/* roulang page: index */
:root {
      --primary-dark: #0A0E27;
      --accent-cyan: #00F0FF;
      --accent-magenta: #FF3CAC;
      --neutral-light: #F4F6FC;
      --card-deep: #1A1F3A;
      --text-muted: #8E94B2;
      --border-glow: rgba(0, 240, 255, 0.15);
      --border-strong: rgba(0, 240, 255, 0.25);
      --shadow-card: 0 0 0 1px rgba(0,240,255,0.08), 0 8px 32px rgba(0,0,0,0.4);
      --shadow-hover: 0 0 0 1px rgba(0,240,255,0.25), 0 12px 40px rgba(0,0,0,0.6);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-dashboard: 16px;
      --font-heading: 'Inter', 'Roboto', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      --font-mono: 'SF Mono', 'Consolas', 'Menlo', monospace;
      --spacing-unit: 8px;
      --transition-smooth: 0.25s ease-out;
      --backdrop-blur: blur(24px);
    }

    * {
      box-sizing: border-box;
    }

    body {
      background-color: var(--primary-dark);
      color: var(--text-muted);
      font-family: var(--font-heading);
      line-height: 1.6;
      margin: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, .h1, .h2, .h3, .h4 {
      font-family: var(--font-heading);
      font-weight: 700;
      letter-spacing: -0.02em;
    }

    .container {
      max-width: 1320px;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 导航栏双层结构 */
    .navbar-custom {
      background: rgba(10, 14, 39, 0.8);
      backdrop-filter: var(--backdrop-blur);
      -webkit-backdrop-filter: var(--backdrop-blur);
      border-bottom: 1px solid rgba(0, 240, 255, 0.1);
      position: sticky;
      top: 0;
      z-index: 1020;
      padding: 0;
    }

    .brand-logo {
      font-family: var(--font-heading);
      font-weight: 800;
      font-size: 1.6rem;
      background: linear-gradient(135deg, #00F0FF 0%, #FFFFFF 90%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: 1px;
    }

    .btn-gradient-cta {
      background: linear-gradient(135deg, #FF3CAC, #00F0FF);
      border: none;
      color: white;
      font-weight: 600;
      padding: 0.6rem 1.8rem;
      border-radius: var(--radius-btn);
      transition: all 0.3s ease;
      box-shadow: 0 4px 12px rgba(255, 60, 172, 0.3);
    }

    .btn-gradient-cta:hover {
      background: linear-gradient(135deg, #FF3CAC 0%, #00F0FF 70%);
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
      transform: scale(1.02);
      color: white;
    }

    .channel-tabs {
      display: flex;
      flex-wrap: nowrap;
      overflow-x: auto;
      gap: 4px;
      padding: 0.5rem 0;
      scrollbar-width: thin;
      scrollbar-color: var(--accent-cyan) transparent;
    }

    .channel-tabs::-webkit-scrollbar {
      height: 4px;
    }
    .channel-tabs::-webkit-scrollbar-thumb {
      background: var(--accent-cyan);
      border-radius: 4px;
    }

    .channel-pill {
      background: transparent;
      color: var(--text-muted);
      border: none;
      padding: 0.5rem 1.2rem;
      border-radius: 50px;
      font-weight: 500;
      white-space: nowrap;
      transition: all 0.2s;
      position: relative;
      text-decoration: none;
    }

    .channel-pill.active {
      background: var(--accent-cyan);
      color: #0A0E27;
      font-weight: 600;
    }

    .channel-pill:hover:not(.active) {
      color: white;
      text-decoration: none;
    }

    .channel-pill::after {
      content: '';
      position: absolute;
      bottom: 2px;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 2px;
      background: var(--accent-cyan);
      transition: width 0.2s;
    }

    .channel-pill:hover::after {
      width: 60%;
    }

    /* Hero */
    .hero-section {
      padding: 4rem 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }

    .hero-overlay {
      background: rgba(10, 14, 39, 0.75);
      backdrop-filter: blur(4px);
      width: 100%;
      height: 100%;
      position: absolute;
      top: 0;
      left: 0;
    }

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

    .hero-title {
      font-size: 3.5rem;
      font-weight: 800;
      background: linear-gradient(to right, #00F0FF, #FFFFFF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .dynamic-card {
      background: rgba(26, 31, 58, 0.8);
      backdrop-filter: blur(12px);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-dashboard);
      padding: 1.2rem;
      color: white;
      text-align: center;
    }

    .pulse-number {
      font-family: var(--font-mono);
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent-cyan);
      text-shadow: 0 0 12px rgba(0,240,255,0.5);
    }

    /* 通用卡片 */
    .section-title {
      font-size: 2.2rem;
      color: white;
      margin-bottom: 2rem;
      border-left: 5px solid var(--accent-cyan);
      padding-left: 1.2rem;
    }

    .deep-card {
      background: var(--card-deep);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
    }

    .deep-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
      border-color: var(--border-strong);
    }

    .stat-number {
      font-family: var(--font-mono);
      font-size: 3rem;
      font-weight: 700;
      color: var(--accent-cyan);
    }

    .trend-up {
      color: #FF3CAC;
    }
    .trend-down {
      color: #00F0FF;
    }

    .service-icon {
      font-size: 2.2rem;
      color: var(--accent-cyan);
    }

    .progress-custom {
      background: #1A1F3A;
      height: 8px;
      border-radius: 4px;
    }
    .progress-bar-cyan {
      background: linear-gradient(90deg, #00F0FF, #00C8D7);
    }

    .accordion-button.custom-accordion {
      background: var(--card-deep);
      color: white;
      font-weight: 600;
      border: none;
      box-shadow: none;
    }
    .accordion-button.custom-accordion:not(.collapsed) {
      background: #0A0E27;
      color: var(--accent-cyan);
      border-left: 4px solid var(--accent-cyan);
    }
    .accordion-body {
      background: #1A1F3A;
      color: var(--text-muted);
    }

    .form-control-dark {
      background: #0A0E27;
      border: 1px solid #2A2F4A;
      color: white;
      border-radius: var(--radius-btn);
      padding: 0.8rem;
    }
    .form-control-dark:focus {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 12px rgba(0,240,255,0.4);
    }

    footer {
      background: #0A0E27;
      border-top: 1px solid rgba(0,240,255,0.15);
      color: var(--text-muted);
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .stat-number {
        font-size: 2rem;
      }
      .channel-tabs {
        gap: 2px;
      }
    }