/* CSS Variable Definitions */
:root {
    --primary-bg: #121212;
    --secondary-bg: #1a1a1a;
    --accent-gold: #d4af37;
    --light-gold: #f1e5ac;
    --text-white: #ffffff;
    --text-gray: #a0a0a0;
    --gold-gradient: linear-gradient(135deg, #d4af37 0%, #f1e5ac 100%);
    --card-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

html {
    scroll-behavior: smooth;
    background-color: var(--primary-bg);
}

body {
    color: var(--text-white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Scroll Animation Helper */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition);
}

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

/* Header & Nav */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(18, 18, 18, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(212, 175, 55, 0.2);
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-gold);
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo span {
    color: var(--text-white);
    margin-left: 5px;
    font-size: 0.9rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-white);
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--accent-gold);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: radial-gradient(circle at center, #1a1a1a 0%, #000000 100%);
    padding-top: 80px;
}

.hero-content h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    background: var(--gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-gray);
    max-width: 800px;
    margin: 0 auto 2.5rem;
}

.btn {
    display: inline-block;
    padding: 12px 35px;
    background: var(--gold-gradient);
    color: #000;
    text-decoration: none;
    border-radius: 4px;
    font-weight: bold;
    transition: var(--transition);
    border: none;
}

.btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(212, 175, 55, 0.4);
}

/* Footer Control */
footer {
    background: #0a0a0a;
    padding: 5rem 0 2rem;
    border-top: 1px solid rgba(212, 175, 55, 0.1);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
}

.footer-info h3 {
    color: var(--accent-gold);
    margin-bottom: 1.5rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--text-gray);
    text-decoration: none;
}

.footer-bottom {
    text-align: center;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-gray);
    font-size: 0.8rem;
}

/* Sections */
section {
    padding: 100px 0;
}

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

.section-title {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--accent-gold);
    margin-bottom: 1rem;
}

.section-title .divider {
    width: 60px;
    height: 3px;
    background: var(--accent-gold);
    margin: 0 auto;
}

/* Grid Components */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* In a real app we'd have a mobile menu */
    }
    .hero-content h1 {
        font-size: 2.5rem;
    }
}