/* roulang page: index */
:root {
      --color-primary: #0B192C;
      --color-primary-light: #1E3E62;
      --color-accent: #FF6B00;
      --color-accent-hover: #E05E00;
      --color-bg-base: #F8F9FA;
      --color-bg-card: #FFFFFF;
      --color-bg-dark: #121820;
      --color-text-main: #0F172A;
      --color-text-body: #334155;
      --color-text-muted: #64748B;
      --color-border: #E2E8F0;
      --color-border-dark: #263342;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 12px 32px -4px rgba(15, 23, 42, 0.12);
      --container-max: 1280px;
      --transition: all 0.25s ease-in-out;
    }

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

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

    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-body);
      background-color: var(--color-bg-base);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

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

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    /* 顶部服务条 */
    .top-bar {
      background-color: #070F1A;
      color: #94A3B8;
      font-size: 0.825rem;
      padding: 0.5rem 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-left, .top-bar-right {
      display: flex;
      align-items: center;
      gap: 1.25rem;
    }

    /* 导航栏 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(8px);
      box-shadow: 0 1px 10px rgba(0, 0, 0, 0.06);
    }
    .header-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--color-primary);
      letter-spacing: -0.5px;
    }
    .logo-badge {
      display: inline-block;
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
      border-radius: var(--radius-sm);
      color: #FFFFFF;
      text-align: center;
      line-height: 32px;
      font-size: 1.1rem;
      font-weight: 900;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 1.85rem;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--color-text-main);
      padding: 0.35rem 0;
      position: relative;
    }
    .nav-link:hover {
      color: var(--color-accent);
    }
    .nav-link::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--color-accent);
      transition: var(--transition);
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .nav-cta {
      background-color: var(--color-accent);
      color: #FFFFFF !important;
      padding: 0.6rem 1.35rem;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.9rem;
      box-shadow: 0 4px 12px rgba(255, 107, 0, 0.25);
    }
    .nav-cta:hover {
      background-color: var(--color-accent-hover);
      transform: translateY(-1px);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--color-text-main);
      cursor: pointer;
    }

    /* 按钮样式 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.85rem 1.8rem;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.95rem;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      gap: 0.5rem;
    }
    .btn-accent {
      background-color: var(--color-accent);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(255, 107, 0, 0.25);
    }
    .btn-accent:hover {
      background-color: var(--color-accent-hover);
      box-shadow: 0 6px 18px rgba(255, 107, 0, 0.35);
      transform: translateY(-2px);
    }
    .btn-outline-white {
      background-color: transparent;
      border-color: rgba(255, 255, 255, 0.35);
      color: #FFFFFF;
    }
    .btn-outline-white:hover {
      background-color: rgba(255, 255, 255, 0.1);
      border-color: #FFFFFF;
      transform: translateY(-2px);
    }
    .btn-outline-dark {
      background-color: transparent;
      border-color: var(--color-border);
      color: var(--color-text-main);
    }
    .btn-outline-dark:hover {
      border-color: var(--color-primary);
      color: var(--color-primary);
      background-color: rgba(11, 25, 44, 0.03);
    }

    /* 标题统一样式 */
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 3.5rem auto;
    }
    .section-tag {
      display: inline-block;
      color: var(--color-accent);
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      margin-bottom: 0.6rem;
      background: rgba(255, 107, 0, 0.08);
      padding: 0.25rem 0.75rem;
      border-radius: 4px;
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      color: var(--color-text-main);
      line-height: 1.3;
      margin-bottom: 1rem;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--color-text-muted);
      line-height: 1.7;
    }

    /* 板块通用间距 */
    .section-pad {
      padding: 5.5rem 0;
    }
    .bg-white {
      background-color: #FFFFFF;
    }
    .bg-slate {
      background-color: var(--color-bg-base);
    }
    .bg-dark {
      background-color: var(--color-bg-dark);
      color: #F1F5F9;
    }

    /* 1. Hero 优惠券墙与视差全屏首屏 */
    .hero-section {
      position: relative;
      background: linear-gradient(135deg, rgba(11, 25, 44, 0.92) 0%, rgba(18, 24, 32, 0.94) 100%),
                  url('/assets/images/5fe19f83b65f8bcc.webp') center/cover no-repeat;
      color: #FFFFFF;
      padding: 4.5rem 0 5rem;
    }
    .hero-wrapper {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 3.5rem;
      align-items: center;
    }
    .hero-tagline {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      background-color: rgba(255, 107, 0, 0.2);
      border: 1px solid rgba(255, 107, 0, 0.4);
      color: #FFA04D;
      padding: 0.35rem 0.9rem;
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 1.5rem;
    }
    .hero-title {
      font-size: 2.9rem;
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: -0.5px;
      margin-bottom: 1.25rem;
    }
    .hero-desc {
      font-size: 1.05rem;
      color: #CBD5E1;
      line-height: 1.8;
      margin-bottom: 2rem;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      margin-bottom: 2rem;
    }
    .hero-trust-badges {
      display: flex;
      gap: 1.5rem;
      font-size: 0.85rem;
      color: #94A3B8;
      border-top: 1px solid rgba(255, 255, 255, 0.12);
      padding-top: 1.25rem;
    }

    /* 优惠券墙入口卡 */
    .coupon-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px dashed rgba(255, 107, 0, 0.5);
      border-radius: var(--radius-md);
      padding: 2rem;
      position: relative;
      backdrop-filter: blur(12px);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    }
    .coupon-header {
      border-bottom: 1px dashed rgba(255, 255, 255, 0.15);
      padding-bottom: 1.25rem;
      margin-bottom: 1.25rem;
    }
    .coupon-val {
      font-size: 2.8rem;
      font-weight: 900;
      color: #FF8533;
      line-height: 1;
    }
    .coupon-val span {
      font-size: 1.1rem;
      font-weight: 500;
      margin-right: 0.25rem;
    }
    .coupon-name {
      font-size: 1.15rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-top: 0.4rem;
    }
    .coupon-list {
      list-style: none;
      font-size: 0.9rem;
      color: #CBD5E1;
      margin-bottom: 1.5rem;
    }
    .coupon-list li {
      margin-bottom: 0.5rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    /* 2. KPI 看板数据条 */
    .metrics-bar {
      background-color: #0A1422;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding: 3rem 0;
      color: #FFFFFF;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
      text-align: center;
    }
    .metric-item {
      position: relative;
    }
    .metric-item:not(:last-child)::after {
      content: "";
      position: absolute;
      right: 0;
      top: 20%;
      height: 60%;
      width: 1px;
      background: rgba(255, 255, 255, 0.1);
    }
    .metric-number {
      font-size: 2.6rem;
      font-weight: 800;
      color: var(--color-accent);
      line-height: 1.1;
      margin-bottom: 0.4rem;
      font-feature-settings: "tnum";
    }
    .metric-unit {
      font-size: 1.1rem;
      font-weight: 600;
      color: #CBD5E1;
    }
    .metric-label {
      font-size: 0.95rem;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 0.25rem;
    }
    .metric-sub {
      font-size: 0.8rem;
      color: #94A3B8;
    }

    /* 3. 品牌与底盘技术解析 (brand-intro) */
    .tech-overview-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3.5rem;
      align-items: center;
    }
    .tech-image-wrap {
      position: relative;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--color-border);
    }
    .tech-feature-list {
      margin-top: 1.5rem;
      display: grid;
      gap: 1.25rem;
    }
    .tech-feature-item {
      display: flex;
      gap: 1rem;
    }
    .tech-icon-box {
      width: 44px;
      height: 44px;
      flex-shrink: 0;
      background: rgba(11, 25, 44, 0.05);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--color-primary);
      font-weight: 700;
      border: 1px solid var(--color-border);
    }
    .tech-feature-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--color-text-main);
      margin-bottom: 0.25rem;
    }
    .tech-feature-desc {
      font-size: 0.92rem;
      color: var(--color-text-muted);
      line-height: 1.6;
    }

    /* 4. 核心优势六宫格 (advantages) */
    .grid-3x2 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }
    .adv-card {
      background: #FFFFFF;
      padding: 2.25rem 1.75rem;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .adv-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(11, 25, 44, 0.25);
    }
    .adv-index {
      font-size: 0.85rem;
      font-weight: 800;
      color: var(--color-accent);
      margin-bottom: 0.75rem;
      display: block;
    }
    .adv-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--color-text-main);
      margin-bottom: 0.75rem;
    }
    .adv-text {
      font-size: 0.92rem;
      color: var(--color-text-muted);
      line-height: 1.65;
    }

    /* 5. 旗舰配送机器人矩阵 (products) */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .product-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .product-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: #CBD5E1;
    }
    .product-img {
      height: 220px;
      overflow: hidden;
      background-color: #EEF2F6;
    }
    .product-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .product-card:hover .product-img img {
      transform: scale(1.05);
    }
    .product-body {
      padding: 1.75rem;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .product-badge {
      align-self: flex-start;
      font-size: 0.75rem;
      font-weight: 700;
      background: rgba(11, 25, 44, 0.06);
      color: var(--color-primary);
      padding: 0.25rem 0.6rem;
      border-radius: 4px;
      margin-bottom: 0.75rem;
    }
    .product-name {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--color-text-main);
      margin-bottom: 0.5rem;
    }
    .product-desc {
      font-size: 0.9rem;
      color: var(--color-text-muted);
      line-height: 1.6;
      margin-bottom: 1.25rem;
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      margin-bottom: 1.5rem;
      font-size: 0.85rem;
    }
    .spec-table td {
      padding: 0.45rem 0;
      border-bottom: 1px solid #F1F5F9;
    }
    .spec-table td:first-child {
      color: var(--color-text-muted);
      width: 45%;
    }
    .spec-table td:last-child {
      font-weight: 600;
      color: var(--color-text-main);
      text-align: right;
    }

    /* 6. 硬核技术理念与架构深色区 (tech-specs) */
    .specs-dark-header {
      margin-bottom: 3rem;
      text-align: center;
    }
    .specs-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      margin-bottom: 3rem;
    }
    .spec-box {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--color-border-dark);
      border-radius: var(--radius-md);
      padding: 1.5rem;
      transition: var(--transition);
    }
    .spec-box:hover {
      background: rgba(255, 255, 255, 0.06);
      border-color: rgba(255, 107, 0, 0.5);
    }
    .spec-box-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 0.5rem;
    }
    .spec-box-text {
      font-size: 0.88rem;
      color: #94A3B8;
      line-height: 1.6;
    }
    .spec-diagram-card {
      background: #17202B;
      border: 1px solid var(--color-border-dark);
      border-radius: var(--radius-md);
      padding: 2.5rem;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 2.5rem;
      align-items: center;
    }
    .spec-diagram-content h3 {
      font-size: 1.5rem;
      font-weight: 800;
      margin-bottom: 1rem;
      color: #FFFFFF;
    }
    .spec-diagram-content p {
      font-size: 0.95rem;
      color: #CBD5E1;
      line-height: 1.7;
      margin-bottom: 1.5rem;
    }

    /* 7. 行业使用场景演练 (scenarios) */
    .scenario-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3.5rem;
      align-items: center;
      margin-bottom: 4rem;
    }
    .scenario-row:last-child {
      margin-bottom: 0;
    }
    .scenario-row.reverse {
      direction: rtl;
    }
    .scenario-row.reverse .scenario-content {
      direction: ltr;
    }
    .scenario-img-wrap {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }
    .scenario-badge {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--color-accent);
      margin-bottom: 0.5rem;
      display: inline-block;
    }
    .scenario-title {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--color-text-main);
      margin-bottom: 1rem;
    }
    .scenario-text {
      font-size: 0.95rem;
      color: var(--color-text-muted);
      line-height: 1.75;
      margin-bottom: 1.5rem;
    }
    .scenario-kpis {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 1rem;
    }
    .scenario-kpi-card {
      background: var(--color-bg-base);
      padding: 0.85rem 1.25rem;
      border-radius: var(--radius-sm);
      border-left: 3px solid var(--color-accent);
    }
    .scenario-kpi-val {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--color-text-main);
    }
    .scenario-kpi-lbl {
      font-size: 0.8rem;
      color: var(--color-text-muted);
    }

    /* 8. 落地标杆与成果对比 (stories) */
    .story-hero-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      display: grid;
      grid-template-columns: 1fr 1fr;
      margin-bottom: 2rem;
    }
    .story-img-container {
      min-height: 380px;
    }
    .story-img-container img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .story-content {
      padding: 3rem;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .story-label {
      color: var(--color-accent);
      font-weight: 700;
      font-size: 0.85rem;
      margin-bottom: 0.5rem;
    }
    .story-headline {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--color-text-main);
      margin-bottom: 1rem;
    }
    .story-desc {
      font-size: 0.95rem;
      color: var(--color-text-muted);
      line-height: 1.7;
      margin-bottom: 1.5rem;
    }
    .story-stats {
      display: flex;
      gap: 2rem;
      border-top: 1px solid var(--color-border);
      padding-top: 1.25rem;
    }
    .story-stat-num {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--color-primary);
    }
    .story-stat-txt {
      font-size: 0.8rem;
      color: var(--color-text-muted);
    }

    /* 9. 方案对比表 (我们 vs 传统方案) */
    .compare-container {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    .compare-table th, .compare-table td {
      padding: 1.25rem 1.5rem;
      border-bottom: 1px solid var(--color-border);
    }
    .compare-table th {
      background-color: #F8FAFC;
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--color-text-main);
    }
    .compare-table th.highlight-col {
      background-color: rgba(255, 107, 0, 0.08);
      color: var(--color-accent);
      font-weight: 800;
    }
    .compare-table td.highlight-col {
      background-color: rgba(255, 107, 0, 0.02);
      font-weight: 600;
      color: var(--color-primary);
    }

    /* 10. 客户真实评价墙 (reviews) */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }
    .review-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      padding: 2rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
    }
    .review-stars {
      color: #FFB800;
      font-size: 1.1rem;
      margin-bottom: 0.85rem;
      letter-spacing: 2px;
    }
    .review-text {
      font-size: 0.92rem;
      color: var(--color-text-body);
      line-height: 1.7;
      margin-bottom: 1.5rem;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 0.85rem;
      border-top: 1px solid #F1F5F9;
      padding-top: 1rem;
    }
    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--color-primary);
    }
    .review-user-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--color-text-main);
    }
    .review-user-title {
      font-size: 0.8rem;
      color: var(--color-text-muted);
    }

    /* 11. 行业动态与技术资讯 (news) */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .news-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .news-thumb {
      height: 190px;
      overflow: hidden;
    }
    .news-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-thumb img {
      transform: scale(1.05);
    }
    .news-body {
      padding: 1.5rem;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-meta {
      font-size: 0.8rem;
      color: var(--color-text-muted);
      margin-bottom: 0.5rem;
      display: flex;
      justify-content: space-between;
    }
    .news-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--color-text-main);
      margin-bottom: 0.75rem;
      line-height: 1.4;
    }
    .news-summary {
      font-size: 0.88rem;
      color: var(--color-text-muted);
      line-height: 1.6;
      margin-bottom: 1.25rem;
    }

    /* 12. 常见问题手风琴 (faq) */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }
    .faq-item {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--color-border);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-item summary {
      padding: 1.25rem 1.75rem;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--color-text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      list-style: none;
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-arrow {
      color: var(--color-accent);
      font-weight: 800;
      font-size: 1.2rem;
      transition: transform 0.25s ease;
    }
    .faq-item[open] .faq-arrow {
      transform: rotate(45deg);
    }
    .faq-content {
      padding: 0 1.75rem 1.5rem 1.75rem;
      font-size: 0.95rem;
      color: var(--color-text-muted);
      line-height: 1.75;
      border-top: 1px solid #F8FAFC;
    }

    /* 13. 底部选型测算与转化决策区 (consultation) */
    .cta-banner {
      background: linear-gradient(135deg, var(--color-primary) 0%, #162C46 100%);
      border-radius: var(--radius-lg);
      padding: 3.5rem;
      color: #FFFFFF;
      box-shadow: var(--shadow-lg);
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 3rem;
      align-items: center;
    }
    .cta-banner h2 {
      font-size: 2.1rem;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 1rem;
    }
    .cta-banner p {
      font-size: 1rem;
      color: #CBD5E1;
      line-height: 1.7;
      margin-bottom: 1.75rem;
    }
    .cta-form {
      background: #FFFFFF;
      padding: 2rem;
      border-radius: var(--radius-md);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    }
    .cta-form-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--color-text-main);
      margin-bottom: 1.25rem;
    }
    .form-group {
      margin-bottom: 1rem;
    }
    .form-control {
      width: 100%;
      height: 48px;
      padding: 0 1rem;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      color: var(--color-text-main);
      background-color: #F8FAFC;
      transition: var(--transition);
    }
    .form-control:focus {
      outline: none;
      border-color: var(--color-accent);
      background-color: #FFFFFF;
    }
    .form-submit-btn {
      width: 100%;
      height: 48px;
      background-color: var(--color-accent);
      color: #FFFFFF;
      border: none;
      border-radius: var(--radius-sm);
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
      transition: var(--transition);
      margin-top: 0.5rem;
    }
    .form-submit-btn:hover {
      background-color: var(--color-accent-hover);
    }

    /* 页脚 */
    .site-footer {
      background-color: #070F1A;
      color: #94A3B8;
      padding: 4.5rem 0 2rem;
      font-size: 0.88rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
      gap: 3rem;
      margin-bottom: 3.5rem;
    }
    .footer-brand h3 {
      font-size: 1.35rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 1rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .footer-brand p {
      line-height: 1.7;
      margin-bottom: 1.25rem;
      color: #94A3B8;
    }
    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 1.25rem;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 0.65rem;
    }
    .footer-links a:hover {
      color: var(--color-accent);
    }
    .footer-contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 1rem;
      font-size: 0.825rem;
    }

    /* 浮动转化栏 (吸底 CTA) */
    .floating-cta-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background-color: rgba(11, 25, 44, 0.95);
      backdrop-filter: blur(10px);
      border-top: 2px solid var(--color-accent);
      z-index: 900;
      padding: 0.85rem 0;
      box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
    }
    .floating-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .floating-text {
      color: #FFFFFF;
      font-size: 0.95rem;
      font-weight: 600;
    }
    .floating-sub {
      color: #94A3B8;
      font-size: 0.8rem;
      font-weight: normal;
      margin-left: 0.5rem;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-wrapper, .tech-overview-grid, .spec-diagram-card, .story-hero-card, .cta-banner {
        grid-template-columns: 1fr;
        gap: 2.5rem;
      }
      .grid-3x2, .product-grid, .specs-grid, .review-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem 1rem;
      }
      .metric-item:nth-child(2)::after {
        display: none;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        align-items: flex-start;
        padding: 1.5rem;
        gap: 1.25rem;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        display: none;
      }
      .nav-menu.active {
        display: flex;
      }
      .hero-title {
        font-size: 2.15rem;
      }
      .section-title {
        font-size: 1.8rem;
      }
      .scenario-row, .scenario-row.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
        gap: 2rem;
      }
      .grid-3x2, .product-grid, .specs-grid, .review-grid, .news-grid, .metrics-grid {
        grid-template-columns: 1fr;
      }
      .metric-item::after {
        display: none;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
      }
      .floating-cta-bar {
        padding: 0.65rem 0;
      }
      .floating-sub {
        display: none;
      }
      .cta-banner {
        padding: 2rem 1.5rem;
      }
    }