:root{--bg: #f8f7f4;--bg-tint: #f1efe9;--surface: #ffffff;--surface-muted: #f0ede6;--text: #1b1c1e;--text-muted: #5f6166;--text-faint: #7f8187;--border: #e6e3da;--border-strong: #d3cfc3;--brand: #b3593a;--brand-soft: rgba(179, 89, 58, .12);--green: #4a7c59;--blue: #4a6c93;--purple: #7a5f9e;--amber: #a97e3c;--danger: #b04a4a;--shadow-sm: 0 1px 2px rgba(27, 28, 30, .05), 0 1px 6px rgba(27, 28, 30, .04);--shadow-md: 0 2px 6px rgba(27, 28, 30, .06), 0 8px 24px rgba(27, 28, 30, .07);--ease-out: cubic-bezier(.22, 1, .36, 1);--t-fast: .18s;--radius: 14px;--radius-sm: 10px;--serif: "Georgia", "Times New Roman", "Songti SC", "STSong", "SimSun", serif;--sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace}html[data-theme=dark]{color-scheme:dark;--bg: #0e1116;--bg-tint: #141922;--surface: #161b22;--surface-muted: #1e242d;--text: #eef1f6;--text-muted: #a3acb8;--text-faint: #79828f;--border: #28303b;--border-strong: #3a444f;--brand: #e8825a;--brand-soft: rgba(232, 130, 90, .16);--green: #7fbf96;--blue: #8ab0d9;--purple: #b09cd4;--amber: #d9b478;--danger: #d98686;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .2), 0 1px 6px rgba(0, 0, 0, .15);--shadow-md: 0 2px 8px rgba(0, 0, 0, .25), 0 10px 30px rgba(0, 0, 0, .3)}*{box-sizing:border-box}html,body{height:100%}body{margin:0;font-family:var(--sans);color:var(--text);background:var(--bg);font-size:15px;line-height:1.6;transition:background-color .35s var(--ease-out),color .35s var(--ease-out)}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}html.mv-theme-vt{contain:paint}::selection{background:var(--brand-soft);color:var(--text)}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer}input,textarea,select{font-family:inherit}html.mv-theme-vt::view-transition-old(root),html.mv-theme-vt::view-transition-new(root){mix-blend-mode:normal}html.mv-theme-vt::view-transition-old(root){animation:none;opacity:1;z-index:1}html.mv-theme-vt::view-transition-new(root){animation:mv-theme-reveal .42s var(--ease-out) both;opacity:1;z-index:2;will-change:clip-path}html.mv-theme-vt *,html.mv-theme-vt *:before,html.mv-theme-vt *:after{transition:none!important;animation-play-state:paused!important}html[data-theme]{color-scheme:light dark}html[data-theme=light]{color-scheme:light}html[data-theme=dark]{color-scheme:dark}.app-shell{display:flex;min-height:100vh}.sidebar{width:236px;flex-shrink:0;padding:20px 14px;display:flex;flex-direction:column;gap:6px;position:sticky;top:0;height:100vh;border-right:1px solid var(--border);background:var(--bg-tint)}.brand{display:flex;align-items:center;gap:10px;padding:10px 12px 18px}.brand__logo{width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,var(--brand),color-mix(in srgb,var(--brand) 55%,var(--purple)));display:grid;place-items:center;color:#fff;font-family:var(--serif);font-size:19px;font-weight:700;box-shadow:var(--shadow-sm)}.brand__name{font-family:var(--serif);font-size:19px;font-weight:700;letter-spacing:.02em}.brand__sub{font-size:11px;color:var(--text-faint);letter-spacing:.14em;text-transform:uppercase}.nav-group{display:flex;flex-direction:column;gap:2px}.nav-link{display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:var(--radius-sm);color:var(--text-muted);font-size:14px;font-weight:550;transition:color var(--t-fast) var(--ease-out),background-color var(--t-fast) var(--ease-out)}.nav-link:hover{color:var(--text);background-color:var(--surface-muted)}.nav-link.is-active{color:var(--brand);background:var(--brand-soft);font-weight:650}.nav-link svg{flex-shrink:0}.sidebar__spacer{flex:1}.sidebar__foot{padding:10px 12px;font-size:11.5px;color:var(--text-faint);border-top:1px dashed var(--border)}.main-area{flex:1;min-width:0;padding:30px 36px 60px;max-width:1280px}.page-header{margin-bottom:24px;animation:mv-rise .4s var(--ease-out) both}.page-header h1{font-family:var(--serif);font-size:26px;margin:0 0 4px;letter-spacing:.01em}.page-header p{margin:0;color:var(--text-muted);font-size:13.5px}@keyframes mv-rise{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);transition:box-shadow .25s var(--ease-out),border-color .25s var(--ease-out),transform .25s var(--ease-out);contain:layout paint style}.card--hover:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:var(--border-strong)}.card__pad{padding:18px 20px}.card__title{font-size:13px;font-weight:650;color:var(--text-muted);letter-spacing:.08em;margin-bottom:14px;display:flex;align-items:center;justify-content:space-between}.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px;margin-bottom:18px}.stat-card__num{font-family:var(--serif);font-size:34px;font-weight:700;line-height:1.15}.stat-card__label{font-size:12.5px;color:var(--text-muted);margin-top:2px}.stat-card__tint{width:34px;height:4px;border-radius:2px;margin-top:12px}.btn{display:inline-flex;align-items:center;gap:7px;padding:8px 16px;border-radius:999px;border:1px solid var(--border-strong);background:var(--surface);color:var(--text);font-size:13.5px;font-weight:600;transition:border-color var(--t-fast) var(--ease-out),transform var(--t-fast) var(--ease-out),box-shadow var(--t-fast) var(--ease-out),color var(--t-fast) var(--ease-out);will-change:transform}.btn:hover{border-color:var(--text-faint);transform:translateY(-1px);box-shadow:var(--shadow-sm)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn--primary{background:var(--brand);border-color:var(--brand);color:#fff}.btn--primary:hover{filter:brightness(1.06);border-color:var(--brand)}.btn--ghost{border-color:transparent;background:transparent;color:var(--text-muted)}.btn--ghost:hover{color:var(--text);background:var(--surface-muted);box-shadow:none}.btn--sm{padding:5px 12px;font-size:12.5px}.btn--danger{color:var(--danger);border-color:color-mix(in srgb,var(--danger) 35%,transparent)}.input,.select,.textarea{width:100%;padding:9px 13px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:14px;transition:border-color var(--t-fast) var(--ease-out),box-shadow var(--t-fast) var(--ease-out),color var(--t-fast) var(--ease-out)}.input:focus,.select:focus,.textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}.textarea{resize:vertical;min-height:90px;line-height:1.6}.field{margin-bottom:14px}.field__label{display:block;font-size:12.5px;font-weight:650;color:var(--text-muted);margin-bottom:6px}.badge{display:inline-flex;align-items:center;gap:5px;padding:3px 10px;border-radius:999px;font-size:11.5px;font-weight:650;border:1px solid transparent}.badge--article{color:var(--blue);background:color-mix(in srgb,var(--blue) 12%,transparent)}.badge--video{color:var(--danger);background:color-mix(in srgb,var(--danger) 12%,transparent)}.badge--note{color:var(--green);background:color-mix(in srgb,var(--green) 12%,transparent)}.badge--inbox{color:var(--amber);background:color-mix(in srgb,var(--amber) 13%,transparent)}.badge--reading{color:var(--blue);background:color-mix(in srgb,var(--blue) 12%,transparent)}.badge--archived{color:var(--text-faint);background:var(--surface-muted)}.badge--tag{color:var(--text-muted);background:var(--surface-muted);border-color:var(--border);font-weight:550}.row-list{display:flex;flex-direction:column}.row{display:flex;align-items:center;gap:12px;padding:12px 16px;border-bottom:1px solid var(--border);transition:background-color var(--t-fast) var(--ease-out)}.row:last-child{border-bottom:none}.row:hover{background:var(--surface-muted)}.row__title{font-weight:600;font-size:14px}.row__meta{font-size:12px;color:var(--text-faint);margin-top:2px;display:flex;gap:10px;flex-wrap:wrap}.toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:16px}.toolbar__search{flex:1;min-width:220px;position:relative}.toolbar__search .input{padding-left:36px}.toolbar__search svg{position:absolute;left:12px;top:50%;transform:translateY(-50%);color:var(--text-faint)}.seg{display:inline-flex;background:var(--surface-muted);border:1px solid var(--border);border-radius:999px;padding:3px;gap:2px}.seg button{border:none;background:transparent;padding:5px 14px;border-radius:999px;font-size:12.5px;font-weight:600;color:var(--text-muted);transition:color var(--t-fast) var(--ease-out),background-color var(--t-fast) var(--ease-out),box-shadow var(--t-fast) var(--ease-out),transform var(--t-fast) var(--ease-out)}.seg button.is-on{background:var(--surface);color:var(--text);box-shadow:var(--shadow-sm)}.theme-toggle{position:relative;display:grid;place-items:center;width:38px;height:38px;border-radius:12px;border:1px solid var(--border);background:var(--surface);color:var(--text-muted);transition:color var(--t-fast) var(--ease-out),border-color var(--t-fast) var(--ease-out),transform var(--t-fast) var(--ease-out),box-shadow var(--t-fast) var(--ease-out);overflow:hidden}.theme-toggle:hover{color:var(--brand);border-color:var(--brand);transform:translateY(-1px);box-shadow:var(--shadow-sm)}.theme-toggle .icon-moon,.theme-toggle .icon-sun{grid-area:1 / 1;transition:opacity .22s var(--ease-out),transform .48s var(--ease-out);will-change:transform,opacity;backface-visibility:hidden}html[data-theme=light] .theme-toggle .icon-sun{opacity:0;transform:scale(.5) rotate(-90deg)}html[data-theme=light] .theme-toggle .icon-moon{opacity:1;transform:scale(1) rotate(0)}html[data-theme=dark] .theme-toggle .icon-moon{opacity:0;transform:scale(.5) rotate(90deg)}html[data-theme=dark] .theme-toggle .icon-sun{opacity:1;transform:scale(1) rotate(0)}.chat-layout{display:grid;grid-template-columns:250px 1fr;gap:16px;height:calc(100vh - 150px);min-height:480px}.chat-side{display:flex;flex-direction:column;overflow:hidden}.chat-list{flex:1;overflow-y:auto;padding:8px}.chat-item{padding:10px 12px;border-radius:var(--radius-sm);font-size:13px;color:var(--text-muted);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:6px;transition:background-color var(--t-fast) var(--ease-out),color var(--t-fast) var(--ease-out)}.chat-item:hover{background-color:var(--surface-muted)}.chat-item.is-on{background:var(--brand-soft);color:var(--brand);font-weight:650}.chat-main{display:flex;flex-direction:column;overflow:hidden}.chat-scroll{flex:1;overflow-y:auto;padding:20px 22px;display:flex;flex-direction:column;gap:16px}.msg{display:flex;gap:12px;max-width:88%;animation:mv-rise .3s var(--ease-out) both}.msg--user{align-self:flex-end;flex-direction:row-reverse}.msg__avatar{width:34px;height:34px;border-radius:11px;flex-shrink:0;display:grid;place-items:center;font-size:13px;font-weight:700;font-family:var(--serif)}.msg--user .msg__avatar{background:var(--blue);color:#fff}.msg--assistant .msg__avatar{background:linear-gradient(135deg,var(--brand),var(--purple));color:#fff}.msg__bubble{padding:12px 16px;border-radius:16px;font-size:14px;line-height:1.7;white-space:pre-wrap;word-break:break-word}.msg--user .msg__bubble{background:var(--brand);color:#fff;border-bottom-right-radius:4px}.msg--assistant .msg__bubble{background:var(--surface);border:1px solid var(--border);border-bottom-left-radius:4px;box-shadow:var(--shadow-sm)}.msg__refs{margin-top:10px;padding-top:10px;border-top:1px dashed var(--border);display:flex;flex-direction:column;gap:6px}.msg__ref{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--text-muted);padding:6px 10px;border-radius:8px;background:var(--surface-muted);transition:color var(--t-fast) var(--ease-out),background-color var(--t-fast) var(--ease-out)}.msg__ref:hover{color:var(--brand);background-color:var(--surface)}.ref-score{font-family:var(--mono);font-size:10.5px;color:var(--green);background:color-mix(in srgb,var(--green) 12%,transparent);padding:1px 6px;border-radius:6px}.chat-input{display:flex;gap:10px;padding:14px;border-top:1px solid var(--border)}.chat-input .textarea{min-height:46px;max-height:140px}.typing{display:inline-flex;gap:4px;align-items:center;padding:4px 2px}.typing i{width:6px;height:6px;border-radius:50%;background:var(--text-faint);animation:typing 1.2s infinite}.typing i:nth-child(2){animation-delay:.15s}.typing i:nth-child(3){animation-delay:.3s}@keyframes typing{0%,60%,to{transform:translateY(0);opacity:.4}30%{transform:translateY(-4px);opacity:1}}.modal-mask{position:fixed;top:0;right:0;bottom:0;left:0;background:color-mix(in srgb,var(--bg) 55%,rgba(0,0,0,.35));-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);display:grid;place-items:center;z-index:50;animation:mv-fade .2s var(--ease-out)}.modal{width:min(680px,calc(100vw - 40px));max-height:calc(100vh - 80px);overflow-y:auto;animation:mv-rise .28s var(--ease-out)}@keyframes mv-fade{0%{opacity:0}}.empty{text-align:center;padding:60px 20px;color:var(--text-faint)}.empty svg{opacity:.4;margin-bottom:14px}.empty h3{color:var(--text-muted);font-weight:600;margin:0 0 6px;font-family:var(--serif)}.empty p{margin:0;font-size:13px}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}.grid-32{display:grid;grid-template-columns:3fr 2fr;gap:16px}.mt-16{margin-top:16px}.mb-16{margin-bottom:16px}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:6px;border:2.5px solid var(--bg)}::-webkit-scrollbar-track{background:transparent}@media (max-width: 1080px){.grid-2,.grid-32{grid-template-columns:1fr}.chat-layout{grid-template-columns:1fr;height:auto}.chat-side{max-height:180px}.chat-main{height:70vh}}@media (max-width: 860px){.app-shell{flex-direction:column}.sidebar{width:100%;height:auto;position:static;flex-direction:row;align-items:center;padding:10px 16px;border-right:none;border-bottom:1px solid var(--border);overflow-x:auto}.brand{padding:0 10px 0 0}.brand__sub,.sidebar__foot{display:none}.nav-group{flex-direction:row}.main-area{padding:20px 16px 40px}}