/* roulang page: index */
:root {
  --bg-primary: #0a0a1a;
  --bg-secondary: #0f0f2e;
  --bg-card: #15153a;
  --bg-card-hover: #1c1c4a;
  --bg-nav: rgba(10, 10, 26, 0.95);
  --text-primary: #f0f0ff;
  --text-secondary: #a0a0d0;
  --text-muted: #6a6a9a;
  --accent-purple: #7c3aed;
  --accent-purple-light: #a855f7;
  --accent-cyan: #06b6d4;
  --accent-cyan-light: #22d3ee;
  --accent-pink: #ec4899;
  --border-color: rgba(124, 58, 237, 0.25);
  --border-light: rgba(255, 255, 255, 0.06);
  --shadow-glow: 0 0 30px rgba(124, 58, 237, 0.25);
  --shadow-glow-cyan: 0 0 30px rgba(6, 182, 212, 0.25);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --radius: 14px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --max-width: 1200px;
  --nav-height: 72px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-sans);background:var(--bg-primary);color:var(--text-primary);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--accent-cyan-light);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--accent-purple-light)}
img{max-width:100%;height:auto;display:block}
button{cursor:pointer;font-family:inherit;border:none;background:none;color:inherit}
input,textarea{font-family:inherit;border:none;outline:none}
ul,ol{list-style:none}
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}
@media(max-width:768px){.container{padding:0 16px}}
.section{padding:80px 0}
@media(max-width:768px){.section{padding:48px 0}}
.section-title{font-size:2.2rem;font-weight:800;text-align:center;margin-bottom:12px;background:linear-gradient(135deg,var(--accent-purple-light),var(--accent-cyan-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.section-subtitle{text-align:center;color:var(--text-secondary);font-size:1.1rem;max-width:640px;margin:0 auto 48px;line-height:1.6}
@media(max-width:768px){.section-title{font-size:1.6rem}.section-subtitle{font-size:0.95rem;margin-bottom:32px}}
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 32px;border-radius:50px;font-size:1rem;font-weight:600;transition:all var(--transition);position:relative;overflow:hidden}
.btn-primary{background:linear-gradient(135deg,var(--accent-purple),var(--accent-cyan));color:#fff;box-shadow:0 4px 20px rgba(124,58,237,0.35)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 8px 35px rgba(124,58,237,0.5);color:#fff}
.btn-outline{border:2px solid var(--accent-purple);color:var(--accent-purple-light);background:transparent}
.btn-outline:hover{background:var(--accent-purple);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-glow)}
.btn-lg{padding:18px 44px;font-size:1.15rem}
@media(max-width:768px){.btn{padding:12px 24px;font-size:0.9rem}.btn-lg{padding:14px 32px;font-size:1rem}}

/* ===== Navigation ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:1000;background:var(--bg-nav);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border-light);height:var(--nav-height)}
.nav{display:flex;align-items:center;justify-content:space-between;height:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}
.logo{font-size:1.4rem;font-weight:800;background:linear-gradient(135deg,var(--accent-purple-light),var(--accent-cyan-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;white-space:nowrap;letter-spacing:0.5px}
.logo i{margin-right:8px;-webkit-text-fill-color:initial;color:var(--accent-cyan)}
.nav-links{display:flex;align-items:center;gap:40px}
.nav-links a{color:var(--text-secondary);font-size:0.95rem;font-weight:500;padding:8px 0;position:relative;transition:color var(--transition)}
.nav-links a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:2px;background:linear-gradient(90deg,var(--accent-purple),var(--accent-cyan));transition:width var(--transition);border-radius:2px}
.nav-links a:hover{color:var(--text-primary)}
.nav-links a:hover::after{width:100%}
.nav-links a.active{color:var(--accent-cyan-light)}
.nav-links a.active::after{width:100%;box-shadow:0 0 12px rgba(6,182,212,0.5)}
.nav-cta{background:linear-gradient(135deg,var(--accent-purple),var(--accent-cyan));color:#fff;padding:10px 24px;border-radius:50px;font-size:0.9rem;font-weight:600;transition:all var(--transition);box-shadow:0 4px 16px rgba(124,58,237,0.3)}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(124,58,237,0.5);color:#fff}
.menu-toggle{display:none;font-size:1.5rem;color:var(--text-primary);padding:8px;border-radius:var(--radius-sm);transition:background var(--transition)}
.menu-toggle:hover{background:rgba(255,255,255,0.05)}
@media(max-width:768px){
  .menu-toggle{display:block}
  .nav-links{position:fixed;top:var(--nav-height);left:0;right:0;background:var(--bg-nav);backdrop-filter:blur(20px);flex-direction:column;padding:24px 32px;gap:20px;transform:translateY(-120%);opacity:0;transition:all 0.4s cubic-bezier(0.4,0,0.2,1);border-bottom:1px solid var(--border-light);pointer-events:none;align-items:stretch}
  .nav-links.open{transform:translateY(0);opacity:1;pointer-events:all}
  .nav-links a{padding:12px 0;font-size:1.1rem}
  .nav-cta{display:none}
  .nav .nav-cta-mobile{display:block;text-align:center;margin-top:8px;background:linear-gradient(135deg,var(--accent-purple),var(--accent-cyan));color:#fff;padding:12px;border-radius:50px;font-weight:600}
}
@media(min-width:769px){.nav .nav-cta-mobile{display:none}}

/* ===== Hero ===== */
.hero{min-height:100vh;display:flex;align-items:center;position:relative;overflow:hidden;padding-top:var(--nav-height)}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center center/cover no-repeat;z-index:0}
.hero-bg::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(10,10,26,0.92),rgba(15,15,46,0.85),rgba(10,10,26,0.95));z-index:1}
.hero-glow{position:absolute;top:-20%;right:-10%;width:600px;height:600px;background:radial-gradient(circle,rgba(124,58,237,0.15),transparent 70%);z-index:1;pointer-events:none}
.hero-glow-2{position:absolute;bottom:-10%;left:-10%;width:500px;height:500px;background:radial-gradient(circle,rgba(6,182,212,0.1),transparent 70%);z-index:1;pointer-events:none}
.hero-content{position:relative;z-index:2;max-width:800px;padding:60px 0}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(124,58,237,0.15);border:1px solid rgba(124,58,237,0.25);border-radius:50px;padding:6px 20px;font-size:0.85rem;color:var(--accent-purple-light);margin-bottom:24px;backdrop-filter:blur(8px)}
.hero-badge i{color:var(--accent-cyan)}
.hero h1{font-size:3.6rem;font-weight:900;line-height:1.15;margin-bottom:20px;letter-spacing:-0.5px}
.hero h1 .highlight{background:linear-gradient(135deg,var(--accent-purple-light),var(--accent-cyan-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:1.2rem;color:var(--text-secondary);max-width:600px;margin-bottom:36px;line-height:1.7}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{display:flex;gap:40px;margin-top:48px;padding-top:32px;border-top:1px solid var(--border-light)}
.hero-stat h3{font-size:1.8rem;font-weight:800;background:linear-gradient(135deg,var(--accent-purple-light),var(--accent-cyan-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-stat p{font-size:0.85rem;color:var(--text-muted);margin-bottom:0}
@media(max-width:1024px){.hero h1{font-size:2.8rem}}
@media(max-width:768px){
  .hero h1{font-size:2rem;letter-spacing:0}
  .hero p{font-size:1rem}
  .hero-stats{gap:24px;flex-wrap:wrap}
  .hero-stat h3{font-size:1.4rem}
  .hero-content{padding:40px 0}
}

/* ===== Features ===== */
.features{background:var(--bg-secondary)}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.feature-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius);padding:40px 32px;transition:all var(--transition);position:relative;overflow:hidden}
.feature-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent-purple),var(--accent-cyan));opacity:0;transition:opacity var(--transition)}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-card),var(--shadow-glow);border-color:rgba(124,58,237,0.4)}
.feature-card:hover::before{opacity:1}
.feature-icon{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.6rem;margin-bottom:20px;background:linear-gradient(135deg,rgba(124,58,237,0.15),rgba(6,182,212,0.1));border:1px solid var(--border-color);color:var(--accent-cyan-light)}
.feature-card h3{font-size:1.25rem;font-weight:700;margin-bottom:10px;color:var(--text-primary)}
.feature-card p{color:var(--text-secondary);font-size:0.95rem;line-height:1.6;margin-bottom:0}
@media(max-width:1024px){.features-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.features-grid{grid-template-columns:1fr}.feature-card{padding:28px 24px}}

/* ===== Categories ===== */
.categories-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.cat-card{position:relative;border-radius:var(--radius);overflow:hidden;background:var(--bg-card);border:1px solid var(--border-color);transition:all var(--transition);min-height:320px;display:flex;flex-direction:column}
.cat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-card),var(--shadow-glow);border-color:rgba(124,58,237,0.4)}
.cat-card-img{height:180px;overflow:hidden;position:relative}
.cat-card-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.5s ease}
.cat-card:hover .cat-card-img img{transform:scale(1.08)}
.cat-card-body{padding:20px 24px 24px;flex:1;display:flex;flex-direction:column}
.cat-card-body h3{font-size:1.15rem;font-weight:700;margin-bottom:6px;color:var(--text-primary)}
.cat-card-body p{font-size:0.9rem;color:var(--text-secondary);line-height:1.5;flex:1;margin-bottom:12px}
.cat-tag{display:inline-flex;align-items:center;gap:6px;background:rgba(124,58,237,0.12);color:var(--accent-purple-light);padding:4px 14px;border-radius:50px;font-size:0.8rem;font-weight:500;align-self:flex-start}
@media(max-width:1024px){.categories-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.categories-grid{grid-template-columns:1fr}.cat-card{min-height:280px}}

/* ===== Latest Posts ===== */
.latest-news{background:var(--bg-secondary)}
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.news-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius);padding:28px 28px;transition:all var(--transition);display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card);border-color:rgba(124,58,237,0.35)}
.news-meta{display:flex;align-items:center;gap:14px;font-size:0.8rem;color:var(--text-muted);margin-bottom:12px;flex-wrap:wrap}
.news-cat{background:rgba(6,182,212,0.12);color:var(--accent-cyan-light);padding:2px 12px;border-radius:50px;font-weight:500;font-size:0.75rem}
.news-card h3{font-size:1.1rem;font-weight:700;margin-bottom:8px;line-height:1.4;color:var(--text-primary)}
.news-card h3 a{color:inherit;transition:color var(--transition)}
.news-card h3 a:hover{color:var(--accent-cyan-light)}
.news-card p{font-size:0.9rem;color:var(--text-secondary);line-height:1.5;flex:1;margin-bottom:0}
.news-empty{grid-column:1/-1;text-align:center;padding:40px;color:var(--text-muted);font-size:1.05rem;background:var(--bg-card);border-radius:var(--radius);border:1px dashed var(--border-color)}
@media(max-width:768px){.news-grid{grid-template-columns:1fr}.news-card{padding:20px}}

/* ===== Process / Steps ===== */
.process{background:var(--bg-primary)}
.process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;counter-reset:step}
.process-step{text-align:center;position:relative;padding:32px 20px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius);transition:all var(--transition)}
.process-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-card);border-color:rgba(124,58,237,0.3)}
.process-step::before{counter-increment:step;content:counter(step);position:absolute;top:-14px;left:50%;transform:translateX(-50%);width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--accent-purple),var(--accent-cyan));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:0.9rem;box-shadow:0 0 20px rgba(124,58,237,0.3)}
.process-step .step-icon{font-size:2rem;color:var(--accent-cyan-light);margin-bottom:16px;margin-top:8px}
.process-step h3{font-size:1.1rem;font-weight:700;margin-bottom:6px;color:var(--text-primary)}
.process-step p{font-size:0.85rem;color:var(--text-secondary);line-height:1.5;margin-bottom:0}
@media(max-width:1024px){.process-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.process-grid{grid-template-columns:1fr}}

/* ===== FAQ ===== */
.faq{background:var(--bg-secondary)}
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-sm);overflow:hidden;transition:border-color var(--transition)}
.faq-item.active{border-color:rgba(124,58,237,0.4)}
.faq-question{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;cursor:pointer;font-size:1rem;font-weight:600;color:var(--text-primary);transition:color var(--transition);gap:16px;width:100%;text-align:left;background:none;border:none;font-family:inherit}
.faq-question:hover{color:var(--accent-cyan-light)}
.faq-question i{color:var(--accent-purple-light);transition:transform var(--transition);font-size:0.85rem;flex-shrink:0}
.faq-item.active .faq-question i{transform:rotate(180deg);color:var(--accent-cyan)}
.faq-answer{padding:0 24px 18px;color:var(--text-secondary);font-size:0.92rem;line-height:1.7;display:none}
.faq-item.active .faq-answer{display:block}

/* ===== CTA ===== */
.cta{background:var(--bg-primary);position:relative;overflow:hidden}
.cta::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-2.png') center center/cover no-repeat;opacity:0.08;z-index:0}
.cta-content{position:relative;z-index:1;text-align:center;padding:60px 0;max-width:700px;margin:0 auto}
.cta h2{font-size:2.2rem;font-weight:800;margin-bottom:16px;background:linear-gradient(135deg,var(--accent-purple-light),var(--accent-cyan-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.cta p{font-size:1.1rem;color:var(--text-secondary);margin-bottom:32px;line-height:1.6}
.cta .btn{margin:0 auto}
@media(max-width:768px){.cta h2{font-size:1.6rem}.cta p{font-size:0.95rem}}

/* ===== Footer ===== */
.footer{background:var(--bg-secondary);border-top:1px solid var(--border-light);padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:32px}
.footer-brand .logo{font-size:1.3rem;margin-bottom:12px;display:inline-block}
.footer-brand p{color:var(--text-muted);font-size:0.9rem;line-height:1.6;max-width:320px}
.footer-col h4{font-size:0.95rem;font-weight:700;color:var(--text-primary);margin-bottom:16px;text-transform:uppercase;letter-spacing:0.5px}
.footer-col a{display:block;color:var(--text-muted);font-size:0.88rem;padding:5px 0;transition:color var(--transition)}
.footer-col a:hover{color:var(--accent-cyan-light)}
.footer-bottom{border-top:1px solid var(--border-light);padding-top:20px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-bottom p{color:var(--text-muted);font-size:0.82rem}
.footer-socials{display:flex;gap:12px}
.footer-socials a{width:36px;height:36px;border-radius:50%;background:rgba(255,255,255,0.04);border:1px solid var(--border-light);display:flex;align-items:center;justify-content:center;color:var(--text-muted);transition:all var(--transition);font-size:0.9rem}
.footer-socials a:hover{background:var(--accent-purple);color:#fff;border-color:var(--accent-purple);transform:translateY(-2px)}
@media(max-width:768px){.footer-grid{grid-template-columns:1fr;gap:32px}.footer-bottom{flex-direction:column;text-align:center}}

/* ===== Utilities ===== */
.text-gradient{background:linear-gradient(135deg,var(--accent-purple-light),var(--accent-cyan-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.glow-border{position:relative}
.glow-border::after{content:'';position:absolute;inset:0;border-radius:inherit;padding:1px;background:linear-gradient(135deg,var(--accent-purple),var(--accent-cyan));-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0.4;pointer-events:none}

/* ===== Scrollbar ===== */
::-webkit-scrollbar{width:8px}
::-webkit-scrollbar-track{background:var(--bg-primary)}
::-webkit-scrollbar-thumb{background:var(--accent-purple);border-radius:4px}
::-webkit-scrollbar-thumb:hover{background:var(--accent-purple-light)}

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --clr-primary: #f5a623;
            --clr-primary-light: #ffc85a;
            --clr-primary-dark: #d4891a;
            --clr-accent: #ff6b35;
            --clr-accent-light: #ff8f5e;
            --clr-bg: #0b0e17;
            --clr-bg-alt: #111827;
            --clr-bg-card: #1a1f2e;
            --clr-bg-card-hover: #222a3d;
            --clr-surface: #1e2538;
            --clr-text: #f1f3f6;
            --clr-text-secondary: #a0aec0;
            --clr-text-muted: #6b7a8f;
            --clr-border: #2a3348;
            --clr-border-light: #3a4560;
            --clr-glow: rgba(245, 166, 35, 0.2);
            --clr-glow-strong: rgba(245, 166, 35, 0.4);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.4), 0 0 30px rgba(245, 166, 35, 0.05);
            --shadow-glow: 0 0 30px rgba(245, 166, 35, 0.15);
            --shadow-btn: 0 4px 16px rgba(245, 166, 35, 0.25);
            --shadow-btn-hover: 0 6px 28px rgba(245, 166, 35, 0.4);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }

        body {
            font-family: var(--font-sans);
            background: var(--clr-bg);
            color: var(--clr-text);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
        }

        a {
            color: var(--clr-primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--clr-primary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--clr-primary);
            outline-offset: 4px;
            border-radius: var(--radius-sm);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        button,
        input,
        textarea {
            font-family: var(--font-sans);
            font-size: 1rem;
            border: none;
            outline: none;
            background: none;
            color: var(--clr-text);
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Header / 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(11, 14, 23, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--clr-border);
            box-shadow: 0 2px 30px rgba(0, 0, 0, 0.5);
        }

        .nav {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--clr-text);
            letter-spacing: 0.5px;
            transition: color var(--transition);
        }
        .logo i {
            color: var(--clr-primary);
            font-size: 1.5rem;
            filter: drop-shadow(0 0 8px var(--clr-glow-strong));
        }
        .logo:hover {
            color: var(--clr-primary-light);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links li a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--clr-text-secondary);
            transition: all var(--transition);
            position: relative;
        }
        .nav-links li a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--clr-primary);
            border-radius: 2px;
            box-shadow: 0 0 12px var(--clr-glow-strong);
            transition: transform var(--transition);
        }
        .nav-links li a:hover {
            color: var(--clr-text);
            background: rgba(245, 166, 35, 0.08);
        }
        .nav-links li a:hover::after {
            transform: translateX(-50%) scaleX(1);
        }
        .nav-links li a.active {
            color: var(--clr-primary);
            background: rgba(245, 166, 35, 0.1);
        }
        .nav-links li a.active::after {
            transform: translateX(-50%) scaleX(1);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            color: #0b0e17;
            font-weight: 600;
            font-size: 0.95rem;
            box-shadow: var(--shadow-btn);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-cta i {
            font-size: 1rem;
        }
        .nav-cta:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: var(--shadow-btn-hover);
            color: #0b0e17;
        }
        .nav-cta:active {
            transform: translateY(0) scale(0.98);
        }

        .nav-cta-mobile {
            display: none;
        }

        .menu-toggle {
            display: none;
            font-size: 1.6rem;
            color: var(--clr-text);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: rgba(245, 166, 35, 0.1);
        }

        /* ===== 移动端导航 ===== */
        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(11, 14, 23, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px 30px;
                gap: 6px;
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                border-bottom: 1px solid var(--clr-border);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links li a {
                display: block;
                padding: 14px 20px;
                font-size: 1.05rem;
                border-radius: var(--radius-sm);
                width: 100%;
                text-align: center;
            }
            .nav-links li a::after {
                display: none;
            }
            .nav-links li a.active {
                background: rgba(245, 166, 35, 0.15);
            }
            .nav-cta {
                display: none;
            }
            .nav-cta-mobile {
                display: block;
                margin-top: 12px;
                padding: 14px 24px;
                border-radius: var(--radius-md);
                background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
                color: #0b0e17;
                font-weight: 700;
                font-size: 1.05rem;
                text-align: center;
                box-shadow: var(--shadow-btn);
                transition: all var(--transition);
            }
            .nav-cta-mobile:hover {
                transform: translateY(-2px);
                box-shadow: var(--shadow-btn-hover);
                color: #0b0e17;
            }
            .menu-toggle {
                display: block;
            }
        }

        @media (max-width: 520px) {
            .logo {
                font-size: 1.1rem;
                gap: 6px;
            }
            .logo i {
                font-size: 1.2rem;
            }
            .nav {
                padding: 0 16px;
            }
        }

        /* ===== 页面主体 ===== */
        .main {
            padding-top: var(--header-height);
            min-height: 80vh;
        }

        /* ===== 文章 Banner ===== */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            border-bottom: 1px solid var(--clr-border);
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 14, 23, 0.85) 0%, rgba(11, 14, 23, 0.6) 50%, rgba(11, 14, 23, 0.9) 100%);
            z-index: 1;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
        }
        .article-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--clr-text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .article-banner .breadcrumb a {
            color: var(--clr-text-muted);
        }
        .article-banner .breadcrumb a:hover {
            color: var(--clr-primary);
        }
        .article-banner .breadcrumb .sep {
            color: var(--clr-border-light);
        }
        .article-banner .breadcrumb .current {
            color: var(--clr-primary);
        }
        .article-banner .category-tag {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 20px;
            background: rgba(245, 166, 35, 0.15);
            color: var(--clr-primary);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 16px;
            border: 1px solid rgba(245, 166, 35, 0.2);
        }
        .article-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--clr-text);
            max-width: 900px;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .article-banner .meta {
            display: flex;
            align-items: center;
            gap: 24px;
            margin-top: 20px;
            color: var(--clr-text-secondary);
            font-size: 0.95rem;
            flex-wrap: wrap;
        }
        .article-banner .meta i {
            margin-right: 6px;
            color: var(--clr-primary);
        }
        .article-banner .meta span {
            display: flex;
            align-items: center;
        }

        @media (max-width: 768px) {
            .article-banner {
                padding: 60px 0 40px;
            }
            .article-banner h1 {
                font-size: 1.8rem;
            }
            .article-banner .meta {
                gap: 14px;
                font-size: 0.85rem;
            }
        }
        @media (max-width: 520px) {
            .article-banner h1 {
                font-size: 1.5rem;
            }
            .article-banner {
                padding: 50px 0 30px;
            }
        }

        /* ===== 文章正文区域 ===== */
        .article-body {
            padding: 60px 0 80px;
            background: var(--clr-bg);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .article-content {
            background: var(--clr-bg-card);
            border-radius: var(--radius-lg);
            padding: 48px 48px 56px;
            border: 1px solid var(--clr-border);
            box-shadow: var(--shadow-card);
        }
        .article-content .content-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--clr-text);
        }
        .article-content .content-body p {
            margin-bottom: 1.4em;
        }
        .article-content .content-body h2,
        .article-content .content-body h3 {
            margin-top: 1.8em;
            margin-bottom: 0.6em;
            color: var(--clr-text);
            font-weight: 700;
        }
        .article-content .content-body h2 {
            font-size: 1.6rem;
            border-bottom: 2px solid var(--clr-border);
            padding-bottom: 10px;
        }
        .article-content .content-body h3 {
            font-size: 1.25rem;
        }
        .article-content .content-body ul,
        .article-content .content-body ol {
            margin-bottom: 1.4em;
            padding-left: 1.8em;
        }
        .article-content .content-body ul {
            list-style: disc;
        }
        .article-content .content-body ol {
            list-style: decimal;
        }
        .article-content .content-body li {
            margin-bottom: 0.4em;
        }
        .article-content .content-body a {
            color: var(--clr-primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content .content-body a:hover {
            color: var(--clr-primary-light);
        }
        .article-content .content-body img {
            border-radius: var(--radius-md);
            margin: 1.5em 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .article-content .content-body blockquote {
            border-left: 4px solid var(--clr-primary);
            background: rgba(245, 166, 35, 0.06);
            padding: 16px 24px;
            margin: 1.5em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--clr-text-secondary);
            font-style: italic;
        }
        .article-content .content-body code {
            background: rgba(245, 166, 35, 0.1);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--clr-primary-light);
        }
        .article-content .content-body pre {
            background: var(--clr-surface);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            overflow-x: auto;
            margin: 1.5em 0;
        }
        .article-content .content-body pre code {
            background: none;
            padding: 0;
            color: var(--clr-text-secondary);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            background: var(--clr-bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--clr-border);
        }
        .article-not-found i {
            font-size: 4rem;
            color: var(--clr-text-muted);
            margin-bottom: 24px;
        }
        .article-not-found h2 {
            font-size: 1.8rem;
            margin-bottom: 16px;
            color: var(--clr-text);
        }
        .article-not-found p {
            color: var(--clr-text-secondary);
            margin-bottom: 24px;
        }
        .article-not-found .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            color: #0b0e17;
            font-weight: 600;
            box-shadow: var(--shadow-btn);
            transition: all var(--transition);
        }
        .article-not-found .btn-back:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-btn-hover);
            color: #0b0e17;
        }

        /* ===== 侧边栏 ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--clr-bg-card);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--clr-border);
            box-shadow: var(--shadow-card);
        }
        .sidebar-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--clr-text);
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--clr-border);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-card h3 i {
            color: var(--clr-primary);
        }
        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            background: rgba(245, 166, 35, 0.03);
            border: 1px solid transparent;
            transition: all var(--transition);
            color: var(--clr-text-secondary);
        }
        .sidebar-list a:hover {
            background: rgba(245, 166, 35, 0.08);
            border-color: rgba(245, 166, 35, 0.15);
            color: var(--clr-text);
        }
        .sidebar-list a .num {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(245, 166, 35, 0.12);
            color: var(--clr-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .sidebar-list a .text {
            flex: 1;
            font-size: 0.92rem;
            line-height: 1.4;
        }
        .sidebar-list a .text .date {
            display: block;
            font-size: 0.78rem;
            color: var(--clr-text-muted);
            margin-top: 2px;
        }

        .sidebar-cta {
            background: linear-gradient(145deg, rgba(245, 166, 35, 0.08), rgba(255, 107, 53, 0.05));
            border: 1px solid rgba(245, 166, 35, 0.2);
            text-align: center;
        }
        .sidebar-cta h3 {
            border-bottom: none;
            padding-bottom: 0;
            justify-content: center;
        }
        .sidebar-cta p {
            color: var(--clr-text-secondary);
            font-size: 0.92rem;
            margin-bottom: 20px;
        }
        .sidebar-cta .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
            color: #0b0e17;
            font-weight: 600;
            box-shadow: var(--shadow-btn);
            transition: all var(--transition);
        }
        .sidebar-cta .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-btn-hover);
            color: #0b0e17;
        }

        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr 280px;
                gap: 32px;
            }
            .article-content {
                padding: 32px 28px 40px;
            }
        }
        @media (max-width: 768px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .article-content {
                padding: 28px 20px 36px;
            }
            .article-content .content-body {
                font-size: 1rem;
            }
            .sidebar-card {
                padding: 22px 18px;
            }
        }
        @media (max-width: 520px) {
            .article-content {
                padding: 20px 16px 28px;
                border-radius: var(--radius-md);
            }
            .article-content .content-body h2 {
                font-size: 1.3rem;
            }
            .article-content .content-body h3 {
                font-size: 1.1rem;
            }
        }

        /* ===== 上一篇 / 下一篇 ===== */
        .article-nav {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--clr-border);
        }
        .article-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 20px;
            border-radius: var(--radius-md);
            background: var(--clr-bg-alt);
            border: 1px solid var(--clr-border);
            color: var(--clr-text-secondary);
            transition: all var(--transition);
            flex: 1;
            max-width: 48%;
        }
        .article-nav a:hover {
            border-color: var(--clr-primary);
            color: var(--clr-text);
            background: rgba(245, 166, 35, 0.06);
        }
        .article-nav a .dir {
            font-size: 0.8rem;
            color: var(--clr-text-muted);
            display: block;
            margin-bottom: 2px;
        }
        .article-nav a .title {
            font-size: 0.95rem;
            font-weight: 600;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-nav .next {
            text-align: right;
            flex-direction: row-reverse;
        }

        @media (max-width: 520px) {
            .article-nav {
                flex-direction: column;
            }
            .article-nav a {
                max-width: 100%;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--clr-bg-alt);
            border-top: 1px solid var(--clr-border);
            padding: 60px 0 30px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--clr-border);
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            margin-bottom: 16px;
        }
        .footer-brand p {
            color: var(--clr-text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            color: var(--clr-text);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            color: var(--clr-text-secondary);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--clr-primary);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom p {
            color: var(--clr-text-muted);
            font-size: 0.85rem;
        }
        .footer-socials {
            display: flex;
            gap: 14px;
        }
        .footer-socials a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--clr-text-secondary);
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .footer-socials a:hover {
            background: var(--clr-primary);
            color: #0b0e17;
            border-color: var(--clr-primary);
            transform: translateY(-3px);
            box-shadow: 0 6px 20px var(--clr-glow);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .footer {
                padding: 40px 0 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-col a {
                padding: 4px 0;
            }
        }

        /* ===== 通用工具 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-12 {
            gap: 12px;
        }

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--clr-bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--clr-border-light);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--clr-text-muted);
        }

        /* ===== 选中高亮 ===== */
        ::selection {
            background: rgba(245, 166, 35, 0.3);
            color: var(--clr-text);
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #00e5ff;
            --primary-dim: #0097a7;
            --primary-glow: rgba(0, 229, 255, 0.25);
            --accent: #ff2d78;
            --accent-glow: rgba(255, 45, 120, 0.30);
            --bg-dark: #0b0d17;
            --bg-card: #13172b;
            --bg-elevated: #1a1f3a;
            --bg-input: #0f1325;
            --text-main: #edf2ff;
            --text-weak: #8a93b8;
            --text-inverse: #0b0d17;
            --border-dim: rgba(0, 229, 255, 0.12);
            --border-glow: rgba(0, 229, 255, 0.30);
            --radius: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.60), 0 0 0 1px rgba(0, 229, 255, 0.06);
            --shadow-glow: 0 0 30px rgba(0, 229, 255, 0.10);
            --transition: 0.30s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg-dark);
            min-height: 100vh;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: #80f0ff;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: 1rem;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-main);
        }

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

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(11, 13, 23, 0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-dim);
            box-shadow: 0 2px 40px rgba(0, 0, 0, 0.40);
            height: var(--nav-height);
            transition: background var(--transition);
        }

        .nav {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.3px;
            white-space: nowrap;
            transition: opacity var(--transition);
        }
        .logo i {
            color: var(--primary);
            font-size: 1.5rem;
            filter: drop-shadow(0 0 8px var(--primary-glow));
        }
        .logo:hover {
            opacity: 0.85;
            color: var(--text-main);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links li a {
            padding: 8px 18px;
            border-radius: 40px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-weak);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-links li a:hover {
            color: var(--text-main);
            background: rgba(0, 229, 255, 0.06);
        }
        .nav-links li a.active {
            color: var(--primary);
            background: rgba(0, 229, 255, 0.10);
            box-shadow: inset 0 0 0 1px var(--border-glow), 0 0 20px var(--primary-glow);
        }
        .nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 4px;
            box-shadow: 0 0 12px var(--primary-glow);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 26px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 0.95rem;
            color: #0b0d17;
            background: linear-gradient(135deg, var(--primary), #00bcd4);
            box-shadow: 0 4px 20px rgba(0, 229, 255, 0.30);
            transition: all var(--transition);
            white-space: nowrap;
            border: none;
        }
        .nav-cta:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 32px rgba(0, 229, 255, 0.45);
            color: #0b0d17;
        }
        .nav-cta:active {
            transform: translateY(0) scale(0.97);
        }

        .nav-cta-mobile {
            display: none !important;
        }

        .menu-toggle {
            display: none;
            background: none;
            color: var(--text-main);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: rgba(0, 229, 255, 0.08);
        }

        /* ===== 移动端导航 ===== */
        @media (max-width: 820px) {
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                width: 100%;
                flex-direction: column;
                background: rgba(11, 13, 23, 0.98);
                backdrop-filter: blur(20px);
                padding: 20px 24px 28px;
                gap: 6px;
                border-bottom: 1px solid var(--border-dim);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.40s cubic-bezier(0.22, 1, 0.36, 1);
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.60);
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links li a {
                padding: 12px 20px;
                font-size: 1.05rem;
                width: 100%;
                border-radius: 10px;
            }
            .nav-links li a.active::after {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .nav-cta-mobile {
                display: flex !important;
                align-items: center;
                justify-content: center;
                gap: 8px;
                padding: 12px 20px;
                border-radius: 40px;
                font-weight: 700;
                font-size: 1rem;
                color: #0b0d17;
                background: linear-gradient(135deg, var(--primary), #00bcd4);
                box-shadow: 0 4px 20px rgba(0, 229, 255, 0.30);
                margin-top: 8px;
                border: none;
                width: 100%;
                transition: all var(--transition);
            }
            .nav-cta-mobile:hover {
                transform: translateY(-2px);
                box-shadow: 0 8px 32px rgba(0, 229, 255, 0.45);
                color: #0b0d17;
            }
            .menu-toggle {
                display: block;
            }
        }

        @media (max-width: 480px) {
            .nav {
                padding: 0 16px;
            }
            .logo {
                font-size: 1.1rem;
                gap: 6px;
            }
            .logo i {
                font-size: 1.2rem;
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
            background: linear-gradient(135deg, var(--text-main) 40%, var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-sub {
            text-align: center;
            color: var(--text-weak);
            font-size: 1.1rem;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }
        .section-sub strong {
            color: var(--primary);
            font-weight: 600;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .section-sub {
                font-size: 1rem;
                margin-bottom: 32px;
                padding: 0 12px;
            }
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            padding: 140px 0 80px;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            position: relative;
            isolation: isolate;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 13, 23, 0.88) 30%, rgba(0, 229, 255, 0.18) 100%);
            z-index: 0;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 80%, rgba(0, 229, 255, 0.08) 0%, transparent 70%);
            z-index: 0;
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            border-radius: 40px;
            background: rgba(0, 229, 255, 0.10);
            border: 1px solid var(--border-glow);
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--primary);
            margin-bottom: 20px;
            letter-spacing: 0.3px;
            box-shadow: 0 0 20px var(--primary-glow);
        }
        .page-hero .hero-badge i {
            font-size: 0.75rem;
        }
        .page-hero h1 {
            font-size: 3.4rem;
            font-weight: 900;
            letter-spacing: -1px;
            line-height: 1.15;
            margin-bottom: 16px;
        }
        .page-hero h1 span {
            background: linear-gradient(135deg, var(--primary), #80f0ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-hero p {
            font-size: 1.2rem;
            color: var(--text-weak);
            max-width: 580px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .page-hero .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .page-hero .hero-actions .btn-primary {
            padding: 14px 40px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1.05rem;
            color: #0b0d17;
            background: linear-gradient(135deg, var(--primary), #00bcd4);
            box-shadow: 0 4px 28px rgba(0, 229, 255, 0.35);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            border: none;
        }
        .page-hero .hero-actions .btn-primary:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 12px 40px rgba(0, 229, 255, 0.50);
        }
        .page-hero .hero-actions .btn-secondary {
            padding: 14px 36px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-dim);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .page-hero .hero-actions .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--border-glow);
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .page-hero {
                padding: 120px 0 56px;
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .page-hero .hero-actions .btn-primary,
            .page-hero .hero-actions .btn-secondary {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }
        @media (max-width: 480px) {
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .page-hero .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .page-hero .hero-actions .btn-primary,
            .page-hero .hero-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            gap: 28px;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
        }
        .card-grid.cols-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .card-grid.cols-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        @media (max-width: 1024px) {
            .card-grid.cols-3,
            .card-grid.cols-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .card-grid {
                grid-template-columns: 1fr !important;
                gap: 20px;
            }
        }

        /* ===== 卡片组件 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--border-dim);
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
            opacity: 0;
            transition: opacity var(--transition);
        }
        .card:hover {
            transform: translateY(-6px);
            border-color: var(--border-glow);
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.70), 0 0 0 1px rgba(0, 229, 255, 0.12);
        }
        .card:hover::before {
            opacity: 1;
        }

        .card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            background: rgba(0, 229, 255, 0.08);
            margin-bottom: 16px;
            border: 1px solid var(--border-dim);
            transition: all var(--transition);
        }
        .card:hover .card-icon {
            background: rgba(0, 229, 255, 0.16);
            border-color: var(--border-glow);
            box-shadow: 0 0 24px var(--primary-glow);
        }
        .card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .card p {
            color: var(--text-weak);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .card .card-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(0, 229, 255, 0.08);
            border: 1px solid var(--border-dim);
            margin-top: 12px;
            letter-spacing: 0.3px;
        }

        /* ===== 流程步骤 ===== */
        .steps {
            display: grid;
            gap: 32px;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: 24px 16px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-dim);
            transition: all var(--transition);
            position: relative;
        }
        .step-item:hover {
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.50);
        }
        .step-item .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 800;
            color: #0b0d17;
            background: linear-gradient(135deg, var(--primary), #00bcd4);
            margin: 0 auto 16px;
            box-shadow: 0 0 24px var(--primary-glow);
        }
        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .step-item p {
            color: var(--text-weak);
            font-size: 0.9rem;
            line-height: 1.5;
        }
        .step-item .step-arrow {
            display: none;
        }

        @media (min-width: 768px) {
            .steps {
                grid-template-columns: repeat(4, 1fr);
                position: relative;
            }
            .step-item:not(:last-child)::after {
                content: '→';
                position: absolute;
                right: -22px;
                top: 50%;
                transform: translateY(-50%);
                font-size: 1.6rem;
                color: var(--primary);
                opacity: 0.40;
                font-weight: 300;
                pointer-events: none;
            }
        }
        @media (max-width: 767px) {
            .steps {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .step-item {
                display: flex;
                align-items: flex-start;
                text-align: left;
                gap: 16px;
                padding: 20px;
            }
            .step-item .step-num {
                margin: 0 0 0 0;
                flex-shrink: 0;
                width: 40px;
                height: 40px;
                font-size: 1.1rem;
            }
            .step-item h4 {
                margin-bottom: 2px;
            }
        }

        /* ===== 特色列表 ===== */
        .feature-list {
            display: grid;
            gap: 24px;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        }
        .feature-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            padding: 20px 22px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-dim);
            transition: all var(--transition);
        }
        .feature-item:hover {
            border-color: var(--border-glow);
            transform: translateX(4px);
        }
        .feature-item .fi-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--primary);
            background: rgba(0, 229, 255, 0.08);
            border: 1px solid var(--border-dim);
        }
        .feature-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .feature-item p {
            color: var(--text-weak);
            font-size: 0.9rem;
            line-height: 1.5;
        }

        @media (max-width: 640px) {
            .feature-item {
                padding: 16px;
            }
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            gap: 28px;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            text-align: center;
        }
        .stat-item {
            padding: 28px 16px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-dim);
            transition: all var(--transition);
        }
        .stat-item:hover {
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.50);
        }
        .stat-item .stat-num {
            font-size: 2.6rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--primary), #80f0ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-item .stat-label {
            color: var(--text-weak);
            font-size: 0.95rem;
            margin-top: 6px;
            font-weight: 500;
        }
        .stat-item .stat-suffix {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            -webkit-text-fill-color: var(--primary);
        }

        @media (max-width: 640px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .stat-num {
                font-size: 2rem;
            }
        }

        /* ===== 游戏分类卡片（封面图） ===== */
        .game-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-dim);
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            position: relative;
        }
        .game-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-glow);
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.70), 0 0 0 1px rgba(0, 229, 255, 0.10);
        }
        .game-card .gc-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
            border-radius: 0;
            transition: transform 0.50s ease;
        }
        .game-card:hover .gc-img {
            transform: scale(1.04);
        }
        .game-card .gc-body {
            padding: 18px 20px 22px;
        }
        .game-card .gc-body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .game-card .gc-body p {
            color: var(--text-weak);
            font-size: 0.85rem;
            line-height: 1.5;
        }
        .game-card .gc-body .gc-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(0, 229, 255, 0.08);
            border: 1px solid var(--border-dim);
            margin-top: 10px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-dim);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        .faq-item summary {
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-main);
            transition: color var(--transition);
            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: 0.85rem;
            color: var(--primary);
            transition: transform 0.35s ease;
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item[open] summary {
            color: var(--primary);
        }
        .faq-item .faq-answer {
            padding: 0 22px 18px;
            color: var(--text-weak);
            line-height: 1.7;
            font-size: 0.95rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            position: relative;
            isolation: isolate;
            padding: 80px 0;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 13, 23, 0.92) 30%, rgba(0, 229, 255, 0.15) 100%);
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2.6rem;
            font-weight: 900;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }
        .cta-section h2 span {
            background: linear-gradient(135deg, var(--primary), #80f0ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .cta-section p {
            color: var(--text-weak);
            font-size: 1.1rem;
            max-width: 540px;
            margin: 0 auto 32px;
        }
        .cta-section .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            padding: 16px 48px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1.1rem;
            color: #0b0d17;
            background: linear-gradient(135deg, var(--primary), #00bcd4);
            box-shadow: 0 4px 28px rgba(0, 229, 255, 0.35);
            transition: all var(--transition);
            border: none;
        }
        .cta-section .cta-btn:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 12px 44px rgba(0, 229, 255, 0.50);
            color: #0b0d17;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
            .cta-section .cta-btn {
                padding: 14px 32px;
                font-size: 1rem;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: #070912;
            border-top: 1px solid var(--border-dim);
            padding: 56px 0 32px;
        }
        .footer .footer-grid {
            display: grid;
            gap: 40px;
            grid-template-columns: 2fr 1fr 1fr;
            margin-bottom: 40px;
        }
        .footer .footer-brand .logo {
            font-size: 1.3rem;
            margin-bottom: 12px;
        }
        .footer .footer-brand p {
            color: var(--text-weak);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }
        .footer .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-main);
        }
        .footer .footer-col a {
            display: block;
            color: var(--text-weak);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: all var(--transition);
        }
        .footer .footer-col a:hover {
            color: var(--primary);
            transform: translateX(4px);
        }
        .footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding-top: 28px;
            border-top: 1px solid var(--border-dim);
            gap: 16px;
        }
        .footer .footer-bottom p {
            color: var(--text-weak);
            font-size: 0.85rem;
        }
        .footer .footer-socials {
            display: flex;
            gap: 14px;
        }
        .footer .footer-socials a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-weak);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-dim);
            transition: all var(--transition);
            font-size: 1.1rem;
        }
        .footer .footer-socials a:hover {
            color: var(--primary);
            border-color: var(--border-glow);
            background: rgba(0, 229, 255, 0.08);
            transform: translateY(-3px);
            box-shadow: 0 0 20px var(--primary-glow);
        }

        @media (max-width: 768px) {
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer .footer-brand p {
                max-width: 100%;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 额外辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-12 {
            gap: 12px;
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 1024px) {
            .card-grid.cols-3,
            .card-grid.cols-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .card-grid.cols-3,
            .card-grid.cols-4 {
                grid-template-columns: 1fr;
            }
        }