/* roulang page: index */
:root {
      --color-primary: #0F172A;
      --color-primary-light: #1E293B;
      --color-accent-green: #00D598;
      --color-accent-green-dark: #059669;
      --color-accent-orange: #F97316;
      --color-bg-light: #F8FAFC;
      --color-bg-white: #FFFFFF;
      --color-bg-dark: #090D16;
      --color-text-main: #0F172A;
      --color-text-muted: #64748B;
      --color-text-sub: #475569;
      --color-border: #E2E8F0;
      --color-border-dark: #1E293B;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-soft: 0 20px 40px -15px rgba(15, 23, 42, 0.06);
      --shadow-hover: 0 24px 48px -12px rgba(15, 23, 42, 0.12);
      --font-stack: Inter, -apple-system, BlinkMacSystemFont, "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);
      color: var(--color-text-main);
      background-color: var(--color-bg-light);
      line-height: 1.7;
      letter-spacing: -0.01em;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

    .container {
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部复合导航 */
    .top-bar {
      background-color: #F1F5F9;
      border-bottom: 1px solid var(--color-border);
      font-size: 13px;
      color: var(--color-text-muted);
      padding: 7px 0;
    }

    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .top-bar-links a {
      margin-left: 18px;
      color: var(--color-text-muted);
    }
    .top-bar-links a:hover {
      color: var(--color-primary);
    }

    .main-nav-wrapper {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--color-border);
      transition: all 0.3s ease;
    }

    .main-nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
    }

    .nav-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 800;
      color: var(--color-primary);
    }

    .logo-badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      background: var(--color-primary);
      color: var(--color-accent-green);
      border-radius: var(--radius-sm);
      font-weight: 900;
      font-size: 18px;
    }

    .nav-menu {
      display: flex;
      list-style: none;
      align-items: center;
      gap: 32px;
    }

    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--color-text-sub);
      position: relative;
      padding: 6px 0;
    }

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

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0%;
      height: 2px;
      background-color: var(--color-accent-green);
      transition: width 0.25s ease;
    }

    .nav-link:hover::after {
      width: 100%;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 11px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      cursor: pointer;
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      white-space: nowrap;
      min-height: 44px;
    }

    .btn-primary {
      background-color: var(--color-primary);
      color: #FFFFFF;
      border-color: var(--color-primary);
    }

    .btn-primary:hover {
      background-color: var(--color-primary-light);
      box-shadow: 0 8px 20px -4px rgba(15, 23, 42, 0.25);
      transform: translateY(-1px);
    }

    .btn-accent {
      background-color: var(--color-accent-orange);
      color: #FFFFFF;
    }

    .btn-accent:hover {
      background-color: #EA580C;
      box-shadow: 0 8px 20px -4px rgba(249, 115, 22, 0.35);
      transform: translateY(-1px);
    }

    .btn-outline {
      background-color: transparent;
      border-color: var(--color-border);
      color: var(--color-text-main);
    }

    .btn-outline:hover {
      border-color: var(--color-primary);
      background-color: #F8FAFC;
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      width: 44px;
      height: 44px;
      cursor: pointer;
      flex-direction: column;
      justify-content: center;
      gap: 5px;
      padding: 10px;
    }

    .mobile-toggle span {
      display: block;
      width: 100%;
      height: 2px;
      background: var(--color-primary);
      transition: all 0.3s;
    }

    /* 板块通用体系 */
    .section {
      padding: 96px 0;
      position: relative;
    }

    .section-light {
      background-color: var(--color-bg-white);
    }

    .section-slate {
      background-color: var(--color-bg-light);
    }

    .section-dark {
      background-color: var(--color-bg-dark);
      color: #F8FAFC;
    }

    .section-header {
      margin-bottom: 56px;
    }

    .section-header.text-center {
      text-align: center;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      font-size: 13px;
      font-weight: 600;
      border-radius: 999px;
      background: rgba(0, 213, 152, 0.12);
      color: var(--color-accent-green-dark);
      margin-bottom: 14px;
      border: 1px solid rgba(0, 213, 152, 0.25);
    }

    .section-dark .badge-tag {
      background: rgba(0, 213, 152, 0.2);
      color: var(--color-accent-green);
      border-color: rgba(0, 213, 152, 0.3);
    }

    .section-title {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--color-primary);
      letter-spacing: -0.02em;
      margin-bottom: 16px;
    }

    .section-dark .section-title {
      color: #FFFFFF;
    }

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

    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* 01. 首屏文档与问题解决式 Hero (#hero) */
    .hero-section {
      padding: 80px 0 100px;
      background: radial-gradient(1000px 500px at 50% 0%, rgba(0, 213, 152, 0.08), transparent 70%), var(--color-bg-white);
      border-bottom: 1px solid var(--color-border);
      position: relative;
    }

    .hero-content {
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
    }

    .hero-title {
      font-size: 48px;
      font-weight: 800;
      line-height: 1.18;
      color: var(--color-primary);
      margin-bottom: 20px;
      letter-spacing: -0.03em;
    }

    .hero-lead {
      font-size: 17px;
      color: var(--color-text-sub);
      line-height: 1.8;
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-search-box {
      max-width: 660px;
      margin: 0 auto 24px;
      display: flex;
      background: #FFFFFF;
      border: 2px solid var(--color-primary);
      border-radius: var(--radius-md);
      box-shadow: 0 16px 36px -10px rgba(15, 23, 42, 0.08);
      overflow: hidden;
      padding: 4px;
    }

    .hero-search-input {
      flex: 1;
      border: none;
      padding: 12px 18px;
      font-size: 16px;
      outline: none;
      color: var(--color-primary);
    }

    .hero-chips-wrap {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      align-items: center;
      gap: 10px;
      margin-bottom: 44px;
      font-size: 13px;
    }

    .chip-label {
      color: var(--color-text-muted);
      font-weight: 600;
    }

    .chip-item {
      padding: 6px 14px;
      background: #F1F5F9;
      border-radius: 999px;
      color: var(--color-text-main);
      border: 1px solid var(--color-border);
      transition: all 0.2s ease;
    }

    .chip-item:hover {
      background: #FFFFFF;
      border-color: var(--color-accent-green);
      color: var(--color-accent-green-dark);
      transform: translateY(-1px);
    }

    .hero-preview-board {
      margin-top: 20px;
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-hover);
      border: 1px solid var(--color-border);
      background-color: #FFFFFF;
    }

    .hero-float-card {
      position: absolute;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(8px);
      padding: 14px 20px;
      border-radius: var(--radius-md);
      box-shadow: 0 14px 30px -8px rgba(15, 23, 42, 0.15);
      border: 1px solid var(--color-border);
      text-align: left;
    }

    .hero-float-1 {
      top: 30px;
      left: 30px;
    }

    .hero-float-2 {
      bottom: 30px;
      right: 30px;
    }

    .float-card-num {
      font-size: 24px;
      font-weight: 800;
      color: var(--color-accent-green-dark);
      font-feature-settings: "tnum";
    }

    .float-card-txt {
      font-size: 12px;
      color: var(--color-text-muted);
      font-weight: 500;
    }

    /* 02. 问题陈述与行业合规 (#intro) */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .intro-specs {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 32px;
    }

    .spec-item {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      padding: 18px 16px;
      border-radius: var(--radius-md);
      border-top: 3px solid var(--color-accent-green);
    }

    .spec-num {
      font-size: 20px;
      font-weight: 800;
      color: var(--color-primary);
      margin-bottom: 4px;
    }

    .spec-txt {
      font-size: 13px;
      color: var(--color-text-muted);
    }

    /* 03. 核心优势六卡片 (#advantage) */
    .grid-3-col {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .card-pro {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      position: relative;
    }

    .card-pro:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(0, 213, 152, 0.4);
    }

    .card-icon {
      width: 52px;
      height: 52px;
      background: #F1F5F9;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 22px;
      font-size: 22px;
      color: var(--color-primary);
    }

    .card-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 12px;
    }

    .card-desc {
      font-size: 14.5px;
      color: var(--color-text-sub);
      line-height: 1.7;
    }

    /* 04. 服务矩阵三大核心端 (#matrix) */
    .matrix-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      position: relative;
      display: flex;
      flex-direction: column;
    }

    .matrix-header {
      padding-bottom: 20px;
      border-bottom: 1px solid var(--color-border);
      margin-bottom: 24px;
    }

    .matrix-role {
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      color: var(--color-accent-green-dark);
      letter-spacing: 0.05em;
      margin-bottom: 6px;
    }

    .matrix-title {
      font-size: 22px;
      font-weight: 800;
      color: var(--color-primary);
    }

    .matrix-list {
      list-style: none;
      margin-bottom: 28px;
      flex: 1;
    }

    .matrix-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 16px;
      font-size: 14.5px;
      color: var(--color-text-sub);
    }

    .matrix-check {
      color: var(--color-accent-green-dark);
      font-weight: bold;
      font-size: 16px;
      line-height: 1.4;
    }

    /* 05. 深色沉浸式案例与运营理念 (#concept) */
    .concept-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      margin-top: 48px;
    }

    .concept-card {
      background: #111827;
      border: 1px solid var(--color-border-dark);
      border-radius: var(--radius-lg);
      padding: 36px;
      position: relative;
      overflow: hidden;
    }

    .concept-card.highlight {
      border-color: rgba(0, 213, 152, 0.4);
      background: linear-gradient(180deg, #111827 0%, rgba(15, 23, 42, 0.8) 100%);
    }

    .concept-tag {
      display: inline-block;
      padding: 4px 10px;
      background: rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-sm);
      font-size: 12px;
      color: var(--color-accent-green);
      margin-bottom: 18px;
    }

    /* 06. 效能对比看板 (#contrast) */
    .contrast-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    .contrast-box {
      border-radius: var(--radius-lg);
      padding: 36px;
    }

    .contrast-legacy {
      background: #F1F5F9;
      border: 1px dashed #CBD5E1;
    }

    .contrast-modern {
      background: #FFFFFF;
      border: 2px solid var(--color-accent-green-dark);
      box-shadow: 0 16px 36px -10px rgba(0, 213, 152, 0.15);
    }

    .contrast-box-title {
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .contrast-row {
      display: flex;
      justify-content: space-between;
      padding: 16px 0;
      border-bottom: 1px solid var(--color-border);
      font-size: 14.5px;
    }

    .contrast-row:last-child {
      border-bottom: none;
    }

    .contrast-label {
      color: var(--color-text-muted);
      font-weight: 500;
    }

    .contrast-val-bad {
      color: #94A3B8;
      font-weight: 600;
    }

    .contrast-val-good {
      color: var(--color-accent-green-dark);
      font-weight: 700;
    }

    /* 07. 典型体育场馆故事 (#stories) */
    .story-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: grid;
      grid-template-columns: 380px 1fr;
      margin-bottom: 30px;
      box-shadow: var(--shadow-soft);
    }

    .story-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .story-body {
      padding: 36px 40px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    /* 08. 关键运营效能数据条 (#stats) */
    .stats-bar {
      background: #FFFFFF;
      border-top: 1px solid var(--color-border);
      border-bottom: 1px solid var(--color-border);
      padding: 60px 0;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }

    .stat-metric {
      font-size: 46px;
      font-weight: 900;
      color: var(--color-primary);
      line-height: 1;
      margin-bottom: 10px;
      font-feature-settings: "tnum";
    }

    .stat-metric-unit {
      font-size: 24px;
      font-weight: 600;
      color: var(--color-accent-green-dark);
    }

    .stat-note {
      font-size: 14px;
      color: var(--color-text-muted);
      font-weight: 500;
    }

    /* 09. 用户评价体验区 (#reviews) */
    .review-bubble {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      padding: 30px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-stars {
      color: #FBBF24;
      font-size: 14px;
      margin-bottom: 14px;
    }

    .review-text {
      font-size: 15px;
      color: var(--color-text-sub);
      line-height: 1.7;
      margin-bottom: 20px;
      flex: 1;
    }

    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--color-border);
      padding-top: 16px;
    }

    .reviewer-avatar {
      width: 42px;
      height: 42px;
      background: #E2E8F0;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--color-primary);
      font-size: 14px;
    }

    .reviewer-name {
      font-size: 14.5px;
      font-weight: 700;
      color: var(--color-primary);
    }

    .reviewer-role {
      font-size: 12.5px;
      color: var(--color-text-muted);
    }

    /* 10. 资讯列表 (#news) */
    .news-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }

    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    .news-card-media {
      height: 190px;
      overflow: hidden;
      position: relative;
    }

    .news-card-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .news-card:hover .news-card-media img {
      transform: scale(1.04);
    }

    .news-card-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .news-date {
      font-size: 12.5px;
      color: var(--color-text-muted);
      margin-bottom: 8px;
    }

    .news-card-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .news-card-desc {
      font-size: 14px;
      color: var(--color-text-sub);
      line-height: 1.6;
      margin-bottom: 18px;
      flex: 1;
    }

    /* 11. 安全保障区 (#security) */
    .grid-4-col {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .security-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      padding: 26px 22px;
      text-align: center;
    }

    .security-icon {
      width: 48px;
      height: 48px;
      background: rgba(0, 213, 152, 0.1);
      color: var(--color-accent-green-dark);
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 16px;
    }

    .security-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 8px;
    }

    .security-desc {
      font-size: 13.5px;
      color: var(--color-text-muted);
      line-height: 1.6;
    }

    /* 12. 快速排课交互解答区 (#qa-interactive) */
    .tab-nav {
      display: flex;
      justify-content: center;
      gap: 12px;
      margin-bottom: 36px;
    }

    .tab-btn {
      padding: 10px 24px;
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: 999px;
      font-size: 14.5px;
      font-weight: 600;
      color: var(--color-text-sub);
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .tab-btn.active, .tab-btn:hover {
      background: var(--color-primary);
      color: #FFFFFF;
      border-color: var(--color-primary);
    }

    .tab-pane {
      display: none;
      animation: fadeIn 0.3s ease-in-out;
    }

    .tab-pane.active {
      display: block;
    }

    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(6px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .solution-card {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 36px 40px;
      box-shadow: var(--shadow-soft);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }

    /* 13. 常见问题手风琴 (#faq) */
    .faq-container {
      max-width: 820px;
      margin: 0 auto;
    }

    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color 0.2s ease;
    }

    .faq-item:hover {
      border-color: #CBD5E1;
    }

    .faq-trigger {
      width: 100%;
      padding: 20px 24px;
      text-align: left;
      background: none;
      border: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 16.5px;
      font-weight: 700;
      color: var(--color-primary);
    }

    .faq-icon {
      font-size: 20px;
      color: var(--color-text-muted);
      transition: transform 0.25s ease;
    }

    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0.16, 1, 0.3, 1), padding 0.3s ease;
      background: #F8FAFC;
    }

    .faq-item.active .faq-body {
      max-height: 200px;
      padding: 0 24px 20px;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--color-primary);
    }

    .faq-answer {
      font-size: 14.5px;
      color: var(--color-text-sub);
      line-height: 1.75;
    }

    /* 14. 试用申请转化区 (#contact) */
    .contact-card {
      background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
      border-radius: var(--radius-lg);
      padding: 56px 60px;
      color: #FFFFFF;
      display: grid;
      grid-template-columns: 1.1fr 1fr;
      gap: 50px;
      box-shadow: var(--shadow-hover);
    }

    .contact-perks-list {
      list-style: none;
      margin-top: 24px;
    }

    .contact-perk-item {
      display: flex;
      gap: 12px;
      margin-bottom: 16px;
      font-size: 15px;
      color: #CBD5E1;
    }

    .contact-perk-item span {
      color: var(--color-accent-green);
      font-weight: bold;
    }

    .lead-form {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 32px;
      color: var(--color-primary);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 13.5px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--color-text-main);
    }

    .form-input, .form-select {
      width: 100%;
      height: 44px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      padding: 0 14px;
      font-size: 14px;
      font-family: inherit;
      outline: none;
      transition: border-color 0.2s ease;
      background: #FFFFFF;
    }

    .form-input:focus, .form-select:focus {
      border-color: var(--color-primary);
    }

    .form-privacy-note {
      font-size: 12px;
      color: var(--color-text-muted);
      margin-top: 14px;
      text-align: center;
      line-height: 1.5;
    }

    /* 全局页脚 */
    .site-footer {
      background-color: var(--color-bg-dark);
      border-top: 1px solid #1E293B;
      color: #94A3B8;
      padding: 70px 0 30px;
      font-size: 14px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 48px;
      margin-bottom: 50px;
    }

    .footer-brand-title {
      font-size: 18px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 16px;
    }

    .footer-desc {
      font-size: 13.5px;
      line-height: 1.8;
      color: #64748B;
      margin-bottom: 20px;
    }

    .footer-heading {
      font-size: 15px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 20px;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 12px;
    }

    .footer-links a:hover {
      color: var(--color-accent-green);
    }

    .footer-contact-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      margin-bottom: 14px;
      font-size: 13.5px;
    }

    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 26px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12.5px;
      color: #64748B;
    }

    .footer-bottom a {
      color: #64748B;
    }

    .footer-bottom a:hover {
      color: #94A3B8;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-title { font-size: 38px; }
      .grid-3-col { grid-template-columns: repeat(2, 1fr); }
      .grid-4-col { grid-template-columns: repeat(2, 1fr); }
      .intro-grid { grid-template-columns: 1fr; gap: 40px; }
      .concept-grid { grid-template-columns: 1fr; }
      .contrast-wrapper { grid-template-columns: 1fr; }
      .contact-card { grid-template-columns: 1fr; padding: 40px 30px; }
      .story-card { grid-template-columns: 1fr; }
      .story-media { height: 240px; }
      .solution-card { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 36px; }
    }

    @media (max-width: 768px) {
      .top-bar { display: none; }
      .mobile-toggle { display: flex; }
      .nav-menu {
        display: none;
        position: absolute;
        top: 74px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 16px 30px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--color-border);
        gap: 18px;
        align-items: flex-start;
      }
      .nav-menu.show { display: flex; }
      .hero-title { font-size: 30px; }
      .hero-search-box { flex-direction: column; border: none; padding: 0; }
      .hero-search-input { border: 1px solid var(--color-border); border-radius: var(--radius-sm); margin-bottom: 8px; }
      .hero-float-card { display: none; }
      .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
      .grid-3-col { grid-template-columns: 1fr; }
      .grid-4-col { grid-template-columns: 1fr; }
      .section { padding: 64px 0; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
    }

    @media (max-width: 480px) {
      .hero-title { font-size: 26px; }
      .stat-metric { font-size: 34px; }
      .intro-specs { grid-template-columns: 1fr; }
    }