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

    :root {
      --primary: #1A1A1A;
      --accent: #D4AF37;
      --bg-page: #FAFAFA;
      --bg-card: #F5F5F5;
      --white: #FFFFFF;
      --text-main: #1A1A1A;
      --text-body: #4A4A4A;
      --text-muted: #8A8A8A;
      --border-light: #E8E8E8;
      --border-input: #D0D0D0;
      --radius-sm: 2px;
      --radius-md: 4px;
      --shadow-card: 0 1px 3px rgba(0,0,0,0.04);
      --shadow-hover: 0 8px 24px rgba(0,0,0,0.06);
      --transition-smooth: all 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

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

    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', '苹方', '雅黑', system-ui, -apple-system, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-body);
      line-height: 1.75;
      font-weight: 400;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    @media (max-width: 640px) {
      .container {
        padding: 0 16px;
      }
    }

    /* 导航栏 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      z-index: 50;
      height: 72px;
      background: transparent;
      transition: background 0.3s ease, backdrop-filter 0.3s ease, box-shadow 0.3s ease;
      display: flex;
      align-items: center;
    }

    .navbar.scrolled {
      background: rgba(255,255,255,0.88);
      backdrop-filter: blur(12px);
      box-shadow: 0 4px 20px rgba(0,0,0,0.02);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 8px;
      text-decoration: none;
      color: var(--primary);
    }

    .logo-icon {
      width: 36px;
      height: 36px;
      background: var(--primary);
      mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="white" stroke-width="2"><polygon points="12 2 22 8 18 20 6 20 2 8 12 2"/></svg>') center/contain no-repeat;
      background: var(--primary);
      display: inline-block;
    }

    .logo-text {
      font-weight: 700;
      font-size: 20px;
      letter-spacing: 0.05em;
      color: var(--primary);
      white-space: nowrap;
    }

    .nav-links {
      display: flex;
      gap: 28px;
      align-items: center;
    }

    .nav-link {
      font-size: 14px;
      font-weight: 500;
      color: #4A4A4A;
      text-decoration: none;
      position: relative;
      padding: 4px 0;
      transition: color 0.2s;
      white-space: nowrap;
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%) scaleX(0);
      width: 100%;
      height: 2px;
      background: var(--primary);
      transition: transform 0.25s ease;
    }

    .nav-link:hover {
      color: var(--primary);
    }

    .nav-link:hover::after {
      transform: translateX(-50%) scaleX(1);
    }

    .cta-group {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn-primary {
      background: var(--primary);
      color: white;
      font-weight: 600;
      font-size: 13px;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      border: none;
      cursor: pointer;
      transition: all 0.15s ease;
      text-decoration: none;
      display: inline-block;
      white-space: nowrap;
    }

    .btn-primary:hover {
      background: #2A2A2A;
      transform: scale(1.02);
      box-shadow: 0 0 0 3px rgba(26,26,26,0.1);
    }

    .status-badge {
      display: flex;
      align-items: center;
      gap: 6px;
      background: #e6f7e6;
      color: #0e6245;
      font-size: 11px;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 20px;
      white-space: nowrap;
      letter-spacing: 0.03em;
    }

    .breathing-dot {
      width: 8px;
      height: 8px;
      background: #27AE60;
      border-radius: 50%;
      animation: breathe 1.4s infinite ease-in-out;
    }

    @keyframes breathe {
      0% { opacity: 0.3; transform: scale(0.9); }
      50% { opacity: 1; transform: scale(1.2); }
      100% { opacity: 0.3; transform: scale(0.9); }
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: transparent;
      border: none;
      padding: 8px;
    }

    .hamburger span {
      width: 24px;
      height: 2px;
      background: var(--primary);
      transition: 0.3s;
    }

    .mobile-menu {
      position: fixed;
      top: 0;
      right: -100%;
      width: 80%;
      max-width: 320px;
      height: 100vh;
      background: white;
      box-shadow: -8px 0 30px rgba(0,0,0,0.05);
      padding: 24px;
      display: flex;
      flex-direction: column;
      transition: right 0.3s ease;
      z-index: 100;
    }

    .mobile-menu.open {
      right: 0;
    }

    .mobile-menu a {
      padding: 14px 0;
      border-bottom: 1px solid #f0f0f0;
      color: var(--text-main);
      font-weight: 500;
      text-decoration: none;
    }

    @media (max-width: 768px) {
      .nav-links, .cta-group .status-badge {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .cta-group .btn-primary {
        display: none;
      }
      .mobile-cta {
        display: block;
        margin-top: 20px;
      }
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      background: var(--bg-page);
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      padding-top: 72px;
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: rgba(250,250,250,0.75);
    }

    .hero-content {
      position: relative;
      display: flex;
      align-items: center;
      gap: 48px;
      width: 100%;
    }

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

    .hero-graphic {
      flex: 1 1 45%;
      height: 400px;
      background: rgba(212,175,55,0.08);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
    }

    .map-lines {
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at 30% 40%, rgba(212,175,55,0.2) 0%, transparent 70%);
      opacity: 0.5;
    }

    h1 {
      font-size: 48px;
      font-weight: 700;
      line-height: 1.15;
      letter-spacing: -0.02em;
      color: var(--primary);
      margin-bottom: 24px;
    }

    .hero-sub {
      font-size: 20px;
      color: var(--text-body);
      margin-bottom: 40px;
      max-width: 550px;
    }

    .hero-btns {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary);
      font-weight: 600;
      padding: 14px 32px;
      border-radius: var(--radius-sm);
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: 0.2s;
    }

    .btn-outline:hover {
      background: var(--primary);
      color: white;
    }

    .scroll-hint {
      position: absolute;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      animation: bounce 2s infinite;
      color: var(--text-muted);
    }

    @keyframes bounce {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-10px); }
    }

    @media (max-width: 768px) {
      .hero-content {
        flex-direction: column;
        text-align: center;
      }
      .hero-graphic {
        height: 250px;
        width: 100%;
      }
      h1 {
        font-size: 32px;
      }
    }

    /* 指标看板 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0;
      background: #f5f5f5;
      padding: 60px 0;
    }

    .metric-item {
      text-align: center;
      padding: 32px 16px;
      border-right: 1px solid #E0E0E0;
    }
    .metric-item:last-child {
      border-right: none;
    }
    .metric-number {
      font-size: 56px;
      font-weight: 700;
      color: var(--accent);
      letter-spacing: -0.03em;
    }
    .metric-unit {
      font-size: 20px;
      font-weight: 500;
      margin-left: 2px;
      color: var(--text-main);
    }
    .metric-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-top: 8px;
    }

    @media (max-width: 768px) {
      .metrics-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0;
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid #E0E0E0;
      }
    }

    /* 服务卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
      margin: 60px 0;
    }

    .service-card {
      background: var(--bg-card);
      padding: 32px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
      transition: var(--transition-smooth);
      position: relative;
      cursor: default;
    }
    .service-card.middle {
      padding-bottom: 52px;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-bottom: 3px solid var(--accent);
    }
    .card-icon {
      font-size: 32px;
      color: #4A4A4A;
      margin-bottom: 16px;
    }
    .service-card h3 {
      font-size: 22px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .card-link {
      margin-top: 16px;
      font-weight: 500;
      font-size: 14px;
      color: var(--primary);
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .card-link i {
      transition: transform 0.2s;
    }
    .card-link:hover i {
      transform: translateX(8px);
    }

    @media (max-width: 768px) {
      .services-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 640px) {
      .services-grid {
        grid-template-columns: 1fr;
      }
    }

    /* 对比表 */
    .compare-row {
      display: flex;
      gap: 48px;
      margin: 60px 0;
    }
    .compare-card {
      flex: 1;
      padding: 32px;
      border-radius: var(--radius-sm);
    }
    .compare-left {
      background: #F0F0F0;
      border: 1px dashed #CCCCCC;
    }
    .compare-right {
      background: white;
      border: 1.5px solid var(--accent);
      position: relative;
    }
    .badge-recommend {
      position: absolute;
      top: 16px;
      right: 16px;
      background: var(--accent);
      color: white;
      font-size: 11px;
      padding: 4px 12px;
      border-radius: 2px;
    }
    .compare-item {
      display: flex;
      align-items: center;
      gap: 12px;
      margin: 16px 0;
    }

    @media (max-width: 768px) {
      .compare-row {
        flex-direction: column;
      }
    }

    /* FAQ */
    .faq-item {
      border-bottom: 1px solid #EEEEEE;
      padding: 20px 0;
      cursor: pointer;
    }
    .faq-question {
      display: flex;
      align-items: center;
      gap: 16px;
      font-weight: 600;
      font-size: 18px;
    }
    .faq-line {
      width: 4px;
      height: 32px;
      background: #E0E0E0;
      transition: 0.3s;
    }
    .faq-item.active .faq-line {
      background: var(--accent);
      height: 48px;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding-left: 20px;
      color: #4A4A4A;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-top: 16px;
    }

    /* 表单 */
    .contact-form {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #f9f7f2;
      padding: 48px;
      border-radius: var(--radius-md);
    }
    .form-input {
      width: 100%;
      padding: 14px;
      border: 1px solid #D0D0D0;
      border-radius: var(--radius-sm);
      margin-bottom: 16px;
    }
    .btn-submit {
      background: var(--primary);
      color: white;
      width: 100%;
      padding: 16px;
      font-weight: 600;
      border: none;
      border-radius: var(--radius-sm);
      transition: 0.2s;
    }
    .btn-submit:hover {
      box-shadow: 0 0 0 3px rgba(26,26,26,0.1);
    }

    @media (max-width: 768px) {
      .contact-form {
        grid-template-columns: 1fr;
      }
    }

    footer {
      background: #1A1A1A;
      color: #B0B0B0;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }
    @media (max-width: 768px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }