/* 字体应用 */
body { font-family: 'Inter', sans-serif; background-color: #f8fafc; color: #1e293b; overflow-x: hidden; }
h1, h2, h3, h4, h5, h6, .font-heading { font-family: 'Plus Jakarta Sans', sans-serif; }

/* 导航品牌：Logo + 文字 */
.brand-lockup {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}
.brand-logo {
    height: 44px;
    width: auto;
    display: block;
    flex-shrink: 0;
}
.brand-lockup--footer {
    margin-bottom: 1rem;
}
.brand-logo--footer {
    height: 36px;
}

/* 玻璃态导航栏 */
.glass-nav {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

/* 高级悬浮卡片 */
.premium-card {
    background: #ffffff;
    border: 1px solid #f1f5f9;
    box-shadow: 0 10px 40px -10px rgba(0,0,0,0.05);
    transition: all 0.4s ease;
}
.premium-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px -10px rgba(14, 165, 233, 0.15);
    border-color: #e0f2fe;
}

/* 隐藏初始状态以供 GSAP 动画调用 */
.gsap-reveal { opacity: 0; transform: translateY(40px); }

/* --- 核心修复：纯 CSS 高级动态背景 (Ken Burns 效果) --- */
.animated-bg-wrapper {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
    background-color: #0f172a;
}
.animated-bg-image {
    position: absolute;
    inset: -5%; /* 稍微放大以留出平移空间 */
    width: 110%;
    height: 110%;
    background-image: url('../images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    /* 30秒极其缓慢的放大平移，尽显顶级机构的稳重与神秘 */
    animation: slowPanZoom 30s linear infinite alternate;
}
/* 叠加的暗色渐变，确保文字清晰 */
.bg-gradient-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg, rgba(15,23,42,0.95) 0%, rgba(15,23,42,0.7) 50%, rgba(15,23,42,0.3) 100%);
}

@keyframes slowPanZoom {
    0% { transform: scale(1) translate(0, 0); }
    100% { transform: scale(1.08) translate(-1%, -1%); }
}