:root {
  color-scheme: dark;
  --bg: #090b10;
  --surface: #11141c;
  --surface-2: #171b25;
  --ink: #f4f1e8;
  --muted: #999da8;
  --line: rgba(255,255,255,.14);
  --lime: #c9ff37;
  --coral: #ff6b55;
  --blue: #6488ff;
  --radius: 18px;
}

* { box-sizing: border-box; }
html { overflow-x: hidden; scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--bg);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.55;
}
button, input, select, textarea { font: inherit; }
[hidden] { display: none !important; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
a { color: inherit; text-decoration: none; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
  padding: 10px clamp(16px, 5vw, 72px);
  background: rgba(9,11,16,.86);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--bg);
  background: var(--lime);
  border-radius: 50%;
  font-weight: 950;
  transform: rotate(-8deg);
}
.brand-copy b, .brand-copy small { display: block; }
.brand-copy b { font-size: 18px; line-height: 1.1; }
.brand-copy small { color: var(--muted); font-size: 10px; }
.topbar nav { display: flex; gap: 28px; color: var(--muted); font-size: 13px; }
.topbar nav a:hover { color: var(--lime); }
.mini-cta, .generate-btn {
  border: 0;
  background: var(--lime);
  color: var(--bg);
  font-weight: 900;
  cursor: pointer;
}
.mini-cta { padding: 10px 15px; border-radius: 999px; font-size: 12px; }

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, .72fr);
  gap: 50px;
  align-items: center;
  min-height: 710px;
  max-width: 1440px;
  margin: auto;
  padding: 76px clamp(18px, 6vw, 100px) 84px;
  overflow: hidden;
}
.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background:
    radial-gradient(circle at 20% 16%, rgba(100,136,255,.22), transparent 28%),
    radial-gradient(circle at 86% 58%, rgba(255,107,85,.18), transparent 25%);
  pointer-events: none;
}
.hero-noise {
  position: absolute;
  inset: 0;
  opacity: .14;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.45'/%3E%3C/svg%3E");
  pointer-events: none;
}
.hero-copy, .quick-create { position: relative; z-index: 2; }
h1, h2, p { margin-top: 0; }
h1 {
  margin-bottom: 22px;
  font-size: clamp(58px, 8vw, 128px);
  line-height: .94;
  letter-spacing: -.075em;
}
h1 em { color: var(--lime); font-style: normal; }
.hero-copy p { max-width: 610px; color: #c4c6cc; font-size: clamp(16px, 1.6vw, 21px); }
.vinyl {
  position: absolute;
  top: 90px;
  right: 2%;
  display: grid;
  width: min(35vw, 470px);
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 50%;
  background: repeating-radial-gradient(circle, #151923 0 5px, #080a0e 6px 8px);
  box-shadow: 0 0 80px rgba(100,136,255,.18);
  animation: spin 18s linear infinite;
}
.vinyl::after {
  width: 26%;
  aspect-ratio: 1;
  content: "";
  background: var(--coral);
  border: 10px solid #11141c;
  border-radius: 50%;
}
.vinyl span { position: absolute; z-index: 1; color: var(--bg); font-weight: 950; }
@keyframes spin { to { transform: rotate(360deg); } }
.waveform { display: flex; align-items: center; gap: 6px; height: 46px; margin-top: 28px; }
.waveform i { width: 4px; height: 22%; background: var(--coral); border-radius: 3px; animation: wave .8s ease-in-out infinite alternate; }
.waveform i:nth-child(3n) { height: 80%; animation-delay: -.3s; }
.waveform i:nth-child(2n) { height: 48%; animation-delay: -.6s; }
@keyframes wave { to { height: 95%; } }

.quick-create {
  align-self: end;
  margin-top: 260px;
  padding: 22px;
  background: rgba(17,20,28,.88);
  border: 1px solid var(--line);
  border-radius: 26px;
  box-shadow: 0 28px 90px rgba(0,0,0,.42);
  backdrop-filter: blur(14px);
}
.quick-create label { display: block; margin-bottom: 12px; color: var(--muted); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.quick-row textarea {
  width: 100%;
  min-height: 100px;
  padding: 0;
  color: var(--ink);
  background: transparent;
  border: 0;
  outline: 0;
  resize: none;
  font-size: 18px;
}
.quick-row button {
  display: flex;
  justify-content: space-between;
  width: 100%;
  padding: 14px 16px;
  border: 0;
  border-radius: 13px;
  color: var(--bg);
  background: var(--lime);
  font-weight: 900;
  cursor: pointer;
}
.quick-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 12px; }
.quick-tags button {
  padding: 6px 9px;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 11px;
  cursor: pointer;
}

.tools-section, .studio-section, .poster-section {
  max-width: 1260px;
  margin: auto;
  padding: 92px clamp(18px, 5vw, 72px);
}
.section-title { display: grid; grid-template-columns: .6fr 1.4fr; gap: 30px; margin-bottom: 34px; }
.section-title span, .studio-head > span, .poster-copy > span { color: var(--lime); font-size: 12px; font-weight: 900; letter-spacing: .12em; }
.section-title h2, .studio-head h2, .poster-copy h2 {
  margin: 0;
  font-size: clamp(38px, 5vw, 72px);
  line-height: 1.02;
  letter-spacing: -.06em;
}
.tool-list { border-top: 1px solid var(--line); }
.tool-card {
  display: grid;
  grid-template-columns: 46px 56px 1fr 30px;
  gap: 16px;
  align-items: center;
  width: 100%;
  padding: 22px 4px;
  text-align: left;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  transition: padding .2s, background .2s;
}
.tool-card:hover, .tool-card.active { padding-left: 16px; padding-right: 16px; background: var(--surface); }
.tool-card.active .tool-icon { color: var(--bg); background: var(--lime); }
.tool-index { color: var(--muted); font-size: 11px; }
.tool-icon { display: grid; width: 48px; height: 48px; place-items: center; border: 1px solid var(--line); border-radius: 50%; font-size: 22px; }
.tool-card b, .tool-card small { display: block; }
.tool-card b { font-size: clamp(18px, 2vw, 27px); }
.tool-card small { margin-top: 4px; color: var(--muted); }
.arrow { color: var(--lime); font-size: 24px; }

.studio-section {
  position: relative;
  max-width: none;
  background:
    linear-gradient(115deg, transparent 0 66%, rgba(100,136,255,.12) 66.2% 67%, transparent 67.2%),
    linear-gradient(72deg, transparent 0 76%, rgba(255,107,85,.13) 76.2% 77%, transparent 77.2%),
    #eff0e8;
  color: #0a0c11;
}
.studio-head { display: grid; grid-template-columns: .6fr 1.4fr; gap: 30px; max-width: 1116px; margin: 0 auto 32px; }
.studio-head > span { color: #586223; }
.studio-head p { color: #5e625e; }
.studio-shell { display: grid; grid-template-columns: .85fr 1.15fr; max-width: 1116px; margin: auto; border: 1px solid #c9cbc2; border-radius: 24px; overflow: hidden; box-shadow: 0 30px 90px rgba(28,31,25,.13); }
.studio-form, .event-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 24px; background: #f8f8f3; border-right: 1px solid #c9cbc2; }
.studio-form label, .event-form label { display: grid; gap: 7px; color: #656861; font-size: 12px; font-weight: 800; }
.studio-form input, .studio-form select, .studio-form textarea,
.event-form input, .event-form select {
  width: 100%;
  min-height: 46px;
  padding: 11px 12px;
  color: #0a0c11;
  background: #fff;
  border: 1px solid #d3d5cc;
  border-radius: 10px;
  outline-color: #7c9b18;
}
.studio-form textarea { resize: vertical; }
.event-form {
  position: relative;
  align-content: start;
  color: var(--ink);
  background:
    radial-gradient(circle at 100% 0, rgba(201,255,55,.13), transparent 32%),
    linear-gradient(160deg, #11141c, #080a0e 72%);
  border-right-color: rgba(255,255,255,.12);
  overflow: hidden;
}
.event-form::before {
  position: absolute;
  top: -38px;
  right: 24px;
  width: 120px;
  height: 220px;
  content: "";
  background: linear-gradient(rgba(100,136,255,.32), transparent);
  clip-path: polygon(44% 0, 58% 0, 100% 100%, 0 100%);
  opacity: .55;
  pointer-events: none;
}
.event-form label { position: relative; z-index: 1; color: #b7bbc5; }
.event-form input, .event-form select {
  color: var(--ink);
  background: rgba(255,255,255,.06);
  border-color: rgba(255,255,255,.14);
  outline-color: var(--lime);
}
.event-form select option { color: #11141c; }
.event-form-intro { position: relative; z-index: 1; padding: 2px 0 10px; border-bottom: 1px solid rgba(255,255,255,.12); }
.event-form-intro span { color: var(--lime); font-size: 10px; font-weight: 900; letter-spacing: .16em; }
.event-form-intro p { margin: 5px 0 0; color: var(--ink); font-size: 20px; font-weight: 900; letter-spacing: -.04em; }
.event-generate { position: relative; z-index: 1; background: var(--coral); }
.wide { grid-column: 1 / -1; }
.generate-btn { display: flex; justify-content: space-between; padding: 14px 16px; border-radius: 11px; }
.generate-btn b { font-size: 10px; letter-spacing: .08em; }
.result-panel { min-height: 390px; padding: 24px; background: #11141c; color: var(--ink); }
.result-top { display: flex; justify-content: space-between; padding-bottom: 14px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 11px; letter-spacing: .08em; }
.result-top button { color: var(--lime); background: transparent; border: 0; cursor: pointer; }
#resultContent { padding-top: 22px; }
.empty { color: #777d89; font-size: 20px; }
.result-block { margin-bottom: 20px; }
.result-block small { display: block; color: var(--lime); font-size: 10px; letter-spacing: .12em; }
.result-block h3 { margin: 5px 0; font-size: 24px; }
.result-block p { color: #c6c9d0; white-space: pre-line; }
.event-result-mode {
  background:
    radial-gradient(circle at 80% 4%, rgba(255,107,85,.18), transparent 25%),
    radial-gradient(circle at 10% 96%, rgba(100,136,255,.2), transparent 30%),
    #11141c;
}
.campaign-summary { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 16px; }
.campaign-summary span { padding: 5px 8px; color: var(--lime); border: 1px solid rgba(201,255,55,.3); border-radius: 999px; font-size: 9px; font-weight: 900; letter-spacing: .08em; }
.campaign-summary b { flex-basis: 100%; margin-top: 5px; font-size: 30px; line-height: 1; letter-spacing: -.05em; }
.campaign-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.campaign-grid .result-block { min-width: 0; margin: 0; padding: 14px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,255,255,.035); }
.campaign-grid .result-block:nth-child(2), .campaign-grid .result-block:nth-child(5) { border-color: rgba(255,107,85,.35); }
.campaign-grid .result-block:nth-child(4) { background: var(--lime); }
.campaign-grid .result-block:nth-child(4) small, .campaign-grid .result-block:nth-child(4) h3, .campaign-grid .result-block:nth-child(4) p { color: var(--bg); }
.campaign-grid .result-block h3 { font-size: 19px; }
.campaign-grid .result-block p { margin: 6px 0 0; font-size: 12px; }

.prompt-section { padding: 92px max(18px, calc((100vw - 1116px) / 2)); background: var(--coral); color: #0a0c11; overflow: hidden; }
.section-title.light span { color: #502018; }
.prompt-rail { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(230px, 1fr); gap: 12px; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 8px; }
.prompt-rail button {
  min-height: 270px;
  padding: 18px;
  color: #0a0c11;
  text-align: left;
  background: rgba(255,255,255,.18);
  border: 1px solid rgba(10,12,17,.3);
  border-radius: 18px;
  scroll-snap-align: start;
  cursor: pointer;
}
.prompt-rail button:nth-child(2) { background: var(--lime); }
.prompt-rail button:nth-child(3) { background: #11141c; color: var(--ink); }
.prompt-rail small, .prompt-rail b, .prompt-rail span { display: block; }
.prompt-rail small { font-size: 10px; letter-spacing: .12em; }
.prompt-rail b { margin: 54px 0 25px; font-size: 30px; line-height: 1; letter-spacing: -.05em; }
.prompt-rail span { opacity: .7; font-size: 12px; }

.poster-section { display: grid; grid-template-columns: .8fr 1.2fr; gap: 60px; align-items: center; }
.poster-copy p { max-width: 470px; margin-top: 20px; color: var(--muted); }
.text-link { padding: 0; color: var(--lime); background: transparent; border: 0; font-weight: 900; cursor: pointer; }
.poster-stack { position: relative; min-height: 530px; }
.poster {
  position: absolute;
  display: grid;
  width: min(300px, 62vw);
  aspect-ratio: 2 / 3;
  align-content: space-between;
  padding: 20px;
  text-align: left;
  border: 0;
  border-radius: 5px;
  box-shadow: 0 24px 65px rgba(0,0,0,.45);
  cursor: pointer;
  transition: transform .25s;
}
.poster:hover { z-index: 4; transform: translateY(-14px) rotate(0); }
.poster span, .poster small { font-size: 10px; letter-spacing: .15em; }
.poster b { font-size: 52px; line-height: .84; letter-spacing: -.09em; }
.poster-a { z-index: 3; left: 8%; color: var(--bg); background: var(--lime); transform: rotate(-7deg); }
.poster-a::after { content: ""; position: absolute; inset: 22% 10%; border: 16px solid #0a0c11; border-radius: 50%; }
.poster-a b, .poster-a span, .poster-a small { z-index: 1; }
.poster-b { z-index: 2; left: 32%; top: 35px; color: var(--ink); background: var(--coral); transform: rotate(5deg); }
.poster-c { left: 53%; top: 70px; color: var(--ink); background: var(--blue); transform: rotate(11deg); }

footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 30px;
  align-items: center;
  padding: 32px clamp(18px, 5vw, 72px);
  border-top: 1px solid var(--line);
}
footer > div { display: flex; gap: 20px; color: var(--muted); font-size: 12px; }
footer p { margin: 0; color: var(--muted); text-align: right; font-size: 11px; }

@media (max-width: 900px) {
  .topbar nav { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 60px; }
  .vinyl { top: 40px; right: -25%; width: 65vw; opacity: .45; }
  .quick-create { margin-top: 40px; }
  .section-title, .studio-head, .poster-section { grid-template-columns: 1fr; }
  .studio-shell { grid-template-columns: 1fr; }
  .studio-form, .event-form { border-right: 0; border-bottom: 1px solid #c9cbc2; }
  .poster-stack { min-height: 500px; }
  footer { grid-template-columns: 1fr; }
  footer p { text-align: left; }
}

@media (max-width: 600px) {
  .topbar { min-height: 62px; padding: 8px 14px; }
  .brand-copy small { display: none; }
  .mini-cta { padding: 8px 11px; }
  .hero { padding: 50px 16px 64px; }
  h1 { font-size: 62px; }
  .hero-copy p { max-width: 85%; font-size: 15px; }
  .vinyl { top: 75px; right: -37%; width: 84vw; }
  .quick-create { padding: 16px; border-radius: 20px; }
  .tools-section, .studio-section, .poster-section { padding: 68px 16px; }
  .section-title h2, .studio-head h2, .poster-copy h2 { font-size: 42px; }
  .tool-card { grid-template-columns: 30px 48px 1fr 20px; gap: 10px; padding: 18px 0; }
  .tool-card small { font-size: 11px; }
  .tool-icon { width: 42px; height: 42px; }
  .studio-form, .event-form { grid-template-columns: 1fr; padding: 16px; }
  .wide { grid-column: auto; }
  .result-panel { min-height: 330px; padding: 18px; }
  .campaign-grid { grid-template-columns: 1fr; }
  .campaign-summary b { font-size: 25px; }
  .prompt-section { padding: 68px 16px; }
  .prompt-rail { grid-auto-columns: 76vw; }
  .poster-stack { min-height: 390px; margin-left: -8px; }
  .poster { width: 198px; }
  .poster b { font-size: 40px; }
  .poster-a { left: 0; }
  .poster-b { left: 18%; }
  .poster-c { left: 36%; }
  footer > div { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}