:root{--ink:#16181d;--muted:#6d7179;--line:#e6e8eb;--soft:#f5f6f7;--surface:#fff;--primary:#17191e;--primary-hover:#30333a;--blue:#2167d5;--blue-soft:#edf4ff;--green:#16845b;--green-soft:#eaf7f1;--amber:#b46705;--amber-soft:#fff5e5;--red:#bd3535;--red-soft:#fff0f0;--radius:16px;--shadow:0 16px 45px #17191e0f}*{box-sizing:border-box}html{background:var(--soft);color:var(--ink);-webkit-font-smoothing:antialiased;-webkit-text-size-adjust:100%;text-rendering:optimizelegibility}body{background:var(--soft);min-height:100vh;color:var(--ink);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;overflow-x:hidden}button,input,textarea,select{color:inherit;font:inherit}button{cursor:pointer;touch-action:manipulation;-webkit-appearance:none;-webkit-tap-highlight-color:transparent;border:0}button:disabled{cursor:not-allowed;opacity:.55}:is(button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible){outline-offset:2px;outline:3px solid #2167d533}h1,h2,h3,p{margin-top:0}.eyebrow{color:#8a8e96;letter-spacing:.16em;text-transform:uppercase;margin:0 0 8px;font-size:11px;font-weight:750}.button{border:1px solid #0000;border-radius:11px;justify-content:center;align-items:center;gap:8px;min-height:44px;padding:0 18px;font-size:14px;font-weight:680;transition:background .15s,border-color .15s,transform .15s;display:inline-flex}.button:active:not(:disabled){transform:translateY(1px)}.button.primary{background:var(--primary);color:#fff}.button.primary:hover:not(:disabled){background:var(--primary-hover)}.button.secondary{color:#2f333a;background:#fff;border-color:#d8dbe0}.button.secondary:hover:not(:disabled),.button.ghost:hover:not(:disabled){background:#f8f9fa;border-color:#babfc7}.button.ghost{border-color:var(--line);background:0 0;min-height:36px}.button.small{min-height:34px;padding:0 12px;font-size:13px}.button.wide{width:100%}.text-button{color:var(--blue);background:0 0;padding:4px 0;font-size:13px;font-weight:650}.text-button:hover{color:#124a9e}.text-button.muted{color:var(--muted)}.client-shell{width:100%;max-width:720px;min-height:100vh;min-height:100dvh;padding:26px 20px 42px;padding-bottom:max(42px, env(safe-area-inset-bottom));margin:0 auto}.client-shell .button{min-height:50px;font-size:15px}.client-header{justify-content:space-between;align-items:flex-end;gap:16px;min-height:68px;margin-bottom:20px;display:flex}.client-header h1{letter-spacing:-.04em;margin:0;font-size:clamp(25px,6vw,34px);font-weight:760}.client-state{border-radius:999px;flex:none;align-items:center;gap:7px;min-height:31px;padding:0 11px;font-size:12px;font-weight:650;display:inline-flex}.client-state span{border-radius:50%;width:6px;height:6px}.client-state.is-reserved{background:var(--amber-soft);color:#92550b}.client-state.is-reserved span{background:#d88318}.client-state.is-claimed{background:var(--green-soft);color:#116846}.client-state.is-claimed span{background:var(--green)}.client-message{border:1px solid var(--line);border-radius:var(--radius);text-align:center;min-height:410px;box-shadow:var(--shadow);background:#fff;flex-direction:column;justify-content:center;align-items:center;padding:64px 28px;display:flex}.client-message h2{margin:22px 0 8px;font-size:20px}.client-message p{max-width:360px;color:var(--muted);margin:0 0 22px;font-size:14px;line-height:1.7}.message-icon,.loading-dot{color:#858991;background:#f0f1f3;border-radius:50%;place-items:center;width:48px;height:48px;font-size:22px;display:grid}.message-icon.error{background:var(--red-soft);color:var(--red)}.loading-dot{position:relative}.loading-dot:after{background:var(--ink);content:"";border-radius:50%;width:12px;height:12px;animation:1.2s ease-in-out infinite pulse}@keyframes pulse{0%,to{opacity:.45;transform:scale(.7)}50%{opacity:1;transform:scale(1)}}.material-stack{gap:14px;display:grid}.material-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);padding:22px;box-shadow:0 7px 24px #17191e09}.section-heading{justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px;display:flex}.section-heading>div{align-items:center;gap:10px;display:flex}.section-heading h2{margin:0;font-size:17px;font-weight:720}.section-index{color:#777b83;background:#f1f2f4;border-radius:8px;place-items:center;width:28px;height:28px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:10px;font-weight:700;display:grid}.section-meta{color:var(--muted);font-size:12px}.image-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-bottom:18px;display:grid}.image-item{min-width:0}.image-preview{background:#eceef0;border-radius:12px;width:100%;height:0;padding:0 0 125%;position:relative;overflow:hidden}.image-preview img{object-fit:cover;width:100%;height:100%;transition:transform .18s;display:block;position:absolute;inset:0}@supports (aspect-ratio:4 / 5){.image-preview{aspect-ratio:4/5;height:auto;padding:0}}@media (hover:hover) and (pointer:fine){.image-preview:hover img{transform:scale(1.015)}}.image-number,.image-expand{color:#fff;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#111317b8;border-radius:7px;position:absolute}.image-number{padding:4px 7px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:10px;top:9px;left:9px}.image-expand{padding:5px 8px;font-size:10px;bottom:9px;right:9px}.image-download{border:1px solid var(--line);color:#51555d;background:#fff;border-radius:9px;width:100%;min-height:44px;margin-top:8px;padding:9px;font-size:12px;font-weight:650}.image-download:hover{background:var(--soft)}.material-title{color:#202228;overflow-wrap:break-word;word-break:break-word;-webkit-user-select:text;user-select:text;margin:0 0 22px;font-size:19px;font-weight:680;line-height:1.65}.material-body{color:#31343a;white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-word;-webkit-user-select:text;user-select:text;background:#f7f8f9;border-radius:12px;margin-bottom:22px;padding:18px;font-size:15px;line-height:1.9}.tag-notice{background:var(--blue-soft);color:#34577f;border:1px solid #dce7f8;border-radius:12px;align-items:flex-start;gap:10px;margin-bottom:18px;padding:13px 14px;display:flex}.tag-notice>span{color:#2861a5;background:#d6e6ff;border-radius:50%;flex:0 0 20px;place-items:center;width:20px;height:20px;font-family:Georgia,serif;font-size:12px;font-weight:700;display:grid}.tag-notice p{margin:0;font-size:12px;line-height:1.7}.tag-list{flex-wrap:wrap;gap:9px;display:flex}.tag-list span{color:#32363d;background:#fff;border:1px solid #dfe2e6;border-radius:999px;padding:8px 12px;font-size:13px;font-weight:600}.material-footer{color:#90949b;justify-content:space-between;gap:12px;padding:8px 4px 0;font-size:11px;display:flex}.empty-inline{color:var(--muted);margin:0;font-size:13px;line-height:1.7}.toast{z-index:100;bottom:26px;left:50%;bottom:max(26px, env(safe-area-inset-bottom));color:#fff;background:#16181df0;border-radius:999px;padding:11px 18px;font-size:13px;font-weight:650;position:fixed;transform:translate(-50%);box-shadow:0 10px 30px #00000038}.lightbox{z-index:90;place-items:center;padding:62px 20px 28px;display:grid;position:fixed;inset:0}.lightbox-backdrop{background:#0a0b0ee6;position:absolute;inset:0}.lightbox>img{z-index:1;object-fit:contain;border-radius:9px;max-width:100%;max-height:calc(100vh - 100px);box-shadow:0 20px 70px #00000073}.lightbox-close{z-index:2;top:17px;top:max(17px, env(safe-area-inset-top));color:#fff;background:#ffffff24;border-radius:999px;padding:9px 14px;font-size:12px;position:absolute;right:20px}.admin-login-shell{background:#f3f4f6;place-items:center;min-height:100vh;padding:24px;display:grid}.admin-login-card{border:1px solid var(--line);width:min(100%,400px);box-shadow:var(--shadow);background:#fff;border-radius:20px;padding:38px}.admin-login-card h1{letter-spacing:-.04em;margin:0 0 8px;font-size:28px}.login-copy{color:var(--muted);margin-bottom:28px;font-size:14px}.admin-login-card form{gap:12px;display:grid}.admin-mark{background:var(--ink);color:#fff;letter-spacing:-.04em;border-radius:13px;place-items:center;width:48px;height:48px;margin-bottom:24px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;font-weight:800;display:grid}.form-error{color:var(--red);margin:-2px 0 2px;font-size:12px}.admin-boot{color:var(--muted);font-size:14px}.admin-shell{background:#f3f4f6;min-height:100vh}.admin-header{border-bottom:1px solid var(--line);z-index:30;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#fffffff0;justify-content:space-between;align-items:center;height:66px;padding:0 max(24px,50vw - 620px);display:flex;position:sticky;top:0}.admin-brand{align-items:center;gap:11px;display:flex}.admin-brand>div:last-child{gap:1px;display:grid}.admin-brand strong{font-size:13px}.admin-brand span{color:var(--muted);font-size:11px}.small-mark{border-radius:9px;width:34px;height:34px;margin:0;font-size:10px}.admin-content{width:calc(100% - 48px);max-width:1240px;margin:0 auto;padding:42px 0 70px}.narrow-content,.editor-content{max-width:1050px}.dashboard-heading,.editor-heading{justify-content:space-between;align-items:flex-end;gap:24px;margin-bottom:28px;display:flex}.dashboard-heading h1,.editor-heading h1{letter-spacing:-.045em;margin:0 0 8px;font-size:32px}.dashboard-heading p:last-child,.editor-heading p:last-child{color:var(--muted);margin:0;font-size:13px}.heading-actions,.editor-actions>div{gap:10px;display:flex}.stats-row{grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:18px;display:grid}.stat-item{border:1px solid var(--line);background:#fff;border-radius:14px;justify-content:space-between;align-items:flex-end;min-height:84px;padding:16px 18px;display:flex}.stat-item span{color:var(--muted);font-size:12px}.stat-item strong{letter-spacing:-.04em;font-size:28px;line-height:1}.stat-available strong{color:var(--green)}.stat-reserved strong{color:var(--amber)}.stat-claimed strong{color:#59606a}.admin-panel{border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:0 5px 22px #17191e08}.table-panel{overflow:hidden}.table-toolbar{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:18px;min-height:76px;padding:14px 18px;display:flex}.table-toolbar>div:first-child{align-items:baseline;gap:9px;display:flex}.table-toolbar h2{margin:0;font-size:16px}.table-toolbar>div span{color:var(--muted);font-size:11px}.filter-label{align-items:center;gap:9px;display:flex}.filter-label>span{color:var(--muted);font-size:11px}.table-scroll{overflow-x:auto}.material-table{border-collapse:collapse;table-layout:fixed;width:100%;min-width:920px}.material-table th,.material-table td{text-align:left;vertical-align:middle;border-bottom:1px solid #eef0f2;padding:14px 16px}.material-table th{color:#83878f;letter-spacing:.07em;background:#fafbfb;font-size:10px;font-weight:700}.material-table td{height:68px;font-size:12px}.material-table th:first-child{width:110px}.material-table th:nth-child(2){width:165px}.material-table th:nth-child(3){width:auto}.material-table th:nth-child(4){width:100px}.material-table th:nth-child(5){width:115px}.material-table th:nth-child(6){width:135px}.material-table tbody tr:hover{background:#fcfcfd}.code-cell{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px}.topic-cell{gap:3px;min-width:0;display:grid}.topic-cell b{color:#737780;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:9px}.title-cell{color:#292c32;text-overflow:ellipsis;white-space:nowrap;display:block;overflow:hidden}.status-badge{border-radius:999px;align-items:center;min-height:25px;padding:0 9px;font-size:10px;font-weight:680;display:inline-flex}.status-available{background:var(--green-soft);color:var(--green)}.status-reserved{background:var(--amber-soft);color:var(--amber)}.status-claimed{color:#5b6068;background:#eff1f3}.time-cell{color:#747881;font-variant-numeric:tabular-nums}.row-actions{gap:12px;display:flex}.text-button.release{color:var(--amber)}.table-empty,.table-loading{min-height:210px;color:var(--muted);flex-direction:column;justify-content:center;align-items:center;gap:8px;font-size:12px;display:flex}.table-empty strong{color:#454950;font-size:14px}.table-message,.editor-message{color:#885510;background:#fff9ed;border-bottom:1px solid #f0e0bf;padding:10px 18px;font-size:12px}.page-toolbar{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.toolbar-context{color:var(--muted);font-size:12px}.split-layout{grid-template-columns:minmax(300px,.85fr) minmax(360px,1.15fr);align-items:start;gap:16px;display:grid}.form-panel,.split-layout>.admin-panel{padding:24px}.panel-heading{justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:22px;display:flex}.panel-heading h2{margin:0;font-size:18px}.count-badge{color:#62666e;background:#f0f2f4;border-radius:999px;place-items:center;min-width:28px;height:28px;font-size:11px;font-weight:700;display:grid}.form-stack,.form-grid{gap:18px;display:grid}.form-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.full-span{grid-column:1/-1}.field-group{gap:8px;display:grid}.field-label{color:#3d4148;font-size:12px;font-weight:650}.field-group small{color:#8a8e95;font-size:10px;line-height:1.5}.text-input,.select-input,.textarea-input{background:#fff;border:1px solid #dcdfe3;border-radius:10px;width:100%;transition:border-color .15s,box-shadow .15s}.text-input,.select-input{min-height:44px;padding:0 12px;font-size:13px}.textarea-input{resize:vertical;min-height:130px;padding:12px;font-size:13px;line-height:1.7}.text-input:focus,.select-input:focus,.textarea-input:focus{border-color:#8baad8;box-shadow:0 0 0 3px #2167d514}.text-input:disabled,.select-input:disabled{color:#858991;background:#f3f4f5}.uppercase{text-transform:uppercase;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.select-input.compact{width:230px;min-height:38px;font-size:12px}.form-message{color:#8d5c17;margin:0;font-size:12px;line-height:1.6}.topic-list{display:grid}.topic-row{border-top:1px solid #eef0f2;grid-template-columns:54px 1fr auto;align-items:center;gap:12px;min-height:66px;display:grid}.topic-row:first-child{border-top:0}.topic-code{color:#565b64;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:11px;font-weight:700}.topic-row>div{gap:3px;min-width:0;display:grid}.topic-row strong{text-overflow:ellipsis;white-space:nowrap;font-size:13px;overflow:hidden}.topic-row small{color:var(--muted);font-size:10px}.editor-heading{align-items:center}.editor-section{margin-bottom:14px;padding:26px}.editor-section-title{align-items:flex-start;gap:12px;margin-bottom:24px;display:flex}.editor-section-title>span{color:#777b83;background:#f0f2f4;border-radius:8px;flex:0 0 30px;place-items:center;width:30px;height:30px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:10px;font-weight:700;display:grid}.editor-section-title h2{margin:4px 0 3px;font-size:16px}.editor-section-title p{color:var(--muted);margin:0;font-size:11px}.body-input{min-height:300px}.tags-input{min-height:180px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.upload-zone input{opacity:0;width:1px;height:1px;position:absolute;overflow:hidden}.upload-zone label{cursor:pointer;background:#fafbfb;border:1px dashed #cbd0d7;border-radius:12px;flex-direction:column;justify-content:center;align-items:center;gap:6px;min-height:104px;transition:border-color .15s,background .15s;display:flex}.upload-zone label:hover{background:#f7faff;border-color:#8fa7c9}.upload-zone strong{color:#363a41;font-size:13px}.upload-zone span{color:var(--muted);font-size:10px}.editor-image-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:18px;display:grid}.editor-image-card{border:1px solid var(--line);background:#fff;border-radius:11px;min-width:0;overflow:hidden}.editor-image-preview{aspect-ratio:4/5;background:#eceef0;position:relative;overflow:hidden}.editor-image-preview img{object-fit:cover;width:100%;height:100%;display:block}.editor-image-preview span{color:#fff;background:#111317bf;border-radius:6px;padding:3px 6px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:9px;position:absolute;top:7px;left:7px}.editor-image-info{gap:2px;padding:9px 10px 7px;display:grid}.editor-image-info strong{text-overflow:ellipsis;white-space:nowrap;font-size:10px;overflow:hidden}.editor-image-info small{color:var(--muted);font-size:9px}.image-actions{border-top:1px solid var(--line);grid-template-columns:34px 34px 1fr;display:grid}.image-actions button{border-right:1px solid var(--line);color:#5d626b;background:#fff;min-height:32px;font-size:11px}.image-actions button:last-child{border-right:0}.image-actions button:hover:not(:disabled){background:#f7f8f9}.image-actions .danger-text{color:var(--red)}.image-empty{text-align:center;background:#f7f8f9;border-radius:10px;margin-top:18px;padding:18px}.editor-message{border:1px solid #f0e0bf;border-radius:10px;margin:16px 0}.editor-actions{justify-content:space-between;align-items:center;gap:16px;margin-top:20px;display:flex}.loading-panel{color:var(--muted);text-align:center;padding:80px 24px;font-size:13px}@media (max-width:820px){.admin-header{padding:0 20px}.stats-row{grid-template-columns:repeat(2,1fr)}.split-layout{grid-template-columns:1fr}.editor-image-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}@media (max-width:640px){.client-shell{padding:18px 12px 34px;padding-bottom:max(34px, env(safe-area-inset-bottom))}.client-header{align-items:center}.material-card{border-radius:14px;padding:17px}.image-grid{gap:9px}.section-heading{margin-bottom:16px}.material-title{margin-bottom:18px;font-size:18px}.material-body{margin-bottom:18px;padding:15px;font-size:15px;line-height:1.85}.tag-notice{padding:12px}.material-footer{flex-direction:column;gap:5px}.admin-content{width:calc(100% - 28px);padding-top:28px}.dashboard-heading,.editor-heading{flex-direction:column;align-items:flex-start}.dashboard-heading h1,.editor-heading h1{font-size:28px}.heading-actions{width:100%}.heading-actions .button{flex:1}.stat-item{min-height:76px;padding:14px}.stat-item strong{font-size:24px}.table-toolbar{flex-direction:column;align-items:flex-start}.filter-label,.select-input.compact{width:100%}.form-grid{grid-template-columns:1fr}.full-span{grid-column:auto}.editor-section{padding:20px 16px}.editor-image-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.upload-zone span{text-align:center;max-width:250px;padding:0 12px;line-height:1.5}.editor-actions{flex-direction:column-reverse;align-items:stretch}.editor-actions>.button,.editor-actions>div,.editor-actions>div .button{width:100%}.editor-actions>div{flex-direction:column-reverse}.admin-login-shell{padding:14px}.admin-login-card{padding:28px 22px}}@media (max-width:360px){.client-header{flex-direction:column;align-items:flex-start;gap:11px}.client-header h1{font-size:26px}.client-state{min-height:30px}.material-card{padding:15px}.image-grid{gap:8px}.image-number{top:7px;left:7px}.image-expand{bottom:7px;right:7px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}