/* roulang page: index */
:root {
      --bg-main: #FFFFFF;
      --bg-sub: #F4F6F9;
      --bg-dark: #0D1117;
      --bg-card: #FFFFFF;
      --text-main: #1F2937;
      --text-muted: #4B5563;
      --text-light: #9CA3AF;
      --primary: #00D084;
      --primary-dark: #00A868;
      --accent: #00A8FF;
      --amber: #FF9F1C;
      --border: #E5E7EB;
      --border-dark: #21262D;
      --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
      --shadow-lg: 0 16px 36px rgba(0,0,0,0.1);
      --max-width: 1280px;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-main);
      line-height: 1.8;
      letter-spacing: 0.02em;
      -webkit-font-smoothing: antialiased;
    }

    a { text-decoration: none; color: inherit; transition: color 0.2s; }
    img { max-width: 100%; height: auto; display: block; }
    button, input, select, textarea { font-family: inherit; }

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部双行导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border);
    }
    .top-bar {
      background-color: var(--bg-dark);
      color: #9CA3AF;
      font-size: 12px;
      padding: 6px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #D1D5DB;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--primary);
    }
    .top-links {
      display: flex;
      gap: 20px;
    }

    .main-nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 20px;
      color: var(--text-main);
    }
    .brand-logo .logo-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 900;
      font-size: 16px;
    }
    .nav-links {
      display: flex;
      list-style: none;
      gap: 24px;
      font-size: 15px;
      font-weight: 500;
    }
    .nav-links a:hover { color: var(--accent); }
    .nav-cta-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #FFFFFF;
      font-weight: 600;
      font-size: 14px;
      border-radius: var(--radius-sm);
      box-shadow: 0 4px 14px rgba(0, 208, 132, 0.3);
      border: none;
      cursor: pointer;
      transition: opacity 0.2s, transform 0.2s;
    }
    .nav-cta-btn:hover { opacity: 0.95; transform: translateY(-1px); }

    /* 板块通用 */
    .section-padding { padding: 90px 0; }
    .bg-alt { background-color: var(--bg-sub); }
    .bg-dark-block { background-color: var(--bg-dark); color: #F3F4F6; }
    
    .section-header {
      margin-bottom: 54px;
      max-width: 820px;
    }
    .section-tag {
      font-size: 12px;
      font-weight: 700;
      color: var(--accent);
      letter-spacing: 0.08em;
      text-transform: uppercase;
      margin-bottom: 8px;
      display: inline-block;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.35;
      margin-bottom: 14px;
      color: inherit;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
    }
    .bg-dark-block .section-desc { color: #9CA3AF; }

    /* 板块1：Hero 预约到店 / 方案研判 */
    .hero-section {
      background: linear-gradient(rgba(13, 17, 23, 0.88), rgba(13, 17, 23, 0.92)), url('/assets/images/8a467ad37711985b.jpg') center/cover no-repeat;
      color: #FFFFFF;
      padding: 100px 0 110px;
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      background: linear-gradient(180deg, #FFFFFF 30%, #D1D5DB 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-p {
      font-size: 16px;
      color: #D1D5DB;
      line-height: 1.85;
      margin-bottom: 32px;
    }
    .hero-highlights {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-bottom: 36px;
    }
    .hero-feat-item {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-sm);
      padding: 14px 18px;
      font-size: 14px;
      color: #F3F4F6;
    }
    .hero-feat-item strong { color: var(--primary); display: block; font-size: 16px; margin-bottom: 4px; }
    
    .hero-booking-card {
      background: rgba(255, 255, 255, 0.08);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.18);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    }
    .booking-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #FFFFFF;
    }
    .booking-subtitle {
      font-size: 13px;
      color: #9CA3AF;
      margin-bottom: 22px;
      display: block;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      font-size: 13px;
      margin-bottom: 6px;
      color: #E5E7EB;
    }
    .form-input, .form-select {
      width: 100%;
      padding: 12px 14px;
      background: rgba(13, 17, 23, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: var(--radius-sm);
      color: #FFFFFF;
      font-size: 14px;
      outline: none;
    }
    .form-input:focus, .form-select:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 2px rgba(0, 168, 255, 0.2);
    }
    .btn-submit {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #FFFFFF;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      font-size: 15px;
      transition: all 0.2s;
      margin-top: 8px;
    }
    .btn-submit:hover { opacity: 0.92; box-shadow: 0 6px 18px rgba(0, 208, 132, 0.4); }

    /* 板块2：痛点解析 */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .pain-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .pain-index {
      font-family: var(--font-mono);
      font-size: 13px;
      font-weight: 700;
      color: var(--amber);
      margin-bottom: 12px;
      display: inline-block;
      padding: 2px 8px;
      background: #FFF7ED;
      border-radius: var(--radius-sm);
    }
    .pain-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .pain-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.75;
    }

    /* 板块3：解决方案 */
    .solution-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .solution-img-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border);
    }
    .solution-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .solution-item {
      padding: 20px;
      border-left: 4px solid var(--primary);
      background: #FFFFFF;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      box-shadow: var(--shadow-sm);
    }
    .solution-item h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .solution-item p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块4：核心技术矩阵 */
    .tech-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .tech-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .tech-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent);
    }
    .tech-metric {
      font-family: var(--font-mono);
      font-size: 24px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .tech-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .tech-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块5：场景演示 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }
    .scenario-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .scenario-card-img {
      height: 220px;
      width: 100%;
      object-fit: cover;
    }
    .scenario-card-body {
      padding: 26px;
    }
    .scenario-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 600;
      color: var(--accent);
      background: #EFF6FF;
      padding: 3px 10px;
      border-radius: var(--radius-sm);
      margin-bottom: 10px;
    }
    .scenario-title {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .scenario-p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.75;
    }

    /* 板块6：深色战术推演沙盘 */
    .tactics-board {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 36px;
      align-items: center;
      background: #161B22;
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 40px;
    }
    .tactics-stats {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-top: 24px;
    }
    .stat-pill {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-sm);
      padding: 16px;
    }
    .stat-val {
      font-family: var(--font-mono);
      font-size: 22px;
      font-weight: 800;
      color: var(--primary);
    }
    .stat-lbl {
      font-size: 13px;
      color: #9CA3AF;
      margin-top: 4px;
    }

    /* 板块7：社会认同与行业背书 */
    .social-proof-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .proof-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
    }
    .proof-num {
      font-family: var(--font-mono);
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .proof-title {
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 4px;
    }
    .proof-desc {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 板块8：案例深读卡 */
    .case-story-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .case-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      background: #ECFDF5;
      color: var(--primary-dark);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
    }
    .case-headline {
      font-size: 24px;
      font-weight: 800;
      margin-bottom: 16px;
      line-height: 1.35;
    }
    .case-body {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .case-metrics-row {
      display: flex;
      gap: 28px;
    }
    .case-m-val {
      font-family: var(--font-mono);
      font-size: 26px;
      font-weight: 800;
      color: var(--primary-dark);
    }
    .case-m-label {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 板块9：前沿资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 26px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-date {
      font-family: var(--font-mono);
      font-size: 12px;
      color: var(--text-light);
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 12px;
      line-height: 1.45;
    }
    .news-excerpt {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .news-tag {
      font-size: 12px;
      color: var(--accent);
      font-weight: 600;
    }

    /* 板块10：套餐版本对比 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
      align-items: stretch;
    }
    .pricing-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 36px 30px;
      display: flex;
      flex-direction: column;
      position: relative;
    }
    .pricing-card.featured {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-lg);
      transform: scale(1.02);
    }
    .pricing-badge {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--primary);
      color: #FFFFFF;
      font-size: 12px;
      font-weight: 700;
      padding: 3px 12px;
      border-radius: 20px;
    }
    .pricing-tier {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .pricing-p {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 24px;
      min-height: 40px;
    }
    .pricing-price {
      font-family: var(--font-mono);
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 24px;
      color: var(--text-main);
    }
    .pricing-list {
      list-style: none;
      margin-bottom: 32px;
      flex-grow: 1;
    }
    .pricing-list li {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .pricing-list li::before {
      content: "✓";
      color: var(--primary);
      font-weight: bold;
    }
    .btn-pricing {
      display: block;
      width: 100%;
      text-align: center;
      padding: 12px 0;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 700;
      border: 1px solid var(--border);
      background: #FFFFFF;
      color: var(--text-main);
      transition: all 0.2s;
    }
    .pricing-card.featured .btn-pricing {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border: none;
      color: #FFFFFF;
    }
    .btn-pricing:hover {
      background: var(--bg-sub);
    }
    .pricing-card.featured .btn-pricing:hover {
      opacity: 0.92;
    }

    /* 板块11：评价墙 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
    }
    .testi-quote {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 20px;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .testi-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--bg-sub);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--accent);
      border: 1px solid var(--border);
    }
    .testi-info h5 {
      font-size: 14px;
      font-weight: 700;
    }
    .testi-info span {
      font-size: 12px;
      color: var(--text-light);
    }

    /* 板块12：平台保障条 */
    .guarantee-bar {
      background: #111827;
      color: #F9FAFB;
      border-radius: var(--radius-md);
      padding: 36px 40px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-item {
      border-left: 2px solid var(--primary);
      padding-left: 16px;
    }
    .guarantee-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
      color: #FFFFFF;
    }
    .guarantee-desc {
      font-size: 13px;
      color: #9CA3AF;
      line-height: 1.6;
    }

    /* 板块13：常见技术问答 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      background: #FFFFFF;
      overflow: hidden;
    }
    .faq-summary {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      cursor: pointer;
      user-select: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-summary::-webkit-details-marker { display: none; }
    .faq-summary::after {
      content: "+";
      font-size: 20px;
      font-weight: 400;
      color: var(--text-light);
      transition: transform 0.2s;
    }
    details[open] .faq-summary::after {
      content: "−";
    }
    .faq-answer {
      padding: 0 24px 22px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.8;
      border-top: 1px solid var(--border);
      padding-top: 16px;
    }

    /* 板块14：终极转化表单 */
    .cta-banner {
      background: linear-gradient(135deg, #064E3B 0%, #0D1117 100%);
      border: 1px solid rgba(0, 208, 132, 0.2);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      color: #FFFFFF;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }
    .cta-title {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .cta-desc {
      font-size: 15px;
      color: #A7F3D0;
      line-height: 1.75;
      margin-bottom: 24px;
    }
    .cta-form-box {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-md);
      padding: 28px;
    }

    /* 页脚系统 */
    .site-footer {
      background-color: var(--bg-dark);
      color: #9CA3AF;
      padding: 72px 0 32px;
      border-top: 1px solid var(--border-dark);
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 14px;
    }
    .footer-brand p {
      line-height: 1.75;
      margin-bottom: 16px;
    }
    .footer-col h5 {
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-meta-item {
      margin-bottom: 8px;
      line-height: 1.6;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
    }
    .footer-bottom a:hover {
      color: #FFFFFF;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .tactics-board, .case-story-card, .cta-banner {
        grid-template-columns: 1fr;
      }
      .pain-grid, .tech-grid, .pricing-grid, .news-grid, .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .guarantee-bar, .social-proof-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .top-bar { display: none; }
      .nav-links { display: none; }
      .hero-h1 { font-size: 32px; }
      .section-title { font-size: 26px; }
      .pain-grid, .tech-grid, .scenario-grid, .pricing-grid, .news-grid, .testimonial-grid, .solution-grid {
        grid-template-columns: 1fr;
      }
      .guarantee-bar, .social-proof-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-padding { padding: 60px 0; }
      .cta-banner { padding: 36px 20px; }
    }