* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
	font-family: 'Georgia', 'Noto Serif SC';
}

body {
	background: #1a2020;
	color: #e0e0e0;
	min-height: 100vh;
	padding: 20px;
}

.container {
	max-width: 1200px;
	margin: 0 auto;
}

header {
	text-align: center;
	margin: 20px 0 40px;
	color: white;
	text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

h1 {
	font-size: 2.8rem;
	margin-bottom: 10px;
}

.subtitle {
	font-size: 1.2rem;
	opacity: 0.9;
	max-width: 600px;
	margin: 0 auto;
	line-height: 1.6;
}

a {
	color: #e8f7c9;
	text-decoration: underline solid;
	/* 默认所有链接为实线下划线 */
}

a:hover {
	color: #aaddbb;
	text-shadow: 0 0 12px rgba(170, 221, 187, 0.9);
}

.card {
	background: #2c3131;
	border-radius: 15px;
	box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
	padding: 30px;
	margin-bottom: 30px;
	transition: transform 0.3s ease;
}

.card:hover {
	transform: translateY(-5px);
}

.input-section h2,
.results-section h2 {
	color: #f3ae75;
	margin-bottom: 20px;
	display: flex;
	align-items: center;
	gap: 10px;
}

.input-section h2 i,
.results-section h2 i {
	color: #f3ae75;
}

textarea {
	color: #e0e0e0;
	background-color: #1a2020;
	width: 100%;
	height: 300px;
	padding: 15px;
	border: 2px solid #e0e0e0;
	border-radius: 10px;
	font-size: 1.1rem;
	resize: vertical;
	transition: border-color 0.3s;
	line-height: 1.6;
}

textarea:focus {
	border-color: #e8f7c9;
	outline: none;
	box-shadow: 0 0 0 3px rgba(155, 89, 182, 0.2);
}

.stats {
	display: flex;
	flex-wrap: wrap;
	gap: 15px;
	margin: 15px 0;
	background: #3c4141;
	padding: 15px;
	border-radius: 10px;
}

.stat-item {
	background: #5a6060;
	color: #e0e0e0;
	padding: 12px 20px;
	border-radius: 8px;
	font-weight: 500;
	display: flex;
	align-items: center;
	gap: 8px;
	box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.btn-container {
	display: flex;
	justify-content: center;
	margin: 20px 0;
}

.btn-analyze {
	background: #885139;
	color: white;
	border: none;
	padding: 14px 40px;
	font-size: 1.1rem;
	border-radius: 50px;
	cursor: pointer;
	transition: all 0.3s ease;
	box-shadow: 0 4px 15px rgba(136, 81, 57, 0.4);
	display: flex;
	align-items: center;
	gap: 10px;
}

.btn-analyze:hover {
	background: #f3ae75;
	transform: translateY(-2px);
	box-shadow: 0 6px 20px rgba(243, 174, 117, 0.6);
}

.btn-analyze:active {
	transform: translateY(0);
}

.results-section {
	display: none;
}

.controls {
	display: flex;
	justify-content: space-between;
	margin-bottom: 15px;
	flex-wrap: wrap;
	gap: 10px;
}

.search-box {
	padding: 10px 15px;
	border: 2px solid #e0e0e0;
	border-radius: 30px;
	width: 250px;
	font-size: 1rem;
}

.sort-buttons {
	display: flex;
	gap: 10px;
}

.sort-btn {
	background-color: #5a6060;
	color: #e0e0e0;
	border: none;
	padding: 8px 15px;
	border-radius: 20px;
	cursor: pointer;
	transition: all 0.2s;
	display: flex;
	align-items: center;
	gap: 5px;
}

.sort-btn:hover {
	background: #2d160c;
}

.sort-btn.active {
	background: #885139;
}

.chart-container {
	display: flex;
	height: 300px;
	margin: 30px 0;
	gap: 20px;
}

.bar-chart {
	flex: 1;
	display: flex;
	align-items: flex-end;
	gap: 8px;
	padding: 20px 0;
	border-bottom: 2px solid #1a2020;
}

.bar {
	flex: 1;
	background: linear-gradient(to top, #f3ae75, #f39e75);
	position: relative;
	border-radius: 5px 5px 0 0;
	transition: height 0.5s ease;
}

.bar-label {
	position: absolute;
	bottom: -25px;
	left: 0;
	right: 0;
	text-align: center;
	font-size: 14px;
	font-weight: bold;
	color: #8a9090;
}

.bar-value {
	position: absolute;
	top: -25px;
	left: 0;
	right: 0;
	text-align: center;
	font-size: 12px;
	color: #e0e0e0;
}

.results-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
	gap: 15px;
	margin-top: 20px;
}

.letter-card {
	background: #3c4141;
	border-radius: 10px;
	padding: 15px;
	text-align: center;
	box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
	transition: transform 0.3s ease;
}

.letter-card:hover {
	transform: translateY(-5px);
	background: #5a6060;
}

.letter {
	font-size: 3rem;
	font-weight: bold;
	color: #f3ae75;
	margin-bottom: 10px;
}

.letter-stats {
	font-size: 0.9rem;
}

.count {
	font-weight: bold;
	color: #e8f7c9;
}

.frequency {
	color: #7f8c8d;
}

.footer {
	text-align: center;
	color: white;
	padding: 20px;
	font-size: 0.9rem;
	opacity: 0.8;
}

.highlight {
	background-color: #885139;
	padding: 2px 5px;
	border-radius: 3px;
	font-weight: bold;
}

@media (max-width: 768px) {
	.container {
		padding: 10px;
	}

	h1 {
		font-size: 2.2rem;
	}

	.card {
		padding: 20px;
	}

	.controls {
		flex-direction: column;
	}

	.search-box {
		width: 100%;
	}

	.sort-buttons {
		width: 100%;
		justify-content: center;
	}

	.chart-container {
		flex-direction: column;
		height: auto;
	}

	.results-grid {
		grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
	}
}