/* roulang page: index */
/* 全局设计与重置 */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --deep-bg: #0B0E14;
      --cyan: #00F0FF;
      --cyan-dark: #00C8FF;
      --red: #FF3A3A;
      --red-dark: #E03232;
      --white: #FFFFFF;
      --text-primary: #E0E0E0;
      --text-secondary: #B0B8C1;
      --text-muted: #6B7280;
      --card-bg: rgba(255, 255, 255, 0.03);
      --card-border: rgba(0, 240, 255, 0.08);
      --card-hover-border: rgba(0, 240, 255, 0.4);
      --input-bg: #1A1E26;
      --input-border: rgba(255, 255, 255, 0.08);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 4px;
      --font-mono: 'JetBrains Mono', monospace;
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    }
    html {
      scroll-behavior: smooth;
      background-color: var(--deep-bg);
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--deep-bg);
      color: var(--text-secondary);
      font-size: 16px;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    h1, h2, h3 {
      font-weight: 700;
      color: var(--white);
    }
    h1 {
      font-size: 56px;
      line-height: 1.1;
      letter-spacing: -0.02em;
      background: linear-gradient(135deg, var(--cyan), var(--cyan-dark));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    h2 {
      font-size: 36px;
      line-height: 1.2;
      display: flex;
      align-items: center;
      gap: 16px;
      margin-bottom: 40px;
    }
    h2::before {
      content: '';
      display: inline-block;
      width: 4px;
      height: 32px;
      background: var(--cyan);
      border-radius: 2px;
    }
    h3 {
      font-size: 20px;
      line-height: 1.3;
      color: var(--text-primary);
    }
    p {
      margin-bottom: 1.5em;
      color: var(--text-secondary);
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color var(--transition-fast);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, .btn {
      cursor: pointer;
      border: none;
      background: none;
      font-family: inherit;
    }
    .section {
      padding: 100px 0;
    }
    @media (max-width: 1023px) {
      h1 { font-size: 40px; }
      h2 { font-size: 30px; }
      .section { padding: 80px 0; }
    }
    @media (max-width: 767px) {
      h1 { font-size: 32px; }
      h2 { font-size: 26px; }
      .section { padding: 60px 0; }
    }

    /* 导航系统 - 固定顶部深色玻璃效果 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(11, 14, 20, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(0, 240, 255, 0.1);
      z-index: 1000;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 32px;
      transition: height 0.3s;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 24px;
      font-weight: 800;
      color: var(--cyan);
      letter-spacing: -0.01em;
    }
    .logo-icon {
      width: 32px;
      height: 32px;
      background: var(--cyan);
      mask: url('data:image/svg+xml;utf8,<svg viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path d="M12 2L2 22h20L12 2zm0 4l6.5 12h-13L12 6z"/><circle cx="12" cy="15" r="1.5" fill="currentColor"/></svg>') center/contain no-repeat;
      background: var(--cyan);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-secondary);
      position: relative;
      padding: 6px 0;
      transition: color var(--transition-fast);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--cyan);
      transition: width 0.3s ease;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--cyan);
    }
    .nav-link:hover::after, .nav-link.active::after {
      width: 100%;
    }
    .nav-cta {
      background: transparent;
      border: 1px solid var(--cyan);
      color: var(--cyan);
      padding: 8px 20px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 15px;
      transition: all var(--transition-fast);
      margin-left: 12px;
    }
    .nav-cta:hover {
      background: rgba(0, 240, 255, 0.08);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--cyan);
      transition: all 0.3s;
    }
    @media (max-width: 767px) {
      .navbar { padding: 0 20px; height: 64px; }
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .mobile-menu {
        display: none;
        position: fixed;
        top: 64px;
        left: 0;
        width: 100%;
        height: calc(100vh - 64px);
        background: #0B0E14;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 36px;
        z-index: 999;
      }
      .mobile-menu.active { display: flex; }
      .mobile-menu .nav-link { font-size: 22px; }
    }

    /* 按钮体系 */
    .btn-primary {
      background: var(--cyan);
      color: var(--deep-bg);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all var(--transition-fast);
      border: none;
    }
    .btn-primary:hover {
      background: var(--cyan-dark);
      transform: scale(1.03);
    }
    .btn-secondary {
      background: transparent;
      border: 1px solid var(--cyan);
      color: var(--cyan);
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all var(--transition-fast);
    }
    .btn-secondary:hover {
      background: rgba(0, 240, 255, 0.08);
    }
    .btn-submit {
      background: var(--red);
      color: var(--white);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      width: 100%;
      font-size: 17px;
      transition: background var(--transition-fast);
    }
    .btn-submit:hover {
      background: var(--red-dark);
    }

    /* 卡片通用 */
    .glow-card {
      background: rgba(255, 255, 255, 0.03);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid rgba(0, 240, 255, 0.08);
      border-radius: var(--radius-card);
      padding: 28px;
      transition: border-color 0.25s, box-shadow 0.25s;
    }
    .glow-card:hover {
      border-color: rgba(0, 240, 255, 0.5);
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.1);
    }

    /* Hero区域特殊背景 */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background-image: url('/assets/images/backpic/back-1.webp'), radial-gradient(circle at 30% 40%, #0a1a2b, #0B0E14);
      background-blend-mode: overlay;
      background-size: cover;
      background-position: center;
    }

    .footer {
      background: #080B10;
      border-top: 1px solid rgba(0, 240, 255, 0.1);
      padding: 56px 0 28px;
    }
    .compare-left { border-color: rgba(255,255,255,0.05); background: rgba(255,255,255,0.02); }