/* roulang page: index */
:root {
      --primary: #C44B3C;
      --primary-soft: #FBE9E7;
      --secondary: #1C2838;
      --bg: #FAF9F6;
      --white: #FFFFFF;
      --gold: #D4A853;
      --gold-light: #FDF5F4;
      --text: #1C2838;
      --text-soft: #5A5A5A;
      --border-light: #E0E0E0;
      --shadow-sm: 0 2px 12px rgba(28, 40, 56, 0.06);
      --shadow-hover: 0 8px 24px rgba(196, 75, 60, 0.12);
      --radius: 8px;
      --transition: 0.25s ease;
      --font-serif: 'Noto Serif SC', 'Georgia', 'Times New Roman', serif;
      --font-sans: 'Noto Sans SC', 'Helvetica Neue', 'Arial', sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-serif);
      margin-top: 0;
      color: var(--secondary);
    }

    h1 {
      font-size: 56px;
      line-height: 1.1;
      font-weight: 700;
    }

    h2 {
      font-size: 40px;
      line-height: 1.2;
      font-weight: 600;
      margin-bottom: 1.5rem;
    }

    h3 {
      font-size: 24px;
      line-height: 1.3;
      font-weight: 600;
      margin-bottom: 0.75rem;
    }

    p, .text-body {
      font-size: 16px;
      line-height: 1.7;
      font-weight: 400;
      color: var(--text);
    }

    .text-aux {
      font-size: 14px;
      line-height: 1.6;
      font-weight: 300;
      color: var(--text-soft);
    }

    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, .button {
      cursor: pointer;
      font-family: var(--font-sans);
      transition: all var(--transition);
      border-radius: var(--radius);
      font-weight: 600;
      border: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

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

    /* 导航 */
    .nav-anchor {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      background: transparent;
      transition: background 0.3s ease, box-shadow 0.3s ease;
      height: 64px;
      display: flex;
      align-items: center;
    }

    .nav-anchor.scrolled {
      background: var(--bg);
      box-shadow: 0 2px 12px rgba(0,0,0,0.05);
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 20px;
      color: var(--secondary);
      font-family: var(--font-serif);
      text-decoration: none;
    }

    .logo-icon {
      font-size: 24px;
      color: var(--primary);
    }

    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }

    .nav-links a {
      font-size: 14px;
      font-weight: 500;
      color: var(--secondary);
      text-decoration: none;
      padding: 8px 0;
      border-bottom: 2px solid transparent;
      transition: border-color var(--transition), color var(--transition);
    }

    .nav-links a:hover {
      border-bottom-color: var(--gold);
      color: var(--primary);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .btn-outline {
      background: transparent;
      border: 1px solid var(--secondary);
      color: var(--secondary);
      padding: 10px 20px;
      border-radius: var(--radius);
      font-weight: 600;
      font-size: 14px;
      transition: all var(--transition);
    }

    .btn-outline:hover {
      background: var(--secondary);
      color: white;
    }

    .btn-primary {
      background: var(--primary);
      color: white;
      padding: 10px 24px;
      border-radius: var(--radius);
      font-weight: 600;
      font-size: 14px;
      border: none;
      transition: all var(--transition);
    }

    .btn-primary:hover {
      background: var(--secondary);
      color: white;
    }

    .search-icon {
      color: var(--secondary);
      font-size: 18px;
      cursor: pointer;
    }

    .hamburger {
      display: none;
      font-size: 24px;
      background: none;
      border: none;
      color: var(--secondary);
    }

    /* Hero */
    #hero {
      padding: 160px 0 120px;
      background: var(--bg);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 60px;
      align-items: center;
    }

    .hero-left h1 {
      margin-bottom: 24px;
      opacity: 0;
      animation: fadeInWord 1s forwards;
    }

    @keyframes fadeInWord {
      from { opacity: 0; transform: translateY(10px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .hero-sub {
      font-size: 18px;
      color: var(--secondary);
      margin-bottom: 32px;
      line-height: 1.6;
    }

    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }

    .hero-image {
      position: relative;
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--gold);
      transform: rotate(1deg);
    }

    .hero-image img {
      width: 100%;
      height: auto;
      object-fit: cover;
    }

    /* 通用板块 */
    section {
      padding: 120px 0;
    }

    .section-title {
      text-align: center;
      margin-bottom: 64px;
    }

    .section-title h2 {
      margin-bottom: 16px;
    }

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

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
    }

    .card {
      background: var(--white);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: all var(--transition);
      border: 1px solid transparent;
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: var(--primary-soft);
      position: relative;
    }

    .card:hover::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--primary);
      border-radius: 0 0 var(--radius) var(--radius);
    }

    .icon-circle {
      font-size: 32px;
      color: var(--primary);
      margin-bottom: 20px;
      transition: transform var(--transition), color var(--transition);
    }

    .card:hover .icon-circle {
      transform: rotate(-5deg);
      color: var(--gold);
    }

    /* 功能交替布局 */
    .feature-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 80px;
      align-items: center;
      margin-bottom: 100px;
    }

    .feature-img img {
      border-radius: var(--radius);
      border: 1px solid var(--secondary);
      width: 100%;
    }

    .feature-text ul {
      list-style: none;
      padding: 0;
      margin: 24px 0;
    }

    .feature-text li {
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .feature-text li i {
      color: var(--gold);
      font-size: 18px;
    }

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

    /* 场景卡片 */
    .scenario-card {
      background: var(--white);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .scenario-img img {
      width: 100%;
      aspect-ratio: 16/9;
      object-fit: cover;
    }

    .scenario-content {
      padding: 24px;
    }

    .tag {
      background: var(--primary-soft);
      color: var(--primary);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 600;
      display: inline-block;
      margin-top: 12px;
    }

    /* 案例 */
    .cases-block {
      display: grid;
      grid-template-columns: 0.5fr 1fr;
      gap: 64px;
      align-items: center;
    }

    .big-number {
      font-size: 72px;
      font-weight: 700;
      color: var(--gold);
      font-family: var(--font-serif);
      line-height: 1;
    }

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

    .case-item {
      background: var(--white);
      padding: 24px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }

    /* 价格 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
      align-items: start;
    }

    .price-card {
      background: var(--white);
      border-radius: var(--radius);
      padding: 40px 32px;
      box-shadow: var(--shadow-sm);
      text-align: center;
      border: 1px solid transparent;
      transition: var(--transition);
    }

    .price-card.featured {
      border-color: var(--primary);
      box-shadow: var(--shadow-hover);
      position: relative;
    }

    .badge {
      background: var(--primary);
      color: white;
      padding: 4px 16px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 700;
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
    }

    .price-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--primary);
      margin: 24px 0;
    }

    /* FAQ */
    .accordion-item {
      background: var(--white);
      border-radius: var(--radius);
      margin-bottom: 16px;
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }

    .accordion-title {
      background: none;
      border: none;
      width: 100%;
      text-align: left;
      padding: 24px;
      font-size: 20px;
      font-weight: 600;
      font-family: var(--font-serif);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      transition: background var(--transition);
    }

    .accordion-title:hover {
      background: var(--gold-light);
    }

    .accordion-content {
      padding: 0 24px 24px;
      display: none;
    }

    .accordion-item.active .accordion-content {
      display: block;
    }

    .accordion-item.active .accordion-title {
      background: var(--gold-light);
      border-left: 4px solid var(--gold);
    }

    /* 联系表单 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
    }

    .form-input {
      width: 100%;
      padding: 14px 16px;
      border: 1px solid var(--secondary);
      border-radius: var(--radius);
      font-family: var(--font-sans);
      margin-bottom: 16px;
      transition: border-color var(--transition);
    }

    .form-input:focus {
      outline: none;
      border-color: var(--primary);
    }

    .contact-info i {
      color: var(--gold);
      margin-right: 12px;
    }

    footer {
      background: var(--white);
      padding: 24px 0;
      border-top: 1px solid var(--gold);
      position: relative;
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      font-size: 14px;
      color: var(--text-soft);
    }

    @media (max-width: 1024px) {
      .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .cases-block { grid-template-columns: 1fr; }
      .case-cards { grid-template-columns: repeat(2, 1fr); }
      h1 { font-size: 44px; }
    }

    @media (max-width: 768px) {
      .nav-links, .nav-actions .btn-outline, .nav-actions .btn-primary {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .hero-grid, .feature-row, .contact-grid {
        grid-template-columns: 1fr;
      }
      .grid-3, .grid-4, .pricing-grid {
        grid-template-columns: 1fr;
      }
      section {
        padding: 80px 0;
      }
      h1 { font-size: 36px; }
      h2 { font-size: 28px; }
    }