/* roulang page: index */
:root {
      --primary: #C85A3A;
      --primary-dark: #A8472E;
      --secondary: #2B1F1D;
      --accent: #F2A65A;
      --bg-warm: #FFF9F5;
      --card-bg: #FFFFFF;
      --text-primary: #2B1F1D;
      --text-secondary: #5D4A45;
      --text-muted: #7B6A64;
      --border-light: rgba(200,90,58,0.12);
      --shadow-card: 0 4px 20px rgba(200,90,58,0.08);
      --shadow-hover: 0 8px 30px rgba(200,90,58,0.15);
      --radius-card: 16px;
      --radius-btn: 12px;
      --radius-input: 8px;
      --font-serif: 'Noto Serif SC', 'Times New Roman', serif;
      --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-primary);
      line-height: 1.6;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, .serif {
      font-family: var(--font-serif);
      font-weight: 600;
      letter-spacing: -0.02em;
    }

    h2 {
      font-size: 2.2rem;
      color: var(--secondary);
      margin-bottom: 1.2rem;
    }

    .section-title {
      position: relative;
      display: inline-block;
    }
    .section-title::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: -8px;
      width: 60%;
      height: 3px;
      background: var(--accent);
      border-radius: 4px;
    }

    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 导航自定义覆盖 Bootstrap */
    .navbar {
      background: rgba(255, 249, 245, 0.9);
      backdrop-filter: blur(12px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.03);
      padding: 0.8rem 0;
    }
    .navbar-brand {
      font-family: var(--font-serif);
      font-weight: 700;
      font-size: 1.8rem;
      color: var(--primary) !important;
      letter-spacing: 1px;
    }
    .navbar-nav .nav-link {
      color: var(--text-primary) !important;
      font-weight: 500;
      margin: 0 0.5rem;
      transition: color 0.2s;
    }
    .navbar-nav .nav-link:hover {
      color: var(--primary) !important;
    }
    .btn-cta-nav {
      background: var(--primary);
      color: white;
      border-radius: var(--radius-btn);
      padding: 0.7rem 1.8rem;
      font-weight: 600;
      font-size: 1.1rem;
      box-shadow: 0 4px 12px rgba(200,90,58,0.3);
      transition: all 0.2s ease;
      border: none;
      white-space: nowrap;
    }
    .btn-cta-nav:hover {
      background: var(--primary-dark);
      transform: scale(1.03);
      color: white;
      box-shadow: 0 6px 18px rgba(200,90,58,0.4);
    }

    /* Hero */
    #hero {
      background: linear-gradient(180deg, #C85A3A 0%, #8B3A2A 100%);
      min-height: 80vh;
      display: flex;
      align-items: center;
      color: white;
      padding: 6rem 0 4rem;
    }
    .hero-image {
      width: 100%;
      max-width: 500px;
      border-radius: 32px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.3), inset 0 0 20px rgba(255,255,255,0.15);
    }
    .btn-primary-custom {
      background: var(--accent);
      border: none;
      color: var(--secondary);
      font-weight: 700;
      padding: 1rem 2.5rem;
      border-radius: var(--radius-btn);
      font-size: 1.2rem;
      transition: 0.2s;
      box-shadow: 0 8px 18px rgba(242,166,90,0.4);
    }
    .btn-primary-custom:hover {
      background: #e5943b;
      transform: scale(1.03);
      color: var(--secondary);
    }

    /* 痛点卡片 */
    .pain-card {
      background: #FFFFFF;
      border-radius: var(--radius-card);
      padding: 2rem 1.5rem;
      box-shadow: var(--shadow-card);
      transition: all 0.25s;
      border: none;
      height: 100%;
    }
    .pain-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .icon-circle {
      width: 56px;
      height: 56px;
      background: rgba(200,90,58,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 1.8rem;
      margin-bottom: 1.2rem;
    }

    /* 解决方案卡片 */
    .solution-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      transition: 0.25s;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .solution-card:hover {
      box-shadow: var(--shadow-hover);
    }
    .solution-img {
      width: 100%;
      height: 220px;
      object-fit: cover;
    }
    .badge-custom {
      background: rgba(242,166,90,0.2);
      color: var(--primary-dark);
      font-weight: 600;
      padding: 0.3rem 1rem;
      border-radius: 30px;
      font-size: 0.9rem;
      display: inline-block;
      margin: 0.8rem 0;
    }

    /* 数据墙 */
    .stat-number {
      font-size: 3.4rem;
      font-weight: 700;
      color: var(--accent);
      font-family: var(--font-serif);
      line-height: 1.1;
    }
    .stat-label {
      font-size: 1rem;
      color: var(--text-secondary);
      font-weight: 500;
    }

    /* 证言卡片 */
    .testimonial-card {
      background: white;
      border-radius: var(--radius-card);
      padding: 2rem;
      box-shadow: var(--shadow-card);
      border-left: 5px solid var(--primary);
      height: 100%;
    }
    .avatar {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      object-fit: cover;
      margin-right: 1rem;
    }
    .stars i {
      color: var(--accent);
      margin-right: 2px;
    }

    /* FAQ手风琴 */
    .accordion-button:not(.collapsed) {
      background-color: rgba(200,90,58,0.05);
      color: var(--primary);
      font-weight: 600;
    }
    .accordion-button:focus {
      box-shadow: 0 0 0 0.2rem rgba(200,90,58,0.25);
      border-color: var(--primary);
    }

    /* 最终CTA */
    #contact {
      background: var(--secondary);
      padding: 4rem 0;
    }
    .btn-final-cta {
      background: var(--accent);
      color: var(--secondary);
      font-weight: 700;
      padding: 1.1rem 3rem;
      border-radius: 60px;
      font-size: 1.3rem;
      border: none;
      transition: 0.25s;
      box-shadow: 0 10px 25px rgba(242,166,90,0.4);
    }
    .btn-final-cta:hover {
      background: #e5943b;
      transform: scale(1.04);
      box-shadow: 0 14px 30px rgba(242,166,90,0.6);
    }

    footer {
      background: #1F1412;
      color: #D6C6C0;
    }
    footer a {
      color: #D6C6C0;
      text-decoration: none;
    }
    footer a:hover {
      color: var(--accent);
    }

    @media (max-width: 768px) {
      h2 { font-size: 1.9rem; }
      .hero-image { max-width: 280px; margin: 2rem auto 0; }
      .navbar-collapse { background: rgba(255,249,245,0.98); padding: 1rem; border-radius: 16px; }
    }