/* roulang page: index */
:root{
  --primary:#1a5cff;
  --primary-dark:#0f3dbd;
  --primary-light:#e8f0ff;
  --accent:#00c2a8;
  --accent-light:#e6faf6;
  --bg:#f6f9fc;
  --surface:#ffffff;
  --text:#111827;
  --text-weak:#68758c;
  --border:#e5e9f0;
  --radius-sm:8px;
  --radius-md:14px;
  --radius-lg:22px;
  --shadow-sm:0 2px 10px rgba(17,24,39,.05);
  --shadow-md:0 10px 32px rgba(17,24,39,.08);
  --shadow-lg:0 24px 64px rgba(17,24,39,.12);
  --spacing-section:88px;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro SC","PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button,input,select,textarea{font-family:inherit;font-size:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 28px}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(18px);border-bottom:1px solid var(--border);box-shadow:0 1px 8px rgba(17,24,39,.03)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:20px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-icon{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--primary),#3b82f6);display:flex;align-items:center;justify-content:center;color:#fff;font-size:17px;box-shadow:0 4px 12px rgba(26,92,255,.3)}
.logo-text{font-size:20px;font-weight:800;background:linear-gradient(135deg,var(--primary-dark),var(--primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;white-space:nowrap;letter-spacing:-.3px}
.main-nav{display:flex;align-items:center;gap:4px;margin:0 auto}
.main-nav a{display:inline-flex;align-items:center;padding:9px 18px;border-radius:999px;font-size:14.5px;font-weight:500;color:var(--text-weak);transition:all .25s;position:relative}
.main-nav a:hover{color:var(--primary);background:var(--primary-light)}
.main-nav a.active{color:var(--primary);background:var(--primary-light);font-weight:700}
.main-nav a.active::after{content:'';position:absolute;bottom:3px;left:50%;transform:translateX(-50%);width:18px;height:3px;border-radius:2px;background:var(--primary)}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.search-box{position:relative}
.search-box input{width:190px;height:40px;border-radius:999px;border:1px solid var(--border);background:var(--bg);padding:0 40px 0 18px;font-size:13.5px;outline:none;transition:all .25s;color:var(--text)}
.search-box input:focus{border-color:var(--primary);background:#fff;box-shadow:0 0 0 4px rgba(26,92,255,.1)}
.search-box i{position:absolute;right:15px;top:50%;transform:translateY(-50%);color:var(--text-weak);font-size:13px;pointer-events:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:42px;padding:0 22px;border-radius:999px;font-size:14px;font-weight:600;border:none;cursor:pointer;transition:all .25s;white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 14px rgba(26,92,255,.3)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 8px 24px rgba(26,92,255,.35)}
.btn-outline{background:transparent;color:var(--primary);border:1.5px solid var(--primary)}
.btn-outline:hover{background:var(--primary-light);transform:translateY(-2px)}
.btn-outline-light{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.55)}
.btn-outline-light:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-2px)}
.btn-lg{height:52px;padding:0 34px;font-size:15.5px}
.btn-sm{height:34px;padding:0 15px;font-size:12.5px;border-radius:8px}
.hero{position:relative;padding:116px 0 104px;background:linear-gradient(135deg,#0f172a 0%,#1e3a8a 55%,#1d4ed8 100%);color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat;opacity:.28}
.hero::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,23,42,.35) 0%,rgba(15,23,42,.55) 100%)}
.hero-inner{position:relative;z-index:2}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);padding:7px 18px;border-radius:999px;font-size:13px;letter-spacing:.3px;backdrop-filter:blur(6px)}
.hero-badge i{color:#fbbf24}
.hero h1{font-size:46px;line-height:1.22;font-weight:800;margin:24px 0 16px;letter-spacing:-.8px;max-width:640px}
.hero p{font-size:17.5px;color:rgba(255,255,255,.88);max-width:560px;margin-bottom:34px;line-height:1.8}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-actions .btn-lg i{margin-right:2px}
.hero-stats{display:flex;gap:48px;margin-top:52px;padding-top:34px;border-top:1px solid rgba(255,255,255,.2);flex-wrap:wrap}
.hero-stat strong{font-size:30px;font-weight:800;display:block;letter-spacing:-.5px}
.hero-stat span{font-size:14px;color:rgba(255,255,255,.72)}
.section{padding:var(--spacing-section) 0;position:relative}
.section-alt{background:var(--surface)}
.section-head{text-align:center;max-width:720px;margin:0 auto 56px}
.section-kicker{display:inline-block;font-size:12.5px;font-weight:700;color:var(--primary);background:var(--primary-light);padding:6px 18px;border-radius:999px;margin-bottom:14px;letter-spacing:1.2px;text-transform:uppercase}
.section-head h2{font-size:36px;font-weight:800;line-height:1.3;letter-spacing:-.6px;margin-bottom:12px}
.section-head p{color:var(--text-weak);font-size:16px;line-height:1.7}
.steps-grid{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.steps-list .step{display:flex;gap:18px;padding:20px 0;border-bottom:1px solid var(--border)}
.steps-list .step:last-child{border-bottom:none}
.step-num{width:44px;height:44px;border-radius:12px;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:800;flex-shrink:0}
.step h3{font-size:17px;font-weight:700;margin-bottom:4px}
.step p{color:var(--text-weak);font-size:14.5px;line-height:1.65}
.steps-image{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg);position:relative}
.steps-image img{width:100%;height:360px;object-fit:cover}
.steps-image::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(15,23,42,.35));pointer-events:none}
.cat-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.cat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:all .3s;display:flex;flex-direction:column}
.cat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.cat-card .cat-img{height:190px;overflow:hidden;position:relative}
.cat-card .cat-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.cat-card:hover .cat-img img{transform:scale(1.06)}
.cat-card .cat-img::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,transparent 60%,rgba(15,23,42,.28))}
.cat-tag{position:absolute;top:14px;left:14px;background:rgba(255,255,255,.9);color:var(--primary);font-size:12px;font-weight:700;padding:5px 14px;border-radius:999px;box-shadow:var(--shadow-sm);backdrop-filter:blur(4px)}
.cat-body{padding:24px 26px;flex:1;display:flex;flex-direction:column}
.cat-body h3{font-size:19px;font-weight:750;margin-bottom:10px}
.cat-body p{color:var(--text-weak);font-size:14px;line-height:1.7;margin-bottom:18px}
.cat-features{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.cat-features span{font-size:12px;color:var(--text);background:var(--bg);border:1px solid var(--border);padding:4px 12px;border-radius:999px}
.cat-link{margin-top:auto;display:inline-flex;align-items:center;gap:8px;color:var(--primary);font-weight:600;font-size:14px;transition:gap .25s}
.cat-link:hover{gap:14px}
.news-wrapper{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm)}
.news-list{display:flex;flex-direction:column}
.news-item{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:24px 30px;border-bottom:1px solid var(--border);transition:background .25s;position:relative}
.news-item:last-child{border-bottom:none}
.news-item:hover{background:var(--bg)}
.news-item-left{display:flex;flex-direction:column;gap:6px;min-width:0}
.news-tag{display:inline-flex;align-self:flex-start;font-size:11.5px;font-weight:700;color:var(--accent);background:var(--accent-light);padding:3px 12px;border-radius:999px}
.news-item h3{font-size:16px;font-weight:600;line-height:1.45;transition:color .2s;max-width:640px}
.news-item:hover h3{color:var(--primary)}
.news-item p{font-size:13.5px;color:var(--text-weak);max-width:600px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-item-right{display:flex;align-items:center;gap:16px;flex-shrink:0}
.news-item-right time{font-size:13px;color:var(--text-weak);background:var(--bg);padding:5px 12px;border-radius:999px}
.news-arrow{width:36px;height:36px;border-radius:50%;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:13px;transition:all .25s}
.news-item:hover .news-arrow{background:var(--primary);color:#fff;transform:translateX(4px)}
.empty-tip{text-align:center;padding:48px 20px;color:var(--text-weak);font-size:15px}
.stats-band{background:linear-gradient(135deg,#0f172a,#1e3a8a);border-radius:var(--radius-lg);padding:60px 50px;display:grid;grid-template-columns:repeat(4,1fr);gap:36px;color:#fff;position:relative;overflow:hidden}
.stats-band::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:.14}
.stat-item{position:relative;text-align:center;padding:10px 0}
.stat-item i{font-size:26px;color:rgba(255,255,255,.7);margin-bottom:12px;display:block}
.stat-item strong{font-size:36px;font-weight:800;display:block;line-height:1.2;letter-spacing:-.5px}
.stat-item span{font-size:14px;color:rgba(255,255,255,.7)}
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.adv-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:34px 30px;transition:all .3s;position:relative;overflow:hidden}
.adv-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent));transform:scaleX(0);transform-origin:left;transition:transform .4s}
.adv-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:transparent}
.adv-card:hover::before{transform:scaleX(1)}
.adv-icon{width:54px;height:54px;border-radius:14px;background:var(--primary-light);color:var(--primary);font-size:22px;display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.adv-card:nth-child(2) .adv-icon{background:var(--accent-light);color:var(--accent)}
.adv-card:nth-child(3) .adv-icon{background:#fef3c7;color:#d97706}
.adv-card h3{font-size:17.5px;font-weight:700;margin-bottom:10px}
.adv-card p{color:var(--text-weak);font-size:14px;line-height:1.7}
.faq-wrap{max-width:820px;margin:0 auto}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);margin-bottom:14px;transition:all .25s;overflow:hidden}
.faq-item:hover{border-color:var(--primary);box-shadow:var(--shadow-sm)}
.faq-item details{padding:0}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;padding:20px 26px;cursor:pointer;font-size:15.5px;font-weight:600;list-style:none;transition:background .25s}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary i{color:var(--primary);font-size:14px;transition:transform .3s;flex-shrink:0}
.faq-item details[open] summary{background:var(--primary-light)}
.faq-item details[open] summary i{transform:rotate(45deg)}
.faq-answer{padding:0 26px 22px;color:var(--text-weak);font-size:14px;line-height:1.75}
.cta-band{position:relative;border-radius:var(--radius-lg);background:linear-gradient(135deg,var(--primary),#3b82f6);color:#fff;padding:70px 50px;text-align:center;overflow:hidden}
.cta-band::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-3.png') center/cover no-repeat;opacity:.2;mix-blend-mode:overlay}
.cta-inner{position:relative;z-index:2}
.cta-band h2{font-size:30px;font-weight:800;margin-bottom:12px}
.cta-band p{font-size:16px;color:rgba(255,255,255,.85);max-width:520px;margin:0 auto 30px}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn-white{background:#fff;color:var(--primary);box-shadow:0 4px 16px rgba(0,0,0,.15)}
.btn-white:hover{background:#f0f4ff;transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.2)}
.site-footer{background:#0f172a;color:#94a3b8;padding:56px 0 28px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px;margin-bottom:40px}
.footer-brand .logo-text{font-size:20px;-webkit-text-fill-color:#fff;background:none;color:#fff}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.7;color:#94a3b8}
.footer-col h4{font-size:14px;font-weight:700;color:#f1f5f9;margin-bottom:18px;letter-spacing:.5px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:14px;color:#94a3b8;transition:color .25s}
.footer-col ul li a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;font-size:13px;color:#64748b;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.footer-bottom a{color:#94a3b8}
.footer-bottom a:hover{color:#fff}
.menu-toggle{display:none;background:none;border:1px solid var(--border);border-radius:10px;width:42px;height:42px;align-items:center;justify-content:center;cursor:pointer;color:var(--text);font-size:18px;transition:all .25s}
.menu-toggle:hover{border-color:var(--primary);color:var(--primary)}
button:focus,input:focus,a:focus{outline:3px solid rgba(26,92,255,.3);outline-offset:2px}
@media (max-width:1024px){
  .hero h1{font-size:38px}
  .stats-band{grid-template-columns:repeat(2,1fr);padding:48px 36px}
  .adv-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
  .menu-toggle{display:flex}
  .header-inner{height:64px}
  .main-nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;padding:16px 24px;border-bottom:1px solid var(--border);box-shadow:var(--shadow-lg);gap:6px}
  .main-nav.open{display:flex}
  .main-nav a{width:100%;padding:12px 16px;border-radius:10px}
  .main-nav a.active::after{display:none}
  .header-actions{display:none}
  .search-box input{width:150px}
  .steps-grid{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:1fr}
  .adv-grid{grid-template-columns:1fr}
  .section{padding:64px 0}
  .section-head h2{font-size:28px}
  .hero h1{font-size:32px}
  .cta-band{padding:48px 28px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .news-item{flex-direction:column;align-items:flex-start;gap:14px;padding:20px}
  .news-item-right{width:100%;justify-content:space-between}
}
@media (max-width:520px){
  .hero{padding:80px 0 70px}
  .hero h1{font-size:27px}
  .hero p{font-size:15px}
  .hero-stats{gap:28px}
  .hero-stat strong{font-size:24px}
  .hero-actions .btn{width:100%;margin-bottom:4px}
  .section-head h2{font-size:24px}
  .stats-band{grid-template-columns:1fr 1fr;padding:36px 24px;gap:24px}
  .stat-item strong{font-size:28px}
  .cat-body{padding:20px}
  .cta-actions .btn{width:100%}
  .footer-bottom{flex-direction:column;text-align:center}
  .steps-image img{height:240px}
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
    :root {
      --primary: #4f46e5;
      --primary-dark: #3730a3;
      --primary-light: #818cf8;
      --primary-100: #eef2ff;
      --accent: #f59e0b;
      --accent-dark: #d97706;
      --accent-light: #fef3c7;
      --bg: #f8fafc;
      --surface: #ffffff;
      --text: #0f172a;
      --text-weak: #64748b;
      --border: #e2e8f0;
      --radius: 20px;
      --radius-sm: 12px;
      --radius-lg: 32px;
      --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 12px 48px rgba(15, 23, 42, 0.12);
      --transition: all 0.3s ease;
    }

    /* ========== 基础 Reset ========== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    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;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    img { max-width: 100%; display: block; }
    a { text-decoration: none; color: inherit; }
    ul { list-style: none; }
    button { font-family: inherit; }

    /* ========== 通用容器 ========== */
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ========== 头部导航 ========== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border);
    }
    .header-inner {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
      height: 76px;
      display: flex;
      align-items: center;
      gap: 24px;
      position: relative;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .logo-icon {
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 18px;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
    }
    .logo-text {
      font-size: 20px;
      font-weight: 800;
      color: var(--text);
      letter-spacing: -0.4px;
      white-space: nowrap;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 6px;
      margin: 0 auto;
    }
    .main-nav a {
      display: inline-flex;
      align-items: center;
      padding: 10px 20px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-weak);
      transition: var(--transition);
    }
    .main-nav a:hover {
      color: var(--primary);
      background: var(--primary-100);
    }
    .main-nav a.active {
      color: #fff;
      background: var(--primary);
      box-shadow: 0 4px 16px rgba(79, 70, 229, 0.35);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .search-wrap { position: relative; }
    .search-wrap input {
      width: 170px;
      padding: 10px 16px 10px 38px;
      border: 1px solid var(--border);
      border-radius: 999px;
      background: var(--bg);
      font-size: 14px;
      transition: var(--transition);
    }
    .search-wrap input:focus {
      outline: none;
      border-color: var(--primary);
      width: 210px;
      background: #fff;
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
    }
    .search-wrap i {
      position: absolute;
      left: 14px;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-weak);
      font-size: 14px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 11px 24px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 700;
      text-decoration: none;
      transition: var(--transition);
      border: none;
      cursor: pointer;
      line-height: 1.4;
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(79, 70, 229, 0.4);
    }
    .btn-ghost {
      background: transparent;
      color: var(--text);
      border: 1.5px solid var(--border);
    }
    .btn-ghost:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-100);
    }
    .btn-outline-light {
      background: rgba(255, 255, 255, 0.12);
      color: #fff;
      border: 1.5px solid rgba(255, 255, 255, 0.65);
      backdrop-filter: blur(6px);
    }
    .btn-outline-light:hover {
      background: #fff;
      color: var(--primary);
      transform: translateY(-2px);
    }
    .btn-accent {
      background: var(--accent);
      color: #fff;
      box-shadow: 0 4px 18px rgba(245, 158, 11, 0.35);
    }
    .btn-accent:hover {
      background: var(--accent-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 26px rgba(245, 158, 11, 0.45);
    }

    /* ========== 移动端导航 ========== */
    .nav-toggle {
      display: none;
      background: none;
      border: none;
      width: 42px;
      height: 42px;
      border-radius: 10px;
      cursor: pointer;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 5px;
    }
    .nav-toggle span {
      width: 20px;
      height: 2px;
      background: var(--text);
      border-radius: 4px;
      transition: var(--transition);
    }
    .mobile-menu {
      display: none;
      background: #fff;
      border-top: 1px solid var(--border);
      padding: 12px 24px 20px;
      flex-direction: column;
      gap: 4px;
    }
    .mobile-menu.show { display: flex; }
    .mobile-menu a {
      padding: 13px 16px;
      border-radius: 12px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-weak);
      transition: var(--transition);
    }
    .mobile-menu a:hover { background: var(--primary-100); color: var(--primary); }
    .mobile-menu a.active { background: var(--primary); color: #fff; }

    /* ========== 页面横幅（英雄区） ========== */
    .page-banner {
      position: relative;
      padding: 110px 0 100px;
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      color: #fff;
      overflow: hidden;
    }
    .page-banner::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(15, 23, 42, 0.82) 0%, rgba(79, 70, 229, 0.62) 55%, rgba(15, 23, 42, 0.35) 100%);
    }
    .banner-content { position: relative; z-index: 2; max-width: 680px; }
    .banner-content .badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 18px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.16);
      border: 1px solid rgba(255, 255, 255, 0.3);
      font-size: 14px;
      font-weight: 600;
      backdrop-filter: blur(8px);
      margin-bottom: 24px;
    }
    .banner-content h1 {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -1px;
      margin-bottom: 18px;
    }
    .banner-content p {
      font-size: 18px;
      line-height: 1.8;
      color: rgba(255, 255, 255, 0.9);
      margin-bottom: 30px;
    }
    .banner-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    /* ========== 通用板块 ========== */
    .section { padding: 96px 0; }
    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 56px;
    }
    .section-label {
      display: inline-block;
      padding: 6px 16px;
      border-radius: 999px;
      background: var(--primary-100);
      color: var(--primary);
      font-size: 14px;
      font-weight: 700;
      letter-spacing: 0.5px;
      margin-bottom: 16px;
    }
    .section-header h2 {
      font-size: 38px;
      font-weight: 800;
      line-height: 1.3;
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }
    .section-header p {
      font-size: 16px;
      color: var(--text-weak);
      line-height: 1.8;
    }

    /* ========== 指南概览板块 ========== */
    .intro-section { background: var(--surface); border-bottom: 1px solid var(--border); }
    .intro-media { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); position: relative; }
    .intro-media img { width: 100%; height: 420px; object-fit: cover; }
    .intro-media::after {
      content: "ca88登录入口";
      position: absolute;
      bottom: 20px;
      left: 20px;
      padding: 8px 18px;
      background: rgba(15, 23, 42, 0.55);
      backdrop-filter: blur(8px);
      color: #fff;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 600;
      letter-spacing: 1px;
    }
    .intro-content .section-label { margin-bottom: 14px; }
    .intro-content h2 {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.35;
      margin-bottom: 18px;
      letter-spacing: -0.4px;
    }
    .intro-content p {
      color: var(--text-weak);
      font-size: 16px;
      line-height: 1.9;
      margin-bottom: 16px;
    }
    .intro-list { margin-top: 24px; }
    .intro-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 10px 0;
      font-size: 15px;
      color: var(--text);
    }
    .intro-list li i {
      margin-top: 5px;
      color: var(--primary);
      font-size: 16px;
    }

    /* ========== 登录步骤板块 ========== */
    .steps-section { background: var(--bg); }
    .step-card {
      position: relative;
      background: var(--surface);
      border-radius: var(--radius);
      padding: 40px 28px 32px;
      height: 100%;
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      transition: var(--transition);
      overflow: hidden;
    }
    .step-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary-light);
    }
    .step-num {
      font-size: 60px;
      font-weight: 900;
      line-height: 1;
      color: var(--primary-100);
      letter-spacing: -2px;
      margin-bottom: 20px;
    }
    .step-card:nth-child(2) .step-num { color: #e0e7ff; }
    .step-card:nth-child(3) .step-num { color: #c7d2fe; }
    .step-card:nth-child(4) .step-num { color: #a5b4fc; }
    .step-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 18px;
      margin-bottom: 20px;
      box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
    }
    .step-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .step-card p {
      font-size: 15px;
      color: var(--text-weak);
      line-height: 1.8;
    }
    .step-tag {
      display: inline-block;
      margin-top: 16px;
      padding: 5px 14px;
      background: var(--primary-100);
      color: var(--primary);
      border-radius: 999px;
      font-size: 13px;
      font-weight: 600;
    }

    /* ========== 多端适配板块 ========== */
    .devices-section { background: var(--surface); border-top: 1px solid var(--border); }
    .device-card {
      background: var(--bg);
      border-radius: var(--radius);
      padding: 36px 28px;
      height: 100%;
      border: 1px solid var(--border);
      transition: var(--transition);
      text-align: left;
    }
    .device-card:hover {
      background: #fff;
      border-color: var(--primary-light);
      box-shadow: var(--shadow);
      transform: translateY(-4px);
    }
    .device-icon {
      width: 56px;
      height: 56px;
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 20px;
      background: #fff;
      box-shadow: var(--shadow);
    }
    .device-card:nth-child(2) .device-icon { color: var(--primary); }
    .device-card:nth-child(3) .device-icon { color: var(--accent); }
    .device-card:nth-child(4) .device-icon { color: #10b981; }
    .device-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .device-card p {
      font-size: 15px;
      color: var(--text-weak);
      line-height: 1.8;
      margin-bottom: 14px;
    }
    .device-link {
      color: var(--primary);
      font-size: 14px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: var(--transition);
    }
    .device-link:hover { gap: 10px; }

    /* ========== 图文特色板块 ========== */
    .feature-section { background: var(--bg); }
    .feature-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 48px;
      align-items: center;
    }
    .feature-media {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }
    .feature-media img {
      width: 100%;
      height: 460px;
      object-fit: cover;
    }
    .feature-media .play-badge {
      position: absolute;
      top: 24px;
      right: 24px;
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.25);
      backdrop-filter: blur(10px);
      border: 1.5px solid rgba(255, 255, 255, 0.6);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 18px;
    }
    .feature-content h2 {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.35;
      margin-bottom: 16px;
      letter-spacing: -0.4px;
    }
    .feature-content p {
      color: var(--text-weak);
      font-size: 16px;
      line-height: 1.9;
      margin-bottom: 24px;
    }
    .feature-list {}
    .feature-list li {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      padding: 14px 0;
      border-bottom: 1px solid var(--border);
    }
    .feature-list li:last-child { border-bottom: none; }
    .feature-list i {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: #ecfdf5;
      color: #10b981;
      font-size: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      margin-top: 4px;
    }
    .feature-list strong { display: block; font-size: 16px; font-weight: 700; margin-bottom: 4px; }
    .feature-list span { font-size: 14px; color: var(--text-weak); line-height: 1.7; }

    /* ========== FAQ 板块 ========== */
    .faq-section { background: var(--surface); border-top: 1px solid var(--border); }
    .faq-wrap {
      max-width: 860px;
      margin: 0 auto;
    }
    .custom-accordion {
      background: transparent;
      border: none;
      margin: 0;
    }
    .custom-accordion .accordion-item {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      margin-bottom: 16px;
      transition: var(--transition);
      overflow: hidden;
    }
    .custom-accordion .accordion-item:hover {
      border-color: var(--primary-light);
    }
    .custom-accordion .accordion-item.is-active {
      border-color: var(--primary-light);
      box-shadow: 0 4px 20px rgba(79, 70, 229, 0.08);
    }
    .custom-accordion .accordion-title {
      background: transparent;
      border: none;
      color: var(--text);
      font-size: 16px;
      font-weight: 700;
      padding: 22px 28px;
      line-height: 1.6;
      position: relative;
      border-radius: 0;
      display: flex;
      align-items: center;
      gap: 12px;
      transition: var(--transition);
    }
    .custom-accordion .accordion-title:hover {
      background: #fff;
      color: var(--primary);
    }
    .custom-accordion .accordion-title::before {
      content: "\f059";
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      color: var(--primary);
      font-size: 16px;
      opacity: 0.5;
    }
    .custom-accordion .accordion-title::after {
      content: "\f078";
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      color: var(--text-weak);
      position: absolute;
      right: 28px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 13px;
      transition: var(--transition);
    }
    .custom-accordion .accordion-item.is-active > .accordion-title {
      background: #fff;
      color: var(--primary);
    }
    .custom-accordion .accordion-item.is-active > .accordion-title::after {
      transform: translateY(-50%) rotate(180deg);
      color: var(--primary);
    }
    .custom-accordion .accordion-content {
      background: #fff;
      padding: 8px 28px 24px;
      border-top: none;
      border-radius: 0;
    }
    .custom-accordion .accordion-content p {
      margin-bottom: 0;
      color: var(--text-weak);
      font-size: 15px;
      line-height: 1.9;
      padding-left: 28px;
    }

    /* ========== CTA 板块 ========== */
    .cta-section {
      position: relative;
      padding: 100px 0;
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      color: #fff;
      overflow: hidden;
    }
    .cta-section::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(105deg, rgba(15, 23, 42, 0.9) 0%, rgba(79, 70, 229, 0.7) 100%);
    }
    .cta-content {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 720px;
      margin: 0 auto;
    }
    .cta-content .badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 18px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.15);
      border: 1px solid rgba(255, 255, 255, 0.3);
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 22px;
    }
    .cta-content h2 {
      font-size: 38px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }
    .cta-content p {
      font-size: 17px;
      color: rgba(255, 255, 255, 0.85);
      margin-bottom: 32px;
      line-height: 1.8;
    }
    .cta-actions {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 14px;
    }

    /* ========== 页脚 ========== */
    .site-footer {
      background: #0f172a;
      color: rgba(255, 255, 255, 0.75);
      padding: 72px 0 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.8fr 0.8fr;
      gap: 48px;
      padding-bottom: 48px;
    }
    .footer-brand .logo { margin-bottom: 18px; }
    .footer-brand .logo-text { color: #fff; }
    .footer-brand p {
      font-size: 14px;
      line-height: 1.9;
      color: rgba(255, 255, 255, 0.6);
      max-width: 380px;
    }
    .footer-col h4 {
      font-size: 16px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 20px;
    }
    .footer-col ul li { margin-bottom: 12px; }
    .footer-col ul a {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.6);
      transition: var(--transition);
    }
    .footer-col ul a:hover {
      color: var(--primary-light);
      padding-left: 4px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 24px 0;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
      color: rgba(255, 255, 255, 0.45);
    }

    /* ========== 响应式断点 ========== */
    @media (max-width: 1024px) {
      .header-inner { gap: 14px; padding: 0 20px; }
      .main-nav a { padding: 8px 14px; font-size: 14px; }
      .search-wrap input { width: 140px; }
      .search-wrap input:focus { width: 160px; }
      .header-actions .btn { padding: 10px 16px; font-size: 14px; }
      .banner-content h1 { font-size: 40px; }
      .section { padding: 72px 0; }
      .feature-grid { grid-template-columns: 1fr; gap: 32px; }
    }

    @media (max-width: 768px) {
      .header-actions { display: none; }
      .main-nav { display: none; }
      .nav-toggle { display: flex; }
      .page-banner { padding: 70px 0; }
      .banner-content h1 { font-size: 34px; }
      .banner-content p { font-size: 16px; }
      .section { padding: 56px 0; }
      .section-header h2 { font-size: 30px; }
      .footer-grid { grid-template-columns: 1fr; gap: 32px; }
      .intro-media img { height: 300px; }
      .feature-media img { height: 320px; }
      .step-card { padding: 28px 22px; }
    }

    @media (max-width: 520px) {
      .container { padding: 0 16px; }
      .header-inner { height: 64px; padding: 0 16px; }
      .logo-text { font-size: 17px; }
      .logo-icon { width: 36px; height: 36px; font-size: 15px; }
      .banner-content h1 { font-size: 28px; }
      .banner-actions .btn { width: 100%; justify-content: center; }
      .section-header h2 { font-size: 26px; }
      .intro-content h2, .feature-content h2 { font-size: 26px; }
      .custom-accordion .accordion-title { padding: 18px 20px; font-size: 15px; }
      .custom-accordion .accordion-content { padding: 6px 20px 20px; }
      .cta-content h2 { font-size: 28px; }
      .cta-actions .btn { width: 100%; justify-content: center; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }

/* roulang page: article */
:root {
  --primary: #13293d;
  --primary-light: #1d3a55;
  --primary-dark: #0b1a25;
  --accent: #e8a33d;
  --accent-hover: #d38f24;
  --accent-light: #fef5e8;
  --bg: #f4f6fb;
  --white: #ffffff;
  --text: #1a2a3a;
  --text-light: #5e7185;
  --border: #e3e9f0;
  --border-light: #edf1f6;
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 10px rgba(19, 41, 61, 0.06);
  --shadow: 0 8px 30px rgba(19, 41, 61, 0.10);
  --shadow-lg: 0 16px 48px rgba(19, 41, 61, 0.16);
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  color: var(--text);
  background-color: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; width: 100%; }
.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 40px;
}
.section-header.center { flex-direction: column; align-items: center; text-align: center; }
.section-header h2 { font-size: 30px; font-weight: 700; color: var(--primary); line-height: 1.3; letter-spacing: -0.02em; margin: 8px 0 6px; }
.section-header p { color: var(--text-light); font-size: 16px; max-width: 560px; }
.section-header.center p { margin: 0 auto; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-light);
  color: var(--accent-hover);
  font-size: 13px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 999px;
  letter-spacing: 0.02em;
}
.section-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  border: 1px solid var(--border);
  background: var(--white);
  padding: 9px 18px;
  border-radius: 999px;
  transition: var(--transition);
}
.section-link:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow); }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border: 2px solid transparent;
  transition: var(--transition);
  text-align: center;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(19, 41, 61, 0.18); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-light); border-color: var(--primary-light); }
.btn-accent { background: var(--accent); color: var(--primary-dark); }
.btn-accent:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,0.6); }
.btn-outline:hover { background: rgba(255,255,255,0.12); border-color: #fff; }
.btn-sm { padding: 9px 18px; font-size: 13px; }
.badge {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent-hover);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 999px;
  letter-spacing: 0.03em;
}
.empty-text { text-align: center; padding: 40px 20px; color: var(--text-light); background: var(--white); border-radius: var(--radius); font-size: 15px; }
.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 16px rgba(19, 41, 61, 0.05);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 74px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: var(--accent);
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  box-shadow: 0 4px 14px rgba(19, 41, 61, 0.2);
}
.logo-text {
  font-size: 19px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  justify-content: center;
}
.main-nav a {
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-light);
  border-radius: 999px;
  transition: var(--transition);
  white-space: nowrap;
}
.main-nav a:hover { color: var(--primary); background: rgba(19, 41, 61, 0.05); }
.main-nav a.active { color: var(--primary); font-weight: 700; background: rgba(19, 41, 61, 0.07); }
.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 16px;
  min-width: 180px;
  transition: var(--transition);
}
.search-box:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(232, 163, 61, 0.2); background: #fff; }
.search-box i { color: var(--text-light); font-size: 14px; }
.search-box input { border: none; outline: none; background: transparent; font-size: 14px; color: var(--text); width: 100%; }
.menu-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.menu-toggle .bar { width: 24px; height: 2px; background: var(--primary); border-radius: 2px; transition: var(--transition); }
.menu-toggle.active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.active .bar:nth-child(2) { opacity: 0; }
.menu-toggle.active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.article-hero {
  position: relative;
  padding: 80px 0 70px;
  color: #fff;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.article-hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(10,26,40,0.94) 0%, rgba(19,41,61,0.86) 50%, rgba(28,55,82,0.72) 100%); }
.article-hero .container { position: relative; z-index: 1; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 28px;
  flex-wrap: wrap;
}
.breadcrumb a { color: rgba(255,255,255,0.8); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb i { font-size: 11px; opacity: 0.6; }
.breadcrumb .current { color: var(--accent); font-weight: 600; }
.hero-inner { max-width: 840px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(232, 163, 61, 0.18);
  border: 1px solid rgba(232, 163, 61, 0.35);
  color: #f6c776;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.article-hero h1 { font-size: clamp(28px, 4vw, 44px); font-weight: 800; line-height: 1.25; letter-spacing: -0.02em; margin-bottom: 14px; }
.hero-desc { font-size: 17px; color: rgba(255,255,255,0.85); max-width: 700px; line-height: 1.7; margin-bottom: 24px; }
.article-meta { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.meta-item { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; color: rgba(255,255,255,0.75); }
.meta-item i { color: var(--accent); }
.article-main-section { padding: 60px 0 80px; }
.article-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 42px 46px;
  border: 1px solid var(--border);
}
.article-content { font-size: 16px; line-height: 1.9; color: var(--text); }
.article-content h2 { font-size: 24px; font-weight: 700; color: var(--primary); margin: 38px 0 14px; padding-bottom: 10px; border-bottom: 2px solid var(--accent); line-height: 1.4; }
.article-content h3 { font-size: 19px; font-weight: 600; color: var(--primary); margin: 30px 0 10px; }
.article-content h4 { font-size: 16px; font-weight: 600; color: var(--primary); margin: 24px 0 8px; }
.article-content p { margin-bottom: 18px; }
.article-content ul, .article-content ol { margin: 0 0 20px; padding-left: 24px; }
.article-content ul li { list-style: disc; margin-bottom: 6px; }
.article-content ol li { list-style: decimal; margin-bottom: 6px; }
.article-content blockquote {
  margin: 24px 0;
  padding: 18px 24px;
  background: var(--accent-light);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text);
  font-style: italic;
}
.article-content a { color: var(--accent-hover); text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { color: var(--accent); }
.article-content img { border-radius: var(--radius); box-shadow: var(--shadow); margin: 24px 0; }
.article-content table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 14px; }
.article-content table th, .article-content table td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.article-content table th { background: var(--bg); font-weight: 600; color: var(--primary); }
.article-content pre { background: var(--primary-dark); color: #e2e8f0; padding: 20px 24px; border-radius: var(--radius-sm); overflow-x: auto; margin: 24px 0; font-size: 14px; line-height: 1.7; }
.article-content code { font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace; font-size: 14px; background: rgba(19, 41, 61, 0.06); padding: 2px 6px; border-radius: 4px; }
.article-content pre code { background: transparent; padding: 0; }
.article-footer-tags { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; border-top: 1px solid var(--border-light); margin-top: 38px; padding-top: 24px; }
.tag-label { font-size: 14px; color: var(--text-light); font-weight: 500; }
.tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 500;
  background: var(--bg);
  color: var(--text);
  padding: 5px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.tag:hover { background: var(--accent-light); color: var(--accent-hover); border-color: var(--accent); }
.article-share { display: flex; align-items: center; gap: 12px; margin-top: 20px; font-size: 14px; color: var(--text-light); }
.article-share a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  color: var(--primary);
  font-size: 15px;
  transition: var(--transition);
}
.article-share a:hover { background: var(--accent); color: #fff; transform: translateY(-3px); box-shadow: 0 6px 16px rgba(232, 163, 61, 0.3); }
.not-found-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 70px 40px;
  text-align: center;
  border: 1px solid var(--border);
}
.not-found-icon {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}
.not-found-card h2 { font-size: 28px; color: var(--primary); margin-bottom: 10px; }
.not-found-card p { color: var(--text-light); margin-bottom: 24px; }
.sidebar { position: sticky; top: 94px; }
.sidebar-widget {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  padding: 26px;
  margin-bottom: 24px;
}
.sidebar-widget h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-widget h3 i { color: var(--accent); }
.widget-category ul li { margin-bottom: 4px; }
.widget-category ul li a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 14px;
  color: var(--text);
  transition: var(--transition);
}
.widget-category ul li a i { color: var(--text-light); font-size: 12px; transition: var(--transition); }
.widget-category ul li a:hover { background: var(--accent-light); color: var(--accent-hover); }
.widget-category ul li a:hover i { color: var(--accent); transform: translateX(3px); }
.latest-list li { border-bottom: 1px solid var(--border-light); }
.latest-list li:last-child { border-bottom: none; }
.latest-list a { display: block; padding: 12px 0; transition: var(--transition); }
.latest-list a:hover { padding-left: 8px; }
.latest-list-index { display: block; font-size: 12px; color: var(--accent); font-weight: 600; margin-bottom: 3px; }
.latest-list-title { display: block; font-size: 14px; color: var(--text); line-height: 1.5; font-weight: 500; }
.side-empty { color: var(--text-light); font-size: 14px; text-align: center; padding: 16px 0; }
.safety-tip p { display: flex; gap: 8px; font-size: 14px; color: var(--text); margin-bottom: 12px; line-height: 1.6; }
.safety-tip p:last-child { margin-bottom: 0; }
.safety-tip i { color: var(--accent); margin-top: 3px; flex-shrink: 0; }
.side-cta {
  background-size: cover;
  background-position: center;
  border-radius: var(--radius);
  padding: 28px 24px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.side-cta::before { content: ""; position: absolute; inset: 0; background: linear-gradient(140deg, rgba(10, 26, 40, 0.9), rgba(20, 45, 68, 0.75)); }
.side-cta h4, .side-cta p, .side-cta .btn { position: relative; z-index: 1; }
.side-cta h4 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.side-cta p { font-size: 14px; color: rgba(255,255,255,0.85); margin-bottom: 16px; }
.stats-section {
  background: var(--white);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  padding: 44px 0;
}
.stat-card { text-align: center; padding: 18px 14px; }
.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}
.stat-value { display: block; font-size: 30px; font-weight: 800; color: var(--primary); letter-spacing: -0.02em; line-height: 1.2; }
.stat-label { display: block; font-size: 13px; color: var(--text-light); margin-top: 4px; }
.latest-section { padding: 70px 0; }
.post-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}
.post-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.post-cover-link { position: relative; display: block; overflow: hidden; aspect-ratio: 16/10; }
.post-cover { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.post-card:hover .post-cover { transform: scale(1.05); }
.post-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(19, 41, 61, 0.85);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 999px;
  backdrop-filter: blur(4px);
}
.post-body { padding: 24px 24px 22px; flex: 1; display: flex; flex-direction: column; }
.post-body h3 { font-size: 18px; font-weight: 700; line-height: 1.45; margin-bottom: 10px; }
.post-body h3 a { color: var(--primary); }
.post-body h3 a:hover { color: var(--accent-hover); }
.post-body p { font-size: 14px; color: var(--text-light); line-height: 1.65; flex: 1; }
.post-meta { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 16px; font-size: 13px; color: var(--text-light); }
.post-meta i { margin-right: 4px; color: var(--accent); }
.post-read { font-weight: 500; color: var(--primary); }
.faq-section { background: var(--bg); padding: 70px 0; }
.faq-grid { row-gap: 20px; }
.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.faq-item:hover { box-shadow: var(--shadow); border-color: rgba(232, 163, 61, 0.4); }
.faq-question { display: flex; align-items: flex-start; gap: 12px; font-size: 16px; font-weight: 600; color: var(--primary); cursor: pointer; user-select: none; }
.faq-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  margin-top: 1px;
  transition: var(--transition);
}
.faq-item.active .faq-icon { background: var(--accent); color: #fff; transform: rotate(360deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, margin 0.3s ease; }
.faq-item.active .faq-answer { max-height: 400px; margin-top: 14px; }
.faq-answer p { font-size: 14px; color: var(--text-light); line-height: 1.75; }
.cta-section { padding: 30px 0 70px; }
.cta-box {
  background-size: cover;
  background-position: center;
  border-radius: var(--radius-lg);
  color: #fff;
  padding: 60px 56px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.cta-box::before { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(10, 26, 40, 0.94) 0%, rgba(13, 34, 52, 0.88) 60%, rgba(30, 58, 84, 0.78) 100%); }
.cta-content { position: relative; z-index: 1; max-width: 700px; }
.cta-tag { display: inline-flex; align-items: center; gap: 8px; color: var(--accent); font-weight: 600; font-size: 14px; margin-bottom: 16px; }
.cta-box h2 { font-size: clamp(24px, 3.4vw, 36px); font-weight: 800; line-height: 1.3; margin-bottom: 16px; }
.cta-box p { font-size: 16px; color: rgba(255,255,255,0.85); line-height: 1.7; margin-bottom: 28px; }
.cta-buttons { display: flex; gap: 14px; flex-wrap: wrap; }
.site-footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.75);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand .logo-icon { background: rgba(255,255,255,0.08); color: var(--accent); }
.footer-brand .logo-text { color: #fff; }
.footer-brand p { font-size: 14px; line-height: 1.75; max-width: 360px; }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 18px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; color: rgba(255,255,255,0.7); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--accent); padding-left: 6px; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 22px 0;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}
@media (max-width: 1024px) {
  .header-inner { gap: 16px; }
  .search-box { min-width: 140px; }
  .main-nav a { padding: 8px 12px; font-size: 14px; }
  .article-card { padding: 34px 30px; }
}
@media (max-width: 768px) {
  .container { padding: 0 18px; }
  .header-inner { flex-wrap: wrap; height: auto; padding: 14px 0; gap: 12px; }
  .logo { margin-right: auto; }
  .menu-toggle { display: flex; }
  .main-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px 0 8px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 16px; text-align: center; font-size: 15px; border-radius: 10px; }
  .header-actions { order: 3; width: 100%; justify-content: space-between; }
  .search-box { flex: 1; }
  .section-header { flex-direction: column; align-items: flex-start; gap: 16px; }
  .section-header.center { align-items: center; }
  .article-hero { padding: 56px 0 48px; }
  .article-hero h1 { font-size: 30px; }
  .article-meta { gap: 12px; }
  .stats-section { padding: 26px 0; }
  .faq-section { padding: 50px 0; }
  .cta-box { padding: 44px 28px; }
  .cta-buttons { flex-direction: column; }
  .cta-buttons .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 520px) {
  .logo-text { font-size: 17px; }
  .header-actions { flex-wrap: wrap; }
  .header-actions .btn-primary { width: 100%; }
  .article-card { padding: 26px 20px; }
  .article-content { font-size: 15px; }
  .section-header h2 { font-size: 24px; }
  .post-body { padding: 20px 18px 18px; }
  .faq-question { font-size: 15px; }
}

/* roulang page: category2 */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --primary-light: #3b82f6;
  --accent: #10b981;
  --accent-soft: #d1fae5;
  --bg: #f8fafc;
  --bg-alt: #f1f5f9;
  --dark: #0f172a;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --white: #ffffff;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 28px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
  --space-section: 88px;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color 0.25s ease; }
a:hover { color: var(--primary-dark); }
ul, ol { margin: 0; padding: 0; }
li { list-style: none; }
h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 700; line-height: 1.3; color: var(--dark); }
p { margin: 0 0 1rem; }
button, input, select, textarea { font-family: inherit; font-size: inherit; line-height: inherit; }
button { cursor: pointer; border: none; background: none; padding: 0; }

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

/* ==== 导航 ==== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
  gap: 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  font-size: 18px;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}
.logo-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.logo-text span { color: var(--primary); }

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  justify-content: center;
}
.main-nav a {
  padding: 9px 20px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  transition: all 0.3s ease;
  white-space: nowrap;
}
.main-nav a:hover {
  color: var(--primary);
  background: rgba(37, 99, 235, 0.06);
}
.main-nav a.active {
  color: var(--primary);
  background: rgba(37, 99, 235, 0.1);
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.15);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-alt);
  border-radius: 50px;
  padding: 0 16px;
  height: 40px;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}
.search-box:focus-within {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}
.search-box i { color: var(--text-muted); font-size: 14px; }
.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 14px;
  width: 140px;
  padding: 0 10px;
  color: var(--text);
}
.search-box input::placeholder { color: var(--text-muted); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  transition: all 0.3s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(37,99,235,0.3);
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(37,99,235,0.4);
}
.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
  padding: 9px 20px;
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(37,99,235,0.05);
}
.btn-gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: #fff;
  box-shadow: 0 6px 20px rgba(37,99,235,0.25);
}
.btn-gradient:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(37,99,235,0.35);
  color: #fff;
}

.hamburger {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--bg-alt);
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--dark);
}

/* ==== Hero 区 ==== */
.page-hero {
  position: relative;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 60%, #2563eb 100%);
  padding: 88px 0 72px;
  color: #fff;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  background: url('/assets/images/backpic/back-2.png') no-repeat center center / cover;
  opacity: 0.2;
}
.page-hero::after {
  content: "";
  position: absolute;
  top: -60%;
  right: -10%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 {
  color: #fff;
  font-size: 44px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.page-hero p {
  font-size: 17px;
  line-height: 1.8;
  opacity: 0.85;
  max-width: 620px;
  margin-bottom: 30px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 50px;
  padding: 7px 18px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}
.hero-badge i { color: #fbbf24; }
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.hero-actions .btn-white {
  background: #fff;
  color: var(--primary-dark);
  font-weight: 700;
}
.hero-actions .btn-white:hover {
  background: var(--bg-alt);
  transform: translateY(-2px);
  color: var(--primary-dark);
  box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}
.hero-actions .btn-ghost {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.4);
}
.hero-actions .btn-ghost:hover {
  background: rgba(255,255,255,0.12);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
}

/* ==== 板块统一 ==== */
.section {
  padding: var(--space-section) 0;
}
.section-alt { background: var(--bg-alt); }
.section-white { background: var(--white); }
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-head .section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(37,99,235,0.1);
  color: var(--primary);
  border-radius: 50px;
  padding: 6px 18px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 18px;
}
.section-head h2 {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}
.section-head p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ==== 知识卡片网格 ==== */
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 20px;
}
.knowledge-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.35s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.knowledge-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37,99,235,0.25);
}
.knowledge-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/10;
}
.knowledge-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.knowledge-card:hover .knowledge-thumb img { transform: scale(1.05); }
.knowledge-thumb .tag-float {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(15,23,42,0.75);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 50px;
}
.knowledge-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.knowledge-body h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.4;
  transition: color 0.3s;
}
.knowledge-body h3 a { color: var(--dark); }
.knowledge-body h3 a:hover { color: var(--primary); }
.knowledge-body p {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 20px;
  flex: 1;
}
.knowledge-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted);
}
.knowledge-meta .read-more {
  color: var(--primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s;
}
.knowledge-meta .read-more:hover { gap: 10px; }

/* ==== 安全数据卡 ==== */
.data-strip {
  background: var(--dark);
  padding: 60px 0;
  color: #fff;
}
.data-strip .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}
.data-item {
  text-align: center;
  padding: 24px 16px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  transition: all 0.3s;
}
.data-item:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-4px);
}
.data-item .number {
  font-size: 42px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 6px;
  font-family: "Helvetica Neue", Arial, sans-serif;
}
.data-item .number span { color: #60a5fa; }
.data-item .label {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  font-weight: 500;
}

/* ==== 流程步骤 ==== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  position: relative;
}
.steps-grid::before {
  content: "";
  position: absolute;
  top: 44px;
  left: 8%;
  right: 8%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-light), var(--accent));
  opacity: 0.2;
  z-index: 0;
}
.step-item {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 24px 18px;
  background: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  transition: all 0.3s;
}
.step-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  margin: 0 auto 16px;
  box-shadow: 0 8px 24px rgba(37,99,235,0.3);
}
.step-item h4 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
}
.step-item p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 0;
  line-height: 1.7;
}

/* ==== 图文内容区块 ==== */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 80px;
}
.feature-row:last-child { margin-bottom: 0; }
.feature-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.feature-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4/3;
}
.feature-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,23,42,0.2), transparent 40%);
}
.feature-content h3 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}
.feature-content h3 span { color: var(--primary); }
.feature-content p {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.feature-list {
  margin-bottom: 24px;
}
.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 8px 0;
  font-size: 15px;
  color: var(--text);
}
.feature-list li i {
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 4px;
  font-size: 14px;
}
.feature-list li strong { color: var(--dark); }

/* ==== FAQ ==== */
.faq-grid {
  max-width: 820px;
  margin: 0 auto;
  display: grid;
  gap: 16px;
}
.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s;
}
.faq-item:hover { border-color: rgba(37,99,235,0.3); box-shadow: var(--shadow-sm); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 28px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--dark);
}
.faq-question i {
  color: var(--primary);
  font-size: 16px;
  transition: transform 0.3s;
  flex-shrink: 0;
}
.faq-item.open .faq-question i { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-answer-inner {
  padding: 0 28px 24px;
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.8;
  border-top: 1px dashed var(--border);
  padding-top: 20px;
}

/* ==== CTA 区 ==== */
.cta-section {
  position: relative;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 60%, #2563eb 100%);
  padding: 80px 0;
  border-radius: 0;
  overflow: hidden;
  text-align: center;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url('/assets/images/backpic/back-3.png') no-repeat center center / cover;
  opacity: 0.15;
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 {
  color: #fff;
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
}
.cta-section p {
  color: rgba(255,255,255,0.85);
  font-size: 16px;
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.8;
}
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ==== 页脚 ==== */
.site-footer {
  background: #0f172a;
  color: rgba(255,255,255,0.65);
  padding: 72px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .logo-text {
  color: #fff;
  font-size: 22px;
}
.footer-brand .logo-icon {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  width: 44px;
  height: 44px;
  font-size: 20px;
}
.footer-brand p {
  margin-top: 20px;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(255,255,255,0.55);
  max-width: 360px;
}
.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 22px;
}
.footer-col ul li {
  margin-bottom: 12px;
}
.footer-col ul li a {
  color: rgba(255,255,255,0.55);
  font-size: 14px;
  transition: all 0.3s;
}
.footer-col ul li a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

/* ==== 相关文章卡片 ==== */
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.article-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.35s ease;
  height: 100%;
}
.article-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: rgba(37,99,235,0.2);
}
.article-card .media {
  overflow: hidden;
  aspect-ratio: 16/9;
}
.article-card .media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.article-card:hover .media img { transform: scale(1.05); }
.article-card .info {
  padding: 22px;
}
.article-card .info .date {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.article-card .info h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.5;
}
.article-card .info h4 a { color: var(--dark); }
.article-card .info h4 a:hover { color: var(--primary); }
.article-card .info p {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 12px;
}

/* ==== 提示卡片 ==== */
.tip-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.tip-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  border: 1px solid var(--border);
  position: relative;
  transition: all 0.3s;
}
.tip-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.tip-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: rgba(37,99,235,0.1);
  color: var(--primary);
  font-size: 26px;
  margin-bottom: 20px;
}
.tip-card:nth-child(2) .tip-icon {
  background: rgba(16,185,129,0.1);
  color: var(--accent);
}
.tip-card:nth-child(3) .tip-icon {
  background: rgba(245,158,11,0.1);
  color: #f59e0b;
}
.tip-card h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}
.tip-card p {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 0;
}

/* ==== 移动端菜单 ==== */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15,23,42,0.5);
  z-index: 200;
  backdrop-filter: blur(4px);
}
.mobile-menu.open { display: block; }
.mobile-menu-panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 300px;
  background: var(--white);
  padding: 24px;
  box-shadow: -20px 0 60px rgba(0,0,0,0.2);
  transform: translateX(100%);
  transition: transform 0.3s ease;
  overflow-y: auto;
}
.mobile-menu.open .mobile-menu-panel { transform: translateX(0); }
.mobile-menu-panel .close-btn {
  float: right;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--dark);
  margin-bottom: 20px;
}
.mobile-menu-panel .panel-links a {
  display: block;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  color: var(--text);
  transition: all 0.3s;
}
.mobile-menu-panel .panel-links a:hover {
  background: var(--bg-alt);
  color: var(--primary);
}
.mobile-menu-panel .panel-links a.active {
  background: rgba(37,99,235,0.1);
  color: var(--primary);
}

/* ==== 响应式 ==== */
@media (max-width: 1024px) {
  .main-nav { gap: 2px; }
  .main-nav a { padding: 8px 14px; font-size: 13px; }
  .search-box input { width: 100px; }
  .knowledge-grid { grid-template-columns: repeat(2, 1fr); }
  .tip-grid { grid-template-columns: repeat(2, 1fr); }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .data-strip .container { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid::before { display: none; }
  .feature-row { grid-template-columns: 1fr; gap: 36px; }
  .feature-row .feature-media { order: -1; }
}

@media (max-width: 768px) {
  :root { --space-section: 60px; }
  .site-header .main-nav, .site-header .header-actions .search-box { display: none; }
  .hamburger { display: flex; }
  .header-inner { height: 64px; }
  .page-hero { padding: 60px 0 50px; }
  .page-hero h1 { font-size: 30px; }
  .page-hero p { font-size: 15px; }
  .section-head h2 { font-size: 28px; }
  .cta-section h2 { font-size: 28px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .container { padding: 0 18px; }
  .header-actions .btn-outline { display: none; }
}

@media (max-width: 520px) {
  .knowledge-grid, .tip-grid, .related-grid { grid-template-columns: 1fr; }
  .data-strip .container { grid-template-columns: 1fr; gap: 16px; }
  .steps-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; }
  .cta-actions { flex-direction: column; align-items: center; }
  .cta-actions .btn { width: 100%; max-width: 320px; }
  .page-hero h1 { font-size: 26px; }
  .feature-content h3 { font-size: 22px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .faq-question { padding: 18px 20px; font-size: 14.5px; }
  .faq-answer-inner { padding: 0 20px 20px; }
}