:root {
  color-scheme: light;
  --ink: #0f172a;
  --muted: #607089;
  --line: #dce4ee;
  --surface: #ffffff;
  --canvas: #f3f7fb;
  --blue: #1d6fff;
  --blue-dark: #154fae;
  --mint: #58c9a0;
  --gold: #e7a83c;
  --shell: 1200px;
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  line-height: 1.75;
  letter-spacing: 0;
}

img {
  display: block;
  max-width: 100%;
}

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

.shell {
  width: min(var(--shell), calc(100% - 40px));
  margin-inline: auto;
}

.utility-bar {
  color: #dce5f3;
  background: #111827;
  font-size: 12px;
}

.utility-bar .shell {
  min-height: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.utility-bar a:hover {
  color: #fff;
}

.solution-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid rgba(220, 228, 238, 0.92);
  backdrop-filter: blur(14px);
}

.solution-header__inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.solution-brand {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 11px;
}

.solution-brand img {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.solution-brand span {
  display: grid;
  gap: 1px;
}

.solution-brand strong {
  font-size: 18px;
  line-height: 1.4;
}

.solution-brand small {
  color: var(--muted);
  font-size: 11px;
}

.solution-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.solution-nav a:hover,
.solution-nav a[aria-current="page"] {
  color: var(--blue);
}

.solution-nav__cta {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 0 16px;
  color: #fff !important;
  background: var(--blue);
  border-radius: 7px;
  box-shadow: 0 8px 20px rgba(29, 111, 255, 0.2);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--blue-dark);
  font-size: 13px;
  font-weight: 800;
}

.hub-intro,
.guide-hero {
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.hub-intro__inner {
  min-height: 610px;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(440px, 1.05fr);
  align-items: center;
  gap: 64px;
  padding-block: 72px;
}

.hub-intro h1,
.guide-hero h1 {
  margin: 0;
  font-size: 52px;
  line-height: 1.2;
  letter-spacing: 0;
}

.hub-intro__inner > div > p:not(.eyebrow),
.guide-hero__grid > div > p:not(.eyebrow) {
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.9;
}

.hub-intro figure,
.guide-hero figure {
  margin: 0;
}

.hub-intro figure img,
.guide-hero figure img {
  width: 100%;
  object-fit: contain;
  background: #f7f9fc;
  border-radius: 8px;
}

.hub-intro figure img {
  height: auto;
  aspect-ratio: 16 / 9;
  background: #fff;
}

.guide-hero figure img {
  aspect-ratio: 4 / 3;
}

.hub-intro figcaption,
.guide-hero figcaption {
  margin-top: 10px;
  color: #8793a5;
  font-size: 12px;
  text-align: center;
}

.hub-intro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.primary-link,
.secondary-link {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border-radius: 7px;
  font-size: 14px;
  font-weight: 800;
}

.primary-link {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 10px 26px rgba(29, 111, 255, 0.22);
}

.secondary-link {
  color: var(--blue-dark);
  background: #fff;
  border: 1px solid #bcd0ee;
}

.hub-answer,
.direct-answer {
  color: #fff;
  background: #14233e;
}

.hub-answer .shell,
.direct-answer .shell {
  min-height: 144px;
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  align-items: center;
  gap: 38px;
  padding-block: 28px;
}

.hub-answer span,
.direct-answer strong {
  color: var(--mint);
  font-size: 14px;
}

.hub-answer p,
.direct-answer p {
  margin: 0;
  font-size: 21px;
  line-height: 1.7;
}

.hub-topics {
  padding-block: 92px;
}

.hub-topics > header {
  max-width: 760px;
  margin-bottom: 38px;
}

.hub-topics h2,
.related-guides h2 {
  margin: 0;
  font-size: 38px;
  line-height: 1.35;
  letter-spacing: 0;
}

.hub-topics > header > p:last-child {
  margin: 14px 0 0;
  color: var(--muted);
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.solution-card {
  min-width: 0;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.solution-card:hover {
  transform: translateY(-4px);
  border-color: #a7c2ea;
  box-shadow: 0 18px 38px rgba(23, 42, 70, 0.1);
}

.solution-card__media {
  display: block;
  height: 188px;
  overflow: hidden;
  background: #eef3f9;
}

.solution-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.solution-card__body {
  padding: 24px;
}

.solution-card__body > span {
  color: var(--blue-dark);
  font-size: 11px;
  font-weight: 800;
}

.solution-card h2 {
  margin: 9px 0 10px;
  font-size: 22px;
  line-height: 1.45;
}

.solution-card p {
  min-height: 88px;
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.text-link {
  color: var(--blue-dark);
  font-size: 13px;
  font-weight: 800;
}

.text-link span {
  display: inline-block;
  transition: transform 0.2s ease;
}

.text-link:hover span {
  transform: translateX(4px);
}

.evidence-band {
  padding-block: 54px;
  background: #fff;
  border-block: 1px solid var(--line);
}

.evidence-band__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.evidence-band__grid > div {
  padding: 12px 34px;
  border-right: 1px solid var(--line);
}

.evidence-band__grid > div:first-child {
  padding-left: 0;
}

.evidence-band__grid > div:last-child {
  padding-right: 0;
  border-right: 0;
}

.evidence-band span {
  display: block;
  color: var(--gold);
  font-size: 14px;
  font-weight: 800;
}

.evidence-band strong {
  display: block;
  margin-top: 6px;
  font-size: 20px;
}

.evidence-band p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.guide-hero {
  padding: 28px 0 64px;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-bottom: 34px;
  color: #7b889a;
  font-size: 12px;
}

.breadcrumbs a:hover {
  color: var(--blue);
}

.guide-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(400px, 0.95fr);
  align-items: center;
  gap: 60px;
}

.guide-hero h1 {
  font-size: 45px;
}

.guide-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 26px;
  color: #7d899a;
  font-size: 12px;
}

.fact-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 34px;
  padding: 28px 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.fact-strip > div {
  display: grid;
  gap: 5px;
  padding-inline: 34px;
  border-right: 1px solid var(--line);
}

.fact-strip > div:last-child {
  border-right: 0;
}

.fact-strip strong {
  color: var(--blue);
  font-size: 24px;
}

.fact-strip span {
  color: var(--muted);
  font-size: 13px;
}

.guide-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  align-items: start;
  gap: 54px;
  padding-block: 62px 86px;
}

.guide-body {
  min-width: 0;
}

.guide-outline {
  display: grid;
  grid-template-columns: 118px minmax(0, 1fr);
  gap: 28px;
  margin-bottom: 54px;
  padding: 28px;
  background: #eef4fb;
  border-left: 4px solid var(--blue);
  border-radius: 0 8px 8px 0;
}

.guide-outline > strong {
  font-size: 15px;
}

.guide-outline ol {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.guide-outline a {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  color: #43536a;
  font-size: 14px;
}

.guide-outline a span {
  color: var(--blue);
  font-weight: 800;
}

.guide-outline a:hover {
  color: var(--blue-dark);
}

.guide-body > section {
  scroll-margin-top: 102px;
  margin-top: 54px;
}

.guide-body > section:first-of-type {
  margin-top: 0;
}

.guide-body h2,
.platform-matrix h2 {
  margin: 0 0 18px;
  font-size: 29px;
  line-height: 1.45;
  letter-spacing: 0;
}

.guide-body p,
.platform-matrix > p {
  margin: 0 0 18px;
  color: #40516a;
  font-size: 16px;
  line-height: 2;
}

.guide-body ul {
  display: grid;
  gap: 11px;
  margin: 22px 0;
  padding: 22px 26px;
  color: #40516a;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  list-style: none;
}

.guide-body li {
  position: relative;
  padding-left: 20px;
}

.guide-body li::before {
  position: absolute;
  top: 0.78em;
  left: 0;
  width: 7px;
  height: 7px;
  content: '';
  background: var(--mint);
  border-radius: 50%;
}

.guide-sidebar {
  position: sticky;
  top: 96px;
  display: grid;
  gap: 16px;
}

.guide-sidebar > div {
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.guide-sidebar > div > span {
  display: block;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.guide-sidebar em {
  display: inline-block;
  margin: 0 5px 7px 0;
  padding: 4px 8px;
  color: #49617e;
  background: #eef4fb;
  border-radius: 4px;
  font-size: 11px;
  font-style: normal;
}

.guide-sidebar__cta {
  border-top: 3px solid var(--mint) !important;
}

.guide-sidebar__cta strong {
  display: block;
  font-size: 17px;
  line-height: 1.55;
}

.guide-sidebar__cta p {
  margin: 10px 0 16px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.75;
}

.guide-sidebar__cta a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  color: #fff;
  background: var(--blue);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 800;
}

.platform-matrix {
  margin-bottom: 54px;
  padding: 30px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.platform-matrix__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 24px;
}

.platform-matrix__grid > div {
  min-width: 0;
  min-height: 96px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 7px;
  padding: 10px;
  background: #f7f9fc;
  border: 1px solid #e8edf4;
  border-radius: 6px;
}

.platform-matrix__grid img {
  width: 48px;
  height: 48px;
  object-fit: contain;
}

.platform-matrix__grid span {
  max-width: 100%;
  color: #4c5c72;
  font-size: 11px;
  text-align: center;
  overflow-wrap: anywhere;
}

.guide-faq details {
  margin-top: 10px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.guide-faq summary {
  padding: 17px 20px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 800;
}

.guide-faq details p {
  margin: 0;
  padding: 0 20px 18px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.editorial-note {
  margin-top: 46px;
  padding: 24px 26px;
  color: #4b5b70;
  background: #fff9ec;
  border-left: 4px solid var(--gold);
}

.editorial-note p {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.8;
}

.related-guides {
  padding-block: 72px;
  background: #fff;
  border-top: 1px solid var(--line);
}

.related-guides header {
  margin-bottom: 30px;
}

.related-guides__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.solution-footer {
  color: #cad4e2;
  background: #111827;
}

.solution-footer__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 64px;
  padding-block: 50px;
}

.solution-footer strong {
  color: #fff;
  font-size: 18px;
}

.solution-footer p {
  max-width: 520px;
  margin: 12px 0 0;
  color: #9ba9bb;
  font-size: 13px;
}

.solution-footer nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 28px;
  align-content: start;
  font-size: 13px;
}

.solution-footer a:hover {
  color: #fff;
}

.solution-footer__bottom {
  padding-block: 20px;
  color: #7f8da0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 11px;
}

@media (max-width: 960px) {
  .solution-nav a:not(.solution-nav__cta) {
    display: none;
  }

  .hub-intro__inner,
  .guide-hero__grid {
    grid-template-columns: 1fr;
  }

  .hub-intro__inner {
    gap: 38px;
  }

  .hub-intro h1,
  .guide-hero h1 {
    font-size: 42px;
  }

  .solution-grid,
  .related-guides__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .guide-layout {
    grid-template-columns: 1fr;
  }

  .guide-sidebar {
    position: static;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .shell {
    width: min(100% - 28px, var(--shell));
  }

  .utility-bar .shell {
    justify-content: center;
  }

  .utility-bar a {
    display: none;
  }

  .solution-brand small {
    display: none;
  }

  .solution-nav__cta {
    padding-inline: 12px;
  }

  .hub-intro__inner {
    min-height: auto;
    padding-block: 54px;
  }

  .hub-intro h1,
  .guide-hero h1 {
    font-size: 34px;
  }

  .hub-intro__inner > div > p:not(.eyebrow),
  .guide-hero__grid > div > p:not(.eyebrow) {
    font-size: 16px;
  }

  .hub-answer .shell,
  .direct-answer .shell {
    grid-template-columns: 1fr;
    gap: 8px;
    padding-block: 26px;
  }

  .hub-answer p,
  .direct-answer p {
    font-size: 17px;
  }

  .hub-topics {
    padding-block: 62px;
  }

  .hub-topics h2,
  .related-guides h2 {
    font-size: 30px;
  }

  .solution-grid,
  .related-guides__grid,
  .evidence-band__grid,
  .fact-strip,
  .solution-footer__grid {
    grid-template-columns: 1fr;
  }

  .solution-card p {
    min-height: 0;
  }

  .evidence-band__grid > div,
  .evidence-band__grid > div:first-child,
  .evidence-band__grid > div:last-child {
    padding: 22px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .evidence-band__grid > div:last-child {
    border-bottom: 0;
  }

  .guide-hero {
    padding-bottom: 42px;
  }

  .guide-hero__grid {
    gap: 34px;
  }

  .fact-strip > div {
    padding: 20px 24px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .fact-strip > div:last-child {
    border-bottom: 0;
  }

  .guide-layout {
    gap: 36px;
    padding-block: 46px 64px;
  }

  .guide-outline {
    grid-template-columns: 1fr;
    gap: 14px;
    padding: 22px;
  }

  .guide-body h2,
  .platform-matrix h2 {
    font-size: 25px;
  }

  .guide-body p,
  .platform-matrix > p {
    font-size: 15px;
  }

  .platform-matrix {
    padding: 22px;
  }

  .platform-matrix__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .guide-sidebar,
  .solution-footer__grid {
    grid-template-columns: 1fr;
  }

  .solution-footer nav {
    grid-template-columns: 1fr 1fr;
  }
}

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

  .solution-card,
  .text-link span {
    transition: none;
  }
}