/* roulang page: index */
:root {
      --c-primary: #0F141C;
      --c-accent: #10B981;
      --c-accent-hover: #059669;
      --c-secondary: #2A3241;
      --c-border: #E2E8F0;
      --c-bg: #F8FAFC;
      --c-white: #FFFFFF;
      --c-dark-bg: #0B0F17;
      --c-text-title: #0F172A;
      --c-text-body: #475569;
      --c-text-muted: #94A3B8;
      --font-main: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --shadow-sm: 0 2px 8px rgba(15, 20, 28, 0.04);
      --shadow-md: 0 6px 20px -2px rgba(15, 20, 28, 0.06);
      --shadow-lg: 0 12px 32px -4px rgba(15, 20, 28, 0.1);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 14px;
      --max-w: 1280px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: var(--font-main);
      background-color: var(--c-bg);
      color: var(--c-text-body);
      line-height: 1.65;
    }

    body {
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

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

    .container {
      width: 100%;
      max-width: var(--max-w);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部提示栏 */
    .top-bar {
      background: #090C12;
      color: var(--c-text-muted);
      font-size: 0.82rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      padding: 8px 0;
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .top-meta-group {
      display: flex;
      gap: 20px;
    }
    .top-meta-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* 主导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--c-border);
      transition: all 0.3s;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--c-text-title);
      letter-spacing: -0.5px;
    }
    .brand-logo-badge {
      background: var(--c-primary);
      color: var(--c-accent);
      padding: 4px 8px;
      border-radius: var(--radius-sm);
      font-size: 0.75rem;
      font-weight: 600;
      border: 1px solid rgba(16, 185, 129, 0.3);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 28px;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--c-secondary);
      position: relative;
      padding: 6px 0;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--c-text-title);
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--c-accent);
      transition: width 0.25s ease;
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .nav-cta-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--c-accent);
      color: #032e1f;
      font-weight: 600;
      font-size: 0.9rem;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
    }
    .nav-cta-btn:hover {
      background: #0eb57d;
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
    }

    /* 移动端菜单按钮 */
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--c-border);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      cursor: pointer;
      color: var(--c-text-title);
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 26px;
      font-size: 0.98rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
    }
    .btn-primary {
      background: var(--c-accent);
      color: #032e1f;
    }
    .btn-primary:hover {
      background: var(--c-accent-hover);
      color: #ffffff;
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(16, 185, 129, 0.3);
    }
    .btn-outline {
      background: transparent;
      border-color: var(--c-border);
      color: var(--c-text-title);
    }
    .btn-outline:hover {
      border-color: var(--c-accent);
      color: var(--c-accent);
      background: rgba(16, 185, 129, 0.04);
      transform: translateY(-2px);
    }
    .btn-dark {
      background: var(--c-primary);
      color: var(--c-white);
      border-color: rgba(255, 255, 255, 0.15);
    }
    .btn-dark:hover {
      background: #1a2230;
      border-color: var(--c-accent);
      transform: translateY(-2px);
    }

    /* 标签与徽章 */
    .section-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--c-accent);
      background: rgba(16, 185, 129, 0.08);
      border: 1px solid rgba(16, 185, 129, 0.2);
      padding: 5px 12px;
      border-radius: 99px;
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .section-badge::before {
      content: "";
      width: 6px;
      height: 6px;
      background: var(--c-accent);
      border-radius: 50%;
    }

    /* 板块通用 */
    .section-spacing {
      padding: 86px 0;
      border-bottom: 1px solid var(--c-border);
    }
    .section-header {
      margin-bottom: 48px;
    }
    .section-header.text-center {
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--c-text-title);
      line-height: 1.3;
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--c-text-body);
      line-height: 1.7;
    }

    /* 板块1：Hero Banner */
    .hero-section {
      background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
      padding: 70px 0 84px;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--c-border);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 2.9rem;
      font-weight: 800;
      color: var(--c-text-title);
      line-height: 1.22;
      letter-spacing: -1px;
      margin-bottom: 20px;
    }
    .hero-content h1 span {
      color: #047857;
      display: inline-block;
      background: linear-gradient(120deg, #059669, #10B981);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.12rem;
      color: var(--c-text-body);
      line-height: 1.75;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .hero-stats-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      border-top: 1px solid var(--c-border);
      padding-top: 24px;
    }
    .stat-mini-num {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--c-text-title);
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    }
    .stat-mini-label {
      font-size: 0.85rem;
      color: var(--c-text-muted);
    }
    .hero-visual-card {
      position: relative;
      background: var(--c-primary);
      border-radius: var(--radius-lg);
      padding: 16px;
      box-shadow: var(--shadow-lg);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .hero-visual-card img {
      border-radius: var(--radius-md);
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .floating-radar-badge {
      position: absolute;
      bottom: 32px;
      left: 32px;
      right: 32px;
      background: rgba(15, 20, 28, 0.88);
      backdrop-filter: blur(8px);
      border: 1px solid rgba(16, 185, 129, 0.4);
      padding: 14px 18px;
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: space-between;
      color: var(--c-white);
      font-size: 0.88rem;
    }

    /* 板块2：传统痛点 vs AI检测 */
    .pain-points-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 22px;
    }
    .pain-card {
      background: var(--c-white);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .pain-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(16, 185, 129, 0.4);
    }
    .pain-status {
      font-size: 0.78rem;
      font-weight: 700;
      padding: 3px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 14px;
    }
    .pain-status-danger {
      background: #FEE2E2;
      color: #991B1B;
    }
    .pain-status-ai {
      background: #D1FAE5;
      color: #065F46;
    }
    .pain-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--c-text-title);
      margin-bottom: 10px;
    }
    .pain-card p {
      font-size: 0.92rem;
      color: var(--c-text-body);
      line-height: 1.65;
    }

    /* 板块3：产品图文交错概览 */
    .overview-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .overview-img-wrap {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--c-border);
    }
    .overview-img-wrap img {
      width: 100%;
      height: 420px;
      object-fit: cover;
    }
    .spec-list {
      margin-top: 24px;
      list-style: none;
      display: grid;
      gap: 12px;
    }
    .spec-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.95rem;
    }
    .spec-dot {
      width: 8px;
      height: 8px;
      background: var(--c-accent);
      border-radius: 50%;
      margin-top: 8px;
      flex-shrink: 0;
    }

    /* 板块4：核心能力 6网格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-box {
      background: var(--c-white);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: all 0.25s ease;
      position: relative;
    }
    .feature-box:hover {
      border-color: var(--c-accent);
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .feature-num {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 1.4rem;
      font-weight: 700;
      color: rgba(16, 185, 129, 0.3);
      position: absolute;
      top: 24px;
      right: 24px;
    }
    .feature-box h3 {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--c-text-title);
      margin-bottom: 12px;
    }
    .feature-box p {
      font-size: 0.94rem;
      color: var(--c-text-body);
      line-height: 1.65;
    }
    .feature-tag-row {
      margin-top: 18px;
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .micro-badge {
      font-size: 0.75rem;
      background: #F1F5F9;
      color: #475569;
      padding: 2px 8px;
      border-radius: 4px;
    }

    /* 板块5：硬件/软件矩阵 */
    .lineup-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .lineup-card {
      background: var(--c-white);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-lg);
      padding: 32px 26px;
      display: flex;
      flex-direction: column;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .lineup-card.recommended {
      border: 2px solid var(--c-accent);
      box-shadow: var(--shadow-md);
    }
    .recommend-badge {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--c-accent);
      color: #032e1f;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 12px;
      border-radius: 20px;
    }
    .lineup-card h3 {
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--c-text-title);
      margin-bottom: 8px;
    }
    .lineup-sub {
      font-size: 0.88rem;
      color: var(--c-text-muted);
      margin-bottom: 20px;
      min-height: 42px;
    }
    .lineup-params {
      list-style: none;
      border-top: 1px dashed var(--c-border);
      border-bottom: 1px dashed var(--c-border);
      padding: 18px 0;
      margin-bottom: 24px;
      display: grid;
      gap: 10px;
      font-size: 0.9rem;
      flex-grow: 1;
    }
    .lineup-params li {
      display: flex;
      justify-content: space-between;
      color: var(--c-secondary);
    }
    .lineup-params span:last-child {
      font-weight: 600;
      color: var(--c-text-title);
    }

    /* 板块6：实施流程时间线 */
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .timeline-step-item {
      background: var(--c-white);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      position: relative;
    }
    .step-index {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--c-primary);
      color: var(--c-accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
      margin-bottom: 16px;
      border: 1px solid rgba(16, 185, 129, 0.4);
    }
    .timeline-step-item h3 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--c-text-title);
      margin-bottom: 8px;
    }
    .timeline-step-item p {
      font-size: 0.9rem;
      color: var(--c-text-body);
      line-height: 1.6;
    }

    /* 板块7：深色实测案例通栏 */
    .dark-section {
      background: var(--c-dark-bg);
      color: #E2E8F0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .dark-section .section-title {
      color: #FFFFFF;
    }
    .dark-section .section-desc {
      color: #94A3B8;
    }
    .case-arch-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .arch-code-box {
      background: #131A26;
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 24px;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      font-size: 0.88rem;
      line-height: 1.6;
    }
    .arch-code-row {
      display: flex;
      justify-content: space-between;
      padding: 6px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .arch-code-row:last-child {
      border-bottom: none;
    }
    .arch-key {
      color: #38BDF8;
    }
    .arch-val {
      color: var(--c-accent);
      font-weight: 600;
    }

    /* 板块8：用户故事大卡片 */
    .stories-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .story-card {
      background: var(--c-white);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
    }
    .story-card img {
      width: 100%;
      height: 240px;
      object-fit: cover;
    }
    .story-body {
      padding: 30px;
    }
    .story-tag {
      font-size: 0.78rem;
      color: var(--c-accent);
      font-weight: 600;
      margin-bottom: 8px;
      display: inline-block;
    }
    .story-body h3 {
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--c-text-title);
      margin-bottom: 12px;
    }
    .story-body p {
      font-size: 0.95rem;
      color: var(--c-text-body);
      line-height: 1.65;
      margin-bottom: 20px;
    }
    .story-data-pill {
      background: #F8FAFC;
      border: 1px solid var(--c-border);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      display: flex;
      justify-content: space-between;
      font-size: 0.88rem;
    }

    /* 板块9：关键数据指标条 */
    .metrics-bar-section {
      background: var(--c-primary);
      padding: 64px 0;
      color: var(--c-white);
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .metric-item {
      padding: 12px;
      border-right: 1px solid rgba(255, 255, 255, 0.1);
    }
    .metric-item:last-child {
      border-right: none;
    }
    .metric-value {
      font-size: 2.8rem;
      font-weight: 800;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      color: var(--c-accent);
      margin-bottom: 6px;
      letter-spacing: -1px;
    }
    .metric-title {
      font-size: 1rem;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 4px;
    }
    .metric-note {
      font-size: 0.82rem;
      color: var(--c-text-muted);
    }

    /* 板块10：客户证言口碑 */
    .testimonials-grid {
      display: grid;grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }
    .testimonial-card {
      background: var(--c-white);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 30px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
    }
    .testimonial-stars {
      color: #F59E0B;
      font-size: 1rem;
      margin-bottom: 14px;
      letter-spacing: 2px;
    }
    .testimonial-text {
      font-size: 0.95rem;
      color: var(--c-text-body);
      line-height: 1.7;
      margin-bottom: 22px;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }
    .user-avatar-initial {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--c-secondary);
      color: var(--c-accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }
    .user-meta-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--c-text-title);
    }
    .user-meta-role {
      font-size: 0.8rem;
      color: var(--c-text-muted);
    }

    /* 板块11：行业资讯与算法动态 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }
    .news-card {
      background: var(--c-white);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .news-card img {
      width: 100%;
      height: 200px;
      object-fit: cover;
    }
    .news-content {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--c-text-muted);
      margin-bottom: 8px;
    }
    .news-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--c-text-title);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .news-card p {
      font-size: 0.9rem;
      color: var(--c-text-body);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .news-badge {
      display: inline-block;
      font-size: 0.78rem;
      color: var(--c-accent);
      font-weight: 600;
    }

    /* 板块12：FAQ手风琴 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: grid;
      gap: 16px;
    }
    .faq-item {
      background: var(--c-white);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color 0.2s ease;
    }
    .faq-item[open] {
      border-color: var(--c-accent);
    }
    .faq-summary {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--c-text-title);
      cursor: pointer;
      list-style: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }
    .faq-summary::-webkit-details-marker {
      display: none;
    }
    .faq-summary::after {
      content: "+";
      font-size: 1.3rem;
      color: var(--c-text-muted);
      transition: transform 0.25s ease;
    }
    .faq-item[open] .faq-summary::after {
      content: "−";
      color: var(--c-accent);
    }
    .faq-body {
      padding: 0 24px 22px;
      font-size: 0.95rem;
      color: var(--c-text-body);
      line-height: 1.7;
      border-top: 1px solid #F1F5F9;
      margin-top: 4px;
      padding-top: 16px;
    }

    /* 板块13：高意向预约转化区 */
    .cta-banner-section {
      background: linear-gradient(135deg, #0F141C 0%, #1A2332 100%);
      padding: 72px 0;
      color: var(--c-white);
    }
    .cta-banner-card {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .cta-banner-card h2 {
      font-size: 2.2rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: #FFFFFF;
      letter-spacing: -0.5px;
    }
    .cta-banner-card p {
      font-size: 1.02rem;
      color: #94A3B8;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .cta-feature-check {
      list-style: none;
      display: grid;
      gap: 10px;
      font-size: 0.92rem;
      color: #CBD5E1;
    }
    .cta-feature-check li::before {
      content: "✓ ";
      color: var(--c-accent);
      font-weight: 700;
      margin-right: 6px;
    }
    .cta-form-panel {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      border-radius: var(--radius-lg);
      padding: 32px;
      backdrop-filter: blur(8px);
    }
    .cta-form-title {
      font-size: 1.2rem;
      font-weight: 600;
      margin-bottom: 20px;
      color: #FFFFFF;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      font-size: 0.85rem;
      color: #94A3B8;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.18);
      border-radius: var(--radius-sm);
      color: #FFFFFF;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--c-accent);
      background: rgba(255, 255, 255, 0.12);
    }
    .form-control option {
      background: #0F141C;
      color: #FFFFFF;
    }
    .btn-submit-full {
      width: 100%;
      padding: 13px;
      margin-top: 8px;
    }

    /* 页脚 */
    .site-footer {
      background: #070A0F;
      color: #94A3B8;
      font-size: 0.9rem;
      padding: 64px 0 32px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-brand h4 {
      font-size: 1.3rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 14px;
    }
    .footer-brand p {
      line-height: 1.7;
      font-size: 0.88rem;
      color: #64748B;
      max-width: 320px;
    }
    .footer-col h5 {
      font-size: 1rem;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      display: grid;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--c-accent);
    }
    .footer-contact-item {
      display: flex;
      gap: 8px;
      margin-bottom: 8px;
      font-size: 0.88rem;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      padding-top: 28px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.82rem;
      color: #64748B;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid, .overview-row, .case-arch-grid, .cta-banner-card {
        grid-template-columns: 1fr;
      }
      .pain-points-grid, .features-grid, .lineup-grid, .timeline-steps, .news-grid, .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-item:nth-child(2) {
        border-right: none;
      }
      .hero-content h1 {
        font-size: 2.3rem;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-menu {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .pain-points-grid, .features-grid, .lineup-grid, .timeline-steps, .news-grid, .testimonials-grid, .stories-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding-bottom: 20px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-content h1 {
        font-size: 1.85rem;
      }
      .section-title {
        font-size: 1.6rem;
      }
      .section-spacing {
        padding: 56px 0;
      }
      .hero-stats-row {
        grid-template-columns: 1fr;
      }
    }