:root {
  --bg: #0a0b12;
  --panel: rgba(24, 22, 36, .72);
  --line: rgba(255, 255, 255, .1);
  --text: #f6f2fb;
  --muted: #aaa6b8;
  --accent: #e6477a;
  --violet: #9a67f5;
  --lime: #caff74;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; color: var(--text); background: var(--bg);
  font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.65; overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.container { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }
.section { padding: 84px 0; position: relative; }
.eyebrow {
  display: flex; align-items: center; gap: 8px; color: var(--lime);
  font-size: 12px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 24px; height: 1px; background: currentColor; }
h2 { margin: 12px 0 32px; font-size: clamp(30px, 5vw, 48px); letter-spacing: -.06em; line-height: 1.12; }

.nav {
  position: fixed; inset: 0 0 auto; z-index: 20; height: 72px;
  border-bottom: 1px solid transparent; transition: .3s ease;
}
.nav.scrolled { background: rgba(10, 11, 18, .82); border-color: var(--line); backdrop-filter: blur(16px); }
.nav-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -.04em; }
.brand-mark {
  width: 28px; height: 28px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.45);
  font-size: 13px; transform: rotate(45deg);
}
.brand-mark span { transform: rotate(-45deg); }
.nav-actions { display: flex; align-items: center; gap: 20px; color: #d8d3e0; font-size: 14px; }
.nav-link { transition: color .2s; }
.nav-link:hover { color: white; }
.nav-download { padding: 9px 14px; border: 1px solid rgba(255,255,255,.45); border-radius: 100px; }

.hero {
  min-height: 720px; padding: 145px 0 74px; display: flex; align-items: end; isolation: isolate; overflow: hidden;
  background: radial-gradient(circle at 72% 32%, rgba(139, 63, 148, .31), transparent 29%), linear-gradient(135deg, #0a0b12 24%, #1b1627 120%);
}
.hero::before {
  content: ""; position: absolute; z-index: -2; inset: 0;
  background: repeating-linear-gradient(90deg, transparent 0 9.5%, rgba(255,255,255,.028) 9.6% 10%);
  mask-image: linear-gradient(to bottom, transparent, #000 28%, #000);
}
.glow { position: absolute; z-index: -1; border-radius: 50%; filter: blur(1px); opacity: .75; }
.glow-a { width: 270px; height: 270px; right: -65px; top: 145px; background: #e0406c; filter: blur(85px); }
.glow-b { width: 300px; height: 300px; left: 18%; bottom: -170px; background: #5634ae; filter: blur(105px); }
.city { position: absolute; z-index: -1; right: 0; bottom: 0; width: min(60vw, 780px); height: 78%; opacity: .75; }
.building { position: absolute; bottom: 0; width: 10%; background: linear-gradient(90deg, #181a28, #0d0d17); box-shadow: inset 2px 0 rgba(255,255,255,.04); }
.building::after {
  content: ""; position: absolute; inset: 8px 22% 0; opacity: .35;
  background: repeating-linear-gradient(to bottom, rgba(244, 225, 166, .55) 0 3px, transparent 3px 16px);
}
.b1 { height: 46%; left: 4%; }.b2 { height: 67%; left: 15%; }.b3 { height: 38%; left: 27%; }.b4 { height: 84%; left: 40%; }
.b5 { height: 56%; left: 52%; }.b6 { height: 73%; left: 65%; }.b7 { height: 45%; left: 77%; }.b8 { height: 61%; left: 89%; }
.hero-content { width: min(710px, 100%); }
.status { display: inline-flex; gap: 8px; align-items: center; color: #e1dbe7; font-size: 13px; }
.status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 11px var(--lime); }
.hero h1 { margin: 18px 0 0; font-size: clamp(74px, 14vw, 150px); line-height: .85; letter-spacing: -.1em; font-weight: 800; }
.subtitle { margin: 25px 0 6px; color: #e6e0ed; font-size: clamp(22px, 4vw, 32px); letter-spacing: -.05em; }
.hook { margin: 0; color: var(--muted); font-size: 16px; }
.hero-bottom { display: flex; align-items: center; gap: 24px; margin-top: 34px; }
.btn {
  border: 0; cursor: pointer; display: inline-flex; justify-content: center; align-items: center; gap: 11px;
  padding: 14px 21px; border-radius: 100px; color: #17121d; background: var(--lime); font-weight: 800; transition: transform .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 12px 27px rgba(202, 255, 116, .22); }
.btn-arrow { font-size: 20px; line-height: 1; }
.episode-label { color: #cec8d4; font-size: 13px; }
.scroll-cue { position: absolute; right: 26px; bottom: 30px; color: #928d9d; font-size: 11px; writing-mode: vertical-rl; letter-spacing: .12em; }

.intro { background: #0d0e16; }
.intro-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 9%; align-items: start; }
.intro-copy { color: #c3bdcd; font-size: 17px; }
.intro-copy p { margin: 0 0 20px; }
.intro-copy p:first-child { color: #f2edf6; font-size: 20px; line-height: 1.7; }
.intro-number { color: rgba(255,255,255,.09); font-size: 90px; font-weight: 800; letter-spacing: -.1em; line-height: .8; }

.features { background: linear-gradient(180deg, #0d0e16, #11101a); }
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.card { min-height: 225px; padding: 22px; border: 1px solid var(--line); background: var(--panel); transition: transform .25s, border-color .25s; }
.card:hover { transform: translateY(-5px); border-color: rgba(202, 255, 116, .4); }
.card-icon { height: 42px; width: 42px; margin-bottom: 38px; display: grid; place-items: center; border: 1px solid #6c6676; border-radius: 50%; color: var(--lime); font-size: 18px; }
.card h3 { margin: 0 0 8px; font-size: 18px; letter-spacing: -.04em; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }

.visual-section { background: #0a0b12; }
.visual-heading { display: flex; align-items: end; justify-content: space-between; gap: 38px; margin-bottom: 32px; }
.visual-heading h2 { margin-bottom: 0; }
.visual-heading p { max-width: 385px; margin: 0; color: var(--muted); font-size: 14px; }
.visual-grid { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: 145px; gap: 12px; }
.visual-card { position: relative; min-width: 0; margin: 0; overflow: hidden; background: #1a1822; }
.visual-card-large { grid-column: span 2; grid-row: span 2; }
.visual-card:last-child { grid-column: span 2; }
.visual-card img { width: 100%; height: 100%; display: block; object-fit: cover; filter: saturate(.76) contrast(1.07); transition: transform .45s ease, filter .45s ease; }
.visual-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 38%, rgba(8, 7, 14, .78)); pointer-events: none; }
.visual-card:hover img { transform: scale(1.06); filter: saturate(1) contrast(1.05); }
.visual-card figcaption { position: absolute; z-index: 1; right: 13px; bottom: 10px; left: 13px; color: #f6f2fb; font-size: 12px; font-weight: 700; letter-spacing: .04em; }

.progress-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.progress-panel { padding: 25px; border: 1px solid var(--line); background: linear-gradient(135deg, rgba(154,103,245,.14), rgba(154,103,245,0)); }
.progress-header { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 14px; }
.progress-header strong { font-size: 17px; }.progress-header span { color: var(--lime); font-size: 13px; }
.track { height: 6px; border-radius: 99px; background: #292532; overflow: hidden; }
.track > span { display: block; width: 100%; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--violet), var(--accent), var(--lime)); }
.meta-list { margin: 20px 0 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.meta-list li { display: flex; justify-content: space-between; border-bottom: 1px solid var(--line); padding-bottom: 10px; color: var(--muted); font-size: 14px; }
.meta-list b { color: #e9e4ee; font-weight: 500; }

.reviews { padding-top: 20px; }
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.review { padding: 23px; margin: 0; border-top: 1px solid #766c86; background: #14131e; }
.review p { margin: 0 0 17px; font-size: 17px; line-height: 1.55; letter-spacing: -.03em; }
.review cite { color: #9d98a8; font-size: 12px; font-style: normal; }

.faq-section { background: #0d0e16; }
.faq-grid { display: grid; grid-template-columns: .78fr 1.22fr; gap: 9%; align-items: start; }
.faq-intro { max-width: 290px; margin: 0; color: var(--muted); }
.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 0;
  cursor: pointer; list-style: none; color: #f1ecf5; font-size: 17px; font-weight: 700;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary span { color: var(--lime); font-size: 23px; font-weight: 400; transition: transform .2s; }
.faq-item[open] summary span { transform: rotate(45deg); }
.faq-item p { max-width: 650px; margin: -4px 36px 20px 0; color: var(--muted); font-size: 14px; }

.cta-section { padding: 90px 0; }
.cta { position: relative; overflow: hidden; padding: 58px 25px; text-align: center; border: 1px solid rgba(255,255,255,.16); background: radial-gradient(circle at 50% 110%, #45236d, #17121e 55%, #111119); }
.cta::before, .cta::after { content: ""; position: absolute; width: 250px; height: 250px; border: 1px solid rgba(202,255,116,.14); border-radius: 50%; pointer-events: none; }
.cta::before { left: -130px; top: -135px; }.cta::after { right: -130px; bottom: -135px; }
.cta h2 { margin: 10px 0 10px; }.cta p { margin: 0 0 27px; color: #c4becb; }
.cta .btn { padding: 17px 27px; font-size: 16px; }
.backup { display: inline-block; margin-top: 19px; color: #afa7ba; font-size: 13px; text-decoration: underline; text-underline-offset: 4px; cursor: pointer; }
.note { display: block; margin-top: 14px; color: #888191; font-size: 12px; }

footer { padding: 26px 0 34px; border-top: 1px solid var(--line); color: #777180; font-size: 12px; }
.footer-inner { display: flex; justify-content: space-between; gap: 18px; }
.footer-inner a { color: #a39aa9; text-decoration: underline; text-underline-offset: 3px; }
.modal { position: fixed; z-index: 40; inset: 0; display: grid; place-items: center; padding: 20px; background: rgba(3,3,7,.73); opacity: 0; pointer-events: none; transition: opacity .2s; }
.modal.open { opacity: 1; pointer-events: auto; }
.modal-box { width: min(390px, 100%); padding: 28px; position: relative; border: 1px solid var(--line); background: #191721; box-shadow: 0 20px 60px rgba(0,0,0,.45); transform: translateY(10px); transition: transform .2s; }
.modal.open .modal-box { transform: translateY(0); }
.modal h3 { margin: 0 0 8px; font-size: 23px; }.modal p { color: var(--muted); font-size: 14px; }
.modal-close { position: absolute; top: 10px; right: 13px; padding: 4px; border: 0; color: #c8c1ce; background: transparent; cursor: pointer; font-size: 22px; }
.modal .btn { width: 100%; margin-top: 8px; }

@media (max-width: 760px) {
  .container { width: min(100% - 32px, 560px); }.section { padding: 60px 0; }
  .nav { height: 62px; }.nav-link { display: none; }.nav-actions { gap: 0; }
  .hero { min-height: 680px; padding: 130px 0 62px; }.city { width: 130%; right: -48%; height: 61%; opacity: .5; }
  .hero h1 { font-size: clamp(68px, 22vw, 112px); }.hero-bottom { align-items: flex-start; flex-direction: column; gap: 12px; }
  .scroll-cue { display: none; }.intro-grid, .progress-grid { grid-template-columns: 1fr; gap: 26px; }.intro-number { font-size: 65px; }
  .cards { grid-template-columns: repeat(2, 1fr); }.card { min-height: 200px; padding: 18px; }.card-icon { margin-bottom: 28px; }
  .visual-heading { display: block; margin-bottom: 24px; }.visual-heading h2 { margin-bottom: 16px; }.visual-grid { grid-template-columns: repeat(2, 1fr); grid-auto-rows: 145px; gap: 8px; }.visual-card-large { grid-column: span 2; }.visual-card:last-child { grid-column: span 2; }
  .review-grid { grid-template-columns: 1fr; }.review { padding: 19px; }.reviews { padding-top: 0; }
  .faq-grid { grid-template-columns: 1fr; gap: 12px; }.faq-item summary { font-size: 16px; }.faq-item p { margin-right: 0; }
  .cta-section { padding: 60px 0; }.cta { padding: 48px 18px; }.footer-inner { flex-direction: column; gap: 8px; }
}