/* ===== 优汇枸博客 全局样式 ===== */
:root {
  --bg: #f6f8fb;
  --bg-card: #ffffff;
  --bg-nav: rgba(255, 255, 255, 0.85);
  --text: #1f2937;
  --text-sub: #6b7280;
  --primary: #4f6ef7;
  --primary-dark: #3b52d4;
  --accent: #10b981;
  --border: #e5e7eb;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 4px 14px rgba(0, 0, 0, 0.05);
  --radius: 12px;
  --code-bg: #0f172a;
}
[data-theme="dark"] {
  --bg: #0f1420;
  --bg-card: #1a2130;
  --bg-nav: rgba(15, 20, 32, 0.85);
  --text: #e5e9f0;
  --text-sub: #94a3b8;
  --border: #2a3448;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 4px 14px rgba(0, 0, 0, 0.3);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  overflow-x: hidden; /* 防止任何元素把页面撑出横向滚动 */
  transition: background 0.3s, color 0.3s;
}
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; }
/* 全屏宽度布局：页面撑满浏览器宽度 */
.container { width: 100%; max-width: 100%; margin: 0 auto; padding: 0 24px; }

/* ===== 顶部导航 ===== */
.navbar {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.logo { font-size: 22px; font-weight: 800; color: var(--text); letter-spacing: 1px; }
.logo .dot { color: var(--primary); }
.nav-links { display: flex; align-items: center; gap: 24px; }
.nav-links a { color: var(--text-sub); font-size: 15px; font-weight: 500; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.theme-btn {
  background: none; border: 1px solid var(--border); border-radius: 8px;
  padding: 4px 10px; cursor: pointer; color: var(--text-sub); font-size: 15px;
}
.theme-btn:hover { color: var(--primary); border-color: var(--primary); }

/* ===== 英雄区 ===== */
.hero {
  text-align: center; padding: 64px 20px 40px;
  background: linear-gradient(160deg, rgba(79, 110, 247, 0.10), transparent 60%);
}
.hero h1 { font-size: 42px; font-weight: 800; letter-spacing: 2px; }
.hero h1 .dot { color: var(--primary); }
.hero .slogan { margin-top: 12px; font-size: 17px; color: var(--text-sub); }
.hero .intro { max-width: 640px; margin: 16px auto 0; color: var(--text-sub); font-size: 15px; }
.hero .tags-cloud { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.hero .tags-cloud a {
  padding: 4px 14px; border-radius: 999px; font-size: 13px;
  background: var(--bg-card); border: 1px solid var(--border); color: var(--text-sub);
}
.hero .tags-cloud a:hover { border-color: var(--primary); color: var(--primary); }

/* ===== 公告栏 ===== */
.announcement {
  margin: 8px auto 0; padding: 10px 20px;
  background: linear-gradient(90deg, rgba(79,110,247,.12), rgba(16,185,129,.10));
  border: 1px solid var(--border); border-radius: var(--radius);
  color: var(--text); font-size: 14px; text-align: center;
}

/* ===== 布局 ===== */
.layout { display: flex; gap: 28px; margin: 28px auto 60px; align-items: flex-start; }
.main { flex: 1; min-width: 0; }
.sidebar { width: 300px; flex-shrink: 0; position: sticky; top: 80px; }

/* ===== 文章卡片 ===== */
.post-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px 26px; margin-bottom: 18px;
  box-shadow: var(--shadow); transition: transform 0.2s, box-shadow 0.2s;
}
.post-card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.08); }
.post-card .meta { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--text-sub); flex-wrap: wrap; }
.post-card .meta .cat { color: var(--primary); font-weight: 600; }
.post-card .meta .badge-top {
  background: var(--primary); color: #fff; font-size: 12px;
  padding: 1px 8px; border-radius: 6px;
}
.post-card h2 { font-size: 21px; margin: 10px 0 8px; }
.post-card h2 a { color: var(--text); }
.post-card h2 a:hover { color: var(--primary); }
.post-card .summary { color: var(--text-sub); font-size: 14.5px; }
.post-card .foot { display: flex; justify-content: space-between; align-items: center; margin-top: 14px; }
.post-card .stats { font-size: 13px; color: var(--text-sub); display: flex; gap: 14px; }
.post-card .tags { display: flex; gap: 6px; flex-wrap: wrap; }
.post-card .tags span {
  font-size: 12px; padding: 1px 10px; border-radius: 999px;
  background: rgba(79,110,247,.08); color: var(--primary);
}

/* ===== 分页 ===== */
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 28px; }
.pagination button, .pagination span {
  min-width: 38px; padding: 6px 12px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg-card); color: var(--text);
  cursor: pointer; font-size: 14px;
}
.pagination button:hover:not(:disabled) { border-color: var(--primary); color: var(--primary); }
.pagination button:disabled { opacity: 0.4; cursor: not-allowed; }
.pagination .current { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ===== 侧边栏 ===== */
.widget {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; margin-bottom: 18px;
  box-shadow: var(--shadow);
}
.widget h3 { font-size: 15px; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 1px solid var(--border); }
.widget .cat-item { display: flex; justify-content: space-between; padding: 7px 2px; font-size: 14px; color: var(--text); }
.widget .cat-item:hover { color: var(--primary); }
.widget .cat-item .num { color: var(--text-sub); font-size: 13px; }
.widget .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.widget .tag-cloud a {
  font-size: 13px; padding: 3px 12px; border-radius: 999px;
  background: var(--bg); border: 1px solid var(--border); color: var(--text-sub);
}
.widget .tag-cloud a:hover { color: var(--primary); border-color: var(--primary); }
.search-box { display: flex; gap: 8px; }
.search-box input {
  flex: 1; padding: 9px 14px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font-size: 14px; outline: none;
}
.search-box input:focus { border-color: var(--primary); }
.search-box button {
  padding: 0 16px; border: none; border-radius: 8px; background: var(--primary);
  color: #fff; cursor: pointer; font-size: 14px;
}

/* ===== 文章详情 ===== */
.article {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 40px 44px; box-shadow: var(--shadow);
}
.article h1 { font-size: 30px; line-height: 1.4; margin-bottom: 14px; }
.article .meta { display: flex; gap: 18px; color: var(--text-sub); font-size: 13.5px; flex-wrap: wrap; padding-bottom: 20px; border-bottom: 1px solid var(--border); margin-bottom: 26px; }
.article .content { font-size: 16px; }
.article .content h2 { font-size: 23px; margin: 32px 0 14px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.article .content h3 { font-size: 19px; margin: 26px 0 10px; }
.article .content p { margin: 12px 0; }
.article .content ul, .article .content ol { margin: 12px 0 12px 24px; }
.article .content blockquote {
  margin: 16px 0; padding: 12px 18px; border-left: 4px solid var(--primary);
  background: rgba(79, 110, 247, 0.06); border-radius: 0 8px 8px 0; color: var(--text-sub);
}
.article .content code {
  background: rgba(79,110,247,.1); color: var(--primary); padding: 2px 6px; border-radius: 5px; font-size: 0.9em;
}
.article .content pre {
  background: var(--code-bg); color: #e2e8f0; padding: 18px 20px; border-radius: 10px;
  overflow-x: auto; margin: 16px 0; font-size: 14px; line-height: 1.6;
}
.article .content pre code { background: none; color: inherit; padding: 0; font-size: inherit; }
.article .content table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.article .content th, .article .content td { border: 1px solid var(--border); padding: 10px 14px; font-size: 14.5px; }
.article .content th { background: var(--bg); }
.article .action-bar { display: flex; gap: 12px; margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--border); }
.btn-like {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 22px;
  border: 1px solid var(--border); border-radius: 999px; background: var(--bg-card);
  color: var(--text); cursor: pointer; font-size: 14px;
}
.btn-like:hover { border-color: var(--primary); color: var(--primary); }
.btn-like.liked { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ===== 评论 ===== */
.comments { margin-top: 26px; }
.comments h2 { font-size: 20px; margin-bottom: 18px; }
.comment-form { display: flex; gap: 10px; margin-bottom: 24px; }
.comment-form textarea {
  flex: 1; min-height: 80px; padding: 12px 14px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
  font-size: 14.5px; resize: vertical; outline: none; font-family: inherit;
}
.comment-form textarea:focus { border-color: var(--primary); }
.comment-form .submit {
  align-self: flex-end; padding: 10px 24px; border: none; border-radius: 10px;
  background: var(--primary); color: #fff; cursor: pointer; font-size: 14px;
}
.comment-item { padding: 16px 0; border-bottom: 1px solid var(--border); }
.comment-item .c-head { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.comment-item .c-avatar {
  width: 34px; height: 34px; border-radius: 50%; background: var(--primary);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 600;
}
.comment-item .c-name { font-weight: 600; font-size: 14px; }
.comment-item .c-time { color: var(--text-sub); font-size: 12.5px; }
.comment-item .c-content { font-size: 14.5px; }
.comment-item .c-reply { font-size: 13px; cursor: pointer; color: var(--text-sub); margin-top: 6px; display: inline-block; }
.comment-item .c-reply:hover { color: var(--primary); }
.comment-item .children { margin-left: 44px; margin-top: 12px; }
.comment-item .children .comment-item { border-bottom: none; background: var(--bg); border-radius: 10px; padding: 12px 14px; margin-bottom: 8px; }
.comment-empty { color: var(--text-sub); text-align: center; padding: 30px 0; font-size: 14px; }
.comment-tip { color: var(--text-sub); font-size: 13px; margin-bottom: 10px; }
.comment-tip a { color: var(--primary); }

/* ===== 关于页 ===== */
.about-wrap { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 40px 44px; box-shadow: var(--shadow); margin: 28px auto 60px; }
.about-wrap .content { max-width: 900px; margin: 0 auto; }
.about-wrap .content h2 { font-size: 23px; margin: 28px 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.about-wrap .content p { margin: 10px 0; color: var(--text); }
.about-wrap .content ul { margin: 10px 0 10px 24px; }
.about-wrap .content blockquote { border-left: 4px solid var(--primary); padding: 10px 16px; background: rgba(79,110,247,.06); border-radius: 0 8px 8px 0; margin: 14px 0; }

/* ===== 页脚 ===== */
.footer { border-top: 1px solid var(--border); padding: 26px 0; text-align: center; color: var(--text-sub); font-size: 13.5px; }
.footer .icp { margin-top: 8px; font-size: 12.5px; }
.footer .icp a { color: var(--text-sub); }
.footer .icp a:hover { color: var(--primary); }

/* ===== 空状态 / 加载 ===== */
.empty { text-align: center; color: var(--text-sub); padding: 60px 0; }
.loading { text-align: center; color: var(--text-sub); padding: 40px 0; }
.spin {
  display: inline-block; width: 22px; height: 22px; border: 3px solid var(--border);
  border-top-color: var(--primary); border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.toast {
  position: fixed; top: 74px; left: 50%; transform: translateX(-50%);
  background: #111827; color: #fff; padding: 10px 22px; border-radius: 10px;
  font-size: 14px; z-index: 999; opacity: 0; transition: opacity 0.3s; pointer-events: none;
}
.toast.show { opacity: 1; }
.toast.error { background: #dc2626; }

/* ===== 响应式（平板 / 手机） ===== */
@media (max-width: 860px) {
  .layout { flex-direction: column; }
  .sidebar { width: 100%; position: static; }
  .hero { padding: 44px 16px 30px; }
  .hero h1 { font-size: 32px; }
  .article, .about-wrap { padding: 24px 20px; }
  .nav-links { gap: 12px; }
  .nav-links a { font-size: 14px; }
  .post-card { padding: 18px 16px; }
  .post-card h2 { font-size: 19px; }
  .post-card .foot { flex-wrap: wrap; gap: 8px; }
  .pagination { flex-wrap: wrap; }
  /* 表格/代码块防止撑破屏幕 */
  .article .content table { display: block; overflow-x: auto; white-space: nowrap; }
  .widget { padding: 16px; }
}

/* 手机小屏（≤480px） */
@media (max-width: 480px) {
  .container { padding: 0 14px; }
  .hero h1 { font-size: 26px; }
  .hero .slogan { font-size: 15px; }
  .article h1 { font-size: 24px; }
  .article .meta { gap: 10px; font-size: 12.5px; }
  .post-card .meta { font-size: 12px; gap: 8px; }
  .logo { font-size: 19px; }
  .nav-links { gap: 10px; }
  .theme-btn { padding: 3px 8px; font-size: 13px; }
  .article, .about-wrap { padding: 18px 14px; }
  .action-bar { flex-wrap: wrap; }
}