/* roulang page: index */
:root {
      --primary: #0A84FF;
      --primary-dark: #0066CC;
      --accent-gold: #F59E0B;
      --ice-blue: #64D2FF;
      --bg-deep: #0B1120;
      --bg-darker: #060B14;
      --bg-card: rgba(255, 255, 255, 0.04);
      --bg-card-hover: rgba(255, 255, 255, 0.08);
      --text-primary: #FFFFFF;
      --text-secondary: #B0C4DE;
      --text-muted: #8899AA;
      --border-light: rgba(255, 255, 255, 0.08);
      --border-active: rgba(10, 132, 255, 0.4);
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-btn: 8px;
      --shadow-glow: 0 0 20px rgba(10, 132, 255, 0.5);
      --shadow-card: 0 20px 40px rgba(0, 0, 0, 0.4);
      --transition-smooth: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --container-max: 1280px;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-deep);
      color: var(--text-secondary);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

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

    /* 玻璃拟态工具类 */
    .glass-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      backdrop-filter: blur(2px);
    }

    .glass-nav {
      background: rgba(11, 17, 32, 0.75);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      transition: background 0.3s ease, box-shadow 0.3s ease;
    }

    .glass-nav.scrolled {
      background: rgba(11, 17, 32, 0.95);
      box-shadow: 0 10px 30px -10px rgba(0,0,0,0.5);
    }

    .btn-glow {
      background: var(--primary);
      color: white;
      border: none;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      letter-spacing: 0.01em;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      box-shadow: var(--shadow-glow);
      transition: all 0.3s ease;
      cursor: pointer;
      text-align: center;
    }

    .btn-glow:hover {
      background: #1E8EFF;
      box-shadow: 0 0 30px rgba(10, 132, 255, 0.7);
      transform: translateY(-2px);
      color: white;
    }

    .btn-ghost {
      background: transparent;
      border: 1px solid rgba(255, 255, 255, 0.3);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all 0.3s ease;
      cursor: pointer;
    }

    .btn-ghost:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
    }

    /* 布局 */
    .section {
      padding: 100px 0;
      position: relative;
      z-index: 2;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 20px;
      padding-left: 16px;
      border-left: 4px solid var(--primary);
      letter-spacing: 0.02em;
    }

    .section-desc {
      color: var(--text-muted);
      margin-bottom: 48px;
      font-size: 1.1rem;
      max-width: 700px;
      line-height: 1.8;
    }

    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      width: 100%;
      z-index: 1000;
      transition: background 0.3s;
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo {
      font-size: 1.425rem;
      font-weight: 700;
      color: white;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .logo span {
      color: var(--accent-gold);
      font-size: 14px;
      margin-left: 8px;
      background: rgba(245,158,11,0.15);
      padding: 2px 8px;
      border-radius: 20px;
      font-weight: 500;
    }
    .nav-links {
      display: flex;
      gap: 2rem;
    }
    .nav-links a {
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 0.95rem;
      position: relative;
      padding: 6px 0;
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background: var(--primary);
      box-shadow: 0 0 8px var(--primary);
      transition: width 0.3s ease;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 6px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .hamburger span {
      width: 28px;
      height: 2px;
      background: white;
      border-radius: 2px;
      transition: 0.3s;
    }

    /* Hero */
    .hero {
      min-height: 95vh;
      display: flex;
      align-items: center;
      padding-top: 80px;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 40%, rgba(10,132,255,0.08) 0%, transparent 60%);
      pointer-events: none;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 60px;
      align-items: center;
      position: relative;
    }
    .hero-left h1 {
      font-size: 3rem;
      font-weight: 800;
      color: white;
      line-height: 1.2;
      margin-bottom: 24px;
      letter-spacing: -0.01em;
    }
    .hero-left p {
      font-size: 1.2rem;
      color: var(--text-secondary);
      margin-bottom: 32px;
      max-width: 500px;
    }
    .hero-actions {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .hero-right img {
      width: 100%;
      border-radius: 20px;
      box-shadow: 0 30px 50px rgba(0,0,0,0.6);
      border: 1px solid rgba(255,255,255,0.1);
    }

    /* 亮点网格 */
    .highlights-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 24px;
    }
    .highlight-main {
      background-image: url('/assets/images/coverpic/cover-2.webp');
      background-size: cover;
      background-position: center;
      min-height: 350px;
      border-radius: var(--radius-lg);
      display: flex;
      align-items: flex-end;
      padding: 30px;
      position: relative;
    }
    .highlight-main .text-block {
      background: rgba(11,17,32,0.8);
      backdrop-filter: blur(8px);
      padding: 20px;
      border-radius: 12px;
      border-left: 3px solid var(--primary);
    }
    .highlight-card {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 28px;
      transition: var(--transition-smooth);
      display: flex;
      flex-direction: column;
    }
    .highlight-card:hover { transform: translateY(-8px); border-color: var(--border-active); }
    .data-number {
      font-size: 2.5rem;
      font-weight: 700;
      color: var(--accent-gold);
    }

    /* 案例瀑布 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      border-radius: var(--radius-lg);
      overflow: hidden;
      background: rgba(255,255,255,0.03);
      transition: 0.3s;
    }
    .case-card:hover { transform: translateY(-6px); box-shadow: 0 0 0 1px var(--border-active); }
    .case-img {
      height: 200px;
      background-size: cover;
    }

    /* 方案对比表 */
    .compare-table {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 16px;
    }
    .plan-col {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      padding: 28px;
      border: 1px solid transparent;
      transition: 0.3s;
      text-align: center;
    }
    .plan-col.recommended {
      border-color: var(--accent-gold);
      position: relative;
      transform: scale(1.02);
    }

    /* 双列FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .faq-item {
      background: rgba(255,255,255,0.02);
      border-radius: 12px;
    }

    /* CTA横幅 */
    .cta-banner {
      background: radial-gradient(circle at 20% 40%, #0A1A3A, #060B14);
      text-align: center;
    }

    footer {
      background: var(--bg-darker);
      padding: 70px 0 30px;
    }

    @media (max-width: 768px) {
      .hamburger { display: flex; }
      .nav-links { display: none; }
      .hero-grid, .highlights-grid, .case-grid, .compare-table, .faq-grid { grid-template-columns: 1fr; }
    }
    @media (min-width: 769px) {
      .mobile-menu { display: none; }
    }