/* roulang page: index */
:root {
      --deep-purple-black: #0B0A1A;
      --surface-dark: #100E24;
      --card-bg: rgba(255, 255, 255, 0.04);
      --card-border: rgba(255, 255, 255, 0.06);
      --primary-volet: #8B5CF6;
      --primary-volet-hover: #A855F7;
      --accent-cyan: #00E5BF;
      --accent-amber: #F59E0B;
      --text-primary: #FFFFFF;
      --text-secondary: rgba(255, 255, 255, 0.75);
      --text-muted: rgba(255, 255, 255, 0.5);
      --border-light: rgba(255, 255, 255, 0.1);
      --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.6);
      --shadow-glow: 0 8px 32px rgba(139, 92, 246, 0.3);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 6px;
      --font-heading: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --font-number: 'Rajdhani', 'Inter', sans-serif;
      --transition-base: all 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      background-color: var(--deep-purple-black);
      color: var(--text-secondary);
      font-family: var(--font-heading);
      font-size: 16px;
      line-height: 1.75;
      margin: 0;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-family: var(--font-heading);
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: -0.01em;
    }
    
    a {
      color: var(--accent-cyan);
      text-decoration: none;
      transition: var(--transition-base);
    }
    a:hover {
      color: #33FFCC;
      text-decoration: underline;
    }
    
    /* 容器微调 */
    .container {
      max-width: 1320px;
    }
    
    /* 导航栏 - 杂志频道式 */
    .navbar {
      background-color: rgba(11, 10, 26, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255,255,255,0.08);
      padding: 0;
      transition: background 0.3s;
    }
    .navbar.scrolled {
      background-color: rgba(11, 10, 26, 0.95);
    }
    .brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
    }
    .navbar-brand {
      font-family: var(--font-heading);
      font-weight: 800;
      font-size: 1.8rem;
      color: var(--primary-volet) !important;
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .navbar-brand i {
      font-size: 2rem;
      color: var(--accent-cyan);
    }
    .channel-row {
      border-top: 1px solid rgba(255,255,255,0.05);
      padding: 8px 0;
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      align-items: center;
      overflow-x: auto;
      white-space: nowrap;
    }
    .channel-link {
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 6px 14px;
      border-radius: 20px;
      transition: var(--transition-base);
      text-decoration: none;
      display: inline-block;
    }
    .channel-link:hover, .channel-link.active {
      color: var(--primary-volet);
      background: rgba(139,92,246,0.1);
      text-decoration: none;
    }
    .nav-cta-btn {
      background: var(--primary-volet);
      color: white;
      border-radius: 20px;
      padding: 8px 18px;
      font-weight: 600;
      font-size: 0.9rem;
      text-decoration: none;
      transition: var(--transition-base);
      border: none;
    }
    .nav-cta-btn:hover {
      background: var(--primary-volet-hover);
      box-shadow: 0 0 15px rgba(139,92,246,0.5);
      color: white;
      text-decoration: none;
    }
    .navbar-toggler {
      border-color: rgba(255,255,255,0.2);
      color: white;
    }
    .navbar-toggler-icon {
      background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255, 255, 255, 0.7)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
    }
    
    /* 按钮系统 */
    .btn-primary-custom {
      background: var(--primary-volet);
      color: white;
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 12px 28px;
      border: none;
      transition: var(--transition-base);
      box-shadow: 0 4px 12px rgba(139,92,246,0.3);
      display: inline-block;
      text-decoration: none;
    }
    .btn-primary-custom:hover {
      background: var(--primary-volet-hover);
      box-shadow: 0 8px 20px rgba(139,92,246,0.5);
      color: white;
      transform: translateY(-2px);
      text-decoration: none;
    }
    .btn-outline-accent {
      background: transparent;
      border: 1.5px solid var(--primary-volet);
      color: var(--primary-volet);
      font-weight: 600;
      border-radius: var(--radius-btn);
      padding: 12px 28px;
      transition: var(--transition-base);
      display: inline-block;
      text-decoration: none;
    }
    .btn-outline-accent:hover {
      background: rgba(139,92,246,0.1);
      border-color: var(--primary-volet-hover);
      color: white;
      text-decoration: none;
    }
    .btn-amber {
      background: var(--accent-amber);
      color: #0B0A1A;
      font-weight: 700;
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      border: none;
      transition: var(--transition-base);
    }
    .btn-amber:hover {
      background: #FBBF24;
      color: #0B0A1A;
      box-shadow: 0 0 20px rgba(245,158,11,0.5);
    }
    
    /* 板块通用 */
    section {
      padding: 90px 0;
      position: relative;
    }
    .section-dark {
      background-color: var(--deep-purple-black);
    }
    .section-slightly-light {
      background-color: rgba(255,255,255,0.02);
    }
    
    /* Hero 区域 */
    .hero-section {
      min-height: 90vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 30% 40%, rgba(139,92,246,0.12) 0%, transparent 50%);
      position: relative;
      overflow: hidden;
    }
    .hero-bg-lines {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 800"><path d="M0 400 L400 100 L800 600 L1200 200" stroke="rgba(139,92,246,0.15)" fill="none" stroke-width="2"/><circle cx="600" cy="400" r="300" stroke="rgba(0,229,191,0.08)" fill="none" stroke-width="1"/></svg>') no-repeat center;
      opacity: 0.5;
      pointer-events: none;
    }
    .hero-title {
      font-size: 3.4rem;
      font-weight: 800;
      line-height: 1.2;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-secondary);
    }
    
    /* 卡片样式 */
    .card-custom {
      background: var(--card-bg);
      backdrop-filter: blur(8px);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: var(--transition-base);
      color: var(--text-secondary);
      height: 100%;
    }
    .card-custom:hover {
      border-color: var(--primary-volet);
      box-shadow: var(--shadow-glow);
      transform: translateY(-4px);
    }
    .icon-glow {
      color: var(--accent-cyan);
      font-size: 2.2rem;
    }
    
    /* 数字统计 */
    .stat-number {
      font-family: var(--font-number);
      font-size: 3.2rem;
      font-weight: 700;
      color: var(--accent-cyan);
    }
    
    /* 证言卡片 */
    .testimonial-card {
      background: rgba(255,255,255,0.03);
      border-left: 4px solid var(--primary-volet);
      border-radius: 8px;
      padding: 20px;
    }
    
    /* FAQ 手风琴重写 */
    .accordion-button {
      background: rgba(255,255,255,0.04);
      color: white;
      font-weight: 600;
      border: 1px solid transparent;
    }
    .accordion-button:not(.collapsed) {
      background: rgba(139,92,246,0.1);
      color: white;
      border-color: var(--primary-volet);
    }
    .accordion-item {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.05);
      margin-bottom: 12px;
      border-radius: 8px;
    }
    
    /* CTA 区域 */
    .cta-full {
      background: linear-gradient(135deg, #2D1B5A 0%, #0B0A1A 100%);
    }
    
    footer {
      background: #06050F;
      color: var(--text-muted);
      font-size: 0.9rem;
    }
    
    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.4rem;
      }
      section {
        padding: 60px 0;
      }
      .channel-row {
        flex-wrap: nowrap;
      }
    }