/* roulang page: index */
:root {
      --primary: #FF6A3D;
      --primary-dark: #D94A2B;
      --secondary-deep: #1E0A3C;
      --accent-green: #00E5A0;
      --bg-light: #F7F5F9;
      --card-white: #FFFFFF;
      --text-main: #1A1A2E;
      --text-secondary: #5C5C7A;
      --text-muted: #666666;
      --border-light: rgba(0,0,0,0.06);
      --radius-card: 24px;
      --radius-btn: 40px;
      --shadow-sm: 0 8px 30px rgba(0,0,0,0.06);
      --shadow-hover: 0 16px 40px rgba(0,0,0,0.12);
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'HarmonyOS Sans', system-ui, -apple-system, sans-serif;
      --transition: all 0.25s ease;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
      scroll-padding-top: 80px;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    img {
      max-width: 100%;
      display: block;
      height: auto;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }
    /* 导航 */
    .nav-bar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      backdrop-filter: blur(18px);
      background-color: rgba(30, 10, 60, 0.3);
      transition: background 0.3s ease, backdrop-filter 0.3s;
    }
    .nav-bar.scrolled {
      background-color: rgba(30, 10, 60, 0.9);
      backdrop-filter: blur(24px);
      box-shadow: 0 8px 24px rgba(0,0,0,0.2);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo {
      display: flex;
      align-items: baseline;
      font-weight: 800;
      font-size: 1.8rem;
      letter-spacing: -0.5px;
      color: white;
    }
    .logo-main {
      color: var(--primary);
      font-size: 1.9rem;
    }
    .logo-sub {
      font-size: 1rem;
      margin-left: 6px;
      color: rgba(255,255,255,0.85);
      font-weight: 500;
      letter-spacing: 0.3px;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-link {
      color: rgba(255,255,255,0.9);
      font-weight: 500;
      font-size: 0.95rem;
      transition: color 0.2s;
      position: relative;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .nav-cta {
      background: linear-gradient(135deg, #FF6A3D 0%, #D94A2B 100%);
      padding: 10px 24px;
      border-radius: 40px;
      color: white;
      font-weight: 600;
      transition: var(--transition);
      box-shadow: 0 6px 18px rgba(255,106,61,0.3);
      white-space: nowrap;
    }
    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 24px rgba(255,106,61,0.5);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .hamburger span {
      width: 26px;
      height: 2.5px;
      background: white;
      border-radius: 4px;
      transition: 0.2s;
    }
    /* 移动抽屉 */
    .mobile-drawer {
      position: fixed;
      top: 0;
      right: 0;
      width: 80%;
      max-width: 400px;
      height: 100vh;
      background: rgba(30, 10, 60, 0.97);
      backdrop-filter: blur(24px);
      transform: translateX(100%);
      transition: transform 0.35s ease;
      z-index: 2000;
      display: flex;
      flex-direction: column;
      padding: 32px 28px;
      gap: 28px;
    }
    .mobile-drawer.active {
      transform: translateX(0);
    }
    .drawer-link {
      font-size: 1.35rem;
      font-weight: 600;
      color: white;
      padding-left: 16px;
      border-left: 4px solid var(--primary);
      transition: 0.2s;
    }
    .drawer-close {
      align-self: flex-end;
      background: none;
      border: none;
      color: white;
      font-size: 2rem;
      cursor: pointer;
    }
    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(160deg, #1E0A3C 0%, #0F0520 60%, #2D1040 100%);
      position: relative;
      overflow: hidden;
    }
    .hero-canvas {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: 1;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      gap: 40px;
      width: 100%;
    }
    .hero-text {
      flex: 1 1 55%;
      color: white;
    }
    .hero-text h1 {
      font-size: clamp(2.8rem, 6vw, 3.8rem);
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 20px;
    }
    .hero-highlight {
      color: var(--primary);
    }
    .hero-sub {
      font-size: 1.2rem;
      color: rgba(255,255,255,0.8);
      margin-bottom: 36px;
      max-width: 500px;
    }
    .hero-buttons {
      display: flex;
      gap: 20px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, #FF6A3D 0%, #D94A2B 100%);
      color: white;
      border: none;
      padding: 14px 36px;
      border-radius: 40px;
      font-weight: 600;
      transition: var(--transition);
      box-shadow: 0 10px 20px rgba(255,106,61,0.4);
      cursor: pointer;
    }
    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 18px 30px rgba(255,106,61,0.6);
    }
    .btn-ghost {
      background: transparent;
      border: 2px solid white;
      color: white;
      padding: 14px 36px;
      border-radius: 40px;
      font-weight: 600;
      transition: var(--transition);
    }
    .btn-ghost:hover {
      background: rgba(255,255,255,0.15);
    }
    .hero-image {
      flex: 1 1 45%;
      animation: float 5s infinite alternate ease-in-out;
    }
    .hero-image img {
      border-radius: 32px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
      width: 100%;
      max-width: 520px;
    }
    @keyframes float {
      0% { transform: translateY(0); }
      100% { transform: translateY(-12px); }
    }
    /* 通用section */
    section {
      padding: 100px 0;
    }
    .section-title {
      text-align: center;
      font-size: 2.3rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .section-sub {
      text-align: center;
      color: var(--text-secondary);
      font-size: 1.1rem;
      margin-bottom: 60px;
    }
    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .stat-card {
      background: var(--card-white);
      border-radius: 24px;
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      text-align: center;
      border: 1px solid var(--border-light);
    }
    .stat-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-hover);
    }
    .stat-number {
      font-size: 3.4rem;
      font-weight: 800;
      background: linear-gradient(135deg, #FF6A3D, #00E5A0);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .stat-desc {
      margin-top: 10px;
      color: var(--text-secondary);
    }
    /* 服务矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .service-card {
      background: white;
      border-radius: 28px;
      padding: 28px;
      display: flex;
      gap: 20px;
      align-items: center;
      box-shadow: var(--shadow-sm);
      border-left: 5px solid var(--primary);
      transition: var(--transition);
    }
    .service-icon {
      width: 64px;
      height: 64px;
      background: linear-gradient(135deg, #FF6A3D, #D94A2B);
      border-radius: 18px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 2rem;
    }
    .service-text h3 {
      font-weight: 700;
      margin-bottom: 6px;
    }
    /* 对比区 */
    .comparison-wrapper {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 24px;
    }
    .vs-badge {
      width: 70px;
      height: 70px;
      background: radial-gradient(circle, #FF6A3D, #1E0A3C);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: 800;
      font-size: 1.6rem;
      box-shadow: 0 0 24px #FF6A3D;
    }
    .compare-col {
      flex:1;
      background: white;
      border-radius: 28px;
      padding: 30px;
    }
    .compare-col.left { background: #f0edf5; }
    .compare-col.right { background: white; border: 2px solid var(--primary); }
    /* FAQ */
    .faq-item {
      background: white;
      border-radius: 16px;
      border: 1px solid #e0e0e0;
      margin-bottom: 16px;
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 28px;
      font-weight: 700;
      display: flex;
      justify-content: space-between;
      cursor: pointer;
    }
    .faq-answer {
      padding: 0 28px 20px;
      color: #444;
      display: none;
    }
    .faq-item.active .faq-answer { display: block; background: #FFF3EF; }
    /* CTA */
    .cta-section {
      background: radial-gradient(circle at center, #2D1040, #0F0520);
      text-align: center;
      color: white;
    }
    .store-buttons img {
      height: 52px;
      margin: 0 12px;
    }
    footer {
      background: #1E0A3C;
      color: #ccc;
      padding: 48px 0 24px;
    }
    @media (max-width: 1024px) {
      .services-grid { grid-template-columns: repeat(2,1fr); }
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .hamburger { display: flex; }
      .hero-content { flex-direction: column; text-align: center; }
      .dashboard-grid, .services-grid { grid-template-columns: 1fr; }
      .comparison-wrapper { flex-direction: column; }
      .service-card { flex-direction: column; }
    }