:root {
  --bg: #07080c;
  --ink: #f5f2ec;
  --dim: #b7b1a6;
  --muted: #8a847a;
  --line: rgba(245, 242, 236, 0.12);
  --orange: #ff8a1a;
  --gold: #f0b429;
  --paper: #f4efe6;
  --ink-dark: #1a140f;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --display: "Outfit", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
}
a { color: inherit; }
img { display: block; max-width: 100%; }

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  background: #fff;
  color: #111;
  padding: 0.4rem 0.7rem;
  z-index: 20;
}
.skip:focus { top: 0.6rem; }

.progress {
  position: fixed;
  left: 0;
  top: 0;
  height: 3px;
  width: 0;
  z-index: 30;
  background: linear-gradient(90deg, var(--orange), var(--gold));
}
.grid, .orb { position: fixed; inset: 0; pointer-events: none; }
.grid {
  z-index: 0;
  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: radial-gradient(circle at 50% 20%, #000 0%, transparent 72%);
}
.orb { z-index: 0; filter: blur(40px); opacity: 0.55; }
.orb--a {
  background: radial-gradient(circle at 20% 10%, rgba(255, 138, 26, 0.45), transparent 36%);
  animation: drift 16s ease-in-out infinite alternate;
}
.orb--b {
  background: radial-gradient(circle at 80% 30%, rgba(240, 180, 41, 0.28), transparent 32%);
  animation: drift 22s ease-in-out infinite alternate-reverse;
}
@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(0, 24px, 0) scale(1.06); }
}

.top, main, .foot { position: relative; z-index: 1; }
.top {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.85rem 6vw;
  background: rgba(7, 8, 12, 0.72);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  font-weight: 700;
}
.brand img { border-radius: 10px; }
.editions {
  display: flex;
  gap: 0.35rem;
  margin-left: auto;
  padding: 0.2rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
}
.editions__item {
  text-decoration: none;
  font-size: 0.82rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  color: var(--dim);
}
.editions__item.is-current {
  color: #1a1208;
  background: linear-gradient(180deg, #ffe08a, var(--gold));
  font-weight: 700;
}
.top__down {
  text-decoration: none;
  font-size: 0.82rem;
  color: var(--dim);
}

.hero, .band, .split, .promise, .ai, .close {
  padding: 4.5rem 6vw;
}
.hero {
  min-height: calc(100vh - 4.2rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 8vh;
  padding-bottom: 8vh;
}
.eyebrow {
  margin: 0 0 0.8rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-family: var(--display);
  font-size: 0.78rem;
  color: var(--gold);
}
h1, h2, h3 { font-weight: 700; letter-spacing: -0.03em; }
h1 {
  margin: 0;
  font-size: clamp(2.6rem, 7vw, 6.4rem);
  line-height: 1.02;
}
h1 span { display: block; }
.hero__em {
  background: linear-gradient(100deg, #fff 0%, #ffd27a 35%, #ff8a1a 55%, #fff 80%);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: lineUp 1.05s cubic-bezier(0.16, 1, 0.3, 1) 0.12s both, sheen 7s 1.3s ease-in-out infinite;
}
.hero h1 span:first-child {
  animation: lineUp 1.05s cubic-bezier(0.16, 1, 0.3, 1) both;
}
.lede, .copy {
  max-width: 40rem;
  color: var(--dim);
  font-size: 1.05rem;
}
.hero__row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 0.4rem; }
.btn {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  border-radius: 999px;
  padding: 0.85rem 1.25rem;
  font-weight: 700;
}
.btn--solid { background: var(--ink); color: #111; }
.btn--ghost { border: 1px solid var(--line); }
.hero__note { color: var(--muted); font-size: 0.92rem; }

.band__head h2, .split h2, .promise h2, .ai h2, .close h2 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  line-height: 1.15;
}
.agenda {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}
@media (min-width: 60rem) {
  .agenda { grid-template-columns: repeat(3, 1fr); }
  .card--wide { grid-column: span 3; }
}
.card {
  position: relative;
  overflow: hidden;
  margin: 0;
  padding: 1.25rem 1.2rem 1.35rem;
  border: 1px solid var(--line);
  border-radius: 1.2rem;
  background: rgba(255, 255, 255, 0.03);
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.45s ease, background 0.45s ease, box-shadow 0.5s ease;
}
.card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 32%, rgba(255, 255, 255, 0.16), transparent 68%);
  transform: translateX(-130%);
  pointer-events: none;
}
.card:hover {
  transform: translateY(-8px);
  border-color: rgba(255, 138, 26, 0.5);
  background: rgba(255, 138, 26, 0.07);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
}
.card:hover::after {
  transform: translateX(130%);
  transition: transform 0.8s ease;
}
.card__no {
  font-family: var(--display);
  color: var(--orange);
  font-size: 0.85rem;
  letter-spacing: 0.14em;
}
.card h3 { margin: 0.45rem 0 0.35rem; font-size: 1.2rem; }
.card p { margin: 0; color: var(--dim); }

.split {
  display: grid;
  gap: 2rem;
  align-items: center;
}
@media (min-width: 60rem) {
  .split, .ai, .close { grid-template-columns: 1.15fr 0.85fr; }
}
.stack { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.7rem; }
.stack li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 1rem;
  border-radius: 0.9rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  opacity: 0;
  transform: translateX(28px);
}
.split.in .stack li {
  animation: slideIn 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.split.in .stack li:nth-child(2) { animation-delay: 0.08s; }
.split.in .stack li:nth-child(3) { animation-delay: 0.16s; }
.split.in .stack li:nth-child(4) { animation-delay: 0.24s; }
.stack span { color: var(--muted); }

.promise {
  position: relative;
  overflow: hidden;
  margin: 0 6vw 1rem;
  padding: 2.4rem 1.6rem;
  border-radius: 1.5rem;
  color: var(--ink-dark);
  background:
    radial-gradient(500px 180px at 100% 0%, rgba(255, 255, 255, 0.45), transparent 50%),
    linear-gradient(135deg, #ffe7bf, #ffb15a 55%, #ff8a1a);
}
.promise::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, transparent 20%, rgba(255, 255, 255, 0.45), transparent 80%);
  transform: translateX(-120%);
  pointer-events: none;
}
.promise.in::before {
  animation: sweep 1.4s 0.2s ease forwards;
}
.promise .eyebrow { color: #7a4a12; }
.promise p:last-child { margin-bottom: 0; max-width: 40rem; }

.ai__visual {
  min-height: 220px;
  border-radius: 1.4rem;
  border: 1px solid var(--line);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 1.2rem;
  background:
    linear-gradient(160deg, rgba(255, 138, 26, 0.18), transparent 50%),
    rgba(255, 255, 255, 0.03);
  font-family: var(--display);
  font-size: clamp(3rem, 8vw, 5.5rem);
  letter-spacing: -0.06em;
}
.ai__visual span:last-child { color: var(--gold); }
.ai.in .ai__visual span {
  animation: floaty 4.8s ease-in-out infinite;
}
.ai.in .ai__visual span:last-child { animation-delay: -1.6s; }

.close__qr {
  margin: 0;
  justify-self: center;
  text-align: center;
}
.close__qr img {
  width: min(260px, 72vw);
  border-radius: 1.1rem;
  background: #fff;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}
.close.in .close__qr img {
  animation: floaty 5.5s ease-in-out infinite;
}
.close__qr figcaption, .close__links, .close__ask { color: var(--dim); }
.close__ask { max-width: 36rem; }
.close__links { display: flex; flex-wrap: wrap; gap: 1rem; }
.close__links a { color: var(--gold); }

.foot {
  padding: 2rem 6vw 2.6rem;
  color: var(--muted);
  font-size: 0.85rem;
}
.foot a { color: var(--dim); }
.foot p { margin: 0.25rem 0; }

.spot {
  position: fixed;
  z-index: 0;
  width: 34rem;
  height: 34rem;
  left: var(--mx, 70%);
  top: var(--my, 18%);
  transform: translate(-50%, -50%);
  pointer-events: none;
  background: radial-gradient(circle, rgba(255, 138, 26, 0.2), transparent 68%);
  filter: blur(8px);
  transition: left 0.35s ease, top 0.35s ease;
}
.reveal {
  opacity: 0;
  transform: translateY(32px);
  filter: blur(8px);
}
.hero .reveal:not(h1) {
  animation: rise 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  filter: blur(0);
}
.hero h1.reveal {
  opacity: 1;
  transform: none;
  filter: none;
}
.hero .reveal:nth-child(1) { animation-delay: 0.05s; }
.hero .reveal:nth-child(3) { animation-delay: 0.28s; }
.hero .reveal:nth-child(4) { animation-delay: 0.4s; }
.hero .reveal:nth-child(5) { animation-delay: 0.52s; }
.reveal.in {
  animation: rise 0.95s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.agenda .reveal.in:nth-child(2) { animation-delay: 0.06s; }
.agenda .reveal.in:nth-child(3) { animation-delay: 0.12s; }
.agenda .reveal.in:nth-child(4) { animation-delay: 0.18s; }
.agenda .reveal.in:nth-child(5) { animation-delay: 0.24s; }
.agenda .reveal.in:nth-child(6) { animation-delay: 0.3s; }
.agenda .reveal.in:nth-child(7) { animation-delay: 0.36s; }

@keyframes rise {
  to { opacity: 1; transform: none; filter: blur(0); }
}
@keyframes lineUp {
  from { opacity: 0; transform: translateY(40%); filter: blur(10px); }
  to { opacity: 1; transform: none; filter: blur(0); }
}
@keyframes sheen {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}
@keyframes slideIn {
  to { opacity: 1; transform: none; }
}
@keyframes sweep {
  to { transform: translateX(120%); }
}
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@media (max-width: 720px) {
  .top { flex-wrap: wrap; padding: 0.75rem 1.1rem; }
  .editions { order: 3; margin-left: 0; }
  .hero, .band, .split, .ai, .close { padding: 3.2rem 1.15rem; }
  .promise { margin: 0 1.15rem; }
  .top__down { margin-left: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .orb, .reveal, .hero h1 span, .hero__em, .spot { animation: none; }
  .reveal, .stack li { opacity: 1; transform: none; filter: none; }
  .card:hover, .card:hover::after { transform: none; }
  .promise::before, .close.in .close__qr img, .ai.in .ai__visual span { animation: none; }
}