/* Homepage composition: one chapter system, two surface levels, product-first hierarchy.
   Theme tokens remain in the shared palette; controls remain in their component sheets. */
.homepage {
  --section-space:72px;
  --section-gap:32px;
  --subsection-space:40px;
  --radius-feature:24px;
  --radius-card:18px;
  --card-padding:24px;
  --heading-size:clamp(32px,3.8vw,46px);
  --layout-shadow:0 12px 36px rgba(0,0,0,.10);
}
html[data-theme="light"] .homepage { --layout-shadow:0 12px 36px rgba(30,37,32,.06); }
.homepage::before { opacity:.16; }
html[data-theme] .homepage .page-wavy-background { opacity:.10; }
.homepage main { min-width:0; }
.homepage main > .home-section { padding-block:var(--section-space); border:0; background:var(--paper); }
.homepage main > .home-section.home-band { background:var(--paper-deep); border-block:1px solid var(--line); }
.homepage .section-shell, .homepage .section-shell > *, .homepage .section-heading > *, .homepage .faq-layout > * { min-width:0; }
/* One offset system: scroll-padding provides sticky-header clearance. */
.homepage main > section[id] { scroll-margin-top:0; }
.homepage .section-heading { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,.8fr); align-items:end; gap:40px; margin-bottom:var(--section-gap); }
.homepage .section-label { margin:0 0 14px; color:var(--red); font-family:var(--sans); font-size:11px; font-weight:700; line-height:1.5; letter-spacing:.12em; }
.homepage .section-heading h2, .homepage .service-copy h2, .homepage .contact-intro h2 {
  max-width:23ch; margin:0; font-family:var(--serif); font-size:var(--heading-size); font-weight:500; line-height:1.15; letter-spacing:-.035em; text-wrap:balance;
}
html[lang="zh-CN"] .homepage .section-heading h2, html[lang="zh-CN"] .homepage .service-copy h2, html[lang="zh-CN"] .homepage .contact-intro h2 { letter-spacing:-.02em; }
.homepage .section-lead { max-width:560px; margin:0; color:var(--muted); font-size:15px; line-height:1.8; }
/* Hero is the only oversized headline and the only atmospheric image-led chapter. */
.homepage .hero { display:grid; grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr); align-items:center; gap:64px; padding-block:72px 80px; }
.homepage .hero > div { min-width:0; }
.homepage .hero h1 { max-width:13ch; margin:0 0 24px; font-family:var(--serif); font-weight:500; font-size:clamp(44px,5.2vw,64px); line-height:1.08; letter-spacing:-.045em; }
html[lang="zh-CN"] .homepage .hero h1 { letter-spacing:-.025em; }
.homepage .hero-copy { max-width:540px; margin:0; color:var(--muted); font-size:16px; line-height:1.8; }
.homepage .hero-board { min-height:440px; max-width:none; width:100%; border-radius:var(--radius-feature); box-shadow:var(--layout-shadow); }
/* Products own the strongest card treatment. Supporting information stays quieter. */
.homepage .product-heading-note { flex:initial; max-width:560px; margin:0; white-space:normal; text-align:left; overflow-wrap:anywhere; font-size:14px; }
.homepage .product-feature { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1fr); overflow:hidden; border:1px solid var(--line); border-radius:var(--radius-feature); background:var(--card); box-shadow:var(--layout-shadow); }
.homepage .product-image { min-height:420px; }
.homepage .product-copy { display:flex; flex-direction:column; justify-content:center; min-width:0; padding:calc(var(--card-padding) + 12px); }
.homepage .product-copy h3 { margin:16px 0 14px; font-family:var(--serif); font-size:clamp(32px,3.3vw,40px); font-weight:500; line-height:1.1; letter-spacing:-.035em; }
.homepage .product-copy p { max-width:none; margin:0; color:var(--muted); font-size:14px; line-height:1.8; }
.homepage .product-meta { display:flex; flex-wrap:wrap; gap:10px 14px; margin-top:24px; color:var(--muted); font-size:11px; }
.homepage .product-meta span { padding-right:14px; border-right:1px solid var(--line); }
.homepage .product-meta span:last-child { padding-right:0; border-right:0; }
.homepage .product-actions { display:flex; flex-wrap:wrap; gap:10px; margin-top:24px; }
.homepage .product-small-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:24px; margin-top:24px; }
.homepage .product-small { display:grid; grid-template-columns:136px minmax(0,1fr); min-height:210px; overflow:hidden; border:1px solid var(--line); border-radius:var(--radius-card); background:var(--card); box-shadow:none; transition:border-color .2s ease, background .2s ease; }
.homepage .product-small:hover { border-color:var(--control-border); background:var(--card-strong); }
.homepage .small-copy { min-width:0; padding:var(--card-padding); }
.homepage .small-copy .development-badge { max-width:100%; }
.homepage .small-copy .status { color:var(--muted); font-size:10px; }
.homepage .small-copy h3 { margin:12px 0 10px; font-family:var(--serif); font-size:26px; font-weight:500; line-height:1.2; }
.homepage .small-copy p { min-height:0; margin:0; color:var(--muted); font-size:13px; line-height:1.8; }
.homepage .small-copy a { color:var(--red); font-size:13px; font-weight:700; }
.homepage .platform-section { margin-top:var(--subsection-space); padding-top:32px; border-top:1px solid var(--line); }
.homepage .platform-heading { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1fr); align-items:start; gap:40px; margin-bottom:24px; }
.homepage .platform-heading h3, .homepage .business-model h3 { margin:0; font-family:var(--serif); font-size:26px; font-weight:500; line-height:1.25; letter-spacing:-.025em; }
.homepage .platform-heading p, .homepage .platform-note { margin:0; color:var(--muted); font-size:13px; line-height:1.8; }
.homepage .platform-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:24px; }
.homepage .platform-card { display:flex; align-items:flex-start; gap:18px; min-width:0; padding:var(--card-padding); border:1px solid var(--line); border-radius:var(--radius-card); background:transparent; }
.homepage .platform-logo { display:grid; place-items:center; width:48px; height:48px; flex-shrink:0; }
.homepage .platform-logo img { display:block; object-fit:contain; }
.homepage .platform-logo-google img { width:40px; height:40px; }
.homepage .platform-logo-apple img { width:48px; height:48px; }
.homepage .platform-card > div:last-child { min-width:0; overflow-wrap:anywhere; }
.homepage .platform-card h4 { margin:0 0 6px; font-size:18px; font-weight:600; line-height:1.3; }
.homepage .platform-card p { margin:0 0 12px; color:var(--muted); font-size:12px; }
.homepage .platform-status { display:block; color:var(--yellow); font-size:11px; }
.homepage .platform-note { margin-top:18px; font-size:11px; }
/* About is editorial rather than another stack of competing framed cards. */
.homepage main > .about-section { padding-bottom:48px; }
.homepage .company-facts { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:24px; margin:0; padding:24px 0; border-block:1px solid var(--line); }
.homepage .company-facts > div { display:block; min-width:0; padding:0; border:0; }
.homepage .company-facts dt { display:flex; align-items:center; gap:10px; margin:0 0 8px; color:var(--faint); font-size:11px; line-height:1.5; }
.homepage .fact-symbol { display:grid; place-items:center; width:32px; height:32px; flex-shrink:0; border:1px solid var(--line); border-radius:10px; color:var(--red); background:var(--card-strong); }
.homepage .fact-symbol svg { display:block; }
.homepage .company-facts dd { margin:0; color:var(--ink); font-size:13px; line-height:1.7; overflow-wrap:anywhere; }
.homepage .business-model { margin-top:var(--subsection-space); padding:0; border:0; }
.homepage .business-model .section-label { margin-bottom:12px; }
.homepage .model-intro { max-width:860px; margin:16px 0 28px; color:var(--muted); font-size:14px; line-height:1.8; }
.homepage .model-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:28px; }
.homepage .model-grid article { min-width:0; padding:0; border:0; border-radius:0; background:transparent; }
.homepage .model-grid article + article { padding-left:28px; border-left:1px solid var(--line); }
.homepage .model-number { color:var(--red); font-size:10px; font-weight:700; letter-spacing:.1em; }
.homepage .model-grid h4 { margin:14px 0 12px; font-size:17px; line-height:1.4; font-weight:600; }
.homepage .model-grid p { margin:0; color:var(--muted); font-size:13px; line-height:1.8; }
.homepage .model-note { margin:24px 0 0; color:var(--muted); font-size:11px; line-height:1.8; }
/* Services is a continuation of the company story, not a second product card. */
.homepage main > .client-services { padding-top:0; }
.homepage .client-services .section-shell { padding-top:36px; border-top:1px solid var(--line); }
.homepage .service-strip { display:grid; grid-template-columns:minmax(0,1fr) auto; align-items:center; gap:40px; padding:0; border:0; border-radius:0; background:transparent; }
.homepage .service-copy h2 { margin-bottom:18px; }
.homepage .service-copy p { max-width:740px; margin:0; color:var(--muted); font-size:14px; line-height:1.8; }
.homepage .service-action { display:flex; flex-direction:column; align-items:center; gap:12px; width:280px; max-width:100%; }
.homepage .service-action .button { align-self:stretch; text-align:center; }
.homepage .service-email { color:var(--muted); font-size:12px; overflow-wrap:anywhere; }
.homepage .service-art { display:block; width:240px; max-width:100%; height:auto; margin-bottom:4px; color:var(--yellow); }
.homepage .visual-surface { fill:var(--card); stroke:var(--control-border); stroke-width:1.5; }
.homepage .visual-soft { fill:var(--card-soft); }
.homepage .visual-tile { fill:var(--paper-deep); }
.homepage .visual-divider { fill:none; stroke:var(--control-border); stroke-width:1.2; }
.homepage .visual-stroke { fill:none; stroke:var(--faint); stroke-width:3; stroke-linecap:round; }
.homepage .visual-code { fill:none; stroke:var(--red); stroke-width:2; stroke-linecap:round; stroke-linejoin:round; }
.homepage .visual-accent { fill:var(--red); }
.homepage .visual-highlight { fill:var(--yellow); }
.homepage .visual-muted { fill:var(--faint); }
.homepage .model-top { display:flex; align-items:center; gap:12px; margin-bottom:14px; }
.homepage .model-symbol { display:grid; place-items:center; width:36px; height:36px; flex-shrink:0; border:1px solid var(--line); border-radius:10px; color:var(--red); background:var(--card-strong); }
.homepage .model-symbol svg, .homepage .method-symbol svg { display:block; }
/* Process matches the business-model columns; its quote becomes a restrained note. */
.homepage .method-list { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:28px; margin:0; }
.homepage .method-item { position:relative; display:block; min-width:0; padding:24px; border:1px solid var(--line); border-radius:var(--radius-card); background:var(--card); }
.homepage .method-step-head { display:flex; align-items:center; justify-content:space-between; gap:16px; margin-bottom:20px; }
.homepage .method-symbol { display:grid; place-items:center; width:44px; height:44px; flex-shrink:0; border:1px solid var(--line); border-radius:12px; color:var(--yellow); background:var(--card-soft); }
.homepage .method-number { margin:0; color:var(--red); font-family:var(--sans); font-size:12px; font-weight:700; }
.homepage .method-item:not(:last-child)::after { content:""; position:absolute; top:47px; right:-29px; width:28px; border-top:1px solid var(--control-border); }
.homepage .method-item:not(:last-child)::before { content:""; position:absolute; top:44px; right:-19px; width:6px; height:6px; border-top:1px solid var(--control-border); border-right:1px solid var(--control-border); transform:rotate(45deg); }
.homepage .method-item h3 { margin:0 0 12px; font-family:var(--serif); font-size:23px; font-weight:500; line-height:1.3; }
.homepage .method-item p { margin:0; color:var(--muted); font-size:13px; line-height:1.8; }
.homepage .quote { margin-top:32px; padding:26px 28px; border:1px solid var(--line); border-inline-start:3px solid var(--red); border-radius:var(--radius-card); color:var(--ink); background:var(--card); box-shadow:none; }
.homepage .quote-mark { display:none; }
.homepage .quote blockquote { max-width:1040px; margin:0 0 16px; font-family:var(--serif); font-size:21px; line-height:1.6; letter-spacing:-.02em; }
.homepage .quote cite { display:block; margin:0; color:var(--muted); font-size:11px; font-style:normal; line-height:1.8; }
.homepage .faq-layout { display:grid; grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr); gap:64px; align-items:start; }
.homepage .faq-layout .section-heading { display:block; margin:0; }
.homepage .faq-list { max-width:none; }
.homepage .faq-list details { border-top:1px solid var(--line); }
.homepage .faq-list details:last-child { border-bottom:1px solid var(--line); }
.homepage .faq-list summary { padding:22px 4px; cursor:pointer; color:var(--ink); font-size:14px; font-weight:600; line-height:1.7; }
.homepage .faq-list summary::marker { color:var(--yellow); }
.homepage .faq-list summary:hover { color:var(--yellow); }
.homepage .faq-list details p { max-width:none; margin:0; padding:0 4px 22px 22px; color:var(--muted); font-size:13px; line-height:1.8; }
/* Contact closes the page with one feature-level surface and one clear primary action. */
.homepage main > .contact { padding-top:24px; padding-bottom:48px; }
.homepage .contact-box { display:grid; grid-template-columns:minmax(0,1fr) minmax(0,.85fr); column-gap:40px; row-gap:24px; padding:40px; border:1px solid var(--line); border-radius:var(--radius-feature); background:var(--card-strong); }
.homepage .contact-box > div { min-width:0; }
.homepage .contact-box p { max-width:none; margin:20px 0 0; color:var(--muted); font-size:14px; line-height:1.8; }
.homepage .contact-links { display:flex; flex-direction:column; align-items:flex-start; justify-content:center; gap:10px; max-width:none; margin:0; padding-left:32px; border-left:1px solid var(--line); }
.homepage .contact-link { display:flex; align-items:center; justify-content:space-between; gap:12px; width:100%; padding:8px 0 14px; border-bottom:1px solid var(--control-border); color:var(--ink); font-size:clamp(16px,2vw,22px); line-height:1.5; font-weight:600; overflow-wrap:anywhere; }
.homepage .contact-mail-icon { display:grid; place-items:center; width:36px; height:36px; flex-shrink:0; border:1px solid var(--line); border-radius:10px; color:var(--yellow); background:var(--card-soft); }
.homepage .contact-mail-icon svg { display:block; }
.homepage .contact-email-text { flex:1; min-width:0; overflow-wrap:anywhere; }
.homepage .contact-link > span:last-child { flex-shrink:0; }
.homepage .contact-actions { display:flex; flex-wrap:wrap; align-items:center; gap:10px; width:100%; margin-top:8px; }
.homepage .contact-link:hover { color:var(--red); }
.homepage .contact-links .contact-hint { margin:0; color:var(--muted); font-size:11px; }
.homepage .contact-links .project-inquiry { margin:0; align-self:center; }
.homepage .contact-actions .copy-email { align-self:center; }
.homepage .project-brief { grid-column:1 / -1; margin:0; padding-top:24px; border-top:1px solid var(--line); }
.homepage .project-brief h3 { margin:0 0 16px; font-size:13px; }
.homepage .project-brief ul { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:24px; margin:0; padding:0; list-style:none; counter-reset:brief-step; color:var(--muted); font-size:13px; line-height:1.8; }
.homepage .project-brief li { display:grid; grid-template-columns:26px minmax(0,1fr); gap:10px; align-items:start; margin:0; counter-increment:brief-step; }
.homepage .project-brief li::before { content:counter(brief-step,decimal-leading-zero); display:grid; place-items:center; min-height:26px; border:1px solid var(--line); border-radius:8px; color:var(--red); background:var(--card); font-size:10px; font-weight:700; line-height:1; }
.homepage .project-brief p { max-width:880px; margin:18px 0 0; font-size:11px; line-height:1.8; }
.homepage .contact-links .copy-status { min-height:1.65em; margin:0; color:var(--yellow); font-size:11px; }
.homepage > footer { display:grid; grid-template-columns:minmax(0,1fr) minmax(220px,.65fr); gap:32px; padding-block:28px 56px; border-top:1px solid var(--line); color:var(--muted); font-size:11px; }
.homepage .footer-main { display:flex; flex-wrap:wrap; flex-direction:row; align-items:center; gap:12px 20px; }
.homepage .footer-links { display:flex; flex-wrap:wrap; gap:8px 16px; }
.homepage .footer-links a { color:var(--muted); }
.homepage .footer-links a:hover, .homepage .footer-links a:focus-visible { color:var(--yellow); }
.homepage .footer-note { max-width:none; color:var(--faint); font-size:11px; line-height:1.8; }
@media(max-width:1000px) {
  .homepage .hero { gap:40px; }
  .homepage .product-small { grid-template-columns:112px minmax(0,1fr); }
  .homepage .small-copy { padding:22px; }
}
@media(max-width:900px) {
  .homepage .hero { grid-template-columns:1fr; gap:36px; padding-block:56px 64px; }
  .homepage .hero h1 { max-width:16ch; }
  .homepage .hero-board { min-height:380px; max-width:640px; }
  .homepage .section-heading, .homepage .platform-heading, .homepage .faq-layout { grid-template-columns:1fr; gap:20px; }
  .homepage .product-feature { grid-template-columns:1fr; }
  .homepage .product-image { min-height:350px; }
  .homepage .company-facts { grid-template-columns:repeat(2,minmax(0,1fr)); gap:24px; }
  .homepage .service-strip, .homepage .contact-box { grid-template-columns:1fr; gap:28px; }
  .homepage .service-action { display:grid; grid-template-columns:minmax(120px,.7fr) minmax(0,1fr); align-items:center; gap:10px 18px; width:100%; max-width:600px; }
  .homepage .service-art { grid-column:1; grid-row:1 / span 2; width:100%; max-width:200px; margin:0; }
  .homepage .service-action .button { grid-column:2; grid-row:1; align-self:end; }
  .homepage .service-email { grid-column:2; grid-row:2; align-self:start; font-size:11px; }
  .homepage .contact-links { padding:24px 0 0; border-left:0; border-top:1px solid var(--line); }
  .homepage .faq-layout { gap:28px; }
}
@media(max-width:760px) {
  .homepage .product-small-grid, .homepage .platform-grid { grid-template-columns:1fr; }
  .homepage .product-small { grid-template-columns:136px minmax(0,1fr); }
  .homepage .model-grid, .homepage .method-list { grid-template-columns:1fr; gap:22px; }
  .homepage .method-item:not(:last-child)::before, .homepage .method-item:not(:last-child)::after { display:none; }
  .homepage .model-grid article + article { padding:22px 0 0; border-left:0; border-top:1px solid var(--line); }
  .homepage .project-brief ul { grid-template-columns:1fr; gap:14px; }
}
@media(max-width:620px) {
  .homepage { --section-space:48px; --section-gap:24px; --subsection-space:32px; --card-padding:22px; --heading-size:32px; --radius-feature:20px; --radius-card:16px; }
  .homepage .hero { padding-block:44px 48px; gap:28px; }
  .homepage .hero h1 { max-width:14ch; font-size:42px; }
  .homepage .hero-copy, .homepage .section-lead { font-size:14px; }
  .homepage .hero-board { min-height:340px; }
  .homepage .section-label { font-size:10px; margin-bottom:12px; }
  .homepage .product-copy { padding:24px; }
  .homepage .product-copy h3 { font-size:34px; }
  .homepage .product-image { min-height:330px; }
  .homepage .product-small { grid-template-columns:104px minmax(0,1fr); }
  .homepage .small-copy { padding:20px; }
  .homepage .small-copy h3 { font-size:24px; }
  .homepage .platform-card { padding:22px; }
  .homepage main > .about-section { padding-bottom:32px; }
  .homepage .client-services .section-shell { padding-top:28px; }
  .homepage .method-item { padding:22px; }
  .homepage .quote { padding:22px; }
  .homepage .quote blockquote { font-size:19px; }
  .homepage .contact-box { padding:24px; }
  .homepage .contact-actions .project-inquiry { flex:1 1 100%; justify-content:center; }
  .homepage .project-brief { padding-top:22px; }
  .homepage main > .contact { padding-top:16px; padding-bottom:40px; }
  .homepage > footer { grid-template-columns:1fr; gap:20px; padding-block:28px max(96px,env(safe-area-inset-bottom)); }
}
@media(max-width:380px) { .homepage .product-small { grid-template-columns:88px minmax(0,1fr); } .homepage .small-copy { padding:18px; } }
@media(prefers-reduced-motion:reduce) { html[data-theme] .homepage .page-wavy-background { opacity:.06; } }