/* roulang page: index */
:root {
      --primary: #C9A84C;
      --primary-hover: #B8953A;
      --primary-soft: rgba(201, 168, 76, 0.08);
      --primary-border: rgba(201, 168, 76, 0.15);
      --secondary-dark: #1A1A2E;
      --accent-red: #E94E3C;
      --bg-warm: #F5F3EF;
      --white: #FFFFFF;
      --text-main: #1A1A2E;
      --text-secondary: #5C5B5A;
      --text-light: #B0AFAD;
      --border-light: #E0DED9;
      --radius-sm: 12px;
      --radius-md: 16px;
      --radius-pill: 30px;
      --shadow-card: 0 4px 20px rgba(26, 26, 46, 0.06);
      --shadow-card-hover: 0 8px 30px rgba(26, 26, 46, 0.12);
      --shadow-glow: 0 0 16px rgba(201, 168, 76, 0.5);
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
      --transition: 0.2s ease;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-warm);
      color: var(--text-main);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      border: none;
      background: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: var(--transition);
    }

    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      box-shadow: 0 1px 0 rgba(0,0,0,0.05);
      z-index: 100;
      height: 72px;
      display: flex;
      align-items: center;
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .logo {
      font-weight: 700;
      font-size: 1.6rem;
      letter-spacing: -0.02em;
      color: var(--secondary-dark);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .logo-icon {
      font-size: 1.8rem;
      color: var(--primary);
    }

    .nav-desktop {
      display: flex;
      gap: 28px;
      align-items: center;
      font-weight: 500;
      color: var(--text-secondary);
    }

    .nav-desktop a {
      position: relative;
      padding: 8px 0;
      transition: color 0.2s;
    }

    .nav-desktop a:hover,
    .nav-desktop a.active {
      color: var(--primary);
    }

    .nav-desktop a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--primary);
      border-radius: 3px;
    }

    .nav-cta {
      background: var(--primary);
      color: var(--secondary-dark);
      padding: 10px 24px;
      border-radius: var(--radius-pill);
      font-weight: 600;
      margin-left: 16px;
    }

    .nav-cta:hover {
      background: var(--primary-hover);
      box-shadow: var(--shadow-glow);
    }

    .mobile-nav {
      display: none;
    }

    /* 底部胶囊导航(移动端) */
    .bottom-capsule-nav {
      display: none;
      position: fixed;
      bottom: 16px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--secondary-dark);
      backdrop-filter: blur(20px);
      border-radius: 40px;
      padding: 8px 24px;
      gap: 20px;
      z-index: 110;
      box-shadow: 0 10px 25px rgba(0,0,0,0.25);
    }

    .bottom-capsule-nav a {
      color: var(--text-light);
      font-size: 0.8rem;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 2px;
      font-weight: 500;
    }

    .bottom-capsule-nav a i {
      font-size: 1.2rem;
    }

    .bottom-capsule-nav a.active {
      color: var(--primary);
    }

    /* 板块间距 */
    section {
      padding: 100px 0;
    }

    .section-title {
      font-size: 2.4rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
      color: var(--secondary-dark);
      text-align: center;
    }

    .section-sub {
      color: var(--text-secondary);
      text-align: center;
      max-width: 680px;
      margin: 0 auto 56px;
      font-size: 1.125rem;
    }

    /* 按钮 */
    .btn-primary {
      background: var(--primary);
      color: var(--secondary-dark);
      font-weight: 600;
      padding: 14px 36px;
      border-radius: var(--radius-pill);
      font-size: 1rem;
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      box-shadow: var(--shadow-glow);
    }

    .btn-outline {
      border: 2px solid var(--primary);
      color: var(--primary);
      background: transparent;
      padding: 14px 36px;
      border-radius: var(--radius-pill);
      font-weight: 600;
    }

    .btn-outline:hover {
      background: var(--primary-soft);
    }

    .btn-text {
      color: var(--primary);
      font-weight: 600;
      padding: 0;
    }

    .btn-text:hover {
      text-decoration: underline;
      color: var(--primary-hover);
    }

    /* Hero */
    #hero {
      background: linear-gradient(135deg, #1A1A2E 0%, #16213E 100%);
      color: white;
      padding: 160px 0 120px;
      position: relative;
      overflow: hidden;
    }

    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
      flex-wrap: wrap;
    }

    .hero-content {
      flex: 1 1 400px;
    }

    .hero-content h1 {
      font-size: 3.4rem;
      font-weight: 700;
      line-height: 1.2;
      margin-bottom: 24px;
    }

    .hero-highlight {
      color: var(--primary);
    }

    .hero-desc {
      font-size: 1.2rem;
      color: rgba(255,255,255,0.8);
      margin-bottom: 36px;
      max-width: 500px;
    }

    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .hero-stats {
      display: flex;
      gap: 40px;
      flex-wrap: wrap;
    }

    .stat-item h3 {
      font-size: 2.4rem;
      font-weight: 700;
      color: var(--primary);
    }

    .stat-item p {
      color: rgba(255,255,255,0.7);
    }

    .hero-visual {
      flex: 1 1 400px;
      position: relative;
    }

    .hero-visual img {
      border-radius: 24px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.4);
      width: 100%;
      object-fit: cover;
    }

    .golden-glow {
      position: absolute;
      top: -20px;
      right: -20px;
      width: 180px;
      height: 180px;
      background: radial-gradient(circle, rgba(201,168,76,0.3) 0%, transparent 70%);
    }

    /* 功能卡片 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .feature-card {
      background: var(--white);
      border-radius: var(--radius-sm);
      padding: 32px 24px;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--primary-border);
      transition: all 0.25s;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
      border-color: var(--primary);
    }

    .feature-icon {
      font-size: 2.2rem;
      color: var(--primary);
      margin-bottom: 20px;
    }

    .feature-card h3 {
      margin-bottom: 12px;
    }

    /* 场景卡片 */
    .scenarios-row {
      display: flex;
      gap: 28px;
      flex-wrap: wrap;
    }

    .scenario-card {
      display: flex;
      background: var(--white);
      border-radius: var(--radius-md);
      overflow: hidden;
      flex: 1 1 360px;
      box-shadow: var(--shadow-card);
    }

    .scenario-img {
      width: 45%;
      object-fit: cover;
    }

    .scenario-text {
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .tag {
      background: var(--primary-soft);
      color: var(--primary);
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
      align-self: flex-start;
      margin-bottom: 12px;
    }

    /* 数据墙 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }

    .case-card {
      background: var(--white);
      padding: 32px 16px;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-card);
    }

    .case-number {
      font-size: 3rem;
      font-weight: 700;
      color: var(--primary);
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }

    .faq-item {
      border-bottom: 1px solid var(--border-light);
      padding: 20px 0;
      cursor: pointer;
    }

    .faq-question {
      display: flex;
      justify-content: space-between;
      font-weight: 600;
      font-size: 1.1rem;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-secondary);
    }

    .faq-item.open .faq-answer {
      max-height: 200px;
      margin-top: 16px;
    }

    /* CTA band */
    .cta-band {
      background: var(--secondary-dark);
      text-align: center;
      padding: 80px 0;
      color: white;
      border-radius: 24px;
      margin: 0 20px;
    }

    /* Footer */
    .site-footer {
      background: var(--secondary-dark);
      color: var(--text-light);
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: white;
      margin-bottom: 20px;
    }

    .footer-col a {
      display: block;
      margin-bottom: 10px;
      color: var(--text-light);
    }

    .footer-col a:hover {
      color: var(--primary);
    }

    .copyright {
      border-top: 1px solid rgba(255,255,255,0.1);
      padding-top: 24px;
      text-align: center;
    }

    @media (max-width: 1024px) {
      .features-grid { grid-template-columns: repeat(2,1fr); }
      .cases-grid { grid-template-columns: repeat(2,1fr); }
    }

    @media (max-width: 768px) {
      .container { padding: 0 20px; }
      .nav-desktop { display: none; }
      .mobile-nav { display: block; }
      .bottom-capsule-nav { display: flex; }
      section { padding: 70px 0; }
      .hero-grid { flex-direction: column; }
      .features-grid { grid-template-columns: 1fr; }
      .scenario-card { flex-direction: column; }
      .scenario-img { width: 100%; height: 200px; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .hero-content h1 { font-size: 2.4rem; }
    }