:root {
      --bg-page: #f6f8fd;
      --bg-card: #ffffff;
      --text-main: #141c2e;
      --text-muted: #5e6d8a;
      --neon-cyan: #00e5ff;
      --neon-pink: #ff007f;
      --neon-purple: #7928ca;
      --neon-blue: #0070f3;
      --neon-green: #00df8f;
      --border-light: rgba(121, 40, 202, 0.12);
      --card-shadow: 0 10px 30px rgba(20, 28, 46, 0.05);
      --hover-shadow: 0 16px 36px rgba(0, 112, 243, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --transition: all 0.28s ease;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(circle at 10% 10%, rgba(0, 229, 255, 0.04) 0%, transparent 30%),
                  radial-gradient(circle at 90% 40%, rgba(255, 0, 127, 0.03) 0%, transparent 35%),
                  radial-gradient(circle at 50% 80%, rgba(121, 40, 202, 0.03) 0%, transparent 40%),
                  var(--bg-page);
      min-height: 100vh;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .section {
      padding: 70px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      margin-bottom: 44px;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      border-radius: 99px;
      font-size: 13px;
      font-weight: 600;
      color: var(--neon-purple);
      background: linear-gradient(135deg, rgba(0, 229, 255, 0.12), rgba(255, 0, 127, 0.12));
      border: 1px solid rgba(121, 40, 202, 0.2);
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 10px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 640px;
      margin: 0 auto;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
    }

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

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

    .brand-wrap .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

    .brand-text {
      font-size: 20px;
      font-weight: 800;
      background: linear-gradient(90deg, var(--neon-purple), var(--neon-pink));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

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

    .nav-links li a {
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover {
      color: var(--neon-purple);
      background: rgba(121, 40, 202, 0.06);
    }

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

    .btn-neon-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 600;
      color: #fff;
      background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
      border: 1px solid rgba(255, 255, 255, 0.3);
      border-radius: var(--radius-md);
      box-shadow: 0 4px 14px rgba(0, 112, 243, 0.35);
      cursor: pointer;
    }

    .btn-neon-primary:hover {
      background: linear-gradient(135deg, var(--neon-pink), var(--neon-purple));
      box-shadow: 0 6px 20px rgba(255, 0, 127, 0.4);
      transform: translateY(-1px);
    }

    .btn-neon-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 14px;
      font-weight: 600;
      color: var(--neon-purple);
      background: #fff;
      border: 1px solid rgba(121, 40, 202, 0.3);
      border-radius: var(--radius-md);
      box-shadow: 0 2px 8px rgba(0,0,0,0.03);
    }

    .btn-neon-outline:hover {
      border-color: var(--neon-pink);
      color: var(--neon-pink);
      background: rgba(255, 0, 127, 0.04);
    }

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 首屏 Hero (禁止出现图片) */
    .hero-section {
      padding: 80px 0 60px;
      text-align: center;
      position: relative;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      border-radius: 99px;
      background: #ffffff;
      border: 1px solid rgba(0, 229, 255, 0.4);
      box-shadow: 0 4px 16px rgba(0, 229, 255, 0.15);
      font-size: 13px;
      font-weight: 600;
      color: var(--neon-blue);
      margin-bottom: 24px;
    }

    .hero-tag-dot {
      width: 8px;
      height: 8px;
      background: var(--neon-green);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--neon-green);
    }

    .hero-title {
      font-size: 42px;
      line-height: 1.25;
      font-weight: 900;
      margin-bottom: 20px;
      color: var(--text-main);
    }

    .hero-highlight {
      background: linear-gradient(135deg, #0070f3, #7928ca, #ff007f);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 17px;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    .hero-buttons {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }

    .hero-buttons .btn-neon-primary {
      padding: 14px 34px;
      font-size: 16px;
    }

    .hero-buttons .btn-neon-outline {
      padding: 14px 28px;
      font-size: 16px;
    }

    .hero-indicators {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      max-width: 960px;
      margin: 0 auto;
    }

    .indicator-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 20px 16px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .indicator-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
      opacity: 0;
      transition: var(--transition);
    }

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

    .indicator-card:hover::before {
      opacity: 1;
    }

    .indicator-val {
      font-size: 26px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .indicator-val span {
      color: var(--neon-pink);
      font-size: 18px;
    }

    .indicator-lbl {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 平台介绍 & 核心优势 */
    .grid-2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: center;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
    }

    .feature-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--hover-shadow);
      border-color: rgba(0, 112, 243, 0.3);
    }

    .feature-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(0, 229, 255, 0.15), rgba(121, 40, 202, 0.15));
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--neon-purple);
      font-size: 20px;
      font-weight: bold;
      margin-bottom: 18px;
    }

    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 多模型生态徽章区 */
    .model-pills-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      padding: 20px;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px dashed rgba(121, 40, 202, 0.25);
      margin-top: 24px;
    }

    .model-pill {
      padding: 6px 14px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      background: rgba(0, 112, 243, 0.05);
      border: 1px solid rgba(0, 112, 243, 0.15);
      border-radius: 99px;
      transition: var(--transition);
    }

    .model-pill:hover {
      background: var(--neon-purple);
      color: #ffffff;
      border-color: var(--neon-purple);
      transform: scale(1.05);
    }

    /* 场景矩阵 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .scenario-item {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .scenario-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .scenario-title::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--neon-pink);
    }

    .scenario-desc {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 流程与步骤 */
    .process-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      position: relative;
      box-shadow: var(--card-shadow);
    }

    .step-num {
      width: 40px;
      height: 40px;
      line-height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
      color: #ffffff;
      font-weight: 700;
      font-size: 16px;
      margin: 0 auto 16px;
      box-shadow: 0 4px 10px rgba(0, 112, 243, 0.3);
    }

    .step-card h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 案例中心 */
    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
    }

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16/9;
      background: #f0f2f8;
      overflow: hidden;
    }

    .case-img-wrap.square {
      aspect-ratio: 1/1;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .case-card:hover .case-img-wrap img {
      transform: scale(1.04);
    }

    .case-body {
      padding: 20px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .case-body h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .case-body p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 对比评测板块 */
    .eval-container {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--card-shadow);
    }

    .eval-score-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-light);
      padding-bottom: 20px;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .score-badge-group {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .stars-box {
      color: #ffb800;
      font-size: 18px;
      letter-spacing: 2px;
    }

    .score-number {
      font-size: 28px;
      font-weight: 900;
      color: var(--neon-pink);
    }

    .score-total {
      font-size: 14px;
      color: var(--text-muted);
    }

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

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }

    .eval-table th, .eval-table td {
      padding: 14px 16px;
      font-size: 14px;
      border-bottom: 1px solid #f0f2f8;
    }

    .eval-table th {
      background: #f8fafc;
      color: var(--text-main);
      font-weight: 700;
    }

    .eval-table td.highlight {
      font-weight: 700;
      color: var(--neon-purple);
      background: rgba(121, 40, 202, 0.02);
    }

    /* Token 比价 */
    .price-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .price-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--card-shadow);
      position: relative;
      display: flex;
      flex-direction: column;
    }

    .price-card.featured {
      border: 2px solid var(--neon-blue);
      box-shadow: 0 10px 30px rgba(0, 112, 243, 0.15);
    }

    .price-tag-pop {
      position: absolute;
      top: -12px;
      right: 20px;
      background: linear-gradient(135deg, var(--neon-pink), var(--neon-purple));
      color: #fff;
      font-size: 12px;
      font-weight: 700;
      padding: 2px 10px;
      border-radius: 99px;
    }

    .price-amount {
      font-size: 32px;
      font-weight: 900;
      color: var(--text-main);
      margin: 16px 0 8px;
    }

    .price-amount span {
      font-size: 14px;
      font-weight: 400;
      color: var(--text-muted);
    }

    .price-feature-list {
      list-style: none;
      margin: 20px 0;
      flex: 1;
    }

    .price-feature-list li {
      font-size: 13.5px;
      color: var(--text-muted);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .price-feature-list li::before {
      content: "✓";
      color: var(--neon-green);
      font-weight: bold;
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-content {
      font-size: 13.5px;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 16px;
      font-style: italic;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f0f2f8;
      padding-top: 12px;
    }

    .author-avatar {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-blue));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }

    .author-info h5 {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

    .author-info p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
    }

    .faq-question {
      padding: 18px 22px;
      font-size: 15px;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      color: var(--text-main);
      user-select: none;
    }

    .faq-question:hover {
      color: var(--neon-purple);
    }

    .faq-icon {
      font-size: 18px;
      font-weight: bold;
      color: var(--neon-purple);
      transition: transform 0.3s ease;
    }

    .faq-answer {
      display: none;
      padding: 0 22px 18px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      border-top: 1px solid #f8fafc;
    }

    .faq-item.active .faq-answer {
      display: block;
      padding-top: 12px;
    }

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

    /* 资讯与百科 */
    .article-links-box {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--card-shadow);
    }

    .article-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }

    .article-list li a {
      display: block;
      padding: 12px 16px;
      background: #f8fafc;
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      border-left: 3px solid var(--neon-blue);
      transition: var(--transition);
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .article-list li a:hover {
      background: #ffffff;
      border-left-color: var(--neon-pink);
      box-shadow: 0 4px 12px rgba(0,0,0,0.06);
      transform: translateX(4px);
    }

    /* 表单与联系区 */
    .contact-wrap {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 30px;
    }

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .info-row {
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }

    .info-lbl {
      font-weight: 700;
      color: var(--text-main);
      font-size: 14px;
      min-width: 80px;
    }

    .info-val {
      color: var(--text-muted);
      font-size: 14px;
      word-break: break-all;
    }

    .qr-box {
      width: 130px;
      margin-top: 10px;
      border: 1px dashed var(--border-light);
      padding: 6px;
      border-radius: var(--radius-sm);
    }

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

    .form-box {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--card-shadow);
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 13.5px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid #dbe2ea;
      border-radius: var(--radius-sm);
      font-size: 14px;
      background: #fdfdfe;
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--neon-blue);
      box-shadow: 0 0 0 3px rgba(0, 112, 243, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }

    /* 友情链接与页脚 */
    .links-section {
      background: #ffffff;
      border-top: 1px solid var(--border-light);
      padding: 24px 0;
    }

    .links-inner {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
    }

    .links-label {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

    .links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .links-list a {
      font-size: 13px;
      color: var(--text-muted);
      background: #f4f6fa;
      padding: 4px 10px;
      border-radius: 4px;
    }

    .links-list a:hover {
      color: var(--neon-purple);
      background: #eaeef6;
    }

    .site-footer {
      background: #0d1322;
      color: #94a3b8;
      padding: 40px 0 30px;
      font-size: 13.5px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 30px;
    }

    .footer-desc {
      max-width: 380px;
      line-height: 1.7;
      margin-top: 10px;
      color: #64748b;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 15px;
      margin-bottom: 12px;
      font-weight: 700;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 8px;
    }

    .footer-col ul li a {
      color: #94a3b8;
    }

    .footer-col ul li a:hover {
      color: var(--neon-cyan);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 20px;
      text-align: center;
      color: #64748b;
      font-size: 13px;
    }

    /* 悬浮客服挂件 */
    .float-service {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      box-shadow: 0 4px 14px rgba(0, 112, 243, 0.35);
      cursor: pointer;
      border: none;
      transition: var(--transition);
    }

    .float-btn:hover {
      transform: scale(1.1);
      box-shadow: 0 6px 18px rgba(255, 0, 127, 0.4);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-indicators {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .scenario-grid, .price-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-row, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrap {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .nav-toggle {
        display: block;
      }
      .hero-title {
        font-size: 30px;
      }
      .grid-2, .grid-3, .grid-4, .scenario-grid, .price-grid, .reviews-grid, .process-row, .article-list {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }