/* roulang page: index */
:root {
      --deep-ocean: #0B1E3F;
      --champagne-gold: #C8A96E;
      --warm-bg: #F7F5F0;
      --white: #FFFFFF;
      --card-gray: #F0EFEB;
      --text-dark: #1A1A1A;
      --text-muted: #5C5C5C;
      --trust-green: #2D6A4F;
      --border-light: #D9D6CF;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.10);
      --radius-card: 18px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --transition: all 0.25s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      background-color: var(--warm-bg);
      color: var(--text-dark);
      line-height: 1.6;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    .header {
      background: var(--deep-ocean);
      height: 72px;
      position: sticky;
      top: 0;
      z-index: 50;
      display: flex;
      align-items: center;
      box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    }
    .nav-grid {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
    }
    .logo {
      font-size: 24px;
      font-weight: 700;
      color: white;
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo i {
      color: var(--champagne-gold);
      font-size: 28px;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      color: rgba(255,255,255,0.85);
      font-size: 15px;
      font-weight: 500;
      padding: 6px 0;
      border-bottom: 2px solid transparent;
    }
    .nav-links a:hover {
      color: var(--champagne-gold);
      border-bottom: 2px solid var(--champagne-gold);
    }
    .cta-nav {
      background: linear-gradient(135deg, #C8A96E 0%, #B8944A 100%);
      color: white !important;
      padding: 10px 24px !important;
      border-radius: var(--radius-btn);
      font-weight: 600;
      box-shadow: 0 4px 10px rgba(200,169,110,0.3);
      border: none;
      margin-left: 16px;
      transition: var(--transition);
      font-size: 15px;
      white-space: nowrap;
    }
    .cta-nav:hover {
      filter: brightness(1.1);
      transform: translateY(-1px);
      color: white !important;
      border-bottom: none !important;
    }
    .mobile-toggle {
      display: none;
      color: white;
      font-size: 26px;
      cursor: pointer;
    }
    /* Hero */
    .hero {
      background: linear-gradient(135deg, #0B1E3F 0%, #132D56 100%);
      min-height: 85vh;
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
      padding: 60px 0;
    }
    .hero-content {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 40px;
      flex-wrap: wrap;
    }
    .hero-text {
      flex: 1 1 400px;
      color: white;
    }
    .hero-text h1 {
      font-size: 38px;
      line-height: 1.3;
      font-weight: 700;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-text p {
      font-size: 18px;
      color: rgba(255,255,255,0.8);
      margin-bottom: 32px;
      max-width: 500px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, #C8A96E, #b28b40);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 6px 18px rgba(200,169,110,0.35);
      letter-spacing: 0.5px;
    }
    .btn-primary:hover {
      filter: brightness(1.1);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--champagne-gold);
      color: var(--champagne-gold);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-outline:hover {
      background: rgba(200,169,110,0.1);
    }
    .hero-image {
      flex: 1 1 400px;
      position: relative;
      display: flex;
      justify-content: center;
    }
    .hero-card-img {
      background: rgba(255,255,255,0.08);
      border-radius: 24px;
      padding: 12px;
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255,255,255,0.15);
    }
    .hero-card-img img {
      border-radius: 18px;
      width: 100%;
      height: auto;
      object-fit: cover;
    }
    .badge-row {
      display: flex;
      gap: 24px;
      margin-top: 30px;
      flex-wrap: wrap;
    }
    .badge {
      background: rgba(255,255,255,0.1);
      backdrop-filter: blur(6px);
      padding: 8px 18px;
      border-radius: 50px;
      color: var(--champagne-gold);
      font-weight: 600;
      font-size: 15px;
      display: flex;
      align-items: center;
      gap: 8px;
      border: 1px solid rgba(200,169,110,0.3);
    }
    /* 通用板块 */
    section {
      padding: 100px 0;
    }
    .section-title {
      text-align: center;
      margin-bottom: 16px;
    }
    .section-title h2 {
      font-size: 28px;
      font-weight: 700;
      color: var(--deep-ocean);
    }
    .section-sub {
      text-align: center;
      color: var(--text-muted);
      max-width: 600px;
      margin: 0 auto 50px;
      font-size: 17px;
    }
    .card-grid {
      display: flex;
      gap: 28px;
      flex-wrap: wrap;
      justify-content: center;
    }
    .feature-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      flex: 1 1 280px;
      max-width: 350px;
      transition: var(--transition);
      border-top: 4px solid var(--champagne-gold);
      position: relative;
    }
    .feature-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .icon-wrap {
      width: 64px;
      height: 64px;
      background: rgba(200,169,110,0.08);
      border-radius: 18px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }
    .icon-wrap img {
      width: 40px;
      height: 40px;
      object-fit: contain;
    }
    .feature-card h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 10px;
    }
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .service-item {
      background: var(--card-gray);
      border-radius: var(--radius-card);
      padding: 28px 20px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .status {
      font-size: 13px;
      font-weight: 600;
      color: var(--deep-ocean);
      background: rgba(200,169,110,0.2);
      padding: 4px 12px;
      border-radius: 50px;
      display: inline-block;
      width: fit-content;
    }
    .comparison-wrapper {
      display: flex;
      gap: 40px;
      align-items: stretch;
    }
    .compare-card {
      flex: 1;
      background: white;
      border-radius: 24px;
      padding: 32px;
    }
    .premium-card {
      background: linear-gradient(145deg, #0B1E3F, #1A335A);
      color: white;
    }
    .vs-badge {
      font-weight: 700;
      font-size: 20px;
      color: var(--champagne-gold);
      align-self: center;
      background: white;
      border-radius: 50%;
      width: 60px;
      height: 60px;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-sm);
    }
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 20px 0;
    }
    .faq-question {
      font-weight: 600;
      font-size: 18px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--deep-ocean);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-muted);
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      margin-top: 12px;
    }
    .contact-row {
      display: flex;
      gap: 50px;
      background: white;
      border-radius: 28px;
      padding: 48px;
      box-shadow: var(--shadow-sm);
    }
    .contact-form input, .contact-form textarea {
      width: 100%;
      padding: 14px;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-input);
      margin-bottom: 16px;
      font-size: 16px;
    }
    .footer {
      background: var(--deep-ocean);
      color: #B0B8C1;
      padding: 60px 0 20px;
    }
    .footer-grid {
      display: flex;
      gap: 40px;
      flex-wrap: wrap;
      justify-content: space-between;
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        background: var(--deep-ocean);
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        padding: 20px;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-links.active {
        display: flex;
      }
      .service-grid {
        grid-template-columns: 1fr;
      }
      .comparison-wrapper {
        flex-direction: column;
      }
      .contact-row {
        flex-direction: column;
      }
    }