/* roulang page: index */
:root {
      --primary: #0F2F2E;
      --primary-light: #184745;
      --accent: #E28743;
      --accent-hover: #cf7330;
      --dark-obsidian: #091312;
      --dark-surface: #121F1E;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-subtle: rgba(15, 23, 42, 0.08);
      --border-dark: rgba(255, 255, 255, 0.1);
      --radius-sm: 6px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 12px rgba(15, 47, 46, 0.08);
      --shadow-lg: 0 10px 25px -5px rgba(15, 47, 46, 0.12);
      --font-main: "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
      --font-num: "DIN Alternate", "Montserrat", sans-serif;
      --transition-smooth: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

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

    body {
      font-family: var(--font-main);
      color: var(--text-body);
      background-color: var(--bg-light);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

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

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

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部微型信息条 */
    .top-bar {
      background-color: #081D1C;
      color: #94A3B8;
      font-size: 0.8125rem;
      border-bottom: 1px solid rgba(255,255,255,0.06);
      padding: 6px 0;
    }
    .top-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-left, .top-bar-right {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .badge-iso {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      color: #38BDF8;
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-subtle);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.02em;
    }
    .brand-logo-icon {
      width: 38px;
      height: 38px;
      background: var(--primary);
      color: #FFF;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
      font-weight: bold;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-link {
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-body);
      position: relative;
      padding: 8px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: var(--transition-smooth);
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .nav-action {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .btn-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background-color: var(--accent);
      color: #FFF;
      font-weight: 600;
      font-size: 0.9375rem;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      min-height: 44px;
      box-shadow: 0 2px 6px rgba(226, 135, 67, 0.3);
      cursor: pointer;
    }
    .btn-cta:hover {
      background-color: var(--accent-hover);
      transform: translateY(-1px);
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: transparent;
      color: var(--primary);
      border: 1px solid var(--primary);
      font-weight: 600;
      font-size: 0.9375rem;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      min-height: 44px;
      cursor: pointer;
    }
    .btn-secondary:hover {
      background: rgba(15, 47, 46, 0.05);
    }

    /* 板块通用基础 */
    .section-spacing {
      padding: 88px 0;
    }
    .section-title-wrap {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 56px auto;
    }
    .section-badge {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 12px;
      background: rgba(226, 135, 67, 0.1);
      padding: 4px 12px;
      border-radius: 99px;
    }
    .section-h2 {
      font-size: 2.25rem;
      line-height: 1.3;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .section-p {
      font-size: 1.0625rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 板块一：Hero 首屏高转化看板（包含推荐选型前置） */
    .hero-section {
      position: relative;
      background: #091918;
      background-image: linear-gradient(135deg, rgba(9, 25, 24, 0.95), rgba(15, 47, 46, 0.92)), url('/assets/images/99218956bb8ce71c.jpg');
      background-size: cover;
      background-position: center;
      color: #FFF;
      padding: 96px 0 108px 0;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 3rem;
      line-height: 1.25;
      font-weight: 700;
      margin-bottom: 24px;
      letter-spacing: -0.01em;
    }
    .hero-content h1 span {
      color: var(--accent);
    }
    .hero-lead {
      font-size: 1.125rem;
      line-height: 1.75;
      color: #CBD5E1;
      margin-bottom: 36px;
    }
    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }
    .hero-metric-row {
      display: flex;
      gap: 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      padding-top: 24px;
    }
    .hero-metric-item strong {
      font-family: var(--font-num);
      font-size: 1.75rem;
      color: #F8FAFC;
      display: block;
      font-weight: 700;
    }
    .hero-metric-item span {
      font-size: 0.8125rem;
      color: #94A3B8;
    }

    /* 首屏推荐选型高亮卡片 */
    .hero-selection-card {
      background: rgba(255, 255, 255, 0.05);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(226, 135, 67, 0.4);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.3);
      position: relative;
    }
    .hero-card-tag {
      position: absolute;
      top: -14px;
      right: 24px;
      background: var(--accent);
      color: #FFF;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 4px;
    }
    .hero-selection-title {
      font-size: 1.35rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: #FFF;
    }
    .hero-selection-desc {
      font-size: 0.875rem;
      color: #94A3B8;
      margin-bottom: 20px;
    }
    .hero-plan-price {
      font-family: var(--font-num);
      font-size: 2.2rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 20px;
    }
    .hero-plan-price small {
      font-size: 0.875rem;
      color: #94A3B8;
      font-weight: 400;
    }
    .hero-plan-list {
      list-style: none;
      margin-bottom: 28px;
    }
    .hero-plan-list li {
      font-size: 0.875rem;
      color: #E2E8F0;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .hero-plan-list li::before {
      content: '✓';
      color: var(--accent);
      font-weight: bold;
    }

    /* 板块二：品牌与产品介绍区（底层架构与可信度） */
    .about-section {
      background-color: var(--bg-white);
    }
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .about-visual {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-subtle);
    }
    .about-visual img {
      width: 100%;
      height: 420px;
      object-fit: cover;
    }
    .about-content h3 {
      font-size: 1.85rem;
      line-height: 1.35;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 20px;
    }
    .about-content p {
      font-size: 1rem;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 18px;
    }
    .about-spec-box {
      background: var(--bg-light);
      border-left: 4px solid var(--primary);
      padding: 16px 20px;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      margin-top: 24px;
    }
    .about-spec-box strong {
      display: block;
      color: var(--primary);
      font-size: 0.9375rem;
      margin-bottom: 4px;
    }
    .about-spec-box span {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* 板块三：核心优势矩阵区 (Grid 3x2) */
    .advantages-section {
      background-color: var(--bg-light);
    }
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .adv-card {
      background: var(--bg-white);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      position: relative;
      transition: var(--transition-smooth);
    }
    .adv-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(15, 47, 46, 0.2);
    }
    .adv-num {
      font-family: var(--font-num);
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 16px;
      display: block;
    }
    .adv-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .adv-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 板块四：热门产品/核心业务功能区 (3列大型交互卡片) */
    .features-section {
      background: var(--bg-white);
    }
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }
    .feature-card {
      background: var(--bg-white);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: var(--transition-smooth);
    }
    .feature-card:hover {
      box-shadow: var(--shadow-lg);
      border-color: rgba(15, 47, 46, 0.25);
    }
    .feature-img-wrap {
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .feature-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition-smooth);
    }
    .feature-card:hover .feature-img-wrap img {
      transform: scale(1.05);
    }
    .feature-badge {
      position: absolute;
      top: 16px;
      left: 16px;
      background: var(--primary);
      color: #FFF;
      font-size: 0.75rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 4px;
    }
    .feature-body {
      padding: 28px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .feature-h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .feature-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.6;
    }
    .feature-checklist {
      list-style: none;
      margin-bottom: 24px;
      flex-grow: 1;
    }
    .feature-checklist li {
      font-size: 0.875rem;
      color: var(--text-body);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .feature-checklist li::before {
      content: '✓';
      color: #10B981;
      font-weight: bold;
    }

    /* 板块五：深色对比理念与数字化架构区 */
    .arch-section {
      background: var(--dark-obsidian);
      color: #FFF;
      position: relative;
    }
    .arch-header h2 {
      color: #FFF;
    }
    .arch-header p {
      color: #94A3B8;
    }
    .arch-topology {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      margin-top: 48px;
    }
    .arch-col {
      background: var(--dark-surface);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 36px;
    }
    .arch-col.current {
      border-color: var(--accent);
      box-shadow: 0 0 20px rgba(226, 135, 67, 0.15);
    }
    .arch-col-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .arch-col-title.negative {
      color: #F87171;
    }
    .arch-col-title.positive {
      color: var(--accent);
    }
    .arch-list {
      list-style: none;
    }
    .arch-list-item {
      padding: 14px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .arch-list-item:last-child {
      border-bottom: none;
    }
    .arch-item-name {
      font-weight: 600;
      font-size: 0.95rem;
      margin-bottom: 4px;
    }
    .arch-item-detail {
      font-size: 0.85rem;
      color: #94A3B8;
    }

    /* 板块六：典型客户故事与场景落地区 */
    .stories-section {
      background: var(--bg-light);
    }
    .story-card {
      background: var(--bg-white);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: grid;
      grid-template-columns: 1fr 1fr;
      margin-bottom: 36px;
      box-shadow: var(--shadow-sm);
    }
    .story-card:last-child {
      margin-bottom: 0;
    }
    .story-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .story-body {
      padding: 40px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .story-brand {
      font-size: 0.8125rem;
      font-weight: 700;
      color: var(--accent);
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .story-title {
      font-size: 1.45rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 20px;
    }
    .story-step {
      margin-bottom: 16px;
    }
    .story-step-label {
      font-weight: 700;
      font-size: 0.875rem;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .story-step-text {
      font-size: 0.9rem;
      color: var(--text-body);
      line-height: 1.6;
    }

    /* 板块七：关键数据统计条 */
    .metrics-section {
      background: var(--primary);
      color: #FFF;
      padding: 60px 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-data-item strong {
      font-family: var(--font-num);
      font-size: 3rem;
      font-weight: 700;
      color: var(--accent);
      display: block;
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .metric-data-item span {
      font-size: 0.95rem;
      color: #E2E8F0;
      font-weight: 500;
    }

    /* 板块八：多角色用户评价区 (Quote Style) */
    .reviews-section {
      background: var(--bg-white);
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .review-card {
      background: var(--bg-light);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-stars {
      color: #F59E0B;
      font-size: 1.1rem;
      margin-bottom: 16px;
      letter-spacing: 2px;
    }
    .review-content {
      font-size: 0.925rem;
      line-height: 1.7;
      color: var(--text-body);
      margin-bottom: 24px;
      font-style: italic;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid var(--border-subtle);
      padding-top: 16px;
    }
    .review-avatar-char {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: #FFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }
    .review-meta strong {
      display: block;
      font-size: 0.95rem;
      color: var(--text-main);
    }
    .review-meta span {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 板块九：最新资讯与行业深度洞察区 */
    .insights-section {
      background: var(--bg-light);
    }
    .insights-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .insight-card {
      background: var(--bg-white);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      flex-direction: column;
      transition: var(--transition-smooth);
    }
    .insight-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .insight-date {
      font-size: 0.8125rem;
      color: var(--accent);
      font-weight: 600;
      margin-bottom: 12px;
      display: inline-block;
    }
    .insight-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.4;
    }
    .insight-excerpt {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      flex-grow: 1;
    }
    .insight-link {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 板块十：异议拆解与 FAQ 手风琴区 */
    .faq-section {
      background: var(--bg-white);
    }
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
      background: var(--bg-white);
    }
    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #FAFAFA;
      user-select: none;
    }
    .faq-icon {
      font-size: 1.25rem;
      color: var(--accent);
      transition: var(--transition-smooth);
    }
    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out, padding 0.3s ease;
      font-size: 0.925rem;
      color: var(--text-body);
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      padding: 20px 24px;
      max-height: 250px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    /* 板块十一：权威背书与服务保障条 */
    .guarantee-section {
      background: #F1F5F9;
      border-top: 1px solid var(--border-subtle);
      border-bottom: 1px solid var(--border-subtle);
      padding: 50px 0;
    }
    .guarantee-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .guarantee-item {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .guarantee-icon {
      width: 48px;
      height: 48px;
      background: var(--bg-white);
      border: 1px solid var(--border-subtle);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      color: var(--primary);
      flex-shrink: 0;
    }
    .guarantee-title {
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--text-main);
      margin-bottom: 2px;
    }
    .guarantee-desc {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    /* 板块十二：底部转化表单与固定留资区 */
    .convert-section {
      background: linear-gradient(135deg, #091312 0%, #0F2F2E 100%);
      color: #FFF;
      padding: 88px 0;
    }
    .convert-card {
      max-width: 760px;
      margin: 0 auto;
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      padding: 44px;
      color: var(--text-body);
      box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
    }
    .convert-card h3 {
      font-size: 1.75rem;
      font-weight: 700;
      color: var(--text-main);
      text-align: center;
      margin-bottom: 8px;
    }
    .convert-card p {
      font-size: 0.9375rem;
      color: var(--text-muted);
      text-align: center;
      margin-bottom: 32px;
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 24px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .form-group.full-width {
      grid-column: span 2;
    }
    .form-label {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
    }
    .form-input, .form-select {
      height: 46px;
      padding: 0 14px;
      border: 1px solid #CBD5E1;
      border-radius: var(--radius-sm);
      font-size: 0.9375rem;
      outline: none;
      transition: var(--transition-smooth);
      font-family: inherit;
    }
    .form-input:focus, .form-select:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(15, 47, 46, 0.1);
    }
    .btn-submit {
      width: 100%;
      height: 48px;
      background: var(--accent);
      color: #FFF;
      border: none;
      border-radius: var(--radius-sm);
      font-size: 1.05rem;
      font-weight: 700;
      cursor: pointer;
      transition: var(--transition-smooth);
    }
    .btn-submit:hover {
      background: var(--accent-hover);
    }
    .form-privacy-note {
      font-size: 0.75rem;
      color: var(--text-muted);
      text-align: center;
      margin-top: 14px;
    }

    /* 移动端底部悬浮转化条 */
    .mobile-sticky-bar {
      display: none;
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      z-index: 999;
      background: #FFFFFF;
      border-top: 1px solid var(--border-subtle);
      padding: 10px 16px;
      box-shadow: 0 -4px 12px rgba(0,0,0,0.08);
      gap: 12px;
    }
    .mobile-sticky-bar a {
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      height: 42px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.9rem;
    }
    .btn-call {
      background: var(--primary);
      color: #FFF;
    }
    .btn-reserve {
      background: var(--accent);
      color: #FFF;
    }

    /* 页脚规范 */
    .site-footer {
      background: #081413;
      color: #94A3B8;
      padding: 72px 0 28px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1.5fr;
      gap: 48px;
      margin-bottom: 56px;
    }
    .footer-brand h4 {
      font-size: 1.25rem;
      font-weight: 700;
      color: #FFF;
      margin-bottom: 16px;
    }
    .footer-brand p {
      font-size: 0.875rem;
      line-height: 1.7;
      color: #94A3B8;
    }
    .footer-links h5, .footer-contact h5 {
      font-size: 1rem;
      font-weight: 600;
      color: #FFF;
      margin-bottom: 18px;
    }
    .footer-nav-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-nav-list a {
      font-size: 0.875rem;
      color: #94A3B8;
    }
    .footer-nav-list a:hover {
      color: var(--accent);
    }
    .footer-contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 0.875rem;
    }
    .footer-contact-list li strong {
      color: #CBD5E1;
    }
    .footer-bottom-bar {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      text-align: center;
      font-size: 0.8125rem;
      color: #64748B;
    }

    /* 移动端汉堡包菜单样式 */
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
      color: var(--primary);
    }
    .mobile-menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--primary);
      margin: 5px 0;
      transition: var(--transition-smooth);
    }

    /* 响应式断点处理 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .advantages-grid, .features-grid, .reviews-grid, .insights-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .guarantee-grid, .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFF;
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-subtle);
        gap: 16px;
      }
      .nav-menu.open {
        display: flex;
      }
      .nav-action .btn-cta {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .section-spacing {
        padding: 60px 0;
      }
      .hero-content h1 {
        font-size: 2.2rem;
      }
      .section-h2 {
        font-size: 1.8rem;
      }
      .about-grid, .arch-topology, .story-card {
        grid-template-columns: 1fr;
      }
      .advantages-grid, .features-grid, .reviews-grid, .insights-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid, .guarantee-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
      }
      .convert-card {
        padding: 24px;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full-width {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .mobile-sticky-bar {
        display: flex;
      }
      body {
        padding-bottom: 60px;
      }
    }