/* roulang page: index */
:root {
      --bg-main: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark: #0B0F19;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-light: #94A3B8;
      --primary: #1E3A8A;
      --primary-accent: #2563EB;
      --accent-green: #10B981;
      --accent-purple: #7C3AED;
      --accent-orange: #F59E0B;
      --border-light: #E2E8F0;
      --border-dark: rgba(255, 255, 255, 0.08);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-subtle: 0 10px 30px -10px rgba(0, 0, 0, 0.05);
      --shadow-hover: 0 16px 36px -12px rgba(37, 99, 235, 0.12);
      --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: var(--font-stack);
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    /* 顶部导航 */
    .top-bar {
      background-color: #050811;
      color: #94A3B8;
      font-size: 0.75rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding: 6px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #38BDF8;
    }
    .status-dot {
      width: 7px;
      height: 7px;
      background-color: var(--accent-green);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent-green);
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.02em;
    }
    .brand-symbol {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--primary), var(--primary-accent));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFF;
      font-weight: 800;
      font-size: 1rem;
    }
    .nav-menu {
      display: flex;
      gap: 28px;
      list-style: none;
    }
    .nav-link {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-muted);
      transition: color 0.2s ease;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-accent);
    }
    .btn-cta {
      background-color: var(--primary);
      color: #FFF;
      padding: 10px 22px;
      font-size: 0.875rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid var(--primary);
      transition: all 0.25s ease;
      display: inline-block;
      cursor: pointer;
    }
    .btn-cta:hover {
      background-color: var(--primary-accent);
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
    }
    .btn-outline {
      background-color: transparent;
      color: var(--primary);
      padding: 10px 22px;
      font-size: 0.875rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
      transition: all 0.2s ease;
      display: inline-block;
    }
    .btn-outline:hover {
      border-color: var(--primary-accent);
      color: var(--primary-accent);
      background-color: #EFF6FF;
    }

    /* 板块通用 */
    .section-block {
      padding: 88px 0;
      position: relative;
    }
    .section-block.bg-white {
      background-color: #FFFFFF;
    }
    .section-block.bg-slate {
      background-color: #F8FAFC;
    }
    .section-block.bg-dark {
      background-color: var(--bg-dark);
      color: #FFFFFF;
    }
    .section-header {
      margin-bottom: 56px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--primary-accent);
      background-color: #DBEAFE;
      padding: 4px 12px;
      border-radius: 9999px;
      margin-bottom: 14px;
    }
    .section-tag.dark-tag {
      background-color: rgba(37, 99, 235, 0.15);
      color: #60A5FA;
      border: 1px solid rgba(96, 165, 250, 0.3);
    }
    .section-title {
      font-size: 2.125rem;
      line-height: 1.25;
      font-weight: 800;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 1rem;
      line-height: 1.7;
      color: var(--text-muted);
    }
    .bg-dark .section-desc {
      color: var(--text-light);
    }

    /* Hero：提问式获客 + 右侧预约 */
    .hero-section {
      padding: 70px 0 90px;
      background: radial-gradient(circle at 10% 20%, #EEF2FF 0%, #F8FAFC 70%);
      border-bottom: 1px solid var(--border-light);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 2.85rem;
      line-height: 1.15;
      font-weight: 900;
      letter-spacing: -0.03em;
      color: var(--text-main);
      margin-bottom: 22px;
    }
    .hero-h1 span {
      background: linear-gradient(135deg, var(--primary), var(--accent-purple));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      font-size: 1.0625rem;
      line-height: 1.75;
      color: var(--text-muted);
      margin-bottom: 30px;
    }
    .hero-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 32px;
    }
    .hero-badge-pill {
      font-size: 0.8125rem;
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      background-color: #FFFFFF;
      border: 1px solid var(--border-light);
      color: var(--text-main);
      font-weight: 500;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .hero-form-panel {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      box-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.08);
    }
    .hero-form-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .hero-form-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 20px;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      font-size: 0.8125rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-input {
      width: 100%;
      height: 44px;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      padding: 0 14px;
      font-size: 0.875rem;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s ease;
      background: #F8FAFC;
    }
    .form-input:focus {
      border-color: var(--primary-accent);
      background: #FFFFFF;
    }
    .btn-submit {
      width: 100%;
      height: 46px;
      background-color: var(--primary-accent);
      color: #FFFFFF;
      font-weight: 600;
      font-size: 0.9375rem;
      border-radius: var(--radius-sm);
      border: none;
      cursor: pointer;
      transition: background-color 0.2s;
    }
    .btn-submit:hover {
      background-color: var(--primary);
    }
    .form-promise {
      margin-top: 12px;
      font-size: 0.75rem;
      color: var(--text-light);
      text-align: center;
    }

    /* 网格与卡片 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 36px;
      align-items: center;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: all 0.25s ease-out;
      box-shadow: var(--shadow-subtle);
    }
    .feature-card:hover {
      transform: translateY(-4px);
      border-color: rgba(37, 99, 235, 0.4);
      box-shadow: var(--shadow-hover);
    }
    .card-icon {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background-color: #EFF6FF;
      color: var(--primary-accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .feature-h3 {
      font-size: 1.1875rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .feature-p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 方案卡片与主推高亮 */
    .plan-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      position: relative;
      display: flex;
      flex-direction: column;
      transition: all 0.25s ease;
    }
    .plan-card.featured {
      border: 2px solid var(--primary-accent);
      box-shadow: 0 16px 40px -10px rgba(37, 99, 235, 0.15);
      background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
    }
    .plan-badge {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--primary-accent);
      color: #FFFFFF;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 9999px;
    }
    .plan-title {
      font-size: 1.35rem;
      font-weight: 800;
      margin-bottom: 10px;
    }
    .plan-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 24px;
    }
    .plan-list {
      list-style: none;
      margin-bottom: 30px;
      flex-grow: 1;
    }
    .plan-list li {
      font-size: 0.875rem;
      color: var(--text-main);
      padding: 8px 0;
      display: flex;
      align-items: center;
      gap: 10px;
      border-bottom: 1px dashed var(--border-light);
    }
    .plan-check {
      color: var(--accent-green);
      font-weight: bold;
    }

    /* 深色对比度大屏理念区 */
    .code-console {
      background: #050811;
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      font-family: "Roboto Mono", Consolas, monospace;
      font-size: 0.8125rem;
      color: #38BDF8;
      box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    }
    .code-line {
      display: flex;
      gap: 12px;
      line-height: 1.8;
    }
    .code-num {
      color: #475569;
      user-select: none;
    }
    .code-hl {
      color: var(--accent-green);
    }
    .code-warn {
      color: var(--accent-orange);
    }

    /* 故事区交错图文 */
    .story-img-wrap {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-subtle);
    }

    /* 指标统计条 */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      border-top: 1px solid var(--border-light);
      border-bottom: 1px solid var(--border-light);
      background: #FFFFFF;
    }
    .metric-item {
      padding: 40px 24px;
      text-align: center;
      border-right: 1px solid var(--border-light);
    }
    .metric-item:last-child {
      border-right: none;
    }
    .metric-number {
      font-size: 3rem;
      font-weight: 900;
      letter-spacing: -0.03em;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 10px;
    }
    .metric-label {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .metric-sub {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    /* 手风琴 Accordion */
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
    }
    .faq-question {
      padding: 20px 24px;
      font-weight: 700;
      font-size: 1rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #FFFFFF;
    }
    .faq-answer {
      padding: 0 24px 20px;
      font-size: 0.905rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 资讯摘要卡 */
    .insight-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: transform 0.2s ease;
    }
    .insight-card:hover {
      transform: translateY(-4px);
    }
    .insight-body {
      padding: 24px;
    }
    .insight-meta {
      font-size: 0.75rem;
      color: var(--text-light);
      margin-bottom: 8px;
    }
    .insight-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .insight-summary {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 合作背书 Logo 栏 */
    .partner-grid {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 24px;
      opacity: 0.75;
    }
    .partner-item {
      font-size: 1.05rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    /* 页脚 */
    .site-footer {
      background-color: #050811;
      color: #94A3B8;
      padding: 72px 0 36px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.875rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 48px;
      margin-bottom: 56px;
    }
    .footer-brand {
      color: #FFFFFF;
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 14px;
    }
    .footer-heading {
      color: #FFFFFF;
      font-size: 0.9375rem;
      font-weight: 600;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      padding-top: 28px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.75rem;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-item:nth-child(2) {
        border-right: none;
      }
      .metric-item:nth-child(1), .metric-item:nth-child(2) {
        border-bottom: 1px solid var(--border-light);
      }
    }
    @media (max-width: 768px) {
      .nav-menu {
        display: none;
      }
      .grid-3, .grid-2, .grid-4 {
        grid-template-columns: 1fr;
      }
      .metrics-bar {
        grid-template-columns: 1fr;
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid var(--border-light);
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 2.15rem;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }