:root{--bg:#F4F3EF;--text:#2B2927;--link:#234A66;--accent:#B14A2B;--line:rgba(43,41,39,.55);--max:1220px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:"Noto Sans JP",sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
.shell{width:min(var(--max),calc(100% - 96px));margin-inline:auto}
.skip-link{position:fixed;top:0;left:12px;z-index:10;padding:10px 16px;background:var(--text);color:#fff;transform:translateY(-120%)}
.skip-link:focus{transform:translateY(0)}
.hero{padding-top:clamp(92px,11vw,160px)}
.eyebrow{margin:0 0 18px;font-size:1.22rem;font-weight:500;letter-spacing:.06em}
.hero h1{margin:0;font-family:"Noto Serif JP",serif;font-size:clamp(2rem,3.7vw,3.5rem);font-weight:400;line-height:1.45;letter-spacing:.045em}
.hero-lead{margin:34px 0 0;font-family:"Noto Serif JP",serif;font-size:clamp(1.18rem,1.74vw,1.52rem);letter-spacing:.035em}
.toc{width:min(640px,calc(100% - 96px));margin-top:clamp(72px,9vw,125px);border:1px solid var(--text);display:grid;grid-template-columns:34% 66%;min-height:280px}
.toc-title{margin:0;padding:30px 42px;border-right:1px solid var(--text);font-family:"Noto Serif JP",serif;font-size:1.7rem}
.toc ol{list-style:none;margin:0;padding:30px 48px;display:grid;align-content:center;gap:5px}
.toc a{display:grid;grid-template-columns:3rem 1fr;gap:12px;padding:3px 8px;color:var(--text);font-size:1.2rem;text-decoration:none;transition:color .2s,background .2s}
.toc a:hover,.toc a:focus-visible{color:var(--link);background:rgba(35,74,102,.07);outline:none}
.performance-section,.compact-section{scroll-margin-top:32px}
.performance-section{padding-top:clamp(120px,13vw,190px)}
h2{margin:0 0 44px;display:flex;align-items:baseline;gap:30px;font-size:clamp(1.55rem,2.2vw,2.15rem);font-weight:500;letter-spacing:.035em}
h2 span{font-size:.9em;font-weight:400;min-width:76px}
.info-media-grid,.load-grid{display:grid;grid-template-columns:minmax(0,1.28fr) minmax(350px,.72fr);gap:clamp(54px,7vw,105px);align-items:start}
.technical-copy p,.compact-copy p{margin:0}
.test-meta b{font-weight:400}
.data-block{margin-top:30px}
.data-block h3{margin:0;font-size:1rem;font-weight:500;line-height:1.75}
.note{margin-top:4px!important;font-size:.82rem;line-height:1.65;color:#55514d}
.result-block{margin-top:28px}
.result-block strong{font-size:1.08em;font-weight:600}
.test-photo{margin:8px 0 0}
.test-photo img{width:100%;aspect-ratio:4/3;object-fit:cover}
.water-photo img{aspect-ratio:1/1;object-position:center}
figcaption{text-align:center;margin-top:9px;font-size:.9rem}
.video-row{margin-top:clamp(64px,7vw,96px);display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,.72fr);gap:clamp(28px,3vw,44px);align-items:end}
.video-row>p{margin:0 0 8px;font-size:1rem;font-weight:500;line-height:1.8}
.video-wrap{position:relative;aspect-ratio:16/9;background:#ddd}
.video-wrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.assumed-region{margin-top:30px!important}
.load-grid{grid-template-columns:minmax(0,1fr) minmax(360px,.85fr)}
.load-result p+p{margin-top:2px}
.result-table{margin:7px 0 0}
.result-table table{width:100%;border-collapse:collapse;font-size:1.05rem}
.result-table th,.result-table td{padding:15px 18px;border-top:1px solid var(--line);text-align:center;font-weight:400}
.result-table th+th,.result-table th+td{border-left:1px solid var(--line)}
.result-table tbody tr:last-child>*{border-bottom:1px solid var(--line)}
.result-table thead th{font-weight:500}
.compact-sections{padding:clamp(140px,15vw,210px) 0 clamp(100px,11vw,160px)}
.compact-section+.compact-section{margin-top:clamp(100px,10vw,145px)}
.compact-section h2{margin-bottom:48px}
.compact-copy{padding-left:0;max-width:1050px}
.compact-copy .data-block{margin-top:30px}
@media (min-width:901px){
  .performance-section,.compact-sections{font-size:1.125rem}
  .performance-section .data-block h3,.compact-sections .data-block h3{font-size:1em}
  .performance-section .note,.compact-sections .note{font-size:.82em}
}
@media (max-width:900px){
  .shell{width:min(100% - 40px,var(--max))}.hero{padding-top:72px}.hero h1{font-size:clamp(2rem,7.5vw,3rem);line-height:1.5}.hero-lead{margin-top:25px}
  .toc{width:calc(100% - 40px);grid-template-columns:1fr;min-height:0}.toc-title{padding:20px 24px;border-right:0;border-bottom:1px solid var(--text);font-size:1.4rem}.toc ol{padding:20px 20px 24px}.toc a{padding:7px 8px;font-size:1.05rem}
  .performance-section{padding-top:105px}h2{margin-bottom:34px;gap:14px;flex-wrap:wrap}h2 span{min-width:auto}
  .info-media-grid,.load-grid{grid-template-columns:1fr;gap:42px}.test-photo{order:2}.test-photo img,.water-photo img{aspect-ratio:auto;max-height:560px;object-fit:contain;background:#eceae5}
  .video-row{margin-top:52px;grid-template-columns:1fr;gap:24px;align-items:start}.video-row>p{order:-1;font-weight:400}
  .result-table{margin-top:0}.result-table table{font-size:1rem}.result-table th,.result-table td{padding:13px 10px}
  .compact-sections{padding-top:112px}.compact-section+.compact-section{margin-top:92px}
}
@media (max-width:520px){
  body{font-size:15px;line-height:1.8}.shell{width:calc(100% - 32px)}.hero{padding-top:56px}.eyebrow{margin-bottom:14px;font-size:1.125rem}.hero h1{font-size:1.55rem;letter-spacing:.02em}.hero h1 br{display:none}.hero-lead{font-size:1.12rem}
  .toc{width:calc(100% - 32px);margin-top:58px}.toc ol{padding-inline:15px}.toc a{grid-template-columns:2.5rem 1fr}
  .performance-section{padding-top:86px}.performance-section,.compact-section{scroll-margin-top:16px}h2{font-size:1.4rem;margin-bottom:28px}.info-media-grid,.load-grid{gap:34px}
  .data-block{margin-top:25px}.note{font-size:.78rem}.note br{display:none}.video-row{margin-top:44px}.video-row>p{font-size:.93rem}.compact-sections{padding:90px 0 82px}.compact-section+.compact-section{margin-top:76px}.compact-section h2{margin-bottom:30px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}