/* roulang page: index */
:root {
      --primary: #0A0E27;
      --primary-light: #111633;
      --primary-deep: #060918;
      --accent-gold: #D4AF37;
      --accent-gold-hover: #E8C547;
      --accent-cyan: #00F0FF;
      --text-white: #FFFFFF;
      --text-body: #B0B8D1;
      --text-muted: #6B7394;
      --border-gold-dim: rgba(212, 175, 55, 0.2);
      --border-cyan-dim: rgba(0, 240, 255, 0.3);
      --card-bg: rgba(17, 22, 51, 0.7);
      --card-border: rgba(212, 175, 55, 0.15);
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --shadow-hover: 0 16px 48px rgba(0, 240, 255, 0.15);
      --radius-md: 12px;
      --radius-sm: 8px;
      --max-width: 1280px;
      --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(--primary);
      color: var(--text-body);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    h1, h2, h3, .h4-style {
      color: var(--text-white);
      font-weight: 700;
    }

    h1 {
      font-size: 56px;
      line-height: 1.2;
      font-weight: 900;
    }

    h2 {
      font-size: 40px;
      line-height: 1.3;
      margin-bottom: 16px;
    }

    h3 {
      font-size: 22px;
      line-height: 1.4;
      font-weight: 600;
      margin-bottom: 8px;
    }

    .h4-style {
      font-size: 18px;
      line-height: 1.5;
      font-weight: 600;
    }

    p {
      margin-bottom: 16px;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.3s ease;
    }

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

    button, .btn {
      cursor: pointer;
      font-family: inherit;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-sm);
      padding: 14px 32px;
      font-size: 16px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all 0.3s cubic-bezier(0.2, 0.9, 0.4, 1);
    }

    .btn-primary {
      background: var(--accent-gold);
      color: var(--primary);
      box-shadow: 0 0 20px rgba(212, 175, 55, 0.4);
      animation: pulse-gold 2s infinite;
    }

    .btn-primary:hover {
      background: var(--accent-gold-hover);
      box-shadow: 0 0 28px rgba(212, 175, 55, 0.6);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--accent-gold);
      color: var(--accent-gold);
    }

    .btn-outline:hover {
      background: rgba(212, 175, 55, 0.1);
      transform: translateY(-2px);
    }

    .btn-cyan-link {
      background: transparent;
      color: var(--accent-cyan);
      padding: 0;
      border-radius: 0;
      font-weight: 600;
    }

    .btn-cyan-link:hover {
      text-decoration: underline;
      color: var(--accent-cyan);
    }

    @keyframes pulse-gold {
      0% { box-shadow: 0 0 20px rgba(212, 175, 55, 0.4); }
      50% { box-shadow: 0 0 32px rgba(212, 175, 55, 0.7); }
      100% { box-shadow: 0 0 20px rgba(212, 175, 55, 0.4); }
    }

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--nav-height);
      background: rgba(10, 14, 39, 0.75);
      backdrop-filter: blur(20px) saturate(180%);
      -webkit-backdrop-filter: blur(20px) saturate(180%);
      border-bottom: 1px solid var(--border-gold-dim);
      z-index: 100;
      transition: background 0.3s, box-shadow 0.3s;
    }

    .navbar.scrolled {
      background: rgba(10, 14, 39, 0.95);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.6);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }

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

    .logo i {
      font-size: 28px;
    }

    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }

    .nav-links a {
      color: var(--text-body);
      font-weight: 500;
      padding: 4px 0;
      border-bottom: 2px solid transparent;
      transition: color 0.2s, border-color 0.2s;
    }

    .nav-links a:hover, .nav-links a.active {
      color: var(--text-white);
      border-bottom-color: var(--accent-gold);
    }

    .nav-cta {
      margin-left: 16px;
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      background: none;
      border: none;
      cursor: pointer;
    }

    .hamburger span {
      width: 28px;
      height: 2px;
      background: white;
      transition: 0.3s;
    }

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

    .section-header {
      margin-bottom: 60px;
    }

    .section-header h2 {
      margin-bottom: 12px;
    }

    .divider {
      width: 60px;
      height: 4px;
      background: var(--accent-gold);
      margin: 16px 0 24px;
    }

    .text-cyan {
      color: var(--accent-cyan);
    }

    .text-gold {
      color: var(--accent-gold);
    }

    /* Hero */
    .hero {
      height: 100vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 30% 50%, rgba(0, 240, 255, 0.08) 0%, transparent 60%);
      position: relative;
      overflow: hidden;
    }

    .hero .container {
      display: flex;
      align-items: center;
      gap: 60px;
      width: 100%;
    }

    .hero-left {
      flex: 0 0 55%;
    }

    .hero-left h1 {
      margin-bottom: 24px;
    }

    .hero-left .subtitle {
      font-size: 18px;
      color: var(--text-body);
      margin-bottom: 40px;
      max-width: 540px;
    }

    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }

    .hero-right {
      flex: 0 0 45%;
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 20px 60px rgba(0, 240, 255, 0.2);
    }

    .hero-right img {
      width: 100%;
      height: auto;
      object-fit: cover;
      border-radius: var(--radius-md);
    }

    .hero-right::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(0, 240, 255, 0.25) 0%, transparent 60%);
      pointer-events: none;
    }

    /* 核心价值 */
    .values-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 40px;
      background: var(--primary-light);
      border-radius: var(--radius-md);
      padding: 60px;
    }

    .value-item {
      text-align: left;
    }

    .value-icon {
      font-size: 40px;
      color: var(--accent-cyan);
      margin-bottom: 20px;
    }

    .value-item h3 {
      margin-bottom: 12px;
    }

    /* 解决方案网格 */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .solution-card {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.3s ease;
      box-shadow: var(--shadow-card);
    }

    .solution-card:hover {
      border-color: var(--border-cyan-dim);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    .card-cover {
      height: 200px;
      overflow: hidden;
    }

    .card-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s;
    }

    .solution-card:hover .card-cover img {
      transform: scale(1.05);
    }

    .card-content {
      padding: 28px;
    }

    .card-content h3 {
      margin-bottom: 8px;
    }

    .card-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--accent-cyan);
      font-weight: 600;
      margin-top: 16px;
    }

    /* 案例瀑布流 */
    .cases-masonry {
      columns: 3;
      column-gap: 24px;
    }

    .case-item {
      break-inside: avoid;
      margin-bottom: 24px;
      background: var(--card-bg);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.3s;
      border: 1px solid transparent;
    }

    .case-item:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: var(--border-cyan-dim);
    }

    .case-img {
      width: 100%;
      display: block;
    }

    .case-info {
      padding: 24px;
    }

    .case-stats {
      font-family: 'Rajdhani', sans-serif;
      font-size: 28px;
      font-weight: 700;
      color: var(--accent-gold);
      margin-bottom: 8px;
    }

    .case-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 12px;
    }

    .tag {
      border: 1px solid var(--accent-gold);
      color: var(--accent-gold);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 12px;
    }

    /* 对比表 */
    .table-wrapper {
      overflow-x: auto;
      border-radius: var(--radius-md);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 700px;
      background: var(--primary-light);
    }

    .compare-table th, .compare-table td {
      padding: 20px 24px;
      text-align: center;
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }

    .compare-table th {
      background: var(--primary-deep);
      color: white;
      font-weight: 700;
    }

    .highlight-col {
      background: rgba(212, 175, 55, 0.08);
      border-left: 2px solid var(--accent-gold);
      border-right: 2px solid var(--accent-gold);
    }

    .badge-recommend {
      background: var(--accent-gold);
      color: var(--primary);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 700;
      display: inline-block;
      margin-bottom: 8px;
    }

    .check {
      color: var(--accent-cyan);
      font-weight: bold;
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .faq-item {
      background: rgba(17, 22, 51, 0.6);
      border-radius: var(--radius-sm);
      overflow: hidden;
    }

    .faq-question {
      padding: 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      border-left: 3px solid var(--accent-gold);
      transition: border-color 0.3s;
    }

    .faq-item.open .faq-question {
      border-left-color: var(--accent-cyan);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      padding: 0 20px;
      color: var(--text-body);
      background: rgba(0,0,0,0.2);
    }

    .faq-item.open .faq-answer {
      max-height: 200px;
      padding: 20px;
    }

    /* 数据带 */
    .trust-strip {
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      gap: 40px;
      text-align: center;
    }

    .trust-number {
      font-family: 'Rajdhani', sans-serif;
      font-size: 48px;
      font-weight: 700;
      color: var(--accent-gold);
    }

    /* CTA 横幅 */
    .cta-banner {
      background: var(--primary-deep);
      position: relative;
      overflow: hidden;
    }

    .cta-banner::before {
      content: '';
      position: absolute;
      width: 200px;
      height: 200px;
      background: radial-gradient(circle, rgba(0,240,255,0.2) 0%, transparent 70%);
      top: -50px;
      right: -50px;
    }

    .footer {
      background: var(--primary-deep);
      border-top: 1px solid rgba(212,175,55,0.2);
      padding: 60px 0 30px;
    }

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

    .social-icons i {
      font-size: 20px;
      margin-right: 16px;
      color: var(--accent-gold);
      transition: 0.3s;
    }

    .social-icons i:hover {
      color: white;
    }

    @media (max-width: 1024px) {
      h1 { font-size: 44px; }
      h2 { font-size: 34px; }
      .hero .container { flex-direction: column; }
      .hero-left, .hero-right { flex: auto; }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .values-grid, .solutions-grid { grid-template-columns: 1fr; }
      .cases-masonry { columns: 1; }
      .faq-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
    }