/* roulang page: index */
:root {
      --primary: #1A3C5E;
      --accent: #C8A96E;
      --accent-hover: #B8994F;
      --bg-warm: #FDFBF7;
      --surface: #FFFFFF;
      --surface-alt: #F8F6F1;
      --text-primary: #2C2C2C;
      --text-secondary: #6B6B6B;
      --border-light: #D1C9B8;
      --border-subtle: #E8E2D5;
      --success: #2E7D5E;
      --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.08);
      --radius-card: 16px;
      --radius-btn: 8px;
      --transition: 0.3s ease;
    }

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

    body {
      font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
      background-color: var(--bg-warm);
      color: var(--text-primary);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, .accent-font {
      font-family: "Montserrat", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航分屏 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 70px;
      background: rgba(253, 251, 247, 0.96);
      backdrop-filter: blur(12px);
      z-index: 1000;
      display: flex;
      box-shadow: 0 2px 12px rgba(0,0,0,0.02);
      border-bottom: 1px solid rgba(200,169,110,0.2);
    }

    .nav-left {
      width: 60%;
      display: flex;
      align-items: center;
      padding-left: 40px;
      gap: 48px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary);
      letter-spacing: -0.3px;
      white-space: nowrap;
    }

    .logo-icon {
      display: inline-block;
      width: 22px;
      height: 22px;
      background: var(--accent);
      clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
      margin-right: 4px;
    }

    .nav-links {
      display: flex;
      gap: 32px;
    }

    .nav-links a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-primary);
      position: relative;
      padding-bottom: 6px;
      transition: color 0.2s;
    }

    .nav-links a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: width 0.3s ease;
    }

    .nav-links a:hover {
      color: var(--accent);
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    .nav-right {
      width: 40%;
      background: linear-gradient(120deg, rgba(26,60,94,0.02) 0%, rgba(200,169,110,0.08) 100%);
      display: flex;
      align-items: center;
      justify-content: flex-end;
      padding-right: 40px;
    }

    .burger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }

    .burger span {
      width: 26px;
      height: 2px;
      background: var(--primary);
      transition: 0.3s;
    }

    /* Hero 分屏 */
    .hero {
      display: flex;
      min-height: 100vh;
      padding-top: 70px;
    }

    .hero-left {
      width: 50%;
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 0 60px 0 80px;
      background: var(--bg-warm);
    }

    .hero-left h1 {
      font-size: 48px;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.2;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
    }

    .hero-sub {
      font-size: 22px;
      font-weight: 500;
      color: var(--accent);
      margin-bottom: 24px;
      letter-spacing: 0.2px;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-secondary);
      max-width: 400px;
      margin-bottom: 40px;
      line-height: 1.8;
    }

    .btn-primary {
      background: var(--accent);
      color: var(--primary);
      border: none;
      padding: 16px 40px;
      font-weight: 600;
      font-size: 1rem;
      border-radius: var(--radius-btn);
      cursor: pointer;
      transition: all 0.3s ease;
      display: inline-block;
      letter-spacing: 0.3px;
      box-shadow: 0 4px 12px rgba(200,169,110,0.25);
    }

    .btn-primary:hover {
      background: var(--accent-hover);
      transform: scale(1.02);
      box-shadow: 0 8px 22px rgba(200,169,110,0.4);
    }

    .hero-right {
      width: 50%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
    }

    .hero-right::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(26,60,94,0.08) 0%, rgba(26,60,94,0.02) 100%);
    }

    /* 区块标题 */
    .section-title {
      text-align: center;
      margin-bottom: 60px;
    }

    .section-title h2 {
      font-size: 36px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 12px;
    }

    .title-decor {
      width: 50px;
      height: 3px;
      background: var(--accent);
      margin: 0 auto;
    }

    /* 数据看板 */
    .data-dashboard {
      background: var(--surface-alt);
      padding: 80px 0;
    }

    .metrics {
      display: flex;
      justify-content: center;
      gap: 80px;
      flex-wrap: wrap;
      text-align: center;
    }

    .metric-item {
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    .metric-number {
      font-size: 56px;
      font-weight: 800;
      font-family: "Montserrat", sans-serif;
      color: var(--accent);
      line-height: 1.1;
    }

    .metric-label {
      font-size: 18px;
      color: var(--text-primary);
      font-weight: 500;
      margin-top: 12px;
      border-top: 2px solid var(--accent);
      padding-top: 12px;
      width: 100%;
    }

    /* 服务卡片 */
    .services {
      padding: 100px 0;
    }

    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .service-card {
      background: var(--surface);
      padding: 36px 32px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-hover);
    }

    .service-icon {
      width: 64px;
      height: 64px;
      background: rgba(200,169,110,0.12);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 24px;
      color: var(--accent);
      font-size: 28px;
    }

    .service-card h3 {
      font-size: 22px;
      font-weight: 600;
      margin-bottom: 12px;
    }

    .service-card p {
      color: var(--text-secondary);
      flex: 1;
      margin-bottom: 20px;
    }

    .service-link {
      color: var(--accent);
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* 案例对比 */
    .cases {
      padding: 80px 0;
      background: var(--surface-alt);
    }

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

    .case-card {
      background: var(--surface);
      border-radius: var(--radius-card);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .case-img {
      height: 200px;
      background: #f0ebe0 url('/assets/images/coverpic/cover-2.webp') center/cover no-repeat;
      border-radius: 12px;
      margin-bottom: 24px;
    }

    .case-before .case-img {
      background-image: url('/assets/images/coverpic/cover-3.webp');
      opacity: 0.9;
    }

    .case-tag {
      color: var(--success);
      font-weight: 700;
      font-size: 18px;
      margin-bottom: 8px;
    }

    /* FAQ */
    .faq {
      padding: 100px 0;
    }

    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }

    .faq-item {
      border-bottom: 1px solid var(--border-subtle);
      padding: 24px 0;
    }

    .faq-question {
      display: flex;
      align-items: baseline;
      gap: 16px;
      cursor: pointer;
      font-weight: 600;
      font-size: 20px;
      color: var(--primary);
    }

    .faq-number {
      font-family: "Montserrat", sans-serif;
      font-weight: 700;
      color: var(--accent);
      font-size: 24px;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      padding-left: 48px;
      color: var(--text-secondary);
      margin-top: 8px;
      border-left: 3px solid transparent;
    }

    .faq-item.open .faq-answer {
      max-height: 200px;
      border-left-color: var(--accent);
      padding-left: 48px;
    }

    /* 表单 */
    .contact {
      padding: 100px 0;
      background: var(--surface);
    }

    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .contact-form {
      background: var(--bg-warm);
      padding: 40px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
    }

    .form-group {
      margin-bottom: 24px;
    }

    input, textarea {
      width: 100%;
      padding: 14px 16px;
      border: 1px solid var(--border-light);
      border-radius: 6px;
      font-family: inherit;
      background: white;
      transition: 0.2s;
    }

    input:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(200,169,110,0.2);
    }

    .footer {
      background: var(--primary);
      color: #FDFBF7;
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 40px;
    }

    .footer-links a {
      color: var(--accent);
      display: block;
      margin-bottom: 8px;
    }

    .copyright {
      border-top: 1px solid rgba(255,255,255,0.2);
      margin-top: 40px;
      padding-top: 20px;
      text-align: center;
      color: #ccc;
    }

    @media (max-width: 1024px) {
      .nav-links { display: none; }
      .burger { display: flex; }
      .hero { flex-direction: column; }
      .hero-left, .hero-right { width: 100%; }
      .hero-left { padding: 60px 24px; }
      .hero-right { height: 320px; }
      .service-grid { grid-template-columns: repeat(2,1fr); }
      .case-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .service-grid { grid-template-columns: 1fr; }
      .metrics { gap: 40px; }
      .contact-grid { grid-template-columns: 1fr; }
      h1 { font-size: 32px !important; }
      h2 { font-size: 28px !important; }
      .nav-left { padding-left: 20px; }
    }