:root{--ink:#173d45;--muted:#647675;--accent:#a08054;--line:#cbd6d1;--paper:#faf9f5;--pad:clamp(24px,6vw,90px)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.85 "Microsoft YaHei","PingFang SC",sans-serif}a{color:inherit}button{font:inherit}img{max-width:100%}section[id]{scroll-margin-top:95px}
header{position:sticky;top:0;z-index:30;background:#faf9f5f5;display:flex;align-items:center;gap:28px;padding:12px var(--pad);height:78px;border-bottom:1px solid var(--line)}.logo{width:170px;flex:none}.logo img{width:100%;display:block}header nav{display:flex;gap:25px;margin-left:auto}nav a{text-decoration:none;font-size:13px}.header-label{font-size:11px;color:var(--muted)}nav a.active{color:var(--accent)}
.hero{padding:55px var(--pad);display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:55px;align-items:center;min-height:700px;background:#f3f1ea}.hero>*{min-width:0}.hero h1{font-size:clamp(38px,4vw,62px);line-height:1.3;letter-spacing:-.04em;font-weight:500;margin:26px 0}.eyebrow{font:11px/1.6 monospace;letter-spacing:.1em;color:var(--accent)}.subtitle{font-size:20px}.hero-copy>p{color:var(--muted)}.hero-image{height:600px;position:relative}.hero-image .photo{height:100%}.image-note{position:absolute;bottom:20px;left:20px;color:#fff;font-size:11px;text-shadow:0 1px 5px #000}.hero-index{display:flex;gap:25px;margin-top:45px;font-size:12px;color:var(--muted)}
.photo{display:block;width:100%;padding:0;border:0;background:none;cursor:zoom-in;overflow:hidden;min-width:0}.photo img{display:block;width:100%;height:100%;object-fit:cover}.link{display:inline-flex;gap:22px;margin-top:20px;text-decoration:none;border-bottom:1px solid;padding:8px 0;font-size:14px}
.quick{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));padding:0 var(--pad);border-bottom:1px solid var(--line)}.quick a{padding:30px 20px;text-decoration:none;border-right:1px solid var(--line)}.quick a:first-child{padding-left:0}.quick a:last-child{border:0}.quick small,.quick strong,.quick span{display:block}.quick small{font:11px monospace;color:var(--accent)}.quick strong{font-size:20px;font-weight:500;margin:13px 0 5px}.quick span{font-size:13px;color:var(--muted)}
.section{padding:100px var(--pad)}.soft{background:#eaf0ec}.heading{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:65px;align-items:end;margin:30px 0 55px}.heading>*{min-width:0}.heading h2{font-size:clamp(36px,4.3vw,62px);line-height:1.3;font-weight:500;letter-spacing:-.035em;margin:0}.heading p{margin:0;color:var(--muted);text-wrap:pretty}.heading .lead{font-size:21px;color:var(--ink);margin-bottom:15px}
.reasons{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-block:1px solid var(--line)}.reasons article{padding:28px 20px;border-right:1px solid var(--line)}.reasons small{color:var(--accent)}h3{font-weight:600}.reasons h3{font-size:19px;margin:24px 0 10px}.reasons p,.services p{font-size:15px;color:var(--muted);margin:0;line-height:1.9}.services{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid var(--line)}.services article{display:grid;grid-template-columns:40px minmax(0,1fr);gap:15px;padding:26px 24px;border-bottom:1px solid var(--line)}.services article:nth-child(odd){border-right:1px solid var(--line)}.services span{font:12px monospace;color:var(--accent)}.services h3{font-size:22px;margin:0 0 8px}.fine{font-size:12px;color:var(--muted);line-height:1.8}
.feature{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:65px;align-items:center;margin:60px 0}.feature>*{min-width:0}.feature .photo{height:400px}.feature h3{font-size:33px;line-height:1.5;margin:20px 0}.feature small{font:11px monospace;color:var(--accent)}.feature p{color:var(--muted)}.steps{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));padding:0;list-style:none;counter-reset:step;margin:60px 0;border-top:1px solid var(--line)}.steps li{counter-increment:step;padding:25px 15px;border-right:1px solid var(--line)}.steps li:before{content:"0" counter(step);font:12px monospace;color:var(--accent)}.steps h3{font-size:18px}.steps p{font-size:14px;color:var(--muted)}
details{border-top:1px solid var(--line)}details:last-of-type{border-bottom:1px solid var(--line)}summary{display:flex;align-items:center;justify-content:space-between;gap:24px;list-style:none;cursor:pointer;min-height:88px;padding:24px 0}summary::-webkit-details-marker{display:none}.detail-title{min-width:0;flex:1;font-size:21px;font-weight:600;line-height:1.6;overflow-wrap:break-word}.detail-action{display:flex;align-items:center;justify-content:center;gap:12px;flex:none;min-width:120px;padding:10px 15px;border:1px solid currentColor;border-radius:3px;font-size:13px;white-space:nowrap}.action-icon{font-size:26px;line-height:24px}.detail-body{padding:8px 0 30px 25px;margin:0 0 24px;border-left:2px solid var(--line);font-size:16px;line-height:1.95;color:#4a6263;max-width:920px}.detail-body h4{color:var(--ink);font-size:22px;line-height:1.55;margin:28px 0 12px}.detail-body h4:first-child{margin-top:0}.detail-body h4 small{font:12px monospace;margin-right:15px;color:var(--accent)}.detail-body p{margin:8px 0 16px;max-width:66ch;text-wrap:pretty;overflow-wrap:break-word}.detail-body strong{color:var(--ink)}details[open] summary{border-bottom:1px solid var(--line);margin-bottom:25px}.reading-details{margin-top:40px}
.material-row>div:first-child{display:none}
.two-images{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:24px}.two-images figure{margin:0;min-width:0}.two-images .photo{height:360px}.two-images figcaption{font-size:12px;color:var(--muted);margin-top:10px}.series{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin:45px 0;border-block:1px solid var(--line)}.series>div{padding:20px;border-right:1px solid var(--line)}.series h3{font-size:25px;margin:0}.series p{font-size:14px;color:var(--muted)}.compact{margin:40px 0 20px}.compact h3{font-size:27px;margin:0}.care-stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-block:1px solid var(--line);margin:40px 0}.care-stats>div{padding:25px 15px;border-right:1px solid var(--line)}.care-stats b{font-size:34px;font-weight:500}.care-stats p{font-size:14px;color:var(--muted)}.care-copy{margin:40px 0}.care-copy h3{font-size:25px}.care-copy p{max-width:760px;color:var(--muted)}
.end{background:var(--ink);color:#eff3ef}.end>img{width:200px;filter:brightness(0) invert(1);margin-bottom:45px}.end h2{font-size:54px;font-weight:400;line-height:1.4}.end p,.end .detail-body{color:#cbd8d1}.end .detail-body h4,.end strong{color:#fff}footer{padding:30px var(--pad);font-size:11px;color:var(--muted);display:flex;justify-content:space-between;gap:20px}.bottom-nav{display:none}.progress{position:fixed;top:0;left:0;right:0;height:3px;z-index:50}.progress i{display:block;height:100%;background:var(--accent)}
.viewer{padding:0;margin:0;border:0;background:#10282d;width:100vw;height:100vh;max-width:none;max-height:none}.viewer[open]{display:grid;place-items:center}.viewer>img{max-width:88vw;max-height:84vh;object-fit:contain}.viewer button{position:absolute;color:white;border:0;background:#ffffff22}.close{right:20px;top:15px;font-size:35px}.prev,.next{top:45%;font-size:45px;padding:8px 20px}.prev{left:10px}.next{right:10px}.viewer p,.viewer i{position:absolute;bottom:30px;color:white;text-align:center;width:100%;font-size:13px}.viewer i{bottom:12px;font-size:11px}
@media(max-width:900px){:root{--pad:22px}body{padding-bottom:65px;font-size:15px}header{height:64px;padding:10px 22px}.logo{width:148px}header nav,.header-label{display:none}.hero{display:flex;flex-direction:column;gap:30px;padding-top:35px;min-height:0}.hero-copy{width:100%}.hero h1{font-size:clamp(31px,8.7vw,47px);line-height:1.4;letter-spacing:-.03em}.subtitle{font-size:18px}.hero-copy p{font-size:14px}.hero-image{width:100%;height:350px}.hero-index{margin-top:30px}.quick{display:block}.quick a{display:block;border-right:0;border-bottom:1px solid var(--line);padding:22px 0}.section{padding-top:65px;padding-bottom:65px}.heading{display:block;margin:25px 0 35px}.heading h2{font-size:36px;margin-bottom:25px}.heading p{font-size:15px}.heading .lead{font-size:19px}.reasons{grid-template-columns:repeat(2,minmax(0,1fr))}.reasons article{padding:20px 15px}.reasons h3{font-size:18px}.reasons p,.services p{font-size:14px}.services{grid-template-columns:minmax(0,1fr)}.services article{padding:23px 0;grid-template-columns:35px minmax(0,1fr)}.services article:nth-child(odd){border-right:0}.feature{display:flex;flex-direction:column;gap:25px;margin:40px 0}.feature>*{width:100%}.feature .photo{height:280px;order:-1}.feature h3{font-size:27px}.steps{grid-template-columns:repeat(2,minmax(0,1fr))}.steps li{border-bottom:1px solid var(--line)}.steps h3{font-size:17px}.steps p{font-size:13px}.two-images{grid-template-columns:minmax(0,1fr)}.two-images .photo{height:280px}.series{grid-template-columns:repeat(2,minmax(0,1fr))}.care-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.detail-title{font-size:18px}.detail-action{min-width:104px;font-size:12px;padding:10px;gap:7px}summary{gap:15px;min-height:86px}.detail-body{font-size:15px;padding-left:15px}.detail-body h4{font-size:20px}.material-image{margin:30px auto 45px}.end h2{font-size:35px}.bottom-nav{position:fixed;bottom:0;left:0;right:0;z-index:40;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));background:var(--ink);height:64px;margin:0;gap:0}.bottom-nav a{display:grid;place-items:center;color:#fff;border-right:1px solid #ffffff33;font-size:13px}footer{display:block}.fine{font-size:12px}section[id]{scroll-margin-top:78px}}
.detail-title,.detail-body,.services article>div{min-width:0}
.detail-body p,.feature p,.heading p,.services p{line-height:1.95;text-wrap:pretty}
.feature .photo{height:auto;aspect-ratio:16/10}
.two-images .photo{height:auto;aspect-ratio:16/10}
.fine{font-size:13px;line-height:1.85}
summary:hover .detail-action,summary:focus-visible .detail-action{background:var(--ink);color:#fff}
@media(max-width:900px){.hero-image{height:auto;aspect-ratio:4/3}.hero-image .photo{height:100%;aspect-ratio:4/3}.feature .photo,.two-images .photo{height:auto;aspect-ratio:4/3}.fine{font-size:13px}.detail-body{font-size:16px}.heading h2{font-size:clamp(29px,7.5vw,36px)}.bottom-nav{height:calc(64px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom)}body{padding-bottom:calc(65px + env(safe-area-inset-bottom))}}
@media(max-width:420px){summary{gap:10px;align-items:flex-start}.detail-title{font-size:17px;line-height:1.7}.detail-action{min-width:94px;font-size:12px;padding:9px 8px}.reasons article{padding:18px 12px}.hero-index{gap:18px}.series>div{padding:17px 12px}}
.configuration-table{width:100%;border-collapse:collapse;font-size:15px;text-align:left}.configuration-table caption{text-align:left;font-size:20px;font-weight:600;color:var(--ink);padding:10px 0 20px}.configuration-table th,.configuration-table td{padding:16px 12px;border-bottom:1px solid var(--line);vertical-align:top}.configuration-table thead{background:#173d4509}.configuration-table tbody th{font-weight:500;white-space:nowrap}.table-scroll{max-width:100%;margin:15px 0 25px}@media(max-width:900px){.configuration-table{font-size:14px}.configuration-table th,.configuration-table td{padding:14px 8px}.configuration-table caption{font-size:19px}}
.material-story{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:55px;align-items:center}.material-copy{min-width:0}.material-copy h3{font-size:32px;line-height:1.5;font-weight:500}.material-points{list-style:none;padding:0;margin:28px 0;border-top:1px solid var(--line)}.material-points li{display:grid;grid-template-columns:120px minmax(0,1fr);gap:15px;padding:14px 0;border-bottom:1px solid var(--line);font-size:14px}.material-points span{color:var(--muted)}.material-story .material-image{width:100%;aspect-ratio:16/9;height:auto;margin:0;border-radius:2px}.material-story .material-image img{object-fit:cover}.process-head{max-width:680px;margin:70px 0 25px}.process-head h3{font-size:31px;margin:12px 0 6px;font-weight:500}.process-head p:last-child{color:var(--muted);margin:0}.process-axis{position:relative;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:0;margin:0 0 35px;border-top:0;counter-reset:step}.process-axis:before{content:"";position:absolute;left:0;right:0;top:17px;height:1px;background:var(--accent)}.process-axis li{position:relative;z-index:1;padding:45px 18px 20px 0;border:0;border-right:1px solid var(--line);margin-right:18px}.process-axis li:last-child{border-right:0}.process-axis li:before{display:grid;place-items:center;width:35px;height:35px;border:1px solid var(--accent);border-radius:50%;background:var(--paper);font-size:12px}.process-axis h3{font-size:19px;margin:20px 0 8px}.process-axis p{font-size:14px;color:var(--muted);line-height:1.8;margin:0}.process-axis small{display:block;margin-top:12px;color:var(--accent);font-size:11px}@media(max-width:900px){.material-story{display:flex;flex-direction:column;gap:28px}.material-copy h3{font-size:28px}.material-story .material-image{order:-1;aspect-ratio:16/10}.material-points li{grid-template-columns:100px minmax(0,1fr)}.process-head{margin:45px 0 20px}.process-head h3{font-size:27px}.process-axis{display:block;border-left:1px solid var(--line);border-top:0;margin-left:4px}.process-axis:before{left:-1px;right:auto;top:0;bottom:0;width:1px;height:auto}.process-axis li{margin:0;padding:14px 0 22px 38px;border:0}.process-axis li:before{position:absolute;left:-18px;top:9px}.process-axis h3{margin:8px 0;font-size:19px}.process-axis p{font-size:14px}.process-axis small{margin-top:8px}.material-story .facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}}
.material-story>div.material-copy:first-child{display:block}.material-story .facts{display:flex;gap:26px;font-size:12px}.material-story .facts b{display:block;font-size:23px;font-weight:500}.process-axis li{padding-top:0}.process-axis li:before{position:relative}.process-axis li small{font-size:12px}@media(max-width:900px){.process-axis li{padding-top:14px}.process-axis li:before{position:absolute}.material-story .facts{gap:24px}}
.detail-body{max-width:none;padding:0 0 30px;border-left:0}.detail-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin:24px 0 0}.detail-grid[data-count="2"]{grid-template-columns:repeat(2,minmax(0,1fr))}.detail-card{min-width:0;padding:24px;background:#173d4505;border-top:2px solid #a0805466}.detail-card-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:18px}.detail-icon{flex:none;width:38px;height:38px;display:grid;place-items:center;color:var(--accent);background:#a0805410;border-radius:6px}.detail-icon svg{width:24px;height:24px}.detail-body .detail-card h4{font-size:20px;margin:3px 0 0;line-height:1.6}.detail-card-copy p{font-size:15px;line-height:1.95;margin:0 0 13px;max-width:none}.detail-card-copy p:last-child{margin-bottom:0}.detail-card-copy .detail-support{color:var(--ink);font-size:16px;font-weight:500}.detail-intro{margin:0 0 20px}.end .detail-card{background:#ffffff06;border-top-color:#bca582}.end .detail-card-copy .detail-support{color:#eff3ef}.end .detail-icon{color:#d0b489;background:#ffffff09}@media(min-width:901px) and (max-width:1150px){.detail-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:900px){.detail-grid,.detail-grid[data-count="2"]{grid-template-columns:minmax(0,1fr);gap:15px;margin-top:22px}.detail-card{padding:20px}.detail-body .detail-card h4{font-size:19px}.detail-card-copy p{font-size:16px}.detail-card-head{margin-bottom:14px;gap:12px}.detail-icon{width:34px;height:34px}.detail-icon svg{width:22px;height:22px}}
.material-story{grid-template-columns:minmax(0,.82fr) minmax(0,1.18fr)}.material-story .material-image{aspect-ratio:72/49;max-width:none;justify-self:stretch;margin:0}.material-story .material-image img{object-fit:contain}.silver-section{background:#efeee6}.silver-feature{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);gap:48px;align-items:center}.silver-feature .photo{aspect-ratio:4/3}.silver-copy h3{font-size:29px;font-weight:500;line-height:1.5}.silver-copy p{color:var(--muted)}@media(max-width:900px){.material-story .material-image{aspect-ratio:72/49;width:100%;order:-1}.silver-feature{grid-template-columns:minmax(0,1fr);gap:25px}.silver-feature .photo{aspect-ratio:4/3}.silver-copy h3{font-size:26px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}