:root {
  --bg: #0b1028;
  --panel: rgba(255,255,255,.09);
  --panel-strong: rgba(255,255,255,.14);
  --text: #f7f8ff;
  --muted: #c8d0f0;
  --cyan: #38d6ff;
  --violet: #9a6cff;
  --pink: #ff5ec4;
  --ink: #132043;
}
* { box-sizing: border-box; }
html { scroll-behavior: auto; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 10%, rgba(83, 97, 255, .42), transparent 30%),
    radial-gradient(circle at 88% 20%, rgba(255, 94, 196, .26), transparent 26%),
    linear-gradient(135deg, #081331 0%, #241153 48%, #07172c 100%);
  line-height: 1.75;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.9), transparent 76%);
}
a { color: inherit; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 4vw;
  background: rgba(8, 13, 36, .78);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; min-width: 0; }
.brand > span:last-child { max-width: 300px; line-height: 1.35; }
html:lang(en) .brand > span:last-child { display: none; }
.brand-mark { display: grid; place-items: center; width: 58px; height: 34px; border: 1px solid rgba(255,255,255,.24); border-radius: 6px; color: var(--cyan); }
.nav {
  display: flex;
  flex-wrap: nowrap;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
  font-size: 15px;
}
.nav a { text-decoration: none; color: #edf1ff; opacity: .94; }
.nav-link,
.nav .language-toggle {
  width: auto;
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  border: 1px solid rgba(255,255,255,.34);
  border-radius: 999px;
  color: #fff;
  background: rgba(255,255,255,.1);
  font-weight: 800;
  cursor: pointer;
  white-space: nowrap;
}
.nav-link:hover,
.nav-item:hover .nav-link {
  color: var(--cyan);
  background: rgba(255,255,255,.08);
  transform: translateY(-2px);
}
.nav-item {
  position: relative;
}
.nav-note {
  position: relative;
}
.nav-tooltip {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  z-index: 30;
  width: max-content;
  max-width: 230px;
  padding: 9px 12px;
  border-radius: 8px;
  color: #07142d;
  background: linear-gradient(90deg, var(--cyan), #c2a7ff);
  box-shadow: 0 18px 46px rgba(0,0,0,.3);
  font-size: 13px;
  font-weight: 900;
  line-height: 1.35;
  white-space: normal;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 6px);
  transition: opacity .18s ease, transform .18s ease;
}
.nav-note:hover .nav-tooltip,
.nav-note:focus-within .nav-tooltip {
  opacity: 1;
  transform: translate(-50%, 0);
}
.dropdown {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  min-width: 168px;
  padding: 10px;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 8px;
  background: rgba(9, 15, 42, .96);
  box-shadow: 0 24px 70px rgba(0,0,0,.34);
  backdrop-filter: blur(18px);
  transform: translate(-50%, 8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
}
.dropdown::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -12px;
  height: 12px;
}
.nav-item:hover .dropdown,
.nav-item:focus-within .dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, 0);
}
.dropdown a {
  display: block;
  padding: 8px 10px;
  border-radius: 6px;
  color: #edf1ff;
  font-size: 14px;
}
.dropdown a:hover {
  color: #081331;
  background: linear-gradient(90deg, var(--cyan), #b9a0ff);
}
.nav .lang { padding: 4px 10px; border: 1px solid rgba(255,255,255,.28); border-radius: 999px; }
.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, .62fr);
  align-items: center;
  gap: 48px;
  padding: 76px 5vw 64px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 8% 46% auto auto;
  width: 540px;
  height: 540px;
  border: 1px solid rgba(56,214,255,.24);
  border-radius: 50%;
  box-shadow:
    inset 0 0 0 72px rgba(154,108,255,.04),
    inset 0 0 0 144px rgba(56,214,255,.035),
    0 0 90px rgba(56,214,255,.16);
  animation: slow-spin 26s linear infinite;
}
.hero-glow {
  position: absolute;
  inset: auto -12% -24% 40%;
  height: 460px;
  background: linear-gradient(90deg, rgba(56,214,255,.28), rgba(154,108,255,.32), rgba(255,94,196,.22));
  filter: blur(60px);
  transform: rotate(-8deg);
}
.science-field {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.science-field::before,
.science-field::after {
  content: "";
  position: absolute;
  width: 520px;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(56,214,255,.75), rgba(255,94,196,.55), transparent);
  transform-origin: left center;
}
.science-field::before { left: 6%; top: 32%; transform: rotate(18deg); }
.science-field::after { right: 4%; bottom: 23%; transform: rotate(-24deg); }
.science-field span {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 22px var(--cyan), 0 0 46px rgba(154,108,255,.55);
  animation: pulse 3.4s ease-in-out infinite;
}
.science-field span:nth-child(1) { left: 11%; top: 28%; }
.science-field span:nth-child(2) { left: 35%; top: 37%; animation-delay: .4s; }
.science-field span:nth-child(3) { left: 52%; top: 21%; animation-delay: .8s; }
.science-field span:nth-child(4) { right: 19%; top: 32%; animation-delay: 1.2s; }
.science-field span:nth-child(5) { right: 11%; bottom: 24%; animation-delay: 1.6s; }
.science-field span:nth-child(6) { left: 25%; bottom: 18%; animation-delay: 2s; }
.hero-copy { position: relative; max-width: 820px; animation: slide-up .8s ease both; }
.eyebrow { margin: 0 0 12px; color: var(--cyan); text-transform: uppercase; letter-spacing: 0; font-weight: 700; }
h1 { margin: 0; font-size: clamp(42px, 7vw, 88px); line-height: 1.05; letter-spacing: 0; }
html:lang(en) h1 { font-size: clamp(36px, 5.4vw, 70px); line-height: 1.12; overflow-wrap: anywhere; }
.conference-slogan {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  margin: 20px 0 0;
  font-size: clamp(23px, 3vw, 36px);
  font-weight: 850;
  line-height: 1.25;
  color: #f8fbff;
  letter-spacing: .07em;
}
.conference-slogan::before {
  content: "";
  width: 64px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56,214,255,.82));
}
html:lang(en) .conference-slogan {
  font-size: clamp(20px, 2.35vw, 30px);
  letter-spacing: .02em;
}
h2 { margin: 0; font-size: clamp(30px, 4vw, 52px); line-height: 1.18; letter-spacing: 0; }
html:lang(en) h2 { font-size: clamp(28px, 3.5vw, 46px); overflow-wrap: anywhere; }
h3 { margin: 0 0 12px; line-height: 1.35; }
.lead { max-width: 680px; margin: 24px 0; font-size: 20px; color: var(--muted); }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin: 28px 0; }
.btn { padding: 12px 22px; border-radius: 6px; text-decoration: none; font-weight: 700; border: 1px solid rgba(255,255,255,.24); }
.btn.primary { color: #09142f; background: linear-gradient(90deg, var(--cyan), #b9a0ff); border: 0; }
.btn.ghost { background: rgba(255,255,255,.08); }
.btn:hover { transform: translateY(-4px); box-shadow: 0 16px 38px rgba(56,214,255,.22); }
.hero-side {
  position: relative;
  display: grid;
  gap: 18px;
  align-self: center;
}
.quick-actions {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: nowrap;
  width: min(520px, 100%);
  justify-self: center;
  margin: 4px auto 0;
  padding: 12px;
  border-radius: 8px;
  background: rgba(8, 18, 44, .42);
  border: 1px solid rgba(255,255,255,.14);
  backdrop-filter: blur(16px);
  box-shadow: 0 18px 46px rgba(0,0,0,.22);
}
.quick-action {
  min-height: 58px;
  flex: 1 1 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 14px;
  border-radius: 6px;
  color: #f7fbff;
  text-decoration: none;
  font-weight: 900;
  font-size: 16px;
  text-align: center;
  white-space: nowrap;
  background: linear-gradient(135deg, rgba(43,80,180,.72), rgba(91,55,170,.68));
  border: 1px solid rgba(170,190,255,.32);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.2), 0 12px 30px rgba(28,52,140,.22);
  transition: transform .2s ease, border-color .2s ease, background .2s ease, box-shadow .2s ease;
}
.quick-action::after {
  content: "›";
  margin-left: 6px;
  color: var(--cyan);
  font-weight: 900;
}
.quick-action:nth-child(1) {
  color: #06152c;
  background: linear-gradient(135deg, #58d8ff, #7fd7c8);
  border-color: transparent;
}
.quick-action:nth-child(2) {
  background: linear-gradient(135deg, #6576ff, #8a6dff);
  border-color: rgba(180,190,255,.44);
}
.quick-action:nth-child(3) {
  color: #fff;
  background: linear-gradient(135deg, #a45dff, #e06ed4);
  border-color: rgba(235,185,255,.42);
}
.quick-action:hover {
  transform: translateY(-3px);
  background: rgba(255,255,255,.16);
  border-color: rgba(255,255,255,.42);
  box-shadow: 0 18px 42px rgba(56,214,255,.18);
}
.facts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; max-width: 720px; margin-top: 34px; }
.facts div, .glass-panel, .key-dates, .role-grid article, .topic-list article, .timeline article, .guide-grid article {
  background: var(--panel);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 8px;
  box-shadow: 0 24px 80px rgba(0,0,0,.22);
}
.facts div { padding: 18px; }
.facts b { display: block; font-size: 22px; word-break: keep-all; }
.facts span { color: var(--muted); }
.poster-card {
  position: relative;
  margin: 0;
  padding: 12px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 8px;
  transform: rotate(2deg);
  box-shadow: 0 36px 120px rgba(0,0,0,.45);
}
.poster-card::before {
  content: "";
  position: absolute;
  inset: 28px -26px -26px 28px;
  z-index: -1;
  border-radius: 8px;
  background: linear-gradient(145deg, rgba(56,214,255,.32), rgba(255,94,196,.2));
  filter: blur(2px);
}
.poster-card img { display: block; width: 100%; border-radius: 4px; }
.poster-card figcaption { margin-top: 10px; color: var(--muted); font-size: 14px; text-align: center; }
.conference-poster,
.conference-photo {
  max-width: 620px;
  justify-self: center;
}
.conference-photo img {
  height: auto;
  object-fit: contain;
}
html:lang(en) .hero {
  grid-template-columns: minmax(0, 1fr) minmax(300px, .54fr);
  gap: 34px;
}
html:lang(en) .hero-copy {
  max-width: 780px;
}
html:lang(en) .poster-card {
  max-width: 540px;
}
html:lang(en) .quick-actions {
  width: min(540px, 100%);
}
html:lang(en) .quick-action {
  white-space: normal;
  line-height: 1.25;
  min-height: 62px;
  padding: 12px 10px;
  font-size: 15px;
}
.bio-visual {
  position: relative;
  min-height: 560px;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 8px;
  background:
    radial-gradient(circle at 50% 48%, rgba(56,214,255,.35), transparent 23%),
    radial-gradient(circle at 56% 44%, rgba(255,94,196,.26), transparent 34%),
    linear-gradient(145deg, rgba(255,255,255,.14), rgba(255,255,255,.04));
  box-shadow: 0 36px 120px rgba(0,0,0,.42);
  overflow: hidden;
  animation: slide-up .9s ease .12s both, jump-soft 5.2s ease-in-out infinite;
}
.bio-visual::before,
.bio-visual::after {
  content: "";
  position: absolute;
  inset: 70px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.16);
}
.bio-visual::after {
  inset: 128px;
  border-color: rgba(56,214,255,.32);
  animation: slow-spin 18s linear infinite reverse;
}
.visual-core {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 220px;
  height: 220px;
  display: grid;
  place-items: center;
  align-content: center;
  border-radius: 50%;
  background: rgba(8,13,36,.68);
  border: 1px solid rgba(255,255,255,.22);
  box-shadow: 0 0 90px rgba(56,214,255,.26), inset 0 0 44px rgba(154,108,255,.28);
  backdrop-filter: blur(12px);
  animation: pulse-glow 4.6s ease-in-out infinite;
}
.visual-core strong { font-size: 76px; line-height: 1; color: #fff; }
.visual-core em { font-style: normal; color: var(--cyan); font-weight: 800; }
.helix {
  position: absolute;
  inset: 10% 18%;
  animation: float-y 6s ease-in-out infinite;
}
.helix span {
  position: absolute;
  left: calc(var(--x) * 1%);
  top: calc(var(--y) * 1%);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, #38d6ff, #ff5ec4);
  box-shadow: 0 0 26px rgba(56,214,255,.7);
}
.helix span::after {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  width: 170px;
  height: 1px;
  background: linear-gradient(90deg, rgba(255,255,255,.45), transparent);
  transform: rotate(var(--r));
  transform-origin: left center;
}
.helix span:nth-child(1) { --x: 8; --y: 22; --r: 18deg; }
.helix span:nth-child(2) { --x: 78; --y: 16; --r: 158deg; }
.helix span:nth-child(3) { --x: 18; --y: 34; --r: 8deg; }
.helix span:nth-child(4) { --x: 68; --y: 30; --r: 170deg; }
.helix span:nth-child(5) { --x: 26; --y: 47; --r: -8deg; }
.helix span:nth-child(6) { --x: 62; --y: 46; --r: 188deg; }
.helix span:nth-child(7) { --x: 19; --y: 60; --r: -18deg; }
.helix span:nth-child(8) { --x: 72; --y: 64; --r: 198deg; }
.helix span:nth-child(9) { --x: 12; --y: 74; --r: -28deg; }
.helix span:nth-child(10) { --x: 82; --y: 80; --r: 208deg; }
.helix span:nth-child(11) { --x: 32; --y: 86; --r: -38deg; }
.helix span:nth-child(12) { --x: 63; --y: 92; --r: 218deg; }
.orbit-card {
  position: absolute;
  z-index: 2;
  padding: 9px 13px;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 999px;
  background: rgba(8,13,36,.6);
  color: #f8fbff;
  font-size: 13px;
  font-weight: 800;
  box-shadow: 0 14px 36px rgba(0,0,0,.3);
  backdrop-filter: blur(14px);
  animation: float-y 5s ease-in-out infinite;
}
.orbit-one { right: 37%; top: 28%; }
.orbit-two { right: 7%; top: 18%; animation-delay: 1.1s; }
.orbit-three { right: 30%; bottom: 18%; animation-delay: 2.1s; }
.section { padding: 86px 5vw; scroll-margin-top: 92px; }
.section > * { animation: slide-up .75s ease both; }
.section:nth-of-type(even) {
  background:
    linear-gradient(90deg, rgba(56,214,255,.05), transparent 35%, rgba(255,94,196,.05)),
    rgba(255,255,255,.025);
}
.section-title { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 32px; border-bottom: 1px solid rgba(255,255,255,.16); padding-bottom: 18px; }
.section-title p { margin: 0; color: var(--cyan); font-weight: 800; }
.subsection-heading {
  margin: 0 0 18px;
  color: #fff;
  font-size: 22px;
}
.intro-grid, .registration-grid, .two-col { display: grid; grid-template-columns: 1.35fr .65fr; gap: 22px; align-items: start; }
.registration-grid { grid-template-columns: 1fr; }
.glass-panel { padding: 28px; }
.long-copy p { margin-top: 0; color: #edf1ff; }
.intro-card { padding: 24px 28px; }
.intro-card p {
  margin: 0 0 22px;
  font-size: clamp(21px, 1.75vw, 28px);
  font-weight: 430;
  line-height: 1.78;
  color: #dfe7ff;
}
.intro-card p:last-child { margin-bottom: 0; }
.intro-card h3 {
  margin: 0 0 14px;
  font-size: clamp(24px, 2.3vw, 34px);
  color: #fff;
}
.intro-lede {
  max-width: 980px;
  font-size: clamp(20px, 1.75vw, 26px);
  font-weight: 800;
  line-height: 1.62;
}
.intro-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0 24px;
}
.intro-highlights span {
  padding: 8px 13px;
  border-radius: 999px;
  color: #07142d;
  background: linear-gradient(90deg, rgba(56,214,255,.95), rgba(185,160,255,.92));
  font-size: 14px;
  font-weight: 900;
}
.intro-mini-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0;
}
.intro-mini-grid div {
  min-height: 92px;
  padding: 14px;
  border-radius: 8px;
  background: rgba(8, 18, 44, .34);
  border: 1px solid rgba(255,255,255,.14);
}
.intro-mini-grid b,
.intro-mini-grid span { display: block; }
.intro-mini-grid b { color: var(--cyan); font-size: 14px; }
.intro-mini-grid span { margin-top: 6px; color: #f2f6ff; font-weight: 760; line-height: 1.35; }
.key-dates { padding: 22px 24px; background: linear-gradient(180deg, rgba(56,214,255,.18), rgba(154,108,255,.12)); }
.key-dates dl { margin: 0; }
.key-dates div { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.14); }
.key-dates dt { color: var(--muted); }
.key-dates dd { margin: 2px 0 0; font-size: clamp(18px, 1.45vw, 22px); font-weight: 760; line-height: 1.35; color: #f2f6ff; }
.split { display: grid; grid-template-columns: minmax(0, .9fr) minmax(280px, .52fr); gap: 42px; align-items: center; }
.check-list { padding-left: 20px; color: #edf1ff; }
.youth-lab {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 12% 18%, rgba(56,214,255,.22), transparent 28%),
    radial-gradient(circle at 88% 20%, rgba(255,94,196,.22), transparent 30%),
    rgba(255,255,255,.045);
}
.youth-lab::before {
  content: "";
  position: absolute;
  inset: 8% -12% auto auto;
  width: 520px;
  height: 520px;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 50%;
}
.youth-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 40px;
  align-items: center;
  margin-bottom: 26px;
}
.youth-lead { max-width: 760px; font-size: 19px; color: var(--muted); }
.youth-orbit {
  position: relative;
  min-height: 320px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,.16);
  background: linear-gradient(145deg, rgba(255,255,255,.14), rgba(255,255,255,.04));
  box-shadow: 0 28px 80px rgba(0,0,0,.24);
}
.youth-orbit span {
  width: 132px;
  height: 132px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(8,13,36,.75);
  color: #fff;
  font-size: 52px;
  font-weight: 900;
  box-shadow: 0 0 70px rgba(56,214,255,.35);
}
.youth-orbit i {
  position: absolute;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--pink));
  box-shadow: 0 0 28px rgba(56,214,255,.7);
}
.youth-orbit i:nth-child(2) { left: 20%; top: 28%; }
.youth-orbit i:nth-child(3) { right: 18%; top: 34%; }
.youth-orbit i:nth-child(4) { left: 28%; bottom: 22%; }
.youth-orbit i:nth-child(5) { right: 26%; bottom: 18%; }
.youth-cards {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 18px;
}
.youth-cards article, .classic-youth-grid article {
  padding: 22px;
  border-radius: 8px;
  background: rgba(255,255,255,.11);
  border: 1px solid rgba(255,255,255,.16);
}
.youth-cards b { display: block; color: #fff; font-size: 18px; margin-bottom: 8px; }
.youth-cards p { margin: 0; color: var(--muted); }
.youth-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 18px; margin-top: 18px; }
.track-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.track-tags span {
  padding: 9px 12px;
  border-radius: 999px;
  background: rgba(56,214,255,.12);
  border: 1px solid rgba(56,214,255,.28);
  color: #eef8ff;
  font-weight: 700;
}
.youth-form {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
  padding: 20px;
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}
.youth-form label { display: grid; gap: 6px; font-weight: 700; }
.youth-form button { grid-column: auto; align-self: end; }
.role-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.role-grid article { padding: 22px; }
.role-grid article:hover, .topic-list article:hover, .timeline article:hover, .guide-grid article:hover {
  transform: translateY(-8px);
  border-color: rgba(56,214,255,.42);
  box-shadow: 0 28px 90px rgba(56,214,255,.16);
}
.role-grid p, .speakers p { color: var(--muted); margin-bottom: 0; }
.speakers { margin-top: 18px; }
.poster-info { margin-top: 20px; }
.topic-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-bottom: 20px; }
.topic-list article { min-height: 150px; padding: 20px; background: linear-gradient(150deg, rgba(56,214,255,.17), rgba(255,94,196,.09)); }
.topic-list article {
  position: relative;
  overflow: hidden;
}
.topic-list article::after {
  content: "";
  position: absolute;
  right: -34px;
  bottom: -34px;
  width: 112px;
  height: 112px;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 50%;
}
.topic-list span { color: var(--cyan); font-weight: 900; }
.topic-list h3 { margin-top: 16px; font-size: 19px; }
.topic-list p { margin: 10px 0 0; color: var(--muted); font-size: 13px; font-weight: 800; }
.timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.timeline article { padding: 22px; }
.timeline time { color: var(--cyan); font-weight: 900; }
.signup-form { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; padding: 24px; background: #fff; color: var(--ink); border-radius: 8px; }
.signup-form label { display: grid; gap: 6px; font-weight: 700; }
.signup-form .wide { grid-column: 1 / -1; }
.signup-form [hidden] { display: none; }
.checkline {
  grid-template-columns: auto 1fr;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 6px;
  background: #f4f7ff;
  border: 1px solid #dde6ff;
  line-height: 1.5;
}
.checkline input { width: 18px; height: 18px; margin-top: 3px; }
input, select, textarea, button { width: 100%; font: inherit; border-radius: 6px; border: 1px solid #cbd4ee; padding: 11px 12px; }
textarea { min-height: 104px; resize: vertical; }
button { grid-column: 1 / -1; border: 0; background: linear-gradient(90deg, #284cff, #8f3dff); color: white; font-weight: 800; cursor: pointer; }
.payment-panel {
  align-self: start;
  padding: 24px;
  background:
    linear-gradient(145deg, rgba(18, 31, 86, .92), rgba(78, 49, 145, .72)),
    rgba(255,255,255,.08);
}
.payment-panel h3 {
  margin-bottom: 10px;
  color: #fff;
}
.payment-lead {
  margin: 0;
  color: #dfe8ff;
  font-size: 14px;
  line-height: 1.75;
}
.fee-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 18px;
}
.fee-grid article {
  padding: 22px;
  border-radius: 8px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.15);
}
.fee-grid p { color: var(--muted); margin-bottom: 0; }
.fee-table-wrap {
  overflow-x: auto;
  margin: 16px 0;
  border-radius: 8px;
  border: 1px solid rgba(124, 207, 255, .24);
  background: rgba(255,255,255,.94);
  box-shadow: 0 18px 44px rgba(0,0,0,.18);
}
.fee-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  color: var(--ink);
  font-size: 13px;
}
.fee-table th,
.fee-table td {
  padding: 11px 10px;
  border: 1px solid rgba(29, 46, 100, .12);
  text-align: center;
  vertical-align: middle;
}
.fee-table th {
  background: linear-gradient(135deg, #15235d, #6b27c8);
  color: #fff;
  font-weight: 900;
}
.fee-table thead tr:nth-child(2) th {
  background: #dfe7ff;
  color: #17254f;
}
.fee-table tbody tr:nth-child(odd) td { background: rgba(255, 255, 255, .82); }
.fee-table tbody tr:nth-child(even) td { background: rgba(226, 233, 255, .72); }
.fee-table td:first-child {
  text-align: left;
  font-weight: 800;
}
.payment-note {
  display: grid;
  gap: 6px;
  padding: 15px;
  border-radius: 8px;
  background: rgba(8, 18, 54, .44);
  border: 1px solid rgba(112, 224, 255, .22);
}
.payment-note span {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
}
.payment-note a {
  color: #fff;
  font-size: 17px;
  font-weight: 900;
  overflow-wrap: anywhere;
}
.payment-note small {
  color: #cbd7ff;
  line-height: 1.5;
}
.guide-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.guide-grid article { padding: 22px; }
.support-grid { margin-bottom: 18px; }
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--cyan);
  font-weight: 900;
  text-decoration: none;
}
.text-link::after { content: "›"; font-size: 20px; line-height: 1; }
.sponsor-hero { padding-top: 96px; }
.sponsor-table-wrap {
  overflow-x: auto;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 8px;
  background: rgba(255,255,255,.08);
  box-shadow: 0 24px 80px rgba(0,0,0,.22);
}
.sponsor-table {
  width: 100%;
  min-width: 780px;
  border-collapse: collapse;
  color: var(--text);
}
.sponsor-table th,
.sponsor-table td {
  padding: 16px 18px;
  border-bottom: 1px solid rgba(255,255,255,.12);
  text-align: left;
  vertical-align: top;
}
.sponsor-table th {
  color: #07142d;
  background: linear-gradient(90deg, #58d8ff, #aeb9ff);
}
.sponsor-table tr:last-child td { border-bottom: 0; }
.partner-bands { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.partner-bands span { display: grid; place-items: center; min-height: 92px; padding: 18px; color: var(--ink); background: #fff; border-radius: 8px; font-weight: 800; text-align: center; }
.footer { padding: 28px 5vw 44px; text-align: center; color: var(--muted); border-top: 1px solid rgba(255,255,255,.14); }
.gallery-section { position: relative; overflow: hidden; }
.gallery-feature {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr);
  gap: 24px;
  align-items: stretch;
  margin-bottom: 18px;
}
.gallery-feature img,
.gallery-grid img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.image-missing {
  display: grid;
  place-items: center;
  min-height: 220px;
  padding: 24px;
  border: 1px dashed rgba(255,255,255,.3);
  border-radius: 8px;
  color: var(--muted);
  background: rgba(255,255,255,.08);
  text-align: center;
  font-weight: 800;
}
.gallery-feature img {
  min-height: 360px;
  border-radius: 8px;
  box-shadow: 0 28px 90px rgba(0,0,0,.28);
}
.gallery-feature div {
  display: grid;
  align-content: end;
  padding: 26px;
  border-radius: 8px;
  background: linear-gradient(145deg, rgba(56,214,255,.18), rgba(255,94,196,.14));
  border: 1px solid rgba(255,255,255,.16);
}
.gallery-feature h3 { font-size: clamp(24px, 3vw, 40px); }
.gallery-feature p { color: var(--muted); }
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.gallery-grid figure {
  margin: 0;
  min-height: 210px;
  border-radius: 8px;
  overflow: hidden;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
}
.gallery-grid figcaption {
  padding: 10px 12px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}
.zoomable-image {
  cursor: zoom-in;
  transition: transform .22s ease, filter .22s ease;
}
.zoomable-image:hover {
  filter: brightness(1.08) saturate(1.04);
}
.image-lightbox {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: none;
  place-items: center;
  padding: 5vw;
  background: rgba(3, 8, 24, .84);
  backdrop-filter: blur(16px);
}
.image-lightbox[aria-hidden="false"] { display: grid; }
.image-lightbox figure {
  max-width: min(1120px, 92vw);
  max-height: 88vh;
  margin: 0;
}
.image-lightbox img {
  display: block;
  max-width: 100%;
  max-height: 78vh;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 34px 100px rgba(0,0,0,.55);
}
.image-lightbox figcaption {
  margin-top: 12px;
  color: #edf4ff;
  text-align: center;
  font-weight: 800;
}
.lightbox-close {
  position: fixed;
  top: 22px;
  right: 24px;
  width: 46px;
  height: 46px;
  padding: 0;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.24);
  background: rgba(255,255,255,.12);
  color: #fff;
  font-size: 30px;
  line-height: 1;
  cursor: pointer;
}
body.lightbox-open { overflow: hidden; }

.classic { background: #f3f6ff; color: #16213f; }
.classic-header { padding: 36px 5vw 22px; background: linear-gradient(135deg, #132d7a, #6333b8); color: #fff; text-align: center; }
.classic-header h1 { font-size: clamp(34px, 5vw, 58px); }
.classic-header nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 24px; }
.classic-header a { padding: 8px 14px; color: #fff; text-decoration: none; border: 1px solid rgba(255,255,255,.35); border-radius: 4px; }
.classic-main { width: min(1120px, 92vw); margin: 28px auto 60px; }
.classic-main section { background: #fff; margin: 18px 0; padding: 30px; border-radius: 6px; box-shadow: 0 18px 50px rgba(24, 39, 90, .11); }
.classic-main h2 { font-size: 30px; color: #203c97; border-bottom: 2px solid #7b5cff; padding-bottom: 10px; margin-bottom: 18px; }
.classic-banner { display: block; width: min(760px, 100%); margin: 0 auto 24px; border-radius: 6px; box-shadow: 0 16px 60px rgba(24,39,90,.2); }
.visual-banner {
  min-height: 260px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 10px;
  color: #fff;
  text-align: center;
  background:
    radial-gradient(circle at 22% 26%, rgba(56,214,255,.5), transparent 24%),
    radial-gradient(circle at 80% 74%, rgba(255,94,196,.38), transparent 26%),
    linear-gradient(135deg, #142b80, #6232b6 58%, #0a1739);
}
.visual-banner span { font-weight: 900; color: #52e2ff; }
.visual-banner strong { font-size: clamp(26px, 4vw, 48px); line-height: 1.1; }
.classic-info { display: block; width: min(720px, 100%); margin: 18px auto 0; border-radius: 6px; }
.classic-dates { padding: 16px; background: #eef3ff; border-left: 4px solid #735cff; }
.classic-youth-hero {
  padding: 26px;
  border-radius: 6px;
  color: #fff;
  background:
    radial-gradient(circle at 20% 18%, rgba(56,214,255,.42), transparent 28%),
    linear-gradient(135deg, #142b80, #6333b8);
}
.classic-youth-hero h3 { font-size: 28px; margin: 8px 0 10px; }
.classic-youth-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 16px 0;
}
.classic-youth-grid article {
  background: #eef3ff;
  border: 1px solid #dfe6ff;
  color: #16213f;
}
.classic-youth-grid b, .classic-youth-grid span { display: block; }
.classic-youth-grid span { color: #526080; margin-top: 6px; }
.classic table { width: 100%; border-collapse: collapse; }
.classic th, .classic td { padding: 13px 14px; border: 1px solid #dfe6ff; text-align: left; }
.classic th { background: #eef3ff; }
.compact-form { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.compact-form button { grid-column: auto; }

@media (max-width: 980px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  .brand { min-width: 0; }
  .nav { justify-content: flex-start; flex-wrap: wrap; font-size: 14px; }
  .dropdown { left: 0; transform: translate(0, 8px); }
  .nav-item:hover .dropdown,
  .nav-item:focus-within .dropdown { transform: translate(0, 0); }
  .hero, .intro-grid, .registration-grid, .two-col, .split { grid-template-columns: 1fr; }
  .intro-mini-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .youth-hero, .youth-grid { grid-template-columns: 1fr; }
  .role-grid, .topic-list, .timeline, .guide-grid, .partner-bands, .youth-cards, .classic-youth-grid, .gallery-grid, .fee-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-feature { grid-template-columns: 1fr; }
  .poster-card { transform: none; max-width: 520px; }
  .bio-visual { min-height: 420px; }
  .orbit-card { display: none; }
}
@media (max-width: 640px) {
  .hero { padding-top: 44px; }
  .quick-actions { flex-wrap: wrap; }
  .quick-action { flex: 1 1 120px; padding-inline: 8px; }
  .facts, .intro-mini-grid, .role-grid, .topic-list, .timeline, .guide-grid, .partner-bands, .signup-form, .compact-form, .youth-cards, .classic-youth-grid, .youth-form, .gallery-grid, .fee-grid { grid-template-columns: 1fr; }
  .section { padding: 60px 5vw; }
  .section-title { display: block; }
  .nav { gap: 6px; }
  .nav-link,
  .nav .language-toggle { min-height: 34px; padding: 7px 10px; font-size: 13px; }
  .dropdown { position: static; display: none; min-width: 100%; margin-top: 4px; transform: none; }
  .nav-item:hover .dropdown,
  .nav-item:focus-within .dropdown { display: block; transform: none; }
  .compact-form button { grid-column: auto; }
  .youth-form button { grid-column: auto; }
  .brand > span:last-child { max-width: 240px; }
}

@keyframes pulse {
  0%, 100% { transform: scale(.8); opacity: .65; }
  50% { transform: scale(1.25); opacity: 1; }
}
@keyframes float-y {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}
@keyframes slow-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes slide-up {
  from { opacity: 1; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes jump-soft {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 90px rgba(56,214,255,.26), inset 0 0 44px rgba(154,108,255,.28); }
  50% { box-shadow: 0 0 130px rgba(255,94,196,.32), inset 0 0 58px rgba(56,214,255,.3); }
}