@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@400;700&display=swap');

:root {
    --primary-color: #005A9C; /* 專業藍 */
    --secondary-color: #F2A900; /* 金色 */
    --whatsapp-green: #25D366;
    --text-dark: #333;
    --text-light: #f4f4f4;
    --background-color: #FFFFFF;
}

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

body {
    font-family: 'Noto Sans TC', sans-serif;
    line-height: 1.8;
    background-color: var(--background-color);
    color: var(--text-dark);
    /* 為了避免內容被底部按鈕遮擋，增加底部內邊距 */
    padding-bottom: 80px; 
}

header {
    background-color: var(--primary-color);
    color: var(--text-light);
    padding: 40px 20px;
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    margin-bottom: 10px;
    font-size: 2.5em;
}

header p {
    font-size: 1.2em;
    opacity: 0.9;
}

.content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    margin-bottom: 40px;
}

section h2 {
    color: var(--primary-color);
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 10px;
    margin-bottom: 20px;
}

section ul {
    list-style-type: none;
    padding-left: 0;
}

section ul li {
    background: url('data:image/svg+xml;charset=UTF-8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%23F2A900"><path d="M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z"/></svg>') no-repeat left center;
    background-size: 20px;
    padding-left: 30px;
    margin-bottom: 10px;
}

.whatsapp-button {
    /* --- 這是固定按鈕的關鍵 --- */
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 1000; /* 確保在最上層 */
    /* -------------------------- */
    
    background-color: var(--whatsapp-green);
    color: white;
    text-align: center;
    padding: 15px 0;
    font-size: 1.2em;
    font-weight: 700;
    text-decoration: none;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.2);
    transition: background-color 0.3s ease;
}

.whatsapp-button:hover {
    background-color: #1EBE57;
}

/* 針對小螢幕調整字體大小 */
@media (max-width: 600px) {
    header h1 {
        font-size: 2em;
    }
}