/* ===== 1. 变量与重置 ===== */
:root{
  --ink:#1B2A33;
  --ink-2:#33505C;
  --mist:#5D7C88;
  --line-blue:#A9BEC6;
  --fog:#E3EBEE;
  --paper:#FBF7F0;
  --card:#F3EDE3;
  --pepper:#D4471E;
  --pepper-deep:#B93A16;
  --pepper-soft:#F6D9CE;
  --moss:#2F5D4A;
  --rule:#C9D6DB;
  --shadow-card:0 1px 0 rgba(27,42,51,.04), 0 8px 24px rgba(27,42,51,.06);
  --shadow-float:0 1px 0 rgba(27,42,51,.04), 0 10px 28px rgba(27,42,51,.08);
  --shadow-lift:0 14px 34px rgba(27,42,51,.12);
  --r-card:6px;
  --r-pill:999px;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --wrap:1160px;
  --gutter:clamp(16px,3vw,28px);
}

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

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

body{
  margin:0;
  background-color:var(--paper);
  background-image:
    radial-gradient(circle at 14% -4%, rgba(93,124,136,.10), transparent 44%),
    radial-gradient(circle at 102% 6%, rgba(212,71,30,.05), transparent 40%);
  background-repeat:no-repeat;
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

h1,h2,h3,h4{
  margin:0 0 .6em;
  line-height:1.32;
  font-weight:700;
  color:var(--ink);
  letter-spacing:-.005em;
}
h1{font-size:clamp(32px,4.2vw,56px);}
h2{font-size:clamp(24px,2.6vw,28px);}
h3{font-size:20px;}

p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;}
img{max-width:100%;height:auto;display:block;}
a{color:var(--ink-2);text-decoration-color:var(--line-blue);text-underline-offset:3px;}
a:hover{color:var(--pepper);}
button{font:inherit;color:inherit;}
:target{scroll-margin-top:120px;}
#main-content{display:block;}

.mono,.num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;}

/* ===== 2. 焦点与无障碍 ===== */
:focus-visible{
  outline:2px solid var(--pepper);
  outline-offset:3px;
  border-radius:4px;
}
.skip-link{
  position:absolute;
  left:16px;
  top:-72px;
  z-index:200;
  padding:12px 20px;
  border-radius:0 0 10px 10px;
  background:var(--ink);
  color:var(--paper);
  font-size:14px;
  line-height:1.6;
  text-decoration:none;
  box-shadow:var(--shadow-lift);
  transition:top .2s ease;
}
.skip-link:focus{top:0;color:var(--paper);}

/* ===== 3. 页头：三座浮岛 ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  padding:14px var(--gutter) 0;
  background:linear-gradient(to bottom, rgba(251,247,240,.97) 0%, rgba(251,247,240,.86) 62%, rgba(251,247,240,0) 100%);
  transition:padding-top .24s ease;
}
.site-header.is-condensed{padding-top:6px;}

.header-shell{
  position:relative;
  display:flex;
  align-items:center;
  gap:8px;
  max-width:var(--wrap);
  margin:0 auto;
}

/* 署名挂牌 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:8px 18px 8px 12px;
  border:1px solid var(--rule);
  border-radius:var(--r-pill);
  background:rgba(251,247,240,.94);
  box-shadow:var(--shadow-float);
  text-decoration:none;
  color:var(--ink);
  transition:border-color .18s ease, padding .24s ease;
}
.brand:hover{border-color:var(--line-blue);color:var(--ink);}
.brand__mark{
  position:relative;
  flex:0 0 auto;
  width:22px;
  height:27px;
  border:1px solid var(--ink-2);
  border-radius:3px;
  background:var(--paper);
}
.brand__mark::before{
  content:"";
  position:absolute;
  inset:6px 4px auto 4px;
  height:11px;
  background:
    linear-gradient(var(--line-blue),var(--line-blue)) 0 0/100% 1px no-repeat,
    linear-gradient(var(--line-blue),var(--line-blue)) 0 5px/100% 1px no-repeat,
    linear-gradient(var(--pepper),var(--pepper)) 0 10px/64% 1px no-repeat;
}
.brand__mark::after{
  content:"";
  position:absolute;
  right:-3px;
  top:7px;
  width:5px;
  height:10px;
  border-radius:1px;
  background:var(--pepper);
}
.brand__text{display:flex;flex-direction:column;line-height:1.16;}
.brand__name{font-size:16px;font-weight:700;letter-spacing:.02em;}
.brand__sub{font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;color:var(--mist);}

/* 栏目胶囊 */
.nav{
  display:flex;
  align-items:center;
  margin-inline:auto;
  padding:5px;
  border:1px solid var(--rule);
  border-radius:var(--r-pill);
  background:rgba(251,247,240,.94);
  box-shadow:var(--shadow-float);
}
.nav__list{
  display:flex;
  align-items:center;
  gap:2px;
  list-style:none;
}
.nav__link{
  display:block;
  padding:8px 15px;
  border-radius:var(--r-pill);
  font-size:15px;
  line-height:1.4;
  color:var(--ink-2);
  text-decoration:none;
  white-space:nowrap;
  transition:background-color .18s ease, color .18s ease, padding .24s ease;
}
.nav__link:hover{background:var(--fog);color:var(--ink);}
.nav__link[aria-current="page"]{
  background:var(--ink);
  color:var(--paper);
  box-shadow:0 1px 0 rgba(27,42,51,.22);
}
.nav__foot{display:none;}
.nav__note{
  margin:10px 2px 0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--mist);
}

/* 行动按钮 */
.header-cta{display:flex;align-items:center;}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:6px;
  padding:11px 20px;
  border:1px solid transparent;
  border-radius:var(--r-pill);
  font-family:var(--font-sans);
  font-size:15px;
  line-height:1.4;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .18s ease, color .18s ease, border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.btn--pepper{
  background:var(--pepper);
  color:#FFF6F1;
  box-shadow:0 1px 0 rgba(107,28,10,.28);
}
.btn--pepper:hover{background:var(--pepper-deep);color:#FFF6F1;}
.btn--ghost{
  background:transparent;
  border-color:var(--rule);
  color:var(--ink);
}
.btn--ghost:hover{border-color:var(--ink-2);background:var(--fog);color:var(--ink);}
.btn--sm{padding:8px 14px;font-size:14px;}

/* 移动导航按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  padding:9px 14px;
  border:1px solid var(--rule);
  border-radius:var(--r-pill);
  background:rgba(251,247,240,.94);
  box-shadow:var(--shadow-float);
  color:var(--ink);
  font-size:14px;
  line-height:1;
  cursor:pointer;
  transition:border-color .18s ease, background-color .18s ease;
}
.nav-toggle:hover{border-color:var(--line-blue);}
.nav-toggle__box{
  display:inline-flex;
  flex-direction:column;
  justify-content:space-between;
  width:16px;
  height:12px;
}
.nav-toggle__bar{
  display:block;
  height:1.5px;
  border-radius:1px;
  background:currentColor;
  transition:transform .2s ease, opacity .2s ease;
}
.nav-toggle__label{font-size:13px;letter-spacing:.06em;}

/* 环节进度轨 */
.stagebar{
  display:flex;
  align-items:center;
  gap:12px;
  max-width:var(--wrap);
  margin:10px auto 0;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.12em;
  color:var(--mist);
  opacity:0;
  transform:translateY(-6px);
  pointer-events:none;
  transition:opacity .22s ease, transform .22s ease;
}
.stagebar.is-visible{opacity:1;transform:none;}
.stagebar__list{
  display:flex;
  align-items:center;
  gap:10px;
  list-style:none;
  flex-wrap:wrap;
}
.stagebar__step{
  position:relative;
  padding-left:10px;
  white-space:nowrap;
  transition:color .22s ease;
}
.stagebar__step::before{
  content:"";
  position:absolute;
  left:0;
  top:50%;
  width:4px;
  height:4px;
  margin-top:-2px;
  border-radius:50%;
  background:var(--line-blue);
}
.stagebar__step.is-current{color:var(--pepper);}
.stagebar__step.is-current::before{background:var(--pepper);}
.stagebar__step.is-past{color:var(--ink-2);}
.stagebar__step.is-past::before{background:var(--moss);}
.stagebar__track{
  position:relative;
  flex:1 1 60px;
  min-width:40px;
  height:1px;
  border-radius:1px;
  background:var(--rule);
  overflow:hidden;
}
.stagebar__fill{
  position:absolute;
  inset:0 auto 0 0;
  width:0;
  background:var(--pepper);
  transition:width .12s linear;
}

/* ===== 4. 内容基础件 ===== */
.wrap{
  max-width:var(--wrap);
  margin-inline:auto;
  padding-inline:var(--gutter);
}
.prose{max-width:720px;line-height:1.9;}
.prose p{margin:0 0 1.15em;}
.prose h2,.prose h3{margin-top:1.6em;}

.breadcrumb{
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--mist);
  margin:0 0 18px;
}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  list-style:none;
}
.breadcrumb__list li+li::before{
  content:"/";
  margin-right:8px;
  color:var(--line-blue);
}
.breadcrumb a{color:var(--ink-2);text-decoration:none;}
.breadcrumb a:hover{color:var(--pepper);}
.breadcrumb [aria-current="page"]{color:var(--ink);}

.grid{display:grid;gap:clamp(16px,2.4vw,28px);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}

.card{
  position:relative;
  padding:clamp(18px,2.4vw,28px);
  border:1px solid var(--rule);
  border-radius:var(--r-card);
  background:var(--card);
  box-shadow:var(--shadow-card);
}
.card h2,.card h3{margin-top:0;}

/* 图片容器（页面阶段放图用，共享外壳不含图片） */
.img-frame{
  position:relative;
  margin:0;
  border:1px solid var(--rule);
  border-radius:var(--r-card);
  background:var(--card);
  box-shadow:var(--shadow-card);
  overflow:hidden;
}
.img-frame > img,
.img-frame__media{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:4/3;
  object-fit:cover;
  background:var(--fog);
}
.img-frame--portrait > img,
.img-frame--portrait .img-frame__media{aspect-ratio:3/4;}
.img-frame--wide > img,
.img-frame--wide .img-frame__media{aspect-ratio:16/9;}
.img-frame--placeholder::before{
  content:"";
  display:block;
  aspect-ratio:4/3;
  background:
    repeating-linear-gradient(135deg, rgba(169,190,198,.28) 0 1px, transparent 1px 12px),
    linear-gradient(160deg,#EFE7DA,#E3EBEE);
}
.img-frame__caption{
  display:block;
  padding:10px 14px;
  border-top:1px solid var(--rule);
  background:rgba(251,247,240,.72);
  font-size:13px;
  line-height:1.7;
  color:var(--mist);
}

/* 入场显现 */
[data-reveal]{
  opacity:0;
  transform:translateY(8px);
  transition:opacity .5s ease, transform .5s cubic-bezier(.2,.8,.2,1);
  transition-delay:var(--d,0ms);
}
[data-reveal].is-in{opacity:1;transform:none;}

/* ===== 5. 页脚 ===== */
.site-footer{
  margin-top:clamp(64px,9vw,120px);
  background:#F7F1E8;
  border-top:1px solid var(--rule);
  color:var(--ink-2);
}
.footer-inner{
  max-width:var(--wrap);
  margin:0 auto;
  padding:clamp(36px,5vw,64px) var(--gutter) 24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.25fr 1fr .85fr;
  gap:clamp(24px,4vw,56px);
}
.footer-col{min-width:0;}
.footer-heading{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.18em;
  line-height:1.6;
  color:var(--mist);
}
.contact-list{list-style:none;display:grid;gap:10px;}
.contact-list li{
  display:grid;
  grid-template-columns:72px minmax(0,1fr);
  gap:10px;
  align-items:baseline;
  font-size:15px;
  line-height:1.8;
}
.contact-list__key{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--mist);
}
.contact-list__value{
  color:var(--ink);
  word-break:break-word;
  text-decoration:underline;
  text-decoration-color:var(--line-blue);
  text-decoration-thickness:1px;
  text-underline-offset:4px;
}
.footer-text{
  margin:0 0 16px;
  font-size:15px;
  line-height:1.85;
  color:var(--ink-2);
}
.footer-note{
  margin:14px 0 0;
  font-size:13px;
  line-height:1.7;
  color:var(--mist);
}
.footer-links{list-style:none;display:grid;gap:9px;}
.footer-links a{
  display:inline-block;
  padding-bottom:1px;
  border-bottom:1px solid transparent;
  font-size:15px;
  color:var(--ink-2);
  text-decoration:none;
  transition:color .18s ease, border-color .18s ease;
}
.footer-links a:hover{color:var(--ink);border-color:var(--pepper);}
.footer-base{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  justify-content:space-between;
  gap:10px 28px;
  margin-top:clamp(28px,4vw,48px);
  padding-top:18px;
  border-top:1px solid var(--rule);
}
.footer-brand{
  margin:0;
  font-size:13px;
  line-height:1.7;
  color:var(--mist);
}
.footer-legal{
  margin:0;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.06em;
  color:var(--mist);
}

/* ===== 6. 响应式 ===== */
@media (max-width:1024px){
  .nav__link{padding:8px 12px;font-size:14px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-col:last-child{grid-column:1 / -1;}
}

@media (max-width:900px){
  .nav-toggle{display:inline-flex;}
  .brand{margin-right:auto;}
  .brand__sub{display:none;}
  .header-cta{margin-left:8px;}

  .nav{
    position:absolute;
    top:calc(100% + 10px);
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    margin-inline:0;
    padding:10px;
    border-radius:18px;
    background:rgba(251,247,240,.99);
    box-shadow:var(--shadow-lift);
    max-height:calc(100vh - 150px);
    overflow-y:auto;
  }
  .nav-toggle[data-open]{
    background:var(--ink);
    border-color:var(--ink);
    color:var(--paper);
  }
  .nav-toggle[data-open] + .nav{
    display:flex;
    animation:nav-drop .22s cubic-bezier(.2,.8,.2,1);
  }
  .nav-toggle[data-open] .nav-toggle__bar:nth-child(1){transform:translateY(5px) rotate(45deg);}
  .nav-toggle[data-open] .nav-toggle__bar:nth-child(2){opacity:0;}
  .nav-toggle[data-open] .nav-toggle__bar:nth-child(3){transform:translateY(-5px) rotate(-45deg);}

  .nav__list{flex-direction:column;align-items:stretch;gap:2px;}
  .nav__link{
    padding:12px 14px;
    border-radius:12px;
    font-size:16px;
    white-space:normal;
  }
  .nav__link[aria-current="page"]{border-radius:12px;}
  .nav__foot{
    display:block;
    margin-top:8px;
    padding-top:12px;
    border-top:1px solid var(--rule);
  }
  .stagebar{font-size:10px;letter-spacing:.06em;gap:8px;}
  .grid--2,.grid--3{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-col:last-child{grid-column:auto;}
}

@media (max-width:560px){
  body{font-size:16px;}
  .site-header{padding-top:10px;}
  .brand{padding:7px 14px 7px 10px;}
  .brand__name{font-size:15px;}
  .header-cta .btn{padding:8px 12px;font-size:13px;}
  .stagebar__list{gap:8px;}
  .stagebar__step{padding-left:8px;}
  .contact-list li{grid-template-columns:1fr;gap:2px;}
  .footer-base{flex-direction:column;align-items:flex-start;}
}

@keyframes nav-drop{
  from{opacity:0;transform:translateY(-6px);}
  to{opacity:1;transform:none;}
}

/* ===== 7. 减动效 ===== */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    transition-delay:0ms !important;
  }
  [data-reveal]{opacity:1 !important;transform:none !important;}
  .stagebar{transform:none;}
}