:root {
  --heading-color: #14364a;
  --accent-color: #0f8b8d;
  --nav-dropdown-hover-color: #0f8b8d;
}

.dark-background {
  --background-color: #071a28;
  --surface-color: #0d2d42;
}

.header .logo img {
  max-height: 46px;
  margin-right: 0;
}

.header .cta-btn,
.header .cta-btn:focus {
  background: linear-gradient(135deg, #0f8b8d, #23b6a9);
}

.hero {
  min-height: 100vh;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 18%, rgba(52, 211, 153, 0.2), transparent 30%),
    radial-gradient(circle at 82% 24%, rgba(14, 165, 233, 0.18), transparent 30%),
    radial-gradient(circle at 70% 80%, rgba(15, 139, 141, 0.22), transparent 35%),
    linear-gradient(180deg, #071a28 0%, #0b2232 58%, #102f42 100%);
}

.hero-backdrop {
  position: absolute;
  inset: 0;
  opacity: 0.8;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95), rgba(0, 0, 0, 0.35));
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero-kicker {
  margin: 0 0 14px;
  color: rgba(255, 255, 255, 0.78);
  font-family: var(--heading-font);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero h2 {
  max-width: 1040px;
  font-size: 58px;
  line-height: 1.08;
}

.hero h2 span {
  color: #4fe1d5;
}

.hero-meta {
  max-width: 720px;
  margin: 18px auto 0;
  font-size: 21px;
  color: rgba(255, 255, 255, 0.86);
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 32px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn-primary-hero,
.btn-secondary-hero {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 170px;
  padding: 13px 22px;
  border-radius: 999px;
  font-family: var(--heading-font);
  font-weight: 700;
  transition: 0.3s ease;
}

.btn-primary-hero {
  background: linear-gradient(135deg, #0f8b8d, #23b6a9);
  color: #ffffff;
  box-shadow: 0 18px 40px rgba(15, 139, 141, 0.28);
}

.btn-primary-hero:hover {
  color: #ffffff;
  transform: translateY(-2px);
}

.btn-secondary-hero {
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #ffffff;
  background: rgba(255, 255, 255, 0.05);
}

.btn-secondary-hero:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.12);
}

.hero .about-info {
  background: rgba(8, 23, 36, 0.72);
  backdrop-filter: blur(12px);
}

.content-card,
.person-card,
.date-card,
.venue-placeholder {
  height: 100%;
  padding: 28px 30px;
  border-radius: 22px;
  background: #ffffff;
  box-shadow: 0 20px 55px rgba(17, 39, 54, 0.08);
}

.content-card {
  margin-bottom: 24px;
}

.content-card h3,
.date-card h3,
.venue-placeholder h3 {
  margin-bottom: 14px;
}

.topic-list,
.simple-list {
  padding-left: 20px;
  margin-bottom: 0;
}

.topic-list li,
.simple-list li {
  margin-bottom: 12px;
}

.date-card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, #ffffff 0%, #f5fbfb 100%);
}

.date-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 90px;
  height: 90px;
  background: radial-gradient(circle, rgba(15, 139, 141, 0.18), transparent 72%);
}

.date-label,
.venue-badge {
  display: inline-block;
  margin-bottom: 14px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(15, 139, 141, 0.1);
  color: #0f6e73;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.person-card {
  border: 1px solid rgba(15, 139, 141, 0.08);
  text-align: center;
}

#organizers {
  --default-color: #2f3138;
  --heading-color: #14364a;
}

.person-photo {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: center top;
  margin-bottom: 18px;
  border-radius: 16px;
}

.person-photo-hao {
  object-position: center 16%;
}

.person-photo-marinka {
  object-position: center 42%;
}

.person-photo-yong {
  object-position: center 40%;
}

.person-photo-jindong {
  width: 70%;
  height: auto;
  aspect-ratio: auto;
  max-height: 260px;
  object-fit: contain;
  object-position: center center;
  margin-left: auto;
  margin-right: auto;
  background: transparent;
}

.person-photo-xia {
  object-position: center 18%;
}

.person-photo-xing {
  object-position: center 14%;
}

.person-card h4 {
  margin-bottom: 8px;
  font-size: 24px;
}

.person-card p {
  margin: 0;
  color: color-mix(in srgb, var(--default-color), transparent 18%);
}

#organizers .person-affiliation {
  margin-top: 10px;
  font-size: 16px;
  line-height: 1.5;
  color: #14364a !important;
  opacity: 1 !important;
  visibility: visible !important;
  position: relative;
  z-index: 2;
  mix-blend-mode: normal;
}

.person-links {
  display: flex;
  justify-content: center;
  margin-bottom: 16px;
}

.scholar-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: 999px;
  background: rgba(15, 139, 141, 0.08);
  color: #0f6e73;
  font-weight: 600;
}

.scholar-link:hover {
  color: #0b5a5f;
  background: rgba(15, 139, 141, 0.14);
}

.panel-card {
  margin-bottom: 24px;
}

.panel-theme {
  margin-bottom: 12px;
  font-family: var(--heading-font);
  font-size: 28px;
  font-weight: 800;
  color: var(--heading-color);
}

.committee-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 28px;
}

.committee-grid div {
  position: relative;
  padding-left: 18px;
  line-height: 1.6;
}

.committee-grid div::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #0f8b8d;
}

.schedule-shell {
  background: #ffffff;
  border-radius: 24px;
  padding: 24px 28px;
  box-shadow: 0 20px 55px rgba(17, 39, 54, 0.08);
}

.schedule .schedule-item {
  padding: 24px 0;
}

.schedule .schedule-item:first-child {
  padding-top: 0;
}

.schedule .schedule-item:last-child {
  padding-bottom: 0;
}

.venue-placeholder {
  min-height: 100%;
  display: flex;
  align-items: center;
  background:
    radial-gradient(circle at top left, rgba(79, 225, 213, 0.18), transparent 35%),
    linear-gradient(180deg, #0c2434 0%, #12374e 100%);
  color: #ffffff;
}

.venue-placeholder h3,
.venue-placeholder p {
  color: #ffffff;
}

.venue-copy {
  min-height: 100%;
}

.faq .faq-container .faq-item h3 {
  padding-right: 42px;
}

.contact .info-item {
  min-height: 240px;
  border-radius: 22px;
  box-shadow: 0 20px 55px rgba(17, 39, 54, 0.08);
}

.contact .info-item p {
  margin-bottom: 8px;
  text-align: center;
}

@media (max-width: 1199px) {
  .hero h2 {
    font-size: 48px;
  }
}

@media (max-width: 991px) {
  .committee-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 767px) {
  .hero {
    min-height: auto;
    padding-top: 140px;
  }

  .hero h2 {
    font-size: 38px;
  }

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

  .content-card,
  .person-card,
  .date-card,
  .venue-placeholder,
  .schedule-shell {
    padding: 22px 20px;
  }

  .hero-actions {
    width: 100%;
  }

  .btn-primary-hero,
  .btn-secondary-hero {
    width: 100%;
  }
}