/* 重置默认样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    display: flex;
    min-height: 100vh;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 0 30px rgba(0, 0, 0, 0.1);
}

/* 左侧边栏 */
.sidebar {
    width: 280px;
    background: linear-gradient(to bottom, #4a5568, #2d3748);
    color: white;
    padding: 20px 0;
    display: flex;
    flex-direction: column;
    box-shadow: 5px 0 15px rgba(0, 0, 0, 0.1);
}

.logo h1 {
    text-align: center;
    padding: 0 20px 20px;
    font-size: 1.8em;
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 20px;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.categories {
    list-style: none;
    flex-grow: 1;
}

.categories li {
    margin: 5px 15px;
}

.categories li a {
    display: block;
    padding: 12px 20px;
    color: #e2e8f0;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.categories li a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.categories li a:hover::before {
    left: 100%;
}

.categories li a:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(5px);
    color: #fff;
}

.categories li.active a {
    background: linear-gradient(45deg, #ff6b6b, #ee5a52);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
}

.user-section {
    padding: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(45deg, #4ecdc4, #44a08d);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.btn-login {
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    transition: transform 0.2s;
}

.btn-login:hover {
    transform: scale(1.05);
}

/* 主内容区域 */
.main-content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #e2e8f0;
}

.header h2 {
    font-size: 1.8em;
    color: #2d3748;
    background: linear-gradient(45deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.search-box {
    display: flex;
    align-items: center;
}

.search-box input {
    padding: 10px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 25px 0 0 25px;
    outline: none;
    width: 250px;
    font-size: 14px;
}

.search-box input:focus {
    border-color: #667eea;
}

.search-box button {
    padding: 10px 15px;
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 0 25px 25px 0;
    cursor: pointer;
    font-size: 16px;
}

.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.game-card {
    background: white;
    border-radius: 15px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    border: 2px solid transparent;
}

.game-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4);
    opacity: 0;
    transition: opacity 0.3s;
}

.game-card:hover::before {
    opacity: 1;
}

.game-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
    border-color: #e2e8f0;
}

.game-icon {
    font-size: 3em;
    margin-bottom: 15px;
    animation: float 3s ease-in-out infinite;
    /* 如果是图片则使用背景样式 */
    display: flex;
    align-items: center;
    justify-content: center;
    width: 220px;
    height: 250px;
    margin-left: auto;
    margin-right: auto;
}

.game-icon img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.game-card h3 {
    font-size: 1.2em;
    margin-bottom: 8px;
    color: #2d3748;
}

.game-card p {
    color: #718096;
    font-size: 0.9em;
    margin-bottom: 10px;
}

.game-rating {
    color: #f6ad55;
    font-size: 0.9em;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
    }
    
    .header {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .search-box input {
        width: 200px;
    }
    
    .games-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 20px;
    }
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.game-card {
    animation: fadeInUp 0.6s ease forwards;
}

.game-card:nth-child(1) { animation-delay: 0.1s; }
.game-card:nth-child(2) { animation-delay: 0.2s; }
.game-card:nth-child(3) { animation-delay: 0.3s; }
.game-card:nth-child(4) { animation-delay: 0.4s; }
.game-card:nth-child(5) { animation-delay: 0.5s; }
.game-card:nth-child(6) { animation-delay: 0.6s; }
.game-card:nth-child(7) { animation-delay: 0.7s; }
.game-card:nth-child(8) { animation-delay: 0.8s; }
.game-card:nth-child(9) { animation-delay: 0.9s; }
.game-card:nth-child(10) { animation-delay: 1.0s; }
.game-card:nth-child(11) { animation-delay: 1.1s; }
.game-card:nth-child(12) { animation-delay: 1.2s; }

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(#667eea, #764ba2);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(#764ba2, #667eea);
}

/* 涟漪效果 */
.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.6);
    transform: scale(0);
    animation: ripple-animation 0.6s linear;
    pointer-events: none;
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}