:root{--bg:#f7faff;--surface:#fff;--text:#122033;--muted:#617086;--line:#e3ebf5;--blue:#1976ff;--green:#1ca66b;--radius:22px;--container:1120px;--shadow:0 20px 55px rgba(25,69,113,.10)}
*{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(--text);background:radial-gradient(circle at 82% 0%,rgba(76,168,255,.11),transparent 27rem),linear-gradient(180deg,#fff 0%,var(--bg) 48%,#fff);line-height:1.6;-webkit-font-smoothing:antialiased}img{max-width:100%;display:block}a{color:inherit}button{font:inherit;cursor:pointer}
.container{width:min(calc(100% - 40px),var(--container));margin:auto}.skip-link{position:fixed;top:-70px;left:16px;z-index:9999;background:#122033;color:#fff;padding:10px 14px;border-radius:10px}.skip-link:focus{top:16px}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.86);backdrop-filter:blur(16px);border-bottom:1px solid rgba(227,235,245,.85)}.nav{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-weight:800}.brand-mark{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,#e7f3ff,#8dccff);color:#0872ed}.brand-mark svg{width:22px;height:22px}.brand-text{display:flex;flex-direction:column;line-height:1.05}.brand-text strong{font-size:17px}.brand-text span{font-size:11px;color:#738197;margin-top:4px;font-weight:600}
.nav-links{display:flex;gap:24px}.nav-links a{text-decoration:none;color:#58677b;font-size:14px;font-weight:700}.nav-links a:hover{color:var(--text)}.nav-actions{display:flex;align-items:center;gap:8px}.nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;text-decoration:none;font-weight:800;border-radius:14px;transition:.2s ease}.nav-cta{padding:11px 17px;color:#fff;background:linear-gradient(135deg,#1e73f2,#378dff);box-shadow:0 10px 26px rgba(25,118,255,.24);font-size:14px}.button-primary{padding:15px 21px;color:#fff;background:linear-gradient(135deg,#0f70f7,#4d9cff);box-shadow:0 14px 32px rgba(25,118,255,.22)}.button-secondary{padding:15px 21px;background:#fff;border:1px solid var(--line);color:var(--text);box-shadow:0 8px 26px rgba(25,69,113,.06)}.nav-cta:hover,.button:hover{transform:translateY(-1px)}.menu-toggle{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;width:44px;height:44px}
.hero{padding:86px 0 76px;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:55px}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:999px;background:#eaf4ff;color:#2463b8;font-size:12px;font-weight:800}.eyebrow-dot{width:7px;height:7px;background:#1da66c;border-radius:50%;box-shadow:0 0 0 5px rgba(29,166,108,.1)}
h1,h2,h3{letter-spacing:-.035em;line-height:1.08}.hero h1{font-size:clamp(44px,6vw,72px);margin:20px 0}.hero h1 span{display:block;color:var(--blue)}.hero-copy{font-size:19px;color:var(--muted);max-width:620px;margin:0 0 28px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px}.microcopy{display:flex;gap:18px;flex-wrap:wrap;color:#7b8899;font-size:12px;font-weight:700;margin-top:17px}.check{color:var(--green);font-weight:900}
.hero-visual{position:relative;min-height:560px;display:grid;place-items:center}.glow{position:absolute;width:450px;height:450px;border-radius:50%;background:radial-gradient(circle,rgba(80,173,255,.29),transparent 67%)}.device{position:relative;width:302px;height:548px;border-radius:40px;background:#101823;border:8px solid #1c2837;box-shadow:0 36px 110px rgba(21,68,132,.17);padding:7px;transform:rotate(2deg)}.device-screen{height:100%;border-radius:30px;background:#fff;overflow:hidden}.device-top{height:54px;background:#0f5b9a;color:#fff;display:flex;align-items:center;gap:8px;padding:0 14px;font-size:12px;font-weight:800}.device-avatar{width:27px;height:27px;border-radius:50%;background:#fff;display:grid;place-items:center;color:#1681d8}.chat{padding:18px 13px;background:linear-gradient(#eff7fd,#fff 50%);height:calc(100% - 54px)}.bubble{max-width:90%;padding:11px 12px;border-radius:14px;font-size:11px;line-height:1.45;margin-bottom:10px}.bubble.bot{background:#fff;border:1px solid #dbe7f2;box-shadow:0 5px 14px rgba(26,79,123,.06)}.bubble.user{margin-left:auto;background:#daf7c8}.file{display:flex;align-items:center;gap:9px;padding:9px 10px;background:#fff;border:1px solid #e6edf4;border-radius:11px;font-size:10px;font-weight:700;margin-top:7px}.file-icon{width:25px;height:25px;border-radius:7px;background:#e9f3ff;display:grid;place-items:center;color:#2180eb}.floating-card{position:absolute;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border:1px solid rgba(227,235,245,.9);border-radius:16px;box-shadow:var(--shadow);padding:13px 14px;font-size:12px;font-weight:800}.floating-card small{display:block;color:#7a8798;font-size:10px;margin-top:3px}.float-a{top:70px;left:0}.float-b{right:0;bottom:72px}.float-c{left:18px;bottom:110px}
.section{padding:86px 0}.section-muted{background:linear-gradient(180deg,rgba(238,247,255,.62),rgba(247,251,255,.92))}.section-head{text-align:center;max-width:720px;margin:0 auto 40px}.section-head h2{font-size:clamp(32px,4vw,46px);margin:11px 0}.section-head p{margin:0;color:var(--muted);font-size:17px}.kicker{font-size:12px;font-weight:900;letter-spacing:.08em;text-transform:uppercase;color:#3778c5}
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.feature-card{padding:26px;border:1px solid var(--line);background:rgba(255,255,255,.86);border-radius:20px;box-shadow:0 8px 26px rgba(25,69,113,.05)}.icon{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;margin-bottom:17px;background:#edf5ff;color:#1d79e8}.icon.green{background:#ecfbf4;color:#1ca66b}.icon.purple{background:#f3edff;color:#7a56d9}.icon.red{background:#fff0f3;color:#e2556a}.feature-card h3{font-size:17px;margin:0 0 7px}.feature-card p{font-size:14px;color:var(--muted);margin:0}
.tools-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}.tool-card{padding:22px 17px;text-decoration:none;border:1px solid var(--line);background:#fff;border-radius:17px;box-shadow:0 8px 26px rgba(25,69,113,.05);transition:.2s}.tool-card:hover{transform:translateY(-3px);border-color:#c7dcf5}.tool-card .icon{width:40px;height:40px;border-radius:12px;margin-bottom:14px}.tool-card h3{font-size:14px;margin:0 0 6px}.tool-card p{font-size:12px;color:var(--muted);margin:0}
.split{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}.split h2{font-size:clamp(32px,4vw,46px);margin:11px 0 16px}.split p{color:var(--muted);font-size:16px}.steps{display:grid;gap:18px;margin-top:27px}.step{display:grid;grid-template-columns:44px 1fr;gap:14px}.step-num{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,#1976ff,#61adff);font-weight:900}.step h3{margin:2px 0 4px;font-size:16px}.step p{margin:0;font-size:14px}.student-card{background:linear-gradient(145deg,#fff,#f1f8ff);border:1px solid #dfeaf6;border-radius:24px;padding:32px;box-shadow:var(--shadow);position:relative;overflow:hidden}.student-card h3{font-size:24px;margin:12px 0 10px}.student-card p{color:var(--muted)}.list-check{display:grid;gap:9px;list-style:none;padding:0;margin:20px 0}.list-check li{display:flex;gap:9px;font-weight:700;font-size:14px}
.faq{max-width:820px;margin:auto}.faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;margin-bottom:10px;overflow:hidden}.faq-q{width:100%;display:flex;justify-content:space-between;gap:20px;background:none;border:0;padding:20px 21px;text-align:left;font-weight:800;color:var(--text)}.faq-a{display:none;padding:0 21px 20px;color:var(--muted);font-size:14px}.faq-item.open .faq-a{display:block}
.cta-band{padding:80px 0}.cta-box{background:linear-gradient(135deg,#0c63dd,#398df8);color:#fff;border-radius:28px;padding:50px;position:relative;overflow:hidden;box-shadow:0 28px 80px rgba(25,118,255,.2)}.cta-box h2{font-size:clamp(30px,4vw,46px);margin:0 0 12px;max-width:680px}.cta-box p{opacity:.9;max-width:650px}.site-footer{background:#0d1826;color:#d9e6f3;padding:52px 0 28px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px}.footer-brand{margin-bottom:10px}.site-footer p{color:#8da0b5;font-size:13px}.site-footer a{color:#b9c9d9;text-decoration:none;font-size:13px}.footer-col{display:grid;align-content:start;gap:10px}.footer-col strong{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:#fff}.footer-bottom{margin-top:35px;padding-top:20px;border-top:1px solid rgba(255,255,255,.09);display:flex;justify-content:space-between;color:#778ba0;font-size:12px}
.page-hero{padding:76px 0 38px}.page-hero h1{font-size:clamp(40px,5vw,62px);margin:14px 0}.page-hero p{font-size:18px;color:var(--muted);max-width:760px}.breadcrumbs{display:flex;gap:8px;flex-wrap:wrap;font-size:12px;font-weight:700;color:#728198}.breadcrumbs a{text-decoration:none;color:#4e78a8}
.article-shell{padding:18px 0 80px}.article-layout{display:grid;grid-template-columns:minmax(0,760px) 260px;gap:55px;align-items:start}.article{background:#fff;border:1px solid var(--line);border-radius:26px;padding:clamp(25px,5vw,50px);box-shadow:0 8px 26px rgba(25,69,113,.05)}.article h2{font-size:30px;margin-top:42px}.article h3{font-size:22px;margin-top:30px}.article p,.article li{font-size:16px;color:#48586d}.article ul,.article ol{padding-left:22px}.article a{color:#0b63d7}.article .callout{background:#eff7ff;border:1px solid #d9eaff;border-radius:18px;padding:18px 20px;color:#325271;margin:25px 0}.article-meta{display:flex;gap:12px;flex-wrap:wrap;font-size:12px;color:#7a899a;font-weight:800}.toc{position:sticky;top:104px;border:1px solid var(--line);background:#fff;border-radius:18px;padding:18px;box-shadow:0 8px 26px rgba(25,69,113,.05)}.toc strong{font-size:12px;text-transform:uppercase;letter-spacing:.08em}.toc a{display:block;text-decoration:none;color:#6b7a8e;font-size:12px;margin-top:10px}
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.post-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px;text-decoration:none;box-shadow:0 8px 26px rgba(25,69,113,.05);transition:.2s}.post-card:hover{transform:translateY(-3px);border-color:#c8ddf4}.post-card .tag{display:inline-flex;padding:6px 9px;border-radius:999px;background:#eef6ff;color:#2c68ad;font-size:11px;font-weight:900}.post-card h2{font-size:20px;margin:14px 0 9px}.post-card p{font-size:14px;color:var(--muted);margin:0 0 15px}.post-card time{font-size:11px;color:#8290a1;font-weight:800}.tool-panel{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);padding:30px}.file-drop{border:2px dashed #bcd6f1;border-radius:18px;padding:44px 20px;text-align:center;background:#f7fbff}.file-drop h2{font-size:23px;margin:12px 0 7px}.file-drop p{margin:0 auto 18px;color:var(--muted);max-width:520px;font-size:14px}.tool-note{display:flex;gap:9px;flex-wrap:wrap;color:#79889b;font-size:12px;font-weight:700;justify-content:center;margin-top:14px}
@media(max-width:980px){.hero-grid,.split,.article-layout{grid-template-columns:1fr}.hero-visual{order:-1}.feature-grid{grid-template-columns:repeat(2,1fr)}.tools-grid{grid-template-columns:repeat(3,1fr)}.toc{position:static}}
@media(max-width:760px){.container{width:min(calc(100% - 28px),var(--container))}.nav{min-height:68px}.nav-links{display:none;position:absolute;left:14px;right:14px;top:72px;padding:15px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);flex-direction:column}.nav-links.open{display:flex}.menu-toggle{display:block}.nav-actions .nav-cta{display:none}.hero{padding:55px 0 45px}.hero h1{font-size:45px}.hero-copy{font-size:17px}.hero-visual{min-height:470px}.device{width:260px;height:474px}.feature-grid,.tools-grid,.blog-grid{grid-template-columns:1fr}.section{padding:65px 0}.cta-box{padding:35px 25px}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}.footer-bottom{flex-direction:column}.page-hero{padding:52px 0 28px}.article{padding:24px 19px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}