/* roulang page: index */
:root {
      --pwise-deep-blue: #1A3C6D;
      --pwise-champagne: #C9A844;
      --pwise-bg: #F8F9FB;
      --pwise-white: #FFFFFF;
      --pwise-text: #2C2C2C;
      --pwise-subtle: #6B7280;
      --pwise-border: #E5E7EB;
      --pwise-radius-card: 12px;
      --pwise-radius-btn: 8px;
      --pwise-shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
      --pwise-shadow-hover: 0 2px 8px rgba(0,0,0,0.06), 0 8px 24px rgba(0,0,0,0.06);
      --pwise-gap-section: 100px;
    }

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

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      background-color: var(--pwise-bg);
      color: var(--pwise-text);
      line-height: 1.6;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

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

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

    button, input, textarea {
      font-family: inherit;
    }

    /* 导航 */
    #header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 100;
      transition: background 0.25s ease, box-shadow 0.25s ease;
      padding: 18px 0;
      background: transparent;
    }

    #header.scrolled {
      background: #ffffff;
      box-shadow: 0 1px 4px rgba(0,0,0,0.03);
      padding: 14px 0;
    }

    #header .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .logo-area {
      display: flex;
      align-items: baseline;
      gap: 8px;
      font-weight: 700;
      font-size: 24px;
      letter-spacing: -0.3px;
      color: #fff;
      transition: color 0.25s;
    }

    #header.scrolled .logo-area {
      color: var(--pwise-deep-blue);
    }

    .logo-domain {
      font-size: 14px;
      font-weight: 400;
      color: rgba(255,255,255,0.7);
      letter-spacing: 0.2px;
    }

    #header.scrolled .logo-domain {
      color: var(--pwise-subtle);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 36px;
    }

    .nav-links a {
      font-weight: 500;
      font-size: 16px;
      color: rgba(255,255,255,0.9);
      transition: color 0.2s;
      position: relative;
    }

    #header.scrolled .nav-links a {
      color: #2C2C2C;
    }

    .nav-links a:hover {
      color: #C9A844;
    }

    .btn-nav-cta {
      background: white;
      color: #1A3C6D;
      border-radius: 24px;
      padding: 10px 24px;
      font-weight: 600;
      font-size: 15px;
      transition: all 0.25s;
      border: none;
      cursor: pointer;
    }

    #header.scrolled .btn-nav-cta {
      background: var(--pwise-deep-blue);
      color: white;
    }

    .btn-nav-cta:hover {
      background: #C9A844;
      color: white;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      color: white;
      font-size: 28px;
    }

    #header.scrolled .menu-toggle {
      color: var(--pwise-deep-blue);
    }

    /* 移动菜单 */
    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(26,60,109,0.97);
      z-index: 105;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 40px;
    }

    .mobile-menu a {
      font-size: 28px;
      font-weight: 600;
      color: white;
    }

    .close-menu {
      position: absolute;
      top: 24px;
      right: 24px;
      background: none;
      border: none;
      font-size: 32px;
      color: white;
      cursor: pointer;
    }

    section {
      padding-top: var(--pwise-gap-section);
      padding-bottom: var(--pwise-gap-section);
    }

    h1, h2, h3 {
      font-weight: 600;
    }

    h1 {
      font-size: 36px;
      font-weight: 700;
      line-height: 1.3;
      color: var(--pwise-deep-blue);
      letter-spacing: -0.2px;
    }

    h2 {
      font-size: 28px;
      line-height: 1.4;
      color: var(--pwise-deep-blue);
      margin-bottom: 12px;
      letter-spacing: -0.2px;
    }

    /* hero */
    #hero {
      padding-top: 140px;
      background: #ffffff;
      background-image: radial-gradient(circle at 10% 20%, rgba(201,169,68,0.03) 0%, transparent 40%);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .hero-left h1 {
      margin-bottom: 20px;
    }

    .hero-sub {
      font-size: 18px;
      color: var(--pwise-subtle);
      margin-bottom: 24px;
    }

    .btn-primary {
      background: var(--pwise-deep-blue);
      color: white;
      padding: 14px 32px;
      border-radius: var(--pwise-radius-btn);
      font-weight: 600;
      font-size: 16px;
      border: none;
      transition: background 0.25s, box-shadow 0.25s;
      display: inline-block;
      cursor: pointer;
    }

    .btn-primary:hover {
      background: #152E54;
      box-shadow: 0 6px 18px rgba(26,60,109,0.2);
    }

    .hero-image {
      border-radius: 24px;
      overflow: hidden;
      box-shadow: 0 20px 35px rgba(0,0,0,0.04);
    }

    /* 卡片通用 */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      margin-top: 28px;
    }

    .card {
      background: var(--pwise-white);
      border-radius: var(--pwise-radius-card);
      padding: 32px;
      box-shadow: var(--pwise-shadow-sm);
      transition: all 0.25s ease;
    }

    .card:hover {
      box-shadow: var(--pwise-shadow-hover);
      transform: translateY(-2px);
    }

    .icon-placeholder {
      width: 64px;
      height: 64px;
      background: #f0f4fa;
      border-radius: 16px;
      margin-bottom: 20px;
      background-size: cover;
    }

    .divider {
      height: 1px;
      background: var(--pwise-border);
    }

    .tag {
      color: var(--pwise-champagne);
      font-weight: 600;
      font-size: 14px;
    }

    .footer-cta-bg {
      background-color: rgba(26,60,109,0.08);
      border-radius: 32px;
    }

    @media (max-width: 768px) {
      :root {
        --pwise-gap-section: 60px;
      }
      h1 {
        font-size: 28px;
      }
      h2 {
        font-size: 22px;
      }
      .nav-links {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .card-grid {
        grid-template-columns: 1fr;
      }
      .stat-row {
        flex-wrap: wrap;
        gap: 30px;
      }
    }

    @media (max-width: 480px) {
      .btn-primary {
        width: 100%;
        text-align: center;
      }
    }