/*
  顾灿阳个人网站
  参考对象：Rick Rubin 的 The Way of Code（米色纸面、Goudy 衬线、宽字距标题、Courier 编号、一章一件作品）。
  页面自己不带强调色，颜色全部来自应用截图。
  圆角规矩：全站直角，只有手机截图保留它那台设备的圆角。
  z-index：rail 20 / 目录浮层 40 / 目录按钮 45（要压在浮层上面，不然关不掉） / 跳转链接 50
*/

@font-face{font-family:"Sorts Mill Goudy";src:url("fonts/goudy-regular.woff2?v=2aebc9a7") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Sorts Mill Goudy";src:url("fonts/goudy-italic.woff2?v=2aebc9a7") format("woff2");font-weight:400;font-style:italic;font-display:swap}
@font-face{font-family:"Courier Prime";src:url("fonts/courier-prime.woff2?v=2aebc9a7") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Songti Web";src:url("fonts/songti-400.woff2?v=2aebc9a7") format("woff2");font-weight:400;font-style:normal;font-display:swap}
@font-face{font-family:"Songti Web";src:url("fonts/songti-600.woff2?v=2aebc9a7") format("woff2");font-weight:600;font-style:normal;font-display:swap}

:root{
  --paper:#FAF9F5;
  --plate:#F0EEE6;
  --ink:#1F1E1D;
  --soft:#45433F;
  --mute:#6E6D66;
  --faint:#B5B2A8;
  --rule:rgba(31,30,29,.14);
  --shade:rgba(64,52,30,.32);
  --serif:"Sorts Mill Goudy","Songti Web","Songti SC","STSong","Noto Serif CJK SC","SimSun",serif;
  --mono:"Courier Prime","Courier New",Courier,monospace;
  --ease:cubic-bezier(.16,1,.3,1);
  --gutter:clamp(20px,5.2vw,88px);
  color-scheme:light dark;
}
@media (prefers-color-scheme:dark){
  :root{
    --paper:#191816;
    --plate:#23221F;
    --ink:#ECE9E1;
    --soft:#CBC7BD;
    --mute:#9A978E;
    --faint:#5C5A54;
    --rule:rgba(236,233,225,.16);
    --shade:rgba(0,0,0,.6);
  }
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:24px}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--serif);font-size:17px;line-height:1.95;font-weight:400;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  line-break:strict;overflow-wrap:anywhere;
  /* Goudy 默认是旧式数字，「P0」会读成「Po」，全站改用等高数字 */
  font-variant-numeric:lining-nums;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-underline-offset:.28em;text-decoration-thickness:1px}
p{margin:0}
h1,h2,h3{margin:0;font-weight:400}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
:focus-visible{outline:1px solid var(--ink);outline-offset:4px}
::selection{background:var(--ink);color:var(--paper)}

.skip{position:absolute;left:12px;top:-60px;z-index:50;background:var(--ink);color:var(--paper);padding:6px 14px;text-decoration:none;font-size:14px}
.skip:focus{top:12px}

/* ───────── 首屏 ───────── */
.hero{min-height:100dvh;display:grid;place-items:center;padding:clamp(48px,8vh,96px) var(--gutter)}
.hero-in{display:flex;flex-direction:column;align-items:center;text-align:center;width:100%}
.hero-name{
  font-size:clamp(46px,7.4vw,96px);line-height:1.15;letter-spacing:.46em;
  /* 字距会在最后一个字右边多出一截，往右推回去才是真居中 */
  padding-left:.46em;white-space:nowrap;
}
.hero-name span{display:inline-block}
.hero-latin{
  margin-top:clamp(10px,1.6vh,18px);font-size:clamp(12px,1.05vw,15px);letter-spacing:.62em;padding-left:.62em;
  color:var(--mute);line-height:1.4;
}
.hero-tag{margin-top:clamp(22px,3.6vh,40px);font-size:clamp(20px,2.3vw,30px);line-height:1.5;letter-spacing:.08em}
.hero-plate{
  margin-top:clamp(28px,5vh,56px);width:clamp(168px,20vw,228px);aspect-ratio:1;background:var(--plate);
  display:grid;place-items:center;
}
.hero-plate canvas{width:100%;height:100%;display:block}
html:not(.js) .hero-plate{display:none}
.hero-credit{margin-top:clamp(28px,5vh,56px);font-size:clamp(15px,1.25vw,18px);line-height:1.75;color:var(--soft);letter-spacing:.04em}

/* ───────── 说明 ───────── */
.note{min-height:72dvh;display:grid;place-items:center;padding:clamp(64px,10vh,120px) var(--gutter)}
.note-in{max-width:31em;font-size:clamp(18px,1.55vw,22px);line-height:2}
.note-in p + p{margin-top:1.1em}
.note-sig{margin-top:1.6em !important;color:var(--mute);font-size:.82em;letter-spacing:.3em}

/* ───────── 目录 ───────── */
.toc{padding:clamp(40px,8vh,96px) var(--gutter) clamp(72px,12vh,140px);max-width:1180px;margin-inline:auto}
.toc-h{font-size:14px;letter-spacing:.6em;color:var(--mute);text-align:center;margin-bottom:clamp(36px,6vh,64px);padding-left:.6em}
.toc-cols{display:grid;grid-template-columns:1fr 1fr;gap:clamp(40px,7vw,120px);align-items:start}
.toc-side + .toc-side{margin-top:clamp(36px,5vh,56px)}
.toc-side-h{display:flex;align-items:baseline;gap:.7em;padding-bottom:14px;margin-bottom:6px;border-bottom:1px solid var(--rule)}
.toc-side-h b{font-weight:400;font-size:22px;letter-spacing:.2em}
.toc-side-h i{font-size:18px;color:var(--soft)}
.toc ol{list-style:none;margin:0;padding:0}
.toc li a{
  display:grid;grid-template-columns:2.4em auto 1fr auto;align-items:baseline;column-gap:.5em;
  padding:7px 0;text-decoration:none;line-height:1.6;
}
.toc .t-no{font-family:var(--mono);font-size:13px;color:var(--mute)}
.toc .t-name{font-size:18px;transition:transform .4s var(--ease)}
.toc .t-dots{border-bottom:1px dotted var(--faint);transform:translateY(-.32em);min-width:1.5em}
.toc .t-when{font-family:var(--mono);font-size:12px;color:var(--mute)}
.toc li a:hover .t-name,.toc li a:focus-visible .t-name{transform:translateX(6px)}

/* ───────── A 面 / B 面 ───────── */
main{display:block}
.side-head{min-height:64dvh;display:grid;place-items:center;text-align:center;padding:clamp(64px,10vh,120px) var(--gutter)}
.side-label{font-size:clamp(40px,6vw,80px);letter-spacing:.4em;padding-left:.4em;line-height:1.2}
.side-tool{margin-top:16px;font-style:italic;font-size:clamp(22px,2.4vw,32px);line-height:1.3;padding-bottom:4px}
.side-count{margin-top:22px;font-size:15px;color:var(--mute);letter-spacing:.24em;padding-left:.24em}

/* ───────── 每一章 ───────── */
.ch{
  max-width:1280px;margin-inline:auto;
  padding:clamp(56px,11vh,140px) var(--gutter);
  display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6fr);column-gap:clamp(36px,6vw,112px);align-items:center;
}
.ch-text{max-width:30em}
.ch-no{font-family:var(--mono);font-size:14px;color:var(--mute);line-height:1;margin-bottom:26px}
.ch-name{font-size:clamp(30px,3.3vw,46px);line-height:1.25;letter-spacing:.06em;font-weight:600;text-wrap:balance}
.ch-latin{margin-top:6px;font-style:italic;font-size:20px;color:var(--soft);line-height:1.4;padding-bottom:2px}
.ch-line{margin-top:20px;font-size:clamp(19px,1.6vw,22px);line-height:1.7;text-wrap:balance}
.ch-body{margin-top:22px;color:var(--soft);text-wrap:pretty}
.ch-body p + p{margin-top:.9em}
.ch-facts{list-style:none;margin:26px 0 0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:10px 24px;font-size:15px;line-height:1.6}
.ch-facts li{padding-left:12px;border-left:1px solid var(--rule)}
.ch-meta{margin:30px 0 0;padding:16px 0 0;border-top:1px solid var(--rule);font-size:14px;line-height:1.7;display:grid;gap:3px}
.ch-meta div{display:grid;grid-template-columns:3.4em 1fr;column-gap:.6em}
.ch-meta dt{color:var(--mute);letter-spacing:.12em}
.ch-meta dd{margin:0}
.ch-go{margin-top:26px;display:flex;flex-wrap:wrap;align-items:baseline;gap:10px 28px;font-size:16px;line-height:1.6}
.ch-go .open{text-decoration:underline;text-decoration-color:var(--faint);transition:text-decoration-color .3s}
.ch-go .open:hover{text-decoration-color:var(--ink)}
.ch-go .open .host{font-family:var(--mono);font-size:13px;letter-spacing:-.01em}
.ch-go .arrow{display:inline-block;transition:transform .4s var(--ease);margin-left:.2em}
.ch-go .open:hover .arrow{transform:translate(2px,-2px)}
.ch-go .none{color:var(--mute);font-size:14px}
.try{
  font-size:14px;color:var(--soft);border-bottom:1px solid var(--faint);padding-bottom:1px;line-height:1.5;
  transition:color .3s,border-color .3s;
}
.try:hover{color:var(--ink);border-color:var(--ink)}
.try:active{transform:translateY(1px)}
.try[aria-pressed="true"]{color:var(--ink);border-color:var(--ink)}

/* B 面整体翻过来：图在左，字在右 */
@media (min-width:900px){
  #side-b .ch{grid-template-columns:minmax(0,6fr) minmax(0,5fr)}
  #side-b .ch-plate{order:-1}
}

/* 作品托盘 */
.ch-plate{position:relative;margin:0;background:var(--plate);aspect-ratio:1/1.06;overflow:hidden;container-type:size}
.phone,.screen{
  position:absolute;overflow:hidden;background:var(--paper);
  box-shadow:0 0 0 1px var(--rule),0 34px 60px -34px var(--shade),0 12px 22px -16px var(--shade);
  transition:transform .7s var(--ease),opacity .4s;
}
.phone{aspect-ratio:390/844;border-radius:calc(100cqw * .052)}
.phone img,.screen img{width:100%;height:100%;object-fit:cover;object-position:top}
.solo .phone{height:84%;left:50%;top:8%;translate:-50% 0}
.pair .phone.back{height:74%;left:11%;top:7%}
.pair .phone.front{height:80%;right:10%;bottom:6.5%}
.wide{aspect-ratio:1/.86}
.wide .screen{width:88%;left:6%;top:50%;translate:0 -50%;border-radius:calc(100cqw * .012)}
@media (hover:hover){
  .ch-plate:hover .phone.front,.solo:hover .phone,.wide:hover .screen{transform:translateY(-8px)}
  .ch-plate:hover .phone.back{transform:translateY(5px)}
}
/* 就地试用 */
.live{position:absolute;inset:0;display:grid;place-items:center;background:var(--plate)}
.live-frame{position:relative;overflow:hidden;background:var(--paper);box-shadow:0 0 0 1px var(--rule),0 34px 60px -34px var(--shade)}
.live-frame iframe{border:0;display:block;transform-origin:0 0;background:var(--paper)}
.ch-plate.is-live .phone,.ch-plate.is-live .screen{opacity:0;pointer-events:none}

/* ───────── 不是应用的 ───────── */
.more{padding:clamp(72px,14vh,170px) var(--gutter) clamp(24px,4vh,48px)}
.more-in{max-width:1180px;margin-inline:auto}
.more-h{font-size:clamp(28px,3vw,42px);line-height:1.3;letter-spacing:.08em;font-weight:600}
.more-lead{margin-top:14px;color:var(--mute);font-size:16px}
.more-list{margin:clamp(40px,7vh,72px) 0 0;display:grid;grid-template-columns:1fr 1fr;gap:clamp(36px,5vh,56px) clamp(40px,7vw,120px)}
.more-row dt{font-size:21px;line-height:1.5;letter-spacing:.04em}
.more-row dd{margin:10px 0 0;color:var(--soft);max-width:30em}

/* ───────── 关于 ───────── */
.about{border-top:1px solid var(--rule);margin-top:clamp(56px,10vh,120px);padding:clamp(72px,12vh,150px) var(--gutter) clamp(56px,8vh,96px)}
.about-in{max-width:1180px;margin-inline:auto;display:grid;grid-template-columns:minmax(0,6fr) minmax(0,4fr);column-gap:clamp(40px,8vw,140px);align-items:start}
.about-h{font-size:clamp(28px,3vw,42px);line-height:1.3;letter-spacing:.08em;font-weight:600}
.about-text p{margin-top:1.2em;max-width:31em;font-size:clamp(17px,1.35vw,19px);color:var(--soft)}
.about-side{font-size:15px;line-height:1.85;padding-top:.6em}
.contact{margin:0 0 28px;display:grid;gap:4px}
.contact div{display:grid;grid-template-columns:3.4em 1fr;column-gap:.6em}
.contact dt{color:var(--mute);letter-spacing:.12em}
.contact dd{margin:0}
.contact .digits{font-family:var(--mono);font-size:15px;white-space:nowrap}
.contact .digits span + span{margin-left:.45em}
.colophon{color:var(--mute);font-size:14px;line-height:1.85}
.colophon + .colophon{margin-top:1em}

/* ───────── 左侧编号栏（桌面） ───────── */
.rail{
  position:fixed;left:0;top:0;bottom:0;z-index:20;width:60px;display:flex;align-items:center;
  opacity:0;visibility:hidden;transition:opacity .5s,visibility .5s;
}
.rail.on{opacity:1;visibility:visible}
.rail ol{list-style:none;margin:0;padding:0 0 0 20px;display:flex;flex-direction:column;max-height:100dvh;overflow:visible}
.rail li.gap{height:min(14px,calc((100dvh - 40px) / var(--n,24) * .7))}
/* 条目多的时候行高跟着视口缩，保证整列放得下 */
.rail a{display:flex;align-items:center;gap:10px;text-decoration:none;white-space:nowrap;height:min(20px,calc((100dvh - 40px) / var(--n,24)));line-height:1}
.rail .r-no{font-family:var(--mono);font-size:min(12px,calc((100dvh - 40px) / var(--n,24) * .68));color:var(--mute);opacity:.62;transition:color .3s,opacity .3s;position:relative}
.rail .r-no::before{content:"";position:absolute;left:-14px;top:50%;width:8px;height:1px;background:var(--ink);transform:scaleX(0);transform-origin:left;transition:transform .4s var(--ease)}
.rail .r-name{
  font-size:14px;color:var(--ink);background:var(--paper);padding:0 8px;
  opacity:0;transform:translateX(-6px);transition:opacity .3s,transform .4s var(--ease);pointer-events:none;
}
.rail a:hover .r-no,.rail a:focus-visible .r-no{color:var(--ink);opacity:1}
.rail a:hover .r-name,.rail a:focus-visible .r-name{opacity:1;transform:none}
.rail a[aria-current="true"] .r-no{color:var(--ink);opacity:1}
.rail a[aria-current="true"] .r-no::before{transform:scaleX(1)}
@media (max-width:1099px),(max-height:560px){.rail{display:none}}

/* ───────── 目录按钮和浮层（手机） ───────── */
.toc-btn{
  position:fixed;right:14px;top:calc(12px + env(safe-area-inset-top));z-index:45;
  font-size:13px;letter-spacing:.3em;padding:7px 8px 7px 12px;line-height:1;
  background:var(--paper);box-shadow:0 0 0 1px var(--rule);
  opacity:0;visibility:hidden;transition:opacity .4s,visibility .4s;
}
.toc-btn.on{opacity:1;visibility:visible}
.toc-btn:active{transform:translateY(1px)}
@media (min-width:1100px) and (min-height:561px){.toc-btn{display:none}}
.sheet{position:fixed;inset:0;z-index:40;background:var(--paper);overflow:auto;-webkit-overflow-scrolling:touch;overscroll-behavior:contain}
.sheet[hidden]{display:none}
.sheet-in{padding:calc(64px + env(safe-area-inset-top)) 28px 56px;max-width:520px;margin-inline:auto}
.sheet h3{font-size:14px;letter-spacing:.3em;color:var(--mute);margin:28px 0 8px;display:flex;gap:.8em;align-items:baseline}
.sheet h3 i{letter-spacing:0;font-size:16px}
.sheet ol{list-style:none;margin:0;padding:0}
.sheet li a{display:grid;grid-template-columns:2.6em 1fr;align-items:baseline;padding:9px 0;text-decoration:none;border-bottom:1px solid var(--rule);font-size:18px;line-height:1.5}
.sheet li a span:first-child{font-family:var(--mono);font-size:13px;color:var(--mute)}

/* ───────── 动效 ───────── */
@media (prefers-reduced-motion:no-preference){
  .js .hero-name span{opacity:0;animation:settle 1.5s var(--ease) forwards;animation-delay:calc(var(--i) * 140ms + 150ms)}
  .js .hero-latin,.js .hero-tag,.js .hero-plate,.js .hero-credit{opacity:0;animation:fade 1.4s var(--ease) forwards}
  .js .hero-latin{animation-delay:.75s}
  .js .hero-tag{animation-delay:1s}
  .js .hero-plate{animation-delay:1.25s}
  .js .hero-credit{animation-delay:1.5s}
  @keyframes settle{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
  @keyframes fade{from{opacity:0}to{opacity:1}}

  /* 滚动入场：只在支持滚动驱动动画的浏览器里生效，其余浏览器内容直接可见 */
  @supports (animation-timeline:view()){
    .ch-text > *,.ch-plate,.side-head > *,.note-in > *,.toc-cols > *,.more-row{
      animation:rise linear both;animation-timeline:view();animation-range:entry 0% entry 38%;
    }
    @keyframes rise{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}
  }
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.01ms !important;animation-duration:.01ms !important;animation-delay:0s !important}
}

/* ───────── 窄屏 ───────── */
@media (max-width:899px){
  body{font-size:16.5px;line-height:1.9}
  .hero-name{letter-spacing:.4em;padding-left:.4em}
  .note{min-height:0}
  .toc-cols{grid-template-columns:1fr;gap:44px}
  .side-head{min-height:52dvh}
  .ch{grid-template-columns:1fr;row-gap:34px;padding-block:clamp(44px,8vh,72px)}
  .ch-plate{order:-1;margin-inline:calc(var(--gutter) * -1);aspect-ratio:1/1.02}
  .wide{aspect-ratio:1/.72}
  .ch-text{max-width:none}
  .ch-no{margin-bottom:18px}
  .ch-facts{grid-template-columns:1fr}
  .try{display:none}
  .about-in{grid-template-columns:1fr;row-gap:44px}
  .more-list{grid-template-columns:1fr}
}
@media (max-width:420px){
  .ch-facts{font-size:14.5px}
  .toc .t-name{font-size:17px}
}