/* roulang page: index */
:root {
      --primary: #1A5F4A;
      --primary-hover: #144D3C;
      --secondary: #F4A261;
      --accent: #E76F51;
      --accent-hover: #D45D3F;
      --bg-light: #FAFBF7;
      --bg-dark: #1E2D2B;
      --card-bg: #FFFFFF;
      --text-dark: #1A1A1A;
      --text-body: #3A3A3A;
      --text-muted: #6B6B6B;
      --text-on-dark: #F5F5F0;
      --border-light: #E8ECEB;
      --border-subtle: #E0E4E3;
      --border-active: rgba(26,95,74,0.12);
      --shadow-sm: 0 2px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 28px rgba(0,0,0,0.08);
      --radius-card: 16px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --radius-pill: 40px;
      --font-heading: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
      --font-body: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", sans-serif;
      --font-number: "Inter", "Segoe UI", system-ui, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-body);
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.8;
      margin: 0;
      padding: 0;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-family: var(--font-heading);
      font-weight: 700;
      color: var(--text-dark);
      letter-spacing: -0.02em;
    }

    h1 {
      font-size: 44px;
      line-height: 1.2;
    }

    h2 {
      font-size: 36px;
      margin-bottom: 0.6rem;
    }

    h3 {
      font-size: 22px;
      font-weight: 600;
    }

    p {
      margin-bottom: 1.2rem;
      color: var(--text-body);
    }

    .section {
      padding: 100px 0;
    }

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

    /* 按钮系统 */
    .btn-primary-custom {
      background-color: var(--primary);
      border: none;
      color: white;
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      font-weight: 600;
      letter-spacing: 0.03em;
      transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
      display: inline-block;
      text-decoration: none;
    }
    .btn-primary-custom:hover {
      background-color: var(--primary-hover);
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
      color: white;
    }
    .btn-primary-custom:active {
      transform: scale(0.97);
    }
    .btn-primary-custom:focus-visible {
      outline: 2px solid var(--secondary);
      outline-offset: 2px;
    }

    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      border-radius: var(--radius-btn);
      padding: 14px 32px;
      font-weight: 600;
      letter-spacing: 0.03em;
      transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
      display: inline-block;
      text-decoration: none;
    }
    .btn-outline-custom:hover {
      background-color: var(--primary);
      color: white;
      border-color: var(--primary);
    }

    .btn-accent {
      background-color: var(--accent);
      border: none;
      color: white;
      border-radius: var(--radius-btn);
      padding: 16px 36px;
      font-weight: 600;
      letter-spacing: 0.03em;
      transition: all 0.3s ease;
      display: inline-block;
      text-decoration: none;
      box-shadow: 0 4px 12px rgba(231, 111, 81, 0.25);
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
      box-shadow: 0 8px 20px rgba(231, 111, 81, 0.35);
      transform: translateY(-2px);
      color: white;
    }

    /* 导航胶囊 */
    .navbar-capsule {
      position: fixed;
      top: 16px;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 40px);
      max-width: 1100px;
      z-index: 1030;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-radius: var(--radius-pill);
      border: 1px solid var(--border-active);
      box-shadow: 0 2px 20px rgba(0,0,0,0.06);
      padding: 12px 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .logo-text {
      font-weight: 700;
      font-size: 24px;
      color: var(--primary);
      letter-spacing: 0.5px;
      text-decoration: none;
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-link-item {
      color: var(--text-body);
      text-decoration: none;
      font-weight: 500;
      font-size: 15px;
      transition: color 0.2s;
      position: relative;
      padding-bottom: 4px;
    }
    .nav-link-item:hover {
      color: var(--primary);
    }
    .nav-link-item.active {
      color: var(--primary);
    }
    .nav-link-item.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 3px;
      background-color: var(--primary);
      border-radius: 3px;
    }

    /* Hero 区域 */
    .hero-section {
      padding: 160px 0 100px;
      background-color: var(--bg-light);
    }
    .hero-illustration {
      width: 100%;
      height: auto;
      border-radius: 24px;
      box-shadow: var(--shadow-md);
    }
    .hero-data-card {
      background: white;
      border-radius: 16px;
      padding: 16px 20px;
      box-shadow: var(--shadow-sm);
      display: inline-block;
      margin-top: 20px;
    }

    /* 卡片通用 */
    .card-custom {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
      height: 100%;
    }
    .card-custom:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .card-custom.featured {
      border-top: 4px solid var(--accent);
      transform: translateY(-6px);
    }

    /* 数据卡片 */
    .metric-number {
      font-family: var(--font-number);
      font-size: 48px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
    }
    .metric-label {
      font-weight: 600;
      color: var(--text-dark);
    }

    /* 证言区 */
    .testimonial-bg {
      background-color: var(--bg-dark);
    }
    .testimonial-card {
      background: rgba(255,255,255,0.08);
      border-radius: 16px;
      padding: 32px;
      color: var(--text-on-dark);
    }
    .quote-icon {
      color: var(--secondary);
      font-size: 32px;
      opacity: 0.7;
    }

    /* FAQ 手风琴覆盖 */
    .accordion-button:not(.collapsed) {
      background-color: #F0F7F4;
      color: var(--primary);
      box-shadow: none;
      font-weight: 600;
    }
    .accordion-button {
      font-weight: 600;
      border-radius: 10px !important;
    }
    .accordion-item {
      border: 1px solid var(--border-subtle);
      border-radius: 10px;
      margin-bottom: 12px;
    }

    /* 深色CTA */
    .cta-banner {
      background: linear-gradient(135deg, #1A5F4A 0%, #144D3C 100%);
    }

    /* 页脚 */
    .footer-dark {
      background: #1E2D2B;
      color: #A0B0AB;
    }
    .footer-link {
      color: #A0B0AB;
      text-decoration: none;
      transition: color 0.2s;
    }
    .footer-link:hover {
      color: var(--secondary);
    }

    /* 移动端调整 */
    @media (max-width: 992px) {
      h1 { font-size: 36px; }
      h2 { font-size: 28px; }
      .navbar-capsule { width: 95%; }
    }
    @media (max-width: 768px) {
      .section { padding: 70px 0; }
      .navbar-capsule { padding: 10px 20px; }
      .card-custom:hover { transform: none; }
      .hero-section { padding-top: 130px; }
      h1 { font-size: 30px; }
      .btn-primary-custom, .btn-outline-custom, .btn-accent { padding: 12px 24px; width: 100%; text-align: center; }
      .nav-links { display: none; }
      .mobile-menu-toggle { display: block; }
    }
    @media (min-width: 769px) {
      .mobile-menu-toggle { display: none; }
    }