.sv-section{
    --sv-blue:#2E70F0;
    --sv-blue-deep:#1F5CD0;
    --sv-blue-light:#E9F6FF;
    --sv-blue-light-2:#E0F1FF;
    --sv-ink:#15171C;
    --sv-ink-strong:#0E2A4F;
    --sv-muted:#54708A;
    font-family:'Montserrat','Helvetica Neue',Arial,'PingFang SC','Microsoft YaHei',sans-serif;
    color:var(--sv-ink);
    background:#fff;
    padding:72px 20px 80px;
    box-sizing:border-box;
  }
  .sv-section *{box-sizing:border-box;}
  .sv-inner{max-width:1200px;margin:0 auto;}

  /* 标题区 */
  .sv-head{text-align:center;margin-bottom:54px;}
  .sv-title{
    margin:0;font-size:44px;font-weight:800;letter-spacing:.14em;
    text-transform:uppercase;line-height:1.1;color:var(--sv-ink);
  }
  .sv-title::after{
    content:"";display:block;width:64px;height:5px;margin:20px auto 0;
    border-radius:99px;background:linear-gradient(90deg,#5B90F7,var(--sv-blue-deep));
  }
  .sv-subtitle{margin:26px auto 0;max-width:560px;font-size:20px;font-weight:700;color:var(--sv-ink-strong);}

  /* 服务卡片网格 */
  .sv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:8px;}
  .sv-card{
    background:linear-gradient(180deg,var(--sv-blue-light) 0%,var(--sv-blue-light-2) 100%);
    border:1px solid #D2E9FF;border-radius:18px;padding:36px 24px 32px;text-align:center;
    transition:transform .28s ease, box-shadow .28s ease;
  }
  .sv-card:hover{transform:translateY(-6px);box-shadow:0 18px 34px rgba(46,112,240,.22);}
  .sv-circle{
    width:74px;height:74px;margin:0 auto 22px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    background:linear-gradient(160deg,#4C86F5 0%,var(--sv-blue) 55%,var(--sv-blue-deep) 100%);
    box-shadow:0 8px 18px rgba(46,112,240,.32);color:#fff;
  }
  .sv-circle svg{width:36px;height:36px;display:block;}
  .sv-card-title{
    margin:0;font-size:16px;font-weight:700;line-height:1.4;color:var(--sv-ink-strong);min-height:2.8em;
  }
  .sv-card-desc{margin:12px 0 0;font-size:13px;font-weight:400;line-height:1.65;color:var(--sv-muted);}

  /* 响应式 */
  @media (max-width:1024px){
    .sv-grid{grid-template-columns:repeat(3,1fr);gap:22px;}
    .sv-title{font-size:38px;}
  }
  @media (max-width:720px){
    .sv-section{padding:52px 18px 60px;}
    .sv-title{font-size:30px;letter-spacing:.12em;}
    .sv-subtitle{font-size:18px;}
    .sv-grid{grid-template-columns:repeat(2,1fr);gap:18px;}
    .sv-card{padding:28px 16px 24px;}
    .sv-circle{width:62px;height:62px;margin-bottom:18px;}
    .sv-circle svg{width:30px;height:30px;}
    .sv-card-title{font-size:14px;min-height:2.8em;}
    .sv-card-desc{font-size:12px;}
  }
  @media (max-width:360px){
    .sv-grid{grid-template-columns:1fr;gap:18px;}
    .sv-card-title{min-height:auto;}
  }