:root {
  --bg: #11131c;
  --bg-deep: #080a12;
  --surface: rgba(29, 31, 41, 0.72);
  --surface-strong: rgba(50, 52, 62, 0.78);
  --line: rgba(216, 185, 255, 0.18);
  --text: #e1e1ef;
  --muted: #cec2d7;
  --primary: #d8b9ff;
  --cyan: #7df4ff;
  --orange: #ffb77f;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.38);
  --font-heading: "Space Grotesk", "Be Vietnam Pro", Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Be Vietnam Pro", Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg-deep);
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 12% 8%, rgba(126, 40, 223, 0.34), transparent 34rem),
    radial-gradient(circle at 88% 12%, rgba(0, 219, 233, 0.23), transparent 32rem),
    linear-gradient(180deg, var(--bg) 0%, #0c0e17 48%, #090b12 100%);
  color: var(--text);
  font-family: var(--font-body);
  letter-spacing: 0;
  overflow-x: hidden;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.76), transparent 78%);
}

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

button {
  color: inherit;
  font: inherit;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--primary), var(--orange));
  box-shadow: 0 0 22px rgba(125, 244, 255, 0.6);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
  width: min(1180px, calc(100% - 32px));
  height: 86px;
  margin: 14px auto 0;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 28px;
  transition: height 220ms ease, background 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.site-header.is-scrolled {
  height: 66px;
  background: rgba(12, 14, 23, 0.78);
  border-color: rgba(216, 185, 255, 0.16);
  box-shadow: 0 18px 54px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(22px);
}

.brand-logo {
  display: block;
  width: 154px;
  height: auto;
  filter: drop-shadow(0 0 14px rgba(125, 244, 255, 0.2));
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: 8px;
}

.site-nav a {
  padding: 10px 13px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  transition: color 180ms ease, border-color 180ms ease, background 180ms ease;
}

.site-nav a:hover {
  color: var(--cyan);
  border-color: rgba(125, 244, 255, 0.26);
  background: rgba(125, 244, 255, 0.07);
}

.language-switch {
  display: flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid rgba(216, 185, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
}

.lang-btn {
  min-width: 54px;
  height: 34px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
}

.lang-btn.is-active {
  color: #2e0d4a;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  box-shadow: 0 0 22px rgba(216, 185, 255, 0.32);
}

.section-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 390px);
  gap: 28px;
  align-items: center;
  min-height: 100svh;
  padding: 142px 0 78px;
  overflow: clip;
}

.hero-glow {
  position: absolute;
  z-index: -1;
  border-radius: 999px;
  filter: blur(18px);
  opacity: 0.62;
}

.hero-glow-a {
  width: 420px;
  height: 420px;
  left: -160px;
  top: 18%;
  background: radial-gradient(circle, rgba(216, 185, 255, 0.23), transparent 68%);
}

.hero-glow-b {
  width: 380px;
  height: 380px;
  right: -120px;
  bottom: 8%;
  background: radial-gradient(circle, rgba(125, 244, 255, 0.2), transparent 70%);
}

.eyebrow,
.section-kicker {
  margin: 0 0 16px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.organizer-copy h2 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(46px, 7.5vw, 96px);
  line-height: 0.96;
  letter-spacing: 0;
}

.hero h1 {
  font-size: clamp(46px, 6.4vw, 82px);
  max-width: 820px;
  line-height: 1.12;
  white-space: pre-line;
}

.section-heading h2,
.organizer-copy h2 {
  line-height: 1.12;
}

.hero-lede,
.section-heading p,
.organizer-copy p:not(.section-kicker) {
  max-width: 650px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.7;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 34px;
}

.hero-tags span {
  padding: 10px 14px;
  border: 1px solid rgba(216, 185, 255, 0.24);
  border-radius: 999px;
  color: var(--primary);
  background: rgba(216, 185, 255, 0.08);
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 660px;
}

.phone-frame,
.device-panel,
.organizer-board,
.scenario-card,
.metrics {
  border: 1px solid rgba(216, 185, 255, 0.16);
  background: linear-gradient(150deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.035));
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(24px);
}

.phone-frame {
  position: relative;
  width: min(100%, 390px);
  min-height: 620px;
  padding: 22px;
  border-radius: 42px;
  overflow: hidden;
}

.phone-frame::before {
  position: absolute;
  inset: 0;
  content: "";
  background:
    radial-gradient(circle at 30% 0%, rgba(125, 244, 255, 0.18), transparent 34%),
    radial-gradient(circle at 80% 18%, rgba(216, 185, 255, 0.18), transparent 36%);
  pointer-events: none;
}

.phone-top {
  position: relative;
  display: flex;
  justify-content: center;
  padding: 8px 0 22px;
}

.phone-logo {
  width: 136px;
  height: auto;
}

.search-pill {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 16px;
  border: 1px solid rgba(216, 185, 255, 0.15);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(12, 14, 23, 0.62);
}

.search-icon {
  width: 12px;
  height: 12px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  box-shadow: 9px 9px 0 -7px var(--cyan);
}

.event-card {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 28px;
  background: rgba(17, 19, 28, 0.7);
}

.event-card-main {
  margin-top: 18px;
}

.event-cover {
  min-height: 180px;
  background: linear-gradient(135deg, rgba(125, 244, 255, 0.7), rgba(126, 40, 223, 0.72));
}

.cover-live {
  background:
    linear-gradient(160deg, rgba(8, 10, 18, 0.1), rgba(8, 10, 18, 0.82)),
    radial-gradient(circle at 25% 20%, #7df4ff, transparent 20%),
    radial-gradient(circle at 72% 28%, #d8b9ff, transparent 22%),
    linear-gradient(135deg, #1b2b7d, #781bd6 45%, #0ce4ef);
}

.cover-tech {
  background: linear-gradient(135deg, #1838bf, #7e28df 52%, #00dbe9);
}

.cover-walk {
  background: linear-gradient(135deg, #17253f, #00858f 48%, #ffb77f);
}

.event-body {
  padding: 18px;
}

.event-body p,
.compact p {
  margin: 0 0 7px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 700;
}

.event-body h2,
.compact h4,
.group-hero h4 {
  margin: 0;
  font-family: var(--font-heading);
}

.event-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
}

.avatar-stack {
  display: flex;
  margin-top: 18px;
}

.avatar-stack span {
  width: 34px;
  height: 34px;
  margin-left: -9px;
  border: 2px solid var(--bg);
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--primary));
}

.avatar-stack span:first-child {
  margin-left: 0;
}

.mini-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 14px;
}

.mini-card {
  padding: 16px;
  border: 1px solid rgba(216, 185, 255, 0.14);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.05);
}

.mini-card strong,
.metric-item strong {
  display: block;
  color: var(--cyan);
  font-family: var(--font-heading);
  font-size: 34px;
}

.mini-card span,
.metric-item span {
  color: var(--muted);
  font-size: 13px;
}

.mini-card.accent strong {
  color: var(--orange);
}

.orbit-card {
  position: absolute;
  padding: 12px 16px;
  border: 1px solid rgba(125, 244, 255, 0.22);
  border-radius: 999px;
  background: rgba(12, 14, 23, 0.76);
  box-shadow: 0 14px 42px rgba(0, 0, 0, 0.28);
}

.orbit-card-one {
  top: 18%;
  left: 0;
}

.orbit-card-two {
  right: 0;
  bottom: 24%;
  border-color: rgba(255, 183, 127, 0.24);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: -28px;
  border-radius: 28px;
  overflow: hidden;
}

.metric-item {
  padding: 30px;
  background: rgba(12, 14, 23, 0.32);
}

.experience,
.scenarios,
.organizers {
  padding: 118px 0 0;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.75fr);
  gap: 52px;
  align-items: end;
}

.section-heading h2,
.organizer-copy h2 {
  font-size: clamp(36px, 5vw, 66px);
  line-height: 1.12;
}

.organizer-copy h2 {
  font-size: clamp(36px, 4.25vw, 56px);
  line-height: 1.18;
}

.sticky-story {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 520px);
  gap: 72px;
  margin-top: 72px;
}

.story-copy {
  display: grid;
  gap: 28px;
}

.story-step {
  padding: 28px;
  border-left: 2px solid rgba(216, 185, 255, 0.18);
  color: var(--muted);
  transition: border-color 220ms ease, background 220ms ease, color 220ms ease;
}

.story-step.is-active {
  border-color: var(--cyan);
  border-radius: 0 24px 24px 0;
  color: var(--text);
  background: linear-gradient(90deg, rgba(125, 244, 255, 0.08), transparent);
}

.story-step span {
  color: var(--cyan);
  font-weight: 800;
}

.story-step h3 {
  margin: 12px 0 12px;
  color: var(--text);
  font-family: var(--font-heading);
  font-size: clamp(24px, 3vw, 36px);
}

.story-step p {
  margin: 0;
  line-height: 1.7;
}

.story-device {
  position: sticky;
  top: 116px;
  align-self: start;
  justify-self: end;
  width: 100%;
  max-width: 520px;
}

.device-panel {
  min-height: 560px;
  padding: 22px;
  border-radius: 34px;
}

.panel-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 22px;
}

.tab-pill {
  height: 42px;
  border: 1px solid rgba(216, 185, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.035);
  cursor: pointer;
}

.tab-pill.is-active {
  color: #11131c;
  background: linear-gradient(135deg, var(--cyan), var(--primary));
}

.screen-state {
  display: none;
  animation: screenIn 260ms ease;
}

.screen-state.is-active {
  display: block;
}

@keyframes screenIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.map-strip {
  position: relative;
  height: 148px;
  margin-bottom: 14px;
  border: 1px solid rgba(125, 244, 255, 0.16);
  border-radius: 24px;
  background:
    linear-gradient(90deg, transparent 49%, rgba(125, 244, 255, 0.14) 50%, transparent 51%),
    linear-gradient(0deg, transparent 49%, rgba(216, 185, 255, 0.14) 50%, transparent 51%),
    rgba(12, 14, 23, 0.58);
  background-size: 62px 62px;
}

.map-strip span {
  position: absolute;
  width: 16px;
  height: 16px;
  border: 3px solid var(--bg);
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 24px rgba(125, 244, 255, 0.7);
}

.map-strip span:nth-child(1) { left: 22%; top: 34%; }
.map-strip span:nth-child(2) { left: 58%; top: 22%; background: var(--primary); }
.map-strip span:nth-child(3) { left: 72%; top: 66%; background: var(--orange); }

.compact {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 14px;
  align-items: center;
  margin-top: 12px;
  padding: 12px;
}

.compact .event-cover {
  min-height: 82px;
  border-radius: 18px;
}

.compact span,
.group-hero p,
.topic-row span,
.organize-card span,
.board-row span,
.site-footer p {
  color: var(--muted);
}

.group-hero {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 16px;
  align-items: center;
  padding: 18px;
  border: 1px solid rgba(216, 185, 255, 0.16);
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.05);
}

.group-mark {
  display: grid;
  place-items: center;
  width: 76px;
  height: 76px;
  border-radius: 24px;
  color: #11131c;
  font: 800 32px/1 var(--font-heading);
  background: linear-gradient(135deg, var(--cyan), var(--primary));
}

.topic-row,
.organize-card,
.board-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 64px;
  margin-top: 12px;
  padding: 16px 18px;
  border: 1px solid rgba(216, 185, 255, 0.14);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.045);
}

.organize-card {
  display: block;
}

.progress-line {
  height: 8px;
  margin-top: 14px;
  border-radius: 999px;
  background: rgba(216, 185, 255, 0.1);
  overflow: hidden;
}

.progress-line i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--cyan), var(--primary));
}

.organize-card.hot {
  display: flex;
  border-color: rgba(255, 183, 127, 0.24);
}

.organize-card.hot strong {
  color: var(--orange);
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 30px;
}

.scenario-card {
  min-height: 260px;
  padding: 28px;
  border-radius: 28px;
}

.scenario-icon {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 16px;
  color: #11131c;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
}

.scenario-card h3 {
  margin: 42px 0 16px;
  font-family: var(--font-heading);
  font-size: 26px;
}

.scenario-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.organizers {
  display: grid;
  grid-template-columns: 1fr minmax(320px, 460px);
  gap: 54px;
  align-items: center;
  padding-bottom: 118px;
}

.organizer-board {
  padding: 18px;
  border-radius: 30px;
}

.board-row {
  margin-top: 0;
  margin-bottom: 12px;
}

.board-row:last-child {
  margin-bottom: 0;
}

.board-row strong {
  color: var(--cyan);
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(260px, auto) auto;
  gap: 28px;
  align-items: start;
  padding: 34px 0 46px;
  border-top: 1px solid rgba(216, 185, 255, 0.14);
}

.footer-logo {
  width: 144px;
  height: auto;
}

.site-footer p {
  margin: 12px 0 0;
}

.footer-company {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
  margin: 0;
  text-align: right;
  white-space: nowrap;
}

.footer-company strong {
  color: var(--text);
  font-size: 14px;
}

.footer-company a {
  color: var(--cyan);
}

.footer-links {
  display: grid;
  gap: 8px;
  justify-items: end;
}

.footer-links a {
  color: var(--muted);
  font-size: 13px;
  transition: color 180ms ease;
}

.footer-links a:hover {
  color: var(--cyan);
}

.page-main {
  min-height: 100svh;
  padding: 156px 0 90px;
}

.page-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(280px, 0.48fr);
  gap: 54px;
  align-items: start;
}

.page-hero h1 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(42px, 6vw, 78px);
  line-height: 1.08;
}

.page-hero p,
.legal-card p,
.legal-card li,
.detail-list dd {
  color: var(--muted);
  line-height: 1.72;
}

.legal-card {
  margin-top: 34px;
  padding: 28px;
  border: 1px solid rgba(216, 185, 255, 0.16);
  border-radius: 28px;
  background: linear-gradient(150deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.035));
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.legal-card h2 {
  margin: 0 0 14px;
  font-family: var(--font-heading);
  font-size: clamp(24px, 3vw, 34px);
}

.legal-card h3 {
  margin: 28px 0 10px;
  font-family: var(--font-heading);
  font-size: 20px;
}

.detail-list {
  display: grid;
  gap: 14px;
  margin: 0;
}

.detail-list div {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(216, 185, 255, 0.12);
}

.detail-list dt {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.detail-list dd {
  margin: 0;
}

.detail-list a,
.legal-card a {
  color: var(--cyan);
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 620ms ease, transform 620ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 920px) {
  .site-header {
    grid-template-columns: 1fr auto;
    height: auto;
    min-height: 72px;
    padding: 12px 14px;
  }

  .site-nav {
    display: none;
  }

  .brand-logo {
    width: 136px;
  }

  .hero,
  .section-heading,
  .sticky-story,
  .organizers,
  .page-hero {
    grid-template-columns: 1fr;
  }

  .hero {
    gap: 22px;
    padding-top: 146px;
  }

  .hero-visual {
    min-height: auto;
  }

  .story-device {
    position: relative;
    top: 0;
    max-width: 100%;
    justify-self: stretch;
  }

  .device-panel {
    min-height: auto;
  }

  .metrics,
  .scenario-grid {
    grid-template-columns: 1fr;
  }

  .metric-item,
  .scenario-card {
    min-height: auto;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }

  .footer-company,
  .footer-links {
    text-align: left;
    justify-items: start;
  }
}

@media (max-width: 620px) {
  .section-shell {
    width: min(100% - 24px, 1180px);
  }

  .site-header {
    width: calc(100% - 20px);
    margin-top: 10px;
    border-color: rgba(216, 185, 255, 0.14);
    background: rgba(12, 14, 23, 0.74);
    backdrop-filter: blur(22px);
  }

  .language-switch {
    transform: scale(0.92);
    transform-origin: right center;
  }

  .hero {
    padding-top: 160px;
  }

  .hero h1 {
    font-size: 44px;
  }

  .phone-frame {
    min-height: 560px;
    border-radius: 32px;
  }

  .event-cover {
    min-height: 150px;
  }

  .orbit-card {
    display: none;
  }

  .experience,
  .scenarios,
  .organizers {
    padding-top: 82px;
  }

  .device-panel {
    min-height: 500px;
    padding: 14px;
  }

  .compact {
    grid-template-columns: 72px 1fr;
  }

  .footer-company {
    white-space: normal;
  }

  .detail-list div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

}

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

  .reveal {
    opacity: 1;
    transform: none;
  }
}