/* ═══════════════════════════════════════════
   陈石 · 法与AI — Home Sections
   完整复刻 sac-ai.com 设计系统
   ═══════════════════════════════════════════ */

/* ─────────────── HERO ─────────────── */
.hero{
  padding:0 var(--pad-x) 48px calc(var(--rail-x) + 56px);
  display:grid;
  grid-template-columns:minmax(0,38%) minmax(0,62%);
  align-items:stretch;
  gap:0;
  overflow:hidden;
}
.hero__left{
  display:flex;flex-direction:column;justify-content:flex-start;
  padding:calc(var(--nav-h) + 5vh) 0 3vh;
  max-width:760px;
  position:relative;z-index:4;
}
.hero__lower{
  margin-top:clamp(34px,4.8vh,66px);
  margin-left:clamp(8px,1.2vw,22px);
}
.hero__wordmark{
  font-family:var(--serif);
  font-weight:500;
  font-size:clamp(160px,24vw,440px);
  line-height:.82;letter-spacing:-.04em;
  white-space:nowrap;
}
.hero__wordmark a{color:var(--paper);-webkit-text-stroke:1px rgba(26,23,20,.25);text-shadow:-1px -1px 0 rgba(255,255,255,.15),1px 1px 0 rgba(26,23,20,.2),2px 2px 3px rgba(26,23,20,.08);transition:color .3s;}
.hero__wordmark a:hover{color:var(--accent);}
  /* Debossed steel-stamp effect */
  color:var(--paper);
  -webkit-text-stroke:1px rgba(26,23,20,.25);
  text-shadow:
    -1px -1px 0 rgba(255,255,255,.15),
    1px 1px 0 rgba(26,23,20,.2),
    2px 2px 3px rgba(26,23,20,.08);
  background:none;
}
.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%,450px);
  flex-wrap:nowrap;
}
.hero__cta .btn{
  flex:1 1 0;
  height:58px;
  padding:0 22px;
  justify-content:center;
}

/* Hero right — portrait area (sac-ai.com original) */
.hero__right{display:flex;justify-content:flex-start;align-items:flex-start;}
.portrait{
  position:relative;
  flex:none;
  width:min(68vw,1240px);
  aspect-ratio:945/638;
  margin-top:calc(var(--nav-h) - 24px);
  margin-left:clamp(6px,1vw,22px);
}
.portrait__media{position:absolute;inset:0;overflow:hidden;}
.portrait__img{
  position:absolute;top:0;left:0;
  width:100%;height:auto;max-width:none;
  opacity:0;
  mix-blend-mode:multiply;
  transform-origin:50% 46%;
  transition:opacity .35s var(--ease),filter .35s var(--ease);
}
.portrait__cross{position:absolute;z-index:5;display:block;width:58px;height:58px;pointer-events:none;}
.portrait__cross::before,.portrait__cross::after{
  content:"";position:absolute;background:rgba(201,192,178,.95);opacity:1;
}
.portrait__cross--tl{top:58px;left:0;}
.portrait__cross--tl::before{
  top:0;left:-6px;width:calc(100% + 6px);height:1px;
}
.portrait__cross--tl::after{
  top:-6px;left:0;width:1px;height:calc(100% + 6px);
}
.portrait__cross--br{right:120px;bottom:-38px;}
.portrait__cross--br::before{
  top:auto;left:auto;right:-6px;bottom:0;
  width:calc(100% + 6px);height:1px;
}
.portrait__cross--br::after{
  top:auto;left:auto;right:0;bottom:-6px;
  width:1px;height:calc(100% + 6px);
}

/* Particle canvas layer — JS positions absolutely within portrait container */
.portrait__particles{
  position:absolute;pointer-events:none;z-index:2;
}
.portrait.is-particle-ready .portrait__img{
  filter:saturate(.85) contrast(1.12) brightness(.66);
  opacity:0;
}
.portrait.is-base-visible .portrait__img{
  opacity:.42;
  filter:saturate(1.22) contrast(1.18) brightness(.82);
}

/* Portrait placeholder (if no photo) */
.portrait__placeholder{
  position:absolute;inset:0;
  display:flex;align-items:center;justify-content:center;
  background:rgba(201,192,178,.15);
  font-family:var(--serif);font-size:clamp(60px,8vw,140px);
  color:rgba(201,192,178,.4);
}

/* Reveal */
[data-reveal]{opacity:0;transform:translateY(18px);}
.is-ready [data-reveal]{opacity:1;transform:none;}

/* ─────────────── ABOUT ─────────────── */
.about{
  position:relative;overflow:hidden;
  padding:calc(var(--nav-h) + 3vh) calc(var(--pad-x) + 40px) 4vh 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:600;
  font-size:clamp(72px,7.2vw,126px);line-height:.92;
  margin-bottom:28px;
}
.about__bio p{
  font-family:var(--sans-cjk);font-weight:400;
  font-size:clamp(14.5px,1.15vw,18px);line-height:1.7;
  color:var(--ink-soft);max-width:31em;margin-bottom:12px;
}

/* Blueprint profile card */
.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;top:50%;left:53%;
  transform:translate(-50%,-50%);
  width:44%;aspect-ratio:1;border-radius:50%;
  object-fit:cover;
  mix-blend-mode:multiply;
  filter:saturate(0) contrast(1.05);
}
.bp__ring{
  position:absolute;top:50%;left:53%;
  width:44%;aspect-ratio:1;transform:translate(-50%,-50%);
  border:1px solid rgba(192,57,43,.16);border-radius:50%;
  pointer-events:none;
}
/* No photo fallback */
.bp__img-placeholder{
  position:absolute;bottom:12%;left:50%;
  transform:translateX(-50%);
  width:47%;height:60%;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--serif);font-size:clamp(24px,3vw,40px);
  color:rgba(201,192,178,.3);
}

/* Blueprint crosshairs */
.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;
}

/* Blueprint annotations */
.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;
}

/* Flow nodes (写·讲·创) */
.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:#8b1a1a;
  background:rgba(192,57,43,.1);
  box-shadow:inset 0 0 0 1px rgba(139,26,26,.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:#8b1a1a;}
.flow__node:hover .flow__en{color:var(--ink);}
.flow__link{
  height:1px;min-width:18px;
  background:var(--accent);opacity:.55;
}

/* Signal station (platform links) */
.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,.srow.srow--soon{
  display:grid;
  grid-template-columns:clamp(42px,4vw,52px) minmax(86px,180px) 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(192,57,43,.11);}

.srow__logo{
  width:44px;height:44px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;
}
.srow__logo svg{width:22px;height:22px;display:block;}
.srow__logo--github{background:#24292f;}
.srow__logo--web{background:var(--accent);}
.srow__logo--wechat{background:#07C160;}
.srow__logo--bili{background:#00A1D6;}
.srow__logo--email{background:var(--ink);}
.srow__logo--rss{background:#F26522;}

.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 var(--accent-glow);animation:srow-pulse 2s infinite;
}
.srow__status--soon{color:var(--muted);}
.srow__status--soon::before{
  content:"";width:7px;height:7px;border-radius:50%;background:var(--muted);
}
.srow--soon{opacity:.5;}
.srow--soon .srow__bars i{background:transparent;border:1px solid var(--line);}

@keyframes srow-pulse{
  0%{box-shadow:0 0 0 0 var(--accent-glow);}
  70%{box-shadow:0 0 0 6px rgba(192,57,43,0);}
  100%{box-shadow:0 0 0 0 rgba(192,57,43,0);}
}

/* ─────────────── WRITING ─────────────── */
.writing{
  padding:calc(var(--nav-h) + 3vh) clamp(72px,7vw,128px) 48px;
  position:relative;
}
.writing__title{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(86px,7.8vw,132px);
  line-height:.9;letter-spacing:-.025em;
  color:var(--ink);
  margin-bottom:28px;
}

.writing__grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,480px);
  gap:72px;
  justify-content:space-between;
  align-items:start;
  max-width:1500px;
  margin:18px auto 0;
}

/* Feature article */
.feat{
  display:flex;
  flex-direction:column;
  gap:28px;
  align-items:stretch;
}
.feat__frame{
  position:relative;
  width:100%;
  background:var(--paper);
  border:1px solid var(--line);
  overflow:hidden;
}
.feat__frame img{
  display:block;
  width:100%;
  height:auto;
}
.feat__frame::before,
.feat__frame::after{
  content:"";position:absolute;z-index:3;width:20px;height:20px;pointer-events:none;
}
.feat__frame::before{
  left:-12px;top:-12px;
  border-left:1px solid var(--line);border-top:1px solid var(--line);
}
.feat__frame::after{
  right:-12px;bottom:-12px;
  border-right:1px solid var(--line);border-bottom:1px solid var(--line);
}
.feat__img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .6s var(--ease);
}
.feat:hover .feat__img{transform:scale(1.02);}

.feat__body{
  display:flex;flex-direction:column;
  padding-top:0;
  width:100%;
  max-width:100%;
  overflow-wrap:break-word;
  word-break:break-word;
}
.feat__idx{display:none;}
.feat__title{
  font-family:var(--serif-cjk);font-weight:700;
  font-size:clamp(25px,1.82vw,32px);
  line-height:1.34;color:var(--ink);
  letter-spacing:.01em;
  max-width:100%;
  overflow-wrap:break-word;
}
.feat__dek{
  font-family:var(--sans-cjk);font-weight:400;
  font-size:15px;line-height:1.85;color:var(--ink-soft);
  margin-top:24px;
  max-width:100%;
  overflow-wrap:break-word;
}
.feat__meta{
  display:flex;align-items:center;gap:12px;
  margin-top:24px;
  font-size:14px;color:var(--muted);
  font-variant-numeric:tabular-nums;
  flex-wrap:nowrap;min-width:0;
}
.feat__meta>span{flex:none;white-space:nowrap;}
.feat__tag{color:var(--ink);font-weight:500;}
.feat__views{
  margin-left:auto;display:inline-flex;align-items:center;gap:6px;
  color:var(--ink);font-variant-numeric:tabular-nums;white-space:nowrap;transition:color .25s;
}
.viewico{width:15px;height:15px;flex:none;}
.feat:hover .feat__views{color:var(--accent);}
.dotsep{width:3px;height:3px;border-radius:50%;background:var(--line);display:inline-block;flex:none;}

.feat__read{
  display:inline-flex;align-items:center;gap:10px;margin-top:38px;
  font-size:15px;color:var(--accent);
  border-bottom:1px solid var(--accent);
  padding:0 56px 8px 0;align-self:flex-start;
}
.feat__read .arr{transition:transform .25s var(--ease);}
.feat:hover .feat__read .arr{transform:translateX(5px);}

/* Article list */
.writing__list{
  position:relative;
  display:flex;flex-direction:column;
  border-left:1px solid var(--line);
  border-right:1px solid var(--line);
}
.writing__list::before{
  content:"";position:absolute;z-index:3;width:20px;height:20px;pointer-events:none;
  left:-12px;top:-12px;
  border-left:1px solid var(--line);border-top:1px solid var(--line);
}
.writing__list::after{
  content:"";position:absolute;z-index:3;width:20px;height:20px;pointer-events:none;
  right:-12px;bottom:-12px;
  border-right:1px solid var(--line);border-bottom:1px solid var(--line);
}
.wpost{
  display:grid;
  grid-template-columns:68px minmax(0,1fr) 160px;
  align-items:center;gap:16px;
  min-height:120px;
  padding:14px 20px;
  border-top:1px solid var(--line);
  transition:background .25s;
}
.wpost:first-child{border-top:1px solid var(--line);}
.writing__list .wpost:last-child{border-bottom:1px solid var(--line);}
.wpost:hover{background:rgba(192,57,43,.075);}
.wpost__idx{
  font-family:var(--serif);font-size:clamp(48px,4vw,64px);
  line-height:.8;color:#a9a39a;font-weight:400;
}
.wpost__title{
  font-family:var(--serif-cjk);font-weight:700;
  font-size:clamp(17px,1.3vw,21px);
  line-height:1.28;color:var(--ink);transition:color .25s;
}
.wpost:hover .wpost__title{color:var(--accent);}
.wpost__meta{
  display:flex;align-items:center;gap:10px;
  margin-top:12px;
  font-size:12px;color:var(--ink-soft);
  font-variant-numeric:tabular-nums;
  flex-wrap:nowrap;min-width:0;
}
.wpost__meta>span{flex:none;white-space:nowrap;}
.wpost__tag{color:var(--ink);font-weight:500;}
.wpost__views{
  margin-left:auto;display:inline-flex;align-items:center;gap:5px;
  color:var(--ink);font-variant-numeric:tabular-nums;white-space:nowrap;transition:color .25s;
}
.wpost:hover .wpost__views{color:var(--accent);}
.wpost__thumb{
  width:100%;height:100%;
  overflow:hidden;
  align-self:stretch;
  border:1px solid var(--line);
  background:#2a2622;
}
.wpost__thumb img{width:100%;height:100%;object-fit:cover;}

.writing__all{
  display:inline-flex;align-items:center;gap:14px;
  position:absolute;right:clamp(72px,7vw,128px);bottom:42px;
  font-size:15px;color:var(--muted);
  border-bottom:1px solid var(--line);padding:0 0 8px;
  transition:color .25s,border-color .25s;
}
.writing__all:hover{color:var(--accent);border-color:var(--accent);}
.writing__all .arr{transition:transform .25s var(--ease);}
.writing__all:hover .arr{transform:translateX(5px);}

/* ─────────────── SPEAK (formerly Shoot) ─────────────── */
/* Dark theme for Speak section */
body.theme-speak .nav{
  background:rgba(5,5,4,.9);
  border-bottom-color:rgba(242,238,230,.08);
  color:#f2eee6;
}
body.theme-speak .nav__brand,
body.theme-speak .nav__links a,
body.theme-speak .nav__stat{color:#f2eee6;}
body.theme-speak .nav__links .sep{color:var(--accent);}
body.theme-speak .nav__links a.is-active{color:var(--accent);}
body.theme-speak .rail i,
body.theme-speak .cross::before,
body.theme-speak .cross::after{background:rgba(242,238,230,.55);}

.speak{
  --line:rgba(242,238,230,.34);
  --muted:#a8a096;
  --ink-soft:#d8d0c4;
  background:#050504;
  color:#f2eee6;
  padding:64px 56px 48px calc(var(--rail-x) + 72px);
  display:flex;flex-direction:column;
  gap:42px;
  position:relative;
  overflow:hidden;
}
.speak::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(circle at 50% 46%,rgba(255,255,255,.06),transparent 48%);
  opacity:.7;
}
.speak__stage{
  position:relative;z-index:1;flex:1 1 auto;
  min-height:620px;overflow:hidden;
  border:1px solid var(--line);
  display:flex;flex-direction:column;justify-content:space-between;
  padding:46px 46px 36px;
}
.speak__stage::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(180deg,rgba(5,5,4,.2),rgba(5,5,4,0) 40%,rgba(5,5,4,.2));
}
.speak__topbar{
  display:flex;justify-content:space-between;align-items:center;
  font-size:16px;letter-spacing:.08em;color:#f2eee6;
  font-variant-numeric:tabular-nums;
}
.speak__rec{display:inline-flex;align-items:center;gap:16px;color:var(--accent);}
.speak__rec i{width:10px;height:10px;border-radius:50%;background:var(--accent);animation:recblink 1.6s steps(1) infinite;}
@keyframes recblink{50%{opacity:.25;}}
.speak__ep{letter-spacing:.12em;}
.speak__copy{
  position:absolute;left:50%;top:38%;transform:translateX(-50%);
  width:min(860px,72%);
  display:flex;flex-direction:column;align-items:center;gap:16px;
  text-align:center;
}
.speak__center{
  width:100%;
  font-family:var(--serif-cjk);font-weight:700;
  font-size:clamp(38px,4.1vw,68px);line-height:1.1;letter-spacing:.02em;
  color:rgba(242,238,230,.48);
  text-shadow:0 4px 18px rgba(0,0,0,.7);
  mix-blend-mode:screen;
}
.speak__soon{
  width:max-content;
  font-family:var(--serif-cjk);font-weight:600;
  font-size:clamp(17px,1.35vw,24px);
  letter-spacing:.12em;color:rgba(242,238,230,.74);
  text-shadow:0 2px 10px rgba(0,0,0,.55);
  white-space:nowrap;
}
.speak__player{
  display:flex;align-items:center;gap:26px;
  font-size:16px;color:#f2eee6;font-variant-numeric:tabular-nums;
}
.speak__play{font-size:17px;}
.speak__track{flex:1;height:1px;background:rgba(242,238,230,.42);position:relative;}
.speak__track i{position:absolute;left:0;top:-1px;width:0%;height:3px;background:var(--accent);}
.speak__pct{color:var(--accent);}

.speak__foot{
  position:relative;z-index:1;
  display:flex;align-items:flex-end;justify-content:flex-start;
  gap:120px;padding-left:0;
}
.speak__wordwrap{
  display:flex;flex-direction:column;align-items:flex-start;gap:18px;
}
.section-kicker{
  display:flex;align-items:center;gap:11px;
  font-family:var(--sans-cjk);
  font-size:17px;letter-spacing:.13em;color:var(--accent);
}
.section-kicker .dot{width:10px;height:10px;border-radius:50%;background:var(--accent);flex:none;}
.speak__title{
  font-family:var(--serif);font-weight:600;line-height:.9;
  font-size:clamp(96px,9vw,150px);
  letter-spacing:-.025em;color:#f2eee6;
}

/* ─────────────── BUILD ─────────────── */
.build{
  position:relative;
  padding:48px 52px 64px;
  overflow:hidden;
  min-height:80vh;
}
.build__left{
  position:absolute;left:clamp(104px,8.8vw,164px);top:30vh;z-index:2;
  display:flex;flex-direction:column;align-items:flex-start;
}
.build__kicker{
  font-size:17px;letter-spacing:.13em;color:var(--accent);
  margin-bottom:24px;
}
.build__title{
  font-family:var(--serif);font-weight:600;
  font-size:clamp(96px,9vw,150px);
  line-height:.9;letter-spacing:-.025em;
  color:var(--ink);
}
.build__sub{
  display:flex;align-items:center;gap:16px;
  font-family:var(--sans-cjk);font-size:19px;color:var(--accent);
  margin-top:28px;
}
.build__sub .dot{width:10px;height:10px;border-radius:50%;background:var(--accent);}
.build__cta{
  display:inline-flex;align-items:center;gap:9px;margin-top:36px;
  font-family:var(--sans-cjk);font-size:18px;color:var(--ink);
  border:0;border-bottom:1px solid var(--accent);padding:0 0 8px;
  white-space:nowrap;
  transition:all .3s var(--ease);
}
.build__cta:hover{color:var(--accent);}
.build__cta-text{white-space:nowrap;flex:none;}
.build__cta .github-mark{width:16px;height:16px;flex:0 0 16px;display:block;}
.build__cta .arr{transition:transform .25s var(--ease);}
.build__cta:hover .arr{transform:translateX(5px);}

/* Build terminal */
.build__terminal{
  position:absolute;left:47.6%;top:29vh;z-index:2;
  width:min(590px,38.5vw);
  border:1px solid rgba(26,23,20,.44);border-radius:12px;overflow:hidden;
  background:rgba(251,248,241,.72);
  box-shadow:0 24px 54px -34px rgba(26,23,20,.5);
  backdrop-filter:blur(1px);
}
.term__bar{
  display:flex;align-items:center;gap:10px;padding:16px 17px;
  border-bottom:1px solid rgba(26,23,20,.28);
  background:rgba(244,239,230,.72);
}
.term__bar > i{width:11px;height:11px;border-radius:50%;background:#a8a39a;}
.term__bar > i:nth-child(1){background:#111;}
.term__bar > i:nth-child(2){background:#62615d;}
.term__bar > i:nth-child(3){background:#aaa7a0;}
.term__body{padding:24px 30px 28px;}
.term__code{
  font-family:'SF Mono','Menlo','Roboto Mono',monospace;
  font-size:13.5px;line-height:1.58;
  color:#8b857c;white-space:pre-wrap;min-height:188px;margin:0;
}
.term__code::first-line{color:#1f1b17;font-size:18.5px;line-height:2;}
.term__code::after{
  content:"";
  display:block;width:10px;height:18px;background:var(--accent);
  margin-top:16px;
  animation:caret 1s steps(1) infinite;
}
@keyframes caret{50%{opacity:0;}}
.term__compile{
  display:flex;align-items:center;gap:18px;margin-top:16px;
}
.term__ver{
  font-family:'SF Mono','Menlo','Roboto Mono',monospace;
  font-size:13.5px;color:var(--accent);white-space:nowrap;
}
.term__ver [data-compile-label]{color:var(--accent);}
.term__bar2{
  flex:1;height:11px;border:1px solid rgba(26,23,20,.4);
  border-radius:999px;overflow:hidden;background:rgba(244,239,230,.65);
}
.term__bar2 i{display:block;height:100%;width:0;background:var(--accent);transition:width .12s linear;}
.term__pct{
  font-family:'SF Mono','Menlo','Roboto Mono',monospace;
  font-size:14px;color:var(--accent);
  font-variant-numeric:tabular-nums;min-width:46px;text-align:right;
}

/* Git log decoration */
.build__git{
  position:absolute;left:28%;top:17vh;z-index:1;
  width:300px;height:326px;
  font-family:'SF Mono','Menlo','Roboto Mono',monospace;
  font-size:12px;color:#a69f94;
}
.git__branch{position:absolute;left:0;top:0;color:#b09a8b;}
.git__line{
  position:absolute;left:8px;top:28px;bottom:0;width:1px;
  background:linear-gradient(var(--line) 0 70%,transparent);
}
.git__row{
  position:absolute;left:0;display:grid;grid-template-columns:20px 72px 1fr;
  gap:10px;align-items:center;white-space:nowrap;
}
.git__row:nth-of-type(3){top:48px;}
.git__row:nth-of-type(4){top:98px;}
.git__row:nth-of-type(5){top:148px;}
.git__row:nth-of-type(6){top:198px;}
.git__row:nth-of-type(7){top:248px;}
.git__row:nth-of-type(8){top:298px;}
.git__row i{
  width:13px;height:13px;border:1px solid #b9ada1;border-radius:50%;
  background:var(--paper);display:block;
}
.git__row b{font-weight:500;color:#77716b;}
.git__row em{font-style:normal;color:#9b948b;}
.git__row--head i{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow);}
.git__row--head b,.git__row--head em{color:var(--accent);font-weight:600;}
.git__row--ghost i{border-style:dashed;opacity:.8;}

.build__plus{
  position:absolute;left:46.8%;top:18vh;
  font-family:var(--sans);font-size:28px;color:#9b9489;font-weight:200;
}

/* Queue */
.build__queue{
  position:absolute;left:48%;top:79.6vh;z-index:1;
  font-family:'SF Mono','Menlo','Roboto Mono',monospace;
  color:#b09a8b;
}
.queue__label{display:block;font-size:11.5px;color:#bdb5aa;margin-bottom:14px;}
.queue__brace{
  position:absolute;left:0;top:42px;font-family:var(--serif);
  font-size:64px;line-height:.8;color:#c7bdb1;font-weight:300;
}
.build__queue ul{list-style:none;margin-left:48px;}
.build__queue li{
  position:relative;font-size:12px;line-height:2;
}
.build__queue li::before{
  content:"";display:inline-block;width:10px;height:10px;border:1px solid #b09a8b;
  border-radius:50%;margin-right:16px;vertical-align:middle;background:var(--paper);
}

/* Ruler */
.build__ruler{
  position:absolute;right:clamp(72px,7vw,128px);bottom:84px;z-index:1;
  width:430px;height:50px;color:#79726a;
  font-family:'SF Mono','Menlo','Roboto Mono',monospace;font-size:11.5px;
  border-top:1px solid var(--line);
}
.build__ruler::after{
  content:"";position:absolute;right:-13px;top:-9px;width:18px;height:18px;
  background:
    linear-gradient(var(--line),var(--line)) 50% 0/1px 18px no-repeat,
    linear-gradient(90deg,var(--line),var(--line)) 0 50%/18px 1px no-repeat;
}
.build__ruler i{
  position:absolute;top:-9px;width:1px;height:18px;background:var(--line);
}
.build__ruler i:nth-child(1){left:0;}
.build__ruler i:nth-child(2){left:25%;}
.build__ruler i:nth-child(3){left:50%;}
.build__ruler i:nth-child(4){left:75%;}
.build__ruler i:nth-child(5){right:0;}
.build__ruler span{position:absolute;top:24px;transform:translateX(-50%);}
.build__ruler span:nth-of-type(1){left:0;}
.build__ruler span:nth-of-type(2){left:25%;}
.build__ruler span:nth-of-type(3){left:50%;}
.build__ruler span:nth-of-type(4){left:75%;}
.build__ruler span:nth-of-type(5){left:100%;}

/* ─────────────── CONTACT ─────────────── */
.contact{
  padding:calc(var(--nav-h) + 2vh) var(--pad-x) 0;
  display:flex;flex-direction:column;
}
.contact__center{text-align:center;margin:auto;padding:4vh 0;}
.contact__kicker-wrap{
  display:flex;align-items:center;justify-content:center;gap:14px;
  font-size:12px;letter-spacing:.22em;color:var(--muted);margin-bottom:26px;
}
.contact__kicker-wrap .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__title a{
  color:inherit;transition:color .3s var(--ease);
}
.contact__title a:hover{color:var(--accent);}
.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-anim 2s var(--ease) infinite;
}
@keyframes pulse-anim{0%{transform:scale(1);opacity:.6}70%{transform:scale(3);opacity:0}100%{opacity:0}}

/* Marquee */
.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 110s 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 */
.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:.8;}
.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{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 placeholder */
.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;}
.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);}

/* Footer */
.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);}
#visitor-num{font-variant-numeric:tabular-nums;}

/* ═══════════ RESPONSIVE ═══════════ */
@media (max-width:1100px){
  .writing{
    padding:calc(var(--nav-h) + 34px) var(--pad-x) 72px calc(var(--rail-x) + 18px);
  }
  .writing__grid{grid-template-columns:1fr;gap:48px;}
  .feat{grid-template-columns:minmax(240px,380px) minmax(0,1fr);}
  .writing__all{position:static;float:none;margin-top:36px;}

  .build{
    min-height:auto;
    padding:calc(var(--nav-h) + 48px) var(--pad-x) 96px calc(var(--rail-x) + 18px);
    display:grid;grid-template-columns:1fr;gap:40px;
  }
  .build__left,.build__terminal,.build__git,.build__queue,.build__measure,.build__ruler,.build__plus{
    position:relative;left:auto;right:auto;top:auto;bottom:auto;width:auto;
  }
  .build__terminal{width:100%;}
  .build__git,.build__queue,.build__measure,.build__ruler,.build__plus{display:none;}
}

@media (max-width:1100px){
  .hero__wordmark{font-size:clamp(100px,16vw,240px);}
  .hero__slogan{font-size:clamp(18px,1.6vw,26px);}
  .hero__kicker{font-size:clamp(14px,1vw,17px);}
  .portrait{width:min(56vw,700px);}
  .hero__cta .btn{padding:14px 24px;font-size:15px;height:50px;}
}

@media (max-width:860px){
  .hero__wordmark{font-size:clamp(80px,14vw,160px);}
  .hero__slogan{font-size:clamp(16px,1.8vw,22px);}
  .portrait{width:min(52vw,460px);}
  .portrait__cross{width:42px;height:42px;}
  .portrait__cross--tl{top:28px;left:12px;}
  .portrait__cross--br{right:60px;bottom:-10px;}
}

@media (max-width:680px){
  .hero{
    grid-template-columns:1fr;
    padding:calc(var(--nav-h) + 3vh) var(--pad-x) 24px var(--pad-x);
    gap:3vh;
  }
  .hero__left{padding:0;}
  .hero__wordmark{font-size:clamp(100px,28vw,150px);}
  .hero__lower{margin-left:0;}
  .hero__right{display:none;}
  .portrait{width:min(80vw,400px);margin-left:0;}
  .portrait__cross{width:32px;height:32px;}
  .portrait__cross--tl{top:28px;left:8px;}
  .portrait__cross--br{right:36px;bottom:-8px;}

  .about{
    grid-template-columns:1fr;
    padding:calc(var(--nav-h) + 4vh) var(--pad-x) 8vh calc(var(--pad-x));
    gap:44px;
  }
  .about__right{padding-top:0;}
  .blueprint{height:auto;aspect-ratio:1.34;}
  .flow{margin-bottom:38px;}
  .signal{max-width:none;margin-left:0;}
  .srow > a,.srow.srow--soon{
    grid-template-columns:36px minmax(0,1fr) auto;
    justify-content:stretch;gap:10px;
  }
  .srow__bars,.srow__status{display:none;}

  .writing{
    padding:calc(var(--nav-h) + 34px) var(--pad-x) 72px;
  }
  .feat{grid-template-columns:1fr;}
  .feat__body{padding-top:0;}
  .wpost{grid-template-columns:74px 1fr;min-height:auto;padding:22px 18px;}
  .wpost__idx{font-size:58px;}
  .wpost__thumb{display:none;}

  .speak{padding:92px 18px 42px;gap:28px;}
  .speak__stage{min-height:58vh;padding:28px 22px 24px;}
  .speak__topbar,.speak__player{font-size:12px;gap:12px;}
  .speak__center{font-size:24px;line-height:1.4;}
  .speak__foot{padding-left:0;gap:26px;align-items:flex-start;flex-direction:column;}

  .build__title{font-size:clamp(72px,22vw,118px);}
  .build__sub{font-size:18px;}
  .build__cta{font-size:18px;}
  .term__code{font-size:12px;min-height:200px;}
  .term__code::first-line{font-size:16px;}
  .term__compile{gap:10px;flex-wrap:wrap;}
  .term__bar2{order:3;flex-basis:100%;}

  .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);}
}

@media (max-width:600px){
  .hero{
    padding:calc(var(--nav-h) + 22px) var(--pad-x) 16px;
    gap:20px;
  }
  .hero__left{padding:0;}
  .hero__lower{margin-top:28px;}
  .hero__wordmark{font-size:clamp(100px,32vw,150px);}
  .hero__kicker{font-size:14px;letter-spacing:.04em;margin-bottom:20px;}
  .hero__slogan{font-size:20px;line-height:1.55;margin-bottom:24px;}
  .hero__cta{width:100%;max-width:330px;gap:12px;}
  .hero__cta .btn{height:56px;padding:0 12px;font-size:14px;}
  .hero__right{justify-content:center;}
  .portrait{width:min(100%,330px);margin-top:0;overflow:hidden;}

  .about{
    padding:calc(var(--nav-h) + 36px) var(--pad-x) 72px;
    gap:38px;
  }
  .about__title{font-size:clamp(56px,18vw,76px);margin-bottom:22px;}
  .blueprint{
    max-width:100%;aspect-ratio:1.16;margin-top:34px;overflow:hidden;
  }
  .bp__anno--tl{left:20px;}
  .bp__anno--spec{left:20px;}
  .bp__anno--ver{left:20px;}
  .bp__anno--tr{right:20px;}
  .bp__anno--cat{right:20px;}
  .bp__anno--focus{right:20px;}
  .bp__anno--est{right:20px;}

  .flow{
    grid-template-columns:auto minmax(18px,1fr) auto minmax(18px,1fr) auto;
    margin-bottom:32px;
  }
  .flow__node{width:clamp(72px,22vw,88px);}
  .flow__zh{font-size:24px;}
  .flow__en{font-size:9px;}

  .writing{
    padding:calc(var(--nav-h) + 32px) var(--pad-x) 64px;
  }
  .writing__title{font-size:clamp(66px,21vw,96px);}
  .writing__grid{gap:38px;margin-top:28px;}
  .feat{gap:24px;}
  .feat__frame{aspect-ratio:16/13;}
  .feat__title{font-size:22px;}
  .feat__dek{font-size:14px;line-height:1.75;margin-top:18px;}
  .feat__read{margin-top:28px;}
  .feat__meta,.wpost__meta{flex-wrap:wrap;gap:8px 10px;}
  .feat__views,.wpost__views{margin-left:0;}
  .wpost{grid-template-columns:52px minmax(0,1fr);gap:12px;padding:18px 14px;}
  .wpost__idx{font-size:46px;}
  .wpost__title{font-size:18px;}

  .speak{
    min-height:100svh;
    padding:84px var(--pad-x) 40px;
    gap:26px;
  }
  .speak__stage{min-height:54vh;padding:22px 18px;}
  .speak__copy{top:39%;width:78%;}
  .speak__center{font-size:22px;}
  .speak__soon{font-size:15px;}
  .speak__title{font-size:clamp(72px,24vw,104px);}

  .build{
    padding:calc(var(--nav-h) + 42px) var(--pad-x) 72px;
    gap:32px;
  }
  .build__title{font-size:clamp(70px,22vw,100px);}
  .build__sub{font-size:16px;}
  .build__cta{font-size:16px;}
  .term__body{padding:18px;}
  .term__code{min-height:170px;font-size:11px;}
  .term__code::first-line{font-size:15px;}

  .contact{padding:calc(var(--nav-h) + 34px) var(--pad-x) 0;}
  .contact__center{padding:40px 0;}
  .contact__kicker-wrap{gap:8px;font-size:10px;}
  .contact__kicker-wrap .ln{width:24px;}
  .contact__title{font-size:clamp(50px,15vw,60px);white-space:nowrap;}
  .contact__sub{font-size:15.5px;}
  .cbar__item{gap:10px;padding:18px 0;}
  .cbar__val{min-width:0;font-size:15px;overflow-wrap:anywhere;}
  .contact__foot{gap:18px;font-size:11.5px;}
}