/* roulang page: index */
:root {
      --deep-purple-bg: #0D0B1A;
      --neon-cyan: #00F0C8;
      --vermillion-red: #D93B3B;
      --gold: #F0C060;
      --card-bg: #1A1728;
      --border-light: #2A2640;
      --text-white: #F2F0F8;
      --text-muted: #9B97B4;
      --font-title: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-body: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 6px;
      --shadow-card: 0 4px 24px rgba(0, 240, 200, 0.08);
      --shadow-hover: 0 8px 32px rgba(0, 240, 200, 0.18);
      --transition: all 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-body);
      background-color: var(--deep-purple-bg);
      color: var(--text-white);
      margin: 0;
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-title);
      letter-spacing: -0.5px;
      font-weight: 700;
    }

    h1 {
      font-size: 48px;
      font-weight: 800;
      color: var(--neon-cyan);
      line-height: 1.2;
    }

    h2 {
      font-size: 36px;
      margin-bottom: 1.5rem;
      color: var(--text-white);
      position: relative;
      display: inline-block;
    }

    h2::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -8px;
      width: 60px;
      height: 4px;
      background: var(--neon-cyan);
      border-radius: 2px;
      box-shadow: 0 0 12px var(--neon-cyan);
    }

    h3 {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-white);
      margin-bottom: 0.75rem;
    }

    .text-muted-custom {
      color: var(--text-muted) !important;
    }

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

    /* 导航 */
    .navbar-brand {
      font-family: var(--font-title);
      font-weight: 800;
      font-size: 1.8rem;
      background: linear-gradient(135deg, var(--neon-cyan) 0%, #7fffd4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: flex;
      align-items: center;
      gap: 6px;
      letter-spacing: 1px;
    }

    .navbar-brand i {
      background: none;
      -webkit-text-fill-color: var(--neon-cyan);
      font-size: 2rem;
    }

    .navbar {
      background-color: var(--deep-purple-bg);
      border-bottom: 1px solid var(--border-light);
      padding-top: 0;
      padding-bottom: 0;
    }

    .nav-link {
      color: var(--text-white) !important;
      font-weight: 500;
      padding: 0.6rem 1.2rem;
      border-radius: 30px;
      transition: var(--transition);
      white-space: nowrap;
    }

    .nav-link:hover {
      color: var(--neon-cyan) !important;
      border: 1px solid var(--neon-cyan);
      background: transparent;
    }

    .nav-link.active {
      background-color: var(--neon-cyan);
      color: var(--deep-purple-bg) !important;
      font-weight: 700;
      border: 1px solid var(--neon-cyan);
    }

    .channel-tabs {
      background-color: var(--deep-purple-bg);
      border-bottom: 1px solid var(--border-light);
      overflow-x: auto;
      white-space: nowrap;
      display: flex;
      flex-wrap: nowrap;
      padding: 0.5rem 0;
    }

    .channel-tabs::-webkit-scrollbar {
      height: 2px;
      background: transparent;
    }

    .channel-tabs::-webkit-scrollbar-thumb {
      background: var(--neon-cyan);
      border-radius: 2px;
    }

    .btn-primary-custom {
      background: var(--neon-cyan);
      border: none;
      color: var(--deep-purple-bg);
      font-weight: 700;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-size: 15px;
      letter-spacing: 0.5px;
      transition: var(--transition);
      box-shadow: 0 0 12px rgba(0,240,200,0.4);
    }

    .btn-primary-custom:hover {
      background: #00e6b8;
      box-shadow: 0 0 24px rgba(0,240,200,0.7);
      transform: scale(1.03);
      color: var(--deep-purple-bg);
    }

    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--vermillion-red);
      color: var(--vermillion-red);
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-size: 15px;
      transition: var(--transition);
    }

    .btn-outline-custom:hover {
      background: var(--vermillion-red);
      color: white;
      border-color: var(--vermillion-red);
    }

    /* Hero */
    .hero-section {
      padding: 80px 0 80px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      background-blend-mode: overlay;
      background-color: rgba(13, 11, 26, 0.75);
    }

    .hero-image-wrapper {
      border-radius: 20px;
      overflow: hidden;
      box-shadow: 0 0 40px rgba(0,240,200,0.4);
      border: 1px solid rgba(0,240,200,0.3);
      background: #1a1728;
    }

    .data-badge .number {
      font-family: 'DIN', 'PingFang SC', sans-serif;
      font-weight: 700;
      color: var(--gold);
      font-size: 1.8rem;
    }

    /* 亮点网格 */
    .highlight-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 2rem 1.5rem;
      border: 1px solid rgba(0,240,200,0.15);
      transition: var(--transition);
      box-shadow: var(--shadow-card);
      height: 100%;
    }

    .highlight-card:hover {
      border-color: var(--neon-cyan);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    .highlight-card.short {
      padding: 1.5rem;
    }

    .icon-neon {
      color: var(--neon-cyan);
      font-size: 2rem;
      margin-bottom: 1rem;
    }

    /* 案例瀑布 */
    .masonry-grid {
      column-count: 3;
      column-gap: 20px;
    }

    .masonry-item {
      break-inside: avoid;
      margin-bottom: 20px;
      background: var(--card-bg);
      border-radius: var(--radius-card);
      overflow: hidden;
      border: 1px solid rgba(0,240,200,0.15);
      transition: var(--transition);
    }

    .masonry-item:hover {
      border-color: var(--neon-cyan);
      box-shadow: var(--shadow-hover);
    }

    .masonry-item img {
      width: 100%;
      display: block;
      transition: transform 0.3s;
    }

    .masonry-item:hover img {
      transform: scale(1.03);
    }

    .tag-pill {
      background: var(--vermillion-red);
      color: white;
      border-radius: 20px;
      padding: 2px 12px;
      font-size: 0.75rem;
      font-weight: 600;
      display: inline-block;
    }

    .gold-data {
      color: var(--gold);
      font-weight: 700;
    }

    .floating-cta {
      background: rgba(13, 11, 26, 0.9);
      backdrop-filter: blur(8px);
      border-top: 1px solid var(--neon-cyan);
      color: var(--neon-cyan);
    }

    /* 对比表 */
    .compare-table {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      overflow: hidden;
    }

    .compare-header {
      background: var(--neon-cyan);
      color: var(--deep-purple-bg);
      font-weight: 800;
      padding: 1.2rem;
    }

    .compare-row {
      display: flex;
      border-bottom: 1px solid var(--border-light);
    }

    .compare-cell {
      flex: 1;
      padding: 1rem 1.5rem;
      display: flex;
      align-items: center;
    }

    .compare-divider {
      width: 2px;
      background: linear-gradient(to bottom, var(--neon-cyan), transparent);
    }

    /* FAQ */
    .accordion-button {
      background: var(--card-bg);
      color: var(--text-white);
      font-weight: 600;
      border: none;
      box-shadow: none;
      padding: 1.2rem 1.5rem;
      border-left: 4px solid transparent;
      transition: var(--transition);
    }

    .accordion-button:not(.collapsed) {
      background: #1f1b30;
      color: var(--neon-cyan);
      border-left: 4px solid var(--neon-cyan);
      box-shadow: 0 0 12px rgba(0,240,200,0.3);
    }

    .accordion-item {
      background: transparent;
      border: none;
      border-bottom: 1px solid var(--border-light);
    }

    .accordion-body {
      background: var(--card-bg);
      color: var(--text-muted);
      font-size: 15px;
    }

    /* CTA 横幅 */
    .cta-banner {
      background: var(--deep-purple-bg);
      background-image: radial-gradient(circle at 30% 30%, rgba(0,240,200,0.08) 0%, transparent 50%);
      position: relative;
    }

    .footer {
      background: var(--deep-purple-bg);
      border-top: 1px solid var(--border-light);
    }

    .footer a {
      color: var(--text-muted);
      text-decoration: none;
    }

    .footer a:hover {
      color: var(--neon-cyan);
    }

    .social-icon {
      width: 40px;
      height: 40px;
      border: 2px solid var(--neon-cyan);
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--neon-cyan);
      transition: var(--transition);
    }

    .social-icon:hover {
      background: var(--neon-cyan);
      color: var(--deep-purple-bg);
    }

    @media (max-width: 991px) {
      h1 {
        font-size: 38px;
      }
      .masonry-grid {
        column-count: 2;
      }
      .hero-section .row {
        flex-direction: column;
      }
    }

    @media (max-width: 767px) {
      h1 {
        font-size: 32px;
      }
      h2 {
        font-size: 28px;
      }
      .masonry-grid {
        column-count: 1;
      }
      .compare-row {
        flex-direction: column;
      }
      .compare-divider {
        display: none;
      }
      .channel-tabs {
        justify-content: flex-start;
      }
    }