/* roulang page: index */
:root {
      --primary: #1B3A5C;
      --primary-light: #2a4e74;
      --accent: #C49A2B;
      --accent-light: #e0b84c;
      --bg-light: #F7F9FC;
      --bg-alt: #F0F3F7;
      --white: #FFFFFF;
      --text-dark: #1e2b3c;
      --text-soft: #54657a;
      --text-light: #8a98a9;
      --border-soft: rgba(27,58,92,0.1);
      --shadow-card: 0 4px 20px rgba(27,58,92,0.08);
      --shadow-hover: 0 12px 28px rgba(27,58,92,0.15);
      --radius-card: 16px;
      --radius-btn: 8px;
      --font-title: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --font-body: 'Inter', 'Noto Sans SC', 'PingFang SC', sans-serif;
      --transition: all 0.25s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-body);
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.7;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4 {
      font-family: var(--font-title);
      font-weight: 700;
      letter-spacing: -0.02em;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    /* 复古社区小站装饰线条 */
    .vintage-border {
      position: relative;
    }
    .vintage-border::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 60px;
      height: 4px;
      background: var(--accent);
      border-radius: 0 0 4px 0;
      opacity: 0.7;
    }
    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255,255,255,0.96);
      backdrop-filter: blur(8px);
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      z-index: 40;
      border-bottom: 1px solid rgba(196,154,43,0.2);
    }
    .nav-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.75rem 0;
      flex-wrap: wrap;
    }
    .logo {
      display: flex;
      align-items: baseline;
      gap: 6px;
      font-family: var(--font-title);
      font-weight: 700;
      font-size: 1.6rem;
      color: var(--primary);
    }
    .logo .highlight {
      color: var(--accent);
      font-size: 2rem;
      margin-right: 4px;
      font-weight: 700;
    }
    .logo .domain {
      font-size: 0.85rem;
      font-weight: 400;
      color: var(--text-soft);
      letter-spacing: 0.3px;
      margin-left: 4px;
    }
    .desktop-nav {
      display: flex;
      align-items: center;
      gap: 2rem;
    }
    .desktop-nav a {
      font-weight: 600;
      font-size: 1rem;
      color: var(--text-dark);
      padding: 0.4rem 0;
      border-bottom: 2px solid transparent;
      transition: var(--transition);
    }
    .desktop-nav a:hover {
      color: var(--accent);
      border-bottom-color: var(--accent);
    }
    .cta-group {
      display: flex;
      align-items: center;
      gap: 0.8rem;
    }
    .btn-primary {
      background: var(--accent);
      color: white;
      border: none;
      padding: 0.6rem 1.6rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 0.95rem;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid var(--accent);
      box-shadow: 0 2px 8px rgba(196,154,43,0.25);
    }
    .btn-primary:hover {
      background: var(--primary);
      border-color: var(--primary);
      box-shadow: 0 6px 14px rgba(27,58,92,0.3);
    }
    .badge-promo {
      background: transparent;
      border: 1.5px solid var(--accent);
      color: var(--accent);
      font-size: 0.75rem;
      font-weight: 700;
      padding: 0.25rem 0.7rem;
      border-radius: 20px;
      letter-spacing: 0.4px;
    }
    .menu-icon {
      display: none;
      font-size: 1.8rem;
      color: var(--primary);
      cursor: pointer;
    }
    /* 移动端导航 */
    @media (max-width: 768px) {
      .desktop-nav, .cta-group {
        display: none;
      }
      .menu-icon {
        display: block;
      }
      .mobile-menu {
        display: none;
        flex-direction: column;
        width: 100%;
        background: white;
        padding: 1.2rem 1rem;
        gap: 1.2rem;
        border-top: 1px solid var(--border-soft);
      }
      .mobile-menu.active {
        display: flex;
      }
      .mobile-menu a {
        font-weight: 600;
        font-size: 1.2rem;
        color: var(--primary);
      }
      .mobile-cta {
        display: flex;
        flex-direction: column;
        gap: 0.8rem;
        margin-top: 0.6rem;
      }
    }
    /* 板块通用 */
    section {
      padding: 5rem 0;
    }
    .section-title {
      font-size: clamp(2rem, 5vw, 2.6rem);
      margin-bottom: 1rem;
      color: var(--primary);
      position: relative;
      display: inline-block;
      font-weight: 700;
    }
    .section-title::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -8px;
      width: 50%;
      height: 4px;
      background: var(--accent);
      border-radius: 2px;
      opacity: 0.8;
    }
    .section-sub {
      color: var(--text-soft);
      font-size: 1.1rem;
      margin-bottom: 2.5rem;
      max-width: 700px;
    }
    /* Hero 复古手作感 */
    #hero {
      background: linear-gradient(135deg, #ece4d7 0%, #f5efe6 100%);
      padding: 8rem 0 4rem;
      border-bottom: 2px solid rgba(196,154,43,0.35);
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 2.5rem;
      flex-wrap: wrap;
    }
    .hero-text {
      flex: 1 1 45%;
    }
    .hero-text h1 {
      font-size: clamp(2.5rem, 6vw, 3.6rem);
      line-height: 1.25;
      color: var(--primary);
      margin-bottom: 1.5rem;
      font-family: var(--font-title);
      text-shadow: 2px 2px 0 rgba(196,154,43,0.15);
    }
    .hero-text p {
      font-size: 1.2rem;
      color: var(--text-soft);
      margin-bottom: 2rem;
      font-style: italic;
    }
    .hero-buttons {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      padding: 0.6rem 1.8rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: var(--transition);
    }
    .btn-outline:hover {
      background: var(--primary);
      color: white;
      border-color: var(--primary);
    }
    .hero-image {
      flex: 1 1 45%;
      background: rgba(255,255,255,0.6);
      border-radius: 28px;
      padding: 1rem;
      box-shadow: 0 20px 30px rgba(27,58,92,0.1);
      border: 1px dashed var(--accent);
    }
    /* 服务卡片 */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 2rem;
    }
    .service-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 2rem 1.8rem;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      border-left: 4px solid transparent;
      position: relative;
    }
    .service-card:hover {
      box-shadow: var(--shadow-hover);
      border-left: 4px solid var(--accent);
      transform: translateY(-5px);
    }
    .service-icon {
      font-size: 2.2rem;
      color: var(--accent);
      margin-bottom: 1.2rem;
    }
    .service-card h3 {
      font-size: 1.5rem;
      margin-bottom: 0.8rem;
    }
    .more-link {
      color: var(--accent);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      margin-top: 0.8rem;
    }
    /* 优势数据带 */
    .stats-row {
      background: #e9dccd;
      border-radius: 24px;
      padding: 2.2rem 1.5rem;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-around;
      text-align: center;
      box-shadow: inset 0 0 0 1px rgba(196,154,43,0.3);
    }
    .stat-item h3 {
      font-size: 2.6rem;
      color: var(--accent);
      font-weight: 700;
    }
    /* 案例卡片 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 2rem;
    }
    .case-card {
      background: white;
      border-radius: 20px;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      border: 1px solid rgba(196,154,43,0.15);
    }
    .case-card:hover {
      box-shadow: var(--shadow-hover);
    }
    .case-img {
      height: 200px;
      object-fit: cover;
      transition: transform 0.3s;
    }
    .case-card:hover .case-img {
      transform: scale(1.03);
    }
    .case-content {
      padding: 1.8rem;
    }
    .tag {
      background: var(--accent);
      color: white;
      font-size: 0.75rem;
      padding: 0.2rem 0.8rem;
      border-radius: 20px;
      display: inline-block;
      margin-bottom: 0.6rem;
    }
    /* 流程 */
    .process-steps {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
    }
    .step {
      text-align: center;
      flex: 1;
      min-width: 100px;
    }
    .circle {
      width: 50px;
      height: 50px;
      background: var(--primary);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin: 0 auto 0.5rem;
      font-size: 1.4rem;
    }
    /* FAQ */
    .accordion-item {
      background: white;
      border-radius: 12px;
      margin-bottom: 1rem;
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
    }
    .accordion-title {
      font-weight: 700;
      color: var(--primary);
      font-size: 1.25rem;
    }
    /* CTA */
    .cta-strip {
      background: var(--primary);
      color: white;
      text-align: center;
      padding: 3.5rem 1rem;
      border-radius: 32px;
      margin: 2rem 0;
    }
    /* 页脚 */
    .footer {
      background: #0F2537;
      color: #cbd5e1;
      padding: 3rem 0 1.5rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px,1fr));
      gap: 2rem;
    }
    @media (max-width: 768px) {
      .hero-grid {
        flex-direction: column-reverse;
      }
      .stats-row {
        flex-direction: column;
        gap: 1.8rem;
      }
    }