/* roulang page: index */
:root {
      --primary: #0B3D2E;
      --primary-soft: rgba(11, 61, 46, 0.08);
      --accent: #C49A2B;
      --accent-light: rgba(196, 154, 43, 0.15);
      --bg: #F7F5F0;
      --white: #FFFFFF;
      --text-dark: #1A1A1A;
      --text-body: #4A4A4A;
      --text-muted: #8A8A8A;
      --red-tag: #C0392B;
      --border-light: rgba(0,0,0,0.05);
      --shadow-sm: 0 2px 12px rgba(0,0,0,0.04);
      --shadow-hover: 0 12px 32px rgba(0,0,0,0.08);
      --radius-sm: 12px;
      --radius-lg: 20px;
      --font-h1: 3rem;
      --font-h2: 2.25rem;
      --font-h3: 1.375rem;
      --transition: all 0.3s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background-color: var(--bg);
      color: var(--text-body);
      line-height: 1.7;
      margin: 0;
      padding: 0;
    }

    h1, h2, h3, h4, .nav-logo {
      font-weight: 600;
      color: var(--text-dark);
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }

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

    .container-custom {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航栏 - 悬浮胶囊 */
    .navbar-custom {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 1030;
      width: 90%;
      max-width: 1200px;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(14px);
      border-radius: 60px;
      padding: 8px 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 4px 18px rgba(0,0,0,0.06);
      transition: var(--transition);
    }

    .navbar-scrolled {
      background: rgba(11, 61, 46, 0.92);
      backdrop-filter: blur(14px);
      box-shadow: 0 8px 28px rgba(0,0,0,0.15);
    }

    .navbar-scrolled .nav-logo,
    .navbar-scrolled .nav-link,
    .navbar-scrolled .navbar-cta {
      color: white !important;
    }

    .navbar-scrolled .nav-link:hover {
      color: var(--accent) !important;
    }

    .nav-logo {
      font-size: 1.5rem;
      font-weight: 700;
      letter-spacing: 1px;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 6px;
      white-space: nowrap;
    }

    .nav-logo i {
      font-size: 1.8rem;
      color: var(--accent);
    }

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

    .nav-link {
      color: var(--text-dark);
      font-weight: 500;
      font-size: 1rem;
      padding: 6px 4px;
      border-bottom: 2px solid transparent;
      transition: var(--transition);
    }

    .nav-link:hover {
      color: var(--primary);
      border-bottom-color: var(--accent);
    }

    .navbar-cta {
      background: var(--accent);
      color: var(--text-dark) !important;
      padding: 10px 24px;
      border-radius: 40px;
      font-weight: 600;
      box-shadow: 0 4px 10px rgba(196,154,43,0.3);
      transition: var(--transition);
      white-space: nowrap;
    }

    .navbar-cta:hover {
      background: #b0881f;
      transform: translateY(-2px);
      color: white !important;
    }

    /* 移动端offcanvas */
    .offcanvas-menu {
      background: var(--primary);
      color: white;
      border-radius: 0 20px 20px 0;
    }

    .navbar-toggler {
      border: none;
      color: var(--primary);
      font-size: 1.8rem;
    }

    .navbar-scrolled .navbar-toggler {
      color: white;
    }

    /* Hero */
    .hero-section {
      padding: 140px 0 80px;
      display: flex;
      align-items: center;
      gap: 60px;
      flex-wrap: wrap;
    }

    .hero-left {
      flex: 1 1 55%;
    }

    .hero-right {
      flex: 1 1 40%;
      position: relative;
    }

    .hero-right img {
      border-radius: 24px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.1);
      width: 100%;
      height: auto;
      object-fit: cover;
    }

    .hero-h1 {
      font-size: var(--font-h1);
      font-weight: 700;
      line-height: 1.2;
      color: var(--text-dark);
      margin-bottom: 1.5rem;
    }

    .highlight {
      color: var(--primary);
      position: relative;
    }

    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-body);
      margin-bottom: 2rem;
      max-width: 500px;
    }

    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 2rem;
    }

    .btn-primary-custom {
      background: var(--primary);
      color: white;
      padding: 14px 34px;
      border-radius: 40px;
      font-weight: 600;
      border: none;
      transition: var(--transition);
      box-shadow: 0 6px 16px rgba(11,61,46,0.25);
    }

    .btn-primary-custom:hover {
      background: #0a3325;
      transform: translateY(-3px);
      color: white;
    }

    .btn-outline-accent {
      border: 2px solid var(--accent);
      color: var(--text-dark);
      padding: 14px 34px;
      border-radius: 40px;
      font-weight: 600;
      background: transparent;
      transition: var(--transition);
    }

    .btn-outline-accent:hover {
      background: var(--accent-light);
      border-color: var(--accent);
      color: var(--primary);
      transform: translateY(-3px);
    }

    .trust-text {
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    .trust-text span {
      color: var(--accent);
      font-weight: 700;
      font-size: 1.3rem;
    }

    /* 亮点网格 */
    .section-title {
      font-size: var(--font-h2);
      font-weight: 600;
      margin-bottom: 3rem;
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .section-title::before {
      content: "";
      width: 6px;
      height: 36px;
      background: var(--accent);
      display: inline-block;
      border-radius: 4px;
    }

    .highlight-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin: 60px 0;
    }

    .feature-card {
      background: var(--white);
      padding: 32px 24px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .feature-icon {
      font-size: 2.2rem;
      color: var(--accent);
      margin-bottom: 18px;
    }

    .feature-card h3 {
      font-size: var(--font-h3);
      margin-bottom: 10px;
    }

    .dark-card {
      background: var(--primary);
      color: white;
    }

    .dark-card h3, .dark-card .feature-icon {
      color: white;
    }

    .big-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--accent);
    }

    /* 案例瀑布流 */
    .masonry-grid {
      column-count: 2;
      column-gap: 28px;
      margin: 40px 0;
    }

    .masonry-item {
      break-inside: avoid;
      margin-bottom: 28px;
      background: var(--white);
      border-radius: 20px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      overflow: hidden;
    }

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

    .masonry-item img {
      width: 100%;
      height: auto;
      object-fit: cover;
    }

    .masonry-content {
      padding: 20px 24px;
    }

    .tag {
      color: var(--accent);
      font-weight: 600;
      font-size: 0.85rem;
      background: var(--accent-light);
      padding: 4px 12px;
      border-radius: 20px;
      display: inline-block;
      margin-bottom: 8px;
    }

    /* 方案对比 */
    .pricing-grid {
      display: flex;
      gap: 24px;
      justify-content: center;
      flex-wrap: wrap;
      margin: 50px 0;
    }

    .pricing-card {
      background: white;
      border-radius: 24px;
      padding: 36px 28px;
      flex: 1 1 280px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border: 2px solid transparent;
    }

    .pricing-card.featured {
      border-color: var(--accent);
      transform: scale(1.02);
      box-shadow: 0 20px 40px rgba(0,0,0,0.08);
    }

    .price {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--primary);
    }

    .feature-list {
      list-style: none;
      padding: 0;
    }

    .feature-list li {
      padding: 8px 0;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    /* FAQ */
    .accordion-button {
      font-weight: 600;
      font-size: 1.15rem;
      background: white;
      box-shadow: none;
      border: none;
    }

    .accordion-item {
      border: none;
      border-bottom: 1px solid var(--border-light);
      background: transparent;
    }

    .accordion-button:not(.collapsed) {
      background: transparent;
      color: var(--primary);
      border-left: 4px solid var(--accent);
    }

    /* CTA 横幅 */
    .cta-banner {
      background: var(--primary);
      border-radius: 32px;
      padding: 70px 40px;
      text-align: center;
      color: white;
      margin: 80px 0;
    }

    .footer-dark {
      background: #1A1A1A;
      color: #B0B0B0;
      padding: 60px 0 30px;
    }

    @media (max-width: 992px) {
      .highlight-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .masonry-grid {
        column-count: 1;
      }
    }

    @media (max-width: 768px) {
      .navbar-custom {
        width: 96%;
        padding: 8px 20px;
      }
      .hero-section {
        flex-direction: column;
        padding: 120px 0 50px;
      }
      .hero-h1 {
        font-size: 2.2rem;
      }
      .highlight-grid {
        grid-template-columns: 1fr;
      }
      .pricing-grid {
        flex-direction: column;
      }
    }