:root{--navy:#071a3d;--ink:#101828;--muted:#667085;--line:#e4e9f2;--blue:#155eef;--blue-dark:#0b3ca7;--cyan:#16b8d4;--soft:#f5f8ff;--card:#fff;--success:#067647;--shadow:0 18px 50px rgba(23,43,77,.1);--radius:20px;--max:1220px}
*{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:1.7;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button,input,select,textarea{font:inherit}
button,a{-webkit-tap-highlight-color:transparent}
:focus-visible{outline:3px solid rgba(21,94,239,.3);outline-offset:3px}
.wrap{width:min(calc(100% - 40px),var(--max));margin-inline:auto}
.topbar{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);backdrop-filter:blur(18px);border-bottom:1px solid rgba(228,233,242,.85)}
.nav{min-height:78px;display:flex;align-items:center;gap:24px}
.brand{position:relative;min-height:44px;padding-left:52px;display:inline-flex;flex-direction:column;justify-content:center;color:var(--navy);font-size:1.28rem;font-weight:900;letter-spacing:-.04em;line-height:1.05;white-space:nowrap}
.brand::before{content:"";position:absolute;left:0;top:50%;width:42px;height:42px;transform:translateY(-50%);background:url('/assets/brand-mark.webp') center/contain no-repeat}
.brand small{display:block;margin-top:5px;color:var(--muted);font-size:.61rem;font-weight:700;letter-spacing:.035em}
.menu{margin-left:auto;display:flex;align-items:center;gap:20px;font-size:.9rem;font-weight:720}
.menu a{padding:8px 0;color:#344054;transition:color .18s ease}
.menu a:hover,.menu a.active{color:var(--blue)}
.menu .nav-ai{padding:9px 13px;color:var(--blue);background:#eef4ff;border:1px solid #d8e5ff;border-radius:10px}
.mobile{display:none;margin-left:auto;border:0;background:#f2f4f7;border-radius:10px;width:42px;height:42px;color:var(--ink);font-size:1.35rem;cursor:pointer}
.hero{position:relative;overflow:hidden;background:radial-gradient(circle at 8% 5%,rgba(34,211,238,.24),transparent 28%),linear-gradient(135deg,#071a3d 0%,#0b3ca7 58%,#155eef 100%);color:#fff}
.hero::after{content:"";position:absolute;inset:auto -15% -48% 30%;height:420px;border-radius:50%;background:rgba(255,255,255,.07);filter:blur(2px)}
.hero-grid{position:relative;z-index:1;min-height:520px;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(360px,.95fr);align-items:center;gap:68px;padding-block:64px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 11px;border:1px solid rgba(255,255,255,.18);border-radius:999px;background:rgba(255,255,255,.1);font-size:.76rem;font-weight:800;letter-spacing:.03em;text-transform:uppercase}
.hero h1{max-width:800px;margin:18px 0;font-size:clamp(2.7rem,5.6vw,5.2rem);line-height:.98;letter-spacing:-.06em}
.hero p{max-width:680px;margin:0;color:#d9e7ff;font-size:1.08rem}
.searchbar{display:flex;max-width:650px;margin-top:28px;padding:6px;background:#fff;border:1px solid rgba(255,255,255,.38);border-radius:14px;box-shadow:0 16px 44px rgba(0,0,0,.2)}
.searchbar input{min-width:0;flex:1;padding:13px 15px;border:0;outline:0;color:var(--ink);background:transparent}
.searchbar button{border:0;padding:0 22px;border-radius:10px;background:var(--blue);color:#fff;font-weight:850;cursor:pointer}
.hero-visual{position:relative}
.hero-visual::before{content:"";position:absolute;inset:-20px;border:1px solid rgba(255,255,255,.18);border-radius:32px;transform:rotate(3deg)}
.hero-visual img{position:relative;width:100%;aspect-ratio:3/2;object-fit:cover;border:1px solid rgba(255,255,255,.26);border-radius:28px;box-shadow:0 30px 70px rgba(0,0,0,.3);transform:rotate(-2deg)}
.section{padding:72px 0}
.section.alt{background:#f6f8fc;border-block:1px solid #eef1f6}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:28px}
.section h2{margin:0;font-size:clamp(1.75rem,3vw,2.45rem);line-height:1.15;letter-spacing:-.045em}
.section-head p{margin:8px 0 0;color:var(--muted)}
.text-link{flex:none;color:var(--blue);font-weight:800}
.cat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.cat-card,.article-card,.panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--card)}
.cat-card{min-height:205px;padding:22px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.cat-card:hover{transform:translateY(-4px);border-color:#c8d8ff;box-shadow:var(--shadow)}
.cat-icon{width:46px;height:46px;display:grid;place-items:center;border-radius:14px;background:linear-gradient(145deg,#e9f1ff,#f8fbff);color:var(--blue);font-weight:900;box-shadow:inset 0 0 0 1px #dbe7ff}
.cat-card h3{margin:17px 0 6px;font-size:1.02rem;line-height:1.3}
.cat-card p{margin:0;color:var(--muted);font-size:.88rem;line-height:1.58}
.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.article-card{overflow:hidden;transition:transform .2s ease,box-shadow .2s ease}
.article-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.thumb{width:100%;height:174px;object-fit:cover;background:#dce8ff}
.card-body{padding:19px}
.tag{display:inline-flex;padding:5px 9px;border:1px solid #d9e6ff;border-radius:999px;background:#f0f5ff;color:var(--blue-dark);font-size:.7rem;font-weight:850;line-height:1.2}
.card-body h3{margin:11px 0 8px;font-size:1.06rem;line-height:1.38;letter-spacing:-.015em}
.card-body p{display:-webkit-box;overflow:hidden;margin:0 0 15px;color:var(--muted);font-size:.87rem;line-height:1.6;-webkit-line-clamp:3;-webkit-box-orient:vertical}
.meta{color:#7a8494;font-size:.78rem}
.page-hero{padding:52px 0 22px}
.page-hero h1{margin:2px 0 6px;font-size:clamp(2.35rem,4.5vw,4.4rem);line-height:1.05;letter-spacing:-.055em}
.page-hero p{max-width:760px;margin:8px 0 0;color:var(--muted)}
.breadcrumb{padding:24px 0 6px;color:var(--muted);font-size:.82rem}
.breadcrumb a{color:var(--blue);font-weight:650}
.filters{display:grid;grid-template-columns:minmax(0,1fr) 220px 180px;gap:12px;margin:24px 0}
.input,.select{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:11px;background:#fff;color:var(--ink)}
.article-list{display:grid;gap:14px}
.list-row{display:grid;grid-template-columns:190px minmax(0,1fr);gap:19px;padding:13px;border:1px solid var(--line);border-radius:17px;background:#fff;transition:border-color .18s ease,box-shadow .18s ease}
.list-row:hover{border-color:#cbd9f7;box-shadow:0 10px 32px rgba(28,49,86,.07)}
.list-row .thumb{height:124px;border-radius:12px}
.list-row h3{margin:7px 0 4px;font-size:1.06rem;line-height:1.35}
.list-row p{margin:0 0 7px;color:var(--muted);font-size:.88rem;line-height:1.55}
.pager{display:flex;justify-content:center;gap:8px;margin:30px 0}
.pager button{padding:8px 12px;border:1px solid var(--line);border-radius:9px;background:#fff;cursor:pointer}
.pager button.current{border-color:var(--blue);background:var(--blue);color:#fff}
.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 292px;align-items:start;gap:52px}
.article-main{min-width:0}
.article-main h1{margin:10px 0 14px;font-size:clamp(2.2rem,4.6vw,4.35rem);line-height:1.04;letter-spacing:-.055em}
.lead{max-width:850px;color:#475467;font-size:1.13rem;line-height:1.75}
.article-hero-art{width:100%;height:auto;aspect-ratio:16/9;margin:30px 0;border-radius:24px;object-fit:cover;box-shadow:0 18px 52px rgba(15,39,80,.13)}
.article-body{font-size:1.02rem}
.article-body section{scroll-margin-top:100px}
.article-body h2{margin:48px 0 12px;font-size:1.65rem;line-height:1.3;letter-spacing:-.03em}
.article-body p{color:#344054}
.article-body a{color:var(--blue);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.note{margin:26px 0;padding:17px 19px;border:1px solid #dce7ff;border-left:4px solid var(--blue);border-radius:0 13px 13px 0;background:#f1f6ff;color:#29415f}
.toc{position:sticky;top:100px;padding:20px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 12px 36px rgba(19,42,78,.06)}
.toc h3{margin:0 0 12px;font-size:.96rem}
.toc a{display:block;padding:7px 0;border-bottom:1px solid #f0f2f6;color:#475467;font-size:.84rem;line-height:1.45}
.toc a:last-child{border-bottom:0}
.toc a:hover{color:var(--blue)}
.faq{margin-top:48px;padding-top:24px;border-top:1px solid var(--line)}
.faq details{padding:15px 0;border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;font-weight:780}
.related{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:18px}
.related a{padding:16px;border:1px solid var(--line);border-radius:14px;background:#fff}
.related strong{display:block;margin-top:8px;line-height:1.4}
.glossary{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}
.term{padding:18px;border:1px solid var(--line);border-radius:15px}
.term b{color:var(--blue)}
.tool-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.tool{padding:22px;border:1px solid var(--line);border-radius:17px}
.meter{height:10px;overflow:hidden;border-radius:99px;background:#edf0f5}
.meter i{display:block;width:0;height:100%;background:var(--blue)}
.stat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:24px 0}
.stat{padding:20px;border:1px solid var(--line);border-radius:16px}
.stat strong{display:block;color:var(--blue);font-size:1.8rem}
.ask-hero{padding:58px 0 42px;background:linear-gradient(145deg,#f6f9ff,#edf5ff);border-bottom:1px solid #dfe8f8}
.ask-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(340px,.95fr);align-items:center;gap:56px}
.ask-grid h1{margin:10px 0 14px;font-size:clamp(2.6rem,5vw,4.8rem);line-height:1;letter-spacing:-.06em}
.ask-grid p{max-width:700px;color:#475467;font-size:1.06rem}
.ask-visual img{aspect-ratio:3/2;object-fit:cover;border-radius:26px;box-shadow:var(--shadow)}
.ask-panel{max-width:900px;margin:38px auto 0;padding:8px;border:1px solid #ccd9f5;border-radius:17px;background:#fff;box-shadow:0 16px 48px rgba(16,45,94,.12)}
.ask-form{display:flex;gap:8px}
.ask-form textarea{min-height:64px;max-height:180px;flex:1;resize:vertical;padding:14px;border:0;outline:0;background:transparent;line-height:1.5}
.ask-form button{align-self:stretch;border:0;border-radius:12px;padding:0 22px;background:var(--blue);color:#fff;font-weight:850;cursor:pointer}
.ask-note{margin:9px 8px 3px;color:var(--muted);font-size:.78rem}
.answer-wrap{padding:58px 0}
.answer-card{display:none;max-width:900px;margin:auto;padding:28px;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:var(--shadow)}
.answer-card.show{display:block}
.answer-card h2{margin:0 0 12px;letter-spacing:-.035em}
.answer-text{white-space:pre-wrap;color:#344054}
.source-list{display:grid;gap:10px;margin-top:22px}
.source-card{padding:14px 16px;border:1px solid var(--line);border-radius:13px;background:#f9fafb}
.source-card b{display:block;line-height:1.35}
.source-card span{color:var(--muted);font-size:.82rem}
.answer-loading{display:inline-flex;align-items:center;gap:9px;color:var(--blue);font-weight:750}
.answer-loading::before{content:"";width:16px;height:16px;border:2px solid #c7d7ff;border-top-color:var(--blue);border-radius:50%;animation:spin .75s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.footer{margin-top:76px;padding:50px 0;background:var(--navy);color:#d6e1f5}
.footer-grid{display:grid;grid-template-columns:1.35fr repeat(3,1fr);gap:34px}
.footer .brand{color:#fff}
.footer .brand::before{filter:drop-shadow(0 4px 10px rgba(0,0,0,.2))}
.footer p{max-width:380px;color:#b6c5dc;font-size:.9rem}
.footer h4{margin:0 0 12px;color:#fff}
.footer a{display:block;padding:3px 0;color:#b8c7df;font-size:.9rem}
.footer a:hover{color:#fff}
.footer small{display:block;margin-top:14px;color:#8fa2c1}
@media(max-width:1060px){.menu{gap:14px;font-size:.84rem}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.cat-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:900px){.wrap{width:min(calc(100% - 30px),var(--max))}.menu{display:none}.menu.open{position:absolute;top:70px;left:15px;right:15px;display:flex;align-items:stretch;flex-direction:column;gap:4px;padding:16px;border:1px solid var(--line);border-radius:15px;background:#fff;box-shadow:var(--shadow)}.menu.open a{padding:10px 12px}.mobile{display:block}.hero-grid,.ask-grid{grid-template-columns:1fr}.hero-grid{min-height:0;gap:42px;padding-block:54px}.hero-visual{max-width:680px}.cat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.article-shell{grid-template-columns:1fr;gap:26px}.toc{position:static;order:-1}.footer-grid{grid-template-columns:1.2fr 1fr}.filters{grid-template-columns:1fr}.related{grid-template-columns:1fr}.tool-grid{grid-template-columns:1fr}.ask-grid{gap:30px}.ask-visual{max-width:650px}}
@media(max-width:600px){.wrap{width:min(calc(100% - 24px),var(--max))}.nav{min-height:70px}.brand{padding-left:46px;font-size:1.16rem}.brand::before{width:38px;height:38px}.hero-grid{padding-block:44px}.hero h1{font-size:2.85rem}.hero-visual{display:none}.searchbar button{padding:0 15px}.section{padding:52px 0}.section-head{align-items:start;flex-direction:column}.cat-grid,.cards,.glossary,.stat-grid{grid-template-columns:1fr}.list-row{grid-template-columns:105px minmax(0,1fr);gap:12px}.list-row .thumb{height:96px}.list-row p{display:none}.article-main h1{font-size:2.45rem}.article-hero-art{border-radius:16px}.footer-grid{grid-template-columns:1fr}.ask-hero{padding-top:42px}.ask-grid h1{font-size:2.75rem}.ask-visual{display:none}.ask-panel{margin-top:26px}.ask-form{flex-direction:column}.ask-form button{min-height:48px}.answer-card{padding:20px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}