/* roulang page: index */
:root {
      --primary: #E03E2D;
      --primary-dark: #C53020;
      --secondary-dark: #1A1A2E;
      --accent-gold: #F5A623;
      --bg-light: #FAFAFA;
      --card-bg: #FFFFFF;
      --text-title: #1A1A2E;
      --text-body: #4A4A5A;
      --text-muted: #8A8A9A;
      --success: #0ECB7B;
      --border-light: #F0F0F0;
      --border-input: #E0E0E0;
      --shadow-sm: 0 2px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-sm: 8px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Inter", "SF Pro Display", sans-serif;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.75;
      margin: 0;
      overflow-x: hidden;
    }
    h1, h2, h3, h4 {
      color: var(--text-title);
      font-weight: 700;
      letter-spacing: -0.3px;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    img {
      max-width: 100%;
      display: block;
    }
    /* 导航卡片化面板 */
    .navbar-custom {
      background: var(--card-bg);
      box-shadow: var(--shadow-sm);
      padding: 12px 0;
      backdrop-filter: blur(8px);
      background: rgba(255,255,255,0.92);
      border-radius: 0 0 var(--radius-card) var(--radius-card);
      margin: 0 auto;
      max-width: 1200px;
      width: 100%;
    }
    .navbar-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
    }
    .logo-brand {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 6px;
      letter-spacing: -1px;
    }
    .logo-brand i {
      font-size: 32px;
      color: var(--accent-gold);
      filter: drop-shadow(0 0 6px rgba(245,166,35,0.6));
    }
    .nav-cards-group {
      display: flex;
      gap: 8px;
      align-items: center;
      flex-wrap: wrap;
    }
    .nav-card-item {
      background: #F5F5F7;
      border-radius: var(--radius-sm);
      padding: 8px 16px;
      display: flex;
      align-items: center;
      gap: 6px;
      font-weight: 600;
      font-size: 15px;
      color: var(--text-title);
      transition: all 0.2s ease;
      border: 1px solid transparent;
    }
    .nav-card-item i {
      font-size: 16px;
      color: var(--primary);
    }
    .nav-card-item:hover, .nav-card-item.active {
      background: rgba(224,62,45,0.05);
      border-bottom: 3px solid var(--primary);
      color: var(--primary);
    }
    .cta-nav-card {
      background: var(--primary);
      color: white;
      border-radius: var(--radius-sm);
      padding: 10px 22px;
      font-weight: 700;
      border: none;
      box-shadow: 0 4px 10px rgba(224,62,45,0.3);
      transition: 0.2s;
    }
    .cta-nav-card:hover {
      background: var(--primary-dark);
      color: white;
      transform: translateY(-1px);
      box-shadow: 0 6px 14px rgba(224,62,45,0.4);
    }
    /* 移动端汉堡菜单 */
    .navbar-toggler-custom {
      background: transparent;
      border: none;
      font-size: 24px;
      color: var(--text-title);
    }
    @media (max-width: 991px) {
      .nav-cards-group {
        display: none;
        width: 100%;
        flex-direction: column;
        background: white;
        padding: 16px;
        border-radius: 16px;
        margin-top: 12px;
        box-shadow: var(--shadow-md);
      }
      .nav-cards-group.show {
        display: flex;
      }
    }
    /* Hero区域 */
    .hero-section {
      padding: 40px 0 60px;
    }
    .hero-left h1 {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 16px;
      color: var(--secondary-dark);
    }
    .hero-left .subtitle {
      font-size: 18px;
      color: var(--text-body);
      margin-bottom: 24px;
    }
    .micro-cards {
      display: flex;
      gap: 16px;
      margin-bottom: 32px;
    }
    .micro-card {
      background: var(--card-bg);
      padding: 12px 20px;
      border-radius: var(--radius-sm);
      box-shadow: 0 1px 4px rgba(0,0,0,0.02);
      border-bottom: 1px solid #eee;
    }
    .micro-card .number {
      font-size: 32px;
      font-weight: 700;
      color: var(--primary);
    }
    .hero-right {
      position: relative;
    }
    .hero-img {
      border-radius: 24px;
      box-shadow: var(--shadow-md);
      width: 100%;
      height: auto;
      object-fit: cover;
    }
    .floating-quote {
      position: absolute;
      bottom: 20px;
      left: -10px;
      background: white;
      padding: 12px 18px;
      border-radius: 16px;
      box-shadow: var(--shadow-md);
      font-weight: 600;
      color: var(--secondary-dark);
      border-left: 4px solid var(--accent-gold);
    }
    .btn-primary-custom {
      background: var(--primary);
      border: none;
      color: white;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      transition: 0.2s;
      box-shadow: 0 4px 12px rgba(224,62,45,0.25);
    }
    .btn-primary-custom:hover {
      background: var(--primary-dark);
      box-shadow: 0 8px 18px rgba(224,62,45,0.35);
      transform: translateY(-1px);
    }
    .btn-ghost {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      transition: 0.2s;
    }
    .btn-ghost:hover {
      background: rgba(224,62,45,0.08);
    }
    /* 区域标题装饰 */
    .section-title {
      font-size: 34px;
      font-weight: 700;
      margin-bottom: 8px;
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      display: block;
      width: 60px;
      height: 6px;
      background: var(--primary);
      margin-top: 8px;
      border-radius: 2px;
    }
    /* 亮点网格卡片 */
    .feature-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      border-top: 4px solid var(--accent-gold);
      transition: all 0.25s;
    }
    .feature-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .feature-icon {
      font-size: 36px;
      color: var(--primary);
    }
    .badge-custom {
      background: rgba(245,166,35,0.15);
      color: #b45309;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 20px;
    }
    /* 案例卡片 */
    .case-card {
      border-radius: var(--radius-card);
      overflow: hidden;
      background: white;
      box-shadow: var(--shadow-sm);
      transition: 0.2s;
      break-inside: avoid;
      margin-bottom: 24px;
    }
    .case-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .case-img {
      width: 100%;
      height: auto;
      aspect-ratio: 16/9;
      object-fit: cover;
      transition: transform 0.3s;
    }
    .case-card:hover .case-img {
      transform: scale(1.03);
    }
    /* 对比卡片 */
    .compare-card {
      background: white;
      border-radius: 20px;
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: 0.2s;
    }
    .compare-card.recommended {
      border: 2px solid var(--primary);
      transform: translateY(-12px);
      box-shadow: 0 20px 30px rgba(224,62,45,0.15);
    }
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background-color: #f9f9fb;
      color: var(--primary);
      font-weight: 700;
    }
    .faq-decor-card {
      background: #f0f2ff;
      border-radius: 24px;
      padding: 32px;
      text-align: center;
    }
    /* CTA深色区 */
    .cta-dark {
      background: var(--secondary-dark);
      background-image: radial-gradient(circle at 20% 30%, rgba(224,62,45,0.08) 0%, transparent 40%);
    }
    .form-control-custom {
      border-radius: 6px;
      border: 1px solid var(--border-input);
      padding: 12px;
    }
    .form-control-custom:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(224,62,45,0.2);
    }
    footer {
      background: #16162a;
      color: #aaa;
    }
    .social-icon {
      width: 38px;
      height: 38px;
      border: 1px solid #555;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin: 0 5px;
      transition: 0.2s;
    }
    .social-icon:hover {
      background: var(--primary);
      border-color: var(--primary);
      color: white;
    }
    @media (max-width: 768px) {
      .hero-left h1 { font-size: 34px; }
      .section-title { font-size: 26px; }
    }