/* roulang page: index */
:root {
      --primary-green: #0A6E2E;
      --charcoal-dark: #1E1E1E;
      --accent-cyan: #00E676;
      --bg-white: #FFFFFF;
      --bg-light: #F5F6FA;
      --text-body: #333333;
      --text-muted: #666666;
      --text-light: #FFFFFF;
      --border-color: #E0E0E0;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 8px;
      --shadow-sm: 0 2px 16px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 28px rgba(0,0,0,0.12);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --font-mono: "DIN Alternate", "SF Mono", "Menlo", monospace;
      --transition-base: 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      color: var(--text-body);
      background-color: var(--bg-white);
      line-height: 1.7;
      font-size: 16px;
      margin: 0;
      padding-top: 72px;
    }

    h1, h2, h3, h4, h5, h6 {
      font-weight: 700;
      color: var(--charcoal-dark);
      line-height: 1.3;
    }

    h1 {
      font-size: 48px;
      font-weight: 700;
    }

    h2 {
      font-size: 36px;
      font-weight: 700;
      position: relative;
      display: inline-block;
      margin-bottom: 1.5rem;
    }

    h2::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -8px;
      width: 48px;
      height: 4px;
      background-color: var(--accent-cyan);
      border-radius: 2px;
    }

    .text-center h2::after {
      left: 50%;
      transform: translateX(-50%);
    }

    h3 {
      font-size: 22px;
      font-weight: 600;
        color: var(--charcoal-dark);
    }

    .data-number {
      font-family: var(--font-mono);
      font-size: 42px;
      font-weight: 700;
      color: var(--accent-cyan);
    }

    .section-padding {
      padding: 80px 0;
    }

    @media (max-width: 768px) {
      .section-padding {
        padding: 48px 0;
      }
      h1 {
        font-size: 32px;
      }
      h2 {
        font-size: 28px;
      }
      .data-number {
        font-size: 32px;
      }
    }

    /* 自定义导航 */
    .navbar-custom {
      background-color: var(--bg-white);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 1px 8px rgba(0,0,0,0.04);
      z-index: 1030;
      padding: 0.5rem 1rem;
    }

    .navbar-brand-custom {
      font-weight: 700;
      font-size: 22px;
      color: var(--primary-green) !important;
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
    }

    .navbar-brand-custom i {
      font-size: 28px;
      color: var(--primary-green);
    }

    .nav-link-custom {
      font-size: 15px;
      font-weight: 500;
      color: var(--charcoal-dark) !important;
      margin: 0 8px;
      padding: 0.5rem 0.75rem !important;
      position: relative;
      transition: color var(--transition-base);
    }

    .nav-link-custom:hover,
    .nav-link-custom.active {
      color: var(--primary-green) !important;
    }

    .nav-link-custom::after {
      content: '';
      position: absolute;
      left: 0.75rem;
      right: 0.75rem;
      bottom: 4px;
      height: 2px;
      background-color: var(--accent-cyan);
      transform: scaleX(0);
      transition: transform var(--transition-base);
    }

    .nav-link-custom:hover::after,
    .nav-link-custom.active::after {
      transform: scaleX(1);
    }

    .search-input {
      border-radius: 20px;
      border: 1px solid var(--border-color);
      padding: 0.4rem 1rem;
      font-size: 14px;
      width: 180px;
      outline: none;
      transition: border-color var(--transition-base), box-shadow var(--transition-base);
    }

    .search-input:focus {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 0 3px rgba(0,230,118,0.2);
    }

    .btn-primary-custom {
      background-color: var(--primary-green);
      border: none;
      color: white;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: background-color var(--transition-base), color var(--transition-base);
    }

    .btn-primary-custom:hover {
      background-color: var(--accent-cyan);
      color: var(--charcoal-dark);
    }

    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--charcoal-dark);
      color: var(--charcoal-dark);
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all var(--transition-base);
    }

    .btn-outline-custom:hover {
      background-color: var(--charcoal-dark);
      color: white;
    }

    .btn-neon {
      background-color: var(--accent-cyan);
      color: var(--charcoal-dark);
      border: none;
      font-weight: 700;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      transition: background-color var(--transition-base);
    }

    .btn-neon:hover {
      background-color: #00c853;
    }

    .card-custom {
      background: var(--bg-white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      border: none;
      transition: transform var(--transition-base), box-shadow var(--transition-base);
      height: 100%;
    }

    .card-custom:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    .card-img-top {
      border-top-left-radius: var(--radius-card);
      border-top-right-radius: var(--radius-card);
      height: 180px;
      object-fit: cover;
      background-color: #e9ecef;
    }

    .hero-section {
      background: linear-gradient(90deg, rgba(30,30,30,0.85) 0%, rgba(30,30,30,0.4) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      color: white;
      padding: 100px 0;
      display: flex;
      align-items: center;
    }

    .stat-box {
      background: rgba(255,255,255,0.1);
      backdrop-filter: blur(4px);
      border-radius: var(--radius-card);
      padding: 20px;
      text-align: center;
    }

    .dashboard-section {
      background-color: var(--bg-light);
    }

    .compare-section {
      background-color: var(--charcoal-dark);
      color: white;
    }

    .compare-item {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
      font-size: 16px;
    }

    .compare-section .left-col .compare-item i {
      color: #adb5bd;
    }

    .compare-section .right-col .compare-item i {
      color: var(--accent-cyan);
    }

    .accordion-button:not(.collapsed) {
      background-color: #fafafa;
      color: var(--charcoal-dark);
      font-weight: 600;
      box-shadow: none;
    }

    .accordion-button:focus {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 0 3px rgba(0,230,118,0.2);
    }

    .accordion-item {
      border: 1px solid var(--border-color);
      margin-bottom: 8px;
      border-radius: var(--radius-card) !important;
    }

    .form-control-custom {
      border-radius: var(--radius-input);
      border: 1px solid var(--border-color);
      padding: 12px 16px;
      font-size: 16px;
      transition: border-color var(--transition-base), box-shadow var(--transition-base);
    }

    .form-control-custom:focus {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 0 3px rgba(0,230,118,0.2);
    }

    footer {
      background-color: var(--charcoal-dark);
      color: rgba(255,255,255,0.8);
    }

    footer a {
      color: rgba(255,255,255,0.9);
      text-decoration: none;
      transition: color var(--transition-base);
    }

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

    .footer-brand {
      font-weight: 700;
      font-size: 20px;
      color: white;
    }

    .divider-cyan {
      width: 60px;
      height: 3px;
      background-color: var(--accent-cyan);
      margin: 16px 0;
    }

    @media (max-width: 768px) {
      .navbar-collapse {
        background: white;
        padding: 1rem;
        border-radius: 12px;
        box-shadow: var(--shadow-hover);
        margin-top: 0.5rem;
      }
    }