/* roulang page: index */
:root {
      --primary-deep: #0A0E27;
      --accent-cyan: #00F0FF;
      --accent-red: #FF4655;
      --bg-light: #F4F6F9;
      --white: #FFFFFF;
      --text-dark: #1A1A2E;
      --text-muted: #5A5A72;
      --border-light: #E0E4EC;
      --card-shadow: 0 8px 28px rgba(10, 14, 39, 0.05);
      --card-hover-shadow: 0 16px 38px rgba(0, 240, 255, 0.12);
      --radius-card: 16px;
      --radius-btn: 50px;
      --radius-input: 8px;
      --transition: all 0.25s ease;
      --font-sans: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-dark);
      margin: 0;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 700;
      letter-spacing: -0.02em;
    }

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

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 导航分段标签风格 */
    .navbar-custom {
      background-color: rgba(10, 14, 39, 0.92);
      backdrop-filter: blur(12px);
      padding: 1rem 0;
      position: sticky;
      top: 0;
      z-index: 1020;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .nav-logo {
      font-size: 1.8rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--white);
      background: linear-gradient(135deg, #FFFFFF 0%, #00F0FF 90%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: inline-block;
    }

    .nav-chip {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: rgba(255, 255, 255, 0.8);
      padding: 0.5rem 1.4rem;
      border-radius: 50px;
      font-weight: 500;
      font-size: 0.9rem;
      transition: var(--transition);
      margin: 0 4px;
    }

    .nav-chip.active, .nav-chip:hover {
      background: var(--accent-cyan);
      border-color: var(--accent-cyan);
      color: var(--primary-deep);
      font-weight: 600;
      box-shadow: 0 0 18px rgba(0, 240, 255, 0.5);
    }

    .btn-primary-cyan {
      background: var(--accent-cyan);
      border: 2px solid var(--accent-cyan);
      color: var(--primary-deep);
      font-weight: 700;
      padding: 0.7rem 2.2rem;
      border-radius: var(--radius-btn);
      letter-spacing: 0.3px;
      transition: var(--transition);
      box-shadow: 0 4px 14px rgba(0, 240, 255, 0.3);
    }

    .btn-primary-cyan:hover {
      background: transparent;
      color: var(--accent-cyan);
      box-shadow: 0 8px 22px rgba(0, 240, 255, 0.5);
      border-color: var(--accent-cyan);
    }

    .btn-outline-cyan {
      background: transparent;
      border: 2px solid var(--accent-cyan);
      color: var(--accent-cyan);
      font-weight: 600;
      padding: 0.7rem 2.2rem;
      border-radius: var(--radius-btn);
      transition: var(--transition);
    }

    .btn-outline-cyan:hover {
      background: rgba(0, 240, 255, 0.1);
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
    }

    .btn-danger-red {
      background: var(--accent-red);
      border: none;
      color: white;
      font-weight: 700;
      padding: 0.8rem 2.4rem;
      border-radius: var(--radius-btn);
      transition: var(--transition);
      box-shadow: 0 6px 16px rgba(255, 70, 85, 0.35);
    }

    .btn-danger-red:hover {
      background: #ff5e6b;
      box-shadow: 0 10px 24px rgba(255, 70, 85, 0.5);
      color: white;
    }

    /* Hero区域 */
    .hero-section {
      background: radial-gradient(circle at 20% 20%, #1a1f3a, var(--primary-deep));
      position: relative;
      overflow: hidden;
      padding: 4rem 0;
    }

    .hero-bg-img {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.3;
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: 0;
    }

    .stat-highlight {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--accent-cyan);
      line-height: 1.2;
      text-shadow: 0 0 15px rgba(0,240,255,0.4);
    }

    /* 非对称亮点网格 */
    .highlight-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .highlight-item {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 2rem 1.8rem;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      border: 1px solid rgba(10,14,39,0.04);
    }

    .highlight-item:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-hover-shadow);
      border-color: rgba(0,240,255,0.25);
    }

    .highlight-number {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--accent-cyan);
      display: block;
    }

    /* 案例瀑布流卡片 */
    .case-card {
      background: var(--white);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      position: relative;
    }

    .case-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--card-hover-shadow);
    }

    .case-img-wrapper {
      position: relative;
      overflow: hidden;
      height: 220px;
    }

    .case-img-wrapper img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: 0.4s ease;
    }

    .case-card:hover .case-img-wrapper img {
      transform: scale(1.05);
    }

    .case-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(180deg, transparent 50%, rgba(0,240,255,0.8));
      opacity: 0;
      transition: 0.3s;
      display: flex;
      align-items: flex-end;
      padding: 1rem;
    }

    .case-card:hover .case-overlay {
      opacity: 1;
    }

    .tag-badge {
      background: rgba(10,14,39,0.1);
      color: var(--primary-deep);
      padding: 0.25rem 1rem;
      border-radius: 50px;
      font-size: 0.8rem;
      font-weight: 600;
    }

    /* 方案对比表 */
    .compare-table {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--card-shadow);
    }

    .compare-header {
      background: var(--primary-deep);
      color: white;
      font-weight: 700;
    }

    .compare-col-highlight {
      background: rgba(0,240,255,0.03);
      border-left: 2px solid var(--accent-cyan);
    }

    /* FAQ手风琴 */
    .accordion-button:not(.collapsed) {
      background-color: rgba(0,240,255,0.08);
      color: var(--primary-deep);
      font-weight: 600;
      box-shadow: none;
      border-left: 4px solid var(--accent-cyan);
    }

    .accordion-button:focus {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 0 0.2rem rgba(0,240,255,0.2);
    }

    /* 表单 */
    .form-control {
      border-radius: var(--radius-input);
      border: 1px solid var(--border-light);
      padding: 0.7rem 1rem;
    }

    .form-control:focus {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 0 0.2rem rgba(0,240,255,0.25);
    }

    footer {
      background: var(--primary-deep);
      color: rgba(255,255,255,0.75);
    }

    @media (max-width: 992px) {
      .highlight-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .navbar-custom .nav-chips {
        flex-wrap: wrap;
        justify-content: center;
        margin: 12px 0;
      }
    }

    @media (max-width: 768px) {
      .highlight-grid {
        grid-template-columns: 1fr;
      }
      .hero-section .row {
        flex-direction: column-reverse;
      }
      .stat-highlight {
        font-size: 2rem;
      }
      h1 {
        font-size: 2.5rem;
      }
      .navbar-custom {
        padding: 0.8rem 0;
      }
    }