:root {
  --ink: #12344d;
  --ink-soft: #47657a;
  --sky-50: #f4fbff;
  --sky-100: #e8f6fc;
  --sky-200: #cceaf6;
  --sky-400: #5dbce2;
  --sky-600: #167cad;
  --teal: #11877d;
  --teal-soft: #dff4ef;
  --amber: #d99522;
  --amber-soft: #fff2cf;
  --coral: #d8664d;
  --green: #3f8e67;
  --violet: #6f73b9;
  --paper: #ffffff;
  --line: #d9e8ef;
  --shadow: 0 14px 40px rgba(25, 73, 100, 0.12);
  --content: 1180px;
  --radius: 6px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0;
}

body,
button,
a {
  -webkit-font-smoothing: antialiased;
}

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

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

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

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

h1,
h2,
h3 {
  line-height: 1.25;
  letter-spacing: 0;
}

h1 {
  font-size: 64px;
}

h2 {
  margin-bottom: 18px;
  font-size: 36px;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

p {
  color: var(--ink-soft);
}

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

.content-width {
  width: min(calc(100% - 48px), var(--content));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  min-height: 68px;
  border-bottom: 1px solid rgba(18, 52, 77, 0.1);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
}

.header-inner {
  display: flex;
  width: min(calc(100% - 40px), 1240px);
  min-height: 68px;
  margin-inline: auto;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 4px;
  color: #fff;
  background: var(--sky-600);
  font-size: 21px;
  font-weight: 800;
}

.brand > span:last-child {
  display: grid;
}

.brand strong {
  font-size: 17px;
  line-height: 1.25;
}

.brand small {
  color: #7890a1;
  font-size: 11px;
}

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

.site-nav a {
  padding: 9px 12px;
  color: #35566d;
  font-size: 14px;
  font-weight: 650;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--sky-600);
}

.site-nav .nav-cta {
  margin-left: 5px;
  border: 1px solid var(--sky-600);
  border-radius: 4px;
  color: var(--sky-600);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px;
  border: 0;
  background: transparent;
}

.menu-toggle span:not(.sr-only) {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--ink);
}

.home-hero {
  position: relative;
  display: flex;
  height: min(720px, calc(100vh - 92px));
  min-height: 590px;
  align-items: center;
  overflow: hidden;
  background: #dff1f9;
}

.hero-background {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(239, 249, 253, 0.66);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding-right: min(48%, 560px);
}

.kicker {
  margin-bottom: 12px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.home-hero h1 {
  margin-bottom: 16px;
  color: #0d324e;
  font-size: 72px;
}

.hero-positioning {
  max-width: 680px;
  margin-bottom: 14px;
  color: var(--ink);
  font-size: 25px;
  font-weight: 700;
  line-height: 1.55;
}

.hero-support {
  max-width: 650px;
  margin-bottom: 30px;
  color: #3f6177;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 34px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  padding: 11px 18px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid transparent;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 800;
}

.button-primary {
  color: #fff;
  border-color: var(--sky-600);
  background: var(--sky-600);
}

.button-primary:hover,
.button-primary:focus-visible {
  border-color: #0d6793;
  background: #0d6793;
}

.button-secondary {
  color: var(--ink);
  border-color: rgba(18, 52, 77, 0.28);
  background: rgba(255, 255, 255, 0.72);
}

.trust-line {
  display: flex;
  gap: 0;
  padding: 0;
  margin: 0;
  color: #274f67;
  list-style: none;
  font-size: 14px;
  font-weight: 700;
}

.trust-line li {
  padding: 0 18px;
  border-left: 1px solid rgba(18, 52, 77, 0.22);
}

.trust-line li:first-child {
  padding-left: 0;
  border-left: 0;
}

.next-section {
  position: absolute;
  z-index: 2;
  right: 28px;
  bottom: 24px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #315b72;
  font-size: 12px;
  font-weight: 800;
}

.section {
  padding: 92px 0;
}

.section-intro {
  display: grid;
  margin-bottom: 36px;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: 48px;
  align-items: end;
}

.section-intro.narrow {
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.55fr);
}

.section-intro h2 {
  max-width: 800px;
  margin-bottom: 0;
}

.section-intro > p {
  margin-bottom: 2px;
}

.weekly-section {
  background: var(--paper);
}

.feature-topic {
  display: grid;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fafdff;
  box-shadow: var(--shadow);
  grid-template-columns: minmax(0, 1.2fr) minmax(360px, 0.8fr);
}

.feature-image {
  position: relative;
  min-height: 430px;
  overflow: hidden;
}

.feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 260ms ease;
}

.feature-image:hover img {
  transform: scale(1.015);
}

.image-badge {
  position: absolute;
  left: 18px;
  bottom: 18px;
  padding: 7px 10px;
  border-radius: 3px;
  color: #fff;
  background: rgba(18, 52, 77, 0.86);
  font-size: 12px;
  font-weight: 800;
}

.feature-copy {
  display: flex;
  padding: 40px;
  flex-direction: column;
  justify-content: center;
}

.feature-verdict {
  margin-bottom: 26px;
  color: var(--ink);
  font-size: 24px;
  font-weight: 800;
}

.evidence-points {
  padding: 0;
  margin: 0 0 28px;
  list-style: none;
}

.evidence-points li {
  display: grid;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 72px 1fr;
  gap: 12px;
}

.evidence-points strong {
  color: var(--sky-600);
}

.evidence-points span {
  color: var(--ink-soft);
}

.feature-actions {
  display: grid;
  gap: 8px;
}

.feature-actions > span {
  color: #6d8392;
  font-size: 12px;
}

.text-link {
  color: var(--sky-600);
  font-weight: 800;
}

.related-topics {
  display: grid;
  margin-top: 20px;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.related-topics article {
  display: grid;
  min-height: 188px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  grid-template-columns: 190px 1fr;
}

.related-topic-card {
  display: grid;
  min-height: 188px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  grid-template-columns: 190px 1fr;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.related-topic-card:hover,
.related-reading-card:hover {
  border-color: var(--sky-400);
  box-shadow: 0 12px 28px rgba(31, 92, 119, 0.1);
  transform: translateY(-2px);
}

.related-topics img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.related-topics article > div,
.related-topic-card > div {
  padding: 24px;
}

.related-topics span,
.update-list span,
.related-reading span {
  color: var(--teal);
  font-size: 12px;
  font-weight: 800;
}

.related-topics h3 {
  margin: 6px 0 8px;
}

.related-topics p {
  margin: 0;
  font-size: 14px;
}

.problem-section {
  background: #f2f9fc;
}

.problem-grid {
  display: grid;
  border-top: 1px solid #bddce8;
  border-left: 1px solid #bddce8;
  grid-template-columns: repeat(3, 1fr);
}

.problem-item {
  display: flex;
  min-height: 270px;
  padding: 26px 22px;
  flex-direction: column;
  border-right: 1px solid #bddce8;
  border-bottom: 1px solid #bddce8;
  background: rgba(255, 255, 255, 0.58);
}

.problem-item.is-active {
  background: var(--paper);
}

.problem-item.is-active:hover {
  box-shadow: inset 0 -4px 0 var(--sky-600);
}

.problem-number {
  margin-bottom: auto;
  color: var(--sky-600);
  font-size: 13px;
  font-weight: 900;
}

.problem-item h3 {
  margin-top: 30px;
}

.problem-item p {
  margin-bottom: 18px;
  font-size: 14px;
}

.problem-route {
  color: var(--sky-600);
  font-size: 13px;
  font-weight: 800;
}

.editorial-note {
  margin-top: auto;
  color: #6c8494;
  font-size: 12px;
}

.knowledge-section {
  background: var(--paper);
}

.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.knowledge-item {
  position: relative;
  min-height: 310px;
  padding: 28px 24px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.knowledge-item::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 4px;
  background: var(--accent);
  content: "";
}

.knowledge-item > span {
  display: block;
  margin-bottom: 30px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 900;
}

.knowledge-item p {
  min-height: 76px;
  margin-bottom: 18px;
  font-size: 14px;
}

.knowledge-item ul {
  padding: 16px 0 0;
  margin: 0;
  border-top: 1px solid var(--line);
  color: #456276;
  list-style: none;
  font-size: 13px;
}

.knowledge-item li + li {
  margin-top: 8px;
}

.accent-teal { --accent: var(--teal); }
.accent-blue { --accent: var(--sky-600); }
.accent-orange { --accent: var(--coral); }
.accent-green { --accent: var(--green); }
.accent-yellow { --accent: var(--amber); }
.accent-violet { --accent: var(--violet); }
.accent-red { --accent: #bd5362; }
.accent-slate { --accent: #60798a; }

.smart-section {
  background: #eaf7f4;
}

.smart-layout {
  display: grid;
  grid-template-columns: minmax(360px, 0.82fr) minmax(0, 1.18fr);
  gap: 56px;
  align-items: center;
}

.smart-copy > p:not(.kicker) {
  margin-bottom: 28px;
}

.smart-matrix {
  border-top: 1px solid rgba(17, 135, 125, 0.25);
}

.smart-matrix div {
  display: grid;
  padding: 14px 0;
  border-bottom: 1px solid rgba(17, 135, 125, 0.25);
  grid-template-columns: 92px 1fr;
  gap: 16px;
}

.smart-matrix strong {
  color: var(--teal);
}

.smart-matrix span {
  color: #436a68;
}

.smart-figure {
  margin: 0;
}

.smart-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid rgba(17, 135, 125, 0.22);
  object-fit: cover;
}

.smart-figure figcaption {
  padding-top: 10px;
  color: #587a78;
  font-size: 12px;
}

.tools-section {
  background: var(--paper);
}

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

.tool-row {
  display: grid;
  min-height: 94px;
  padding: 18px 0;
  align-items: center;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 100px 1fr auto;
  gap: 24px;
}

.tool-code {
  color: var(--sky-600);
  font-size: 12px;
  font-weight: 900;
}

.tool-row > div {
  display: grid;
  gap: 3px;
}

.tool-row > div span {
  color: #6b8291;
  font-size: 13px;
}

.tool-row button,
.keyword-cloud button {
  min-height: 38px;
  padding: 8px 13px;
  border: 1px solid #b7d8e5;
  border-radius: 4px;
  color: var(--sky-600);
  background: #f5fbfd;
  cursor: pointer;
  font-size: 13px;
  font-weight: 800;
}

.tool-row button:hover,
.keyword-cloud button:hover {
  border-color: var(--sky-600);
  background: #e9f6fb;
}

.updates-section {
  background: #f7fafb;
}

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

.update-list article {
  display: grid;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 150px 1fr;
  gap: 30px;
}

.update-list time {
  color: #6c8291;
  font-size: 13px;
}

.update-list h3 {
  margin: 5px 0 0;
  font-size: 18px;
}

.update-list a:hover {
  color: var(--sky-600);
}

.profile-section {
  background: var(--paper);
}

.profile-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(420px, 1.18fr);
  gap: 70px;
  align-items: start;
}

.profile-copy > p {
  margin-bottom: 28px;
  font-size: 18px;
}

.profile-copy dl {
  margin: 0;
}

.profile-copy dl > div {
  display: grid;
  padding: 15px 0;
  border-top: 1px solid var(--line);
  grid-template-columns: 110px 1fr;
}

.profile-copy dt {
  color: var(--sky-600);
  font-weight: 800;
}

.profile-copy dd {
  margin: 0;
  color: var(--ink-soft);
}

.wechat-section {
  padding: 72px 0;
  color: #fff;
  background: #176f8e;
}

.wechat-section .kicker,
.wechat-section p {
  color: rgba(255, 255, 255, 0.78);
}

.wechat-section h2 {
  color: #fff;
}

.wechat-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 70px;
  align-items: center;
}

.keyword-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: flex-end;
}

.keyword-cloud button {
  border-color: rgba(255, 255, 255, 0.42);
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.keyword-cloud button:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.16);
}

.site-footer {
  padding: 30px 0;
  background: #eef6f8;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.footer-inner > div {
  display: grid;
}

.footer-inner span {
  color: #6d8594;
  font-size: 12px;
}

.footer-inner p {
  max-width: 680px;
  margin: 0;
  font-size: 12px;
  text-align: right;
}

.footer-meta {
  justify-items: end;
  gap: 6px;
}

.icp-link {
  color: #375f78;
  font-size: 12px;
  text-decoration: none;
}

.icp-link:hover {
  color: #0d6fa8;
  text-decoration: underline;
}

.toast {
  position: fixed;
  z-index: 200;
  right: 24px;
  bottom: 24px;
  max-width: calc(100% - 48px);
  padding: 11px 15px;
  border-radius: 4px;
  color: #fff;
  background: rgba(18, 52, 77, 0.94);
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: 180ms ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Article page */

.article-hero {
  position: relative;
  display: flex;
  min-height: 520px;
  align-items: flex-end;
  overflow: hidden;
  background: #d7eef8;
}

.article-hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.article-hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(237, 248, 252, 0.72);
}

.article-hero-content {
  position: relative;
  z-index: 1;
  padding: 76px 0 58px;
}

.breadcrumb {
  display: inline-block;
  margin-bottom: 34px;
  color: #476a7f;
  font-size: 12px;
  font-weight: 700;
}

.article-hero h1 {
  max-width: 900px;
  margin-bottom: 18px;
  color: var(--ink);
  font-size: 54px;
}

.article-hero-content > p:not(.kicker) {
  max-width: 760px;
  margin-bottom: 26px;
  color: #335b72;
  font-size: 19px;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  color: #557488;
  font-size: 12px;
  font-weight: 700;
}

.verdict-band {
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.verdict-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.verdict-grid > div {
  display: grid;
  min-height: 112px;
  padding: 22px 28px;
  align-content: center;
  border-right: 1px solid var(--line);
  gap: 5px;
}

.verdict-grid > div:first-child {
  border-left: 1px solid var(--line);
}

.verdict-grid span {
  color: var(--sky-600);
  font-size: 12px;
  font-weight: 800;
}

.verdict-grid strong {
  font-size: 17px;
}

.article-layout {
  display: grid;
  padding-top: 64px;
  padding-bottom: 100px;
  grid-template-columns: 200px minmax(0, 820px);
  gap: 68px;
  justify-content: center;
  align-items: start;
}

.article-toc {
  position: sticky;
  top: 96px;
  display: grid;
  border-top: 2px solid var(--sky-600);
}

.article-toc > span {
  padding: 14px 8px 10px;
  color: #7890a1;
  font-size: 11px;
  font-weight: 800;
}

.article-toc a {
  padding: 7px 8px;
  border-left: 2px solid transparent;
  color: #5e7788;
  font-size: 13px;
}

.article-toc a:hover,
.article-toc a.is-current {
  border-left-color: var(--sky-600);
  color: var(--sky-600);
}

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

.article-section {
  padding: 8px 0 64px;
  scroll-margin-top: 92px;
}

.article-section + .article-section {
  padding-top: 56px;
  border-top: 1px solid var(--line);
}

.section-label {
  margin-bottom: 10px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 900;
}

.article-body h2 {
  font-size: 32px;
}

.article-body .lead {
  margin-bottom: 28px;
  color: #385d72;
  font-size: 18px;
  line-height: 1.9;
}

.judgment-box {
  padding: 26px 28px;
  border-left: 4px solid var(--sky-600);
  background: var(--sky-50);
}

.judgment-box > strong {
  display: block;
  margin-bottom: 8px;
  color: var(--sky-600);
  font-size: 13px;
}

.judgment-box p {
  margin-bottom: 5px;
  color: var(--ink);
  font-size: 19px;
  font-weight: 800;
}

.judgment-box small {
  color: #6a8291;
}

.two-column-text {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.two-column-text > div {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.check-list {
  padding: 0;
  margin: 0;
  color: #496778;
  list-style: none;
}

.check-list li {
  position: relative;
  padding: 9px 0 9px 20px;
  border-bottom: 1px solid #e7eff3;
}

.check-list li::before {
  position: absolute;
  top: 18px;
  left: 0;
  width: 7px;
  height: 7px;
  background: var(--teal);
  content: "";
}

.check-list.warning li::before {
  background: var(--amber);
}

.annotated-figure {
  position: relative;
  margin: 24px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--sky-50);
}

.annotated-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.annotated-figure figcaption {
  padding: 10px 14px;
  color: #627c8c;
  background: #f8fbfc;
  font-size: 11px;
}

.callout {
  position: absolute;
  display: inline-flex;
  padding: 6px 9px;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(18, 52, 77, 0.2);
  border-radius: 3px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 6px 18px rgba(18, 52, 77, 0.14);
  font-size: 12px;
  font-weight: 800;
}

.callout b {
  display: grid;
  width: 20px;
  height: 20px;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--coral);
  font-size: 11px;
}

.callout-one {
  bottom: 16%;
  left: 26%;
}

.callout-two {
  top: 41%;
  left: 47%;
}

.callout-three {
  top: 27%;
  right: 8%;
}

.blind-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.blind-grid article {
  min-height: 180px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.blind-grid span {
  color: var(--coral);
  font-size: 12px;
  font-weight: 900;
}

.blind-grid h3 {
  margin-top: 22px;
}

.blind-grid p {
  margin: 0;
  font-size: 14px;
}

.route-flow {
  position: relative;
  padding: 0;
  margin: 30px 0 0;
  list-style: none;
}

.route-flow::before {
  position: absolute;
  top: 20px;
  bottom: 20px;
  left: 24px;
  width: 1px;
  background: #abd4e4;
  content: "";
}

.route-flow li {
  position: relative;
  display: grid;
  min-height: 92px;
  padding-bottom: 22px;
  grid-template-columns: 50px 1fr;
  gap: 22px;
}

.route-flow li > span {
  position: relative;
  z-index: 1;
  display: grid;
  width: 50px;
  height: 50px;
  place-items: center;
  border: 1px solid var(--sky-400);
  border-radius: 50%;
  color: var(--sky-600);
  background: #fff;
  font-size: 12px;
  font-weight: 900;
}

.route-flow li > div {
  padding: 6px 0 18px;
  border-bottom: 1px solid var(--line);
}

.route-flow strong {
  display: block;
  margin-bottom: 4px;
  font-size: 18px;
}

.route-flow p {
  margin: 0;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
  font-size: 13px;
}

th,
td {
  padding: 14px 15px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th:last-child,
td:last-child {
  border-right: 0;
}

tr:last-child td {
  border-bottom: 0;
}

th {
  color: var(--ink);
  background: #eff8fb;
  font-weight: 800;
}

td {
  color: #486778;
}

.action-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.action-grid article {
  min-height: 290px;
  padding: 24px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--action-color);
  border-radius: var(--radius);
}

.action-grid article > span {
  color: var(--action-color);
  font-size: 12px;
  font-weight: 900;
}

.action-grid h3 {
  margin-top: 20px;
}

.action-grid ul {
  padding-left: 19px;
  margin: 20px 0 0;
  color: #4d6a7b;
  font-size: 14px;
}

.action-grid li + li {
  margin-top: 10px;
}

.action-immediate { --action-color: var(--coral); }
.action-deadline { --action-color: var(--amber); }
.action-system { --action-color: var(--teal); }

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

.verification-list > div {
  display: grid;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 54px 1fr;
  gap: 14px;
}

.verification-list b {
  color: var(--sky-600);
}

.verification-list span {
  color: #4b6879;
}

.verification-list strong {
  display: inline-block;
  min-width: 118px;
  color: var(--ink);
}

.responsibility-table th:first-child,
.responsibility-table td:first-child {
  width: 126px;
}

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

.source-list article {
  display: grid;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
}

.source-list span {
  color: var(--teal);
  font-size: 11px;
  font-weight: 900;
}

.source-list h3 {
  margin: 6px 0;
  font-size: 18px;
}

.source-list p {
  margin: 0;
  font-size: 14px;
}

.source-list a {
  color: var(--sky-600);
  font-size: 13px;
  font-weight: 800;
}

.source-note {
  padding: 18px 20px;
  margin-top: 20px;
  border-left: 3px solid var(--amber);
  background: var(--amber-soft);
  font-size: 13px;
}

.tool-cta {
  display: grid;
  padding: 36px;
  margin: 16px 0 72px;
  border-radius: var(--radius);
  color: #fff;
  background: #176f8e;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
  scroll-margin-top: 92px;
}

.tool-cta .kicker,
.tool-cta p,
.tool-cta-action > span {
  color: rgba(255, 255, 255, 0.78);
}

.tool-cta h2 {
  color: #fff;
}

.tool-cta p {
  margin: 0;
}

.tool-cta-action {
  display: grid;
  gap: 12px;
  justify-items: end;
}

.tool-cta-action > span {
  font-size: 12px;
}

.tool-cta .button-primary {
  color: var(--ink);
  border-color: #fff;
  background: #fff;
}

.related-reading-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.related-reading-grid article {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.related-reading-card {
  display: block;
  min-height: 190px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.related-reading-card b {
  display: inline-block;
  margin-top: 14px;
  color: var(--sky-600);
  font-size: 13px;
}

.related-reading-grid h3 {
  margin-top: 8px;
}

.related-reading-grid p {
  margin-bottom: 0;
  font-size: 14px;
}

@media (max-width: 1060px) {
  .site-nav {
    gap: 0;
  }

  .site-nav a {
    padding-inline: 9px;
  }

  .hero-content {
    padding-right: 34%;
  }

  .home-hero h1 {
    font-size: 62px;
  }

  .problem-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .knowledge-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .article-layout {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 40px;
  }
}

@media (max-width: 820px) {
  h2 {
    font-size: 30px;
  }

  .site-header,
  .header-inner {
    min-height: 62px;
  }

  .menu-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 62px;
    right: 0;
    left: 0;
    display: none;
    padding: 10px 20px 18px;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 18px 30px rgba(25, 73, 100, 0.12);
  }

  .site-nav.is-open {
    display: grid;
  }

  .site-nav a {
    padding: 11px 6px;
    border-bottom: 1px solid #edf3f6;
  }

  .site-nav .nav-cta {
    margin: 8px 0 0;
    border: 0;
  }

  .home-hero {
    height: 680px;
    min-height: 0;
    align-items: flex-end;
  }

  .hero-background {
    object-position: 64% center;
  }

  .hero-overlay {
    background: rgba(240, 249, 253, 0.74);
  }

  .hero-content {
    padding: 0 0 74px;
  }

  .home-hero h1 {
    font-size: 54px;
  }

  .hero-positioning {
    font-size: 21px;
  }

  .section {
    padding: 72px 0;
  }

  .section-intro,
  .section-intro.narrow,
  .profile-layout,
  .wechat-layout {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .feature-topic {
    grid-template-columns: 1fr;
  }

  .feature-image {
    min-height: 340px;
  }

  .related-topics {
    grid-template-columns: 1fr;
  }

  .smart-layout {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .keyword-cloud {
    justify-content: flex-start;
  }

  .article-hero {
    min-height: 500px;
  }

  .article-hero h1 {
    font-size: 44px;
  }

  .article-layout {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .article-toc {
    position: static;
    display: flex;
    overflow-x: auto;
    padding-bottom: 8px;
    border-top: 0;
    border-bottom: 1px solid var(--line);
    gap: 4px;
  }

  .article-toc > span {
    display: none;
  }

  .article-toc a {
    flex: 0 0 auto;
    border: 0;
    border-bottom: 2px solid transparent;
  }

  .article-toc a.is-current {
    border-bottom-color: var(--sky-600);
    border-left-color: transparent;
  }

  .article-layout {
    padding-top: 32px;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .content-width {
    width: min(calc(100% - 30px), var(--content));
  }

  .header-inner {
    width: calc(100% - 28px);
  }

  .brand small {
    display: none;
  }

  .home-hero {
    height: 640px;
  }

  .hero-background {
    object-position: 68% center;
  }

  .hero-overlay {
    background: rgba(239, 248, 252, 0.8);
  }

  .home-hero h1 {
    font-size: 44px;
  }

  .hero-positioning {
    font-size: 19px;
  }

  .hero-support {
    font-size: 15px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .trust-line {
    flex-wrap: wrap;
    gap: 8px 12px;
  }

  .trust-line li,
  .trust-line li:first-child {
    padding: 0;
    border: 0;
  }

  .next-section {
    right: 15px;
    bottom: 14px;
  }

  .section {
    padding: 60px 0;
  }

  .section-intro {
    margin-bottom: 26px;
  }

  .section-intro h2,
  .article-body h2 {
    font-size: 27px;
  }

  .feature-image {
    min-height: 250px;
  }

  .feature-copy {
    padding: 26px 20px;
  }

  .feature-verdict {
    font-size: 21px;
  }

  .related-topics article,
  .related-topic-card {
    grid-template-columns: 118px 1fr;
  }

  .related-topics article > div,
  .related-topic-card > div {
    padding: 18px;
  }

  .related-topics h3 {
    font-size: 17px;
  }

  .related-topics p {
    display: none;
  }

  .problem-grid,
  .knowledge-grid {
    grid-template-columns: 1fr;
  }

  .problem-item {
    min-height: 220px;
  }

  .knowledge-item {
    min-height: 0;
  }

  .knowledge-item p {
    min-height: 0;
  }

  .smart-matrix div {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .tool-row {
    grid-template-columns: 70px 1fr;
    gap: 12px;
  }

  .tool-row button {
    grid-column: 2;
    justify-self: start;
  }

  .update-list article {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .profile-copy dl > div {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .footer-inner {
    display: grid;
  }

  .footer-inner p {
    text-align: left;
  }

  .footer-meta {
    justify-items: start;
  }

  .article-hero {
    min-height: 550px;
  }

  .article-hero-image {
    object-position: 58% center;
  }

  .article-hero-overlay {
    background: rgba(237, 248, 252, 0.8);
  }

  .article-hero-content {
    padding: 54px 0 42px;
  }

  .breadcrumb {
    margin-bottom: 28px;
  }

  .article-hero h1 {
    font-size: 36px;
  }

  .article-hero-content > p:not(.kicker) {
    font-size: 16px;
  }

  .verdict-grid {
    grid-template-columns: 1fr;
  }

  .verdict-grid > div,
  .verdict-grid > div:first-child {
    min-height: 82px;
    padding: 16px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    border-left: 0;
  }

  .article-layout {
    padding-bottom: 60px;
  }

  .article-section {
    padding-bottom: 50px;
  }

  .article-section + .article-section {
    padding-top: 44px;
  }

  .judgment-box {
    padding: 22px 20px;
  }

  .judgment-box p {
    font-size: 17px;
  }

  .two-column-text,
  .blind-grid,
  .action-grid,
  .related-reading-grid {
    grid-template-columns: 1fr;
  }

  .blind-grid article,
  .action-grid article {
    min-height: 0;
  }

  .callout {
    padding: 4px 6px;
    font-size: 10px;
  }

  .callout b {
    width: 17px;
    height: 17px;
  }

  .callout-one {
    bottom: 20%;
    left: 10%;
  }

  .callout-two {
    top: 40%;
    left: 38%;
  }

  .callout-three {
    top: 18%;
    right: 3%;
  }

  .source-list article {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .tool-cta {
    padding: 26px 20px;
    grid-template-columns: 1fr;
  }

  .tool-cta-action {
    justify-items: stretch;
  }

  .tool-cta-action > span {
    text-align: left;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}