/* roulang page: index */
:root {
      --primary: #F15A24;
      --primary-dark: #D94A1A;
      --secondary: #1E1E24;
      --bg: #F7F4EF;
      --white: #FFFFFF;
      --accent: #00A896;
      --accent-light: #e0f7f3;
      --text: #3A3A40;
      --text-light: #6B6B72;
      --border: #E5E0D9;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 12px 28px rgba(0,0,0,0.08), 0 0 0 1px rgba(241,90,36,0.1);
      --radius-card: 20px;
      --radius-btn: 12px;
      --max-width: 1200px;
      --nav-height: 72px;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.75;
      font-weight: 400;
      font-size: 1rem;
      -webkit-font-smoothing: antialiased;
    }
    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;
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 导航 */
    #header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: var(--white);
      height: var(--nav-height);
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      transition: box-shadow 0.2s;
    }
    #header.scrolled {
      box-shadow: 0 6px 18px rgba(0,0,0,0.05);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .logo {
      font-weight: 700;
      font-size: 1.5rem;
      color: var(--secondary);
      letter-spacing: 1px;
    }
    .logo span {
      color: var(--primary);
    }
    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }
    .nav-links a {
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text);
      position: relative;
      padding: 6px 0;
      transition: color 0.2s;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
    }
    .nav-cta {
      background: var(--primary);
      color: white !important;
      padding: 8px 20px !important;
      border-radius: 30px;
      font-weight: 600;
    }
    .nav-cta:hover {
      background: var(--primary-dark);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
    }
    .hamburger span {
      width: 26px;
      height: 2.5px;
      background: var(--secondary);
      border-radius: 3px;
      transition: all 0.3s;
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: var(--nav-height);
      left: 0;
      width: 100%;
      background: var(--white);
      flex-direction: column;
      padding: 24px;
      gap: 18px;
      border-bottom: 1px solid var(--border);
      z-index: 40;
    }
    .mobile-menu a {
      font-size: 1.1rem;
      font-weight: 500;
    }
    /* Hero */
    #hero {
      padding: 60px 0 80px;
      background: linear-gradient(15deg, #F15A24 0%, #D94A1A 100%);
      color: white;
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 40px;
    }
    .hero-left {
      flex: 1 1 50%;
    }
    .hero-right {
      flex: 1 1 50%;
      display: flex;
      justify-content: center;
    }
    .hero-right img {
      max-height: 380px;
      border-radius: 24px;
      box-shadow: 0 20px 35px rgba(0,0,0,0.2);
    }
    .hero-badge {
      display: inline-block;
      background: rgba(255,255,255,0.2);
      backdrop-filter: blur(4px);
      padding: 4px 16px;
      border-radius: 30px;
      font-size: 0.9rem;
      margin-bottom: 20px;
    }
    h1 {
      font-weight: 700;
      font-size: clamp(2.2rem, 5vw, 3.6rem);
      letter-spacing: -0.5px;
      line-height: 1.2;
      margin-bottom: 16px;
    }
    .hero-sub {
      font-size: 1.2rem;
      opacity: 0.9;
      margin-bottom: 28px;
      max-width: 500px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .btn-primary {
      background: var(--white);
      color: var(--primary);
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-size: 1rem;
      box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    }
    .btn-primary:hover {
      background: #f0f0f0;
      transform: translateY(-2px);
    }
    .btn-outline-light {
      border: 2px solid white;
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
    }
    .btn-outline-light:hover {
      background: white;
      color: var(--primary);
    }
    .hero-stats {
      display: flex;
      gap: 30px;
      flex-wrap: wrap;
    }
    .hero-stats div {
      font-weight: 600;
    }
    .hero-stats strong {
      font-family: 'Bebas Neue', 'DIN Alternate', sans-serif;
      font-size: 2rem;
      display: block;
      letter-spacing: 1px;
    }
    /* 通用板块 */
    section {
      padding: 80px 0;
    }
    h2 {
      font-weight: 600;
      font-size: clamp(1.6rem, 3.5vw, 2.2rem);
      margin-bottom: 16px;
      color: var(--secondary);
    }
    .section-intro {
      max-width: 700px;
      margin-bottom: 48px;
      color: var(--text-light);
      font-size: 1.1rem;
    }
    /* highlights */
    .highlights-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .highlight-card {
      background: var(--white);
      padding: 28px 20px;
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: all 0.2s;
    }
    .highlight-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .highlight-num {
      font-family: 'Bebas Neue', sans-serif;
      font-size: 2.8rem;
      color: var(--accent);
      line-height: 1;
    }
    .highlight-desc {
      margin-top: 10px;
      font-weight: 500;
      color: var(--text);
    }
    /* services 杂志网格 */
    .services-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .service-card {
      background: var(--white);
      border-radius: var(--radius-card);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      transition: 0.2s;
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      box-shadow: var(--shadow-md);
    }
    .service-card.wide {
      grid-column: span 2;
      display: flex;
      flex-direction: row;
      align-items: center;
      gap: 30px;
    }
    .service-icon {
      font-size: 2.5rem;
      color: var(--primary);
      margin-bottom: 16px;
    }
    .service-card h3 {
      font-size: 1.4rem;
      margin-bottom: 10px;
    }
    .text-link {
      color: var(--accent);
      font-weight: 600;
      text-decoration: underline;
      margin-top: 12px;
      display: inline-block;
    }
    /* cases 瀑布流 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .case-card {
      background: var(--white);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s;
    }
    .case-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }
    .case-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .case-tag {
      position: absolute;
      top: 15px;
      left: 15px;
      background: var(--accent);
      color: white;
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
    }
    .case-content {
      padding: 20px;
    }
    /* 对比表 */
    .compare-table {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0;
      background: var(--white);
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .compare-col {
      padding: 32px 24px;
      text-align: center;
    }
    .compare-col.highlight {
      background: #f0faf8;
    }
    .compare-col h3 {
      font-size: 1.5rem;
      margin-bottom: 12px;
    }
    .badge {
      background: var(--accent);
      color: white;
      padding: 4px 14px;
      border-radius: 20px;
      font-size: 0.75rem;
      font-weight: 700;
      display: inline-block;
    }
    .compare-item {
      margin: 18px 0;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
    }
    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--white);
      border-radius: 16px;
      margin-bottom: 12px;
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 24px;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      border-left: 5px solid var(--primary);
    }
    .faq-answer {
      padding: 0 24px 20px;
      color: var(--text-light);
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
    }
    /* CTA */
    #cta {
      background: var(--secondary);
      color: white;
      text-align: center;
      padding: 80px 20px;
    }
    #cta h2 {
      color: white;
      margin-bottom: 20px;
    }
    .btn-large {
      background: var(--primary);
      color: white;
      padding: 18px 40px;
      font-size: 1.2rem;
      border-radius: 40px;
      font-weight: 700;
    }
    .trust-note {
      margin-top: 18px;
      opacity: 0.8;
    }
    /* footer */
    #footer {
      background: #18181c;
      color: #ccc;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }
    .footer-logo {
      font-size: 1.6rem;
      font-weight: 700;
      color: white;
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero-grid { flex-direction: column; }
      .highlights-grid { grid-template-columns: repeat(2,1fr); }
      .services-grid { grid-template-columns: 1fr; }
      .service-card.wide { grid-column: span 1; flex-direction: column; }
      .cases-grid { grid-template-columns: 1fr; }
      .compare-table { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 480px) {
      .highlights-grid, .footer-grid { grid-template-columns: 1fr; }
      .hero-stats { gap: 18px; }
    }