/* roulang page: index */
:root {
      --primary: #1A2744;
      --primary-soft: #253456;
      --accent: #D49B3E;
      --accent-hover: #B8832E;
      --bg: #F7F8FA;
      --surface: #FFFFFF;
      --text: #3A3F4B;
      --text-muted: #7B818C;
      --border: #E5E7EB;
      --red-soft: #FEF2F2;
      --red-border: #E05D5D;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-badge: 20px;
      --shadow-card: 0 2px 12px rgba(26,39,68,0.06);
      --shadow-hover: 0 8px 24px rgba(26,39,68,0.12);
      --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      --section-padding: 80px 0;
    }
    * {
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      color: var(--accent);
      text-decoration: none;
      transition: color 0.2s;
    }
    a:hover {
      color: var(--accent-hover);
    }
    .section {
      padding: var(--section-padding);
    }
    @media (max-width: 768px) {
      .section {
        padding: 60px 0;
      }
    }
    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    /* 导航 */
    .navbar-custom {
      background-color: var(--primary);
      height: 72px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    }
    .navbar-brand {
      font-weight: 700;
      font-size: 22px;
      letter-spacing: 0.5px;
      color: white !important;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .navbar-brand i {
      font-size: 26px;
      color: var(--accent);
    }
    .nav-link-custom {
      color: rgba(255,255,255,0.85) !important;
      font-weight: 500;
      font-size: 15px;
      padding: 6px 14px !important;
      transition: 0.2s;
      border-bottom: 2px solid transparent;
      margin: 0 2px;
    }
    .nav-link-custom:hover,
    .nav-link-custom.active {
      color: white !important;
      border-bottom-color: var(--accent);
      opacity: 1;
    }
    .badge-pulse {
      background: var(--accent);
      color: white;
      font-size: 12px;
      padding: 6px 14px;
      border-radius: var(--radius-badge);
      font-weight: 600;
      animation: pulse-badge 2s infinite;
      margin-left: 12px;
      white-space: nowrap;
    }
    @keyframes pulse-badge {
      0% { box-shadow: 0 0 0 0 rgba(212,155,62,0.5); }
      70% { box-shadow: 0 0 0 8px rgba(212,155,62,0); }
      100% { box-shadow: 0 0 0 0 rgba(212,155,62,0); }
    }
    .navbar-toggler {
      border: none;
      color: white;
      font-size: 24px;
    }
    .navbar-toggler:focus {
      box-shadow: none;
    }
    @media (max-width: 991px) {
      .navbar-collapse {
        background: var(--primary);
        padding: 16px;
        border-radius: 0 0 var(--radius-card) var(--radius-card);
      }
    }
    /* Hero */
    .hero {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      position: relative;
      min-height: 520px;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(26,39,68,0.88) 0%, rgba(26,39,68,0.75) 100%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      color: white;
      padding: 20px;
    }
    .hero h1 {
      font-size: 42px;
      font-weight: 700;
      letter-spacing: 0.5px;
      line-height: 1.2;
      margin-bottom: 16px;
    }
    .hero .lead {
      font-size: 18px;
      opacity: 0.9;
      margin-bottom: 28px;
    }
    .btn-primary-custom {
      background: var(--accent);
      border: none;
      color: white;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      transition: all 0.25s ease;
    }
    .btn-primary-custom:hover {
      background: var(--accent-hover);
      color: white;
      transform: translateY(-2px);
    }
    .btn-outline-light-custom {
      background: transparent;
      border: 2px solid white;
      color: white;
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      transition: all 0.25s ease;
    }
    .btn-outline-light-custom:hover {
      background: white;
      color: var(--primary);
    }
    @media (max-width: 768px) {
      .hero {
        min-height: 420px;
      }
      .hero h1 {
        font-size: 28px;
      }
      .btn-primary-custom,
      .btn-outline-light-custom {
        width: 100%;
        margin-bottom: 10px;
      }
    }
    /* 区块标题 */
    .section-title {
      font-size: 32px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 12px;
    }
    .section-subtitle {
      color: var(--text-muted);
      font-size: 16px;
      margin-bottom: 48px;
    }
    @media (max-width: 768px) {
      .section-title {
        font-size: 26px;
      }
      .section-subtitle {
        margin-bottom: 32px;
      }
    }
    /* 卡片 */
    .card-custom {
      background: var(--surface);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      padding: 24px;
      height: 100%;
      transition: all 0.25s ease;
      border: 1px solid var(--border);
    }
    .card-custom:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .pain-card {
      border-left: 4px solid var(--red-border);
      background: #FFFFFF;
      border-radius: var(--radius-card);
      padding: 20px 24px;
      margin-bottom: 20px;
    }
    .icon-accent {
      color: var(--accent);
      font-size: 40px;
      margin-bottom: 16px;
    }
    /* 数据深色区 */
    .results-section {
      background: var(--primary);
    }
    .stat-number {
      font-size: 48px;
      font-weight: 700;
      color: var(--accent);
      line-height: 1.1;
    }
    .stat-label {
      color: rgba(255,255,255,0.8);
      font-size: 14px;
      margin-top: 8px;
    }
    /* 证言 */
    .testimonial-card {
      background: #FAFBFC;
      border-radius: var(--radius-card);
      padding: 24px;
      font-style: italic;
    }
    .avatar {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: 600;
    }
    /* FAQ */
    .accordion-button:not(.collapsed) {
      background: white;
      color: var(--primary);
      box-shadow: none;
    }
    .accordion-button:focus {
      box-shadow: none;
      border-color: var(--border);
    }
    .accordion-item {
      border: none;
      border-bottom: 1px solid var(--border);
    }
    /* CTA */
    .cta-section {
      background: var(--accent);
    }
    .cta-section .btn-light-custom {
      background: white;
      color: var(--accent);
      font-weight: 700;
      padding: 16px 36px;
      border-radius: var(--radius-btn);
      transition: 0.2s;
    }
    .cta-section .btn-light-custom:hover {
      background: #f0f0f0;
    }
    /* Footer */
    .footer {
      background: var(--primary);
      color: rgba(255,255,255,0.7);
      padding: 60px 0 20px;
    }
    .footer a {
      color: rgba(255,255,255,0.7);
      text-decoration: none;
    }
    .footer a:hover {
      color: var(--accent);
    }
    .footer h5 {
      color: white;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.1);
      padding-top: 20px;
      margin-top: 40px;
      text-align: center;
      color: rgba(255,255,255,0.5);
      font-size: 14px;
    }