/* ==========================================================================
   长乐坊CN · 共享站点套件 /assets/site.css
   坊市档案 · 朱砂 / 铜金 / 墨黑 / 宣纸米白
   ========================================================================== */

:root{
  --ink:#171412;
  --ink-soft:#2B2724;
  --paper:#F6F0E4;
  --paper-warm:#FFFDF8;
  --cinnabar:#C53A2E;
  --cinnabar-deep:#8E241C;
  --bronze:#B8893B;
  --bronze-bright:#E0B25C;
  --bronze-pale:#D9C9B0;
  --celadon:#3F7F6B;
  --celadon-deep:#245348;
  --taupe:#7A6E62;

  --font-display:"Songti SC","Source Han Serif SC","Noto Serif SC","SimSun",serif;
  --font-body:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --max:1280px;
  --gutter:clamp(18px,4vw,56px);
  --line:2px solid var(--ink);
  --shadow-hard:8px 8px 0 var(--ink);
  --shadow-soft:6px 6px 0 rgba(23,20,18,.14);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ---------- reset ---------- */
*,
*::before,
*::after{ box-sizing:border-box; }

html{ -webkit-text-size-adjust:100%; }

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:800;
  line-height:1.18;
  letter-spacing:-.01em;
  margin:0 0 .55em;
  text-wrap:balance;
}

h1{ font-size:clamp(2.4rem,6vw,3.6rem); }
h2{ font-size:clamp(1.7rem,3.4vw,2.7rem); }
h3{ font-size:clamp(1.2rem,2.2vw,1.55rem); }
h4{ font-size:1.05rem; }

p{ margin:0 0 1em; }

a{ color:var(--cinnabar-deep); text-decoration-thickness:2px; text-underline-offset:3px; }
a:hover{ color:var(--cinnabar); }

img,svg{ max-width:100%; }

ul,ol{ margin:0; padding:0; }

:focus-visible{
  outline:3px solid var(--celadon);
  outline-offset:3px;
}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  left:14px;
  top:-80px;
  z-index:200;
  display:inline-block;
  padding:12px 20px;
  background:var(--ink);
  color:var(--paper);
  font-weight:700;
  text-decoration:none;
  border:2px solid var(--bronze-bright);
  box-shadow:4px 4px 0 var(--cinnabar);
  transition:top .18s var(--ease);
}
.skip-link:focus{
  top:14px;
  color:var(--paper);
}

/* ---------- 阅读进度 ---------- */
.scroll-progress{
  position:fixed;
  left:0;
  right:0;
  top:0;
  height:6px;
  z-index:120;
  background:transparent;
  pointer-events:none;
}
.scroll-progress__bar{
  display:block;
  height:100%;
  width:100%;
  transform:scaleX(0);
  transform-origin:0 50%;
  background:linear-gradient(90deg,var(--bronze-bright),var(--cinnabar));
  will-change:transform;
}

/* ---------- 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:var(--paper);
  border-bottom:2px solid var(--ink);
  padding-top:6px;
}
.site-header::before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:6px;
  background:repeating-linear-gradient(
    90deg,
    var(--cinnabar) 0 14px,
    var(--cinnabar-deep) 14px 20px,
    var(--bronze) 20px 22px,
    var(--ink) 22px 46px
  );
}

.header-inner{
  width:100%;
  max-width:var(--max);
  margin:0 auto;
  padding:14px var(--gutter);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(16px,2.4vw,32px);
}

.header-brand{
  display:flex;
  align-items:center;
  gap:clamp(14px,2vw,26px);
  min-width:0;
}

.brand-seal{
  display:inline-flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  color:var(--ink);
}
.brand-seal:hover{ color:var(--ink); }
.brand-seal__mark{
  display:grid;
  place-items:center;
  width:46px;
  height:46px;
  flex:0 0 auto;
  background:var(--cinnabar);
  color:var(--paper-warm);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  font-family:var(--font-display);
  font-size:1.55rem;
  font-weight:800;
  line-height:1;
  transform:rotate(-2deg);
}
.brand-seal__text{ display:block; min-width:0; }
.brand-seal__name{
  display:block;
  font-family:var(--font-display);
  font-size:1.3rem;
  font-weight:800;
  letter-spacing:.02em;
  line-height:1.2;
}
.brand-seal__sub{
  display:block;
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.14em;
  color:var(--taupe);
  line-height:1.6;
}

.brand-links{
  display:flex;
  align-items:center;
  gap:2px;
  padding-left:16px;
  border-left:2px solid var(--bronze-pale);
}
.brand-links__item{
  padding:6px 10px;
  font-size:.86rem;
  font-weight:600;
  color:var(--ink);
  text-decoration:none;
  border-bottom:2px solid transparent;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.brand-links__item:hover{
  color:var(--cinnabar-deep);
  border-bottom-color:var(--bronze);
}

/* ---------- 主导航（桌面：档案签） ---------- */
.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(12px,2vw,26px);
}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:2px;
  list-style:none;
}
.site-nav__link{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:8px 11px;
  font-size:.94rem;
  font-weight:600;
  color:var(--ink);
  text-decoration:none;
  border-bottom:3px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease),background-color .18s var(--ease);
}
.site-nav__link:hover{
  color:var(--cinnabar-deep);
  border-bottom-color:var(--bronze);
  background:rgba(184,137,59,.10);
}
.site-nav__link[aria-current="page"]{
  color:var(--cinnabar-deep);
  border-bottom-color:var(--cinnabar);
  background:linear-gradient(to top,rgba(197,58,46,.14),transparent 78%);
}

.site-nav__actions{
  display:flex;
  align-items:center;
  gap:10px;
  padding-left:clamp(10px,1.6vw,20px);
  border-left:2px solid var(--bronze-pale);
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5em;
  min-height:48px;
  padding:0 20px;
  font-family:var(--font-body);
  font-size:.94rem;
  font-weight:700;
  letter-spacing:.02em;
  text-decoration:none;
  color:var(--ink);
  background:var(--paper-warm);
  border:2px solid var(--ink);
  border-radius:0;
  box-shadow:4px 4px 0 var(--ink);
  cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease);
}
.btn:hover{
  transform:translate(-2px,-2px);
  box-shadow:6px 6px 0 var(--ink);
  color:var(--ink);
}
.btn:active{
  transform:translate(2px,2px);
  box-shadow:1px 1px 0 var(--ink);
}
.btn--primary{
  background:var(--cinnabar);
  color:var(--paper-warm);
}
.btn--primary:hover{
  background:var(--cinnabar-deep);
  color:var(--paper-warm);
}
.btn--ghost{
  background:transparent;
}
.btn--ghost:hover{
  background:var(--ink);
  color:var(--paper);
}
.btn--block{ width:100%; }

/* ---------- 移动导航按钮 ---------- */
.nav-toggle{
  display:none;
  align-items:center;
  gap:10px;
  min-height:48px;
  padding:0 14px;
  background:var(--ink);
  color:var(--paper);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--cinnabar);
  font-family:var(--font-body);
  font-size:.9rem;
  font-weight:700;
  letter-spacing:.08em;
  cursor:pointer;
  transition:background-color .18s var(--ease);
}
.nav-toggle__bars{
  display:inline-flex;
  flex-direction:column;
  gap:4px;
  width:20px;
}
.nav-toggle__bars span{
  display:block;
  height:2px;
  background:currentColor;
  transition:transform .2s var(--ease),opacity .2s var(--ease);
}
.nav-toggle__label{ line-height:1; }
.nav-toggle[aria-expanded="true"]{ background:var(--cinnabar); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1){ transform:translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3){ transform:translateY(-6px) rotate(-45deg); }

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:clamp(56px,8vw,104px);
  background:var(--ink);
  color:var(--paper);
  border-top:6px solid var(--cinnabar);
  padding:clamp(44px,6vw,80px) var(--gutter) 0;
}
.footer-inner{
  width:100%;
  max-width:var(--max);
  margin:0 auto;
}
.footer-top{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.6fr;
  gap:clamp(24px,3vw,44px);
  padding-bottom:clamp(28px,4vw,44px);
  border-bottom:1px solid rgba(184,137,59,.45);
}

.footer-brand__seal{
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  margin-bottom:14px;
  background:var(--cinnabar);
  color:var(--paper-warm);
  border:2px solid var(--bronze-bright);
  font-family:var(--font-display);
  font-size:1.5rem;
  font-weight:800;
  line-height:1;
  transform:rotate(-2deg);
}
.footer-brand__line{
  font-family:var(--font-display);
  font-size:1.16rem;
  font-weight:800;
  margin:0 0 .4em;
  color:var(--paper-warm);
}
.footer-brand__desc{
  margin:0;
  max-width:26em;
  font-size:.88rem;
  line-height:1.7;
  color:var(--bronze-pale);
}

.footer-nav__title{
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--bronze-bright);
  margin:0 0 14px;
}
.footer-nav__list{ list-style:none; }
.footer-nav__list li + li{ margin-top:2px; }
.footer-nav__list a{
  display:inline-block;
  padding:5px 0;
  font-size:.92rem;
  color:var(--paper);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-nav__list a:hover{
  color:var(--bronze-bright);
  border-bottom-color:var(--bronze);
}

.footer-contact__list{ list-style:none; }
.contact-row{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:6px 10px;
  padding:5px 0;
  border-bottom:1px dashed rgba(217,201,176,.28);
}
.contact-row--wide{ align-items:flex-start; }
.contact-row__label{
  flex:0 0 42px;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.14em;
  color:var(--bronze-bright);
}
.contact-row__value{
  flex:1 1 140px;
  min-width:0;
  font-family:var(--font-mono);
  font-size:.82rem;
  line-height:1.6;
  color:var(--paper);
  word-break:break-word;
}
.copy-btn{
  flex:0 0 auto;
  min-height:28px;
  padding:0 9px;
  font-family:var(--font-body);
  font-size:.7rem;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--bronze-pale);
  background:transparent;
  border:1px solid rgba(184,137,59,.7);
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.copy-btn:hover{
  background:var(--bronze);
  border-color:var(--bronze-bright);
  color:var(--ink);
}
.copy-btn[data-copied]{
  background:var(--celadon);
  border-color:var(--celadon-deep);
  color:var(--paper-warm);
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px 24px;
  padding:20px 0 26px;
  border-top:1px solid rgba(184,137,59,.45);
}
.footer-legal{
  margin:0;
  font-family:var(--font-mono);
  font-size:.76rem;
  letter-spacing:.06em;
  color:var(--bronze-pale);
}
.footer-legal__icp{ color:var(--paper); }
.footer-note{
  margin:0;
  font-size:.8rem;
  color:var(--taupe);
}

/* ---------- 版式工具 ---------- */
.container{
  width:100%;
  max-width:var(--max);
  margin:0 auto;
  padding-left:var(--gutter);
  padding-right:var(--gutter);
}

.section{
  padding:clamp(44px,6.5vw,88px) var(--gutter);
}
.section__inner{
  width:100%;
  max-width:var(--max);
  margin:0 auto;
}
.section--ink{
  background:var(--ink);
  color:var(--paper);
}
.section--ink h1,
.section--ink h2,
.section--ink h3{ color:var(--paper-warm); }
.section--ink .eyebrow{ color:var(--bronze-bright); }
.section--warm{ background:var(--paper-warm); }

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.7em;
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:700;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--cinnabar-deep);
}
.eyebrow::before{
  content:"";
  width:28px;
  height:2px;
  background:var(--bronze);
}

.display{
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(2.6rem,8vw,6.2rem);
  line-height:1.04;
  letter-spacing:-.02em;
  margin:0 0 .35em;
}

.divider{
  height:2px;
  border:0;
  margin:clamp(28px,4vw,52px) 0;
  background:repeating-linear-gradient(90deg,var(--ink) 0 16px,transparent 16px 26px);
}

/* ---------- 网格 ---------- */
.grid{
  display:grid;
  gap:clamp(18px,3vw,32px);
}
.grid--2{ grid-template-columns:repeat(2,minmax(0,1fr)); }
.grid--3{ grid-template-columns:repeat(3,minmax(0,1fr)); }
.grid--split{ grid-template-columns:minmax(0,1.7fr) minmax(0,1fr); }

/* ---------- 卡片 / 标签 ---------- */
.card{
  background:var(--paper-warm);
  border:var(--line);
  box-shadow:var(--shadow-hard);
  padding:clamp(18px,2.4vw,30px);
}
.card--offset{ transform:translateY(24px); }

.tag{
  display:inline-flex;
  align-items:center;
  gap:.45em;
  padding:3px 9px;
  font-family:var(--font-mono);
  font-size:.68rem;
  font-weight:700;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--ink);
  background:var(--paper);
  border:1.5px solid var(--ink);
}
.tag--new{
  background:var(--celadon);
  border-color:var(--celadon-deep);
  color:var(--paper-warm);
}
.tag--bronze{
  background:var(--bronze-bright);
  border-color:var(--bronze);
}

.status-dot{
  display:inline-block;
  width:9px;
  height:9px;
  border-radius:50%;
  background:var(--celadon);
  box-shadow:0 0 0 3px rgba(63,127,107,.22);
}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  margin:0 0 clamp(20px,3vw,34px);
  font-family:var(--font-mono);
  font-size:.76rem;
  letter-spacing:.06em;
}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  gap:.5em;
  list-style:none;
}
.breadcrumb li + li::before{
  content:"/";
  margin-right:.5em;
  color:var(--bronze);
}
.breadcrumb a{
  color:var(--taupe);
  text-decoration:none;
}
.breadcrumb a:hover{ color:var(--cinnabar-deep); }
.breadcrumb [aria-current="page"]{ color:var(--ink); font-weight:700; }

/* ---------- 正文容器 ---------- */
.prose{
  max-width:72ch;
  font-size:1.04rem;
  line-height:1.78;
}
.prose p{ margin:0 0 1.1em; }
.prose h2,
.prose h3{ margin-top:1.8em; }
.prose ul,
.prose ol{ margin:0 0 1.2em; padding-left:1.3em; }
.prose li{ margin-bottom:.4em; }
.prose blockquote{
  margin:1.6em 0;
  padding:16px 22px;
  background:var(--paper-warm);
  border-left:6px solid var(--cinnabar);
  box-shadow:var(--shadow-soft);
}
.prose code{
  font-family:var(--font-mono);
  font-size:.9em;
  background:rgba(184,137,59,.16);
  padding:1px 6px;
}

/* ---------- 图片容器基础规则 ---------- */
.media-frame{
  position:relative;
  display:block;
  overflow:hidden;
  background:var(--bronze-pale);
  border:var(--line);
  box-shadow:var(--shadow-hard);
}
.media-frame > img,
.media-frame > svg{
  display:block;
  width:100%;
  height:100%;
  object-fit:cover;
}
.media-frame--wide{ aspect-ratio:16 / 9; }
.media-frame--portrait{ aspect-ratio:4 / 5; }
.media-frame--slant{
  border:0;
  box-shadow:none;
  clip-path:polygon(0 0,100% 6%,100% 100%,0 94%);
}
.media-frame__label{
  position:absolute;
  left:0;
  bottom:0;
  padding:5px 12px;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.14em;
  text-transform:uppercase;
}

/* ---------- 滚动显现 ---------- */
html.has-js [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .38s ease-out,transform .38s ease-out;
}
html.has-js [data-reveal].is-visible{
  opacity:1;
  transform:none;
}

/* ---------- 响应式：平板 ---------- */
@media (max-width:1120px){
  .brand-links{ display:none; }
  .site-nav__link{ padding:8px 8px; font-size:.9rem; }
  .site-nav__actions .btn{ padding:0 14px; font-size:.88rem; }
}

/* ---------- 响应式：移动抽屉 ---------- */
@media (max-width:900px){
  .nav-toggle{ display:inline-flex; }

  body.is-nav-open{ overflow:hidden; }

  .site-nav{
    position:fixed;
    inset:0 0 0 auto;
    width:min(88vw,380px);
    height:100%;
    max-height:100dvh;
    overflow-y:auto;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:18px;
    padding:84px 22px 32px;
    background:var(--paper);
    border-left:4px solid var(--ink);
    box-shadow:-12px 0 0 rgba(23,20,18,.16);
    transform:translateX(102%);
    visibility:hidden;
    transition:transform .3s var(--ease),visibility .3s var(--ease);
    z-index:110;
  }
  .site-nav[data-open]{
    transform:translateX(0);
    visibility:visible;
  }
  .site-nav__list{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .site-nav__list li + li{ border-top:1px solid var(--bronze-pale); }
  .site-nav__link{
    width:100%;
    min-height:52px;
    padding:12px 4px;
    font-size:1.06rem;
    border-bottom:0;
    border-left:4px solid transparent;
  }
  .site-nav__link:hover{ background:rgba(184,137,59,.12); }
  .site-nav__link[aria-current="page"]{
    border-left-color:var(--cinnabar);
    background:linear-gradient(to right,rgba(197,58,46,.16),transparent 82%);
  }
  .site-nav__actions{
    flex-direction:column;
    align-items:stretch;
    gap:12px;
    margin-top:auto;
    padding:18px 0 0;
    border-left:0;
    border-top:2px solid var(--bronze-pale);
  }
  .site-nav__actions .btn{ width:100%; }

  .footer-top{ grid-template-columns:repeat(2,minmax(0,1fr)); }
  .grid--3{ grid-template-columns:repeat(2,minmax(0,1fr)); }
  .grid--split{ grid-template-columns:minmax(0,1fr); }
  .card--offset{ transform:none; }
}

/* ---------- 响应式：手机 ---------- */
@media (max-width:620px){
  .header-inner{ padding:12px var(--gutter); }
  .brand-seal__mark{ width:40px; height:40px; font-size:1.32rem; }
  .brand-seal__name{ font-size:1.12rem; }
  .brand-seal__sub{ font-size:.6rem; letter-spacing:.1em; }

  .footer-top{ grid-template-columns:minmax(0,1fr); gap:28px; }
  .footer-bottom{ flex-direction:column; align-items:flex-start; }
  .grid--2,
  .grid--3{ grid-template-columns:minmax(0,1fr); }

  .display{ font-size:clamp(2.1rem,11vw,3.2rem); }
  .prose{ font-size:1rem; }
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion:no-preference){
  html{ scroll-behavior:smooth; }
}

@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-nav{ transition:none; }
}

h2[id],h3[id]{ scroll-margin-top:104px; }