/* roulang page: index */
:root {
      --primary: #D36B2B;
      --primary-hover: #B85A1F;
      --secondary: #2B1E14;
      --bg-warm: #F9F5F0;
      --accent: #00C9A7;
      --accent-hover: #00A88C;
      --text-main: #2B1E14;
      --text-body: #4A3F38;
      --text-muted: #8C7B6E;
      --white: #FFFFFF;
      --card-shadow: 0 4px 20px rgba(43,30,20,0.08);
      --card-hover-shadow: 0 8px 30px rgba(43,30,20,0.15);
      --border-radius-card: 16px;
      --border-radius-sm: 8px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      --font-mono: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', monospace;
      --transition: all 0.25s ease;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 卡片化导航面板 */
    #nav {
      position: sticky;
      top: 16px;
      z-index: 50;
      padding: 12px 0;
    }
    .nav-panel {
      background: var(--bg-warm);
      box-shadow: 0 8px 28px rgba(43,30,20,0.12);
      border-radius: 20px;
      padding: 12px 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      backdrop-filter: blur(10px);
      background: rgba(249, 245, 240, 0.9);
      border: 1px solid rgba(211, 107, 43, 0.1);
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--primary);
      letter-spacing: 1px;
    }
    .brand i {
      font-size: 1.8rem;
      color: var(--primary);
      transform: rotate(-15deg);
    }
    .nav-links {
      display: flex;
      gap: 12px;
      align-items: center;
    }
    .nav-card {
      width: 48px;
      height: 48px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: white;
      border-radius: 14px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
      color: var(--text-muted);
      font-size: 1.2rem;
      transition: var(--transition);
      border: 1px solid transparent;
    }
    .nav-card:hover {
      background: var(--accent);
      color: white;
      border-color: var(--accent);
      transform: translateY(-2px);
      box-shadow: 0 6px 14px rgba(0,201,167,0.3);
    }
    .cta-btn {
      background: var(--accent);
      color: white;
      font-weight: 600;
      padding: 12px 24px;
      border-radius: 30px;
      font-size: 0.95rem;
      display: flex;
      align-items: center;
      gap: 6px;
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(0,201,167,0.25);
      white-space: nowrap;
      border: none;
      cursor: pointer;
    }
    .cta-btn:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(0,201,167,0.35);
      color: white;
    }

    /* 移动端底部导航 */
    .mobile-bottom-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: var(--secondary);
      backdrop-filter: blur(12px);
      padding: 10px 16px;
      justify-content: space-around;
      align-items: center;
      z-index: 99;
      border-top: 1px solid rgba(255,255,255,0.1);
      border-radius: 20px 20px 0 0;
    }
    .mobile-nav-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      color: #d4c8bc;
      font-size: 0.7rem;
      transition: var(--transition);
    }
    .mobile-nav-item i {
      font-size: 1.2rem;
      margin-bottom: 2px;
    }
    .mobile-nav-item.active {
      color: var(--accent);
    }

    /* Hero */
    #hero {
      background: linear-gradient(135deg, rgba(43,30,20,0.8) 0%, rgba(80,50,30,0.7) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 32px;
      margin-top: 24px;
      padding: 56px 40px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      color: white;
      position: relative;
      overflow: hidden;
    }
    .hero-left {
      max-width: 550px;
    }
    .hero-left h1 {
      font-size: 2.8rem;
      font-weight: 700;
      line-height: 1.2;
      color: white;
      margin-bottom: 16px;
    }
    .hero-left .sub {
      font-size: 1.2rem;
      color: rgba(255,255,240,0.9);
      margin-bottom: 24px;
    }
    .metric-cards {
      display: flex;
      flex-wrap: wrap;
      gap: 18px;
    }
    .metric-item {
      background: rgba(43,30,20,0.6);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(255,255,255,0.15);
      border-radius: 20px;
      padding: 18px 20px;
      min-width: 130px;
      text-align: center;
    }
    .metric-number {
      font-family: var(--font-mono);
      font-size: 2rem;
      font-weight: 700;
      color: var(--accent);
    }
    .metric-label {
      font-size: 0.85rem;
      color: #e0d7cc;
    }

    /* 板块通用 */
    section {
      margin: 70px 0;
    }
    h2 {
      font-size: 2rem;
      font-weight: 600;
      color: var(--secondary);
      margin-bottom: 36px;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    h2::after {
      content: '';
      flex: 1;
      height: 3px;
      background: linear-gradient(to right, var(--accent), transparent);
      border-radius: 2px;
    }

    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: white;
      border-radius: 20px;
      padding: 24px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      border-left: 4px solid transparent;
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--card-hover-shadow);
      border-left: 4px solid var(--accent);
    }
    .service-img {
      height: 140px;
      background-size: cover;
      background-position: center;
      border-radius: 14px;
      margin-bottom: 16px;
    }
    .service-card h3 {
      font-weight: 700;
      color: var(--secondary);
      margin-bottom: 8px;
    }

    /* 结果对比 */
    .compare-panels {
      display: flex;
      gap: 24px;
      flex-wrap: wrap;
    }
    .compare-card {
      flex: 1;
      background: white;
      border-radius: 24px;
      padding: 28px;
      box-shadow: var(--card-shadow);
    }
    .compare-card.winner {
      border: 2px solid var(--accent);
      background: #fafff9;
    }
    .bar-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin: 14px 0;
    }
    .progress-bg {
      width: 60%;
      height: 8px;
      background: #e9e0d5;
      border-radius: 10px;
      overflow: hidden;
    }
    .progress-fill {
      height: 100%;
      background: var(--accent);
      width: 0%;
    }

    /* FAQ */
    .accordion-item {
      background: white;
      border-radius: 14px;
      margin-bottom: 12px;
      box-shadow: 0 2px 10px rgba(0,0,0,0.02);
    }
    .accordion-title {
      background: var(--bg-warm);
      padding: 18px 24px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      border-radius: 14px;
    }
    .accordion-content {
      padding: 0 24px 18px;
      display: none;
    }

    /* CTA */
    #contact {
      background: var(--secondary);
      border-radius: 32px;
      padding: 20px;
      margin-top: 60px;
    }
    .cta-card {
      background: white;
      border-radius: 24px;
      padding: 40px;
      text-align: center;
      margin-top: -50px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    }
    .form-row {
      display: flex;
      gap: 12px;
      max-width: 600px;
      margin: 24px auto 0;
    }
    input {
      border: 1px solid #ddd0c0;
      border-radius: 30px;
      padding: 14px 20px;
      flex: 1;
    }

    footer {
      background: var(--secondary);
      color: #d4c8bc;
      padding: 40px 0 20px;
    }

    @media (max-width: 1024px) {
      .services-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .nav-panel { display: none; }
      .mobile-bottom-nav { display: flex; }
      #hero { flex-direction: column; padding: 36px 20px; }
      .services-grid { grid-template-columns: 1fr; }
      .form-row { flex-direction: column; }
      .compare-panels { flex-direction: column; }
      h2 { font-size: 1.6rem; }
    }