:root{
  --brand:#7C5C8E;--brand2:#B89ABF;--ink:#302C33;--ink2:#25212A;--muted:#726B76;
  --paper:#F8F5F3;--soft:#EEE8EF;--accent:#D58A45;--white:#fff;--line:rgba(48,44,51,.14);
  --shadow:0 18px 48px rgba(37,33,42,.08);--r1:30px;--r2:20px;--max:1180px
}
*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--paper)}body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased}body.is-locked{overflow:hidden}
img{display:block;max-width:100%;height:auto}a{color:inherit;text-decoration:none}button,input{font:inherit}code{padding:.15em .42em;border-radius:6px;background:var(--soft)}
.container{width:min(calc(100% - 48px),var(--max));margin-inline:auto}.narrow{width:min(calc(100% - 48px),820px)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:fixed;left:20px;top:12px;z-index:200;padding:10px 14px;border-radius:10px;background:var(--ink2);color:#fff;transform:translateY(-180%)}.skip-link:focus{transform:translateY(0)}
.site-header{position:sticky;top:0;z-index:100;border-bottom:1px solid rgba(48,44,51,.08);background:rgba(248,245,243,.94);backdrop-filter:blur(14px)}
.header-inner{min-height:78px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:26px}.brand-mark{display:inline-flex;align-items:center;gap:12px}.brand-mark img{width:44px;height:44px;object-fit:cover;border-radius:14px;box-shadow:0 8px 20px rgba(124,92,142,.16)}.brand-mark span{display:grid;line-height:1.25}.brand-mark strong{color:var(--ink2);font-size:17px}.brand-mark small{margin-top:3px;color:var(--muted);font-size:11px}
.main-nav{display:flex;justify-content:center;gap:4px}.main-nav a{padding:9px 12px;border-radius:10px;color:var(--muted);font-size:14px}.main-nav a:hover,.main-nav a[aria-current=page]{color:var(--ink2);background:var(--soft)}
.search-trigger,.menu-toggle{border:0;cursor:pointer}.search-trigger{padding:10px 14px;border-radius:999px;color:#fff;background:var(--ink2)}.search-trigger:hover{background:var(--brand)}
.menu-toggle{display:none;width:44px;height:44px;padding:11px;border-radius:12px;background:var(--soft)}.menu-toggle span:not(.sr-only){display:block;height:2px;margin:4px 0;background:var(--ink2)}
.search-modal[hidden]{display:none!important}.search-modal{position:fixed;inset:0;z-index:180;display:grid;place-items:start center;padding:110px 24px 40px}.search-modal__backdrop{position:absolute;inset:0;background:rgba(37,33,42,.58);backdrop-filter:blur(5px)}.search-modal__dialog{position:relative;z-index:1;width:min(680px,100%);padding:38px;border-radius:var(--r1);background:var(--paper);box-shadow:0 30px 100px rgba(37,33,42,.28)}.search-modal__dialog h2{margin:4px 0 20px;font-size:clamp(28px,5vw,42px);line-height:1.15}.search-modal__close{position:absolute;right:18px;top:16px;width:38px;height:38px;border:0;border-radius:50%;background:var(--soft);font-size:26px;cursor:pointer}
.search-form label{display:block;margin-bottom:8px;color:var(--muted);font-size:13px}.search-form__row{display:flex;gap:10px}.search-form input{min-width:0;flex:1;padding:14px 16px;border:1px solid var(--line);border-radius:12px;outline:none;background:#fff}.search-form input:focus{border-color:var(--brand);box-shadow:0 0 0 4px rgba(124,92,142,.1)}.search-form button{padding:13px 18px;border:0;border-radius:12px;color:#fff;background:var(--brand);cursor:pointer}
.site-main{min-height:60vh}.eyebrow{display:inline-block;color:var(--brand);font-size:12px;font-weight:700;letter-spacing:.12em}.lede{color:#4f4953;font-size:clamp(17px,2vw,20px);line-height:1.8}
.home-cover{padding:58px 0 66px}.home-cover__grid,.page-intro__grid,.article-hero__grid{display:grid;grid-template-columns:minmax(0,.92fr) minmax(420px,1.08fr);gap:60px;align-items:center}
.home-cover__copy h1,.page-intro h1,.article-hero h1{margin:10px 0 20px;color:var(--ink2);font-size:clamp(42px,5.8vw,72px);line-height:1.06;letter-spacing:-.04em}.home-cover__media{margin:0;position:relative}.home-cover__media:before{content:"";position:absolute;inset:8% -6% -8% 10%;z-index:-1;border-radius:36px;background:var(--soft)}.home-cover__media img,.page-intro__grid>img,.article-hero__grid>img{width:100%;aspect-ratio:1.35/1;object-fit:cover;border-radius:30px 30px 110px 30px;box-shadow:var(--shadow)}.home-cover__media figcaption{margin:13px 0 0 22%;color:var(--muted);font-size:12px}
.button-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 18px;border:1px solid transparent;border-radius:999px;font-weight:650}.btn-primary{color:#fff;background:var(--brand)}.btn-secondary{color:var(--ink2);border-color:var(--line);background:#fff}.btn-light{color:var(--ink2);background:var(--paper)}.cover-note{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;margin-top:34px;padding-top:20px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}.cover-note small{grid-column:2}
.section{padding:88px 0}.section--tight{padding-top:58px}.section--soft{background:var(--soft)}.section--dark{color:rgba(255,255,255,.82);background:var(--ink2)}.section--closing{padding-bottom:108px}.section--dark .eyebrow{color:#dbc7e0}.section--dark h2,.section--dark h3,.section--dark strong{color:#fff}.section--dark p{color:rgba(255,255,255,.7)}
.section-heading{max-width:780px;margin-bottom:34px}.section-heading--split{max-width:none;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(280px,.7fr);gap:48px;align-items:end}
.section-heading h2,.guide-feature h2,.auxiliary-panel h2,.brand-index h2,.split-note h2,.closing-grid h2,.two-column-copy h2,.brand-domain h2{margin:6px 0 12px;color:var(--ink2);font-size:clamp(30px,4vw,48px);line-height:1.15;letter-spacing:-.025em}.section-heading p,.guide-feature p,.auxiliary-panel p,.split-note p,.closing-grid p,.two-column-copy p{margin:0;color:var(--muted)}
.collection-ribbon,.scenario-list,.term-table,.faq-list{border-top:1px solid var(--line)}.collection-item{display:grid;grid-template-columns:260px 1fr;gap:34px;padding:30px 0;border-bottom:1px solid var(--line);align-items:center}.collection-item img{width:100%;aspect-ratio:1.65/1;object-fit:cover;border-radius:20px}.collection-item h3{margin:8px 0 9px;color:var(--ink2);font-size:clamp(22px,2.8vw,32px);line-height:1.28}.collection-item p{margin:0 0 12px;color:var(--muted)}
.tag-row{display:flex;flex-wrap:wrap;gap:7px}.tag-row span{padding:4px 9px;border:1px solid rgba(124,92,142,.2);border-radius:999px;color:var(--brand);background:rgba(124,92,142,.06);font-size:11px}.text-link{display:inline-flex;gap:8px;align-items:center;color:var(--brand);font-weight:650}.text-link:after{content:"→"}.editorial-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:22px}
.story-card{grid-column:span 6;overflow:hidden;border:1px solid rgba(48,44,51,.08);border-radius:var(--r2);background:var(--paper)}.story-card:nth-child(3n){grid-column:span 12;display:grid;grid-template-columns:minmax(280px,.82fr) 1.18fr}.story-card__media{display:block;overflow:hidden}.story-card__media img{width:100%;aspect-ratio:1.7/1;object-fit:cover}.story-card__body{padding:24px}.story-card h3{margin:8px 0 10px;color:var(--ink2);font-size:24px;line-height:1.3}.story-card p{margin:0 0 15px;color:var(--muted)}.story-card--compact,.story-card--compact:nth-child(3n){grid-column:span 4;display:block}
.section-actions{margin-top:30px;text-align:center}.brand-index,.guide-feature,.related-story{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px;align-items:start}.term-row,.term-table__row{display:grid;grid-template-columns:180px 1fr;gap:22px;padding:20px 0;border-bottom:1px solid var(--line)}.term-row p,.term-table__row p{margin:0}.section--dark .term-row{border-color:rgba(255,255,255,.14)}
.guide-feature{align-items:center}.guide-feature__media{margin:0}.guide-feature__media img{width:100%;aspect-ratio:1/1.08;object-fit:cover;border-radius:100px 24px 24px 24px}.mini-steps{list-style:none;padding:0;margin:26px 0;border-top:1px solid var(--line)}.mini-steps li{display:grid;grid-template-columns:minmax(180px,.42fr) 1fr;gap:22px;padding:16px 0;border-bottom:1px solid var(--line)}.mini-steps span{color:var(--muted);font-size:14px}
.auxiliary-split{display:grid;grid-template-columns:1.1fr .9fr;gap:24px}.auxiliary-panel{padding:32px;border-radius:var(--r1);background:var(--paper)}.auxiliary-panel img{width:100%;margin-bottom:24px;aspect-ratio:2.1/1;object-fit:cover;border-radius:20px}.auxiliary-panel--plain{display:flex;flex-direction:column;justify-content:flex-end;min-height:420px;background:var(--brand)}.auxiliary-panel--plain .eyebrow,.auxiliary-panel--plain h2,.auxiliary-panel--plain p,.auxiliary-panel--plain .text-link{color:#fff}
.faq-item{border-bottom:1px solid var(--line)}.faq-item button{width:100%;display:flex;justify-content:space-between;gap:24px;padding:22px 0;border:0;background:transparent;color:var(--ink2);text-align:left;font-weight:700;cursor:pointer}.faq-item button>span:last-child{color:var(--brand);font-size:22px}.faq-item button[aria-expanded=true]>span:last-child{transform:rotate(45deg)}.faq-answer{padding:0 50px 22px 0;color:var(--muted)}.faq-answer p{margin:0}
.closing-grid,.split-note,.two-column-copy,.ios-baseline,.article-layout{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}.link-stack{border-top:1px solid var(--line)}.link-stack a{display:grid;gap:4px;padding:20px 0;border-bottom:1px solid var(--line)}.link-stack span{color:var(--muted);font-size:14px}
.breadcrumbs{padding-top:24px}.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none;color:var(--muted);font-size:12px}.breadcrumbs li:not(:last-child):after{content:"/";margin-left:8px;color:#aaa2ad}
.page-intro{padding:54px 0 72px}.page-intro--compact{padding-bottom:50px}.page-intro h1,.article-hero h1{font-size:clamp(38px,5vw,62px)}
.scenario-row{display:grid;grid-template-columns:58px 260px 1fr;gap:24px;align-items:center;padding:30px 0;border-bottom:1px solid var(--line)}.scenario-row__number,.step-timeline__index{color:var(--brand2);font-size:14px;font-weight:800}.scenario-row img{width:100%;aspect-ratio:1.65/1;object-fit:cover;border-radius:16px}.scenario-row h2{margin:7px 0 8px;color:var(--ink2);font-size:26px}.scenario-row p{margin:0;color:var(--muted)}
.note-box{padding:26px;border:1px solid rgba(124,92,142,.16);border-radius:var(--r2);background:rgba(124,92,142,.06)}.note-box strong{display:block;margin-bottom:7px;color:var(--ink2);font-size:18px}.note-box p{margin:0 0 18px;color:var(--muted)}.inline-search{display:flex;gap:8px}.inline-search input{min-width:0;flex:1;padding:11px 12px;border:1px solid var(--line);border-radius:10px}.inline-search button{padding:11px 14px;border:0;border-radius:10px;color:#fff;background:var(--brand)}
.brand-domain{display:grid;grid-template-columns:1fr auto;gap:40px;align-items:center;padding:34px;border:1px solid var(--line);border-radius:var(--r1);background:#fff}.domain-chip{padding:14px 18px;border-radius:999px;color:#fff;background:var(--brand);font-weight:700}.two-column-copy a:not(.btn){color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.related-story img{width:100%;aspect-ratio:1.55/1;object-fit:cover;border-radius:24px}.status-card{display:grid;grid-template-columns:1fr auto;gap:12px 20px;padding:26px;border-radius:var(--r2);background:var(--soft)}.status-card span{color:var(--muted)}.check-list{border-top:1px solid var(--line)}.check-list article{display:grid;grid-template-columns:62px 1fr;gap:22px;padding:24px 0;border-bottom:1px solid var(--line)}.check-list article>span{color:var(--brand2);font-weight:800}.check-list h2{margin:0 0 7px;color:var(--ink2);font-size:22px}.check-list p{margin:0;color:var(--muted)}
.step-timeline{position:relative}.step-timeline:before{content:"";position:absolute;left:21px;top:14px;bottom:20px;width:1px;background:var(--brand2)}.step-timeline article{position:relative;display:grid;grid-template-columns:44px 1fr;gap:28px;padding:0 0 44px}.step-timeline__index{z-index:1;width:44px;height:44px;display:grid;place-items:center;border:1px solid rgba(124,92,142,.3);border-radius:50%;background:var(--paper)}.step-timeline h2{margin:4px 0 8px;color:var(--ink2);font-size:28px}.step-timeline p{margin:0 0 10px;color:var(--muted)}
.principles-grid,.safety-lanes,.feedback-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.principles-grid{grid-template-columns:repeat(5,1fr)}.principles-grid article,.safety-lanes article,.feedback-grid article{padding:24px;border:1px solid var(--line);border-radius:var(--r2);background:#fff}.principles-grid span,.safety-lanes span{color:var(--brand2);font-weight:800}.principles-grid p{margin:48px 0 0;font-weight:650}.feedback-grid{grid-template-columns:repeat(3,1fr)}.feedback-grid h2,.safety-lanes h2{color:var(--ink2);font-size:22px}.feedback-grid p,.safety-lanes p,.policy-copy p{color:var(--muted)}.policy-copy h2{margin:34px 0 8px;color:var(--ink2);font-size:26px}
.search-page{padding:54px 0 100px}.search-page h1{margin:8px 0 28px;color:var(--ink2);font-size:clamp(36px,6vw,58px);line-height:1.1}.search-form--page{padding-bottom:30px;border-bottom:1px solid var(--line)}.empty-state{margin-top:36px;padding:30px;border-radius:var(--r2);background:var(--soft)}.search-results article{padding:26px 0;border-bottom:1px solid var(--line)}.search-results h2{margin:5px 0 7px;color:var(--ink2);font-size:24px}.search-results p,.result-count{color:var(--muted)}
.article-hero{padding:50px 0 62px}.article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:74px;padding-bottom:110px}.article-body section{margin-bottom:44px}.article-body h2{margin:0 0 16px;color:var(--ink2);font-size:clamp(28px,3.5vw,38px)}.article-body p,.article-body li{color:#514a55;font-size:17px}.article-aside{position:sticky;top:108px;align-self:start}.aside-links{margin-top:20px;border-top:1px solid var(--line)}.aside-links h2{font-size:17px}.aside-links a{display:block;padding:12px 0;border-bottom:1px solid var(--line);color:var(--muted);font-size:14px}
.error-panel{padding:90px 0 120px}.error-panel h1{font-size:clamp(42px,7vw,72px);line-height:1.05;color:var(--ink2)}
.site-footer{padding:62px 0 28px;color:rgba(255,255,255,.72);background:var(--ink2)}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,.72fr);gap:46px}.footer-brand__title,.site-footer h2{margin:0 0 14px;color:#fff;font-size:16px}.site-footer a{display:block;margin:8px 0;color:rgba(255,255,255,.66);font-size:14px}.footer-bottom{display:flex;justify-content:space-between;gap:24px;margin-top:42px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);font-size:12px}.footer-bottom p{margin:0}
.back-top{position:fixed;right:20px;bottom:20px;z-index:90;width:44px;height:44px;border:0;border-radius:50%;color:#fff;background:var(--brand);box-shadow:var(--shadow);opacity:0;pointer-events:none}.back-top.is-visible{opacity:1;pointer-events:auto}
@media(max-width:1024px){.header-inner{grid-template-columns:auto auto 1fr auto}.menu-toggle{display:block;grid-column:3;justify-self:end}.main-nav{position:absolute;left:20px;right:20px;top:calc(100% + 8px);display:none;flex-direction:column;padding:12px;border:1px solid var(--line);border-radius:16px;background:var(--paper);box-shadow:var(--shadow)}.main-nav.is-open{display:flex}.home-cover__grid,.page-intro__grid,.article-hero__grid,.brand-index,.guide-feature,.related-story{grid-template-columns:1fr 1fr}.story-card--compact,.story-card--compact:nth-child(3n){grid-column:span 6}.principles-grid{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:1.4fr 1fr 1fr}.article-layout{gap:42px;grid-template-columns:minmax(0,1fr) 260px}}
@media(max-width:768px){.container,.narrow{width:min(calc(100% - 32px),var(--max))}.brand-mark small{display:none}.home-cover__grid,.page-intro__grid,.article-hero__grid,.brand-index,.guide-feature,.auxiliary-split,.closing-grid,.split-note,.two-column-copy,.related-story,.ios-baseline,.article-layout{grid-template-columns:1fr}.home-cover__media{order:-1}.section{padding:64px 0}.section-heading--split{grid-template-columns:1fr;gap:12px}.collection-item{grid-template-columns:180px 1fr}.story-card,.story-card:nth-child(3n),.story-card--compact,.story-card--compact:nth-child(3n){grid-column:span 12;display:block}.mini-steps li,.term-row,.term-table__row{grid-template-columns:1fr;gap:6px}.scenario-row{grid-template-columns:48px 1fr}.scenario-row img{grid-column:2}.brand-domain{grid-template-columns:1fr}.article-aside{position:static}.feedback-grid,.footer-grid{grid-template-columns:1fr}.principles-grid,.safety-lanes{grid-template-columns:repeat(2,1fr)}.footer-bottom{flex-direction:column}}
@media(max-width:600px){.search-modal{padding:86px 14px 24px}.search-modal__dialog{padding:30px 22px 22px}.home-cover__media:before{display:none}.button-row .btn{width:100%}.cover-note{grid-template-columns:1fr}.cover-note small{grid-column:auto}.collection-item,.scenario-row{grid-template-columns:1fr}.scenario-row img{grid-column:auto}.principles-grid,.safety-lanes{grid-template-columns:1fr}.inline-search,.search-form__row{flex-direction:column}.status-card{grid-template-columns:1fr}.status-card strong{text-align:left}.faq-answer{padding-right:0}.article-body p,.article-body li{font-size:16px}}
@media(max-width:375px){.container,.narrow{width:min(calc(100% - 24px),var(--max))}.brand-mark strong{font-size:15px}.brand-mark img{width:38px;height:38px}.search-trigger{font-size:12px}.home-cover__copy h1,.page-intro h1,.article-hero h1{font-size:34px}.story-card__body,.auxiliary-panel,.note-box{padding:20px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}


.topic-index-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.topic-index-card{overflow:hidden;border:1px solid var(--line);border-radius:var(--r2);background:#fff}
.topic-index-card>img{width:100%;aspect-ratio:1.65/1;object-fit:cover}
.topic-index-card__body{padding:22px}.topic-index-card h2{margin:9px 0;color:var(--ink2);font-size:22px;line-height:1.35}.topic-index-card p{color:var(--muted)}
.pagination{display:flex;justify-content:center;align-items:center;gap:18px;margin-top:34px}.pagination a{padding:9px 14px;border:1px solid var(--line);border-radius:999px;background:#fff}.pagination span{color:var(--muted)}
@media(max-width:1024px){.topic-index-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.topic-index-grid{grid-template-columns:1fr}.pagination{flex-wrap:wrap}}


.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.case-card{display:grid;grid-template-columns:210px 1fr;gap:22px;padding:18px;border:1px solid var(--line);border-radius:var(--r2);background:#fff}
.case-card>img{width:100%;height:100%;min-height:180px;object-fit:cover;border-radius:14px}
.case-card h2{margin:8px 0;color:var(--ink2);font-size:22px;line-height:1.35}.case-card p{margin:0 0 12px;color:var(--muted)}
@media(max-width:1024px){.case-grid{grid-template-columns:1fr}}@media(max-width:600px){.case-card{grid-template-columns:1fr}.case-card>img{height:auto;aspect-ratio:1.7/1}}