/* 纸间 PaperLab · 样式表 */
:root{
  --header-bg:rgba(250,249,247,.88);
  --canvas-bg:#f0efec;
  --bg:#faf9f7; --surface:#ffffff; --surface-2:#f4f3f0; --surface-3:#ebe9e4;
  --border:#e6e3dc; --border-strong:#d8d4cb;
  --text:#1c2430; --text-2:#5d6673; --text-3:#929aa6;
  --primary:#e14b3b; --primary-dark:#c93c2e; --primary-soft:#fdf0ee;
  --shadow:0 6px 28px rgba(28,36,48,.07); --shadow-lg:0 18px 60px rgba(28,36,48,.14);
  --radius:14px; --radius-sm:9px;
  --pdf:#e14b3b; --doc:#2b5fbf; --xls:#1d8a5b; --img:#a663c4;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
}
[data-theme="dark"]{
  --header-bg:rgba(17,20,26,.88);
  --canvas-bg:#0d1016;
  --bg:#11141a; --surface:#191d25; --surface-2:#20252f; --surface-3:#2a303c;
  --border:#2c3240; --border-strong:#3b4352;
  --text:#edf0f5; --text-2:#a8b1c0; --text-3:#737d8d;
  --primary:#f2685a; --primary-dark:#e0564a; --primary-soft:#3a2321;
  --shadow:0 6px 28px rgba(0,0,0,.28); --shadow-lg:0 18px 60px rgba(0,0,0,.5);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--text);font-family:var(--font);font-size:14px;-webkit-font-smoothing:antialiased;line-height:1.6}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
button{cursor:pointer;border:none;background:none}
a{color:inherit;text-decoration:none}
.hidden{display:none !important}
.icon{flex:none;vertical-align:middle}
::selection{background:rgba(225,75,59,.22)}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:var(--header-bg);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.header-inner{max-width:1200px;margin:0 auto;height:64px;padding:0 22px;display:flex;align-items:center;gap:34px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;background:var(--primary);color:#fff;box-shadow:0 4px 12px rgba(225,75,59,.28)}
.brand-txt{display:flex;flex-direction:column;line-height:1.1}
.brand-txt b{font-size:17px;letter-spacing:1px}
.brand-txt small{font-size:10px;color:var(--text-3);letter-spacing:1.4px;margin-top:3px}
.main-nav{display:flex;gap:26px;font-size:13.5px;color:var(--text-2)}
.main-nav a{transition:color .18s}.main-nav a:hover{color:var(--primary)}
.header-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.privacy-pill{display:inline-flex;align-items:center;gap:6px;background:var(--surface);border:1px solid var(--border);color:var(--text-2);padding:6px 12px;border-radius:99px;font-size:12px;white-space:nowrap}
.privacy-pill svg{color:var(--xls)}
.icon-btn{width:34px;height:34px;border-radius:9px;display:inline-grid;place-items:center;color:var(--text-2);border:1px solid transparent;transition:.18s}
.icon-btn:hover{background:var(--surface-2);color:var(--primary);border-color:var(--border)}
.icon-btn:disabled{opacity:.35;cursor:not-allowed}
.site-header.compact .main-nav{display:none}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:74px 22px 30px;text-align:center}
.hero:before{content:"";position:absolute;inset:-160px 0 auto;height:420px;background:radial-gradient(ellipse at 50% 0%,rgba(225,75,59,.09),transparent 65%);pointer-events:none}
.hero:after{content:"";position:absolute;left:50%;top:-190px;width:560px;height:340px;transform:translateX(-50%);background:radial-gradient(circle,rgba(43,95,191,.07),transparent 70%);pointer-events:none}
.hero-inner{position:relative;max-width:790px;margin:0 auto}
.hero-kicker{display:inline-flex;align-items:center;gap:8px;font-size:12px;color:var(--text-2);background:var(--surface);border:1px solid var(--border);padding:6px 14px;border-radius:99px;box-shadow:var(--shadow)}
.hero-kicker i{width:6px;height:6px;border-radius:50%;background:var(--primary)}
.hero h1{font-size:clamp(32px,5.2vw,52px);line-height:1.22;letter-spacing:-1.2px;margin:22px 0 14px;font-weight:750}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero-sub{font-size:16px;color:var(--text-2);margin:0 auto;max-width:620px}
.hero-sub strong{color:var(--text);font-weight:650}

/* ---------- Dropzone ---------- */
.drop-section{max-width:960px;margin:0 auto;padding:22px 22px 12px}
.dropzone{position:relative;background:var(--surface);border:2px dashed var(--border-strong);border-radius:22px;padding:44px 24px 30px;text-align:center;box-shadow:var(--shadow);cursor:pointer;transition:.22s}
.dropzone:hover{border-color:var(--primary);background:var(--primary-soft);transform:translateY(-2px)}
.dz-icon{width:70px;height:70px;border-radius:20px;margin:0 auto 16px;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary)}
.dz-icon.big{width:90px;height:90px;border-radius:26px}
.dropzone h2{font-size:22px;margin:0 0 6px;font-weight:700}
.dropzone p{color:var(--text-2);margin:0 0 20px;font-size:13.5px}
.dz-formats{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin:24px 0 18px}
.fmt-chip{font-size:11px;font-weight:650;letter-spacing:.3px;padding:5px 10px;border-radius:6px;border:1px solid transparent}
.dz-note{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--text-3);border-top:1px solid var(--border);padding-top:16px;width:100%;justify-content:center}
.dz-note svg{color:var(--xls)}

.t-pdf{background:rgba(225,75,59,.1);color:var(--pdf);border-color:rgba(225,75,59,.16)}
.t-doc{background:rgba(43,95,191,.1);color:var(--doc);border-color:rgba(43,95,191,.16)}
.t-xls{background:rgba(29,138,91,.1);color:var(--xls);border-color:rgba(29,138,91,.16)}
.t-img{background:rgba(166,99,196,.1);color:var(--img);border-color:rgba(166,99,196,.16)}
.t-def{background:var(--surface-2);color:var(--text-2);border-color:var(--border)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:9px 16px;border-radius:9px;font-size:13.5px;font-weight:600;border:1px solid var(--border);background:var(--surface);color:var(--text);transition:.18s;white-space:nowrap}
.btn:hover{border-color:var(--primary);color:var(--primary)}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 4px 14px rgba(225,75,59,.22)}
.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark);color:#fff;transform:translateY(-1px)}
.btn-ghost{background:var(--surface)}
.btn-lg{padding:12px 30px;font-size:15px;border-radius:11px}
.btn-sm{padding:6px 11px;font-size:12px}
.btn-block{width:100%}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none}

/* ---------- Sections ---------- */
.section{max-width:1200px;margin:0 auto;padding:54px 22px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px;flex-wrap:wrap}
.eyebrow{display:block;font-size:10.5px;letter-spacing:2.2px;color:var(--primary);font-weight:750;margin-bottom:8px}
.section-head h2{font-size:26px;margin:0 0 4px;letter-spacing:-.5px}
.section-head p{color:var(--text-2);margin:0;font-size:13.5px}
.quick-section{padding-top:46px}
.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.quick-item{display:flex;align-items:center;gap:11px;background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:13px 14px;text-align:left;transition:.18s;color:var(--text)}
.quick-item:hover{border-color:var(--primary);box-shadow:var(--shadow);transform:translateY(-2px)}
.quick-badge{width:32px;height:32px;border-radius:8px;display:grid;place-items:center;flex:none}
.quick-txt{font-size:13.5px;font-weight:600;flex:1;white-space:nowrap}
.quick-txt i{font-style:normal;color:var(--text-3);margin:0 2px;font-weight:400}
.quick-item>svg{color:var(--text-3);flex:none}
.chips{display:flex;gap:7px;flex-wrap:wrap}
.chip{padding:6px 15px;border-radius:99px;background:var(--surface);border:1px solid var(--border);font-size:12.5px;color:var(--text-2);transition:.18s}
.chip:hover{color:var(--primary)}
.chip.on{background:var(--text);color:var(--bg);border-color:var(--text)}
.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.tool-card{display:flex;align-items:center;gap:13px;background:var(--surface);border:1px solid var(--border);border-radius:13px;padding:15px;text-align:left;transition:.18s;color:var(--text)}
.tool-card:hover{border-color:var(--primary);box-shadow:var(--shadow);transform:translateY(-2px)}
.tool-ico{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;flex:none}
.tool-txt{display:flex;flex-direction:column;min-width:0;flex:1}
.tool-txt b{font-size:14px;font-weight:650}
.tool-txt small{font-size:11.5px;color:var(--text-3);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.tool-arrow{color:var(--text-3);opacity:0;transform:translateX(-4px);transition:.18s}
.tool-card:hover .tool-arrow{opacity:1;transform:translateX(0);color:var(--primary)}
.why-section{border-top:1px solid var(--border);margin-top:26px}
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.why-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:24px}
.why-ico{width:42px;height:42px;border-radius:11px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;margin-bottom:14px}
.why-card h3{font-size:16px;margin:0 0 8px}
.why-card p{font-size:13px;color:var(--text-2);margin:0;line-height:1.8}
.why-foot{font-size:12px;color:var(--text-3);margin-top:18px;line-height:1.8}
.site-footer{border-top:1px solid var(--border);margin-top:20px}
.footer-inner{max-width:1200px;margin:0 auto;padding:24px 22px;display:flex;justify-content:space-between;gap:12px;color:var(--text-3);font-size:12px;flex-wrap:wrap}

/* ---------- Workspace ---------- */
.work{height:calc(100vh - 64px);display:flex;flex-direction:column;overflow:hidden}
.work-topbar{height:60px;flex:none;display:flex;align-items:center;gap:12px;padding:0 16px;background:var(--surface);border-bottom:1px solid var(--border)}
.file-badge{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;flex:none}
.file-meta{display:flex;flex-direction:column;min-width:0;line-height:1.3}
.file-meta b{font-size:13.5px;font-weight:650;max-width:300px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.file-meta small{font-size:11px;color:var(--text-3);margin-top:2px}
.work-topbar .btn-ghost{margin-left:4px}
.work-topbar .mobile-panel-btn{margin-left:auto;display:none}
.work-body{flex:1;min-height:0;display:grid;grid-template-columns:232px minmax(0,1fr) 318px}
.work-side{background:var(--surface);border-right:1px solid var(--border);overflow-y:auto;padding:16px 10px;min-height:0}
.side-sec{margin-bottom:22px}
.side-title{font-size:10.5px;letter-spacing:1.4px;color:var(--text-3);font-weight:750;padding:0 8px;margin-bottom:9px;display:flex;justify-content:space-between}
.side-title span{color:var(--text-3)}
.side-file{width:100%;display:flex;align-items:center;gap:9px;padding:8px;border-radius:9px;text-align:left;color:var(--text-2);transition:.16s;border:1px solid transparent}
.side-file:hover{background:var(--surface-2)}
.side-file.on{background:var(--primary-soft);border-color:rgba(225,75,59,.18);color:var(--text)}
.mini-badge{font-size:9.5px;font-weight:750;padding:3px 5px;border-radius:5px;flex:none;letter-spacing:.2px}
.side-file-name{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:12.5px}
.side-file small{font-size:10px;color:var(--text-3)}
.side-add{width:100%;display:flex;align-items:center;justify-content:center;gap:6px;padding:9px;border:1px dashed var(--border-strong);border-radius:9px;color:var(--text-2);font-size:12px;margin-top:6px;transition:.16s}
.side-add:hover{border-color:var(--primary);color:var(--primary)}
.side-tool{width:100%;display:flex;align-items:flex-start;gap:10px;padding:9px 8px;border-radius:9px;text-align:left;color:var(--text-2);transition:.16s}
.side-tool:hover{background:var(--surface-2)}
.side-tool.on{background:var(--primary-soft);color:var(--text)}
.side-tool.on .side-tool-ico{background:var(--primary);color:#fff}
.side-tool-ico{width:28px;height:28px;border-radius:8px;background:var(--surface-2);display:grid;place-items:center;flex:none;margin-top:1px}
.side-tool>span:last-child{display:flex;flex-direction:column;min-width:0}
.side-tool b{font-size:12.5px;font-weight:650}
.side-tool small{font-size:10.5px;color:var(--text-3);line-height:1.45;margin-top:1px}
.side-note{display:flex;gap:7px;padding:11px;background:var(--surface-2);border-radius:10px;font-size:11px;color:var(--text-3);line-height:1.6}
.side-note svg{flex:none;margin-top:2px;color:var(--xls)}

.work-main{display:flex;flex-direction:column;min-width:0;min-height:0;background:var(--bg)}
.preview-toolbar{height:44px;flex:none;display:flex;align-items:center;gap:10px;padding:0 14px;background:var(--surface);border-bottom:1px solid var(--border);overflow-x:auto;white-space:nowrap}
.tb-group{display:flex;align-items:center;gap:2px;background:var(--surface-2);border-radius:8px;padding:2px}
.tb-val{font-size:11.5px;color:var(--text-2);min-width:44px;text-align:center}
.tb-input{width:46px;height:26px;border:1px solid var(--border);background:var(--surface);border-radius:6px;text-align:center;font-size:12px;outline:none}
.tb-input:focus{border-color:var(--primary)}
.tb-hint{display:inline-flex;align-items:center;gap:6px;font-size:11.5px;color:var(--text-3)}
.tb-spacer{flex:1}
.preview-scroll{flex:1;min-height:0;overflow:auto;padding:24px;scroll-behavior:smooth;background:var(--canvas-bg)}
#previewArea{min-height:100%}
.loading-box,.empty-preview{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;height:60vh;color:var(--text-3);font-size:13px}
.empty-preview p{margin:0}

.work-panel{background:var(--surface);border-left:1px solid var(--border);display:flex;flex-direction:column;min-height:0}
.panel-head{height:52px;flex:none;display:flex;align-items:center;justify-content:space-between;padding:0 16px;border-bottom:1px solid var(--border)}
.panel-head b{font-size:13.5px}
.panel-head small{display:block;font-size:10.5px;color:var(--text-3)}
.panel-close{display:none}
.panel-scroll{flex:1;min-height:0;overflow-y:auto;padding:16px}
.panel-block{margin-bottom:22px}
.panel-title{font-size:11px;letter-spacing:1.2px;font-weight:750;color:var(--text-3);margin-bottom:11px;display:flex;justify-content:space-between;align-items:center}
.panel-title span{font-size:10px;font-weight:400;letter-spacing:0}
.opt-title{font-size:11px;letter-spacing:1.2px;font-weight:750;color:var(--text-3);margin:16px 0 9px;display:flex;justify-content:space-between;align-items:center}
.panel-block>.opt-title:first-child{margin-top:0}
.opt-count{background:var(--surface-2);color:var(--text-2);border-radius:99px;padding:1px 8px;font-size:10px;letter-spacing:0}
.opt-tip{font-size:11.5px;color:var(--text-3);line-height:1.75;margin:8px 0 12px}
.opt-row{display:flex;gap:7px;margin-bottom:8px;flex-wrap:wrap}
.opt-row .btn{flex:1;min-width:88px;padding:8px 9px;font-size:12px}
.opt-seg{display:grid;grid-template-columns:1fr 1fr;gap:7px}
.seg{display:flex;align-items:center;justify-content:center;gap:6px;padding:9px 5px;border:1px solid var(--border);border-radius:9px;font-size:11.5px;color:var(--text-2);background:var(--surface);transition:.16s}
.seg:hover{border-color:var(--primary)}
.seg.on{background:var(--primary-soft);border-color:var(--primary);color:var(--primary);font-weight:650}
.field{display:block;margin-bottom:11px}
.field>span{display:block;font-size:11px;color:var(--text-2);margin-bottom:5px}
.field input,.field select,.field textarea{width:100%;padding:9px 10px;border:1px solid var(--border);border-radius:8px;background:var(--surface);outline:none;font-size:12.5px;transition:.16s}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--primary)}
.field input[type=color]{height:36px;padding:3px;cursor:pointer}
.field textarea{resize:vertical;line-height:1.6}
.field-row{display:flex;gap:8px}
.field-row .field{flex:1;min-width:0}
.stat-line{display:flex;justify-content:space-between;gap:10px;padding:7px 0;border-bottom:1px dashed var(--border);font-size:12px;color:var(--text-2)}
.stat-line b{font-weight:600;color:var(--text);max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.export-block{border-top:1px solid var(--border);padding-top:18px}
.format-list{display:flex;flex-direction:column;gap:7px}
.format-item{display:flex;align-items:center;gap:10px;width:100%;padding:9px 10px;border:1px solid var(--border);border-radius:10px;background:var(--surface);text-align:left;transition:.16s}
.format-item:hover{border-color:var(--primary);background:var(--primary-soft);transform:translateX(2px)}
.format-item.primary{border-color:rgba(225,75,59,.4);background:var(--primary-soft)}
.fmt-icon{width:32px;height:32px;border-radius:8px;display:grid;place-items:center;flex:none}
.fmt-meta{display:flex;flex-direction:column;flex:1;min-width:0}
.fmt-meta b{font-size:12.5px;font-weight:650}
.fmt-meta small{font-size:10.5px;color:var(--text-3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.fmt-ext{font-size:10.5px;color:var(--text-3);font-weight:600}
.panel-safety{display:flex;align-items:center;gap:7px;font-size:11px;color:var(--text-3);padding:12px;background:var(--surface-2);border-radius:9px;margin-bottom:10px}
.panel-safety svg{color:var(--xls);flex:none}
.mobile-bar{display:none}

/* ---------- PDF 预览 ---------- */
.pdf-stage{display:flex;gap:18px;align-items:flex-start}
.pdf-thumbs{width:118px;flex:none;position:sticky;top:0;display:flex;flex-direction:column;gap:10px;max-height:calc(100vh - 175px);overflow-y:auto;padding-right:4px}
.thumbs-title{font-size:10.5px;color:var(--text-3);letter-spacing:1px;font-weight:700;position:sticky;top:0;background:var(--bg);padding:3px 0 6px;z-index:2}
.thumb{position:relative;border:2px solid transparent;border-radius:8px;padding:4px;background:var(--surface);box-shadow:var(--shadow);cursor:pointer;transition:.16s}
.thumb:hover{border-color:var(--primary)}
.thumb.dragging{opacity:.4}
.thumb canvas{display:block;width:100%;height:auto;border-radius:4px;background:#fff}
.thumb-no{position:absolute;left:7px;bottom:7px;background:rgba(28,36,48,.78);color:#fff;font-size:10px;padding:1px 6px;border-radius:4px}
.thumb-rot{position:absolute;right:7px;bottom:7px;background:rgba(225,75,59,.9);color:#fff;border-radius:4px;padding:1px 3px;display:grid;place-items:center}
.thumb-ops{display:flex;gap:2px;justify-content:center;margin-top:5px}
.thumb-ops button{width:22px;height:22px;border-radius:5px;background:var(--surface-2);color:var(--text-2);display:grid;place-items:center;font-size:13px;line-height:1}
.thumb-ops button:hover{background:var(--primary);color:#fff}
.pdf-pages{flex:1;min-width:0;display:flex;flex-direction:column;align-items:center;gap:22px}
.pdf-page-wrap{display:flex;flex-direction:column;align-items:center;gap:7px;max-width:100%}
.page-label{font-size:11px;color:var(--text-3);align-self:flex-start}
.pdf-page{position:relative;overflow:hidden;box-shadow:0 6px 26px rgba(28,36,48,.22);border:1px solid rgba(28,36,48,.12);background:#fff;flex:none;max-width:100%}
.pdf-page-inner{position:absolute;left:50%;top:50%;overflow:hidden;background:#fff}
.pdf-page-inner canvas{display:block;max-width:none}
.annot-layer{position:absolute;inset:0}
.annot{position:absolute;cursor:move;border:1px solid transparent}
.annot:hover{border-color:var(--primary)}
.annot-del{position:absolute;right:-9px;top:-9px;width:19px;height:19px;border-radius:50%;background:var(--primary);color:#fff;font-size:13px;line-height:17px;display:none;place-items:center;z-index:3}
.annot:hover .annot-del{display:grid}
.annot-rz{position:absolute;right:-5px;bottom:-5px;width:11px;height:11px;border-radius:2px;background:var(--primary);border:2px solid #fff;display:none;cursor:nwse-resize;z-index:3}
.annot:hover .annot-rz{display:block}
.annot-watermark{border:none}
.annot.draft{pointer-events:none}
.merge-list{display:flex;flex-direction:column;gap:6px;margin-bottom:11px}
.merge-item{display:flex;align-items:center;gap:7px;padding:7px;background:var(--surface-2);border-radius:8px;font-size:11.5px}
.merge-name{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.merge-item button{width:20px;height:20px;border-radius:5px;background:var(--surface);font-size:12px;color:var(--text-2)}
.merge-item button:disabled{opacity:.3}
.text-view,.source-view,.info-view{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:18px;max-width:920px;margin:0 auto}
.text-view-head{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:650;margin-bottom:12px;color:var(--text-2)}
.text-view-head .muted{font-weight:400;font-size:11px;color:var(--text-3)}
.text-view textarea,.source-view textarea{width:100%;min-height:56vh;background:var(--surface-2);border:1px solid var(--border);border-radius:9px;padding:14px;font-family:ui-monospace,Consolas,"Microsoft YaHei",monospace;font-size:12.5px;line-height:1.75;resize:vertical;outline:none;color:var(--text)}
.source-view textarea{min-height:38vh;margin-bottom:20px}
.info-card{max-width:620px;margin:0 auto}
.info-card h3{display:flex;align-items:center;gap:9px;font-size:16px;margin:0 0 16px}
.info-row{display:flex;align-items:center;gap:12px;padding:9px 0;border-bottom:1px dashed var(--border);font-size:12px;color:var(--text-2)}
.info-row b{flex:1;color:var(--text)}
.info-row em{font-style:normal;color:var(--primary);font-size:10.5px}
.muted{color:var(--text-3)}

/* ---------- 文档编辑器 ---------- */
.doc-wrap{max-width:900px;margin:0 auto}
.doc-toolbar{display:flex;align-items:center;gap:4px;flex-wrap:wrap;background:var(--surface);border:1px solid var(--border);border-radius:11px;padding:7px 9px;margin-bottom:14px;position:sticky;top:0;z-index:5;box-shadow:var(--shadow)}
.dt-select{height:29px;border:1px solid var(--border);border-radius:7px;background:var(--surface);padding:0 6px;font-size:11.5px;outline:none;max-width:110px}
.dt-font{max-width:96px}.dt-size{max-width:66px}
.dt-sep{width:1px;height:20px;background:var(--border);margin:0 4px}
.dt-btn{min-width:29px;height:29px;border-radius:7px;display:grid;place-items:center;color:var(--text-2);font-size:13px;transition:.15s}
.dt-btn:hover{background:var(--primary-soft);color:var(--primary)}
.dt-color{width:29px;height:29px;border:1px solid var(--border);border-radius:7px;padding:2px;background:var(--surface);cursor:pointer}
.doc-paper-scroll{background:var(--surface-3);border-radius:12px;padding:22px;overflow:auto}
.doc-page{background:#fff;color:#20242b;font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif;line-height:1.85;font-size:15px;padding:56px 62px;max-width:820px;margin:0 auto;min-height:900px;box-sizing:border-box;outline:none;box-shadow:0 4px 18px rgba(28,36,48,.1)}
.doc-page:focus{box-shadow:0 4px 18px rgba(225,75,59,.16)}
.doc-page h1{font-size:28px;line-height:1.4;margin:26px 0 14px}
.doc-page h2{font-size:22px;margin:22px 0 12px}
.doc-page h3{font-size:18px;margin:18px 0 10px}
.doc-page p{margin:0 0 12px}
.doc-page table{border-collapse:collapse;width:100%;margin:14px 0}
.doc-page td,.doc-page th{border:1px solid #cfd4db;padding:7px 10px}
.doc-page img{max-width:100%;height:auto}
.doc-page blockquote{border-left:3px solid #d8dce3;margin:12px 0;padding-left:16px;color:#5b6472}
.doc-page ul,.doc-page ol{padding-left:26px;margin:0 0 12px}
.doc-page hr{border:none;border-top:1px solid #d8dce3}
.doc-status{display:flex;justify-content:space-between;font-size:11px;color:var(--text-3);padding:8px 4px}

/* ---------- 表格编辑 ---------- */
.sheet-wrap{background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden;display:flex;flex-direction:column;min-height:70vh}
.sheet-bar{display:flex;align-items:center;gap:12px;padding:8px 10px;border-bottom:1px solid var(--border);flex-wrap:wrap}
.sheet-tabs{display:flex;gap:4px;flex:1;min-width:0;overflow-x:auto}
.sheet-tab{padding:6px 12px;border-radius:7px;font-size:12px;color:var(--text-2);background:var(--surface-2);white-space:nowrap}
.sheet-tab.on{background:var(--xls);color:#fff;font-weight:650}
.sheet-tab.add{background:transparent;border:1px dashed var(--border-strong);width:30px;padding:0}
.sheet-search{display:flex;align-items:center;gap:6px;border:1px solid var(--border);border-radius:8px;padding:4px 9px;color:var(--text-3)}
.sheet-search input{border:none;outline:none;background:transparent;width:150px;font-size:12px;color:var(--text)}
.sheet-scroll{flex:1;overflow:auto;max-height:64vh}
.sheet-grid{border-collapse:separate;border-spacing:0;font-size:12px;min-width:100%;table-layout:fixed}
.sheet-grid th,.sheet-grid td{border-right:1px solid var(--border);border-bottom:1px solid var(--border);padding:0;height:30px}
.sheet-grid .row-h{position:sticky;left:0;z-index:2;width:48px;min-width:48px;background:var(--surface-2);color:var(--text-3);font-weight:500;text-align:center;font-size:11px}
.sheet-grid .col-h{position:sticky;top:0;z-index:1;min-width:110px;background:var(--surface-2);color:var(--text-2);font-weight:600;text-align:center;font-size:11px}
.sheet-grid td{min-width:110px;background:var(--surface)}
.cell{width:100%;height:30px;border:none;background:transparent;padding:0 8px;outline:none;font-size:12px;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.cell:focus{box-shadow:inset 0 0 0 2px var(--primary);background:var(--surface)}
.cell.sel{box-shadow:inset 0 0 0 2px rgba(225,75,59,.55)}
.cell.hit{background:rgba(255,214,64,.32)}
.sheet-foot{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 12px;border-top:1px solid var(--border);font-size:11px;color:var(--text-3);flex-wrap:wrap}
.pager{display:flex;align-items:center;gap:4px}
.pager .icon-btn{width:26px;height:26px}

/* ---------- 图片 ---------- */
.image-stage{display:flex;flex-direction:column;align-items:center;gap:16px}
.image-main{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px;box-shadow:var(--shadow);max-width:100%;display:flex;justify-content:center}
.image-main img{max-width:100%;max-height:66vh;object-fit:contain;display:block;border-radius:6px}
.image-film{display:flex;gap:8px;overflow-x:auto;max-width:100%;padding:4px}
.film-item{position:relative;width:76px;height:62px;border-radius:8px;overflow:hidden;border:2px solid transparent;flex:none;background:var(--surface-2)}
.film-item.on{border-color:var(--primary)}
.film-item img{width:100%;height:100%;object-fit:cover}
.film-item span{position:absolute;left:3px;bottom:3px;background:rgba(28,36,48,.8);color:#fff;font-size:10px;padding:0 5px;border-radius:3px}

/* ---------- 全局层 ---------- */
.drop-overlay{position:fixed;inset:0;z-index:200;background:rgba(28,36,48,.55);backdrop-filter:blur(6px);display:grid;place-items:center;padding:24px}
.drop-overlay-inner{width:min(560px,100%);background:var(--surface);border:2px dashed var(--primary);border-radius:24px;padding:50px 24px;text-align:center;box-shadow:var(--shadow-lg)}
.drop-overlay-inner h2{font-size:23px;margin:16px 0 6px}
.drop-overlay-inner p{color:var(--text-2);margin:0;font-size:13px}
.busy{position:fixed;inset:0;z-index:220;background:rgba(20,24,32,.32);backdrop-filter:blur(2px);display:grid;place-items:center}
.busy-card{display:flex;align-items:center;gap:12px;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:16px 24px;box-shadow:var(--shadow-lg);font-size:13.5px;font-weight:600}
.spinner{width:19px;height:19px;border:2.5px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite;display:inline-block;flex:none}
@keyframes spin{to{transform:rotate(360deg)}}
.toast-box{position:fixed;bottom:22px;right:18px;z-index:300;display:flex;flex-direction:column;gap:9px;pointer-events:none}
.toast{display:flex;align-items:center;gap:9px;background:var(--surface);border:1px solid var(--border);border-left:3px solid var(--primary);border-radius:10px;padding:11px 15px;box-shadow:var(--shadow-lg);font-size:12.5px;max-width:340px;animation:toastIn .24s ease}
.toast.success{border-left-color:var(--xls)}.toast.success svg{color:var(--xls)}
.toast.error{border-left-color:var(--primary)}.toast.error svg{color:var(--primary)}
.toast.out{opacity:0;transform:translateX(16px);transition:.25s}
@keyframes toastIn{from{opacity:0;transform:translateX(18px)}to{opacity:1;transform:none}}
.modal{position:fixed;inset:0;z-index:250;background:rgba(20,24,32,.5);display:grid;place-items:center;padding:20px;backdrop-filter:blur(3px)}
.modal-card{width:min(480px,100%);background:var(--surface);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow-lg);overflow:hidden}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:15px 18px;border-bottom:1px solid var(--border)}
.modal-head h3{margin:0;font-size:15px}
.modal-body{padding:18px;max-height:64vh;overflow:auto}
.modal-foot{display:flex;justify-content:flex-end;gap:8px;padding:13px 18px;border-top:1px solid var(--border);background:var(--surface-2)}
.modal-body .opt-tip{margin:6px 0 0}

/* ---------- 移动端 ---------- */
@media(max-width:1100px){
  .quick-grid{grid-template-columns:repeat(2,1fr)}
  .tool-grid{grid-template-columns:repeat(2,1fr)}
  .work-body{grid-template-columns:200px minmax(0,1fr) 280px}
}
@media(max-width:900px){
  .header-inner{gap:16px;padding:0 14px}
  .main-nav{display:none}
  .privacy-pill{display:none}
  .hero{padding:48px 18px 20px}
  .section{padding:40px 18px}
  .work{height:calc(100dvh - 64px)}
  .work-body{display:flex;flex-direction:column;overflow:hidden}
  .work-side{flex:none;display:flex;gap:10px;overflow-x:auto;overflow-y:hidden;padding:9px 10px;border-right:none;border-bottom:1px solid var(--border)}
  .side-sec{display:flex;align-items:center;gap:6px;margin:0;flex:none}
  .side-title,.side-note,.side-file,.side-add{display:none}
  .side-tool{width:auto;flex:none;align-items:center;padding:7px 11px;gap:6px}
  .side-tool>span:last-child small{display:none}
  .side-tool b{font-size:12px;white-space:nowrap}
  .side-tool-ico{width:22px;height:22px;margin:0}
  .side-tool-ico svg{width:14px;height:14px}
  .work-main{flex:1;min-height:0}
  .preview-scroll{padding:14px}
  .work-panel{position:fixed;left:0;right:0;bottom:0;top:auto;height:min(74dvh,620px);z-index:120;border-left:none;border-top:1px solid var(--border);border-radius:18px 18px 0 0;transform:translateY(105%);transition:transform .26s ease;box-shadow:0 -12px 40px rgba(0,0,0,.16)}
  .work-panel.mobile-open{transform:translateY(0)}
  .panel-close{display:grid}
  .mobile-bar{display:block;flex:none;padding:9px 14px calc(9px + env(safe-area-inset-bottom));background:var(--surface);border-top:1px solid var(--border)}
  .work-topbar .mobile-panel-btn{display:grid}
  .work-topbar .btn-ghost{display:none}
  .file-meta b{max-width:170px}
  .pdf-thumbs{display:none}
  .pdf-pages{align-items:center}
  .why-grid{grid-template-columns:1fr}
  .toast-box{top:70px;bottom:auto;right:12px;left:12px}
  .toast{max-width:none}
}
@media(max-width:620px){
  .hero h1{font-size:31px}
  .hero-sub{font-size:14px}
  .dropzone{padding:32px 16px 24px}
  .quick-grid,.tool-grid{grid-template-columns:1fr}
  .section-head h2{font-size:22px}
  .doc-page{padding:28px 22px;min-height:600px}
  .doc-paper-scroll{padding:10px}
  .dt-font,.dt-size{display:none}
  .footer-inner{flex-direction:column;gap:4px}
  .preview-toolbar{padding:0 9px;gap:6px}
  .tb-hint{font-size:10.5px}
  .sheet-search{width:100%}
  .sheet-search input{flex:1}
  .file-meta small{display:none}
}