/**
 * ShawsEdu Theme - 自定义样式
 *
 * 这个文件包含所有自定义 CSS 样式
 */

:root {
	--shawsedu-brand-ink: #1d252c;
	--shawsedu-brand-accent: #ed2b2f;
	--shawsedu-accent-light: #fcebec;
	--shawsedu-accent-dark: #b91f2b;
	--shawsedu-support-blue: #29a9e1;
	--shawsedu-support-blue-light: #29a9e126;
	--shawsedu-support-blue-dark: #0f7fb1;
	--shawsedu-text-muted: #707070;
	--shawsedu-text-strong: #404040;
	--shawsedu-ink-strong: #1a1c1b;
	--shawsedu-surface-sky: #f5f8ff;
	--shawsedu-surface-warm: #f4f4f2;
	--shawsedu-surface-card: #f4f6f7;
	--shawsedu-white: #ffffff;
	--shawsedu-white-85: rgba(255, 255, 255, 0.85);
	--shawsedu-white-95: rgba(255, 255, 255, 0.95);
	--shawsedu-shadow-soft: 0 2px 10px rgba(29, 37, 44, 0.1);
	--shawsedu-shadow-card: 0 10px 30px rgba(29, 37, 44, 0.15);
	--shawsedu-transition: all 0.3s ease;
}

body {
	color: var(--shawsedu-text-muted);
	background: var(--shawsedu-white);
}

/* ============================================
   透明头部 + 滚动效果
   ============================================ */
.site-header {
	transition: var(--shawsedu-transition);
}

.site-header.scrolled {
	backdrop-filter: blur(10px);
	background: var(--shawsedu-white-95);
	box-shadow: var(--shawsedu-shadow-soft);
}

/* ============================================
   项目卡片样式
   ============================================ */
.project-card {
	transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
	border-color: rgba(29, 37, 44, 0.08);
}

.project-card:hover {
	transform: translateY(-5px);
	box-shadow: var(--shawsedu-shadow-card);
}

/* ============================================
   信息卡片样式
   ============================================ */
.info-card {
	border-radius: 8px;
	padding: 20px;
	background: var(--shawsedu-surface-card);
	box-shadow: var(--shawsedu-shadow-soft);
}

/* ============================================
   返回顶部按钮
   ============================================ */
.back-to-top {
	position: fixed;
	bottom: 30px;
	right: 30px;
	width: 50px;
	height: 50px;
	background: var(--shawsedu-brand-ink);
	color: var(--shawsedu-white);
	border-radius: 50%;
	display: none;
	align-items: center;
	justify-content: center;
	cursor: pointer;
	transition: var(--shawsedu-transition);
	z-index: 999;
}

.back-to-top:hover {
	background: var(--shawsedu-accent-dark);
	transform: translateY(-3px);
}

.back-to-top.show {
	display: flex;
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 768px) {
	.site-header {
		padding: 15px 0;
	}
	
	.back-to-top {
		width: 45px;
		height: 45px;
		bottom: 20px;
		right: 20px;
	}
}