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

/* 页面整体 */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: linear-gradient(135deg, #1e1e2f, #2b5876);
    color: #f5f5f5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px 20px;
}

/* 顶部导航 */
.nav {
    max-width: 860px;
    width: 90%;
    margin-bottom: 24px;
}

.nav a {
    color: #00c6ff;
    text-decoration: none;
    font-size: 14px;
    opacity: 0.8;
    transition: opacity 0.2s;
    background: none;
    padding: 0;
    border-radius: 0;
    display: inline;
    margin: 0;
    box-shadow: none;
    transform: none;
}

.nav a:hover {
    opacity: 1;
    transform: none;
    box-shadow: none;
}

/* 主内容卡片 */
.container {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 48px 56px;
    max-width: 860px;
    width: 90%;
    backdrop-filter: blur(10px);
    text-align: left;
}

/* 标题 */
h1 {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: 1px;
    color: #fff;
    margin-bottom: 16px;
    display: block;
}

h2 {
    font-size: 22px;
    color: #e0e0e0;
    margin-top: 32px;
    margin-bottom: 14px;
}

h3 {
    font-size: 17px;
    color: #00c6ff;
    margin-top: 28px;
    margin-bottom: 12px;
    font-weight: 600;
}

/* 正文 */
p {
    font-size: 15px;
    color: #ccc;
    line-height: 1.8;
    margin-bottom: 14px;
    display: block;
}

strong {
    color: #fff;
}

/* 链接按钮 */
a {
    display: inline-block;
    padding: 11px 24px;
    background: linear-gradient(135deg, #00c6ff, #0072ff);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-size: 15px;
    margin: 8px 8px 0 0;
}

a:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

a:active {
    transform: scale(0.97);
}

/* 次级按钮 */
a.secondary {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

/* 列表 */
ul, ol {
    padding-left: 22px;
    margin-bottom: 14px;
}

li {
    font-size: 15px;
    color: #ccc;
    line-height: 1.8;
    margin-bottom: 4px;
}

/* 代码块 */
pre {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    padding: 18px 22px;
    margin: 8px 0 24px;
    overflow-x: auto;
}

pre code {
    font-family: "Fira Code", "Cascadia Code", "Source Code Pro", monospace;
    font-size: 13.5px;
    color: #7dd3fc;
    line-height: 1.7;
    background: none;
    padding: 0;
}

/* 行内代码 */
code {
    background: rgba(0, 198, 255, 0.12);
    color: #7dd3fc;
    padding: 2px 7px;
    border-radius: 4px;
    font-size: 13px;
    font-family: "Fira Code", monospace;
}

/* 小屏适配 */
@media (max-width: 640px) {
    .container {
        padding: 28px 22px;
    }

    h1 {
        font-size: 24px;
    }

    p {
        font-size: 14px;
    }
}