:root{
  --ink:#25314b;
  --muted:#626e86;
  --heading:#253858;
  --blue:#2856d6;
  --blue-soft:#eef3ff;
  --line:#e2e8f0;
  --paper:#fff;
  --surface:#f6f8fc;
  --header:76px;
  --radius:10px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header) + 24px)}
body{margin:0;background:var(--surface);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased}
a{color:var(--blue);text-decoration:none;text-underline-offset:4px}
a:hover{color:#1e43ac;text-decoration:underline}
button{font:inherit}
:focus-visible{outline:3px solid var(--blue);outline-offset:4px}
.skip-link{position:fixed;z-index:40;top:-80px;left:16px;padding:10px 20px;border:1px solid var(--blue);border-radius:8px;background:var(--paper)}
.skip-link:focus{top:10px}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}

/* 页头与章节目录。窄屏目录使用白色浮层，不添加遮罩。 */
.site-header{height:var(--header);position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:0 max(32px,calc((100vw - 1472px)/2));border-bottom:1px solid var(--line);background:var(--paper)}
.wordmark{display:flex;align-items:center;gap:22px;min-width:0;color:var(--heading)}
.wordmark:hover{text-decoration:none}
.brand-logo{display:block;width:auto;height:46px;flex-shrink:0}
.wordmark span{padding-left:22px;border-left:1px solid var(--line);font-size:20px;font-weight:500;letter-spacing:.02em;white-space:nowrap;color:var(--heading)}
.directory-toggle{display:flex;align-items:center;justify-content:center;gap:8px;flex-shrink:0;min-width:42px;min-height:42px;padding:8px 12px;border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--heading);font-size:14px;cursor:pointer}
.directory-toggle svg{display:block;width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.directory-toggle:hover,.directory-toggle[aria-expanded="true"]{border-color:#c7d5fa;background:var(--blue-soft);color:var(--blue)}
.page-layout{display:block;max-width:1536px;margin:auto;padding:32px 32px 56px}
main{min-width:0;container-type:inline-size;container-name:content}
.chapter-directory{display:none;position:fixed;top:calc(var(--header) + 12px);right:24px;z-index:25;width:min(340px,calc(100vw - 32px));max-height:calc(100dvh - var(--header) - 36px);padding:16px 12px;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper);box-shadow:0 12px 36px rgb(37 49 75 / 16%);overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin}
body.directory-open .chapter-directory{display:block}
.directory-title,.directory-heading{margin:0 8px 10px;color:var(--heading);font-size:15px;font-weight:600}
.chapter-directory nav{display:flex;flex-direction:column;gap:3px}
.directory-link{display:block;padding:8px 10px;border-radius:6px;color:var(--muted);font-size:13px;line-height:1.6;overflow-wrap:anywhere}
.directory-link-chapter{margin-top:8px;color:var(--heading);font-weight:600}
.directory-link-chapter:first-child{margin-top:0}
.directory-link-topic{padding-left:18px;font-size:12px}
.directory-link:hover{background:var(--surface);color:var(--blue);text-decoration:none}
.directory-link.is-active,.directory-link[aria-current="location"]{background:var(--blue-soft);color:var(--blue)}

/* 正文以相同边界、层级和间距排布，原有文字及次序保持不变。 */
.intro-panel,.chapter-panel{margin-bottom:24px;padding:36px;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper)}
.intro-panel{padding-top:32px;border-top:3px solid var(--blue)}
p{margin:14px 0;overflow-wrap:anywhere}
.chapter-panel>p,.intro-panel>p{max-width:72ch}
.intro-panel>.intro-statement{max-width:none;margin:4px 0 10px;color:var(--heading);font-size:30px;font-weight:650;line-height:1.5;letter-spacing:-.02em}
.intro-phrase{display:inline-block;white-space:nowrap}
.intro-statement+p:not(.intro-statement){margin-top:24px}
.chapter-title{margin:0 0 28px;padding-bottom:20px;border-bottom:1px solid var(--line);color:var(--heading);font-size:28px;font-weight:650;line-height:1.45;letter-spacing:-.02em;overflow-wrap:anywhere}
.topic-title{margin:48px 0 20px;padding-top:28px;border-top:1px solid var(--line);color:var(--heading);font-size:22px;font-weight:600;line-height:1.5;overflow-wrap:anywhere}
.topic-title.topic-title-no-divider{margin-top:20px;padding:16px 20px;border:0;border-left:3px solid var(--blue);border-radius:0 8px 8px 0;background:var(--blue-soft);font-size:19px}
.chapter-title+.topic-title{margin-top:0;padding-top:0;border-top:0}
h4{margin:28px 0 14px;color:var(--heading);font-size:18px;font-weight:600;line-height:1.6;overflow-wrap:anywhere}
h5{margin:24px 0 12px;color:var(--heading);font-size:17px;font-weight:600;line-height:1.6}
strong{font-weight:600}
em{font-style:normal;font-weight:600}
ul,ol{margin:16px 0 24px;padding-left:25px}
li{margin:10px 0;padding-left:3px}
li p{margin:0}
li::marker{color:var(--blue)}
.feature-list{max-width:76ch;padding-left:24px}
.feature-list li{margin:0;padding:14px 0 14px 4px;border-bottom:1px solid var(--line)}
.feature-list li:last-child{border-bottom:0}
.feature-list strong{color:var(--heading)}
.usage-notes{margin:24px 0;padding:6px 22px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
.usage-notes h4{margin:0;padding:16px 0;font-size:17px;font-weight:500;line-height:1.8}
.usage-notes h4+h4{border-top:1px solid var(--line)}
.service-list{margin:20px 0 28px;padding:16px 24px 16px 44px;border:1px solid #d9e3fa;border-radius:var(--radius);background:var(--blue-soft)}
.service-list li{margin:8px 0}
.trial-steps{margin:24px 0 28px;padding:0 0 0 30px;list-style-position:outside}
.trial-steps li{padding:12px 16px;margin:0;border-bottom:1px solid var(--line)}
.trial-steps li:last-child{border-bottom:0}
.trial-steps li::marker{font-weight:650}
.pain-point{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);align-items:start;gap:28px;margin-top:32px;padding-top:32px;border-top:1px solid var(--line)}
.chapter-title+.pain-point{margin-top:0;padding-top:0;border-top:0}
.pain-copy .topic-title{margin:0 0 20px;padding:0;border:0}
.pain-copy ol{margin-bottom:0}
.pain-point>.gallery{margin:0}

/* 所有原图按实际比例预留空间；缩略图只留白适配，不裁切。 */
.gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;gap:20px;margin:24px 0 32px}
.gallery[data-count="1"]{grid-template-columns:minmax(0,560px)}
.gallery.gallery-wide{grid-template-columns:minmax(0,1fr)}
.image-card{min-width:0;margin:0}
.image-link{display:block;min-width:0;width:100%;padding:0;border:0;background:transparent;cursor:zoom-in}
.image-link img{display:block;width:100%;max-width:100%;height:auto;aspect-ratio:var(--image-ratio,auto);margin:0 auto;padding:10px;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper);object-fit:contain}
.image-link:hover img{border-color:#b9c9ef}
.image-card figcaption{margin-top:10px;padding:0 2px;color:var(--muted);font-size:14px;line-height:1.7;text-align:center;overflow-wrap:anywhere}
.gallery.gallery-documents{grid-template-columns:repeat(2,minmax(0,1fr))}
.gallery.gallery-documents[data-count="1"]{grid-template-columns:minmax(0,1fr)}
.gallery.gallery-portraits{grid-template-columns:repeat(2,minmax(0,1fr));max-width:760px;gap:24px}
.chapter-panel>.gallery.gallery-portraits:not(.gallery-retail-case) .image-link img{height:560px;aspect-ratio:auto;object-fit:contain}
.gallery.gallery-comparison .image-link img{aspect-ratio:2/1}
.gallery.gallery-case-images .image-link img{aspect-ratio:3/2}
.gallery.gallery-case-images.gallery-landscape .image-link img{aspect-ratio:2/1}
.gallery.gallery-aligned-pair{display:flex;align-items:flex-start;gap:20px;--image-padding:10px}
.gallery-aligned-pair>.image-link{flex:var(--image-ratio,1) 1 calc(2 * var(--image-padding) + 2px)}
.gallery.gallery-proportional-rows{grid-template-columns:minmax(0,1fr);gap:20px;--image-padding:10px}
.gallery-proportional-row{display:flex;align-items:flex-start;gap:20px;min-width:0}
.gallery-proportional-row>.image-link{flex:var(--image-ratio,1) 1 calc(2 * var(--image-padding) + 2px)}
.gallery.gallery-aligned-pair .image-link img,.gallery.gallery-proportional-rows .image-link img{padding:var(--image-padding);aspect-ratio:var(--image-ratio,auto)}
.gallery.gallery-retail-case{grid-template-columns:repeat(4,minmax(0,1fr));max-width:none}
.gallery-retail-case>.image-link:nth-child(-n+2){grid-column:span 2}
.gallery.gallery-retail-case .image-link img{aspect-ratio:9/16}
.gallery.gallery-retail-case>.image-link:nth-child(-n+2) img,.gallery.gallery-supermarket-case>.image-link:nth-child(-n+2) img{aspect-ratio:16/10}
.intro-panel .gallery{grid-template-columns:repeat(4,minmax(0,1fr));gap:20px 16px;max-width:none;margin:28px 0 0;padding-top:28px;border-top:1px solid var(--line)}
.intro-panel .gallery .image-link img{aspect-ratio:9/16}
.intro-panel .image-card{display:grid;grid-template-rows:auto 1fr}
.intro-panel .image-card figcaption{min-height:48px}

/* 视频卡片按照可用正文宽度逐步换列。 */
.video-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));align-items:start;gap:24px 20px;margin:24px 0 32px}
.video-grid.video-grid-cases{grid-template-columns:repeat(5,minmax(0,1fr));gap:24px 16px}
.video-card{min-width:0;margin:0}
.video-preview{position:relative;max-width:100%}
.video-preview>video{pointer-events:none}
.video-card video,.video-placeholder{display:block;width:100%;height:360px;padding:10px;border:1px solid var(--line);border-radius:var(--radius);background:var(--paper);object-fit:contain}
.video-grid-cases .video-card video,.video-grid-cases .video-placeholder{height:auto;aspect-ratio:9/16}
.video-placeholder{display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:14px;text-align:center}
.video-preview-button{position:absolute;inset:0;display:grid;place-items:center;width:100%;height:100%;padding:0;border:0;border-radius:var(--radius);background:transparent;cursor:pointer}
.video-play-icon{display:grid;place-items:center;width:48px;height:48px;border:1px solid rgb(255 255 255 / 60%);border-radius:50%;background:rgb(37 49 75 / 75%);color:#fff;box-shadow:0 3px 12px rgb(37 49 75 / 16%)}
.video-play-icon svg{display:block;width:23px;height:23px;fill:currentColor}
.video-preview-button:hover .video-play-icon{background:var(--blue)}
.video-preview-button:focus-visible{outline-offset:-4px}
.video-card figcaption{min-height:48px;padding:10px 2px 0;font-size:14px;line-height:1.7}
.video-view-button{display:flex;align-items:flex-start;gap:8px;min-width:0;width:100%;padding:0;border:0;background:transparent;color:var(--muted);text-align:left;cursor:pointer}
.video-filename{min-width:0;white-space:normal;overflow-wrap:anywhere}
.video-view-label{flex-shrink:0;margin-left:auto;color:var(--blue);white-space:nowrap}
.video-view-button:hover .video-view-label{text-decoration:underline}
.lead-case-layout{display:grid;grid-template-columns:minmax(0,.75fr) minmax(0,1.25fr);align-items:start;gap:24px;margin:24px 0 32px}
.lead-case-layout>.gallery{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;max-width:none;margin:0}
.lead-case-layout .gallery .image-link img{aspect-ratio:1/1}
.lead-case-layout>.video-card{width:100%;max-width:340px}
.lead-case-layout .video-card video,.lead-case-layout .video-placeholder{height:500px;max-height:60vh;aspect-ratio:var(--video-ratio,9/16)}

/* 原因与对比内容使用同一网格行，让对应项目的起点一致。 */
.reason-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:24px 0 30px}
.reason-card{display:grid;grid-template-rows:subgrid;grid-row:span 2;gap:0;min-width:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--paper)}
.reason-card-title{margin:0;padding:18px;border-bottom:1px solid var(--line);background:var(--blue-soft);color:var(--heading);font-size:15px;font-weight:500;line-height:1.8}
.reason-card-body{display:flex;flex-direction:column;align-items:center;gap:20px;padding:20px 16px}
.reason-card-body .image-link{max-width:440px}
.reason-card-body .image-link img{height:250px;aspect-ratio:auto;object-fit:contain}
.reason-card-body>.image-link:only-child img{height:520px}
.comparison-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:24px 0 30px}
.comparison-card{display:grid;grid-template-rows:subgrid;grid-row:span 2;gap:0;min-width:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--paper)}
.comparison-card-title{margin:0;padding:18px 20px;border-bottom:1px solid var(--line);background:var(--blue-soft);color:var(--heading);font-size:18px;line-height:1.6;overflow-wrap:anywhere}
.comparison-card-title strong{font-weight:600}
.comparison-card-body{padding:20px;color:var(--ink);font-size:15px;line-height:1.8;overflow-wrap:anywhere}
.comparison-card-body p{margin:0 0 16px}
.comparison-card-body p:last-child{margin-bottom:0}
.comparison-card-body .comparison-label{margin-bottom:6px;color:var(--heading);font-weight:600}
.comparison-history{grid-template-rows:auto repeat(3,auto);row-gap:0}
.comparison-history>.comparison-card{grid-row:span 4}
.comparison-history .comparison-card-body{display:grid;grid-template-rows:subgrid;grid-row:span 3;gap:0;padding:0 20px}
.comparison-item{padding:18px 0;border-bottom:1px solid var(--line)}
.comparison-item:last-child{border-bottom:0}
.comparison-video-card{grid-row:span 3}
.comparison-video-card>.video-card{width:calc(100% - 40px);max-width:360px;margin:0 auto 20px}
.comparison-video-card .video-card video,.comparison-video-card .video-placeholder{height:420px}
.comparison-video-card .video-filename{color:var(--heading);font-weight:600}

/* 自查表保留完整字段；设备图片使用一致的缩略图尺寸。 */
.table-wrap{overflow-x:auto;margin:24px 0 30px;border:1px solid var(--line);border-radius:8px;scrollbar-width:thin}
table{width:100%;border-collapse:collapse;background:var(--paper);font-size:15px;line-height:1.8}
th,td{padding:14px 18px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);text-align:left;vertical-align:top;overflow-wrap:anywhere}
th:last-child,td:last-child{border-right:0}
tr:last-child td{border-bottom:0}
th{background:var(--blue-soft);color:var(--heading);font-weight:600}
.checklist-table table{table-layout:fixed}
.checklist-table th:last-child,.checklist-table td:last-child{width:100px;text-align:center}
.illustrated-table table{table-layout:fixed}
.illustrated-table th:nth-child(1){width:25%}
.illustrated-table th:nth-child(2){width:15%}
.illustrated-table th:nth-child(3){width:24%}
.illustrated-table th:nth-child(4){width:36%}
.illustrated-table td{vertical-align:middle}
td .image-link{width:100%;max-width:200px;margin:0 auto}
td .image-link img{height:140px;aspect-ratio:auto;padding:6px}
footer{padding:4px 0 32px;text-align:center;font-size:14px}
footer a,.back-to-top{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:8px 16px;border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--blue);font-size:14px}
.back-to-top{position:fixed;right:22px;bottom:24px;z-index:15;box-shadow:0 4px 16px rgb(37 49 75 / 10%);cursor:pointer}
.back-to-top[hidden]{display:none}

/* 预览只给内容及控件加阴影，背景完全透明。 */
html.media-viewer-open{overflow:hidden}
.media-viewer{position:fixed;inset:0;width:100%;height:100%;max-width:none;max-height:none;margin:0;padding:0;border:0;border-radius:0;background:transparent;color:var(--ink);overflow:hidden;overscroll-behavior:none}
.media-viewer::backdrop{background:transparent}
.media-viewer-content{position:absolute;inset:80px 32px 108px;overflow:hidden;touch-action:none}
.media-viewer-frame{position:absolute;left:50%;top:50%;transform-origin:center;user-select:none}
.media-viewer-image,.media-viewer-frame video{display:block;width:100%;height:100%;max-width:none;max-height:none;padding:0;border:0;border-radius:8px;background:var(--paper);object-fit:contain;box-shadow:0 10px 40px rgb(37 49 75 / 24%)}
.media-viewer-image{cursor:grab;touch-action:none}
.media-viewer.is-dragging .media-viewer-image{cursor:grabbing}
.media-viewer-frame video{background:#000;touch-action:auto}
.media-viewer-close{position:absolute;z-index:3;top:24px;right:32px;display:grid;place-items:center;width:42px;height:42px;padding:0;border:1px solid var(--line);border-radius:8px;background:var(--paper);color:var(--heading);box-shadow:0 4px 20px rgb(37 49 75 / 16%);cursor:pointer}
.media-viewer-close:hover{background:var(--blue-soft);color:var(--blue)}
.media-viewer svg{display:block;width:19px;height:19px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;pointer-events:none}
.media-viewer-close svg{width:22px;height:22px}
.media-viewer-toolbar{position:absolute;z-index:3;bottom:max(32px,env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:0;max-width:calc(100% - 24px);padding:5px 10px;border:1px solid var(--line);border-radius:8px;background:var(--paper);box-shadow:0 6px 24px rgb(37 49 75 / 16%);color:var(--muted)}
.media-viewer-toolbar button{display:grid;place-items:center;flex-shrink:0;width:40px;height:40px;padding:0;border:0;border-radius:5px;background:transparent;color:inherit;font-size:15px;line-height:1;cursor:pointer}
.media-viewer-toolbar button:hover,.media-viewer-toolbar button[aria-pressed="true"]{background:var(--blue-soft);color:var(--blue)}
.media-viewer [hidden]{display:none}
.media-viewer-status{position:absolute;z-index:2;left:50%;top:50%;transform:translate(-50%,-50%);max-width:calc(100% - 40px);margin:0;padding:14px 20px;border-radius:8px;background:var(--paper);color:var(--ink);font-size:14px;text-align:center;box-shadow:0 4px 20px rgb(37 49 75 / 16%)}

@media(min-width:1280px){
  .page-layout{display:grid;grid-template-columns:210px minmax(0,1fr);align-items:start;gap:24px}
  .chapter-directory{display:block;position:sticky;top:calc(var(--header) + 24px);right:auto;z-index:1;width:auto;max-height:calc(100dvh - var(--header) - 48px);padding:4px 0 12px;border:0;border-radius:0;background:transparent;box-shadow:none}
  .directory-toggle{display:none}
}
@container content (max-width:1100px){
  .video-grid.video-grid-cases{grid-template-columns:repeat(4,minmax(0,1fr))}
}
@container content (max-width:900px){
  .video-grid.video-grid-cases{grid-template-columns:repeat(3,minmax(0,1fr))}
  .reason-cards{grid-template-columns:minmax(0,1fr)}
  .reason-card{grid-row:auto;grid-template-rows:auto auto}
  .reason-card-body{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;justify-items:center}
  .reason-card-body>.image-link:only-child{grid-column:1/-1;max-width:360px}
}
@container content (max-width:680px){
  .video-grid.video-grid-cases{grid-template-columns:repeat(2,minmax(0,1fr))}
}
.video-grid[data-count="2"]{grid-template-columns:repeat(2,minmax(0,1fr));max-width:680px}
@media(max-width:1100px){
  .page-layout{padding:28px 24px 48px}
  .intro-panel,.chapter-panel{padding:30px}
  .pain-point{gap:24px}
  .intro-panel .gallery{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:800px){
  :root{--header:64px}
  .site-header{gap:12px;padding:0 20px}
  .brand-logo{height:40px}
  .wordmark{gap:14px}
  .wordmark span{padding-left:14px;font-size:16px;letter-spacing:0}
  .page-layout{padding:20px 16px 40px}
  .intro-panel,.chapter-panel{padding:26px 22px;margin-bottom:20px}
  .intro-panel>.intro-statement{font-size:26px}
  .chapter-title{padding-bottom:18px;font-size:24px}
  .topic-title{margin-top:40px;padding-top:24px;font-size:20px}
  .topic-title.topic-title-no-divider{padding:14px 16px;font-size:18px}
  .pain-point{grid-template-columns:minmax(0,1fr);gap:20px;margin-top:32px;padding-top:28px}
  .pain-copy .topic-title{margin-bottom:16px}
  .gallery,.gallery.gallery-portraits{gap:16px;margin-top:22px;margin-bottom:28px}
  .gallery.gallery-retail-case{grid-template-columns:repeat(2,minmax(0,1fr))}
  .gallery-retail-case>.image-link:nth-child(-n+2){grid-column:auto}
  .gallery.gallery-aligned-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));--image-padding:8px}
  .gallery.gallery-proportional-rows{--image-padding:8px;gap:16px}
  .gallery-proportional-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
  .image-link img,.video-card video,.video-placeholder{padding:8px}
  .video-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 16px}
  .video-grid[data-count="2"]{max-width:none}
  .video-card video,.video-placeholder{height:340px}
  .lead-case-layout{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:18px}
  .lead-case-layout>.gallery{gap:12px}
  .lead-case-layout .video-card video,.lead-case-layout .video-placeholder{height:380px}
  .comparison-cards{gap:16px}
  .comparison-card-title,.comparison-card-body{padding:16px}
  .comparison-history .comparison-card-body{padding:0 16px}
  .comparison-video-card>.video-card{width:calc(100% - 32px);margin-bottom:16px}
  .comparison-video-card .video-card video,.comparison-video-card .video-placeholder{height:320px}
  th,td{padding:12px 14px;font-size:14px}
  .checklist-table th:last-child,.checklist-table td:last-child{width:84px}
}
@media(max-width:600px){
  .site-header{padding:0 16px}
  .wordmark span{font-size:14px}
  .wordmark{gap:10px}
  .wordmark span{padding-left:10px}
  .page-layout{padding:16px 12px 32px}
  .intro-panel,.chapter-panel{padding:24px 18px}
  .intro-panel>.intro-statement{font-size:24px;line-height:1.55}
  .chapter-title{font-size:23px;line-height:1.5}
  .topic-title{font-size:20px;line-height:1.55}
  .chapter-panel>p,.intro-panel>p{max-width:none}
  .gallery,.gallery.gallery-documents,.gallery.gallery-portraits,.gallery.gallery-retail-case,.gallery.gallery-aligned-pair{grid-template-columns:minmax(0,1fr);max-width:none}
  .gallery.gallery-proportional-rows{display:grid;grid-template-columns:minmax(0,1fr)}
  .gallery-proportional-row{display:contents}
  .gallery.gallery-comparison .image-link img,.gallery.gallery-case-images .image-link img,.gallery.gallery-case-images.gallery-landscape .image-link img,.gallery.gallery-retail-case .image-link img,.gallery.gallery-retail-case>.image-link:nth-child(-n+2) img,.gallery.gallery-supermarket-case>.image-link:nth-child(-n+2) img{aspect-ratio:var(--image-ratio,auto)}
  .intro-panel .gallery{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 12px}
  .intro-panel .image-card figcaption{font-size:14px;min-height:0}
  .intro-panel .gallery .image-link img{padding:6px}
  .reason-card-title{padding:16px}
  .reason-card-body{display:flex;padding:18px 16px}
  .reason-card-body .image-link img{height:220px}
  .reason-card-body>.image-link:only-child img{height:460px}
  .chapter-panel>.gallery.gallery-portraits:not(.gallery-retail-case) .image-link img{height:520px}
  .comparison-cards,.comparison-cards.comparison-video-cards{grid-template-columns:minmax(0,1fr)}
  .comparison-history{grid-template-rows:none;row-gap:20px}
  .comparison-card,.comparison-history>.comparison-card,.comparison-video-card{grid-row:auto;grid-template-rows:auto}
  .comparison-history .comparison-card-body{display:block;grid-row:auto}
  .comparison-item{padding:16px 0}
  .comparison-video-card .video-card video,.comparison-video-card .video-placeholder{height:420px;max-height:60vh}
  .usage-notes{padding:4px 16px}
  .usage-notes h4{padding:14px 0;font-size:16px}
  .service-list{padding:14px 18px 14px 38px}
  .trial-steps li{padding:12px 4px}
  .lead-case-layout{grid-template-columns:minmax(0,1fr);gap:20px}
  .lead-case-layout>.video-card{max-width:340px;margin-inline:auto}
  .lead-case-layout .video-card video,.lead-case-layout .video-placeholder{height:460px;max-height:65vh}
  .lead-case-layout>.gallery{grid-template-columns:minmax(0,1fr);gap:16px}
  .lead-case-layout .gallery .image-link img{aspect-ratio:var(--image-ratio,auto)}
  .illustrated-table{border:0;border-radius:0;background:transparent;overflow:visible}
  .illustrated-table table,.illustrated-table tbody{display:block;min-width:0}
  .illustrated-table thead{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
  .illustrated-table tbody tr{display:block;margin:0 0 16px;border:1px solid var(--line);border-radius:8px;overflow:hidden}
  .illustrated-table tbody tr:last-child{margin-bottom:0}
  .illustrated-table td{position:relative;display:block;min-width:0;min-height:49px;width:auto;padding:12px 14px 12px 90px;border:0;border-bottom:1px solid var(--line);font-size:14px}
  .illustrated-table td::before{position:absolute;top:12px;left:14px;width:64px;content:attr(data-label);color:var(--muted);font-weight:500;line-height:1.8}
  .illustrated-table tr td:last-child{border-bottom:0}
  .illustrated-table tr:last-child td{border-bottom:1px solid var(--line)}
  .illustrated-table tr:last-child td:last-child{border-bottom:0}
  .illustrated-table td:first-child{background:var(--blue-soft);color:var(--heading);font-weight:600}
  .illustrated-table td .image-link{margin:0;max-width:190px}
  .checklist-table th,.checklist-table td{padding:11px 12px}
  .checklist-table th:last-child,.checklist-table td:last-child{width:80px;padding-left:8px;padding-right:8px}
  .back-to-top{right:16px;bottom:16px;min-height:40px;padding:7px 12px;font-size:13px}
  .media-viewer-content{inset:max(70px,calc(env(safe-area-inset-top) + 54px)) 12px max(88px,calc(env(safe-area-inset-bottom) + 72px))}
  .media-viewer-close{top:max(16px,env(safe-area-inset-top));right:16px;width:40px;height:40px}
  .media-viewer-toolbar{bottom:max(20px,env(safe-area-inset-bottom));padding:4px 6px}
  .media-viewer-toolbar button{width:38px;height:40px}
}
@container content (max-width:440px){
  .video-grid,.video-grid.video-grid-cases,.video-grid[data-count="2"]{grid-template-columns:minmax(0,1fr)}
  .video-grid-cases .video-preview{max-width:300px;margin-inline:auto}
  .video-grid-cases .video-card video,.video-grid-cases .video-placeholder{height:420px;aspect-ratio:auto}
  .video-grid-cases .video-card figcaption{max-width:300px;margin-inline:auto}
}
@media(max-width:380px){
  .wordmark span{display:none}
  .intro-panel,.chapter-panel{padding:22px 16px}
  .intro-panel>.intro-statement{font-size:22px}
  .media-viewer-toolbar{max-width:calc(100% - 16px);padding:4px}
  .media-viewer-toolbar button{width:36px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media print{
  .site-header,.chapter-directory,.directory-toggle,footer,.skip-link,.back-to-top,.media-viewer[open]{display:none}
  .page-layout{display:block;padding:0}
  main{container-type:normal}
  body{background:#fff}
  .intro-panel,.chapter-panel{margin:0;padding:12px;border:0}
  .gallery,.reason-card,.comparison-card{break-inside:avoid}
  .video-card video,.video-placeholder{height:180px}
  .table-wrap{overflow:visible}
}