/* roulang page: index */
:root{
  --primary:#00e5ff;--primary-dim:#00b8d4;--accent:#ff2d78;--accent-dim:#c2185b;
  --bg-deep:#080c14;--bg-body:#0d1420;--bg-card:#131c2c;--bg-card-hover:#182336;
  --border:rgba(255,255,255,.08);--text-main:#e9eef5;--text-weak:#8b9bb5;
  --radius-md:12px;--radius-lg:20px;--shadow-sm:0 2px 12px rgba(0,0,0,.25);
  --shadow-md:0 8px 30px rgba(0,0,0,.35);--glow:0 0 24px rgba(0,229,255,.18);
  --space-section:clamp(56px,7vw,96px);
  --font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-family);background:var(--bg-body);color:var(--text-main);line-height:1.7;font-size:16px;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul,ol{list-style:none}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--primary);outline-offset:2px}
.container{max-width:1260px;margin:0 auto;padding:0 24px}
.section{padding:var(--space-section) 0;position:relative}
.section-alt{background:var(--bg-deep)}
.text-gradient{background:linear-gradient(135deg,var(--primary) 10%,var(--accent) 90%);-webkit-background-clip:text;background-clip:text;color:transparent}
.section-head{max-width:720px;margin:0 auto 48px;text-align:center}
.section-head .tag{display:inline-block;padding:5px 16px;border-radius:20px;background:rgba(0,229,255,.08);border:1px solid rgba(0,229,255,.25);color:var(--primary);font-size:13px;letter-spacing:1px;margin-bottom:14px}
.section-head h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;line-height:1.25;margin-bottom:14px}
.section-head p{color:var(--text-weak);font-size:16px;line-height:1.7}
/* Header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(8,12,20,.92);backdrop-filter:blur(14px);border-bottom:1px solid rgba(0,229,255,.15)}
.header-inner{max-width:1260px;margin:0 auto;padding:0 24px;height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:800;letter-spacing:.3px;color:#fff}
.logo .logo-mark{width:36px;height:36px;border-radius:9px;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;color:#000;font-size:18px;font-weight:900;box-shadow:0 0 18px rgba(0,229,255,.3)}
.logo:hover{color:var(--primary)}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{position:relative;padding:8px 18px;border-radius:8px;font-size:15px;font-weight:500;color:var(--text-weak);transition:all .25s}
.main-nav a:hover{color:#fff;background:rgba(0,229,255,.08)}
.main-nav a.active{color:#fff;background:rgba(0,229,255,.1);box-shadow:inset 0 0 0 1px rgba(0,229,255,.35),0 0 20px rgba(0,229,255,.12)}
.main-nav a.active::after{content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:0;width:22px;height:2px;background:var(--primary);box-shadow:0 0 8px var(--primary)}
.nav-cta{background:linear-gradient(135deg,var(--primary),var(--primary-dim));color:#000;font-weight:600;padding:9px 22px;border-radius:8px;font-size:14px;transition:all .25s;white-space:nowrap}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(0,229,255,.3);color:#000}
.menu-toggle{display:none;width:42px;height:42px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:8px;align-items:center;justify-content:center;color:#fff;font-size:18px}
/* Hero */
.hero{position:relative;min-height:720px;display:flex;align-items:center;justify-content:center;text-align:center;overflow:hidden;padding:100px 24px}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center/cover no-repeat}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,12,20,.84) 0%,rgba(8,12,20,.66) 45%,var(--bg-body) 100%)}
.hero-content{position:relative;z-index:2;max-width:840px}
.hero .badge{display:inline-block;padding:6px 18px;border-radius:20px;background:rgba(0,229,255,.1);border:1px solid rgba(0,229,255,.3);color:var(--primary);font-size:13px;letter-spacing:1px;margin-bottom:24px}
.hero h1{font-size:clamp(32px,5vw,56px);font-weight:900;line-height:1.15;margin-bottom:20px}
.hero p{font-size:clamp(16px,1.5vw,19px);color:var(--text-weak);max-width:660px;margin:0 auto 40px}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{display:inline-block;padding:14px 32px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--primary-dim));color:#000;font-weight:700;font-size:15px;transition:all .25s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(0,229,255,.35)}
.btn-secondary{display:inline-block;padding:14px 32px;border-radius:10px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.18);color:#fff;font-weight:600;font-size:15px;transition:all .25s}
.btn-secondary:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.3);transform:translateY(-2px)}
.hero-stats{display:flex;gap:32px;justify-content:center;margin-top:56px;flex-wrap:wrap}
.hero-stats .item{text-align:center}
.hero-stats .num{font-size:28px;font-weight:800;color:#fff}
.hero-stats .lbl{font-size:13px;color:var(--text-weak);margin-top:4px}
/* Stats overlay */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:-52px;position:relative;z-index:5}
.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:28px 20px;text-align:center;box-shadow:var(--shadow-sm);transition:transform .25s,box-shadow .25s}
.stat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(0,229,255,.3)}
.stat-card .num{font-size:36px;font-weight:900;color:#fff}
.stat-card .num i{font-style:normal;font-size:20px;color:var(--primary)}
.stat-card .label{color:var(--text-weak);font-size:14px;margin-top:6px}
/* Feature cards */
.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:28px 22px;transition:all .25s;position:relative;overflow:hidden}
.feature-card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent));opacity:0;transition:opacity .25s}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(0,229,255,.25)}
.feature-card:hover::before{opacity:1}
.feature-card .icon{width:52px;height:52px;border-radius:14px;background:rgba(0,229,255,.1);display:flex;align-items:center;justify-content:center;font-size:22px;color:var(--primary);margin-bottom:18px}
.feature-card h3{font-size:17px;font-weight:700;margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--text-weak);line-height:1.65}
/* Category entrance */
.cat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.cat-card{display:flex;gap:24px;align-items:center;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;transition:all .3s;overflow:hidden;position:relative}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(0,229,255,.3)}
.cat-card .cat-img{width:160px;height:120px;border-radius:12px;object-fit:cover;flex-shrink:0}
.cat-card .cat-info{flex:1}
.cat-card h3{font-size:20px;font-weight:700;margin-bottom:8px}
.cat-card p{font-size:14px;color:var(--text-weak);margin-bottom:14px}
.cat-card .btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-weight:600;font-size:14px}
.cat-card .btn-text i{transition:transform .2s}
.cat-card:hover .btn-text i{transform:translateX(4px)}
/* News list */
.news-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.news-card{display:flex;gap:18px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px;transition:all .25s}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(0,229,255,.25)}
.news-card .news-thumb{width:150px;height:100px;border-radius:10px;object-fit:cover;flex-shrink:0}
.news-card .news-info{flex:1;min-width:0}
.news-card .badge{display:inline-block;padding:3px 12px;border-radius:12px;background:rgba(255,45,120,.15);border:1px solid rgba(255,45,120,.3);color:var(--accent);font-size:12px;margin-bottom:8px}
.news-card h3{font-size:16px;font-weight:700;margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card p{font-size:13px;color:var(--text-weak);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card .meta{display:flex;gap:16px;margin-top:10px;font-size:12px;color:var(--text-weak)}
.news-card .meta i{margin-right:4px;color:var(--primary)}
/* Steps */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:30px 22px;text-align:center;transition:all .25s;position:relative}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(0,229,255,.25)}
.step-card .step-num{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:800;color:#000;margin:0 auto 16px;box-shadow:0 0 20px rgba(0,229,255,.2)}
.step-card h3{font-size:16px;font-weight:700;margin-bottom:8px}
.step-card p{font-size:13px;color:var(--text-weak);line-height:1.6}
/* 推荐卡片 */
.reco-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.reco-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;transition:all .25s}
.reco-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(255,45,120,.25)}
.reco-card .reco-img{height:180px;object-fit:cover;width:100%}
.reco-card .reco-body{padding:22px}
.reco-card .badge{display:inline-block;padding:3px 12px;border-radius:12px;background:rgba(0,229,255,.1);border:1px solid rgba(0,229,255,.25);color:var(--primary);font-size:12px;margin-bottom:10px}
.reco-card h3{font-size:17px;font-weight:700;margin-bottom:8px}
.reco-card p{font-size:13px;color:var(--text-weak);margin-bottom:12px}
.reco-card .link{color:var(--primary);font-size:14px;font-weight:600}
/* FAQ */
.faq-wrap{max-width:780px;margin:0 auto}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);margin-bottom:12px;overflow:hidden;transition:border-color .2s}
.faq-item:hover{border-color:rgba(0,229,255,.2)}
.faq-item summary{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;cursor:pointer;font-weight:600;font-size:15px;list-style:none}
.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:13px;color:var(--primary);transition:transform .25s}
.faq-item[open] summary::after{transform:rotate(180deg)}
.faq-item .faq-body{padding:0 24px 20px;color:var(--text-weak);font-size:14px;line-height:1.7}
/* CTA */
.cta-section{position:relative;border-radius:var(--radius-lg);padding:56px 32px;text-align:center;overflow:hidden;background:var(--bg-card);border:1px solid rgba(0,229,255,.2)}
.cta-section .cta-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center/cover no-repeat;opacity:.2}
.cta-section .cta-content{position:relative;z-index:2}
.cta-section h2{font-size:clamp(24px,3vw,34px);font-weight:800;margin-bottom:14px}
.cta-section p{color:var(--text-weak);max-width:560px;margin:0 auto 28px}
/* Footer */
.site-footer{background:var(--bg-deep);border-top:1px solid rgba(0,229,255,.1);padding:48px 0 24px;margin-top:40px}
.footer-inner{max-width:1260px;margin:0 auto;padding:0 24px}
.footer-top{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.06)}
.footer-brand .logo{margin-bottom:14px}
.footer-brand p{color:var(--text-weak);font-size:14px;line-height:1.7;max-width:360px}
.footer-col h4{font-size:15px;font-weight:700;margin-bottom:16px;color:#fff}
.footer-col a{display:block;color:var(--text-weak);font-size:14px;padding:4px 0;transition:color .2s}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:20px;font-size:13px;color:var(--text-weak);flex-wrap:wrap;gap:12px}
.footer-bottom a{color:var(--text-weak)}
.footer-bottom a:hover{color:var(--primary)}
/* Responsive */
@media(max-width:1024px){
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .reco-grid{grid-template-columns:repeat(2,1fr)}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .news-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .menu-toggle{display:flex}
  .main-nav{position:fixed;top:72px;left:0;right:0;background:rgba(8,12,20,.98);flex-direction:column;padding:16px 24px;gap:4px;border-bottom:1px solid rgba(0,229,255,.15);transform:translateY(-120%);opacity:0;display:flex;pointer-events:none;transition:all .3s;backdrop-filter:blur(14px)}
  .main-nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .main-nav a{display:block;padding:12px 16px;text-align:center}
  .nav-cta{display:block;text-align:center;margin-top:8px}
  .header-inner{height:64px}
  .hero{min-height:620px;padding:80px 24px}
  .hero h1{font-size:32px}
  .hero-stats{gap:20px;margin-top:40px}
  .cat-grid{grid-template-columns:1fr}
  .cat-card{flex-direction:column;text-align:center;padding:24px}
  .cat-card .cat-img{width:100%;height:180px}
  .news-card{flex-direction:column}
  .news-card .news-thumb{width:100%;height:180px}
  .steps-grid{grid-template-columns:1fr}
  .features-grid{grid-template-columns:1fr}
  .reco-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr;margin-top:-30px}
  .footer-top{grid-template-columns:1fr;gap:24px}
  .footer-bottom{flex-direction:column;text-align:center}
}

/* roulang page: article */
:root {
            --primary: #00e5ff;
            --primary-dim: rgba(0, 229, 255, .12);
            --primary-glow: rgba(0, 229, 255, .35);
            --secondary: #7b61ff;
            --bg-deep: #07090f;
            --bg: #0c0f1a;
            --bg-soft: #11162b;
            --bg-card: #151c36;
            --bg-card-hover: #1a2342;
            --text: #f0f4ff;
            --text-weak: #93a0c0;
            --border: rgba(255, 255, 255, .08);
            --radius: 18px;
            --radius-sm: 10px;
            --shadow: 0 12px 40px rgba(0, 0, 0, .35);
            --shadow-primary: 0 0 24px rgba(0, 229, 255, .22);
            --transition: .3s ease;
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", 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 {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

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

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            background: linear-gradient(135deg, var(--primary), #00b8d4);
            color: #060a14;
            font-weight: 700;
            font-size: 15px;
            border-radius: 999px;
            box-shadow: 0 6px 20px rgba(0, 229, 255, .28);
            transition: all var(--transition);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(0, 229, 255, .38);
            color: #060a14;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(0, 229, 255, .25);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border: 1px solid rgba(255, 255, 255, .18);
            color: var(--text);
            font-weight: 600;
            font-size: 15px;
            border-radius: 999px;
            transition: all var(--transition);
        }

        .btn-ghost:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }

        .btn-primary:focus-visible,
        .btn-ghost:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(7, 9, 15, .82);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 0 rgba(0, 229, 255, .08);
        }

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

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            letter-spacing: .3px;
            flex-shrink: 0;
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #060a14;
            font-weight: 900;
            font-size: 18px;
            box-shadow: 0 0 14px rgba(0, 229, 255, .35);
        }

        .logo-text {
            font-weight: 800;
            color: var(--text);
        }

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

        .main-nav a {
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-weak);
            border-radius: 999px;
            transition: all var(--transition);
        }

        .main-nav a:hover {
            color: var(--text);
            background: rgba(255, 255, 255, .04);
        }

        .main-nav a.active {
            color: var(--primary);
            background: var(--primary-dim);
            text-shadow: 0 0 12px rgba(0, 229, 255, .45);
        }

        .main-nav a.active::after {
            content: "";
            position: absolute;
            left: 50%;
            bottom: 4px;
            width: 24px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            transform: translateX(-50%);
            box-shadow: 0 0 10px var(--primary);
        }

        .main-nav a.nav-cta {
            margin-left: 10px;
            padding: 10px 22px;
            background: rgba(0, 229, 255, .12);
            color: var(--primary);
            border: 1px solid rgba(0, 229, 255, .3);
            font-weight: 600;
        }

        .main-nav a.nav-cta:hover {
            background: rgba(0, 229, 255, .22);
            box-shadow: 0 0 18px rgba(0, 229, 255, .25);
            transform: translateY(-1px);
            color: var(--primary);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            background: rgba(255, 255, 255, .04);
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 80px 0 76px;
            background: url("/assets/images/backpic/back-2.png") center/cover no-repeat;
            border-bottom: 1px solid var(--border);
        }

        .page-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(7, 9, 15, .82), rgba(12, 15, 26, .96));
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
            max-width: 860px;
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-weak);
            margin-bottom: 26px;
        }

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

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

        .breadcrumb .divider {
            opacity: .5;
        }

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

        .post-meta-top {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            margin-bottom: 16px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-dim);
            border: 1px solid rgba(0, 229, 255, .25);
            border-radius: 999px;
            letter-spacing: .3px;
        }

        .meta-date {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--text-weak);
        }

        .meta-date i {
            color: var(--primary);
            font-size: 13px;
        }

        .page-banner h1 {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: .3px;
            color: var(--text);
            text-shadow: 0 4px 24px rgba(0, 0, 0, .35);
            margin-bottom: 14px;
        }

        .post-excerpt {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-weak);
            max-width: 720px;
        }

        .post-source {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-top: 18px;
            font-size: 13px;
            color: var(--text-weak);
        }

        .post-source .avatar {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #060a14;
            font-size: 14px;
            font-weight: 700;
        }

        /* ===== Detail Section ===== */
        .detail-section {
            padding: 70px 0 50px;
            background: var(--bg);
        }

        .detail-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 320px;
            gap: 40px;
            align-items: start;
        }

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

        .article-cover {
            position: relative;
            aspect-ratio: 16/7;
            overflow: hidden;
            background: var(--bg-soft);
        }

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

        .article-cover::after {
            content: "";
            position: absolute;
            inset: auto 0 0 0;
            height: 60px;
            background: linear-gradient(180deg, transparent, var(--bg-card));
        }

        .article-content {
            padding: 38px 44px 30px;
            font-size: 16px;
            line-height: 1.9;
            color: #cbd4ea;
            word-wrap: break-word;
        }

        .article-content h2 {
            font-size: 25px;
            font-weight: 700;
            color: var(--text);
            margin: 36px 0 16px;
            padding-left: 14px;
            border-left: 3px solid var(--primary);
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            margin: 28px 0 12px;
            line-height: 1.4;
        }

        .article-content h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin: 22px 0 10px;
        }

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

        .article-content p:first-of-type {
            font-size: 17px;
            color: #e6ecfa;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 20px;
            padding-left: 24px;
        }

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

        .article-content li::marker {
            color: var(--primary);
        }

        .article-content blockquote {
            border-left: 3px solid var(--primary);
            background: var(--primary-dim);
            padding: 18px 22px;
            margin: 26px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text);
            font-style: normal;
        }

        .article-content blockquote p:last-child {
            margin-bottom: 0;
        }

        .article-content img {
            max-width: 100%;
            border-radius: 12px;
            margin: 22px 0;
            box-shadow: 0 8px 24px rgba(0, 0, 0, .3);
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 4px;
            text-decoration-color: rgba(0, 229, 255, .4);
        }

        .article-content a:hover {
            text-decoration-color: var(--primary);
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 22px 0;
            font-size: 14px;
            background: rgba(255, 255, 255, .02);
            border-radius: 10px;
            overflow: hidden;
        }

        .article-content table th,
        .article-content table td {
            border: 1px solid var(--border);
            padding: 12px 14px;
            text-align: left;
        }

        .article-content table th {
            background: rgba(0, 229, 255, .08);
            color: var(--text);
            font-weight: 600;
        }

        .post-tags {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            padding: 22px 44px;
            border-top: 1px solid rgba(255, 255, 255, .06);
            background: rgba(255, 255, 255, .015);
        }

        .tags-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-weak);
            margin-right: 4px;
        }

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

        .tag-chip {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            font-size: 13px;
            background: var(--primary-dim);
            border: 1px solid rgba(0, 229, 255, .2);
            color: var(--text);
            border-radius: 999px;
            transition: all var(--transition);
        }

        .tag-chip:hover {
            border-color: var(--primary);
            box-shadow: 0 0 12px rgba(0, 229, 255, .2);
        }

        .post-footer-line {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 44px;
            border-top: 1px solid rgba(255, 255, 255, .06);
            font-size: 14px;
            color: var(--text-weak);
        }

        .post-footer-line a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-weight: 600;
        }

        .post-footer-line a:hover {
            text-shadow: 0 0 10px rgba(0, 229, 255, .5);
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 100px;
        }

        .side-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 26px;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .side-card:hover {
            border-color: rgba(0, 229, 255, .25);
            box-shadow: 0 8px 28px rgba(0, 0, 0, .3);
        }

        .side-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .side-card h3 i {
            color: var(--primary);
        }

        .side-link {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 10px 0;
            font-size: 14px;
            color: var(--text-weak);
            border-bottom: 1px dashed rgba(255, 255, 255, .06);
            transition: all var(--transition);
        }

        .side-link:last-child {
            border-bottom: none;
        }

        .side-link i {
            color: var(--primary);
            font-size: 12px;
            margin-top: 5px;
            opacity: .8;
        }

        .side-link:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .cta-card {
            background: linear-gradient(145deg, rgba(0, 229, 255, .1), rgba(123, 97, 255, .08));
            border-color: rgba(0, 229, 255, .2);
        }

        .cta-card p {
            font-size: 14px;
            color: var(--text-weak);
            margin-bottom: 18px;
        }

        .btn-block {
            width: 100%;
        }

        /* ===== Error Box ===== */
        .post-error-box {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 70px 40px;
            text-align: center;
            box-shadow: var(--shadow);
            grid-column: 1 / -1;
        }

        .post-error-box i {
            font-size: 44px;
            color: var(--primary);
            margin-bottom: 20px;
            display: inline-block;
        }

        .post-error-box h2 {
            font-size: 26px;
            margin-bottom: 12px;
            color: var(--text);
        }

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

        .post-error-box .btn-primary {
            min-width: 160px;
        }

        /* ===== Related Section ===== */
        .related-section {
            padding: 70px 0 50px;
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
        }

        .section-head {
            margin-bottom: 36px;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 2px;
            color: var(--primary);
            margin-bottom: 10px;
            text-transform: uppercase;
        }

        .section-head h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--text);
        }

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

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

        .related-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 229, 255, .35);
            box-shadow: 0 14px 36px rgba(0, 0, 0, .4), 0 0 18px rgba(0, 229, 255, .12);
        }

        .related-card .cover {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-soft);
        }

        .related-card .cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

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

        .related-card .card-body {
            padding: 20px 22px 24px;
        }

        .related-card .tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-dim);
            border: 1px solid rgba(0, 229, 255, .2);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
        }

        .related-card h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            color: var(--text);
            margin-bottom: 10px;
            transition: color var(--transition);
        }

        .related-card:hover h3 {
            color: var(--primary);
        }

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

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 80px 0;
            background: url("/assets/images/backpic/back-3.png") center/cover no-repeat;
            position: relative;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(7, 9, 15, .88);
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
        }

        .cta-inner h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 14px;
        }

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

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

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--border);
            padding: 60px 0 0;
        }

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

        .footer-top {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 44px;
            border-bottom: 1px solid rgba(255, 255, 255, .06);
        }

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

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

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: .5px;
        }

        .footer-col a {
            display: block;
            padding: 6px 0;
            font-size: 14px;
            color: var(--text-weak);
            transition: all var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 22px 0;
            font-size: 13px;
            color: rgba(147, 160, 192, .65);
        }

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

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .detail-layout {
                grid-template-columns: 1fr;
            }

            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
            }

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

        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
                padding: 18px 20px 22px;
                background: rgba(7, 9, 15, .97);
                border-bottom: 1px solid var(--border);
                transform: translateY(-12px);
                opacity: 0;
                visibility: hidden;
                transition: all .3s ease;
                z-index: 999;
                box-shadow: 0 20px 40px rgba(0, 0, 0, .4);
            }

            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .main-nav a {
                padding: 12px 16px;
                justify-content: flex-start;
            }

            .main-nav a.nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
                justify-content: center;
            }

            .main-nav a.active::after {
                left: 16px;
                right: auto;
                transform: none;
                width: 18px;
            }

            .page-banner {
                padding: 56px 0 52px;
            }

            .article-content {
                padding: 30px 24px 24px;
            }

            .post-tags {
                padding: 18px 24px;
            }

            .post-footer-line {
                padding: 18px 24px;
            }

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

            .cta-section {
                padding: 60px 0;
            }

            .cta-inner h2 {
                font-size: 26px;
            }

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

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

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

            .logo {
                font-size: 19px;
            }

            .logo-mark {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }

            .page-banner {
                padding: 42px 0 40px;
            }

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

            .post-excerpt {
                font-size: 14px;
            }

            .detail-section {
                padding: 44px 0 36px;
            }

            .article-cover {
                aspect-ratio: 16/10;
            }

            .article-content {
                padding: 24px 18px 18px;
                font-size: 15px;
            }

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

            .article-content blockquote {
                padding: 14px 16px;
            }

            .post-tags {
                padding: 16px 18px;
            }

            .post-footer-line {
                padding: 16px 18px;
                flex-direction: column;
                align-items: flex-start;
            }

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

            .related-section {
                padding: 48px 0 36px;
            }

            .section-head h2 {
                font-size: 22px;
            }

            .cta-inner h2 {
                font-size: 22px;
            }

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

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

            .footer-bottom {
                padding: 18px 0;
                font-size: 12px;
            }
        }

/* roulang page: category1 */
:root{
  --bg:#070b14;
  --bg-soft:#0c1322;
  --card-bg:#101a30;
  --card-border:rgba(0,229,255,.14);
  --primary:#00e5ff;
  --primary-glow:rgba(0,229,255,.32);
  --secondary:#9d5cff;
  --text:#e8f0ff;
  --text-dim:#8a9bb8;
  --border:rgba(255,255,255,.07);
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 10px 36px rgba(0,0,0,.45);
  --shadow-glow:0 0 28px var(--primary-glow);
  --trans:.3s ease;
  --container:1200px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{text-decoration:none;color:inherit;transition:var(--trans);}
ul{list-style:none;}
button{font-family:inherit;border:none;background:none;cursor:pointer;color:inherit;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;}
.section{padding:86px 0;}
.section-head{text-align:center;max-width:720px;margin:0 auto 54px;}
.section-tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 20px;border-radius:999px;
  background:rgba(0,229,255,.08);
  border:1px solid rgba(0,229,255,.22);
  color:var(--primary);font-size:14px;font-weight:600;
  letter-spacing:1px;
}
.section-tag::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--primary);box-shadow:0 0 10px var(--primary);
}
.section-title{
  font-size:32px;line-height:1.35;font-weight:800;
  margin-top:14px;color:#fff;}
.section-desc{font-size:16px;color:var(--text-dim);margin-top:14px;}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 30px;border-radius:999px;
  font-size:15px;font-weight:700;
  transition:var(--trans);border:1px solid transparent;
}
.btn:hover{transform:translateY(-2px);}
.btn:focus-visible{outline:2px solid var(--primary);outline-offset:4px;}
.btn-primary{
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  color:#0a0e17;box-shadow:0 8px 24px var(--primary-glow);
}
.btn-primary:hover{box-shadow:0 12px 34px var(--primary-glow);}
.btn-ghost{
  background:transparent;border-color:rgba(255,255,255,.2);
  color:#fff;
}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary);box-shadow:var(--shadow-glow);}
/* header */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(7,11,20,.86);
  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:inline-flex;align-items:center;gap:11px;font-size:21px;font-weight:900;letter-spacing:1px;color:#fff;}
.logo-mark{
  width:38px;height:38px;border-radius:11px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  color:#081018;font-weight:900;font-size:20px;
  box-shadow:0 0 18px var(--primary-glow);
}
.main-nav{display:flex;align-items:center;gap:30px;}
.main-nav a{
  font-size:15px;font-weight:600;
  color:var(--text-dim);padding:8px 2px;
  border-bottom:2px solid transparent;
  transition:var(--trans);
}
.main-nav a:hover{color:#fff;border-bottom-color:var(--primary);}
.main-nav a.active{
  color:var(--primary);
  border-bottom-color:var(--primary);
  text-shadow:0 0 14px var(--primary-glow);
}
.main-nav .nav-cta{
  display:inline-flex;align-items:center;
  padding:10px 20px;border-radius:999px;
  font-size:14px;font-weight:700;
  background:rgba(0,229,255,.12);
  color:var(--primary);
  border:1px solid rgba(0,229,255,.3);
  transition:var(--trans);
}
.main-nav .nav-cta:hover{
  background:var(--primary);color:#0a0e17;
  border-color:var(--primary);
  box-shadow:0 0 26px var(--primary-glow);
}
.nav-toggle{
  display:none;width:44px;height:44px;
  border-radius:12px;align-items:center;justify-content:center;
  font-size:20px;color:var(--text);
  border:1px solid var(--border);
  background:rgba(255,255,255,.03);
}
.nav-toggle:focus-visible{outline:2px solid var(--primary);}
.nav-line{
  height:1px;
  background:linear-gradient(90deg,transparent,var(--primary),transparent);
}
/* hero */
.page-hero{
  position:relative;overflow:hidden;
  padding:128px 0 116px;
  background:
    linear-gradient(rgba(7,11,20,.82),rgba(9,14,26,.94)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.page-hero::before{
  content:"";position:absolute;top:-100px;left:50%;transform:translateX(-50%);
  width:720px;height:360px;
  background:radial-gradient(ellipse,var(--primary-glow),transparent 70%);
  filter:blur(50px);pointer-events:none;
}
.hero-inner{position:relative;z-index:2;text-align:center;max-width:820px;margin:0 auto;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 22px;border-radius:999px;
  background:rgba(0,229,255,.08);
  border:1px solid rgba(0,229,255,.28);
  font-size:14px;color:var(--primary);font-weight:700;
}
.hero-title{
  font-size:48px;line-height:1.25;font-weight:900;
  color:#fff;margin-top:22px;
}
.hero-title span{
  background:linear-gradient(120deg,var(--primary),var(--secondary));
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero-sub{
  margin-top:20px;font-size:17px;
  color:var(--text-dim);line-height:1.9;
}
.hero-actions{display:flex;gap:16px;justify-content:center;margin-top:36px;flex-wrap:wrap;}
.hero-meta{
  margin-top:44px;display:flex;justify-content:center;
  gap:10px;flex-wrap:wrap;
}
.hero-meta .meta-chip{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;color:var(--text-dim);
  padding:6px 16px;border-radius:999px;
  background:rgba(255,255,255,.04);
  border:1px solid var(--border);
}
/* overview + stats */
.section-overview{background:var(--bg);}
.overview-grid{
  display:grid;grid-template-columns:1.15fr .85fr;
  gap:40px;align-items:center;
}
.overview-copy .lead{font-size:26px;font-weight:800;color:#fff;line-height:1.5;}
.overview-copy p{margin-top:16px;color:var(--text-dim);font-size:15px;}
.overview-feature-list{margin-top:26px;display:grid;gap:14px;}
.overview-feature-list li{display:flex;align-items:center;gap:12px;font-size:15px;color:var(--text);}
.overview-feature-list li i{
  width:26px;height:26px;border-radius:8px;
  display:grid;place-items:center;
  background:rgba(0,229,255,.1);
  color:var(--primary);font-size:13px;
  border:1px solid rgba(0,229,255,.2);
}
.stats-panel{
  background:var(--card-bg);
  border:1px solid var(--border);
  border-radius:20px;
  padding:40px;
  display:grid;grid-template-columns:1fr 1fr;gap:30px;
  box-shadow:var(--shadow);
  position:relative;
}
.stats-panel::before{
  content:"";position:absolute;inset:-1px;
  border-radius:20px;padding:1px;
  background:linear-gradient(135deg,var(--primary-glow),transparent 60%);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  pointer-events:none;
}
.stat-item{text-align:center;}
.stat-num{font-size:40px;font-weight:900;color:var(--primary);line-height:1.1;text-shadow:0 0 20px var(--primary-glow);}
.stat-number .stat-num{font-size:36px;}
.stat-label{margin-top:8px;font-size:14px;color:var(--text-dim);}
/* guide cards */
.section-guides{
  background:var(--bg-soft);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;}
.guide-card{
  background:var(--card-bg);
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
  transition:var(--trans);
  display:flex;flex-direction:column;
}
.guide-card:hover{
  transform:translateY(-8px);
  border-color:var(--card-border);
  box-shadow:0 14px 36px rgba(0,0,0,.5),var(--shadow-glow);
}
.guide-card-img{height:170px;overflow:hidden;position:relative;}
.guide-card-img::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 50%,rgba(7,11,20,.7));
}
.guide-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.guide-card:hover .guide-card-img img{transform:scale(1.07);}
.guide-card-body{padding:26px;display:flex;flex-direction:column;flex:1;}
.card-tag{
  align-self:flex-start;
  font-size:12px;font-weight:700;
  padding:4px 14px;border-radius:999px;
  background:rgba(0,229,255,.08);
  border:1px solid rgba(0,229,255,.2);
  color:var(--primary);
}
.guide-card-body h3{font-size:19px;font-weight:800;color:#fff;margin-top:12px;}
.guide-card-body p{margin-top:10px;font-size:14px;color:var(--text-dim);line-height:1.8;flex:1;}
.card-link{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:18px;font-size:14px;font-weight:700;color:var(--primary);
}
.card-link i{transition:transform .3s ease;}
.card-link:hover i{transform:translateX(5px);}
/* checklist */
.checklist-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.check-item{
  display:flex;gap:16px;
  background:var(--card-bg);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  padding:24px;
  transition:var(--trans);
}
.check-item:hover{border-color:var(--card-border);background:#141f38;}
.check-icon{
  width:46px;height:46px;flex-shrink:0;
  border-radius:12px;display:grid;place-items:center;
  background:rgba(0,229,255,.1);
  color:var(--primary);font-size:18px;
  border:1px solid rgba(0,229,255,.18);
}
.check-item:nth-child(2n) .check-icon{color:var(--secondary);background:rgba(157,92,255,.1);border-color:rgba(157,92,255,.2);}
.check-copy h4{font-size:16px;font-weight:800;color:#fff;}
.check-copy p{margin-top:6px;font-size:14px;color:var(--text-dim);line-height:1.75;}
/* compare cards */
.section-compare{background:var(--bg-soft);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.compare-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.compare-card{
  background:linear-gradient(180deg,var(--card-bg),#0d1830);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:32px;
  transition:var(--trans);
  position:relative;
  overflow:hidden;
}
.compare-card::before{
  content:"";position:absolute;top:0;left:0;right:0;
  height:3px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  opacity:0;transition:var(--trans);
}
.compare-card:hover{
  transform:translateY(-6px);
  border-color:var(--card-border);
  box-shadow:var(--shadow);
}
.compare-card:hover::before{opacity:1;}
.compare-card .sport-icon{
  width:56px;height:56px;border-radius:16px;
  display:grid;place-items:center;font-size:24px;
  background:rgba(0,229,255,.1);
  color:var(--primary);
  border:1px solid rgba(0,229,255,.2);
  margin-bottom:18px;
}
.compare-card h3{font-size:20px;font-weight:800;color:#fff;}
.compare-line{
  display:flex;justify-content:space-between;gap:12px;
  padding:10px 0;border-bottom:1px dashed var(--border);
  font-size:14px;
}
.compare-line:last-child{border-bottom:none;}
.compare-line .lab{color:var(--text-dim);flex-shrink:0;}
.compare-line .val{color:#fff;font-weight:600;text-align:right;}
.rec-badge{
  position:absolute;top:18px;right:18px;
  font-size:12px;font-weight:800;
  padding:4px 14px;border-radius:999px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  color:#0a0e17;
}
/* steps */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.step-item{
  text-align:center;padding:38px 22px;
  background:var(--card-bg);
  border:1px solid var(--border);
  border-radius:var(--radius);
  transition:var(--trans);
  position:relative;
}
.step-item:hover{
  transform:translateY(-6px);
  border-color:var(--card-border);
  box-shadow:0 12px 30px rgba(0,0,0,.4);
}
.step-num{
  width:52px;height:52px;margin:0 auto;
  border-radius:50%;
  display:grid;place-items:center;
  font-size:22px;font-weight:900;color:var(--primary);
  background:rgba(0,229,255,.08);
  border:1px solid rgba(0,229,255,.22);
  box-shadow:0 0 20px var(--primary-glow);
}
.step-item h4{font-size:17px;font-weight:800;color:#fff;margin-top:18px;}
.step-item p{margin-top:10px;font-size:14px;color:var(--text-dim);line-height:1.75;}
.step-line{
  display:none;
}
/* faq */
.faq-list{max-width:780px;margin:0 auto;display:grid;gap:16px;}
.faq-item{
  background:var(--card-bg);
  border:1px solid var(--border);
  border-radius:14px;
  overflow:hidden;
  transition:var(--trans);
}
.faq-item.active{border-color:var(--card-border);box-shadow:var(--shadow);}
.faq-question{
  display:flex;justify-content:space-between;align-items:center;gap:20px;
  padding:22px 26px;
  font-size:16px;font-weight:700;color:#fff;
  cursor:pointer;
}
.faq-question i{
  font-size:14px;color:var(--primary);
  transition:transform .35s ease;flex-shrink:0;
}
.faq-item.active .faq-question i{transform:rotate(180deg);}
.faq-answer{
  max-height:0;overflow:hidden;
  transition:max-height .45s ease;
}
.faq-answer p{
  padding:0 26px 24px;
  font-size:15px;color:var(--text-dim);
  line-height:1.9;border-top:1px solid var(--border);
  padding-top:18px;
}
/* cta */
.cta-box{
  text-align:center;padding:70px 48px;
  border-radius:26px;
  background:
    linear-gradient(135deg,rgba(0,229,255,.1),rgba(157,92,255,.1)),
    url('/assets/images/backpic/back-2.png') center/cover no-repeat,
    var(--card-bg);
  border:1px solid var(--card-border);
  position:relative;overflow:hidden;
}
.cta-box::before{
  content:"";position:absolute;top:-60px;left:50%;
  transform:translateX(-50%);
  width:480px;height:240px;
  background:radial-gradient(ellipse,var(--primary-glow),transparent 70%);
  filter:blur(40px);pointer-events:none;
}
.cta-box h2{font-size:32px;font-weight:900;color:#fff;position:relative;z-index:1;}
.cta-box p{margin-top:16px;font-size:16px;color:var(--text-dim);position:relative;z-index:1;}
.cta-actions{margin-top:32px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap;position:relative;z-index:1;}
/* footer */
.site-footer{background:#050910;border-top:1px solid var(--border);}
.footer-inner{max-width:var(--container);margin:0 auto;padding:64px 24px 30px;}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:44px;}
.footer-brand .logo{font-size:20px;}
.footer-brand p{margin-top:18px;font-size:14px;color:var(--text-dim);max-width:340px;line-height:1.8;}
.footer-col h4{
  font-size:16px;font-weight:800;color:#fff;
  margin-bottom:18px;
}
.footer-col a{
  display:block;padding:6px 0;
  font-size:14px;color:var(--text-dim);
}
.footer-col a:hover{color:var(--primary);transform:translateX(4px);}
.footer-bottom{
  margin-top:48px;padding-top:24px;
  border-top:1px solid var(--border);
  display:flex;justify-content:space-between;
  gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-dim);
}
.footer-bottom a{color:var(--text-dim);}
.footer-bottom a:hover{color:var(--primary);}
/* responsive */
@media (max-width:1024px){
  .card-grid,.compare-grid{grid-template-columns:repeat(2,1fr);}
  .overview-grid{grid-template-columns:1fr;gap:36px;}
  .steps-grid{grid-template-columns:repeat(2,1fr);}
  .footer-top{grid-template-columns:1fr 1fr;}
  .footer-brand{grid-column:1 / -1;}
}
@media (max-width:768px){
  .section{padding:64px 0;}
  .nav-toggle{display:flex;}
  .main-nav{
    position:fixed;top:75px;left:0;right:0;
    flex-direction:column;align-items:stretch;
    background:rgba(7,11,20,.98);
    padding:22px 24px;
    gap:14px;
    border-bottom:1px solid var(--border);
    transform:translateY(-130%);opacity:0;
    pointer-events:none;
    transition:var(--trans);
    box-shadow:0 20px 40px rgba(0,0,0,.5);
  }
  .main-nav.open{
    transform:translateY(0);opacity:1;pointer-events:auto;
  }
  .main-nav a{
    width:100%;padding:12px 4px;
    border-bottom:1px solid var(--border);
  }
  .main-nav a.active{border-bottom-color:var(--primary);}
  .main-nav .nav-cta{
    justify-content:center;margin-top:6px;
    border-bottom:none!important;
  }
  .hero-title{font-size:34px;}
  .hero-sub{font-size:15px;}
  .section-title{font-size:26px;}
  .overview-copy .lead{font-size:21px;}
  .stats-panel{padding:28px 20px;gap:20px;}
  .stat-num{font-size:32px;}
  .card-grid,.compare-grid,.checklist-grid,.steps-grid{grid-template-columns:1fr;}
  .check-item,.compare-card{padding:22px;}
  .cta-box{padding:50px 26px;}
  .cta-box h2{font-size:24px;}
  .footer-top{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;text-align:center;justify-content:center;}
  .footer-brand p{max-width:100%;}
  .page-hero{padding:90px 0 80px;}
  .footer-inner{padding-top:44px;}
}
@media (max-width:520px){
  .header-inner{height:66px;}
  .main-nav{top:67px;}
  .hero-title{font-size:28px;}
  .hero-actions .btn{width:100%;justify-content:center;}
  .card-grid{grid-template-columns:1fr;}
  .guide-card-img{height:150px;}
  .section{padding:54px 0;}
  .section-head{margin-bottom:38px;}
}