/* roulang page: index */
:root {
      --primary: #0A174E;
      --secondary: #D4AF37;
      --gradient-start: #0A174E;
      --gradient-mid: #1C3A8C;
      --gradient-end: #D4AF37;
      --bg-light: #F8FAFC;
      --card-bg: #FFFFFF;
      --dark-bg: #060E2B;
      --text-heading: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --text-on-dark: #E2E8F0;
      --border-light: #E2E8F0;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-md: 0 12px 32px rgba(10,23,78,0.12);
      --radius-lg: 20px;
      --radius-md: 12px;
      --radius-btn: 12px;
      --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Inter", "Poppins", sans-serif;
      --font-number: "Inter", "Poppins", sans-serif;
      --transition: all 0.25s ease;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-sans);
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: var(--transition);
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      transition: background 0.3s ease, backdrop-filter 0.3s ease, box-shadow 0.3s ease;
      background: transparent;
      backdrop-filter: blur(0px);
    }
    .navbar.scrolled {
      background: rgba(6, 14, 43, 0.92);
      backdrop-filter: blur(12px);
      box-shadow: 0 4px 24px rgba(0,0,0,0.25);
      border-bottom: 1px solid rgba(212, 175, 55, 0.3);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo {
      font-weight: 700;
      font-size: 1.8rem;
      color: white;
      display: flex;
      align-items: center;
      gap: 8px;
      letter-spacing: 1px;
      text-shadow: 0 2px 8px rgba(0,0,0,0.4);
    }
    .logo i {
      color: var(--secondary);
      font-size: 2rem;
    }
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .nav-links a {
      color: rgba(255,255,255,0.85);
      font-weight: 500;
      font-size: 1rem;
      position: relative;
      padding: 4px 0;
      transition: color 0.2s;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--secondary);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--secondary);
      transition: width 0.2s;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      width: 100%;
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
      padding: 8px;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: white;
      transition: 0.3s;
      display: block;
    }
    .mobile-menu {
      position: fixed;
      top: 0;
      right: 0;
      width: 280px;
      height: 100vh;
      background: rgba(6,14,43,0.96);
      backdrop-filter: blur(20px);
      transform: translateX(100%);
      transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
      display: flex;
      flex-direction: column;
      padding: 80px 32px 40px;
      gap: 32px;
      z-index: 60;
    }
    .mobile-menu.open {
      transform: translateX(0);
    }
    .mobile-menu a {
      color: white;
      font-size: 1.3rem;
      font-weight: 500;
      border-bottom: 1px solid rgba(255,255,255,0.15);
      padding-bottom: 12px;
    }
    .close-menu {
      position: absolute;
      top: 24px;
      right: 24px;
      background: transparent;
      border: none;
      color: white;
      font-size: 2rem;
      cursor: pointer;
    }
    /* Hero */
    .hero {
      min-height: 100vh;
      background: radial-gradient(circle at 10% 20%, #0A174E, #060E2B);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-blend-mode: overlay;
      display: flex;
      align-items: center;
      position: relative;
      padding-top: 80px;
    }
    .hero-content {
      max-width: 700px;
      color: white;
      position: relative;
      z-index: 2;
    }
    .hero h1 {
      font-size: 3.2rem;
      font-weight: 700;
      line-height: 1.2;
      background: linear-gradient(to right, #ffffff, #D4AF37);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero .subtitle {
      font-size: 1.2rem;
      color: rgba(255,255,255,0.8);
      margin: 20px 0 32px;
    }
    .btn-group {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, #0A174E, #1C3A8C);
      border: 1px solid rgba(212,175,55,0.5);
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1rem;
      transition: all 0.3s;
      box-shadow: 0 8px 20px rgba(10,23,78,0.4);
      display: inline-block;
      text-align: center;
      cursor: pointer;
      background-size: 200% auto;
    }
    .btn-primary:hover {
      background-position: right center;
      box-shadow: 0 12px 28px rgba(212,175,55,0.25);
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.4);
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: 0.3s;
      backdrop-filter: blur(8px);
    }
    .btn-outline:hover {
      border-color: var(--secondary);
      color: var(--secondary);
      background: rgba(255,255,255,0.05);
    }
    .floating-badges {
      position: absolute;
      right: 60px;
      bottom: 80px;
      display: flex;
      gap: 24px;
      flex-direction: column;
    }
    .badge-float {
      background: rgba(255,255,255,0.08);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(212,175,55,0.35);
      border-radius: 100px;
      padding: 12px 24px;
      color: white;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 8px;
      animation: float 3s infinite alternate;
    }
    @keyframes float {
      0% { transform: translateY(0); }
      100% { transform: translateY(-6px); }
    }
    /* 板块通用 */
    section {
      padding: 80px 0;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 16px;
    }
    /* 数据看板 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4,1fr);
      gap: 24px;
    }
    .stat-card {
      background: white;
      border-radius: var(--radius-lg);
      padding: 32px 20px;
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
    }
    .stat-number {
      font-family: var(--font-number);
      font-size: 2.8rem;
      font-weight: 700;
      background: linear-gradient(to right, #0A174E, #1C3A8C);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    /* 服务卡 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3,1fr);
      gap: 28px;
    }
    .feature-card {
      background: white;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: 0.3s;
    }
    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border: 1px solid rgba(212,175,55,0.3);
    }
    .feature-img {
      height: 200px;
      background-size: cover;
      background-position: center;
      position: relative;
    }
    .feature-badge {
      position: absolute;
      top: 16px;
      left: 16px;
      background: var(--secondary);
      width: 40px;
      height: 40px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #0A174E;
      font-weight: bold;
    }
    /* 对比 */
    .comparison-row {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    .vs-badge {
      font-size: 2rem;
      font-weight: 800;
      color: var(--secondary);
    }
    /* FAQ */
    .faq-item {
      border: 1px solid var(--border-light);
      border-radius: 12px;
      margin-bottom: 16px;
      background: white;
    }
    .faq-question {
      padding: 20px;
      display: flex;
      justify-content: space-between;
      font-weight: 600;
      cursor: pointer;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
      padding: 0 20px;
      color: #475569;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 20px;
    }
    .contact-card {
      background: linear-gradient(135deg, #f0f4ff, #ffffff);
      border-radius: 28px;
      padding: 48px;
    }
    footer {
      background: #060E2B;
      color: #CBD5E1;
      padding: 60px 0 30px;
    }
    @media (max-width: 1024px) {
      .stats-grid { grid-template-columns: repeat(2,1fr); }
      .features-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .hero h1 { font-size: 2.2rem; }
      .floating-badges { display: none; }
      .comparison-row { flex-direction: column; }
      .stats-grid { grid-template-columns: 1fr; }
    }