/* ════════════════════════════════════════════
   MoonInAI — Design Tokens (复刻 sac-ai)
   Hero 头像用雷达牌，其余结构复刻 sac-ai
   ════════════════════════════════════════════ */
:root{
  --paper:#F4EFE6;
  --ink:#1A1714;
  --accent:#F0652E;
  --line:#C9C0B2;
  --muted:#7d756a;
  --ink-soft:#3a342d;

  --serif:'Playfair Display','Noto Serif SC',Georgia,serif;
  --serif-cjk:'Noto Serif SC','Playfair Display',serif;
  --sans:'Inter','Noto Sans SC',system-ui,sans-serif;
  --sans-cjk:'Noto Sans SC','Inter',sans-serif;
  --mono:ui-monospace,'SF Mono','Menlo','Roboto Mono',monospace;

  --nav-h:78px;
  --pad-x:clamp(32px,5vw,72px);
  --rail-x:48px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{margin:0;padding:0;box-sizing:border-box;}
img{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
html,body{overflow-x:hidden;}
.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;}
.menu-is-open{overflow:hidden;}
main{position:relative;z-index:2;}

html,body{background:var(--paper);}
body{
  position:relative;
  color:var(--ink);
  font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
  background-image:radial-gradient(rgba(26,23,20,.02) 1px,transparent 1px);
  background-size:3px 3px;
  overflow-wrap:anywhere;
}
body::before{
  content:"";
  position:fixed;inset:0;z-index:1;pointer-events:none;
  opacity:.045;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ═══════════ 导航 ═══════════ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:40;
  height:var(--nav-h);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 var(--pad-x);
  border-bottom:1px solid var(--line);
  background:rgba(244,239,230,.82);
  backdrop-filter:blur(8px);
}
.nav__brand{
  font-family:var(--serif);
  font-size:24px;font-weight:600;letter-spacing:-.02em;
}
.nav__links{
  display:flex;align-items:center;gap:14px;
  font-size:12px;font-weight:600;letter-spacing:.08em;
}
.nav__links a{color:var(--ink);transition:color .25s;}
.nav__links a:hover{color:var(--accent);}
.nav__links .sep{color:var(--line);font-weight:300;}
.nav__stat{
  display:inline-flex;align-items:center;gap:7px;
  margin-left:16px;color:var(--ink);letter-spacing:.02em;
}
.nav__stat i{width:5px;height:5px;border-radius:50%;background:var(--accent);animation:srow-pulse 2s infinite;}
.nav__github{
  display:inline-flex;align-items:center;justify-content:center;
  width:18px;height:18px;margin-left:4px;
  color:var(--ink);transition:color .25s var(--ease),transform .25s var(--ease);
}
.nav__github svg{width:15px;height:15px;display:block;}
.nav__github:hover{color:var(--accent);transform:translateY(-1px);}
.nav__menu-toggle,.mobile-menu{display:none;}

/* ═══════════ 左侧韵律线 + 四角准星 ═══════════ */
.rail{position:fixed;top:0;bottom:0;left:var(--rail-x);z-index:3;pointer-events:none;}
.rail i{position:absolute;top:calc(var(--nav-h) + 40px);bottom:48px;width:1px;background:var(--line);opacity:.7;}
.rail i:nth-child(1){left:0;}
.rail i:nth-child(2){left:7px;}
.rail i:nth-child(3){left:14px;}

.cross{position:fixed;z-index:3;width:18px;height:18px;pointer-events:none;opacity:.5;}
.cross::before,.cross::after{content:"";position:absolute;background:var(--line);}
.cross::before{left:8px;top:0;width:1px;height:18px;}
.cross::after{top:8px;left:0;height:1px;width:18px;}
.cross--tr{top:calc(var(--nav-h) + 22px);right:38px;}
.cross--bl{bottom:34px;left:34px;}
.cross--br{bottom:34px;right:38px;}

/* ═══════════ CTA 按钮 ═══════════ */
.btn{
  display:inline-flex;align-items:center;gap:12px;
  font-family:var(--sans-cjk);font-size:16px;font-weight:400;
  transition:all .3s var(--ease);
}
.btn .arr{transition:transform .3s var(--ease);}
.btn:hover .arr{transform:translateX(5px);}
.btn--ghost{
  padding:18px 42px;border:1px solid var(--ink);
  background:transparent;color:var(--ink);
}
.btn--ghost:hover,.btn--ghost:active{background:var(--accent);border-color:var(--accent);color:var(--paper);}
.btn--ghost:hover .arr,.btn--ghost:active .arr{color:var(--paper);}
.btn--link{
  padding:18px 42px;border:1px solid var(--ink);
  background:transparent;color:var(--ink);
}
.btn--link:hover,.btn--link:active{color:var(--accent);border-color:var(--accent);}

/* 入场前隐藏 */
[data-reveal]{opacity:0;transform:translateY(18px);}
.is-ready [data-reveal]{opacity:1;transform:none;transition:opacity .8s var(--ease),transform .8s var(--ease);}
.is-ready [data-reveal]:nth-child(2){transition-delay:.08s;}
.is-ready [data-reveal]:nth-child(3){transition-delay:.16s;}
.is-ready [data-reveal]:nth-child(4){transition-delay:.24s;}

/* ═══════════ HERO ═══════════ */
.hero{
  min-height:100vh;
  padding:0 var(--pad-x) 0 calc(var(--rail-x) + 56px);
  display:grid;
  grid-template-columns:minmax(0,44%) minmax(0,56%);
  align-items:center;
  gap:clamp(20px,3vw,40px);
  overflow:hidden;
}
.hero__left{
  display:flex;flex-direction:column;justify-content:center;
  padding:calc(var(--nav-h) + 5vh) 0 5vh;
  max-width:760px;
  position:relative;
  z-index:4;
}
.hero__lower{
  margin-top:clamp(34px,4.8vh,66px);
  margin-left:clamp(8px,1.2vw,22px);
  max-width:600px;
}
.hero__wordmark{
  font-family:var(--serif);
  font-weight:500;
  font-size:clamp(88px,10vw,160px);
  line-height:.85;
  letter-spacing:-.02em;
  white-space:nowrap;
  position:relative;
}
.hero__wordmark::after{
  content:"";
  position:absolute;
  left:0;bottom:.12em;
  width:100%;height:.06em;
  background:var(--accent);
  opacity:.85;
  transform:scaleX(0);
  transform-origin:left;
  animation:wordmark-line 1.2s var(--ease) .6s forwards;
}
@keyframes wordmark-line{to{transform:scaleX(1);}}
.hero__kicker{
  display:flex;align-items:center;gap:11px;
  font-size:clamp(16px,1.12vw,20px);letter-spacing:.05em;color:var(--accent);
  margin-bottom:28px;
}
.hero__kicker .dot{width:10px;height:10px;border-radius:50%;background:var(--accent);flex:none;}
.hero__slogan{
  font-family:var(--sans-cjk);font-weight:300;
  font-size:clamp(23px,2vw,34px);line-height:1.6;
  color:var(--ink);
  margin-bottom:32px;
}
.hero__cta{
  display:flex;align-items:stretch;gap:24px;
  width:min(100%,460px);
  flex-wrap:nowrap;
}
.hero__cta .btn{
  flex:1 1 0;
  height:58px;
  padding:0 22px;
  justify-content:center;
}

/* Hero 右栏：AI 神经核心可视化 */
.hero__right{
  display:grid;
  place-items:center;
  position:relative;
  z-index:1;
  padding:calc(var(--nav-h) + 5vh) 0 5vh;
}

.neuro{
  position:relative;
  width:min(48vw,560px);
  aspect-ratio:1;
  display:grid;
  place-items:center;
}

.neuro__canvas{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  z-index:1;
}

.neuro__svg{
  position:relative;
  width:100%;
  height:100%;
  z-index:2;
}

/* 外圈刻度环（JS 生成 60 个刻度） */
.neuro__ticks line{
  stroke:#1A1714;
  stroke-width:0.6;
  opacity:0.35;
}
.neuro__ticks line.major{
  stroke:#F0652E;
  stroke-width:1;
  opacity:0.7;
}

/* 扫描扇形旋转 */
.neuro__sweep{
  transform-origin:200px 200px;
  animation:neuro-sweep 4s linear infinite;
}
@keyframes neuro-sweep{to{transform:rotate(360deg);}}

/* 中心脉冲 */
.neuro__pulse{
  transform-origin:200px 200px;
  animation:neuro-pulse 2.4s var(--ease) infinite;
}
@keyframes neuro-pulse{
  0%{r:6;opacity:0.9;stroke-width:2;}
  100%{r:38;opacity:0;stroke-width:0.5;}
}

/* 关键词节点 */
.neuro__nodes text{
  font-family:var(--mono);
  font-size:10px;
  font-weight:600;
  letter-spacing:0.08em;
  fill:#1A1714;
}
.neuro__nodes .node-en{
  font-size:8px;
  fill:#7d756a;
  font-weight:400;
}
.neuro__nodes circle{
  fill:#F4EFE6;
  stroke:#F0652E;
  stroke-width:1.2;
  transition:transform .3s var(--ease),fill .3s;
}
.neuro__nodes g{
  cursor:pointer;
  transition:transform .4s var(--ease);
}
.neuro__nodes g:hover circle{
  fill:#F0652E;
}
.neuro__nodes g:hover text{
  fill:#F0652E;
}

/* 节点连线 */
.neuro__links line{
  stroke:#F0652E;
  stroke-width:0.6;
  opacity:0.3;
  stroke-dasharray:2 3;
}

/* HUD 角落读数 */
.neuro__hud{
  position:absolute;
  z-index:3;
  display:flex;
  flex-direction:column;
  gap:4px;
  font-family:var(--mono);
}
.neuro__hud-key{
  font-size:9px;
  letter-spacing:0.12em;
  color:var(--muted);
}
.neuro__hud-val{
  font-size:13px;
  font-weight:600;
  color:var(--ink);
  font-variant-numeric:tabular-nums;
}
.neuro__hud-val--live{
  color:var(--accent);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.neuro__hud-val--live::before{
  content:"";
  width:6px;height:6px;border-radius:50%;
  background:var(--accent);
  animation:srow-pulse 1.5s infinite;
}
.neuro__hud--tl{top:8%;left:4%;}
.neuro__hud--tr{top:8%;right:4%;text-align:right;align-items:flex-end;}
.neuro__hud--bl{bottom:8%;left:4%;}
.neuro__hud--br{bottom:8%;right:4%;text-align:right;align-items:flex-end;}

/* 顶部标签 */
.neuro__label{
  position:absolute;
  top:-8px;
  left:50%;
  transform:translateX(-50%);
  display:flex;
  align-items:center;
  gap:8px;
  padding:6px 14px;
  background:var(--paper);
  border:1px solid var(--line);
  font-family:var(--mono);
  font-size:10px;
  letter-spacing:0.14em;
  color:var(--ink-soft);
  z-index:4;
  white-space:nowrap;
}
.neuro__label-dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--accent);
  animation:srow-pulse 2s infinite;
}

/* ═══════════ ABOUT ═══════════ */
.about{
  position:relative;
  overflow:hidden;
  min-height:100vh;
  padding:calc(var(--nav-h) + 5vh) calc(var(--pad-x) + 40px) 7vh calc(var(--rail-x) + 56px);
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);
  gap:clamp(48px,5.7vw,96px);
  align-content:start;
}
.about__left,.about__right{position:relative;z-index:1;min-width:0;}
.about__right{padding-top:clamp(18px,1.5vw,24px);}

.about__title{
  font-family:var(--serif);font-weight:500;
  font-size:clamp(72px,7.2vw,126px);line-height:.92;
  margin-bottom:28px;
}
.about__bio p{
  font-family:var(--sans-cjk);font-weight:300;
  font-size:clamp(16px,1.35vw,22px);line-height:1.65;
  color:var(--ink-soft);max-width:31em;margin-bottom:12px;
}

/* 工程蓝图档案 */
.blueprint{
  position:relative;
  width:100%;
  height:clamp(330px,23vw,342px);
  margin-top:clamp(44px,4vw,58px);
  border:1px solid var(--line);
  background:
    linear-gradient(rgba(201,192,178,.14) 1px,transparent 1px) 0 0/100% 31px,
    linear-gradient(90deg,rgba(201,192,178,.14) 1px,transparent 1px) 0 0/31px 100%;
}
.bp__img{
  position:absolute;bottom:0;left:50%;
  transform:translateX(-47%);
  width:47%;height:auto;max-width:none;
  mix-blend-mode:multiply;
  filter:saturate(0) contrast(1.05);
  object-fit:cover;
}
.bp__ring{
  position:absolute;top:50%;left:53%;
  width:44%;aspect-ratio:1;transform:translate(-50%,-50%);
  border:1px solid rgba(240,101,46,.16);border-radius:50%;
}
.bp__target{
  position:absolute;width:17px;height:17px;border-radius:50%;
  border:1px solid var(--accent);
}
.bp__target::before,.bp__target::after{content:"";position:absolute;background:var(--accent);}
.bp__target::before{top:50%;left:-5px;right:-5px;height:1px;transform:translateY(-50%);}
.bp__target::after{left:50%;top:-5px;bottom:-5px;width:1px;transform:translateX(-50%);}
.bp__target--tl{top:14px;left:14px;}
.bp__target--tr{top:14px;right:14px;}
.bp__target--bl{bottom:14px;left:14px;}
.bp__target--br{bottom:14px;right:14px;}
.bp__plus{
  position:absolute;transform:translate(-50%,-50%);
  font-family:var(--mono);font-size:12px;color:var(--line);
  pointer-events:none;
}
.bp__anno{position:absolute;}
.bp__mono{
  font-family:var(--mono);font-size:7.6px;line-height:1.62;
  letter-spacing:.04em;color:var(--muted);
  white-space:nowrap;text-transform:uppercase;
}
.bp__mono--key{color:var(--ink-soft);font-weight:600;}
.bp__mono--mt{margin-top:9px;}
.bp__lead{
  display:flex;align-items:center;gap:7px;
  font-family:var(--mono);font-size:8.5px;font-weight:600;
  letter-spacing:.06em;color:var(--ink);text-transform:uppercase;
}
.bp__sq{width:5px;height:5px;background:var(--accent);display:inline-block;}
.bp__hr{display:block;width:110px;height:1px;background:var(--line);margin:7px 0;}
.bp__hatch{
  display:block;width:42px;height:12px;margin-top:6px;
  background:repeating-linear-gradient(45deg,var(--line) 0 1px,transparent 1px 4px);
}
.bp__anno--tl{top:28px;left:34px;}
.bp__anno--spec{top:32%;left:34px;}
.bp__anno--ver{bottom:58px;left:34px;}
.bp__anno--tr{top:28px;right:34px;text-align:right;}
.bp__anno--cat{top:32%;right:34px;text-align:right;}
.bp__anno--cat .bp__hatch{margin-left:auto;}
.bp__anno--focus{top:60%;right:34px;text-align:right;}
.bp__anno--est{bottom:58px;right:34px;text-align:right;}
.bp__coords{
  position:absolute;left:50%;bottom:16px;transform:translateX(-50%);
  font-family:var(--mono);font-size:8px;line-height:1.55;letter-spacing:.12em;
  color:var(--ink-soft);white-space:nowrap;
}

/* 诊 · 建 · 跑 三连圆 */
.flow{
  display:grid;
  grid-template-columns:auto minmax(44px,1fr) auto minmax(44px,1fr) auto;
  align-items:center;
  margin-bottom:clamp(48px,5vw,66px);
}
.flow__node{
  position:relative;flex:0 0 auto;
  width:clamp(92px,7.3vw,122px);aspect-ratio:1;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  border:1px solid var(--accent);border-radius:50%;
  transition:border-color .25s var(--ease),background .25s var(--ease),box-shadow .25s var(--ease);
}
.flow__node:hover{
  border-color:#D94F1F;
  background:rgba(240,101,46,.1);
  box-shadow:inset 0 0 0 1px rgba(217,79,31,.2);
}
.flow__zh{
  font-family:var(--serif-cjk);font-weight:600;
  font-size:clamp(28px,2.5vw,36px);line-height:1;color:var(--ink);
  transition:color .25s var(--ease);
}
.flow__en{
  font-family:var(--mono);font-size:10px;letter-spacing:.08em;
  color:var(--muted);
  transition:color .25s var(--ease);
}
.flow__node:hover .flow__zh{color:#D94F1F;}
.flow__node:hover .flow__en{color:var(--ink);}
.flow__link{
  height:1px;min-width:18px;
  background:var(--accent);opacity:.55;
}

/* 服务信号台 */
.signal{max-width:650px;margin-left:clamp(16px,2vw,34px);}
.signal__head{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  padding-bottom:16px;border-bottom:1px solid var(--ink);
  margin-bottom:0;
}
.signal__title{
  font-family:var(--serif-cjk);font-weight:600;
  font-size:clamp(24px,2.25vw,32px);line-height:1;
}
.signal__legend{
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--muted);
}
.signal__legend b{color:var(--accent);font-weight:600;}
.signal__list{list-style:none;margin:0;padding:0;}
.srow{border-bottom:1px solid var(--line);}
.srow > a{
  display:grid;
  grid-template-columns:clamp(42px,4vw,52px) minmax(86px,1fr) clamp(48px,5.4vw,72px) clamp(76px,7vw,112px) clamp(54px,5.5vw,74px);
  justify-content:space-between;
  align-items:center;column-gap:0;
  min-height:72px;
  padding:10px 0;
  transition:background .25s;
}
.srow > a:hover{background:rgba(240,101,46,.11);}
.srow__logo{
  width:44px;height:44px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;
}
.srow__logo--num{
  background:transparent;border:1px solid var(--accent);
}
.srow__logo--num b{
  font-family:var(--mono);font-size:13px;font-weight:600;color:var(--accent);
}
.srow__handle{
  font-family:var(--sans);font-size:clamp(14px,1.06vw,17px);color:var(--ink);
  letter-spacing:.01em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.srow__count{
  font-family:var(--mono);font-size:clamp(13px,1vw,16px);color:var(--ink);
  font-variant-numeric:tabular-nums;text-align:left;
}
.srow__bars{
  display:flex;align-items:flex-end;gap:5px;height:32px;justify-self:end;
}
.srow__bars i{width:8px;border-radius:2px;background:var(--accent);}
.srow__bars i:nth-child(1){height:32%;}
.srow__bars i:nth-child(2){height:44%;}
.srow__bars i:nth-child(3){height:56%;}
.srow__bars i:nth-child(4){height:68%;}
.srow__bars i:nth-child(5){height:80%;}
.srow__bars i:nth-child(6){height:90%;}
.srow__bars i:nth-child(7){height:100%;}
.srow__status{
  display:flex;align-items:center;gap:7px;justify-self:end;
  font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--ink);
}
.srow__dot{
  width:7px;height:7px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 0 rgba(240,101,46,.5);animation:srow-pulse 2s infinite;
}
@keyframes srow-pulse{
  0%{box-shadow:0 0 0 0 rgba(240,101,46,.45);}
  70%{box-shadow:0 0 0 6px rgba(240,101,46,0);}
  100%{box-shadow:0 0 0 0 rgba(240,101,46,0);}
}

/* ═══════════ WORK / SERVICE ═══════════ */
.work{
  min-height:100vh;
  padding:calc(var(--nav-h) + 5vh) calc(var(--pad-x) + 40px) 8vh calc(var(--rail-x) + 56px);
}
.work__title{
  font-family:var(--serif);font-weight:500;
  font-size:clamp(56px,7vw,104px);line-height:1;margin-bottom:18px;
}
.work__cats{
  display:flex;align-items:center;gap:20px;
  font-size:14px;letter-spacing:.04em;color:var(--ink);
  padding-bottom:26px;border-bottom:1px solid var(--line);margin-bottom:8px;
}
.cat--current{display:inline-flex;align-items:center;gap:8px;}
.cat__zh{font-family:var(--serif-cjk);font-weight:600;font-size:18px;}

.wrow{
  display:grid;
  grid-template-columns:58px auto minmax(40px,1fr) auto 150px 28px;
  align-items:center;gap:28px;
  padding:24px 4px;border-bottom:1px solid var(--line);
  transition:padding-left .3s var(--ease);
}
.wrow__rule{height:1px;background:var(--line);align-self:center;}
.wrow:hover{padding-left:10px;}
.wrow__idx{font-family:var(--serif);font-size:30px;color:#9a9082;}
.wrow__body{min-width:0;}
.wrow__meta{display:flex;align-items:center;gap:14px;margin-bottom:8px;flex-wrap:wrap;}
.wrow__tag{font-size:12px;letter-spacing:.05em;color:var(--muted);}
.wrow__date{font-size:12px;color:var(--line);font-variant-numeric:tabular-nums;}
.wrow__title{font-family:var(--serif-cjk);font-weight:600;font-size:23px;line-height:1.25;transition:color .25s;}
.wrow__dek{font-family:var(--sans-cjk);font-weight:300;font-size:13.5px;color:var(--muted);margin-top:7px;max-width:42em;transition:color .25s;}
.wrow:hover .wrow__idx,.wrow:hover .wrow__tag,.wrow:hover .wrow__date,
.wrow:hover .wrow__title,.wrow:hover .wrow__dek,.wrow:hover .wrow__like{color:var(--accent);}
.wrow__idx,.wrow__tag,.wrow__date,.wrow__like{transition:color .25s;}
.wrow__like{
  justify-self:end;font-size:14px;color:var(--ink-soft);
  font-variant-numeric:tabular-nums;display:inline-flex;align-items:center;gap:6px;white-space:nowrap;
}
.wrow__like .heart{color:var(--ink);transition:color .25s;}
.wrow:hover .wrow__like .heart{color:var(--accent);}
.wrow__thumb{
  width:150px;height:84px;overflow:hidden;border:1px solid var(--line);
  background:#2a2622;
  transition:transform .5s var(--ease);
}
.wrow:hover .wrow__thumb{transform:scale(1.07);}
.wrow__arr{justify-self:end;color:var(--ink);transition:transform .3s var(--ease),color .3s;}
.wrow:hover .wrow__arr{transform:translateX(5px);color:var(--accent);}
.work__all{
  display:inline-flex;align-items:center;gap:10px;
  margin-top:34px;font-size:14px;border-bottom:1px solid var(--ink);
  padding-bottom:3px;transition:color .25s,border-color .25s;
}
.work__all:hover{color:var(--accent);border-color:var(--accent);}
.work__all .arr{transition:transform .25s var(--ease);}
.work__all:hover .arr{transform:translateX(5px);}

/* ═══════════ METHOD（深色）═══════════ */
.shoot{
  background:var(--ink);
  color:var(--paper);
  min-height:100vh;
  display:flex;flex-direction:column;
}
.shoot__stage{
  flex:1;
  position:relative;
  display:flex;flex-direction:column;justify-content:space-between;
  padding:calc(var(--nav-h) + 5vh) var(--pad-x) 5vh;
  background:
    radial-gradient(ellipse at 50% 40%, rgba(240,101,46,.08), transparent 60%),
    repeating-linear-gradient(0deg,rgba(255,255,255,.02) 0 1px,transparent 1px 4px);
}
.shoot__topbar{
  display:flex;justify-content:space-between;
  font-family:var(--mono);font-size:12px;letter-spacing:.1em;
  color:var(--accent);
}
.shoot__rec{display:flex;align-items:center;gap:8px;}
.shoot__rec i{width:8px;height:8px;border-radius:50%;background:var(--accent);animation:srow-pulse 1.5s infinite;}
.shoot__copy{
  text-align:center;
  display:flex;flex-direction:column;align-items:center;gap:24px;
  padding:8vh 0;
}
.shoot__center{
  font-family:var(--serif-cjk);font-weight:600;
  font-size:clamp(32px,4.5vw,68px);line-height:1.25;
  max-width:18em;
}
.shoot__soon{
  font-family:var(--mono);font-size:clamp(13px,1.1vw,16px);letter-spacing:.1em;
  color:var(--muted);
}
.shoot__player{
  display:flex;align-items:center;gap:16px;
  font-family:var(--mono);font-size:13px;color:var(--paper);
}
.shoot__play{
  width:44px;height:44px;border:1px solid var(--paper);border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  transition:background .25s,color .25s;cursor:pointer;
}
.shoot__play:hover{background:var(--accent);border-color:var(--accent);color:var(--ink);}
.shoot__track{flex:1;height:2px;background:rgba(244,239,230,.2);position:relative;}
.shoot__track i{position:absolute;left:0;top:0;height:100%;width:0;background:var(--accent);transition:width .3s;}
.shoot__pct{color:var(--accent);}
.shoot__foot{
  padding:5vh var(--pad-x);
  border-top:1px solid rgba(244,239,230,.12);
}
.shoot__kicker{
  display:inline-block;
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--accent);
  margin-bottom:14px;
}
.shoot__title{
  font-family:var(--serif);font-weight:500;
  font-size:clamp(56px,7vw,104px);line-height:1;
}

/* ═══════════ BUILD ═══════════ */
.build{
  position:relative;
  min-height:100vh;
  padding:calc(var(--nav-h) + 5vh) var(--pad-x) 8vh calc(var(--rail-x) + 56px);
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);
  gap:clamp(40px,4vw,80px);
  align-items:center;
  overflow:hidden;
}
.build__git{
  position:absolute;top:calc(var(--nav-h) + 40px);right:var(--pad-x);
  font-family:var(--mono);font-size:11px;color:var(--muted);
  text-align:right;line-height:1.8;
}
.git__branch{color:var(--accent);font-weight:600;}
.git__line{display:block;width:1px;height:20px;background:var(--line);margin:6px 0 6px auto;}
.git__row{display:block;}
.git__row i{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--line);margin-right:8px;vertical-align:middle;}
.git__row b{color:var(--ink-soft);font-weight:600;}
.git__row em{font-style:normal;color:var(--muted);margin-left:8px;}
.git__row--head b{color:var(--accent);}
.git__row--head em{color:var(--ink);}
.git__row--ghost{opacity:.3;}

.build__left{position:relative;z-index:2;}
.build__kicker{
  display:inline-block;
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--accent);
  margin-bottom:14px;
}
.build__title{
  font-family:var(--serif);font-weight:500;
  font-size:clamp(56px,7vw,104px);line-height:1;margin-bottom:18px;
}
.build__sub{
  display:flex;align-items:center;gap:11px;
  font-family:var(--sans-cjk);font-size:18px;color:var(--ink-soft);
  margin-bottom:32px;
}
.build__sub .dot{width:10px;height:10px;border-radius:50%;background:var(--accent);flex:none;}
.build__cta{
  display:inline-flex;align-items:center;gap:12px;
  padding:16px 32px;border:1px solid var(--ink);
  font-size:15px;font-weight:500;
  transition:all .3s var(--ease);
}
.build__cta:hover{background:var(--ink);color:var(--paper);}
.build__cta .arr{transition:transform .3s var(--ease);}
.build__cta:hover .arr{transform:translateX(5px);}

.build__terminal{
  position:relative;z-index:2;
  background:#0d0c0a;
  border:1px solid var(--ink);
  border-radius:6px;
  overflow:hidden;
}
.term__bar{
  display:flex;gap:8px;padding:14px 18px;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.term__bar i{width:12px;height:12px;border-radius:50%;background:#3a342d;}
.term__bar i:nth-child(1){background:#F0652E;}
.term__bar i:nth-child(2){background:#C9C0B2;}
.term__bar i:nth-child(3){background:#3a342d;}
.term__body{padding:24px 28px;font-family:var(--mono);}
.term__code{
  font-size:clamp(13px,1.2vw,16px);line-height:1.7;color:var(--paper);
  white-space:pre-wrap;margin-bottom:24px;
}
.term__code .typed-line{display:block;opacity:0;transform:translateX(-8px);}
.term__code .typed-line.is-typed{opacity:1;transform:none;transition:opacity .3s,transform .3s;}
.term__compile{display:flex;align-items:center;gap:14px;}
.term__ver{font-size:12px;color:var(--muted);}
.term__bar2{flex:1;height:6px;background:rgba(255,255,255,.06);border-radius:3px;overflow:hidden;}
.term__bar2 i{display:block;height:100%;background:var(--accent);width:0;transition:width .3s var(--ease);}
.term__pct{font-size:13px;color:var(--accent);font-variant-numeric:tabular-nums;}

.build__plus{
  position:absolute;top:30%;left:48%;
  font-family:var(--mono);font-size:24px;color:var(--line);opacity:.4;
}
.build__measure{
  position:absolute;font-family:var(--mono);font-size:10px;color:var(--muted);
  display:flex;align-items:center;gap:8px;letter-spacing:.08em;
}
.build__measure span{width:24px;height:1px;background:var(--line);}
.build__measure b{color:var(--ink-soft);font-weight:600;}
.build__measure--area{top:20%;right:calc(var(--pad-x) + 20px);}
.build__measure--progress{bottom:18%;right:calc(var(--pad-x) + 20px);}
.build__queue{
  position:absolute;bottom:12%;left:calc(var(--rail-x) + 80px);
  font-family:var(--mono);font-size:11px;color:var(--muted);
}
.queue__label{color:var(--accent);font-weight:600;}
.queue__brace{color:var(--ink-soft);}
.build__queue ul{list-style:none;margin:4px 0 0;padding:0;}
.build__queue li{line-height:1.6;color:var(--muted);}
.build__ruler{
  position:absolute;bottom:8vh;left:calc(var(--rail-x) + 56px);right:var(--pad-x);
  display:flex;justify-content:space-between;
  font-family:var(--mono);font-size:9px;color:var(--line);
}
.build__ruler i{width:1px;height:8px;background:var(--line);margin-bottom:4px;}

/* ═══════════ CONTACT ═══════════ */
.contact{
  min-height:100vh;
  padding:calc(var(--nav-h) + 4vh) var(--pad-x) 0;
  display:flex;flex-direction:column;
}
.contact__center{text-align:center;margin:auto;padding:4vh 0;}
.contact__kicker{
  display:flex;align-items:center;justify-content:center;gap:14px;
  font-size:12px;letter-spacing:.22em;color:var(--muted);margin-bottom:26px;
}
.contact__kicker .ln{width:40px;height:1px;background:var(--line);}
.contact__title{
  position:relative;display:inline-block;
  font-family:var(--serif);font-weight:500;
  font-size:clamp(72px,10vw,150px);line-height:1;letter-spacing:-.01em;
}
.contact__underline{position:absolute;left:2%;right:2%;bottom:-2px;width:96%;height:.16em;overflow:visible;}
.contact__sub{font-family:var(--sans-cjk);font-size:clamp(17px,1.6vw,21px);color:var(--ink-soft);margin-top:30px;}
.contact__status{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;color:var(--ink-soft);margin-top:24px;
}
.contact__status .pulse{
  width:8px;height:8px;border-radius:50%;background:var(--accent);position:relative;
}
.contact__status .pulse::after{
  content:"";position:absolute;inset:0;border-radius:50%;background:var(--accent);
  animation:pulse 2s var(--ease) infinite;
}
@keyframes pulse{0%{transform:scale(1);opacity:.6}70%{transform:scale(3);opacity:0}100%{opacity:0}}

.contact__marquee{overflow:hidden;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:14px 0;-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);}
.marquee__track{display:flex;width:max-content;animation:marquee 36s linear infinite;}
.marquee__set{font-family:var(--serif-cjk);font-size:18px;color:var(--muted);letter-spacing:.06em;white-space:nowrap;flex:none;}
@keyframes marquee{to{transform:translateX(-50%)}}

.contact__bar{
  display:grid;grid-template-columns:1fr 1fr 1fr 1fr;
  border-top:1px solid var(--line);
}
.cbar__item{
  display:flex;align-items:center;gap:14px;
  padding:34px 34px;min-height:160px;
  transition:background .25s;
}
.cbar__item .cbar__val{flex:1;}
.cbar__item--mail{align-items:center;gap:14px;}
.cbar__item--mail .cbar__lbl{flex:none;}
.cbar__item--mail .cbar__arr{margin-left:auto;}
.cbar__item--wechat{flex-direction:column;align-items:center;justify-content:center;gap:8px;opacity:.7;}
.cbar__item + .cbar__item{border-left:1px solid var(--line);}
a.cbar__item:hover{background:rgba(26,23,20,.025);}
.cbar__lbl{font-size:11px;letter-spacing:.16em;color:var(--muted);}
.cbar__logo{width:22px;height:22px;}
.cbar__logo svg{width:100%;height:100%;}
.cbar__val{font-size:18px;color:var(--ink);display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.cbar__val em{font-style:normal;font-size:13px;color:var(--muted);}
.cbar__val--mail{flex:none !important;border-bottom:1px solid var(--ink);padding-bottom:3px;transition:color .25s,border-color .25s;}
a.cbar__item:hover .cbar__val--mail{color:var(--accent);border-color:var(--accent);}
.cbar__arr{color:var(--ink);transition:transform .25s var(--ease),color .25s;}
a.cbar__item:hover .cbar__arr{transform:translateX(5px);color:var(--accent);}

.qr{
  position:relative;width:96px;height:96px;margin-top:2px;
  border:1px solid var(--line);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  background-image:radial-gradient(var(--line) .8px,transparent .8px);background-size:7px 7px;
  color:var(--muted);
}
.qr__icon{width:26px;height:26px;display:flex;align-items:center;justify-content:center;}
.qr__txt{font-size:10px;letter-spacing:.08em;}
.qr__cross{position:absolute;width:12px;height:12px;}
.qr__cross::before,.qr__cross::after{content:"";position:absolute;background:var(--line);}
.qr__cross::before{left:5px;top:-3px;width:1px;height:12px;}
.qr__cross::after{top:5px;left:-3px;height:1px;width:12px;}
.qr__cross--tl{top:0;left:0;}
.qr__cross--br{bottom:0;right:0;}
.cbar__soon{font-size:10px;letter-spacing:.12em;color:var(--muted);}

.contact__foot{
  display:flex;justify-content:space-between;align-items:center;
  padding:22px 2px 26px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--muted);letter-spacing:.04em;
}
.to-top{display:inline-flex;gap:7px;transition:color .25s;}
.to-top:hover{color:var(--ink);}
.to-top .arr{transition:transform .25s var(--ease);}
.to-top:hover .arr{transform:translateY(-3px);}

/* ═══════════ 响应式 ═══════════ */
@media (max-width:860px){
  :root{--pad-x:20px;--rail-x:20px;}
  .rail,.cross{display:none;}
  .nav{height:72px;padding:0 18px;}
  .nav__brand{font-size:20px;}
  .nav__links{display:none;}
  .nav__menu-toggle{display:grid;place-items:center;width:44px;height:44px;border:0;background:transparent;color:var(--ink);cursor:pointer;}
  .nav__menu-toggle span[aria-hidden="true"]{display:block;width:21px;height:1px;background:currentColor;transition:transform .25s var(--ease);}
  .nav__menu-toggle span[aria-hidden="true"] + span[aria-hidden="true"]{margin-top:6px;}
  .mobile-menu{position:fixed;inset:0;z-index:50;padding:max(18px,env(safe-area-inset-top)) 18px max(24px,env(safe-area-inset-bottom));background:var(--paper);flex-direction:column;opacity:0;pointer-events:none;transform:translateY(-8px);transition:opacity .25s var(--ease),transform .25s var(--ease);}
  .mobile-menu[aria-hidden="false"]{display:flex;opacity:1;pointer-events:auto;transform:none;}
  .mobile-menu__head{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:14px;}
  .mobile-menu__brand{font-family:var(--serif);font-size:24px;font-weight:600;}
  .mobile-menu__close{display:grid;place-items:center;width:44px;height:44px;border:1px solid var(--ink);background:transparent;font-size:28px;line-height:1;cursor:pointer;}
  .mobile-menu__nav{display:grid;align-content:center;flex:1;}
  .mobile-menu__link{display:flex;justify-content:space-between;align-items:center;min-height:58px;border-bottom:1px solid var(--line);font-family:var(--serif);font-size:clamp(34px,11vw,54px);line-height:1;}
  .mobile-menu__link span{font-family:var(--mono);font-size:11px;color:var(--accent);}

  .hero{grid-template-columns:minmax(0,1fr);padding:calc(var(--nav-h) + 28px) var(--pad-x) 64px;gap:42px;}
  .hero__left{padding:0;}
  .hero__wordmark{font-size:clamp(80px,22vw,128px);}
  .hero__lower{margin-left:0;}
  .hero__right{order:-1;padding:0;}
  .neuro{width:min(76vw,360px);}
  .hero__cta{flex-wrap:wrap;max-width:460px;}

  .about{grid-template-columns:minmax(0,1fr);padding:calc(var(--nav-h) + 42px) var(--pad-x) 72px;gap:44px;}
  .about__right{padding-top:0;}
  .blueprint{height:auto;aspect-ratio:1.34;}
  .bp__img{width:55%;transform:translateX(-46%);}
  .flow{margin-bottom:38px;}
  .signal{max-width:none;margin-left:0;}
  .srow > a{grid-template-columns:36px minmax(0,1fr) auto;justify-content:stretch;gap:10px;}
  .srow__logo{width:36px;height:36px;}
  .srow__bars{height:18px;}
  .srow__bars,.srow__status{display:none;}

  .work{padding:calc(var(--nav-h) + 42px) var(--pad-x) 72px;}
  .wrow{grid-template-columns:42px minmax(0,1fr) 24px;gap:12px;padding:20px 0;}
  .wrow__rule,.wrow__like,.wrow__thumb{display:none;}
  .wrow__title{font-size:20px;}

  .contact{padding:calc(var(--nav-h) + 42px) var(--pad-x) 0;}
  .contact__bar{grid-template-columns:1fr;}
  .cbar__item{min-height:auto;padding:22px 0;}
  .cbar__item + .cbar__item{border-left:0;border-top:1px solid var(--line);}

  .build{grid-template-columns:minmax(0,1fr);padding:calc(var(--nav-h) + 42px) var(--pad-x) 72px;}
  .build__git,.build__measure,.build__queue,.build__ruler,.build__plus{display:none;}
  .cbar__item,.cbar__val,.build__terminal,.term__body{min-width:0;}
}

@media (max-width:600px){
  :root{--nav-h:68px;--pad-x:18px;}
  .nav{height:var(--nav-h);padding:0 max(18px,env(safe-area-inset-right)) 0 max(18px,env(safe-area-inset-left));}
  .hero{min-height:100svh;padding:calc(var(--nav-h) + env(safe-area-inset-top) + 18px) var(--pad-x) 44px;gap:28px;}
  .hero__left{padding:0;}
  .hero__lower{margin-top:28px;}
  .hero__wordmark{font-size:clamp(76px,24vw,106px);white-space:normal;overflow-wrap:anywhere;}
  .hero__kicker{font-size:13px;letter-spacing:.04em;margin-bottom:16px;}
  .hero__slogan{font-size:19px;line-height:1.55;margin-bottom:20px;}
  .hero__cta{display:grid;width:100%;max-width:none;gap:10px;}
  .hero__cta .btn{min-height:52px;height:auto;width:100%;padding:14px 12px;font-size:14px;}
  .hero__right{justify-content:center;}
  .neuro{width:min(82vw,300px);}

  .about{padding:calc(var(--nav-h) + 36px) var(--pad-x) 72px;gap:38px;}
  .about__title{font-size:clamp(56px,18vw,76px);margin-bottom:22px;}
  .about__bio p{font-size:15.5px;line-height:1.7;}
  .blueprint{max-width:100%;aspect-ratio:1.16;margin-top:34px;overflow:hidden;}
  .bp__anno--spec,.bp__anno--ver,.bp__anno--cat,.bp__anno--est,.bp__coords{display:none;}
  .flow{grid-template-columns:1fr;gap:12px;justify-items:center;}
  .flow__link{width:1px;height:20px;min-width:0;}
  .signal__head{align-items:flex-start;flex-direction:column;gap:8px;}
  .wrow__meta{gap:6px;}
  .wrow__dek{font-size:13px;overflow-wrap:anywhere;}
  .shoot__topbar{font-size:10px;}
  .shoot__copy{padding:8vh 0 6vh;}

  .contact{padding:calc(var(--nav-h) + 34px) var(--pad-x) 0;}
  .contact__center{padding:40px 0;}
  .contact__title{font-size:clamp(44px,13vw,60px);white-space:normal;}
  .contact__sub{font-size:15.5px;}
  .cbar__item{gap:10px;padding:18px 0;}
  .cbar__val{min-width:0;font-size:15px;overflow-wrap:anywhere;}
  .cbar__val--mail{overflow-wrap:anywhere;}
  .contact__foot{align-items:flex-start;flex-direction:column;gap:18px;font-size:11.5px;}

  .shoot__center{font-size:clamp(24px,7vw,40px);}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  [data-reveal]{opacity:1 !important;transform:none !important;}
}