:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #5c677a;
  --line: #d9e1ea;
  --soft: #f5f8fb;
  --brand: #0f766e;
  --brand-2: #2563eb;
  --panel: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--ink);
  background: #ffffff;
  line-height: 1.7;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  font-size: 16px;
}

a {
  color: #075985;
  text-decoration: none;
}

a:hover {
  color: var(--brand);
  text-decoration: underline;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

header nav,
footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  align-items: center;
  max-width: 1160px;
  margin: 0 auto;
  padding: 14px 20px;
}

header nav a:first-child {
  margin-right: auto;
  color: var(--ink);
  font-weight: 800;
  font-size: 18px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  max-width: 420px;
  line-height: 1.25;
}

.brand-cn,
.brand-en {
  display: block;
}

.brand-cn {
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}

.brand-en {
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  word-break: break-word;
}

main {
  max-width: 1160px;
  margin: 0 auto;
  padding: 42px 20px 56px;
}

main > h1:first-child {
  max-width: 920px;
  margin: 0 0 16px;
  font-size: clamp(30px, 5vw, 54px);
  line-height: 1.15;
  letter-spacing: 0;
}

main > p:first-of-type {
  max-width: 880px;
  color: var(--muted);
  font-size: 18px;
}

h2 {
  margin: 40px 0 14px;
  padding-top: 6px;
  font-size: 26px;
  line-height: 1.3;
  letter-spacing: 0;
}

h3 {
  margin: 18px 0 8px;
  font-size: 20px;
  line-height: 1.35;
}

h4 {
  margin: 16px 0 6px;
  font-size: 17px;
}

p,
li {
  color: var(--muted);
}

ul,
ol {
  padding-left: 22px;
}

section {
  margin: 34px 0;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  background: var(--soft);
}

div:has(> img) {
  overflow: hidden;
}

main > div,
main section > div {
  min-width: 0;
}

main > div:has(> img),
main section > div:has(> img) {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

main > div:has(> img) img,
main section > div:has(> img) img {
  width: 100%;
  object-fit: cover;
}

main > div:has(> img[width="48"]),
main > div:has(> img[width="60"]),
main section > div:has(> img[width="48"]),
main section > div:has(> img[width="60"]),
main section > div:has(> img[width="80"]) {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

main > div:has(> img[width="48"]) img,
main > div:has(> img[width="60"]) img,
main section > div:has(> img[width="48"]) img,
main section > div:has(> img[width="60"]) img,
main section > div:has(> img[width="80"]) img {
  flex: 0 0 auto;
  width: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
}

th,
td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--soft);
  color: var(--ink);
}

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

main > a,
section > a,
p > a[href^="tel:"],
p > a[href^="mailto:"] {
  font-weight: 700;
}

footer {
  border-top: 1px solid var(--line);
  background: #0f172a;
  color: #e5edf7;
}

footer > div {
  max-width: 1160px;
  margin: 0 auto;
  padding: 22px 20px 0;
}

footer p,
footer h4 {
  color: #e5edf7;
}

footer h4 .brand-cn {
  color: #e5edf7;
  font-size: 18px;
}

footer h4 .brand-en {
  color: #b9c7d8;
  font-size: 12px;
}

footer a {
  color: #a7f3d0;
}

@media (min-width: 720px) {
  main section,
  main > div:has(> img) + div:has(> img) {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  main section > h2,
  main section > h3,
  main section > p,
  main section > ul,
  main section > table {
    grid-column: 1 / -1;
  }
}

@media (max-width: 719px) {
  header nav {
    gap: 8px 12px;
    padding: 12px 14px;
  }

  header nav a:first-child {
    flex-basis: 100%;
    max-width: none;
  }

  main {
    padding: 30px 14px 42px;
  }

  table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}


.topic-hero {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(15, 118, 110, 0.08), rgba(37, 99, 235, 0.06)),
    #ffffff;
}

.topic-eyebrow {
  margin: 0 0 10px;
  color: var(--brand);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0;
}

.topic-hero h1 {
  margin: 0 0 14px;
}

.topic-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.topic-cta-primary,
.topic-cta-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 6px;
  font-weight: 700;
  text-decoration: none;
}

.topic-cta-primary {
  background: var(--brand);
  color: #ffffff;
}

.topic-cta-secondary {
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--ink);
}

.topic-overview,
.topic-contact {
  margin-top: 28px;
}

.topic-card-grid,
.topic-contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.topic-card-grid > div,
.topic-contact-grid > div {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.topic-contact-grid h3,
.topic-card-grid h3 {
  margin-top: 0;
}