@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=IBM+Plex+Mono:wght@400;500;600&display=swap");:root{--primary:#0f5b78;--primary-dark:#0a4a62;--primary-light:#e6f1f5;--accent:#2fa3b7;--accent-soft:#d4eef3;--text:#1f2d3d;--text-secondary:#4a6375;--text-muted:#7b8fa0;--bg:#f7fafc;--bg-alt:#edf3f6;--card:#fff;--border:#d9e2ec;--border-light:#e8eff5;--shadow-xs:0 1px 2px rgba(15,91,120,.04);--shadow-sm:0 1px 4px rgba(15,91,120,.06),0 1px 2px rgba(15,91,120,.04);--shadow-md:0 4px 16px rgba(15,91,120,.07),0 2px 4px rgba(15,91,120,.04);--shadow-lg:0 8px 32px rgba(15,91,120,.09),0 4px 8px rgba(15,91,120,.04);--radius-sm:8px;--radius-md:14px;--radius-lg:20px;--ease:cubic-bezier(0.4,0,0.2,1);--duration:0.28s;--max-width:1180px;--narrow-width:880px}*,:after,:before{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;font-family:IBM Plex Sans,-apple-system,BlinkMacSystemFont,PingFang SC,Noto Sans SC,Microsoft YaHei,sans-serif;color:var(--text);background:var(--bg);line-height:1.75;font-size:16px}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}button{font:inherit}.container{width:min(var(--max-width),calc(100% - 48px));margin:0 auto}.narrow{width:min(var(--narrow-width),calc(100% - 48px));margin:0 auto}.header{position:-webkit-sticky;position:sticky;top:0;z-index:100;background:rgba(247,250,252,.88);backdrop-filter:blur(12px) saturate(1.6);-webkit-backdrop-filter:blur(12px) saturate(1.6);border-bottom:1px solid var(--border-light);transition:box-shadow var(--duration) var(--ease)}.header:hover{box-shadow:var(--shadow-xs)}.headerInner{min-height:64px;display:flex;justify-content:space-between;align-items:center;gap:24px}.brand{font-weight:700;font-size:15px;color:var(--primary);letter-spacing:.02em;white-space:nowrap;position:relative}.brand:before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-right:8px;vertical-align:middle;position:relative;top:-1px}.nav{display:flex;gap:6px;flex-wrap:wrap;font-size:14px;font-weight:500}.nav a{padding:6px 12px;border-radius:var(--radius-sm);color:var(--text-secondary);transition:color var(--duration) var(--ease),background var(--duration) var(--ease);white-space:nowrap}.nav a.active,.nav a:hover{color:var(--primary);background:var(--primary-light)}.nav a.active{font-weight:600}.menuBtn{display:none;background:none;border:none;padding:8px;cursor:pointer;color:var(--text);border-radius:var(--radius-sm);transition:background var(--duration) var(--ease)}.menuBtn:hover{background:var(--primary-light)}.menuBtn svg{display:block}h1,h2,h3,h4{font-weight:600;color:var(--text);line-height:1.25}h1{font-size:clamp(30px,3.6vw,46px);line-height:1.2;margin:0 0 20px;letter-spacing:-.01em}h2{font-size:clamp(24px,2.8vw,34px);margin:0 0 16px;letter-spacing:-.005em}h2:after{content:"";display:block;width:40px;height:3px;background:var(--accent);border-radius:2px;margin-top:14px}h3{font-size:19px;line-height:1.4;margin:0 0 8px}.intro,.lead{font-size:18px;color:var(--text-secondary);line-height:1.8;max-width:720px}.eyebrow{color:var(--accent);font-weight:600;font-size:13px;letter-spacing:.06em;text-transform:uppercase;margin:0 0 12px;font-family:IBM Plex Sans,sans-serif}.note{color:var(--text-muted);font-size:14px;line-height:1.7}.hero{padding:100px 0 72px;position:relative;overflow:hidden}.hero:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(ellipse 80% 60% at 20% 40%,rgba(47,163,183,.04),transparent),radial-gradient(ellipse 60% 50% at 80% 60%,rgba(15,91,120,.03),transparent);pointer-events:none}.hero .container{position:relative;z-index:1}.heroGrid{display:grid;grid-gap:40px;gap:40px;grid-template-columns:1.3fr 1fr;align-items:start}.heroContent h1{margin-bottom:18px}.heroContent .lead{margin-bottom:0}.heroAside{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-md);position:relative}.heroAside:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--primary),var(--accent));border-radius:var(--radius-lg) var(--radius-lg) 0 0}.heroAside h3{color:var(--primary);margin-bottom:14px}.heroAside ol{margin:0;padding-left:0;list-style:none;counter-reset:step}.heroAside ol li{counter-increment:step;padding:10px 0 10px 40px;position:relative;border-bottom:1px solid var(--border-light);font-size:15px;color:var(--text-secondary)}.heroAside ol li:last-child{border-bottom:none}.heroAside ol li:before{content:counter(step);position:absolute;left:0;top:10px;width:26px;height:26px;border-radius:8px;background:var(--primary-light);color:var(--primary);font-weight:600;font-size:13px;display:flex;align-items:center;justify-content:center;font-family:IBM Plex Mono,monospace}.buttonRow{display:flex;gap:10px;flex-wrap:wrap;margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:10px;font-weight:600;font-size:15px;border:none;cursor:pointer;transition:all var(--duration) var(--ease);white-space:nowrap}.btnPrimary{background:var(--primary);color:#fff;box-shadow:0 2px 8px rgba(15,91,120,.2)}.btnPrimary:hover{background:var(--primary-dark);box-shadow:0 4px 16px rgba(15,91,120,.28);transform:translateY(-1px)}.btnSecondary{background:var(--card);color:var(--primary);border:1px solid var(--border)}.btnSecondary:hover{border-color:var(--accent);color:var(--primary-dark);background:var(--primary-light)}.section{padding:80px 0}.sectionAlt{background:var(--bg-alt);position:relative}.sectionAlt:before{top:0}.sectionAlt:after,.sectionAlt:before{content:"";position:absolute;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--border),transparent)}.sectionAlt:after{bottom:0}.section .intro{margin-bottom:36px}.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-md);padding:24px;transition:box-shadow var(--duration) var(--ease),transform var(--duration) var(--ease),border-color var(--duration) var(--ease)}.card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:var(--border)}.card h3{color:var(--primary)}.card p{color:var(--text-secondary);margin:0;font-size:15px;line-height:1.7}.cardGrid{display:grid;grid-gap:18px;gap:18px}.cardGrid.four{grid-template-columns:repeat(4,1fr)}.cardGrid.three{grid-template-columns:repeat(3,1fr)}.cardGrid.two{grid-template-columns:repeat(2,1fr)}.card[data-index]:before{content:attr(data-index);display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:8px;background:var(--primary-light);color:var(--primary);font-weight:600;font-size:13px;font-family:IBM Plex Mono,monospace;margin-bottom:12px}.compareGrid{display:grid;grid-gap:18px;gap:18px;grid-template-columns:repeat(2,1fr)}.compareActive{border-color:var(--accent);border-width:2px;position:relative}.compareActive:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),var(--primary));border-radius:var(--radius-md) var(--radius-md) 0 0}.matrix{width:100%;border-collapse:separate;border-spacing:0;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm)}.matrix td,.matrix th{padding:14px 18px;text-align:left;border-bottom:1px solid var(--border-light);font-size:15px}.matrix th{background:var(--primary-light);color:var(--primary);font-weight:600;font-size:14px;letter-spacing:.02em}.matrix tr:last-child td{border-bottom:none}.matrix tbody tr{transition:background var(--duration) var(--ease)}.matrix tbody tr:hover{background:rgba(47,163,183,.04)}.twoCol{display:grid;grid-gap:36px;gap:36px;grid-template-columns:1.2fr 1fr;align-items:start}.stack{display:grid;grid-gap:10px;gap:10px}.stack>div{background:var(--card);border:1px solid var(--border);border-left:4px solid var(--accent);border-radius:0 var(--radius-md) var(--radius-md) 0;padding:14px 18px;font-size:15px;color:var(--text-secondary);transition:border-left-color var(--duration) var(--ease),box-shadow var(--duration) var(--ease)}.stack>div:hover{border-left-color:var(--primary);box-shadow:var(--shadow-sm)}.stepFlow{display:grid;grid-gap:16px;gap:16px}.stepFlowItem{display:grid;grid-template-columns:48px 1fr;grid-gap:16px;gap:16px;align-items:start}.stepFlowBadge{width:40px;height:40px;border-radius:10px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:16px;flex-shrink:0;font-family:IBM Plex Mono,monospace;box-shadow:0 2px 6px rgba(15,91,120,.15)}.stepFlowItem h3{margin:2px 0 4px;color:var(--text)}.stepFlowItem p{margin:0;color:var(--text-secondary);font-size:15px}.stepFlowItem:not(:last-child){position:relative;padding-bottom:4px}.stepFlowItem:not(:last-child):after{content:"";position:absolute;left:19px;top:44px;bottom:-12px;width:2px;background:var(--border)}.accordion{display:grid;grid-gap:8px;gap:8px}.accordionItem{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;transition:border-color var(--duration) var(--ease),box-shadow var(--duration) var(--ease)}.accordionItem:hover{border-color:var(--accent-soft)}.accordionTrigger{width:100%;background:none;border:none;padding:18px 22px;font:inherit;font-size:16px;font-weight:600;color:var(--text);text-align:left;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;transition:color var(--duration) var(--ease)}.accordionTrigger:hover{color:var(--primary)}.accordionTrigger:after{content:"+";font-size:20px;color:var(--accent);transition:transform var(--duration) var(--ease);flex-shrink:0;width:28px;height:28px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:var(--primary-light);font-weight:400}.accordionTrigger[aria-expanded=true]:after{content:"\2212";background:var(--accent-soft);transform:rotate(180deg)}.accordionContent{padding:0 22px 20px;color:var(--text-secondary);line-height:1.8;font-size:15px}.accordionContent p{margin:0}.timeline{display:grid;grid-gap:0;gap:0;position:relative;padding-left:28px}.timeline:before{content:"";position:absolute;left:15px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,var(--accent),var(--primary));border-radius:1px}.timelineItem{display:grid;grid-template-columns:1fr;grid-gap:0;gap:0;padding:18px 0 18px 32px;position:relative}.timelineItem:before{content:"";position:absolute;left:-21px;top:26px;width:12px;height:12px;border-radius:50%;background:var(--card);border:3px solid var(--accent);z-index:1}.timelineItem:first-child:before{border-color:var(--primary);background:var(--primary-light)}.timelineBadge{display:inline-flex;align-items:center;padding:3px 12px;background:var(--primary);color:#fff;border-radius:20px;font-weight:600;font-size:13px;font-family:IBM Plex Mono,monospace;margin-bottom:8px;width:-moz-fit-content;width:fit-content}.timelineItem h3{margin-bottom:6px}.timelineItem p{margin:0;color:var(--text-secondary);font-size:15px;line-height:1.7}.diagramBlock{margin:24px 0;text-align:center}.diagramBlock img{max-width:100%;height:auto;border-radius:var(--radius-md);border:1px solid var(--border);box-shadow:var(--shadow-sm)}.diagramCaption{margin-top:12px;font-style:italic}.diagramCaption,.diagramPlaceholder{font-size:14px;color:var(--text-muted)}.diagramPlaceholder{background:var(--primary-light);border:2px dashed var(--border);border-radius:var(--radius-md);padding:48px 32px;text-align:center}.footer{padding:40px 0 56px;border-top:1px solid var(--border);background:var(--card)}.footerInner{display:flex;justify-content:space-between;align-items:flex-start;gap:24px}.footerInner strong{font-size:15px;color:var(--primary);display:block;margin-bottom:6px}.footerInner .note{margin:0}.footerRight{font-size:13px;color:var(--text-muted);text-align:right}.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s var(--ease),transform .6s var(--ease)}.reveal.visible{opacity:1;transform:translateY(0)}.reveal-stagger>.reveal:first-child{transition-delay:0s}.reveal-stagger>.reveal:nth-child(2){transition-delay:.08s}.reveal-stagger>.reveal:nth-child(3){transition-delay:.16s}.reveal-stagger>.reveal:nth-child(4){transition-delay:.24s}.reveal-stagger>.reveal:nth-child(5){transition-delay:.32s}.pageNav{display:flex;justify-content:space-between;gap:18px;padding:40px 0 0;border-top:1px solid var(--border-light);margin-top:48px}.pageNavLink{display:flex;flex-direction:column;gap:4px;padding:16px 20px;border:1px solid var(--border);border-radius:var(--radius-md);transition:border-color var(--duration) var(--ease),box-shadow var(--duration) var(--ease);max-width:280px}.pageNavLink:hover{border-color:var(--accent);box-shadow:var(--shadow-sm)}.pageNavLink .pageNavLabel{font-size:12px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.08em;font-weight:500}.pageNavLink .pageNavTitle{font-size:15px;font-weight:600;color:var(--primary)}.pageNavNext{margin-left:auto;text-align:right}.pageWithSidebar{display:grid;grid-template-columns:200px 1fr;grid-gap:48px;gap:48px;align-items:start}.sidebar{position:-webkit-sticky;position:sticky;top:84px;padding:20px 0}.sidebar nav{display:flex;flex-direction:column;gap:4px}.sidebar nav a{padding:8px 14px;border-radius:var(--radius-sm);font-size:14px;color:var(--text-muted);border-left:2px solid transparent;transition:all var(--duration) var(--ease)}.sidebar nav a:hover{color:var(--primary);background:var(--primary-light);border-left-color:var(--accent)}.floatingCta{position:fixed;bottom:28px;right:28px;z-index:90}.floatingCta .btn{box-shadow:var(--shadow-lg);font-size:14px;padding:0 18px;min-height:42px}.textCenter{text-align:center}.mt-0{margin-top:0}.mt-sm{margin-top:16px}.mt-md{margin-top:32px}.mb-0{margin-bottom:0}@media (max-width:960px){.cardGrid.four,.cardGrid.three,.cardGrid.two,.compareGrid,.heroGrid,.pageWithSidebar,.twoCol{grid-template-columns:1fr}.nav,.sidebar{display:none}.menuBtn{display:block}.hero{padding:80px 0 56px}.section{padding:60px 0}h1{font-size:clamp(26px,6vw,34px)}h2{font-size:clamp(22px,5vw,28px)}.heroAside{order:-1}.pageNav{flex-direction:column}.pageNavLink{max-width:100%}.pageNavNext{margin-left:0;text-align:left}.footerInner{flex-direction:column}.footerRight{text-align:left}.floatingCta{bottom:16px;right:16px}}.mobileNav{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(247,250,252,.96);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);z-index:99;padding:80px 24px 24px;flex-direction:column;gap:4px}.mobileNav.open{display:flex}.mobileNav a{padding:14px 18px;font-size:17px;font-weight:500;color:var(--text);border-radius:var(--radius-md);transition:background var(--duration) var(--ease)}.mobileNav a:hover{background:var(--primary-light);color:var(--primary)}.mobileNavClose{position:absolute;top:16px;right:16px;background:none;border:none;padding:8px;cursor:pointer;color:var(--text);font-size:24px;border-radius:var(--radius-sm)}.mobileNavClose:hover{background:var(--primary-light)}@media print{.buttonRow,.floatingCta,.footer,.header,.menuBtn{display:none}.hero,.section{padding:24px 0}body{font-size:12pt;line-height:1.6}}