/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 高级配色方案 - 避免AI味过重的渐变蓝紫色 */
    --primary-black: #0a0a0a;
    --secondary-black: #1a1a1a;
    --accent-gold: #d4af37;
    --accent-silver: #c0c0c0;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --border-color: #333333;
    --card-bg: #121212;
    --hover-bg: #1e1e1e;
    
    /* 字体 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;
    
    /* 圆角 */
    --border-radius: 8px;
    --border-radius-lg: 16px;
    
    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent-gold);
    margin-bottom: -0.2rem;
}

.logo span {
    font-size: 0.7rem;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gold);
    transition: var(--transition);
}

.nav-menu a:hover::after {
    width: 100%;
}

/* 英雄区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--spacing-xxl) var(--spacing-lg);
    background: linear-gradient(135deg, var(--primary-black) 0%, var(--secondary-black) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 70% 30%, rgba(212, 175, 55, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 500px;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xl);
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-gold);
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.hero-image {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
}

.hero-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
}

.hero-image:hover img {
    transform: scale(1.05);
}

/* 车型展示区域 */
.car-section {
    padding: var(--spacing-xxl) 0;
    position: relative;
}

.car-section.alt {
    background: var(--card-bg);
}

.car-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.car-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
}

.car-section.alt .car-content {
    direction: rtl;
}

.car-section.alt .car-info {
    direction: ltr;
}

.car-badge {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.model-name {
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-gold);
    line-height: 1;
}

.model-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.car-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.car-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.7;
}

.car-specs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.spec-item {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.spec-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.spec-value {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
}

.car-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.feature-tag {
    background: rgba(212, 175, 55, 0.1);
    color: var(--accent-gold);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid rgba(212, 175, 55, 0.3);
    transition: var(--transition);
}

.feature-tag:hover {
    background: rgba(212, 175, 55, 0.2);
    transform: translateY(-2px);
}

.car-image {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.car-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: var(--transition);
}

.car-image:hover img {
    transform: scale(1.03);
}

/* 技术亮点区域 */
.technology {
    padding: var(--spacing-xxl) 0;
    background: var(--secondary-black);
}

.tech-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-primary);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.tech-card {
    background: var(--card-bg);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.tech-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-gold);
    box-shadow: 0 15px 30px rgba(212, 175, 55, 0.1);
}

.tech-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.tech-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--accent-gold);
}

.tech-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 联系区域 */
.contact {
    padding: var(--spacing-xxl) 0;
    background: var(--primary-black);
    text-align: center;
}

.contact-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.contact-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xxl);
    margin-bottom: var(--spacing-xl);
}

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.contact-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.contact-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-gold);
}

.cta-button {
    background: linear-gradient(135deg, var(--accent-gold) 0%, #b8941f 100%);
    color: var(--primary-black);
    border: none;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(212, 175, 55, 0.3);
}

/* 页脚 */
.footer {
    background: var(--secondary-black);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xxl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo h3 {
    font-size: 2rem;
    color: var(--accent-gold);
    margin-bottom: 0.2rem;
}

.footer-logo span {
    font-size: 0.8rem;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.footer-section h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

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

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

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

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

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-content,
    .car-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .hero-stats {
        justify-content: center;
        gap: var(--spacing-lg);
    }
    
    .car-section.alt .car-content {
        direction: ltr;
    }
    
    .car-image {
        order: -1;
    }
    
    .contact-info {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .model-name {
        font-size: 2.5rem;
    }
    
    .car-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

/* 滚动动画 */
@media (prefers-reduced-motion: no-preference) {
    .car-section {
        opacity: 0;
        transform: translateY(50px);
        transition: opacity 0.6s ease-out, transform 0.6s ease-out;
    }
    
    .car-section.visible {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 加载动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content > * {
    animation: fadeInUp 0.8s ease-out forwards;
}

.hero-content > *:nth-child(2) {
    animation-delay: 0.2s;
}

.hero-content > *:nth-child(3) {
    animation-delay: 0.4s;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--primary-black);
}

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

::-webkit-scrollbar-thumb:hover {
    background: #b8941f;
}