/* roulang page: index */
:root {
      --primary-deep: #0A0E27;
      --primary-bg: #141832;
      --accent-cyan: #00E5FF;
      --accent-red: #FF3D00;
      --white: #FFFFFF;
      --text-main: rgba(255, 255, 255, 0.75);
      --text-dim: rgba(255, 255, 255, 0.5);
      --text-bright: #E8F4FF;
      --card-bg: rgba(255, 255, 255, 0.04);
      --card-border: rgba(255, 255, 255, 0.08);
      --card-hover-border: rgba(255, 255, 255, 0.2);
      --glass-blur: blur(20px);
      --radius-card: 16px;
      --radius-btn: 50px;
      --radius-tag: 20px;
      --radius-input: 12px;
      --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
      --shadow-glow: 0 12px 40px rgba(0, 229, 255, 0.15);
      --font-mono: 'JetBrains Mono', 'Consolas', 'Monaco', monospace;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --nav-height: 72px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      background: linear-gradient(135deg, var(--primary-deep) 0%, #141832 100%);
      color: var(--text-main);
      font-family: var(--font-sans);
      line-height: 1.6;
      margin: 0;
      overflow-x: hidden;
      background-attachment: fixed;
    }

    /* 网格纹理背景 */
    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: 
        linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px);
      background-size: 40px 40px;
      pointer-events: none;
      z-index: -1;
    }

    .container-custom {
      max-width: 1320px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航 */
    .navbar-custom {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--nav-height);
      background: rgba(10, 14, 39, 0.9);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(0, 229, 255, 0.2);
      z-index: 1000;
      display: flex;
      align-items: center;
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 100%;
      max-width: 1320px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      font-size: 28px;
      font-weight: 700;
      color: var(--white);
      letter-spacing: 2px;
      text-decoration: none;
      display: flex;
      align-items: center;
    }
    .logo span {
      color: var(--accent-cyan);
      margin-right: 4px;
    }

    .nav-links {
      display: flex;
      gap: 40px;
      align-items: center;
    }

    .nav-link-item {
      font-size: 15px;
      font-weight: 500;
      color: rgba(255, 255, 255, 0.7);
      text-decoration: none;
      position: relative;
      padding: 8px 0;
      transition: color 0.3s, transform 0.2s;
    }

    .nav-link-item:hover {
      color: var(--white);
      transform: translateY(-2px);
    }

    .nav-link-item.active {
      color: var(--white);
    }

    .nav-link-item.active::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--accent-cyan);
      box-shadow: 0 0 12px var(--accent-cyan);
      border-radius: 2px;
    }

    .hamburger {
      display: none;
      font-size: 24px;
      color: var(--accent-cyan);
      cursor: pointer;
    }

    /* Hero */
    .hero {
      padding: calc(var(--nav-height) + 40px) 0 60px;
      min-height: 100vh;
      display: flex;
      align-items: center;
    }

    .hero-grid {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 40px;
    }

    .hero-left {
      flex: 1 1 60%;
    }

    .hero-right {
      flex: 1 1 35%;
      position: relative;
    }

    .hero h1 {
      font-size: 44px;
      font-weight: 700;
      color: var(--white);
      line-height: 1.3;
      margin-bottom: 20px;
    }

    .hero .subtitle {
      font-size: 18px;
      color: var(--text-main);
      margin-bottom: 32px;
      max-width: 600px;
    }

    .btn-group {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
      margin-bottom: 28px;
    }

    .btn-primary-glow {
      background: var(--accent-cyan);
      border: none;
      color: #0A0E27;
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-size: 16px;
      transition: all 0.3s ease;
      box-shadow: 0 0 20px rgba(0, 229, 255, 0.4);
    }

    .btn-primary-glow:hover {
      box-shadow: 0 0 35px rgba(0, 229, 255, 0.7);
      transform: scale(1.03);
      background: #33eaff;
    }

    .btn-outline-cyan {
      background: transparent;
      border: 2px solid var(--accent-cyan);
      color: var(--accent-cyan);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-size: 16px;
      transition: all 0.3s;
    }

    .btn-outline-cyan:hover {
      background: var(--accent-cyan);
      color: #0A0E27;
    }

    .live-ticker {
      background: rgba(255, 255, 255, 0.05);
      border-radius: 30px;
      padding: 10px 20px;
      overflow: hidden;
      white-space: nowrap;
      color: var(--accent-cyan);
      font-weight: 500;
      backdrop-filter: blur(8px);
    }

    .hero-image-card {
      background: rgba(255, 255, 255, 0.03);
      backdrop-filter: blur(20px);
      border-radius: 24px;
      overflow: hidden;
      border: 1px solid rgba(255,255,255,0.1);
    }

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

    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-bright);
      margin-bottom: 20px;
    }

    /* 六宫格亮点 */
    .grid-highlights {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .highlight-card {
      background: var(--card-bg);
      backdrop-filter: var(--glass-blur);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-card);
      height: 220px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .highlight-card:nth-child(odd) {
      border-left: 4px solid var(--accent-cyan);
    }
    .highlight-card:nth-child(even) {
      border-left: 4px solid var(--accent-red);
    }

    .highlight-card:hover {
      transform: translateY(-8px);
      border-color: var(--card-hover-border);
      box-shadow: var(--shadow-glow);
      background: rgba(255,255,255,0.06);
    }

    .stat-number {
      font-family: var(--font-mono);
      font-size: 36px;
      font-weight: 800;
      color: var(--accent-red);
      margin: 12px 0 8px;
    }

    /* 瀑布流 */
    .masonry-grid {
      columns: 3;
      column-gap: 32px;
    }

    .article-card {
      break-inside: avoid;
      background: rgba(255,255,255,0.03);
      border: 1px solid rgba(255,255,255,0.06);
      border-radius: 16px;
      overflow: hidden;
      margin-bottom: 32px;
      transition: all 0.3s;
      box-shadow: 0 4px 16px rgba(0,0,0,0.2);
    }

    .article-card:hover {
      box-shadow: 0 12px 32px rgba(0,229,255,0.15);
    }

    .article-img {
      width: 100%;
      height: auto;
      aspect-ratio: 16/9;
      object-fit: cover;
    }

    /* 方案对比 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .pricing-card {
      background: var(--card-bg);
      backdrop-filter: blur(16px);
      border: 1px solid var(--card-border);
      border-radius: 20px;
      padding: 32px 20px;
      text-align: center;
      transition: 0.3s;
    }

    .pricing-card.featured {
      border: 2px solid var(--accent-cyan);
      box-shadow: 0 0 30px rgba(0,229,255,0.25);
      position: relative;
    }

    .badge-popular {
      background: var(--accent-red);
      color: white;
      border-radius: 20px;
      padding: 4px 16px;
      font-size: 13px;
      font-weight: 600;
    }

    /* FAQ */
    .faq-container {
      display: flex;
      gap: 40px;
    }

    .faq-left {
      flex: 1;
    }
    .faq-right {
      flex: 1.2;
      background: rgba(255,255,255,0.02);
      border-radius: 16px;
      padding: 24px;
      border-left: 2px solid var(--accent-cyan);
    }

    /* 响应式 */
    @media (max-width: 992px) {
      .grid-highlights { grid-template-columns: repeat(2,1fr); }
      .masonry-grid { columns: 2; }
      .pricing-grid { grid-template-columns: repeat(2,1fr); }
      .faq-container { flex-direction: column; }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: block; }
      .hero-grid { flex-direction: column; }
      .grid-highlights { grid-template-columns: 1fr; }
      .masonry-grid { columns: 1; }
      .pricing-grid { grid-template-columns: 1fr; }
      .btn-group { flex-direction: column; align-items: stretch; }
    }

    footer {
      background: #060A1A;
      border-top: 1px solid rgba(0,229,255,0.2);
      padding: 60px 0 30px;
    }