:root{--ink:#233b43;--teal:#37697b;--teal-dark:#234f5f;--teal-soft:#e6f1ef;--orange:#d78359;--orange-soft:#fff0e4;--cream:#fbf8f2;--line:#cfddda;--muted:#5d7379;--green:#477863;--red:#a74f43;--white:#fff;font-size:20px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:88px}body{margin:0;background:var(--cream);color:var(--ink);line-height:1.85}.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:#fff;padding:10px;z-index:200}a{color:var(--teal);text-underline-offset:4px}button,input{font:inherit}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #cf6f3e;outline-offset:3px}.article-top{position:sticky;top:0;z-index:20;background:rgba(251,248,242,.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.article-top .inner{width:min(1040px,calc(100% - 40px));min-height:72px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:20px}.article-brand{text-decoration:none;color:var(--ink)}.article-brand strong,.article-brand small{display:block;line-height:1.4}.article-brand strong{font-size:.86rem;letter-spacing:.05em}.article-brand small{font-size:.58rem;color:var(--teal)}.top-links{display:flex;gap:18px}.top-links a{font-size:.7rem;font-weight:700}.article-shell{width:min(1040px,calc(100% - 40px));margin:auto;padding-bottom:90px}.article-hero{display:grid;grid-template-columns:1.13fr .87fr;gap:6%;align-items:center;padding:70px 0 52px}.eyebrow{color:#aa6748;font-size:.58rem;font-weight:700;letter-spacing:.18em;margin:0 0 14px}.article-hero h1{font-size:clamp(2.15rem,5.6vw,3.65rem);line-height:1.28;margin:0 0 18px;color:var(--teal-dark)}.article-hero h1 em{font-style:normal;color:var(--orange)}.article-hero .lead{font-size:1.08rem;color:#456169;margin:0 0 20px;max-width:660px}.meta{font-size:.68rem;color:var(--muted)}.hero-joint{min-height:360px;position:relative;display:grid;place-items:center;background:linear-gradient(150deg,#dcebe7,#f1e1d2);border-radius:46% 46% 18px 18px;overflow:hidden}.joint-disc{width:145px;height:145px;border:25px solid var(--teal);border-radius:50%;position:relative;transform:rotate(-14deg);box-shadow:0 0 0 34px rgba(255,255,255,.48)}.joint-disc:after{content:"";position:absolute;left:50%;top:-60px;width:38px;height:215px;background:var(--cream);border-radius:30px;transform:translateX(-50%) rotate(18deg)}.hero-note{position:absolute;left:25px;bottom:24px;background:#fff;padding:13px 16px;border-radius:10px;font-size:.67rem;font-weight:700;color:var(--teal-dark);box-shadow:0 10px 28px rgba(35,79,95,.12)}.toolbar{display:flex;gap:9px;flex-wrap:wrap;margin-top:22px}.tool-button{border:1px solid #94b1b3;background:#fff;color:var(--teal-dark);border-radius:8px;padding:8px 13px;min-height:44px;font-size:.72rem;font-weight:700;cursor:pointer}.article-nav{display:flex;gap:8px;overflow-x:auto;border-block:1px solid var(--line);padding:15px 0;margin-bottom:20px}.article-nav a{flex:none;border:1px solid #b9ccca;border-radius:999px;padding:7px 13px;text-decoration:none;font-size:.68rem;font-weight:700;background:#fff}.article-section{padding:50px 0;border-bottom:1px solid var(--line)}.article-section h2{font-size:clamp(1.5rem,3.6vw,2rem);line-height:1.45;color:var(--teal-dark);margin:0 0 20px}.article-section h3{font-size:1.02rem;line-height:1.5;margin:26px 0 10px}.article-section p{margin:0 0 19px}.takeaway{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.takeaway-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}.takeaway-card b{display:block;color:var(--orange);font-size:.65rem;letter-spacing:.08em;margin-bottom:8px}.takeaway-card strong{display:block;font-size:1rem;line-height:1.5;margin-bottom:6px}.takeaway-card p{font-size:.76rem;color:var(--muted);margin:0}.notice{border-left:5px solid var(--orange);background:var(--orange-soft);padding:20px 23px;margin:25px 0}.notice strong{color:#86472f}.pathway{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:26px}.path-step{background:#fff;border:1px solid var(--line);border-radius:13px;padding:20px}.path-step span{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--teal);color:#fff;font-size:.7rem;font-weight:700}.path-step h3{margin:13px 0 7px;font-size:.9rem}.path-step p{font-size:.7rem;color:var(--muted);margin:0}.guideline-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.guide-card{background:#fff;border-top:5px solid var(--teal);border-radius:13px;padding:22px}.guide-card.uk{border-top-color:#d5855e}.guide-card.tw{border-top-color:#668c70}.guide-card h3{margin:0 0 11px}.guide-card ul{padding-left:20px;margin:0}.guide-card li{font-size:.74rem;margin:9px 0}.guide-card .stamp{display:block;color:var(--muted);font-size:.62rem;margin-top:15px}.exercise-layout{display:grid;grid-template-columns:1fr 300px;gap:28px;align-items:start}.exercise-image{background:#fff;border-radius:15px;border:1px solid var(--line);padding:12px;margin:0}.exercise-image img{display:block;width:100%;height:auto;border-radius:10px}.exercise-image figcaption{font-size:.62rem;color:var(--muted);padding:10px 5px 2px}.exercise-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.exercise-card{background:var(--teal-soft);border-radius:12px;padding:18px}.exercise-card h3{margin:0 0 5px;font-size:.86rem}.exercise-card p{margin:0;color:#4c666c;font-size:.71rem}.pain-rule{margin-top:18px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px}.pain-rule b{color:var(--green)}.compare-wrap{overflow-x:auto}.compare{width:100%;border-collapse:collapse;min-width:760px;font-size:.72rem}.compare th,.compare td{padding:14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.compare th{background:#dfece9;color:var(--teal-dark)}.compare tbody th{background:#f5f0e8;white-space:nowrap}.evidence{display:inline-block;border-radius:999px;padding:3px 9px;font-size:.58rem;font-weight:700;background:#e6efeb;color:#416b58}.evidence.mixed{background:#fff0db;color:#8a5c2f}.evidence.against{background:#f7e1dc;color:#914d41}.research-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.research-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px}.research-item span{font-size:.62rem;color:var(--orange);font-weight:700}.research-item h3{margin:8px 0;font-size:.88rem}.research-item p{font-size:.7rem;color:var(--muted);margin:0}.check-list{background:#fff;border:1px solid var(--line);border-radius:15px;padding:20px 24px}.check-list label{display:flex;align-items:flex-start;gap:12px;padding:11px 0;border-bottom:1px solid #edf1ef;font-size:.8rem;cursor:pointer}.check-list label:last-of-type{border-bottom:0}.check-list input{width:22px;height:22px;flex:none;margin-top:5px;accent-color:var(--teal)}.check-result{display:block;margin-top:14px;background:var(--teal-soft);padding:15px;border-radius:9px;font-size:.76rem}.check-result.alert{background:#f8e0da;color:#7e382e}.faq details{background:#fff;border:1px solid var(--line);border-radius:10px;margin:10px 0;padding:0 19px}.faq summary{cursor:pointer;font-weight:700;font-size:.82rem;padding:16px 0}.faq details p{font-size:.76rem;color:var(--muted);padding-bottom:16px;margin:0}.source-list{padding-left:22px}.source-list li{margin:15px 0;font-size:.72rem}.source-list small{display:block;color:var(--muted);line-height:1.65}.source-note{background:#eef3f0;padding:18px;border-radius:10px;font-size:.7rem;color:var(--muted)}.medical-note{margin-top:38px;font-size:.68rem;color:var(--muted)}.home-return{position:fixed;right:22px;bottom:max(22px,env(safe-area-inset-bottom));z-index:50;background:var(--teal-dark);color:#fff;text-decoration:none;border:1px solid #fff;border-radius:999px;padding:11px 16px;font-size:.7rem;font-weight:700;box-shadow:0 8px 25px rgba(22,53,63,.24)}
@media(max-width:820px){.article-hero{grid-template-columns:1fr}.hero-joint{min-height:260px;max-width:520px;width:100%;margin:auto}.takeaway,.guideline-grid{grid-template-columns:1fr}.pathway{grid-template-columns:1fr 1fr}.exercise-layout{grid-template-columns:1fr}.exercise-image{max-width:420px}.research-grid{grid-template-columns:1fr}}
@media(max-width:560px){:root{font-size:19px}.article-shell,.article-top .inner{width:min(100% - 30px,1040px)}.article-top .inner{min-height:68px}.top-links a:first-child{display:none}.article-hero{padding-top:45px}.hero-joint{min-height:220px}.joint-disc{width:110px;height:110px;border-width:20px}.takeaway,.pathway,.exercise-list{grid-template-columns:1fr}.article-section{padding:38px 0}.home-return{right:13px;bottom:max(13px,env(safe-area-inset-bottom))}.hero-note{left:16px;bottom:15px}.tool-button{width:100%}}
@media print{.article-top,.toolbar,.article-nav,.home-return{display:none}.article-shell{width:100%;padding:0 10mm}.article-hero{padding-top:20px}.article-section{break-inside:avoid}.hero-joint{min-height:220px}.compare{font-size:10pt}}
.source-disclosure{overflow:hidden;border:1px solid var(--line);border-radius:16px;background:#fff}.source-disclosure summary{display:flex;align-items:center;gap:12px;padding:18px 20px;list-style:none;cursor:pointer;color:var(--teal-dark);font-weight:800}.source-disclosure summary::-webkit-details-marker{display:none}.source-disclosure summary::after{content:"＋";margin-left:auto;font-size:1.2rem;line-height:1}.source-disclosure[open] summary::after{content:"－"}.source-disclosure summary span{padding:4px 9px;border-radius:999px;background:#f5eadb;color:var(--teal-dark);font-size:.78rem;white-space:nowrap}.source-panel{padding:2px 20px 20px;border-top:1px solid var(--line)}