:root{--primary:#5b5ce2;--primary-hover:#494bcb;--primary-soft:#eef0ff;--page:#f7f8fc;--surface:#fff;--text:#182033;--muted:#5c667a;--subtle:#687386;--border:#e4e8f0;--success:#15956f;--warning:#b66a14;--danger:#d94b5b;--focus:#4f46e5;--shadow:0 10px 30px rgb(24 32 51/8%);--content-width:960px;font-family:Inter,PingFang SC,Microsoft YaHei,Noto Sans CJK SC,sans-serif;color:var(--text);background:var(--page)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--page);color:var(--text)}a{color:inherit;text-decoration:none}button,input,select{font:inherit}a,button,label,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.site-header{height:80px;background:var(--surface);border-bottom:1px solid var(--border)}.site-header__inner{width:min(1200px,calc(100% - 40px));height:100%;margin:auto;display:flex;align-items:center;justify-content:space-between}.brand{min-height:44px;display:inline-flex;align-items:center;gap:10px;font-size:20px;font-weight:750}.brand__mark{display:grid;place-items:center;width:30px;height:30px;color:#fff;background:var(--primary);border-radius:9px;font-size:17px;font-weight:700}.site-nav{display:flex;gap:32px;color:var(--muted);font-size:14px}.site-nav a{min-height:44px;display:inline-flex;align-items:center}.site-nav a:hover{color:var(--primary)}.hero{width:min(1200px,calc(100% - 40px));margin:0 auto;padding:60px 0 52px;display:flex;flex-direction:column;align-items:center}.eyebrow,.hero__badge{min-height:30px;padding:4px 12px;display:inline-flex;align-items:center;gap:6px;color:var(--primary);background:var(--primary-soft);border-radius:999px;font-size:13px;font-weight:650}.hero h1{margin:18px 0 10px;font-family:Inter,PingFang SC,Microsoft YaHei,Noto Sans CJK SC,sans-serif;font-size:clamp(36px,4vw,52px);font-weight:700;line-height:1.14;letter-spacing:-1.5px;text-align:center}.hero__lead{max-width:760px;margin:0;color:var(--muted);font-size:18px;line-height:1.65;text-align:center}.trust-row{display:flex;flex-wrap:wrap;justify-content:center;gap:24px;margin:18px 0 28px;color:var(--muted);font-size:14px}.trust-check{color:var(--success);font-weight:700}.tool-card{border:1px solid var(--border);border-radius:18px}.tool-card,.upload-card{width:min(var(--content-width),100%);background:var(--surface);box-shadow:var(--shadow)}.upload-card{min-height:340px;padding:44px 24px 28px;display:flex;flex-direction:column;align-items:center;justify-content:center;border:2px dashed #bfc4ee;border-radius:18px;transition:border-color .2s,background .2s}.upload-card.is-dragging{border-color:var(--primary);background:#f7f7ff}.state-icon,.upload-card__icon{width:58px;height:58px;display:grid;place-items:center;color:var(--primary);background:var(--primary-soft);border-radius:16px}.state-icon svg,.upload-card__icon svg{width:30px;height:30px}.upload-card h2{margin:18px 0 6px;font-size:22px}.upload-card>p:not(.privacy-note){margin:0 0 20px;color:var(--muted)}.upload-card__meta{display:flex;gap:16px;margin-top:18px;color:var(--subtle);font-size:12px}.privacy-note{min-height:24px;display:inline-flex;align-items:center;gap:6px;color:var(--muted);font-size:13px}.privacy-note svg{width:16px;height:16px;flex:0 0 auto;color:var(--success)}.upload-card .privacy-note{margin:14px 0 0}.button{min-height:46px;padding:0 22px;display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:10px;font-weight:650;line-height:1.2;white-space:nowrap;transition:background .2s,border-color .2s,transform .15s}.button:hover:not(:disabled){transform:translateY(-1px)}.button--primary{color:#fff;background:var(--primary)}.button--primary:hover:not(:disabled){background:var(--primary-hover)}.button--ghost{color:var(--text);background:var(--surface);border-color:var(--border)}.button--small{min-height:44px;padding:0 14px;font-size:13px}.button:disabled{color:var(--subtle);background:#e7e9ef;border-color:#e0e3ea;cursor:not-allowed;transform:none}.text-button{min-height:44px;padding:0 8px;border:0;color:var(--primary);background:transparent}.text-button--danger{color:var(--danger)}.icon-button{width:44px;height:44px;display:inline-grid;place-items:center;border:0;border-radius:8px;color:var(--muted);background:transparent}.icon-button:hover:not(:disabled){background:var(--primary-soft);color:var(--primary)}.icon-button--danger{color:var(--danger)}.icon-button:disabled{opacity:.35;cursor:not-allowed}.tool-panel{padding:24px}.panel-toolbar{min-height:56px;padding-bottom:12px;display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--border)}.panel-toolbar h2{margin:0 0 3px;font-size:18px}.panel-toolbar span{color:var(--muted);font-size:12px}.panel-toolbar__actions{display:flex;align-items:center;gap:10px}.file-list{margin:0;padding:16px 0;display:grid;gap:10px;list-style:none}.file-row{min-height:76px;padding:10px 12px;display:flex;align-items:center;gap:12px;background:#fbfcfe;border:1px solid var(--border);border-radius:11px}.file-row--error{background:#fff7f8;border-color:#f5c9cf}.drag-handle{display:inline-flex;color:#98a2b3;cursor:grab}.file-row__thumb{width:52px;height:52px;flex:0 0 52px;object-fit:cover;border-radius:8px;background:var(--primary-soft)}.file-row__thumb--placeholder{border:1px dashed #c5cae8}.file-row__main{min-width:0;flex:1;display:grid;gap:4px}.file-row__main strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px}.file-row__main span{color:var(--muted);font-size:12px}.file-row__main progress{width:min(420px,100%);height:7px;accent-color:var(--primary)}.file-row__main .file-row__error{color:var(--danger)}.file-row__actions{display:flex;gap:2px}.notice{margin:14px 0 0;padding:12px 14px;display:flex;align-items:flex-start;gap:10px;border-radius:10px;font-size:13px}.notice div{display:grid;gap:3px}.notice span{color:inherit}.notice--warning{color:#8b4a0d;background:#fff7ed;border:1px solid #fed7aa}.notice--info{color:#3f478e;background:var(--primary-soft);border:1px solid #d9dcff}.notice--error{color:#8f2634;background:#fff0f2;border:1px solid #f5c9cf}.editor-workspace{padding-top:18px;display:grid;grid-template-columns:minmax(0,1fr) 390px;gap:18px;border-top:1px solid var(--border);align-items:start}.preview-panel,.settings-panel{border:1px solid var(--border);border-radius:14px}.preview-panel{min-height:590px;padding:18px;background:#f3f5fa}.preview-panel__header{display:flex;align-items:center;justify-content:space-between;gap:12px}.preview-panel h3,.settings-panel h3{margin:0;font-size:17px}.preview-panel__header span{color:var(--muted);font-size:12px}.preview-canvas{min-height:500px;margin-top:12px;padding:20px;display:grid;place-items:center;overflow:auto;background:#e9ecf3;border-radius:10px}.preview-canvas.is-transparent{background-color:#fff;background-image:linear-gradient(45deg,#e6e8ee 25%,transparent 0),linear-gradient(-45deg,#e6e8ee 25%,transparent 0),linear-gradient(45deg,transparent 75%,#e6e8ee 0),linear-gradient(-45deg,transparent 75%,#e6e8ee 0);background-size:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0}.preview-canvas canvas{max-width:100%;max-height:500px;box-shadow:0 6px 18px rgb(24 32 51/16%)}.preview-error{color:var(--danger);text-align:center}.preview-status{margin:9px 0 0;color:var(--muted);font-size:12px;text-align:center}.settings-panel{max-height:590px;padding:18px;overflow:auto;background:var(--surface)}.settings-panel>h3{margin-bottom:18px}.settings-section{min-width:0}.settings-section+.settings-section{margin-top:16px}.settings-group{min-width:0;margin:0;padding:0;border:0}.settings-group legend{margin-bottom:10px;padding:0;font-size:13px;font-weight:700}.mode-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.mode-options legend{grid-column:1/-1}.mode-options label{min-height:52px;padding:8px;display:flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--border);border-radius:10px;color:var(--muted);font-size:12px;text-align:center;cursor:pointer}.mode-options label.is-selected{color:var(--primary);background:var(--primary-soft);border-color:var(--primary);box-shadow:inset 0 0 0 1px var(--primary)}.mode-options input,.segmented-options input{position:absolute;opacity:0;pointer-events:none}.mode-options label:has(input:focus-visible),.segmented-options label:has(input:focus-visible){outline:3px solid var(--focus);outline-offset:3px}.field-note--warning{grid-column:1/-1;color:var(--warning)!important}.settings-section--merge>.number-field{margin-top:12px}.background-color-settings .color-options{display:flex;flex-wrap:wrap;gap:8px}.color-choice{position:relative;min-height:44px;padding:0 12px;display:inline-flex;align-items:center;gap:8px;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:10px;cursor:pointer;font-size:12px;font-weight:650}.color-choice--selected{color:var(--primary);background:var(--primary-soft);border-color:var(--primary)}.color-choice>input[type=radio]{position:absolute;opacity:0;pointer-events:none}.color-choice:has(input[type=radio]:focus-visible){outline:3px solid var(--focus);outline-offset:3px}.color-choice svg{width:18px;height:18px;flex:0 0 auto;color:var(--primary)}.color-swatch{width:22px;height:22px;flex:0 0 auto;border:1px solid var(--border);border-radius:50%}.color-swatch--transparent{background-color:#fff;background-image:linear-gradient(45deg,#d9dde7 25%,transparent 0),linear-gradient(-45deg,#d9dde7 25%,transparent 0),linear-gradient(45deg,transparent 75%,#d9dde7 0),linear-gradient(-45deg,transparent 75%,#d9dde7 0);background-size:8px 8px;background-position:0 0,0 4px,4px -4px,-4px 0}.color-choice input[type=color]{width:24px;height:28px;padding:0;background:transparent;border:0}.segmented-options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));min-height:48px;padding:4px;gap:4px;background:#f0f2f6;border-radius:10px}.segmented-options label{min-width:0;min-height:40px;display:grid;place-items:center;border-radius:8px;color:var(--muted);font-size:12px;text-align:center;cursor:pointer}.segmented-options label:has(input:checked){color:var(--text);background:var(--surface);box-shadow:0 1px 3px rgb(24 32 51/8%);font-weight:650}.settings-section--layout>.number-field{margin-top:16px}.field-row{min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:14px;border-bottom:1px solid var(--border);font-size:13px}.field-row input[type=number],.field-row select{min-height:44px;border:1px solid var(--border);border-radius:8px;color:var(--text);background:var(--surface)}.field-row select{max-width:210px;padding:0 30px 0 10px}.number-field__control{display:inline-flex;align-items:center;gap:6px;color:var(--muted)}.number-field input{width:92px;min-height:44px;padding:0 8px;color:var(--text);background:var(--surface);border:1px solid var(--border);border-radius:8px;text-align:right}.number-field--compact input{width:100%}.field-row input[type=color]{width:44px;height:44px;padding:3px;border:1px solid var(--border);border-radius:8px;background:var(--surface)}.settings-section--canvas>.background-color-settings+.field-row{margin-top:16px}.settings-section--canvas>.field-row+.field-row{margin-top:12px}.advanced-settings{display:grid;gap:12px}.toggle-row{min-height:46px;display:flex;align-items:center;gap:9px;font-size:13px}.toggle-row input{width:20px;height:20px;accent-color:var(--primary)}.padding-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.padding-grid label{display:grid;gap:5px;color:var(--muted);font-size:11px}.padding-grid input{width:100%;min-height:44px;padding:0 6px;border:1px solid var(--border);border-radius:8px;text-align:right}.settings-section--output .field-note{margin-top:8px}.field-note{margin:9px 0 0;color:var(--muted);font-size:11px;line-height:1.5}.panel-actions,.result-actions,.state-actions{padding-top:18px;display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid var(--border)}.minimum-note{margin:10px 0 0;color:var(--warning);font-size:12px;text-align:right}.state-card{min-height:430px;padding:44px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}.state-card h2{margin:18px 0 6px}.state-card>p{margin:0;color:var(--muted)}.state-card small{margin-top:10px;color:var(--muted)}.state-icon--success{color:var(--success);background:#ecfdf5}.state-icon--error{color:var(--danger);background:#fff0f2}.batch-progress{width:min(560px,100%);height:12px;margin:24px 0 8px;accent-color:var(--primary)}.state-actions{margin-top:18px;border-top:0}.result-card{padding:24px}.result-heading{display:flex;align-items:center;gap:14px}.result-heading h2{margin:0 0 4px;font-size:24px}.result-heading p{margin:0;color:var(--muted);font-size:13px}.success-chip{margin-left:auto;color:var(--success);font-size:12px;font-weight:650}.result-layout{margin:20px 0;display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:20px}.result-preview{min-height:430px;padding:20px;display:grid;place-items:center;overflow:auto;background:#f3f5fa;border:1px solid var(--border);border-radius:14px}.result-preview img{display:block;max-width:100%;max-height:390px;box-shadow:0 6px 18px rgb(24 32 51/16%)}.result-summary{margin:0;padding:20px;display:grid;align-content:start;gap:14px;background:#fbfcfe;border:1px solid var(--border);border-radius:14px}.result-summary div{display:flex;justify-content:space-between;gap:12px;font-size:12px}.result-summary dt{color:var(--muted)}.result-summary dd{margin:0;overflow-wrap:anywhere;text-align:right;font-weight:650}.result-privacy{padding:12px;display:flex;gap:7px;color:#26715a;background:#ecfdf5;border-radius:10px;font-size:12px}.result-actions{justify-content:flex-end}.ad-safe-zone{width:min(var(--content-width),calc(100% - 40px));height:220px;margin:auto;padding:32px 0}.ad-placeholder{width:100%;height:156px;padding-top:18px;display:grid;place-items:start center;color:#6e7788;background:#f1f3f6;border:1px dashed #c8ced8;border-radius:10px;font-size:13px}.faq-section,.feature-section{width:min(var(--content-width),calc(100% - 40px));margin:auto;padding:62px 0}.section-heading{text-align:center}.section-heading h2{margin:0 0 8px;font-family:Inter,PingFang SC,Microsoft YaHei,Noto Sans CJK SC,sans-serif;font-size:34px;font-weight:700;line-height:1.2}.section-heading p{margin:0;color:var(--muted);font-size:16px;line-height:1.6}.feature-grid{margin-top:28px;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.feature-card{min-height:184px;padding:22px;background:var(--surface);border:1px solid var(--border);border-radius:12px}.feature-card__icon{width:42px;height:42px;display:grid;place-items:center;color:var(--primary);background:var(--primary-soft);border-radius:12px}.feature-card h3{margin:14px 0 5px;font-size:17px}.feature-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.65}.faq-list{margin-top:26px;display:grid;gap:10px}.faq-list details{padding:0 18px;background:var(--surface);border:1px solid var(--border);border-radius:10px}.faq-list summary{min-height:56px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-weight:650;cursor:pointer;list-style:none}.faq-list summary::-webkit-details-marker{display:none}.faq-toggle{position:relative;width:44px;height:44px;flex:0 0 44px}.faq-toggle:after,.faq-toggle:before{content:"";position:absolute;top:50%;left:50%;width:16px;height:2px;background:var(--muted);border-radius:999px;transform:translate(-50%,-50%)}.faq-toggle:after{transform:translate(-50%,-50%) rotate(90deg);transition:opacity .18s,transform .18s}.faq-list details[open] .faq-toggle:after{opacity:0;transform:translate(-50%,-50%) rotate(90deg) scaleX(0)}.faq-list p{margin:0 0 16px;color:var(--muted);line-height:1.7}.site-footer{min-height:260px;padding:56px 0 34px;color:#a9b1c5;background:#151a2b}.site-footer__inner{width:min(1200px,calc(100% - 40px));margin:auto;display:grid;grid-template-columns:1.4fr 1fr;gap:34px}.brand--footer{color:#fff}.site-footer p{font-size:13px}.site-footer nav{display:flex;justify-content:flex-end;gap:24px;font-size:13px}.site-footer__meta{grid-column:1/-1;padding-top:24px;display:flex;justify-content:space-between;border-top:1px solid #2a3042;color:#7f889e;font-size:12px}.legal-shell{width:min(860px,calc(100% - 40px));min-height:calc(100vh - 340px);margin:48px auto 72px}.legal-card{padding:clamp(28px,5vw,56px);background:var(--surface);border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow)}.legal-card h1{margin:16px 0 12px;font-size:clamp(34px,5vw,46px)}.legal-intro{max-width:680px;margin:0;color:var(--muted);font-size:17px;line-height:1.8}.legal-updated{margin:14px 0 34px;color:var(--subtle);font-size:13px}.legal-content{display:grid;gap:24px}.legal-content section{padding-top:22px;border-top:1px solid var(--border)}.legal-content h2{margin:0 0 8px;font-size:20px}.legal-content p{margin:0;color:var(--muted);line-height:1.85}@media (max-width:840px){.site-header{height:68px}.hero{padding-top:42px}.tool-panel{padding:20px}.editor-workspace{grid-template-columns:1fr}.preview-panel{order:-1;min-height:460px}.preview-canvas{min-height:370px}.settings-panel{max-height:none}.feature-grid{grid-template-columns:repeat(2,1fr)}.feature-card:last-child{grid-column:1/-1}}@media (max-width:560px){.ad-safe-zone,.faq-section,.feature-section,.hero,.site-footer__inner,.site-header__inner{width:min(100% - 32px,1200px)}.hero{padding:28px 0 34px}.hero h1{margin-top:14px;font-size:34px;text-align:center}.hero__lead{font-size:15px;line-height:1.7}.trust-row{gap:12px;margin:14px 0 18px;font-size:12px}.upload-card{min-height:330px;padding-inline:18px}.upload-card>p:not(.privacy-note){text-align:center;font-size:13px}.upload-card__meta{gap:8px}.result-card,.tool-panel{padding:14px;border-radius:15px}.panel-toolbar{align-items:flex-start}.panel-toolbar__actions{flex-direction:column-reverse;align-items:flex-end}.file-row{align-items:flex-start;flex-wrap:wrap}.drag-handle{align-self:center}.file-row__main{min-width:calc(100% - 90px)}.file-row__actions{width:100%;justify-content:flex-end}.editor-workspace{gap:14px}.preview-panel{min-height:360px;padding:14px}.preview-canvas{min-height:280px;padding:12px}.settings-panel{padding:14px}.settings-section+.settings-section{margin-top:14px}.mode-options{grid-template-columns:repeat(2,minmax(0,1fr))}.segmented-options{grid-template-columns:repeat(3,minmax(0,1fr))}.field-row select{max-width:180px}.padding-grid{grid-template-columns:repeat(2,1fr)}.panel-actions,.result-actions,.state-actions{flex-direction:column-reverse;align-items:stretch}.panel-actions .button,.result-actions .button,.state-actions .button{width:100%}.panel-actions .privacy-note{justify-content:center}.result-heading{align-items:flex-start}.success-chip{display:none}.result-layout{grid-template-columns:1fr}.result-preview{min-height:360px}.result-summary{order:2}.feature-grid{grid-template-columns:1fr}.feature-card:last-child{grid-column:auto}.faq-section,.feature-section{padding:48px 0}.section-heading h2{font-size:26px}.section-heading p{font-size:14px}.site-footer{padding-top:38px}.site-footer__inner{grid-template-columns:1fr}.site-footer nav{justify-content:flex-start;flex-direction:column;gap:12px}.site-footer__meta{grid-column:auto;flex-direction:column;gap:10px}.legal-shell{width:min(100% - 32px,860px);margin:28px auto 48px}.legal-card{padding:24px 20px}}@media (prefers-reduced-motion:reduce){*,:after,:before{scroll-behavior:auto!important;transition:none!important}}