/* roulang page: index */
:root {
      --deep-blackblue: #0A0E27;
      --electric-orange: #FF6B35;
      --cool-white: #F0F4FF;
      --card-bg: rgba(16, 24, 48, 0.7);
      --card-border: rgba(255, 107, 53, 0.15);
      --glow-orange: 0 0 30px rgba(255, 107, 53, 0.5);
      --glass-blur: blur(20px);
      --radius-lg: 16px;
      --radius-pill: 50px;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      --transition-smooth: all 0.25s ease;
    }

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

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

    body {
      font-family: var(--font-sans);
      background-color: var(--deep-blackblue);
      color: var(--cool-white);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

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

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

    button, input, textarea {
      font-family: inherit;
    }

    /* 导航 */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: rgba(10, 14, 39, 0.88);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255, 107, 53, 0.25);
      transition: var(--transition-smooth);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo {
      display: flex;
      align-items: baseline;
      gap: 6px;
      font-weight: 700;
      font-size: 1.5rem;
      letter-spacing: -0.3px;
      color: white;
    }
    .logo .brand {
      color: var(--electric-orange);
    }
    .logo .domain {
      font-size: 0.7rem;
      font-weight: 400;
      opacity: 0.7;
      margin-left: 4px;
    }

    .nav-menu {
      display: flex;
      gap: 2rem;
      font-weight: 500;
    }
    .nav-menu a {
      padding: 0.25rem 0;
      border-bottom: 2px solid transparent;
      transition: var(--transition-smooth);
    }
    .nav-menu a:hover,
    .nav-menu a.active {
      color: var(--electric-orange);
      border-bottom-color: var(--electric-orange);
    }

    .header-cta {
      background: var(--electric-orange);
      color: white;
      padding: 0.6rem 1.8rem;
      border-radius: var(--radius-pill);
      font-weight: 600;
      font-size: 0.9rem;
      box-shadow: 0 4px 14px rgba(255, 107, 53, 0.4);
      transition: var(--transition-smooth);
      border: none;
      cursor: pointer;
    }
    .header-cta:hover {
      background: #ff7f4f;
      box-shadow: 0 6px 22px rgba(255, 107, 53, 0.65);
      transform: translateY(-1px);
    }

    .hamburger {
      display: none;
      background: none;
      border: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }
    .hamburger span {
      width: 26px;
      height: 2px;
      background: var(--cool-white);
      transition: var(--transition-smooth);
    }

    /* 移动端导航面板 */
    .mobile-panel {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100vh;
      background: rgba(10, 14, 39, 0.96);
      backdrop-filter: blur(25px);
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 2rem;
      z-index: 999;
    }
    .mobile-panel a {
      font-size: 1.4rem;
      font-weight: 600;
      color: var(--cool-white);
    }
    .mobile-panel .mobile-cta {
      margin-top: 1.5rem;
      background: var(--electric-orange);
      padding: 0.8rem 2.5rem;
      border-radius: var(--radius-pill);
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: radial-gradient(circle at 30% 40%, #1a1f3a 0%, #0A0E27 75%);
      position: relative;
      overflow: hidden;
      padding-top: 80px;
    }
    .hero::before {
      content: "";
      position: absolute;
      width: 100%;
      height: 100%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: 0.18;
      filter: blur(1px);
      z-index: 0;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
      align-items: center;
      width: 100%;
    }
    .hero-left {
      display: flex;
      flex-direction: column;
      gap: 1.8rem;
    }
    h1 {
      font-size: 3rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      line-height: 1.2;
      color: white;
    }
    .hero-sub {
      font-size: 1.2rem;
      color: rgba(240, 244, 255, 0.8);
      max-width: 480px;
    }
    .hero-buttons {
      display: flex;
      gap: 1.2rem;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--electric-orange);
      color: white;
      padding: 0.85rem 2.2rem;
      border-radius: var(--radius-pill);
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: var(--transition-smooth);
      box-shadow: 0 4px 18px rgba(255,107,53,0.45);
    }
    .btn-primary:hover {
      background: #ff7f4f;
      box-shadow: 0 0 24px rgba(255,107,53,0.7);
    }
    .btn-secondary {
      background: transparent;
      border: 1px solid var(--cool-white);
      color: var(--cool-white);
      padding: 0.85rem 2.2rem;
      border-radius: var(--radius-pill);
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition-smooth);
    }
    .btn-secondary:hover {
      border-color: var(--electric-orange);
      background: rgba(255,107,53,0.1);
    }
    .hero-metrics {
      display: flex;
      gap: 1.5rem;
      flex-wrap: wrap;
    }
    .metric-card {
      background: var(--card-bg);
      backdrop-filter: var(--glass-blur);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-lg);
      padding: 1rem 1.4rem;
      text-align: center;
      box-shadow: var(--shadow-card);
    }
    .metric-number {
      font-size: 2rem;
      font-weight: 800;
      color: var(--electric-orange);
      text-shadow: 0 0 12px rgba(255,107,53,0.6);
    }

    /* 板块通用 */
    section {
      padding: 100px 0;
    }
    h2 {
      font-size: 2.25rem;
      font-weight: 700;
      margin-bottom: 2.5rem;
      text-align: center;
    }

    /* 数据看板 */
    .dashboard-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .data-card {
      background: var(--card-bg);
      backdrop-filter: var(--glass-blur);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-lg);
      padding: 2rem 1.5rem;
      text-align: center;
      transition: var(--transition-smooth);
    }
    .data-card:hover {
      border-color: rgba(255,107,53,0.5);
      box-shadow: 0 0 30px rgba(255,107,53,0.25);
    }
    .big-number {
      font-size: 3.5rem;
      font-weight: 800;
      color: var(--electric-orange);
    }

    /* 服务矩阵 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .service-card {
      background: var(--card-bg);
      backdrop-filter: var(--glass-blur);
      border: 1px solid var(--card-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: var(--transition-smooth);
    }
    .service-card:hover {
      transform: translateY(-6px);
      border-color: rgba(255,107,53,0.45);
      box-shadow: 0 16px 40px rgba(0,0,0,0.6);
    }
    .service-img {
      height: 180px;
      background-size: cover;
      background-position: center;
    }
    .service-text {
      padding: 1.8rem;
    }

    /* 对比 */
    .compare-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
    }
    .compare-card {
      padding: 2.2rem;
      border-radius: var(--radius-lg);
      background: rgba(16,24,48,0.5);
      backdrop-filter: blur(16px);
    }
    .compare-traditional {
      border: 1px solid rgba(255,255,255,0.08);
      opacity: 0.9;
    }
    .compare-yamei {
      border: 1px solid var(--electric-orange);
      box-shadow: 0 0 28px rgba(255,107,53,0.35);
    }

    /* 案例 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: var(--card-bg);
      backdrop-filter: var(--glass-blur);
      border-radius: var(--radius-lg);
      overflow: hidden;
    }

    /* FAQ */
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .faq-item {
      background: rgba(16,24,48,0.45);
      backdrop-filter: blur(12px);
      border-left: 4px solid var(--electric-orange);
      padding: 1.2rem 1.5rem;
      border-radius: 12px;
      cursor: pointer;
    }

    /* CTA 表单 */
    .cta-section {
      background: #0A0E27;
    }
    .form-row {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      justify-content: center;
    }
    .form-input {
      background: #141a33;
      border: 1px solid rgba(240,244,255,0.2);
      padding: 0.9rem 1.2rem;
      border-radius: 40px;
      color: white;
      width: 240px;
    }
    .form-input:focus {
      border-color: var(--electric-orange);
      box-shadow: 0 0 12px rgba(255,107,53,0.5);
      outline: none;
    }

    /* 页脚 */
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 2rem;
      padding: 3rem 0;
    }
    @media (max-width: 1024px) {
      .hero-content { grid-template-columns: 1fr; }
      .dashboard-grid { grid-template-columns: repeat(2,1fr); }
      .service-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .nav-menu, .header-cta { display: none; }
      .hamburger { display: flex; }
      .service-grid, .case-grid, .faq-grid { grid-template-columns: 1fr; }
      .compare-row { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      h1 { font-size: 2.2rem; }
    }