:root {
      --c-bg: #f8fafc;
      --c-surface: #ffffff;
      --c-text-main: #0f172a;
      --c-text-muted: #475569;
      --c-text-light: #64748b;
      --c-primary: #3b82f6;
      --c-primary-hover: #2563eb;
      --c-secondary: #8b5cf6;
      --c-accent-cyan: #06b6d4;
      --c-accent-pink: #ec4899;
      --c-accent-orange: #f97316;
      --c-accent-emerald: #10b981;
      --c-border: #e2e8f0;
      --c-border-light: #f1f5f9;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
      --shadow-xl: 0 20px 30px -5px rgba(0, 0, 0, 0.09), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --container-w: 1200px;
      --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--c-bg);
      color: var(--c-text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: var(--container-w);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

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

    a:hover {
      color: var(--c-primary-hover);
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--c-border);
    }

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

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

    .brand-logo-wrap {
      width: 130px;
      display: flex;
      align-items: center;
    }

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

    .nav-desktop {
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--c-text-muted);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--c-primary);
      background: rgba(59, 130, 246, 0.08);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
      text-align: center;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
    }

    .btn-primary:hover {
      box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
      transform: translateY(-1px);
    }

    .btn-outline {
      background: #ffffff;
      color: var(--c-text-main) !important;
      border-color: var(--c-border);
    }

    .btn-outline:hover {
      border-color: var(--c-primary);
      color: var(--c-primary) !important;
      background: rgba(59, 130, 246, 0.04);
    }

    .btn-glow {
      background: linear-gradient(135deg, #f97316 0%, #ec4899 100%);
      color: #ffffff !important;
      box-shadow: 0 4px 15px rgba(236, 72, 153, 0.35);
    }

    .btn-glow:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 20px rgba(236, 72, 153, 0.5);
    }

    .menu-toggle {
      display: none;
      flex-direction: column;
      justify-content: center;
      gap: 5px;
      width: 32px;
      height: 32px;
      background: transparent;
      border: none;
      cursor: pointer;
    }

    .menu-toggle span {
      display: block;
      width: 100%;
      height: 2px;
      background: var(--c-text-main);
      border-radius: 2px;
      transition: var(--transition);
    }

    /* 通用区块排版 */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

    .section-alt {
      background-color: #ffffff;
      border-top: 1px solid var(--c-border-light);
      border-bottom: 1px solid var(--c-border-light);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }

    .section-badge {
      display: inline-block;
      padding: 6px 14px;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      color: #2563eb;
      background: rgba(37, 99, 235, 0.1);
      border-radius: var(--radius-full);
      margin-bottom: 14px;
      border: 1px solid rgba(37, 99, 235, 0.2);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      line-height: 1.3;
      color: var(--c-text-main);
      margin-bottom: 16px;
    }

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

    /* 首屏 Hero (严禁出现图片) */
    .hero-section {
      padding: 90px 0 70px 0;
      background: radial-gradient(circle at 50% 10%, rgba(59, 130, 246, 0.12) 0%, rgba(139, 92, 246, 0.08) 35%, rgba(248, 250, 252, 0) 70%),
                  linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
      border-bottom: 1px solid var(--c-border);
      position: relative;
      overflow: hidden;
    }

    .hero-decor-orb {
      position: absolute;
      width: 320px;
      height: 320px;
      border-radius: 50%;
      filter: blur(80px);
      pointer-events: none;
      opacity: 0.4;
      z-index: 0;
    }

    .hero-orb-1 {
      top: 5%;
      left: 10%;
      background: #38bdf8;
    }

    .hero-orb-2 {
      top: 15%;
      right: 12%;
      background: #f472b6;
    }

    .hero-content {
      position: relative;
      z-index: 1;
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      padding: 8px 18px;
      border-radius: var(--radius-full);
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(59, 130, 246, 0.25);
      margin-bottom: 24px;
      font-size: 0.88rem;
      font-weight: 600;
      color: #1e40af;
    }

    .hero-tag-dot {
      width: 8px;
      height: 8px;
      background: #10b981;
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }

    .hero-title {
      font-size: 2.7rem;
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: -0.02em;
      margin-bottom: 22px;
      color: #0f172a;
    }

    .hero-highlight {
      background: linear-gradient(135deg, #1d4ed8 0%, #7c3aed 50%, #db2777 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: #475569;
      line-height: 1.7;
      max-width: 780px;
      margin: 0 auto 36px auto;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }

    .hero-actions .btn {
      min-width: 170px;
      padding: 13px 26px;
      font-size: 1rem;
    }

    .hero-metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 20px;
    }

    .metric-chip {
      background: #ffffff;
      padding: 20px 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--c-border);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
    }

    .metric-chip:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: rgba(59, 130, 246, 0.4);
    }

    .metric-number {
      display: block;
      font-size: 1.85rem;
      font-weight: 800;
      color: #1e3a8a;
      line-height: 1.2;
      margin-bottom: 6px;
    }

    .metric-label {
      font-size: 0.88rem;
      color: #64748b;
      font-weight: 500;
    }

    /* 多模型生态徽章云 */
    .model-pills {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 32px;
      padding: 16px 20px;
      background: rgba(255, 255, 255, 0.8);
      border-radius: var(--radius-lg);
      border: 1px solid var(--c-border);
    }

    .pill-item {
      padding: 6px 14px;
      font-size: 0.82rem;
      font-weight: 600;
      color: #334155;
      background: #f1f5f9;
      border-radius: var(--radius-full);
      border: 1px solid #e2e8f0;
      transition: var(--transition);
    }

    .pill-item:hover {
      background: #eff6ff;
      border-color: #93c5fd;
      color: #1d4ed8;
      transform: translateY(-1px);
    }

    /* 平台核心介绍卡片 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 30px 26px;
      border: 1px solid var(--c-border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(59, 130, 246, 0.35);
    }

    .card-icon {
      width: 52px;
      height: 52px;
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 20px;
      font-weight: bold;
    }

    .card-icon-blue { background: #eff6ff; color: #2563eb; }
    .card-icon-purple { background: #f5f3ff; color: #7c3aed; }
    .card-icon-cyan { background: #ecfeff; color: #0891b2; }
    .card-icon-rose { background: #fff1f2; color: #e11d48; }
    .card-icon-amber { background: #fffbeb; color: #d97706; }
    .card-icon-emerald { background: #ecfdf5; color: #059669; }

    .card-title {
      font-size: 1.22rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: #0f172a;
    }

    .card-desc {
      font-size: 0.94rem;
      color: #475569;
      line-height: 1.65;
      flex-grow: 1;
    }

    /* 场景矩阵（斑斓彩调） */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .scenario-box {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 22px 18px;
      border: 1px solid var(--c-border);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .scenario-box::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: var(--line-accent, #3b82f6);
    }

    .scenario-box:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }

    .sc-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #1e293b;
      margin-bottom: 8px;
    }

    .sc-desc {
      font-size: 0.88rem;
      color: #64748b;
      line-height: 1.55;
    }

    /* 工作流步骤 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 22px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      padding: 26px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--c-border);
      position: relative;
    }

    .step-badge {
      width: 38px;
      height: 38px;
      background: #1e40af;
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
      margin-bottom: 16px;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: #0f172a;
    }

    .step-text {
      font-size: 0.9rem;
      color: #475569;
      line-height: 1.55;
    }

    /* 对比评测卡片与表格 */
    .review-score-hero {
      background: linear-gradient(135deg, #1e3a8a 0%, #312e81 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 36px 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      box-shadow: var(--shadow-lg);
    }

    .score-left h3 {
      font-size: 1.6rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .score-left p {
      color: #cbd5e1;
      font-size: 0.98rem;
    }

    .score-badge-right {
      display: flex;
      align-items: center;
      gap: 20px;
      text-align: right;
    }

    .score-star {
      color: #fbbf24;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }

    .score-big {
      font-size: 3.4rem;
      font-weight: 900;
      line-height: 1;
      color: #ffffff;
    }

    .score-max {
      font-size: 1rem;
      color: #94a3b8;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--c-border);
      box-shadow: var(--shadow-sm);
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

    .custom-table th,
    .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--c-border);
    }

    .custom-table th {
      background: #f8fafc;
      color: #1e293b;
      font-weight: 700;
    }

    .custom-table tr:last-child td {
      border-bottom: none;
    }

    .table-hl-col {
      background: #eff6ff;
      color: #1d4ed8;
      font-weight: 600;
    }

    /* 素材展示画廊 */
    .media-gallery {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      align-items: center;
    }

    .gallery-col {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

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

    .media-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-lg);
    }

    .media-img-holder {
      width: 100%;
      background: #e2e8f0;
    }

    .media-img-holder img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .media-info {
      padding: 16px 20px;
    }

    .media-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 4px;
    }

    .media-sub {
      font-size: 0.88rem;
      color: #64748b;
    }

    /* 用户评论卡片 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .testimonial-card {
      background: #ffffff;
      padding: 26px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--c-border);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testi-content {
      font-size: 0.94rem;
      color: #334155;
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: normal;
    }

    .testi-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--c-border-light);
      padding-top: 16px;
    }

    .user-avatar-char {
      width: 44px;
      height: 44px;
      background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .user-meta-name {
      font-size: 0.98rem;
      font-weight: 700;
      color: #0f172a;
    }

    .user-meta-role {
      font-size: 0.82rem;
      color: #64748b;
    }

    /* FAQ 手风琴面板 */
    .faq-accordion {
      max-width: 880px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-trigger {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: transparent;
      border: none;
      font-size: 1.05rem;
      font-weight: 600;
      color: #0f172a;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-trigger:hover {
      color: var(--c-primary);
    }

    .faq-icon {
      font-size: 1.2rem;
      font-weight: 400;
      color: #64748b;
      transition: transform 0.25s ease;
    }

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

    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      background: #f8fafc;
    }

    .faq-body-inner {
      padding: 0 24px 20px 24px;
      font-size: 0.94rem;
      color: #475569;
      line-height: 1.65;
    }

    /* 需求匹配与表单 */
    .form-section-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }

    .form-intro-card {
      background: linear-gradient(135deg, #f0fdf4 0%, #e0f2fe 100%);
      border: 1px solid #bae6fd;
      border-radius: var(--radius-lg);
      padding: 36px;
    }

    .form-intro-card h3 {
      font-size: 1.5rem;
      font-weight: 800;
      color: #0c4a6e;
      margin-bottom: 14px;
    }

    .form-intro-card p {
      color: #0369a1;
      font-size: 0.96rem;
      margin-bottom: 24px;
    }

    .form-benefit-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .form-benefit-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.92rem;
      font-weight: 600;
      color: #075985;
    }

    .contact-form-card {
      background: #ffffff;
      padding: 36px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--c-border);
      box-shadow: var(--shadow-lg);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: #1e293b;
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.95rem;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      background: #f8fafc;
      color: #0f172a;
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-control:focus {
      background: #ffffff;
      border-color: var(--c-primary);
      box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* 行业文章与动态 */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      margin-bottom: 30px;
    }

    .article-anchor-card {
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-md);
      padding: 16px;
      text-align: center;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      transition: var(--transition);
    }

    .article-anchor-card:hover {
      border-color: var(--c-primary);
      box-shadow: var(--shadow-sm);
      transform: translateY(-2px);
    }

    .article-icon {
      font-size: 1.3rem;
      margin-bottom: 8px;
      color: #3b82f6;
    }

    .article-anchor-title {
      font-size: 0.88rem;
      font-weight: 600;
      color: #1e293b;
    }

    /* 友情链接与生态合作 */
    .partner-links-bar {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 12px;
      padding: 20px;
      background: #f1f5f9;
      border-radius: var(--radius-md);
    }

    .partner-label {
      font-size: 0.9rem;
      font-weight: 700;
      color: #475569;
      margin-right: 8px;
    }

    .partner-links-bar a {
      font-size: 0.9rem;
      color: #475569;
      padding: 4px 10px;
      background: #ffffff;
      border: 1px solid var(--c-border);
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }

    .partner-links-bar a:hover {
      color: var(--c-primary);
      border-color: var(--c-primary);
    }

    /* 页脚设计 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      border-top: 1px solid #1e293b;
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col-brand h4 {
      color: #ffffff;
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .footer-col-brand p {
      font-size: 0.9rem;
      line-height: 1.6;
      color: #94a3b8;
      max-width: 320px;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .footer-menu {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-menu li a {
      color: #94a3b8;
      font-size: 0.88rem;
      transition: var(--transition);
    }

    .footer-menu li a:hover {
      color: #ffffff;
    }

    .footer-qr-block {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .footer-qr-img {
      width: 90px;
      height: 90px;
      background: #ffffff;
      padding: 4px;
      border-radius: var(--radius-sm);
    }

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

    .footer-qr-txt {
      font-size: 0.84rem;
      line-height: 1.5;
    }

    .footer-bottom-bar {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.84rem;
      color: #64748b;
    }

    .footer-bottom-links {
      display: flex;
      gap: 16px;
    }

    .footer-bottom-links a {
      color: #64748b;
    }

    .footer-bottom-links a:hover {
      color: #94a3b8;
    }

    /* 浮动工具栏 */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 40px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 999;
    }

    .widget-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--c-border);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: #1e293b;
      font-size: 1.1rem;
      transition: var(--transition);
      text-decoration: none;
    }

    .widget-btn:hover {
      background: var(--c-primary);
      color: #ffffff;
      transform: translateY(-2px);
    }

    .widget-btn.btn-top {
      display: none;
    }

    /* 响应式媒体查询 */
    @media (max-width: 1024px) {
      .hero-title { font-size: 2.2rem; }
      .features-grid { grid-template-columns: repeat(2, 1fr); }
      .scenario-grid { grid-template-columns: repeat(2, 1fr); }
      .flow-steps { grid-template-columns: repeat(2, 1fr); }
      .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
      .article-links-grid { grid-template-columns: repeat(3, 1fr); }
      .footer-top-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .menu-toggle { display: flex; }
      .nav-desktop {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--c-border);
        padding: 20px;
        box-shadow: var(--shadow-lg);
        flex-direction: column;
        align-items: stretch;
        gap: 16px;
      }
      .nav-desktop.active { display: flex; }
      .nav-links {
        flex-direction: column;
        align-items: stretch;
      }
      .nav-links li a {
        padding: 10px 14px;
        border-radius: var(--radius-sm);
      }
      .nav-actions {
        flex-direction: column;
      }
      .nav-actions .btn {
        width: 100%;
      }
      .hero-title { font-size: 1.85rem; }
      .hero-subtitle { font-size: 1rem; }
      .hero-metrics-bar { grid-template-columns: repeat(2, 1fr); }
      .features-grid { grid-template-columns: 1fr; }
      .scenario-grid { grid-template-columns: 1fr; }
      .flow-steps { grid-template-columns: 1fr; }
      .testimonials-grid { grid-template-columns: 1fr; }
      .media-gallery { grid-template-columns: 1fr; }
      .form-section-layout { grid-template-columns: 1fr; }
      .article-links-grid { grid-template-columns: 1fr; }
      .footer-top-grid { grid-template-columns: 1fr; }
      .footer-bottom-bar { flex-direction: column; gap: 12px; text-align: center; }
      .review-score-hero { flex-direction: column; text-align: center; gap: 20px; }
      .score-badge-right { text-align: center; justify-content: center; }
    }