/* --- 變量與通用設定 --- */
:root {
    --color-primary: #1a2a53; /* 深藍色/科技藍 */
    --color-accent: #ffb703; /* 琥珀金/亮黃色 */
    --color-text: #333;
    --color-light: #f4f4f9;
    --color-white: #ffffff;
    --font-family: 'Noto Sans TC', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

h1, h2, h3 {
    color: var(--color-primary);
    margin-bottom: 0.8em;
}

h1 { font-size: 2.5em; }
h2 { font-size: 2em; text-align: center; margin-bottom: 1.5em; }

/* --- 導航欄 (Header) --- */
header {
    background-color: var(--color-white);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    font-size: 1.5em;
    font-weight: 700;
    color: var(--color-primary);
}

#main-nav ul {
    list-style: none;
    display: flex;
}

#main-nav ul li a {
    text-decoration: none;
    color: var(--color-text);
    padding: 10px 15px;
    display: block;
    transition: color 0.3s;
}

#main-nav ul li a:hover {
    color: var(--color-accent);
}

/* 下拉選單 */
.dropdown {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--color-white);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
    min-width: 180px;
    padding: 5px 0;
    list-style: none;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-menu li a {
    padding: 10px 20px;
}

.menu-toggle {
    display: none; /* 預設在桌面版隱藏 */
    background: none;
    border: none;
    font-size: 1.8em;
    cursor: pointer;
    color: var(--color-primary);
}

/* --- 按鈕 (CTA) --- */
.cta-button {
    display: inline-block;
    padding: 12px 25px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 700;
    transition: background-color 0.3s, color 0.3s;
    margin: 5px;
}

.primary {
    background-color: var(--color-accent);
    color: var(--color-primary);
}

.primary:hover {
    background-color: #ffc94d;
}

.secondary {
    background-color: transparent;
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
}

.secondary:hover {
    background-color: rgba(255, 183, 3, 0.1);
}

/* --- 區塊樣式 (Sections) --- */
section {
    padding: 80px 0;
}

.alternate-bg {
    background-color: var(--color-light);
}

/* --- 主視覺區 (Hero) --- */
.hero {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 100px 0;
    min-height: 500px;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    /* 這裡可以添加背景圖片或抽象圖形 */
}

.hero h1 {
    color: var(--color-white);
    font-size: 3.5em;
    margin-bottom: 0.2em;
}

.hero p {
    font-size: 1.5em;
    margin-bottom: 1.5em;
}

/* --- 核心業務速覽 (Summary) --- */
.summary h2 {
    color: var(--color-primary);
}

.summary-cards {
    display: flex;
    gap: 30px;
    margin-top: 40px;
}

.card {
    flex: 1;
    background-color: var(--color-white);
    border: 1px solid #ddd;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
}

.card h3 {
    color: var(--color-accent);
    font-size: 1.5em;
}

/* --- 關於我們 (About) --- */
.about {
    text-align: center;
}

.team-info {
    margin-top: 30px;
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
    font-size: 1.1em;
}

.team-info p strong {
    color: var(--color-accent);
}

/* --- 頁腳 (Footer) --- */
footer {
    background-color: var(--color-primary);
    color: var(--color-light);
    padding: 30px 0;
    font-size: 0.9em;
}

footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--color-light);
    text-decoration: none;
    margin-left: 15px;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--color-accent);
}

/* --- 響應式設計 (RWD for Mobile) --- */
@media (max-width: 768px) {
    h1 { font-size: 2.2em; }
    h2 { font-size: 1.8em; }
    
    /* 導航切換 */
    #main-nav {
        display: none;
        width: 100%;
        position: absolute;
        top: 60px; /* 根據 header 高度調整 */
        left: 0;
        background-color: var(--color-white);
        box-shadow: 0 5px 5px rgba(0, 0, 0, 0.1);
    }
    
    #main-nav.active {
        display: block;
    }

    #main-nav ul {
        flex-direction: column;
        padding: 10px 0;
    }
    
    #main-nav ul li a {
        padding: 15px 20px;
        border-bottom: 1px solid #eee;
    }

    .menu-toggle {
        display: block;
    }
    
    .dropdown:hover .dropdown-menu, .dropdown-menu {
        position: static; /* 手機版不使用絕對定位 */
        box-shadow: none;
        border-left: 3px solid var(--color-accent);
        padding-left: 10px;
    }
    
    /* 內容調整 */
    .summary-cards {
        flex-direction: column;
    }

    .hero-content {
        padding: 0 20px;
    }
    
    .footer .container {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        margin-top: 15px;
    }
    
    .footer-links a {
        margin: 0 10px;
    }
}