.login-mode{background:#f7faff;border:1px solid #d9e3ef;border-radius:9px;grid-template-columns:1fr 1fr;margin:24px 0 4px;padding:3px;display:grid}.login-mode button{color:#6d7d91;cursor:pointer;background:0 0;border:0;border-radius:7px;height:36px;font-weight:700}.login-mode button.active{color:#1677ff;background:#fff;box-shadow:0 2px 7px #144a8c1a}.login-helper{color:#1677ff;cursor:pointer;background:0 0;border:0;margin:14px auto 0;font-size:13px;display:block}.password-input{position:relative}.password-input input{box-sizing:border-box;width:100%;padding-right:46px}.password-visibility{color:#8092a8;cursor:pointer;background:0 0;border:0;place-items:center;width:28px;height:28px;padding:0;display:grid;position:absolute;top:50%;right:12px;transform:translateY(-50%)}.password-visibility:hover{color:#1677ff}.form-notice{color:#60708a;background:#f7fbff;border:1px solid #dce8f8;border-radius:10px;gap:6px;margin-bottom:18px;padding:14px 16px;line-height:1.6;display:grid}.form-notice.danger{background:#fff8f7;border-color:#ffd3cf}.form-notice.danger b{color:#d6524a}.auth-status-button{font:inherit;cursor:pointer;background:0 0;border:0;padding:0}.auth-status-button:hover{text-decoration:underline}footer strong{color:#1677ff}footer .footer-slogan{color:#78869a;margin:0 0 0 7px;display:inline}.ranking-card-link{cursor:pointer}.ranking-card .section-title button{display:none}.ranking-tabs{background:#fff;border:1px solid #dce6f1;border-radius:9px;gap:4px;margin:-2px 0 18px;padding:4px;display:inline-flex}.ranking-tabs button{color:#718198;background:0 0;border:0;border-radius:6px;min-width:68px;height:34px;font-weight:700}.ranking-tabs button.active{color:#1677ff;background:#eaf3ff}.ranking-list{background:#fff;border:1px solid #e1e8f2;border-radius:10px;overflow:hidden}.ranking-row{border-bottom:1px solid #edf1f5;align-items:center;gap:14px;min-height:78px;padding:14px 20px;display:flex}.ranking-row:last-child{border-bottom:0}.ranking-row>div{gap:5px;display:grid}.ranking-row>div b{color:#273753}.ranking-row small{color:#8a98aa;font-size:12px;font-weight:400}.ranking-row>strong{color:#1677ff;justify-items:end;margin-left:auto;font-size:20px;display:grid}.preview-action{color:#1677ff;border-color:#9bc1ef}.preview-page{padding:34px 0 65px}.preview-reader{background:#fff;border:1px solid #dce6f2;border-radius:11px;grid-template-columns:176px minmax(0,1fr);min-height:640px;display:grid;overflow:hidden}.preview-sidebar{background:#f8fbff;border-right:1px solid #e5ebf3;padding:15px 12px}.preview-side-title{color:#425b78;align-items:center;gap:7px;padding:2px 5px 13px;font-size:13px;font-weight:700;display:flex}.preview-side-title span{color:#1677ff;margin-left:auto}.preview-thumbnails{gap:11px;max-height:580px;padding:0 4px;display:grid;overflow-y:auto}.preview-thumbnails button{color:#708199;background:#fff;border:1px solid #dfe7f0;border-radius:5px;padding:3px;position:relative}.preview-thumbnails button.active{border-color:#1677ff;box-shadow:0 0 0 2px #e5f0ff}.preview-thumbnails button>span{aspect-ratio:1.42;color:#1b74c8;background:#eaf2fa;place-items:center;font-size:15px;display:grid;overflow:hidden}.preview-thumbnails img{object-fit:cover;width:100%;height:100%}.preview-thumbnails small{padding-top:3px;font-size:11px;display:block}.preview-stage{background:#eff3f8;min-width:0}.preview-toolbar,.preview-pagination{color:#62748b;background:#fff;border-bottom:1px solid #dfe7ef;justify-content:space-between;align-items:center;height:54px;padding:0 18px;font-size:13px;display:flex}.preview-toolbar>div{align-items:center;gap:7px;display:flex}.preview-toolbar button{color:#58708d;background:#fff;border:1px solid #dce5ef;border-radius:5px;place-items:center;width:30px;height:30px;display:grid}.preview-toolbar b{text-align:center;min-width:40px;font-size:12px}.preview-canvas{background:#eaf0f6;justify-content:center;align-items:flex-start;min-height:530px;padding:28px;display:flex;overflow:auto}.preview-canvas>img,.preview-placeholder{max-width:100%;min-height:470px;transition:width .16s;box-shadow:0 5px 20px #334a662e}.preview-placeholder{box-sizing:border-box;color:#2c4664;background:#fff;flex-direction:column;align-items:flex-start;padding:44px 11%;display:flex}.preview-placeholder span{color:#fff;background:#1677ff;border-radius:4px;padding:5px 9px;font-size:12px}.preview-placeholder h2{margin:46px 0 10px;font-size:28px;line-height:1.35}.preview-placeholder p{color:#7c8da2;margin:0 0 38px}.preview-placeholder div{background:#e7eef5;border-radius:8px;width:100%;height:11px;margin:8px 0}.preview-placeholder div:nth-of-type(2){width:84%}.preview-placeholder div:nth-of-type(3){width:67%}.preview-placeholder small{color:#9aa9b9;margin-top:auto}.preview-课件{background:linear-gradient(145deg,#fff 0%,#ecfbfc 100%)}.preview-习题{background:linear-gradient(145deg,#fff 0%,#fff5e6 100%)}.preview-试卷{background:linear-gradient(145deg,#fff 0%,#eef2ff 100%)}.preview-pagination{border-top:1px solid #dfe7ef;border-bottom:0;justify-content:center;gap:20px}.preview-pagination button{color:#2876cb;background:0 0;border:0;align-items:center;gap:4px;font-weight:700;display:flex}.preview-pagination button:disabled{color:#aebdcd}.preview-error{color:#db5959;margin:12px 0 0;font-size:13px}.preview-unavailable{color:#8a9bb0;background:#fff;flex-direction:column;justify-content:center;align-items:center;gap:10px;width:min(620px,100%);min-height:470px;display:flex;box-shadow:0 5px 20px #334a661f}.preview-unavailable b{color:#4c6078}@media (width<=720px){.preview-reader{grid-template-columns:1fr}.preview-sidebar{border-bottom:1px solid #e5ebf3;border-right:0}.preview-thumbnails{max-height:none;display:flex;overflow-x:auto}.preview-thumbnails button{flex:0 0 80px}.preview-canvas{min-height:420px;padding:16px}.preview-placeholder{min-height:390px;padding:30px}.preview-placeholder h2{margin-top:30px;font-size:22px}}.mine-page{padding-bottom:96px}.mine-heading{justify-content:space-between;align-items:flex-start;gap:24px;display:flex}.mine-heading .page-heading{margin-bottom:18px}.mine-heading .outline-button{flex:none;margin-top:6px}.mine-filters{flex-wrap:wrap;gap:10px;margin:0 0 18px;display:flex}.mine-filters button{color:#52708f;cursor:pointer;background:#fff;border:1px solid #dbe6f4;border-radius:6px;min-width:76px;height:34px;padding:0 14px}.mine-filters button.active{color:#176bff;background:#f2f7ff;border-color:#176bff}.mine-list{gap:12px;display:grid}.mine-item{background:#fff;border:1px solid #dce7f3;border-radius:8px;align-items:center;gap:18px;min-height:132px;padding:18px 20px;transition:border-color .2s,box-shadow .2s;display:flex;position:relative}.mine-item:hover{border-color:#b8cff2;box-shadow:0 8px 24px #285b9c14}.mine-check{cursor:pointer;align-items:center;display:flex}.mine-check input{opacity:0;position:absolute}.mine-check span{border:1px solid #aebed2;border-radius:5px;width:19px;height:19px}.mine-check input:checked+span{background:#176bff;border-color:#176bff;box-shadow:inset 0 0 0 4px #fff}.mine-cover{color:#176bff;background:#eaf3ff;border-radius:7px;flex-direction:column;flex:0 0 132px;justify-content:space-between;width:132px;height:94px;padding:10px;display:flex}.mine-cover span{color:#fff;background:#176bff;border-radius:4px;align-self:flex-start;padding:3px 7px;font-size:12px;line-height:1.1}.mine-cover b{text-overflow:ellipsis;white-space:nowrap;font-size:22px;line-height:1.1;overflow:hidden}.mine-cover.课件{color:#168a7d;background:#dff6f4}.mine-cover.习题{color:#d76b16;background:#fff1df}.mine-cover.试卷{color:#7054d5;background:#ece5ff}.mine-info{flex:1;min-width:0}.mine-info>div:first-child{align-items:center;gap:10px;display:flex}.mine-info h2{color:#21344f;text-overflow:ellipsis;white-space:nowrap;margin:0;font-size:17px;line-height:1.35;overflow:hidden}.mine-info p,.mine-info small{color:#71849d;text-overflow:ellipsis;white-space:nowrap;margin:7px 0 0;font-size:13px;line-height:1.45;display:block;overflow:hidden}.mine-status{color:#6f829c;background:#eff3f8;border-radius:999px;flex:none;padding:3px 8px;font-size:12px}.mine-status.approved{color:#0d9a65;background:#e7f8f0}.mine-status.pending{color:#bf7a09;background:#fff5df}.mine-status.rejected{color:#e54a4a;background:#fff0f0}.mine-status.unpublished{color:#697d97;background:#edf1f6}.mine-actions{flex-wrap:wrap;gap:8px;margin-top:11px;display:flex}.mine-actions button,.mine-open{color:#446889;cursor:pointer;background:#fff;border:1px solid #cbdbee;border-radius:5px;justify-content:center;align-items:center;gap:5px;height:30px;padding:0 10px;font-size:13px;display:inline-flex}.mine-actions button:hover{color:#176bff;border-color:#176bff}.mine-actions .mine-delete{color:#df4a4a;border-color:#f1c9c9}.mine-actions .mine-delete:hover{color:#cf3636;border-color:#df4a4a}.mine-open{border:0;width:34px;padding:0}.batch-bar{z-index:8;background:#1f334ff5;border:1px solid #ffffff2e;border-radius:8px;align-items:center;gap:10px;padding:12px 14px;display:flex;position:fixed;bottom:26px;left:50%;transform:translate(-50%);box-shadow:0 14px 34px #0f27483d}.batch-bar span{color:#e8f1ff;white-space:nowrap;padding:0 6px;font-size:14px}.batch-bar span b{color:#75acff}.batch-bar button{color:#1e4875;cursor:pointer;background:#fff;border:0;border-radius:5px;height:34px;padding:0 12px}.batch-bar button:disabled{color:#8090a4;cursor:not-allowed;background:#d8e0ea}.batch-bar button.danger{color:#fff;background:#e65353}.batch-bar button.danger:disabled{color:#8090a4;background:#d8e0ea}@media (width<=680px){.mine-heading{align-items:center}.mine-heading .page-heading{margin-bottom:12px}.mine-heading .page-heading p,.mine-cover{display:none}.mine-item{gap:10px;padding:15px}.mine-actions{gap:6px}.mine-actions button{padding:0 8px}.batch-bar{gap:6px;width:calc(100% - 28px);padding:10px}.batch-bar span{display:none}.batch-bar button{flex:1;padding:0 6px;font-size:12px}}.upload-drafts{gap:14px;margin:24px 0;display:grid}.upload-drafts-heading{color:#253853;justify-content:space-between;align-items:baseline;gap:14px;display:flex}.upload-drafts-heading b{font-size:17px}.upload-drafts-heading span{color:#8190a5;font-size:13px}.upload-draft{background:#fbfdff;border:1px solid #d9e6f4;border-radius:8px;padding:18px}.upload-draft.uploading{background:#f5f9ff;border-color:#8fb8ff}.upload-draft.done{background:#f4fcf7;border-color:#9adbc1}.upload-draft.error{background:#fff9f9;border-color:#f1baba}.upload-draft-top{border-bottom:1px solid #e4edf7;align-items:center;gap:12px;margin-bottom:15px;padding-bottom:14px;display:flex}.upload-draft-top>div:first-child{flex:1;align-items:center;gap:10px;min-width:0;display:flex}.upload-draft-top span{color:#176bff;background:#e9f2ff;border-radius:4px;flex:none;padding:3px 7px;font-size:12px}.upload-draft-top b{color:#334c6b;text-overflow:ellipsis;white-space:nowrap;font-size:14px;overflow:hidden}.draft-state{color:#66819e;flex:none;font-size:13px}.uploading .draft-state{color:#176bff}.done .draft-state{color:#18a066}.error .draft-state{color:#db4a4a}.draft-remove{color:#e15757;cursor:pointer;background:0 0;border:0;flex:none;padding:0;font-size:13px}.upload-draft .form-field{margin-bottom:14px}.upload-draft textarea{min-height:74px}.upload-error{color:#d94747;margin:12px 0 0;font-size:13px}@media (width<=680px){.upload-draft{padding:14px}.upload-draft-top{gap:8px}.upload-drafts-heading{flex-direction:column;align-items:flex-start;gap:4px}.draft-state{display:none}}html,body,#root{min-height:100%}#root{display:flex}.app-shell{flex-direction:column;width:100%;min-height:100vh;display:flex}.app-shell>footer{margin-top:auto}:root{color:#1f2937;font-synthesis:none;background:#f5f7fb;font-family:Microsoft YaHei,PingFang SC,Arial,sans-serif}*{box-sizing:border-box}body{background:#f5f7fb;margin:0}button,input,select{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,select:focus-visible{outline-offset:2px;outline:3px solid #1677ff40}.page-width{width:min(1200px,100% - 40px);margin:0 auto}.utility-bar{color:#7a8799;background:#f1f5fb;height:32px;font-size:12px}.utility-inner{justify-content:space-between;align-items:center;height:100%;display:flex}.main-header{align-items:center;gap:38px;height:82px;display:flex}.site-header{background:#fff;box-shadow:0 1px #e7edf5}.brand{color:#17233d;white-space:nowrap;background:0 0;border:0;align-items:center;gap:10px;font-size:24px;font-weight:800;display:flex}.brand-mark{color:#fff;background:#1677ff;border-radius:12px;place-items:center;width:38px;height:38px;display:grid;box-shadow:0 6px 14px #1677ff3d}.header-search{color:#8b98aa;border:1px solid #d9e2ef;border-radius:8px;flex:1;align-items:center;max-width:510px;height:42px;padding-left:13px;display:flex;overflow:hidden}.header-search input{color:#25344e;border:0;outline:0;flex:1;min-width:0;height:100%;padding:0 10px}.header-search button{color:#fff;background:#1677ff;border:0;align-self:stretch;padding:0 19px;font-size:14px}.header-actions{align-items:center;gap:16px;margin-left:auto;display:flex}.text-action{color:#526178;background:0 0;border:0;align-items:center;gap:6px;display:flex}.avatar-button{color:#1677ff;background:#e7f1ff;border:0;border-radius:50%;place-items:center;width:34px;height:34px;display:grid}.mobile-menu{background:0 0;border:0;display:none}.site-nav{border-top:1px solid #eff3f8;height:49px}.nav-inner{align-items:center;gap:4px;height:100%;display:flex}.site-nav button{color:#526178;background:0 0;border:0;border-bottom:3px solid #0000;align-items:center;gap:3px;height:100%;padding:0 20px;font-size:15px;display:flex}.site-nav button:hover,.site-nav button.active{color:#1677ff;border-bottom-color:#1677ff;font-weight:700}.nav-separator{background:#e0e6ef;width:1px;height:18px;margin:0 8px}.home-page{padding:30px 0 54px}.hero{color:#fff;isolation:isolate;background:linear-gradient(112deg,#1669dc,#1789e9 62%,#42b9ea);border-radius:12px;justify-content:space-between;min-height:302px;padding:42px 62px;display:flex;position:relative;overflow:hidden}.hero:after{content:"";z-index:-1;border:48px solid #ffffff1a;border-radius:50%;width:370px;height:370px;position:absolute;top:-120px;right:-110px}.eyebrow{background:#ffffff26;border:1px solid #ffffff40;border-radius:16px;margin:0 0 12px;padding:5px 12px;font-size:13px;display:inline-block}.hero h1{letter-spacing:1px;margin:0;font-size:38px;line-height:1.26}.hero p:not(.eyebrow){color:#e1efff;margin:15px 0 22px;font-size:16px}.hero-actions{gap:12px;display:flex}.primary-button,.secondary-button{border:0;border-radius:7px;justify-content:center;align-items:center;gap:8px;height:46px;padding:0 21px;font-weight:700;display:inline-flex}.primary-button{color:#fff;background:#1677ff;box-shadow:0 7px 14px #1677ff38}.hero .primary-button{color:#176bd8;box-shadow:none;background:#fff}.secondary-button{color:#fff;background:0 0;border:1px solid #ffffffa6}.hero-sheet{color:#1f3b68;background:#fff;border-radius:10px;align-self:center;width:250px;height:210px;margin:8px 22px 0 40px;padding:25px;transform:rotate(4deg);box-shadow:0 18px 35px #0a3c853b}.sheet-tab{color:#fff;background:#19a98b;border-radius:5px;padding:4px 7px;font-size:12px}.sheet-lines{margin:24px 0 18px}.sheet-lines b{margin-bottom:14px;font-size:21px;display:block}.sheet-lines i{background:#eaf1fa;border-radius:4px;height:7px;margin:7px 0;display:block}.sheet-lines i:nth-child(2){width:72%}.sheet-lines i:nth-child(3){width:92%}.sheet-tags{flex-wrap:wrap;gap:6px;display:flex}.sheet-tags span{color:#3974c9;background:#eaf3ff;border-radius:4px;padding:4px 7px;font-size:11px}.search-panel{background:#fff;border:1px solid #e4ebf4;border-radius:10px;margin-top:-23px;padding:20px 32px 15px;position:relative;box-shadow:0 8px 24px #19416f1a}.search-panel h2{text-align:center;margin:0 0 15px;font-size:20px}.large-search{color:#8a98aa;border:1px solid #d9e2ef;border-radius:7px;align-items:center;max-width:780px;height:52px;margin:auto;padding-left:16px;display:flex}.large-search input{border:0;outline:0;flex:1;height:100%;padding:0 12px;font-size:15px}.large-search button{color:#fff;background:#1677ff;border:0;height:100%;padding:0 29px;font-weight:700}.quick-tags{justify-content:center;gap:9px;margin-top:12px;display:flex}.quick-tags button{color:#6d7c92;background:#f3f7fc;border:0;border-radius:14px;padding:4px 11px;font-size:12px}.feature-row{grid-template-columns:repeat(3,1fr);gap:16px;margin:22px 0;display:grid}.feature-card{background:#fff;border:1px solid #e1e8f2;border-radius:9px;align-items:center;gap:14px;padding:19px;display:flex}.feature-icon{color:#1677ff;background:#eaf3ff;border-radius:50%;flex:none;place-items:center;width:44px;height:44px;display:grid}.feature-card:nth-child(2) .feature-icon{color:#19a98b;background:#e8f8f2}.feature-card:nth-child(3) .feature-icon{color:#7d61e8;background:#f0edff}.feature-card h3{margin:0 0 6px;font-size:17px}.feature-card p{color:#77859a;margin:0;font-size:13px;line-height:1.55}.content-grid{grid-template-columns:minmax(0,1fr) 320px;gap:20px;display:grid}.resource-section,.ranking-card{background:#fff;border:1px solid #e1e8f2;border-radius:9px;padding:20px}.section-title{justify-content:space-between;align-items:flex-start;height:30px;margin-bottom:14px;display:flex}.section-title h2{color:#17233d;margin:0;font-size:20px}.section-title button{color:#7a8798;background:0 0;border:0;align-items:center;font-size:13px;display:flex}.resource-grid{grid-template-columns:repeat(4,1fr);gap:14px;display:grid}.resource-card{background:#fff;border:1px solid #e1e8f2;border-radius:7px;min-width:0;transition:transform .18s,box-shadow .18s;overflow:hidden}.resource-card:hover{transform:translateY(-3px);box-shadow:0 10px 24px #1c3b5f1c}.resource-cover{background:#e8f1ed;height:123px;padding:10px;position:relative;overflow:hidden}.resource-cover:after{content:"";border:16px solid #ffffff94;border-radius:50%;width:120px;height:120px;position:absolute;bottom:-63px;right:-48px}.resource-cover.circle{background:linear-gradient(135deg,#e2f8f8,#a1dde1)}.resource-cover.english{background:linear-gradient(135deg,#fff1df,#ffe1bd)}.resource-cover.physics{background:linear-gradient(135deg,#edf1ff,#c8d8ff)}.resource-type{z-index:1;color:#fff;background:#1677ff;border-radius:4px;padding:3px 7px;font-size:11px;font-weight:700;position:absolute;top:8px;left:8px}.resource-type.课件{background:#19a98b}.resource-type.习题{background:#f18c33}.resource-type.试卷{background:#7d61e8}.cover-copy{z-index:1;color:#365c58;font-size:18px;font-weight:800;line-height:1.25;position:absolute;bottom:16px;left:16px}.circle .cover-copy{color:#24727b}.english .cover-copy{color:#b2601c}.physics .cover-copy{color:#4d65a1}.cover-copy strong{margin-top:5px;font-size:12px;font-weight:500;display:block}.resource-card h3{white-space:nowrap;text-overflow:ellipsis;margin:11px 11px 5px;font-size:14px;line-height:1.45;overflow:hidden}.resource-card p{color:#8190a4;margin:0 11px;font-size:11px}.resource-card p i{border-left:1px solid #ccd5e1;height:11px;margin:0 6px -2px;display:inline-block}.card-meta{color:#8a98aa;justify-content:space-between;margin:13px 11px 11px;font-size:11px;display:flex}.card-meta span{color:#397de2}.ranking-card ol{margin:0;padding:0;list-style:none}.ranking-card li{border-bottom:1px solid #edf1f6;align-items:center;gap:9px;height:46px;font-size:13px;display:flex}.ranking-card li:last-child{border:0}.rank{color:#a5afbb;text-align:center;width:16px;font-weight:800}.rank-1{color:#f4b534}.rank-2{color:#94a5b6}.rank-3{color:#c7864e}.rank-avatar{color:#3577d8;background:#e4efff;border-radius:50%;place-items:center;width:28px;height:28px;font-size:12px;display:grid}.ranking-card li:nth-child(2) .rank-avatar{color:#7d61e8;background:#f0eaff}.ranking-card li:nth-child(3) .rank-avatar{color:#159478;background:#e3f8f2}.ranking-card li b{font-size:13px}.ranking-card li>span:last-child{color:#7f8ba0;margin-left:auto;font-size:11px}.ranking-card strong{color:#19a98b}.library-page,.simple-page{padding:28px 0 60px}.breadcrumb{color:#8490a1;align-items:center;gap:4px;margin-bottom:17px;font-size:13px;display:flex}.library-layout{grid-template-columns:230px 1fr;gap:20px;display:grid}.filter-card,.library-results,.form-card,.profile-card,.profile-placeholder{background:#fff;border:1px solid #e1e8f2;border-radius:10px}.filter-card{padding:19px}.filter-card>h2{align-items:center;gap:8px;margin:0 0 18px;font-size:18px;display:flex}.filter-group{border-top:1px solid #edf1f6;padding:13px 0}.filter-group h3{margin:0 0 10px;font-size:14px}.filter-group div{flex-wrap:wrap;gap:7px;display:flex}.filter-group button{color:#617087;background:#fff;border:1px solid #e0e7f0;border-radius:4px;padding:5px 8px;font-size:12px}.filter-group button.selected{color:#1677ff;background:#eef6ff;border-color:#1677ff}.library-results{padding:24px}.library-results>h1{margin:0 0 6px;font-size:22px}.library-results>p{color:#8793a5;margin:0 0 20px;font-size:13px}.results-list{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}.form-card{text-align:center;max-width:700px;margin:auto;padding:42px}.form-icon{color:#1677ff;background:#eaf3ff;border-radius:18px;place-items:center;width:58px;height:58px;margin:auto;display:grid}.form-card h1{margin:18px 0 6px;font-size:26px}.form-card>p{color:#8090a7;margin:0 0 22px}.upload-drop{color:#4b85c9;background:#f7fbff;border:1px dashed #9cc5ef;border-radius:9px;flex-direction:column;justify-content:center;align-items:center;gap:8px;width:100%;min-height:150px;display:flex}.upload-drop b{color:#2e4c76}.upload-drop span{color:#8b9bb0;font-size:12px}.form-row{text-align:left;grid-template-columns:1fr 1fr;gap:15px;margin:21px 0;display:grid}.form-row label{color:#53627a;gap:7px;font-size:13px;display:grid}.form-row input,.form-row select{color:#4b5c75;background:#fff;border:1px solid #dce4ef;border-radius:6px;height:42px;padding:0 11px}.profile-card{align-items:center;gap:18px;padding:30px 35px;display:flex}.profile-avatar{color:#1677ff;background:#eaf3ff;border-radius:20px;place-items:center;width:70px;height:70px;font-size:30px;font-weight:800;display:grid}.profile-card p{color:#8694a7;margin:0 0 4px;font-size:13px}.profile-card h1{margin:0 0 6px;font-size:23px}.profile-card span{color:#7f8ca0;font-size:13px}.profile-card .primary-button{margin-left:auto}.profile-placeholder{text-align:center;color:#8391a5;margin-top:18px;padding:70px}.profile-placeholder svg{color:#69a7f0}.profile-placeholder h2{color:#2d405c;margin:14px 0 8px;font-size:19px}.profile-placeholder p{margin:0;font-size:14px}footer{text-align:center;color:#78869a;background:#fff;border-top:1px solid #e2e9f2;padding:24px;font-size:13px}footer span{color:#a0adbd;margin-left:20px}@media (width<=900px){.header-search{display:none}.main-header{height:68px}.site-nav button{padding:0 10px}.hero{padding:35px}.hero-sheet{display:none}.resource-grid{grid-template-columns:repeat(2,1fr)}.content-grid{grid-template-columns:1fr}.ranking-card{display:none}.feature-row,.library-layout{grid-template-columns:1fr}.filter-card{display:none}.results-list{grid-template-columns:repeat(2,1fr)}}@media (width<=600px){.page-width{width:min(100% - 28px,1200px)}.utility-bar{display:none}.main-header{gap:12px}.brand{font-size:20px}.brand-mark{width:34px;height:34px}.header-actions{display:none}.mobile-menu{margin-left:auto;display:block}.site-nav{height:auto;display:none}.site-nav.open{display:block}.nav-inner{flex-wrap:wrap;height:auto;padding:8px 0}.site-nav button{height:38px}.nav-separator{display:none}.home-page{padding-top:15px}.hero{min-height:280px;padding:30px 24px}.hero h1{font-size:30px}.hero p:not(.eyebrow){font-size:14px}.hero-actions{flex-wrap:wrap}.search-panel{margin-top:15px;padding:18px 15px}.quick-tags{display:none}.large-search button{padding:0 17px}.content-grid{display:block}.resource-section{padding:15px}.resource-grid{gap:10px}.resource-cover{height:105px}.resource-card h3{font-size:13px}.form-card{padding:30px 20px}.form-row{grid-template-columns:1fr}.profile-card{flex-wrap:wrap;padding:23px}.profile-card .primary-button{width:100%;margin:5px 0 0}.profile-placeholder{padding:45px 20px}.results-list{grid-template-columns:1fr}.library-results{padding:17px}footer span{margin:8px 0 0;display:block}}.toast{z-index:30;color:#b42318;background:#fff4f4;border:1px solid #ffd1d1;border-radius:8px;align-items:center;gap:10px;max-width:min(620px,100% - 32px);padding:12px 14px;font-size:14px;display:flex;position:fixed;top:18px;left:50%;transform:translate(-50%);box-shadow:0 12px 32px #4217172e}.toast button{color:inherit;background:0 0;border:0;place-items:center;display:grid}.page-back{padding-top:20px}.page-back button{color:#60718a;background:0 0;border:0;align-items:center;gap:7px;padding:0;font-size:14px;display:inline-flex}.page-back button:hover{color:#1677ff}.library-heading{justify-content:space-between;align-items:start;gap:16px;display:flex}.small-search{color:#8a98aa;border:1px solid #dce5ef;border-radius:6px;align-items:center;width:210px;height:38px;padding:0 10px;display:flex}.small-search input{border:0;outline:0;width:100%;padding-left:7px}.empty-state{color:#8796aa;text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:8px;min-height:170px;display:flex}.empty-state p{margin:0}.detail-page{padding:27px 0 60px}.back-link{color:#64748b;background:0 0;border:0;align-items:center;gap:7px;margin:0 0 15px;padding:0;display:flex}.detail-card,.reviews-card{background:#fff;border:1px solid #e1e8f2;border-radius:10px}.detail-card{grid-template-columns:260px 1fr;gap:29px;padding:26px;display:grid}.detail-cover{color:#365c58;background:linear-gradient(135deg,#e7f2ec,#bcd8ce);border-radius:8px;min-height:220px;padding:16px;position:relative}.detail-cover.课件{color:#24727b;background:linear-gradient(135deg,#e2f8f8,#a1dde1)}.detail-cover.习题{color:#b2601c;background:linear-gradient(135deg,#fff1df,#ffe1bd)}.detail-cover.试卷{color:#4d65a1;background:linear-gradient(135deg,#edf1ff,#c8d8ff)}.detail-cover span{color:#fff;background:#1677ff;border-radius:4px;padding:4px 8px;font-size:12px;display:inline-block}.detail-cover b{font-size:30px;position:absolute;bottom:24px;left:23px}.detail-title-row{justify-content:space-between;gap:15px;display:flex}.detail-info h1{color:#17233d;margin:0 0 15px;font-size:26px}.report-link{color:#e05a5a;background:0 0;border:0;align-self:start;align-items:center;gap:5px;display:flex}.resource-pills{flex-wrap:wrap;gap:7px;display:flex}.resource-pills span{color:#67809e;background:#eff5fb;border-radius:14px;padding:4px 9px;font-size:12px}.detail-info>p{color:#64748b;line-height:1.7}.detail-meta{color:#8190a4;font-size:13px}.detail-actions{flex-wrap:wrap;gap:10px;margin:22px 0 11px;display:flex}.outline-button{color:#45617f;background:#fff;border:1px solid #cbd8e7;border-radius:7px;justify-content:center;align-items:center;gap:7px;height:46px;padding:0 17px;font-weight:700;display:inline-flex}.point-hint{color:#7a90a9!important;margin:0!important;font-size:12px!important}.reviews-card{margin-top:18px;padding:22px}.review-item{border-top:1px solid #eef2f7;gap:11px;padding:16px 0;display:flex}.review-avatar{color:#1677ff;background:#eaf3ff;border-radius:50%;place-items:center;width:34px;height:34px;font-weight:700;display:grid}.review-item b{font-size:14px}.review-item time{color:#95a2b2;margin-left:10px;font-size:12px}.review-item p{color:#586a82;margin:7px 0 0;font-size:14px;line-height:1.6}.modal-mask{z-index:20;background:#13223675;place-items:center;padding:20px;display:grid;position:fixed;inset:0}.modal{background:#fff;border-radius:12px;width:min(460px,100%);padding:21px;box-shadow:0 22px 60px #0416313d}.modal-head{justify-content:space-between;align-items:center;margin-bottom:14px;display:flex}.modal-head h2{margin:0;font-size:19px}.modal-head button{color:#718096;background:0 0;border:0}.modal textarea,.form-field textarea{resize:vertical;border:1px solid #d9e3ef;border-radius:7px;outline:0;width:100%;padding:11px;line-height:1.5}.modal-tip{color:#718096;margin-top:0;font-size:13px}.reason-grid{grid-template-columns:1fr 1fr;gap:9px;margin:15px 0;display:grid}.reason-grid button{color:#65758b;background:#fff;border:1px solid #e3e9f1;border-radius:6px;padding:9px}.reason-grid button.selected{color:#d33e3e;background:#fff6f6;border-color:#e05252}.danger-button{color:#fff;background:#ee4d4d;border:0;border-radius:7px;height:46px;font-weight:700}.full-button{width:100%;margin-top:16px}.form-page,.record-page,.contact-page,.login-page{padding:34px 0 65px}.page-heading{margin-bottom:20px}.page-heading h1{color:#17233d;margin:0 0 7px;font-size:27px}.page-heading p{color:#7a8aa0;margin:0;font-size:14px}.form-card{text-align:left}.form-card>.primary-button{margin-top:20px}.upload-drop{text-align:center;cursor:pointer;position:relative}.upload-drop input,.file-line input{opacity:0;cursor:pointer;position:absolute;inset:0}.form-field{text-align:left;gap:8px;margin:17px 0;display:grid}.form-field>span{color:#43566f;font-size:14px;font-weight:700}.form-field input,.form-field select{color:#4b5c75;background:#fff;border:1px solid #dce4ef;border-radius:6px;outline:0;height:43px;padding:0 11px}.form-grid{grid-template-columns:1fr 1fr;gap:0 15px;display:grid}.check-row{color:#64748b;cursor:pointer;align-items:center;gap:8px;margin-top:12px;font-size:13px;display:flex}.check-row input{accent-color:#1677ff;width:16px;height:16px}.check-row span{color:#95a3b4;font-size:12px}.profile-card.clickable{cursor:pointer}.profile-avatar img{object-fit:cover;border-radius:inherit;width:100%;height:100%;display:block}.profile-arrow{color:#97a6b7;margin-left:auto}.auth-status{font-weight:700}.auth-status.approved{color:#12a574}.auth-status.pending{color:#d88c11}.auth-status.rejected{color:#ed6666}.stat-grid{grid-template-columns:repeat(4,1fr);gap:14px;margin:17px 0;display:grid}.stat-grid button{color:#65748a;background:#fff;border:1px solid #e1e8f2;border-radius:9px;justify-items:center;gap:5px;padding:17px 10px;display:grid}.stat-grid span{color:#1677ff;background:#eaf3ff;border-radius:10px;place-items:center;width:34px;height:34px;display:grid}.stat-grid b{color:#1b70db;font-size:21px}.stat-grid small{font-size:12px}.account-links{background:#fff;border:1px solid #e1e8f2;border-radius:9px;overflow:hidden}.account-links button{color:#40546d;text-align:left;background:#fff;border:0;border-bottom:1px solid #edf1f5;justify-content:space-between;align-items:center;width:100%;height:54px;padding:0 17px;display:flex}.account-links button:last-child{border-bottom:0}.login-page{place-items:center;min-height:620px;display:grid}.login-card{text-align:center;background:#fff;border:1px solid #e1e8f2;border-radius:14px;width:min(440px,100%);padding:38px;box-shadow:0 15px 42px #2e53811f}.login-mark{color:#2476ef;background:linear-gradient(135deg,#e8f1ff,#e6f8f2);border-radius:18px;place-items:center;width:58px;height:58px;margin:auto;font-size:28px;font-weight:800;display:grid}.login-card h1{margin:18px 0 8px;font-size:24px}.login-card p{color:#718096;font-size:14px;line-height:1.6}.login-card label{text-align:left;color:#475a73;gap:7px;margin-top:20px;font-size:13px;font-weight:700;display:grid}.login-card input{border:1px solid #d9e3ef;border-radius:9px;outline:0;height:46px;padding:0 12px}.login-note{margin-top:16px;font-size:12px!important}.account-id{color:#66768d;border-bottom:1px solid #eaf0f5;justify-content:space-between;padding:13px 0;font-size:14px;display:flex}.account-id b{color:#1677ff}.profile-form{margin-bottom:17px}.phone-card{background:#fff;border:1px solid #e1e8f2;border-radius:10px;justify-content:space-between;align-items:center;gap:20px;padding:21px;display:flex}.phone-card>div:first-child{align-items:center;gap:12px;display:flex}.phone-card svg{color:#1677ff}.phone-card h2{margin:0 0 5px;font-size:17px}.phone-card p{color:#7b8ba1;margin:0;font-size:13px}.phone-input{gap:9px;display:flex}.phone-input input{border:1px solid #dce4ef;border-radius:6px;outline:0;height:42px;padding:0 10px}.logout-button{color:#ed5959;background:#fff;border:1px solid #ffc9c9;border-radius:7px;width:170px;height:44px;margin-top:20px;font-weight:700}.file-line{color:#4777af;cursor:pointer;background:#f7fbff;border:1px dashed #9bbfe7;border-radius:7px;align-items:center;gap:10px;min-height:57px;margin:18px 0;padding:0 15px;display:flex;position:relative}.record-list{grid-template-columns:repeat(4,1fr);gap:16px;display:grid}.points-total{color:#fff;background:#1677ff;border-radius:10px;align-items:center;gap:10px;padding:25px;display:flex}.points-total b{font-size:34px}.points-total span{opacity:.9;font-size:14px}.points-total button{color:#fff;background:#ffffff29;border:1px solid #fff6;border-radius:6px;align-items:center;margin-left:auto;padding:8px 10px;display:flex}.points-list{background:#fff;border:1px solid #e1e8f2;border-radius:10px;margin-top:17px;padding:0 20px}.points-list>div{border-bottom:1px solid #edf1f5;align-items:center;gap:12px;height:71px;display:flex}.points-list>div:last-child{border:0}.point-icon{color:#1677ff;background:#eaf3ff;border-radius:10px;place-items:center;width:34px;height:34px;font-weight:700;display:grid}.points-list p{gap:3px;margin:0;display:grid}.points-list p b{font-size:14px}.points-list p small{color:#91a0b2;font-size:12px}.points-list strong{color:#18a17d;margin-left:auto}.rule-list{gap:13px;display:grid}.rule-card{background:#fff;border:1px solid #e1e8f2;border-radius:10px;align-items:start;gap:14px;padding:22px;display:flex}.rule-card>span{color:#1677ff;background:#eaf3ff;border-radius:12px;place-items:center;width:42px;height:42px;font-weight:700;display:grid}.rule-card h2{margin:0 0 6px;font-size:17px}.rule-card b{color:#1677ff;font-size:14px}.rule-card p{color:#718096;margin:7px 0 0;font-size:13px}.contact-card{text-align:center;background:#fff;border:1px solid #e1e8f2;border-radius:12px;max-width:480px;margin:auto;padding:30px}.contact-card h2{margin:0 0 6px}.contact-card p{color:#77869b;margin:0 0 20px}.contact-card img{border-radius:8px;max-width:100%;max-height:480px;margin:0 auto 17px;display:block}.contact-card a{color:#1677ff;text-decoration:none}.qr-placeholder{color:#8a9ab0;background:#f4f8fc;border-radius:8px;flex-direction:column;justify-content:center;align-items:center;gap:8px;min-height:250px;display:flex}.qr-placeholder b{color:#536981}.centered-button{margin:0 auto;display:block}@media (width<=900px){.detail-card{grid-template-columns:1fr}.detail-cover{min-height:140px}.record-list{grid-template-columns:repeat(2,1fr)}}@media (width<=600px){.library-heading{display:block}.small-search{width:100%;margin-top:13px}.detail-card{padding:17px}.detail-info h1{font-size:21px}.detail-actions>*{flex:1}.form-grid{grid-template-columns:1fr}.stat-grid{grid-template-columns:repeat(2,1fr)}.phone-card{flex-direction:column;align-items:stretch}.phone-input{flex-direction:column}.record-list{grid-template-columns:1fr}.points-total{flex-wrap:wrap}.points-total button{margin-left:0}.login-card{padding:28px 21px}.modal{padding:18px}.reason-grid{grid-template-columns:1fr}.profile-arrow{display:none}}