:root{--font-display:"Inter", "Inter Fallback", sans-serif;--font-body:"Source Sans 3", "Source Sans 3 Fallback", sans-serif;--navy:#0E2A6B;--navy-dark:#0A1F4A;--navy-lt:#1B3A8C;--blue:#1E63D7;--blue-soft:#EEF4FF;--cyan:#1FB8E8;--cyan-glow:#7DD3FC;--teal:#0FBFB1;--teal-soft:#E5F7F4;--orange:#F97316;--orange-soft:#FFF7F2;--green:#10B981;--green-bg:#D1FAE5;--green-dark:#065F46;--red:#DC2626;--red-bg:#FEE2E2;--red-dark:#7F1D1D;--yellow:#F59E0B;--yellow-bg:#FEF3C7;--yellow-dark:#78350F;--text:#1A2236;--text-muted:#5A6478;--text-soft:#8189A0;--bg:#F7F9FC;--bg-soft:#FAFBFD;--border:#E5E8EE;--border-soft:#F1F3F7;--r-sm:8px;--r-md:12px;--r-lg:16px;--r-xl:24px;--shadow-sm:0 1px 3px rgba(14,42,107,.06);--shadow-md:0 4px 12px rgba(14,42,107,.08);color-scheme:light}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%}body{font-family:var(--font-body);font-size:16px;line-height:1.65;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}img,svg{max-width:100%;display:block}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer;border:none;background:none}h1,h2,h3,h4,h5,h6{font-family:var(--font-display);font-weight:700;color:var(--navy);letter-spacing:-.4px;line-height:1.25}.site-header{position:sticky;top:0;z-index:50;background:#ffffffeb;backdrop-filter:saturate(180%) blur(10px);-webkit-backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--border-soft)}.hdr-inner{max-width:1200px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px}.hdr-back{display:inline-flex;align-items:center;gap:8px;color:var(--text-muted);font-size:14px;font-weight:500;padding:8px 12px;border-radius:var(--r-sm);transition:background .15s,color .15s}.hdr-back:hover{background:var(--blue-soft);color:var(--navy)}.hdr-brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:800;color:var(--navy);font-size:17px;letter-spacing:-.3px}.hdr-brand-icon{width:32px;height:32px;border-radius:8px;background:linear-gradient(135deg,var(--navy),var(--blue));display:grid;place-items:center;color:#fff}.hdr-brand-cn{color:var(--cyan);font-weight:700}.hdr-tool{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(135deg,var(--cyan),var(--teal));color:#fff;padding:8px 14px;border-radius:var(--r-sm);font-size:13px;font-weight:700;letter-spacing:-.1px;box-shadow:0 2px 8px -2px #1fb8e866;transition:transform .15s,box-shadow .15s}.hdr-tool:hover{transform:translateY(-1px);box-shadow:0 4px 14px -2px #1fb8e880}.hero{background:linear-gradient(135deg,#0e2a6b,#1fb8e8 60%,#0fbfb1);color:#fff;padding:64px 24px 80px;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background-image:radial-gradient(circle at 25% 30%,rgba(255,255,255,.15) 0%,transparent 40%),radial-gradient(circle at 75% 70%,rgba(255,255,255,.1) 0%,transparent 45%);pointer-events:none}.hero-inner{max-width:920px;margin:0 auto;position:relative;z-index:1}.breadcrumb{display:inline-flex;align-items:center;gap:8px;background:#ffffff2e;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border:1px solid rgba(255,255,255,.28);padding:6px 14px;border-radius:999px;font-size:12.5px;font-weight:600;color:#fff;margin-bottom:18px;letter-spacing:.2px}.breadcrumb-sep{opacity:.85;font-size:16px;font-weight:700}.hero h1{color:#fff;font-size:clamp(34px,5vw,52px);font-weight:800;letter-spacing:-1.2px;line-height:1.1;margin-bottom:18px}.hero-lead{font-size:clamp(16px,1.6vw,19px);line-height:1.6;color:#ffffffeb;max-width:680px}main{max-width:920px;margin:0 auto;padding:0 24px}section{padding:56px 0;border-bottom:1px solid var(--border-soft)}section:last-of-type{border-bottom:none}section h2{font-size:clamp(24px,2.8vw,32px);margin-bottom:18px;letter-spacing:-.6px}section h3{font-size:20px;margin:24px 0 10px;letter-spacing:-.3px}section p{margin-bottom:14px;color:var(--text);max-width:720px}section p.lead{font-size:18px;line-height:1.6;color:var(--text);max-width:720px;margin-bottom:20px}.toc{margin-top:-40px;background:#fff;border:1px solid var(--border);border-radius:var(--r-lg);padding:22px 26px;box-shadow:var(--shadow-md);position:relative;z-index:2}.toc-title{font-family:var(--font-display);font-size:11.5px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.8px;margin-bottom:14px}.toc-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:6px 22px;list-style:none}.toc-list a{display:flex;align-items:center;gap:10px;padding:7px 0;font-size:14px;font-weight:500;color:var(--navy);transition:color .15s}.toc-list a:hover{color:var(--blue)}.toc-num{flex-shrink:0;width:22px;height:22px;border-radius:50%;background:var(--blue-soft);color:var(--blue);display:grid;place-items:center;font-family:var(--font-display);font-weight:700;font-size:11px}.method-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:22px 0 8px}.method-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-md);padding:20px;transition:transform .2s,box-shadow .2s}.method-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.method-num{display:inline-block;width:30px;height:30px;border-radius:8px;background:var(--blue-soft);color:var(--blue);font-family:var(--font-display);font-weight:800;font-size:14px;display:grid;place-items:center;margin-bottom:10px}.method-card.highlight{background:linear-gradient(180deg,var(--blue-soft) 0%,#fff 100%);border-color:var(--cyan)}.method-card.highlight .method-num{background:var(--cyan);color:#fff}.method-card h3{font-size:16px;margin:0 0 6px;letter-spacing:-.2px}.method-card-q{font-size:13px;color:var(--text-muted);font-style:italic;line-height:1.5}.method-detail{padding:22px 24px;background:#fff;border:1px solid var(--border);border-radius:var(--r-md);margin:14px 0}.method-detail-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:8px}.method-detail-num{flex-shrink:0;width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;font-family:var(--font-display);font-size:16px;font-weight:800;display:grid;place-items:center}.method-detail h3{margin:0;font-size:18px;letter-spacing:-.2px}.method-detail-q{font-size:14px;color:var(--text-muted);font-style:italic;margin:4px 0 12px;padding-left:14px;border-left:3px solid var(--cyan)}.method-detail p{font-size:15px;margin:0;color:var(--text)}.flow{background:linear-gradient(135deg,#FAFBFD 0%,var(--blue-soft) 100%);border:1px solid var(--border);border-radius:var(--r-lg);padding:32px 28px;margin:24px 0}.flow-title{font-family:var(--font-display);font-size:11.5px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;text-align:center;margin-bottom:24px}.flow-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;align-items:start;position:relative}.flow-step{text-align:center;position:relative}.flow-step-icon{width:56px;height:56px;border-radius:50%;background:#fff;border:2px solid var(--cyan);display:grid;place-items:center;margin:0 auto 10px;font-size:24px;box-shadow:0 4px 12px -2px #1fb8e840;position:relative;z-index:1}.flow-step-icon.accent{background:linear-gradient(135deg,var(--cyan),var(--teal));border-color:transparent}.flow-step-label{font-family:var(--font-display);font-size:13px;font-weight:700;color:var(--navy);letter-spacing:-.1px;margin-bottom:3px}.flow-step-desc{font-size:12px;color:var(--text-muted);line-height:1.5}.flow-step:after{content:"→";position:absolute;top:18px;right:-15px;font-size:20px;color:var(--cyan);font-weight:300}.flow-step:last-child:after{display:none}.callout{display:flex;gap:14px;padding:16px 18px;border-radius:var(--r-md);margin:18px 0;border-left:4px solid var(--blue);background:var(--blue-soft)}.callout-icon{flex-shrink:0;font-size:20px;line-height:1;margin-top:2px}.callout-body{flex:1}.callout-title{font-family:var(--font-display);font-weight:700;color:var(--navy);font-size:14px;margin-bottom:4px;letter-spacing:-.1px}.callout p{font-size:14px;line-height:1.6;color:var(--text);margin:0}.callout.warn{border-color:var(--orange);background:var(--orange-soft)}.callout.warn .callout-title{color:var(--yellow-dark)}.callout.success{border-color:var(--green);background:var(--green-bg)}.callout.success .callout-title{color:var(--green-dark)}.callout.danger{border-color:var(--red);background:var(--red-bg)}.callout.danger .callout-title{color:var(--red-dark)}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:22px 0}.mode-card{background:#fff;border:2px solid var(--border);border-radius:var(--r-lg);padding:22px}.mode-card.quick{border-color:var(--teal);background:linear-gradient(180deg,var(--teal-soft) 0%,#fff 60%)}.mode-card.detailed{border-color:var(--blue);background:linear-gradient(180deg,var(--blue-soft) 0%,#fff 60%)}.mode-tag{display:inline-block;font-family:var(--font-display);font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;padding:4px 10px;border-radius:6px;margin-bottom:10px}.mode-card.quick .mode-tag{background:var(--teal);color:#fff}.mode-card.detailed .mode-tag{background:var(--blue);color:#fff}.mode-card h4{margin:0 0 6px;font-size:17px;color:var(--navy);letter-spacing:-.2px;font-family:var(--font-display)}.mode-card-sub{font-size:13px;color:var(--text-muted);margin-bottom:14px}.mode-card p{font-size:14px;color:var(--text);margin:0;line-height:1.6}.pc-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:18px 0}.pc-card{background:#fff;border:1px solid var(--border);border-radius:var(--r-md);padding:18px 20px}.pc-card.bad{border-left:4px solid var(--red)}.pc-card.good{border-left:4px solid var(--green)}.pc-title{font-family:var(--font-display);font-weight:700;font-size:13px;text-transform:uppercase;letter-spacing:.5px;margin-bottom:10px}.pc-card.bad .pc-title{color:var(--red-dark)}.pc-card.good .pc-title{color:var(--green-dark)}.pc-list{list-style:none;padding:0;margin:0}.pc-list li{padding:5px 0 5px 22px;position:relative;font-size:14px;color:var(--text);line-height:1.5}.pc-card.bad .pc-list li:before{content:"❌";position:absolute;left:0;font-size:13px}.pc-card.good .pc-list li:before{content:"✅";position:absolute;left:0;font-size:13px}.sources-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px;margin:14px 0}.source-card{padding:14px 16px;background:#fff;border:1px solid var(--border);border-radius:var(--r-md);font-size:13.5px;line-height:1.5}.source-card strong{display:block;font-family:var(--font-display);color:var(--navy);font-size:13.5px;letter-spacing:-.1px;margin-bottom:3px}.source-card span{color:var(--text-muted);font-size:12.5px}.cta-section{background:linear-gradient(135deg,var(--navy) 0%,var(--blue) 100%);color:#fff;padding:52px 24px;border-radius:var(--r-xl);text-align:center;margin:32px 0 56px;position:relative;overflow:hidden}.cta-section:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background-image:radial-gradient(circle at 30% 20%,rgba(31,184,232,.25) 0%,transparent 45%),radial-gradient(circle at 70% 80%,rgba(15,191,177,.2) 0%,transparent 45%)}.cta-inner{position:relative;z-index:1;max-width:600px;margin:0 auto}.cta-section h2{color:#fff;margin-bottom:14px;font-size:clamp(22px,2.8vw,30px)}.cta-section p{color:#ffffffe0;margin-bottom:22px;max-width:none}.cta-btn{display:inline-flex;align-items:center;gap:10px;background:#fff;color:var(--navy);padding:13px 26px;border-radius:var(--r-md);font-family:var(--font-display);font-weight:700;font-size:16px;letter-spacing:-.2px;box-shadow:0 8px 22px -6px #0000004d;transition:transform .15s,box-shadow .15s}.cta-btn:hover{transform:translateY(-2px);box-shadow:0 12px 28px -6px #00000059}.cta-btn .arrow{transition:transform .15s}.cta-btn:hover .arrow{transform:translate(3px)}.footer-mini{font-size:12px;color:#ffffff8c;margin-top:8px}@media (max-width:760px){.hero{padding:48px 20px 64px}.hdr-inner{padding:12px 16px}main{padding:0 16px}section{padding:40px 0}.toc{padding:18px 20px;margin-top:-32px}.toc-list{grid-template-columns:1fr;gap:4px}.mode-grid,.pc-grid{grid-template-columns:1fr}.flow-steps{grid-template-columns:1fr;gap:24px}.flow-step:after{content:"↓";top:auto;bottom:-22px;right:auto;left:50%;transform:translate(-50%)}.cta-section{padding:40px 20px}}@media (max-width:480px){.hdr-tool{display:none}.breadcrumb{font-size:11px}.hero h1{font-size:28px}}@media (max-width:640px){main{padding-left:0;padding-right:0}.wrapper{padding-left:16px;padding-right:16px}}