.duaer-auth {
	--paper: #eff2f1;
	--ink: #15181b;
	--muted: #60686d;
	--dim: #929a9e;
	--line: rgba(20, 23, 26, 0.14);
	--line-hi: rgba(20, 23, 26, 0.3);
	--font-display: 'Fraunces', 'Songti SC', 'STSong', Georgia, serif;
	--font-body:
		'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB',
		'Microsoft YaHei', sans-serif;
	position: relative;
	min-height: 100vh;
	margin: 0;
	background: var(--paper);
	color: var(--ink);
	font-family: var(--font-body);
	-webkit-font-smoothing: antialiased;
}

body {
	margin: 0;
}

.duaer-auth::after {
	content: '';
	position: fixed;
	inset: 0;
	z-index: 1000;
	pointer-events: none;
	opacity: 0.05;
	mix-blend-mode: multiply;
	background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='140' height='140' filter='url(%23n)'/></svg>");
}

.grid-bg {
	position: fixed;
	inset: 0;
	z-index: 0;
	pointer-events: none;
	background-image:
		linear-gradient(rgba(20, 23, 26, 0.045) 1px, transparent 1px),
		linear-gradient(90deg, rgba(20, 23, 26, 0.045) 1px, transparent 1px);
	background-size: 56px 56px;
	-webkit-mask-image: radial-gradient(ellipse 95% 62% at 50% -6%, black 12%, transparent 75%);
	mask-image: radial-gradient(ellipse 95% 62% at 50% -6%, black 12%, transparent 75%);
}

.shell {
	position: relative;
	z-index: 1;
	width: calc(100% - 48px);
	max-width: 1440px;
	margin: 0 auto;
}

.topbar {
	height: 4.25rem;
	display: flex;
	align-items: center;
	justify-content: space-between;
	border-bottom: 1px solid var(--line);
}

.brand {
	display: inline-flex;
	align-items: center;
	gap: 0.65rem;
	text-decoration: none;
	color: inherit;
}

.brand-mark {
	display: block;
	width: 1.75rem;
	height: 1.75rem;
	flex: none;
}

.brand-name {
	font-family: var(--font-display);
	font-size: 1.05rem;
	font-weight: 500;
	letter-spacing: -0.02em;
}

.top-nav {
	display: flex;
	align-items: center;
	gap: 1.15rem;
}

.nav-link {
	color: var(--muted);
	text-decoration: none;
	font-size: 0.8125rem;
	font-weight: 500;
}

.nav-link:hover,
.nav-link.is-current {
	color: var(--ink);
}

.lang {
	display: inline-flex;
	gap: 0.35rem;
}

.lang button {
	appearance: none;
	border: 0;
	padding: 0;
	background: none;
	color: var(--dim);
	font: inherit;
	font-size: 0.75rem;
	font-weight: 500;
	cursor: pointer;
}

.lang button.active,
.lang button:hover {
	color: var(--ink);
}

.stage {
	min-height: calc(100vh - 4.25rem);
	padding: 4.5rem 0 4rem;
}

.stage h1 {
	margin: 0;
	font-family: var(--font-display);
	font-size: clamp(2.5rem, 5vw, 4.25rem);
	font-weight: 400;
	line-height: 1.06;
	letter-spacing: -0.028em;
}

.lede {
	margin: 1.25rem 0 0;
	color: var(--muted);
	font-size: 0.9375rem;
	line-height: 1.72;
}

.stage.article h2 {
	margin: 2rem 0 0.75rem;
	font-family: var(--font-display);
	font-size: 1.35rem;
	font-weight: 500;
}

.stage.article p,
.stage.article li {
	color: var(--muted);
	font-size: 0.9375rem;
	line-height: 1.72;
}

.stage.article ol {
	margin: 0.5rem 0 0;
	padding-left: 1.25rem;
}

.stage.article a {
	color: var(--ink);
}

.how-kicker {
	display: flex;
	align-items: center;
	gap: 0.875rem;
	margin: 0 0 1rem;
	font-family: 'JetBrains Mono', ui-monospace, monospace;
	font-size: 0.625rem;
	font-weight: 500;
	letter-spacing: 0.2em;
	color: var(--muted);
	text-transform: uppercase;
}

.how-kicker::before {
	content: '';
	width: 2.75rem;
	height: 1px;
	background: var(--line-hi);
}

.primary-link {
	display: inline-block;
	margin-top: 2rem;
	padding: 0.7rem 1.1rem;
	border-radius: 999px;
	background: var(--ink);
	color: var(--paper) !important;
	text-decoration: none;
	font-size: 0.875rem;
	font-weight: 500;
}

.doc-list {
	margin: 1.5rem 0 0;
	padding: 0;
	list-style: none;
}

.doc-list a {
	display: block;
	padding: 0.85rem 0;
	border-bottom: 1px solid var(--line);
	color: var(--ink);
	text-decoration: none;
	font-size: 0.9375rem;
}

.doc-list a:hover {
	color: #e14a0e;
}

.site-footer {
	border-top: 1px solid var(--line);
	padding: 1.75rem 0 2.5rem;
	color: var(--dim);
	font-family: 'JetBrains Mono', ui-monospace, monospace;
	font-size: 0.625rem;
	letter-spacing: 0.04em;
}

.site-footer .shell {
	display: flex;
	justify-content: space-between;
	gap: 1rem;
}

.site-footer a {
	color: inherit;
	text-decoration: none;
}

.site-footer a:hover {
	color: var(--ink);
}

@media (max-width: 720px) {
	.site-footer .shell {
		flex-direction: column;
	}
}

.lang a { color: var(--dim); text-decoration: none; font-size: 0.75rem; font-weight: 500; }
.lang a.active, .lang a:hover { color: var(--ink); }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr)); gap: 14px; margin-top: 2rem; }
.card { display: block; min-height: 7.5rem; padding: 1.15rem 1.25rem 1.2rem; border: 1px solid var(--line-hi); border-radius: 12px; background: #f8faf9; text-decoration: none; color: inherit; }
.card:hover { border-color: var(--ink); }
.card-type { color: #e14a0e; font-family: "JetBrains Mono", ui-monospace, monospace; font-size: 0.5625rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; }
.card h3 { margin: 0.7rem 0 0.4rem; font-family: var(--font-display); font-size: 1.125rem; font-weight: 500; }
.card p { margin: 0; color: var(--dim); font-size: 0.75rem; line-height: 1.55; }
.stage.article pre { overflow: auto; margin: 1rem 0 0; padding: 1rem 1.1rem; border: 1px solid var(--line); border-radius: 12px; background: #f8faf9; font-family: "JetBrains Mono", ui-monospace, monospace; font-size: 0.75rem; line-height: 1.55; }
.stage.article pre code { font: inherit; }