:root {
    --navy: #16324f;
    --blue: #1f4e79;
    --accent: #2e75b6;
    --grey: #6b7683;
    --line: #e2e8f0;
    --bg: #f5f7fa;
    --card: #ffffff;
    --ok: #0f7b52;
    --warn: #a35b00;
    --danger: #b3261e;
    --radius: 10px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
    font-size: 14px;
    color: #1f2937;
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------------------------------------------------------------- 框架 */
.shell { display: flex; min-height: 100vh; }

.sidebar {
    width: 232px;
    flex: 0 0 232px;
    background: var(--navy);
    color: #cbd6e2;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px 18px 18px;
    border-bottom: 1px solid rgba(255,255,255,.08);
}

.brand-mark {
    width: 34px; height: 34px;
    border-radius: 9px;
    background: linear-gradient(135deg, #2e75b6, #1f4e79);
    color: #fff;
    display: grid; place-items: center;
    font-weight: 700; font-size: 17px;
}

.brand-text { font-size: 15px; font-weight: 600; color: #fff; line-height: 1.25; }
.brand-text small { display: block; font-size: 10px; color: #7f95ad; font-weight: 400; letter-spacing: .04em; }

.nav { padding: 12px 10px; display: flex; flex-direction: column; gap: 2px; flex: 1; }

.nav-item {
    display: flex; align-items: center; gap: 10px;
    padding: 9px 12px;
    border-radius: 8px;
    color: #b9c7d6;
    font-size: 13.5px;
}
.nav-item:hover { background: rgba(255,255,255,.06); color: #fff; text-decoration: none; }
.nav-item.is-active { background: rgba(46,117,182,.28); color: #fff; }

.sidebar-foot { padding: 14px; border-top: 1px solid rgba(255,255,255,.08); }
.user-chip { display: flex; align-items: center; gap: 10px; }
.avatar {
    width: 32px; height: 32px; border-radius: 50%;
    background: rgba(255,255,255,.12);
    display: grid; place-items: center; color: #fff; font-weight: 600;
}
.user-meta { display: flex; flex-direction: column; line-height: 1.3; }
.user-meta b { color: #fff; font-size: 13px; font-weight: 500; }
.user-meta small { color: #8ea3b8; font-size: 11px; }
.logout { display: inline-block; margin-top: 10px; font-size: 12px; color: #8ea3b8; }
.logout:hover { color: #fff; }

.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.topbar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 18px 28px;
    background: #fff;
    border-bottom: 1px solid var(--line);
}
.topbar h1 { margin: 0; font-size: 18px; font-weight: 600; color: var(--navy); }
.topbar-actions { display: flex; gap: 8px; }

.content { padding: 22px 28px 40px; }

/* ---------------------------------------------------------------- 组件 */
.flash {
    padding: 10px 14px; border-radius: 8px; margin-bottom: 14px; font-size: 13px;
    border: 1px solid transparent;
}
.flash-ok { background: #eaf7f1; color: var(--ok); border-color: #c6e9d9; }
.flash-error { background: #fdecea; color: var(--danger); border-color: #f7c9c4; }
.flash-info { background: #eaf2fb; color: var(--blue); border-color: #cfe0f3; }

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 18px 20px;
    margin-bottom: 18px;
}
.card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.card-head h2 { margin: 0; font-size: 15px; font-weight: 600; color: var(--navy); }
.card-head .hint { color: var(--grey); font-size: 12px; }

.grid { display: grid; gap: 14px; }
.grid-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }

.stat {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 16px 18px;
}
.stat .label { color: var(--grey); font-size: 12px; }
.stat .value { font-size: 26px; font-weight: 650; color: var(--navy); margin-top: 6px; line-height: 1.1; }
.stat .sub { color: var(--grey); font-size: 12px; margin-top: 4px; }

.table { width: 100%; border-collapse: collapse; }
.table th {
    text-align: left; font-size: 12px; font-weight: 600; color: var(--grey);
    padding: 10px 12px; border-bottom: 1px solid var(--line); white-space: nowrap;
}
.table td { padding: 11px 12px; border-bottom: 1px solid #f0f3f7; vertical-align: middle; }
.table tr:last-child td { border-bottom: none; }
.table tr:hover td { background: #fafbfd; }
.table .num { font-variant-numeric: tabular-nums; }

.badge {
    white-space: nowrap;
    display: inline-block; padding: 2px 8px; border-radius: 999px;
    font-size: 12px; line-height: 18px;
}
.badge-ok { background: #e7f5ee; color: var(--ok); }
.badge-warn { background: #fdf3e2; color: var(--warn); }
.badge-info { background: #e9f1fa; color: var(--blue); }
.badge-muted { background: #eef1f5; color: var(--grey); }

.btn {
    display: inline-flex; align-items: center; gap: 6px; white-space: nowrap;
    padding: 8px 14px; border-radius: 7px;
    border: 1px solid var(--line); background: #fff; color: #334155;
    font-size: 13px; cursor: pointer; text-decoration: none;
}
.btn:hover { background: #f8fafc; text-decoration: none; }
.btn-primary { background: var(--blue); border-color: var(--blue); color: #fff; }
.btn-primary:hover { background: #1a446a; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.form-row { margin-bottom: 14px; }
.form-row label { display: block; font-size: 12.5px; color: #475569; margin-bottom: 6px; }
.form-row .req { color: var(--danger); }
.input, .select, .textarea {
    width: 100%; padding: 9px 11px; font-size: 13.5px;
    border: 1px solid #d7dee7; border-radius: 7px; background: #fff;
    font-family: inherit; color: #1f2937;
}
.input:focus, .select:focus, .textarea:focus {
    outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(46,117,182,.12);
}
.textarea { min-height: 90px; resize: vertical; }
.help { font-size: 12px; color: var(--grey); margin-top: 5px; }
.error { font-size: 12px; color: var(--danger); margin-top: 5px; }

.filters { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 14px; }
.filters .input, .filters .select { width: auto; min-width: 150px; }

.pager { display: flex; gap: 6px; justify-content: flex-end; margin-top: 14px; }
.pager a, .pager span {
    padding: 5px 10px; border: 1px solid var(--line); border-radius: 6px;
    font-size: 12.5px; color: #475569; background: #fff;
}
.pager .is-current { background: var(--blue); color: #fff; border-color: var(--blue); }

.empty { text-align: center; padding: 46px 10px; color: var(--grey); }
.empty h3 { color: #475569; margin: 0 0 6px; font-weight: 500; }

.kv { display: grid; grid-template-columns: 120px 1fr; gap: 10px 16px; font-size: 13.5px; }
.kv dt { color: var(--grey); }
.kv dd { margin: 0; color: #1f2937; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 16px; }
.tab {
    padding: 9px 14px; font-size: 13px; color: var(--grey); border-bottom: 2px solid transparent;
}
.tab.is-active { color: var(--blue); border-bottom-color: var(--accent); font-weight: 500; }

.muted { color: var(--grey); }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 12.5px; }
.right { text-align: right; }
.nowrap { white-space: nowrap; }

/* ---------------------------------------------------------------- 登录页 */
.auth {
    min-height: 100vh; display: grid; place-items: center;
    background: radial-gradient(1200px 600px at 20% 0%, #1f3c5c 0%, #0f2338 55%, #0a1a2a 100%);
}
.auth-card {
    width: 380px; background: #fff; border-radius: 14px; padding: 32px 30px 26px;
    box-shadow: 0 24px 60px rgba(0,0,0,.35);
}
.auth-card h1 { margin: 0 0 4px; font-size: 20px; color: var(--navy); }
.auth-card .sub { color: var(--grey); font-size: 12.5px; margin-bottom: 22px; }
.auth-card .btn { width: 100%; justify-content: center; margin-top: 6px; }
.auth-foot { margin-top: 18px; font-size: 11.5px; color: #94a3b8; text-align: center; }

@media (max-width: 900px) {
    .sidebar { display: none; }
    .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* ---------------- 区块搭建器 ---------------- */
.blk-palette { display: flex; gap: 8px; flex-wrap: wrap; }
.blk-item { border: 1px solid var(--line); border-radius: 10px; margin-bottom: 12px; background: #fff; }
.blk-head {
    display: flex; align-items: center; justify-content: space-between;
    padding: 8px 12px; background: #f7f9fc; border-bottom: 1px solid var(--line);
    border-radius: 10px 10px 0 0; font-size: 13px;
}
.blk-ops { display: flex; gap: 6px; }
.blk-body { padding: 12px 14px 2px; }
.blk-body .form-row:last-child { margin-bottom: 12px; }

/* ---------------- 设置项 ---------------- */
.setting-row {
    display: grid; grid-template-columns: 220px minmax(0, 1fr);
    gap: 18px; padding: 12px 0; border-bottom: 1px solid #f0f3f7;
}
.setting-row:last-child { border-bottom: none; }
.setting-label label { font-size: 13.5px; color: #334155; }
.setting-key { font-size: 11px; color: #a6b0bc; margin-top: 3px; }
.setting-control .help { margin-top: 6px; }
@media (max-width: 760px) {
    .setting-row { grid-template-columns: 1fr; gap: 6px; }
}

/* ---------------- 二级菜单 ---------------- */
.nav {
    padding: 6px 8px 10px; display: flex; flex-direction: column; gap: 0;
    flex: 1; overflow-y: auto; scrollbar-width: thin; scrollbar-color: rgba(255,255,255,.18) transparent;
}
.nav::-webkit-scrollbar { width: 6px; }
.nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,.16); border-radius: 3px; }
.nav-group { margin-bottom: 1px; }
.nav-group-head {
    display: flex; align-items: center; justify-content: space-between;
    width: 100%; padding: 4px 12px; border: 0; background: none; cursor: pointer;
    color: #7f95ad; font-size: 11px; letter-spacing: .06em; font-family: inherit;
    border-radius: 6px;
}
.nav-group-head:hover { color: #cbd6e2; background: rgba(255,255,255,.04); }
.nav-group-head .chev { transition: transform .15s ease; opacity: .65; }
.nav-group.is-open .nav-group-head .chev { transform: rotate(90deg); }
.nav-group.is-open .nav-group-head { color: #9fb3c8; }
.nav-items { display: none; padding: 2px 0 6px; }
.nav-group.is-open .nav-items { display: block; }
.nav-item { padding: 4px 12px 4px 14px; font-size: 12.5px; gap: 8px; }
.sidebar-foot { padding: 8px 14px; }
.avatar { width: 30px; height: 30px; }

.topbar-title { display: flex; flex-direction: column; }
.crumb { font-size: 11px; color: #94a3b8; letter-spacing: .08em; margin-bottom: 1px; }