:root {
      --bg-base: #faf8f5;
      --bg-surface: #ffffff;
      --bg-subtle: #f2eee9;
      --text-main: #1f1d1d;
      --text-muted: #5e5a57;
      --text-light: #87827e;
      --border-color: #211e1c;
      --shadow-solid: 4px 4px 0px #211e1c;
      --shadow-hover: 6px 6px 0px #211e1c;
      --c-accent: #ff5e36;
      --c-yellow: #ffc93c;
      --c-teal: #05c46b;
      --c-sky: #0fbcf9;
      --c-purple: #9b59b6;
      --c-pink: #ff7675;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
      position: relative;
      overflow-x: hidden;
      background-image: radial-gradient(var(--border-color) 0.65px, transparent 0.65px);
      background-size: 24px 24px;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(250, 248, 245, 0.94);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--border-color);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      color: var(--text-main);
    }

    .brand-wrap .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 1.35rem;
      font-weight: 900;
      letter-spacing: -0.5px;
      color: var(--text-main);
    }

    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li a {
      padding: 8px 12px;
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      text-decoration: none;
      border-radius: var(--radius-sm);
      transition: all 0.15s ease;
      display: block;
    }

    .nav-links li a:hover {
      background: var(--c-yellow);
      transform: translateY(-2px);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn-nav-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--c-accent);
      color: #ffffff;
      font-weight: 800;
      font-size: 0.9rem;
      padding: 9px 18px;
      border-radius: var(--radius-sm);
      border: 2px solid var(--border-color);
      box-shadow: 2px 2px 0px var(--border-color);
      text-decoration: none;
      transition: transform 0.15s ease, box-shadow 0.15s ease;
    }

    .btn-nav-portal:hover {
      transform: translate(-2px, -2px);
      box-shadow: 4px 4px 0px var(--border-color);
    }

    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: 2px solid var(--border-color);
      padding: 6px 10px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      font-weight: 800;
      font-size: 1.1rem;
    }

    /* 涂鸦标题组件 */
    .section-head {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 50px auto;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 900;
      padding: 4px 14px;
      background: var(--c-yellow);
      border: 2px solid var(--border-color);
      border-radius: 30px;
      box-shadow: 2px 2px 0px var(--border-color);
      margin-bottom: 14px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
    }

    /* 首屏 Hero 区（严格纯代码构筑，无图片） */
    .hero-section {
      padding: 64px 0 54px 0;
      position: relative;
    }

    .hero-wrapper {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .hero-badge-row {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 20px;
    }

    .hero-badge {
      font-size: 0.82rem;
      font-weight: 800;
      padding: 4px 12px;
      border: 2px solid var(--border-color);
      border-radius: 4px;
      box-shadow: 2px 2px 0px var(--border-color);
    }

    .hb-1 { background: var(--c-pink); color: #fff; }
    .hb-2 { background: var(--c-sky); color: #111; }
    .hb-3 { background: var(--c-teal); color: #fff; }

    .hero-h1 {
      font-size: 2.75rem;
      line-height: 1.2;
      font-weight: 900;
      letter-spacing: -1px;
      color: var(--text-main);
      margin-bottom: 20px;
    }

    .hero-highlight {
      position: relative;
      display: inline-block;
      z-index: 1;
      padding: 0 4px;
    }

    .hero-highlight::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 6px;
      width: 100%;
      height: 35%;
      background: var(--c-yellow);
      z-index: -1;
      border-radius: 3px;
    }

    .hero-p {
      font-size: 1.15rem;
      line-height: 1.7;
      color: var(--text-muted);
      margin-bottom: 32px;
      font-weight: 500;
    }

    .hero-action-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      margin-bottom: 30px;
    }

    .btn-hero-primary {
      font-size: 1.15rem;
      font-weight: 900;
      padding: 14px 34px;
      background: var(--c-accent);
      color: #ffffff;
      border: 3px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-solid);
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: all 0.15s ease;
    }

    .btn-hero-primary:hover {
      transform: translate(-3px, -3px);
      box-shadow: var(--shadow-hover);
      background: #ff481b;
    }

    .btn-hero-secondary {
      font-size: 1.1rem;
      font-weight: 800;
      padding: 14px 28px;
      background: #ffffff;
      color: var(--text-main);
      border: 3px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-solid);
      text-decoration: none;
      transition: all 0.15s ease;
    }

    .btn-hero-secondary:hover {
      background: var(--bg-subtle);
      transform: translate(-3px, -3px);
      box-shadow: var(--shadow-hover);
    }

    /* 首屏右侧纯代码几何控制面板 */
    .hero-terminal-card {
      background: #ffffff;
      border: 3px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: 8px 8px 0px var(--border-color);
      padding: 24px;
      position: relative;
    }

    .terminal-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 2px dashed var(--border-color);
      padding-bottom: 14px;
      margin-bottom: 20px;
    }

    .terminal-dots {
      display: flex;
      gap: 8px;
    }

    .tdot {
      width: 14px;
      height: 14px;
      border-radius: 50%;
      border: 2px solid var(--border-color);
    }

    .tdot-1 { background: #ff5f56; }
    .tdot-2 { background: #ffbd2e; }
    .tdot-3 { background: #27c93f; }

    .terminal-title {
      font-size: 0.85rem;
      font-weight: 900;
      color: var(--text-main);
    }

    .engine-matrix {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-bottom: 20px;
    }

    .engine-box {
      border: 2px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 12px;
      background: var(--bg-subtle);
      transition: transform 0.2s;
    }

    .engine-box:hover {
      transform: translateY(-2px);
    }

    .engine-box h4 {
      font-size: 0.95rem;
      font-weight: 900;
      margin-bottom: 4px;
    }

    .engine-box p {
      font-size: 0.78rem;
      color: var(--text-muted);
    }

    .terminal-status-bar {
      background: #211e1c;
      color: #27c93f;
      font-family: monospace;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      line-height: 1.4;
    }

    /* 模块通用容器 */
    .content-section {
      padding: 64px 0;
      border-bottom: 2px solid var(--border-color);
    }

    .sec-alt {
      background-color: #fff8f0;
    }

    /* 数据指标网格 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .metric-card {
      background: #ffffff;
      border: 3px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-solid);
      padding: 24px;
      text-align: center;
      transition: transform 0.2s ease;
    }

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

    .metric-card .num {
      font-size: 2.6rem;
      font-weight: 900;
      color: var(--c-accent);
      line-height: 1;
      margin-bottom: 8px;
    }

    .metric-card .label {
      font-size: 1rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .metric-card .sub {
      font-size: 0.82rem;
      color: var(--text-light);
      margin-top: 4px;
    }

    /* 模型滚动展示条 */
    .models-marquee-card {
      background: #ffffff;
      border: 3px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-solid);
      margin-top: 40px;
    }

    .marquee-label {
      font-size: 1rem;
      font-weight: 900;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .model-tags-list {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .model-pill {
      font-size: 0.82rem;
      font-weight: 800;
      padding: 6px 14px;
      background: var(--bg-subtle);
      border: 1.5px solid var(--border-color);
      border-radius: 20px;
      color: var(--text-main);
      transition: background 0.2s;
    }

    .model-pill:hover {
      background: var(--c-yellow);
    }

    /* 核心场景服务网格 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 24px;
    }

    .scenario-card {
      background: #ffffff;
      border: 3px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-solid);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.2s ease;
    }

    .scenario-card:hover {
      transform: translate(-3px, -3px);
      box-shadow: var(--shadow-hover);
    }

    .sc-badge {
      align-self: flex-start;
      font-size: 0.75rem;
      font-weight: 900;
      padding: 3px 8px;
      border-radius: 4px;
      border: 1.5px solid var(--border-color);
      margin-bottom: 12px;
    }

    .scenario-card h3 {
      font-size: 1.25rem;
      font-weight: 900;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .scenario-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
      margin-bottom: 16px;
    }

    .scenario-card .sc-footer {
      border-top: 1.5px dashed var(--border-color);
      padding-top: 12px;
      font-size: 0.82rem;
      font-weight: 800;
      color: var(--c-accent);
      display: flex;
      justify-content: space-between;
    }

    /* 自动化一站式流水线 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-box {
      background: #ffffff;
      border: 3px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-solid);
      padding: 24px 20px;
      position: relative;
    }

    .step-index {
      width: 36px;
      height: 36px;
      background: var(--c-yellow);
      border: 2px solid var(--border-color);
      border-radius: 50%;
      font-weight: 900;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }

    .step-box h4 {
      font-size: 1.15rem;
      font-weight: 900;
      margin-bottom: 8px;
    }

    .step-box p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 案例展示区（含受控图文） */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .showcase-card {
      background: #ffffff;
      border: 3px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-solid);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .showcase-media {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: var(--bg-subtle);
      border-bottom: 3px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .showcase-media.square {
      aspect-ratio: 4 / 3;
    }

    .showcase-media img {
      max-width: 100%;
      height: auto;
      display: block;
      object-fit: contain;
    }

    .showcase-body {
      padding: 20px;
      flex-grow: 1;
    }

    .showcase-body h4 {
      font-size: 1.15rem;
      font-weight: 900;
      margin-bottom: 8px;
    }

    .showcase-body p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测版块 */
    .compare-wrap {
      background: #ffffff;
      border: 3px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-solid);
      padding: 32px;
    }

    .score-banner {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      background: #fff9e6;
      border: 2px dashed var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 24px;
      margin-bottom: 24px;
    }

    .score-big {
      display: flex;
      align-items: baseline;
      gap: 8px;
    }

    .score-val {
      font-size: 3rem;
      font-weight: 900;
      color: var(--c-accent);
      line-height: 1;
    }

    .score-full {
      font-size: 1.2rem;
      font-weight: 800;
      color: var(--text-muted);
    }

    .stars-render {
      font-size: 1.4rem;
      color: #ff9f1a;
      letter-spacing: 2px;
    }

    .compare-table-responsive {
      overflow-x: auto;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .compare-table th,
    .compare-table td {
      padding: 14px 18px;
      border: 2px solid var(--border-color);
      font-size: 0.95rem;
    }

    .compare-table th {
      background: var(--bg-subtle);
      font-weight: 900;
    }

    .compare-table tr:hover td {
      background: #fafafa;
    }

    .highlight-col {
      background: #fffbf0;
      font-weight: 800;
      color: var(--c-accent);
    }

    /* Token 比价看板 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .token-card {
      background: #ffffff;
      border: 3px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-solid);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .token-head {
      border-bottom: 2px dashed var(--border-color);
      padding-bottom: 12px;
      margin-bottom: 14px;
    }

    .token-head h4 {
      font-size: 1.2rem;
      font-weight: 900;
    }

    .token-cost {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--c-accent);
      margin: 10px 0;
    }

    .token-list {
      list-style: none;
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 16px;
    }

    .token-list li {
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .token-list li::before {
      content: '✓';
      font-weight: 900;
      color: var(--c-teal);
    }

    /* 客户评论区（真实可信6条） */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .review-card {
      background: #ffffff;
      border: 3px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-solid);
      padding: 22px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.6;
      position: relative;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1.5px dashed var(--border-color);
      padding-top: 12px;
    }

    .avatar-shape {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      border: 2px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.1rem;
      color: #ffffff;
    }

    .author-meta h5 {
      font-size: 0.95rem;
      font-weight: 900;
    }

    .author-meta p {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ 折叠面板 */
    .faq-wrapper {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: 3px 3px 0px var(--border-color);
      overflow: hidden;
      transition: all 0.2s ease;
    }

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 800;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-icon {
      font-size: 1.3rem;
      font-weight: 900;
      transition: transform 0.2s;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 24px;
      transition: max-height 0.25s ease-out, padding 0.25s ease-out;
      background: #fffdfa;
      border-top: 1px dashed transparent;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      padding: 16px 24px 22px 24px;
      border-top-color: var(--border-color);
      max-height: 260px;
    }

    /* 需求匹配表单与联系区 */
    .form-contact-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #ffffff;
      border: 3px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-solid);
      padding: 40px;
    }

    .form-side h3, .contact-side h3 {
      font-size: 1.6rem;
      font-weight: 900;
      margin-bottom: 12px;
    }

    .custom-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group label {
      font-size: 0.9rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
      padding: 12px 14px;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-family: inherit;
      background: var(--bg-base);
      outline: none;
      transition: border-color 0.2s;
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--c-accent);
      background: #ffffff;
    }

    .btn-submit {
      padding: 14px 20px;
      background: var(--c-accent);
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 900;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-sm);
      box-shadow: 3px 3px 0px var(--border-color);
      cursor: pointer;
      transition: all 0.15s;
    }

    .btn-submit:hover {
      transform: translate(-2px, -2px);
      box-shadow: 5px 5px 0px var(--border-color);
    }

    .contact-card-box {
      background: var(--bg-subtle);
      border: 2px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .qr-row {
      display: flex;
      align-items: center;
      gap: 20px;
      margin: 18px 0;
      padding: 16px;
      background: #ffffff;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-sm);
    }

    .qr-container {
      width: 108px;
      height: 108px;
      border: 1.5px solid var(--border-color);
      padding: 4px;
      background: #fff;
    }

    .qr-container img {
      width: 100%;
      height: 100%;
      display: block;
      object-fit: contain;
    }

    .meta-list {
      list-style: none;
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.9;
    }

    .meta-list strong {
      color: var(--text-main);
    }

    /* 行业资讯 & 资源导航 */
    .resource-box {
      background: #ffffff;
      border: 3px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-solid);
      padding: 24px;
    }

    .article-links-list {
      list-style: none;
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 14px;
    }

    .article-links-list a {
      display: inline-block;
      padding: 8px 16px;
      background: var(--bg-subtle);
      border: 2px solid var(--border-color);
      border-radius: var(--radius-sm);
      color: var(--text-main);
      text-decoration: none;
      font-size: 0.88rem;
      font-weight: 800;
      transition: all 0.15s;
    }

    .article-links-list a:hover {
      background: var(--c-yellow);
      transform: translateY(-2px);
    }

    /* 友情链接区 */
    .links-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 16px;
    }

    .links-grid a {
      font-size: 0.88rem;
      font-weight: 700;
      padding: 6px 14px;
      background: #ffffff;
      border: 1.5px solid var(--border-color);
      border-radius: 4px;
      color: var(--text-main);
      text-decoration: none;
      transition: all 0.15s;
    }

    .links-grid a:hover {
      background: var(--c-sky);
      color: #000;
    }

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 3px solid var(--border-color);
      padding: 40px 0 30px 0;
      color: var(--text-main);
    }

    .footer-content {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 30px;
      margin-bottom: 24px;
    }

    .footer-brand {
      max-width: 420px;
    }

    .footer-brand p {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-top: 10px;
    }

    .footer-copy {
      border-top: 2px dashed var(--border-color);
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
      color: var(--text-light);
      font-weight: 600;
    }

    /* 悬浮客服面板 */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--c-accent);
      color: #ffffff;
      border: 2px solid var(--border-color);
      box-shadow: 2px 2px 0px var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      text-decoration: none;
      cursor: pointer;
      transition: all 0.2s;
    }

    .float-btn:hover {
      transform: scale(1.08);
      background: #ff3a08;
    }

    .back-top-btn {
      background: var(--c-yellow);
      color: var(--text-main);
      display: none;
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-wrapper {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .showcase-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .token-grid {
        grid-template-columns: 1fr;
      }
      .review-grid {
        grid-template-columns: 1fr;
      }
      .form-contact-wrap {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .hero-h1 {
        font-size: 2.1rem;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 2px solid var(--border-color);
        flex-direction: column;
        padding: 16px 20px;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        padding: 12px;
        border-bottom: 1px dashed var(--border-color);
      }
      .mobile-menu-btn {
        display: block;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .flow-steps {
        grid-template-columns: 1fr;
      }
      .showcase-grid {
        grid-template-columns: 1fr;
      }
      .engine-matrix {
        grid-template-columns: 1fr;
      }
      .form-contact-wrap {
        padding: 24px;
      }
    }