:root {
  --ink: #12212e;
  --muted: #5b6975;
  --blue: #0b4778;
  --blue-dark: #062f52;
  --cyan: #46b8d7;
  --gold: #f5c451;
  --paper: #f5f8fa;
  --white: #ffffff;
  --line: #dce6ec;
  --shadow: 0 24px 70px rgba(6, 47, 82, .14);
  --radius: 24px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--white); font-family: "DM Sans", "Microsoft YaHei", sans-serif; font-size: 16px; line-height: 1.65; }
img { display: block; max-width: 100%; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 1000; background: var(--gold); color: var(--blue-dark); padding: .7rem 1rem; font-weight: 700; border-radius: 6px; }
.skip-link:focus { top: 1rem; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 100; color: var(--white); transition: background .25s ease, box-shadow .25s ease; }
.site-header.scrolled { background: rgba(6, 35, 59, .96); box-shadow: 0 8px 30px rgba(0,0,0,.18); backdrop-filter: blur(14px); }
.header-inner { width: min(1220px, calc(100% - 3rem)); height: 84px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.brand { display: flex; align-items: center; gap: .75rem; text-decoration: none; line-height: 1.05; min-width: 205px; }
.brand strong { display: block; font: 700 1rem/1.1 "Libre Franklin", sans-serif; letter-spacing: .02em; }
.brand small { display: block; margin-top: .28rem; color: rgba(255,255,255,.68); font-size: .72rem; text-transform: uppercase; letter-spacing: .15em; }
.brand-mark { position: relative; width: 36px; height: 36px; display: block; }
.brand-mark i { position: absolute; width: 20px; height: 20px; border: 2px solid var(--gold); transform: rotate(30deg); border-radius: 5px; }
.brand-mark i:nth-child(1) { left: 0; top: 7px; }
.brand-mark i:nth-child(2) { right: 0; top: 7px; }
.brand-mark i:nth-child(3) { left: 8px; top: 0; border-color: rgba(255,255,255,.78); }
#site-nav { display: flex; align-items: center; gap: 1.6rem; }
#site-nav a { position: relative; text-decoration: none; font-weight: 600; font-size: .88rem; letter-spacing: .01em; }
#site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -.5rem; height: 2px; background: var(--gold); transition: right .2s ease; }
#site-nav a:hover::after, #site-nav a:focus-visible::after { right: 0; }
.menu-button { display: none; }

.hero {
  position: relative;
  min-height: 0;
  height: auto;
  max-height: none;
  padding-top: 84px;
  overflow: hidden;
  color: var(--white);
  background: var(--blue-dark);
}
.hero > img {
  position: relative;
  width: 100%;
  height: auto;
  object-fit: contain;
  object-position: center;
  filter: saturate(.92) contrast(1.04);
}
.hero-shade {
  position: absolute;
  z-index: 1;
  top: 84px;
  right: 0;
  bottom: 84px;
  left: 0;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 55%, rgba(3,28,50,.46) 100%);
}
.hero-content {
  position: absolute;
  z-index: 2;
  left: 50%;
  bottom: 104px;
  width: min(1220px, calc(100% - 3rem));
  margin: 0;
  padding: 0;
  transform: translateX(-50%);
}
.eyebrow, .section-kicker { margin: 0 0 1.15rem; color: var(--gold); font-size: .78rem; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.hero h1 { max-width: 800px; margin: 0; font: 800 clamp(3rem, 6.2vw, 6rem)/.98 "Libre Franklin", sans-serif; letter-spacing: -.055em; text-wrap: balance; text-shadow: 0 4px 28px rgba(0,0,0,.26); }
.hero h1 span { display: block; font-size: .47em; line-height: 1.2; letter-spacing: -.035em; }
.hero-cn { margin: 1.4rem 0 0; font-size: clamp(1.05rem, 2vw, 1.35rem); letter-spacing: .25em; font-weight: 500; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2.4rem; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; border-radius: 999px; padding: .75rem 1.25rem; font-weight: 700; text-decoration: none; transition: transform .2s ease, background .2s ease, box-shadow .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--gold); color: #173147; box-shadow: 0 12px 26px rgba(245,196,81,.23); }
.button-primary:hover { background: #ffcf60; }
.button-ghost { border: 1px solid rgba(255,255,255,.55); background: rgba(6,47,82,.25); color: var(--white); backdrop-filter: blur(8px); }
.hero-meta { position: relative; z-index: 2; bottom: auto; left: auto; transform: none; width: min(1220px, calc(100% - 3rem)); margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(255,255,255,.35); }
.hero-meta > div { display: flex; align-items: center; gap: 1rem; padding: 1.4rem 1rem; border-right: 1px solid rgba(255,255,255,.24); }
.hero-meta > div:first-child { padding-left: 0; }
.hero-meta > div:last-child { border: 0; }
.hero-meta > div > span { color: var(--gold); font: 700 .7rem "Libre Franklin", sans-serif; }
.hero-meta p { margin: 0; font-size: .9rem; color: rgba(255,255,255,.76); line-height: 1.35; }
.hero-meta strong { display: block; color: var(--white); font-size: .7rem; text-transform: uppercase; letter-spacing: .12em; margin-bottom: .3rem; }

.countdown-band { background: var(--blue-dark); color: var(--white); padding: 2rem max(1.5rem, calc((100vw - 1220px)/2)); display: flex; justify-content: space-between; align-items: center; gap: 2rem; }
.countdown-band .section-kicker { margin-bottom: .2rem; }
.countdown-note { margin: 0; color: rgba(255,255,255,.7); }
.countdown { display: flex; align-items: center; gap: clamp(1.5rem, 4vw, 4rem); }
.countdown div { text-align: center; min-width: 58px; }
.countdown strong { display: block; font: 700 clamp(1.8rem, 4vw, 3.15rem)/1 "Libre Franklin", sans-serif; color: var(--gold); }
.countdown span { font-size: .72rem; text-transform: uppercase; letter-spacing: .12em; color: rgba(255,255,255,.65); }

.section { padding: 7.5rem max(1.5rem, calc((100vw - 1220px)/2)); }
.section-heading { max-width: 760px; margin-bottom: 3.3rem; }
.section-heading h2, .program-intro h2, .submission h2, .venue h2 { margin: 0; font: 700 clamp(2.15rem, 4.4vw, 4rem)/1.08 "Libre Franklin", sans-serif; letter-spacing: -.045em; text-wrap: balance; }
.section-heading > p:last-child, .program-intro > p:last-child { color: var(--muted); font-size: 1.05rem; max-width: 680px; }
.about { background: var(--paper); }
.about-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(2rem, 6vw, 6rem); align-items: start; }
.lead-copy { font-size: clamp(1.1rem, 2vw, 1.35rem); line-height: 1.7; }
.lead-copy p:first-child { margin-top: 0; }
.theme-card { position: relative; padding: 2.3rem; color: var(--white); background: var(--blue); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.theme-card::after { content: ""; position: absolute; width: 170px; height: 170px; right: -60px; bottom: -70px; border: 24px solid rgba(70,184,215,.2); border-radius: 50%; }
.theme-card span { color: var(--gold); font-weight: 700; font-size: .75rem; letter-spacing: .13em; text-transform: uppercase; }
.theme-card h3 { position: relative; z-index: 1; margin: 1rem 0 1.6rem; font: 600 clamp(1.4rem, 2.4vw, 2rem)/1.3 "Libre Franklin", sans-serif; }
.theme-card p { margin: 0; color: rgba(255,255,255,.72); }
.organizers { margin-top: 5rem; border-top: 1px solid var(--line); padding-top: 2.2rem; }
.organizers > p { font-weight: 800; font-size: .74rem; letter-spacing: .16em; text-transform: uppercase; color: var(--blue); }
.organizers ul { list-style: none; padding: 0; margin: 1.5rem 0 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; }
.organizers li { font-weight: 700; line-height: 1.4; border-left: 3px solid var(--gold); padding-left: 1rem; }
.organizers li span { display: block; margin-top: .45rem; color: var(--muted); font-weight: 500; font-size: .84rem; }
.chairs { display: grid; grid-template-columns: 180px 1fr; gap: 2rem; align-items: start; margin-top: 2.4rem; padding: 2rem; border-radius: 18px; background: var(--white); border: 1px solid var(--line); }
.chairs > p { margin: .2rem 0 0; color: var(--blue); font-size: .74rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.chairs > div { display: flex; flex-wrap: wrap; gap: .7rem; }
.chairs span { display: inline-flex; align-items: center; min-height: 38px; padding: .45rem .9rem; border-radius: 999px; color: var(--blue-dark); background: #e8f3f7; font-weight: 700; }

.topics { color: var(--white); background: var(--blue-dark); position: relative; overflow: hidden; }
.topics::before { content: ""; position: absolute; inset: 0; opacity: .13; background-image: radial-gradient(circle at 1px 1px, var(--cyan) 1px, transparent 0); background-size: 36px 36px; }
.topics > * { position: relative; }
.section-heading.light > p:last-child { color: rgba(255,255,255,.67); }
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; align-items: stretch; }
.topic-card { display: flex; min-height: 100%; flex-direction: column; padding: 2.2rem; color: var(--white); background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.13); border-radius: var(--radius); text-decoration: none; backdrop-filter: blur(8px); transition: color .25s ease, background .25s ease, border-color .25s ease, transform .25s ease, box-shadow .25s ease; }
.topic-card:hover, .topic-card:focus-visible { color: var(--ink); background: var(--white); border-color: var(--white); transform: translateY(-10px); box-shadow: var(--shadow); outline: none; }
.topic-number { display: inline-grid; place-items: center; width: 44px; height: 44px; border: 1px solid rgba(255,255,255,.24); border-radius: 50%; color: var(--gold); font-weight: 700; font-size: .78rem; }
.topic-card:hover .topic-number, .topic-card:focus-visible .topic-number { border-color: var(--line); color: var(--blue); }
.topic-day { margin: 2rem 0 .4rem; color: var(--cyan); text-transform: uppercase; font-size: .74rem; font-weight: 800; letter-spacing: .13em; }
.topic-card:hover .topic-day, .topic-card:focus-visible .topic-day { color: var(--blue); }
.topic-card h3 { margin: 0 0 1.4rem; min-height: 3.2em; font: 700 1.42rem/1.25 "Libre Franklin", sans-serif; }
.topic-card ul { margin: 0; padding: 0; list-style: none; }
.topic-card li { position: relative; padding: .75rem 0 .75rem 1.2rem; border-top: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.76); }
.topic-card:hover li, .topic-card:focus-visible li { border-color: var(--line); color: var(--muted); }
.topic-card li::before { content: ""; position: absolute; left: 0; top: 1.42rem; width: 5px; height: 5px; background: var(--gold); border-radius: 50%; }
.topic-cta { display: inline-block; align-self: flex-start; margin-top: auto; padding-top: 1.5rem; color: var(--gold); font-size: .76rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.topic-card:hover .topic-cta, .topic-card:focus-visible .topic-cta { color: var(--blue); }

.speakers { background: #eef4f7; }
.speaker-showcase { display: grid; grid-template-columns: .82fr 1.18fr; gap: clamp(2.5rem, 6vw, 6rem); align-items: center; }
.speaker-showcase-copy h2 { margin: 0; font: 700 clamp(2.15rem, 4.4vw, 4rem)/1.08 "Libre Franklin", sans-serif; letter-spacing: -.045em; text-wrap: balance; }
.speaker-showcase-copy > p:not(.section-kicker) { max-width: 620px; color: var(--muted); font-size: 1.05rem; }
.speaker-session-links { margin-top: 2rem; border-top: 1px solid #cbdbe3; }
.speaker-session-links a { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: .95rem 0; border-bottom: 1px solid #cbdbe3; color: var(--blue-dark); text-decoration: none; }
.speaker-session-links a:hover, .speaker-session-links a:focus-visible { color: var(--blue); }
.speaker-session-links span { font-weight: 700; }
.speaker-session-links strong { color: var(--blue); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; }
.speaker-mosaic { display: grid; grid-template-columns: repeat(3, 1fr); gap: .85rem; }
.speaker-mosaic figure { position: relative; min-width: 0; margin: 0; overflow: hidden; aspect-ratio: 1/1.08; border-radius: 16px; background: #d8e8ef; box-shadow: 0 15px 38px rgba(6,47,82,.1); }
.speaker-mosaic img { width: 100%; height: 100%; object-fit: cover; object-position: center 20%; transition: transform .3s ease; }
.speaker-mosaic figure:hover img { transform: scale(1.035); }
.speaker-mosaic figcaption { position: absolute; right: 0; bottom: 0; left: 0; padding: 1.8rem .8rem .7rem; color: var(--white); background: linear-gradient(transparent, rgba(4,30,53,.9)); font-size: .78rem; font-weight: 700; }
.speaker-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.2rem; }
.speaker-grid article { padding: 1rem 1rem 1.4rem; background: var(--paper); border: 1px solid var(--line); border-radius: 18px; }
.portrait { aspect-ratio: 4/4.4; display: grid; place-items: center; background: linear-gradient(145deg, #d9edf5, #eef5f7); border-radius: 12px; overflow: hidden; }
.portrait::before, .portrait::after { content: ""; position: absolute; border: 1px solid rgba(11,71,120,.18); border-radius: 50%; }
.portrait::before { width: 105px; height: 105px; }
.portrait::after { width: 170px; height: 170px; }
.portrait { position: relative; }
.portrait span { position: relative; z-index: 1; color: var(--blue); font: 700 1.5rem "Libre Franklin", sans-serif; }
.speaker-grid h3 { margin: 1.15rem 0 .2rem; font: 700 1.05rem "Libre Franklin", sans-serif; }
.speaker-grid p { margin: 0; color: var(--muted); font-size: .9rem; }
.session-link-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.session-link-grid a { display: flex; min-height: 210px; flex-direction: column; justify-content: flex-end; padding: 1.8rem; color: var(--white); background: var(--blue); border: 1px solid var(--blue); border-radius: 18px; text-decoration: none; transition: color .25s ease, background .25s ease, transform .25s ease, box-shadow .25s ease; }
.session-link-grid a:hover, .session-link-grid a:focus-visible { color: var(--ink); background: var(--white); transform: translateY(-7px); box-shadow: var(--shadow); outline: none; }
.session-link-grid span { color: var(--gold); font-size: .74rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.session-link-grid strong { display: block; margin: .75rem 0 1.2rem; font: 700 1.35rem/1.3 "Libre Franklin", sans-serif; }
.session-link-grid small { color: rgba(255,255,255,.68); font-size: .82rem; font-weight: 700; }
.session-link-grid a:hover small, .session-link-grid a:focus-visible small { color: var(--blue); }

.speaker-page { background: var(--paper); }
.speaker-page .site-header { background: rgba(6,35,59,.98); }
.subpage-hero { padding: 10rem max(1.5rem, calc((100vw - 1220px)/2)) 5rem; color: var(--white); background: var(--blue-dark); }
.subpage-hero .section-kicker { margin-bottom: 1rem; }
.subpage-hero h1 { max-width: 900px; margin: 0; font: 700 clamp(2.6rem, 6vw, 5.5rem)/1.02 "Libre Franklin", sans-serif; letter-spacing: -.05em; text-wrap: balance; }
.subpage-hero p:last-child { max-width: 720px; margin: 1.5rem 0 0; color: rgba(255,255,255,.68); font-size: 1.05rem; }
.speaker-list-section { padding: 5rem max(1.5rem, calc((100vw - 1220px)/2)) 7rem; }
.speaker-list-toolbar { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 2.2rem; }
.speaker-list-toolbar h2 { margin: 0; font: 700 clamp(1.8rem, 3vw, 2.7rem)/1.1 "Libre Franklin", sans-serif; letter-spacing: -.035em; }
.speaker-list-toolbar a { color: var(--blue); font-weight: 700; text-underline-offset: .3rem; }
.speaker-list-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.35rem; align-items: start; }
.speaker-entry { overflow: hidden; background: var(--white); border: 1px solid var(--line); border-radius: 20px; box-shadow: 0 12px 36px rgba(6,47,82,.07); }
.speaker-photo-wrap { position: relative; overflow: hidden; background: #dceaf0; aspect-ratio: 4/3.35; }
.speaker-photo { width: 100%; height: 100%; object-fit: cover; object-position: center 22%; transition: transform .35s ease; }
.speaker-entry:hover .speaker-photo { transform: scale(1.025); }
.speaker-index { position: absolute; right: .85rem; bottom: .85rem; display: grid; width: 38px; height: 38px; place-items: center; border-radius: 50%; color: var(--blue-dark); background: var(--gold); font: 800 .72rem "Libre Franklin", sans-serif; box-shadow: 0 5px 18px rgba(0,0,0,.18); }
.speaker-entry-body { padding: 1.25rem 1.35rem 1.45rem; }
.speaker-entry h3 { margin: .35rem 0 .75rem; font: 700 1.22rem/1.25 "Libre Franklin", "Microsoft YaHei", sans-serif; }
.speaker-entry h3 small { display: block; margin-top: .28rem; color: var(--muted); font: 500 .76rem/1.35 "DM Sans", sans-serif; letter-spacing: .02em; }
.speaker-entry p { margin: 0; color: var(--muted); font-size: .88rem; }
.speaker-entry .speaker-status { color: var(--blue); font-size: .68rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.speaker-entry .speaker-bio { line-height: 1.72; text-align: justify; }
.speaker-list-note { max-width: 760px; margin: -1rem 0 2.2rem; color: var(--muted); }

.program { display: grid; grid-template-columns: .82fr 1.18fr; gap: clamp(3rem, 8vw, 8rem); background: var(--paper); }
.program-intro { position: sticky; top: 130px; align-self: start; }
.timeline article { display: grid; grid-template-columns: 88px 1fr; gap: 1.5rem; padding: 0 0 2.4rem; margin-bottom: 2.4rem; border-bottom: 1px solid var(--line); }
.timeline article:last-child { margin-bottom: 0; }
.date { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 88px; border-radius: 15px; color: var(--white); background: var(--blue); }
.date strong { font: 700 2rem/1 "Libre Franklin", sans-serif; }
.date span { color: var(--gold); font-size: .68rem; font-weight: 800; letter-spacing: .16em; }
.timeline p { margin: 0 0 .4rem; color: var(--blue); font-weight: 800; font-size: .74rem; letter-spacing: .13em; text-transform: uppercase; }
.timeline h3 { margin: 0 0 .5rem; font: 700 1.35rem/1.3 "Libre Franklin", sans-serif; }
.timeline div > span { color: var(--muted); }

.submission { background: var(--white); }
.submission-panel { display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(2rem, 7vw, 7rem); align-items: center; padding: clamp(2rem, 5vw, 4.5rem); border-radius: 30px; background: linear-gradient(135deg, #eaf7fb 0%, #f5f8fa 55%, #fff7e2 100%); border: 1px solid #d8eaf0; }
.submission-panel > div:first-child > p:not(.section-kicker) { color: var(--muted); font-size: 1.05rem; }
.submission-note { padding-left: 1rem; border-left: 3px solid var(--gold); }
.email-card { padding: 2rem; background: var(--blue-dark); color: var(--white); border-radius: 20px; box-shadow: var(--shadow); }
.email-card > span { display: block; color: var(--gold); text-transform: uppercase; letter-spacing: .16em; font-size: .72rem; font-weight: 800; }
.email-card > a:not(.button) { display: block; margin: 1rem 0 1.8rem; font: 600 clamp(1.35rem, 3vw, 2rem) "Libre Franklin", sans-serif; text-decoration: none; overflow-wrap: anywhere; }
.email-card .button { width: 100%; }
.email-card small { display: block; margin-top: 1rem; color: rgba(255,255,255,.6); text-align: center; }

.venue { background: var(--blue-dark); color: var(--white); }
.venue-card { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: center; }
.venue-copy address { margin: 1.8rem 0; color: rgba(255,255,255,.76); font-style: normal; font-size: 1.05rem; }
.venue-copy address span { color: rgba(255,255,255,.52); }
.text-link { display: inline-block; color: var(--gold); font-weight: 700; text-underline-offset: .35rem; }
.venue-facts { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid rgba(255,255,255,.15); border-radius: var(--radius); overflow: hidden; }
.venue-facts div { min-height: 170px; padding: 1.7rem; border-right: 1px solid rgba(255,255,255,.15); border-bottom: 1px solid rgba(255,255,255,.15); }
.venue-facts div:nth-child(2n) { border-right: 0; }
.venue-facts div:nth-child(n+3) { border-bottom: 0; }
.venue-facts span { color: var(--gold); font-size: .7rem; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.venue-facts strong { display: block; margin: .65rem 0 .35rem; font: 600 1.25rem "Libre Franklin", sans-serif; }
.venue-facts small { color: rgba(255,255,255,.58); }

.contact { background: var(--paper); }
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.contact-grid article { padding: 2rem; background: var(--white); border: 1px solid var(--line); border-radius: 18px; box-shadow: 0 12px 36px rgba(6,47,82,.06); }
.contact-grid article > span { color: var(--gold); font: 800 .75rem "Libre Franklin", sans-serif; letter-spacing: .12em; }
.contact-grid h3 { margin: .8rem 0 1.2rem; font: 700 1.2rem "Libre Franklin", "Microsoft YaHei", sans-serif; }
.contact-grid a { display: block; width: fit-content; margin-top: .45rem; color: var(--blue); font-weight: 600; text-decoration-thickness: 1px; text-underline-offset: .25rem; overflow-wrap: anywhere; }

footer { padding: 4rem max(1.5rem, calc((100vw - 1220px)/2)) 1.5rem; background: #041e35; color: var(--white); }
.footer-main { display: flex; justify-content: space-between; gap: 3rem; padding-bottom: 3rem; }
.footer-title { max-width: 560px; margin: 0 0 .5rem; font: 600 clamp(1.4rem, 3vw, 2.2rem)/1.25 "Libre Franklin", sans-serif; }
.footer-main p:not(.footer-title), .footer-main span { color: rgba(255,255,255,.55); }
.footer-main div:last-child { text-align: right; }
.footer-main div:last-child span { display: block; font-size: .72rem; text-transform: uppercase; letter-spacing: .13em; }
.footer-main div:last-child a { display: block; margin-top: .4rem; color: var(--gold); font-weight: 700; text-decoration: none; }
.footer-bottom { display: flex; justify-content: space-between; border-top: 1px solid rgba(255,255,255,.12); padding-top: 1.5rem; color: rgba(255,255,255,.43); font-size: .82rem; }
.footer-bottom a { color: rgba(255,255,255,.65); }

@media (max-width: 920px) {
  .header-inner { height: 72px; width: min(100% - 2rem, 1220px); }
  .menu-button { display: flex; width: 48px; height: 48px; border: 0; border-radius: 50%; padding: 13px; background: rgba(255,255,255,.1); flex-direction: column; justify-content: center; gap: 5px; color: transparent; }
  .menu-button span { display: block; width: 100%; height: 2px; background: white; transition: transform .2s ease, opacity .2s ease; }
  .menu-button b { position: absolute; width: 1px; height: 1px; overflow: hidden; }
  .menu-button[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-button[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .menu-button[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  #site-nav { display: none; position: absolute; top: 72px; left: 0; right: 0; padding: 1rem; background: #082e4b; flex-direction: column; align-items: stretch; gap: 0; }
  #site-nav.open { display: flex; }
  #site-nav a { padding: .8rem 1rem; }
  #site-nav a::after { display: none; }
  .hero { min-height: 0; height: auto; }
  .hero-content { width: min(100% - 2rem, 1220px); padding: 0; }
  .hero-meta { width: calc(100% - 2rem); }
  .about-grid, .program, .submission-panel, .venue-card, .speaker-showcase { grid-template-columns: 1fr; }
  .organizers ul, .speaker-grid, .speaker-list-grid, .contact-grid { grid-template-columns: 1fr 1fr; }
  .topic-grid { grid-template-columns: 1fr; }
  .topic-card:hover, .topic-card:focus-visible { transform: translateY(-5px); }
  .session-link-grid { grid-template-columns: 1fr; }
  .program-intro { position: static; }
}

@media (min-width: 621px) {
  .hero-content .eyebrow, .hero-content .hero-cn { display: none; }
  .hero-content h1 { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
}

@media (max-width: 620px) {
  .section { padding-top: 5.5rem; padding-bottom: 5.5rem; }
  .hero { min-height: 0; height: auto; max-height: none; padding-top: 72px; background: var(--blue-dark); }
  .hero > img { position: relative; top: auto; height: auto; object-fit: contain; object-position: center top; }
  .hero-shade { display: none; }
  .hero-content { position: relative; left: auto; bottom: auto; width: min(100% - 2rem, 1220px); padding: 3rem 0 2rem; transform: none; }
  .hero h1 { font-size: clamp(2.45rem, 11vw, 3.1rem); }
  .hero-cn { letter-spacing: .08em; }
  .hero-actions { align-items: stretch; flex-direction: column; max-width: 330px; }
  .hero-meta { position: relative; grid-template-columns: 1fr; bottom: auto; border: 0; padding-bottom: 1.2rem; }
  .hero-meta > div { padding: .5rem 0; border: 0; }
  .hero-meta > div:nth-child(3) { display: none; }
  .countdown-band { flex-direction: column; align-items: flex-start; }
  .countdown { width: 100%; gap: .3rem; justify-content: space-between; }
  .countdown div { min-width: auto; }
  .countdown strong { font-size: 1.8rem; }
  .organizers ul, .speaker-grid, .speaker-list-grid, .venue-facts, .contact-grid { grid-template-columns: 1fr; }
  .chairs { grid-template-columns: 1fr; gap: 1rem; padding: 1.4rem; }
  .speaker-mosaic { grid-template-columns: 1fr 1fr; }
  .speaker-list-toolbar { align-items: flex-start; flex-direction: column; }
  .venue-facts div { min-height: auto; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.15) !important; }
  .venue-facts div:last-child { border-bottom: 0 !important; }
  .timeline article { grid-template-columns: 70px 1fr; gap: 1rem; }
  .date { min-height: 72px; }
  .submission-panel { padding: 1.25rem; }
  .email-card { padding: 1.4rem; }
  .footer-main, .footer-bottom { flex-direction: column; }
  .footer-main div:last-child { text-align: left; }
}

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