/* roulang page: index */
:root {
  --primary: #0a0a2e;
  --secondary: #d97706;
  --accent: #f59e0b;
  --deep: #06061a;
  --card-bg: #111130;
  --border-light: #1e1e4a;
  --text-light: #b0b0d0;
  --gold: #fbbf24;
  --radius: 1rem;
  --shadow: 0 20px 60px rgba(0,0,0,0.6);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;background:var(--deep);color:#e2e2f0;line-height:1.7}
a{color:inherit;text-decoration:none;transition:all 0.3s ease}
img{max-width:100%;height:auto;display:block}
button,input{font-family:inherit;transition:all 0.3s ease}
.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}
/* 左侧导航布局 */
.app-layout{display:flex;min-height:100vh}
.left-nav{width:16rem;position:fixed;top:0;left:0;bottom:0;background:var(--primary);border-right:1px solid var(--border-light);z-index:50;display:flex;flex-direction:column;overflow-y:auto;padding:1.5rem 1.25rem}
.main-area{margin-left:16rem;flex:1;width:100%;min-height:100vh}
/* 左侧导航内样式 */
.nav-logo{font-size:1.25rem;font-weight:800;color:var(--gold);letter-spacing:-0.02em;padding-bottom:1.5rem;border-bottom:1px solid var(--border-light);margin-bottom:1.5rem;display:flex;align-items:center;gap:0.5rem}
.nav-logo i{font-size:1.5rem;color:var(--accent)}
.nav-links{display:flex;flex-direction:column;gap:0.35rem}
.nav-link{display:flex;align-items:center;gap:0.75rem;padding:0.65rem 1rem;border-radius:0.75rem;font-weight:500;font-size:0.95rem;color:var(--text-light);transition:all 0.25s ease}
.nav-link i{width:1.25rem;text-align:center;font-size:1.1rem}
.nav-link:hover{background:rgba(217,119,6,0.12);color:#fff}
.nav-link.active{background:linear-gradient(135deg,rgba(217,119,6,0.25),rgba(217,119,6,0.08));color:var(--gold);font-weight:600;box-shadow:0 0 20px rgba(217,119,6,0.08)}
.nav-footer{margin-top:auto;padding-top:1.5rem;border-top:1px solid var(--border-light);font-size:0.75rem;color:var(--text-light)}
.nav-footer span{display:block;line-height:1.6}
/* 移动端顶栏 */
.mobile-top{display:none;position:sticky;top:0;z-index:100;background:var(--primary);border-bottom:1px solid var(--border-light);padding:0.75rem 1.25rem;align-items:center;justify-content:space-between}
.mobile-top .logo{font-size:1.1rem;font-weight:800;color:var(--gold)}
.mobile-menu-btn{background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;padding:0.25rem}
.mobile-drawer{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(6,6,26,0.95);z-index:200;padding:2rem 1.5rem;flex-direction:column}
.mobile-drawer.open{display:flex}
.drawer-close{align-self:flex-end;background:none;border:none;color:#fff;font-size:1.75rem;cursor:pointer;padding:0.25rem 0.5rem}
.drawer-links{display:flex;flex-direction:column;gap:0.75rem;margin-top:2rem}
.drawer-link{font-size:1.15rem;font-weight:600;padding:0.75rem 0;border-bottom:1px solid var(--border-light);color:var(--text-light)}
.drawer-link.active{color:var(--gold)}
/* Hero */
.hero-section{position:relative;min-height:85vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--deep) 0%,var(--primary) 60%,#0f0f3a 100%);overflow:hidden}
.hero-section::before{content:'';position:absolute;inset:0;background:url('/assets/images/backpic/back-1.png') center center/cover no-repeat;opacity:0.25;z-index:0;animation:heroZoom 20s ease-in-out infinite alternate}
@keyframes heroZoom{0%{transform:scale(1)}100%{transform:scale(1.08)}}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(6,6,26,0.85) 0%,rgba(10,10,46,0.7) 50%,rgba(6,6,26,0.9) 100%);z-index:1}
.hero-content{position:relative;z-index:2;text-align:center;max-width:800px;padding:2rem 1.5rem}
.hero-badge{display:inline-block;padding:0.4rem 1.25rem;border-radius:999px;background:rgba(217,119,6,0.15);border:1px solid rgba(217,119,6,0.3);color:var(--gold);font-size:0.85rem;font-weight:600;letter-spacing:0.05em;margin-bottom:1.5rem;backdrop-filter:blur(4px)}
.hero-title{font-size:clamp(2.4rem,7vw,4.5rem);font-weight:900;line-height:1.1;margin-bottom:1rem;background:linear-gradient(135deg,#fff 30%,var(--gold) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-sub{font-size:clamp(1rem,2vw,1.3rem);color:var(--text-light);max-width:600px;margin:0 auto 2rem;line-height:1.8}
.hero-actions{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}
.btn-primary{display:inline-flex;align-items:center;gap:0.5rem;padding:0.9rem 2.5rem;border-radius:999px;background:linear-gradient(135deg,var(--secondary),var(--accent));color:#fff;font-weight:700;font-size:1.05rem;border:none;cursor:pointer;box-shadow:0 8px 30px rgba(217,119,6,0.35);transition:all 0.3s ease}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 40px rgba(217,119,6,0.5)}
.btn-primary:active{transform:translateY(-1px)}
.btn-outline{display:inline-flex;align-items:center;gap:0.5rem;padding:0.9rem 2.5rem;border-radius:999px;background:transparent;color:#fff;font-weight:600;font-size:1.05rem;border:1.5px solid rgba(255,255,255,0.2);cursor:pointer;transition:all 0.3s ease}
.btn-outline:hover{background:rgba(255,255,255,0.06);border-color:rgba(255,255,255,0.4);transform:translateY(-3px)}
/* 通用板块 */
.section{padding:5rem 0}
.section-dark{background:var(--deep)}
.section-primary{background:var(--primary)}
.section-gradient{background:linear-gradient(180deg,var(--deep) 0%,var(--primary) 100%)}
.section-title{font-size:clamp(1.75rem,4vw,2.5rem);font-weight:800;text-align:center;margin-bottom:0.75rem;color:#fff}
.section-sub{text-align:center;color:var(--text-light);font-size:1.05rem;max-width:600px;margin:0 auto 3.5rem;line-height:1.7}
/* 卡片 */
.card{background:var(--card-bg);border-radius:var(--radius);border:1px solid var(--border-light);padding:1.75rem;transition:all 0.35s ease;overflow:hidden}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(217,119,6,0.2)}
.card-img{border-radius:0.75rem;overflow:hidden;margin-bottom:1.25rem;aspect-ratio:16/10;object-fit:cover;background:var(--deep)}
.card-title{font-size:1.15rem;font-weight:700;margin-bottom:0.5rem;color:#fff;line-height:1.4}
.card-text{color:var(--text-light);font-size:0.92rem;line-height:1.7}
.card-tag{display:inline-block;padding:0.2rem 0.8rem;border-radius:999px;background:rgba(217,119,6,0.12);color:var(--gold);font-size:0.75rem;font-weight:600;margin-bottom:0.75rem}
/* 网格 */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.75rem}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:1.75rem}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
/* 统计块 */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem}
.stat-card{text-align:center;padding:2rem 1rem;background:var(--card-bg);border-radius:var(--radius);border:1px solid var(--border-light);transition:all 0.3s ease}
.stat-card:hover{transform:translateY(-4px);border-color:rgba(217,119,6,0.2)}
.stat-number{font-size:2.5rem;font-weight:900;color:var(--gold);line-height:1.2;margin-bottom:0.25rem}
.stat-label{color:var(--text-light);font-size:0.9rem;font-weight:500}
/* 流程步骤 */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2.5rem;position:relative}
.step-item{text-align:center;position:relative}
.step-num{width:3.5rem;height:3.5rem;border-radius:999px;background:linear-gradient(135deg,var(--secondary),var(--accent));display:flex;align-items:center;justify-content:center;font-size:1.3rem;font-weight:900;color:#fff;margin:0 auto 1.25rem;box-shadow:0 8px 25px rgba(217,119,6,0.3)}
.step-title{font-size:1.1rem;font-weight:700;color:#fff;margin-bottom:0.5rem}
.step-desc{color:var(--text-light);font-size:0.92rem;line-height:1.7;max-width:280px;margin:0 auto}
/* FAQ */
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:0.75rem}
.faq-item{background:var(--card-bg);border-radius:0.75rem;border:1px solid var(--border-light);overflow:hidden;transition:all 0.3s ease}
.faq-item:hover{border-color:rgba(217,119,6,0.15)}
.faq-question{width:100%;padding:1.25rem 1.5rem;background:none;border:none;color:#fff;font-size:1rem;font-weight:600;text-align:left;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:1rem}
.faq-question i{color:var(--gold);transition:transform 0.3s ease;font-size:0.85rem}
.faq-item.open .faq-question i{transform:rotate(180deg)}
.faq-answer{padding:0 1.5rem 1.25rem;color:var(--text-light);font-size:0.92rem;line-height:1.8;display:none}
.faq-item.open .faq-answer{display:block}
/* CTA */
.cta-section{background:linear-gradient(135deg,var(--primary),#0f0f3a);border-radius:1.5rem;padding:4rem 3rem;text-align:center;border:1px solid var(--border-light);position:relative;overflow:hidden}
.cta-section::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}
.cta-title{font-size:clamp(1.5rem,3vw,2.2rem);font-weight:800;color:#fff;margin-bottom:0.75rem}
.cta-text{color:var(--text-light);font-size:1.05rem;margin-bottom:2rem;max-width:500px;margin-left:auto;margin-right:auto}
/* 页脚 */
.footer{background:var(--primary);border-top:1px solid var(--border-light);padding:3rem 0 1.5rem}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:2.5rem;margin-bottom:2.5rem}
.footer-brand .logo{font-size:1.2rem;font-weight:800;color:var(--gold);margin-bottom:0.75rem}
.footer-brand p{color:var(--text-light);font-size:0.88rem;line-height:1.8;max-width:300px}
.footer-col h4{font-size:0.95rem;font-weight:700;color:#fff;margin-bottom:1rem}
.footer-col a{display:block;color:var(--text-light);font-size:0.88rem;padding:0.3rem 0;transition:all 0.25s ease}
.footer-col a:hover{color:var(--gold);padding-left:4px}
.footer-bottom{border-top:1px solid var(--border-light);padding-top:1.5rem;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:0.75rem;font-size:0.82rem;color:var(--text-light)}
.footer-bottom a{color:var(--gold)}
/* 资讯列表 */
.post-list{display:grid;grid-template-columns:repeat(2,1fr);gap:1.25rem}
.post-card{display:flex;gap:1rem;background:var(--card-bg);border-radius:0.75rem;border:1px solid var(--border-light);padding:1.25rem;transition:all 0.3s ease}
.post-card:hover{transform:translateY(-3px);border-color:rgba(217,119,6,0.15);box-shadow:0 8px 25px rgba(0,0,0,0.3)}
.post-card-img{width:5.5rem;height:5.5rem;border-radius:0.5rem;object-fit:cover;flex-shrink:0;background:var(--deep)}
.post-card-info{flex:1;min-width:0}
.post-card-info .tag{font-size:0.7rem;color:var(--gold);font-weight:600;background:rgba(217,119,6,0.1);padding:0.1rem 0.6rem;border-radius:999px;display:inline-block;margin-bottom:0.35rem}
.post-card-info h4{font-size:0.95rem;font-weight:700;color:#fff;margin-bottom:0.25rem;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card-info .meta{font-size:0.75rem;color:var(--text-light)}
.empty-state{grid-column:1/-1;text-align:center;padding:3rem 1rem;color:var(--text-light);font-size:1rem}
/* 响应式 */
@media(max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .left-nav{display:none}
  .mobile-top{display:flex}
  .main-area{margin-left:0}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .grid-2{grid-template-columns:1fr}
  .post-list{grid-template-columns:1fr}
  .steps-grid{grid-template-columns:1fr;gap:2rem}
  .footer-grid{grid-template-columns:1fr}
  .hero-title{font-size:2.2rem}
  .section{padding:3rem 0}
  .cta-section{padding:2.5rem 1.5rem}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:520px){
  .grid-3,.grid-4{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr}
  .hero-actions{flex-direction:column;align-items:center}
  .btn-primary,.btn-outline{width:100%;justify-content:center}
  .post-card{flex-direction:column}
  .post-card-img{width:100%;height:8rem}
}
/* 滚动条 */
::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--deep)}
::-webkit-scrollbar-thumb{background:var(--border-light);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--text-light)}
/* 动画 */
.fade-up{animation:fadeUp 0.6s ease both}
@keyframes fadeUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.delay-1{animation-delay:0.1s}
.delay-2{animation-delay:0.2s}
.delay-3{animation-delay:0.3s}
.delay-4{animation-delay:0.4s}

/* roulang page: category1 */
:root {
            --primary: #4f6af5;
            --primary-dark: #3b4fdb;
            --primary-light: #818cf8;
            --accent: #f97316;
            --accent-dark: #ea580c;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --text-main: #0f172a;
            --text-muted: #64748b;
            --border-light: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 4px 25px rgba(0, 0, 0, 0.06);
            --shadow-elevated: 0 20px 50px -12px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.6;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            transition: var(--transition);
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 左侧导航 ===== */
        .layout-wrapper {
            display: flex;
            min-height: 100vh;
        }

        .left-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 220px;
            height: 100vh;
            background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 32px 20px;
            z-index: 100;
            border-right: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 4px 0 30px rgba(0, 0, 0, 0.2);
            overflow-y: auto;
        }

        .left-nav .nav-logo {
            font-size: 20px;
            font-weight: 700;
            color: #ffffff;
            display: flex;
            align-items: center;
            gap: 10px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            letter-spacing: 0.5px;
        }

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

        .left-nav .nav-links {
            display: flex;
            flex-direction: column;
            gap: 6px;
            padding-top: 24px;
            flex: 1;
        }

        .left-nav .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.65);
            font-weight: 500;
            font-size: 15px;
            transition: var(--transition);
            position: relative;
        }

        .left-nav .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: rgba(255, 255, 255, 0.45);
            transition: var(--transition);
        }

        .left-nav .nav-link:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.08);
        }

        .left-nav .nav-link:hover i {
            color: var(--accent);
        }

        .left-nav .nav-link.active {
            color: #ffffff;
            background: rgba(79, 106, 245, 0.2);
            border: 1px solid rgba(79, 106, 245, 0.3);
        }

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

        .left-nav .nav-link.active::before {
            content: '';
            position: absolute;
            left: -20px;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 24px;
            background: var(--primary-light);
            border-radius: 0 4px 4px 0;
        }

        .left-nav .nav-footer {
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.35);
            display: flex;
            flex-direction: column;
            gap: 4px;
            line-height: 1.5;
        }

        /* 移动端导航切换按钮 */
        .mobile-nav-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 110;
            background: #0f172a;
            color: #fff;
            border: none;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            font-size: 20px;
            cursor: pointer;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
        }

        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 99;
            backdrop-filter: blur(4px);
        }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: 220px;
            flex: 1;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        /* ===== Hero Banner ===== */
        .category-hero {
            position: relative;
            padding: 100px 0 80px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            z-index: 0;
            animation: pulseSoft 8s infinite alternate;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(79, 106, 245, 0.1) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(249, 115, 22, 0.08) 0%, transparent 60%);
            z-index: 1;
        }

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

        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(79, 106, 245, 0.15);
            border: 1px solid rgba(79, 106, 245, 0.25);
            padding: 6px 16px;
            border-radius: 50px;
            color: var(--primary-light);
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 20px;
            backdrop-filter: blur(10px);
        }

        .category-hero h1 {
            font-size: 44px;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .category-hero h1 span {
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .category-hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 640px;
            line-height: 1.7;
            margin-bottom: 28px;
        }

        .category-hero .hero-search {
            display: flex;
            gap: 12px;
            max-width: 520px;
            flex-wrap: wrap;
        }

        .category-hero .hero-search input {
            flex: 1;
            padding: 14px 20px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            font-size: 15px;
            outline: none;
            backdrop-filter: blur(10px);
            min-width: 200px;
        }

        .category-hero .hero-search input::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }

        .category-hero .hero-search input:focus {
            border-color: var(--primary-light);
            background: rgba(255, 255, 255, 0.1);
        }

        .category-hero .hero-search button {
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }

        .category-hero .hero-search button:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(79, 106, 245, 0.35);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(79, 106, 245, 0.08);
            padding: 4px 14px;
            border-radius: 50px;
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: #0f172a;
            line-height: 1.25;
            margin-bottom: 12px;
        }

        .section-subtitle {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.7;
        }

        .text-center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 指南卡片 ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
            margin-top: 40px;
        }

        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .guide-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(180deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }

        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-elevated);
            border-color: transparent;
        }

        .guide-card:hover::before {
            opacity: 1;
        }

        .guide-card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
            background: rgba(79, 106, 245, 0.08);
            color: var(--primary);
            transition: var(--transition);
        }

        .guide-card:hover .card-icon {
            background: var(--primary);
            color: #fff;
        }

        .guide-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #0f172a;
        }

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

        .guide-card .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
        }

        .guide-card .card-tag i {
            font-size: 12px;
            transition: var(--transition);
        }

        .guide-card:hover .card-tag i {
            transform: translateX(4px);
        }

        /* ===== 图文区块 ===== */
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            margin-top: 40px;
        }

        .feature-block.reverse {
            direction: rtl;
        }

        .feature-block.reverse>* {
            direction: ltr;
        }

        .feature-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-elevated);
            position: relative;
        }

        .feature-image img {
            width: 100%;
            height: 400px;
            object-fit: cover;
            transition: var(--transition);
        }

        .feature-image:hover img {
            transform: scale(1.03);
        }

        .feature-image .img-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 40px 28px 24px;
            background: linear-gradient(transparent, rgba(0, 0, 0, 0.6));
            color: #fff;
        }

        .feature-image .img-overlay span {
            font-size: 14px;
            font-weight: 500;
            opacity: 0.9;
        }

        .feature-text h3 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #0f172a;
        }

        .feature-text p {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .feature-text ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .feature-text ul li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: #1e293b;
        }

        .feature-text ul li i {
            color: var(--primary);
            font-size: 16px;
            margin-top: 4px;
            flex-shrink: 0;
        }

        /* ===== 步骤流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            margin-top: 48px;
            position: relative;
        }

        .steps-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 60px;
            right: 60px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--accent), transparent);
            opacity: 0.3;
        }

        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .step-item .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            margin: 0 auto 20px;
            box-shadow: 0 8px 25px rgba(79, 106, 245, 0.25);
            position: relative;
        }

        .step-item .step-number::after {
            content: '';
            position: absolute;
            inset: -4px;
            border-radius: 50%;
            border: 2px dashed rgba(79, 106, 245, 0.2);
            animation: spin 20s linear infinite;
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }

        .step-item h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
            color: #0f172a;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            max-width: 260px;
            margin: 0 auto;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 40px auto 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: 0 4px 20px rgba(79, 106, 245, 0.06);
        }

        .faq-item summary {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: #0f172a;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            list-style: none;
            gap: 16px;
        }

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

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

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

        .faq-item .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.8;
        }

        .faq-item .faq-answer a {
            color: var(--primary);
            font-weight: 500;
        }

        .faq-item .faq-answer a:hover {
            text-decoration: underline;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 80%, rgba(79, 106, 245, 0.08) 0%, transparent 60%);
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.65);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

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

        .cta-section .btn-primary {
            padding: 16px 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .cta-section .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(79, 106, 245, 0.35);
        }

        .cta-section .btn-secondary {
            padding: 16px 40px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            border: 1px solid rgba(255, 255, 255, 0.15);
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .cta-section .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.25);
            transform: translateY(-3px);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #0a0f1a;
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer .footer-brand .logo {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

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

        .footer .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.5);
            max-width: 320px;
        }

        .footer .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.5);
            font-size: 14px;
            padding: 4px 0;
            transition: var(--transition);
        }

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

        .footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }

        .footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

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

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            padding-top: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }

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

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

        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.25);
            font-size: 12px;
        }

        /* ===== 标签云 ===== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 24px;
        }

        .tag-cloud .tag {
            padding: 6px 16px;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.7);
            font-size: 13px;
            font-weight: 500;
            transition: var(--transition);
        }

        .tag-cloud .tag:hover {
            background: rgba(79, 106, 245, 0.2);
            border-color: rgba(79, 106, 245, 0.3);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .feature-block {
                gap: 40px;
            }

            .steps-grid::before {
                display: none;
            }
        }

        @media (max-width: 768px) {
            .mobile-nav-toggle {
                display: block;
            }

            .left-nav {
                transform: translateX(-100%);
                transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            }

            .left-nav.open {
                transform: translateX(0);
            }

            .mobile-nav-overlay.open {
                display: block;
            }

            .main-content {
                margin-left: 0;
                padding-top: 0;
            }

            .category-hero {
                padding: 80px 0 60px;
                min-height: auto;
            }

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

            .category-hero p {
                font-size: 15px;
            }

            .category-hero .hero-search {
                flex-direction: column;
            }

            .category-hero .hero-search input {
                min-width: auto;
            }

            .section {
                padding: 50px 0;
            }

            .section-title {
                font-size: 24px;
            }

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

            .feature-block.reverse {
                direction: ltr;
            }

            .feature-image img {
                height: 240px;
            }

            .guide-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

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

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

            .cta-section .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 12px;
            }

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

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .guide-card {
                padding: 24px 20px;
            }

            .faq-item summary {
                padding: 16px 18px;
                font-size: 15px;
            }

            .faq-item .faq-answer {
                padding: 0 18px 16px;
                font-size: 14px;
            }

            .cta-section .btn-primary,
            .cta-section .btn-secondary {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f172a;
            --primary-light: #1e293b;
            --accent: #f59e0b;
            --accent-hover: #d97706;
            --accent-light: #fef3c7;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-light: #94a3b8;
            --text-inverse: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
            --shadow-md: 0 8px 32px rgba(15, 23, 42, 0.10);
            --shadow-lg: 0 20px 48px rgba(15, 23, 42, 0.12);
            --nav-width: 240px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }
        /* ===== 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(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            display: flex;
            min-height: 100vh;
        }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; outline: none; border: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-primary); }
        h1 { font-size: 2.2rem; }
        h2 { font-size: 1.6rem; }
        h3 { font-size: 1.25rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        /* ===== Left Navigation ===== */
        .left-nav {
            position: fixed;
            top: 0; left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--bg-dark);
            color: var(--text-inverse);
            display: flex;
            flex-direction: column;
            padding: 32px 20px 20px;
            z-index: 1000;
            transition: transform var(--transition);
            overflow-y: auto;
            border-right: 1px solid rgba(255,255,255,0.06);
        }
        .nav-logo {
            font-size: 1.4rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            margin-bottom: 40px;
            padding-bottom: 20px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .nav-logo i { color: var(--accent); font-size: 1.6rem; }
        .nav-links { display: flex; flex-direction: column; gap: 6px; flex: 1; }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255,255,255,0.7);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
        }
        .nav-link i { width: 20px; text-align: center; font-size: 1rem; color: rgba(255,255,255,0.4); transition: color var(--transition); }
        .nav-link:hover { background: rgba(255,255,255,0.08); color: #fff; }
        .nav-link:hover i { color: var(--accent); }
        .nav-link.active { background: rgba(245,158,11,0.15); color: var(--accent); font-weight: 600; }
        .nav-link.active i { color: var(--accent); }
        .nav-footer {
            margin-top: auto;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.06);
            font-size: 0.75rem;
            color: rgba(255,255,255,0.35);
            display: flex;
            flex-direction: column;
            gap: 4px;
            line-height: 1.5;
        }
        .nav-footer span:last-child { color: rgba(255,255,255,0.2); font-size: 0.7rem; }
        /* ===== Main Content ===== */
        .main-wrap {
            margin-left: var(--nav-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            width: 100%;
        }
        /* ===== Article Hero / Banner ===== */
        .article-hero {
            position: relative;
            padding: 80px 0 60px;
            background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            isolation: isolate;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(15,23,42,0.60) 100%);
            z-index: 1;
            pointer-events: none;
        }
        .article-hero .container { position: relative; z-index: 2; }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.55);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-hero .breadcrumb a { color: rgba(255,255,255,0.55); transition: color var(--transition); }
        .article-hero .breadcrumb a:hover { color: var(--accent); }
        .article-hero .breadcrumb .sep { color: rgba(255,255,255,0.3); }
        .article-hero .breadcrumb .current { color: rgba(255,255,255,0.9); font-weight: 500; }
        .article-hero h1 {
            color: #fff;
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.25;
            max-width: 800px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.3);
            margin-bottom: 16px;
        }
        .article-hero .meta {
            display: flex;
            align-items: center;
            gap: 20px;
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .article-hero .meta span { display: flex; align-items: center; gap: 6px; }
        .article-hero .meta i { color: var(--accent); }
        .article-hero .meta .category-badge {
            background: rgba(245,158,11,0.2);
            color: var(--accent);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            border: 1px solid rgba(245,158,11,0.3);
        }
        /* ===== Article Body ===== */
        .article-section {
            padding: 60px 0 40px;
        }
        .article-body {
            max-width: 820px;
            margin: 0 auto;
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.8;
            color: var(--text-secondary);
        }
        .article-body .content p {
            margin-bottom: 1.4rem;
            color: var(--text-secondary);
        }
        .article-body .content h2, .article-body .content h3 {
            margin-top: 2rem;
            margin-bottom: 1rem;
            color: var(--text-primary);
        }
        .article-body .content img {
            border-radius: var(--radius);
            margin: 2rem auto;
            box-shadow: var(--shadow-md);
            width: 100%;
            max-width: 760px;
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--accent);
            background: var(--accent-light);
            padding: 20px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.8rem 0;
            font-style: italic;
            color: var(--text-primary);
        }
        .article-body .content blockquote p { margin-bottom: 0; color: var(--text-primary); }
        .article-body .content ul, .article-body .content ol {
            padding-left: 24px;
            margin-bottom: 1.4rem;
            color: var(--text-secondary);
        }
        .article-body .content ul { list-style: disc; }
        .article-body .content ol { list-style: decimal; }
        .article-body .content li { margin-bottom: 0.5rem; }
        .article-body .content a { color: var(--accent-hover); text-decoration: underline; }
        .article-body .content a:hover { color: var(--accent); }
        /* ===== Tags ===== */
        .article-tags {
            margin-top: 40px;
            padding-top: 30px;
            border-top: 1px solid var(--border);
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
        }
        .article-tags .tag-label { font-size: 0.85rem; color: var(--text-light); font-weight: 500; }
        .article-tags .tag {
            background: var(--bg-body);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 6px 16px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            font-weight: 500;
            transition: all var(--transition);
        }
        .article-tags .tag:hover { background: var(--accent-light); border-color: var(--accent); color: var(--accent-hover); }
        /* ===== Navigation Prev/Next ===== */
        .post-nav {
            margin-top: 40px;
            padding-top: 30px;
            border-top: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .post-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 14px 22px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            flex: 1;
            min-width: 180px;
        }
        .post-nav a:hover { border-color: var(--accent); color: var(--accent-hover); box-shadow: var(--shadow); transform: translateY(-2px); }
        .post-nav a i { color: var(--accent); }
        .post-nav .next { text-align: right; justify-content: flex-end; }
        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-card);
            border-top: 1px solid var(--border);
        }
        .related-section h2 {
            font-size: 1.5rem;
            margin-bottom: 32px;
            text-align: center;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
        }
        .related-section h2 i { color: var(--accent); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-body);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }
        .related-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); border-color: transparent; }
        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 20px;
        }
        .related-card .card-body h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body p {
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .meta-sm {
            font-size: 0.75rem;
            color: var(--text-light);
            margin-top: 10px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-card .card-body .meta-sm i { color: var(--accent); }
        /* ===== CTA ===== */
        .cta-section {
            padding: 70px 0;
            background: var(--bg-dark) url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            isolation: isolate;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.85) 0%, rgba(15,23,42,0.70) 100%);
            z-index: 1;
            pointer-events: none;
        }
        .cta-section .container { position: relative; z-index: 2; text-align: center; }
        .cta-section h2 { color: #fff; font-size: 1.8rem; margin-bottom: 16px; }
        .cta-section p { color: rgba(255,255,255,0.7); max-width: 560px; margin: 0 auto 28px; font-size: 1.05rem; }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: var(--bg-dark);
            padding: 16px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition);
            box-shadow: 0 8px 24px rgba(245,158,11,0.3);
        }
        .cta-section .btn-cta:hover { background: #fff; transform: translateY(-3px); box-shadow: 0 12px 32px rgba(245,158,11,0.4); }
        /* ===== Error State ===== */
        .error-section {
            padding: 100px 0;
            text-align: center;
        }
        .error-section .error-icon { font-size: 4rem; color: var(--text-light); margin-bottom: 20px; }
        .error-section h2 { font-size: 1.8rem; margin-bottom: 12px; }
        .error-section p { color: var(--text-secondary); margin-bottom: 28px; font-size: 1.05rem; }
        .error-section .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: var(--bg-dark);
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            transition: all var(--transition);
        }
        .error-section .btn-back:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: var(--shadow); }
        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 30px;
            margin-top: auto;
        }
        .footer .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { font-size: 1.3rem; font-weight: 700; color: #fff; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
        .footer-brand .logo i { color: var(--accent); }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.5); line-height: 1.7; max-width: 320px; }
        .footer-col h4 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
        .footer-col a { display: block; color: rgba(255,255,255,0.5); font-size: 0.9rem; margin-bottom: 10px; transition: color var(--transition); }
        .footer-col a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            color: rgba(255,255,255,0.3);
            flex-wrap: wrap;
            gap: 10px;
        }
        .footer-bottom a { color: rgba(255,255,255,0.3); transition: color var(--transition); }
        .footer-bottom a:hover { color: var(--accent); }
        /* ===== Mobile Toggle ===== */
        .nav-toggle {
            display: none;
            position: fixed;
            top: 16px; left: 16px;
            z-index: 1100;
            background: var(--bg-dark);
            color: #fff;
            border: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            font-size: 1.3rem;
            cursor: pointer;
            box-shadow: var(--shadow);
            transition: background var(--transition);
            align-items: center;
            justify-content: center;
        }
        .nav-toggle:hover { background: var(--primary-light); }
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.5);
            z-index: 999;
            backdrop-filter: blur(4px);
        }
        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            :root { --nav-width: 0px; }
            .left-nav {
                transform: translateX(-100%);
                width: 280px;
                padding: 24px 18px 18px;
            }
            .left-nav.open { transform: translateX(0); }
            .nav-toggle { display: flex; }
            .nav-overlay.open { display: block; }
            .main-wrap { margin-left: 0; padding-top: 0; }
            .article-hero { padding: 60px 0 40px; }
            .article-hero h1 { font-size: 1.6rem; }
            .article-body { padding: 0 4px; }
            .article-body .content { font-size: 1rem; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 30px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .post-nav { flex-direction: column; }
            .post-nav a { min-width: auto; }
            .cta-section h2 { font-size: 1.4rem; }
            .cta-section .btn-cta { padding: 14px 28px; font-size: 0.9rem; }
        }
        @media (max-width: 520px) {
            .article-hero h1 { font-size: 1.3rem; }
            .article-hero .meta { font-size: 0.8rem; gap: 12px; }
            .article-body .content { font-size: 0.95rem; }
            .related-card img { height: 140px; }
            .cta-section { padding: 50px 0; }
            .cta-section h2 { font-size: 1.2rem; }
            .error-section { padding: 60px 0; }
            .error-section .error-icon { font-size: 3rem; }
        }