/* =========================================================
   永兴路线 · 共享样式 /assets/site.css
   路线分列 · 命令栏 · 等宽编号 · 直角细线
   ========================================================= */

/* ---------- 01 变量 ---------- */
:root{
  --c-base:#F5F2E9;
  --c-rock:#E4DFD2;
  --c-ink:#171916;
  --c-moss:#33452F;
  --c-terra:#6F9A56;
  --c-plateau:#2B4E72;
  --c-pottery:#B04A34;
  --c-alert:#D97B26;
  --c-steel:#8B8B83;
  --c-slate:#5C6B78;

  --line-ink:rgba(23,25,22,.16);
  --line-ink-2:rgba(23,25,22,.3);
  --line-cream:rgba(245,242,233,.22);
  --cream:rgba(245,242,233,.66);

  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Source Han Sans SC","Helvetica Neue",Arial,system-ui,sans-serif;
  --font-mono:ui-monospace,"SF Mono","Cascadia Mono","JetBrains Mono","Sarasa Mono SC",Menlo,Consolas,"Courier New",monospace;

  --max:1280px;
  --gutter:24px;
  --bar-h:56px;
  --bar-h-sm:40px;
  --dur:.2s;
}

/* ---------- 02 reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:76px;}
body{
  margin:0;
  background:var(--c-base);
  color:var(--c-ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote,dl,dd{margin:0;}
ul,ol{padding:0;}
img,svg,video{max-width:100%;}
button{font:inherit;color:inherit;background:none;border:0;}
a{color:var(--c-plateau);text-decoration:none;text-underline-offset:.22em;}
a:hover{text-decoration:underline;}
hr{border:0;border-top:1px solid var(--line-ink);margin:0;}
:focus-visible{outline:2px solid var(--c-alert);outline-offset:2px;}
#main-content{display:block;outline:none;}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    transition-duration:.001ms !important;
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
  }
}

/* ---------- 03 跳转链接 ---------- */
.skip-link{
  position:fixed;left:14px;top:10px;z-index:200;
  padding:10px 16px;
  background:var(--c-ink);color:var(--c-base);
  font-size:14px;letter-spacing:.06em;
  transform:translateY(-180%);
  transition:transform var(--dur) ease;
}
.skip-link:focus{transform:none;text-decoration:none;}

/* ---------- 04 命令栏头部 ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  background:var(--c-moss);
  color:var(--c-base);
  border-bottom:1px solid var(--line-cream);
}
.cmdbar{min-height:var(--bar-h);}
.cmdbar__inner{
  display:flex;align-items:stretch;flex-wrap:wrap;
  height:100%;
}

.brand{
  display:flex;align-items:center;gap:10px;
  padding-right:16px;
  color:var(--c-base);text-decoration:none;flex:0 0 auto;
}
.brand:hover{text-decoration:none;}
.brand__code{
  font-size:10px;letter-spacing:.16em;line-height:1.6;
  color:var(--c-terra);
  border:1px solid var(--c-terra);
  padding:1px 6px;
  white-space:nowrap;
}
.brand__name{font-size:17px;font-weight:800;letter-spacing:.08em;color:var(--c-base);white-space:nowrap;}
.brand__tag{font-size:11px;letter-spacing:.16em;color:var(--cream);white-space:nowrap;}

.cmdnav{display:none;align-items:stretch;margin-left:auto;}
.cmdnav__list{display:flex;align-items:stretch;list-style:none;}
.cmdnav__item{display:flex;}
.cmdnav__link{
  display:inline-flex;align-items:center;gap:6px;
  padding:0 13px;
  color:rgba(245,242,233,.8);
  font-size:13.5px;letter-spacing:.05em;white-space:nowrap;
  border-bottom:2px solid transparent;
  transition:color var(--dur) ease,background-color var(--dur) ease,border-color var(--dur) ease;
}
.cmdnav__link:hover{color:#fff;background:rgba(245,242,233,.08);text-decoration:none;}
.cmdnav__num{font-size:10px;letter-spacing:.08em;color:rgba(245,242,233,.42);transition:color var(--dur) ease;}
.cmdnav__link:hover .cmdnav__num{color:var(--c-terra);}
.cmdnav__link[aria-current="page"]{color:#fff;border-bottom-color:var(--c-terra);}
.cmdnav__link[aria-current="page"] .cmdnav__num{color:var(--c-terra);}
.cmdnav__label{display:inline-block;}

.cmdtools{display:none;align-items:center;gap:8px;padding-left:14px;flex:0 0 auto;}
.cmdtool{
  display:inline-flex;align-items:baseline;gap:6px;
  padding:6px 11px;
  border:1px solid rgba(245,242,233,.34);
  color:var(--c-base);font-size:12.5px;letter-spacing:.06em;white-space:nowrap;
  transition:background-color var(--dur) ease,color var(--dur) ease,border-color var(--dur) ease;
}
.cmdtool:hover{background:var(--c-base);color:var(--c-moss);text-decoration:none;}
.cmdtool__key{font-size:10px;letter-spacing:.14em;color:var(--c-terra);}
.cmdtool:hover .cmdtool__key{color:var(--c-pottery);}
.cmdtool__val{display:inline-block;}
.cmdtool--alert{background:var(--c-alert);border-color:var(--c-alert);color:#1B1206;font-weight:700;}
.cmdtool--alert .cmdtool__key{color:#4A2A08;}
.cmdtool--alert:hover{background:#EE9A46;border-color:#EE9A46;color:#1B1206;}

.navtoggle{
  display:inline-flex;align-items:center;gap:9px;
  margin-left:auto;
  padding:7px 11px;
  border:1px solid rgba(245,242,233,.4);
  color:var(--c-base);
  font-size:12px;letter-spacing:.14em;
  cursor:pointer;
  transition:background-color var(--dur) ease,color var(--dur) ease;
}
.navtoggle:hover{background:rgba(245,242,233,.1);}
.navtoggle__glyph{display:inline-flex;flex-direction:column;justify-content:center;gap:4px;width:14px;}
.navtoggle__glyph span{display:block;height:1.5px;background:currentColor;}
.navtoggle__label{display:inline-block;}

.readbar{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:rgba(245,242,233,.14);
}
.readbar__fill{display:block;height:100%;width:0;background:var(--c-terra);}

/* 桌面命令栏 */
@media (min-width:961px){
  .cmdbar{height:var(--bar-h);transition:height var(--dur) ease;}
  .site-header[data-scrolled="true"] .cmdbar{height:var(--bar-h-sm);}
  .site-header[data-scrolled="true"] .brand__tag{display:none;}
  .cmdnav{display:flex;}
  .cmdtools{display:flex;}
  .navtoggle{display:none;}
}

/* 移动端命令栏：data-open 展开 */
@media (max-width:960px){
  .cmdbar__inner{align-items:center;}
  .brand{padding-block:13px;}
  .brand__tag{display:none;}
  .cmdnav{
    display:none;flex-basis:100%;width:100%;margin-left:0;
    border-top:1px solid var(--line-cream);
  }
  .site-header[data-open="true"] .cmdnav{display:block;}
  .cmdnav__list{flex-direction:column;align-items:stretch;}
  .cmdnav__link{
    height:auto;padding:12px 2px;
    border-bottom:1px solid rgba(245,242,233,.14);
    border-left:2px solid transparent;
    font-size:15px;
  }
  .cmdnav__link[aria-current="page"]{border-bottom-color:rgba(245,242,233,.14);border-left-color:var(--c-terra);}
  .cmdtools{
    display:none;flex-basis:100%;width:100%;
    flex-wrap:wrap;gap:10px;padding:14px 0 18px;
    border-top:1px solid var(--line-cream);
  }
  .site-header[data-open="true"] .cmdtools{display:flex;}
  .cmdtool{padding:9px 14px;font-size:13.5px;}
}

@media (max-width:520px){
  :root{--gutter:18px;}
  .brand__code{font-size:9px;letter-spacing:.1em;}
  .brand__name{font-size:15.5px;letter-spacing:.06em;}
  .navtoggle__label{display:none;}
}

/* ---------- 05 页脚 ---------- */
.site-footer{
  background:var(--c-moss);
  color:var(--c-base);
  border-top:3px solid var(--c-terra);
}
.footer__inner{padding-block:54px 0;}
.footer__grid{
  display:grid;
  grid-template-columns:1fr;
  gap:34px;
}
.footer__brand{display:grid;gap:10px;align-content:start;}
.footer__code{
  display:inline-block;justify-self:start;
  font-size:10.5px;letter-spacing:.16em;
  color:var(--c-terra);
  border:1px solid var(--c-terra);
  padding:2px 7px;
}
.footer__brandname{font-size:22px;font-weight:800;letter-spacing:.1em;color:var(--c-base);}
.footer__brandmeta{font-size:12.5px;line-height:1.9;letter-spacing:.08em;color:var(--cream);}
.footer__col{display:block;}
.footer__coltitle{
  font-family:var(--font-mono);
  font-size:11px;font-weight:400;letter-spacing:.26em;
  color:var(--c-terra);
  margin-bottom:14px;
}
.footer__list{list-style:none;display:grid;gap:9px;}
.footer__link{
  color:rgba(245,242,233,.82);
  font-size:14px;letter-spacing:.03em;
  border-bottom:1px solid transparent;
  transition:color var(--dur) ease,border-color var(--dur) ease;
}
.footer__link:hover{color:#fff;border-bottom-color:var(--c-terra);text-decoration:none;}
.footer__text{color:rgba(245,242,233,.5);font-size:14px;letter-spacing:.03em;}

.footer__meta{
  margin-top:44px;
  padding:22px 0 30px;
  border-top:1px solid var(--line-cream);
  display:grid;gap:12px;
  font-size:12.5px;line-height:1.85;
  color:var(--cream);
}
.footer__note{letter-spacing:.08em;}
.footer__contact{max-width:88ch;}
.footer__legal{display:flex;flex-wrap:wrap;gap:20px;}
.footer__legalink{
  color:rgba(245,242,233,.82);
  border-bottom:1px solid rgba(245,242,233,.34);
  letter-spacing:.06em;
}
.footer__legalink:hover{color:#fff;border-bottom-color:var(--c-terra);text-decoration:none;}
.footer__copy{letter-spacing:.06em;color:rgba(245,242,233,.55);}

@media (min-width:620px){
  .footer__grid{grid-template-columns:1fr 1fr;}
  .footer__brand{grid-column:1 / -1;}
}
@media (min-width:960px){
  .footer__inner{padding-block:64px 0;}
  .footer__grid{grid-template-columns:1.7fr 1fr 1.2fr 1.2fr 1fr;gap:28px;}
  .footer__brand{grid-column:auto;}
}

/* ---------- 06 容器与网格 ---------- */
.wrap{
  width:100%;max-width:var(--max);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.wrap--narrow{max-width:840px;}

.grid-12{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:var(--gutter);}
.grid-12 > *{grid-column:span 12;min-width:0;}
@media (min-width:760px){
  .span-3{grid-column:span 3;}
  .span-4{grid-column:span 4;}
  .span-5{grid-column:span 5;}
  .span-6{grid-column:span 6;}
  .span-7{grid-column:span 7;}
  .span-8{grid-column:span 8;}
  .span-9{grid-column:span 9;}
  .span-12{grid-column:span 12;}
}
@media (min-width:1080px){
  .shift-1{margin-left:8.3333%;}
  .shift-2{margin-left:16.6666%;}
}

/* ---------- 07 章节 ---------- */
.section{padding-block:clamp(52px,7vw,96px);}
.section--rock{background:var(--c-rock);}
.section--moss{background:var(--c-moss);color:var(--c-base);}
.section--moss .lead,.section--moss .body-sm{color:var(--cream);}
.section--moss .anno{color:rgba(245,242,233,.6);}
.section--line{border-top:1px solid var(--line-ink);}
.section--tight{padding-block:clamp(28px,3vw,44px);}

.sec-head{
  display:grid;grid-template-columns:auto minmax(0,1fr);
  gap:16px;align-items:start;
  margin-bottom:clamp(24px,3vw,40px);
}
.sec-head__num{
  font-family:var(--font-mono);
  font-size:12px;letter-spacing:.2em;
  color:var(--c-pottery);
  padding-top:.6em;
}
.sec-head__title{
  font-size:clamp(28px,4vw,56px);
  line-height:1.04;
  font-weight:900;
  letter-spacing:-.02em;
}

/* ---------- 08 中文排版 ---------- */
.display{
  font-size:clamp(40px,7vw,104px);
  line-height:.98;
  font-weight:900;
  letter-spacing:-.03em;
  margin:0;
}
.display--thin{font-weight:200;letter-spacing:-.01em;}
.ttl{
  font-size:clamp(26px,3.4vw,44px);
  line-height:1.06;
  font-weight:900;
  letter-spacing:-.02em;
  margin:0;
}
.ttl--sm{font-size:clamp(19px,2vw,26px);line-height:1.24;font-weight:800;letter-spacing:-.01em;}
.data-fig{
  font-family:var(--font-mono);
  font-size:clamp(32px,4.6vw,64px);
  line-height:1;
  letter-spacing:.04em;
  font-weight:500;
  display:block;
}
.data-fig--sm{font-size:clamp(22px,2.6vw,32px);}
.mono{font-family:var(--font-mono);letter-spacing:.04em;font-variant-numeric:tabular-nums;}
.anno{
  font-family:var(--font-mono);
  font-size:11.5px;
  letter-spacing:.3em;
  color:var(--c-slate);
  text-transform:uppercase;
}
.anno--v{
  writing-mode:vertical-rl;
  letter-spacing:.34em;
  text-transform:none;
  line-height:1;
}
.lead{font-size:clamp(17px,1.6vw,20px);line-height:1.85;max-width:62ch;}
.body-sm{font-size:13.5px;line-height:1.8;color:var(--c-slate);max-width:66ch;}
.prose{max-width:68ch;font-size:16.5px;line-height:1.95;}
.prose > * + *{margin-top:1.05em;}
.prose h2{font-size:clamp(20px,2vw,26px);line-height:1.3;font-weight:800;margin-top:1.9em;letter-spacing:-.01em;}
.prose h3{font-size:17px;font-weight:800;margin-top:1.6em;letter-spacing:.02em;}
.prose ul,.prose ol{padding-left:1.3em;}
.prose li + li{margin-top:.45em;}
.prose .anno{display:block;margin-bottom:.9em;}

/* ---------- 09 面包屑 ---------- */
.crumbs{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  padding-block:20px;
  font-family:var(--font-mono);
  font-size:11.5px;letter-spacing:.16em;
  color:var(--c-slate);
}
.crumbs a{color:var(--c-slate);border-bottom:1px solid rgba(92,107,120,.42);}
.crumbs a:hover{color:var(--c-plateau);border-bottom-color:var(--c-plateau);text-decoration:none;}
.crumbs__sep{color:var(--c-steel);}
.crumbs [aria-current="page"]{color:var(--c-ink);}

/* ---------- 10 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:13px 22px;
  border:1px solid var(--c-ink);
  background:transparent;color:var(--c-ink);
  font-size:14.5px;letter-spacing:.06em;
  cursor:pointer;
  transition:background-color var(--dur) ease,color var(--dur) ease,border-color var(--dur) ease;
}
.btn:hover{background:var(--c-ink);color:var(--c-base);text-decoration:none;}
.btn--solid{background:var(--c-ink);color:var(--c-base);}
.btn--solid:hover{background:var(--c-moss);border-color:var(--c-moss);}
.btn--action{background:var(--c-pottery);border-color:var(--c-pottery);color:#FFF4F0;font-weight:700;}
.btn--action:hover{background:#8E3A28;border-color:#8E3A28;color:#FFF4F0;}
.btn--alert{background:var(--c-alert);border-color:var(--c-alert);color:#1B1206;font-weight:700;}
.btn--alert:hover{background:#B9631A;border-color:#B9631A;color:#1B1206;}
.btn--line{border-color:var(--line-ink-2);}
.btn--moss{background:var(--c-moss);border-color:var(--c-moss);color:var(--c-base);}
.btn--moss:hover{background:var(--c-terra);border-color:var(--c-terra);color:#12200C;}

/* ---------- 11 场景色标与筛选 ---------- */
[data-scene]{--sc:var(--c-steel);}
[data-scene="terrace"]{--sc:#6F9A56;}
[data-scene="plateau"]{--sc:#2B4E72;}
[data-scene="pottery"]{--sc:#B04A34;}
[data-scene="alert"]{--sc:#D97B26;}
[data-scene="moss"]{--sc:#33452F;}
[data-scene="steel"]{--sc:#8B8B83;}

.chipbar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:clamp(20px,2.6vw,32px);}
.chip{
  display:inline-flex;align-items:center;gap:9px;
  padding:8px 14px;
  border:1px solid var(--line-ink-2);
  background:transparent;color:var(--c-ink);
  font-size:13px;letter-spacing:.05em;
  cursor:pointer;
  transition:background-color var(--dur) ease,color var(--dur) ease,border-color var(--dur) ease;
}
.chip:hover{background:var(--c-rock);}
.chip__dot{width:10px;height:10px;flex:0 0 auto;background:var(--sc);}
.chip[aria-pressed="true"]{background:var(--c-ink);border-color:var(--c-ink);color:var(--c-base);}
.chip[aria-pressed="true"] .chip__dot{outline:1px solid rgba(245,242,233,.6);outline-offset:1px;}

/* ---------- 12 服务路径（技能树） ---------- */
.pathway{
  list-style:none;
  border-left:1px solid var(--line-ink-2);
  margin:0;padding:0 0 0 26px;
}
.node{
  position:relative;
  border-bottom:1px solid var(--line-ink);
}
.node::before{
  content:"";position:absolute;left:-30.5px;top:26px;
  width:8px;height:8px;
  background:var(--c-base);
  border:1px solid var(--c-ink);
}
.node[open]::before{background:var(--c-terra);border-color:var(--c-terra);}
.node > summary{
  display:flex;align-items:baseline;gap:14px;
  padding:20px 0;
  cursor:pointer;list-style:none;
}
.node > summary::-webkit-details-marker{display:none;}
.node > summary:hover .node__title{color:var(--c-pottery);}
.node__idx{font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--c-pottery);}
.node__title{font-size:17px;font-weight:700;letter-spacing:.02em;transition:color var(--dur) ease;}
.node__body{padding:0 0 22px 0;font-size:14px;line-height:1.85;color:var(--c-slate);max-width:62ch;}
.node__body > * + *{margin-top:.8em;}

/* ---------- 13 对照表与数据行 ---------- */
.table-scroll{width:100%;overflow-x:auto;}
.cmp{width:100%;border-collapse:collapse;font-size:14.5px;min-width:520px;}
.cmp th,.cmp td{text-align:left;vertical-align:top;padding:14px 16px;border-bottom:1px solid var(--line-ink);}
.cmp thead th{
  font-family:var(--font-mono);font-size:11.5px;font-weight:400;
  letter-spacing:.2em;color:var(--c-slate);
  border-bottom:1px solid var(--c-ink);
}
.cmp tbody tr{transition:background-color var(--dur) ease;}
.cmp tbody tr:hover{background:var(--c-rock);}

.facts{list-style:none;}
.facts li{
  display:flex;justify-content:space-between;align-items:baseline;gap:20px;
  padding:13px 0;
  border-bottom:1px solid var(--line-ink);
  font-size:14.5px;
}
.facts__k{color:var(--c-slate);}
.facts__v{font-family:var(--font-mono);letter-spacing:.04em;text-align:right;}

/* ---------- 14 图位容器 ---------- */
.media{display:block;}
.media__frame{
  position:relative;
  width:100%;
  aspect-ratio:4/3;
  background:var(--c-rock);
  border:1px solid var(--line-ink-2);
  overflow:hidden;
}
.media__frame > img,
.media__frame > svg,
.media__frame > picture,
.media__frame > picture > img{
  position:absolute;inset:0;
  width:100%;height:100%;
  object-fit:cover;display:block;
}
.media--wide .media__frame{aspect-ratio:16/9;}
.media--tall .media__frame{aspect-ratio:3/4;}
.media--square .media__frame{aspect-ratio:1/1;}
.media--blank .media__frame{
  background-image:repeating-linear-gradient(-45deg,transparent 0 11px,rgba(139,139,131,.24) 11px 12px);
}
.media__placeholder{
  position:absolute;left:0;right:0;bottom:0;
  padding:8px 10px;
  font-family:var(--font-mono);
  font-size:10.5px;letter-spacing:.24em;color:var(--c-slate);
  background:linear-gradient(rgba(245,242,233,0),rgba(245,242,233,.92));
}
.media__cap{
  margin-top:9px;
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.14em;color:var(--c-slate);
}
@media (min-width:960px){
  .media--push{margin-top:-28px;}
}

/* ---------- 15 章节轨道（页面可选） ---------- */
.chapter-rail{
  position:fixed;right:22px;top:50%;z-index:70;
  transform:translateY(-50%);
  display:none;flex-direction:column;gap:12px;
  list-style:none;margin:0;padding:0;
}
@media (min-width:1440px){.chapter-rail{display:flex;}}
.chapter-rail__link{
  display:flex;align-items:center;gap:9px;
  font-family:var(--font-mono);
  font-size:10.5px;letter-spacing:.18em;
  color:var(--c-steel);
}
.chapter-rail__link:hover{color:var(--c-ink);text-decoration:none;}
.chapter-rail__link::before{
  content:"";width:16px;height:1px;background:currentColor;
  transition:width var(--dur) ease;
}
.chapter-rail__link[data-active="true"]{color:var(--c-pottery);}
.chapter-rail__link[data-active="true"]::before{width:32px;}

/* ---------- 16 显现动效 ---------- */
[data-reveal]{transition:opacity var(--dur) ease,transform var(--dur) ease;}
html[data-motion="on"] [data-reveal]{opacity:0;transform:translateY(8px);}
html[data-motion="on"] [data-reveal].is-in{opacity:1;transform:none;}

/* ---------- 17 通用辅助 ---------- */
.stack-sm > * + *{margin-top:12px;}
.stack-md > * + *{margin-top:22px;}
.stack-lg > * + *{margin-top:38px;}
.hairline{border-top:1px solid var(--line-ink);}
.full-bleed{width:100%;}