/* 首页 - 参照 blog.iosru.com (Zibll / 如烟笔记风格) */
:root {
	--theme-color: #f04494;
	--theme-hover: #e03080;
	--theme-light: rgba(240, 68, 148, 0.1);
	--key-color: #333;
	--main-color: #4e5358;
	--muted-color: #777;
	--muted-2: #999;
	--body-bg: #f5f6f7;
	--main-bg: #fff;
	--border: rgba(50, 50, 50, 0.06);
	--shadow: rgba(116, 116, 116, 0.08);
	--radius: 8px;
	--max-w: 1200px;
	--header-h: 62px;
}

* {
	box-sizing: border-box;
}

.ios-home {
	margin: 0;
	padding: 0;
	font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
	font-size: 15px;
	line-height: 1.6;
	color: var(--main-color);
	background: var(--body-bg);
}

.ios-home a {
	text-decoration: none;
	transition: color 0.2s, background 0.2s, box-shadow 0.2s, transform 0.2s;
}

/* 顶栏 - 毛玻璃 */
.ios-header {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 1000;
	height: var(--header-h);
	background: rgba(255, 255, 255, 0.82);
	-webkit-backdrop-filter: blur(12px);
	backdrop-filter: blur(12px);
	border-bottom: 1px solid var(--border);
	box-shadow: 0 1px 8px var(--shadow);
}

.ios-header .ios-wrap {
	display: flex;
	align-items: center;
	justify-content: space-between;
	max-width: var(--max-w);
	height: 100%;
	margin: 0 auto;
	padding: 0 20px;
}

.ios-logo {
	display: flex;
	align-items: center;
	font-size: 17px;
	font-weight: 600;
	color: var(--key-color);
}

.ios-logo img {
	width: 36px;
	height: 36px;
	margin-right: 10px;
	border-radius: var(--radius);
	object-fit: contain;
}

.ios-nav {
	display: flex;
	align-items: center;
	list-style: none;
	margin: 0;
	padding: 0;
	gap: 4px;
}

.ios-nav a {
	display: block;
	padding: 8px 14px;
	font-size: 14px;
	color: var(--main-color);
	border-radius: var(--radius);
}

.ios-nav a:hover,
.ios-nav .active a {
	color: var(--theme-color);
	background: var(--theme-light);
}

.ios-nav-toggle {
	display: none;
	width: 40px;
	height: 40px;
	padding: 0;
	border: none;
	background: transparent;
	cursor: pointer;
}

.ios-nav-toggle span {
	display: block;
	width: 20px;
	height: 2px;
	margin: 5px auto;
	background: var(--key-color);
	border-radius: 1px;
	transition: 0.3s;
}

/* 主内容区 */
.ios-main {
	max-width: var(--max-w);
	margin: 0 auto;
	padding: calc(var(--header-h) + 24px) 20px 40px;
}

/* Banner 卡片 - 类似 header-slider */
.ios-banner {
	position: relative;
	margin-bottom: 20px;
	padding: 56px 40px;
	overflow: hidden;
	color: #fff;
	text-align: center;
	background: linear-gradient(135deg, rgba(255, 127, 175, 0.85) 0%, #f04494 40%, #43b2ff 100%);
	border-radius: var(--radius);
	box-shadow: 0 4px 20px var(--shadow);
}

.ios-banner::before {
	content: "";
	position: absolute;
	inset: 0;
	background: radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.2), transparent 50%);
	pointer-events: none;
}

.ios-banner-inner {
	position: relative;
	z-index: 1;
	max-width: 720px;
	margin: 0 auto;
}

.ios-banner-tag {
	display: inline-block;
	margin-bottom: 14px;
	padding: 4px 14px;
	font-size: 13px;
	background: rgba(255, 255, 255, 0.2);
	border-radius: 20px;
}

.ios-banner h1 {
	margin: 0 0 12px;
	font-size: 36px;
	font-weight: 700;
	line-height: 1.3;
	text-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

.ios-banner-desc {
	margin: 0 0 28px;
	font-size: 16px;
	line-height: 1.7;
	color: rgba(255, 255, 255, 0.92);
}

.ios-banner-btns {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 12px;
}

.ios-btn {
	display: inline-flex;
	align-items: center;
	padding: 10px 24px;
	font-size: 14px;
	font-weight: 500;
	border-radius: var(--radius);
}

.ios-btn i {
	margin-right: 6px;
}

.ios-btn-primary {
	color: var(--theme-color);
	background: #fff;
	box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.ios-btn-primary:hover {
	color: var(--theme-hover);
	box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
	transform: translateY(-1px);
}

.ios-btn-ghost {
	color: #fff;
	border: 1px solid rgba(255, 255, 255, 0.65);
}

.ios-btn-ghost:hover {
	background: rgba(255, 255, 255, 0.15);
	color: #fff;
}

/* 通用白卡片 */
.ios-card {
	margin-bottom: 20px;
	padding: 36px 32px;
	background: var(--main-bg);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	box-shadow: 0 2px 12px var(--shadow);
}

.ios-card-title {
	margin: 0 0 8px;
	font-size: 22px;
	font-weight: 600;
	color: var(--key-color);
	text-align: center;
}

.ios-card-sub {
	margin: 0 0 28px;
	font-size: 14px;
	color: var(--muted-2);
	text-align: center;
}

.ios-about-text {
	max-width: 860px;
	margin: 0 auto;
	font-size: 15px;
	line-height: 1.9;
	color: var(--main-color);
	text-align: justify;
}

/* 特性网格 */
.ios-feature-grid {
	display: grid;
	grid-template-columns: repeat(2, 1fr);
	gap: 16px;
}

.ios-feature-item {
	display: flex;
	padding: 22px 20px;
	background: var(--body-bg);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	transition: box-shadow 0.25s, transform 0.25s, border-color 0.25s;
}

.ios-feature-item:hover {
	background: var(--main-bg);
	border-color: rgba(240, 68, 148, 0.2);
	box-shadow: 0 6px 20px var(--shadow);
	transform: translateY(-2px);
}

.ios-feature-icon {
	flex-shrink: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	width: 48px;
	height: 48px;
	margin-right: 16px;
	font-size: 20px;
	color: var(--theme-color);
	background: var(--theme-light);
	border-radius: var(--radius);
}

.ios-feature-body h3 {
	margin: 0 0 8px;
	font-size: 16px;
	font-weight: 600;
	color: var(--key-color);
}

.ios-feature-body p {
	margin: 0;
	font-size: 13px;
	line-height: 1.7;
	color: var(--muted-color);
}

/* 友情链接 */
.ios-links {
	padding: 20px 24px;
	font-size: 14px;
	color: var(--muted-color);
	background: var(--main-bg);
	border: 1px solid var(--border);
	border-radius: var(--radius);
}

.ios-links a {
	color: var(--theme-color);
}

.ios-links a:hover {
	text-decoration: underline;
}

/* 页脚 */
.ios-footer {
	padding: 24px 20px;
	margin-top: 8px;
	font-size: 13px;
	color: var(--muted-2);
	text-align: center;
	background: var(--main-bg);
	border-top: 1px solid var(--border);
}

.ios-footer p {
	margin: 0;
}

/* 移动端导航 */
@media (max-width: 991.98px) {
	.ios-nav-toggle {
		display: block;
	}

	.ios-nav-wrap {
		position: fixed;
		top: var(--header-h);
		left: 0;
		right: 0;
		display: none;
		padding: 12px 16px 20px;
		background: rgba(255, 255, 255, 0.96);
		-webkit-backdrop-filter: blur(12px);
		backdrop-filter: blur(12px);
		border-bottom: 1px solid var(--border);
		box-shadow: 0 8px 20px var(--shadow);
	}

	.ios-nav-wrap.show {
		display: block;
	}

	.ios-nav {
		flex-direction: column;
		align-items: stretch;
	}

	.ios-nav a {
		padding: 12px 14px;
	}
}

@media (max-width: 767.98px) {
	.ios-banner {
		padding: 40px 24px;
	}

	.ios-banner h1 {
		font-size: 26px;
	}

	.ios-banner-desc {
		font-size: 14px;
	}

	.ios-card {
		padding: 28px 20px;
	}

	.ios-feature-grid {
		grid-template-columns: 1fr;
	}

	.ios-feature-item {
		flex-direction: column;
	}

	.ios-feature-icon {
		margin: 0 0 12px;
	}
}