/* =========================================================
   MotionChart — 论文级动态图表  |  Publication site styles
   Light academic theme built on the brand palette:
   navy ink · cream paper · gold→teal→blue gradient
   ========================================================= */

:root{
  /* paper & ink */
  --paper:      #FBFAF7;
  --paper-2:    #F3F0E9;
  --paper-3:    #ECE8DF;
  --card:       #FFFFFF;
  --ink:        #14263C;
  --ink-2:      #33465C;
  --ink-3:      #4C5E73;
  --muted:      #6C7C90;
  --line:       #E6E1D6;
  --line-2:     #D8D2C4;

  /* brand accents (from the M logo) */
  --gold:       #E0A93A;
  --gold-deep:  #C8912A;
  --teal:       #6E9F8E;
  --blue:       #6FA8D0;
  --orange:     #E8772E;
  --accent:     #2E6F8E;
  --accent-ink: #1F4E66;
  --grad:       linear-gradient(102deg,#E0A93A 0%,#6E9F8E 52%,#6FA8D0 100%);
  --grad-soft:  linear-gradient(102deg,rgba(224,169,58,.14) 0%,rgba(110,159,142,.14) 52%,rgba(111,168,208,.16) 100%);

  /* type */
  --sans: "Inter","Segoe UI","Microsoft YaHei","PingFang SC","Hiragino Sans GB","Noto Sans SC",system-ui,-apple-system,sans-serif;
  --serif:"Source Han Serif SC","Noto Serif SC","Songti SC","STSong",Georgia,"Times New Roman",serif;
  --mono: "JetBrains Mono","Cascadia Code",Consolas,"SFMono-Regular",Menlo,monospace;

  /* shape & shadow */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --shadow-sm: 0 1px 2px rgba(20,38,60,.05),0 2px 8px rgba(20,38,60,.04);
  --shadow-md: 0 6px 24px -8px rgba(20,38,60,.14),0 2px 6px rgba(20,38,60,.05);
  --shadow-lg: 0 24px 60px -24px rgba(20,38,60,.28),0 8px 24px -12px rgba(20,38,60,.14);
  --maxw: 1180px;
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--sans);
  color:var(--ink-2);
  background:var(--paper);
  line-height:1.7;
  font-size:16.5px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--accent);text-decoration:none;transition:color .18s ease}
a:hover{color:var(--accent-ink)}
h1,h2,h3,h4{margin:0;color:var(--ink);line-height:1.2;letter-spacing:-.01em;font-weight:700}
p{margin:0}
ul{margin:0;padding:0}
button{font-family:inherit}
::selection{background:rgba(110,159,142,.28)}

/* ---------- bilingual toggle ---------- */
html[data-lang="zh"] .en{display:none !important}
html[data-lang="en"] .zh{display:none !important}

/* ---------- layout ---------- */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 28px}
.section{padding:112px 0}
.section--tight{padding:76px 0}
.section--paper2{background:var(--paper-2)}
.section--paper3{background:var(--paper-3)}

/* prevent min-content blowout of grid / flex children on narrow screens */
.grid > *,.split > *,.quick > *,.hero__grid > *,.docs-layout > *,.feat__item > *,.step > *{min-width:0}
.steps,.step__body,.feat__body,.docs-body,.docs-nav,.hero__copy,.hero__visual,.codecard{min-width:0}
.codecard pre{max-width:100%}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);margin-bottom:18px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--grad)}
h2.h-sec{font-size:clamp(28px,3.4vw,42px);margin-bottom:16px}
.lead{font-size:clamp(16px,1.5vw,18.5px);color:var(--ink-3);max-width:720px}
.center{text-align:center}
.center .lead{margin-left:auto;margin-right:auto}
.center .eyebrow{justify-content:center}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}

/* section head block */
.sec-head{margin-bottom:52px}
.sec-head .lead{margin-top:2px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 24px;border-radius:999px;font-weight:650;font-size:15px;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;
  transition:transform .16s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.btn svg{width:17px;height:17px;flex:none}
.btn--primary{background:var(--ink);color:#fff;box-shadow:0 8px 20px -10px rgba(20,38,60,.55)}
.btn--primary:hover{background:#0d1a2b;color:#fff;transform:translateY(-1px);box-shadow:0 14px 28px -12px rgba(20,38,60,.6)}
.btn--grad{background:var(--grad);color:#14263C;box-shadow:0 10px 24px -12px rgba(224,169,58,.7)}
.btn--grad:hover{transform:translateY(-1px);color:#14263C;box-shadow:0 16px 30px -14px rgba(110,159,142,.7)}
.btn--ghost{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn--ghost:hover{background:#fff;border-color:var(--ink-3);color:var(--ink);transform:translateY(-1px)}
.btn--sm{padding:9px 16px;font-size:13.5px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(251,250,247,.82);
  backdrop-filter:saturate(160%) blur(14px);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease,box-shadow .25s ease,background .25s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line);box-shadow:0 6px 24px -18px rgba(20,38,60,.4)}
.nav{display:flex;align-items:center;gap:26px;height:72px}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink);flex:none}
.brand:hover{color:var(--ink)}
.brand__logo{width:38px;height:38px;border-radius:10px;box-shadow:var(--shadow-sm);overflow:hidden}
.brand__logo img{width:100%;height:100%;object-fit:cover}
.brand__text{display:flex;flex-direction:column;line-height:1.15}
.brand__name{font-weight:800;font-size:17px;letter-spacing:-.02em}
.brand__sub{font-size:10.5px;letter-spacing:.11em;text-transform:uppercase;color:var(--muted);font-weight:600}
.nav__links{display:flex;align-items:center;gap:4px;margin-left:10px}
.nav__links a{
  color:var(--ink-3);font-size:14.5px;font-weight:550;padding:8px 12px;border-radius:8px;
  transition:background .16s,color .16s;
}
.nav__links a:hover{background:var(--paper-3);color:var(--ink)}
.nav__spacer{flex:1}
.nav__right{display:flex;align-items:center;gap:12px}

/* language segmented control */
.lang{
  display:inline-flex;align-items:center;background:var(--paper-3);
  border:1px solid var(--line);border-radius:999px;padding:3px;gap:2px;
}
.lang button{
  border:0;background:transparent;color:var(--muted);font-size:12.5px;font-weight:700;
  padding:5px 11px;border-radius:999px;cursor:pointer;letter-spacing:.02em;transition:.16s;
}
.lang button.is-active{background:#fff;color:var(--ink);box-shadow:var(--shadow-sm)}

.nav__toggle{display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:10px;cursor:pointer;align-items:center;justify-content:center}
.nav__toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative;border-radius:2px}
.nav__toggle span::before,.nav__toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.2s}
.nav__toggle span::before{top:-6px}
.nav__toggle span::after{top:6px}

/* ---------- hero ---------- */
.hero{position:relative;padding:88px 0 96px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(680px 380px at 84% 8%,rgba(111,168,208,.18),transparent 62%),
    radial-gradient(560px 360px at 8% 82%,rgba(224,169,58,.14),transparent 60%),
    radial-gradient(520px 320px at 62% 96%,rgba(110,159,142,.13),transparent 62%);
}
.hero__grid{position:relative;z-index:1;display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center}
.hero__badge{
  display:inline-flex;align-items:center;gap:9px;padding:7px 14px 7px 9px;border-radius:999px;
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);
  font-size:13px;font-weight:600;color:var(--ink-3);margin-bottom:24px;
}
.hero__badge .dot{width:20px;height:20px;border-radius:50%;background:var(--grad);display:inline-grid;place-items:center;color:#fff;font-size:11px}
.hero h1{font-size:clamp(38px,5vw,62px);line-height:1.08;letter-spacing:-.025em;margin-bottom:22px}
.hero h1 .serif{font-family:var(--serif);font-weight:700}
.hero__lead{font-size:clamp(16.5px,1.6vw,19.5px);color:var(--ink-3);max-width:560px;margin-bottom:14px}
.hero__lead b{color:var(--ink);font-weight:650}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin:30px 0 34px}
.hero__meta{display:flex;flex-wrap:wrap;gap:26px;padding-top:4px}
.hero__stat{display:flex;flex-direction:column}
.hero__stat b{font-family:var(--serif);font-size:30px;line-height:1;color:var(--ink);letter-spacing:-.02em}
.hero__stat span{font-size:12.5px;color:var(--muted);margin-top:7px;font-weight:550;letter-spacing:.02em}

/* hero visual */
.hero__visual{position:relative}
.hero__frame{
  position:relative;border-radius:var(--r-xl);background:#fff;padding:12px;
  border:1px solid var(--line);box-shadow:var(--shadow-lg);
  transform:rotate(-.6deg);
}
.hero__frame img{border-radius:calc(var(--r-xl) - 8px);width:100%;height:auto;background:var(--paper-2)}
.hero__frame::after{
  content:"";position:absolute;inset:-1px;border-radius:var(--r-xl);pointer-events:none;
  background:var(--grad);opacity:.35;z-index:-1;filter:blur(22px);transform:scale(.98);
}
.hero__chip{
  position:absolute;display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow-md);border-radius:12px;padding:10px 14px;font-size:12.5px;font-weight:650;color:var(--ink);
}
.hero__chip small{display:block;font-weight:500;color:var(--muted);font-size:11px;line-height:1.2}
.hero__chip--tl{top:-18px;left:-22px;transform:rotate(-2deg)}
.hero__chip--br{bottom:-20px;right:-14px;transform:rotate(1.5deg)}
.hero__chip .chip-ic{width:30px;height:30px;border-radius:9px;display:grid;place-items:center;background:var(--paper-3);font-size:14px;flex:none}
.hero__chip .chip-ic svg{width:17px;height:17px;display:block}
.card__ic svg{width:22px;height:22px;display:block}
.card__ic code{line-height:1}
.feat__ic{color:var(--accent-ink);font-weight:700;font-size:15px}
.feat__body code.ic,.docs-body code.ic,.lead code.ic{font-size:.86em}

/* ---------- value cards (why local-first) ---------- */
.grid{display:grid;gap:22px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}

.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease,border-color .2s;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--line-2)}
.card__ic{
  width:46px;height:46px;border-radius:12px;display:grid;place-items:center;margin-bottom:18px;
  background:var(--grad-soft);border:1px solid rgba(110,159,142,.22);font-size:20px;
}
.card h3{font-size:18.5px;margin-bottom:9px}
.card p{font-size:14.5px;color:var(--ink-3);line-height:1.65}

/* feature list rows */
.feat{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 40px;margin-top:8px}
.feat__item{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.feat__item:last-child{border-bottom:0}
.feat__ic{flex:none;width:34px;height:34px;border-radius:9px;background:var(--paper-2);display:grid;place-items:center;font-size:16px;border:1px solid var(--line)}
.feat__body b{display:block;color:var(--ink);font-size:15px;margin-bottom:3px;font-weight:650}
.feat__body span{font-size:13.5px;color:var(--muted);line-height:1.55}

/* ---------- chart families ---------- */
.families{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.family{
  display:flex;align-items:flex-start;gap:16px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-md);padding:18px 20px;transition:.2s;
}
.family:hover{border-color:var(--line-2);box-shadow:var(--shadow-sm)}
.family__num{font-family:var(--serif);font-size:24px;color:var(--gold-deep);line-height:1;font-weight:700;min-width:34px}
.family h4{font-size:15.5px;margin-bottom:4px}
.family p{font-size:12.8px;color:var(--muted);line-height:1.55}

/* ---------- domain packs ---------- */
.domains{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}
.domain{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:22px 18px;text-align:left;
  transition:.2s;position:relative;overflow:hidden;min-width:0;
}
.domain::before{content:"";position:absolute;left:0;top:0;height:3px;width:100%;background:var(--grad);opacity:.85}
.domain:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.domain .tag{font-family:var(--mono);font-size:12px;font-weight:700;color:var(--accent);background:rgba(46,111,142,.09);padding:3px 8px;border-radius:6px;display:inline-block;margin-bottom:12px;max-width:100%;overflow-wrap:anywhere}
.domain h4{font-size:15.5px;margin-bottom:6px}
.domain p{font-size:12.6px;color:var(--muted);line-height:1.5}
.domain{cursor:pointer;outline:none}
.domain:focus-visible{box-shadow:0 0 0 3px rgba(46,111,142,.22)}
.domain.is-active{border-color:rgba(46,111,142,.5);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.domain.is-active::before{opacity:1}
.domain__cue{display:inline-flex;align-items:center;gap:6px;margin-top:12px;font-size:12px;font-weight:700;color:var(--accent);opacity:.8;transition:.2s}
.domain__cue i{font-style:normal;transition:transform .2s}
.domain:hover .domain__cue{opacity:1}
.domain:hover .domain__cue i{transform:translateX(3px)}
.domain.is-active .domain__cue{color:var(--accent-ink);opacity:1}

.domain-samples{margin-top:26px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;box-shadow:var(--shadow-md)}
.domain-samples__head{display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 16px;margin-bottom:18px}
.domain-samples__head h3{font-size:17px;margin:0}
.domain-samples__head p{font-size:13.6px;line-height:1.6;color:var(--muted);margin:0;max-width:820px}
.domain-samples__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.dsample{margin:0;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;transition:.22s}
.dsample:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(46,111,142,.32)}
.dsample__img{aspect-ratio:16/9;overflow:hidden;background:#fff}
.dsample__img img{width:100%;height:100%;object-fit:cover;display:block}
.dsample figcaption{padding:8px 12px;font-size:12.8px;font-weight:600;color:var(--ink-2)}
@media (max-width:900px){.domain-samples__grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.domain-samples{padding:18px}.domain-samples__grid{grid-template-columns:1fr}}

/* ---------- split feature (stats / publication / a11y) ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.split--rev .split__media{order:2}
.split__media img{width:100%;height:auto;display:block;border-radius:var(--r-lg);border:1px solid var(--line);box-shadow:var(--shadow-md);background:#fff}
.split__cap{margin:12px 2px 0;font-size:12.8px;color:var(--muted);text-align:center}
.split h2{font-size:clamp(26px,3vw,36px);margin-bottom:16px}
.split .lead{font-size:16.5px;margin-bottom:24px}
.check{list-style:none;display:grid;gap:13px}
.check li{display:flex;gap:12px;font-size:14.8px;color:var(--ink-2);line-height:1.55}
.check li::before{
  content:"";flex:none;width:20px;height:20px;margin-top:2px;border-radius:50%;
  background:var(--grad-soft);border:1px solid rgba(110,159,142,.35);
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236E9F8E' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>");
  background-repeat:no-repeat;background-position:center;
}

/* stat band */
.statband{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);border-radius:var(--r-lg);background:#fff;overflow:hidden;box-shadow:var(--shadow-sm)}
.statband__cell{padding:30px 26px;border-right:1px solid var(--line)}
.statband__cell:last-child{border-right:0}
.statband__cell b{display:block;font-family:var(--serif);font-size:36px;line-height:1;color:var(--ink);letter-spacing:-.02em;margin-bottom:9px}
.statband__cell span{font-size:13px;color:var(--muted);font-weight:550}
.statband__cell b em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* ---------- quick start / code ---------- */
.quick{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.steps{display:grid;gap:18px;counter-reset:step}
.step{display:flex;gap:16px;align-items:flex-start}
.step__num{
  flex:none;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;
  background:var(--ink);color:#fff;font-size:13.5px;font-weight:700;
}
.step__body b{display:block;color:var(--ink);font-size:15px;margin-bottom:5px}
.step__body span{font-size:13.7px;color:var(--muted);line-height:1.55}

.codecard{background:#0F1D2E;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow-lg);border:1px solid #1d3147}
.codecard__bar{display:flex;align-items:center;gap:8px;padding:12px 16px;background:#132437;border-bottom:1px solid #1d3147}
.codecard__dots{display:flex;gap:6px}
.codecard__dots i{width:10px;height:10px;border-radius:50%;background:#2c4159}
.codecard__dots i:nth-child(1){background:#E8772E}
.codecard__dots i:nth-child(2){background:#E0A93A}
.codecard__dots i:nth-child(3){background:#6E9F8E}
.codecard__title{font-family:var(--mono);font-size:12px;color:#8aa0b6;margin-left:6px}
.codecard pre{margin:0;padding:22px 20px;overflow-x:auto;font-family:var(--mono);font-size:13.3px;line-height:1.85;color:#c7d6e4}
.codecard .cmt{color:#5f768d}
.codecard .cmd{color:#7fd0b0}
.codecard .flag{color:#e5c377}
.codecard .arg{color:#8fb9d8}
.copybtn{
  margin-left:auto;display:inline-flex;align-items:center;gap:6px;border:1px solid #27405a;background:#16293c;
  color:#a9bfd4;font-size:11.5px;font-weight:600;padding:5px 10px;border-radius:7px;cursor:pointer;transition:.16s;
}
.copybtn:hover{background:#1d3448;color:#dbe7f2}
.copybtn.is-done{color:#7fd0b0;border-color:#2f5e4c}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto;display:grid;gap:12px}
.faq details{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:0;overflow:hidden;
  transition:box-shadow .2s,border-color .2s;
}
.faq details[open]{box-shadow:var(--shadow-sm);border-color:var(--line-2)}
.faq summary{
  list-style:none;cursor:pointer;padding:19px 24px;display:flex;align-items:center;gap:14px;
  font-weight:650;color:var(--ink);font-size:15.2px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";margin-left:auto;font-size:20px;font-weight:400;color:var(--muted);transition:transform .2s;
}
.faq details[open] summary::after{transform:rotate(45deg);color:var(--accent)}
.faq .faq__a{padding:0 24px 20px 24px;color:var(--ink-3);font-size:14.5px;line-height:1.72}
.faq .faq__a b{color:var(--ink)}

/* ---------- CTA band ---------- */
.cta{
  position:relative;border-radius:var(--r-xl);overflow:hidden;padding:64px 56px;
  background:#0F1D2E;color:#dbe4ee;box-shadow:var(--shadow-lg);
}
.cta::before{content:"";position:absolute;inset:0;background:
  radial-gradient(600px 300px at 88% 10%,rgba(111,168,208,.28),transparent 60%),
  radial-gradient(500px 300px at 6% 96%,rgba(224,169,58,.22),transparent 58%),
  radial-gradient(460px 280px at 56% 104%,rgba(110,159,142,.2),transparent 60%);}
.cta__in{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta h2{color:#fff;font-size:clamp(26px,3.2vw,38px);margin-bottom:12px}
.cta p{color:#a9bccf;font-size:16px;max-width:560px}
.cta .btn--grad{flex:none}

/* ---------- footer ---------- */
.site-footer{background:var(--paper-2);border-top:1px solid var(--line);padding:64px 0 36px;margin-top:0}
.footer__top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.footer__brand p{font-size:13.5px;color:var(--muted);max-width:300px;margin-top:16px;line-height:1.65}
.footer__col h5{font-size:12px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted);margin:0 0 16px;font-weight:700}
.footer__col a{display:block;color:var(--ink-3);font-size:14px;padding:5px 0;transition:.15s}
.footer__col a:hover{color:var(--ink)}
.footer__bottom{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:28px;border-top:1px solid var(--line);flex-wrap:wrap}
.footer__bottom p{font-size:12.5px;color:var(--muted)}
.footer__badges{display:flex;gap:10px;flex-wrap:wrap}
.pill{
  display:inline-flex;align-items:center;gap:6px;font-size:11.5px;font-weight:600;color:var(--ink-3);
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:5px 11px;
}
.pill i{width:6px;height:6px;border-radius:50%;background:var(--teal)}

/* ---------- reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s cubic-bezier(.2,.7,.2,1),transform .6s cubic-bezier(.2,.7,.2,1)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* =========================================================
   GALLERY PAGE
   ========================================================= */
.gallery-hero{padding:64px 0 32px;text-align:center}
.gallery-hero h1{font-size:clamp(32px,4.4vw,50px);margin-bottom:16px}
.gallery-hero .lead{margin:0 auto}
.filters{
  position:sticky;top:72px;z-index:60;background:rgba(251,250,247,.9);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  padding:16px 0;border-bottom:1px solid var(--line);margin-bottom:36px;
}
.filters__row{display:flex;gap:9px;flex-wrap:wrap;justify-content:center}
.filt{
  border:1px solid var(--line);background:#fff;color:var(--ink-3);font-size:13.2px;font-weight:600;
  padding:8px 15px;border-radius:999px;cursor:pointer;transition:.16s;white-space:nowrap;
}
.filt:hover{border-color:var(--line-2);color:var(--ink)}
.filt.is-active{background:var(--ink);color:#fff;border-color:var(--ink)}
.filt .n{opacity:.6;font-size:11px;margin-left:5px}

.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;padding-bottom:40px}
.gcard{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;cursor:pointer;
  transition:transform .2s,box-shadow .2s,border-color .2s;opacity:0;transform:translateY(14px);
}
.gcard.is-shown{opacity:1;transform:none;transition:opacity .45s,transform .45s,box-shadow .2s,border-color .2s}
.gcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--line-2)}
.gcard__img{position:relative;aspect-ratio:16/9;background:var(--paper-2);overflow:hidden}
.gcard__img img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.gcard:hover .gcard__img img{transform:scale(1.035)}
.gcard__img::after{
  content:"";position:absolute;inset:0;box-shadow:inset 0 0 0 1px rgba(20,38,60,.04);
}
.gcard__body{padding:15px 17px 17px;display:flex;align-items:center;justify-content:space-between;gap:10px}
.gcard__body b{font-size:14.5px;color:var(--ink);font-weight:650;display:block}
.gcard__body span{font-size:11.5px;color:var(--muted);font-family:var(--mono)}
.gcard__fam{font-size:10.5px;font-weight:700;color:var(--accent);background:rgba(46,111,142,.08);padding:3px 8px;border-radius:6px;white-space:nowrap}

/* lightbox */
.lightbox{
  position:fixed;inset:0;z-index:200;background:rgba(9,18,30,.88);backdrop-filter:blur(6px);
  display:none;align-items:center;justify-content:center;padding:32px;opacity:0;transition:opacity .22s;
}
.lightbox.is-open{display:flex;opacity:1}
.lightbox__inner{max-width:1080px;width:100%;position:relative}
.lightbox__img{width:100%;border-radius:12px;box-shadow:0 40px 90px rgba(0,0,0,.5);background:#fff}
.lightbox__cap{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:16px;color:#c8d6e4}
.lightbox__cap b{font-size:16px;color:#fff;font-weight:650}
.lightbox__cap span{font-size:12.5px;color:#8aa0b6;font-family:var(--mono)}
.lightbox__close{
  position:absolute;top:-14px;right:-14px;width:40px;height:40px;border-radius:50%;border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.08);color:#fff;font-size:20px;cursor:pointer;display:grid;place-items:center;transition:.16s;
}
.lightbox__close:hover{background:rgba(255,255,255,.18)}
.lightbox__nav{
  position:absolute;top:50%;transform:translateY(-50%);width:46px;height:46px;border-radius:50%;
  border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.08);color:#fff;font-size:20px;
  cursor:pointer;display:grid;place-items:center;transition:.16s;
}
.lightbox__nav:hover{background:rgba(255,255,255,.2)}
.lightbox__nav--prev{left:-60px}
.lightbox__nav--next{right:-60px}

/* =========================================================
   DOCS PAGE
   ========================================================= */
.docs-hero{padding:64px 0 40px;border-bottom:1px solid var(--line)}
.docs-hero h1{font-size:clamp(30px,4vw,46px);margin-bottom:14px}
.docs-hero .lead{max-width:760px}
.docs-layout{display:grid;grid-template-columns:230px 1fr;gap:56px;padding:56px 0 40px;align-items:start}
.docs-nav{position:sticky;top:96px;display:grid;gap:3px}
.docs-nav h5{font-size:11px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted);margin:0 0 10px;font-weight:700}
.docs-nav a{color:var(--ink-3);font-size:14px;padding:7px 12px;border-radius:8px;border-left:2px solid transparent;transition:.15s}
.docs-nav a:hover{background:var(--paper-2);color:var(--ink)}
.docs-nav a.is-active{color:var(--ink);font-weight:650;border-left-color:var(--grad);background:var(--paper-2)}
.docs-body{max-width:820px}
.docs-body section{margin-bottom:56px;scroll-margin-top:96px}
.docs-body h2{font-size:26px;margin-bottom:8px;padding-top:6px}
.docs-body h3{font-size:18px;margin:26px 0 10px}
.docs-body p{color:var(--ink-3);font-size:15.2px;margin-bottom:14px;line-height:1.72}
.docs-body ul.dot{list-style:none;display:grid;gap:9px;margin-bottom:18px}
.docs-body ul.dot li{position:relative;padding-left:20px;font-size:14.6px;color:var(--ink-3);line-height:1.65}
.docs-body ul.dot li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--teal)}
.docs-body .codecard{margin:18px 0}
.docs-table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}
.docs-table th,.docs-table td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top;overflow-wrap:anywhere}
.docs-table th{color:var(--ink);font-weight:650;font-size:12.5px;letter-spacing:.04em;text-transform:uppercase;background:var(--paper-2)}
.docs-table td{color:var(--ink-3)}
.docs-table td code,.ic{font-family:var(--mono);font-size:.88em;background:var(--paper-3);padding:1.5px 6px;border-radius:5px;color:var(--accent-ink)}
.note{
  display:flex;gap:14px;padding:18px 20px;border-radius:var(--r-md);background:var(--grad-soft);
  border:1px solid rgba(110,159,142,.25);margin:20px 0;font-size:14.2px;color:var(--ink-2);line-height:1.65;
}
.note .ni{font-size:18px;flex:none}
.note b{color:var(--ink)}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .hero__grid{grid-template-columns:1fr;gap:52px}
  .hero__visual{max-width:640px}
  .domains{grid-template-columns:repeat(3,minmax(0,1fr))}
  .gallery-grid{grid-template-columns:repeat(2,1fr)}
  .docs-layout{grid-template-columns:1fr;gap:20px}
  .docs-nav{position:static;display:flex;flex-wrap:wrap;gap:6px;padding-bottom:14px;border-bottom:1px solid var(--line)}
  .docs-nav h5{width:100%}
  .docs-nav a{border-left:0;border:1px solid var(--line);background:#fff}
}
@media (max-width:900px){
  .nav__links{display:none}
  .nav__toggle{display:flex}
  .grid--4{grid-template-columns:repeat(2,1fr)}
  .grid--3{grid-template-columns:1fr}
  .feat{grid-template-columns:1fr}
  .families{grid-template-columns:1fr}
  .split{grid-template-columns:1fr;gap:36px}
  .split--rev .split__media{order:0}
  .quick{grid-template-columns:1fr;gap:32px}
  .footer__top{grid-template-columns:1fr 1fr}
  .statband{grid-template-columns:repeat(2,1fr)}
  .statband__cell:nth-child(2){border-right:0}
  .statband__cell:nth-child(1),.statband__cell:nth-child(2){border-bottom:1px solid var(--line)}
}
@media (max-width:640px){
  body{font-size:16px}
  .container{padding:0 20px}
  .nav{gap:10px}
  .nav__right{gap:8px}
  .nav__right > .btn{display:none}
  .section{padding:72px 0}
  .hero{padding:56px 0 64px}
  .hero__actions .btn{flex:1 1 auto;justify-content:center}
  .hero__meta{gap:20px}
  .hero__chip{display:none}
  .domains{grid-template-columns:repeat(2,minmax(0,1fr))}
  .gallery-grid{grid-template-columns:1fr}
  .cta{padding:44px 26px}
  .cta__in{flex-direction:column;align-items:flex-start}
  .footer__top{grid-template-columns:1fr;gap:28px}
  .statband{grid-template-columns:1fr}
  .statband__cell{border-right:0;border-bottom:1px solid var(--line)}
  .statband__cell:last-child{border-bottom:0}
  .lightbox__nav--prev{left:8px}
  .lightbox__nav--next{right:8px}
  .filters{top:72px}
}

/* mobile nav drawer */
.mobile-nav{
  position:fixed;inset:72px 0 auto;z-index:70;background:var(--paper);border-bottom:1px solid var(--line);
  padding:16px 20px 26px;display:none;box-shadow:var(--shadow-md);
}
.mobile-nav.is-open{display:block}
.mobile-nav a{display:block;padding:13px 8px;border-bottom:1px solid var(--line);color:var(--ink);font-weight:600;font-size:15px}
.mobile-nav a:last-child{border-bottom:0}
.mobile-nav .btn{margin-top:16px;width:100%}