.km {
  --km-ink: #0a1733;
  --km-copy: #38465f;
  --km-muted: #69788f;
  --km-blue: #0874f9;
  --km-blue-deep: #075ed0;
  --km-aqua: #03bdb8;
  --km-pink: #f75c98;
  --km-orange: #f27a08;
  --km-purple: #7657d8;
  --km-sky: #eff7ff;
  --km-line: #dce8f6;
  width: 100vw;
  margin-left: calc(50% - 50vw);
  overflow: clip;
  background: #f8fbff;
  color: var(--km-ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.82;
  -webkit-font-smoothing: antialiased;
  overflow-wrap: anywhere;
}

.km *, .km *::before, .km *::after { box-sizing: border-box; }
.km a { color: inherit; text-decoration: none; }
.km img, .km video { max-width: 100%; height: auto; }
.km h1, .km h2, .km h3, .km p { margin-top: 0; }
.km h1, .km h2, .km h3 { color: var(--km-ink); font-weight: 900; letter-spacing: -.028em; }
.km-container { width: min(1120px, calc(100% - 40px)); margin-inline: auto; }

.km-header { border-bottom: 1px solid var(--km-line); background: rgba(255,255,255,.94); backdrop-filter: blur(14px); }
.km-header-inner { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.km-brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 950; letter-spacing: .02em; }
.km-brand img { width: 40px; height: 40px; }
.km-brand-name { white-space: nowrap; }
.km-header-links { display: flex; align-items: center; gap: 22px; color: var(--km-copy); font-size: .9rem; font-weight: 750; }

.km-button { min-height: 44px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 8px 20px; border: 2px solid transparent; border-radius: 999px; background: linear-gradient(135deg,var(--km-blue),#0962d6); color: #fff !important; font-weight: 900; line-height: 1.35; box-shadow: 0 10px 24px rgba(8,116,249,.2); transition: transform 150ms ease, box-shadow 150ms ease; }
.km-button:hover { transform: translateY(-1px); box-shadow: 0 14px 30px rgba(8,116,249,.28); }
.km-button--small { min-height: 40px; padding: 7px 17px; font-size: .86rem; }
.km-button--ghost { border-color: var(--km-line); background: #fff; color: var(--km-ink) !important; box-shadow: none; }
.km-button:focus-visible, .km-toc a:focus-visible, .km-faq summary:focus-visible, .km-inline-link:focus-visible { outline: 3px solid rgba(8,116,249,.32); outline-offset: 4px; }

.km-intro { padding: 50px 0 44px; border-bottom: 1px solid var(--km-line); background: radial-gradient(circle at 8% 12%,rgba(3,189,184,.13),transparent 24%),radial-gradient(circle at 92% 18%,rgba(247,92,152,.1),transparent 24%),#fff; }
.km-breadcrumb { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 24px; color: var(--km-muted); font-size: .82rem; font-weight: 700; }
.km-kicker { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 12px; color: var(--km-blue-deep); font-size: .8rem; font-weight: 950; letter-spacing: .11em; }
.km-kicker::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--km-aqua); box-shadow: 0 0 0 5px rgba(3,189,184,.13); }
.km-intro h1 { max-width: 880px; margin-bottom: 15px; font-size: clamp(2rem,5vw,3.45rem); line-height: 1.2; }
.km-lead { max-width: 820px; margin-bottom: 0; color: var(--km-copy); font-size: 1.04rem; }
.km-meta { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 18px; color: var(--km-muted); font-size: .82rem; font-weight: 700; }
.km-quick { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; margin-top: 28px; }
.km-quick > div { padding: 17px 19px; border: 1px solid var(--km-line); border-radius: 17px; background: rgba(255,255,255,.92); box-shadow: 0 10px 26px rgba(10,23,51,.05); }
.km-quick small { display: block; color: var(--km-blue); font-size: .73rem; font-weight: 950; }
.km-quick strong { display: block; margin-top: 3px; font-size: .96rem; line-height: 1.45; }

.km-layout { display: grid; grid-template-columns: 230px minmax(0,1fr); align-items: start; gap: 42px; padding: 46px 0 92px; }
.km-toc { position: sticky; top: 24px; padding: 21px; border: 1px solid var(--km-line); border-radius: 20px; background: #fff; box-shadow: 0 12px 28px rgba(10,23,51,.055); }
.km-toc-title { margin-bottom: 11px; color: var(--km-muted); font-size: .77rem; font-weight: 950; letter-spacing: .09em; }
.km-toc ol { display: grid; gap: 4px; margin: 0; padding: 0; list-style: none; counter-reset: km-toc; }
.km-toc li { counter-increment: km-toc; }
.km-toc a { display: grid; grid-template-columns: 24px 1fr; gap: 6px; padding: 8px 6px; border-radius: 9px; color: var(--km-copy); font-size: .85rem; font-weight: 750; line-height: 1.45; }
.km-toc a::before { content: counter(km-toc,decimal-leading-zero); color: var(--km-blue); font-size: .69rem; font-weight: 950; }
.km-toc a:hover { background: var(--km-sky); color: var(--km-blue-deep); }

.km-section { margin-bottom: 30px; padding: 31px; border: 1px solid var(--km-line); border-radius: 22px; background: #fff; box-shadow: 0 13px 34px rgba(10,23,51,.05); scroll-margin-top: 24px; }
.km-section:last-child { margin-bottom: 0; }
.km-section-label { display: block; margin-bottom: 4px; color: var(--km-blue); font-size: .75rem; font-weight: 950; letter-spacing: .1em; }
.km-section h2 { margin-bottom: 10px; font-size: clamp(1.45rem,3vw,1.9rem); line-height: 1.35; }
.km-section > p { color: var(--km-copy); }
.km-section h3 { margin: 22px 0 8px; font-size: 1.08rem; }

.km-steps { display: grid; gap: 12px; margin: 19px 0 0; padding: 0; list-style: none; counter-reset: km-step; }
.km-steps > li { position: relative; min-height: 42px; padding: 7px 0 7px 51px; color: var(--km-copy); counter-increment: km-step; }
.km-steps > li::before { content: counter(km-step); position: absolute; top: 3px; left: 0; width: 36px; height: 36px; display: grid; place-items: center; border: 2px solid #cce4ff; border-radius: 12px; background: var(--km-sky); color: var(--km-blue); font-size: .82rem; font-weight: 950; }

.km-card-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; margin-top: 18px; }
.km-card-grid--3 { grid-template-columns: repeat(3,minmax(0,1fr)); }
.km-card { min-width: 0; padding: 18px; border: 1px solid var(--km-line); border-radius: 16px; background: #fbfdff; }
.km-card small { display: block; color: var(--km-blue); font-size: .72rem; font-weight: 950; }
.km-card strong { display: block; margin-top: 3px; font-size: .95rem; }
.km-card p { margin: 5px 0 0; color: var(--km-muted); font-size: .82rem; }
a.km-card { display: block; transition: border-color .15s, box-shadow .15s; }
a.km-card:hover, a.km-card:focus-visible { border-color: var(--km-blue); box-shadow: 0 10px 26px rgba(10,23,51,.07); }

.km-callout { position: relative; margin-top: 19px; padding: 17px 19px 17px 50px; border: 1px solid #cfe1f7; border-radius: 16px; background: #f3f8fe; color: var(--km-copy); font-size: .9rem; }
.km-callout::before { content: "i"; position: absolute; top: 16px; left: 18px; width: 23px; height: 23px; display: grid; place-items: center; border-radius: 50%; background: var(--km-blue); color: #fff; font-size: .76rem; font-weight: 950; }
.km-callout--important { border-color: #ffd1e2; background: #fff3f7; }
.km-callout--important::before { content: "!"; background: var(--km-pink); }
.km-callout--tip { border-color: #b9e9e5; background: #effbf9; }
.km-callout--tip::before { content: "✓"; background: var(--km-aqua); }
.km-callout p:last-child { margin-bottom: 0; }
.km-path { display: inline-flex; flex-wrap: wrap; align-items: center; gap: 7px; margin-top: 8px; padding: 8px 12px; border: 1px solid var(--km-line); border-radius: 11px; background: #f7faff; color: var(--km-copy); font-size: .83rem; font-weight: 800; }
.km-path span { color: #90a1b8; }
.km-inline-link { color: var(--km-blue-deep) !important; font-weight: 850; text-decoration: underline !important; text-underline-offset: 3px; }

/* 実画面キャプチャー。画像自体へ文字を書き込まず、番号はHTMLで重ねる。 */
.km-shot { position: relative; margin: 22px 0 0; padding: 10px; border: 1px solid var(--km-line); border-radius: 20px; background: #f3f7fc; box-shadow: 0 14px 34px rgba(10,23,51,.08); }
.km-shot__link { position: relative; display: block; overflow: hidden; border: 1px solid #cfdeee; border-radius: 13px; background: #fff; }
.km-shot__link::after { content: "拡大"; position: absolute; right: 10px; bottom: 10px; padding: 5px 9px; border: 1px solid rgba(255,255,255,.7); border-radius: 999px; background: rgba(10,23,51,.82); color: #fff; font-size: .68rem; font-weight: 900; letter-spacing: .04em; }
.km-shot__link:focus-visible { outline: 3px solid rgba(8,116,249,.32); outline-offset: 4px; }
.km-shot img { display: block; width: 100%; height: auto; }
.km-shot__number { position: absolute; z-index: 2; top: var(--km-marker-top,18px); left: var(--km-marker-left,18px); min-width: 32px; height: 32px; display: grid; place-items: center; padding-inline: 7px; border: 2px solid #fff; border-radius: 999px; background: var(--km-blue); color: #fff; box-shadow: 0 5px 14px rgba(10,23,51,.25); font-size: .78rem; font-weight: 950; line-height: 1; }
.km-shot figcaption { display: flex; gap: 9px; align-items: flex-start; padding: 11px 4px 2px; color: var(--km-muted); font-size: .8rem; line-height: 1.65; }
.km-shot figcaption::before { content: "画面"; flex: 0 0 auto; color: var(--km-blue-deep); font-size: .69rem; font-weight: 950; letter-spacing: .08em; }
.km-shot-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; margin-top: 22px; }
.km-shot-grid .km-shot { min-width: 0; margin-top: 0; }
.km-shot--phone { width: min(420px,100%); margin-inline: auto; }

.km-faq details { border-top: 1px solid var(--km-line); }
.km-faq details:last-child { border-bottom: 1px solid var(--km-line); }
.km-faq summary { position: relative; min-height: 60px; padding: 17px 43px 17px 2px; cursor: pointer; font-weight: 900; list-style: none; }
.km-faq summary::-webkit-details-marker { display: none; }
.km-faq summary::after { content: "+"; position: absolute; top: 50%; right: 4px; width: 29px; height: 29px; display: grid; place-items: center; transform: translateY(-50%); border-radius: 50%; background: var(--km-sky); color: var(--km-blue); line-height: 1; }
.km-faq details[open] summary::after { content: "−"; }
.km-faq-answer { padding: 0 43px 20px 2px; color: var(--km-copy); }
.km-faq-answer p:last-child { margin-bottom: 0; }

.km-related { background: var(--km-ink); color: #fff; }
.km-related h2 { color: #fff; font-size: 1.35rem; }
.km-related-links { display: flex; flex-wrap: wrap; gap: 9px; }
.km-related-links a { padding: 8px 13px; border: 1px solid rgba(255,255,255,.2); border-radius: 999px; color: #e8f2ff; font-size: .82rem; font-weight: 800; }
.km-conversion { padding: 0 0 72px; background: #f8fbff; }
.km-conversion-inner { display: grid; grid-template-columns: minmax(0,1fr) auto; align-items: center; gap: 36px; padding: 34px; border-radius: 24px; background: linear-gradient(135deg,#edf7ff,#f2fbfa); box-shadow: 0 14px 36px rgba(10,23,51,.07); }
.km-conversion h2 { margin-bottom: 8px; font-size: clamp(1.45rem,3vw,2rem); line-height: 1.35; }
.km-conversion p { margin-bottom: 0; color: var(--km-copy); }
.km-conversion-actions { display: flex; flex-direction: column; gap: 10px; min-width: 250px; }
.km-footer { padding: 33px 0 39px; border-top: 1px solid var(--km-line); background: #fff; }
.km-footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.km-footer small { color: var(--km-muted); font-size: .76rem; }
.km-footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 10px 20px; color: var(--km-muted); font-size: .8rem; font-weight: 700; }

@media (max-width: 900px) {
  .km-layout { grid-template-columns: 1fr; gap: 24px; }
  .km-toc { position: static; }
  .km-toc ol { grid-template-columns: repeat(3,minmax(0,1fr)); }
}

@media (max-width: 680px) {
  .km { overflow-x: hidden; }
  .km-container { width: min(100% - 24px,1120px); }
  .km-header-inner { min-height: 62px; gap: 10px; }
  .km-brand img { width: 36px; height: 36px; }
  .km-brand-name { font-size: .9rem; }
  .km-brand-detail { display: none; }
  .km-header-links > a:not(.km-button) { display: none; }
  .km-header-links { gap: 0; }
  .km-button--small { min-height: 44px; padding-inline: 14px; }
  .km-intro { padding: 30px 0; }
  .km-breadcrumb { margin-bottom: 18px; }
  .km-intro h1 { font-size: clamp(2rem,10vw,2.5rem); }
  .km-lead { font-size: 1rem; }
  .km-meta { display: grid; gap: 4px; }
  .km-quick { grid-template-columns: 1fr; gap: 8px; margin-top: 23px; }
  .km-quick > div { padding: 13px 15px; }
  .km-layout { padding: 28px 0 68px; }
  .km-toc { margin-inline: -12px; padding: 16px 12px; overflow-x: auto; border-right: 0; border-left: 0; border-radius: 0; box-shadow: none; scrollbar-width: thin; -webkit-overflow-scrolling: touch; }
  .km-toc-title { margin: 0 0 10px 4px; }
  .km-toc ol { display: flex; width: max-content; max-width: none; gap: 8px; }
  .km-toc a { min-height: 44px; display: flex; align-items: center; padding: 9px 13px; border: 1px solid var(--km-line); border-radius: 999px; background: #fff; white-space: nowrap; }
  .km-section { padding: 24px 19px; border-radius: 19px; }
  .km-section h2 { font-size: clamp(1.4rem,7vw,1.7rem); }
  .km-card-grid, .km-card-grid--3 { grid-template-columns: 1fr; }
  .km-shot { margin-inline: -7px; padding: 5px; border-radius: 16px; }
  .km-shot__link { border-radius: 11px; }
  .km-shot__link::after { right: 7px; bottom: 7px; }
  .km-shot__number { top: var(--km-marker-top,11px); left: var(--km-marker-left,11px); min-width: 30px; height: 30px; }
  .km-shot figcaption { padding: 10px 7px 4px; }
  .km-shot-grid { grid-template-columns: 1fr; }
  .km-callout { padding: 49px 17px 17px; }
  .km-callout::before { top: 16px; left: 17px; }
  .km-button { width: 100%; }
  .km-related-links { display: grid; }
  .km-related-links a { min-height: 44px; display: flex; align-items: center; padding: 10px 14px; border-radius: 13px; }
  .km-conversion { padding-bottom: 48px; }
  .km-conversion-inner { grid-template-columns: 1fr; gap: 22px; padding: 27px 20px; border-radius: 20px; }
  .km-conversion-actions { min-width: 0; }
  .km-footer-inner { display: block; }
  .km-footer-links { justify-content: flex-start; margin-top: 15px; }
  .km-footer-links a { min-height: 44px; display: inline-flex; align-items: center; }
}

@media (max-width: 360px) {
  .km-brand img { width: 32px; height: 32px; }
  .km-brand { gap: 7px; }
  .km-brand-name { font-size: .84rem; }
  .km-button--small { padding-inline: 12px; font-size: .8rem; }
}

@media (hover: none) { .km-button:hover { transform: none; } }
@media (prefers-reduced-motion: reduce) { .km *, .km *::before, .km *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; } }