*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
table{border-collapse:collapse;width:100%}

:root{
  --ink-900:#0A0C11;
  --ink-800:#12161F;
  --ink-700:#1A2030;
  --line:#2A3242;
  --gold-500:#F2A03C;
  --gold-300:#FFC46B;
  --gold-700:#B26A16;
  --volt-400:#4FC3F7;
  --volt-700:#1B6FBF;
  --paper:#F4F1EA;
  --muted:#9BA6B7;
  --plum:#3B2650;
  --wine:#5C2233;

  --font-display:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono","Roboto Mono","SFMono-Regular",Consolas,"Liberation Mono",monospace;

  --fs-12:0.75rem;
  --fs-14:0.875rem;
  --fs-16:1rem;
  --fs-18:1.125rem;
  --fs-24:1.5rem;
  --fs-32:2rem;
  --fs-48:3rem;
  --fs-72:4.5rem;
  --fs-96:6rem;

  --rail-w:88px;
  --rail-open:240px;
  --header-h:64px;
  --gutter:clamp(20px,4vw,48px);
  --radius-sm:12px;
  --radius-md:20px;
  --radius-lg:28px;
  --radius-pill:999px;
  --shadow-lift:0 18px 44px rgba(0,0,0,.52);
  --ease:cubic-bezier(.22,.61,.36,1);
  --scroll-ratio:0;
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
}

html{background:var(--ink-900)}

body{
  padding-inline-start:var(--rail-w);
  background:var(--ink-900);
  color:var(--paper);
  font-family:var(--font-body);
  font-size:var(--fs-16);
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(42,50,66,.28) 1px,transparent 1px),
    linear-gradient(90deg,rgba(42,50,66,.28) 1px,transparent 1px);
  background-size:120px 120px;
  opacity:.34;
  mask-image:radial-gradient(circle at 30% 12%,#000 0%,transparent 72%);
  -webkit-mask-image:radial-gradient(circle at 30% 12%,#000 0%,transparent 72%);
}

h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.06;
  letter-spacing:-.02em;
  color:var(--paper);
}
h1{font-size:clamp(2.5rem,6vw,var(--fs-72))}
h2{font-size:clamp(1.75rem,3.6vw,var(--fs-48))}
h3{font-size:clamp(1.25rem,2.2vw,var(--fs-32))}
h4{font-size:var(--fs-24)}

p{text-wrap:pretty}

a{transition:color 180ms var(--ease),border-color 180ms var(--ease),background 180ms var(--ease)}

:focus-visible{
  outline:2px solid var(--gold-300);
  outline-offset:3px;
  border-radius:6px;
}

::selection{background:rgba(242,160,60,.32);color:var(--paper)}

.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.skip-link{
  position:fixed;
  top:10px;
  left:10px;
  z-index:400;
  padding:12px 22px;
  border-radius:var(--radius-pill);
  background:var(--gold-500);
  color:#170D02;
  font-family:var(--font-display);
  font-weight:800;
  font-size:var(--fs-14);
  letter-spacing:.04em;
  transform:translateY(-180%);
  transition:transform 200ms var(--ease);
}
.skip-link:focus,
.skip-link:focus-visible{transform:none}

/* ---------- 轨道外壳 ---------- */
.site-header{
  position:fixed;
  inset-block:0;
  inset-inline-start:0;
  z-index:120;
  width:var(--rail-w);
}

.rail-progress{
  position:fixed;
  left:0;
  bottom:0;
  z-index:140;
  width:3px;
  height:100vh;
  transform-origin:bottom center;
  transform:scaleY(var(--scroll-ratio));
  background:linear-gradient(to top,var(--gold-700),var(--gold-500) 55%,var(--gold-300));
  box-shadow:0 0 14px rgba(242,160,60,.5);
  pointer-events:none;
}

.nav-scrim{
  position:fixed;
  inset:0;
  z-index:1;
  background:rgba(4,6,10,.68);
  opacity:0;
  pointer-events:none;
  transition:opacity 240ms var(--ease);
}
.site-header[data-open] .nav-scrim{opacity:1;pointer-events:auto}

.rail{
  position:absolute;
  inset-block:0;
  inset-inline-start:0;
  z-index:2;
  display:flex;
  flex-direction:column;
  width:var(--rail-w);
  background:var(--ink-800);
  border-inline-end:1px solid var(--line);
  overflow:hidden;
  transition:width 260ms var(--ease),background 260ms var(--ease),box-shadow 260ms var(--ease);
}
.site-header[data-open] .rail{
  width:var(--rail-open);
  background:var(--ink-700);
  box-shadow:var(--shadow-lift);
}

.rail-top{
  flex:0 0 auto;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:14px;
  padding:20px 0 18px;
  border-block-end:1px solid var(--line);
  transition:padding 260ms var(--ease),align-items 260ms var(--ease);
}
.site-header[data-open] .rail-top{
  align-items:flex-start;
  padding-inline:20px;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:0;
}
.brand-mark{
  flex:0 0 auto;
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  border-radius:14px;
  background:linear-gradient(150deg,var(--gold-300),var(--gold-500) 56%,var(--gold-700));
  color:#170D02;
  font-family:var(--font-display);
  font-size:var(--fs-24);
  font-weight:900;
  line-height:1;
  letter-spacing:-.05em;
  box-shadow:0 0 0 1px rgba(255,196,107,.34),0 8px 20px rgba(242,160,60,.26);
  transition:box-shadow 200ms var(--ease),transform 200ms var(--ease);
}
.brand:hover .brand-mark{
  box-shadow:0 0 0 1px rgba(255,196,107,.6),0 10px 26px rgba(242,160,60,.4);
  transform:translateY(-1px);
}
.brand-words{
  display:flex;
  flex-direction:column;
  line-height:1.25;
  max-width:0;
  opacity:0;
  overflow:hidden;
  white-space:nowrap;
  transition:max-width 260ms var(--ease),opacity 200ms var(--ease);
}
.site-header[data-open] .brand-words{max-width:150px;opacity:1}
.brand-name{
  font-family:var(--font-display);
  font-weight:900;
  font-size:var(--fs-16);
  letter-spacing:.01em;
  color:var(--paper);
}
.brand-tag{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--gold-500);
}

.rail-toggle{
  display:grid;
  place-content:center;
  gap:4px;
  width:44px;
  height:44px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  transition:border-color 200ms var(--ease),background 200ms var(--ease);
}
.rail-toggle:hover{border-color:var(--gold-500);background:rgba(242,160,60,.12)}
.rail-toggle-bar{
  display:block;
  width:18px;
  height:2px;
  border-radius:2px;
  background:var(--gold-300);
  transition:transform 240ms var(--ease),opacity 160ms var(--ease);
}
.site-header[data-open] .rail-toggle-bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .rail-toggle-bar:nth-child(2){opacity:0}
.site-header[data-open] .rail-toggle-bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.site-nav{
  flex:1 1 auto;
  overflow-y:auto;
  overflow-x:hidden;
  padding-block:18px;
  scrollbar-width:thin;
  scrollbar-color:var(--line) transparent;
}
.nav-list{
  display:flex;
  flex-direction:column;
  gap:4px;
  padding-inline:20px;
}
.nav-link{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:0;
  width:48px;
  height:48px;
  padding-inline:0;
  border-radius:var(--radius-pill);
  color:var(--muted);
  white-space:nowrap;
  transition:width 260ms var(--ease),color 200ms var(--ease),background 200ms var(--ease),box-shadow 200ms var(--ease),gap 260ms var(--ease),padding 260ms var(--ease);
}
.site-header[data-open] .nav-link{
  width:100%;
  justify-content:flex-start;
  gap:12px;
  padding-inline:14px;
}
.nav-idx{
  flex:0 0 auto;
  width:20px;
  text-align:center;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  font-weight:700;
  letter-spacing:.04em;
  color:var(--gold-700);
  transition:color 200ms var(--ease);
}
.nav-label{
  max-width:0;
  opacity:0;
  overflow:hidden;
  font-size:var(--fs-14);
  font-weight:600;
  letter-spacing:.02em;
  transition:max-width 260ms var(--ease),opacity 200ms var(--ease);
}
.site-header[data-open] .nav-label{max-width:140px;opacity:1}
.nav-link:hover{color:var(--paper);background:rgba(255,255,255,.055)}
.nav-link:hover .nav-idx{color:var(--gold-300)}
.nav-link[aria-current="page"]{
  background:var(--ink-900);
  color:var(--gold-300);
  box-shadow:inset 0 0 0 1px rgba(242,160,60,.42);
}
.nav-link[aria-current="page"] .nav-idx{color:var(--gold-300)}
.nav-link[aria-current="page"]::after{
  content:"";
  flex:0 0 auto;
  width:6px;
  height:6px;
  margin-inline-start:auto;
  border-radius:50%;
  background:var(--gold-500);
  box-shadow:0 0 8px rgba(242,160,60,.8);
  opacity:0;
  transition:opacity 200ms var(--ease);
}
.site-header[data-open] .nav-link[aria-current="page"]::after{opacity:1}

.rail-foot{
  flex:0 0 auto;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
  padding:16px 20px 24px;
  border-block-start:1px solid var(--line);
  transition:align-items 260ms var(--ease);
}
.site-header[data-open] .rail-foot{align-items:stretch}
.rail-status{
  display:flex;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--muted);
  white-space:nowrap;
}
.rail-dot{
  flex:0 0 auto;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--volt-400);
  box-shadow:0 0 0 4px rgba(79,195,247,.14);
  animation:dot-pulse 2.8s var(--ease) infinite;
}
@keyframes dot-pulse{
  0%,100%{box-shadow:0 0 0 3px rgba(79,195,247,.14)}
  50%{box-shadow:0 0 0 7px rgba(79,195,247,.05)}
}
.rail-meta{
  max-width:0;
  opacity:0;
  overflow:hidden;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--muted);
  white-space:nowrap;
  transition:max-width 260ms var(--ease),opacity 200ms var(--ease);
}
.site-header[data-open] .rail-meta{max-width:180px;opacity:1}
.rail-meta--sub{font-size:10px;letter-spacing:.14em;color:#6E7A8C}
.site-header[data-open] .rail-meta--sub{max-width:180px;opacity:1}

.rail-cta{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  width:44px;
  height:44px;
  border-radius:var(--radius-pill);
  background:var(--gold-500);
  color:#170D02;
  font-family:var(--font-display);
  font-weight:800;
  font-size:var(--fs-14);
  letter-spacing:.04em;
  transition:width 260ms var(--ease),background 200ms var(--ease),transform 160ms var(--ease);
}
.site-header[data-open] .rail-cta{width:100%}
.rail-cta:hover{background:var(--gold-300)}
.rail-cta:active{transform:scale(.96)}
.rail-cta-text{
  max-width:0;
  opacity:0;
  overflow:hidden;
  white-space:nowrap;
  transition:max-width 260ms var(--ease),opacity 180ms var(--ease);
}
.site-header[data-open] .rail-cta-text{max-width:90px;opacity:1}
.rail-cta-arrow{font-family:var(--font-mono);font-weight:700;line-height:1}

/* ---------- 版心与网格 ---------- */
.container{
  position:relative;
  z-index:1;
  width:100%;
  max-width:1320px;
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{padding-block:clamp(48px,7vw,96px)}
.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  margin-block-end:clamp(24px,3vw,40px);
}
.section-title{font-size:clamp(1.75rem,3.6vw,2.75rem)}

.grid-12{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(16px,2.4vw,32px);
}
.col-7{grid-column:span 7}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-12{grid-column:span 12}

.prose{max-width:34em}
.prose p+p{margin-block-start:1.4em}
.prose h2,.prose h3{margin-block-start:1.8em;margin-block-end:.55em}
.prose ul{margin-block-start:1em;display:grid;gap:.5em}
.prose ul li{padding-inline-start:1.2em;position:relative}
.prose ul li::before{
  content:"";
  position:absolute;
  left:0;
  top:.85em;
  width:6px;
  height:6px;
  border-radius:2px;
  background:var(--gold-500);
}

/* ---------- 文本件 ---------- */
.mono{font-family:var(--font-mono);font-weight:700;font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1;letter-spacing:.02em}
.hl-gold{color:var(--gold-300)}
.hl-volt{color:var(--volt-400)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  font-weight:700;
  letter-spacing:.2em;
  color:var(--gold-500);
}
.eyebrow::before{content:"";width:24px;height:2px;border-radius:2px;background:currentColor}

.index-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:24px;
  padding-block:6px;
  border-block-end:1px solid var(--line);
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.14em;
  color:var(--muted);
}
.index-row-num{color:var(--gold-500);font-weight:700;flex:0 0 auto}
.index-row-name{flex:1 1 auto;color:var(--paper);letter-spacing:.12em}
.index-row-meta{flex:0 0 auto;color:var(--muted);letter-spacing:.08em}

.quote{
  position:relative;
  padding-inline-start:22px;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(1.5rem,3.4vw,2.5rem);
  line-height:1.3;
  letter-spacing:-.01em;
  color:var(--paper);
}
.quote::before{
  content:"";
  position:absolute;
  left:0;
  top:.18em;
  bottom:.18em;
  width:4px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--gold-300),var(--gold-700));
}

/* ---------- 按钮与筛选 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  min-height:48px;
  padding-inline:26px;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-family:var(--font-display);
  font-weight:800;
  font-size:var(--fs-14);
  letter-spacing:.05em;
  white-space:nowrap;
  transition:background 200ms var(--ease),color 200ms var(--ease),border-color 200ms var(--ease),box-shadow 200ms var(--ease),transform 160ms var(--ease);
}
.btn:active{transform:scale(.975)}
.btn-primary{background:var(--gold-500);color:#170D02;box-shadow:0 12px 28px rgba(242,160,60,.22)}
.btn-primary:hover{background:var(--gold-300);box-shadow:0 16px 34px rgba(242,160,60,.32)}
.btn-ghost{background:transparent;color:var(--paper);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--gold-500);color:var(--gold-300);background:rgba(242,160,60,.09)}
.btn-volt{background:transparent;color:var(--volt-400);border-color:rgba(79,195,247,.42)}
.btn-volt:hover{background:rgba(79,195,247,.12);border-color:var(--volt-400)}

.filter-bar{display:flex;flex-wrap:wrap;gap:10px}
.filter-pill{
  min-height:40px;
  padding-inline:18px;
  border-radius:var(--radius-pill);
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  color:var(--muted);
  font-family:var(--font-mono);
  font-size:var(--fs-14);
  font-weight:700;
  letter-spacing:.06em;
  transition:color 180ms var(--ease),border-color 180ms var(--ease),background 180ms var(--ease);
}
.filter-pill:hover{color:var(--paper);border-color:rgba(242,160,60,.5)}
.filter-pill[aria-pressed="true"]{
  background:var(--gold-500);
  border-color:var(--gold-500);
  color:#170D02;
  box-shadow:0 8px 20px rgba(242,160,60,.22);
}
[data-filter-target].is-filtered{display:none}

.tag{
  display:inline-flex;
  align-items:center;
  min-height:24px;
  padding-inline:10px;
  border-radius:var(--radius-pill);
  border:1px solid rgba(79,195,247,.3);
  background:rgba(79,195,247,.12);
  color:var(--volt-400);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:700;
  letter-spacing:.12em;
  white-space:nowrap;
}
.tag--gold{
  border-color:rgba(242,160,60,.32);
  background:rgba(242,160,60,.14);
  color:var(--gold-300);
}
.tag--plum{border-color:rgba(255,196,107,.28);background:rgba(59,38,80,.6);color:var(--gold-300)}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.08em;
  color:var(--muted);
}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li:not(:last-child)::after{content:"/";color:var(--line)}
.breadcrumb a:hover{color:var(--gold-300)}
.breadcrumb [aria-current="page"]{color:var(--paper)}

/* ---------- 面板与主题带 ---------- */
.panel{
  background:var(--ink-800);
  border:1px solid var(--line);
  border-radius:var(--radius-md);
  padding:clamp(20px,3vw,32px);
  transition:transform 200ms var(--ease),border-color 200ms var(--ease),box-shadow 200ms var(--ease);
}
.panel:hover{
  transform:translateY(-2px);
  border-color:rgba(242,160,60,.5);
  box-shadow:0 16px 36px rgba(0,0,0,.42);
}

.band{
  position:relative;
  border-radius:var(--radius-lg);
  padding-block:clamp(36px,5.5vw,72px);
  padding-inline:clamp(20px,3.6vw,48px);
  overflow:hidden;
  border:1px solid rgba(255,255,255,.05);
}
.band--ink{background:linear-gradient(150deg,var(--ink-800),var(--ink-900))}
.band--plum{background:linear-gradient(145deg,var(--plum) 0%,#2A1A3C 78%)}
.band--wine{background:linear-gradient(145deg,var(--wine) 0%,#3A1522 78%)}

.band-track{
  display:flex;
  gap:clamp(16px,2vw,24px);
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  padding-block:6px 18px;
  scrollbar-width:thin;
  scrollbar-color:var(--line) transparent;
  -webkit-overflow-scrolling:touch;
}
.band-track > *{
  scroll-snap-align:start;
  flex:0 0 min(86%,340px);
}
.band-track:focus-visible{outline-offset:6px}

.legend{
  display:flex;
  flex-wrap:wrap;
  gap:10px 22px;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.06em;
  color:var(--muted);
}
.legend-item{display:inline-flex;align-items:center;gap:8px}
.legend-swatch{
  flex:0 0 auto;
  width:18px;
  height:8px;
  border-radius:var(--radius-pill);
  background:var(--gold-500);
}
.legend-swatch--gold{background:linear-gradient(90deg,var(--gold-700),var(--gold-300))}
.legend-swatch--volt{background:linear-gradient(90deg,var(--volt-700),var(--volt-400))}
.legend-swatch--line{background:var(--line)}

.bar{
  position:relative;
  height:10px;
  border-radius:var(--radius-pill);
  background:var(--ink-700);
  overflow:hidden;
  border:1px solid rgba(42,50,66,.8);
}
.bar-fill{
  display:block;
  height:100%;
  width:var(--bar,0%);
  border-radius:inherit;
  background:linear-gradient(90deg,var(--gold-700),var(--gold-500) 58%,var(--gold-300));
  transition:width 700ms var(--ease);
}
.bar-fill--volt{background:linear-gradient(90deg,var(--volt-700),var(--volt-400))}

/* ---------- 图片容器基础规则 ---------- */
.media-frame{
  position:relative;
  overflow:hidden;
  border-radius:var(--radius-md);
  border:1px solid var(--line);
  background:linear-gradient(140deg,var(--ink-700),var(--ink-900));
  aspect-ratio:16/10;
}
.media-frame img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform 500ms var(--ease);
}
.media-frame:hover img{transform:scale(1.03)}
.media-frame--portrait{aspect-ratio:3/4}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--square{aspect-ratio:1/1}
.media-frame--scrim::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(10,12,17,.05) 40%,rgba(10,12,17,.82));
}
.media-frame figcaption{
  position:absolute;
  left:16px;
  bottom:14px;
  z-index:2;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.08em;
  color:var(--paper);
}

/* ---------- 动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity 320ms var(--ease),transform 320ms var(--ease);
}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;
  z-index:1;
  margin-block-start:clamp(64px,10vh,140px);
  padding-block-start:clamp(48px,7vw,88px);
  background:linear-gradient(180deg,var(--ink-800) 0%,var(--ink-900) 68%);
  border-block-start:1px solid var(--line);
  color:var(--muted);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(242,160,60,.6) 28%,rgba(79,195,247,.4) 68%,transparent);
}
.footer-glow{
  position:absolute;
  top:-280px;
  right:-160px;
  width:760px;
  height:760px;
  border-radius:50%;
  pointer-events:none;
  background:radial-gradient(circle,rgba(242,160,60,.16) 0%,rgba(242,160,60,0) 62%);
}

.footer-grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:clamp(28px,4vw,52px) clamp(20px,3vw,44px);
  align-items:start;
}

.footer-mast{grid-column:span 4;display:flex;flex-direction:column;align-items:flex-start;gap:18px}
.footer-brand{display:inline-flex;align-items:center;gap:12px}
.footer-brand-text{
  font-family:var(--font-display);
  font-weight:900;
  font-size:var(--fs-18);
  letter-spacing:.01em;
  color:var(--paper);
}
.footer-signoff{
  max-width:22em;
  font-size:var(--fs-14);
  line-height:1.9;
  color:var(--muted);
}

.footer-nav{
  grid-column:span 5;
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(16px,2.4vw,28px);
}
.footer-col-title{
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  font-weight:700;
  letter-spacing:.16em;
  color:var(--gold-500);
  margin-block-end:14px;
}
.footer-links{display:grid;gap:2px}
.footer-links a{
  display:inline-block;
  padding-block:6px;
  font-size:var(--fs-14);
  color:var(--muted);
  border-block-end:1px solid transparent;
  transition:color 180ms var(--ease),border-color 180ms var(--ease);
}
.footer-links a:hover{color:var(--gold-300);border-block-end-color:rgba(242,160,60,.45)}

.footer-contact{grid-column:span 3}
.contact-list{display:grid;gap:10px}
.contact-list li{display:grid;grid-template-columns:44px minmax(0,1fr);gap:8px;align-items:start}
.contact-key{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  color:#6E7A8C;
  padding-block-start:3px;
}
.contact-val{
  font-size:var(--fs-14);
  line-height:1.65;
  color:var(--paper);
  word-break:break-word;
}

.footer-base{
  margin-block-start:clamp(40px,6vw,76px);
  padding-block:22px 30px;
  border-block-start:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px 28px;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.08em;
  color:var(--muted);
}
.footer-legal{display:flex;flex-wrap:wrap;gap:8px 20px}
.footer-legal a{color:var(--muted);transition:color 180ms var(--ease)}
.footer-legal a:hover{color:var(--gold-300)}
.footer-icp{color:var(--muted)}

/* ---------- 平板 ---------- */
@media (max-width:1180px) and (min-width:1024px){
  :root{--rail-w:76px;--rail-open:216px}
  .nav-link{width:44px;height:44px}
  .nav-list{padding-inline:16px}
  .footer-mast{grid-column:span 5}
  .footer-nav{grid-column:span 7}
  .footer-contact{grid-column:span 12}
  .contact-list{grid-template-columns:repeat(2,minmax(0,1fr))}
}

@media (max-width:1023px){
  body{
    padding-inline-start:0;
    padding-block-start:var(--header-h);
  }
  body.nav-open{overflow:hidden}

  .site-header{
    inset-block-start:0;
    inset-block-end:auto;
    inset-inline:0;
    width:100%;
    height:var(--header-h);
    background:var(--ink-800);
    border-block-end:1px solid var(--line);
  }
  .rail-progress{
    top:0;
    bottom:auto;
    left:0;
    width:100%;
    height:3px;
    transform-origin:left center;
    transform:scaleX(var(--scroll-ratio));
  }
  .rail{
    position:absolute;
    inset:0;
    flex-direction:row;
    align-items:center;
    width:100%;
    height:var(--header-h);
    padding-inline:16px;
    border-inline-end:0;
    background:transparent;
    overflow:visible;
  }
  .site-header[data-open] .rail{
    width:100%;
    background:transparent;
    box-shadow:none;
  }
  .rail-top{
    flex:1 1 auto;
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    width:100%;
    padding:0;
    border:0;
  }
  .site-header[data-open] .rail-top{align-items:center;padding-inline:0}
  .brand-words{max-width:170px;opacity:1}
  .brand-mark{width:38px;height:38px;border-radius:12px;font-size:var(--fs-18)}
  .brand-name{font-size:var(--fs-16)}
  .brand-tag{font-size:10px;letter-spacing:.12em}

  .site-nav{
    position:absolute;
    top:var(--header-h);
    left:0;
    right:0;
    flex:0 0 auto;
    max-height:calc(100vh - var(--header-h));
    padding:12px 16px 22px;
    background:var(--ink-800);
    border-block-end:1px solid var(--line);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translateY(-10px);
    transition:opacity 240ms var(--ease),transform 240ms var(--ease),visibility 240ms var(--ease);
  }
  .site-header[data-open] .site-nav{
    opacity:1;
    visibility:visible;
    pointer-events:auto;
    transform:none;
    box-shadow:var(--shadow-lift);
  }
  .nav-list{padding-inline:0;gap:2px}
  .nav-link{
    width:100%;
    height:52px;
    justify-content:flex-start;
    gap:14px;
    padding-inline:16px;
    border-radius:var(--radius-md);
  }
  .nav-label{max-width:100%;opacity:1;font-size:var(--fs-16)}
  .site-header[data-open] .nav-link[aria-current="page"]::after{opacity:1}
  .rail-foot{display:none}

  .grid-12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .col-7,.col-5,.col-6{grid-column:span 6}
  .col-12{grid-column:span 6}

  .footer-mast{grid-column:span 12}
  .footer-nav{grid-column:span 12}
  .footer-contact{grid-column:span 12}
  .contact-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-base{justify-content:flex-start}
}

/* ---------- 手机 ---------- */
@media (max-width:640px){
  :root{--header-h:58px}
  .brand-mark{width:34px;height:34px;border-radius:11px;font-size:var(--fs-16)}
  .brand-words{max-width:150px}
  .brand-name{font-size:var(--fs-14)}
  .rail-toggle{width:40px;height:40px}
  .nav-link{height:50px}
  .band{border-radius:var(--radius-md);padding-inline:18px}
  .band-track > *{flex-basis:min(90%,300px)}
  .footer-nav{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
  .contact-list{grid-template-columns:1fr}
  .footer-base{flex-direction:column;align-items:flex-start;gap:10px}
  .quote{padding-inline-start:16px;font-size:clamp(1.35rem,5.4vw,1.75rem)}
  .btn{min-height:46px;padding-inline:20px}
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none}
  .rail-progress{box-shadow:none}
}