.pc-page{padding:54px 0 90px;background:linear-gradient(180deg,#f0f8fa,#fff)}
.pc-page-head{text-align:center;max-width:720px;margin:0 auto 36px}.pc-page-head>span{color:#1d6f93;font-size:.78rem;font-weight:900}.pc-page-head h1{margin:8px 0 12px;color:#153e53;font-size:clamp(1.7rem,3vw,2.7rem)}.pc-page-head p{color:#70838e}
.pc-category-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;align-items:start}
.pc-category-card{background:#fff;border:1px solid #dce6ea;border-radius:18px;overflow:hidden;box-shadow:0 12px 34px rgba(18,75,102,.06)}
.pc-category-card summary{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:20px;cursor:pointer;list-style:none;color:#173f53;font-weight:900}.pc-category-card summary::-webkit-details-marker{display:none}.pc-category-card[open] summary{background:#edf8fa;color:#176486}.pc-category-card[open] summary i{transform:rotate(180deg)}
.pc-category-body{max-height:620px;overflow-y:auto;padding:18px 20px 24px;border-top:1px solid #e2eaed;scrollbar-width:thin}.pc-view-all{display:block;margin-bottom:14px;padding:11px 13px;background:#176486;color:#fff!important;border-radius:10px;text-align:center;font-size:.78rem;font-weight:900}
.pc-tree{list-style:none;margin:0;padding:0}.pc-tree li{margin:0}.pc-tree a{display:block;padding:7px 9px;color:#4e6572;font-size:.78rem;border-radius:7px}.pc-tree a:hover{color:#176486;background:#f0f8fa}.pc-tree .pc-tree{margin-right:13px;padding-right:12px;border-right:1px solid #dce7eb}.pc-depth-0>li>a{color:#183f52;font-weight:900;font-size:.84rem}
@media(max-width:760px){.pc-page{padding:34px 0 70px}.pc-category-grid{grid-template-columns:1fr}.pc-category-card summary{padding:17px}.pc-category-body{max-height:65vh}}