.ps-section{
    --ps-blue:#2563EB;
    --ps-blue-2:#3B82F6;
    --ps-blue-deep:#1D4ED8;
    --ps-ink:#15171C;
    --ps-muted:#6B7280;
    --ps-line:#EEF0F3;
    font-family:'Montserrat','Helvetica Neue',Arial,'PingFang SC','Microsoft YaHei',sans-serif;
    color:var(--ps-ink);
    background:#fff;
    padding:72px 20px 80px;
    box-sizing:border-box;
  }
  .ps-section *{box-sizing:border-box;}
  .ps-inner{max-width:1200px;margin:0 auto;}

  /* 标题区 */
  .ps-head{text-align:center;margin-bottom:56px;}
  .ps-title{
    margin:0;font-size:44px;font-weight:800;letter-spacing:.14em;
    text-transform:uppercase;line-height:1.1;color:var(--ps-ink);
  }
  .ps-title::after{
    content:"";display:block;width:64px;height:5px;margin:20px auto 0;
    border-radius:99px;background:linear-gradient(90deg,var(--ps-blue-2),var(--ps-blue-deep));
  }
  .ps-subtitle{margin:26px auto 0;max-width:560px;font-size:20px;font-weight:700;color:var(--ps-ink);}
  .ps-subdesc{margin:14px auto 0;max-width:760px;font-size:15px;font-weight:400;line-height:1.75;color:var(--ps-muted);}

  /* 品类网格 */
  .ps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:46px 28px;margin-top:16px;}
  .ps-item{text-align:center;padding:6px 6px 10px;}
  .ps-circle{
    width:130px;height:130px;margin:0 auto;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    background:linear-gradient(160deg,var(--ps-blue-2) 0%,var(--ps-blue) 52%,var(--ps-blue-deep) 100%);
    box-shadow:0 10px 22px rgba(37,99,235,.26);color:#fff;
    transition:transform .28s ease, box-shadow .28s ease;position:relative;
  }
  .ps-circle::after{
    content:"";position:absolute;inset:8px;border-radius:50%;
    border:1.5px solid rgba(255,255,255,.45);pointer-events:none;
  }
  .ps-item:hover .ps-circle{transform:translateY(-6px) scale(1.05);box-shadow:0 20px 34px rgba(37,99,235,.4);}
  .ps-circle svg{width:60px;height:60px;display:block;}
  .ps-item-title{
    margin:22px 0 0;font-size:16px;font-weight:700;line-height:1.4;
    color:var(--ps-ink);min-height:2.8em;
  }
  .ps-item-desc{
    margin:10px 0 0;font-size:13px;font-weight:400;line-height:1.65;
    color:var(--ps-muted);max-width:250px;margin-left:auto;margin-right:auto;
  }

  /* 底部 CTA */
  .ps-cta{
    margin-top:76px;padding:46px 36px;border-radius:20px;
    background:linear-gradient(135deg,#EFF5FF 0%,#E1EBFF 100%);
    border:1px solid #CBDDFB;text-align:center;
  }
  .ps-cta-title{margin:0;font-size:26px;font-weight:800;line-height:1.3;color:var(--ps-ink);}
  .ps-cta-desc{margin:14px auto 0;max-width:600px;font-size:15px;line-height:1.7;color:#1E40AF;}
  .ps-btn{
    display:inline-flex;align-items:center;gap:10px;margin-top:28px;padding:16px 34px;
    border-radius:99px;background:linear-gradient(135deg,var(--ps-blue-2),var(--ps-blue-deep));
    color:#fff;font-size:15px;font-weight:800;letter-spacing:.03em;text-decoration:none;
    box-shadow:0 12px 24px rgba(37,99,235,.32);transition:transform .22s ease, box-shadow .22s ease;
  }
  .ps-btn span{transition:transform .22s ease;font-size:18px;line-height:1;}
  .ps-btn:hover{transform:translateY(-3px);box-shadow:0 18px 30px rgba(37,99,235,.42);}
  .ps-btn:hover span{transform:translateX(5px);}

  /* 响应式 */
  @media (max-width:1024px){
    .ps-grid{grid-template-columns:repeat(3,1fr);gap:40px 22px;}
    .ps-title{font-size:38px;}
  }
  @media (max-width:720px){
    .ps-section{padding:52px 18px 60px;}
    .ps-title{font-size:30px;letter-spacing:.12em;}
    .ps-subtitle{font-size:18px;}
    .ps-grid{grid-template-columns:repeat(2,1fr);gap:34px 16px;}
    .ps-circle{width:104px;height:104px;}
    .ps-circle svg{width:48px;height:48px;}
    .ps-item-title{font-size:14px;margin-top:16px;min-height:2.8em;}
    .ps-item-desc{font-size:12px;}
    .ps-cta{margin-top:56px;padding:34px 22px;}
    .ps-cta-title{font-size:21px;}
    .ps-btn{padding:14px 26px;font-size:14px;}
  }
  @media (max-width:360px){
    .ps-grid{grid-template-columns:1fr;gap:30px;}
    .ps-item-title{min-height:auto;}
  }