.cookie-consent[data-astro-cid-yjgbfhnf]{position:fixed;z-index:60;bottom:0;left:0;padding:1rem clamp(1.25rem,3vw,2.5rem) 1.25rem;pointer-events:none}.cookie-consent[data-astro-cid-yjgbfhnf][hidden]{display:none}.cookie-consent-inner[data-astro-cid-yjgbfhnf]{pointer-events:auto;display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:1rem 1.5rem;max-width:calc(var(--site-width) / 2);margin-inline:auto;padding:1.1rem 1.25rem;border:1px solid var(--color-line);border-radius:.75rem;background:var(--color-surface);box-shadow:0 -8px 32px #0b122014}.cookie-consent-copy[data-astro-cid-yjgbfhnf]{flex:1 1 16rem;min-width:0}.cookie-consent-desc[data-astro-cid-yjgbfhnf]{margin:0;font-family:var(--font-ui);font-size:.875rem;line-height:1.5;color:var(--color-muted)}.cookie-consent-desc[data-astro-cid-yjgbfhnf] a[data-astro-cid-yjgbfhnf]{color:var(--color-primary)}.cookie-consent-actions[data-astro-cid-yjgbfhnf]{display:flex;flex-wrap:wrap;gap:.5rem;flex:0 0 auto}.cookie-consent-primary[data-astro-cid-yjgbfhnf],.cookie-consent-secondary[data-astro-cid-yjgbfhnf]{min-height:2.75rem;padding-inline:1rem;border-radius:.5rem;font-family:var(--font-ui);font-size:.875rem;font-weight:500;cursor:pointer}.cookie-consent-primary[data-astro-cid-yjgbfhnf]{border:0;background:var(--color-primary);color:#fff}.cookie-consent-primary[data-astro-cid-yjgbfhnf]:hover{background:var(--color-primary-hover)}.cookie-consent-secondary[data-astro-cid-yjgbfhnf]{border:1px solid var(--color-line);background:transparent;color:var(--color-ink)}.cookie-consent-secondary[data-astro-cid-yjgbfhnf]:hover{background:var(--color-wash)}.cookie-consent-primary[data-astro-cid-yjgbfhnf]:focus-visible,.cookie-consent-secondary[data-astro-cid-yjgbfhnf]:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}:root{--color-primary: #1d4ed8;--color-primary-hover: #1e40af;--color-primary-wash: #eaf0fd;--color-ink: #0b1220;--color-ink-soft: #2b3550;--color-muted: #4b5568;--color-faint: #8d97ad;--color-line: #dbe3ee;--color-line-strong: #c3cfe0;--color-surface: #ffffff;--color-surface-tint: #eaf0fd;--color-wash: #f4f7fb;--color-dark: #181818;--color-dark-raised: #272727;--color-dark-line: #313131;--color-dark-ink: #f4f7fb;--color-dark-muted: #9ca3af;--accent-speaking: #1d4ed8;--accent-writing: #7c3aed;--accent-reading: #0e9488;--accent-listening: #d9480f;--site-width: 80rem;--measure-hero: 680px;--measure-prose: 68ch;--space-0: 0;--space-25: 2px;--space-50: 4px;--space-75: 8px;--space-100: 12px;--space-200: 16px;--space-300: 24px;--space-400: 32px;--space-500: 40px;--space-600: 48px;--space-700: 64px;--space-800: 80px;--space-900: 96px;--radius-xs: 4px;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--radius-pill: 999px;--shadow: 0 4px 16px rgba(11, 18, 32, .08);--shadow-lift: 0 12px 28px rgba(11, 18, 32, .12);--font-heading: "Elms Sans", "Host Grotesk", sans-serif;--font-body: "Host Grotesk", sans-serif;--font-ui: "Host Grotesk", sans-serif;--font-cjk-sc: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;--font-cjk-tc: "PingFang TC", "Hiragino Sans CNS", "Noto Sans TC", "Microsoft JhengHei", sans-serif;--text-xs: .75rem;--text-xs-lh: 1rem;--text-sm: .875rem;--text-sm-lh: 1.25rem;--text-base: 1rem;--text-base-lh: 1.5rem;--text-lg: 1.125rem;--text-lg-lh: 1.75rem;--text-xl: 1.25rem;--text-xl-lh: 1.75rem;--text-2xl: 1.5rem;--text-2xl-lh: 2rem;--text-3xl: 1.875rem;--text-3xl-lh: 2.25rem;--text-4xl: 2.25rem;--text-4xl-lh: 2.5rem;--text-5xl: 3rem;--text-6xl: 3.75rem;--text-7xl: 4.5rem;--weight-regular: 400;--weight-medium: 500;--weight-semibold: 600;--weight-bold: 700;--tracking-tight: -.03em;--tracking-label: .1em;--ease-fluid: cubic-bezier(.32, .72, 0, 1);--dur-reveal: .8s;--dur-ui: .7s;--dur-fast: .24s}@font-face{font-family:Elms Sans;font-style:normal;font-weight:400 700;font-display:swap;src:url(/fonts/elms-sans-vietnamese.woff2) format("woff2");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Elms Sans;font-style:normal;font-weight:400 700;font-display:swap;src:url(/fonts/elms-sans-latin-ext.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Elms Sans;font-style:normal;font-weight:400 700;font-display:swap;src:url(/fonts/elms-sans-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Host Grotesk;font-style:normal;font-weight:300 700;font-display:swap;src:url(/fonts/host-grotesk-latin-ext.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Host Grotesk;font-style:normal;font-weight:300 700;font-display:swap;src:url(/fonts/host-grotesk-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}*,*:before,*:after{box-sizing:border-box}html,body{margin:0;min-height:100%;overflow-x:clip}html{-webkit-text-size-adjust:100%}body{font-family:var(--font-body);font-size:var(--text-base);line-height:var(--text-base-lh);font-weight:var(--weight-regular);color:var(--color-ink);background:var(--color-wash);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}html.locale-cjk[lang=zh-Hans] body,html.locale-cjk[lang=zh-Hans] :is(h1,h2,h3,h4,h5,h6){font-family:var(--font-body),var(--font-cjk-sc)}html.locale-cjk[lang=zh-Hans] :is(h1,h2,h3,h4,h5,h6){font-family:var(--font-heading),var(--font-cjk-sc)}html.locale-cjk[lang=zh-Hant] body,html.locale-cjk[lang=zh-Hant] :is(h1,h2,h3,h4,h5,h6){font-family:var(--font-body),var(--font-cjk-tc)}html.locale-cjk[lang=zh-Hant] :is(h1,h2,h3,h4,h5,h6){font-family:var(--font-heading),var(--font-cjk-tc)}img,svg,video{display:block;max-width:100%}h1,h2,h3,h4{font-family:var(--font-heading);font-weight:var(--weight-semibold);letter-spacing:var(--tracking-tight);text-wrap:balance}p{text-wrap:pretty}button{cursor:pointer;font:inherit}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px;border-radius:var(--radius-xs)}.skip-link{position:absolute;left:var(--space-200);top:var(--space-200);z-index:100;padding:var(--space-75) var(--space-200);border-radius:var(--radius-sm);background:var(--color-ink);color:var(--color-surface);font-family:var(--font-ui);font-size:var(--text-sm);font-weight:var(--weight-semibold);text-decoration:none;transform:translateY(calc(-100% - var(--space-400)));transition:transform var(--dur-fast) var(--ease-fluid)}.skip-link:focus-visible{transform:translateY(0)}.page{padding:var(--space-500) 0 var(--space-800)}.page--content{background:var(--color-surface)}.page--flush{padding:0}.page-shell{width:100%;max-width:var(--site-width);margin-inline:auto;padding-inline:clamp(var(--space-200),3vw,var(--space-500));box-sizing:border-box;min-width:0}.band{padding-block:clamp(var(--space-700),9vw,var(--space-900));scroll-margin-top:var(--space-800)}.band--surface{background:var(--color-surface)}.band--wash{background:var(--color-wash)}.band--tint{background:var(--color-surface-tint)}.band--dark{background:var(--color-dark);color:var(--color-dark-ink)}.eyebrow{margin:0;font-family:var(--font-ui);font-size:var(--text-xs);line-height:var(--text-xs-lh);font-weight:var(--weight-semibold);letter-spacing:var(--tracking-label);text-transform:uppercase;color:var(--color-primary)}.band--dark .eyebrow{color:var(--color-dark-muted)}.section-head{display:grid;gap:var(--space-200);max-width:var(--measure-hero);margin-bottom:var(--space-600)}.section-head h2{margin:0;font-size:clamp(var(--text-3xl),4vw,var(--text-4xl));line-height:1.15}.section-head p{margin:0;font-size:var(--text-lg);line-height:var(--text-lg-lh);color:var(--color-muted)}.band--dark .section-head p{color:var(--color-dark-muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-75);min-height:2.75rem;padding:var(--space-75) var(--space-300);border:0;border-radius:var(--radius-sm);font-family:var(--font-ui);font-size:var(--text-base);line-height:var(--text-base-lh);font-weight:var(--weight-semibold);text-decoration:none;white-space:nowrap;cursor:pointer;transition:background var(--dur-fast) var(--ease-fluid),border-color var(--dur-fast) var(--ease-fluid),color var(--dur-fast) var(--ease-fluid),transform var(--dur-fast) var(--ease-fluid)}.btn:active{transform:scale(.98)}.btn--sm{min-height:2.5rem;padding-inline:var(--space-200);font-size:var(--text-sm);line-height:var(--text-sm-lh)}.btn--primary,.auth-cta-primary{background:var(--color-primary);color:#fff}.btn--primary:hover,.auth-cta-primary:hover{background:var(--color-primary-hover)}.btn--secondary,.auth-cta-secondary{border:1px solid var(--color-line);background:var(--color-surface);color:var(--color-ink)}.btn--secondary:hover,.auth-cta-secondary:hover{border-color:var(--color-primary);color:var(--color-primary)}.btn--onDark{background:var(--color-surface);color:var(--color-ink)}.btn--onDark:hover{background:var(--color-dark-ink)}.auth-cta-primary,.auth-cta-secondary{display:inline-flex;align-items:center;justify-content:center;min-height:2.75rem;padding:var(--space-75) var(--space-300);border-radius:var(--radius-sm);font-family:var(--font-ui);font-size:var(--text-base);line-height:var(--text-base-lh);font-weight:var(--weight-semibold);text-decoration:none;white-space:nowrap;cursor:pointer;transition:background var(--dur-fast) var(--ease-fluid),border-color var(--dur-fast) var(--ease-fluid),color var(--dur-fast) var(--ease-fluid),transform var(--dur-fast) var(--ease-fluid)}.auth-cta-primary{border:0}.auth-cta-primary:active,.auth-cta-secondary:active{transform:scale(.98)}.auth-cta-cluster{display:flex;align-items:center;flex-wrap:wrap;gap:var(--space-100)}.category-pill{display:inline-flex;align-items:center;padding:var(--space-50) var(--space-100);border-radius:var(--radius-pill);background:var(--color-primary-wash);color:var(--color-primary);font-family:var(--font-ui);font-size:var(--text-sm);line-height:var(--text-sm-lh);font-weight:var(--weight-medium)}html[data-reveal-ready] [data-reveal]{opacity:0;transform:translateY(var(--space-700));filter:blur(12px);transition:opacity var(--dur-reveal) var(--ease-fluid),transform var(--dur-reveal) var(--ease-fluid),filter var(--dur-reveal) var(--ease-fluid)}html[data-reveal-ready] [data-reveal].is-revealed{opacity:1;transform:translateY(0);filter:blur(0)}html[data-reveal-ready] [data-reveal-word]{color:color-mix(in srgb,currentColor 30%,transparent);transition:color var(--dur-ui) var(--ease-fluid)}html[data-reveal-ready] [data-reveal-word].is-revealed{color:inherit}.site-footer{background:var(--color-dark);color:var(--color-dark-ink);padding:var(--space-800) 0 var(--space-500)}.footer-inner{display:grid;gap:var(--space-500)}.footer-brand-block{display:grid;gap:var(--space-300);width:fit-content}.footer-brand{display:inline-flex;width:fit-content}.footer-logo{display:block;height:1.75rem;width:auto}.footer-support{margin:0;display:grid;gap:var(--space-25);font-family:var(--font-ui);font-size:var(--text-sm);line-height:var(--text-sm-lh)}.footer-support-label{color:var(--color-dark-muted);text-transform:uppercase;letter-spacing:var(--tracking-label);font-size:var(--text-xs)}.footer-support a{color:inherit;text-decoration:none;word-break:break-all}.footer-support a:hover{text-decoration:underline}.footer-cols{display:grid;gap:var(--space-400);grid-template-columns:repeat(4,minmax(0,1fr))}.footer-cols h2{margin:0 0 var(--space-200);font-family:var(--font-ui);font-size:var(--text-sm);line-height:var(--text-sm-lh);font-weight:var(--weight-medium);letter-spacing:var(--tracking-label);text-transform:uppercase;color:var(--color-dark-muted)}.footer-cols ul{list-style:none;margin:0;padding:0;display:grid;gap:var(--space-100)}.footer-cols a,.footer-disclaimer a,.footer-cookie-settings{color:inherit;text-decoration:none;font-family:var(--font-ui);font-size:var(--text-sm);line-height:var(--text-sm-lh)}.footer-cookie-settings{display:inline;padding:0;border:0;background:none;cursor:pointer;text-align:left;color:inherit}.footer-cols a:hover,.footer-disclaimer a:hover,.footer-cookie-settings:hover{text-decoration:underline}.footer-cookie-settings:focus-visible{outline:2px solid #93c5fd;outline-offset:2px}.footer-disclaimer{margin:0;padding-top:var(--space-400);border-top:1px solid var(--color-dark-line);font-family:var(--font-ui);font-size:var(--text-sm);line-height:var(--text-sm-lh);color:var(--color-dark-muted)}@media(max-width:1100px){.footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-400)}}@media(max-width:640px){.footer-cols{grid-template-columns:1fr;gap:var(--space-400)}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition-duration:.01ms!important;animation-duration:.01ms!important;scroll-behavior:auto!important}}.lang-switch[data-astro-cid-a2mxz4y6]{display:inline-flex;align-items:center}.lang-select[data-astro-cid-a2mxz4y6]{appearance:none;margin:0;padding:.35rem 1.6rem .35rem .65rem;border:1px solid var(--color-line);border-radius:999px;background-color:var(--color-surface);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%235B6472' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .55rem center;background-size:.65rem;color:var(--color-ink);font-family:var(--font-ui);font-size:var(--text-sm);line-height:1.2;cursor:pointer}.lang-select[data-astro-cid-a2mxz4y6]:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}.sr-only[data-astro-cid-a2mxz4y6]{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.island[data-astro-cid-ctg3m53h]{position:sticky;top:0;z-index:50;width:100%;max-width:var(--site-width);margin-inline:auto;padding:var(--space-200) clamp(var(--space-200),3vw,var(--space-500)) var(--space-100);box-sizing:border-box;min-width:0}.pill[data-astro-cid-ctg3m53h]{display:flex;align-items:center;gap:var(--space-300);width:100%;padding:var(--space-75) var(--space-75) var(--space-75) var(--space-300);border:1px solid var(--color-line);border-radius:var(--radius-pill);background:#ffffffd1;backdrop-filter:blur(16px) saturate(1.4);box-shadow:var(--shadow);box-sizing:border-box;min-width:0}.brand[data-astro-cid-ctg3m53h]{display:flex;align-items:center;flex-shrink:0;text-decoration:none}.brand-logo[data-astro-cid-ctg3m53h]{height:1.75rem;width:auto;display:block}.brand-logo--mark[data-astro-cid-ctg3m53h]{display:none}.links[data-astro-cid-ctg3m53h]{display:flex;align-items:center;gap:var(--space-300);margin:0;padding:0;list-style:none}.links[data-astro-cid-ctg3m53h] a[data-astro-cid-ctg3m53h]{font-family:var(--font-ui);font-size:var(--text-sm);line-height:var(--text-sm-lh);font-weight:var(--weight-medium);color:var(--color-ink-soft);text-decoration:none;transition:color var(--dur-fast) var(--ease-fluid)}.links[data-astro-cid-ctg3m53h] a[data-astro-cid-ctg3m53h]:hover,.links[data-astro-cid-ctg3m53h] a[data-astro-cid-ctg3m53h][aria-current=page]{color:var(--color-primary)}.actions[data-astro-cid-ctg3m53h]{display:flex;align-items:center;gap:var(--space-200);flex-shrink:1;min-width:0;margin-inline-start:auto}.login[data-astro-cid-ctg3m53h]{font-family:var(--font-ui);font-size:var(--text-sm);line-height:var(--text-sm-lh);font-weight:var(--weight-medium);color:var(--color-ink-soft);text-decoration:none;transition:color var(--dur-fast) var(--ease-fluid)}.login[data-astro-cid-ctg3m53h]:hover{color:var(--color-primary)}.start[data-astro-cid-ctg3m53h]{border-radius:var(--radius-pill)}.burger[data-astro-cid-ctg3m53h]{display:none;position:relative;width:2.5rem;height:2.5rem;padding:0;border:1px solid var(--color-line);border-radius:var(--radius-pill);background:var(--color-surface)}.burger-line[data-astro-cid-ctg3m53h]{position:absolute;left:50%;width:1rem;height:2px;border-radius:var(--radius-pill);background:var(--color-ink);transition:transform var(--dur-ui) var(--ease-fluid),top var(--dur-ui) var(--ease-fluid)}.burger-line[data-astro-cid-ctg3m53h]:nth-child(1){top:calc(50% - 4px);transform:translate(-50%)}.burger-line[data-astro-cid-ctg3m53h]:nth-child(2){top:calc(50% + 2px);transform:translate(-50%)}.burger[data-astro-cid-ctg3m53h][aria-expanded=true] .burger-line[data-astro-cid-ctg3m53h]:nth-child(1){top:calc(50% - 1px);transform:translate(-50%) rotate(45deg)}.burger[data-astro-cid-ctg3m53h][aria-expanded=true] .burger-line[data-astro-cid-ctg3m53h]:nth-child(2){top:calc(50% - 1px);transform:translate(-50%) rotate(-45deg)}.overlay[data-astro-cid-ctg3m53h]{position:fixed;inset:0;z-index:45;display:grid;align-content:center;gap:var(--space-600);padding:var(--space-800) var(--space-400);background:#ffffffdb;backdrop-filter:blur(32px)}.overlay[data-astro-cid-ctg3m53h][hidden]{display:none}.overlay-links[data-astro-cid-ctg3m53h]{display:grid;gap:var(--space-300);margin:0;padding:0;list-style:none}.overlay-links[data-astro-cid-ctg3m53h] a[data-astro-cid-ctg3m53h],.overlay-cta[data-astro-cid-ctg3m53h]{opacity:0;transform:translateY(var(--space-600));transition:opacity var(--dur-ui) var(--ease-fluid) var(--stagger, 0ms),transform var(--dur-ui) var(--ease-fluid) var(--stagger, 0ms)}.overlay-links[data-astro-cid-ctg3m53h] a[data-astro-cid-ctg3m53h]{display:block;font-family:var(--font-heading);font-size:var(--text-4xl);line-height:var(--text-4xl-lh);font-weight:var(--weight-semibold);letter-spacing:var(--tracking-tight);color:var(--color-ink);text-decoration:none}.overlay-cta[data-astro-cid-ctg3m53h]{justify-self:start;border-radius:var(--radius-pill)}.overlay[data-astro-cid-ctg3m53h].is-open .overlay-links[data-astro-cid-ctg3m53h] a[data-astro-cid-ctg3m53h],.overlay[data-astro-cid-ctg3m53h].is-open .overlay-cta[data-astro-cid-ctg3m53h]{opacity:1;transform:translateY(0)}@media(max-width:879px){.brand-logo[data-astro-cid-ctg3m53h]{height:1.375rem}}@media(max-width:900px){.links[data-astro-cid-ctg3m53h]{display:none}.pill[data-astro-cid-ctg3m53h]{gap:var(--space-200);padding-inline-start:var(--space-200)}.burger[data-astro-cid-ctg3m53h]{display:block;flex-shrink:0}.login[data-astro-cid-ctg3m53h],.lang-desktop[data-astro-cid-ctg3m53h]{display:none}.start[data-astro-cid-ctg3m53h]{white-space:nowrap}}.overlay-lang[data-astro-cid-ctg3m53h]{padding-top:var(--space-100)}@media(max-width:420px){.start[data-astro-cid-ctg3m53h]{padding-inline:var(--space-200);font-size:var(--text-sm)}}@media(max-width:379px){.brand-logo--lockup[data-astro-cid-ctg3m53h]{display:none}.brand-logo--mark[data-astro-cid-ctg3m53h]{display:block;height:1.375rem;width:1.375rem}}