/* 极光梦境主题 - 完全原创设计 */
:root {
    --aurora-1: #8e44ad;
    --aurora-2: #3498db;
    --aurora-3: #1abc9c;
    --aurora-4: #f1c40f;
    --dark-space: #0f0f1a;
    --cosmic-dust: rgba(255,255,255,0.05);
    --font-special: 'Orbitron', 'PingFang SC', sans-serif;
    --font-content: 'Nunito', 'Microsoft YaHei', sans-serif;
}

@keyframes aurora-flow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: var(--dark-space);
    color: white;
    font-family: var(--font-content);
    line-height: 1.8;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 20% 30%, var(--cosmic-dust) 0%, transparent 25%),
        radial-gradient(circle at 80% 70%, var(--cosmic-dust) 0%, transparent 25%);
}

.aurora-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(-45deg, 
        var(--aurora-1), 
        var(--aurora-2), 
        var(--aurora-3), 
        var(--aurora-4));
    background-size: 400% 400%;
    animation: aurora-flow 15s ease infinite;
    opacity: 0.3;
    filter: blur(80px);
}

/* 非对称布局头部 */
header {
    padding: 2rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.logo {
    font-family: var(--font-special);
    font-size: 2.2rem;
    font-weight: 700;
    background: linear-gradient(to right, 
        var(--aurora-4), 
        var(--aurora-3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 15px rgba(255,255,255,0.2);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: rgba(255,255,255,0.8);
    font-size: 1.1rem;
    position: relative;
    padding: 0.5rem 0;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(to right, 
        var(--aurora-3), 
        var(--aurora-2));
    transition: width 0.4s ease;
}

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

/* 流体内容容器 */
.main-container {
    display: grid;
    grid-template-columns: 1fr minmax(0, 2fr) 1fr;
    gap: 2rem;
    padding: 0 5%;
    margin: 3rem auto;
}

.main-content {
    grid-column: 2;
    background: rgba(15, 15, 26, 0.7);
    backdrop-filter: blur(10px);
    border-radius: 1.5rem;
    padding: 2.5rem;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.3),
        inset 0 0 0 1px rgba(255,255,255,0.05);
}

.sidebar {
    grid-column: 3;
    position: sticky;
    top: 2rem;
    align-self: start;
}

/* 3D卡片效果 */
.article-card {
    background: linear-gradient(
        145deg,
        rgba(46, 49, 146, 0.2),
        rgba(15, 15, 26, 0.5)
    );
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
    transition: transform 0.4s, box-shadow 0.4s;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.05);
}

.article-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        45deg,
        transparent 60%,
        rgba(30, 215, 96, 0.1)
    );
    z-index: -1;
}

.article-card:hover {
    transform: translateY(-5px) rotate(1deg);
    box-shadow: 
        0 15px 30px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(255,255,255,0.05);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 0.8rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(to right, 
        white, 
        var(--aurora-3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* 动态标签 */
.tag {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: rgba(255,255,255,0.1);
    border-radius: 2rem;
    font-size: 0.8rem;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
    transition: all 0.3s;
}

.tag:hover {
    background: var(--aurora-3);
    transform: scale(1.05);
}

/* 星空分隔线 */
.divider {
    position: relative;
    height: 1px;
    margin: 3rem 0;
    background: rgba(255,255,255,0.05);
}

.divider::after {
    content: '✦ ✦ ✦';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--dark-space);
    padding: 0 1rem;
    color: var(--aurora-3);
    font-size: 0.8rem;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .main-container {
        grid-template-columns: 1fr;
    }
    
    .main-content, .sidebar {
        grid-column: 1;
    }
    
    .sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}