:root {
  --ink: #101828;
  --text: #2c3b50;
  --muted: #5f6c7d;
  --line: #dce3ea;
  --line-strong: #c8d3df;
  --paper: #f5f7fa;
  --paper-deep: #eef2f6;
  --white: #ffffff;
  --blue: #2457c5;
  --blue-dark: #173c8f;
  --teal: #16877d;
  --teal-dark: #0f625c;
  --soft-blue: #edf3ff;
  --soft-teal: #edf8f6;
  --soft-amber: #fff8ec;
  --shadow: 0 18px 48px rgba(16, 24, 40, 0.075);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--white);
  color: var(--text);
  font-family: var(--font-sans);
  font-weight: 400;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body.nav-menu-open { overflow: hidden; }
main:focus { outline: none; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--blue); }
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(36, 87, 197, 0.3);
  outline-offset: 3px;
}
img { max-width: 100%; }
.shell { width: min(1140px, calc(100% - 56px)); margin: 0 auto; }
.skip-link {
  position: fixed;
  top: 10px;
  left: 12px;
  z-index: 100;
  border-radius: 5px;
  background: var(--ink);
  color: #fff;
  font-size: 14px;
  font-weight: 650;
  padding: 10px 14px;
  transform: translateY(-160%);
  transition: transform 140ms ease;
}
.skip-link:focus { color: #fff; transform: translateY(0); }

.content-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(220, 227, 234, 0.96);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 1px 12px rgba(16, 24, 40, 0.035);
  backdrop-filter: blur(18px) saturate(1.08);
}
.content-nav { position: relative; display: flex; min-height: 72px; align-items: center; gap: 25px; }
.content-brand { display: flex; min-width: 188px; align-items: center; gap: 11px; }
.content-brand img { display: block; width: auto; height: 30px; max-width: 160px; object-fit: contain; }
.content-brand small { color: #737f8f; font-size: 11.5px; line-height: 1.3; }
.content-nav-links { display: flex; align-items: center; gap: 27px; margin-left: auto; color: #344054; font-size: 14px; font-weight: 620; }
.content-nav-links a { position: relative; display: inline-flex; min-height: 44px; align-items: center; }
.content-nav-links a::after {
  position: absolute;
  right: 0;
  bottom: 4px;
  left: 0;
  height: 2px;
  background: var(--blue);
  content: "";
  transform: scaleX(0);
  transition: transform 160ms ease;
}
.content-nav-links a:hover,
.content-nav-links a[aria-current="page"] { color: var(--blue); }
.content-nav-links a:hover::after,
.content-nav-links a[aria-current="page"]::after { transform: scaleX(1); }
.content-nav-cta {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  border-radius: 6px;
  background: var(--ink);
  color: #fff;
  font-size: 14px;
  font-weight: 650;
  padding: 0 17px;
  transition: background-color 160ms ease, border-color 160ms ease;
}
.content-nav-cta:hover { border-color: var(--blue-dark); background: var(--blue-dark); color: #fff; }
.content-nav-cta[aria-current="page"] { box-shadow: 0 0 0 3px rgba(36, 87, 197, 0.13); }
.content-nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 22px;
}
.content-nav-panel { display: contents; }

.draft-notice { border-bottom: 1px solid #ead8b8; background: var(--soft-amber); color: #704a17; font-size: 14px; line-height: 1.7; padding: 12px 0; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.6; list-style: none; padding: 0; }
.breadcrumb li:not(:last-child)::after { margin-left: 8px; color: #9ca7b5; content: "/"; }
.breadcrumb a { text-decoration: underline; text-decoration-color: transparent; text-underline-offset: 4px; }
.breadcrumb a:hover { color: var(--blue); text-decoration-color: currentColor; }
.page-hero {
  border-bottom: 1px solid var(--line);
  background: linear-gradient(110deg, rgba(36, 87, 197, 0.065), transparent 48%), #f8fafc;
  padding: 50px 0 46px;
}
.page-hero .breadcrumb { margin-bottom: 20px; }
.page-hero-level-one { padding: 62px 0 54px; }
.eyebrow { color: var(--blue); font-size: 12px; font-weight: 720; letter-spacing: 0.07em; text-transform: uppercase; }
h1,
h2,
h3 { color: var(--ink); font-weight: 700; line-break: strict; overflow-wrap: break-word; text-wrap: balance; }
h1 { max-width: 900px; margin: 11px 0 0; font-size: clamp(38px, 4vw, 48px); line-height: 1.2; letter-spacing: -0.023em; }
body[data-content-kind="qa"] h1 { max-width: 840px; font-size: clamp(36px, 3.8vw, 46px); }
.page-lead { max-width: 780px; margin: 16px 0 0; color: #526174; font-size: 18px; line-height: 1.76; }
.meta-row { display: flex; flex-wrap: wrap; gap: 11px 20px; margin-top: 17px; color: var(--muted); font-size: 13px; }
.status-badge,
.topic-badge { display: inline-flex; align-items: center; border-radius: 999px; font-size: 12px; font-weight: 650; line-height: 1.2; padding: 6px 10px; }
.status-badge { border: 1px solid #dfc89f; background: var(--soft-amber); color: #7a4d0e; }
.topic-badge { background: var(--soft-blue); color: var(--blue-dark); }

.content-main { padding: 50px 0 90px; }
.article-layout { display: grid; grid-template-columns: minmax(0, 760px) 252px; justify-content: space-between; gap: 66px; align-items: start; }
.article-body { min-width: 0; }
.article-body > :first-child { margin-top: 0; }
.article-body h2 { margin: 50px 0 17px; font-size: 29px; line-height: 1.36; }
.article-body h3 { margin: 34px 0 12px; font-size: 22px; line-height: 1.45; }
.article-body p,
.article-body li { color: #35445a; font-size: 18px; line-height: 1.82; }
.article-body p { margin: 0 0 22px; }
.article-body ul,
.article-body ol { margin: 0 0 26px; padding-left: 1.4em; }
.article-body li { padding-left: 0.12em; }
.article-body li + li { margin-top: 9px; }
.article-body a { color: var(--blue-dark); font-weight: 530; text-decoration: underline; text-decoration-color: rgba(23, 60, 143, 0.4); text-underline-offset: 4px; }
.article-body a:hover { color: var(--blue); text-decoration-color: currentColor; }
.article-body a:visited { color: #4a468f; }
.article-body blockquote {
  margin: 32px 0;
  border-left: 4px solid var(--teal);
  background: var(--soft-teal);
  color: #263f45;
  padding: 22px 25px;
  font-size: 17px;
  line-height: 1.82;
}
.article-body blockquote strong { color: var(--teal-dark); }
.article-body blockquote.scenario-note { border: 1px solid #cfe2df; border-left: 4px solid var(--teal); border-radius: 6px; background: #f5faf9; }
.article-body blockquote.scenario-note strong { display: inline-block; margin-bottom: 4px; }
.direct-answer {
  margin-bottom: 36px;
  border: 1px solid #cbd9ef;
  border-left: 4px solid var(--blue);
  border-radius: 7px;
  background: #f5f8fd;
  padding: 23px 25px;
}
.direct-answer strong { display: block; margin-bottom: 9px; color: var(--blue-dark); font-size: 14px; font-weight: 720; letter-spacing: 0.02em; }
.direct-answer p { margin: 0; color: #243650; font-size: 18px; line-height: 1.78; }
body[data-content-kind="qa"] .direct-answer { margin-bottom: 32px; padding: 21px 23px; }
body[data-content-kind="qa"] .direct-answer p { font-size: 17.5px; }
.core-conclusion {
  position: relative;
  margin: 50px 0 0;
  border: 1px solid #c9dedb;
  border-left: 4px solid var(--teal);
  border-radius: 7px;
  background: #f3f9f8;
  padding: 24px 26px;
}
.core-conclusion strong { display: block; margin-bottom: 9px; color: var(--teal-dark); font-size: 13px; font-weight: 720; letter-spacing: 0.04em; }
.core-conclusion p { margin: 0; color: #1f3840; font-size: 18px; font-weight: 570; line-height: 1.78; }
body[data-content-kind="qa"] .core-conclusion { margin-top: 42px; padding: 21px 23px; }
body[data-content-kind="qa"] .core-conclusion p { font-size: 17px; }
.article-figure { margin: 38px 0 42px; }
.article-figure-zoom { display: block; border-radius: 8px; cursor: zoom-in; }
.article-figure-zoom:focus-visible { outline-color: rgba(36, 87, 197, 0.46); }
.article-figure img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: 8px; background: #f8fafc; }
.article-figure figcaption { margin-top: 12px; color: var(--muted); font-size: 13.5px; line-height: 1.68; }
.article-aside { position: sticky; top: 104px; display: grid; gap: 18px; }
.aside-card { border: 1px solid var(--line); border-top: 2px solid var(--ink); background: #f8fafc; padding: 20px; }
.aside-card h2 { margin: 0; font-size: 16px; line-height: 1.4; }
.aside-card p,
.aside-card li { color: var(--muted); font-size: 13.5px; line-height: 1.72; }
.aside-card p { margin: 12px 0 0; }
.aside-card ul { margin: 14px 0 0; padding: 0; list-style: none; }
.aside-card li + li { margin-top: 10px; }
.aside-card a { color: var(--blue-dark); text-decoration: underline; text-decoration-color: transparent; text-underline-offset: 3px; }
.aside-card a:hover { color: var(--blue); text-decoration-color: currentColor; }
.boundary-note { margin-top: 56px; border: 1px solid var(--line); border-radius: 6px; background: #f8fafc; padding: 25px 27px; }
.boundary-note h2 { margin: 0 0 12px; font-size: 19px; }
.boundary-note p { margin: 0; color: #546275; font-size: 15px; line-height: 1.78; }
.related-section { margin-top: 62px; }
.related-section > h2 { margin: 0 0 18px; font-size: 24px; }
.related-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.related-list a { display: block; border-bottom: 1px solid var(--line); color: var(--blue-dark); font-size: 15px; font-weight: 570; line-height: 1.55; padding: 14px 2px; }
.related-list a:hover { color: var(--blue); }

.listing-main { padding: 60px 0 94px; }
.listing-main-level-one { padding-top: 66px; }
.listing-head { display: grid; grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr); gap: 70px; align-items: end; margin-bottom: 38px; }
.listing-head h1 { margin-top: 10px; font-size: clamp(38px, 4vw, 48px); }
.listing-head p { margin: 0; color: var(--muted); font-size: 17px; line-height: 1.78; }
.filter-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 32px; }
.listing-results { display: grid; gap: 54px; }
.card-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.insight-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.content-card {
  display: flex;
  min-height: 270px;
  flex-direction: column;
  border: 1px solid var(--line);
  border-top: 3px solid var(--ink);
  border-radius: 6px;
  background: #fff;
  padding: 25px;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}
.content-card:hover { border-color: #b8c8df; box-shadow: 0 12px 28px rgba(16, 24, 40, 0.065); transform: translateY(-2px); }
.content-card h2 { margin: 20px 0 11px; font-size: 22px; line-height: 1.45; }
.content-card h2 a { text-decoration: underline; text-decoration-color: transparent; text-underline-offset: 4px; }
.content-card h2 a:hover { text-decoration-color: currentColor; }
.content-card p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.72; }
.card-meta { display: flex; flex-wrap: wrap; gap: 8px; }
.card-link { margin-top: auto; padding-top: 24px; color: var(--blue-dark); font-size: 14px; font-weight: 650; }
.card-link:hover { color: var(--blue); }
.qa-topic-group { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 38px; align-items: start; }
.qa-topic-head { position: sticky; top: 102px; border-top: 2px solid var(--ink); padding-top: 16px; }
.qa-topic-head h2 { margin: 0; font-size: 22px; line-height: 1.4; }
.qa-topic-head p { margin: 10px 0 0; color: var(--muted); font-size: 14px; line-height: 1.7; }
.qa-grid { grid-template-columns: 1fr; }
.qa-grid .content-card { min-height: 0; border-top-width: 1px; padding: 23px 25px; }
.qa-grid .content-card h2 { margin-top: 14px; font-size: 21px; }
.qa-number { color: var(--blue-dark); font-size: 12px; font-weight: 750; }

.about-facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; margin: 42px 0; border: 1px solid var(--line); background: var(--line); }
.about-facts div { background: #fff; padding: 22px; }
.about-facts strong { display: block; color: var(--ink); font-size: 18px; }
.about-facts span { display: block; margin-top: 8px; color: var(--muted); font-size: 14px; line-height: 1.65; }
.contact-application-layout { display: grid; grid-template-columns: minmax(0, 0.84fr) minmax(460px, 1.16fr); gap: 68px; align-items: start; }
.contact-application-copy > h2:first-child { margin-top: 0; }
.contact-form-panel { border: 1px solid var(--line); border-radius: 7px; background: #fff; box-shadow: var(--shadow); padding: 29px; }
.contact-form-heading { margin-bottom: 24px; border-bottom: 1px solid var(--line); padding-bottom: 20px; }
.contact-form-heading h2 { margin: 10px 0 0; font-size: 25px; line-height: 1.4; }
.contact-form-heading p { margin: 8px 0 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
.contact-form { position: relative; display: grid; gap: 15px; }
.form-honeypot { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); margin: -1px; padding: 0; white-space: nowrap; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.contact-form label { display: grid; gap: 8px; color: #445267; font-size: 13.5px; font-weight: 620; }
.contact-form input,
.contact-form select,
.contact-form textarea { width: 100%; border: 1px solid #cfd8e3; border-radius: 5px; background: #fff; color: var(--ink); font: inherit; padding: 12px 13px; }
.contact-form input,
.contact-form select { min-height: 46px; }
.contact-form textarea { min-height: 132px; resize: vertical; }
.form-status { margin: 0; border-radius: 5px; background: var(--soft-blue); color: var(--blue-dark); font-size: 13px; line-height: 1.6; padding: 10px 12px; }
.form-status.is-error { background: #fff1f1; color: #8f2525; }
.contact-form button[disabled] { cursor: wait; opacity: 0.68; }
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: #7d8999; }
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus { border-color: var(--blue); outline: none; box-shadow: 0 0 0 4px rgba(36, 87, 197, 0.12); }
.required-mark { color: #b42318; }
.form-submit-note { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
.submit { min-height: 48px; border: 0; border-radius: 5px; background: var(--blue-dark); color: #fff; cursor: pointer; font: inherit; font-weight: 650; }
.submit:hover { background: var(--blue); }

.geo-method-hero {
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(118deg, rgba(36, 87, 197, 0.08), transparent 46%),
    linear-gradient(300deg, rgba(0, 130, 122, 0.07), transparent 44%),
    #f8fafc;
  padding: 44px 0 46px;
}
.geo-method-hero .breadcrumb { margin-bottom: 20px; }
.geo-method-hero h1 { max-width: 940px; }
.geo-method-lead { max-width: 880px; margin: 17px 0 0; color: #34445b; font-size: 18px; line-height: 1.78; }
.geo-method-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 21px; }
.geo-primary-button,
.geo-secondary-button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 680;
  padding: 0 19px;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}
.geo-primary-button { border: 1px solid var(--blue-dark); background: var(--blue-dark); color: #fff; }
.geo-primary-button:hover { border-color: var(--blue); background: var(--blue); color: #fff; }
.geo-secondary-button { border: 1px solid #b7c4d5; background: #fff; color: var(--blue-dark); }
.geo-secondary-button:hover { border-color: var(--blue); color: var(--blue); }
.geo-method-main { padding: 58px 0 88px; }
.geo-method-main > .shell { display: grid; gap: 28px; }
.geo-method-section { border-top: 1px solid var(--line); padding-top: 27px; }
.geo-method-section-head h2 { margin: 0; font-size: 27px; line-height: 1.38; }
.geo-method-section-copy { max-width: 920px; margin-top: 14px; }
.geo-method-section-copy p,
.geo-method-section-copy li { color: #3c4a5f; font-size: 16.5px; line-height: 1.82; }
.geo-method-section-copy p { margin: 0 0 17px; }
.geo-method-section-copy ul,
.geo-method-section-copy ol { margin: 0; padding-left: 1.35em; }
.geo-method-section-copy li + li { margin-top: 8px; }
.geo-method-section-copy a { color: var(--blue-dark); font-weight: 560; text-decoration: underline; text-decoration-color: rgba(23, 60, 143, 0.36); text-underline-offset: 4px; }
.geo-method-section-copy a:hover { color: var(--blue); text-decoration-color: currentColor; }
.geo-method-intro { display: grid; grid-template-columns: minmax(250px, 0.38fr) minmax(0, 1fr); gap: 54px; padding: 0 0 14px; border-top: 0; }
.geo-method-intro .geo-method-section-copy { margin-top: 0; }
.geo-stage-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; margin-top: 19px; border: 1px solid var(--line); background: var(--line); }
.geo-stage-card { background: #fff; padding: 21px 22px; }
.geo-stage-card > span { display: block; color: var(--teal-dark); font-size: 12px; font-weight: 760; letter-spacing: 0.08em; }
.geo-stage-card h3 { margin: 10px 0 8px; font-size: 19px; line-height: 1.42; }
.geo-stage-card p { margin: 0; color: #4d5a6d; font-size: 15.5px; line-height: 1.76; }
.geo-stage-figure { max-width: 760px; margin: 24px auto 0; }
.geo-stage-figure a { display: block; border-radius: 8px; }
.geo-stage-figure img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: 8px; background: #f8fafc; }
.geo-stage-figure figcaption { margin-top: 11px; color: var(--muted); font-size: 13.5px; line-height: 1.68; }
.geo-method-note { max-width: 920px; margin: 17px 0 0; border-left: 3px solid var(--teal); background: var(--soft-teal); color: #355058; font-size: 14.5px; line-height: 1.75; padding: 14px 17px; }
.geo-method-observations .geo-method-section-copy ul { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; padding: 0; list-style: none; }
.geo-method-observations .geo-method-section-copy li { border: 1px solid var(--line); border-radius: 6px; background: #fff; padding: 14px 15px; }
.geo-method-split,
.geo-method-contrast { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.geo-method-split .geo-method-section,
.geo-method-contrast .geo-method-section { border: 1px solid var(--line); border-radius: 7px; background: #fff; padding: 28px; }
.geo-method-split .geo-method-section-head h2,
.geo-method-contrast .geo-method-section-head h2 { font-size: 25px; }
.geo-method-can { border-top: 3px solid var(--teal) !important; background: #f6faf9 !important; }
.geo-method-cannot { border-top: 3px solid #9a5c16 !important; background: #fcfaf6 !important; }
.geo-method-role,
.geo-method-boundary,
.geo-method-reading { max-width: 980px; }
.geo-method-boundary { border: 1px solid var(--line); border-radius: 7px; background: #f8fafc; padding: 28px; }
.geo-method-boundary .geo-method-section-head h2 { font-size: 23px; }
.geo-method-boundary .geo-method-section-copy p { color: #536174; font-size: 15px; }
.geo-method-reading .geo-method-section-copy ul { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 28px; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.geo-method-reading .geo-method-section-copy li { margin: 0; border-bottom: 1px solid var(--line); padding: 14px 2px; }
.geo-method-contact { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 42px; align-items: center; margin-top: 18px; border-top: 3px solid var(--ink); background: #f4f7fa; padding: 34px; }
.geo-method-contact h2 { max-width: 720px; margin: 10px 0 0; font-size: 27px; line-height: 1.4; }
.geo-method-contact p { max-width: 760px; margin: 12px 0 0; color: var(--muted); font-size: 15px; line-height: 1.72; }

.content-footer { border-top: 1px solid var(--line); background: #fff; padding: 28px 0; }
.footer-row { display: flex; justify-content: space-between; gap: 32px; color: #687586; font-size: 12.5px; line-height: 1.7; }
.footer-row strong { color: #475467; font-weight: 650; }
.footer-regulatory { display: grid; gap: 1px; text-align: right; }
.footer-regulatory a { text-decoration: underline; text-decoration-color: rgba(104, 117, 134, 0.42); text-underline-offset: 2px; }

@media (max-width: 1120px) {
  .insight-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 1020px) {
  .content-nav-toggle { display: inline-flex; margin-left: auto; }
  .content-nav-panel { position: absolute; top: calc(100% + 1px); right: 0; left: 0; z-index: 30; display: none; max-height: calc(100vh - 74px); max-height: calc(100dvh - 74px); flex-direction: column; gap: 8px; overflow-y: auto; overscroll-behavior: contain; border: 1px solid var(--line); border-radius: 7px; background: #fff; padding: 10px; padding-bottom: max(10px, calc(10px + env(safe-area-inset-bottom))); box-shadow: var(--shadow); -webkit-overflow-scrolling: touch; }
  .content-nav-panel.is-open { display: flex; }
  .content-nav-links { position: static; display: flex; flex-direction: column; align-items: stretch; gap: 0; margin-left: 0; }
  .content-nav-links a { min-height: 46px; border-radius: 5px; padding: 0 12px; }
  .content-nav-links a::after { display: none; }
  .content-nav-links a:hover,
  .content-nav-links a[aria-current="page"] { background: var(--soft-blue); }
  .content-nav-panel .content-nav-cta { width: 100%; justify-content: center; }
  .article-layout,
  .listing-head,
  .contact-application-layout,
  .geo-method-intro { grid-template-columns: 1fr; gap: 36px; }
  .article-aside { position: static; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .qa-topic-group { grid-template-columns: 1fr; gap: 18px; }
  .qa-topic-head { position: static; }
  .geo-stage-grid { grid-template-columns: 1fr; }
  .geo-method-observations .geo-method-section-copy ul { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 1020px) and (max-height: 520px) {
  .content-nav-panel { padding-bottom: max(64px, calc(20px + env(safe-area-inset-bottom))); }
}

@media (max-width: 720px) {
  html { scroll-padding-top: 72px; }
  .shell { width: min(100% - 32px, 1140px); }
  .content-nav { min-height: 64px; gap: 12px; }
  .content-brand { min-width: 0; }
  .content-brand img { height: 27px; max-width: 128px; }
  .content-brand small { display: none; }
  .page-hero { padding: 46px 0 42px; }
  .page-hero-level-one { padding: 54px 0 48px; }
  .geo-method-hero { padding: 38px 0 46px; }
  .geo-method-hero .breadcrumb { margin-bottom: 22px; }
  .geo-method-lead { margin-top: 18px; font-size: 17px; line-height: 1.76; }
  .geo-method-actions { align-items: stretch; flex-direction: column; margin-top: 23px; }
  .geo-primary-button,
  .geo-secondary-button { width: 100%; }
  .geo-method-main { padding: 50px 0 72px; }
  .geo-method-main > .shell { gap: 28px; }
  .geo-method-section { padding-top: 27px; }
  .geo-method-section-head h2 { font-size: 25px; }
  .geo-method-section-copy p,
  .geo-method-section-copy li { font-size: 16.5px; line-height: 1.78; }
  .geo-stage-card { padding: 22px 20px; }
  .geo-stage-card h3 { font-size: 20px; }
  .geo-stage-figure { margin-top: 26px; }
  .geo-stage-figure figcaption { font-size: 13px; }
  .geo-stage-figure figcaption::after { display: block; margin-top: 4px; color: var(--blue-dark); content: "轻触图片查看原图"; font-size: 12px; font-weight: 600; }
  .geo-method-observations .geo-method-section-copy ul,
  .geo-method-split,
  .geo-method-contrast,
  .geo-method-reading .geo-method-section-copy ul,
  .geo-method-contact { grid-template-columns: 1fr; }
  .geo-method-split .geo-method-section,
  .geo-method-contrast .geo-method-section,
  .geo-method-boundary { padding: 23px 20px; }
  .geo-method-contact { gap: 22px; padding: 27px 21px; }
  .geo-method-contact h2 { font-size: 24px; }
  .page-hero .breadcrumb { margin-bottom: 20px; }
  h1,
  body[data-content-kind="qa"] h1 { font-size: clamp(32px, 9vw, 36px); line-height: 1.24; letter-spacing: -0.018em; }
  .page-lead { margin-top: 16px; font-size: 16.5px; line-height: 1.72; }
  .meta-row { margin-top: 19px; }
  .content-main,
  .listing-main { padding: 48px 0 70px; }
  .listing-main-level-one { padding-top: 54px; }
  .listing-head { gap: 20px; margin-bottom: 28px; }
  .listing-head h1 { font-size: 36px; line-height: 1.24; }
  .listing-head p { font-size: 16px; }
  .article-body h2 { margin-top: 46px; font-size: 26px; line-height: 1.38; }
  .article-body h3 { margin-top: 31px; font-size: 21px; }
  .article-body p,
  .article-body li { font-size: 17px; line-height: 1.8; }
  .article-body p { margin-bottom: 20px; }
  .article-body blockquote { margin: 28px 0; padding: 20px 19px; font-size: 16.5px; line-height: 1.76; }
  .direct-answer,
  body[data-content-kind="qa"] .direct-answer { margin-bottom: 34px; padding: 20px; }
  .direct-answer p,
  body[data-content-kind="qa"] .direct-answer p { font-size: 17px; line-height: 1.75; }
  .core-conclusion,
  body[data-content-kind="qa"] .core-conclusion { margin-top: 40px; padding: 20px; }
  .core-conclusion p,
  body[data-content-kind="qa"] .core-conclusion p { font-size: 17px; line-height: 1.75; }
  .boundary-note { margin-top: 46px; padding: 22px 20px; }
  .boundary-note p { font-size: 14.5px; }
  .article-figure { margin: 31px 0 35px; }
  .article-figure figcaption { font-size: 13px; }
  .article-figure figcaption::after { display: block; margin-top: 4px; color: var(--blue-dark); content: "轻触图片查看原图"; font-size: 12px; font-weight: 600; }
  .card-grid,
  .insight-grid,
  .article-aside,
  .about-facts,
  .form-grid { grid-template-columns: 1fr; }
  .content-card { min-height: 0; padding: 22px 20px; }
  .content-card h2,
  .qa-grid .content-card h2 { font-size: 20px; }
  .qa-topic-group { gap: 16px; }
  .qa-topic-head { padding-top: 14px; }
  .contact-form-panel { padding: 23px 19px; }
  .footer-row { flex-direction: column; gap: 12px; }
  .footer-regulatory { text-align: left; }
}

@media (max-width: 390px) {
  h1,
  body[data-content-kind="qa"] h1 { font-size: 32px; }
  .draft-notice { font-size: 13px; }
  .article-body h2 { font-size: 24px; }
  .article-body p,
  .article-body li { font-size: 16.5px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,
  *::before,
  *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
}