/* ============================================
   youpin - 简约单页品牌宣传模板
   ============================================ */

/* ---------- CSS Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
	font-size: 15px;
	line-height: 1.8;
	color: #333;
	background: #fff;
	-webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s; }
a:hover { color: #2563EB; }
ul, ol { list-style: none; }

/* ---------- 变量 ---------- */
:root {
	--primary: #2563EB;
	--primary-dark: #1D4ED8;
	--text: #1f2937;
	--text-light: #6b7280;
	--bg: #ffffff;
	--bg-soft: #f9fafb;
	--border: #e5e7eb;
	--container: 1200px;
	--radius: 8px;
}

/* ---------- 容器 ---------- */
.container {
	max-width: var(--container);
	margin: 0 auto;
	padding: 0 24px;
}

/* ---------- 导航 ---------- */
.site-header {
	position: sticky;
	top: 0;
	z-index: 100;
	background: rgba(255,255,255,.95);
	backdrop-filter: blur(8px);
	border-bottom: 1px solid var(--border);
}
.header-inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	height: 64px;
}
.site-logo {
	font-size: 18px;
	font-weight: 700;
	color: var(--text);
	display: flex;
	align-items: center;
	gap: 8px;
}
.site-logo img { height: 36px; }
.main-nav {
	display: flex;
	gap: 32px;
}
.main-nav .nav-link {
	font-size: 15px;
	color: var(--text);
	font-weight: 500;
	position: relative;
}
.main-nav .nav-link:hover,
.main-nav .nav-link.active { color: var(--primary); }
.main-nav .nav-link.active::after {
	content: '';
	position: absolute;
	left: 0; bottom: -22px;
	width: 100%; height: 2px;
	background: var(--primary);
}
.mobile-menu-btn {
	display: none;
	flex-direction: column;
	gap: 5px;
	background: none;
	border: none;
	cursor: pointer;
	padding: 4px;
}
.mobile-menu-btn span {
	display: block;
	width: 24px;
	height: 2px;
	background: var(--text);
	border-radius: 2px;
}
.mobile-menu {
	display: none;
	flex-direction: column;
	padding: 16px 24px;
	border-top: 1px solid var(--border);
	background: #fff;
}
.mobile-menu.active { display: flex; }
.mobile-menu .nav-link {
	padding: 12px 0;
	border-bottom: 1px solid var(--border);
	font-size: 15px;
}

/* ---------- Hero 区块 ---------- */
.hero {
	padding: 96px 0 80px;
	text-align: center;
	background: linear-gradient(180deg, #f8faff 0%, #ffffff 100%);
}
.hero h1 {
	font-size: 48px;
	font-weight: 700;
	color: var(--text);
	margin-bottom: 16px;
	letter-spacing: -0.5px;
}
.hero p {
	font-size: 18px;
	color: var(--text-light);
	margin-bottom: 32px;
}
.hero .btn {
	display: inline-block;
	padding: 14px 36px;
	background: var(--primary);
	color: #fff;
	border-radius: var(--radius);
	font-size: 16px;
	font-weight: 500;
	transition: background .2s, transform .15s;
}
.hero .btn:hover { background: var(--primary-dark); transform: translateY(-1px); color: #fff; }
.hero .btn-outline {
	background: transparent;
	color: var(--primary);
	border: 1px solid var(--primary);
	margin-left: 12px;
}
.hero .btn-outline:hover { background: var(--primary); color: #fff; }

/* ---------- 通用 Section ---------- */
.section {
	padding: 80px 0;
}
.section-header {
	text-align: center;
	margin-bottom: 48px;
}
.section-title {
	font-size: 32px;
	font-weight: 700;
	color: var(--text);
	margin-bottom: 8px;
}
.section-subtitle {
	font-size: 15px;
	color: var(--text-light);
}
.section-alt { background: var(--bg-soft); }

/* ---------- 卡片网格 ---------- */
.grid {
	display: grid;
	gap: 24px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
	background: #fff;
	border: 1px solid var(--border);
	border-radius: var(--radius);
	padding: 32px;
	transition: box-shadow .2s, transform .15s;
}
.card:hover {
	box-shadow: 0 8px 24px rgba(0,0,0,.06);
	transform: translateY(-2px);
}
.card h3 {
	font-size: 18px;
	font-weight: 600;
	margin-bottom: 12px;
	color: var(--text);
}
.card h3 a { color: inherit; }
.card h3 a:hover { color: var(--primary); }
.card p { color: var(--text-light); font-size: 14px; }
.card :is(span, div, p) {
	white-space: normal !important;
	word-break: break-word;
	overflow-wrap: break-word;
}
.card-icon {
	font-size: 32px;
	margin-bottom: 16px;
}

/* ---------- 按钮 ---------- */
.btn {
	display: inline-block;
	padding: 10px 28px;
	background: var(--primary);
	color: #fff;
	border-radius: var(--radius);
	font-size: 14px;
	font-weight: 500;
	transition: background .2s, transform .15s;
	border: none;
	cursor: pointer;
}
.btn:hover { background: var(--primary-dark); transform: translateY(-1px); color: #fff; }
.btn-outline {
	background: transparent;
	color: var(--primary);
	border: 1px solid var(--primary);
}
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-white { background: #fff; color: var(--primary); }
.btn-lg { padding: 16px 48px; font-size: 16px; }

/* ---------- 页面标题 ---------- */
.page-header {
	padding: 64px 0 48px;
	text-align: center;
	background: var(--bg-soft);
	border-bottom: 1px solid var(--border);
}
.page-header h1 {
	font-size: 36px;
	font-weight: 700;
	color: var(--text);
	margin-bottom: 8px;
}
.page-header p {
	font-size: 15px;
	color: var(--text-light);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
	padding: 16px 0;
	font-size: 14px;
	color: var(--text-light);
	border-bottom: 1px solid var(--border);
}
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .separator { margin: 0 8px; color: #d1d5db; }
.breadcrumb .current { color: var(--text); }

/* ---------- 内容区块 ---------- */
.page-content { padding: 64px 0; }
.page-content .card {
	max-width: 900px;
	margin: 0 auto;
	padding: 48px;
}
.page-content .card h2 {
	font-size: 24px;
	font-weight: 700;
	margin-bottom: 24px;
	color: var(--text);
}
.page-content .card img {
	max-width: 100%;
	height: auto;
	border-radius: var(--radius);
	margin: 16px 0;
}
.page-content .card p {
	margin-bottom: 16px;
	color: var(--text);
	font-size: 15px;
}
.page-content .card :is(span, div, p) {
	white-space: normal !important;
	word-break: break-word;
	overflow-wrap: break-word;
}
.page-content .card a { color: var(--primary); }
.page-content .card a:hover { text-decoration: underline; }

/* ---------- 列表页 ---------- */
.list-card {
	display: flex;
	gap: 24px;
	padding: 24px 0;
	border-bottom: 1px solid var(--border);
}
.list-card:last-child { border-bottom: none; }
.list-card .thumb {
	width: 220px;
	flex-shrink: 0;
	border-radius: var(--radius);
	overflow: hidden;
	background: var(--bg-soft);
}
.list-card .thumb img {
	width: 100%;
	height: 140px;
	object-fit: cover;
}
.list-card .info { flex: 1; }
.list-card .info h3 {
	font-size: 18px;
	font-weight: 600;
	margin-bottom: 8px;
}
.list-card .info h3 a { color: var(--text); }
.list-card .info h3 a:hover { color: var(--primary); }
.list-card .info .meta {
	font-size: 13px;
	color: var(--text-light);
	margin-bottom: 8px;
}
.list-card .info .desc {
	font-size: 14px;
	color: var(--text-light);
	line-height: 1.6;
}

/* ---------- 分页 ---------- */
.pagination {
	display: flex;
	justify-content: center;
	gap: 8px;
	padding: 32px 0;
}
.pagination a, .pagination span {
	display: inline-block;
	min-width: 36px;
	height: 36px;
	line-height: 36px;
	padding: 0 12px;
	border: 1px solid var(--border);
	border-radius: 6px;
	font-size: 14px;
	color: var(--text);
	text-align: center;
}
.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination .current {
	background: var(--primary);
	color: #fff;
	border-color: var(--primary);
}

/* ---------- 留言表单 ---------- */
.form-group { margin-bottom: 20px; }
.form-group label {
	display: block;
	font-size: 14px;
	font-weight: 500;
	color: var(--text);
	margin-bottom: 8px;
}
.form-control {
	width: 100%;
	padding: 12px 16px;
	font-size: 14px;
	border: 1px solid var(--border);
	border-radius: var(--radius);
	background: #fff;
	transition: border-color .2s;
	outline: none;
	font-family: inherit;
}
.form-control:focus { border-color: var(--primary); }
textarea.form-control { resize: vertical; min-height: 120px; }

/* ---------- 搜索 ---------- */
.search-box {
	display: flex;
	gap: 8px;
	max-width: 480px;
	margin: 0 auto;
}
.search-box .form-control { flex: 1; }

/* ---------- 底部 ---------- */
.site-footer {
	background: #111827;
	color: #d1d5db;
	padding: 64px 0 0;
	margin-top: 80px;
}
.footer-grid {
	display: grid;
	grid-template-columns: 2fr 1fr 1.5fr;
	gap: 48px;
	padding-bottom: 48px;
}
.footer-col h4 {
	color: #fff;
	font-size: 16px;
	font-weight: 600;
	margin-bottom: 16px;
}
.footer-col a {
	display: block;
	font-size: 14px;
	color: #9ca3af;
	padding: 4px 0;
}
.footer-col a:hover { color: #fff; }
.footer-col p {
	font-size: 14px;
	color: #9ca3af;
	line-height: 1.8;
}
.footer-desc { margin-top: 8px; }
.footer-bottom {
	border-top: 1px solid #374151;
	padding: 20px 0;
	text-align: center;
	font-size: 13px;
	color: #6b7280;
}
.footer-bottom a { color: #9ca3af; }
.footer-bottom a:hover { color: #fff; }

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
	.header-inner { height: 56px; }
	.main-nav { display: none; }
	.mobile-menu-btn { display: flex; }
	.hero { padding: 64px 0 48px; }
	.hero h1 { font-size: 32px; }
	.hero p { font-size: 16px; }
	.section { padding: 48px 0; }
	.section-title { font-size: 24px; }
	.grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
	.footer-grid { grid-template-columns: 1fr; gap: 32px; }
	.list-card { flex-direction: column; }
	.list-card .thumb { width: 100%; }
	.list-card .thumb img { height: 180px; }
	.page-content .card { padding: 24px; }
	.page-header { padding: 40px 0 32px; }
	.page-header h1 { font-size: 28px; }
}
@media (min-width: 769px) and (max-width: 1024px) {
	.grid-4 { grid-template-columns: repeat(2, 1fr); }
	.footer-grid { grid-template-columns: 1fr 1fr; }
}