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

:root {
    --bg-dark: #0a0a0a;
    --bg-card: #141414;
    --bg-section: #0f0f0f;
    --accent: #c9a227;
    --accent-light: #e6b82a;
    --text-primary: #f5f5f5;
    --text-secondary: #a0a0a0;
    --text-muted: #666;
    --border: #2a2a2a;
    --mask-color: #0a0a0a;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 24px;
    color: var(--accent);
}

.logo-text {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text-primary);
}

.nav {
    display: flex;
    gap: 32px;
}

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: color 0.3s;
}

.nav a:hover {
    color: var(--accent);
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
}

.lang-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s;
    padding: 4px 8px;
}

.lang-btn:hover,
.lang-btn.active {
    color: var(--accent);
}

.lang-divider {
    color: var(--text-muted);
}

/* Hero */
.hero {
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background:
        linear-gradient(135deg, rgba(10,10,10,0.9) 0%, rgba(20,20,20,0.7) 100%),
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23222" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    background-size: cover, 50px 50px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(201, 162, 39, 0.1) 0%, transparent 50%);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 60%, var(--bg-dark) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 0 24px;
    max-width: 900px;
}

.hero-title {
    font-size: clamp(32px, 6vw, 64px);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.hero-title-accent {
    display: block;
    color: var(--accent);
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

.hero-cta {
    display: inline-block;
    padding: 16px 48px;
    background: var(--accent);
    color: var(--bg-dark);
    text-decoration: none;
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 2px;
    text-transform: uppercase;
    transition: all 0.3s;
}

.hero-cta:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(201, 162, 39, 0.3);
}

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

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

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

/* About */
.about {
    background: var(--bg-section);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.stat-item {
    text-align: center;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    transition: border-color 0.3s;
}

.stat-item:hover {
    border-color: var(--accent);
}

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Products */
.products {
    background: var(--bg-dark);
}

.products-intro {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: all 0.3s;
}

.product-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.product-image-wrapper {
    position: relative;
    width: 100%;
    padding-top: 75%;
    overflow: hidden;
}

.product-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-image-mask {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 40%;
    height: 40%;
    background: linear-gradient(135deg, transparent 50%, var(--mask-color) 50%);
}

.product-info {
    padding: 20px;
}

.product-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.product-name-zh {
    font-size: 12px;
    color: var(--text-muted);
}

/* Quality */
.quality {
    background: var(--bg-section);
}

.quality-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.quality-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 40px 24px;
    text-align: center;
    transition: border-color 0.3s;
}

.quality-card:hover {
    border-color: var(--accent);
}

.quality-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.quality-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.quality-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Services */
.services {
    background: var(--bg-dark);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 32px;
    transition: border-color 0.3s;
}

.service-card:hover {
    border-color: var(--accent);
}

.service-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 12px;
}

.service-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Footer */
.footer {
    background: var(--bg-section);
    border-top: 1px solid var(--border);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 40px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-brand .logo-icon {
    font-size: 32px;
}

.footer-brand .logo-text {
    font-size: 20px;
}

.footer-tagline {
    color: var(--text-muted);
    font-size: 12px;
    margin-top: 8px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--accent);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 13px;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 16px;
    }

    .nav {
        gap: 20px;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .quality-grid,
    .services-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: 32px;
        align-items: center;
        text-align: center;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}