:root {
  --ink: #181a20;
  --ink-soft: #505866;
  --line: #e6e8ec;
  --surface: #f6f7f9;
  --white: #ffffff;
  --yellow: #f2ba16;
  --yellow-soft: #fff5c8;
  --coral: #f06449;
  --coral-soft: #fff0ec;
  --teal: #147d73;
  --teal-soft: #e7f5f2;
  --dark-panel: #20242c;
  --container: 1180px;
  --radius: 8px;
  --shadow: 0 20px 50px rgba(24, 26, 32, 0.08);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

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

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

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

a:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(20, 125, 115, 0.45);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 10px 16px;
  color: var(--white);
  background: var(--ink);
  border-radius: 4px;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.container,
.header-inner,
.footer-inner,
.hero-inner {
  width: min(calc(100% - 48px), var(--container));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: 72px;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  min-height: 72px;
  display: grid;
  grid-template-columns: 150px 1fr 150px;
  align-items: center;
  gap: 24px;
}

.brand-mark {
  position: relative;
  display: block;
  width: 132px;
  height: 48px;
  overflow: hidden;
}

.brand-mark img {
  width: 132px;
  max-width: none;
  height: 132px;
  transform: translateY(-43px);
}

.site-nav,
.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 34px;
}

.site-nav a,
.footer-nav a {
  position: relative;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding-block: 10px;
  color: #3f4651;
  font-size: 14px;
  line-height: 24px;
  font-weight: 700;
  white-space: nowrap;
}

.site-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -9px;
  left: 0;
  height: 2px;
  background: var(--yellow);
  transform: scaleX(0);
  transition: transform 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.header-action {
  justify-self: end;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 22px;
  color: var(--ink);
  background: var(--yellow);
  border: 1px solid var(--yellow);
  border-radius: 6px;
  font-size: 14px;
  font-weight: 800;
}

.hero {
  position: relative;
  background: var(--white);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 9px;
  background: var(--yellow);
}

.hero-inner {
  min-height: calc(100svh - 128px);
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(300px, 0.72fr);
  align-items: center;
  gap: clamp(48px, 8vw, 112px);
  padding-block: clamp(52px, 7vh, 84px);
}

.hero-copy {
  max-width: 680px;
}

.hero-note {
  width: fit-content;
  margin: 0 0 19px;
  padding: 5px 12px;
  color: #665117;
  background: var(--yellow-soft);
  border-left: 3px solid var(--yellow);
  font-size: 13px;
  font-weight: 800;
}

.hero h2 {
  margin: 0;
  font-size: clamp(38px, 5.2vw, 70px);
  line-height: 1.12;
  letter-spacing: 0;
}

.hero h2 span {
  display: block;
}

.hero-title-accent {
  margin-top: 10px;
  color: #343943;
  font-size: 0.62em;
  font-weight: 700;
  line-height: 1.3;
}

.hero-lead {
  max-width: 620px;
  margin: 25px 0 0;
  color: var(--ink-soft);
  font-size: clamp(16px, 1.45vw, 19px);
}

.hero-lead strong,
.section-heading strong,
.question-list strong {
  color: var(--ink);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  min-width: 142px;
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 11px 24px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 800;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--yellow);
  border-color: var(--yellow);
  box-shadow: 0 10px 24px rgba(242, 186, 22, 0.24);
}

.button-primary:hover {
  box-shadow: 0 14px 30px rgba(242, 186, 22, 0.33);
}

.button-secondary {
  color: var(--ink);
  background: var(--white);
  border-color: #cfd3da;
}

.button-secondary:hover {
  background: var(--surface);
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 26px 0 0;
  padding: 0;
  color: #5b626e;
  font-size: 13px;
  font-weight: 700;
  list-style: none;
}

.hero-points li {
  position: relative;
  padding-left: 15px;
}

.hero-points li::before {
  content: "";
  position: absolute;
  top: 0.65em;
  left: 0;
  width: 6px;
  height: 6px;
  background: var(--teal);
  border-radius: 50%;
}

.hero-media {
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-media img {
  width: auto;
  height: min(66vh, 610px);
  max-height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 24px 28px rgba(24, 26, 32, 0.2));
}

.section {
  padding-block: clamp(72px, 9vw, 116px);
}

.section-heading {
  display: grid;
  grid-template-columns: 58px minmax(0, 760px);
  gap: 22px;
  align-items: start;
  margin-bottom: 42px;
}

.section-index {
  margin: 3px 0 0;
  color: var(--teal);
  font-size: 13px;
  font-weight: 900;
}

.section-heading h2,
.question-intro h2,
.news-heading h2 {
  margin: 0;
  font-size: clamp(27px, 3.2vw, 42px);
  line-height: 1.25;
  letter-spacing: 0;
}

.section-heading p:not(.section-index) {
  max-width: 690px;
  margin: 13px 0 0;
  color: var(--ink-soft);
}

.entry-section {
  background: var(--surface);
}

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

.entry-card {
  min-height: 310px;
  display: flex;
  flex-direction: column;
  padding: clamp(25px, 3vw, 34px);
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 4px solid var(--coral);
  border-radius: var(--radius);
  box-shadow: 0 10px 28px rgba(24, 26, 32, 0.04);
}

.entry-card-primary {
  border-top-color: var(--yellow);
}

.entry-card:nth-child(3) {
  border-top-color: var(--teal);
}

.card-mark {
  width: 48px;
  height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #665117;
  background: var(--yellow-soft);
  border-radius: 6px;
  font-weight: 900;
}

.card-mark-coral {
  color: #9b3c29;
  background: var(--coral-soft);
}

.card-mark-teal {
  color: #0b5f57;
  background: var(--teal-soft);
}

.entry-card h3 {
  margin: 25px 0 9px;
  font-size: 21px;
  line-height: 1.35;
}

.entry-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
}

.card-meta {
  margin-top: auto;
  padding-top: 28px;
  color: #606874;
  font-size: 13px;
  font-weight: 700;
}

.feature-section {
  color: var(--white);
  background: var(--dark-panel);
}

.section-heading-light .section-index {
  color: var(--yellow);
}

.section-heading-light h2,
.section-heading-light strong {
  color: var(--white);
}

.section-heading-light p:not(.section-index) {
  color: #b9c0ca;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  grid-template-rows: repeat(2, minmax(230px, auto));
  gap: 18px;
}

.feature-card {
  position: relative;
  min-width: 0;
  padding: clamp(26px, 3.4vw, 42px);
  border: 1px solid #3a404b;
  border-radius: var(--radius);
  overflow: hidden;
}

.feature-card h3 {
  margin: 14px 0 10px;
  font-size: clamp(22px, 2.4vw, 32px);
  line-height: 1.3;
}

.feature-card p {
  max-width: 590px;
  margin: 0;
  color: #c6cbd2;
}

.feature-card-wide {
  grid-row: 1 / span 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(180px, 0.62fr);
  align-items: end;
  gap: 32px;
  background: #292e37;
}

.feature-card-yellow {
  color: var(--ink);
  background: var(--yellow);
  border-color: var(--yellow);
}

.feature-card-yellow p {
  color: #554713;
}

.feature-card-white {
  color: var(--ink);
  background: var(--white);
  border-color: var(--white);
}

.feature-card-white p {
  color: var(--ink-soft);
}

.feature-tag {
  display: inline-block;
  color: inherit;
  font-size: 13px;
  font-weight: 900;
}

.data-lines {
  height: 230px;
  display: flex;
  align-items: flex-end;
  gap: 12px;
  padding: 18px;
  border-bottom: 2px solid #7d8591;
}

.data-lines span {
  flex: 1;
  min-width: 10px;
  background: var(--teal);
  border-radius: 3px 3px 0 0;
}

.data-lines span:nth-child(1) { height: 34%; }
.data-lines span:nth-child(2) { height: 62%; background: var(--yellow); }
.data-lines span:nth-child(3) { height: 46%; }
.data-lines span:nth-child(4) { height: 81%; background: var(--coral); }
.data-lines span:nth-child(5) { height: 69%; background: var(--yellow); }

.trend-line {
  position: relative;
  height: 50px;
  margin-top: 22px;
  border-bottom: 2px solid rgba(24, 26, 32, 0.25);
}

.trend-line::before,
.trend-line::after,
.trend-line span {
  content: "";
  position: absolute;
  height: 3px;
  background: var(--ink);
  transform-origin: left center;
}

.trend-line::before {
  bottom: 11px;
  left: 3%;
  width: 42%;
  transform: rotate(-13deg);
}

.trend-line span {
  bottom: 20px;
  left: 43%;
  width: 28%;
  transform: rotate(10deg);
}

.trend-line::after {
  bottom: 15px;
  left: 69%;
  width: 28%;
  transform: rotate(-25deg);
}

.shortcut-dots {
  display: flex;
  gap: 10px;
  margin-top: 25px;
}

.shortcut-dots span {
  width: 38px;
  height: 38px;
  background: var(--teal-soft);
  border: 1px solid #cce9e4;
  border-radius: 6px;
}

.shortcut-dots span:nth-child(2) { background: var(--yellow-soft); border-color: #f4df87; }
.shortcut-dots span:nth-child(3) { background: var(--coral-soft); border-color: #f2d2ca; }
.shortcut-dots span:nth-child(4) { background: #eef0f4; border-color: #dfe2e7; }

.question-section {
  background: var(--white);
}

.question-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.58fr) minmax(0, 1fr);
  gap: clamp(46px, 8vw, 112px);
  align-items: start;
}

.question-intro {
  position: sticky;
  top: 110px;
}

.question-intro .section-index {
  margin-bottom: 17px;
}

.question-intro > p:last-child {
  margin: 15px 0 0;
  color: var(--ink-soft);
}

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

.question-list details {
  border-bottom: 1px solid var(--line);
}

.question-list summary {
  position: relative;
  min-height: 76px;
  display: flex;
  align-items: center;
  padding: 20px 52px 20px 4px;
  font-size: 17px;
  font-weight: 800;
  cursor: pointer;
  list-style: none;
}

.question-list summary::-webkit-details-marker {
  display: none;
}

.question-list summary::before,
.question-list summary::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 10px;
  width: 16px;
  height: 2px;
  background: var(--ink);
  transition: transform 180ms ease;
}

.question-list summary::after {
  transform: rotate(90deg);
}

.question-list details[open] summary::after {
  transform: rotate(0deg);
}

.question-list details > p {
  margin: -5px 0 0;
  padding: 0 48px 25px 4px;
  color: var(--ink-soft);
}

.news-section {
  background: var(--surface);
  border-top: 1px solid var(--line);
}

.news-heading {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-bottom: 38px;
}

.news-heading span {
  flex: 1;
  height: 1px;
  background: var(--line);
}

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

.news-card {
  min-width: 0;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.news-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #0b1014;
}

.news-card h3 {
  min-height: 104px;
  margin: 0;
  display: flex;
  align-items: flex-start;
  padding: 23px 24px 26px;
  font-size: 18px;
  line-height: 1.55;
}

.site-footer {
  color: #d6d9de;
  background: #171a1f;
}

.footer-inner {
  min-height: 160px;
  display: grid;
  grid-template-columns: 150px 1fr;
  align-items: center;
  gap: 30px;
}

.brand-mark-footer {
  filter: none;
}

.footer-nav a {
  color: #c4c8cf;
}

.footer-nav a:hover,
.footer-nav a:focus-visible {
  color: var(--yellow);
}

@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(250px, 0.58fr);
    gap: 42px;
  }

  .hero-media img {
    height: min(58vh, 510px);
  }

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

  .data-lines {
    height: 135px;
  }

  .footer-inner {
    grid-template-columns: 138px 1fr;
    padding-block: 34px;
  }

}

@media (max-width: 780px) {
  html {
    scroll-padding-top: 70px;
  }

  .container,
  .header-inner,
  .footer-inner,
  .hero-inner {
    width: min(calc(100% - 32px), var(--container));
  }

  .site-header,
  .header-inner {
    min-height: 64px;
  }

  .header-inner {
    grid-template-columns: 132px 1fr;
  }

  .site-nav {
    display: none;
  }

  .header-action {
    padding-inline: 17px;
  }

  .hero::before {
    width: 5px;
  }

  .hero-inner {
    min-height: 0;
    grid-template-columns: 1fr;
    gap: 28px;
    padding-block: 46px 38px;
  }

  .hero-copy {
    max-width: none;
  }

  .hero-media img {
    width: auto;
    height: 270px;
  }

  .section {
    padding-block: 72px;
  }

  .section-heading {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 12px;
    margin-bottom: 32px;
  }

  .entry-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }

  .entry-card {
    min-height: 250px;
  }

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

  .feature-card-wide {
    grid-row: auto;
  }

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

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

  .question-intro {
    position: static;
  }

  .news-card {
    display: grid;
    grid-template-columns: minmax(150px, 0.72fr) minmax(0, 1fr);
    align-items: stretch;
  }

  .news-card img {
    height: auto;
    aspect-ratio: 16 / 9;
    align-self: start;
  }

  .news-card h3 {
    min-height: 142px;
    align-items: center;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 25px;
  }

  .footer-nav {
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 14px 26px;
  }
}

@media (max-width: 520px) {
  .hero-note {
    margin-bottom: 15px;
  }

  .hero h2 {
    font-size: 36px;
  }

  .hero-title-accent {
    font-size: 0.58em;
  }

  .hero-lead {
    margin-top: 18px;
    font-size: 15px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 23px;
  }

  .button {
    min-width: 0;
    padding-inline: 14px;
  }

  .hero-points {
    margin-top: 19px;
    gap: 7px 16px;
  }

  .hero-media img {
    height: 220px;
  }

  .section-heading {
    grid-template-columns: 1fr;
  }

  .section-heading .section-index {
    margin-bottom: -4px;
  }

  .feature-card {
    min-height: 0;
  }

  .feature-card-wide {
    gap: 15px;
  }

  .data-lines {
    height: 115px;
  }

  .question-list summary {
    min-height: 70px;
    padding-right: 45px;
    font-size: 16px;
  }

  .news-card {
    display: block;
  }

  .news-card img {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
  }

  .news-card h3 {
    min-height: 94px;
    padding: 19px 20px 22px;
    font-size: 17px;
  }
}

@media (max-width: 360px) {
  .container,
  .header-inner,
  .footer-inner,
  .hero-inner {
    width: min(calc(100% - 24px), var(--container));
  }

  .header-inner {
    grid-template-columns: 112px 1fr;
    gap: 10px;
  }

  .brand-mark {
    width: 112px;
    height: 44px;
  }

  .brand-mark img {
    width: 112px;
    height: 112px;
    transform: translateY(-36px);
  }

  .header-action {
    padding-inline: 12px;
  }

  .hero h2 {
    font-size: 32px;
  }

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

  .hero-media img {
    height: 190px;
  }

  .entry-card,
  .feature-card {
    padding: 24px 20px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}