/* ===== 设计系统变量 ===== */
:root {
    /* 背景色 */
    --bg-black: #000000;
    --bg-dark-grey: #121212;
    --bg-midnight: #0A0E27;
    
    /* 文字色 */
    --text-primary: #FFFFFF;
    --text-secondary: #B8BCC8;
    
    /* 强调色 - 霓虹色系 */
    --accent-neon: #39FF14;
    --accent-blue: #0080FF;
    --accent-gold: #FFD700;
    --accent-purple: #BF00FF;
    --accent-purple-text: #D966FF;
    
    /* 边框/分割线 */
    --border-color: #26262E;
    
    /* 圆角 */
    --radius: 10px;
    
    /* 间距 */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;
    
    /* 字体 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* 阴影 */
    --shadow-neon: 0 0 20px rgba(57, 255, 20, 0.3);
    --shadow-blue: 0 0 20px rgba(0, 128, 255, 0.3);
    --shadow-purple: 0 0 20px rgba(191, 0, 255, 0.3);
}

/* ===== 基础重置 ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-black);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ===== 容器 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== 排版 ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 900;
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
}

h3 {
    font-size: 18px;
}

p {
    margin-bottom: var(--spacing-sm);
    max-width: 34em;
}

a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* ===== 按钮系统 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 44px;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-neon);
    color: var(--bg-black);
    box-shadow: 0 0 10px rgba(57, 255, 20, 0.5);
}

.btn-primary:hover {
    background: #4dff2e;
    box-shadow: 0 0 20px rgba(57, 255, 20, 0.8);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: transparent;
    color: var(--accent-blue);
    border: 2px solid var(--accent-blue);
}

.btn-secondary:hover {
    background: var(--accent-blue);
    color: var(--text-primary);
    box-shadow: var(--shadow-blue);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-ghost:hover {
    color: var(--accent-neon);
    border-color: var(--accent-neon);
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
    min-height: 48px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ===== 顶部导航栏 ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

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

.brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.brand-icon {
    filter: drop-shadow(0 0 10px rgba(57, 255, 20, 0.5));
}

.brand-text {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius);
    transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-neon);
    background: rgba(57, 255, 20, 0.1);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

/* ===== Hero 区域 ===== */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-black) 0%, var(--bg-midnight) 100%);
    position: relative;
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-md);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-content {
    z-index: 2;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent-neon);
    margin-bottom: var(--spacing-md);
    text-shadow: 0 0 10px rgba(57, 255, 20, 0.5);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-neon) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.hero-visual {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.neon-circle {
    width: 300px;
    height: 300px;
    border: 2px solid var(--accent-neon);
    border-radius: 50%;
    box-shadow: 0 0 30px rgba(57, 255, 20, 0.3), inset 0 0 30px rgba(57, 255, 20, 0.1);
    animation: pulse 3s ease-in-out infinite;
}

.neon-square {
    position: absolute;
    width: 200px;
    height: 200px;
    border: 2px solid var(--accent-blue);
    border-radius: var(--radius);
    box-shadow: 0 0 30px rgba(0, 128, 255, 0.3);
    animation: rotate 8s linear infinite;
}

.neon-triangle {
    position: absolute;
    width: 0;
    height: 0;
    border-left: 80px solid transparent;
    border-right: 80px solid transparent;
    border-bottom: 140px solid var(--accent-purple);
    opacity: 0.3;
    filter: blur(2px);
    animation: float 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.8; }
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* ===== 风格信息条 ===== */
.style-chips {
    padding: var(--spacing-lg) 0;
    background: var(--bg-dark-grey);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.chips-row {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
}

.chip {
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    background: var(--bg-black);
    transition: all 0.3s ease;
}

.chip:hover {
    border-color: var(--accent-neon);
    color: var(--accent-neon);
    box-shadow: 0 0 10px rgba(57, 255, 20, 0.3);
}

/* ===== 特性卡片区 ===== */
.features {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-black);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    font-size: clamp(1.5rem, 4vw, 2rem);
}

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

.feature-card {
    padding: var(--spacing-md);
    background: var(--bg-dark-grey);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    text-align: center;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-neon);
    box-shadow: 0 0 20px rgba(57, 255, 20, 0.2);
}

.feature-icon {
    margin-bottom: var(--spacing-sm);
}

.feature-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.feature-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== 产品展示预览 ===== */
.products-preview {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-dark-grey);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.product-card {
    padding: var(--spacing-md);
    background: var(--bg-black);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    text-align: center;
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-blue);
    box-shadow: 0 0 20px rgba(0, 128, 255, 0.2);
}

.product-image {
    margin-bottom: var(--spacing-sm);
    display: flex;
    justify-content: center;
}

.product-name {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.product-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.section-action {
    text-align: center;
}

/* ===== 团队成员预览 ===== */
.team-preview {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-black);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.team-card {
    padding: var(--spacing-md);
    background: var(--bg-dark-grey);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    text-align: center;
    transition: all 0.3s ease;
}

.team-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-purple);
    box-shadow: 0 0 20px rgba(191, 0, 255, 0.2);
}

.team-avatar {
    margin-bottom: var(--spacing-sm);
    display: flex;
    justify-content: center;
}

.team-name {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.team-role {
    font-size: 13px;
    color: var(--accent-neon);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-xs);
}

.team-desc {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ===== 联系表单 ===== */
.contact-form {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-dark-grey);
}

.form {
    max-width: 600px;
    margin: 0 auto;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.form-group {
    margin-bottom: var(--spacing-sm);
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
    color: var(--text-primary);
    background: var(--bg-black);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    transition: all 0.3s ease;
    font-family: var(--font-family);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-neon);
    box-shadow: 0 0 10px rgba(57, 255, 20, 0.3);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-secondary);
}

/* ===== 页脚 ===== */
.footer {
    padding: var(--spacing-xl) 0 var(--spacing-md);
    background: var(--bg-black);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 14px;
    color: var(--text-primary);
}

.footer-icon {
    filter: drop-shadow(0 0 10px rgba(57, 255, 20, 0.5));
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

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

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

.footer-bottom p {
    font-size: 13px;
    color: var(--text-secondary);
    margin: 0;
}

.footer-bottom a {
    color: var(--text-secondary);
}

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

/* ===== 响应式适配 ===== */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-dark-grey);
        padding: var(--spacing-sm);
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-visual {
        height: 300px;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

/* ===== 无障碍 ===== */
:focus-visible {
    outline: 2px solid var(--accent-neon);
    outline-offset: 2px;
}

/* ===== 减弱动效 ===== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}