:root{--ink:#26242b;--muted:#8a8690;--line:#e9e4df;--cream:#f8f5f1;--paper:#fffdfa;--lav:#e9e3f6;--purple:#7860a7;--peach:#f5ddd0;--sage:#dfe9df;--yellow:#f6ebbf;--shadow:0 18px 50px rgba(78,63,88,.08)}*{box-sizing:border-box}body{margin:0;background:var(--cream);color:var(--ink);font-family:'Noto Sans SC','DM Sans',sans-serif}button,input,select,textarea{font:inherit}button{cursor:pointer;border:0;background:none;color:inherit}.app-shell{display:flex;min-height:100vh}.sidebar{width:252px;background:#f1ede8;border-right:1px solid var(--line);padding:34px 22px 22px;display:flex;flex-direction:column}.brand{font-weight:800;font-size:23px;letter-spacing:.08em;display:flex;align-items:center;gap:8px}.brand-mark{color:var(--purple);font-size:27px}.brand small{font-size:8px;letter-spacing:.14em;color:#a29aa0;margin-left:4px;margin-top:7px}.nav{margin-top:54px;display:grid;gap:8px}.nav-item{padding:11px 12px;border-radius:12px;text-align:left;color:#807b84;display:flex;gap:13px;align-items:center;font-size:13px}.nav-item span{font-size:18px;color:#9b91a4}.nav-item b{margin-left:auto;font-size:11px;color:#aaa2a7;font-weight:500}.nav-item.active{background:#e7e0f1;color:var(--purple);font-weight:700}.nav-item.active span{color:var(--purple)}.side-heading{margin:42px 12px 12px;color:#9a9499;font-size:11px;letter-spacing:.13em;display:flex;justify-content:space-between}.side-heading button{font-size:18px;color:#98919b}.category-list{display:grid;gap:4px}.category-item{padding:9px 13px;border-radius:10px;font-size:12px;color:#77727a;display:flex;align-items:center;gap:9px}.category-dot{width:7px;height:7px;border-radius:50%;background:#c6b5dc}.category-item b{margin-left:auto;font-size:10px;color:#aaa3a6;font-weight:400}.sidebar-bottom{margin-top:auto}.tip-card{background:#e9e0f1;padding:16px;border-radius:16px;color:#746285;display:flex;gap:10px;line-height:1.65;font-size:12px}.tip-card span{font-size:20px}.tip-card p{margin:0}.tip-card strong{color:#51415f}.storage{margin-top:20px;padding:0 4px;display:flex;justify-content:space-between;color:#aaa2a6;font-size:10px}.main{max-width:1450px;flex:1;padding:0 6vw 60px}.topbar{height:92px;display:flex;justify-content:space-between;align-items:center}.breadcrumb{font-size:12px;color:#aaa2a6}.breadcrumb span{margin:0 8px;color:#d1c9c6}.breadcrumb strong{color:#68616b}.top-actions{display:flex;align-items:center;gap:20px}.icon-btn{font-size:18px;color:#8d868d}.avatar{width:32px;height:32px;border-radius:50%;background:#d8c6bd;display:grid;place-items:center;font-size:12px;color:#fff}.hero{display:flex;justify-content:space-between;align-items:end;padding:55px 0 44px}.eyebrow{font-size:10px;color:#a39ba1;letter-spacing:.18em;margin:0 0 12px}.hero h1{font-size:42px;line-height:1.3;letter-spacing:-.04em;margin:0;font-weight:800}.hero h1 em{font-style:normal;color:var(--purple)}.subline{margin:16px 0 0;color:#9a9499;font-size:13px}.primary-btn{background:var(--purple);color:white;border-radius:12px;padding:12px 18px;font-weight:700;font-size:13px;box-shadow:0 8px 18px #7860a733;transition:.2s}.primary-btn:hover{transform:translateY(-2px);box-shadow:0 12px 22px #7860a744}.primary-btn span{font-size:18px;vertical-align:-1px;margin-right:5px}.toolbar{display:flex;justify-content:space-between;gap:20px;align-items:center;border-top:1px solid var(--line);padding-top:18px}.search-box{height:43px;background:var(--paper);border:1px solid var(--line);border-radius:12px;display:flex;align-items:center;padding:0 14px;flex:1;max-width:480px;color:#aaa1a5}.search-box span{font-size:25px;margin-right:9px}.search-box input{border:0;outline:0;background:none;font-size:12px;width:100%;color:var(--ink)}.filters{display:flex;gap:9px;align-items:center}.filters select{border:1px solid var(--line);background:var(--paper);color:#777078;border-radius:10px;padding:11px 13px;font-size:11px;outline:0}.view-toggle{font-size:17px;color:#b2abb0;padding:8px}.view-toggle.active{color:var(--purple)}.section-head{display:flex;align-items:end;justify-content:space-between;margin:40px 0 20px}.section-head h2{margin:0;font-size:21px;letter-spacing:-.02em}.section-head p{color:#aaa2a6;font-size:11px;margin:6px 0 0}.text-btn{color:var(--purple);font-size:11px}.notes-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(245px,1fr));gap:22px}.note-card{background:var(--paper);border:1px solid #eee9e5;border-radius:17px;overflow:hidden;box-shadow:0 7px 24px rgba(78,63,88,.035);transition:.22s;position:relative}.note-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.preview{height:190px;position:relative;background:var(--lav);overflow:hidden}.preview img{width:100%;height:100%;object-fit:cover}.preview.pdf{display:grid;place-items:center;background:var(--peach);font-size:43px;color:#a87565}.preview.pdf:after{content:'PDF';position:absolute;bottom:12px;right:12px;font-size:9px;letter-spacing:.1em;color:#a87565;border:1px solid #b98c7e;padding:4px 6px;border-radius:5px}.card-body{padding:15px 17px 17px}.card-meta{display:flex;justify-content:space-between;align-items:center;color:#aaa1a5;font-size:10px}.tag{padding:5px 8px;border-radius:6px;background:var(--sage);color:#6d836f;font-size:10px}.note-card:nth-child(3n) .tag{background:var(--yellow);color:#9b8351}.note-card:nth-child(3n+2) .tag{background:var(--lav);color:#796596}.card-title{font-size:15px;font-weight:700;margin:11px 0 7px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.purpose{font-size:11px;color:#958c91;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.card-actions{display:flex;justify-content:space-between;margin-top:15px;padding-top:12px;border-top:1px solid #f0ece9}.card-actions button{font-size:12px;color:#aaa1a5}.card-actions .delete:hover{color:#b66c6c}.empty-state{text-align:center;padding:80px 0;color:#9b9398}.empty-state.hidden,.modal-backdrop.hidden{display:none}.empty-icon{margin:auto auto 15px;width:55px;height:55px;display:grid;place-items:center;border-radius:18px;background:var(--lav);color:var(--purple);font-size:25px}.empty-state h3{color:var(--ink);margin:0 0 8px}.empty-state p{font-size:12px;margin:0 0 20px}.modal-backdrop{position:fixed;inset:0;background:#3c314477;backdrop-filter:blur(5px);z-index:10;display:grid;place-items:center;padding:20px}.modal{width:min(620px,100%);background:var(--paper);border-radius:23px;padding:30px;position:relative;box-shadow:0 25px 90px #30263b33}.modal-close{position:absolute;right:22px;top:18px;font-size:25px;color:#aaa1a5}.modal-title{display:flex;gap:13px;align-items:center;margin-bottom:24px}.mini-spark{width:37px;height:37px;border-radius:12px;background:var(--lav);color:var(--purple);display:grid;place-items:center}.modal-title h2{margin:0;font-size:24px}.dropzone{height:125px;border:1.5px dashed #c9bbd9;border-radius:16px;background:#fbf9fd;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--purple);cursor:pointer}.dropzone input{display:none}.upload-symbol{font-size:25px}.dropzone strong{font-size:12px;margin:5px}.dropzone small{font-size:10px;color:#aaa1a5}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px;margin:18px 0}.modal label:not(.dropzone){display:grid;gap:7px;font-size:11px;color:#827a82}.modal input,.modal select,.modal textarea{border:1px solid var(--line);background:#fffefa;border-radius:9px;padding:11px 12px;outline:0;font-size:12px;color:var(--ink);resize:vertical}.modal input:focus,.modal select:focus,.modal textarea:focus{border-color:#b5a2ce;box-shadow:0 0 0 3px #e9e3f666}.form-footer{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}.secondary-btn{padding:12px 18px;color:#8f878c;font-size:12px}.note-list{display:grid;gap:12px}.note-list .note-card{display:flex;height:112px}.note-list .preview{width:145px;height:100%;flex:none}.note-list .card-body{flex:1}.note-list .card-actions{display:none}@media(max-width:850px){.sidebar{width:205px}.main{padding:0 28px 45px}.hero{padding-top:35px}.hero h1{font-size:34px}}@media(max-width:650px){.sidebar{display:none}.main{padding:0 18px 40px}.hero{display:block}.hero .primary-btn{margin-top:24px}.toolbar{display:block}.search-box{max-width:none}.filters{margin-top:12px}.filters select{flex:1}.notes-grid{grid-template-columns:1fr 1fr;gap:12px}.preview{height:145px}.card-body{padding:12px}.card-title{font-size:13px}.form-grid{grid-template-columns:1fr}.modal{padding:23px}.hero h1{font-size:32px}}
body.warm-mode{--cream:#f4eee5;--paper:#fffaf0;--lav:#eee2d7;--purple:#a16e4b;--line:#eadfd4}
 .preview{cursor:zoom-in}.viewer-backdrop{position:fixed;inset:0;background:#241c2dcc;backdrop-filter:blur(7px);z-index:20;display:grid;place-items:center;padding:28px}.viewer-backdrop.hidden{display:none}.viewer{width:min(1000px,96vw);height:min(88vh,850px);position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center}.viewer-close{position:absolute;right:-5px;top:-14px;color:#fff;font-size:34px;z-index:2;line-height:1}.viewer img{max-width:100%;max-height:calc(100% - 36px);object-fit:contain;border-radius:10px;box-shadow:0 20px 70px #0006}.viewer iframe{width:min(900px,92vw);height:calc(100% - 32px);border:0;border-radius:10px;background:#fff;box-shadow:0 20px 70px #0006}.viewer-caption{color:#fff9;margin-top:12px;font-size:12px}
/* 左侧操作栏与预览窗口的稳定布局 */
.sidebar-upload{width:100%;margin-top:28px;padding:12px 14px;border-radius:12px;background:var(--purple);color:#fff;font-size:13px;font-weight:700;text-align:left;box-shadow:0 8px 18px #7860a733}.sidebar-upload span{font-size:18px;margin-right:6px}.hero{padding:45px 0 34px}.viewer-backdrop{display:grid!important;place-items:center!important;padding:24px!important}.viewer-backdrop.hidden{display:none!important}.viewer{width:min(1080px,94vw)!important;height:min(88vh,820px)!important;position:relative!important;margin:auto!important;display:block!important}.viewer #viewerContent{width:100%!important;height:100%!important;display:flex!important;align-items:center!important;justify-content:center!important}.viewer img{display:block!important;max-width:100%!important;max-height:100%!important;object-fit:contain!important;border-radius:12px!important}.viewer iframe{display:block!important;width:100%!important;height:100%!important;border-radius:12px!important}.viewer-close{position:absolute!important;top:12px!important;right:12px!important;width:42px!important;height:42px!important;border-radius:50%!important;background:#fff!important;color:#3f3448!important;font-size:30px!important;line-height:38px!important;z-index:50!important;box-shadow:0 5px 18px #0004!important}.viewer-caption{position:absolute!important;bottom:-28px!important;left:0!important;right:0!important;text-align:center!important;color:#fff!important;font-size:12px!important}@media(max-width:650px){.sidebar-upload{margin-top:20px}.viewer{width:94vw!important;height:82vh!important}.viewer-close{top:8px!important;right:8px!important}}
/* 顶部工具栏与可缩放图片查看 */
.topbar{height:76px}.toolbar{border-top:0!important;padding-top:0!important;padding-bottom:18px;border-bottom:1px solid var(--line)}.section-head{margin-top:30px}.viewer #viewerContent{overflow:hidden;cursor:zoom-in}.viewer #viewerContent.is-dragging{cursor:grabbing}.viewer #viewerContent img{will-change:transform;transform-origin:center center;transition:transform .08s ease-out;user-select:none;-webkit-user-drag:none}.viewer-help{position:absolute;top:-28px;left:0;right:0;text-align:center;color:#fff;font-size:11px;opacity:.82;pointer-events:none}
/* 视频预览与播放 */
.preview video{width:100%;height:100%;object-fit:cover;background:#312b37;pointer-events:none}.video-badge{position:absolute;left:12px;bottom:12px;border-radius:7px;background:#29222ccc;color:#fff;padding:5px 8px;font-size:10px;letter-spacing:.08em}.viewer video{display:block;max-width:100%;max-height:100%;border-radius:12px;background:#18141c;box-shadow:0 20px 70px #0006}