:root {
  --bg:#3B44F5;
  --bg-deep:#2E36DF;
  --bg-lift:#5E67FF;
  --border:#5E67FF;
  --panel:#FAF8FD;
  --surface:#FFFFFF;
  --surface-tint:#F3F1FA;
  --ink:#16142A;
  --ink-hover:#2A2745;
  --ink-2:#4A4766;
  --ink-3:#6E6B88;
  --ink-on-grad:rgb(22 20 42 / .58);
  --line:rgb(22 20 42 / .09);
  --line-strong:rgb(22 20 42 / .16);
  --track:rgb(22 20 42 / .14);
  --veil:rgb(255 255 255 / .08);
  --scrim:rgb(22 20 42 / .5);
  --clear:rgb(255 255 255 / 0);
  --mask-solid:#000000;
  --text:#FFFFFF;
  --text-muted:#D3D7FF;
  --accent:#FF5C8A;
  --accent-dark:#E23E6E;
  --accent-readable:#AD2450;
  --apricot:#FFA24C;
  --pink:#FFB3CF;
  --peach:#FFD2A8;
  --mist-pink:rgb(255 179 207 / .62);
  --mist-apricot:rgb(255 210 168 / .72);
  --success:#3FE0A0;
  --success-ring:rgb(63 224 160 / .24);
  --warn:#FFC24D;
  --error:#FF4D5E;
  --grad:linear-gradient(135deg,var(--accent) 0%,var(--apricot) 100%);
  --grad-side:linear-gradient(172deg,var(--accent) 0%,var(--apricot) 100%);
  --grad-text:linear-gradient(92deg,var(--accent-dark) 0%,var(--accent) 42%,var(--apricot) 100%);
  --font-display:"Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --fs-h1:clamp(34px,calc(2.2vw + 16px),48px);
  --fs-h2:clamp(26px,3vw,36px);
  --fs-h3:22px;
  --fs-body:16px;
  --weight-title:900;
  --r-panel:36px;
  --r-window:24px;
  --r-card:20px;
  --r-chip:12px;
  --r-small:10px;
  --r-pill:999px;
  --r-round:50%;
  --gutter:clamp(16px,3.4vw,48px);
  --content-width:1184px;
  --reading-width:800px;
  --head-width:1280px;
  --head-height:72px;
  --space-1:8px;
  --space-2:16px;
  --space-3:24px;
  --space-4:32px;
  --space-5:48px;
  --space-6:72px;
  --space-7:96px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --duration:.2s;
  --shadow-panel:drop-shadow(0 28px 36px rgb(18 20 120 / .34));
  --shadow-window:0 1px 2px rgb(22 20 42 / .06),0 14px 28px -10px rgb(22 20 42 / .12),0 52px 96px -28px rgb(46 54 223 / .42);
  --shadow-card:0 1px 2px rgb(22 20 42 / .05),0 10px 24px -12px rgb(22 20 42 / .18);
  --shadow-btn:inset 0 1px 0 rgb(255 255 255 / .12),0 12px 24px -10px rgb(22 20 42 / .5);
  --shadow-knob:0 1px 2px rgb(22 20 42 / .28);
  --grain:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  --wave-top:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 160 28' preserveAspectRatio='xMidYMid slice'%3E%3Cpath d='M0 14Q40 -14 80 14T160 14V28H0Z'/%3E%3C/svg%3E");
  --wave-bot:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 160 28' preserveAspectRatio='xMidYMid slice'%3E%3Cpath d='M0 14Q40 42 80 14T160 14V0H0Z'/%3E%3C/svg%3E");
}
*,*::before,*::after {box-sizing:border-box}
html {scroll-behavior:smooth;scroll-padding-top:24px}
html,body {margin:0;min-width:0}
html.nav-open {overflow:hidden}
body {background:var(--bg);color:var(--text);font:400 var(--fs-body)/1.75 var(--font-body);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg {max-width:100%;vertical-align:middle}
img {height:auto}
button,input,select,textarea {font:inherit}
button,a {-webkit-tap-highlight-color:var(--clear)}
button {cursor:pointer}
a {color:inherit;text-underline-offset:.22em}
button {color:inherit}
[hidden] {display:none!important}
:focus-visible {outline:2px solid currentColor;outline-offset:4px}
h1,h2,h3 {font-family:var(--font-display);font-weight:var(--weight-title);line-height:1.2;letter-spacing:-.015em;text-wrap:balance;overflow-wrap:normal}
h1 {font-size:var(--fs-h1)}
h2 {font-size:var(--fs-h2)}
h3 {font-size:var(--fs-h3)}
h1,h2,h3,p {margin-top:0}
p {margin-bottom:1.25em}
code,kbd,pre {font-family:var(--font-mono)}
code {overflow-wrap:anywhere}
pre {max-width:100%;min-width:0;overflow-x:auto;padding:24px;border-radius:var(--r-card);background:var(--ink);color:var(--text-muted);font-size:13px;line-height:1.8;tab-size:2}
pre code {overflow-wrap:normal;word-break:normal;white-space:pre}
::selection {background:var(--pink);color:var(--ink)}
.wrap {width:100%;max-width:calc(var(--content-width) + var(--gutter)*2);margin-inline:auto;padding-inline:var(--gutter)}
.reading {max-width:calc(var(--reading-width) + var(--gutter)*2);margin-inline:auto;padding-inline:var(--gutter)}
section,[data-hero-visual],.decor-field {min-width:0;overflow-x:clip}
.grid {display:grid;gap:24px}
.grid>* , .panel>* , .footer-grid>* {min-width:0}
.grid-two {grid-template-columns:repeat(2,minmax(0,1fr))}
.section {padding-top:var(--space-7);padding-bottom:var(--space-7)}
.stack>*+* {margin-top:24px}
.nowrap {white-space:nowrap}
.muted {color:var(--text-muted)}
.on-panel .muted,.card .muted,.prose .muted {color:var(--ink-2)}
.page {position:relative;isolation:isolate;min-height:100vh;overflow-x:clip;background:radial-gradient(70% 60% at 90% -12%,var(--bg-lift) 0%,var(--clear) 62%),radial-gradient(58% 62% at -6% 112%,var(--bg-deep) 0%,var(--clear) 62%),var(--bg);color:var(--text)}
.page::before {content:"";position:absolute;inset:0;z-index:-1;background-image:var(--grain);background-size:240px 240px;opacity:.4;mix-blend-mode:soft-light;pointer-events:none}
.sr-only {position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.skip-link {position:fixed;top:8px;left:16px;z-index:100;transform:translateY(-160%);padding:12px 20px;border-radius:var(--r-pill);background:var(--surface);color:var(--ink)}
.skip-link:focus {transform:none}
.site-head {position:relative;z-index:50}
.head-shell {position:relative;min-height:var(--head-height);width:100%;max-width:min(100%,calc(var(--head-width) + var(--gutter)*2));padding-inline:var(--gutter);margin-inline:auto;display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand {display:inline-flex;align-items:center;gap:10px;flex-shrink:0;color:var(--text);text-decoration:none;font:800 18px/1 var(--font-display);letter-spacing:-.01em}
.brand img {width:32px;height:32px;flex-shrink:0}
.nav {min-width:0;margin-left:auto}
.nav ul {display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:30px}
.nav a {display:block;padding:8px 0;color:var(--text-muted);text-decoration:none;font:600 15px/1 var(--font-body);white-space:nowrap;transition:color var(--duration) ease}
.nav a:hover,.nav a[aria-current="page"] {color:var(--text)}
.nav a[aria-current="page"] {font-weight:800}
.head-tools {display:flex;align-items:center;gap:12px;flex-shrink:0}
.language-picker {position:relative}
.lang {appearance:none;display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:36px;padding:0 14px;border:1.5px solid var(--border);border-radius:var(--r-pill);background:var(--clear);color:var(--text);font:600 14px/1 var(--font-body);white-space:nowrap}
.lang:hover {background:var(--veil);color:var(--text)}
.language-menu {position:absolute;right:0;top:calc(100% + 12px);width:188px;padding:8px;margin:0;list-style:none;border:1px solid var(--line);border-radius:var(--r-card);background:var(--surface);color:var(--ink);box-shadow:var(--shadow-window);z-index:4}
.language-menu a {display:block;min-height:44px;padding:10px 14px;text-decoration:none;border-radius:var(--r-chip)}
.language-menu a:hover,.language-menu a[aria-current] {background:var(--surface-tint);color:var(--ink)}
.menu-toggle {display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:8px;border:1px solid var(--border);border-radius:var(--r-chip);background:var(--clear);color:var(--text)}
.menu-toggle svg {width:22px;height:22px;flex-shrink:0}
.mobile-drawer,.menu-veil {display:none}
.site-footer {padding-top:72px;padding-bottom:32px;color:var(--text-muted)}
.footer-grid {display:grid;grid-template-columns:1.3fr 1fr 1.3fr;gap:48px}
.footer-brand p {margin:20px 0 0;max-width:28em;font-size:14px}
.site-footer h2 {font-size:16px;color:var(--text);margin-bottom:16px}
.footer-links {list-style:none;margin:0;padding:0;display:grid;gap:8px}
.footer-links a {display:inline-block;padding-block:3px;text-decoration:none;font-size:14px}
.footer-links a:hover {color:var(--text);text-decoration:underline}
.footer-languages {display:flex;flex-wrap:wrap;gap:12px 24px;margin-top:36px}
.footer-languages a {padding-block:8px;font-size:14px}
.copyright {display:flex;flex-wrap:wrap;gap:12px 24px;align-items:center;margin-top:24px;padding-top:24px;border-top:1px solid var(--border);font-size:13px}
.copyright p {margin:0}
.copyright a {padding-block:6px}
.btn {display:inline-flex;align-items:center;justify-content:center;min-height:56px;gap:12px;border:0;border-radius:var(--r-pill);text-decoration:none;font:700 16px/1.2 var(--font-body);white-space:normal;text-align:center;transition:transform var(--duration) ease,background-color var(--duration) ease,border-color var(--duration) ease}
.btn-primary {padding:8px 22px 8px 8px;background:var(--ink);color:var(--text);box-shadow:var(--shadow-btn)}
.btn-primary:hover,.btn-primary.is-hover {background:var(--ink-hover);color:var(--text);transform:translateY(-1px)}
.btn-badge {display:grid;place-items:center;flex-shrink:0;width:40px;height:40px;border-radius:var(--r-chip);background:var(--grad);color:var(--ink)}
.btn-badge svg {width:20px;height:20px}
.btn-arrow {width:18px;height:18px;flex-shrink:0;color:var(--text-muted)}
.btn-ghost {padding:12px 26px;border:1.5px solid var(--line-strong);background:var(--surface);color:var(--ink)}
.btn-ghost:hover,.btn-ghost.is-hover {border-color:var(--ink);transform:translateY(-1px)}
.btn:active,.btn.is-active {transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"] {background:var(--surface-tint);color:var(--ink-3);box-shadow:none;cursor:not-allowed;transform:none}
.btn.is-focus {outline:2px solid var(--accent-readable);outline-offset:4px}
.cta {display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.card,.on-panel,.prose {background:var(--panel);color:var(--ink)}
.card {padding:32px;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-card)}
.card p:last-child {margin-bottom:0}
.card h3 a {text-decoration:none}
.card a:not(.btn) {text-decoration-thickness:1px}
.soft-panel {border-radius:var(--r-panel);padding:48px;background:radial-gradient(65% 80% at 0 0,var(--mist-pink),var(--clear)),var(--panel);color:var(--ink)}
.prose {min-width:0;padding:clamp(24px,5vw,64px);border-radius:var(--r-panel)}
.prose h2 {margin-top:2em;scroll-margin-top:24px}
.prose h3 {margin-top:1.6em}
.prose li+li {margin-top:8px}
.prose :not(pre)>code {padding:2px 5px;border-radius:var(--r-small);background:var(--surface-tint);color:var(--ink)}
.reveal {opacity:1;transform:none}
html.reveal-ready .reveal:not(.shown) {opacity:0;transform:translateY(18px)}
.reveal {transition:opacity .65s var(--ease),transform .65s var(--ease)}
.reveal.shown {opacity:1;transform:none}
.hero {padding:8px 24px 0}
.panel-wrap {filter:var(--shadow-panel)}
.panel {position:relative;height:clamp(700px,calc(100vh - 112px),800px);padding:64px 48px 0;border-radius:var(--r-panel);display:grid;grid-template-columns:minmax(0,1fr) 440px;grid-template-rows:minmax(0,1fr);column-gap:48px;color:var(--ink);background:radial-gradient(40% 52% at 0% 0%,var(--mist-pink) 0%,var(--clear) 72%),radial-gradient(38% 50% at 100% 0%,var(--mist-apricot) 0%,var(--clear) 72%),radial-gradient(36% 46% at 0% 100%,var(--mist-apricot) 0%,var(--clear) 72%),radial-gradient(40% 50% at 100% 100%,var(--mist-pink) 0%,var(--clear) 72%),var(--panel);-webkit-mask:var(--wave-top) 50% 0 / 160px 28px repeat-x,linear-gradient(var(--mask-solid),var(--mask-solid)) 0 50% / 100% calc(100% - 54px) no-repeat,var(--wave-bot) 50% 100% / 160px 28px repeat-x;mask:var(--wave-top) 50% 0 / 160px 28px repeat-x,linear-gradient(var(--mask-solid),var(--mask-solid)) 0 50% / 100% calc(100% - 54px) no-repeat,var(--wave-bot) 50% 100% / 160px 28px repeat-x}
.copy {grid-column:2;grid-row:1;align-self:center;margin-bottom:72px}
.chips {display:flex;flex-wrap:wrap;gap:8px;margin:0 0 22px;padding:0;list-style:none}
.chip {display:inline-flex;align-items:center;min-height:28px;max-width:100%;padding:4px 12px;border:1px solid var(--line-strong);border-radius:var(--r-pill);background:var(--surface);color:var(--ink-2);font:600 12.5px/1.4 var(--font-mono);overflow-wrap:anywhere}
.hero h1 {margin:0;font-size:var(--fs-h1);line-height:1.12;letter-spacing:-.015em;color:var(--ink)}
.h1-line {display:block}
.kw {background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:var(--clear)}
.lede {margin:20px 0 0;max-width:26em;font:400 17px/1.65 var(--font-body);color:var(--ink-2)}
.lede strong {color:var(--ink);font-weight:700}
.platforms {display:flex;flex-wrap:wrap;align-items:center;gap:20px;margin:30px 0 0;padding:0;list-style:none}
.platforms a {display:inline-flex;align-items:center;gap:8px;color:var(--ink-2);text-decoration:none;font:600 14px/1 var(--font-body)}
.plat-ico {display:grid;place-items:center;flex-shrink:0;width:30px;height:30px;border:1px solid var(--line-strong);border-radius:var(--r-small);background:var(--surface);color:var(--ink)}
.plat-ico svg {width:15px;height:15px;flex-shrink:0}
.platforms a:hover {color:var(--ink)}
.platforms a:hover .plat-ico {border-color:var(--ink)}
.panel a:focus-visible {outline:2.5px solid var(--accent-readable);outline-offset:3px}
@media (max-width:1280px) {
  .head-shell {gap:20px}
  .nav ul {gap:22px}
  html:not([lang="zh-CN"]):not([lang="zh-TW"]) .nav {display:none}
  html:not([lang="zh-CN"]):not([lang="zh-TW"]) .menu-toggle {display:inline-flex}
}
@media (max-width:1240px) {
  .panel {grid-template-columns:minmax(0,1fr) 400px;column-gap:36px;padding:64px 36px 0}
}
@media (max-width:1100px) {
  .nav {display:none}
  .head-tools {margin-left:auto}
  .menu-toggle {display:inline-flex}
}
@media (max-width:1280px) {
  .menu-veil:not([hidden]) {display:block;position:fixed;inset:var(--head-height) 0 0;z-index:1;border:0;background:var(--scrim);color:var(--text)}
  .mobile-drawer:not([hidden]) {display:block;position:fixed;inset:var(--head-height) 0 auto;z-index:2;max-height:calc(100dvh - var(--head-height));overflow-y:auto;overscroll-behavior:contain;padding:20px var(--gutter) 28px;background:var(--bg-deep);color:var(--text);box-shadow:var(--shadow-window)}
  .mobile-drawer ul {display:block;list-style:none;padding:0;margin:0}
  .mobile-drawer a {display:block;width:100%;min-height:44px;padding:12px 16px;text-decoration:none;line-height:1.5}
  .mobile-drawer a:hover,.mobile-drawer a[aria-current] {background:var(--bg);color:var(--text);border-radius:var(--r-chip)}
  .drawer-languages {padding-top:16px!important;margin-top:16px!important;border-top:1px solid var(--border)}
}
@media (max-width:1020px) {
  .panel {height:auto;grid-template-columns:minmax(0,1fr);grid-template-rows:auto auto;row-gap:48px;padding:76px 28px 0}
  .copy {grid-column:1;grid-row:1;margin:0}
  .footer-grid {grid-template-columns:1fr 1fr}
  .footer-brand {grid-column:1/-1}
}
@media (max-width:768px) {
  :root {--fs-h1:28px;--fs-h2:26px;--space-7:64px}
  .grid-two {grid-template-columns:minmax(0,1fr)}
  .hero {padding:8px 12px 0}
  .panel {padding:64px 20px 0;border-radius:var(--r-window)}
  .lede {font-size:15.5px}
  .btn {min-height:52px;font-size:15px}
  .head-shell {gap:12px}
  .head-tools {margin-left:auto;gap:8px}
  .brand {font-size:16px}
  .lang {padding-inline:10px}
  .soft-panel {padding:28px 20px}
  .card {padding:24px}
  .footer-grid {gap:32px;grid-template-columns:minmax(0,1fr)}
  .footer-brand {grid-column:auto}
  .site-footer {padding-bottom:32px}
}
@media (max-width:640px) {
  .tilt,[data-tilt] {transform:none!important}
  .chips {flex-direction:row;flex-wrap:wrap}
  .platforms {gap:12px 18px}
  .prose {padding:24px 20px;border-radius:var(--r-card)}
}
@media (prefers-reduced-motion:reduce) {
  html {scroll-behavior:auto}
  *,*::before,*::after {animation:none!important;transition:none!important}
  html.reveal-ready .reveal:not(.shown) {opacity:1;transform:none}
}