/* roulang page: index */
:root {
      --primary: #E53935;
      --primary-dark: #c62828;
      --primary-gradient: linear-gradient(135deg, #E53935 0%, #FF6F00 100%);
      --secondary: #1A237E;
      --secondary-light: #283593;
      --accent: #FFC107;
      --bg: #FAFAFA;
      --surface: #FFFFFF;
      --text-primary: #1A1A1A;
      --text-secondary: #5F6368;
      --border-light: #E8E8E8;
      --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.06);
      --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.12);
      --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.16);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --transition: all 0.25s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text-primary);
      line-height: 1.75;
      margin: 0;
      overflow-x: hidden;
    }

    h1, h2, h3, h4, h5, h6 {
      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 {
      width: 100%;
      max-width: 1320px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    @media (max-width: 1400px) {
      .container-custom {
        max-width: 1140px;
      }
    }

    @media (max-width: 1200px) {
      .container-custom {
        max-width: 960px;
        padding-left: 20px;
        padding-right: 20px;
      }
    }

    @media (max-width: 992px) {
      .container-custom {
        max-width: 720px;
      }
    }

    @media (max-width: 768px) {
      .container-custom {
        max-width: 100%;
        padding-left: 16px;
        padding-right: 16px;
      }
    }

    /* 按钮重置 */
    .btn-primary-custom {
      background: var(--primary-gradient);
      border: none;
      color: white;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      box-shadow: 0 4px 14px rgba(229, 57, 53, 0.3);
      display: inline-block;
      text-align: center;
      line-height: 1.2;
    }

    .btn-primary-custom:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(229, 57, 53, 0.45);
      color: white;
      background: linear-gradient(135deg, #c62828 0%, #e65100 100%);
    }

    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      display: inline-block;
      text-align: center;
      line-height: 1.2;
    }

    .btn-outline-custom:hover {
      background: rgba(229, 57, 53, 0.05);
      border-color: var(--primary-dark);
      color: var(--primary-dark);
      transform: translateY(-1px);
    }

    .btn-accent {
      background: var(--accent);
      border: none;
      color: #1A1A1A;
      font-weight: 700;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(255, 193, 7, 0.3);
    }

    .btn-accent:hover {
      background: #ffb300;
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(255, 193, 7, 0.45);
    }

    /* 导航 */
    .navbar-custom {
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
      padding: 12px 0;
      position: sticky;
      top: 0;
      z-index: 1020;
    }

    .navbar-brand-custom {
      font-weight: 800;
      font-size: 1.75rem;
      color: var(--primary) !important;
      letter-spacing: -0.02em;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .navbar-brand-custom i {
      font-size: 2rem;
      color: var(--primary);
    }

    .nav-link-custom {
      color: var(--text-primary) !important;
      font-weight: 500;
      margin: 0 8px;
      transition: var(--transition);
      border-bottom: 2px solid transparent;
      padding: 6px 4px;
    }

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

    .search-icon {
      font-size: 1.3rem;
      cursor: pointer;
      color: var(--text-secondary);
    }

    .search-icon:hover {
      color: var(--primary);
    }

    @media (max-width: 992px) {
      .navbar-collapse-custom {
        background: white;
        padding: 20px;
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-md);
        margin-top: 10px;
      }
    }

    /* Hero */
    .hero-section {
      min-height: 90vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, rgba(229, 57, 53, 0.03) 0%, rgba(255, 111, 0, 0.05) 100%);
      position: relative;
      overflow: hidden;
    }

    .hero-bg-pattern {
      position: absolute;
      right: 0;
      top: 0;
      width: 45%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.15;
      mask-image: linear-gradient(to left, black 40%, transparent 100%);
      -webkit-mask-image: linear-gradient(to left, black 40%, transparent 100%);
      z-index: 0;
    }

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

    .hero-title {
      font-size: 3.5rem;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 1.5rem;
    }

    .hero-title span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-sub {
      font-size: 1.25rem;
      color: var(--text-secondary);
      max-width: 600px;
      margin-bottom: 2rem;
    }

    .badge-card {
      background: white;
      border-radius: var(--radius-md);
      padding: 16px 20px;
      box-shadow: var(--shadow-sm);
      display: flex;
      align-items: center;
      gap: 12px;
      border-left: 5px solid var(--primary);
    }

    .badge-number {
      font-size: 2.5rem;
      font-weight: 900;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.5rem;
      }
      .hero-bg-pattern {
        width: 100%;
        opacity: 0.08;
      }
    }

    /* 卡片通用 */
    .card-custom {
      background: var(--surface);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border: 1px solid transparent;
      height: 100%;
    }

    .card-custom:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }

    .icon-gradient-bg {
      width: 48px;
      height: 48px;
      background: var(--primary-gradient);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 1.5rem;
    }

    .section-title {
      font-size: 2.25rem;
      font-weight: 700;
      margin-bottom: 1rem;
    }

    .dark-bg {
      background: var(--secondary);
      color: white;
      border-radius: var(--radius-lg);
      padding: 60px 0;
    }

    .testimonial-card {
      background: var(--surface);
      border-radius: var(--radius-md);
      padding: 24px;
      border-left: 6px solid var(--primary);
      box-shadow: var(--shadow-sm);
    }

    .accordion-button-custom {
      background: white;
      font-weight: 600;
      border: none;
      box-shadow: none;
      padding: 20px 24px;
      border-bottom: 1px solid var(--border-light);
      width: 100%;
      text-align: left;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: var(--transition);
    }

    .accordion-button-custom:hover {
      background: #f9f9f9;
    }

    .footer-dark {
      background: #0d1542;
      color: #ccc;
      padding: 60px 0 30px;
    }

    .footer-dark a {
      color: #bbb;
    }

    .footer-dark a:hover {
      color: white;
    }

    .social-icon-circle {
      width: 40px;
      height: 40px;
      border: 1px solid #555;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-right: 8px;
      color: #ccc;
      transition: var(--transition);
    }

    .social-icon-circle:hover {
      background: var(--primary);
      border-color: var(--primary);
      color: white;
    }