/* ===== 01. reset ===== */
*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{ margin:0; }
ul[class],ol[class]{ list-style:none; padding-left:0; margin:0; }
img,svg,video{ max-width:100%; display:block; }
a{ color:inherit; }
button{ font:inherit; color:inherit; background:none; border:0; }
table{ border-collapse:collapse; }

/* ===== 02. tokens ===== */
:root{
  --ink-950:#070B1A;
  --ink-900:#0B1026;
  --ink-800:#121A3A;
  --ink-700:#1B2650;
  --cyan:#5FF2E9;
  --cyan-12:rgba(95,242,233,.12);
  --cyan-40:rgba(95,242,233,.40);
  --orange:#FF9B54;
  --orange-20:rgba(255,155,84,.20);
  --paper:#E8ECF4;
  --muted:#A7B0C4;
  --sheet:#F5F7FB;
  --line:#2C3A66;
  --line-soft:rgba(44,58,102,.55);

  --font-heading:"Source Han Serif SC","Noto Serif SC","Songti SC",serif;
  --font-body:Inter,"Noto Sans SC","PingFang SC",system-ui,-apple-system,sans-serif;
  --font-data:"Oswald","Barlow Condensed","Noto Sans SC",sans-serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,monospace;

  --radius-pill:999px;
  --radius-card:18px;
  --wrap:1240px;
  --gap:clamp(16px,2.2vw,28px);
  --shadow-card:0 30px 60px -44px rgba(0,0,0,.95);
}

/* ===== 03. base ===== */
body{
  min-height:100vh;
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  color:var(--paper);
  background-color:var(--ink-900);
  background-image:
    radial-gradient(920px 540px at 88% -8%, rgba(95,242,233,.10), transparent 62%),
    radial-gradient(680px 460px at -8% 14%, rgba(255,155,84,.07), transparent 60%),
    linear-gradient(rgba(44,58,102,.20) 1px, transparent 1px),
    linear-gradient(90deg, rgba(44,58,102,.20) 1px, transparent 1px);
  background-size:auto,auto,64px 64px,64px 64px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
h1,h2,h3,h4{ font-family:var(--font-heading); font-weight:600; line-height:1.22; letter-spacing:.01em; color:var(--paper); }
h1{ font-size:clamp(28px,4.4vw,56px); }
h2{ font-size:clamp(24px,3.2vw,40px); }
h3{ font-size:clamp(18px,2vw,28px); }
h4{ font-size:20px; }
p{ font-size:16px; }
strong{ color:var(--paper); font-weight:600; }
:focus-visible{ outline:2px solid var(--cyan); outline-offset:3px; border-radius:4px; }

/* ===== 04. utilities ===== */
.sr-only{ position:absolute; width:1px; height:1px; padding:0; margin:-1px; overflow:hidden; clip:rect(0 0 0 0); white-space:nowrap; border:0; }
.mono{ font-family:var(--font-mono); letter-spacing:.02em; }
.muted{ color:var(--muted); }
.data-label{ display:inline-block; font-family:var(--font-data); font-size:12px; letter-spacing:.16em; text-transform:uppercase; color:var(--cyan); }
.skip-link{
  position:absolute; left:16px; top:-72px; z-index:120;
  padding:10px 18px; border-radius:0 0 12px 12px;
  background:var(--cyan); color:var(--ink-950); text-decoration:none;
  font-family:var(--font-data); font-size:13px; letter-spacing:.1em; text-transform:uppercase;
  transition:top .2s ease;
}
.skip-link:focus{ top:0; }

/* ===== 05. layout ===== */
.container{ width:min(var(--wrap), 100% - clamp(32px,7vw,80px)); margin-inline:auto; }
.container--narrow{ width:min(860px, 100% - clamp(32px,7vw,80px)); margin-inline:auto; }
.site-main{ padding-top:clamp(98px,13vh,138px); }
.section{ padding:clamp(46px,7vw,88px) 0; }
.section--tight{ padding:clamp(26px,3.6vw,48px) 0; }
.section-head{ display:flex; flex-wrap:wrap; align-items:flex-end; justify-content:space-between; gap:18px; margin-bottom:clamp(20px,3vw,34px); }
.section-head__text{ max-width:64ch; display:grid; gap:10px; }
.eyebrow{ display:inline-flex; align-items:center; gap:10px; font-family:var(--font-data); font-size:12px; letter-spacing:.2em; text-transform:uppercase; color:var(--cyan); }
.eyebrow::before{ content:""; width:26px; height:1px; background:currentColor; opacity:.65; }
.lede{ font-size:clamp(16px,1.4vw,20px); line-height:1.65; color:var(--muted); max-width:66ch; }
.rule{ height:1px; border:0; margin:clamp(28px,4vw,48px) 0; background:linear-gradient(90deg,var(--line),rgba(44,58,102,0)); }

.grid{ display:grid; gap:var(--gap); }
.grid--2{ grid-template-columns:repeat(2,minmax(0,1fr)); }
.grid--3{ grid-template-columns:repeat(3,minmax(0,1fr)); }
.grid--4{ grid-template-columns:repeat(4,minmax(0,1fr)); }
.grid--sidebar{ grid-template-columns:minmax(0,1fr) minmax(0,300px); align-items:start; }
.stack{ display:grid; gap:clamp(14px,2vw,22px); }
.media-grid{ display:grid; gap:var(--gap); grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); }

/* ===== 06. buttons ===== */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:13px 22px; border-radius:var(--radius-pill); border:1px solid transparent;
  font-family:var(--font-data); font-size:14px; letter-spacing:.08em; text-transform:uppercase;
  text-decoration:none; cursor:pointer; white-space:nowrap;
  transition:background .22s ease,color .22s ease,border-color .22s ease,transform .22s ease;
}
.btn--primary{ background:var(--cyan); color:var(--ink-950); font-weight:600; box-shadow:0 16px 34px -22px var(--cyan-40); }
.btn--primary:hover{ background:#8CF7F0; transform:translateY(-1px); }
.btn--ghost{ background:rgba(18,26,58,.55); border-color:var(--line); color:var(--paper); }
.btn--ghost:hover{ border-color:var(--cyan-40); color:var(--cyan); }
.btn--sm{ padding:9px 16px; font-size:12px; letter-spacing:.1em; }

/* ===== 07. header ===== */
.site-header{
  position:fixed; inset:0 0 auto 0; z-index:60;
  padding:18px clamp(16px,4vw,48px);
  pointer-events:none;
  transition:padding .3s ease;
}
.site-header__inner{
  pointer-events:auto;
  max-width:var(--wrap); margin-inline:auto;
  display:flex; align-items:center; gap:clamp(10px,1.6vw,22px);
  padding:10px 12px 10px 18px;
  border:1px solid var(--line);
  border-radius:var(--radius-pill);
  background:rgba(7,11,26,.74);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  box-shadow:0 22px 48px -34px rgba(0,0,0,.95), inset 0 1px 0 rgba(95,242,233,.08);
  transition:padding .3s ease,background .3s ease,border-color .3s ease;
}
.site-header[data-compact] .site-header__inner{ padding:6px 10px 6px 14px; background:rgba(7,11,26,.9); border-color:var(--line-soft); }
.site-header[data-compact] .brand__mark{ width:30px; height:30px; border-radius:10px; font-size:14px; }

.scroll-meter{ position:fixed; left:0; right:0; top:0; height:2px; background:rgba(44,58,102,.45); }
.scroll-meter__bar{ display:block; width:100%; height:100%; transform:scaleX(0); transform-origin:0 50%; background:linear-gradient(90deg,var(--cyan),var(--orange)); }

.brand{ display:inline-flex; align-items:center; gap:11px; text-decoration:none; color:var(--paper); flex:0 0 auto; }
.brand__mark{
  width:36px; height:36px; border-radius:12px; flex:0 0 auto;
  display:grid; place-items:center;
  font-family:var(--font-data); font-size:15px; letter-spacing:.06em; font-weight:600;
  color:var(--ink-950);
  background:linear-gradient(140deg,var(--cyan),#2CC7C0);
  box-shadow:0 0 0 1px rgba(95,242,233,.45), 0 12px 26px -14px rgba(95,242,233,.6);
  transition:width .3s ease,height .3s ease,border-radius .3s ease,font-size .3s ease;
}
.brand__text{ display:grid; gap:1px; }
.brand__name{ font-family:var(--font-heading); font-size:16px; font-weight:700; letter-spacing:.02em; }
.brand__sub{ font-family:var(--font-mono); font-size:10px; letter-spacing:.12em; color:var(--muted); }

.nav-capsule{ margin-inline:auto; min-width:0; }
.nav-capsule__list{
  display:flex; align-items:center; gap:2px;
  padding:4px; border-radius:var(--radius-pill);
  background:rgba(18,26,58,.62); border:1px solid var(--line-soft);
}
.nav-capsule__item{ flex:0 0 auto; }
.nav-capsule__link{
  display:block; padding:8px 14px; border-radius:var(--radius-pill);
  font-size:14px; color:var(--muted); text-decoration:none; white-space:nowrap;
  transition:color .2s ease,background .2s ease;
}
.nav-capsule__link:hover{ color:var(--paper); background:var(--cyan-12); }
.nav-capsule__link[aria-current="page"]{ color:var(--ink-950); background:var(--cyan); font-weight:600; }

.site-header__actions{ display:flex; align-items:center; gap:10px; margin-left:auto; flex:0 0 auto; }
.nav-toggle{
  display:none; width:42px; height:42px; border-radius:14px; cursor:pointer;
  border:1px solid var(--line); background:rgba(18,26,58,.75);
  flex-direction:column; align-items:center; justify-content:center; gap:4px;
  transition:border-color .2s ease,background .2s ease;
}
.nav-toggle:hover{ border-color:var(--cyan-40); }
.nav-toggle__bar{ width:18px; height:2px; border-radius:2px; background:var(--paper); transition:transform .25s ease,opacity .2s ease,background .2s ease; }
.site-header[data-open] .nav-toggle{ border-color:var(--cyan-40); }
.site-header[data-open] .nav-toggle .nav-toggle__bar{ background:var(--cyan); }
.site-header[data-open] .nav-toggle .nav-toggle__bar:nth-child(1){ transform:translateY(6px) rotate(45deg); }
.site-header[data-open] .nav-toggle .nav-toggle__bar:nth-child(2){ opacity:0; }
.site-header[data-open] .nav-toggle .nav-toggle__bar:nth-child(3){ transform:translateY(-6px) rotate(-45deg); }

/* ===== 08. generic components ===== */
.card{
  position:relative; padding:clamp(18px,2.4vw,26px);
  border:1px solid var(--line); border-radius:var(--radius-card);
  background:linear-gradient(180deg,rgba(27,38,80,.58),rgba(18,26,58,.34));
  box-shadow:var(--shadow-card);
}
.card--paper{ background:var(--sheet); color:var(--ink-900); border-color:rgba(7,11,26,.14); }
.card--paper .card__text{ color:#3B4663; }
.card--paper .card__label{ color:#0F6E6A; }
.card__label{ display:inline-block; margin-bottom:10px; font-family:var(--font-data); font-size:12px; letter-spacing:.16em; text-transform:uppercase; color:var(--cyan); }
.card__title{ font-family:var(--font-heading); font-size:clamp(18px,1.8vw,24px); margin-bottom:8px; }
.card__text{ font-size:15px; line-height:1.6; color:var(--muted); }
.card--link{ display:block; text-decoration:none; transition:transform .3s ease,border-color .3s ease; }
.card--link:hover{ transform:translateY(-3px); border-color:var(--cyan-40); }

.tag{
  display:inline-flex; align-items:center; gap:6px;
  padding:4px 11px; border-radius:var(--radius-pill);
  border:1px solid var(--line); background:rgba(18,26,58,.6);
  font-family:var(--font-mono); font-size:12px; color:var(--muted);
}
.tag--cyan{ background:var(--cyan); border-color:transparent; color:var(--ink-950); font-weight:600; }
.tag--orange{ background:var(--orange); border-color:transparent; color:var(--ink-950); font-weight:600; }
.tag--outline-cyan{ background:var(--cyan-12); border-color:var(--cyan-40); color:var(--cyan); }

.batch-chip{
  display:inline-flex; align-items:center; gap:10px;
  padding:6px 13px; border-radius:var(--radius-pill);
  border:1px dashed var(--line); background:rgba(18,26,58,.5);
  font-family:var(--font-mono); font-size:12px; color:var(--muted);
}
.batch-chip__key{ letter-spacing:.14em; text-transform:uppercase; font-family:var(--font-data); font-size:11px; }
.batch-chip__val{ color:var(--cyan); }

.stat{ display:grid; gap:4px; }
.stat__value{ font-family:var(--font-mono); font-size:clamp(24px,3vw,40px); line-height:1; color:var(--cyan); }
.stat__label{ font-family:var(--font-data); font-size:12px; letter-spacing:.14em; text-transform:uppercase; color:var(--muted); }

.breadcrumb{ margin-bottom:22px; }
.breadcrumb__list{ display:flex; flex-wrap:wrap; align-items:center; gap:8px; font-size:13px; color:var(--muted); }
.breadcrumb__item{ display:inline-flex; align-items:center; gap:8px; }
.breadcrumb__item + .breadcrumb__item::before{ content:"/"; color:var(--line); }
.breadcrumb__link{ color:var(--muted); text-decoration:none; transition:color .2s ease; }
.breadcrumb__link:hover{ color:var(--cyan); }
.breadcrumb__item[aria-current="page"]{ color:var(--paper); }

.media{
  position:relative; display:block; overflow:hidden;
  aspect-ratio:16/9; border-radius:var(--radius-card);
  border:1px solid var(--line);
  background:linear-gradient(160deg,var(--ink-800),var(--ink-950));
}
.media--wide{ aspect-ratio:21/9; }
.media--square{ aspect-ratio:1/1; }
.media--tall{ aspect-ratio:3/4; }
.media > img,.media > svg{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; }
.media::after{ content:""; position:absolute; inset:10px; border:1px solid rgba(95,242,233,.22); border-radius:calc(var(--radius-card) - 7px); pointer-events:none; }
.media__caption{ margin-top:10px; font-size:13px; color:var(--muted); }

/* ===== 09. footer ===== */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,112px);
  padding-bottom:34px;
  background:linear-gradient(180deg,var(--ink-950) 0%,#050813 100%);
  border-top:1px solid var(--line);
  color:var(--muted);
}
.site-footer::before{
  content:""; position:absolute; top:-1px; left:0; right:0; height:1px;
  background:linear-gradient(90deg,transparent,rgba(95,242,233,.55) 24%,rgba(255,155,84,.4) 64%,transparent);
}
.site-footer__stack{ position:absolute; top:-16px; left:50%; transform:translateX(-50%); width:min(1120px,86%); height:16px; pointer-events:none; }
.site-footer__stack::before,
.site-footer__stack::after{ content:""; position:absolute; border:1px solid var(--line); border-bottom:0; }
.site-footer__stack::before{ top:0; bottom:0; left:7%; right:7%; border-radius:14px 14px 0 0; background:rgba(18,26,58,.55); }
.site-footer__stack::after{ top:8px; bottom:0; left:0; right:0; border-radius:12px 12px 0 0; background:rgba(27,38,80,.85); }

.site-footer__inner{ position:relative; z-index:1; padding-top:clamp(48px,6vw,72px); }
.footer-grid{ display:grid; grid-template-columns:1.5fr 1fr 1.5fr 1fr; gap:clamp(22px,3vw,44px); }
.footer-col{ position:relative; padding-top:18px; border-top:1px solid var(--line); }
.footer-col::before{ content:""; position:absolute; top:-1px; left:0; width:34px; height:2px; background:var(--cyan); }
.footer-col--brand{
  margin-top:-14px; padding:20px 20px 18px;
  border:1px solid var(--line); border-radius:var(--radius-card);
  background:linear-gradient(180deg,rgba(27,38,80,.62),rgba(18,26,58,.3));
  box-shadow:var(--shadow-card);
}
.footer-col--brand::before{ width:48px; background:var(--orange); }
.footer-col__title{ font-family:var(--font-data); font-size:13px; font-weight:600; letter-spacing:.16em; text-transform:uppercase; color:var(--cyan); margin-bottom:14px; }
.footer-col__lead{ margin:14px 0 16px; font-size:14px; line-height:1.6; color:var(--muted); }
.footer-col__note{ margin-top:14px; font-size:13px; color:var(--muted); }
.footer-links{ display:grid; gap:9px; }
.footer-links__link{
  display:inline-flex; align-items:center; gap:8px;
  font-size:14px; color:var(--muted); text-decoration:none;
  transition:color .2s ease;
}
.footer-links__link::before{ content:""; width:6px; height:6px; border:1px solid currentColor; transform:rotate(45deg); opacity:.6; flex:0 0 auto; }
.footer-links__link:hover{ color:var(--cyan); }

.contact-list{ display:grid; gap:12px; }
.contact-list__item{ display:flex; flex-wrap:wrap; align-items:center; gap:8px 10px; }
.contact-list__item--wide{ align-items:flex-start; }
.contact-list__key{ flex:0 0 64px; font-family:var(--font-data); font-size:11px; letter-spacing:.14em; text-transform:uppercase; color:var(--muted); }
.contact-list__val{ font-size:14px; color:var(--paper); word-break:break-all; }
.copy-btn{
  padding:4px 11px; border-radius:var(--radius-pill); cursor:pointer;
  border:1px solid var(--line); color:var(--muted); background:rgba(18,26,58,.5);
  font-family:var(--font-data); font-size:11px; letter-spacing:.12em; text-transform:uppercase;
  transition:color .2s ease,background .2s ease,border-color .2s ease;
}
.copy-btn:hover{ color:var(--ink-950); background:var(--cyan); border-color:var(--cyan); }
.copy-btn[data-copied]{ color:var(--ink-950); background:var(--orange); border-color:var(--orange); }

.footer-bottom{
  display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:12px;
  margin-top:clamp(32px,5vw,52px); padding-top:18px;
  border-top:1px solid var(--line); font-size:13px;
}
.footer-bottom__copy,.footer-bottom__meta{ margin:0; font-size:13px; color:var(--muted); }
.footer-bottom__meta{ font-family:var(--font-mono); letter-spacing:.06em; }

.to-top{
  position:fixed; right:clamp(14px,3vw,28px); bottom:clamp(14px,3vw,28px); z-index:55;
  padding:10px 16px; border-radius:var(--radius-pill); cursor:pointer;
  border:1px solid var(--line); background:rgba(7,11,26,.86); color:var(--paper);
  font-family:var(--font-data); font-size:12px; letter-spacing:.14em; text-transform:uppercase;
  backdrop-filter:blur(10px); -webkit-backdrop-filter:blur(10px);
  opacity:0; transform:translateY(10px); pointer-events:none;
  transition:opacity .25s ease,transform .25s ease,border-color .2s ease,color .2s ease;
}
.to-top[data-visible]{ opacity:1; transform:none; pointer-events:auto; }
.to-top:hover{ border-color:var(--cyan-40); color:var(--cyan); }

/* ===== 10. reveal ===== */
.js [data-reveal]{ opacity:0; transform:translateY(18px); transition:opacity .6s ease,transform .7s cubic-bezier(.22,.7,.3,1); }
.js [data-reveal].is-visible{ opacity:1; transform:none; }

/* ===== 11. responsive ===== */
@media (max-width:1100px){
  .footer-grid{ grid-template-columns:1.3fr 1fr 1.3fr; }
  .footer-col--brand{ grid-column:1 / -1; margin-top:0; }
}
@media (max-width:980px){
  .grid--4{ grid-template-columns:repeat(2,minmax(0,1fr)); }
  .grid--3{ grid-template-columns:repeat(2,minmax(0,1fr)); }
  .grid--sidebar{ grid-template-columns:1fr; }
}
@media (max-width:900px){
  .site-header{ padding:12px 14px; }
  .site-header__inner{ border-radius:20px; padding:8px 10px 8px 14px; }
  .site-header[data-compact] .site-header__inner{ padding:8px 10px 8px 14px; }
  .nav-toggle{ display:inline-flex; }
  .nav-capsule{
    position:fixed; left:12px; right:12px; bottom:12px; z-index:70;
    margin:0; border:1px solid var(--line); border-radius:18px;
    background:rgba(7,11,26,.95);
    backdrop-filter:blur(18px); -webkit-backdrop-filter:blur(18px);
    box-shadow:0 -22px 52px -34px rgba(0,0,0,.95);
    max-height:0; padding:0 8px; opacity:0; transform:translateY(14px);
    overflow:hidden; pointer-events:none;
    transition:opacity .28s ease,transform .28s ease,max-height .3s ease,padding .3s ease;
  }
  .site-header[data-open] .nav-capsule{ max-height:120px; padding:8px; opacity:1; transform:none; pointer-events:auto; }
  .nav-capsule__list{
    flex-direction:row; flex-wrap:nowrap; gap:6px;
    padding:0; background:transparent; border:0;
    overflow-x:auto; overflow-y:hidden;
    -webkit-overflow-scrolling:touch;
    scroll-snap-type:x proximity;
    scrollbar-width:thin;
  }
  .nav-capsule__link{ padding:11px 15px; border-radius:12px; font-size:15px; scroll-snap-align:center; background:rgba(18,26,58,.6); }
  .nav-capsule__link[aria-current="page"]{ background:var(--cyan); }
  .to-top{ bottom:92px; }
  .footer-grid{ grid-template-columns:1fr 1fr; }
  .footer-col--brand{ grid-column:1 / -1; }
}
@media (max-width:640px){
  .grid--2,.grid--3,.grid--4{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr; }
  .footer-bottom{ flex-direction:column; align-items:flex-start; }
  .media--wide{ aspect-ratio:16/9; }
}
@media (max-width:520px){
  .brand__sub{ display:none; }
  .header-cta{ padding:8px 13px; font-size:11px; }
}

/* ===== 12. reduced motion ===== */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{ animation-duration:.001ms !important; animation-iteration-count:1 !important; transition-duration:.001ms !important; }
  .js [data-reveal]{ opacity:1; transform:none; }
  .card--link:hover{ transform:none; }
  .btn--primary:hover{ transform:none; }
  .to-top{ transform:none; }
}