:root{
  --ink:#050505;
  --surface:#0b0b0c;
  --surface-2:#111113;
  --paper:#f1f1ed;
  --muted:rgba(241,241,237,.62);
  --faint:rgba(241,241,237,.36);
  --hairline:rgba(241,241,237,.14);
  --hairline-strong:rgba(241,241,237,.32);
  --display:"Bahnschrift SemiCondensed","Arial Narrow","Helvetica Neue","PingFang SC",sans-serif;
  --body:"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei UI",sans-serif;
  --mono:"Cascadia Mono","SFMono-Regular",Consolas,monospace;
  --gutter:clamp(20px,4.8vw,76px);
  --section-space:clamp(96px,11vw,176px);
  --ease:cubic-bezier(.16,1,.3,1);
}

html{scroll-padding-top:80px;background:var(--ink);color-scheme:dark;text-rendering:optimizeLegibility}
body{background:var(--ink);font-family:var(--body);font-size:16px;line-height:1.75;letter-spacing:.01em}
::selection{color:var(--ink);background:var(--paper)}
:where(a,button,video,[tabindex]):focus-visible{outline:1px solid var(--paper);outline-offset:5px}

#particle-field{position:fixed;inset:0;z-index:0;width:100%;height:100%;pointer-events:none;opacity:.72}
body>nav,body>.hero,body>.section,body>.about,body>footer,body>.lightbox{position:relative;z-index:1}
body:before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.026) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.026) 1px,transparent 1px);background-size:64px 64px;mask-image:linear-gradient(to bottom,black,transparent 88%)}

nav{height:72px;padding:0 var(--gutter);background:rgba(5,5,5,.76);border-color:transparent;transition:background .25s ease,border-color .25s ease;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px)}
nav.is-scrolled{background:rgba(5,5,5,.94);border-color:var(--hairline)}
nav .logo{font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:.17em}
nav .logo:before{content:"ZDA / ";color:var(--faint)}
nav .links{align-items:center;gap:clamp(18px,2.2vw,34px)}
nav .links a{position:relative;color:var(--muted);font-family:var(--body);font-size:12px;letter-spacing:.04em}
nav .links a:after{content:"";position:absolute;right:0;bottom:-7px;left:0;height:1px;background:var(--paper);transform:scaleX(0);transform-origin:right;transition:transform .25s var(--ease)}
nav .links a:hover:after{transform:scaleX(1);transform-origin:left}
.nav-toggle{display:none;width:44px;height:44px;border:0;color:var(--paper);background:transparent;font:400 24px/1 var(--mono);cursor:pointer}

.hero{min-height:100svh;align-items:flex-start;justify-content:flex-end;text-align:left;padding:clamp(120px,16vh,180px) var(--gutter) clamp(72px,9vh,104px);isolation:isolate}
.hero:after{content:"DYNAMIC PORTRAIT SYSTEM / 2026";position:absolute;top:104px;right:var(--gutter);color:var(--faint);font:500 10px/1 var(--mono);letter-spacing:.16em;writing-mode:vertical-rl}
.hero .kicker{margin:0 0 clamp(24px,4vh,48px);font:500 11px/1.4 var(--mono);letter-spacing:.18em;color:var(--muted)}
.hero h1{max-width:1050px;margin:0 0 34px;font-family:var(--display);font-size:clamp(64px,10.5vw,158px);font-weight:560;line-height:.79;letter-spacing:-.065em}
.hero h1 .line2{display:inline-block;color:transparent;-webkit-text-stroke:1px rgba(241,241,237,.52)}
.hero .sub{max-width:720px;margin:0 0 44px;color:var(--muted);font-size:clamp(16px,1.35vw,20px);line-height:1.85;letter-spacing:.015em}
.hero .meta{gap:0;border-top:1px solid var(--hairline)}
.hero .meta div{min-width:160px;padding:18px 42px 0 0;color:var(--faint);font:500 10px/1.5 var(--mono);letter-spacing:.12em}
.hero .meta b{display:block;margin-bottom:6px;color:var(--paper);font-family:var(--display);font-size:32px;font-weight:400;letter-spacing:-.04em}
.hero .scroll{right:var(--gutter);bottom:44px;left:auto;transform:none;font-family:var(--mono);font-size:9px;letter-spacing:.16em;animation:none}

.section{max-width:1680px;padding:var(--section-space) var(--gutter) 0}
.sec-head{display:grid;grid-template-columns:minmax(140px,.32fr) minmax(0,1fr);gap:clamp(24px,5vw,88px);margin-bottom:clamp(56px,7vw,108px);padding-top:20px;border-top:1px solid var(--hairline)}
.sec-num{grid-row:1 / span 2;margin:4px 0 0;color:var(--faint);font:500 10px/1.4 var(--mono);letter-spacing:.15em}
.sec-head h2{margin:0;font-family:var(--display);font-size:clamp(42px,6vw,86px);font-weight:520;line-height:.9;letter-spacing:-.045em}
.sec-head p{max-width:660px;margin:6px 0 0;color:var(--muted);font-size:clamp(15px,1.25vw,18px);line-height:1.8}

.flow-row h3,.stage-label,.video-sub{font:500 11px/1.4 var(--mono);letter-spacing:.12em;color:var(--muted)}
.flow-row .row5{gap:clamp(8px,1.3vw,20px)}
.flow-row .row5 img,.case-grid img,.fx-item img,.zodiac-card img,.theme-imgs img{height:auto;object-fit:contain;border-radius:0;background:#090909;border-color:var(--hairline);filter:none}
.flow-row .row5 img:hover,.case-grid img:hover,.fx-item:hover img{filter:none}
.flow-arrow{font-family:var(--mono);font-size:16px;color:var(--faint)}
.note{margin-top:36px;padding:24px 0 0;border-top:1px solid var(--hairline);border-left:0;background:transparent;border-radius:0}
.note p{max-width:920px;color:var(--muted);font-size:14px}

.method{margin:0 0 100px;padding:0;border:0;border-radius:0;background:transparent}
.method h3{margin-bottom:28px;font-family:var(--display);font-size:28px;font-weight:500}
.method .cat-row{gap:0;border-top:1px solid var(--hairline);border-bottom:1px solid var(--hairline)}
.method .cat{padding:18px;border:0;border-right:1px solid var(--hairline);border-radius:0;text-align:left;font:500 11px/1.4 var(--mono);letter-spacing:.08em}
.method .cat:last-child{border-right:0}
.method .cat.on{border-color:var(--hairline);background:var(--paper);color:var(--ink)}
.method .preview{display:grid;grid-template-columns:minmax(190px,.32fr) minmax(0,1fr);column-gap:clamp(24px,5vw,80px);padding:34px 0;margin:0;border-top:1px solid var(--hairline)}
.method .preview h4{grid-row:1 / span 5;margin:0;font-family:var(--display);font-size:20px;font-weight:500}
.method .preview p{max-width:900px;margin:0 0 14px;font-size:15px}
.method .steps{grid-column:2;gap:0;border:1px solid var(--hairline)}
.method .step{padding:18px;border:0;border-right:1px solid var(--hairline);border-radius:0}
.method .step:last-child{border-right:0}

.group-head{gap:24px;margin:120px 0 34px;padding:0 0 18px;border-color:var(--hairline)}
.group-num{font:500 10px/1 var(--mono);letter-spacing:.12em}
.group-name{font-family:var(--display);font-size:clamp(28px,3vw,42px);font-weight:500;letter-spacing:-.025em}
.case{margin-bottom:32px;padding:clamp(28px,4vw,64px);border:1px solid var(--hairline);border-radius:0;background:rgba(9,9,10,.8);transition:border-color .3s ease}
.case:hover{border-color:var(--hairline-strong)}
.case-top{justify-content:space-between;margin-bottom:30px;padding-bottom:18px;border-bottom:1px solid var(--hairline)}
.case-top h3{font-family:var(--display);font-size:clamp(30px,3.5vw,54px);font-weight:500;letter-spacing:-.035em}
.case-top .cat{border:0;border-radius:0;padding:0;color:var(--faint);font:500 10px/1.4 var(--mono);letter-spacing:.1em}
.case-theme{display:grid;grid-template-columns:100px 1fr;gap:18px;padding:0 0 28px;border:0;border-bottom:1px solid var(--hairline);border-radius:0;background:transparent}
.case-theme .theme-tag{margin:3px 0 0;padding:0;color:var(--faint);background:transparent;font:500 10px/1.4 var(--mono);letter-spacing:.12em}
.case-theme .theme-text{max-width:1000px;font-size:clamp(16px,1.5vw,21px);font-weight:500;line-height:1.65}
.info-grid{grid-template-columns:repeat(4,1fr);gap:0;margin:0!important;border-bottom:1px solid var(--hairline)}
.info-item{min-width:0;padding:20px 20px 22px 0;border:0;border-right:1px solid var(--hairline);border-radius:0;background:transparent}
.info-item+ .info-item{padding-left:20px}.info-item:last-child{border-right:0}
.info-item .k{font:500 9px/1.4 var(--mono);letter-spacing:.12em;color:var(--faint)}
.info-item .v{color:var(--muted);font-size:13px;line-height:1.75}
.case-prompt{margin:22px 0;padding:0;border:0;border-radius:0;background:transparent}
.case-prompt .pl{display:flex;justify-content:space-between;min-height:44px;align-items:center;margin:0;padding:0 14px;border:1px solid var(--hairline);color:var(--muted);font:500 10px/1 var(--mono);letter-spacing:.1em}
.case-prompt .ptext{padding:0 18px;border-right:1px solid transparent;border-bottom:1px solid transparent;border-left:1px solid transparent}
.case-prompt.open .ptext{padding-top:18px;padding-bottom:18px;border-color:var(--hairline)}
.case-prompt p{max-width:980px;color:var(--muted);font-size:13px;line-height:1.85}
.case-core{margin:26px 0 22px;color:var(--muted);font:400 12px/1.7 var(--mono)}
.case-grid,.fx-grid{column-gap:12px}.case-grid img{margin-bottom:12px}.fx-item{margin-bottom:12px;border-radius:0}
.fx-item .lbl{padding:34px 12px 10px;font:500 9px/1.3 var(--mono);letter-spacing:.07em}

.video-block{margin-top:72px;padding-top:20px;border-top:1px solid var(--hairline)}
.video-grid,.video-grid-h,.video-grid-v,.video-grid-s{gap:12px}
.video-item{position:relative;border-color:var(--hairline);border-radius:0;background:#000}
.video-item video{width:100%;height:auto;object-fit:contain;background:#000}
.video-caption{text-align:left;color:var(--muted);font:500 10px/1.5 var(--mono);letter-spacing:.04em;padding:12px 0}
.video-sound{position:absolute;top:10px;right:10px;z-index:2;padding:7px 9px;border:1px solid rgba(255,255,255,.32);color:#fff;background:rgba(0,0,0,.64);font:500 9px/1 var(--mono);letter-spacing:.08em;pointer-events:none}

.zodiac-grid,.theme-grid{gap:12px}.zodiac-card,.theme-card{border-radius:0;border-color:var(--hairline);background:var(--surface)}
.zodiac-info{padding:14px 2px 24px}.zodiac-name{font-family:var(--display);font-weight:500}.zodiac-desc{color:var(--muted)}
.theme-imgs{gap:1px;padding:0}.theme-imgs img{border:0;border-radius:0}.theme-name{text-align:left;padding:12px 2px 20px;color:var(--muted);font:500 10px/1.4 var(--mono);letter-spacing:.06em}

.about{max-width:none;margin-top:var(--section-space);padding:var(--section-space) var(--gutter);border-color:var(--hairline);background:var(--paper);color:var(--ink)}
.about-inner{max-width:1680px}.about .sec-head{border-color:rgba(5,5,5,.18)}
.about .sec-num,.about .sec-head p{color:rgba(5,5,5,.58)}
.about-grid{grid-template-columns:repeat(4,1fr);gap:0;margin-top:70px;border-top:1px solid rgba(5,5,5,.22)}
.about-card{padding:24px 28px 0 0;border-right:1px solid rgba(5,5,5,.18)}
.about-card+ .about-card{padding-left:28px}.about-card:last-child{border-right:0}
.about-card h4{font-family:var(--display);font-size:18px;font-weight:500;color:var(--ink)}
.about-card p,.about-card li{color:rgba(5,5,5,.66)}
.about-card b{color:var(--ink)!important}
footer{padding:32px var(--gutter);border-top:1px solid var(--hairline);text-align:left;color:var(--faint);font:500 9px/1.4 var(--mono);letter-spacing:.1em}

.lightbox{padding:32px;background:rgba(0,0,0,.97);cursor:zoom-out;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}
.lightbox img{max-width:96vw;max-height:92vh;width:auto;height:auto;object-fit:contain;border-radius:0;box-shadow:0 30px 100px rgba(0,0,0,.6)}

@media(max-width:1000px){
  .case-grid,.fx-grid{column-count:3}.theme-grid{grid-template-columns:repeat(3,1fr)}
  .info-grid{grid-template-columns:repeat(2,1fr)}
  .video-grid-v{grid-template-columns:repeat(3,1fr)}
  .about-grid{grid-template-columns:repeat(2,1fr)}
  .about-card:nth-child(2){border-right:0}.about-card:nth-child(n+3){margin-top:32px;border-top:1px solid rgba(5,5,5,.18)}
}

@media(max-width:720px){
  nav{height:64px}.nav-toggle{display:block}
  nav .links{position:fixed;top:64px;right:0;left:0;display:none;flex-direction:column;align-items:flex-start;gap:0;padding:18px 20px 28px;border-bottom:1px solid var(--hairline);background:rgba(5,5,5,.98)}
  nav.menu-open .links{display:flex}nav .links a{width:100%;padding:14px 0;font-size:16px}
  .hero{min-height:820px;padding-top:110px;padding-bottom:54px}.hero:after{display:none}
  .hero h1{font-size:clamp(56px,19vw,86px);line-height:.82}.hero .sub{font-size:16px;line-height:1.75}
  .hero .meta{width:100%;display:grid;grid-template-columns:repeat(3,1fr)}.hero .meta div{min-width:0;padding-right:10px}.hero .scroll{display:none}
  .sec-head{grid-template-columns:1fr;gap:14px}.sec-num{grid-row:auto}.sec-head h2{font-size:48px}.sec-head p{margin-top:4px}
  .method .preview{grid-template-columns:1fr;gap:20px}.method .preview h4{grid-row:auto}.method .steps{grid-column:1;grid-template-columns:1fr 1fr}
  .case{padding:24px 18px}.case-theme{grid-template-columns:1fr;gap:8px}.info-grid{grid-template-columns:1fr}.info-item,.info-item+ .info-item{padding:16px 0;border-right:0;border-bottom:1px solid var(--hairline)}
  .case-grid,.fx-grid{column-count:2}.zodiac-grid,.theme-grid{grid-template-columns:repeat(2,1fr)}
  .video-grid,.video-grid-h,.video-grid-s{grid-template-columns:1fr}.video-grid-v{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr}.about-card,.about-card+ .about-card{padding:22px 0;border-right:0;border-top:1px solid rgba(5,5,5,.18);margin:0!important}
}

@media(max-width:420px){.case-grid,.fx-grid{column-count:1}.zodiac-grid,.theme-grid,.video-grid-v{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}#particle-field{display:none}}

/* Revision 02 — persistent orientation and a single typographic axis */
body>nav{
  position:fixed;
  top:0;
  right:0;
  left:0;
  z-index:100;
}
nav .links a.is-active{color:var(--paper)}
nav .links a.is-active:after{transform:scaleX(1);transform-origin:left}

.section,.about-inner{margin-right:auto;margin-left:auto}
.sec-head{
  display:block;
  max-width:none;
  margin-bottom:clamp(52px,6vw,88px);
  padding-top:22px;
  text-align:left;
}
.sec-num{
  display:block;
  margin:0 0 18px;
  font-family:var(--mono);
}
.sec-head h2{
  max-width:1080px;
  margin:0 0 20px;
  font-family:var(--display);
  text-align:left;
}
.sec-head p{
  max-width:760px;
  margin:0;
  font-family:var(--body);
  text-align:left;
}

.method{border-top:1px solid var(--hairline);padding-top:28px}
.method h3{
  max-width:760px;
  margin:0 0 34px;
  font-family:var(--display);
  font-size:clamp(32px,3.2vw,48px);
  font-weight:520;
  line-height:1.05;
  letter-spacing:-.03em;
}
.method .cat-row{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  margin:0 0 56px;
}
.method .cat{
  min-height:88px;
  padding:22px 20px;
  font-family:var(--body);
  font-size:clamp(15px,1.2vw,18px);
  font-weight:500;
  line-height:1.35;
  letter-spacing:0;
}
.method .preview{
  grid-template-columns:minmax(240px,.38fr) minmax(0,1fr);
  padding:42px 0;
}
.method .preview h4{
  max-width:220px;
  font-family:var(--display);
  font-size:clamp(25px,2.2vw,34px);
  font-weight:520;
  line-height:1.15;
  letter-spacing:-.02em;
}
.method .preview p{font-family:var(--body);font-size:16px;line-height:1.8}
.method .step,.method .step b{font-family:var(--body)}
.method .step b{font-size:15px}.method .step{font-size:14px}

.flow-row h3,.stage-label,.video-sub,.group-num,.case-top .cat,
.info-item .k,.case-prompt .pl,.case-core,.fx-item .lbl,.theme-name,
.video-caption,.sec-num{font-family:var(--mono)}
.group-name,.case-top h3,.case-theme .theme-text,.zodiac-name,
.about-card h4{font-family:var(--display)}
.note p,.info-item .v,.case-prompt p,.zodiac-desc,
.about-card p,.about-card li{font-family:var(--body)}

.about{
  background:var(--ink);
  color:var(--paper);
  border-color:var(--hairline);
}
.about .sec-head{border-color:var(--hairline)}
.about .sec-num,.about .sec-head p{color:var(--muted)}
.about-grid{border-color:var(--hairline)}
.about-card,.about-card+ .about-card{border-color:var(--hairline)}
.about-card h4,.about-card b{color:var(--paper)!important}
.about-card p,.about-card li{color:var(--muted)}
.video-sound{display:none!important}

@media(max-width:720px){
  .method .cat-row{grid-template-columns:1fr;margin-bottom:42px}
  .method .cat{min-height:0;border-right:0;border-bottom:1px solid var(--hairline)}
  .method .cat:last-child{border-bottom:0}
  .method .preview{grid-template-columns:1fr}
  .method .preview h4{max-width:360px}
}

/* Compact screens keep chapter links exposed instead of hiding them in a menu. */
@media(max-width:720px){
  html{scroll-padding-top:108px}
  body>nav{
    height:102px;
    padding:0 20px;
    align-items:flex-start;
  }
  nav .logo{height:48px;display:flex;align-items:center}
  .nav-toggle{display:none!important}
  nav .links,
  nav.menu-open .links{
    position:absolute;
    top:48px;
    right:0;
    left:0;
    display:flex;
    flex-direction:row;
    align-items:center;
    gap:24px;
    height:54px;
    padding:0 20px;
    overflow-x:auto;
    border-top:1px solid var(--hairline);
    border-bottom:1px solid var(--hairline);
    background:rgba(5,5,5,.96);
    scrollbar-width:none;
    white-space:nowrap;
  }
  nav .links::-webkit-scrollbar{display:none}
  nav .links a{width:auto;flex:0 0 auto;padding:0;font-size:12px}
  nav .links a:after{bottom:-10px}
  .hero{padding-top:142px}
}

/* Revision 03 — the title, rather than the page background, owns the particles. */
#particle-field{display:none!important}
#title-particles{
  position:absolute;
  inset:0;
  z-index:1;
  width:100%;
  height:100%;
  pointer-events:none;
}
.hero{
  justify-content:flex-start;
  padding-top:clamp(142px,16vh,184px);
}
.hero>*:not(#title-particles){position:relative;z-index:2}
.hero h1{
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  max-width:1180px;
  margin-bottom:42px;
  overflow:visible;
  color:var(--paper);
  line-height:.86;
}
.hero h1 .line1,.hero h1 .line2{display:block;white-space:nowrap}
.hero h1 .line2{
  margin-top:.18em;
  color:var(--paper);
  -webkit-text-stroke:0;
}
.hero h1 .ai-word{
  display:inline-block;
  font-size:1.08em;
  line-height:.74;
  vertical-align:.02em;
  letter-spacing:-.075em;
}
@media(max-width:720px){
  .hero{padding-top:138px}
  .hero h1{font-size:clamp(52px,16vw,78px);line-height:.88;margin-bottom:34px}
  .hero h1 .line1,.hero h1 .line2{white-space:normal}
  .hero h1 .line2{margin-top:.22em}
}
@media(prefers-reduced-motion:reduce){#title-particles{display:none}}

/* Revision 04 — method as an editorial framework */
.method-body{min-width:0}
.topic-box{
  margin:0 0 30px;
  padding:22px 24px 24px;
  border:1px solid var(--hairline-strong);
  background:rgba(255,255,255,.025);
}
.topic-label{
  display:block;
  margin-bottom:18px;
  color:var(--faint);
  font:500 10px/1.4 var(--mono);
  letter-spacing:.12em;
}
.topic-box>p{max-width:780px;margin:0!important;color:var(--paper)!important;font-size:17px!important}
.topic-list{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.topic-list>div{padding:0 22px;border-right:1px solid var(--hairline)}
.topic-list>div:first-child{padding-left:0}.topic-list>div:last-child{padding-right:0;border-right:0}
.topic-list b{display:block;margin-bottom:9px;color:var(--paper);font-size:17px;font-weight:550}
.topic-list span{display:block;color:var(--muted);font-size:14px;line-height:1.75}
.method-points{list-style:none;counter-reset:method-point;margin:0;padding:0}
.method-points li{
  counter-increment:method-point;
  display:grid;
  grid-template-columns:56px minmax(190px,.36fr) minmax(0,1fr);
  gap:22px;
  padding:24px 0;
  border-top:1px solid var(--hairline);
}
.method-points li:before{
  content:"0" counter(method-point);
  color:var(--faint);
  font:500 11px/1.5 var(--mono);
  letter-spacing:.1em;
}
.method-points b{color:var(--paper);font-size:18px;font-weight:550;line-height:1.45}
.method-points p{margin:0!important;color:var(--muted)!important;font-size:15px!important;line-height:1.85!important}
.tool-line{display:flex;align-items:center;gap:10px;margin-top:28px;padding-top:18px;border-top:1px solid var(--hairline)}
.tool-line span{margin-right:12px;color:var(--faint);font:500 10px/1.4 var(--mono);letter-spacing:.12em}
.tool-line b{padding:7px 11px;border:1px solid var(--hairline-strong);color:var(--paper);font:500 11px/1 var(--mono);letter-spacing:.04em}

/* Quiet spatial depth around the hero. */
.hero:before{
  content:"";
  position:absolute;
  z-index:0;
  top:18%;
  right:10%;
  width:min(36vw,520px);
  aspect-ratio:1;
  border:1px solid rgba(241,241,237,.08);
  border-radius:50%;
  box-shadow:0 0 100px rgba(241,241,237,.025),inset 0 0 80px rgba(241,241,237,.018);
  animation:orbit-drift 18s ease-in-out infinite alternate;
}
@keyframes orbit-drift{to{transform:translate3d(-22px,18px,0) scale(1.04);opacity:.55}}
.system-tag{
  position:absolute;
  z-index:3;
  color:rgba(241,241,237,.38);
  font:500 9px/1.45 var(--mono);
  letter-spacing:.12em;
  pointer-events:none;
}
.system-tag:before{content:"";display:inline-block;width:5px;height:5px;margin-right:8px;border:1px solid currentColor;border-radius:50%}
.system-tag.tag-a{right:var(--gutter);top:28%}
.system-tag.tag-b{right:12%;bottom:18%}
.system-tag.tag-c{left:var(--gutter);bottom:35px}
.sound-toggle{
  margin-top:28px;
  padding:9px 12px;
  border:1px solid var(--hairline);
  color:var(--muted);
  background:rgba(5,5,5,.54);
  font:500 10px/1 var(--mono);
  letter-spacing:.08em;
  cursor:pointer;
  transition:color .3s ease,border-color .3s ease,background .3s ease;
}
.sound-toggle:hover,.sound-toggle[aria-pressed="true"]{color:var(--paper);border-color:var(--hairline-strong)}
.sound-dot{display:inline-block;width:5px;height:5px;margin-right:9px;border-radius:50%;background:currentColor}
.sound-toggle[aria-pressed="true"] .sound-dot{animation:sound-breathe 2.8s ease-in-out infinite}
@keyframes sound-breathe{50%{opacity:.25;transform:scale(.65)}}

/* Once the particle mask is ready, typography remains as a faint accessibility ghost. */
.hero.particle-ready h1{color:var(--paper)}
.hero.particle-ready h1 .line2{color:var(--paper)}

@media(max-width:900px){
  .method-points li{grid-template-columns:42px 1fr}
  .method-points p{grid-column:2}
  .topic-list{grid-template-columns:1fr}
  .topic-list>div,.topic-list>div:first-child,.topic-list>div:last-child{padding:16px 0;border-right:0;border-bottom:1px solid var(--hairline)}
  .topic-list>div:last-child{border-bottom:0}
}
@media(max-width:720px){
  .system-tag.tag-a,.system-tag.tag-b{display:none}
  .system-tag.tag-c{bottom:16px}
  .method-points li{grid-template-columns:34px 1fr;gap:12px}
  .tool-line{flex-wrap:wrap}
}
@media(prefers-reduced-motion:reduce){
  .hero:before,.sound-dot{animation:none!important}
  .hero.particle-ready h1,.hero.particle-ready h1 .line2{color:var(--paper)}
}

/* Cleanup — remove GPT decorative labels and sound toggle */
.hero:after{display:none!important}
.system-tag{display:none!important}
.sound-toggle{display:none!important}

/* JSON 工作流板块 */
.wf-grid{display:grid;grid-template-columns:1fr;gap:20px}
.wf-card{border:1px solid var(--hairline);background:rgba(9,9,10,.6)}
.wf-head{display:flex;align-items:center;gap:16px;padding:18px 22px;border-bottom:1px solid var(--hairline);flex-wrap:wrap}
.wf-num{font-family:var(--mono);font-size:11px;color:var(--faint);letter-spacing:.1em}
.wf-name{font-family:var(--display);font-size:20px;font-weight:500;letter-spacing:.02em}
.wf-case{font-family:var(--mono);font-size:10px;color:var(--faint);letter-spacing:.08em;margin-left:auto}
.wf-tag{font-family:var(--mono);font-size:10px;color:var(--muted);border:1px solid var(--hairline-strong);padding:5px 10px;letter-spacing:.04em}
.wf-body{display:grid;grid-template-columns:minmax(300px,.85fr) minmax(0,1.15fr)}
.wf-col{padding:22px}
.wf-col+.wf-col{border-left:1px solid var(--hairline)}
.wf-label{font-family:var(--mono);font-size:10px;color:var(--faint);letter-spacing:.12em;margin-bottom:14px}
.wf-json{font-family:var(--mono);font-size:12px;line-height:1.75;color:var(--muted);background:rgba(255,255,255,.02);border:1px solid var(--hairline);padding:16px 18px;white-space:pre;overflow-x:auto;border-radius:4px;margin:0}
.wf-refs{display:flex;gap:8px;flex-wrap:wrap}
.wf-refs img{width:60px;height:80px;object-fit:cover;border:1px solid var(--hairline);background:#000}
.wf-prompt{font-size:13px;line-height:1.85;color:var(--muted);white-space:pre-line}
@media(max-width:720px){
  .wf-body{grid-template-columns:1fr}
  .wf-col+.wf-col{border-left:0;border-top:1px solid var(--hairline)}
}

/* 修复：懒加载 JS 已移除，图片直接显示 */
.flow-row .row5 img,.case-grid img,.fx-item img,.zodiac-card img,.theme-imgs img{opacity:1!important;transform:none!important}

.wf-empty{color:var(--faint);font-family:var(--mono);font-size:11px;letter-spacing:.08em;padding:10px 0}