:root {
    --bg: #eef2f5;
    --panel: #ffffff;
    --panel-soft: #f7f9fb;
    --line: #d9e1e8;
    --text: #22303c;
    --muted: #6b7785;
    --accent: #2d77c7;
    --accent-soft: #e8f1fb;
    --shadow: 0 10px 30px rgba(34, 48, 60, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #f8fafc, var(--bg));
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font: inherit;
}

.site-header,
.page,
.site-footer {
    width: min(1180px, calc(100% - 24px));
    margin: 0 auto;
}

.site-header {
    padding: 16px 0 0;
}

.topbar {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 20px;
    border: 1px solid var(--line);
    border-radius: 14px 14px 0 0;
    background: var(--panel);
}

.brand {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.tagline {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
}

.main-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 2px;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-top: 0;
    border-radius: 0 0 14px 14px;
    background: #f2f6fa;
}

.main-nav a {
    padding: 10px 14px;
    border-radius: 8px;
    color: #405062;
}

.main-nav a:hover {
    background: var(--panel);
    color: var(--accent);
}

.page {
    padding: 18px 0 28px;
}

.hero-card,
.post-item,
.side-card {
    border: 1px solid var(--line);
    background: var(--panel);
    box-shadow: var(--shadow);
}

.hero-card {
    padding: 24px 26px;
    border-radius: 14px;
}

.hero-meta {
    color: var(--accent);
    font-size: 13px;
}

.hero-card h1 {
    margin: 12px 0 10px;
    font-size: clamp(28px, 4vw, 40px);
    line-height: 1.2;
}

.hero-card p {
    margin: 0;
    line-height: 1.9;
    color: var(--muted);
}

.hero-footer {
    display: flex;
    gap: 14px;
    margin-top: 16px;
    color: #4d5e70;
    font-size: 14px;
}

.layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 18px;
    margin-top: 18px;
}

.section-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.section-title h2,
.side-card h3,
.post-item h3 {
    margin: 0;
}

.section-title h2 {
    font-size: 24px;
}

.note-switch {
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--panel);
    color: #4b5d6f;
    cursor: pointer;
}

.rolling-note {
    margin: 10px 0 16px;
    color: var(--accent);
    font-size: 14px;
}

.post-list {
    display: grid;
    gap: 14px;
}

.post-item {
    display: grid;
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 16px;
    padding: 16px;
    border-radius: 12px;
}

.thumb {
    display: grid;
    place-items: center;
    min-height: 92px;
    border-radius: 10px;
    background: linear-gradient(135deg, #dce9f7, #eef4fa);
    color: var(--accent);
    font-size: 28px;
    font-weight: 700;
}

.post-head,
.post-foot {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
    color: var(--muted);
    font-size: 13px;
}

.post-category {
    padding: 3px 8px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
}

.post-item h3 {
    margin-top: 10px;
    font-size: 22px;
    line-height: 1.3;
}

.post-item p {
    margin: 10px 0 0;
    line-height: 1.8;
    color: var(--muted);
}

.post-foot {
    justify-content: space-between;
    margin-top: 14px;
}

.text-link {
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--accent);
    cursor: pointer;
}

.sidebar {
    display: grid;
    gap: 14px;
    align-content: start;
}

.side-card {
    padding: 18px 18px 16px;
    border-radius: 12px;
}

.side-card p {
    margin: 12px 0 0;
    line-height: 1.8;
    color: var(--muted);
}

.category-list,
.hot-list {
    margin: 14px 0 0;
    padding: 0;
}

.category-list {
    list-style: none;
}

.category-list li,
.hot-list li {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px dashed var(--line);
}

.category-list li:last-child,
.hot-list li:last-child {
    border-bottom: 0;
}

.category-list em {
    font-style: normal;
    color: var(--muted);
}

.hot-list {
    padding-left: 18px;
}

.hot-list li {
    display: list-item;
    color: var(--text);
    line-height: 1.7;
}

.site-footer {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 0 0 30px;
    color: var(--muted);
    font-size: 14px;
}

@media (max-width: 900px) {
    .layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .site-header,
    .page,
    .site-footer {
        width: min(100% - 16px, 1180px);
    }

    .topbar,
    .site-footer,
    .section-title {
        flex-direction: column;
        align-items: flex-start;
    }

    .post-item {
        grid-template-columns: 1fr;
    }

    .thumb {
        min-height: 72px;
    }
}