:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --bg: #061124;
  --bg-deep: #040b18;
  --paper: #e8f1ff;
  --muted: #8ba0bd;
  --muted-2: #637b9e;
  --cyan: #8fe8ff;
  --mint: #b8e875;
  --violet: #bea9ff;
  --line: rgba(143,232,255,.18);
  --line-soft: rgba(143,232,255,.1);
  --panel: rgba(8,28,55,.78);
  --gold: #e7bd63;
  --shadow: 0 26px 80px rgba(0,0,0,.34);
}
* { box-sizing: border-box; }
html { min-width: 320px; background: var(--bg-deep); scroll-behavior: smooth; }
body { min-height: 100vh; margin: 0; overflow-x: hidden; color: var(--paper); background: radial-gradient(circle at 80% 7%, rgba(58,144,176,.16), transparent 27rem), linear-gradient(150deg, #061124, #040b18 74%); }
body::before { position: fixed; inset: 0; z-index: -2; content: ""; background: radial-gradient(25rem 17rem at var(--mx, 65vw) var(--my, 22vh), rgba(143,232,255,.08), transparent 70%); pointer-events: none; }
a { color: inherit; }
button { font: inherit; }
.download-ambient { position: fixed; z-index: -1; width: 32rem; height: 32rem; border-radius: 50%; filter: blur(70px); opacity: .16; pointer-events: none; }
.download-ambient-a { top: -19rem; right: -8rem; background: #3ba9c9; }
.download-ambient-b { display: none; }
.download-grid-lines { display: none; }
.download-shell { width: min(100% - 34px, 1220px); margin: 0 auto; padding: 25px 0 38px; }
.download-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-bottom: 18px; border-bottom: 1px solid var(--line-soft); }
.product-lockup { display: inline-flex; align-items: center; gap: 8px; color: var(--paper); text-decoration: none; }
.studio-mark { display: block; width: 30px; height: 30px; object-fit: contain; }
.studio-lockup-copy { color: var(--paper); font-family: "Microsoft YaHei", "SimHei", "Noto Sans CJK SC", Arial, sans-serif; font-size: 10px; font-weight: 600; letter-spacing: .04em; }
.back-link { display: inline-flex; min-height: 38px; align-items: center; justify-content: center; gap: 6px; padding: 0 11px; border: 1px solid rgba(143,232,255,.28); border-radius: 8px; color: var(--cyan); background: rgba(143,232,255,.04); font-family: "Microsoft YaHei", "SimHei", "Noto Sans CJK SC", Arial, sans-serif; font-size: 11px; font-weight: 600; text-decoration: none; white-space: nowrap; }
.back-link:hover { color: var(--paper); border-color: rgba(143,232,255,.52); background: rgba(143,232,255,.09); }
.download-hero { display: block; min-height: 0; padding: 60px 0 56px; }
.download-hero-copy { max-width: 760px; }
.eyebrow { margin: 0 0 15px; color: var(--cyan); font-size: 10px; font-weight: 760; letter-spacing: .2em; text-transform: uppercase; }
h1, h2, p { margin-top: 0; }
h1 { max-width: 640px; margin-bottom: 21px; color: var(--paper); font-size: clamp(38px, 5.4vw, 66px); font-weight: 450; letter-spacing: -.08em; line-height: .98; text-wrap: balance; text-shadow: 0 0 36px rgba(143,232,255,.12); }
h1 em, h2 em { color: var(--mint); font-style: normal; }
.download-intro { max-width: 520px; margin-bottom: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.channel-switch { display: inline-flex; gap: 4px; margin-top: 22px; padding: 4px; border: 1px solid var(--line); border-radius: 999px; background: rgba(8,27,52,.84); }
.channel-switch button { border: 0; border-radius: 999px; padding: 9px 14px; color: var(--muted); background: transparent; cursor: pointer; font-size: 10px; }
.channel-switch button[aria-selected="true"] { color: #061124; background: var(--mint); font-weight: 700; }
.channel-status { margin: 9px 0 0; color: var(--muted-2); font-size: 10px; line-height: 1.6; }
.download-section { padding: 50px 0 62px; border-top: 1px solid var(--line-soft); }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 25px; }

.section-heading h2 { margin: 0 0 8px; color: var(--paper); font-size: clamp(26px, 3vw, 39px); font-weight: 430; letter-spacing: -.055em; line-height: 1; }
.section-heading > div > p:not(.eyebrow) { margin-bottom: 0; color: var(--muted); font-size: 11px; line-height: 1.7; }
.section-index { color: var(--muted-2); font: 10px/1.5 Consolas, monospace; letter-spacing: .16em; }
.platform-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
.platform-card { display: flex; min-height: 350px; flex-direction: column; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: linear-gradient(145deg, rgba(12,42,70,.78), rgba(6,20,40,.88)); box-shadow: 0 18px 48px rgba(0,0,0,.22); transition: transform .22s ease, border-color .22s ease; }
.platform-card:hover { border-color: rgba(143,232,255,.5); transform: translateY(-4px); }
.platform-visual { position: relative; overflow: hidden; height: 145px; background: #061124; }
.platform-visual img { display: block; width: 100%; height: 100%; object-fit: cover; filter: saturate(.74) contrast(1.02); }
.platform-card[data-platform="windows"] .platform-visual img { object-position: center 56%; }
.platform-badge { position: absolute; top: 12px; left: 12px; padding: 6px 7px; border: 1px solid rgba(184,232,117,.46); border-radius: 4px; color: var(--mint); background: rgba(3,11,24,.65); font: 9px/1 Consolas, monospace; letter-spacing: .1em; }
.platform-body { display: flex; min-height: 200px; flex-direction: column; padding: 17px 18px 17px; }
.platform-head { display: flex; align-items: flex-start; gap: 11px; }
.platform-seq { color: var(--mint); font: 12px/1.5 Consolas, monospace; }
.platform-kicker { margin: 0 0 4px; color: var(--muted-2); font-size: 9px; letter-spacing: .16em; text-transform: uppercase; }
.platform-head h3 { margin: 0; color: var(--paper); font-size: 21px; font-weight: 500; letter-spacing: -.035em; }
.platform-description { min-height: 40px; margin: 15px 0 0; color: var(--muted); font-size: 11px; line-height: 1.7; }
.platform-meta { display: flex; justify-content: space-between; gap: 12px; margin-top: auto; padding: 12px 0 0; border-top: 1px solid rgba(143,232,255,.12); color: var(--muted-2); font: 10px/1.5 Consolas, monospace; }
.platform-version { color: var(--paper); }
.platform-actions { display: flex; align-items: center; gap: 13px; margin-top: 14px; }
.download-button { display: inline-flex; min-height: 39px; align-items: center; justify-content: center; flex: 1; border: 1px solid rgba(184,232,117,.56); border-radius: 7px; color: #061124; background: var(--mint); box-shadow: 0 9px 20px rgba(184,232,117,.11); font-size: 10px; font-weight: 760; text-decoration: none; transition: transform .2s ease, box-shadow .2s ease; }
.download-button:hover { box-shadow: 0 13px 25px rgba(184,232,117,.22); transform: translateY(-2px); }
.download-footer { display: flex; justify-content: space-between; gap: 15px; padding-top: 18px; border-top: 1px solid var(--line-soft); color: var(--muted-2); font-size: 10px; }
button:focus-visible, a:focus-visible { outline: 2px solid var(--mint); outline-offset: 3px; }
@media (max-width: 980px) {
  .download-hero { padding-top: 44px; }
  .download-hero-copy { max-width: 780px; }

  .platform-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 760px) {
  .download-shell { width: min(100% - 28px, 1220px); padding-top: 15px; }
  .download-header { align-items: flex-start; }
  h1 { font-size: clamp(36px, 11vw, 60px); }
  .platform-grid, .mobile-grid { grid-template-columns: 1fr; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .download-footer { flex-direction: column; }
}
@media (max-width: 560px) {
  .studio-mark { width: 28px; height: 28px; }
  .studio-lockup-copy { font-size: 9px; }
  .back-link { font-size: 9px; }
  .channel-switch { width: 100%; }
  .channel-switch button { flex: 1; }
  .platform-visual { height: 165px; }
}
.download-page .channel-switch button, .download-page .download-button, .download-page .back-link { position: relative; isolation: isolate; transform: translate3d(0,-1px,0); transform-origin: center; box-shadow: 0 3px 0 rgba(1,9,22,.78), 0 11px 20px rgba(0,0,0,.26), inset 0 1px rgba(255,255,255,.1); transition: transform .22s cubic-bezier(.2,.75,.25,1), box-shadow .22s cubic-bezier(.2,.75,.25,1), border-color .22s ease, background .22s ease; }
.download-page .channel-switch button:hover, .download-page .channel-switch button:focus-visible, .download-page .download-button:hover, .download-page .download-button:focus-visible, .download-page .back-link:hover, .download-page .back-link:focus-visible { transform: translate3d(0,-3px,0); box-shadow: 0 5px 0 rgba(1,9,22,.78), 0 16px 28px rgba(0,0,0,.3), inset 0 1px rgba(255,255,255,.16); }
.download-page .channel-switch button:active, .download-page .download-button:active, .download-page .back-link:active { transform: translate3d(0,1px,0); box-shadow: 0 1px 0 rgba(1,9,22,.85), 0 4px 10px rgba(0,0,0,.24), inset 0 2px 4px rgba(1,9,22,.18); }
.download-page .channel-switch button::before, .download-page .download-button::before, .download-page .back-link::before { position: absolute; top: 1px; right: 7px; left: 7px; height: 1px; content: ""; background: linear-gradient(90deg, transparent, rgba(255,255,255,.25), transparent); pointer-events: none; }

.mobile-section { padding: 10px 0 62px; border-top: 1px solid var(--line-soft); }
.mobile-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; }
.mobile-card .platform-visual img { object-position: center 48%; }
.mobile-dock { display: none; }
@media (max-width: 760px) {
  .mobile-dock { position: fixed; right: 9px; bottom: calc(9px + env(safe-area-inset-bottom)); left: 9px; z-index: 50; display: grid; grid-template-columns: repeat(5, 1fr); gap: 2px; padding: 6px 8px; border: 1px solid rgba(143,232,255,.18); border-radius: 22px; background: rgba(5,18,37,.9); box-shadow: 0 14px 40px rgba(0,0,0,.38), inset 0 1px rgba(255,255,255,.05); backdrop-filter: blur(18px); }
  .mobile-dock a { position: relative; display: grid; min-height: 48px; place-items: center; align-content: center; gap: 3px; border-radius: 15px; color: #7891af; text-decoration: none; transition: color .2s ease, background .2s ease, transform .2s ease; }
  .mobile-dock a .dock-icon { width: 21px; height: 21px; object-fit: contain; }
  .mobile-dock a small { font-size: 9px; letter-spacing: .04em; }
  .mobile-dock a.active, .mobile-dock a:active { color: var(--paper); background: rgba(143,232,255,.08); transform: translateY(-1px); }
  .mobile-dock a.active::before { position: absolute; top: 4px; width: 18px; height: 2px; border-radius: 4px; background: linear-gradient(90deg, var(--cyan), var(--mint)); box-shadow: 0 0 12px var(--cyan); content: ""; }
  .download-shell { padding-bottom: 100px; }
}
.page-transition { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; overflow: hidden; visibility: hidden; pointer-events: none; opacity: 0; background: #040b18; transition: opacity .16s ease, visibility 0s linear .16s; }
.page-transition::before { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 0%, rgba(143,232,255,.07) 48%, transparent 52%); transform: translateY(-100%); content: ""; }
.page-transition-code { position: relative; color: rgba(143,232,255,.78); font: 10px/1.4 Consolas, monospace; letter-spacing: .16em; text-transform: uppercase; }
.page-transition-line { position: absolute; width: 42vw; max-width: 420px; height: 1px; background: linear-gradient(90deg, transparent, var(--cyan), transparent); transform: scaleX(.2); transform-origin: center; }
.page-transition-dot { position: absolute; width: 4px; height: 4px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 12px var(--mint); }
.page-transition-dot-a { transform: translate(-24vw, -9vh); }
.page-transition-dot-b { transform: translate(27vw, 11vh); background: var(--cyan); box-shadow: 0 0 12px var(--cyan); }
html.page-leaving .page-transition { visibility: visible; opacity: 1; transition-delay: 0s; }
html.page-leaving .page-transition::before { animation: page-transition-scan .18s ease-out both; }
html.page-leaving .page-transition-code { animation: page-transition-code .17s ease-out both; }
html.page-leaving .page-transition-line { animation: page-transition-line .17s ease-out both; }
html.page-leaving .page-transition-dot-a { animation: page-transition-dot-a .17s ease-out both; }
html.page-leaving .page-transition-dot-b { animation: page-transition-dot-b .17s ease-out both; }
@keyframes page-transition-scan { from { transform: translateY(-100%); } to { transform: translateY(100%); } }
@keyframes page-transition-code { from { opacity: 0; letter-spacing: .28em; transform: translateY(5px); } to { opacity: 1; letter-spacing: .16em; transform: translateY(0); } }
@keyframes page-transition-line { from { opacity: 0; transform: scaleX(.2); } to { opacity: 1; transform: scaleX(1); } }
@keyframes page-transition-dot-a { from { opacity: 0; transform: translate(-24vw, -9vh) scale(.4); } to { opacity: 1; transform: translate(-5vw, -1vh) scale(1); } }
@keyframes page-transition-dot-b { from { opacity: 0; transform: translate(27vw, 11vh) scale(.4); } to { opacity: 1; transform: translate(7vw, 2vh) scale(1); } }
@media (prefers-reduced-motion: reduce) { .page-transition { display: none; } }