/* =========================================================
   TraderZzz · 交易日手记 — Foundation
   字体、色彩、排版、栅格、顶栏与全站通用件。
   章节组件见 studio.css。
   ========================================================= */

@font-face{font-family:"EB Garamond Sub";src:url(fonts/EBGaramond-latin.woff2) format("woff2");font-weight:400 800;font-display:swap;unicode-range:U+0000-00FF,U+2013-2014,U+2018-201D,U+2026,U+2192-2193,U+2212}
/* Noto Serif SC（SIL OFL）按本页用字子集化，见 tools/subset-font.py */
@font-face{font-family:"TZ Serif SC";src:url(fonts/TZSerifSC-Light.woff) format("woff");font-weight:300;font-display:swap}
@font-face{font-family:"TZ Serif SC";src:url(fonts/TZSerifSC-Regular.woff) format("woff");font-weight:400;font-display:swap}

:root{
  /* ink & paper */
  --night:#0B0E12; --night2:#12171C; --night3:#1A2027;
  --nink:#ECEAE3; --nink2:rgba(236,234,227,.72); --nink3:rgba(236,234,227,.48); --nrule:rgba(236,234,227,.12); --nrule2:rgba(236,234,227,.22);
  --paper:#F2EEE5; --paper2:#E9E3D6; --card:#FBF9F3;
  --ink:#191C1F; --ink2:#4E5450; --ink3:#7E837D; --rule:rgba(25,28,31,.13); --rule2:rgba(25,28,31,.28);
  /* brand */
  --brass:#D2A56C; --brass-ink:#94622E; --brass-soft:rgba(210,165,108,.14);
  --blue:#3E78E6; --blue-ink:#2A5FC4; --orange:#E3922B; --orange-ink:#B26A12;
  --up:#3A9468; --dn:#C9483F; --up-n:#5FC291; --dn-n:#E97268;
  /* type */
  --serif:"EB Garamond Sub","TZ Serif SC","Songti SC","Noto Serif CJK SC","Noto Serif SC","Source Han Serif SC",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Helvetica Neue","PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Microsoft YaHei",sans-serif;
  /* rhythm */
  --gut:clamp(20px,5.2vw,84px); --max:1240px; --bar:60px;
  --ease:cubic-bezier(.22,1,.36,1); --ease-io:cubic-bezier(.65,0,.35,1);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--bar) + 24px)}
body{background:var(--night);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:clip;text-rendering:optimizeLegibility}
/* 极轻的纸张颗粒：静态贴图，不参与混合，不影响性能 */
body::after{content:"";position:fixed;inset:0;z-index:60;pointer-events:none;opacity:.05;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .5 0 0 0 0 .5 0 0 0 0 .5 0 0 0 .9 0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E")}
a{color:inherit;text-decoration:none}
img,video,canvas,svg{display:block;max-width:100%}
img,video{height:auto}
ul,ol{list-style:none}
em{font-style:normal}
button,input{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
button,a,input,label{-webkit-tap-highlight-color:transparent}
::selection{background:var(--brass);color:var(--night)}
:focus-visible{outline:2px solid var(--brass);outline-offset:4px}
br.m{display:inline}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:fixed;left:16px;top:-80px;z-index:100;background:var(--paper);color:var(--ink);padding:10px 18px;font-size:14px}.skip:focus{top:12px}

/* ---------- bands ---------- */
.paper{background:var(--paper);color:var(--ink)}
.paper2{background:var(--paper2);color:var(--ink)}
.dark{background:var(--night);color:var(--nink)}

/* ---------- type scale ---------- */
.kicker{display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px;font-size:11px;letter-spacing:.16em;color:var(--ink2);margin-bottom:26px}
.kicker b{font:500 11px/1 var(--sans);letter-spacing:.16em;color:var(--brass-ink)}
.kicker i{display:block;width:32px;height:1px;background:currentColor;opacity:.45}
.dark .kicker{color:var(--nink3)}.dark .kicker b{color:var(--brass)}
h1,h2,blockquote,.closing{font-family:var(--serif);font-weight:300;font-feature-settings:"palt" 1;letter-spacing:-.01em}
h2{font-size:clamp(31px,7.4vw,64px);line-height:1.28}
h2 em,h1 em,blockquote em,.closing em{color:var(--brass-ink)}
.dark h2 em,.dark h1 em,.dark .closing em{color:var(--brass)}
h3{font-family:var(--serif);font-weight:400}
.clead{margin-top:26px;max-width:36em;font-size:15.5px;line-height:2;color:var(--ink2)}
.dark .clead{color:var(--nink2)}
.prose{font-size:15.5px;line-height:2;color:var(--ink2)}
.prose p+p{margin-top:1.1em}
.b{color:var(--blue-ink);font-weight:500}.o{color:var(--orange-ink);font-weight:500}
.tag{display:inline-block;font-size:11px;letter-spacing:.12em;color:var(--brass-ink);border:1px solid currentColor;padding:2px 9px;margin-bottom:16px}
.dark .tag{color:var(--brass)}
.small{font-size:12.5px;color:var(--ink3);margin-top:14px}
.dark .small{color:var(--nink3)}

/* 标题按行揭幕（JS 打上 .in；无 JS 时直接可见） */
.lines .ln{display:block;overflow:hidden;padding-bottom:.08em;margin-bottom:-.08em}
.lines .ln>span{display:block}
.js .lines .ln>span{transform:translateY(108%);transition:transform 1.25s var(--ease)}
.js .lines .ln:nth-child(2)>span{transition-delay:.12s}
.js .lines.in .ln>span{transform:none}

/* ---------- chapter frame ---------- */
.chap{position:relative;padding:96px var(--gut) 92px;overflow:clip}
.chap>*{max-width:var(--max);margin-left:auto;margin-right:auto;position:relative}
.chead{max-width:var(--max)}
.chead>*{max-width:900px}
.ghost{position:absolute!important;top:56px;right:calc(var(--gut) * -.2);margin:0!important;font-family:var(--serif);font-weight:400;font-size:clamp(120px,36vw,380px);line-height:.85;letter-spacing:-.05em;color:transparent;-webkit-text-stroke:1px var(--rule2);pointer-events:none;user-select:none;white-space:nowrap;transform:translate3d(0,var(--drift,0px),0);opacity:.55}
.dark .ghost{-webkit-text-stroke-color:var(--nrule2);opacity:.6}
.ghost.word{font-weight:300;letter-spacing:0}
@supports not (-webkit-text-stroke:1px black){.ghost{color:var(--ink);opacity:.04}.dark .ghost{color:var(--nink)}}

/* ---------- top bar ---------- */
.bar{position:fixed;inset:0 0 auto;z-index:40;height:calc(var(--bar) + env(safe-area-inset-top));padding:env(safe-area-inset-top) var(--gut) 0;color:var(--ink);background:rgba(242,238,229,.86);-webkit-backdrop-filter:blur(16px) saturate(1.2);backdrop-filter:blur(16px) saturate(1.2);border-bottom:1px solid var(--rule);transition:background .5s,color .5s,border-color .5s,transform .5s var(--ease)}
.bar-inner{width:100%;max-width:var(--max);height:var(--bar);margin:0 auto;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px}
.bar.is-dark{background:rgba(11,14,18,.8);color:var(--nink);border-color:var(--nrule)}
.bar.at-top{background:transparent;border-color:transparent;-webkit-backdrop-filter:none;backdrop-filter:none}
.mark img{width:92px;height:auto}.mark .m-dark{display:none}
.bar.is-dark .m-light{display:none}.bar.is-dark .m-dark{display:block}
.top-nav,.bar-cta,.bar-rail{display:none}
.bar-clock{justify-self:center;display:flex;align-items:baseline;gap:8px;white-space:nowrap;font-size:11px;letter-spacing:.08em;color:var(--ink3)}
.bar.is-dark .bar-clock{color:var(--nink3)}
.bc-time{position:relative;display:inline-block;overflow:hidden;height:1.3em;line-height:1.3em;font-family:var(--serif);font-size:17px;letter-spacing:.01em;color:var(--ink);vertical-align:bottom}
.bar.is-dark .bc-time{color:var(--nink)}
.bc-time>span{display:block;transition:transform .55s var(--ease),opacity .55s}
.bc-time>span.out{position:absolute;left:0;top:0;transform:translateY(-100%);opacity:0}
.bc-time>span.enter{transform:translateY(100%);opacity:0}
.menu-btn{display:flex;align-items:center;gap:10px;min-height:44px;padding:0 2px;font-size:12px;letter-spacing:.1em}
.mb-i{position:relative;width:16px;height:9px}.mb-i::before,.mb-i::after{content:"";position:absolute;left:0;right:0;height:1px;background:currentColor;transition:transform .4s var(--ease),top .4s var(--ease)}
.mb-i::before{top:0}.mb-i::after{top:8px}
.menu-btn[aria-expanded=true] .mb-i::before{top:4px;transform:rotate(45deg)}.menu-btn[aria-expanded=true] .mb-i::after{top:4px;transform:rotate(-45deg)}
/* 阅读进度 */
.bar::after{content:"";position:absolute;left:0;bottom:-1px;height:1px;width:100%;background:var(--brass);transform:scaleX(var(--read,0));transform-origin:left;pointer-events:none}

.menu{position:fixed;inset:calc(var(--bar) + env(safe-area-inset-top)) 0 auto;z-index:39;max-height:calc(100svh - var(--bar));overflow:auto;padding:22px var(--gut) 34px;background:var(--night);color:var(--nink);border-bottom:1px solid var(--nrule);animation:menu-in .45s var(--ease)}
.menu[hidden]{display:none}
@keyframes menu-in{from{opacity:0;transform:translateY(-10px)}}
.menu-k{font-size:10px;letter-spacing:.18em;color:var(--brass);margin-bottom:10px}
.menu a{display:flex;align-items:baseline;gap:18px;padding:15px 0;border-top:1px solid var(--nrule);font-family:var(--serif);font-size:19px}
.menu a span{min-width:84px;font-family:var(--sans);font-size:11px;letter-spacing:.08em;color:var(--nink3)}
.menu a[aria-current]{color:var(--brass)}

/* ---------- buttons ---------- */
.btn-solid{display:inline-flex;align-items:center;justify-content:space-between;gap:36px;min-height:52px;padding:0 22px;background:var(--brass);color:var(--night);font-size:14px;letter-spacing:.06em;position:relative;overflow:hidden;transition:transform .5s var(--ease)}
.btn-solid::before{content:"";position:absolute;inset:0;background:var(--nink);transform:translateY(101%);transition:transform .5s var(--ease)}
.btn-solid>*{position:relative}
.btn-solid .arr{font-size:16px;transition:transform .5s var(--ease)}
.btn-solid:hover::before{transform:none}.btn-solid:hover .arr{transform:translateY(3px)}
.btn-text{position:relative;font-size:13.5px;letter-spacing:.06em;color:var(--nink2);padding:6px 0;transition:color .3s}
.btn-text::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:currentColor;transform-origin:right;transition:transform .5s var(--ease)}
.btn-text:hover{color:var(--nink)}.btn-text:hover::after{transform:scaleX(0)}

/* ---------- toast ---------- */
.toast{position:fixed;left:50%;bottom:calc(22px + env(safe-area-inset-bottom));z-index:70;transform:translate(-50%,12px);opacity:0;pointer-events:none;background:var(--nink);color:var(--night);font-size:13px;letter-spacing:.04em;padding:10px 18px;box-shadow:0 14px 40px -12px rgba(0,0,0,.5);transition:opacity .3s,transform .45s var(--ease);max-width:calc(100vw - 40px)}
.toast.on{opacity:1;transform:translate(-50%,0)}

/* ---------- reveal ---------- */
.js .fade{opacity:0;transform:translate3d(0,26px,0);transition:opacity .9s var(--ease),transform 1.1s var(--ease);transition-delay:var(--d,0ms)}
.js .fade.in{opacity:1;transform:none}

/* ---------- desktop ---------- */
@media (min-width:900px){
  :root{--bar:68px}
  br.m{display:none}
  .bar-inner{grid-template-columns:auto 1fr auto auto;gap:36px}
  .mark img{width:104px}
  .top-nav{display:flex;justify-content:center;gap:30px;font-size:12.5px;letter-spacing:.14em}
  .top-nav a{position:relative;padding:10px 0;opacity:.62;transition:opacity .25s}
  .top-nav a::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:1px;background:currentColor;transform:scaleX(0);transform-origin:left;transition:transform .45s var(--ease)}
  .top-nav a:hover,.top-nav a[aria-current]{opacity:1}.top-nav a:hover::after,.top-nav a[aria-current]::after{transform:none}
  .bar-clock{justify-self:end;font-size:12px}
  .bc-time{font-size:20px}
  .bar-cta{display:inline-flex;align-items:center;min-height:38px;padding:0 16px;border:1px solid var(--rule2);font-size:12.5px;letter-spacing:.08em;transition:background .3s,color .3s,border-color .3s}
  .bar.is-dark .bar-cta{border-color:var(--nrule2)}
  .bar-cta:hover{background:var(--brass);border-color:var(--brass);color:var(--night)}
  .menu-btn{display:none}
  .chap{padding:150px var(--gut) 140px}
  h2{font-size:clamp(40px,4.6vw,68px)}
  .clead,.prose{font-size:16.5px}
  .ghost{top:96px}
}
@media (min-width:1500px){.bar-rail{display:flex}}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;transition-delay:0s!important}
  .js .fade,.js .lines .ln>span{opacity:1;transform:none}
  .ghost{transform:none}
}