/* roulang page: index */
:root {
      --primary: #0A6CFF;
      --primary-hover: #0856D4;
      --accent: #FF6B2B;
      --accent-hover: #E55A1F;
      --bg-light: #F7F9FC;
      --card-white: #FFFFFF;
      --text-dark: #1A1D28;
      --text-secondary: #5A5F6E;
      --text-footer: #9CA3AF;
      --footer-bg: #1A1D28;
      --border-light: rgba(0,0,0,0.05);
      --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
      --shadow-card-hover: 0 4px 12px rgba(10,108,255,0.08), 0 2px 4px rgba(0,0,0,0.06);
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-tag: 6px;
      --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
      --transition: 200ms ease-out;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      font-family: var(--font-sans);
      color: var(--text-dark);
      background: var(--bg-light);
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 32px;
    }
    /* 导航 */
    .header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 1000;
      background: transparent;
      transition: background var(--transition), box-shadow var(--transition);
      height: 64px;
      display: flex;
      align-items: center;
    }
    .header.scrolled {
      background: var(--card-white);
      box-shadow: 0 1px 8px rgba(0,0,0,0.04);
    }
    .header .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .logo {
      font-size: 22px;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 6px;
      letter-spacing: -0.3px;
    }
    .logo-icon {
      width: 24px;
      height: 24px;
      background: var(--primary);
      mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='currentColor'%3E%3Cpath d='M13 10V3L4 14h7v7l9-11h-7z'/%3E%3C/svg%3E");
      mask-size: contain;
      mask-repeat: no-repeat;
      -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='currentColor'%3E%3Cpath d='M13 10V3L4 14h7v7l9-11h-7z'/%3E%3C/svg%3E");
      -webkit-mask-size: contain;
      background: var(--primary);
      display: inline-block;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    .nav-links a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-dark);
      position: relative;
      padding: 6px 0;
      transition: color var(--transition);
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--primary);
      transition: width var(--transition);
    }
    .nav-links a:hover::after {
      width: 100%;
    }
    .nav-cta {
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      background: var(--primary);
      color: white !important;
      font-weight: 600;
      font-size: 14px;
      transition: background var(--transition), transform var(--transition);
    }
    .nav-cta:hover {
      background: var(--primary-hover);
      transform: scale(1.02);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--text-dark);
      transition: all 0.2s;
    }
    .mobile-menu {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: var(--bg-light);
      z-index: 999;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 28px;
      transform: translateY(-100%);
      transition: transform 0.3s ease;
    }
    .mobile-menu.active {
      transform: translateY(0);
    }
    .mobile-close {
      position: absolute;
      top: 20px;
      right: 24px;
      font-size: 32px;
      background: none;
      border: none;
      cursor: default;
    }
    /* Hero */
    .hero {
      padding: 120px 0 80px;
      background-color: var(--bg-light);
      position: relative;
      overflow: hidden;
    }
    .hero-bg-decor {
      position: absolute;
      top: -80px;
      right: -40px;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, rgba(10,108,255,0.06) 0%, transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }
    .hero .container {
      display: flex;
      align-items: center;
      gap: 48px;
    }
    .hero-left {
      flex: 0 0 55%;
    }
    .hero-left h1 {
      font-size: 34px;
      font-weight: 700;
      line-height: 1.3;
      letter-spacing: -0.5px;
      margin-bottom: 16px;
    }
    .highlight {
      color: var(--primary);
      position: relative;
      display: inline-block;
    }
    .highlight::after {
      content: '';
      position: absolute;
      bottom: 4px;
      left: 0;
      width: 100%;
      height: 6px;
      background: rgba(10,108,255,0.2);
      z-index: -1;
    }
    .hero-left p {
      font-size: 16px;
      color: var(--text-secondary);
      line-height: 1.6;
      margin-bottom: 32px;
      max-width: 480px;
    }
    .hero-actions {
      display: flex;
      align-items: center;
      gap: 20px;
      flex-wrap: wrap;
    }
    .btn-primary {
      padding: 14px 32px;
      background: var(--primary);
      color: white;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 15px;
      border: none;
      cursor: pointer;
      transition: background 0.2s, transform 0.2s;
      display: inline-block;
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      transform: scale(1.02);
    }
    .btn-secondary {
      padding: 14px 32px;
      background: transparent;
      color: var(--primary);
      border: 1.5px solid var(--primary);
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 15px;
      transition: background 0.2s;
    }
    .btn-secondary:hover {
      background: rgba(10,108,255,0.08);
    }
    .hero-right {
      flex: 0 0 40%;
      display: flex;
      justify-content: center;
    }
    .score-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      padding: 24px;
      width: 100%;
      max-width: 280px;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .match-title {
      font-weight: 600;
      font-size: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .live-dot {
      width: 8px;
      height: 8px;
      background: #10B981;
      border-radius: 50%;
      animation: pulse 1.5s infinite;
    }
    @keyframes pulse { 0%{opacity:1;} 50%{opacity:0.4;} 100%{opacity:1;} }
    .score-numbers {
      font-size: 32px;
      font-weight: 700;
      color: var(--accent);
      display: flex;
      justify-content: center;
      gap: 16px;
      letter-spacing: 0.5px;
    }
    /* 亮点网格 */
    .stats {
      padding: 60px 0;
    }
    .stats h2, .services h2, .comparison h2, .faq-section h2 {
      font-size: 24px;
      font-weight: 600;
      margin-bottom: 32px;
      text-align: center;
      color: var(--text-dark);
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .stat-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      padding: 28px 20px;
      text-align: center;
      box-shadow: var(--shadow-card);
      transition: all var(--transition);
    }
    .stat-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-2px);
    }
    .stat-number {
      font-size: 30px;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 8px;
    }
    .stat-label {
      font-size: 14px;
      color: var(--text-secondary);
    }
    /* 服务瀑布流 */
    .services {
      padding: 50px 0;
      background: var(--card-white);
      width: 100%;
    }
    .waterfall {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      overflow: hidden;
      transition: all var(--transition);
      display: flex;
      flex-direction: column;
      height: fit-content;
    }
    .service-card:nth-child(odd) {
      margin-top: 20px;
    }
    .service-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-4px);
    }
    .service-img {
      height: 160px;
      background-size: cover;
      background-position: center;
      transition: transform 0.2s;
    }
    .service-card:hover .service-img {
      transform: scale(1.03);
    }
    .service-content {
      padding: 20px 20px 16px;
    }
    .service-content h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .service-desc {
      font-size: 14px;
      color: var(--text-secondary);
      margin-bottom: 14px;
    }
    .tags {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }
    .tag {
      background: rgba(10,108,255,0.08);
      color: var(--primary);
      font-size: 12px;
      padding: 4px 12px;
      border-radius: 20px;
    }
    /* 对比表 */
    .comparison {
      padding: 70px 0;
      background: var(--bg-light);
    }
    .compare-cards {
      display: flex;
      gap: 24px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .compare-card {
      background: var(--card-white);
      border-radius: var(--radius-card);
      padding: 32px 24px;
      flex: 1 1 300px;
      max-width: 360px;
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
    }
    .compare-card.recommended {
      border: 1.5px solid var(--primary);
      position: relative;
    }
    .badge {
      position: absolute;
      top: -12px;
      right: 20px;
      background: var(--accent);
      color: white;
      padding: 4px 16px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 600;
    }
    .compare-card h3 {
      font-size: 20px;
      margin: 12px 0 20px;
      font-weight: 600;
    }
    .compare-list {
      list-style: none;
      margin-bottom: 28px;
      flex: 1;
    }
    .compare-list li {
      margin-bottom: 12px;
      font-size: 15px;
      color: var(--text-secondary);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .btn-outline {
      padding: 12px 20px;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      border-radius: var(--radius-btn);
      background: white;
      font-weight: 600;
      cursor: pointer;
      transition: 0.2s;
    }
    .btn-outline:hover {
      background: rgba(10,108,255,0.06);
    }
    .btn-accent {
      background: var(--accent);
      color: white;
      padding: 12px 20px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: none;
      transition: 0.2s;
      cursor: pointer;
    }
    .btn-accent:hover {
      background: var(--accent-hover);
    }
    /* FAQ */
    .faq-section {
      padding: 60px 0;
      background: var(--card-white);
    }
    .faq-list {
      max-width: 760px;
      margin: 0 auto;
    }
    .faq-item {
      background: #F0F2F5;
      border-radius: 8px;
      margin-bottom: 16px;
    }
    .faq-question {
      width: 100%;
      background: transparent;
      border: none;
      padding: 18px 20px;
      text-align: left;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-dark);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-answer {
      padding: 0 20px 20px;
      font-size: 15px;
      color: var(--text-secondary);
      display: none;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    /* CTA 横幅 */
    .cta-banner {
      background: #0F172A;
      color: white;
      padding: 80px 20px;
      text-align: center;
    }
    .cta-banner h2 {
      font-size: 28px;
      margin-bottom: 12px;
    }
    .cta-banner p {
      color: #CBD5E1;
      margin-bottom: 32px;
    }
    /* footer */
    .footer {
      background: var(--footer-bg);
      color: var(--text-footer);
      padding: 56px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
      gap: 40px;
    }
    .footer h4 {
      color: white;
      margin-bottom: 16px;
      font-weight: 600;
    }
    .footer a {
      color: var(--text-footer);
      font-size: 14px;
      margin-bottom: 10px;
      display: block;
    }
    .footer a:hover {
      color: white;
    }
    .copyright {
      border-top: 1px solid #2D323E;
      margin-top: 40px;
      padding-top: 20px;
      font-size: 14px;
      text-align: center;
    }
    @media (max-width: 1024px) {
      .hero .container {
        flex-direction: column;
      }
      .waterfall {
        grid-template-columns: repeat(2,1fr);
      }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .stats-grid { grid-template-columns: 1fr 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .waterfall { grid-template-columns: 1fr; }
      .service-card:nth-child(odd) { margin-top: 0; }
    }
    @media (max-width: 480px) {
      .container { padding: 0 20px; }
      .hero-left h1 { font-size: 28px; }
      .stats-grid { grid-template-columns: 1fr; }
    }