/* ============================================================
   CIPHER PRO — V6 "SIGNATURE"
   Premium minimal studio identity (izanami-inspired)
   Ink · Bone · Signal green — Archivo Black / Space Grotesk
   ============================================================ */

:root{
  --ink:#0f0f0e;
  --ink-2:#161614;
  --bone:#eeeae1;
  --bone-2:#e5e0d4;
  --grey:#8b877d;
  --green:#0a9d6c;
  --line-d:rgba(238,234,225,.14);
  --line-l:rgba(15,15,14,.14);
  --font-display:"Archivo Black","Cairo",sans-serif;
  --font-body:"Space Grotesk","Cairo",sans-serif;
  --font-mono:"IBM Plex Mono","Cairo",monospace;
  --pad:clamp(1.2rem,4.5vw,5rem);
  --ease:cubic-bezier(.76,0,.24,1);
}
html[dir="rtl"]{--font-display:"Cairo",sans-serif}
html[lang="zh"]{
  --font-display:"Noto Sans SC","Archivo Black",sans-serif;
  --font-body:"Noto Sans SC","Space Grotesk",sans-serif;
  --font-mono:"IBM Plex Mono","Noto Sans SC",monospace;
}
html[lang="zh"] .display{font-weight:900}
html[lang="zh"] .mono{letter-spacing:.05em;font-size:.76rem}
html[lang="zh"] .statement,html[lang="zh"] .talk-title{line-height:1.22;letter-spacing:0}
html[lang="zh"] .row-title{line-height:1.3;letter-spacing:0}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html.native{scroll-behavior:smooth}
body{
  background:var(--ink);color:var(--bone);
  font-family:var(--font-body);
  font-size:1.02rem;line-height:1.65;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
::selection{background:var(--green);color:var(--bone)}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
.display{font-family:var(--font-display);font-weight:400}
html[dir="rtl"] .display{font-weight:900}
.mono{font-family:var(--font-mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase}
html[dir="rtl"] .mono{letter-spacing:0;font-size:.78rem}
.acc{color:var(--green);font-style:normal}
.hollow{color:transparent;-webkit-text-stroke:1.5px currentColor}
.theme-bone .hollow{-webkit-text-stroke-color:var(--ink)}
.theme-ink .hollow{-webkit-text-stroke-color:var(--bone)}

/* ============ LOADER ============ */
.loader{
  position:fixed;inset:0;z-index:10000;background:var(--ink);
  display:flex;flex-direction:column;justify-content:flex-end;gap:.8rem;
  padding:var(--pad);
  transition:transform .9s var(--ease),visibility .9s;
}
.loader.done{transform:translateY(-101%);visibility:hidden}
.loader-row{display:flex;justify-content:space-between;color:var(--grey)}
.loader-row span:last-child{color:var(--bone)}
.loader-bar{height:1px;background:var(--line-d)}
.loader-bar i{display:block;height:100%;width:0;background:var(--green)}

/* ============ CURSOR (blend) ============ */
.dot{
  position:fixed;top:0;left:0;z-index:9999;pointer-events:none;
  width:10px;height:10px;border-radius:50%;background:#fff;
  mix-blend-mode:difference;transform:translate(-50%,-50%);
  display:grid;place-items:center;
  transition:width .3s var(--ease),height .3s var(--ease);
}
.dot.big{width:74px;height:74px}
.dot span{color:#000;font-size:.58rem;opacity:0;transition:opacity .2s}
.dot.big span{opacity:1}
@media(hover:none){.dot{display:none}}

/* ============ SIDE META (blend) ============ */
.side{
  position:fixed;top:50%;inset-inline-end:1.1rem;transform:translateY(-50%);z-index:950;
  display:flex;flex-direction:column;align-items:center;gap:1.4rem;
  color:#fff;mix-blend-mode:difference;pointer-events:none;
}
.side-v{writing-mode:vertical-rl;font-size:.58rem;opacity:.7}
html[dir="rtl"] .side-v{font-size:.68rem}
.side-idx{font-size:.6rem;opacity:.9}
.side-idx b{font-weight:600}
@media(max-width:900px){.side{display:none}}

/* ============ HEADER (blend) ============ */
.top{
  position:fixed;top:0;left:0;right:0;z-index:900;
  display:flex;align-items:center;justify-content:space-between;gap:1.2rem;
  padding:1.1rem var(--pad);
  color:#fff;mix-blend-mode:difference;
}
.top-brand{display:flex;align-items:center;gap:.55rem}
.top-brand .mono{font-weight:600;letter-spacing:.2em}
html[dir="rtl"] .top-brand .mono{letter-spacing:0}
.top-brand em{font-style:normal;opacity:.6}
.top-logo{width:22px;height:22px;object-fit:contain;filter:grayscale(1) brightness(10)}
.top-nav{display:flex;gap:2rem}
.top-right{display:flex;align-items:center;gap:1.4rem}
.lang{position:relative}
.lang-toggle{
  display:inline-flex;align-items:center;gap:.5rem;
  border:1px solid rgba(255,255,255,.4);padding:.34rem .8rem;
  font-family:var(--font-mono);font-size:.66rem;letter-spacing:.1em;color:#fff;
  transition:background .3s,color .3s;
}
.lang-toggle:hover,.lang.open .lang-toggle{background:#fff;color:#000}
.lang-car{font-style:normal;font-size:.5rem;transition:transform .35s var(--ease)}
.lang.open .lang-car{transform:rotate(180deg)}
.lang-menu{
  position:absolute;top:calc(100% + .55rem);inset-inline-end:0;z-index:20;
  min-width:11rem;list-style:none;
  border:1px solid rgba(255,255,255,.4);background:#000;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .35s var(--ease),transform .35s var(--ease),visibility .35s;
}
.lang.open .lang-menu{opacity:1;visibility:visible;transform:none}
.lang-menu li+li{border-top:1px solid rgba(255,255,255,.18)}
.lang-menu button{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.62rem .85rem;text-align:start;color:#fff;
  font-size:.66rem;letter-spacing:.08em;
  transition:background .25s,color .25s;
}
.lang-menu button:hover{background:#fff;color:#000}
.lang-menu button.on::after{content:"●";font-size:.5rem;color:currentColor}
.top-cta{border-bottom:1px solid #fff;padding-bottom:.2rem}
@media(max-width:900px){.top-nav{display:none}}

/* roll link (double text slides) */
.roll{position:relative;display:inline-flex;flex-direction:column;overflow:hidden;height:1.25em;line-height:1.25}
.roll span{transition:transform .45s var(--ease)}
.roll span:last-child{position:absolute;top:100%}
.roll:hover span{transform:translateY(-100%)}

/* ============ SMOOTH VIEWPORT ============ */
.viewport{position:fixed;inset:0;overflow:hidden}
html.native .viewport{position:static;overflow:visible}
.smooth{will-change:transform}
#spacer{pointer-events:none}
html.native #spacer{display:none}

/* ============ SECTION SHELL ============ */
.theme-ink{background:var(--ink);color:var(--bone)}
.theme-bone{background:var(--bone);color:var(--ink)}
.sec{padding:clamp(4.5rem,9vw,8rem) var(--pad)}
.sec-head{
  display:flex;justify-content:space-between;gap:1rem;
  padding-bottom:1rem;margin-bottom:clamp(2.4rem,5vw,4rem);
}
.theme-ink .sec-head{border-bottom:1px solid var(--line-d);color:var(--grey)}
.theme-bone .sec-head{border-bottom:1px solid var(--line-l);color:var(--grey)}

/* ============ HERO ============ */
.hero{
  min-height:100svh;display:flex;flex-direction:column;justify-content:space-between;
  padding:6.5rem var(--pad) 2rem;position:relative;
}
.hero-title{line-height:.92;letter-spacing:-.01em;user-select:none}
html[dir="rtl"] .hero-title{line-height:1.15;letter-spacing:0}
.hero-title .hl em{font-size:clamp(4rem,16.5vw,15rem)}
.hl-indent{padding-inline-start:clamp(2rem,12vw,11rem)}
.hero-title .acc{font-size:.16em;vertical-align:.45em;margin-inline-end:.25em}
.hero-title sup{font-size:.14em;vertical-align:2.4em;-webkit-text-stroke:0;color:var(--grey)}
.hero-foot{display:grid;grid-template-columns:auto 1fr auto;gap:2.5rem;align-items:end;margin-top:2rem}
.hero-tag{display:flex;gap:.8rem;color:var(--bone)}
.hero-tag i{color:var(--green)}
.hero-sub{max-width:30rem;color:var(--grey);font-size:.95rem;justify-self:center}
.hero-meta{display:flex;flex-direction:column;gap:.4rem;color:var(--grey);text-align:end}
@media(max-width:900px){
  .hero-foot{grid-template-columns:1fr;gap:1.4rem}
  .hero-meta{text-align:start}
}

/* ============ BIG LINES (masked reveal) ============ */
.hl{display:block;overflow:hidden}
.hl em{
  display:block;font-style:normal;
  transform:translateY(115%);
  transition:transform 1.1s var(--ease);
  transition-delay:var(--d,0s);
}
.in .hl em,.hl.in em{transform:none}

.statement,.talk-title{line-height:1;letter-spacing:-.01em}
html[dir="rtl"] .statement,html[dir="rtl"] .talk-title{line-height:1.3;letter-spacing:0}
.statement .hl em{font-size:clamp(1.9rem,6.2vw,5.4rem)}
.talk-title .hl em{font-size:clamp(3.4rem,13vw,11rem)}
.statement{max-width:70rem;margin-bottom:clamp(3rem,7vw,5rem)}

/* ============ PILLARS ============ */
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(1.6rem,4vw,3.5rem)}
.pillar{border-top:1px solid var(--ink);padding-top:1.2rem}
.pillar>.mono{display:block;color:var(--green);margin-bottom:.7rem}
.pillar p{color:#4c483f;font-size:.96rem}
@media(max-width:860px){.pillars{grid-template-columns:1fr}}

/* ============ ROWS / PLATFORMS ============ */
.rows{position:relative}
.row{border-top:1px solid var(--line-l)}
.row:last-of-type{border-bottom:1px solid var(--line-l)}
.row-head{
  width:100%;display:grid;grid-template-columns:auto 1fr auto;align-items:center;
  gap:clamp(1rem,4vw,3rem);padding:clamp(1.4rem,3.5vw,2.4rem) 0;
  text-align:start;
}
.row-no{color:var(--grey)}
.row-title{
  font-size:clamp(1.25rem,4.4vw,3.4rem);line-height:1.05;letter-spacing:-.01em;
  transition:transform .5s var(--ease),color .3s;
}
html[dir="rtl"] .row-title{line-height:1.4;letter-spacing:0}
.row-head:hover .row-title{transform:translateX(1.2rem)}
html[dir="rtl"] .row-head:hover .row-title{transform:translateX(-1.2rem)}
.row-plus{position:relative;width:18px;height:18px;justify-self:end}
.row-plus::before,.row-plus::after{
  content:"";position:absolute;background:currentColor;inset:auto;
  transition:transform .45s var(--ease);
}
.row-plus::before{left:0;right:0;top:8px;height:2px}
.row-plus::after{top:0;bottom:0;left:8px;width:2px}
.row.open .row-plus::after{transform:scaleY(0)}
.row-body{
  display:grid;grid-template-rows:0fr;transition:grid-template-rows .7s var(--ease);
}
.row.open .row-body{grid-template-rows:1fr}
.row-inner{overflow:hidden}
.row-inner>p{max-width:38rem;color:#4c483f;margin-bottom:1.4rem}
.row-inner ul{
  list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:.6rem 2rem;
  max-width:44rem;margin-bottom:1.6rem;
}
.row-inner li{display:flex;gap:.6rem;padding:.45rem 0;border-top:1px solid var(--line-l)}
.row-inner li::before{content:"→";color:var(--green)}
html[dir="rtl"] .row-inner li::before{content:"←"}
.row-inner{padding-bottom:0}
.row.open .row-inner{padding-bottom:clamp(1.6rem,3vw,2.6rem)}
.row-link{
  display:inline-block;color:var(--ink);border:1px solid var(--ink);
  padding:.5rem 1rem;text-decoration:none;transition:background .3s,color .3s;
}
.row-link:hover{background:var(--ink);color:var(--bone)}
@media(max-width:700px){.row-inner ul{grid-template-columns:1fr}}

/* floating preview */
.preview{
  position:absolute;top:0;left:0;z-index:5;pointer-events:none;
  width:clamp(180px,22vw,320px);aspect-ratio:4/3;overflow:hidden;
  opacity:0;transform:scale(.85) rotate(-3deg);
  transition:opacity .35s var(--ease),transform .45s var(--ease);
}
.preview.show{opacity:1;transform:scale(1) rotate(-3deg)}
.preview img{width:100%;height:100%;object-fit:cover;filter:grayscale(.3) contrast(1.05)}
@media(hover:none){.preview{display:none}}

/* ============ WHY GRID ============ */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line-d);border:1px solid var(--line-d)}
.cell{
  background:var(--ink);padding:2rem 1.6rem 2.4rem;min-height:210px;
  display:flex;flex-direction:column;gap:.7rem;position:relative;overflow:hidden;
  transition:background .4s;
}
.cell:hover{background:var(--ink-2)}
.cell::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--green);
  transform:scaleX(0);transform-origin:left;transition:transform .5s var(--ease);
}
html[dir="rtl"] .cell::after{transform-origin:right}
.cell:hover::after{transform:scaleX(1)}
.cell>.mono{color:var(--green)}
.cell h4{font-weight:600;font-size:1.05rem;color:var(--bone)}
.cell p{color:var(--grey);font-size:.92rem}
@media(max-width:900px){.grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.grid{grid-template-columns:1fr}.cell{min-height:0}}

/* marquee band */
.band{
  margin:clamp(3rem,7vw,5.5rem) calc(var(--pad) * -1) 0;
  border-top:1px solid var(--line-d);border-bottom:1px solid var(--line-d);
  overflow:hidden;white-space:nowrap;padding:.9rem 0;
}
.band-track{display:inline-block;color:var(--grey);animation:band 30s linear infinite}
html[dir="rtl"] .band-track{animation-direction:reverse}
.band-track b{color:var(--green);margin:0 1.6rem;font-weight:400}
@keyframes band{to{transform:translateX(-50%)}}

/* ============ CONTACT ============ */
.talk-title{margin-bottom:clamp(2.4rem,6vw,4.5rem)}
.talk{display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(2.4rem,6vw,5.5rem);align-items:start}
.talk-info>p{color:#4c483f;max-width:22rem;margin-bottom:2rem}
.talk-links{display:flex;flex-direction:column;gap:1rem;align-items:flex-start}
.talk-links .roll{border-bottom:1px solid var(--ink);padding-bottom:.2rem}
.talk-links>span{color:var(--grey)}
.form{display:flex;flex-direction:column;gap:1.6rem}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:1.6rem}
.f-field{display:flex;flex-direction:column;gap:.45rem}
.f-field>span{color:var(--grey)}
.f-field input,.f-field select,.f-field textarea{
  background:transparent;border:0;border-bottom:1px solid var(--line-l);
  color:var(--ink);font-family:var(--font-body);font-size:1.05rem;
  padding:.55rem .1rem;outline:none;resize:vertical;border-radius:0;
  transition:border-color .3s;
}
.f-field select{cursor:pointer}
.f-field select option{background:var(--bone)}
.f-field :is(input,select,textarea):focus{border-bottom-color:var(--green)}
.submit{
  align-self:flex-start;display:inline-flex;align-items:center;gap:.9rem;
  background:var(--ink);color:var(--bone);
  font-family:var(--font-mono);font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;
  padding:1.1rem 2.1rem;border-radius:999px;
  transition:background .35s,box-shadow .35s;
}
html[dir="rtl"] .submit{letter-spacing:0;font-size:.85rem}
.submit:hover{background:var(--green);box-shadow:0 14px 34px -14px rgba(10,157,108,.6)}
.submit i{font-style:normal}
html[dir="rtl"] .submit i{transform:scaleX(-1)}
.f-note{color:var(--green)}
@media(max-width:900px){.talk{grid-template-columns:1fr}.f-row{grid-template-columns:1fr}}

/* ============ FOOTER ============ */
.foot{padding:clamp(3rem,7vw,5rem) var(--pad) 0;overflow:hidden}
.foot-word{
  text-align:center;white-space:nowrap;user-select:none;line-height:1;
  font-size:clamp(3rem,12.5vw,12rem);letter-spacing:-.01em;
  color:transparent;-webkit-text-stroke:1px rgba(238,234,225,.3);
  transform:translateY(.08em);
}
html[dir="rtl"] .foot-word{letter-spacing:0}
.foot-word .acc{-webkit-text-stroke:0;font-size:.2em;vertical-align:2.2em}
.foot-bar{
  display:flex;justify-content:space-between;align-items:center;gap:1.2rem;flex-wrap:wrap;
  border-top:1px solid var(--line-d);padding:1.2rem 0 1.4rem;color:var(--grey);
}
.foot-bar i{font-style:normal}

/* ============ RISE REVEAL ============ */
[data-rise]{
  opacity:0;transform:translateY(30px);
  transition:opacity .9s var(--ease),transform .9s var(--ease);
  transition-delay:var(--d,0s);
}
[data-rise].in{opacity:1;transform:none}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  [data-rise],.hl em{opacity:1;transform:none}
  .loader{display:none}
  .viewport{position:static;overflow:visible}
  #spacer{display:none}
}