/* 整體頁面 */
body{
    font-family:"Microsoft JhengHei", sans-serif;
    background-color:#f5f7fb;
    margin:0;
}

/* header */
header{
    background-color:#4a6fa5;
    color:white;
    text-align:center;
    padding:20px;
}

/* 導覽列 */
nav{
    background-color:#333;
}

nav ul{
    list-style:none;
    display:flex;
    justify-content:center;
    padding:10px;
    margin:0;
}

nav li{
    margin:0 15px;
}

/* 連結 */
nav a{
    color:white;
    text-decoration:none;
    font-weight:bold;
}

/* pseudo-class */
nav a:hover{
    color:yellow;
}

/* 區塊 */
section{
    width:80%;
    margin:30px auto;
    padding:20px;
    background:white;
    border-radius:10px;
    box-shadow:0 0 10px rgba(0,0,0,0.1);
}

/* id 選擇器 */
#basic{
    border-left:6px solid #4a6fa5;
}

#study{
    border-left:6px solid #6fbf73;
}

#test{
    border-left:6px solid #ff9f43;
}

/* 標題 */
h2{
    color:#333;
    border-bottom:2px solid #ddd;
    padding-bottom:5px;
}

/* pseudo-element */
h2::before{
    content:"★ ";
    color:#ff9f43;
}

/* class 選擇器 */
.highlight{
    color:#e63946;
    font-weight:bold;
}

/* 圖片 */
img{
    display:block;
    margin:15px auto;
    border-radius:10px;
}

/* 一般連結 */
a{
    color:#0066cc;
}

a:hover{
    text-decoration:underline;
}