/* ==========================================================================
   百人牛牛牌局 · 共享站点样式 /assets/site.css
   骨架：移动端顶栏 + 抽屉 / 桌面端 88px 左侧轨道
   ========================================================================== */

:root{
  --paper:#F8F5EC;
  --lake-deep:#0A4A5E;
  --lake-mist:#DCEFF2;
  --lake:#137A93;
  --sunset:#E36B2C;
  --sunset-pale:#F7D9C6;
  --barley:#6F8F3D;
  --barley-ink:#3F5520;
  --saffron:#A53A2F;
  --ink:#102B36;
  --stone:#65767A;

  --rail-w:88px;
  --bar-h:64px;
  --max-w:1180px;

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

  --hairline:rgba(16,43,54,.16);
  --hairline-light:rgba(248,245,236,.2);
  --ease:cubic-bezier(.32,.72,.3,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--bar-h) + 16px);
}
body{
  margin:0;
  padding-top:var(--bar-h);
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16.5px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg{display:block;max-width:100%;height:auto}
a{color:var(--lake-deep);text-underline-offset:3px}
p{margin:0 0 1.05em}
h1,h2,h3,h4{margin:0 0 .6em;font-weight:700;line-height:1.25}
ul,ol{margin:0 0 1.05em;padding-left:1.15em}
button,input,select,textarea{font:inherit}
::selection{background:var(--sunset-pale);color:var(--saffron)}
:focus-visible{outline:2px solid var(--sunset);outline-offset:2px}

/* ---------- skip link ---------- */
.skip-link{
  position:absolute;
  left:10px;
  top:-72px;
  z-index:120;
  padding:10px 18px;
  background:var(--sunset);
  color:#fff;
  font-size:.85rem;
  letter-spacing:.1em;
  text-decoration:none;
  transition:top .16s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{top:10px;outline:2px solid var(--ink);outline-offset:2px}

/* ---------- header：移动顶栏 ---------- */
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:80;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  height:var(--bar-h);
  padding:0 clamp(14px,3vw,22px);
  color:var(--paper);
  background:var(--lake-deep);
  background-image:
    linear-gradient(118deg,rgba(19,122,147,.55),rgba(10,74,94,0) 64%),
    repeating-linear-gradient(90deg,rgba(248,245,236,.05) 0 1px,transparent 1px 88px);
  border-bottom:1px solid rgba(248,245,236,.16);
}

.brand-mark{
  display:flex;
  align-items:center;
  gap:11px;
  min-width:0;
  color:var(--paper);
  text-decoration:none;
}
.brand-glyph{
  position:relative;
  flex:0 0 auto;
  display:block;
  width:26px;
  height:26px;
  border:1px solid rgba(248,245,236,.6);
  background:rgba(248,245,236,.04);
}
.brand-glyph::before{
  content:"";
  position:absolute;
  left:5px;
  right:5px;
  top:6px;
  height:1px;
  background:var(--sunset);
}
.brand-glyph::after{
  content:"";
  position:absolute;
  left:6px;
  right:6px;
  bottom:5px;
  height:1px;
  background:rgba(248,245,236,.5);
  transform:rotate(-26deg);
  transform-origin:left center;
}
.brand-text{display:flex;flex-direction:column;gap:1px;min-width:0}
.brand-name{
  font-family:var(--font-serif);
  font-weight:700;
  font-size:16px;
  line-height:1.2;
  letter-spacing:.09em;
  white-space:nowrap;
}
.brand-tagline{
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:rgba(248,245,236,.58);
  white-space:nowrap;
}
.brand-mark:hover .brand-name{color:#fff}
.brand-mark:hover .brand-glyph{border-color:var(--paper)}

.nav-toggle{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  padding:9px 12px;
  border:1px solid rgba(248,245,236,.34);
  border-radius:0;
  background:transparent;
  color:var(--paper);
  font-size:.76rem;
  letter-spacing:.18em;
  cursor:pointer;
  transition:background-color .18s var(--ease),border-color .18s var(--ease);
}
.nav-toggle:hover{background:rgba(248,245,236,.12);border-color:var(--paper)}
.nav-toggle-mark{
  display:block;
  width:16px;
  height:1.5px;
  background:currentColor;
  box-shadow:0 5px 0 currentColor,0 -5px 0 currentColor;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-mark{
  transform:rotate(-45deg);
  box-shadow:none;
}

/* ---------- header：导航（移动抽屉） ---------- */
.site-nav{
  position:fixed;
  top:var(--bar-h);
  left:0;
  right:0;
  bottom:0;
  z-index:56;
  display:flex;
  flex-direction:column;
  gap:18px;
  padding:26px 22px 34px;
  overflow-y:auto;
  color:var(--paper);
  background:var(--lake-deep);
  background-image:
    repeating-linear-gradient(90deg,rgba(248,245,236,.055) 0 1px,transparent 1px 72px),
    linear-gradient(198deg,rgba(19,122,147,.5),rgba(10,74,94,0) 72%);
  opacity:0;
  visibility:hidden;
  transform:translateY(-10px);
  transition:opacity .18s var(--ease),transform .2s var(--ease),visibility .2s var(--ease);
}
.site-header[data-open] .site-nav{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}

.nav-kicker{
  margin:0;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.28em;
  color:var(--sunset-pale);
}
.nav-list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:0;
}
.nav-item{border-bottom:1px solid rgba(248,245,236,.14)}
.nav-link{
  position:relative;
  display:flex;
  align-items:baseline;
  gap:14px;
  padding:14px 4px;
  color:rgba(248,245,236,.86);
  font-size:1.02rem;
  letter-spacing:.1em;
  text-decoration:none;
  transition:color .18s var(--ease),background-color .18s var(--ease),padding-left .18s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:4px;
  bottom:0;
  width:0;
  height:2px;
  background:var(--sunset);
  transition:width .18s var(--ease);
}
.nav-link:hover{
  color:#fff;
  background:rgba(248,245,236,.08);
  padding-left:12px;
}
.nav-link:hover::after{width:24px}
.nav-link[aria-current="page"]{color:#fff;font-weight:500}
.nav-link[aria-current="page"]::after{width:34px}
.nav-index{
  font-family:var(--font-mono);
  font-weight:600;
  font-size:.7rem;
  letter-spacing:.1em;
  color:var(--sunset);
}
.nav-link[aria-current="page"] .nav-index{color:var(--sunset-pale)}
.nav-label{line-height:1.2}

.nav-utility{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}
.nav-util{
  flex:1 1 40%;
  min-width:0;
  padding:12px 10px;
  border:1px solid rgba(248,245,236,.34);
  color:var(--paper);
  font-size:.84rem;
  letter-spacing:.12em;
  text-align:center;
  text-decoration:none;
  transition:background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.nav-util:hover{background:var(--sunset);border-color:var(--sunset);color:#fff}
.nav-foot{
  margin:auto 0 0;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.3em;
  color:rgba(248,245,236,.42);
}

/* ---------- 滚动进度 ---------- */
.rail-progress{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:2px;
  overflow:hidden;
  background:rgba(248,245,236,.14);
  pointer-events:none;
}
.rail-progress-fill{
  display:block;
  width:100%;
  height:100%;
  background:var(--sunset);
  transform:scaleX(var(--p,0));
  transform-origin:left center;
}

/* ---------- 桌面端：左侧 88px 轨道 ---------- */
@media (min-width:980px){
  html{scroll-padding-top:24px}
  body{padding-top:0;padding-left:var(--rail-w)}

  .site-header{
    top:0;
    left:0;
    right:auto;
    bottom:0;
    width:var(--rail-w);
    height:auto;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    padding:20px 0 16px;
    border-bottom:0;
    border-right:1px solid rgba(248,245,236,.16);
  }
  .brand-mark{
    flex-direction:column;
    justify-content:center;
    gap:10px;
    padding:0 6px;
    text-align:center;
  }
  .brand-glyph{width:28px;height:28px}
  .brand-text{align-items:center}
  .brand-name{
    font-size:12.5px;
    letter-spacing:.1em;
    line-height:1.35;
    white-space:normal;
    max-width:50px;
  }
  .brand-tagline{display:none}

  .nav-toggle{display:none}

  .site-nav{
    position:static;
    flex:1 1 auto;
    display:flex;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:0;
    padding:16px 0 6px;
    overflow-y:auto;
    overflow-x:hidden;
    background:none;
    border:0;
    opacity:1;
    visibility:visible;
    transform:none;
    transition:none;
  }
  .nav-kicker{display:none}
  .nav-list{
    margin:auto 0;
    flex-direction:column;
    align-items:center;
    gap:16px;
  }
  .nav-item{border-bottom:0;width:100%}
  .nav-link{
    flex-direction:column;
    align-items:center;
    gap:0;
    padding:0 0 16px;
    color:rgba(248,245,236,.78);
    font-size:.82rem;
    letter-spacing:.2em;
  }
  .nav-link:hover{padding-left:0;background:transparent;color:#fff}
  .nav-link::after{
    left:50%;
    bottom:0;
    width:13px;
    height:2px;
    transform:translateX(-50%);
  }
  .nav-link:hover::after{width:20px}
  .nav-link[aria-current="page"]{color:#fff}
  .nav-link[aria-current="page"]::after{width:26px}
  .nav-index{display:none}
  .nav-label{
    writing-mode:vertical-rl;
    line-height:1.15;
    letter-spacing:.22em;
  }

  .nav-utility{
    flex-direction:column;
    gap:6px;
    padding:0 10px;
    margin-bottom:10px;
  }
  .nav-util{
    flex:0 0 auto;
    padding:7px 2px;
    font-size:11px;
    letter-spacing:.04em;
    border-color:rgba(248,245,236,.28);
  }
  .nav-foot{display:none}

  .rail-progress{
    left:auto;
    right:0;
    top:0;
    bottom:0;
    width:2px;
    height:auto;
  }
  .rail-progress-fill{
    width:100%;
    height:100%;
    transform:scaleY(var(--p,0));
    transform-origin:center top;
  }
}

/* ---------- 页脚 ---------- */
.site-footer{
  color:var(--paper);
  background:var(--lake-deep);
  background-image:
    linear-gradient(168deg,rgba(19,122,147,.42),rgba(10,74,94,0) 62%),
    repeating-linear-gradient(90deg,rgba(248,245,236,.055) 0 1px,transparent 1px 96px),
    repeating-linear-gradient(0deg,rgba(248,245,236,.03) 0 1px,transparent 1px 96px);
  border-top:1px solid rgba(248,245,236,.18);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(26px,4vw,38px);
  width:100%;
  max-width:var(--max-w);
  margin-inline:auto;
  padding:clamp(40px,6vw,80px) clamp(20px,4vw,56px) clamp(26px,4vw,44px);
}
@media (min-width:900px){
  .footer-grid{
    grid-template-columns:minmax(0,1.25fr) minmax(0,.52fr) minmax(0,.55fr) minmax(0,1.1fr);
    gap:34px 42px;
  }
}
.footer-brand{min-width:0}
.footer-eyebrow{
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.24em;
  color:rgba(248,245,236,.55);
}
.footer-wordmark{
  margin:0 0 .35em;
  font-family:var(--font-serif);
  font-weight:700;
  font-size:clamp(1.55rem,3vw,2.1rem);
  line-height:1.2;
  letter-spacing:.06em;
  color:var(--paper);
}
.footer-tagline{
  margin:0;
  font-size:.88rem;
  letter-spacing:.16em;
  color:rgba(248,245,236,.68);
}
.footer-col{margin:0;min-width:0}
.footer-col-title{
  margin:0 0 14px;
  font-family:var(--font-mono);
  font-weight:600;
  font-size:.72rem;
  letter-spacing:.26em;
  color:var(--sunset-pale);
}
.footer-list{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.footer-link{
  display:inline-block;
  color:rgba(248,245,236,.82);
  font-size:.92rem;
  letter-spacing:.08em;
  text-decoration:none;
  border-bottom:1px solid transparent;
  padding-bottom:1px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-link:hover{color:#fff;border-bottom-color:var(--sunset)}

.footer-plate{
  position:relative;
  padding:clamp(18px,2.4vw,26px);
  background:rgba(248,245,236,.06);
  border:1px solid rgba(248,245,236,.24);
  min-width:0;
}
.footer-plate::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  width:56px;
  height:2px;
  background:var(--sunset);
}
.plate-title{
  margin:0 0 16px;
  font-family:var(--font-mono);
  font-weight:600;
  font-size:.72rem;
  letter-spacing:.26em;
  color:var(--sunset-pale);
}
.plate-list{list-style:none;margin:0 0 16px;padding:0;display:grid;gap:12px}
.plate-item{display:grid;gap:3px;min-width:0}
.plate-key{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.2em;
  color:rgba(248,245,236,.52);
}
.plate-value{
  width:fit-content;
  max-width:100%;
  font-size:.92rem;
  letter-spacing:.04em;
  color:var(--paper);
  text-decoration:none;
  word-break:break-all;
  border-bottom:1px solid rgba(248,245,236,.3);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.plate-value:hover{color:#fff;border-bottom-color:var(--sunset)}
.plate-value--text{border-bottom:0;color:rgba(248,245,236,.86);word-break:normal}
.plate-note{
  margin:0;
  font-size:.79rem;
  line-height:1.7;
  color:rgba(248,245,236,.6);
}
.plate-copy{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:6px}
.copy-btn{
  display:inline-flex;
  align-items:center;
  padding:6px 10px;
  background:transparent;
  border:1px solid rgba(248,245,236,.36);
  border-radius:0;
  color:var(--paper);
  font-size:.74rem;
  letter-spacing:.12em;
  cursor:pointer;
  transition:background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.copy-btn:hover{background:var(--sunset);border-color:var(--sunset);color:#fff}
.copy-feedback{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.08em;
  color:var(--sunset-pale);
  opacity:0;
  transform:translateY(2px);
  transition:opacity .16s var(--ease),transform .16s var(--ease);
}
.copy-feedback[data-visible]{opacity:1;transform:none}

.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:8px 24px;
  width:100%;
  max-width:var(--max-w);
  margin-inline:auto;
  padding:18px clamp(20px,4vw,56px) 30px;
  border-top:1px solid rgba(248,245,236,.18);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.1em;
  color:rgba(248,245,236,.6);
}
.footer-copy{margin:0}
.footer-icp{margin:0;color:rgba(248,245,236,.48)}

/* ---------- 通用布局 ---------- */
.container{
  width:100%;
  max-width:var(--max-w);
  margin-inline:auto;
  padding-inline:clamp(20px,4vw,56px);
}
.container--narrow{max-width:840px}

.section{padding-block:clamp(44px,6.5vw,88px)}
.section--paper{background:var(--paper)}
.section--mist{
  background:var(--lake-mist);
  background-image:
    repeating-linear-gradient(90deg,rgba(10,74,94,.06) 0 1px,transparent 1px 96px),
    repeating-linear-gradient(0deg,rgba(10,74,94,.04) 0 1px,transparent 1px 96px);
}
.section--deep{background:var(--lake-deep);color:var(--paper)}
.section--deep .section-title,.section--deep .lede{color:var(--paper)}
.section--deep .field-note{color:rgba(248,245,236,.72);border-left-color:var(--sunset)}

.split{display:grid;grid-template-columns:minmax(0,1fr);gap:clamp(24px,4vw,52px)}
@media (min-width:900px){
  .split{grid-template-columns:minmax(0,38fr) minmax(0,62fr);align-items:start}
  .split--reverse{grid-template-columns:minmax(0,62fr) minmax(0,38fr)}
}
.stack{display:grid;gap:clamp(14px,2vw,22px)}

/* ---------- 文本层级 ---------- */
.display-title{
  margin:0 0 .35em;
  font-family:var(--font-serif);
  font-weight:800;
  font-size:clamp(2.4rem,5vw,4.8rem);
  line-height:1.06;
  letter-spacing:.03em;
  color:var(--lake-deep);
}
.section-title{
  margin:0 0 .5em;
  font-family:var(--font-serif);
  font-weight:700;
  font-size:clamp(1.6rem,2.6vw,2.2rem);
  line-height:1.25;
  letter-spacing:.03em;
  color:var(--lake-deep);
}
.eyebrow{
  display:block;
  margin:0 0 12px;
  font-family:var(--font-mono);
  font-weight:600;
  font-size:.74rem;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--sunset);
}
.lede{
  max-width:34rem;
  margin:0 0 1.2em;
  font-size:1.06rem;
  line-height:1.85;
}
.field-note{
  max-width:32rem;
  margin:0 0 1.2em;
  padding-left:14px;
  border-left:2px solid var(--sunset-pale);
  font-size:.88rem;
  line-height:1.72;
  color:var(--stone);
}
.num{
  font-family:var(--font-mono);
  font-weight:600;
  letter-spacing:.04em;
  font-variant-numeric:tabular-nums;
}
.muted{color:var(--stone)}

.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:.5em;
  padding-bottom:2px;
  border-bottom:1px solid rgba(19,122,147,.42);
  color:var(--lake-deep);
  font-weight:500;
  text-decoration:none;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.link-arrow::after{
  content:"→";
  font-family:var(--font-mono);
  transition:transform .16s var(--ease);
}
.link-arrow:hover{color:var(--sunset);border-bottom-color:var(--sunset)}
.link-arrow:hover::after{transform:translateX(3px)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.6em;
  padding:.85em 1.45em;
  border:1px solid transparent;
  border-radius:0;
  background:var(--lake);
  color:var(--paper);
  font-size:.94rem;
  font-weight:500;
  letter-spacing:.08em;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn:hover{background:var(--lake-deep);color:#fff;transform:translateY(-2px)}
.btn--sunset{background:var(--sunset);color:#fff}
.btn--sunset:hover{background:#C75A1F}
.btn--ghost{background:transparent;border-color:rgba(16,43,54,.28);color:var(--ink)}
.btn--ghost:hover{background:rgba(19,122,147,.08);border-color:var(--lake);color:var(--lake-deep)}
.btn--light{background:transparent;border-color:rgba(248,245,236,.45);color:var(--paper)}
.btn--light:hover{background:rgba(248,245,236,.12);border-color:var(--paper);color:#fff}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5em;
  padding-block:18px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.14em;
  color:var(--stone);
}
.breadcrumb a{
  color:var(--lake-deep);
  text-decoration:none;
  border-bottom:1px solid rgba(19,122,147,.35);
}
.breadcrumb a:hover{border-bottom-color:var(--sunset);color:var(--sunset)}
.breadcrumb-sep{opacity:.6}

/* ---------- 卡片 ---------- */
.card{
  position:relative;
  padding:clamp(20px,2.4vw,30px);
  background:var(--paper);
  border:1px solid rgba(16,43,54,.18);
  min-width:0;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.card:hover{
  transform:translateY(-2px);
  border-color:var(--lake);
  box-shadow:0 16px 30px -22px rgba(10,74,94,.62);
}
.card--mist{background:var(--lake-mist);border-color:rgba(10,74,94,.22)}
.card--deep{background:var(--lake-deep);border-color:rgba(248,245,236,.22);color:var(--paper)}
.card--deep .section-title{color:var(--paper)}
.card--sunset{background:var(--sunset-pale);border-color:rgba(227,107,44,.42)}

.card-stagger{display:grid;grid-template-columns:minmax(0,1fr);gap:18px}
@media (min-width:860px){
  .card-stagger{grid-template-columns:repeat(12,minmax(0,1fr))}
  .card-stagger > *{grid-column:span 6}
  .card-stagger > *:nth-child(2){margin-top:34px}
  .card-stagger > *:nth-child(3){grid-column:2 / 9;margin-top:-8px}
  .card-stagger > *:nth-child(4){grid-column:8 / 13}
}

/* ---------- 步骤条 ---------- */
.steps{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:0;
}
.step{
  padding:18px 18px 18px 0;
  border-top:2px solid rgba(16,43,54,.14);
  min-width:0;
}
.step-num{
  display:block;
  margin-bottom:6px;
  font-family:var(--font-mono);
  font-weight:600;
  font-size:.95rem;
  letter-spacing:.12em;
  color:var(--sunset);
}
.step[data-active]{border-top-color:var(--sunset)}
.section--deep .step{border-top-color:rgba(248,245,236,.22)}
.section--deep .step[data-active]{border-top-color:var(--sunset)}
@media (min-width:760px){
  .steps{grid-auto-flow:column;grid-auto-columns:1fr;gap:0 24px}
}

/* ---------- 标签与说明牌 ---------- */
.exhibit-label{
  display:inline-flex;
  align-items:center;
  gap:.55em;
  padding:.35em .7em;
  background:var(--sunset-pale);
  border-left:2px solid var(--sunset);
  color:var(--saffron);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.16em;
}
.tag{
  display:inline-block;
  padding:.22em .6em;
  background:var(--lake-mist);
  border:1px solid rgba(10,74,94,.2);
  color:var(--lake-deep);
  font-size:.75rem;
  font-weight:500;
  letter-spacing:.12em;
  transition:background-color .18s var(--ease),border-color .18s var(--ease);
}
.tag:hover{background:var(--sunset-pale);border-color:rgba(227,107,44,.4)}
.tag--green{background:rgba(111,143,61,.16);border-color:rgba(111,143,61,.45);color:var(--barley-ink)}
.tag--green:hover{background:rgba(111,143,61,.26);border-color:var(--barley)}
.tag--red{background:rgba(165,58,47,.12);border-color:rgba(165,58,47,.4);color:var(--saffron)}
.tag--red:hover{background:rgba(165,58,47,.2);border-color:var(--saffron)}

/* ---------- 图片容器（页面阶段放占位图） ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  aspect-ratio:16 / 10;
  border:1px solid rgba(16,43,54,.18);
  background:var(--lake-mist);
  background-image:
    repeating-linear-gradient(135deg,rgba(10,74,94,.08) 0 1px,transparent 1px 14px),
    linear-gradient(152deg,rgba(19,122,147,.22),rgba(248,245,236,0) 70%);
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  filter:saturate(.86) contrast(1.03);
}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(10,74,94,.04),rgba(10,74,94,.18));
  pointer-events:none;
}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame--wide{aspect-ratio:21 / 9}
.media-caption{
  margin:10px 0 0;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.1em;
  color:var(--stone);
}
.section--deep .media-caption{color:rgba(248,245,236,.6)}

/* ---------- 滚动显现 ---------- */
[data-reveal]{transition:opacity .3s var(--ease),transform .3s var(--ease)}
.reveal-ready [data-reveal]{opacity:0;transform:translateY(8px)}
.reveal-ready [data-reveal][data-revealed]{opacity:1;transform:none}

/* ---------- 窄屏微调 ---------- */
@media (max-width:419px){
  .brand-tagline{display:none}
  .brand-name{font-size:15px}
}

/* ---------- 减弱动效 ---------- */
@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;
  }
  .reveal-ready [data-reveal]{opacity:1 !important;transform:none !important}
  .btn:hover,.card:hover{transform:none}
}