*{box-sizing:border-box}body{margin:0;font-family:Arial,"Microsoft YaHei",sans-serif;background:#f5f6f8;color:#222}a{text-decoration:none;color:inherit}
.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center}.login-box{width:380px;background:#fff;padding:36px;border-radius:14px;box-shadow:0 10px 36px #0002}
.input{width:100%;padding:12px 13px;border:1px solid #d8dce3;border-radius:8px}.btn{border:0;border-radius:8px;padding:11px 15px;cursor:pointer;background:#222;color:#fff}.btn.secondary{background:#eef0f4;color:#222}
.layout{display:grid;grid-template-columns:260px 1fr;min-height:100vh}.sidebar{background:#17191f;color:#eee;padding:22px 16px}.brand{font-size:21px;font-weight:700;margin:0 8px 25px}
.nav-title{font-size:12px;color:#8e95a3;margin:22px 8px 8px}.domain-link{display:block;padding:10px;border-radius:7px;margin:2px 0}.domain-link:hover{background:#272a33}.main{padding:26px 30px}
.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}.card{background:#fff;border:1px solid #e5e7ec;border-radius:12px;padding:20px;margin-bottom:20px}
.search{display:flex;gap:10px;max-width:850px}.search input{flex:1}.split{display:grid;grid-template-columns:1fr 1fr;gap:20px}.mail-list{border:1px solid #e6e8ed;border-radius:10px;overflow:hidden}
.mail-row{display:grid;grid-template-columns:220px 1fr 190px;gap:12px;padding:12px 14px;border-bottom:1px solid #eee;background:#fff}.mail-row:last-child{border-bottom:0}.mail-row:hover{background:#fafafa}
.small{font-size:13px;color:#6f7682}.err{color:#b00020;padding:10px 0}.ok{color:#08752c;padding:10px 0}.grid-form{display:grid;grid-template-columns:1fr 1fr;gap:12px}.grid-form .full{grid-column:1/-1}
.account-item{display:flex;justify-content:space-between;padding:11px 0;border-bottom:1px solid #eee}.message-body{background:#fff;padding:20px;border:1px solid #e5e7ec;border-radius:10px;overflow:auto}
@media(max-width:900px){.layout{grid-template-columns:1fr}.split,.grid-form{grid-template-columns:1fr}.mail-row{grid-template-columns:1fr}.main{padding:18px}}