:root{
  --bg:#D7DEEA; --card:#F1F4F9; --line:#D2D9E7;
  --txt:#1A2333; --muted:#4A5568; --muted2:#7E8DA3;
  --acc:#2F86F6; --acc-bg:#DCE9FB;
  --green:#16A34A; --green-bg:#DDF2E3;
  --gray-bg:#E4E9F2;
  --red:#DC2626; --red-bg:#F8E2E2;
  --shadow:0 1px 3px rgba(26,35,51,.07);
  --radius:16px;
}
[data-theme="dark"]{
  --bg:#0C121D; --card:#141E2E; --line:#223148;
  --txt:#E9EFF8; --muted:#A3B1C6; --muted2:#6E7E95;
  --acc:#5B9DFF; --acc-bg:rgba(91,157,255,.14);
  --green:#4ADE80; --green-bg:rgba(74,222,128,.13);
  --gray-bg:#1B2740;
  --red:#F87171; --red-bg:rgba(248,113,113,.13);
  --shadow:0 1px 4px rgba(0,0,0,.35);
}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg);color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  line-height:1.7;font-size:15px;-webkit-font-smoothing:antialiased;transition:background .25s,color .25s}
a{color:var(--acc);text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
/* ===== 顶栏 ===== */
header.site{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.nav{display:flex;align-items:center;height:60px;gap:36px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px;color:var(--txt)}
.logo:hover{text-decoration:none}
.logo .mark{width:32px;height:32px;border-radius:9px;background:var(--acc);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:800}
.nav .links{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav .links a{color:var(--muted);font-size:14px;padding:8px 16px;border-radius:9px;position:relative}
.nav .links a:hover{color:var(--txt);text-decoration:none;background:var(--gray-bg)}
.nav .links a.on{color:var(--acc);font-weight:600}
.nav .links a.on::after{content:"";position:absolute;left:16px;right:16px;bottom:2px;height:2.5px;
  border-radius:2px;background:var(--acc)}
.tbtn{border:1px solid var(--line);background:var(--card);border-radius:9px;font-size:16px;
  width:36px;height:36px;cursor:pointer;margin-left:6px;color:var(--txt)}
.tbtn:hover{border-color:var(--acc)}
/* ===== Hero ===== */
.hero{background:var(--card);border-bottom:1px solid var(--line);padding:56px 0 48px;text-align:center}
.hero .wrap{max-width:760px}
.badge{display:inline-block;font-size:12px;color:var(--acc);background:var(--acc-bg);
  border-radius:999px;padding:4px 16px;letter-spacing:2px;margin-bottom:18px;font-weight:600}
.hero h1{font-size:34px;font-weight:800;letter-spacing:1px;margin-bottom:12px}
.hero p{color:var(--muted);font-size:15px}
.btns{display:flex;gap:12px;justify-content:center;margin-top:28px;flex-wrap:wrap}
.btn{display:inline-block;font-size:14.5px;font-weight:600;border-radius:11px;padding:12px 32px;transition:.18s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn.pri{background:var(--acc);color:#fff;box-shadow:0 4px 14px rgba(47,134,246,.35)}
.btn.pri:hover{filter:brightness(1.08)}
.btn.sec{border:1px solid var(--line);color:var(--txt);background:var(--card)}
.btn.sec:hover{border-color:var(--acc);color:var(--acc)}
.stats{display:flex;gap:44px;justify-content:center;margin-top:36px;flex-wrap:wrap}
.stat b{display:block;font-size:24px;font-weight:800;color:var(--txt)}
.stat span{font-size:12.5px;color:var(--muted2)}
/* ===== 首页工具入口 ===== */
.feature{position:relative;overflow:hidden;display:flex;align-items:center;gap:20px;
  border-radius:var(--radius);padding:26px 30px;margin:32px 0 8px;border:none;color:#fff;
  background:linear-gradient(120deg,#2F86F6,#7C5CFF,#2F86F6);background-size:220% 220%;
  animation:featFlow 8s ease-in-out infinite;
  box-shadow:0 8px 28px rgba(47,134,246,.35);transition:transform .2s,box-shadow .2s}
@keyframes featFlow{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
.feature::after{content:"";position:absolute;top:0;left:-80%;width:55%;height:100%;pointer-events:none;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.35),transparent);
  transform:skewX(-20deg);animation:featShine 4.5s ease-in-out infinite}
@keyframes featShine{0%{left:-80%}55%,100%{left:135%}}
.feature:hover{transform:translateY(-2px);box-shadow:0 12px 36px rgba(47,134,246,.5);text-decoration:none}
.feature .fic{width:52px;height:52px;flex:none;border-radius:14px;background:rgba(255,255,255,.18);
  display:flex;align-items:center;justify-content:center;font-size:26px}
.feature h2{font-size:18px;font-weight:700;margin-bottom:4px;color:#fff}
.feature p{color:rgba(255,255,255,.85);font-size:13.5px}
.feature .go{margin-left:auto;flex:none;color:#fff;font-weight:600;font-size:14px;
  background:rgba(255,255,255,.2);padding:8px 18px;border-radius:999px}
@media (prefers-reduced-motion:reduce){.feature,.feature::after{animation:none}}
/* ===== 文章卡片 ===== */
.sect{display:flex;align-items:baseline;justify-content:space-between;margin:40px 0 4px}
.sect h2{font-size:19px;font-weight:700}
.sect a{font-size:13.5px}
.cards{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:18px 0 30px}
@media(max-width:680px){.cards{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;
  box-shadow:var(--shadow);transition:.18s}
.card:hover{border-color:var(--acc);box-shadow:0 6px 22px rgba(47,134,246,.10);transform:translateY(-2px)}
.card:hover a{text-decoration:none}
.card .meta{font-size:12px;color:var(--muted2);margin-bottom:10px;display:flex;align-items:center;gap:8px}
.tag{display:inline-block;background:var(--acc-bg);color:var(--acc);border-radius:7px;
  padding:2px 11px;font-size:12px;font-weight:600}
.card h2{font-size:16.5px;font-weight:600;line-height:1.55;margin-bottom:8px;color:var(--txt)}
.card p{font-size:13.5px;color:var(--muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
/* ===== 工具页 ===== */
.ptools{padding:40px 0 70px}
.ptools h1{font-size:26px;font-weight:800;margin-bottom:6px}
.ptools .sub{color:var(--muted);font-size:14px;margin-bottom:22px}
.fbar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:26px;align-items:center}
.fbar .flabel{font-size:13px;color:var(--muted2);margin-right:2px}
.fpill{border:1px solid transparent;cursor:pointer;font-size:13.5px;background:var(--gray-bg);color:var(--muted);
  border-radius:999px;padding:8px 20px;transition:.15s;font-family:inherit}
.fpill:hover{border-color:var(--acc)}
.fpill.on{background:var(--acc);color:#fff;font-weight:600;border-color:var(--acc)}
.tgrid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px}
@media(max-width:960px){.tgrid{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.tgrid{grid-template-columns:1fr}}
.tool{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;
  box-shadow:var(--shadow);transition:.18s;display:flex;flex-direction:column}
.tool:hover{border-color:var(--acc);box-shadow:0 8px 26px rgba(47,134,246,.12);transform:translateY(-2px)}
.trow{display:flex;gap:14px;align-items:flex-start;margin-bottom:10px}
.ticon{width:52px;height:52px;flex:none;border-radius:13px;background:linear-gradient(135deg,#2F86F6,#6aa8ff);
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:800}
.ttitle b{display:block;font-size:16px;font-weight:600;line-height:1.4;color:var(--txt)}
.ctag{display:inline-block;background:var(--acc-bg);color:var(--acc);border-radius:6px;
  padding:1px 9px;font-size:11px;font-weight:600;margin-top:5px}
.tdesc{font-size:13px;color:var(--muted);line-height:1.7;margin:2px 0 12px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tpills{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:14px}
.pill{font-size:11px;border-radius:999px;padding:3px 11px;font-weight:500}
.pill.blue{background:var(--acc-bg);color:var(--acc)}
.pill.green{background:var(--green-bg);color:var(--green)}
.pill.gray{background:var(--gray-bg);color:var(--muted)}
.pill.red{background:var(--red-bg);color:var(--red)}
.tfoot{margin-top:auto;text-align:right}
.dlbtn{display:inline-block;font-size:13px;font-weight:600;color:var(--acc);border:1px solid var(--acc);
  border-radius:999px;padding:6px 18px;background:transparent;transition:.15s}
.dlbtn:hover{background:var(--acc);color:#fff;text-decoration:none}
.tutbtn{display:inline-block;margin-left:8px;font-size:13px;font-weight:600;color:var(--muted);
  border:1px solid var(--line);border-radius:999px;padding:6px 16px;background:transparent;transition:.15s}
.tutbtn:hover{border-color:var(--acc);color:var(--acc);text-decoration:none}
/* ===== 文章页 ===== */
article.post{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:44px 52px;margin:32px 0;box-shadow:var(--shadow)}
@media(max-width:680px){article.post{padding:28px 22px}}
.post .meta{color:var(--muted2);font-size:13px;margin:12px 0 26px;display:flex;align-items:center;gap:8px}
.post h1{font-size:27px;line-height:1.45;font-weight:800}
.post h2{font-size:20px;font-weight:700;margin:34px 0 12px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.post h3{font-size:16.5px;font-weight:600;margin:24px 0 8px;color:var(--acc)}
.post p{margin:12px 0;color:var(--muted)}
.post ul,.post ol{margin:10px 0 10px 24px;color:var(--muted)}
.post li{margin:6px 0}
.post code{background:var(--gray-bg);border-radius:6px;padding:1px 8px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13.5px;color:#c25a3a}
[data-theme="dark"] .post code{color:#f0a080}
.post pre{background:#0f1722;border-radius:12px;padding:18px;overflow-x:auto;margin:16px 0}
.post pre code{background:none;color:#c9e4ff;padding:0}
.dl{border:1px dashed var(--acc);border-radius:12px;padding:16px 20px;margin:20px 0;background:var(--acc-bg)}
.dl b{color:var(--acc)}
.warn{border-left:3px solid #f59e0b;background:var(--warn-bg,#fef6e7);padding:14px 20px;margin:20px 0;
  border-radius:0 10px 10px 0;font-size:14px;color:var(--warn-tx,#8a6d1f)}
[data-theme="dark"]{--warn-bg:rgba(245,158,11,.10);--warn-tx:#e8c56a}
/* ===== 关于 / 页脚 ===== */
.about{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:44px 52px;margin:32px 0 60px;box-shadow:var(--shadow)}
.about h1{font-size:24px;font-weight:800;margin-bottom:16px}
.about p{color:var(--muted);margin:12px 0}
footer.site{background:var(--card);border-top:1px solid var(--line);padding:26px 0;
  color:var(--muted2);font-size:13px;text-align:center}

/* 访问量 & 留言 */
.sitestat{color:#8A97AC;font-size:13px;margin-top:6px}
#comments{margin-top:28px}
.giscus{margin-top:10px}