/* ========================================
   格物在线 - 现代科技公司官网样式
   完全重新设计 - 2026
   ======================================== */

/* ========== CSS 变量 ========== */
:root {
    /* 主色调 - 科技蓝 */
    --primary: #0066FF;
    --primary-dark: #0052CC;
    --primary-light: #3385FF;
    --primary-glow: rgba(0, 102, 255, 0.3);
    
    /* 辅助色 - 紫色 */
    --accent: #8B5CF6;
    --accent-light: #A78BFA;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #0066FF 0%, #8B5CF6 100%);
    --gradient-dark: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 50%, #2d1b4e 100%);
    --gradient-light: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
    
    /* 中性色 */
    --bg-dark: #0a0e27;
    --bg-card: #1a1f3a;
    --bg-light: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --text-white: #ffffff;
    
    /* 边框和阴影 */
    --border-light: rgba(255, 255, 255, 0.1);
    --border-dark: rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 40px var(--primary-glow);
    
    /* 间距 */
    --container-width: 1280px;
    --header-height: 80px;
    
    /* 动画 */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

img {
    max-width: 100%;
    display: block;
}

ul, ol {
    list-style: none;
}

/* ========== 工具类 ========== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 120px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 80px;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-title p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 16px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--primary-glow);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

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

/* ========== 头部导航 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-dark);
    z-index: 1000;
    transition: all var(--transition-base);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
}

.nav-menu {
    display: flex;
    gap: 8px;
}

.nav-menu a {
    padding: 10px 20px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary);
    background: rgba(0, 102, 255, 0.08);
}

.nav-actions {
    display: flex;
    gap: 12px;
}

/* ========== Hero Banner ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-dark);
    position: relative;
    overflow: hidden;
    padding-top: var(--header-height);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(0, 102, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-light);
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    color: var(--text-white);
    margin-bottom: 24px;
    letter-spacing: -0.03em;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
    margin-top: 80px;
    padding-top: 40px;
    border-top: 1px solid var(--border-light);
}

.hero-stat {
    text-align: center;
}

.hero-stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-white);
    display: block;
}

.hero-stat-label {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 4px;
}

/* ========== 服务卡片 ========== */
.services {
    background: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.service-card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--border-dark);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-light);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 24px;
}

.service-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.service-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ========== 关于我们 ========== */
.about {
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
}

.about-image::before {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: 20px;
    bottom: 20px;
    border: 2px solid var(--primary);
    border-radius: 20px;
    z-index: -1;
}

.about-text h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.9;
}

.about-features {
    display: grid;
    gap: 16px;
    margin-top: 32px;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 12px;
}

.about-feature-icon {
    width: 24px;
    height: 24px;
    background: var(--gradient-primary);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.75rem;
    flex-shrink: 0;
}

/* ========== 办公环境 ========== */
.office {
    background: var(--bg-light);
}

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

.office-card {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    aspect-ratio: 4/3;
    cursor: pointer;
}

.office-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.office-card:hover img {
    transform: scale(1.1);
}

.office-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 60%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 24px;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.office-card:hover .office-overlay {
    opacity: 1;
}

.office-overlay h4 {
    color: white;
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.office-overlay p {
    color: rgba(255,255,255,0.8);
    font-size: 0.875rem;
}

/* ========== CTA 区域 ========== */
.cta {
    background: var(--gradient-dark);
    text-align: center;
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
}

.cta h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 16px;
}

.cta p {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 32px;
}

/* ========== 页脚 ========== */
.footer {
    background: var(--bg-dark);
    padding: 80px 0 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand p {
    color: var(--text-light);
    margin-top: 16px;
    line-height: 1.8;
}

.footer-column h4 {
    color: var(--text-white);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-column ul {
    display: grid;
    gap: 12px;
}

.footer-column a {
    color: var(--text-light);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--primary);
}

.footer-bottom {
    padding-top: 40px;
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    color: var(--text-light);
    font-size: 0.875rem;
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: var(--primary);
    color: white;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .header-inner {
        flex-wrap: wrap;
    }
    
    .nav-menu {
        order: 3;
        width: 100%;
        justify-content: center;
        padding-top: 10px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

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

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

.service-card {
    animation: fadeInUp 0.6s ease-out backwards;
}

.service-card:nth-child(1) { animation-delay: 0.1s; }
.service-card:nth-child(2) { animation-delay: 0.2s; }
.service-card:nth-child(3) { animation-delay: 0.3s; }
.service-card:nth-child(4) { animation-delay: 0.4s; }
.service-card:nth-child(5) { animation-delay: 0.5s; }
.service-card:nth-child(6) { animation-delay: 0.6s; }