/* roulang page: index */
:root {
      --primary: #E43D2A;
      --primary-dark: #C0392B;
      --secondary: #1A1A2E;
      --warm-bg: #F5F0E8;
      --accent-gold: #FFB800;
      --gray-light: #F2F2F5;
      --gray-mid: #6B7280;
      --gray-border: #E5E7EB;
      --white: #FFFFFF;
      --body-font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      --number-font: "Inter", "Poppins", sans-serif;
      --border-radius-lg: 16px;
      --border-radius-xl: 20px;
      --shadow-sm: 0 2px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 28px rgba(0,0,0,0.10);
      --transition-base: 0.25s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--body-font);
      background-color: var(--white);
      color: #1F2937;
      line-height: 1.6;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, h4 {
      font-weight: 600;
      letter-spacing: -0.3px;
    }
    
    a {
      text-decoration: none;
      transition: var(--transition-base);
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    
    /* 卡片化导航面板 */
    .navbar-card {
      position: fixed;
      top: 20px;
      left: 50%;
      transform: translateX(-50%);
      width: 90%;
      max-width: 1200px;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-radius: var(--border-radius-xl);
      padding: 12px 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: 0 4px 20px rgba(0,0,0,0.06);
      z-index: 1000;
      border: 1px solid rgba(228, 61, 42, 0.1);
    }
    
    .logo-text {
      font-family: var(--number-font);
      font-weight: 700;
      font-size: 28px;
      color: var(--primary);
      letter-spacing: -0.5px;
      line-height: 1;
    }
    
    .nav-icon-group {
      display: flex;
      gap: 20px;
      align-items: center;
    }
    
    .nav-icon-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      width: 54px;
      height: 54px;
      background: transparent;
      border-radius: 14px;
      transition: var(--transition-base);
      color: #374151;
      cursor: pointer;
    }
    
    .nav-icon-item i {
      font-size: 22px;
      margin-bottom: 2px;
    }
    
    .nav-icon-label {
      font-size: 11px;
      font-weight: 500;
      color: #4B5563;
    }
    
    .nav-icon-item:hover {
      background: rgba(228, 61, 42, 0.08);
      color: var(--primary);
    }
    
    .btn-primary-custom {
      background: linear-gradient(135deg, #E43D2A 0%, #C0392B 100%);
      border: none;
      color: white;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: 50px;
      font-size: 16px;
      transition: all 0.25s ease;
      box-shadow: 0 4px 14px rgba(228, 61, 42, 0.3);
      letter-spacing: 0.3px;
    }
    
    .btn-primary-custom:hover {
      background: linear-gradient(135deg, #f0543e 0%, #d94335 100%);
      transform: scale(1.03);
      color: white;
      box-shadow: 0 8px 22px rgba(228, 61, 42, 0.4);
    }
    
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 10px 28px;
      border-radius: 50px;
      font-size: 16px;
      transition: all 0.25s ease;
    }
    
    .btn-outline-custom:hover {
      background: rgba(228, 61, 42, 0.06);
      border-color: var(--primary-dark);
      color: var(--primary-dark);
    }
    
    /* 区块间距 */
    section {
      padding: 100px 0;
    }
    
    .section-title {
      font-size: 36px;
      font-weight: 600;
      margin-bottom: 18px;
      color: #111827;
    }
    
    .section-sub {
      font-size: 18px;
      color: #4B5563;
      max-width: 680px;
      margin: 0 auto 50px;
    }
    
    /* 卡片通用 */
    .card-custom {
      background: var(--white);
      border-radius: var(--border-radius-lg);
      box-shadow: var(--shadow-sm);
      transition: all var(--transition-base);
      border: 1px solid rgba(0,0,0,0.03);
      height: 100%;
    }
    
    .card-custom:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: rgba(228, 61, 42, 0.15);
    }
    
    /* 痛点暗卡 */
    .pain-card {
      background: #F2F2F5;
      border-radius: var(--border-radius-lg);
      padding: 28px 24px;
      border-left: 5px solid rgba(228, 61, 42, 0.7);
      transition: var(--transition-base);
    }
    
    /* 数据徽章 */
    .badge-gold {
      background: linear-gradient(135deg, #FFB800 0%, #FF9F00 100%);
      color: #1A1A2E;
      font-weight: 700;
      font-family: var(--number-font);
      border-radius: 50px;
      padding: 6px 18px;
      font-size: 18px;
      display: inline-block;
      letter-spacing: 0.5px;
    }
    
    .stat-number {
      font-family: var(--number-font);
      font-size: 48px;
      font-weight: 700;
      color: var(--accent-gold);
      line-height: 1.1;
    }
    
    /* 证言卡片 */
    .testimonial-card {
      background: white;
      border-radius: var(--border-radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }
    
    .stars i {
      color: var(--accent-gold);
      font-size: 18px;
      margin-right: 2px;
    }
    
    /* FAQ手风琴重塑 */
    .accordion-button:not(.collapsed) {
      background-color: #FFF5F3;
      color: var(--primary);
      box-shadow: none;
      border-color: var(--primary);
      font-weight: 600;
    }
    
    .accordion-item {
      border: 1px solid var(--gray-border);
      border-radius: 12px !important;
      margin-bottom: 16px;
      overflow: hidden;
    }
    
    .accordion-button {
      font-weight: 600;
      font-size: 18px;
      background: white;
    }
    
    /* 终局CTA */
    .cta-final {
      background: linear-gradient(135deg, #E43D2A 0%, #1A1A2E 100%);
      border-radius: 32px;
      padding: 70px 40px;
      position: relative;
      overflow: hidden;
    }
    
    .footer-dark {
      background: #1A1A2E;
      color: #CCCCCC;
    }
    
    .footer-dark a {
      color: #CCCCCC;
    }
    
    .footer-dark a:hover {
      color: var(--primary);
    }
    
    @media (max-width: 992px) {
      .navbar-card {
        padding: 12px 18px;
      }
      .nav-icon-group {
        gap: 8px;
      }
      .nav-icon-item {
        width: 48px;
        height: 48px;
      }
      section {
        padding: 70px 0;
      }
    }
    
    @media (max-width: 768px) {
      .navbar-card {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
        top: 10px;
        padding: 15px;
      }
      .nav-icon-group {
        order: 3;
        width: 100%;
        justify-content: center;
      }
      h1 {
        font-size: 38px !important;
      }
      .section-title {
        font-size: 30px;
      }
    }