/* ==========================================================================
   杏悦地址 · 共享样式表 /assets/site.css
   复古帮助手册气质：奶油纸面 + 墨绿轨道 + 暖杏编号色块
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root{
  --ink:#2A211B;
  --ink-soft:#4A3F36;
  --green:#1F3D2B;
  --green-lift:#2A5240;
  --green-night:#152A1E;
  --apricot:#F2A65A;
  --apricot-deep:#C97B2E;
  --cream:#FBF6EC;
  --paper:#FFFDF8;
  --line:#E8E2D6;
  --line-dark:rgba(232,226,214,.16);
  --orange:#E4572E;
  --moss:#4A6B52;
  --gray-green:#7C8C7F;
  --rail-green-muted:#8FA392;
  --on-dark:#C9D2C6;
  --rail-w:232px;
  --wrap:1180px;
  --gutter:24px;
  --font-head:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono","SFMono-Regular",Consolas,"Courier New",monospace;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--cream);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{display:block;max-width:100%;height:auto;}
h1,h2,h3,h4,h5{font-family:var(--font-head);font-weight:600;line-height:1.28;margin:0;color:var(--green);}
p,ul,ol,figure{margin:0;}
ul,ol{padding-left:1.15em;}
a{color:inherit;}
button{font:inherit;color:inherit;}
table{border-collapse:collapse;}
[id]{scroll-margin-top:96px;}

:focus-visible{
  outline:3px solid var(--orange);
  outline-offset:3px;
  border-radius:2px;
}

.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0;
}

/* ---------- 排版基准 ---------- */
.display{
  font-family:var(--font-head);
  font-weight:600;
  font-size:clamp(2.6rem,7vw,5.4rem);
  line-height:1.06;
  letter-spacing:-.01em;
  color:var(--green);
}
.eyebrow{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.16em;
  color:var(--apricot-deep);
  text-transform:uppercase;
  margin:0 0 14px;
}
.prose{max-width:34em;}
.prose p{margin:0 0 1.15em;}
.prose p:last-child{margin-bottom:0;}
.prose strong{color:var(--green);}

/* ---------- 布局容器 ---------- */
.wrap{
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding:0 var(--gutter);
}
.page-main{display:block;}
.section{padding:96px 0;}
.section--tight{padding:64px 0;}

.grid{display:grid;gap:28px;}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr));}
.asym{
  display:grid;
  gap:48px;
  grid-template-columns:minmax(0,1.7fr) minmax(0,1fr);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 22px;
  border:1px solid transparent;
  border-radius:2px;
  font-size:15.5px;
  font-weight:600;
  line-height:1.4;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn-primary{background:var(--green);color:#FFF7EA;border-color:var(--green);}
.btn-primary:hover{background:var(--green-lift);border-color:var(--green-lift);}
.btn-accent{background:var(--apricot);color:#241A12;border-color:var(--apricot-deep);}
.btn-accent:hover{background:#E58C3C;border-color:var(--apricot-deep);color:#241A12;}
.btn-ghost{background:transparent;color:var(--green);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--apricot-deep);background:rgba(242,166,90,.14);}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--gray-green);
  margin:0 0 22px;
}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  list-style:none;
  margin:0;
  padding:0;
}
.breadcrumb li{display:flex;align-items:center;}
.breadcrumb li+li::before{content:"/";margin:0 10px;color:#C6CBBD;}
.breadcrumb a{color:var(--moss);text-decoration:none;}
.breadcrumb a:hover{color:var(--orange);text-decoration:underline;text-underline-offset:4px;}

/* ---------- 路径编号色块 ---------- */
.path-badge{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:34px;
  height:34px;
  flex:none;
  border-radius:2px;
  font-family:var(--font-mono);
  font-size:15px;
  font-weight:700;
  letter-spacing:.04em;
  background:var(--apricot);
  color:#241A12;
}
.path-badge--b{background:var(--moss);color:#F4F8F2;}
.path-badge--c{background:var(--ink);color:var(--apricot);}

/* ---------- 卡片 ---------- */
.card{
  position:relative;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:2px;
  padding:26px 24px;
}
.card--offset{margin-top:32px;}

/* ---------- 折叠面板 ---------- */
.panel{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:2px;
  margin:0 0 12px;
}
.panel summary{
  display:flex;
  align-items:center;
  gap:12px;
  padding:16px 20px;
  cursor:pointer;
  list-style:none;
  font-family:var(--font-head);
  font-size:17px;
  font-weight:600;
  color:var(--green);
}
.panel summary::-webkit-details-marker{display:none;}
.panel summary::before{
  content:"+";
  font-family:var(--font-mono);
  font-size:16px;
  color:var(--apricot-deep);
  flex:none;
}
.panel[open] summary::before{content:"–";}
.panel-body{
  padding:0 20px 20px;
  font-size:16px;
  color:var(--ink-soft);
}

/* ---------- 对照表 ---------- */
.table-wrap{
  overflow-x:auto;
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:2px;
}
table.data{width:100%;min-width:520px;font-size:15.5px;}
table.data th,
table.data td{
  text-align:left;
  padding:13px 16px;
  border-bottom:1px solid var(--line);
  vertical-align:top;
}
table.data th{
  background:#F4EFE2;
  font-family:var(--font-mono);
  font-size:12.5px;
  font-weight:500;
  letter-spacing:.08em;
  color:var(--green);
}
table.data tbody tr{cursor:pointer;transition:background-color .18s ease;}
table.data tbody tr:hover{background:rgba(242,166,90,.14);}
table.data tr:last-child td{border-bottom:0;}

/* ---------- 图片容器 ---------- */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16 / 10;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:2px;
  background:
    repeating-linear-gradient(135deg,rgba(31,61,43,.06) 0 12px,transparent 12px 24px),
    var(--paper);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{aspect-ratio:21 / 9;}
.media-frame--tall{aspect-ratio:3 / 4;}
.media-caption{
  margin:12px 0 0;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.06em;
  color:var(--gray-green);
}

/* ---------- 滚动显现 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .32s ease,transform .32s ease;
  transition-delay:var(--reveal-delay,0ms);
}
[data-reveal].is-revealed{opacity:1;transform:none;}

/* ==========================================================================
   头部
   ========================================================================== */
.site-header{position:relative;z-index:100;}
.skip-link{
  position:absolute;
  left:16px;
  top:-140px;
  z-index:200;
  padding:10px 18px;
  background:var(--green);
  color:#FFF7EA;
  border-radius:2px;
  font-size:15px;
  text-decoration:none;
  transition:top .18s ease;
}
.skip-link:focus{top:12px;}

/* --- 窄条品牌识别带 --- */
.brand-strip{
  position:sticky;
  top:0;
  z-index:100;
  background:var(--paper);
  border-bottom:1px solid var(--line);
}
.strip-inner{
  display:flex;
  align-items:center;
  gap:14px;
  max-width:var(--wrap);
  margin:0 auto;
  padding:11px var(--gutter);
}
.brand{
  display:flex;
  align-items:baseline;
  gap:10px;
  min-width:0;
  text-decoration:none;
  color:var(--green);
  font-family:var(--font-head);
  font-size:21px;
  font-weight:600;
  letter-spacing:.01em;
}
.brand-name{white-space:nowrap;}
.brand-name::before{
  content:"";
  display:inline-block;
  width:9px;
  height:9px;
  margin-right:9px;
  background:var(--apricot);
  vertical-align:2px;
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:11.5px;
  font-weight:400;
  letter-spacing:.1em;
  color:var(--gray-green);
  white-space:nowrap;
}
.strip-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin-left:auto;
  padding:8px 16px;
  background:var(--apricot);
  border:1px solid var(--apricot-deep);
  border-radius:2px;
  color:#241A12;
  font-size:14.5px;
  font-weight:600;
  text-decoration:none;
  white-space:nowrap;
  transition:background-color .18s ease,border-color .18s ease,color .18s ease;
}
.strip-cta::after{
  content:"→";
  font-family:var(--font-mono);
  font-size:13px;
  line-height:1;
}
.strip-cta:hover{background:var(--orange);border-color:var(--orange);color:#FFF7EA;}

.nav-toggle{
  display:inline-flex;
  flex-direction:column;
  justify-content:center;
  gap:4px;
  width:44px;
  height:40px;
  flex:none;
  padding:0 10px;
  background:var(--green);
  border:1px solid var(--green);
  border-radius:2px;
  cursor:pointer;
}
.nav-toggle-bar{
  display:block;
  height:2px;
  width:100%;
  background:#F4EEE1;
  transition:transform .2s ease,opacity .2s ease;
}
.site-header[data-open] .nav-toggle-bar:nth-child(1){transform:translateY(6px) rotate(45deg);}
.site-header[data-open] .nav-toggle-bar:nth-child(2){opacity:0;}
.site-header[data-open] .nav-toggle-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg);}

/* --- 侧边轨道导航 --- */
.rail{background:var(--green);color:#E8E2D3;}
.rail-label{
  margin:0 0 6px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--apricot);
}
.rail-list{
  display:flex;
  flex-direction:column;
  gap:2px;
  list-style:none;
  margin:0;
  padding:0;
}
.rail-link{
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:9px 12px;
  border-left:2px solid transparent;
  color:#D5CFBF;
  font-size:15px;
  line-height:1.5;
  text-decoration:none;
  transition:background-color .18s ease,color .18s ease,border-color .18s ease;
}
.rail-link:hover{color:#FFF7EA;background:rgba(242,166,90,.12);}
.rail-link[aria-current="page"]{
  color:#FFF7EA;
  background:rgba(242,166,90,.18);
  border-left-color:var(--apricot);
}
.rail-index{
  flex:none;
  font-family:var(--font-mono);
  font-size:12.5px;
  letter-spacing:.08em;
  color:var(--rail-green-muted);
}
.rail-link:hover .rail-index,
.rail-link[aria-current="page"] .rail-index{color:var(--apricot);}
.rail-text{flex:1 1 auto;}
.rail-note{
  margin:30px 0 0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--rail-green-muted);
}

/* --- 滚动进度 --- */
.scroll-progress{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  height:3px;
  z-index:85;
  background:var(--orange);
  transform:scaleX(var(--p,0));
  transform-origin:left center;
  pointer-events:none;
}

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer{
  margin-top:96px;
  background:var(--green-night);
  color:var(--on-dark);
}
.footer-inner{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.35fr;
  gap:34px 40px;
  max-width:var(--wrap);
  margin:0 auto;
  padding:64px var(--gutter) 44px;
}
.footer-col{min-width:0;}
.footer-brand{max-width:32ch;}
.footer-name{
  margin:0 0 12px;
  font-family:var(--font-head);
  font-size:22px;
  font-weight:600;
  color:#FFF7EA;
}
.footer-line{
  margin:0;
  font-size:15px;
  line-height:1.85;
  color:#A9B6A6;
}
.footer-title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:400;
  letter-spacing:.14em;
  color:var(--apricot);
  text-transform:uppercase;
}
.footer-list{
  display:flex;
  flex-direction:column;
  gap:9px;
  list-style:none;
  margin:0;
  padding:0;
}
.footer-list li{
  font-size:15px;
  line-height:1.7;
  color:#9FAD9C;
}
.footer-list a{
  color:var(--on-dark);
  text-decoration:none;
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:color .18s ease,border-color .18s ease;
}
.footer-list a:hover{color:#FFF7EA;border-bottom-color:var(--apricot);}
.footer-meta li{color:#9FAD9C;}
.footer-base{
  display:flex;
  flex-wrap:wrap;
  gap:10px 28px;
  justify-content:space-between;
  max-width:var(--wrap);
  margin:0 auto;
  padding:22px var(--gutter) 40px;
  border-top:1px solid var(--line-dark);
  font-size:13.5px;
  line-height:1.8;
  color:var(--rail-green-muted);
}
.footer-base p{margin:0;}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (min-width:1024px){
  body{padding-left:var(--rail-w);}
  .rail{
    position:fixed;
    top:0;
    right:auto;
    bottom:0;
    left:0;
    z-index:60;
    display:flex;
    flex-direction:column;
    width:var(--rail-w);
    padding:32px 18px 26px;
    overflow-y:auto;
  }
  .rail-note{margin-top:auto;}
  .nav-toggle{display:none;}
}

@media (max-width:1023px){
  .rail{
    position:fixed;
    top:0;
    bottom:0;
    left:0;
    z-index:90;
    display:flex;
    flex-direction:column;
    width:min(320px,84vw);
    padding:96px 20px 30px;
    background:var(--green-night);
    overflow-y:auto;
    visibility:hidden;
    transform:translateX(-104%);
    box-shadow:22px 0 48px -28px rgba(21,42,30,.75);
    transition:transform .28s ease,visibility .28s ease;
  }
  .site-header[data-open] .rail{transform:translateX(0);visibility:visible;}
  .rail-link{padding:12px 12px;font-size:16px;}
  .rail-note{margin-top:30px;}
  body[data-nav-open]{overflow:hidden;}
  .footer-inner{grid-template-columns:1fr 1fr;padding:52px var(--gutter) 36px;}
}

@media (max-width:900px){
  .asym,
  .grid-2,
  .grid-3{grid-template-columns:1fr;}
  .asym{gap:34px;}
  .section{padding:72px 0;}
  .section--tight{padding:52px 0;}
}

@media (max-width:640px){
  body{font-size:16.5px;}
  .brand-sub{display:none;}
  .strip-inner{padding:10px 16px;}
  .brand{font-size:19px;}
  .footer-inner{grid-template-columns:1fr;gap:30px;padding:44px 16px 30px;}
  .footer-base{flex-direction:column;padding:20px 16px 34px;}
  .wrap{padding:0 16px;}
  .section{padding:56px 0;}
  .media-frame{aspect-ratio:4 / 3;}
}

/* ==========================================================================
   无障碍 / 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;
  }
  [data-reveal]{opacity:1 !important;transform:none !important;}
  .scroll-progress{display:none;}
}