/* roulang page: index */
/* ===== Reset & Base ===== */
    *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
    html{scroll-behavior:smooth;font-size:16px}
    body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;line-height:1.7;color:#e8e8f0;background:#0a0a18;-webkit-font-smoothing:antialiased;overflow-x:hidden}
    a{color:#b8b8ff;text-decoration:none;transition:color .25s}
    a:hover{color:#8a8aff}
    img{max-width:100%;height:auto;display:block}
    button,input,textarea{font-family:inherit;font-size:1rem;border:none;outline:none}
    ul,ol{list-style:none}
    h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700;color:#fff}
    ::selection{background:#6c5ce7;color:#fff}

    /* ===== Design Variables ===== */
    :root{
      --primary:#6c5ce7;
      --primary-dark:#5a4bd1;
      --primary-light:#8a7aff;
      --secondary:#fdcb6e;
      --accent:#00cec9;
      --bg-body:#0a0a18;
      --bg-card:#12122a;
      --bg-card-hover:#1a1a3a;
      --bg-sidebar:#0d0d22;
      --bg-dark:#080812;
      --text:#e8e8f0;
      --text-muted:#8888aa;
      --text-light:#b0b0c8;
      --border:#1e1e3a;
      --border-light:#2a2a4a;
      --radius:14px;
      --radius-sm:8px;
      --shadow:0 8px 40px rgba(0,0,0,0.5);
      --shadow-sm:0 4px 16px rgba(0,0,0,0.3);
      --transition:0.3s cubic-bezier(0.4,0,0.2,1);
      --sidebar-width:240px;
      --header-height:64px;
      --max-width:1280px;
    }

    /* ===== Container ===== */
    .container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}
    @media(max-width:768px){.container{padding:0 16px}}

    /* ===== Sidebar Layout ===== */
    .app-wrapper{display:flex;min-height:100vh}
    .sidebar{
      position:fixed;top:0;left:0;width:var(--sidebar-width);height:100vh;
      background:var(--bg-sidebar);border-right:1px solid var(--border);
      display:flex;flex-direction:column;z-index:1000;
      transition:transform var(--transition);
      overflow-y:auto;
    }
    .sidebar-brand{
      padding:24px 20px 16px;border-bottom:1px solid var(--border);
      display:flex;align-items:center;gap:12px;
    }
    .sidebar-brand .logo-icon{
      width:38px;height:38px;border-radius:10px;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      display:flex;align-items:center;justify-content:center;
      font-size:1.3rem;color:#fff;flex-shrink:0;
    }
    .sidebar-brand .logo-text{
      font-size:1.2rem;font-weight:800;color:#fff;letter-spacing:0.5px;
      background:linear-gradient(135deg,#fff 60%,var(--secondary));
      -webkit-background-clip:text;-webkit-text-fill-color:transparent;
      background-clip:text;
    }
    .sidebar-nav{padding:16px 12px;flex:1}
    .sidebar-nav .nav-label{
      font-size:0.7rem;text-transform:uppercase;letter-spacing:1px;
      color:var(--text-muted);padding:8px 12px 6px;font-weight:600;
    }
    .sidebar-nav a{
      display:flex;align-items:center;gap:12px;
      padding:10px 16px;border-radius:var(--radius-sm);
      color:var(--text-light);font-size:0.95rem;font-weight:500;
      transition:all var(--transition);margin-bottom:2px;
    }
    .sidebar-nav a i{width:20px;text-align:center;font-size:1.1rem;color:var(--text-muted);transition:color var(--transition)}
    .sidebar-nav a:hover{background:rgba(108,92,231,0.12);color:#fff}
    .sidebar-nav a:hover i{color:var(--primary-light)}
    .sidebar-nav a.active{
      background:rgba(108,92,231,0.18);color:#fff;font-weight:600;
      border-left:3px solid var(--primary);
    }
    .sidebar-nav a.active i{color:var(--primary-light)}
    .sidebar-footer{
      padding:16px 20px;border-top:1px solid var(--border);
      font-size:0.75rem;color:var(--text-muted);text-align:center;
    }

    /* ===== Mobile Header ===== */
    .mobile-header{
      display:none;position:fixed;top:0;left:0;right:0;height:var(--header-height);
      background:rgba(10,10,24,0.92);backdrop-filter:blur(16px);
      border-bottom:1px solid var(--border);z-index:999;
      padding:0 16px;align-items:center;justify-content:space-between;
    }
    .mobile-header .logo-text{
      font-size:1.1rem;font-weight:800;color:#fff;
      background:linear-gradient(135deg,#fff 60%,var(--secondary));
      -webkit-background-clip:text;-webkit-text-fill-color:transparent;
      background-clip:text;
    }
    .mobile-header .hamburger{
      width:40px;height:40px;border-radius:var(--radius-sm);
      background:rgba(255,255,255,0.06);border:none;color:#fff;
      font-size:1.3rem;cursor:pointer;display:flex;align-items:center;justify-content:center;
      transition:background var(--transition);
    }
    .mobile-header .hamburger:hover{background:rgba(255,255,255,0.12)}

    /* ===== Main Content ===== */
    .main-content{
      margin-left:var(--sidebar-width);flex:1;min-height:100vh;
      padding-top:0;transition:margin var(--transition);
    }

    /* ===== Hero ===== */
    .hero{
      position:relative;min-height:80vh;display:flex;align-items:center;
      justify-content:center;text-align:center;padding:80px 24px 60px;
      overflow:hidden;background:#080812;
    }
    .hero-bg{
      position:absolute;inset:0;
      background:url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
      opacity:0.35;z-index:0;
    }
    .hero-overlay{
      position:absolute;inset:0;
      background:linear-gradient(180deg,rgba(10,10,24,0.50) 0%,rgba(10,10,24,0.92) 100%);
      z-index:1;
    }
    .hero-content{position:relative;z-index:2;max-width:820px;width:100%}
    .hero-badge{
      display:inline-block;padding:6px 20px;border-radius:50px;
      background:rgba(108,92,231,0.20);border:1px solid rgba(108,92,231,0.30);
      font-size:0.85rem;color:var(--primary-light);font-weight:600;
      margin-bottom:24px;letter-spacing:0.5px;
    }
    .hero h1{
      font-size:3.4rem;font-weight:900;line-height:1.15;margin-bottom:20px;
      background:linear-gradient(135deg,#fff 40%,var(--secondary) 100%);
      -webkit-background-clip:text;-webkit-text-fill-color:transparent;
      background-clip:text;
    }
    .hero p{
      font-size:1.2rem;color:var(--text-light);max-width:620px;margin:0 auto 36px;
      line-height:1.8;
    }
    .hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
    .btn{
      display:inline-flex;align-items:center;gap:10px;padding:14px 36px;
      border-radius:50px;font-weight:700;font-size:1rem;cursor:pointer;
      transition:all var(--transition);border:none;
    }
    .btn-primary{
      background:linear-gradient(135deg,var(--primary),var(--primary-dark));
      color:#fff;box-shadow:0 4px 20px rgba(108,92,231,0.35);
    }
    .btn-primary:hover{transform:translateY(-3px);box-shadow:0 8px 32px rgba(108,92,231,0.45);color:#fff}
    .btn-outline{
      background:transparent;border:2px solid rgba(255,255,255,0.20);
      color:#fff;
    }
    .btn-outline:hover{background:rgba(255,255,255,0.08);border-color:rgba(255,255,255,0.35);color:#fff;transform:translateY(-3px)}
    .btn-sm{padding:10px 24px;font-size:0.9rem}

    /* ===== Section ===== */
    .section{padding:80px 0;position:relative}
    .section-dark{background:var(--bg-dark)}
    .section-card{background:var(--bg-card)}
    .section-header{
      text-align:center;margin-bottom:48px;
    }
    .section-header h2{
      font-size:2.2rem;font-weight:800;margin-bottom:12px;
    }
    .section-header p{
      color:var(--text-muted);font-size:1.05rem;max-width:600px;margin:0 auto;
    }
    .section-header .section-tag{
      display:inline-block;padding:4px 16px;border-radius:50px;
      background:rgba(108,92,231,0.12);font-size:0.8rem;color:var(--primary-light);
      font-weight:600;margin-bottom:12px;letter-spacing:0.5px;
    }

    /* ===== Grid / Cards ===== */
    .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
    .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
    .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:28px}
    .card{
      background:var(--bg-card);border-radius:var(--radius);
      border:1px solid var(--border);overflow:hidden;
      transition:all var(--transition);
    }
    .card:hover{
      border-color:var(--border-light);transform:translateY(-4px);
      box-shadow:var(--shadow);background:var(--bg-card-hover);
    }
    .card-img{width:100%;height:200px;object-fit:cover;display:block}
    .card-body{padding:20px 24px 24px}
    .card-body h3{font-size:1.15rem;margin-bottom:8px;font-weight:700}
    .card-body p{color:var(--text-muted);font-size:0.92rem;line-height:1.7}
    .card-tag{
      display:inline-block;padding:2px 12px;border-radius:50px;
      background:rgba(108,92,231,0.12);font-size:0.75rem;color:var(--primary-light);
      font-weight:600;margin-bottom:10px;
    }
    .card-meta{display:flex;align-items:center;gap:12px;margin-top:14px;font-size:0.85rem;color:var(--text-muted)}
    .card-meta i{font-size:0.8rem}

    /* ===== Feature / Stats ===== */
    .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
    .stat-card{
      text-align:center;padding:32px 20px;border-radius:var(--radius);
      background:var(--bg-card);border:1px solid var(--border);
      transition:all var(--transition);
    }
    .stat-card:hover{border-color:var(--primary);transform:translateY(-2px)}
    .stat-card .stat-number{
      font-size:2.6rem;font-weight:900;color:#fff;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      -webkit-background-clip:text;-webkit-text-fill-color:transparent;
      background-clip:text;line-height:1.2;
    }
    .stat-card .stat-label{font-size:0.95rem;color:var(--text-muted);margin-top:6px}

    /* ===== Feature Blocks ===== */
    .feature-block{
      display:flex;align-items:center;gap:48px;
      padding:48px 0;border-bottom:1px solid var(--border);
    }
    .feature-block:last-child{border-bottom:none}
    .feature-block.reverse{flex-direction:row-reverse}
    .feature-block .feature-text{flex:1}
    .feature-block .feature-text h3{font-size:1.6rem;margin-bottom:12px}
    .feature-block .feature-text p{color:var(--text-muted);font-size:1rem;line-height:1.8}
    .feature-block .feature-img{
      flex:0 0 380px;border-radius:var(--radius);overflow:hidden;
      box-shadow:var(--shadow);
    }
    .feature-block .feature-img img{width:100%;height:260px;object-fit:cover}

    /* ===== Review / Rating Card ===== */
    .review-card{
      display:flex;gap:24px;padding:28px 32px;
      background:var(--bg-card);border-radius:var(--radius);
      border:1px solid var(--border);transition:all var(--transition);
    }
    .review-card:hover{border-color:var(--border-light);transform:translateY(-2px)}
    .review-card .rating{
      flex-shrink:0;width:80px;height:80px;border-radius:50%;
      background:linear-gradient(135deg,var(--primary),var(--accent));
      display:flex;flex-direction:column;align-items:center;justify-content:center;
      color:#fff;font-weight:900;font-size:1.6rem;line-height:1.2;
    }
    .review-card .rating small{font-size:0.65rem;font-weight:400;opacity:0.85}
    .review-card .review-content{flex:1}
    .review-card .review-content h4{font-size:1.1rem;margin-bottom:4px}
    .review-card .review-content .review-meta{font-size:0.82rem;color:var(--text-muted);margin-bottom:8px}
    .review-card .review-content p{color:var(--text-light);font-size:0.92rem;line-height:1.7}

    /* ===== FAQ ===== */
    .faq-grid{max-width:760px;margin:0 auto}
    .faq-item{
      border-bottom:1px solid var(--border);padding:20px 0;
      cursor:pointer;
    }
    .faq-item:first-child{padding-top:0}
    .faq-question{
      display:flex;justify-content:space-between;align-items:center;
      font-size:1.05rem;font-weight:600;color:#fff;
      transition:color var(--transition);
    }
    .faq-question i{color:var(--text-muted);transition:transform var(--transition);font-size:0.9rem}
    .faq-item.active .faq-question i{transform:rotate(180deg)}
    .faq-item.active .faq-question{color:var(--primary-light)}
    .faq-answer{
      max-height:0;overflow:hidden;transition:max-height 0.35s ease, padding 0.35s ease;
      color:var(--text-muted);font-size:0.95rem;line-height:1.8;
    }
    .faq-item.active .faq-answer{
      max-height:300px;padding-top:12px;
    }

    /* ===== CTA ===== */
    .cta-section{
      background:linear-gradient(135deg,var(--bg-card),#14142e);
      border:1px solid var(--border);border-radius:var(--radius);
      padding:60px 48px;text-align:center;
      position:relative;overflow:hidden;
    }
    .cta-section::before{
      content:'';position:absolute;top:-50%;right:-30%;
      width:400px;height:400px;border-radius:50%;
      background:radial-gradient(circle,rgba(108,92,231,0.12),transparent 70%);
    }
    .cta-section h2{font-size:2rem;margin-bottom:12px;position:relative}
    .cta-section p{color:var(--text-muted);font-size:1.05rem;max-width:500px;margin:0 auto 28px;position:relative}
    .cta-section .btn{position:relative}

    /* ===== Footer ===== */
    .footer{
      background:var(--bg-dark);border-top:1px solid var(--border);
      padding:48px 24px 32px;margin-top:40px;
    }
    .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:32px}
    .footer-brand .logo-text{
      font-size:1.15rem;font-weight:800;color:#fff;display:block;margin-bottom:8px;
    }
    .footer-brand p{color:var(--text-muted);font-size:0.88rem;max-width:280px;line-height:1.8}
    .footer-col h4{font-size:0.95rem;font-weight:700;color:#fff;margin-bottom:16px}
    .footer-col a{
      display:block;padding:4px 0;font-size:0.88rem;color:var(--text-muted);
      transition:color var(--transition);
    }
    .footer-col a:hover{color:var(--primary-light)}
    .footer-bottom{
      border-top:1px solid var(--border);padding-top:20px;
      display:flex;justify-content:space-between;align-items:center;
      font-size:0.82rem;color:var(--text-muted);flex-wrap:wrap;gap:12px;
    }
    .footer-bottom a{color:var(--text-muted);margin-left:16px}
    .footer-bottom a:hover{color:var(--primary-light)}

    /* ===== Latest Posts List ===== */
    .post-list{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
    .post-item{
      display:flex;gap:16px;padding:16px 20px;
      background:var(--bg-card);border-radius:var(--radius-sm);
      border:1px solid var(--border);transition:all var(--transition);
    }
    .post-item:hover{border-color:var(--border-light);background:var(--bg-card-hover);transform:translateX(4px)}
    .post-item .post-icon{
      flex-shrink:0;width:44px;height:44px;border-radius:10px;
      background:rgba(108,92,231,0.12);display:flex;align-items:center;justify-content:center;
      color:var(--primary-light);font-size:1.1rem;
    }
    .post-item .post-info{flex:1;min-width:0}
    .post-item .post-info h4{font-size:0.95rem;font-weight:600;margin-bottom:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .post-item .post-info p{font-size:0.82rem;color:var(--text-muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
    .post-item .post-meta{display:flex;gap:12px;font-size:0.75rem;color:var(--text-muted);margin-top:6px}
    .post-empty{
      grid-column:1/-1;text-align:center;padding:40px 20px;
      color:var(--text-muted);font-size:1rem;
      background:var(--bg-card);border-radius:var(--radius);border:1px dashed var(--border);
    }

    /* ===== Mobile Overlay ===== */
    .sidebar-overlay{
      display:none;position:fixed;inset:0;background:rgba(0,0,0,0.6);
      z-index:999;backdrop-filter:blur(4px);
    }

    /* ===== Responsive ===== */
    @media(max-width:1024px){
      .grid-4{grid-template-columns:repeat(2,1fr)}
      .stats-grid{grid-template-columns:repeat(2,1fr)}
      .footer-grid{grid-template-columns:1fr 1fr}
      .post-list{grid-template-columns:1fr}
      .review-card{flex-direction:column;align-items:flex-start}
      .review-card .rating{width:60px;height:60px;font-size:1.3rem}
    }

    @media(max-width:768px){
      .sidebar{transform:translateX(-100%)}
      .sidebar.open{transform:translateX(0)}
      .sidebar-overlay.open{display:block}
      .mobile-header{display:flex}
      .main-content{margin-left:0;padding-top:var(--header-height)}
      .hero{min-height:60vh;padding:60px 16px 40px}
      .hero h1{font-size:2.2rem}
      .hero p{font-size:1rem}
      .grid-3{grid-template-columns:1fr}
      .grid-2{grid-template-columns:1fr}
      .grid-4{grid-template-columns:1fr}
      .stats-grid{grid-template-columns:repeat(2,1fr);gap:12px}
      .stat-card{padding:20px 12px}
      .stat-card .stat-number{font-size:2rem}
      .section{padding:48px 0}
      .section-header h2{font-size:1.6rem}
      .feature-block{flex-direction:column!important;gap:24px;padding:32px 0}
      .feature-block .feature-img{flex:0 0 100%}
      .feature-block .feature-img img{height:200px}
      .cta-section{padding:40px 24px}
      .cta-section h2{font-size:1.5rem}
      .footer-grid{grid-template-columns:1fr;gap:24px}
      .footer-bottom{flex-direction:column;text-align:center}
      .footer-bottom .links{margin-top:8px}
      .footer-bottom .links a{margin:0 8px}
      .review-card{padding:20px}
      .post-item{padding:12px 16px}
    }

    @media(max-width:520px){
      .hero h1{font-size:1.8rem}
      .hero-actions{flex-direction:column;align-items:center}
      .hero-actions .btn{width:100%;justify-content:center}
      .stats-grid{grid-template-columns:1fr 1fr}
      .section-header h2{font-size:1.35rem}
    }

    /* ===== Utilities ===== */
    .text-center{text-align:center}
    .mt-16{margin-top:16px}
    .mt-24{margin-top:24px}
    .mt-32{margin-top:32px}
    .mb-24{margin-bottom:24px}
    .gap-16{gap:16px}
    .flex-center{display:flex;align-items:center;justify-content:center}

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
    --primary: #1a1a2e;
    --primary-light: #16213e;
    --primary-dark: #0f0f1a;
    --accent: #e94560;
    --accent-hover: #d63850;
    --accent-glow: rgba(233, 69, 96, 0.25);
    --bg-body: #f5f6fa;
    --bg-card: #ffffff;
    --bg-sidebar: #1a1a2e;
    --bg-sidebar-hover: #2a2a4e;
    --bg-sidebar-active: #e94560;
    --text-primary: #1e1e2a;
    --text-secondary: #4a4a5a;
    --text-muted: #8a8a9a;
    --text-light: #f0f0f5;
    --text-sidebar: #c0c0d0;
    --border-color: #e2e2ee;
    --border-light: #f0f0f5;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
    --shadow-md: 0 8px 30px rgba(0,0,0,0.06);
    --shadow-lg: 0 20px 50px rgba(0,0,0,0.10);
    --shadow-sidebar: 4px 0 20px rgba(0,0,0,0.08);
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --sidebar-width: 240px;
    --content-max: 820px;
    --font-base: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
    --line-relaxed: 1.75;
    --line-tight: 1.3;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-base);
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: var(--line-relaxed);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: var(--line-tight); font-weight: 700; color: var(--text-primary); }

/* ===== 侧边栏 ===== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--bg-sidebar);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    box-shadow: var(--shadow-sidebar);
    transition: transform 0.3s ease;
}
.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 28px 20px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}
.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--accent);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 20px;
    flex-shrink: 0;
}
.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.5px;
}
.sidebar-nav {
    flex: 1;
    padding: 20px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.nav-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: rgba(255,255,255,0.3);
    padding: 8px 12px 4px;
    font-weight: 600;
}
.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    color: var(--text-sidebar);
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}
.sidebar-nav a i { width: 20px; text-align: center; font-size: 16px; opacity: 0.7; }
.sidebar-nav a:hover {
    background: var(--bg-sidebar-hover);
    color: #fff;
}
.sidebar-nav a.active {
    background: var(--bg-sidebar-active);
    color: #fff;
    box-shadow: 0 4px 15px rgba(233,69,96,0.3);
}
.sidebar-nav a.active i { opacity: 1; }
.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255,255,255,0.06);
    font-size: 12px;
    color: rgba(255,255,255,0.3);
    text-align: center;
    letter-spacing: 0.3px;
}

/* ===== 主内容区 ===== */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== 文章头部 Hero ===== */
.article-hero {
    position: relative;
    padding: 60px 40px 40px;
    background: var(--primary-dark);
    color: #fff;
    overflow: hidden;
    min-height: 320px;
    display: flex;
    align-items: flex-end;
}
.article-hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.25;
    z-index: 0;
}
.article-hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15,15,26,0.95) 0%, rgba(15,15,26,0.4) 100%);
}
.article-hero .container {
    position: relative;
    z-index: 1;
    max-width: var(--content-max);
    width: 100%;
    margin: 0 auto;
}
.article-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: rgba(255,255,255,0.5);
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.article-breadcrumb a { color: rgba(255,255,255,0.6); }
.article-breadcrumb a:hover { color: #fff; }
.article-breadcrumb .sep { opacity: 0.4; }
.article-category-badge {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 20px;
    background: var(--accent);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.3px;
    margin-bottom: 16px;
}
.article-hero h1 {
    font-size: 2.4rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.25;
    margin-bottom: 20px;
    letter-spacing: -0.3px;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 14px;
    color: rgba(255,255,255,0.6);
}
.article-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}
.article-meta i { opacity: 0.6; font-size: 13px; }

/* ===== 文章正文 ===== */
.article-body-wrap {
    padding: 40px 40px 60px;
    flex: 1;
}
.article-body-wrap .container {
    max-width: var(--content-max);
    margin: 0 auto;
}
.article-body {
    font-size: 17px;
    line-height: var(--line-relaxed);
    color: var(--text-primary);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 48px 52px;
    box-shadow: var(--shadow-md);
}
.article-body p {
    margin-bottom: 1.4em;
}
.article-body h2 {
    font-size: 1.6rem;
    margin: 1.8em 0 0.6em;
    color: var(--primary);
    border-bottom: 2px solid var(--border-light);
    padding-bottom: 8px;
}
.article-body h3 {
    font-size: 1.25rem;
    margin: 1.4em 0 0.5em;
    color: var(--primary-light);
}
.article-body img {
    border-radius: var(--radius-md);
    margin: 1.6em auto;
    box-shadow: var(--shadow-sm);
}
.article-body blockquote {
    border-left: 4px solid var(--accent);
    padding: 16px 24px;
    margin: 1.6em 0;
    background: var(--bg-body);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
    font-style: italic;
}
.article-body ul, .article-body ol {
    margin: 1em 0;
    padding-left: 1.8em;
}
.article-body li {
    margin-bottom: 0.5em;
    list-style: disc;
}
.article-body a { text-decoration: underline; }

/* ===== 文章标签 ===== */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}
.article-tags .tag {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    background: var(--bg-body);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}
.article-tags .tag:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

/* ===== 文章导航（上下篇） ===== */
.article-nav {
    max-width: var(--content-max);
    margin: 0 auto 40px;
    padding: 0 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.article-nav a {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 20px 24px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-light);
}
.article-nav a:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--accent);
}
.article-nav .nav-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: none;
    letter-spacing: 0;
    padding: 0;
    font-weight: 500;
}
.article-nav .nav-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.article-nav .next { text-align: right; }

/* ===== 相关文章 ===== */
.related-section {
    padding: 60px 40px;
    background: var(--bg-body);
}
.related-section .container {
    max-width: 1100px;
    margin: 0 auto;
}
.related-section h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 32px;
    color: var(--primary);
    position: relative;
    padding-bottom: 12px;
}
.related-section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--accent);
    border-radius: 4px;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.related-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-light);
}
.related-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--accent);
}
.related-card-img {
    height: 180px;
    background-size: cover;
    background-position: center;
    position: relative;
}
.related-card-img .cat-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 12px;
    background: var(--accent);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    border-radius: 4px;
}
.related-card-body {
    padding: 20px;
}
.related-card-body h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-card-body h3 a { color: var(--text-primary); }
.related-card-body h3 a:hover { color: var(--accent); }
.related-card-body p {
    font-size: 14px;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 12px;
}
.related-card-body .meta {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    gap: 16px;
}
.related-card-body .meta i { margin-right: 4px; }

/* ===== CTA 区块 ===== */
.article-cta {
    padding: 60px 40px;
    background: var(--primary-dark);
    color: #fff;
    text-align: center;
}
.article-cta .container {
    max-width: 600px;
    margin: 0 auto;
}
.article-cta h2 {
    font-size: 1.8rem;
    color: #fff;
    margin-bottom: 12px;
}
.article-cta p {
    color: rgba(255,255,255,0.7);
    margin-bottom: 24px;
    font-size: 16px;
}
.article-cta .btn-cta {
    display: inline-block;
    padding: 14px 44px;
    background: var(--accent);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    border-radius: 50px;
    transition: var(--transition);
    box-shadow: 0 6px 25px var(--accent-glow);
}
.article-cta .btn-cta:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 35px rgba(233,69,96,0.4);
}

/* ===== Footer ===== */
.footer {
    background: var(--primary);
    color: rgba(255,255,255,0.7);
    padding: 60px 40px 30px;
    margin-top: auto;
}
.footer .container {
    max-width: 1100px;
    margin: 0 auto;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand .logo-text {
    font-size: 22px;
    display: block;
    margin-bottom: 12px;
}
.footer-brand p { font-size: 14px; line-height: 1.6; color: rgba(255,255,255,0.5); }
.footer-col h4 {
    font-size: 14px;
    color: #fff;
    margin-bottom: 16px;
    font-weight: 600;
    letter-spacing: 0.5px;
}
.footer-col a {
    display: block;
    font-size: 14px;
    color: rgba(255,255,255,0.5);
    padding: 4px 0;
    transition: var(--transition);
}
.footer-col a:hover { color: #fff; padding-left: 4px; }
.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: 13px;
    color: rgba(255,255,255,0.3);
}
.footer-bottom .links { display: flex; gap: 20px; }
.footer-bottom .links a { color: rgba(255,255,255,0.3); font-size: 13px; }
.footer-bottom .links a:hover { color: #fff; }

/* ===== 内容未找到 ===== */
.not-found-wrap {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 40px;
    text-align: center;
}
.not-found-wrap .icon {
    font-size: 64px;
    color: var(--text-muted);
    margin-bottom: 20px;
    opacity: 0.3;
}
.not-found-wrap h2 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 12px;
}
.not-found-wrap p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}
.not-found-wrap .btn-back {
    display: inline-block;
    padding: 12px 36px;
    background: var(--accent);
    color: #fff;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
}
.not-found-wrap .btn-back:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .article-hero { padding: 40px 24px 32px; min-height: 240px; }
    .article-hero h1 { font-size: 1.8rem; }
    .article-body-wrap { padding: 24px 20px 40px; }
    .article-body { padding: 28px 24px; font-size: 16px; }
    .article-nav { padding: 0 20px; grid-template-columns: 1fr; gap: 12px; }
    .related-section { padding: 40px 20px; }
    .related-grid { grid-template-columns: 1fr 1fr; }
    .article-cta { padding: 40px 20px; }
    .footer { padding: 40px 20px 24px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
    .article-hero-bg { opacity: 0.15; }
}

@media (max-width: 768px) {
    .article-hero h1 { font-size: 1.5rem; }
    .article-meta { gap: 12px; font-size: 13px; }
    .article-body { padding: 20px 16px; font-size: 15px; }
    .related-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}

@media (max-width: 520px) {
    .article-hero { padding: 32px 16px 24px; min-height: 200px; }
    .article-hero h1 { font-size: 1.25rem; }
    .article-body-wrap { padding: 16px 12px 32px; }
    .article-body { padding: 16px 12px; font-size: 14px; border-radius: var(--radius-md); }
    .article-nav { padding: 0 12px; }
    .related-section { padding: 32px 12px; }
    .article-cta { padding: 32px 12px; }
    .article-cta h2 { font-size: 1.3rem; }
    .footer { padding: 32px 12px 20px; }
    .not-found-wrap { padding: 60px 20px; }
    .not-found-wrap h2 { font-size: 1.4rem; }
}

/* ===== 移动端菜单按钮 ===== */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 1100;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: var(--primary);
    color: #fff;
    border: none;
    font-size: 20px;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}
.mobile-menu-toggle:hover { background: var(--primary-light); }
@media (max-width: 1024px) {
    .mobile-menu-toggle { display: flex; align-items: center; justify-content: center; }
}
.overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
}
.overlay.show { display: block; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #7c3aed;
            --primary-dark: #6d28d9;
            --primary-light: #a78bfa;
            --primary-bg: #f5f3ff;
            --secondary: #ec4899;
            --secondary-light: #fbcfe8;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --bg: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-dark-2: #1e293b;
            --text: #0f172a;
            --text-light: #475569;
            --text-muted: #94a3b8;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow: 0 4px 16px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12), 0 8px 24px rgba(0,0,0,0.06);
            --shadow-hover: 0 20px 60px rgba(124,58,237,0.16), 0 8px 28px rgba(0,0,0,0.08);
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --sidebar-width: 240px;
            --sidebar-collapsed: 72px;
            --header-height: 0px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            display: flex;
            min-height: 100vh;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: 1rem; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text); }
        h1 { font-size: 2.5rem; letter-spacing: -0.02em; }
        h2 { font-size: 2rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.375rem; }
        h4 { font-size: 1.125rem; }
        p { margin-bottom: 1rem; color: var(--text-light); }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Sidebar / Left Nav ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-card);
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition), width var(--transition);
            overflow-y: auto;
            overflow-x: hidden;
        }
        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 24px 20px 20px;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-brand .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.25rem;
            flex-shrink: 0;
        }
        .sidebar-brand .logo-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }
        .sidebar-nav {
            flex: 1;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav .nav-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--text-muted);
            padding: 12px 12px 6px;
            font-weight: 600;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            color: var(--text-light);
            font-weight: 500;
            font-size: 0.95rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .sidebar-nav a i { width: 20px; text-align: center; font-size: 1.1rem; color: var(--text-muted); transition: color var(--transition); }
        .sidebar-nav a:hover { background: var(--primary-bg); color: var(--primary); transform: translateX(2px); }
        .sidebar-nav a:hover i { color: var(--primary); }
        .sidebar-nav a.active { background: var(--primary-bg); color: var(--primary); font-weight: 600; }
        .sidebar-nav a.active i { color: var(--primary); }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-light);
            font-size: 0.75rem;
            color: var(--text-muted);
            text-align: center;
            white-space: nowrap;
        }

        /* ===== Main Content Area ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== Mobile Top Bar ===== */
        .mobile-topbar {
            display: none;
            position: sticky;
            top: 0;
            z-index: 999;
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            padding: 12px 20px;
            align-items: center;
            justify-content: space-between;
        }
        .mobile-topbar .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1rem;
        }
        .mobile-topbar .logo-text { font-weight: 700; font-size: 1.1rem; }
        .mobile-topbar .hamburger {
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 4px 8px;
            border-radius: var(--radius-sm);
        }
        .mobile-topbar .hamburger:focus-visible { outline: 2px solid var(--primary); }
        .sidebar-overlay { display: none; }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            padding: 80px 0 72px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-2) 100%);
            overflow: hidden;
            min-height: 340px;
            display: flex;
            align-items: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(124,58,237,0.3), transparent 70%);
        }
        .category-hero .container { position: relative; z-index: 2; text-align: center; }
        .category-hero h1 {
            font-size: 3rem;
            color: var(--text-white);
            margin-bottom: 12px;
            font-weight: 800;
            letter-spacing: -0.02em;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .category-hero p {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.75);
            max-width: 640px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(124,58,237,0.25);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(167,139,250,0.3);
            padding: 6px 20px;
            border-radius: 100px;
            color: var(--primary-light);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
        }
        .category-hero .hero-badge i { font-size: 0.75rem; }

        /* ===== Section General ===== */
        .section { padding: 72px 0; }
        .section-alt { background: var(--bg-card); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-dark h2, .section-dark h3, .section-dark .section-subtitle { color: var(--text-white); }
        .section-dark .section-subtitle { color: rgba(255,255,255,0.6); }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 48px;
            font-size: 1.05rem;
            line-height: 1.7;
        }
        .section-title-left { text-align: left; }
        .section-subtitle-left { text-align: left; margin-left: 0; }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
            display: flex;
            flex-direction: column;
        }
        .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .card-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block; }
        .card-body { padding: 20px 22px 24px; flex: 1; display: flex; flex-direction: column; }
        .card-body h3 { font-size: 1.15rem; margin-bottom: 8px; font-weight: 600; }
        .card-body h3 a { color: var(--text); }
        .card-body h3 a:hover { color: var(--primary); }
        .card-body p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 12px; flex: 1; line-height: 1.6; }
        .card-meta { display: flex; align-items: center; gap: 16px; font-size: 0.8rem; color: var(--text-muted); }
        .card-meta i { margin-right: 4px; }
        .card-tag {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 0.7rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 100px;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 10px;
            align-self: flex-start;
        }

        /* ===== Grid ===== */
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

        /* ===== Subcategory Pills ===== */
        .subcategory-pills {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-bottom: 40px;
        }
        .subcategory-pills a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            border-radius: 100px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            color: var(--text-light);
            font-size: 0.9rem;
            font-weight: 500;
            transition: all var(--transition);
        }
        .subcategory-pills a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(124,58,237,0.25); }
        .subcategory-pills a.active { background: var(--primary); color: #fff; border-color: var(--primary); }
        .subcategory-pills a i { font-size: 0.8rem; }

        /* ===== Stats / Numbers ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item { padding: 20px; }
        .stat-item .num { font-size: 2.5rem; font-weight: 800; color: var(--primary); line-height: 1.2; }
        .stat-item .label { font-size: 0.9rem; color: var(--text-muted); margin-top: 4px; }

        /* ===== Featured Article ===== */
        .featured-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .featured-card .featured-img { width: 100%; height: 100%; min-height: 320px; object-fit: cover; }
        .featured-card .featured-body { padding: 40px 40px 40px 0; display: flex; flex-direction: column; justify-content: center; }
        .featured-card .featured-body .card-tag { margin-bottom: 12px; }
        .featured-card .featured-body h2 { font-size: 1.75rem; margin-bottom: 12px; }
        .featured-card .featured-body p { font-size: 1rem; color: var(--text-light); margin-bottom: 20px; line-height: 1.7; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-sm); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
            gap: 16px;
        }
        .faq-question:hover { background: var(--primary-bg); }
        .faq-question i { color: var(--primary); font-size: 0.85rem; transition: transform var(--transition); flex-shrink: 0; }
        .faq-question.active i { transform: rotate(180deg); }
        .faq-answer { padding: 0 24px 18px; color: var(--text-light); font-size: 0.95rem; line-height: 1.7; display: none; }
        .faq-answer.open { display: block; }
        .faq-answer p:last-child { margin-bottom: 0; }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-box * { position: relative; z-index: 2; }
        .cta-box h2 { color: #fff; font-size: 2rem; margin-bottom: 12px; }
        .cta-box p { color: rgba(255,255,255,0.85); font-size: 1.1rem; max-width: 600px; margin: 0 auto 28px; }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: none;
            background: #fff;
            color: var(--primary);
        }
        .btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); background: #f8fafc; }
        .btn-outline { background: transparent; border: 2px solid rgba(255,255,255,0.4); color: #fff; }
        .btn-outline:hover { background: rgba(255,255,255,0.12); border-color: #fff; }
        .btn-group { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

        /* ===== Buttons general ===== */
        .btn-primary {
            background: var(--primary);
            color: #fff;
            padding: 10px 28px;
            border-radius: 100px;
            font-weight: 600;
            border: none;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(124,58,237,0.3); color: #fff; }
        .btn-secondary {
            background: var(--bg-card);
            color: var(--text);
            border: 1px solid var(--border);
            padding: 10px 28px;
            border-radius: 100px;
            font-weight: 600;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-secondary:hover { background: var(--primary-bg); border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: var(--text-white);
            padding: 56px 0 0;
            margin-top: auto;
        }
        .footer .container { padding: 0 24px; }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo-text { font-size: 1.3rem; font-weight: 700; color: #fff; display: block; margin-bottom: 12px; }
        .footer-brand p { color: rgba(255,255,255,0.5); font-size: 0.9rem; line-height: 1.7; max-width: 300px; }
        .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: 0.88rem;
            padding: 4px 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.8rem;
            color: rgba(255,255,255,0.35);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom .links { display: flex; gap: 20px; }
        .footer-bottom .links a { color: rgba(255,255,255,0.4); font-size: 0.8rem; }
        .footer-bottom .links a:hover { color: var(--primary-light); }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            padding: 20px 0 0;
        }
        .breadcrumb a { color: var(--text-muted); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { color: var(--text-light); font-weight: 500; }
        .breadcrumb i { font-size: 0.65rem; color: var(--text-muted); }

        /* ===== Load More ===== */
        .load-more { text-align: center; margin-top: 40px; }

        /* ===== Divider ===== */
        .divider { width: 60px; height: 3px; background: linear-gradient(90deg, var(--primary), var(--secondary)); border-radius: 4px; margin: 0 auto 12px; }
        .divider-left { margin-left: 0; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .featured-card { grid-template-columns: 1fr; }
            .featured-card .featured-body { padding: 24px; }
            .featured-card .featured-img { min-height: 240px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }

        @media (max-width: 768px) {
            .sidebar { transform: translateX(-100%); width: 280px; }
            .sidebar.open { transform: translateX(0); }
            .sidebar-overlay {
                display: none;
                position: fixed;
                inset: 0;
                background: rgba(0,0,0,0.5);
                z-index: 999;
                backdrop-filter: blur(4px);
            }
            .sidebar-overlay.open { display: block; }
            .mobile-topbar { display: flex; }
            .main-content { margin-left: 0; }
            .category-hero { padding: 60px 0 52px; min-height: 280px; }
            .category-hero h1 { font-size: 2rem; }
            .category-hero p { font-size: 1rem; }
            .grid-3 { grid-template-columns: 1fr; gap: 20px; }
            .grid-2 { grid-template-columns: 1fr; gap: 20px; }
            .grid-4 { grid-template-columns: 1fr; gap: 20px; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .section { padding: 48px 0; }
            .section-title { font-size: 1.5rem; }
            .cta-box { padding: 40px 24px; }
            .cta-box h2 { font-size: 1.5rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .subcategory-pills { gap: 8px; }
            .subcategory-pills a { padding: 6px 16px; font-size: 0.8rem; }
            .breadcrumb { padding: 16px 0 0; font-size: 0.8rem; }
        }

        @media (max-width: 520px) {
            .category-hero h1 { font-size: 1.6rem; }
            .category-hero p { font-size: 0.9rem; }
            .container { padding: 0 16px; }
            .card-body { padding: 16px 18px 20px; }
            .btn { padding: 10px 24px; font-size: 0.85rem; }
            .btn-group { flex-direction: column; align-items: center; }
            .stats-grid .num { font-size: 1.8rem; }
            .featured-card .featured-body h2 { font-size: 1.3rem; }
        }

        /* ===== Smooth fade-in ===== */
        .fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease, transform 0.6s ease; }
        .fade-in.visible { opacity: 1; transform: translateY(0); }