/* roulang page: index */
:root {
      --primary: #0A0E27;
      --primary-light: #141B3A;
      --accent: #E94057;
      --neon: #00E5FF;
      --bg-light: #F4F4F9;
      --card-dark: #1E2340;
      --text-muted: #8A8FA8;
      --white: #FFFFFF;
      --shadow-sm: 0 8px 30px rgba(10, 14, 39, 0.06);
      --shadow-hover: 0 16px 40px rgba(10, 14, 39, 0.12);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-full: 9999px;
      --font-stack: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      --max-width: 1280px;
      --nav-height: 76px;
    }

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

    html {
      scroll-behavior: smooth;
      scroll-padding-top: var(--nav-height);
    }

    body {
      font-family: var(--font-stack);
      background-color: var(--bg-light);
      color: var(--primary);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      text-decoration: none;
      color: inherit;
    }

    button, .btn {
      font-family: inherit;
      cursor: pointer;
      border: none;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
    }

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

    /* 导航栏 - 玻璃效果 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(10, 14, 39, 0.05);
      height: var(--nav-height);
      display: flex;
      align-items: center;
    }

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

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.8rem;
      letter-spacing: -0.5px;
      color: var(--primary);
      position: relative;
    }
    .logo-icon {
      display: inline-block;
      width: 8px;
      height: 28px;
      background: var(--accent);
      border-radius: 4px;
      margin-right: 2px;
      transform: skewX(-15deg);
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }

    .nav-menu a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--primary);
      padding: 8px 0;
      position: relative;
      transition: color 0.2s;
    }

    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--neon);
      transition: width 0.25s ease;
    }

    .nav-menu a:hover {
      color: var(--primary);
    }
    .nav-menu a:hover::after {
      width: 100%;
    }

    .nav-cta {
      background: var(--accent);
      color: white;
      padding: 10px 24px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 0.9rem;
      transition: filter 0.2s, transform 0.2s;
      white-space: nowrap;
    }
    .nav-cta:hover {
      filter: brightness(1.1);
      transform: translateY(-1px);
    }

    /* 移动端底部导航 */
    .mobile-nav {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(16px);
      border-top: 1px solid rgba(0,0,0,0.05);
      z-index: 1000;
      justify-content: space-around;
      padding: 8px 16px 12px;
      box-shadow: 0 -4px 15px rgba(0,0,0,0.04);
    }
    .mobile-nav a {
      display: flex;
      flex-direction: column;
      align-items: center;
      font-size: 0.7rem;
      color: var(--text-muted);
      gap: 4px;
      font-weight: 500;
      transition: color 0.2s;
    }
    .mobile-nav i {
      font-size: 1.3rem;
    }
    .mobile-nav .active {
      color: var(--accent);
    }

    /* Hero */
    .hero {
      background: linear-gradient(135deg, #0A0E27 0%, #141B3A 100%);
      min-height: 95vh;
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
      margin-top: 0;
      padding: 120px 0 80px;
    }
    .hero::before {
      content: '';
      position: absolute;
      right: 10%;
      top: 20%;
      width: 320px;
      height: 320px;
      background: radial-gradient(circle, rgba(0,229,255,0.2) 0%, transparent 70%);
      border-radius: 50%;
      filter: blur(40px);
    }
    .neon-lines {
      position: absolute;
      right: 8%;
      top: 25%;
      width: 280px;
      height: 280px;
      border: 2px solid rgba(0,229,255,0.25);
      border-radius: 30% 70% 50% 50% / 30% 40% 60% 70%;
      animation: neonPulse 2s infinite alternate ease-in-out;
      pointer-events: none;
    }
    @keyframes neonPulse {
      0% { opacity: 0.4; transform: scale(1); }
      100% { opacity: 0.9; transform: scale(1.03); }
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 650px;
    }
    .hero h1 {
      font-size: 56px;
      line-height: 1.15;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: white;
      margin-bottom: 20px;
    }
    .hero .subtitle {
      font-size: 18px;
      color: rgba(255,255,255,0.75);
      margin-bottom: 36px;
      max-width: 480px;
    }
    .hero-buttons {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-full);
      font-weight: 600;
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .btn-primary:hover {
      transform: scale(1.05);
      box-shadow: 0 10px 25px rgba(233,64,87,0.4);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--neon);
      color: white;
      padding: 14px 32px;
      border-radius: var(--radius-full);
      font-weight: 600;
      transition: 0.2s;
    }
    .btn-outline:hover {
      background: rgba(0,229,255,0.1);
      transform: scale(1.05);
    }

    .hero-stats {
      display: flex;
      gap: 48px;
      margin-top: 50px;
      color: white;
    }
    .stat-number {
      font-size: 40px;
      font-weight: 700;
      color: var(--neon);
      display: block;
    }

    /* 通用板块 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 40px;
      font-weight: 600;
      line-height: 1.25;
      margin-bottom: 16px;
      color: var(--primary);
    }
    .section-sub {
      color: var(--text-muted);
      margin-bottom: 48px;
    }

    /* 品牌价值 1+2 布局 */
    .value-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }
    .big-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: center;
      transition: 0.25s ease;
    }
    .big-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .small-cards {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .small-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: 0.25s;
    }
    .small-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    .icon-neon {
      font-size: 2rem;
      color: var(--neon);
      margin-bottom: 16px;
    }

    /* 图文交错 */
    .feature-row {
      display: flex;
      align-items: center;
      gap: 60px;
      margin-bottom: 80px;
    }
    .feature-row.reverse {
      flex-direction: row-reverse;
    }
    .feature-text {
      flex: 1;
    }
    .feature-img {
      flex: 1;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      background: #e0e0e0;
    }
    .feature-img img {
      width: 100%;
      height: auto;
      object-fit: cover;
    }

    /* 场景区 */
    .scene-section {
      background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
      position: relative;
      padding: 100px 0;
      background-color: #0A0E27;
    }
    .scene-overlay {
      position: absolute;
      inset: 0;
      background: rgba(10,14,39,0.8);
    }
    .scene-card {
      position: relative;
      background: rgba(255,255,255,0.12);
      backdrop-filter: blur(10px);
      border-radius: var(--radius-lg);
      padding: 40px;
      color: white;
      max-width: 700px;
      margin: 0 auto;
    }

    /* 案例横向滚动 */
    .case-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 10px;
      scroll-snap-type: x mandatory;
    }
    .case-card {
      flex: 0 0 280px;
      background: var(--card-dark);
      color: white;
      border-radius: var(--radius-md);
      padding: 24px;
      scroll-snap-align: start;
    }
    .case-number {
      font-size: 32px;
      font-weight: 700;
      color: var(--accent);
    }

    /* 合作模式 */
    .pricing-grid {
      display: flex;
      gap: 24px;
      align-items: flex-start;
      justify-content: center;
      flex-wrap: wrap;
    }
    .plan-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 36px;
      flex: 1;
      min-width: 250px;
      box-shadow: var(--shadow-sm);
      transition: 0.25s;
    }
    .plan-highlight {
      border: 2px solid var(--accent);
      position: relative;
      transform: scale(1.03);
    }
    .badge {
      background: var(--accent);
      color: white;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.75rem;
      font-weight: 600;
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .faq-item {
      background: white;
      border-radius: var(--radius-md);
      padding: 16px 20px;
      border-left: 3px solid var(--neon);
      transition: 0.2s;
    }

    /* CTA 横幅 */
    .cta-banner {
      background: var(--primary);
      text-align: center;
      padding: 80px 20px;
      color: white;
    }

    /* Footer */
    .footer {
      background: #0E1124;
      color: #ccc;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
    }

    @media (max-width: 1024px) {
      .hero h1 { font-size: 44px; }
    }
    @media (max-width: 768px) {
      .header { display: none; }
      .mobile-nav { display: flex; }
      .hero { padding: 120px 20px 60px; text-align: center; }
      .hero h1 { font-size: 36px; }
      .value-grid { grid-template-columns: 1fr; }
      .feature-row, .feature-row.reverse { flex-direction: column; }
      .faq-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .hero-stats { justify-content: center; }
    }