/* roulang page: index */
:root {
      --kiwi-green: #8BC34A;
      --kiwi-dark: #7CB342;
      --deep-rock: #1E2A38;
      --tech-blue: #4E6EF2;
      --bg-light: #F5F6FA;
      --card-white: #FFFFFF;
      --card-glass: rgba(255,255,255,0.85);
      --text-primary: #1F2329;
      --text-secondary: #86909C;
      --white: #FFFFFF;
      --success-green: #00B578;
      --alert-orange: #FF9F0A;
      --error-red: #FA5151;
      --radius-lg: 16px;
      --radius-pill: 50px;
      --shadow-card: 0 8px 32px rgba(31, 35, 41, 0.08);
      --shadow-green: 0 4px 15px rgba(139, 195, 74, 0.4);
      --shadow-green-hover: 0 6px 20px rgba(139, 195, 74, 0.6);
      --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-primary);
      line-height: 1.6;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 40px;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition-base);
    }

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

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

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

    /* 导航 */
    #nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      padding: 16px 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: transparent;
      transition: background var(--transition-base), backdrop-filter var(--transition-base), box-shadow var(--transition-base);
      color: var(--white);
    }

    #nav.scrolled {
      background: rgba(30, 42, 56, 0.95);
      backdrop-filter: blur(20px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.1);
      border-bottom: 1px solid rgba(255,255,255,0.15);
    }

    .logo {
      font-size: 24px;
      font-weight: 700;
      letter-spacing: 1px;
      color: var(--white);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .logo span {
      color: var(--kiwi-green);
    }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
      font-weight: 500;
      font-size: 16px;
    }

    .nav-links a {
      color: var(--white);
      position: relative;
      padding: 4px 0;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--kiwi-green);
      transition: width var(--transition-base);
    }

    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      cursor: pointer;
    }

    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--white);
      transition: var(--transition-base);
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: var(--deep-rock);
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 40px;
      z-index: 999;
    }

    .mobile-menu a {
      color: var(--white);
      font-size: 24px;
      font-weight: 500;
    }

    .mobile-menu.open {
      display: flex;
    }

    /* Hero */
    #hero {
      height: 100vh;
      min-height: 700px;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, #1E2A38 0%, #0f1a24 100%);
      position: relative;
      overflow: hidden;
      color: var(--white);
      margin-bottom: 0;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
      width: 100%;
    }

    .hero-left {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .hero-left h1 {
      font-size: 48px;
      line-height: 1.2;
      font-weight: 700;
      color: var(--white);
    }

    .hero-left .subtitle {
      font-size: 18px;
      color: #B0B8C1;
      max-width: 480px;
    }

    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-top: 8px;
    }

    .btn-primary {
      background: var(--kiwi-green);
      color: var(--white);
      border-radius: var(--radius-pill);
      padding: 14px 32px;
      font-weight: 600;
      box-shadow: var(--shadow-green);
      border: none;
    }

    .btn-primary:hover {
      background: var(--kiwi-dark);
      box-shadow: var(--shadow-green-hover);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--kiwi-green);
      color: var(--kiwi-green);
      border-radius: var(--radius-pill);
      padding: 14px 32px;
      font-weight: 600;
    }

    .btn-outline:hover {
      background: rgba(139, 195, 74, 0.1);
    }

    .hero-right {
      position: relative;
      display: flex;
      align-items: center;
      justify-content: center;
    }

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

    .floating-card {
      position: absolute;
      bottom: 20px;
      right: -20px;
      background: var(--card-glass);
      backdrop-filter: blur(20px) saturate(180%);
      border: 1px solid rgba(255,255,255,0.5);
      border-radius: var(--radius-lg);
      padding: 16px 24px;
      color: var(--text-primary);
      box-shadow: var(--shadow-card);
      animation: float 3s ease-in-out infinite;
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 600;
    }

    .floating-card .big-number {
      font-size: 28px;
      color: var(--kiwi-green);
      font-weight: 700;
    }

    @keyframes float {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-8px); }
    }

    /* 区块通用 */
    section {
      padding: 100px 0;
    }

    .section-title {
      font-size: 36px;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--text-primary);
    }

    .section-desc {
      color: var(--text-secondary);
      max-width: 600px;
      margin-bottom: 48px;
    }

    /* 亮点网格 */
    .highlights-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 24px;
    }

    .highlight-card {
      background: var(--card-glass);
      backdrop-filter: blur(20px) saturate(180%);
      border: 1px solid rgba(255,255,255,0.5);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .highlight-number {
      font-size: 56px;
      font-weight: 700;
      color: var(--kiwi-green);
      line-height: 1;
    }

    /* 优势 */
    .adv-grid {
      display: grid;
      grid-template-columns: 5fr 7fr;
      gap: 60px;
      align-items: center;
    }

    .adv-list {
      display: flex;
      flex-direction: column;
      gap: 32px;
    }

    .adv-item {
      display: flex;
      gap: 20px;
      align-items: flex-start;
    }

    .adv-icon {
      width: 48px;
      height: 48px;
      background: rgba(139, 195, 74, 0.12);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--kiwi-green);
      font-size: 24px;
    }

    .adv-img {
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-card);
    }

    /* 服务瀑布 */
    .services-masonry {
      column-count: 3;
      column-gap: 24px;
    }

    .service-card {
      background: var(--card-white);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      margin-bottom: 24px;
      break-inside: avoid;
      transition: transform var(--transition-base), box-shadow var(--transition-base);
      display: inline-block;
      width: 100%;
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 36px rgba(0,0,0,0.1);
    }

    .service-card img {
      width: 100%;
      height: auto;
      object-fit: cover;
    }

    .service-card-content {
      padding: 24px;
    }

    .tag {
      background: rgba(78, 110, 242, 0.1);
      color: var(--tech-blue);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 600;
    }

    /* 对比 */
    .compare-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .compare-col {
      background: var(--card-glass);
      backdrop-filter: blur(20px);
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid rgba(255,255,255,0.5);
    }

    .compare-col.featured {
      border: 2px solid var(--kiwi-green);
      box-shadow: 0 0 24px rgba(139, 195, 74, 0.3);
      background: rgba(139, 195, 74, 0.04);
      transform: scale(1.02);
    }

    .check {
      color: var(--success-green);
    }

    .cross {
      color: #C0C4CC;
    }

    /* 案例横向滚动 */
    .cases-scroll {
      display: flex;
      gap: 20px;
      overflow-x: auto;
      scroll-snap-type: x mandatory;
      padding-bottom: 16px;
      -webkit-overflow-scrolling: touch;
    }

    .case-card {
      min-width: 320px;
      scroll-snap-align: start;
      background: var(--card-white);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid #E5E6EB;
    }

    .faq-question {
      width: 100%;
      padding: 20px 0;
      display: flex;
      justify-content: space-between;
      font-weight: 500;
      font-size: 18px;
      background: transparent;
      border: none;
      cursor: pointer;
      color: var(--text-primary);
    }

    .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;
      padding-bottom: 16px;
    }

    /* CTA */
    .cta-dark {
      background: var(--deep-rock);
      color: white;
      text-align: center;
    }

    /* 页脚 */
    #footer {
      background: var(--deep-rock);
      color: #B0B8C1;
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
    }

    .copyright {
      text-align: center;
      margin-top: 40px;
      font-size: 13px;
      color: #6A737D;
    }

    @media (max-width: 1024px) {
      .container { padding: 0 24px; }
      .hero-grid { grid-template-columns: 1fr; gap: 40px; }
      .highlights-grid { grid-template-columns: 1fr 1fr; }
      .adv-grid { grid-template-columns: 1fr; }
      .services-masonry { column-count: 2; }
      .compare-grid { overflow-x: auto; display: flex; }
      .compare-col { min-width: 260px; }
    }

    @media (max-width: 768px) {
      h1 { font-size: 32px !important; }
      h2 { font-size: 26px !important; }
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .highlights-grid { grid-template-columns: 1fr; }
      .services-masonry { column-count: 1; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .floating-card { right: 10px; bottom: 10px; }
    }