:root{color-scheme:light;--bg:#f6f8fb;--panel:#fff;--soft:#f0f4f9;--ink:#162033;--muted:#667085;--faint:#94a0b2;--line:#dde3ec;--blue:#2563eb;--blue-dark:#1749b5;--blue-soft:#eaf1ff;--mint:#dff7ef;--green:#087c63;--orange:#f28b39;--red:#c74747;--shadow:0 18px 48px rgba(28,44,75,.09);--radius:8px;font-family:"Aptos","PingFang SC","Microsoft YaHei",system-ui,sans-serif}*{box-sizing:border-box}html{min-width:320px;background:var(--bg);scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--bg);font-size:14px}button,input,select,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}:focus-visible{outline:3px solid rgba(37,99,235,.3);outline-offset:2px}
:root[data-theme="dark"]{color-scheme:dark;--bg:#101722;--panel:#182232;--soft:#202c3e;--ink:#f1f5fa;--muted:#a5b0c1;--faint:#7e8aa0;--line:#303c50;--blue:#73a2ff;--blue-dark:#4f83ec;--blue-soft:#213961;--mint:#173e37;--green:#62d1b3;--orange:#f2a564;--red:#ef8e8e;--shadow:0 18px 50px rgba(0,0,0,.24)}
.site-header{position:sticky;top:0;z-index:50;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--panel) 92%,transparent);backdrop-filter:blur(16px)}.header-main{width:min(1240px,calc(100% - 32px));height:68px;margin:auto;display:flex;align-items:center;gap:30px}.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}.brand-mark{width:36px;height:36px;display:grid;place-items:center;color:#fff;border-radius:9px;background:var(--blue);box-shadow:0 8px 18px rgba(37,99,235,.25)}.brand-mark svg{width:19px}.brand-copy{display:grid;gap:1px}.brand-copy strong{font-size:18px;letter-spacing:0}.brand-copy small{color:var(--muted);font-size:10px}.category-nav{align-self:stretch;display:flex;align-items:center;gap:2px}.nav-group{height:100%;display:flex;align-items:center;position:relative}.category-button{height:38px;display:flex;align-items:center;gap:4px;padding:0 12px;color:var(--muted);border:0;border-radius:6px;background:transparent;font-weight:700;cursor:pointer}.category-button svg{width:14px}.nav-group:hover .category-button,.nav-group:focus-within .category-button,.category-button.active{color:var(--ink);background:var(--soft)}.nav-menu{position:absolute;top:57px;left:0;width:540px;display:grid;grid-template-columns:1fr 1fr;gap:5px;padding:14px;border:1px solid var(--line);border-radius:8px;background:var(--panel);box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(7px);transition:150ms ease}.nav-group:hover .nav-menu,.nav-group:focus-within .nav-menu{opacity:1;visibility:visible;transform:none}.nav-menu.compact-menu{width:370px}.menu-label{grid-column:1/-1;padding:2px 7px 6px;color:var(--faint);font-size:10px;font-weight:800;text-transform:uppercase}.nav-menu button{min-width:0;display:flex;align-items:center;gap:10px;padding:10px;color:var(--ink);border:0;border-radius:6px;background:transparent;text-align:left;cursor:pointer}.nav-menu button:hover{background:var(--blue-soft)}.nav-menu button>svg{flex:0 0 19px;width:19px;color:var(--blue)}.nav-menu button span{min-width:0;display:grid;gap:2px}.nav-menu b{font-size:12px}.nav-menu small{color:var(--muted);font-size:10px}.header-actions{margin-left:auto;display:flex;align-items:center;gap:9px}.privacy-chip{height:34px;display:flex;align-items:center;gap:6px;padding:0 10px;color:var(--green);border:1px solid color-mix(in srgb,var(--green) 25%,var(--line));border-radius:6px;background:var(--mint);font-size:11px;font-weight:750}.privacy-chip svg{width:15px}.icon-button{width:38px;height:38px;display:grid;place-items:center;padding:0;color:var(--ink);border:1px solid var(--line);border-radius:7px;background:var(--panel);cursor:pointer}.icon-button:hover{background:var(--soft)}.icon-button svg{width:17px}.mobile-menu{display:none}.quick-tools{height:42px;display:flex;align-items:center;justify-content:center;gap:5px;padding:0 16px;border-top:1px solid color-mix(in srgb,var(--line) 75%,transparent);overflow-x:auto;scrollbar-width:none}.quick-tools::-webkit-scrollbar{display:none}.quick-label{color:var(--faint);font-size:10px;font-weight:800;margin-right:5px}.quick-item{height:30px;display:flex;align-items:center;gap:6px;padding:0 10px;color:var(--muted);border:0;border-radius:5px;background:transparent;font-size:11px;font-weight:700;white-space:nowrap;cursor:pointer}.quick-item svg{width:14px}.quick-item:hover,.quick-item.active{color:var(--blue);background:var(--blue-soft)}
.mobile-tool-drawer,.drawer-scrim{display:none}.main-area{min-height:100vh}.workspace{width:min(1160px,calc(100% - 32px));margin:0 auto;padding:46px 0 70px}.tool-heading{text-align:center;margin:0 auto 26px}.tool-kicker{color:var(--blue);font:800 10px/1.3 Consolas,monospace;letter-spacing:1.1px;text-transform:uppercase}.tool-heading h1{margin:8px 0 10px;font-size:clamp(31px,4vw,48px);line-height:1.1;letter-spacing:0}.tool-heading>div:first-child>p{max-width:700px;margin:0 auto;color:var(--muted);font-size:15px;line-height:1.7}.trust-line{display:flex;justify-content:center;gap:20px;margin-top:15px;color:var(--muted);font-size:11px}.trust-line span{display:flex;align-items:center;gap:5px}.trust-line svg{width:14px;color:var(--green)}
.tool-stage{min-height:560px}.tool-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:14px;align-items:start}.work-panel,.settings-panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow)}.work-panel{min-height:540px;padding:18px}.settings-panel{position:sticky;top:126px;padding:18px}.panel-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}.panel-title h2{margin:0;font-size:15px}.panel-title span{color:var(--muted);font-size:11px}.upload-zone{min-height:205px;display:grid;place-items:center;align-content:center;gap:7px;padding:25px;border:1.5px dashed #b8c3d3;border-radius:7px;background:linear-gradient(180deg,var(--panel),var(--soft));text-align:center;cursor:pointer;transition:160ms ease}.upload-zone:hover,.upload-zone.dragging{border-color:var(--blue);background:var(--blue-soft);transform:translateY(-1px)}.upload-icon{width:50px;height:50px;display:grid;place-items:center;margin-bottom:3px;color:var(--blue);border-radius:50%;background:var(--blue-soft)}.upload-icon svg{width:23px}.upload-zone strong{font-size:16px}.upload-hint{color:var(--muted);font-size:11px}.pick-button,.primary-button,.secondary-button{min-height:41px;padding:0 14px;border-radius:6px;font-weight:750;cursor:pointer}.pick-button{display:flex;align-items:center;gap:6px;margin-top:6px;color:#fff;border:1px solid var(--blue-dark);background:var(--blue)}.pick-button svg{width:15px}.primary-button{color:#fff;border:1px solid #1749b5;background:#2563eb;box-shadow:0 8px 18px rgba(37,99,235,.18)}.primary-button:hover{background:#1d55cf}.primary-button:disabled{opacity:.46;cursor:not-allowed;box-shadow:none}.secondary-button{border:1px solid var(--line);background:var(--panel)}.wide{width:100%}.queue-header{display:flex;align-items:center;justify-content:space-between;margin:17px 0 8px}.queue-header strong{font-size:12px}.text-button{padding:5px 0;color:var(--red);border:0;background:transparent;font-size:11px;cursor:pointer}.file-list{display:grid;gap:7px}.file-item{min-width:0;display:grid;grid-template-columns:42px minmax(0,1fr) auto 34px;gap:9px;align-items:center;min-height:58px;padding:7px;border:1px solid var(--line);border-radius:6px;background:var(--panel)}.file-thumb{width:42px;height:42px;display:grid;place-items:center;border-radius:5px;background:var(--soft);overflow:hidden}.file-thumb img{width:100%;height:100%;object-fit:cover}.file-thumb svg{width:18px;color:var(--muted)}.file-info{min-width:0;display:grid;gap:3px}.file-info strong,.file-info span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-info strong{font-size:11px}.file-info span{color:var(--muted);font-size:10px}.file-status{color:var(--green);font-size:10px}.remove-file{width:30px;height:30px}.setting-group{margin:0 0 18px;padding:0;border:0}.setting-group legend,.field-label{display:block;margin:0 0 8px;font-size:11px;font-weight:750}.setting-group small,.field-label small{color:var(--muted);font-weight:500}.segmented{display:grid;grid-template-columns:repeat(var(--count,4),1fr);border:1px solid var(--line);border-radius:6px;overflow:hidden}.segmented label{min-width:0}.segmented input{position:absolute;opacity:0}.segmented span{height:38px;display:grid;place-items:center;padding:0 5px;border-right:1px solid var(--line);background:var(--panel);font-size:11px;font-weight:700;cursor:pointer}.segmented label:last-child span{border-right:0}.segmented input:checked+span{color:var(--blue);background:var(--blue-soft);box-shadow:inset 0 -2px 0 var(--blue)}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px}.field{min-width:0;display:grid;gap:6px}.field>span{color:var(--muted);font-size:10px}input[type=number],input[type=text],select,textarea{width:100%;min-height:40px;padding:0 10px;color:var(--ink);border:1px solid var(--line);border-radius:6px;background:var(--panel);outline:none}textarea{min-height:76px;padding-block:9px}input:focus,select:focus,textarea:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(37,99,235,.11)}input[type=range]{width:100%;accent-color:var(--blue)}input[type=color]{width:44px;height:40px;padding:3px;border:1px solid var(--line);border-radius:6px;background:var(--panel)}.range-row{display:grid;grid-template-columns:1fr 44px;gap:7px;align-items:center}.range-row output{color:var(--muted);font-size:11px;text-align:right}.check-row{display:flex;align-items:center;gap:8px;min-height:32px;color:var(--muted);font-size:11px;cursor:pointer}.check-row input{width:16px;height:16px;accent-color:var(--blue)}.action-stack{display:grid;gap:8px}.action-note{display:flex;align-items:flex-start;gap:6px;margin:2px 0 0;color:var(--muted);font-size:10px;line-height:1.5}.action-note svg{flex:0 0 13px;width:13px;margin-top:1px;color:var(--green)}.progress-bar{height:3px;border-radius:4px;background:var(--line);overflow:hidden;opacity:0}.progress-bar.visible{opacity:1}.progress-bar span{display:block;width:35%;height:100%;background:var(--blue);animation:progress 1s ease-in-out infinite alternate}@keyframes progress{to{transform:translateX(185%)}}.position-grid{width:106px;display:grid;grid-template-columns:repeat(3,30px);gap:5px}.position-grid label,.position-grid span{width:30px;height:30px}.position-grid input{position:absolute;opacity:0}.position-grid span{display:grid;place-items:center;border:1px solid var(--line);border-radius:5px;cursor:pointer}.position-grid span:after{content:"";width:5px;height:5px;border-radius:50%;background:var(--faint)}.position-grid input:checked+span{border-color:var(--blue);background:var(--blue-soft)}.position-grid input:checked+span:after{background:var(--blue)}
.seo-content{margin-top:92px}.seo-intro{max-width:760px}.seo-intro>span,.section-label{color:var(--blue);font:800 10px/1.3 Consolas,monospace;letter-spacing:1px;text-transform:uppercase}.seo-intro h2,.guide-layout h2,.related-tools h2,.faq-section h2{margin:10px 0 13px;font-size:clamp(25px,3vw,37px);line-height:1.18;letter-spacing:0}.seo-intro p{color:var(--muted);font-size:15px;line-height:1.8}.feature-band{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin:34px 0 90px;border-block:1px solid var(--line)}.feature-band article{padding:28px 26px;border-right:1px solid var(--line)}.feature-band article:last-child{border-right:0}.feature-band svg{width:22px;color:var(--blue)}.feature-band h3{margin:13px 0 7px;font-size:16px}.feature-band p{margin:0;color:var(--muted);font-size:12px;line-height:1.7}.guide-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;align-items:start;padding:0 0 90px}.guide-layout ol{margin:0;padding:0;list-style:none;border-top:1px solid var(--line)}.guide-layout li{display:grid;grid-template-columns:130px 1fr;gap:20px;padding:20px 0;border-bottom:1px solid var(--line)}.guide-layout li b{font-size:13px}.guide-layout li span{color:var(--muted);line-height:1.65}.related-tools{padding:0 0 90px}.related-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}.related-links a{padding:10px 13px;color:var(--muted);border:1px solid var(--line);border-radius:6px;background:var(--panel);font-size:12px}.related-links a:hover{color:var(--blue);border-color:var(--blue);background:var(--blue-soft)}.faq-section{max-width:860px;margin:auto}.faq-section h2{text-align:center;margin-bottom:26px}.faq-section>.section-label{display:block;text-align:center}.faq-section details{border-top:1px solid var(--line)}.faq-section details:last-child{border-bottom:1px solid var(--line)}.faq-section summary{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 2px;font-weight:750;cursor:pointer;list-style:none}.faq-section summary::-webkit-details-marker{display:none}.faq-section summary svg{width:17px;transition:transform 150ms}.faq-section details[open] summary svg{transform:rotate(45deg)}.faq-section details p{margin:-7px 0 20px;max-width:740px;color:var(--muted);line-height:1.75}.site-footer{width:min(1160px,calc(100% - 32px));display:flex;justify-content:space-between;gap:30px;margin:auto;padding:35px 0;border-top:1px solid var(--line);color:var(--muted)}.footer-brand{color:var(--ink);font-size:17px;font-weight:850}.site-footer p{margin:7px 0 0;font-size:11px}.site-footer nav{display:flex;align-items:center;flex-wrap:wrap;gap:18px;font-size:11px}.site-footer nav a:hover{color:var(--blue)}
.toast-region{position:fixed;right:20px;bottom:20px;z-index:90;display:grid;gap:8px}.toast{min-width:260px;display:flex;align-items:center;gap:9px;padding:12px 13px;color:#fff;border-radius:7px;background:#172033;box-shadow:0 14px 38px rgba(0,0,0,.25)}.toast.error{background:#8f3131}.toast svg{width:17px}
@media(max-width:900px){.category-nav,.privacy-chip{display:none}.mobile-menu{display:grid}.header-main{height:62px}.quick-tools{justify-content:flex-start}.workspace{padding-top:32px}.tool-layout{grid-template-columns:1fr}.settings-panel{position:static}.feature-band{grid-template-columns:1fr}.feature-band article{border-right:0;border-bottom:1px solid var(--line)}.feature-band article:last-child{border-bottom:0}.guide-layout{grid-template-columns:1fr;gap:18px}.mobile-tool-drawer{position:fixed;top:0;right:0;bottom:0;z-index:80;width:min(390px,90vw);display:block;padding:18px;color:var(--ink);background:var(--panel);box-shadow:-20px 0 50px rgba(0,0,0,.2);visibility:hidden;transform:translateX(105%);transition:180ms ease}.mobile-tool-drawer.open{visibility:visible;transform:none}.drawer-scrim{position:fixed;inset:0;z-index:70;display:block;background:rgba(10,18,31,.45);opacity:0;visibility:hidden;transition:180ms}.drawer-scrim.open{opacity:1;visibility:visible}.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.drawer-head strong{font-size:18px}.drawer-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px}.drawer-grid button{min-height:48px;display:flex;align-items:center;gap:8px;padding:0 11px;color:var(--ink);border:1px solid var(--line);border-radius:6px;background:var(--panel);text-align:left}.drawer-grid svg{width:17px;color:var(--blue)}}
@media(max-width:560px){.header-main,.workspace,.site-footer{width:min(100% - 22px,1160px)}.brand-copy small{display:none}.quick-label{display:none}.tool-heading{text-align:left}.tool-heading h1{font-size:30px}.tool-heading>div:first-child>p{font-size:13px}.trust-line{justify-content:flex-start;gap:12px;overflow-x:auto}.work-panel,.settings-panel{padding:12px}.upload-zone{min-height:188px;padding:18px 10px}.file-item{grid-template-columns:40px minmax(0,1fr) 32px}.file-status{display:none}.field-grid{grid-template-columns:1fr}.segmented{grid-template-columns:repeat(2,1fr)!important}.feature-band{margin-bottom:68px}.feature-band article{padding-inline:3px}.guide-layout{padding-bottom:68px}.guide-layout li{grid-template-columns:1fr;gap:6px}.related-tools{padding-bottom:68px}.site-footer{display:grid}.site-footer nav{gap:13px}.toast-region{left:11px;right:11px;bottom:11px}.toast{min-width:0}.drawer-grid{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition-duration:.001ms!important;animation-duration:.001ms!important}}
.result-empty[hidden]{display:none}
.result-section{margin-top:22px;padding-top:18px;border-top:1px solid var(--line)}.result-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:10px}.result-heading>div:first-child{display:flex;align-items:baseline;gap:8px}.result-heading span{font-size:12px;font-weight:800}.result-heading strong{color:var(--muted);font-size:10px}.result-actions{display:flex;align-items:center;gap:9px}.muted-action{color:var(--muted)}.result-download-all{min-height:34px;display:flex;align-items:center;gap:6px;padding-inline:11px;font-size:10px}.result-download-all svg{width:14px}.result-download-all:disabled{opacity:.45;cursor:not-allowed}.result-empty{min-height:92px;display:grid;place-items:center;align-content:center;gap:7px;color:var(--faint);border:1px dashed var(--line);border-radius:6px;background:var(--soft);font-size:10px}.result-empty svg{width:20px}.result-list{display:grid;gap:7px}.result-item{min-width:0;display:grid;grid-template-columns:38px minmax(0,1fr) 32px 32px;gap:8px;align-items:center;min-height:54px;padding:7px;border:1px solid color-mix(in srgb,var(--green) 22%,var(--line));border-radius:6px;background:color-mix(in srgb,var(--mint) 44%,var(--panel))}.result-icon{width:38px;height:38px;display:grid;place-items:center;color:var(--green);border-radius:5px;background:var(--panel)}.result-icon svg{width:18px}.result-info{min-width:0;display:grid;gap:3px}.result-info strong,.result-info small{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.result-info strong{font-size:11px}.result-info small{color:var(--muted);font-size:9px}.result-download,.result-remove{width:30px;height:30px}.result-download{color:var(--blue)}.result-remove{color:var(--muted)}
@media(max-width:560px){.result-heading{align-items:flex-start}.result-heading>div:first-child{display:grid;gap:2px}.result-actions{gap:6px}.result-download-all{padding-inline:9px}.result-item{grid-template-columns:36px minmax(0,1fr) 30px 30px}}
.result-list{grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px}.result-item{display:block;min-height:0;padding:0;overflow:hidden;background:var(--panel)}.result-preview{height:150px;display:grid;place-items:center;background:linear-gradient(45deg,color-mix(in srgb,var(--soft) 75%,var(--panel)) 25%,transparent 25% 75%,color-mix(in srgb,var(--soft) 75%,var(--panel)) 75%) 0 0/18px 18px,var(--panel);overflow:hidden}.result-preview img,.result-preview canvas{width:100%;height:100%;display:block;object-fit:contain}.result-preview canvas{background:#fff}.result-icon{width:48px;height:48px}.result-footer{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:7px;align-items:center;padding:9px}.result-buttons{display:flex;gap:4px}.result-info{display:grid}.result-download,.result-remove{width:29px;height:29px}
@media(max-width:560px){.result-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.result-preview{height:120px}.result-footer{grid-template-columns:1fr}.result-buttons{justify-content:flex-end}}