:root{--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-7: 32px;--space-8: 40px;--space-9: 48px;--space-10: 64px;--space-11: 80px;--space-12: 96px;--fs-xs: .75rem;--fs-sm: .875rem;--fs-body: .9375rem;--fs-base: 1rem;--fs-md: 1.0625rem;--fs-lg: 1.25rem;--fs-xl: 1.5rem;--fs-2xl: 2.25rem;--bg: #fdfcfc;--bg-glow-1: rgba(206, 128, 78, .09);--bg-glow-2: rgba(120, 100, 88, .04);--surface: #ffffff;--surface-2: #f6f4f2;--surface-3: #eeebe7;--border: rgba(17, 14, 12, .09);--border-strong: rgba(17, 14, 12, .16);--text: #0a0a0a;--text-muted: #777169;--text-dim: #9c968d;--accent: #0a0a0a;--accent-hover: #2f2c28;--accent-strong: #0a0a0a;--accent-quiet: rgba(17, 14, 12, .05);--accent-border: rgba(17, 14, 12, .14);--on-accent: #fdfcfc;--ok: #3f7d55;--ok-quiet: rgba(63, 125, 85, .1);--ok-border: rgba(63, 125, 85, .32);--warn: #92621f;--warn-quiet: rgba(146, 98, 31, .1);--info: #4a6f8a;--info-quiet: rgba(74, 111, 138, .1);--code-bg: #141312;--code-border: rgba(253, 252, 252, .1);--code-text: #e9e6e2;--code-comment: #8d877f;--shadow-sm: 0 1px 2px rgba(17, 14, 12, .06);--shadow-md: 0 2px 6px rgba(17, 14, 12, .06), 0 16px 32px -24px rgba(17, 14, 12, .2);--shadow-lg: 0 8px 16px -8px rgba(17, 14, 12, .1), 0 40px 80px -40px rgba(17, 14, 12, .28);--card-shadow: none;--input-shadow: none;--radius-xs: 8px;--radius-sm: 10px;--radius: 16px;--radius-lg: 24px;--radius-pill: 999px;--container: 1200px;--nav-height: 64px;--nav-bg: rgba(253, 252, 252, .82);--sans: "Inter", system-ui, -apple-system, "Segoe UI", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;--mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", "Courier New", monospace;color-scheme:light}:root[data-theme=dark]{--bg: #0c0b0a;--bg-glow-1: rgba(226, 138, 84, .07);--bg-glow-2: rgba(253, 252, 252, .025);--surface: #141312;--surface-2: #1c1a18;--surface-3: #262321;--border: rgba(253, 252, 252, .1);--border-strong: rgba(253, 252, 252, .2);--text: #fdfcfc;--text-muted: #a8a29a;--text-dim: #7e7871;--accent: #fdfcfc;--accent-hover: #e8e4df;--accent-strong: #ffffff;--accent-quiet: rgba(253, 252, 252, .07);--accent-border: rgba(253, 252, 252, .18);--on-accent: #0c0b0a;--ok: #86bb9c;--ok-quiet: rgba(134, 187, 156, .14);--ok-border: rgba(134, 187, 156, .4);--warn: #d6a967;--warn-quiet: rgba(214, 169, 103, .14);--info: #93b2c9;--info-quiet: rgba(147, 178, 201, .14);--code-bg: #0a0a09;--code-border: rgba(253, 252, 252, .12);--code-text: #e9e6e2;--code-comment: #8d877f;--nav-bg: rgba(12, 11, 10, .78);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);--shadow-md: 0 2px 6px rgba(0, 0, 0, .45), 0 16px 32px -24px rgba(0, 0, 0, .8);--shadow-lg: 0 8px 16px -8px rgba(0, 0, 0, .5), 0 40px 80px -40px rgba(0, 0, 0, .9);--card-shadow: none;--input-shadow: none;color-scheme:dark}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{margin:0;min-height:100%;background-color:var(--bg);background-image:radial-gradient(1200px 520px at 50% -18%,var(--bg-glow-1),transparent 68%),radial-gradient(900px 420px at 100% 0%,var(--bg-glow-2),transparent 60%);background-repeat:no-repeat;color:var(--text);font-family:var(--sans);font-size:var(--fs-base);line-height:1.55;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}h1,h2,h3,h4{margin:0;line-height:1.2;letter-spacing:-.02em;font-weight:500}h1{font-size:clamp(2.5rem,1.95rem + 2.4vw,3.25rem);font-weight:300;line-height:1.08;letter-spacing:-.028em}h2{font-size:clamp(1.75rem,1.45rem + 1.2vw,2.25rem);font-weight:300;line-height:1.16;letter-spacing:-.022em}h3{font-size:var(--fs-md);font-weight:500;line-height:1.4;letter-spacing:-.01em}h4{font-size:var(--fs-base);font-weight:500;line-height:1.4;letter-spacing:-.005em}p{margin:0}ul,ol{margin:0;padding:0;list-style:none}a{color:var(--accent);text-decoration:none;text-underline-offset:2px}a:hover{text-decoration:underline}img,svg{max-width:100%}button{font:inherit;color:inherit}:focus-visible{outline:2px solid var(--accent-strong);outline-offset:2px;border-radius:var(--radius-xs)}.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:32px}.section{padding-block:clamp(72px,8vw,128px);border-top:1px solid var(--border);scroll-margin-top:calc(var(--nav-height) + 12px)}.section--plain{border-top-color:transparent}.section__head{max-width:720px;margin-bottom:var(--space-9)}.section__title{margin-bottom:var(--space-3)}.section__subtitle{max-width:60ch;color:var(--text-muted);font-size:var(--fs-md);line-height:1.6}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--card-shadow)}.card--pad{padding:var(--space-6)}.btn{--btn-bg: var(--surface);--btn-fg: var(--text);--btn-border: var(--border-strong);display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border:1px solid var(--btn-border);border-radius:var(--radius-pill);background:var(--btn-bg);color:var(--btn-fg);font-size:var(--fs-body);font-weight:500;line-height:1.35;white-space:nowrap;cursor:pointer;transition:background-color .14s ease,border-color .14s ease,color .14s ease}.btn:hover{text-decoration:none}.btn--primary{--btn-bg: var(--accent);--btn-fg: var(--on-accent);--btn-border: transparent}.btn--primary:hover{--btn-bg: var(--accent-hover)}.btn--secondary{--btn-bg: var(--surface);--btn-fg: var(--text)}.btn--secondary:hover{--btn-bg: var(--surface-2);--btn-border: var(--border-strong)}.btn[aria-disabled=true],.btn:disabled{--btn-bg: var(--surface-2);--btn-fg: var(--text-dim);--btn-border: var(--border);cursor:not-allowed}.btn[aria-disabled=true]:hover,.btn:disabled:hover{--btn-bg: var(--surface-2)}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;padding:0;border:1px solid transparent;border-radius:var(--radius-pill);background:transparent;color:var(--text-muted);cursor:pointer;transition:background-color .14s ease,border-color .14s ease,color .14s ease}.icon-btn:hover{background:var(--surface-2);border-color:var(--border);color:var(--text)}.badge{display:inline-flex;align-items:center;gap:6px;padding:3px 10px;border:1px solid var(--border);border-radius:var(--radius-pill);background:var(--surface-2);color:var(--text-muted);font-size:var(--fs-xs);font-weight:500;letter-spacing:.01em;white-space:nowrap}.badge--ok{border-color:transparent;background:var(--ok-quiet);color:var(--ok)}.badge--warn{border-color:transparent;background:var(--warn-quiet);color:var(--warn)}.badge--info{border-color:transparent;background:var(--info-quiet);color:var(--info)}.badge--muted{color:var(--text-dim)}.mono{font-family:var(--mono);font-size:.86rem}.code-block{margin:0;padding:18px 20px;border:1px solid var(--code-border);border-radius:var(--radius-sm);background:var(--code-bg);color:var(--code-text);font-family:var(--mono);font-size:.8125rem;line-height:1.75;overflow-x:auto;-moz-tab-size:4;tab-size:4}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.skip-link{position:absolute;top:-60px;left:16px;z-index:60;padding:10px 16px;border-radius:var(--radius-pill);background:var(--surface);border:1px solid var(--border-strong);color:var(--text);font-weight:500;transition:top .12s ease}.skip-link:focus{top:12px;text-decoration:none}@media (max-width: 640px){.container{padding-inline:20px}}@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}}.logo{display:inline-flex;align-items:center;gap:10px;color:var(--text)}.logo__mark{flex:none;display:block}.logo__mark-bg{fill:var(--text)}.logo__mark-glyph{fill:none;stroke:var(--bg)}.logo__mark-dot{fill:var(--bg)}.logo__text{display:flex;flex-direction:column;line-height:1.15}.logo__wordmark{font-size:var(--fs-md);font-weight:600;letter-spacing:.01em}.logo__code{color:var(--text-dim);font-size:.625rem;letter-spacing:.12em;text-transform:uppercase}@media (max-width: 420px){.logo__code{display:none}}.nav{position:sticky;top:0;z-index:40;background:var(--nav-bg);border-bottom:1px solid var(--border);backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%)}.nav__inner{display:flex;align-items:center;gap:var(--space-7);min-height:var(--nav-height)}.nav__brand{color:inherit;flex:none}.nav__brand:hover{text-decoration:none}.nav__menu{flex:1 1 auto;min-width:0}.nav__links{display:flex;align-items:center;gap:var(--space-1);flex-wrap:wrap}.nav__links a{display:inline-block;padding:6px 10px;border-radius:var(--radius-xs);color:var(--text-muted);font-size:var(--fs-body);font-weight:400;transition:color .14s ease}.nav__links a:hover{color:var(--text);text-decoration:none}.nav__links a[aria-current=page]{color:var(--text)}.nav__actions{display:flex;align-items:center;gap:var(--space-2);flex:none;margin-left:auto}.nav__account{display:inline-flex;align-items:center;gap:8px;max-width:180px;padding:8px 16px;border:1px solid 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var(--space-3);color:var(--text-dim);font-size:.75rem;font-weight:500;letter-spacing:.08em;text-transform:uppercase}.footer__links ul{display:flex;flex-direction:column;gap:8px}.footer__links a{color:var(--text-muted);font-size:var(--fs-body)}.footer__links a:hover{color:var(--text)}.footer__notice-text{color:var(--text-muted);font-size:var(--fs-body)}.footer__records{display:flex;flex-direction:column;gap:6px}.footer__records a{display:inline-flex;align-items:center;gap:6px;color:var(--text-muted);font-size:var(--fs-body);line-height:1.5}.footer__records a:hover{color:var(--text)}.footer__records img{flex:none;border-radius:2px}.footer__bottom{display:flex;align-items:center;justify-content:space-between;gap:var(--space-3) var(--space-5);flex-wrap:wrap;padding-block:var(--space-5) var(--space-8);border-top:1px solid var(--border)}.footer__legal{color:var(--text-dim);font-size:var(--fs-xs);line-height:1.6}.footer__end{display:flex;align-items:center;flex-wrap:wrap;gap:var(--space-5)}.footer__lang{position:relative;display:inline-flex;align-items:center;gap:8px;height:36px;padding:0 32px 0 12px;border:1px solid var(--border-strong);border-radius:var(--radius-pill);color:var(--text-muted);transition:border-color .14s ease,color .14s ease;cursor:pointer}.footer__lang:hover{border-color:var(--text-dim);color:var(--text)}.footer__lang:focus-within{border-color:var(--text)}.footer__lang:after{content:"";position:absolute;right:15px;top:50%;width:7px;height:7px;margin-top:-5px;border-right:1.4px solid currentColor;border-bottom:1.4px solid currentColor;transform:rotate(45deg);pointer-events:none}.footer__lang-icon{flex:none}.footer__lang-select{-moz-appearance:none;appearance:none;-webkit-appearance:none;padding:0;border:0;background:transparent;color:var(--text);font:inherit;font-size:var(--fs-sm);cursor:pointer}.footer__lang-select:focus-visible{outline:none}.footer__top{color:var(--text-muted);font-size:var(--fs-sm);font-weight:500}.footer__top:hover{color:var(--text)}@media (max-width: 640px){.footer__inner{grid-template-columns:minmax(0,1fr);gap:var(--space-6)}}