/* YORUQ corporate site (plan B) - stylesheet
   White canvas, two tinted surfaces (pale blue / pale green), one clear blue accent.
   Component shapes: compact 8px radius buttons (outline / filled), 14px radius blocks,
   bento grid, abstract product-UI mocks built from CSS only. */

:root {
  --c-text: #273244;
  --c-sub: #5b6676;
  --c-line: #e1e7ef;
  --c-line-strong: #c6d0dd;
  --c-bg: #ffffff;
  --c-surface: #f4f7fb;
  --c-tint: #eef5fc;
  --c-tint-strong: #e3eefb;
  --c-tint2: #e6f6ef;
  --c-tint2-strong: #d3efe2;
  --c-tint2-text: #1c7a5a;
  --c-accent: #1e5fcc;
  --c-accent-hover: #174da8;

  --f-en: "Plus Jakarta Sans", "Helvetica Neue", Arial, sans-serif;
  --f-ja: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;

  --w-max: 1120px;
  --w-narrow: 760px;
  --pad: 20px;
  --head-h: 64px;
  --r-s: 8px;
  --r-m: 14px;
  --r-l: 20px;

  --fs-12: 0.75rem;
  --fs-13: 0.8125rem;
  --fs-14: 0.875rem;
  --fs-15: 0.9375rem;
  --fs-16: 1rem;
  --fs-18: 1.125rem;
  --fs-20: 1.25rem;
  --fs-24: 1.5rem;
  --fs-28: 1.75rem;
  --fs-32: 2rem;
  --fs-40: 2.5rem;
}

@media (min-width: 768px) {
  :root { --pad: 40px; --head-h: 76px; }
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--c-text);
  background: var(--c-bg);
  font-family: var(--f-ja);
  font-size: var(--fs-16);
  line-height: 1.85;
  letter-spacing: 0.01em;
  font-feature-settings: "palt";
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, p, ul, ol, dl, dd, figure, table { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }

:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: no-preference) {
  a, button, .yb-drawer { transition: color .2s, background-color .2s, border-color .2s, transform .25s ease, opacity .25s ease; }
}

.yb-sr {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

.yb-skip {
  position: absolute; left: 8px; top: -100px; z-index: 200;
  padding: 8px 14px; background: var(--c-bg); color: var(--c-accent);
  border: 1px solid var(--c-accent); border-radius: var(--r-s); font-size: var(--fs-14);
}
.yb-skip:focus { top: 8px; }

/* ---------- layout ---------- */
.yb-wrap { width: 100%; max-width: calc(var(--w-max) + var(--pad) * 2); margin: 0 auto; padding-left: var(--pad); padding-right: var(--pad); }
.yb-wrap--narrow { max-width: calc(var(--w-narrow) + var(--pad) * 2); }
.yb-section { padding: 64px 0; }
.yb-section--tint { background: var(--c-tint); }
.yb-section--tint2 { background: var(--c-tint2); }
.yb-space { height: 64px; }
@media (min-width: 768px) {
  .yb-section { padding: 104px 0; }
  .yb-space { height: 100px; }
}

/* ---------- typography ---------- */
.yb-en { font-family: var(--f-en); font-feature-settings: "tnum"; }
.yb-label {
  font-family: var(--f-en);
  font-size: var(--fs-13);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 10px;
}
.yb-h2 {
  font-size: var(--fs-28);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.01em;
}
@media (min-width: 768px) {
  .yb-h2 { font-size: var(--fs-32); }
}
.yb-sechead { margin-bottom: 32px; }
@media (min-width: 768px) { .yb-sechead { margin-bottom: 44px; } }

/* ---------- buttons / links ---------- */
.yb-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 52px; padding: 0 28px;
  border-radius: var(--r-s);
  border: 1.5px solid var(--c-text);
  background: var(--c-bg);
  color: var(--c-text);
  font-size: var(--fs-15); font-weight: 700; letter-spacing: 0.02em;
  text-align: center;
}
.yb-btn:hover { background: var(--c-surface); }
.yb-btn--outline { border-color: var(--c-line-strong); }
.yb-btn--outline:hover { border-color: var(--c-text); background: var(--c-bg); }
.yb-btn--primary { background: var(--c-accent); border-color: var(--c-accent); color: #fff; }
.yb-btn--primary:hover { background: var(--c-accent-hover); border-color: var(--c-accent-hover); color: #fff; }
.yb-btn--sm { min-height: 40px; padding: 0 18px; font-size: var(--fs-14); }
.yb-btn--block { display: flex; width: 100%; }
.yb-btn--ext::after { content: "\2197"; font-family: var(--f-ja); font-size: 0.95em; line-height: 1; }

.yb-link {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--c-accent); font-weight: 700; font-size: var(--fs-15);
}
.yb-link::after {
  content: ""; width: 7px; height: 7px;
  border-top: 2px solid currentColor; border-right: 2px solid currentColor;
  transform: rotate(45deg);
}
.yb-link--ext::after { content: "\2197"; border: 0; width: auto; height: auto; transform: none; font-family: var(--f-ja); font-size: 0.95em; line-height: 1; }
.yb-link:hover { color: var(--c-accent-hover); text-decoration: underline; text-underline-offset: 4px; }
.yb-more { margin-top: 24px; }

/* ---------- header ---------- */
.yb-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--c-line);
}
.yb-header__in { display: flex; align-items: center; gap: 24px; height: var(--head-h); }
.yb-brand { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; }
.yb-nb { display: inline-block; }
.yb-brand__mark {
  width: 30px; height: 30px; border-radius: 8px; background: var(--c-accent); color: #fff;
  font-family: var(--f-en); font-weight: 800; font-size: 17px; line-height: 30px; text-align: center; flex: none;
}
.yb-brand__name { font-family: var(--f-en); font-weight: 800; font-size: 19px; letter-spacing: 0.04em; }
.yb-brand__co { font-size: var(--fs-12); color: var(--c-sub); margin-left: 4px; display: none; }
.yb-nav { display: none; margin-left: auto; }
.yb-nav ul { display: flex; gap: 4px; }
.yb-nav a {
  display: inline-block; padding: 8px 14px; border-radius: 999px;
  font-size: var(--fs-14); font-weight: 500; color: var(--c-text);
}
.yb-nav a:hover { background: var(--c-surface); }
.yb-nav a[aria-current="page"] { color: var(--c-accent); font-weight: 700; }
.yb-header__cta { display: none; }
.yb-menu {
  margin-left: auto; width: 44px; height: 44px; border-radius: var(--r-s);
  border: 1.5px solid var(--c-line-strong); display: grid; place-items: center;
}
.yb-menu__bars, .yb-menu__bars::before, .yb-menu__bars::after {
  display: block; width: 18px; height: 2px; background: var(--c-text); border-radius: 2px; content: "";
}
.yb-menu__bars { position: relative; }
.yb-menu__bars::before { position: absolute; top: -6px; }
.yb-menu__bars::after { position: absolute; top: 6px; }
.yb-menu[aria-expanded="true"] .yb-menu__bars { background: transparent; }
.yb-menu[aria-expanded="true"] .yb-menu__bars::before { top: 0; transform: rotate(45deg); }
.yb-menu[aria-expanded="true"] .yb-menu__bars::after { top: 0; transform: rotate(-45deg); }

@media (min-width: 960px) {
  .yb-brand__co { display: inline; }
  .yb-nav { display: block; }
  .yb-header__cta { display: inline-flex; }
  .yb-menu { display: none; }
}

/* ---------- drawer ---------- */
.yb-drawer {
  position: fixed; inset: var(--head-h) 0 0 0; z-index: 90;
  background: var(--c-bg);
  padding: 16px var(--pad) 40px;
  overflow-y: auto;
  opacity: 0; visibility: hidden; transform: translateY(-8px);
}
.yb-drawer.is-open { opacity: 1; visibility: visible; transform: none; }
body.yb-menu-open { overflow: hidden; }
.yb-drawer nav ul li a {
  display: block; padding: 16px 4px; font-size: var(--fs-18); font-weight: 700;
  border-bottom: 1px solid var(--c-line);
}
.yb-drawer nav ul li a[aria-current="page"] { color: var(--c-accent); }
.yb-drawer__sub { display: flex; flex-wrap: wrap; gap: 0 20px; padding: 12px 4px 16px; }
.yb-drawer__sub a { display: inline-block; padding: 12px 0; font-size: var(--fs-14); color: var(--c-sub); }
@media (min-width: 960px) { .yb-drawer { display: none; } }

/* ---------- hero ---------- */
.yb-hero { padding: 40px 0 56px; background: linear-gradient(180deg, var(--c-tint) 0%, var(--c-bg) 100%); }
.yb-hero__grid { display: grid; gap: 40px; align-items: center; }
.yb-hero__title {
  font-size: clamp(1.75rem, 1.15rem + 2.4vw, 2.625rem);
  font-weight: 700; line-height: 1.4; letter-spacing: 0.01em;
}
.yb-hero__title span { display: inline-block; }
.yb-hero__title em { font-style: normal; color: var(--c-accent); }
.yb-hero__lead { margin-top: 20px; font-size: var(--fs-16); color: var(--c-sub); max-width: 34em; }
.yb-hero__actions { display: flex; flex-direction: column; gap: 12px; margin-top: 28px; }
.yb-hero__visual { position: relative; padding-bottom: 86px; }
@media (min-width: 560px) {
  .yb-hero__actions { flex-direction: row; }
}
@media (min-width: 960px) {
  .yb-hero { padding: 88px 0 104px; }
  .yb-hero__grid { grid-template-columns: 1.05fr 1fr; gap: 56px; }
  .yb-hero__lead { font-size: var(--fs-18); }
}

/* ---------- abstract product UI (CSS only) ---------- */
.yb-ui {
  background: var(--c-bg); border: 1px solid var(--c-line); border-radius: var(--r-m);
  box-shadow: 0 18px 40px rgba(39, 50, 68, .08);
  overflow: hidden;
}
.yb-ui__bar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px 18px; border-bottom: 1px solid var(--c-line); background: var(--c-surface);
}
.yb-ui__name { font-size: var(--fs-13); font-weight: 700; }
.yb-ui__tag {
  font-size: 11px; font-weight: 700; padding: 2px 10px; border-radius: 999px;
  background: var(--c-tint2); color: var(--c-tint2-text);
}
.yb-ui__tools { display: flex; align-items: center; gap: 8px; padding: 12px 18px; }
.yb-ui__search { flex: 1; height: 28px; border-radius: 6px; border: 1px solid var(--c-line-strong); background: var(--c-bg); }
.yb-ui__chip { font-size: 11px; font-weight: 700; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--c-line-strong); color: var(--c-sub); }
.yb-ui__chip.is-on { background: var(--c-accent); border-color: var(--c-accent); color: #fff; }
.yb-ui__head, .yb-ui__row {
  display: grid; grid-template-columns: 36px 1.4fr 1.2fr .8fr; gap: 14px; align-items: center;
  padding: 0 18px;
}
.yb-ui__head { height: 32px; font-size: 11px; color: var(--c-sub); background: var(--c-surface); border-top: 1px solid var(--c-line); border-bottom: 1px solid var(--c-line); }
.yb-ui__row { height: 44px; border-bottom: 1px solid var(--c-line); }
.yb-ui__row:last-child { border-bottom: 0; }
.yb-ui__row b { display: block; height: 8px; border-radius: 4px; background: var(--c-tint-strong); }
.yb-ui__st { display: block; width: 10px; height: 10px; border-radius: 50%; background: var(--c-accent); margin-left: 4px; }
.yb-ui__st--wait { background: var(--c-line-strong); }
.yb-ui--mini {
  position: absolute; right: -4px; bottom: 0;
  padding: 12px 18px; display: flex; flex-direction: column; gap: 2px; border-radius: 12px;
}
.yb-ui__mini-label { font-size: 11px; color: var(--c-sub); font-weight: 700; }
.yb-ui__mini-num { font-family: var(--f-en); font-weight: 800; font-size: 26px; line-height: 1; color: var(--c-accent); font-feature-settings: "tnum"; }
.yb-ui__mini-num small { font-size: 14px; margin-left: 2px; }
.yb-ui__mini-note { font-size: 10px; color: var(--c-sub); margin-top: 4px; }
@media (min-width: 960px) {
  .yb-hero__visual { padding-bottom: 100px; }
  .yb-ui--mini { right: -28px; bottom: 0; padding: 16px 22px; }
  .yb-ui__mini-num { font-size: 32px; }
}
.yb-ui--card { box-shadow: none; }
.yb-ui__fields { padding: 6px 18px 10px; }
.yb-ui__fields > div { display: grid; grid-template-columns: 72px 1fr; align-items: center; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--c-line); }
.yb-ui__fields > div:last-child { border-bottom: 0; }
.yb-ui__fields dt { font-size: 11px; color: var(--c-sub); font-weight: 700; }
.yb-ui__fields dd b { display: block; height: 8px; border-radius: 4px; background: var(--c-tint-strong); }
.yb-ui__fields dd b + b { margin-top: 6px; }

/* ---------- bento ---------- */
.yb-bento { display: grid; gap: 16px; }
.yb-bento > article { border-radius: var(--r-l); padding: 28px 24px; }
.yb-bento__main { background: var(--c-tint); display: grid; gap: 28px; }
.yb-bento__num { background: var(--c-tint2); }
.yb-bento__sub { background: var(--c-bg); border: 1.5px solid var(--c-line); }
.yb-bento__kicker { font-size: var(--fs-13); font-weight: 700; color: var(--c-sub); letter-spacing: 0.04em; margin-bottom: 10px; }
.yb-bento__kicker--no { font-family: var(--f-en); font-size: var(--fs-14); color: var(--c-accent); letter-spacing: 0.1em; }
.yb-bento__title { font-family: var(--f-en); font-weight: 800; font-size: var(--fs-32); line-height: 1.1; letter-spacing: 0.02em; margin-bottom: 14px; }
.yb-bento__title span { font-family: var(--f-ja); font-size: var(--fs-13); font-weight: 500; color: var(--c-sub); margin-left: 12px; letter-spacing: 0.1em; }
.yb-bento__text p + p, .yb-bento__sub p + p { margin-top: 8px; }
.yb-bento__text .yb-link, .yb-bento__sub .yb-link { margin-top: 18px; }
.yb-bento__sub p { color: var(--c-text); font-size: var(--fs-15); }
.yb-bento__note { font-size: var(--fs-13); color: var(--c-sub); margin-top: 6px; }
.yb-num {
  font-family: var(--f-en); font-weight: 800; font-size: 56px; line-height: 1; letter-spacing: -0.01em;
  color: var(--c-tint2-text); font-feature-settings: "tnum";
}
.yb-num small { font-size: 28px; margin-left: 2px; vertical-align: top; }
@media (min-width: 768px) {
  .yb-bento { grid-template-columns: repeat(3, 1fr); grid-template-rows: auto auto; }
  .yb-bento > article { padding: 36px; }
  .yb-bento__main { grid-column: 1 / 3; grid-row: 1 / 3; grid-template-columns: 1fr 1fr; align-items: center; gap: 36px; }
  .yb-bento__num { grid-column: 3; }
  .yb-bento__sub { grid-column: 3; }
  .yb-num { font-size: 64px; }
}

/* ---------- split (sticky head + content) ---------- */
.yb-split { display: grid; gap: 28px; }
.yb-split__lead { color: var(--c-sub); margin: 12px 0 22px; font-size: var(--fs-15); }
@media (min-width: 960px) {
  .yb-split { grid-template-columns: 320px 1fr; gap: 64px; align-items: start; }
  .yb-split__head { position: sticky; top: calc(var(--head-h) + 32px); }
}

/* ---------- steps (principles) ---------- */
.yb-steps { background: var(--c-bg); border-radius: var(--r-l); border: 1.5px solid var(--c-tint-strong); overflow: hidden; }
.yb-steps li { display: grid; grid-template-columns: 56px 1fr; gap: 12px; padding: 24px 22px; border-bottom: 1px solid var(--c-line); }
.yb-steps li:last-child { border-bottom: 0; }
.yb-steps__no { font-family: var(--f-en); font-weight: 800; font-size: var(--fs-24); line-height: 1.2; color: var(--c-accent); font-feature-settings: "tnum"; }
.yb-steps h3 { font-size: var(--fs-18); font-weight: 700; line-height: 1.4; margin-bottom: 6px; }
.yb-steps p { font-size: var(--fs-15); color: var(--c-sub); }
@media (min-width: 768px) {
  .yb-steps li { grid-template-columns: 80px 1fr; padding: 30px 32px; }
  .yb-steps__no { font-size: var(--fs-28); }
}

/* ---------- news list ---------- */
.yb-news li + li { margin-top: 10px; }
.yb-news__item {
  display: grid; grid-template-columns: auto 1fr; grid-template-areas: "date cat" "title title";
  gap: 6px 12px; align-items: center; justify-content: start;
  padding: 18px 20px; border: 1.5px solid var(--c-line); border-radius: var(--r-m); background: var(--c-bg);
}
.yb-news__item:hover { border-color: var(--c-accent); }
.yb-news__date { grid-area: date; font-family: var(--f-en); font-weight: 600; font-size: var(--fs-14); color: var(--c-sub); font-feature-settings: "tnum"; }
.yb-news__cat { grid-area: cat; justify-self: start; font-size: var(--fs-12); font-weight: 700; padding: 1px 10px; border-radius: 999px; background: var(--c-tint); color: var(--c-accent); }
.yb-news__title { grid-area: title; font-weight: 500; }
.yb-news-empty { color: var(--c-sub); }
.yb-pagination { margin-top: 32px; }
.yb-pagination .nav-links { display: flex; gap: 8px; flex-wrap: wrap; }
.yb-pagination .page-numbers { display: inline-flex; min-width: 40px; height: 40px; padding: 0 12px; align-items: center; justify-content: center; border: 1.5px solid var(--c-line); border-radius: var(--r-s); font-size: var(--fs-14); }
.yb-pagination .page-numbers.current { background: var(--c-accent); border-color: var(--c-accent); color: #fff; }
@media (min-width: 768px) {
  .yb-news__item { grid-template-columns: 96px auto 1fr; grid-template-areas: "date cat title"; gap: 18px; padding: 22px 28px; }
}

/* ---------- facts (company on top) ---------- */
.yb-facts { background: var(--c-bg); border-radius: var(--r-l); padding: 28px 24px; }
.yb-facts__name { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 14px; padding-bottom: 20px; border-bottom: 1.5px solid var(--c-line); }
.yb-facts__name strong { font-size: var(--fs-24); font-weight: 700; }
.yb-facts__name span { font-family: var(--f-en); font-weight: 600; color: var(--c-sub); font-size: var(--fs-14); letter-spacing: 0.04em; }
.yb-facts__grid { display: grid; }
.yb-facts__grid > div { padding: 16px 0; border-bottom: 1px solid var(--c-line); }
.yb-facts__grid dt { font-size: var(--fs-13); font-weight: 700; color: var(--c-sub); margin-bottom: 2px; }
.yb-facts__grid dd { font-size: var(--fs-15); }
.yb-facts__more { margin-top: 20px; }
@media (min-width: 768px) {
  .yb-facts { padding: 40px 44px; }
  .yb-facts__grid { grid-template-columns: 1fr 1fr; column-gap: 44px; }
  .yb-facts__grid > div { padding: 20px 0; }
}

/* ---------- cta ---------- */
.yb-cta { padding-top: 0; }
.yb-cta__box {
  background: var(--c-tint); border-radius: var(--r-l); padding: 40px 24px; text-align: center;
}
.yb-cta__box > p { color: var(--c-sub); margin: 14px auto 0; max-width: 36em; font-size: var(--fs-15); }
.yb-cta__actions { display: flex; flex-direction: column; gap: 12px; margin-top: 28px; }
.yb-cta__box--inline { margin-top: 40px; text-align: left; padding: 28px 24px; }
.yb-cta__box--inline > p { margin: 0 0 16px; }
@media (min-width: 560px) {
  .yb-cta__actions { flex-direction: row; justify-content: center; }
}
@media (min-width: 768px) {
  .yb-cta__box { padding: 64px 40px; }
  .yb-cta__box--inline { padding: 36px 40px; }
}

/* ---------- sub pages ---------- */
.yb-crumbs { padding-top: 16px; font-size: var(--fs-13); color: var(--c-sub); }
.yb-crumbs ol { display: flex; flex-wrap: wrap; gap: 4px 8px; }
.yb-crumbs li + li::before { content: "/"; margin-right: 8px; color: var(--c-line-strong); }
.yb-crumbs a:hover { color: var(--c-accent); }
.yb-pagehead { padding: 24px 0 8px; }
.yb-pagehead__title { font-size: var(--fs-32); font-weight: 700; line-height: 1.3; }
.yb-pagehead__lead { margin-top: 16px; color: var(--c-sub); max-width: 40em; }
.yb-pagehead--post { padding-top: 24px; }
.yb-pagehead__title--post { font-size: var(--fs-24); }
.yb-post__meta { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
@media (min-width: 768px) {
  .yb-pagehead { padding: 40px 0 16px; }
  .yb-pagehead__title { font-size: var(--fs-40); }
  .yb-pagehead__title--post { font-size: var(--fs-32); }
}

/* vertical stacked table */
.yb-table { border: 1.5px solid var(--c-line); border-radius: var(--r-m); overflow: hidden; }
.yb-table > div { padding: 18px 20px; border-bottom: 1px solid var(--c-line); }
.yb-table > div:last-child { border-bottom: 0; }
.yb-table dt { font-size: var(--fs-13); font-weight: 700; color: var(--c-sub); margin-bottom: 4px; }
.yb-table dd { font-size: var(--fs-15); }
@media (min-width: 768px) {
  .yb-table > div { display: grid; grid-template-columns: 200px 1fr; gap: 24px; padding: 22px 28px; }
  .yb-table dt { padding-top: 2px; margin: 0; font-size: var(--fs-14); }
  .yb-table dd { font-size: var(--fs-16); }
}

/* business page blocks */
.yb-bizblock { display: grid; gap: 28px; background: var(--c-tint); border-radius: var(--r-l); padding: 28px 24px; }
.yb-bizblock + .yb-bizblock { margin-top: 16px; }
.yb-bizblock--plain { background: var(--c-bg); border: 1.5px solid var(--c-line); }
.yb-bizblock__title { font-size: var(--fs-24); font-weight: 700; line-height: 1.4; margin-bottom: 14px; }
.yb-bizblock__text p { font-size: var(--fs-15); }
.yb-bizblock__text .yb-btn { margin-top: 24px; }
.yb-checks { margin-top: 18px; display: grid; gap: 8px; }
.yb-checks li { position: relative; padding-left: 24px; font-size: var(--fs-15); }
.yb-checks li::before {
  content: ""; position: absolute; left: 2px; top: 9px; width: 10px; height: 6px;
  border-left: 2px solid var(--c-accent); border-bottom: 2px solid var(--c-accent); transform: rotate(-45deg);
}
@media (min-width: 768px) {
  .yb-bizblock { padding: 40px 44px; }
  .yb-bizblock__title { font-size: var(--fs-28); }
}
@media (min-width: 960px) {
  .yb-bizblock { grid-template-columns: 1.1fr 1fr; align-items: center; gap: 48px; }
  .yb-bizblock--plain { grid-template-columns: 1fr; }
}

/* link list (policies) */
.yb-linklist { display: grid; gap: 10px; }
.yb-linklist a {
  display: grid; gap: 4px; padding: 20px 56px 20px 22px; position: relative;
  background: var(--c-bg); border: 1.5px solid var(--c-tint-strong); border-radius: var(--r-m);
}
.yb-linklist a:hover { border-color: var(--c-accent); }
.yb-linklist strong { font-size: var(--fs-16); font-weight: 700; }
.yb-linklist span { font-size: var(--fs-13); color: var(--c-sub); }
.yb-linklist a::after {
  content: ""; position: absolute; right: 24px; top: 50%; width: 8px; height: 8px; margin-top: -5px;
  border-top: 2px solid var(--c-accent); border-right: 2px solid var(--c-accent); transform: rotate(45deg);
}

/* doc layout (policies) */
.yb-doc { display: grid; gap: 32px; }
.yb-doc__side ul { display: flex; flex-wrap: wrap; gap: 8px; }
.yb-doc__side a { display: inline-block; padding: 8px 14px; border-radius: 999px; border: 1.5px solid var(--c-line); font-size: var(--fs-14); }
.yb-doc__side a[aria-current="page"] { background: var(--c-accent); border-color: var(--c-accent); color: #fff; font-weight: 700; }
.yb-doc__side a:hover:not([aria-current="page"]) { border-color: var(--c-accent); color: var(--c-accent); }
@media (min-width: 960px) {
  .yb-doc { grid-template-columns: 260px 1fr; gap: 64px; align-items: start; }
  .yb-doc__side { position: sticky; top: calc(var(--head-h) + 32px); }
  .yb-doc__side ul { flex-direction: column; gap: 6px; }
  .yb-doc__side a { display: block; border: 0; border-radius: var(--r-s); padding: 10px 14px; }
  .yb-doc__side a:hover:not([aria-current="page"]) { background: var(--c-surface); color: var(--c-text); }
}

/* prose */
.yb-prose { max-width: 42em; }
.yb-prose p + p, .yb-prose ul + p, .yb-prose p + ul { margin-top: 1em; }
.yb-prose h2 { font-size: var(--fs-18); font-weight: 700; margin: 2.2em 0 .6em; padding-left: 14px; border-left: 3px solid var(--c-accent); line-height: 1.5; }
.yb-prose h3 { font-size: var(--fs-16); font-weight: 700; margin: 1.6em 0 .5em; }
.yb-prose ul { list-style: disc; padding-left: 1.4em; }
.yb-prose ul li + li { margin-top: .3em; }
.yb-prose a:not(.yb-link), .yb-table dd a:not(.yb-link) { color: var(--c-accent); text-decoration: underline; text-underline-offset: 4px; }
.yb-prose__meta { margin-top: 2.5em; font-size: var(--fs-14); color: var(--c-sub); }
.yb-prose__links { display: flex; flex-wrap: wrap; gap: 10px 28px; margin-top: 1.4em; }
.yb-prose img { border-radius: var(--r-s); }

/* 404 */
.yb-notfound { padding: 80px 0 100px; text-align: center; }
.yb-notfound__code { font-family: var(--f-en); font-weight: 800; font-size: 72px; line-height: 1; color: var(--c-tint-strong); }
.yb-notfound__title { font-size: var(--fs-24); font-weight: 700; margin-top: 12px; }
.yb-notfound__text { color: var(--c-sub); margin: 12px 0 28px; }

/* ---------- footer ---------- */
.yb-footer { border-top: 1px solid var(--c-line); padding: 48px 0 32px; background: var(--c-surface); }
.yb-footer__grid { display: grid; gap: 20px; }
.yb-footer__brand p { margin-top: 14px; font-size: var(--fs-13); color: var(--c-sub); line-height: 1.8; }
.yb-footer__nav ul { display: flex; flex-wrap: wrap; gap: 0 20px; }
.yb-footer__nav a, .yb-footer__sub a { display: inline-block; padding: 12px 0; }
.yb-footer__nav a { font-size: var(--fs-14); font-weight: 700; }
.yb-footer__nav a:hover, .yb-footer__sub a:hover { color: var(--c-accent); }
.yb-footer__sub ul { display: flex; flex-wrap: wrap; gap: 0 20px; }
.yb-footer__sub a { font-size: var(--fs-13); color: var(--c-sub); }
.yb-footer__ext { display: grid; gap: 10px; }
.yb-footer__ext a {
  display: grid; gap: 2px; padding: 14px 18px; background: var(--c-bg);
  border: 1.5px solid var(--c-line); border-radius: var(--r-m);
}
.yb-footer__ext a:hover { border-color: var(--c-accent); }
.yb-footer__ext strong { font-size: var(--fs-14); }
.yb-footer__ext span { font-size: var(--fs-12); color: var(--c-sub); }
.yb-footer__copy { margin-top: 40px; font-family: var(--f-en); font-size: var(--fs-12); color: var(--c-sub); letter-spacing: 0.04em; }
@media (min-width: 960px) {
  .yb-footer { padding: 64px 0 36px; }
  .yb-footer__grid { grid-template-columns: 1.3fr 1fr 1fr 1.3fr; gap: 40px; }
  .yb-footer__nav ul, .yb-footer__sub ul { flex-direction: column; gap: 0; }
  .yb-footer__nav a, .yb-footer__sub a { padding: 6px 0; }
}

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