:root {
    --bg: #0a0a1a;
    --card: rgba(20, 20, 50, 0.8);
    --text: #e0e0ff;
    --accent: #00f2fe;
    --gold: #ffd700;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
}
/* 星空背景 */
.stars {
    position: fixed; top:0; left:0; width:100%; height:100%;
    background: radial-gradient(ellipse at bottom, #1b2735 0%, #090a0f 100%);
    z-index: -1;
}
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    backdrop-filter: blur(5px);
}
.logo {
    text-align: center;
    font-size: 2.5rem;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #ffe66d);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 20px rgba(255,255,255,0.3);
    margin: 20px 0;
    cursor: pointer;
    user-select: none;
    transition: transform 0.2s;
}
.logo:active { transform: scale(0.95); }
.nav {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 25px;
}
.nav a, .section-tabs a {
    color: var(--accent);
    text-decoration: none;
    padding: 8px 18px;
    background: var(--card);
    border-radius: 20px;
    border: 1px solid rgba(255,255,255,0.1);
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}
.nav a:hover, .section-tabs a:hover, .section-tabs a.active {
    background: var(--accent);
    color: #000;
    box-shadow: 0 0 20px var(--accent);
}
.section-tabs {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin: 20px 0;
}
.post-item {
    background: var(--card);
    border-radius: 15px;
    padding: 18px;
    margin-bottom: 15px;
    border: 1px solid rgba(255,255,255,0.05);
    backdrop-filter: blur(10px);
    transition: transform 0.2s, box-shadow 0.3s;
}
.post-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.5);
}
.post-title a {
    color: #fff;
    font-size: 1.3rem;
    text-decoration: none;
    font-weight: bold;
}
.level-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 10px;
    background: linear-gradient(135deg, #ff9a9e, #fad0c4);
    color: #000;
    font-weight: bold;
    font-size: 0.8rem;
    margin: 0 5px;
    animation: glowPulse 2s infinite;
}
@keyframes glowPulse {
    0% { box-shadow: 0 0 5px #ff9a9e; }
    50% { box-shadow: 0 0 20px #fad0c4; }
    100% { box-shadow: 0 0 5px #ff9a9e; }
}
/* 移动端适配 */
@media (max-width: 600px) {
    .container { padding: 10px; }
    .logo { font-size: 1.8rem; }
    .nav { gap: 8px; }
    .nav a, .section-tabs a { padding: 6px 12px; font-size: 0.9rem; }
}