:root{--ink:#142b50;--muted:#60748f;--primary:#1764e8;--paper:#f5f9ff;--line:#dce6f4;--soft-blue:#e5efff}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:104px}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}a,button{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible{outline:3px solid var(--primary);outline-offset:5px}button,a{touch-action:manipulation}button:disabled{cursor:default}.wrap{width:min(1200px,calc(100% - 96px));margin:auto}.header{background:#f8f7f2f2;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10;backdrop-filter:blur(15px)}.nav-wrap{height:96px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:11px;font-size:23px;font-weight:850;letter-spacing:1px;flex-shrink:0}.brand img{border-radius:14px}.brand-light{font-weight:500;font-size:20px}.brand small{display:block;font-size:9px;letter-spacing:2px;font-weight:550;margin-top:3px}nav{display:flex;gap:35px;font-size:14px;font-weight:600}nav a{position:relative;padding:15px 0}nav a:hover,nav a.active{color:var(--primary)}nav .active:after{content:"";position:absolute;bottom:3px;left:45%;width:5px;height:5px;border-radius:100%;background:var(--primary)}.button{display:inline-flex;justify-content:center;align-items:center;gap:35px;padding:17px 26px;border:1px solid var(--primary);background:var(--primary);color:white;border-radius:7px;font-size:15px;font-weight:650;transition:transform .2s,background .2s}.button:hover{background:#0c4ec4;transform:translateY(-2px)}.button span{font-size:21px;line-height:1}.button.small{font-size:14px;padding:12px 19px;gap:22px}.button.outline{color:var(--ink);border-color:#bfd2ee;background:transparent}.button.outline:hover{background:var(--soft-blue)}.menu-toggle{display:none}.hero{display:grid;grid-template-columns:1fr 1fr;gap:30px;min-height:650px;padding-top:58px;padding-bottom:48px;align-items:center}.eyebrow{display:flex;align-items:center;gap:9px;font-size:11px;font-weight:650;letter-spacing:1.6px}.status-dot{height:7px;width:7px;background:var(--primary);border-radius:50%}.eyebrow-line{height:1px;width:22px;background:#91afd4}h1{font-size:64px;line-height:1.3;letter-spacing:-2px;margin:25px 0 23px;font-weight:850}.accent-text{color:var(--primary)}.underline{position:relative;white-space:nowrap}.underline svg{position:absolute;left:0;bottom:-8px;width:100%;height:15px;fill:none;stroke:#76b9ff;stroke-width:3;stroke-linecap:round}.hero-lead{font-size:17px;line-height:1.9;margin:0 0 15px}.hero-detail{font-size:13px;line-height:1.9;color:var(--muted);margin-bottom:27px}.hero-actions{display:flex;gap:14px}.location-line{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:11px;margin-top:30px}.location-line>span:first-child{font-size:23px;color:var(--ink)}.location-divider{color:#b2c9e6;margin:0 4px}.hero-art{position:relative;min-width:0;height:530px;background:radial-gradient(ellipse at 50% 49%,#e2efff 0%,#e2efff 50%,transparent 70%)}.robot{position:absolute;width:108%;left:-4%;top:1%;height:100%;object-fit:contain}.orbit{position:absolute;top:11%;left:6%;width:89%;height:78%;border:1px dashed #91b9ed;border-radius:50%;transform:rotate(-25deg)}.orbit-two{transform:rotate(32deg);width:77%;height:90%;left:13%;top:3%;border-color:#c2d8f4}.code-sticker{position:absolute;top:17px;right:0;z-index:2;background:#142f59;color:#e3efff;padding:13px 22px 20px;border-radius:10px;box-shadow:5px 7px 0 #c1d8f5;transform:rotate(6deg);font-size:12px;line-height:1.9}.code-sticker code{font-family:monospace}.code-sticker code span{color:#7fbdff}.code-sticker em{color:#72e0f5;font-style:normal}.code-dots{display:block;font-size:8px;letter-spacing:4px;margin-bottom:8px;color:#83a9da}.art-tag{position:absolute;z-index:2;background:#ffffff;box-shadow:0 8px 24px #123b7015;border:1px solid #d8e5f5;border-radius:9px}.tag-left{left:-10px;top:287px;display:flex;align-items:center;gap:12px;padding:14px 18px;transform:rotate(-6deg);font-size:14px;font-weight:700}.tag-left small{display:block;font-size:10px;color:var(--muted);margin-top:5px;font-weight:500;letter-spacing:2px}.tag-icon{color:var(--primary);font-size:24px;font-family:monospace}.tag-right{right:-10px;bottom:61px;padding:13px 18px;font-size:11px;letter-spacing:1.6px;transform:rotate(6deg)}.tag-right span{color:var(--primary);font-size:22px;margin-right:8px;vertical-align:middle}.art-spark{position:absolute;font-size:43px;color:var(--primary)}.spark-one{left:6%;top:40px}.spark-two{right:0;top:228px;font-size:27px}.art-caption{position:absolute;bottom:-6px;left:8%;width:85%;font-family:monospace;font-size:9px;color:var(--muted);letter-spacing:1.4px;display:flex;justify-content:space-between}.learning-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#eaf2ff}.learning-strip .wrap{display:flex;align-items:center;justify-content:space-between;padding:24px 12px;font-size:15px;letter-spacing:1px}.learning-strip b{font-size:11px;font-family:monospace;color:#557cad;margin-right:15px}.learning-strip i{font-style:normal;color:#88afe0;font-size:20px}.section{padding-top:90px;padding-bottom:90px}.section-top{display:flex;justify-content:space-between;align-items:end;gap:25px}h2{font-size:34px;line-height:1.5;letter-spacing:-.8px;margin:16px 0 0;font-weight:800}.section-top p{font-size:12px;line-height:1.9;color:var(--muted);margin-bottom:3px}.filters{display:flex;gap:10px;flex-wrap:wrap;margin:32px 0 25px}.filters button{border:1px solid var(--line);border-radius:6px;color:var(--muted);background:transparent;padding:11px 17px;font-size:12px;transition:background .2s}.filters .selected{background:var(--ink);border-color:var(--ink);color:white}.filters button:hover{border-color:var(--ink)}.filters span{margin-left:9px;font-size:10px;opacity:.65}.course-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.course-card{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#ffffff;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}.course-card:hover{transform:translateY(-4px);box-shadow:0 10px 25px #16458b12}.course-art{height:137px;position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;background:var(--tint);color:var(--accent)}.course-art:before{content:"";position:absolute;inset:0;background-image:radial-gradient(currentColor .6px,transparent .6px);background-size:13px 13px;opacity:.13}.course-number{position:absolute;left:15px;top:12px;font:10px monospace;opacity:.65}.course-symbol{font-family:monospace;font-size:44px;font-weight:800;letter-spacing:-2px;transform:rotate(-8deg);text-shadow:4px 5px 0 #ffffff88}.course-art:after{content:"✦";position:absolute;right:28px;bottom:20px;font-size:22px;opacity:.5}.course-content{padding:20px;display:flex;flex:1;flex-direction:column}.course-age{font-size:10px;letter-spacing:1px;font-weight:650;color:var(--accent)}.course-content h3{font-size:17px;line-height:1.55;margin:8px 0 12px}.course-content p{color:var(--muted);font-size:12px;line-height:1.9;margin:0 0 14px}.course-output{border-top:1px solid var(--line);padding-top:12px;color:var(--ink);font-size:11px;line-height:1.8;margin-top:auto}.course-output b{display:block;font-size:10px;color:var(--muted);font-weight:500;margin-bottom:3px}.course-link{font-size:11px;margin-top:17px;display:flex;justify-content:space-between}.course-link:hover{color:var(--primary)}.course-note{font-size:11px;color:var(--muted);margin:23px 0 0;line-height:1.8}.about{background:#edf4ff;border-block:1px solid var(--line)}.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:85px;align-items:center}.about-visual{position:relative;background:#dceaff;border-radius:12px;min-height:425px;padding:30px;overflow:hidden;background-image:linear-gradient(#ffffff30 1px,transparent 1px),linear-gradient(90deg,#ffffff30 1px,transparent 1px);background-size:25px 25px}.about-visual .eyebrow{font-family:monospace;font-size:10px}.build-diagram{display:flex;flex-direction:column;align-items:center;padding:38px 0 28px;position:relative;z-index:1}.diagram-block{display:block;border:2px solid var(--ink);box-shadow:5px 5px 0 #142f59;font-weight:700;letter-spacing:2px;padding:14px 30px;border-radius:6px;min-width:195px;text-align:center}.block-one{background:#f0f7ff;transform:rotate(-5deg)}.block-two{background:#8dc7ff;transform:rotate(3deg)}.block-three{background:#e1f8ff;transform:rotate(-3deg)}.diagram-arrow{padding:10px;font-size:20px}.visual-note{font-size:10px;color:#536f94}.about-star{position:absolute;font-size:100px;right:-15px;bottom:-24px;color:#9fbfe9}.about-copy p{font-size:13px;line-height:2;color:#5c7292;margin:20px 0}.about-points{display:flex;justify-content:space-between;border-top:1px solid #c9daf2;padding-top:22px;margin:25px 0}.about-points b{font-size:12px}.about-points small{display:block;font-size:10px;color:var(--muted);margin-top:9px}.text-link{padding:0;border:0;background:none;font-size:12px;font-weight:650;color:var(--ink)}.text-link span{margin-left:12px;color:var(--primary)}.text-link:hover{color:var(--primary)}.contact{display:grid;grid-template-columns:1fr 1fr;gap:90px;align-items:start}.contact-intro p{font-size:13px;line-height:2;color:var(--muted);margin-top:22px}.contact-decoration{font:90px monospace;color:#d0e3fb;letter-spacing:-9px;margin-top:25px}.contact-decoration span{color:#64b3f7}.contact-card{padding:30px;border:1px solid var(--line);background:#ffffff;border-radius:12px}.contact-row{display:flex;gap:18px;padding-bottom:25px;margin-bottom:23px;border-bottom:1px solid var(--line)}.contact-icon{display:flex;align-items:center;justify-content:center;background:#eaf2ff;width:38px;height:38px;border-radius:50%;font-size:22px;flex-shrink:0}.contact-row small{font-size:10px;color:var(--muted);display:block;line-height:1.6;margin:1px 0 8px}.phone{display:block;font-size:28px;letter-spacing:.4px;font-weight:750}.phone:hover{color:var(--primary)}.contact-row p{font-size:11px;color:var(--muted);line-height:1.8;margin:10px 0 0}.contact-row h3{font-size:15px;margin:0;line-height:1.8}.copy-address{margin-top:14px;font-size:11px}.contact-call{width:100%;justify-content:space-between}.copy-status{font-size:12px;margin:0;color:var(--ink)}.copy-status:not(:empty){margin-top:14px}footer{background:var(--ink);color:#f0f6ff;padding:35px 0 24px}.footer-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:30px}.footer-brand{font-size:18px}.footer-brand small{font-size:10px;letter-spacing:1px;color:#a4bedf;font-weight:400;margin-top:7px}.back-top{font-size:11px;color:#bed4f1}.footer-bottom{border-top:1px solid #304f7b;padding-top:22px;display:flex;justify-content:space-between;gap:20px;color:#afc6e5;font-size:10px;line-height:1.8}.footer-bottom>div{display:flex;gap:20px;flex-wrap:wrap}.footer-bottom a:hover{text-decoration:underline;color:white}.mobile-cta{display:none}.skip{position:fixed;top:-100px;left:20px;z-index:100;background:var(--ink);color:white;padding:14px}.skip:focus{top:10px}[hidden]{display:none!important}.wechat-qr{width:150px;height:auto;display:block;margin:12px 0}
@media(min-width:1500px){.hero{min-height:700px}.hero-art{height:570px}h1{font-size:70px}}
@media(max-width:1100px){.wrap{width:calc(100% - 64px)}nav{gap:22px}.hero{gap:15px}h1{font-size:54px}.hero-art{height:470px}.course-grid{grid-template-columns:repeat(2,1fr)}.course-art{height:145px}.about-grid,.contact{gap:45px}.phone{font-size:25px}.tag-left{left:0}.tag-right{right:0}.code-sticker{font-size:10px;padding:10px 14px}}
@media(max-width:760px){html{scroll-padding-top:88px}.wrap{width:calc(100% - 40px)}.nav-wrap{height:76px;gap:12px}.brand{font-size:19px;gap:9px}.brand img{width:39px;height:39px}.brand-light{font-size:17px}.brand small{font-size:8px;letter-spacing:1.4px}.menu-toggle{display:block;margin-left:auto;background:none;border:1px solid #c6d9f1;border-radius:5px;font-size:19px;color:var(--ink);width:38px;height:38px}.nav-contact{display:none!important}nav{display:none;position:absolute;top:76px;left:0;right:0;background:var(--paper);border-bottom:1px solid var(--line);padding:12px 20px;box-shadow:0 15px 20px #163e730d}nav.open{display:flex;flex-direction:column;gap:0}nav a{padding:12px}nav .active:after{display:none}.hero{grid-template-columns:1fr;gap:22px;padding-top:35px;padding-bottom:32px}.eyebrow{font-size:9px;letter-spacing:1px}h1{font-size:clamp(40px,10.5vw,57px);margin:21px 0 25px;line-height:1.3;letter-spacing:-1.5px}.hero-lead{font-size:15px}.hero-detail{font-size:12px;margin-top:14px}.hero-actions .button{padding:15px 22px;gap:23px;font-size:13px}.location-line{margin-top:22px;font-size:10px}.hero-art{height:385px;width:min(440px,100%);margin:auto}.robot{width:104%;left:-2%}.code-sticker{top:5px;right:9px;font-size:10px}.tag-left{top:210px;padding:10px 12px;font-size:12px;left:0}.tag-left small{font-size:9px}.tag-right{bottom:39px;font-size:9px;padding:10px 12px}.spark-one{font-size:33px;left:4%;top:27px}.spark-two{top:180px}.art-caption{font-size:8px;left:3%;width:94%;bottom:-5px;letter-spacing:.5px}.learning-strip .wrap{flex-wrap:wrap;padding:17px 0;gap:15px}.learning-strip span{width:calc(50% - 12px);font-size:12px}.learning-strip b{font-size:10px;margin-right:12px}.learning-strip i{display:none}.section{padding-top:55px;padding-bottom:55px}.section-top{display:block}h2{font-size:27px;line-height:1.5;margin-top:12px}.section-top p{font-size:12px;margin:17px 0 0}.filters{margin-top:24px;gap:8px}.filters button{font-size:11px;padding:10px 12px}.course-grid{gap:13px}.course-art{height:113px}.course-symbol{font-size:33px}.course-content{padding:15px}.course-content h3{font-size:15px;margin:7px 0 9px}.course-content p{font-size:11px;line-height:1.85}.course-age{font-size:9px}.course-output{font-size:10px}.course-link{font-size:10px}.course-number{font-size:9px;left:10px;top:10px}.course-note{font-size:10px}.about-grid,.contact{grid-template-columns:1fr;gap:32px}.about-visual{min-height:370px;padding:25px}.build-diagram{padding:30px 0 24px}.diagram-block{padding:12px 27px}.about-copy p{font-size:13px}.about-points small{font-size:9px}.contact-decoration{display:none}.contact-card{padding:23px 19px}.phone{font-size:26px}.contact-row{gap:13px}.contact-row h3{font-size:14px}.contact-row p{font-size:10px}.contact-intro p{margin-bottom:0}.footer-bottom{flex-direction:column;gap:12px}.footer-bottom>div{gap:12px}.footer-brand{font-size:16px}.footer-brand small{font-size:9px}.footer-top{padding-bottom:23px}.back-top{font-size:10px}footer{padding-bottom:95px}.mobile-cta{display:grid;grid-template-columns:1fr 1.5fr;position:fixed;bottom:0;left:0;right:0;z-index:15;background:var(--paper);border-top:1px solid var(--line);padding:10px 20px max(10px,env(safe-area-inset-bottom));gap:10px}.mobile-cta a{font-size:13px;text-align:center;padding:13px 10px;border:1px solid #bfd4ee;border-radius:6px}.mobile-cta a:last-child{background:var(--primary);border-color:var(--primary);color:white}.desktop-br{display:none}}
@media(max-width:360px){.wrap{width:calc(100% - 32px)}.course-grid{grid-template-columns:1fr}.hero-art{height:340px}.hero-actions .button{gap:16px;padding:14px 18px}.phone{font-size:23px}.course-art{height:130px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}

/* Blue technology palette: crisp surfaces, fine grids and a soft cyan glow. */
.hero-art{background:radial-gradient(ellipse at 55% 45%,#ccecff 0%,#e2efff 46%,transparent 72%)}
.hero-art:before{content:"";position:absolute;inset:9% 5%;background-image:linear-gradient(#5c9ee514 1px,transparent 1px),linear-gradient(90deg,#5c9ee514 1px,transparent 1px);background-size:28px 28px;border-radius:50%;mask-image:radial-gradient(ellipse,#000 30%,transparent 73%);pointer-events:none}
.button:not(.outline){box-shadow:0 5px 16px #1764e81a}
.code-sticker{border:1px solid #4c8bcd;box-shadow:5px 7px 0 #c1d8f5,0 12px 30px #1a64ac12}
.course-card:hover{border-color:#9cbfee}
.about-visual{background-image:linear-gradient(#ffffff60 1px,transparent 1px),linear-gradient(90deg,#ffffff60 1px,transparent 1px)}