:root{color-scheme:light;--bg:#ffffff;--bg2:#f6f7fb;--surface:rgba(11,16,32,.04);--surface2:rgba(11,16,32,.06);--border:rgba(11,16,32,.10);--text:rgba(11,16,32,.92);--muted:rgba(11,16,32,.70);--muted2:rgba(11,16,32,.56);--primary:#6366f1;--primary2:#8b5cf6;--ok:#16a34a;--shadow:0 22px 70px rgba(15,18,27,.12);--ring:0 0 0 6px rgba(99,102,241,.16);--radius:16px;--radius2:22px;--container:1120px;--font:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{margin:0;font-family:var(--font);color:var(--text);background:linear-gradient(180deg,var(--bg) 0%,var(--bg2) 100%);min-height:100vh}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
code{font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:-999px;top:12px;padding:10px 14px;background:rgba(255,255,255,.92);border:1px solid var(--border);border-radius:999px;backdrop-filter:blur(10px)}
.skip-link:focus{left:12px;z-index:99}
.container{max-width:var(--container);margin:0 auto;padding:0 20px}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.72);border-bottom:1px solid rgba(11,16,32,.08);backdrop-filter:blur(12px)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:18px;height:70px}
.brand{display:flex;align-items:center;gap:10px;min-width:160px}
.brand__label{display:flex;flex-direction:column;gap:2px;line-height:1.1;align-items:flex-start}
.brand__mark{width:48px;height:48px;border-radius:12px;box-shadow:none;overflow:visible;display:grid;place-items:center;filter:drop-shadow(0 10px 18px rgba(24,182,255,.18))}
.brand__mark img{max-width:100%;max-height:100%;width:auto;height:auto;object-fit:contain}
.brand__text{font-weight:750;letter-spacing:.2px}
.brand__tag{display:block;margin:2px 0 0;font-size:12px;color:var(--muted2);padding:0;border:0;background:transparent;border-radius:0;box-shadow:none}
.nav__toggle{display:none;appearance:none;border:1px solid rgba(11,16,32,.14);background:rgba(255,255,255,.86);color:var(--text);border-radius:12px;padding:10px;cursor:pointer}
.nav__toggle:focus-visible{outline:none;box-shadow:var(--ring)}
.nav__toggle-icon{display:block;width:20px;height:12px;border-top:2px solid rgba(11,16,32,.82);border-bottom:2px solid rgba(11,16,32,.82);position:relative}
.nav__toggle-icon::after{content:"";position:absolute;left:0;right:0;top:50%;transform:translateY(-50%);border-top:2px solid rgba(11,16,32,.82)}
.nav__menu{display:flex;align-items:center;gap:18px}
.nav__link{font-size:14px;color:rgba(11,16,32,.72);padding:8px 10px;border-radius:10px;transition:background .2s ease,color .2s ease}
.nav__link:hover{background:rgba(11,16,32,.04);color:rgba(11,16,32,.92)}
.nav__link.is-active{color:rgba(11,16,32,.92);background:rgba(99,102,241,.10);border:1px solid rgba(99,102,241,.18)}
.nav__cta{display:flex;align-items:center;gap:10px;margin-left:4px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:10px 14px;border-radius:12px;border:1px solid var(--border);background:rgba(255,255,255,.86);color:rgba(11,16,32,.92);font-weight:650;font-size:14px;transition:transform .2s ease,filter .2s ease,background .2s ease,border-color .2s ease}
.btn:hover{transform:translateY(-1px);filter:brightness(1.03)}
.btn:focus-visible{outline:none;box-shadow:var(--ring)}
.btn:active{transform:translateY(0)}
.btn[disabled]{opacity:.55;cursor:not-allowed;transform:none}
.btn--primary{border-color:rgba(99,102,241,.26);background:linear-gradient(135deg,rgba(99,102,241,.14),rgba(139,92,246,.10));box-shadow:0 18px 44px rgba(99,102,241,.12)}
.btn--ghost{background:rgba(255,255,255,.72);border-color:var(--border)}
.btn--link{border:0;background:transparent;padding:10px 6px;color:rgba(59,130,246,.92)}
.btn--link:hover{filter:none;text-decoration:underline}
.btn--block{width:100%}
.hero{padding:78px 0 44px;position:relative;overflow:hidden}
.hero__bg{position:absolute;inset:-40px -40px -60px -40px;background:radial-gradient(600px 360px at 10% 20%,rgba(99,102,241,.10),transparent 60%),radial-gradient(540px 320px at 80% 10%,rgba(139,92,246,.08),transparent 60%),radial-gradient(700px 420px at 50% 95%,rgba(22,163,74,.06),transparent 60%);filter:saturate(1.02);pointer-events:none}
.hero__grid{display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center;position:relative}
.hero__copy{max-width:620px}
.badge{display:inline-flex;align-items:center;gap:10px;padding:8px 12px;border-radius:999px;border:1px solid rgba(11,16,32,.10);background:rgba(11,16,32,.03);color:rgba(11,16,32,.74);font-size:13px}
.dot{width:9px;height:9px;border-radius:999px;background:rgba(11,16,32,.28);box-shadow:0 0 0 4px rgba(11,16,32,.04)}
.dot--live{background:var(--ok);box-shadow:0 0 0 4px rgba(34,197,94,.12)}
.dot--ok{background:var(--ok);box-shadow:none}
.hero__title{margin:18px 0 12px;font-size:46px;letter-spacing:-.6px;line-height:1.08}
.hero__title-accent{display:block;margin-top:8px;font-size:40px;background:linear-gradient(90deg,rgba(11,16,32,.92),rgba(99,102,241,.88));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__subtitle{margin:0;color:var(--muted);font-size:16px;line-height:1.7}
.hero__actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.hero__meta{display:flex;flex-direction:column;gap:10px;margin-top:18px}
.meta-pill{display:flex;gap:12px;align-items:center;padding:10px 12px;border-radius:14px;border:1px solid rgba(11,16,32,.10);background:rgba(255,255,255,.78)}
.meta-pill__k{font-size:12px;color:var(--muted2)}
.meta-pill__v{font-size:13px;color:rgba(11,16,32,.84)}
.hero__visual{display:flex;flex-direction:column;gap:14px}
.mock{border-radius:var(--radius2);border:1px solid rgba(11,16,32,.10);background:rgba(255,255,255,.76);box-shadow:var(--shadow);overflow:hidden}
.mock__top{display:flex;align-items:center;gap:12px;padding:12px 14px;border-bottom:1px solid rgba(11,16,32,.08);background:rgba(11,16,32,.02)}
.mock__dots{width:38px;height:12px;background:radial-gradient(circle at 6px 6px,rgba(255,88,92,.85) 0 4px,transparent 4px),radial-gradient(circle at 19px 6px,rgba(255,207,85,.82) 0 4px,transparent 4px),radial-gradient(circle at 32px 6px,rgba(71,234,141,.80) 0 4px,transparent 4px)}
.mock__tabs{display:flex;gap:4px;flex-wrap:wrap;padding:4px;border-radius:999px;border:1px solid rgba(11,16,32,.10);background:rgba(11,16,32,.03)}
.mock__tabs .chip{border:1px solid transparent;background:transparent;color:var(--muted);border-radius:999px;padding:8px 12px;font-weight:750;font-size:12px;cursor:pointer;transition:background .2s ease,border-color .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease}
.mock__tabs .chip:hover{background:rgba(255,255,255,.75);color:rgba(11,16,32,.92)}
.mock__tabs .chip.is-active{background:rgba(255,255,255,.92);border-color:rgba(11,16,32,.10);color:rgba(11,16,32,.92);box-shadow:0 10px 26px rgba(15,18,27,.10);transform:translateY(-.5px)}
.chip:focus-visible{outline:none;box-shadow:var(--ring)}
.mock__body{padding:16px}
.mock__panel{display:none}
.mock__panel.is-active{display:block}
.kpi-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.kpi{border:1px solid rgba(11,16,32,.10);background:rgba(11,16,32,.02);border-radius:14px;padding:12px}
.kpi__k{font-size:12px;color:var(--muted2)}
.kpi__v{font-size:22px;font-weight:800;margin-top:4px}
.kpi__d{font-size:12px;color:rgba(180,187,255,.85);margin-top:2px}
.mock__hint{display:flex;align-items:center;gap:10px;margin-top:12px;padding:10px 12px;border-radius:14px;border:1px solid rgba(22,163,74,.18);background:rgba(22,163,74,.06);color:rgba(11,16,32,.86);font-size:13px}
.chat{display:flex;flex-direction:column;gap:10px}
.chat__msg{display:flex;flex-direction:column;gap:6px}
.chat__name{font-size:12px;color:var(--muted2)}
.chat__bubble{width:fit-content;max-width:86%;padding:10px 12px;border-radius:14px;border:1px solid rgba(11,16,32,.10);background:rgba(11,16,32,.02);color:rgba(11,16,32,.88);line-height:1.55}
.chat__msg--me{align-items:flex-end}
.chat__msg--me .chat__bubble{border-color:rgba(99,102,241,.18);background:rgba(99,102,241,.10)}
.chat__status{font-size:12px;color:var(--muted2);display:flex;align-items:center;gap:8px}
.dots{width:22px;height:6px;display:inline-block;background:radial-gradient(circle at 3px 3px,rgba(255,255,255,.55) 0 2px,transparent 3px),radial-gradient(circle at 11px 3px,rgba(255,255,255,.55) 0 2px,transparent 3px),radial-gradient(circle at 19px 3px,rgba(255,255,255,.55) 0 2px,transparent 3px);animation:dots 1.2s infinite ease-in-out}
@keyframes dots{0%,100%{opacity:.35}50%{opacity:1}}
.phone{max-width:320px;margin:0 auto;border-radius:22px;border:1px solid rgba(255,255,255,.12);background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.04));overflow:hidden}
.phone__bar{height:24px;background:rgba(255,255,255,.05);border-bottom:1px solid rgba(255,255,255,.10)}
.phone__card{padding:14px}
.phone__title{font-weight:800;margin-bottom:10px}
.phone__item{display:flex;align-items:center;justify-content:space-between;padding:10px;border-radius:12px;border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.04);margin-bottom:10px}
.pill{font-size:12px;padding:6px 10px;border-radius:999px;border:1px solid rgba(34,197,94,.22);background:rgba(34,197,94,.08);color:rgba(255,255,255,.86)}
.pill--muted{border-color:rgba(255,255,255,.14);background:rgba(255,255,255,.04);color:var(--muted)}
.phone__tip{margin-top:10px;font-size:12px;color:var(--muted2)}
.hero__logos{display:flex;flex-wrap:wrap;gap:10px}
.logo-pill{padding:8px 10px;border-radius:999px;border:1px solid rgba(11,16,32,.10);background:rgba(11,16,32,.02);color:rgba(11,16,32,.70);font-size:12px}
.section{padding:64px 0}
.section--alt{background:rgba(11,16,32,.02);border-top:1px solid rgba(11,16,32,.06);border-bottom:1px solid rgba(11,16,32,.06)}
.section__head{max-width:740px;margin-bottom:22px}
.section__label{display:inline-flex;padding:7px 10px;border-radius:999px;border:1px solid rgba(99,102,241,.20);background:rgba(99,102,241,.08);color:rgba(11,16,32,.86);font-size:12px;font-weight:700}
.section__title{margin:14px 0 10px;font-size:34px;line-height:1.16;letter-spacing:-.3px}
.section__desc{margin:0;color:var(--muted);font-size:15px;line-height:1.7}
.grid{display:grid;gap:14px}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.card{border-radius:var(--radius);border:1px solid var(--border);background:rgba(255,255,255,.78);padding:18px;transition:transform .2s ease,border-color .2s ease,background .2s ease;box-shadow:0 16px 55px rgba(15,18,27,.08)}
.card:hover{transform:translateY(-3px);border-color:rgba(99,102,241,.18);background:rgba(255,255,255,.92)}
.card__icon{font-size:20px}
.card__title{margin:12px 0 8px;font-size:16px}
.card__desc{margin:0;color:var(--muted);font-size:14px;line-height:1.7}
.card--wide{padding:20px}
.card__actions{margin-top:12px;display:flex;gap:10px;flex-wrap:wrap}
.tabs{border-radius:var(--radius2);border:1px solid var(--border);background:rgba(255,255,255,.72);overflow:hidden}
.tabs__bar{display:flex;flex-wrap:wrap;gap:8px;padding:12px;border-bottom:1px solid rgba(11,16,32,.08);background:rgba(11,16,32,.02)}
.tabs__tab{flex:0 0 auto;cursor:pointer;padding:10px 12px;border-radius:12px;border:1px solid rgba(11,16,32,.10);background:rgba(255,255,255,.86);color:rgba(11,16,32,.88);font-weight:750;font-size:13px;transition:background .2s ease,border-color .2s ease,color .2s ease}
.tabs__tab:hover{background:rgba(255,255,255,.96);color:rgba(11,16,32,.92)}
.tabs__tab.is-active{background:rgba(99,102,241,.12);border-color:rgba(99,102,241,.26);color:rgba(11,16,32,.92)}
.tabs__tab:focus-visible{outline:none;box-shadow:var(--ring)}
.tabs__panes{padding:18px}
.tabs__pane{display:none}
.tabs__pane.is-active{display:block}
.pane{display:grid;grid-template-columns:1fr 1fr;gap:16px;align-items:start}
.pane__title{margin:0 0 10px;font-size:18px}
.list{margin:0;padding-left:18px;color:var(--muted);line-height:1.9;font-size:14px}
.steps{display:flex;flex-direction:column;gap:12px}
.step{display:flex;gap:12px;padding:12px;border-radius:16px;border:1px solid var(--border);background:rgba(255,255,255,.86)}
.step__n{width:30px;height:30px;display:grid;place-items:center;border-radius:12px;background:rgba(99,102,241,.18);border:1px solid rgba(99,102,241,.24);font-weight:850}
.step__t{font-weight:800}
.step__d{color:var(--muted);font-size:13px;margin-top:2px;line-height:1.6}
.quote{border-radius:18px;border:1px solid var(--border);background:rgba(255,255,255,.86);padding:16px}
.quote__title{font-size:12px;color:var(--muted2);margin-bottom:8px}
.quote__text{margin:0;font-size:16px;line-height:1.6;color:var(--text)}
.quote__meta{margin-top:10px;font-size:13px;color:var(--muted)}
.alert{display:flex;gap:12px;padding:14px;border-radius:18px;border:1px solid var(--border);background:rgba(255,255,255,.78);margin-bottom:12px}
.alert--ghost{background:rgba(11,16,32,.02)}
.alert__icon{font-size:20px}
.alert__t{font-weight:800}
.alert__d{color:var(--muted);font-size:13px;line-height:1.6;margin-top:2px}
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.shot{border-radius:var(--radius2);overflow:hidden;border:1px solid var(--border);background:rgba(255,255,255,.86);margin:0}
.shot img{width:100%;height:220px;object-fit:cover}
.shot figcaption{padding:14px}
.shot__t{font-weight:850}
.shot__d{margin-top:4px;color:var(--muted);font-size:13px;line-height:1.55}
.marquee{border-radius:var(--radius2);border:1px solid var(--border);background:rgba(255,255,255,.86);overflow:hidden;margin:18px 0;position:relative}
.marquee::before,.marquee::after{content:"";position:absolute;top:0;bottom:0;width:70px;pointer-events:none;z-index:2}
.marquee::before{left:0;background:linear-gradient(90deg,rgba(7,11,24,.92),rgba(7,11,24,0))}
.marquee::after{right:0;background:linear-gradient(270deg,rgba(7,11,24,.92),rgba(7,11,24,0))}
.marquee__track{display:flex;gap:12px;padding:12px 14px;width:max-content;animation:marquee 22s linear infinite}
.marquee:hover .marquee__track{animation-play-state:paused}
.marquee__item{padding:10px 12px;border-radius:999px;border:1px solid var(--border);background:rgba(255,255,255,.96);color:rgba(11,16,32,.86);font-size:13px;white-space:nowrap}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.deploy{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.code-card{border-radius:var(--radius2);border:1px solid var(--border);background:rgba(255,255,255,.86);overflow:hidden}
.code-card__head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 14px;border-bottom:1px solid rgba(11,16,32,.08);background:rgba(11,16,32,.02)}
.code-card__title{font-weight:800;font-size:13px;color:rgba(11,16,32,.9)}
.icon-btn{cursor:pointer;border:1px solid var(--border);background:rgba(255,255,255,.86);color:rgba(11,16,32,.86);font-weight:750;font-size:12px;border-radius:10px;padding:8px 10px;transition:filter .2s ease,transform .2s ease}
.icon-btn:hover{filter:brightness(1.06);transform:translateY(-1px)}
.icon-btn:focus-visible{outline:none;box-shadow:var(--ring)}
.code{margin:0;padding:14px;color:rgba(11,16,32,.9);overflow:auto;line-height:1.65;font-size:13px;background:rgba(255,255,255,1)}
.callout{margin-top:14px;display:flex;gap:14px;align-items:center;justify-content:space-between;padding:16px;border-radius:var(--radius2);border:1px solid rgba(34,197,94,.24);background:rgba(34,197,94,.06)}
.callout__icon{font-size:18px}
.callout__t{font-weight:850}
.callout__d{color:var(--text);margin-top:4px}
.callout__actions{display:flex;gap:10px;flex-wrap:wrap}
.faq{display:grid;gap:10px;max-width:860px}
.faq__item{border-radius:18px;border:1px solid var(--border);background:rgba(255,255,255,.86);padding:2px 0}
.faq__q{cursor:pointer;padding:14px 16px;list-style:none;font-weight:800;color:var(--text)}
.faq__q::-webkit-details-marker{display:none}
.faq__a{padding:0 16px 14px;color:var(--muted);line-height:1.75;font-size:14px}
.footer{padding-top:40px;border-top:1px solid rgba(11,16,32,.08);background:rgba(11,16,32,.02)}
.footer__grid{display:grid;grid-template-columns:1.2fr 1fr .7fr;gap:20px;padding-bottom:26px;align-items:start}
.footer__desc{margin:10px 0 0;color:var(--muted);line-height:1.7;font-size:14px}
.brand--footer .brand__tag{display:none}
.footer__links{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.footer__qr{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.qr{padding:10px;border-radius:18px;border:1px solid var(--border);background:rgba(255,255,255,.86)}
.qr img{width:160px;height:160px;object-fit:cover;border-radius:12px;display:block}
.qr__tip{color:var(--muted);font-size:13px;line-height:1.6}
.footer__col{display:flex;flex-direction:column;gap:8px}
.footer__h{font-weight:850;color:var(--text);margin-bottom:4px}
.footer__col a{color:var(--muted);font-size:14px}
.footer__col a:hover{color:var(--text);text-decoration:underline}
.footer__bottom{border-top:1px solid rgba(11,16,32,.08);padding:14px 0}
.footer__bottom-inner{display:flex;align-items:center;justify-content:center;gap:10px;color:var(--muted2);font-size:13px}
.footer__muted{color:var(--muted2)}
.footer__muted:hover{color:var(--text);text-decoration:underline}

/* Courses (shared UX with root website) */
.course-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:14px;border-radius:calc(var(--radius) + 2px);border:1px solid var(--border);background:rgba(255,255,255,.86)}
.course-search input{width:min(520px,86vw);padding:12px 14px;border-radius:14px;border:1px solid var(--border);background:rgba(255,255,255,.96);color:var(--text)}
.course-search input::placeholder{color:rgba(11,16,32,.45)}
.course-search input:focus-visible{outline:none;box-shadow:var(--ring)}
.course-filters{margin-top:12px;display:flex;gap:10px;flex-wrap:wrap}
.course-grid{margin-top:10px}
.course-status{margin-top:12px;color:var(--muted);line-height:1.7}
.course-message{margin-top:6px;color:var(--muted);font-size:14px}
.course-card-title{display:flex;flex-wrap:wrap;gap:10px;align-items:baseline}
[data-reveal]{opacity:0;transform:translateY(10px);transition:opacity .55s ease,transform .55s ease}
[data-reveal].is-visible{opacity:1;transform:translateY(0)}
@media (max-width:980px){.hero__grid{grid-template-columns:1fr;gap:22px}.hero{padding-top:56px}.hero__title{font-size:40px}.hero__title-accent{font-size:34px}.grid--3{grid-template-columns:repeat(2,1fr)}.gallery{grid-template-columns:1fr}.shot img{height:240px}.deploy{grid-template-columns:1fr}.pane{grid-template-columns:1fr}.footer__grid{grid-template-columns:1fr}.footer__links{grid-template-columns:repeat(2,1fr)}}
@media (max-width:760px){html{scroll-padding-top:88px}.nav__toggle{display:inline-flex}.nav__menu{position:absolute;left:20px;right:20px;top:78px;border:1px solid rgba(11,16,32,.10);background:rgba(255,255,255,.94);border-radius:18px;padding:12px;flex-direction:column;align-items:stretch;gap:8px;display:none;box-shadow:var(--shadow)}.nav__menu.is-open{display:flex}.nav__cta{flex-direction:column;margin-left:0}.btn{width:100%}.hero__actions .btn--link{width:auto}.grid--2{grid-template-columns:1fr}.grid--3{grid-template-columns:1fr}.footer__links{grid-template-columns:1fr}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn{transition:none}.btn:hover{transform:none}.dots{animation:none}.marquee__track{animation:none}[data-reveal]{transition:none;opacity:1;transform:none}}