/* roulang page: index */
:root {
      --primary-gold: #C7923E;
      --primary-gold-hover: #A6772E;
      --dark-steel: #1E1B18;
      --bg-warm: #F7F3ED;
      --surface-white: #FFFFFF;
      --text-body: #2C2825;
      --text-muted: #6B625B;
      --accent-green: #4A6B5A;
      --border-warm: #E3DDD6;
      --card-shadow: 0 4px 20px rgba(28, 25, 21, 0.06);
      --card-shadow-hover: 0 8px 30px rgba(28, 25, 21, 0.12);
      --border-radius-card: 8px;
      --border-radius-btn: 6px;
      --font-serif: 'Noto Serif SC', serif;
      --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
      --transition-base: 0.25s ease;
      --container-max: 1200px;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-body);
      line-height: 1.8;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    h1, h2, h3, h4, .serif-title {
      font-family: var(--font-serif);
      font-weight: 700;
      letter-spacing: normal;
    }
    h1 {
      font-size: 3.5rem;
      line-height: 1.2;
      color: var(--dark-steel);
    }
    h2 {
      font-size: 2.5rem;
      color: var(--dark-steel);
      margin-bottom: 1rem;
    }
    h3 {
      font-size: 1.5rem;
      color: var(--dark-steel);
      margin-bottom: 0.75rem;
    }
    .section-subtitle {
      font-size: 1.25rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto 2rem auto;
    }
    p {
      font-size: 1rem;
      color: var(--text-body);
      max-width: 680px;
    }
    .container-custom {
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    /* 卡片通用样式 */
    .custom-card {
      background: var(--surface-white);
      border-radius: var(--border-radius-card);
      box-shadow: var(--card-shadow);
      padding: 2rem;
      transition: transform var(--transition-base), box-shadow var(--transition-base);
      border: none;
      height: 100%;
      position: relative;
      overflow: hidden;
    }
    .custom-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
    }
    .card-top-strip {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background-color: var(--primary-gold);
      transition: height 0.2s ease;
    }
    .custom-card:hover .card-top-strip {
      height: 6px;
    }
    /* 按钮样式 */
    .btn-primary-custom {
      background-color: var(--primary-gold);
      border: 2px solid var(--primary-gold);
      color: var(--dark-steel);
      font-weight: 600;
      border-radius: var(--border-radius-btn);
      padding: 0.75rem 2rem;
      transition: all var(--transition-base);
      font-family: var(--font-sans);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
    }
    .btn-primary-custom:hover {
      background-color: var(--primary-gold-hover);
      border-color: var(--primary-gold-hover);
      color: var(--dark-steel);
      transform: translateY(-2px);
    }
    .btn-outline-custom {
      background: transparent;
      border: 2px solid var(--dark-steel);
      color: var(--dark-steel);
      font-weight: 600;
      border-radius: var(--border-radius-btn);
      padding: 0.75rem 2rem;
      transition: all var(--transition-base);
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-outline-custom:hover {
      background-color: var(--dark-steel);
      color: var(--bg-warm);
      border-color: var(--dark-steel);
      transform: translateY(-2px);
    }
    /* 导航卡片化 */
    .navbar-panel {
      position: fixed;
      top: 1rem;
      left: 50%;
      transform: translateX(-50%);
      width: calc(100% - 2rem);
      max-width: 1100px;
      background: rgba(247, 243, 237, 0.92);
      backdrop-filter: blur(12px);
      border-radius: 12px;
      padding: 0.75rem 1.5rem;
      box-shadow: 0 4px 18px rgba(28,25,21,0.08);
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: all 0.3s ease;
    }
    .nav-icons-group {
      display: flex;
      gap: 0.75rem;
      align-items: center;
    }
    .nav-icon-card {
      width: 34px;
      height: 34px;
      background: var(--dark-steel);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-gold);
      font-size: 1rem;
      transition: all 0.2s;
      text-decoration: none;
    }
    .nav-icon-card:hover {
      background: var(--primary-gold);
      color: var(--dark-steel);
    }
    .logo-area {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 1.4rem;
      color: var(--dark-steel);
      display: flex;
      align-items: center;
      gap: 0.4rem;
    }
    .logo-icon {
      color: var(--primary-gold);
      font-size: 1.8rem;
    }
    /* 移动端底部导航 */
    @media (max-width: 767.98px) {
      .navbar-panel {
        top: auto;
        bottom: 0.75rem;
        width: 95%;
        padding: 0.5rem 1rem;
        border-radius: 16px;
        background: rgba(30,27,24,0.92);
        backdrop-filter: blur(12px);
      }
      .desktop-cta {
        display: none;
      }
      .logo-area {
        display: none;
      }
      .nav-icons-group {
        width: 100%;
        justify-content: space-around;
      }
      .nav-icon-card {
        background: transparent;
        color: var(--bg-warm);
        width: 44px;
        height: 44px;
        font-size: 1.3rem;
      }
      .nav-icon-card:hover {
        background: var(--primary-gold);
        color: var(--dark-steel);
      }
      h1 {
        font-size: 2.5rem;
      }
      h2 {
        font-size: 2rem;
      }
    }
    /* Hero区域 */
    .hero-img-wrapper img {
      border-radius: 12px;
      box-shadow: 0 12px 30px rgba(0,0,0,0.15);
      width: 100%;
      height: auto;
    }
    .pain-point-badge {
      background: var(--dark-steel);
      color: var(--primary-gold);
      font-weight: 500;
      padding: 0.4rem 1rem;
      border-radius: 20px;
      font-size: 0.9rem;
      display: inline-block;
      margin-bottom: 1.5rem;
    }
    /* 成果数字区块 */
    .stats-dark {
      background: var(--dark-steel);
      border-radius: 16px;
      padding: 3rem 2rem;
    }
    .stat-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--primary-gold);
      line-height: 1.2;
    }
    .stat-label {
      color: var(--bg-warm);
      font-size: 0.95rem;
      opacity: 0.9;
    }
    /* FAQ 自定义 */
    .accordion-custom .accordion-item {
      background: var(--bg-warm);
      border: none;
      border-radius: 8px;
      margin-bottom: 1rem;
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }
    .accordion-custom .accordion-button {
      background: var(--bg-warm);
      color: var(--dark-steel);
      font-weight: 600;
      box-shadow: none;
      border-radius: 8px;
      padding: 1.2rem 1.5rem;
      font-family: var(--font-sans);
    }
    .accordion-custom .accordion-button:not(.collapsed) {
      color: var(--primary-gold);
      background: var(--bg-warm);
      box-shadow: none;
    }
    .accordion-custom .accordion-button::after {
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      content: "\f067";
      background-image: none;
      font-size: 1rem;
    }
    .accordion-custom .accordion-button:not(.collapsed)::after {
      content: "\f068";
      color: var(--primary-gold);
    }
    .accordion-body {
      border-left: 3px solid var(--primary-gold);
      margin-left: 1rem;
      padding: 0.8rem 1.5rem;
      color: var(--text-body);
    }
    /* 证言卡片 */
    .testimonial-card {
      background: var(--bg-warm);
      border-radius: 12px;
      padding: 2rem;
      position: relative;
      box-shadow: 0 4px 16px rgba(0,0,0,0.04);
      font-style: italic;
    }
    .quote-mark {
      font-size: 4rem;
      color: var(--primary-gold);
      line-height: 0;
      font-family: var(--font-serif);
      position: absolute;
      top: 1rem;
      left: 1.5rem;
    }
    footer {
      background: var(--dark-steel);
      color: #f0ebe4;
    }
    footer a {
      color: #d4af6a;
      text-decoration: none;
    }
    footer a:hover {
      color: var(--primary-gold);
    }
    .footer-logo {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 1.6rem;
      color: white;
    }
    /* 图片占位调整 */
    .cover-img {
      border-radius: 8px;
      width: 100%;
      height: auto;
      aspect-ratio: 16/10;
      object-fit: cover;
    }
    .back-img {
      border-radius: 12px;
      width: 100%;
      height: auto;
    }