/* roulang page: index */
:root {
      --primary: #1A1F36;
      --accent: #C5A86C;
      --accent-hover: #B3934F;
      --bg: #FAF9F7;
      --card-bg: #FFFFFF;
      --text-primary: #1A1F36;
      --text-body: #3A3F4B;
      --text-muted: #6B7280;
      --border-light: #E5E7EB;
      --shadow-card: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-hover: 0 12px 32px rgba(197,168,108,0.12);
      --radius-lg: 18px;
      --radius-md: 10px;
      --radius-sm: 8px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
      --transition: 0.3s ease;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    a { text-decoration: none; color: inherit; }
    img { max-width: 100%; height: auto; display: block; }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 SaaS 命令栏 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
      z-index: 50;
      display: flex;
      align-items: center;
      padding: 0 24px;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
    }
    .logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: 0.5px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo i { color: var(--accent); font-size: 1.8rem; }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    .nav-links a {
      color: var(--text-body);
      font-weight: 500;
      font-size: 0.95rem;
      transition: color var(--transition);
    }
    .nav-links a:hover { color: var(--accent); }
    .nav-right {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .search-box {
      background: rgba(245,244,240,0.8);
      border-radius: 30px;
      padding: 8px 16px;
      display: flex;
      align-items: center;
      gap: 8px;
      border: 1px solid transparent;
      transition: var(--transition);
    }
    .search-box i { color: var(--text-muted); font-size: 0.9rem; }
    .search-box input {
      border: none;
      background: transparent;
      outline: none;
      font-size: 0.9rem;
      width: 120px;
      color: var(--text-primary);
    }
    .search-box input::placeholder { color: var(--text-muted); }
    .btn-primary {
      background: var(--accent);
      color: white;
      font-weight: 600;
      padding: 10px 24px;
      border-radius: 30px;
      border: none;
      cursor: pointer;
      transition: background var(--transition), box-shadow var(--transition);
      font-size: 0.9rem;
      white-space: nowrap;
    }
    .btn-primary:hover { background: var(--accent-hover); box-shadow: 0 6px 16px rgba(197,168,108,0.3); }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--accent);
      color: var(--accent);
      font-weight: 600;
      padding: 10px 24px;
      border-radius: 30px;
      cursor: pointer;
      transition: all var(--transition);
    }
    .btn-outline:hover { background: rgba(197,168,108,0.08); }
    .hamburger { display: none; font-size: 1.8rem; color: var(--primary); cursor: pointer; }
    
    /* 版块通用 */
    section { padding: 80px 0; }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-sub {
      color: var(--text-muted);
      font-size: 1rem;
      margin-bottom: 40px;
      max-width: 600px;
    }
    
    /* Hero */
    .hero {
      padding: 140px 0 80px;
      display: flex;
      align-items: center;
      gap: 60px;
    }
    .hero-content h1 {
      font-size: 3rem;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.3;
      margin-bottom: 20px;
      letter-spacing: 0.5px;
    }
    .hero-content .sub {
      font-size: 1.1rem;
      color: var(--text-muted);
      margin-bottom: 30px;
    }
    .badge-group {
      display: flex;
      gap: 28px;
      margin-bottom: 32px;
    }
    .badge-item .num {
      font-size: 2rem;
      font-weight: 700;
      color: var(--accent);
    }
    .badge-item span {
      display: block;
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .hero-image img {
      border-radius: 24px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.08);
    }
    
    /* 核心优势 4项 */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 30px;
    }
    .adv-card {
      background: var(--card-bg);
      padding: 32px 24px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      transition: all var(--transition);
      position: relative;
      overflow: hidden;
    }
    .adv-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
    .adv-card i { font-size: 2.2rem; color: var(--accent); margin-bottom: 20px; }
    .adv-card h3 { font-size: 1.25rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
    .adv-card p { color: var(--text-body); font-size: 0.95rem; }
    .adv-card::after {
      content: '';
      position: absolute;
      bottom: 0; left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, var(--accent), #d4b87a);
      transform: scaleX(0);
      transition: transform var(--transition);
    }
    .adv-card:hover::after { transform: scaleX(1); }
    
    /* 功能分组左右交替 */
    .feature-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 80px;
    }
    .feature-row.reverse { flex-direction: row-reverse; }
    .feature-text { flex: 1; }
    .feature-text h2 { font-size: 1.8rem; font-weight: 700; color: var(--primary); margin-bottom: 16px; }
    .feature-list { list-style: none; margin: 20px 0; }
    .feature-list li {
      display: flex;
      align-items: baseline;
      gap: 10px;
      margin-bottom: 12px;
      color: var(--text-body);
    }
    .feature-list i { color: var(--accent); font-size: 0.9rem; margin-top: 5px; }
    .feature-image img {
      border-radius: 20px;
      box-shadow: 0 16px 32px rgba(0,0,0,0.05);
    }
    
    /* 使用场景卡片 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 30px;
    }
    .scenario-card {
      background: #F5F4F0;
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: var(--transition);
    }
    .scenario-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
    .scenario-img { height: 180px; background-size: cover; background-position: center; }
    .scenario-info { padding: 24px; }
    .scenario-info h3 { font-weight: 700; color: var(--primary); }
    
    /* 成功案例 2x2 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2,1fr);
      gap: 30px;
    }
    .case-card {
      background: var(--card-bg);
      padding: 32px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
      display: flex;
      gap: 24px;
      align-items: center;
    }
    .case-logo {
      width: 80px; height: 80px;
      background: #f0ede6;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      font-weight: 700;
    }
    .case-content .stat {
      font-size: 2rem;
      font-weight: 700;
      color: var(--accent);
    }
    .case-quote {
      font-style: italic;
      color: var(--text-body);
      margin: 8px 0;
    }
    
    /* FAQ */
    .accordion-item {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
      overflow: hidden;
    }
    .accordion-title {
      padding: 18px 24px;
      font-weight: 600;
      color: var(--primary);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-left: 4px solid var(--accent);
      transition: background var(--transition);
    }
    .accordion-content {
      padding: 0 24px 18px;
      color: var(--text-body);
      display: none;
    }
    .accordion-item.active .accordion-content { display: block; }
    
    /* 最终CTA */
    .cta-banner {
      background: var(--primary);
      border-radius: 24px;
      padding: 60px 40px;
      text-align: center;
      color: white;
    }
    .cta-banner h2 { color: white; font-size: 2rem; }
    .cta-banner .sub { color: #cbd5e0; margin: 16px 0 30px; }
    
    /* 页脚 */
    .site-footer {
      background: var(--primary);
      color: #cbd5e0;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
    }
    .footer-links a { display: block; margin-bottom: 8px; color: #cbd5e0; }
    .subscribe-input {
      display: flex;
      gap: 8px;
      margin-top: 12px;
    }
    .subscribe-input input {
      flex:1;
      padding: 10px 14px;
      border-radius: 30px;
      border: none;
      background: rgba(255,255,255,0.1);
      color: white;
    }
    
    @media (max-width: 1024px) {
      .advantages-grid { grid-template-columns: repeat(2,1fr); }
      .cases-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .nav-links, .nav-right .search-box { display: none; }
      .hamburger { display: block; }
      .hero { flex-direction: column; padding: 120px 0 60px; }
      .hero-content h1 { font-size: 2rem; }
      .advantages-grid { grid-template-columns: 1fr; }
      .feature-row, .feature-row.reverse { flex-direction: column; }
      .scenario-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }