:root{color-scheme:light;--bg:#f7f9f8;--paper:#fff;--ink:#17241c;--muted:#66736b;--line:#dce4df;--accent:#2e6547;--soft:#e9f1ec;--radius:12px;--controls-height:140px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-size:16px;line-height:1.65}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button,a,summary{touch-action:manipulation}a{color:var(--accent);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}button{cursor:pointer}button:disabled{cursor:default}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,video:focus-visible{outline:3px solid #2e6547;outline-offset:4px}button:active:not(:disabled){transform:translateY(1px)}[hidden]{display:none!important}.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:fixed;left:20px;top:12px;z-index:100;background:var(--ink);color:white;padding:10px 18px;border-radius:var(--radius);transform:translateY(-180%)}.skip-link:focus{transform:translateY(0)}.page-shell{max-width:1248px;margin:0 auto;padding:0 32px}.site-header{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line);font-size:14px}.site-name{font-weight:650;color:var(--ink);text-decoration:none}.header-links{display:flex;gap:24px;flex-wrap:wrap}.header-links a{text-decoration:none}.intro{padding:27px 0 25px;max-width:960px}.intro h1{font-size:clamp(32px,3.6vw,46px);font-weight:650;letter-spacing:-.04em;line-height:1.2;margin:0 0 12px}.intro p{color:var(--muted);margin:0;font-size:16px}.intro p+p{margin-top:7px}.brief-facts{font-size:14px!important}.collection-controls{position:sticky;top:0;z-index:20;background:var(--bg);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:14px 0 12px}.filter-row{display:flex;align-items:center;justify-content:space-between;gap:20px}.category-buttons{display:flex;align-items:center;gap:5px;flex-wrap:wrap}.category-buttons button{border:0;background:transparent;color:var(--muted);border-radius:9px;padding:9px 12px;min-height:42px;white-space:nowrap;font-size:14px}.category-buttons button[aria-pressed=true]{color:var(--ink);background:var(--soft);font-weight:650}.category-count{margin-left:5px;color:var(--muted);font-variant-numeric:tabular-nums}.search-field{display:flex;align-items:center;gap:8px;flex:0 1 250px;position:relative}.search-field label{font-size:14px;color:var(--muted);white-space:nowrap}.search-field input{border:1px solid var(--line);background:var(--paper);border-radius:9px;padding:9px 11px;width:100%;min-width:0;line-height:1.3;font-size:14px;color:var(--ink);height:42px}.search-field input::placeholder{color:#66736b}.mobile-category{display:none}.pagination-row{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:12px}.result-count{font-size:13px;color:var(--muted);margin:0;font-variant-numeric:tabular-nums}.pagination{display:flex;align-items:center;gap:9px}.pagination button,.pagination select{border:1px solid var(--line);border-radius:9px;background:var(--paper);color:var(--ink);min-height:38px;padding:5px 12px;font-size:13px}.pagination select{padding-right:25px;max-width:195px}.pagination button:disabled{color:#8e9892;background:#f1f4f2;border-color:#e6ebe8}.collection-main{padding:25px 0 45px;scroll-margin-top:calc(var(--controls-height) + 18px)}.collection-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:26px;align-items:start}.video-card{min-width:0;scroll-margin-top:calc(var(--controls-height) + 18px)}.card-heading{display:grid;grid-template-columns:27px minmax(0,1fr);gap:9px;min-height:105px;padding:0 0 15px;align-items:start}.video-number{font-variant-numeric:tabular-nums;color:var(--muted);font-size:14px;padding-top:3px}.card-heading h2{font-size:18px;line-height:1.42;margin:0;font-weight:650;letter-spacing:-.015em}.title-en{font-size:12px;color:var(--muted);line-height:1.45;margin:6px 0 0}.player-wrap{position:relative;background:#edf2ef;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}.player-wrap video{width:100%;height:auto;aspect-ratio:9/16;object-fit:contain;display:block;background:#edf2ef}.playback-error{padding:12px 15px;color:#863b36;margin:0;font-size:14px;background:#fff4f2}.card-meta{display:flex;align-items:center;justify-content:space-between;gap:8px;flex-wrap:wrap;font-size:12px;color:var(--muted);margin:12px 0 9px;font-variant-numeric:tabular-nums}.download-link{font-size:13px;font-weight:600;white-space:nowrap;text-decoration:none;padding:3px 0}.card-style{font-size:13px;font-weight:600;margin:0 0 7px;color:var(--accent)}.card-description{font-size:14px;line-height:1.75;margin:0 0 13px;color:#45554a}.method-details{font-size:13px;line-height:1.75;border-top:1px solid var(--line);padding-top:10px}.method-details summary{cursor:pointer;color:var(--ink);font-weight:550;min-height:30px}.method-details summary::marker{color:var(--muted)}.method-details p{color:#506056;margin:10px 0}.method-details dl{margin:12px 0 0}.method-details dt{font-weight:600;margin-top:12px;color:var(--ink)}.method-details dd{margin:4px 0 0;color:#506056;overflow-wrap:anywhere}.method-details .spec{color:var(--muted);font-size:12px}.empty-state{border:1px solid var(--line);border-radius:var(--radius);padding:45px;text-align:center;background:var(--paper)}.empty-state h2{font-size:22px;margin:0 0 7px}.empty-state p{color:var(--muted);margin:0 0 19px}.reset-search{background:var(--ink);color:white;border:0;border-radius:9px;padding:10px 18px}.source-note{margin:0 0 35px;padding:22px 0 0;border-top:1px solid var(--line);display:grid;grid-template-columns:230px minmax(0,1fr);gap:28px}.source-note h2{font-size:17px;margin:0;font-weight:600}.source-note p{font-size:14px;color:var(--muted);margin:0;max-width:760px}.site-footer{border-top:1px solid var(--line);padding:22px 0 30px;display:flex;justify-content:space-between;align-items:center;gap:16px;font-size:13px;color:var(--muted)}.site-footer p{margin:0}.site-footer a{text-decoration:none}.build-notice{background:#fff6de;border:1px solid #e1d09d;border-radius:9px;padding:12px 18px;color:#6e5421;font-size:14px;margin-top:15px}.notes-main{max-width:930px;padding:36px 0 55px}.notes-main h1{font-size:clamp(29px,3.4vw,40px);line-height:1.3;letter-spacing:-.035em;margin:0 0 18px;font-weight:650}.notes-lead{font-size:18px;color:#425549;max-width:820px;margin:0 0 27px}.notes-main h2{font-size:23px;margin:38px 0 14px;font-weight:650;line-height:1.4}.notes-main h3{font-size:17px;margin:0 0 9px}.notes-main p{max-width:850px;color:#4f6055}.notes-main li{margin:8px 0;color:#4f6055}.notes-main ul{padding-left:23px}.notes-callout{border-left:3px solid var(--accent);padding:1px 0 1px 20px;margin:27px 0}.notes-callout p{margin:10px 0}.table-wrap{max-width:100%;overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper)}table{border-collapse:collapse;width:100%;min-width:590px;font-size:14px;line-height:1.7;text-align:left}th,td{padding:14px 16px;vertical-align:top}th{font-weight:600;color:var(--ink);background:var(--soft)}td{color:#4f6055;border-top:1px solid var(--line)}td:first-child{color:var(--ink);font-weight:550}code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.91em;overflow-wrap:anywhere}.notes-index{display:flex;gap:10px 22px;flex-wrap:wrap;margin:28px 0;font-size:14px}.notes-index a{text-decoration:none}.video-notes{border-bottom:1px solid var(--line);padding:15px 0}.video-notes summary{cursor:pointer;display:list-item;list-style-position:outside;font-size:16px;font-weight:550;padding-left:6px;margin-left:17px}.video-notes[open]{padding-bottom:22px}.video-notes p{font-size:14px;margin:13px 0}.video-notes dl{display:grid;grid-template-columns:90px minmax(0,1fr);gap:9px 15px;font-size:14px;margin:15px 0}.video-notes dt{font-weight:600}.video-notes dd{margin:0;color:#4f6055;overflow-wrap:anywhere}.notes-data-links{font-size:13px;color:var(--muted)!important}.notes-data-links a{margin-right:16px}.notes-group-title{margin-top:32px!important;color:var(--accent)}
@media(max-width:1099px){.collection-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:30px}.page-shell{padding:0 26px}.category-buttons button{padding:8px 9px}.search-field{flex-basis:220px}.card-heading{min-height:88px}.player-wrap video{max-height:650px}.source-note{grid-template-columns:180px minmax(0,1fr)}}
@media(max-width:679px){.page-shell{padding:0 20px}.site-header{align-items:flex-start;padding:19px 0 16px;min-height:0;gap:10px;font-size:12px}.header-links{gap:8px 16px;justify-content:flex-end}.site-name{white-space:nowrap}.intro{padding:24px 0 22px}.intro h1{font-size:32px;line-height:1.28;margin-bottom:10px}.intro p{font-size:14px;line-height:1.75}.brief-facts{font-size:12px!important}.collection-controls{padding:11px 0 10px}.category-buttons{display:none}.mobile-category{display:flex;flex:1;align-items:center;gap:7px;min-width:0}.mobile-category label,.search-field label{font-size:12px;white-space:nowrap;color:var(--muted)}.mobile-category select{height:40px;min-width:0;max-width:142px;width:100%;border:1px solid var(--line);border-radius:9px;background:white;font-size:12px;color:var(--ink);padding:5px 6px}.filter-row{gap:11px}.search-field{flex:1;gap:6px;min-width:0}.search-field input{font-size:12px;height:40px;padding:8px;min-width:0}.pagination-row{margin-top:10px;align-items:flex-end}.result-count{font-size:11px;max-width:80px;line-height:1.5}.pagination{gap:5px}.pagination button,.pagination select{font-size:12px;min-height:38px;padding:5px 8px}.pagination select{max-width:112px;padding-right:14px}.collection-main{padding:22px 0 35px}.collection-grid{grid-template-columns:minmax(0,1fr);gap:26px}.card-heading{min-height:0;padding-bottom:14px;grid-template-columns:28px minmax(0,1fr)}.card-heading h2{font-size:21px;line-height:1.4}.title-en{font-size:13px}.player-wrap video{height:clamp(430px,65svh,610px);max-height:none;aspect-ratio:auto}.card-meta{font-size:12px;margin-top:12px}.download-link{font-size:14px}.card-style{font-size:14px}.card-description{font-size:15px}.method-details{font-size:14px}.source-note{grid-template-columns:minmax(0,1fr);gap:10px;padding-top:22px}.source-note h2{font-size:17px}.site-footer{align-items:flex-start;flex-direction:column;gap:10px;padding:20px 0 26px}.notes-main{padding:29px 0 40px}.notes-lead{font-size:16px}.notes-main h2{font-size:21px;margin-top:31px}.notes-main p,.notes-main li{font-size:15px}.notes-main .video-notes p{font-size:14px}.video-notes dl{grid-template-columns:minmax(0,1fr);gap:3px}.video-notes dd{margin-bottom:10px}.table-wrap{margin-right:-3px}.empty-state{padding:30px 20px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}button:active:not(:disabled){transform:none}}