/* roulang page: index */
:root {
      --deep-檀: #3E2C26;
      --muted-gold: #B49450;
      --cream-white: #F9F5EF;
      --warm-gray: #7A6A5F;
      --mist-green: #C7D1C5;
      --font-serif: 'Noto Serif SC', 'Times New Roman', serif;
      --font-sans: 'Noto Sans SC', 'Helvetica Neue', sans-serif;
      --font-number: 'Inter', sans-serif;
      --shadow-sm: 0 4px 12px rgba(62,44,38,0.06);
      --shadow-md: 0 8px 24px rgba(62,44,38,0.12);
      --border-radius: 8px;
      --transition: all 0.25s ease;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--cream-white);
      color: var(--deep-檀);
      line-height: 1.75;
      font-weight: 400;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4 {
      font-family: var(--font-serif);
      font-weight: 700;
      margin-bottom: 1rem;
      line-height: 1.3;
      color: var(--deep-檀);
    }

    h1 { font-size: 3rem; }
    h2 { font-size: 2.25rem; }
    h3 { font-size: 1.5rem; }
    h4 { font-size: 1.2rem; }

    p {
      margin-bottom: 1.25rem;
      color: var(--warm-gray);
      font-weight: 400;
    }

    .text-gold { color: var(--muted-gold); }
    .bg-cream { background-color: var(--cream-white); }
    .bg-deep { background-color: var(--deep-檀); }
    .bg-gold { background-color: var(--muted-gold); }
    .text-deep { color: var(--deep-檀); }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 按钮系统 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: 6px;
      font-weight: 500;
      font-size: 1rem;
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
      text-decoration: none;
      min-width: 140px;
      font-family: var(--font-sans);
      line-height: 1.4;
    }

    .btn-primary {
      background-color: var(--deep-檀);
      color: var(--cream-white);
      border-color: var(--deep-檀);
    }
    .btn-primary:hover {
      background-color: #4F3830;
      color: white;
      transform: translateY(-1px);
    }

    .btn-outline {
      background: transparent;
      border: 1px solid var(--muted-gold);
      color: var(--muted-gold);
    }
    .btn-outline:hover {
      background-color: rgba(180,148,80,0.1);
      color: var(--muted-gold);
    }

    .btn-gold {
      background-color: var(--muted-gold);
      color: var(--deep-檀);
      font-weight: 600;
    }
    .btn-gold:hover {
      background-color: #c9a95c;
      color: var(--deep-檀);
    }

    /* 导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background-color: rgba(249,245,239, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid rgba(122,106,95,0.25);
      height: 64px;
      display: flex;
      align-items: center;
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo-icon {
      width: 20px;
      height: 20px;
      border-left: 3px solid var(--muted-gold);
      border-bottom: 3px solid var(--muted-gold);
      transform: rotate(-45deg);
      margin-right: 6px;
    }
    .logo-text {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--deep-檀);
      letter-spacing: 2px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-links a {
      font-weight: 500;
      color: var(--deep-檀);
      text-decoration: none;
      font-size: 0.95rem;
      position: relative;
      padding: 8px 0;
      transition: color 0.2s;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--muted-gold);
    }
    .nav-links a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 2px;
      background-color: var(--muted-gold);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .search-icon {
      color: var(--warm-gray);
      font-size: 1.1rem;
      cursor: default;
    }

    /* 移动端菜单 */
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--deep-檀);
    }

    /* Hero 分屏 */
    .hero-section {
      display: flex;
      min-height: 85vh;
      background-color: var(--cream-white);
    }
    .hero-left {
      width: 55%;
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 0 60px 0 20px;
    }
    .hero-right {
      width: 45%;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .hero-right::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: linear-gradient(to right, rgba(62,44,38,0.65) 0%, rgba(62,44,38,0.25) 100%);
    }
    .hero-subtitle {
      font-size: 1.125rem;
      color: var(--warm-gray);
      margin: 1rem 0 2rem;
      max-width: 480px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    /* 通用区块 */
    section {
      padding: 80px 0;
    }
    .section-header {
      text-align: center;
      margin-bottom: 3rem;
    }
    .gold-line {
      width: 60px;
      height: 2px;
      background-color: var(--muted-gold);
      margin: 0 auto 1.5rem;
    }

    /* 优势编号卡 */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      margin-top: 2rem;
    }
    .adv-card {
      background: var(--cream-white);
      padding: 2rem 1.5rem;
      border-radius: var(--border-radius);
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(122,106,95,0.2);
      position: relative;
      transition: var(--transition);
    }
    .adv-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--muted-gold);
    }
    .adv-number {
      font-family: var(--font-serif);
      font-size: 3.5rem;
      color: rgba(180,148,80,0.15);
      position: absolute;
      top: 10px;
      right: 20px;
      line-height: 1;
    }

    /* 产品交替布局 */
    .product-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 70px;
    }
    .product-row.reverse {
      flex-direction: row-reverse;
    }
    .product-img {
      flex: 1;
      border-radius: var(--border-radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      background-color: #e8e3db;
    }
    .product-img img {
      width: 100%;
      height: auto;
      display: block;
      aspect-ratio: 4 / 3;
      object-fit: cover;
    }
    .product-text {
      flex: 1;
    }
    .text-link {
      color: var(--muted-gold);
      font-weight: 500;
      text-decoration: none;
      border-bottom: 1px solid transparent;
      transition: 0.2s;
    }
    .text-link:hover {
      border-bottom: 1px solid var(--muted-gold);
    }

    /* 场景卡片 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .scene-card {
      background: var(--cream-white);
      padding: 2rem;
      border-radius: var(--border-radius);
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(122,106,95,0.2);
      transition: var(--transition);
      position: relative;
    }
    .scene-card:hover {
      transform: translateY(-4px);
      border-bottom: 4px solid var(--deep-檀);
    }
    .scene-icon {
      font-size: 2rem;
      color: var(--muted-gold);
      margin-bottom: 1rem;
    }

    /* 案例+数据 */
    .cases-layout {
      display: flex;
      gap: 50px;
      align-items: flex-start;
    }
    .data-col {
      flex: 1;
    }
    .case-col {
      flex: 1.5;
    }
    .stat-item {
      margin-bottom: 2rem;
    }
    .stat-number {
      font-family: var(--font-number);
      font-weight: 600;
      font-size: 2.8rem;
      color: var(--deep-檀);
    }
    .case-card {
      display: flex;
      gap: 16px;
      margin-bottom: 24px;
      padding-left: 16px;
      border-left: 3px solid var(--muted-gold);
    }

    /* FAQ */
    .accordion-item {
      border-bottom: 1px solid rgba(122,106,95,0.25);
      margin-bottom: 8px;
    }
    .accordion-title {
      font-weight: 600;
      padding: 18px 0;
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 12px;
      color: var(--deep-檀);
    }
    .gold-dot {
      width: 8px;
      height: 8px;
      background-color: var(--muted-gold);
      border-radius: 50%;
    }
    .accordion-content {
      padding: 0 0 20px 24px;
      color: var(--warm-gray);
    }

    /* CTA */
    .cta-section {
      background-color: var(--deep-檀);
      text-align: center;
      padding: 80px 0;
    }
    .cta-section h2 {
      color: var(--cream-white);
    }
    .cta-sub {
      color: rgba(249,245,239,0.8);
      margin-bottom: 2rem;
    }

    /* Footer */
    .site-footer {
      background-color: var(--deep-檀);
      color: rgba(249,245,239,0.85);
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }
    .footer-links a {
      color: rgba(249,245,239,0.7);
      display: block;
      margin-bottom: 8px;
      text-decoration: none;
    }
    .copyright {
      border-top: 1px solid rgba(249,245,239,0.15);
      margin-top: 40px;
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
    }

    @media (max-width: 1024px) {
      .hero-left { padding-right: 20px; }
      .advantages-grid { grid-template-columns: repeat(2,1fr); }
    }

    @media (max-width: 768px) {
      .nav-links, .nav-actions .search-icon { display: none; }
      .menu-toggle { display: block; }
      .hero-section { flex-direction: column; }
      .hero-left, .hero-right { width: 100%; }
      .hero-right { height: 280px; }
      .hero-right::before { background: linear-gradient(to bottom, rgba(62,44,38,0.7), transparent); }
      .advantages-grid, .scenario-grid { grid-template-columns: 1fr; }
      .product-row, .product-row.reverse { flex-direction: column; }
      .cases-layout { flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      h1 { font-size: 2rem; }
      h2 { font-size: 1.8rem; }
    }