@media (width<=639px){.site-header__waitlist[data-astro-cid-fzpbxy5g]{padding:.75rem var(--page-gutter) calc(.75rem + env(safe-area-inset-bottom,0px));border-top:1px solid var(--color-line);background:var(--color-paper);position:fixed;inset:auto 0 0}.site-header__waitlist[data-astro-cid-fzpbxy5g] .button[data-astro-cid-fzpbxy5g]{width:100%}body:has(.site-header--coupon){padding-bottom:calc(5rem + env(safe-area-inset-bottom,0px))}html:has(.site-header--coupon){scroll-padding-bottom:calc(6rem + env(safe-area-inset-bottom,0px))}}:root{--color-ink:#161d14;--color-paper:#f8f9f6;--color-surface:#fff;--color-surface-muted:#f1f3ed;--color-text-muted:#6a7168;--color-line:#dde2d8;--color-action:#b7ec27;--color-action-hover:#a6db18;--color-focus:#2f6feb;--color-success:#247a4a;--color-warning:#8a5a00;--color-on-ink-muted:#c5cdc0;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-6:1.5rem;--space-8:2rem;--space-12:3rem;--space-16:4rem;--space-24:6rem;--space-32:8rem;--radius-control:.375rem;--radius-card:.75rem;--radius-panel:1.25rem;--radius-shell:2rem;--shadow-raised:0 12px 32px #161d1414;--focus-ring:0 0 0 3px #2f6feb47;--font-sans:Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-cjk:"PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;--page-gutter:1.25rem;--container:75rem;--header-height:4.75rem;--prose-width:46rem;--toc-width:16.25rem;--ease-standard:cubic-bezier(.2, .8, .2, 1);--duration-hover:.14s;--duration-panel:.2s}@media (width>=640px){:root{--page-gutter:2rem}}@media (width>=900px){:root{--page-gutter:3rem;--header-height:5rem}}@media (width>=1200px){:root{--page-gutter:4rem}}*,:before,:after{box-sizing:border-box}html{scroll-padding-top:calc(var(--header-height) + var(--space-4));overflow-x:clip}body{min-width:0;color:var(--color-ink);background:var(--color-paper);font-family:var(--font-sans);font-synthesis:none;text-rendering:optimizelegibility;margin:0;font-size:1rem;font-weight:450;line-height:1.7;overflow-x:clip}img,svg{max-width:100%;height:auto}button,input,select,textarea{font:inherit}h1,h2,h3,h4,p,figure{margin-top:0}h1,h2,h3{letter-spacing:-.03em;text-wrap:balance}h1{margin-bottom:var(--space-6);font-size:clamp(2.25rem,4.5vw,4rem);font-weight:680;line-height:1.06}h2{margin-bottom:var(--space-4);font-size:clamp(1.75rem,3vw,3rem);font-weight:650;line-height:1.12}h3{margin-bottom:var(--space-3);letter-spacing:-.02em;font-size:1.35rem;font-weight:650;line-height:1.25}p{margin-bottom:1.15em}a{color:inherit;text-decoration:none}:focus{outline:none}:focus-visible{outline:3px solid var(--color-focus);outline-offset:3px;box-shadow:var(--focus-ring)}.visually-hidden{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.skip-link{left:var(--space-4);z-index:200;padding:var(--space-3) var(--space-4);border-radius:var(--radius-control);background:var(--color-action);color:var(--color-ink);font-weight:700;position:absolute;top:-100%}.skip-link:focus{top:var(--space-4)}.page-frame{background:var(--color-paper);flex-direction:column;min-height:100vh;display:flex}.page-frame>main{flex:1}.shell{width:min(var(--container), calc(100% - 2 * var(--page-gutter)));margin-inline:auto}.site-header{z-index:20;min-height:var(--header-height);border-bottom:1px solid var(--color-line);background:var(--color-paper);position:sticky;top:0}.site-header__inner{min-height:var(--header-height);align-items:center;gap:var(--space-4);grid-template-columns:1fr auto;display:grid}.brand-mark{align-items:center;gap:var(--space-3);letter-spacing:-.04em;min-height:44px;font-size:1.05rem;font-weight:750;display:inline-flex}.brand-mark__badge{border-radius:var(--radius-control);background:0 0;justify-content:center;align-items:center;width:32px;height:32px;display:inline-flex;overflow:hidden}.brand-mark__badge img{width:32px;height:32px;display:block}.brand-mark__name{white-space:nowrap}.brand-mark--inverted{color:var(--color-paper)}.brand-mark--inverted .brand-mark__badge{background:0 0}.product-logo{width:min(100%,5rem);height:auto;display:block}.product-logo--compact{width:min(100%,3rem)}.site-nav{align-items:center;gap:var(--space-8);font-size:.95rem;font-weight:600;display:none}.site-nav a{padding-block:var(--space-2);color:var(--color-text-muted)}.site-nav a:hover,.site-nav a.active{color:var(--color-ink)}.site-nav a.active{box-shadow:inset 0 -2px 0 var(--color-action)}.site-header__actions{justify-content:flex-end;align-items:center;gap:var(--space-3);display:flex}.locale-switch{color:var(--color-ink);flex-shrink:0;position:relative}.locale-switch__summary{border:1px solid var(--color-line);border-radius:var(--radius-control);background:var(--color-surface);min-height:44px;color:var(--color-ink);white-space:nowrap;cursor:pointer;flex-flow:row;align-items:center;gap:.35rem;padding:0 .75rem;font-size:.88rem;font-weight:650;list-style:none;display:flex}.locale-switch__summary::-webkit-details-marker{display:none}.locale-switch__summary::marker{content:""}.locale-switch__chevron{color:var(--color-text-muted);transition:transform var(--duration-hover) var(--ease-standard);flex-shrink:0}.locale-switch[open] .locale-switch__chevron{transform:rotate(180deg)}.locale-switch__menu{top:calc(100% + var(--space-1));z-index:30;width:max-content;min-width:11rem;padding:var(--space-1);border:1px solid var(--color-line);border-radius:var(--radius-control);background:var(--color-surface);box-shadow:var(--shadow-raised);margin:0;list-style:none;position:absolute;right:0}.site-footer .locale-switch__menu{top:auto;bottom:calc(100% + var(--space-1))}.locale-switch__option{border-radius:calc(var(--radius-control) - 2px);min-height:44px;color:var(--color-ink);white-space:nowrap;align-items:center;padding:0 .75rem;font-size:.88rem;font-weight:650;text-decoration:none;display:flex}a.locale-switch__option:hover,a.locale-switch__option:focus-visible{background:var(--color-surface-muted);text-decoration:none}.locale-switch__option[aria-current=true]{background:var(--color-surface-muted)}.locale-switch [lang=zh]{font-family:var(--font-cjk)}.button{border:1px solid var(--color-ink);border-radius:var(--radius-control);background:var(--color-action);min-height:48px;color:var(--color-ink);cursor:pointer;transition:background var(--duration-hover) var(--ease-standard), transform var(--duration-hover) var(--ease-standard);justify-content:center;align-items:center;padding:0 1.15rem;font-size:.95rem;font-weight:700;line-height:1.2;display:inline-flex}.button:hover{background:var(--color-action-hover);color:var(--color-ink);transform:translateY(-1px)}.button:active{transform:none}.button--secondary{background:var(--color-surface);border-color:var(--color-ink)}.button--secondary:hover{background:var(--color-surface-muted)}.button--text{background:0 0;border:0;min-height:44px;padding-inline:0;font-weight:650}.button--text:hover{text-underline-offset:.2em;background:0 0;text-decoration:underline;transform:none}.button:disabled,.button[aria-disabled=true]{background:var(--color-surface-muted);border-color:var(--color-line);color:var(--color-text-muted);cursor:not-allowed;transform:none}.menu-toggle,.site-header__cta{flex-shrink:0}.site-header__cta{min-height:44px;padding-inline:.85rem;font-size:.88rem}.cta-label--full{display:none}.cta-label--short{display:inline}.menu-toggle{border:1px solid var(--color-ink);border-radius:var(--radius-control);background:var(--color-surface);width:44px;height:44px;color:var(--color-ink);cursor:pointer;justify-content:center;align-items:center;display:inline-flex}.menu-toggle__close,.site-header.is-open .menu-toggle__open{display:none}.site-header.is-open .menu-toggle__close{display:block}.site-footer{margin-top:var(--space-16);padding-block:var(--space-12) var(--space-8);background:var(--color-ink);color:var(--color-paper)}.site-footer a:hover{text-underline-offset:.18em;text-decoration:underline}.site-footer__inner{gap:var(--space-8);display:grid}.site-footer__brand p,.site-footer__legal{max-width:36rem;color:var(--color-on-ink-muted);margin:0;font-size:.95rem;line-height:1.6}.site-footer__legal{font-size:.875rem}.site-footer__nav{align-items:center;gap:var(--space-4) var(--space-6);flex-wrap:wrap;font-weight:650;display:flex}.site-footer__nav nav{gap:var(--space-4) var(--space-6);flex-wrap:wrap;display:flex}.site-footer .locale-switch a{color:var(--color-ink)}.kicker{align-items:center;gap:var(--space-3);margin-bottom:var(--space-4);color:var(--color-text-muted);flex-wrap:wrap;font-size:.875rem;font-weight:650;display:flex}.eyebrow{margin-bottom:var(--space-4);color:var(--color-text-muted);letter-spacing:.08em;text-transform:uppercase;font-size:.78rem;font-weight:750;line-height:1.3}.status-badge{border:1px solid var(--color-line);background:var(--color-surface-muted);min-height:1.75rem;color:var(--color-ink);letter-spacing:.04em;border-radius:999px;align-items:center;padding:0 .6rem;font-size:.75rem;font-weight:750;line-height:1.3;display:inline-flex}.status-badge--available{border-color:var(--color-ink);background:var(--color-action)}.status-badge--prelaunch,.status-badge--researching,.status-badge--planned{background:var(--color-surface)}.hero{padding:var(--space-16) 0 var(--space-12)}.hero__grid{gap:var(--space-12);align-items:center;display:grid}.hero__lede,.page-intro p{max-width:40rem;color:var(--color-text-muted);font-size:1.15rem;font-weight:450;line-height:1.65}.hero h1,.page-intro h1{max-width:18ch}.actions{gap:var(--space-3);margin-top:var(--space-8);flex-wrap:wrap;display:flex}.sketch{color:var(--color-ink);margin:0}.sketch svg{width:100%;height:auto;display:block}.sketch text{font-family:var(--font-sans)}.section{padding:var(--space-16) 0}.section--muted{background:var(--color-surface-muted)}.section-heading{gap:var(--space-4);margin-bottom:var(--space-8);display:grid}.section-heading p{max-width:36rem;color:var(--color-text-muted);margin:0}.catalog-grid{gap:var(--space-6);grid-template-columns:repeat(auto-fill,minmax(18rem,1fr));display:grid}.feature-card,.tool-card,.product-card,.empty-state,.panel,.calculator-card{padding:var(--space-6);border:1px solid var(--color-line);border-radius:var(--radius-card);background:var(--color-surface)}.calculator-card,.panel{border-radius:var(--radius-panel)}.feature-card p,.tool-card p,.product-card p,.empty-state{color:var(--color-text-muted);margin-bottom:0;line-height:1.65}.feature-card h2,.tool-card h2,.product-card h2,.feature-card h3,.tool-card h3,.product-card h3{margin:var(--space-4) 0 var(--space-3)}.card-link{font-weight:700}.card-link:hover,.card-link:focus-visible{text-underline-offset:.18em;text-decoration:underline}.tool-card__meta{gap:var(--space-3);margin:0;display:grid}.tool-card__meta div{gap:var(--space-1);display:grid}.tool-card__meta dt{letter-spacing:.04em;text-transform:uppercase;font-size:.75rem;font-weight:750}.tool-card__meta dd{color:var(--color-text-muted);margin:0;line-height:1.5}.product-page .product-card{max-width:40rem}.page-intro,.product-page,.tool-page,.blog-index,.blog-post-shell{padding:var(--space-12) 0 var(--space-8)}.breadcrumb{margin-bottom:var(--space-8);color:var(--color-text-muted);font-size:.875rem;font-weight:600}.breadcrumb__list{gap:var(--space-2);flex-wrap:wrap;margin:0;padding:0;list-style:none;display:flex}.breadcrumb__item:not(:last-child):after{content:"/";margin-left:var(--space-2);color:var(--color-line)}.breadcrumb a:hover{color:var(--color-ink);text-underline-offset:.16em;text-decoration:underline}.product-feature,.trust-note{gap:var(--space-8);margin-top:var(--space-12);display:grid}.product-copy h2{max-width:18ch}.product-copy p,.trust-note p,.tool-note p{color:var(--color-text-muted)}.product-copy a,.trust-note a,.prose a,.tool-note a{text-underline-offset:.16em;text-decoration:underline}.split-list{gap:var(--space-4);margin:0;padding:0;list-style:none;display:grid}.split-list li{padding:var(--space-4);border:1px solid var(--color-line);border-radius:var(--radius-card);background:var(--color-surface)}.faq-list{gap:var(--space-4);display:grid}.faq-list details{padding:var(--space-4);border:1px solid var(--color-line);border-radius:var(--radius-card);background:var(--color-surface)}.faq-list summary{cursor:pointer;font-weight:700}.faq-list p{margin:var(--space-3) 0 0;color:var(--color-text-muted)}.tool-workspace{gap:var(--space-6);align-items:start;display:grid}.form-grid{gap:var(--space-4);display:grid}.field{gap:var(--space-2);display:grid}.field label{color:var(--color-ink);font-size:.8125rem;font-weight:700;line-height:1.3}.field input{width:100%;min-height:48px;padding:0 var(--space-3);border:1px solid var(--color-line);border-radius:var(--radius-control);color:var(--color-ink);background:var(--color-surface)}.field input:hover{border-color:var(--color-ink)}.field input:disabled{background:var(--color-surface-muted);color:var(--color-text-muted)}.field__help,.field__error{margin:0;font-size:.875rem;line-height:1.5}.field__help{color:var(--color-text-muted)}.field__error{color:var(--color-danger)}.field input[aria-invalid=true]{border-color:var(--color-danger)}.results{gap:var(--space-3);margin-top:var(--space-6);display:grid}.result{padding:var(--space-4);border-radius:var(--radius-card);background:var(--color-surface-muted)}.result small{color:var(--color-text-muted);font-size:.75rem;font-weight:650;display:block}.result output{margin-top:var(--space-2);letter-spacing:-.03em;font-size:1.5rem;font-weight:750;display:block}.result--accent{background:var(--color-action);color:var(--color-ink)}.result--accent small,.result--accent .result__note{color:var(--color-ink)}.result--loss{background:var(--color-surface-muted)}.result__note{margin-top:var(--space-1);font-size:.8125rem;font-weight:650;display:block}.formula{margin-top:var(--space-6);padding:var(--space-4);border-radius:var(--radius-card);background:var(--color-surface-muted);font-size:.95rem}.formula p,.formula li{color:var(--color-ink);margin:0}.formula ul{margin:var(--space-3) 0 0;padding-left:1.15rem}.tool-note{padding:var(--space-6);border:1px solid var(--color-line);border-radius:var(--radius-panel);background:var(--color-surface-muted)}.tool-note h2{font-size:1.5rem}.tool-note ul{color:var(--color-ink);margin:0;padding-left:1.15rem}.tool-page .catalog-grid{max-width:46rem}.post-list{border-top:1px solid var(--color-line);display:grid}.post-card{gap:var(--space-3);padding:var(--space-6) 0;border-bottom:1px solid var(--color-line);display:grid}.post-card__date,.blog-post__date,.blog-post__updated,.blog-post__author,.blog-post__meta{color:var(--color-text-muted);font-size:.875rem;font-weight:550}.blog-post__author{margin:0}.post-card h2{margin:0 0 var(--space-2);letter-spacing:-.03em;font-size:1.5rem}.post-card p{max-width:46rem;color:var(--color-text-muted);margin:0}.post-card a:hover{text-underline-offset:.16em;text-decoration:underline}.blog-post-grid{gap:var(--space-8);display:grid}.blog-post{min-width:0;max-width:var(--prose-width)}.blog-post__toolbar{justify-content:space-between;align-items:center;gap:var(--space-3) var(--space-6);margin-bottom:var(--space-6);flex-wrap:wrap;display:flex}.back-link{min-height:44px;color:var(--color-text-muted);align-items:center;font-size:.95rem;font-weight:650;display:inline-flex}.blog-rss-link{border:1px solid var(--color-ink);border-radius:var(--radius-control);min-height:44px;color:var(--color-ink);align-items:center;gap:.4rem;padding:0 .85rem;font-size:.95rem;font-weight:650;display:inline-flex}.blog-rss-link__icon{flex-shrink:0}.blog-rss-link:hover{background:var(--color-action);text-decoration:none}.back-link:hover{color:var(--color-ink);text-underline-offset:.16em;text-decoration:underline}.blog-post h1{max-width:18ch;font-size:clamp(2.25rem,4.5vw,4rem)}.blog-post__meta{gap:var(--space-3);margin-bottom:var(--space-8);flex-wrap:wrap;display:flex}.prose{max-width:72ch}.prose h2,.prose h3{scroll-margin-top:calc(var(--header-height) + var(--space-4))}.prose h2{margin:var(--space-12) 0 var(--space-4);font-size:clamp(1.5rem,2.4vw,2rem)}.prose h3{margin:var(--space-8) 0 var(--space-3)}.prose p,.prose li{color:var(--color-ink);line-height:1.75}.prose img{width:100%;max-width:100%;height:auto;margin:var(--space-8) 0 var(--space-3);border-radius:var(--radius-card);display:block}.prose table{width:100%;margin:var(--space-6) 0;border-collapse:collapse;font-size:.95rem}.prose th,.prose td{border-bottom:1px solid var(--color-line);text-align:left;vertical-align:top;padding:.65rem .75rem}.prose ul,.prose ol{padding-left:1.2rem}.prose code{background:var(--color-surface-muted);border-radius:.25rem;padding:.1em .35em;font-size:.88em}.table-of-contents{padding:var(--space-4);border:1px solid var(--color-line);border-radius:var(--radius-card);background:var(--color-surface)}.table-of-contents summary{cursor:pointer;letter-spacing:.08em;text-transform:uppercase;font-size:.78rem;font-weight:750}.table-of-contents nav{gap:var(--space-3);margin-top:var(--space-4);display:grid}.table-of-contents a{color:var(--color-text-muted);font-size:.875rem;line-height:1.4}.table-of-contents a:hover,.table-of-contents a:focus-visible{color:var(--color-ink);text-underline-offset:.14em;text-decoration:underline}.table-of-contents a.nested{padding-left:var(--space-3);font-size:.8125rem}.related-posts{min-width:0;padding-top:var(--space-6);border-top:1px solid var(--color-line);grid-column:1}.related-posts h2{margin:0 0 var(--space-4);letter-spacing:-.02em;font-size:1.25rem}.related-posts ul{gap:var(--space-3);margin:0;padding:0;list-style:none;display:grid}.related-posts li{align-items:baseline;gap:.25rem var(--space-3);flex-wrap:wrap;display:flex}.related-posts a{font-weight:650}.related-posts a:hover{text-underline-offset:.16em;text-decoration:underline}.related-posts time{color:var(--color-text-muted);white-space:nowrap;font-size:.875rem;font-weight:550}.not-found{gap:var(--space-8);padding:var(--space-16) 0;display:grid}@media (width>=640px){.form-grid,.results{grid-template-columns:1fr 1fr}.result--accent{grid-column:1/-1}.hero h1,.page-intro h1{max-width:20ch}}@media (width>=900px){.site-header__inner{grid-template-columns:minmax(12rem,1fr) auto minmax(12rem,1fr)}.site-nav{display:flex}.site-header__actions{justify-self:end}.menu-toggle{display:none}.cta-label--full{display:inline}.cta-label--short{display:none}.site-header__cta{min-height:48px;padding-inline:1.15rem;font-size:.95rem}.site-footer__inner{grid-template-columns:1.4fr 1fr;align-items:start}.site-footer__legal{grid-column:1/-1}.site-footer__nav{justify-content:flex-end}.site-footer__nav nav{text-align:right}.hero__grid,.product-feature,.tool-workspace,.blog-post-grid,.section-heading,.not-found{gap:var(--space-16);grid-template-columns:1.05fr .95fr}.section-heading{align-items:end}.blog-post-grid{grid-template-columns:minmax(0, var(--prose-width)) var(--toc-width);justify-content:center}.table-of-contents{top:calc(var(--header-height) + var(--space-6));align-self:start;height:max-content;position:sticky}.table-of-contents summary{pointer-events:none;list-style:none}.table-of-contents summary::-webkit-details-marker{display:none}.hero,.section,.not-found{padding-block:var(--space-24)}.form-grid{grid-template-columns:1fr 1fr}.results{grid-template-columns:repeat(3,1fr)}.result--accent{grid-column:auto}}@media (width>=1200px){.shell{width:min(var(--container), calc(100% - 8rem))}}@media (width<=359px){.brand-mark__name{display:none}.site-header__cta{padding-inline:.65rem}}@media (width<=639px){.site-header__inner{gap:var(--space-2)}}@media (width<=899px){.site-nav{inset:var(--header-height) 0 auto;padding:var(--space-4) var(--page-gutter) var(--space-6);border-bottom:1px solid var(--color-line);background:var(--color-paper);box-shadow:var(--shadow-raised);flex-direction:column;align-items:stretch;gap:0;display:none;position:absolute}.site-nav a{border-bottom:1px solid var(--color-line);min-height:48px;box-shadow:none;align-items:center;display:flex}.site-nav a.active{box-shadow:none;color:var(--color-ink);background:var(--color-surface-muted)}.site-header.is-open .site-nav{display:flex}.blog-post-grid .table-of-contents{order:-1}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition:none!important;animation:none!important}.button:hover{transform:none}}@media (forced-colors:active){.button,.menu-toggle,.locale-switch__summary,.locale-switch__menu,.status-badge,.feature-card,.tool-card,.product-card,.calculator-card{border:1px solid canvastext}.brand-mark__badge,.result--accent{forced-color-adjust:none}}