/* 修正 header 溢出問題 */
body {
    overflow-x: hidden; /* 防止水平滾動 */
    width: 100%;
}

.header {
    background: white;
    padding: 0.8rem 0; /* 改用上下內邊距 */
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    box-sizing: border-box;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    box-sizing: border-box;
}

.logo {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 1.4rem;
    font-weight: bold;
    transition: color 0.3s;
}

.logo:hover {
    color: var(--secondary-color);
}

.nav-buttons {
    display: flex;
    align-items: center;
    gap: 1.8rem;
}

.nav-button {
    color: #444;
    text-decoration: none;
    padding: 0.7rem 1.4rem;
    transition: all 0.3s ease;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
}

.nav-button.secondary {
    background: #f8f9fa;
    border: 1px solid #eee;
}

.nav-button.secondary:hover {
    color: var(--primary-color);
    background: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    border-color: #e0e0e0;
}

.nav-button.contact {
    background: var(--secondary-color);
    color: white;
    padding: 0.7rem 1.6rem;
    gap: 0.6rem;
    border: none;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.2);
}

.nav-button.contact:hover {
    background: #2980b9;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.3);
}

.nav-button.contact i {
    font-size: 1.1rem;
    margin: 0;
}

/* 響應式設計 */
@media (max-width: 768px) {
    .header {
        padding: 0.8rem 0;
    }
    
    .header-container {
        padding: 0 1rem;
    }

    .logo {
        font-size: 1.1rem;
    }

    .nav-buttons {
        gap: 0.5rem;
    }
    
    .nav-button {
        padding: 0.5rem 0.8rem;
        font-size: 0.9rem;
    }

    .nav-button.contact {
        width: 36px;
        height: 36px;
        padding: 0;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .nav-button.contact span {
        display: none;
    }

    .nav-button.contact i {
        margin: 0;
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 0.6rem 0.8rem;
    }

    .logo {
        font-size: 1rem;
    }

    .nav-buttons {
        gap: 0.3rem;
    }

    .nav-button {
        padding: 0.4rem 0.6rem;
        font-size: 0.85rem;
    }

    .nav-button.contact {
        width: 32px;
        height: 32px;
    }
}