:root {
    --bg: #f4f6f8;
    --card: #fff;
    --text: #1d2433;
    --muted: #667085;
    --line: #e6eaf0;
    --brand: #1f6feb;
    --brand-dark: #1554b8;
    --ok: #14804a;
    --err: #c62828;
    --warn: #b45309;
    --aside: #0f172a;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.55;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }

.site-header {
    background: #0f172a;
    color: #fff;
}
.site-header a { color: #fff; }
.nav { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 16px; }
.logo { font-weight: 700; font-size: 18px; letter-spacing: .04em; text-decoration: none !important; }
.nav-links { display: flex; align-items: center; gap: 16px; font-size: 14px; }
.nav-balance { color: #9ecbff; }
.site-main { padding: 28px 0 48px; }
.site-footer { color: var(--muted); font-size: 13px; padding: 24px 0 40px; text-align: center; }

.hero {
    background: linear-gradient(135deg, #0f172a, #1f4f9a);
    color: #fff;
    border-radius: 16px;
    padding: 36px 32px;
    margin-bottom: 28px;
}
.hero h1 { margin: 0 0 8px; font-size: 32px; }
.hero p { margin: 0; color: #d6e4ff; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 18px;
}
.card h3 { margin: 0 0 8px; }
.muted { color: var(--muted); font-size: 13px; }
.price { color: #c2410c; font-weight: 700; font-size: 18px; }

.btn {
    display: inline-block;
    border: 0;
    border-radius: 8px;
    padding: 9px 14px;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none !important;
}
.btn-sm { padding: 6px 10px; font-size: 13px; }
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-danger { background: var(--err); color: #fff; }
.btn-ghost { background: #eef2f7; color: var(--text); }
.btn-block { width: 100%; text-align: center; }

.alert { border-radius: 8px; padding: 10px 12px; margin-bottom: 16px; }
.alert-ok, .alert-success { background: #e8f7ee; color: var(--ok); }
.alert-error { background: #fdecec; color: var(--err); }
.alert-info { background: #eaf2ff; color: var(--brand-dark); }

.form { max-width: 420px; }
.form-wide { max-width: 760px; }
label { display: block; font-size: 13px; margin: 0 0 6px; color: var(--muted); }
input[type=text], input[type=password], input[type=number], select, textarea {
    width: 100%;
    border: 1px solid #d0d7e2;
    border-radius: 8px;
    padding: 9px 10px;
    font: inherit;
    margin-bottom: 12px;
    background: #fff;
}
textarea { min-height: 110px; font-family: Consolas, "Courier New", monospace; }
textarea.remark-box {
    min-height: 260px;
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    white-space: pre-wrap;
}
.auth-card { max-width: 420px; margin: 24px auto; }

.detail {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 20px;
    align-items: start;
}
.detail > :first-child { min-width: 0; }
.detail aside { width: 300px; max-width: 100%; }
.pkg { border: 1px solid var(--line); border-radius: 10px; padding: 14px; margin-bottom: 12px; }
code {
    font-family: Consolas, "Courier New", monospace;
    overflow-wrap: anywhere;
    word-break: break-all;
}
pre, .code {
    background: #0f172a;
    color: #e2e8f0;
    border-radius: 10px;
    padding: 12px;
    overflow: auto;
    font-size: 13px;
    white-space: pre-wrap;
    word-break: break-all;
}
table { width: 100%; border-collapse: collapse; background: #fff; table-layout: fixed; }
th, td { border-bottom: 1px solid var(--line); padding: 10px 8px; text-align: left; font-size: 13px; vertical-align: top; overflow-wrap: anywhere; }
th { background: #f8fafc; color: var(--muted); font-weight: 600; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; }
.badge-on { background: #e8f7ee; color: var(--ok); }
.badge-off { background: #fdecec; color: var(--err); }
.copy-row { display: flex; gap: 8px; align-items: stretch; }
.copy-row .key-box { flex: 1; margin: 0; }
.steps { margin: 12px 0 18px; padding-left: 18px; }
.steps li { margin: 6px 0; }
.code-tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 8px 0; }
.code-tabs button { border: 1px solid var(--line); background: #fff; border-radius: 8px; padding: 6px 10px; cursor: pointer; }
.code-tabs button.active { background: var(--brand); color: #fff; border-color: var(--brand); }
.code-block { position: relative; }
.code-block .btn { position: absolute; right: 8px; top: 8px; }
.page-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin: 0 0 14px;
    border-bottom: 1px solid var(--line);
}
.page-tabs a {
    display: inline-block;
    padding: 10px 16px;
    color: var(--muted);
    text-decoration: none !important;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    font-size: 14px;
}
.page-tabs a:hover { color: var(--text); }
.page-tabs a.active {
    color: var(--brand);
    font-weight: 600;
    border-bottom-color: var(--brand);
}
.page-tabs a .muted { font-weight: 400; }

.key-box { background: #f8fafc; border: 1px dashed #cbd5e1; border-radius: 8px; padding: 10px; word-break: break-all; font-family: Consolas, monospace; }

.admin-body { display: flex; min-height: 100vh; background: #eef2f6; }
.admin-aside {
    width: 220px;
    background: var(--aside);
    color: #cbd5e1;
    padding: 20px 14px;
    flex-shrink: 0;
}
.admin-aside .logo { color: #fff; display: block; margin-bottom: 18px; }
.admin-aside nav { display: flex; flex-direction: column; gap: 6px; }
.admin-aside a { color: #cbd5e1; padding: 8px 10px; border-radius: 8px; text-decoration: none; }
.admin-aside a:hover, .admin-aside a.active { background: #1e293b; color: #fff; }
.admin-main { flex: 1; min-width: 0; }
.admin-top { display: flex; justify-content: space-between; align-items: center; padding: 18px 24px 0; }
.admin-top h1 { margin: 0; font-size: 22px; }
.admin-content { padding: 18px 24px 40px; }
.stats { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat { background: #fff; border-radius: 12px; padding: 16px; }
.stat b { display: block; font-size: 24px; margin-top: 4px; }
.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; gap: 12px; }
.pager { display: flex; gap: 12px; align-items: center; justify-content: flex-end; padding: 12px 0 4px; font-size: 13px; }
.pager a { color: var(--brand); }
.demo-preview {
    margin: 14px 0;
    padding: 18px;
    border-radius: 16px;
    background: linear-gradient(160deg, #f8fafc, #eef2ff);
    text-align: center;
    box-shadow: inset 0 0 0 1px #e6eaf0;
}
.demo-preview img {
    display: inline-block;
    max-width: min(320px, 100%);
    height: auto;
    border-radius: 18px;
    background: #fff;
    box-shadow: 0 16px 40px rgba(15, 23, 42, 0.12);
}
.demo-preview p {
    margin: 10px 0 0;
    color: #64748b;
    font-size: 13px;
}

@media (max-width: 860px) {
    .detail { grid-template-columns: 1fr; }
    .detail aside { width: auto; }
    .admin-body { display: block; }
    .admin-aside { width: auto; }
    .nav { flex-wrap: wrap; padding: 10px 0; }
}