:root {
	--primary: #4F63D8;
	--primary-dark: #3D4FB8;
	--primary-light: #E8EBF8;
	--danger: #EF4444;
	--warn: #F59E0B;
	--danger-dark: #DC2626;
	--wen1: #111827;
	--wen2: #4B5563;
	--wen3: #6B7280;
	--wen4: #9CA3AF;
	--bg1: #F9FAFB;
	--bg2: #FFFFFF;
	--bian1: #E5E7EB;
	--radius-sm: 8px;
	--radius: 16px;
	--radius-lg: 24px;
	--max-w: 760px;
}

* { box-sizing: border-box; }

html, body {
	margin: 0;
	padding: 0;
	background: var(--bg1);
	color: var(--wen1);
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Plus Jakarta Sans", "Helvetica Neue", Arial, sans-serif;
	font-size: 16px;
	line-height: 1.65;
	-webkit-text-size-adjust: 100%;
}

.header {
	background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
	color: #fff;
	padding: 32px 24px;
	text-align: center;
}

.header .brand {
	font-size: 14px;
	letter-spacing: 2px;
	text-transform: uppercase;
	opacity: 0.85;
	margin-bottom: 8px;
	font-weight: 600;
}

.header h1 {
	margin: 0;
	font-size: 26px;
	font-weight: 800;
	letter-spacing: -0.5px;
}

.header .subtitle {
	margin-top: 8px;
	font-size: 14px;
	opacity: 0.9;
}

.container {
	max-width: var(--max-w);
	margin: 0 auto;
	padding: 32px 24px 80px;
}

.card {
	background: var(--bg2);
	border: 1px solid var(--bian1);
	border-radius: var(--radius);
	padding: 32px 28px;
	margin-bottom: 24px;
	box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}

h2 {
	font-size: 20px;
	font-weight: 700;
	color: var(--wen1);
	margin: 32px 0 12px;
	letter-spacing: -0.3px;
}

h2:first-child { margin-top: 0; }

h3 {
	font-size: 16px;
	font-weight: 700;
	color: var(--wen1);
	margin: 24px 0 8px;
}

p {
	margin: 0 0 16px;
	color: var(--wen2);
}

ul, ol {
	color: var(--wen2);
	padding-left: 24px;
	margin: 0 0 16px;
}

li { margin-bottom: 8px; }

.meta {
	background: var(--primary-light);
	color: var(--primary-dark);
	padding: 12px 16px;
	border-radius: var(--radius-sm);
	font-size: 14px;
	margin-bottom: 24px;
	font-weight: 500;
}

.meta strong { color: var(--primary-dark); }

.footer {
	text-align: center;
	color: var(--wen4);
	font-size: 13px;
	padding: 32px 24px;
	border-top: 1px solid var(--bian1);
	background: var(--bg2);
	margin-top: 40px;
}

.footer a { color: var(--wen3); text-decoration: none; margin: 0 12px; }
.footer a:hover { color: var(--primary); }

/* Form styles */
.form-group { margin-bottom: 20px; }
.form-group label {
	display: block;
	font-size: 14px;
	font-weight: 600;
	color: var(--wen1);
	margin-bottom: 6px;
}
.form-group input,
.form-group textarea {
	width: 100%;
	padding: 12px 14px;
	border: 1px solid var(--bian1);
	border-radius: var(--radius-sm);
	font-size: 16px;
	font-family: inherit;
	color: var(--wen1);
	background: var(--bg2);
	transition: border-color 0.15s, box-shadow 0.15s;
}
.form-group input:focus,
.form-group textarea:focus {
	outline: none;
	border-color: var(--primary);
	box-shadow: 0 0 0 3px rgba(79, 99, 216, 0.15);
}
.form-group .hint {
	font-size: 13px;
	color: var(--wen4);
	margin-top: 4px;
}

.btn {
	display: inline-block;
	padding: 14px 28px;
	border: none;
	border-radius: var(--radius-sm);
	font-size: 15px;
	font-weight: 700;
	cursor: pointer;
	transition: opacity 0.15s, transform 0.05s;
	font-family: inherit;
}
.btn:active { transform: scale(0.98); }
.btn-primary {
	background: var(--primary);
	color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger {
	background: var(--danger);
	color: #fff;
}
.btn-danger:hover { background: var(--danger-dark); }

.warning-box {
	background: #FEF2F2;
	border-left: 4px solid var(--danger);
	padding: 16px 20px;
	border-radius: var(--radius-sm);
	margin-bottom: 24px;
	color: #7F1D1D;
}
.warning-box strong { color: #991B1B; }

.success-box {
	background: #F0FDF4;
	border-left: 4px solid #22C55E;
	padding: 20px;
	border-radius: var(--radius-sm);
	color: #14532D;
	display: none;
}
.success-box.show { display: block; }

.error-box {
	background: #FEF2F2;
	border-left: 4px solid var(--danger);
	padding: 16px 20px;
	border-radius: var(--radius-sm);
	color: #7F1D1D;
	margin-top: 16px;
	display: none;
}
.error-box.show { display: block; }

.fallback-box {
	background: #FFFBEB;
	border-left: 4px solid var(--warn);
	padding: 16px 20px;
	border-radius: var(--radius-sm);
	color: #78350F;
	margin-top: 16px;
	display: none;
}
.fallback-box.show { display: block; }
.fallback-box p { color: inherit; margin: 8px 0 0; }
.fallback-box a { color: var(--primary-dark); font-weight: 600; }

@media (max-width: 640px) {
	.card { padding: 24px 20px; }
	.header h1 { font-size: 22px; }
	h2 { font-size: 18px; }
}