/* 51吃瓜 — editorial reading system; all layout and typography are local. */
:root{color-scheme:light;--green:#168C78;--green-hover:#107261;--mint:#BFE8D8;--dark:#203B39;--paper:#FAFBF7;--wash:#EDF5EF;--ink:#253330;--muted:#637570;--warm:#B95020;--line:#DBE7DF;--white:#fff;--shadow:0 4px 20px rgba(24,59,51,.045);--radius:8px;--read:760px;--ease:cubic-bezier(.2,.7,.2,1)}
*,*::before,*::after{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;min-width:320px;background:var(--paper);font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;font-size:15px;line-height:1.75;color:var(--ink);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}img{max-width:100%;height:auto;display:block;object-fit:cover}a{color:inherit;text-decoration:none;text-underline-offset:3px}a:hover{color:var(--green)}button{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible{outline:3px solid var(--warm);outline-offset:4px;border-radius:3px}::selection{background:var(--mint);color:var(--dark)}.wrap{width:min(1180px,calc(100% - 56px));margin:0 auto}.skip{position:absolute;top:-100px;left:16px;background:var(--dark);color:white;padding:10px 16px;z-index:100;border-radius:4px}.skip:focus{top:10px;color:white}.site-header{position:relative;z-index:20;background:rgba(250,251,247,.97);border-bottom:1px solid var(--line)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:30px;min-height:84px}.brand{display:flex;align-items:center;gap:11px;flex-shrink:0;white-space:nowrap}.brand img{width:44px;height:44px;object-fit:contain;border-radius:6px}.brand>span{display:flex;flex-direction:column;gap:0}.brand strong{font-weight:830;letter-spacing:-.035em;font-size:26px;line-height:1.35;color:var(--dark)}.brand small{font-size:10px;font-weight:650;letter-spacing:.11em;color:var(--muted);line-height:1.5}.main-nav{display:flex;align-items:center;gap:7px}.main-nav a{display:inline-flex;align-items:center;padding:10px 17px;border-radius:5px;font-size:14px;font-weight:700;color:var(--dark);transition:background .2s,color .2s}.main-nav a:hover{background:var(--wash);color:var(--green)}.nav-toggle{display:none;background:transparent;border:1px solid var(--line);border-radius:5px;padding:8px 12px;font-weight:650;color:var(--dark);cursor:pointer}.nav-toggle span{margin-left:7px}.section-kicker{font-size:12px;letter-spacing:.11em;font-weight:840;color:var(--green);margin:0 0 11px;line-height:1.5}.intro-grid{display:grid;grid-template-columns:minmax(0,.88fr) minmax(0,1.12fr);gap:26px;padding:34px 0 32px;align-items:stretch}.intro-content{background:var(--wash);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(26px,3.5vw,48px);display:flex;flex-direction:column;justify-content:center;position:relative;overflow:hidden}.intro-content::before{position:absolute;content:"";width:9px;height:72px;background:var(--green);left:0;top:50%;transform:translateY(-50%);border-radius:0 4px 4px 0}.intro-content h1{font-size:clamp(29px,3.4vw,45px);line-height:1.36;letter-spacing:-.045em;margin:0;color:var(--dark);font-weight:850}.intro-text{color:#47635C;font-size:15px;max-width:52ch;line-height:1.95;margin:21px 0 27px}.topic-links{display:flex;flex-wrap:wrap;gap:8px}.topic-links a{padding:6px 13px;border:1px solid #BADBD0;border-radius:4px;background:rgba(255,255,255,.67);color:var(--dark);font-size:13px;font-weight:720;transition:background .2s,transform .2s}.topic-links a:hover{background:white;transform:translateY(-1px)}.lead-story{min-height:365px;position:relative;overflow:hidden;border-radius:var(--radius);background:var(--dark)}.lead-story>a{display:block;width:100%;height:100%;min-height:365px;position:relative;color:white}.lead-story img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}.lead-story>a::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.03) 25%,rgba(5,28,22,.88) 100%);pointer-events:none}.lead-story:hover img{transform:scale(1.035)}.lead-caption{position:absolute;z-index:1;left:30px;right:30px;bottom:25px;display:flex;flex-direction:column;align-items:flex-start;gap:10px;color:white}.lead-caption strong{font-size:clamp(21px,2.15vw,29px);font-weight:830;letter-spacing:-.025em;line-height:1.45;max-width:25ch}.lead-caption>span:last-child{font-size:13px;color:#EDF3EE;line-height:1.7;max-width:55ch}.pill{display:inline-block;background:#E4F4E9;color:var(--green);font-weight:800;font-size:11px;letter-spacing:.035em;line-height:1.5;padding:4px 9px;border-radius:3px}.lead-caption .pill{background:var(--warm);color:white;font-size:11px}.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:38px;padding-bottom:70px}.main-column,.side-column{min-width:0}.editorial-section{margin:0 0 40px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:12px;border-bottom:2px solid var(--dark);padding-bottom:13px;margin-bottom:19px}.section-heading .section-kicker{margin-bottom:4px}.section-heading h2,.editorial-section>h2{margin:0;font-size:24px;line-height:1.35;font-weight:850;color:var(--dark);letter-spacing:-.035em}.section-heading .quiet{color:var(--muted);font-size:12px;padding-bottom:3px}.text-link{display:inline-block;color:var(--green);font-size:13px;font-weight:800;white-space:nowrap}.text-link:hover{text-decoration:underline}.story-list{display:grid;grid-template-columns:1fr 1fr;gap:14px 18px}.story-card{display:flex;flex-direction:column;min-width:0;border:1px solid var(--line);border-radius:6px;background:white;overflow:hidden;transition:border-color .2s,box-shadow .2s}.story-card:hover{border-color:#b3d0c2;box-shadow:var(--shadow)}.story-thumb{display:block;aspect-ratio:16/9;overflow:hidden;background:var(--wash);position:relative}.story-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}.story-card:hover .story-thumb img{transform:scale(1.025)}.story-copy{display:flex;flex-direction:column;align-items:flex-start;flex:1;padding:16px 17px 18px}.eyebrow{display:flex;gap:9px;align-items:center;font-size:11px;color:var(--muted);margin:0 0 10px;font-weight:650}.story-copy h3{font-size:18px;line-height:1.45;letter-spacing:-.02em;color:var(--dark);margin:0 0 10px;font-weight:780}.story-copy h3 a:hover{color:var(--green)}.summary{font-size:13px;line-height:1.8;color:var(--muted);margin:0 0 18px}.read-more{font-size:12px;color:var(--green);font-weight:800;margin-top:auto;padding:4px 0}.read-more span{font-size:14px;display:inline-block;transition:transform .2s}.read-more:hover span{transform:translate(2px,-2px)}.report-preview{display:grid;grid-template-columns:1fr 1fr;gap:18px}.report-preview .story-thumb{aspect-ratio:15/9}.report-preview .story-card{border-top:3px solid var(--mint)}.wide-note{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(190px,.75fr);gap:25px;align-items:center;border:1px solid var(--line);background:white;padding:20px;border-radius:6px}.wide-note h3{font-size:20px;line-height:1.45;margin:5px 0 10px;color:var(--dark);font-weight:800}.wide-note p{font-size:13px;line-height:1.9;color:var(--muted);margin:0 0 12px}.wide-note .eyebrow{color:var(--green)}.wide-note img{width:100%;aspect-ratio:4/3;border-radius:4px}.side-column{padding-top:0}.side-panel{padding:21px 20px;background:#fff;border:1px solid var(--line);border-radius:6px;margin-bottom:18px}.side-panel>h2{font-size:19px;color:var(--dark);font-weight:830;margin:0 0 18px;line-height:1.4}.compact-list{padding:0;margin:0;list-style:none;counter-reset:topic}.compact-list li{counter-increment:topic;position:relative;border-top:1px solid #EDF1ED;padding:12px 0 13px 35px;min-width:0}.compact-list li:first-child{border-top:0;padding-top:2px}.compact-list li::before{content:counter(topic,decimal-leading-zero);position:absolute;left:0;top:14px;color:var(--green);font-size:13px;line-height:1.5;font-weight:850;font-variant-numeric:tabular-nums}.compact-list li:first-child::before{top:4px}.compact-list a{display:block;font-size:14px;font-weight:730;line-height:1.55;color:var(--dark)}.compact-list a:hover{color:var(--green)}.compact-list small{display:block;color:var(--muted);font-size:11px;margin-top:4px}.side-panel.mint{background:var(--wash)}.side-panel.mint>p:not(.section-kicker){font-size:13px;line-height:1.95;color:#4D6860;margin:0 0 16px}.site-details{display:grid;grid-template-columns:78px minmax(0,1fr);border-top:1px solid #D0E4D8;gap:10px 4px;padding-top:14px;margin:0;font-size:12px;line-height:1.65}.site-details dt{color:var(--muted)}.site-details dd{margin:0;overflow-wrap:anywhere;font-weight:720}.site-details dd a{color:var(--green)}.site-footer{border-top:1px solid var(--line);background:var(--wash);color:var(--dark)}.footer-inner{display:grid;grid-template-columns:1fr auto;column-gap:30px;row-gap:10px;padding:37px 0 24px}.footer-inner strong{font-size:21px;font-weight:850}.footer-inner>div:first-child p{font-size:12px;color:var(--muted);margin:6px 0}.footer-nav{display:flex;gap:23px;align-items:start;padding-top:8px;font-size:13px;font-weight:750}.fineprint{grid-column:1/-1;font-size:11px;line-height:1.75;color:var(--muted);padding-top:16px;border-top:1px solid #D7E4DC}.inner-main{min-height:70vh;padding-bottom:70px}.breadcrumb{display:flex;gap:10px;align-items:center;padding:24px 0 19px;color:var(--muted);font-size:12px;flex-wrap:wrap}.breadcrumb a{color:var(--green);font-weight:750}.breadcrumb span[aria-hidden]{color:#ADBAB1}.section-hero{background:var(--wash);padding:34px 42px;margin:6px 0 20px;border:1px solid var(--line);border-left:6px solid var(--green);border-radius:5px}.section-hero h1{font-size:clamp(29px,3.5vw,40px);letter-spacing:-.04em;color:var(--dark);line-height:1.35;margin:0 0 15px}.section-hero>p:last-child{max-width:780px;color:#4C635E;font-size:15px;line-height:1.9;margin:0}.reports-intro{display:flex;align-items:center;flex-wrap:wrap;gap:17px;justify-content:space-between;border-bottom:1px solid var(--line);padding:15px 6px 19px;margin-bottom:34px}.reports-intro strong{font-size:14px;color:var(--dark)}.reports-intro>div{display:flex;gap:9px;flex-wrap:wrap}.reports-intro span{color:var(--green);font-size:12px;font-weight:720;background:#EBF7EE;padding:5px 11px;border-radius:3px}.reports-list{grid-template-columns:repeat(3,minmax(0,1fr));gap:19px}.reports-list .story-copy{min-height:260px}.reports-list .story-thumb{aspect-ratio:16/10}.bottom-related{background:white;border:1px solid var(--line);padding:26px 30px;border-radius:5px}.bottom-related h2{font-size:20px;color:var(--dark);margin:0 0 6px}.bottom-related p{font-size:14px;color:var(--muted);line-height:1.85;margin:0}.bottom-related a{color:var(--green);font-weight:750;text-decoration:underline}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 274px;gap:39px;padding-top:7px}.article-detail{min-width:0}.article-heading{padding-bottom:22px;border-bottom:1px solid var(--line)}.article-heading h1{color:var(--dark);font-size:clamp(29px,3.3vw,41px);line-height:1.42;font-weight:850;letter-spacing:-.035em;margin:8px 0 15px}.article-deck{font-size:16px;color:#4B6961;line-height:1.9;margin:0}.article-visual{margin:25px 0 30px}.article-visual img{width:100%;max-height:490px;min-height:270px;aspect-ratio:16/9;border-radius:5px;background:var(--wash)}.article-visual figcaption{text-align:right;font-size:11px;color:var(--muted);margin-top:7px}.article-body{max-width:var(--read);font-size:16px;line-height:2.05;color:#354841}.article-body p{margin:0 0 22px}.article-body .lead-paragraph{color:var(--dark);font-size:18px;line-height:2;font-weight:570;letter-spacing:.005em;border-left:3px solid var(--mint);padding-left:19px;margin:0 0 29px}.article-body section{margin:0 0 32px}.article-body h2{font-size:23px;font-weight:830;letter-spacing:-.025em;line-height:1.5;color:var(--dark);margin:0 0 14px;padding-top:5px}.article-body section p{text-align:justify;text-justify:inter-ideograph}.article-ending{background:var(--wash);border-radius:5px;padding:18px 20px;margin-top:40px}.article-ending p{margin:0;font-size:13px;color:var(--muted)}.article-ending a{color:var(--green);font-weight:780}.article-aside .side-panel{position:sticky;top:15px}.related-list{list-style:none;margin:0;padding:0}.related-list li{padding:13px 0;border-top:1px solid var(--line)}.related-list li:first-child{border-top:0;padding-top:0}.related-list a{font-size:14px;font-weight:760;display:block;color:var(--dark);line-height:1.65}.related-list a:hover{color:var(--green)}.related-list span{color:var(--muted);font-size:11px;display:block;margin-top:4px}.error-layout{text-align:center;padding:95px 0 145px;min-height:65vh}.error-layout h1{font-size:clamp(30px,5vw,46px);color:var(--dark);margin:0 0 8px}.error-layout p{color:var(--muted);margin:10px 0 25px}.button-link{background:var(--green);color:white;padding:10px 18px;border-radius:5px;font-size:14px;font-weight:750;display:inline-block;margin-right:12px}.button-link:hover{background:var(--green-hover);color:white}
/* Distinct content density and readable line lengths across device widths. */
@media(max-width:1140px){.content-grid{grid-template-columns:minmax(0,1fr) 255px;gap:26px}.article-layout{grid-template-columns:minmax(0,1fr) 250px;gap:26px}.story-copy{padding:15px}.lead-story,.lead-story>a{min-height:330px}.intro-grid{gap:19px}.intro-content{padding:30px}.section-heading h2{font-size:22px}.wide-note{gap:17px}.reports-list{gap:14px}.reports-list .story-copy{min-height:280px}}
@media(max-width:920px){.wrap{width:min(100% - 38px,760px)}.header-inner{min-height:75px}.content-grid,.article-layout{grid-template-columns:minmax(0,1fr)}.side-column{display:grid;grid-template-columns:1fr 1fr;gap:15px}.side-panel{margin:0}.article-aside{margin-top:10px}.article-aside .side-panel{position:static}.intro-grid{grid-template-columns:1fr 1fr}.intro-content h1{font-size:30px}.intro-text{font-size:13px;margin:13px 0 20px}.lead-story,.lead-story>a{min-height:360px}.lead-caption{left:20px;right:20px;bottom:18px}.lead-caption strong{font-size:21px}.lead-caption>span:last-child{display:none}.reports-list{grid-template-columns:1fr 1fr}.reports-list .story-copy{min-height:235px}.content-grid{padding-bottom:45px}.footer-inner{padding-top:26px}}
@media(max-width:760px){.wrap{width:calc(100% - 32px)}.header-inner{min-height:68px}.brand img{width:38px;height:38px}.brand strong{font-size:23px}.brand small{font-size:9px;letter-spacing:.065em}.nav-toggle{display:block}.main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--paper);box-shadow:0 9px 18px rgba(20,50,38,.08);border-bottom:1px solid var(--line);padding:9px 16px 14px;flex-direction:column;align-items:stretch;gap:2px}.main-nav.is-open{display:flex}.main-nav a{padding:12px 14px;font-size:15px}.intro-grid{grid-template-columns:1fr;gap:13px;padding:17px 0 27px}.intro-content{min-height:unset;padding:26px 26px 25px 31px}.intro-content h1{font-size:31px;max-width:19ch}.intro-content::before{height:58px;width:5px}.intro-text{font-size:14px;max-width:58ch}.lead-story,.lead-story>a{min-height:305px}.lead-story img{object-position:center}.lead-caption strong{font-size:23px;max-width:32ch}.content-grid{display:block}.side-column{display:grid;grid-template-columns:1fr 1fr;gap:12px}.section-heading{align-items:center}.section-heading h2{font-size:22px}.editorial-section{margin-bottom:33px}.inner-main{padding-bottom:45px}.section-hero{padding:25px;border-left-width:4px}.section-hero h1{font-size:30px}.reports-intro{margin-bottom:25px}.reports-list .story-copy{min-height:230px}.article-layout{padding-top:0}.article-heading h1{font-size:32px}.article-body{font-size:15px}.article-body h2{font-size:21px}.article-body .lead-paragraph{font-size:17px}.article-visual{margin:20px 0 25px}.footer-inner{grid-template-columns:1fr}.footer-nav{flex-wrap:wrap;padding-top:0}.fineprint{margin-top:9px}}
@media(max-width:540px){body{font-size:14px}.brand strong{font-size:22px}.intro-content{padding:23px 23px 23px 25px}.intro-content h1{font-size:29px}.intro-text{line-height:1.8;margin:11px 0 18px}.topic-links{gap:7px}.topic-links a{font-size:12px;padding:6px 10px}.lead-story,.lead-story>a{min-height:255px}.lead-caption{bottom:14px;left:16px;right:16px;gap:7px}.lead-caption strong{font-size:21px}.story-list,.report-preview,.reports-list{display:block}.story-card{display:grid;grid-template-columns:38% minmax(0,1fr);gap:0;margin-bottom:11px}.story-thumb,.report-preview .story-thumb,.reports-list .story-thumb{height:100%;aspect-ratio:auto;min-height:146px}.story-thumb img{width:100%;height:100%;position:absolute;inset:0}.story-copy{padding:12px 12px 12px 14px}.story-copy h3{font-size:16px;line-height:1.45;margin:0 0 6px}.story-copy .summary{font-size:12px;line-height:1.7;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.story-copy .eyebrow{gap:5px;margin-bottom:7px;font-size:10px}.story-copy .pill{padding:2px 6px;font-size:10px}.story-copy .read-more{font-size:11px;padding:0}.reports-list .story-copy{min-height:0}.section-heading h2,.editorial-section>h2{font-size:20px}.section-heading .quiet{display:none}.section-heading{margin-bottom:14px;padding-bottom:10px}.wide-note{grid-template-columns:minmax(0,1fr) 100px;gap:12px;padding:12px}.wide-note img{aspect-ratio:3/4}.wide-note h3{font-size:17px}.wide-note p{font-size:12px;line-height:1.7}.side-column{display:block}.side-panel{margin-bottom:14px;padding:18px}.compact-list{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}.compact-list li:nth-child(2){border-top:0;padding-top:2px}.compact-list li:nth-child(2)::before{top:4px}.compact-list a{font-size:12px}.section-hero{padding:23px 20px}.section-hero h1{font-size:27px}.section-hero>p:last-child{font-size:14px}.reports-intro{gap:8px}.reports-intro>div{gap:6px}.reports-intro span{font-size:11px}.article-heading h1{font-size:28px}.article-deck{font-size:14px}.article-visual img{min-height:200px}.article-body section p{text-align:left}.article-body .lead-paragraph{font-size:16px}.article-body h2{font-size:20px}.breadcrumb{padding:17px 0 12px}.article-ending{margin-top:25px}.footer-nav{gap:16px}}
@media(max-width:390px){.wrap{width:calc(100% - 24px)}.brand img{width:33px;height:33px}.brand strong{font-size:20px}.brand small{font-size:8px}.intro-content h1{font-size:27px}.story-card{grid-template-columns:36% minmax(0,1fr)}.story-copy h3{font-size:15px}.story-copy .summary{-webkit-line-clamp:2}.story-thumb{min-height:135px}.lead-story,.lead-story>a{min-height:225px}.lead-caption strong{font-size:19px}.wide-note{grid-template-columns:1fr}.wide-note img{display:none}.compact-list{display:block}.compact-list li:nth-child(2){border-top:1px solid var(--line);padding-top:12px}.compact-list li:nth-child(2)::before{top:14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}}
@media print{body{background:white;color:black;font-size:12pt}.site-header,.site-footer,.article-aside,.nav-toggle,.topic-links,.side-column,.read-more,.skip{display:none!important}.wrap{width:100%}.article-layout,.content-grid,.intro-grid{display:block}.article-heading h1{font-size:25pt}.article-body{max-width:none}.article-body section{break-inside:avoid}.article-visual img{max-height:320px}.lead-story{display:none}.article-ending{background:white;border-top:1px solid #ccc}}