:root{
  --space:#070D1F;
  --zone:#0E1A38;
  --cyan:#00E5C7;
  --orange:#FF7A3C;
  --electric:#4F8CFF;
  --white:#F2F6FF;
  --mist:#9AA8C7;
  --teal:#0B3B3C;
  --yellow:#F5D547;
  --violet:#1C1740;

  --font-sans:"HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:"JetBrains Mono","SF Mono","Roboto Mono",ui-monospace,Menlo,Consolas,monospace;

  --fs-12:0.75rem;
  --fs-14:0.875rem;
  --fs-16:1rem;
  --fs-20:1.25rem;
  --fs-28:1.75rem;
  --fs-40:2.5rem;
  --fs-64:4rem;

  --shell:1240px;
  --gutter:clamp(1rem,4vw,3rem);
  --header-h:68px;
  --radius-s:8px;
  --radius-m:16px;
  --radius-l:28px;

  --line:rgba(0,229,199,.20);
  --line-soft:rgba(154,168,199,.18);
  --shadow-deep:0 26px 60px -34px rgba(0,0,0,.9);
}

/* ---------- reset ---------- */
*,
*::before,
*::after{box-sizing:border-box;}

html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:calc(var(--header-h) + 24px);
}

body{
  margin:0;
  padding-top:var(--header-h);
  background:var(--space);
  color:var(--white);
  font-family:var(--font-sans);
  font-size:var(--fs-16);
  font-weight:400;
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

html.nav-open{overflow:hidden;}

img,svg,video{display:block;max-width:100%;}
h1,h2,h3,h4,h5{margin:0;font-weight:800;line-height:1.2;letter-spacing:-.01em;}
p{margin:0 0 1em;}
a{color:var(--cyan);text-decoration:none;}
a:hover{color:var(--white);}
ul,ol{margin:0;padding:0;}
button,input,select,textarea{font:inherit;color:inherit;}
hr{border:0;}
::selection{background:var(--cyan);color:#04121A;}

:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:4px;
}

h1{font-size:clamp(2.25rem,6vw,4rem);}
h2{font-size:clamp(1.65rem,3.8vw,2.5rem);}
h3{font-size:clamp(1.2rem,2.4vw,1.75rem);}
h4{font-size:var(--fs-20);}

.mono{font-family:var(--font-mono);letter-spacing:.02em;}
.score{font-family:var(--font-mono);font-weight:700;color:var(--orange);letter-spacing:.02em;}
.divider{height:1px;background:var(--line-soft);border:0;margin:0;}

/* ---------- layout ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.section{padding-block:clamp(2.5rem,6vw,5rem);}
.section--tight{padding-block:clamp(1.5rem,3.5vw,2.5rem);}

.section-head{
  display:flex;
  flex-wrap:wrap;
  align-items:flex-end;
  justify-content:space-between;
  gap:1rem;
  margin-bottom:clamp(1.25rem,3vw,2rem);
}
.section-head__title{font-size:clamp(1.5rem,3.4vw,2.25rem);font-weight:800;}

.eyebrow{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--cyan);
  margin-bottom:.6rem;
}

.grid{display:grid;gap:clamp(1rem,2.4vw,2rem);}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr));}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr));}
.grid--asym{grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:.5rem;
  padding:.8rem 1.4rem;
  border-radius:999px;
  border:1px solid transparent;
  background:transparent;
  font-family:var(--font-sans);
  font-size:var(--fs-14);
  font-weight:700;
  line-height:1.2;
  text-decoration:none;
  cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease;
}
.btn--primary{
  background:var(--orange);
  color:#1A0A02;
  box-shadow:0 14px 34px -18px rgba(255,122,60,.95);
}
.btn--primary:hover{color:#1A0A02;transform:translateY(-2px);}
.btn--ghost{border-color:var(--line);color:var(--white);}
.btn--ghost:hover{border-color:var(--cyan);color:var(--cyan);}
.btn--cyan{background:var(--cyan);color:#04121A;}
.btn--cyan:hover{color:#04121A;transform:translateY(-2px);}

/* ---------- breadcrumb ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.45rem;
  list-style:none;
  margin:0;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.06em;
  color:var(--mist);
}
.breadcrumb li{display:flex;align-items:center;gap:.45rem;}
.breadcrumb li+li::before{content:"/";color:rgba(154,168,199,.5);}
.breadcrumb a{color:var(--mist);}
.breadcrumb a:hover{color:var(--cyan);}
.breadcrumb [aria-current="page"]{color:var(--cyan);}

/* ---------- prose ---------- */
.prose{max-width:72ch;}
.prose p{color:rgba(242,246,255,.86);}
.prose h2{margin:2.2em 0 .6em;}
.prose h3{margin:1.8em 0 .5em;}
.prose ul,.prose ol{padding-left:1.3rem;color:rgba(242,246,255,.86);}
.prose li{margin-bottom:.5em;}
.prose strong{color:var(--white);}
.prose code{font-family:var(--font-mono);font-size:.92em;color:var(--cyan);}

/* ---------- media ---------- */
.media{
  position:relative;
  display:block;
  overflow:hidden;
  border-radius:var(--radius-m);
  aspect-ratio:16/9;
  background:
    radial-gradient(120% 90% at 18% 0%,rgba(79,140,255,.30),transparent 62%),
    radial-gradient(90% 80% at 100% 100%,rgba(255,122,60,.22),transparent 60%),
    linear-gradient(150deg,var(--zone),var(--violet));
}
.media img{width:100%;height:100%;object-fit:cover;}
.media--wide{aspect-ratio:21/9;}
.media--square{aspect-ratio:1/1;}
.media--tall{aspect-ratio:3/4;}
.media__scrim{
  position:absolute;
  inset:0;
  pointer-events:none;
  background:linear-gradient(180deg,rgba(7,13,31,0) 34%,rgba(7,13,31,.86) 100%);
}
.media__tag{
  position:absolute;
  left:1rem;
  bottom:.9rem;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.1em;
  color:var(--white);
}

/* ---------- tags / cards / index ---------- */
.tag{
  display:inline-flex;
  align-items:center;
  gap:.35rem;
  padding:.25rem .62rem;
  border-radius:999px;
  border:1px solid var(--line);
  color:var(--cyan);
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.06em;
}
.tag--orange{border-color:rgba(255,122,60,.48);color:var(--orange);}
.tag--yellow{border-color:rgba(245,213,71,.48);color:var(--yellow);}

.card{
  position:relative;
  overflow:hidden;
  padding:clamp(1rem,2vw,1.5rem);
  border:1px solid var(--line-soft);
  border-radius:var(--radius-m);
  background:var(--zone);
}
.card--teal{background:linear-gradient(160deg,var(--teal),rgba(14,26,56,.92));}
.card__index{
  display:block;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.12em;
  color:var(--orange);
}
.card__title{
  margin:.45rem 0 .5rem;
  font-size:var(--fs-20);
  font-weight:800;
  line-height:1.35;
}
.card__meta{
  display:block;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  color:var(--mist);
  letter-spacing:.06em;
}

.index-list{list-style:none;border-top:1px solid var(--line-soft);}
.index-list li{border-bottom:1px solid var(--line-soft);}
.index-list a{
  display:flex;
  align-items:baseline;
  gap:1rem;
  padding:.85rem .25rem;
  color:var(--white);
  transition:color .2s ease,padding-left .2s ease;
}
.index-list a:hover{color:var(--cyan);padding-left:.6rem;}
.index-list__num{
  flex:none;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  color:var(--cyan);
}
.index-list__meta{
  margin-left:auto;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  color:var(--mist);
}

.aside-note{
  padding:.6rem 0 .6rem 1rem;
  border-left:2px solid var(--cyan);
  color:var(--mist);
  font-size:var(--fs-14);
}

/* ---------- horizontal band ---------- */
.band{
  display:flex;
  flex-wrap:wrap;
  gap:.5rem;
  padding:.8rem 0;
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
}
.band__item{
  padding:.35rem .75rem;
  border-radius:999px;
  border:1px solid var(--line-soft);
  color:var(--mist);
  background:transparent;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.1em;
  text-decoration:none;
  cursor:pointer;
  transition:color .2s ease,border-color .2s ease,background-color .2s ease;
}
.band__item:hover,
.band__item[aria-selected="true"]{
  color:#04121A;
  background:var(--cyan);
  border-color:var(--cyan);
}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;
  top:-120px;
  left:var(--gutter);
  z-index:200;
  padding:.6rem 1rem;
  border-radius:var(--radius-s);
  background:var(--cyan);
  color:#04121A;
  font-weight:700;
  font-size:var(--fs-14);
  text-decoration:none;
  transition:top .2s ease;
}
.skip-link:focus{top:12px;color:#04121A;}

/* ---------- header ---------- */
.site-header{
  position:fixed;
  inset:0 0 auto 0;
  z-index:90;
  background:rgba(7,13,31,.84);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
}
.site-header::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  width:min(34%,320px);
  height:2px;
  background:linear-gradient(90deg,var(--cyan),rgba(0,229,199,0));
}

.header-bar{
  display:flex;
  align-items:center;
  gap:clamp(.6rem,1.6vw,1.5rem);
  min-height:var(--header-h);
  max-width:1680px;
  margin-inline:auto;
  padding-inline:var(--gutter);
}

.brand{
  display:flex;
  align-items:center;
  gap:.7rem;
  flex:0 0 auto;
  color:var(--white);
  text-decoration:none;
}
.brand:hover{color:var(--white);}
.brand__mark{
  position:relative;
  flex:none;
  width:34px;
  height:34px;
  border-radius:12px 4px 12px 4px;
  background:linear-gradient(135deg,var(--cyan),var(--electric) 58%,var(--orange));
  box-shadow:0 0 0 1px rgba(0,229,199,.35),0 10px 24px -14px rgba(0,229,199,.8);
}
.brand__mark::after{
  content:"";
  position:absolute;
  inset:9px;
  border-radius:3px 1px 3px 1px;
  background:var(--space);
}
.brand__text{display:block;min-width:0;}
.brand__name{
  display:block;
  font-size:var(--fs-16);
  font-weight:800;
  line-height:1.25;
  letter-spacing:.02em;
  white-space:nowrap;
}
.brand__sub{
  display:block;
  font-family:var(--font-mono);
  font-size:.62rem;
  line-height:1.2;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--mist);
}

.nav-toggle{
  display:none;
  align-items:center;
  gap:.5rem;
  margin-left:auto;
  padding:.5rem .8rem;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(14,26,56,.7);
  color:var(--white);
  font-size:var(--fs-12);
  font-weight:700;
  cursor:pointer;
}
.nav-toggle__bars{display:grid;gap:4px;width:18px;}
.nav-toggle__bars i{
  display:block;
  height:2px;
  border-radius:2px;
  background:currentColor;
  transition:transform .25s ease,opacity .25s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2){opacity:0;}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
.nav-toggle__label{letter-spacing:.08em;}

.site-nav{min-width:0;}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:clamp(.15rem,1.2vw,1.1rem);
  list-style:none;
}
.site-nav__list a{
  position:relative;
  display:block;
  padding:.55rem .3rem;
  color:var(--mist);
  font-size:var(--fs-14);
  font-weight:600;
  white-space:nowrap;
  text-decoration:none;
  transition:color .2s ease;
}
.site-nav__list a::after{
  content:"";
  position:absolute;
  left:.3rem;
  right:.3rem;
  bottom:.12rem;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .25s ease,background-color .25s ease;
}
.site-nav__list a:hover{color:var(--white);}
.site-nav__list a:hover::after{transform:scaleX(1);}
.site-nav__list a[aria-current="page"]{color:var(--white);}
.site-nav__list a[aria-current="page"]::after{transform:scaleX(1);background:var(--orange);}
.site-nav__list a.is-current{color:var(--cyan);}
.site-nav__list a.is-current::after{transform:scaleX(1);background:var(--cyan);}

.header-tools{
  display:flex;
  align-items:center;
  gap:.5rem;
  margin-left:auto;
  flex:0 0 auto;
}

.round-switch{
  display:flex;
  align-items:center;
  gap:.3rem;
  padding:.2rem .35rem .2rem .65rem;
  border:1px solid var(--line);
  border-radius:999px;
  background:rgba(14,26,56,.75);
}
.round-switch__label{
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  letter-spacing:.12em;
  color:var(--mist);
}
.round-switch__value{
  min-width:2.7em;
  text-align:center;
  font-family:var(--font-mono);
  font-size:var(--fs-14);
  font-weight:700;
  color:var(--cyan);
}
.icon-btn{
  display:grid;
  place-items:center;
  width:26px;
  height:26px;
  border-radius:50%;
  border:1px solid var(--line-soft);
  background:transparent;
  color:var(--white);
  font-family:var(--font-mono);
  font-size:var(--fs-14);
  line-height:1;
  cursor:pointer;
  transition:border-color .2s ease,color .2s ease,background-color .2s ease;
}
.icon-btn:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(0,229,199,.08);}

.screen-toggle{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  padding:.42rem .75rem;
  border-radius:999px;
  border:1px solid var(--line-soft);
  background:transparent;
  color:var(--mist);
  font-size:var(--fs-12);
  font-weight:700;
  cursor:pointer;
  transition:color .2s ease,border-color .2s ease;
}
.screen-toggle__dot{
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--mist);
  box-shadow:0 0 0 3px rgba(154,168,199,.14);
  transition:background-color .25s ease,box-shadow .25s ease;
}
.screen-toggle:hover{color:var(--white);}
.screen-toggle[aria-pressed="true"]{color:var(--cyan);border-color:rgba(0,229,199,.5);}
.screen-toggle[aria-pressed="true"] .screen-toggle__dot{
  background:var(--cyan);
  box-shadow:0 0 12px var(--cyan);
}

.resume-link{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  padding:.42rem .8rem;
  border-radius:999px;
  border:1px solid rgba(255,122,60,.4);
  background:linear-gradient(120deg,rgba(255,122,60,.18),rgba(255,122,60,.03));
  color:var(--white);
  font-size:var(--fs-12);
  font-weight:700;
  text-decoration:none;
}
.resume-link:hover{color:var(--orange);}
.resume-link__badge{
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.08em;
  color:var(--orange);
}

.progress{
  position:absolute;
  left:0;
  right:0;
  bottom:-1px;
  height:2px;
  pointer-events:none;
}
.progress__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--cyan),var(--electric) 56%,var(--orange));
  transition:width .12s linear;
}

/* screen mode */
html[data-screen-mode="on"]{
  --shell:1560px;
  --header-h:84px;
}
html[data-screen-mode="on"] body{font-size:1.0625rem;}
html[data-screen-mode="on"] .site-header{
  background:var(--space);
  backdrop-filter:none;
  -webkit-backdrop-filter:none;
}
html[data-screen-mode="on"] .media{border-radius:var(--radius-l);}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(3rem,8vw,6rem);
  background:var(--zone);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;
  left:var(--gutter);
  width:132px;
  height:2px;
  background:var(--cyan);
}

.footer-grid{
  display:grid;
  grid-template-columns:minmax(230px,1.6fr) repeat(3,minmax(130px,1fr)) minmax(220px,1.4fr);
  gap:clamp(1.5rem,3vw,3rem);
  padding-block:clamp(2.5rem,5vw,4rem) clamp(1.75rem,3vw,2.5rem);
}

.footer-col{min-width:0;}
.footer-col--brand{min-width:0;}

.footer-col__title{
  display:flex;
  align-items:center;
  gap:.5rem;
  margin:0 0 .95rem;
  font-family:var(--font-mono);
  font-size:var(--fs-12);
  font-weight:700;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--mist);
}
.footer-col__title::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:1px;
  background:var(--cyan);
  transform:rotate(45deg);
}

.footer-list{list-style:none;display:grid;gap:.55rem;}
.footer-list a{
  color:rgba(242,246,255,.82);
  font-size:var(--fs-14);
  text-decoration:none;
  transition:color .2s ease;
}
.footer-list a:hover{color:var(--cyan);}

.footer-brand{display:flex;align-items:center;gap:.7rem;margin-bottom:1rem;}
.footer-brand__name{font-size:var(--fs-20);font-weight:800;letter-spacing:.02em;}

.footer-note{
  margin:0;
  max-width:34ch;
  font-size:var(--fs-14);
  line-height:1.85;
  color:var(--mist);
}

.footer-path{
  display:flex;
  flex-wrap:wrap;
  gap:.4rem;
  margin-top:1.1rem;
  list-style:none;
}
.footer-path li{
  padding:.28rem .6rem;
  border:1px solid var(--line-soft);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.08em;
  color:var(--mist);
}

.footer-contact{display:grid;gap:.55rem;margin-top:1rem;}
.footer-contact__row{display:flex;gap:.6rem;align-items:baseline;}
.footer-contact__key{
  flex:none;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.12em;
  color:var(--cyan);
}
.footer-contact__val{
  font-size:var(--fs-14);
  color:var(--mist);
  word-break:break-all;
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:.75rem 1.5rem;
  padding-block:1.25rem 1.75rem;
  border-top:1px solid var(--line-soft);
  font-size:var(--fs-12);
  color:var(--mist);
}
.footer-copy{margin:0;}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.5rem 1.1rem;
}
.footer-legal a{color:var(--mist);}
.footer-legal a:hover{color:var(--cyan);}

/* ---------- reveal ---------- */
html[data-reveal-ready] [data-reveal]{
  opacity:0;
  transform:translateY(18px);
}
html[data-reveal-ready] [data-reveal].is-in{
  opacity:1;
  transform:none;
  transition:opacity .65s cubic-bezier(.22,.61,.36,1),transform .65s cubic-bezier(.22,.61,.36,1);
}

/* ---------- responsive ---------- */
@media (max-width:1120px){
  .footer-grid{grid-template-columns:minmax(220px,1.5fr) repeat(2,minmax(130px,1fr));}
  .footer-col--brand{grid-column:1/-1;}
  .footer-contact{grid-column:1/-1;}
}

@media (max-width:940px){
  .nav-toggle{display:inline-flex;}
  .site-nav{
    position:fixed;
    top:var(--header-h);
    left:0;
    right:0;
    max-height:calc(100vh - var(--header-h));
    overflow-y:auto;
    padding:.6rem var(--gutter) 1.6rem;
    background:var(--zone);
    border-bottom:1px solid var(--line);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .22s ease,transform .22s ease,visibility .22s;
  }
  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .site-nav__list{flex-direction:column;align-items:stretch;gap:0;}
  .site-nav__list a{
    position:relative;
    padding:.9rem .25rem .9rem 1.1rem;
    border-bottom:1px solid var(--line-soft);
    font-size:var(--fs-16);
  }
  .site-nav__list a::after{display:none;}
  .site-nav__list a[aria-current="page"]{color:var(--cyan);}
  .site-nav__list a[aria-current="page"]::before,
  .site-nav__list a.is-current::before{
    content:"";
    position:absolute;
    left:0;
    top:50%;
    width:3px;
    height:18px;
    border-radius:2px;
    background:var(--orange);
    transform:translateY(-50%);
  }
  .site-nav__list a.is-current{color:var(--cyan);}
  .site-nav__list a.is-current::before{background:var(--cyan);}
  .site-nav__list li:last-child a{border-bottom:0;}
}

@media (max-width:900px){
  .grid--2,
  .grid--3,
  .grid--asym{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:720px){
  .screen-toggle .screen-toggle__text{display:none;}
  .screen-toggle{padding:.42rem .5rem;}
  .round-switch{padding-left:.5rem;}
  .round-switch__label{display:none;}
  .resume-link__text{display:none;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

@media (max-width:560px){
  .brand__sub{display:none;}
  .resume-link{display:none;}
  .round-switch__value{min-width:2.3em;}
  .nav-toggle__label{display:none;}
  .section-head{flex-direction:column;align-items:flex-start;}
}

@media (prefers-reduced-motion:reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html{scroll-behavior:auto;}
  html[data-reveal-ready] [data-reveal]{opacity:1;transform:none;}
  .progress__bar{transition:none;}
}