:root{--red:#d92d20;--red-dark:#9f1f18;--ink:#17202b;--muted:#687386;--line:#e6e9ed;--paper:#fff;--wash:#f5f7f9;--blue:#2f6fed;--shadow:0 12px 36px rgba(27,36,49,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;line-height:1.6}button,input,select{font:inherit}button{cursor:pointer}.topbar{height:72px;max-width:1180px;margin:auto;display:flex;align-items:center;padding:0 24px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:11px;color:var(--ink);text-decoration:none;font-weight:800;font-size:19px}.brand-mark{width:34px;height:34px;border-radius:9px;background:var(--red);color:#fff;display:grid;place-items:center;font-family:serif;font-size:19px}.topbar nav{display:flex;gap:32px;margin-left:70px}.topbar nav a{height:72px;display:flex;align-items:center;color:#596273;text-decoration:none;font-size:14px;position:relative}.topbar nav a:hover,.topbar nav .active{color:var(--red);font-weight:700}.topbar nav .active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--red);border-radius:3px 3px 0 0}.contribute{margin-left:auto;border:0;border-radius:9px;padding:9px 17px;background:var(--ink);color:#fff;font-size:14px}.contribute:hover{background:#303b49}.search-panel{background:linear-gradient(135deg,#fff 0%,#faf8f7 55%,#f7efec 100%);border-bottom:1px solid var(--line);padding:66px 24px 58px;text-align:center}.eyebrow{font-size:12px;letter-spacing:.15em;color:var(--red);font-weight:800}.eyebrow span{display:inline-block;width:22px;height:2px;background:var(--red);vertical-align:middle;margin-right:8px}.search-panel h1{margin:12px 0 4px;font-size:clamp(35px,5vw,54px);letter-spacing:-.04em;line-height:1.25}.search-panel>p{margin:0 auto 28px;color:var(--muted);font-size:16px}.search-box{max-width:680px;height:60px;margin:auto;background:#fff;border:1px solid #dfe3e8;border-radius:13px;box-shadow:var(--shadow);display:flex;align-items:center;padding:0 17px;transition:.2s}.search-box:focus-within{border-color:var(--red);box-shadow:0 0 0 3px rgba(217,45,32,.1),var(--shadow)}.search-box svg{width:22px;fill:none;stroke:#8c96a3;stroke-width:1.8}.search-box input{flex:1;border:0;outline:0;padding:0 13px;font-size:16px;min-width:0}.search-box kbd{background:#f2f4f6;border:1px solid #e1e4e8;border-radius:5px;color:#7b8491;padding:2px 8px;font-size:12px}.quick-links{display:flex;justify-content:center;flex-wrap:wrap;gap:12px;margin-top:17px;font-size:13px;color:#7b8491}.quick-links button{border:0;background:transparent;padding:0;color:#4f5b6b}.quick-links button:hover{color:var(--red)}.workspace{max-width:1180px;margin:0 auto;padding:46px 24px 70px;display:grid;grid-template-columns:210px 1fr;gap:52px}.aside-title{font-size:12px;text-transform:uppercase;letter-spacing:.1em;color:#9098a4;font-weight:800;margin:0 0 12px}.filters{display:grid;gap:5px}.filters button{width:100%;border:0;border-radius:8px;background:transparent;padding:10px 12px;text-align:left;color:#586272;display:grid;grid-template-columns:24px 1fr auto;align-items:center;font-size:14px}.filters button span{font-size:12px;font-weight:800}.filters button b{font-size:12px;color:#9aa1ab}.filters button:hover{background:#f6f7f8}.filters .selected{background:#fff0ee;color:var(--red);font-weight:700}.filters .selected b{color:var(--red)}.tip{margin-top:30px;border:1px solid var(--line);border-radius:12px;padding:17px;background:#fafbfc}.tip span{font-weight:800;font-size:14px}.tip p{font-size:12px;line-height:1.65;color:var(--muted);margin:7px 0 10px}.tip button{border:0;background:transparent;color:var(--red);font-weight:700;font-size:12px;padding:0}.section-head{display:flex;justify-content:space-between;align-items:end;margin-bottom:21px}.section-head h2{margin:0;font-size:22px}.section-head p{margin:3px 0 0;color:var(--muted);font-size:13px}.section-head select{border:1px solid var(--line);border-radius:8px;background:#fff;padding:7px 30px 7px 10px;color:#5f6977;font-size:13px}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.card{border:1px solid var(--line);border-radius:12px;padding:20px;background:#fff;transition:transform .2s,box-shadow .2s,border-color .2s}.card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#d2d7dd}.card-top{display:flex;justify-content:space-between;align-items:start}.type{font-size:11px;padding:3px 8px;border-radius:5px;background:#eef4ff;color:var(--blue);font-weight:700}.type.exam{background:#fff2e9;color:#c05621}.type.guide{background:#edf8f0;color:#287a47}.save{border:0;background:transparent;color:#9aa2ad;font-size:19px;line-height:1}.save.saved{color:var(--red)}.card h3{font-size:17px;margin:13px 0 5px}.card p{color:var(--muted);font-size:13px;margin:0;min-height:42px}.meta{margin-top:18px;padding-top:13px;border-top:1px solid #eff1f3;display:flex;justify-content:space-between;color:#8a939f;font-size:11px}.empty{text-align:center;padding:60px 20px;color:var(--muted);border:1px dashed #ccd2d9;border-radius:12px}.empty strong{color:var(--ink);font-size:18px}.empty p{margin:5px}.guide-strip{max-width:1132px;margin:0 auto 70px;padding:30px 36px;border-radius:16px;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:space-between}.guide-strip span{color:#ff958c;font-size:11px;font-weight:800;letter-spacing:.1em}.guide-strip h2{margin:3px 0;font-size:24px}.guide-strip p{margin:0;color:#b7c0cb;font-size:13px}.guide-strip button{border:1px solid #53606f;border-radius:9px;background:transparent;color:#fff;padding:10px 15px}footer{border-top:1px solid var(--line);padding:24px;display:flex;justify-content:space-between;max-width:1180px;margin:auto;color:#8a939f;font-size:12px}dialog{border:0;border-radius:18px;padding:0;box-shadow:0 30px 80px rgba(0,0,0,.25);max-width:440px;width:calc(100% - 32px)}dialog::backdrop{background:rgba(18,24,31,.55);backdrop-filter:blur(3px)}dialog form{padding:34px;text-align:center}.dialog-close{position:absolute;right:14px;top:10px;border:0;background:transparent;font-size:25px;color:#87909c}.dialog-icon{width:48px;height:48px;border-radius:13px;background:#fff0ee;color:var(--red);display:grid;place-items:center;margin:auto;font-size:25px}.dialog-primary{border:0;border-radius:9px;background:var(--ink);color:#fff;padding:10px 24px}.dialog-primary:hover{background:#303b49}
@media(max-width:760px){.topbar{height:64px}.topbar nav{display:none}.brand{font-size:17px}.search-panel{padding:48px 20px}.search-box{height:56px}.search-box kbd{display:none}.workspace{grid-template-columns:1fr;padding-top:30px;gap:28px}.filters{display:flex;overflow-x:auto;padding-bottom:4px}.filters button{min-width:max-content;grid-template-columns:20px 1fr auto;gap:6px}.tip{display:none}.cards{grid-template-columns:1fr}.guide-strip{margin:0 20px 50px;padding:25px;align-items:start;gap:20px}.guide-strip button{white-space:nowrap}footer{display:grid;gap:5px}.contribute{padding:8px 12px}}
.source-link{color:var(--red);text-decoration:none;font-weight:700}.source-link:hover{text-decoration:underline}
.preview-dialog{width:min(1120px,calc(100% - 24px));max-width:none;height:min(90vh,900px);border-radius:14px;overflow:hidden}.preview-dialog::backdrop{background:rgba(18,24,31,.72)}.preview-shell{height:100%;display:grid;grid-template-rows:58px 1fr;background:#e9edf2}.preview-bar{display:flex;align-items:center;justify-content:space-between;padding:0 18px;background:#fff;border-bottom:1px solid var(--line)}.preview-bar>div{display:flex;align-items:center;gap:14px}.preview-bar a{color:var(--red);font-size:13px;font-weight:700;text-decoration:none}.preview-bar button{border:0;background:transparent;font-size:27px;color:#707987}.preview-dialog iframe{width:100%;height:100%;border:0;background:#525659}
.academic{max-width:1180px;margin:0 auto 70px;padding:0 24px}.academic-head{margin-bottom:22px}.academic-head>span{font-size:11px;letter-spacing:.14em;color:var(--red);font-weight:800}.academic-head h2{font-size:25px;margin:4px 0}.academic-head p{margin:0;color:var(--muted);font-size:14px}.academic-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.academic-grid a{display:block;border:1px solid var(--line);border-radius:12px;padding:19px;text-decoration:none;color:var(--ink);background:#fff;transition:.2s}.academic-grid a:hover{transform:translateY(-2px);border-color:#d7aaa5;box-shadow:var(--shadow)}.academic-grid b{font-size:15px}.academic-grid p{font-size:12px;color:var(--muted);margin:6px 0 15px;min-height:38px}.academic-grid span{font-size:11px;color:var(--red);font-weight:700}
@media(max-width:900px){.academic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:560px){.academic-grid{grid-template-columns:1fr}.academic-grid p{min-height:0}}