/* ============================================================
   流欺风格博客 · 浅色 Argon 式版式
   ============================================================ */
:root{
  --brand:#4f7df3; --brand2:#7b5cf0; --brand3:#a45cf0;
  --bg:#f4f6fb; --card:#ffffff; --text:#1f2733; --muted:#6b7788;
  --line:#e7ebf3; --soft:#f7f9fd;
  --shadow:0 2px 12px rgba(31,39,51,.06);
  --shadow-lg:0 16px 40px rgba(31,39,51,.12);
  --r:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
a{color:var(--brand);text-decoration:none}
a:hover{opacity:.85}
img{max-width:100%;display:block}
code{background:#eef2fa;border:1px solid #e2e8f4;border-radius:6px;padding:1px 6px;font-size:.9em;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}
pre{background:#22283a;color:#e8edf7;border-radius:12px;padding:16px 18px;overflow:auto;font-size:13px;line-height:1.65}
pre code{background:none;border:none;color:inherit;padding:0}

/* ---------- 导航 ---------- */
.nav{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid rgba(231,235,243,.9)}
.nav-in{max-width:1180px;margin:0 auto;padding:0 20px;height:62px;display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;color:var(--text);letter-spacing:.3px}
.brand .dot{width:30px;height:30px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand3));
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px;box-shadow:0 6px 14px rgba(79,125,243,.3)}
.nav-menu{display:flex;gap:4px;margin-left:8px}
.nav-menu a{padding:7px 12px;border-radius:10px;color:var(--muted);font-size:14px;font-weight:500}
.nav-menu a:hover{background:var(--soft);color:var(--text);opacity:1}
.nav-menu a.on{background:#eef3ff;color:var(--brand);font-weight:600}
.nav-search{margin-left:auto;position:relative}
.nav-search input{width:210px;height:36px;border:1px solid var(--line);background:var(--soft);border-radius:999px;
  padding:0 14px 0 36px;font-size:13.5px;outline:none;color:var(--text);transition:.18s}
.nav-search input:focus{background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(79,125,243,.12);width:240px}
.nav-search svg{position:absolute;left:12px;top:10px;width:16px;height:16px;stroke:var(--muted);fill:none;stroke-width:2}

/* ---------- 横幅 ---------- */
.hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#4f7df3 0%,#7b5cf0 55%,#a45cf0 100%);
  color:#fff;padding:74px 20px 96px;text-align:center}
.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;filter:blur(10px);opacity:.35}
.hero:before{width:340px;height:340px;background:#8fd3ff;left:-90px;top:-120px}
.hero:after{width:420px;height:420px;background:#ffb0e0;right:-120px;bottom:-220px}
.hero-in{position:relative;z-index:2;max-width:860px;margin:0 auto}
.hero h1{margin:0 0 10px;font-size:38px;letter-spacing:.5px;text-shadow:0 4px 18px rgba(0,0,0,.16)}
.hero p{margin:0 auto;max-width:620px;opacity:.92;font-size:15px}
.hero-tags{margin-top:18px;display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.hero-tags span{font-size:12.5px;padding:4px 12px;border-radius:999px;background:rgba(255,255,255,.18);
  border:1px solid rgba(255,255,255,.3)}
.hero-wave{position:absolute;left:0;right:0;bottom:-1px;height:70px;z-index:1}

/* ---------- 三栏布局 ---------- */
.layout{max-width:1180px;margin:-56px auto 0;padding:0 20px 60px;position:relative;z-index:3;
  display:grid;grid-template-columns:250px minmax(0,1fr) 270px;gap:22px;align-items:start}
.col{display:flex;flex-direction:column;gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}
.card-h{padding:14px 16px;border-bottom:1px solid var(--line);font-size:14px;font-weight:700;display:flex;align-items:center;gap:8px}
.card-h svg{width:16px;height:16px;stroke:var(--brand);fill:none;stroke-width:2}
.card-b{padding:14px 16px}
.side{position:sticky;top:78px}

/* 公告 */
.notice{background:linear-gradient(135deg,#f6a15c,#ef7f9b);color:#fff;border:2px solid rgba(255,255,255,.9);overflow:hidden;position:relative}
.notice:after{content:"";position:absolute;width:140px;height:140px;border-radius:50%;background:rgba(255,255,255,.16);right:-50px;top:-60px}
.notice .card-h{border-bottom:1px solid rgba(255,255,255,.22);color:#fff}
.notice .card-h svg{stroke:#fff}
.notice .card-b{font-size:13.5px;line-height:1.8;opacity:.96;position:relative;z-index:2}

/* 作者卡 */
.profile{text-align:center}
.profile .av{width:76px;height:76px;border-radius:50%;margin:6px auto 10px;
  background:linear-gradient(135deg,#ffd479,#ff9d76);display:flex;align-items:center;justify-content:center;
  font-size:30px;color:#fff;box-shadow:0 10px 22px rgba(255,157,118,.35)}
.profile .nm{font-weight:700;font-size:15px}
.profile .desc{font-size:12.5px;color:var(--muted);margin-top:4px}
.stats{display:flex;justify-content:space-around;margin-top:14px;padding-top:12px;border-top:1px dashed var(--line)}
.stats b{display:block;font-size:17px;color:var(--text)}
.stats span{font-size:11.5px;color:var(--muted)}

/* 标签 */
.tags{display:flex;flex-wrap:wrap;gap:8px}
.tags a{font-size:12.5px;padding:4px 10px;border-radius:8px;background:var(--soft);color:var(--muted);border:1px solid var(--line)}
.tags a:hover{background:#eef3ff;color:var(--brand);border-color:#d7e2fb;opacity:1}

/* 文章卡片 */
.posts{display:flex;flex-direction:column;gap:20px}
.post{overflow:hidden;transition:transform .18s,box-shadow .18s}
.post:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.cover{height:190px;position:relative;overflow:hidden}
.cover .grad{position:absolute;inset:0}
.cover .label{position:absolute;left:14px;top:14px;font-size:12px;color:#fff;background:rgba(0,0,0,.22);
  border:1px solid rgba(255,255,255,.35);padding:3px 10px;border-radius:999px;backdrop-filter:blur(4px)}
.post-body{padding:18px 22px 20px;text-align:center}
.post h2{margin:0 0 8px;font-size:21px;line-height:1.45}
.post h2 a{color:var(--text)}
.post h2 a:hover{color:var(--brand);opacity:1}
.meta{display:flex;justify-content:center;flex-wrap:wrap;gap:6px 14px;font-size:12.5px;color:var(--muted)}
.meta i{font-style:normal;margin-right:3px;opacity:.8}
.summary{margin:12px 0 0;color:var(--muted);font-size:14px;text-align:left}
.more{margin-top:16px;display:inline-flex;align-items:center;gap:6px;height:38px;padding:0 18px;border-radius:999px;
  background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-size:13.5px;font-weight:600;
  box-shadow:0 8px 18px rgba(79,125,243,.28)}
.more:hover{opacity:.92}

/* 文章页 */
.article{padding:26px 30px 34px;max-width:880px;margin:0 auto}
.article h1{margin:0 0 12px;font-size:29px;line-height:1.4}
.article .meta{justify-content:flex-start;margin-bottom:20px;padding-bottom:16px;border-bottom:1px solid var(--line)}
.article h2{font-size:21px;margin:30px 0 10px;padding-left:11px;border-left:4px solid var(--brand)}
.article h3{font-size:17.5px;margin:22px 0 8px}
.article p{margin:12px 0}
.article ul,.article ol{padding-left:22px}
.article li{margin:5px 0}
.article blockquote{margin:16px 0;padding:10px 16px;border-left:4px solid #c9d8fb;background:var(--soft);
  color:var(--muted);border-radius:0 10px 10px 0}
.article img{border-radius:12px;margin:16px auto}
.pager{display:flex;justify-content:space-between;gap:12px;margin-top:26px;padding-top:18px;border-top:1px solid var(--line);font-size:13.5px}
.pager a{max-width:48%;color:var(--muted)}
.pager a:hover{color:var(--brand);opacity:1}
.pager a b{display:block;color:var(--text);font-weight:600;margin-top:2px}

/* 热门/最近列表 */
.mini{list-style:none;margin:0;padding:0}
.mini li{display:flex;gap:10px;padding:9px 0;border-bottom:1px dashed var(--line)}
.mini li:last-child{border-bottom:none}
.mini .n{width:20px;height:20px;border-radius:6px;background:var(--soft);color:var(--muted);
  font-size:11.5px;display:flex;align-items:center;justify-content:center;flex:none;margin-top:2px}
.mini li:nth-child(1) .n{background:#ffe9e3;color:#e5673f}
.mini li:nth-child(2) .n{background:#fff3df;color:#c98a1c}
.mini li:nth-child(3) .n{background:#e8f1ff;color:#3d76d9}
.mini a{font-size:13.5px;color:var(--text);line-height:1.5}
.mini a:hover{color:var(--brand);opacity:1}

.footer{max-width:1180px;margin:0 auto;padding:0 20px 40px;text-align:center;color:var(--muted);font-size:12.5px}
.footer .fl{display:flex;gap:16px;justify-content:center;margin-bottom:8px;flex-wrap:wrap}

.to-top{position:fixed;right:18px;bottom:18px;width:42px;height:42px;border-radius:50%;border:none;cursor:pointer;
  background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 10px 24px rgba(79,125,243,.36);
  display:none;align-items:center;justify-content:center;z-index:70}
.to-top.on{display:flex}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .layout{grid-template-columns:minmax(0,1fr) 270px}
  .layout>.col:first-child{display:none}
}
@media (max-width:820px){
  .nav-menu{display:none}
  .nav-search{margin-left:auto}
  .nav-search input{width:150px}
  .nav-search input:focus{width:170px}
  .layout{grid-template-columns:minmax(0,1fr);margin-top:-46px}
  .layout>.col:last-child{display:none}
  .hero{padding:56px 18px 84px}
  .hero h1{font-size:27px}
  .hero p{font-size:14px}
  .article{padding:20px 18px 26px}
  .article h1{font-size:23px}
  .post h2{font-size:18.5px}
  .post-body{padding:16px 16px 18px}
  .cover{height:150px}
}
@media (max-width:420px){
  .nav-search input{width:120px}
  .hero-tags{display:none}
}