@font-face {
  font-family: "Manrope";
  src: url("/studio-assets/manrope.ttf") format("truetype");
  font-weight: 200 800;
  font-display: swap;
}

:root {
  color-scheme: light;
  --canvas: #fff;
  --ink: #20252c;
  --photo-ink: #111821;
  --muted: #58616c;
  --accent: #1766b3;
  --accent-hover: #104e8a;
  --line: #dce0e5;
  --soft: #f4f5f7;
  --lavender: #f4f1f3;
  --focus: #1766b3;
  --radius: 6px;
  --content: 1200px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 56px;
  --space-6: 88px;
  --ease: cubic-bezier(.16, 1, .3, 1);
  --studio-backdrop: url("/studio-assets/daylight-grade.611e2f97d7c45358.webp");
}

@media (max-width: 1600px) {
  :root { --studio-backdrop: url("/studio-assets/daylight-grade-1600.646c07c4432204b0.webp"); }
}
@media (max-width: 800px) {
  :root { --studio-backdrop: url("/studio-assets/daylight-grade-800.6a1b65b6c3a44477.webp"); }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 32px; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: "Manrope", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}
body.viewer-open { overflow: hidden; }
::selection { color: #102f50; background: #c4e7fb; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 5px; }
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-track { background: #edf0f3; }
::-webkit-scrollbar-thumb { background: #a6b2bd; border: 2px solid #edf0f3; border-radius: 5px; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; color: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; text-underline-offset: 5px; }
button, input { caret-color: var(--accent); }
button:disabled { cursor: not-allowed; }
img { display: block; max-width: 100%; }
svg { fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
figure, h1, h2, h3, p { margin: 0; }
h1, h2, h3 { text-wrap: balance; font-weight: 650; }
p { text-wrap: pretty; }
[hidden] { display: none !important; }
.icon { width: 20px; height: 20px; flex: 0 0 20px; }
.icon-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.section-inner { width: min(var(--content), calc(100% - 80px)); margin-inline: auto; }
.section { padding-block: var(--space-6); }
.section-heading { max-width: 700px; margin: 0 auto 40px; text-align: center; }
.section-heading h2 { font-size: 42px; line-height: 1.35; }
.section-heading p { margin-top: 20px; color: var(--muted); font-size: 17px; }
.text-link { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; font-size: 15px; font-weight: 600; }
.text-link:hover { color: var(--accent); }
.text-link .icon { transition: transform 220ms var(--ease); }
.text-link:hover .icon { transform: translateX(3px); }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 48px;
  padding: 10px 22px;
  border: 0;
  border-radius: var(--radius);
  background: var(--ink);
  color: #fff;
  font-size: 15px;
  line-height: 1.5;
  font-weight: 600;
  white-space: nowrap;
  transition: background 180ms ease, box-shadow 180ms ease;
}
.button:hover { background: var(--accent); }
.button-small { min-height: 40px; padding: 8px 16px; font-size: 13px; }
.icon-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  background: transparent;
  border: 0;
  border-radius: var(--radius);
}
.icon-button:hover { color: var(--accent); background: #e7edf3; }
.skip-link { position: fixed; top: -80px; left: 20px; z-index: 100; background: var(--ink); color: #fff; padding: 12px 20px; }
.skip-link:focus { top: 8px; }

.site-header { position: relative; z-index: 5; background: #fafbfc; }
.header-inner { width: min(1320px, calc(100% - 80px)); height: 72px; display: flex; align-items: center; justify-content: space-between; margin: auto; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 750; white-space: nowrap; }
.brand-agent { font-weight: 500; }
.desktop-nav { display: flex; align-items: center; gap: 32px; font-size: 14px; }
.desktop-nav a { display: inline-flex; align-items: center; min-height: 44px; }
.desktop-nav a:hover, .site-footer a:hover { color: var(--accent); }
.header-actions { display: flex; align-items: center; gap: 8px; }
.menu-toggle { display: none; }
.mobile-nav { padding: 0 24px 16px; border-top: 1px solid var(--line); }
.mobile-nav a { display: flex; align-items: center; justify-content: space-between; min-height: 52px; }

.hero { position: relative; isolation: isolate; padding: 14px 32px 24px; background: #eff5f7; }
.hero-backdrop { position: absolute; inset: 0; z-index: -1; width: 100%; height: 100%; object-fit: cover; pointer-events: none; }
.hero-intro { padding-bottom: 14px; text-align: center; }
.hero-intro h1 { font-size: 72px; line-height: 1.25; font-weight: 700; }
.hero-intro > p { margin-top: 2px; font-size: 22px; line-height: 1.6; }
.hero-actions { display: flex; justify-content: center; align-items: center; gap: 28px; margin-top: 16px; }
.hero-actions .text-link { color: var(--photo-ink); }
.hero-product { width: min(1120px, calc((100svh - 430px) * 1.8), 100%); margin-inline: auto; }
.product-media { min-width: 0; }
.media-open { display: block; position: relative; width: 100%; margin: 0; padding: 0; border: 0; border-radius: 0; background: #fff; line-height: 0; }
.media-open img { width: 100%; height: auto; aspect-ratio: 1.8; object-fit: contain; }
.hero-product .media-open { box-shadow: 0 16px 50px rgb(23 49 74 / 15%); }
.media-magnify { position: absolute; right: 12px; bottom: 12px; display: grid; place-items: center; width: 40px; height: 40px; border-radius: var(--radius); background: #fff; color: var(--ink); box-shadow: 0 3px 14px rgb(20 30 40 / 16%); opacity: 0; transition: opacity 160ms ease; }
.media-open:hover .media-magnify, .media-open:focus-visible .media-magnify { opacity: 1; }
.product-media figcaption { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 16px; color: var(--photo-ink); font-size: 12px; line-height: 1.6; }
.product-media figcaption span { color: var(--photo-ink); }
.hero-actions .text-link:hover, .source-action:hover, .windows-action .text-link:hover { color: var(--photo-ink); text-decoration: underline; }

.workspace-section { padding-top: 32px; }
.scene-tabs { display: flex; width: fit-content; max-width: 100%; gap: 8px; margin: 0 auto 32px; padding-bottom: 0; }
.scene-tabs button { display: inline-flex; justify-content: center; align-items: center; gap: 9px; min-height: 48px; padding: 10px 22px; border: 1px solid transparent; border-radius: var(--radius); background: transparent; color: var(--muted); font-size: 15px; white-space: nowrap; }
.scene-tabs button:hover { color: var(--ink); background: var(--soft); }
.scene-tabs button[aria-selected="true"] { border-color: var(--line); background: var(--soft); color: var(--ink); }
.scene-figure { width: min(1080px, 100%); margin-inline: auto; }
.scene-figure .media-open { border: 1px solid var(--line); }
.scene-description { display: grid; grid-template-columns: 240px 1fr auto; align-items: center; gap: 28px; width: min(1080px, 100%); margin: 24px auto 0; }
.scene-description h3 { font-size: 21px; line-height: 1.5; }
.scene-description p { max-width: 58ch; font-size: 15px; color: var(--muted); }
.demo-label { color: var(--muted); font-size: 12px; white-space: nowrap; }
.image-status { min-height: 24px; margin-top: 16px; font-size: 14px; color: var(--accent); text-align: center; }
.media-error { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 16px; aspect-ratio: 1.8; background: var(--soft); line-height: 1.5; padding: 24px; font-size: 15px; }
.media-error button { background: transparent; border: 1px solid var(--line); padding: 10px 18px; border-radius: var(--radius); min-height: 44px; }
.scene-loading { opacity: .6; }
.task-detail { display: none; }

.source-section { background: var(--soft) var(--studio-backdrop) center 20% / cover; }
.source-section, .questions-section, .windows-section { padding-inline: 40px; }
.source-section > .section-inner, .questions-section > .section-inner, .windows-section > .section-inner { width: min(var(--content), 100%); }
.source-layout { display: grid; grid-template-columns: 300px 1fr; align-items: center; gap: 52px; }
.source-copy h2 { font-size: 36px; line-height: 1.45; }
.source-copy p { margin-top: 22px; font-size: 16px; color: var(--photo-ink); max-width: 65ch; }
.source-action { margin-top: 18px; color: var(--photo-ink); }
.source-product .media-open { box-shadow: 0 12px 36px rgb(34 43 53 / 10%); }
.source-product figcaption { flex-wrap: wrap; gap: 4px 16px; }

.control-section { background: #fff; }
.control-heading { margin-bottom: 56px; }
.control-columns { display: grid; grid-template-columns: 1fr 1fr; max-width: 960px; margin: auto; }
.control-item { position: relative; padding: 0 56px 0 0; }
.control-item + .control-item { padding: 0 0 0 56px; border-left: 1px solid var(--line); }
.control-icon { display: block; width: 36px; height: 36px; margin-bottom: 20px; color: var(--accent); }
.control-item h3 { font-size: 24px; line-height: 1.5; }
.control-item p { color: var(--muted); font-size: 16px; max-width: 65ch; margin-top: 16px; }
.control-note { display: block; margin-top: 24px; color: var(--muted); font-size: 13px; }

.questions-section { background: var(--lavender); }
.questions-layout { display: grid; grid-template-columns: 1fr 1.3fr; gap: 80px; }
.questions-layout > h2 { font-size: 34px; line-height: 1.45; }
.questions details { border-bottom: 1px solid #d9d4d8; padding: 0 0 20px; }
.questions details + details { margin-top: 20px; }
.questions summary { list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 44px; font-size: 17px; font-weight: 600; cursor: pointer; }
.questions summary::-webkit-details-marker { display: none; }
.questions summary:hover { color: var(--accent); }
.questions summary .icon { transition: transform 180ms var(--ease); }
.questions details[open] summary .icon { transform: rotate(180deg); }
.questions details p { margin-top: 14px; max-width: 65ch; color: #605961; font-size: 15px; line-height: 1.85; }

.windows-section { background: #edf4f7 var(--studio-backdrop) center 85% / cover; padding-block: 72px; scroll-margin-top: 32px; }
.windows-layout { display: flex; align-items: center; justify-content: space-between; gap: 48px; }
.windows-brand { display: flex; align-items: center; gap: 28px; }
.windows-brand img { width: 112px; height: 112px; }
.windows-brand h2 { font-size: 36px; line-height: 1.35; }
.windows-brand p { margin-top: 16px; font-size: 15px; color: var(--photo-ink); }
.windows-action { min-width: 236px; text-align: right; }
.windows-action .unavailable { color: #465867; background: #d6e2e9; }
.windows-action > p { color: var(--photo-ink); font-size: 13px; margin-top: 14px; }
.windows-action .text-link { margin-top: 8px; font-size: 13px; color: var(--photo-ink); }
.site-footer { padding-block: 36px 24px; }
.footer-top { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.footer-top .brand { font-size: 17px; }
.footer-top nav { display: flex; gap: 28px; color: var(--muted); font-size: 14px; }
.footer-top nav a { display: inline-flex; align-items: center; min-height: 44px; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 32px; font-size: 12px; color: var(--muted); }

.image-viewer { width: min(1500px, calc(100vw - 48px)); max-width: none; max-height: calc(100svh - 48px); padding: 0; border: 0; border-radius: var(--radius); background: #fff; color: var(--ink); box-shadow: 0 24px 100px rgb(0 0 0 / 22%); }
.image-viewer::backdrop { background: rgb(15 24 34 / 65%); }
.viewer-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 12px 20px; border-bottom: 1px solid var(--line); }
.viewer-toolbar h2 { font-size: 16px; line-height: 1.6; }
.viewer-actions { display: flex; gap: 8px; flex-shrink: 0; }
.viewer-canvas { width: 100%; max-height: calc(100svh - 182px); overflow: auto; background: var(--soft); }
.viewer-canvas img { width: 100%; height: auto; max-height: calc(100svh - 182px); object-fit: contain; }
.viewer-canvas.is-zoomed img { width: auto; max-width: none; max-height: none; }
.viewer-caption { padding: 14px 20px; font-size: 12px; color: var(--muted); }

@media (max-width: 1100px) {
  .section-inner { width: calc(100% - 64px); }
  .header-inner { width: calc(100% - 64px); }
  .source-layout { grid-template-columns: 260px 1fr; gap: 32px; }
  .source-copy h2 { font-size: 32px; }
  .scene-description { grid-template-columns: 210px 1fr; gap: 16px; }
  .scene-description .demo-label { grid-column: 2; }
  .questions-layout { gap: 40px; }
  .windows-brand { gap: 20px; }
  .windows-brand h2 { font-size: 30px; }
}

@media (max-width: 767px) {
  html { scroll-padding-top: 16px; }
  .section-inner { width: calc(100% - 40px); }
  .section { padding-block: 56px; }
  .source-section, .questions-section, .windows-section { padding-inline: 20px; }
  .header-inner { width: calc(100% - 32px); height: 64px; gap: 12px; }
  .brand { gap: 8px; font-size: 18px; }
  .brand-agent { display: none; }
  .brand img { width: 32px; height: 32px; }
  .header-actions { gap: 4px; }
  .header-actions .button-small { min-height: 44px; padding-inline: 12px; font-size: 12px; gap: 5px; }
  .desktop-nav { display: none; }
  .menu-toggle { display: inline-flex; }
  .hero { padding: 32px 20px 26px; }
  .hero-intro { padding-bottom: 32px; }
  .hero-intro h1 { font-size: 48px; line-height: 1.2; }
  .hero-intro > p { font-size: 18px; margin-top: 14px; }
  .hero-actions { gap: 18px; margin-top: 24px; }
  .hero-actions .button { min-height: 48px; padding-inline: 14px; gap: 8px; font-size: 13px; }
  .hero-actions .text-link { gap: 6px; font-size: 13px; }
  .hero-product { width: 100%; }
  .product-media figcaption { display: block; margin-top: 14px; font-size: 11px; line-height: 1.75; }
  .product-media figcaption span { display: block; }
  .media-magnify { opacity: 1; width: 32px; height: 32px; bottom: 6px; right: 6px; }
  .media-magnify .icon { width: 16px; height: 16px; }
  .section-heading { margin-bottom: 28px; }
  .section-heading h2 { font-size: 30px; line-height: 1.45; }
  .section-heading p { font-size: 15px; margin-top: 16px; max-width: 65ch; }
  .scene-tabs { width: 100%; gap: 4px; margin-bottom: 24px; }
  .scene-tabs button { flex: 1; gap: 6px; min-width: 0; padding: 10px 6px; font-size: 13px; }
  .scene-tabs .icon { width: 17px; height: 17px; flex-basis: 17px; }
  .scene-description { display: block; margin-top: 20px; min-height: 137px; }
  .scene-description h3 { font-size: 20px; }
  .scene-description p { font-size: 14px; margin-top: 8px; }
  .scene-description .demo-label { display: block; margin-top: 12px; font-size: 11px; }
  .task-detail { display: block; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--line); }
  .task-detail h3 { font-size: 19px; margin-bottom: 20px; }
  .detail-images { display: grid; gap: 24px; }
  .detail-request { background: transparent; }
  .detail-files { width: min(280px, 100%); }
  .task-detail .media-open img { width: 100%; height: auto; aspect-ratio: auto; }
  .task-detail figcaption { margin-top: 16px; font-size: 11px; line-height: 1.8; color: var(--muted); }
  .source-layout { display: flex; flex-direction: column; gap: 28px; align-items: stretch; }
  .source-copy h2 { font-size: 30px; line-height: 1.45; }
  .source-copy p { font-size: 15px; margin-top: 16px; max-width: 65ch; }
  .source-action { margin-top: 12px; }
  .control-heading { margin-bottom: 36px; text-align: left; }
  .control-columns { display: block; }
  .control-item { padding: 0 0 32px; }
  .control-item + .control-item { padding: 32px 0 0; border-left: 0; border-top: 1px solid var(--line); }
  .control-icon { margin-bottom: 14px; width: 30px; height: 30px; }
  .control-item h3 { font-size: 22px; }
  .control-item p { font-size: 15px; margin-top: 12px; }
  .control-note { margin-top: 16px; }
  .questions-layout { display: block; }
  .questions-layout > h2 { font-size: 30px; margin-bottom: 28px; }
  .questions summary { font-size: 16px; }
  .questions details p { font-size: 14px; }
  .windows-section { padding-block: 48px; }
  .windows-layout { display: block; }
  .windows-brand { gap: 16px; }
  .windows-brand img { width: 72px; height: 72px; }
  .windows-brand h2 { font-size: 26px; }
  .windows-brand p { font-size: 12px; margin-top: 12px; }
  .windows-action { text-align: left; margin-top: 28px; min-width: 0; }
  .windows-action .button { width: 100%; }
  .footer-top { display: block; }
  .footer-top nav { margin-top: 16px; gap: 28px; }
  .footer-bottom { display: block; margin-top: 24px; font-size: 11px; }
  .footer-bottom span { display: block; }
  .footer-bottom span + span { margin-top: 8px; }
  .image-viewer { width: calc(100vw - 20px); max-height: calc(100svh - 24px); }
  .viewer-toolbar { padding: 8px 12px; gap: 8px; align-items: flex-start; }
  .viewer-toolbar h2 { font-size: 13px; padding-top: 9px; }
  .viewer-actions { gap: 2px; }
  .viewer-caption { padding: 12px; font-size: 11px; }
}

@media (max-width: 359px) {
  .hero-intro h1 { font-size: 42px; }
  .hero-intro > p { font-size: 16px; }
  .hero-actions { gap: 10px; }
  .hero-actions .button { padding-inline: 10px; font-size: 12px; }
  .hero-actions .text-link { font-size: 12px; gap: 4px; }
  .scene-tabs button { gap: 4px; font-size: 12px; }
  .scene-tabs .icon { width: 15px; height: 15px; flex-basis: 15px; }
  .windows-brand { align-items: flex-start; }
  .windows-brand img { width: 56px; height: 56px; }
  .windows-brand h2 { font-size: 24px; }
}

@media (min-width: 768px) and (max-height: 850px) {
  .hero { padding-top: 8px; }
  .hero-intro h1 { font-size: 56px; line-height: 1.15; }
  .hero-intro > p { font-size: 20px; }
  .hero-actions { margin-top: 14px; }
  .hero-actions .button { min-height: 44px; }
  .hero-product { width: min(1120px, calc((100svh - 390px) * 1.8), 100%); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}