:root {
  --bg: #0d2340;
  --bg-deep: #09192d;
  --panel: rgba(18, 43, 73, 0.58);
  --panel-strong: rgba(16, 35, 60, 0.78);
  --panel-soft: rgba(255, 255, 255, 0.08);
  --border: rgba(168, 232, 255, 0.24);
  --text: #f5fbff;
  --muted: #c2d8ea;
  --cyan: #7ef1ff;
  --blue: #6da8ff;
  --mint: #bcffe0;
  --amber: #ffc76f;
  --rose: #ff95ab;
  --shadow: 0 28px 72px rgba(5, 18, 38, 0.2);
  --radius-lg: 30px;
  --radius-md: 22px;
  --radius-sm: 16px;
  --max-width: 1220px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Outfit", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at 16% 18%, rgba(109, 168, 255, 0.42), transparent 30%),
    radial-gradient(circle at 84% 10%, rgba(126, 241, 255, 0.28), transparent 26%),
    radial-gradient(circle at 82% 68%, rgba(255, 189, 104, 0.2), transparent 25%),
    linear-gradient(180deg, #12335a 0%, #0d2340 42%, #153861 100%);
}

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

ul {
  margin: 0;
  padding-left: 1.15rem;
}

.page-shell {
  position: relative;
  overflow: hidden;
}

.bg-orb,
.bg-grid,
.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.bg-orb {
  filter: blur(90px);
  opacity: 0.66;
}

.bg-orb-1 {
  inset: 6% auto auto -12%;
  width: 30rem;
  height: 30rem;
  background: rgba(107, 170, 255, 0.34);
}

.bg-orb-2 {
  inset: auto -10% 12% auto;
  width: 34rem;
  height: 34rem;
  background: rgba(255, 190, 106, 0.22);
}

.bg-orb-3 {
  inset: 32% 24% auto auto;
  width: 18rem;
  height: 18rem;
  background: rgba(156, 255, 226, 0.18);
}

.bg-grid {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95), transparent 90%);
  opacity: 0.22;
}

.grain {
  opacity: 0.06;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.9) 0.7px, transparent 0.8px),
    radial-gradient(circle at 80% 60%, rgba(255, 255, 255, 0.8) 0.7px, transparent 0.8px);
  background-size: 18px 18px, 22px 22px;
  mix-blend-mode: soft-light;
}

.site-header,
.section,
.site-footer {
  position: relative;
  z-index: 1;
}

.site-header {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 22px auto 0;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(15, 37, 66, 0.5);
  backdrop-filter: blur(18px);
  box-shadow: 0 12px 36px rgba(8, 27, 49, 0.16);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: "Noto Serif SC", serif;
  font-size: 1.08rem;
  letter-spacing: 0.08em;
}

.brand-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--amber));
  box-shadow: 0 0 18px rgba(118, 236, 255, 0.75);
}

.nav {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-size: 0.94rem;
}

.nav a {
  padding: 8px 12px;
  border-radius: 999px;
  transition: background-color 180ms ease, color 180ms ease;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--text);
  background: rgba(255, 255, 255, 0.1);
}

.section {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 0 auto;
  padding: 96px 0;
}

.hero {
  min-height: calc(100vh - 132px);
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 42px;
  align-items: center;
}

.eyebrow,
.mini-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.hero h1,
.section-heading h2,
.join-copy h2 {
  margin: 16px 0 0;
  font-family: "Noto Serif SC", serif;
  line-height: 1.02;
}

.hero h1 {
  display: flex;
  flex-direction: column;
  max-width: 9.8ch;
}

.title-nowrap {
  white-space: nowrap;
}

.nowrap {
  white-space: nowrap;
}

.title-brand {
  display: block;
  margin-bottom: 20px;
  font-size: clamp(2.2rem, 4.4vw, 3.8rem);
  letter-spacing: 0.04em;
}

.title-main {
  display: block;
  font-size: clamp(3rem, 6vw, 5.6rem);
}

.title-main + .title-main {
  margin-top: 4px;
}

.hero-lead {
  margin: 24px 0 0;
  font-size: clamp(1.18rem, 2vw, 1.5rem);
  font-weight: 700;
  color: var(--mint);
}

.hero-text,
.section-text,
.manifesto-card p,
.track-card p,
.track-card li,
.idea-feature span,
.creator-list li,
.sprint-card p,
.requirement-card p,
.awards-side p,
.join-copy p,
.join-line span {
  color: var(--muted);
  line-height: 1.78;
}

.hero-text {
  max-width: 39rem;
  margin: 16px 0 0;
  font-size: 1.04rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button.primary {
  color: #04111e;
  background: linear-gradient(135deg, var(--cyan), #92b8ff 60%, var(--amber));
  box-shadow: 0 20px 50px rgba(118, 236, 255, 0.25);
}

.button.ghost {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.08);
}

.button.block {
  width: 100%;
  margin-top: 18px;
}

.hero-ribbons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.hero-ribbons span,
.pill,
.tag-cloud span {
  padding: 10px 14px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
}

.card,
.track-card,
.sprint-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.glass {
  backdrop-filter: blur(16px);
}

.hero-stage {
  position: relative;
  padding: 22px;
  background:
    linear-gradient(150deg, rgba(255, 255, 255, 0.12), transparent 24%),
    linear-gradient(180deg, rgba(126, 241, 255, 0.14), transparent 30%),
    var(--panel-strong);
}

.stage-screen {
  position: relative;
  overflow: hidden;
  min-height: 560px;
  padding: 28px;
  border-radius: calc(var(--radius-lg) - 6px);
  background:
    linear-gradient(135deg, rgba(126, 241, 255, 0.11), transparent 38%),
    linear-gradient(220deg, rgba(255, 199, 111, 0.1), transparent 42%),
    rgba(23, 55, 90, 0.52);
}

.stage-poster {
  position: absolute;
  right: -2px;
  bottom: 0;
  width: 86%;
  height: auto;
  max-height: 88%;
  object-fit: contain;
  object-position: right bottom;
  opacity: 0.68;
  mix-blend-mode: normal;
  filter: saturate(1.11) brightness(1.12) contrast(1.03);
  pointer-events: none;
}

.stage-screen::before,
.stage-screen::after {
  content: "";
  position: absolute;
  inset: 0;
}

.stage-screen::before {
  background:
    linear-gradient(90deg, rgba(18, 43, 73, 0.38) 0%, rgba(18, 43, 73, 0.12) 38%, rgba(18, 43, 73, 0) 100%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent 38%);
  z-index: 0;
}

.stage-screen::after {
  left: auto;
  right: -40px;
  top: 40px;
  inset: auto;
  border-radius: 50%;
  filter: blur(20px);
  width: 180px;
  height: 180px;
  background: rgba(118, 236, 255, 0.18);
}

.stage-screen .stage-accent {
  display: none;
}

.stage-screen > * {
  position: relative;
  z-index: 1;
}

.stage-screen::selection {
  background: rgba(126, 241, 255, 0.24);
}

.hero-stage::after {
  content: "";
  position: absolute;
  left: 18px;
  bottom: 24px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  filter: blur(20px);
  background: rgba(255, 146, 100, 0.12);
  pointer-events: none;
}

.stage-badge {
  position: relative;
  z-index: 1;
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.1);
  color: var(--cyan);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
}

.stage-title {
  position: relative;
  z-index: 1;
  margin-top: 26px;
}

.stage-title span {
  display: block;
  color: var(--muted);
}

.stage-title strong {
  display: block;
  margin-top: 10px;
  font-size: clamp(1.9rem, 3vw, 3rem);
  line-height: 1.12;
}

.signal-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 28px;
}

.signal-card {
  min-height: 136px;
  padding: 20px;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.12), transparent 50%),
    rgba(255, 255, 255, 0.06);
}

.signal-card span,
.stage-meta span {
  color: var(--muted);
}

.signal-card strong {
  display: block;
  margin-top: 32px;
  font-size: 1.3rem;
}

.signal-card-a {
  transform: translateY(10px);
}

.signal-card-b {
  transform: rotate(-2deg);
}

.signal-card-c {
  transform: rotate(2deg);
}

.signal-card-d {
  transform: translateY(-8px);
}

.stage-meta {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.stage-meta div {
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.08);
}

.stage-meta b {
  display: block;
  font-size: 1.35rem;
  color: var(--text);
}

.manifesto-grid,
.ideas-layout,
.join-section {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 28px;
  align-items: start;
}

.section-heading {
  max-width: 42rem;
}

.section-heading h2,
.join-copy h2 {
  font-size: clamp(2.1rem, 4vw, 3.7rem);
}

.section-text,
.section-side-note {
  margin-top: 18px;
  color: var(--muted);
  line-height: 1.8;
}

.split-heading {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  max-width: none;
}

.section-side-note {
  max-width: 20rem;
}

.manifesto-stack {
  position: relative;
  padding-top: 22px;
}

.manifesto-card {
  padding: 28px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.1), transparent 36%),
    var(--panel-strong);
}

.manifesto-card h3,
.track-card h3,
.sprint-card h3,
.requirement-card h3 {
  margin: 10px 0 12px;
  font-size: 1.35rem;
  line-height: 1.3;
}

.manifesto-card.tilt {
  transform: rotate(-2deg);
}

.manifesto-card.offset {
  position: relative;
  margin-top: -18px;
  margin-left: 70px;
}

.tracks-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 22px;
  margin-top: 34px;
}

.track-card {
  position: relative;
  overflow: hidden;
  padding: 28px;
  min-height: 320px;
}

.track-art {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 22px;
  margin-bottom: 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.08);
}

.track-card.large {
  min-height: 380px;
}

.track-card::after {
  content: "";
  position: absolute;
  right: -52px;
  bottom: -58px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  filter: blur(14px);
  opacity: 0.22;
}

.track-cyan::after {
  background: var(--cyan);
}

.track-blue::after {
  background: var(--blue);
}

.track-amber::after {
  background: var(--amber);
}

.track-rose::after {
  background: var(--rose);
}

.track-top {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  align-items: start;
  margin-bottom: 16px;
}

.track-no {
  display: inline-grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  font-weight: 800;
}

.idea-feature,
.collage-card,
.tag-wall,
.creator-card,
.requirement-card,
.awards-main,
.awards-side,
.join-card {
  padding: 28px;
}

.ideas-layout {
  margin-top: 34px;
}

.idea-feature {
  background:
    linear-gradient(180deg, rgba(126, 241, 255, 0.12), transparent 26%),
    var(--panel-strong);
}

.idea-lines {
  display: grid;
  gap: 22px;
  margin-top: 14px;
}

.idea-lines strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.15rem;
}

.ideas-side {
  display: grid;
  gap: 20px;
}

.mini-collage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 16px;
}

.mini-collage img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.08);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.creator-list {
  display: grid;
  gap: 12px;
  margin-top: 14px;
  padding-left: 1rem;
}

.sprint-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}

.sprint-card {
  padding: 24px;
  min-height: 200px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.1), transparent 30%),
    rgba(18, 43, 73, 0.68);
}

.sprint-card.wide {
  grid-column: span 2;
}

.sprint-card.active {
  transform: translateY(-10px);
}

.sprint-card.highlight {
  background:
    linear-gradient(180deg, rgba(255, 199, 111, 0.18), transparent 34%),
    rgba(40, 52, 66, 0.74);
}

.sprint-date {
  display: inline-block;
  color: var(--cyan);
  font-weight: 800;
  letter-spacing: 0.08em;
}

.requirements-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 34px;
}

.requirement-card {
  min-height: 100%;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.1), transparent 26%),
    rgba(16, 35, 60, 0.76);
}

.requirement-card span {
  display: inline-flex;
  margin-bottom: 16px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--cyan);
  font-size: 0.8rem;
  letter-spacing: 0.18em;
}

.awards-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr 0.9fr;
  gap: 20px;
  margin-top: 34px;
}

.awards-main {
  background:
    radial-gradient(circle at top right, rgba(126, 241, 255, 0.22), transparent 32%),
    var(--panel-strong);
}

.award-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.award-row:last-child {
  border-bottom: 0;
}

.award-row strong {
  display: block;
  font-size: 1.12rem;
}

.award-row span {
  color: var(--muted);
}

.award-row b,
.award-highlight {
  font-size: 1.55rem;
  color: var(--amber);
}

.join-card {
  background:
    linear-gradient(180deg, rgba(255, 199, 111, 0.14), transparent 30%),
    var(--panel-strong);
}

.join-line {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.join-line:last-of-type {
  border-bottom: 0;
}

.welcome-section {
  padding-top: 12px;
}

.welcome-card {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  padding: 30px;
  background:
    radial-gradient(circle at top right, rgba(126, 241, 255, 0.18), transparent 28%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 34%),
    var(--panel-strong);
}

.welcome-copy h2 {
  margin: 14px 0 0;
  font-family: "Noto Serif SC", serif;
  font-size: clamp(2rem, 3.8vw, 3.2rem);
  line-height: 1.18;
}

.welcome-copy p:last-child,
.qr-item p {
  color: var(--muted);
  line-height: 1.8;
}

.qr-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.qr-item {
  display: grid;
  gap: 14px;
  align-content: start;
  justify-items: center;
}

.qr-placeholder {
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 24px;
  border: 1px dashed rgba(255, 255, 255, 0.34);
  background:
    linear-gradient(135deg, rgba(126, 241, 255, 0.12), rgba(255, 199, 111, 0.1)),
    rgba(255, 255, 255, 0.05);
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
}

.qr-placeholder::before,
.qr-placeholder::after {
  content: "";
  position: absolute;
  inset: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
}

.qr-placeholder::after {
  inset: auto 20px 20px auto;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
}

.qr-placeholder span {
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.08em;
}

.qr-item p {
  margin: 0;
  width: min(100%, 220px);
  text-align: center;
  color: var(--muted);
  line-height: 1.7;
  font-size: 0.96rem;
}

.org-section {
  padding-top: 12px;
}

.org-card {
  padding: 30px;
  background:
    radial-gradient(circle at top right, rgba(255, 199, 111, 0.14), transparent 26%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent 34%),
    var(--panel-strong);
}

.org-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.org-item {
  padding: 20px 22px;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
}

.org-label {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--cyan);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  white-space: nowrap;
}

.org-item p {
  margin: 0;
  color: var(--text);
  line-height: 1.8;
}

.site-footer {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 0 auto;
  padding: 0 0 44px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  color: var(--muted);
  font-size: 0.94rem;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 700ms ease, transform 700ms ease;
}

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

@media (max-width: 1100px) {
  .hero,
  .manifesto-grid,
  .ideas-layout,
  .join-section,
  .welcome-card,
  .awards-layout {
    grid-template-columns: 1fr;
  }

  .tracks-grid,
  .sprint-grid {
    grid-template-columns: 1fr 1fr;
  }

  .signal-card-a,
  .signal-card-b,
  .signal-card-c,
  .signal-card-d,
  .manifesto-card.tilt,
  .manifesto-card.offset,
  .sprint-card.active {
    transform: none;
    margin-left: 0;
  }

  .sprint-card.wide {
    grid-column: span 1;
  }
}

@media (max-width: 760px) {
  .site-header {
    margin-top: 14px;
    padding: 14px 16px;
    border-radius: 24px;
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .nav {
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.88rem;
  }

  .section {
    padding: 76px 0;
  }

  .hero {
    min-height: auto;
    gap: 28px;
  }

  .hero h1,
  .section-heading h2,
  .join-copy h2 {
    max-width: none;
  }

  .title-brand {
    margin-bottom: 14px;
  }

  .split-heading {
    display: block;
  }

  .section-side-note {
    max-width: none;
  }

  .signal-grid,
  .stage-meta,
  .tracks-grid,
  .sprint-grid,
  .requirements-grid,
  .org-grid,
  .qr-grid {
    grid-template-columns: 1fr;
  }

  .mini-collage {
    grid-template-columns: 1fr;
  }

  .stage-poster {
    right: -12px;
    bottom: 0;
    width: 88%;
    max-height: 56%;
    opacity: 0.14;
  }

  .site-footer {
    flex-direction: column;
  }
}