:root {
    --gradient-blue: linear-gradient(135deg, #0F4C9E 0%, #2563EB 50%, #22D3EE 100%);
    --gradient-gold: linear-gradient(135deg, #F59E0B 0%, #FBBF24 100%);
    --gradient-purple: linear-gradient(135deg, #0F4C9E 0%, #8B5CF6 100%);
}
* { scroll-behavior: smooth; }
body { background: #050B1A; color: #E2E8F0; font-family: system-ui, -apple-system, sans-serif; }
.circuit-bg {
    background-image:
        linear-gradient(rgba(0, 240, 255, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.025) 1px, transparent 1px);
    background-size: 45px 45px;
}
.gradient-text {
    background: var(--gradient-blue);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.glass-card {
    background: linear-gradient(135deg, rgba(15, 32, 62, 0.7) 0%, rgba(20, 42, 82, 0.5) 100%);
    border: 1px solid rgba(37, 99, 235, 0.15);
    backdrop-filter: blur(10px);
}
.nav-link { position: relative; transition: color 0.15s ease-out; }
.nav-link::after {
    content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
    background: var(--gradient-blue); transition: width 0.15s ease-out; border-radius: 2px;
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link:hover { color: #22D3EE !important; }
.btn-primary {
    background: var(--gradient-blue);
    transition: all 0.15s ease-out;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}
.section-title {
    font-size: 2rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.75rem;
}
.section-subtitle {
    color: #94A3B8;
    font-size: 1rem;
    margin-bottom: 2rem;
}
.section-divider {
    width: 60px; height: 3px; background: var(--gradient-blue);
    border-radius: 2px;
}
/* 时间轴 */
.timeline {
    position: relative;
    padding-left: 2rem;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 0.5rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, #0F4C9E, #22D3EE, #8B5CF6);
    border-radius: 1px;
}
.timeline-item {
    position: relative;
    padding-bottom: 2rem;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot {
    position: absolute;
    left: -2rem;
    top: 0.25rem;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background: var(--gradient-blue);
    border: 3px solid #050B1A;
    box-shadow: 0 0 12px rgba(34, 211, 238, 0.5);
}
.timeline-year {
    font-size: 1.125rem;
    font-weight: 700;
    color: #22D3EE;
    margin-bottom: 0.25rem;
}
.timeline-title {
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 0.375rem;
}
.timeline-desc {
    font-size: 0.875rem;
    color: #94A3B8;
    line-height: 1.7;
}
/* 文化卡片 */
.culture-card {
    background: linear-gradient(135deg, rgba(15, 32, 62, 0.8) 0%, rgba(20, 42, 82, 0.6) 100%);
    border: 1px solid rgba(37, 99, 235, 0.15);
    border-radius: 1rem;
    padding: 1.75rem;
    transition: all 0.15s ease-out;
    position: relative;
    overflow: hidden;
}
.culture-card:hover {
    transform: translateY(-4px);
    border-color: rgba(34, 211, 238, 0.4);
    box-shadow: 0 12px 30px rgba(37, 99, 235, 0.2);
}
.culture-icon {
    width: 3rem;
    height: 3rem;
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}
.culture-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.5rem;
}
.culture-desc {
    font-size: 0.875rem;
    color: #94A3B8;
    line-height: 1.7;
}
/* 团队成员卡片 */
.team-card {
    background: linear-gradient(135deg, rgba(15, 32, 62, 0.8) 0%, rgba(20, 42, 82, 0.6) 100%);
    border: 1px solid rgba(37, 99, 235, 0.15);
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.15s ease-out;
}
.team-card:hover {
    transform: translateY(-4px);
    border-color: rgba(34, 211, 238, 0.4);
    box-shadow: 0 12px 30px rgba(37, 99, 235, 0.2);
}
.team-avatar {
    width: 5rem;
    height: 5rem;
    border-radius: 50%;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: #fff;
    font-weight: 700;
}
.team-name {
    font-size: 1.125rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.25rem;
}
.team-position {
    font-size: 0.8125rem;
    color: #22D3EE;
    margin-bottom: 0.75rem;
}
.team-desc {
    font-size: 0.8125rem;
    color: #94A3B8;
    line-height: 1.6;
}
/* 数据看板 */
.stat-card {
    background: linear-gradient(135deg, rgba(15, 32, 62, 0.6) 0%, rgba(20, 42, 82, 0.4) 100%);
    border: 1px solid rgba(37, 99, 235, 0.15);
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.15s ease-out;
}
.stat-card:hover {
    transform: translateY(-4px);
    border-color: rgba(34, 211, 238, 0.4);
    box-shadow: 0 12px 30px rgba(37, 99, 235, 0.2);
}
.stat-number {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 0.5rem;
}
.stat-label {
    font-size: 0.875rem;
    color: #94A3B8;
}
/* 荣誉卡片 */
.honor-card {
    background: linear-gradient(135deg, rgba(15, 32, 62, 0.8) 0%, rgba(20, 42, 82, 0.6) 100%);
    border: 1px solid rgba(245, 158, 11, 0.15);
    border-radius: 1rem;
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.15s ease-out;
}
.honor-card:hover {
    transform: translateY(-3px);
    border-color: rgba(245, 158, 11, 0.4);
    box-shadow: 0 10px 25px rgba(245, 158, 11, 0.15);
}
.honor-icon {
    width: 3rem;
    height: 3rem;
    border-radius: 0.75rem;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.1));
    border: 1px solid rgba(245, 158, 11, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: #FBBF24;
    flex-shrink: 0;
}
.honor-name {
    font-size: 0.9375rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 0.125rem;
}
.honor-date {
    font-size: 0.75rem;
    color: #94A3B8;
}
.footer-nav-col h4 { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 1rem; }
.footer-nav-col ul li { margin-bottom: 0.5rem; }
.footer-nav-col ul li a { color: #94A3B8; font-size: 0.875rem; transition: color 0.15s ease-out; }
.footer-nav-col ul li a:hover { color: #22D3EE; }
.anim-fade-up { opacity: 0; transform: translateY(30px); transition: all 0.6s ease-out; }
.anim-fade-up.visible { opacity: 1; transform: translateY(0); }
@media (max-width: 640px) {
    .section-title { font-size: 1.5rem; }
}