/* Reset */
* {
    margin:0; padding:0; box-sizing:border-box;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

/* Body */
body {
    background-color: #ECF0F1;
    color: #2C3E50;
    line-height: 1.6;
    padding: 20px;
}

/* Container */
.container {
    max-width: 960px;
    margin: 0 auto;
}

/* 标题 */
h2, h3 {
    color: #1F3A93;
    margin-bottom: 15px;
}

/* 表格/卡片样式 */
table {
    width: 100%;
    border-collapse: collapse;
}

table th, table td {
    padding: 12px;
    border-bottom: 1px solid #BDC3C7;
    text-align: left;
}

table th {
    background-color: #1F3A93;
    color: #ECF0F1;
    font-weight: 500;
}

/* 卡片式任务列表 */
.task-card {
    background-color: #FFFFFF;
    border-left: 4px solid #3498DB;
    padding: 16px;
    margin-bottom: 16px;
    border-radius: 6px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    transition: transform 0.2s;
}

.task-card:hover {
    transform: translateY(-2px);
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    background: linear-gradient(90deg,#3498DB,#1F3A93);
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    margin-top: 10px;
    text-decoration: none;
    text-align: center;
}

.btn:hover {
    background: linear-gradient(90deg,#1F3A93,#3498DB);
}

/* 表单 */
form label {
    display:block;
    margin-top:10px;
    font-weight:500;
}
form input, form select {
    width:100%;
    padding:10px;
    margin-top:5px;
    border:1px solid #BDC3C7;
    border-radius:4px;
}

/* 倒计时 */
.countdown {
    font-weight: bold;
    color: #E74C3C; /* 红色强调紧迫感 */
}

/* 小屏适配 */
@media(max-width:768px){
    body { padding: 10px; }
    table, th, td { font-size:14px; }
}