/* roulang page: index */
:root {
      --primary: #0B3D3A;
      --primary-dark: #05201D;
      --accent: #C8A96E;
      --cta: #D94F3D;
      --bg: #F7F4EF;
      --white: #FFFFFF;
      --text: #3A3A3A;
      --text-light: #7A7A7A;
      --border-light: rgba(11,61,58,0.08);
      --shadow-card: 0 8px 30px rgba(0,0,0,0.04);
      --shadow-hover: 0 16px 40px rgba(0,0,0,0.08);
      --radius-card: 16px;
      --radius-btn: 40px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --font-number: "Inter", "SF Pro Display", system-ui;
      --transition: 0.3s cubic-bezier(0.25,0.8,0.25,1.2);
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }
    h1, h2, h3, h4, h5 {
      font-weight: 700;
      letter-spacing: 0.01em;
      color: var(--primary-dark);
      line-height: 1.25;
    }
    h1 {
      font-size: clamp(2.8rem, 6vw, 4.5rem);
      font-weight: 800;
      letter-spacing: 0.02em;
    }
    h2 {
      font-size: clamp(2rem, 4vw, 2.8rem);
      margin-bottom: 1rem;
    }
    h3 {
      font-size: 1.4rem;
      font-weight: 600;
    }
    p {
      font-size: 1rem;
      color: var(--text);
    }
    .text-accent {
      color: var(--accent);
    }
    .text-cta {
      color: var(--cta);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
    }
    button, .btn {
      cursor: pointer;
      font-family: var(--font-sans);
      border: none;
      outline: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      font-weight: 600;
      transition: var(--transition);
    }
    .btn-primary {
      background: var(--cta);
      color: white;
      padding: 0.8rem 2rem;
      border-radius: var(--radius-btn);
      box-shadow: 0 4px 12px rgba(217,79,61,0.3);
    }
    .btn-primary:hover {
      background: #c44231;
      transform: scale(1.03);
      box-shadow: 0 8px 20px rgba(217,79,61,0.4);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--primary);
      color: var(--primary);
      padding: 0.8rem 2rem;
      border-radius: var(--radius-btn);
    }
    .btn-outline:hover {
      background: var(--primary);
      color: white;
    }
    .btn-light {
      background: white;
      color: var(--primary-dark);
      padding: 0.8rem 2rem;
      border-radius: var(--radius-btn);
      font-weight: 700;
    }
    .btn-light:hover {
      background: #f0ede6;
      transform: scale(1.02);
    }
    section {
      padding: 6rem 0;
    }
    @media (max-width: 768px) {
      section {
        padding: 4rem 0;
      }
      h1 {
        font-size: 2.5rem;
      }
    }
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(247,244,239,0.9);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(11,61,58,0.05);
      transition: background 0.3s, backdrop-filter 0.3s;
    }
    .navbar.scrolled {
      background: rgba(11,61,58,0.88);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(200,169,110,0.2);
    }
    .navbar.scrolled .nav-logo, .navbar.scrolled .nav-link, .navbar.scrolled .nav-btn {
      color: #F7F4EF;
    }
    .navbar.scrolled .nav-link:hover, .navbar.scrolled .nav-link.active {
      color: var(--accent);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0.8rem 1.5rem;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: 0.02em;
    }
    .logo i {
      font-size: 1.8rem;
      color: var(--accent);
    }
    .nav-menu {
      display: flex;
      gap: 2rem;
      align-items: center;
    }
    .nav-link {
      font-weight: 500;
      color: var(--text);
      position: relative;
      padding: 0.2rem 0;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: width 0.25s;
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      color: var(--primary-dark);
    }
    @media (max-width: 1024px) {
      .nav-menu {
        display: none;
        position: fixed;
        top: 0;
        right: 0;
        height: 100vh;
        width: 280px;
        background: var(--primary-dark);
        flex-direction: column;
        padding: 3rem 2rem;
        gap: 2rem;
        box-shadow: -10px 0 30px rgba(0,0,0,0.2);
        z-index: 1001;
        transform: translateX(100%);
        transition: transform 0.4s ease;
      }
      .nav-menu.active {
        display: flex;
        transform: translateX(0);
      }
      .nav-link {
        color: #F7F4EF;
        font-size: 1.2rem;
      }
      .mobile-toggle {
        display: block;
      }
    }
    /* Hero */
    .hero {
      padding-top: 7rem;
      display: flex;
      align-items: center;
      min-height: 90vh;
      background: linear-gradient(135deg, rgba(247,244,239,0.7) 0%, rgba(247,244,239,0.3) 100%);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
    }
    .hero-text h1 {
      color: var(--primary-dark);
    }
    .hero-text .subtitle {
      font-size: 1.2rem;
      color: var(--text-light);
      margin: 1.5rem 0 2rem;
      max-width: 90%;
    }
    .hero-buttons {
      display: flex;
      gap: 1.2rem;
      flex-wrap: wrap;
      margin-bottom: 2rem;
    }
    .trust-badge {
      display: flex;
      align-items: center;
      gap: 1rem;
      font-size: 0.9rem;
      color: var(--text-light);
    }
    .hero-image {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 24px;
      height: 500px;
      position: relative;
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    }
    .hero-image::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(11,61,58,0.2) 0%, rgba(200,169,110,0.2) 100%);
      mix-blend-mode: overlay;
    }
    @media (max-width: 768px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .hero-image {
        height: 300px;
        order: -1;
      }
    }
    /* features 混合布局 */
    .features-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
    }
    .feature-large {
      grid-row: span 2;
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }
    .feature-large:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .feature-large img {
      width: 100%;
      height: 280px;
      object-fit: cover;
    }
    .feature-large .card-content {
      padding: 2rem;
    }
    .feature-small {
      background: white;
      border-radius: var(--radius-card);
      padding: 1.8rem;
      display: flex;
      gap: 1.2rem;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      border-left: 4px solid var(--primary);
    }
    .feature-small:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
    }
    @media (max-width: 768px) {
      .features-grid {
        grid-template-columns: 1fr;
      }
      .feature-large {
        grid-row: auto;
      }
    }
    /* 场景横向滚动 */
    .scenarios-scroll {
      display: flex;
      gap: 1.5rem;
      overflow-x: auto;
      padding: 1rem 0 2rem;
      scroll-snap-type: x mandatory;
      -webkit-overflow-scrolling: touch;
    }
    .scenario-card {
      min-width: 300px;
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      scroll-snap-align: start;
      transition: var(--transition);
      flex-shrink: 0;
    }
    .scenario-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .scenario-card img {
      height: 200px;
      object-fit: cover;
    }
    /* 案例深色区 */
    .cases-section {
      background: linear-gradient(135deg, #0B3D3A 0%, #0A1F1C 100%);
      color: #F7F4EF;
    }
    .cases-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
      margin-top: 2rem;
    }
    .stat-number {
      font-family: var(--font-number);
      font-size: clamp(2.5rem, 5vw, 3.5rem);
      font-weight: 800;
      color: var(--accent);
    }
    .case-card {
      background: rgba(255,255,255,0.07);
      border-radius: var(--radius-card);
      padding: 2rem;
      backdrop-filter: blur(4px);
    }
    @media (max-width: 768px) {
      .cases-grid {
        grid-template-columns: 1fr;
      }
    }
    /* 价格卡 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      align-items: start;
    }
    .pricing-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 2.5rem 2rem;
      box-shadow: var(--shadow-card);
      text-align: center;
      transition: var(--transition);
      border: 1px solid transparent;
    }
    .pricing-card.featured {
      border-color: var(--accent);
      transform: scale(1.03);
      box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    }
    @media (max-width: 768px) {
      .pricing-grid {
        grid-template-columns: 1fr;
      }
    }
    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      border-bottom: 1px solid var(--border-light);
    }
    .faq-question {
      width: 100%;
      background: none;
      padding: 1.2rem 0;
      font-size: 1.1rem;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      color: var(--primary-dark);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      color: var(--text-light);
    }
    /* CTA */
    .cta-section {
      background: linear-gradient(45deg, #C8A96E, #D94F3D);
      text-align: center;
      border-radius: 0;
    }
    .footer {
      background: #05201D;
      color: #F7F4EF;
      padding: 4rem 0 1.5rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2rem;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }
    .fade-up {
      opacity: 0;
      transform: translateY(30px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .fade-up.visible {
      opacity: 1;
      transform: translateY(0);
    }