*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd{margin:0}
ul[class],ol[class]{list-style:none;padding:0}
img,svg{max-width:100%}
button{font:inherit;color:inherit}
a{color:inherit}

:root{
  --c-ink-900:#052A38;
  --c-ink-700:#0B4A63;
  --c-sea-500:#127C8C;
  --c-sea-300:#6FC3C7;
  --c-coral-500:#FF6B3D;
  --c-coral-300:#FFA07A;
  --c-sand:#E8C07A;
  --c-mist:#F6FBF9;
  --c-text:#102A33;
  --c-grid:rgba(11,74,99,.14);
  --c-grid-soft:rgba(11,74,99,.08);
  --rail-w:92px;
  --topbar-h:62px;
  --shell-max:1240px;
  --gutter:clamp(20px,4vw,64px);
  --font-display:"HarmonyOS Sans SC","Source Han Sans SC","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","HarmonyOS Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","IBM Plex Mono","JetBrains Mono",Menlo,Consolas,"Courier New",monospace;
  --e:cubic-bezier(.2,.7,.3,1);
  --shadow-1:0 1px 0 rgba(11,74,99,.05),0 14px 30px -26px rgba(5,42,56,.6);
}

body{
  min-height:100vh;
  padding-left:var(--rail-w);
  background-color:var(--c-mist);
  background-image:
    linear-gradient(to right,var(--c-grid) 1px,transparent 1px),
    linear-gradient(to bottom,var(--c-grid) 1px,transparent 1px);
  background-size:104px 104px;
  background-position:-1px -1px;
  color:var(--c-text);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.9;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
body.is-nav-open{overflow:hidden}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:800;line-height:1.15;letter-spacing:-.02em;color:var(--c-ink-700);text-wrap:balance}

:focus-visible{outline:2px solid var(--c-coral-500);outline-offset:3px;border-radius:3px}

/* ---------- utilities ---------- */
.shell{width:min(calc(100% - var(--gutter) * 2),var(--shell-max));margin-inline:auto}
.section{padding-block:clamp(44px,7vw,96px)}
.hairline{height:1px;border:0;margin:0;background:var(--c-grid)}
.display{font-family:var(--font-display);font-weight:900;font-size:clamp(48px,8vw,120px);line-height:.95;letter-spacing:-.04em;color:var(--c-ink-900)}
.section-title{font-family:var(--font-display);font-weight:800;font-size:clamp(28px,3vw,44px);line-height:1.15;letter-spacing:-.025em;color:var(--c-ink-700)}
.lede{font-size:clamp(17px,1.6vw,20px);line-height:1.85;color:var(--c-ink-700);max-width:38em}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--c-sea-500)}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--c-sand)}
.eyebrow__num{color:var(--c-sand);letter-spacing:.1em}
.prose{max-width:720px;font-size:17px;line-height:1.9;color:var(--c-text)}
.prose > * + *{margin-top:1.05em}
.prose h2{font-size:clamp(22px,2.2vw,30px);margin-top:2em;color:var(--c-ink-700)}
.prose h3{font-size:19px;margin-top:1.6em;color:var(--c-ink-700)}
.prose ul,.prose ol{padding-left:1.25em}
.prose li + li{margin-top:.4em}
.prose a{color:var(--c-sea-500);text-decoration:underline;text-underline-offset:3px}
.prose strong{font-weight:800;color:var(--c-ink-700)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 26px;border:1px solid transparent;border-radius:999px;font-family:var(--font-display);font-size:16px;font-weight:800;letter-spacing:.01em;text-decoration:none;cursor:pointer;transition:transform .2s var(--e),background-color .2s var(--e),border-color .2s var(--e),color .2s var(--e),box-shadow .2s var(--e)}
.btn:hover{transform:translateY(-2px)}
.btn--coral{background:var(--c-coral-500);color:var(--c-ink-900);box-shadow:0 12px 26px -18px rgba(255,107,61,.95)}
.btn--coral:hover{background:var(--c-coral-300)}
.btn--ghost{background:transparent;color:var(--c-ink-700);border-color:var(--c-sea-300)}
.btn--ghost:hover{border-color:var(--c-sea-500);color:var(--c-sea-500)}

/* ---------- surfaces ---------- */
.card{position:relative;background:#fff;border:1px solid var(--c-grid);border-radius:16px;padding:clamp(20px,2.4vw,30px);box-shadow:var(--shadow-1);transition:transform .24s var(--e),border-color .24s var(--e),box-shadow .24s var(--e)}
.card:hover{transform:translateY(-2px);border-color:rgba(18,124,140,.42);box-shadow:0 20px 42px -32px rgba(5,42,56,.75)}
.tag{display:inline-flex;align-items:center;gap:6px;min-height:28px;padding:0 10px;border-radius:6px;background:rgba(111,195,199,.24);color:var(--c-ink-700);font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;text-decoration:none;transition:background-color .2s var(--e),color .2s var(--e)}
.tag:hover{background:rgba(255,107,61,.2);color:var(--c-ink-900)}

.media{position:relative;display:block;overflow:hidden;border:1px solid var(--c-grid);border-radius:16px;background:linear-gradient(135deg,rgba(111,195,199,.38),rgba(232,192,122,.24) 55%,rgba(255,160,122,.3));aspect-ratio:16/10}
.media::after{content:"";position:absolute;inset:0;background-image:linear-gradient(to right,var(--c-grid-soft) 1px,transparent 1px),linear-gradient(to bottom,var(--c-grid-soft) 1px,transparent 1px);background-size:34px 34px;pointer-events:none}
.media > img{position:relative;z-index:1;display:block;width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:4/5}
.media__caption{margin-top:10px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--c-ink-700)}

.grid{display:grid;gap:clamp(16px,2vw,28px)}
.grid--12{grid-template-columns:repeat(12,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}

.crumbs{margin:0 0 28px;font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:var(--c-ink-700)}
.crumbs__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumbs__item{display:inline-flex;align-items:center;gap:8px}
.crumbs__item + .crumbs__item::before{content:"/";color:var(--c-sea-300)}
.crumbs a{text-decoration:none;border-bottom:1px solid transparent;transition:border-color .2s var(--e),color .2s var(--e)}
.crumbs a:hover{border-color:var(--c-sea-500);color:var(--c-sea-500)}
.crumbs__item[aria-current="page"]{color:var(--c-sea-500)}

/* ---------- skip link ---------- */
.skip-link{position:fixed;top:10px;left:calc(var(--rail-w) + 16px);z-index:200;padding:10px 18px;border-radius:999px;background:var(--c-coral-500);color:var(--c-ink-900);font-family:var(--font-display);font-size:14px;font-weight:800;text-decoration:none;transform:translateY(-180%);transition:transform .22s var(--e)}
.skip-link:focus{transform:none}

/* ---------- header shell ---------- */
.site-header{position:static}

/* ---------- side rail ---------- */
.rail{position:fixed;inset:0 auto 0 0;z-index:90;width:var(--rail-w);display:flex;flex-direction:column;align-items:center;justify-content:space-between;gap:18px;padding:22px 0 20px;background:var(--c-ink-900);color:#E7F3F2;border-right:1px solid rgba(111,195,199,.22);box-shadow:inset -1px 0 0 rgba(5,42,56,.6)}
.rail::before{content:"";position:absolute;inset:0 0 auto 0;height:3px;background:linear-gradient(90deg,var(--c-coral-500),var(--c-sand))}
.rail__brand{display:flex;flex-direction:column;align-items:center;gap:8px;text-decoration:none;color:#fff}
.rail__mark{writing-mode:vertical-rl;text-orientation:mixed;font-family:var(--font-display);font-size:20px;font-weight:900;line-height:1;letter-spacing:.08em}
.rail__sub{writing-mode:vertical-rl;text-orientation:mixed;font-family:var(--font-mono);font-size:10px;line-height:1;letter-spacing:.24em;color:var(--c-sea-300)}
.rail__nav{flex:1 1 auto;min-height:0;display:flex;align-items:center;justify-content:center;overflow-y:auto;padding-block:12px;scrollbar-width:none}
.rail__nav::-webkit-scrollbar{display:none}
.rail__list{display:flex;flex-direction:column;align-items:center;gap:2px}
.rail__item{display:flex;justify-content:center;width:100%}
.rail__link{position:relative;display:block;writing-mode:vertical-rl;text-orientation:mixed;padding:10px 6px;font-size:13px;line-height:1;letter-spacing:.16em;color:rgba(231,243,242,.68);text-decoration:none;transition:color .2s var(--e)}
.rail__link:hover{color:#fff}
.rail__link[aria-current="page"]{color:#fff}
.rail__link[aria-current="page"]::before{content:"";position:absolute;left:-7px;top:6px;bottom:6px;width:2px;border-radius:2px;background:var(--c-coral-500)}
.rail__tail{display:flex;flex-direction:column;align-items:center;gap:8px}
.rail__readout{writing-mode:vertical-rl;text-orientation:mixed;max-height:124px;overflow:hidden;font-family:var(--font-mono);font-size:11px;line-height:1.4;letter-spacing:.18em;color:var(--c-sea-300);transition:color .3s var(--e)}
.rail__readout.is-live{color:var(--c-sand)}
.rail__cta{display:block;writing-mode:vertical-rl;text-orientation:mixed;padding:16px 8px;border-radius:999px;background:var(--c-coral-500);color:var(--c-ink-900);font-family:var(--font-display);font-size:13px;font-weight:800;letter-spacing:.14em;text-decoration:none;transition:background-color .2s var(--e),transform .2s var(--e)}
.rail__cta:hover{background:var(--c-coral-300);transform:translateY(-2px)}

/* ---------- mobile top bar ---------- */
.topbar{display:none;align-items:center;justify-content:space-between;gap:16px;height:var(--topbar-h);padding:0 18px;background:rgba(5,42,56,.97);border-bottom:1px solid rgba(111,195,199,.24)}
.topbar__brand{display:inline-flex;align-items:baseline;gap:8px;text-decoration:none;color:#fff}
.topbar__mark{font-family:var(--font-display);font-size:20px;font-weight:900;letter-spacing:-.02em}
.topbar__sub{font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;color:var(--c-sea-300)}
.nav-toggle{display:inline-flex;align-items:center;gap:10px;min-height:44px;padding:0 16px;border:1px solid rgba(111,195,199,.42);border-radius:999px;background:transparent;color:#EAF6F5;font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;cursor:pointer;transition:border-color .2s var(--e),color .2s var(--e)}
.nav-toggle:hover{border-color:var(--c-coral-300);color:var(--c-coral-300)}
.nav-toggle__icon{display:grid;gap:5px;width:16px}
.nav-toggle__icon span{display:block;height:2px;width:100%;background:currentColor;transition:transform .24s var(--e)}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:first-child{transform:translateY(3.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__icon span:last-child{transform:translateY(-3.5px) rotate(-45deg)}
.nav-toggle__text{white-space:nowrap}

/* ---------- drawer ---------- */
.drawer{position:fixed;inset:var(--topbar-h) 0 0 0;z-index:80;display:flex;flex-direction:column;gap:26px;padding:24px 20px 34px;overflow-y:auto;background:var(--c-ink-900);background-image:linear-gradient(to right,rgba(111,195,199,.12) 1px,transparent 1px),linear-gradient(to bottom,rgba(111,195,199,.12) 1px,transparent 1px);background-size:64px 64px;color:#EAF6F5;opacity:0;visibility:hidden;transform:translateY(-10px);transition:opacity .28s var(--e),transform .28s var(--e),visibility .28s var(--e)}
[data-drawer][data-open]{opacity:1;visibility:visible;transform:none}
.drawer__nav{display:block}
.drawer__group + .drawer__group{margin-top:24px}
.drawer__group-title{margin:0 0 6px;font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;color:var(--c-sand)}
.drawer__list{display:block}
.drawer__link{display:flex;align-items:center;gap:14px;min-height:52px;padding:0 4px;border-bottom:1px solid rgba(111,195,199,.16);text-decoration:none;color:#EAF6F5;font-size:16px;transition:color .2s var(--e),background-color .2s var(--e)}
.drawer__link:hover{color:#fff;background:rgba(111,195,199,.1)}
.drawer__link[aria-current="page"]{color:var(--c-coral-300)}
.drawer__idx{width:22px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--c-sea-300)}
.drawer__link[aria-current="page"] .drawer__idx{color:var(--c-coral-300)}
.drawer__foot{margin-top:auto;display:grid;gap:14px;padding-top:22px;border-top:1px solid rgba(111,195,199,.22)}
.drawer__foot .btn{width:100%}
.drawer__hint{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:rgba(207,230,230,.7)}

/* ---------- scroll progress ---------- */
.scroll-progress{position:fixed;top:0;left:var(--rail-w);right:0;z-index:130;height:3px;background:rgba(18,124,140,.16);pointer-events:none}
.scroll-progress__bar{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--c-sea-300),var(--c-coral-300) 62%,var(--c-coral-500));transition:width .1s linear}

/* ---------- footer ---------- */
.site-footer{position:relative;margin-top:clamp(56px,9vw,128px);overflow:hidden;background:var(--c-ink-900);color:#CFE6E6;border-top:2px solid var(--c-coral-500)}
.site-footer::before{content:"";position:absolute;inset:0;background-image:linear-gradient(to right,rgba(111,195,199,.1) 1px,transparent 1px),linear-gradient(to bottom,rgba(111,195,199,.1) 1px,transparent 1px);background-size:72px 72px;pointer-events:none}
.site-footer::after{content:"";position:absolute;inset:0;background:linear-gradient(118deg,rgba(18,124,140,.34),transparent 52%);pointer-events:none}
.footer__inner{position:relative;z-index:1;width:min(calc(100% - var(--gutter) * 2),var(--shell-max));margin-inline:auto;display:grid;grid-template-columns:1.5fr .7fr .7fr .7fr;gap:clamp(24px,4vw,56px);padding:clamp(40px,6vw,72px) 0 0}
.footer__brand{min-width:0}
.footer__logo{display:inline-block;font-family:var(--font-display);font-size:34px;font-weight:900;letter-spacing:-.03em;line-height:1.1;color:#fff;text-decoration:none}
.footer__logo:hover{color:var(--c-coral-300)}
.footer__tagline{margin-top:8px;font-family:var(--font-mono);font-size:12px;letter-spacing:.2em;color:var(--c-sand)}
.footer__note{margin-top:16px;max-width:30em;font-size:14px;line-height:1.8;color:rgba(207,230,230,.72)}
.footer__col{min-width:0}
.footer__title{margin:0 0 14px;font-family:var(--font-mono);font-size:12px;font-weight:400;letter-spacing:.2em;line-height:1.4;color:var(--c-sea-300)}
.footer__list{display:grid;gap:6px}
.footer__list a{display:inline-block;padding:4px 0;font-size:15px;text-decoration:none;color:rgba(207,230,230,.86);border-bottom:1px solid transparent;transition:color .2s var(--e),border-color .2s var(--e)}
.footer__list a:hover{color:var(--c-coral-300);border-color:rgba(255,160,122,.5)}
.footer__contact{grid-column:1 / -1;margin-top:clamp(20px,3vw,34px);padding-top:24px;border-top:1px solid rgba(111,195,199,.22)}
.footer__contact-list{display:flex;flex-wrap:wrap;gap:12px 44px}
.footer__contact-item{display:flex;align-items:baseline;gap:10px;font-size:14px;line-height:1.7}
.footer__k{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--c-sand);white-space:nowrap}
.footer__v{color:#EAF6F5;word-break:break-word}
.footer__base{position:relative;z-index:1;width:min(calc(100% - var(--gutter) * 2),var(--shell-max));margin:clamp(26px,4vw,44px) auto 0;padding:18px 0 26px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;border-top:1px solid rgba(111,195,199,.22);font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:rgba(207,230,230,.66)}
.footer__legal{color:rgba(207,230,230,.8)}
.footer__meta{color:rgba(207,230,230,.58)}

/* ---------- reveal ---------- */
.js [data-reveal]{opacity:0;transform:translateY(14px);transition:opacity .6s var(--e),transform .6s var(--e)}
.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  body{padding-left:0;background-size:72px 72px}
  .site-header{position:sticky;top:0;z-index:95}
  .rail{display:none}
  .topbar{display:flex}
  .scroll-progress{left:0;top:var(--topbar-h)}
  .skip-link{left:16px}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--12{grid-template-columns:repeat(6,minmax(0,1fr))}
  .footer__inner{grid-template-columns:1fr 1fr;gap:32px}
  .footer__brand{grid-column:1 / -1}
}
@media (min-width:1024px){
  .drawer{display:none}
}
@media (max-width:639px){
  body{font-size:16px;line-height:1.85}
  .grid--3,.grid--12{grid-template-columns:minmax(0,1fr)}
  .footer__inner{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer__contact-list{flex-direction:column;gap:10px}
  .footer__base{flex-direction:column;align-items:flex-start;gap:8px}
  .btn{width:100%}
  .display{font-size:clamp(40px,13vw,64px)}
}

@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 !important;transform:none !important}
  .rail__cta:hover,.card:hover,.btn:hover{transform:none}
}