:root{
    --teal:#2F8F83;
    --teal-dark:#246e66;
    --apricot:#F2B36F;
    --ink:#243331;
    --bg:#FAFCFA;
    --soft:#EEF5F2;
    --text:#2E3836;
    --muted:#71807C;
    --accent:#E96B4C;
    --white:#fff;
    --line:#dfe9e5;
    --shadow:0 18px 50px rgba(36,51,49,.10);
    --shadow-soft:0 10px 30px rgba(36,51,49,.07);
    --radius-sm:14px;
    --radius:24px;
    --radius-lg:36px;
    --shell:min(1180px,calc(100% - 40px));
    --reading:760px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.72;text-rendering:optimizeLegibility}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
.shell{width:var(--shell);margin-inline:auto}
.narrow-shell{max-width:860px}
.skip-link{position:fixed;left:16px;top:12px;z-index:1000;padding:10px 16px;border-radius:10px;background:var(--ink);color:#fff;transform:translateY(-160%);transition:transform .2s ease}
.skip-link:focus{transform:translateY(0)}
.site-header{position:sticky;top:0;z-index:50;background:rgba(250,252,250,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(223,233,229,.9)}
.header-shell{min-height:82px;display:flex;align-items:center;gap:28px}
.brand-lockup{display:flex;align-items:center;gap:12px;min-width:max-content}
.brand-mark{width:48px;height:48px;border-radius:16px;object-fit:cover;background:var(--soft)}
.brand-lockup strong{display:block;font-size:19px;line-height:1.25;color:var(--ink)}
.brand-lockup small{display:block;color:var(--muted);font-size:12px;margin-top:4px}
.primary-nav{margin-left:auto;display:flex;align-items:center;gap:8px}
.primary-nav a{padding:10px 13px;border-radius:12px;color:#40504d;font-size:15px}
.primary-nav a:hover,.primary-nav a:focus-visible,.primary-nav a[aria-current="page"]{background:var(--soft);color:var(--teal-dark);outline:none}
.primary-nav .nav-search{border:1px solid var(--line);background:#fff}
.menu-button{display:none;margin-left:auto;align-items:center;gap:8px;padding:10px 12px;border:1px solid var(--line);background:#fff;border-radius:12px;color:var(--ink)}
.menu-lines,.menu-lines::before,.menu-lines::after{content:"";display:block;width:18px;height:2px;background:currentColor;position:relative}
.menu-lines::before{position:absolute;top:-6px}
.menu-lines::after{position:absolute;top:6px}
.hero{padding:70px 0 52px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:68px;align-items:center}
.eyebrow{margin:0 0 12px;text-transform:none;letter-spacing:.08em;font-weight:800;font-size:13px;color:var(--teal-dark)}
.hero h1,.subhero h1,.search-hero h1,.not-found h1{font-size:clamp(38px,5.4vw,68px);line-height:1.08;letter-spacing:-.035em;color:var(--ink);margin:0}
.hero-lead,.subhero p,.search-summary,.not-found>div>p{font-size:18px;color:#52615e;margin:24px 0 0;max-width:720px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;border-radius:14px;border:1px solid transparent;font-weight:800;transition:transform .2s ease,box-shadow .2s ease,background .2s ease}
.button:hover{transform:translateY(-2px)}
.button:focus-visible{outline:3px solid rgba(47,143,131,.28);outline-offset:3px}
.button-primary{background:var(--accent);color:#fff;box-shadow:0 12px 28px rgba(233,107,76,.22)}
.button-primary:hover{background:#d95f42}
.button-quiet{background:#fff;border-color:var(--line);color:var(--ink)}
.hero-note{display:flex;flex-wrap:wrap;gap:8px;margin-top:32px}
.hero-note span,.tag{display:inline-flex;align-items:center;min-height:30px;padding:5px 10px;border-radius:999px;background:var(--soft);color:#49645f;font-size:13px}
.hero-media{position:relative}
.hero-media>img{width:100%;aspect-ratio:1.12/1;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow)}
.hero-media::before{content:"";position:absolute;width:220px;height:220px;border-radius:50%;background:rgba(242,179,111,.22);right:-70px;top:-60px;z-index:-1}
.hero-card{position:absolute;background:rgba(255,255,255,.94);box-shadow:var(--shadow-soft);border:1px solid rgba(223,233,229,.8);border-radius:16px;padding:13px 15px;display:grid;gap:2px}
.hero-card strong{color:var(--ink);font-size:14px}
.hero-card span{font-size:12px;color:var(--muted)}
.hero-card-a{left:-26px;bottom:64px}
.hero-card-b{right:-20px;top:56px}
.section{padding:86px 0}
.section-content{padding-top:56px}
.alt-section{background:var(--soft)}
.section-heading{max-width:760px;margin-bottom:34px}
.section-heading.wide-heading{max-width:none;display:grid;grid-template-columns:1fr minmax(280px,.7fr);gap:48px;align-items:end}
.section-heading h2,.bridge-copy h2,.device-card h2,.sticky-intro h2,.compact-cta h2,.desktop-flow h2,.prose-columns h2,.app-compare h2{font-size:clamp(29px,3.8vw,46px);line-height:1.15;letter-spacing:-.025em;color:var(--ink);margin:0}
.section-heading>p,.wide-heading>p,.bridge-copy>p,.device-card>p,.sticky-intro>p,.desktop-flow-copy>p,.prose-columns p,.app-compare>div>p{color:var(--muted);margin:15px 0 0}
.collection-block{padding:34px 0 18px;border-top:1px solid var(--line)}
.collection-heading{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:end;margin-bottom:24px}
.collection-heading h3{margin:0;color:var(--ink);font-size:28px}
.collection-heading>p{margin:0;color:var(--muted)}
.content-grid{display:grid;gap:18px}
.content-grid-dense{grid-template-columns:repeat(3,1fr)}
.content-grid-airy{grid-template-columns:repeat(3,1fr)}
.content-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:0 1px 0 rgba(36,51,49,.02);transition:transform .24s ease,box-shadow .24s ease}
.content-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-soft)}
.content-card img{width:100%;aspect-ratio:1.52/1;object-fit:cover;background:var(--soft)}
.content-card-body{padding:20px}
.card-kicker{color:var(--accent);font-weight:800;font-size:13px;margin:0 0 8px}
.content-card h4{font-size:22px;color:var(--ink);margin:0 0 10px}
.content-card p{color:var(--muted);margin:0}
.tag-row{display:flex;flex-wrap:wrap;gap:7px;margin-top:18px}
.web-bridge{background:linear-gradient(180deg,var(--bg),#f7fbf9)}
.bridge-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:64px;align-items:center}
.bridge-media img{border-radius:var(--radius-lg);box-shadow:var(--shadow-soft);aspect-ratio:1.25/1;object-fit:cover}
.compact-facts{display:grid;gap:0;margin:28px 0}
.compact-facts>div{display:grid;grid-template-columns:140px 1fr;gap:20px;padding:14px 0;border-bottom:1px solid var(--line)}
.compact-facts dt{font-weight:800;color:var(--ink)}
.compact-facts dd{margin:0;color:var(--muted)}
.text-link{display:inline-flex;align-items:center;gap:8px;color:var(--teal-dark);font-weight:800}
.text-link span{transition:transform .2s ease}
.text-link:hover span{transform:translateX(4px)}
.section-notes{background:var(--ink);color:#eaf2ef}
.section-notes .eyebrow{color:#8fd3c9}
.section-notes .section-heading h2{color:#fff}
.section-notes .section-heading p{color:#aebdb9}
.notes-layout{display:grid;grid-template-columns:minmax(260px,.75fr) minmax(0,1.25fr);gap:44px;align-items:start}
.notes-index{display:grid;max-height:560px;overflow:auto;padding-right:8px}
.notes-index button{text-align:left;border:0;border-bottom:1px solid rgba(255,255,255,.12);background:transparent;color:#b9c8c4;padding:14px 8px;display:grid;grid-template-columns:38px 1fr;gap:8px;align-items:start}
.notes-index button span{font-size:11px;color:#82928e;padding-top:4px}
.notes-index button:hover,.notes-index button[aria-current="true"]{color:#fff;background:rgba(255,255,255,.04)}
.notes-index button:focus-visible{outline:2px solid #8fd3c9;outline-offset:-2px}
.notes-panels{position:sticky;top:120px}
.note-panel{min-height:330px;border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.04);border-radius:var(--radius-lg);padding:38px}
.note-panel[hidden]{display:none}
.note-number{color:#8fd3c9;margin:0 0 16px;font-size:13px;font-weight:800}
.note-panel h3{margin:0 0 18px;color:#fff;font-size:34px;line-height:1.2}
.note-panel p{margin:0;color:#c1cecb;font-size:17px}
.noscript-notes article{border-top:1px solid rgba(255,255,255,.12);padding:20px 0}
.device-strip{padding-top:74px}
.device-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}
.device-card{border:1px solid var(--line);border-radius:var(--radius-lg);padding:34px;background:#fff}
.device-card-main{background:var(--soft);min-height:390px;display:flex;flex-direction:column;justify-content:flex-end}
.device-card img{border-radius:18px;margin-bottom:26px;aspect-ratio:1.35/1;object-fit:cover}
.device-card a{display:inline-flex;margin-top:18px;font-weight:800;color:var(--teal-dark)}
.subhero{padding:64px 0 52px}
.subhero-grid{display:grid;grid-template-columns:1fr .82fr;gap:64px;align-items:center}
.subhero img{width:100%;border-radius:var(--radius-lg);aspect-ratio:1.2/1;object-fit:cover;box-shadow:var(--shadow-soft)}
.subhero h1{font-size:clamp(36px,5vw,58px)}
.breadcrumbs{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:13px;color:var(--muted);margin-bottom:28px}
.breadcrumbs a:hover{color:var(--teal-dark)}
.web-checklist{display:grid;grid-template-columns:.72fr 1.28fr;gap:68px;align-items:start}
.sticky-intro{position:sticky;top:120px}
.checklist-cards{display:grid;gap:14px}
.checklist-cards article{padding:28px;border:1px solid var(--line);background:#fff;border-radius:20px}
.checklist-cards article>span{display:inline-flex;color:var(--accent);font-weight:900;font-size:12px;margin-bottom:9px}
.checklist-cards h3{font-size:23px;color:var(--ink);margin:0 0 9px}
.checklist-cards p{color:var(--muted);margin:0}
.compare-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.compare-grid article{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.compare-grid img{border-radius:16px;aspect-ratio:1.45/1;object-fit:cover}
.compare-grid h3{margin:20px 4px 10px;font-size:25px;color:var(--ink)}
.compare-grid ul{padding-left:24px;color:var(--muted);margin:0 4px 8px}
.compare-grid li+li{margin-top:8px}
.faq-list{display:grid;gap:10px}
.faq-list details{border:1px solid var(--line);background:#fff;border-radius:18px;padding:0 20px}
.faq-list summary{padding:18px 0;cursor:pointer;font-weight:800;color:var(--ink);list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";color:var(--teal);font-size:22px;line-height:1}
.faq-list details[open] summary::after{content:"−"}
.faq-list details p{padding:0 0 20px;margin:0;color:var(--muted);max-width:850px}
.compact-cta{padding-top:34px}
.compact-cta-inner{background:var(--ink);color:#fff;border-radius:var(--radius-lg);padding:34px 38px;display:flex;align-items:center;justify-content:space-between;gap:30px}
.compact-cta h2{color:#fff;font-size:30px}
.compact-cta .eyebrow{color:#8fd3c9}
.desktop-feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.desktop-feature-grid article{padding:26px;border-radius:20px;border:1px solid var(--line);background:#fff}
.desktop-feature-grid span{color:var(--accent);font-size:12px;font-weight:900}
.desktop-feature-grid h2{font-size:23px;color:var(--ink);margin:10px 0 8px}
.desktop-feature-grid p{margin:0;color:var(--muted)}
.desktop-flow{display:grid;grid-template-columns:1.08fr .92fr;gap:58px;align-items:center}
.desktop-flow>img{border-radius:var(--radius-lg);aspect-ratio:1.15/1;object-fit:cover;box-shadow:var(--shadow-soft)}
.step-list{display:grid;gap:18px;margin:28px 0 0;padding:0;list-style:none}
.step-list li{display:grid;grid-template-columns:42px 1fr;gap:14px}
.step-list li>span{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:#fff;color:var(--teal-dark);font-weight:900;border:1px solid var(--line)}
.step-list strong{color:var(--ink)}
.step-list p{margin:4px 0 0;color:var(--muted)}
.prose-columns{display:grid;grid-template-columns:1fr 1fr;gap:58px}
.prose-columns article{max-width:620px}
.prose-columns h2{font-size:32px}
.app-point-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.app-point-grid article{border:1px solid var(--line);border-radius:24px;background:#fff;padding:26px}
.round-index{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:var(--soft);color:var(--teal-dark);font-weight:900}
.app-point-grid h2{font-size:22px;line-height:1.25;color:var(--ink);margin:22px 0 10px}
.app-point-grid p{margin:0;color:var(--muted)}
.app-compare{display:grid;grid-template-columns:1.05fr .95fr;gap:64px;align-items:center}
.app-compare>img{border-radius:var(--radius-lg);max-height:650px;width:100%;object-fit:cover}
.choice-list{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:28px}
.choice-list div{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;display:grid;gap:4px}
.choice-list strong{color:var(--ink)}
.choice-list span{color:var(--muted);font-size:14px}
.search-hero{padding:70px 0 40px}
.search-form{margin-top:32px}
.search-form label{display:block;font-weight:800;margin-bottom:8px;color:var(--ink)}
.search-row{display:grid;grid-template-columns:1fr auto;gap:10px}
.search-row input{width:100%;min-width:0;border:1px solid var(--line);border-radius:14px;background:#fff;padding:0 16px;min-height:50px;color:var(--ink)}
.search-row input:focus{outline:3px solid rgba(47,143,131,.18);border-color:var(--teal)}
.search-results{display:grid;gap:14px}
.search-results article{border:1px solid var(--line);background:#fff;border-radius:18px;padding:24px}
.search-results h2{font-size:23px;margin:0 0 8px;color:var(--ink)}
.search-results h2 a:hover{color:var(--teal-dark)}
.search-results p{margin:0;color:var(--muted)}
.empty-state{padding:50px;border-radius:var(--radius);background:var(--soft);text-align:center}
.empty-state h2{font-size:30px;color:var(--ink);margin:0}
.empty-state p{color:var(--muted)}
.not-found{padding:100px 0 120px}
.error-code{color:var(--accent)!important;font-size:14px!important;font-weight:900;letter-spacing:.18em;margin:0 0 14px!important}
.site-footer{padding:64px 0 24px;background:#1f2c2a;color:#c8d3d0}
.footer-grid{display:grid;grid-template-columns:1.35fr .8fr .8fr 1fr;gap:34px}
.footer-grid section{display:flex;flex-direction:column;align-items:flex-start;gap:9px}
.footer-brand{font-size:24px;font-weight:900;color:#fff}
.footer-grid h2{font-size:14px;color:#fff;margin:0 0 4px}
.footer-grid p{margin:0;color:#96aaa5;max-width:340px}
.footer-grid a:not(.footer-brand){font-size:14px;color:#b6c6c2}
.footer-grid a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:38px;padding-top:20px;display:flex;justify-content:space-between;gap:20px;color:#829690;font-size:13px}
.back-top{position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--ink);box-shadow:var(--shadow-soft);opacity:0;pointer-events:none;transform:translateY(10px);transition:opacity .2s ease,transform .2s ease;z-index:40}
.back-top.is-visible{opacity:1;pointer-events:auto;transform:translateY(0)}
@media (max-width:980px){
    :root{--shell:min(100% - 32px,900px)}
    .header-shell{min-height:74px}
    .menu-button{display:flex}
    .primary-nav{position:absolute;left:16px;right:16px;top:68px;display:none;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);border-radius:18px;padding:10px;box-shadow:var(--shadow)}
    .primary-nav.is-open{display:flex}
    .primary-nav a{padding:12px 14px}
    .hero-grid,.subhero-grid,.bridge-grid,.desktop-flow,.app-compare{grid-template-columns:1fr}
    .hero{padding-top:48px}
    .hero-media{max-width:760px}
    .hero-card-a{left:14px}
    .hero-card-b{right:14px}
    .content-grid-dense,.content-grid-airy{grid-template-columns:repeat(2,1fr)}
    .section-heading.wide-heading,.collection-heading{grid-template-columns:1fr;gap:14px}
    .notes-layout{grid-template-columns:1fr}
    .notes-index{grid-template-columns:repeat(2,1fr);max-height:none}
    .notes-panels{position:static}
    .device-grid,.compare-grid,.prose-columns{grid-template-columns:1fr}
    .web-checklist{grid-template-columns:1fr;gap:28px}
    .sticky-intro{position:static}
    .desktop-feature-grid{grid-template-columns:repeat(2,1fr)}
    .app-point-grid{grid-template-columns:repeat(2,1fr)}
    .footer-grid{grid-template-columns:1.2fr 1fr 1fr}
    .footer-grid section:last-child{grid-column:1/-1}
}
@media (max-width:640px){
    :root{--shell:calc(100% - 24px)}
    .site-header{backdrop-filter:none}
    .brand-lockup small{display:none}
    .brand-mark{width:42px;height:42px;border-radius:13px}
    .hero,.subhero,.search-hero{padding-top:36px}
    .hero h1,.subhero h1,.search-hero h1,.not-found h1{font-size:38px}
    .hero-lead,.subhero p{font-size:16px}
    .hero-actions{align-items:stretch}
    .hero-actions .button{width:100%}
    .hero-card{position:static;margin-top:10px}
    .hero-media{display:grid;grid-template-columns:1fr 1fr;gap:8px}
    .hero-media>img{grid-column:1/-1}
    .section{padding:62px 0}
    .section-heading h2,.bridge-copy h2,.device-card h2,.sticky-intro h2,.desktop-flow h2,.prose-columns h2,.app-compare h2{font-size:30px}
    .content-grid-dense,.content-grid-airy{grid-template-columns:1fr}
    .content-card-body{padding:18px}
    .compact-facts>div{grid-template-columns:1fr;gap:4px}
    .notes-index{grid-template-columns:1fr}
    .note-panel{min-height:auto;padding:25px}
    .note-panel h3{font-size:28px}
    .device-grid,.desktop-feature-grid,.app-point-grid,.choice-list{grid-template-columns:1fr}
    .device-card{padding:24px}
    .compare-grid article{padding:14px}
    .compact-cta-inner{padding:28px 22px;align-items:stretch;flex-direction:column}
    .compact-cta .button{width:100%}
    .search-row{grid-template-columns:1fr}
    .search-row .button{width:100%}
    .footer-grid{grid-template-columns:1fr 1fr}
    .footer-grid section:first-child,.footer-grid section:last-child{grid-column:1/-1}
    .footer-bottom{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
    *,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}
}
@media print{
    .site-header,.site-footer,.back-top,.hero-actions{display:none!important}
    body{background:#fff;color:#000}
    .section,.hero,.subhero{padding:24px 0}
    .content-card,.note-panel,.device-card,.checklist-cards article{box-shadow:none;border:1px solid #bbb;break-inside:avoid}
}

/* Additional responsive and state styles for robust content presentation */
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid rgba(47,143,131,.28);outline-offset:3px}
::selection{background:rgba(242,179,111,.5);color:var(--ink)}
.content-card:target{outline:3px solid rgba(233,107,76,.35);outline-offset:4px}
.primary-nav a[aria-current="page"]::after{content:"";display:block;height:2px;border-radius:2px;background:var(--teal);margin-top:3px}
.section-content .collection-block:last-child{padding-bottom:0}
.subhero-web{background:linear-gradient(180deg,#f4faf7 0%,var(--bg) 100%)}
.subhero-desktop{background:linear-gradient(180deg,#fff9f3 0%,var(--bg) 100%)}
.subhero-app{background:linear-gradient(180deg,#f6faf8 0%,var(--bg) 100%)}
.search-hero{background:linear-gradient(180deg,var(--soft),var(--bg))}
.search-summary{font-size:15px}
.notes-index::-webkit-scrollbar{width:8px}
.notes-index::-webkit-scrollbar-thumb{background:rgba(255,255,255,.18);border-radius:8px}
.notes-index::-webkit-scrollbar-track{background:transparent}


.viewer-guides{background:#fff}
.guide-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.guide-card{position:relative;padding:28px 30px 30px;border:1px solid var(--line);border-radius:24px;background:linear-gradient(180deg,#fff 0%,#fbfdfc 100%);overflow:hidden}
.guide-card::after{content:"";position:absolute;width:120px;height:120px;border-radius:50%;right:-58px;bottom:-68px;background:rgba(47,143,131,.06);pointer-events:none}
.guide-index{display:inline-flex;align-items:center;justify-content:center;min-width:38px;height:28px;padding:0 10px;border-radius:999px;background:var(--soft);color:var(--teal-dark);font-size:12px;font-weight:900;letter-spacing:.08em}
.guide-card h3{margin:16px 0 10px;font-size:23px;line-height:1.3;color:var(--ink)}
.guide-card p{margin:0;color:var(--muted)}
.guide-card .guide-lead{color:#455652;font-weight:650;margin-bottom:10px}
@media (max-width:760px){
    .guide-grid{grid-template-columns:1fr}
    .guide-card{padding:24px 22px}
}


.scenario-section{background:linear-gradient(180deg,var(--bg) 0%,#f7faf8 100%)}
.scenario-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.scenario-card{padding:25px 26px;border:1px solid var(--line);border-radius:22px;background:#fff;box-shadow:0 1px 0 rgba(36,51,49,.02)}
.scenario-card h3{margin:0 0 10px;color:var(--ink);font-size:21px;line-height:1.3}
.scenario-card p{margin:0;color:var(--muted)}
.scenario-card .scenario-advice{margin-top:12px;padding-top:12px;border-top:1px solid var(--line);color:#4b5f5b}
@media (max-width:720px){.scenario-grid{grid-template-columns:1fr}.scenario-card{padding:22px}}