/* roulang page: index */
:root {
      --primary: #E32F21;
      --primary-hover: #C1271D;
      --secondary: #1A1A1A;
      --warm-bg: #FAF9F7;
      --accent-blue: #0A4C8A;
      --success-green: #0F9D58;
      --warning-yellow: #F4B400;
      --text-main: #333333;
      --text-muted: #666666;
      --text-light: #AAAAAA;
      --white: #FFFFFF;
      --border-light: #F0F0F0;
      --border-medium: #E0E0E0;
      --card-shadow: 0 4px 20px rgba(0,0,0,0.04);
      --card-shadow-hover: 0 12px 32px rgba(0,0,0,0.08);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 40px;
      --radius-btn: 50px;
      --container-max: 1200px;
      --section-gap: 120px;
      --card-padding: 32px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      background-color: var(--warm-bg);
      color: var(--text-main);
      line-height: 1.6;
      margin: 0;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, h5, h6 {
      font-weight: 600;
      color: var(--secondary);
      letter-spacing: -0.2px;
    }

    a {
      color: var(--accent-blue);
      text-decoration: none;
      transition: color 0.2s;
    }
    a:hover {
      color: var(--primary);
    }

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

    .container-custom {
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 16px;
      padding-right: 16px;
    }

    /* 浮动Dock导航 */
    .navbar-dock {
      position: fixed;
      top: 24px;
      left: 50%;
      transform: translateX(-50%);
      width: auto;
      max-width: 720px;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-radius: var(--radius-lg);
      border: 1px solid rgba(0,0,0,0.06);
      box-shadow: 0 8px 32px rgba(0,0,0,0.08);
      padding: 8px 16px;
      z-index: 1030;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: all 0.3s ease;
    }

    .navbar-dock .logo-text {
      font-weight: 700;
      font-size: 1.25rem;
      color: var(--secondary);
      letter-spacing: -0.3px;
      white-space: nowrap;
    }
    .navbar-dock .logo-text span {
      color: var(--primary);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 20px;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .nav-links a {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-main);
      padding: 6px 4px;
      transition: color 0.2s;
      white-space: nowrap;
    }
    .nav-links a:hover {
      color: var(--primary);
    }

    .btn-nav-cta {
      background: var(--primary);
      color: white !important;
      border-radius: var(--radius-btn);
      padding: 8px 20px;
      font-weight: 600;
      font-size: 0.9rem;
      transition: all 0.25s ease;
      border: none;
      white-space: nowrap;
    }
    .btn-nav-cta:hover {
      background: var(--primary-hover);
      transform: translateY(-1px);
      box-shadow: 0 6px 18px rgba(227,47,33,0.25);
      color: white;
    }

    /* 移动端底部Dock */
    @media (max-width: 575px) {
      .navbar-dock {
        top: auto;
        bottom: 16px;
        left: 4%;
        width: 92%;
        max-width: 100%;
        border-radius: 32px;
        padding: 10px 18px;
      }
      .navbar-dock .logo-text {
        display: none;
      }
      .nav-links {
        gap: 16px;
        flex: 1;
        justify-content: space-around;
      }
      .nav-links a {
        font-size: 0.85rem;
        padding: 4px;
      }
    }

    /* Hero */
    .hero-section {
      background-color: var(--secondary);
      min-height: 90vh;
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
    }
    .hero-bg-image {
      position: absolute;
      right: 0;
      top: 0;
      width: 40%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.35;
      mask-image: linear-gradient(to left, rgba(0,0,0,0.7), transparent);
      -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,0.7), transparent);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 600px;
      padding: 40px 0;
    }
    .hero-content h1 {
      font-size: 42px;
      line-height: 1.2;
      font-weight: 700;
      color: white;
      letter-spacing: -0.5px;
    }
    .hero-sub {
      font-size: 18px;
      color: #B0B0B0;
      margin: 20px 0 30px;
      line-height: 1.5;
    }
    .btn-primary-custom {
      background: var(--primary);
      border: none;
      color: white;
      font-weight: 600;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      transition: all 0.25s ease;
      display: inline-block;
      text-align: center;
    }
    .btn-primary-custom:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 10px 24px rgba(227,47,33,0.35);
      color: white;
    }
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 12px 34px;
      border-radius: var(--radius-btn);
      transition: all 0.25s ease;
    }
    .btn-outline-custom:hover {
      background: var(--primary);
      color: white;
      transform: translateY(-2px);
    }

    /* Section titles */
    .section-title h2 {
      font-size: 32px;
      font-weight: 600;
      margin-bottom: 12px;
      position: relative;
      display: inline-block;
    }
    .section-title h2::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 40px;
      height: 3px;
      background: var(--primary);
    }
    .text-center .section-title h2::after {
      left: 50%;
      transform: translateX(-50%);
    }

    /* 卡片样式 */
    .card-custom {
      background: var(--white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      box-shadow: var(--card-shadow);
      transition: all 0.3s ease;
      height: 100%;
    }
    .card-custom:hover {
      box-shadow: var(--card-shadow-hover);
      transform: translateY(-4px);
    }
    .card-img-top {
      border-radius: var(--radius-md) var(--radius-md) 0 0;
      height: 200px;
      object-fit: cover;
    }

    /* 优势不对称网格 */
    .advantage-item {
      display: flex;
      align-items: flex-start;
      gap: 20px;
      margin-bottom: 30px;
    }
    .advantage-icon {
      font-size: 2.2rem;
      color: var(--primary);
    }

    /* FAQ手风琴 */
    .accordion-button {
      background: #F5F5F5;
      border-radius: var(--radius-sm) !important;
      font-weight: 600;
      color: var(--secondary);
      box-shadow: none;
    }
    .accordion-button:not(.collapsed) {
      background: white;
      color: var(--primary);
      border: 1px solid var(--primary);
    }
    .accordion-button::after {
      transition: transform 0.3s;
    }

    /* CTA深色横幅 */
    .cta-dark {
      background: var(--secondary);
      border-radius: var(--radius-md);
      padding: 60px 40px;
      color: white;
    }

    /* Footer */
    .footer-custom {
      background: var(--secondary);
      color: var(--text-light);
      padding: 60px 0 20px;
    }
    .social-icons a {
      color: #AAA;
      font-size: 1.5rem;
      margin-right: 15px;
      transition: color 0.2s;
    }
    .social-icons a:hover {
      color: var(--primary);
    }

    @media (max-width: 768px) {
      .hero-content h1 {
        font-size: 32px;
      }
      .section-title h2 {
        font-size: 26px;
      }
      :root {
        --section-gap: 80px;
        --card-padding: 24px;
      }
    }