:root {
  color-scheme: light;
  --bg: #f5f7f3;
  --surface: #ffffff;
  --ink: #202725;
  --muted: #5d6865;
  --line: #ccd5d1;
  --teal: #0e6b63;
  --teal-dark: #084d48;
  --red: #b9463d;
  --yellow: #d79b24;
  --shadow: 0 16px 40px rgba(32, 39, 37, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

a {
  color: var(--teal-dark);
  text-underline-offset: 4px;
}

a:focus-visible {
  outline: 3px solid var(--yellow);
  outline-offset: 4px;
}

.site-header,
main,
footer {
  width: min(1120px, calc(100% - 48px));
  margin-inline: auto;
}

.site-header {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.brand img {
  flex: 0 0 auto;
}

nav {
  display: flex;
  gap: 28px;
}

nav a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

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

.hero {
  min-height: 520px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  align-items: center;
  gap: 72px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--red);
  font-size: 13px;
  font-weight: 800;
}

h1,
h2,
h3,
p {
  letter-spacing: 0;
}

h1 {
  margin: 0;
  font-size: 56px;
  line-height: 1.15;
}

.lead {
  max-width: 680px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 20px;
  line-height: 1.8;
}

.topic-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.topic-list span {
  padding: 5px 9px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

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

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  border: 1px solid var(--teal);
  border-radius: 6px;
  font-weight: 800;
  text-decoration: none;
}

.button.primary {
  background: var(--teal);
  color: #ffffff;
}

.button.primary:hover {
  background: var(--teal-dark);
}

.button.secondary {
  background: transparent;
  color: var(--teal-dark);
}

.hero-mark {
  display: grid;
  width: 240px;
  height: 240px;
  place-items: center;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.review-notice {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 24px;
  padding: 22px 28px;
  border-left: 5px solid var(--yellow);
  background: #fff9e9;
}

.review-notice span {
  color: var(--muted);
}

.content-section,
.process-section {
  padding: 96px 0;
}

.process-section {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  padding-inline: max(24px, calc((100vw - 1120px) / 2));
  background: #e8efec;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 44px;
}

.section-heading h2,
.policy-content h2 {
  margin: 0;
  font-size: 34px;
  line-height: 1.35;
}

.section-heading > p:last-child {
  color: var(--muted);
}

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

.feature-grid article,
.channel {
  min-width: 0;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}

.feature-grid article:nth-child(2) {
  border-top-color: var(--red);
}

.feature-grid article:nth-child(3) {
  border-top-color: var(--yellow);
}

.feature-index {
  margin: 0;
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
}

.feature-grid h3,
.channel h3 {
  margin: 12px 0 8px;
  font-size: 21px;
}

.feature-grid p:last-child,
.channel p {
  margin-bottom: 0;
  color: var(--muted);
}

.process-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  counter-reset: steps;
  list-style: none;
}

.process-list li {
  min-width: 0;
  padding: 24px;
  border-top: 3px solid var(--teal);
  counter-increment: steps;
}

.process-list li::before {
  content: "0" counter(steps);
  display: block;
  margin-bottom: 18px;
  color: var(--red);
  font-size: 13px;
  font-weight: 800;
}

.process-list strong,
.process-list span {
  display: block;
}

.process-list span {
  margin-top: 8px;
  color: var(--muted);
}

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

.channel a,
.text-link {
  display: inline-block;
  margin-top: 22px;
  color: var(--teal-dark);
  font-weight: 800;
}

.weibo-component {
  display: flex;
  width: 100%;
  min-height: 28px;
  align-items: center;
  gap: 12px;
  margin-top: 22px;
}

.weibo-component iframe {
  width: 63px;
  height: 24px;
  flex: 0 0 63px;
  border: 0;
}

.weibo-component a {
  margin-top: 0;
  font-size: 14px;
}

footer {
  display: flex;
  min-height: 150px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

footer p {
  margin: 4px 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  justify-content: flex-end;
}

.policy-main {
  padding-bottom: 96px;
}

.policy-header {
  padding: 80px 0 56px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.policy-header h1 {
  font-size: 48px;
}

.policy-header > p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.policy-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 72px;
  padding-top: 64px;
}

.policy-layout aside {
  align-self: start;
  padding: 22px;
  border-left: 4px solid var(--yellow);
  background: #fff9e9;
}

.policy-layout aside p {
  margin-bottom: 0;
  color: var(--muted);
}

.policy-content {
  min-width: 0;
  max-width: 760px;
}

.policy-content section + section {
  margin-top: 48px;
}

.policy-content h2 {
  font-size: 25px;
}

.policy-content p {
  color: var(--muted);
}

@media (max-width: 820px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    padding-block: 18px;
  }

  nav {
    width: 100%;
    gap: 20px;
    overflow-x: auto;
  }

  nav a {
    white-space: nowrap;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 72px 0;
  }

  .hero-mark {
    width: 160px;
    height: 160px;
  }

  .hero-mark img {
    width: 116px;
    height: 116px;
  }

  h1 {
    font-size: 44px;
  }

  .lead {
    font-size: 18px;
  }

  .feature-grid,
  .process-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .policy-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

@media (max-width: 560px) {
  .site-header,
  main,
  footer {
    width: min(100% - 32px, 1120px);
  }

  .brand {
    font-size: 16px;
  }

  nav {
    gap: 16px;
  }

  .hero {
    min-height: 0;
    padding: 56px 0;
  }

  h1,
  .policy-header h1 {
    font-size: 36px;
  }

  .section-heading h2 {
    font-size: 29px;
  }

  .hero-mark {
    display: none;
  }

  .actions,
  .button {
    width: 100%;
  }

  .review-notice,
  .feature-grid,
  .process-list,
  .channel-grid {
    grid-template-columns: 1fr;
  }

  .review-notice {
    gap: 6px;
    padding: 20px;
  }

  .content-section,
  .process-section {
    padding-block: 72px;
  }

  .feature-grid article,
  .channel,
  .process-list li {
    padding: 22px;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 32px 0;
  }

  .footer-links {
    gap: 12px 20px;
    justify-content: flex-start;
  }
}

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