:root{--paper:#f3f0e9;--ink:#171a1d;--warm:#8b8174;--cyan:#167c88;--amber:#b76420;--lime:#5c7720;--line:rgba(23,26,29,.2);--wrap:min(1240px,calc(100% - 72px));font-family:"Microsoft YaHei UI","PingFang SC",system-ui,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);overflow-x:hidden}img{display:block;width:100%;height:auto}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.wrap{width:var(--wrap);margin-inline:auto}.skip-link{position:fixed;z-index:1000;left:16px;top:-80px;background:var(--ink);color:var(--paper);padding:12px 18px;font-weight:900}.skip-link:focus{top:16px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.site-header{height:82px;padding:0 max(36px,calc((100vw - 1240px)/2));display:flex;align-items:center;justify-content:space-between;background:rgba(243,240,233,.97);border-bottom:1px solid var(--line);position:relative;z-index:30}.brand{min-height:44px;display:flex;align-items:center;gap:13px}.brand strong{font-size:15px;letter-spacing:.04em}.brand-mark{width:52px;height:38px}.brand-mark circle:nth-child(1){fill:#33b9c7}.brand-mark circle:nth-child(2){fill:#d8863b}.brand-mark circle:nth-child(3){fill:#b9e56c}.brand-mark path{fill:none;stroke:var(--ink);stroke-width:2}.site-nav{display:flex;align-items:center;gap:28px;font-size:14px;font-weight:800}.site-nav a{min-height:44px;display:flex;align-items:center;border-bottom:2px solid transparent}.site-nav a:hover,.site-nav a:focus-visible{border-color:var(--cyan)}.nav-contact{padding-inline:18px;background:var(--ink);color:var(--paper);border-color:var(--ink)!important}.menu-toggle{display:none;width:48px;height:48px;border:1px solid var(--ink);background:none;position:relative}.menu-toggle span:not(.sr-only){position:absolute;left:13px;width:20px;height:2px;background:var(--ink)}.menu-toggle span:nth-child(2){top:18px}.menu-toggle span:nth-child(3){top:27px}.section-no,.kicker,.material-band span,.flow-stage span,.specimen-sheet span,.application-study span,.record-lines span{font:900 11px/1.35 ui-monospace,Consolas,monospace;letter-spacing:.13em}.section-no{color:var(--cyan)}h1,h2,h3,p{margin-top:0}h2{font:700 clamp(42px,5.6vw,80px)/.98 Georgia,"Songti SC",serif;letter-spacing:-.055em;margin:0}.button{min-height:54px;padding:0 24px;display:inline-flex;align-items:center;justify-content:center;font-weight:900;border:1px solid currentColor}.button-cyan{background:var(--cyan);color:#fff;border-color:var(--cyan)}.text-link{min-height:48px;display:flex;align-items:center;gap:12px;border-bottom:1px solid currentColor}.reveal{opacity:0;transform:translateY(22px);transition:opacity .65s cubic-bezier(.16,1,.3,1),transform .65s cubic-bezier(.16,1,.3,1)}.reveal.is-visible{opacity:1;transform:none}:focus-visible{outline:3px solid var(--amber);outline-offset:4px}
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.records{min-height:820px;position:relative;color:#fff;background:#18251e}.records>img{position:absolute;inset:0;height:100%;object-fit:cover}.records-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(16,28,21,.97),rgba(16,28,21,.78) 56%,rgba(16,28,21,.18))}.records-copy{position:relative;padding-top:110px;padding-bottom:110px}.records .section-no{color:#cce98e}.records h2{max-width:900px;margin:26px 0 62px}.record-lines{max-width:900px;display:grid;grid-template-columns:1fr 1fr;gap:44px}.record-lines article{padding-top:24px;border-top:2px solid #9bc34d}.record-lines span{color:#d9eeaa}.record-lines h3{font-size:27px;margin:16px 0}.record-lines p{line-height:1.85;color:#e0e4df}
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@media(max-width:720px){:root{--wrap:calc(100% - 32px)}html{scroll-behavior:auto}.site-header{height:72px;padding-inline:16px}.brand strong{font-size:13px}.brand-mark{width:42px}.menu-toggle{display:block}.site-nav{display:none;position:absolute;left:0;right:0;top:72px;background:var(--paper);padding:12px 20px 18px;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0}.site-nav.is-open{display:flex}.site-nav a{min-height:46px;padding:0 4px}.site-nav .nav-contact{justify-content:center;margin-top:6px}.hero{height:700px;min-height:calc(100vh - 72px)}.hero-copy{padding-top:78px}.hero h1{font-size:clamp(48px,15vw,68px);line-height:.9;margin:20px 0 26px}.hero-copy>p:not(.kicker){font-size:15px}.hero-actions{align-items:flex-start;flex-direction:column;gap:14px}.hero-index{left:16px;right:16px;grid-template-columns:auto 1fr}.hero-index span{display:none}.position,.section-head,.condition-intro,.path-title{padding-block:76px;display:block}.position h2,.section-head h2,.condition-intro h2,.path-title h2{margin:18px 0 26px}.position>p:last-child,.section-head>p:last-child,.condition-intro>p:last-child{padding:0}.materials{padding:0 0 58px}.section-head{margin-bottom:0}.material-band,.material-band.reverse,.specimen-sheet,.application-study{width:100%;margin:0;display:flex;flex-direction:column;min-height:0}.material-band img,.specimen-sheet img,.application-study img{height:300px}.material-band>div,.specimen-sheet>div,.application-study>div{padding:34px 24px}.material-band.reverse img,.material-band.reverse>div,.application-study img,.application-study>div{grid-column:auto;grid-row:auto}.material-band.reverse{flex-direction:column}.path{padding-top:0}.path-title{margin-bottom:0}.flow-stage{min-height:610px}.flow-stage img{height:610px}.flow-stage>div{left:24px;right:24px;bottom:30px}.flow-stage h3{font-size:40px}.conditions{padding:0}.condition-intro{margin-bottom:0}.application-study{flex-direction:column-reverse}.records{min-height:960px}.records-copy{padding-top:78px}.records h2{margin:22px 0 44px}.record-lines{grid-template-columns:1fr;gap:32px}.contact{padding:78px 16px;grid-template-columns:1fr;gap:52px}.form-row{grid-template-columns:1fr}.site-footer{padding:30px 16px;grid-template-columns:1fr;gap:18px}.site-footer .brand{align-items:flex-start}.button,.text-link,.site-nav a{min-height:48px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition-duration:.001ms!important}.reveal{opacity:1;transform:none}}
:root{--cyan:#136f79}
.flow-light>div{background:rgba(243,240,233,.94);padding:24px}