:root {
    --steel-silver: #C0C0C0;
    --motion-gold: #D4AF37;
    --graphite-black: #1C1C1C;
    --deep-black: #0D0D0D;
    --smart-blue: #0056B3;
    --text-white: #F5F5F5;
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Inter', 'Noto Sans TC', sans-serif;
}

body {
    background-color: var(--graphite-black);
    color: var(--text-white);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, .serif-font {
    font-family: var(--font-serif);
    font-weight: 700;
}

.text-gold { color: var(--motion-gold); }
.bg-gold { background-color: var(--motion-gold); }
.border-gold { border-color: var(--motion-gold) !important; }

/* Navbar Styling */
.navbar {
    background-color: rgba(13, 13, 13, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(192, 192, 192, 0.1);
    padding: 1.5rem 0;
    z-index: 1000;
}

.navbar-brand {
    font-family: var(--font-serif);
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--motion-gold) !important;
}

.nav-link {
    color: var(--steel-silver) !important;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-left: 1.5rem;
    transition: color 0.3s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--motion-gold) !important;
}

/* Hero Section Base */
.hero-section {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(180deg, var(--deep-black) 0%, var(--graphite-black) 100%);
}

/* Footer */
footer {
    background-color: var(--deep-black);
    padding: 4rem 0 2rem;
    border-top: 1px solid rgba(212, 175, 55, 0.2);
}

.footer-logo {
    font-family: var(--font-serif);
    color: var(--motion-gold);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* Custom Components */
.card-vt {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(192, 192, 192, 0.1);
    border-radius: 0;
    transition: all 0.4s ease;
    height: 100%;
}

.card-vt:hover {
    border-color: var(--motion-gold);
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.05);
}

.btn-gold {
    background: transparent;
    border: 1px solid var(--motion-gold);
    color: var(--motion-gold);
    border-radius: 0;
    padding: 0.8rem 2rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.3s ease;
}

.btn-gold:hover {
    background: var(--motion-gold);
    color: var(--deep-black);
}

/* Animations */
@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-up {
    animation: slideUp 1s ease forwards;
}

/* 3D Elevator Shaft Visualization */
#elevator-shaft {
    position: absolute;
    right: 10%;
    width: 200px;
    height: 80%;
    border: 2px solid rgba(192, 192, 192, 0.2);
    background: rgba(255, 255, 255, 0.02);
}

.elevator-car {
    position: absolute;
    width: 100%;
    height: 40px;
    background: var(--motion-gold);
    box-shadow: 0 0 20px var(--motion-gold);
    transition: top 2s cubic-bezier(0.45, 0, 0.55, 1);
}