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

    :root {
      --primary: #4f2fe0;
      --primary-soft: #ede9ff;
      --secondary: #00d4ff;
      --accent: #ff3b9e;
      --dark: #13132e;
      --body-bg: #fbfaff;
      --card-bg: #ffffff;
      --text-main: #1f1f3a;
      --text-muted: #5a5a7a;
      --border-light: #e6e3ff;
      --shadow-sm: 0 8px 24px rgba(79, 47, 224, .06);
      --shadow-md: 0 16px 40px rgba(79, 47, 224, .12);
      --radius-lg: 28px;
      --radius-md: 18px;
      --max-width: 1240px;
      --font: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
    }

    body {
      font-family: var(--font);
      background: var(--body-bg);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ========== 导航 ========== */
    .site-header {
      background: rgba(255, 255, 255, .82);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(79, 47, 224, .08);
      position: sticky;
      top: 0;
      z-index: 100;
    }

    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 72px;
      gap: 24px;
    }

    .logo-box {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

    .ai-page-logo {
      width: 120px;
      object-fit: contain;
    }

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

    .nav-links a {
      display: inline-block;
      padding: 8px 14px;
      font-size: .92rem;
      font-weight: 500;
      color: var(--text-main);
      border-radius: 100px;
      transition: background .2s, color .2s;
      white-space: nowrap;
    }

    .nav-links a:hover {
      background: var(--primary-soft);
      color: var(--primary);
    }

    .nav-cta {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: linear-gradient(135deg, var(--primary), #7b5cff);
      color: #fff !important;
      padding: 10px 22px !important;
      border-radius: 100px !important;
      font-weight: 600;
      box-shadow: 0 6px 20px rgba(79, 47, 224, .3);
      transition: transform .2s, box-shadow .2s;
    }

    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 28px rgba(79, 47, 224, .42);
      background: linear-gradient(135deg, #3f1fcc, #6a4aff) !important;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
      flex-direction: column;
      gap: 5px;
    }

    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2.5px;
      background: var(--dark);
      border-radius: 4px;
      transition: .25s;
    }

    /* ========== Hero ========== */
    .hero {
      position: relative;
      padding: 88px 0 100px;
      background: linear-gradient(160deg, #f5f1ff 0%, #ffffff 40%, #f0fdff 100%);
      overflow: hidden;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background:
        radial-gradient(circle at 12% 18%, rgba(79, 47, 224, .10) 0, transparent 38%),
        radial-gradient(circle at 88% 30%, rgba(0, 212, 255, .10) 0, transparent 42%),
        radial-gradient(circle at 50% 90%, rgba(255, 59, 158, .06) 0, transparent 45%);
      pointer-events: none;
    }

    .hero-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 60px;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #fff;
      border: 1px solid var(--border-light);
      padding: 6px 16px;
      border-radius: 100px;
      font-size: .82rem;
      font-weight: 600;
      color: var(--primary);
      box-shadow: var(--shadow-sm);
      margin-bottom: 22px;
      animation: badgePulse 3s ease-in-out infinite;
    }

    @keyframes badgePulse {
      0%, 100% { box-shadow: 0 4px 14px rgba(79,47,224,.12); }
      50% { box-shadow: 0 4px 24px rgba(79,47,224,.24); }
    }

    .hero-badge .dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
    }

    .hero h1 {
      font-size: clamp(2rem, 4.2vw, 3.3rem);
      font-weight: 800;
      line-height: 1.16;
      letter-spacing: -.02em;
      color: var(--dark);
      margin-bottom: 18px;
    }

    .hero h1 .grad {
      background: linear-gradient(120deg, #4f2fe0, #00b8d9 60%, #ff3b9e);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .hero-sub {
      font-size: 1.04rem;
      color: var(--text-muted);
      max-width: 560px;
      margin-bottom: 28px;
      line-height: 1.75;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 34px;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: linear-gradient(135deg, var(--primary), #7b5cff);
      color: #fff;
      font-weight: 700;
      font-size: 1rem;
      padding: 14px 32px;
      border-radius: 100px;
      border: none;
      cursor: pointer;
      box-shadow: 0 10px 28px rgba(79, 47, 224, .32);
      transition: transform .2s, box-shadow .2s;
    }

    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 16px 40px rgba(79, 47, 224, .44);
    }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: #fff;
      color: var(--primary);
      font-weight: 600;
      font-size: 1rem;
      padding: 13px 30px;
      border-radius: 100px;
      border: 1.5px solid var(--primary);
      cursor: pointer;
      transition: background .2s, transform .2s, box-shadow .2s;
    }

    .btn-secondary:hover {
      background: var(--primary-soft);
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(79, 47, 224, .12);
    }

    .hero-stats {
      display: flex;
      gap: 36px;
      flex-wrap: wrap;
    }

    .stat-item .num {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--dark);
      line-height: 1.2;
    }

    .stat-item .num em {
      font-style: normal;
      color: var(--primary);
    }

    .stat-item .label {
      font-size: .82rem;
      color: var(--text-muted);
      margin-top: 2px;
    }

    /* Hero 右侧装饰卡片 */
    .hero-visual {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .glow-card {
      background: rgba(255, 255, 255, .88);
      border: 1px solid rgba(79, 47, 224, .10);
      border-radius: 24px;
      padding: 26px 28px;
      box-shadow: 0 20px 48px rgba(79, 47, 224, .08);
      backdrop-filter: blur(8px);
      position: relative;
      overflow: hidden;
      transition: transform .3s, box-shadow .3s;
    }

    .glow-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 28px 60px rgba(79, 47, 224, .16);
    }

    .glow-card::after {
      content: '';
      position: absolute;
      top: -40%;
      right: -20%;
      width: 180px;
      height: 180px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(0, 212, 255, .18), transparent 70%);
      pointer-events: none;
    }

    .glow-card .card-label {
      font-size: .78rem;
      font-weight: 700;
      letter-spacing: .08em;
      text-transform: uppercase;
      color: var(--primary);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .glow-card .card-label::before {
      content: '';
      width: 18px;
      height: 3px;
      border-radius: 3px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
    }

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

    .model-tags span {
      background: var(--primary-soft);
      color: var(--primary);
      font-size: .76rem;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 100px;
      border: 1px solid rgba(79, 47, 224, .06);
    }

    .glow-card .mini-chart {
      display: flex;
      align-items: flex-end;
      gap: 10px;
      height: 56px;
      margin-top: 10px;
    }

    .glow-card .bar {
      flex: 1;
      border-radius: 6px 6px 0 0;
      background: linear-gradient(180deg, var(--secondary), var(--primary));
      opacity: .8;
      animation: barGrow .9s cubic-bezier(.2, .8, .4, 1) forwards;
      transform-origin: bottom;
      transform: scaleY(0);
    }

    .glow-card .bar:nth-child(1) { height: 38%; animation-delay: .05s; }
    .glow-card .bar:nth-child(2) { height: 58%; animation-delay: .12s; }
    .glow-card .bar:nth-child(3) { height: 46%; animation-delay: .19s; }
    .glow-card .bar:nth-child(4) { height: 74%; animation-delay: .26s; }
    .glow-card .bar:nth-child(5) { height: 92%; animation-delay: .33s; }

    @keyframes barGrow {
      to { transform: scaleY(1); }
    }

    .glow-card .hint {
      font-size: .82rem;
      color: var(--text-muted);
      margin-top: 8px;
    }

    /* ========== 通用 Section ========== */
    .section {
      padding: 80px 0;
      position: relative;
    }

    .section-alt {
      background: linear-gradient(180deg, #f5f2ff 0%, #ffffff 100%);
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }

    .section-eyebrow {
      display: inline-block;
      font-size: .78rem;
      font-weight: 700;
      letter-spacing: .12em;
      text-transform: uppercase;
      color: var(--primary);
      background: var(--primary-soft);
      padding: 4px 16px;
      border-radius: 100px;
      margin-bottom: 14px;
    }

    .section-header h2 {
      font-size: clamp(1.6rem, 3vw, 2.4rem);
      font-weight: 800;
      color: var(--dark);
      letter-spacing: -.01em;
      line-height: 1.28;
      margin-bottom: 12px;
    }

    .section-header p {
      color: var(--text-muted);
      font-size: .98rem;
      line-height: 1.7;
    }

    /* ========== 数据指标 ========== */
    .metric-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .metric-card {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: transform .25s, box-shadow .25s;
    }

    .metric-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }

    .metric-card .metric-num {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
      margin-bottom: 4px;
    }

    .metric-card .metric-label {
      font-size: .85rem;
      color: var(--text-muted);
    }

    /* ========== 服务卡片 ========== */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      transition: transform .25s, box-shadow .25s, border-color .25s;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: rgba(79, 47, 224, .18);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 14px;
      background: linear-gradient(135deg, var(--primary-soft), #e2f9ff);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .service-card h3 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--dark);
    }

    .service-card p {
      font-size: .9rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* ========== 流程 ========== */
    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      counter-reset: step;
    }

    .process-item {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      position: relative;
      box-shadow: var(--shadow-sm);
      transition: transform .25s;
    }

    .process-item:hover {
      transform: translateY(-4px);
    }

    .process-item::before {
      counter-increment: step;
      content: "0" counter(step);
      position: absolute;
      top: 18px;
      right: 20px;
      font-size: 2.4rem;
      font-weight: 800;
      color: var(--primary-soft);
      line-height: 1;
    }

    .process-item h3 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
      position: relative;
      z-index: 1;
    }

    .process-item p {
      font-size: .86rem;
      color: var(--text-muted);
      line-height: 1.6;
      position: relative;
      z-index: 1;
    }

    /* ========== 对比评测 ========== */
    .compare-wrap {
      display: grid;
      grid-template-columns: 1fr 1.5fr;
      gap: 40px;
      align-items: start;
    }

    .rating-card {
      background: linear-gradient(160deg, #1a1440, #2d1d7c);
      border-radius: var(--radius-lg);
      padding: 40px 32px;
      color: #fff;
      box-shadow: 0 24px 60px rgba(26, 20, 64, .35);
      position: relative;
      overflow: hidden;
    }

    .rating-card::after {
      content: '';
      position: absolute;
      bottom: -60px;
      right: -60px;
      width: 200px;
      height: 200px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(0, 212, 255, .22), transparent 70%);
      pointer-events: none;
    }

    .rating-card .stars {
      font-size: 1.5rem;
      letter-spacing: 4px;
      color: #ffd93b;
      margin-bottom: 8px;
    }

    .rating-card .score {
      font-size: 3.4rem;
      font-weight: 800;
      line-height: 1;
      margin-bottom: 6px;
    }

    .rating-card .score span {
      font-size: 1.1rem;
      font-weight: 500;
      color: rgba(255, 255, 255, .6);
    }

    .rating-card .rating-label {
      font-size: .9rem;
      color: rgba(255, 255, 255, .7);
      margin-bottom: 24px;
    }

    .rating-card .rating-desc {
      font-size: .9rem;
      line-height: 1.7;
      color: rgba(255, 255, 255, .82);
      border-top: 1px solid rgba(255, 255, 255, .12);
      padding-top: 20px;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      font-size: .9rem;
      background: var(--card-bg);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .compare-table th,
    .compare-table td {
      padding: 14px 18px;
      text-align: left;
      border-bottom: 1px solid var(--border-light);
    }

    .compare-table th {
      background: var(--primary-soft);
      font-weight: 700;
      color: var(--dark);
      font-size: .85rem;
    }

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

    .compare-table td:first-child {
      font-weight: 600;
      color: var(--dark);
      background: #fcfbff;
    }

    .check-mark {
      color: #21b57a;
      font-weight: 700;
    }

    .partial-mark {
      color: #f0a83b;
      font-weight: 600;
    }

    /* ========== FAQ ========== */
    .faq-list {
      max-width: 880px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: box-shadow .2s;
    }

    .faq-item.open {
      box-shadow: var(--shadow-md);
    }

    .faq-question {
      width: 100%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      padding: 18px 22px;
      background: none;
      border: none;
      cursor: pointer;
      font-family: var(--font);
      font-size: .96rem;
      font-weight: 600;
      color: var(--dark);
      text-align: left;
      transition: background .2s;
    }

    .faq-question:hover {
      background: #faf8ff;
    }

    .faq-question .chevron {
      flex-shrink: 0;
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: var(--primary-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: 700;
      font-size: .8rem;
      transition: transform .25s;
    }

    .faq-item.open .chevron {
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height .35s ease, padding .25s;
      padding: 0 22px;
      font-size: .9rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .faq-item.open .faq-answer {
      max-height: 300px;
      padding: 0 22px 20px;
    }

    /* ========== 评论 ========== */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .review-card {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 26px 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      gap: 14px;
      transition: transform .25s, box-shadow .25s;
    }

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

    .review-stars {
      color: #ffb400;
      font-size: .9rem;
      letter-spacing: 2px;
    }

    .review-text {
      font-size: .9rem;
      color: var(--text-main);
      line-height: 1.7;
      flex: 1;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 14px;
      border-top: 1px solid var(--border-light);
    }

    .review-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: .9rem;
      flex-shrink: 0;
    }

    .review-author .info .name {
      font-size: .88rem;
      font-weight: 700;
      color: var(--dark);
    }

    .review-author .info .role {
      font-size: .76rem;
      color: var(--text-muted);
    }

    /* ========== 案例展示（图片） ========== */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .showcase-card {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform .25s, box-shadow .25s;
    }

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

    .showcase-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 10;
      background: #f3f0ff;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .showcase-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      padding: 6px;
    }

    .showcase-body {
      padding: 20px 22px;
    }

    .showcase-body h3 {
      font-size: .98rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 6px;
    }

    .showcase-body p {
      font-size: .84rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* ========== 文章列表 ========== */
    .article-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .article-card {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 26px 24px;
      box-shadow: var(--shadow-sm);
      transition: transform .25s, box-shadow .25s;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

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

    .article-tag {
      font-size: .72rem;
      font-weight: 700;
      color: var(--primary);
      background: var(--primary-soft);
      padding: 3px 10px;
      border-radius: 100px;
      align-self: flex-start;
    }

    .article-card h3 {
      font-size: .95rem;
      font-weight: 700;
      color: var(--dark);
      line-height: 1.5;
    }

    .article-card p {
      font-size: .84rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex: 1;
    }

    .article-card .read-more {
      font-size: .84rem;
      font-weight: 600;
      color: var(--primary);
    }

    /* ========== 表单 ========== */
    .form-contact-wrap {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 48px;
      align-items: start;
    }

    .contact-info h2 {
      font-size: 2rem;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 14px;
    }

    .contact-info > p {
      color: var(--text-muted);
      font-size: .96rem;
      line-height: 1.7;
      margin-bottom: 28px;
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      margin-bottom: 20px;
    }

    .contact-item .icon {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: var(--primary-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      color: var(--primary);
      flex-shrink: 0;
    }

    .contact-item .detail .label {
      font-size: .78rem;
      color: var(--text-muted);
      margin-bottom: 2px;
    }

    .contact-item .detail .value {
      font-size: .94rem;
      font-weight: 600;
      color: var(--dark);
    }

    .qr-block {
      margin-top: 24px;
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    .qr-block img {
      width: 100px;
      border-radius: 12px;
      border: 1px solid var(--border-light);
    }

    .qr-block .qr-hint {
      font-size: .84rem;
      color: var(--text-muted);
    }

    .form-card {
      background: var(--card-bg);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 38px 32px;
      box-shadow: var(--shadow-md);
    }

    .form-card h3 {
      font-size: 1.30rem;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 6px;
    }

    .form-card .form-sub {
      font-size: .86rem;
      color: var(--text-muted);
      margin-bottom: 24px;
    }

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
      margin-bottom: 16px;
    }

    .form-group label {
      font-size: .82rem;
      font-weight: 600;
      color: var(--dark);
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #dedaf5;
      border-radius: 12px;
      font-family: var(--font);
      font-size: .9rem;
      color: var(--text-main);
      background: #fbfaff;
      outline: none;
      transition: border-color .2s, box-shadow .2s;
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(79, 47, 224, .12);
    }

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

    .form-card .btn-primary {
      width: 100%;
      margin-top: 8px;
      padding: 14px;
      font-size: 1rem;
    }

    /* ========== 友情链接 ========== */
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px 24px;
      justify-content: center;
    }

    .friend-links a {
      font-size: .86rem;
      color: var(--text-muted);
      transition: color .2s;
      padding: 4px 0;
    }

    .friend-links a:hover {
      color: var(--primary);
    }

    /* ========== footer ========== */
    .site-footer {
      background: #13132e;
      color: #d8d6f0;
      padding: 56px 0 28px;
      font-size: .88rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 36px;
      border-bottom: 1px solid rgba(255, 255, 255, .08);
    }

    .footer-brand .footer-logo-text {
      font-size: 1.2rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 10px;
    }

    .footer-brand p {
      color: #a5a2c5;
      line-height: 1.7;
      font-size: .86rem;
      max-width: 320px;
    }

    .footer-col h4 {
      font-size: .92rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }

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

    .footer-col a {
      color: #a5a2c5;
      transition: color .2s;
      font-size: .86rem;
    }

    .footer-col a:hover {
      color: #fff;
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      padding-top: 24px;
      font-size: .8rem;
      color: #8b88ab;
    }

    /* ========== 浮动客服 ========== */
    .floating-cs {
      position: fixed;
      right: 20px;
      bottom: 28px;
      z-index: 200;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
    }

    .cs-btn {
      width: 52px;
      height: 52px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), #7b5cff);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 24px rgba(79, 47, 224, .4);
      cursor: pointer;
      border: none;
      font-size: 1.2rem;
      transition: transform .2s, box-shadow .2s;
    }

    .cs-btn:hover {
      transform: translateY(-3px) scale(1.05);
      box-shadow: 0 12px 32px rgba(79, 47, 224, .55);
    }

    .cs-qr-pop {
      display: none;
      position: absolute;
      right: 64px;
      bottom: 0;
      background: #fff;
      border-radius: 16px;
      padding: 14px;
      box-shadow: 0 16px 40px rgba(0, 0, 0, .16);
      text-align: center;
    }

    .cs-qr-pop.show {
      display: block;
      animation: fadeUp .25s ease;
    }

    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(8px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .cs-qr-pop img {
      width: 130px;
      border-radius: 10px;
    }

    .cs-qr-pop p {
      font-size: .76rem;
      color: var(--text-muted);
      margin-top: 8px;
    }

    /* ========== 滚动动画 ========== */
    .reveal {
      opacity: 0;
      transform: translateY(26px);
      transition: opacity .6s ease, transform .6s ease;
    }

    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* ========== 响应式 ========== */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; gap: 40px; }
      .hero-visual { max-width: 520px; }
      .metric-grid { grid-template-columns: repeat(2, 1fr); }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .process-grid { grid-template-columns: repeat(2, 1fr); }
      .compare-wrap { grid-template-columns: 1fr; }
      .review-grid { grid-template-columns: repeat(2, 1fr); }
      .showcase-grid { grid-template-columns: repeat(2, 1fr); }
      .article-grid { grid-template-columns: repeat(2, 1fr); }
      .form-contact-wrap { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 16px 24px 24px;
        gap: 4px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: 0 20px 40px rgba(0, 0, 0, .08);
        z-index: 99;
      }

      .nav-links.open {
        display: flex;
      }

      .nav-links a {
        padding: 12px 16px;
        border-radius: 10px;
      }

      .nav-cta {
        justify-content: center;
        margin-top: 8px;
      }

      .menu-toggle {
        display: flex;
      }

      .hero { padding: 56px 0 64px; }
      .hero-stats { gap: 24px; }
      .section { padding: 56px 0; }
      .metric-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
      .metric-card { padding: 22px 16px; }
      .metric-card .metric-num { font-size: 1.4rem; }
      .service-grid { grid-template-columns: 1fr; }
      .process-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
      .review-grid { grid-template-columns: 1fr; }
      .showcase-grid { grid-template-columns: 1fr; }
      .article-grid { grid-template-columns: 1fr; }
      .form-row { grid-template-columns: 1fr; }
      .form-card { padding: 28px 22px; }
      .footer-grid { grid-template-columns: 1fr; gap: 28px; }
      .footer-brand p { max-width: none; }
      .compare-table { font-size: .8rem; }
      .compare-table th,
      .compare-table td { padding: 10px 12px; }
      .footer-bottom { flex-direction: column; text-align: center; }
      .cs-qr-pop { right: 56px; }
      .cs-qr-pop img { width: 110px; }
    }

    @media (max-width: 480px) {
      .container { padding: 0 16px; }
      .hero h1 { font-size: 1.7rem; }
      .hero-actions { flex-direction: column; }
      .hero-actions .btn-primary,
      .hero-actions .btn-secondary { width: 100%; }
      .process-grid { grid-template-columns: 1fr; }
      .rating-card .score { font-size: 2.6rem; }
    }