:root {
  --deep: #03113c;
  --navy: #052264;
  --blue: #086fff;
  --sky: #19c7ff;
  --cyan: #35f2ff;
  --violet: #5d63ff;
  --paper: rgba(244, 251, 255, 0.92);
  --text: #102143;
  --soft: #5e7194;
  --line: rgba(63, 191, 255, 0.28);
  --glass: rgba(7, 35, 96, 0.66);
  --glass-strong: rgba(6, 42, 117, 0.82);
  --white: #f7fcff;
  --container: min(1180px, calc(100vw - 48px));
  --shadow: 0 28px 90px rgba(0, 42, 134, 0.24);
  --font: "HarmonyOS Sans SC", "MiSans", "Alibaba PuHuiTi", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  font-family: var(--font);
  line-height: 1.76;
  background:
    radial-gradient(circle at 14% 0%, rgba(29, 184, 255, 0.38), transparent 28rem),
    radial-gradient(circle at 88% 5%, rgba(70, 238, 255, 0.28), transparent 30rem),
    linear-gradient(145deg, #06133a 0%, #073b9d 50%, #0aa9f0 100%);
  overflow-x: hidden;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -4;
  pointer-events: none;
  content: "";
  background:
    linear-gradient(rgba(122, 220, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122, 220, 255, 0.08) 1px, transparent 1px),
    repeating-linear-gradient(112deg, transparent 0 44px, rgba(122, 220, 255, 0.08) 45px, transparent 47px);
  background-size: 70px 70px, 70px 70px, auto;
  mask-image: linear-gradient(to bottom, transparent, #000 7%, #000 92%, transparent);
}

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

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

#tech-canvas {
  position: fixed;
  inset: 0;
  z-index: -3;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
}

.page-light {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
}

.page-light::before,
.page-light::after {
  position: absolute;
  content: "";
  pointer-events: none;
}

.page-light::before {
  left: -20vw;
  top: 28vh;
  width: 140vw;
  height: 180px;
  opacity: 0.2;
  background: linear-gradient(90deg, transparent, rgba(116, 239, 255, 0.62), transparent);
  filter: blur(28px);
  transform: rotate(-9deg);
  animation: ribbonFlow 10s ease-in-out infinite;
}

.page-light::after {
  right: -12vw;
  top: 12vh;
  width: 34vw;
  height: 68vh;
  opacity: 0.18;
  background:
    linear-gradient(90deg, rgba(53, 242, 255, 0.38), transparent 14%),
    linear-gradient(90deg, transparent 44%, rgba(53, 242, 255, 0.28) 45%, transparent 47%),
    linear-gradient(90deg, transparent 72%, rgba(53, 242, 255, 0.22) 73%, transparent 75%);
  filter: blur(10px);
  animation: skylinePulse 8s ease-in-out infinite;
}

.page-light span {
  position: absolute;
  display: block;
  opacity: 0.38;
  filter: blur(18px);
  transform: rotate(18deg);
  animation: lightMove 12s ease-in-out infinite;
}

.page-light span:nth-child(1) {
  left: 8vw;
  top: -18vh;
  width: 2px;
  height: 145vh;
  background: linear-gradient(to bottom, transparent, var(--cyan), transparent);
}

.page-light span:nth-child(2) {
  right: 15vw;
  top: -14vh;
  width: 2px;
  height: 130vh;
  background: linear-gradient(to bottom, transparent, #7df8ff, transparent);
  animation-delay: -5s;
}

.page-light span:nth-child(3) {
  left: 0;
  right: 0;
  bottom: -10vh;
  height: 34vh;
  opacity: 0.25;
  background: radial-gradient(ellipse at 50% 100%, rgba(54, 240, 255, 0.72), transparent 62%);
  filter: blur(26px);
  transform: none;
  animation: glowPulse 6s ease-in-out infinite;
}

.skip-link {
  position: fixed;
  left: 18px;
  top: 16px;
  z-index: 100;
  padding: 8px 14px;
  color: #041c4d;
  background: var(--cyan);
  transform: translateY(-150%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: var(--container);
  margin: 18px auto 0;
  padding: 12px 16px;
  border: 1px solid rgba(184, 235, 255, 0.26);
  color: white;
  background: rgba(4, 18, 59, 0.76);
  box-shadow: 0 18px 60px rgba(0, 27, 91, 0.25);
  backdrop-filter: blur(16px);
  border-radius: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand span {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  flex: 0 0 auto;
  color: white;
  font-size: 18px;
  font-weight: 900;
  font-style: italic;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  border-radius: 12px;
  box-shadow: 0 0 24px rgba(53, 242, 255, 0.45);
}

.brand strong {
  overflow: hidden;
  font-size: 16px;
  font-weight: 850;
  letter-spacing: 0.02em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-header nav {
  display: flex;
  gap: 6px;
  align-items: center;
  flex: 0 0 auto;
}

.site-header nav a {
  padding: 8px 12px;
  color: #d7f3ff;
  font-size: 14px;
  transition: color 0.2s ease, background 0.2s ease;
}

.site-header nav a:hover,
.site-header nav a:focus-visible {
  color: white;
  background: rgba(82, 207, 255, 0.16);
  outline: none;
}

.register-float,
.hero-register {
  position: fixed;
  z-index: 35;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 12px 22px;
  border: 1px solid rgba(255, 245, 194, 0.72);
  color: #fffaf0;
  font-weight: 900;
  letter-spacing: 0.06em;
  background:
    linear-gradient(135deg, rgba(255, 132, 36, 0.92), rgba(255, 193, 65, 0.82)),
    rgba(255, 255, 255, 0.16);
  border-radius: 18px;
  box-shadow: 0 18px 52px rgba(255, 128, 23, 0.42), inset 0 1px 0 rgba(255, 255, 255, 0.42);
  backdrop-filter: blur(18px) saturate(1.35);
  transition: transform 0.22s ease, box-shadow 0.22s ease, filter 0.22s ease;
}

.register-float {
  left: 50%;
  bottom: 24px;
  width: min(720px, calc(100vw - 56px));
  min-height: 58px;
  transform: translateX(-50%);
}

.register-float span {
  font-size: 20px;
}

.register-float small {
  color: rgba(255, 255, 255, 0.88);
  font-size: 14px;
  font-weight: 760;
  letter-spacing: 0;
}

.hero-register {
  position: static;
  width: min(320px, 100%);
  min-height: 54px;
  margin-top: 22px;
  font-size: 18px;
}

.register-float:hover,
.register-float:focus-visible,
.hero-register:hover,
.hero-register:focus-visible {
  filter: brightness(1.06);
  box-shadow: 0 24px 68px rgba(255, 128, 23, 0.50), inset 0 1px 0 rgba(255, 255, 255, 0.48);
  outline: none;
}

.register-float:hover,
.register-float:focus-visible {
  transform: translateX(-50%) translateY(-3px);
}

main {
  width: var(--container);
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(320px, 0.42fr) minmax(520px, 0.58fr);
  gap: 32px;
  align-items: center;
  min-height: calc(100vh - 92px);
  padding: 54px 0 80px;
  color: white;
}

.hero-copy {
  position: relative;
  padding: 34px 32px;
  border: 1px solid rgba(175, 236, 255, 0.24);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.13), rgba(255, 255, 255, 0.035)), rgba(4, 24, 78, 0.66);
  box-shadow: var(--shadow);
  backdrop-filter: blur(15px);
  border-radius: 22px;
}

.hero-copy::before,
.hero-poster::before,
.content-section::before {
  position: absolute;
  right: 24px;
  top: 22px;
  width: 112px;
  height: 5px;
  content: "";
  background: linear-gradient(90deg, var(--cyan), transparent);
  box-shadow: 0 0 18px rgba(53, 242, 255, 0.68);
}

.hero-date {
  margin: 0 0 12px;
  color: var(--cyan);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(34px, 3.5vw, 54px);
  font-weight: 950;
  line-height: 1.15;
  letter-spacing: -0.04em;
}

.hero-copy > p:last-of-type {
  margin: 12px 0 0;
  color: #d8f2ff;
  font-size: clamp(22px, 2.2vw, 32px);
  font-weight: 850;
}

.hero-facts {
  display: grid;
  gap: 10px;
  margin-top: 28px;
}

.hero-facts span {
  display: block;
  padding: 12px 14px;
  border-left: 3px solid var(--cyan);
  color: #e9f9ff;
  font-weight: 760;
  background: linear-gradient(90deg, rgba(53, 242, 255, 0.16), rgba(255, 255, 255, 0.04));
}

.hero-poster {
  position: relative;
  margin: 0;
  padding: 12px;
  border: 1px solid rgba(176, 235, 255, 0.25);
  background: rgba(6, 40, 106, 0.56);
  box-shadow: var(--shadow), 0 0 45px rgba(42, 214, 255, 0.18);
  overflow: hidden;
  border-radius: 22px;
}

.hero-poster::after {
  position: absolute;
  inset: 12px;
  content: "";
  pointer-events: none;
  background: linear-gradient(108deg, transparent 0 42%, rgba(255, 255, 255, 0.28) 48%, transparent 54% 100%);
  transform: translateX(-120%);
  animation: posterSweep 7s ease-in-out infinite;
}

.hero-poster img {
  width: 100%;
  border-radius: 14px;
}

.content-section {
  position: relative;
  margin: 0 0 28px;
  padding: clamp(26px, 4vw, 46px);
  border: 1px solid rgba(187, 237, 255, 0.20);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.95), rgba(221, 244, 255, 0.90)),
    rgba(255, 255, 255, 0.88);
  box-shadow: 0 22px 70px rgba(1, 24, 88, 0.18);
  overflow: hidden;
  border-radius: 22px;
}

.content-section::before {
  opacity: 0.48;
}

.section-title {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.section-title span {
  display: inline-grid;
  width: 44px;
  height: 44px;
  place-items: center;
  color: white;
  font-weight: 900;
  background: linear-gradient(135deg, var(--blue), var(--sky));
  border-radius: 12px;
  box-shadow: 0 12px 30px rgba(8, 111, 255, 0.24);
}

.section-title h2 {
  margin: 0;
  color: #09296d;
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.article-card,
.theme-card,
.list-panel,
.register-panel,
.agenda-wrap {
  position: relative;
  z-index: 1;
}

.article-card {
  display: grid;
  gap: 16px;
  color: #17345d;
  font-size: 17px;
}

.article-card p,
.list-panel p,
.register-panel p {
  margin: 0;
}

.theme-card {
  padding: 26px 30px;
  color: white;
  background:
    linear-gradient(100deg, rgba(93, 99, 255, 0.95), rgba(8, 111, 255, 0.88), rgba(35, 223, 255, 0.70)),
    #075fe8;
  box-shadow: inset 0 0 38px rgba(255, 255, 255, 0.12), 0 20px 54px rgba(8, 111, 255, 0.26);
  border-radius: 18px;
}

.theme-card p {
  margin: 0;
  font-size: clamp(28px, 4vw, 52px);
  font-weight: 950;
  line-height: 1.2;
}

.unit-grid,
.info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.unit-grid article,
.info-grid article {
  min-height: 150px;
  padding: 22px;
  border: 1px solid rgba(8, 111, 255, 0.13);
  background: linear-gradient(145deg, #ffffff, #eaf7ff);
  border-radius: 18px;
}

.unit-grid span,
.info-grid span {
  display: block;
  margin-bottom: 12px;
  color: #0871e7;
  font-size: 14px;
  font-weight: 900;
}

.unit-grid p,
.info-grid strong {
  margin: 0;
  color: #102b5a;
  font-size: 18px;
  font-weight: 850;
  line-height: 1.5;
}

.info-grid p {
  margin: 10px 0 0;
  color: var(--soft);
}

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

.list-panel p {
  position: relative;
  padding: 15px 16px 15px 46px;
  color: #15335f;
  background: linear-gradient(90deg, rgba(8, 111, 255, 0.10), rgba(25, 199, 255, 0.05));
  border-radius: 14px;
}

.list-panel p::before {
  position: absolute;
  left: 18px;
  top: 24px;
  width: 9px;
  height: 9px;
  content: "";
  background: var(--sky);
  box-shadow: 0 0 16px rgba(25, 199, 255, 0.68);
}

.register-panel {
  display: grid;
  gap: 10px;
  padding: 24px;
  color: #14335f;
  background: linear-gradient(145deg, rgba(8, 111, 255, 0.10), rgba(25, 199, 255, 0.05));
  border-radius: 18px;
}

.register-panel a {
  color: #075fe8;
  font-weight: 850;
}

.agenda-section {
  padding-bottom: 34px;
}

.agenda-wrap {
  overflow: hidden;
  border: 1px solid rgba(8, 111, 255, 0.16);
  background: white;
  border-radius: 18px;
}

.agenda-table {
  width: 100%;
  border-collapse: collapse;
  color: #14335f;
  font-size: 15px;
}

.agenda-table th,
.agenda-table td {
  padding: 15px 16px;
  border: 1px solid rgba(8, 111, 255, 0.13);
  text-align: left;
  vertical-align: top;
}

.agenda-table thead th {
  color: white;
  font-weight: 900;
  background: linear-gradient(135deg, #075fe8, #16bdf5);
}

.agenda-table td:first-child {
  width: 128px;
  color: #17345d;
  white-space: nowrap;
}

.agenda-table td:nth-child(2) {
  width: 150px;
  font-weight: 900;
}

.agenda-table td:nth-child(3) {
  width: 170px;
}

.day-row th {
  color: #07285c;
  font-size: 16px;
  font-weight: 950;
  background: linear-gradient(90deg, #c8f6ff, #7fe1ff);
}

.day-row.soft th {
  color: white;
  background: linear-gradient(90deg, #4768ff, #17bff6);
}

.host-row td {
  color: #0c5dc8;
  font-weight: 850;
  background: #eff9ff;
}

.break-row td {
  color: #805d00;
  font-weight: 900;
  text-align: center;
  background: #fff5cf;
}

.agenda-mobile {
  display: none;
}

.agenda-note {
  margin: 0;
  padding: 14px 18px 18px;
  color: #607493;
  font-size: 14px;
  border-top: 1px solid rgba(8, 111, 255, 0.10);
  background: #f8fdff;
}

.site-footer {
  width: var(--container);
  margin: 0 auto;
  padding: 24px 0 86px;
  color: #d9f4ff;
  text-align: center;
}

.site-footer p {
  margin: 0;
}

@keyframes posterSweep {
  0%,
  48% {
    transform: translateX(-125%);
  }
  68%,
  100% {
    transform: translateX(125%);
  }
}

@keyframes lightMove {
  0%,
  100% {
    transform: translate3d(0, -3vh, 0) rotate(18deg);
  }
  50% {
    transform: translate3d(4vw, 3vh, 0) rotate(18deg);
  }
}

@keyframes glowPulse {
  0%,
  100% {
    opacity: 0.22;
  }
  50% {
    opacity: 0.34;
  }
}

@keyframes ribbonFlow {
  0%,
  100% {
    transform: translate3d(-6vw, 0, 0) rotate(-9deg);
    opacity: 0.15;
  }
  50% {
    transform: translate3d(8vw, -3vh, 0) rotate(-9deg);
    opacity: 0.28;
  }
}

@keyframes skylinePulse {
  0%,
  100% {
    transform: translateY(0) scaleY(1);
    opacity: 0.14;
  }
  50% {
    transform: translateY(-16px) scaleY(1.05);
    opacity: 0.24;
  }
}

@media (max-width: 980px) {
  :root {
    --container: min(100vw - 30px, 760px);
  }

  .site-header nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 36px;
  }

  .hero-poster {
    order: -1;
  }

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

@media (max-width: 720px) {
  :root {
    --container: min(100vw - 22px, 560px);
  }

  body {
    padding-bottom: 74px;
  }

  .site-header {
    margin-top: 10px;
  }

  .brand strong {
    font-size: 14px;
  }

  .register-float {
    left: 12px;
    right: 12px;
    bottom: 12px;
    width: auto;
    min-height: 54px;
    transform: none;
    border-radius: 16px;
  }

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

  .register-float small {
    display: none;
  }

  .register-float span {
    font-size: 18px;
  }

  .hero-register {
    display: none;
  }

  .hero {
    gap: 18px;
    padding: 24px 0 34px;
  }

  .hero-copy,
  .content-section {
    padding: 22px;
    border-radius: 18px;
  }

  .hero h1 {
    font-size: clamp(30px, 9vw, 42px);
  }

  .hero-copy > p:last-of-type {
    font-size: 21px;
  }

  .section-title {
    gap: 12px;
  }

  .section-title span {
    width: 38px;
    height: 38px;
  }

  .section-title h2 {
    font-size: 28px;
  }

  .article-card {
    font-size: 15px;
  }

  .theme-card {
    padding: 20px;
  }

  .theme-card p {
    font-size: 28px;
  }

  .agenda-table {
    display: none;
  }

  .agenda-mobile {
    display: grid;
    gap: 14px;
    padding: 14px;
    background: #f8fdff;
  }

  .mobile-day {
    padding: 16px;
    border: 1px solid rgba(8, 111, 255, 0.12);
    background: white;
    border-radius: 16px;
  }

  .mobile-day h3 {
    margin: 0 0 8px;
    color: #082b6c;
    font-size: 21px;
  }

  .mobile-day p {
    margin: 0 0 12px;
    color: var(--soft);
    font-size: 14px;
  }

  .mobile-day dl {
    display: grid;
    gap: 10px;
    margin: 0;
  }

  .mobile-day dt {
    color: #0871e7;
    font-weight: 900;
  }

  .mobile-day dd {
    margin: -8px 0 0;
    padding: 10px 12px;
    color: #183964;
    background: #edf8ff;
  }

  .mobile-day strong,
  .mobile-day span {
    display: block;
  }

  .mobile-day span {
    margin-top: 4px;
    color: var(--soft);
    font-size: 13px;
  }

  .site-footer {
    padding-bottom: 94px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}