/* 51吃瓜 - responsive editorial interface */
:root{--red:#B93A32;--orange:#D98A3A;--ink:#252322;--bg:#FAF8F5;--soft:#F2EDE7;--text:#3B3836;--muted:#77716D;--accent:#E05A3F;--line:#ded6cf;--white:#fff;--radius:22px;--shadow:0 18px 45px rgba(80,48,35,.08);--shell:min(1180px,calc(100% - 40px));}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;line-height:1.75;-webkit-font-smoothing:antialiased}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.shell{width:var(--shell);margin-inline:auto}.skip-link{position:absolute;left:12px;top:-80px;padding:10px 16px;background:var(--ink);color:#fff;z-index:999}.skip-link:focus{top:12px}.site-header{position:sticky;top:0;z-index:30;background:rgba(250,248,245,.94);border-bottom:1px solid rgba(222,214,207,.9);backdrop-filter:blur(14px)}.header-row{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:12px}.brand img{width:48px;height:48px;object-fit:contain}.brand span{display:flex;flex-direction:column;line-height:1.2}.brand strong{font-size:1.12rem;color:var(--ink)}.brand small{margin-top:5px;color:var(--muted);font-size:.76rem;letter-spacing:.08em}.site-nav{display:flex;align-items:center;gap:8px}.site-nav a{padding:9px 12px;border-radius:999px;color:#5f5955;font-size:.94rem}.site-nav a:hover,.site-nav a[aria-current=page]{background:var(--soft);color:var(--red)}.menu-toggle{display:none;border:1px solid var(--line);background:var(--white);border-radius:999px;padding:8px 13px;color:var(--ink)}
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:54px;align-items:center;padding-block:74px 58px}.hero-copy h1,.app-hero h1,.submit-hero h1{font-size:clamp(2.4rem,5vw,4.7rem);line-height:1.06;letter-spacing:-.04em;color:var(--ink);margin:.35em 0 .32em}.kicker,.eyebrow{display:inline-block;color:var(--red);font-weight:700;font-size:.78rem;letter-spacing:.09em;text-transform:uppercase}.lede{font-size:1.08rem;color:#5a5551;max-width:760px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:30px 0}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 19px;border-radius:14px;font-weight:700;border:1px solid transparent}.button--primary{background:var(--red);color:#fff}.button--primary:hover{background:#9f302a}.button--quiet{background:var(--white);border-color:var(--line);color:var(--ink)}.button--quiet:hover{border-color:#c7b9af}.hero-media{position:relative}.hero-media:before{content:"";position:absolute;inset:-18px 24px 30px -18px;background:var(--soft);border-radius:32px;z-index:-1}.hero-media img{width:100%;aspect-ratio:1.18;object-fit:cover;border-radius:26px;box-shadow:var(--shadow)}.brand-aliases{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);margin-top:32px;padding-top:22px;gap:18px}.brand-aliases dt{font-size:.78rem;color:var(--muted);margin-bottom:5px}.brand-aliases dd{margin:0;font-size:.94rem;color:var(--ink)}
.section-heading{margin-bottom:28px;max-width:760px}.section-heading h2,.topic-strip h2,.side-panel h2,.service-card h2,.faq-block h2,.split-copy h2,.submission-list h2,.privacy-card h2{font-size:clamp(1.65rem,3vw,2.5rem);line-height:1.18;color:var(--ink);margin:.3em 0}.section-heading p{color:var(--muted);margin:6px 0}.section-heading--row{max-width:none;display:flex;justify-content:space-between;gap:22px;align-items:end}.text-link{font-weight:700;color:var(--red)}.text-link:hover{text-decoration:underline}.lead-grid{padding-block:42px 76px}.feature-stack{display:grid;grid-template-columns:1.25fr .75fr;gap:18px}.feature-main{grid-row:span 5;position:relative;overflow:hidden;border-radius:var(--radius);background:var(--ink);min-height:640px}.feature-main img{width:100%;height:100%;position:absolute;inset:0;object-fit:cover;opacity:.46}.feature-main:after{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(25,20,18,.9),transparent 64%)}.feature-main>div{position:absolute;left:30px;right:30px;bottom:28px;z-index:2;color:#fff}.feature-main h3{font-size:2.2rem;line-height:1.15;margin:9px 0}.feature-main p{color:#e7ded9}.feature-main .eyebrow,.feature-main .text-link{color:#ffd0a2}.story-card{display:grid;grid-template-columns:240px 1fr;border-top:1px solid var(--line);padding-block:24px;gap:24px}.story-card__media{overflow:hidden;border-radius:15px;background:var(--soft)}.story-card__media img{width:100%;height:100%;aspect-ratio:1.45;object-fit:cover;transition:transform .35s ease}.story-card:hover .story-card__media img{transform:scale(1.025)}.story-card h3{font-size:1.25rem;line-height:1.35;color:var(--ink);margin:6px 0}.story-card p{color:var(--muted);margin:0 0 12px;font-size:.94rem}.story-card--compact{display:block;padding:18px 20px;background:var(--white);border:0;border-radius:18px;box-shadow:0 5px 18px rgba(80,48,35,.04)}.story-card--compact .story-card__media{display:none}.story-card--compact h3{font-size:1.06rem}.story-card--compact p{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.story-card--compact .text-link{font-size:.88rem}
.band{background:var(--soft);border-block:1px solid #e8e0d8}.topic-strip{display:grid;grid-template-columns:.85fr 1.15fr;gap:42px;align-items:center;padding-block:44px}.chips{display:flex;flex-wrap:wrap;gap:10px}.chips a,.filter-nav a{display:inline-flex;align-items:center;gap:7px;padding:9px 13px;border:1px solid #d7ccc3;border-radius:999px;background:#fff;color:#5f5752;font-size:.9rem}.chips span{display:inline-grid;place-items:center;min-width:22px;height:22px;border-radius:50%;background:var(--soft);font-size:.72rem}.latest-layout{display:grid;grid-template-columns:1fr 320px;gap:48px;padding-block:76px}.side-panel{align-self:start;position:sticky;top:108px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}.side-panel img{border-radius:14px;aspect-ratio:1.45;object-fit:cover}.side-panel h2{font-size:1.45rem}.side-panel ol{list-style:none;padding:0;margin:0}.side-panel li{padding:14px 0;border-top:1px solid var(--line)}.side-panel li strong,.side-panel li span{display:block}.side-panel li span{color:var(--muted);font-size:.88rem;margin-top:4px}.service-split{display:grid;grid-template-columns:1fr 1fr;gap:24px;padding-bottom:88px}.service-card{overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:var(--radius)}.service-card img{width:100%;aspect-ratio:1.7;object-fit:cover}.service-card>div{padding:28px}.service-card p{color:var(--muted)}.service-card--app{border-top:5px solid var(--red)}.service-card--submit{border-top:5px solid var(--orange)}
.site-footer{background:var(--ink);color:#d9d0cb;padding-top:52px}.footer-grid{display:grid;grid-template-columns:1.4fr .7fr 1fr;gap:44px}.footer-grid h2{font-size:.92rem;color:#fff}.footer-grid a{display:block;margin:7px 0;color:#fff}.footer-grid p{color:#bfb5b0}.footer-brand{font-size:1.5rem;font-weight:800}.footer-bottom{display:flex;justify-content:space-between;border-top:1px solid #47413e;margin-top:40px;padding:22px 0;color:#928985;font-size:.86rem}
.archive-head{padding:66px 0 26px}.archive-head h1{font-size:clamp(2.3rem,5vw,4.2rem);line-height:1.1;color:var(--ink);max-width:850px;margin:10px 0}.archive-head>p{max-width:760px;color:var(--muted);font-size:1.04rem}.filter-nav{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}.filter-nav a[aria-current=page]{background:var(--red);border-color:var(--red);color:#fff}.archive-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 34px;padding-bottom:84px}.archive-grid .story-card{grid-template-columns:160px 1fr}.archive-grid .story-card p{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.article-layout{display:grid;grid-template-columns:minmax(0,760px) 300px;gap:68px;padding:58px 0 88px}.breadcrumbs{display:flex;gap:8px;color:var(--muted);font-size:.84rem;margin-bottom:28px}.article-main h1{font-size:clamp(2.2rem,4.5vw,4rem);line-height:1.12;letter-spacing:-.035em;color:var(--ink);margin:10px 0 20px}.article-summary{font-size:1.18rem;color:#5f5955}.article-figure{margin:36px 0}.article-figure img{width:100%;border-radius:20px;aspect-ratio:1.7;object-fit:cover}.article-figure figcaption{font-size:.82rem;color:var(--muted);margin-top:8px}.prose{font-size:1.05rem}.prose p{margin:0 0 1.35em}.prose h2{font-size:1.55rem;line-height:1.3;color:var(--ink);margin:2em 0 .8em}.article-note{margin-top:34px;background:var(--soft);border-left:4px solid var(--orange);padding:22px;border-radius:0 15px 15px 0}.article-note p{margin:.3em 0 0}.article-aside{align-self:start}.sticky-card{position:sticky;top:110px;border-top:4px solid var(--red);background:#fff;padding:22px;border-radius:0 0 18px 18px;box-shadow:var(--shadow)}.sticky-card h2{font-size:1.25rem;color:var(--ink)}.sticky-card>a{display:block;padding:13px 0;border-top:1px solid var(--line);font-weight:700;font-size:.93rem;line-height:1.45}.sticky-card>a span{display:block;color:var(--muted);font-size:.72rem;font-weight:600;margin-bottom:4px}
.app-hero,.submit-hero{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center;padding:70px 0 62px}.app-hero img,.submit-hero img{border-radius:28px;aspect-ratio:1.22;object-fit:cover;box-shadow:var(--shadow)}.app-checks{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding-bottom:78px}.app-checks article{background:#fff;border:1px solid var(--line);padding:26px;border-radius:20px}.app-checks span{font-size:2.1rem;font-weight:900;color:#e9d6d0}.app-checks h2{font-size:1.35rem;color:var(--ink);margin:4px 0}.app-checks p{color:var(--muted)}.split-copy{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;padding-block:56px}.split-copy img{border-radius:20px;aspect-ratio:1.58;object-fit:cover}.faq-block{padding-block:72px 88px;max-width:900px}.faq-block details{border-top:1px solid var(--line);padding:17px 0}.faq-block summary{font-weight:800;color:var(--ink);cursor:pointer}.faq-block details p{color:var(--muted);margin:.7em 0 0}.submit-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:42px;padding-bottom:78px}.submission-list ol{list-style:none;padding:0;counter-reset:item}.submission-list li{counter-increment:item;padding:20px 0 20px 62px;border-top:1px solid var(--line);position:relative}.submission-list li:before{content:counter(item);position:absolute;left:0;top:22px;width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:var(--red);color:#fff;font-weight:800}.submission-list strong{color:var(--ink);font-size:1.08rem}.submission-list p{margin:.25em 0;color:var(--muted)}.privacy-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px 26px;align-self:start}.privacy-card img{border-radius:14px}.privacy-card h2{font-size:1.45rem}.privacy-card li{margin:.7em 0;color:#5f5955}.status-page{padding:100px 0 120px;max-width:720px}.status-code{font-size:5rem;font-weight:900;color:#e7d6cf}.status-page h1{font-size:2.5rem;color:var(--ink);margin:.2em 0}.status-page p{color:var(--muted);margin-bottom:30px}
:focus-visible{outline:3px solid #e8a67a;outline-offset:3px}@media (max-width:960px){:root{--shell:min(100% - 30px,860px)}.hero,.app-hero,.submit-hero,.topic-strip,.split-copy{grid-template-columns:1fr}.hero-media{max-width:720px}.feature-stack{grid-template-columns:1fr 1fr}.feature-main{grid-column:1/-1;grid-row:auto;min-height:520px}.latest-layout{grid-template-columns:1fr}.side-panel{position:static}.service-split,.archive-grid{grid-template-columns:1fr}.article-layout{grid-template-columns:1fr}.article-aside{display:none}.app-checks{grid-template-columns:1fr}.submit-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}}
@media (max-width:720px){:root{--shell:calc(100% - 24px)}.header-row{min-height:68px}.brand small{display:none}.site-nav{display:none;position:absolute;top:68px;left:12px;right:12px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.site-nav.is-open{display:flex}.site-nav a{padding:11px 13px}.menu-toggle{display:block}.hero,.app-hero,.submit-hero{padding-block:42px 36px;gap:30px}.hero-copy h1,.app-hero h1,.submit-hero h1{font-size:2.55rem}.brand-aliases{grid-template-columns:1fr}.lead-grid{padding-block:28px 52px}.feature-stack{grid-template-columns:1fr}.feature-main{min-height:470px}.feature-main>div{left:20px;right:20px;bottom:20px}.feature-main h3{font-size:1.6rem}.story-card,.archive-grid .story-card{grid-template-columns:115px 1fr;gap:15px;padding-block:18px}.story-card h3{font-size:1.02rem}.story-card p{display:none}.section-heading--row{align-items:start;flex-direction:column}.topic-strip{gap:20px}.latest-layout{padding-block:52px}.service-split{padding-bottom:58px}.service-card>div{padding:22px}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.footer-bottom{flex-direction:column;gap:5px}.archive-head{padding-top:46px}.archive-head h1{font-size:2.45rem}.article-layout{padding-top:38px}.article-main h1{font-size:2.35rem}.article-summary{font-size:1.04rem}.split-copy{padding-block:42px}.submit-grid{padding-bottom:55px}}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}