/* ============================================
   学习中心 - 赛博朋克风格
   ============================================ */
.cyber-search-section {
    padding: 30px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.search-container { }

.search-bar-cyber {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
    transition: var(--transition);
}

.search-bar-cyber:focus-within {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
}

.search-icon-cyber { font-size: 18px; opacity: 0.6; }

.search-input-cyber {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 15px;
}

.search-input-cyber::placeholder { color: var(--text-secondary); }

.search-shortcut {
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    font-size: 12px;
    color: var(--text-secondary);
}

.category-tabs {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.cat-tab {
    padding: 10px 20px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.cat-tab:hover {
    border-color: rgba(0, 240, 255, 0.3);
    color: var(--text-primary);
}

.cat-tab.active {
    background: rgba(0, 240, 255, 0.1);
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
}

.cat-icon { font-size: 16px; }

/* 热门推荐 */
.cyber-hot-section {
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.hot-carousel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.hot-card-cyber {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.hot-card-cyber:hover {
    border-color: rgba(0, 240, 255, 0.5);
    box-shadow: var(--shadow-neon);
    transform: translateY(-6px);
}

.hot-badge {
    position: absolute;
    top: 12px; left: 12px;
    padding: 4px 12px;
    background: rgba(255, 107, 53, 0.9);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    z-index: 2;
}

.hot-badge.new {
    background: rgba(124, 58, 237, 0.9);
}

.hot-badge.hot {
    background: rgba(255, 0, 110, 0.9);
}

.hot-cover {
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.cover-icon {
    font-size: 64px;
    filter: drop-shadow(0 0 20px rgba(255, 255, 255, 0.3));
    transition: var(--transition);
}

.hot-card-cyber:hover .cover-icon {
    transform: scale(1.2) rotate(5deg);
}

.cover-pulse {
    position: absolute;
    width: 80px; height: 80px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: coverPulse 2s ease-in-out infinite;
}

@keyframes coverPulse {
    0%, 100% { transform: scale(0.8); opacity: 0.5; }
    50% { transform: scale(1.5); opacity: 0; }
}

.hot-info { padding: 20px; }

.hot-info h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.4;
}

.hot-meta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.meta-tag {
    font-size: 12px;
    color: var(--text-secondary);
    padding: 3px 8px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 4px;
}

.meta-tag.free {
    color: var(--neon-green);
    background: rgba(0, 255, 136, 0.08);
}

.meta-tag.vip {
    color: var(--neon-yellow);
    background: rgba(255, 230, 0, 0.08);
}

.hot-progress { }

.progress-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.progress-bar-cyber {
    height: 4px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
    border-radius: 2px;
    transition: width 1s ease;
}

/* 资料网格 */
.cyber-materials-section {
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.section-sort {
    display: flex;
    gap: 8px;
}

.sort-btn {
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
}

.sort-btn.active, .sort-btn:hover {
    background: rgba(0, 240, 255, 0.08);
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.material-card-cyber {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}

.material-card-cyber:hover {
    border-color: rgba(0, 240, 255, 0.5);
    box-shadow: var(--shadow-neon);
    transform: translateY(-4px);
}

.mcard-cover {
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    position: relative;
    overflow: hidden;
}

.mcard-cover::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 100%; height: 40%;
    background: linear-gradient(transparent, var(--glass-bg));
}

.mcard-body { padding: 16px; }

.mcard-title {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.mcard-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-secondary);
}

.mcard-downloads { display: flex; align-items: center; gap: 4px; }
.mcard-rating { color: var(--neon-yellow); }

.mcard-tag {
    position: absolute;
    top: 10px; right: 10px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
    z-index: 2;
}

.mcard-tag.free {
    background: rgba(0, 255, 136, 0.2);
    color: var(--neon-green);
    border: 1px solid rgba(0, 255, 136, 0.3);
}

.mcard-tag.vip {
    background: rgba(255, 230, 0, 0.2);
    color: var(--neon-yellow);
    border: 1px solid rgba(255, 230, 0, 0.3);
}

.mcard-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.mcard-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mcard-btn {
    padding: 6px 16px;
    background: linear-gradient(135deg, var(--neon-cyan), #0891b2);
    border: none;
    border-radius: 6px;
    color: #000;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
}

.mcard-btn:hover {
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
}

/* 加载更多 */
.load-more-cyber {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 20px;
    margin-top: 30px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 14px;
    transition: var(--transition);
}

.load-more-cyber:hover {
    color: var(--neon-cyan);
}

.load-arrow {
    font-size: 20px;
    animation: bounceDown 1.5s ease-in-out infinite;
}

@keyframes bounceDown {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(6px); }
}

/* 学习计划 */
.cyber-plan-section {
    padding: 60px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.plan-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.plan-card-cyber {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.plan-card-cyber::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 3px;
    background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
    opacity: 0;
    transition: var(--transition);
}

.plan-card-cyber:hover::before { opacity: 1; }
.plan-card-cyber:hover { transform: translateY(-4px); box-shadow: var(--shadow-neon); }

.plan-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.plan-icon {
    width: 48px; height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.plan-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
}

.plan-badge.free {
    background: rgba(0, 255, 136, 0.15);
    color: var(--neon-green);
    border: 1px solid rgba(0, 255, 136, 0.3);
}

.plan-badge.hot {
    background: rgba(255, 0, 110, 0.15);
    color: var(--neon-pink);
    border: 1px solid rgba(255, 0, 110, 0.3);
}

.plan-badge.new {
    background: rgba(124, 58, 237, 0.15);
    color: var(--neon-purple);
    border: 1px solid rgba(124, 58, 237, 0.3);
}

.plan-card-cyber h3 {
    font-size: 18px;
    font-weight: 800;
    margin-bottom: 8px;
}

.plan-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.plan-progress-visual {
    display: flex;
    align-items: center;
    gap: 0;
    margin-bottom: 12px;
}

.plan-step {
    width: 28px; height: 28px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    border: 2px solid rgba(255, 255, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.plan-step.done {
    background: rgba(0, 240, 255, 0.2);
    border-color: var(--neon-cyan);
    color: var(--neon-cyan);
}

.plan-line {
    flex: 1;
    height: 2px;
    background: rgba(255, 255, 255, 0.1);
}

.plan-line.done { background: var(--neon-cyan); }

.plan-stats {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.plan-percent {
    color: var(--neon-cyan);
    font-weight: 700;
}

.btn-plan-start {
    width: 100%;
    padding: 10px;
    background: rgba(0, 240, 255, 0.08);
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: var(--radius-sm);
    color: var(--neon-cyan);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-plan-start:hover {
    background: rgba(0, 240, 255, 0.15);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
}

/* 排行榜 */
.cyber-ranking-section {
    padding: 40px 20px 60px;
    max-width: 1200px;
    margin: 0 auto;
}

.ranking-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.ranking-card-cyber {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.ranking-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    font-size: 16px;
    font-weight: 700;
    color: var(--neon-cyan);
}

.ranking-icon { font-size: 20px; }

.ranking-list { }

.ranking-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    transition: var(--transition);
}

.ranking-item:last-child { border-bottom: none; }
.ranking-item:hover { background: rgba(0, 240, 255, 0.03); }

.rank-num {
    width: 28px; height: 28px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 800;
    flex-shrink: 0;
}

.rank-num.top1 {
    background: linear-gradient(135deg, #ffd700, #ffaa00);
    color: #000;
}

.rank-num.top2 {
    background: linear-gradient(135deg, #c0c0c0, #a0a0a0);
    color: #000;
}

.rank-num.top3 {
    background: linear-gradient(135deg, #cd7f32, #a0522d);
    color: #fff;
}

.rank-num.normal {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-secondary);
}

.rank-info { flex: 1; }

.rank-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
    line-height: 1.3;
}

.rank-extra {
    font-size: 12px;
    color: var(--text-secondary);
}

.rank-value {
    font-size: 14px;
    font-weight: 700;
    color: var(--neon-cyan);
    white-space: nowrap;
}

@media (max-width: 768px) {
    .ranking-container { grid-template-columns: 1fr; }
    .hot-carousel { grid-template-columns: 1fr; }
    .plan-container { grid-template-columns: 1fr; }
}