/* ============================================================
   模拟启动俱乐部 · simcity
   页面风格继承自 Celeslime.github.io：蓝白清新 + 深浅色主题
   ============================================================ */

/* ---------- 变量（主色取自 Cele 头像 flower #4696d2） ---------- */
:root{
	--blue: #4696d2;
	--blue-dark: #2c6f9e;
	--blue-deep: #1f5b8a;
	--blue-light: #eaf4fb;
	--blue-soft: #f4f9fd;

	--bg: #f7fafc;
	--card: #ffffff;
	--border: #d6e8f5;
	--text: #3d5a73;
	--text-strong: #1f3a52;
	--shadow-out: 0 3px 12px rgba(70, 150, 210, 0.12);
	--shadow-hover: 0 10px 24px rgba(70, 150, 210, 0.2);
	--nav-bg: rgba(247, 250, 252, 0.82);
}

html.dark{
	--blue: #63aadd;
	--blue-dark: #7db9e4;
	--blue-deep: #9cc7e8;
	--blue-light: #1d3346;
	--blue-soft: #16242f;

	--bg: #0e1a26;
	--card: #16242f;
	--border: #244055;
	--text: #a8c1d6;
	--text-strong: #d7e6f2;
	--shadow-out: 0 3px 14px rgba(0, 0, 0, 0.5);
	--shadow-hover: 0 10px 26px rgba(0, 0, 0, 0.6);
	--nav-bg: rgba(14, 26, 38, 0.82);
}

*{
	box-sizing: border-box;
}

html{
	background: var(--bg);
}

body{
	margin: 0;
	font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
	color: var(--text);
	min-height: 100vh;
	background: var(--bg);
}

a{
	color: inherit;
	text-decoration: none;
}

:focus{
	outline: 2px solid var(--blue);
	outline-offset: 2px;
}

.container{
	width: 100%;
	max-width: 900px;
	margin: 0 auto;
	padding: 0 20px;
}

/* ---------- 顶部导航（sticky，毛玻璃） ---------- */
nav{
	position: sticky;
	top: 0;
	z-index: 50;
	display: flex;
	align-items: center;
	justify-content: space-between;
	height: 56px;
	padding: 0 max(20px, calc((100vw - 900px) / 2));
	background: var(--nav-bg);
	backdrop-filter: blur(10px);
	-webkit-backdrop-filter: blur(10px);
	border-bottom: 1px solid var(--border);
}

.nav-logo{
	display: flex;
	align-items: center;
	gap: 8px;
	font-weight: 700;
	font-size: 1.05rem;
	color: var(--blue-deep);
}

.nav-logo img{
	height: 26px;
	width: 26px;
	border-radius: 50%;
	background: #fff;
	padding: 2px;
	border: 1px solid var(--border);
}

html.dark .nav-logo img{
	background: var(--card);
}

.nav-links{
	display: flex;
	align-items: center;
	gap: 22px;
	list-style: none;
	margin: 0;
	padding: 0;
}

.nav-links li{
	display: inline-flex;
}

.nav-links a{
	font-size: 0.92rem;
	color: var(--text);
	font-weight: 500;
	transition: color 0.18s ease;
}

.nav-links a:hover{
	color: var(--blue);
}

/* ---------- 主题切换按钮 ---------- */
.nav-theme-btn{
	display: flex;
	align-items: center;
	justify-content: center;
	width: 34px;
	height: 34px;
	padding: 0;
	border: 1px solid var(--border);
	border-radius: 50%;
	background: var(--card);
	color: var(--blue-dark);
	cursor: pointer;
	transition: background 0.18s ease, transform 0.18s ease, color 0.18s ease;
	margin-left: 2px;
}

.nav-theme-btn:hover{
	background: var(--blue-light);
	color: var(--blue-deep);
	transform: translateY(-2px);
}

.theme-icon{
	width: 17px;
	height: 17px;
	display: none;
}

html:not(.dark) .theme-sun{ display: block; }
html.dark .theme-moon{ display: block; }

/* ---------- 顶部欢迎区（浅蓝白清爽风） ---------- */
header{
	background: linear-gradient(180deg, rgba(236, 247, 255, 0.85), rgba(247, 250, 252, 0.7));
	padding: 72px 20px 0px;
	text-align: center;
}

html.dark header{
	background: linear-gradient(180deg, rgba(20, 34, 47, 0.85), rgba(14, 26, 38, 0.7));
}

header h1{
	margin: 0;
	color: var(--blue-deep);
	font-size: 2rem;
	letter-spacing: 1px;
	line-height: 1.3;
}

header h1 span{
	display: block;
	margin-top: 10px;
	color: var(--blue-dark);
	font-size: 1.1rem;
	letter-spacing: 2px;
}

/* ---------- 内容卡片 ---------- */
main{
	display: block;
	padding: 32px 0 8px;
}

.section{
	background: var(--card);
	border: 1px solid var(--border);
	border-radius: 16px;
	box-shadow: var(--shadow-out);
	max-width: 800px;
	margin: 0 auto 24px;
	padding: 24px 0 4px;
	scroll-margin-top: 72px;
	transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.section:hover{
	border-color: var(--blue);
	box-shadow: var(--shadow-hover);
}

.section h2{
	margin: 0 0 18px;
	font-size: 1.3rem;
	color: var(--blue-deep);
	display: flex;
	align-items: baseline;
	gap: 10px;
	letter-spacing: 1px;
	border-bottom: 1px solid var(--border);
	padding-bottom: 12px;
}

.section h2 span{
	font-size: 0.8rem;
	font-weight: 400;
	letter-spacing: 0;
	opacity: 0.7;
	color: var(--text);
}

.section h3{
	margin: 0 0 12px;
	font-size: 1.05rem;
	color: var(--text-strong);
	display: flex;
	align-items: center;
	gap: 8px;
}

.section h3 i{
	margin-right: 2px;
	color: var(--blue-dark);
}

/* ---------- 图标列表 ---------- */
.section ul{
	list-style: none;
	padding: 0;
	margin: 0 0 16px;
}

.section ul li{
	margin: 8px 0;
	display: flex;
	align-items: center;
}

.section ul li i{
	margin-right: 10px;
	font-size: 1.05rem;
	color: var(--blue);
}

.section ul li a{
	color: var(--text);
	font-weight: 500;
	transition: color 0.18s ease;
}

.section ul li a:hover{
	color: var(--blue);
}

/* ---------- 核心资源双列 ---------- */
.resource-group{
	display: flex;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 16px;
}

.resource-item{
	flex: 1 1 260px;
}

/* ---------- 新功能描述 ---------- */
.section div > div > p{
	margin: 0 0 18px;
	font-size: 0.92rem;
	color: var(--text);
	line-height: 1.6;
	opacity: 0.85;
}

/* ---------- 页脚 ---------- */
footer{
	margin: 8px 0 36px;
	text-align: center;
	color: var(--text);
	opacity: 0.75;
	font-size: 0.9rem;
}

footer p{
	margin: 0;
}

/* ---------- 活动日历板块：暂隐藏（保留代码，需要时删除此块即可恢复） ---------- */
#resources .container > h3{
	display: none;
}
#calendar-container{
	display: none;
}

/* ---------- 日历 ---------- */
#calendar-container{
	margin: 18px 0 22px;
	border: 1px solid var(--border);
	border-radius: 12px;
	overflow: hidden;
	box-shadow: var(--shadow-out);
	background: var(--card);
}

#weekdays{
	display: flex;
	justify-content: space-between;
	align-items: center;
	border-bottom: none !important;
}

#weekdays div{
	display: inline-flex;
	justify-content: center;
	align-items: center;
	padding: 10px;
	width: 100%;
	border-bottom: none !important;
	color: var(--text);
	text-align: center;
	font-weight: 600;
}

#weekdays div:first-child,
#weekdays div:last-child{
	color: var(--blue-dark);
}

div.today{
	background-color: var(--blue) !important;
	color: #fff !important;
}

#days{
	position: relative;
	display: flex;
	flex-wrap: wrap;
	align-items: center;
}

#days > div{
	display: inline-flex;
	justify-content: flex-end;
	height: 120px;
	width: calc(100% / 7);
	font-size: 8px;
	color: var(--text);
	text-align: center;
	padding: 3px;
	position: relative;
}

#days div, #weekdays > div, #days, #weekdays{
	border: solid 0.5px var(--border);
	box-sizing: border-box;
}

#days > div > a{
	position: absolute;
	display: flex;
	white-space: nowrap;
	overflow: hidden;
	left: 0;
	top: 20px;
	width: 100%;
	line-height: 10px;
	font-size: 8px;
	align-items: center;
	justify-content: center;
	height: 13px;
	color: #fff;
	transition: 0.3s;
}

#days > div > a:hover{
	transform: scale(1.1);
	filter: brightness(1.1);
	box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
	z-index: 9;
}

#days > div > a.start{
	border-radius: 5px 0 0 5px;
}

#days > div > a.end{
	border-radius: 0 5px 5px 0;
}

#days > div > a{
	background-color: #bababa;
}

#days .act1{
	background-color: #4ab866;
}

#days .act2{
	background-color: #4489b7;
}

#days .act3{
	background-color: #e0604d;
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px){
	nav{
		padding: 0 14px;
	}
	.nav-links{
		gap: 14px;
	}
	header{
		padding: 52px 16px 40px;
	}
	header h1{
		font-size: 1.5rem;
	}
	.section{
		padding: 20px 0 2px;
		border-radius: 12px;
	}
}

@media (max-width: 480px){
	.nav-logo span{
		display: none;
	}
	.container{
		padding: 0 14px;
	}
	.resource-group{
		flex-direction: column;
	}
}