/* roulang page: index */
:root {
      --black-midnight: #0B0C0E;
      --amber-gold: #C8923B;
      --warm-limestone: #F5F2ED;
      --teal-growth: #1B7A6E;
      --text-primary: #1A1A1A;
      --text-secondary: #5C5C5C;
      --white-pure: #FFFFFF;
      --border-light: #E8E3DC;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.08);
      --radius-card: 6px;
      --transition-base: 0.3s ease;
      --font-serif: 'Noto Serif SC', '思源宋体', serif;
      --font-sans: 'Inter', 'PingFang SC', '微软雅黑', sans-serif;
      --font-mono: 'DM Mono', 'JetBrains Mono', monospace;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--warm-limestone);
      color: var(--text-primary);
      line-height: 1.8;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航信息条 */
    .top-bar-info {
      background: var(--black-midnight);
      color: var(--warm-limestone);
      font-size: 12px;
      height: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
      letter-spacing: 0.3px;
    }
    .top-bar-info a {
      color: var(--warm-limestone);
      transition: color 0.2s;
    }
    .top-bar-info a:hover {
      color: var(--amber-gold);
    }
    .top-bar-info .phone-icon {
      color: var(--amber-gold);
      margin-right: 4px;
      font-size: 14px;
    }
    /* 主导航 */
    .main-header {
      background: var(--white-pure);
      height: 72px;
      border-bottom: 1px solid var(--border-light);
      position: sticky;
      top: 0;
      z-index: 40;
      transition: box-shadow 0.3s;
    }
    .main-header.scrolled {
      box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }
    .logo-text {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 22px;
      color: var(--amber-gold);
      letter-spacing: 0.5px;
      display: flex;
      align-items: center;
    }
    .logo-text i {
      font-size: 24px;
      margin-right: 8px;
      color: var(--amber-gold);
    }
    .nav-links {
      display: flex;
      gap: 2rem;
    }
    .nav-links a {
      font-weight: 500;
      font-size: 15px;
      color: var(--text-primary);
      padding: 8px 0;
      border-bottom: 2px solid transparent;
      transition: color 0.2s, border-color 0.2s;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--amber-gold);
      border-bottom-color: var(--amber-gold);
    }
    .mobile-menu-icon {
      display: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-primary);
    }
    @media (max-width: 1024px) {
      .nav-links {
        gap: 1.2rem;
      }
    }
    @media (max-width: 640px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-hover);
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-menu-icon {
        display: block;
      }
    }
    /* 区块通用 */
    section {
      padding: 100px 0;
    }
    @media (max-width: 640px) {
      section {
        padding: 60px 0;
      }
    }
    h2 {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 36px;
      letter-spacing: -0.02em;
      color: var(--text-primary);
      margin-bottom: 20px;
    }
    h3 {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 22px;
      margin-bottom: 12px;
    }
    .section-subtitle {
      font-size: 16px;
      color: var(--text-secondary);
      margin-bottom: 40px;
      max-width: 700px;
    }
    /* 按钮 */
    .btn-primary {
      background: var(--amber-gold);
      color: white;
      padding: 14px 36px;
      border-radius: 6px;
      font-weight: 600;
      display: inline-block;
      transition: background 0.3s, box-shadow 0.3s;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background: #A6772E;
      box-shadow: 0 4px 12px rgba(198, 146, 59, 0.3);
    }
    .btn-secondary {
      background: transparent;
      border: 1.5px solid var(--amber-gold);
      color: var(--amber-gold);
      padding: 14px 36px;
      border-radius: 6px;
      font-weight: 600;
      display: inline-block;
      transition: all 0.3s;
    }
    .btn-secondary:hover {
      background: rgba(200, 146, 59, 0.1);
    }
    .btn-cta {
      background: var(--teal-growth);
      color: white;
      padding: 16px 40px;
      border-radius: 6px;
      font-weight: 700;
      font-size: 18px;
      border: none;
      cursor: pointer;
      transition: background 0.3s;
    }
    .btn-cta:hover {
      background: #156358;
    }
    /* 卡片 */
    .card-custom {
      background: var(--white-pure);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      transition: border-color 0.3s, box-shadow 0.3s;
      padding: 24px;
    }
    .card-custom:hover {
      border-color: var(--amber-gold);
      box-shadow: var(--shadow-hover);
    }
    /* Hero */
    #hero {
      background: var(--warm-limestone);
      padding-top: 60px;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      align-items: center;
      gap: 50px;
    }
    .hero-left h1 {
      font-family: var(--font-serif);
      font-size: 48px;
      font-weight: 700;
      letter-spacing: -0.02em;
      margin-bottom: 20px;
      line-height: 1.2;
    }
    .hero-left p {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 30px;
    }
    .hero-right {
      background: #f0ede6;
      border-radius: 12px;
      height: 380px;
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      overflow: hidden;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
    }
    .watermark-number {
      font-family: var(--font-mono);
      font-size: 180px;
      color: rgba(27,122,110,0.05);
      position: absolute;
    }
    @media (max-width: 768px) {
      .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
      }
      .hero-left h1 {
        font-size: 36px;
      }
    }
    /* 指标看板 */
    #metrics {
      background: var(--black-midnight);
      color: white;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      text-align: center;
    }
    .metric-card {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: var(--radius-card);
      padding: 32px 20px;
    }
    .metric-number {
      font-family: var(--font-mono);
      font-size: 48px;
      font-weight: 500;
      color: var(--amber-gold);
    }
    .metric-label {
      font-size: 14px;
      color: #ccc;
      margin-top: 8px;
    }
    @media (max-width: 768px) {
      .metrics-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 640px) {
      .metrics-grid {
        grid-template-columns: 1fr;
      }
    }
    /* 服务矩阵错位栅格 */
    .service-row {
      display: grid;
      grid-template-columns: 7fr 5fr;
      gap: 40px;
      align-items: center;
      margin-bottom: 60px;
    }
    .service-row.reverse {
      grid-template-columns: 5fr 7fr;
    }
    .service-img {
      background: #e0dbd2;
      border-radius: 8px;
      overflow: hidden;
      height: 320px;
    }
    .service-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      filter: grayscale(30%);
      transition: filter 0.4s;
    }
    .service-img:hover img {
      filter: grayscale(0%);
    }
    .service-text h3 {
      color: var(--text-primary);
    }
    .service-text p {
      color: var(--text-secondary);
      margin-bottom: 16px;
    }
    .text-link {
      color: var(--amber-gold);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .text-link i {
      transition: transform 0.2s;
    }
    .text-link:hover i {
      transform: translateX(4px);
    }
    @media (max-width: 768px) {
      .service-row, .service-row.reverse {
        grid-template-columns: 1fr;
      }
    }
    /* 对比区块 */
    .comparison-table {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0;
      background: white;
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--border-light);
    }
    .compare-col {
      padding: 32px;
    }
    .compare-left {
      background: #f9f7f3;
      color: #6b6b6b;
    }
    .compare-right {
      background: white;
    }
    .compare-item {
      display: flex;
      justify-content: space-between;
      padding: 16px 0;
      border-bottom: 1px solid #ece7dd;
    }
    .compare-left .compare-item span {
      text-decoration: line-through;
      color: #999;
    }
    .compare-right .compare-item span {
      font-weight: 700;
      color: var(--amber-gold);
    }
    .highlight-check {
      color: var(--teal-growth);
      margin-left: 8px;
    }
    @media (max-width: 640px) {
      .comparison-table {
        grid-template-columns: 1fr;
      }
    }
    /* FAQ */
    .accordion-title {
      font-size: 16px;
      font-weight: 600;
      background: white;
      border: 1px solid var(--border-light);
      border-radius: 6px;
      padding: 16px 20px;
      margin-bottom: 8px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .accordion-title i {
      color: var(--amber-gold);
      transition: transform 0.3s;
    }
    .accordion-content {
      padding: 0 20px 16px;
      color: var(--text-secondary);
      font-size: 15px;
      display: none;
    }
    .faq-item.active .accordion-content {
      display: block;
    }
    .faq-item.active .accordion-title i {
      transform: rotate(45deg);
    }
    /* CTA */
    #cta {
      background: var(--black-midnight);
      color: white;
    }
    .cta-form input {
      background: rgba(255,255,255,0.1);
      border: none;
      border-bottom: 1px solid rgba(255,255,255,0.3);
      color: white;
      padding: 12px;
      margin-bottom: 16px;
    }
    .cta-form input:focus {
      outline: none;
      border-bottom-color: var(--amber-gold);
    }
    .trust-badge {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: #ccc;
      margin-bottom: 24px;
    }
    /* Footer */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 480px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }
    footer {
      background: #0B0C0E;
      color: #9B9B9B;
      padding: 50px 0 20px;
    }
    footer a:hover {
      color: var(--amber-gold);
    }
    .footer-logo {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 20px;
      color: var(--amber-gold);
    }
    .copyright {
      border-top: 1px solid #2a2a2a;
      margin-top: 30px;
      padding-top: 20px;
      font-size: 12px;
      text-align: center;
    }
    .fade-in {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .fade-in.visible {
      opacity: 1;
      transform: translateY(0);
    }