@charset "UTF-8";
:root{--ink:#203c22;--text:#354237;--muted:#626d60;--paper:#f7f7ef;--line:#d9ddcf;--lime:#d4ef82;--green:#59981a;--white:#fff;--radius:3px;font-family:Arial,"Noto Sans",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:wait;opacity:.65}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible{outline:3px solid #59981a;outline-offset:4px}p{line-height:1.65;color:var(--text);margin:0 0 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span{font-size:1.1rem}.button.light{background:var(--lime);color:var(--ink);border-color:var(--lime)}.text-link{display:inline-flex;align-items:center;gap:20px;border-bottom:1px solid currentColor;padding:8px 0;font-size:.94rem;line-height:1.5}.text-link::after{content:'';width:15px;height:15px;flex-shrink:0;background:currentColor;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M5 19 19 5M5 5h14v14' fill='none' stroke='black' stroke-width='1.5'/%3E%3C/svg%3E") center/contain no-repeat}.text-link:hover{color:var(--green)}main{min-height:60vh}.home-hero{display:grid;grid-template-columns:1.1fr 1fr;border-bottom:1px solid var(--line);padding:0 clamp(20px,4.6vw,72px);gap:4vw;max-width:1800px;margin:auto}.hero-copy{padding:76px 0 28px;display:flex;flex-direction:column;align-items:flex-start}.hero-copy h1{max-width:670px}.hero-copy .lead{max-width:520px;font-size:1.03rem;margin:24px 0 30px}.actions{display:flex;align-items:center;gap:26px;flex-wrap:wrap}.hero-foot{margin-top:64px;padding-top:21px;border-top:1px solid var(--line);width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px}.hero-foot>span:first-child{font-size:1.08rem;white-space:nowrap}.hero-foot i{font-style:normal;color:#a4ac96;margin:0 10px}.hero-foot>span:last-child{font-size:.53rem;letter-spacing:.08em;color:var(--muted)}.hero-art{overflow:hidden;min-height:570px;background:#e8ebdf;position:relative;isolation:isolate}.hero-art::after{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 53% 48%,transparent 28%,#e8ebdf90 80%);z-index:-1}.art-caption{position:absolute;top:34px;left:32px;font-size:.59rem;letter-spacing:.14em;line-height:1.7;color:#58624a}.art-bottom{display:flex;justify-content:space-between;position:absolute;bottom:28px;left:32px;right:28px;font-size:.55rem;letter-spacing:.11em}.orbit{position:absolute;border:1px solid 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h3{font-size:2.2rem;margin-bottom:18px}.fine-print{font-size:.79rem;line-height:1.7;color:var(--muted)}.grade-copy .fine-print{max-width:470px}.approach{background:#ecefe3;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:38px}.steps article{border-top:1px solid #b8c3ab;padding-top:22px}.steps article>span{font-size:.7rem;color:var(--muted);letter-spacing:.1em}.steps h3{margin:34px 0 16px;font-size:1.45rem}.steps p{font-size:.92rem;margin:0;max-width:345px}.insight-list{display:grid;grid-template-columns:1fr 1fr;gap:40px}.insight-list article{border-top:1px solid var(--line);padding-top:27px}.insight-list .eyebrow{display:block;margin-bottom:25px;color:var(--muted)}.insight-list h3{font-size:1.9rem;max-width:550px;margin-bottom:19px}.insight-list h3 a:hover{text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:5px}.insight-list p{max-width:500px}.cta-band{background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:32px;padding:60px clamp(20px,4.6vw,72px)}.cta-band .eyebrow{color:#c2d4a9;margin-bottom:16px}.cta-band h2{font-size:2.3rem}.cta-band .button{flex-shrink:0}.page-heading{padding:66px clamp(20px,4.6vw,72px) 40px;max-width:1250px}.page-heading h1{font-size:clamp(2.6rem,4.6vw,4.7rem)}.page-heading .lead{max-width:800px}.compact{padding-top:24px}.detail-list article{border-top:1px solid var(--line);padding:35px 0;display:grid;grid-template-columns:70px 1fr;gap:20px}.detail-list article:last-child{border-bottom:1px solid var(--line)}.detail-list .list-no{font-size:.7rem;letter-spacing:.1em;margin-top:7px;color:var(--muted)}.detail-list h3{margin-bottom:12px;font-size:1.7rem}.detail-list p{max-width:790px;margin:0}.document-note{border-left:3px solid var(--green);padding:14px 24px;margin:34px 0 0;font-size:.88rem;max-width:800px}.version-note{margin:0 clamp(20px,4.6vw,72px) 64px;padding:36px 40px;background:#e9eddc;display:flex;align-items:flex-start;flex-direction:column;gap:18px}.version-note h2{font-size:1.9rem}.version-note p{margin:0;max-width:800px}.reading-body{max-width:850px;margin:0 auto;padding:10px 30px 65px}.reading-body section{margin-bottom:38px}.reading-body h2{font-size:1.7rem;margin:0 0 18px}.reading-body p{font-size:1.03rem;line-height:1.8}.article-links{display:flex;flex-wrap:wrap;gap:32px;border-top:1px solid var(--line);padding-top:24px}.spec-layout{padding:20px clamp(20px,4.6vw,72px) 65px;display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}.spec-number{background:#e6ebd8;padding:80px 30px;text-align:center;font-size:11rem;font-weight:400;letter-spacing:-.08em;line-height:1}.spec-number small{font-size:4rem}.spec-layout h2{font-size:2rem}.check-list{list-style:none;padding:0;margin:25px 0}.check-list li{border-bottom:1px solid var(--line);padding:14px 0;line-height:1.6}.check-list li::before{content:'';display:inline-block;width:7px;height:7px;border:1px solid var(--green);margin-right:15px;border-radius:50%}.grade-links{display:flex;gap:28px;margin:0 clamp(20px,4.6vw,72px) 65px}.contact-layout{display:grid;grid-template-columns:1fr 1.05fr;gap:6vw;padding:65px clamp(20px,4.6vw,72px) 80px}.contact-intro .page-heading{padding:0}.contact-intro h1{font-size:clamp(2.6rem,4.15vw,4.6rem)}.contact-intro .lead{max-width:445px}.email-block{padding-top:28px;margin-top:35px;border-top:1px solid var(--line);max-width:445px}.email-block .eyebrow{margin-bottom:12px}.email-block a{font-size:1.65rem;display:flex;justify-content:space-between;align-items:center}.contact-intro>.fine-print{max-width:445px;margin-top:36px}.preview-note{font-size:.79rem;padding:16px 20px;background:#e5edd5;border-left:3px solid var(--green)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.field label{display:block;font-size:.81rem;line-height:1.45;margin-bottom:9px}.field 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var(--line);margin-bottom:20px;font-size:.88rem;line-height:1.6}#form-status.error{border-color:#a43e27;color:#933923}#form-status.success{background:#e5edd5}form>.button{margin-top:24px;min-width:190px}footer{padding:58px clamp(20px,4.6vw,72px) 24px;background:#f7f7ef;border-top:1px solid var(--line)}.footer-main{display:grid;grid-template-columns:1.5fr .7fr 1fr;gap:50px}.footer-wordmark{font-size:2.4rem;letter-spacing:-.065em;color:#497c1b}.footer-wordmark span{font-size:.7rem;vertical-align:top;position:relative;top:6px;margin-left:3px}.footer-tag{font-size:.93rem;margin:14px 0}.footer-main p:not(.footer-tag){font-size:.8rem;color:var(--muted)}.footer-links,.footer-contact{display:flex;flex-direction:column;align-items:flex-start;gap:15px;font-size:.85rem;padding-top:9px}.footer-links a:hover,.footer-contact>a:hover{text-decoration:underline}.footer-contact .text-link{margin-bottom:3px}.footer-bottom{border-top:1px solid var(--line);margin-top:38px;padding-top:22px;display:flex;justify-content:space-between;gap:28px;align-items:flex-start}.footer-bottom p{font-size:.69rem;max-width:830px;margin:0;color:var(--muted)}.footer-bottom>span{white-space:nowrap;font-size:.69rem;color:var(--muted)}html[lang=zh-CN] h1{line-height:1.25;font-size:clamp(2.4rem,4vw,4.3rem)}html[lang=zh-CN] h2{line-height:1.35}html[lang=zh-CN] .site-header nav{gap:17px;font-size:.83rem}html[lang=zh-CN] .hero-foot>span:last-child{font-size:.62rem}html[lang=zh-CN] .eyebrow{letter-spacing:.1em}html[lang=zh-CN] .contact-intro h1{font-size:clamp(2.5rem,4vw,4.2rem)}
@media(min-width:1600px){.home-hero{gap:80px}.hero-copy{padding-top:100px}.hero-art{min-height:655px}}
@media(max-width:1100px){.site-header{height:84px}.brand-crop{width:160px;height:56px}.brand img{width:200px;left:-20px;top:-56px}.menu-toggle{display:flex;border:1px solid var(--line);background:#fff;align-items:center;gap:12px;padding:12px;font-size:.82rem;min-height:44px}.menu-lines{width:18px;height:12px;display:block;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);position:relative}.menu-lines:after{content:'';position:absolute;top:4px;width:100%;left:0;border-top:1px solid var(--ink)}.site-header nav{display:none;position:absolute;left:0;right:0;top:83px;padding:20px clamp(20px,4.6vw,72px) 30px;background:#fff;box-shadow:0 14px 16px #203c2210;flex-direction:column;align-items:stretch;gap:0!important;white-space:normal;border-bottom:1px solid var(--line)}.site-header nav.open{display:flex}.site-header nav>a:not(.nav-cta){padding:14px 0;border-bottom:1px solid var(--line)}.site-header nav .nav-cta{margin-top:20px;align-self:flex-start}.hero-art{min-height:530px}.hero-copy{padding-top:60px}.hero-foot{flex-direction:column;align-items:flex-start;margin-top:45px;gap:12px}.grade-copy{padding:35px}.grade-visual strong{font-size:7rem}.contact-layout{gap:4vw}.form-grid{gap:16px}.seed-one{left:12%;width:163px;height:206px}.seed-two{left:51%;width:100px;height:129px}.seed-three{width:78px;height:100px}.orbit-one{width:400px;height:295px}.orbit-two{width:285px;height:390px}.footer-main{gap:26px}.hero-copy h1{font-size:3.4rem}}
@media(max-width:767px){.site-header{height:78px;padding:0 20px}.site-header nav{top:77px;max-height:calc(100dvh - 78px);overflow-y:auto}.brand-crop{width:154px;height:54px}.brand img{width:193px;left:-20px;top:-54px}.home-hero{grid-template-columns:1fr;padding:0;gap:0}.hero-copy{padding:42px 20px 28px}.hero-copy h1{font-size:clamp(2.4rem,8.6vw,3.9rem);letter-spacing:-.04em}.hero-copy .lead{margin:22px 0 27px;font-size:.97rem}.eyebrow{font-size:.62rem;margin-bottom:20px}.actions{gap:16px 24px}.actions .text-link{font-size:.86rem}.button{padding:16px 20px;gap:22px;font-size:.88rem}.hero-foot{flex-direction:row;align-items:center;margin-top:32px;gap:15px}.hero-foot>span:first-child{font-size:.96rem}.hero-foot i{margin:0 5px}.hero-foot>span:last-child{font-size:.48rem;max-width:150px;line-height:1.7;text-align:right}.hero-art{min-height:355px;margin:0 20px 28px}.art-caption{top:23px;left:22px;font-size:.5rem}.seed-one{width:118px;height:148px;top:25%;left:24%}.seed-two{width:76px;height:96px;left:56%;top:54%}.seed-three{width:64px;height:79px;left:62%;top:15%}.orbit-one{width:280px;height:220px;left:3%;top:24%}.orbit-two{width:215px;height:300px;top:8%;left:20%}.particle-cloud{width:230px;height:125px;left:18%;bottom:12%}.art-bottom{bottom:21px;left:22px;right:22px;font-size:.48rem}.section{padding:48px 20px}.section-heading{flex-direction:column;align-items:flex-start;gap:20px;margin-bottom:30px}.section-heading h2{font-size:2rem}.section-heading p{font-size:.91rem}.grade-tabs button{font-size:2rem;padding:16px 17px}.grade-tabs button span{font-size:.95rem}.grade-panel{grid-template-columns:1fr}.grade-visual{min-height:230px;padding:22px}.grade-visual strong{font-size:6.7rem}.powder-orbit{width:215px;height:135px;left:24%;top:21%}.grade-copy{padding:30px 8px 8px}.grade-copy h3{font-size:1.8rem}.grade-copy p{font-size:.93rem}.grade-copy .fine-print{font-size:.77rem}.steps{grid-template-columns:1fr;gap:27px}.steps article{position:relative;padding:22px 0 0 43px}.steps article>span{position:absolute;top:24px;left:0}.steps h3{margin:0 0 12px;font-size:1.38rem}.steps p{max-width:none}.insight-list{grid-template-columns:1fr;gap:30px}.insight-list h3{font-size:1.7rem}.insight-list .eyebrow{margin-bottom:19px}.insight-list p{font-size:.93rem}.cta-band{padding:40px 20px;flex-direction:column;align-items:flex-start;gap:26px}.cta-band h2{font-size:2rem}.page-heading{padding:42px 20px 28px}.page-heading h1{font-size:2.55rem;line-height:1.14}.page-heading .lead{font-size:.97rem;margin-top:22px}.compact{padding-top:12px}.detail-list article{grid-template-columns:30px 1fr;padding:27px 0;gap:10px}.detail-list h3{font-size:1.38rem}.detail-list p{font-size:.94rem}.document-note{padding:12px 17px;margin-top:27px;font-size:.81rem}.version-note{margin:0 20px 42px;padding:28px 23px;gap:16px}.version-note h2{font-size:1.65rem}.version-note p{font-size:.92rem}.reading-body{padding:12px 20px 36px}.reading-body h2{font-size:1.5rem}.reading-body p{font-size:.96rem}.reading-body section{margin-bottom:30px}.spec-layout{padding:12px 20px 40px;grid-template-columns:1fr;gap:34px}.spec-number{font-size:8rem;padding:42px 20px}.spec-number small{font-size:3rem}.spec-layout h2{font-size:1.7rem}.check-list{font-size:.91rem}.grade-links{margin:0 20px 40px;gap:20px;flex-wrap:wrap}.contact-layout{padding:42px 20px 48px;grid-template-columns:1fr;gap:34px}.contact-intro h1{font-size:2.65rem}.contact-intro .lead{margin-bottom:24px}.email-block{margin-top:25px;padding-top:23px}.email-block a{font-size:1.48rem}.contact-intro>.fine-print{margin-top:24px}.form-grid{gap:18px}.field label{font-size:.8rem}.field select{font-size:.88rem}.consent label{font-size:.77rem}.preview-note{font-size:.77rem;padding:14px 16px}.footer-main{grid-template-columns:1fr 1fr;gap:30px 20px}.footer-main>div:first-child{grid-column:1/-1}.footer-contact .text-link{font-size:.82rem}.footer-links,.footer-contact{font-size:.77rem;gap:15px}.footer-main p:not(.footer-tag){margin:0}.footer-bottom{flex-direction:column;gap:14px;margin-top:29px;padding-top:22px}.footer-bottom p{font-size:.64rem}footer{padding:38px 20px 23px}.footer-wordmark{font-size:2.1rem}html[lang=zh-CN] h1{font-size:2.55rem}html[lang=zh-CN] .hero-copy h1{font-size:clamp(2.35rem,8.5vw,3.2rem)}html[lang=zh-CN] .contact-intro h1{font-size:2.6rem}html[lang=zh-CN] .hero-foot>span:last-child{font-size:.55rem}}
@media(max-width:380px){.form-grid{grid-template-columns:1fr}.full{grid-column:auto}.hero-copy h1{font-size:2.4rem}.hero-foot{align-items:flex-start}.hero-art{min-height:320px}.seed-one{left:20%;top:27%}.seed-two{left:54%;top:55%}.orbit-one{width:260px}.actions{gap:12px 18px}.actions .button{font-size:.83rem;padding:15px 16px}.actions .text-link{font-size:.82rem;gap:12px}.footer-main{grid-template-columns:1fr}.footer-main>div:first-child{grid-column:auto}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

svg{width:17px;height:17px;vertical-align:middle;flex-shrink:0}
/* Procurement architecture: semantic tables, document requests and topic pages. */
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/* Restore the original SoyOne green, pale aqua and blue visual direction. */
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.heritage-image img{object-fit:cover;object-position:center 54%}

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/* Unified green palette: USWDS mint / green-cool / gray-warm families. */
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/* Preserve the homepage's pale aqua hero; carry its green into the rest of the site. */
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/* Six subtle section identities, sharing the same accessible forest-green controls. */
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