:root{--bg:#f6f9fb;--ink:#1f2d3a;--muted:#536572;--brand:#0e7a6a;--line:#dce7ec;--card:#fff}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:1rem/1.8 "Microsoft YaHei","PingFang SC",sans-serif}a{color:var(--brand);text-underline-offset:.2em}a:focus-visible,summary:focus-visible{outline:3px solid #e4a02e;outline-offset:4px}header{background:#fff;border-bottom:1px solid var(--line)}.wrap{width:min(1100px,100% - 40px);margin:auto}.nav{min-height:78px;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;padding-block:14px}.brand{font-size:1.5rem;font-weight:750;letter-spacing:-.04em;text-decoration:none}.brand small{display:block;font-size:.875rem;letter-spacing:0;font-weight:400;color:var(--muted)}nav{display:flex;flex-wrap:wrap;gap:12px 22px}nav a{font-size:.9375rem;text-decoration:none}nav a[aria-current=page]{font-weight:700;border-bottom:2px solid var(--brand)}.skip{position:absolute;left:-9999px}.skip:focus{left:12px;top:8px;background:#fff;z-index:10}main{padding:44px 0 64px}h1,h2,h3{line-height:1.35}h1{font-size:clamp(2rem,4.8vw,3.4rem);letter-spacing:-.04em;margin:.3em 0 .5em}h2{font-size:1.6rem;margin:0 0 18px}h3{font-size:1.1rem;margin:0 0 10px}p{margin:0 0 16px}section{padding:34px 0;border-top:1px solid var(--line)}.eyebrow,.meta,.source,figcaption{font-size:.875rem;color:var(--muted)}.eyebrow{color:var(--brand);font-weight:700;letter-spacing:.06em}.lead{font-size:1.15rem;color:var(--muted);max-width:780px}.hero-grid{display:grid;grid-template-columns:1.45fr 1fr;gap:42px;align-items:center;margin-bottom:48px}.product-hero{margin:0;padding:20px;background:#fff;border:1px solid var(--line);border-radius:18px}.product-hero img{display:block;width:100%;height:320px;object-fit:contain}figcaption{margin-top:14px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.button{padding:12px 20px;background:var(--brand);color:white;border:1px solid var(--brand);border-radius:7px;text-decoration:none;font-weight:700}.secondary{background:transparent;color:var(--brand)}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.card{display:block;padding:24px;border:1px solid var(--line);border-radius:12px;background:white;text-decoration:none;color:var(--ink)}.card:hover{border-color:var(--brand)}.card p{color:var(--muted)}.card span{font-size:.9375rem;color:var(--brand);font-weight:600}.table-wrap{overflow-x:auto;margin:24px 0;border:1px solid var(--line);border-radius:9px}table{border-collapse:collapse;width:100%;background:#fff}th,td{text-align:left;vertical-align:top;padding:16px;border-bottom:1px solid var(--line);min-width:145px}th{background:#eaf4f1}tbody tr:last-child td{border-bottom:0}.source{overflow-wrap:anywhere;margin-top:18px}.notice{background:#eef5f8;border-left:4px solid var(--brand);padding:20px;margin:12px 0 22px}.notice p{margin:6px 0 0}.crumb{font-size:.875rem;margin-bottom:24px}.page-head{margin-bottom:30px}footer{background:#14262f;color:#c8d5db;padding:30px 0}footer a{color:#a3e4d9}footer p{font-size:.875rem;margin-bottom:8px}ul,ol{padding-left:1.4em}li{margin-bottom:9px}.footer-links{display:flex;gap:18px;flex-wrap:wrap;margin:14px 0}@media(max-width:700px){.wrap{width:calc(100% - 32px)}.hero-grid{grid-template-columns:1fr;gap:24px}.product-hero img{height:250px}.cards{grid-template-columns:1fr}.nav{align-items:flex-start}nav{gap:10px 15px}main{padding-top:28px}.card{padding:20px}th,td{padding:12px;min-width:125px}section{padding:28px 0}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.model-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.model-card{margin:0;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:14px}
.model-picture{display:block;background:#f3f3f3}.model-picture img{display:block;width:100%;height:280px;object-fit:contain}
.model-card figcaption{padding:20px;margin:0}.model-card h3{color:var(--ink);overflow-wrap:anywhere}
.model-card p{margin:0 0 10px}.model-card p:last-child{margin:0}.model-capacity{font-weight:600;color:var(--brand)}
.model-grid:has(>.model-card:only-child){max-width:400px;grid-template-columns:1fr}
@media(max-width:850px){.model-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:520px){.model-grid{grid-template-columns:1fr}.model-picture img{height:260px}}

.product-menu{position:relative}.product-menu summary{cursor:pointer;color:var(--brand);font-size:.9375rem;list-style:none}.product-menu summary:after{content:" ▾"}.product-menu[open] summary:after{content:" ▴"}
.product-menu-panel{position:absolute;top:calc(100% + 16px);left:0;width:min(620px,85vw);max-height:70vh;overflow:auto;z-index:50;background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:0 15px 40px #14262f22;display:grid;grid-template-columns:1fr 1fr;gap:20px}
.product-menu-group>a{font-weight:700;display:block;margin-bottom:8px}.product-menu-group>div{display:flex;flex-wrap:wrap;gap:8px}.product-menu-group>div a,.variant-links a{background:#edf6f3;border-radius:6px;padding:5px 10px;font-size:.875rem}
.variant-links{display:flex;flex-wrap:wrap;gap:12px;margin:20px 0}.variant-detail{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:32px}.variant-detail figure{margin:0}.variant-detail img{display:block;width:100%;height:auto;max-height:480px;object-fit:contain;background:white}.variant-detail h3{margin-top:18px}section[id]{scroll-margin-top:25px}
@media(max-width:700px){.nav{position:relative}nav .product-menu{position:static}.product-menu-panel{left:0;right:0;top:100%;width:100%;box-sizing:border-box;grid-template-columns:1fr;max-height:65vh}.variant-detail{grid-template-columns:1fr;gap:18px}}

:root{--bg:#fff;--ink:#152d3e;--muted:#536674;--brand:#127b91;--line:#dfe8ec;--card:#fff}
body{font-family:"Microsoft YaHei","PingFang SC",sans-serif;line-height:1.85}header{border-bottom:1px solid var(--line)}.wrap{width:min(1200px,100% - 64px)}.nav{min-height:90px}.brand{font-size:1.85rem;color:#173d53}.brand small{font-size:.75rem;letter-spacing:.08em}nav{align-items:center;gap:22px}nav>a{font-size:.9rem}.product-menu summary{font-size:.9rem}.product-menu-panel a{font-size:.9rem}
main{padding-top:32px}h1{font-size:clamp(2rem,4.3vw,3.65rem);letter-spacing:-.025em;font-weight:700}h2{font-size:clamp(1.35rem,2.4vw,2rem);font-weight:650}.lead{font-size:1.06rem;max-width:780px}.eyebrow{font-size:.75rem;letter-spacing:.15em;font-weight:650}
.hero-grid{background:linear-gradient(115deg,#eef5f8 0%,#f4f7f8 65%,#e4eef3 100%);border-radius:6px;padding:44px 48px;grid-template-columns:1.2fr 1fr;gap:36px;margin-bottom:40px;min-height:450px}.product-hero{background:transparent;border:0;padding:0}.product-hero img{height:380px;mix-blend-mode:multiply}.product-hero figcaption{font-size:.72rem}.actions .button{border-radius:4px;font-size:.9rem;padding:11px 21px}.button.secondary{background:white}
section{padding:40px 0}.model-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.model-card{border-radius:5px;border:1px solid #e4e9ec}.model-picture img{height:245px;transition:transform .2s}.model-picture:hover img{transform:scale(1.035)}.model-card figcaption{padding:17px}.model-card h3{font-size:1rem;min-height:2.7em}.model-card p{font-size:.83rem}.model-card p:last-child a{font-size:.82rem}.model-capacity{color:#385769}
.cards{gap:14px}.card{border-radius:5px;padding:22px}.card h3{font-size:1rem}.card p{font-size:.9rem}.card span{font-size:.83rem}.page-head{padding:14px 0 22px;border-bottom:1px solid var(--line)}.page-head h1{font-size:clamp(1.8rem,3.8vw,2.7rem)}.crumb{font-size:.8rem}.variant-links a{padding:9px 18px;border:1px solid #d8e3e8;border-radius:4px;background:#f3f7f9;text-decoration:none}.variant-detail{gap:45px}.variant-detail figure{background:#f7f9fa;padding:20px;align-self:start;border-radius:5px}.variant-detail figcaption{font-size:.78rem}
.product-info{border-bottom:1px solid var(--line)}.product-info summary{cursor:pointer;font-size:1rem;font-weight:650;padding:16px 0}.product-info>div{padding:0 0 15px}.product-info p{font-size:.94rem}
.qa-categories{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0}.qa-categories a{background:#eef5f8;padding:9px 18px;text-decoration:none;border-radius:4px;font-size:.9rem}.qa-item{border-bottom:1px solid var(--line);scroll-margin-top:30px}.qa-item summary{padding:19px 32px 19px 0;cursor:pointer;position:relative;font-size:1rem;font-weight:600;list-style:none}.qa-item summary:after{content:"+";position:absolute;right:5px;font-weight:400;font-size:1.25rem}.qa-item[open] summary:after{content:"−"}.qa-answer{padding:0 25px 12px 0;max-width:850px}.qa-answer p{font-size:.94rem}.qa-answer a{font-size:.86rem}.qa-teaser{display:grid;grid-template-columns:1fr 1.3fr;gap:45px;background:#f2f7f9;padding:32px;border-radius:5px}.qa-teaser h2{line-height:1.5}.qa-teaser>div>a{font-size:.9rem}
footer{background:#132f42;padding:38px 0}footer a{font-size:.87rem}.footer-links{gap:25px}
@media(max-width:1000px){.model-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.hero-grid{padding:30px}.hero-grid h1{font-size:2.6rem}}
@media(max-width:700px){.wrap{width:calc(100% - 32px)}.nav{min-height:74px;gap:16px}.nav nav{gap:15px;flex-wrap:wrap;width:100%;align-items:center}.hero-grid{grid-template-columns:1fr;padding:25px 22px;gap:20px;min-height:0}.hero-grid h1{font-size:2.3rem}.product-hero img{height:260px}.model-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.model-picture img{height:200px}.model-card figcaption{padding:12px}.qa-teaser{grid-template-columns:1fr;padding:22px;gap:20px}.variant-detail{gap:20px}.product-menu-panel{top:100%}section{padding:28px 0}}
@media(max-width:380px){.model-grid{grid-template-columns:1fr}.model-picture img{height:250px}}
@media(prefers-reduced-motion:reduce){.model-picture img{transition:none}}