/* 51吃瓜 · 瓜讯频谱 */
:root{--bg:#F6F7FB;--paper:#fff;--purple:#5637A7;--deep:#3D287C;--lime:#D7EC74;--slate:#1E293B;--ink:#202B3D;--body:#3D4A5E;--muted:#627085;--line:#DFE4ED;--mint:#E5F3ED;--sky:#E8F2FA;--coral:#FAECE7;--lav:#F0EDF7;--shadow:0 12px 34px #1f2a3d0d}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--body);font:16px/1.75 system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}button,input{font:inherit}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #5637a755;outline-offset:3px}.skip-link{position:absolute;left:-9999px}.skip-link:focus{left:10px;top:10px;z-index:99;background:#fff;padding:10px}.site-header{position:sticky;top:0;z-index:50;background:#fffffff5;border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}.header-inner{max-width:1320px;height:72px;padding:0 30px;margin:auto;display:flex;align-items:center;gap:25px}.brand{display:flex;align-items:center;gap:10px;min-width:165px}.brand-mark{width:38px;height:38px;display:grid;place-items:center;border-radius:12px;background:var(--purple);color:white;font-size:20px;font-weight:900}.brand-copy{display:flex;flex-direction:column;line-height:1.2}.brand-copy strong{font-size:17px;color:var(--slate)}.brand-copy small{font-size:10px;color:var(--muted);letter-spacing:.14em;margin-top:4px}.main-nav{display:flex;align-items:center;justify-content:center;gap:24px;flex:1}.main-nav a{font-size:13px;color:#536074;white-space:nowrap}.main-nav a:hover{color:var(--purple)}.header-actions{display:flex;gap:10px}.search-icon{width:38px;height:38px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;font-size:23px}.menu-toggle{display:none}.mobile-menu{display:none}.channel-strip{background:#fff;border-bottom:1px solid #ebeff5}.channel-strip-inner{max-width:1320px;margin:auto;padding:0 30px;display:flex;gap:7px;overflow-x:auto;scrollbar-width:thin}.channel-chip{height:50px;display:flex;align-items:center;gap:8px;padding:0 12px;white-space:nowrap;border-bottom:3px solid transparent;font-size:12px;color:#59667a}.channel-chip>span{font-size:10px;color:var(--channel);font-weight:850}.channel-chip b{font-weight:650}.channel-chip:hover{background:var(--channel-soft);border-color:var(--channel)}.wrap{max-width:1320px;padding:32px 30px 80px;margin:auto}.hero{display:grid;grid-template-columns:1.62fr 1fr;gap:17px;min-height:400px}.hero-main{position:relative;overflow:hidden;background:#162131;color:#fff;border-radius:22px;padding:35px 42px;display:flex;flex-direction:column;justify-content:center}.hero-main:after{content:"";position:absolute;width:350px;height:350px;right:-80px;top:-100px;border:1px solid #d7ec7433;border-radius:50%;box-shadow:0 0 0 36px #5637a715,0 0 0 76px 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var(--line);color:var(--purple);background:#fff}.hero-foot{position:relative;z-index:1;margin-top:34px;color:#aab5c5;font-size:10px}.hero-stack{display:grid;grid-template-rows:1fr 1fr;gap:16px}.hero-mini{border-radius:17px;padding:22px 25px;display:flex;flex-direction:column;justify-content:center;gap:7px}.hero-mini small{font-size:10px;letter-spacing:.13em;font-weight:850;opacity:.7}.hero-mini b{font-size:19px;line-height:1.4;max-width:90%}.hero-mini span{font-size:12px;line-height:1.6;opacity:.8}.hero-mini{font-size:12px;font-weight:800}.purple{background:var(--lav);color:var(--deep)}.yellow{background:var(--lime);color:#2b381f}.section{margin-top:65px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:22px}.section-head small,.page-intro small,.about-hero>small,.search-hero>small,.feature-hero>small{font-size:10px;letter-spacing:.15em;font-weight:850;color:var(--muted)}.section-head h2,.pathway h2,.stage h2,.city 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1.12fr;gap:16px}.focus-main{background:var(--deep);color:#fff;border-radius:17px;padding:26px;position:relative;overflow:hidden;min-height:300px}.focus-main>small{color:#d7d0eb;font-size:11px}.focus-main>strong{display:block;color:var(--lime);font-size:50px;line-height:1;margin:25px 0}.focus-main h3{font-size:22px;line-height:1.4;color:#fff;margin:8px 0}.focus-main p{font-size:12px;color:#d6d1e7}.focus-list{background:#fff;border:1px solid var(--line);border-radius:17px;padding:9px 20px}.focus-list>a{display:grid;grid-template-columns:1fr 22px;gap:8px;padding:12px 0;border-bottom:1px solid #edf0f5}.focus-list>a:last-child{border:0}.focus-list small{grid-column:1/-1;font-size:10px;color:var(--muted)}.focus-list b{font-size:13px;color:var(--ink)}.focus-list span{color:var(--purple)}.pathway{display:grid;grid-template-columns:235px 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small{font-size:10px;letter-spacing:.15em;font-weight:800}.screen-art b{font-size:64px;margin:8px}.screen-grid>article{align-self:center;padding:10px}.screen-grid>article small{font-size:10px;color:var(--sky)}.screen-grid h3{font-size:20px;line-height:1.4;color:var(--ink);margin:8px 0}.screen-grid p{font-size:12px;color:var(--muted)}.mini-topics{display:flex;flex-direction:column}.mini-topics a{padding:12px 4px;border-bottom:1px solid var(--line);display:flex;flex-direction:column}.mini-topics a:last-child{border:0}.mini-topics small{font-size:10px;color:var(--sky)}.mini-topics b{font-size:12px;color:var(--ink)}.mini-topics span{font-size:10px;color:var(--muted);line-height:1.5}.stage{display:grid;grid-template-columns:1fr 1fr 100px;gap:28px;align-items:center;background:var(--coral);border-radius:18px;padding:24px 28px}.stage-art{height:190px;background:var(--slate);border-radius:13px;display:grid;place-items:center;position:relative;overflow:hidden}.stage-art i{position:absolute;width:160px;height:160px;border:1px solid #d7ec7466;border-radius:50%;box-shadow:0 0 0 30px #ffffff0a,0 0 0 60px #ffffff08}.stage-art b{z-index:1;width:85px;height:85px;border-radius:50%;background:var(--lime);display:grid;place-items:center;text-align:center;color:#2a371e;font-size:14px;line-height:1.2}.stage-art small{position:absolute;bottom:9px;color:#cbd4e0;font-size:9px;letter-spacing:.15em}.stage h2{font-size:28px}.stage>strong{font-size:68px;color:var(--coral);border-left:1px solid #e5c9c1;padding-left:22px}.meme-grid{display:grid;grid-template-columns:repeat(3,1fr) 1.25fr;gap:12px;align-items:stretch}.meme{min-height:175px;border-radius:15px;padding:16px;display:flex;flex-direction:column;justify-content:space-between}.meme small{font-size:10px;font-weight:850;letter-spacing:.14em}.meme b{font-size:25px;line-height:1.2}.meme span{font-size:10px}.meme.lime{background:var(--lime);color:#344321}.meme.lilac{background:var(--lav);color:var(--deep)}.meme.sky{background:var(--sky);color:#315d80}.meme-grid>p{border-left:1px solid var(--line);padding:12px 18px;align-self:center;font-size:13px;color:var(--muted)}.meme-grid>p .more{display:block;margin-top:12px}.people-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;position:relative}.people-row:before{content:"";position:absolute;top:7px;left:7%;right:7%;height:1px;background:#d9d2ea}.people-row>a{position:relative;padding-top:27px;display:flex;flex-direction:column}.people-row>a:before{content:"";position:absolute;top:0;left:0;width:12px;height:12px;border-radius:50%;background:var(--purple);border:3px solid var(--bg)}.people-row small{font-size:10px;color:var(--lavender);font-weight:850}.people-row b{font-size:14px;line-height:1.45;color:var(--ink);margin:7px 0}.people-row span{font-size:11px;color:var(--muted)}.verify{padding:25px 28px;background:var(--mint);border:1px solid #d1e6dc;border-radius:17px}.verify h2{font-size:24px;color:#244b43;margin:7px 0 20px}.verify-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.verify-grid article{padding:13px 15px;background:#ffffffa6;border-left:2px solid #438e7d}.verify-grid b{font-size:11px;color:#2f6c5e}.verify-grid p{font-size:11px;color:#5b756f;margin:5px 0 0}.verify>a{display:inline-block;margin-top:15px;font-size:12px;color:#286c5a;font-weight:850}.city{display:grid;grid-template-columns:.8fr 1.2fr;gap:35px;align-items:center}.city-cards{display:grid;grid-template-columns:1fr 1fr;gap:10px}.city-cards b{padding:17px;border-radius:12px;background:var(--sky);color:#345e7f;font-size:17px}.city-cards b:nth-child(2){grid-row:span 2;background:var(--lav);color:#584b83;display:flex;flex-direction:column;justify-content:center}.city-cards b:nth-child(3){background:var(--lime-soft);color:#43532a}.city-cards 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nav{display:flex;gap:8px;flex-wrap:wrap}.next nav a{padding:9px 12px;background:#ffffffa8;border-radius:8px;color:#344421;font-size:11px;font-weight:800}.site-footer{background:#172235;color:#d5dce7}.footer-inner{max-width:1320px;margin:auto;padding:34px 30px 85px}.footer-brand{display:flex;align-items:center;gap:12px}.footer-brand strong{font-size:14px;color:#fff}.footer-brand p{font-size:11px;color:#aab5c5;margin:3px 0}.footer-links{display:flex;gap:20px;margin:20px 0}.footer-links a{font-size:11px}.copyright{border-top:1px solid #ffffff20;padding-top:14px;color:#9aa7b9;font-size:10px}.mobile-bottom-nav{display:none}
/* secondary layouts */
.inner{padding-top:48px}.page-intro{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:30px}.page-intro h1,.search-hero h1,.about-hero h1{font-size:clamp(36px,4.5vw,55px);line-height:1.16;letter-spacing:-.045em;color:var(--ink);margin:8px 0 10px}.page-intro h1 span{color:var(--purple)}.page-intro p{font-size:14px;color:var(--muted);max-width:650px;margin:0}.page-intro aside{min-width:190px;padding:16px 18px;border-radius:13px;background:var(--lav);display:flex;flex-direction:column}.page-intro aside small{font-size:10px;color:var(--purple);font-weight:850}.page-intro aside b{font-size:20px;color:var(--deep)}.page-intro aside span{font-size:10px;color:#756a91}.two-col{display:grid;grid-template-columns:230px 1fr;gap:23px}.filters{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;align-self:start}.filters>small{font-size:10px;letter-spacing:.14em;color:var(--muted);font-weight:850}.filters h2{font-size:17px;color:var(--ink);margin:5px 0 12px}.filters>a{display:flex;justify-content:space-between;padding:8px 9px;border-radius:7px;font-size:11px;color:#586477}.filters>a:hover,.filters>a.active{background:var(--lav);color:var(--purple);font-weight:800}.filters i{font-style:normal;color:#8792a3}.tip{margin-top:16px;padding:13px;background:var(--lime-soft);border-radius:9px}.tip b{font-size:11px;color:#46552d}.tip p{font-size:10px;color:#68744f}.tip a{font-size:10px;color:#43572b;font-weight:850}.list-head{display:flex;justify-content:space-between;align-items:end;border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:6px}.list-head small{font-size:10px;color:var(--muted);font-weight:850;letter-spacing:.13em}.list-head h2{font-size:21px;color:var(--ink);margin:3px 0}.list-head>span{font-size:10px;color:var(--muted)}.signal-row{position:relative;display:grid;grid-template-columns:42px 1fr 25px;gap:12px;padding:18px 0;border-bottom:1px solid #edf0f5}.signal-index{font-size:10px;color:var(--lavender);font-weight:850}.signal-main .eyebrow{font-size:9px}.signal-main h3{font-size:15px;color:var(--ink);line-height:1.45;margin:5px 0}.signal-main p{font-size:11px;color:var(--muted);margin:0}.signal-arrow{align-self:center;color:var(--purple);font-size:18px}.footnote{background:#eef1f6;border-radius:8px;padding:10px 13px;color:var(--muted);font-size:10px;margin-top:20px}.pagination{display:flex;gap:6px;margin-top:20px;flex-wrap:wrap}.page-link{width:34px;height:34px;border:1px solid var(--line);border-radius:7px;background:#fff;display:grid;place-items:center;font-size:11px}.page-link.is-current{background:var(--purple);color:#fff;border-color:var(--purple)}.orbit,.map-orbit{width:125px;height:125px;border:1px solid #d9d1ea;border-radius:50%;display:grid;place-items:center;text-align:center;color:var(--purple);font-size:34px;font-weight:850;position:relative}.orbit:before,.orbit:after{content:"";position:absolute;inset:12px;border:1px dashed #d9d1ea;border-radius:50%}.orbit:after{inset:-12px}.orbit small{display:block;font-size:8px;letter-spacing:.12em;line-height:1.2}.channel-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.channel-cards>a{min-height:215px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;display:flex;flex-direction:column;transition:.2s}.channel-cards>a>div{display:flex;justify-content:space-between;color:var(--tone);font-size:10px;font-weight:850}.channel-cards>a>div b{font-size:22px}.channel-cards h2{font-size:19px;color:var(--ink);margin:14px 0 5px}.channel-cards p{font-size:11px;color:var(--muted);margin:0}.channel-cards em{font-size:10px;color:var(--tone);font-style:normal;font-weight:850;margin-top:auto;padding-top:15px}.index-section{margin-top:48px}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px}.section-head h2{font-size:24px;color:var(--ink);margin:4px 0}.section-head p{font-size:12px;color:var(--muted);margin:0}.inline-search{display:flex;border:1px solid var(--line);background:#fff;border-radius:8px;overflow:hidden}.inline-search input{width:190px;min-width:0;border:0;padding:9px;font-size:11px}.inline-search button{border:0;background:var(--slate);color:#fff;padding:0 12px;font-size:10px}.pills{display:flex;gap:7px;overflow-x:auto;padding:17px 0 10px}.pills a,.empty nav a{white-space:nowrap;padding:6px 11px;border:1px solid var(--line);border-radius:18px;background:#fff;font-size:10px;color:#59667a}.index-list{background:#fff;border:1px solid var(--line);border-radius:13px;padding:0 18px}.index-list 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p{white-space:normal;font-size:14px;line-height:1.9;color:#3d4a5e;margin:0}.body-section p::first-line{font-weight:750;color:var(--ink)}.source-box{margin-top:22px;padding:16px;background:var(--mint);border-radius:11px}.source-box b{font-size:12px;color:#285b4f}.source-box p{font-size:11px;color:#527168;margin:5px 0}.source-box small{font-size:10px;color:#6a8b80}.discussion{margin-top:28px;padding:21px;background:var(--lav);border-radius:12px}.discussion>small{font-size:10px;color:var(--muted);letter-spacing:.12em;font-weight:850}.discussion h2{font-size:19px;color:var(--ink);margin:4px 0 10px}.discussion li{font-size:12px;padding:4px 0;color:#536078}.topic-bottom{display:flex;justify-content:space-between;margin-top:26px;padding-top:17px;border-top:1px solid var(--line);font-size:11px;color:var(--purple);font-weight:800}.topic-aside{display:flex;flex-direction:column;gap:12px}.topic-aside section{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}.topic-aside 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