:root {
  color-scheme: dark;
  --bg: #0b0c0e;
  --surface: #131519;
  --surface-2: #191c21;
  --card: #17191d;
  --text: #f5f5f3;
  --muted: #969aa3;
  --line: rgba(255,255,255,.1);
  --orange: #f39a28;
  --orange-deep: #db6f20;
  --green: #36d879;
  --shell: min(1460px, calc(100% - 72px));
}

*, *::before, *::after { box-sizing: border-box; }
html { min-width: 320px; background: var(--bg); scroll-behavior: smooth; scroll-padding-top: 118px; }
body, h1, h2, h3, p, figure { margin: 0; }
body {
  min-width: 320px;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

.platform-header {
  position: sticky;
  top: 0;
  z-index: 20;
  width: 100%;
  min-height: 82px;
  padding-inline: max(36px, calc((100vw - 1460px) / 2));
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  border-bottom: 1px solid rgba(255,255,255,.07);
  background: rgba(11,12,14,.92);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}
.brand-lockup, .footer-brand { display: flex; align-items: center; gap: 13px; }
.brand-lockup img, .footer-brand img { border-radius: 15px; filter: drop-shadow(0 8px 18px rgba(243,154,40,.18)); }
.brand-lockup div, .footer-brand div { display: grid; gap: 2px; }
.brand-lockup strong, .footer-brand strong { font-size: 20px; letter-spacing: .08em; }
.brand-lockup span, .footer-brand span { color: #767a82; font-size: 8px; letter-spacing: .2em; }
.category-nav { justify-self: center; display: flex; align-items: center; gap: clamp(13px, 1.6vw, 26px); white-space: nowrap; }
.category-nav a { position: relative; padding: 31px 0; color: #a8abb2; font-size: 10px; transition: color .25s ease; }
.category-nav a::after { content: ""; position: absolute; right: 0; bottom: 21px; left: 0; height: 2px; background: var(--orange); transform: scaleX(0); transition: transform .25s ease; }
.category-nav a:hover, .category-nav a:focus-visible { color: var(--text); }
.category-nav a:hover::after, .category-nav a:focus-visible::after { transform: scaleX(1); }
.official-badge { justify-self: end; display: flex; align-items: center; gap: 9px; color: #b7bac0; font-size: 10px; letter-spacing: .08em; }
.official-badge i { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 14px rgba(54,216,121,.7); }

.platform-hero {
  position: relative;
  width: var(--shell);
  min-height: 700px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(400px, 1.15fr) minmax(370px, .85fr);
  align-items: stretch;
  overflow: hidden;
  border-radius: 24px;
  background: #160f0d;
  isolation: isolate;
}
.hero-backdrop { position: absolute; z-index: -3; inset: -34px; background: url("../images/hero-platform.png") center 39% / cover no-repeat; filter: blur(24px) saturate(.74) brightness(.47); transform: scale(1.06); }
.hero-shade { position: absolute; z-index: -2; inset: 0; background: linear-gradient(90deg, rgba(9,10,12,.98) 0%, rgba(9,10,12,.92) 38%, rgba(9,10,12,.42) 68%, rgba(9,10,12,.15) 100%); }
.hero-shade::after { content: ""; position: absolute; inset: auto 0 0; height: 38%; background: linear-gradient(180deg, transparent, rgba(11,12,14,.88)); }
.hero-copy { align-self: center; z-index: 2; max-width: 760px; padding: clamp(50px, 6vw, 94px); }
.hero-label { color: var(--orange); font: 700 10px/1 monospace; letter-spacing: .2em; }
.hero-copy h1 { margin-top: 28px; font-size: clamp(50px, 5.4vw, 80px); font-weight: 700; line-height: 1.1; letter-spacing: -.055em; }
.hero-copy > p { max-width: 650px; margin-top: 28px; color: #c4c6ca; font-size: 15px; line-height: 1.9; }
.hero-facts { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; }
.hero-facts span { padding: 9px 13px; border: 1px solid rgba(255,255,255,.16); border-radius: 999px; background: rgba(0,0,0,.22); color: #e7e7e5; font-size: 10px; }
.hero-copy small { display: block; max-width: 620px; margin-top: 42px; color: #777b82; font-size: 9px; line-height: 1.7; }
.hero-poster { position: relative; z-index: 1; display: flex; align-items: center; justify-content: flex-end; padding-right: clamp(18px, 4vw, 60px); }
.hero-poster::before { content: ""; position: absolute; left: -20%; top: 8%; width: 1px; height: 84%; background: linear-gradient(180deg, transparent, rgba(255,255,255,.18), transparent); }
.hero-poster img { width: min(430px, 88%); max-height: 660px; object-fit: contain; border-radius: 18px; box-shadow: 0 28px 70px rgba(0,0,0,.5); }

.catalog { width: var(--shell); margin: 115px auto 0; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 55px; margin-bottom: 42px; }
.section-heading > div span { color: var(--orange); font-size: 10px; font-weight: 700; letter-spacing: .16em; }
.section-heading h2 { margin-top: 10px; font-size: clamp(36px, 4vw, 56px); line-height: 1.1; }
.section-heading > p { max-width: 500px; color: var(--muted); font-size: 12px; line-height: 1.8; text-align: right; }
.catalog-groups { border-top: 1px solid var(--line); }
.catalog-group { padding: 34px 0 58px; border-bottom: 1px solid var(--line); scroll-margin-top: 118px; }
.group-heading { display: flex; justify-content: space-between; align-items: end; gap: 35px; margin-bottom: 28px; }
.group-heading span { color: var(--orange); font: 700 9px/1.2 monospace; letter-spacing: .17em; }
.group-heading h3 { margin-top: 8px; font-size: 24px; }
.group-heading > p { color: #777c84; font-size: 10px; }
.poster-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 34px 16px; }
.poster-card { min-width: 0; }
.poster-crop { position: relative; aspect-ratio: 2 / 3; overflow: hidden; border-radius: 13px; background: #202329; box-shadow: 0 12px 28px rgba(0,0,0,.22); }
.poster-crop::after { content: ""; position: absolute; inset: 0; border: 1px solid rgba(255,255,255,.08); border-radius: inherit; pointer-events: none; }
.poster-crop img { position: absolute; left: var(--left); top: var(--top); width: 631.6%; max-width: none; height: auto; transition: transform .42s ease, filter .42s ease; }
.poster-card:hover .poster-crop img { transform: scale(1.025); filter: brightness(1.06); }
.poster-card > div { padding: 15px 3px 0; }
.poster-card h3 { min-height: 2.9em; overflow: hidden; font-size: 15px; font-weight: 600; line-height: 1.45; }
.poster-card p { margin-top: 7px; color: #747982; font-size: 10px; line-height: 1.5; }

.feature-board { width: var(--shell); min-height: 650px; margin: 130px auto 0; display: grid; grid-template-columns: 1.1fr .9fr; overflow: hidden; border-radius: 24px; background: var(--surface-2); }
.feature-image { position: relative; min-height: 650px; overflow: hidden; }
.feature-image::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, transparent 72%, var(--surface-2)); }
.feature-image img { width: 100%; height: 100%; object-fit: cover; }
.feature-copy { display: flex; flex-direction: column; justify-content: center; padding: clamp(46px, 6vw, 90px); }
.feature-copy > span { color: var(--orange); font: 700 10px/1.2 monospace; letter-spacing: .18em; }
.feature-copy h2 { margin-top: 25px; font-size: clamp(48px, 5vw, 74px); line-height: 1.1; letter-spacing: -.045em; }
.feature-copy h2 em { color: #f1b45f; font-style: normal; }
.feature-copy > p { margin-top: 27px; color: #a8abb2; font-size: 14px; line-height: 1.95; }
.feature-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 34px; }
.feature-tags span { padding: 8px 11px; border-radius: 7px; background: #22262c; color: #c3c5ca; font-size: 10px; }

.genre-bands { width: var(--shell); margin: 130px auto; }
.band-list { border-top: 1px solid var(--line); }
.band-list article { display: grid; grid-template-columns: 160px minmax(300px, .8fr) 1.2fr; align-items: center; gap: 40px; min-height: 128px; border-bottom: 1px solid var(--line); }
.band-list article > span { color: var(--orange); font-size: 11px; font-weight: 700; letter-spacing: .08em; }
.band-list h3 { font-size: 24px; font-weight: 600; }
.band-list p { color: var(--muted); font-size: 12px; line-height: 1.8; }

.brand-panel { width: var(--shell); min-height: 540px; margin: 0 auto 130px; display: grid; grid-template-columns: 240px 1.2fr .8fr; align-items: center; gap: clamp(35px, 5vw, 75px); padding: clamp(45px, 6vw, 90px); overflow: hidden; border-radius: 24px; background: linear-gradient(120deg, #16181c, #101216); box-shadow: inset 0 0 0 1px var(--line); scroll-margin-top: 118px; }
.brand-symbol { position: relative; width: 210px; height: 210px; justify-self: center; display: grid; place-items: center; border: 1px solid rgba(243,154,40,.18); border-radius: 38px; background: linear-gradient(145deg, rgba(243,154,40,.12), rgba(255,255,255,.025)); box-shadow: inset 0 0 42px rgba(243,154,40,.06); }
.brand-symbol img { width: 70%; height: auto; object-fit: contain; filter: drop-shadow(0 18px 28px rgba(243,154,40,.22)); }
.brand-story > span { color: var(--orange); font: 700 10px/1.2 monospace; letter-spacing: .2em; }
.brand-story h2 { margin-top: 24px; font-size: clamp(44px, 5vw, 68px); }
.brand-story strong { display: block; margin-top: 18px; color: #f3bd70; font-family: "Songti SC", STSong, serif; font-size: 21px; font-weight: 500; letter-spacing: .1em; }
.brand-story p { margin-top: 30px; color: #9b9fa7; font-size: 13px; line-height: 1.95; }
.brand-points { border-left: 1px solid var(--line); display: grid; grid-template-columns: repeat(2, 1fr); }
.brand-points p { padding: 18px 0 18px 28px; border-bottom: 1px solid var(--line); color: #c2c5ca; font-size: 12px; }

.site-statement { width: var(--shell); margin: 0 auto 100px; display: grid; grid-template-columns: .65fr 1.35fr; gap: clamp(45px, 7vw, 110px); padding-top: 35px; border-top: 1px solid var(--line); }
.site-statement header span { color: var(--orange); font-size: 10px; font-weight: 700; letter-spacing: .14em; }
.site-statement h2 { margin-top: 15px; font-size: 30px; line-height: 1.3; }
.site-statement > div p { padding: 18px 0; border-bottom: 1px solid var(--line); color: #80858d; font-size: 11px; line-height: 1.8; }

.platform-footer { min-height: 190px; display: grid; grid-template-columns: 1.3fr 1fr 1fr; align-items: center; gap: 35px; padding: 36px max(36px, calc((100vw - 1460px) / 2)); border-top: 1px solid var(--line); background: #07080a; }
.platform-footer > p { color: #666b73; font-size: 10px; line-height: 1.8; }

.js .reveal { opacity: 0; transform: translateY(20px); transition: opacity .7s ease, transform .7s ease; }
.js .reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1200px) {
  :root { --shell: min(100% - 48px, 1080px); }
  .platform-header { grid-template-columns: 1fr auto; gap: 8px 24px; padding: 10px 24px 0; }
  .category-nav { grid-column: 1 / -1; grid-row: 2; justify-self: stretch; justify-content: flex-start; gap: 24px; overflow-x: auto; scrollbar-width: none; }
  .category-nav::-webkit-scrollbar { display: none; }
  .category-nav a { padding: 9px 0 15px; }
  .category-nav a::after { bottom: 8px; }
  .platform-hero { grid-template-columns: 1fr .72fr; }
  .hero-copy { padding: 58px; }
  .poster-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px 15px; }
  .feature-board { min-height: 580px; }
  .feature-image { min-height: 580px; }
  .brand-panel { grid-template-columns: 220px 1.45fr; }
  .brand-points { grid-column: 2; border-left: 0; display: grid; grid-template-columns: repeat(2, 1fr); }
  .brand-points p { padding-left: 0; }
}

@media (max-width: 820px) {
  :root { --shell: calc(100% - 28px); }
  .platform-header { min-height: 76px; padding-inline: 14px; }
  .brand-lockup img { width: 44px; height: 44px; border-radius: 13px; }
  .brand-lockup strong { font-size: 17px; }
  .official-badge { font-size: 8px; }
  .platform-hero { width: 100%; min-height: 0; grid-template-columns: 1fr; border-radius: 0; }
  .hero-backdrop { background-position: center 52%; }
  .hero-shade { background: linear-gradient(180deg, rgba(8,9,11,.48), rgba(8,9,11,.94) 58%, #090a0c 100%); }
  .hero-poster { grid-row: 1; min-height: 570px; justify-content: center; padding: 25px 0 0; }
  .hero-poster::before { display: none; }
  .hero-poster img { width: min(360px, 80vw); max-height: 550px; }
  .hero-copy { grid-row: 2; padding: 45px 22px 60px; }
  .hero-copy h1 { font-size: clamp(43px, 12.5vw, 61px); }
  .section-heading { display: grid; gap: 18px; margin-bottom: 30px; }
  .section-heading > p { text-align: left; }
  .catalog { margin-top: 82px; }
  .group-heading { display: grid; gap: 9px; }
  .poster-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 12px; }
  .poster-card h3 { min-height: 2.9em; font-size: 14px; }
  .feature-board { margin-top: 90px; grid-template-columns: 1fr; }
  .feature-image { min-height: 0; aspect-ratio: 1; }
  .feature-image::after { background: linear-gradient(180deg, transparent 75%, var(--surface-2)); }
  .feature-copy { padding: 38px 23px 46px; }
  .feature-copy h2 { font-size: 48px; }
  .genre-bands { margin: 90px auto; }
  .band-list article { grid-template-columns: 1fr; gap: 10px; padding: 27px 0; }
  .band-list h3 { font-size: 21px; }
  .brand-panel { min-height: 0; margin-bottom: 90px; grid-template-columns: 1fr; padding: 42px 24px; }
  .brand-symbol { width: 170px; height: 170px; margin-inline: auto; border-radius: 30px; }
  .brand-points { grid-column: auto; grid-template-columns: 1fr; }
  .site-statement { margin-bottom: 75px; grid-template-columns: 1fr; gap: 25px; }
  .platform-footer { grid-template-columns: 1fr; align-items: start; padding: 45px 20px; }
}

@media (max-width: 420px) {
  .official-badge { display: none; }
  .platform-header { grid-template-columns: 1fr; }
  .category-nav { grid-column: 1; }
  .hero-poster { min-height: 520px; }
  .hero-poster img { max-height: 500px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .js .reveal { opacity: 1; transform: none; }
}