/* 51吃瓜 · Sky Blue */
:root{--sky:#48BAF1;--sky-soft:#BFEAFF;--sky-pale:#E9F8FF;--navy:#14344F;--navy-deep:#102B42;--action-blue:#116A9B;--action-hover:#0D5278;--paper:#FAFCFE;--paper-white:#fff;--fog:#F2F7FA;--border:#DBEAF2;--title:#173754;--body:#354A59;--muted:#416A80;--coral:#F08B82;--mint:#7BC7B4;--lavender:#AD9CDE;--apricot:#E2B36A}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);font:16px/1.78 system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;color:var(--body);overflow-x:hidden}a{color:var(--action-blue);text-decoration:none}a:hover{text-decoration:underline;color:var(--action-hover)}button,input,textarea{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #e2b36a;outline-offset:3px}.wrap{width:min(100% - 64px,1260px);margin-inline:auto}.narrow{max-width:800px}h1,h2,h3{line-height:1.35;color:var(--title);margin-top:0}h1{font-size:clamp(27px,3vw,39px)}h2{font-size:clamp(21px,2.2vw,27px)}h3{font-size:18px}p{margin:.5em 0 1.2em}.skip{position:absolute;transform:translateY(-200%);background:#fff;padding:10px;z-index:200}.skip:focus{transform:none}.site-header{background:white;border-bottom:1px solid var(--border);position:relative;z-index:10}.header-row{display:flex;min-height:68px;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:10px;font-weight:900;font-size:24px;color:var(--navy);line-height:1.1;white-space:nowrap}.brand small{display:block;font-size:10px;letter-spacing:1.4px;margin-top:5px}.brand-logo{max-width:132px;max-height:42px;object-fit:contain}.main-nav{display:flex;gap:18px;align-items:center}.main-nav a{font-weight:650;color:var(--navy);font-size:14px;white-space:nowrap}.header-actions{display:flex;gap:12px;align-items:center}.menu-trigger,.menu-close,.btn{background:var(--action-blue);color:white;padding:10px 16px;border:0;border-radius:11px;min-height:44px}.btn:hover,.menu-trigger:hover{background:var(--action-hover);color:white;text-decoration:none}.btn-outline{border:1px solid var(--action-blue);background:white;color:var(--action-blue)}.category-rail{background:var(--sky-pale);border-top:1px solid var(--border)}.rail-inner{height:42px;display:flex;align-items:center;gap:26px;overflow-x:auto;white-space:nowrap;scrollbar-width:thin}.rail-inner a{font-size:13px;font-weight:650;color:var(--navy)}.drawer-backdrop{position:fixed;inset:0;background:#0c293c99;z-index:50}.drawer{position:fixed;right:0;top:0;bottom:0;width:min(390px,88vw);overflow-y:auto;z-index:51;padding:22px;background:#fff;box-shadow:-8px 0 35px #18384a33;transform:translateX(105%);transition:transform .2s}.drawer.active{transform:translateX(0)}.drawer-top{display:flex;justify-content:space-between;align-items:center}.drawer h3{font-size:14px;margin:20px 0 7px;border-bottom:1px solid var(--border);padding-bottom:6px}.drawer a{display:inline-block;padding:7px 10px;border-radius:7px;color:var(--navy);font-size:14px}.drawer-open{overflow:hidden}.page{padding-top:32px;padding-bottom:60px}.crumb{font-size:13px;margin:12px 0 26px;color:var(--muted)}.crumb a{color:var(--muted)}.hero{display:grid;grid-template-columns:44% 56%;min-height:350px;align-items:center;border-radius:18px;background:linear-gradient(125deg,#c5edff,#e9f8ff 63%,#fff);overflow:hidden;margin:28px 0 34px}.hero-copy{padding:38px 44px}.hero-copy h1{font-size:clamp(30px,3.5vw,42px)}.hero-copy p{font-size:17px}.hero-media{height:100%;display:grid;place-items:center;min-height:280px;background:linear-gradient(135deg,#a5dff6,#d3f1ff)}.hero-media img{max-width:100%;max-height:380px;object-fit:contain}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}.eyebrow{font-size:12px;letter-spacing:.3px;font-weight:800;color:var(--action-blue);margin:0 0 8px}.home-layout{display:grid;grid-template-columns:170px minmax(0,1fr) 260px;gap:24px}.home-layout>*{min-width:0}.side-panel{border:1px solid var(--border);background:white;border-radius:14px;padding:18px;align-self:start}.side-panel a{display:block;padding:8px 0;border-bottom:1px solid var(--border);font-size:14px}.section{margin:48px 0}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:10px;margin-bottom:20px}.section-heading p{margin:0;color:var(--muted);font-size:14px}.section-heading h2{margin:0}.article-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:19px}.article-card{padding:20px;background:#fff;border:1px solid var(--border);border-radius:13px;min-width:0}.article-card img{max-width:100%;width:100%;height:155px;object-fit:contain;margin-bottom:12px;border-radius:9px;background:var(--sky-pale)}.article-card h3{margin:4px 0 10px}.article-card h3 a{color:var(--title)}.article-card p{font-size:14px}.more{font-size:13px;font-weight:700}.compact-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.featured-panel{background:linear-gradient(120deg,var(--sky-pale),white);border-radius:16px;padding:27px}.topic-pills{display:flex;flex-wrap:wrap;gap:12px}.topic-pills a{background:white;border:1px solid var(--border);padding:10px 15px;border-radius:22px;font-weight:650}.discussion{border:1px solid var(--border);padding:17px 20px;border-radius:13px;background:white;margin:0 0 12px}.discussion h3{font-size:16px;margin:0 0 7px}.discussion p{font-size:14px;margin-bottom:0}.two-col{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:35px}.article-prose{font-size:17px;line-height:1.84;max-width:780px}.article-prose h2{margin-top:34px}.article-prose li{margin-bottom:13px}.meta{font-size:13px;color:var(--muted)}.page-lead{font-size:17px;max-width:760px}.topic-card{background:white;border:1px solid var(--border);border-radius:14px;padding:21px}.topic-card h3{margin-bottom:8px}.topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.form-panel{padding:24px;background:white;border:1px solid var(--border);border-radius:14px;max-width:760px}.form-panel label{display:block;margin:17px 0 7px;font-weight:700}.form-panel input,.form-panel textarea,.form-panel select,.search-form input{width:100%;padding:12px 14px;border:1px solid #aabfcb;border-radius:9px;background:#fff;color:var(--navy)}.form-panel textarea{min-height:160px;resize:vertical}.notice{padding:15px 20px;background:var(--sky-pale);border-left:4px solid var(--action-blue);border-radius:9px}.warn{background:#fff1e7;border-color:#b2681d}.search-form{display:flex;gap:10px;margin:20px 0 30px}.search-form input{flex:1}.pager{display:flex;justify-content:center;gap:9px;margin:28px 0}.pager a{background:#fff;border:1px solid var(--border);padding:6px 14px;border-radius:8px}.pager a[aria-current]{background:var(--navy);color:white}.site-footer{background:var(--navy-deep);color:#f5f9fc;padding:45px 0 20px}.footer-grid{display:grid;grid-template-columns:2fr repeat(5,1fr);gap:24px}.site-footer h2,.site-footer h3{color:#fff;font-size:15px;margin-bottom:12px}.site-footer h2{font-size:24px}.site-footer a{display:block;color:#d8effb;font-size:13px;margin:7px 0}.footer-base{margin-top:36px;border-top:1px solid #3d6680;padding-top:15px;font-size:12px}.footer-base a{display:inline}.mobile-tabs{display:none}.empty{padding:20px;background:var(--sky-pale);border-radius:10px}
@media(max-width:1199px){.home-layout{grid-template-columns:minmax(0,1fr)}.home-layout>.side-panel:first-child{display:flex;flex-wrap:wrap;gap:6px}.home-layout>.side-panel:first-child a{padding:5px 12px;border:0}.main-nav{gap:11px}.main-nav a{font-size:12px}}
@media(max-width:900px){.main-nav{display:none}.article-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.two-col{grid-template-columns:1fr}}
@media(max-width:650px){.wrap{width:calc(100% - 34px)}.header-row{min-height:64px}.brand{font-size:21px}.hero{grid-template-columns:1fr}.hero-copy{padding:28px 22px}.hero-media{min-height:210px}.hero-media img{max-height:260px}.article-grid,.compact-grid,.topic-grid{grid-template-columns:1fr}.section{margin:32px 0}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.page{padding-top:18px;padding-bottom:50px}.mobile-tabs{position:fixed;display:flex;justify-content:space-around;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--border);z-index:20;padding:8px 0 max(9px,env(safe-area-inset-bottom))}.mobile-tabs a{font-size:13px;font-weight:700}.site-footer{padding-bottom:85px}.search-action{display:none}.search-form{flex-wrap:wrap}.search-form button{width:100%}.section-heading{align-items:start}.article-prose{font-size:16px}}
@media(max-width:360px){.brand small{font-size:9px}.menu-trigger{font-size:12px;padding:8px 10px}.header-actions{gap:4px}.hero-copy h1{font-size:27px}}