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@media(max-width:900px){.nav-toggle{display:block}.site-nav{display:none;position:absolute;top:76px;left:0;right:0;background:#f7faf7;border-bottom:1px solid var(--line);padding:22px 16px;flex-direction:column;align-items:stretch}.site-nav.open{display:flex}.site-nav .button{text-align:center}.hero-grid,.grid-4{grid-template-columns:1fr 1fr}.hero-grid{gap:44px}.flow{grid-template-columns:1fr 1fr}.flow .step:not(:last-child):after{display:none}.trust-items{grid-template-columns:1fr 1fr}}
@media(max-width:650px){body{font-size:16px}.hero{padding:56px 0 48px}.hero-grid,.grid-2,.grid-3,.grid-4,.flow,.footer-grid{grid-template-columns:1fr}.hero-grid{gap:48px}.mockup{transform:none}.section{padding:64px 0}.section-tight{padding:46px 0}.trust-items{grid-template-columns:1fr}.trust-items span{text-align:left}.loop{grid-template-columns:1fr}.loop-center{margin:auto}.cta{align-items:flex-start;flex-direction:column;padding:30px}.glossary thead{position:absolute;clip:rect(0 0 0 0)}.glossary,.glossary tbody,.glossary tr,.glossary td{display:block}.glossary tr{padding:13px 0;border-bottom:1px solid var(--line)}.glossary td{border:0;padding:5px 15px}.glossary td:before{content:attr(data-label);display:block;font-size:.68rem;font-weight:800;letter-spacing:.08em;color:var(--muted);text-transform:uppercase}.page-hero{padding-top:45px}}
@media(prefers-color-scheme:dark){:root{--ink:#eaf3ef;--muted:#aec1bc;--paper:#0b2524;--white:#102e2d;--line:#294441;--mint:#193d39}.site-header{background:rgba(11,37,36,.94)}.site-nav>a:not(.button),.page-hero h1,.hero h1,.section h2,.section-tight h2,.card h3{color:#ecf5f1}.hero,.page-hero{background:linear-gradient(180deg,#102e2d,#0b2524)}.section-white,.card,.mockup,.form-card,.glossary{background:#102e2d}.section-mint,.cta{background:#143532}.mock-row{background:#173735}.glossary th{background:#173b38}.field input,.field select,.field textarea{background:#0b2524;color:#eaf3ef}.callout,.form-status,.mock-cite{background:#32291e;color:#f3ddbd}.brand img{filter:brightness(0) invert(1)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}

/* Black, red, and lichen theme */
:root{--ink:#0b0d0a;--muted:#51594a;--paper:#f0f1e7;--white:#fbfaf4;--teal:#0b0d0a;--teal-2:#9e2530;--mint:#d9ddc2;--gold:#bd2c37;--line:#c9cdb5;--shadow:0 18px 50px rgba(11,13,10,.12)}
body{background:var(--paper);color:var(--ink)}
a{color:#8f1f29}a:hover{color:#0b0d0a}
.site-header{background:rgba(240,241,231,.95);border-color:rgba(112,119,96,.28)}
.site-nav>a:not(.button){color:#24271f}.site-nav>a[aria-current=page]{color:#8f1f29;text-decoration-color:#bd2c37}
.nav-toggle span:not(.sr-only){background:#0b0d0a}
.button{border-color:#9e2530;background:#9e2530;box-shadow:0 8px 22px rgba(158,37,48,.22)}.button:hover{background:#781a22}.button-secondary{background:transparent;color:#0b0d0a!important;border-color:#0b0d0a}.button-secondary:hover{background:#d9ddc2}
.eyebrow{color:#9e2530}
.hero{background:radial-gradient(circle at 84% 20%,#d9ddc2 0,rgba(217,221,194,0) 36%),linear-gradient(180deg,#fbfaf4 0,#f0f1e7 100%)}
.hero h1,.page-hero h1,.section h2,.section-tight h2,.card h3{color:#0b0d0a}
.mockup,.card,.section-white,.form-card,.glossary{background:#fbfaf4}
.mockup:before,.draft-label{background:#d9ddc2;color:#303528}
.mock-row{background:#eceee0}.mock-row b{background:#0b0d0a}.mock-cite,.callout,.form-status{border-color:#bd2c37;background:#f4e6e4;color:#65171f}
.trust-bar,.section-dark,.site-footer{background:#0b0d0a;color:#e4e7d3}
.trust-bar{border-top:3px solid #bd2c37}.section-dark{border-block:1px solid #bd2c37}.section-dark .section-intro{color:#cbd0b9}
.section-mint,.cta,.glossary th{background:#d9ddc2}
.card .num{background:#d9ddc2;color:#0b0d0a}.flow .step,.page-hero{background:#fbfaf4}.flow .step:not(:last-child):after,.step .zh,.check-list li:before,.resource-card .tag{color:#9e2530}
.loop-center{background:#0b0d0a;box-shadow:0 0 0 15px rgba(189,44,55,.14)}
.faq summary{color:#191c16}.article-body p,.article-body li{color:#353a30}
.field input,.field select,.field textarea{background:#fbfaf4;color:#0b0d0a;border-color:#8f9680}.field input:focus,.field select:focus,.field textarea:focus{outline-color:#d9ddc2;border-color:#9e2530}
.site-footer{border-top:4px solid #bd2c37}.site-footer a{color:#e3b7b9}.disclaimer{color:#bfc5ad}
@media(max-width:900px){.site-nav{background:#f0f1e7}}
.brand img{filter:none!important}

/* Four-edition language navigation */
.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto}.language-menu{position:relative;flex:0 0 auto}.language-menu summary{list-style:none;cursor:pointer;border:1px solid #8f9680;border-radius:999px;background:#fbfaf4;color:#24271f;padding:8px 31px 8px 13px;font-size:.78rem;font-weight:800;line-height:1.2;white-space:nowrap}.language-menu summary::-webkit-details-marker{display:none}.language-menu summary:after{content:"▾";position:absolute;right:12px;top:50%;transform:translateY(-53%);color:#9e2530}.language-menu[open] summary{border-color:#9e2530;box-shadow:0 0 0 3px rgba(217,221,194,.9)}.language-options{position:absolute;top:calc(100% + 9px);right:0;z-index:80;display:grid;min-width:230px;padding:8px;background:#fbfaf4;border:1px solid #c9cdb5;border-radius:14px;box-shadow:0 16px 40px rgba(11,13,10,.18)}.language-options a{padding:9px 11px;border-radius:8px;color:#24271f;text-decoration:none;font-size:.86rem;font-weight:650}.language-options a:hover,.language-options a[aria-current=true]{background:#d9ddc2;color:#0b0d0a}.language-options a[aria-current=true]:after{content:"✓";float:right;color:#9e2530;font-weight:900}.site-nav{gap:16px}.site-nav>a:not(.button){font-size:.85rem}
html[lang="zh-Hans"] .mockup:before{content:"示意 · 合成"}html[lang="zh-Hant-TW"] .mockup:before{content:"示意 · 合成"}html[lang="zh-Hant-HK"] .mockup:before{content:"示意 · 合成"}

@media(max-width:1120px){.nav-toggle{display:block}.site-nav{display:none;position:absolute;top:76px;left:0;right:0;background:#f0f1e7;border-bottom:1px solid var(--line);padding:22px 16px;flex-direction:column;align-items:stretch}.site-nav.open{display:flex}.site-nav .button{text-align:center}.header-actions{gap:7px}}
@media(max-width:520px){.nav-wrap{gap:8px}.brand img{width:145px}.language-menu summary{max-width:130px;overflow:hidden;text-overflow:ellipsis;padding-left:10px;font-size:.72rem}.language-options{position:fixed;top:70px;left:16px;right:16px;min-width:0}.header-actions{gap:2px}.nav-toggle{padding:8px}}