/* 勼拓 · Mobile-first brand system. White canvas / ink-green / copper. */
:root{--ink:#234843;--copper:#B77146;--copper-text:#95552F;--text:#243631;--muted:#56645E;--line:#DCE6E1;--mist:#EAF3EF;--white:#fff;--radius:16px;--sans:"Noto Sans CJK SC","PingFang SC","Microsoft YaHei",sans-serif;--serif:"Noto Serif CJK SC","Songti SC","SimSun",serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px;-webkit-text-size-adjust:100%}body{margin:0;background:var(--white);color:var(--text);font-family:var(--sans);font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased;padding-bottom:calc(86px + env(safe-area-inset-bottom,0px))}h1,h2,h3,h4,p,figure{margin:0}h1,h2,h3,h4{text-wrap:pretty}a{color:inherit;text-decoration:none;-webkit-tap-highlight-color:transparent}img{display:block;max-width:100%;height:auto}button{font:inherit}a,button{touch-action:manipulation}a:focus-visible,button:focus-visible{outline:3px solid var(--copper);outline-offset:5px}::selection{background:var(--mist);color:var(--ink)}.container,.nav-wrap,.site-footer{width:calc(100% - 40px);max-width:1160px;margin-inline:auto}.skip{position:fixed;top:-90px;left:20px;background:var(--ink);color:white;padding:12px;z-index:100}.skip:focus{top:10px}
/* Compact navigation, not a desktop menu shrunk into a phone. */
.site-header{position:sticky;top:0;z-index:40;background:#fff;border-bottom:1px solid var(--line)}.nav-wrap{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:flex;min-height:48px;align-items:center;flex-shrink:0}.brand img{width:156px;height:auto}.menu-toggle{width:48px;height:48px;border:1px solid var(--line);background:white;border-radius:50%;display:flex;justify-content:center;align-items:center;flex-direction:column;gap:6px;color:var(--ink)}.menu-toggle span{display:block;width:18px;height:1.5px;background:currentColor;transition:transform .18s}.menu-toggle[aria-expanded=true] span:first-child{transform:translateY(3.75px) rotate(45deg)}.menu-toggle[aria-expanded=true] span:last-child{transform:translateY(-3.75px) rotate(-45deg)}#site-nav{position:absolute;top:76px;left:0;right:0;padding:12px 20px 20px;background:white;border-bottom:1px solid var(--line);display:none;box-shadow:0 18px 25px -20px #23484355}#site-nav.open{display:grid}#site-nav a{display:flex;align-items:center;justify-content:space-between;min-height:50px;padding:0 14px;font-size:15px;border-radius:8px}#site-nav [aria-current=page]{background:var(--mist);font-weight:600}#site-nav .nav-contact{color:var(--copper-text)}
/* Display type + a semantic service map. */
.hero{padding:44px 0 40px;display:grid;gap:32px}.eyebrow{display:block;color:var(--copper-text);font-size:11px;font-weight:600;letter-spacing:.1em;line-height:1.6}.hero h1{font-family:var(--serif);font-size:clamp(30px,8.5vw,44px);font-weight:700;color:var(--ink);line-height:1.38;letter-spacing:-.035em;margin:20px 0}.hero h1 em{font-style:normal;color:var(--copper-text)}.lede{font-size:15px;color:var(--muted);line-height:1.95;max-width:35em;text-wrap:pretty}.lede em{font-style:normal;font-weight:600;color:var(--ink)}.hero-actions{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-top:26px}.btn,.dock-primary{display:inline-flex;justify-content:center;align-items:center;gap:20px;min-height:52px;padding:12px 20px;background:var(--ink);color:#fff;border-radius:8px;font-size:15px;font-weight:600;transition:background .18s,transform .18s}.btn span{font-size:19px;font-weight:400}.text-link{display:inline-flex;gap:12px;align-items:center;min-height:48px;color:var(--ink);font-size:14px}.btn:active,.item.live:active{transform:translateY(1px)}.btn:hover,.dock-primary:hover{background:#173B36}.service-map{background:var(--ink);border-radius:var(--radius);padding:22px;color:#fff;position:relative;isolation:isolate;box-shadow:0 20px 45px -32px #234843aa}.service-map:before{content:"";position:absolute;inset:0;border-radius:inherit;z-index:-1;background-image:linear-gradient(#ffffff08 1px,transparent 1px),linear-gradient(90deg,#ffffff08 1px,transparent 1px);background-size:32px 32px}.service-map figcaption{display:flex;justify-content:space-between;align-items:center;color:#D6E6DF;font-size:11px;letter-spacing:.08em}.service-map figcaption img{width:28px;height:30px;object-fit:contain}.map-core{margin-top:24px}.map-kicker{font-size:12px;color:#E5BA9E;letter-spacing:.12em}.map-row{padding:13px 0;border-bottom:1px solid #ffffff30;display:flex;justify-content:space-between;gap:12px}.map-row b{font-size:17px;font-weight:500}.map-row i{font-style:normal;color:#D8A584}.map-support{display:grid;gap:6px;margin-top:20px;font-size:12px;color:#D6E6DF}.map-support span:before{content:"↳";color:#D8A584;margin-right:10px}
/* Section rhythm: editorial strips / service panels / problem rows. */
.section{padding:40px 0;border-top:1px solid var(--line)}.section-head{margin-bottom:24px}.section-head h2{font-size:25px;line-height:1.5;letter-spacing:-.02em;color:var(--ink);font-weight:600;margin-top:10px}.three{display:grid;gap:0}.val{padding:22px 0;border-bottom:1px solid var(--line);position:relative}.val:last-child{border-bottom:0}.val b{font-size:18px;color:var(--ink);display:block;margin-bottom:9px;font-weight:600}.val span{font-size:15px;color:var(--muted);display:block;line-height:1.85}.cards{display:grid;gap:12px}.card{padding:24px;background:#fff;border:1px solid var(--line);border-radius:12px;display:grid;gap:16px;grid-template-columns:24px minmax(0,1fr);min-width:0}.card .no{font-size:14px;color:var(--copper-text);line-height:2}.card h3{font-size:19px;color:var(--ink);line-height:1.5;font-weight:600}.card p{margin-top:12px;font-size:15px;line-height:1.9;color:var(--muted)}.home .card:first-child{background:var(--mist);border-color:var(--mist)}.fit{padding:22px 0 0;color:var(--muted)}.fit h4{font-size:15px;color:var(--ink);line-height:1.8;font-weight:600}.fit p{font-size:14px;line-height:1.9;margin-top:8px}.tbl{border-top:1px solid var(--line)}.row{padding:22px 0;border-bottom:1px solid var(--line);display:grid;gap:10px}.cause{font-size:18px;font-weight:600;color:var(--ink);line-height:1.7}.fix{font-size:15px;color:var(--muted);line-height:1.9}.flow,.how{display:grid;gap:0;counter-reset:steps}.step{display:grid;grid-template-columns:54px minmax(0,1fr);gap:15px;padding:22px 0;border-top:1px solid var(--line);position:relative}.step .tag{font-size:12px;color:var(--copper-text);padding-top:5px}.step b{font-size:19px;color:var(--ink);font-weight:600;display:block;line-height:1.6}.step span{font-size:15px;color:var(--muted);display:block;line-height:1.9;margin-top:10px}.entry{display:flex;justify-content:space-between;gap:20px;border-radius:14px;background:var(--ink);color:white;padding:28px 24px;margin-top:20px}.entry .t{font-size:23px;line-height:1.4;font-family:var(--serif)}.entry .d{font-size:13px;line-height:1.95;color:#D6E6DF;margin-top:12px}.entry .arrow{font-size:28px;color:#E4B393;align-self:center;flex-shrink:0}.entry:hover .arrow{transform:translateX(3px)}
/* Contact stays practical in WeChat: saveable original QR, no account name. */
.contact{margin:44px 0 0;padding:30px 24px;background:var(--mist);border-radius:var(--radius);display:grid;grid-template-columns:1fr;gap:18px;align-items:center}.contact .qr{width:196px;height:196px;object-fit:contain;padding:8px;background:white;border-radius:8px;border:1px solid var(--line)}.contact .who{font-size:21px;color:var(--ink);font-weight:600;line-height:1.6;margin-top:10px}.contact .tip{font-size:14px;line-height:1.9;color:var(--muted);margin-top:10px}.qr-help{font-size:12px;color:var(--muted);margin-top:12px}.qr-link{display:block;width:max-content;max-width:100%;border-radius:8px}.site-footer{padding:34px 0 26px;margin-top:36px;border-top:1px solid var(--line);display:grid;gap:12px}.footer-brand{display:flex;gap:12px;align-items:center;font-family:var(--serif);font-size:19px;font-weight:700}.footer-brand img{width:25px;height:27px;object-fit:contain}.slogan{color:var(--copper-text);font-family:var(--serif);font-size:16px}.meta{font-size:12px;color:var(--muted)}.cta{display:flex;align-items:flex-start;flex-direction:column;gap:16px;padding:32px 0}.sub-link{display:inline-flex;align-items:center;min-height:44px;font-size:14px;text-decoration:underline;text-underline-offset:5px;color:var(--copper-text)}.mobile-dock{position:fixed;bottom:0;left:0;right:0;z-index:30;background:white;border-top:1px solid var(--line);padding:10px 20px calc(10px + env(safe-area-inset-bottom,0px));display:grid;grid-template-columns:1fr 1.5fr;gap:12px;box-shadow:0 -8px 24px -22px #23484380}.mobile-dock>a{display:flex;align-items:center;justify-content:center;min-height:48px;font-size:14px}.mobile-dock>a:first-child{border:1px solid var(--line);border-radius:8px}.mobile-dock .dock-primary{padding:10px 16px;font-size:14px}
/* Product catalogue: available product gets the visual focus. */
.catalogue-hero h1{font-size:clamp(26px,7.7vw,50px)}.catalogue-index{display:flex;gap:8px;flex-wrap:wrap}.catalogue-index span{border:1px solid var(--line);padding:6px 12px;border-radius:4px;font-size:12px;color:var(--muted)}.list{display:grid;gap:16px;margin-bottom:34px}.item{display:block;border:1px solid var(--line);padding:24px;border-radius:14px;position:relative;min-width:0}.product-index{display:block;font-size:11px;letter-spacing:.13em;color:var(--copper-text);margin-bottom:16px}.head{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:10px}.name{font-size:21px;font-weight:600;color:var(--ink);line-height:1.5;overflow-wrap:anywhere}.tag{white-space:nowrap;font-size:11px;line-height:1.8;padding:3px 9px;border-radius:4px;flex-shrink:0;letter-spacing:.04em}.tag.on{background:var(--ink);color:#fff}.tag.soon{border:1px solid var(--line);color:var(--muted);background:#fff}.item p{font-size:15px;color:var(--muted);margin-top:14px;line-height:1.9}.item .go{display:inline-flex;align-items:center;min-height:44px;margin-top:14px;color:var(--copper-text);font-size:14px}.item.live{background:var(--mist);border-color:var(--mist);overflow:hidden}.product-preview{margin:24px -4px -24px;max-height:250px;overflow:hidden;position:relative;padding:0 12px}.product-preview img{width:100%;max-width:300px;margin:auto;border:5px solid white;border-radius:18px 18px 0 0;box-shadow:0 12px 40px -20px #23484377}.product-preview>span{position:absolute;left:20px;bottom:14px;background:white;border:1px solid var(--line);font-size:11px;padding:5px 10px;border-radius:4px;color:var(--muted)}.note{border-top:1px solid var(--line);padding-top:24px}.note p{font-size:15px;line-height:1.9;color:var(--ink)}.note .dim{font-size:13px;color:var(--muted);margin-top:8px}
/* Actual product screenshots anchor the detail page, not invented dashboards. */
.tutor-hero h1{font-size:clamp(38px,11vw,64px)}.phone-stage{background:var(--mist);border-radius:var(--radius);padding:26px 22px 20px;overflow:hidden}.phone-frame{max-width:290px;margin:auto;border:6px solid var(--ink);border-radius:23px;overflow:hidden;background:white;box-shadow:0 18px 35px -22px #23484399;max-height:435px}.phone-frame img{width:100%}.phone-stage figcaption{font-size:11px;text-align:center;color:var(--muted);margin-top:18px}.tutor .card{border-width:0 0 1px;border-radius:0;padding:22px 0}.demo-layout{border-radius:var(--radius);background:var(--mist);padding:26px 22px;margin-top:8px;display:grid;gap:26px}.card-demo h4{font-size:20px;color:var(--ink);line-height:1.7;font-weight:600;margin-bottom:20px;letter-spacing:0}.keys{display:flex;flex-wrap:wrap;gap:8px}.key{font-size:13px;background:white;border-radius:4px;padding:6px 10px;color:var(--ink);border:1px solid #CFDDD5}.rel{font-size:16px;font-weight:500;color:var(--ink);padding:20px 0;line-height:1.95}.demo-steps{padding-left:20px;color:var(--muted);font-size:14px;line-height:2}.demo-steps li+li{margin-top:8px}.summary-proof{overflow:hidden;max-height:380px;position:relative;border:1px solid var(--line);border-radius:10px;background:white}.summary-proof img{width:100%}.summary-proof figcaption{position:absolute;bottom:0;left:0;right:0;padding:10px;background:white;border-top:1px solid var(--line);font-size:11px;color:var(--muted);text-align:center}.tutor>.container>.fit{border-bottom:1px solid var(--line);padding-bottom:24px;margin-top:24px}.tutor .contact{gap:6px}.tutor .contact .qr{margin-bottom:12px}.lightbox{border:0;border-radius:16px;padding:20px;max-width:calc(100% - 32px);width:360px;background:white;color:var(--ink);box-shadow:0 20px 80px #0004}.lightbox::backdrop{background:#173b36bb}.lightbox img{width:100%}.lightbox button{display:block;margin:12px auto 0;min-height:44px;min-width:100px;border:1px solid var(--line);background:white;border-radius:6px;color:var(--ink)}
@media(min-width:600px){.container,.nav-wrap,.site-footer{width:calc(100% - 64px)}.hero{padding-top:56px;gap:36px}.hero h1{font-size:49px}.catalogue-hero h1{font-size:42px}.three{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.val{padding:0;border:0}.val b{font-size:19px}.val span{font-size:14px}.cards{grid-template-columns:repeat(2,minmax(0,1fr))}.home .card:first-child{grid-column:1/-1;padding:32px}.section{padding:52px 0}.section-head h2{font-size:30px}.row{grid-template-columns:.9fr 1.4fr;gap:30px;align-items:start}.contact{grid-template-columns:196px minmax(0,1fr);gap:30px;padding:32px}.contact-copy{grid-column:2}.tutor .contact{grid-template-columns:196px minmax(0,1fr);gap:8px 30px}.tutor .contact .qr{grid-row:1/4;align-self:center;margin:0}.list{grid-template-columns:repeat(2,minmax(0,1fr))}.item.live{grid-column:1/-1;display:grid;grid-template-columns:1.2fr 1fr;column-gap:30px;align-items:start;padding:32px 32px 0}.item.live>.product-index,.item.live>.head,.item.live>p,.item.live>.go{grid-column:1}.item.live>.product-preview{grid-column:2;grid-row:1/5;margin:0;max-height:350px;padding:0}.item.live>.go{margin-bottom:24px}.tutor .cards{grid-template-columns:1fr}.demo-layout{padding:34px}.site-footer{grid-template-columns:1fr 1fr}.meta{grid-column:1/-1}.slogan{align-self:center;text-align:right}}
@media(min-width:960px){body{padding-bottom:0}.container,.nav-wrap,.site-footer{width:calc(100% - 96px)}.nav-wrap{min-height:88px}.brand img{width:176px}.menu-toggle{display:none}#site-nav{position:static;display:flex;padding:0;border:0;box-shadow:none;gap:12px;align-items:center;background:transparent}#site-nav a{min-height:44px;font-size:14px}#site-nav [aria-current=page]{background:transparent;position:relative}#site-nav [aria-current=page]:after{content:"";position:absolute;bottom:0;left:14px;width:20px;height:2px;background:var(--copper)}#site-nav .nav-contact{margin-left:16px;border:1px solid var(--line);min-width:126px;gap:22px}.hero{grid-template-columns:1.15fr 1fr;align-items:center;gap:64px;padding:76px 0 72px}.hero h1{font-size:56px}.lede{font-size:16px}.service-map{padding:30px;transform:translateY(8px)}.map-row{padding:18px 0}.map-row b{font-size:20px}.map-support{margin-top:28px}.section{padding:64px 0}.section-head{margin-bottom:32px}.value-section{display:grid;grid-template-columns:.8fr 2fr;gap:40px}.value-section .section-head h2{font-size:26px}.three{padding-top:6px}.cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.home .cards{grid-template-columns:repeat(3,minmax(0,1fr))}.home .card:first-child{grid-column:auto;grid-row:span 2;display:flex;flex-direction:column;justify-content:space-between;padding:30px}.home .card:first-child h3{font-size:29px;max-width:7em}.home .card:first-child .no{font-size:18px}.home .card:first-child p{margin-top:24px}.card{padding:26px 22px}.card h3{font-size:18px}.card p{font-size:14px}.problem-section{display:grid;grid-template-columns:.85fr 1.6fr;gap:0 52px}.problem-section .section-head{grid-column:1;grid-row:1/3}.problem-section .tbl,.problem-section .fit{grid-column:2}.flow,.how{grid-template-columns:repeat(3,minmax(0,1fr));gap:30px}.step{display:block}.step .tag{display:block;margin-bottom:18px}.entry{padding:36px 40px}.entry .t{font-size:30px}.entry .d{font-size:14px}.contact{padding:40px;gap:48px;grid-template-columns:216px minmax(0,1fr);margin-top:58px}.contact .qr{width:216px;height:216px}.contact .who{font-size:29px}.site-footer{padding-top:38px;margin-top:64px;grid-template-columns:1fr 1fr}.mobile-dock{display:none}.catalogue-hero{grid-template-columns:1.55fr 1fr}.catalogue-hero h1{font-size:46px}.catalogue-index{justify-content:flex-end;gap:12px}.catalogue-index span{padding:14px 22px;font-size:16px}.item{padding:30px}.item.live{padding:40px 40px 0}.item.live>.product-preview{max-height:350px}.item.live .name{font-size:32px}.list{gap:22px}.list>.item:last-child{grid-column:1/-1}.tutor-hero{grid-template-columns:1fr 1fr}.tutor-hero h1{font-size:72px}.phone-stage{padding:32px}.phone-frame{max-height:455px}.tutor .cards{grid-template-columns:repeat(3,minmax(0,1fr));gap:34px}.tutor .card{grid-template-columns:1fr}.demo-layout{grid-template-columns:1.2fr 1fr;gap:44px;padding:44px}.summary-proof{max-height:450px}.card-demo h4{font-size:27px;line-height:1.65}.tutor .contact{grid-template-columns:216px minmax(0,1fr);gap:8px 48px}.tutor .contact .who{align-self:end}.tutor .contact .tip{align-self:start}.tutor .cta{flex-direction:row;align-items:center;gap:30px}.section-head h2{font-size:32px}}
@media(min-width:600px){.tutor .contact>.qr-link{grid-row:1/4;align-self:center}.tutor .contact>.who,.tutor .contact>.tip{grid-column:2}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
@media print{.site-header,.mobile-dock,.hero-actions{display:none}body{padding:0}.container{width:100%}.section{break-inside:avoid}.hero{padding-top:0}}