:root{--paper:#FAFAF6;--sky:#DDECF1;--blue:#5497BA;--orange:#E99B60;--ink:#294653;--line:#E4E9E8;--text:#303A40;--muted:#62727A;--white:#fff;--radius:12px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:108px}body{margin:0;background:var(--paper);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased}a{color:var(--ink);text-decoration:none;text-underline-offset:5px}a:hover{text-decoration:underline}button{font:inherit}img{display:block;max-width:100%;height:auto}h1,h2,h3,p,ul,ol{margin-top:0}h1,h2,h3{color:var(--ink);line-height:1.4;font-weight:650;overflow-wrap:anywhere}h1{font-size:clamp(32px,4.3vw,58px);letter-spacing:-.035em;margin-bottom:24px}h2{font-size:clamp(25px,2.6vw,34px);letter-spacing:-.025em;margin-bottom:24px}h3{font-size:20px;margin-bottom:12px}p{margin-bottom:20px}ul,ol{padding-left:1.4em}li{margin-bottom:10px}a:focus-visible,button:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--blue);outline-offset:5px;border-radius:3px}.container{width:min(1280px,calc(100% - 96px));margin-inline:auto}.site-header{position:relative;z-index:20;background:rgba(250,250,246,.98);border-bottom:1px solid var(--line)}.header-inner{width:min(1440px,calc(100% - 64px));margin:auto;display:flex;align-items:center;gap:32px;min-height:94px}.brand{flex:none}.brand img{width:200px;height:52px}.header-inner nav{display:flex;align-items:center;gap:clamp(18px,2.1vw,34px);margin-inline:auto}.header-inner nav a{font-size:15px;white-space:nowrap;position:relative;padding:30px 0}.header-inner nav a[aria-current=page]:after{content:"";position:absolute;height:3px;background:var(--orange);inset:auto 0 17px}.header-note{font-size:12px;color:var(--muted);border-left:1px solid #cdd8d8;padding-left:20px;white-space:nowrap}.menu-toggle{display:none;border:1px solid #bccdd2;background:transparent;padding:8px 13px;border-radius:6px;color:var(--ink)}.eyebrow{display:block;color:var(--muted);font-size:13px;letter-spacing:.15em;font-weight:600;margin-bottom:17px}.hero{padding-top:68px}.hero-heading{max-width:1070px;margin-bottom:42px}.hero-heading h1{max-width:1040px}.hero-heading>p:not(.eyebrow){max-width:820px;font-size:18px;line-height:1.9;margin-bottom:25px}.button{display:inline-flex;align-items:center;justify-content:center;gap:26px;padding:13px 23px;border-radius:6px;font-weight:600;line-height:1.6}.button:hover{text-decoration:none;box-shadow:0 5px 20px #29465318}.button-orange{background:var(--orange);color:#243d48}.hero-band{display:grid;grid-template-columns:1fr 1.05fr;gap:44px;align-items:start}.hero-photo img{width:100%;border-radius:var(--radius);aspect-ratio:4/3}.preflight{padding:6px 0 0}.check-list{list-style:none;padding:0;margin:0}.check-list li{display:flex;gap:19px;border-bottom:1px solid #d7dfe0;padding:18px 0;margin:0}.check-list li:first-child{padding-top:0}.check-list li>span{color:#ad6636;font-size:13px;padding-top:5px;letter-spacing:.08em}.check-list h2{font-size:20px;margin-bottom:6px}.check-list p{font-size:15px;line-height:1.8;color:var(--muted);margin-bottom:0}.hero-links{display:flex;gap:27px;flex-wrap:wrap;margin-top:22px;font-size:15px;font-weight:600}.home-section{padding-top:85px;margin-top:18px}.section-heading{display:flex;align-items:flex-start;gap:20px}.section-heading:before{content:"";width:30px;height:3px;background:var(--orange);flex:none;margin-top:20px}.section-heading h2{max-width:1020px}.process-layout{display:grid;grid-template-columns:1.18fr 1fr;gap:48px;align-items:start}.process-list>div{border-bottom:1px solid var(--line);padding:0 0 20px;margin-bottom:24px;position:relative;padding-left:44px}.process-list>div:last-child{margin-bottom:0}.icon{width:24px;height:24px;flex:none;display:inline-block;vertical-align:middle;margin-right:10px;object-fit:contain}.process-list>div>.icon{position:absolute;left:0;top:3px}.process-list h3{font-size:21px}.process-list p{margin-bottom:12px}.process-photo img{width:100%;border-radius:var(--radius)}.free-section{background:var(--sky);padding:44px;margin-top:75px;border-radius:var(--radius)}.table-scroll{max-width:100%;overflow-x:auto;border:1px solid #d3dede;border-radius:8px;margin:0 0 24px;background:#fff}table{border-collapse:collapse;width:100%;font-size:15px;line-height:1.8;text-align:left}th,td{vertical-align:top;padding:17px 20px;border-bottom:1px solid var(--line)}thead th{background:#edf2f2;color:var(--ink);font-size:13px;font-weight:650;letter-spacing:.03em}tbody th{font-weight:600;color:var(--ink);width:22%}tr:last-child>th,tr:last-child>td{border-bottom:0}.home-news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.news-card{background:white;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;min-width:0}.news-image{display:block;overflow:hidden}.news-image img{aspect-ratio:3/2;width:100%;object-fit:cover;transition:transform .3s}.news-image:hover img{transform:scale(1.025)}.news-copy{padding:23px;display:flex;flex:1;flex-direction:column}.category{display:flex;align-items:center;color:#657983;gap:4px;font-size:12px;font-weight:600;letter-spacing:.08em;margin-bottom:13px}.category .icon{width:16px;height:16px;margin-right:5px}.news-copy h3{font-size:20px;line-height:1.6;margin-bottom:13px}.news-copy p{font-size:14px;color:var(--muted);line-height:1.9;margin-bottom:22px}.news-copy .text-link{margin-top:auto;font-size:13px;font-weight:600}.route-layout{display:grid;grid-template-columns:1.1fr 1fr;gap:34px;align-items:start}.route-layout img{width:100%;border-radius:var(--radius)}.route-layout table{font-size:14px}.route-layout th,.route-layout td{padding:14px}.route-figure{margin:30px 0;background:#edf3f3;border:1px solid #dbe5e5;border-radius:8px;padding:18px}.route-figure img{width:100%;height:auto}.quality-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;margin:28px 0 15px}.quality-strip>div{border-top:2px solid #b7cbd4;padding-top:20px}.quality-strip h3{font-size:19px}.quality-strip p{font-size:15px}.device-intro{display:grid;grid-template-columns:1fr 1fr;gap:42px;align-items:start;margin-bottom:30px}.device-intro img{border-radius:var(--radius);width:100%}.device-intro>div:last-child{padding-top:8px}.device-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-block:1px solid #d3dddd}.device-grid>div{padding:28px 22px;border-right:1px solid #d3dddd}.device-grid>div:first-child{padding-left:0}.device-grid>div:last-child{border-right:0}.device-grid .icon{margin-bottom:16px}.device-grid h3{font-size:20px}.device-grid p{font-size:14px;margin-bottom:0}.diagnosis-layout{display:grid;grid-template-columns:1fr 1.12fr;gap:40px;align-items:start}.diagnosis-layout img{width:100%;border-radius:var(--radius);margin-bottom:24px}.diagnosis-layout table{font-size:14px}.diagnosis-layout th,.diagnosis-layout td{padding:14px}.diagnosis-layout tbody th{width:38%}.faq-list{border-top:1px solid #cdd9db}.faq-list details{padding:22px 0;border-bottom:1px solid #cdd9db}.faq-list summary{font-weight:600;font-size:18px;color:var(--ink);cursor:pointer;list-style:none;position:relative;padding-right:38px}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";position:absolute;right:8px;top:0;color:#8b5f3e;font-size:24px;font-weight:400}.faq-list details[open] summary:after{content:"−"}.faq-list details p{margin:15px 38px 0 0;font-size:15px;color:var(--muted);max-width:1010px}.topic-index{border-top:1px solid #d1dddd}.topic-index>a{display:grid;grid-template-columns:45px 1fr 25px;align-items:center;gap:18px;padding:24px 0;border-bottom:1px solid #d1dddd}.topic-index>a:hover{background:#f0f3f0;text-decoration:none}.index-number{font-size:13px;color:#9a6f4c}.topic-index h3{font-size:19px;margin-bottom:5px}.topic-index p{font-size:14px;color:var(--muted);margin:0}.continue-section{background:var(--sky);border-radius:var(--radius);padding:36px 42px;margin:75px 0 80px}.continue-section h2{font-size:26px}.continue-section p{max-width:1000px}.reading-path{display:flex;flex-wrap:wrap;gap:16px 25px;font-size:14px;font-weight:600}.site-footer{border-top:1px solid var(--line)}.footer-upper{display:grid;grid-template-columns:1.8fr 1fr 1fr 1.15fr;gap:35px;padding-block:48px}.footer-intro p{font-size:23px;color:var(--ink);font-weight:600;margin-bottom:10px}.footer-intro>span:last-child{font-size:13px;color:var(--muted)}.footer-intro .eyebrow{font-size:12px;margin-bottom:10px}.footer-group h2{font-size:14px;margin-bottom:15px;letter-spacing:0}.footer-group a{display:block;font-size:13px;margin:6px 0;color:#536773}.copyright-bar{background:var(--ink);color:#e5eded;padding:18px 0}.copyright-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:11px;line-height:1.7}.registrations{display:flex;align-items:center;gap:22px;white-space:nowrap}.inner-main{padding-bottom:80px}.breadcrumbs{display:flex;gap:12px;flex-wrap:wrap;font-size:12px;color:var(--muted);padding:26px 0}.page-heading{margin:36px 0 34px;max-width:1120px}.page-heading h1{font-size:clamp(31px,3.5vw,46px)}.intro-band{display:grid;grid-template-columns:1.12fr 1fr;gap:44px;align-items:start;margin:0 0 56px}.intro-band img{border-radius:var(--radius);width:100%}.intro-copy>p,.plain-intro p{font-size:18px;line-height:1.95;color:#52646c}.lead-notes{border-top:1px solid #cdd9db;padding-top:20px;margin-top:25px}.lead-notes h2{font-size:15px;margin-bottom:12px;letter-spacing:.06em}.lead-notes ul{padding-left:18px;font-size:14px;color:var(--muted);margin-bottom:0}.lead-notes li{margin-bottom:5px}.article-content{max-width:900px;margin-inline:auto}.article-content .reading-section{margin:40px 0}.article-content .reading-section h2{font-size:27px;margin-bottom:20px}.article-content h3{font-size:20px}.article-content p{line-height:2}.article-content .table-scroll{margin-block:25px}.article-content table{min-width:570px}.article-content tbody th{width:21%}.plain-intro{max-width:900px;margin:0 auto 35px}.steps{counter-reset:step;list-style:none;padding:0}.steps>li{position:relative;border-left:1px solid #c5d7df;padding:0 0 25px 32px;margin-left:14px;margin-bottom:0}.steps>li:before{counter-increment:step;content:counter(step,decimal-leading-zero);background:var(--paper);color:#a4663c;font-size:12px;position:absolute;left:-12px;top:3px;padding-block:4px}.steps>li:last-child{border-left-color:transparent}.steps>li p{margin-bottom:10px}.symptom-index{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-bottom:25px}.symptom-index a{background:#edf3f3;border:1px solid #dce6e6;border-radius:6px;padding:10px 13px;font-size:13px}.issue{border-top:1px solid #d4dfe1;padding-top:25px;margin-top:25px;scroll-margin-top:25px}.issue h3{margin-bottom:14px}.issue strong{color:var(--ink);font-weight:600}.issue p{margin-bottom:12px}.issue p:last-child{font-size:14px}.article-pagination{display:flex;justify-content:space-between;gap:25px;border-block:1px solid #ccdadd;padding:24px 0;margin-top:40px;font-size:14px}.article-pagination>span{color:var(--muted)}.related{margin:30px 0}.related h2{font-size:19px;margin-bottom:13px}.related a{font-size:14px}.external-index{max-width:900px;margin:45px auto 0;border-top:1px solid #ccdadd;padding-top:25px}.external-index h2{font-size:21px}.external-index p{font-size:13px;color:var(--muted)}.external-index>div{display:flex;flex-wrap:wrap;gap:12px 25px}.external-index a{font-size:14px}.news-intro{max-width:900px}.news-intro>p{font-size:18px;color:#52646c}.category-nav{display:flex;flex-wrap:wrap;gap:10px;margin-block:24px 40px}.category-nav a{font-size:13px;padding:7px 15px;border:1px solid #c8d8de;border-radius:5px}.news-index{border-top:1px solid #ccdadd}.news-index article{display:grid;grid-template-columns:1fr 1.5fr;align-items:start;gap:38px;padding:32px 0;border-bottom:1px solid #ccdadd;scroll-margin-top:24px}.news-index img{border-radius:10px;aspect-ratio:3/2;width:100%;object-fit:cover}.news-index h2{font-size:25px;margin-bottom:15px}.news-index p{font-size:15px;color:var(--muted)}.news-index article>div{padding-top:7px}.news-index article>div>a{font-size:14px}.news-index+.reading-section{margin-top:45px}.news-index+.reading-section h2{font-size:27px}
@media(min-width:1500px){.hero-band{gap:60px}.preflight{padding-top:12px}.check-list li{padding-block:20px}.check-list p{font-size:16px}}
@media(max-width:1150px){.header-note{display:none}.header-inner{gap:24px}.container{width:calc(100% - 64px)}.header-inner nav{gap:23px;margin-left:auto;margin-right:0}.hero-band{gap:30px;grid-template-columns:1fr 1fr}.hero{padding-top:52px}.preflight .eyebrow{margin-bottom:13px}.check-list li{padding:12px 0;gap:12px}.check-list h2{font-size:18px}.check-list p{font-size:14px}.hero-links{gap:14px;font-size:14px}.process-layout{gap:30px}.footer-upper{gap:24px}.copyright-inner{font-size:10px}.registrations{gap:12px}.device-intro{gap:30px}.diagnosis-layout{gap:28px}}
@media(max-width:920px){.home-news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.header-inner{flex-wrap:wrap;padding-block:15px;min-height:80px;gap:15px}.brand img{width:183px;height:auto}.menu-toggle{display:inline-flex;gap:18px;margin-left:auto;align-items:center}.header-inner nav{width:100%;margin:0;justify-content:space-between;gap:12px;border-top:1px solid var(--line)}.header-inner nav a{padding:13px 0;font-size:14px}.header-inner nav a[aria-current=page]:after{bottom:4px}.js .header-inner nav{display:none}.js .header-inner nav.is-open{display:flex}.hero-band{gap:28px;grid-template-columns:1fr 1fr}.preflight{padding:0}.check-list p{font-size:13px;line-height:1.7}.check-list h2{font-size:17px}.check-list li{padding:10px 0}.hero-links{margin-top:14px}.hero-heading{margin-bottom:32px}.hero-heading h1{font-size:43px}.home-section{padding-top:60px}.free-section{padding:30px;margin-top:60px}.process-layout{grid-template-columns:1.15fr 1fr;gap:26px}.process-list h3{font-size:19px}.process-list p{font-size:14px}.route-layout{grid-template-columns:1fr;gap:20px}.route-layout>div:last-child{max-width:680px}.quality-strip{gap:20px}.quality-strip p{font-size:14px}.device-intro{grid-template-columns:1fr 1fr;gap:25px}.device-intro p{font-size:14px}.device-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.device-grid>div:nth-child(2){border-right:0}.device-grid>div:nth-child(3){padding-left:0;border-top:1px solid #d3dddd}.device-grid>div:nth-child(4){border-top:1px solid #d3dddd}.diagnosis-layout{grid-template-columns:1fr;gap:25px}.diagnosis-layout>div:first-child{display:grid;grid-template-columns:1fr 1fr;gap:25px;align-items:start}.diagnosis-layout>div:first-child p{font-size:14px}.continue-section{padding:30px;margin-block:60px}.footer-upper{grid-template-columns:1.3fr 1fr 1fr;gap:28px}.footer-intro{grid-column:1/-1}.copyright-inner{gap:10px;flex-wrap:wrap;font-size:11px}.intro-band{grid-template-columns:1.05fr 1fr;gap:28px}.intro-copy>p{font-size:16px}.lead-notes{padding-top:15px;margin-top:15px}.lead-notes ul{font-size:13px}.article-content .reading-section h2{font-size:25px}.news-index article{grid-template-columns:1fr 1.3fr;gap:26px}.news-index h2{font-size:22px}}
@media(max-width:680px){.container{width:calc(100% - 36px)}.header-inner{width:calc(100% - 36px)}.header-inner nav,.js .header-inner nav.is-open{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 16px}.hero{padding-top:35px}.hero-heading h1{font-size:34px;line-height:1.45;letter-spacing:-.035em}.hero-heading>p:not(.eyebrow){font-size:16px}.eyebrow{font-size:11px}.hero-band{grid-template-columns:1fr;gap:25px}.hero-photo img{width:100%}.preflight{padding:0}.check-list li{padding:16px 0;gap:17px}.check-list h2{font-size:19px}.check-list p{font-size:14px}.hero-links{font-size:15px;gap:25px}.home-section{padding-top:48px;margin-top:10px}.section-heading{gap:13px}.section-heading:before{width:20px;margin-top:17px}.section-heading h2{font-size:25px}.process-layout{grid-template-columns:1fr;gap:25px}.process-list p{font-size:15px}.process-photo{max-width:100%}.free-section{padding:25px 20px;margin-top:45px}.free-section .section-heading{gap:10px}.free-section .section-heading:before{width:15px}.free-section h2{font-size:23px}.free-section table{min-width:540px}th,td{padding:14px;font-size:14px}.quality-strip{grid-template-columns:1fr;gap:5px}.quality-strip>div{padding-top:16px}.route-figure{padding:10px 4px}.device-intro{grid-template-columns:1fr;gap:25px}.device-intro p{font-size:16px}.device-grid>div{padding:22px 15px}.device-grid p{font-size:13px}.diagnosis-layout>div:first-child{display:block}.diagnosis-layout>div:first-child p{font-size:15px}.diagnosis-layout table{min-width:460px}.faq-list summary{font-size:17px}.faq-list details p{margin-right:10px}.topic-index>a{gap:12px;grid-template-columns:28px 1fr 18px;padding:20px 0}.topic-index h3{font-size:18px}.topic-index p{font-size:13px}.continue-section{padding:25px 20px;margin:45px 0 50px}.continue-section h2{font-size:23px}.continue-section p{font-size:15px}.footer-upper{grid-template-columns:1fr 1fr;gap:28px;padding-block:35px}.footer-group:last-child{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;column-gap:25px}.footer-group:last-child h2{grid-column:1/-1}.copyright-inner{align-items:flex-start;gap:12px}.registrations{flex-wrap:wrap;white-space:normal;gap:6px 18px}.copyright-bar{padding:20px 0}.page-heading{margin:20px 0 25px}.page-heading h1{font-size:31px}.breadcrumbs{padding-block:22px;font-size:11px}.intro-band{grid-template-columns:1fr;gap:25px;margin-bottom:30px}.intro-copy>p,.plain-intro p{font-size:17px}.lead-notes{padding-top:18px;margin-top:20px}.lead-notes ul{font-size:14px}.article-content .reading-section{margin-block:32px}.article-content .reading-section h2{font-size:24px}.article-content p{font-size:15px;line-height:2}.symptom-index{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.symptom-index a{font-size:12px;padding:10px}.article-pagination{font-size:12px;gap:15px}.related a{font-size:13px}.news-index article{grid-template-columns:1fr;gap:20px;padding-block:25px}.news-index article>div{padding:0}.news-index h2{font-size:23px}.inner-main{padding-bottom:50px}}
@media(max-width:620px){.home-news-grid{grid-template-columns:minmax(0,1fr)}.news-copy{padding:23px}.news-copy h3{font-size:22px}.news-copy p{font-size:15px}.news-copy .text-link{font-size:14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}