/* ============================================================
   仲博客户端 · 共享样式 /assets/site.css
   基底：深墨蓝工作台 / 浅灰白留白 / 荧光青编号 / 暖橘关键动作
   ============================================================ */

/* ---------- 1 Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,figcaption,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,picture,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.3;font-weight:750}

/* ---------- 2 Tokens ---------- */
:root{
  --ink-950:#08131F;
  --ink-800:#102A44;
  --ink-600:#1E4A6E;
  --cyan-400:#2FE3C4;
  --cyan-200:#9BF3E4;
  --cyan-600:#0C8C79;
  --orange-500:#FF7A2F;
  --orange-100:#FFE3D2;
  --orange-700:#A53F0B;
  --paper-50:#F7F9FB;
  --paper-200:#DCE5EE;
  --glass:rgba(255,255,255,.12);
  --glass-line:rgba(155,243,228,.38);
  --text-900:#0E1E2C;
  --text-500:#5A7288;
  --text-invert:#E8F0F7;
  --hair-ink:rgba(30,74,110,.9);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono","Courier New",monospace;
  --shell:1240px;
  --radius:14px;
  --radius-sm:8px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --s-12:.75rem;
  --s-14:.875rem;
  --s-16:1rem;
  --s-20:1.25rem;
  --s-28:1.75rem;
  --s-40:2.5rem;
  --s-56:3.5rem;
}

/* ---------- 3 基础排版 ---------- */
body{
  font-family:var(--font-sans);
  font-size:var(--s-16);
  line-height:1.75;
  color:var(--text-900);
  background:var(--paper-50);
  min-height:100vh;
}
p{max-width:68ch}
.mono{font-family:var(--font-mono);font-size:.8125rem;letter-spacing:.06em}

/* ---------- 4 焦点与可访问 ---------- */
:focus-visible{outline:2px solid var(--orange-500);outline-offset:3px;border-radius:4px}
.site-header :focus-visible,.site-footer :focus-visible{outline-color:var(--cyan-400)}
.skip-link{
  position:absolute;left:12px;top:-72px;z-index:200;
  padding:10px 16px;border-radius:var(--radius-sm);
  background:var(--cyan-400);color:var(--ink-950);
  font-weight:700;font-size:var(--s-14);
  transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}

/* ---------- 5 容器与栅格 ---------- */
.container{
  width:100%;max-width:var(--shell);
  margin-inline:auto;
  padding-inline:clamp(16px,4vw,44px);
}
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(14px,2vw,26px)}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.col-12{grid-column:span 12}

/* ---------- 6 通用元素 ---------- */
.rule{height:1px;border:0;background:var(--paper-200);margin-block:clamp(20px,3vw,34px)}
.rule--ink{background:var(--ink-600)}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 10px;border-radius:999px;
  font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.08em;
  border:1px solid var(--paper-200);color:var(--text-500);background:#fff;
}
.tag--update{border-color:var(--orange-500);background:var(--orange-100);color:var(--orange-700)}

/* 图片容器基础规则（页面阶段放置 img） */
.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/9;border-radius:var(--radius);
  border:1px solid var(--paper-200);
  background:linear-gradient(135deg,#EDF3F9 0%,#DCE5EE 60%,#F7F9FB 100%);
}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-frame--ink{
  border-color:var(--ink-600);
  background:linear-gradient(135deg,var(--ink-800) 0%,var(--ink-950) 100%);
}
.media-frame>img,.media-frame>picture>img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
}
.media-frame__placeholder{
  position:absolute;inset:0;display:grid;place-items:center;
  font-family:var(--font-mono);font-size:.75rem;letter-spacing:.14em;
  color:var(--text-500);text-transform:uppercase;
}
.media-frame--ink .media-frame__placeholder{color:rgba(155,243,228,.7)}
.media-frame__tag{
  position:absolute;left:12px;bottom:12px;z-index:2;
  padding:4px 10px;border-radius:6px;
  background:rgba(8,19,31,.72);color:var(--cyan-200);
  font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.08em;
}

/* ---------- 7 面板 / 章节 ---------- */
.section{padding-block:clamp(40px,6vw,88px)}
.section--ink{background:var(--ink-950);color:var(--text-invert)}
.section--tint{background:linear-gradient(180deg,var(--paper-50) 0%,#EDF3F9 100%)}
.section__head{
  display:flex;flex-wrap:wrap;align-items:flex-end;gap:10px 20px;
  padding-bottom:16px;margin-bottom:28px;
  border-bottom:1px solid var(--paper-200);
}
.section--ink .section__head{border-bottom-color:var(--ink-600)}
.section__num{
  font-family:var(--font-mono);font-size:.8125rem;letter-spacing:.16em;
  color:var(--orange-500);
}
.section__title{font-size:clamp(1.5rem,3vw,2.125rem);font-weight:800;letter-spacing:-.01em}
.panel{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  background:#fff;border:1px solid var(--paper-200);border-radius:var(--radius);
}
.panel--ink{background:var(--ink-800);border-color:var(--ink-600);color:var(--text-invert)}
.panel--glass{background:var(--glass);border:1px solid var(--glass-line);backdrop-filter:blur(10px)}
.panel--accent{border-left:3px solid var(--cyan-400)}
.panel__head{display:flex;justify-content:space-between;align-items:baseline;gap:16px;margin-bottom:14px}
.panel__index{font-family:var(--font-mono);font-size:.8125rem;letter-spacing:.1em;color:var(--cyan-600)}
.panel--ink .panel__index{color:var(--cyan-400)}
.panel__title{font-size:1.125rem;font-weight:700}

/* ---------- 8 章节索引栏 ---------- */
.chapter-rail{display:flex;flex-direction:column;gap:2px;font-family:var(--font-mono);font-size:.8125rem}
.chapter-rail__link{
  display:flex;align-items:center;gap:10px;
  padding:9px 12px;border-radius:var(--radius-sm);
  border:1px solid transparent;color:var(--text-500);letter-spacing:.04em;
  transition:transform .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),background-color .2s var(--ease);
}
.chapter-rail__link:hover{color:var(--text-900);border-color:var(--paper-200)}
.chapter-rail__link.is-active{color:var(--text-900);background:#fff;border-color:var(--paper-200);transform:translateX(4px)}
.chapter-rail__num{color:var(--text-500);letter-spacing:.1em}
.chapter-rail__link.is-active .chapter-rail__num{color:var(--cyan-600)}
.chapter-rail--ink .chapter-rail__link{color:rgba(232,240,247,.62)}
.chapter-rail--ink .chapter-rail__link:hover{border-color:var(--ink-600);color:#fff}
.chapter-rail--ink .chapter-rail__link.is-active{background:rgba(255,255,255,.07);border-color:var(--glass-line);color:#fff}
.chapter-rail--ink .chapter-rail__link.is-active .chapter-rail__num{color:var(--cyan-400)}

/* ---------- 9 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:6px;
  padding-block:14px;
  font-family:var(--font-mono);font-size:.75rem;letter-spacing:.06em;
  color:var(--text-500);
}
.breadcrumb__item{display:inline-flex;align-items:center;gap:6px}
.breadcrumb__item:not(:last-child)::after{content:"/";color:var(--paper-200)}
.breadcrumb a:hover{color:var(--cyan-600)}
.breadcrumb [aria-current="page"]{color:var(--text-900)}
.breadcrumb--ink{color:rgba(232,240,247,.6)}
.breadcrumb--ink .breadcrumb__item:not(:last-child)::after{color:var(--ink-600)}
.breadcrumb--ink a:hover{color:var(--cyan-400)}
.breadcrumb--ink [aria-current="page"]{color:#fff}

/* ---------- 10 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:999px;
  font-size:var(--s-14);font-weight:600;letter-spacing:.01em;
  border:1px solid transparent;text-align:center;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.btn--primary{background:var(--orange-500);color:#1B0C02}
.btn--primary:hover{background:#FF8B48}
.btn--ghost{border-color:var(--glass-line);color:var(--cyan-600)}
.btn--ghost:hover{background:rgba(47,227,196,.14);border-color:var(--cyan-400);color:var(--text-900)}
.btn--sm{padding:8px 15px;font-size:.8125rem}
.btn--copy{
  padding:6px 12px;border-radius:var(--radius-sm);
  font-family:var(--font-mono);font-size:.75rem;letter-spacing:.08em;
  border-color:var(--glass-line);color:var(--cyan-200);
}
.btn--copy:hover{background:rgba(47,227,196,.14);border-color:var(--cyan-400);color:#fff}
.btn--copy.is-done{background:var(--cyan-400);border-color:var(--cyan-400);color:var(--ink-950)}

/* ---------- 11 头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  color:var(--text-invert);
  background-color:var(--ink-950);
  background-image:linear-gradient(180deg,rgba(8,19,31,.98) 0%,rgba(16,42,68,.94) 100%);
  border-bottom:1px solid var(--hair-ink);
  backdrop-filter:blur(12px);
}
.site-header::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(120% 150% at 10% -30%,rgba(47,227,196,.18),transparent 62%);
}
.header-inner{position:relative;z-index:1}

.header-upper{
  display:flex;align-items:center;gap:clamp(16px,3vw,40px);
  min-height:60px;padding-block:10px;
  border-bottom:1px solid rgba(30,74,110,.7);
  overflow:hidden;max-height:140px;
  transition:max-height .3s var(--ease),opacity .24s var(--ease),padding .3s var(--ease);
}
.site-header[data-compact] .header-upper{
  max-height:0;opacity:0;padding-block:0;border-bottom-color:transparent;
}

.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand__mark{
  display:grid;place-items:center;
  width:34px;height:34px;border-radius:10px;
  background:linear-gradient(135deg,var(--cyan-400) 0%,var(--ink-600) 100%);
  color:var(--ink-950);font-weight:800;font-size:.9375rem;line-height:1;
}
.brand__text{display:flex;flex-direction:column;gap:1px}
.brand__name{font-size:1.0625rem;font-weight:750;letter-spacing:.02em;color:#fff}
.brand__desc{font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.1em;color:var(--cyan-200)}
.brand--footer .brand__name{font-size:1.25rem}

.header-tagline{
  flex:1 1 auto;min-width:0;
  padding-left:clamp(16px,3vw,40px);
  border-left:1px solid rgba(30,74,110,.85);
  font-size:.8125rem;color:rgba(232,240,247,.68);
  max-width:none;
}
.header-serial{
  flex:0 0 auto;
  font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.14em;
  color:rgba(155,243,228,.55);
}

.header-lower{
  display:flex;align-items:center;gap:clamp(10px,2vw,22px);
  min-height:56px;padding-block:6px;
}

.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:9px 14px;border-radius:999px;
  border:1px solid var(--glass-line);color:var(--cyan-200);
  font-family:var(--font-mono);font-size:.75rem;letter-spacing:.08em;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.nav-toggle:hover{background:rgba(47,227,196,.12);border-color:var(--cyan-400)}
.nav-toggle__bars{
  position:relative;width:16px;height:2px;background:currentColor;
  box-shadow:0 -5px 0 currentColor,0 5px 0 currentColor;
}
.nav-toggle[aria-expanded="true"]{border-color:var(--orange-500);color:var(--orange-500);background:rgba(255,122,47,.12)}

.site-nav{flex:1 1 auto;min-width:0}
.site-nav__list{display:flex;flex-wrap:wrap;gap:2px 4px;counter-reset:navidx}
.site-nav__item{display:block}
.site-nav__link{
  display:inline-flex;align-items:baseline;gap:8px;
  padding:8px 12px;border-radius:var(--radius-sm);
  border:1px solid transparent;
  font-size:.9375rem;color:rgba(232,240,247,.82);
  transition:background-color .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.site-nav__link::before{
  counter-increment:navidx;
  content:counter(navidx,decimal-leading-zero);
  font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.08em;
  color:rgba(47,227,196,.7);
}
.site-nav__link:hover{color:#fff;background:rgba(255,255,255,.06);border-color:var(--glass-line)}
.site-nav__link[aria-current="page"]{
  background:var(--cyan-400);border-color:var(--cyan-400);
  color:var(--ink-950);font-weight:700;
}
.site-nav__link[aria-current="page"]::before{color:var(--ink-800)}

.header-tools{display:flex;align-items:center;gap:12px;margin-left:auto;flex:0 0 auto}
.readout{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 10px;border-radius:var(--radius-sm);
  border:1px dashed rgba(47,227,196,.4);
  background:rgba(8,19,31,.55);
  font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.1em;
  color:rgba(232,240,247,.6);white-space:nowrap;
}
.readout__num{color:var(--cyan-400);font-weight:700;letter-spacing:.06em}

.progress-rail{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:rgba(30,74,110,.7);overflow:hidden;
}
.progress-rail__bar{
  display:block;width:100%;height:100%;
  transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--cyan-400) 0%,var(--orange-500) 100%);
}

/* ---------- 12 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(48px,7vw,96px);
  background-image:linear-gradient(180deg,var(--ink-800) 0%,var(--ink-950) 100%);
  background-color:var(--ink-950);
  color:var(--text-invert);
  border-top:1px solid var(--ink-600);
  font-size:.9375rem;
}
.site-footer::before{
  content:"";position:absolute;left:0;right:0;top:0;height:1px;pointer-events:none;
  background:linear-gradient(90deg,var(--cyan-400) 0%,transparent 42%,transparent 58%,var(--orange-500) 100%);
  opacity:.7;
}
.footer-inner{
  position:relative;z-index:1;
  width:100%;max-width:var(--shell);margin-inline:auto;
  padding:clamp(32px,5vw,60px) clamp(16px,4vw,44px) clamp(20px,3vw,34px);
}
.footer-top{
  display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);
  gap:clamp(24px,4vw,56px);
}
.footer-brand__note{
  margin-top:14px;max-width:34ch;
  font-size:.875rem;line-height:1.8;color:rgba(232,240,247,.62);
}
.footer-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,3vw,32px)}
.footer-col__title{
  padding-bottom:10px;margin-bottom:12px;
  border-bottom:1px solid var(--hair-ink);
  font-family:var(--font-mono);font-size:.75rem;font-weight:600;
  letter-spacing:.12em;color:rgba(155,243,228,.72);
}
.footer-col__list{display:flex;flex-direction:column;gap:8px}
.footer-col__link{
  display:inline-flex;align-items:center;gap:9px;
  font-size:.9375rem;color:rgba(232,240,247,.78);
  transition:color .2s var(--ease);
}
.footer-col__link::before{
  content:"";width:7px;height:1px;background:var(--cyan-400);opacity:.6;
}
.footer-col__link:hover{color:#fff}
.footer-col__link:hover::before{opacity:1}

.footer-contact{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1px;margin-top:clamp(26px,4vw,42px);
  border:1px solid var(--hair-ink);border-radius:var(--radius);
  overflow:hidden;background:rgba(30,74,110,.55);
}
.contact-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 12px;
  padding:16px 18px;background:rgba(8,19,31,.62);
}
.contact-row__label{
  flex:0 0 100%;
  font-family:var(--font-mono);font-size:.6875rem;letter-spacing:.12em;
  color:rgba(155,243,228,.62);
}
.contact-row__value{
  flex:1 1 auto;min-width:0;
  font-size:.875rem;color:#fff;word-break:break-word;
}

.footer-legal{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;
  margin-top:clamp(22px,3vw,32px);padding-top:18px;
  border-top:1px solid var(--hair-ink);
  font-family:var(--font-mono);font-size:.75rem;letter-spacing:.06em;
  color:rgba(232,240,247,.55);
}
.footer-legal__note{
  flex:1 1 320px;max-width:60ch;
  font-family:var(--font-sans);font-size:.8125rem;line-height:1.7;
  color:rgba(232,240,247,.5);
}
.footer-legal__sign{font-family:var(--font-mono)}

/* ---------- 13 滚动显现 ---------- */
html.has-js [data-reveal]{
  opacity:0;transform:translateY(16px);
  transition:opacity .24s ease-out,transform .24s ease-out;
}
html.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 14 响应式 ---------- */
@media (max-width:1080px){
  .header-tagline{display:none}
}
@media (max-width:900px){
  .header-upper{min-height:52px;padding-block:8px}
  .header-serial{display:none}
  .nav-toggle{display:inline-flex}
  .site-nav{
    order:3;flex:0 0 100%;flex-basis:100%;
    max-height:0;overflow:hidden;opacity:0;
    transition:max-height .3s var(--ease),opacity .2s var(--ease);
  }
  .site-nav[data-open]{
    max-height:min(72vh,560px);overflow-y:auto;opacity:1;
    margin-top:10px;padding-top:10px;
    border-top:1px solid var(--hair-ink);
  }
  .site-nav__list{flex-direction:column;flex-wrap:nowrap;gap:2px}
  .site-nav__link{
    width:100%;padding:12px 14px;font-size:var(--s-16);
    background:rgba(8,19,31,.5);border-color:rgba(30,74,110,.85);
  }
  .header-lower{flex-wrap:wrap;padding-block:8px}
  .header-tools{margin-left:auto}
  .col-4,.col-5,.col-7,.col-8{grid-column:span 12}
  .footer-top{grid-template-columns:minmax(0,1fr)}
  .footer-contact{grid-template-columns:minmax(0,1fr)}
}
@media (max-width:640px){
  html{font-size:93.75%}
  .footer-nav{grid-template-columns:repeat(auto-fit,minmax(132px,1fr))}
}
@media (max-width:560px){
  .readout__key{display:none}
  .readout{gap:4px;padding:6px 8px}
  .header-cta{padding:7px 12px;font-size:.75rem}
}

/* ---------- 15 动效降级 ---------- */
@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.has-js [data-reveal]{opacity:1;transform:none}
  .site-header[data-compact] .header-upper{transition:none}
  .chapter-rail__link.is-active{transform:none}
}