:root {
  --paper: #f7fbfa;
  --surface: #ffffff;
  --ink: #263238;
  --muted: #68757c;
  --teal: #357f7a;
  --leaf: #6f9d6b;
  --coral: #c9634d;
  --gold: #bd9440;
  --line: #dce8e5;
  --shadow: 0 18px 45px rgba(47, 79, 79, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  letter-spacing: 0;
}

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

button,
select {
  font: inherit;
}

.hero {
  min-height: 640px;
  padding: 22px 40px 56px;
  background:
    linear-gradient(90deg, rgba(247, 251, 250, 0.94) 0%, rgba(247, 251, 250, 0.78) 38%, rgba(247, 251, 250, 0.28) 100%),
    url("assets/huaying-background.png") center / cover no-repeat;
  border-bottom: 1px solid var(--line);
}

.topbar {
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-size: 20px;
  font-weight: 800;
  color: var(--teal);
}

.nav-links {
  display: flex;
  gap: 10px;
  align-items: center;
}

.nav-links a,
.primary-action,
.secondary-action,
.tab-button,
.unit-button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
}

.nav-links a {
  padding: 0 14px;
  color: #44535a;
  border: 1px solid transparent;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.72);
  outline: none;
}

.notice-strip {
  max-width: 1180px;
  margin: 26px auto 0;
  display: grid;
  grid-template-columns: 110px 1fr;
  overflow: hidden;
  border: 1px solid rgba(53, 127, 122, 0.22);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow);
}

.notice-label {
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--teal);
  color: #ffffff;
  font-weight: 700;
}

.notice-window {
  overflow: hidden;
}

.notice-track {
  min-height: 48px;
  display: flex;
  align-items: center;
  gap: 34px;
  width: max-content;
  animation: notice-scroll 28s linear infinite;
}

.notice-track span {
  white-space: nowrap;
  color: #34454c;
}

.notice-track strong {
  color: var(--coral);
  font-weight: 800;
}

.hero-copy {
  max-width: 1180px;
  margin: 116px auto 0;
}

.eyebrow,
.section-kicker {
  margin: 0 0 8px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 560px;
  margin: 0;
  color: #1f3637;
  font-size: 56px;
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-text {
  max-width: 560px;
  margin: 22px 0 0;
  color: #405158;
  font-size: 19px;
}

.hero-actions {
  margin-top: 34px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.primary-action,
.secondary-action {
  padding: 0 18px;
  font-weight: 700;
  border: 1px solid transparent;
}

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

.primary-action:hover,
.primary-action:focus-visible {
  background: #2c6d68;
  outline: none;
}

.secondary-action {
  color: var(--teal);
  background: rgba(255, 255, 255, 0.82);
  border-color: rgba(53, 127, 122, 0.26);
}

.secondary-action:hover,
.secondary-action:focus-visible {
  background: #ffffff;
  outline: none;
}

.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: 76px 40px 0;
}

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

.section-heading h2 {
  margin: 0;
  font-size: 32px;
  line-height: 1.25;
  letter-spacing: 0;
}

.section-heading p:last-child {
  margin: 12px 0 0;
  color: var(--muted);
}

.announcement-grid {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.announcement-card,
.timeline-item,
.media-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.announcement-card {
  min-height: 178px;
  padding: 22px;
  box-shadow: 0 12px 30px rgba(47, 79, 79, 0.08);
}

.announcement-date {
  color: var(--coral);
  font-weight: 800;
}

.announcement-card h3 {
  margin: 12px 0 8px;
  font-size: 20px;
}

.announcement-card p {
  margin: 0;
  color: var(--muted);
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  margin-top: 18px;
  padding: 0 10px;
  border-radius: 8px;
  background: #eef6f0;
  color: #416f4d;
  font-weight: 700;
  font-size: 13px;
}

.timeline {
  margin-top: 30px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.timeline-item {
  min-height: 210px;
  padding: 20px;
  position: relative;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  top: 0;
  height: 4px;
  background: var(--leaf);
}

.timeline-period {
  color: var(--gold);
  font-weight: 800;
}

.timeline-item h3 {
  margin: 12px 0 8px;
  font-size: 20px;
}

.timeline-item p {
  margin: 0;
  color: var(--muted);
}

.unit-layout {
  margin-top: 30px;
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 24px;
  align-items: start;
}

.unit-picker,
.unit-detail {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
}

.unit-picker {
  padding: 12px;
  position: sticky;
  top: 18px;
}

.mobile-select-label,
.unit-select {
  display: none;
}

.unit-buttons {
  display: grid;
  gap: 8px;
}

.unit-button {
  width: 100%;
  border: 1px solid transparent;
  background: transparent;
  color: #405158;
  text-align: left;
  justify-content: flex-start;
  padding: 0 12px;
  cursor: pointer;
}

.unit-button:hover,
.unit-button:focus-visible,
.unit-button.is-active {
  border-color: rgba(53, 127, 122, 0.26);
  background: #eef7f6;
  color: var(--teal);
  outline: none;
}

.unit-detail {
  min-height: 520px;
  padding: 28px;
}

.unit-detail-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  border-bottom: 1px solid var(--line);
  padding-bottom: 20px;
}

.unit-detail h3 {
  margin: 0;
  font-size: 28px;
  line-height: 1.25;
}

.unit-count {
  flex: 0 0 auto;
  color: var(--muted);
  font-weight: 700;
}

.tabs {
  margin-top: 22px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.tab-button {
  border: 1px solid var(--line);
  background: #ffffff;
  color: #44535a;
  padding: 0 16px;
  cursor: pointer;
  font-weight: 700;
}

.tab-button:hover,
.tab-button:focus-visible,
.tab-button.is-active {
  border-color: var(--teal);
  background: var(--teal);
  color: #ffffff;
  outline: none;
}

.tab-panel {
  display: none;
  padding-top: 24px;
}

.tab-panel.is-active {
  display: block;
}

.member-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.member-list li {
  min-height: 48px;
  display: flex;
  align-items: center;
  padding: 0 14px;
  border: 1px solid var(--line);
  background: #ffffff;
  color: #405158;
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.media-card {
  overflow: hidden;
}

.media-thumb {
  min-height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(135deg, rgba(53, 127, 122, 0.16), rgba(189, 148, 64, 0.18)),
    #f3f8f6;
  color: #4e6268;
  font-weight: 800;
}

.media-body {
  padding: 14px;
}

.media-type {
  color: var(--coral);
  font-size: 13px;
  font-weight: 800;
}

.media-body h4 {
  margin: 6px 0 6px;
  font-size: 17px;
}

.media-body p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.site-footer {
  margin-top: 84px;
  padding: 34px 40px;
  border-top: 1px solid var(--line);
  background: #ffffff;
  text-align: center;
  color: var(--muted);
}

.site-footer p {
  margin: 0;
}

.site-footer p:first-child {
  color: var(--teal);
  font-weight: 800;
  margin-bottom: 6px;
}

@keyframes notice-scroll {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(-50%);
  }
}

@media (max-width: 900px) {
  .hero {
    min-height: 590px;
    padding: 18px 22px 42px;
    background-position: 42% center;
  }

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

  .nav-links {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero-copy {
    margin-top: 72px;
  }

  .hero h1 {
    font-size: 44px;
  }

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

  .unit-layout {
    grid-template-columns: 1fr;
  }

  .unit-picker {
    position: static;
  }

  .unit-buttons {
    display: none;
  }

  .mobile-select-label {
    display: block;
    margin-bottom: 8px;
    color: var(--muted);
    font-weight: 700;
  }

  .unit-select {
    display: block;
    width: 100%;
    min-height: 46px;
    border: 1px solid var(--line);
    background: #ffffff;
    color: var(--ink);
    padding: 0 12px;
    border-radius: 8px;
  }

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

@media (max-width: 620px) {
  .hero {
    min-height: 560px;
    padding: 16px 16px 36px;
    background-position: 48% center;
  }

  .brand {
    font-size: 18px;
  }

  .nav-links a {
    min-width: 88px;
    padding: 0 10px;
  }

  .notice-strip {
    grid-template-columns: 88px 1fr;
  }

  .notice-label {
    font-size: 14px;
  }

  .notice-track {
    gap: 24px;
  }

  .hero-copy {
    margin-top: 56px;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero-text {
    font-size: 17px;
  }

  .hero-actions {
    display: grid;
  }

  .section {
    padding: 58px 16px 0;
  }

  .section-heading h2 {
    font-size: 27px;
  }

  .announcement-grid,
  .timeline,
  .member-list,
  .media-grid {
    grid-template-columns: 1fr;
  }

  .unit-detail {
    padding: 20px;
  }

  .unit-detail-head {
    display: block;
  }

  .unit-count {
    margin-top: 8px;
  }
}

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

  .notice-track {
    animation: none;
  }
}