/* roulang page: index */
:root {
      --primary: #1D63FF;
      --primary-hover: #154ecc;
      --primary-light: #EBF2FF;
      --accent: #FF7A00;
      --accent-hover: #E66E00;
      --accent-light: #FFF4EB;
      --dark: #0F172A;
      --dark-card: #1E293B;
      --muted: #475569;
      --muted-light: #64748B;
      --bg: #F8FAFC;
      --card-bg: #FFFFFF;
      --border: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
      --shadow-md: 0 10px 30px -5px rgba(15, 23, 42, 0.05);
      --shadow-lg: 0 20px 40px -10px rgba(29, 99, 255, 0.12);
      --shadow-glow: 0 0 25px rgba(29, 99, 255, 0.35);
      --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

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

    body {
      font-family: var(--font);
      background-color: var(--bg);
      color: var(--dark);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    button, input {
      font-family: inherit;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航系统 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      width: 100%;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
    }

    .top-bar {
      background: var(--dark);
      color: #94A3B8;
      font-size: 13px;
      padding: 6px 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-tags {
      display: flex;
      gap: 16px;
    }

    .top-bar-tags span {
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }

    .nav-main {
      padding: 14px 0;
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 22px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }

    .brand-logo-badge {
      background: var(--primary);
      color: #fff;
      padding: 3px 8px;
      font-size: 11px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      text-transform: uppercase;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 24px;
      list-style: none;
    }

    .nav-links a {
      font-size: 15px;
      font-weight: 600;
      color: var(--muted);
      position: relative;
      padding: 6px 0;
    }

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

    .nav-links a.active::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
    }

    .nav-action-btn {
      background: var(--accent);
      color: #FFFFFF;
      font-size: 14px;
      font-weight: 700;
      padding: 10px 22px;
      border-radius: var(--radius-full);
      box-shadow: 0 4px 14px rgba(255, 122, 0, 0.3);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: all 0.25s ease;
    }

    .nav-action-btn:hover {
      background: var(--accent-hover);
      transform: translateY(-1px);
    }

    /* 移动端汉堡菜单 */
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--dark);
      cursor: pointer;
      padding: 8px;
    }

    /* 板块排版全局统一规范 */
    .section-wrap {
      padding: 88px 0;
      position: relative;
    }

    .section-bg-alt {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .section-header {
      margin-bottom: 48px;
    }

    .section-header.text-center {
      text-align: center;
    }

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 14px;
      border-radius: var(--radius-full);
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.3;
      color: var(--dark);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--muted);
      max-width: 760px;
      line-height: 1.7;
    }

    .section-desc.mx-auto {
      margin-left: auto;
      margin-right: auto;
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 28px;
      border-radius: var(--radius-md);
      font-size: 15px;
      font-weight: 700;
      cursor: pointer;
      border: 1px solid transparent;
      gap: 8px;
      transition: all 0.25s ease;
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 4px 16px rgba(29, 99, 255, 0.25);
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(29, 99, 255, 0.35);
    }

    .btn-accent {
      background: var(--accent);
      color: #fff;
      box-shadow: 0 4px 16px rgba(255, 122, 0, 0.25);
    }

    .btn-accent:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
    }

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

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

    /* 板块 1：Hero 对比首屏 */
    .hero-section {
      padding: 72px 0 88px;
      background: radial-gradient(circle at 85% 15%, rgba(29, 99, 255, 0.08) 0%, transparent 60%), #F8FAFC;
      border-bottom: 1px solid var(--border);
    }

    .hero-top-info {
      text-align: center;
      max-width: 860px;
      margin: 0 auto 52px;
    }

    .hero-h1 {
      font-size: 46px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--dark);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-h1 span {
      color: var(--primary);
    }

    .hero-summary {
      font-size: 17px;
      color: var(--muted);
      line-height: 1.75;
      margin-bottom: 30px;
    }

    .hero-badge-row {
      display: flex;
      justify-content: center;
      gap: 12px;
      flex-wrap: wrap;
    }

    .hero-badge {
      background: #FFFFFF;
      border: 1px solid var(--border);
      padding: 8px 18px;
      border-radius: var(--radius-full);
      font-size: 14px;
      font-weight: 600;
      color: var(--dark);
      display: flex;
      align-items: center;
      gap: 6px;
      box-shadow: var(--shadow-sm);
    }

    .hero-badge svg {
      color: var(--primary);
    }

    /* 首屏 Before / After 并置卡片 */
    .comparison-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
      margin-bottom: 40px;
    }

    .comparison-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
      position: relative;
      border: 2px solid transparent;
      transition: all 0.3s ease;
    }

    .comparison-card.card-before {
      background: #F1F5F9;
      border-color: #CBD5E1;
      opacity: 0.88;
    }

    .comparison-card.card-after {
      border-color: var(--primary);
      box-shadow: var(--shadow-lg);
      background: #FFFFFF;
    }

    .compare-label {
      display: inline-block;
      font-size: 13px;
      font-weight: 800;
      padding: 4px 12px;
      border-radius: 6px;
      margin-bottom: 18px;
    }

    .card-before .compare-label {
      background: #94A3B8;
      color: #FFFFFF;
    }

    .card-after .compare-label {
      background: var(--primary);
      color: #FFFFFF;
    }

    .compare-title {
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 12px;
      color: var(--dark);
    }

    .compare-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-top: 20px;
    }

    .compare-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 15px;
      line-height: 1.5;
    }

    .item-icon-cross {
      color: #EF4444;
      font-weight: bold;
      flex-shrink: 0;
      margin-top: 2px;
    }

    .item-icon-check {
      color: #10B981;
      font-weight: bold;
      flex-shrink: 0;
      margin-top: 2px;
    }

    .hero-action-bar {
      display: flex;
      justify-content: center;
      gap: 18px;
      flex-wrap: wrap;
    }

    /* 板块 2：已上线核心能力 Bento 网格 */
    .bento-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .bento-card {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-md);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .bento-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(29, 99, 255, 0.3);
    }

    .bento-icon-box {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-md);
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 20px;
    }

    .bento-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 10px;
    }

    .bento-desc {
      font-size: 14px;
      color: var(--muted);
      line-height: 1.6;
    }

    .bento-meta {
      margin-top: 18px;
      padding-top: 14px;
      border-top: 1px dashed var(--border);
      font-size: 13px;
      color: var(--primary);
      font-weight: 600;
    }

    /* 板块 3：技术参数速览 */
    .specs-table-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-md);
      overflow: hidden;
    }

    .specs-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      divide-x: 1px solid var(--border);
    }

    .spec-item {
      padding: 32px 24px;
      border-right: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .spec-item:nth-child(4n) {
      border-right: none;
    }

    .spec-label {
      font-size: 13px;
      font-weight: 600;
      color: var(--muted-light);
      text-transform: uppercase;
      margin-bottom: 8px;
    }

    .spec-value {
      font-size: 22px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 6px;
    }

    .spec-detail {
      font-size: 13px;
      color: var(--muted);
      line-height: 1.5;
    }

    /* 板块 4：爆款主力车型清单 */
    .fleet-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .fleet-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

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

    .fleet-img-wrap {
      height: 210px;
      position: relative;
      background: #E2E8F0;
      overflow: hidden;
    }

    .fleet-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .fleet-card:hover .fleet-img-wrap img {
      transform: scale(1.05);
    }

    .fleet-tag {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(15, 23, 42, 0.85);
      color: #FFFFFF;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 6px;
    }

    .fleet-body {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .fleet-title {
      font-size: 20px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 8px;
    }

    .fleet-specs-pills {
      display: flex;
      gap: 8px;
      margin-bottom: 16px;
      flex-wrap: wrap;
    }

    .fleet-pill {
      background: var(--bg);
      font-size: 12px;
      color: var(--muted);
      padding: 3px 8px;
      border-radius: 4px;
      border: 1px solid var(--border);
    }

    .fleet-price-row {
      display: flex;
      align-items: baseline;
      justify-content: space-between;
      padding-top: 16px;
      border-top: 1px solid var(--border);
    }

    .price-num {
      font-size: 26px;
      font-weight: 800;
      color: var(--accent);
    }

    .price-unit {
      font-size: 13px;
      color: var(--muted);
    }

    /* 板块 5：深色沉浸式智能车联研发与进行中能力 */
    .dark-tech-section {
      background-color: var(--dark);
      color: #FFFFFF;
      padding: 96px 0;
      position: relative;
      overflow: hidden;
    }

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

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

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

    .tech-item-card {
      background: var(--dark-card);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 32px;
      position: relative;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    }

    .tech-status-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(29, 99, 255, 0.25);
      color: #60A5FA;
      font-size: 12px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: var(--radius-full);
      margin-bottom: 16px;
    }

    .status-dot-pulse {
      width: 7px;
      height: 7px;
      background: #60A5FA;
      border-radius: 50%;
      box-shadow: 0 0 8px #60A5FA;
    }

    .tech-item-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
      color: #F8FAFC;
    }

    .tech-item-desc {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.6;
      margin-bottom: 20px;
    }

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

    .progress-fill {
      height: 100%;
      background: linear-gradient(90deg, var(--primary), #38BDF8);
      border-radius: 4px;
    }

    .progress-meta {
      display: flex;
      justify-content: space-between;
      font-size: 12px;
      color: #64748B;
    }

    /* 板块 6：规则中路线图与规划中功能 */
    .roadmap-timeline {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      position: relative;
    }

    .roadmap-card {
      background: #FFFFFF;
      border: 1px dashed #CBD5E1;
      border-radius: var(--radius-lg);
      padding: 30px;
      transition: all 0.3s ease;
    }

    .roadmap-card:hover {
      border-style: solid;
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
    }

    .roadmap-quarter {
      font-size: 14px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 8px;
    }

    .roadmap-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 12px;
    }

    .roadmap-desc {
      font-size: 14px;
      color: var(--muted);
      line-height: 1.6;
    }

    /* 板块 7：裂变邀请奖励与排行榜 */
    .fission-box {
      background: linear-gradient(135deg, #1E3A8A 0%, #1D63FF 100%);
      color: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 44px;
      box-shadow: var(--shadow-lg);
    }

    .fission-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 36px;
      align-items: center;
    }

    .fission-title {
      font-size: 30px;
      font-weight: 800;
      margin-bottom: 12px;
    }

    .fission-desc {
      font-size: 15px;
      color: #E2E8F0;
      line-height: 1.6;
      margin-bottom: 24px;
    }

    .fission-steps {
      display: flex;
      gap: 16px;
      margin-bottom: 24px;
    }

    .fission-step-item {
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 12px 16px;
      border-radius: var(--radius-md);
      flex: 1;
    }

    .fission-step-item strong {
      display: block;
      font-size: 14px;
      color: #FFD166;
    }

    .fission-step-item span {
      font-size: 12px;
      color: #E2E8F0;
    }

    .rank-board {
      background: rgba(15, 23, 42, 0.6);
      backdrop-filter: blur(10px);
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }

    .rank-header {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 14px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.15);
      padding-bottom: 8px;
      display: flex;
      justify-content: space-between;
    }

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

    .rank-row {
      display: flex;
      justify-content: space-between;
      font-size: 13px;
      color: #E2E8F0;
    }

    .rank-num {
      width: 20px;
      font-weight: 700;
      color: #F59E0B;
    }

    /* 板块 8：版本更新日志 */
    .changelog-box {
      border-left: 2px solid var(--primary);
      padding-left: 28px;
      margin-left: 12px;
      display: flex;
      flex-direction: column;
      gap: 36px;
    }

    .log-item {
      position: relative;
    }

    .log-node {
      position: absolute;
      left:-35px;
      top: 4px;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--primary);
      border: 3px solid #FFFFFF;
      box-shadow: 0 0 0 2px var(--primary);
    }

    .log-badge-group {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 8px;
    }

    .log-ver {
      font-size: 17px;
      font-weight: 800;
      color: var(--dark);
    }

    .log-date {
      font-size: 13px;
      color: var(--muted-light);
    }

    .log-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
      font-size: 14px;
      color: var(--muted);
      line-height: 1.6;
    }

    .log-list li::before {
      content: "•";
      color: var(--primary);
      font-weight: bold;
      display: inline-block;
      width: 1em;
      margin-left: -1em;
    }

    /* 板块 9：自驾攻略与行业资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .news-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

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

    .news-thumb {
      height: 190px;
      overflow: hidden;
      background: #CBD5E1;
    }

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

    .news-card:hover .news-thumb img {
      transform: scale(1.06);
    }

    .news-content {
      padding: 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .news-tag {
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
    }

    .news-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 10px;
      line-height: 1.45;
    }

    .news-snippet {
      font-size: 14px;
      color: var(--muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .news-date {
      font-size: 12px;
      color: var(--muted-light);
    }

    /* 板块 10：常见疑难拆解手风琴区 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: #FFFFFF;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }

    .faq-item[open] {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
    }

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

    .faq-summary::-webkit-details-marker {
      display: none;
    }

    .faq-summary::after {
      content: "+";
      font-size: 22px;
      font-weight: 400;
      color: var(--muted);
      transition: transform 0.25s ease;
    }

    .faq-item[open] .faq-summary::after {
      content: "−";
      color: var(--primary);
    }

    .faq-answer {
      padding: 0 24px 22px;
      font-size: 14px;
      color: var(--muted);
      line-height: 1.7;
      border-top: 1px solid #F1F5F9;
      padding-top: 14px;
    }

    /* 板块 11：全流程安心履约保障条 */
    .guarantee-strip {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border);
      padding: 32px 24px;
      box-shadow: var(--shadow-md);
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .guarantee-col {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }

    .guarantee-icon {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-md);
      background: var(--accent-light);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      font-weight: 800;
      font-size: 18px;
    }

    .guarantee-h {
      font-size: 16px;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 4px;
    }

    .guarantee-p {
      font-size: 13px;
      color: var(--muted);
      line-height: 1.5;
    }

    /* 板块 12：订阅更新与底部下载转化收口 */
    .cta-download-box {
      background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 100%);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      color: #FFFFFF;
      box-shadow: var(--shadow-lg);
      position: relative;
      overflow: hidden;
    }

    .cta-download-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 36px;
      align-items: center;
      position: relative;
      z-index: 2;
    }

    .cta-download-h {
      font-size: 34px;
      font-weight: 900;
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .cta-download-p {
      font-size: 16px;
      color: #CBD5E1;
      line-height: 1.7;
      margin-bottom: 28px;
    }

    .subscribe-inline-form {
      display: flex;
      gap: 10px;
      max-width: 480px;
    }

    .sub-input {
      flex: 1;
      padding: 13px 18px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, 0.25);
      background: rgba(255, 255, 255, 0.1);
      color: #FFFFFF;
      font-size: 14px;
      outline: none;
    }

    .sub-input::placeholder {
      color: #94A3B8;
    }

    .sub-input:focus {
      border-color: #38BDF8;
      background: rgba(255, 255, 255, 0.18);
    }

    .qr-card-bundle {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 14px;
    }

    .qr-frame {
      width: 140px;
      height: 140px;
      background: #FFFFFF;
      border-radius: var(--radius-sm);
      padding: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    }

    .qr-svg {
      width: 100%;
      height: 100%;
    }

    .qr-label-txt {
      font-size: 13px;
      color: #E2E8F0;
    }

    /* 全局页脚系统 */
    .site-footer {
      background: #0B1120;
      color: #94A3B8;
      font-size: 14px;
      padding-top: 64px;
      border-top: 1px solid #1E293B;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 48px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .footer-logo {
      font-size: 22px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
      display: inline-block;
    }

    .footer-desc {
      font-size: 14px;
      line-height: 1.7;
      color: #64748B;
      margin-bottom: 18px;
    }

    .footer-col-title {
      font-size: 15px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
    }

    .footer-link-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .footer-link-list a {
      color: #94A3B8;
    }

    .footer-link-list a:hover {
      color: #FFFFFF;
      padding-left: 4px;
    }

    .footer-contact-info {
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 13px;
    }

    .footer-bottom-bar {
      padding: 24px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: #64748B;
    }

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

    .footer-bottom-bar a:hover {
      color: #FFFFFF;
    }

    /* 移动端菜单抽屉 */
    .mobile-menu-drawer {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(15, 23, 42, 0.6);
      z-index: 1000;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease;
    }

    .mobile-menu-drawer.active {
      opacity: 1;
      pointer-events: auto;
    }

    .mobile-menu-panel {
      position: absolute;
      top: 0;
      right: 0;
      width: 280px;
      height: 100%;
      background: #FFFFFF;
      padding: 24px;
      box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transform: translateX(100%);
      transition: transform 0.3s ease;
    }

    .mobile-menu-drawer.active .mobile-menu-panel {
      transform: translateX(0);
    }

    .mobile-menu-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 18px;
      margin-top: 24px;
    }

    .mobile-menu-links a {
      font-size: 16px;
      font-weight: 600;
      color: var(--dark);
      display: block;
      padding: 6px 0;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .comparison-grid {
        grid-template-columns: 1fr;
      }
      .bento-grid,
      .fleet-grid,
      .tech-progress-grid,
      .roadmap-timeline,
      .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .specs-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .specs-item:nth-child(2n) {
        border-right: none;
      }
      .guarantee-strip {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-links,
      .nav-action-btn {
        display: none;
      }
      .mobile-toggle {
        display: block;
      }
      .mobile-menu-drawer {
        display: block;
      }
      .hero-h1 {
        font-size: 32px;
      }
      .section-wrap {
        padding: 56px 0;
      }
      .section-title {
        font-size: 26px;
      }
      .bento-grid,
      .fleet-grid,
      .tech-progress-grid,
      .roadmap-timeline,
      .news-grid {
        grid-template-columns: 1fr;
      }
      .specs-grid {
        grid-template-columns: 1fr;
      }
      .spec-item {
        border-right: none;
      }
      .fission-grid,
      .cta-download-grid {
        grid-template-columns: 1fr;
      }
      .guarantee-strip {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom-bar {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .subscribe-inline-form {
        flex-direction: column;
      }
    }