:root{--paper:#f3f1e8;--surface:#fffdf7;--surface-strong:#fff;--ink:#18231d;--muted:#68736c;--line:#d9ddd4;--line-strong:#bfc8bf;--accent:#1f6a4a;--accent-dark:#164f38;--accent-soft:#dcebdd;--accent-bright:#bfe59b;--danger:#b44732;--warning:#91651f;--shadow:0 24px 70px #1c2d2314;--radius-lg:30px;--radius-md:18px;--radius-sm:12px}.theme-video{--accent:#6b45b5;--accent-dark:#4c2b91;--accent-soft:#e9e0f5;--accent-bright:#dfc8ff}*{box-sizing:border-box}html{background:var(--paper);color:var(--ink);scroll-behavior:smooth}body{background:radial-gradient(circle at 8% 5%, #ffffffeb, transparent 27rem), linear-gradient(180deg, #ffffff1f, transparent 48rem), var(--paper);min-height:100vh;color:var(--ink);text-rendering:optimizelegibility;margin:0;font-family:Inter,SF Pro Display,PingFang SC,Microsoft YaHei,system-ui,sans-serif}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid color-mix(in srgb, var(--accent) 34%, transparent);outline-offset:3px}button:disabled{cursor:not-allowed}.app-shell{min-height:100vh;padding:0 28px}.site-header{border-bottom:1px solid #18231d1a;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;width:min(1180px,100%);min-height:86px;margin:0 auto;display:grid}.brand{color:var(--ink);letter-spacing:-.02em;align-items:center;gap:11px;width:fit-content;font-size:15px;font-weight:800;text-decoration:none;display:inline-flex}.brand-mark{border:1px solid var(--ink);border-radius:50%;justify-content:center;align-items:center;gap:3px;width:34px;height:34px;display:inline-flex;transform:rotate(-8deg)}.brand-mark span{background:var(--ink);border-radius:999px;width:5px}.brand-mark span:first-child{height:15px}.brand-mark span:last-child{height:9px}.tool-nav{background:#fffdf7b8;border:1px solid #18231d1a;border-radius:999px;align-items:center;gap:4px;padding:5px;display:inline-flex;box-shadow:0 4px 20px #1c2d2309}.tool-nav a{min-height:40px;color:var(--muted);border-radius:999px;align-items:center;gap:8px;padding:0 17px;font-size:13px;font-weight:700;text-decoration:none;transition:color .16s,background .16s,transform .16s;display:inline-flex}.tool-nav a:hover{color:var(--ink)}.tool-nav a.active{background:var(--ink);color:#fff}.tool-nav a:active{transform:scale(.98)}.nav-index{opacity:.55;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:10px}.privacy-pill{color:var(--muted);letter-spacing:.02em;justify-self:end;align-items:center;gap:8px;font-size:12px;font-weight:700;display:inline-flex}.privacy-dot{background:var(--accent);width:8px;height:8px;box-shadow:0 0 0 4px color-mix(in srgb, var(--accent) 12%, transparent);border-radius:50%}main{width:min(1180px,100%);margin:0 auto}.hero{grid-template-columns:minmax(0,1.5fr) minmax(300px,.7fr);align-items:end;gap:80px;min-height:400px;padding:80px 0 68px;display:grid}.hero-copy{max-width:800px}.eyebrow,.section-kicker{color:var(--accent);letter-spacing:.13em;text-transform:uppercase;margin:0 0 18px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:11px;font-weight:800}.hero h1{letter-spacing:-.072em;max-width:780px;margin:0;font-size:clamp(42px,6.2vw,78px);font-weight:850;line-height:.98}.hero-title-line{display:block}.hero-description{max-width:650px;color:var(--muted);margin:28px 0 0;font-size:17px;line-height:1.8}.hero-inline-note{border:1px solid color-mix(in srgb, var(--accent) 26%, transparent);background:color-mix(in srgb, var(--accent-soft) 46%, transparent);width:fit-content;color:var(--accent-dark);border-radius:999px;margin:22px 0 0;padding:8px 12px;font-size:12px;font-weight:700}.trust-grid{border-top:1px solid var(--line-strong);border-bottom:1px solid var(--line-strong)}.trust-grid>div{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:24px;min-height:73px;display:flex}.trust-grid>div:last-child{border-bottom:0}.trust-grid strong{letter-spacing:-.04em;font-size:24px}.trust-grid span{color:var(--muted);font-size:12px}.workspace{border-radius:var(--radius-lg);background:linear-gradient(135deg, #ffffffa3, transparent 38%), var(--surface);box-shadow:var(--shadow);border:1px solid #18231d1c;padding:34px;position:relative}.workspace:before{content:"";background:linear-gradient(90deg, transparent, var(--accent), transparent);opacity:.42;width:46%;height:2px;position:absolute;inset:-1px auto auto 50%;transform:translate(-50%)}.workspace-heading{border-bottom:1px solid var(--line);justify-content:space-between;align-items:flex-start;gap:28px;min-height:72px;padding:2px 4px 28px;display:flex}.workspace-heading .section-kicker{margin-bottom:8px}.workspace-heading h2{letter-spacing:-.04em;margin:0;font-size:25px}.step-hint{color:var(--muted);letter-spacing:.06em;align-items:center;gap:18px;margin:10px 0 0;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:10px;font-weight:700;display:flex}.step-hint span{position:relative}.step-hint span+span:before{content:"";background:var(--line-strong);width:6px;height:1px;position:absolute;top:50%;right:calc(100% + 6px)}.workspace-grid{grid-template-columns:278px minmax(0,1fr);align-items:start;gap:28px;padding-top:30px;display:grid}.control-panel{border:1px solid var(--line);border-radius:var(--radius-md);background:#f0f0e8;padding:22px;position:sticky;top:24px}.control-title{border-bottom:1px solid var(--line);color:var(--muted);letter-spacing:.08em;text-transform:uppercase;justify-content:space-between;align-items:center;margin-bottom:25px;padding-bottom:16px;font-size:11px;font-weight:800;display:flex}.control-title strong{background:var(--ink);color:#fff;border-radius:7px;padding:5px 8px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:10px}.range-label{justify-content:space-between;align-items:center;margin-bottom:15px;font-size:13px;font-weight:800;display:flex}.range-label output{border:1px solid color-mix(in srgb, var(--accent) 24%, transparent);background:var(--accent-soft);min-width:46px;color:var(--accent-dark);text-align:center;border-radius:8px;padding:5px 8px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:11px}.quality-range{background:linear-gradient(to right, var(--accent) 0%, var(--accent) var(--range-fill,82%), #d4d8d0 var(--range-fill,82%), #d4d8d0 100%);appearance:none;cursor:pointer;border-radius:999px;width:100%;height:6px;margin:0}.quality-range:disabled{cursor:not-allowed;opacity:.45}.quality-range::-webkit-slider-thumb{border:4px solid var(--surface-strong);background:var(--accent);appearance:none;border-radius:50%;width:19px;height:19px;box-shadow:0 1px 4px #18231d40}.quality-range::-moz-range-thumb{border:4px solid var(--surface-strong);background:var(--accent);border-radius:50%;width:12px;height:12px;box-shadow:0 1px 4px #18231d40}.range-scale{color:var(--muted);justify-content:space-between;margin-top:9px;font-size:10px;display:flex}.switch-row{border-top:1px solid var(--line);cursor:pointer;grid-template-columns:1fr auto;align-items:center;gap:13px;margin-top:24px;padding-top:20px;display:grid;position:relative}.switch-row>span:first-child{gap:3px;display:grid}.switch-row strong{font-size:13px}.switch-row small,.format-note small,.engine-card small{color:var(--muted);font-size:10px;line-height:1.5}.switch-row input{opacity:0;width:1px;height:1px;position:absolute}.switch-track{border:1px solid var(--line-strong);background:#d8dcd4;border-radius:999px;width:38px;height:22px;transition:background .16s;position:relative}.switch-track:after{content:"";background:#fff;border-radius:50%;width:14px;height:14px;transition:transform .16s;position:absolute;top:3px;left:3px;box-shadow:0 1px 3px #18231d33}.switch-row input:checked+.switch-track{border-color:var(--accent);background:var(--accent)}.switch-row input:checked+.switch-track:after{transform:translate(16px)}.switch-row input:focus-visible+.switch-track{outline:3px solid color-mix(in srgb, var(--accent) 28%, transparent);outline-offset:3px}.format-note{background:color-mix(in srgb, var(--surface-strong) 74%, transparent);color:var(--ink);border-radius:11px;gap:3px;margin-top:20px;padding:13px;font-size:11px;font-weight:700;line-height:1.5;display:grid}.primary-action,.secondary-action{background:var(--accent);color:#fff;cursor:pointer;border:0;border-radius:12px;justify-content:space-between;align-items:center;font-weight:800;transition:background .16s,transform .16s,box-shadow .16s;display:inline-flex}.primary-action{width:100%;min-height:50px;margin-top:20px;padding:0 17px;font-size:13px}.primary-action span{font-size:18px}.primary-action:hover:not(:disabled),.secondary-action:hover:not(:disabled){background:var(--accent-dark);box-shadow:0 7px 20px color-mix(in srgb, var(--accent) 24%, transparent);transform:translateY(-1px)}.primary-action:active:not(:disabled),.secondary-action:active:not(:disabled){transform:translateY(0)}.primary-action:disabled,.secondary-action:disabled{color:#ffffffd1;background:#aeb6ae}.upload-column{min-width:0}.dropzone{border:1.5px dashed var(--line-strong);border-radius:var(--radius-md);background:linear-gradient(135deg, color-mix(in srgb, var(--accent-soft) 42%, transparent), transparent 47%), #ffffffb3;width:100%;min-height:250px;color:var(--ink);text-align:left;cursor:pointer;grid-template-columns:auto 1fr auto;align-items:center;gap:22px;padding:30px;transition:border-color .18s,background .18s,transform .18s;display:grid}.dropzone:hover:not(:disabled),.dropzone.drag-active{border-color:var(--accent);background:linear-gradient(135deg, color-mix(in srgb, var(--accent-soft) 78%, transparent), transparent 55%), #fff}.dropzone.drag-active{transform:scale(1.006)}.upload-glyph{border:1px solid color-mix(in srgb, var(--accent) 24%, transparent);background:var(--accent-soft);width:72px;height:72px;color:var(--accent);border-radius:50%;justify-content:center;align-items:center;font-size:28px;line-height:1;display:inline-flex}.dropzone-copy{gap:8px;display:grid}.dropzone-copy strong{letter-spacing:-.03em;font-size:22px}.dropzone-copy span{color:var(--muted);font-size:13px}.file-limit{color:var(--muted);align-self:end;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:10px}.queue{border:1px solid var(--line);border-radius:var(--radius-md);background:#ffffffb3;margin-top:18px;overflow:hidden}.queue-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:20px;min-height:55px;padding:0 18px;display:flex}.queue-header p{color:var(--muted);margin:0;font-size:12px}.queue-header p strong{color:var(--ink);font-size:15px}.text-button{color:var(--muted);cursor:pointer;background:0 0;border:0;padding:6px 0;font-size:11px;font-weight:800}.text-button:hover:not(:disabled){color:var(--danger)}.progress-track,.item-progress{background:var(--line);height:3px;overflow:hidden}.progress-track>span,.item-progress>span{border-radius:inherit;background:var(--accent);height:100%;transition:width .18s;display:block}.file-list{display:grid}.file-card{border-bottom:1px solid var(--line);grid-template-columns:54px minmax(0,1fr) auto auto;align-items:center;gap:14px;min-height:82px;padding:12px 16px;display:grid}.file-card:last-child{border-bottom:0}.file-card>img,.video-thumb{border:1px solid var(--line);object-fit:cover;background:#e8ebe5;border-radius:11px;width:54px;height:54px}.file-copy{gap:4px;min-width:0;display:grid}.file-copy>strong{text-overflow:ellipsis;white-space:nowrap;font-size:12px;overflow:hidden}.file-copy>span,.file-copy>em{color:var(--muted);font-size:10px;font-style:normal}.file-copy>em{color:var(--danger)}.file-result{justify-items:end;gap:5px;min-width:64px;display:grid}.saving,.status{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:9px;font-weight:800}.saving{background:var(--accent-soft);color:var(--accent-dark);border-radius:6px;padding:3px 6px}.saving.larger{color:var(--danger);background:#f5ddd7}.status{color:var(--muted)}.status-processing,.status-reading{color:var(--accent)}.status-done{color:var(--accent-dark)}.status-error{color:var(--danger)}.file-actions{align-items:center;gap:7px;display:flex}.file-actions button{border:1px solid var(--line);min-height:32px;color:var(--ink);cursor:pointer;background:#fff;border-radius:8px;padding:0 10px;font-size:10px;font-weight:800}.file-actions button:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.file-actions .remove-button{width:32px;color:var(--muted);padding:0;font-size:16px;font-weight:500}.file-actions .remove-button:hover:not(:disabled){color:var(--danger);background:#fff2ef;border-color:#e4b3a7}.queue-summary{border-top:1px solid var(--line);background:#f0f0e8;justify-content:space-between;align-items:center;gap:20px;padding:18px;display:flex}.queue-summary>div{gap:3px;display:grid}.queue-summary span,.queue-summary small{color:var(--muted);font-size:10px}.queue-summary strong{font-size:14px}.secondary-action{min-height:40px;padding:0 15px;font-size:11px}.live-message{min-height:20px;color:var(--muted);text-align:right;margin:16px 4px -8px;font-size:11px}.processing-note{border-top:1px solid var(--line);color:var(--muted);margin:18px 4px -8px;padding-top:16px;font-size:11px;line-height:1.65}.preset-list{gap:8px;display:grid}.preset-list button{border:1px solid var(--line);min-height:56px;color:var(--ink);text-align:left;cursor:pointer;background:#ffffffa3;border-radius:11px;justify-content:space-between;align-items:center;gap:12px;padding:0 12px;transition:border .16s,background .16s;display:flex}.preset-list button:hover:not(:disabled){border-color:var(--accent)}.preset-list button.active{border-color:var(--accent);background:var(--accent-soft)}.preset-list button span{gap:2px;display:grid}.preset-list button strong{font-size:12px}.preset-list button small{color:var(--muted);font-size:9px}.preset-list button em{color:var(--muted);font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:9px;font-style:normal}.preset-list button.active em{color:var(--accent-dark)}.engine-card{background:color-mix(in srgb, var(--surface-strong) 74%, transparent);border-radius:11px;grid-template-columns:auto 1fr;align-items:center;gap:10px;margin-top:18px;padding:13px;display:grid}.engine-card>div{gap:2px;display:grid}.engine-card strong{font-size:10px}.engine-light{background:#a7afa7;border-radius:50%;width:9px;height:9px}.engine-loading{background:#d39e3d;animation:1.2s ease-in-out infinite pulse}.engine-ready{background:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb, var(--accent) 12%, transparent)}.engine-error{background:var(--danger)}.video-file-card{grid-template-columns:112px minmax(0,1fr) auto auto}.video-thumb{width:112px;height:66px;position:relative;overflow:hidden}.video-thumb img{object-fit:cover;width:100%;height:100%}.video-thumb>span{width:100%;height:100%;color:var(--muted);justify-content:center;align-items:center;font-size:17px;display:flex}.video-thumb small{color:#fff;background:#101411bd;border-radius:5px;padding:2px 5px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:8px;position:absolute;bottom:5px;right:5px}.item-progress{border-radius:999px;width:min(230px,100%);margin-top:4px}.compact-summary{justify-content:flex-start}.compact-summary .summary-note{margin-left:auto;font-weight:700}.knowledge-section{background:linear-gradient(135deg, #ffffffd1, #ffffff85), var(--surface);border:1px solid #18231d17;border-radius:28px;margin-top:28px;padding:42px;box-shadow:0 24px 70px #19251f0d}.knowledge-header{border-bottom:1px solid var(--line);grid-template-columns:minmax(0,.9fr) minmax(320px,1.1fr);align-items:end;gap:64px;padding-bottom:30px;display:grid}.knowledge-header .section-kicker{margin-bottom:12px}.knowledge-header h2{letter-spacing:-.045em;max-width:560px;margin:0;font-size:clamp(28px,3.2vw,42px);line-height:1.08}.knowledge-header>p{max-width:600px;color:var(--muted);margin:0;font-size:13px;line-height:1.85}.knowledge-grid{grid-template-columns:minmax(0,.88fr) minmax(0,1.12fr);gap:44px;padding-top:32px;display:grid}.knowledge-panel-title{align-items:center;gap:10px;margin-bottom:20px;display:flex}.knowledge-panel-title span{color:var(--accent);font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:9px;font-weight:800}.knowledge-panel-title h3{margin:0;font-size:16px}.guide-list{margin:0;padding:0;list-style:none}.guide-list li{border-top:1px solid var(--line);grid-template-columns:32px minmax(0,1fr);gap:12px;padding:18px 0;display:grid}.guide-list li:last-child{border-bottom:1px solid var(--line)}.guide-list li>span{color:var(--accent);font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:9px;font-weight:800}.guide-list strong{font-size:12px;display:block}.guide-list p,.knowledge-note{color:var(--muted);margin:7px 0 0;font-size:11px;line-height:1.75}.knowledge-note{background:color-mix(in srgb, var(--accent-soft) 48%, transparent);color:var(--accent-dark);border-radius:10px;margin-top:16px;padding:13px 15px}.faq-list{border-top:1px solid var(--line)}.faq-list details{border-bottom:1px solid var(--line)}.faq-list summary{cursor:pointer;justify-content:space-between;align-items:center;gap:20px;min-height:56px;font-size:12px;font-weight:750;list-style:none;display:flex}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";color:var(--accent);font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:16px;font-weight:500}.faq-list details[open] summary:after{content:"−"}.faq-list details p{max-width:620px;color:var(--muted);margin:-2px 28px 18px 0;font-size:11px;line-height:1.8}.site-footer{width:min(1180px,100%);min-height:130px;color:var(--muted);border-top:1px solid #18231d1a;justify-content:space-between;gap:24px;margin:50px auto 0;padding:31px 0 44px;font-size:10px;display:flex}.site-footer p{margin:0}.footer-copy,.footer-meta{gap:6px;display:grid}.footer-meta{text-align:right;justify-items:end}.visit-stats{color:var(--ink);letter-spacing:.02em;align-items:center;gap:8px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,monospace;font-size:9px;font-weight:700;display:inline-flex}.visit-stats i{background:var(--accent);border-radius:50%;width:3px;height:3px}.visit-stats.muted{color:var(--muted);font-weight:500}.visually-hidden{clip:rect(0, 0, 0, 0)!important;white-space:nowrap!important;border:0!important;width:1px!important;height:1px!important;margin:-1px!important;padding:0!important;position:absolute!important;overflow:hidden!important}@keyframes pulse{0%,to{opacity:1}50%{opacity:.35}}@media (width<=920px){.site-header{grid-template-columns:1fr auto}.privacy-pill{display:none}.tool-nav{justify-self:end}.hero{grid-template-columns:1fr;gap:44px;padding:68px 0 54px}.trust-grid{grid-template-columns:repeat(3,1fr);display:grid}.trust-grid>div{border-right:1px solid var(--line);border-bottom:0;place-content:center start;gap:4px;padding:0 20px;display:grid}.trust-grid>div:last-child{border-right:0}.workspace-grid{grid-template-columns:1fr}.control-panel{position:static}.preset-list{grid-template-columns:repeat(2,1fr)}.knowledge-header,.knowledge-grid{grid-template-columns:1fr}.knowledge-header{gap:20px}}@media (width<=640px){.app-shell{padding:0 14px}.site-header{grid-template-columns:1fr;gap:14px;min-height:auto;padding:16px 0}.brand{margin:0 auto}.tool-nav{justify-self:stretch;width:100%}.tool-nav a{flex:1;justify-content:center;padding:0 10px}.hero{gap:34px;min-height:auto;padding:52px 4px 44px}.hero h1{letter-spacing:-.065em;font-size:clamp(40px,13vw,58px)}.hero-description{margin-top:22px;font-size:15px}.trust-grid>div{min-height:66px;padding:0 10px}.trust-grid strong{font-size:19px}.workspace{border-radius:22px;padding:18px}.knowledge-section{border-radius:22px;padding:24px 18px}.knowledge-grid{gap:32px}.workspace-heading{padding-bottom:20px;display:grid}.workspace-heading h2{font-size:21px}.step-hint{margin:0}.workspace-grid{gap:18px;padding-top:18px}.control-panel{padding:18px}.dropzone{text-align:center;grid-template-columns:1fr;justify-items:center;gap:14px;min-height:230px;padding:28px 20px}.upload-glyph{width:62px;height:62px}.dropzone-copy strong{font-size:19px}.file-limit{justify-self:center}.file-card,.video-file-card{grid-template-columns:54px minmax(0,1fr);padding:13px}.video-file-card{grid-template-columns:92px minmax(0,1fr)}.video-thumb{width:92px;height:58px}.file-result,.file-actions{grid-column:1/-1;justify-content:flex-end;justify-self:stretch;display:flex}.file-result{margin-top:3px}.queue-summary{flex-direction:column;align-items:stretch}.secondary-action{justify-content:center;width:100%}.live-message{text-align:left}.site-footer{flex-direction:column;justify-content:flex-start;align-items:flex-start;min-height:140px}.footer-meta{text-align:left;justify-items:start}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}