/* 重置默認樣式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft JhengHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}

/* 導航欄樣式 */
header {
    background-color: #333;
    padding: 1rem 0;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

nav a {
    color: white;
    text-decoration: none;
    font-size: 1.1rem;
}

nav a:hover {
    color: #ddd;
}

/* 主要內容區域 */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

section {
    margin-bottom: 3rem;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #222;
}

h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #333;
}

p {
    margin-bottom: 1rem;
}

.main-title {
    position: relative;
    display: inline-block;
    padding: 24px 48px;
    font-size: 3rem;
    font-weight: bold;
    background: #fff;
    margin: 40px auto 0 auto;
    z-index: 1;
    border-radius: 24px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
    overflow: hidden;
    color: transparent;
    background: linear-gradient(270deg, #ff0000, #ff9900, #ffee00, #33ff00, #00ffee, #0066ff, #cc00ff, #ff0000);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    animation: rainbow-text 3s linear infinite;
}

@keyframes rainbow-text {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.page-section {
    display: none;
}
.page-section.active {
    display: block;
}

#home.page-section.active {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 70vh;
}

footer {
    color: white;
    text-align: center;
    padding: 1rem 0;
    position: relative;
    bottom: 0;
    width: 100%;
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropbtn {
    cursor: pointer;
}

.dropdown-content {
    display: block;
    opacity: 0;
    visibility: hidden;
    position: absolute;
    background-color: #fff;
    min-width: 120px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.15);
    z-index: 10;
    left: 50%;
    transform: translateX(-50%) scaleY(0.8);
    border-radius: 8px;
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
    padding: 0.5rem 0;
}

.dropdown:hover .dropdown-content,
.dropdown:focus-within .dropdown-content {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) scaleY(1);
}

.dropdown-content a {
    color: #333;
    padding: 0.5rem 1.5rem;
    text-decoration: none;
    display: block;
    transition: background 0.2s;
    border-radius: 4px;
}

.dropdown-content a:hover {
    background: #f0f0f0;
}