:root{--font-sans:"Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", system-ui, sans-serif;--font-mono:"Cascadia Code", "SFMono-Regular", Consolas, monospace;--app-font-scale:1;--font-size-caption:.75rem;--font-size-small:.875rem;--font-size-body:1rem;--font-size-lead:1.125rem;--font-size-title:clamp(1.875rem, 4vw, 3rem);--font-size-display:clamp(2.5rem, 4.7vw, 4.5rem);--line-height-tight:1.12;--line-height-heading:1.25;--line-height-body:1.7;--color-ink:#25202a;--color-muted:#6f6874;--color-faint:#6f6874;--color-paper:#fff;--color-section-tint:#f7f9ff;--color-panel:#fffdfd;--color-line:#ede6e9;--color-accent:#315fca;--color-accent-strong:#23499f;--color-accent-soft:#e9efff;--color-accent-contrast:#fff;--color-success:#2f9d73;--color-warning:#b87820;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;--space-6:32px;--space-7:48px;--space-8:64px;--space-9:96px;--space-10:128px;--content-wide:1180px;--content-narrow:920px;--radius-xs:6px;--radius-sm:10px;--radius-card:16px;--radius-large:24px;--radius-pill:999px;--shadow-soft:0 12px 36px #4a2b3012;--shadow-hover:0 20px 52px #4a2b3021;--shadow-floating:0 18px 60px #4a2b3029;--header-height:64px;--motion-fast:.16s;--motion-base:.22s;--ease-standard:cubic-bezier(.2, .8, .2, 1);--hero-art-hue:0deg;--hero-art-saturation:.84;--hero-art-brightness:1.05;--hero-surface:#f2f7ff;--hero-overlay:color-mix(in srgb, var(--hero-surface) 58%, transparent);--hero-ink:#29262d;--hero-muted:#6d6670;--hero-glass:#ffffff9e;--hero-code-plain:#302c33;--hero-code-keyword:#7628b5;--hero-code-variable:#15762f;--hero-code-assignment:#d34552;--hero-code-operator:var(--hero-ink);--hero-code-value:color-mix(in srgb, var(--color-success) 65%, var(--color-ink));--hero-cloud-opacity:.92}html[data-accent=coral]{--color-accent:#cf3b47;--color-accent-strong:#b92e3a;--color-accent-soft:#ffe7e7;--color-section-tint:#fff8fa;--hero-art-hue:136deg;--hero-art-saturation:.82;--hero-surface:#fff5f7}html[data-accent=blue]{--color-accent:#315fca;--color-accent-strong:#23499f;--color-accent-soft:#e9efff;--color-section-tint:#f7f9ff;--hero-art-hue:0deg;--hero-art-saturation:.84;--hero-surface:#f2f7ff}html[data-accent=orange]{--color-accent:#a84f08;--color-accent-strong:#843c00;--color-accent-soft:#fff0e0;--color-section-tint:#fffaf4;--hero-art-hue:174deg;--hero-art-saturation:.9;--hero-surface:#fff8f0}html[data-accent=green]{--color-accent:#176b4c;--color-accent-strong:#10543b;--color-accent-soft:#e3f7ef;--color-section-tint:#f5fcf9;--hero-art-hue:-68deg;--hero-art-saturation:.68;--hero-surface:#f2fbf7}html[data-accent=rose]{--color-accent:#b32361;--color-accent-strong:#8e184b;--color-accent-soft:#fde8f0;--color-section-tint:#fff7fa;--hero-art-hue:116deg;--hero-art-saturation:.82;--hero-surface:#fff4f8}html[data-accent=purple]{--color-accent:#6e45be;--color-accent-strong:#56349a;--color-accent-soft:#f0eaff;--color-section-tint:#faf8ff;--hero-art-hue:58deg;--hero-art-saturation:.76;--hero-surface:#f8f5ff}html[data-accent=yellow]{--color-accent:#876300;--color-accent-strong:#684c00;--color-accent-soft:#fff3c9;--color-section-tint:#fffbed;--hero-art-hue:194deg;--hero-art-saturation:.72;--hero-surface:#fffbed}html[data-appearance=dark]{--color-ink:#f4eef5;--color-muted:#bfb4c1;--color-faint:#958b97;--color-paper:#19161b;--color-section-tint:#211b1e;--color-panel:#231e24;--color-line:#393139;--color-accent-soft:color-mix(in srgb, var(--color-accent) 25%, var(--color-paper));--shadow-soft:0 12px 36px #00000042;--shadow-hover:0 18px 46px #00000057;--shadow-floating:0 24px 70px #00000061;--hero-art-brightness:.52;--hero-surface:#17161b;--hero-overlay:color-mix(in srgb, var(--hero-surface) 28%, transparent);--hero-ink:#f7f2f6;--hero-muted:#c8bdc7;--hero-glass:#19161cb3;--hero-code-plain:#f0eaf1;--hero-code-keyword:#c084fc;--hero-code-variable:#4ade80;--hero-code-assignment:#fb7185;--hero-code-operator:#f0eaf1;--hero-cloud-opacity:.2}@media (prefers-color-scheme:dark){html[data-appearance=auto]{--color-ink:#f4eef5;--color-muted:#bfb4c1;--color-faint:#958b97;--color-paper:#19161b;--color-section-tint:#211b1e;--color-panel:#231e24;--color-line:#393139;--color-accent-soft:color-mix(in srgb, var(--color-accent) 25%, var(--color-paper));--shadow-soft:0 12px 36px #00000042;--shadow-hover:0 18px 46px #00000057;--shadow-floating:0 24px 70px #00000061;--hero-art-brightness:.52;--hero-surface:#17161b;--hero-overlay:color-mix(in srgb, var(--hero-surface) 28%, transparent);--hero-ink:#f7f2f6;--hero-muted:#c8bdc7;--hero-glass:#19161cb3;--hero-code-plain:#f0eaf1;--hero-code-keyword:#c084fc;--hero-code-variable:#4ade80;--hero-code-assignment:#fb7185;--hero-code-operator:#f0eaf1;--hero-cloud-opacity:.2}}@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,::backdrop,:after,:before{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-border-style:solid;--tw-outline-style:solid;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial;--tw-backdrop-blur:initial;--tw-backdrop-brightness:initial;--tw-backdrop-contrast:initial;--tw-backdrop-grayscale:initial;--tw-backdrop-hue-rotate:initial;--tw-backdrop-invert:initial;--tw-backdrop-opacity:initial;--tw-backdrop-saturate:initial;--tw-backdrop-sepia:initial;--tw-ease:initial}}}@layer theme{:host,:root{--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;--spacing:.25rem;--radius-xs:.125rem;--radius-sm:.25rem;--ease-in-out:cubic-bezier(.4, 0, .2, 1);--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4, 0, .2, 1);--default-font-family:var(--font-sans);--default-mono-font-family:var(--font-mono)}}@layer base{*,::backdrop,:after,:before{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}:host,html{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","Noto Sans",Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,pre,samp{font-family:var(--default-mono-font-family,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring:where(:not(iframe)){outline:auto}progress{vertical-align:baseline}summary{display:list-item}menu,ol,ul{list-style:none}audio,canvas,embed,iframe,img,object,svg,video{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,optgroup,select,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab,red,red)){::placeholder{color:color-mix(in oklab,currentcolor 50%,transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.fixed{position:fixed}.container{width:100%}@media (width>=40rem){.container{max-width:40rem}}@media (width>=48rem){.container{max-width:48rem}}@media (width>=64rem){.container{max-width:64rem}}@media (width>=80rem){.container{max-width:80rem}}@media (width>=96rem){.container{max-width:96rem}}.m-5{margin:calc(var(--spacing)*5)}.block{display:block}.contents{display:contents}.flex{display:flex}.grid{display:grid}.hidden{display:none}.inline{display:inline}.table{display:table}.flex-shrink{flex-shrink:1}.border-collapse{border-collapse:collapse}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.resize{resize:both}.flex-wrap{flex-wrap:wrap}.border{border-style:var(--tw-border-style);border-width:1px}.mask-repeat{-webkit-mask-repeat:repeat;mask-repeat:repeat}.text-wrap{text-wrap:wrap}.outline{outline-style:var(--tw-outline-style);outline-width:1px}.filter{filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.backdrop-filter{-webkit-backdrop-filter:var(--tw-backdrop-blur,) var(--tw-backdrop-brightness,) var(--tw-backdrop-contrast,) var(--tw-backdrop-grayscale,) var(--tw-backdrop-hue-rotate,) var(--tw-backdrop-invert,) var(--tw-backdrop-opacity,) var(--tw-backdrop-saturate,) var(--tw-backdrop-sepia,);backdrop-filter:var(--tw-backdrop-blur,) var(--tw-backdrop-brightness,) var(--tw-backdrop-contrast,) var(--tw-backdrop-grayscale,) var(--tw-backdrop-hue-rotate,) var(--tw-backdrop-invert,) var(--tw-backdrop-opacity,) var(--tw-backdrop-saturate,) var(--tw-backdrop-sepia,)}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}.ease-in-out{--tw-ease:var(--ease-in-out);transition-timing-function:var(--ease-in-out)}}*,:after,:before{box-sizing:border-box}html{scroll-behavior:smooth;font-size:calc(16px*var(--app-font-scale))}body,html{background:var(--color-paper)}body{min-width:320px;color:var(--color-ink);font-family:var(--font-sans);line-height:var(--line-height-body);text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;margin:0}button,input,select{color:inherit;font:inherit}a,button{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}img,svg{max-width:100%;display:block}button{cursor:pointer}:focus-visible{outline:3px solid var(--color-accent)}@supports (color:color-mix(in lab,red,red)){:focus-visible{outline:3px solid color-mix(in srgb,var(--color-accent) 64%,transparent)}}:focus-visible{outline-offset:3px}.page-container{width:min(calc(100% - 40px),var(--content-wide));margin-inline:auto}.section-pad{padding-block:clamp(var(--space-8),9vw,var(--space-10))}.section-title{font-size:var(--font-size-title);letter-spacing:-.04em;font-weight:800;line-height:var(--line-height-heading);margin:0 0 14px}.section-lead{max-width:680px;color:var(--color-muted);font-size:var(--font-size-body);margin:0}.pill-button{border:1px solid var(--color-line);border-radius:var(--radius-pill);background:var(--color-paper);min-height:44px;transition:transform var(--motion-fast) var(--ease-standard),border-color var(--motion-fast) ease,box-shadow var(--motion-fast) ease;justify-content:center;align-items:center;gap:8px;padding:0 20px;display:inline-flex}.pill-button:hover{border-color:var(--color-accent);box-shadow:var(--shadow-soft);transform:translateY(-2px)}.pill-button--primary{border-color:var(--color-accent);color:#fff;background:var(--color-accent)}.card-surface{border:1px solid var(--color-line);border-radius:var(--radius-card);background:var(--color-panel);box-shadow:var(--shadow-soft)}.sr-only{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}@media (width<=640px){.page-container{width:min(calc(100% - 28px),var(--content-wide))}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:after,:before{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-backdrop-blur{syntax:"*";inherits:false}@property --tw-backdrop-brightness{syntax:"*";inherits:false}@property --tw-backdrop-contrast{syntax:"*";inherits:false}@property --tw-backdrop-grayscale{syntax:"*";inherits:false}@property --tw-backdrop-hue-rotate{syntax:"*";inherits:false}@property --tw-backdrop-invert{syntax:"*";inherits:false}@property --tw-backdrop-opacity{syntax:"*";inherits:false}@property --tw-backdrop-saturate{syntax:"*";inherits:false}@property --tw-backdrop-sepia{syntax:"*";inherits:false}@property --tw-ease{syntax:"*";inherits:false}html[data-font-scale=small]{--app-font-scale:.9}html[data-font-scale=normal]{--app-font-scale:1}html[data-font-scale=large]{--app-font-scale:1.1}html[data-font-scale=xlarge]{--app-font-scale:1.2}html[data-font-scale=xxlarge]{--app-font-scale:1.3}html[data-motion=reduced] *,html[data-motion=reduced] :after,html[data-motion=reduced] :before{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}html[data-motion=reduced]{scroll-behavior:auto!important}