:root{--paper:#fcf9f3;--ink:#492b39;--muted:#8c7b80;--line:#e7deda;--coral:#f45d48;--berry:#ba3276;--yellow:#ffc248;--white:#fffefa;--serif:'Noto Serif SC','Songti SC','SimSun',serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:14px/1.7 'Microsoft YaHei','PingFang SC',sans-serif}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}a,button{transition:color .2s,background .2s,transform .2s,border-color .2s,box-shadow .2s;-webkit-tap-highlight-color:transparent}button:active,.btn:active{transform:translateY(1px) scale(.99)}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #ba32766e;outline-offset:5px}img{display:block;max-width:100%}.skip{position:fixed;left:10px;top:-80px;background:white;z-index:5;padding:12px}.skip:focus{top:10px}header{height:88px;border-bottom:1px solid var(--line)}.header-inner{max-width:1220px;height:100%;padding:0 25px;display:flex;align-items:center;justify-content:space-between;margin:auto}.brand{display:flex;align-items:center;gap:11px}.brand .mark{height:39px;width:39px}.brand .wordmark{width:118px;height:31px}nav{height:100%;display:flex;align-items:center;gap:36px;margin-left:-85px}nav a{height:100%;display:flex;align-items:center;font-size:13px;position:relative}nav a.active:after{content:'';position:absolute;bottom:18px;left:50%;width:5px;height:5px;border-radius:50%;background:var(--coral)}nav a:hover,.preview-back:hover{color:var(--coral)}.preview-back{color:var(--muted);font-size:11px}main,footer{max-width:1170px;margin:0 auto}.crumbs{font-size:10px;color:var(--muted);display:flex;gap:11px;align-items:center;padding:26px 0 0}.crumbs a:hover{color:var(--coral)}.eyebrow{margin:0 0 15px;font-size:10px;letter-spacing:2px;color:var(--muted);display:flex;align-items:center;gap:10px}.eyebrow:before{content:'';width:6px;height:6px;border-radius:50%;background:var(--coral)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:29px;min-height:46px;background:var(--ink);color:var(--white);border:1px solid var(--ink);padding:11px 21px;font-size:12px;border-radius:5px}.btn:hover{background:#6a4556;box-shadow:0 7px 14px #492b3914;transform:translateY(-2px)}.btn span{font-size:18px;line-height:1}.btn.light{color:var(--ink);background:none;border-color:#daccca}.btn.light:hover{background:#f3eae3}.availability-note{display:flex;align-items:center;gap:9px;color:var(--muted);font-size:10px;padding:23px 0 35px;margin:0}.availability-note>span{width:5px;height:5px;background:#b9ada9;border-radius:50%;flex-shrink:0}footer{padding:25px 0 28px;display:flex;justify-content:space-between;border-top:1px solid var(--line);font-size:16px;font-family:var(--serif)}footer i{font:10px 'Microsoft YaHei',sans-serif;color:var(--muted);font-style:normal;margin-left:22px}footer small{font:9px 'Microsoft YaHei',sans-serif;color:var(--muted);align-self:center}.page-enter{animation:arrive .35s both}@keyframes arrive{from{opacity:.3;transform:translateY(5px)}to{opacity:1;transform:none}}.platform{min-height:680px;position:relative;padding:99px 0 66px;overflow:hidden}.platform h1{font-family:var(--serif);font-size:70px;line-height:1.3;margin:0 0 24px;letter-spacing:-2px}.platform h1 span{color:var(--coral)}.platform-copy{font-size:14px;color:var(--muted);line-height:1.9;margin:0 0 28px}.platform-art{position:absolute;right:55px;top:115px;width:330px;transform:rotate(-6deg)}.platform-art:before{content:'';position:absolute;inset:-20px;background:#f5e6d9;border-radius:50%;z-index:-1}.platform-subjects{display:flex;gap:30px;margin-top:45px}.platform-subjects>span{font-size:13px;display:flex;flex-direction:column;gap:4px}.platform-subjects small{font-size:9px;color:var(--muted)}.physics-intro{display:flex;align-items:end;justify-content:space-between;gap:25px;padding:36px 0 33px}.physics-intro h1{font-family:var(--serif);font-size:43px;line-height:1.4;letter-spacing:-1px;margin:0 0 12px}.physics-intro h1 span{color:var(--coral)}.physics-intro p:not(.eyebrow){font-size:12px;color:var(--muted);margin:0}.back-subjects{font-size:11px;color:var(--muted);margin-bottom:7px;white-space:nowrap}.back-subjects:hover{color:var(--coral)}.resource-toolbar{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:25px;padding-bottom:20px;border-bottom:1px solid var(--line)}.filters{display:flex;gap:6px}.filters button{border:0;border-radius:30px;padding:7px 15px;color:var(--muted);background:none;font-size:11px}.filters button[aria-pressed=true]{background:var(--ink);color:var(--white)}.filters button:hover{background:#eee1db;color:var(--ink)}.filters button[aria-pressed=true]:hover{background:var(--ink);color:white}.search{display:flex;align-items:center;gap:10px;border-bottom:1px solid #d2c3bf;padding:6px 0;min-width:215px}.search>span{font-size:21px;line-height:1}.search input{background:none;border:0;color:var(--ink);width:100%;font-size:11px;outline:none}.search input::placeholder{color:var(--muted)}.labs{display:grid;grid-template-columns:repeat(3,1fr);gap:28px 25px}.lab-cover{position:relative;padding:0;border:none;border-radius:8px;background:none;width:100%;overflow:hidden;aspect-ratio:1.6}.lab-cover img{height:100%;width:100%;object-fit:cover;transition:transform .45s}.lab-cover:hover img{transform:scale(1.035)}.lab-cover>span{position:absolute;right:13px;bottom:13px;background:#fffefaf0;border-radius:50%;width:29px;height:29px;display:grid;place-items:center;color:var(--ink);font-size:15px}.lab-caption{padding:10px 0 0}.lab-caption>span{color:var(--muted);font-size:9px}.lab-caption h3{margin:2px 0 5px;font-weight:500;font-size:16px}.lab-caption h3 button{border:0;background:none;padding:0;font:inherit;color:inherit}.lab-caption h3 button:hover{color:var(--coral)}.lab-caption p{font-size:10px;color:var(--muted);margin:0}.empty{grid-column:1/-1;text-align:center;padding:50px 20px;font-size:12px;color:var(--muted);border:1px solid var(--line);border-radius:8px}dialog{width:min(550px,calc(100vw - 32px));max-height:calc(100dvh - 40px);overflow:auto;padding:35px;border:1px solid #ded0cc;border-radius:14px;color:var(--ink);background:var(--paper);box-shadow:0 20px 70px #301d3333}dialog::backdrop{background:#36212d5c;backdrop-filter:blur(4px)}dialog .close{position:absolute;right:13px;top:10px;font-size:26px;line-height:1;width:30px;height:30px;border:0;background:none;color:var(--muted)}dialog .close:hover{color:var(--coral)}dialog h2{font-family:var(--serif);font-size:27px;margin:0 0 16px;line-height:1.5}.modal-copy{font-size:12px;line-height:1.9;color:var(--muted)}.modal-fine{font-size:10px;color:var(--muted)}.coming-illustration{height:180px;background:#f4ece5;border-radius:8px;margin:18px 0}.coming-illustration img{width:100%;height:100%;object-fit:contain}.modal-actions{display:flex;justify-content:flex-end;gap:12px;margin-top:25px}.modal-actions .btn{font-size:11px;padding:10px 17px;gap:18px}.lab-preview-image{border-radius:8px;width:100%;max-height:260px;object-fit:cover}
@media(max-width:1230px){main,footer{margin-left:40px;margin-right:40px}}@media(max-width:900px){nav{margin-left:0}.platform-art{width:260px;right:20px;top:160px}.platform h1{font-size:56px}.labs{grid-template-columns:repeat(2,1fr)}.physics-intro h1{font-size:36px}.resource-toolbar{display:block}.search{width:250px;margin-top:20px}footer i{display:none}}
@media(max-width:600px){header{height:80px}.header-inner{padding:0 21px;gap:15px;position:relative}.brand{gap:7px}.brand .mark{width:30px;height:30px}.brand .wordmark{width:88px;height:25px}nav{margin-left:auto;gap:19px}nav a{font-size:11px}nav a.active:after{bottom:13px;width:4px;height:4px}.preview-back{display:none}main,footer{margin-left:22px;margin-right:22px}.crumbs{font-size:9px;padding-top:22px;gap:8px}.eyebrow{font-size:9px;letter-spacing:1.3px}.btn{font-size:11px;min-height:43px;padding:10px 17px;gap:25px}.availability-note{font-size:9px;line-height:1.9;align-items:start;padding:21px 0 26px}.availability-note>span{margin-top:7px}footer{display:block;padding:22px 0 25px;font-size:16px}footer i{display:block;font-size:9px;margin:9px 0 0}footer small{display:block;margin-top:16px;font-size:8px}.platform{padding:45px 0 30px;min-height:0}.platform h1{font-size:48px;margin-bottom:20px}.platform-copy{font-size:12px}.platform-art{position:relative;right:auto;top:auto;width:165px;margin:38px auto 30px}.platform-art:before{inset:-15px}.platform-subjects{gap:24px;justify-content:space-between;margin-top:34px}.platform-subjects>span{font-size:11px}.platform-subjects small{font-size:8px}.physics-intro{display:block;padding:29px 0 25px}.physics-intro h1{font-size:34px;line-height:1.5;letter-spacing:-.7px}.physics-intro h1 span{display:block}.physics-intro p:not(.eyebrow){font-size:11px}.back-subjects{font-size:10px;display:inline-block;margin:20px 0 0}.resource-toolbar{padding-bottom:19px;margin-bottom:22px}.filters{gap:3px;flex-wrap:wrap}.filters button{padding:7px 12px;font-size:10px}.search{margin-top:18px;width:100%;min-width:0}.labs{grid-template-columns:1fr;gap:25px}.lab-cover{aspect-ratio:1.7}.lab-caption h3{font-size:16px}.lab-caption p{font-size:10px}.lab-caption>span{font-size:9px}dialog{padding:29px 22px;border-radius:11px;width:calc(100vw - 28px)}dialog h2{font-size:24px}.modal-copy{font-size:11px}.coming-illustration{height:155px}.modal-actions{gap:10px;justify-content:space-between;margin-top:22px}.modal-actions .btn{font-size:10px;padding:9px 13px;gap:13px}.modal-fine{font-size:9px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}