:root{--paper:#f5f8fb;--paper-2:#edf4fa;--ink:#172a3a;--muted:#5b6c78;--blue:#26658c;--blue-dark:#173f5b;--sky:#9bc9e6;--line:#cfdae3;--white:#fff;--accent:#d8ebf6;--shadow:0 16px 40px rgba(23,63,91,.09);--radius:22px;--shell:min(1180px,calc(100% - 40px))}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;font-size:17px;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration-thickness:1px;text-underline-offset:4px}img{display:block;max-width:100%;height:auto}.shell{width:var(--shell);margin-inline:auto}.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:fixed;left:12px;top:-80px;z-index:1000;background:var(--ink);color:#fff;padding:10px 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var(--line);background:var(--white);width:44px;height:42px;border-radius:12px;padding:10px;align-items:center;justify-content:center;flex-direction:column;gap:4px}.drawer-toggle span:not(.sr-only){display:block;width:20px;height:2px;background:var(--ink);border-radius:2px}.hero{display:grid;grid-template-columns:minmax(0,1.02fr) minmax(320px,.98fr);align-items:center;gap:64px;min-height:670px;padding-block:78px}.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:800;color:var(--blue);margin:0 0 12px}.hero h1,.page-intro h1,.article-header h1,.not-found h1{font-size:clamp(2.55rem,6vw,5.7rem);line-height:1.03;letter-spacing:-.045em;margin:0 0 24px;overflow-wrap:anywhere}.hero-lead,.dek,.page-intro>p{font-size:clamp(1.05rem,2vw,1.3rem);color:var(--muted);max-width:700px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:30px 0}.button{display:inline-flex;min-height:48px;align-items:center;justify-content:center;padding:11px 19px;border-radius:12px;border:1px solid var(--blue-dark);font:inherit;font-weight:750;text-decoration:none;cursor:pointer}.button.primary{background:var(--blue-dark);color:#fff}.button.secondary{background:transparent;color:var(--blue-dark)}.button:hover,.button:focus-visible{transform:translateY(-1px);box-shadow:0 8px 20px rgba(23,63,91,.12)}.hero-note{font-size:13px;color:var(--muted)}.hero-note span{color:var(--blue);margin-right:6px}.hero-visual{background:linear-gradient(145deg,var(--white),var(--paper-2));border:1px solid var(--line);border-radius:38% 62% 62% 38%/44% 42% 58% 56%;padding:28px;box-shadow:var(--shadow)}.compass-key{display:grid;grid-template-columns:1fr 1fr;gap:8px;font-size:12px;color:var(--muted)}.compass-key span{background:rgba(255,255,255,.8);padding:7px 10px;border-radius:999px;text-align:center}.purpose-band{background:var(--blue-dark);color:#fff;padding:64px 0}.split-copy{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px;align-items:start}.split-copy h2,.section-heading h2,.copy-panel h2,.source-note h2,.faq h2{font-size:clamp(2rem,4vw,3.4rem);line-height:1.08;letter-spacing:-.035em;margin:0}.split-copy p:last-child{margin:0;color:#d8e9f4;font-size:1.1rem}.section{padding-block:88px}.section.compact{padding-block:34px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:40px;margin-bottom:32px}.section-heading>p{max-width:460px;color:var(--muted);margin:0}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.card-grid.two,.related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.soft-card{min-width:0;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:0 7px 22px rgba(23,63,91,.045)}.soft-card h2{font-size:1.12rem;line-height:1.35;margin:0 0 12px;overflow-wrap:anywhere}.soft-card h2 a{text-decoration:none}.soft-card p:not(.eyebrow){color:var(--muted);font-size:.94rem}.text-link{color:var(--blue-dark);font-weight:750;font-size:.92rem}.visual-split{display:grid;grid-template-columns:minmax(300px,.8fr) minmax(0,1.2fr);gap:68px;align-items:start}.visual-panel{position:sticky;top:110px;background:var(--accent);border-radius:var(--radius);padding:30px}.caption{font-size:13px;color:var(--muted);margin:12px 0 0}.stacked-cards{display:grid;gap:12px;margin-top:28px}.stacked-cards .soft-card{padding:20px}.tool-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.tool-card{display:flex;gap:18px;align-items:start;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-decoration:none}.tool-index{font-size:.8rem;font-weight:800;color:var(--blue)}.tool-card strong{display:block;font-size:1.12rem}.tool-card small{display:block;color:var(--muted);margin-top:5px}.source-note{background:var(--white);border:1px solid var(--line);border-radius:32px;padding-inline:44px;display:grid;grid-template-columns:1.2fr .8fr;gap:46px;align-items:center}.faq-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:28px}.faq-grid article{background:var(--paper-2);border-radius:var(--radius);padding:24px}.faq-grid h3{font-size:1rem;margin-top:0}.site-footer{background:#102b3e;color:#d7e6ef;padding:64px 0 20px;margin-top:80px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:50px}.footer-title,.footer-heading{color:#fff;font-weight:800;margin:0 0 10px}.footer-title{font-size:1.25rem}.footer-links{display:grid;gap:5px}.footer-links a{color:#d7e6ef;font-size:.92rem}.status-chip{display:inline-block;background:rgba(155,201,230,.12);border:1px solid rgba(155,201,230,.3);border-radius:999px;padding:5px 10px;font-size:12px}.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.12);margin-top:42px;padding-top:18px;font-size:12px;color:#a9c2d2}.page-shell,.article-shell,.tool-shell{padding-block:42px 80px}.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:52px}.page-intro,.article-header{max-width:920px;margin-bottom:42px}.page-intro h1,.article-header h1{font-size:clamp(2.3rem,5vw,4.6rem)}.listing-page .card-grid,.tag-page .card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.tag-page .card-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.method-note,.inline-note{background:var(--accent);border-left:4px solid var(--blue);border-radius:0 var(--radius) var(--radius) 0;padding:24px;margin-top:36px}.method-note h2{margin-top:0}.article-shell{max-width:900px}.article-header{border-bottom:1px solid var(--line);padding-bottom:34px}.byline,.tag-row{display:flex;flex-wrap:wrap;gap:10px 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label{display:flex;align-items:flex-start;gap:12px;background:var(--paper-2);border-radius:14px;padding:16px;cursor:pointer}.check-list input{width:20px;height:20px;accent-color:var(--blue);flex:0 0 auto;margin-top:3px}.role-line{font-size:.95rem!important;background:var(--accent);padding:12px 15px;border-radius:12px}.not-found{min-height:630px;display:grid;grid-template-columns:1fr .8fr;align-items:center;gap:60px;padding-block:80px}.error-code{font-size:clamp(4rem,12vw,9rem);font-weight:900;line-height:.8;color:var(--sky);margin:0 0 28px}.not-found h1{font-size:clamp(2rem,5vw,4rem)}
@media(max-width:1000px){.site-nav a{padding-inline:6px;font-size:13px}.hero{gap:34px}.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.listing-page .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.faq-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1.2fr 1fr}.footer-grid>div:last-child{grid-column:1/-1}.source-note{grid-template-columns:1fr}.source-note img{width:100%;max-width:420px}.visual-split{gap:36px}}
@media(max-width:800px){:root{--shell:min(100% - 28px,700px)}body{font-size:16px}.header-row{min-height:64px}.drawer-toggle{display:flex}.site-nav{position:absolute;left:0;right:0;top:calc(100% + 1px);display:none;margin:0;background:var(--white);border:1px solid var(--line);border-radius:0 0 18px 18px;box-shadow:var(--shadow);padding:10px;max-height:calc(100vh - 80px);overflow:auto;flex-direction:column;align-items:stretch}.site-nav.is-open{display:flex}.site-nav a{padding:11px 12px;font-size:15px}.hero{grid-template-columns:1fr;min-height:auto;padding-block:52px}.hero-visual{max-width:620px}.split-copy,.visual-split,.not-found{grid-template-columns:1fr;gap:32px}.visual-panel{position:static}.section{padding-block:62px}.section-heading{display:block}.section-heading>p{margin-top:14px}.source-note{margin-inline:14px;width:auto;padding:28px}.footer-grid{grid-template-columns:1fr 1fr}.not-found img{width:100%;max-width:500px}.breadcrumb{margin-bottom:34px}}
@media(max-width:560px){:root{--shell:calc(100% - 24px)}.wordmark{font-size:14px}.mark{width:32px;height:32px}.hero h1,.page-intro h1,.article-header h1{letter-spacing:-.035em}.hero-actions{display:grid}.button{width:100%}.card-grid,.card-grid.two,.listing-page .card-grid,.tag-page .card-grid.two,.related-grid,.tool-grid,.footer-grid{grid-template-columns:1fr}.soft-card{padding:21px}.compass-key{grid-template-columns:1fr}.purpose-band{padding-block:46px}.source-note{margin-inline:10px;padding:24px}.panel-heading{display:block}.panel-heading output{display:block;margin-top:10px}.interactive-panel{padding:20px}.footer-grid>div:last-child{grid-column:auto}.footer-bottom{display:grid}.not-found{padding-block:54px}.site-footer{margin-top:50px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}