:root{
    --brand:#C84A5A;
    --brand-soft:#D06472;
    --copper:#D08A48;
    --amber:#E59A3A;
    --ink:#121214;
    --bg:#17171A;
    --panel:#222226;
    --panel-2:#29292E;
    --text:#F1EEEE;
    --muted:#A9A3A6;
    --line:#37373D;
    --line-soft:#2D2D32;
    --max:1180px;
    --reading:820px;
    --radius:22px;
    --radius-sm:14px;
    --shadow:0 22px 70px rgba(0,0,0,.22);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg)}
body{
    margin:0;
    min-width:320px;
    background:
        radial-gradient(circle at 82% 4%, rgba(200,74,90,.09), transparent 29rem),
        radial-gradient(circle at 7% 28%, rgba(208,138,72,.055), transparent 23rem),
        var(--bg);
    color:var(--text);
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
    font-size:16px;
    line-height:1.75;
    overflow-x:hidden;
}

body.modal-open{overflow:hidden}
a{color:inherit;text-decoration:none}
a:hover{color:#fff}
button,input{font:inherit}
button{color:inherit}
img{display:block;max-width:100%;height:auto}
figure{margin:0}
p{margin:0 0 1em;color:var(--muted)}
strong{color:var(--text)}
h1,h2,h3{margin:0;color:var(--text);font-weight:720;line-height:1.18;letter-spacing:-.025em}
h1{font-size:clamp(2.45rem,5.8vw,5.4rem)}
h2{font-size:clamp(1.7rem,3.1vw,3rem)}
h3{font-size:1.16rem}
ul,ol{margin:0;padding:0}

.skip-link{
    position:fixed;
    left:18px;
    top:12px;
    z-index:999;
    padding:10px 14px;
    border-radius:10px;
    background:var(--amber);
    color:var(--ink);
    transform:translateY(-150%);
    transition:transform .2s ease;
}
.skip-link:focus{transform:translateY(0)}

.site-header{
    position:sticky;
    top:0;
    z-index:80;
    border-bottom:1px solid rgba(255,255,255,.06);
    background:rgba(23,23,26,.91);
    backdrop-filter:blur(18px);
}
.header-shell{
    width:min(var(--max),calc(100% - 48px));
    min-height:76px;
    margin:0 auto;
    display:flex;
    align-items:center;
    gap:26px;
}
.brand-mark{
    display:flex;
    align-items:center;
    gap:11px;
    flex:none;
    font-weight:800;
    letter-spacing:-.02em;
}
.brand-logo{
    width:38px;
    height:38px;
    object-fit:cover;
    border-radius:10px;
    background:var(--panel);
}
.primary-nav{
    margin-left:auto;
    display:flex;
    align-items:center;
    gap:4px;
}
.primary-nav a{
    display:inline-flex;
    align-items:center;
    min-height:42px;
    padding:0 13px;
    border-radius:11px;
    color:var(--muted);
    font-size:.94rem;
    transition:background .18s ease,color .18s ease;
}
.primary-nav a:hover,
.primary-nav a[aria-current="page"]{
    color:var(--text);
    background:var(--panel);
}
.search-trigger,
.menu-toggle{
    border:1px solid var(--line);
    background:transparent;
    border-radius:12px;
    padding:9px 13px;
    cursor:pointer;
}
.search-trigger:hover,.menu-toggle:hover{background:var(--panel)}
.menu-toggle{display:none}

.search-modal[hidden]{display:none !important}
.search-modal{
    position:fixed;
    inset:0;
    z-index:180;
    display:grid;
    place-items:start center;
    padding:10vh 20px 20px;
}
.search-backdrop{
    position:absolute;
    inset:0;
    background:rgba(8,8,10,.82);
    backdrop-filter:blur(8px);
}
.search-panel{
    position:relative;
    width:min(720px,100%);
    padding:34px;
    border:1px solid var(--line);
    border-radius:24px;
    background:var(--panel);
    box-shadow:var(--shadow);
}
.search-panel h2{margin-bottom:24px}
.search-close{
    position:absolute;
    right:18px;
    top:16px;
    width:42px;
    height:42px;
    border:0;
    border-radius:50%;
    background:var(--bg);
    color:var(--text);
    font-size:1.5rem;
    cursor:pointer;
}
.search-form label{display:block;margin-bottom:8px;color:var(--muted);font-size:.9rem}
.search-row{display:flex;gap:10px}
.search-row input{
    min-width:0;
    flex:1;
    border:1px solid var(--line);
    border-radius:12px;
    background:var(--bg);
    color:var(--text);
    padding:13px 15px;
    outline:none;
}
.search-row input:focus{border-color:var(--copper);box-shadow:0 0 0 3px rgba(208,138,72,.12)}
.search-row button{
    border:0;
    border-radius:12px;
    background:var(--amber);
    color:var(--ink);
    font-weight:800;
    padding:0 20px;
    cursor:pointer;
}

.eyebrow{
    margin:0 0 12px;
    color:var(--copper);
    font-size:.77rem;
    font-weight:820;
    letter-spacing:.14em;
    text-transform:uppercase;
}
.section,
.hero,
.inner-main,
.breadcrumbs,
.search-page-head{
    width:min(var(--max),calc(100% - 48px));
    margin-left:auto;
    margin-right:auto;
}
.section{padding:88px 0;border-top:1px solid var(--line-soft)}
.narrow-section{width:min(1000px,calc(100% - 48px))}
.section-heading{max-width:760px;margin-bottom:40px}
.section-heading>p:last-child{margin-top:14px;margin-bottom:0}
.split-heading{
    max-width:none;
    display:grid;
    grid-template-columns:minmax(0,1.05fr) minmax(260px,.65fr);
    gap:56px;
    align-items:end;
}
.split-heading>p{margin:0 0 3px}
.compact-heading{margin-bottom:28px}

.editorial-hero{
    min-height:calc(100vh - 76px);
    padding:70px 0 78px;
    display:grid;
    grid-template-columns:minmax(0,1.08fr) minmax(370px,.72fr);
    gap:70px;
    align-items:center;
}
.hero-copy h1{max-width:860px}
.hero-lead{
    max-width:760px;
    margin:26px 0 0;
    color:#D4CFD1;
    font-size:clamp(1.05rem,1.7vw,1.22rem);
    line-height:1.82;
}
.hero-actions{
    display:flex;
    align-items:center;
    flex-wrap:wrap;
    gap:18px 22px;
    margin-top:32px;
}
.button{
    display:inline-flex;
    justify-content:center;
    align-items:center;
    min-height:48px;
    padding:0 20px;
    border-radius:12px;
    font-weight:800;
    transition:transform .16s ease,filter .16s ease;
}
.button:hover{transform:translateY(-1px);filter:brightness(1.06);color:inherit}
.button.primary{background:var(--brand);color:white}
.button.secondary{background:var(--amber);color:var(--ink)}
.text-link{
    display:inline-flex;
    align-items:center;
    gap:8px;
    color:#DDD7D9;
    border-bottom:1px solid var(--line);
    padding-bottom:2px;
}
.text-link::after{content:"→";color:var(--copper)}
.text-link.strong{font-weight:760}
.hero-notes{
    list-style:none;
    display:flex;
    flex-wrap:wrap;
    gap:9px;
    margin-top:34px;
}
.hero-notes li{
    border:1px solid var(--line);
    border-radius:999px;
    padding:7px 11px;
    color:var(--muted);
    font-size:.86rem;
    background:rgba(34,34,38,.55);
}
.hero-media{
    position:relative;
    align-self:stretch;
    min-height:540px;
    border-radius:30px;
    overflow:hidden;
    border:1px solid var(--line);
    background:var(--panel);
    box-shadow:var(--shadow);
}
.cover-image{width:100%;height:100%;object-fit:cover}
.hero-media::after{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(to top,rgba(18,18,20,.78),transparent 45%);
    pointer-events:none;
}
.hero-media figcaption{
    position:absolute;
    left:24px;
    right:24px;
    bottom:20px;
    z-index:2;
    color:#E7E1E3;
    font-size:.9rem;
}

.route-list{list-style:none;border-top:1px solid var(--line)}
.route-list li{border-bottom:1px solid var(--line)}
.route-list a{
    display:grid;
    grid-template-columns:minmax(260px,.8fr) minmax(0,1.25fr);
    gap:34px;
    align-items:center;
    padding:24px 4px;
}
.route-list strong{font-size:1.08rem}
.route-list span{color:var(--muted)}
.route-list a::after{content:"↗";grid-column:3;color:var(--copper);font-size:1.1rem}

.feature-strip{
    display:grid;
    grid-template-columns:minmax(0,.95fr) minmax(0,1fr);
    gap:64px;
    align-items:center;
}
.feature-visual{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);background:var(--panel)}
.wide-image{width:100%;aspect-ratio:16/10;object-fit:cover}
.feature-copy p{margin-top:18px}
.feature-copy .text-link{margin-top:8px}

.checklist-grid{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    border-top:1px solid var(--line);
    border-left:1px solid var(--line);
}
.check-item{
    min-height:270px;
    padding:30px;
    border-right:1px solid var(--line);
    border-bottom:1px solid var(--line);
    background:linear-gradient(145deg,rgba(34,34,38,.8),rgba(23,23,26,.28));
}
.check-number{display:block;margin-bottom:34px;color:var(--brand-soft);font-weight:820;font-size:.83rem}
.check-item h3{margin-bottom:14px;font-size:1.28rem}
.check-item p{margin:0}

.app-home{
    display:grid;
    grid-template-columns:minmax(0,.92fr) minmax(430px,1.08fr);
    gap:70px;
    align-items:center;
}
.app-home-copy .button{margin-top:16px}
.plain-points{list-style:none;margin:24px 0}
.plain-points li{position:relative;padding:11px 0 11px 24px;border-bottom:1px solid var(--line-soft);color:#D3CDCF}
.plain-points li::before{content:"";position:absolute;left:2px;top:23px;width:7px;height:7px;border-radius:50%;background:var(--copper)}
.plain-points.two-col{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:30px}
.image-pair{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.portrait-image{width:100%;aspect-ratio:4/5;object-fit:cover;border:1px solid var(--line);border-radius:18px}
.image-pair .portrait-image:nth-child(2){margin-top:44px}

.info-rail{display:grid;grid-template-columns:minmax(0,.95fr) minmax(380px,.75fr);gap:64px;align-items:start}
.info-rail .compact-heading{grid-column:1/-1}
.timeline{list-style:none;counter-reset:step}
.timeline li{position:relative;padding:0 0 30px 45px;counter-increment:step}
.timeline li::before{
    content:counter(step);
    position:absolute;
    left:0;
    top:1px;
    width:27px;
    height:27px;
    border:1px solid var(--line);
    border-radius:50%;
    display:grid;
    place-items:center;
    color:var(--copper);
    font-size:.76rem;
    font-weight:800;
}
.timeline li:not(:last-child)::after{content:"";position:absolute;left:13px;top:31px;bottom:4px;width:1px;background:var(--line)}
.timeline strong{display:block;margin-bottom:4px}
.timeline span{color:var(--muted)}
.rail-visual{border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}

.faq-preview{display:grid;grid-template-columns:minmax(300px,.8fr) minmax(0,1.2fr);gap:60px;align-items:start}
.faq-preview-intro{display:grid;gap:26px}
.square-image{width:100%;aspect-ratio:1/1;object-fit:cover;border:1px solid var(--line);border-radius:var(--radius)}
.mini-faq-list details,.faq-list details{border-top:1px solid var(--line)}
.mini-faq-list details:last-child,.faq-list details:last-child{border-bottom:1px solid var(--line)}
.mini-faq-list summary,.faq-list summary{list-style:none;cursor:pointer;color:var(--text);font-weight:700;padding:20px 34px 20px 0;position:relative}
.mini-faq-list summary::-webkit-details-marker,.faq-list summary::-webkit-details-marker{display:none}
.mini-faq-list summary::after,.faq-list summary::after{content:"+";position:absolute;right:3px;top:18px;color:var(--copper);font-size:1.4rem;font-weight:400}
.mini-faq-list details[open] summary::after,.faq-list details[open] summary::after{content:"−"}
.mini-faq-list details p{padding:0 0 20px;margin:0}
.faq-preview>.text-link{grid-column:2;justify-self:start;margin-top:-34px}

.submission-teaser{
    display:grid;
    grid-template-columns:minmax(0,1fr) minmax(360px,.75fr);
    gap:64px;
    align-items:center;
}
.submission-teaser>img{border:1px solid var(--line);border-radius:var(--radius)}
.submission-teaser p:not(.eyebrow){margin-top:18px}

.note-section{padding-top:58px;padding-bottom:58px}
.note-card{
    width:min(900px,100%);
    padding:36px 40px;
    border-left:3px solid var(--copper);
    background:var(--panel);
    border-radius:0 var(--radius-sm) var(--radius-sm) 0;
}
.note-card p:last-child{margin:16px 0 0}
.wide-note{width:100%}

.final-index{display:grid;grid-template-columns:minmax(0,.72fr) minmax(0,1.28fr);gap:70px;align-items:start}
.final-index-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.final-index-links>a{
    min-height:132px;
    padding:22px;
    border:1px solid var(--line);
    border-radius:16px;
    background:rgba(34,34,38,.55);
    transition:background .18s ease,border-color .18s ease,transform .18s ease;
}
.final-index-links>a:hover{background:var(--panel);border-color:#4B4648;transform:translateY(-2px)}
.final-index-links strong{display:block;margin-bottom:9px}
.final-index-links span{display:block;color:var(--muted);font-size:.93rem}
.final-index-links.three-col{grid-template-columns:repeat(3,minmax(0,1fr))}

/* inner pages */
.inner-main{padding-top:18px}
.breadcrumbs{padding-top:18px;padding-bottom:18px}
.breadcrumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;color:var(--muted);font-size:.88rem}
.breadcrumbs li{display:flex;align-items:center;gap:6px}
.breadcrumbs li:not(:last-child)::after{content:"/";color:#5F595B}
.breadcrumbs a:hover{color:var(--copper)}

.inner-hero{
    width:min(var(--max),calc(100% - 48px));
    margin:22px auto 0;
    min-height:430px;
    display:grid;
    grid-template-columns:minmax(0,1.15fr) minmax(320px,.65fr);
    gap:56px;
    align-items:center;
    padding:48px;
    border:1px solid var(--line);
    border-radius:28px;
    background:linear-gradient(135deg,rgba(34,34,38,.96),rgba(26,24,27,.78));
    overflow:hidden;
}
.inner-hero h1{font-size:clamp(2.2rem,4.8vw,4.3rem)}
.inner-hero-image{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:20px;border:1px solid var(--line)}

.prose-section{display:grid;grid-template-columns:minmax(240px,.48fr) minmax(0,1fr);gap:70px}
.prose-heading{position:sticky;top:110px;align-self:start}
.prose-columns{columns:2;column-gap:38px}
.prose-columns p{break-inside:avoid;color:#CFC8CA;margin:0 0 1.2em}

.step-list{border-top:1px solid var(--line)}
.step-item{display:grid;grid-template-columns:90px minmax(0,1fr);gap:24px;padding:30px 0;border-bottom:1px solid var(--line)}
.step-item>span{color:var(--brand-soft);font-weight:850;font-size:1.8rem;line-height:1}
.step-item h3{margin-bottom:9px;font-size:1.25rem}
.step-item p{margin:0;max-width:820px}

.scenario-stack{display:grid;gap:18px}
.scenario-row{display:grid;grid-template-columns:210px minmax(0,1fr);gap:30px;align-items:center;padding:18px;border:1px solid var(--line);border-radius:18px;background:rgba(34,34,38,.4)}
.scenario-image{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:13px}
.scenario-row h3{margin-bottom:8px}
.scenario-row p{margin:0}

.caution-box{padding:40px;border:1px solid rgba(229,154,58,.36);border-radius:var(--radius);background:linear-gradient(135deg,rgba(229,154,58,.08),rgba(34,34,38,.35))}
.relation-section,.submit-next,.safety-close,.terms-links,.faq-routing{display:grid;grid-template-columns:minmax(0,.75fr) minmax(320px,.65fr);gap:60px;align-items:start}
.related-links{display:grid;border-top:1px solid var(--line)}
.related-links a{padding:15px 0;border-bottom:1px solid var(--line);color:#DDD7D9}
.related-links a::after{content:"→";float:right;color:var(--copper)}
.related-links a:hover{color:white}

.numbered-list{list-style:none;counter-reset:item;max-width:900px}
.numbered-list li{counter-increment:item;position:relative;padding:20px 0 20px 58px;border-bottom:1px solid var(--line);color:#D1CBCD}
.numbered-list li::before{content:counter(item,decimal-leading-zero);position:absolute;left:0;top:19px;color:var(--brand-soft);font-weight:820}
.numbered-list.compact-list li{padding-top:16px;padding-bottom:16px}

.boundary-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.boundary-cards article{padding:26px;border:1px solid var(--line);border-radius:16px;background:var(--panel)}
.boundary-cards h3{margin-bottom:12px}
.boundary-cards p{margin:0}

.source-section,.compare-section,.search-privacy{display:grid;grid-template-columns:minmax(0,1fr) minmax(340px,.82fr);gap:58px;align-items:center}
.source-section>img,.compare-section>img,.search-privacy>img{border:1px solid var(--line);border-radius:var(--radius)}
.privacy-callout,.emergency-note,.third-party-note{
    max-width:980px;
    padding:46px;
    border:1px solid var(--line);
    border-radius:var(--radius);
    background:var(--panel);
}
.privacy-callout h2,.emergency-note h2,.third-party-note h2{max-width:820px}
.privacy-callout p:not(.eyebrow),.emergency-note p:not(.eyebrow),.third-party-note p:not(.eyebrow){margin-top:18px}
.inline-links{display:flex;gap:24px;flex-wrap:wrap;margin-top:26px}
.inline-links a{color:var(--copper);font-weight:740;border-bottom:1px solid rgba(208,138,72,.35)}

.domain-card{padding:34px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel)}
.domain-card span{display:block;color:var(--muted);font-size:.84rem;margin-bottom:8px}
.domain-card strong{display:block;font-size:clamp(1.45rem,3vw,2.5rem);letter-spacing:-.03em;word-break:break-word}
.domain-card p{margin:16px 0 0}
.guide-list{border-top:1px solid var(--line)}
.guide-list article{display:grid;grid-template-columns:70px minmax(0,1fr);gap:20px;padding:26px 0;border-bottom:1px solid var(--line)}
.guide-index{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--panel);color:var(--copper);font-weight:800}
.guide-list h3{margin-bottom:8px}
.guide-list p{margin:0;max-width:900px}
.app-relation{max-width:920px;margin-left:auto;margin-right:auto}

.faq-list{max-width:930px}
.faq-list summary{display:flex;gap:18px;padding:24px 42px 24px 0;font-size:1.03rem}
.faq-list summary span{color:var(--brand-soft);font-size:.78rem;min-width:24px;margin-top:3px}
.faq-answer{padding:0 40px 24px 42px}
.faq-answer p{margin:0;color:#CBC4C6}

.editorial-list{border-top:1px solid var(--line)}
.editorial-list article{display:grid;grid-template-columns:76px minmax(0,1fr);gap:22px;padding:30px 0;border-bottom:1px solid var(--line)}
.editorial-list>article>span{font-size:1.35rem;color:var(--brand-soft);font-weight:850}
.editorial-list h3{margin-bottom:9px}
.editorial-list p{margin:0;max-width:900px}
.principle-band{padding:48px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel)}
.principle-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;margin-top:30px;background:var(--line)}
.principle-grid>div{padding:22px;background:var(--panel)}
.principle-grid strong{display:block;margin-bottom:8px}
.principle-grid span{display:block;color:var(--muted);font-size:.92rem}

.safety-list{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.safety-list article{display:flex;gap:18px;padding:26px;border:1px solid var(--line);border-radius:16px;background:rgba(34,34,38,.6)}
.safety-list article:last-child{grid-column:1/-1}
.risk-mark{color:var(--amber);font-weight:850}
.safety-list h3{margin-bottom:8px}
.safety-list p{margin:0}

.privacy-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.privacy-grid article{padding:28px;border:1px solid var(--line);border-radius:16px;background:var(--panel)}
.privacy-grid h3{margin-bottom:10px}
.privacy-grid p{margin:0}

.feedback-format .numbered-list{max-width:100%}
.no-channel-note{padding-top:54px;padding-bottom:54px}

/* search and error */
.search-page-head{padding:70px 0 38px;max-width:900px}
.search-page-head h1{font-size:clamp(2.2rem,5vw,4.2rem)}
.search-page-head>p:not(.eyebrow){margin-top:18px;max-width:720px}
.standalone-search{margin-top:28px;padding:24px;border:1px solid var(--line);border-radius:16px;background:var(--panel)}
.result-list{display:grid;gap:12px;max-width:900px}
.result-list article{padding:24px 0;border-bottom:1px solid var(--line)}
.result-list article:first-child{border-top:1px solid var(--line)}
.result-list h3 a:hover{color:var(--copper)}
.result-list p{margin:8px 0 0}
.error-page{min-height:70vh;display:grid;place-items:center;padding:70px 0}
.error-card{width:min(900px,100%);text-align:left}
.error-card h1{font-size:clamp(2.4rem,6vw,5rem)}
.error-card>p:not(.eyebrow){max-width:700px;margin-top:20px;margin-bottom:32px}

/* footer */
.site-footer{margin-top:30px;border-top:1px solid var(--line);background:var(--ink)}
.footer-grid{
    width:min(var(--max),calc(100% - 48px));
    margin:0 auto;
    display:grid;
    grid-template-columns:minmax(0,1.25fr) minmax(180px,.7fr) minmax(180px,.7fr);
    gap:70px;
    padding:60px 0 46px;
}
.footer-grid h2{font-size:1.06rem;margin-bottom:16px}
.footer-grid p{max-width:480px;margin:0}
.footer-grid ul{list-style:none}
.footer-grid li+li{margin-top:9px}
.footer-grid a{color:var(--muted);font-size:.94rem}
.footer-grid a:hover{color:var(--text)}
.footer-bottom{
    width:min(var(--max),calc(100% - 48px));
    margin:0 auto;
    min-height:72px;
    border-top:1px solid #29292E;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:24px;
}
.footer-bottom p{margin:0;font-size:.85rem}
.back-top{color:var(--copper);font-size:.86rem}

@media (max-width:1100px){
    .header-shell{gap:15px}
    .primary-nav a{padding:0 9px;font-size:.9rem}
    .editorial-hero{grid-template-columns:1fr 380px;gap:42px}
    .hero-media{min-height:480px}
    .inner-hero{padding:38px;gap:38px}
    .app-home{grid-template-columns:1fr 1fr;gap:44px}
    .principle-grid{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:900px){
    .header-shell{width:min(100% - 32px,var(--max));min-height:68px;position:relative}
    .menu-toggle{display:inline-flex;margin-left:auto}
    .search-trigger{font-size:0;padding:9px 11px}
    .search-trigger::before{content:"搜索";font-size:.9rem}
    .primary-nav{
        display:none;
        position:absolute;
        left:0;
        right:0;
        top:58px;
        padding:12px;
        border:1px solid var(--line);
        border-radius:16px;
        background:var(--panel);
        box-shadow:var(--shadow);
        flex-direction:column;
        align-items:stretch;
    }
    .primary-nav.is-open{display:flex}
    .primary-nav a{padding:0 14px}
    .section,.hero,.inner-main,.breadcrumbs,.search-page-head{width:min(100% - 32px,var(--max))}
    .section{padding:70px 0}
    .editorial-hero{min-height:auto;padding:54px 0 64px;grid-template-columns:1fr;gap:38px}
    .hero-media{min-height:420px}
    .split-heading{grid-template-columns:1fr;gap:16px}
    .route-list a{grid-template-columns:1fr;gap:8px}
    .route-list a::after{display:none}
    .feature-strip,.app-home,.info-rail,.submission-teaser,.final-index,
    .prose-section,.source-section,.compare-section,.search-privacy,
    .relation-section,.submit-next,.safety-close,.terms-links,.faq-routing{grid-template-columns:1fr;gap:38px}
    .info-rail .compact-heading{grid-column:auto}
    .faq-preview{grid-template-columns:1fr;gap:34px}
    .faq-preview-intro{grid-template-columns:200px 1fr;align-items:center}
    .faq-preview>.text-link{grid-column:auto;justify-self:start;margin-top:0}
    .inner-hero{grid-template-columns:1fr;padding:34px;margin-top:12px;width:min(100% - 32px,var(--max))}
    .inner-hero-image{max-height:340px;aspect-ratio:16/9}
    .prose-heading{position:static}
    .boundary-cards{grid-template-columns:1fr}
    .final-index-links.three-col{grid-template-columns:1fr 1fr}
    .footer-grid{width:min(100% - 32px,var(--max));grid-template-columns:1fr 1fr;gap:38px}
    .footer-grid section:first-child{grid-column:1/-1}
    .footer-bottom{width:min(100% - 32px,var(--max))}
}

@media (max-width:700px){
    body{font-size:15px}
    h1{font-size:clamp(2.2rem,12vw,3.6rem)}
    .hero-media{min-height:330px;border-radius:22px}
    .hero-actions{align-items:stretch;flex-direction:column}
    .button{width:100%}
    .hero-notes{display:grid}
    .checklist-grid{grid-template-columns:1fr}
    .app-home{gap:30px}
    .image-pair{gap:10px}
    .image-pair .portrait-image:nth-child(2){margin-top:26px}
    .plain-points.two-col{grid-template-columns:1fr}
    .faq-preview-intro{grid-template-columns:1fr}
    .square-image{max-height:320px;aspect-ratio:16/9}
    .final-index-links,.final-index-links.three-col{grid-template-columns:1fr}
    .inner-hero{padding:25px;border-radius:20px}
    .inner-hero h1{font-size:clamp(2rem,10vw,3.2rem)}
    .prose-columns{columns:1}
    .step-item{grid-template-columns:52px 1fr}
    .step-item>span{font-size:1.3rem}
    .scenario-row{grid-template-columns:1fr}
    .scenario-image{aspect-ratio:16/9}
    .caution-box,.privacy-callout,.emergency-note,.third-party-note,.principle-band{padding:28px}
    .safety-list,.privacy-grid{grid-template-columns:1fr}
    .safety-list article:last-child{grid-column:auto}
    .principle-grid{grid-template-columns:1fr}
    .search-row{flex-direction:column}
    .search-row button{min-height:46px}
    .search-panel{padding:28px 22px}
    .footer-grid{grid-template-columns:1fr}
    .footer-grid section:first-child{grid-column:auto}
    .footer-bottom{padding:20px 0;align-items:flex-start;flex-direction:column}
}

@media (max-width:480px){
    .section,.hero,.inner-main,.breadcrumbs,.search-page-head{width:min(100% - 24px,var(--max))}
    .header-shell{width:min(100% - 24px,var(--max))}
    .brand-mark span{font-size:.95rem}
    .brand-logo{width:34px;height:34px}
    .editorial-hero{padding-top:42px}
    .hero-media{min-height:280px}
    .section{padding:58px 0}
    .check-item{min-height:auto;padding:24px}
    .note-card{padding:28px 24px}
    .route-list a{padding:20px 2px}
    .inner-hero{width:min(100% - 24px,var(--max));padding:22px}
    .inner-hero-image{max-height:280px}
    .domain-card{padding:25px}
    .guide-list article,.editorial-list article{grid-template-columns:48px 1fr}
    .faq-answer{padding-left:0;padding-right:0}
    .faq-list summary{gap:10px}
    .privacy-callout,.emergency-note,.third-party-note,.principle-band{padding:24px}
    .footer-grid,.footer-bottom{width:min(100% - 24px,var(--max))}
}

@media (prefers-reduced-motion:reduce){
    *,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}
}