:root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:#15283e;background:#f7f9fc;font-synthesis:none;text-rendering:optimizeLegibility}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;overflow-x:clip;line-height:1.65}
button,input{font:inherit}
a{color:inherit;text-decoration:none}
a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #4b9dff;outline-offset:3px}
.skip-link{position:absolute;left:16px;top:-80px;z-index:20;background:#fff;color:#075eb9;padding:8px 14px;border-radius:8px}
.skip-link:focus{top:12px}
.shell{width:min(1180px,calc(100% - 48px));margin-inline:auto}
.site-header{background:#fff;border-bottom:1px solid #e3eaf2}
.header-inner{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.site-brand{display:flex;align-items:center;gap:10px;flex:none;color:#173354;font-size:19px;font-weight:800;line-height:1.13;letter-spacing:.01em}
.site-brand small{display:block;margin-top:4px;color:#92a2b5;font-size:9px;letter-spacing:.18em}
.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px;color:white;background:#007cf5;font-size:22px;letter-spacing:-.12em;padding-right:4px}
.main-nav{display:flex;align-items:center;gap:22px;font-size:14px;font-weight:650;white-space:nowrap}
.main-nav a{padding:8px 0;color:#4c6078}
.main-nav a:hover,.main-nav a[aria-current]{color:#006fe0}
.main-nav a[aria-current]{box-shadow:inset 0 -2px #007cf5}
.hero{display:grid;grid-template-columns:minmax(0,1.24fr) minmax(320px,.76fr);align-items:center;gap:64px;padding-block:86px 88px}
.eyebrow,.section-label,.note-kicker{display:block;color:#0877e7;font-size:12px;font-weight:800;letter-spacing:.12em}
.eyebrow{margin:0 0 20px}
h1,h2,h3,p{margin-top:0}
.hero h1{font-size:clamp(42px,5.3vw,72px);letter-spacing:-.045em;line-height:1.13;margin-bottom:22px}
.hero h1 em{font-style:normal;color:#007cf5}
.hero-lede{max-width:610px;color:#54687e;font-size:18px;line-height:1.82;margin-bottom:30px}
.hero-actions,.closing-actions{display:flex;flex-wrap:wrap;gap:12px}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 19px;border-radius:10px;font-size:14px;font-weight:800;transition:transform .15s ease,background .15s ease}
.button:hover{transform:translateY(-2px)}
.button.primary{color:#fff;background:#007cf5}
.button.primary:hover{background:#0067d0}
.button.outline{color:#076ac8;border:1px solid #c5d8ee;background:#fff}
.button.outline:hover{background:#ebf5ff}
.hero-note{padding:30px 30px 25px;background:#102b4a;border-radius:22px;color:#fff;box-shadow:0 24px 60px rgba(12,47,86,.15)}
.note-kicker{color:#75c2ff}
.hero-note ol{list-style:none;padding:0;margin:14px 0 19px;counter-reset:none}
.hero-note li{display:flex;flex-direction:column;gap:2px;padding:15px 0;border-bottom:1px solid #36516e}
.hero-note li strong{font-size:18px}
.hero-note li span{color:#bdd0e2;font-size:14px}
.hero-note p{color:#adbed0;font-size:12px;line-height:1.7;margin:0}
.topic-strip{background:#eaf3fc;border-block:1px solid #dce9f6}
.topic-links{display:flex;gap:28px;overflow-x:auto;scrollbar-width:thin;white-space:nowrap;padding-block:13px}
.topic-links a{font-size:13px;font-weight:750;color:#28608e}
.topic-links a:hover{color:#0066c8}
.section{padding-block:84px;scroll-margin-top:20px}
.section-tint{background:#eef4fa}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:32px;margin-bottom:32px}
.section-head h2{font-size:clamp(29px,3.3vw,43px);line-height:1.26;letter-spacing:-.03em;margin:9px 0 0}
.section-head>p{max-width:375px;color:#64778b;font-size:14px;line-height:1.82;margin-bottom:3px}
.roadmap{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.roadmap article{display:flex;gap:20px;min-height:175px;padding:24px;background:#fff;border:1px solid #e1e9f2;border-radius:15px}
.roadmap article:last-child{grid-column:span 2}
.step-no{color:#0877e7;font-size:27px;font-weight:850;line-height:1;letter-spacing:-.04em}
.roadmap h3{font-size:19px;margin-bottom:8px}
.roadmap p{font-size:14px;color:#607389;line-height:1.75;margin-bottom:10px}
.roadmap small,.roadmap a{color:#0072dd;font-weight:750;font-size:13px}
.roadmap a:hover{text-decoration:underline}
.knowledge-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.knowledge-grid article{padding:28px 28px 25px;border-radius:16px;background:#fff;border:1px solid #dfe8f2}
.card-index{display:grid;place-items:center;width:31px;height:31px;background:#e8f3ff;color:#0075dd;border-radius:8px;font-size:14px;font-weight:800;margin-bottom:16px}
.knowledge-grid h3{font-size:19px;line-height:1.4;margin-bottom:10px}
.knowledge-grid p{font-size:14px;color:#5d7085;line-height:1.85;margin-bottom:16px}
.knowledge-grid a{font-size:13px;font-weight:800;color:#0072df}
.knowledge-grid a:hover{text-decoration:underline}
.reading-rule{display:flex;align-items:center;flex-wrap:wrap;gap:10px 20px;margin-top:16px;padding:18px 22px;border-radius:13px;background:#dcecff;color:#214568;font-size:14px}
.reading-rule strong{color:#006cce}
.reading-rule p{width:100%;font-size:12px;color:#60758a;margin:0}
.budget-layout{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.budget-formula{display:flex;flex-direction:column;align-items:flex-start;padding:34px;border-radius:17px;background:#0d304f;color:#fff}
.budget-formula>span{color:#86c9ff;font-size:12px;font-weight:800;letter-spacing:.1em}
.budget-formula p{font-size:16px;line-height:1.9;margin:17px 0 0}
.budget-formula p strong{font-size:20px}
.budget-formula p+p{font-size:14px;color:#c4d6e6;margin-top:14px}
.budget-formula .button{margin-top:auto;transform:none}
.budget-list{padding:28px 32px;border:1px solid #e2eaf3;border-radius:17px;background:#fff}
.budget-list h3{font-size:19px;margin-bottom:13px}
.budget-list ul{list-style:none;padding:0;margin:0}
.budget-list li{display:grid;grid-template-columns:100px 1fr;gap:12px;border-top:1px solid #eef2f6;padding:12px 0;font-size:13px}
.budget-list li strong{color:#24435f}
.budget-list li span{color:#617589}
.fine-print{color:#728398;font-size:12px;line-height:1.75;margin:17px 0 0}
.energy-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.energy-grid article{padding:29px;border:1px solid #dfe8f2;border-radius:16px;background:#fff}
.energy-icon{font-size:13px;font-weight:850;color:#006fd6;margin-bottom:27px}
.energy-grid h3{font-size:19px;margin-bottom:10px}
.energy-grid p{color:#5d7085;font-size:14px;line-height:1.82;margin-bottom:0}
.example-strip{display:grid;grid-template-columns:210px 1fr;gap:18px;padding:20px 23px;margin-top:16px;border-left:4px solid #007cf5;background:#fff;border-radius:0 12px 12px 0;font-size:13px;color:#5e7186}
.example-strip strong{color:#173a60}
.checklist-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.checklist-grid fieldset{border:1px solid #e0e9f2;border-radius:16px;background:#fff;margin:0;padding:28px 26px}
.checklist-grid legend{display:block;float:left;width:100%;margin-bottom:16px;font-size:18px;font-weight:800}
.checklist-grid legend span{display:block;color:#0877e7;font-size:13px;margin-bottom:4px}
.checklist-grid label{clear:both;display:flex;align-items:flex-start;gap:9px;padding:10px 0;border-top:1px solid #eef2f6;color:#5d7185;font-size:13px;line-height:1.7;cursor:pointer}
.checklist-grid input{width:16px;height:16px;flex:none;accent-color:#007cf5;margin:3px 0 0}
.model-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.model-grid a{display:flex;flex-direction:column;min-height:128px;padding:18px 21px;border-radius:12px;border:1px solid #dfebf5;background:#fff;transition:transform .15s ease,border-color .15s ease,box-shadow .15s ease}
.model-grid a:hover{transform:translateY(-3px);border-color:#8abdf1;box-shadow:0 9px 25px rgba(29,93,152,.09)}
.model-grid span{font-size:11px;color:#66839b;font-weight:700}
.model-grid strong{font-size:19px;margin:3px 0 5px;color:#183654}
.model-grid small{font-size:12px;color:#60768c;line-height:1.6}
.faq-section{max-width:940px}
.faq-list{display:grid;gap:9px}
.faq-list details{border-radius:12px;border:1px solid #e2e9f0;background:#fff;padding:0 21px}
.faq-list summary{list-style:none;cursor:pointer;padding:18px 20px 18px 0;font-weight:800;position:relative}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary:after{content:"+";position:absolute;right:0;top:15px;color:#0877e7;font-size:22px;font-weight:400}
.faq-list details[open] summary:after{content:"−"}
.faq-list p{border-top:1px solid #edf1f5;color:#64778a;font-size:14px;line-height:1.85;margin:0;padding:14px 0 20px}
.closing{display:flex;align-items:center;justify-content:space-between;gap:32px;padding:35px 40px;margin-bottom:70px;border-radius:18px;background:#dcecff}
.closing h2{font-size:27px;line-height:1.3;margin:7px 0}
.closing p{color:#5a6f83;font-size:14px;margin:0}
.closing-actions{justify-content:flex-end;flex:none}
.site-footer{background:#0c2845;color:#fff;padding:38px 0}
.footer-inner{display:grid;grid-template-columns:1.5fr 1fr;gap:20px 48px}
.footer-brand{font-size:18px;font-weight:800}
.site-footer p{font-size:12px;color:#a9bed1;line-height:1.8;max-width:440px;margin:7px 0 0}
.site-footer nav{display:flex;gap:8px 20px;flex-wrap:wrap;align-content:start;justify-content:end;font-size:12px;color:#d1dfeb}
.site-footer a:hover{text-decoration:underline}
.site-footer small{font-size:11px;color:#8ba4ba;grid-column:1/-1}
@media(max-width:900px){.header-inner{align-items:flex-start;flex-direction:column;gap:8px;padding-block:14px}.main-nav{width:100%;overflow-x:auto;gap:19px;padding-bottom:3px}.hero{grid-template-columns:1fr;gap:30px;padding-block:62px}.hero-note{max-width:630px}.section-head{align-items:start;flex-direction:column;gap:9px}.section-head>p{max-width:640px}.checklist-grid,.model-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.closing{flex-direction:column;align-items:flex-start}.closing-actions{justify-content:start}}
@media(max-width:640px){.shell{width:min(100% - 32px,1180px)}.site-brand{font-size:17px}.brand-mark{width:34px;height:34px}.main-nav{font-size:13px;gap:17px}.hero{padding-block:45px 51px}.hero h1{font-size:39px}.hero-lede{font-size:15px}.hero-note{padding:22px}.section{padding-block:59px}.section-head{margin-bottom:24px}.section-head h2{font-size:28px}.roadmap,.knowledge-grid,.budget-layout,.energy-grid,.checklist-grid,.model-grid{grid-template-columns:1fr}.roadmap article{min-height:auto;padding:21px}.roadmap article:last-child{grid-column:auto}.knowledge-grid article,.energy-grid article{padding:22px}.budget-formula,.budget-list{padding:24px}.budget-formula .button{margin-top:22px}.budget-list li{grid-template-columns:90px 1fr}.example-strip{grid-template-columns:1fr;gap:5px}.checklist-grid fieldset{padding:22px}.closing{padding:27px 23px;margin-bottom:46px}.closing h2{font-size:24px}.closing-actions{width:100%}.closing-actions .button{flex:1 1 100%;}.footer-inner{grid-template-columns:1fr}.site-footer nav{justify-content:start}.site-footer small{grid-column:auto}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button,.model-grid a{transition:none}}