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

/* 全局样式 */
:root {
    /* 定义主题颜色（参考需求文档第53-57行） */
    --color-ink: #000000;
    --color-paper: #FFFFFF;
    --color-red: #D40000;
    --color-blue: #88B0C8;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
    line-height: 1.6;
    background-color: var(--color-paper);
    color: var(--color-ink);
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
.header {
    background-color: var(--color-paper);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding: 1rem 0;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    color: var(--color-red);
    font-size: 1.8rem;
}

.logo a {
    color: var(--color-red);
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.logo a:hover {
    opacity: 0.8;
}

/* 导航样式 */
.nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav a {
    text-decoration: none;
    color: var(--color-ink);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.nav a:hover, .nav a.active {
    background-color: var(--color-red);
    color: var(--color-paper);
}

/* 主要内容区样式 */
.main {
    padding: 3rem 0;
}

/* 游戏卡片网格 */
.game-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.game-card {
    background-color: var(--color-paper);
    border: 2px solid var(--color-ink);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s ease;
}

.game-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-red);
}

.game-card p {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.game-card:hover {
    transform: translateY(-5px);
}

/* 按钮样式 */
.btn {
    background-color: var(--color-red);
    color: var(--color-paper);
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    margin-top: 1rem;
    transition: background-color 0.3s ease;
    display: inline-block;
    text-decoration: none;
}

.btn:hover {
    background-color: #b30000;
}

.btn[disabled] {
    background-color: #ccc;
    cursor: not-allowed;
}

/* 页脚样式 */
.footer {
    background-color: var(--color-ink);
    color: var(--color-paper);
    padding: 1rem 0;
    text-align: center;
    position: fixed;
    bottom: 0;
    width: 100%;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        text-align: center;
    }

    .nav ul {
        margin-top: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }
}