/* roulang page: index */
:root {
      --bg-primary: #0b0e14;
      --bg-surface: #151922;
      --bg-elevated: #1c2230;
      --color-accent: #6366f1;
      --color-accent-hover: #4f46e5;
      --color-accent-grad: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
      --color-cyber: #06b6d4;
      --text-main: #f8fafc;
      --text-muted: #94a3b8;
      --text-weak: #64748b;
      --border-line: rgba(255, 255, 255, 0.08);
      --border-glow: rgba(99, 102, 241, 0.35);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --shadow-box: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
      --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      background-color: var(--bg-primary);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .mono-num {
      font-family: var(--font-mono);
      letter-spacing: -0.5px;
    }
    
    /* 顶部服务辅助条 */
    .top-bar {
      background-color: var(--bg-surface);
      border-bottom: 1px solid var(--border-line);
      font-size: 13px;
      color: var(--text-muted);
      height: 38px;
      display: flex;
      align-items: center;
    }
    .top-bar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-left {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .top-pill {
      background: rgba(6, 182, 212, 0.12);
      color: var(--color-cyber);
      padding: 2px 8px;
      border-radius: var(--radius-sm);
      font-size: 11px;
      font-weight: 600;
    }
    .top-bar-right {
      display: flex;
      gap: 20px;
    }
    .top-bar-right a:hover {
      color: var(--text-main);
    }

    /* 主导航 */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(11, 14, 20, 0.85);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border-line);
      height: 72px;
      display: flex;
      align-items: center;
    }
    .header-nav .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 20px;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: var(--text-main);
    }
    .brand-symbol {
      width: 36px;
      height: 36px;
      background: var(--color-accent-grad);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 800;
      box-shadow: 0 0 16px rgba(99, 102, 241, 0.4);
    }
    .nav-links {
      display: flex;
      gap: 32px;
      list-style: none;
    }
    .nav-links a {
      font-size: 15px;
      color: var(--text-muted);
      font-weight: 500;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: #fff;
      text-shadow: 0 0 12px rgba(255, 255, 255, 0.5);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .btn-primary {
      background: var(--color-accent-grad);
      color: #fff;
      box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(99, 102, 241, 0.6);
    }
    .btn-outline {
      background: rgba(255, 255, 255, 0.04);
      border-color: var(--border-line);
      color: var(--text-main);
    }
    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.08);
      border-color: var(--color-cyber);
      color: var(--color-cyber);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--text-main);
      font-size: 24px;
      cursor: pointer;
    }

    /* 统一 section 样式 */
    section {
      padding: 86px 0;
      position: relative;
    }
    .section-alt {
      background-color: var(--bg-surface);
      border-top: 1px solid var(--border-line);
      border-bottom: 1px solid var(--border-line);
    }
    .section-header {
      max-width: 780px;
      margin: 0 auto 54px;
      text-align: center;
    }
    .section-badge {
      display: inline-block;
      font-size: 12px;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--color-cyber);
      background: rgba(6, 182, 212, 0.1);
      border: 1px solid rgba(6, 182, 212, 0.25);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 16px;
      font-weight: 600;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Section 1: Hero 券墙与工作流入口 */
    .hero-section {
      padding: 60px 0 90px;
      background: radial-gradient(circle at 80% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 60%),
                  radial-gradient(circle at 10% 80%, rgba(6, 182, 212, 0.1) 0%, transparent 50%),
                  var(--bg-primary);
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 800;
      letter-spacing: -1px;
      margin-bottom: 22px;
      background: linear-gradient(135deg, #ffffff 40%, #cbd5e1 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-intro {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 36px;
    }
    .hero-tag {
      font-size: 12px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-line);
      padding: 4px 12px;
      border-radius: var(--radius-sm);
      color: #cbd5e1;
    }
    .hero-ctas {
      display: flex;
      gap: 16px;
      align-items: center;
    }
    .coupon-card-hero {
      background: linear-gradient(135deg, #1c2230 0%, #151922 100%);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6);
      position: relative;
      overflow: hidden;
    }
    .coupon-card-hero::before {
      content: "";
      position: absolute;
      top: -40px;
      right: -40px;
      width: 120px;
      height: 120px;
      background: var(--color-accent);
      filter: blur(50px);
      opacity: 0.3;
    }
    .coupon-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      padding-bottom: 16px;
      border-bottom: 1px dashed rgba(255, 255, 255, 0.15);
    }
    .coupon-type {
      color: var(--color-cyber);
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
    }
    .coupon-amount {
      font-size: 38px;
      font-weight: 800;
      color: #fff;
      display: flex;
      align-items: baseline;
      gap: 4px;
      margin-bottom: 12px;
    }
    .coupon-amount span {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 400;
    }
    .coupon-info-list {
      list-style: none;
      margin-bottom: 24px;
    }
    .coupon-info-list li {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .coupon-info-list li::before {
      content: "✓";
      color: var(--color-cyber);
      font-weight: bold;
    }

    /* Section 2: 适用人群 */
    .audience-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .audience-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      transition: all 0.3s ease;
    }
    .audience-card:hover {
      transform: translateY(-4px);
      border-color: var(--color-accent);
      box-shadow: var(--shadow-box);
    }
    .audience-role {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: #fff;
    }
    .audience-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .audience-metric {
      font-size: 12px;
      color: var(--color-cyber);
      font-family: var(--font-mono);
      background: rgba(6, 182, 212, 0.08);
      padding: 4px 8px;
      border-radius: 4px;
      display: inline-block;
    }

    /* Section 3: 谁适合/谁不适合 */
    .fit-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .fit-box {
      background: var(--bg-elevated);
      border-radius: var(--radius-md);
      padding: 36px;
      border: 1px solid var(--border-line);
    }
    .fit-box.suitable {
      border-top: 4px solid #10b981;
    }
    .fit-box.unsuitable {
      border-top: 4px solid #f43f5e;
    }
    .fit-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .fit-list {
      list-style: none;
    }
    .fit-list li {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 16px;
      padding-left: 24px;
      position: relative;
      line-height: 1.6;
    }
    .fit-list.yes li::before {
      content: "●";
      position: absolute;
      left: 0;
      color: #10b981;
    }
    .fit-list.no li::before {
      content: "✕";
      position: absolute;
      left: 0;
      color: #f43f5e;
    }

    /* Section 4: 匹配方案矩阵 */
    .solution-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .solution-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .solution-card:hover {
      border-color: var(--color-accent);
      transform: translateY(-4px);
    }
    .solution-img-wrap {
      height: 200px;
      overflow: hidden;
      position: relative;
    }
    .solution-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .solution-card:hover .solution-img-wrap img {
      transform: scale(1.05);
    }
    .solution-badge {
      position: absolute;
      top: 12px;
      right: 12px;
      background: rgba(11, 14, 20, 0.75);
      backdrop-filter: blur(4px);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      font-size: 11px;
      color: var(--color-cyber);
      font-weight: 600;
    }
    .solution-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .solution-name {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .solution-p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
    }
    .solution-specs {
      font-size: 12px;
      font-family: var(--font-mono);
      color: var(--text-weak);
      border-top: 1px solid var(--border-line);
      padding-top: 14px;
      display: flex;
      justify-content: space-between;
    }

    /* Section 5: 入口分流 */
    .funnel-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .funnel-card {
      background: linear-gradient(180deg, var(--bg-elevated) 0%, var(--bg-surface) 100%);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 32px 26px;
      text-align: center;
      position: relative;
    }
    .funnel-icon {
      font-size: 32px;
      margin-bottom: 16px;
      color: var(--color-cyber);
    }
    .funnel-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .funnel-desc {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.6;
    }

    /* Section 6: 算力引擎底座参数 */
    .engine-benchmarks {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-bottom: 40px;
    }
    .benchmark-card {
      background: var(--bg-elevated);
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-line);
      text-align: center;
    }
    .benchmark-val {
      font-size: 32px;
      font-weight: 800;
      color: var(--color-cyber);
      margin-bottom: 6px;
    }
    .benchmark-lbl {
      font-size: 13px;
      color: var(--text-muted);
    }
    .engine-detail-box {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 36px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }

    /* Section 7: 6卡片核心优势网格 */
    .core-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .core-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 28px;
      position: relative;
      overflow: hidden;
      transition: all 0.3s ease;
    }
    .core-card:hover {
      border-color: var(--color-accent);
      transform: translateY(-3px);
      box-shadow: 0 10px 24px rgba(0,0,0,0.4);
    }
    .core-num {
      position: absolute;
      top: 14px;
      right: 18px;
      font-size: 28px;
      font-weight: 800;
      color: rgba(255, 255, 255, 0.05);
      font-family: var(--font-mono);
    }
    .core-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: #fff;
    }
    .core-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 8: 工业级资产渲染演示舞台 */
    .stage-container {
      background: #07090e;
      border: 1px solid var(--border-line);
      border-radius: var(--radius-lg);
      padding: 36px;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 36px;
      align-items: center;
    }
    .stage-preview {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.1);
      position: relative;
    }
    .stage-preview img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .stage-tag {
      position: absolute;
      bottom: 14px;
      left: 14px;
      background: rgba(11, 14, 20, 0.85);
      border: 1px solid var(--color-cyber);
      color: var(--color-cyber);
      padding: 4px 12px;
      font-size: 12px;
      font-weight: 600;
      border-radius: 4px;
    }
    .stage-controls {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .param-row {
      display: flex;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      padding-bottom: 10px;
      font-size: 14px;
    }
    .param-label {
      color: var(--text-muted);
    }
    .param-val {
      font-family: var(--font-mono);
      color: #fff;
      font-weight: 600;
    }

    /* Section 9: 游戏研发管线4步步进轴 */
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
    }
    .step-card::after {
      content: "→";
      position: absolute;
      right: -14px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 18px;
      color: var(--color-cyber);
      z-index: 2;
    }
    .step-card:last-child::after {
      display: none;
    }
    .step-badge {
      display: inline-block;
      font-family: var(--font-mono);
      font-size: 12px;
      background: rgba(99, 102, 241, 0.15);
      color: var(--color-accent);
      padding: 2px 8px;
      border-radius: 4px;
      margin-bottom: 12px;
      font-weight: 700;
    }
    .step-name {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .step-text {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 10: 游戏工作室用户故事 */
    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .story-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: grid;
      grid-template-columns: 180px 1fr;
    }
    .story-img {
      height: 100%;
    }
    .story-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .story-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .story-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .story-desc {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 14px;
      line-height: 1.6;
    }
    .story-tags {
      font-size: 12px;
      color: var(--color-cyber);
      font-weight: 600;
    }

    /* Section 11: 资讯与技术速递 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }    .news-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .news-card:hover {
      border-color: var(--color-cyber);
      transform: translateY(-4px);
    }
    .news-img {
      height: 180px;
      overflow: hidden;
    }
    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .news-card:hover .news-img img {
      transform: scale(1.06);
    }
    .news-content {
      padding: 22px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-meta {
      display: flex;
      justify-content: space-between;
      font-size: 12px;
      color: var(--text-weak);
      margin-bottom: 12px;
    }
    .news-title {
      font-size: 16px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
      line-height: 1.5;
    }
    .news-summary {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .news-link {
      font-size: 13px;
      color: var(--color-cyber);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* Section 12: 技术保障体系与合规边界 */
    .assurance-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .assurance-card {
      background: var(--bg-elevated);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: left;
    }
    .assurance-icon {
      font-size: 26px;
      color: var(--color-cyber);
      margin-bottom: 12px;
    }
    .assurance-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #fff;
    }
    .assurance-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 13: 商业版本与部署对比 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      align-items: stretch;
    }
    .pricing-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      padding: 36px 28px;
      display: flex;
      flex-direction: column;
      position: relative;
    }
    .pricing-card.featured {
      background: linear-gradient(180deg, var(--bg-elevated) 0%, var(--bg-surface) 100%);
      border-color: var(--color-accent);
      box-shadow: 0 0 30px rgba(99, 102, 241, 0.25);
    }
    .pricing-badge {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--color-accent-grad);
      color: #fff;
      font-size: 11px;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 20px;
      letter-spacing: 0.5px;
    }
    .pricing-plan {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: #fff;
    }
    .pricing-price {
      font-size: 38px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 16px;
      display: flex;
      align-items: baseline;
      gap: 6px;
    }
    .pricing-price span {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 400;
    }
    .pricing-features {
      list-style: none;
      margin: 24px 0 32px;
      flex-grow: 1;
    }
    .pricing-features li {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .pricing-features li::before {
      content: "✓";
      color: var(--color-cyber);
      font-weight: 800;
    }

    /* Section 14: 底部署名收口与转化通道 */
    .cta-banner {
      background: radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.2) 0%, transparent 70%), var(--bg-surface);
      border: 1px solid var(--border-glow);
      border-radius: var(--radius-lg);
      padding: 60px 40px;
      text-align: center;
      position: relative;
    }
    .cta-title {
      font-size: 34px;
      font-weight: 800;
      margin-bottom: 16px;
      color: #fff;
    }
    .cta-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }
    .cta-form {
      max-width: 520px;
      margin: 0 auto;
      display: flex;
      gap: 12px;
    }
    .cta-input {
      flex: 1;
      background: rgba(11, 14, 20, 0.8);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-sm);
      padding: 12px 16px;
      color: #fff;
      font-size: 14px;
      outline: none;
    }
    .cta-input:focus {
      border-color: var(--color-accent);
      box-shadow: 0 0 10px rgba(99, 102, 241, 0.3);
    }
    .cta-notice {
      margin-top: 14px;
      font-size: 12px;
      color: var(--text-weak);
    }

    /* 页脚系统 */
    .site-footer {
      background: #080a0f;
      border-top: 1px solid var(--border-line);
      padding: 70px 0 30px;
      font-size: 14px;
      color: var(--text-muted);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-logo {
      font-size: 18px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .footer-desc {
      font-size: 13px;
      line-height: 1.7;
      color: var(--text-weak);
      margin-bottom: 18px;
    }
    .footer-heading {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: var(--color-cyber);
    }
    .footer-trust-info {
      font-size: 13px;
      line-height: 1.8;
      color: var(--text-weak);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: var(--text-weak);
    }
    .footer-bottom a {
      color: var(--text-weak);
    }
    .footer-bottom a:hover {
      color: #fff;
    }

    /* 移动端侧滑抽屉 */
    .mobile-drawer {
      position: fixed;
      top: 0;
      right: -100%;
      width: 280px;
      height: 100vh;
      background: var(--bg-surface);
      border-left: 1px solid var(--border-line);
      z-index: 2000;
      padding: 30px 24px;
      display: flex;
      flex-direction: column;
      transition: right 0.3s ease;
      box-shadow: -10px 0 30px rgba(0, 0, 0, 0.7);
    }
    .mobile-drawer.open {
      right: 0;
    }
    .drawer-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 30px;
    }
    .drawer-close {
      background: none;
      border: none;
      color: #fff;
      font-size: 24px;
      cursor: pointer;
    }
    .drawer-nav {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .drawer-nav a {
      font-size: 16px;
      color: var(--text-muted);
      font-weight: 500;
      display: block;
      padding: 8px 0;
    }
    .drawer-nav a:hover {
      color: #fff;
    }
    .drawer-backdrop {
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      background: rgba(0, 0, 0, 0.6);
      z-index: 1999;
      display: none;
    }
    .drawer-backdrop.open {
      display: block;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .coupon-card-hero {
        max-width: 520px;
      }
      .audience-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .solution-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .core-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .timeline-steps {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
      }
      .step-card::after {
        display: none;
      }
      .stage-container {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-links, .nav-actions .btn {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .hero-h1 {
        font-size: 32px;
      }
      .section-title {
        font-size: 26px;
      }
      .fit-grid {
        grid-template-columns: 1fr;
      }
      .solution-grid {
        grid-template-columns: 1fr;
      }
      .funnel-grid {
        grid-template-columns: 1fr;
      }
      .engine-benchmarks {
        grid-template-columns: repeat(2, 1fr);
      }
      .engine-detail-box {
        grid-template-columns: 1fr;
      }
      .core-grid {
        grid-template-columns: 1fr;
      }
      .story-grid {
        grid-template-columns: 1fr;
      }
      .story-card {
        grid-template-columns: 1fr;
      }
      .story-img {
        height: 180px;
      }
      .news-grid {
        grid-template-columns: 1fr;
      }
      .assurance-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .pricing-grid {
        grid-template-columns: 1fr;
      }
      .cta-form {
        flex-direction: column;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }

    @media (max-width: 520px) {
      .audience-grid {
        grid-template-columns: 1fr;
      }
      .assurance-grid {
        grid-template-columns: 1fr;
      }
      .engine-benchmarks {
        grid-template-columns: 1fr;
      }
      .hero-ctas {
        flex-direction: column;
        align-items: stretch;
      }
    }