:root {
    /* 顏色定義 */
    --primary-color: #1A3A5C;
    --primary-light: #3A7BBA;
    --secondary-color: #E8820C;
    --secondary-hover: #CC730A;
    --text-dark: #2D3748;
    --text-light: #718096;
    --bg-white: #FFFFFF;
    --bg-light: #F5F7FA;
    --white: #FFFFFF;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', 'Noto Sans TC', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-white);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

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

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

.btn-primary {
    background-color: var(--secondary-color);
    color: var(--white);
}

.btn-primary:hover {
    background-color: var(--secondary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary-light);
    color: var(--primary-light);
}

.btn-outline:hover {
    background-color: var(--primary-light);
    color: var(--white);
}

/* Navbar */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    padding: 20px 0;
}

header.scrolled {
    background-color: var(--primary-color);
    padding: 12px 0;
    box-shadow: var(--shadow);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--white);
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-links a {
    color: var(--white);
    font-weight: 500;
    font-size: 1rem;
    opacity: 0.9;
}

.nav-links a:hover {
    color: var(--secondary-color);
    opacity: 1;
}

.hamburger {
    display: none;
    cursor: pointer;
    color: var(--white);
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-info h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.footer-info p {
    margin-bottom: 15px;
    opacity: 0.8;
}

.footer-links h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-links h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 30px;
    height: 2px;
    background-color: var(--secondary-color);
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links ul li a {
    opacity: 0.7;
}

.footer-links ul li a:hover {
    opacity: 1;
    color: var(--secondary-color);
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 30px;
    text-align: center;
    font-size: 0.9rem;
    opacity: 0.6;
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hamburger {
        display: block;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-content h1 {
        font-size: 2.5rem !important;
    }
}