/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    :root {
      --primary: #7B2FF7;
      --accent: #FF5E13;
      --highlight: #00F0FF;
      --dark-bg: #0D0B1E;
      --light-bg: #F4F5F9;
      --card-bg: #FFFFFF;
      --text-dark: #1A1A2E;
      --text-mid: #5A5A72;
      --text-light: #B0B0C0;
      --white: #FFFFFF;
      --radius-card: 16px;
      --radius-btn: 8px;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--light-bg);
      color: var(--text-dark);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      scroll-behavior: smooth;
    }
    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 72px;
      background: rgba(13, 11, 30, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      z-index: 1000;
      border-bottom: 1px solid rgba(255,255,255,0.05);
      transition: background 0.3s ease;
    }
    .navbar.scrolled {
      background: rgba(13, 11, 30, 0.95);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-text {
      font-size: 1.6rem;
      font-weight: 800;
      background: linear-gradient(135deg, #7B2FF7 0%, #b17fff 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      letter-spacing: -0.5px;
      text-decoration: none;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
    }
    .nav-links a {
      color: var(--text-light);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: color 0.2s, border-color 0.2s;
      border-bottom: 2px solid transparent;
      padding-bottom: 4px;
    }
    .nav-links a:hover {
      color: var(--highlight);
      border-bottom-color: var(--highlight);
    }
    .nav-cta {
      background: var(--accent);
      color: white !important;
      padding: 0.6rem 1.6rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border-bottom: none !important;
      transition: all 0.25s;
      box-shadow: 0 4px 12px rgba(255,94,19,0.3);
    }
    .nav-cta:hover {
      background: #e54d0a;
      transform: scale(1.03);
      box-shadow: 0 0 20px rgba(255,94,19,0.6);
      color: white !important;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
    }
    .hamburger span {
      width: 26px;
      height: 2px;
      background: white;
      border-radius: 2px;
      transition: 0.3s;
    }
    .mobile-menu {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      background: #0D0B1E;
      flex-direction: column;
      align-items: center;
      padding: 2rem;
      gap: 1.8rem;
      z-index: 999;
    }
    .mobile-menu a {
      color: white;
      font-size: 1.2rem;
      text-decoration: none;
      font-weight: 500;
    }
    /* 板块间距 */
    section {
      padding: 100px 0;
    }
    @media (max-width: 1023px) {
      section { padding: 70px 0; }
    }
    @media (max-width: 639px) {
      section { padding: 60px 0; }
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .mobile-menu.active { display: flex; }
    }
    /* hero */
    .hero-section {
      min-height: 90vh;
      background: var(--dark-bg);
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
    }
    .hero-title {
      font-size: 3.2rem;
      font-weight: 800;
      background: linear-gradient(to right, #7B2FF7, #00F0FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      line-height: 1.2;
      letter-spacing: -0.5px;
    }
    .hero-sub {
      color: #B0B0C0;
      font-size: 1.2rem;
      margin: 1.5rem 0 2rem;
    }
    .btn-group {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent);
      color: white;
      padding: 0.9rem 2.2rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      text-decoration: none;
      transition: all 0.25s;
      box-shadow: 0 4px 15px rgba(255,94,19,0.4);
      display: inline-block;
    }
    .btn-primary:hover {
      background: #e04d0a;
      transform: scale(1.04);
      box-shadow: 0 0 25px #FF5E13;
    }
    .btn-outline {
      border: 1.5px solid white;
      color: white;
      padding: 0.9rem 2.2rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      text-decoration: none;
      transition: 0.25s;
    }
    .btn-outline:hover {
      border-color: var(--highlight);
      color: var(--highlight);
      background: rgba(0,240,255,0.05);
    }
    .hero-image {
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 20px;
      height: 400px;
      box-shadow: 0 0 30px rgba(123,47,247,0.4);
      border: 1px solid rgba(0,240,255,0.3);
    }
    @media (max-width: 768px) {
      .hero-grid { grid-template-columns: 1fr; }
      .hero-title { font-size: 2.4rem; }
      .hero-image { height: 280px; }
    }
    /* 数据看板 */
    .data-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.8rem;
    }
    .stat-card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 2rem 1.5rem;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: 0.25s;
    }
    .stat-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border: 1px solid rgba(0,240,255,0.3);
    }
    .stat-number {
      font-size: 2.8rem;
      font-weight: 700;
      color: var(--highlight);
      letter-spacing: 1px;
    }
    .stat-label {
      color: var(--text-mid);
      margin-top: 0.5rem;
      font-size: 0.9rem;
    }
    @media (max-width: 768px) {
      .data-grid { grid-template-columns: 1fr 1fr; }
    }
    /* 核心优势非对称 */
    .advantage-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
    }
    .adv-card {
      background: white;
      padding: 2rem;
      border-radius: 20px;
      box-shadow: var(--shadow-sm);
    }
    .adv-card.large {
      grid-column: span 2;
      background: #F4F5F9;
    }
    @media (max-width: 768px) {
      .advantage-grid { grid-template-columns: 1fr; }
      .adv-card.large { grid-column: span 1; }
    }
    /* 服务体系 2x3 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .service-card {
      background: white;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 12px 24px rgba(0,0,0,0.1);
    }
    .service-img {
      height: 180px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .service-card:hover .service-img::after {
      content: '';
      position: absolute;
      inset: 0;
      background: rgba(123,47,247,0.25);
    }
    @media (max-width: 1023px) {
      .service-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 640px) {
      .service-grid { grid-template-columns: 1fr; }
    }
    /* 对比区 */
    .compare-container {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 2rem;
      flex-wrap: wrap;
    }
    .compare-box {
      flex: 1;
      min-width: 250px;
      background: white;
      border-radius: 24px;
      padding: 2rem;
    }
    .compare-box.dim {
      background: #e9e9ef;
      color: #5a5a72;
    }
    .compare-box.bright {
      border-left: 6px solid var(--highlight);
      background: white;
      box-shadow: 0 0 25px rgba(0,240,255,0.15);
    }
    .vs-circle {
      background: var(--highlight);
      color: black;
      font-weight: 800;
      width: 64px;
      height: 64px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 0 20px #00F0FF;
    }
    /* faq */
    .faq-item {
      border-bottom: 1px solid #ddd;
      padding: 1.2rem 0;
      cursor: pointer;
    }
    .faq-question {
      font-weight: 700;
      font-size: 1.2rem;
      display: flex;
      justify-content: space-between;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: 0.3s;
      background: #F8F8FC;
      margin-top: 0.8rem;
      padding: 0 1rem;
      border-radius: 8px;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 1rem;
    }
    .faq-item.active .faq-question { color: var(--primary); }
    /* cta form */
    .cta-section {
      background: var(--dark-bg);
    }
    .input-line {
      background: transparent;
      border: none;
      border-bottom: 2px solid #5A5A72;
      padding: 0.8rem 0.2rem;
      width: 100%;
      color: white;
      font-size: 1rem;
      outline: none;
      transition: 0.2s;
    }
    .input-line:focus {
      border-bottom-color: var(--highlight);
      box-shadow: 0 4px 8px rgba(0,240,255,0.2);
    }
    footer {
      background: #0A0818;
      color: #B0B0C0;
    }