:root{--paper:#f6f4ef;--card:#fffefb;--ink:#171a20;--muted:#56616d;--blue:#145ff5;--purple:#6950e8;--line:rgba(23,26,32,.13)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:95px}body{margin:0;color:var(--ink);background:var(--paper);font:16px/1.8 "PingFang SC","Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:5px}img{max-width:100%;height:auto}h1,h2,h3,p{margin:0}h1,h2{font-family:BrandSerif,"Songti SC","Noto Serif SC",serif;font-weight:700;letter-spacing:-.035em}h1{font-size:clamp(40px,4.9vw,70px);line-height:1.24}h2{font-size:clamp(28px,3vw,42px);line-height:1.4}h3{font-size:19px;line-height:1.5}p{color:var(--muted)}.wrap{width:min(1184px,calc(100% - 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var(--purple);padding-left:26px}.skip{position:fixed;left:12px;top:8px;background:var(--blue);color:white;padding:8px;z-index:10;transform:translateY(-170%)}.skip:focus{transform:none}@media(max-width:1000px){.wrap{width:calc(100% - 48px)}.site-header{gap:18px}nav{gap:17px}.hero{gap:35px;padding-block:60px}.hero-proof{padding:18px}.article-sheet{padding:23px}.article-sheet h2{font-size:31px}.case-layout{gap:30px;grid-template-columns:.7fr 1fr}.duo{gap:35px}.principles>div{padding:0 22px}}@media(max-width:700px){.wrap{width:calc(100% - 36px)}.site-header{height:auto;min-height:80px;flex-wrap:wrap;padding-block:15px;gap:15px}.brand{font-size:14px}.brand img{width:29px;height:29px}.site-header>.button{margin-left:auto}.site-header nav{width:100%;order:3;justify-content:space-between;margin:0;gap:10px;font-size:12px;border-top:1px solid var(--line);padding-top:5px}.hero{grid-template-columns:1fr;gap:37px;padding-block:45px}.hero 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/* 接收端与真实操作素材；裁切只改变展示窗口，原始公开素材可点击查看。 */
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.platform-logo.wordmark{width:104px;background:#ce103a;padding:4px 6px;border-radius:4px}.platform-cell .wordmark{width:86px}
/* 首屏展示用户提供的完整界面截图，不裁掉文章入口和平台选择。 */
.hero-interface{max-width:464px;width:100%;margin-left:auto}.interface-image{display:block;overflow:hidden;border:1px solid var(--line);border-radius:5px;background:#f6f7fc}.interface-image img{display:block;width:100%;height:auto}.hero-interface figcaption{font-size:10px;line-height:1.8}.progress-proof .progress-crop{max-width:430px;margin:18px auto;width:calc(100% - 36px)}
@media(min-width:1001px){.hero:has(.hero-interface){grid-template-columns:1.15fr .85fr;gap:70px;padding-block:50px}}
@media(max-width:700px){.hero-interface{max-width:430px;margin-left:0}.hero-interface .proof-top{font-size:9px;gap:8px}.hero-interface .mono{font-size:9px}.progress-proof .progress-crop{width:calc(100% - 24px);margin:12px auto}}
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@media(max-width:800px){.campaign-footer{align-items:start;flex-direction:column;gap:15px}.campaign-section .section-heading{display:block}.campaign-intro{margin-top:17px}.share-content{gap:20px}.share-choices{grid-template-columns:1fr}.share-choices label{padding:10px}.share-header h2{font-size:24px}}
@media(max-width:600px){.share-actions{width:100%;flex-wrap:wrap}.share-actions .button{flex:1;font-size:12px;padding:12px}.hero-more{gap:20px}.share-dialog{width:calc(100% - 20px);max-height:calc(100dvh - 20px)}.share-header{padding:17px 18px}.share-header h2{font-size:22px}.share-header .eyebrow{font-size:8px}.share-content{display:flex;flex-direction:column;padding:17px 18px 23px;gap:19px}.share-preview-panel{width:100%;min-height:180px;padding:12px}.poster-preview{max-height:340px}.share-controls{width:100%}.share-choices{grid-template-columns:1fr 1fr}.share-choices label{padding:12px 8px;font-size:12px}.share-choices small{font-size:9px}.share-scan{display:none}.share-dialog-actions{grid-template-columns:1fr 1fr}.share-dialog-actions .text-link{grid-column:1/-1}.share-dialog-actions .button{font-size:12px;padding:12px 8px}.share-help{font-size:10px}.campaign-footer p{font-size:11px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}