*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Microsoft YaHei","PingFang SC",sans-serif;background:#f7f8fc;color:#22293a;line-height:1.75}
a{color:#4c4392;text-decoration:none}
a:hover{color:#6a5ac0}
.wrap{max-width:960px;margin:0 auto;padding:0 22px}
nav{background:#fff;border-bottom:1px solid #e3e5ee;position:sticky;top:0;z-index:10}
nav .wrap{display:flex;align-items:center;height:56px;gap:24px}
nav .logo{font-weight:700;font-size:17px;color:#22293a}
nav .logo span{color:#4c4392}
nav a{color:#5d6478;font-size:14.5px}
nav a:hover,nav a.active{color:#4c4392}
header.hero{padding:78px 0 58px;background:linear-gradient(150deg,#3c3564 0%,#4c4392 55%,#6a5ac0 100%);text-align:center;color:#fff}
header.hero h1{font-size:38px;letter-spacing:1px}
header.hero p{margin-top:13px;color:#e4e0fb;font-size:16.5px}
.btns{margin-top:28px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:11px 28px;border-radius:8px;font-size:15px}
.btn.pri{background:#4c4392;color:#fff}
.btn.pri:hover{background:#5d52ad;color:#fff}
.btn.sec{border:1px solid rgba(255,255,255,.45);color:#fff}
.btn.sec:hover{border-color:#fff;color:#fff}
main{padding:54px 0 40px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:22px}
.card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 2px 14px rgba(60,53,100,.08);transition:.25s}
.card:hover{transform:translateY(-3px);box-shadow:0 8px 22px rgba(60,53,100,.15)}
.card h3{font-size:17px;margin-bottom:8px;color:#4c4392}
.card p{font-size:13.5px;color:#5d6478}
section{margin-bottom:50px}
h2.sec{font-size:23px;margin-bottom:8px;color:#1d2333}
h2.sec small{font-size:13px;color:#9aa0b5;font-weight:400;margin-left:10px;letter-spacing:1px}
p.desc{color:#5d6478;margin-bottom:20px;font-size:14.5px}
article.doc{background:#fff;border-radius:12px;padding:32px 34px;box-shadow:0 2px 14px rgba(60,53,100,.08)}
article.doc h1{font-size:25px;color:#1d2333;margin-bottom:6px}
article.doc h2{font-size:19px;color:#4c4392;margin:28px 0 10px;padding-top:14px;border-top:1px dashed #e3e5ee}
article.doc h3{font-size:16px;color:#3a3358;margin:18px 0 8px}
article.doc p,article.doc li{font-size:14.5px;color:#3c4356}
article.doc ul,article.doc ol{padding-left:22px;margin:8px 0 14px}
article.doc code{background:#efedfa;border-radius:4px;padding:2px 7px;font-size:13px;color:#4c4392;font-family:Consolas,Menlo,monospace}
pre{background:#2b2647;border-radius:8px;padding:16px 18px;overflow-x:auto;margin:10px 0 16px}
pre code{background:none;padding:0;color:#eceaf8;font-size:13px;line-height:1.6;font-family:Consolas,Menlo,monospace}
.tip{background:#efedfa;border-radius:8px;padding:12px 16px;font-size:13.5px;color:#4c4392;margin:12px 0}
ul.list{list-style:none;padding:0}
ul.list li{padding:11px 0;border-bottom:1px dashed #e3e5ee;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap}
ul.list li .t{color:#22293a;font-size:14.5px}
ul.list li .m{color:#9aa0b5;font-size:12.5px}
footer{border-top:1px solid #e3e5ee;padding:26px 0;text-align:center;font-size:13px;color:#9aa0b5}
.crumb{font-size:13px;color:#9aa0b5;margin-bottom:18px}