/* roulang page: index */
:root {
      --primary-deep: #0A0E17;
      --accent-purple: #B44BFF;
      --accent-orange: #FF6B2C;
      --cold-white: #F2F4F8;
      --dark-surface: #141820;
      --border-subtle: rgba(255,255,255,0.06);
      --text-primary: #ffffff;
      --text-secondary: #B0B8C5;
      --radius-sm: 6px;
      --transition-fast: 0.2s ease;
      --shadow-glow: 0 0 12px rgba(180,75,255,0.25);
    }

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

    body {
      font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background-color: var(--primary-deep);
      color: var(--text-secondary);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    /* 顶部信息条 */
    .top-bar-custom {
      background: #000;
      height: 36px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      font-size: 12px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 32px;
      color: #8a8f98;
    }
    .domain-hint {
      letter-spacing: 0.5px;
    }
    .top-action {
      color: var(--accent-orange);
      font-weight: 600;
      transition: opacity 0.2s;
    }
    .top-action:hover {
      opacity: 0.85;
      text-decoration: underline;
    }

    /* 主导航 */
    .main-nav {
      background: var(--primary-deep);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 32px;
      height: 72px;
      position: sticky;
      top: 0;
      z-index: 50;
      border-bottom: 1px solid var(--border-subtle);
    }
    .brand {
      font-size: 28px;
      font-weight: 700;
      letter-spacing: 1px;
      background: linear-gradient(135deg, #B44BFF 0%, #FF6B2C 90%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .nav-links {
      display: flex;
      gap: 2.2rem;
      align-items: center;
    }
    .nav-links a {
      color: #ccc;
      font-weight: 500;
      font-size: 1rem;
      padding-bottom: 6px;
      border-bottom: 2px solid transparent;
      transition: 0.2s;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: white;
      border-bottom-color: var(--accent-orange);
    }
    .hamburger {
      display: none;
      font-size: 1.8rem;
      color: white;
      cursor: pointer;
    }

    /* 板块通用 */
    section {
      padding: 80px 0;
    }
    .section-dark {
      background: var(--primary-deep);
    }
    .section-darker {
      background: #0A0E17;
    }
    .section-surface {
      background: var(--dark-surface);
    }

    h2 {
      font-size: 40px;
      font-weight: 700;
      color: white;
      margin-bottom: 1.5rem;
      letter-spacing: -0.5px;
    }
    h3 {
      font-size: 24px;
      font-weight: 600;
      color: white;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 32px;
      border-radius: 40px;
      font-weight: 600;
      transition: all 0.25s;
      border: none;
      cursor: pointer;
      gap: 8px;
    }
    .btn-primary {
      background: var(--accent-purple);
      color: white;
      box-shadow: 0 8px 18px rgba(180,75,255,0.3);
    }
    .btn-primary:hover {
      background: var(--accent-orange);
      color: #000;
      box-shadow: 0 10px 20px rgba(255,107,44,0.35);
    }
    .btn-ghost {
      background: transparent;
      border: 1.5px solid white;
      color: white;
    }
    .btn-ghost:hover {
      border-color: var(--accent-purple);
      background: rgba(180,75,255,0.08);
      color: white;
    }

    /* Hero双栏 */
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
      background: radial-gradient(circle at 80% 20%, rgba(180,75,255,0.12) 0%, #0A0E17 70%);
    }
    .hero-left h1 {
      font-size: 56px;
      font-weight: 700;
      color: white;
      line-height: 1.2;
      margin-bottom: 1.5rem;
    }
    .hero-highlight {
      color: var(--accent-purple);
    }
    .hero-sub {
      font-size: 18px;
      color: #B0B8C5;
      margin-bottom: 2.2rem;
    }
    .hero-visual {
      background: rgba(20,24,32,0.7);
      border-radius: 20px;
      overflow: hidden;
      border: 1px solid rgba(255,255,255,0.05);
      animation: softGlow 3s infinite alternate;
    }
    @keyframes softGlow {
      0% { box-shadow: 0 0 8px rgba(180,75,255,0.2); }
      100% { box-shadow: 0 0 25px rgba(255,107,44,0.3); }
    }

    /* 亮点网格 4x2不对称 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
    }
    .feature-item {
      border: 1px solid var(--border-subtle);
      padding: 28px 20px;
      border-radius: var(--radius-sm);
      transition: all 0.25s;
      background: transparent;
    }
    .feature-item:hover {
      border-color: var(--accent-purple);
      transform: translateY(-4px);
      box-shadow: 0 0 16px rgba(180,75,255,0.15);
    }
    .feature-icon {
      font-size: 32px;
      color: var(--accent-purple);
      margin-bottom: 16px;
    }

    /* 案例瀑布流 */
    .case-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
    }
    .case-card {
      background: var(--dark-surface);
      border-radius: var(--radius-sm);
      overflow: hidden;
      border: 1px solid var(--border-subtle);
      transition: 0.2s;
    }
    .case-card:hover {
      border-color: var(--accent-purple);
      transform: translateY(-5px);
    }
    .case-card img {
      transition: transform 0.4s;
    }
    .case-card:hover img {
      transform: scale(1.03);
    }
    .case-tag {
      background: var(--accent-orange);
      color: #000;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 12px;
      display: inline-block;
    }

    /* 方案对比 */
    .compare-table {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 0;
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      overflow: hidden;
    }
    .compare-col {
      padding: 28px;
    }
    .compare-col.right {
      background: rgba(180,75,255,0.03);
    }
    .compare-row {
      display: flex;
      justify-content: space-between;
      padding: 14px 0;
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }

    /* 数据条 */
    .stat-number {
      font-size: 64px;
      font-weight: 700;
      background: linear-gradient(135deg, #FF6B2C, #B44BFF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* FAQ */
    .accordion-title {
      font-size: 1.1rem;
      border: none;
      background: transparent;
      color: white;
    }

    /* CTA脉冲 */
    .pulse-ring {
      animation: pulseRing 2s infinite;
    }
    @keyframes pulseRing {
      0% { box-shadow: 0 0 0 0 rgba(180,75,255,0.5); }
      70% { box-shadow: 0 0 0 18px rgba(180,75,255,0); }
      100% { box-shadow: 0 0 0 0 rgba(180,75,255,0); }
    }

    footer {
      background: #000;
      color: #8a8f98;
      font-size: 14px;
    }

    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .features-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: block; }
      .case-grid { grid-template-columns: 1fr; }
      .compare-table { grid-template-columns: 1fr; }
    }