*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:Microsoft Yahei, sans-serif;
}
body{
    background:#f5f7fa;
    padding:20px 0;
}
.container{
    max-width:800px;
    width:94%;
    margin:0 auto;
}
/* 顶部LOGO栏 */
.logo-bar{
    display:flex;
    justify-content:space-between;
    align-items:center;
    flex-wrap:wrap;
    gap:15px;
    padding-bottom:20px;
    border-bottom:1px solid #e2e8f0;
    margin-bottom:20px;
}
#siteLogo{
    height:60px;
    object-fit:contain;
}
.top-btns button{
    padding:8px 14px;
    border:none;
    border-radius:6px;
    cursor:pointer;
    font-size:14px;
    margin-left:8px;
}
#topHomeBtn{
    background:#2b5cb8;
    color:#fff;
}
#contactService{
    background:#722ed1;
    color:#fff;
}
.header{
    text-align:center;
    margin-bottom:30px;
}
.header h1{
    color:#2b5cb8;
    margin-bottom:8px;
}
.header p{
    color:#666;
}
/* 上传区域 */
.upload-box{
    background:#fff;
    padding:24px;
    border-radius:12px;
    box-shadow:0 2px 10px #e2e8f0;
    text-align:center;
    margin-bottom:20px;
}
#downloadTempBtn, .upload-label{
    display:inline-block;
    padding:10px 22px;
    border-radius:8px;
    border:none;
    font-size:15px;
    cursor:pointer;
    margin:0 8px 12px;
}
#downloadTempBtn{
    background:#27ae60;
    color:#fff;
}
.upload-label{
    background:#2b5cb8;
    color:#fff;
}
.tip{
    font-size:14px;
    color:#888;
}
.stock-info{
    text-align:center;
    padding:12px;
    background:#fff;
    border-radius:8px;
    margin-bottom:24px;
    color:#444;
}
/* 练习设置 */
.practice-setting{
    background:#fff;
    padding:24px;
    border-radius:12px;
    box-shadow:0 2px 10px #e2e8f0;
    text-align:center;
}
.practice-setting h3{
    margin-bottom:16px;
    color:#222;
}
.num-btns{
    display:flex;
    gap:10px;
    flex-wrap:wrap;
    justify-content:center;
    margin-bottom:16px;
}
.num-btn{
    padding:9px 20px;
    border:1px solid #2b5cb8;
    background:#fff;
    color:#2b5cb8;
    border-radius:6px;
    cursor:pointer;
    font-size:15px;
}
.num-btn.active{
    background:#2b5cb8;
    color:#fff;
}
.custom-num-box{
    display:flex;
    gap:10px;
    justify-content:center;
    margin:12px 0;
}
#customNumInput{
    width:180px;
    padding:9px 12px;
    border:1px solid #ddd;
    border-radius:6px;
    font-size:15px;
}
#confirmCustomNum{
    padding:9px 16px;
    background:#722ed1;
    color:#fff;
    border:none;
    border-radius:6px;
    cursor:pointer;
}
.select-tip{
    margin:10px 0 20px;
    font-size:15px;
    color:#444;
}
.start-btn{
    padding:12px 36px;
    background:#2b5cb8;
    color:#fff;
    border:none;
    border-radius:8px;
    font-size:16px;
    cursor:pointer;
}
/* 刷题面板 */
.quiz-wrap{
    background:#fff;
    padding:24px;
    border-radius:12px;
    box-shadow:0 2px 10px #e2e8f0;
    display:none;
}
.quiz-top{
    display:flex;
    justify-content:space-between;
    align-items:center;
    flex-wrap:wrap;
    gap:10px;
    margin-bottom:20px;
}
.quiz-top-btns{
    display:flex;
    gap:8px;
}
#quizHomeBtn{
    background:#2b5cb8;
    color:#fff;
    border:none;
    padding:6px 10px;
    border-radius:6px;
    cursor:pointer;
}
.timer-text{
    color:#e74c3c;
    font-weight:bold;
}
#exitQuiz{
    padding:6px 14px;
    background:#999;
    color:#fff;
    border:none;
    border-radius:6px;
    cursor:pointer;
}
.question-text{
    font-size:45px;
    line-height:2;
    color:#1a0746c5;
    font-family: 标准粗黑;
    background-color: #dbe9ecf6;
    margin-bottom:45px;
}
.opts-box{
    display:flex;
    flex-direction:column;
    gap:12px;
    margin-bottom:20px;
}
.opt-item{
    padding:12px 16px;
    border:1px solid #ddd;
    border-radius:8px;
    transition:0.2s;
}
.opt-item.right{
    border-color:#27ae60;
    background:#eafaf1;
}
.opt-item.wrong{
    border-color:#e74c3c;
    background:#fdeeee;
}
.answer-hint{
    padding:12px;
    border-radius:8px;
    margin-bottom:12px;
    display:none;
}
.hint-right{
    background:#eafaf1;
    color:#167739;
}
.hint-wrong{
    background:#fdeeee;
    color:#c41d1f;
}
/* 题目解析区域 */
.analysis-box{
    padding:14px;
    background:#f6f8fc;
    border-radius:8px;
    margin-bottom:20px;
    display:none;
}
.analysis-box h4{
    color:#2b5cb8;
    margin-bottom:6px;
}
/* 上下一题按钮行 */
.btn-row{
    display:flex;
    gap:12px;
}
.prev-btn, .next-btn{
    flex:1;
    padding:12px;
    border:none;
    border-radius:8px;
    font-size:16px;
    cursor:pointer;
}
.prev-btn{
    background:#86909c;
    color:#fff;
}
.next-btn{
    background:#2b5cb8;
    color:#fff;
}
/* 结果页面 */
.result-wrap{
    background:#fff;
    padding:24px;
    border-radius:12px;
    box-shadow:0 2px 10px #e2e8f0;
    display:none;
}
.result-wrap h2{
    text-align:center;
    margin-bottom:20px;
    color:#2b5cb8;
}
.stat-item{
    font-size:17px;
    margin:10px 0;
}
.wrong-list-title{
    font-weight:bold;
    margin:20px 0 10px;
}
.wrong-list{
    border:1px solid #eee;
    border-radius:8px;
    padding:12px;
    max-height:300px;
    overflow-y:auto;
}
.wrong-item{
    padding:8px 0;
    border-bottom:1px solid #eee;
    line-height:1.6;
}
.wrong-item:last-child{
    border-bottom:none;
}
.result-btns{
    display:flex;
    gap:12px;
    margin-top:24px;
}
.result-btns button{
    flex:1;
    padding:12px;
    border:none;
    border-radius:8px;
    font-size:15px;
    cursor:pointer;
}
#exportRecord{
    background:#27ae60;
    color:#fff;
}
#backHome{
    background:#2b5cb8;
    color:#fff;
}