:root {
    --primary-red: #ff4757;
    --primary-green: #2ed573;
    --dark-bg: #0a0a0a;
    --card-bg: #1a1a1a;
    --text-white: #ffffff;
    --text-gray: #bdc3c7;
    --accent: #ff6b81;
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'Noto Sans SC', sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-white);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(15px);
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-white);
}

.logo .highlight {
    color: var(--primary-red);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-gray);
    font-weight: 400;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--primary-green);
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-white);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero-section {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: url('https://tse-mm.bing.com/th?q=cinematic+theater+seats+dark') no-repeat center center/cover;
    position: relative;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, rgba(10,10,10,0.4), rgba(10,10,10,1));
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 800px;
}

.hero-section h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.hero-section h2 {
    font-size: 2rem;
    color: var(--primary-green);
    margin-bottom: 1.5rem;
}

.hero-section p {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 2.5rem;
}

/* 按钮 */
.btn {
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 700;
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
}

.btn-primary {
    background-color: var(--primary-red);
    color: white;
}

.btn-primary:hover {
    background-color: var(--accent);
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(255, 71, 87, 0.3);
}

.btn-outline {
    border: 2px solid var(--text-white);
    color: white;
    margin-left: 1rem;
}

.btn-outline:hover {
    background: white;
    color: var(--dark-bg);
}

/* 产品库 */
.products-section {
    padding: 6rem 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.filters {
    display: flex;
    gap: 0.5rem;
}

.filter-btn {
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: none;
    color: var(--text-gray);
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn.active, .filter-btn:hover {
    background: var(--primary-green);
    color: var(--dark-bg);
    border-color: var(--primary-green);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 2rem;
}

.product-card {
    background: var(--card-bg);
    border-radius: 15px;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.product-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-red);
}

.product-thumb {
    position: relative;
    aspect-ratio: 2/3;
    overflow: hidden;
}

.product-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-info {
    padding: 1.5rem;
}

.product-info h4 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--primary-red);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
}

/* 布局辅助 */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.intro-section { padding: 6rem 0; }
.intro-image img { width: 100%; border-radius: 20px; box-shadow: 0 30px 60px rgba(0,0,0,0.5); }
.section-tag { color: var(--primary-green); text-transform: uppercase; font-weight: 700; letter-spacing: 2px; }

/* 动画效果 */
.animate-up { opacity: 0; transform: translateY(30px); animation: fadeUp 0.8s forwards; }
.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

@keyframes fadeUp {
    to { opacity: 1; transform: translateY(0); }
}

/* 毛玻璃 */
.glass {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 联系表单 */
.contact-section { padding: 8rem 0; }
.contact-box {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    border-radius: 30px;
    overflow: hidden;
}

.contact-info { padding: 4rem; background: var(--primary-red); color: white; }
.contact-form { padding: 4rem; background: var(--card-bg); }

.form-group { margin-bottom: 1.5rem; }
.form-group input, .form-group textarea {
    width: 100%;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 1rem;
    color: white;
    border-radius: 10px;
    outline: none;
}

.form-group input:focus { border-color: var(--primary-green); }

/* 页脚 */
.footer {
    padding: 4rem 0;
    border-top: 1px solid rgba(255,255,255,0.05);
    text-align: center;
    color: var(--text-gray);
}

/* 响应式 */
@media (max-width: 992px) {
    .grid-2, .contact-box { grid-template-columns: 1fr; }
    .hero-section h1 { font-size: 2.5rem; }
    .navbar .nav-links { display: none; }
    .mobile-toggle { display: block; }
}