:root {
  color-scheme: light;
  --ink: #111827;
  --muted: #667085;
  --paper: #f3f0e8;
  --surface: #fffdf8;
  --line: #cfd3dc;
  --blue: #3157f6;
  --blue-dark: #1835a8;
  --orange: #ff6b35;
  --green: #087a50;
  --shell: 1320px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  min-width: 320px;
  margin: 0;
  background:
    linear-gradient(rgba(17, 24, 39, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 24, 39, .045) 1px, transparent 1px),
    var(--paper);
  background-size: 32px 32px;
  color: var(--ink);
  font-family: Inter, "Noto Sans SC", "PingFang SC", system-ui, sans-serif;
  line-height: 1.65;
}

a { color: inherit; }
.shell { width: min(var(--shell), calc(100% - 56px)); margin-inline: auto; }
.skip-link {
  position: fixed;
  z-index: 999;
  top: 10px;
  left: 10px;
  transform: translateY(-160%);
  padding: 10px 15px;
  border: 2px solid var(--ink);
  background: var(--surface);
  font-weight: 900;
}
.skip-link:focus { transform: none; }

.header {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid rgba(17, 24, 39, .2);
  background: rgba(243, 240, 232, .92);
  backdrop-filter: blur(16px);
}
.nav { display: flex; min-height: 70px; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; }
.brand > span:last-child { display: flex; flex-direction: column; line-height: 1; }
.brand b { font-size: 16px; letter-spacing: -.04em; }
.brand small { margin-top: 6px; color: var(--muted); font: 9px ui-monospace, monospace; letter-spacing: .12em; }
.logo {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  background: var(--ink);
  box-shadow: 3px 3px 0 var(--orange);
  color: white;
  font: 800 12px ui-monospace, monospace;
}
.nav nav { display: flex; gap: 28px; }
.nav nav a { color: var(--muted); font-size: 12px; font-weight: 800; text-decoration: none; }
.nav nav a:hover { color: var(--blue); }

.breadcrumbs {
  display: flex;
  width: min(var(--shell), calc(100% - 56px));
  margin: 22px auto 0;
  gap: 9px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}
.breadcrumbs a { color: var(--blue-dark); text-decoration: none; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(360px, .65fr);
  gap: clamp(50px, 7vw, 100px);
  align-items: center;
  padding-block: 68px 78px;
}
.kicker,
.section-heading > p,
.section-heading > div > p,
.topic-nav > div > p,
.topic-guide > div > p {
  margin: 0 0 14px;
  color: var(--blue-dark);
  font: 700 10px ui-monospace, monospace;
  letter-spacing: .12em;
  text-transform: uppercase;
}
h1 {
  margin: 0;
  font-size: clamp(54px, 7vw, 94px);
  font-weight: 950;
  letter-spacing: -.078em;
  line-height: .98;
}
h1 em { color: var(--blue); font-style: normal; }
.lead { max-width: 760px; margin: 26px 0 0; color: var(--muted); font-size: clamp(16px, 1.6vw, 21px); }
.primary-link,
.detail-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  background: var(--ink);
  color: white;
  font-weight: 850;
  text-decoration: none;
}
.primary-link { min-width: 196px; margin-top: 30px; padding: 13px 17px; }
.primary-link:hover,
.detail-link:hover { background: var(--blue); }

.snapshot {
  position: relative;
  border: 1px solid var(--ink);
  padding: 0 24px 24px;
  background: var(--surface);
  box-shadow: 13px 13px 0 var(--blue);
}
.snapshot::before {
  position: absolute;
  top: -14px;
  right: 24px;
  width: 62px;
  height: 26px;
  background: rgba(255, 107, 53, .88);
  content: "";
  transform: rotate(3deg);
}
.snapshot > p {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin: 0 -24px 24px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  font: 10px ui-monospace, monospace;
  letter-spacing: .07em;
}
.snapshot > p b { color: var(--green); font-weight: 600; }
.snapshot > strong { display: block; font: 700 clamp(58px, 7vw, 86px) ui-monospace, monospace; letter-spacing: -.08em; line-height: 1; }
.snapshot > span { color: var(--muted); font-size: 13px; }
.snapshot dl { display: grid; grid-template-columns: repeat(3, 1fr); margin: 30px 0 0; border-top: 1px solid var(--line); }
.snapshot dl div { min-width: 0; padding: 14px 10px 0 0; }
.snapshot dt { color: var(--muted); font-size: 10px; }
.snapshot dd { margin: 4px 0 0; overflow-wrap: anywhere; font: 700 13px ui-monospace, monospace; }

.signals { border-block: 1px solid var(--ink); background: var(--ink); color: white; }
.signals .shell { display: grid; grid-template-columns: repeat(4, 1fr); }
.signals p { display: flex; min-height: 72px; align-items: center; gap: 14px; margin: 0; padding: 0 20px; border-right: 1px solid rgba(255, 255, 255, .16); font-size: 13px; }
.signals p:first-child { border-left: 1px solid rgba(255, 255, 255, .16); }
.signals b { color: #91a4ff; font: 10px ui-monospace, monospace; }

.topic-nav {
  display: grid;
  grid-template-columns: minmax(230px, .42fr) minmax(0, 1.58fr);
  gap: 34px;
  align-items: center;
  padding-block: 34px;
  border-bottom: 1px solid var(--line);
}
.topic-nav > div > p { margin-bottom: 7px; }
.topic-nav h2 { margin: 0; font-size: 23px; letter-spacing: -.035em; }
.topic-nav nav { display: flex; flex-wrap: wrap; gap: 7px; }
.topic-nav a,
.topic-nav span {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  border: 1px solid var(--line);
  padding: 6px 10px;
  background: var(--surface);
  font-size: 11px;
  font-weight: 800;
  text-decoration: none;
}
.topic-nav a:hover { border-color: var(--blue); color: var(--blue); }
.topic-nav span[aria-current="page"] { border-color: var(--ink); background: var(--ink); color: white; }
.topic-evidence { display: grid; grid-template-columns: .72fr 1.28fr; gap: 38px; border-block: 1px solid var(--ink); padding-block: 34px; }
.topic-evidence > div > p { margin: 0 0 8px; color: var(--blue); font: 800 10px ui-monospace, monospace; letter-spacing: .1em; }
.topic-evidence h2 { margin: 0; font-size: 27px; letter-spacing: -.04em; }
.topic-evidence > div > span { display: block; max-width: 470px; margin-top: 13px; color: var(--muted); font-size: 12px; }
.topic-evidence dl { display: grid; margin: 0; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.topic-evidence dl div { min-width: 0; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 16px; background: var(--surface); }
.topic-evidence dt { color: var(--muted); font-size: 10px; }
.topic-evidence dd { margin: 5px 0 2px; overflow-wrap: anywhere; font-size: 18px; font-weight: 900; }
.topic-evidence small { color: var(--muted); font-size: 9px; }

.ranking { scroll-margin-top: 90px; padding-block: 88px 100px; }
.section-heading { margin-bottom: 28px; }
.section-heading--split { display: flex; align-items: flex-end; justify-content: space-between; gap: 32px; }
.section-heading h2 {
  margin: 0;
  font-size: clamp(36px, 5vw, 62px);
  font-weight: 950;
  letter-spacing: -.064em;
  line-height: 1.05;
}
.section-heading--split > p { margin: 0 0 5px; color: var(--muted); font: 700 11px ui-monospace, monospace; }
.station-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.station-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  border: 1px solid var(--line);
  padding: 23px;
  background: var(--surface);
  box-shadow: 5px 5px 0 rgba(17, 24, 39, .08);
}
.station-card:hover { border-color: var(--ink); box-shadow: 6px 6px 0 rgba(49, 87, 246, .22); }
.station-card__head { display: flex; align-items: center; gap: 16px; }
.rank-badge {
  display: flex;
  width: 56px;
  height: 56px;
  flex: 0 0 auto;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: white;
  font: 800 20px ui-monospace, monospace;
  line-height: 1.05;
}
.rank-badge small { color: #aeb7cc; font-size: 8px; letter-spacing: .08em; }
.station-card:nth-child(1) .rank-badge { box-shadow: 4px 4px 0 var(--orange); }
.station-title { min-width: 0; }
.station-title h2 { margin: 0; overflow-wrap: anywhere; font-size: 22px; letter-spacing: -.035em; line-height: 1.2; }
.station-title h2 a { text-decoration: none; }
.station-title h2 a:hover { color: var(--blue); }
.station-title p { margin: 5px 0 0; color: var(--muted); font-size: 11px; }
.site-summary { margin: 20px 0 0; color: #3f4858; font-size: 14px; }
.site-intro { margin-top: 12px; border-block: 1px dashed var(--line); }
.site-intro summary { padding: 10px 0; color: var(--blue-dark); cursor: pointer; font-size: 12px; font-weight: 850; }
.site-intro p { max-height: 260px; overflow: auto; margin: 0; padding: 0 8px 13px 0; color: var(--muted); font-size: 13px; }
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin: 20px 0 0; border: 1px solid var(--line); background: #f7f5ee; }
.metric-grid div { min-width: 0; padding: 10px; border-right: 1px solid var(--line); }
.metric-grid div:last-child { border-right: 0; }
.metric-grid dt { color: var(--muted); font-size: 9px; }
.metric-grid dd { margin: 4px 0 0; overflow-wrap: anywhere; font-size: 12px; font-weight: 850; }
.station-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 18px; }
.station-meta h3 { margin: 0 0 7px; color: var(--muted); font-size: 10px; letter-spacing: .05em; }
.tag-list { display: flex; flex-wrap: wrap; gap: 5px; }
.tag { padding: 3px 7px; border: 1px solid var(--line); background: var(--paper); font-size: 10px; font-weight: 750; }
.tag--muted { color: var(--muted); }
.tag--more { border-style: dashed; color: var(--blue-dark); }
.station-card__foot { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: auto; padding-top: 22px; }
.station-card__foot p { display: flex; flex-wrap: wrap; gap: 10px; margin: 0; color: var(--muted); font-size: 11px; }
.detail-link { flex: 0 0 auto; padding: 9px 12px; font-size: 11px; }

.pagination { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin-top: 48px; }
.page-numbers { display: flex; align-items: center; justify-content: center; gap: 7px; }
.page-number,
.page-step {
  display: inline-flex;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  background: var(--surface);
  font-weight: 850;
  text-decoration: none;
}
.page-step { padding-inline: 16px; }
.page-number:hover,
.page-step:hover { border-color: var(--blue); color: var(--blue); }
.page-number.is-current { border-color: var(--ink); background: var(--ink); color: white; }
.page-step.is-disabled { color: #9aa1ad; }
.page-gap { padding-inline: 3px; color: var(--muted); }

.topic-guide {
  display: grid;
  grid-template-columns: .58fr 1.42fr;
  gap: 36px;
  padding-block: 78px;
}
.topic-guide > div > p { margin-bottom: 10px; }
.topic-guide > div > h2 { margin: 0; font-size: clamp(34px, 4vw, 52px); letter-spacing: -.055em; line-height: 1.08; }
.topic-guide > p { margin: 0; color: var(--muted); font-size: 15px; }
.topic-checks { display: grid; grid-column: 1 / -1; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--ink); border-left: 1px solid var(--ink); }
.topic-checks article { min-height: 190px; border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink); padding: 20px; background: var(--surface); }
.topic-checks b { color: var(--blue); font: 800 10px ui-monospace, monospace; }
.topic-checks h3 { margin: 30px 0 9px; font-size: 17px; line-height: 1.4; }
.topic-checks p { margin: 0; color: var(--muted); font-size: 12px; }
.topic-more { display: flex; align-items: center; justify-content: space-between; gap: 28px; margin-top: 36px; border: 1px solid var(--line); padding: 22px; background: var(--surface); }
.topic-more p { max-width: 720px; margin: 0; color: var(--muted); font-size: 13px; }
.topic-more .primary-link { flex: 0 0 auto; margin-top: 0; }
.topic-faq { border-top: 1px solid var(--ink); }

.method { border-block: 1px solid var(--ink); padding-block: 82px 90px; background: var(--surface); }
.guide-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(230px, .5fr);
  gap: 34px;
  align-items: center;
  margin-bottom: 28px;
  border: 1px solid var(--line);
  border-left: 6px solid var(--orange);
  padding: 24px;
  background: var(--paper);
}
.guide-intro p { margin: 0; color: #3f4858; font-size: 15px; }
.guide-intro strong { color: var(--blue-dark); font-size: 18px; line-height: 1.45; }
.method-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--ink); border-left: 1px solid var(--ink); }
.method-grid article { min-height: 330px; padding: 22px; border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.method-grid b { color: var(--blue); font: 800 10px ui-monospace, monospace; }
.method-grid h3 { margin: 36px 0 10px; font-size: 20px; line-height: 1.35; }
.method-grid p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.78; }
.cost-guide {
  display: grid;
  grid-template-columns: .62fr 1.38fr;
  gap: 34px;
  margin-top: 34px;
  border: 1px solid var(--ink);
  padding: 26px;
  background: var(--ink);
  color: white;
}
.cost-guide > div > p,
.acceptance > div > p,
.red-flags > div > p {
  margin: 0 0 8px;
  color: #91a4ff;
  font: 800 10px ui-monospace, monospace;
  letter-spacing: .1em;
}
.cost-guide h3,
.acceptance h3,
.red-flags h3 { margin: 0; font-size: 25px; letter-spacing: -.035em; }
.cost-formula code {
  display: block;
  overflow-wrap: anywhere;
  border-left: 4px solid var(--orange);
  padding: 12px 15px;
  background: rgba(255, 255, 255, .08);
  color: white;
  font: 700 13px/1.7 ui-monospace, monospace;
}
.cost-formula p { margin: 14px 0 0; color: #bec6d6; font-size: 13px; }
.decision-table { margin-top: 24px; border-top: 1px solid var(--ink); border-left: 1px solid var(--ink); }
.decision-row { display: grid; grid-template-columns: .5fr 1fr 1fr; }
.decision-row > * { margin: 0; border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink); padding: 14px 16px; font-size: 13px; }
.decision-row b { background: var(--paper); color: var(--blue-dark); }
.decision-row span { color: #465061; }
.decision-row--head > * { background: var(--blue); color: white; font-size: 11px; letter-spacing: .04em; }
.acceptance {
  display: grid;
  grid-template-columns: minmax(240px, .58fr) minmax(0, 1.42fr);
  gap: 42px;
  margin-top: 34px;
  border-block: 1px solid var(--ink);
  padding-block: 32px;
}
.acceptance > div > p:last-child { margin: 14px 0 0; color: var(--muted); font: inherit; font-size: 13px; letter-spacing: 0; }
.acceptance ol { display: grid; grid-template-columns: 1fr 1fr; gap: 0; margin: 0; padding: 0; list-style: none; counter-reset: acceptance; }
.acceptance li { position: relative; min-height: 128px; border-top: 1px solid var(--line); padding: 18px 18px 18px 54px; counter-increment: acceptance; }
.acceptance li:nth-child(odd) { border-right: 1px solid var(--line); }
.acceptance li::before { position: absolute; top: 19px; left: 8px; color: var(--orange); content: "0" counter(acceptance); font: 800 13px ui-monospace, monospace; }
.acceptance li b { display: block; margin-bottom: 6px; font-size: 14px; }
.acceptance li span { color: var(--muted); font-size: 12px; line-height: 1.7; }
.red-flags {
  display: grid;
  grid-template-columns: minmax(240px, .58fr) minmax(0, 1.42fr);
  gap: 42px;
  margin-top: 28px;
  border: 1px solid #b83f39;
  padding: 26px;
  background: #b83f390c;
}
.red-flags > div > p { color: #b83f39; }
.red-flags ul { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 30px; margin: 0; padding-left: 20px; color: #5e3c39; font-size: 13px; }
.red-flags li { padding-left: 3px; }
.data-note { margin: 18px 0 0; color: var(--muted); font-size: 11px; }
.faq { scroll-margin-top: 90px; padding-block: 82px 96px; }
.faq-lead { max-width: 900px; margin: -8px 0 30px; color: var(--muted); font-size: 14px; }
.faq-list { max-width: 1000px; border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { position: relative; padding: 20px 44px 20px 0; cursor: pointer; font-size: 16px; font-weight: 850; list-style: none; }
.faq-list summary::after { position: absolute; right: 5px; color: var(--blue); content: "+"; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list p { max-width: 900px; margin: 0; padding: 0 44px 24px 0; color: var(--muted); font-size: 14px; line-height: 1.85; }
.page-continue { margin-block: 82px; border: 1px solid var(--ink); padding: 46px; background: var(--surface); box-shadow: 10px 10px 0 var(--blue); }
.page-continue > p { margin: 0 0 8px; color: var(--blue-dark); font: 800 10px ui-monospace, monospace; text-transform: uppercase; }
.page-continue h2 { max-width: 780px; margin: 0; font-size: clamp(32px, 5vw, 56px); letter-spacing: -.055em; line-height: 1.08; }

footer { border-top: 1px solid var(--ink); background: var(--ink); color: white; }
footer .shell { display: grid; min-height: 170px; grid-template-columns: 1fr 1fr 1fr; align-items: center; gap: 24px; }
footer .brand small,
footer p { color: #aeb7cc; }
footer p { margin: 0; font-size: 11px; text-align: center; }
footer > .shell > a:last-child { color: #c8d0e1; font-size: 11px; font-weight: 800; text-align: right; text-decoration: none; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 3px; }

@media (max-width: 1050px) {
  .hero { grid-template-columns: 1fr; }
  .snapshot { max-width: 650px; }
  .station-list { grid-template-columns: 1fr; }
  .topic-checks { grid-template-columns: repeat(2, 1fr); }
  .method-grid { grid-template-columns: repeat(2, 1fr); }
  .method-grid article { min-height: 280px; }
  .acceptance,
  .red-flags { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 700px) {
  .shell,
  .breadcrumbs { width: min(100% - 24px, var(--shell)); }
  .nav { min-height: 62px; }
  .nav nav { display: none; }
  .breadcrumbs { margin-top: 16px; }
  .hero { gap: 38px; padding-block: 44px 58px; }
  h1 { font-size: clamp(45px, 14vw, 64px); }
  .lead { font-size: 15px; }
  .snapshot { margin-right: 9px; padding-inline: 18px; box-shadow: 9px 9px 0 var(--blue); }
  .snapshot > p { margin-inline: -18px; }
  .snapshot dl { grid-template-columns: 1fr 1fr; }
  .snapshot dl div:last-child { grid-column: 1 / -1; }
  .signals .shell { grid-template-columns: repeat(2, 1fr); }
  .signals p { min-height: 64px; padding-inline: 11px; font-size: 11px; }
  .signals p:nth-child(2) { border-right: 0; }
  .signals p:nth-child(-n + 2) { border-bottom: 1px solid rgba(255, 255, 255, .16); }
  .ranking { padding-block: 62px 72px; }
  .section-heading--split { align-items: flex-start; flex-direction: column; gap: 10px; }
  .topic-nav,
  .topic-guide,
  .topic-evidence { grid-template-columns: 1fr; gap: 18px; }
  .topic-nav { padding-block: 26px; }
  .topic-evidence dl { grid-template-columns: 1fr 1fr; }
  .topic-guide { padding-block: 58px; }
  .topic-checks { grid-template-columns: 1fr; }
  .topic-more { align-items: stretch; flex-direction: column; }
  .topic-more .primary-link { width: 100%; }
  .station-card { padding: 18px; }
  .metric-grid { grid-template-columns: 1fr 1fr; }
  .metric-grid div { border-bottom: 1px solid var(--line); }
  .metric-grid div:nth-child(2) { border-right: 0; }
  .metric-grid div:nth-child(3),
  .metric-grid div:nth-child(4) { border-bottom: 0; }
  .station-meta { grid-template-columns: 1fr; }
  .station-card__foot { align-items: stretch; flex-direction: column; }
  .detail-link { min-height: 44px; }
  .pagination { align-items: stretch; flex-wrap: wrap; }
  .page-numbers { width: 100%; order: -1; }
  .page-step { flex: 1; }
  .method { padding-block: 62px; }
  .guide-intro,
  .cost-guide { grid-template-columns: 1fr; gap: 16px; padding: 19px; }
  .method-grid { grid-template-columns: 1fr; }
  .method-grid article { min-height: 0; }
  .decision-table { overflow-x: auto; }
  .decision-row { min-width: 680px; }
  .acceptance ol,
  .red-flags ul { grid-template-columns: 1fr; }
  .acceptance li:nth-child(odd) { border-right: 0; }
  .red-flags { padding: 20px; }
  .faq { padding-block: 62px; }
  .page-continue { margin-right: 9px; padding: 30px 22px; box-shadow: 8px 8px 0 var(--blue); }
  footer .shell { grid-template-columns: 1fr; padding-block: 40px; text-align: center; }
  footer .brand { justify-self: center; }
  footer > .shell > a:last-child { text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}