:root {
  color-scheme: dark;
  --ink: #ecf0e9;
  --night: #0e1c1b;
  --forest: #173b35;
  --forest-deep: #102d2c;
  --paper: #eeece4;
  --paper-deep: #e0e1d8;
  --muted: #a6b3aa;
  --muted-dark: #5f6d65;
  --mint: #3ed9ae;
  --copper: #db8b61;
  --line: rgba(236, 240, 233, 0.18);
  --line-dark: rgba(14, 28, 27, 0.2);
  --page: min(1300px, calc(100vw - 96px));
  font-family: "Segoe UI", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  background: var(--night);
  color: var(--ink);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; background: var(--night); }
a, button { font: inherit; }
button { cursor: pointer; }
img { display: block; max-width: 100%; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--mint); outline-offset: 4px; }
.skip-link { position: fixed; z-index: 100; top: 14px; left: 14px; transform: translateY(-180%); padding: 10px 14px; background: var(--paper); color: var(--night); text-decoration: none; }
.skip-link:focus { transform: translateY(0); }

.topbar { position: absolute; z-index: 10; top: 0; left: 50%; display: flex; width: var(--page); min-height: 84px; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); transform: translateX(-50%); }
.brand, .footer-brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); text-decoration: none; }
.brand img, .footer-brand img { width: 29px; height: 29px; object-fit: contain; }
.brand span { font-size: 15px; font-weight: 700; letter-spacing: 0.02em; }
.main-nav { display: flex; align-items: center; gap: 29px; }
.main-nav a { color: var(--muted); font-size: 12px; text-decoration: none; }
.main-nav a:hover, .main-nav a:focus-visible { color: var(--ink); }
.main-nav .archive-link { color: var(--copper); }
.menu-button { display: none; }

.product-hero { background: var(--forest); color: var(--ink); padding: 156px 0 120px; }
.product-hero-inner { display: grid; grid-template-columns: minmax(300px, 0.66fr) minmax(0, 1.34fr); gap: clamp(50px, 8vw, 125px); width: var(--page); margin: 0 auto; }
.hero-copy { align-self: center; padding-bottom: 55px; }
.eyebrow { margin: 0; color: var(--mint); font-size: 10px; font-weight: 700; letter-spacing: 0.17em; line-height: 1.5; }
.product-hero h1, .manifesto h2, .section-intro h2, .room-copy h2, .download-head h2, .support-section h2 { margin: 20px 0 0; font-family: Georgia, "Times New Roman", serif; font-size: clamp(52px, 6.2vw, 92px); font-weight: 400; letter-spacing: -0.045em; line-height: 0.94; }
h1 em, h2 em { color: var(--copper); font-style: normal; }
.hero-lead { max-width: 420px; margin: 28px 0 0; color: rgba(236, 240, 233, 0.76); font-size: 16px; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 24px; margin-top: 36px; }
.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; gap: 16px; padding: 0 18px; font-size: 13px; font-weight: 700; text-decoration: none; }
.button-primary { background: var(--mint); color: #08231c; }
.button-primary:hover, .button-primary:focus-visible { background: #78ebc4; }
.button-primary span { font-size: 17px; }
.text-link { border-bottom: 1px solid currentColor; padding-bottom: 5px; color: var(--ink); font-size: 13px; text-decoration: none; }
.text-link:hover, .text-link:focus-visible { color: var(--mint); }
.hero-note { display: flex; gap: 16px; align-items: start; margin-top: 70px; border-top: 1px solid var(--line); padding-top: 14px; color: rgba(236, 240, 233, 0.6); font-size: 10px; letter-spacing: 0.08em; line-height: 1.7; }
.hero-note p { margin: 0; }
.note-mark { color: var(--copper); font-family: Georgia, serif; font-size: 13px; }
.hero-proof { align-self: end; min-width: 0; }
.proof-label, .room-shot figcaption { display: flex; justify-content: space-between; gap: 15px; color: rgba(236, 240, 233, 0.53); font-size: 9px; letter-spacing: 0.14em; }
.proof-label { margin-bottom: 14px; }
.hero-proof figure, .room-shot { margin: 0; }
.hero-proof figure { border: 1px solid rgba(236, 240, 233, 0.26); background: #07100f; padding: 9px; }
.hero-proof img { width: 100%; height: auto; }
.hero-proof figcaption { display: flex; justify-content: space-between; gap: 15px; padding: 12px 2px 2px; color: rgba(236, 240, 233, 0.58); font-size: 10px; letter-spacing: 0.08em; }

.manifesto { display: grid; grid-template-columns: minmax(260px, 1fr) minmax(240px, 0.54fr); gap: 9vw; align-items: end; padding: 132px max(48px, calc((100vw - min(1300px, calc(100vw - 96px))) / 2)) 140px; background: var(--paper); color: #192622; }
.manifesto .eyebrow { color: #168365; grid-column: 1 / -1; }
.manifesto h2 { grid-column: 1; margin-top: -6px; color: #192622; }
.manifesto h2 span { color: #168365; }
.manifesto > p:last-child { max-width: 355px; margin: 0; color: var(--muted-dark); font-size: 15px; line-height: 1.9; }

.workflow { display: grid; grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1fr); gap: 12vw; width: var(--page); margin: 0 auto; padding: 136px 0; }
.section-intro h2 { margin-top: 24px; }
.step-list { margin: 0; padding: 0; list-style: none; }
.step-list li { display: grid; grid-template-columns: 46px minmax(0, 1fr); gap: 20px; border-top: 1px solid var(--line); padding: 25px 0 30px; }
.step-list li:last-child { border-bottom: 1px solid var(--line); }
.step-number { color: var(--mint); font-family: Georgia, serif; font-size: 14px; }
.step-list h3 { margin: 0; font-size: 19px; font-weight: 600; line-height: 1.35; }
.step-list p { max-width: 410px; margin: 9px 0 0; color: var(--muted); font-size: 14px; line-height: 1.8; }

.room-section { display: grid; grid-template-columns: minmax(245px, 0.56fr) minmax(0, 1.44fr); gap: 10vw; padding: 135px max(48px, calc((100vw - min(1300px, calc(100vw - 96px))) / 2)) 150px; background: var(--forest-deep); }
.room-copy { align-self: center; }
.room-copy h2 { margin-top: 23px; }
.room-copy > p:not(.eyebrow) { max-width: 310px; margin: 28px 0 30px; color: var(--muted); font-size: 14px; line-height: 1.9; }
.room-shot { align-self: center; min-width: 0; }
.shot-label { margin-bottom: 14px; color: var(--mint); font-size: 9px; font-weight: 700; letter-spacing: 0.16em; }
.room-shot img { width: 100%; border: 1px solid rgba(236, 240, 233, 0.22); }
.room-shot figcaption { padding-top: 11px; }

.download-section { padding: 134px max(48px, calc((100vw - min(1300px, calc(100vw - 96px))) / 2)) 145px; background: var(--paper); color: #182722; }
.download-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(250px, 0.58fr); gap: 10vw; align-items: end; margin-bottom: 52px; }
.download-head .eyebrow { color: #168365; }
.download-head h2 { margin-top: 23px; color: #182722; }
.download-head > p { max-width: 350px; margin: 0; color: var(--muted-dark); font-size: 14px; line-height: 1.9; }
.download-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line-dark); border-left: 1px solid var(--line-dark); }
.download-card { display: flex; min-height: 290px; flex-direction: column; align-items: flex-start; border-right: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); padding: 25px; }
.platform { display: flex; justify-content: space-between; width: 100%; color: #168365; font-size: 10px; font-weight: 700; letter-spacing: 0.14em; }
.platform span { color: #a5aaa1; font-family: Georgia, serif; font-size: 13px; letter-spacing: 0; }
.download-card h3 { margin: 57px 0 8px; font-family: Georgia, serif; font-size: 27px; font-weight: 400; }
.download-card > p { max-width: 230px; margin: 0; color: var(--muted-dark); font-size: 13px; line-height: 1.75; }
.release-button { display: inline-flex; gap: 14px; align-items: center; margin-top: auto; border-bottom: 1px solid #182722; padding: 5px 0; color: #182722; font-size: 12px; font-weight: 700; text-decoration: none; }
.release-button:hover, .release-button:focus-visible { color: #168365; }
.release-button span { color: #168365; font-size: 16px; }
.release-button.is-pending { border-color: #9ba29a; color: #7c867d; cursor: not-allowed; }
.download-card small { margin-top: 13px; color: #727c74; font-size: 10px; }
.release-note { margin: 19px 0 0; color: #727c74; font-size: 11px; line-height: 1.6; }

.support-section { display: grid; grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1fr); gap: 12vw; width: var(--page); margin: 0 auto; padding: 138px 0 126px; }
.support-section h2 { margin-top: 23px; }
.support-copy { align-self: end; max-width: 380px; }
.support-copy > p { margin: 0 0 29px; color: var(--muted); font-size: 15px; line-height: 1.9; }
.support-mail { border-bottom: 1px solid var(--mint); padding-bottom: 6px; color: var(--mint); font-size: 13px; text-decoration: none; }
.support-mail span { margin-left: 10px; color: var(--copper); font-size: 16px; }
.site-footer { display: flex; width: var(--page); margin: 0 auto; align-items: center; justify-content: space-between; gap: 22px; border-top: 1px solid var(--line); padding: 24px 0 31px; color: var(--muted); font-size: 10px; letter-spacing: 0.05em; }
.footer-brand { color: var(--ink); }
.footer-brand strong { font-size: 13px; }
.site-footer a { color: inherit; text-decoration: none; }
.site-footer a:hover, .site-footer a:focus-visible { color: var(--mint); }
.registration-bar { display: flex; width: var(--page); margin: 0 auto; justify-content: space-between; gap: 18px; padding: 0 0 25px; color: var(--muted); font-size: 10px; }
.registration-bar div { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.registration-bar a { color: inherit; text-decoration: none; }
.registration-bar a:hover, .registration-bar a:focus-visible { color: var(--mint); }

@media (max-width: 820px) {
  :root { --page: calc(100vw - 40px); }
  .topbar { min-height: 70px; }
  .brand img, .footer-brand img { width: 27px; height: 27px; }
  .brand span { font-size: 14px; }
  .menu-button { display: grid; width: 36px; height: 36px; place-content: center; gap: 5px; border: 0; background: transparent; color: var(--ink); }
  .menu-button span { display: block; width: 20px; height: 1px; background: currentColor; }
  .main-nav { position: absolute; top: 70px; right: 0; left: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; border-bottom: 1px solid var(--line); padding: 9px 0 16px; background: var(--forest); }
  .main-nav.is-open { display: flex; }
  .main-nav a { padding: 10px 0; }
  .product-hero { padding: 121px 0 78px; }
  .product-hero-inner, .workflow, .room-section, .support-section { display: block; }
  .hero-copy { padding-bottom: 56px; }
  .product-hero h1, .manifesto h2, .section-intro h2, .room-copy h2, .download-head h2, .support-section h2 { font-size: clamp(48px, 14vw, 70px); }
  .hero-lead { max-width: 310px; font-size: 15px; }
  .hero-note { margin-top: 49px; }
  .hero-proof { width: calc(100% + 20px); margin-left: -10px; }
  .manifesto { display: block; padding: 88px 20px 92px; }
  .manifesto h2 { margin-top: 24px; }
  .manifesto > p:last-child { margin-top: 27px; font-size: 14px; }
  .workflow { padding: 89px 0; }
  .step-list { margin-top: 45px; }
  .step-list li { grid-template-columns: 30px minmax(0, 1fr); gap: 12px; }
  .step-list h3 { font-size: 17px; }
  .step-list p { font-size: 13px; }
  .room-section { padding: 89px 20px 94px; }
  .room-copy > p:not(.eyebrow) { font-size: 14px; }
  .room-shot { margin-top: 52px; }
  .room-shot img { width: 100%; }
  .download-section { padding: 91px 20px 96px; }
  .download-head { display: block; margin-bottom: 39px; }
  .download-head > p { margin-top: 26px; font-size: 14px; }
  .download-list { grid-template-columns: 1fr; }
  .download-card { min-height: 239px; padding: 22px; }
  .download-card h3 { margin-top: 39px; font-size: 25px; }
  .support-section { padding: 89px 0 80px; }
  .support-copy { margin-top: 42px; }
  .site-footer { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; font-size: 9px; line-height: 1.5; }
  .site-footer span:nth-of-type(1) { text-align: right; }
  .site-footer span:last-child { grid-column: 1 / -1; }
  .registration-bar { display: block; font-size: 9px; line-height: 1.6; }
  .registration-bar div { margin-top: 5px; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* Product studio polish: sharper hierarchy, calmer surfaces, clearer actions. */
:root {
  --ink: #edf2ed;
  --night: #0b1519;
  --forest: #143b36;
  --forest-deep: #102f31;
  --paper: #f4f1e9;
  --paper-deep: #e1e1d8;
  --muted: #a9b6ae;
  --muted-dark: #5f6c65;
  --mint: #54dfbe;
  --copper: #eb946d;
  --line: rgba(237, 242, 237, .17);
  --line-dark: rgba(11, 21, 25, .2);
  --page: min(1360px, calc(100vw - 80px));
}

body { background: var(--night); }
.topbar { width: var(--page); min-height: 88px; backdrop-filter: blur(8px); }
.product-hero { padding-top: 168px; padding-bottom: 136px; }
.product-hero-inner { gap: clamp(56px, 8vw, 130px); }
.product-hero h1,
.manifesto h2,
.section-intro h2,
.room-copy h2,
.download-head h2,
.support-section h2 { letter-spacing: 0; line-height: 1; }
.hero-lead { max-width: 390px; }
.hero-actions { gap: 18px; }
.button-primary { min-height: 50px; padding-inline: 21px; box-shadow: 0 12px 28px rgba(84, 223, 190, .12); }
.hero-note { max-width: 390px; }
.hero-proof figure { position: relative; padding: 12px; box-shadow: 0 24px 70px rgba(0, 0, 0, .25); }
.hero-proof figure::before,
.room-shot::before { display: block; width: 44px; height: 2px; margin-bottom: 9px; background: var(--mint); content: ""; }
.hero-proof img { aspect-ratio: 16 / 9; object-fit: cover; }
.manifesto { padding-top: 118px; padding-bottom: 128px; }
.manifesto h2 { max-width: 780px; }
.workflow { padding-top: 122px; padding-bottom: 128px; }
.step-list li { transition: background-color 220ms ease, padding-inline 220ms ease; }
.step-list li:hover { background: rgba(84, 223, 190, .035); padding-inline: 12px; }
.room-section { padding-top: 120px; padding-bottom: 132px; }
.room-shot { position: relative; }
.room-shot img { box-shadow: 0 20px 58px rgba(0, 0, 0, .2); }
.download-section { padding-top: 120px; padding-bottom: 128px; }
.download-card { position: relative; min-height: 274px; transition: background-color 220ms ease; }
.download-card::before { position: absolute; top: 0; right: 25px; left: 25px; height: 2px; background: #168365; content: ""; opacity: .55; }
.download-card:hover { background: rgba(22, 131, 101, .045); }
.release-button { min-height: 30px; align-items: center; }
.support-section { padding-top: 120px; padding-bottom: 108px; }
.site-footer { min-height: 74px; }

@media (max-width: 820px) {
  :root { --page: calc(100vw - 40px); }
  .topbar { min-height: 72px; }
  .product-hero { padding-top: 120px; padding-bottom: 84px; }
  .product-hero-inner { gap: 0; }
  .hero-proof figure { padding: 8px; }
  .hero-proof figure::before { margin-bottom: 7px; }
  .manifesto { padding-top: 84px; padding-bottom: 88px; }
  .workflow { padding-top: 84px; padding-bottom: 90px; }
  .step-list li:hover { padding-inline: 0; background: transparent; }
  .room-section { padding-top: 84px; padding-bottom: 94px; }
  .download-section { padding-top: 88px; padding-bottom: 92px; }
  .download-card { min-height: 236px; }
  .download-card::before { right: 22px; left: 22px; }
  .support-section { padding-top: 86px; padding-bottom: 78px; }
}

@media (prefers-reduced-motion: reduce) {
  .step-list li, .download-card { transition: none; }
}

/* The product header stays compact while the rest of the page carries the visual weight. */
html { scroll-padding-top: 18px; }
body { overscroll-behavior-x: none; }
.topbar { justify-content: flex-start; gap: 16px; }
.main-nav { margin-left: auto; }
.language-switcher { display: inline-flex; flex: 0 0 auto; align-items: center; gap: 2px; margin-left: 17px; border: 1px solid rgba(236, 240, 233, .28); padding: 3px; background: rgba(11, 21, 25, .2); backdrop-filter: blur(10px); }
.language-switcher button { min-width: 27px; height: 25px; border: 0; padding: 0 6px; background: transparent; color: rgba(236, 240, 233, .68); font-size: 10px; line-height: 1; }
.language-switcher button:hover, .language-switcher button:focus-visible { color: #fff; }
.language-switcher button.is-active { background: var(--mint); color: #08231c; }
.main-nav a { position: relative; transition: color 180ms ease; }
.main-nav a::after { position: absolute; right: 0; bottom: -7px; left: 0; height: 1px; background: var(--mint); content: ""; transform: scaleX(0); transform-origin: right; transition: transform 220ms ease; }
.main-nav a:hover::after, .main-nav a:focus-visible::after, .main-nav a.is-current::after { transform: scaleX(1); transform-origin: left; }
.main-nav a.is-current { color: var(--ink); }
.button, .text-link, .release-button, .support-mail { transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease, transform 180ms ease; }
.button-primary:hover, .button-primary:focus-visible { transform: translateY(-2px); }
.text-link:hover, .text-link:focus-visible, .release-button:hover, .release-button:focus-visible, .support-mail:hover, .support-mail:focus-visible { transform: translateX(3px); }
.reveal-ready { opacity: 0; transform: translateY(20px); transition: opacity 650ms ease, transform 650ms ease; }
.reveal-ready.is-visible { opacity: 1; transform: none; }

@media (max-width: 820px) {
  .topbar { gap: 8px; }
  .main-nav { margin-left: 0; }
  .menu-button { margin-left: auto; }
  .language-switcher { margin-left: 0; }
  .language-switcher button { min-width: 25px; height: 24px; padding-inline: 5px; }
  .main-nav a::after { display: none; }
  .reveal-ready { opacity: 1; transform: none; transition: none; }
}

@media (prefers-reduced-motion: reduce) {
  .main-nav a, .button, .text-link, .release-button, .support-mail, .reveal-ready, .reveal-ready.is-visible { transition: none; }
}