/* ==========================================================================
   365官网入口 · Site Kit
   /assets/site.css — reset / tokens / shell / shared components
   ========================================================================== */

/* 01 · tokens ============================================================= */
:root{
  --night:#12314F;
  --deep:#1E5A8A;
  --sky:#4E9BD6;
  --sand:#D9A441;
  --sand-pale:#F3E7CE;
  --paper:#FBF7EF;
  --clay:#C2542F;
  --clay-deep:#A84526;
  --poplar:#4F7C4A;
  --glass:rgba(233,239,244,.62);
  --line:rgba(18,49,79,.14);
  --line-sand:rgba(217,164,65,.45);
  --ink:#1B1B18;
  --ink-soft:#4B4740;
  --on-night:rgba(251,247,239,.84);

  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --fs-1:clamp(40px,7.4vw,72px);
  --fs-2:clamp(30px,4.6vw,44px);
  --fs-3:clamp(25px,2.8vw,30px);
  --fs-4:24px;
  --fs-5:17px;
  --fs-6:13px;

  --ease:cubic-bezier(.2,.7,.2,1);
  --dur:380ms;
  --maxw:1240px;
  --gutter:clamp(18px,5vw,56px);
  --pill:999px;
}

/* 02 · reset ============================================================== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote{margin:0;padding:0}
ul,ol{list-style:none}
img,svg,video{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit}
button::-moz-focus-inner{border:0}

/* 03 · base & 中文排版 ==================================================== */
body{
  font-family:var(--font-body);
  font-size:var(--fs-5);
  line-height:1.9;
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    radial-gradient(120% 80% at 6% -12%, rgba(78,155,214,.16), transparent 62%),
    radial-gradient(90% 70% at 102% -4%, rgba(217,164,65,.20), transparent 64%),
    repeating-linear-gradient(0deg, rgba(18,49,79,.045) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(90deg, rgba(18,49,79,.045) 0 1px, transparent 1px 72px);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
::selection{background:var(--sand);color:var(--night)}
h1,h2,h3,h4{font-weight:900;color:var(--night);line-height:1.1;letter-spacing:-.02em}
h1{font-size:var(--fs-1);line-height:1.02}
h2{font-size:var(--fs-2);line-height:1.14}
h3{font-size:var(--fs-4);line-height:1.32;letter-spacing:-.01em}
p{max-width:34em}
strong{font-weight:900;color:var(--night)}
code,kbd{font-family:var(--font-mono);font-size:.86em;letter-spacing:.04em}

/* 04 · 焦点与动效基线 ==================================================== */
:focus-visible{outline:3px solid var(--clay);outline-offset:3px;border-radius:6px}
.site-footer :focus-visible{outline-color:var(--sand)}
body.is-locked{overflow:hidden}

/* 05 · 通用容器与区块 ==================================================== */
.wrap{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.section{padding-block:clamp(48px,7vw,96px)}
.section__head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:20px 32px;
  margin-bottom:clamp(24px,4vw,40px);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:var(--fs-6);
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--deep);
  margin-bottom:14px;
}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--sand);display:block}
.num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:var(--fs-6);
  letter-spacing:.08em;
  color:var(--deep);
}
.lede{font-size:var(--fs-5);color:var(--ink-soft);max-width:34em}
.prose p{color:var(--ink-soft);max-width:34em}
.prose p + p{margin-top:1.05em}
.prose strong{color:var(--night)}
.divider{border:0;height:1px;background:var(--line);margin-block:clamp(24px,4vw,40px)}

/* 06 · 按钮 ============================================================== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:14px 26px;
  border:1px solid transparent;
  border-radius:var(--pill);
  font-family:var(--font-body);
  font-size:var(--fs-5);
  font-weight:700;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:transform .22s var(--ease),background .22s var(--ease),color .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.btn--clay{background:var(--clay);color:var(--paper);box-shadow:0 18px 34px -24px rgba(194,84,47,1)}
.btn--clay:hover{background:var(--clay-deep);transform:translateY(-2px)}
.btn--blue{background:var(--night);color:var(--sand)}
.btn--blue:hover{background:var(--deep);transform:translateY(-2px)}
.btn--ghost{background:transparent;color:var(--night);border-color:rgba(18,49,79,.32)}
.btn--ghost:hover{background:rgba(18,49,79,.06);border-color:var(--night)}

/* 07 · 标签与状态 ======================================================== */
.chip{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 12px;
  border:1px solid var(--line-sand);
  border-radius:var(--pill);
  background:var(--sand-pale);
  color:var(--night);
  font-family:var(--font-mono);
  font-size:var(--fs-6);
  letter-spacing:.06em;
  line-height:1.5;
}
.chip--ok{background:rgba(79,124,74,.12);border-color:rgba(79,124,74,.5);color:var(--poplar)}
.chip--alert{background:rgba(194,84,47,.1);border-color:rgba(194,84,47,.42);color:var(--clay-deep)}
.status-dot{
  display:inline-block;
  width:8px;height:8px;
  border-radius:50%;
  background:var(--poplar);
  box-shadow:0 0 0 3px rgba(79,124,74,.18);
}

/* 08 · 面包屑 ============================================================ */
.crumbs{margin-block:clamp(18px,3vw,28px) 0}
.crumbs__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:var(--fs-6);
  letter-spacing:.06em;
  color:var(--ink-soft);
}
.crumbs__link{color:var(--deep);text-decoration:none;border-bottom:1px solid transparent;transition:border-color .2s var(--ease),color .2s var(--ease)}
.crumbs__link:hover{border-bottom-color:var(--sand);color:var(--night)}
.crumbs__sep{color:rgba(18,49,79,.34)}
.crumbs__current{color:var(--night);font-weight:700}

/* 09 · 跳转链接 ========================================================== */
.skip-link{
  position:fixed;
  top:10px;left:10px;
  z-index:300;
  transform:translateY(-200%);
  padding:12px 20px;
  border-radius:var(--pill);
  background:var(--night);
  color:var(--sand);
  font-family:var(--font-mono);
  font-size:var(--fs-6);
  letter-spacing:.08em;
  text-decoration:none;
  transition:transform .24s var(--ease);
}
.skip-link:focus-visible{transform:translateY(0)}

/* 10 · 页头 ============================================================== */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  padding:10px 0 12px;
  background:linear-gradient(180deg,rgba(251,247,239,.96) 0%,rgba(251,247,239,.78) 62%,rgba(251,247,239,0) 100%);
  transition:padding .3s var(--ease),background .3s var(--ease);
}
.site-header[data-scrolled]{
  padding:6px 0 8px;
  background:linear-gradient(180deg,rgba(251,247,239,.98) 0%,rgba(251,247,239,.9) 78%,rgba(251,247,239,.7) 100%);
}
.site-header__inner{
  position:relative;
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
}

/* 品牌浮岛 */
.brand{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:7px 18px 7px 7px;
  border:1px solid var(--line);
  border-radius:var(--pill);
  background:var(--glass);
  -webkit-backdrop-filter:blur(14px) saturate(1.15);
  backdrop-filter:blur(14px) saturate(1.15);
  text-decoration:none;
  color:var(--night);
  transition:transform .26s var(--ease),box-shadow .26s var(--ease);
}
.brand:hover{transform:translateY(-1px);box-shadow:0 14px 30px -24px rgba(18,49,79,.95)}
.brand__mark{
  display:grid;
  place-items:center;
  width:42px;height:42px;
  background:var(--night);
  color:var(--sand);
  font-family:var(--font-mono);
  font-size:var(--fs-6);
  letter-spacing:.02em;
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.brand__text{display:flex;flex-direction:column;line-height:1.16}
.brand__name{font-size:var(--fs-4);font-weight:900;letter-spacing:-.02em}
.brand__sub{font-family:var(--font-mono);font-size:var(--fs-6);letter-spacing:.1em;color:var(--deep)}

/* 右侧胶囊 */
.header-capsule{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  padding:6px;
  border:1px solid var(--line);
  border-radius:var(--pill);
  background:var(--glass);
  -webkit-backdrop-filter:blur(16px) saturate(1.15);
  backdrop-filter:blur(16px) saturate(1.15);
  box-shadow:0 20px 44px -36px rgba(18,49,79,.95);
}
.nav-capsule{display:flex;align-items:center}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{
  display:inline-block;
  padding:9px 14px;
  border-radius:var(--pill);
  font-size:var(--fs-5);
  line-height:1.4;
  letter-spacing:-.01em;
  color:var(--night);
  text-decoration:none;
  white-space:nowrap;
  transition:background .22s var(--ease),color .22s var(--ease);
}
.nav-link:hover{background:rgba(78,155,214,.18);color:var(--night)}
.nav-link[aria-current="page"]{
  background:var(--night);
  color:var(--paper);
  box-shadow:inset 0 0 0 1px rgba(217,164,65,.55);
}

/* 版本徽章 */
.toc-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 15px;
  border:1px dashed rgba(217,164,65,.85);
  border-radius:var(--pill);
  background:var(--night);
  color:var(--sand);
  font-family:var(--font-mono);
  font-size:var(--fs-6);
  letter-spacing:.06em;
  line-height:1.4;
  white-space:nowrap;
  cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.toc-badge:hover{background:var(--deep);transform:translateY(-1px)}
.toc-badge__dot{
  width:7px;height:7px;
  border-radius:50%;
  background:var(--sand);
  box-shadow:0 0 0 3px rgba(217,164,65,.22);
  flex:0 0 auto;
}
.toc-badge__text{display:inline}

/* 移动端按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:10px 15px;
  border:1px solid rgba(18,49,79,.22);
  border-radius:var(--pill);
  background:var(--paper);
  color:var(--night);
  font-family:var(--font-mono);
  font-size:var(--fs-6);
  letter-spacing:.08em;
  cursor:pointer;
  transition:background .22s var(--ease),border-color .22s var(--ease);
}
.nav-toggle:hover{background:var(--sand-pale);border-color:var(--sand)}
.nav-toggle__bars{position:relative;display:block;width:16px;height:2px;background:currentColor;transition:background .22s var(--ease)}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:16px;height:2px;
  background:currentColor;
  transition:transform .22s var(--ease);
}
.nav-toggle__bars::before{top:-5px}
.nav-toggle__bars::after{top:5px}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-5px) rotate(-45deg)}

/* 11 · 目录抽屉 ========================================================== */
.toc-drawer{position:fixed;inset:0;z-index:200;display:flex;justify-content:flex-end}
.toc-drawer[hidden]{display:none}
.toc-drawer__scrim{
  position:absolute;
  inset:0;
  background:rgba(18,49,79,.58);
  -webkit-backdrop-filter:blur(3px);
  backdrop-filter:blur(3px);
  opacity:0;
  transition:opacity .3s var(--ease);
}
.toc-drawer[data-open] .toc-drawer__scrim{opacity:1}
.toc-drawer__panel{
  position:relative;
  display:flex;
  flex-direction:column;
  gap:18px;
  width:min(430px,92vw);
  height:100%;
  padding:26px 26px 40px;
  overflow-y:auto;
  background:var(--night);
  color:var(--paper);
  border-left:1px solid var(--line-sand);
  box-shadow:-30px 0 70px -50px rgba(18,49,79,1);
  opacity:0;
  transform:translateX(28px);
  transition:transform .34s var(--ease),opacity .34s var(--ease);
}
.toc-drawer__panel::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(217,164,65,.3) 1px,transparent 1px);
  background-size:10px 10px;
  opacity:.4;
  pointer-events:none;
}
.toc-drawer__panel > *{position:relative;z-index:1}
.toc-drawer[data-open] .toc-drawer__panel{opacity:1;transform:none}
.toc-drawer__head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding-bottom:12px;
  border-bottom:1px solid var(--line-sand);
}
.toc-drawer__title{font-size:var(--fs-4);color:var(--paper);letter-spacing:-.01em}
.toc-drawer__close{
  display:grid;
  place-items:center;
  width:40px;height:40px;
  border:1px solid rgba(217,164,65,.55);
  border-radius:50%;
  background:transparent;
  color:var(--sand);
  font-size:22px;
  line-height:1;
  cursor:pointer;
  transition:background .22s var(--ease),color .22s var(--ease);
}
.toc-drawer__close:hover{background:var(--sand);color:var(--night)}
.toc-drawer__list{display:grid;gap:0}
.toc-drawer__item{border-bottom:1px dashed rgba(217,164,65,.26)}
.toc-drawer__item:last-child{border-bottom:0}
.toc-drawer__link{
  display:flex;
  align-items:baseline;
  gap:14px;
  padding:12px 8px;
  color:var(--paper);
  text-decoration:none;
  transition:color .2s var(--ease),padding-left .2s var(--ease),background .2s var(--ease);
}
.toc-drawer__link:hover{color:var(--sand);padding-left:16px;background:rgba(78,155,214,.16)}
.toc-drawer__num{
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:var(--fs-6);
  letter-spacing:.1em;
  color:var(--sand);
  flex:0 0 auto;
}
.toc-drawer__label{font-size:var(--fs-5);font-weight:700;letter-spacing:-.01em}
.toc-drawer__meta{
  margin-top:auto;
  padding-top:16px;
  border-top:1px solid rgba(217,164,65,.32);
  font-family:var(--font-mono);
  font-size:var(--fs-6);
  letter-spacing:.06em;
  color:rgba(251,247,239,.66);
  max-width:none;
}

/* 12 · 页脚 ============================================================== */
.site-footer{
  position:relative;
  margin-top:clamp(72px,10vw,128px);
  padding:clamp(56px,8vw,92px) 0 26px;
  background:var(--night);
  color:var(--on-night);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:6px;
  background:linear-gradient(90deg,var(--sand) 0 20%,var(--clay) 20% 28%,var(--sky) 28% 62%,var(--sand) 62% 100%);
}
.site-footer::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(217,164,65,.16) 1px,transparent 1px);
  background-size:12px 12px;
  opacity:.5;
  pointer-events:none;
}
.site-footer__inner{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.footer-top{
  display:grid;
  grid-template-columns:1.5fr .85fr .85fr 1.15fr;
  gap:clamp(26px,4vw,52px);
  align-items:start;
}
.footer-lede{display:flex;flex-direction:column;gap:16px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--paper)}
.footer-brand__mark{
  display:grid;
  place-items:center;
  width:38px;height:38px;
  background:var(--sand);
  color:var(--night);
  font-family:var(--font-mono);
  font-size:var(--fs-6);
  clip-path:polygon(0 0,100% 0,100% 70%,70% 100%,0 100%);
}
.footer-brand__name{font-size:var(--fs-4);font-weight:900;letter-spacing:-.02em}
.footer-statement{
  font-size:var(--fs-3);
  font-weight:900;
  line-height:1.36;
  letter-spacing:-.01em;
  color:var(--paper);
  max-width:18em;
}
.footer-stamp{
  font-family:var(--font-mono);
  font-size:var(--fs-6);
  letter-spacing:.1em;
  color:var(--sand);
  max-width:none;
}
.footer-col{display:flex;flex-direction:column}
.footer-col__title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:var(--fs-6);
  font-weight:400;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--sand);
}
.footer-list{display:grid;gap:6px}
.footer-link{
  display:inline-block;
  color:var(--on-night);
  font-size:var(--fs-5);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s var(--ease),border-color .2s var(--ease);
}
.footer-link:hover{color:var(--sand);border-bottom-color:var(--sand)}
.footer-list--contact{gap:14px}
.contact-item{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 10px}
.contact-item__key{
  font-family:var(--font-mono);
  font-size:var(--fs-6);
  letter-spacing:.1em;
  color:rgba(251,247,239,.55);
  flex:0 0 40px;
}
.contact-item__val{font-size:var(--fs-5);color:var(--paper);word-break:break-word}
.contact-item__note{
  font-family:var(--font-mono);
  font-size:var(--fs-6);
  letter-spacing:.06em;
  color:var(--poplar);
  background:rgba(79,124,74,.18);
  border:1px solid rgba(79,124,74,.5);
  border-radius:var(--pill);
  padding:2px 8px;
}
.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 28px;
  margin-top:clamp(36px,5vw,56px);
  padding-top:20px;
  border-top:1px dashed rgba(217,164,65,.45);
  font-family:var(--font-mono);
  font-size:var(--fs-6);
  letter-spacing:.06em;
  color:rgba(251,247,239,.66);
}
.footer-copy,.footer-record{max-width:none;margin:0}
.footer-record{color:var(--sand)}

/* 13 · 非对称编辑版式 ==================================================== */
.layout-editorial{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2vw,26px);
  align-items:start;
}
.layout-editorial__main{grid-column:1 / span 8;min-width:0}
.layout-editorial__rail{grid-column:10 / span 3;position:sticky;top:104px;min-width:0}

/* 书签目录杆 */
.bookmark-rail{
  position:relative;
  padding:22px 18px 26px;
  background:var(--night);
  color:var(--paper);
  box-shadow:0 30px 60px -50px rgba(18,49,79,1);
}
.bookmark-rail::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:6px;
  background:var(--sand);
}
.bookmark-rail__title{
  margin-bottom:14px;
  font-family:var(--font-mono);
  font-size:var(--fs-6);
  font-weight:400;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--sand);
}
.bookmark-rail__list{display:grid;gap:1px}
.bookmark-rail__link{
  display:flex;
  align-items:baseline;
  gap:10px;
  padding:10px 10px 10px 12px;
  border-left:3px solid transparent;
  color:rgba(251,247,239,.82);
  font-size:var(--fs-5);
  line-height:1.6;
  text-decoration:none;
  transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.bookmark-rail__link:hover{background:rgba(78,155,214,.2);color:var(--paper)}
.bookmark-rail__link[aria-current="true"]{
  border-left-color:var(--sand);
  background:rgba(78,155,214,.16);
  color:var(--paper);
}

/* 14 · 横向主题带 ======================================================== */
.band{
  position:relative;
  padding:clamp(20px,3vw,32px) 0;
  background:var(--night);
  color:var(--paper);
  overflow:hidden;
}
.band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(217,164,65,.3) 1px,transparent 1px);
  background-size:9px 9px;
  opacity:.34;
  pointer-events:none;
}
.band--sand{background:var(--sand-pale);color:var(--night)}
.band--sand::before{background-image:radial-gradient(rgba(18,49,79,.22) 1px,transparent 1px)}
.band__text{
  position:relative;
  max-width:32em;
  font-size:var(--fs-3);
  font-weight:900;
  line-height:1.34;
  letter-spacing:-.01em;
}

/* 15 · 图片容器基础规则 ================================================== */
.media{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  background:var(--sand-pale);
  border:1px solid var(--line);
}
.media__img{width:100%;height:100%;object-fit:cover}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(18,49,79,.2) 1px,transparent 1px);
  background-size:6px 6px;
  opacity:.45;
  mix-blend-mode:multiply;
  pointer-events:none;
}
.media--band{aspect-ratio:16/5}
.media--slice{aspect-ratio:4/3;clip-path:polygon(0 0,100% 0,100% 88%,88% 100%,0 100%)}
.media__caption{
  margin-top:10px;
  font-family:var(--font-mono);
  font-size:var(--fs-6);
  letter-spacing:.06em;
  color:var(--ink-soft);
  line-height:1.7;
}

/* 16 · 卡片与步骤卡 ====================================================== */
.card{
  position:relative;
  padding:clamp(20px,3vw,28px);
  background:var(--paper);
  border:1px solid var(--line);
}
.card--sand{background:var(--sand-pale);border-color:var(--line-sand)}
.step-card{
  position:relative;
  padding:clamp(20px,3vw,26px);
  background:#fff;
  border:1px solid var(--line);
  border-left:6px solid var(--sand);
}
.step-card__num{
  display:block;
  margin-bottom:8px;
  font-family:var(--font-mono);
  font-variant-numeric:tabular-nums;
  font-size:var(--fs-6);
  letter-spacing:.16em;
  color:var(--deep);
}
.step-card__title{margin-bottom:8px;font-size:var(--fs-4);color:var(--night);letter-spacing:-.01em}
.step-card__body{color:var(--ink-soft);max-width:34em}

/* 17 · 滚动显现协议 ====================================================== */
[data-reveal]{
  transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);
  transition-delay:var(--reveal-delay,0ms);
}
html.js [data-reveal]{opacity:0;transform:translateY(16px)}
html.js [data-reveal].is-in{opacity:1;transform:none}

/* 18 · 响应式 ============================================================ */
@media (max-width:1180px){
  .brand__sub{display:none}
  .nav-link{font-size:var(--fs-6);padding:9px 11px}
  .toc-badge{font-size:var(--fs-6);padding:8px 12px}
  .toc-badge__text--full{display:none}
  .toc-badge__text--short{display:inline}
}
@media (min-width:1181px){
  .toc-badge__text--short{display:none}
}
@media (max-width:1000px){
  .footer-top{grid-template-columns:1fr 1fr}
  .footer-lede{grid-column:1 / -1}
  .footer-statement{max-width:26em;font-size:var(--fs-4)}
}
@media (max-width:900px){
  .nav-toggle{display:inline-flex}
  .header-capsule{position:static}
  .nav-capsule{
    position:absolute;
    top:calc(100% + 10px);
    left:var(--gutter);
    right:var(--gutter);
    display:block;
    padding:10px;
    background:var(--paper);
    border:1px solid var(--line);
    border-radius:20px;
    box-shadow:0 34px 70px -50px rgba(18,49,79,1);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
  }
  .nav-capsule[data-open]{opacity:1;visibility:visible;transform:none}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px}
  .nav-link{display:block;padding:14px 16px;border-radius:12px;font-size:var(--fs-5)}
  .nav-link[aria-current="page"]{border-radius:12px}
  .brand__name{font-size:var(--fs-5)}
  .brand__mark{width:38px;height:38px}
  .layout-editorial__main{grid-column:1 / -1}
  .layout-editorial__rail{grid-column:1 / -1;position:static}
  .bookmark-rail{display:none}
  .toc-drawer__panel{width:min(420px,96vw);padding:22px 20px 32px}
}
@media (max-width:640px){
  body{background-attachment:scroll}
  .footer-top{grid-template-columns:1fr}
  .footer-statement{font-size:var(--fs-3)}
  .media--band{aspect-ratio:16/9}
  .footer-base{flex-direction:column;align-items:flex-start;gap:6px}
  .site-header{padding:8px 0 10px}
  .brand{padding:6px 14px 6px 6px}
}
@media (max-width:420px){
  .toc-badge__text--short{display:none}
  .toc-badge{padding:10px}
  .nav-toggle__label{display:none}
}

/* 19 · 减弱动效 ========================================================== */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  html.js [data-reveal]{opacity:1;transform:none}
  .skip-link{transition:none}
  .nav-capsule{transition:none}
  .toc-drawer__panel,.toc-drawer__scrim{transition:none}
}