:root{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:#1b2436;background:#f7f8fa;font-synthesis:none;color-scheme:light;--blue:#2563eb;--border:#e4e8ee;--muted:#7b8495}
*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button,a,[role=button]{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{opacity:.32;cursor:default}button{color:inherit}svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}button:focus-visible,a:focus-visible,[tabindex]:focus-visible,input:focus-visible{outline:3px solid #93b7ff;outline-offset:3px}[hidden]{display:none!important}.icon-definitions{position:absolute;width:0;height:0;overflow:hidden}.app-header{height:78px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 5vw}.brand{display:flex;align-items:center;gap:12px;color:#202a3c;text-decoration:none;font-weight:650;letter-spacing:-.5px;font-size:20px}.brand-mark{width:36px;height:36px;display:grid;place-items:center;background:var(--blue);color:#fff;border-radius:10px}.brand-mark svg{width:22px;height:22px}.brand-tag{font-size:10px;letter-spacing:1px;font-weight:600;color:#8b94a5;background:#f3f5f8;border:1px solid #e9ecf0;border-radius:5px;padding:3px 5px;margin-left:10px;vertical-align:middle}.button{min-height:40px;border-radius:8px;border:1px solid transparent;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 16px;font-size:13px;font-weight:550;line-height:1.3}.button-primary{background:var(--blue);color:#fff;box-shadow:0 2px 3px #2563eb12}.button-primary:hover{background:#1d4ed8}.button-secondary{background:#f4f6f9;border-color:var(--border)}.button svg{width:17px;height:17px}.welcome{max-width:680px;margin:0 auto;padding:64px 24px 30px;text-align:center}.eyebrow{color:#6f798d;letter-spacing:1.5px;font-size:12px;display:flex;align-items:center;justify-content:center;gap:8px}.status-dot{height:6px;width:6px;background:#7294e4;border-radius:50%}h1{font-size:38px;line-height:1.5;letter-spacing:-1px;font-weight:650;margin:19px 0 12px}.intro{font-size:14px;line-height:1.8;color:#7e8798;margin:0 0 33px}.drop-zone{max-width:484px;margin:auto;min-height:285px;background:#fff;border:1.5px dashed #cbd4e3;border-radius:15px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:28px;cursor:pointer;transition:background .18s,border-color .18s,box-shadow .18s}.drop-zone:hover,.drop-zone:focus-visible{border-color:#6291ee;background:#fcfdff;box-shadow:0 6px 25px #2563eb06}.file-illustration{position:relative;margin-bottom:20px;color:#497ce2}.file-illustration svg{width:47px;height:54px;stroke-width:1.1}.file-illustration span{position:absolute;bottom:11px;left:-5px;font-size:9px;letter-spacing:1px;background:#edf3ff;border:1px solid #dce7fc;padding:3px 6px;border-radius:4px;font-weight:700}.drop-zone strong{font-size:16px;font-weight:550}.drop-subtitle{font-size:12px;color:#8b94a4;margin-top:8px}.drop-button{margin:20px 0 14px;min-width:164px}.file-limit{font-size:11px;color:#a0a8b5;letter-spacing:.3px}.sample-link{font-size:12px;border:0;background:transparent;color:#6c7f9f;padding:17px 10px}.sample-link:hover{color:var(--blue)}.sample-link span{margin-left:7px}.privacy{display:flex;align-items:center;justify-content:center;gap:6px;margin-top:20px;font-size:11px;color:#8a94a4}.privacy svg{width:14px;height:14px}.welcome-features{display:flex;justify-content:center;gap:0;font-size:11px;color:#a2aab6;margin-top:35px}.welcome-features span+span::before{content:"·";margin:0 23px;color:#bec5ce}.reader{display:flex;flex-direction:column;height:calc(100dvh - 78px)}.document-bar{height:58px;flex-shrink:0;display:flex;align-items:center;justify-content:space-between;gap:15px;padding:0 28px;background:#fff;border-bottom:1px solid var(--border)}.document-title{display:flex;gap:10px;align-items:center;min-width:0}.document-title>svg{width:17px;height:17px;color:#6e8bbd}.document-title h1{font-size:13px;font-weight:550;letter-spacing:0;line-height:1.5;margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.toolbar{height:58px;display:flex;align-items:center;gap:16px;padding:0 28px;background:#fff;border-bottom:1px solid var(--border);flex-shrink:0}.toolbar-group{display:flex;align-items:center;gap:9px}.icon-button{width:33px;height:33px;display:inline-flex;align-items:center;justify-content:center;border:1px solid transparent;border-radius:6px;background:transparent;color:#657187;flex-shrink:0}.icon-button:hover:enabled,.text-button:hover:enabled{background:#f0f4fa;color:var(--blue)}.icon-button svg{width:18px;height:18px}.page-controls{font-size:12px;color:#748094}.page-controls input{appearance:textfield;-moz-appearance:textfield;text-align:center;border:1px solid var(--border);border-radius:5px;background:#fff;font-size:12px;color:#26344b;width:44px;height:28px;padding:3px}.page-controls input::-webkit-inner-spin-button,.page-controls input::-webkit-outer-spin-button{appearance:none;margin:0}.page-divider{color:#b1b8c4}.toolbar-separator{width:1px;height:21px;background:var(--border)}.toolbar-spacer{flex:1}.zoom-label{font-size:12px;width:42px;text-align:center;color:#59667d;font-variant-numeric:tabular-nums}.text-button{display:flex;align-items:center;justify-content:center;gap:6px;white-space:nowrap;border:1px solid transparent;background:none;border-radius:6px;padding:7px 9px;min-height:33px;color:#657187;font-size:12px}.text-button svg{width:17px;height:17px}.text-button[aria-pressed=true]{color:var(--blue);background:#edf3ff;border-color:#e0eaff}.viewport{position:relative;flex:1;overflow:auto;padding:30px;background:#edf0f4;overscroll-behavior:contain;min-height:0}.page-container{position:relative;margin:0 auto;background:#fff;box-shadow:0 2px 13px #26344b18}.page-container canvas{display:block}.page-container .textLayer{--total-scale-factor:var(--scale-factor);--user-unit:1;inset:0;opacity:1}.text-view{max-width:820px;min-height:100%;margin:auto;background:#fff;border:1px solid var(--border);border-radius:8px;padding:34px 40px}.text-view-heading{font-size:11px;color:#8490a3;padding-bottom:17px;border-bottom:1px solid #edf0f4;letter-spacing:1px}.text-view p{font-size:15px;line-height:1.95;white-space:pre-wrap;overflow-wrap:anywhere;color:#354158}.text-view .no-text{color:#8a94a4;font-size:13px}.reader-footer{min-height:35px;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:8px 28px;background:#fff;border-top:1px solid var(--border);font-size:10px;color:#8f99a9;flex-shrink:0}.reader-footer span:first-child{color:#6e7e98}.loading{position:fixed;top:90px;left:50%;transform:translateX(-50%);z-index:40;display:flex;align-items:center;gap:10px;max-width:90%;background:#fff;border:1px solid var(--border);box-shadow:0 8px 28px #26344b1a;border-radius:9px;padding:13px 20px;font-size:12px;white-space:nowrap;color:#55657b}.spinner{width:15px;height:15px;border:2px solid #dee8fc;border-top-color:var(--blue);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.message{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);z-index:50;background:#fff7f5;color:#a4482b;border:1px solid #f0d6cb;box-shadow:0 5px 20px #4b252510;border-radius:8px;padding:13px 20px;max-width:calc(100% - 32px);font-size:13px;line-height:1.7}.drop-overlay{position:fixed;inset:12px;z-index:60;border:2px dashed #5b8df4;border-radius:15px;background:#f1f6fff5;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:22px;color:var(--blue);pointer-events:none}.drop-overlay svg{width:44px;height:44px}.drop-overlay strong{font-size:22px;font-weight:550}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}dialog{border:1px solid var(--border);border-radius:12px;box-shadow:0 20px 80px #1b243633;padding:28px;width:min(400px,90vw);color:#26344b}dialog::backdrop{background:#17213855}dialog h2{font-size:18px;margin:0 0 12px}dialog p{font-size:13px;color:#788498;line-height:1.7}dialog label{display:block;font-size:12px;margin:22px 0 8px}dialog input{width:100%;padding:11px;border:1px solid #ced6e2;border-radius:6px}.dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:24px}.noscript{padding:30px;text-align:center}
@media(min-width:1500px){.welcome{padding-top:100px}}@media(max-height:820px) and (min-width:641px){.welcome{padding-top:35px}.welcome h1{font-size:34px}.intro{margin-bottom:22px}.drop-zone{min-height:260px}.privacy{margin-top:12px}.welcome-features{margin-top:25px}}
@media(max-width:640px){.app-header{height:65px;padding:0 18px}.brand{font-size:17px;gap:9px}.brand-mark{height:32px;width:32px}.brand-tag{display:none}.app-header .button{min-height:35px;font-size:12px;padding:8px 11px}.welcome{padding:44px 22px 25px}.welcome h1{font-size:30px;margin-top:19px}.intro{font-size:12px;margin-bottom:28px}.eyebrow{font-size:11px}.drop-zone{min-height:278px;padding:25px 15px}.privacy{font-size:10px;gap:5px;margin-top:21px}.welcome-features{margin-top:32px}.reader{height:calc(100dvh - 65px)}.document-bar{height:47px;padding:0 14px}.toolbar{height:auto;min-height:56px;gap:7px;padding:9px 10px;flex-wrap:wrap}.toolbar-group{gap:1px}.toolbar-separator{margin:0 2px}.page-controls{gap:5px}.toolbar .icon-button{width:28px}.zoom-label{width:37px;font-size:11px}.text-button{padding:7px 5px;gap:3px}.text-button span{font-size:11px}.viewport{padding:17px 12px}.reader-footer{padding:9px 14px;font-size:9px;gap:5px}.keyboard-hint{display:none}.text-view{padding:23px 22px}.text-view p{font-size:14px}.page-controls input{width:36px}.toolbar-spacer{min-width:0}.welcome-features span+span::before{margin:0 17px}}
@media(prefers-reduced-motion:reduce){*{animation-duration:.001ms!important;transition:none!important}}
.header-actions,.document-actions{display:flex;align-items:center;gap:10px}.document-actions{flex-shrink:0;gap:6px}.document-actions a{text-decoration:none}.welcome{padding-top:38px}.welcome h1{font-size:34px}.intro{margin-bottom:24px}.url-form{display:flex;align-items:center;gap:11px;padding:6px 7px 6px 17px;margin:0 auto;max-width:520px;background:#fff;border:1px solid #d7dfea;border-radius:10px;box-shadow:0 3px 14px #26344b04}.url-form:focus-within{border-color:#78a0ef;box-shadow:0 0 0 3px #2563eb0d}.url-form>svg{width:17px;height:17px;color:#8b9ab1}.url-form input{min-width:0;width:100%;flex:1;border:0;outline:0;background:transparent;font-size:13px;color:#354158;padding:10px 0}.url-form input::placeholder{color:#9aa5b5}.url-form .button{flex-shrink:0}.web-sample-link{font-size:11px;padding:13px 4px}.or-divider{display:flex;align-items:center;gap:14px;max-width:484px;margin:11px auto 20px;color:#a0a9b7;font-size:10px}.or-divider::before,.or-divider::after{content:"";height:1px;background:#e5e9f0;flex:1}.welcome .drop-zone{min-height:210px;padding:20px}.welcome .file-illustration{margin-bottom:10px}.welcome .file-illustration svg{width:35px;height:40px}.welcome .file-illustration span{font-size:8px;bottom:6px}.welcome .drop-button{margin:12px 0 10px}.welcome .privacy{margin-top:10px}.welcome-features{margin-top:23px}.web-mode-label{font-size:11px;color:#8b98ab}.web-viewport{background:#f0f2f6}.web-view{--article-scale:1;max-width:890px;min-height:100%;margin:0 auto;padding:44px 58px 65px;background:#fff;border:1px solid #e6eaf0;border-radius:5px;box-shadow:0 2px 12px #26344b05;color:#354158;font-size:calc(16px * var(--article-scale));line-height:1.85;overflow-wrap:anywhere}.web-article-meta{display:flex;align-items:center;gap:15px;color:#95a0b0;font-size:11px;margin-bottom:18px}.web-view>h1{font-size:calc(32px * var(--article-scale));letter-spacing:-.7px;line-height:1.4;font-weight:650;color:#202d42;margin:0 0 30px}.web-content>:first-child{margin-top:0}.web-content h1{font-size:1.8em;letter-spacing:-.5px;line-height:1.45}.web-content h2{font-size:1.4em;font-weight:650;line-height:1.5;margin:2em 0 .8em;color:#25344b}.web-content h3{font-size:1.2em;font-weight:650;line-height:1.55;margin:1.8em 0 .7em;color:#25344b}.web-content h4,.web-content h5,.web-content h6{font-size:1.05em;line-height:1.55;margin:1.5em 0 .6em}.web-content p{margin:.85em 0 1em}.web-content a{color:#356ccd;text-decoration:underline;text-decoration-color:#b9ccef;text-underline-offset:3px}.web-content a:hover{color:#1d4ed8}.web-content img{max-width:100%;height:auto;display:block;margin:1.6em auto}.web-content pre{font-size:.82em;background:#f5f7fb;border:1px solid #e8ecf3;border-radius:7px;padding:20px;overflow-x:auto;white-space:pre;line-height:1.7;overflow-wrap:normal;color:#304564;margin:1.4em 0;tab-size:4}.web-content code{font-family:ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",monospace}.web-content :not(pre)>code{font-size:.86em;background:#f0f3f8;border-radius:4px;padding:.15em .32em}.web-content pre code{font-size:inherit;background:none;padding:0}.web-content blockquote{border-left:3px solid #c5d6f3;margin:1.5em 0;padding:.15em 1.3em;color:#697b97;background:#f9fbff}.web-content figure{margin:1.6em 0}.web-content figcaption{color:#8895a8;text-align:center;font-size:.8em}.web-content table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse;font-size:.88em;margin:1.5em 0}.web-content td,.web-content th{padding:11px 13px;border:1px solid #e3e8f0;text-align:left}.web-content th{background:#f5f7fa}.web-content ul,.web-content ol{padding-left:1.5em}.web-content li{margin:.35em 0}.web-content hr{border:0;border-top:1px solid #e5eaf2;margin:2em 0}.web-content aside{border:1px solid #e4eaf4;border-radius:7px;padding:14px 20px;background:#f9fbfe}.web-viewport .text-view p{font-size:calc(15px * var(--article-scale,1))}.web-content [id]{scroll-margin-top:25px}
@media(max-width:640px){.app-header{padding:0 12px}.brand{font-size:15px;gap:7px}.header-actions{gap:6px}.header-actions .button{gap:5px;font-size:11px;padding:8px}.header-actions .button svg{width:14px;height:14px}.welcome{padding:29px 18px 22px}.welcome h1{font-size:27px}.url-form{padding:5px 5px 5px 11px;gap:7px}.url-form input{font-size:12px}.url-form .button{font-size:12px;padding:10px 11px}.web-sample-link{font-size:10px;line-height:1.6}.welcome .drop-zone{min-height:210px}.welcome .privacy{font-size:9px}.welcome-features{margin-top:22px}.document-actions a span{display:none}.web-mode-label{display:none}.web-view{padding:27px 22px 40px;font-size:calc(15px * var(--article-scale));border-radius:4px}.web-view>h1{font-size:calc(26px * var(--article-scale));margin-bottom:24px}.web-article-meta{font-size:10px;gap:10px;flex-wrap:wrap;margin-bottom:15px}.web-content pre{padding:15px;font-size:.78em}.web-content blockquote{padding:.1em .85em}.web-viewport{padding:15px 10px}.web-content td,.web-content th{padding:8px 10px}}