:root {
      --c-bg: #faf8f5;
      --c-surface: #ffffff;
      --c-ink: #18181b;
      --c-sub: #52525b;
      --c-border: #18181b;
      --c-yellow: #ffe600;
      --c-pink: #ff4365;
      --c-cyan: #00d2d3;
      --c-lime: #10ac84;
      --c-purple: #5f27cd;
      --c-orange: #ff9f43;
      --shadow-solid: 4px 4px 0px #18181b;
      --shadow-hover: 6px 6px 0px #18181b;
      --shadow-active: 1px 1px 0px #18181b;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      background-color: var(--c-bg);
      color: var(--c-ink);
      font-family: var(--font-stack);
      line-height: 1.6;
      background-image: 
        radial-gradient(#18181b 0.75px, transparent 0.75px), 
        radial-gradient(#18181b 0.75px, var(--c-bg) 0.75px);
      background-size: 30px 30px;
      background-position: 0 0, 15px 15px;
      overflow-x: hidden;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    .main-container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--c-yellow);
      border: 2px solid var(--c-border);
      color: var(--c-ink);
      font-weight: 800;
      font-size: 0.85rem;
      padding: 4px 12px;
      border-radius: 999px;
      box-shadow: 2px 2px 0 var(--c-border);
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 800;
      font-size: 1rem;
      padding: 12px 24px;
      border-radius: var(--radius-md);
      border: 2px solid var(--c-border);
      cursor: pointer;
      transition: all 0.15s ease;
      text-align: center;
      box-shadow: var(--shadow-solid);
      text-decoration: none;
    }
    .btn:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-hover);
    }
    .btn:active {
      transform: translate(2px, 2px);
      box-shadow: var(--shadow-active);
    }
    .btn-primary {
      background: var(--c-yellow);
      color: var(--c-ink);
    }
    .btn-action {
      background: var(--c-pink);
      color: #fff;
    }
    .btn-alt {
      background: var(--c-surface);
      color: var(--c-ink);
    }
    .btn-cyan {
      background: var(--c-cyan);
      color: var(--c-ink);
    }
    .section-title-wrap {
      text-align: center;
      margin-bottom: 40px;
    }
    .section-title-wrap h2 {
      font-size: 2.2rem;
      font-weight: 900;
      letter-spacing: -0.5px;
      margin: 10px 0 6px;
      display: inline-block;
      position: relative;
    }
    .section-title-wrap p {
      color: var(--c-sub);
      font-size: 1.05rem;
      font-weight: 500;
    }
    .card-neo {
      background: var(--c-surface);
      border: 2px solid var(--c-border);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-solid);
      transition: all 0.2s ease;
      position: relative;
    }
    .card-neo:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(250, 248, 245, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--c-border);
    }
    .header-inner {
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1.3rem;
      font-weight: 900;
    }
    .logo-container {
      height: 42px;
      display: flex;
      align-items: center;
    }
    .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }
    .nav-links a {
      font-weight: 700;
      font-size: 0.95rem;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: background 0.15s ease;
    }
    .nav-links a:hover {
      background: var(--c-yellow);
      border: 1px solid var(--c-border);
    }
    .header-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .menu-toggle {
      display: none;
      background: var(--c-yellow);
      border: 2px solid var(--c-border);
      padding: 8px 12px;
      font-weight: 900;
      border-radius: var(--radius-sm);
      box-shadow: 2px 2px 0 var(--c-border);
      cursor: pointer;
    }
    .hero-section {
      padding: 60px 0 50px;
      position: relative;
    }
    .hero-box {
      background: var(--c-surface);
      border: 3px solid var(--c-border);
      border-radius: var(--radius-lg);
      padding: 48px 36px;
      box-shadow: 8px 8px 0 var(--c-border);
      position: relative;
      overflow: hidden;
    }
    .hero-box::before {
      content: "";
      position: absolute;
      top: -30px;
      right: -30px;
      width: 140px;
      height: 140px;
      background: var(--c-cyan);
      border-radius: 50%;
      border: 3px solid var(--c-border);
      z-index: 0;
    }
    .hero-box::after {
      content: "";
      position: absolute;
      bottom: -20px;
      left: 30%;
      width: 80px;
      height: 80px;
      background: var(--c-yellow);
      transform: rotate(45deg);
      border: 3px solid var(--c-border);
      z-index: 0;
    }
    .hero-content {
      position: relative;
      z-index: 1;
      max-width: 900px;
      margin: 0 auto;
      text-align: center;
    }
    .hero-h1 {
      font-size: 2.6rem;
      font-weight: 950;
      line-height: 1.25;
      margin: 18px 0 16px;
      color: var(--c-ink);
      letter-spacing: -0.5px;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--c-sub);
      font-weight: 600;
      max-width: 760px;
      margin: 0 auto 30px;
    }
    .hero-btn-group {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px;
      margin-bottom: 36px;
    }
    .hero-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      padding-top: 16px;
      border-top: 2px dashed #d4d4d8;
    }
    .tag-item {
      background: #f4f4f5;
      border: 1px solid var(--c-border);
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 0.8rem;
      font-weight: 700;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 36px;
    }
    .stat-card {
      background: var(--c-surface);
      border: 2px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 18px;
      text-align: center;
      box-shadow: var(--shadow-solid);
    }
    .stat-val {
      font-size: 2rem;
      font-weight: 900;
      line-height: 1.1;
      color: var(--c-pink);
    }
    .stat-lbl {
      font-size: 0.88rem;
      color: var(--c-sub);
      font-weight: 700;
      margin-top: 4px;
    }
    .sec-pad {
      padding: 50px 0;
    }
    .platform-intro-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 28px;
      align-items: stretch;
    }
    .intro-feature-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
      margin-top: 20px;
    }
    .intro-feat-item {
      background: #fff;
      border: 2px solid var(--c-border);
      border-radius: var(--radius-sm);
      padding: 12px 14px;
      box-shadow: 2px 2px 0 var(--c-border);
    }
    .intro-feat-item h4 {
      font-size: 0.95rem;
      font-weight: 800;
      margin-bottom: 4px;
    }
    .intro-feat-item p {
      font-size: 0.82rem;
      color: var(--c-sub);
    }
    .intro-models-box {
      background: var(--c-surface);
      border: 2px solid var(--c-border);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-solid);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .model-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 14px;
    }
    .model-chip {
      background: var(--c-yellow);
      border: 1.5px solid var(--c-border);
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 0.78rem;
      font-weight: 800;
    }
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 20px;
    }
    .service-card {
      background: var(--c-surface);
      border: 2px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-solid);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.2s ease;
    }
    .service-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
    }
    .service-head {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 10px;
    }
    .service-tag {
      font-size: 0.75rem;
      font-weight: 800;
      padding: 2px 8px;
      border-radius: 4px;
      border: 1px solid var(--c-border);
      background: var(--c-cyan);
    }
    .service-card h3 {
      font-size: 1.15rem;
      font-weight: 850;
    }
    .service-card p {
      font-size: 0.88rem;
      color: var(--c-sub);
      margin-bottom: 12px;
      flex-grow: 1;
    }
    .service-foot {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--c-ink);
      border-top: 1px dashed #e4e4e7;
      padding-top: 8px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .banner-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 24px;
    }
    .banner-img-item {
      background: #fff;
      border: 2px solid var(--c-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-solid);
    }
    .banner-img-item img {
      width: 100%;
      height: 160px;
      object-fit: cover;
      display: block;
    }
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      position: relative;
    }
    .step-card {
      background: var(--c-surface);
      border: 2px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-solid);
      position: relative;
    }
    .step-num {
      width: 32px;
      height: 32px;
      background: var(--c-pink);
      color: #fff;
      border: 2px solid var(--c-border);
      font-weight: 900;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 12px;
    }
    .step-card h3 {
      font-size: 1.05rem;
      font-weight: 850;
      margin-bottom: 6px;
    }
    .step-card p {
      font-size: 0.85rem;
      color: var(--c-sub);
    }
    .eval-box {
      background: var(--c-surface);
      border: 3px solid var(--c-border);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: 6px 6px 0 var(--c-border);
    }
    .eval-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      padding-bottom: 20px;
      border-bottom: 2px solid var(--c-border);
      margin-bottom: 20px;
    }
    .eval-score-box {
      display: flex;
      align-items: center;
      gap: 16px;
      background: var(--c-yellow);
      border: 2px solid var(--c-border);
      padding: 12px 20px;
      border-radius: var(--radius-md);
      box-shadow: 3px 3px 0 var(--c-border);
    }
    .eval-score-num {
      font-size: 2.2rem;
      font-weight: 950;
      line-height: 1;
    }
    .eval-score-detail {
      font-size: 0.85rem;
      font-weight: 800;
    }
    .eval-table-wrap {
      overflow-x: auto;
    }
    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .eval-table th, .eval-table td {
      padding: 14px 16px;
      border: 1px solid var(--c-border);
      font-size: 0.92rem;
    }
    .eval-table th {
      background: #f4f4f5;
      font-weight: 850;
    }
    .eval-table tr:nth-child(even) {
      background: #fafafa;
    }
    .eval-highlight {
      background: rgba(255, 230, 0, 0.25) !important;
      font-weight: 700;
    }
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .case-card {
      background: var(--c-surface);
      border: 2px solid var(--c-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-solid);
      display: flex;
      flex-direction: column;
    }
    .case-media-wrap {
      border-bottom: 2px solid var(--c-border);
      background: #000;
      height: 190px;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }
    .case-media-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .case-body {
      padding: 18px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .case-body h3 {
      font-size: 1.1rem;
      font-weight: 850;
      margin-bottom: 8px;
    }
    .case-body p {
      font-size: 0.85rem;
      color: var(--c-sub);
      margin-bottom: 12px;
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .review-card {
      background: var(--c-surface);
      border: 2px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-solid);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 14px;
      padding-top: 10px;
      border-top: 1px dashed #e4e4e7;
    }
    .review-avatar-char {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: var(--c-cyan);
      border: 2px solid var(--c-border);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 0.95rem;
    }
    .review-meta h4 {
      font-size: 0.9rem;
      font-weight: 850;
    }
    .review-meta span {
      font-size: 0.78rem;
      color: var(--c-sub);
    }
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      max-width: 960px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--c-surface);
      border: 2px solid var(--c-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 2px 2px 0 var(--c-border);
      transition: all 0.15s ease;
    }
    .faq-question {
      padding: 16px 20px;
      font-weight: 850;
      font-size: 1rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }
    .faq-question::after {
      content: "+";
      font-size: 1.3rem;
      font-weight: 900;
      transition: transform 0.2s;
    }
    .faq-item.active .faq-question::after {
      transform: rotate(45deg);
    }
    .faq-answer {
      display: none;
      padding: 0 20px 16px;
      font-size: 0.9rem;
      color: var(--c-sub);
      border-top: 1px dashed #e4e4e7;
      padding-top: 12px;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .form-section-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 28px;
    }
    .form-box {
      background: var(--c-surface);
      border: 3px solid var(--c-border);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: 6px 6px 0 var(--c-border);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-weight: 800;
      font-size: 0.88rem;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 2px solid var(--c-border);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      font-family: inherit;
      background: #fff;
      outline: none;
    }
    .form-control:focus {
      border-color: var(--c-purple);
      box-shadow: 2px 2px 0 var(--c-purple);
    }
    .contact-info-panel {
      background: var(--c-yellow);
      border: 3px solid var(--c-border);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: 6px 6px 0 var(--c-border);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .contact-card-item {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
    }
    .qr-container {
      background: #fff;
      border: 2px solid var(--c-border);
      padding: 10px;
      border-radius: var(--radius-md);
      display: inline-block;
      text-align: center;
      box-shadow: 3px 3px 0 var(--c-border);
      max-width: 150px;
    }
    .qr-container img {
      width: 100%;
      height: auto;
      display: block;
    }
    .articles-section-box {
      background: var(--c-surface);
      border: 2px solid var(--c-border);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-solid);
      margin-top: 30px;
    }
    .article-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 14px;
    }
    .art-pill {
      background: #f4f4f5;
      border: 1px solid var(--c-border);
      padding: 6px 14px;
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 700;
      transition: all 0.15s ease;
    }
    .art-pill:hover {
      background: var(--c-cyan);
      box-shadow: 2px 2px 0 var(--c-border);
    }
    .friend-links-box {
      background: #fff;
      border: 2px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 18px 24px;
      box-shadow: var(--shadow-solid);
      margin-top: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 12px;
    }
    .friend-links-box a {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--c-sub);
      text-decoration: underline;
    }
    .friend-links-box a:hover {
      color: var(--c-pink);
    }
    .site-footer {
      background: #18181b;
      color: #faf8f5;
      border-top: 3px solid var(--c-border);
      padding: 40px 0 24px;
      margin-top: 50px;
    }
    .footer-inner {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 30px;
      padding-bottom: 24px;
      border-bottom: 1px solid #3f3f46;
    }
    .footer-brand h3 {
      font-size: 1.4rem;
      font-weight: 900;
      margin-bottom: 10px;
      color: var(--c-yellow);
    }
    .footer-brand p {
      font-size: 0.88rem;
      color: #a1a1aa;
      max-width: 360px;
    }
    .footer-col h4 {
      font-size: 1rem;
      font-weight: 800;
      margin-bottom: 12px;
      color: #fff;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-col a {
      font-size: 0.85rem;
      color: #a1a1aa;
      transition: color 0.15s;
    }
    .footer-col a:hover {
      color: var(--c-yellow);
    }
    .footer-bottom {
      padding-top: 20px;
      text-align: center;
      font-size: 0.82rem;
      color: #71717a;
    }
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 25px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--c-yellow);
      border: 2px solid var(--c-border);
      box-shadow: 3px 3px 0 var(--c-border);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-weight: 900;
      font-size: 0.85rem;
      transition: all 0.15s ease;
    }
    .float-btn:hover {
      transform: translate(-2px, -2px);
      box-shadow: 5px 5px 0 var(--c-border);
    }
    @media (max-width: 992px) {
      .stats-grid, .banner-grid, .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .platform-intro-grid, .form-section-grid, .footer-inner {
        grid-template-columns: 1fr;
      }
      .cases-grid, .reviews-grid {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .hero-h1 {
        font-size: 1.85rem;
      }
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--c-bg);
        border-bottom: 2px solid var(--c-border);
        padding: 16px 20px;
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
      }
      .nav-links.show {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .intro-feature-list {
        grid-template-columns: 1fr;
      }
      .stats-grid, .banner-grid, .process-steps {
        grid-template-columns: 1fr;
      }
    }