@charset "UTF-8";
/* ============================================================
   筑家笔记　｜　视觉系统
   纸白 · 墨黑 · 赭石，宋体标题 + 无衬线正文
   ============================================================ */

:root{
  --paper:#F4F5F0;
  --paper-2:#E7E9E1;
  --paper-3:#DDE1D6;
  --ink:#141813;
  --ink-2:#3F463F;
  --ink-3:#767F6E;
  --line:#D4D8CB;
  --line-soft:#E2E5DC;
  --accent:#3C5643;
  --accent-2:#6E8A75;
  --green:#2F4636;

  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong","SimSun",serif;
  --sans:-apple-system,BlinkMacSystemFont,"Inter","Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;

  --w:1240px;
  --gutter:clamp(20px,5vw,64px);
  --r:2px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:104px}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.8;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
/* 极细纸纹 */
body::before{
  content:"";position:fixed;inset:0;z-index:1;pointer-events:none;opacity:.35;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='.035'/%3E%3C/svg%3E");
}
main,header,footer{position:relative;z-index:2}

img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer}
::selection{background:var(--accent);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}

h1,h2,h3,h4{font-family:var(--serif);font-weight:500;margin:0;line-height:1.28;letter-spacing:.01em}
p{margin:0;text-wrap:pretty}
li,dd{text-wrap:pretty}
ul,ol{margin:0;padding:0;list-style:none}

/* ---------- 版心 ---------- */
.wrap{width:100%;max-width:var(--w);margin:0 auto;padding:0 var(--gutter)}
.narrow{max-width:860px}

/* ---------- 顶栏 ---------- */
.site-head{
  position:sticky;top:0;z-index:60;
  background:rgba(244,245,240,.86);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line-soft);
}
.head-in{display:flex;align-items:center;gap:clamp(16px,3vw,48px);height:76px}
.brand{display:flex;align-items:baseline;gap:10px;flex-shrink:0}
.brand-mark{font-family:var(--serif);font-size:1.5rem;letter-spacing:.16em;line-height:1}
.brand-sub{font-size:.68rem;letter-spacing:.22em;color:var(--ink-3);text-transform:uppercase}
.nav{display:flex;align-items:center;gap:clamp(18px,2.4vw,38px);margin-left:auto}
.nav a{
  font-size:.92rem;color:var(--ink-2);letter-spacing:.06em;position:relative;padding:6px 0;
  transition:color .25s var(--ease);
}
.nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease);
}
.nav a:hover{color:var(--ink)}
.nav a:hover::after,.nav a[aria-current="page"]::after{transform:scaleX(1)}
.nav a[aria-current="page"]{color:var(--ink)}
.head-tools{display:flex;align-items:center;gap:8px;margin-left:8px}
/* 顶栏搜索（显眼位置） */
.head-search{
  display:flex;align-items:center;gap:10px;height:40px;padding:0 10px 0 14px;margin-left:4px;
  background:var(--paper-2);border:1px solid var(--line);border-radius:100px;
  transition:border-color .25s,background .25s;
}
.head-search:hover{border-color:var(--ink-3);background:#E3E6DB}
.head-search svg{width:15px;height:15px;stroke:var(--ink-3);fill:none;stroke-width:1.6}
.head-search span{font-size:.82rem;color:var(--ink-3);letter-spacing:.06em;white-space:nowrap}
.head-search kbd{
  font-family:var(--sans);font-size:.64rem;color:var(--ink-3);letter-spacing:.06em;
  border:1px solid var(--line);background:var(--paper);border-radius:3px;padding:1px 5px;
}
.icon-btn{
  width:40px;height:40px;display:grid;place-items:center;background:none;border:1px solid transparent;
  border-radius:50%;transition:border-color .25s,background .25s;
}
.icon-btn:hover{border-color:var(--line);background:var(--paper-2)}
.icon-btn svg{width:17px;height:17px;stroke:var(--ink);fill:none;stroke-width:1.5}
.nav-toggle{display:none}
.search-ico{display:none}

/* ---------- 首页主视觉 ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line-soft)}
.hero-grid{
  display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(24px,4vw,72px);
  align-items:center;padding-top:clamp(48px,7vw,96px);padding-bottom:clamp(40px,6vw,80px);
}
.kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-size:.72rem;letter-spacing:.26em;color:var(--ink-3);text-transform:uppercase;
}
.kicker::before{content:"";width:28px;height:1px;background:var(--accent)}
.hero h1{
  font-size:clamp(2.5rem,5.4vw,4.4rem);letter-spacing:.02em;margin:22px 0 0;line-height:1.16;
}
.hero h1 em{font-style:normal;color:var(--accent);position:relative;white-space:nowrap}
.hero-lead{
  margin-top:26px;max-width:30em;color:var(--ink-2);font-size:clamp(.98rem,1.15vw,1.08rem);
  line-height:1.95;font-weight:300;
}
.hero-sub{
  display:block;margin-top:16px;font-size:.84em;color:var(--ink-3);letter-spacing:.04em;
}
.hero-acts{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px}.hero-meta{
  display:flex;flex-wrap:wrap;gap:clamp(24px,3vw,54px);margin-top:clamp(36px,5vw,64px);
  padding-top:26px;border-top:1px solid var(--line);
}
.hero-meta div{font-size:.8rem;color:var(--ink-3);letter-spacing:.06em}
.hero-meta strong{
  display:block;font-family:var(--serif);font-size:1.55rem;color:var(--ink);
  font-weight:500;letter-spacing:.02em;margin-bottom:2px;
}

/* 立面插画 */
.hero-art{position:relative}
.hero-art svg{width:100%;height:auto;display:block}
.art-cap{
  display:flex;justify-content:space-between;gap:16px;margin-top:14px;
  font-size:.7rem;color:var(--ink-3);letter-spacing:.14em;
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:12px;height:52px;padding:0 28px;
  border:1px solid var(--ink);background:var(--ink);color:var(--paper);
  font-size:.9rem;letter-spacing:.1em;border-radius:var(--r);
  transition:background .3s var(--ease),color .3s var(--ease),transform .3s var(--ease);
}
.btn:hover{background:var(--accent);border-color:var(--accent);transform:translateY(-2px)}
.btn svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:1.6;transition:transform .3s var(--ease)}
.btn:hover svg{transform:translateX(4px)}
.btn-ghost{background:none;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}

/* ---------- 区块标题 ---------- */
.section{padding-block:clamp(56px,8vw,112px)}
.section.tight{padding-block:clamp(40px,5vw,72px)}
.sec-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:32px;
  padding-bottom:26px;border-bottom:1px solid var(--line);margin-bottom:clamp(32px,4vw,56px);
}
.sec-head h2{font-size:clamp(1.65rem,3vw,2.5rem);letter-spacing:.03em}
.sec-head p{color:var(--ink-3);font-size:.86rem;letter-spacing:.08em;margin-top:10px}
.sec-more{
  font-size:.85rem;color:var(--ink-2);letter-spacing:.08em;display:inline-flex;align-items:center;gap:8px;
  white-space:nowrap;padding-bottom:4px;border-bottom:1px solid var(--line);
  transition:color .25s,border-color .25s;
}
.sec-more:hover{color:var(--accent);border-color:var(--accent)}

/* ---------- 三大入口 ---------- */
.entries{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--line)}
.entry{
  position:relative;padding:clamp(28px,3vw,44px) clamp(20px,2.6vw,38px) clamp(30px,3vw,40px);
  border-bottom:1px solid var(--line);border-right:1px solid var(--line);
  transition:background .4s var(--ease);overflow:hidden;
}
.entry:nth-child(3n){border-right:none}
.entry::after{
  content:"";position:absolute;left:0;top:0;height:2px;width:100%;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform .5s var(--ease);
}
.entry:hover{background:var(--paper-2)}
.entry:hover::after{transform:scaleX(1)}
.entry-no{
  font-family:var(--serif);font-size:.78rem;letter-spacing:.2em;color:var(--accent);
  display:block;margin-bottom:clamp(28px,4vw,52px);
}
.entry h3{font-size:clamp(1.3rem,1.8vw,1.6rem);letter-spacing:.04em;margin-bottom:12px}
.entry p{color:var(--ink-2);font-size:.92rem;line-height:1.85;font-weight:300;min-height:3.4em}
.entry-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:22px}
.entry-tags span{
  font-size:.7rem;letter-spacing:.08em;color:var(--ink-3);
  border:1px solid var(--line);border-radius:100px;padding:3px 10px;
}
.entry-go{
  margin-top:26px;display:inline-flex;align-items:center;gap:8px;
  font-size:.8rem;letter-spacing:.14em;color:var(--ink);
}
.entry-go svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.6;transition:transform .35s var(--ease)}
.entry:hover .entry-go svg{transform:translateX(5px)}

/* ---------- 流程时间轴 ---------- */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.flow-step{
  background:var(--paper);padding:clamp(20px,2.2vw,30px);min-height:150px;
  transition:background .35s var(--ease);position:relative;
}
.flow-step:hover{background:var(--paper-2)}
.flow-step span{font-family:var(--serif);font-size:.72rem;color:var(--accent);letter-spacing:.14em}
.flow-step h4{font-size:1rem;margin:14px 0 8px;letter-spacing:.04em}
.flow-step p{font-size:.78rem;color:var(--ink-3);line-height:1.7}

/* ---------- 通用卡片 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(18px,2vw,28px)}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(18px,2vw,28px)}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(14px,1.6vw,22px)}

.card{
  border:1px solid var(--line);background:var(--paper);border-radius:var(--r);
  transition:border-color .35s var(--ease),transform .35s var(--ease),box-shadow .35s var(--ease);
}
.card:hover{border-color:var(--ink-3);transform:translateY(-3px);box-shadow:0 18px 40px -30px rgba(26,26,24,.5)}

/* 设计师卡 */
.d-card{padding:0;overflow:hidden;display:flex;flex-direction:column}
.d-top{
  display:flex;gap:16px;align-items:flex-start;padding:24px 24px 20px;
  border-bottom:1px solid var(--line-soft);
}
.avatar{
  width:64px;height:64px;flex-shrink:0;border-radius:50%;display:grid;place-items:center;
  font-family:var(--serif);font-size:1.2rem;letter-spacing:.04em;color:var(--paper);
  background:linear-gradient(150deg,#2F4636,#141813);
}
.avatar.alt1{background:linear-gradient(150deg,#3C5643,#7A3218)}
.avatar.alt2{background:linear-gradient(150deg,#6B6357,#3A3730)}
.avatar.alt3{background:linear-gradient(150deg,#8A7052,#5A4531)}
.d-name{font-family:var(--serif);font-size:1.15rem;letter-spacing:.06em}
.d-title{font-size:.76rem;color:var(--ink-3);letter-spacing:.08em;margin-top:4px}
.d-body{padding:20px 24px 24px;display:flex;flex-direction:column;gap:14px;flex:1}
.d-intro{font-size:.86rem;color:var(--ink-2);line-height:1.8;font-weight:300;flex:1}
.d-rows{display:flex;flex-direction:column;gap:8px;padding-top:14px;border-top:1px solid var(--line-soft)}
.d-row{display:flex;justify-content:space-between;gap:12px;font-size:.78rem;color:var(--ink-3);letter-spacing:.04em}
.d-row b{color:var(--ink);font-weight:400}
.badge-sample{
  font-size:.62rem;letter-spacing:.16em;color:var(--accent);border:1px solid rgba(166,81,47,.35);
  padding:1px 6px;border-radius:2px;vertical-align:middle;margin-left:6px;
}
.tags{display:flex;flex-wrap:wrap;gap:6px}
.tag{font-size:.7rem;letter-spacing:.06em;color:var(--ink-2);background:var(--paper-2);border-radius:2px;padding:3px 9px}

/* 供应商卡 */
.s-card{padding:26px;display:flex;flex-direction:column;gap:12px}
.s-cat{font-size:.68rem;letter-spacing:.18em;color:var(--accent)}
.s-name{font-family:var(--serif);font-size:1.1rem;letter-spacing:.05em}
.s-desc{font-size:.84rem;color:var(--ink-2);line-height:1.8;font-weight:300;flex:1}
.s-foot{display:flex;justify-content:space-between;align-items:center;gap:12px;padding-top:14px;border-top:1px solid var(--line-soft);font-size:.75rem;color:var(--ink-3)}

/* ---------- 筛选条 ---------- */
.filters{
  display:flex;flex-wrap:wrap;gap:8px;align-items:center;
  padding:18px 0 22px;border-bottom:1px solid var(--line);margin-bottom:34px;
}
.filters .lbl{font-size:.72rem;letter-spacing:.16em;color:var(--ink-3);margin-right:6px}
.chip{
  border:1px solid var(--line);background:none;border-radius:100px;padding:7px 16px;
  font-size:.78rem;letter-spacing:.06em;color:var(--ink-2);
  transition:all .25s var(--ease);
}
.chip:hover{border-color:var(--ink-3);color:var(--ink)}
.chip.is-on{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.count{font-size:.75rem;color:var(--ink-3);margin-left:auto;letter-spacing:.08em}

ul.list{margin:14px 0 18px}
ul.list li{
  position:relative;padding-left:20px;margin:9px 0;color:var(--ink-2);
  font-size:.95rem;line-height:1.9;font-weight:300;
}
ul.list li::before{
  content:"";position:absolute;left:2px;top:.85em;width:5px;height:1px;background:var(--accent);
}

/* ---------- 百科正文 ---------- */
.doc-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:clamp(32px,5vw,80px);align-items:start}
.doc-layout > *{min-width:0}
.toc{position:sticky;top:100px;max-height:calc(100vh - 130px);overflow:auto;padding-right:8px}
.toc h5{
  font-family:var(--sans);font-size:.7rem;letter-spacing:.2em;color:var(--ink-3);
  margin:0 0 16px;font-weight:400;text-transform:uppercase;
}
.toc ol{border-left:1px solid var(--line)}
.toc li a{
  display:block;padding:7px 0 7px 16px;margin-left:-1px;border-left:1px solid transparent;
  font-size:.84rem;color:var(--ink-3);line-height:1.5;transition:color .2s,border-color .2s;
}
.toc li a:hover{color:var(--ink)}
.toc li a.active{color:var(--accent);border-left-color:var(--accent)}
.toc li li a{padding-left:28px;font-size:.78rem}

.article{max-width:820px;min-width:0}
.article > .lede{
  font-size:1.05rem;color:var(--ink-2);line-height:2;font-weight:300;
  padding-bottom:32px;border-bottom:1px solid var(--line);margin-bottom:8px;
}
.article h2{
  font-size:clamp(1.45rem,2.4vw,1.95rem);letter-spacing:.03em;
  margin:clamp(48px,6vw,76px) 0 18px;scroll-margin-top:110px;display:flex;align-items:baseline;gap:14px;
}
.article h2 .n{font-size:.72rem;color:var(--accent);letter-spacing:.14em;font-family:var(--serif)}
.article h3{
  font-size:1.12rem;letter-spacing:.04em;margin:34px 0 12px;scroll-margin-top:110px;
  font-family:var(--serif);
}
.article p{color:var(--ink-2);line-height:2;margin:12px 0;font-weight:300}
.article strong{color:var(--ink);font-weight:500}
.article ul.list{margin:14px 0 18px}
.article ul.list li{
  position:relative;padding-left:20px;margin:9px 0;color:var(--ink-2);font-size:.95rem;line-height:1.9;font-weight:300;
}
.article ul.list li::before{
  content:"";position:absolute;left:2px;top:.85em;width:5px;height:1px;background:var(--accent);
}
.article ul.check li::before{
  content:"";position:absolute;left:0;top:.5em;width:11px;height:11px;border:1px solid var(--line);background:var(--paper);
}
.article ul.check li{padding-left:24px}

.note{
  border-left:2px solid var(--accent);background:linear-gradient(90deg,rgba(166,81,47,.05),transparent 70%);
  padding:18px 22px;margin:24px 0;font-size:.9rem;color:var(--ink-2);line-height:1.9;
}
.note b{color:var(--accent);font-weight:500;letter-spacing:.06em;margin-right:6px}

.table-wrap{overflow-x:auto;margin:22px 0;border:1px solid var(--line)}
table{width:100%;border-collapse:collapse;font-size:.85rem;min-width:520px}
th,td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line-soft);color:var(--ink-2)}
th{
  background:var(--paper-2);font-weight:400;font-size:.75rem;letter-spacing:.1em;color:var(--ink);
  border-bottom:1px solid var(--line);white-space:nowrap;
}
td strong{color:var(--ink)}
tr:last-child td{border-bottom:none}

/* ---------- 分类手风琴 ---------- */
.acc{border-top:1px solid var(--line)}
.acc-item{border-bottom:1px solid var(--line)}
.acc-btn{
  width:100%;display:flex;align-items:center;gap:18px;background:none;border:none;text-align:left;
  padding:22px 4px;transition:padding .3s var(--ease),color .25s;
}
.acc-btn:hover{padding-left:10px;color:var(--accent)}
.acc-no{font-family:var(--serif);font-size:.72rem;color:var(--accent);letter-spacing:.12em;width:26px;flex-shrink:0}
.acc-t{font-family:var(--serif);font-size:1.08rem;letter-spacing:.05em;flex:1}
.acc-sub{font-size:.75rem;color:var(--ink-3);letter-spacing:.06em}
.acc-ico{
  width:22px;height:22px;position:relative;flex-shrink:0;
}
.acc-ico::before,.acc-ico::after{
  content:"";position:absolute;background:currentColor;transition:transform .35s var(--ease),opacity .35s;
}
.acc-ico::before{left:0;right:0;top:50%;height:1px}
.acc-ico::after{top:0;bottom:0;left:50%;width:1px}
.acc-item.open .acc-ico::after{transform:scaleY(0)}
.acc-panel{overflow:hidden;max-height:0;transition:max-height .45s var(--ease)}
.acc-inner{padding:0 4px 30px 44px;max-width:720px}
.acc-inner p{font-size:.9rem;color:var(--ink-2);line-height:1.9;font-weight:300}
.acc-inner .kv{display:grid;grid-template-columns:84px 1fr;gap:10px 18px;margin-top:16px;font-size:.86rem}
.acc-inner .kv dt{color:var(--ink-3);letter-spacing:.06em;font-size:.78rem;padding-top:2px}
.acc-inner .kv dd{margin:0;color:var(--ink-2);line-height:1.8;font-weight:300}

/* ---------- 页面头部 ---------- */
.page-head{padding:clamp(48px,7vw,92px) 0 clamp(32px,4vw,52px);border-bottom:1px solid var(--line)}
.page-head h1{font-size:clamp(2.1rem,4.4vw,3.4rem);letter-spacing:.03em;margin:18px 0 0}
.page-head .lead{
  margin-top:22px;max-width:38em;color:var(--ink-2);font-size:1rem;line-height:2;font-weight:300;
}
.crumb{font-size:.74rem;color:var(--ink-3);letter-spacing:.12em}
.crumb a:hover{color:var(--accent)}

/* ---------- 编辑式双栏 ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,72px);align-items:center}
.fig{border:1px solid var(--line);background:var(--paper-2);padding:clamp(18px,3vw,34px)}
.fig svg{width:100%;height:auto}
.fig-cap{font-size:.72rem;color:var(--ink-3);letter-spacing:.1em;margin-top:16px}

/* ---------- 数据条 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.stat{padding:clamp(26px,3vw,40px) clamp(14px,2vw,28px);border-right:1px solid var(--line-soft)}
.stat:last-child{border-right:none}
.stat strong{display:block;font-family:var(--serif);font-size:clamp(1.6rem,2.6vw,2.2rem);font-weight:500;letter-spacing:.02em}
.stat span{font-size:.76rem;color:var(--ink-3);letter-spacing:.1em;display:block;margin-top:8px}

/* ---------- CTA ---------- */
.cta{
  background:var(--ink);color:var(--paper);padding:clamp(48px,7vw,88px) 0;position:relative;overflow:hidden;
}
.cta::after{
  content:"";position:absolute;right:-10%;top:-40%;width:60vw;height:60vw;max-width:700px;max-height:700px;
  border:1px solid rgba(244,245,240,.08);border-radius:50%;
}
.cta-in{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap;position:relative;z-index:2}
.cta h2{font-size:clamp(1.6rem,3vw,2.4rem);letter-spacing:.03em;color:var(--paper)}
.cta p{color:rgba(244,245,240,.6);margin-top:14px;font-size:.9rem;letter-spacing:.04em}
.cta .btn{background:var(--paper);color:var(--ink);border-color:var(--paper)}
.cta .btn:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.cta .btn-ghost{background:none;color:var(--paper);border-color:rgba(244,245,240,.34)}
.cta .btn-ghost:hover{background:rgba(244,245,240,.1);border-color:var(--paper);color:var(--paper)}
.cta-acts{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-foot{background:var(--paper-2);border-top:1px solid var(--line);padding:clamp(44px,6vw,72px) 0 28px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:clamp(24px,4vw,56px);padding-bottom:44px}
.foot-brand{font-family:var(--serif);font-size:1.35rem;letter-spacing:.16em}
.foot-desc{font-size:.82rem;color:var(--ink-3);line-height:1.9;margin-top:16px;max-width:24em}
.foot-col h5{font-family:var(--sans);font-size:.7rem;letter-spacing:.18em;color:var(--ink-3);margin:0 0 16px;font-weight:400}
.foot-col li{margin:9px 0}
.foot-col a{font-size:.84rem;color:var(--ink-2);transition:color .2s}
.foot-col a:hover{color:var(--accent)}
.foot-bot{
  border-top:1px solid var(--line);padding-top:22px;display:flex;justify-content:space-between;
  gap:18px;flex-wrap:wrap;font-size:.74rem;color:var(--ink-3);letter-spacing:.04em;
}
.dot{display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--accent);vertical-align:middle;margin:0 8px}

/* ---------- 搜索层 ---------- */
.search-layer{
  position:fixed;inset:0;z-index:100;background:rgba(26,26,24,.4);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  display:none;padding:12vh var(--gutter) 0;
}
.search-layer.on{display:block;animation:fade .25s var(--ease)}
@keyframes fade{from{opacity:0}to{opacity:1}}
.search-box{
  max-width:680px;margin:0 auto;background:var(--paper);border:1px solid var(--line);
  box-shadow:0 40px 80px -40px rgba(0,0,0,.45);
}
.search-field{display:flex;align-items:center;gap:14px;padding:18px 22px;border-bottom:1px solid var(--line)}
.search-field svg{width:18px;height:18px;stroke:var(--ink-3);fill:none;stroke-width:1.5;flex-shrink:0}
.search-field input{
  flex:1;border:none;background:none;outline:none;font-size:1rem;font-family:var(--sans);color:var(--ink);
}
.search-field input::placeholder{color:var(--ink-3)}
.search-field input::-webkit-search-cancel-button{-webkit-appearance:none;appearance:none;display:none}
.search-field kbd{
  font-family:var(--sans);font-size:.66rem;color:var(--ink-3);border:1px solid var(--line);
  padding:2px 6px;border-radius:3px;letter-spacing:.08em;
}
.search-res{max-height:52vh;overflow:auto;padding:8px}
.res-item{
  display:block;padding:13px 16px;border-radius:2px;transition:background .18s;
}
.res-item + .res-item{border-top:1px solid var(--line-soft)}
.res-item:hover,.res-item.sel{background:var(--paper-2)}
.res-cat{font-size:.66rem;letter-spacing:.16em;color:var(--accent);display:block;margin-bottom:4px}
.res-t{display:block;font-size:.95rem;color:var(--ink);letter-spacing:.02em}
.res-d{display:block;font-size:.78rem;color:var(--ink-3);margin-top:3px;line-height:1.6}
.search-tip{padding:14px 22px;font-size:.74rem;color:var(--ink-3);letter-spacing:.06em;border-top:1px solid var(--line-soft)}

/* ---------- 首页搜索带 ---------- */
.search-strip{
  background:var(--paper-2);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);
}
.strip-in{display:flex;align-items:center;gap:clamp(12px,2vw,26px);padding-top:clamp(24px,3vw,38px)}
.strip-label{
  font-size:.72rem;letter-spacing:.2em;color:var(--ink-3);white-space:nowrap;
  writing-mode:horizontal-tb;
}
.strip-field{
  flex:1;display:flex;align-items:center;gap:14px;min-width:0;
  height:62px;padding:0 10px 0 20px;background:var(--paper);border:1px solid var(--line);
  transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.strip-field:hover{border-color:var(--ink-3)}
.strip-field:focus-within{border-color:var(--ink);box-shadow:0 0 0 4px rgba(166,81,47,.09)}
.strip-field > svg{width:18px;height:18px;stroke:var(--ink-3);fill:none;stroke-width:1.6;flex-shrink:0}
.strip-field input{
  flex:1;min-width:0;border:none;background:none;outline:none;
  font-family:var(--sans);font-size:clamp(.92rem,1.1vw,1.02rem);color:var(--ink);letter-spacing:.02em;cursor:text;
}
.strip-field input::placeholder{color:var(--ink-3)}
.strip-field .go{
  flex-shrink:0;height:44px;padding:0 22px;background:var(--ink);color:var(--paper);border:none;
  font-size:.86rem;letter-spacing:.1em;transition:background .25s;
}
.strip-field .go:hover{background:var(--accent)}
.strip-tags{
  display:flex;align-items:center;gap:10px 18px;flex-wrap:wrap;
  padding:14px 0 clamp(22px,3vw,30px);font-size:.78rem;color:var(--ink-3);letter-spacing:.06em;
}
.strip-tags button{
  border:none;background:none;padding:0 0 2px;font-size:.78rem;color:var(--ink-2);
  border-bottom:1px solid var(--line);transition:color .2s,border-color .2s;
}
.strip-tags button:hover{color:var(--accent);border-color:var(--accent)}

/* ---------- 留言 ---------- */
.fb-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(32px,5vw,72px);align-items:start}
.fb-side h2{font-size:clamp(1.5rem,2.6vw,2rem);letter-spacing:.03em}
.fb-side p{color:var(--ink-2);line-height:2;font-weight:300;font-size:.94rem;margin-top:18px}
.fb-side .list li{font-size:.9rem}
.fb-form-box{
  border:1px solid var(--line);background:var(--paper);padding:clamp(22px,3vw,40px);
  position:relative;
}
.fb-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{margin-bottom:20px}
.field label{
  display:block;font-size:.76rem;letter-spacing:.1em;color:var(--ink-3);margin-bottom:9px;
}
.field label i{font-style:normal;color:var(--accent);margin-left:4px}
.field input,.field textarea,.field select{
  width:100%;border:1px solid var(--line);background:var(--paper);border-radius:2px;
  padding:12px 14px;font-family:var(--sans);font-size:.92rem;color:var(--ink);line-height:1.7;
  transition:border-color .22s,box-shadow .22s;
}
.field input:focus,.field textarea:focus,.field select:focus{
  outline:none;border-color:var(--ink);box-shadow:0 0 0 3px rgba(166,81,47,.08);
}
.field textarea{min-height:158px;resize:vertical}
.field select{height:46px;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%238C8980' stroke-width='1.4'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center}
.field .hint{font-size:.72rem;color:var(--ink-3);margin-top:7px;letter-spacing:.04em}
.field .err-msg{display:none;font-size:.74rem;color:#B3261E;margin-top:7px}
.field.err input,.field.err textarea{border-color:#B3261E;background:#FDF7F6}
.field.err .err-msg{display:block}
.fb-submit{
  width:100%;justify-content:center;margin-top:6px;border:none;
}
.fb-note{font-size:.72rem;color:var(--ink-3);margin-top:14px;line-height:1.8;letter-spacing:.03em}

.fb-success{
  position:absolute;inset:0;background:var(--paper);display:none;
  flex-direction:column;align-items:center;justify-content:center;text-align:center;
  padding:clamp(24px,4vw,48px);
}
.fb-success.on{display:flex;animation:fade .35s var(--ease)}
.ok-mark{width:74px;height:74px;margin-bottom:24px}
.ok-mark circle{
  fill:none;stroke:var(--accent);stroke-width:2.2;
  stroke-dasharray:220;stroke-dashoffset:220;animation:draw .7s var(--ease) forwards;
}
.ok-mark path{
  fill:none;stroke:var(--accent);stroke-width:3;stroke-linecap:round;stroke-linejoin:round;
  stroke-dasharray:44;stroke-dashoffset:44;animation:draw .45s .45s var(--ease) forwards;
}
@keyframes draw{to{stroke-dashoffset:0}}
.fb-success h3{font-size:1.4rem;letter-spacing:.05em}
.fb-success p{color:var(--ink-2);font-size:.9rem;line-height:1.95;margin-top:14px;font-weight:300}
.fb-success .no{
  display:inline-block;margin-top:18px;padding:6px 14px;border:1px dashed var(--line);
  font-size:.78rem;letter-spacing:.12em;color:var(--ink-2);
}
.fb-success .again{
  margin-top:26px;background:none;border:1px solid var(--line);padding:10px 22px;
  font-size:.82rem;letter-spacing:.08em;color:var(--ink-2);transition:all .25s;
}
.fb-success .again:hover{border-color:var(--ink);color:var(--ink)}

.toast{
  position:fixed;left:50%;bottom:36px;z-index:120;transform:translate(-50%,18px);
  background:var(--ink);color:var(--paper);padding:13px 22px;border-radius:2px;
  font-size:.86rem;letter-spacing:.06em;opacity:0;pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease);
  box-shadow:0 18px 40px -20px rgba(0,0,0,.5);
}
.toast.on{opacity:1;transform:translate(-50%,0)}

/* ---------- 移动端 ---------- */
@media(max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-art{order:2;max-width:460px;margin:0 auto;width:100%}
  .entries{grid-template-columns:repeat(2,1fr)}
  .entry:nth-child(3n){border-right:1px solid var(--line)}
  .entry:nth-child(2n){border-right:none}
  .flow{grid-template-columns:repeat(3,1fr)}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .doc-layout{grid-template-columns:1fr}
  .head-search{display:none}
  .search-ico{display:grid}
  .fb-layout{grid-template-columns:1fr;gap:36px}
  .toc{position:static;max-height:none;padding:0 0 18px;margin-bottom:26px;border-bottom:1px solid var(--line)}
  .toc h5{margin-bottom:12px}
  .toc ol{display:flex;gap:8px;overflow-x:auto;border-left:none;padding-bottom:6px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .toc ol::-webkit-scrollbar{display:none}
  .toc li{flex:0 0 auto}
  .toc li a{
    display:block;white-space:nowrap;padding:6px 14px;font-size:.78rem;color:var(--ink-2);
    border:1px solid var(--line);border-radius:100px;
  }
  .toc li a:hover{color:var(--ink);border-color:var(--ink-3)}
  .toc li a.active{background:var(--ink);border-color:var(--ink);color:var(--paper)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2n){border-right:none}
  .stat:nth-child(-n+2){border-bottom:1px solid var(--line-soft)}
}
@media(max-width:720px){
  .nav{
    position:fixed;left:0;right:0;top:76px;background:var(--paper);border-bottom:1px solid var(--line);
    flex-direction:column;align-items:flex-start;gap:0;padding:8px var(--gutter) 22px;
    display:none;
  }
  .nav.on{display:flex}
  .nav a{width:100%;padding:14px 0;border-bottom:1px solid var(--line-soft);font-size:1rem}
  .nav a::after{display:none}
  .nav a[aria-current="page"]{color:var(--accent)}
  .nav-toggle{display:grid}
  .head-in{gap:12px}
  .brand-sub{display:none}
  .entries{grid-template-columns:1fr}
  .entry{border-right:none!important}
  .flow{grid-template-columns:repeat(2,1fr)}
  .grid-3,.grid-4,.grid-2,.split{grid-template-columns:1fr}
  .sec-head{flex-direction:column;align-items:flex-start;gap:14px}
  .foot-grid{grid-template-columns:1fr}
  .cta-in{flex-direction:column;align-items:flex-start}
  .article h2{margin-top:44px}
  .search-layer{padding-top:8vh}
  .hero-meta{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:40px}
  .hero-meta div{font-size:.68rem;letter-spacing:.02em}
  .hero-meta strong{font-size:1.35rem}
  .strip-label{display:none}
  .strip-in{padding-top:20px}
  .strip-field{height:54px;padding-left:16px}
  .strip-field .go{height:38px;padding:0 16px;font-size:.8rem}
  .fb-row{grid-template-columns:1fr;gap:0}
  .fb-form-box{padding:20px}
}
@media(prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}

/* 打印 */
@media print{
  .site-head,.site-foot,.toc,.search-layer,.cta{display:none}
  body{background:#fff}
}

/* ============================================================
   左侧本页导航（≥1200px 显示，浅纸面板）
   ============================================================ */
.pnav{
  position:fixed;left:0;top:77px;bottom:0;width:232px;z-index:55;
  display:none;flex-direction:column;
  padding:26px 0 24px 26px;
  background:var(--paper);
  border-right:1px solid var(--line);
}
.pnav::after{
  content:"";position:absolute;top:0;right:-1px;bottom:0;width:1px;
  background:linear-gradient(180deg,rgba(60,86,67,.22),rgba(60,86,67,0) 30%,rgba(60,86,67,0) 70%,rgba(60,86,67,.22));
}
.pnav-cap{
  font-size:.62rem;letter-spacing:.34em;color:var(--ink-3);
  display:flex;align-items:center;gap:10px;margin-bottom:14px;
}
.pnav-cap::after{content:"";flex:1;height:1px;background:var(--line-soft)}
.pnav-nav{display:flex;flex-direction:column;gap:1px;overflow-y:auto;min-height:0;padding-right:14px}
.pnav-nav a{
  position:relative;display:flex;align-items:baseline;gap:10px;
  padding:8px 10px;border-radius:2px;
  font-size:.82rem;letter-spacing:.03em;line-height:1.55;color:var(--ink-2);
  transition:background .18s var(--ease),color .18s var(--ease);
}
.pnav-nav a i{
  font-style:normal;font-family:var(--serif);font-size:.64rem;letter-spacing:.12em;
  color:var(--ink-3);flex-shrink:0;min-width:1.6em;transition:color .18s;
}
.pnav-nav a:hover{background:var(--paper-2);color:var(--ink)}
.pnav-nav a.active{background:rgba(60,86,67,.09);color:var(--ink);font-weight:500}
.pnav-nav a.active i{color:var(--accent)}
.pnav-nav a.active::before{
  content:"";position:absolute;left:0;top:7px;bottom:7px;width:2px;background:var(--accent);
}
.pnav-tip{
  margin-top:auto;padding:14px 10px 0 0;border-top:1px solid var(--line-soft);
  font-size:.66rem;line-height:1.9;letter-spacing:.14em;color:var(--ink-3);
}

@media (min-width:1200px){
  .pnav{display:flex}
  main,.site-foot{padding-left:232px}
  /* 百科页自带的行内目录与本页导航重复，桌面端隐藏 */
  .doc-layout{grid-template-columns:minmax(0,1fr)}
  .doc-layout .toc{display:none}
}

/* 锚点跳转时避开吸顶栏 */
main [id]{scroll-margin-top:96px}
@media (min-width:1200px){main [id]{scroll-margin-top:92px}}

/* ---------- 交互报价卡工具（quote.html） ---------- */
.qtool{max-width:880px;margin:0 auto}
.qsec{border:1px solid var(--line);background:var(--paper);padding:clamp(20px,3vw,32px);margin-bottom:22px}
.qsec h3{font-size:1.02rem;letter-spacing:.05em;margin-bottom:6px}
.qsec .qhint{font-size:.78rem;color:var(--ink-3);letter-spacing:.04em;margin-bottom:18px}
.qrow{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.qrow label{font-size:.82rem;color:var(--ink-2);letter-spacing:.06em;white-space:nowrap}
.qarea{
  font-family:var(--serif);font-size:1.5rem;width:110px;text-align:center;
  border:none;border-bottom:2px solid var(--line);background:none;padding:4px 2px;
  color:var(--ink);transition:border-color .25s var(--ease);
}
.qarea:focus{outline:none;border-color:var(--accent)}
.qrange{flex:1;min-width:180px;accent-color:var(--accent)}
.qunit{font-size:.78rem;color:var(--ink-3)}
.qitems{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.qitem{border:1px solid var(--line);padding:14px 16px;transition:background .3s var(--ease)}
.qitem:hover{background:var(--paper-2)}
.qitem-head{display:flex;align-items:baseline;gap:10px}
.qitem-head b{font-size:.92rem;letter-spacing:.06em}
.qitem-val{margin-left:auto;font-size:.8rem;color:var(--accent);font-family:var(--serif);white-space:nowrap}
.qitem .qnote{font-size:.72rem;color:var(--ink-3);line-height:1.7;margin-top:6px}
.qopts{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.qopts .chip{padding:4px 13px;font-size:.72rem}
.qextras{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.qextra{display:flex;align-items:flex-start;gap:10px;border:1px solid var(--line);padding:13px 15px;cursor:pointer;transition:background .3s var(--ease)}
.qextra:hover{background:var(--paper-2)}
.qextra input{margin-top:3px;accent-color:var(--accent)}
.qextra b{font-size:.86rem;letter-spacing:.04em;display:block}
.qextra span{font-size:.74rem;color:var(--ink-3);line-height:1.65;display:block;margin-top:2px}
.qextra em{font-style:normal;font-size:.74rem;color:var(--accent);font-family:var(--serif);white-space:nowrap;margin-left:auto}
.qsum{text-align:center;padding:clamp(24px,4vw,40px) 20px}
.qsum-label{font-size:.78rem;letter-spacing:.22em;color:var(--ink-3)}
.qsum-val{font-family:var(--serif);font-size:clamp(1.9rem,4vw,2.7rem);letter-spacing:.03em;margin:10px 0 4px;color:var(--ink)}
.qsum-val small{font-size:.55em;color:var(--ink-3)}
.qsum-sub{font-size:.76rem;color:var(--ink-3);letter-spacing:.05em}
.qsum-actions{display:flex;justify-content:center;gap:14px;margin-top:26px;flex-wrap:wrap}
.qbreak{margin-top:22px}
.qbreak td:nth-child(2),.qbreak td:nth-child(3){text-align:right;font-family:var(--serif);white-space:nowrap}
.qbreak tfoot td{color:var(--ink-2)}
@media (max-width:720px){
  .qitems,.qextras{grid-template-columns:1fr}
}
@media print{
  .site-head,.pnav,.site-foot,.cta,.qsum-actions,.crumb{display:none !important}
  main,.site-foot{padding-left:0 !important}
  body{background:#fff}
  .qsec{border-color:#ccc;break-inside:avoid}
}

/* ============================================================
   移动端本页章节目录（<1200px）
   复用 JS 生成的 .pnav，改造成「目录」悬浮按钮 + 左侧滑出抽屉。
   桌面（≥1200px）仍走原固定侧栏，本段在该宽度下不生效。
   ============================================================ */
.pnav-fab,.pnav-mask{display:none}

@media (max-width:1199px){
  /* 百科页自带行内目录在窄屏与抽屉重复，统一交给抽屉 */
  .doc-layout .toc{display:none}

  /* 右下角悬浮「目录」按钮 */
  .pnav-fab{
    display:flex;align-items:center;gap:8px;
    position:fixed;right:16px;bottom:20px;z-index:90;
    padding:11px 17px;border:1px solid rgba(244,245,240,.2);border-radius:999px;
    background:var(--accent);color:var(--paper);
    font-family:var(--sans);font-size:.82rem;letter-spacing:.1em;
    box-shadow:0 8px 26px rgba(20,24,19,.24);
    cursor:pointer;-webkit-tap-highlight-color:transparent;
    transition:transform .2s var(--ease),box-shadow .2s var(--ease);
  }
  .pnav-fab svg{width:16px;height:16px;flex-shrink:0}
  .pnav-fab .fab-txt{white-space:nowrap}
  .pnav-fab:active{transform:scale(.96)}

  /* 抽屉遮罩 */
  .pnav-mask{
    display:block;position:fixed;inset:0;z-index:99;
    background:rgba(20,24,19,.44);
    opacity:0;visibility:hidden;
    transition:opacity .28s var(--ease),visibility .28s var(--ease);
  }
  .pnav-mask.on{opacity:1;visibility:visible}

  /* 抽屉本体：默认移出屏幕左侧，.open 时滑入 */
  .pnav{
    display:flex;transform:translateX(-102%);
    transition:transform .3s var(--ease);
    z-index:100;width:min(84vw,310px);
    box-shadow:14px 0 44px rgba(20,24,19,.18);
  }
  .pnav.open{transform:translateX(0)}

  /* 抽屉标题行 + 关闭按钮 */
  .pnav-cap.pnav-top{padding-right:16px}
  .pnav-close{
    appearance:none;border:0;background:none;color:var(--ink-3);
    font-size:1.6rem;line-height:.9;padding:0 2px;cursor:pointer;
    -webkit-tap-highlight-color:transparent;
  }

  /* 触摸目标加大，方便手指点选 */
  .pnav-nav a{padding:12px 10px;font-size:.9rem}
  .pnav-tip{display:none}
}

@media print{
  .pnav-fab,.pnav-mask{display:none !important}
  .pnav{transform:none !important}
}