/* 后台样式：左侧导航 + 白卡片，与前台同一套配色 */
:root {
    --c-primary: #0e5aa7;
    --c-primary-d: #0a4278;
    --c-primary-l: #eaf2fb;
    --c-green: #0f9d76;
    --c-dark: #0a1f33;
    --c-text: #1f2d3d;
    --c-sub: #64748b;
    --c-line: #e6edf5;
    --c-bg: #f5f8fb;
    --font: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
body {
    margin: 0; background: var(--c-bg); color: var(--c-text);
    font-family: var(--font); font-size: 15px; line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
code { background: #eef2f7; padding: 1px 6px; border-radius: 5px; font-size: 13px; }

/* ---------------------------------------------------------------- 布局 */
.a-shell { display: grid; grid-template-columns: 236px 1fr; min-height: 100vh; }
.a-side {
    background: var(--c-dark); color: rgba(255,255,255,.72); padding: 22px 16px;
    display: flex; flex-direction: column; gap: 22px; position: sticky; top: 0; height: 100vh;
}
.a-brand { display: flex; gap: 12px; align-items: center; }
.a-mark {
    width: 40px; height: 40px; border-radius: 11px; flex: none;
    background: linear-gradient(135deg, var(--c-primary), var(--c-green));
    color: #fff; font-weight: 800; display: grid; place-items: center; font-size: 18px;
}
.a-brand b { color: #fff; display: block; font-size: 15.5px; }
.a-brand small { font-size: 12px; color: rgba(255,255,255,.5); }
.a-nav { display: flex; flex-direction: column; gap: 4px; }
.a-nav a {
    display: flex; align-items: center; gap: 10px; padding: 11px 14px; border-radius: 10px;
    font-size: 15px; transition: .18s;
}
.a-nav a span { width: 18px; text-align: center; opacity: .9; }
.a-nav a:hover { background: rgba(255,255,255,.08); color: #fff; }
.a-nav a.on { background: var(--c-primary); color: #fff; font-weight: 600; }
.a-side-foot { margin-top: auto; display: flex; flex-direction: column; gap: 8px; font-size: 14px; }
.a-who { padding: 10px 14px 12px; margin-bottom: 4px; border-top: 1px solid rgba(255,255,255,.08); }
.a-who b { display: block; font-size: 14px; color: #fff; }
.a-who span { display: block; font-size: 11.5px; color: rgba(255,255,255,.5); margin-top: 3px; line-height: 1.4; }
.a-side-foot a { padding: 8px 14px; border-radius: 9px; color: rgba(255,255,255,.62); }
.a-side-foot a:hover { background: rgba(255,255,255,.08); color: #fff; }

.a-main { padding: 28px 32px 60px; min-width: 0; }
.a-page-head { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-bottom: 22px; flex-wrap: wrap; }
.a-page-head h1 { font-size: 24px; margin: 0; }
.a-actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------------------------------------------------------------- 组件 */
.a-card { background: #fff; border: 1px solid var(--c-line); border-radius: 14px; padding: 22px 24px; }
.a-card + .a-card { margin-top: 20px; }
.a-card h2 { font-size: 17px; margin: 0 0 14px; }
.a-grid2 { display: grid; grid-template-columns: 1.25fr 1fr; gap: 20px; margin: 20px 0; }

.a-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.a-stat { background: #fff; border: 1px solid var(--c-line); border-radius: 14px; padding: 20px 22px; }
.a-stat b { display: block; font-size: 30px; color: var(--c-primary); line-height: 1.2; }
.a-stat span { font-size: 13.5px; color: var(--c-sub); }

.a-btn {
    display: inline-flex; align-items: center; gap: 6px; height: 40px; padding: 0 18px;
    border-radius: 10px; border: 1px solid var(--c-line); background: #fff; color: var(--c-text);
    font-size: 14.5px; cursor: pointer; transition: .18s; font-family: inherit;
}
.a-btn:hover { border-color: var(--c-primary); color: var(--c-primary); }
.a-btn-main { background: var(--c-primary); border-color: var(--c-primary); color: #fff; font-weight: 600; }
.a-btn-main:hover { background: var(--c-primary-d); color: #fff; }

.a-link { color: var(--c-primary); cursor: pointer; background: none; border: 0; padding: 0; font: inherit; }
.a-link:hover { text-decoration: underline; }
.a-link-danger { color: #dc2626; margin-left: 10px; }
.a-dim { color: var(--c-sub); }

.a-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.a-table th {
    text-align: left; font-weight: 600; color: var(--c-sub); font-size: 13px;
    padding: 10px 12px; border-bottom: 1px solid var(--c-line); white-space: nowrap;
}
.a-table td { padding: 12px; border-bottom: 1px solid #f1f5f9; vertical-align: top; }
.a-table tr:hover td { background: #fafcfe; }
.a-row-done td { opacity: .62; }

.a-badge { display: inline-block; font-size: 12.5px; padding: 2px 10px; border-radius: 999px; background: #eef2f7; color: var(--c-sub); }
.a-badge-ok { background: #e7f8f1; color: #0a7d5d; }
.a-badge-warn { background: #fff4e6; color: #b45309; }

.a-filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.a-chip { padding: 6px 14px; border-radius: 999px; border: 1px solid var(--c-line); font-size: 13.5px; background: #fff; }
.a-chip:hover { border-color: var(--c-primary); color: var(--c-primary); }
.a-chip.on { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }

.a-pager { display: flex; gap: 8px; margin-top: 18px; }
.a-pager a, .a-pager span {
    min-width: 36px; height: 36px; padding: 0 12px; border-radius: 9px; border: 1px solid var(--c-line);
    display: grid; place-items: center; font-size: 13.5px; background: #fff;
}
.a-pager .cur { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }

.a-flash { padding: 12px 16px; border-radius: 10px; margin-bottom: 18px; font-size: 14.5px; background: #e7f8f1; color: #0a7d5d; border: 1px solid #bde9d8; }
.a-flash-err { background: #fef2f2; color: #b91c1c; border-color: #fecaca; }

/* 表单 */
.a-form { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.a-form label { display: flex; flex-direction: column; gap: 7px; font-size: 14px; }
.a-form label > span:first-child { color: var(--c-sub); font-size: 13.5px; }
.a-form input[type=text], .a-form input[type=number], .a-form input[type=password],
.a-form input[type=datetime-local], .a-form input:not([type]), .a-form select, .a-form textarea {
    width: 100%; border: 1px solid var(--c-line); border-radius: 10px; padding: 10px 13px;
    font-size: 14.5px; font-family: inherit; background: #fff; color: var(--c-text);
}
.a-form input:focus, .a-form select:focus, .a-form textarea:focus {
    outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(14,90,167,.10);
}
.a-form textarea { resize: vertical; }
.a-col2 { grid-column: 1 / -1; }
.a-form-foot { display: flex; gap: 10px; margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--c-line); }

/* 登录页 */
.a-login-body { display: grid; place-items: center; min-height: 100vh; background: linear-gradient(135deg, #08243d, #0e5aa7 60%, #0f9d76); }
.a-login {
    width: min(400px, calc(100% - 32px)); background: #fff; border-radius: 18px;
    padding: 34px 30px; box-shadow: 0 24px 60px rgba(0,0,0,.28); display: flex; flex-direction: column; gap: 16px;
}
.a-login-brand { display: flex; gap: 12px; align-items: center; margin-bottom: 6px; }
.a-login-brand b { display: block; font-size: 16.5px; }
.a-login-brand small { color: var(--c-sub); font-size: 12.5px; }
.a-login label { display: flex; flex-direction: column; gap: 7px; font-size: 13.5px; color: var(--c-sub); }
.a-login input {
    height: 46px; border: 1px solid var(--c-line); border-radius: 10px; padding: 0 14px; font-size: 15px;
}
.a-login input:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px rgba(14,90,167,.1); }
.a-login .a-btn { justify-content: center; height: 46px; margin-top: 6px; }
.a-hint { font-size: 12.5px; color: var(--c-sub); margin: 0; }
.a-list { margin: 0; padding-left: 20px; color: var(--c-sub); font-size: 14.5px; }
.a-list li { margin-bottom: 8px; }

@media (max-width: 900px) {
    .a-shell { grid-template-columns: 1fr; }
    .a-side { position: static; height: auto; flex-direction: row; align-items: center; gap: 12px; flex-wrap: wrap; padding: 14px; }
    .a-nav { flex-direction: row; overflow-x: auto; width: 100%; }
    .a-nav a { white-space: nowrap; }
    .a-side-foot { margin: 0; flex-direction: row; }
    .a-main { padding: 18px 14px 50px; }
    .a-form, .a-grid2, .a-stats { grid-template-columns: 1fr; }
    .a-table { font-size: 13.5px; }
}