@font-face {
  font-family: "Smiley Sans";
  src: url("assets/fonts/smiley-sans-display.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 900;
  font-display: swap;
}

:root {
  --bone: #f2efe8;
  --paper: #fbfaf6;
  --carbon: #07111d;
  --carbon-soft: #24303c;
  --steel: #aab4bd;
  --line: #b9c1c7;
  --cobalt: #1557d5;
  --cobalt-dark: #0b3895;
  --cyan: #44c8e7;
  --display: "Smiley Sans", "Arial Narrow", sans-serif;
  --body: "Noto Sans SC", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
  --header-h: 74px;
  --page-pad: clamp(20px, 4vw, 72px);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 18px);
}

body {
  margin: 0;
  background: var(--bone);
  color: var(--carbon);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

body.menu-open { overflow: hidden; }
::selection { background: var(--cobalt); color: #fff; }
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bone); }
::-webkit-scrollbar-thumb { background: var(--cobalt); border: 2px solid var(--bone); }

img { display: block; width: 100%; height: auto; }
a { color: inherit; text-underline-offset: .24em; text-decoration-thickness: 1px; }
button, input, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

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

.skip-link {
  position: fixed;
  left: 18px;
  top: 12px;
  z-index: 1000;
  padding: 10px 14px;
  background: var(--paper);
  color: var(--carbon);
  transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 0 var(--page-pad);
  color: #fff;
  border-bottom: 1px solid rgb(255 255 255 / .28);
  transition: background-color .24s ease, color .24s ease, box-shadow .24s ease;
}

.site-header.is-scrolled {
  background: rgb(242 239 232 / .96);
  color: var(--carbon);
  box-shadow: 0 12px 32px rgb(7 17 29 / .12);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  font-family: var(--display);
  font-size: clamp(15px, 1.5vw, 20px);
  line-height: 1.2;
  text-decoration: none;
}
.brand-mark { width: 42px; height: 42px; flex: 0 0 auto; }

.site-nav { display: flex; align-items: center; gap: clamp(16px, 2.4vw, 34px); }
.site-nav a { min-height: 44px; display: inline-flex; align-items: center; text-decoration: none; font-size: 14px; }
.site-nav a:not(.nav-action):hover { text-decoration: underline; }
.nav-action { padding: 0 18px; border: 1px solid currentColor; }
.nav-action:hover { background: var(--cobalt); border-color: var(--cobalt); color: #fff; }

.menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 1px solid currentColor;
  background: transparent;
  color: inherit;
}
.menu-toggle svg { width: 28px; fill: none; stroke: currentColor; stroke-width: 2; }

.hero {
  position: relative;
  min-height: 100svh;
  background: var(--carbon);
  color: #fff;
  overflow: hidden;
}
.hero-image { position: absolute; inset: 0; height: 100%; object-fit: cover; object-position: center; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgb(7 17 29 / .88) 0%, rgb(7 17 29 / .18) 47%, rgb(7 17 29 / .42) 100%); }
.hero-copy {
  position: relative;
  z-index: 3;
  width: min(670px, 54vw);
  padding: clamp(144px, 20vh, 220px) 0 92px var(--page-pad);
}
.hero h1, h2, h3 { font-family: var(--display); font-weight: 700; margin: 0; }
.hero h1 { font-size: clamp(54px, 7.4vw, 96px); line-height: .98; letter-spacing: -.03em; }
.hero h1 span { display: block; white-space: nowrap; }
.hero-copy > p { max-width: 38em; margin: 28px 0 0; color: #e2e8f0; font-size: clamp(17px, 1.5vw, 21px); }
.hero-actions { display: flex; align-items: center; gap: 24px; margin-top: 36px; }
.primary-action {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  gap: 28px;
  padding: 0 20px;
  background: var(--cobalt);
  color: #fff;
  text-decoration: none;
  box-shadow: 0 14px 34px rgb(3 25 70 / .28);
}
.primary-action:hover { background: #2368ef; }
.text-action { min-height: 48px; display: inline-flex; align-items: center; color: #fff; }
.hero-axis {
  position: absolute;
  z-index: 4;
  right: var(--page-pad);
  bottom: 32px;
  display: flex;
  gap: 28px;
  margin: 0;
  font-size: 12px;
  letter-spacing: .12em;
  color: #e8f3ff;
}
.hero-register { position: absolute; z-index: 2; left: 0; right: 0; bottom: 82px; height: 1px; background: rgb(255 255 255 / .42); }
.hero-register span { display: block; width: 18vw; height: 3px; margin-top: -1px; background: var(--cyan); transform: translateX(-20vw); animation: register-sweep 1.8s cubic-bezier(.16, 1, .3, 1) .35s forwards; box-shadow: 0 0 22px rgb(68 200 231 / .72); }
@keyframes register-sweep { to { transform: translateX(100vw); } }

.identity-band {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
  min-height: 760px;
  background: var(--paper);
}
.identity-copy { align-self: center; padding: 96px var(--page-pad); }
.identity-copy h2, .range-heading h2, .workflow-intro h2, .development h2, .project h2, .contact h2 {
  font-size: clamp(40px, 5vw, 76px);
  line-height: 1.05;
  letter-spacing: -.025em;
  text-wrap: balance;
}
.identity-copy p, .range-heading p, .workflow-intro p, .development-title p, .project-copy > p, .contact-copy > p { max-width: 42em; margin: 28px 0 0; color: var(--carbon-soft); font-size: clamp(17px, 1.4vw, 20px); }
.cell-field { position: relative; margin: 0; min-height: 680px; background: var(--carbon); overflow: hidden; }
.cell-field img { height: 100%; object-fit: cover; }
.cell-field figcaption { position: absolute; left: 24px; bottom: 22px; color: #fff; font-size: 12px; letter-spacing: .08em; }

.cylinder-range { padding: 120px var(--page-pad) 0; background: var(--bone); }
.range-heading { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr); align-items: end; gap: 64px; margin-bottom: 58px; }
.range-heading p { margin: 0; }
.cylinder-range figure { margin: 0 calc(var(--page-pad) * -1); overflow: hidden; }
.cylinder-range figure img { height: clamp(420px, 58vw, 780px); object-fit: cover; }

.workflow { padding: 128px 0; background: var(--carbon); color: #fff; }
.workflow-intro { display: grid; grid-template-columns: 1fr .65fr; gap: 60px; align-items: end; padding: 0 var(--page-pad) 64px; }
.workflow-intro p { margin: 0; color: #c9d3dc; }
.process-track { list-style: none; margin: 0; padding: 0; border-top: 1px solid #33404d; }
.process-track li { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr); min-height: 520px; border-bottom: 1px solid #33404d; }
.process-track li:nth-child(even) { grid-template-columns: minmax(300px, .65fr) minmax(0, 1.35fr); }
.process-track li:nth-child(even) figure { order: 2; }
.process-track figure { margin: 0; overflow: hidden; }
.process-track img { height: 100%; object-fit: cover; }
.process-track li > div { display: flex; flex-direction: column; justify-content: center; padding: 64px var(--page-pad); }
.process-track span { font-family: var(--display); color: var(--cyan); font-size: 28px; font-variant-numeric: tabular-nums; }
.process-track h3 { margin-top: 18px; font-size: clamp(36px, 4vw, 62px); line-height: 1.05; }
.process-track p { max-width: 30em; margin: 24px 0 0; color: #cbd5df; font-size: 17px; }

.development { padding: 128px var(--page-pad); background: var(--paper); }
.development-title { display: grid; grid-template-columns: 1fr .8fr; align-items: end; gap: 64px; }
.development-title p { margin: 0; }
.timeline { margin-top: 74px; border-top: 2px solid var(--carbon); }
.timeline article { display: grid; grid-template-columns: minmax(140px, .3fr) 1fr; gap: 40px; padding: 26px 0; border-bottom: 1px solid var(--line); }
.timeline time { font-family: var(--display); font-size: clamp(28px, 4vw, 50px); font-variant-numeric: tabular-nums; }
.timeline p { margin: 8px 0 0; font-size: 18px; }
.timeline .planned { color: var(--cobalt-dark); }

.project { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(340px, .8fr); min-height: 740px; background: var(--cobalt); color: #fff; }
.project figure { margin: 0; min-height: 520px; overflow: hidden; }
.project img { height: 100%; object-fit: cover; }
.project-copy { align-self: center; padding: 80px var(--page-pad); }
.project-copy > p { color: #edf4ff; }
.project-boundary { padding-top: 24px; border-top: 1px solid rgb(255 255 255 / .42); font-size: 15px !important; }

.contact { display: grid; grid-template-columns: minmax(0, 1fr) minmax(380px, .7fr); gap: 90px; padding: 128px var(--page-pad); background: var(--bone); }
.contact-copy dl { margin: 56px 0 0; border-top: 1px solid var(--carbon); }
.contact-copy dl > div { display: grid; grid-template-columns: 110px 1fr; gap: 24px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.contact-copy dt { color: #4c5964; }
.contact-copy dd { margin: 0; }
.contact-form { align-self: start; padding: 38px; background: var(--carbon); color: #fff; box-shadow: 0 24px 48px rgb(7 17 29 / .16); }
.contact-form label { display: block; margin-bottom: 22px; }
.contact-form input, .contact-form textarea {
  width: 100%;
  margin-top: 8px;
  border: 1px solid #64707b;
  border-radius: 0;
  background: #0d1a27;
  color: #fff;
  padding: 13px 14px;
  caret-color: var(--cyan);
}
.contact-form input { min-height: 48px; }
.contact-form textarea { resize: vertical; }
.contact-form small { display: block; margin-top: 6px; color: #bdc9d3; }
.contact-form button { width: 100%; min-height: 52px; border: 0; background: var(--cobalt); color: #fff; cursor: pointer; }
.contact-form button:hover { background: #2368ef; }
.contact-form button:disabled { background: #5c6a77; cursor: not-allowed; }
.contact-form [aria-invalid="true"] { border-color: #ff7c83; }
.form-result { min-height: 2.8em; margin: 18px 0 0; color: #ccefff; }

.site-footer {
  display: grid;
  grid-template-columns: 1.4fr .65fr .95fr;
  gap: 42px;
  align-items: center;
  padding: 36px var(--page-pad);
  background: var(--carbon);
  color: #c7d1da;
  font-size: 13px;
}
.footer-brand { display: flex; align-items: center; gap: 12px; color: #fff; }
.footer-brand p { margin: 0; }
.footer-brand strong, .footer-brand span { display: block; }
.site-footer > p { margin: 0; }

@media (max-width: 980px) {
  .menu-toggle { display: inline-grid; place-items: center; }
  .site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto;
    display: grid;
    gap: 0;
    padding: 16px var(--page-pad) 26px;
    background: var(--bone);
    color: var(--carbon);
    box-shadow: 0 20px 34px rgb(7 17 29 / .18);
    transform: translateY(-130%);
    visibility: hidden;
    transition: transform .24s cubic-bezier(.16, 1, .3, 1), visibility .24s;
  }
  .site-nav.is-open { transform: translateY(0); visibility: visible; }
  .site-nav a { min-height: 52px; border-bottom: 1px solid var(--line); }
  .site-nav .nav-action { margin-top: 14px; justify-content: center; border: 1px solid var(--carbon); }
  .hero-copy { width: min(700px, 84vw); }
  .identity-band, .project, .contact { grid-template-columns: 1fr; }
  .identity-copy { padding-top: 108px; padding-bottom: 72px; }
  .cell-field { min-height: 560px; }
  .range-heading, .workflow-intro, .development-title { grid-template-columns: 1fr; gap: 28px; }
  .process-track li, .process-track li:nth-child(even) { grid-template-columns: 1fr; }
  .process-track li:nth-child(even) figure { order: 0; }
  .process-track figure { min-height: 480px; }
  .project figure { min-height: 560px; }
  .contact { gap: 60px; }
  .site-footer { grid-template-columns: 1fr 1fr; }
  .site-footer > p:last-child { grid-column: 1 / -1; }
}

@media (max-width: 620px) {
  :root { --header-h: 66px; }
  .site-header { padding-inline: 16px; }
  .brand { max-width: calc(100vw - 92px); font-size: 14px; }
  .brand-mark { width: 36px; height: 36px; }
  .hero { min-height: 780px; }
  .hero-image { object-position: 63% center; }
  .hero-shade { background: linear-gradient(180deg, rgb(7 17 29 / .76) 0%, rgb(7 17 29 / .48) 42%, rgb(7 17 29 / .9) 100%); }
  .hero-copy { width: auto; padding: 126px 20px 150px; }
  .hero h1 { font-size: clamp(48px, 13vw, 58px); }
  .hero-copy > p { font-size: 17px; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 12px; }
  .primary-action { justify-content: space-between; }
  .text-action { justify-content: center; }
  .hero-axis { left: 20px; right: 20px; bottom: 30px; gap: 0; justify-content: space-between; font-size: 10px; }
  .hero-register { bottom: 70px; }
  .identity-copy, .range-heading, .workflow-intro, .development, .project-copy, .contact { padding-left: 20px; padding-right: 20px; }
  .identity-copy h2, .range-heading h2, .workflow-intro h2, .development h2, .project h2, .contact h2 { font-size: clamp(38px, 12vw, 54px); }
  .cell-field { min-height: 500px; }
  .cylinder-range { padding: 90px 20px 0; }
  .cylinder-range figure { margin-inline: -20px; }
  .cylinder-range figure img { height: 420px; object-position: 42% center; }
  .workflow { padding: 96px 0; }
  .process-track figure { min-height: 320px; }
  .process-track li > div { padding: 44px 20px 64px; }
  .development { padding-top: 96px; padding-bottom: 96px; }
  .timeline article { grid-template-columns: 1fr; gap: 0; }
  .timeline p { margin-top: 0; }
  .project figure { min-height: 390px; }
  .project img { object-position: 34% center; }
  .project-copy { padding-top: 70px; padding-bottom: 80px; }
  .contact { padding-top: 96px; padding-bottom: 96px; }
  .contact-copy dl > div { grid-template-columns: 1fr; gap: 2px; }
  .contact-form { padding: 26px 20px; margin-inline: -4px; }
  .site-footer { grid-template-columns: 1fr; gap: 22px; padding: 34px 20px; }
  .site-footer > p:last-child { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .hero-register span { transform: translateX(100vw); }
}