/* templatein10 — build 2026-08-27 — 参考 riunited.org/cankao/5（结构/UI神似，非克隆） */

:root {
	--color-primary: #b5502f;      /* 陶土砖红 */
	--color-primary-dark: #8f3e23;
	--color-primary-tint: #f6e6de;
	--color-secondary: #2e3a4f;    /* 深灰蓝 */
	--color-secondary-tint: #e7eaef;
	--color-bg: #f7f6f3;
	--color-surface: #ffffff;
	--color-text: #26262a;
	--color-text-muted: #5c6069;
	--color-border: #e2ddd5;
	--radius-sm: 6px;
	--radius-md: 10px;
	--shadow-soft: 0 18px 44px -22px rgba(46, 58, 79, 0.35);
	--maxw: 780px;
	--maxw-wide: 1040px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
	margin: 0;
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
	background: var(--color-bg);
	color: var(--color-text);
	line-height: 1.65;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary-dark); }
p:empty { display: none; }

.skip-link {
	position: absolute;
	left: -999px;
	top: 0;
	background: var(--color-secondary);
	color: #fff;
	padding: 10px 16px;
	z-index: 1000;
}
.skip-link:focus { left: 10px; top: 10px; }

/* Header */
.site-header {
	background: var(--color-surface);
	border-bottom: 1px solid var(--color-border);
	position: sticky;
	top: 0;
	z-index: 50;
}
.header-inner {
	max-width: var(--maxw-wide);
	margin: 0 auto;
	padding: 14px 20px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 16px;
}
.brand {
	display: flex;
	align-items: center;
	gap: 10px;
	text-decoration: none;
	color: var(--color-text);
	font-weight: 700;
	font-size: 1.1rem;
}
.brand-logo { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; }
.main-nav ul {
	list-style: none;
	display: flex;
	gap: 22px;
	margin: 0;
	padding: 0;
}
.main-nav a {
	text-decoration: none;
	color: var(--color-text);
	font-weight: 600;
	font-size: 0.95rem;
}
.main-nav a:hover { color: var(--color-primary); }
.nav-toggle {
	display: none;
	flex-direction: column;
	justify-content: center;
	gap: 5px;
	width: 34px;
	height: 34px;
	background: none;
	border: none;
	cursor: pointer;
}
.nav-toggle span {
	display: block;
	height: 2px;
	background: var(--color-text);
	border-radius: 2px;
}

@media (max-width: 760px) {
	.main-nav {
		display: none;
		position: absolute;
		top: 100%;
		left: 0;
		right: 0;
		background: var(--color-surface);
		border-bottom: 1px solid var(--color-border);
		padding: 10px 20px 18px;
	}
	.main-nav.is-open { display: block; }
	.main-nav ul { flex-direction: column; gap: 12px; }
	.nav-toggle { display: flex; }
}

/* Top banner */
.top-banner img {
	width: 100%;
	max-height: 420px;
	object-fit: cover;
}

/* Hero */
.hero {
	background: var(--color-surface);
	border-bottom: 1px solid var(--color-border);
	padding: 40px 20px 34px;
	text-align: center;
}
.hero-compact { padding: 32px 20px 26px; }
.hero-inner { max-width: var(--maxw); margin: 0 auto; }
.hero-icon {
	width: 96px;
	height: 96px;
	border-radius: 50%;
	object-fit: cover;
	margin: 0 auto 16px;
	box-shadow: var(--shadow-soft);
}
.hero-title {
	font-size: 1.6rem;
	line-height: 1.3;
	margin: 0 0 12px;
	color: var(--color-secondary);
}
.hero-desc {
	color: var(--color-text-muted);
	margin: 0 0 20px;
	font-size: 1rem;
}
.reading-time {
	color: var(--color-text-muted);
	font-size: 0.85rem;
	margin: 14px 0 0;
}

/* Buttons */
.btn {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	padding: 12px 26px;
	border-radius: var(--radius-sm);
	font-weight: 700;
	text-decoration: none;
	font-size: 0.98rem;
	border: 2px solid transparent;
}
.btn-icon { width: 18px; height: 18px; }
.btn-primary {
	background: var(--color-primary);
	color: #fff;
}
.btn-primary:hover { background: var(--color-primary-dark); color: #fff; }
.btn-secondary {
	background: var(--color-surface);
	color: var(--color-secondary);
	border-color: var(--color-secondary);
}
.btn-secondary:hover { background: var(--color-secondary); color: #fff; }

/* Meta chips */
.meta-chip-row {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 10px;
	margin-top: 18px;
}
.meta-chip {
	background: var(--color-secondary-tint);
	color: var(--color-secondary);
	padding: 6px 14px;
	border-radius: var(--radius-sm);
	font-size: 0.82rem;
	font-weight: 600;
}

/* Main article content */
.page-main { padding: 8px 20px 50px; }
.article-content {
	max-width: var(--maxw);
	margin: 0 auto;
}

.article-content h2 {
	background: var(--color-primary);
	color: #fff;
	text-align: center;
	padding: 14px 20px;
	border-radius: var(--radius-md);
	font-size: 1.2rem;
	margin: 40px 0 20px;
}
.article-content h2:first-child { margin-top: 0; }

.article-content h3 {
	text-align: center;
	color: var(--color-secondary);
	border: 2px solid var(--color-primary);
	background: var(--color-primary-tint);
	border-radius: var(--radius-sm) var(--radius-sm) 0 0;
	padding: 10px 16px;
	font-size: 1.02rem;
	margin: 26px 0 0;
}
.article-content h3 + p,
.article-content h3 + .content-figure,
.article-content h3 + div {
	border: 2px solid var(--color-primary);
	border-top: none;
	border-radius: 0 0 var(--radius-sm) var(--radius-sm);
	padding: 14px 16px;
	margin: 0 0 20px;
}

.article-content p { margin: 0 0 16px; color: var(--color-text); }
.article-content strong { color: var(--color-secondary); }

.article-content ul,
.article-content ol {
	margin: 0 0 20px;
	padding-left: 22px;
}
.article-content li { margin-bottom: 8px; }

.article-content table {
	width: 100%;
	border-collapse: collapse;
	margin: 0 0 24px;
	font-size: 0.92rem;
}
.article-content th,
.article-content td {
	border: 1px solid var(--color-border);
	padding: 10px 12px;
	text-align: left;
}
.article-content th { background: var(--color-secondary-tint); }

.content-figure {
	margin: 0 0 22px;
	text-align: center;
}
.content-figure img {
	border-radius: var(--radius-md);
	margin: 0 auto;
	box-shadow: var(--shadow-soft);
}

/* Pros/Cons two-column enhancement (JS-applied wrapper) */
.pros-cons-row {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 18px;
	margin: 0 0 24px;
}
.pros-cons-row ul {
	background: var(--color-surface);
	border: 1px solid var(--color-border);
	border-radius: var(--radius-md);
	padding: 16px 16px 16px 32px;
	margin: 0;
}
@media (max-width: 620px) {
	.pros-cons-row { grid-template-columns: 1fr; }
}

/* FAQ accordion (JS-applied) */
.faq-accordion { margin: 0 0 24px; }
.faq-accordion details {
	background: var(--color-surface);
	border: 1px solid var(--color-border);
	border-left: 4px solid var(--color-primary);
	border-radius: var(--radius-sm);
	padding: 4px 16px;
	margin-bottom: 10px;
}
.faq-accordion summary {
	cursor: pointer;
	font-weight: 700;
	color: var(--color-secondary);
	padding: 12px 0;
	list-style: none;
}
.faq-accordion summary::-webkit-details-marker { display: none; }
.faq-accordion summary::after {
	content: "+";
	float: right;
	font-weight: 700;
	color: var(--color-primary);
}
.faq-accordion details[open] summary::after { content: "\2212"; }
.faq-answer { padding: 0 0 14px; color: var(--color-text-muted); }

/* Go back row on special page */
.go-back-row { text-align: center; margin: 30px 0 10px; }

/* Footer */
.site-footer {
	background: var(--color-secondary);
	color: #dfe3e9;
	margin-top: 40px;
}
.footer-inner {
	max-width: var(--maxw-wide);
	margin: 0 auto;
	padding: 26px 20px;
	text-align: center;
}
.footer-links {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 14px;
	margin-bottom: 12px;
}
.footer-links a { color: #dfe3e9; font-size: 0.88rem; text-decoration: none; }
.footer-links a:hover { color: #fff; text-decoration: underline; }
.footer-copy { margin: 0; font-size: 0.82rem; color: #b7bfca; }

/* Back to top */
.back-to-top {
	position: fixed;
	right: 22px;
	bottom: 22px;
	width: 42px;
	height: 42px;
	border-radius: var(--radius-sm);
	background: var(--color-primary);
	color: #fff;
	border: none;
	font-size: 1.1rem;
	cursor: pointer;
	opacity: 0;
	visibility: hidden;
	transform: translateY(12px);
	transition: opacity .25s ease, transform .25s ease;
	box-shadow: var(--shadow-soft);
	z-index: 60;
}
.back-to-top.is-visible {
	opacity: 1;
	visibility: visible;
	transform: translateY(0);
}