:root {
  --ink: #162126;
  --muted: #53636a;
  --line: #d8e0e3;
  --paper: #fff;
  --canvas: #f5f8f8;
  --teal: #087e78;
  --teal-light: #d9f2ec;
  --coral: #bd603e;
  --night: #132025;
  --warn: #87541a;
  --danger: #a82929;
  --max-width: 1120px;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; line-break: strict; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 18px/1.75 -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", sans-serif; letter-spacing: 0; overflow-wrap: break-word; }
img { display: block; max-width: 100%; height: auto; }
figure { margin: 0; }
p { margin: 0; text-wrap: pretty; }
h1, h2, h3 { margin: 0; line-height: 1.3; letter-spacing: 0; text-wrap: balance; }
h1 { font-size: clamp(2.5rem, 5vw, 4.25rem); }
h2 { font-size: clamp(1.65rem, 3vw, 2.3rem); }
h3 { font-size: 1.18rem; }
code, .digest { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; overflow-wrap: anywhere; }
a { color: var(--teal); text-underline-offset: .22em; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid #22b7a7; outline-offset: 3px; }
.shell { width: min(calc(100% - 48px), var(--max-width)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 100; top: 10px; left: 10px; padding: 10px 14px; color: #fff; background: var(--night); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
.site-header { position: sticky; z-index: 20; top: 0; background: var(--night); color: #fff; }
.nav-row { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; min-height: 44px; color: inherit; text-decoration: none; font-size: 1.05rem; font-weight: 850; white-space: nowrap; }
.brand img { width: 34px; height: 34px; border-radius: 7px; }
.site-nav { display: flex; justify-content: flex-end; align-items: center; gap: 3px; }
.site-nav a { display: inline-flex; align-items: center; min-height: 44px; padding: 9px 12px; border-radius: 4px; color: #cad8d8; text-decoration: none; font-size: .84rem; font-weight: 750; white-space: nowrap; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: #fff; background: #304346; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 11px; min-height: 50px; padding: 11px 23px; border: 1px solid var(--night); border-radius: 4px; color: #fff; background: var(--night); text-decoration: none; font-size: .96rem; font-weight: 800; line-height: 1.3; }
.button:hover { color: #fff; border-color: #096c67; background: #096c67; }
.button.secondary { border-color: #97b7b4; color: var(--ink); background: #fff; }
.button.secondary:hover { color: var(--teal); border-color: var(--teal); background: var(--teal-light); }
.button span[aria-hidden] { font-size: 1.15em; }
.band { padding: 80px 0; border-bottom: 1px solid var(--line); }
.band.muted { background: var(--canvas); }
.section-head { display: grid; grid-template-columns: minmax(0,.9fr) minmax(0,1.1fr); gap: 45px; align-items: start; margin-bottom: 34px; }
.section-head p { max-width: 60ch; color: var(--muted); }
.section-label { color: var(--teal); font-size: .75rem; font-weight: 850; text-transform: uppercase; }
.space-top { margin-top: 16px; }
.muted-text { color: var(--muted); }
.inline-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.badge-row { display: flex; flex-wrap: wrap; gap: 8px; }
.badge { display: inline-flex; align-items: center; min-height: 30px; padding: 3px 10px; border: 1px solid #b7c6c9; color: var(--ink); background: #fff; font-size: .78rem; font-weight: 700; }
.meta { color: var(--muted); font-size: .84rem; }
.page-hero { padding: 52px 0 42px; border-bottom: 1px solid var(--line); background: var(--canvas); }
.page-hero h1 { max-width: 900px; font-size: clamp(2.25rem,4vw,3.4rem); }
.page-hero p { max-width: 68ch; margin-top: 15px; color: var(--muted); font-size: 1.04rem; }
.page-hero .meta { margin-top: 20px; }
.content { padding: 56px 0 100px; }
.content > section + section { margin-top: 64px; }
.content-grid { display: grid; grid-template-columns: minmax(170px,.26fr) minmax(0,1fr); gap: 52px; align-items: start; }
.toc { position: sticky; top: 94px; display: grid; gap: 1px; padding-left: 16px; border-left: 2px solid var(--line); font-size: .83rem; }
.toc strong { padding: 4px 0 7px; color: var(--ink); }
.toc a { display: flex; align-items: center; min-height: 39px; color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--teal); }
.article { min-width: 0; }
.article > section { padding: 5px 0 52px; scroll-margin-top: 100px; }
.article > section + section { border-top: 1px solid var(--line); padding-top: 48px; }
.article h2 { margin-bottom: 17px; }
.article h3 { margin: 24px 0 9px; }
.article p, .article li { max-width: 68ch; }
.article p + p { margin-top: 12px; }
.article ul, .article ol { margin: 15px 0; padding-left: 1.4em; }
.article li + li { margin-top: 8px; }
.guide-steps { display: grid; gap: 0; margin: 28px 0 0; padding: 0 !important; list-style: none; counter-reset: step; }
.guide-step { counter-increment: step; display: grid; grid-template-columns: minmax(0,.83fr) minmax(0,1.17fr); gap: 36px; align-items: start; padding: 35px 0; border-top: 1px solid var(--line); }
.guide-step::before { content: counter(step,decimal-leading-zero); grid-column: 1; width: fit-content; color: var(--teal); font-size: .83rem; font-weight: 850; }
.guide-copy { grid-column: 1; margin-top: -20px; }
.guide-copy h3 { margin: 0 0 10px; font-size: 1.24rem; }
.guide-copy p { color: var(--muted); }
.step-check { display: block; margin-top: 15px; padding-left: 12px; border-left: 3px solid var(--teal); font-size: .83rem; font-weight: 750; }
.guide-figure { grid-column: 2; grid-row: 1 / span 2; overflow: hidden; border: 1px solid var(--line); border-radius: 6px; background: var(--canvas); }
.guide-figure img { width: 100%; height: auto; background: #fff; }
.guide-figure figcaption { padding: 10px 13px; border-top: 1px solid var(--line); color: var(--muted); background: #fff; font-size: .77rem; }
.iphone-device { position: relative; padding: 6px 6px 0; background: #12181a; }
.iphone-device img { border-radius: 20px 20px 0 0; }
.iphone-device::before { content: ""; position: absolute; top: 16px; left: 50%; width: min(26%,120px); height: 24px; border-radius: 999px; background: #000; transform: translateX(-50%); pointer-events: none; }
.steps { margin: 22px 0; padding: 0 !important; border-top: 1px solid var(--line); list-style: none; counter-reset: n; }
.steps li { counter-increment: n; display: grid; grid-template-columns: 44px minmax(0,1fr); gap: 15px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.steps li::before { content: counter(n); width: 34px; height: 34px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--night); font-weight: 800; }
.steps strong { display: block; margin-bottom: 3px; }
.notice { padding: 16px 18px; border-left: 4px solid var(--warn); background: #fbf7f1; }
.notice.danger { border-color: var(--danger); background: #fff4f3; }
.notice.ok { border-color: var(--teal); background: #eaf8f3; }
.check-block { padding: 17px 0; border-bottom: 1px solid var(--line); }
.check-block:first-child { border-top: 1px solid var(--line); }
.check-label { display: block; color: var(--teal); font-size: .78rem; font-weight: 850; }
.check-value { display: block; margin-top: 4px; }
.metrics { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); border-block: 1px solid var(--line); }
.metric { min-height: 160px; padding: 24px; border-right: 1px solid var(--line); }
.metric:last-child { border-right: 0; }
.service-label { display: inline-flex; align-items: center; gap: 8px; font-size: .81rem; font-weight: 800; }
.service-label::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--teal); }
.service-label.claude::before { background: var(--coral); }
.metric .number { display: block; margin: 18px 0 12px; font-size: 1.6rem; line-height: 1.2; }
.metric p { color: var(--muted); font-size: .86rem; }
.path-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 0 28px; border-top: 1px solid var(--line); }
.path { min-height: 170px; padding: 24px 2px; border-bottom: 1px solid var(--line); }
.path h2, .path h3 { margin-bottom: 8px; font-size: 1.35rem; }
.path p { margin-bottom: 14px; color: var(--muted); font-size: .9rem; }
.path a { display: inline-flex; align-items: center; min-height: 38px; font-weight: 800; text-decoration: none; }
.path a::after { content: "→"; margin-left: 8px; }
.download-panel { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 24px; align-items: center; padding: 28px 30px; border: 1px solid var(--line); border-left: 5px solid var(--teal); background: #fff; }
.download-panel h2 { margin-bottom: 6px; }
.download-panel p { color: var(--muted); }
.release-data { width: 100%; margin: 23px 0; border-collapse: collapse; }
.release-data th, .release-data td { padding: 11px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.release-data th { width: 30%; color: var(--muted); font-weight: 650; }
.release-legend { display: flex; flex-wrap: wrap; gap: 10px 22px; padding: 14px 0; border-block: 1px solid var(--line); color: var(--muted); font-size: .82rem; }
.release-history { margin-top: 28px; border-top: 1px solid var(--line); }
.release-entry { padding: 30px 0; border-bottom: 1px solid var(--line); scroll-margin-top: 100px; }
.release-entry-head { display: flex; justify-content: space-between; gap: 22px; }
.release-version { font-weight: 850; }
.release-entry time { display: block; color: var(--muted); font-size: .82rem; }
.release-entry h3 { margin: 13px 0 8px; }
.release-entry ul { margin-bottom: 0; }
.release-status { display: inline-flex; align-items: center; align-self: flex-start; padding: 3px 9px; border: 1px solid var(--line); border-radius: 4px; font-size: .72rem; font-weight: 800; white-space: nowrap; }
.release-status.published { color: var(--teal); background: #e9f7f2; }
.release-status.candidate { color: var(--warn); background: #fbf7f1; }
.release-status.internal { color: var(--muted); background: var(--canvas); }
.status-table-wrap { overflow-x: auto; border: 1px solid var(--line); }
.status-table { width: 100%; min-width: 700px; border-collapse: collapse; }
.status-table th, .status-table td { padding: 12px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.status-table th { background: var(--canvas); font-size: .83rem; }
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; padding: 19px 6px; font-weight: 800; }
.faq details > div { padding: 0 6px 20px; color: var(--muted); }
.faq details p + p { margin-top: 12px; }
.support-callout { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 25px 0; border-block: 1px solid var(--line); }
.screen-frame { overflow: hidden; border: 1px solid var(--line); border-radius: 6px; background: var(--canvas); }
.screen-frame img { width: 100%; }
.back-to-top-row { display: flex; justify-content: flex-end; padding-bottom: 38px; }
.back-to-top { display: inline-flex; align-items: center; min-height: 42px; padding: 6px 12px; border: 1px solid var(--line); border-radius: 4px; color: var(--ink); text-decoration: none; font-weight: 750; }
.site-footer { padding: 52px 0 28px; color: #bdd0d0; background: var(--night); font-size: .85rem; }
.footer-row { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1.45fr); gap: 48px; }
.footer-links { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 0 20px; }
.footer-links a { display: flex; align-items: center; min-height: 37px; color: #e5eeee; }
.fine-print { margin-top: 26px; padding-top: 20px; border-top: 1px solid #385054; color: #a5b9b9; font-size: .75rem; }
.welcome { padding: 30px 0 0; border-bottom: 1px solid var(--line); }
.welcome-copy { max-width: 850px; }
.welcome-copy h1 { margin-top: 7px; font-weight: 850; }
.welcome-lead { max-width: 710px; margin-top: 18px; font-size: clamp(1.13rem,2vw,1.45rem); line-height: 1.6; }
.welcome-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.welcome-note { margin-top: 17px; color: var(--muted); font-size: .82rem; }
.real-showcase { margin: 34px 0 0; padding: 24px 0 21px; border-top: 1px solid #3c5960; }
.real-showcase img { width: min(100%,845px); height: auto; }
.real-showcase figcaption { margin-top: 12px; color: #a7c5c0; font-size: .76rem; }
.choice-band { padding-top: 20px; background: #fff; }
.choice-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.choice-grid a { position: relative; display: grid; align-content: start; gap: 9px; min-height: 205px; padding: 27px 24px 25px; border-right: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.choice-grid a:first-child { padding-left: 0; }
.choice-grid a:last-child { border-right: 0; }
.choice-grid a:hover { color: var(--teal); background: #f8fbfa; }
.choice-index { color: var(--teal); font-size: .73rem; font-weight: 850; }
.choice-grid strong { font-size: 1.24rem; line-height: 1.35; }
.choice-grid a > span:nth-child(3) { color: var(--muted); font-size: .86rem; line-height: 1.5; }
.choice-grid b { position: absolute; right: 24px; bottom: 22px; color: var(--teal); font-weight: 500; }
.platform-band { overflow: hidden; background: #eff4f3; }
.platform-layout { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,.8fr); gap: 80px; align-items: center; }
.platform-copy h2 { margin: 12px 0 18px; }
.platform-copy > p:not(.section-label) { max-width: 54ch; color: var(--muted); }
.platform-copy ul { margin: 25px 0 22px; padding-left: 1.3em; }
.platform-copy li { margin: 7px 0; }
.text-link { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; font-weight: 800; text-decoration: none; }
.platform-shot { justify-self: center; width: min(100%,280px); }
.platform-shot img { width: 100%; height: auto; box-shadow: 0 22px 55px rgba(19,32,37,.15); }
.platform-shot figcaption { margin-top: 10px; color: var(--muted); text-align: center; font-size: .72rem; }
.help-band { background: #fff; }
.help-list { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 0 32px; border-top: 1px solid var(--line); }
.help-list a { display: flex; align-items: center; justify-content: space-between; gap: 14px; min-height: 67px; border-bottom: 1px solid var(--line); color: var(--ink); text-decoration: none; font-weight: 800; }
.help-list a:hover { color: var(--teal); }
.help-list a span:last-child { color: var(--teal); }
.support-intro { padding: 47px 0 38px; border-bottom: 1px solid var(--line); }
.support-intro h1 { font-size: clamp(2.2rem,4vw,3.35rem); }
.support-intro p { max-width: 65ch; margin-top: 10px; color: var(--muted); }
.support-section { padding: 45px 0 55px; border-bottom: 1px solid var(--line); }
.support-section.soft { background: var(--canvas); }
.support-section h2 { margin-bottom: 18px; }
.support-list { border-top: 1px solid var(--line); }
.support-list a { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 20px; align-items: center; padding: 17px 3px; border-bottom: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.support-list a:hover { color: var(--teal); }
.support-list strong, .support-list small { display: block; }
.support-list strong { font-size: 1.03rem; }
.support-list small { margin-top: 2px; color: var(--muted); font-size: .8rem; }
.support-list a > span:last-child { color: var(--teal); }
.contact-strip { display: flex; justify-content: space-between; align-items: center; gap: 26px; }
.contact-strip p { max-width: 62ch; margin-top: 8px; color: var(--muted); }
.contact-strip .contact-safety { margin-top: 12px; color: var(--danger); font-size: .82rem; }
.download-lead { padding: 47px 0 41px; border-bottom: 1px solid var(--line); background: var(--canvas); }
.download-lead-grid { display: grid; grid-template-columns: minmax(0,1fr) minmax(240px,.5fr); gap: 56px; align-items: center; }
.download-lead h1 { margin: 8px 0 15px; font-size: clamp(2.2rem,4vw,3.35rem); }
.download-lead h1 span { display: inline-block; white-space: nowrap; }
.download-lead p:not(.section-label) { max-width: 61ch; color: var(--muted); }
.download-lead .badge-row { margin-top: 20px; }
.download-action { padding: 24px; border: 1px solid var(--line); border-top: 4px solid var(--teal); background: #fff; }
.download-action strong { display: block; font-size: 1.15rem; }
.download-action .button { width: 100%; margin-top: 17px; }
.download-action p { margin-top: 11px; font-size: .78rem; }
.download-flow { padding: 49px 0 60px; }
.download-flow h2 { margin-bottom: 16px; }
.download-flow .steps { margin-bottom: 0; }
.download-facts { padding: 48px 0 70px; border-top: 1px solid var(--line); background: var(--canvas); }
.download-facts h2 { margin-bottom: 16px; }
.download-facts .release-data { margin: 0 0 23px; }
@media (max-width: 950px) {
  .nav-row { display: grid; gap: 0; padding-top: 8px; }
  .site-nav { justify-content: flex-start; flex-wrap: wrap; }
  .content-grid { grid-template-columns: 1fr; gap: 26px; }
  .toc { position: static; display: flex; flex-wrap: wrap; gap: 2px 16px; padding: 9px 0; border-left: 0; border-block: 1px solid var(--line); }
  .toc strong { flex-basis: 100%; }
}
@media (max-width: 700px) {
  body { font-size: 16px; }
  .shell { width: min(calc(100% - 30px), var(--max-width)); }
  .nav-row { gap: 0; padding: 4px 0 0; }
  .brand { min-height: 34px; }
  .site-nav { width: 100%; display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 0; }
  .site-nav a { min-height: 35px; padding: 5px 2px; justify-content: center; color: #d6e1e0; font-size: .7rem; line-height: 1.25; text-align: center; white-space: normal; }
  .site-nav a:last-child { display: none; }
  .band { padding: 56px 0; }
  .section-head { display: block; margin-bottom: 25px; }
  .section-head p { margin-top: 10px; }
  .page-hero { padding: 39px 0 34px; }
  .content { padding: 34px 0 62px; }
  .article > section { padding-bottom: 40px; }
  .article > section + section { padding-top: 37px; }
  .guide-step { grid-template-columns: 1fr; gap: 15px; padding: 27px 0; }
  .guide-step::before, .guide-copy, .guide-figure { grid-column: 1; grid-row: auto; margin-top: 0; }
  .guide-figure img { max-height: none; }
  .metrics, .path-grid { grid-template-columns: 1fr; }
  .metric { min-height: 0; padding: 18px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .metric:last-child { border-bottom: 0; }
  .path { min-height: 0; }
  .download-panel { grid-template-columns: 1fr; padding: 22px; }
  .download-panel .button { width: 100%; }
  .support-callout { align-items: flex-start; flex-direction: column; }
  .release-entry-head { display: grid; gap: 8px; }
  .release-data tr { display: grid; grid-template-columns: 7em minmax(0,1fr); border-bottom: 1px solid var(--line); }
  .release-data th, .release-data td { display: block; width: auto; padding: 10px 0; border: 0; }
  .release-data td { min-width: 0; }
  .status-table-wrap { overflow: visible; border: 0; }
  .status-table { min-width: 0; }
  .status-table thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); }
  .status-table tr { display: block; padding: 14px 0; border-top: 1px solid var(--line); }
  .status-table td { display: grid; grid-template-columns: 6.5em minmax(0,1fr); gap: 10px; padding: 5px 0; border: 0; font-size: .85rem; }
  .status-table td::before { color: var(--muted); font-size: .75rem; font-weight: 800; }
  .status-table td:nth-child(1)::before { content: "表示"; }
  .status-table td:nth-child(2)::before { content: "意味"; }
  .status-table td:nth-child(3)::before { content: "確認場所"; }
  .status-table td:nth-child(4)::before { content: "次の操作"; }
  .footer-row { grid-template-columns: 1fr; gap: 22px; }
  .footer-links { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .welcome { padding-top: 24px; }
  .welcome-copy h1 { margin-top: 2px; }
  .welcome-lead { margin-top: 9px; line-height: 1.5; }
  .welcome-actions { margin-top: 15px; }
  .welcome-note { margin-top: 9px; }
  .welcome-lead br { display: none; }
  .welcome-actions .button { width: 100%; }
  .real-showcase { margin-top: 24px; padding: 18px 0; }
  .choice-grid, .help-list, .platform-layout { grid-template-columns: 1fr; }
  .choice-grid a, .choice-grid a:first-child, .choice-grid a:last-child { min-height: 125px; padding: 20px 5px; border-right: 0; border-bottom: 1px solid var(--line); }
  .choice-grid a:last-child { border-bottom: 0; }
  .choice-grid b { right: 5px; bottom: 18px; }
  .platform-layout { gap: 30px; }
  .platform-shot { width: min(100%,220px); }
  .contact-strip { align-items: flex-start; flex-direction: column; }
  .download-lead-grid { grid-template-columns: 1fr; gap: 25px; }
  .download-lead { padding: 35px 0; }
  .download-action { padding: 20px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* Shared visual language for platform pages and support documents. */
:root {
  --ink: #14252b;
  --muted: #52636a;
  --line: #d8e2e4;
  --canvas: #f2f6f6;
  --teal: #087b72;
  --teal-light: #ddf4ee;
  --coral: #ce7858;
  --night: #10262d;
  --max-width: 1160px;
}
body { line-height: 1.7; }
h1,h2,h3 { text-wrap: pretty; }
h1 { font-size: clamp(2.55rem, 5vw, 4.4rem); }
h2 { font-size: clamp(1.55rem, 2.9vw, 2.35rem); }
.shell { width: min(calc(100% - 56px), var(--max-width)); }
.site-header { background: #fff; color: var(--ink); border-bottom: 1px solid var(--line); box-shadow: 0 3px 18px rgba(16,38,45,.04); }
.nav-row { min-height: 74px; }
.site-nav { gap: 1px; }
.site-nav a { color: #485a60; border-radius: 3px; font-size: .82rem; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--teal); background: #e9f5f2; }
.site-nav a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--teal); }
.section-label { color: var(--teal); letter-spacing: .08em; }
.button { min-height: 52px; border-radius: 5px; background: #087b72; border-color: #087b72; }
.button:hover { background: #09635d; border-color: #09635d; }
.button.secondary { border-color: #a9c2c0; }
.badge { background: transparent; border-color: #becbcc; border-radius: 3px; }
.page-hero, .support-intro { padding: 58px 0 47px; background: #eaf3f2; border-bottom: 1px solid #d4e3e2; }
.page-hero h1, .support-intro h1 { max-width: 22ch; }
.page-hero p, .support-intro p { color: #455a60; }
.content-grid { grid-template-columns: 230px minmax(0,1fr); gap: clamp(38px,6vw,86px); }
.toc { top: 101px; gap: 0; padding: 0 0 0 16px; border-left: 1px solid #becfcf; font-size: .84rem; }
.toc strong { margin-bottom: 10px; color: var(--ink); font-size: .74rem; letter-spacing: .06em; }
.toc a { position: relative; min-height: 43px; padding: 5px 8px; border-radius: 3px; line-height: 1.35; }
.toc a::before { content: counter(toc,decimal-leading-zero); counter-increment: toc; display: inline-block; width: 2.4em; flex: none; color: #69827f; font-size: .72rem; font-variant-numeric: tabular-nums; }
.toc { counter-reset: toc; }
.toc a:hover, .toc a:focus-visible { background: var(--teal-light); color: var(--teal); }
.article > section:target { border-left: 3px solid var(--teal); padding-left: 18px; }
.article h2 { color: var(--ink); }
.guide-steps { gap: 0; }
.guide-step { gap: 32px; }
.guide-figure { border-radius: 5px; box-shadow: 0 12px 30px rgba(16,38,45,.08); }
.iphone-device { padding: 0; background: #fff; }
.iphone-device img { border-radius: 0; }
.iphone-device::before { display: none; }
.welcome { padding: 54px 0 0; color: #f4faf8; background: #10262d; border-bottom: 0; }
.welcome .section-label { color: #58dfc6; }
.welcome-copy { max-width: 770px; }
.welcome-copy h1 { font-size: clamp(3.15rem,6vw,5.3rem); line-height: 1.08; }
.welcome-lead { max-width: 38ch; color: #d7e7e4; }
.welcome-note { color: #a7c5c0; }
.welcome .button { background: #4ad5b6; color: #0e292e; border-color: #4ad5b6; }
.welcome .button:hover { background: #7ee5d0; }
.welcome .button.secondary { background: transparent; color: #f4faf8; border-color: #8aa7a5; }
.choice-band { background: #fff; }
.choice-grid a { transition: background .16s ease, color .16s ease; }
.choice-grid strong { font-size: 1.3rem; }
.platform-band { background: #e9f1ef; }
.platform-shot img { border: 1px solid #b8cfcc; border-radius: 4px; }
.site-footer { background: #10262d; }
.site-footer .brand { color: #fff; }

.platform-hero { overflow: hidden; padding: 66px 0 60px; color: #f3faf8; background: #10262d; }
.platform-hero-inner { display: grid; grid-template-columns: minmax(0,1.22fr) minmax(245px,.78fr); gap: clamp(38px,6vw,100px); align-items: center; }
.platform-hero .section-label { color: #62dfc8; }
.platform-hero h1 { margin: 8px 0 19px; font-size: clamp(2.8rem,5vw,4.5rem); line-height: 1.14; }
.platform-hero h1 span { display: block; }
.iphone-hero h1 span { font-size: .56em; font-weight: 650; margin-top: 8px; line-height: 1.35; }
.platform-lead { max-width: 50ch; color: #d3e5e3; font-size: 1.05rem; }
.platform-hero .badge-row { margin-top: 23px; }
.platform-hero .badge { border-color: #6e9290; color: #e0f0ed; }
.platform-hero .inline-actions { margin-top: 30px; }
.platform-hero .button { background: #50daba; border-color: #50daba; color: #0d2b2f; }
.platform-hero .button:hover { background: #8be9d5; }
.platform-hero .button.secondary { background: transparent; border-color: #86aaa6; color: #f1faf7; }
.platform-note { margin-top: 16px; color: #a7c3c1; font-size: .8rem; }
.platform-visual { justify-self: center; width: min(100%,435px); }
.platform-visual img { width: 100%; height: auto; border: 1px solid #668484; border-radius: 5px; background: #f4f7f7; box-shadow: 0 22px 55px rgba(0,0,0,.22); }
.platform-visual figcaption { margin-top: 9px; color: #b8cdca; text-align: center; font-size: .75rem; }
.phone-visual { width: min(100%,225px); }
.menu-visual { width: min(100%,480px); }
.menu-visual img { padding: 10px; background: #17292f; border-color: #527276; }
.platform-jump { position: sticky; top: 74px; z-index: 10; border-bottom: 1px solid var(--line); background: rgba(255,255,255,.97); backdrop-filter: blur(14px); }
.platform-jump .shell { display: flex; align-items: center; gap: 5px; min-height: 63px; }
.platform-jump span { margin-right: 20px; color: #62767b; font-size: .76rem; font-weight: 800; white-space: nowrap; }
.platform-jump a { display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 5px 15px; color: var(--ink); text-decoration: none; font-size: .83rem; font-weight: 780; white-space: nowrap; }
.platform-jump a:hover, .platform-jump a:focus-visible { color: var(--teal); background: var(--teal-light); }
.platform-section { padding: 73px 0; scroll-margin-top: 140px; border-bottom: 1px solid var(--line); }
.platform-section.soft { background: #f1f6f5; }
.platform-section-grid { display: grid; grid-template-columns: minmax(0,.82fr) minmax(0,1.18fr); gap: clamp(32px,6vw,96px); align-items: start; }
.platform-section h2 { margin: 7px 0 15px; }
.platform-section-grid > div:first-child > p:last-child { max-width: 40ch; color: var(--muted); }
.platform-section:target h2 { color: var(--teal); }
.platform-facts { margin: 0 0 20px; border-top: 1px solid var(--line); }
.platform-facts div { display: grid; grid-template-columns: 135px minmax(0,1fr); gap: 18px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.platform-facts dt { color: var(--muted); font-size: .85rem; }
.platform-facts dd { margin: 0; font-weight: 760; }
.platform-section .steps { margin-top: 0; }
.platform-section .steps li { padding: 19px 0; }
.feature-list { border-top: 1px solid var(--line); }
.feature-list > div { padding: 19px 0; border-bottom: 1px solid var(--line); }
.feature-list strong { display: block; font-size: 1.04rem; }
.feature-list p { margin-top: 4px; color: var(--muted); font-size: .9rem; }
.feature-list > .text-link { margin-top: 14px; }
.help-list.vertical { display: grid; grid-template-columns: 1fr; }
.file-section .release-data { margin: 0; }
.file-section .notice { margin-top: 18px; font-size: .85rem; }
.digest { font-size: .76rem; line-height: 1.5; }

@media (max-width: 950px) {
  .content-grid { grid-template-columns: 1fr; gap: 28px; }
  .toc { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 0; padding: 0; border: 1px solid var(--line); border-radius: 5px; background: #fff; }
  .toc strong { grid-column: 1 / -1; margin: 0; padding: 12px 15px; border-bottom: 1px solid var(--line); background: #f2f7f6; }
  .toc a { min-height: 47px; padding: 11px 13px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
}
@media (max-width: 700px) {
  .shell { width: min(calc(100% - 32px),var(--max-width)); }
  .nav-row { gap: 6px; padding: 8px 0; }
  .site-nav { width: 100%; grid-template-columns: repeat(6,minmax(0,1fr)); gap: 2px; }
  .site-nav a { min-height: 39px; padding: 5px 3px; font-size: .72rem; }
  .site-nav a:nth-child(-n+3) { grid-column: span 2; }
  .site-nav a:nth-child(n+4) { grid-column: span 3; }
  .site-nav a:last-child { display: inline-flex; }
  .welcome { padding-top: 30px; }
  .welcome-copy h1 { font-size: 2.8rem; }
  .welcome-lead { font-size: 1.12rem; }
  .platform-hero { padding: 37px 0 30px; }
  .platform-hero-inner { grid-template-columns: 1fr; gap: 29px; }
  .platform-hero h1 { font-size: 2.8rem; }
  .platform-hero .inline-actions { margin-top: 20px; }
  .platform-hero .button { width: 100%; }
  .platform-visual { width: min(100%,240px); }
  .menu-visual { width: 100%; }
  .iphone-hero .phone-visual { display: none; }
  .platform-jump { position: static; }
  .platform-jump .shell { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); min-height: 0; gap: 0; padding-block: 9px; }
  .platform-jump span { grid-column: 1 / -1; margin: 0; padding: 0 2px 5px; }
  .platform-jump a { min-height: 42px; padding: 5px 3px; border-right: 1px solid var(--line); font-size: .72rem; }
  .platform-jump a:last-child { border-right: 0; }
  .platform-section { padding: 53px 0; scroll-margin-top: 10px; }
  .platform-section-grid { grid-template-columns: 1fr; gap: 20px; }
  .platform-section h2 { margin-bottom: 9px; }
  .platform-facts div { grid-template-columns: 105px minmax(0,1fr); gap: 10px; }
  .toc { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .toc a { font-size: .78rem; }
  .article > section:target { padding-left: 11px; }
}
@media (max-width: 360px) {
  .site-nav a { font-size: .67rem; padding-inline: 0; }
  .toc { grid-template-columns: 1fr; }
  .platform-jump a { font-size: .67rem; }
  .platform-hero { padding: 23px 0 18px; }
  .platform-hero-inner { gap: 14px; }
  .platform-hero h1 { margin: 4px 0 10px; font-size: 2.4rem; }
  .platform-lead { font-size: .9rem; line-height: 1.5; }
  .platform-hero .badge-row { margin-top: 13px; gap: 5px; }
  .platform-hero .badge { min-height: 25px; padding: 1px 6px; font-size: .67rem; }
  .platform-hero .inline-actions { margin-top: 15px; gap: 7px; }
  .platform-hero .button { min-height: 43px; padding: 7px; }
  .platform-note { margin-top: 8px; }
}

.ios-screen-band { display: none; }
@media (max-width: 700px) {
  .ios-screen-band { display: block; padding: 54px 0; background: #e9f1ef; border-bottom: 1px solid var(--line); }
  .ios-screen-band h2 { margin: 5px 0 23px; }
  .ios-screen-band figure { width: min(100%,280px); margin-inline: auto; }
  .ios-screen-band img { width: 100%; height: auto; border: 1px solid #b8cfcc; border-radius: 5px; box-shadow: 0 18px 44px rgba(19,32,37,.12); }
.ios-screen-band figcaption { margin-top: 12px; color: var(--muted); text-align: center; font-size: .76rem; }
}

/* v1.0.33 visual system */
:root {
  --ink: #182321;
  --muted: #52615d;
  --line: #cad5d0;
  --paper: #fff;
  --canvas: #f2f6f3;
  --teal: #116f5c;
  --teal-light: #e2f4eb;
  --coral: #d5674c;
  --night: #121b19;
  --blue: #315ce5;
  --warn: #8b531f;
  --danger: #a82929;
  --max-width: 1120px;
}
body { color: var(--ink); background: var(--paper); font-size: 17px; line-height: 1.7; }
h1, h2, h3 { text-wrap: pretty; }
h1 { font-size: 4.4rem; }
h2 { font-size: 2.25rem; }
.shell { width: min(calc(100% - 56px),var(--max-width)); }
.site-header { background: var(--night); color: #f7fbf8; border: 0; box-shadow: none; }
.nav-row { min-height: 72px; }
.brand { font-size: 1rem; }
.site-nav a { color: #becbc5; background: transparent; border-radius: 0; font-size: .83rem; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: #fff; background: transparent; }
.site-nav a[aria-current="page"] { box-shadow: inset 0 -3px 0 #9ae8bb; }
.section-label { color: var(--teal); letter-spacing: 0; font-size: .75rem; font-weight: 800; }
.button { min-height: 50px; border: 1px solid var(--blue); border-radius: 4px; color: #fff; background: var(--blue); font-size: .92rem; }
.button:hover { color: #fff; border-color: #234ac8; background: #234ac8; }
.button.secondary { color: var(--ink); border-color: #9baea6; background: transparent; }
.button.secondary:hover { color: var(--ink); border-color: var(--teal); background: var(--teal-light); }
.text-link { color: var(--teal); }
.badge { border-color: #b9c9c0; background: #fff; color: #31443d; }
.page-hero, .support-intro { padding: 62px 0 53px; background: #eaf0fb; border-color: #d4dfef; }
.page-hero h1, .support-intro h1 { font-size: 3.3rem; }
.page-hero p, .support-intro p { color: #485b65; }
.content { padding-top: 58px; }
.toc { border-color: #b9cac2; }
.toc a:hover, .toc a:focus-visible { color: var(--teal); background: #e2f4eb; }
.article > section:target { border-color: var(--teal); }
.guide-figure { border-color: var(--line); border-radius: 4px; box-shadow: none; }
.notice { background: #fff8ef; }
.notice.ok { background: #edf8f1; }
.release-status.published { background: #e3f6e9; }
.welcome { padding: 62px 0 0; color: var(--ink); background: #f8faf8; border-bottom: 0; }
.welcome-main { display: grid; grid-template-columns: minmax(0,1fr) minmax(250px,.4fr); gap: 54px; align-items: end; }
.welcome .section-label { color: var(--teal); }
.welcome-copy { max-width: 880px; }
.welcome-copy h1 { margin: 10px 0 0; font-size: 4.8rem; line-height: 1.16; }
.welcome-lead { max-width: 32ch; margin-top: 19px; color: var(--ink); font-size: 1.7rem; line-height: 1.5; font-weight: 700; }
.welcome-detail { max-width: 55ch; margin-top: 13px; color: var(--muted); font-size: 1rem; }
.welcome-actions { margin-top: 28px; }
.welcome-status { padding: 0 0 3px 27px; border-left: 1px solid var(--line); }
.welcome-status p { margin-bottom: 16px; color: var(--muted); font-size: .76rem; font-weight: 800; }
.welcome-status > div { display: grid; grid-template-columns: 1fr auto; gap: 8px; padding: 15px 0; border-top: 1px solid var(--line); font-size: .82rem; }
.welcome-status strong { color: var(--teal); font-size: .78rem; }
.welcome-status > div:nth-of-type(2) strong { color: #9d4c35; }
.welcome-status a { display: inline-flex; min-height: 39px; align-items: center; gap: 9px; margin-top: 10px; color: var(--teal); font-size: .78rem; font-weight: 800; text-decoration: none; }
.welcome .button { color: #fff; background: var(--blue); border-color: var(--blue); }
.welcome .button:hover { color: #fff; background: #234ac8; border-color: #234ac8; }
.welcome .button.secondary { color: var(--ink); background: transparent; border-color: #9baea6; }
.welcome .button.secondary:hover { color: var(--ink); background: var(--teal-light); border-color: var(--teal); }
.real-showcase { margin: 48px 0 0; padding: 20px 32px 24px; color: #fff; background: var(--night); border: 0; border-top: 4px solid #7ddfad; border-radius: 0; }
.showcase-heading { display: flex; justify-content: space-between; align-items: center; gap: 20px; padding-bottom: 17px; color: #a5c8b7; font-size: .7rem; font-weight: 800; }
.real-showcase img { width: min(100%,850px); height: auto; }
.real-showcase figcaption { margin-top: 13px; color: #bfd0c7; font-size: .75rem; }
.band { padding: 74px 0; }
.section-head { gap: 60px; margin-bottom: 30px; }
.section-head h2 { margin-top: 6px; }
.section-head p { color: var(--muted); }
.choice-band { padding: 72px 0 61px; background: #edf3ef; }
.choice-grid { grid-template-columns: repeat(2,minmax(0,1fr)); border-color: #bfcfc4; }
.choice-grid a, .choice-grid a:first-child { min-height: 219px; padding: 25px 38px 27px 0; border-color: #bfcfc4; }
.choice-grid a + a { padding-left: 38px; }
.choice-grid a:hover { color: var(--ink); background: #e4eee8; }
.choice-index { color: var(--teal); }
.choice-grid strong { font-size: 2.15rem; line-height: 1.25; }
.choice-grid a > span:nth-child(3) { max-width: 38ch; color: var(--muted); font-size: .92rem; }
.choice-grid b { right: 25px; bottom: 21px; color: var(--teal); font-size: 1.6rem; }
.choice-follow { margin-top: 21px; color: var(--muted); font-size: .85rem; }
.choice-follow a { margin-left: 4px; font-weight: 800; }
.support-section .choice-grid { grid-template-columns: repeat(3,minmax(0,1fr)); }
.support-section .choice-grid a, .support-section .choice-grid a:first-child, .support-section .choice-grid a + a { min-height: 175px; padding: 22px 24px; }
.support-section .choice-grid strong { font-size: 1.45rem; }
.support-section .choice-grid a > span:nth-child(3) { font-size: .84rem; }
.platform-band { background: #eaf0fb; }
.platform-layout { grid-template-columns: minmax(0,1fr) minmax(230px,.68fr); gap: 76px; align-items: center; }
.platform-copy h2 { margin: 8px 0 16px; font-size: 2.65rem; }
.platform-copy > p:not(.section-label) { color: #475b64; }
.platform-copy ul { border-top: 1px solid #cad6e7; padding: 10px 0 0; list-style: none; }
.platform-copy li { padding: 9px 0 9px 21px; border-bottom: 1px solid #cad6e7; position: relative; }
.platform-copy li::before { content: ""; position: absolute; left: 2px; top: 20px; width: 6px; height: 6px; border-radius: 50%; background: var(--coral); }
.platform-shot { width: min(100%,255px); }
.platform-shot img { border-color: #b9c6d5; border-radius: 4px; box-shadow: 0 15px 34px rgba(25,42,67,.12); }
.platform-shot figcaption { color: #50636b; }
.help-band { background: #fff; }
.help-list { border-color: var(--line); }
.help-list a { min-height: 73px; }
.help-list a:hover, .support-list a:hover { color: var(--teal); }
.support-section.soft { background: #f0f5f2; }
.support-list a { padding: 20px 2px; }
.support-list strong { font-size: 1.03rem; }
.site-footer { background: var(--night); color: #c9d7cf; }
.site-footer .brand { color: #fff; }
.footer-links a { color: #e0e9e3; }
.fine-print { color: #a8bcb0; border-color: #3a4d43; }
.platform-hero { color: var(--ink); background: #f8faf8; border-bottom: 1px solid var(--line); padding: 60px 0 57px; }
.iphone-hero { background: #f3f7fc; }
.platform-hero .section-label { color: var(--teal); }
.platform-hero h1 { margin: 8px 0 18px; font-size: 4.2rem; line-height: 1.18; }
.iphone-hero h1 span { margin-top: 11px; font-size: .48em; color: #3d5058; }
.platform-lead { color: #465b58; font-size: 1.08rem; }
.platform-hero .badge { color: #354b42; border-color: #b9c9c0; }
.platform-hero .button { color: #fff; background: var(--blue); border-color: var(--blue); }
.platform-hero .button:hover { color: #fff; background: #234ac8; border-color: #234ac8; }
.platform-hero .button.secondary { color: var(--ink); background: transparent; border-color: #9baea6; }
.platform-hero .button.secondary:hover { color: var(--ink); background: var(--teal-light); }
.platform-note { color: #5e716b; }
.platform-visual figcaption { color: #5b6e67; }
.menu-visual img { background: var(--night); border-color: #526c60; }
.phone-visual img { border-color: #c7d4d8; box-shadow: 0 15px 34px rgba(25,42,67,.12); }
.platform-jump { position: static; border-color: var(--line); background: #fff; backdrop-filter: none; }
.platform-jump .shell { min-height: 63px; }
.platform-jump a:hover, .platform-jump a:focus-visible { background: #eaf3ed; }
.platform-section { padding: 70px 0; }
.platform-section.soft { background: #f2f6f3; }
.platform-section h2 { margin: 4px 0 14px; }
.platform-section .section-label { color: var(--teal); }
.file-section { background: #f3f7fc; }
.ios-screen-band { background: #eaf0fb; }

@media (max-width: 950px) {
  .nav-row { padding-top: 8px; }
  .content-grid { grid-template-columns: 1fr; }
  .toc { position: static; }
  .welcome-main { display: block; }
  .welcome-status { display: none; }
}
@media (max-width: 700px) {
  body { font-size: 16px; }
  .shell { width: min(calc(100% - 32px),var(--max-width)); }
  .nav-row { padding: 7px 0 0; }
  .site-nav a { color: #c8d7ce; font-size: .73rem; }
  .site-nav a[aria-current="page"] { color: #fff; }
  .band { padding: 55px 0; }
  .section-head { display: block; margin-bottom: 22px; }
  .section-head p { margin-top: 10px; }
  .welcome { padding-top: 43px; }
  .welcome-main { display: block; }
  .welcome-status { display: none; }
  .welcome-copy h1 { font-size: 2.8rem; }
  .welcome-lead { margin-top: 15px; font-size: 1.22rem; }
  .welcome-lead br { display: none; }
  .welcome-detail { font-size: .91rem; }
  .welcome-actions { margin-top: 20px; }
  .welcome-actions .button { width: 100%; }
  .real-showcase { margin-top: 31px; padding: 17px 16px 19px; }
  .showcase-heading { padding-bottom: 10px; }
  .choice-band { padding: 51px 0; }
  .choice-grid { grid-template-columns: 1fr; }
  .choice-grid a, .choice-grid a:first-child, .choice-grid a + a, .choice-grid a:last-child { min-height: 160px; padding: 22px 30px 24px 0; border-right: 0; border-bottom: 1px solid #bfcfc4; }
  .choice-grid a:last-child { border-bottom: 0; }
  .choice-grid strong { font-size: 1.65rem; }
  .choice-grid b { right: 1px; bottom: 18px; }
  .support-section .choice-grid { grid-template-columns: 1fr; }
  .support-section .choice-grid a, .support-section .choice-grid a:first-child, .support-section .choice-grid a + a { min-height: 132px; padding: 18px 30px 18px 0; }
  .support-section .choice-grid strong { font-size: 1.35rem; }
  .platform-layout { grid-template-columns: 1fr; gap: 32px; }
  .platform-copy h2 { font-size: 2rem; }
  .platform-shot { width: min(100%,230px); }
  .platform-hero { padding: 44px 0 35px; }
  .platform-hero h1 { font-size: 2.8rem; }
  .iphone-hero h1 span { font-size: .5em; }
  .platform-hero .button { width: 100%; }
  .platform-visual { width: min(100%,260px); }
  .menu-visual { width: 100%; }
  .iphone-hero .phone-visual { display: none; }
  .platform-section { padding: 53px 0; }
  .page-hero, .support-intro { padding: 43px 0 39px; }
  .page-hero h1, .support-intro h1 { font-size: 2.25rem; }
  .content { padding-top: 32px; }
  .toc { border-color: var(--line); }
  .ios-screen-band { display: block; padding: 53px 0; }
}
@media (max-width: 360px) {
  .welcome-copy h1, .platform-hero h1 { font-size: 2.45rem; }
  .choice-grid strong { font-size: 1.5rem; }
}
/* Keep short action labels together when a Japanese paragraph wraps. */
.nowrap-link { display: inline-block; white-space: nowrap; }