.itb{--ink:#102c4c;--muted:#647b92;--blue:#168df4;--line:#dce7f1;max-width:1240px;margin:auto;padding:48px 24px 64px;color:var(--ink);font-family:Arial,sans-serif;line-height:1.6}.itb *{box-sizing:border-box}.itb a{text-decoration:none;color:inherit}.itb a:focus-visible,.itb button:focus-visible,.itb input:focus-visible{outline:3px solid #168df4;outline-offset:4px}.itb h1,.itb h2,.itb h3{color:var(--ink);font-weight:750;line-height:1.18;letter-spacing:-.7px}.itb-kicker{display:block;color:#0878cc;font-size:11px;font-weight:750;letter-spacing:1.8px;text-transform:uppercase}.itb-masthead{display:flex;justify-content:space-between;align-items:flex-end;gap:35px;padding-bottom:32px;border-bottom:1px solid var(--line)}.itb-masthead h1{font-size:54px;margin:10px 0 14px;letter-spacing:-2px}.itb-masthead p{color:var(--muted);max-width:540px;font-size:16px;margin:0}.itb-search{display:flex;gap:8px;background:#fff;border:1px solid var(--line);padding:7px;border-radius:14px;max-width:100%;min-width:290px}.itb-search input{border:0;background:none;min-width:0;width:100%;padding:8px;color:var(--ink);font:inherit}.itb .itb-button{display:inline-flex;align-items:center;justify-content:center;gap:15px;border:0;border-radius:10px;padding:13px 20px;background:var(--blue);color:white;font-weight:700;font-size:13px;cursor:pointer;white-space:nowrap}.itb .itb-button:hover{background:#0878dc}.itb-nav{display:flex;gap:9px;overflow-x:auto;padding:22px 0 28px;scrollbar-width:thin}.itb-nav a{flex-shrink:0;border:1px solid var(--line);border-radius:30px;padding:9px 17px;background:#fff;font-size:12px;font-weight:700}.itb-nav a[aria-current]{background:var(--ink);border-color:var(--ink);color:white}.itb-feature{display:grid;grid-template-columns:1.25fr 1fr;background:#102d4d;border-radius:24px;overflow:hidden;min-width:0;margin:0 0 40px;box-shadow:0 16px 40px #1537570c}.itb-feature-image{display:block;min-width:0;min-height:350px;overflow:hidden}.itb-feature-image>img{width:100%;height:100%;object-fit:cover}.itb-feature-copy{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;padding:38px;color:#fff}.itb-feature .itb-kicker{color:#78c6ff}.itb-feature h2{font-size:34px;color:white;margin:14px 0 18px}.itb-feature p{color:#bed1e2;font-size:14px;margin:0 0 20px}.itb-feature .itb-meta{color:#b8cee0}.itb-feature .itb-read{color:#fff;margin-top:24px}.itb-section-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin:32px 0 20px}.itb-section-head h2{font-size:26px;margin:0}.itb-section-head span{color:var(--muted);font-size:12px}.itb-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.itb-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;min-width:0;display:flex;flex-direction:column;transition:box-shadow .2s,transform .2s}.itb-card:hover{transform:translateY(-3px);box-shadow:0 12px 28px #15375710}.itb-card-image{display:block;aspect-ratio:1.65;overflow:hidden}.itb-card-image>img{width:100%;height:100%;object-fit:cover}.itb-card-body{padding:24px;display:flex;flex-direction:column;flex:1}.itb-card .itb-kicker{font-size:9px;letter-spacing:1.1px}.itb-card h2{font-size:22px;margin:13px 0}.itb-card h2 a:hover{color:#0878dc}.itb-card p{font-size:13px;color:var(--muted);margin:0 0 20px}.itb-meta{display:flex;gap:16px;flex-wrap:wrap;font-size:11px;color:var(--muted)}.itb-card .itb-meta{margin-top:auto}.itb-read{display:flex;justify-content:space-between;gap:28px;font-size:12px;font-weight:700;color:#0878dc!important;margin-top:20px}.itb-feature .itb-read{color:white!important}.itb-art{position:relative;width:100%;height:100%;min-height:210px;overflow:hidden;background:radial-gradient(circle at 80% 25%,#76d4ff55,transparent 55%),linear-gradient(135deg,#e9f6ff,#bbdfff);display:grid;place-items:center;color:#1269b2}.itb-art-orbit{position:absolute;width:320px;height:320px;border:1px solid #ffffffb0;border-radius:50%;transform:translate(85px,-55px)}.itb-art-orbit:after{content:'';position:absolute;inset:28px;border:1px solid #ffffffc0;border-radius:50%}.itb-art-mark{z-index:1;font-weight:800;font-size:70px;letter-spacing:-7px;line-height:1.4}.itb-art-mark>span{display:block;font-size:9px;letter-spacing:2px;font-weight:700}.itb-art-dot{position:absolute;right:18%;bottom:24%;width:18px;height:18px;background:#168df4;border-radius:50%;box-shadow:0 0 0 10px #ffffff55}.itb-empty{border:1px dashed #b6cce0;background:#fff;padding:40px;border-radius:20px;text-align:center}.itb-empty h2{font-size:25px;margin:0 0 12px}.itb-empty p{color:var(--muted);font-size:14px}.itb-journey{display:flex;align-items:center;justify-content:space-between;gap:24px;background:#e8f4ff;border:1px solid #cce4fa;border-radius:20px;padding:28px;margin:40px 0 0}.itb-journey h2{font-size:23px;margin:0 0 8px}.itb-journey p{margin:0;color:var(--muted);font-size:13px}.itb-pages{display:flex;justify-content:center;gap:8px;align-items:center;flex-wrap:wrap;margin-top:32px}.itb-pages a{padding:9px 15px;background:white;border:1px solid var(--line);border-radius:9px;font-size:13px}.itb-pages [aria-current]{background:var(--blue);color:white;border-color:var(--blue)}.itb-crumb{font-size:12px;color:var(--muted);display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px}.itb-article-head{max-width:920px;margin:0 auto 30px;text-align:center}.itb-article-head h1{font-size:48px;letter-spacing:-1.7px;margin:16px 0 22px;overflow-wrap:anywhere}.itb-article-head .itb-meta{justify-content:center}.itb-deck{font-size:17px;color:var(--muted);max-width:740px;margin:0 auto 23px}.itb-cover{max-height:560px;width:100%;object-fit:cover;display:block;border-radius:22px}.itb-layout{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:48px;align-items:start;margin:40px auto;max-width:1100px}.itb-prose{background:white;border:1px solid var(--line);padding:38px;border-radius:20px;font-size:17px;line-height:1.9;min-width:0;overflow-wrap:anywhere;color:#29445f}.itb-prose>*:first-child{margin-top:0}.itb-prose h2{font-size:28px;margin:36px 0 16px;scroll-margin-top:110px}.itb-prose h3{font-size:22px;margin:28px 0 14px;scroll-margin-top:110px}.itb-prose p{margin-bottom:22px}.itb-prose a{color:#0878dc;text-decoration:underline}.itb-prose img,.itb-prose video,.itb-prose iframe{max-width:100%;height:auto}.itb-prose iframe{aspect-ratio:16/9;width:100%}.itb-prose table{display:block;max-width:100%;overflow:auto;border-collapse:collapse}.itb-prose td,.itb-prose th{padding:10px;border:1px solid var(--line)}.itb-prose blockquote{border-left:3px solid var(--blue);background:#edf7ff;padding:20px;margin:24px 0;font-size:19px}.itb-aside{position:sticky;top:24px;display:grid;gap:20px}.itb-aside section{background:white;border:1px solid var(--line);padding:22px;border-radius:16px}.itb-aside h2{font-size:17px;margin:0 0 15px}.itb-toc{list-style:none;padding:0;margin:0;max-height:360px;overflow:auto}.itb-toc li{margin-bottom:10px;font-size:12px}.itb-toc li.sub{padding-left:12px}.itb-toc a:hover{color:#0878dc}.itb-aside p{font-size:13px;color:var(--muted)}.itb-share{display:flex;justify-content:center;gap:10px;margin-top:24px;flex-wrap:wrap}.itb-share button{border:1px solid var(--line);background:white;border-radius:9px;padding:9px 15px;color:var(--ink);font-size:12px;cursor:pointer}.itb-share-status{font-size:12px;display:block;min-height:22px;color:#0878dc;margin-top:8px}.itb-progress{height:3px;position:fixed;top:0;left:0;width:0;z-index:10060;background:#168df4;pointer-events:none}
@media(max-width:1000px){.itb-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.itb-masthead h1{font-size:44px}.itb-layout{gap:24px;grid-template-columns:minmax(0,1fr) 230px}.itb-feature h2{font-size:29px}.itb-feature-copy{padding:28px}}
@media(max-width:700px){.itb{padding:28px 16px 44px}.itb-masthead{display:block}.itb-masthead h1{font-size:39px}.itb-masthead p{font-size:14px}.itb-search{margin-top:23px;min-width:0}.itb-feature{grid-template-columns:1fr;border-radius:18px}.itb-feature-image{min-height:0;aspect-ratio:1.55}.itb-feature-copy{padding:25px}.itb-feature h2{font-size:28px}.itb-feature p{font-size:13px}.itb-grid{gap:16px}.itb-card-body{padding:18px}.itb-card h2{font-size:20px}.itb-card p{font-size:12px}.itb-journey{align-items:flex-start;flex-direction:column;padding:24px}.itb-layout{grid-template-columns:1fr;margin-top:24px}.itb-aside{position:static;grid-row:1}.itb-aside .itb-discover{display:none}.itb-article-head h1{font-size:33px;letter-spacing:-1px}.itb-deck{font-size:15px}.itb-prose{padding:23px;font-size:16px}.itb-prose h2{font-size:25px}.itb-cover{border-radius:15px}.itb-empty{padding:28px 20px}}
@media(max-width:470px){.itb-grid{grid-template-columns:1fr}.itb-section-head h2{font-size:23px}.itb-art{min-height:190px}}
@media(prefers-reduced-motion:reduce){.itb-card{transition:none}.itb-card:hover{transform:none}}
.itb .itb-masthead,.itb .itb-article-head{background:transparent!important;box-shadow:none!important;border-radius:0;position:static;min-height:0}.itb .itb-masthead{padding:0 0 32px}.itb .itb-article-head{padding:0}

.itb-nav{scrollbar-width:none}.itb-nav::-webkit-scrollbar{display:none}

/* Every blog category is visible; no clipped horizontal strip. */
.itb .itb-nav{flex-wrap:wrap;overflow:visible;gap:8px;max-width:100%}.itb .itb-nav a{flex-shrink:1;white-space:normal;overflow-wrap:anywhere}
@media(max-width:600px){.itb .itb-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.itb .itb-nav a{padding:9px 11px;font-size:11px;display:flex;align-items:center;min-width:0}}