:root{
  --paper:#F7F0DE;
  --paper-deep:#EFE5CD;
  --ink:#241A16;
  --ink-soft:#4A3B33;
  --teal:#0E4F45;
  --teal-deep:#0A3A33;
  --jade:#167A68;
  --jade-bright:#11786A;
  --gold:#D6A23D;
  --gold-soft:#F3D48B;
  --vermilion:#C4472E;
  --jade-white:#FFFDF7;
  --gray-jade:#78938D;
  --sand:#E7D7B8;
  --line:rgba(36,26,22,.13);
  --line-soft:rgba(36,26,22,.07);
  --rail-w:276px;
  --radius-tile:16px;
  --radius-sm:10px;
  --shadow-card:0 1px 0 rgba(255,255,255,.7) inset,0 18px 34px -28px rgba(36,26,22,.6);
  --shadow-lift:0 1px 0 rgba(255,255,255,.7) inset,0 26px 44px -26px rgba(36,26,22,.5);
  --font-display:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}

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

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
html.nav-lock{overflow:hidden}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-body);
  font-size:clamp(16px,.5vw + 14.4px,17.5px);
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

main{display:block}

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

h1,h2,h3,h4{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.15;
  letter-spacing:-.015em;
  color:var(--ink);
  margin:0 0 .45em;
  text-wrap:balance;
}
h1{font-size:clamp(2rem,3.6vw + 1rem,3.4rem)}
h2{font-size:clamp(1.5rem,1.8vw + 1rem,2.1rem)}
h3{font-size:clamp(1.15,.6vw + 1rem,1.35rem)}
h4{font-size:1.02rem;letter-spacing:0}

p{margin:0 0 1em}
p:last-child{margin-bottom:0}

ul,ol{margin:0 0 1em;padding-left:1.15em}
li{margin:.2em 0}

a{color:var(--jade);text-underline-offset:.18em;text-decoration-thickness:1px}
a:hover{color:var(--teal)}

strong,b{font-weight:800}
small{font-size:.82rem}

button{font:inherit;color:inherit}

::selection{background:var(--gold-soft);color:var(--teal-deep)}

:focus-visible{
  outline:2px solid var(--gold);
  outline-offset:2px;
  box-shadow:0 0 0 5px rgba(10,58,51,.45);
}

/* ============ 布局容器 ============ */
.wrap{
  width:min(1120px,100%);
  margin-inline:auto;
  padding-inline:clamp(1.1rem,3vw,2.6rem);
}
.section{padding-block:clamp(2.2rem,5vw,4.2rem)}
.section--tight{padding-block:clamp(1.3rem,3vw,2.2rem)}

.section-head{
  display:grid;
  gap:.5rem;
  max-width:58ch;
  margin-bottom:clamp(1.2rem,2.6vw,2.1rem);
}
.eyebrow{
  display:flex;
  align-items:center;
  gap:.55rem;
  margin:0;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--vermilion);
}
.eyebrow::before{content:"";width:20px;height:2px;background:var(--gold);flex:none}
.section-title{
  margin:0;
  font-size:clamp(1.55rem,2.2vw + .6rem,2.3rem);
  font-weight:900;
  line-height:1.16;
  letter-spacing:-.015em;
}
.lede{
  margin:0;
  font-size:clamp(1rem,.5vw + .9rem,1.16rem);
  line-height:1.72;
  color:var(--ink-soft);
}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

.divider{
  height:0;
  border:0;
  border-top:1px solid var(--line);
  background:none;
  margin:clamp(1.4rem,3vw,2.4rem) 0;
}

/* ============ 网格 ============ */
.grid{display:grid;gap:clamp(1rem,2.2vw,1.9rem)}
.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:1fr}
.grid-split-wide{grid-template-columns:1fr}

@media (max-width:900px){
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:680px){
  .grid-2,.grid-3{grid-template-columns:1fr}
}
@media (min-width:960px){
  .grid-split{grid-template-columns:7fr 5fr;align-items:start}
  .grid-split-wide{grid-template-columns:8fr 4fr;align-items:start}
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.5rem;
  padding:.82rem 1.35rem;
  border-radius:12px;
  border:1px solid transparent;
  font-family:var(--font-display);
  font-weight:800;
  font-size:.95rem;
  line-height:1.2;
  letter-spacing:.03em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-primary{
  background:var(--jade);
  color:var(--jade-white);
  box-shadow:0 12px 24px -16px rgba(14,79,69,.95);
}
.btn-primary:hover{background:var(--jade-bright);color:var(--jade-white);transform:translateY(-2px)}
.btn-gold{
  background:var(--gold-soft);
  color:var(--teal-deep);
  border-color:rgba(214,162,61,.9);
  box-shadow:0 10px 20px -14px rgba(0,0,0,.55);
}
.btn-gold:hover{background:#F9E3AF;color:var(--teal-deep);transform:translateY(-2px)}
.btn-ghost{
  background:transparent;
  color:var(--teal);
  border-color:rgba(14,79,69,.35);
}
.btn-ghost:hover{background:rgba(14,79,69,.08);color:var(--teal);transform:translateY(-2px)}
.btn:active{transform:translateY(0)}

/* ============ 牌面卡片 ============ */
.tile-card{
  position:relative;
  background:var(--jade-white);
  border:1px solid var(--line);
  border-radius:var(--radius-tile);
  padding:clamp(1.05rem,2vw,1.7rem);
  box-shadow:var(--shadow-card);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.tile-card::after{
  content:"";
  position:absolute;
  inset:6px;
  border-radius:calc(var(--radius-tile) - 6px);
  border:1px dashed var(--line-soft);
  pointer-events:none;
}
.tile-card:hover{
  transform:translateY(-2px);
  border-color:rgba(214,162,61,.7);
  box-shadow:var(--shadow-lift);
}
.tile-card--deep{
  background:linear-gradient(158deg,#12665A 0%,#0E4F45 100%);
  border-color:rgba(243,212,139,.35);
  color:var(--jade-white);
}
.tile-card--deep::after{border-color:rgba(243,212,139,.24)}
.tile-card--gold{
  background:linear-gradient(158deg,#F7E3B4 0%,#F3D48B 100%);
  border-color:rgba(14,79,69,.2);
}
.card-kicker{
  margin:0 0 .45rem;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--vermilion);
}
.card-title{
  margin:0 0 .45rem;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(1.08rem,.6vw + .98rem,1.3rem);
  line-height:1.28;
  letter-spacing:-.01em;
}
.card-text{margin:0;font-size:.95rem;line-height:1.72;color:var(--ink-soft)}
.tile-card--deep .card-kicker{color:var(--gold-soft)}
.tile-card--deep .card-text{color:rgba(255,253,247,.84)}
.tile-card--deep .card-title{color:var(--jade-white)}

/* ============ 标签 ============ */
.tag{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.26rem .7rem;
  border-radius:999px;
  border:1px solid rgba(214,162,61,.55);
  background:rgba(243,212,139,.55);
  color:var(--teal);
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.1em;
  line-height:1.5;
  text-transform:uppercase;
}
.tag--red{background:rgba(196,71,46,.12);border-color:rgba(196,71,46,.38);color:#8E3320}
.tag--jade{background:rgba(22,122,104,.12);border-color:rgba(22,122,104,.35);color:var(--jade)}

/* ============ 图例式索引 ============ */
.legend-list{list-style:none;margin:0;padding:0;display:grid;gap:.15rem}
.legend-item{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:.8rem;
  align-items:baseline;
  padding:.6rem 0;
  border-bottom:1px solid var(--line-soft);
}
.legend-item:last-child{border-bottom:0}
.legend-key{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.1em;
  color:var(--teal);
  background:var(--gold-soft);
  border-radius:6px;
  padding:.14rem .45rem;
  white-space:nowrap;
}
.legend-text{font-size:.94rem;line-height:1.65;color:var(--ink-soft)}

/* ============ 编号规则列表 ============ */
.rule-list{list-style:none;margin:0;padding:0;counter-reset:rule;display:grid;gap:.75rem}
.rule-list > li{
  position:relative;
  padding-left:2.7rem;
  counter-increment:rule;
  font-size:.96rem;
  line-height:1.7;
  color:var(--ink-soft);
}
.rule-list > li::before{
  content:counter(rule,decimal-leading-zero);
  position:absolute;
  left:0;
  top:.2rem;
  font-family:var(--font-mono);
  font-size:.76rem;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--vermilion);
  background:rgba(196,71,46,.1);
  border-radius:6px;
  padding:.08rem .35rem;
}

/* ============ 数字指标 ============ */
.stat{display:grid;gap:.1rem}
.stat-value{
  font-family:var(--font-mono);
  font-weight:600;
  font-size:clamp(1.55rem,2.6vw,2.2rem);
  line-height:1.15;
  letter-spacing:-.02em;
  color:var(--teal);
}
.stat-label{font-size:.8rem;color:var(--ink-soft);letter-spacing:.02em}

/* ============ 提示块 ============ */
.callout{
  margin:0;
  padding:1rem 1.15rem;
  border-left:3px solid var(--gold);
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  background:rgba(243,212,139,.28);
  color:var(--ink);
  font-size:.95rem;
  line-height:1.7;
}

/* ============ 图片容器基础 ============ */
.media-frame{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius-tile);
  border:1px solid var(--line);
  background:linear-gradient(150deg,var(--sand) 0%,#F1E2C2 60%,#F3D48B 100%);
  aspect-ratio:16/10;
}
.media-frame img,
.media-frame video{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--tall{aspect-ratio:3/4}
.media-caption{
  margin:.6rem 0 0;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.04em;
  color:var(--ink-soft);
}

/* ============ 面包屑 ============ */
.breadcrumb{
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.06em;
  color:var(--ink-soft);
}
.breadcrumb ol{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.35rem;
  list-style:none;
  margin:0;
  padding:0;
}
.breadcrumb li{display:inline-flex;align-items:center;gap:.35rem}
.breadcrumb li:not(:first-child)::before{content:"›";color:var(--gold);font-size:.9rem;line-height:1}
.breadcrumb a{color:var(--jade);text-decoration:none;border-bottom:1px solid rgba(22,122,104,.28)}
.breadcrumb a:hover{color:var(--teal);border-bottom-color:var(--gold)}
.breadcrumb [aria-current="page"]{color:var(--ink);font-weight:600}

/* ============ 标签页 ============ */
.tabs{display:block}
.tab-list{
  display:flex;
  flex-wrap:wrap;
  gap:.35rem;
  padding:.35rem;
  border:1px solid var(--line);
  border-radius:14px;
  background:rgba(14,79,69,.06);
}
.tab{
  appearance:none;
  border:1px solid transparent;
  background:transparent;
  border-radius:10px;
  padding:.55rem 1rem;
  font-family:var(--font-display);
  font-weight:700;
  font-size:.9rem;
  letter-spacing:.02em;
  color:var(--ink-soft);
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.tab:hover{background:rgba(255,253,247,.85);color:var(--teal)}
.tab[aria-selected="true"]{
  background:var(--jade-white);
  color:var(--teal);
  border-color:rgba(214,162,61,.65);
  box-shadow:0 8px 18px -14px rgba(14,79,69,.9);
}
.tab-panel{padding-top:1.1rem}
.tab-panel[hidden]{display:none}

/* ============ 渐显 ============ */
html.has-reveal [data-reveal]{
  opacity:0;
  transform:translateY(16px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
html.has-reveal [data-reveal].is-visible{opacity:1;transform:none}

/* ============ 头部：牌桌边缘侧轨 ============ */
.skip-link{
  position:fixed;
  top:.5rem;
  left:.5rem;
  z-index:120;
  padding:.7rem 1.05rem;
  border-radius:10px;
  background:var(--jade-white);
  color:var(--teal);
  font-family:var(--font-display);
  font-weight:800;
  font-size:.9rem;
  text-decoration:none;
  box-shadow:0 16px 30px -18px rgba(10,58,51,.9);
  transform:translateY(-170%);
  transition:transform .18s var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:translateY(0)}

.reading-progress{
  position:fixed;
  top:0;
  left:0;
  right:0;
  height:3px;
  z-index:90;
  background:rgba(14,79,69,.14);
  pointer-events:none;
}
.reading-progress-fill{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--jade) 0%,var(--gold) 100%);
  transition:width .12s linear;
}

.site-header{
  position:fixed;
  inset:0 auto 0 0;
  z-index:60;
  width:var(--rail-w);
  display:flex;
  flex-direction:column;
  padding:clamp(1rem,2vw,1.5rem) 1.05rem 1.3rem;
  background:linear-gradient(180deg,rgba(14,79,69,.96) 0%,rgba(10,58,51,.97) 100%);
  color:var(--jade-white);
  border-right:1px solid rgba(243,212,139,.32);
  box-shadow:20px 0 48px -38px rgba(10,58,51,.95);
  -webkit-backdrop-filter:blur(10px) saturate(1.15);
  backdrop-filter:blur(10px) saturate(1.15);
  overflow-y:auto;
  overscroll-behavior:contain;
}
.site-header::after{
  content:"";
  position:absolute;
  top:0;
  right:0;
  bottom:0;
  width:4px;
  background:repeating-linear-gradient(180deg,rgba(243,212,139,.6) 0 12px,transparent 12px 26px);
  opacity:.32;
  pointer-events:none;
}

.masthead{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:.6rem;
  padding-bottom:.85rem;
  border-bottom:1px solid rgba(243,212,139,.24);
}

.brand-lockup{
  display:flex;
  align-items:center;
  gap:.65rem;
  color:inherit;
  text-decoration:none;
}
.brand-mark{
  display:grid;
  place-items:center;
  width:44px;
  height:52px;
  flex:none;
  border-radius:10px;
  border:1px solid rgba(214,162,61,.55);
  background:var(--jade-white);
  color:var(--teal);
  font-family:var(--font-display);
  font-weight:900;
  font-size:1.3rem;
  line-height:1;
  box-shadow:inset 0 -4px 0 rgba(214,162,61,.8),0 8px 16px -10px rgba(0,0,0,.7);
}
.brand-text{display:flex;flex-direction:column;line-height:1.12;min-width:0}
.brand-name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:1.02rem;
  letter-spacing:.02em;
  color:var(--jade-white);
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold-soft);
}

.utility-line{
  margin:.85rem 0 0;
  font-family:var(--font-mono);
  font-size:.7rem;
  line-height:1.55;
  letter-spacing:.07em;
  color:rgba(255,253,247,.6);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  padding:.5rem .75rem;
  border-radius:10px;
  border:1px solid rgba(243,212,139,.5);
  background:rgba(255,253,247,.1);
  color:var(--jade-white);
  font-family:var(--font-display);
  font-weight:700;
  font-size:.82rem;
  letter-spacing:.08em;
  cursor:pointer;
}
.nav-toggle:hover{background:rgba(255,253,247,.18)}
.nav-toggle-icon{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:background-color .18s var(--ease);
}
.nav-toggle-icon::before,
.nav-toggle-icon::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .2s var(--ease);
}
.nav-toggle-icon::before{top:-6px}
.nav-toggle-icon::after{top:6px}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon{background:transparent}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after{transform:translateY(-6px) rotate(-45deg)}
.nav-toggle-text{font-size:.8rem}

.site-nav{
  margin-top:1.05rem;
  display:flex;
  flex-direction:column;
  gap:.85rem;
  flex:1 1 auto;
  min-height:0;
}
.rail-label{
  margin:0;
  font-family:var(--font-mono);
  font-size:.66rem;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:rgba(243,212,139,.9);
}
.nav-list{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-direction:column;
  gap:.22rem;
}
.nav-list li{margin:0}
.nav-link{
  display:flex;
  align-items:baseline;
  gap:.7rem;
  padding:.58rem .7rem;
  border-radius:10px;
  border:1px solid transparent;
  color:rgba(255,253,247,.84);
  text-decoration:none;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.nav-link:hover{background:rgba(255,253,247,.1);color:var(--jade-white)}
.nav-link[aria-current="page"]{
  background:rgba(255,253,247,.15);
  color:var(--jade-white);
  border-color:rgba(243,212,139,.5);
  box-shadow:inset 3px 0 0 var(--gold);
}
.nav-index{
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.08em;
  color:var(--gold);
  flex:none;
}
.nav-link[aria-current="page"] .nav-index{color:var(--gold-soft)}
.nav-label{
  font-family:var(--font-display);
  font-weight:700;
  font-size:.95rem;
  letter-spacing:.02em;
}

.rail-foot{
  margin-top:auto;
  padding-top:1rem;
  border-top:1px solid rgba(243,212,139,.22);
  display:grid;
  gap:.55rem;
}
.rail-cta{width:100%}
.rail-note{
  margin:0;
  font-family:var(--font-mono);
  font-size:.66rem;
  line-height:1.6;
  letter-spacing:.06em;
  color:rgba(255,253,247,.52);
}

.nav-scrim{display:none}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  background:linear-gradient(180deg,#0E4F45 0%,#0A3A33 100%);
  color:rgba(255,253,247,.82);
  padding:clamp(2.1rem,4.5vw,3.6rem) clamp(1.1rem,3.5vw,2.8rem) 1.6rem;
  border-top:1px solid rgba(243,212,139,.35);
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:6px;
  background:repeating-linear-gradient(90deg,var(--gold) 0 14px,transparent 14px 28px);
  opacity:.35;
}
.footer-inner{
  width:min(1120px,100%);
  margin-inline:auto;
  display:grid;
  gap:clamp(1.6rem,3vw,2.4rem);
}
.footer-top{
  display:grid;
  grid-template-columns:1fr;
  gap:clamp(1.4rem,3vw,2.2rem);
}
.footer-brand-name{
  display:flex;
  align-items:center;
  gap:.6rem;
  margin:0 0 .55rem;
  font-family:var(--font-display);
  font-weight:900;
  font-size:1.1rem;
  letter-spacing:.02em;
  color:var(--jade-white);
}
.footer-brand-name::before{
  content:"";
  width:.85rem;
  height:1.15rem;
  border-radius:3px;
  background:var(--gold-soft);
  box-shadow:inset 0 -3px 0 rgba(196,71,46,.85);
  flex:none;
}
.footer-summary{
  margin:0;
  max-width:34ch;
  font-size:.92rem;
  line-height:1.72;
  color:rgba(255,253,247,.72);
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1.2rem;
}
.footer-col-title{
  margin:0 0 .7rem;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--gold-soft);
}
.footer-links{list-style:none;margin:0;padding:0;display:grid;gap:.45rem}
.footer-links li{margin:0}
.footer-link{
  display:inline-block;
  color:rgba(255,253,247,.82);
  text-decoration:none;
  font-size:.94rem;
  border-bottom:1px solid transparent;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.footer-link:hover{color:var(--jade-white);border-bottom-color:var(--gold)}
.footer-contact{display:grid;gap:0}
.contact-list{list-style:none;margin:0;padding:0;display:grid;gap:.55rem}
.contact-list li{margin:0}
.contact-item{
  display:grid;
  gap:.05rem;
  padding-bottom:.45rem;
  border-bottom:1px dashed rgba(255,253,247,.14);
}
.contact-label{
  font-family:var(--font-mono);
  font-size:.64rem;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--gold-soft);
}
.contact-value{
  font-size:.9rem;
  line-height:1.6;
  color:rgba(255,253,247,.9);
  word-break:break-word;
}
.footer-note{
  margin:.75rem 0 0;
  font-family:var(--font-mono);
  font-size:.7rem;
  line-height:1.65;
  letter-spacing:.04em;
  color:rgba(255,253,247,.55);
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.7rem 1.4rem;
  padding-top:1.1rem;
  border-top:1px solid rgba(255,253,247,.16);
}
.footer-legal{
  list-style:none;
  margin:0;
  padding:0;
  display:flex;
  flex-wrap:wrap;
  gap:.5rem 1.2rem;
}
.footer-legal li{margin:0}
.legal-link{
  color:rgba(255,253,247,.8);
  text-decoration:none;
  font-size:.84rem;
  border-bottom:1px solid rgba(243,212,139,.4);
  padding-bottom:2px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.legal-link:hover{color:var(--gold-soft);border-bottom-color:var(--gold-soft)}
.footer-icp{
  margin:0;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.04em;
  color:rgba(255,253,247,.6);
}
.footer-copy{margin:0;font-size:.8rem;color:rgba(255,253,247,.55)}
.to-top{
  padding:.45rem .85rem;
  border-radius:999px;
  border:1px solid rgba(243,212,139,.5);
  background:transparent;
  color:var(--gold-soft);
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.1em;
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.to-top:hover{background:var(--gold-soft);color:var(--teal-deep);transform:translateY(-2px)}

/* ============ 响应式 ============ */
@media (min-width:720px){
  .footer-top{grid-template-columns:1fr 1fr}
  .footer-contact{grid-column:1 / -1}
}
@media (min-width:1080px){
  body{padding-left:var(--rail-w)}
  .skip-link{left:calc(var(--rail-w) + .5rem)}
  .reading-progress{left:var(--rail-w)}
  .footer-top{grid-template-columns:1.15fr 1.1fr 1.05fr}
  .footer-contact{grid-column:auto}
}

@media (max-width:1079px){
  .site-header{
    position:sticky;
    inset:auto;
    top:0;
    width:auto;
    height:auto;
    display:block;
    padding:.65rem clamp(.9rem,3.2vw,1.5rem);
    border-right:0;
    border-bottom:1px solid rgba(243,212,139,.3);
    box-shadow:0 14px 30px -26px rgba(10,58,51,.95);
    overflow:visible;
    -webkit-backdrop-filter:none;
    backdrop-filter:none;
  }
  .site-header::after{display:none}
  .masthead{position:relative;z-index:80;padding-bottom:0;border-bottom:0}
  .utility-line{display:none}
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;
    inset:0 auto 0 0;
    z-index:70;
    width:min(86vw,330px);
    margin:0;
    padding:4.8rem 1.1rem 1.6rem;
    background:linear-gradient(180deg,#0E4F45 0%,#0A3A33 100%);
    border-right:1px solid rgba(243,212,139,.3);
    box-shadow:28px 0 60px -32px rgba(0,0,0,.85);
    overflow-y:auto;
    overscroll-behavior:contain;
    transform:translateX(-104%);
    opacity:0;
    visibility:hidden;
    transition:transform .26s var(--ease),opacity .2s var(--ease),visibility .26s var(--ease);
  }
  .site-header[data-open] .site-nav{
    transform:translateX(0);
    opacity:1;
    visibility:visible;
  }
  .nav-scrim{
    display:block;
    position:fixed;
    inset:0;
    z-index:65;
    background:rgba(10,58,51,.5);
    -webkit-backdrop-filter:blur(3px);
    backdrop-filter:blur(3px);
    opacity:0;
    visibility:hidden;
    transition:opacity .22s var(--ease),visibility .22s var(--ease);
  }
  .site-header[data-open] .nav-scrim{opacity:1;visibility:visible}
  #main-content{scroll-margin-top:84px}
}

@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-reveal [data-reveal]{opacity:1;transform:none}
  .reading-progress-fill{transition:none}
  .btn:hover,
  .tile-card:hover,
  .to-top:hover{transform:none}
}