/* roulang page: index */
:root {
      --color-primary: #059669;
      --color-primary-light: #10b981;
      --color-primary-dark: #047857;
      --color-accent: #f59e0b;
      --color-bg-base: #f8fafc;
      --color-bg-card: #ffffff;
      --color-bg-dark: #0f172a;
      --color-bg-darker: #090d16;
      --color-text-main: #0f172a;
      --color-text-muted: #64748b;
      --color-text-light: #f1f5f9;
      --color-border: #e2e8f0;
      --color-border-dark: #1e293b;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 12px 30px -4px rgba(15, 23, 42, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-full: 9999px;
      --transition-fast: 0.2s ease;
      --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Source Han Sans CN", sans-serif;
      line-height: 1.75;
      color: var(--color-text-main);
      background-color: var(--color-bg-base);
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--transition-fast);
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    button, input, select {
      font: inherit;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部元信息条 */
    .top-bar {
      background-color: #0b1322;
      color: #94a3b8;
      font-size: 13px;
      border-bottom: 1px solid #1e293b;
      padding: 6px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-links a {
      color: #cbd5e1;
      margin-left: 20px;
    }
    .top-bar-links a:hover {
      color: var(--color-primary-light);
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 1px 10px rgba(0,0,0,0.05);
      transition: background var(--transition-normal);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .site-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: var(--color-text-main);
      letter-spacing: -0.02em;
    }
    .logo-badge {
      background: linear-gradient(135deg, var(--color-primary), #0d9488);
      color: #fff;
      font-size: 13px;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: var(--radius-sm);
      text-transform: uppercase;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: #334155;
      padding: 6px 0;
      position: relative;
    }
    .nav-link:hover {
      color: var(--color-primary);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--color-primary);
      transition: width var(--transition-fast);
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .nav-cta {
      background-color: var(--color-primary);
      color: #ffffff !important;
      padding: 9px 20px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      box-shadow: 0 4px 12px rgba(5, 150, 105, 0.25);
      transition: var(--transition-fast);
    }
    .nav-cta:hover {
      background-color: var(--color-primary-dark);
      transform: translateY(-1px);
    }

    /* 移动端汉堡按钮 */
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: #0f172a;
      margin: 5px 0;
      transition: var(--transition-fast);
    }

    /* 通用板块与排版 */
    section {
      padding: 90px 0;
      position: relative;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--color-primary);
      background-color: rgba(5, 150, 105, 0.1);
      padding: 4px 12px;
      border-radius: var(--radius-full);
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }
    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 56px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.3;
      color: var(--color-text-main);
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--color-text-muted);
      line-height: 1.8;
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 13px 28px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      transition: var(--transition-normal);
      border: 1px solid transparent;
      text-align: center;
    }
    .btn-primary {
      background-color: var(--color-primary);
      color: #fff;
      box-shadow: 0 4px 14px rgba(5, 150, 105, 0.3);
    }
    .btn-primary:hover {
      background-color: var(--color-primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(5, 150, 105, 0.4);
    }
    .btn-accent {
      background-color: var(--color-accent);
      color: #0f172a;
      box-shadow: 0 4px 14px rgba(245, 158, 11, 0.25);
    }
    .btn-accent:hover {
      background-color: #d97706;
      color: #fff;
      transform: translateY(-2px);
    }
    .btn-outline {
      background: transparent;
      color: #ffffff;
      border-color: rgba(255, 255, 255, 0.3);
    }
    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: #ffffff;
    }
    .btn-outline-dark {
      background: #ffffff;
      color: var(--color-text-main);
      border-color: var(--color-border);
    }
    .btn-outline-dark:hover {
      border-color: var(--color-primary);
      color: var(--color-primary);
      background-color: #f0fdf4;
    }

    /* Section 1: Hero 工业参数首屏 */
    .hero-section {
      background: linear-gradient(rgba(11, 19, 34, 0.88), rgba(15, 23, 42, 0.92)), url('/assets/images/ec00de52b2a50504.jpg') center/cover no-repeat;
      color: #ffffff;
      padding: 100px 0 90px;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.01em;
      margin-bottom: 20px;
      color: #ffffff;
    }
    .hero-content h1 span {
      color: var(--color-primary-light);
    }
    .hero-desc {
      font-size: 16px;
      color: #cbd5e1;
      margin-bottom: 32px;
      line-height: 1.8;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .hero-platforms {
      display: flex;
      align-items: center;
      gap: 16px;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      font-size: 14px;
      color: #94a3b8;
    }
    .platform-tags {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }
    .platform-pill {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
      color: #e2e8f0;
    }
    /* Hero 参数仪表盘卡片 */
    .hero-spec-card {
      background: rgba(30, 41, 59, 0.7);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    }
    .spec-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      padding-bottom: 16px;
    }
    .spec-status {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: #34d399;
    }
    .spec-status-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #34d399;
      box-shadow: 0 0 10px #34d399;
    }
    .spec-rows {
      display: grid;
      gap: 16px;
    }
    .spec-row-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 14px;
    }
    .spec-name {
      color: #94a3b8;
    }
    .spec-value {
      color: #ffffff;
      font-weight: 700;
      font-family: monospace;
    }
    .spec-bar-wrap {
      width: 100%;
      height: 6px;
      background: rgba(255,255,255,0.1);
      border-radius: 3px;
      margin-top: 6px;
      overflow: hidden;
    }
    .spec-bar-fill {
      height: 100%;
      background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
      border-radius: 3px;
    }

    /* Section 2: 产品价值（对比/核心定位） */
    .value-section {
      background-color: #ffffff;
    }
    .value-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .value-card {
      padding: 36px 28px;
      border-radius: var(--radius-md);
      background: var(--color-bg-base);
      border: 1px solid var(--color-border);
      transition: var(--transition-normal);
    }
    .value-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--color-primary-light);
    }
    .value-icon {
      width: 52px;
      height: 52px;
      border-radius: 10px;
      background: rgba(5, 150, 105, 0.12);
      color: var(--color-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      font-weight: 800;
      margin-bottom: 20px;
    }
    .value-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .value-card p {
      font-size: 15px;
      color: var(--color-text-muted);
      line-height: 1.7;
    }

    /* Section 3: 功能展示（卖点六宫格矩阵） */
    .features-section {
      background-color: #f1f5f9;
    }
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .feature-box {
      background: #ffffff;
      padding: 32px 24px;
      border-radius: var(--radius-md);
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-normal);
    }
    .feature-box:hover {
      box-shadow: var(--shadow-md);
      border-color: var(--color-primary-light);
      transform: translateY(-3px);
    }
    .feature-top {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
    }
    .feature-metric-badge {
      font-size: 12px;
      font-weight: 700;
      background: #e0f2fe;
      color: #0369a1;
      padding: 2px 8px;
      border-radius: var(--radius-sm);
    }
    .feature-box h3 {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .feature-box p {
      font-size: 14px;
      color: var(--color-text-muted);
      line-height: 1.65;
    }

    /* Section 4: 热门解决方案矩阵 */
    .solution-section {
      background-color: #ffffff;
    }
    .solution-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .solution-card {
      background: #ffffff;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-normal);
    }
    .solution-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: var(--color-primary);
    }
    .solution-thumb {
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .solution-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .solution-card:hover .solution-thumb img {
      transform: scale(1.05);
    }
    .solution-body {
      padding: 28px 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .solution-badge {
      align-self: flex-start;
      background: #fef3c7;
      color: #b45309;
      font-size: 12px;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .solution-body h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .solution-body p {
      font-size: 14px;
      color: var(--color-text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .solution-specs {
      list-style: none;
      margin-bottom: 24px;
      border-top: 1px dashed var(--color-border);
      padding-top: 16px;
    }
    .solution-specs li {
      font-size: 13px;
      color: #475569;
      display: flex;
      align-items: center;
      margin-bottom: 8px;
    }
    .solution-specs li::before {
      content: "✔";
      color: var(--color-primary);
      margin-right: 8px;
      font-weight: bold;
    }
    .solution-btn {
      margin-top: auto;
    }

    /* Section 5: 三步上手配置规范 */
    .steps-section {
      background-color: #f8fafc;
      border-top: 1px solid var(--color-border);
    }
    .step-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      padding: 36px 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      position: relative;
    }
    .step-num {
      position: absolute;
      top: -16px;
      left: 28px;
      width: 36px;
      height: 36px;
      background: var(--color-primary);
      color: #ffffff;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 10px rgba(5, 150, 105, 0.3);
    }
    .step-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-top: 10px;
      margin-bottom: 12px;
    }
    .step-card p {
      font-size: 14px;
      color: var(--color-text-muted);
      line-height: 1.7;
    }

    /* Section 6: 深色沉浸式实战案例 */
    .dark-case-section {
      background-color: var(--color-bg-darker);
      color: #ffffff;
    }
    .dark-case-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .case-left h2 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 20px;
      line-height: 1.3;
    }
    .case-left p {
      font-size: 15px;
      color: #94a3b8;
      line-height: 1.8;
      margin-bottom: 28px;
    }
    .tech-stack-pills {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      margin-bottom: 32px;
    }
    .tech-pill {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: #38bdf8;
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      font-size: 13px;
      font-family: monospace;
    }
    .case-card-preview {
      background: #1e293b;
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    }
    .case-img-wrap {
      border-radius: 8px;
      overflow: hidden;
      margin-bottom: 18px;
    }
    .case-metrics-bar {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      text-align: center;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 16px;
    }
    .case-metric-val {
      font-size: 20px;
      font-weight: 800;
      color: var(--color-primary-light);
    }
    .case-metric-lbl {
      font-size: 12px;
      color: #94a3b8;
    }

    /* Section 7: 多端入口与协同场景 */
    .scenario-section {
      background: #ffffff;
    }
    .scenario-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
      margin-bottom: 64px;
    }
    .scenario-row:last-child {
      margin-bottom: 0;
    }
    .scenario-row.reverse {
      direction: rtl;
    }
    .scenario-row.reverse .scenario-text {
      direction: ltr;
    }
    .scenario-img-box {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--color-border);
    }
    .scenario-text h3 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--color-text-main);
    }
    .scenario-text p {
      font-size: 15px;
      color: var(--color-text-muted);
      line-height: 1.8;
      margin-bottom: 20px;
    }
    .scenario-check-list {
      list-style: none;
    }
    .scenario-check-list li {
      font-size: 14px;
      color: #334155;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    /* Section 8: 成功数据对比条 */
    .metrics-strip {
      background: linear-gradient(135deg, #065f46, #047857);
      color: #ffffff;
      padding: 60px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      text-align: center;
    }
    .metric-number {
      font-size: 42px;
      font-weight: 800;
      letter-spacing: -0.02em;
      margin-bottom: 6px;
      font-family: monospace;
    }
    .metric-label {
      font-size: 14px;
      color: #d1fae5;
    }

    /* Section 9: 评价墙（社会认同） */
    .testimonial-section {
      background-color: #f8fafc;
    }
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .testi-card {
      background: #ffffff;
      padding: 32px 26px;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-stars {
      color: #f59e0b;
      margin-bottom: 14px;
      font-size: 14px;
      letter-spacing: 2px;
    }
    .testi-text {
      font-size: 14px;
      color: #334155;
      line-height: 1.75;
      margin-bottom: 20px;
    }
    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 16px;
    }
    .testi-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #e2e8f0;
      color: #0f172a;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
    }
    .testi-info h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--color-text-main);
    }
    .testi-info p {
      font-size: 12px;
      color: var(--color-text-muted);
    }

    /* Section 10: 跨端系统环境与兼容要求 */
    .sysreq-section {
      background-color: #ffffff;
      border-top: 1px solid var(--color-border);
    }
    .sysreq-table-wrap {
      background: #ffffff;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .sysreq-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .sysreq-table th {
      background-color: #f8fafc;
      padding: 16px 20px;
      font-weight: 700;
      color: #334155;
      border-bottom: 1px solid var(--color-border);
    }
    .sysreq-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f1f5f9;
      color: #475569;
    }
    .sysreq-table tr:last-child td {
      border-bottom: none;
    }
    .sysreq-table tr:hover td {
      background-color: #f0fdf4;
    }
    .status-badge-ok {
      display: inline-flex;
      align-items: center;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 12px;
      background: #dcfce7;
      color: #15803d;
      font-weight: 600;
    }

    /* Section 11: 资讯研报与技术沉淀摘要 */
    .insight-section {
      background-color: #f8fafc;
    }
    .insight-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .insight-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: var(--transition-normal);
    }
    .insight-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--color-primary-light);
    }
    .insight-img {
      height: 180px;
      overflow: hidden;
    }
    .insight-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .insight-card:hover .insight-img img {
      transform: scale(1.04);
    }
    .insight-content {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .insight-meta {
      font-size: 12px;
      color: #94a3b8;
      margin-bottom: 8px;
      display: flex;
      justify-content: space-between;
    }
    .insight-content h3 {
      font-size: 17px;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 10px;
      color: var(--color-text-main);
    }
    .insight-content p {
      font-size: 13px;
      color: var(--color-text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .insight-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--color-primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* Section 12: 异议拆解与开发答疑手风琴 */
    .faq-section {
      background-color: #ffffff;
      border-top: 1px solid var(--color-border);
    }
    .faq-wrap {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
      background: #ffffff;
      transition: border-color var(--transition-fast);
    }
    .faq-item.active {
      border-color: var(--color-primary);
    }
    .faq-question {
      padding: 20px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 700;
      font-size: 16px;
      color: var(--color-text-main);
      user-select: none;
    }
    .faq-icon {
      font-size: 18px;
      transition: transform 0.25s ease;
      color: var(--color-primary);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background-color: #f8fafc;
      font-size: 14px;
      color: #475569;
      line-height: 1.8;
      padding: 0 24px;
    }
    .faq-item.active .faq-answer {
      max-height: 240px;
      padding: 16px 24px 20px;
    }

    /* 研发与交付保障条 */
    .guarantee-bar {
      background: #0f172a;
      color: #ffffff;
      padding: 44px 0;
      border-top: 1px solid #1e293b;
    }
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-item {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .guarantee-icon {
      width: 44px;
      height: 44px;
      border-radius: 8px;
      background: rgba(5, 150, 105, 0.2);
      color: var(--color-primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      flex-shrink: 0;
    }
    .guarantee-text h4 {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 4px;
    }
    .guarantee-text p {
      font-size: 12px;
      color: #94a3b8;
    }

    /* 预约评估 CTA 区域 */
    .cta-section {
      background: radial-gradient(circle at 50% 50%, #1e293b 0%, #090d16 100%);
      color: #ffffff;
      padding: 90px 0;
      text-align: center;
    }
    .cta-box {
      max-width: 760px;
      margin: 0 auto;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 48px 40px;
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
    }
    .cta-box h2 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .cta-box p {
      font-size: 15px;
      color: #cbd5e1;
      margin-bottom: 32px;
      line-height: 1.7;
    }
    .cta-form {
      display: grid;
      grid-template-columns: 1fr 1fr auto;
      gap: 12px;
      text-align: left;
    }
    .cta-input, .cta-select {
      width: 100%;
      padding: 13px 16px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.2);
      background: rgba(15, 23, 42, 0.8);
      color: #ffffff;
      font-size: 14px;
      outline: none;
    }
    .cta-input:focus, .cta-select:focus {
      border-color: var(--color-primary-light);
    }

    /* 底部固定转化条 */
    .bottom-conversion-bar {
      position: fixed;
      bottom: 24px;
      right: 24px;
      z-index: 999;
      display: flex;
      align-items: center;
      gap: 12px;
      background: rgba(15, 23, 42, 0.95);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-full);
      padding: 8px 16px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
      transition: transform var(--transition-normal);
    }
    .b-bar-phone {
      font-size: 13px;
      font-weight: 700;
      color: #e2e8f0;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .b-bar-btn {
      background: var(--color-primary);
      color: #ffffff;
      font-size: 13px;
      font-weight: 600;
      padding: 8px 16px;
      border-radius: var(--radius-full);
      white-space: nowrap;
    }

    /* 页脚 */
    .site-footer {
      background-color: #070c14;
      color: #94a3b8;
      padding: 70px 0 30px;
      font-size: 14px;
      border-top: 1px solid #1e293b;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand h3 {
      font-size: 20px;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 14px;
    }
    .footer-brand p {
      font-size: 13px;
      line-height: 1.8;
      color: #64748b;
      margin-bottom: 18px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 18px;
    }
    .footer-col ul {
      list-style: none;
    }
    .footer-col li {
      margin-bottom: 10px;
    }
    .footer-col a {
      color: #94a3b8;
    }
    .footer-col a:hover {
      color: var(--color-primary-light);
    }
    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }

    /* 响应式样式处理 */
    @media (max-width: 1024px) {
      .hero-grid, .dark-case-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .value-grid, .feature-grid, .solution-grid, .step-grid, .testimonial-grid, .insight-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .guarantee-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 24px;
        gap: 16px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        display: none;
      }
      .nav-menu.open {
        display: flex;
      }
      .hero-content h1 {
        font-size: 32px;
      }
      .value-grid, .feature-grid, .solution-grid, .step-grid, .testimonial-grid, .insight-grid {
        grid-template-columns: 1fr;
      }
      .scenario-row, .scenario-row.reverse {
        grid-template-columns: 1fr;
        gap: 24px;
        direction: ltr;
      }
      .scenario-row.reverse .scenario-text {
        direction: ltr;
      }
      .guarantee-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .cta-form {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .bottom-conversion-bar {
        left: 12px;
        right: 12px;
        bottom: 12px;
        justify-content: space-between;
        border-radius: var(--radius-md);
      }
    }