/* roulang page: index */
:root {
      --primary: #E83E3E;
      --primary-dark: #c53030;
      --primary-light: #FF6B6B;
      --secondary: #1A1A2E;
      --accent: #FFC107;
      --bg-light: #F8F9FA;
      --bg-warm: #FFF5F0;
      --text-title: #1A1A2E;
      --text-body: #4A4A5A;
      --text-muted: #8A8A9A;
      --border-light: rgba(0,0,0,0.04);
      --shadow-card: 0 8px 30px rgba(0,0,0,0.04);
      --shadow-card-hover: 0 16px 40px rgba(0,0,0,0.08);
      --radius-lg: 20px;
      --radius-pill: 50px;
      --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", system-ui, sans-serif;
      --font-num: "Inter", "SF Pro Display", -apple-system, sans-serif;
      --transition-smooth: 0.3s ease;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-cn);
      color: var(--text-body);
      background-color: #fff;
      line-height: 1.6;
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-family: var(--font-cn);
      color: var(--text-title);
      font-weight: 700;
    }

    h1, .h1 {
      font-size: 48px;
      line-height: 1.2;
      letter-spacing: -1px;
    }

    h2, .h2 {
      font-size: 36px;
      line-height: 1.25;
      letter-spacing: -0.5px;
    }

    h3, .h3 {
      font-size: 24px;
      line-height: 1.35;
      font-weight: 600;
    }

    p {
      font-size: 16px;
      line-height: 1.75;
    }

    .text-muted-custom {
      color: var(--text-muted) !important;
    }

    /* 按钮重置 */
    .btn-primary-custom {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      border: none;
      color: #fff;
      font-weight: 600;
      letter-spacing: 0.5px;
      border-radius: var(--radius-pill);
      padding: 14px 36px;
      transition: var(--transition-smooth);
      box-shadow: 0 8px 20px rgba(232,62,62,0.25);
      font-family: var(--font-cn);
    }

    .btn-primary-custom:hover {
      transform: scale(1.04);
      box-shadow: 0 12px 28px rgba(232,62,62,0.4);
      color: #fff;
      background: linear-gradient(135deg, #d63535 0%, #ff5a5a 100%);
    }

    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      letter-spacing: 0.5px;
      border-radius: var(--radius-pill);
      padding: 12px 34px;
      transition: var(--transition-smooth);
      font-family: var(--font-cn);
    }

    .btn-outline-custom:hover {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
    }

    .btn-light-custom {
      background: #fff;
      color: var(--primary);
      font-weight: 700;
      border-radius: var(--radius-pill);
      padding: 16px 48px;
      transition: var(--transition-smooth);
      border: none;
      box-shadow: 0 8px 20px rgba(0,0,0,0.08);
    }

    .btn-light-custom:hover {
      transform: scale(1.05);
      box-shadow: 0 16px 30px rgba(0,0,0,0.15);
      color: var(--primary-dark);
    }

    /* 导航 */
    .navbar-custom {
      background: #fff;
      box-shadow: 0 2px 12px rgba(0,0,0,0.04);
      height: 72px;
      padding: 0 1.5rem;
    }

    .navbar-brand-custom {
      font-size: 24px;
      font-weight: 700;
      color: var(--secondary) !important;
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
    }

    .nav-link-custom {
      color: var(--text-body) !important;
      font-weight: 500;
      margin: 0 0.25rem;
      padding: 0.5rem 0.75rem;
      transition: var(--transition-smooth);
      position: relative;
    }

    .nav-link-custom:hover,
    .nav-link-custom.active {
      color: var(--primary) !important;
    }

    .nav-link-custom.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0.75rem;
      right: 0.75rem;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }

    .search-box {
      background: var(--bg-light);
      border-radius: 30px;
      padding: 0.4rem 1rem;
      display: flex;
      align-items: center;
      gap: 6px;
      border: 1px solid transparent;
      transition: var(--transition-smooth);
    }

    .search-box input {
      border: none;
      background: transparent;
      outline: none;
      width: 140px;
      font-size: 14px;
      color: var(--text-body);
    }

    .search-box i {
      color: var(--text-muted);
      font-size: 16px;
    }

    /* Hero */
    #hero {
      background: linear-gradient(180deg, #FFFFFF 0%, #FFF5F0 100%);
      min-height: 560px;
      display: flex;
      align-items: center;
    }

    .hero-visual-card {
      background: var(--secondary);
      border-radius: 28px;
      padding: 1.5rem;
      box-shadow: 0 20px 40px rgba(26,26,46,0.25);
      animation: float 4s ease-in-out infinite;
    }

    @keyframes float {
      0% { transform: translateY(0); }
      50% { transform: translateY(-10px); }
      100% { transform: translateY(0); }
    }

    .pulse-dot {
      fill: var(--accent);
      animation: pulse-opacity 1.8s infinite;
    }

    @keyframes pulse-opacity {
      0%, 100% { opacity: 0.7; }
      50% { opacity: 1; }
    }

    /* 数据看板 */
    .stat-card {
      background: #fff;
      border-radius: var(--radius-lg);
      padding: 1.8rem 1.5rem;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
      height: 100%;
    }

    .stat-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card-hover);
    }

    .stat-badge {
      display: inline-flex;
      align-items: center;
      background: #FFF5E6;
      border-radius: 30px;
      padding: 4px 14px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      gap: 6px;
    }

    .stat-dot {
      width: 8px;
      height: 8px;
      background: var(--accent);
      border-radius: 50%;
      display: inline-block;
    }

    .stat-number {
      font-family: var(--font-num);
      font-size: 42px;
      font-weight: 700;
      color: var(--secondary);
      line-height: 1.2;
      margin: 0.75rem 0 0.25rem;
    }

    /* 服务卡片左侧色条 */
    .service-card {
      background: #fff;
      border-radius: var(--radius-lg);
      padding: 2rem 1.8rem;
      box-shadow: var(--shadow-card);
      transition: var(--transition-smooth);
      display: flex;
      gap: 1.5rem;
      position: relative;
      overflow: hidden;
      height: 100%;
    }

    .service-card::before {
      content: '';
      position: absolute;
      left: 0;
      top: 0;
      bottom: 0;
      width: 6px;
      background: var(--primary);
      border-radius: 0 4px 4px 0;
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-card-hover);
    }

    .service-icon-circle {
      width: 60px;
      height: 60px;
      background: rgba(232,62,62,0.08);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      color: var(--primary);
    }

    /* 对比卡 */
    .compare-card-negative {
      background: var(--bg-light);
      border-radius: var(--radius-lg);
      padding: 2rem;
      height: 100%;
    }

    .compare-card-positive {
      background: #fff;
      border: 1px solid rgba(232,62,62,0.2);
      border-radius: var(--radius-lg);
      padding: 2rem;
      height: 100%;
    }

    .progress-custom {
      height: 12px;
      border-radius: 12px;
      background: #e9ecef;
    }

    .progress-bar-custom {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      border-radius: 12px;
    }

    /* FAQ */
    .accordion-button:not(.collapsed) {
      background-color: #FFF5F0;
      color: var(--primary);
      font-weight: 600;
    }

    .accordion-button:focus {
      box-shadow: none;
      border-color: rgba(232,62,62,0.2);
    }

    .faq-q-mark {
      color: var(--primary);
      font-weight: 700;
      margin-right: 10px;
    }

    /* CTA */
    #cta {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      padding: 100px 0;
    }

    /* Footer */
    #footer {
      background: var(--secondary);
      color: #B0B0C0;
    }

    #footer a {
      color: #B0B0C0;
      text-decoration: none;
      transition: var(--transition-smooth);
    }

    #footer a:hover {
      color: #fff;
    }

    .social-icon-circle {
      width: 38px;
      height: 38px;
      border: 1px solid #5a5a6e;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-right: 8px;
      color: #B0B0C0;
      transition: var(--transition-smooth);
    }

    .social-icon-circle:hover {
      background: var(--primary);
      border-color: var(--primary);
      color: #fff;
    }

    /* 响应式 */
    @media (max-width: 768px) {
      h1, .h1 { font-size: 32px; }
      h2, .h2 { font-size: 28px; }
      .navbar-custom { height: auto; padding: 0.75rem 1rem; }
      #hero { min-height: auto; padding: 3rem 0; }
      .service-card { flex-direction: column; }
      .service-card::before { width: 100%; height: 4px; top: 0; left: 0; border-radius: 0 0 4px 4px; }
    }