:root {
  color-scheme: light;
  --ink: #11131d;
  --ink-2: #1b1d2a;
  --paper: #f4f1ec;
  --paper-2: #ebe5dd;
  --white: #fff;
  --red: #cf3155;
  --red-deep: #8f1737;
  --peach: #ff8f82;
  --purple: #6659d7;
  --muted: #656877;
  --line: rgba(17, 19, 29, .15);
  --shell: min(1440px, calc(100% - 64px));
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 112px;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}

img { display: block; max-width: 100%; }
button, summary { font: inherit; }

.skip-link {
  position: fixed;
  left: 18px;
  top: -80px;
  z-index: 999;
  padding: 12px 18px;
  color: #fff;
  background: var(--red);
  text-decoration: none;
  transition: top .2s ease;
}

.skip-link:focus { top: 18px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  color: #fff;
  background: rgba(17, 19, 29, .96);
  border-bottom: 1px solid rgba(255, 255, 255, .1);
  backdrop-filter: blur(18px);
}

.header-shell {
  width: var(--shell);
  min-height: 88px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 42px;
}

.brand-lockup {
  display: grid;
  grid-template-columns: 48px auto;
  grid-template-rows: auto auto;
  column-gap: 14px;
  align-items: center;
  min-width: 220px;
}

.brand-lockup img {
  grid-row: 1 / 3;
  width: 48px;
  height: 48px;
  object-fit: contain;
  filter: drop-shadow(0 8px 18px rgba(102, 89, 215, .25));
}

.brand-name {
  align-self: end;
  font-size: 22px;
  font-weight: 780;
  letter-spacing: .08em;
}

.brand-meta {
  align-self: start;
  color: rgba(255,255,255,.46);
  font-size: 9px;
  letter-spacing: .28em;
}

.main-nav {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 8px;
}

.main-nav a {
  position: relative;
  padding: 11px 13px;
  color: rgba(255,255,255,.76);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s ease;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  bottom: 5px;
  height: 2px;
  background: var(--peach);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}

.main-nav a:hover,
.main-nav a.is-active { color: #fff; }
.main-nav a:hover::after,
.main-nav a.is-active::after { transform: scaleX(1); }

.main-nav a:focus-visible,
.menu-toggle:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--peach);
  outline-offset: 4px;
}

.menu-toggle {
  display: none;
  border: 0;
  background: transparent;
}

.hero {
  position: relative;
  min-height: 760px;
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(420px, .85fr);
  color: #fff;
  background: var(--ink);
  overflow: hidden;
}

.hero-image-wrap {
  position: relative;
  min-height: 760px;
  overflow: hidden;
}

.hero-image-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(17,19,29,.08), rgba(17,19,29,.12) 55%, rgba(17,19,29,.96));
  pointer-events: none;
}

.hero-image {
  width: 100%;
  height: 100%;
  min-height: 760px;
  object-fit: cover;
  object-position: center;
  filter: contrast(1.04);
}

.hero-copy {
  position: relative;
  z-index: 2;
  align-self: center;
  padding: 86px 7vw 90px 4vw;
}

.eyebrow {
  margin: 0 0 22px;
  color: var(--red);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: .24em;
  text-transform: uppercase;
}

.hero .eyebrow { color: var(--peach); }

.hero h1 {
  margin: 0;
  font-family: Georgia, "Noto Serif SC", "Songti SC", serif;
  font-size: clamp(48px, 5.1vw, 86px);
  font-weight: 520;
  letter-spacing: -.04em;
  line-height: 1.05;
}

.hero h1 span {
  display: block;
  margin-top: 20px;
  font-family: Inter, ui-sans-serif, "PingFang SC", sans-serif;
  font-size: clamp(21px, 2.1vw, 34px);
  font-weight: 620;
  letter-spacing: -.02em;
  line-height: 1.35;
}

.hero-lead {
  max-width: 650px;
  margin: 32px 0 0;
  color: rgba(255,255,255,.7);
  font-size: 16px;
}

.hero-notice {
  margin: 32px 0 0;
  padding-top: 22px;
  color: rgba(255,255,255,.54);
  font-size: 13px;
  border-top: 1px solid rgba(255,255,255,.15);
}

.hero-index {
  position: absolute;
  z-index: 3;
  left: 38px;
  bottom: 34px;
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 10px 14px;
  color: #fff;
  background: rgba(17,19,29,.84);
  border: 1px solid rgba(255,255,255,.18);
}

.hero-index span { font-size: 9px; letter-spacing: .24em; }
.hero-index strong { color: var(--peach); font-size: 18px; }

.brand-stage,
.works-stage,
.download-stage,
.faq-stage {
  width: var(--shell);
  margin: 0 auto;
}

.brand-stage { padding: 144px 0; }

.section-intro {
  display: grid;
  grid-template-columns: .35fr 1fr 1fr;
  gap: 48px;
  align-items: start;
  margin-bottom: 66px;
}

.section-intro .eyebrow { margin-top: 10px; }

.section-intro h2,
.works-heading h2,
.guide-copy h2,
.app-copy h2,
.download-title-wrap h2,
.faq-heading h2 {
  margin: 0;
  font-family: Georgia, "Noto Serif SC", "Songti SC", serif;
  font-size: clamp(38px, 4.5vw, 68px);
  font-weight: 520;
  letter-spacing: -.035em;
  line-height: 1.1;
}

.section-intro > p:last-child,
.works-heading > p {
  margin: 10px 0 0;
  color: var(--muted);
}

.brand-mosaic {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 18px;
}

.mosaic-card {
  position: relative;
  min-height: 480px;
  margin: 0;
  overflow: hidden;
  background: #d9d4cc;
}

.mosaic-card--wide { min-height: 560px; }

.mosaic-card img {
  width: 100%;
  height: 100%;
  min-height: inherit;
  object-fit: cover;
  transition: transform .7s cubic-bezier(.2,.7,.2,1);
}

.mosaic-card:hover img { transform: scale(1.025); }

.mosaic-card::after {
  content: "";
  position: absolute;
  inset: 30% 0 0;
  background: linear-gradient(transparent, rgba(10,11,17,.82));
}

.mosaic-card figcaption {
  position: absolute;
  z-index: 2;
  left: 28px;
  right: 28px;
  bottom: 26px;
  color: #fff;
}

.mosaic-card figcaption strong { display: block; margin-bottom: 6px; font-size: 24px; }
.mosaic-card figcaption span { color: rgba(255,255,255,.72); font-size: 13px; }

.works-stage { padding: 144px 0; }

.works-heading {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 70px;
  align-items: end;
  margin-bottom: 78px;
}

.content-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.story-card { min-width: 0; }
.story-card--offset { padding-top: 76px; }

.story-card figure {
  aspect-ratio: 3 / 4;
  margin: 0 0 26px;
  overflow: hidden;
  background: #d9d4cc;
}

.story-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.story-card .card-no {
  margin: 0 0 12px;
  color: var(--red);
  font-size: 11px;
  font-weight: 720;
  letter-spacing: .15em;
}

.story-card h3 { margin: 0 0 12px; font-size: 23px; line-height: 1.3; }
.story-card > p:last-child { margin: 0; color: var(--muted); font-size: 14px; }

.guide-stage {
  min-height: 850px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  color: #fff;
  background: var(--ink);
}

.guide-visual { position: relative; overflow: hidden; }
.guide-visual img { width: 100%; height: 100%; object-fit: cover; }
.guide-visual::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 55%, rgba(17,19,29,.55)); }

.guide-stamp {
  position: absolute;
  z-index: 2;
  right: 28px;
  bottom: 30px;
  padding: 18px 20px;
  color: var(--ink);
  background: var(--peach);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .2em;
  line-height: 1.25;
}

.guide-copy { padding: 100px 7vw; }
.guide-copy .eyebrow { color: var(--peach); }
.guide-copy > p:not(.eyebrow) { max-width: 720px; margin: 28px 0 0; color: rgba(255,255,255,.66); }

.guide-grid { margin-top: 54px; border-top: 1px solid rgba(255,255,255,.14); }
.guide-grid article { padding: 26px 0; border-bottom: 1px solid rgba(255,255,255,.14); }
.guide-grid span { color: var(--peach); font-size: 11px; letter-spacing: .12em; }
.guide-grid h3 { margin: 8px 0 5px; font-size: 20px; }
.guide-grid p { margin: 0; color: rgba(255,255,255,.54); font-size: 14px; }

.app-stage {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  min-height: 860px;
  background: var(--paper-2);
}

.app-copy { padding: 120px 7vw 100px; align-self: center; }
.app-lead { margin: 28px 0 0; color: var(--muted); }

.spec-list { margin: 52px 0 0; }
.spec-list div { display: grid; grid-template-columns: 170px 1fr; gap: 20px; padding: 22px 0; border-top: 1px solid var(--line); }
.spec-list div:last-child { border-bottom: 1px solid var(--line); }
.spec-list dt { font-weight: 760; }
.spec-list dd { margin: 0; color: var(--muted); }

.app-image-stack {
  position: relative;
  min-height: 860px;
  padding: 78px 7vw 78px 20px;
}

.app-image-stack figure { margin: 0; overflow: hidden; }
.stack-main { width: 76%; height: 82%; margin-left: auto !important; }
.stack-main img { width: 100%; height: 100%; object-fit: cover; }
.stack-small { position: absolute; left: 3%; bottom: 5%; width: 39%; height: 48%; border: 12px solid var(--paper-2); }
.stack-small img { width: 100%; height: 100%; object-fit: cover; }

.download-stage { padding: 144px 0; }
.download-title-wrap { display: grid; grid-template-columns: .34fr 1fr; gap: 48px; }

.download-columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin-top: 74px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.download-columns article { min-height: 310px; padding: 36px 34px; border-right: 1px solid var(--line); }
.download-columns article:last-child { border-right: 0; }
.download-columns span { color: var(--red); font-size: 12px; font-weight: 800; letter-spacing: .18em; }
.download-columns h3 { margin: 54px 0 18px; font-size: 23px; }
.download-columns p { margin: 0; color: var(--muted); }

.faq-stage {
  display: grid;
  grid-template-columns: .75fr 1.25fr;
  gap: 80px;
  padding: 144px 0;
}

.faq-heading { position: sticky; top: 130px; align-self: start; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 28px 48px 28px 0; cursor: pointer; list-style: none; font-size: 20px; font-weight: 700; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 4px; top: 25px; color: var(--red); font-size: 26px; font-weight: 400; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: -5px 0 26px; padding-right: 50px; color: var(--muted); }

.site-footer {
  min-height: 320px;
  padding: 76px max(32px, calc((100vw - 1440px) / 2));
  display: grid;
  grid-template-columns: .65fr 1.35fr;
  gap: 90px;
  align-items: center;
  color: #fff;
  background: var(--ink);
}

.footer-brand { display: flex; gap: 18px; align-items: center; }
.footer-brand img { width: 56px; height: 56px; object-fit: contain; }
.footer-brand strong { display: block; font-size: 24px; letter-spacing: .08em; }
.footer-brand span { color: rgba(255,255,255,.45); font-size: 11px; letter-spacing: .12em; }
.footer-copy { max-width: 700px; color: rgba(255,255,255,.56); }
.footer-copy p { margin: 0 0 12px; }

@media (max-width: 1180px) {
  :root { --shell: min(100% - 40px, 1100px); }
  .header-shell { grid-template-columns: auto auto; }
  .menu-toggle { justify-self: end; display: grid; gap: 5px; width: 44px; height: 44px; padding: 11px; cursor: pointer; }
  .menu-toggle span { display: block; width: 22px; height: 2px; background: #fff; }
  .main-nav { position: absolute; left: 0; right: 0; top: 88px; display: none; padding: 18px 20px 24px; background: rgba(17,19,29,.98); border-top: 1px solid rgba(255,255,255,.1); }
  .main-nav.is-open { display: grid; grid-template-columns: repeat(3, 1fr); }
  .main-nav a { padding: 13px 10px; }
  .hero { grid-template-columns: 1.1fr .9fr; }
  .hero-copy { padding-right: 40px; }
  .section-intro { grid-template-columns: .5fr 1.25fr; }
  .section-intro > p:last-child { grid-column: 2; }
  .content-rail { grid-template-columns: repeat(2, 1fr); }
  .story-card--offset { padding-top: 0; }
  .app-stage { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 820px) {
  :root { --shell: calc(100% - 32px); }
  html { scroll-padding-top: 84px; }
  .header-shell { min-height: 74px; }
  .brand-lockup { min-width: 0; grid-template-columns: 40px auto; column-gap: 10px; }
  .brand-lockup img { width: 40px; height: 40px; }
  .brand-name { font-size: 18px; }
  .brand-meta { display: none; }
  .main-nav { top: 74px; grid-template-columns: 1fr 1fr !important; max-height: calc(100vh - 74px); overflow-y: auto; }
  .hero { min-height: auto; display: block; }
  .hero-image-wrap, .hero-image { min-height: 460px; }
  .hero-image-wrap::after { background: linear-gradient(180deg, rgba(17,19,29,.05), rgba(17,19,29,.95)); }
  .hero-copy { margin-top: -170px; padding: 40px 24px 64px; }
  .hero h1 { font-size: clamp(42px, 11vw, 66px); }
  .hero h1 span { font-size: 22px; }
  .hero-index { display: none; }
  .brand-stage, .works-stage, .download-stage, .faq-stage { padding-top: 90px; padding-bottom: 90px; }
  .section-intro, .works-heading, .download-title-wrap, .faq-stage { display: block; }
  .section-intro > p:last-child, .works-heading > p { margin-top: 24px; }
  .brand-mosaic { grid-template-columns: 1fr; }
  .mosaic-card, .mosaic-card--wide { min-height: 420px; }
  .works-heading { margin-bottom: 48px; }
  .content-rail { grid-template-columns: 1fr 1fr; gap: 18px; }
  .story-card figure { aspect-ratio: 4 / 5; }
  .guide-stage, .app-stage { grid-template-columns: 1fr; }
  .guide-visual { min-height: 500px; }
  .guide-copy, .app-copy { padding: 76px 24px; }
  .app-image-stack { min-height: 700px; padding: 56px 24px; }
  .stack-main { height: 78%; }
  .download-columns { grid-template-columns: 1fr; }
  .download-columns article { min-height: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .download-columns article:last-child { border-bottom: 0; }
  .download-columns h3 { margin-top: 24px; }
  .faq-heading { position: static; margin-bottom: 46px; }
  .site-footer { grid-template-columns: 1fr; gap: 42px; padding: 64px 24px; }
}

@media (max-width: 560px) {
  .main-nav { grid-template-columns: 1fr !important; }
  .hero-image-wrap, .hero-image { min-height: 390px; }
  .hero-copy { margin-top: -120px; }
  .hero-lead { font-size: 15px; }
  .section-intro h2, .works-heading h2, .guide-copy h2, .app-copy h2, .download-title-wrap h2, .faq-heading h2 { font-size: 40px; }
  .content-rail { grid-template-columns: 1fr; }
  .mosaic-card, .mosaic-card--wide { min-height: 360px; }
  .story-card figure { aspect-ratio: 3 / 4; }
  .guide-visual { min-height: 360px; }
  .spec-list div { grid-template-columns: 1fr; gap: 6px; }
  .app-image-stack { min-height: 540px; }
  .stack-main { width: 88%; }
  .stack-small { width: 46%; }
  .faq-list summary { font-size: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .001ms !important; animation-duration: .001ms !important; }
}