/* roulang page: index */
:root {
      --tennis-green: #0E6342;
      --tennis-green-dark: #09472e;
      --tennis-green-light: #16885c;
      --tennis-court-blue: #0F1E2E;
      --tennis-court-deep: #07121c;
      --tennis-yellow: #CCFF00;
      --tennis-yellow-hover: #b5e600;
      --tennis-bg-gray: #F4F7F5;
      --tennis-card-border: #E2EAE5;
      --text-main: #1A2421;
      --text-muted: #5A6B65;
      --text-light: #8E9E98;
      --white: #FFFFFF;
      --danger-red: #D9383A;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-full: 9999px;
      --shadow-sm: 0 2px 8px rgba(14, 99, 66, 0.05);
      --shadow-card: 0 8px 28px rgba(10, 25, 38, 0.07);
      --shadow-hover: 0 16px 36px rgba(14, 99, 66, 0.14);
      --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

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

    body {
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--white);
      line-height: 1.7;
      overflow-x: hidden;
    }

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

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

    button, input, select, textarea {
      font-family: inherit;
    }

    /* 容器体系 */
    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    .section-spacing {
      padding-top: 96px;
      padding-bottom: 96px;
    }

    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 54px;
    }

    .badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.5px;
      text-transform: uppercase;
      border-radius: var(--radius-full);
      background: rgba(14, 99, 66, 0.1);
      color: var(--tennis-green);
      margin-bottom: 16px;
    }

    .badge-pill.yellow {
      background: var(--tennis-yellow);
      color: var(--tennis-court-blue);
    }

    .section-title {
      font-size: 34px;
      font-weight: 700;
      line-height: 1.3;
      color: var(--tennis-court-blue);
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.75;
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 48px;
      padding: 0 28px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-full);
      border: 1px solid transparent;
      cursor: pointer;
      transition: var(--transition);
      text-align: center;
      white-space: nowrap;
    }

    .btn-tennis-yellow {
      background-color: var(--tennis-yellow);
      color: var(--tennis-court-blue);
      box-shadow: 0 4px 14px rgba(204, 255, 0, 0.4);
    }

    .btn-tennis-yellow:hover {
      background-color: var(--tennis-yellow-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(204, 255, 0, 0.5);
    }

    .btn-tennis-green {
      background-color: var(--tennis-green);
      color: var(--white);
    }

    .btn-tennis-green:hover {
      background-color: var(--tennis-green-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(14, 99, 66, 0.3);
    }

    .btn-outline-white {
      background-color: transparent;
      border-color: rgba(255, 255, 255, 0.35);
      color: var(--white);
    }

    .btn-outline-white:hover {
      border-color: var(--white);
      background-color: rgba(255, 255, 255, 0.1);
    }

    .btn-outline-green {
      background-color: transparent;
      border-color: var(--tennis-green);
      color: var(--tennis-green);
    }

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

    /* 顶部双行导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: var(--white);
      box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
    }

    .header-topbar {
      background: var(--tennis-court-blue);
      color: #9ab3c6;
      font-size: 12px;
      padding: 7px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .topbar-wrapper {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .topbar-links {
      display: flex;
      gap: 20px;
    }

    .header-main {
      padding: 14px 0;
      background: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(10px);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .logo-ball {
      width: 38px;
      height: 38px;
      background: var(--tennis-green);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--tennis-yellow);
      font-weight: 900;
      font-size: 20px;
      box-shadow: 0 3px 10px rgba(14, 99, 66, 0.3);
      position: relative;
    }

    .logo-ball::after {
      content: "";
      position: absolute;
      width: 32px;
      height: 32px;
      border: 2px dashed rgba(204, 255, 0, 0.6);
      border-radius: 50%;
    }

    .brand-text {
      display: flex;
      flex-direction: column;
    }

    .brand-name {
      font-size: 20px;
      font-weight: 800;
      color: var(--tennis-court-blue);
      line-height: 1.2;
      letter-spacing: -0.5px;
    }

    .brand-tagline {
      font-size: 11px;
      color: var(--tennis-green);
      font-weight: 600;
      letter-spacing: 0.5px;
    }

    .desktop-nav {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .desktop-nav a {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      padding: 6px 2px;
      position: relative;
    }

    .desktop-nav a:hover,
    .desktop-nav a.active {
      color: var(--tennis-green);
    }

    .desktop-nav a::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--tennis-yellow);
      transition: width 0.3s ease;
    }

    .desktop-nav a:hover::after,
    .desktop-nav a.active::after {
      width: 100%;
    }

    .mobile-toggle {
      display: none;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .mobile-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--tennis-court-blue);
      margin: 5px 0;
      transition: 0.3s;
    }

    /* 移动端菜单抽屉 */
    .mobile-nav-drawer {
      display: none;
      position: fixed;
      top: 96px;
      left: 0;
      right: 0;
      background: #FFFFFF;
      padding: 24px;
      box-shadow: 0 20px 30px rgba(0,0,0,0.1);
      border-top: 1px solid var(--tennis-card-border);
      z-index: 999;
    }

    .mobile-nav-drawer.active {
      display: block;
    }

    .mobile-nav-drawer a {
      display: block;
      padding: 12px 0;
      font-size: 16px;
      font-weight: 600;
      border-bottom: 1px solid #f0f0f0;
      color: var(--tennis-court-blue);
    }

    .mobile-nav-drawer .mobile-cta {
      margin-top: 20px;
      width: 100%;
    }

    /* HERO 首屏板块（API/开发者与控制台融合风格） */
    .hero-section {
      background: linear-gradient(135deg, rgba(7, 18, 28, 0.94) 0%, rgba(14, 99, 66, 0.88) 100%),
                  url('/assets/images/d395332999d22f0d.webp') center/cover no-repeat;
      padding: 100px 0 110px;
      color: var(--white);
      position: relative;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 42px;
      line-height: 1.22;
      font-weight: 800;
      color: var(--white);
      margin-bottom: 22px;
      letter-spacing: -0.8px;
    }

    .hero-content h1 span {
      color: var(--tennis-yellow);
    }

    .hero-paragraph {
      font-size: 17px;
      color: #D1DFDA;
      line-height: 1.75;
      margin-bottom: 34px;
    }

    .hero-action-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 38px;
    }

    .hero-trust-bar {
      display: flex;
      align-items: center;
      gap: 28px;
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      padding-top: 24px;
    }

    .trust-stat-item {
      display: flex;
      flex-direction: column;
    }

    .trust-stat-num {
      font-size: 22px;
      font-weight: 800;
      color: var(--tennis-yellow);
      line-height: 1;
      margin-bottom: 4px;
    }

    .trust-stat-label {
      font-size: 12px;
      color: #A3BFB6;
    }

    /* 模拟终端与控制台面板 */
    .hero-console-card {
      background: rgba(10, 25, 38, 0.88);
      border: 1px solid rgba(204, 255, 0, 0.25);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
      backdrop-filter: blur(12px);
    }

    .console-header {
      background: #060e16;
      padding: 12px 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .console-dots {
      display: flex;
      gap: 6px;
    }

    .console-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: #4A5568;
    }

    .console-dot:nth-child(1) { background: #FF5F56; }
    .console-dot:nth-child(2) { background: #FFBD2E; }
    .console-dot:nth-child(3) { background: #27C93F; }

    .console-title {
      font-size: 12px;
      font-family: monospace;
      color: #718096;
    }

    .console-body {
      padding: 22px;
      font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
      font-size: 13px;
      line-height: 1.6;
      color: #A0AEC0;
    }

    .code-comment { color: #4A5568; }
    .code-key { color: var(--tennis-yellow); }
    .code-string { color: #68D391; }
    .code-num { color: #63B3ED; }

    .console-footer-cta {
      background: rgba(14, 99, 66, 0.35);
      padding: 14px 22px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

    .console-footer-cta span {
      font-size: 13px;
      color: var(--white);
    }

    /* 板块 1: 痛点卡片 (#pain-points) */
    .bg-light-tennis {
      background-color: var(--tennis-bg-gray);
    }

    .pain-cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .pain-card {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 34px 28px;
      border-top: 4px solid var(--danger-red);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
    }

    .pain-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-card);
    }

    .pain-icon-wrapper {
      width: 48px;
      height: 48px;
      background: rgba(217, 56, 58, 0.1);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--danger-red);
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 20px;
    }

    .pain-card h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--tennis-court-blue);
      margin-bottom: 12px;
    }

    .pain-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.68;
    }

    /* 板块 2: 产品概述与规范 (#overview) */
    .overview-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }

    .overview-image-box {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }

    .overview-image-box img {
      width: 100%;
      height: 440px;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

    .overview-image-box:hover img {
      transform: scale(1.03);
    }

    .overview-badge-float {
      position: absolute;
      bottom: 24px;
      left: 24px;
      right: 24px;
      background: rgba(15, 30, 46, 0.92);
      backdrop-filter: blur(8px);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      color: var(--white);
      border-left: 4px solid var(--tennis-yellow);
    }

    .overview-badge-float h4 {
      font-size: 15px;
      margin-bottom: 4px;
      color: var(--tennis-yellow);
    }

    .overview-badge-float p {
      font-size: 12px;
      color: #CFD8DC;
      line-height: 1.4;
    }

    .overview-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-top: 28px;
    }

    .overview-item {
      display: flex;
      gap: 16px;
    }

    .overview-check {
      width: 24px;
      height: 24px;
      background: var(--tennis-green);
      color: var(--tennis-yellow);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      font-weight: 800;
      flex-shrink: 0;
      margin-top: 3px;
    }

    .overview-item h4 {
      font-size: 17px;
      font-weight: 700;
      color: var(--tennis-court-blue);
      margin-bottom: 6px;
    }

    .overview-item p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 3: 核心优势六矩阵 (#features) */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .feature-card {
      background: var(--white);
      border: 1px solid var(--tennis-card-border);
      border-radius: var(--radius-md);
      padding: 36px 30px;
      position: relative;
      overflow: hidden;
      transition: var(--transition);
    }

    .feature-card::before {
      content: "";
      position: absolute;
      top: 0;
      right: 0;
      width: 70px;
      height: 70px;
      background: radial-gradient(circle, rgba(204, 255, 0, 0.25) 0%, transparent 70%);
      pointer-events: none;
    }

    .feature-card:hover {
      border-color: var(--tennis-green);
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }

    .feature-icon {
      width: 52px;
      height: 52px;
      background: rgba(14, 99, 66, 0.08);
      color: var(--tennis-green);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 22px;
      font-weight: bold;
    }

    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--tennis-court-blue);
      margin-bottom: 12px;
    }

    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.68;
    }

    /* 板块 4: 热门产品模块对比 (#modules) */
    .modules-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      align-items: stretch;
    }

    .module-card {
      background: var(--white);
      border: 1px solid var(--tennis-card-border);
      border-radius: var(--radius-lg);
      padding: 40px 32px;
      display: flex;
      flex-direction: column;
      position: relative;
      transition: var(--transition);
    }

    .module-card.highlight {
      border: 2px solid var(--tennis-green);
      box-shadow: 0 12px 36px rgba(14, 99, 66, 0.15);
      transform: translateY(-8px);
    }

    .module-badge {
      position: absolute;
      top: -14px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--tennis-yellow);
      color: var(--tennis-court-blue);
      font-size: 12px;
      font-weight: 800;
      padding: 4px 16px;
      border-radius: var(--radius-full);
      box-shadow: 0 3px 8px rgba(0,0,0,0.12);
    }

    .module-title {
      font-size: 22px;
      font-weight: 700;
      color: var(--tennis-court-blue);
      margin-bottom: 8px;
      text-align: center;
    }

    .module-role {
      font-size: 13px;
      color: var(--tennis-green);
      font-weight: 600;
      text-align: center;
      margin-bottom: 24px;
    }

    .module-features-list {
      list-style: none;
      margin-bottom: 32px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .module-features-list li {
      font-size: 14px;
      color: var(--text-main);
      display: flex;
      align-items: flex-start;
      gap: 10px;
      line-height: 1.5;
    }

    .module-features-list li::before {
      content: "✓";
      color: var(--tennis-green);
      font-weight: 800;
    }

    /* 板块 5: 方法与实施四步流 (#workflow) */
    .workflow-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
      margin-top: 20px;
    }

    .workflow-step {
      background: var(--white);
      border: 1px solid var(--tennis-card-border);
      padding: 32px 24px;
      border-radius: var(--radius-md);
      position: relative;
      display: flex;
      flex-direction: column;
    }

    .step-number {
      font-size: 38px;
      font-weight: 900;
      color: rgba(14, 99, 66, 0.15);
      line-height: 1;
      margin-bottom: 12px;
    }

    .workflow-step h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--tennis-court-blue);
      margin-bottom: 10px;
    }

    .workflow-step p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 板块 6: 深色硬件联动与雷达分析 (#deep-tech) */
    .deep-tech-section {
      background-color: var(--tennis-court-blue);
      color: var(--white);
      position: relative;
      overflow: hidden;
    }

    .deep-tech-section::before {
      content: "";
      position: absolute;
      width: 500px;
      height: 500px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(14, 99, 66, 0.4) 0%, transparent 70%);
      top: -150px;
      right: -100px;
    }

    .deep-tech-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 54px;
      align-items: center;
      position: relative;
      z-index: 2;
    }

    .radar-display-box {
      background: rgba(7, 18, 28, 0.75);
      border: 1px solid rgba(204, 255, 0, 0.3);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: 0 20px 45px rgba(0, 0, 0, 0.5);
    }

    .radar-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--tennis-yellow);
      letter-spacing: 1px;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .radar-metrics-bars {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .metric-row {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .metric-meta {
      display: flex;
      justify-content: space-between;
      font-size: 13px;
      color: #B0BEC5;
    }

    .metric-track {
      width: 100%;
      height: 8px;
      background: rgba(255, 255, 255, 0.1);
      border-radius: 4px;
      overflow: hidden;
    }

    .metric-progress {
      height: 100%;
      border-radius: 4px;
      background: linear-gradient(90deg, var(--tennis-green-light), var(--tennis-yellow));
    }

    .deep-tech-content h2 {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 20px;
      color: var(--white);
    }

    .deep-tech-content p {
      font-size: 15px;
      color: #B0BEC5;
      line-height: 1.8;
      margin-bottom: 24px;
    }

    .deep-tech-bullets {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .deep-tech-bullets li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 14px;
      color: #ECEFF1;
    }

    .deep-tech-bullets li span {
      color: var(--tennis-yellow);
      font-weight: bold;
    }

    /* 板块 7: 用户实战案例 Tabs (#case-studies) */
    .case-card {
      background: var(--white);
      border-radius: var(--radius-lg);
      border: 1px solid var(--tennis-card-border);
      overflow: hidden;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      box-shadow: var(--shadow-card);
    }

    .case-media img {
      width: 100%;
      height: 100%;
      min-height: 380px;
      object-fit: cover;
    }

    .case-details {
      padding: 44px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .case-tag {
      font-size: 12px;
      color: var(--tennis-green);
      font-weight: 700;
      letter-spacing: 0.5px;
      margin-bottom: 12px;
    }

    .case-details h3 {
      font-size: 24px;
      font-weight: 700;
      color: var(--tennis-court-blue);
      margin-bottom: 16px;
      line-height: 1.35;
    }

    .case-details p {
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 26px;
    }

    .case-stat-strip {
      display: flex;
      gap: 32px;
      border-top: 1px solid var(--tennis-card-border);
      padding-top: 20px;
    }

    .case-stat-strip-item strong {
      display: block;
      font-size: 22px;
      font-weight: 800;
      color: var(--tennis-green);
      line-height: 1.1;
    }

    .case-stat-strip-item span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 板块 8: 关键数据统计条 (#metrics) */
    .metrics-strip {
      background: linear-gradient(135deg, var(--tennis-court-blue) 0%, #15324d 100%);
      padding: 68px 0;
      color: var(--white);
    }

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
      text-align: center;
    }

    .metric-block {
      border-right: 1px solid rgba(255, 255, 255, 0.12);
      padding: 0 16px;
    }

    .metric-block:last-child {
      border-right: none;
    }

    .metric-block-num {
      font-size: 46px;
      font-weight: 900;
      color: var(--tennis-yellow);
      line-height: 1.1;
      margin-bottom: 8px;
    }

    .metric-block-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .metric-block-desc {
      font-size: 13px;
      color: #90A4AE;
    }

    /* 板块 9: 多角色客户证言 (#testimonials) */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .testimonial-card {
      background: var(--white);
      border: 1px solid var(--tennis-card-border);
      border-radius: var(--radius-md);
      padding: 34px 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
    }

    .testimonial-quote {
      font-size: 14.5px;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 24px;
      position: relative;
    }

    .testimonial-quote::before {
      content: "“";
      font-size: 40px;
      color: rgba(14, 99, 66, 0.2);
      line-height: 1;
      display: block;
      margin-bottom: 6px;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid #ECEFF1;
      padding-top: 16px;
    }

    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--tennis-green);
      color: var(--white);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 16px;
    }

    .author-info h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--tennis-court-blue);
    }

    .author-info span {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 板块 10: 适用人群与细分场景 (#personas) */
    .personas-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 22px;
    }

    .persona-capsule {
      background: var(--white);
      border: 1px solid var(--tennis-card-border);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      text-align: center;
      transition: var(--transition);
    }

    .persona-capsule:hover {
      border-color: var(--tennis-green);
      box-shadow: var(--shadow-card);
      transform: translateY(-4px);
    }

    .persona-badge {
      width: 50px;
      height: 50px;
      margin: 0 auto 16px;
      background: rgba(14, 99, 66, 0.08);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--tennis-green);
      font-weight: 800;
      font-size: 18px;
    }

    .persona-capsule h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--tennis-court-blue);
      margin-bottom: 10px;
    }

    .persona-capsule p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 11: 网球教学资讯与行业动态 (#insights) */
    .insights-layout {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 32px;
    }

    .insight-featured {
      background: var(--white);
      border-radius: var(--radius-md);
      border: 1px solid var(--tennis-card-border);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .insight-featured img {
      width: 100%;
      height: 250px;
      object-fit: cover;
    }

    .insight-featured-body {
      padding: 28px;
    }

    .insight-date {
      font-size: 12px;
      color: var(--text-light);
      margin-bottom: 8px;
    }

    .insight-featured-body h3 {
      font-size: 20px;
      font-weight: 700;
      color: var(--tennis-court-blue);
      margin-bottom: 12px;
      line-height: 1.4;
    }

    .insight-featured-body p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 18px;
    }

    .insight-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .insight-item-small {
      background: var(--white);
      border: 1px solid var(--tennis-card-border);
      border-radius: var(--radius-md);
      padding: 20px;
      transition: var(--transition);
      cursor: pointer;
    }

    .insight-item-small:hover {
      border-color: var(--tennis-green);
      transform: translateX(4px);
    }

    .insight-item-small h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--tennis-court-blue);
      margin-bottom: 8px;
      line-height: 1.4;
    }

    .insight-item-small p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块 12: FAQ 常见疑难手风琴 (#faq) */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: var(--white);
      border: 1px solid var(--tennis-card-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--tennis-court-blue);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

    .faq-question:hover {
      color: var(--tennis-green);
    }

    .faq-toggle-icon {
      font-size: 18px;
      font-weight: 600;
      transition: transform 0.3s;
      color: var(--tennis-green);
    }

    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .faq-item.open {
      border-color: var(--tennis-green);
      box-shadow: var(--shadow-sm);
    }

    .faq-item.open .faq-answer {
      padding: 0 24px 22px;
      max-height: 240px;
    }

    .faq-item.open .faq-toggle-icon {
      transform: rotate(45px);
    }

    /* 板块 13: 底部高转化咨询 CTA (#consult) */
    .consult-banner {
      background: linear-gradient(135deg, var(--tennis-green-dark) 0%, var(--tennis-court-blue) 100%);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      color: var(--white);
      box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
    }

    .consult-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }

    .consult-text h2 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 16px;
      line-height: 1.25;
      color: var(--white);
    }

    .consult-text p {
      font-size: 15px;
      color: #CFD8DC;
      line-height: 1.7;
      margin-bottom: 28px;
    }

    .consult-contact-info {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .consult-contact-line {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 14.5px;
      color: #ECEFF1;
    }

    .consult-form {
      background: var(--white);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--tennis-court-blue);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      height: 44px;
      padding: 0 14px;
      border: 1px solid #CFD8DC;
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--tennis-green);
    }

    .form-submit-btn {
      width: 100%;
      margin-top: 8px;
    }

    /* 页脚合规规范 */
    .site-footer {
      background: var(--tennis-court-deep);
      color: #90A4AE;
      font-size: 13px;
      padding-top: 70px;
      padding-bottom: 35px;
      border-top: 3px solid var(--tennis-green);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 20px;
      position: relative;
    }

    .footer-col h4::after {
      content: "";
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 24px;
      height: 2px;
      background: var(--tennis-yellow);
    }

    .footer-col p {
      line-height: 1.7;
      margin-bottom: 14px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a:hover {
      color: var(--tennis-yellow);
      padding-left: 4px;
    }

    .footer-bottom-bar {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 12px;
    }

    .footer-bottom-bar a {
      color: #90A4AE;
    }

    .footer-bottom-bar a:hover {
      color: var(--white);
    }

    /* 响应式断点系统 */
    @media (max-width: 1024px) {
      .hero-grid,
      .overview-grid,
      .case-card,
      .deep-tech-grid,
      .insights-layout,
      .consult-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .features-grid,
      .pain-cards-grid,
      .modules-grid,
      .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .personas-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 32px;
      }
      .metric-block:nth-child(2) {
        border-right: none;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 820px) {
      .desktop-nav,
      .header-topbar {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .section-spacing {
        padding-top: 64px;
        padding-bottom: 64px;
      }
      .hero-content h1 {
        font-size: 30px;
      }
      .section-title {
        font-size: 26px;
      }
      .features-grid,
      .pain-cards-grid,
      .modules-grid,
      .testimonials-grid,
      .workflow-timeline,
      .personas-grid,
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .metric-block {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding-bottom: 20px;
      }
      .metric-block:last-child {
        border-bottom: none;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .consult-banner {
        padding: 36px 24px;
      }
    }