:root {
  --blue: #098bdd;
  --sky: #bdeaff;
  --navy: #06194a;
  --red: #ec1f24;
  --green: #088832;
  --yellow: #ffd525;
  --white: #fff;
  --ink: #0a1740;
  --muted: #526078;
  --display: "Barlow Condensed", "Arial Narrow", sans-serif;
  --body: "Outfit", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
section[id] { scroll-margin-top: 84px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: var(--body);
  overflow-x: hidden;
}

a { color: inherit; }
img { display: block; max-width: 100%; }
button { font: inherit; }

.site-header {
  height: 84px;
  padding: 0 clamp(24px, 5vw, 84px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  color: var(--white);
  background: rgba(3, 126, 203, .94);
  border-bottom: 1px solid rgba(255, 255, 255, .18);
  box-shadow: 0 8px 28px rgba(3, 36, 87, .14);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}
.brand-logo {
  width: auto;
  height: 70px;
  display: block;
  padding: 5px 9px;
  border-radius: 5px;
  background: var(--white);
}

.main-nav { display: flex; align-items: center; gap: 32px; }
.main-nav a {
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  position: relative;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -7px;
  height: 2px;
  background: var(--yellow);
  transition: right .25s ease;
}
.main-nav a:hover::after { right: 0; }
.language-toggle {
  color: var(--navy);
  background: var(--yellow);
  border: 0;
  border-radius: 999px;
  padding: 9px 16px;
  font-weight: 800;
  cursor: pointer;
}
.menu-button { display: none; }

.hero {
  min-height: 820px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
  align-items: center;
  gap: clamp(36px, 6vw, 92px);
  padding: 130px clamp(24px, 7vw, 120px) 80px;
  position: relative;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 74% 20%, rgba(255,255,255,.22) 0 1px, transparent 2px),
    linear-gradient(128deg, #0079ce 0%, #10a5e5 58%, #d4f2ff 100%);
}
.hero::before {
  content: "";
  position: absolute;
  width: 630px;
  height: 630px;
  border: 2px solid rgba(255,255,255,.22);
  border-radius: 50%;
  right: 2%;
  top: 10%;
}
.hero::after {
  content: "";
  position: absolute;
  left: -8%;
  right: -8%;
  bottom: -100px;
  height: 180px;
  background: var(--white);
  transform: rotate(-2deg);
}
.hero-confetti {
  position: absolute;
  inset: 120px 0 auto;
  height: 150px;
  opacity: .85;
  background-image:
    linear-gradient(30deg, transparent 48%, var(--yellow) 49% 52%, transparent 53%),
    linear-gradient(-35deg, transparent 48%, var(--red) 49% 52%, transparent 53%);
  background-size: 170px 100px, 210px 130px;
  mask-image: linear-gradient(90deg, #000, transparent 48%, #000);
}
.hero-copy { position: relative; z-index: 3; max-width: 700px; }
.hero h1 {
  margin: 0;
  font: 900 clamp(72px, 8vw, 132px)/.72 var(--display);
  text-transform: uppercase;
  letter-spacing: -.035em;
}
.hero h1 span, .hero h1 em, .hero h1 b { display: block; }
.hero h1 span { font-size: .48em; letter-spacing: .015em; margin-bottom: 14px; }
.hero h1 em {
  color: var(--yellow);
  font-style: italic;
  text-shadow: 5px 5px 0 var(--navy);
  transform: skew(-3deg);
}
.hero h1 b { color: var(--white); font-size: .8em; margin-top: 14px; }
.hero-intro { font: 700 clamp(18px, 2vw, 25px)/1.25 var(--display); text-transform: uppercase; letter-spacing: .06em; margin: 32px 0 24px; }

.event-facts { display: grid; gap: 15px; }
.event-facts > div { display: flex; align-items: center; gap: 14px; }
.event-facts svg {
  width: 25px;
  height: 25px;
  flex: 0 0 auto;
  fill: none;
  stroke: var(--yellow);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.event-facts span { display: grid; gap: 3px; }
.event-facts strong { font-size: 16px; }
.event-facts small { font-size: 13px; color: rgba(255,255,255,.78); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 31px; }
.button {
  padding: 15px 22px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: 800;
  font-size: 14px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--red); box-shadow: 0 9px 25px rgba(88,0,10,.23); }
.button-secondary { border: 1px solid rgba(255,255,255,.58); background: rgba(255,255,255,.08); }
.presented { margin-top: 22px; font-size: 12px; color: rgba(255,255,255,.7); }

.poster-stage { position: relative; z-index: 4; width: min(430px, 100%); justify-self: center; }
.poster-stage img {
  position: relative;
  z-index: 2;
  width: 100%;
  border: 7px solid var(--white);
  box-shadow: 0 28px 70px rgba(0,35,88,.35);
  transform: rotate(2.2deg);
}
.poster-shadow {
  position: absolute;
  inset: 5% -10% -5% 7%;
  background: var(--yellow);
  transform: rotate(-4deg);
}
.ball { position: absolute; z-index: 5; filter: drop-shadow(0 10px 14px rgba(0,0,0,.25)); }
.ball-one { font-size: 67px; left: -55px; bottom: 8%; transform: rotate(-20deg); }
.ball-two { font-size: 33px; right: -38px; top: 19%; transform: rotate(18deg); }

.highlights { padding: 110px clamp(24px, 7vw, 120px) 125px; }
.section-heading { display: grid; grid-template-columns: .65fr 1.35fr; align-items: end; gap: 40px; margin-bottom: 62px; }
.section-heading p, .sponsor-copy p, .guest-label {
  margin: 0;
  color: var(--red);
  font: 800 15px/1 var(--display);
  text-transform: uppercase;
  letter-spacing: .11em;
}
.section-heading h2, .sponsor h2, .details h2, .contact h2 {
  margin: 0;
  font: 900 clamp(45px, 5vw, 76px)/.93 var(--display);
  text-transform: uppercase;
  letter-spacing: -.025em;
}
.highlight-track {
  display: grid;
  grid-template-columns: 1.2fr repeat(4, 1fr);
  border-top: 1px solid #cad4df;
  border-bottom: 1px solid #cad4df;
}
.highlight {
  min-height: 350px;
  padding: 28px 24px 30px;
  border-left: 1px solid #cad4df;
  position: relative;
  transition: color .25s ease, background .25s ease, transform .25s ease;
}
.highlight:last-child { border-right: 1px solid #cad4df; }
.highlight:hover { background: var(--navy); color: var(--white); transform: translateY(-8px); }
.highlight-feature { background: var(--yellow); }
.highlight-number { font: 700 12px/1 var(--body); opacity: .55; }
.highlight-icon {
  width: 68px;
  height: 68px;
  margin: 42px 0 30px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--red);
  border-radius: 50%;
  font: 900 28px/1 var(--display);
  transform: rotate(-6deg);
}
.pitch { border-radius: 3px; background: var(--green); border: 3px solid var(--white); box-shadow: 0 0 0 2px var(--green); }
.pitch span { font-size: 20px; }
.dance { background: var(--red); }
.food { background: var(--yellow); color: var(--navy); }
.community-icon { background: var(--blue); }
.volunteer { background: var(--green); }
.highlight h3 { margin: 0 0 13px; font: 800 24px/.95 var(--display); text-transform: uppercase; }
.highlight p { margin: 0; font-size: 13px; line-height: 1.55; color: var(--muted); }
.highlight:hover p { color: rgba(255,255,255,.72); }

.sponsor {
  min-height: 310px;
  padding: 65px clamp(24px, 7vw, 120px);
  color: var(--white);
  background: var(--red);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: clamp(30px, 6vw, 90px);
  position: relative;
  overflow: hidden;
}
.sponsor::before, .sponsor::after {
  content: "✦";
  position: absolute;
  color: var(--yellow);
  font-size: 58px;
  opacity: .9;
}
.sponsor::before { left: 3%; top: 10%; }
.sponsor::after { right: 4%; bottom: 7%; transform: rotate(20deg); }
.sponsor-copy p { color: var(--yellow); margin-bottom: 14px; }
.sponsor h2 { font-size: clamp(38px, 4vw, 61px); }
.airbnb-wordmark {
  font: 700 clamp(54px, 7vw, 92px)/1 var(--body);
  letter-spacing: -.07em;
  color: var(--white);
}
.airbnb-wordmark::before { content: "⌂"; font-family: var(--body); font-size: .65em; margin-right: 9px; }
.sponsor-note { max-width: 270px; font-size: 15px; line-height: 1.5; color: rgba(255,255,255,.8); }

.community {
  padding: 120px clamp(24px, 9vw, 150px);
  background: #eaf8ff;
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  align-items: center;
  gap: clamp(60px, 9vw, 150px);
}
.guest-visual { position: relative; width: min(430px, 100%); justify-self: center; }
.guest-photo {
  height: 530px;
  overflow: hidden;
  position: relative;
  z-index: 2;
  border-radius: 49% 49% 8px 8px;
  box-shadow: 0 28px 60px rgba(0,74,127,.18);
  background: var(--navy);
}
.guest-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 92% 100%;
  transform: scale(1.55);
  transform-origin: 92% 100%;
}
.guest-accent {
  position: absolute;
  width: 190px;
  height: 190px;
  left: -38px;
  bottom: -30px;
  border-radius: 50%;
  background: var(--yellow);
}
.guest-copy h2 {
  margin: 22px 0 4px;
  font: 900 clamp(62px, 7vw, 105px)/.8 var(--display);
  text-transform: uppercase;
  letter-spacing: -.04em;
}
.guest-copy h2 span { display: block; margin-top: 18px; color: var(--red); font-family: "Noto Sans SC", sans-serif; font-size: .45em; letter-spacing: .05em; }
.guest-copy h3 { margin: 27px 0 22px; font: 800 22px/1 var(--display); text-transform: uppercase; color: var(--blue); }
.guest-copy > p:last-of-type { max-width: 630px; color: var(--muted); font-size: 17px; line-height: 1.75; }
.signature-line { width: 170px; height: 8px; margin-top: 34px; background: var(--green); transform: skew(-25deg); }

.details {
  padding: 115px clamp(24px, 8vw, 135px);
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: clamp(60px, 9vw, 140px);
  background: var(--navy);
  color: var(--white);
}
.details-title p { max-width: 450px; margin: 30px 0 0; color: rgba(255,255,255,.65); line-height: 1.7; }
.details-list { border-top: 1px solid rgba(255,255,255,.24); }
.details-list > div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid rgba(255,255,255,.24);
}
.details-list span { color: var(--yellow); font: 800 14px/1 var(--display); text-transform: uppercase; letter-spacing: .08em; }
.details-list strong { font-size: 17px; font-weight: 600; }
.map-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  color: var(--white);
  text-decoration: none;
  font-weight: 700;
}
.map-link svg { width: 27px; fill: none; stroke: var(--yellow); stroke-width: 2; transition: transform .2s ease; }
.map-link:hover svg { transform: translateX(6px); }

.contact {
  padding: 100px clamp(24px, 8vw, 135px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: end;
  gap: 70px;
  background: var(--yellow);
}
.contact > div > p { max-width: 500px; margin: 25px 0 0; line-height: 1.65; }
.contact-links { display: grid; }
.contact-links a {
  display: flex;
  justify-content: space-between;
  gap: 25px;
  padding: 24px 0;
  border-bottom: 2px solid rgba(6,25,74,.25);
  text-decoration: none;
  font: 700 clamp(18px, 2vw, 26px)/1 var(--display);
}
.contact-links span { font: 700 12px/1 var(--body); text-transform: uppercase; letter-spacing: .1em; opacity: .55; }

footer {
  padding: 34px clamp(24px, 5vw, 84px);
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 25px;
  font-size: 12px;
  color: var(--muted);
}
.footer-brand { color: var(--navy); }
.footer-brand .brand-logo {
  width: 230px;
  height: auto;
}

@media (max-width: 1040px) {
  .main-nav { gap: 18px; }
  .hero { grid-template-columns: 1fr .78fr; padding-left: 45px; padding-right: 45px; }
  .highlight-track { grid-template-columns: repeat(3, 1fr); }
  .highlight:nth-child(4) { border-left: 1px solid #cad4df; }
  .sponsor { grid-template-columns: 1fr 1fr; }
  .sponsor-note { grid-column: 1 / -1; max-width: 550px; }
}

@media (max-width: 780px) {
  .site-header { height: 72px; padding: 0 20px; }
  section[id] { scroll-margin-top: 72px; }
  .brand-logo {
    width: auto;
    height: 58px;
  }
  .menu-button {
    display: grid;
    gap: 5px;
    width: 42px;
    height: 42px;
    place-content: center;
    border: 1px solid rgba(255,255,255,.4);
    border-radius: 50%;
    background: rgba(0,0,0,.08);
    cursor: pointer;
  }
  .menu-button span { width: 18px; height: 2px; background: var(--white); }
  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 16px;
    right: 16px;
    padding: 22px;
    border-radius: 8px;
    background: var(--navy);
    box-shadow: 0 20px 40px rgba(0,0,0,.25);
    flex-direction: column;
    align-items: stretch;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 8px 0; font-size: 17px; }
  .language-toggle { align-self: flex-start; }
  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 65px;
    padding: 115px 22px 135px;
  }
  .hero h1 { font-size: clamp(62px, 20vw, 98px); }
  .hero h1 span {
    font-size: .38em;
    letter-spacing: -.01em;
    white-space: nowrap;
  }
  html[lang="zh-Hans"] .hero h1 {
    font-size: clamp(52px, 16vw, 68px);
  }
  .poster-stage { width: min(390px, 84vw); }
  .section-heading { grid-template-columns: 1fr; gap: 18px; }
  .highlights { padding: 80px 22px 95px; }
  .highlight-track { grid-template-columns: 1fr; border-bottom: 0; }
  .highlight, .highlight:last-child { min-height: auto; border-right: 0; border-bottom: 1px solid #cad4df; }
  .highlight-icon { margin: 25px 0 22px; }
  .sponsor { grid-template-columns: 1fr; gap: 28px; padding: 60px 25px; }
  .sponsor-note { grid-column: auto; }
  .community { grid-template-columns: 1fr; padding: 90px 24px; }
  .guest-photo { height: 460px; }
  .details, .contact { grid-template-columns: 1fr; padding: 80px 24px; gap: 55px; }
  .details-list > div { grid-template-columns: 90px 1fr; }
  footer { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}