:root {
  --navy: #0b3e80;
  --deep: #052b61;
  --ink: #082450;
  --sky: #72b9d5;
  --ice: #eaf8ff;
  --paper: #f7fbfd;
  --white: #fff;
  --muted: #5c7893;
  --line: rgba(8, 54, 110, .16);
  --serif: "Times New Roman", "Noto Serif TC", serif;
  --sans: "Avenir Next", "Helvetica Neue", "Noto Sans TC", Arial, sans-serif;
  --max: 1280px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
button, input { font: inherit; }
button { color: inherit; }

.skip-link {
  position: fixed;
  z-index: 200;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  border-radius: 4px;
  background: #fff;
  transform: translateY(-150%);
}
.skip-link:focus { transform: none; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-height: 82px;
  padding: 0 clamp(22px, 4vw, 72px);
  border-bottom: 1px solid transparent;
  transition: background .25s ease, border-color .25s ease, min-height .25s ease;
}
.site-header.is-scrolled {
  min-height: 66px;
  border-color: rgba(4, 42, 93, .12);
  background: rgba(248, 253, 255, .92);
  backdrop-filter: blur(16px);
  box-shadow: 0 8px 32px rgba(9, 54, 104, .06);
}
.site-nav { display: flex; align-items: center; gap: 30px; }
.site-nav a {
  text-decoration: none;
  color: var(--deep);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .09em;
}
.site-nav a:not(.nav-cta):hover { color: #2b8fbd; }
.nav-cta {
  padding: 12px 18px;
  border: 1px solid rgba(11, 62, 128, .3);
  border-radius: 999px;
}
.nav-toggle { display: none; }

.hero {
  position: relative;
  min-height: min(920px, 100svh);
  overflow: hidden;
  isolation: isolate;
  background-color: #dff4fc;
  background-image: linear-gradient(90deg, rgba(66, 162, 204, .18), rgba(255,255,255,.18) 50%, rgba(52, 159, 202, .18)), url("assets/hero-bg.jpg");
  background-size: cover;
  background-position: center;
}
.hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -8%;
  background:
    radial-gradient(circle at 52% 31%, rgba(255,255,255,.48), transparent 36%),
    radial-gradient(circle at 19% 48%, rgba(84,204,239,.16), transparent 29%),
    radial-gradient(circle at 84% 42%, rgba(116,215,243,.14), transparent 31%);
  opacity: .32;
  transform: translate3d(0, 0, 0) scale(1);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  inset: auto 0 0;
  height: 22%;
  background: linear-gradient(to top, rgba(6, 78, 131, .18), transparent);
}
.hero-glow {
  position: absolute;
  z-index: -1;
  top: 12%;
  left: 44%;
  width: 26vw;
  aspect-ratio: 1;
  border-radius: 50%;
  background: rgba(255,255,255,.78);
  filter: blur(80px);
}
.hero-face {
  position: absolute;
  z-index: -1;
  left: max(-120px, -6vw);
  bottom: -3%;
  width: min(55vw, 820px);
  height: 91%;
  object-fit: contain;
  object-position: left bottom;
  filter: drop-shadow(30px 20px 50px rgba(31, 94, 134, .13));
}
.hero-city {
  position: absolute;
  z-index: -1;
  right: -4vw;
  bottom: -1%;
  width: min(54vw, 860px);
  max-height: 54%;
  object-fit: contain;
  object-position: right bottom;
  opacity: .95;
}
.hero-grid {
  position: relative;
  width: min(1500px, 100% - 48px);
  min-height: min(920px, 100svh);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr minmax(480px, 1.1fr) 1fr;
  align-items: center;
  padding: 116px 0 70px;
}
.hero-copy {
  position: absolute;
  z-index: 1;
  top: 50%;
  left: 50%;
  width: min(920px, 72vw);
  text-align: center;
  transform: translate(-50%, -50%);
}
.hero-logos {
  width: min(620px, 92%);
  min-height: 76px;
  margin: 0 auto 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(36px, 5vw, 72px);
}
.hero-logos img { width: auto; max-width: 56%; max-height: 76px; }
.hero-logos img:last-child { max-width: 34%; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 24px;
  justify-content: center;
  margin: 0 0 15px;
  color: var(--navy);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .55em;
}
.eyebrow::before, .eyebrow::after { content: ""; width: 70px; height: 1px; background: currentColor; }
.hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(58px, 7.4vw, 128px);
  font-weight: 400;
  letter-spacing: -.055em;
  line-height: .82;
  color: #0b3c7e;
  white-space: nowrap;
}
.hero-title-line { color: #0b3c7e; font-size: 1em; vertical-align: baseline; }
.hero-title-x { display: inline-block; margin: 0 .08em; color: #63a8c7; font-size: .48em; vertical-align: .23em; }
.hero-subtitle {
  margin: 22px 0 15px;
  color: #65a4c1;
  font-size: clamp(16px, 1.75vw, 28px);
  font-weight: 600;
  letter-spacing: .22em;
}
.ornament { width: 260px; height: 22px; object-fit: contain; margin: 15px auto 21px; }
.hero-zh { margin: 0; color: var(--navy); font-size: clamp(16px, 1.4vw, 22px); line-height: 1.8; letter-spacing: .04em; }
.hero-zh span { color: #5a9bb8; }
.hero-actions { display: flex; justify-content: center; gap: 12px; margin-top: 34px; }

@media (prefers-reduced-motion: no-preference) {
  .hero-copy > * {
    animation: hero-copy-reveal 820ms cubic-bezier(.22, 1, .36, 1) both;
  }
  .hero-copy > :nth-child(1) { animation-delay: 80ms; }
  .hero-copy > :nth-child(2) { animation-delay: 180ms; }
  .hero-copy > :nth-child(3) { animation-delay: 290ms; }
  .hero-copy > :nth-child(4) { animation-delay: 410ms; }
  .hero-copy > :nth-child(5) { animation-delay: 500ms; }
  .hero-copy > :nth-child(6) { animation-delay: 590ms; }
  .hero-copy > :nth-child(7) { animation-delay: 710ms; }

  .hero::before {
    animation: hero-ambient-light 10s ease-in-out 1.8s infinite alternate;
  }
  .hero-glow {
    animation: hero-glow-breathe 8s ease-in-out 1.8s infinite alternate;
  }
  .hero-face {
    animation: hero-face-breathe 9s ease-in-out 1.9s infinite alternate;
  }
  .hero-city {
    animation: hero-city-breathe 12s ease-in-out 2.1s infinite alternate;
  }
  .scroll-cue {
    animation: hero-cue-breathe 3.4s ease-in-out 1.8s infinite;
  }
  .scroll-cue span {
    transform-origin: center top;
    animation: hero-cue-line 3.4s ease-in-out 1.8s infinite;
  }
  .hero::before, .hero-glow, .hero-face, .hero-city, .scroll-cue, .scroll-cue span {
    animation-fill-mode: backwards;
  }

  @keyframes hero-copy-reveal {
    from { opacity: 0; transform: translate3d(0, 24px, 0); }
    to { opacity: 1; transform: translate3d(0, 0, 0); }
  }

  @keyframes hero-ambient-light {
    from { opacity: .28; transform: translate3d(-1.2%, .5%, 0) scale(1); }
    to { opacity: .58; transform: translate3d(1.2%, -1%, 0) scale(1.035); }
  }

  @keyframes hero-glow-breathe {
    from { opacity: .68; transform: translate3d(-1.2%, 1%, 0) scale(.96); }
    to { opacity: 1; transform: translate3d(1.2%, -1%, 0) scale(1.06); }
  }

  @keyframes hero-face-breathe {
    from { transform: translate3d(0, 3px, 0) scale(1); }
    to { transform: translate3d(0, -4px, 0) scale(1.008); }
  }

  @keyframes hero-city-breathe {
    from { transform: translate3d(3px, 2px, 0) scale(.995); }
    to { transform: translate3d(-2px, -2px, 0) scale(1.008); }
  }

  @keyframes hero-cue-breathe {
    0%, 100% { opacity: .52; transform: translate3d(-50%, 0, 0); }
    50% { opacity: .88; transform: translate3d(-50%, 4px, 0); }
  }

  @keyframes hero-cue-line {
    0%, 100% { opacity: .5; transform: scaleY(.72); }
    50% { opacity: 1; transform: scaleY(1); }
  }
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 999px;
  text-decoration: none;
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--navy); color: #fff; box-shadow: 0 12px 28px rgba(11, 62, 128, .2); }
.button-primary:hover { background: #125393; box-shadow: 0 16px 34px rgba(11, 62, 128, .24); }
.button-ghost { border-color: rgba(11, 62, 128, .28); color: var(--navy); background: rgba(255,255,255,.35); }
.hero-date {
  position: absolute;
  z-index: 2;
  top: 104px;
  right: clamp(0px, 1vw, 16px);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 16px 10px;
  border: 1px solid rgba(11, 62, 128, .13);
  border-radius: 999px;
  color: var(--navy);
  background: rgba(255,255,255,.28);
  backdrop-filter: blur(8px);
  text-shadow: 0 1px 14px rgba(255,255,255,.45);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .14em;
  line-height: 1;
}
.hero-date span:first-child { font-family: var(--serif); font-size: 20px; font-weight: 500; letter-spacing: .01em; }
.hero-date span + span::before { content: "·"; margin-right: 10px; color: #65a4c1; }
.hero-location {
  grid-column: 3;
  justify-self: end;
  align-self: end;
  margin: 0 1vw 5vh 0;
  color: rgba(255,255,255,.92);
  text-align: right;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .2em;
  line-height: 1.8;
  text-shadow: 0 2px 16px rgba(4, 44, 84, .3);
}
.scroll-cue {
  position: absolute;
  z-index: 2;
  left: 50%;
  bottom: 20px;
  display: grid;
  gap: 8px;
  justify-items: center;
  color: rgba(7, 53, 107, .7);
  text-decoration: none;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .2em;
}
.scroll-cue span { display: block; width: 1px; height: 28px; background: currentColor; }

.event-strip { position: relative; z-index: 4; background: var(--deep); color: #fff; }
.event-strip-inner {
  width: min(var(--max), 100% - 48px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr) .8fr;
}
.event-strip article, .strip-link { min-height: 170px; padding: 34px clamp(20px, 3vw, 44px); border-right: 1px solid rgba(255,255,255,.13); }
.event-strip article:first-child { border-left: 1px solid rgba(255,255,255,.13); }
.meta-label { display: block; margin-bottom: 14px; color: #76c2df; font-size: 10px; font-weight: 700; letter-spacing: .2em; }
.event-strip strong { display: block; font-family: var(--serif); font-size: 21px; font-weight: 400; line-height: 1.25; }
.event-strip small { display: block; margin-top: 12px; color: rgba(255,255,255,.56); font-size: 11px; letter-spacing: .04em; }
.strip-link { display: flex; flex-direction: column; justify-content: space-between; color: #fff; text-decoration: none; font-size: 12px; font-weight: 700; letter-spacing: .08em; }
.strip-link span { align-self: flex-end; color: #73c7e4; font-size: 30px; transition: transform .2s; }
.strip-link:hover span { transform: translate(5px, 5px); }

.section-shell { width: min(var(--max), 100% - 48px); margin: 0 auto; }
.intro { padding: 120px 0 130px; }
.section-kicker { color: #4b9abc; font-size: 11px; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; }
.intro-layout { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(260px, .9fr) minmax(250px, .68fr); gap: clamp(36px, 5vw, 76px); align-items: center; margin-top: 42px; }
.intro h2, .section-heading h2, .venue-copy h2 {
  margin: 0;
  font-family: var(--serif);
  color: var(--navy);
  font-size: clamp(52px, 7vw, 94px);
  font-weight: 400;
  letter-spacing: -.04em;
  line-height: .96;
}
.intro-copy { max-width: 580px; color: #46657f; font-size: 16px; line-height: 1.95; }
.intro-copy p { margin: 0 0 1.2em; }
.intro-visual {
  position: relative;
  align-self: stretch;
  min-height: 390px;
  margin: -38px 0 -24px;
  display: grid;
  place-items: center;
  isolation: isolate;
}
.intro-visual::before {
  content: "";
  position: absolute;
  z-index: -1;
  width: 95%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(105, 196, 225, .24), rgba(225, 246, 253, .13) 48%, transparent 72%);
  filter: blur(2px);
}
.intro-visual.has-motion::before { display: none; }
.intro-visual img,
.intro-visual video { width: min(330px, 100%); max-height: 430px; object-fit: contain; }
.intro-visual img { filter: drop-shadow(0 28px 34px rgba(24, 99, 145, .16)); }
.intro-motion { display: block; background: var(--paper); }
.intro-visual figcaption { position: absolute; right: 0; bottom: 20px; color: #5798b4; font-size: 9px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; writing-mode: vertical-rl; }
.track-grid { margin-top: 90px; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.track-grid article { position: relative; min-height: 270px; padding: 30px; border-right: 1px solid var(--line); overflow: hidden; transition: background .2s; }
.track-grid article:first-child { border-left: 1px solid var(--line); }
.track-grid article:hover { background: #edf8fc; }
.track-grid article > :not(.track-art) { position: relative; z-index: 1; }
.track-grid span { color: #55a8c8; font-size: 11px; font-weight: 700; }
.track-grid h3 { margin: 46px 0 24px; color: var(--navy); font-family: var(--serif); font-size: 40px; font-weight: 400; line-height: .96; }
.track-grid p { margin: 0; color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.track-art {
  position: absolute;
  z-index: 0;
  right: -8%;
  bottom: -9%;
  width: 92%;
  height: 95%;
  object-fit: contain;
  object-position: right bottom;
  opacity: .13;
  mix-blend-mode: multiply;
  pointer-events: none;
  transition: opacity .25s ease, transform .35s ease;
}
.track-grid article:hover .track-art { opacity: .2; transform: scale(1.025); }

.faculty-section {
  padding: 120px 0 130px;
  color: #fff;
  background: radial-gradient(circle at 86% 8%, rgba(49, 139, 183, .28), transparent 25%), linear-gradient(145deg, #073a7b 0%, #042450 72%);
}
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 54px; }
.section-heading > p { max-width: 430px; margin: 0 0 7px; color: var(--muted); line-height: 1.7; }
.heading-light h2 { color: #fff; }
.heading-light > p { color: rgba(255,255,255,.62); }
.faculty-tools { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 28px; }
.search-field { width: min(420px, 100%); }
.search-field input { width: 100%; padding: 15px 18px; border: 1px solid rgba(255,255,255,.2); border-radius: 999px; outline: none; background: rgba(255,255,255,.06); color: #fff; }
.search-field input::placeholder { color: rgba(255,255,255,.5); }
.search-field input:focus { border-color: #72c1df; box-shadow: 0 0 0 3px rgba(114,193,223,.16); }
#faculty-count { color: rgba(255,255,255,.52); font-size: 11px; letter-spacing: .08em; }
.faculty-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.faculty-card { position: relative; min-width: 0; overflow: hidden; border: 1px solid rgba(255,255,255,.12); border-radius: 2px; background: rgba(255,255,255,.05); }
.faculty-photo { position: relative; aspect-ratio: 1; overflow: hidden; background: #174c7d; }
.faculty-photo img { width: 100%; height: 100%; object-fit: cover; object-position: center top; filter: saturate(.82) contrast(1.02); transition: transform .45s ease, filter .45s ease; }
.faculty-card:hover .faculty-photo img { transform: scale(1.025); filter: saturate(1) contrast(1.02); }
.faculty-info { min-height: 84px; padding: 15px 14px 13px; }
.faculty-info h3 { margin: 0 0 7px; font-family: var(--serif); font-size: 18px; font-weight: 400; line-height: 1.15; }
.faculty-info p { margin: 0; color: rgba(255,255,255,.55); font-size: 11px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.faculty-actions { display: flex; justify-content: center; margin-top: 44px; }
.button-light { border-color: rgba(255,255,255,.28); background: transparent; color: #fff; }
.button-light:hover { background: #fff; color: var(--navy); }
.faculty-card[hidden] { display: none; }

.program-section { padding: 120px 0 130px; }
.program-mobile-hint { display: none; }
.day-tabs { display: grid; grid-template-columns: repeat(4, 1fr); margin-bottom: 42px; border-bottom: 1px solid var(--line); }
.day-tab { position: relative; padding: 22px 12px 20px; border: 0; border-right: 1px solid var(--line); background: transparent; cursor: pointer; text-align: left; }
.day-tab:first-child { border-left: 1px solid var(--line); }
.day-tab span { display: block; color: #4e9abb; font-size: 10px; font-weight: 700; letter-spacing: .15em; }
.day-tab strong { display: block; margin-top: 8px; color: var(--navy); font-family: var(--serif); font-size: clamp(20px, 2.3vw, 31px); font-weight: 400; }
.day-tab[aria-selected="true"] { background: var(--navy); }
.day-tab[aria-selected="true"] span { color: #89d1ea; }
.day-tab[aria-selected="true"] strong { color: #fff; }
.agenda-head { display: grid; grid-template-columns: 150px 1fr 300px; padding: 0 24px 12px; color: #70869b; font-size: 10px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
.agenda-list { border-top: 1px solid var(--line); }
.agenda-session { display: grid; grid-template-columns: 150px 1fr; gap: 0; padding: 30px 24px; border-bottom: 1px solid var(--line); background: linear-gradient(90deg, rgba(70, 159, 195, .12), transparent); }
.session-code { color: #4a9abd; font-size: 11px; font-weight: 700; letter-spacing: .15em; text-transform: uppercase; }
.session-title h3 { margin: 0; color: var(--navy); font-family: var(--serif); font-size: 31px; font-weight: 400; line-height: 1.1; }
.session-title p { margin: 9px 0 0; color: #617b91; font-size: 12px; line-height: 1.6; }
.agenda-row { display: grid; grid-template-columns: 150px 1fr 300px; gap: 0; align-items: center; min-height: 92px; padding: 18px 24px; border-bottom: 1px solid var(--line); transition: background .15s; }
.agenda-row:hover { background: #eef9fd; }
.agenda-time { color: #3b84a4; font-size: 13px; font-weight: 700; font-variant-numeric: tabular-nums; }
.agenda-topic { padding-right: 36px; color: #183f65; font-size: 15px; line-height: 1.55; }
.agenda-speaker { color: #59728a; font-size: 13px; line-height: 1.45; }
.agenda-speaker-inner { display: flex; align-items: center; gap: 12px; }
.speaker-avatars { display: flex; flex: 0 0 auto; padding-left: 10px; }
.speaker-avatar { width: 54px; height: 54px; margin-left: -10px; overflow: hidden; border: 2px solid var(--paper); border-radius: 50%; background: #dbeef6; box-shadow: 0 5px 14px rgba(7, 61, 112, .16); }
.speaker-avatar img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: center 18%; transform: scale(1.5); transform-origin: center 18%; }
.speaker-name { min-width: 0; }
.agenda-row.is-break { min-height: 66px; background: rgba(105, 189, 219, .09); }
.agenda-row.is-break .agenda-topic { color: #3e85a5; font-weight: 700; }
.agenda-summary { display: flex; justify-content: space-between; align-items: end; gap: 20px; margin-bottom: 26px; }
.agenda-summary h3 { margin: 0; color: var(--navy); font-family: var(--serif); font-size: 34px; font-weight: 400; }
.agenda-summary p { margin: 7px 0 0; color: var(--muted); font-size: 13px; }
.agenda-summary span { color: #4a94b6; font-size: 11px; font-weight: 700; letter-spacing: .1em; }
.venue-section { --venue-paper: #f5fbfd; min-height: 610px; display: grid; grid-template-columns: 1.15fr .85fr; background: var(--venue-paper); overflow: hidden; }
.venue-visual { position: relative; min-height: 610px; background: var(--venue-paper); }
.venue-visual img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.venue-copy { display: flex; flex-direction: column; justify-content: center; padding: 70px clamp(32px, 6vw, 110px); background: var(--venue-paper); }
.venue-copy h2 { margin-top: 24px; font-size: clamp(44px, 5vw, 72px); }
.venue-copy > p { margin: 16px 0 0; color: #6397ae; font-size: 18px; letter-spacing: .1em; }
.venue-meta { display: grid; gap: 9px; margin: 34px 0; color: #4d6f89; font-size: 13px; }
.venue-copy .button { align-self: flex-start; }

.site-footer { padding: 70px max(24px, 6vw) 24px; color: #fff; background: #032450; }
.footer-main { display: grid; grid-template-columns: 280px 1fr auto; gap: 50px; align-items: center; max-width: var(--max); margin: 0 auto; }
.footer-logos { display: flex; align-items: center; gap: 28px; }
.footer-logos img { width: auto; max-width: 58%; max-height: 44px; filter: brightness(0) invert(1); opacity: .92; }
.footer-logos img:last-child { max-width: 34%; }
.footer-main p { margin: 0; font-family: var(--serif); font-size: 26px; line-height: 1.3; }
.footer-links { display: grid; gap: 10px; text-align: right; }
.footer-links a { color: rgba(255,255,255,.7); text-decoration: none; font-size: 12px; }
.footer-links a:hover { color: #8fd1e8; }
.footer-note { max-width: var(--max); margin: 50px auto 0; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.42); font-size: 10px; letter-spacing: .15em; text-transform: uppercase; }

@media (min-width: 1101px) {
  .hero-copy { left: 62%; width: min(820px, 68vw); }
  .hero-logos { width: min(540px, 88%); margin-bottom: 22px; }
  .hero h1 { font-size: clamp(64px, 5.8vw, 104px); }
  .hero-subtitle { margin: 18px 0 10px; }
  .ornament { margin: 10px auto 16px; }
  .hero-actions { margin-top: 24px; }
}

@media (max-width: 1100px) {
  .hero-grid { grid-template-columns: .6fr minmax(480px, 1.2fr) .6fr; }
  .hero-face { width: 58vw; opacity: .78; }
  .hero-city { width: 60vw; opacity: .74; }
  .faculty-grid { grid-template-columns: repeat(4, 1fr); }
  .agenda-head, .agenda-row { grid-template-columns: 130px 1fr 250px; }
  .agenda-session { grid-template-columns: 130px 1fr; }
}

@media (max-width: 820px) {
  .site-header { min-height: 68px; padding: 0 20px; }
  .nav-toggle { display: block; padding: 8px 0; border: 0; background: none; color: var(--navy); font-size: 11px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
  .site-nav { position: absolute; top: 68px; left: 16px; right: 16px; display: none; align-items: stretch; padding: 14px; border: 1px solid var(--line); border-radius: 6px; background: rgba(250,254,255,.97); box-shadow: 0 20px 48px rgba(4,42,90,.14); }
  .site-nav.is-open { display: grid; }
  .site-nav a { padding: 13px 10px; }
  .nav-cta { text-align: center; }

  .hero { min-height: 800px; }
  .hero-grid { width: min(100% - 32px, 680px); min-height: 800px; display: flex; flex-direction: column; justify-content: center; padding: 96px 0 120px; }
  .hero-copy { position: relative; top: auto; left: auto; width: 100%; transform: none; }
  .hero-logos { width: min(390px, 78%); min-height: 48px; margin-bottom: 32px; }
  .hero-logos img { max-height: 48px; }
  .hero h1 { font-size: clamp(48px, 12vw, 76px); white-space: normal; }
  .hero-face { left: -24%; bottom: 0; width: 82vw; height: 55%; opacity: .48; }
  .hero-city { right: -16%; width: 80vw; max-height: 42%; opacity: .56; }
  .hero-date, .hero-location { display: none; }
  .hero-actions { position: relative; z-index: 2; }
  .scroll-cue { bottom: 16px; }

  .event-strip-inner { grid-template-columns: repeat(2, 1fr); width: 100%; }
  .event-strip article, .strip-link { min-height: 150px; border-bottom: 1px solid rgba(255,255,255,.13); }
  .event-strip article:first-child { border-left: 0; }

  .intro-layout { grid-template-columns: 1fr; gap: 40px; }
  .intro-visual { min-height: 330px; margin: -8px 0 -14px; }
  .intro-visual img,
  .intro-visual video { max-height: 350px; }
  .track-grid { grid-template-columns: repeat(2, 1fr); }
  .track-grid article:nth-child(2) { border-right: 0; }
  .track-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section-heading { align-items: start; flex-direction: column; }
  .faculty-grid { grid-template-columns: repeat(3, 1fr); }
  .day-tabs { grid-template-columns: repeat(2, 1fr); }
  .day-tab:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .agenda-head { display: none; }
  .agenda-row { grid-template-columns: 110px 1fr; min-height: 0; align-items: start; }
  .agenda-topic { padding-right: 0; }
  .agenda-speaker { grid-column: 2; margin-top: 10px; }
  .agenda-session { grid-template-columns: 110px 1fr; }
  .venue-section { grid-template-columns: 1fr; }
  .venue-visual { min-height: 380px; }
  .venue-copy { min-height: 520px; }
  .footer-main { grid-template-columns: 180px 1fr; }
  .footer-links { grid-column: 1 / -1; text-align: left; }
}

@media (max-width: 540px) {
  .section-shell { width: min(100% - 30px, var(--max)); }
  .hero {
    min-height: max(840px, 100svh);
    background-size: auto 100%;
    background-position: center;
  }
  .hero::before {
    inset: 0;
    background:
      linear-gradient(to bottom, rgba(255,255,255,.92) 0%, rgba(255,255,255,.58) 47%, rgba(207,238,250,.08) 70%, rgba(6,76,129,.17) 100%),
      radial-gradient(circle at 50% 28%, rgba(255,255,255,.94), transparent 52%);
    opacity: 1;
  }
  .hero-grid {
    width: 100%;
    min-height: max(840px, 100svh);
    display: block;
    padding: 0;
  }
  .hero-copy {
    position: absolute;
    z-index: 3;
    top: 52px;
    left: 50%;
    width: calc(100% - 30px);
    transform: translateX(-50%);
  }
  .hero-logos {
    width: 72%;
    min-height: 50px;
    margin-bottom: 82px;
    gap: 26px;
  }
  .hero-logos img { max-height: 50px; }
  .eyebrow { margin-bottom: 10px; gap: 15px; font-size: 11px; letter-spacing: .48em; }
  .eyebrow::before, .eyebrow::after { width: 48px; }
  .hero h1 { font-size: clamp(50px, 14.4vw, 58px); line-height: .77; letter-spacing: -.04em; }
  .hero-title-line { display: block; }
  .hero-title-x { margin: 0 .08em 0 0; font-size: .42em; vertical-align: .18em; }
  .hero-subtitle { margin: 19px 0 10px; font-size: 14px; letter-spacing: .14em; }
  .ornament { width: 150px; height: 14px; margin: 8px auto 10px; }
  .hero-zh { font-size: 13px; line-height: 1.65; text-shadow: 0 1px 8px rgba(255,255,255,.95); }
  .hero-actions { z-index: 4; gap: 9px; margin-top: 18px; padding: 0 22px; }
  .hero-actions .button { flex: 1; min-height: 43px; padding: 0 14px; font-size: 11px; }
  .hero-face {
    left: -28%;
    bottom: -128px;
    width: min(122vw, 510px);
    height: auto;
    max-width: none;
    opacity: 1;
  }
  .hero-city {
    right: -19%;
    bottom: -15px;
    width: 76vw;
    max-width: none;
    max-height: none;
    opacity: .96;
  }
  .hero-date {
    top: 113px;
    right: auto;
    left: 50%;
    display: flex;
    transform: translateX(-50%);
    padding: 10px 17px 9px;
    background: rgba(243,251,254,.66);
    white-space: nowrap;
  }
  .hero-location { display: block; position: absolute; z-index: 3; right: 15px; bottom: 17px; margin: 0; font-size: 6px; letter-spacing: .12em; }
  .scroll-cue { display: none; }
  .event-strip-inner { grid-template-columns: 1fr; }
  .event-strip article, .strip-link { min-height: 135px; border-right: 0; }
  .strip-link { min-height: 105px; }
  .intro, .faculty-section, .program-section { padding: 88px 0; }
  .intro h2, .section-heading h2 { font-size: 52px; }
  .track-grid { grid-template-columns: 1fr; }
  .track-grid article { min-height: 210px; border-right: 0; border-bottom: 1px solid var(--line); }
  .track-grid article:first-child { border-left: 0; }
  .track-grid h3 { margin-top: 30px; }
  .faculty-tools { align-items: stretch; flex-direction: column; }
  .faculty-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .faculty-info { min-height: 90px; padding: 14px 12px; }
  .faculty-info h3 { font-size: 17px; }
  .faculty-info p { font-size: 9px; }
  .program-mobile-hint { display: block; margin: -4px 0 13px; color: #5c7893; font-size: 12px; font-weight: 700; letter-spacing: .08em; }
  .day-tabs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; margin-bottom: 30px; border: 0; overflow: visible; }
  .day-tab,
  .day-tab:first-child {
    min-width: 0;
    min-height: 88px;
    padding: 14px 13px 13px;
    border: 1px solid rgba(8,54,110,.15);
    border-radius: 12px;
    background: rgba(255,255,255,.68);
    box-shadow: 0 8px 20px rgba(8,54,110,.05);
  }
  .day-tab:nth-child(-n+2) { border-bottom: 1px solid rgba(8,54,110,.15); }
  .day-tab span { font-size: 9px; letter-spacing: .11em; }
  .day-tab strong { margin-top: 7px; font-size: 20px; line-height: 1.05; }
  .day-tab[aria-selected="true"] { border-color: var(--navy); background: var(--navy); box-shadow: 0 12px 28px rgba(11,62,128,.19); }
  .day-tab:focus-visible { outline: 3px solid rgba(77,167,204,.38); outline-offset: 3px; }
  .agenda-summary { align-items: start; flex-direction: column; }
  .agenda-row, .agenda-session { grid-template-columns: 1fr; gap: 10px; padding: 20px 16px; }
  .agenda-speaker { grid-column: 1; }
  .session-title h3 { font-size: 25px; }
  .venue-copy { padding: 58px 24px; }
  .footer-main { grid-template-columns: 1fr; }
  .footer-logos { width: min(290px, 100%); }
}

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