/* 内容页样式(/about /caseboard /writing/* /open-source /manxiu /404)
   与 3D 首页同一视觉语言:冷灰空间 + 墨蓝强调,系统字体栈(不依赖外部字体) */
:root {
    --bg: #e3e2dd;
    --bg-raised: #f2f1ec;
    --ink: #23272d;
    --ink-soft: #5a6069;
    --accent: #24466f;
    --accent-soft: #3d648f;
    --line: #cfcec7;
    --shadow: 0 18px 40px rgba(35, 39, 45, 0.08);
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #1d2126;
        --bg-raised: #262b32;
        --ink: #e6e4de;
        --ink-soft: #9aa0a8;
        --accent: #8fb0d6;
        --accent-soft: #6f92ba;
        --line: #363c44;
        --shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
    }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.9;
    letter-spacing: 0.01em;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 0.25em; }
img { max-width: 100%; height: auto; display: block; }

/* 头部 */
.page-header {
    max-width: 46rem;
    margin: 0 auto;
    padding: 1.4rem 1.4rem 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 600;
    color: var(--ink);
}
.brand:hover { text-decoration: none; }
.brand-mark {
    display: inline-grid;
    place-items: center;
    width: 2rem;
    height: 2rem;
    border-radius: 0.55rem;
    background: var(--accent);
    color: #f2f3f0;
    font-size: 0.95rem;
}
.page-nav { display: flex; flex-wrap: wrap; gap: 0.2rem 1.1rem; font-size: 0.92rem; }
.page-nav a { color: var(--ink-soft); }
.page-nav a[aria-current="page"] { color: var(--accent); font-weight: 600; }

/* 正文 */
.page-main {
    max-width: 46rem;
    margin: 0 auto;
    padding: 2.2rem 1.4rem 3rem;
}
h1 {
    font-size: 1.7rem;
    line-height: 1.45;
    letter-spacing: 0.02em;
    margin: 0.4rem 0 0.9rem;
}
.lede { font-size: 1.06rem; color: var(--ink-soft); margin: 0 0 1.6rem; }
h2 {
    font-size: 1.22rem;
    margin: 2.6rem 0 0.8rem;
    padding-top: 1.4rem;
    border-top: 1px solid var(--line);
    letter-spacing: 0.03em;
}
h3 { font-size: 1.02rem; margin: 1.4rem 0 0.5rem; }
p { margin: 0 0 1.05rem; }
ul, ol { padding-left: 1.4rem; margin: 0 0 1.2rem; }
li { margin-bottom: 0.45rem; }
blockquote {
    margin: 1.4rem 0;
    padding: 0.15rem 1.2rem;
    border-left: 3px solid var(--accent);
    background: var(--bg-raised);
    border-radius: 0 0.5rem 0.5rem 0;
    color: var(--ink-soft);
}
hr {
    border: none;
    height: 1px;
    background: var(--line);
    margin: 2.2rem auto;
    width: 5rem;
}
time { color: inherit; }

/* 文章 */
.article-header h1 { margin-bottom: 1.1rem; }
.article-cover img { border-radius: 0.8rem; box-shadow: var(--shadow); }
.article-cover { margin: 0 0 2rem; }
.article-footer {
    margin-top: 2.8rem;
    padding-top: 1.4rem;
    border-top: 1px solid var(--line);
    font-size: 0.94rem;
    color: var(--ink-soft);
}

/* 卡片列表(文章索引) */
.card-list { display: grid; gap: 1.3rem; margin: 1.4rem 0 2rem; }
.card {
    display: grid;
    grid-template-columns: 12rem 1fr;
    gap: 1.1rem;
    background: var(--bg-raised);
    border: 1px solid var(--line);
    border-radius: 0.9rem;
    overflow: hidden;
}
.card-cover img { width: 100%; height: 100%; object-fit: cover; }
.card-body { padding: 0.9rem 1.1rem 0.9rem 0; }
.card-body h3 { margin: 0.15rem 0 0.4rem; line-height: 1.5; }
.card-body h3 a { color: var(--ink); }
.card-body p { margin: 0; font-size: 0.9rem; color: var(--ink-soft); }
.card-meta {
    font-size: 0.82rem;
    color: var(--ink-soft);
    display: flex;
    gap: 0.7rem;
    align-items: baseline;
    margin: 0 0 0.2rem;
}
.card-meta em { font-style: normal; color: var(--accent-soft); }
@media (max-width: 620px) {
    .card { grid-template-columns: 1fr; }
    .card-body { padding: 0 1.1rem 1rem; }
}

.wechat-list { list-style: none; padding: 0; }
.wechat-list li {
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: baseline;
    flex-wrap: wrap;
}
.wechat-list .card-meta { margin: 0; white-space: nowrap; }

/* 组件 */
.actions { display: flex; flex-wrap: wrap; gap: 0.7rem; margin: 1.4rem 0; }
.button {
    display: inline-block;
    padding: 0.55rem 1.15rem;
    border-radius: 0.65rem;
    background: var(--accent);
    color: #f2f3f0;
    font-size: 0.94rem;
    border: 1px solid transparent;
}
.button:hover { text-decoration: none; opacity: 0.92; }
.button.ghost {
    background: transparent;
    color: var(--accent);
    border-color: var(--accent-soft);
}
.shot img { border-radius: 0.9rem; box-shadow: var(--shadow); }
.shot { margin: 1.6rem 0; }
.fineprint { font-size: 0.85rem; color: var(--ink-soft); }
.timeline { list-style: none; padding: 0; }
.timeline li {
    display: grid;
    grid-template-columns: 5.2rem 1fr;
    gap: 0.9rem;
    padding: 0.45rem 0;
}
.timeline time { color: var(--accent-soft); font-weight: 600; font-variant-numeric: tabular-nums; }
.pursuit-list { list-style: none; padding: 0; }
.pursuit-list li {
    padding: 0.8rem 1rem;
    background: var(--bg-raised);
    border: 1px solid var(--line);
    border-radius: 0.8rem;
    margin-bottom: 0.7rem;
}
.repo { margin-bottom: 1rem; }
.repo h2 { display: flex; align-items: baseline; gap: 0.7rem; flex-wrap: wrap; }
.repo-meta {
    font-size: 0.74rem;
    color: var(--accent-soft);
    border: 1px solid var(--accent-soft);
    border-radius: 99px;
    padding: 0.05rem 0.6rem;
    letter-spacing: 0.05em;
    white-space: nowrap;
}
.repo-tagline { color: var(--ink-soft); }

/* 尾部 */
.page-footer {
    max-width: 46rem;
    margin: 0 auto;
    padding: 1.6rem 1.4rem 2.6rem;
    border-top: 1px solid var(--line);
    font-size: 0.88rem;
    color: var(--ink-soft);
}
.footer-identity { margin: 0 0 0.6rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 0.3rem 1.2rem; margin-bottom: 0.6rem; }
.footer-note { margin: 0; font-size: 0.82rem; }