:root {
  --navy-980: #061226;
  --navy-940: #091a36;
  --navy-880: #0d2a5f;
  --royal: #105bd8;
  --azure: #2f8dff;
  --gold: #f4c84b;
  --gold-soft: #fff4c8;
  --teal: #157a72;
  --wine: #8b2f4d;
  --ink: #102033;
  --muted: #607086;
  --line: #dce5f1;
  --paper: #f5f7fb;
  --white: #ffffff;
  --shadow: 0 8px 8px rgba(6, 18, 38, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: linear-gradient(180deg, #f7f9fd 0%, #eef4ff 100%);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.72;
}

body[data-lang="en"] {
  font-family: Georgia, "Times New Roman", "PingFang SC", "Microsoft YaHei", serif;
}

body[data-lang="en"] .hero h1,
body[data-lang="en"] .overview-copy h2,
body[data-lang="en"] .section-heading h2,
body[data-lang="en"] .compliance-copy h2 {
  font-family: Georgia, "Times New Roman", "PingFang SC", "Microsoft YaHei", serif;
}

body[data-lang="en"] .hero h1 {
  font-size: 74px;
}

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

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 76px;
  padding: 12px 52px;
  color: var(--white);
  background: rgba(6, 18, 38, 0.78);
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(20px);
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 22px;
  min-width: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 156px;
}

.brand-mark {
  width: 44px;
  height: 44px;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: 8px;
  box-shadow: 0 6px 8px rgba(0, 0, 0, 0.18);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 18px;
  line-height: 1.2;
  letter-spacing: 0;
}

.brand small {
  color: rgba(255, 255, 255, 0.7);
  font-size: 12px;
  line-height: 1.25;
}

.nav {
  display: flex;
  align-items: center;
  gap: 26px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 14px;
  white-space: nowrap;
}

.nav a {
  display: inline-flex;
  align-items: center;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}

.nav span {
  color: inherit;
  font-size: inherit;
  line-height: 1.2;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--gold);
}

.language-switch {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 2px;
  padding: 3px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.09);
}

.language-switch button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 30px;
  padding: 0 10px;
  color: rgba(255, 255, 255, 0.72);
  font: inherit;
  font-size: 12px;
  font-weight: 800;
  border: 0;
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
}

.language-switch button[aria-pressed="true"] {
  color: var(--navy-980);
  background: var(--gold);
}

.language-switch button:focus-visible {
  outline: 2px solid var(--white);
  outline-offset: 2px;
}

.hero {
  position: relative;
  min-height: 78vh;
  overflow: hidden;
  color: var(--white);
  background: var(--navy-980);
}

.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 68% 48%;
  opacity: 0.55;
  filter: saturate(1.08) contrast(1.04);
  transform: scale(1.03);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(6, 18, 38, 0.98) 0%, rgba(6, 18, 38, 0.9) 42%, rgba(6, 18, 38, 0.42) 75%, rgba(6, 18, 38, 0.26) 100%),
    linear-gradient(180deg, rgba(6, 18, 38, 0.1) 0%, rgba(6, 18, 38, 0.22) 78%, rgba(245, 247, 251, 0.94) 100%);
}

.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 120px;
  background: linear-gradient(0deg, var(--paper), rgba(245, 247, 251, 0));
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: min(1180px, calc(100% - 52px));
  margin: 0 auto;
  padding: 164px 0 124px;
}

.hero-kicker,
.eyebrow {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
}

.hero h1 {
  width: min(760px, 100%);
  margin: 0;
  font-family: "Songti SC", "Noto Serif SC", "Source Han Serif SC", serif;
  font-size: 78px;
  line-height: 0.98;
  font-weight: 900;
}

.hero-subtitle {
  margin: 10px 0 0;
  color: rgba(255, 255, 255, 0.74);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 38px;
  line-height: 1.1;
  font-weight: 700;
}

.hero-lead {
  width: min(690px, 100%);
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.92);
  font-size: 21px;
  font-weight: 600;
}

.hero-lead span {
  display: block;
  margin-top: 10px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 16px;
  font-weight: 500;
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 800;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

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

.button.primary {
  color: var(--navy-980);
  background: linear-gradient(180deg, #ffe37a 0%, var(--gold) 100%);
  box-shadow: 0 8px 8px rgba(244, 200, 75, 0.18);
}

.button.secondary {
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.34);
}

.role-strip {
  position: relative;
  z-index: 4;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: min(1180px, calc(100% - 52px));
  margin: -66px auto 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.62);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.role-strip article {
  min-height: 158px;
  padding: 28px 30px 30px;
  border-right: 1px solid var(--line);
}

.role-strip article:last-child {
  border-right: 0;
}

.role-code {
  display: inline-block;
  color: var(--teal);
  font-family: Georgia, serif;
  font-size: 15px;
  font-weight: 800;
}

.role-strip h2 {
  margin: 12px 0 6px;
  color: var(--navy-940);
  font-size: 23px;
  line-height: 1.24;
}

.role-strip p,
.role-strip small {
  display: block;
  margin: 0;
  color: var(--muted);
}

.role-strip small {
  margin-top: 7px;
  color: #7a8798;
  font-size: 13px;
  line-height: 1.55;
}

.section {
  width: min(1180px, calc(100% - 52px));
  margin: 0 auto;
  padding: 96px 0;
}

.overview {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 430px;
  gap: 44px;
  align-items: center;
}

.overview-copy h2,
.section-heading h2,
.compliance-copy h2 {
  margin: 0;
  color: var(--navy-980);
  font-family: "Songti SC", "Noto Serif SC", "Source Han Serif SC", serif;
  font-size: 40px;
  line-height: 1.22;
}

.overview-copy p:not(.eyebrow),
.section-heading p:not(.eyebrow) {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.en {
  color: #778397;
  font-family: Georgia, "Times New Roman", serif;
}

.overview-panel {
  display: grid;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  box-shadow: 0 8px 8px rgba(6, 18, 38, 0.06);
}

.overview-panel div {
  display: grid;
  grid-template-columns: 86px 1fr;
  align-items: center;
  column-gap: 18px;
  min-height: 112px;
  padding: 22px 26px;
  background: var(--white);
}

.overview-panel strong {
  grid-row: span 2;
  color: var(--wine);
  font-family: Georgia, serif;
  font-size: 44px;
  line-height: 1;
}

.overview-panel span {
  color: var(--navy-940);
  font-size: 18px;
  font-weight: 800;
}

.overview-panel small {
  color: var(--muted);
  font-size: 13px;
}

.section-heading {
  width: min(760px, 100%);
  margin: 0 auto 42px;
  text-align: center;
}

.section-heading.align-left {
  margin-left: 0;
  text-align: left;
}

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

.audience-card {
  position: relative;
  min-height: 360px;
  padding: 32px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 8px 8px rgba(16, 32, 51, 0.06);
}

.audience-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--gold), var(--teal));
}

.featured-card {
  background: var(--navy-940);
  border-color: rgba(255, 255, 255, 0.14);
}

.featured-card h3,
.featured-card p {
  color: var(--white);
}

.featured-card .en,
.featured-card .card-index {
  color: rgba(255, 255, 255, 0.68);
}

.card-index {
  display: block;
  color: var(--teal);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.audience-card h3,
.feature-item h3,
.process-step h3,
.contact-panel h3 {
  margin: 18px 0 12px;
  color: var(--navy-980);
  font-size: 23px;
  line-height: 1.32;
}

.audience-card p,
.feature-item p,
.process-step p,
.compliance-copy p,
.contact-panel dd {
  margin: 0;
  color: var(--muted);
}

.audience-card p + p {
  margin-top: 16px;
}

.feature-section {
  background:
    linear-gradient(180deg, rgba(6, 18, 38, 0.96), rgba(9, 26, 54, 0.98)),
    var(--navy-940);
  color: var(--white);
}

.feature-inner {
  width: min(1180px, calc(100% - 52px));
  padding: 96px 0;
}

.feature-section .section-heading h2,
.feature-section .section-heading p {
  color: var(--white);
}

.feature-section .section-heading p:not(.eyebrow) {
  color: rgba(255, 255, 255, 0.7);
}

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

.feature-item {
  min-height: 224px;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.feature-item span {
  color: var(--gold);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 13px;
  font-weight: 800;
}

.feature-item h3 {
  margin-top: 14px;
  color: var(--white);
}

.feature-item p {
  color: rgba(255, 255, 255, 0.7);
}

.process-section {
  padding-bottom: 88px;
}

.process-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.process-step {
  position: relative;
  min-height: 244px;
  padding: 28px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 8px 8px rgba(6, 18, 38, 0.05);
}

.process-step::after {
  content: "";
  position: absolute;
  left: 28px;
  right: 28px;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--royal), var(--gold), var(--teal));
}

.process-step span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 46px;
  height: 32px;
  padding: 0 10px;
  color: var(--navy-980);
  background: var(--gold-soft);
  border: 1px solid rgba(244, 200, 75, 0.62);
  border-radius: 99px;
  font-family: Georgia, serif;
  font-weight: 800;
}

.process-step small {
  display: block;
  margin-top: 16px;
  color: var(--teal);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 13px;
  font-weight: 700;
}

.compliance-section {
  background:
    linear-gradient(90deg, rgba(244, 200, 75, 0.18) 0 24%, transparent 24%),
    #eef4ff;
}

.compliance-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(330px, 0.85fr);
  gap: 32px;
  align-items: stretch;
  padding: 92px 0;
}

.compliance-copy,
.contact-panel {
  border-radius: 8px;
}

.compliance-copy {
  position: relative;
  padding: 40px;
  background: var(--white);
  border: 1px solid rgba(244, 200, 75, 0.48);
  border-top: 4px solid var(--gold);
  box-shadow: 0 8px 8px rgba(6, 18, 38, 0.06);
}

.compliance-copy .eyebrow {
  color: var(--teal);
}

.compliance-copy p {
  margin-top: 18px;
}

.contact-panel {
  padding: 36px;
  color: var(--white);
  background:
    linear-gradient(145deg, var(--navy-980), var(--navy-880));
  box-shadow: var(--shadow);
}

.contact-panel h3 {
  margin-top: 0;
  color: var(--white);
}

.contact-panel h3 span {
  display: block;
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.52);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 15px;
}

.contact-panel dl {
  margin: 22px 0 0;
}

.contact-panel div {
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.contact-panel dt {
  color: rgba(244, 200, 75, 0.95);
  font-size: 13px;
  font-weight: 800;
}

.contact-panel dd {
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.82);
}

.contact-download-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 14px;
  color: var(--navy-980);
  background: var(--gold);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 800;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.contact-download-link:hover,
.contact-download-link:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 8px 8px rgba(244, 200, 75, 0.18);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 30px 52px;
  color: rgba(255, 255, 255, 0.7);
  background: var(--navy-980);
  font-size: 13px;
}

.footer p {
  margin: 0;
}

@media (max-width: 1020px) {
  .site-header {
    padding: 12px 24px;
  }

  .header-actions {
    gap: 16px;
  }

  .nav {
    gap: 16px;
  }

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

  body[data-lang="en"] .hero h1 {
    font-size: 62px;
  }

  .overview,
  .compliance-inner {
    grid-template-columns: 1fr;
  }

  .overview-panel {
    width: min(100%, 560px);
  }

  .role-strip,
  .audience-grid,
  .feature-grid,
  .process-list {
    grid-template-columns: 1fr 1fr;
  }

  .role-strip article:nth-child(2) {
    border-right: 0;
  }

  .role-strip article:last-child {
    grid-column: span 2;
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 720px) {
  .site-header {
    position: absolute;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background: rgba(6, 18, 38, 0.72);
  }

  .brand {
    min-width: 0;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .header-actions {
    display: contents;
  }

  .nav {
    grid-column: 1 / -1;
    grid-row: 2;
    width: 100%;
    justify-content: space-between;
    gap: 8px;
    overflow: visible;
    font-size: 12px;
  }

  .nav a {
    flex: 1 1 0;
    justify-content: center;
    min-width: 0;
    padding-top: 6px;
    text-align: center;
  }

  .language-switch {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
  }

  .language-switch button {
    min-width: 34px;
    height: 28px;
    padding: 0 8px;
  }

  .hero {
    min-height: auto;
  }

  .hero-bg {
    object-position: 70% 50%;
    opacity: 0.42;
  }

  .hero-overlay {
    background:
      linear-gradient(90deg, rgba(6, 18, 38, 0.98) 0%, rgba(6, 18, 38, 0.86) 74%, rgba(6, 18, 38, 0.58) 100%),
      linear-gradient(180deg, rgba(6, 18, 38, 0.05) 0%, rgba(6, 18, 38, 0.16) 74%, rgba(245, 247, 251, 0.95) 100%);
  }

  .hero-inner {
    width: min(100% - 36px, 1180px);
    padding: 158px 0 86px;
  }

  .hero h1 {
    font-size: 48px;
  }

  body[data-lang="en"] .hero h1 {
    font-size: 42px;
  }

  .hero-subtitle {
    font-size: 25px;
  }

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

  .hero-lead span {
    font-size: 14px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
    width: min(292px, 100%);
  }

  .button {
    width: 100%;
  }

  .role-strip,
  .audience-grid,
  .feature-grid,
  .process-list {
    grid-template-columns: 1fr;
  }

  .role-strip,
  .section,
  .feature-inner {
    width: min(100% - 36px, 1180px);
  }

  .role-strip {
    margin-top: -30px;
  }

  .role-strip article,
  .role-strip article:nth-child(2),
  .role-strip article:last-child {
    grid-column: auto;
    min-height: auto;
    border-right: 0;
    border-top: 1px solid var(--line);
    padding: 22px;
  }

  .role-strip article:first-child {
    border-top: 0;
  }

  .section,
  .feature-inner,
  .compliance-inner {
    padding-top: 66px;
    padding-bottom: 66px;
  }

  .overview {
    gap: 28px;
  }

  .overview-copy h2,
  .section-heading h2,
  .compliance-copy h2 {
    font-size: 31px;
  }

  .overview-panel div {
    grid-template-columns: 68px 1fr;
    min-height: 96px;
    padding: 20px;
  }

  .overview-panel strong {
    font-size: 36px;
  }

  .section-heading {
    text-align: left;
  }

  .audience-card,
  .feature-item,
  .process-step {
    min-height: auto;
    padding: 26px;
  }

  .compliance-inner {
    width: min(100% - 36px, 1180px);
  }

  .compliance-copy,
  .contact-panel {
    padding: 26px;
  }

  .footer {
    flex-direction: column;
    padding: 24px 18px;
  }
}