/* roulang page: index */
:root {
      --deep-space: #0A0E27;
      --card-bg: #141832;
      --alternate-bg: #0F122E;
      --alternate-bg2: #181D3A;
      --neon-pink: #FF2D55;
      --neon-pink-hover: #FF5A7A;
      --neon-cyan: #00F0FF;
      --text-primary: #FFFFFF;
      --text-secondary: #B0B8D0;
      --text-muted: #8890B0;
      --border-dim: rgba(0, 240, 255, 0.15);
      --border-glow: rgba(0, 240, 255, 0.3);
      --border-pink: rgba(255, 45, 85, 0.5);
      --shadow-card: 0 4px 20px rgba(0, 240, 255, 0.08);
      --shadow-card-hover: 0 8px 32px rgba(255, 45, 85, 0.25);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-input: 6px;
      --font-title: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
      --font-body: 'PingFang SC', 'Inter', 'Noto Sans SC', sans-serif;
      --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
      --container-max: 1280px;
      --section-gap: 100px;
    }

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

    body {
      font-family: var(--font-body);
      background-color: var(--deep-space);
      color: var(--text-primary);
      line-height: 1.75;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

    /* 导航 */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      background: rgba(10, 14, 39, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-glow);
      z-index: 1000;
      transition: 0.3s;
    }
    .nav .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-family: var(--font-title);
      font-weight: 800;
      font-size: 24px;
      letter-spacing: 1px;
      color: #fff;
      text-decoration: none;
      white-space: nowrap;
    }
    .logo-icon {
      font-size: 28px;
      color: var(--neon-cyan);
      filter: drop-shadow(0 0 6px var(--neon-cyan));
    }
    .nav-links {
      display: flex;
      gap: 36px;
      list-style: none;
    }
    .nav-links a {
      color: var(--text-secondary);
      text-decoration: none;
      font-weight: 500;
      font-size: 16px;
      transition: color 0.2s;
      position: relative;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--neon-cyan);
    }
    .btn-nav {
      background: transparent;
      border: 1.5px solid var(--neon-cyan);
      color: var(--neon-cyan);
      padding: 8px 22px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 15px;
      text-decoration: none;
      transition: 0.25s;
      white-space: nowrap;
    }
    .btn-nav:hover {
      background: rgba(0, 240, 255, 0.1);
      border-color: var(--neon-pink);
      color: var(--neon-pink);
      box-shadow: 0 0 16px rgba(255, 45, 85, 0.4);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .hamburger span {
      width: 26px;
      height: 2px;
      background: var(--neon-cyan);
      transition: 0.3s;
    }

    /* 按钮系统 */
    .btn-primary {
      background: var(--neon-pink);
      color: #fff;
      font-weight: 700;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      text-decoration: none;
      display: inline-block;
      border: none;
      cursor: pointer;
      transition: 0.25s;
      font-size: 16px;
      text-align: center;
    }
    .btn-primary:hover {
      background: var(--neon-pink-hover);
      box-shadow: 0 0 24px rgba(255, 45, 85, 0.6);
      transform: scale(1.03);
    }
    .btn-secondary {
      background: transparent;
      border: 1.5px solid var(--neon-cyan);
      color: var(--neon-cyan);
      padding: 12px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      text-decoration: none;
      transition: 0.25s;
      display: inline-block;
    }
    .btn-secondary:hover {
      background: rgba(0, 240, 255, 0.1);
      border-color: var(--neon-pink);
      color: var(--neon-pink);
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding-top: 80px;
      background: radial-gradient(circle at 30% 50%, rgba(0,240,255,0.08) 0%, transparent 60%);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 5fr 7fr;
      gap: 48px;
      align-items: center;
    }
    .hero-text h1 {
      font-family: var(--font-title);
      font-size: 56px;
      font-weight: 900;
      line-height: 1.1;
      letter-spacing: -0.02em;
      margin-bottom: 20px;
    }
    .hero-text .sub {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 32px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .hero-visual {
      position: relative;
      height: 420px;
      border-radius: 24px;
      overflow: hidden;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      clip-path: polygon(6% 0, 100% 0, 94% 100%, 0% 100%);
      box-shadow: 0 0 40px rgba(0,240,255,0.25);
    }
    .hero-visual::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(10,14,39,0.5) 0%, transparent 70%);
      pointer-events: none;
    }

    section {
      padding: var(--section-gap) 0;
    }

    h2 {
      font-family: var(--font-title);
      font-size: 40px;
      font-weight: 800;
      margin-bottom: 48px;
      letter-spacing: -0.01em;
    }

    /* 亮点网格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--card-bg);
      border: 1px solid var(--border-dim);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      transition: 0.3s;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-pink);
      box-shadow: var(--shadow-card-hover);
    }
    .feature-icon {
      font-size: 36px;
      color: var(--neon-cyan);
      margin-bottom: 16px;
      filter: drop-shadow(0 0 8px var(--neon-cyan));
    }
    .feature-card h3 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .feature-card p {
      color: var(--text-muted);
      font-size: 15px;
    }

    /* 案例瀑布流 */
    .cases-masonry {
      columns: 3;
      column-gap: 24px;
    }
    .case-card {
      break-inside: avoid;
      margin-bottom: 24px;
      background: var(--card-bg);
      border-radius: var(--radius-card);
      overflow: hidden;
      border: 1px solid var(--border-dim);
      transition: 0.3s;
    }
    .case-card:hover {
      border-color: var(--neon-pink);
      box-shadow: var(--shadow-card-hover);
    }
    .case-img {
      width: 100%;
      display: block;
      transition: 0.4s;
    }
    .case-card:hover .case-img {
      transform: scale(1.05);
    }
    .case-label {
      padding: 16px;
      font-weight: 600;
      background: linear-gradient(to top, rgba(20,24,50,0.9), transparent);
      color: #fff;
    }

    /* 对比表 */
    .compare-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .compare-table {
      background: var(--alternate-bg);
      border-radius: var(--radius-card);
      padding: 32px;
      border: 1px solid var(--border-dim);
    }
    .compare-table.right {
      border-color: var(--neon-cyan);
      box-shadow: 0 0 30px rgba(0,240,255,0.2);
    }
    .compare-table h3 {
      font-size: 26px;
      margin-bottom: 24px;
    }
    .compare-row {
      display: flex;
      justify-content: space-between;
      padding: 14px 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }

    /* 数据滚动 */
    .stats-scroll {
      display: flex;
      gap: 32px;
      overflow-x: auto;
      padding: 16px 0 32px;
      scrollbar-width: thin;
    }
    .stat-card {
      flex: 0 0 200px;
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      text-align: center;
      border: 1px solid var(--border-dim);
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 48px;
      color: var(--neon-cyan);
      text-shadow: 0 0 12px var(--neon-cyan);
    }

    /* FAQ */
    .faq-item {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      margin-bottom: 16px;
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 24px;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-answer {
      padding: 0 24px 20px;
      color: var(--text-muted);
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
    }
    .faq-item.open .faq-question {
      color: var(--neon-pink);
      border-left: 3px solid var(--neon-pink);
    }

    /* CTA 横幅 */
    .cta-banner {
      background: radial-gradient(circle at center, rgba(0,240,255,0.12) 0%, transparent 70%);
      text-align: center;
      padding: 80px 24px;
      border-radius: 32px;
      margin: 0 24px;
    }

    /* 页脚 */
    .footer {
      background: #0F122E;
      border-top: 1px solid rgba(0,240,255,0.2);
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
    }
    .copyright {
      text-align: center;
      color: var(--text-muted);
      margin-top: 40px;
      font-size: 14px;
    }

    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .features-grid { grid-template-columns: repeat(2, 1fr); }
      .cases-masonry { columns: 2; }
    }
    @media (max-width: 768px) {
      .nav-links, .btn-nav { display: none; }
      .hamburger { display: flex; }
      .features-grid { grid-template-columns: 1fr; }
      .compare-wrapper { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      h1 { font-size: 40px; }
      h2 { font-size: 32px; }
    }