/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');

    :root {
      --deep-blue: #0A1F3F;
      --energy-orange: #FF6A3D;
      --hover-orange: #E55A2B;
      --light-gray-bg: #F4F7FC;
      --slate-gray: #5C6B7E;
      --success-green: #10B981;
      --white: #FFFFFF;
      --card-shadow: 0 4px 20px rgba(10, 31, 63, 0.06);
      --card-shadow-hover: 0 12px 28px rgba(10, 31, 63, 0.12);
      --border-radius-card: 12px;
      --border-radius-btn: 8px;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Inter', system-ui, sans-serif;
      --font-mono: 'SF Mono', 'Inter', monospace;
    }

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

    body {
      font-family: var(--font-sans);
      background-color: var(--light-gray-bg);
      color: #1E293B;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 64px;
      background: rgba(10, 31, 63, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      z-index: 50;
      display: flex;
      align-items: center;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .logo a {
      font-size: 1.5rem;
      font-weight: 700;
      color: white;
      text-decoration: none;
      letter-spacing: -0.3px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .logo i {
      color: var(--energy-orange);
      font-size: 1.8rem;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 2rem;
    }

    .nav-links a {
      color: rgba(255,255,255,0.85);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: color 0.2s;
      position: relative;
      padding-bottom: 6px;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--energy-orange);
      transition: width 0.2s ease;
    }

    .nav-links a:hover {
      color: white;
    }

    .nav-links a.active::after,
    .nav-links a:hover::after {
      width: 100%;
    }

    .nav-cta {
      background: var(--energy-orange);
      color: white;
      padding: 0.6rem 1.5rem;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      font-size: 0.9rem;
      transition: background 0.2s, transform 0.1s;
      text-decoration: none;
      display: inline-block;
    }

    .nav-cta:hover {
      background: var(--hover-orange);
      transform: translateY(-1px);
    }

    .menu-toggle {
      display: none;
      background: transparent;
      border: none;
      color: white;
      font-size: 1.6rem;
      cursor: pointer;
    }

    /* 移动端菜单 */
    .mobile-menu {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: rgba(10, 31, 63, 0.96);
      backdrop-filter: blur(20px);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 2.5rem;
      z-index: 60;
      transform: translateX(100%);
      transition: transform 0.3s ease;
    }

    .mobile-menu.open {
      transform: translateX(0);
    }

    .mobile-menu a {
      color: white;
      font-size: 1.8rem;
      font-weight: 500;
      text-decoration: none;
      border-bottom: 2px solid transparent;
      transition: border-color 0.2s;
    }

    .mobile-menu a:hover {
      border-color: var(--energy-orange);
    }

    .close-menu {
      position: absolute;
      top: 20px;
      right: 24px;
      background: transparent;
      border: none;
      color: white;
      font-size: 2rem;
      cursor: pointer;
    }

    /* Hero */
    .hero-section {
      padding: 140px 0 100px;
      background: linear-gradient(135deg, #0A1F3F 0%, #132B4F 100%);
      color: white;
    }

    .hero-grid {
      display: flex;
      align-items: center;
      gap: 3rem;
    }

    .hero-text {
      flex: 1 1 55%;
    }

    .hero-text h1 {
      font-size: 3rem;
      font-weight: 700;
      line-height: 1.3;
      letter-spacing: -0.5px;
      margin-bottom: 1.5rem;
    }

    .hero-text p {
      color: #CBD5E1;
      font-size: 1.1rem;
      margin-bottom: 2.2rem;
    }

    .hero-buttons {
      display: flex;
      gap: 1rem;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: var(--energy-orange);
      color: white;
      padding: 0.9rem 2.2rem;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      text-decoration: none;
      transition: background 0.2s, transform 0.1s;
      display: inline-block;
    }

    .btn-primary:hover {
      background: var(--hover-orange);
      transform: scale(0.98);
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid white;
      color: white;
      padding: 0.9rem 2.2rem;
      border-radius: var(--border-radius-btn);
      font-weight: 600;
      text-decoration: none;
      transition: background 0.2s, color 0.2s;
    }

    .btn-outline:hover {
      background: rgba(255,255,255,0.1);
    }

    .hero-image {
      flex: 1 1 45%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: 16px;
      height: 360px;
      box-shadow: 0 20px 35px rgba(0,0,0,0.3);
      border: 1px solid rgba(255,255,255,0.15);
    }

    /* 板块通用 */
    .section {
      padding: 100px 0;
    }

    .section-title {
      font-size: 2.25rem;
      font-weight: 600;
      color: var(--deep-blue);
      margin-bottom: 0.75rem;
      letter-spacing: -0.3px;
    }

    .section-sub {
      color: var(--slate-gray);
      font-size: 1.1rem;
      margin-bottom: 3rem;
    }

    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: white;
      padding: 2rem 1.8rem;
      border-radius: var(--border-radius-card);
      box-shadow: var(--card-shadow);
      transition: all 0.3s ease;
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--card-shadow-hover);
    }

    .service-icon {
      font-size: 2.2rem;
      color: var(--energy-orange);
      margin-bottom: 1.3rem;
    }

    .service-card h3 {
      font-size: 1.35rem;
      font-weight: 600;
      margin-bottom: 0.8rem;
    }

    /* 优势数据 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .stat-number {
      font-size: 3.2rem;
      font-weight: 700;
      color: var(--energy-orange);
      font-family: var(--font-mono);
    }

    /* 案例卡片 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: white;
      border-radius: var(--border-radius-card);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      transition: 0.3s;
    }

    .case-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--card-shadow-hover);
    }

    .case-img {
      height: 180px;
      background-size: cover;
      background-position: center;
    }

    .case-content {
      padding: 1.4rem;
    }

    .tag {
      display: inline-block;
      background: #E6F0FF;
      color: var(--deep-blue);
      font-size: 0.8rem;
      padding: 0.2rem 0.8rem;
      border-radius: 20px;
      font-weight: 500;
      margin-bottom: 0.6rem;
    }

    /* 解决方案图文 */
    .solution-row {
      display: flex;
      align-items: center;
      gap: 3rem;
      margin-bottom: 4rem;
    }

    .solution-row.reverse {
      flex-direction: row-reverse;
    }

    .solution-text {
      flex: 1;
    }

    .solution-img {
      flex: 1;
      height: 280px;
      background-size: cover;
      background-position: center;
      border-radius: 16px;
    }

    /* FAQ */
    .faq-item {
      background: white;
      border-radius: 12px;
      margin-bottom: 12px;
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
      overflow: hidden;
    }

    .faq-question {
      padding: 1.4rem 1.8rem;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      background: white;
    }

    .faq-answer {
      padding: 0 1.8rem 1.4rem;
      color: var(--slate-gray);
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }

    /* CTA区块 */
    .cta-block {
      background: var(--deep-blue);
      color: white;
      text-align: center;
      padding: 80px 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 2rem;
    }

    @media (max-width: 1024px) {
      .services-grid, .cases-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .hero-grid {
        flex-direction: column;
      }
      .hero-image {
        height: 250px;
        width: 100%;
      }
      .services-grid, .cases-grid {
        grid-template-columns: 1fr;
      }
      .solution-row, .solution-row.reverse {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }