@font-face {
  font-family: "F1 Display";
  src: url("../fonts/f1-regular.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "F1 Display";
  src: url("../fonts/f1-bold.ttf") format("truetype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: "F1 Wide";
  src: url("../fonts/f1-wide.ttf") format("truetype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

:root {
  --black: #080808;
  --ink: #111215;
  --paper: #eeeeea;
  --white: #ffffff;
  --muted: #a7a8ac;
  --paper-muted: #62646a;
  --line: rgba(255, 255, 255, 0.14);
  --paper-line: #c9cac6;
  --red: #e10600;
  --red-hover: #ff1e16;
  --yellow: #f4c430;
  --container: 1180px;
  --header-height: 72px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--black); }
body { margin: 0; min-width: 320px; overflow-x: hidden; color: var(--white); background: var(--black); font-family: "F1 Display", "PingFang SC", "Microsoft YaHei", sans-serif; font-synthesis: none; letter-spacing: 0; -webkit-font-smoothing: antialiased; }
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
button, a { letter-spacing: 0; -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--yellow); outline-offset: 4px; }
::selection { color: var(--white); background: var(--red); }

.skip-link { position: fixed; z-index: 1000; top: 8px; left: 8px; padding: 10px 14px; color: var(--black); background: var(--white); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
.site-container { width: min(calc(100% - 48px), var(--container)); margin-inline: auto; }

.site-header { position: fixed; z-index: 100; inset: 0 0 auto; height: var(--header-height); border-bottom: 1px solid transparent; transition: background-color 180ms ease, border-color 180ms ease; }
.site-header.is-scrolled { border-color: var(--line); background: rgba(8, 8, 8, 0.95); backdrop-filter: blur(14px); }
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; font-family: "F1 Wide", sans-serif; font-size: 19px; font-weight: 700; }
.brand img { width: 42px; height: 42px; border-radius: 7px; object-fit: cover; }
.desktop-nav { display: flex; align-items: center; gap: 34px; }
.desktop-nav a { position: relative; color: #d3d4d6; font-size: 14px; transition: color 160ms ease; }
.desktop-nav a:hover, .desktop-nav a.is-active { color: var(--white); }
.desktop-nav a.is-active::after { content: ""; position: absolute; right: 0; bottom: -12px; left: 0; height: 2px; background: var(--red); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.header-download, .button { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; border: 1px solid transparent; border-radius: 4px; font-weight: 700; transition: transform 160ms ease, background-color 160ms ease; }
.header-download { min-height: 40px; padding: 0 18px; background: var(--red); font-size: 14px; }
.header-download:hover, .button-primary:hover { background: var(--red-hover); transform: translateY(-2px); }
.header-download svg, .button svg { width: 18px; height: 18px; }
.menu-button { width: 42px; height: 42px; display: none; align-items: center; justify-content: center; border: 0; background: transparent; cursor: pointer; }
.menu-button svg { width: 24px; height: 24px; }
.mobile-nav { position: fixed; inset: var(--header-height) 0 auto; padding: 18px 24px 28px; border-bottom: 1px solid var(--line); background: #080808; }
.mobile-nav a { display: block; padding: 16px 0; border-bottom: 1px solid var(--line); font-size: 17px; font-weight: 700; }
.mobile-nav a[aria-current="page"] { color: var(--red-hover); }

.about-hero { position: relative; height: 700px; min-height: 620px; display: flex; align-items: center; overflow: hidden; background: var(--black); }
.about-hero-image, .about-hero-overlay { position: absolute; inset: 0; width: 100%; height: 100%; }
.about-hero-image { object-fit: cover; object-position: center 42%; }
.about-hero-overlay { background: rgba(0, 0, 0, 0.56); box-shadow: inset 420px 0 260px rgba(0, 0, 0, 0.58), inset 0 -190px 150px rgba(0, 0, 0, 0.78); }
.about-hero-content { position: relative; z-index: 2; padding-top: 62px; padding-bottom: 90px; }
.hero-label, .section-index { margin: 0; color: var(--red); font-family: "F1 Wide", sans-serif; font-size: 11px; font-weight: 700; }
.about-hero h1 { margin: 20px 0 0; font-family: "F1 Wide", sans-serif; font-size: 82px; line-height: 0.92; }
.hero-statement { margin: 24px 0 0; font-size: 28px; font-weight: 700; }
.hero-summary { max-width: 600px; margin: 17px 0 0; color: #d0d1d3; font-size: 16px; line-height: 1.8; }
.about-hero-rail { position: absolute; z-index: 2; inset: auto 0 0; border-top: 1px solid var(--line); background: rgba(8, 8, 8, 0.7); }
.hero-rail-inner { min-height: 70px; display: grid; grid-template-columns: repeat(3, 1fr); align-items: center; color: #c7c8ca; font-size: 12px; }
.hero-rail-inner span { min-width: 0; padding-right: 24px; }
.hero-rail-inner span + span { padding-left: 24px; border-left: 1px solid var(--line); }

.origin-section { padding: 112px 0 0; overflow: hidden; color: var(--ink); background: var(--paper); }
.about-heading { display: grid; grid-template-columns: 150px minmax(0, 1.1fr) minmax(280px, 0.8fr); gap: 38px; align-items: start; }
.about-heading .section-index { margin-top: 6px; }
.about-heading h2, .download-content h2, .contact-copy h2 { margin: 0; font-size: 46px; line-height: 1.17; }
.heading-copy p, .principles-intro, .product-intro { margin: 0; color: var(--paper-muted); font-size: 15px; line-height: 1.85; }
.heading-copy p + p { margin-top: 16px; }
.origin-layout { display: grid; grid-template-columns: minmax(420px, 1.15fr) minmax(320px, 0.85fr); gap: 76px; align-items: center; margin-top: 74px; }
.origin-visual { position: relative; height: 680px; overflow: hidden; border-top: 1px solid var(--paper-line); background: #d9d9d4; }
.visual-caption { position: absolute; z-index: 3; top: 24px; left: 26px; color: #4e5055; font-family: "F1 Wide", sans-serif; font-size: 10px; }
.visual-year { position: absolute; top: 58px; right: -20px; color: #c8c9c4; font-family: "F1 Wide", sans-serif; font-size: 180px; line-height: 1; }
.origin-device { position: absolute; z-index: 2; right: 50px; bottom: 0; width: 295px; height: 604px; overflow: hidden; border: 1px solid #2d2f34; border-bottom: 0; border-radius: 28px 28px 0 0; background: #000; box-shadow: 0 28px 60px rgba(0, 0, 0, 0.24); }
.origin-device img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.problem-list { padding-bottom: 36px; }
.problem-list article { display: grid; grid-template-columns: 46px 1fr; gap: 18px; padding: 28px 0; border-top: 1px solid var(--paper-line); }
.problem-list article:last-child { border-bottom: 1px solid var(--paper-line); }
.problem-list article > span { padding-top: 3px; color: var(--red); font-family: "F1 Wide", sans-serif; font-size: 11px; }
.problem-list h3 { margin: 0 0 9px; font-size: 20px; }
.problem-list p { margin: 0; color: var(--paper-muted); font-size: 14px; line-height: 1.75; }

.principles-section { padding: 118px 0; background: var(--black); }
.dark-heading { color: var(--white); }
.principles-intro { color: var(--muted); }
.principles-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 72px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.principle { min-width: 0; min-height: 330px; padding: 30px 32px 40px; }
.principle + .principle { border-left: 1px solid var(--line); }
.principle-head { display: flex; align-items: center; justify-content: space-between; color: #6f7176; font-family: "F1 Wide", sans-serif; font-size: 11px; }
.principle-head svg { width: 28px; height: 28px; color: var(--red); }
.principle h3 { margin: 94px 0 16px; font-size: 28px; }
.principle p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }

.product-section { padding: 112px 0 118px; color: var(--ink); background: var(--paper); }
.product-gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; margin-top: 72px; }
.product-shot { min-width: 0; margin: 0; }
.product-shot > div { height: 560px; display: flex; align-items: flex-end; justify-content: center; overflow: hidden; background: #d8d8d3; }
.product-shot img { width: 238px; height: 520px; object-fit: cover; object-position: top; border: 1px solid #303238; border-bottom: 0; border-radius: 25px 25px 0 0; box-shadow: 0 22px 44px rgba(0, 0, 0, 0.2); transition: transform 220ms ease; }
.product-shot:hover img { transform: translateY(-8px); }
.product-shot figcaption { display: grid; grid-template-columns: 38px 1fr; gap: 10px; padding: 20px 0; border-bottom: 1px solid var(--paper-line); }
.product-shot figcaption span { padding-top: 2px; color: var(--red); font-family: "F1 Wide", sans-serif; font-size: 10px; }
.product-shot figcaption strong { font-size: 15px; }

.contact-section { padding: 110px 0; color: var(--white); background: var(--red); }
.contact-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(380px, 0.85fr); gap: 90px; align-items: end; }
.contact-copy .section-index { color: #2a0504; }
.contact-copy h2 { margin-top: 28px; font-size: 44px; }
.contact-copy > p:not(.section-index) { max-width: 560px; margin: 24px 0 0; color: #ffd5d2; font-size: 15px; line-height: 1.8; }
.mail-link { display: inline-flex; align-items: center; gap: 12px; margin-top: 34px; padding-bottom: 8px; border-bottom: 1px solid rgba(255, 255, 255, 0.6); font-family: "F1 Wide", sans-serif; font-size: 14px; }
.mail-link svg { width: 21px; height: 21px; }
.social-list { border-top: 1px solid rgba(255, 255, 255, 0.32); }
.social-list a { min-height: 92px; display: grid; grid-template-columns: 36px 1fr 22px; gap: 16px; align-items: center; border-bottom: 1px solid rgba(255, 255, 255, 0.32); transition: background-color 160ms ease, padding 160ms ease; }
.social-list a:hover { padding-inline: 12px; background: rgba(0, 0, 0, 0.1); }
.social-list img { width: 30px; height: 30px; object-fit: contain; }
.social-list span { min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.social-list strong { font-size: 16px; }
.social-list small { color: #ffd5d2; font-size: 12px; }
.social-list svg { width: 20px; height: 20px; }

.about-download { position: relative; min-height: 600px; display: flex; align-items: center; overflow: hidden; }
.about-download > img, .about-download-overlay { position: absolute; inset: 0; width: 100%; height: 100%; }
.about-download > img { object-fit: cover; object-position: center; }
.about-download-overlay { background: rgba(0, 0, 0, 0.7); box-shadow: inset 0 0 180px rgba(0, 0, 0, 0.72); }
.download-content { position: relative; z-index: 2; }
.download-content .section-index { margin-bottom: 20px; }
.download-content > p:not(.section-index) { margin: 20px 0 30px; color: #c9cacc; font-size: 17px; }
.button { padding: 0 24px; }
.button-primary { color: var(--white); background: var(--red); }

.site-footer { padding: 72px 0 28px; border-top: 1px solid var(--line); background: var(--black); }
.footer-main { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.footer-brand > p { max-width: 360px; margin: 18px 0 0; color: var(--muted); font-size: 14px; line-height: 1.7; }
.footer-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.footer-nav div { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.footer-nav strong { margin-bottom: 8px; font-size: 14px; }
.footer-nav a { color: var(--muted); font-size: 13px; }
.footer-nav a:hover { color: var(--white); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 64px; padding-top: 24px; border-top: 1px solid var(--line); color: #76787e; font-size: 12px; }

.reveal { opacity: 1; transform: none; }
.motion-ready .reveal { opacity: 0; transform: translateY(18px); transition: opacity 540ms ease, transform 540ms ease; }
.motion-ready .reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 960px) {
  .desktop-nav { display: none; }
  .menu-button { display: flex; }
  .about-heading { grid-template-columns: 120px 1fr; }
  .heading-copy, .principles-intro, .product-intro { grid-column: 2; }
  .origin-layout { gap: 40px; }
  .origin-device { right: 30px; }
  .contact-layout { gap: 50px; }
}

@media (max-width: 720px) {
  :root { --header-height: 64px; }
  .site-container { width: min(calc(100% - 32px), var(--container)); }
  .header-download { display: none; }
  .brand { font-size: 17px; }
  .brand img { width: 38px; height: 38px; }
  .about-hero { height: 620px; min-height: 620px; align-items: flex-start; }
  .about-hero-image { object-position: 58% center; }
  .about-hero-overlay { background: rgba(0, 0, 0, 0.6); box-shadow: inset 0 -180px 130px rgba(0, 0, 0, 0.82); }
  .about-hero-content { padding-top: 142px; padding-bottom: 100px; }
  .about-hero h1 { margin-top: 18px; font-size: 40px; }
  .hero-statement { margin-top: 20px; font-size: 23px; }
  .hero-summary { font-size: 15px; line-height: 1.72; }
  .hero-rail-inner { min-height: 72px; grid-template-columns: 1fr 1fr; gap: 7px 16px; align-content: center; }
  .hero-rail-inner span { padding: 0; }
  .hero-rail-inner span + span { padding: 0; border: 0; }
  .hero-rail-inner span:last-child { grid-column: 1 / -1; color: #9ea0a5; }
  .origin-section { padding-top: 78px; }
  .about-heading { grid-template-columns: 1fr; gap: 20px; }
  .heading-copy, .principles-intro, .product-intro { grid-column: auto; }
  .about-heading h2, .download-content h2, .contact-copy h2 { font-size: 34px; }
  .origin-layout { grid-template-columns: 1fr; gap: 48px; margin-top: 48px; }
  .origin-visual { height: 590px; }
  .visual-year { top: 70px; right: -18px; font-size: 112px; }
  .origin-device { right: 28px; width: 250px; height: 520px; }
  .problem-list { padding-bottom: 78px; }
  .principles-section { padding: 82px 0; }
  .principles-grid { grid-template-columns: 1fr; margin-top: 48px; }
  .principle { min-height: 260px; padding: 28px 0 36px; }
  .principle + .principle { border-left: 0; border-top: 1px solid var(--line); }
  .principle h3 { margin-top: 58px; font-size: 25px; }
  .product-section { padding: 78px 0 84px; }
  .product-gallery { grid-template-columns: 1fr; gap: 44px; margin-top: 48px; }
  .product-shot > div { height: 520px; }
  .product-shot img { width: 226px; height: 490px; }
  .contact-section { padding: 82px 0; }
  .contact-layout { grid-template-columns: 1fr; gap: 58px; }
  .contact-copy h2 { margin-top: 20px; }
  .mail-link { max-width: 100%; font-family: "F1 Display", sans-serif; font-size: 15px; font-weight: 700; overflow-wrap: anywhere; }
  .about-download { min-height: 520px; }
  .button { width: 100%; }
  .footer-main { grid-template-columns: 1fr; gap: 50px; }
  .footer-bottom { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 360px) {
  .about-hero h1 { font-size: 36px; }
  .origin-device { right: 16px; width: 232px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .motion-ready .reveal { opacity: 1; transform: none; }
}