:root {
    --primary-color: #006285;
    --primary-light: #E6F3F7;
    --bg-color: #F8F9FA;
    --card-bg: #FFFFFF;
    --border-color: #E5E7EB;
    --text-main: #222222;
    --text-sub: #666666;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Microsoft JhengHei", sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* 頁首：外層排版 */
header {
    background-color: #E6F3F7;
    border-bottom: 4px solid var(--primary-color);
    padding: 12px 8%;
    box-shadow: 0 2px 10px rgba(0,0,0,0.03);
}

/* 將標題與 LOGO 包裝成可點擊的超連結區塊 */
.header-brand-link {
    display: inline-flex;
    align-items: center;
    gap: 15px;
    text-decoration: none; /* 移除超連結下底線 */
    color: inherit;
    transition: opacity 0.2s ease;
}

    /* 滑鼠移過去時有微幅透明度變化，提示可點擊 */
    .header-brand-link:hover {
        opacity: 0.85;
    }

.logo-img {
    height: 65px;
    width: auto;
    object-fit: contain;
    background-color: var(--primary-light);
    border-radius: 4px;
}

.brand h1 {
    margin: 0;
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: 1px;
    line-height: 1.2;
}

.brand div {
    margin: 0 0 4px 0;
    font-size: 1.5rem;
    color: #484848;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    font-weight: 700;
}

/* 主容器 */
.container {
    flex: 1;
    max-width: 1200px;
    margin: 50px auto;
    margin-top: 0;
    padding: 0 20px;
    width: 100%;
    box-sizing: border-box;
}

.title-section {
    text-align: center;
    margin-bottom: 45px;
    margin-top: 50px;
}

    .title-section h2 {
        font-size: 1.8rem;
        font-weight: 600;
        color: #111111;
        margin: 0;
        letter-spacing: 1px;
        display: inline-block;
        border-bottom: 3px solid var(--primary-color);
        /*width: 15rem;*/
        text-align: center;
        padding: 0 15px 8px 15px;
    }

/* 頂部導覽列：超連結 a 標籤 */
.tab-nav-container {
    /*background-color: #FFFFFF;*/
    /*border-bottom: 3px solid var(--primary-color);*/
    display: flex;
    justify-content: center;
    padding:  0 8%;
    gap: 15px;
}

.tab-link {
    text-decoration: none;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-sub);
    font-size: 1.2rem;
    font-weight: 500;
    border-bottom: 4px solid transparent;
    border-left: 1px solid transparent;
    border-right: 1px solid transparent;
    transition: all 0.2s ease;
    font-weight: bold;
    background-color: #FFFFFF;
}

.tab-circle-img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--primary-light);
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

    .tab-circle-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

/* 當前頁面的高亮樣式 */
.tab-link.active {
    color: var(--primary-color);
    font-weight: bold;
    border-bottom-color: var(--primary-color);
    border-left-color: var(--primary-color);
    border-right-color: var(--primary-color);
    background-color: #FFFFFF;
}

    .tab-link.active .tab-circle-img {
        border-color: var(--primary-color);
        box-shadow: 0 2px 8px rgba(0, 98, 133, 0.2);
    }

/* 頁尾 */
footer {
    background-color: #262E33;
    color: #CCCCCC;
    padding: 25px 8%;
    font-size: 1rem;
    line-height: 1.8;
}

.footer-wrap {
    max-width: 950px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

    .footer-wrap > div > div:first-child {
        font-weight: bold;
        color: #ffffff;
    }

.badge {
    border: 1px solid #555555;
    padding: 4px 10px;
    font-size: 1rem;
    color: #999999;
    border-radius: 4px;
}

@media (max-width: 768px) {
    header {
        text-align: center;
        padding: 20px 5%;
    }

    .header-brand-link {
        flex-direction: column;
        gap: 8px;
    }

    .tab-nav-container {
        gap: 0;
        padding: 0 ;
        display: flex;
    }

    .tab-link {
        flex: 1; /* 三個按鈕等寬平分螢幕 */
        padding: 10px 4px;
        font-size: 1.2rem;
        flex-direction: column; /* 關鍵：讓圓形圖片與文字改成上下排列 */
        gap: 6px;
        text-align: center;
    }

    .tab-circle-img {
        width: 28px; /* 手機板稍微縮小圓圈，更精緻 */
        height: 28px;
    }

    .footer-wrap {
        flex-direction: column;
        text-align: center;
    }
}