* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ec 100%);
    color: #333;
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
a {
    color: #2c6bb3;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

/* 导航 */
.nav {
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(8px);
    padding: 1rem 2rem;
    border-bottom: 1px solid rgba(0,0,0,0.06);
}
.nav-inner {
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}
.nav .logo {
    font-weight: 600;
    font-size: 1.1rem;
    color: #1a1a1a;
}
.nav .logo:hover {
    text-decoration: none;
}
.nav a {
    color: #555;
    font-size: 0.95rem;
}
.nav a:hover {
    color: #1a1a1a;
}

/* 主内容区 */
.main {
    flex: 1;
    max-width: 720px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 3rem;
    width: 100%;
}
h1 {
    font-size: 1.75rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 1rem;
}
h2 {
    font-size: 1.35rem;
    font-weight: 600;
    color: #222;
    margin: 1.8rem 0 0.8rem;
}
h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 1.2rem 0 0.5rem;
}
p {
    margin-bottom: 1rem;
    color: #444;
}
ul {
    margin: 0 0 1rem 1.5rem;
}
li {
    margin-bottom: 0.35rem;
}
code {
    font-size: 0.9em;
    background: rgba(0,0,0,0.06);
    padding: 0.15em 0.4em;
    border-radius: 4px;
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 1.5rem;
    font-size: 0.85rem;
    color: #888;
    border-top: 1px solid rgba(0,0,0,0.06);
}
.footer a {
    color: #666;
}
.footer a:hover {
    color: #333;
}

/* 笔记列表 */
.notes-list {
    list-style: none;
    margin: 0;
    padding: 0;
}
.notes-list li {
    margin: 0 0 0.8rem;
    padding: 1rem 1.2rem;
    background: rgba(255,255,255,0.7);
    border-radius: 8px;
    border: 1px solid rgba(0,0,0,0.06);
}
.notes-list a {
    font-weight: 500;
    color: #1a1a1a;
}
.notes-list .date {
    font-size: 0.85rem;
    color: #888;
    margin-top: 0.3rem;
}

/* 首页简介卡片 */
.intro-card {
    background: rgba(255,255,255,0.8);
    border-radius: 12px;
    padding: 2rem;
    margin: 1.5rem 0;
    border: 1px solid rgba(0,0,0,0.06);
}
.intro-card p:last-child {
    margin-bottom: 0;
}

/* 关于页 */
.about-meta {
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

/* 文章内页 */
.article-meta {
    font-size: 0.9rem;
    color: #888;
    margin-bottom: 1.5rem;
}
.article-meta a {
    color: #666;
}
.content p:last-child {
    margin-bottom: 0;
}