/* Panda Sports - Black Gold Theme */
:root {
    --gold: #d4af37;
    --gold-hover: #c5a028;
    --bg-dark: #121212;
    --bg-card: #1a1a1a;
    --text-gray: #9ca3af;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: #fff;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: #0d0d0d;
}
::-webkit-scrollbar-thumb {
    background: var(--gold);
    border-radius: 10px;
}

/* Utilities */
.text-gold { color: var(--gold); }
.bg-gold { background-color: var(--gold); }
.border-gold { border-color: var(--gold); }

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s ease;
    padding: 20px 0;
}
nav.scrolled {
    background: rgba(18, 18, 18, 0.95);
    backdrop-filter: blur(10px);
    padding: 10px 0;
    border-bottom: 1px solid rgba(212, 175, 55, 0.2);
}

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

.logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 900;
    text-decoration: none;
    color: #fff;
}
.logo span { color: var(--gold); margin-left: 5px; }

.nav-links {
    display: flex;
    gap: 30px;
}
.nav-links a {
    color: var(--text-gray);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s;
}
.nav-links a:hover, .nav-links a.active {
    color: var(--gold);
}

/* Hero */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(to right, rgba(18, 18, 18, 1) 30%, rgba(18, 18, 18, 0.5)), url('https://tse-mm.bing.com/th?q=健身房背景');
    background-size: cover;
    background-position: center;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

.hero h1 {
    font-size: 72px;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 20px;
}
.hero p {
    font-size: 18px;
    color: var(--text-gray);
    max-width: 600px;
    margin-bottom: 40px;
}

.btn {
    padding: 15px 35px;
    border-radius: 50px;
    font-weight: 700;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}
.btn-gold {
    background: var(--gold);
    color: #000;
}
.btn-gold:hover {
    background: var(--gold-hover);
    transform: translateY(-3px);
}

/* Sections */
section {
    padding: 100px 0;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-title {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 50px;
    text-align: center;
}
.section-title span { color: var(--gold); }

/* Cards */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.card {
    background: var(--bg-card);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform 0.3s;
}
.card:hover {
    transform: translateY(-10px);
}
.card-img {
    height: 200px;
    width: 100%;
    object-fit: cover;
}
.card-body {
    padding: 25px;
}

/* Products Page */
.filter-bar {
    background: var(--bg-card);
    padding: 30px;
    border-radius: 20px;
    margin-bottom: 50px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
}
.filter-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.filter-group label {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-gray);
    text-transform: uppercase;
}
select, input {
    background: #0d0d0d;
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
    padding: 12px 20px;
    border-radius: 10px;
    outline: none;
}

/* About Us */
.history-item {
    display: flex;
    gap: 40px;
    margin-bottom: 50px;
    position: relative;
}
.history-year {
    font-size: 24px;
    font-weight: 900;
    color: var(--gold);
    min-width: 80px;
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}
.contact-form input, .contact-form textarea {
    width: 100%;
    margin-bottom: 20px;
}

/* Footer */
footer {
    background: #0a0a0a;
    padding: 80px 0 30px;
    border-top: 1px solid rgba(212, 175, 55, 0.1);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 48px; }
    .contact-grid { grid-template-columns: 1fr; }
    .nav-links { display: none; }
}

/* Animations */
.fade-in {
    animation: fadeIn 1s ease forwards;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}