* { margin:0; padding:0; box-sizing:border-box; }
    html { scroll-behavior:smooth; }
    body {
      font-family: "PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
      color: #1e2430;
      background: #f6f8ff;
      background-image: radial-gradient(circle at 8% 12%, rgba(88,102,242,0.10) 0%, transparent 32%),
        radial-gradient(circle at 92% 4%, rgba(255,127,80,0.10) 0%, transparent 30%),
        radial-gradient(circle at 84% 80%, rgba(46,204,180,0.10) 0%, transparent 38%);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .container {
      width: 100%;
      max-width: 1180px;
      margin: 0 auto;
      padding: 0 24px;
    }
    a { text-decoration: none; color: inherit; }
    ul { list-style: none; }
    img { max-width: 100%; height: auto; display: block; }
    h1, h2, h3, h4 { line-height: 1.3; font-weight: 700; color: #151b2b; }
    h2 { font-size: clamp(1.55rem, 3.5vw, 2.2rem); margin-bottom: 14px; letter-spacing: -0.02em; }
    h3 { font-size: 1.16rem; margin-bottom: 10px; }
    p { color: #3e4657; }
    .section { padding: 64px 0; position: relative; }
    .section-head { max-width: 720px; margin-bottom: 36px; }
    .section-head p { font-size: 0.98rem; color: #59617a; }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: #4b56e0;
      background: rgba(75,86,224,0.09);
      padding: 6px 16px;
      border-radius: 999px;
      margin-bottom: 18px;
    }
    .eyebrow::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: linear-gradient(135deg, #5866f2, #ff7f50);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 30px;
      border-radius: 60px;
      font-size: 0.96rem;
      font-weight: 700;
      cursor: pointer;
      border: none;
      transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
      text-align: center;
      line-height: 1.3;
    }
    .btn-primary {
      background: linear-gradient(135deg, #5866f2 0%, #7b5cf0 55%, #ff7f50 130%);
      color: #fff;
      box-shadow: 0 12px 28px -8px rgba(88,102,242,0.6);
    }
    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 18px 34px -8px rgba(88,102,242,0.7);
    }
    .btn-outline {
      background: #fff;
      color: #2c3450;
      border: 1.5px solid #d4d9ef;
      box-shadow: 0 3px 10px rgba(24,32,60,0.05);
    }
    .btn-outline:hover {
      border-color: #5866f2;
      color: #4b56e0;
      transform: translateY(-3px);
      box-shadow: 0 12px 22px -8px rgba(88,102,242,0.28);
    }
    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255,255,255,0.86);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(200,208,236,0.5);
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      min-height: 72px;
      flex-wrap: nowrap;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .brand img {
      width: 40px;
      height: 40px;
      border-radius: 10px;
      object-fit: contain;
      background: #fff;
    }
    .brand strong {
      font-size: 1.14rem;
      letter-spacing: 0.02em;
      background: linear-gradient(118deg, #4b56e0, #9a4fd6 60%, #ff7f50);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      white-space: nowrap;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
      justify-content: flex-end;
    }
    .nav-links a {
      padding: 8px 13px;
      font-size: 0.9rem;
      font-weight: 600;
      color: #39415a;
      border-radius: 40px;
      transition: color 0.2s, background 0.2s;
      white-space: nowrap;
    }
    .nav-links a:hover {
      color: #4b56e0;
      background: rgba(88,102,242,0.08);
    }
    .nav-cta {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: linear-gradient(135deg, #5866f2, #8f5cf0);
      color: #fff;
      padding: 9px 20px;
      border-radius: 50px;
      font-size: 0.88rem;
      font-weight: 700;
      margin-left: 10px;
      transition: transform 0.2s, box-shadow 0.2s;
      white-space: nowrap;
    }
    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 20px -6px rgba(88,102,242,0.6);
    }
    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 6px;
    }
    .menu-toggle span {
      width: 24px;
      height: 2.4px;
      border-radius: 4px;
      background: #2b3450;
      transition: 0.25s ease;
    }
    .menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .menu-toggle.active span:nth-child(2) { opacity: 0; }
    .menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    /* Hero */
    .hero {
      padding: 72px 0 80px;
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        radial-gradient(ellipse 60% 70% at 90% 10%, rgba(255,140,90,0.12), transparent 55%),
        radial-gradient(ellipse 50% 60% at 5% 80%, rgba(88,102,242,0.14), transparent 55%);
      pointer-events: none;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 44px;
      align-items: center;
      position: relative;
      z-index: 2;
    }
    .hero h1 {
      font-size: clamp(2.1rem, 4.6vw, 3.4rem);
      letter-spacing: -0.03em;
      margin-bottom: 20px;
      background: linear-gradient(118deg, #1e2745 20%, #4b56e0 60%, #e05b3b 100%);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }
    .hero p.lead {
      font-size: 1.06rem;
      color: #4a526a;
      margin-bottom: 30px;
      max-width: 620px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 36px;
    }
    .hero-stats {
      display: flex;
      flex-wrap: wrap;
      gap: 28px 42px;
    }
    .hero-stat-item strong {
      display: block;
      font-size: 1.5rem;
      font-weight: 800;
      color: #1b223b;
      letter-spacing: -0.02em;
    }
    .hero-stat-item span {
      font-size: 0.86rem;
      color: #6b7289;
      font-weight: 500;
    }
    .hero-visual {
      background: linear-gradient(160deg, #ffffff, #f3f5ff 60%, #fff0ea);
      border-radius: 32px;
      padding: 30px 26px;
      border: 1px solid rgba(255,255,255,0.9);
      box-shadow: 0 24px 60px -24px rgba(50,60,120,0.24);
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .hero-visual .pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #fff;
      border-radius: 40px;
      padding: 8px 14px;
      font-size: 0.78rem;
      font-weight: 700;
      color: #4b56e0;
      box-shadow: 0 4px 10px rgba(0,0,0,0.03);
      width: fit-content;
    }
    .hero-visual .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .hero-visual .model-tags span {
      background: rgba(88,102,242,0.08);
      color: #38426b;
      font-size: 0.76rem;
      font-weight: 600;
      padding: 5px 12px;
      border-radius: 30px;
    }
    .hero-visual .visual-note {
      font-size: 0.86rem;
      color: #58617c;
      font-weight: 500;
      border-top: 1px dashed #d7dcf0;
      padding-top: 14px;
    }
    /* 数据指标 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .metric-card {
      background: #fff;
      border-radius: 24px;
      padding: 26px 22px;
      border: 1px solid rgba(220,226,248,0.8);
      box-shadow: 0 10px 30px -18px rgba(35,45,90,0.18);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .metric-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 24px 40px -20px rgba(58,70,160,0.26);
    }
    .metric-card .metric-num {
      font-size: 2rem;
      font-weight: 800;
      background: linear-gradient(120deg, #4b56e0, #d14d7c);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      margin-bottom: 6px;
      letter-spacing: -0.03em;
    }
    .metric-card p {
      font-size: 0.9rem;
      color: #636d87;
    }
    /* 卡片通用 */
    .card {
      background: #fff;
      border-radius: 24px;
      padding: 28px 24px;
      border: 1px solid rgba(220,226,248,0.8);
      box-shadow: 0 12px 28px -20px rgba(35,45,90,0.16);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: 0 24px 44px -22px rgba(55,68,160,0.26);
    }
    .cards-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
    .cards-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
    .icon-badge {
      width: 44px;
      height: 44px;
      border-radius: 14px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 16px;
      background: linear-gradient(135deg, #5866f2, #9d5cf0);
    }
    /* 流程 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      counter-reset: step;
    }
    .step-card {
      background: #fff;
      border-radius: 20px;
      padding: 26px 20px;
      border: 1px solid rgba(220,226,248,0.8);
      position: relative;
      transition: transform 0.25s ease;
    }
    .step-card:hover { transform: translateY(-4px); }
    .step-card::before {
      counter-increment: step;
      content: counter(step, decimal-leading-zero);
      font-size: 1.6rem;
      font-weight: 800;
      color: rgba(88,102,242,0.18);
      display: block;
      margin-bottom: 6px;
      letter-spacing: -0.04em;
    }
    /* 对比表格 */
    .table-wrap {
      overflow-x: auto;
      background: #fff;
      border-radius: 24px;
      border: 1px solid rgba(220,226,248,0.8);
      box-shadow: 0 18px 40px -26px rgba(35,45,90,0.18);
    }
    table {
      width: 100%;
      min-width: 640px;
      border-collapse: collapse;
      font-size: 0.94rem;
    }
    th, td {
      padding: 16px 20px;
      text-align: left;
      border-bottom: 1px solid #eef1fa;
    }
    thead th {
      background: #f5f7ff;
      color: #1e2745;
      font-weight: 700;
      font-size: 0.92rem;
      letter-spacing: 0.01em;
    }
    tbody tr:last-child td { border-bottom: none; }
    .rate-badge {
      display: inline-block;
      background: linear-gradient(135deg, #ffe9a7, #ffc857);
      color: #6b4b00;
      font-weight: 800;
      padding: 4px 14px;
      border-radius: 30px;
      font-size: 0.84rem;
      white-space: nowrap;
    }
    /* FAQ */
    .faq-list { display: flex; flex-direction: column; gap: 12px; }
    .faq-item {
      background: #fff;
      border-radius: 18px;
      border: 1px solid rgba(220,226,248,0.8);
      overflow: hidden;
      transition: box-shadow 0.2s;
    }
    .faq-item.open { box-shadow: 0 16px 36px -22px rgba(55,68,160,0.3); }
    .faq-q {
      width: 100%;
      background: none;
      border: none;
      text-align: left;
      padding: 20px 24px;
      font-size: 1rem;
      font-weight: 700;
      color: #1c2340;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      transition: background 0.2s;
    }
    .faq-q:hover { background: #fafbff; }
    .faq-q::after {
      content: "+";
      font-size: 1.4rem;
      font-weight: 400;
      color: #5866f2;
      transition: transform 0.25s;
      flex-shrink: 0;
    }
    .faq-item.open .faq-q::after { transform: rotate(45deg); }
    .faq-a {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.3s ease;
      padding: 0 24px;
      color: #4d566e;
      font-size: 0.94rem;
    }
    .faq-item.open .faq-a {
      max-height: 280px;
      padding: 0 24px 22px;
    }
    /* 评论 */
    .review-card {
      background: #fff;
      border-radius: 24px;
      padding: 26px 24px;
      border: 1px solid rgba(220,226,248,0.8);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 22px 40px -22px rgba(35,45,90,0.2);
    }
    .review-head {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 14px;
    }
    .avatar {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: linear-gradient(135deg, #dfe4ff, #ffe3d6);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: #4b56e0;
      font-size: 1.1rem;
      flex-shrink: 0;
    }
    .review-head strong { display: block; font-size: 0.96rem; }
    .review-head span { font-size: 0.8rem; color: #7a829b; }
    .review-stars { color: #f5b400; letter-spacing: 2px; font-size: 0.9rem; margin-top: 2px; }
    .review-card p { font-size: 0.92rem; color: #4d566e; margin-top: 10px; }
    /* 案例与文章 */
    .media-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .media-card {
      background: #fff;
      border-radius: 22px;
      overflow: hidden;
      border: 1px solid rgba(220,226,248,0.8);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .media-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 24px 44px -24px rgba(35,45,90,0.24);
    }
    .media-thumb {
      aspect-ratio: 4 / 3;
      background: linear-gradient(135deg, #e7eaff, #ffe9e0);
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }
    .media-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .media-body { padding: 20px 22px 22px; }
    .media-body h3 { font-size: 1.02rem; margin-bottom: 8px; }
    .media-body p { font-size: 0.88rem; color: #64708a; }
    .article-list { display: flex; flex-direction: column; gap: 12px; }
    .article-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      background: #fff;
      border-radius: 18px;
      padding: 18px 22px;
      border: 1px solid rgba(220,226,248,0.8);
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .article-item:hover {
      transform: translateX(4px);
      box-shadow: 0 12px 26px -18px rgba(35,45,90,0.2);
    }
    .article-index {
      font-size: 1.1rem;
      font-weight: 800;
      color: #b3bce6;
      flex-shrink: 0;
    }
    .article-item h4 {
      font-size: 0.98rem;
      margin-bottom: 4px;
    }
    .article-item p { font-size: 0.84rem; color: #6d7894; }
    /* 表单 */
    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
    }
    .form-item { display: flex; flex-direction: column; gap: 7px; }
    .form-item.full { grid-column: 1 / -1; }
    .form-item label {
      font-size: 0.86rem;
      font-weight: 700;
      color: #2b3450;
    }
    .form-item input,
    .form-item select,
    .form-item textarea {
      width: 100%;
      padding: 13px 16px;
      border-radius: 14px;
      border: 1.5px solid #dde2f2;
      background: #fafbff;
      font-size: 0.94rem;
      color: #1e2430;
      font-family: inherit;
      transition: border-color 0.2s, box-shadow 0.2s;
    }
    .form-item input:focus,
    .form-item select:focus,
    .form-item textarea:focus {
      outline: none;
      border-color: #5866f2;
      box-shadow: 0 0 0 4px rgba(88,102,242,0.12);
      background: #fff;
    }
    .form-item textarea { resize: vertical; min-height: 110px; }
    .form-note { font-size: 0.8rem; color: #7a839c; margin-top: 6px; }
    /* 友情链接、标签云 */
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
    .tag-cloud span, .tag-cloud a {
      display: inline-block;
      background: #fff;
      border: 1px solid #e1e6f5;
      color: #3e486c;
      font-size: 0.84rem;
      font-weight: 600;
      padding: 8px 16px;
      border-radius: 40px;
      transition: 0.2s;
    }
    .tag-cloud a:hover {
      border-color: #5866f2;
      color: #4b56e0;
      background: #f5f7ff;
    }
    .link-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 22px;
    }
    .link-grid a {
      font-size: 0.88rem;
      font-weight: 600;
      color: #4a5475;
      transition: color 0.2s;
    }
    .link-grid a:hover { color: #4b56e0; text-decoration: underline; }
    /* footer */
    .site-footer {
      background: #151c2f;
      color: #c8cfdf;
      padding: 54px 0 28px;
      margin-top: 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.1fr;
      gap: 36px;
      padding-bottom: 36px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .site-footer h4 {
      color: #ffffff;
      font-size: 0.96rem;
      margin-bottom: 16px;
      font-weight: 700;
    }
    .site-footer p,
    .site-footer a {
      color: #b6bed3;
      font-size: 0.88rem;
    }
    .site-footer a:hover { color: #ffffff; }
    .footer-links { display: flex; flex-direction: column; gap: 9px; }
    .footer-contact { display: flex; flex-direction: column; gap: 9px; }
    .footer-bottom {
      padding-top: 24px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      font-size: 0.82rem;
      color: #8b94ad;
    }
    .footer-qr {
      display: flex;
      align-items: center;
      gap: 14px;
      flex-wrap: wrap;
    }
    .footer-qr img {
      width: 88px;
      height: 88px;
      object-fit: contain;
      border-radius: 12px;
      background: #fff;
      padding: 5px;
    }
    .footer-qr span { font-size: 0.82rem; color: #aab3c9; }
    /* 浮动客服与返回顶部 */
    .float-actions {
      position: fixed;
      right: 20px;
      bottom: 28px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 200;
    }
    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
      font-size: 1.15rem;
      box-shadow: 0 12px 24px -8px rgba(30,40,80,0.3);
      transition: transform 0.2s, opacity 0.2s;
    }
    .float-btn:hover { transform: translateY(-4px) scale(1.04); }
    .float-top {
      background: #fff;
      color: #2b3450;
      border: 1px solid #e1e6f5;
      opacity: 0;
      pointer-events: none;
    }
    .float-top.show { opacity: 1; pointer-events: auto; }
    .float-service {
      background: linear-gradient(135deg, #5866f2, #ff7f50);
      color: #fff;
      text-decoration: none;
    }
    .float-service:hover { color: #fff; }
    /* 二维码弹层 */
    .qr-pop {
      position: fixed;
      right: 84px;
      bottom: 30px;
      background: #fff;
      border-radius: 18px;
      box-shadow: 0 22px 50px -18px rgba(20,30,70,0.36);
      padding: 14px;
      z-index: 201;
      opacity: 0;
      pointer-events: none;
      transform: translateY(10px);
      transition: opacity 0.22s, transform 0.22s;
      border: 1px solid #eef1fa;
    }
    .qr-pop.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
    .qr-pop img { width: 140px; height: 140px; object-fit: contain; border-radius: 8px; }
    .qr-pop p { font-size: 0.78rem; text-align: center; color: #5e6880; margin-top: 6px; }
    /* 入场与滚动显现 */
    .reveal {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.6s ease, transform 0.6s ease;
      will-change: opacity, transform;
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }
    @media (prefers-reduced-motion: reduce) {
      .reveal { opacity: 1; transform: none; transition: none; }
      * { animation: none !important; }
    }
    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; gap: 34px; }
      .hero-visual { max-width: 560px; }
      .metrics-grid { grid-template-columns: repeat(2, 1fr); }
      .cards-3 { grid-template-columns: repeat(2, 1fr); }
      .steps-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }
      .nav-links { display: none; }
      .nav-links.open {
        display: flex;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        background: #ffffff;
        border-bottom: 1px solid #e1e6f5;
        padding: 10px 20px 20px;
        gap: 4px;
        box-shadow: 0 24px 40px -20px rgba(20,30,70,0.18);
        z-index: 99;
      }
      .nav-links.open a { padding: 12px 14px; border-radius: 12px; }
      .nav-links.open .nav-cta { margin: 8px 0 0; justify-content: center; }
      .menu-toggle { display: flex; }
      .nav-wrap { position: relative; }
    }
    @media (max-width: 720px) {
      .section { padding: 48px 0; }
      .hero { padding: 52px 0 60px; }
      .metrics-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
      .cards-3, .cards-2, .media-grid { grid-template-columns: 1fr; }
      .steps-grid { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .hero-actions .btn { width: 100%; }
      .nav-cta { display: none; }
      .nav-links.open .nav-cta { display: inline-flex; }
      .article-item { padding: 16px 18px; }
      .footer-bottom { flex-direction: column; align-items: flex-start; }
    }
    @media (max-width: 420px) {
      .metrics-grid { grid-template-columns: 1fr; }
      .hero-stats { gap: 18px 28px; }
    }