/* roulang page: index */
:root {
      --primary: #0A2540;
      --secondary: #C9A96E;
      --accent: #D4AF37;
      --bg: #F8F9FA;
      --card-bg: #FFFFFF;
      --text: #1E1E1E;
      --text-secondary: #5A5A5A;
      --radius: 12px;
      --shadow: 0 4px 20px rgba(10,37,64,0.08);
      --shadow-hover: 0 8px 30px rgba(10,37,64,0.12);
      --transition: 0.25s ease;
      --section-padding: 80px 0;
      --container-max: 1200px;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: 'Inter', 'Noto Sans SC', 'PingFang SC', sans-serif;
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.6;
      scroll-behavior: smooth;
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    h1, h2, h3 {
      font-family: 'Noto Serif SC', 'Source Han Serif SC', serif;
      font-weight: 600;
    }

    h1 {
      font-size: 3rem;
      line-height: 1.2;
    }

    h2 {
      font-size: 2.25rem;
      margin-bottom: 24px;
      color: var(--primary);
      position: relative;
      display: inline-block;
    }

    h2::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -6px;
      width: 48px;
      height: 3px;
      background: var(--accent);
    }

    h3 {
      font-size: 1.5rem;
      color: var(--primary);
      margin-bottom: 12px;
    }

    p {
      color: var(--text-secondary);
      font-size: 1rem;
      margin-bottom: 16px;
    }

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

    a:hover {
      color: var(--secondary);
    }

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      font-size: 1rem;
      border: none;
      background: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all var(--transition);
    }

    .btn-primary {
      background: var(--primary);
      color: #FFFFFF;
      padding: 14px 32px;
      border-radius: 8px;
      font-weight: 600;
      box-shadow: 0 4px 12px rgba(10,37,64,0.2);
    }

    .btn-primary:hover {
      background: var(--secondary);
      color: var(--primary);
      transform: translateY(-1px);
      box-shadow: 0 8px 20px rgba(10,37,64,0.25);
    }

    .btn-outline {
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 14px 32px;
      border-radius: 8px;
      font-weight: 600;
      background: transparent;
    }

    .btn-outline:hover {
      background: var(--primary);
      color: #FFFFFF;
    }

    .btn-accent {
      background: var(--accent);
      color: var(--primary);
      padding: 14px 32px;
      border-radius: 8px;
      font-weight: 700;
      letter-spacing: 0.5px;
      box-shadow: 0 4px 15px rgba(212,175,55,0.4);
    }

    .btn-accent:hover {
      background: var(--secondary);
      color: #0A2540;
      transform: scale(1.02);
    }

    /* 导航 */
    header {
      position: fixed;
      top: 0;
      width: 100%;
      background: #FFFFFF;
      z-index: 999;
      height: 72px;
      border-bottom: 1px solid rgba(0,0,0,0.05);
      transition: box-shadow 0.2s;
    }

    header.shadow {
      box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 100%;
    }

    .logo {
      font-family: 'Noto Serif SC', serif;
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .logo .logo-icon {
      color: var(--accent);
      font-size: 1.8rem;
    }

    nav a {
      margin-left: 32px;
      font-weight: 500;
      color: var(--text);
      position: relative;
      padding-bottom: 6px;
      font-size: 1rem;
    }

    nav a.active {
      color: var(--primary);
      font-weight: 600;
    }

    nav a.active::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--accent);
      border-radius: 2px;
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
    }

    .hamburger span {
      width: 28px;
      height: 3px;
      background: var(--primary);
      border-radius: 2px;
      transition: 0.3s;
    }

    .mobile-nav {
      display: none;
    }

    /* 首屏 */
    .hero {
      padding: 120px 0 80px;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, #FFFFFF 0%, #F8F9FA 100%);
      position: relative;
      overflow: hidden;
    }

    .hero::before {
      content: '';
      position: absolute;
      right: -60px;
      top: -60px;
      width: 450px;
      height: 450px;
      background: radial-gradient(circle at 30% 40%, rgba(201,169,110,0.08) 0%, transparent 70%);
      border-radius: 50%;
    }

    .hero-content {
      display: grid;
      grid-template-columns: 1.2fr 0.9fr;
      gap: 50px;
      align-items: center;
    }

    .hero-text h1 {
      margin-bottom: 20px;
      font-size: 3.2rem;
    }

    .hero-text .sub {
      font-size: 1.15rem;
      color: var(--text-secondary);
      margin-bottom: 30px;
      max-width: 480px;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .stats-board {
      display: flex;
      flex-direction: column;
      gap: 24px;
      background: rgba(255,255,255,0.8);
      backdrop-filter: blur(4px);
      border-radius: 20px;
      padding: 28px;
      box-shadow: var(--shadow);
      border: 1px solid rgba(10,37,64,0.05);
    }

    .stat-item {
      display: flex;
      flex-direction: column;
      border-bottom: 1px solid #eee;
      padding-bottom: 12px;
    }

    .stat-item:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }

    .stat-number {
      font-size: 2.4rem;
      font-weight: 700;
      color: var(--accent);
      font-family: 'Noto Serif SC', serif;
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--text-secondary);
    }

    .section {
      padding: var(--section-padding);
    }

    .bg-light {
      background: #FFFFFF;
    }

    /* 卡片网格 */
    .grid-3, .grid-2x3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 32px;
    }

    .card {
      background: var(--card-bg);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow);
      transition: all 0.3s ease;
    }

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

    .icon-wrap {
      width: 50px;
      height: 50px;
      margin-bottom: 20px;
      color: var(--accent);
    }

    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .compare-block {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: white;
      border-radius: 24px;
      padding: 40px;
      box-shadow: var(--shadow);
    }

    .before, .after {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .compare-title {
      font-size: 1.3rem;
      font-weight: 600;
      color: var(--text);
    }

    .metric {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .metric-value {
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--accent);
    }

    .progress {
      width: 100%;
      height: 6px;
      background: #eee;
      border-radius: 10px;
      overflow: hidden;
      margin-top: 4px;
    }

    .progress-fill {
      height: 100%;
      background: var(--accent);
      width: 0%;
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid #ddd;
      margin-bottom: 12px;
    }

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 20px 16px;
      background: transparent;
      font-weight: 600;
      font-size: 1.1rem;
      color: var(--primary);
      display: flex;
      justify-content: space-between;
      align-items: center;
      border: none;
      cursor: pointer;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #FDF8F0;
      border-radius: 8px;
      margin: 0 16px 12px;
    }

    .faq-answer.open {
      max-height: 200px;
      padding: 16px;
    }

    .faq-answer p {
      margin: 0;
    }

    .cta-block {
      background: var(--primary);
      color: white;
      padding: 80px 0;
      text-align: center;
    }

    .cta-form {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      justify-content: center;
      margin-top: 32px;
    }

    .cta-form input {
      padding: 14px 18px;
      border-radius: 8px;
      border: none;
      font-size: 1rem;
      min-width: 220px;
      background: white;
      color: #1E1E1E;
    }

    .footer {
      background: #1A1A1A;
      color: #ccc;
      padding: 56px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    .copyright {
      border-top: 1px solid #333;
      margin-top: 40px;
      padding-top: 20px;
      text-align: center;
      font-size: 0.9rem;
      color: #aaa;
    }

    @media (max-width: 992px) {
      .hero-content {
        grid-template-columns: 1fr;
      }
      .service-grid, .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .compare-block {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      nav a {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .mobile-nav {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        gap: 16px;
        z-index: 999;
      }
      .mobile-nav.open {
        display: flex;
      }
      .grid-3, .service-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }