:root {
  --paper: #f6f8fc;
  --surface: #ffffff;
  --ink: #142036;
  --muted: #56647a;
  --blue: #245cc8;
  --blue-dark: #174493;
  --blue-soft: #eaf1ff;
  --amber: #b76608;
  --amber-soft: #fff1d6;
  --line: #dbe2ed;
  --line-strong: #bac6d8;
  --night: #132442;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 28px;
  --shadow: 0 24px 70px rgba(20, 32, 54, 0.1);
  --shell: min(1180px, calc(100% - 40px));
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
* {
  scrollbar-color: #9aa9bf var(--paper);
  scrollbar-width: thin;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

*::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

*::-webkit-scrollbar-track {
  background: var(--paper);
}

*::-webkit-scrollbar-thumb {
  border: 3px solid var(--paper);
  border-radius: 999px;
  background: #9aa9bf;
}

*::-webkit-scrollbar-thumb:hover {
  background: #74859e;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
summary:focus-visible {
  outline: 3px solid #f2a73c;
  outline-offset: 4px;
  border-radius: 4px;
}

p,
h1,
h2,
h3 {
  margin-top: 0;
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  color: #fff;
  background: var(--night);
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.independence-note {
  color: #35445b;
  background: #edf2f9;
  border-bottom: 1px solid var(--line);
  font-size: 12px;
}

.independence-note .shell {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  text-align: center;
}

.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 4px rgba(183, 102, 8, 0.12);
}

.site-header {
  position: sticky;
  z-index: 30;
  top: 0;
  border-bottom: 1px solid rgba(186, 198, 216, 0.75);
  background: rgba(246, 248, 252, 0.92);
  backdrop-filter: blur(16px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  display: block;
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
}

.brand-copy {
  display: grid;
  line-height: 1.2;
}

.brand-copy strong {
  letter-spacing: 0.02em;
}

.brand-copy small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 11px;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.desktop-nav a {
  padding: 10px 13px;
  border-radius: 7px;
  color: #39485e;
  font-size: 14px;
  font-weight: 650;
  transition: color 140ms ease, background 140ms ease;
}

.desktop-nav a:hover {
  color: var(--blue-dark);
  background: var(--blue-soft);
}

.mobile-nav {
  display: none;
  position: relative;
}

.mobile-nav summary {
  display: grid;
  gap: 4px;
  width: 44px;
  height: 44px;
  place-content: center;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: #fff;
  cursor: pointer;
  list-style: none;
}

.mobile-nav summary::-webkit-details-marker { display: none; }
.mobile-nav summary span { display: block; width: 18px; height: 2px; background: var(--ink); }

.mobile-nav nav {
  position: absolute;
  top: 52px;
  right: 0;
  display: grid;
  width: min(280px, calc(100vw - 40px));
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  box-shadow: var(--shadow);
}

.mobile-nav nav a {
  padding: 11px 12px;
  border-radius: 7px;
  font-weight: 650;
}

.mobile-nav nav a:hover { background: var(--blue-soft); }

.hero {
  position: relative;
  overflow: hidden;
  padding: 92px 0 76px;
  background:
    linear-gradient(rgba(36, 92, 200, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(36, 92, 200, 0.045) 1px, transparent 1px),
    var(--paper);
  background-size: 44px 44px;
}

.hero::after {
  position: absolute;
  right: -160px;
  bottom: -260px;
  width: 520px;
  height: 520px;
  border: 100px solid rgba(36, 92, 200, 0.05);
  border-radius: 50%;
  content: "";
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(390px, 0.72fr);
  gap: 80px;
  align-items: center;
}

.eyebrow {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.eyebrow span {
  padding: 5px 9px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: #44536a;
  background: rgba(255, 255, 255, 0.7);
  font-family: var(--font-mono);
  font-size: 11px;
}

h1 {
  max-width: 760px;
  margin-bottom: 28px;
  font-size: clamp(46px, 5.5vw, 76px);
  line-height: 1.09;
  letter-spacing: -0.045em;
}

h1 em {
  color: var(--blue);
  font-style: normal;
}

.hero-title-main {
  display: block;
  white-space: nowrap;
  font-size: clamp(42px, 4.6vw, 66px);
}

.hero #hero-title em {
  display: block;
  margin-top: 10px;
  white-space: nowrap;
  font-size: clamp(24px, 2.7vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.hero-lede {
  max-width: 720px;
  margin-bottom: 34px;
  color: #44536a;
  font-size: clamp(18px, 2vw, 21px);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 9px;
  font-weight: 750;
  transition: transform 140ms ease, color 140ms ease, background 140ms ease, border-color 140ms ease;
}

.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--blue); box-shadow: 0 10px 24px rgba(36, 92, 200, 0.22); }
.button-primary:hover { background: var(--blue-dark); }
.button-primary span, .button-light span { margin-left: 14px; }
.button-secondary { border-color: var(--line-strong); background: rgba(255, 255, 255, 0.82); }
.button-secondary:hover { border-color: var(--blue); color: var(--blue-dark); }

.hero-fineprint {
  margin: 20px 0 0;
  color: #6a778b;
  font-size: 13px;
}

.decision-board {
  position: relative;
  padding: 28px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow);
}

.board-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.board-head h2 {
  margin: 5px 0 0;
  font-size: 20px;
}

.board-index,
.comparison-row small,
.alternative-card small,
.card-code {
  color: #66748a;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.board-index { white-space: nowrap; }

.decision-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.decision-list li + li { border-top: 1px solid var(--line); }

.decision-list a {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 15px 4px;
  transition: color 140ms ease, padding 140ms ease;
}

.decision-list a:hover {
  padding-left: 10px;
  color: var(--blue-dark);
}

.decision-list a > span {
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 11px;
}

.decision-list strong { font-size: 15px; }
.decision-list small { color: #758195; font-size: 12px; }

.trust-strip {
  border-block: 1px solid var(--line);
  background: #fff;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.trust-grid p {
  display: grid;
  grid-template-columns: 28px 1fr;
  margin: 0;
  padding: 22px 18px;
}

.trust-grid p + p { border-left: 1px solid var(--line); }
.trust-grid strong { font-size: 13px; }
.trust-grid small { grid-column: 2; color: #748196; font-size: 11px; line-height: 1.5; }
.trust-icon { color: var(--blue); font-family: var(--font-mono); font-weight: 800; }

.decision-map-figure {
  margin: 0;
  padding: 56px 0 12px;
  background: #fff;
}

.decision-map-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  background: var(--paper);
}

.decision-map-figure figcaption {
  max-width: 960px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: 104px 0;
  scroll-margin-top: 84px;
}

.section-openai-models {
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.model-name-note {
  margin: -12px 0 32px;
  padding: 18px 20px;
  border-left: 4px solid var(--blue);
  color: #40516a;
  background: var(--blue-soft);
}

.model-tier-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}

.model-tier {
  min-width: 0;
  padding: 30px;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  background: #fff;
}

.model-tier-astra { box-shadow: inset 0 4px 0 var(--blue); }

.model-tier-head,
.specialist-status {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
}

.model-tier-head > span,
.model-kind {
  color: var(--blue-dark);
  font-size: 12px;
  font-weight: 800;
}

.model-tier-head code {
  padding: 3px 7px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: #59677c;
  background: var(--paper);
  font-family: var(--font-mono);
  font-size: 11px;
}

.model-tier h3 {
  margin: 34px 0 10px;
  font-size: clamp(25px, 2.7vw, 34px);
  letter-spacing: -0.035em;
}

.model-role {
  min-height: 60px;
  color: #40516a;
  line-height: 1.7;
}

.model-specs { margin: 26px 0 0; }
.model-specs div { padding: 16px 0; border-top: 1px solid var(--line); }
.model-specs dt { margin-bottom: 4px; color: #778398; font-size: 11px; font-weight: 750; }
.model-specs dd { margin: 0; color: var(--ink); font-size: 14px; line-height: 1.6; }

.specialist-heading {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(360px, 1.2fr);
  gap: 60px;
  align-items: end;
  margin-top: 70px;
}

.specialist-heading h3 { margin: 0; font-size: clamp(28px, 3.3vw, 42px); line-height: 1.2; letter-spacing: -0.03em; }
.specialist-heading p { margin: 0; color: var(--muted); }

.specialist-model-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 30px;
}

.specialist-model {
  padding: 26px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--paper);
}

.specialist-model h3 { margin: 24px 0 10px; font-size: 23px; letter-spacing: -0.025em; }
.specialist-model p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.75; }
.specialist-model-video { border-color: #d4aeb1; background: #fff7f7; }
.specialist-status strong { padding: 3px 8px; border: 1px solid #d4aeb1; border-radius: 999px; color: #7d282e; background: #fff; font-size: 11px; }

.model-source-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 22px;
  align-items: center;
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: #536178;
  font-size: 13px;
}

.model-source-row > span { color: var(--ink); font-weight: 800; }
.model-source-row a { color: var(--blue-dark); text-decoration: underline; text-decoration-color: #a7bce8; text-underline-offset: 4px; }
.model-source-row a:hover { text-decoration-color: var(--blue); }

.section-detail-link {
  margin: 22px 0 0;
  text-align: right;
}

.section-detail-link a {
  color: var(--blue-dark);
  font-size: 14px;
  font-weight: 760;
  text-decoration: underline;
  text-decoration-color: #a7bce8;
  text-underline-offset: 4px;
}

.section-detail-link a:hover { color: var(--blue); text-decoration-color: var(--blue); }

.section-heading { margin-bottom: 46px; }
.section-heading h2, .method-intro h2, .faq-heading h2, .closing-inner h2 {
  margin: 8px 0 0;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.18;
  letter-spacing: -0.035em;
}

.heading-split {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.7fr);
  gap: 60px;
  align-items: end;
}

.heading-split > p,
.centered-heading > p,
.guide-heading > p,
.method-intro > p,
.closing-inner > div > p {
  margin-bottom: 0;
  color: var(--muted);
}

.comparison-ledger {
  border-top: 2px solid var(--ink);
}

.comparison-row {
  display: grid;
  grid-template-columns: minmax(240px, 0.8fr) 1fr 1fr;
  gap: 32px;
  align-items: center;
  min-height: 126px;
  padding: 24px 18px;
  border-bottom: 1px solid var(--line-strong);
  background: transparent;
  transition: background 160ms ease, color 160ms ease;
}

.comparison-row:hover { background: rgba(255, 255, 255, 0.66); }
.comparison-row:hover .pair,
.comparison-row:focus-visible .pair { color: var(--blue-dark); }
.comparison-row p { margin: 4px 0 0; color: #44536a; line-height: 1.55; }
.pair { display: flex; align-items: center; gap: 12px; font-size: clamp(18px, 2vw, 24px); font-weight: 780; }
.pair b { padding: 2px 6px; color: var(--amber); background: var(--amber-soft); font-family: var(--font-mono); font-size: 10px; }

.answer-note {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 24px;
  margin-top: 46px;
  padding: 28px;
  border: 1px solid #b8caec;
  border-left: 5px solid var(--blue);
  border-radius: var(--radius-sm);
  background: var(--blue-soft);
}

.answer-mark {
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  color: #fff;
  border-radius: 50%;
  background: var(--blue);
  font-family: var(--font-mono);
  font-weight: 800;
}

.answer-note p:last-child { margin: 5px 0 0; color: #354963; font-size: 17px; }

.section-domestic {
  background:
    linear-gradient(90deg, rgba(36, 92, 200, 0.045) 1px, transparent 1px),
    linear-gradient(rgba(36, 92, 200, 0.045) 1px, transparent 1px),
    #f2f6fd;
  background-size: 48px 48px;
}

.domestic-answer {
  display: grid;
  grid-template-columns: minmax(210px, 0.42fr) 1fr;
  gap: 34px;
  align-items: center;
  margin-bottom: 34px;
  padding: 22px 26px;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.66);
}

.domestic-answer strong { font-size: 19px; }
.domestic-answer p { margin: 0; color: var(--muted); }

.domestic-product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}

.domestic-product {
  display: flex;
  min-height: 420px;
  flex-direction: column;
  padding: 30px;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.92);
}

.domestic-product-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.domestic-product-head span {
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.domestic-product h3 { margin: 0; text-align: right; font-size: 27px; letter-spacing: -0.025em; }
.domestic-product > p { margin: 22px 0; color: var(--muted); }
.domestic-product dl { display: grid; gap: 14px; margin: 0; }
.domestic-product dl div { display: grid; grid-template-columns: 74px 1fr; gap: 14px; }
.domestic-product dt { color: var(--ink); font-size: 13px; font-weight: 800; }
.domestic-product dd { margin: 0; color: #536178; font-size: 14px; line-height: 1.65; }
.domestic-product > a { align-self: start; margin-top: auto; padding-top: 24px; color: var(--blue-dark); font-size: 14px; font-weight: 760; }
.domestic-product > a:hover { color: var(--blue); text-decoration: underline; text-underline-offset: 4px; }

.domestic-benefits {
  display: grid;
  grid-template-columns: minmax(220px, 0.55fr) 1fr;
  gap: 50px;
  margin-top: 46px;
  padding: 34px 0 4px;
  border-top: 2px solid var(--ink);
}

.domestic-benefits h3 { margin: 0; font-size: 25px; line-height: 1.35; }
.domestic-benefits > div { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 36px; }
.domestic-benefits p { margin: 0; }
.domestic-benefits strong { display: block; margin-bottom: 5px; }
.domestic-benefits span { display: block; color: var(--muted); font-size: 14px; line-height: 1.7; }

.domestic-caveat {
  margin: 34px 0 0;
  padding: 18px 22px;
  border-left: 4px solid var(--amber);
  color: #4b5b72;
  background: var(--amber-soft);
}

.section-alternatives { background: #fff; }
.alternative-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-strong); border-left: 1px solid var(--line-strong); }
.alternative-card { min-height: 230px; padding: 26px; border-right: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); background: #fff; transition: background 150ms ease, transform 150ms ease; }
.alternative-card:hover { position: relative; z-index: 1; background: #f6f9ff; transform: translateY(-3px); }
.alternative-card h3 { margin: 34px 0 12px; font-size: 25px; letter-spacing: -0.025em; }
.alternative-card p { color: var(--muted); line-height: 1.65; }
.alternative-card small { display: block; margin-top: 26px; color: var(--blue-dark); }
.card-code { color: var(--amber); }

.centered-heading { max-width: 760px; margin-inline: auto; text-align: center; }
.centered-heading > p:last-child { max-width: 650px; margin: 18px auto 0; }

.need-list { border-top: 2px solid var(--ink); }
.need-item { display: grid; grid-template-columns: 70px minmax(0, 1fr) minmax(170px, 0.35fr); gap: 28px; align-items: center; padding: 30px 12px; border-bottom: 1px solid var(--line-strong); scroll-margin-top: 100px; }
.need-item > span { color: var(--amber); font-family: var(--font-mono); font-size: 14px; }
.need-item h3 { margin-bottom: 5px; font-size: 23px; }
.need-item p { margin: 0; color: var(--muted); }
.need-item > small { justify-self: end; padding: 7px 10px; border: 1px solid var(--line); border-radius: 999px; color: #55647a; background: #fff; font-size: 11px; }

.section-guides { color: #fff; background: var(--night); }
.guide-layout { display: grid; grid-template-columns: 0.65fr 1fr; gap: 90px; }
.guide-heading { position: sticky; top: 122px; align-self: start; }
.guide-heading > p { color: #b7c2d5; }
.guide-definitions { margin: 0; border-top: 1px solid #455877; }
.guide-definitions div { display: grid; grid-template-columns: 170px 1fr; gap: 30px; padding: 26px 4px; border-bottom: 1px solid #455877; }
.guide-definitions dt { color: #fff; font-size: 18px; font-weight: 800; }
.guide-definitions dd { margin: 0; color: #bdc9db; }

.method-grid { display: grid; grid-template-columns: 0.72fr 1fr; gap: 100px; }
.method-intro > p:last-child { margin-top: 22px; }
.method-steps { margin: 0; padding: 0; list-style: none; border-top: 2px solid var(--ink); }
.method-steps li { display: grid; grid-template-columns: 40px 1fr; gap: 20px; padding: 24px 8px; border-bottom: 1px solid var(--line-strong); }
.method-steps li > span { color: var(--amber); font-family: var(--font-mono); }
.method-steps strong { display: block; margin-bottom: 5px; }
.method-steps p { margin: 0; color: var(--muted); }

.method-disclosure {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--line-strong);
}

.method-disclosure p { max-width: 820px; margin: 0; color: var(--muted); }
.method-disclosure a { flex: 0 0 auto; color: var(--blue-dark); font-size: 14px; font-weight: 760; }
.method-disclosure a:hover { color: var(--blue); text-decoration: underline; text-underline-offset: 4px; }

.section-faq { background: #fff; }
.faq-grid { display: grid; grid-template-columns: 0.65fr 1fr; gap: 100px; }
.faq-heading { position: sticky; top: 122px; align-self: start; }
.faq-list { border-top: 2px solid var(--ink); }
.faq-list details { border-bottom: 1px solid var(--line-strong); }
.faq-list summary { position: relative; padding: 23px 48px 23px 4px; font-size: 18px; font-weight: 760; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { position: absolute; top: 23px; right: 8px; color: var(--blue); content: "+"; font-family: var(--font-mono); font-size: 24px; line-height: 1; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: -4px 0 24px; padding-right: 44px; color: var(--muted); }

.closing-cta { padding: 70px 0; color: #fff; background: var(--blue); }
.closing-inner { display: flex; align-items: center; justify-content: space-between; gap: 60px; }
.closing-inner h2 { margin-bottom: 14px; }
.closing-inner > div > p { color: #d8e3fb; }
.button-light { flex: 0 0 auto; color: var(--blue-dark); background: #fff; }
.button-light:hover { background: #eef4ff; }

.trust-page-hero {
  padding: 72px 0 62px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(36, 92, 200, 0.045) 1px, transparent 1px),
    linear-gradient(rgba(36, 92, 200, 0.045) 1px, transparent 1px),
    var(--paper);
  background-size: 48px 48px;
}

.trust-breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; color: #68768b; font-size: 13px; }
.trust-breadcrumb a:hover { color: var(--blue-dark); }
.trust-page-hero h1 { max-width: 860px; margin: 0; font-size: clamp(42px, 6vw, 72px); line-height: 1.06; letter-spacing: -0.045em; }
.trust-page-hero p { max-width: 760px; margin: 24px 0 0; color: var(--muted); font-size: 19px; }
.trust-page-meta { display: flex; flex-wrap: wrap; gap: 10px 26px; margin-top: 28px; color: #718096; font-size: 12px; }

.trust-page-section { padding: 84px 0; }
.trust-page-section + .trust-page-section { border-top: 1px solid var(--line); }
.trust-page-section.white { background: #fff; }
.trust-page-intro { display: grid; grid-template-columns: minmax(250px, .55fr) 1fr; gap: 80px; }
.trust-page-intro h2 { margin: 0; font-size: clamp(32px, 4vw, 48px); line-height: 1.18; letter-spacing: -0.035em; }
.trust-page-copy { color: var(--muted); }
.trust-page-copy > :first-child { margin-top: 0; }
.trust-page-copy > :last-child { margin-bottom: 0; }
.trust-page-copy h3 { margin: 34px 0 8px; color: var(--ink); font-size: 21px; }
.trust-page-copy ul, .trust-page-copy ol { padding-left: 1.25rem; }
.trust-page-copy li + li { margin-top: 10px; }
.trust-page-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 42px; border-top: 1px solid var(--line-strong); border-left: 1px solid var(--line-strong); }
.trust-page-card { padding: 28px; border-right: 1px solid var(--line-strong); border-bottom: 1px solid var(--line-strong); background: #fff; }
.trust-page-card h3 { margin: 0 0 12px; font-size: 21px; }
.trust-page-card p { margin: 0; color: var(--muted); }
.trust-page-cta { margin-top: 34px; }
.trust-page-cta a { color: var(--blue-dark); font-weight: 760; text-decoration: underline; text-underline-offset: 4px; }

.site-footer { padding: 70px 0 24px; color: #c4ccda; background: #0d192d; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 0.6fr 0.6fr; gap: 70px; }
.brand-footer { color: #fff; }
.brand-footer .brand-copy small { color: #96a4ba; }
.footer-grid > div > p { max-width: 420px; margin: 22px 0 0; color: #96a4ba; }
.footer-grid nav { display: grid; align-content: start; gap: 10px; }
.footer-grid nav strong { margin-bottom: 5px; color: #fff; font-size: 13px; }
.footer-grid nav a { color: #aab5c7; font-size: 14px; }
.footer-grid nav a:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 30px; margin-top: 60px; padding-top: 22px; border-top: 1px solid #293a55; color: #7e8da5; font-size: 12px; }
.footer-bottom p { margin: 0; }
.footer-trust-inline { display: flex; gap: 20px; padding-top: 24px; color: #aab5c7; font-size: 13px; }
.footer-trust-inline a:hover { color: #fff; }

@media (max-width: 980px) {
  .desktop-nav { display: none; }
  .mobile-nav { display: block; }
  .hero-grid { grid-template-columns: 1fr; gap: 54px; }
  .decision-board { max-width: 680px; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid p:nth-child(3) { border-left: 0; border-top: 1px solid var(--line); }
  .trust-grid p:nth-child(4) { border-top: 1px solid var(--line); }
  .comparison-row { grid-template-columns: minmax(210px, 0.65fr) 1fr 1fr; gap: 20px; }
  .alternative-grid { grid-template-columns: repeat(2, 1fr); }
  .domestic-benefits { grid-template-columns: 1fr; gap: 22px; }
  .model-tier-grid,
  .specialist-model-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .model-tier:last-child,
  .specialist-model-video { grid-column: 1 / -1; }
  .specialist-heading { grid-template-columns: 1fr; gap: 18px; }
  .guide-layout, .method-grid, .faq-grid { grid-template-columns: 1fr; gap: 48px; }
  .trust-page-intro { grid-template-columns: 1fr; gap: 34px; }
  .trust-page-grid { grid-template-columns: 1fr; }
  .guide-heading, .faq-heading { position: static; }
}

@media (max-width: 720px) {
  :root { --shell: min(100% - 28px, 1180px); }
  .independence-note .shell { padding-block: 7px; line-height: 1.45; }
  .header-inner { min-height: 68px; }
  .brand-copy small { display: none; }
  .hero { padding: 64px 0 56px; }
  h1 { font-size: clamp(40px, 12vw, 58px); }
  .hero-title-main,
  .hero #hero-title em { white-space: normal; }
  .hero-title-main { font-size: clamp(38px, 11vw, 50px); }
  .hero #hero-title em { font-size: clamp(27px, 8vw, 36px); }
  .hero-lede { font-size: 18px; }
  .hero-actions { display: grid; grid-template-columns: 1fr; }
  .button { width: 100%; }
  .decision-board { padding: 22px 18px; }
  .decision-map-figure { padding-top: 34px; }
  .decision-map-figure .shell { width: min(100% - 16px, 1180px); }
  .decision-map-figure img { border-radius: var(--radius-sm); }
  .decision-map-figure figcaption { padding-inline: 6px; }
  .decision-list a { grid-template-columns: 28px 1fr; }
  .decision-list small { grid-column: 2; }
  .trust-grid { grid-template-columns: 1fr; }
  .trust-grid p + p { border-left: 0; border-top: 1px solid var(--line); }
  .section { padding: 76px 0; }
  .heading-split { grid-template-columns: 1fr; gap: 20px; }
  .section-heading h2, .method-intro h2, .faq-heading h2, .closing-inner h2 { font-size: 36px; }
  .comparison-row { grid-template-columns: 1fr; gap: 18px; padding: 26px 5px; }
  .pair { font-size: 21px; }
  .answer-note { grid-template-columns: 1fr; padding: 22px; }
  .answer-mark { width: 48px; height: 48px; }
  .alternative-grid { grid-template-columns: 1fr; }
  .domestic-answer { grid-template-columns: 1fr; gap: 8px; padding: 20px 16px; }
  .domestic-product-grid { grid-template-columns: 1fr; }
  .domestic-product { min-height: 0; padding: 24px 20px; }
  .domestic-product-head { display: grid; gap: 8px; }
  .domestic-product h3 { text-align: left; }
  .domestic-product > a { margin-top: 24px; padding-top: 0; }
  .domestic-benefits > div { grid-template-columns: 1fr; gap: 22px; }
  .model-tier-grid,
  .specialist-model-grid { grid-template-columns: 1fr; }
  .model-tier:last-child,
  .specialist-model-video { grid-column: auto; }
  .model-tier { padding: 24px 20px; }
  .model-role { min-height: 0; }
  .specialist-heading { margin-top: 54px; }
  .specialist-model { padding: 22px 20px; }
  .alternative-card { min-height: 0; }
  .need-item { grid-template-columns: 42px 1fr; gap: 14px; padding: 25px 4px; }
  .need-item > small { grid-column: 2; justify-self: start; }
  .guide-definitions div { grid-template-columns: 1fr; gap: 6px; }
  .method-disclosure { display: grid; gap: 16px; }
  .faq-list details p { padding-right: 0; }
  .closing-inner { display: grid; gap: 30px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 46px 30px; }
  .footer-grid > div { grid-column: 1 / -1; }
  .footer-bottom { display: grid; }
  .trust-page-hero { padding: 52px 0 46px; }
  .trust-page-hero h1 { font-size: clamp(38px, 11vw, 52px); }
  .trust-page-section { padding: 68px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  /* Accessibility override: user motion preferences must take priority over component transitions. */
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}

@media (forced-colors: active) {
  .brand-mark,
  .decision-board,
  .alternative-card,
  .button,
  .need-item > small { border: 1px solid CanvasText; }
  .status-dot,
  .brand-mark i,
  .answer-mark { background: CanvasText; }
}