/* ==========================================================================
   灰烬新生 · 官方维基
   深色玻璃风格：背景插画压暗，所有面板半透明，让画面透出来
   ========================================================================== */

:root{
  /* 文字：暖白。背景是照片、明暗不均，所以整体往亮里给，并配轻微描边 */
  --ink:#ffffff;
  --ink-2:#f2ece3;
  --ink-3:#d8cebf;

  /* 玻璃面板：全部半透明，不遮挡背景 */
  --glass:rgba(255,255,255,.055);
  --glass-2:rgba(255,255,255,.085);
  --glass-3:rgba(255,255,255,.12);
  --sheet:rgba(16,12,9,.62);

  --edge:rgba(255,255,255,.10);
  --edge-2:rgba(255,255,255,.18);

  /* 取自插画本身 */
  --blue:#7ea9e4;
  --blue-2:#9cc0f0;
  --blue-soft:rgba(126,169,228,.16);
  --gold:#d6a94f;
  --gold-soft:rgba(214,169,79,.15);
  --teal:#6fb8c2;
  --plum:#bb90b8;
  --moss:#86b87e;
  --rust:#dc8b72;

  --text-gold:#ffe098;
  --text-blue:#b6d9ff;
  --text-green:#b6e6ae;
  --text-orange:#ffcd98;
  --text-red:#ffb5b5;
  --text-purple:#ddc1ff;
  --text-cyan:#9ce8f0;
  --text-pink:#ffb8e6;
  --text-lime:#d4ff98;
  --text-amber:#ffd88a;
  --text-teal:#8fd8d0;
  --text-rose:#ffadb8;
  --text-violet:#c9b3ff;
  --text-mint:#a8f5d9;
  --text-peach:#ffcba4;
  --text-sky:#a8d8ff;

  --radius:10px;
  --radius-sm:7px;

  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --sans:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono","Cascadia Code",Consolas,"SF Mono",Menlo,monospace;

  --sidebar-w:262px;
  --toc-w:206px;
  --topbar-h:60px;

  --shadow:0 1px 2px rgba(0,0,0,.3), 0 14px 34px -14px rgba(0,0,0,.6);
  --shadow-sm:0 1px 2px rgba(0,0,0,.3), 0 5px 14px -8px rgba(0,0,0,.5);
}

/* ---------- 基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{
  margin:0;min-height:100vh;
  font-family:var(--sans);
  font-size:15px;line-height:1.8;
  color:var(--ink);
  background:#0e0b08;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit;color:inherit;cursor:pointer;border:0;background:none}
svg{width:100%;height:100%;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
kbd{
  font-family:var(--mono);font-size:10.5px;line-height:1;
  padding:3px 5px;border-radius:4px;
  background:var(--glass-2);border:1px solid var(--edge);color:var(--ink-2);
}
::selection{background:var(--gold-soft);color:#fff}

::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{
  background:rgba(255,255,255,.16);border-radius:6px;
  border:3px solid transparent;background-clip:padding-box;
}
::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,.3);background-clip:padding-box;border:3px solid transparent}
*{scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.2) transparent}

/* ==========================================================================
   背景：压暗插画，只留质感
   ========================================================================== */
.bg{
  position:fixed;inset:0;z-index:0;
  width:100%;height:100%;margin:0;overflow:hidden;
  background:#0e0b08;
}
.bg img{
  width:100%;height:100%;
  object-fit:cover;object-position:50% 30%;
  display:block;
  /* 明显压暗：人物仍可辨认，但不与正文抢注意力 */
  filter:brightness(.34) contrast(1.08) saturate(.8);
  transform:scale(1.04);
  will-change:transform;
}
/* 上下缘再压一层暗，中间留出画面 */
.bg-veil{
  position:fixed;inset:0;z-index:1;pointer-events:none;
  background:
    linear-gradient(180deg,rgba(10,7,5,.9) 0%,rgba(10,7,5,.56) 26%,rgba(10,7,5,.54) 66%,rgba(10,7,5,.88) 100%),
    radial-gradient(125% 88% at 50% 44%,rgba(6,4,3,.2) 20%,rgba(6,4,3,.72) 100%);
}

/* ==========================================================================
   顶栏
   ========================================================================== */
.topbar{
  position:sticky;top:0;z-index:60;
  height:var(--topbar-h);
  display:flex;align-items:center;gap:16px;
  padding:0 20px;
  background:rgba(14,10,7,.78);
  backdrop-filter:blur(18px) saturate(1.3);
  -webkit-backdrop-filter:blur(18px) saturate(1.3);
  border-bottom:1px solid var(--edge);
}

.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;transition:opacity .18s}
.brand:hover{opacity:.75}
.brand-mark{
  width:32px;height:32px;flex:0 0 32px;display:grid;place-items:center;
  border-radius:8px;color:#fff;
  background:linear-gradient(150deg,var(--blue-2),var(--blue));
  box-shadow:0 2px 10px -3px rgba(126,169,228,.55);
}
.brand-mark svg{width:17px;height:17px;stroke:none;fill:currentColor}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text b{font-family:var(--serif);font-size:16px;font-weight:700;letter-spacing:.06em;color:var(--ink)}
.brand-text i{font-style:normal;font-size:10px;color:var(--ink-3);letter-spacing:.08em;text-transform:uppercase}

.topnav{display:flex;align-items:center;gap:1px;flex:1 1 auto;min-width:0;overflow-x:auto;scrollbar-width:none}
.topnav::-webkit-scrollbar{display:none}
.topnav a{
  position:relative;padding:7px 13px;border-radius:var(--radius-sm);
  font-size:13.5px;color:var(--ink-2);white-space:nowrap;
  transition:color .15s,background .15s;
}
.topnav a:hover{color:var(--ink);background:var(--glass-2)}
.topnav a.active{color:var(--blue-2);font-weight:600;background:var(--blue-soft)}
.topnav a.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:1px;height:2px;
  border-radius:1px;background:var(--blue);
}

.topbar-right{display:flex;align-items:center;gap:6px;flex:0 0 auto}
.icon-btn{
  width:34px;height:34px;flex:0 0 34px;display:grid;place-items:center;
  border-radius:var(--radius-sm);color:var(--ink-2);
  transition:background .15s,color .15s;
}
.icon-btn:hover{background:var(--glass-2);color:var(--ink)}
.icon-btn svg{width:16px;height:16px}

.search-btn{
  display:flex;align-items:center;gap:7px;
  height:34px;padding:0 9px 0 10px;border-radius:var(--radius-sm);
  border:1px solid var(--edge);color:var(--ink-3);
  background:var(--glass);
  font-size:12.5px;transition:.15s;
}
.search-btn:hover{border-color:var(--edge-2);color:var(--ink-2);background:var(--glass-2)}
.search-btn svg{width:14px;height:14px;flex:0 0 14px}

/* ==========================================================================
   布局：一张半透明玻璃页
   ========================================================================== */
.layout{
  position:relative;z-index:10;
  display:grid;
  grid-template-columns:var(--sidebar-w) minmax(0,1fr) var(--toc-w);
  max-width:1500px;
  margin:26px auto 54px;
  align-items:start;
  /* 不铺任何面板底色，背景插画直接透到正文下面 */
}

/* ==========================================================================
   侧栏
   ========================================================================== */
.sidebar{
  position:sticky;top:var(--topbar-h);
  height:calc(100vh - var(--topbar-h));
  display:flex;flex-direction:column;
  border-right:1px solid var(--edge);
}
.sidebar-head{display:flex;align-items:center;justify-content:space-between;padding:20px 20px 10px}
.sec-title{
  font-size:10.5px;font-weight:600;letter-spacing:.16em;
  color:var(--ink-3);text-transform:uppercase;
}

.sidebar-scroll{
  flex:1 1 auto;min-height:0;
  overflow-y:auto;overflow-x:hidden;
  padding:0 12px 20px;
  overscroll-behavior:contain;
  /* html 上有 scroll-behavior:smooth，会被继承，
     导致 JS 给 scrollTop 赋值时也变成动画滚动；这里显式设回即时 */
  scroll-behavior:auto;
}
.sidebar-scroll::-webkit-scrollbar{width:9px}
.sidebar-scroll::-webkit-scrollbar-track{background:transparent;margin:8px 0}
.sidebar-scroll::-webkit-scrollbar-thumb{
  background:rgba(255,255,255,.14);border-radius:6px;
  border:3px solid transparent;background-clip:padding-box;
}
.sidebar-scroll::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,.3);background-clip:padding-box;border:3px solid transparent}

.nav-group{margin-bottom:2px}
.nav-group-title{
  display:flex;align-items:center;gap:9px;
  padding:8px 10px;border-radius:var(--radius-sm);
  font-size:13.5px;color:var(--ink);transition:background .15s;
}
.nav-group-title:hover{background:var(--glass-2)}
.nav-group-title .g-ico{width:15px;height:15px;flex:0 0 15px;color:var(--ink-3);transition:color .15s}
.nav-group-title .g-txt{flex:1;font-weight:600;letter-spacing:.01em}
.nav-group-title .g-arrow{width:12px;height:12px;flex:0 0 12px;color:var(--ink-3);transition:transform .22s}
.nav-group.collapsed .g-arrow{transform:rotate(-90deg)}
.nav-group-title:hover .g-ico{color:var(--blue-2)}
.nav-group-title.active{color:var(--blue-2)}
.nav-group-title.active .g-ico{color:var(--blue-2)}

.nav-items{
  margin:1px 0 10px 15px;padding-left:9px;
  border-left:1px solid var(--edge);
  display:grid;gap:1px;
  overflow:hidden;transition:max-height .26s ease,opacity .2s;
}
.nav-group.collapsed .nav-items{max-height:0!important;opacity:0;margin-bottom:0}

.nav-item{
  position:relative;display:flex;align-items:center;gap:8px;
  padding:6px 9px;border-radius:6px;
  font-size:13px;color:var(--ink-2);
  transition:background .14s,color .14s;
}
.nav-item:hover{background:var(--glass-2);color:var(--ink)}
.nav-item.active{color:var(--blue-2);font-weight:600;background:var(--blue-soft)}
.nav-item.active::before{
  content:"";position:absolute;left:-10px;top:50%;transform:translateY(-50%);
  width:2px;height:14px;border-radius:1px;background:var(--blue);
}
.nav-item .n-dot{display:none}
.nav-item .n-date{
  font-family:var(--mono);font-size:10px;color:var(--ink-3);
  margin-left:auto;flex:0 0 auto;
}
.nav-item.active .n-date{color:var(--blue-2)}
.nav-item .n-tag{
  margin-left:auto;font-size:9.5px;padding:1px 5px;border-radius:3px;
  background:var(--gold-soft);color:var(--gold);font-weight:600;letter-spacing:.04em;
}

.nav-anchor{
  display:flex;align-items:center;gap:8px;
  padding:5px 9px;border-radius:6px;font-size:12.5px;color:var(--ink-3);
  transition:background .14s,color .14s;
}
.nav-anchor:hover{color:var(--ink-2);background:var(--glass-2)}
.nav-anchor.active{color:var(--blue-2);font-weight:600}
.nav-anchor .a-bar{display:none}

.sidebar-foot{padding:12px 20px;border-top:1px solid var(--edge)}
.ver{font-family:var(--mono);font-size:10px;color:var(--ink-3);letter-spacing:.06em}

/* ==========================================================================
   正文
   ========================================================================== */
.content{min-width:0;padding:36px 44px 100px}
.article{max-width:780px;margin:0 auto;animation:fade .35s ease}
@keyframes fade{from{opacity:0}to{opacity:1}}
.article.reveal-off{animation:none}

.crumbs{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--ink-3);margin-bottom:18px;flex-wrap:wrap}
.crumbs a{color:var(--ink-3);transition:color .15s}
.crumbs a:hover{color:var(--blue-2)}
.crumbs .sep{color:var(--edge-2)}
.crumbs .cur{color:var(--ink-2)}

.page-head{margin-bottom:32px;padding-bottom:20px;border-bottom:1px solid var(--edge)}
.page-title{
  margin:0 0 10px;
  font-family:var(--serif);
  font-size:30px;line-height:1.35;font-weight:700;letter-spacing:.01em;
  color:var(--ink);
}
.page-desc{margin:0;color:var(--ink-2);font-size:14px;max-width:62ch}
.page-meta{display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin-top:13px}
.chip{
  display:inline-flex;align-items:center;gap:5px;
  padding:2.5px 9px;border-radius:4px;font-size:11.5px;
  background:var(--glass-2);border:1px solid var(--edge);color:var(--ink-2);
}
.chip svg{width:11px;height:11px}
.chip.gold{background:var(--gold-soft);border-color:rgba(214,169,79,.3);color:var(--gold)}
.chip.ember{background:rgba(220,139,114,.14);border-color:rgba(220,139,114,.3);color:var(--rust)}
.chip.cyan{background:rgba(111,184,194,.14);border-color:rgba(111,184,194,.3);color:var(--teal)}
.chip.violet{background:rgba(187,144,184,.14);border-color:rgba(187,144,184,.3);color:var(--plum)}
.chip.green{background:rgba(134,184,126,.14);border-color:rgba(134,184,126,.3);color:var(--moss)}
.chip.red{background:rgba(220,139,114,.16);border-color:rgba(220,139,114,.32);color:var(--rust)}

/* ---------- 正文排版 ---------- */
.article h2{
  margin:44px 0 14px;
  font-family:var(--serif);
  font-size:21px;font-weight:700;letter-spacing:.01em;color:var(--ink);
  padding-bottom:9px;border-bottom:1px solid var(--edge);
  scroll-margin-top:calc(var(--topbar-h) + 18px);
}
.article h3{
  margin:30px 0 10px;
  font-family:var(--serif);
  font-size:16.5px;font-weight:700;color:var(--ink);
  scroll-margin-top:calc(var(--topbar-h) + 18px);
}
.article h4{margin:20px 0 8px;font-size:14.5px;font-weight:600;color:var(--ink-2)}
.article p{margin:12px 0;color:var(--ink-2)}
/* 文字压在照片上，给一排描边保证任何底子上都能读清 */
.article,.crumbs,.page-head,.stat .s-k,.stat .s-sub,.card .c-desc,
.nav-item,.nav-anchor,.nav-group-title,.toc-nav a,.footer{
  text-shadow:0 1px 2px rgba(0,0,0,.85),0 0 10px rgba(0,0,0,.55);
}
.note,.step,.tl-body,.card,.stat,.article td{text-shadow:0 1px 2px rgba(0,0,0,.75)}
.article :is(strong,b){color:var(--text-gold);font-weight:600}
.article a.inline-link{color:var(--blue-2);border-bottom:1px solid rgba(126,169,228,.35);transition:.15s}
.article a.inline-link:hover{border-bottom-color:var(--blue-2)}
.article ul,.article ol{margin:11px 0;padding-left:21px;color:var(--ink-2)}
.article li{margin:5px 0}
.article li::marker{color:var(--ink-3)}
.article hr{margin:34px 0;border:0;height:1px;background:var(--edge)}
.article blockquote{
  margin:15px 0;padding:11px 16px;
  border-left:2px solid var(--edge-2);color:var(--ink-2);
}
.article blockquote p{margin:4px 0}

.article code{
  font-family:var(--mono);font-size:.86em;
  padding:1.5px 5px;border-radius:4px;
  background:var(--glass-3);color:var(--text-blue);
}
.article pre{
  margin:15px 0;padding:15px 17px;border-radius:var(--radius);
  background:rgba(0,0,0,.42);border:1px solid var(--edge);
  overflow-x:auto;
}
.article pre code{padding:0;background:none;color:var(--ink-2);font-size:12.5px;line-height:1.7}

.article .table-wrap{
  overflow-x:auto;margin:17px 0;
  border-radius:var(--radius);
  border:1px solid var(--edge);
  background:var(--glass);
}
.article table{width:100%;border-collapse:collapse;font-size:13.5px;min-width:400px}
.article th{
  text-align:left;padding:10px 14px;
  font-size:12px;font-weight:600;letter-spacing:.05em;
  color:var(--ink);background:var(--glass-3);
  border-bottom:1px solid var(--edge-2);white-space:nowrap;
}
.article td{padding:9px 14px;border-bottom:1px solid var(--edge);color:var(--ink-2);vertical-align:top}
.article tbody tr:last-child td{border-bottom:0}
.article tbody tr:hover{background:var(--glass)}
.article a.inline-link,.md-body a[href^="#/"]{color:var(--text-blue)}
.md-body a[href^="#/"]:hover{text-decoration:underline;text-underline-offset:3px}

/* Explicit semantic colors take precedence over the default emphasis. */
.article .note.tip :is(strong,b){color:var(--text-green)}
.article .note.warn :is(strong,b){color:var(--text-orange)}
.article .note.danger :is(strong,b){color:var(--text-red)}
.article .note.info :is(strong,b){color:var(--text-blue)}
.article .note.important :is(strong,b){color:var(--text-gold)}
.article :is(.text-gold,.text-gold strong,.text-gold b){color:var(--text-gold)}
.article :is(.text-blue,.text-blue strong,.text-blue b){color:var(--text-blue)}
.article :is(.text-green,.text-green strong,.text-green b){color:var(--text-green)}
.article :is(.text-orange,.text-orange strong,.text-orange b){color:var(--text-orange)}
.article :is(.text-red,.text-red strong,.text-red b){color:var(--text-red)}
.article :is(.text-purple,.text-purple strong,.text-purple b){color:var(--text-purple)}
.article :is(.text-cyan,.text-cyan strong,.text-cyan b){color:var(--text-cyan)}
.article :is(.text-pink,.text-pink strong,.text-pink b){color:var(--text-pink)}
.article :is(.text-lime,.text-lime strong,.text-lime b){color:var(--text-lime)}
.article :is(.text-amber,.text-amber strong,.text-amber b){color:var(--text-amber)}
.article :is(.text-teal,.text-teal strong,.text-teal b){color:var(--text-teal)}
.article :is(.text-rose,.text-rose strong,.text-rose b){color:var(--text-rose)}
.article :is(.text-violet,.text-violet strong,.text-violet b){color:var(--text-violet)}
.article :is(.text-mint,.text-mint strong,.text-mint b){color:var(--text-mint)}
.article :is(.text-peach,.text-peach strong,.text-peach b){color:var(--text-peach)}
.article :is(.text-sky,.text-sky strong,.text-sky b){color:var(--text-sky)}

/* ==========================================================================
   组件：全部半透明玻璃
   ========================================================================== */

.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(228px,1fr));gap:12px;margin:20px 0}
.card{
  position:relative;display:block;overflow:hidden;
  padding:16px 17px 18px;border-radius:var(--radius);
  background:var(--glass);
  border:1px solid var(--edge);
  transition:transform .18s ease,border-color .18s,background .18s;
}
.card:hover{
  transform:translateY(-2px);
  border-color:var(--edge-2);
  background:var(--glass-2);
}
.card .c-ico{
  width:32px;height:32px;display:grid;place-items:center;margin-bottom:11px;
  border-radius:8px;color:var(--blue-2);
  background:var(--blue-soft);
}
.card .c-ico svg{width:17px;height:17px}
.card h3{
  margin:0 0 5px;font-family:var(--serif);
  font-size:15px;font-weight:700;color:var(--ink);
}
.card .c-desc{font-size:12.5px;color:var(--ink-3);line-height:1.65;margin:0}
.card .c-arrow{
  position:absolute;right:15px;bottom:14px;width:14px;height:14px;
  color:var(--ink-3);opacity:0;transition:opacity .18s,transform .18s;
}
.card:hover .c-arrow{opacity:1;transform:translateX(2px);color:var(--blue-2)}
.card .c-num{
  position:absolute;right:15px;top:14px;
  font-family:var(--mono);font-size:10.5px;color:var(--ink-3);opacity:.7;
}

.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin:19px 0}
.stat{
  padding:13px 15px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--edge);
}
.stat .s-k{font-size:11px;color:var(--ink-3);letter-spacing:.05em}
.stat .s-v{font-family:var(--serif);font-size:20px;font-weight:700;margin-top:2px;color:var(--ink)}
.stat .s-v.gold{color:var(--gold)}
.stat .s-sub{font-size:11px;color:var(--ink-3);margin-top:1px}

.note{
  --note-accent:var(--text-blue);
  --note-bg:rgba(12,12,14,.58);
  --note-glow:rgba(182,217,255,.08);
  margin:20px 0;padding:16px 18px;
  border-radius:8px;font-size:14px;line-height:1.8;
  background:var(--note-bg);
  border:1px solid var(--note-accent);
  box-shadow:0 0 0 1px var(--note-glow), 0 4px 16px -6px var(--note-glow);
  color:var(--ink-2);
  position:relative;
}
.note::before{
  content:"";position:absolute;inset:0;border-radius:8px;
  background:radial-gradient(circle at top left,var(--note-glow),transparent 60%);
  opacity:.4;pointer-events:none;
}
.note .n-head{display:flex;align-items:flex-start;gap:9px;margin-bottom:8px;color:var(--note-accent);position:relative;z-index:1}
.note .n-ico{width:20px;height:20px;flex:0 0 20px;margin-top:3px;filter:drop-shadow(0 0 4px currentColor)}
.note .n-title{min-width:0;font-size:14px;line-height:1.7;font-weight:700;overflow-wrap:anywhere}
.note .n-body{min-width:0;overflow-wrap:anywhere;position:relative;z-index:1}
.note .n-body p:first-child{margin-top:0}
.note .n-body p:last-child{margin-bottom:0}
.note .n-body :is(ul,ol){margin:8px 0;padding-left:22px}
.note .n-body li{margin:6px 0}
.note .n-head:last-child{margin-bottom:0}
.note.tip{--note-accent:var(--text-green);--note-glow:rgba(182,230,174,.12)}
.note.warn{--note-accent:var(--text-orange);--note-glow:rgba(255,205,152,.12)}
.note.danger{--note-accent:var(--text-red);--note-glow:rgba(255,181,181,.12)}
.note.info{--note-accent:var(--text-blue);--note-glow:rgba(182,217,255,.12)}
.note.important{--note-accent:var(--text-gold);--note-glow:rgba(255,224,152,.15)}

details.acc{
  margin:9px 0;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--edge);overflow:hidden;
}
details.acc summary{
  cursor:pointer;list-style:none;padding:13px 16px;
  display:flex;align-items:center;gap:10px;
  font-size:14px;font-weight:600;color:var(--ink);
  transition:background .15s;
}
details.acc summary::-webkit-details-marker{display:none}
details.acc summary:hover{background:var(--glass-2)}
details.acc summary .a-ico{width:18px;height:18px;flex:0 0 18px;display:grid;place-items:center;color:var(--ink-3);transition:transform .24s}
details.acc summary .a-ico svg{width:13px;height:13px}
details.acc[open] summary .a-ico{transform:rotate(90deg)}
details.acc .acc-body{padding:14px 16px 16px;border-top:1px solid var(--edge)}
details.acc .acc-body>*:first-child{margin-top:0}

.timeline{position:relative;margin:22px 0;padding-left:22px}
.timeline::before{
  content:"";position:absolute;left:4px;top:8px;bottom:8px;width:1px;background:var(--edge);
}
.tl-item{position:relative;padding-bottom:24px}
.tl-item::before{
  content:"";position:absolute;left:-22px;top:8px;
  width:9px;height:9px;border-radius:50%;
  background:rgba(20,15,11,.9);border:2px solid var(--ink-3);
}
.tl-item:first-child::before{border-color:var(--blue);background:var(--blue)}
.tl-date{
  font-family:var(--mono);font-size:12px;color:var(--ink-2);
  margin-bottom:6px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;
}
.tl-body{
  padding:13px 16px;border-radius:var(--radius);
  background:var(--glass);border:1px solid var(--edge);
}
.tl-body>*:first-child{margin-top:0}
.tl-body>*:last-child{margin-bottom:0}

.tag{
  display:inline-block;font-family:var(--mono);font-size:10.5px;
  padding:1.5px 7px;border-radius:4px;
  background:var(--glass-2);border:1px solid var(--edge);color:var(--ink-2);
}
.tag.fix{background:rgba(134,184,126,.14);border-color:rgba(134,184,126,.3);color:var(--moss)}
.tag.new{background:var(--blue-soft);border-color:rgba(126,169,228,.3);color:var(--blue-2)}
.tag.bal{background:rgba(187,144,184,.14);border-color:rgba(187,144,184,.3);color:var(--plum)}
.tag.del{background:rgba(220,139,114,.14);border-color:rgba(220,139,114,.3);color:var(--rust)}

.steps{counter-reset:s;margin:17px 0;display:grid;gap:8px}
.step{
  counter-increment:s;position:relative;padding:12px 15px 12px 44px;
  border-radius:var(--radius);background:var(--glass);
  border:1px solid var(--edge);font-size:13.5px;color:var(--ink-2);
}
.step::before{
  content:counter(s);position:absolute;left:13px;top:12px;
  width:21px;height:21px;border-radius:5px;display:grid;place-items:center;
  font-family:var(--mono);font-size:11.5px;font-weight:600;
  color:var(--blue-2);background:var(--blue-soft);
}

.key{
  display:inline-block;font-family:var(--mono);font-size:11.5px;
  padding:1.5px 7px;margin:0 1px;border-radius:4px;
  background:var(--glass-3);border:1px solid var(--edge-2);
  border-bottom-width:2px;color:var(--ink);white-space:nowrap;
}

.group-label{
  display:flex;align-items:center;gap:10px;margin:28px 0 11px;
  font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);
}
.group-label::after{content:"";flex:1;height:1px;background:var(--edge)}

.empty{
  padding:54px 20px;text-align:center;color:var(--ink-3);
  border:1px dashed var(--edge-2);border-radius:var(--radius);
}
.empty .e-ico{width:40px;height:40px;margin:0 auto 13px;color:var(--ink-3);opacity:.55}
.empty h3{margin:0 0 5px;font-family:var(--serif);color:var(--ink-2);font-size:15px}
.empty p{margin:0;font-size:13px}

/* ==========================================================================
   右侧目录
   ========================================================================== */
.toc{
  position:sticky;top:var(--topbar-h);
  height:calc(100vh - var(--topbar-h));
  padding:36px 18px;overflow-y:auto;font-size:12.5px;
}
.toc-head{
  font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-3);margin-bottom:10px;
}
.toc-nav{position:relative}
.toc-nav a{
  display:block;padding:4px 0 4px 10px;
  color:var(--ink-3);border-left:1px solid var(--edge);
  transition:color .15s,border-color .15s;line-height:1.55;
}
.toc-nav a:hover{color:var(--ink-2)}
.toc-nav a.active{color:var(--blue-2);border-left-color:var(--blue);font-weight:600}
.toc-nav a.lv3{padding-left:20px;font-size:12px}
.toc-empty{color:var(--ink-3);font-size:12px}

/* ==========================================================================
   搜索
   ========================================================================== */
.modal{position:fixed;inset:0;z-index:200;display:flex;justify-content:center;padding-top:13vh}
.modal[hidden]{display:none}
.modal-scrim{position:absolute;inset:0;background:rgba(4,3,2,.66);backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px);animation:fadeIn .15s}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
.modal-box{
  position:relative;width:min(640px,92vw);max-height:68vh;
  display:flex;flex-direction:column;
  border-radius:12px;overflow:hidden;
  background:rgba(22,17,13,.92);
  backdrop-filter:blur(20px) saturate(1.3);
  -webkit-backdrop-filter:blur(20px) saturate(1.3);
  border:1px solid var(--edge-2);
  box-shadow:0 30px 70px -24px rgba(0,0,0,.9);
  animation:popIn .18s ease;
}
@keyframes popIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
.search-field{display:flex;align-items:center;gap:11px;padding:15px 17px;border-bottom:1px solid var(--edge)}
.search-field svg{width:17px;height:17px;flex:0 0 17px;color:var(--ink-3)}
.search-field input{flex:1;min-width:0;border:0;outline:0;background:none;font-family:inherit;font-size:15.5px;color:var(--ink)}
.search-field input::placeholder{color:var(--ink-3)}
.search-results{flex:1 1 auto;min-height:0;overflow-y:auto;padding:7px}
.sr-group{padding:9px 11px 4px;font-size:10.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--ink-3)}
.sr-item{display:flex;align-items:center;gap:11px;padding:9px 11px;border-radius:7px;cursor:pointer;transition:background .12s}
.sr-item:hover,.sr-item.sel{background:var(--glass-2)}
.sr-item .sr-ico{width:24px;height:24px;flex:0 0 24px;display:grid;place-items:center;border-radius:6px;color:var(--blue-2);background:var(--blue-soft)}
.sr-item .sr-ico svg{width:12px;height:12px}
.sr-item .sr-main{min-width:0;flex:1}
.sr-item .sr-t{font-size:13.5px;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sr-item .sr-t mark{background:var(--gold-soft);color:var(--gold);border-radius:2px;padding:0 1px}
.sr-item .sr-s{font-size:12px;color:var(--ink-3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sr-item .sr-cat{font-size:10px;color:var(--ink-3);flex:0 0 auto}
.search-foot{display:flex;gap:14px;align-items:center;padding:9px 17px;border-top:1px solid var(--edge);font-size:11px;color:var(--ink-3)}
.search-foot span{display:flex;align-items:center;gap:4px}
.search-foot #search-count{margin-left:auto}

/* ==========================================================================
   杂项
   ========================================================================== */
.to-top{
  position:fixed;right:24px;bottom:24px;z-index:80;
  width:38px;height:38px;display:grid;place-items:center;border-radius:9px;
  background:rgba(22,17,13,.8);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border:1px solid var(--edge-2);color:var(--ink-2);
  box-shadow:var(--shadow-sm);
  opacity:0;pointer-events:none;transform:translateY(8px);
  transition:opacity .2s,transform .2s,background .15s,border-color .15s;
}
.to-top.show{opacity:1;pointer-events:auto;transform:none}
.to-top:hover{background:var(--blue);border-color:var(--blue);color:#fff}
.to-top svg{width:17px;height:17px}

.scroll-progress{
  position:fixed;top:0;left:0;height:2px;z-index:90;width:0;
  background:var(--blue);transition:width .1s linear;
}

.footer{
  margin-top:52px;padding-top:22px;border-top:1px solid var(--edge);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:12px;color:var(--ink-3);
}
.footer a{color:var(--ink-2)}
.footer a:hover{color:var(--blue-2)}

.scrim{
  position:fixed;inset:0;z-index:65;background:rgba(4,3,2,.6);
  backdrop-filter:blur(3px);-webkit-backdrop-filter:blur(3px);
  opacity:0;pointer-events:none;transition:opacity .22s;
}
.scrim.show{opacity:1;pointer-events:auto}

.only-mobile{display:none}

/* 默认可见：JS 不可用时内容照常显示 */
.rv{opacity:1;transform:none}
html.js-reveal .rv{opacity:0;transform:translateY(10px);transition:opacity .4s ease,transform .4s ease}
html.js-reveal .rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html.js-reveal .rv{opacity:1;transform:none;transition:none}
  .article{animation:none}
}

/* ==========================================================================
   Hero：插画开窗
   ========================================================================== */
.hero{
  position:relative;margin:0 0 40px;padding:76px 30px 72px;
  border-radius:12px;overflow:hidden;
  border:1px solid var(--edge-2);
  background-color:#140f0b;
  background-image:url("../img/bg-1920.jpg");
  background-size:cover;
  background-position:50% 26%;
  text-align:center;
  box-shadow:0 16px 40px -18px rgba(0,0,0,.9);
}
/* 只在文字区域压暗，画面本身保持可见 */
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(64% 104% at 50% 52%,rgba(8,5,3,.74) 0%,rgba(8,5,3,.44) 56%,transparent 100%),
    linear-gradient(180deg,rgba(8,5,3,.5) 0%,transparent 30%,transparent 60%,rgba(8,5,3,.6) 100%);
}
.hero-badge{
  position:relative;display:inline-flex;align-items:center;gap:7px;
  padding:4px 12px;margin-bottom:16px;border-radius:4px;
  font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  color:#f0e2c8;background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.2);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
.hero-badge svg{width:12px;height:12px;stroke:none;fill:currentColor}
.hero-title{
  position:relative;margin:0 0 12px;
  font-family:var(--serif);
  font-size:clamp(34px,5.4vw,52px);font-weight:800;letter-spacing:.12em;line-height:1.15;
  color:#fdf8ee;
  text-shadow:0 2px 20px rgba(0,0,0,.8),0 1px 4px rgba(0,0,0,.9);
}
.hero-sub{
  position:relative;margin:0 auto;max-width:50ch;
  font-size:14px;letter-spacing:.08em;color:rgba(253,248,238,.9);
  text-shadow:0 1px 12px rgba(0,0,0,.9);
}
.hero-sub::before,.hero-sub::after{content:"·";margin:0 9px;color:rgba(253,248,238,.55)}

.loading-skel{padding:6px 0;display:grid;gap:13px}
.sk-line{
  height:14px;border-radius:5px;
  background:linear-gradient(90deg,rgba(255,255,255,.05),rgba(255,255,255,.11),rgba(255,255,255,.05));
  background-size:200% 100%;animation:skShim 1.3s linear infinite;
}
@keyframes skShim{0%{background-position:110% 0}100%{background-position:-110% 0}}

.article h2 .head-anchor,.article h3 .head-anchor{
  display:inline-block;width:13px;height:13px;margin-left:7px;vertical-align:middle;
  opacity:0;cursor:pointer;background:var(--ink-3);
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M10 13a5 5 0 0 0 7.5.5l3-3a5 5 0 0 0-7-7l-1.7 1.7'/%3E%3Cpath d='M14 11a5 5 0 0 0-7.5-.5l-3 3a5 5 0 0 0 7 7l1.7-1.7'/%3E%3C/svg%3E") center/contain no-repeat;
          mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M10 13a5 5 0 0 0 7.5.5l3-3a5 5 0 0 0-7-7l-1.7 1.7'/%3E%3Cpath d='M14 11a5 5 0 0 0-7.5-.5l-3 3a5 5 0 0 0 7 7l1.7-1.7'/%3E%3C/svg%3E") center/contain no-repeat;
  transition:opacity .15s;
}
.article h2:hover .head-anchor,.article h3:hover .head-anchor{opacity:.6}

.toast{
  position:fixed;left:50%;bottom:34px;z-index:300;
  transform:translate(-50%,10px);opacity:0;
  padding:9px 17px;border-radius:7px;font-size:13px;
  background:rgba(240,230,216,.94);color:#1a1310;
  transition:opacity .22s,transform .22s;pointer-events:none;
}
.toast.show{opacity:1;transform:translate(-50%,0)}

.md-body{min-width:0}
.md-body>*:first-child{margin-top:0}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.music-player{
  position:fixed;left:20px;bottom:16px;z-index:85;
  display:flex;align-items:center;gap:8px;width:340px;max-width:calc(100vw - 40px);
  padding:8px 10px;border:1px solid var(--edge-2);border-radius:6px;
  background:rgba(14,14,16,.95);box-shadow:var(--shadow-sm);
}
.music-player[hidden]{display:none}
.music-main{flex:1;min-width:0;display:grid;gap:2px}
.music-main select{width:100%;min-width:0;font:inherit;font-size:12px;color:var(--ink);background:#18181b;border:0;cursor:pointer;text-overflow:ellipsis}
.music-status{font-size:10px;line-height:1.4;color:var(--ink-3)}
.music-player input[type="range"]{width:65px;flex:0 0 65px;accent-color:var(--text-blue);cursor:pointer}
.music-player button:disabled,.music-player select:disabled{opacity:.55;cursor:default}
.has-music .content{padding-bottom:150px}
.has-music .sidebar-foot{padding-bottom:90px}
@media(max-width:560px){
  .music-player{left:10px;bottom:10px;width:calc(100vw - 20px);max-width:none}
  .has-music .to-top{bottom:86px}
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width:1240px){
  .layout{grid-template-columns:var(--sidebar-w) minmax(0,1fr)}
  .toc{display:none}
}
@media (max-width:900px){
  .layout{
    grid-template-columns:minmax(0,1fr);
    margin:12px 10px 40px;
  }
  .only-mobile{display:grid}
  .search-btn span,.search-btn kbd{display:none}
  .search-btn{width:34px;padding:0;justify-content:center}

  .sidebar{
    position:fixed;top:0;left:0;z-index:70;
    width:284px;height:100vh;
    background:rgba(16,12,9,.97);
    backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
    border-right:1px solid var(--edge-2);
    transform:translateX(-101%);
    transition:transform .26s ease;
    box-shadow:0 0 40px rgba(0,0,0,.7);
  }
  .sidebar.open{transform:none}
  .sidebar-head{padding-top:16px}

  .content{padding:24px 20px 80px}
  .page-title{font-size:25px}
  .article h2{font-size:19px}
  .article h3{font-size:15.5px}
  .card-grid{grid-template-columns:1fr}
  .to-top{right:14px;bottom:14px}
  .brand-text i{display:none}
}
@media (max-width:560px){
  .topbar{padding:0 13px;gap:9px}
  .topnav a{padding:6px 10px;font-size:13px}
  .brand-text b{font-size:15px}
  .hero{padding:52px 20px 48px}
}

@media print{
  .bg,.bg-veil,.topbar,.sidebar,.toc,.to-top,.scroll-progress,.modal,.music-player{display:none!important}
  .layout{display:block;background:#fff;border:0;box-shadow:none}
  .content{padding:0}
  body{background:#fff;color:#000}
}