:root {
  --blue: #005ca9;
  --blue-dark: #003f73;
  --blue-soft: #eaf3fb;
  --line: #d7e3ee;
  --text: #1d2730;
  --muted: #5e6c78;
  --bg: #ffffff;
  --panel: #f5f9fc;
  --max: 1160px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.72;
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.topline {
  background: #f1f5f8;
  border-bottom: 1px solid var(--line);
  color: #4c5d68;
  font-size: 13px;
}

.topline-inner,
.brandbar-inner,
.nav-inner,
.breadcrumb,
.page,
.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.topline-inner {
  min-height: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brandbar {
  background: #fff;
}

.brandbar-inner {
  min-height: 92px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.site-title {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--text);
}

.title-mark {
  width: 68px;
  height: 68px;
  border: 2px solid var(--blue);
  color: var(--blue);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 22px;
  letter-spacing: 0;
}

.site-title strong {
  display: block;
  font-size: 25px;
  line-height: 1.24;
  font-weight: 700;
}

.site-title span:last-child {
  display: block;
  color: var(--muted);
  font-size: 14px;
  margin-top: 4px;
}

.brand-meta {
  color: var(--blue-dark);
  text-align: right;
  font-weight: 600;
  line-height: 1.45;
}

.nav-wrap {
  background: var(--blue);
}

.nav-inner {
  display: flex;
  align-items: stretch;
  min-height: 48px;
}

.main-nav {
  display: flex;
  align-items: stretch;
  width: 100%;
}

.main-nav > a,
.dropdown > button {
  color: #fff;
  background: transparent;
  border: 0;
  padding: 0 18px;
  font: inherit;
  display: flex;
  align-items: center;
  cursor: pointer;
  white-space: nowrap;
}

.main-nav > a.active,
.main-nav > a:hover,
.dropdown:hover > button {
  background: var(--blue-dark);
  text-decoration: none;
}

.dropdown {
  position: relative;
  display: flex;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 12px 28px rgba(0, 40, 75, .14);
  display: none;
  z-index: 20;
}

.dropdown:hover .dropdown-menu {
  display: block;
}

.dropdown-menu a {
  display: block;
  padding: 11px 16px;
  color: var(--text);
  border-bottom: 1px solid #edf2f6;
}

.dropdown-menu a:hover {
  background: var(--blue-soft);
  color: var(--blue-dark);
  text-decoration: none;
}

.crumb-wrap {
  border-bottom: 1px solid var(--line);
  background: #f7fafc;
}

.breadcrumb {
  min-height: 42px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
}

.breadcrumb strong {
  color: var(--text);
}

.page {
  padding-top: 32px;
  padding-bottom: 56px;
}

.hero-poster {
  border: 1px solid var(--line);
  background: #fff;
  margin-bottom: 28px;
}

.hero-poster img {
  width: 100%;
}

.hero-video {
  border-top: 1px solid var(--line);
  background: #f8fbfd;
  padding: 18px;
}

.hero-video video {
  width: 100%;
  max-height: 420px;
  background: #000;
}

.full-width-video {
  width: 100%;
  max-width: none;
  margin-top: 18px;
  padding: 0;
  border-top: 0;
  background: transparent;
}

.full-width-video .tcplayer,
.full-width-video video {
  display: block;
  width: 100%;
  height: auto !important;
  max-height: none;
  aspect-ratio: 16 / 9;
  object-fit: contain;
}

.full-width-video .tcplayer video {
  width: 100% !important;
  height: 100% !important;
}

.full-width-video iframe {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  min-height: 420px;
  border: 0;
  background: #000;
}

.quick-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  margin: 22px 0 32px;
}

.quick-links a {
  padding: 16px 18px;
  border-right: 1px solid var(--line);
  color: var(--blue-dark);
  font-weight: 600;
  background: #fff;
}

.quick-links a:last-child {
  border-right: 0;
}

.quick-links a:hover {
  background: var(--blue-soft);
  text-decoration: none;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 34px;
  align-items: start;
}

.content h1 {
  color: var(--blue-dark);
  font-size: 34px;
  line-height: 1.25;
  margin: 0 0 18px;
  font-weight: 700;
}

.content h2 {
  color: var(--blue-dark);
  font-size: 25px;
  line-height: 1.35;
  margin: 36px 0 14px;
  padding-bottom: 9px;
  border-bottom: 2px solid var(--line);
}

.content h3 {
  color: #25384a;
  font-size: 19px;
  margin: 24px 0 8px;
}

.lead-box {
  background: var(--blue-soft);
  border-left: 5px solid var(--blue);
  padding: 22px 24px;
  margin: 0 0 28px;
  color: #23384a;
  font-size: 17px;
}

.info-table {
  border-top: 1px solid var(--line);
  margin: 18px 0 30px;
}

.info-row {
  display: grid;
  grid-template-columns: 170px 1fr;
  border-bottom: 1px solid var(--line);
}

.info-row strong {
  background: #f3f7fa;
  padding: 13px 16px;
  color: var(--blue-dark);
}

.info-row span,
.info-row div {
  padding: 13px 16px;
}

.aside {
  border-top: 4px solid var(--blue);
}

.aside-box {
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 0;
  padding: 20px;
  margin-bottom: 22px;
}

.aside-box h2 {
  font-size: 20px;
  color: var(--blue-dark);
  margin: 0 0 12px;
}

.side-nav a {
  display: block;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  color: var(--text);
}

.side-nav a:hover {
  color: var(--blue);
}

.logo-panel {
  display: grid;
  gap: 12px;
}

.logo-row {
  display: grid;
  gap: 12px;
}

.logo-row.one {
  grid-template-columns: 1fr;
}

.logo-row.two {
  grid-template-columns: repeat(2, 1fr);
}

.logo-row.three {
  grid-template-columns: repeat(3, 1fr);
}

.logo-row-compact {
  grid-template-columns: calc((100% - 12px) / 2);
}

.logo-feature-stack {
  display: grid;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--line);
  background: var(--blue-soft);
}

.logo-tile {
  height: 86px;
  border: 1px solid var(--line);
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
}

.logo-tile-wide {
  height: 108px;
}

.logo-tile img {
  max-width: 100%;
  max-height: 58px;
  object-fit: contain;
}

.logo-tile-wide img {
  max-height: 74px;
}

.program-card,
.speaker-card,
.download-card {
  border: 1px solid var(--line);
  background: #fff;
  margin-bottom: 16px;
}

.program-card header {
  background: var(--blue-soft);
  border-bottom: 1px solid var(--line);
  padding: 13px 16px;
  color: var(--blue-dark);
  font-weight: 700;
}

.program-card div {
  padding: 15px 16px;
}

.program-card p {
  margin: 7px 0;
}

.speaker-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.speaker-card {
  display: grid;
  grid-template-columns: 118px 1fr;
  gap: 15px;
  padding: 14px;
}

.speaker-card img {
  width: 118px;
  height: 148px;
  object-fit: cover;
  border: 1px solid var(--line);
}

.speaker-photo-placeholder {
  width: 118px;
  height: 148px;
  border: 1px solid var(--line);
  background: var(--blue-soft);
}

.speaker-card h3 {
  margin-top: 0;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.gallery figure {
  margin: 0;
  border: 1px solid var(--line);
  background: #fff;
  display: flex;
  flex-direction: column;
}

.gallery-link {
  display: block;
  height: 320px;
  background: #fff;
}

.gallery-link img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.gallery figcaption {
  padding: 10px 12px;
  color: var(--muted);
  font-size: 14px;
}

.download-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 18px;
  color: var(--text);
}

.download-card:hover {
  background: var(--blue-soft);
  text-decoration: none;
}

.download-badge {
  width: 64px;
  height: 64px;
  background: var(--blue);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.notice {
  background: #fff9e8;
  border: 1px solid #ecd79a;
  padding: 16px 18px;
  margin: 20px 0;
}

.sponsor-inquiry {
  border-top: 1px solid var(--line);
  background: var(--blue-soft);
}

.sponsor-inquiry-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 30px 24px 32px;
}

.sponsor-inquiry-kicker {
  display: block;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  margin-bottom: 5px;
}

.sponsor-inquiry h2 {
  margin: 0 0 8px;
  color: var(--blue-dark);
  font-size: 25px;
  line-height: 1.35;
}

.sponsor-inquiry p {
  max-width: 820px;
  margin: 0 0 12px;
  color: #314a5d;
}

.sponsor-inquiry-email {
  font-weight: 700;
  font-size: 17px;
}

.sponsors {
  border-top: 1px solid var(--line);
  background: #f7fafc;
}

.sponsors-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 30px 24px 34px;
}

.sponsors h2 {
  margin: 0 0 18px;
  color: var(--blue-dark);
  font-size: 22px;
  line-height: 1.35;
  border-bottom: 2px solid var(--line);
  padding-bottom: 9px;
}

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

.sponsor-card {
  min-height: 150px;
  border: 1px solid var(--line);
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 22px;
}

.sponsor-card img {
  max-width: 100%;
  max-height: 105px;
  object-fit: contain;
}


.footer {
  background: #2d363d;
  color: #d8e0e6;
}

.footer-inner {
  min-height: 112px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  font-size: 14px;
}

.footer a {
  color: #fff;
}

@media (max-width: 860px) {
  .brandbar-inner,
  .topline-inner,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    padding-top: 16px;
    padding-bottom: 16px;
  }

  .brand-meta {
    text-align: left;
  }

  .main-nav {
    flex-wrap: wrap;
  }

  .main-nav > a,
  .dropdown > button {
    min-height: 46px;
    padding: 0 13px;
  }

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

  .quick-links,
  .speaker-grid,
  .gallery,
  .sponsor-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .info-row,
  .speaker-card {
    grid-template-columns: 1fr;
  }

  .full-width-video iframe {
    min-height: 0;
  }

  .speaker-card img {
    width: 100%;
    height: auto;
    max-height: 360px;
  }
}

@media (max-width: 540px) {
  .topline-inner,
  .brandbar-inner,
  .nav-inner,
  .breadcrumb,
  .page,
  .footer-inner {
    padding-left: 16px;
    padding-right: 16px;
  }

  .site-title {
    align-items: flex-start;
  }

  .title-mark {
    width: 56px;
    height: 56px;
    font-size: 18px;
  }

  .site-title strong {
    font-size: 20px;
  }

  .content h1 {
    font-size: 27px;
  }

  .logo-row.two,
  .logo-row.three {
    grid-template-columns: 1fr;
  }
}


.map-preview {
  display: block;
  margin: 8px 0 14px;
  border: 1px solid var(--line);
  background: #fff;
  overflow: hidden;
  color: var(--blue-dark);
}

.map-preview img {
  display: block;
  width: 100%;
  height: 180px;
  object-fit: cover;
  object-position: center;
  background: var(--blue-soft);
}

.map-preview span {
  display: block;
  padding: 9px 12px;
  font-weight: 700;
  border-top: 1px solid var(--line);
}

.map-preview:hover {
  background: var(--blue-soft);
  text-decoration: none;
}

.overview-map {
  display: block;
  margin: 0 0 18px;
  border: 1px solid var(--line);
  background: #fff;
  overflow: hidden;
  color: var(--blue-dark);
}

.overview-map img {
  display: block;
  width: 100%;
  height: auto;
}

.overview-map span {
  display: block;
  padding: 10px 12px;
  font-weight: 700;
  border-top: 1px solid var(--line);
}

.overview-map:hover {
  background: var(--blue-soft);
  text-decoration: none;
}

.registration-image {
  display: block;
  margin: 18px 0 6px;
  border: 1px solid var(--line);
  background: #fff;
  overflow: hidden;
  color: var(--blue-dark);
}

.registration-image img {
  display: block;
  width: 100%;
  max-width: 420px;
  height: auto;
  margin: 0 auto;
}

.registration-image span {
  display: block;
  padding: 10px 12px;
  font-weight: 700;
  border-top: 1px solid var(--line);
}

.registration-image:hover {
  background: var(--blue-soft);
  text-decoration: none;
}