* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
	font-family: "宋体", "仿宋", sans-serif;
}

body {
	width: 100%;
	height: 100vh;
	background-color: #f5f5f5;
	position: relative;
	overflow: hidden;
	color:#923903;
}
.responsive-img {
    height: 130px; /* 或任意高度 */
    object-fit: cover; /* 或 contain, fill, scale-down */
    object-position: center;
  }
.page {
	width: 100%;
	height: 100%;
	position: absolute;
	top: 0;
	left: 0;
	display: none !important;
	padding: 100px;
	background-color: white;
}

.active {
	display: block !important;
}


/* 封面页样式 */
#cover-page {
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	background: url('../images/p1.png') no-repeat center center;
	background-size: cover;
	color: white;
	width:100%;
	height:100vh;
}

/* 开始答题页样式 */
#start-page {
	display: flex;
	flex-direction: column;
	justify-content: space-around;
	align-items: center;
	background: url('../images/p2.png') no-repeat center center;
	background-size: cover;
	color: white;
	width:100%;
	height:100vh;
}

#start-page h1 {
	font-size: 120px;
	margin-bottom: 40px;
	font-weight: bold;
}

#start-page h2 {
	font-size: 80px;
	margin-bottom: 30px;
	font-weight: normal;
}

#start-page h3 {
	font-size: 60px;
	margin-bottom: 80px;
	font-weight: normal;
}

.version-section {
	display: flex;
	justify-content: center;
	gap: 100px;
	margin-top: 80px;
}

.version-box {
	width: 800px;
	height: 600px;
	background-color: rgba(255, 255, 255, 0.2);
	border-radius: 20px;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	padding: 40px;
	cursor: pointer;
	transition: all 0.3s;
}

.version-box:hover {
	transform: scale(1.05);
	background-color: rgba(255, 255, 255, 0.3);
}

.version-box h4 {
	font-size: 50px;
	margin-bottom: 30px;
}

.version-box p {
	font-size: 40px;
	text-align: center;
}

/* 选择页面样式 */
#select-page {
	background: linear-gradient(135deg, #f0f7ff 0%, #e6f0ff 100%);
}

.select-header {
	text-align: center;
	margin-bottom: 80px;
}

.select-header h1 {
	font-size: 90px;
	color: #1a5fb4;
	margin-bottom: 30px;
}

.select-header h2 {
	font-size: 60px;
	color: #333;
}

.version-select {
	display: flex;
	justify-content: space-around;
	margin-top: 120px;
}

.version-card {
	width: 49%;
	height: 100vh;
	padding: 60px 0;
	display: flex;
	flex-direction: column;
	cursor: pointer;
	transition: all 0.3s;
}
/*
.version-card:hover {
	transform: translateY(-10px);
	box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}
*/
.version-card h3 {
	font-size: 70px;
	color: #1a5fb4;
	margin-bottom: 40px;
	text-align: center;
}

.version-card h4 {
	font-size: 50px;
	color: #333;
	margin-bottom: 30px;
}

.version-card ul {
	list-style-type: none;
	margin-left: 40px;
}

.version-card li {
	font-size: 40px;
	margin-bottom: 25px;
	color: #555;
}

/* 答题页面样式 */
#quiz-page {
	background: url('../images/p3_bg.png') no-repeat center center;
	background-size: cover;
}

.quiz-class1{background: url('../images/tag_1.png') no-repeat center center; background-size: 100% 100%; display: inline-block; height: 64px; width: 460px;}
.quiz-class2{background: url('../images/tag_2.png') no-repeat center center; background-size: 100% 100%; display: inline-block; height: 64px; width: 460px;}


.quiz-header {
	margin-bottom: 60px;
	padding-bottom: 40px;
}

.quiz-header h1 {
	font-size: 80px;
	color: #1a5fb4;
	margin-bottom: 30px;
}

.quiz-header h2 {
	font-size: 70px;
    font-weight: normal;
}

.question-container {
	border-radius: 20px;
	padding: 80px;
	margin: 160px 10% 60px 10%;
	border:5px solid #923803;
}

.question-title {
	font-size: 70px;
	margin-bottom: 50px;
	line-height: 1.4;
    font-weight: bold;
}

.options-container {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 40px;
}

.option {
	font-size: 70px;
	line-height: 1.4;
	padding: 20px 0;
}

.option-letter {
	margin-right: 20px;
}

.answer-buttons {
	display: flex;
	justify-content: center;
	gap: 300px;
	margin-top: 80px;
}

.answer-btn {
	width: 200px;
	height: 200px;
	font-size: 100px;
	background-color: #9d4f1e;
	color: white;
	border: none;
	border-radius: 15px;
	cursor: pointer;
	transition: all 0.2s;
}

.answer-btn.active {
	background-color: #50270f;
	transform: scale(1.05);
}

.disabled {
	opacity: 0.6;
	cursor: not-allowed;
	box-shadow: none;
}

.feedback {
	text-align: center;
	margin-top: 60px;
	font-size: 50px;
	min-height: 80px;
}

.correct {
	color: #4CAF50;
}

.incorrect {
	color: #F44336;
}

.source-info {
	margin-top: 40px;
	font-size: 40px;
	min-height: 60px;
}

/* 结果页面样式 */
#result-page {
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	background: url('../images/p3_bg.png') no-repeat center center;
	background-size: cover;
	text-align: center;
}

.result-content {
	margin: 10% auto;
	max-width: 2500px;
}

.result-title {
	font-size: 100px;
	margin-bottom: 60px;
}

.result-score {
	font-size: 120px;
	margin-bottom: 80px;
	font-weight: bold;
}

.result-level {
	font-size: 110px;
	margin-bottom: 60px;
}

.result-message {
	font-size: 80px;
	line-height: 1.5;
}

.btn-restart {
	margin-top: 100px;
	padding: 40px 100px;
	font-size: 50px;
	background-color: #9e4e1f;
	color: white;
	border: 3px solid white;
	border-radius: 15px;
	cursor: pointer;
	transition: all 0.3s;
}

.btn-restart:hover {
	background-color: white;
	color: #1a5fb4;
}

.progress-bar {
	display:none;
	width: 100%;
	height: 20px;
	background-color: #e0e0e0;
	border-radius: 10px;
	margin-top: 40px;
	overflow: hidden;
}

.progress {
	height: 100%;
	background-color: #1a5fb4;
	width: 0%;
	transition: width 0.5s;
}

.question-counter {
	display:none;
	text-align: right;
	font-size: 40px;
	color: #777;
	margin-top: 20px;
}