html,body{margin:0;padding:0}
body.book-root{font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:#eef0f7;color:#1e2448;line-height:1.75}
.book-root .ico{width:28px;height:28px}
.book-head{padding:20px 6vw 10px}
.book-head .brand{display:flex;gap:8px;align-items:center;font-weight:700;font-size:18px;color:#323C8C}
.book-head .nav-list{list-style:none;margin:12px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.book-head a{text-decoration:none;color:#323C8C;background:#fff;border:1px solid #c5cae3;padding:6px 12px;border-radius:8px;font-size:13px}
.book-main{padding:8px 6vw 64px}
.book-hero{background:#fff;border:1px solid #c5cae3;padding:22px;margin:0 0 20px}
.book-hero h1{margin:0 0 10px;font-size:26px;color:#323C8C}
.book-hero>p{margin:0 0 8px;max-width:44em}
.people{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:14px}
.person{background:#f6f7fc;border:1px solid #c5cae3;padding:14px;display:grid;grid-template-columns:40px 1fr;gap:10px;align-items:center}
.person .avatar{width:40px;height:40px;border-radius:50%;background:#323C8C;color:#fff;display:flex;align-items:center;justify-content:center}
.person .avatar .ico{width:22px;height:22px;stroke:#fff}
.person h3{margin:0;font-size:15px}
.person p{margin:4px 0 0;font-size:13px;color:#4a5278}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.cols .block{background:#fff;border:1px solid #c5cae3;padding:18px 20px;margin:0}
.cols .span2{grid-column:1/-1}
.block h2{margin:0 0 10px;font-size:20px;color:#323C8C}
.lead{color:#3c4468;margin:0 0 10px}
.trio{display:grid;grid-template-columns:1fr;gap:10px}
.card,.pair{background:#f6f7fc;border:1px solid #c5cae3;padding:12px 14px}
.card h3,.pair h3,.step h3{margin:4px 0;font-size:16px}
.step-list{list-style:none;margin:0;padding:0}
.step{display:grid;grid-template-columns:36px 1fr;gap:10px;margin:0 0 10px;background:#f6f7fc;border:1px solid #c5cae3;padding:10px 12px}
.step-n{width:28px;height:28px;border-radius:50%;background:#323C8C;color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse;font-size:14px}
th{background:#323C8C;color:#fff;padding:8px 10px;text-align:left}
td{padding:8px 10px;border-bottom:1px solid #d8dced;vertical-align:top}
.pair-grid{display:grid;grid-template-columns:1fr;gap:10px}
.plain-list{padding-left:1.2em}
.faq-list details{background:#f6f7fc;border:1px solid #c5cae3;padding:8px 12px;margin:0 0 8px}
.faq-list summary{cursor:pointer;font-weight:700;color:#323C8C}
.site-footer{grid-column:1/-1;padding-top:8px;color:#4a5278;font-size:13px}
@media (max-width:900px){
.people,.cols{grid-template-columns:1fr}
.cols .span2{grid-column:auto}
}