:root {
    --primary-green: #193B28;
    --accent-gold: #B39F66;
    --text-dark: #333333;
    --text-light: #F9F9F9;
    --bg-color: #F5F5F0;
}

body {
    margin: 0;
    font-family: "Noto Serif TC", "Songti TC", serif; /* 使用襯線體營造傳統感 */
    background-color: var(--bg-color);
    color: var(--text-dark);
    line-height: 1.6;
}

/* 頂部導航欄 */
header {
    background-color: var(--primary-green);
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 60px; /* 根據 header_logo.png 調整高度 */
    vertical-align: middle;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 30px;
}

nav a {
    text-decoration: none;
    color: var(--text-light);
    font-size: 1.1rem;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--accent-gold);
}

/* Hero 區塊 (主視覺) */
.hero {
    background-color: var(--primary-green);
    color: var(--accent-gold);
    text-align: center;
    padding: 80px 20px;
    border-bottom: 5px solid var(--accent-gold);
    /* 如果有背景圖，可以取消下面這行的註解並替換路徑 */
    /* background-image: linear-gradient(rgba(25, 59, 40, 0.9), rgba(25, 59, 40, 0.9)), url('your-background.jpg'); */
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    font-weight: normal;
}

.hero p {
    font-size: 1.5rem;
    color: var(--text-light);
    letter-spacing: 2px;
}

.btn {
    display: inline-block;
    margin-top: 30px;
    padding: 12px 30px;
    background-color: var(--accent-gold);
    color: var(--primary-green);
    text-decoration: none;
    font-weight: bold;
    border-radius: 4px;
    transition: background 0.3s;
}

.btn:hover {
    background-color: #d4bc78;
}

/* 內容區塊 */
.section {
    padding: 60px 20px;
    text-align: center;
}

.section-title {
    font-size: 2rem;
    color: var(--primary-green);
    margin-bottom: 40px;
    display: inline-block;
    border-bottom: 2px solid var(--accent-gold);
    padding-bottom: 10px;
}

/* 族譜樹狀圖示範 (簡易版) */
.tree-preview {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

.tree-node {
    border: 1px solid var(--accent-gold);
    padding: 15px 25px;
    margin: 0 10px;
    background: white;
    border-radius: 5px;
    position: relative;
}

.tree-node::before {
    content: '';
    position: absolute;
    top: -20px;
    left: 50%;
    width: 1px;
    height: 20px;
    background: var(--accent-gold);
}

/* 頁尾 */
footer {
    background-color: var(--primary-green);
    color: #ccc;
    text-align: center;
    padding: 40px 20px;
    margin-top: auto;
}

footer p {
    font-size: 0.9rem;
}