:root{--bg: #0a1120;--surface: #111a2e;--surface-2: #18243c;--surface-3: #22324f;--ink: #e9f0fa;--muted: #94a8c4;--faint: #7e93b4;--accent: #4cc3ff;--accent-strong: #7ed4ff;--accent-ink: #062033;--warn: #ffb454;--ok: #3ddc97;--danger: #ff6f6f;--border: #22324f;--border-strong: #35507a;--overlay: rgba(4, 10, 22, .72);--card-bg: #0d3f78;--card-ink: #f2fbff;--card-muted: rgba(238, 249, 255, .8);--card-tile: rgba(255, 255, 255, .1);--sp-1: 4px;--sp-2: 8px;--sp-3: 12px;--sp-4: 16px;--sp-5: 24px;--sp-6: 32px;--sp-7: 48px;--sp-8: 64px;--radius-lg: 18px;--radius: 12px;--radius-sm: 10px;--fs-display: clamp(3.5rem, 11vw, 8rem);--fs-xlarge: 1.75rem;--fs-large: 1.25rem;--fs-body: .9375rem;--fs-small: .875rem;--fs-caption: .8125rem;--shadow-float: 0 12px 32px rgba(2, 6, 18, .4);--shadow-modal: 0 24px 64px rgba(2, 6, 18, .5);font-family:PingFang SC,Microsoft YaHei,system-ui,-apple-system,Segoe UI,sans-serif;color-scheme:dark}:root[data-theme=light]{--bg: #f3f7fc;--surface: #ffffff;--surface-2: #eaf1f9;--surface-3: #dce8f5;--ink: #10202f;--muted: #34506e;--faint: #647b96;--accent: #0676d0;--accent-strong: #0a86e8;--accent-ink: #ffffff;--warn: #b4690e;--ok: #0d8a4c;--danger: #d34040;--border: #d8e3f0;--border-strong: #aec2da;--overlay: rgba(18, 30, 46, .45);--card-bg: #0b6fc4;--card-ink: #ffffff;--card-muted: rgba(255, 255, 255, .86);--card-tile: rgba(255, 255, 255, .14);color-scheme:light}*{box-sizing:border-box}html,body{max-width:100%;overflow-x:hidden}body{margin:0;background:var(--bg);color:var(--ink);min-height:100vh;min-height:100svh;font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}#app{max-width:960px;margin:0 auto;padding:var(--sp-6) var(--sp-5) var(--sp-8)}section{margin-bottom:var(--sp-7)}h1,h2,h3,h4{margin:0}.hint{color:var(--muted);font-size:var(--fs-caption)}.muted{color:var(--muted)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.skip-link{position:absolute;left:-9999px;top:0;background:var(--accent);color:var(--accent-ink);padding:var(--sp-2) var(--sp-4);border-radius:var(--radius-sm);font-weight:600;z-index:50}.skip-link:focus{left:var(--sp-4);top:var(--sp-2)}:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 65%,transparent);outline-offset:2px}.icon{width:1em;height:1em;vertical-align:-.125em;flex:0 0 auto}.topbar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:var(--sp-3);margin-bottom:var(--sp-3)}.app-title{font-size:22px;font-weight:750;letter-spacing:-.01em;margin:0}.topbar-right{display:flex;align-items:center;gap:var(--sp-2)}.sim-badge{display:inline-flex;align-items:center;gap:6px;background:color-mix(in srgb,var(--warn) 16%,var(--surface));color:var(--warn);font-size:13px;font-weight:600;padding:5px 12px;border-radius:999px;white-space:nowrap}.sim-badge .icon{width:14px;height:14px}.badge-sim{font-size:12px;font-weight:600;color:var(--muted);background:var(--surface-2);border-radius:999px;padding:2px 8px;vertical-align:middle}.sim-note{color:var(--muted);font-size:16px;line-height:1.7;max-width:62ch;margin:0 0 var(--sp-5)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;background:var(--surface-2);color:var(--ink);border:none;border-radius:var(--radius-sm);padding:9px 16px;font-size:14px;font-weight:600;font-family:inherit;cursor:pointer;transition:background-color .15s,color .15s,transform .08s;white-space:nowrap}.btn .icon{width:15px;height:15px}.btn:hover:not(:disabled){background:var(--surface-3)}.btn:active:not(:disabled){transform:translateY(1px)}.btn:disabled{opacity:.55;cursor:progress}.btn-primary{background:var(--accent);color:var(--accent-ink)}.btn-primary:hover:not(:disabled){background:var(--accent-strong);color:var(--accent-ink)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover:not(:disabled){background:color-mix(in srgb,var(--danger) 85%,#000);color:#fff}.btn-ghost{background:transparent;color:var(--muted)}.btn-ghost:hover:not(:disabled){background:var(--surface-2);color:var(--ink)}.btn-small{padding:6px 12px;font-size:13px}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;background:var(--surface-2);border:none;border-radius:var(--radius-sm);color:var(--ink);cursor:pointer;transition:background-color .15s,transform .08s}.icon-btn .icon{width:18px;height:18px}.icon-btn:hover{background:var(--surface-3)}.icon-btn:active{transform:translateY(1px)}.controls{margin-bottom:var(--sp-5)}.toolbar{display:flex;flex-wrap:wrap;gap:var(--sp-2);align-items:center;margin-bottom:var(--sp-3)}.search-field{flex:1 1 240px;min-width:0;display:flex}input.city-search{width:100%;min-width:0;background:var(--surface);color:var(--ink);border:1px solid var(--border);border-radius:var(--radius-sm);padding:10px 14px;font-size:14px;font-family:inherit;transition:border-color .15s,background-color .15s}input.city-search::placeholder{color:var(--faint)}input.city-search:focus{outline:3px solid color-mix(in srgb,var(--accent) 28%,transparent);outline-offset:0;border-color:var(--accent)}.toolbar-actions{display:flex;flex-wrap:wrap;gap:var(--sp-2);align-items:center;margin-left:auto}.unit-toggle{display:inline-flex;background:var(--surface-2);border-radius:var(--radius-sm);padding:3px;gap:2px}.unit-btn{background:transparent;color:var(--muted);border:none;padding:6px 14px;font-size:14px;font-weight:600;font-family:inherit;cursor:pointer;border-radius:8px;transition:background-color .15s,color .15s}.unit-btn:hover{color:var(--ink)}.unit-btn.active{background:var(--accent);color:var(--accent-ink)}.city-list{display:flex;flex-wrap:wrap;gap:var(--sp-2)}.city-item{display:inline-flex;align-items:stretch;gap:4px;min-width:0}.city-btn{background:var(--surface);color:var(--ink);border:none;border-radius:999px;padding:8px 16px;font-size:14px;font-family:inherit;cursor:pointer;transition:background-color .15s,color .15s,transform .08s;max-width:160px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.city-btn:hover{background:var(--surface-2)}.city-btn.active{background:var(--accent);color:var(--accent-ink);font-weight:700}.custom-tag{display:inline-block;margin-left:6px;font-size:11px;line-height:1.4;background:color-mix(in srgb,currentColor 14%,transparent);border-radius:4px;padding:0 4px;vertical-align:1px}.fav-btn{display:inline-flex;align-items:center;justify-content:center;width:34px;background:var(--surface);border:none;border-radius:999px;color:var(--faint);cursor:pointer;transition:background-color .15s,color .15s,transform .08s}.fav-btn .icon{width:15px;height:15px}.fav-btn:hover{background:var(--surface-2);color:var(--warn)}.fav-btn.fav{background:color-mix(in srgb,var(--warn) 16%,var(--surface));color:var(--warn)}.empty-state{display:flex;align-items:center;gap:var(--sp-4);background:var(--surface-2);border-radius:var(--radius-lg);padding:var(--sp-5);color:var(--muted);flex-wrap:wrap}.empty-state.inline{margin-bottom:var(--sp-4)}.empty-state.ok{background:color-mix(in srgb,var(--ok) 8%,var(--surface))}.empty-icon{display:inline-flex;flex:0 0 auto;color:var(--accent)}.empty-icon .icon{width:24px;height:24px}.empty-text{display:flex;flex-direction:column;gap:4px;min-width:0;flex:1 1 200px}.empty-text strong{color:var(--ink);font-size:15px}.empty-text span{font-size:13px}.banner{display:flex;align-items:center;justify-content:space-between;gap:var(--sp-3);flex-wrap:wrap;border-radius:var(--radius);padding:var(--sp-3) var(--sp-4);margin-bottom:var(--sp-4);font-size:14px;line-height:1.5}.banner .icon{width:16px;height:16px}.banner-text{display:inline-flex;align-items:center;gap:6px;min-width:0}.banner-warn{background:color-mix(in srgb,var(--warn) 14%,var(--surface));color:var(--warn)}.error-panel{background:var(--surface);border-radius:var(--radius-lg);padding:var(--sp-6);margin:var(--sp-8) 0}.error-panel h2{margin:0 0 var(--sp-3);font-size:20px}.error-message{font-size:14px;background:var(--surface-2);border-radius:var(--radius);padding:var(--sp-4);overflow-wrap:anywhere}.day-tabs{display:flex;gap:var(--sp-2);overflow-x:auto;padding-bottom:2px;margin-bottom:var(--sp-4);scrollbar-width:thin;-webkit-overflow-scrolling:touch}.day-tab{flex:0 0 auto;display:flex;flex-direction:column;align-items:center;gap:3px;min-width:72px;background:var(--surface);border:none;border-radius:var(--radius);padding:10px 12px;color:var(--ink);font-family:inherit;font-size:13px;cursor:pointer;transition:background-color .15s,color .15s,transform .08s}.day-tab:hover{background:var(--surface-2)}.day-tab.active{background:color-mix(in srgb,var(--accent) 16%,var(--surface));color:var(--accent-strong)}.day-tab-name{font-weight:700;font-size:14px}.day-tab-date{color:var(--muted);font-size:12px}.day-tab-cond{line-height:1}.day-tab-cond .icon{width:20px;height:20px}.current-card{position:relative;background:var(--card-bg);color:var(--card-ink);border-radius:var(--radius-lg);padding:var(--sp-6);margin-bottom:var(--sp-5);display:flex;flex-wrap:wrap;gap:var(--sp-6);align-items:center;justify-content:space-between;overflow:hidden}.current-deco{position:absolute;right:-28px;top:50%;transform:translateY(-50%);width:240px;height:240px;color:#ffffff29;pointer-events:none}.current-deco .icon{width:100%;height:100%;stroke-width:.9}.current-left{min-width:0;position:relative;z-index:1}.current-left .city-name{font-size:20px;font-weight:600;margin:0;display:flex;align-items:center;gap:6px}.current-left .city-name .icon-fav-star{width:16px;height:16px;color:#ffd66b}.current-left .date-line{font-size:13px;opacity:.85;margin:6px 0 10px}.temp-main{font-size:var(--fs-display);font-weight:750;line-height:1;margin:0;letter-spacing:-.03em;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}.temp-unit{font-size:.28em;font-weight:600;margin-left:6px;opacity:.9}.condition-line{font-size:18px;margin:12px 0 0;display:flex;align-items:center;gap:8px}.cond-icon{display:inline-flex}.cond-icon .icon{width:22px;height:22px}.metrics{display:grid;grid-template-columns:repeat(2,minmax(110px,1fr));gap:var(--sp-3);min-width:0;position:relative;z-index:1}.metric{background:var(--card-tile);border-radius:var(--radius);padding:var(--sp-3) var(--sp-4);min-width:0}.metric .label{font-size:12px;opacity:.85}.metric .value{font-size:20px;font-weight:700;margin-top:4px;font-variant-numeric:tabular-nums}.fav-current{margin-bottom:var(--sp-2)}.mini-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:var(--sp-3);margin-bottom:var(--sp-6)}.mini-card{background:var(--surface);border-radius:var(--radius-lg);padding:var(--sp-5);min-width:0}.mini-title{font-size:14px;font-weight:700;margin:0 0 var(--sp-4);display:flex;align-items:center;gap:8px}.mini-title .icon{width:16px;height:16px;color:var(--accent)}.sun-row{display:flex;gap:var(--sp-3);margin-bottom:var(--sp-4)}.sun-item{flex:1 1 0;min-width:0;background:var(--surface-2);border-radius:var(--radius);padding:var(--sp-3)}.sun-label{display:block;font-size:12px;color:var(--muted)}.sun-value{font-size:22px;font-weight:700;font-variant-numeric:tabular-nums}.mini-list{margin:0;display:flex;flex-direction:column;gap:8px}.mini-list>div{display:flex;justify-content:space-between;gap:var(--sp-3);font-size:13px}.mini-list dt{color:var(--muted)}.mini-list dd{margin:0;font-weight:600;text-align:right;font-variant-numeric:tabular-nums}.mini-advice{color:var(--muted);font-size:14px;margin:var(--sp-4) 0 0;line-height:1.7;max-width:52ch}.aqi-head{display:flex;align-items:baseline;gap:var(--sp-3);margin-bottom:var(--sp-3)}.aqi-value{font-size:var(--fs-xlarge);font-weight:800;line-height:1;font-variant-numeric:tabular-nums}.aqi-pill{font-size:12px;font-weight:700;border-radius:999px;padding:3px 12px}.aqi-gauge{height:6px;border-radius:999px;background:var(--surface-2);overflow:hidden;margin-bottom:var(--sp-4)}.aqi-gauge>span{display:block;height:100%;border-radius:999px}.alerts-region{margin-bottom:var(--sp-6)}.alerts-summary{margin:0 0 var(--sp-3);font-size:14px;font-weight:600;display:flex;align-items:center;gap:6px;color:var(--warn)}.alerts-summary .icon{width:16px;height:16px}.alert-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--sp-2)}.alert-item{display:flex;gap:var(--sp-3);align-items:flex-start;background:var(--surface);border-radius:var(--radius);padding:var(--sp-4) var(--sp-5);min-width:0}.alert-level{flex:0 0 auto;font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px}.alert-main{display:flex;flex-direction:column;gap:3px;min-width:0}.alert-main strong{font-size:14px}.alert-when{font-size:13px;color:var(--muted)}.alert-detail{font-size:13px;color:var(--muted);overflow-wrap:anywhere;line-height:1.6}.alert-blue{background:color-mix(in srgb,#3b82f6 10%,var(--surface))}.alert-blue .alert-level{background:#3b82f633;color:#60a5fa}.alert-yellow{background:color-mix(in srgb,#eab308 10%,var(--surface))}.alert-yellow .alert-level{background:#eab30838;color:#facc15}.alert-orange{background:color-mix(in srgb,#f97316 10%,var(--surface))}.alert-orange .alert-level{background:#f9731633;color:#fb923c}.alert-red{background:color-mix(in srgb,#ef4444 10%,var(--surface))}.alert-red .alert-level{background:#ef444433;color:#f87171}:root[data-theme=light] .alert-blue .alert-level{color:#1d4ed8}:root[data-theme=light] .alert-yellow .alert-level{color:#854d0e}:root[data-theme=light] .alert-orange .alert-level{color:#9a3412}:root[data-theme=light] .alert-red .alert-level{color:#b91c1c}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(132px,1fr));gap:var(--sp-3)}.stat{background:var(--surface);border-radius:var(--radius-lg);padding:var(--sp-4) var(--sp-5);display:flex;flex-direction:column;gap:3px;min-width:0}.stat-label{font-size:12px;color:var(--muted)}.stat-value{font-size:20px;font-weight:700;overflow-wrap:anywhere;font-variant-numeric:tabular-nums;display:flex;align-items:center;gap:6px}.stat-value .icon{width:18px;height:18px}.stat-sub{font-size:12px;color:var(--faint)}.stat-value.up{color:#fb923c}.stat-value.down{color:var(--accent-strong)}.chart-box{position:relative;background:var(--surface);border-radius:var(--radius-lg);padding:var(--sp-4) var(--sp-3)}.chart{display:block;width:100%;height:auto}.chart-interactive{cursor:crosshair}.chart-empty{color:var(--muted);font-size:14px;margin:var(--sp-5) 0;text-align:center}.chart-line{fill:none;stroke:var(--accent);stroke-width:2.5;stroke-linejoin:round;stroke-linecap:round}.chart-dot{fill:var(--accent);transition:r .1s}.chart-dot.emph{fill:var(--warn)}.chart-dot.active{fill:var(--ink);stroke:var(--accent);stroke-width:2}.chart-grid{stroke:var(--border);stroke-width:1}.chart-tick{fill:var(--muted);font-size:11px}.chart-tick.strong{fill:var(--ink);font-weight:600}.chart-anno{font-size:12px;font-weight:700}.chart-anno.hi{fill:var(--warn)}.chart-anno.lo{fill:var(--accent)}.range-bar{fill:var(--accent);opacity:.9}.chart-hit{fill:transparent;pointer-events:all}.chart-hit.active{fill:color-mix(in srgb,var(--accent) 12%,transparent)}.range-row{cursor:pointer}.range-row-bg{fill:transparent;pointer-events:all}.range-row:hover .range-row-bg{fill:color-mix(in srgb,var(--accent) 8%,transparent)}.range-row.active .range-row-bg{fill:color-mix(in srgb,var(--accent) 14%,transparent)}.range-row.active .range-bar{opacity:1}.chart-tooltip{position:absolute;transform:translate(-50%,-100%);background:var(--surface-2);color:var(--ink);border:1px solid var(--accent);border-radius:10px;padding:8px 12px;font-size:12px;line-height:1.5;pointer-events:none;opacity:0;transition:opacity .12s;max-width:280px;box-shadow:var(--shadow-float);z-index:5;white-space:normal}.chart-tooltip.show{opacity:1}.index-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:var(--sp-3)}.index-card{background:var(--surface);border-radius:var(--radius-lg);padding:var(--sp-4) var(--sp-5);min-width:0}.index-head{display:flex;justify-content:space-between;align-items:center;gap:var(--sp-2)}.index-name{font-size:14px;font-weight:700}.index-level{font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px;white-space:nowrap}.index-stars{display:inline-flex;gap:3px;margin:10px 0;font-size:0;line-height:0}.index-star{width:8px;height:8px;border-radius:50%;display:inline-block}.index-star.on{background:currentColor}.index-star.off{background:color-mix(in srgb,currentColor 30%,transparent)}.index-advice{color:var(--muted);font-size:14px;margin:0;line-height:1.7;max-width:44ch}.lv1{color:#f87171}.lv2{color:#fb923c}.lv3{color:var(--warn)}.lv4,.lv5{color:var(--ok)}.index-level.lv1,.index-level.lv2{background:#f8717124}.index-level.lv3{background:#fbbf2429}.index-level.lv4,.index-level.lv5{background:#4ade8029}.forecast-list{list-style:none;margin:var(--sp-4) 0 0;padding:0;display:flex;flex-direction:column;gap:var(--sp-2)}.forecast-row{background:var(--surface);border-radius:var(--radius);overflow:hidden;transition:background-color .15s}.forecast-row.active{background:color-mix(in srgb,var(--accent) 10%,var(--surface))}.forecast-btn{width:100%;display:grid;grid-template-columns:56px 64px minmax(90px,1fr) auto auto auto;gap:var(--sp-3);align-items:center;padding:var(--sp-3) var(--sp-5);background:transparent;border:none;color:var(--ink);font-family:inherit;font-size:14px;text-align:left;cursor:pointer;transition:background-color .15s}.forecast-btn:hover{background:var(--surface-2)}.forecast-btn .date{font-weight:600}.forecast-btn .cond{color:var(--accent-strong);display:flex;align-items:center;gap:6px;min-width:0}.forecast-btn .cond .icon{width:18px;height:18px}.forecast-btn .meta{color:var(--muted);font-size:13px;white-space:nowrap}.forecast-btn .range{font-weight:600;white-space:nowrap;font-variant-numeric:tabular-nums}.forecast-btn .range .low{color:var(--muted)}.toggle-btn{background:var(--surface-2);color:var(--ink);border:none;border-radius:var(--radius-sm);padding:8px 14px;font-size:13px;font-weight:600;font-family:inherit;cursor:pointer;transition:background-color .15s}.toggle-btn:hover{background:var(--surface-3)}.compare-picker{color:var(--muted);font-size:13px;display:inline-flex;align-items:center;gap:var(--sp-2)}.compare-picker select{background:var(--surface);color:var(--ink);border:1px solid var(--border);border-radius:var(--radius-sm);padding:7px 12px;font-size:14px;font-family:inherit;max-width:160px}.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin-bottom:var(--sp-3)}.compare-table{width:100%;min-width:420px;border-collapse:collapse;background:var(--surface);border-radius:var(--radius);overflow:hidden;font-size:14px}.compare-table th,.compare-table td{padding:12px var(--sp-3);text-align:center;border-bottom:1px solid var(--border)}.compare-table tr:last-child th,.compare-table tr:last-child td{border-bottom:none}.compare-table th{background:var(--surface-2);font-size:13px;font-weight:600}.compare-table .row-label{color:var(--muted);text-align:left}.compare-table .win{color:var(--ok);font-weight:700}.compare-table .win .icon{width:14px;height:14px;vertical-align:-.15em}.compare-summary{color:var(--muted);font-size:15px;margin:0 0 var(--sp-4);max-width:60ch;line-height:1.6}.diff-table .diff.up{color:#fb923c;font-weight:700}.diff-table .diff.down{color:var(--accent);font-weight:700}.footer{display:flex;flex-wrap:wrap;gap:var(--sp-3);align-items:center;justify-content:space-between;color:var(--faint);font-size:13px;padding-top:var(--sp-6)}.footer p{margin:0}.toast-stack{position:fixed;right:var(--sp-4);bottom:var(--sp-4);display:flex;flex-direction:column;gap:var(--sp-2);z-index:60;max-width:min(340px,calc(100vw - 32px))}.toast{background:var(--surface-2);color:var(--ink);border-left:4px solid var(--accent);border-radius:var(--radius);padding:12px var(--sp-4);font-size:14px;box-shadow:var(--shadow-float);opacity:0;transform:translateY(8px);transition:opacity .2s,transform .2s;cursor:pointer}.toast-in{opacity:1;transform:translateY(0)}.toast-info{border-left-color:var(--accent)}.toast-success{border-left-color:var(--ok)}.toast-error{border-left-color:var(--danger)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:var(--overlay);display:flex;align-items:center;justify-content:center;padding:var(--sp-4);z-index:70;overflow-y:auto}.modal{background:var(--surface);border-radius:var(--radius-lg);padding:var(--sp-6);width:min(520px,100%);max-height:calc(100vh - 32px);overflow-y:auto;box-shadow:var(--shadow-modal)}.modal-title{margin:0 0 var(--sp-2);font-size:18px}.modal-body{margin:0 0 var(--sp-4);color:var(--muted);font-size:14px;line-height:1.6}.modal-actions{display:flex;justify-content:flex-end;gap:var(--sp-2);margin-top:var(--sp-5);flex-wrap:wrap}.field{display:flex;flex-direction:column;gap:4px;margin-bottom:var(--sp-4);min-width:0}.field label{font-size:13px;font-weight:600}.field input,.field 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