/* Foshou visual system: product photography, quiet surfaces and blue actions. */
:root {
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --line: #d2d2d7;
  --paper: #fff;
  --cream: #f5f5f7;
  --white: #fff;
  --blue: #0071e3;
  --link: #0066cc;
  --max: 1120px;
  --radius-sm: 12px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", sans-serif; line-height: 1.65; -webkit-font-smoothing: antialiased; }
[hidden] { display: none !important; }
a { color: inherit; text-underline-offset: 4px; }
button, input, select, textarea { font: inherit; }
button, select, summary { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .5; }
img, svg { max-width: 100%; }
img { height: auto; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { font-weight: 600; letter-spacing: -.025em; line-height: 1.2; text-wrap: balance; overflow-wrap: break-word; }
h1 { margin-bottom: 24px; font-size: clamp(40px, 5.2vw, 72px); }
h2 { margin-bottom: 20px; font-size: clamp(30px, 3.4vw, 48px); }
h3 { margin-bottom: 12px; font-size: 24px; }
h1 em, h2 em { font-style: normal; color: var(--muted); }
p { margin-bottom: 18px; }
.shell { width: min(calc(100% - 64px), var(--max)); margin-inline: auto; }
.narrow { max-width: 1000px; }
.section { padding-block: 88px; }
section[id], h3[tabindex] { scroll-margin-top: 90px; }
:focus-visible { outline: 3px solid #0077ed; outline-offset: 4px; }
.skip-link { position: fixed; z-index: 999; top: 8px; left: 8px; padding: 12px 18px; color: #fff; background: #1d1d1f; transform: translateY(-150%); }
.skip-link:focus { transform: none; }
.sr-only, .honeypot { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.preview-bar { padding: 7px 16px; display: flex; justify-content: center; flex-wrap: wrap; gap: 4px 12px; background: #edf4fc; color: #33475c; font-size: 12px; text-align: center; }
.site-header { position: sticky; z-index: 100; top: 0; color: var(--ink); background: rgba(255,255,255,.94); border-bottom: 1px solid rgba(0,0,0,.08); backdrop-filter: blur(20px); }
.nav-shell { min-height: 64px; display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; flex-shrink: 0; align-items: center; text-decoration: none; }
.brand-symbol { display: none; }
.brand span:last-child { display: grid; }
.brand strong { font-size: 18px; font-weight: 600; line-height: 1.2; letter-spacing: .04em; }
.brand small { margin-top: 4px; color: var(--muted); font-size: 9px; letter-spacing: .18em; line-height: 1; }
.site-nav { margin-left: auto; display: flex; align-items: center; gap: 22px; }
.site-nav a { display: inline-flex; align-items: center; min-height: 44px; color: #515154; font-size: 12px; text-decoration: none; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); }
.nav-cta { display: inline-flex; min-height: 44px; align-items: center; padding: 8px 18px; border-radius: 999px; color: #fff; background: var(--blue); font-size: 12px; text-decoration: none; }
.menu-toggle { display: none; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 11px 23px; border: 1px solid transparent; border-radius: 999px; font-size: 15px; font-weight: 500; line-height: 1.5; text-align: center; text-decoration: none; transition: background .15s ease; }
.button-accent, .button-dark { color: #fff; background: var(--blue); }
.button-accent:hover, .button-dark:hover, .nav-cta:hover { background: #0077ed; }
.button-ghost, .button-light { color: var(--link); background: transparent; border-color: var(--blue); }
.button-ghost:hover, .button-light:hover { background: #eaf3fc; }
.button.full { width: 100%; }
.text-link { display: inline-flex; align-items: center; min-height: 44px; color: var(--link); text-decoration: none; }
.text-link:hover { text-decoration: underline; }
.text-button { min-height: 44px; background: transparent; border: 0; color: var(--link); padding: 8px 0; text-decoration: underline; }
.action-row { display: flex; align-items: center; flex-wrap: wrap; gap: 12px 22px; }
.kicker, .launch-label { margin-bottom: 16px; color: var(--muted); font-size: 14px; font-weight: 500; letter-spacing: .02em; }
.kicker.dark { color: var(--muted); }
.status { display: inline-block; width: fit-content; padding: 4px 0; color: #8e4300; font-size: 12px; font-weight: 500; }
.status-open { color: #006b52; }
.section-head { display: grid; grid-template-columns: 1.2fr .8fr; align-items: end; gap: 48px; margin-bottom: 40px; }
.section-head h2 { margin-bottom: 0; }
.section-head > p { margin: 0; color: var(--muted); font-size: 17px; }
.reveal { opacity: 1; }

/* Home: one uninterrupted product stage. */
.launch-official { padding: 58px 0 42px; color: #f5f5f7; background: #000; overflow: hidden; }
.launch-official .launch-grid { display: flex; flex-direction: column; text-align: center; gap: 0; }
.launch-copy { position: relative; z-index: 1; width: 100%; max-width: 850px; margin-inline: auto; }
.launch-copy .launch-label { color: #b5b5bd; margin-bottom: 12px; }
.launch-copy h1 { margin-bottom: 12px; font-size: clamp(40px, 5.5vw, 76px); line-height: 1.08; letter-spacing: -.04em; }
.launch-copy .hero-text { margin: 0 0 22px; color: #d2d2d7; font-size: clamp(18px, 2.1vw, 26px); line-height: 1.5; }
.launch-copy .action-row { justify-content: center; }
.launch-copy .button-ghost { border: 0; color: #2997ff; padding-inline: 0; }
.launch-copy .button-ghost:hover { background: transparent; text-decoration: underline; }
.official-hero-art { width: 100%; margin: 4px 0 0; }
.official-hero-art img { display: block; width: 100%; aspect-ratio: 12 / 3.5; object-fit: cover; object-position: center 40%; }
.official-hero-art figcaption { color: #86868b; font-size: 11px; margin-top: 8px; }
.hero-footnote { max-width: 750px; margin: 16px auto 0; color: #a1a1a6; font-size: 12px; }
.notice-band { background: #f5f5f7; color: #515154; font-size: 12px; }
.notice-band .shell { min-height: 58px; display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 6px 16px; padding-block: 14px; text-align: center; }
.notice-band strong { font-weight: 500; color: var(--ink); }
.notice-band a { color: var(--link); }
.product-preview { background: #fff; }
.product-teasers { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 28px; }
.product-teasers article { min-width: 0; display: flex; flex-direction: column; align-items: flex-start; }
.teaser-art { display: flex; align-items: center; justify-content: center; width: 100%; height: 270px; margin-bottom: 28px; background: transparent; overflow: hidden; }
.teaser-art img { display: block; width: 100%; height: 100%; object-fit: contain; padding: 16px; }
.teaser-art.duo-art { background: #fafafc; }
.teaser-art:not(.duo-art) img { height: 140%; padding: 0; transform: translateY(-15%); }
.product-teasers h3 { font-size: 24px; margin: 8px 0 16px; }
.product-teasers small, .product-teasers p { color: var(--muted); font-size: 14px; }
.product-teasers .starting-price { color: var(--ink); font-weight: 500; margin-bottom: 16px; }
.product-teasers a { display: inline-flex; align-items: center; min-height: 44px; margin-top: auto; color: var(--link); font-size: 14px; text-decoration: none; }
.service-bridge { background: #f5f5f7; }
.service-bridge-grid, .process-grid, .consult-layout, .retention-grid, .split-feature, .story-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; align-items: start; }
.service-lead > p { color: var(--muted); max-width: 400px; }
.service-menu { border-top: 1px solid var(--line); }
.service-menu a { display: grid; grid-template-columns: 32px 1fr 24px; align-items: center; gap: 16px; min-height: 120px; padding: 22px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
.service-menu a > span { font-size: 12px; color: var(--muted); }
.service-menu strong, .service-menu small { display: block; }
.service-menu strong { font-size: 21px; font-weight: 500; }
.service-menu small { color: var(--muted); margin-top: 8px; font-size: 13px; }
.service-menu b { color: var(--link); font-weight: 400; }
.evidence-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 28px; }
.evidence-grid a { min-width: 0; min-height: 190px; display: flex; flex-direction: column; align-items: flex-start; padding: 24px 0; border-block: 1px solid var(--line); text-decoration: none; }
.evidence-grid small { font-size: 11px; color: var(--muted); letter-spacing: .05em; }
.evidence-grid strong { font-size: 17px; font-weight: 500; margin: 22px 0; }
.evidence-grid span { margin-top: auto; color: var(--link); font-size: 12px; }
.appointment-banner { background: #f5f5f7; padding: 64px 0; }
.appointment-banner .shell { display: flex; justify-content: space-between; align-items: center; gap: 32px; }
.appointment-banner h2 { font-size: clamp(28px, 3vw, 40px); }
.appointment-banner p { margin-bottom: 0; color: var(--muted); }

/* Shared service, information and contact pages. */
.page-hero { padding: 80px 0; background: #f5f5f7; }
.page-hero h1 { max-width: 850px; }
.page-hero .narrow > p:not(.kicker):not(.launch-label) { max-width: 720px; color: var(--muted); font-size: 19px; }
.service-page .page-hero h1 { font-size: clamp(36px, 4.8vw, 60px); }
.stop-band { padding: 20px 0; background: #fff3e6; color: #703900; font-size: 14px; }
.stop-band .shell { display: flex; gap: 16px; }
.stop-band strong { flex: 0 0 auto; }
.case-grid, .service-cards { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 32px; }
.case-grid article, .service-cards article { padding: 28px 0; border-top: 1px solid var(--line); }
.case-grid span, .service-cards span { color: var(--muted); font-size: 12px; }
.case-grid h3, .service-cards h3 { font-size: 23px; margin-top: 24px; }
.case-grid p, .service-cards p { color: var(--muted); font-size: 15px; }
.service-cards.four { grid-template-columns: repeat(4, minmax(0,1fr)); }
.process-panel, .consult-section, .retention-section, .muted-section, .evidence-section { background: #f5f5f7; }
.process-grid > div > p:not(.kicker), .number-steps p { color: var(--muted); }
.number-steps { margin: 0; padding: 0; list-style: none; }
.number-steps li { display: grid; grid-template-columns: 32px 1fr; gap: 16px; padding: 24px 0; border-top: 1px solid var(--line); }
.number-steps li:last-child { border-bottom: 1px solid var(--line); }
.number-steps span { color: var(--muted); font-size: 14px; }
.number-steps p { margin: 8px 0 0; }
.retention-grid h3 { padding-top: 24px; border-top: 1px solid var(--line); }
.retention-grid p { color: var(--muted); padding-bottom: 16px; }
.consult-form, .estimate-card { display: grid; gap: 20px; padding: 36px; background: #fff; border-radius: 24px; }
.consult-form fieldset { min-width: 0; padding: 20px 0; border: 0; border-top: 1px solid var(--line); }
.consult-form legend { padding: 0; font-size: 16px; font-weight: 600; }
.plain-list { margin: 28px 0; padding: 0; list-style: none; }
.plain-list li { border-top: 1px solid var(--line); padding: 16px 0; }
.plain-list li:last-child { border-bottom: 1px solid var(--line); }
.service-price-card { padding: 40px; min-height: 320px; display: flex; flex-direction: column; justify-content: center; border-radius: 24px; background: #f5f5f7; }
.service-price-card span { color: var(--muted); font-size: 13px; margin-bottom: 32px; }
.service-price-card strong { font-size: 30px; font-weight: 600; }
.service-price-card p { color: var(--muted); margin: 20px 0 0; }
.trade-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.story-copy { font-size: 18px; }
.story-copy p { padding-bottom: 24px; margin-bottom: 24px; border-bottom: 1px solid var(--line); }
.faq-columns, .terms-layout { display: grid; grid-template-columns: 220px minmax(0,1fr); gap: 80px; align-items: start; }
.faq-index, .terms-index { position: sticky; top: 104px; display: grid; }
.faq-index a, .terms-index a { padding: 14px 0; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 14px; text-decoration: none; }
.faq-groups section { margin-bottom: 64px; }
.faq-groups h2, .terms-copy h2 { font-size: 32px; }
.faq-groups details { border-top: 1px solid var(--line); }
.faq-groups details:last-child { border-bottom: 1px solid var(--line); }
.faq-groups summary { position: relative; list-style: none; padding: 24px 36px 24px 0; font-weight: 500; }
.faq-groups summary::-webkit-details-marker { display: none; }
.faq-groups summary::after { content: "+"; position: absolute; right: 2px; color: var(--muted); font-size: 22px; line-height: 1.2; }
.faq-groups details[open] summary::after { content: "−"; }
.faq-groups details p { color: var(--muted); padding-right: 28px; margin-bottom: 24px; }
.terms-copy section { padding-bottom: 32px; margin-bottom: 40px; border-bottom: 1px solid var(--line); }
.terms-copy p { color: #515154; }
.contact-page-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.contact-info > div { padding: 28px 0; border-top: 1px solid var(--line); }
.contact-info small { color: var(--muted); }
.contact-info h2 { font-size: 26px; line-height: 1.55; letter-spacing: 0; margin: 12px 0; }
.contact-actions { display: grid; gap: 16px; align-content: start; }
.contact-action { min-height: 150px; padding: 28px; display: flex; flex-direction: column; justify-content: center; background: #f5f5f7; border-radius: 20px; text-decoration: none; }
.contact-action small, .contact-action span { color: var(--muted); font-size: 13px; }
.contact-action strong { font-size: 24px; font-weight: 500; margin-block: 6px; }
.primary-contact { color: #fff; background: #1d1d1f; }
.primary-contact small, .primary-contact span { color: #c9c9ce; }

/* Shared forms retain native controls and validation semantics. */
.order-form { min-width: 0; padding: 36px; background: #fff; border-radius: 24px; }
.order-form fieldset { min-width: 0; margin: 0; padding: 28px 0; border: 0; border-top: 1px solid var(--line); }
.order-form fieldset:first-of-type { border-top: 0; padding-top: 0; }
.order-form legend { margin-bottom: 20px; padding: 0; font-size: 20px; font-weight: 600; }
.order-form label, .consult-form label, .estimate-card label { display: grid; min-width: 0; gap: 8px; color: #515154; font-size: 14px; font-weight: 500; }
.order-form label { margin-bottom: 20px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; }
input, select, textarea { width: 100%; min-height: 56px; padding: 14px 16px; border: 1px solid #86868b; border-radius: 12px; background: #fff; color: var(--ink); font-size: 16px; line-height: 1.5; scroll-margin-top: 110px; scroll-margin-bottom: 100px; }
select { text-overflow: ellipsis; padding-right: 30px; }
textarea { resize: vertical; }
input[aria-invalid=true], select[aria-invalid=true], textarea[aria-invalid=true] { border: 2px solid #b42318; }
.choice-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 20px; }
.choice { display: grid !important; grid-template-columns: auto 1fr; align-items: start; padding: 16px; border: 1px solid var(--line); border-radius: 12px; }
.choice input, .check input { width: 20px; min-height: 20px; height: 20px; margin: 2px 0 0; accent-color: var(--blue); }
.choice span, .choice strong, .choice small { display: block; }
.choice small { color: var(--muted); font-weight: 400; }
.check { display: grid !important; grid-template-columns: auto minmax(0,1fr); align-items: start; gap: 12px !important; margin: 24px 0; }
.check a { color: var(--link); }
.check .field-error { grid-column: 2; }
.form-note { display: block; margin: 12px 0 0; color: var(--muted); font-size: 12px; line-height: 1.7; font-weight: 400; white-space: pre-wrap; }
.form-alert { padding: 16px; border: 1px solid #e7b1a9; border-radius: 12px; color: #a5251b; background: #fff2ef; margin-bottom: 20px; }
.form-alert.success { color: #006b52; background: #edf8f4; border-color: #a7cec1; }
.field-error { display: block; color: #b42318; font-size: 13px; font-weight: 400; }
summary { min-height: 44px; }
.line-handoff { grid-column: 2; min-width: 0; padding: 32px; background: #edf4fc; border: 1px solid #b2ccea; border-radius: 24px; }
.line-handoff h3 { font-size: 26px; }
.line-handoff textarea { margin: 12px 0 20px; font-size: 14px; line-height: 1.8; }
.line-handoff [role=status] { margin-top: 18px; font-size: 14px; }
.service-handoff { margin-top: 20px; padding-top: 24px; border-top: 1px solid var(--line); }
.service-handoff textarea { margin-bottom: 20px; }
.service-handoff h3 { scroll-margin-top: 100px; }

/* Footer */
.site-footer { padding: 56px 0 28px; color: var(--muted); background: #f5f5f7; border-top: 1px solid #dedee2; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 28px; }
.footer-brand { color: var(--ink); }
.footer-grid > div > p { margin: 16px 0 0; font-size: 12px; }
.footer-grid nav { display: flex; min-width: 0; flex-wrap: wrap; gap: 16px; }
.footer-grid nav a { display: inline-flex; min-height: 44px; align-items: center; font-size: 12px; text-decoration: none; overflow-wrap: anywhere; }
.footer-meta, .copyright { grid-column: 1 / -1; margin: 0; padding-top: 20px; border-top: 1px solid var(--line); font-size: 11px; }
.copyright { border: 0; padding: 0; }
.mobile-actions { display: none; }

@media(max-width:1020px) {
  .nav-cta { display: none; }
  .js .menu-toggle { display: grid; place-content: center; gap: 6px; width: 44px; height: 44px; margin-left: auto; background: transparent; color: var(--ink); border: 0; border-radius: 8px; }
  .menu-toggle i { display: block; width: 20px; height: 2px; background: currentColor; }
  .menu-toggle[aria-expanded=true] i:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-toggle[aria-expanded=true] i:last-child { transform: translateY(-4px) rotate(-45deg); }
  .site-nav { display: none; position: absolute; top: 100%; left: 0; right: 0; margin: 0; padding: 12px 32px 24px; background: #fff; border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav.is-open { display: flex; }
  .site-nav a { min-height: 48px; font-size: 16px; border-bottom: 1px solid #e8e8ed; }
  html:not(.js) .nav-shell { flex-wrap: wrap; padding-block: 16px; gap: 16px; }
  html:not(.js) .site-header { position: static; }
  html:not(.js) .site-nav { display: grid; position: static; width: 100%; grid-template-columns: 1fr 1fr; padding: 0; border: 0; }
  .service-bridge-grid, .process-grid, .consult-layout, .retention-grid, .split-feature, .story-grid, .trade-layout { gap: 40px; }
  .evidence-grid, .service-cards.four { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .faq-columns, .terms-layout { grid-template-columns: 170px minmax(0,1fr); gap: 40px; }
  .contact-page-grid { gap: 40px; }
  .line-handoff { grid-column: 1 / -1; }
}
@media(max-width:767px) {
  body { padding-bottom: calc(68px + env(safe-area-inset-bottom)); }
  .shell { width: calc(100% - 40px); }
  .nav-shell { min-height: 56px; }
  .brand strong { font-size: 17px; }
  .brand small { font-size: 8px; }
  .section { padding-block: 56px; }
  h1 { font-size: 40px; }
  h2 { font-size: 32px; }
  .section-head { grid-template-columns: 1fr; gap: 16px; margin-bottom: 32px; }
  .section-head > p { font-size: 16px; }
  .launch-official { padding: 42px 0 26px; }
  .launch-copy h1 { font-size: clamp(34px,9vw,48px); }
  .launch-copy .hero-text { font-size: 18px; }
  .launch-copy .action-row { gap: 8px 16px; }
  .launch-copy .button { font-size: 14px; padding-inline: 20px; }
  .official-hero-art { margin-top: 20px; }
  .official-hero-art img { height: 350px; aspect-ratio: auto; object-fit: contain; }
  .hero-footnote { font-size: 11px; max-width: 300px; }
  .notice-band .shell { padding-block: 18px; }
  .product-teasers { grid-template-columns: 1fr; gap: 48px; }
  .teaser-art { height: 300px; margin-bottom: 22px; }
  .product-teasers h3 { font-size: 26px; }
  .service-bridge-grid, .process-grid, .consult-layout, .retention-grid, .split-feature, .story-grid, .trade-layout, .contact-page-grid { grid-template-columns: 1fr; gap: 32px; }
  .service-menu strong { font-size: 18px; }
  .service-menu a { grid-template-columns: 24px 1fr 16px; gap: 10px; }
  .service-menu small { font-size: 12px; }
  .evidence-grid { gap: 20px; }
  .evidence-grid a { min-height: 185px; }
  .evidence-grid strong { font-size: 15px; }
  .appointment-banner { padding: 48px 0; }
  .appointment-banner .shell { align-items: flex-start; flex-direction: column; }
  .page-hero { padding-block: 52px; }
  .service-page .page-hero h1 { font-size: 36px; }
  .page-hero .narrow > p:not(.kicker):not(.launch-label) { font-size: 17px; }
  .stop-band .shell { flex-direction: column; gap: 4px; }
  .case-grid, .service-cards, .service-cards.four { grid-template-columns: 1fr; gap: 12px; }
  .case-grid article, .service-cards article { padding-block: 24px; }
  .consult-form, .estimate-card, .order-form { padding: 24px 20px; border-radius: 20px; }
  .service-price-card { min-height: 260px; padding: 28px; }
  .faq-columns, .terms-layout { grid-template-columns: 1fr; gap: 36px; }
  .faq-index, .terms-index { position: static; }
  .faq-groups h2, .terms-copy h2 { font-size: 28px; }
  .contact-info h2 { font-size: 23px; }
  .form-grid, .choice-grid { grid-template-columns: 1fr; }
  .line-handoff { padding: 24px 20px; }
  .line-handoff .action-row > * { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; align-items: start; }
  .mobile-actions { position: fixed; z-index: 90; inset: auto 0 0; display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 10px 20px calc(10px + env(safe-area-inset-bottom)); min-height: 68px; border-top: 1px solid var(--line); background: rgba(255,255,255,.96); backdrop-filter: blur(20px); }
  .mobile-actions a { display: flex; align-items: center; justify-content: center; min-height: 44px; font-size: 14px; text-decoration: none; color: var(--link); }
  .mobile-actions a:last-child { padding: 10px 24px; border-radius: 999px; color: #fff; background: var(--blue); }
}
@media(prefers-reduced-motion:reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}
@media print {
  .site-header, .preview-bar, .mobile-actions { display: none !important; }
  body { padding: 0; color: #000; background: #fff; }
  .launch-official, .page-hero, .process-panel, .retention-section { color: #000; background: #fff; }
}
.seller-meta{grid-column:1/-1;margin:0;color:var(--muted,#60646b);font-size:.75rem;line-height:1.65}