:root {
      --bg-cream: #faf8f5;
      --bg-surface: #ffffff;
      --ink-dark: #1e2229;
      --ink-muted: #5a6270;
      --ink-soft: #8a94a6;
      --graffiti-yellow: #ffdf40;
      --graffiti-cyan: #00e5ff;
      --graffiti-pink: #ff3377;
      --graffiti-lime: #00e676;
      --graffiti-purple: #7c4dff;
      --border-ink: #1e2229;
      --shadow-block: 4px 4px 0px #1e2229;
      --shadow-block-lg: 7px 7px 0px #1e2229;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      background-color: var(--bg-cream);
      background-image: 
        radial-gradient(#1e2229 0.75px, transparent 0.75px),
        radial-gradient(#ff3377 0.75px, var(--bg-cream) 0.75px);
      background-size: 32px 32px;
      background-position: 0 0, 16px 16px;
      color: var(--ink-dark);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.2s ease;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(250, 248, 245, 0.94);
      backdrop-filter: blur(8px);
      border-bottom: 3px solid var(--border-ink);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 1.3rem;
      font-weight: 900;
      letter-spacing: -0.5px;
      text-transform: uppercase;
      background: var(--graffiti-yellow);
      padding: 3px 8px;
      border: 2px solid var(--border-ink);
      box-shadow: 2px 2px 0 var(--border-ink);
      transform: rotate(-1deg);
    }

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

    .nav-links li a {
      font-weight: 700;
      font-size: 0.96rem;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      display: inline-block;
      border: 2px solid transparent;
    }

    .nav-links li a:hover {
      background: var(--graffiti-cyan);
      border-color: var(--border-ink);
      box-shadow: 2px 2px 0 var(--border-ink);
      transform: translateY(-2px);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.95rem;
      padding: 10px 20px;
      border-radius: var(--radius-md);
      border: 2px solid var(--border-ink);
      box-shadow: var(--shadow-block);
      cursor: pointer;
      text-align: center;
      transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.2s ease;
    }

    .btn:hover {
      transform: translate(-2px, -2px);
      box-shadow: 6px 6px 0 var(--border-ink);
    }

    .btn:active {
      transform: translate(2px, 2px);
      box-shadow: 1px 1px 0 var(--border-ink);
    }

    .btn-primary {
      background: var(--graffiti-yellow);
      color: var(--ink-dark);
    }

    .btn-hot {
      background: var(--graffiti-pink);
      color: #ffffff;
    }

    .btn-cyan {
      background: var(--graffiti-cyan);
      color: var(--ink-dark);
    }

    .btn-lime {
      background: var(--graffiti-lime);
      color: var(--ink-dark);
    }

    .mobile-menu-toggle {
      display: none;
      background: #fff;
      border: 2px solid var(--border-ink);
      border-radius: 8px;
      padding: 6px 10px;
      font-size: 1.2rem;
      cursor: pointer;
      font-weight: bold;
    }

    /* 首屏无图极客风 */
    .hero-section {
      padding: 68px 0 54px;
      position: relative;
    }

    .hero-badge-tag {
      display: inline-block;
      background: var(--graffiti-pink);
      color: #fff;
      font-weight: 800;
      font-size: 0.88rem;
      padding: 4px 14px;
      border-radius: 20px;
      border: 2px solid var(--border-ink);
      box-shadow: 3px 3px 0 var(--border-ink);
      transform: rotate(-1.5deg);
      margin-bottom: 18px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 36px;
      align-items: stretch;
    }

    .hero-content {
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .hero-title {
      font-size: 2.75rem;
      line-height: 1.22;
      font-weight: 900;
      color: var(--ink-dark);
      letter-spacing: -0.8px;
      margin-bottom: 20px;
    }

    .hero-title .spray-highlight {
      background: linear-gradient(180deg, transparent 55%, var(--graffiti-yellow) 55%);
      padding: 0 4px;
    }

    .hero-desc {
      font-size: 1.1rem;
      color: var(--ink-muted);
      margin-bottom: 28px;
      line-height: 1.7;
      font-weight: 500;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 30px;
    }

    .hero-highlights-strip {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .pill-tag {
      background: #ffffff;
      border: 2px solid var(--border-ink);
      border-radius: 24px;
      padding: 6px 14px;
      font-size: 0.86rem;
      font-weight: 700;
      box-shadow: 2px 2px 0 var(--border-ink);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .hero-control-card {
      background: #ffffff;
      border: 3px solid var(--border-ink);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-block-lg);
      position: relative;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .card-graffiti-accent {
      position: absolute;
      top: -14px;
      right: 20px;
      background: var(--graffiti-lime);
      border: 2px solid var(--border-ink);
      padding: 4px 12px;
      font-size: 0.82rem;
      font-weight: 900;
      box-shadow: 3px 3px 0 var(--border-ink);
      transform: rotate(2deg);
    }

    .stats-matrix {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin: 18px 0;
    }

    .matrix-box {
      border: 2px solid var(--border-ink);
      padding: 14px;
      border-radius: var(--radius-sm);
      background: var(--bg-cream);
    }

    .matrix-num {
      font-size: 1.8rem;
      font-weight: 900;
      display: block;
      line-height: 1.1;
      color: var(--ink-dark);
    }

    .matrix-label {
      font-size: 0.85rem;
      color: var(--ink-muted);
      font-weight: 700;
    }

    .model-chip-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 7px;
      margin-top: 14px;
    }

    .model-chip {
      background: #fff;
      border: 1.5px solid var(--border-ink);
      border-radius: 6px;
      padding: 3px 8px;
      font-size: 0.78rem;
      font-weight: 800;
    }

    /* 模块通用头 */
    .section-wrap {
      padding: 70px 0;
      border-top: 3px solid var(--border-ink);
    }

    .section-head {
      margin-bottom: 40px;
      text-align: center;
      position: relative;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 900;
      padding: 3px 12px;
      background: var(--graffiti-cyan);
      border: 2px solid var(--border-ink);
      border-radius: 20px;
      box-shadow: 2px 2px 0 var(--border-ink);
      margin-bottom: 12px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 900;
      color: var(--ink-dark);
      letter-spacing: -0.5px;
    }

    .section-subtitle {
      font-size: 1.02rem;
      color: var(--ink-muted);
      max-width: 680px;
      margin: 8px auto 0;
      font-weight: 500;
    }

    /* 涂鸦风格卡片 */
    .graffiti-card {
      background: #ffffff;
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-block);
      padding: 24px;
      transition: all 0.2s ease;
      position: relative;
    }

    .graffiti-card:hover {
      transform: translate(-3px, -3px);
      box-shadow: 7px 7px 0 var(--border-ink);
    }

    /* 网格布局 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 26px;
    }

    /* 场景卡片特色 */
    .scene-card-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      border: 2px solid var(--border-ink);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 16px;
      box-shadow: 2px 2px 0 var(--border-ink);
    }

    .scene-title {
      font-size: 1.15rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .scene-desc {
      font-size: 0.9rem;
      color: var(--ink-muted);
      line-height: 1.55;
    }

    /* 平台特色图文卡片 */
    .media-card {
      background: #ffffff;
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-block);
    }

    .media-img-holder {
      aspect-ratio: 16/9;
      background: #eee;
      border-bottom: 2px solid var(--border-ink);
      overflow: hidden;
    }

    .media-img-holder.square-ratio {
      aspect-ratio: 1/1;
    }

    .media-img-holder img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

    .media-card:hover .media-img-holder img {
      transform: scale(1.04);
    }

    .media-body {
      padding: 18px;
    }

    /* 对比表格 */
    .compare-container {
      background: #fff;
      border: 3px solid var(--border-ink);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-block-lg);
      overflow: hidden;
    }

    .eval-highlight-strip {
      background: var(--graffiti-yellow);
      border-bottom: 3px solid var(--border-ink);
      padding: 18px 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

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

    .eval-score-num {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1;
    }

    .eval-stars {
      color: var(--graffiti-pink);
      font-size: 1.4rem;
      letter-spacing: 2px;
      text-shadow: 1px 1px 0 var(--border-ink);
    }

    .table-scroll-wrap {
      overflow-x: auto;
      width: 100%;
    }

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

    table.compare-table th, 
    table.compare-table td {
      padding: 16px 20px;
      border-bottom: 1.5px solid #e1e4ea;
      font-size: 0.94rem;
    }

    table.compare-table thead th {
      background: var(--bg-cream);
      font-weight: 900;
      border-bottom: 2px solid var(--border-ink);
    }

    table.compare-table tbody tr:hover {
      background: #fbfbfa;
    }

    .badge-adv {
      display: inline-block;
      background: var(--graffiti-lime);
      border: 1.5px solid var(--border-ink);
      font-size: 0.8rem;
      padding: 2px 8px;
      font-weight: 800;
      border-radius: 4px;
    }

    /* 流程卡片 */
    .step-track {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      position: relative;
    }

    .step-card {
      background: #fff;
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-block);
      position: relative;
    }

    .step-num {
      width: 32px;
      height: 32px;
      background: var(--graffiti-yellow);
      border: 2px solid var(--border-ink);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      margin-bottom: 12px;
    }

    /* FAQ 折叠组件 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-question {
      padding: 16px 22px;
      font-size: 1.05rem;
      font-weight: 800;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #fff;
      user-select: none;
    }

    .faq-toggle-icon {
      font-size: 1.2rem;
      font-weight: 900;
      transition: transform 0.2s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1), padding 0.25s ease;
      background: var(--bg-cream);
      padding: 0 22px;
      font-size: 0.94rem;
      color: var(--ink-muted);
      border-top: 0px solid transparent;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 14px 22px 18px;
      border-top: 1.5px dashed var(--border-ink);
    }

    /* 评论卡片 */
    .review-user-row {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }

    .avatar-sketch {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      border: 2px solid var(--border-ink);
      background: var(--graffiti-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.1rem;
    }

    /* 表单组件 */
    .form-panel {
      background: #ffffff;
      border: 3px solid var(--border-ink);
      border-radius: var(--radius-lg);
      padding: 34px;
      box-shadow: var(--shadow-block-lg);
      max-width: 760px;
      margin: 0 auto;
    }

    .form-row {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-weight: 800;
      margin-bottom: 6px;
      font-size: 0.95rem;
    }

    .form-control {
      width: 100%;
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-sm);
      padding: 12px 14px;
      font-size: 0.95rem;
      font-family: inherit;
      background: var(--bg-cream);
      outline: none;
      transition: all 0.2s ease;
    }

    .form-control:focus {
      background: #fff;
      box-shadow: 3px 3px 0 var(--border-ink);
    }

    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }

    /* Banner条与资讯展示 */
    .banner-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 18px;
      margin: 28px 0;
    }

    .banner-item {
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-block);
      background: #fff;
    }

    .banner-item img {
      width: 100%;
      height: auto;
      display: block;
    }

    .article-links-strip {
      background: #fff;
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-md);
      padding: 18px 24px;
      box-shadow: var(--shadow-block);
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
    }

    .article-tag-item {
      font-size: 0.9rem;
      font-weight: 700;
      padding: 4px 10px;
      border: 1.5px solid var(--border-ink);
      border-radius: 6px;
      background: var(--bg-cream);
    }

    .article-tag-item:hover {
      background: var(--graffiti-yellow);
    }

    /* 浮动工具栏 */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 28px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      border: 2px solid var(--border-ink);
      background: #fff;
      box-shadow: var(--shadow-block);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      cursor: pointer;
      position: relative;
    }

    .float-btn:hover {
      transform: scale(1.08);
      background: var(--graffiti-yellow);
    }

    .float-qr-popup {
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #fff;
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-block);
      padding: 12px;
      display: none;
      width: 160px;
      text-align: center;
    }

    .float-qr-popup img {
      width: 100%;
      height: auto;
      display: block;
    }

    .float-btn:hover .float-qr-popup {
      display: block;
    }

    /* 底部专属统一 */
    footer.site-footer {
      background: #ffffff;
      border-top: 3px solid var(--border-ink);
      padding: 48px 0 28px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 32px;
      margin-bottom: 36px;
    }

    .footer-col h4 {
      font-size: 1.1rem;
      font-weight: 900;
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }

    .footer-col h4::after {
      content: "";
      position: absolute;
      bottom: -3px;
      left: 0;
      width: 100%;
      height: 4px;
      background: var(--graffiti-yellow);
      z-index: -1;
    }

    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-col ul li a {
      font-size: 0.92rem;
      color: var(--ink-muted);
      font-weight: 600;
    }

    .footer-col ul li a:hover {
      color: var(--ink-dark);
      text-decoration: underline;
    }

    .footer-qr-card {
      border: 2px solid var(--border-ink);
      border-radius: var(--radius-sm);
      padding: 10px;
      background: var(--bg-cream);
      max-width: 140px;
      margin-top: 10px;
    }

    .footer-qr-card img {
      width: 100%;
      height: auto;
      display: block;
    }

    .friend-links-box {
      border-top: 2px dashed #d5d9e2;
      padding-top: 20px;
      margin-top: 20px;
      font-size: 0.88rem;
    }

    .friend-links-box a {
      margin-right: 14px;
      color: var(--ink-muted);
      font-weight: 600;
      display: inline-block;
      margin-bottom: 6px;
    }

    .friend-links-box a:hover {
      color: var(--graffiti-pink);
    }

    .copyright-bar {
      border-top: 2px solid var(--border-ink);
      padding-top: 20px;
      margin-top: 24px;
      text-align: center;
      font-size: 0.86rem;
      color: var(--ink-muted);
      font-weight: 600;
    }

    /* 移动端适配 */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .step-track {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .banner-row {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: var(--bg-cream);
        flex-direction: column;
        align-items: stretch;
        border-bottom: 3px solid var(--border-ink);
        box-shadow: 0 8px 16px rgba(0,0,0,0.1);
        padding: 14px 20px;
      }
      .nav-links.active {
        display: flex;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .grid-3, .grid-2, .grid-4, .step-track, .footer-grid {
        grid-template-columns: 1fr;
      }
      .stats-matrix {
        grid-template-columns: 1fr;
      }
      .header-inner {
        padding: 0 8px;
      }
    }