:root{
  --text:#262626; --text-2:#525252; --text-3:#8c8c8c; --text-acc:#404040;
  --bg:#fff; --bg-acc:#fafafa; --border:#ebebeb;
  --brand:#FF1A75; --brand-soft:#FFF0F6;
  --radius:10px; --maxw:1120px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Helvetica,Arial,sans-serif;
  --mono:Consolas,Monaco,"Courier New",monospace;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font);color:var(--text);background:var(--bg);
  font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:2;
  stroke-linecap:round;stroke-linejoin:round}

/* ---------- 第一行 header：左 菜单/搜索 · 中 站名 · 右 链接 ---------- */
.header{background:var(--bg);border-bottom:1px solid var(--border);padding:.75em 0;
  position:sticky;top:0;z-index:60;transition:all .2s ease}
.header__container{display:flex;align-items:center;gap:1em;min-height:52px}
.header__more{display:flex;gap:.5em;flex:1}
.header__brand{flex:2;display:flex;justify-content:center;align-items:center;min-width:0}
.header__brand a{font-weight:800;font-size:1.12rem;letter-spacing:-.02em;white-space:nowrap}
.header__brand .dot{display:inline-block;width:9px;height:9px;border-radius:50%;
  background:var(--brand);margin-right:8px;vertical-align:middle}
.header__actions{flex:1;display:flex;justify-content:flex-end}
.iconbtn{display:inline-flex;align-items:center;gap:6px;background:transparent;border:none;
  color:var(--text);font-family:var(--font);font-size:.88rem;font-weight:500;
  opacity:.8;padding:.25em .5em;cursor:pointer}
.iconbtn:hover{opacity:1;color:var(--brand)}
.social-links{display:flex;flex-wrap:wrap;gap:8px;font-size:.8rem;font-weight:600}
.social-links a{align-items:center;border:1px solid var(--border);border-radius:var(--radius);
  color:var(--text-acc);display:inline-flex;padding:3px 10px;transition:all .18s ease}
.social-links a:hover{border-color:var(--brand);color:var(--brand)}

/* ---------- 第二行：导航条 ---------- */
.header-menu{box-shadow:inset 0 0 0 1px var(--border);font-size:.95rem;font-weight:500}
.header-menu .wrap{display:flex;justify-content:center}
.header-menu-nav ul{align-items:center;display:flex;gap:.15em;list-style:none;margin:0;padding:0}
.header-menu-nav li{position:relative}
.header-menu-nav a{border-bottom:2px solid transparent;border-top:2px solid transparent;
  display:block;opacity:.8;padding:.7em .8em;white-space:nowrap}
.header-menu-nav a:hover{opacity:1;color:var(--brand)}
.header-menu-nav .nav-current a{border-bottom:2px solid var(--brand);opacity:1;color:var(--brand)}
.header-menu-nav .is-mainitem>a span{display:inline-flex;align-items:center}
.header-menu-nav .is-mainitem>a span:after{content:"";display:inline-block;width:7px;height:7px;
  border-color:var(--text-acc);border-width:2px 2px 0 0;margin-left:7px;margin-top:-4px;
  opacity:.7;transform:rotate(135deg);vertical-align:middle}
.header-menu-nav .submenu{background:var(--bg);border-radius:var(--radius);
  box-shadow:0 0 0 1px var(--border),0 10px 20px 5px rgba(0,0,0,.06);
  display:flex;flex-direction:column;gap:0;left:0;min-width:230px;opacity:0;overflow:hidden;
  padding:0;position:absolute;top:46px;transform:translateY(-10px);
  transition:all .25s ease;visibility:hidden;z-index:20}
.header-menu-nav li:hover>.submenu,.header-menu-nav .submenu:focus-within{
  opacity:1;transform:translateY(0);visibility:visible}
.header-menu-nav .submenu li{border-radius:0;margin:0;width:100%}
.header-menu-nav .submenu li:not(:last-of-type){border-bottom:1px solid var(--border)}
.header-menu-nav .submenu a{display:flex;line-height:1.4;padding:8px 14px;opacity:.85;font-size:.9rem}
.header-menu-nav .submenu a:hover{background:var(--brand-soft);color:var(--brand);opacity:1}
.header-menu-nav .submenu a em{font-style:normal;color:var(--text-3);
  font-size:.78rem;margin-left:auto;padding-left:12px}

/* ---------- 抽屉（窄屏点"菜单"弹出） ---------- */
.menu{position:fixed;inset:0;background:rgba(255,255,255,.98);z-index:80;
  padding:24px;overflow:auto;display:none}
.menu.is-open{display:block}
.menu__head{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}
.menu__navigation{display:grid;grid-template-columns:repeat(2,1fr);gap:.2em 1em;list-style:none;
  margin:0;padding:0}
.menu__navigation a{display:block;padding:.5em 0;font-weight:600;font-size:1rem}
.menu__navigation a:hover{color:var(--brand)}
.menu__sub{list-style:none;margin:0 0 12px;padding:0 0 0 12px;border-left:1px solid var(--border)}
.menu__sub a{font-weight:400;font-size:.88rem;color:var(--text-2);padding:.25em 0}

/* ---------- 搜索浮层 ---------- */
.searchbox{display:none;border-bottom:1px solid var(--border);background:var(--bg-acc);padding:18px 0}
.searchbox.is-open{display:block}
.searchbox input{width:100%;font-family:var(--font);font-size:1rem;padding:12px 16px;
  border:1px solid var(--border);border-radius:var(--radius);background:#fff;outline:none}
.searchbox input:focus{border-color:var(--brand)}
.searchbox .hint{font-size:.8rem;color:var(--text-3);margin-top:8px}

/* ---------- 标签页 hero（灰底带 · 左文右图） ---------- */
.bg-acc{background:var(--bg-acc);border-bottom:1px solid var(--border)}
.tag-hero{align-items:center;display:flex;gap:2em;padding:2.4em 0;margin-bottom:0}
.tag-hero__content,.tag-hero__media{flex:1}
.tag-hero__content h1{font-size:clamp(1.8rem,1.4rem+1.6vw,2.6rem);line-height:1.2;
  margin:0 0 .5em;font-weight:800;letter-spacing:-.03em}
.tag-hero__description{font-size:clamp(.9rem,.9rem+1vw,1.08rem);margin:0;opacity:.75;max-width:36rem}
.tag-hero__media{margin:0}
.tag-hero__img{aspect-ratio:16/9;border-radius:14px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;color:#fff;width:100%;gap:4px}
.tag-hero__img b{font-size:3.4rem;font-weight:800;letter-spacing:-.04em;line-height:1}
.tag-hero__img span{font-size:.9rem;opacity:.85}

/* ---------- 小标题（"N 篇文章"那一条） ---------- */
.section-title{border-bottom:3px solid var(--border);color:var(--text-acc);display:block;
  font-size:clamp(.9rem,.9rem+1vw,1.1rem);font-weight:700;letter-spacing:1px;line-height:1.2;
  margin:3rem 0 1.5rem;padding-bottom:.5rem;text-transform:uppercase}
.section-title em{font-style:normal;color:var(--brand)}

/* ---------- 横向卡片列表 ---------- */
.list-narrow{max-width:60rem}
.post-card.horizontal{display:flex;flex-direction:row;gap:1.4em;align-items:flex-start;
  padding-bottom:1.6em;margin-bottom:1.6em;border-bottom:1px solid var(--border)}
.post-card.horizontal:last-child{border-bottom:0}
.post-card__media{flex:2;align-self:flex-start;border-radius:var(--radius);overflow:hidden;display:block}
.post-card__media .cover{aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;
  position:relative;transition:transform .2s ease}
.post-card.horizontal:hover .cover{transform:scale(1.03)}
.post-card__media .cover .num{font-size:2.4rem;font-weight:800;letter-spacing:-.03em;opacity:.92}
.post-card__media .cover .kind{position:absolute;left:10px;bottom:8px;font-size:.7rem;
  font-weight:600;padding:3px 9px;border-radius:999px;background:rgba(255,255,255,.85)}
.post-card__content{flex:3;min-width:0}
.post-card-tags{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-top:0}
.post-tag{color:var(--brand);font-size:.78rem;font-weight:700;letter-spacing:.02em}
.post-card__title{font-size:clamp(1.05rem,1rem+1vw,1.25rem);line-height:1.35;margin:.35rem 0 .5rem;
  font-weight:700;letter-spacing:-.015em}
.post-card.horizontal:hover .post-card__title a{color:var(--brand)}
.post-card__excerpt{font-size:.9rem;color:var(--text-2);margin:.5rem 0 0;opacity:.9;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-info{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:.7rem;
  font-size:.8rem;color:var(--text-3)}
.badge{font-size:.72rem;padding:2px 8px;border-radius:5px;background:var(--bg-acc);
  border:1px solid var(--border);color:var(--text-2)}
.badge.hot{background:var(--brand-soft);border-color:#ffc6dd;color:#c3125a;font-weight:600}
.is-soon{opacity:.5}

/* ---------- 板块入口卡（首页用网格） ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(268px,1fr));gap:22px}
.card{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:var(--radius);
  overflow:hidden;background:#fff;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}
.card:hover{transform:translateY(-3px);box-shadow:0 10px 26px rgba(0,0,0,.07);border-color:#dcdcdc}
.card .cover{aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;position:relative}
.card .cover .num{font-size:2.6rem;font-weight:800;letter-spacing:-.03em;opacity:.92}
.card .cover .kind{position:absolute;left:12px;bottom:10px;font-size:.72rem;font-weight:600;
  padding:3px 9px;border-radius:999px;background:rgba(255,255,255,.85)}
.card-body{padding:16px 18px 18px;display:flex;flex-direction:column;flex:1}
.card h3{margin:0 0 8px;font-size:1.03rem;line-height:1.45;font-weight:700;letter-spacing:-.01em}
.card:hover h3{color:var(--brand)}
.card p.ex{margin:0;font-size:.88rem;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card .foot{margin-top:14px;padding-top:12px;border-top:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-between;font-size:.78rem;color:var(--text-3)}

/* ---------- 首页 hero ---------- */
.hero{padding:56px 0 44px}
.eyebrow{font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--brand);
  font-weight:600;margin-bottom:14px}
.hero h1{font-size:2.55rem;line-height:1.18;margin:0 0 16px;letter-spacing:-.025em;font-weight:800}
.hero .lead{font-size:1.1rem;color:var(--text-2);max-width:760px;margin:0}
.meta-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.chip{font-size:.78rem;padding:4px 11px;border-radius:999px;background:var(--bg-acc);
  border:1px solid var(--border);color:var(--text-2)}
.chip.hot{background:var(--brand-soft);border-color:#ffc6dd;color:#c3125a;font-weight:600}
.notice{background:#FFF8E6;border-bottom:1px solid #F2E3B8;color:#8a6d1f;font-size:.85rem;padding:10px 0}
.notice .wrap{display:flex;gap:8px;align-items:center;flex-wrap:wrap}

/* ---------- 文章页 ---------- */
.article{padding:38px 0 60px;max-width:780px;margin:0 auto}
.crumb{font-size:.85rem;color:var(--text-3);margin-bottom:18px}
.crumb a{color:var(--brand)}
.article h1{font-size:2.1rem;line-height:1.25;margin:0 0 14px;font-weight:800;letter-spacing:-.025em}
.article .post-meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;
  font-size:.82rem;color:var(--text-3);margin-bottom:30px;padding-bottom:22px;
  border-bottom:1px solid var(--border)}
.article h2{font-size:1.32rem;margin:38px 0 14px;font-weight:700;letter-spacing:-.015em;
  padding-top:22px;border-top:1px solid var(--border)}
.article h2:first-of-type{border-top:0;padding-top:0}
.article h3{font-size:1.05rem;margin:26px 0 10px;font-weight:700}
.article p{margin:0 0 16px}
.article ul,.article ol{margin:0 0 18px;padding-left:22px}
.article li{margin:5px 0}
.article strong{font-weight:700;color:#111}
.article hr{border:0;border-top:1px solid var(--border);margin:32px 0}
.article blockquote{margin:20px 0;padding:14px 18px;background:var(--bg-acc);
  border-left:3px solid var(--brand);border-radius:0 8px 8px 0;color:var(--text-2);font-size:.95rem}
.article table{width:100%;border-collapse:collapse;margin:18px 0;font-size:.92rem;display:block;overflow-x:auto}
.article th,.article td{border:1px solid var(--border);padding:9px 12px;text-align:left;vertical-align:top}
.article th{background:var(--bg-acc);font-weight:600;white-space:nowrap}
.article tbody tr:nth-child(even){background:#fcfcfc}
.article code{font-family:var(--mono);font-size:.86em;background:#f4f4f5;
  padding:2px 6px;border-radius:4px;color:#c3125a}
.article pre{background:#1f2428;color:#e6e6e6;padding:16px 18px;border-radius:8px;
  overflow-x:auto;font-size:.85rem;line-height:1.65;margin:18px 0}
.article pre code{background:none;color:inherit;padding:0;font-size:.9em}
.mermaid{background:var(--bg-acc);border:1px solid var(--border);border-radius:8px;
  padding:18px;margin:20px 0;text-align:center}
.wiki-link{color:var(--brand);border-bottom:1px solid #ffc6dd}
.wiki-miss{color:var(--text-3);border-bottom:1px dotted #ccc}
.nextup{margin-top:46px;padding-top:26px;border-top:1px solid var(--border)}
.rel{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.rel a{font-size:.86rem;padding:6px 12px;border:1px solid var(--border);border-radius:999px;
  background:var(--bg-acc)}
.rel a:hover{border-color:var(--brand);color:var(--brand)}

/* ---------- footer ---------- */
.site-foot{border-top:1px solid var(--border);padding:30px 0 46px;color:var(--text-3);font-size:.85rem}
.site-foot .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

@media (max-width:900px){
  .header-menu{display:none}
  .header__actions{display:none}
  .tag-hero{flex-direction:column;gap:1.2em}
  .post-card.horizontal{flex-direction:column}
  .post-card__media{width:100%}
  .hero h1{font-size:1.9rem}
}