.topbar .brand,.topbar .back-link{color:#fff;text-decoration:none}.topbar .back-link{border:1px solid #9ab5c0;border-radius:4px;padding:8px 12px;font-size:.88rem}.topbar .back-link:hover{background:#ffffff14}
.region-shell{max-width:1520px;margin:auto;padding:30px clamp(16px,3vw,44px) 54px}.region-intro{display:flex;align-items:end;justify-content:space-between;gap:30px;margin:0 0 22px}.region-kicker{font-size:.78rem;font-weight:700;letter-spacing:.08em;color:#aa4d34}.region-intro h1{font-size:2rem;margin:7px 0 8px}.region-intro p{margin:0;color:#55717c;line-height:1.65}.region-intro .edition-context{max-width:330px;padding-left:14px;border-left:3px solid #b8d2dc;font-size:.82rem}
.region-tabs{display:flex;gap:5px;overflow-x:auto;border-bottom:1px solid var(--line);margin-bottom:16px;scrollbar-width:thin}.region-tabs button{flex:none;border:0;border-bottom:3px solid transparent;background:transparent;color:#5b7782;padding:11px 18px;font-weight:700;white-space:nowrap}.region-tabs button[aria-current="true"]{color:var(--ink);border-bottom-color:var(--accent)}.region-tabs button:hover{background:#eaf2f5}
.study-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(270px,340px);gap:16px;align-items:start}.plate-panel,.selection-card,.study-list-card{background:#fff;border:1px solid var(--line);border-radius:7px}.plate-panel{min-width:0;overflow:hidden}.plate-toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 14px;border-bottom:1px solid var(--line)}.plate-tabs{display:flex;gap:6px;min-width:0;overflow-x:auto;scrollbar-width:thin}.plate-tabs button{flex:none;padding:7px 11px;border:1px solid #cadce2;border-radius:4px;background:#fff;color:#3f6270;font-size:.84rem;white-space:nowrap}.plate-tabs button[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:#fff}.plate-tabs button:hover:not([aria-pressed="true"]){background:#eaf3f6}.zoom-tools{display:flex;align-items:center;gap:4px;flex:none}.zoom-tools button{min-width:32px;height:32px;border:1px solid #cadce2;border-radius:4px;background:#fff;color:var(--ink);font-size:.95rem}.zoom-tools button:hover{background:#eaf3f6}.zoom-tools span{min-width:43px;text-align:center;font-size:.76rem;color:#607d89}
.plate-scroll{height:min(70vh,780px);overflow:auto;background:#f8fbfc;scrollbar-width:thin;overscroll-behavior:contain}.plate-canvas{position:relative;width:100%;min-width:820px;line-height:0}.plate-canvas img{display:block;width:100%;height:auto}.plate-hotspot{position:absolute;display:block;margin:0;padding:0;border:1px solid transparent;border-radius:3px;background:transparent;color:transparent;cursor:pointer;line-height:1}.plate-hotspot:hover,.plate-hotspot:focus-visible,.plate-hotspot.selected{background:#a8dae575;border-color:#156c84;box-shadow:0 0 0 2px #ffffffb3;outline:none}.plate-hotspot.selected{background:#e89e8059;border-color:#ad4e36}.plate-hotspot:focus-visible{outline:3px solid #126e8b;outline-offset:2px}.plate-footer{padding:13px 16px;border-top:1px solid var(--line)}.plate-footer strong{color:var(--ink);font-size:.96rem}.plate-footer span{display:block;margin-top:3px;color:#607d89;font-size:.8rem}.plate-footer p{margin:8px 0 0;color:#607d89;font-size:.8rem;line-height:1.5}
.study-sidebar{display:grid;gap:12px;min-width:0}.selection-card{padding:18px;min-height:195px;border-top:3px solid var(--accent)}.selection-empty{margin:34px 0;color:#5f7a85;line-height:1.7}.selection-card .eyebrow{display:block}.selection-card h2{font-family:"Noto Serif CJK SC","SimSun",serif;color:var(--ink);font-size:1.65rem;line-height:1.3;margin:9px 0}.selection-card h2 small{font:600 .87rem Arial,sans-serif;color:#64808a;margin-left:8px}.selection-card .selected-location{font-size:1rem;line-height:1.75;margin:12px 0;color:#273f48}.selection-card .source{line-height:1.5}.selection-card .revision-note{font-size:.8rem;color:#99452e;margin:10px 0}.selection-card a{display:inline-flex;margin-top:14px;border-radius:4px;padding:9px 13px;background:var(--ink);color:#fff;text-decoration:none;font-size:.87rem;font-weight:700}.selection-card a:hover{background:#24556c}
.study-list-card{overflow:hidden}.study-list-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:16px;border-bottom:1px solid var(--line)}.study-list-head h2{margin:0;font-size:1rem;color:var(--ink)}.study-list-head span{font-size:.8rem;color:#66828d}.study-filters{display:grid;grid-template-columns:1fr 1fr;gap:5px 9px;padding:12px 14px;border-bottom:1px solid var(--line);background:#f8fbfc}.study-filters label{font-size:.76rem;color:#5c7782}.study-filters select,.study-filters input{min-width:0;width:100%;height:36px;padding:0 8px;border:1px solid #bbd0d9;border-radius:4px;background:#fff;color:var(--ink);font-size:.84rem}.study-point-list{max-height:min(58vh,570px);overflow:auto}.study-point-list button{display:flex;width:100%;justify-content:space-between;gap:12px;padding:10px 15px;text-align:left;border:0;border-bottom:1px solid #edf2f4;background:#fff;color:#254753;font-size:.9rem}.study-point-list button:hover{background:#eef5f7}.study-point-list button.selected{background:#fff1eb;color:#90412d;font-weight:700}.study-point-list small{color:#65808a;font-size:.77rem;flex:none}.study-point-list .empty{margin:10px;padding:18px;font-size:.84rem}
@media(max-width:1020px){.study-layout{grid-template-columns:minmax(0,1fr) 275px}.plate-toolbar{flex-wrap:wrap}.zoom-tools{margin-left:auto}}
@media(max-width:760px){.region-shell{padding:20px 12px 38px}.region-intro{display:block;margin-bottom:13px}.region-intro h1{font-size:1.7rem}.region-intro .edition-context{max-width:none;margin-top:12px;font-size:.78rem}.region-tabs button{padding:11px 13px}.study-layout{display:block}.plate-panel{margin-bottom:12px}.plate-scroll{height:min(60vh,550px)}.plate-canvas{min-width:960px}.plate-toolbar{padding:8px}.plate-tabs{width:100%}.zoom-tools{width:100%;justify-content:flex-end}.study-sidebar{display:block}.selection-card{min-height:0;margin-bottom:12px}.study-point-list{max-height:330px}.topbar .back-link{font-size:.78rem;padding:7px 8px}}