/* roulang page: index */
:root {
      --primary: #E63946;
      --primary-dark: #C1121F;
      --secondary: #1D3557;
      --accent-bg: #F1FAEE;
      --highlight: #A8DADC;
      --success: #2A9D8F;
      --white: #FFFFFF;
      --gray-100: #F7FAFC;
      --gray-200: #EDF2F7;
      --gray-300: #E2E8F0;
      --gray-500: #A0AEC0;
      --gray-700: #4A5568;
      --gray-900: #1A202C;
      --radius-md: 12px;
      --radius-lg: 20px;
      --radius-pill: 50px;
      --shadow-sm: 0 4px 10px -5px rgba(0,0,0,0.04);
      --shadow-card: 0 10px 30px -10px rgba(0,0,0,0.08);
      --shadow-hover: 0 18px 35px -12px rgba(0,0,0,0.15);
      --transition: 0.3s ease;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      font-weight: 400;
      line-height: 1.7;
      color: var(--gray-700);
      background-color: var(--white);
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, h4 {
      font-family: inherit;
      color: var(--secondary);
      letter-spacing: -0.02em;
    }
    
    a {
      color: var(--primary);
      transition: var(--transition);
    }
    
    a:hover {
      color: var(--primary-dark);
      text-decoration: none;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    
    /* ----- 导航栏双层 Sticky ----- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      box-shadow: 0 6px 18px rgba(0,0,0,0.04);
    }
    
    .nav-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.8rem 1.5rem;
      background: var(--white);
      border-bottom: 1px solid var(--gray-200);
    }
    
    .brand {
      display: flex;
      align-items: baseline;
      gap: 0.6rem;
    }
    .logo-text {
      font-weight: 800;
      font-size: 1.6rem;
      color: var(--secondary);
      letter-spacing: -0.01em;
      background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .domain-tag {
      font-size: 0.75rem;
      color: var(--gray-500);
      font-weight: 500;
      margin-left: 0.25rem;
    }
    
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 1.2rem;
    }
    .search-icon {
      font-size: 1.2rem;
      color: var(--gray-700);
      cursor: pointer;
      transition: var(--transition);
    }
    .search-icon:hover {
      color: var(--primary);
    }
    .cta-btn {
      background: var(--primary);
      color: white;
      border: none;
      padding: 0.5rem 1.5rem;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 0.9rem;
      transition: var(--transition);
      white-space: nowrap;
      cursor: pointer;
    }
    .cta-btn:hover {
      background: var(--primary-dark);
      box-shadow: 0 5px 15px rgba(230,57,70,0.35);
      color: white;
    }
    
    .nav-bottom {
      background: var(--accent-bg);
      padding: 0.4rem 1.5rem;
      overflow-x: auto;
      white-space: nowrap;
      display: flex;
      gap: 0.5rem;
      border-top: 1px solid rgba(0,0,0,0.02);
    }
    .nav-pill {
      font-weight: 500;
      font-size: 0.9rem;
      padding: 0.5rem 1.2rem;
      border-radius: 30px;
      color: var(--gray-700);
      background: transparent;
      transition: var(--transition);
      display: inline-block;
    }
    .nav-pill:hover {
      background: rgba(230,57,70,0.08);
      color: var(--primary);
    }
    .nav-pill.active {
      background: var(--primary);
      color: white;
      font-weight: 600;
    }
    
    @media (max-width: 640px) {
      .nav-top {
        padding: 0.6rem 1rem;
      }
      .logo-text {
        font-size: 1.3rem;
      }
      .nav-bottom {
        gap: 0.2rem;
        padding: 0.3rem 1rem;
      }
    }
    
    /* ----- Hero 杂志分栏 ----- */
    .hero {
      padding: 3rem 0 4rem;
      background: var(--white);
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 3rem;
    }
    .hero-left {
      flex: 1 1 50%;
    }
    .hero-right {
      flex: 1 1 50%;
      position: relative;
    }
    .hero-img {
      clip-path: polygon(8% 0, 100% 0, 92% 100%, 0% 100%);
      border-radius: 30px;
      box-shadow: var(--shadow-card);
      transition: transform 0.4s ease;
      width: 100%;
    }
    .hero-img:hover {
      transform: scale(1.02);
    }
    .hero-title {
      font-weight: 800;
      font-size: 3.1rem;
      line-height: 1.2;
      color: var(--secondary);
      margin-bottom: 1.2rem;
    }
    .hero-title span {
      color: var(--primary);
      background: linear-gradient(to right, #E63946, #C1121F);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-sub {
      font-size: 1.15rem;
      color: var(--gray-700);
      margin-bottom: 2rem;
      max-width: 90%;
    }
    .trust-badges {
      display: flex;
      gap: 2.5rem;
      margin-top: 2.2rem;
    }
    .badge-item {
      font-weight: 700;
      font-size: 1.4rem;
      color: var(--secondary);
    }
    .badge-item small {
      display: block;
      font-weight: 400;
      font-size: 0.8rem;
      color: var(--gray-500);
    }
    
    @media (max-width: 1024px) {
      .hero-grid {
        flex-direction: column;
      }
      .hero-left, .hero-right {
        flex: 1 1 auto;
      }
      .hero-img {
        clip-path: none;
        border-radius: 24px;
      }
      .hero-title {
        font-size: 2.4rem;
      }
    }
    
    /* 亮点网格 非对称 */
    .highlights {
      background: var(--accent-bg);
      padding: 4rem 0;
    }
    .highlight-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.9fr 1.1fr;
      gap: 1.8rem;
    }
    .highlight-item {
      background: white;
      border-radius: var(--radius-md);
      padding: 2rem 1.5rem;
      border-left: 6px solid var(--highlight);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .highlight-item:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .highlight-item i {
      color: var(--primary);
      font-size: 2rem;
      margin-bottom: 0.8rem;
    }
    @media (max-width: 768px) {
      .highlight-grid {
        grid-template-columns: 1fr;
      }
    }
    
    /* 服务卡片 瀑布流 */
    .services {
      padding: 5rem 0;
    }
    .section-title {
      font-weight: 700;
      font-size: 2.2rem;
      margin-bottom: 2.5rem;
      position: relative;
    }
    .section-title::after {
      content: '';
      display: block;
      width: 65px;
      height: 5px;
      background: var(--primary);
      margin-top: 0.7rem;
      border-radius: 4px;
    }
    .masonry-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.8rem;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 2rem 1.5rem;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      border: 1px solid var(--gray-200);
    }
    .service-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-hover);
      border-color: var(--highlight);
    }
    .card-icon {
      font-size: 2.4rem;
      color: var(--primary);
    }
    @media (max-width: 768px) {
      .masonry-grid {
        grid-template-columns: 1fr;
      }
    }
    
    /* 方案对比 */
    .comparison {
      background: var(--gray-100);
      padding: 5rem 0;
    }
    .compare-table {
      background: white;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .table-row {
      display: flex;
      border-bottom: 1px solid var(--gray-200);
    }
    .table-cell {
      flex: 1;
      padding: 1.2rem;
      font-weight: 500;
    }
    .highlight-col {
      background: #FFF5F5;
    }
    .table-header {
      background: var(--secondary);
      color: white;
      font-weight: 700;
    }
    @media (max-width: 640px) {
      .table-row {
        flex-wrap: wrap;
      }
      .table-cell {
        flex: 1 1 50%;
      }
    }
    
    /* 案例图文交错 */
    .cases {
      padding: 5rem 0;
    }
    .case-row {
      display: flex;
      align-items: center;
      gap: 2.5rem;
      margin-bottom: 3.5rem;
    }
    .case-img {
      flex: 1;
      border-radius: 20px;
      box-shadow: var(--shadow-card);
    }
    .case-text {
      flex: 1;
    }
    .growth {
      font-weight: 800;
      color: var(--success);
      font-size: 2rem;
    }
    @media (max-width: 768px) {
      .case-row {
        flex-direction: column;
      }
    }
    
    /* FAQ */
    .faq {
      background: var(--accent-bg);
      padding: 5rem 0;
    }
    .accordion-item {
      background: white;
      border-radius: var(--radius-md);
      margin-bottom: 0.8rem;
      border: 1px solid var(--gray-200);
    }
    .accordion-title {
      padding: 1.2rem;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
    }
    
    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, #E63946 0%, #C1121F 100%);
      padding: 4rem 1.5rem;
      text-align: center;
      color: white;
    }
    .cta-form input {
      background: rgba(255,255,255,0.9);
      border: 1px solid rgba(255,255,255,0.5);
      border-radius: 30px;
      padding: 0.75rem 1.5rem;
    }
    
    /* Footer */
    .footer {
      background: var(--secondary);
      color: var(--gray-500);
      padding: 3rem 0 2rem;
    }
    .footer a {
      color: var(--gray-500);
    }
    .footer a:hover {
      color: white;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 2rem;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }