/* Hallmark · macrostructure: Feature Stack · tone: technical, restrained, credible
 * theme: Cobalt industrial (locked system) · nav: N5 Floating pill · footer: Ft1 Mast-headed
 * enrichment: existing factory image + disclosed reference renderings · pre-emit critique: P5 H5 E5 S5 R5 V4
 */
:root {
  --color-paper: oklch(0.985 0.004 252);
  --color-surface: oklch(0.958 0.011 251);
  --color-ink: oklch(0.22 0.034 255);
  --color-text: oklch(0.36 0.027 255);
  --color-muted: oklch(0.52 0.024 255);
  --color-blue: oklch(0.45 0.16 258);
  --color-blue-deep: oklch(0.32 0.12 258);
  --color-orange: oklch(0.68 0.17 52);
  --color-rule: oklch(0.86 0.016 252);
  --color-focus: oklch(0.51 0.18 258);
  --font-display: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  --font-ja: "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  --radius-sm: 0.5rem;
  --radius-md: 0.875rem;
  --radius-pill: 999px;
  --rule: 1px;
  --dur-short: 160ms;
  --dur-medium: 240ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.7, 0, 0.84, 1);
}

* { box-sizing: border-box; }
html, body { overflow-x: clip; }
html { scroll-behavior: smooth; background: var(--color-paper); }
body { margin: 0; background: var(--color-paper); color: var(--color-text); font-family: var(--font-body); font-size: 17px; line-height: 1.78; }
body[data-locale="en"] { font-family: Arial, Helvetica, sans-serif; }
body[data-locale="ja"] { font-family: var(--font-ja); }
a { color: inherit; }
img { display: block; max-width: 100%; }
h1, h2, h3, p { margin-top: 0; }
h1 em { font-style: normal; color: var(--color-blue); }
h1, h2, h3 { color: var(--color-ink); font-family: var(--font-display); font-style: normal; line-height: 1.16; letter-spacing: -0.045em; overflow-wrap: anywhere; min-width: 0; }
body[data-locale="zh"] h1, body[data-locale="zh"] h2, body[data-locale="zh"] h3, body[data-locale="ja"] h1, body[data-locale="ja"] h2, body[data-locale="ja"] h3 { font-family: inherit; letter-spacing: -0.035em; line-break: strict; }
h1 { font-size: clamp(2.55rem, 8.5vw, 6.25rem); margin-bottom: var(--space-6); }
h2 { font-size: clamp(1.85rem, 4.5vw, 3.8rem); margin-bottom: var(--space-6); }
h3 { font-size: 1.25rem; margin-bottom: var(--space-3); }
p { margin-bottom: var(--space-5); }
.wrap { width: min(100% - 2rem, 76rem); margin-inline: auto; }
.skip { position: absolute; inset-inline-start: var(--space-4); inset-block-start: -5rem; background: var(--color-ink); color: var(--color-paper); padding: var(--space-3) var(--space-4); z-index: 30; }
.skip:focus { inset-block-start: var(--space-4); }
.nav-pill { position: fixed; inset: var(--space-3) auto auto 50%; transform: translateX(-50%); z-index: 20; width: min(calc(100% - 1.5rem), 50rem); display: flex; align-items: center; justify-content: space-between; gap: var(--space-5); min-height: 4.85rem; padding: var(--space-2) var(--space-4) var(--space-2) var(--space-5); background: color-mix(in oklch, var(--color-paper) 88%, transparent); backdrop-filter: blur(16px) saturate(120%); border: var(--rule) solid var(--color-rule); border-radius: var(--radius-pill); box-shadow: 0 12px 30px -20px oklch(0.2 0.03 255 / 0.45); }
.nav-mark { display: inline-flex; align-items: center; min-width: 0; }
.nav-mark img { width: 10.25rem; height: auto; }
.nav-links { display: none; list-style: none; margin: 0; padding: 0; align-items: center; gap: var(--space-5); }
.nav-links a, .nav-cta, .lang a, .text-link { white-space: nowrap; }
.nav-links a { color: var(--color-text); font-size: 0.9rem; text-decoration: none; }
.nav-cta { display: inline-flex; align-items: center; justify-content: center; min-height: 2.75rem; padding-inline: var(--space-4); border-radius: var(--radius-pill); background: var(--color-blue); color: var(--color-paper); font-size: 0.9rem; font-weight: 700; text-decoration: none; transition: background-color var(--dur-short) var(--ease-out), transform var(--dur-short) var(--ease-out); }
.nav-cta:hover { background: var(--color-blue-deep); }
.nav-cta:active { transform: translateY(1px); }
a:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 3px; }
.hero { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-10); padding-block: 8.75rem var(--space-20); }
.kicker { display: inline-flex; align-items: center; gap: var(--space-3); color: var(--color-blue); font-size: 0.9rem; font-weight: 700; letter-spacing: 0.08em; }
.kicker::before { content: ""; width: 0.6rem; height: 0.6rem; border-radius: var(--radius-pill); background: var(--color-orange); }
.hero .lede { max-width: 39rem; font-size: clamp(1.1rem, 2vw, 1.38rem); color: var(--color-text); }
.hero-cta { display: inline-flex; align-items: center; gap: var(--space-3); min-height: 3.2rem; border-bottom: 2px solid var(--color-blue); color: var(--color-blue); font-family: var(--font-display); font-size: 1.05rem; font-weight: 700; text-decoration: none; transition: color var(--dur-short) var(--ease-out), border-color var(--dur-short) var(--ease-out), transform var(--dur-short) var(--ease-out); }
.hero-cta:hover { color: var(--color-blue-deep); border-color: var(--color-orange); }
.hero-cta:active { transform: translateY(1px); }
.hero-figure { position: relative; margin: 0; min-width: 0; background: var(--color-surface); border-radius: var(--radius-md); overflow: clip; }
.hero-figure img { width: 100%; height: auto; }
.hero-figure figcaption { padding: var(--space-4) var(--space-5); font-size: 0.85rem; color: var(--color-muted); }
.proof-strip { border-top: var(--rule) solid var(--color-rule); border-bottom: var(--rule) solid var(--color-rule); }
.proof-strip .wrap { display: grid; grid-template-columns: 1fr; }
.proof { padding: var(--space-6) 0; border-bottom: var(--rule) solid var(--color-rule); }
.proof:last-child { border-bottom: 0; }
.proof small { display: block; color: var(--color-muted); font-size: 0.78rem; }
.proof strong { display: block; color: var(--color-ink); font-family: var(--font-display); font-size: 1.45rem; letter-spacing: -0.03em; }
.feature-stack { padding-block: var(--space-20); }
.feature-stack-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-10); }
.feature-intro { align-self: start; }
.feature-intro p { max-width: 32rem; }
.feature-list { display: grid; gap: var(--space-10); }
.feature { border-top: var(--rule) solid var(--color-rule); padding-top: var(--space-5); }
.feature figure { display: grid; aspect-ratio: 3 / 2; margin: 0 0 var(--space-5); background: var(--color-surface); border-radius: var(--radius-md); overflow: clip; }
.feature figure img { width: 100%; height: 100%; min-height: 0; object-fit: cover; }
.feature figcaption { padding: var(--space-3) var(--space-4); color: var(--color-muted); font-size: 0.78rem; }
.feature p { margin-bottom: 0; }
.capabilities { padding-block: var(--space-20); background: var(--color-surface); }
.spec { width: 100%; border-collapse: collapse; color: var(--color-text); }
.spec th, .spec td { border-bottom: var(--rule) solid var(--color-rule); padding: var(--space-5) 0; text-align: left; vertical-align: top; }
.spec th { width: 34%; color: var(--color-ink); font-family: var(--font-display); font-size: 1rem; }
.spec td { padding-inline-start: var(--space-5); }
.quality { padding-block: var(--space-20); }
.quality-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-10); }
.quality-panel { padding: var(--space-8); background: var(--color-blue-deep); border-radius: var(--radius-md); color: var(--color-paper); }
.quality-panel h2 { color: var(--color-paper); }
.quality-panel p { color: color-mix(in oklch, var(--color-paper) 82%, transparent); }
.quality-points { list-style: none; padding: 0; margin: 0; }
.quality-points li { padding: var(--space-5) 0; border-bottom: 1px solid color-mix(in oklch, var(--color-paper) 24%, transparent); }
.quality-points b { display: block; color: var(--color-paper); margin-bottom: var(--space-1); }
.workflow { padding-block: var(--space-20); background: var(--color-ink); color: var(--color-paper); }
.workflow h2 { color: var(--color-paper); }
.workflow-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-8); }
.workflow-copy { color: color-mix(in oklch, var(--color-paper) 78%, transparent); }
.steps { list-style: none; padding: 0; margin: 0; }
.steps li { display: grid; grid-template-columns: 3.2rem minmax(0, 1fr); gap: var(--space-4); padding-block: var(--space-5); border-bottom: 1px solid color-mix(in oklch, var(--color-paper) 20%, transparent); }
.stage { color: var(--color-orange); font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; }
.steps h3 { color: var(--color-paper); margin-bottom: var(--space-2); }
.steps p { margin-bottom: 0; color: color-mix(in oklch, var(--color-paper) 75%, transparent); }
.contact { padding-block: var(--space-20) var(--space-24); }
.contact-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-8); align-items: end; }
.contact-mail { display: inline-flex; align-items: center; gap: var(--space-3); font-family: var(--font-display); font-size: clamp(1.35rem, 3vw, 2.2rem); font-weight: 700; color: var(--color-blue); overflow-wrap: anywhere; }
.contact-note { color: var(--color-muted); font-size: 0.92rem; }
.market-note { border-inline-start: 3px solid var(--color-orange); padding-inline-start: var(--space-5); }
.footer { border-top: var(--rule) solid var(--color-rule); padding-block: var(--space-12); }
.footer-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-6); }
.footer img { width: 11rem; height: auto; margin-bottom: var(--space-4); }
.footer p, .footer a { color: var(--color-muted); font-size: 0.88rem; }
.footer p { margin-bottom: 0; }
.lang { display: flex; flex-wrap: wrap; gap: var(--space-4); }
.lang a { color: var(--color-blue); font-size: 0.9rem; text-decoration-thickness: 1px; text-underline-offset: 0.3em; }
@media (min-width: 44rem) {
  .hero { grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); align-items: center; padding-block: 10rem var(--space-24); }
  .proof-strip .wrap { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .proof { padding: var(--space-6) var(--space-6) var(--space-6) 0; border-bottom: 0; border-inline-end: var(--rule) solid var(--color-rule); }
  .proof + .proof { padding-inline-start: var(--space-6); }
  .proof:last-child { border-inline-end: 0; }
  .quality-grid, .workflow-grid, .contact-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .footer-grid { grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr); align-items: end; }
}
@media (min-width: 60rem) {
  .nav-links { display: flex; }
  .feature-stack-grid { grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); gap: var(--space-16); }
  .feature-intro { position: sticky; top: 7rem; }
  .feature { display: grid; grid-template-columns: minmax(0, 1fr) minmax(15rem, .8fr); gap: var(--space-6); align-items: start; }
  .feature figure { margin: 0; }
}
@media (max-width: 30rem) { .nav-mark img { width: 7.25rem; } .nav-pill { min-height: 4.15rem; gap: var(--space-2); padding-inline: var(--space-3); } .nav-cta { padding-inline: var(--space-3); font-size: 0.82rem; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; } }