:root{--navy:#0b2a4f;--navy2:#071d35;--blue:#168cf2;--blue2:#0676d8;--cyan:#e8f6ff;--orange:#ff8a13;--green:#18a66a;--red:#ef453a;--ink:#152b43;--muted:#64758a;--line:#dfe8f1;--paper:#fff;--soft:#f7fafc;--shadow:0 12px 34px rgba(10,36,62,.10);--radius:18px;--max:1280px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff;line-height:1.55}a{color:inherit;text-decoration:none}img,svg{max-width:100%;display:block}button,input,select,textarea{font:inherit}.container{width:min(var(--max),calc(100% - 48px));margin:auto}.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid rgba(11,42,79,.08);transition:.25s box-shadow}.site-header.scrolled{box-shadow:0 10px 30px rgba(5,25,47,.09)}.nav-wrap{width:min(1420px,calc(100% - 40px));margin:auto;height:78px;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;gap:10px;min-width:max-content}.brand-mark{width:42px;height:42px}.brand strong{display:block;font-size:21px;line-height:1;color:var(--navy);letter-spacing:.1px}.brand strong b{color:var(--blue)}.brand 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.container{display:grid;grid-template-columns:repeat(5,1fr);align-items:center;gap:10px;padding:12px 0}.trust-strip span{text-align:center;font-size:12px;font-weight:800;color:#11365a}.section{padding:18px 0 34px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:14px}.section h2,.section-title{font-size:29px;line-height:1.12;margin:0 0 4px;color:var(--navy);letter-spacing:-.6px}.section-intro{margin:0;color:var(--muted);font-size:15px}.decision-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.decision-card,.tool-card,.comparison-card,.guide-card{background:#fff;border:1px solid #e2eaf1;border-radius:14px;box-shadow:0 5px 16px rgba(13,51,83,.055);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}.decision-card:hover,.tool-card:hover,.comparison-card:hover,.guide-card:hover{transform:translateY(-4px);box-shadow:0 15px 34px rgba(13,51,83,.11);border-color:#c7dff4}.decision-card{padding:21px 15px;text-align:center;min-height:160px;display:flex;flex-direction:column;align-items:center}.card-icon{width:48px;height:48px;border:2px solid var(--blue);border-radius:50%;display:grid;place-items:center;color:var(--blue);font-size:23px;margin-bottom:8px}.decision-card h3{font-size:14px;margin:4px 0}.decision-card p{font-size:12px;color:var(--muted);margin:0 auto 10px;max-width:190px}.arrow-dot{margin-top:auto;width:30px;height:30px;border-radius:50%;background:#edf7ff;color:var(--blue);display:grid;place-items:center;font-weight:900}.tools-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:10px}.tool-card{min-height:92px;padding:14px;display:flex;align-items:center;gap:12px;position:relative}.tool-card .symbol{font-size:30px;line-height:1}.tool-card h3{font-size:12.5px;line-height:1.22;margin:0;padding-right:22px}.tool-card 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5px}.range-track:after{content:"";position:absolute;left:53%;top:50%;width:14px;height:14px;border-radius:50%;background:var(--navy);transform:translate(-50%,-50%)}.range-labels{display:flex;justify-content:space-between;font-size:10px;font-weight:800}.recommend{margin-top:15px;background:#eaf6ff;border-radius:10px;padding:10px;font-size:11px}.bar-row{display:grid;grid-template-columns:110px 1fr 80px;gap:8px;align-items:center;font-size:11px;margin:10px 0}.bar{height:12px;border-radius:4px;background:#e4ebf1;overflow:hidden}.bar i{display:block;height:100%;border-radius:4px;background:var(--blue)}.bar-row:nth-child(3) i{background:var(--orange)}.bar-row:nth-child(4) i{background:var(--green)}.bar-row:nth-child(5) i{background:#8a68e8}.snapshot-actions{display:flex;gap:10px;margin-top:16px}.snapshot-actions .btn{flex:1;padding:10px;font-size:12px}.comparison-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.comparison-card{text-align:center;padding:14px 16px 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/* inner pages */.page-hero{background:linear-gradient(135deg,#071f38,#0d4777);color:#fff;padding:70px 0 56px}.page-hero h1{font-size:clamp(38px,5vw,64px);line-height:1.04;margin:0 0 12px;letter-spacing:-1.8px}.page-hero p{font-size:18px;max-width:760px;color:#dbeaf6}.content{padding:42px 0}.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:35px}.article h2{font-size:30px;color:var(--navy);margin:36px 0 10px}.article h3{color:var(--navy)}.article p,.article li{color:#405469}.callout{background:#edf8ff;border-left:4px solid var(--blue);border-radius:10px;padding:16px 18px;margin:20px 0}.source-list{font-size:13px;color:#586b7f}.source-list a{color:var(--blue);text-decoration:underline}.side-card{position:sticky;top:100px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:14px;padding:18px}.side-card h3{margin-top:0}.side-card a{display:block;padding:8px 0;border-bottom:1px solid #edf2f6;color:#33506b;font-size:13px}.tool-shell{max-width:950px;margin:-40px auto 0;position:relative;z-index:5}.tool-shell .calc-card{padding:26px}.tool-shell .calc-card h2{font-size:24px}.tool-shell .result-strip{margin-top:18px}.tool-note{font-size:12px;color:#65778a}.seo-table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}.seo-table th,.seo-table td{border:1px solid #dde6ee;padding:10px;text-align:left}.seo-table th{background:#f2f8fc;color:#153b60}.result-panel{margin-top:16px;padding:16px;border-radius:12px;background:#f4f9fd;border:1px solid #dce9f3}.result-panel h3{margin-top:0}.metric-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.metric{background:#fff;border:1px solid #e1e9f0;border-radius:10px;padding:12px}.metric small{display:block;color:var(--muted)}.metric strong{font-size:22px;color:var(--navy)}
@media(max-width:1100px){.main-nav{display:none;position:absolute;left:20px;right:20px;top:76px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.main-nav.open{display:flex}.menu-toggle{display:block;margin-left:auto}.search-btn{font-size:24px}.nav-cta{display:none}.hero-grid{grid-template-columns:1fr}.hero{background-position:65% center}.hero:before{background:rgba(3,18,31,.73)}.hero-copy{max-width:780px}.calc-card{max-width:680px}.trust-row{grid-template-columns:repeat(5,1fr)}.decision-grid{grid-template-columns:repeat(3,1fr)}.tools-grid{grid-template-columns:repeat(3,1fr)}.snapshot{grid-template-columns:1fr 1fr}.comparison-grid{grid-template-columns:repeat(2,1fr)}.guides-grid{grid-template-columns:repeat(2,1fr)}.method-wrap{grid-template-columns:1fr}.content-grid{grid-template-columns:1fr}.side-card{position:static}.footer-grid{grid-template-columns:2fr 1fr 1fr}.footer-grid>div:last-child{grid-column:2/4}}
@media(max-width:700px){.container{width:min(100% - 28px,var(--max))}.nav-wrap{width:calc(100% - 24px);height:70px}.brand strong{font-size:18px}.brand-mark{width:36px}.search-btn{display:none}.hero-grid{padding:38px 0}.hero h1{font-size:42px;letter-spacing:-1.4px}.hero .lead{font-size:17px}.trust-row{grid-template-columns:1fr 1fr;gap:11px}.trust-mini:last-child{grid-column:1/-1}.calc-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.trust-strip .container{grid-template-columns:1fr 1fr}.trust-strip span:last-child{grid-column:1/-1}.decision-grid,.tools-grid,.comparison-grid,.guides-grid{grid-template-columns:1fr 1fr}.snapshot{grid-template-columns:1fr}.snapshot-card.image{height:220px}.method-band{padding:30px 0}.steps{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}.footer-grid>div:last-child{grid-column:auto}.footer-bottom{flex-direction:column}.metric-grid{grid-template-columns:1fr}.page-hero{padding:50px 0}.page-hero h1{font-size:40px}.tool-shell{margin:-25px 14px 0}.guide-card{grid-template-columns:78px 1fr}}
@media(max-width:430px){.decision-grid,.tools-grid,.comparison-grid,.guides-grid{grid-template-columns:1fr}.result-item strong{font-size:16px}.hero h1{font-size:37px}.hero-actions .btn{width:100%}.trust-row{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr}.footer-grid>div:last-child{grid-column:auto}.bar-row{grid-template-columns:90px 1fr 70px}.section h2,.section-title{font-size:26px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.reveal{opacity:1;transform:none;transition:none}.btn,.decision-card,.tool-card,.comparison-card,.guide-card{transition:none}}