav-tools .btn-sm {
      font-size: 13px;
      padding: 8px 14px;
    }

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

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

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

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

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

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

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

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

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 36px;
    }

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

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

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

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

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

    .page-hero {
      padding: 80px 0 60px;
    }

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

    .nav-tools .btn-accent span {
      display: none;
    }

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

    .section-header h2 {
      font-size: 25px;
    }

    .btn-lg {
      padding: 13px 26px;
      font-size: 15px;
    }
  }

/* roulang page: article */
:root{
  --primary:#0b1120;
  --primary-soft:#111a2e;
  --primary-muted:#1c2942;
  --accent:#06b6d4;
  --accent-strong:#0891b2;
  --accent-glow:rgba(6,182,212,.35);
  --warning:#f59e0b;
  --bg:#f0f4f8;
  --surface:#fff;
  --text:#0f172a;
  --text-weak:#64748b;
  --border:#e2e8f0;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 8px 30px rgba(2,12,27,.08);
  --shadow-lg:0 20px 50px rgba(2,12,27,.16);
  --nav-h:72px;
  --space:24px;
  --font-body:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"SF Mono",Consolas,"Liberation Mono",monospace;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  font-size:16px;
  min-height:100vh;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
ul,ol{list-style:none}
.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 24px;
}
::selection{background:rgba(6,182,212,.25);color:#0b1120}

/* header */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(11,17,32,.92);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid rgba(255,255,255,.06);
}
.nav-wrap{
  height:var(--nav-h);
  display:flex;align-items:center;
  justify-content:space-between;
  gap:16px;
}
.logo{
  display:flex;align-items:center;gap:10px;
  font-size:1.06rem;font-weight:800;color:#fff;
  letter-spacing:.02em;white-space:nowrap;
}
.logo i{
  display:flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--accent),var(--accent-strong));
  color:#fff;font-size:15px;
  box-shadow:0 0 18px var(--accent-glow);
}
.logo span{line-height:1.2}
.nav-toggle{display:none}
.nav-menu{
  display:flex;align-items:center;gap:6px;
  flex:1;justify-content:center;
}
.nav-link{
  display:inline-flex;align-items:center;
  padding:8px 14px;border-radius:999px;
  font-size:.9rem;font-weight:500;color:rgba(255,255,255,.72);
  transition:all .2s ease;
  border:1px solid transparent;
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.06)}
.nav-link.active{
  color:#fff;background:rgba(6,182,212,.16);
  border-color:rgba(6,182,212,.4);
}
.nav-tools{
  display:flex;align-items:center;gap:10px;
}
.search-box{
  display:flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.1);
  border-radius:999px;
  padding:7px 14px;
  width:200px;
  transition:all .2s ease;
}
.search-box:focus-within{
  background:rgba(255,255,255,.11);
  border-color:rgba(6,182,212,.5);
  box-shadow:0 0 0 3px rgba(6,182,212,.15);
}
.search-box i{color:rgba(255,255,255,.6);font-size:14px}
.search-box input{
  background:transparent;border:none;outline:none;
  color:#fff;font-size:.88rem;width:100%;
}
.search-box input::placeholder{color:rgba(255,255,255,.45)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  gap:8px;border:none;cursor:pointer;
  border-radius:12px;font-weight:600;
  transition:all .2s ease;
  text-align:center;line-height:1.2;
}
.btn-sm{height:38px;padding:0 16px;font-size:.88rem}
.btn-md{height:46px;padding:0 22px;font-size:.95rem}
.btn-lg{height:54px;padding:0 30px;font-size:1rem}
.btn-accent{
  background:linear-gradient(135deg,var(--accent),var(--accent-strong));
  color:#fff;
  box-shadow:0 6px 20px rgba(6,182,212,.35);
}
.btn-accent:hover{
  box-shadow:0 8px 26px rgba(6,182,212,.5);
  transform:translateY(-2px);
  color:#fff;
}
.btn-accent:active{transform:translateY(0)}
.btn-outline{
  background:transparent;color:#fff;
  border:1px solid rgba(255,255,255,.35);
}
.btn-outline:hover{
  border-color:var(--accent);
  color:var(--accent);
  background:rgba(6,182,212,.08);
}
.btn-dark{
  background:var(--primary);color:#fff;
  box-shadow:0 6px 18px rgba(11,17,32,.3);
}
.btn-dark:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.nav-burger{
  display:none;flex-direction:column;gap:5px;
  cursor:pointer;padding:8px;border-radius:8px;
}
.nav-burger span{
  width:22px;height:2px;background:#fff;
  border-radius:2px;transition:all .3s ease;
}

/* article hero */
.article-hero{
  position:relative;
  background:linear-gradient(135deg,rgba(6,182,212,.18),rgba(11,17,32,.85)),url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  padding:72px 0 84px;
  color:#fff;
  overflow:hidden;
}
.article-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,17,32,.25),rgba(11,17,32,.45));
  pointer-events:none;
}
.article-hero .container{position:relative;z-index:2}
.breadcrumb{
  display:flex;align-items:center;gap:8px;
  font-size:.84rem;color:rgba(255,255,255,.75);
  margin-bottom:18px;
  flex-wrap:wrap;
}
.breadcrumb a{color:rgba(255,255,255,.75);transition:color .2s}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb i{font-size:.7rem;color:rgba(255,255,255,.45)}
.article-hero h1{
  font-size:2.4rem;font-weight:800;line-height:1.25;
  max-width:820px;margin-bottom:18px;
  text-shadow:0 4px 24px rgba(0,0,0,.3);
  letter-spacing:.01em;
}
.article-meta{
  display:flex;align-items:center;gap:22px;
  flex-wrap:wrap;
  font-size:.9rem;color:rgba(255,255,255,.8);
}
.article-meta span{display:inline-flex;align-items:center;gap:8px}
.article-meta i{color:var(--accent)}
.article-meta .meta-cat{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 14px;border-radius:999px;
  background:rgba(6,182,212,.2);
  border:1px solid rgba(6,182,212,.45);
  color:#fff;font-weight:600;font-size:.82rem;
}
.hero-deco{
  position:absolute;top:50%;right:30px;transform:translateY(-50%);
  width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(6,182,212,.3),transparent 65%);
  z-index:1;pointer-events:none;
}

/* article main */
.article-section{
  padding-top:-10px;
  margin-top:-20px;
  position:relative;z-index:5;
}
.article-main{
  display:grid;
  grid-template-columns:minmax(0,1fr) 330px;
  gap:32px;
  align-items:start;
  padding:32px 0 48px;
}
.article-content-card{
  background:var(--surface);
  border-radius:var(--radius);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  padding:40px;
}
.article-content-card .cover-img{
  width:100%;
  height:340px;
  object-fit:cover;
  border-radius:var(--radius-sm);
  margin-bottom:28px;
  box-shadow:0 12px 30px rgba(2,12,27,.14);
}
.article-content{
  font-size:1.02rem;line-height:1.85;color:#243044;
}
.article-content p{margin-bottom:1.25em}
.article-content h2{
  font-size:1.45rem;font-weight:700;color:var(--text);
  margin:1.6em 0 .7em;letter-spacing:.01em;
  padding-left:14px;
  border-left:4px solid var(--accent);
  border-radius:2px;
}
.article-content h3{
  font-size:1.18rem;font-weight:700;color:var(--text);
  margin:1.3em 0 .55em;
}
.article-content ul,.article-content ol{
  margin:0 0 1.3em;padding-left:1.5em;color:#324058;
}
.article-content ul li{list-style:disc;margin-bottom:.45em}
.article-content ol li{list-style:decimal;margin-bottom:.45em}
.article-content blockquote{
  margin:1.5em 0;padding:18px 22px;
  background:rgba(6,182,212,.06);
  border-left:4px solid var(--accent);
  border-radius:0 10px 10px 0;
  color:#334155;font-style:normal;
}
.article-content blockquote p{margin:0}
.article-content code{
  background:rgba(11,17,32,.06);
  padding:2px 7px;border-radius:5px;
  font-family:var(--font-mono);font-size:.9em;
  color:var(--accent-strong);
}
.article-content a{
  color:var(--accent-strong);
  border-bottom:1px dashed var(--accent-strong);
}
.article-content a:hover{color:var(--accent)}
.article-content img{border-radius:12px;margin:1.4em 0}
.article-tags{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  margin-top:36px;padding-top:26px;
  border-top:1px solid var(--border);
}
.article-tags span{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--bg);
  border:1px solid var(--border);
  color:var(--text-weak);
  padding:6px 14px;border-radius:999px;
  font-size:.85rem;
}
.article-tags i{color:var(--accent-strong)}

/* not found */
.not-found{
  text-align:center;padding:50px 20px 30px;
  width:100%;
}
.not-found i{
  font-size:3.2rem;color:var(--warning);
  margin-bottom:18px;
  display:inline-block;
}
.not-found h2{
  font-size:1.7rem;font-weight:800;margin-bottom:12px;color:var(--text);
}
.not-found p{
  color:var(--text-weak);font-size:.95rem;
  margin-bottom:26px;
}

/* sidebar */
.article-sidebar{
  display:flex;flex-direction:column;gap:24px;
  position:sticky;top:calc(var(--nav-h) + 24px);
}
.side-card{
  border-radius:var(--radius);
  overflow:hidden;
}
.side-card-dark{
  background:linear-gradient(145deg,var(--primary),var(--primary-soft));
  color:#fff;
  border:1px solid rgba(255,255,255,.08);
  box-shadow:var(--shadow-lg);
}
.side-card-inner{padding:26px}
.side-card-head{
  display:flex;align-items:center;gap:12px;
  margin-bottom:20px;
}
.side-card-head i{
  width:38px;height:38px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(6,182,212,.18);
  color:var(--accent);font-size:17px;
}
.side-card-head h3{
  font-size:1rem;font-weight:700;
  letter-spacing:.03em;
}
.side-info-list li{
  display:flex;align-items:flex-start;gap:12px;
  padding:10px 0;
  border-bottom:1px solid rgba(255,255,255,.08);
  font-size:.87rem;
  color:rgba(255,255,255,.75);
}
.side-info-list li:last-child{border-bottom:none}
.side-info-list .label{
  min-width:66px;color:rgba(255,255,255,.5);
  font-weight:500;
}
.side-info-list .value{color:#fff;font-weight:500}
.side-cat-list{display:flex;flex-direction:column;gap:10px}
.side-cat-list a{
  display:flex;align-items:center;justify-content:space-between;
  padding:13px 16px;border-radius:12px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.08);
  color:rgba(255,255,255,.85);
  font-size:.9rem;font-weight:500;
  transition:all .2s ease;
}
.side-cat-list a:hover{
  background:rgba(6,182,212,.15);
  border-color:rgba(6,182,212,.5);
  color:#fff;
  transform:translateX(3px);
}
.side-cat-list a i{color:var(--accent);font-size:.8rem}
.side-quick-btn{
  display:block;margin-top:18px;text-align:center;
  width:100%;
}
.side-plan-list li{
  display:flex;align-items:center;gap:10px;
  padding:8px 0;
  font-size:.88rem;
  color:rgba(255,255,255,.85);
}
.side-plan-list i{color:var(--warning)}

/* related */
.related-section{
  background:var(--surface);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
  padding:56px 0 64px;
}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  margin-bottom:32px;gap:16px;flex-wrap:wrap;
}
.section-head .sub-title{
  font-size:.84rem;font-weight:600;color:var(--accent-strong);
  letter-spacing:.08em;text-transform:uppercase;
  margin-bottom:6px;
}
.section-head h2{
  font-size:1.7rem;font-weight:800;line-height:1.3;
  color:var(--text);
}
.section-head .desc{
  color:var(--text-weak);font-size:.93rem;
  max-width:520px;
}
.related-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:22px;
}
.rel-card{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
  transition:all .25s ease;
  box-shadow:0 2px 12px rgba(2,12,27,.04);
}
.rel-card:hover{
  transform:translateY(-5px);
  box-shadow:var(--shadow-lg);
  border-color:rgba(6,182,212,.35);
}
.rel-card-img-wrap{
  position:relative;
  height:150px;overflow:hidden;
  background:var(--primary-soft);
}
.rel-card-img-wrap img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .4s ease;
}
.rel-card:hover .rel-card-img-wrap img{transform:scale(1.05)}
.rel-card-tag{
  position:absolute;top:12px;left:12px;
  background:rgba(6,182,212,.88);
  color:#fff;font-size:.75rem;font-weight:600;
  padding:4px 10px;border-radius:999px;
  backdrop-filter:blur(4px);
}
.rel-card-body{padding:18px}
.rel-card-body h3{
  font-size:.95rem;font-weight:600;line-height:1.45;
  color:var(--text);margin-bottom:8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rel-card-body h3 a{transition:color .2s}
.rel-card-body h3 a:hover{color:var(--accent-strong)}
.rel-card-body p{
  font-size:.84rem;color:var(--text-weak);
  line-height:1.6;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.rel-card-foot{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:14px;padding-top:12px;
  border-top:1px solid var(--border);
  font-size:.78rem;color:var(--text-weak);
}
.rel-card-foot i{color:var(--accent-strong);font-size:.7rem}

/* faq */
.faq-section{
  padding:64px 0;
  background:var(--bg);
}
.faq-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px;
  max-width:1000px;
  margin:0 auto;
}
.faq-item{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:24px;
  transition:all .22s ease;
  box-shadow:0 2px 10px rgba(2,12,27,.04);
}
.faq-item:hover{
  border-color:rgba(6,182,212,.35);
  box-shadow:var(--shadow);
}
.faq-item i{
  color:var(--accent-strong);font-size:1.1rem;
  display:block;margin-bottom:12px;
}
.faq-item h3{font-size:1rem;font-weight:700;margin-bottom:8px;color:var(--text)}
.faq-item p{font-size:.9rem;color:var(--text-weak);line-height:1.7}

/* cta */
.cta-section{
  position:relative;
  background:linear-gradient(135deg,rgba(11,17,32,.92),rgba(17,26,46,.96)),url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  padding:70px 0;
  color:#fff;
  overflow:hidden;
}
.cta-section::before{
  content:"";position:absolute;top:-100px;right:-100px;
  width:360px;height:360px;border-radius:50%;
  background:radial-gradient(circle,rgba(6,182,212,.28),transparent 65%);
}
.cta-inner{
  position:relative;z-index:2;
  text-align:center;max-width:720px;margin:0 auto;
}
.cta-inner .sub-title{
  font-size:.82rem;font-weight:700;letter-spacing:.1em;
  color:var(--accent);text-transform:uppercase;
  margin-bottom:12px;
  display:inline-block;
  padding:6px 18px;border-radius:999px;
  background:rgba(6,182,212,.14);
  border:1px solid rgba(6,182,212,.4);
}
.cta-inner h2{
  font-size:2rem;font-weight:800;line-height:1.3;
  margin-bottom:16px;
}
.cta-inner p{
  color:rgba(255,255,255,.75);font-size:1rem;
  margin-bottom:30px;
  line-height:1.7;
}
.cta-btns{
  display:flex;gap:14px;justify-content:center;
  flex-wrap:wrap;
}

/* footer */
.site-footer{
  background:var(--primary);
  color:rgba(255,255,255,.75);
  padding-top:56px;
  font-size:.9rem;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr;
  gap:40px;
  padding-bottom:40px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.footer-brand .logo{font-size:1.1rem;margin-bottom:16px}
.footer-brand p{
  line-height:1.75;color:rgba(255,255,255,.6);
  max-width:360px;margin-top:12px;
}
.footer-col h4{
  color:#fff;font-size:.95rem;font-weight:700;
  margin-bottom:16px;letter-spacing:.04em;
}
.footer-col a{
  display:block;color:rgba(255,255,255,.6);
  padding:5px 0;transition:all .2s ease;
}
.footer-col a:hover{color:var(--accent);padding-left:6px}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;
  padding:22px 0 26px;
  font-size:.8rem;color:rgba(255,255,255,.45);
  flex-wrap:wrap;gap:8px;
}
.footer-bottom a{color:rgba(255,255,255,.65)}
.footer-bottom a:hover{color:var(--accent)}

/* responsive */
@media (max-width:1024px){
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .nav-menu{gap:2px}
  .nav-link{padding:8px 10px;font-size:.84rem}
  .search-box{width:150px}
  .article-main{grid-template-columns:1fr}
  .article-sidebar{position:static;flex-direction:row;flex-wrap:wrap}
  .side-card{flex:1 1 260px}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .nav-menu{
    position:fixed;top:var(--nav-h);left:0;right:0;
    background:rgba(11,17,32,.98);
    backdrop-filter:blur(20px);
    flex-direction:column;align-items:flex-start;
    padding:18px 24px 26px;
    gap:6px;
    transform:translateY(-12px);
    opacity:0;pointer-events:none;
    transition:all .25s ease;
    border-bottom:1px solid rgba(255,255,255,.08);
    z-index:99;
    box-shadow:0 20px 50px rgba(0,0,0,.4);
    max-height:calc(100vh - var(--nav-h));
    overflow-y:auto;
  }
  .nav-toggle:checked~.nav-menu{
    transform:translateY(0);
    opacity:1;pointer-events:auto;
  }
  .nav-toggle:checked~.nav-burger span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
  .nav-toggle:checked~.nav-burger span:nth-child(2){opacity:0}
  .nav-toggle:checked~.nav-burger span:nth-child(3){transform:rotate(-45deg) translate(6px,-6px)}
  .nav-link{
    width:100%;font-size:1rem;padding:12px 14px;
    border-radius:12px;
  }
  .nav-tools{
    margin-left:auto;
    gap:8px;
  }
  .search-box{width:38px;justify-content:center;padding:8px}
  .search-box input{display:none}
  .search-box:focus-within{
    position:absolute;right:52px;width:180px;
  }
  .search-box:focus-within input{display:block}
  .nav-burger{display:flex}
  .btn-sm{padding:0 12px;font-size:.8rem}
  .article-hero{padding:52px 0 64px}
  .article-hero h1{font-size:1.7rem}
  .article-content-card{padding:24px}
  .article-content-card .cover-img{height:220px}
  .faq-grid{grid-template-columns:1fr}
  .cta-inner h2{font-size:1.5rem}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .section-head h2{font-size:1.45rem}
}
@media (max-width:520px){
  .related-grid{grid-template-columns:1fr}
  .container{padding:0 14px}
  .site-header .btn-sm{display:none}
  .nav-tools{gap:4px}
  .article-meta{gap:10px}
  .hero-deco{display:none}
  .article-hero h1{font-size:1.4rem}
  .cta-btns .btn{width:100%}
}

/* roulang page: category2 */
:root {
  --primary: #0c111b;
  --primary-light: #151e2e;
  --white: #ffffff;
  --accent: #00d68f;
  --accent-hover: #00b877;
  --accent-soft: rgba(0, 214, 143, 0.14);
  --secondary: #ff8a3e;
  --secondary-soft: rgba(255, 138, 62, 0.12);
  --bg: #f2f5f9;
  --card: #ffffff;
  --text: #1a2233;
  --text-weak: #5b6472;
  --border: #e4e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 16px 40px rgba(14, 20, 32, 0.06);
  --shadow-hover: 0 24px 52px rgba(14, 20, 32, 0.12);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font); color: var(--text); background: var(--bg); line-height: 1.7; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
ul, ol { list-style: none; }

.container { width: min(1200px, 92%); margin: 0 auto; }

/* ===== Header / Navigation ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(12, 17, 27, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.nav-wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; gap: 24px;
}
.logo {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 20px; font-weight: 800; color: #fff; letter-spacing: 0.5px; white-space: nowrap;
}
.logo i { color: var(--accent); font-size: 22px; }
.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-link {
  display: inline-block; padding: 9px 14px; border-radius: 9px;
  color: rgba(255, 255, 255, 0.72); font-size: 14px; font-weight: 500;
  transition: all 0.25s ease; white-space: nowrap;
}
.nav-link:hover { color: #fff; background: rgba(255, 255, 255, 0.08); }
.nav-link.active { color: #fff; background: var(--accent-soft); box-shadow: inset 0 0 0 1px rgba(0, 214, 143, 0.2); }
.nav-tools { display: flex; align-items: center; gap: 12px; }
.search-box {
  display: flex; align-items: center; gap: 8px;
  width: 180px; height: 38px; padding: 0 14px;
  background: rgba(255, 255, 255, 0.08); border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px; color: rgba(255, 255, 255, 0.55);
  transition: all 0.25s ease;
}
.search-box:focus-within { border-color: rgba(0, 214, 143, 0.5); background: rgba(255, 255, 255, 0.12); box-shadow: 0 0 0 4px rgba(0, 214, 143, 0.08); }
.search-box i { font-size: 14px; flex-shrink: 0; }
.search-box input { background: transparent; border: none; outline: none; color: #fff; font-size: 13px; width: 100%; }
.search-box input::placeholder { color: rgba(255, 255, 255, 0.45); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 22px; border-radius: 10px; font-size: 14px; font-weight: 600;
  border: none; cursor: pointer; transition: all 0.25s ease; white-space: nowrap;
}
.btn-sm { height: 38px; padding: 0 18px; font-size: 13px; border-radius: 9px; }
.btn-accent { background: var(--accent); color: #06281d; }
.btn-accent:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 8px 22px rgba(0, 214, 143, 0.25); }
.btn-outline { background: transparent; border: 1.5px solid rgba(255, 255, 255, 0.25); color: #fff; }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); background: rgba(0, 214, 143, 0.08); }

.nav-toggle { display: none; }
.nav-burger { display: none; flex-direction: column; gap: 5px; padding: 6px; cursor: pointer; }
.nav-burger span { width: 22px; height: 2px; background: #fff; border-radius: 2px; transition: all 0.3s ease; }

/* ===== Article Banner ===== */
.article-banner {
  position: relative;
  background: linear-gradient(120deg, rgba(12, 17, 27, 0.92), rgba(12, 17, 27, 0.68)), url("/assets/images/backpic/back-1.png") center/cover no-repeat;
  color: #fff;
  padding: 88px 0 64px;
}
.article-banner::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(12, 17, 27, 0) 0%, rgba(12, 17, 27, 0.4) 100%);
  pointer-events: none;
}
.article-banner .container { position: relative; z-index: 1; }

.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: rgba(255, 255, 255, 0.6); margin-bottom: 22px; }
.breadcrumb a { color: rgba(255, 255, 255, 0.75); transition: all 0.2s; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb i { font-size: 11px; color: rgba(255, 255, 255, 0.4); }

.article-banner h1 {
  font-size: clamp(30px, 4vw, 42px); font-weight: 800; line-height: 1.25;
  max-width: 800px; letter-spacing: 1px; margin-bottom: 20px;
}
.article-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px;
  font-size: 14px; color: rgba(255, 255, 255, 0.72);
}
.article-meta .meta-item { display: inline-flex; align-items: center; gap: 7px; }
.article-meta .meta-item i { color: var(--accent); font-size: 14px; }
.article-meta .category-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 14px; border-radius: 999px;
  background: var(--accent-soft); border: 1px solid rgba(0, 214, 143, 0.25);
  color: #7fffd4; font-weight: 600; font-size: 13px;
  text-decoration: none; transition: all 0.25s;
}
.article-meta .category-pill:hover { background: var(--accent); color: #06281d; }

/* ===== Article Layout ===== */
.article-wrap { padding: 56px 0 72px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 36px; align-items: start; }
.article-main { min-width: 0; }
.article-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 40px 44px;
  box-shadow: var(--shadow);
}

/* ===== Article Body ===== */
.article-lead {
  font-size: 17px; line-height: 1.9; color: #334050;
  border-left: 4px solid var(--accent); padding-left: 18px;
  margin-bottom: 28px; font-weight: 500;
}
.article-body h2 {
  font-size: 25px; font-weight: 750; line-height: 1.4;
  margin: 42px 0 18px; padding-left: 15px;
  border-left: 4px solid var(--accent); letter-spacing: 0.5px;
}
.article-body h3 { font-size: 19px; font-weight: 700; margin: 26px 0 12px; }
.article-body p { margin-bottom: 18px; color: #293241; font-size: 15.5px; }
.article-body strong { font-weight: 700; color: #111827; }
.article-body ul { margin: 0 0 22px 0; }
.article-body ul li {
  position: relative; padding-left: 22px; margin-bottom: 10px; color: #293241;
}
.article-body ul li::before {
  content: "▸"; position: absolute; left: 0; top: 0;
  color: var(--accent); font-weight: bold;
}
.article-body ol { margin: 0 0 22px 0; counter-reset: item; }
.article-body ol > li {
  position: relative; padding-left: 24px; margin-bottom: 12px; color: #293241;
}
.article-body ol > li::before {
  content: counter(item); counter-increment: item;
  position: absolute; left: 0; top: 3px;
  width: 18px; height: 18px; border-radius: 6px;
  background: var(--accent-soft); color: var(--accent);
  font-size: 11px; font-weight: 800; text-align: center; line-height: 18px;
}

/* ===== Data Grid ===== */
.data-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
  margin: 30px 0; padding: 22px;
  background: var(--primary); border-radius: var(--radius);
  background-image: radial-gradient(circle at 20% 20%, rgba(0, 214, 143, 0.12), transparent 50%), radial-gradient(circle at 80% 80%, rgba(255, 138, 62, 0.08), transparent 40%);
}
.data-item { text-align: center; padding: 18px 12px; background: rgba(255, 255, 255, 0.04); border: 1px solid rgba(255, 255, 255, 0.06); border-radius: 12px; }
.data-num { display: block; font-size: 28px; font-weight: 800; color: var(--accent); font-family: "SF Mono", "Consolas", monospace; letter-spacing: 0.5px; }
.data-label { display: block; margin-top: 4px; font-size: 13px; color: rgba(255, 255, 255, 0.6); }

/* ===== Process / Steps ===== */
.process-steps { margin: 0 0 26px 0 !important; }
.process-steps li {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 18px 20px; margin-bottom: 12px;
  background: #f7f9fc; border: 1px solid var(--border); border-radius: 12px;
  transition: all 0.25s;
}
.process-steps li:hover { border-color: rgba(0, 214, 143, 0.4); background: #fafffd; }
.process-steps li::before { content: none !important; }
.process-steps .step-num {
  width: 40px; height: 40px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--primary); color: var(--accent);
  border-radius: 10px; font-weight: 800; font-size: 15px;
  box-shadow: inset 0 0 0 1px rgba(0, 214, 143, 0.2);
}
.process-steps li > div { flex: 1; }
.process-steps li strong { display: block; font-size: 16px; margin-bottom: 4px; }
.process-steps li p { margin: 0; font-size: 14px; color: var(--text-weak); }

/* ===== Process Card ===== */
.process-card {
  margin: 22px 0 30px; padding: 24px;
  background: linear-gradient(135deg, #0c111b 0%, #151e2e 100%);
  border-radius: var(--radius); color: #fff;
  border: 1px solid rgba(0, 214, 143, 0.15);
}
.process-head { font-size: 15px; font-weight: 700; color: #7fffd4; margin-bottom: 18px; display: flex; align-items: center; gap: 8px; }
.process-head::before { content: ""; width: 8px; height: 8px; background: var(--accent); border-radius: 50%; box-shadow: 0 0 12px var(--accent); }
.process-line { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 18px; }
.process-line span { font-size: 14px; font-weight: 600; color: rgba(255, 255, 255, 0.85); }
.process-line i { color: var(--accent); font-size: 13px; }

/* ===== Compare Grid ===== */
.compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 22px 0 30px; }
.compare-card {
  background: #f8fafc; border: 1px solid var(--border); border-radius: 12px;
  padding: 20px 22px; transition: all 0.25s;
}
.compare-card:hover { border-color: rgba(0, 214, 143, 0.4); box-shadow: 0 10px 24px rgba(14, 20, 32, 0.06); }
.compare-card h4 { display: flex; align-items: center; gap: 8px; font-size: 16px; margin-bottom: 12px; }
.compare-card h4 i { color: var(--accent); }
.compare-card ul { margin: 0; }
.compare-card ul li { padding-left: 18px; position: relative; font-size: 14px; color: var(--text-weak); margin-bottom: 8px; }
.compare-card ul li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* ===== Alert Box ===== */
.alert-box {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 16px 20px; margin: 20px 0;
  background: var(--secondary-soft); border: 1px solid rgba(255, 138, 62, 0.2);
  border-left: 4px solid var(--secondary); border-radius: 10px;
}
.alert-box i { color: var(--secondary); font-size: 18px; margin-top: 3px; }
.alert-box p { margin: 0; font-size: 14px; color: #4a3a2a; }

/* ===== Tags & Share ===== */
.article-tags {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  padding-top: 26px; margin-top: 34px; border-top: 1px solid var(--border);
}
.tag-label { font-size: 13px; color: var(--text-weak); font-weight: 600; margin-right: 4px; }
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 14px; border-radius: 999px;
  background: #eef2f7; color: #334155; font-size: 13px; font-weight: 500;
  transition: all 0.2s;
}
.tag:hover { background: var(--accent-soft); color: #0a5c43; }

/* ===== Sidebar ===== */
.article-sidebar { display: flex; flex-direction: column; gap: 24px; position: sticky; top: 96px; }
.sidebar-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow);
}
.sidebar-title {
  display: flex; align-items: center; gap: 8px;
  font-size: 16px; font-weight: 700; margin-bottom: 18px;
  padding-bottom: 12px; border-bottom: 1px solid var(--border);
}
.sidebar-title i { color: var(--accent); }
.toc-list { display: flex; flex-direction: column; gap: 4px; }
.toc-link {
  display: block; padding: 8px 12px; border-radius: 8px;
  font-size: 13.5px; color: var(--text-weak); line-height: 1.5;
  transition: all 0.2s; border-left: 3px solid transparent;
}
.toc-link:hover { background: #f2f5f9; color: var(--text); border-left-color: var(--accent); }

.quick-login-card {
  background: linear-gradient(135deg, #0c111b 0%, #152036 100%);
  color: #fff; border: none; position: relative; overflow: hidden;
}
.quick-login-card::after {
  content: ""; position: absolute; width: 160px; height: 160px;
  background: radial-gradient(circle, rgba(0, 214, 143, 0.2), transparent 70%);
  top: -40px; right: -40px; border-radius: 50%;
}
.quick-login-card .sidebar-title { border-bottom-color: rgba(255, 255, 255, 0.1); color: #fff; }
.quick-login-card .sidebar-title i { color: var(--accent); }
.quick-login-card p { font-size: 13px; color: rgba(255, 255, 255, 0.6); margin-bottom: 20px; }
.quick-login-btn { width: 100%; margin-bottom: 10px; }
.quick-login-sub { width: 100%; background: rgba(255, 255, 255, 0.06); border: 1px solid rgba(255, 255, 255, 0.12); color: #fff; }
.quick-login-sub:hover { background: rgba(255, 255, 255, 0.1); border-color: var(--secondary); color: var(--secondary); }

.hot-list { display: flex; flex-direction: column; }
.hot-item {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 12px 0; border-bottom: 1px solid var(--border);
  transition: all 0.2s;
}
.hot-item:last-child { border-bottom: none; padding-bottom: 0; }
.hot-item:hover .hot-title { color: var(--accent); }
.hot-rank {
  flex-shrink: 0; width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  background: #eef2f7; border-radius: 7px;
  font-size: 12px; font-weight: 800; color: var(--text-weak);
}
.hot-rank.rank-1 { background: var(--secondary-soft); color: var(--secondary); }
.hot-rank.rank-2 { background: rgba(0, 214, 143, 0.12); color: var(--accent); }
.hot-info { flex: 1; }
.hot-title { font-size: 14px; font-weight: 600; line-height: 1.5; display: block; transition: all 0.2s; }
.hot-meta { font-size: 12px; color: var(--text-weak); margin-top: 3px; }

/* ===== Related Section ===== */
.related-section { padding: 0 0 70px; }
.section-header { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 32px; }
.section-title { font-size: 28px; font-weight: 800; letter-spacing: 0.5px; position: relative; padding-left: 16px; }
.section-title::before { content: ""; position: absolute; left: 0; top: 6px; bottom: 6px; width: 5px; border-radius: 4px; background: var(--accent); }
.section-sub { color: var(--text-weak); font-size: 14px; margin-top: 6px; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: all 0.3s ease; display: flex; flex-direction: column;
}
.related-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); border-color: rgba(0, 214, 143, 0.3); }
.card-img { aspect-ratio: 16/9; overflow: hidden; position: relative; }
.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.related-card:hover .card-img img { transform: scale(1.04); }
.card-img::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(12, 17, 27, 0.4));
  pointer-events: none;
}
.card-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.card-meta { display: flex; align-items: center; gap: 10px; font-size: 12px; color: var(--text-weak); margin-bottom: 10px; }
.card-cat { color: var(--accent); font-weight: 700; }
.card-title { font-size: 16px; font-weight: 700; line-height: 1.5; margin-bottom: 8px; transition: all 0.2s; }
.related-card:hover .card-title { color: var(--accent); }
.card-excerpt { font-size: 13.5px; color: var(--text-weak); line-height: 1.7; margin-bottom: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-link { margin-top: auto; font-size: 13px; font-weight: 700; color: var(--text); display: inline-flex; align-items: center; gap: 6px; transition: all 0.2s; }
.card-link i { font-size: 12px; transition: transform 0.2s; }
.related-card:hover .card-link { color: var(--accent); }
.related-card:hover .card-link i { transform: translateX(4px); }

/* ===== FAQ Section ===== */
.faq-section { background: var(--primary); padding: 80px 0; position: relative; overflow: hidden; }
.faq-section::before {
  content: ""; position: absolute; width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(0, 214, 143, 0.12), transparent 70%);
  top: -100px; right: -80px; border-radius: 50%;
}
.faq-section .section-title { color: #fff; }
.faq-section .section-title::before { background: var(--accent); box-shadow: 0 0 20px rgba(0, 214, 143, 0.5); }
.faq-section .section-sub { color: rgba(255, 255, 255, 0.5); }
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; position: relative; z-index: 1; }
.faq-item {
  background: rgba(255, 255, 255, 0.04); border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px; overflow: hidden; transition: all 0.3s ease;
}
.faq-item[open] { border-color: rgba(0, 214, 143, 0.3); background: rgba(255, 255, 255, 0.06); }
.faq-question {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 18px 20px; cursor: pointer; user-select: none;
  color: #fff; font-size: 15px; font-weight: 600; transition: color 0.2s;
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question i { color: var(--accent); font-size: 14px; transition: transform 0.3s ease; flex-shrink: 0; }
.faq-item[open] .faq-question i { transform: rotate(180deg); }
.faq-answer { padding: 0 20px 18px; font-size: 14px; color: rgba(255, 255, 255, 0.65); line-height: 1.8; }

/* ===== CTA Section ===== */
.cta-section { padding: 80px 0; }
.cta-card {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, #0c111b 0%, #17263d 100%);
  border-radius: 24px; padding: 56px;
  text-align: center; color: #fff;
  border: 1px solid rgba(0, 214, 143, 0.12);
}
.cta-card::before {
  content: ""; position: absolute; width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(0, 214, 143, 0.15), transparent 60%);
  top: -180px; left: 50%; transform: translateX(-50%);
}
.cta-card h2 { font-size: 32px; font-weight: 800; margin-bottom: 14px; letter-spacing: 0.5px; }
.cta-card p { font-size: 16px; color: rgba(255, 255, 255, 0.65); max-width: 560px; margin: 0 auto 30px; }
.cta-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; position: relative; z-index: 1; }

/* ===== Footer ===== */
.site-footer { background: #090d15; color: #8b93a7; padding: 70px 0 0; }
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 48px;
  padding-bottom: 44px; border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.footer-brand .logo { margin-bottom: 14px; }
.footer-brand p { font-size: 14px; line-height: 1.8; max-width: 320px; margin-top: 14px; }
.footer-col h4 {
  color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 18px;
  position: relative; padding-bottom: 10px;
}
.footer-col h4::after { content: ""; position: absolute; left: 0; bottom: 0; width: 22px; height: 3px; border-radius: 2px; background: var(--accent); }
.footer-col a {
  display: block; padding: 6px 0; font-size: 14px; color: #8b93a7;
  transition: all 0.2s ease;
}
.footer-col a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px;
  padding: 20px 0 24px; font-size: 13px; color: #5b6472;
}
.footer-bottom a { color: #8b93a7; transition: color 0.2s; }
.footer-bottom a:hover { color: var(--accent); }

/* ===== Focus States ===== */
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; flex-direction: row; flex-wrap: wrap; }
  .sidebar-card { flex: 1; min-width: 240px; }
  .related-grid { grid-template-columns: 1fr 1fr; }
  .nav-menu { gap: 2px; }
  .nav-link { padding: 8px 10px; font-size: 13px; }
  .search-box { width: 160px; }
}

@media (max-width: 768px) {
  .nav-wrap { height: 64px; gap: 12px; }
  .nav-menu {
    position: fixed; top: 64px; left: 0; right: 0;
    background: var(--primary); flex-direction: column; align-items: stretch;
    padding: 16px 20px; gap: 6px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    transform: translateY(-130%); opacity: 0; visibility: hidden;
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 99;
  }
  .nav-toggle:checked ~ .nav-menu {
    transform: translateY(0); opacity: 1; visibility: visible;
  }
  .nav-link { display: block; padding: 12px 16px; font-size: 15px; }
  .nav-link.active { background: var(--accent-soft); }
  .nav-tools { margin-left: auto; }
  .search-box { width: 40px; height: 40px; padding: 0; justify-content: center; border-radius: 12px; }
  .search-box input { display: none; }
  .search-box i { font-size: 16px; }
  .nav-burger { display: flex; order: 3; }
  .nav-burger span { transition: all 0.3s; }
  .nav-toggle:checked ~ .nav-burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle:checked ~ .nav-burger span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked ~ .nav-burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .nav-tools .btn.btn-sm { display: none; }

  .article-banner { padding: 56px 0 44px; }
  .article-card { padding: 26px 22px; }
  .data-grid { grid-template-columns: repeat(2, 1fr); padding: 16px; gap: 10px; }
  .compare-grid { grid-template-columns: 1fr; }
  .process-line { flex-direction: column; align-items: flex-start; gap: 8px; }
  .process-line i { display: none; }
  .related-grid { grid-template-columns: 1fr; gap: 18px; }
  .faq-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-card { padding: 40px 24px; }
  .cta-card h2 { font-size: 26px; }
  .section-title { font-size: 24px; }
  .article-banner h1 { font-size: 28px; }
}

@media (max-width: 520px) {
  .nav-wrap { gap: 8px; }
  .logo { font-size: 17px; }
  .logo i { font-size: 18px; }
  .article-meta { gap: 8px 14px; font-size: 13px; }
  .article-card { padding: 20px 16px; }
  .article-body h2 { font-size: 21px; }
  .article-banner h1 { font-size: 24px; }
  .data-grid { grid-template-columns: 1fr 1fr; }
  .section-header { flex-direction: column; align-items: flex-start; gap: 8px; }
  .cta-actions .btn { width: 100%; }
  .footer-bottom { font-size: 12px; }
}