:root {
  --bg: #f6f2e9;
  --paper: rgba(255, 251, 244, 0.86);
  --paper-strong: #fffaf1;
  --ink: #1b2430;
  --muted: #5b6672;
  --line: rgba(27, 36, 48, 0.1);
  --accent: #176087;
  --accent-2: #f0a042;
  --mint: #9ac7b0;
  --shadow: 0 22px 60px rgba(21, 37, 53, 0.1);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --content-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  overflow-x: hidden;
  background:
    radial-gradient(circle at top left, rgba(240, 160, 66, 0.24), transparent 26%),
    radial-gradient(circle at top right, rgba(154, 199, 176, 0.24), transparent 28%),
    linear-gradient(180deg, #fdf8ef 0%, #f4efe4 42%, #eef2ef 100%);
  font-family: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  background-image:
    linear-gradient(rgba(27, 36, 48, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(27, 36, 48, 0.04) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.45), transparent 88%);
}

.site-wrap {
  width: min(calc(100% - 28px), var(--content-width));
  margin: 0 auto;
  padding: 18px 0 44px;
}

.site-header {
  position: sticky;
  top: 12px;
  z-index: 20;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 18px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: 999px;
  background: rgba(254, 250, 242, 0.76);
  backdrop-filter: blur(18px);
  box-shadow: 0 12px 34px rgba(21, 37, 53, 0.08);
  transition: transform 240ms ease, opacity 240ms ease, box-shadow 240ms ease;
  will-change: transform, opacity;
}

.site-header.is-hidden .site-header__inner {
  transform: translateY(calc(-100% - 18px));
  opacity: 0;
  pointer-events: none;
}

.site-header.is-compact .site-header__inner {
  box-shadow: 0 16px 40px rgba(21, 37, 53, 0.12);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background: #ffffff;
  border: 1px solid rgba(27, 36, 48, 0.1);
  box-shadow: 0 10px 22px rgba(21, 37, 53, 0.1);
  overflow: hidden;
}

.brand__mark img {
  width: 38px;
  height: 38px;
  object-fit: contain;
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.brand__text strong,
.page-hero h1,
.hero-section h1,
.section-heading h2,
.narrative-card h2,
.faq-panel h2,
.cta-band h2,
.site-footer h2 {
  font-family: "Kaiti SC", "STKaiti", "Source Han Serif SC", serif;
}

.brand__text strong {
  font-size: 1rem;
}

.brand__text em {
  color: var(--muted);
  font-style: normal;
  font-size: 0.82rem;
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 0;
  border-radius: 14px;
  background: rgba(23, 96, 135, 0.08);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  white-space: nowrap;
}

.site-nav a,
.button,
.text-link,
.button-link {
  transition: transform 180ms ease, background-color 180ms ease, color 180ms ease, border-color 180ms ease;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.site-nav a:hover {
  color: var(--ink);
  transform: translateY(-1px);
}

.site-nav__cta,
.button,
.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
}

.site-nav__cta {
  background: var(--ink);
  color: #fffef8;
}

.flash-stack {
  display: grid;
  gap: 12px;
  margin: 16px auto 0;
}

.flash {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(23, 96, 135, 0.1);
  background: rgba(255, 251, 244, 0.92);
  box-shadow: 0 12px 24px rgba(21, 37, 53, 0.06);
}

.flash--success {
  border-color: rgba(38, 130, 97, 0.18);
}

.flash--warning {
  border-color: rgba(230, 166, 55, 0.22);
}

.flash--danger {
  border-color: rgba(185, 73, 67, 0.22);
}

.hero-section,
.page-hero,
.section-block,
.site-footer {
  animation: rise-in 620ms ease both;
}

.hero-section {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 28px;
  align-items: center;
  min-height: calc(100vh - 150px);
  padding: 36px 0 18px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.83rem;
  font-weight: 800;
}

.hero-section h1,
.page-hero h1 {
  margin: 0;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.title-brand-emphasis {
  display: inline-block;
  position: relative;
  z-index: 0;
  margin-right: 0.08em;
  padding: 0 0.04em 0.02em;
  font-size: 1.3em;
  letter-spacing: -0.06em;
  color: #0f5d88;
  text-shadow: 0 6px 18px rgba(15, 93, 136, 0.16);
}

.title-brand-emphasis::after {
  position: absolute;
  left: -0.02em;
  right: -0.02em;
  bottom: 0.08em;
  height: 0.28em;
  z-index: -1;
  content: "";
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(240, 160, 66, 0.34), rgba(240, 160, 66, 0.16));
}

.hero-section h1 {
  font-size: clamp(2.7rem, 5.8vw, 5.2rem);
}

.page-hero {
  padding: 84px 0 18px;
  max-width: 860px;
}

.page-hero h1 {
  font-size: clamp(2.3rem, 4.4vw, 4rem);
}

.hero-section__text,
.page-hero p,
.section-heading p,
.content-card p,
.timeline-preview__item p,
.timeline-full__body p,
.narrative-card p,
.faq-panel p,
.site-footer p,
.muted,
.rich-copy,
.content-card__meta {
  color: var(--muted);
  line-height: 1.78;
}

.hero-section__actions,
.cta-band__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 28px 0 24px;
}

.hero-section__copy,
.hero-section__panel,
.section-block--split > *,
.site-footer__grid > * {
  min-width: 0;
}

.button--primary {
  background: linear-gradient(135deg, var(--accent), #3d8caf);
  color: #ffffff;
}

.button--ghost {
  border: 1px solid rgba(27, 36, 48, 0.14);
  background: rgba(255, 251, 244, 0.84);
  color: var(--ink);
}

.button:hover,
.button-link:hover,
.site-nav__cta:hover {
  transform: translateY(-2px);
}

.hero-highlights,
.bullet-list,
.footer-list {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.hero-highlights li,
.bullet-list li,
.footer-list li {
  position: relative;
  padding-left: 22px;
}

.hero-highlights li::before,
.bullet-list li::before,
.footer-list li::before {
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  content: "";
  background: var(--accent-2);
  box-shadow: 0 0 0 5px rgba(240, 160, 66, 0.16);
}

.hero-section__panel {
  position: relative;
}

.hero-section__panel::before {
  position: absolute;
  inset: 28px 0 -20px 22px;
  z-index: -1;
  content: "";
  border-radius: 30px;
  background: linear-gradient(145deg, rgba(23, 96, 135, 0.16), rgba(240, 160, 66, 0.18));
  filter: blur(8px);
}

.hero-section__stack {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.glass-card,
.content-card,
.narrative-card,
.faq-panel,
.contact-form,
.site-footer,
.timeline-full__item {
  border: 1px solid rgba(255, 255, 255, 0.56);
  border-radius: var(--radius-lg);
  background: var(--paper);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.glass-card,
.content-card,
.narrative-card,
.faq-panel,
.contact-form,
.timeline-full__item {
  padding: 24px;
}

.glass-card--lead {
  padding: 28px;
  background:
    linear-gradient(135deg, rgba(255, 251, 244, 0.92), rgba(239, 247, 249, 0.82)),
    linear-gradient(135deg, rgba(23, 96, 135, 0.1), rgba(240, 160, 66, 0.08));
}

.glass-card--accent {
  background: linear-gradient(145deg, rgba(23, 96, 135, 0.88), rgba(61, 140, 175, 0.88));
  color: #f6fbff;
}

.glass-card--accent p,
.glass-card--accent .card-tag {
  color: rgba(246, 251, 255, 0.9);
}

.card-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin: 14px 0 44px;
}

.stats-bar article {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 251, 244, 0.8);
}

.stats-bar strong {
  display: block;
  margin-bottom: 8px;
  font-size: 2.1rem;
}

.section-block {
  padding: 42px 0;
}

.section-block--alt {
  padding: 36px;
  border-radius: var(--radius-xl);
  background: rgba(234, 241, 244, 0.76);
}

.section-block--split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 22px;
  align-items: start;
}

.section-heading {
  max-width: 800px;
  margin-bottom: 28px;
}

.section-heading h2,
.narrative-card h2,
.faq-panel h2,
.cta-band h2,
.site-footer h2 {
  margin: 0 0 12px;
  font-size: clamp(1.9rem, 4vw, 3rem);
  line-height: 1.18;
}

.card-grid {
  display: grid;
  gap: 18px;
}

.card-grid--three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card-grid--four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.content-card h2,
.content-card h3,
.glass-card h2,
.glass-card h3,
.timeline-preview__item h3,
.timeline-full__body h2 {
  margin: 12px 0 10px;
  overflow-wrap: anywhere;
}

.content-card__meta {
  margin-top: 10px;
  font-weight: 700;
}

.content-card--compact {
  min-height: 240px;
}

.content-card--tall {
  min-height: 290px;
}

.text-link {
  display: inline-flex;
  margin-top: 14px;
  color: var(--accent);
  font-weight: 700;
  text-decoration: none;
}

.text-link:hover {
  transform: translateX(2px);
}

.timeline-preview {
  display: grid;
  gap: 14px;
  margin-bottom: 22px;
}

.timeline-preview__item,
.timeline-full__item {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 18px;
  align-items: start;
}

.timeline-preview__item span,
.timeline-full__month {
  color: var(--accent);
  font-weight: 800;
  letter-spacing: 0.08em;
}

.timeline-full {
  display: grid;
  gap: 16px;
}

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-list details {
  padding: 16px 0;
  border-top: 1px solid rgba(27, 36, 48, 0.08);
}

.faq-list details:first-child {
  border-top: 0;
  padding-top: 0;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

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

.faq-list details[open] summary {
  margin-bottom: 10px;
}

.cta-band {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 22px;
  align-items: center;
  padding: 28px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(22, 96, 135, 0.12), rgba(240, 160, 66, 0.16));
}

.contact-form {
  display: grid;
  gap: 14px;
}

.contact-form label {
  display: grid;
  gap: 8px;
  font-weight: 700;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid rgba(27, 36, 48, 0.14);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.84);
  font: inherit;
  font-size: 16px;
}

.site-footer {
  margin-top: 46px;
  padding: 28px;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.site-footer__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid rgba(27, 36, 48, 0.08);
  color: var(--muted);
}

.site-footer__meta a {
  color: var(--accent);
  text-decoration: none;
}

.about-logo-strip {
  width: min(100%, 520px);
  margin-top: 22px;
  padding: 12px 16px;
  border: 1px solid rgba(27, 36, 48, 0.1);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 14px 32px rgba(21, 37, 53, 0.08);
}

.about-logo-strip img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 96px;
  object-fit: contain;
}

@media (max-width: 1240px) {
  .site-wrap {
    width: min(calc(100% - 24px), var(--content-width));
  }

  .site-header__inner {
    gap: 14px;
    padding: 14px 16px;
  }

  .site-nav {
    gap: 16px;
  }

  .site-nav a {
    font-size: 0.92rem;
  }

  .hero-section {
    gap: 24px;
    padding-top: 30px;
  }

  .page-hero {
    padding-top: 72px;
  }
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1080px) {
  .hero-section,
  .section-block--split,
  .site-footer__grid,
  .cta-band {
    grid-template-columns: 1fr;
  }

  .hero-section {
    min-height: auto;
  }

  .stats-bar,
  .card-grid--four {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 960px) {
  .site-wrap {
    width: min(calc(100% - 18px), var(--content-width));
  }

  .site-header {
    top: 8px;
  }

  .site-header__inner {
    position: relative;
    border-radius: 28px;
    align-items: center;
    padding: 14px 16px;
    transform: none !important;
    opacity: 1 !important;
    pointer-events: auto !important;
  }

  .brand {
    flex: 1 1 auto;
    min-width: 0;
  }

  .brand__text strong {
    font-size: 0.96rem;
  }

  .brand__text em {
    font-size: 0.8rem;
  }

  .nav-toggle {
    display: inline-block;
    flex: 0 0 auto;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 22px;
    background: rgba(254, 250, 242, 0.95);
    box-shadow: 0 14px 32px rgba(21, 37, 53, 0.12);
    white-space: normal;
  }

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

  .site-nav a {
    padding: 12px 14px;
    border-radius: 14px;
  }

  .hero-section {
    padding-top: 22px;
  }

  .hero-section h1 {
    font-size: clamp(2.35rem, 6.8vw, 4.1rem);
  }

  .page-hero {
    padding-top: 62px;
  }

  .section-block {
    padding: 34px 0;
  }

  .section-block--alt,
  .cta-band,
  .site-footer {
    padding: 24px;
  }

  .timeline-preview__item,
  .timeline-full__item {
    grid-template-columns: 108px 1fr;
    gap: 14px;
  }
}

@media (max-width: 640px) {
  .site-wrap {
    width: min(calc(100% - 16px), var(--content-width));
    padding-top: 12px;
  }

  .site-header__inner {
    padding: 12px 14px;
  }

  .brand {
    gap: 10px;
  }

  .brand__mark {
    width: 44px;
    height: 44px;
    border-radius: 14px;
  }

  .hero-section__actions,
  .cta-band__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .button,
  .button-link {
    width: 100%;
  }

  .hero-section__stack,
  .stats-bar,
  .card-grid--three,
  .card-grid--four {
    grid-template-columns: 1fr;
  }

  .content-card--compact,
  .content-card--tall {
    min-height: auto;
  }

  .section-block,
  .site-footer {
    padding-top: 28px;
    padding-bottom: 28px;
  }

  .section-block--alt,
  .cta-band,
  .site-footer {
    padding: 20px;
  }

  .page-hero {
    padding-top: 48px;
  }

  .hero-section h1 {
    font-size: clamp(2.1rem, 10vw, 3rem);
  }

  .page-hero h1 {
    font-size: clamp(1.9rem, 9vw, 2.8rem);
  }

  .timeline-preview__item,
  .timeline-full__item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .site-footer__meta {
    flex-direction: column;
    align-items: flex-start;
  }
}