.prk-page{--ink:#17314b;--muted:#607185;--blue:#1246a0;--navy:#09294b;--line:#d9e3ed;--pale:#f2f6fa;color:var(--ink);font:15px/1.85 "PingFang SC","Microsoft YaHei",Arial,sans-serif;background:#fff}
.prk-page *,.prk-page *::before,.prk-page *::after{box-sizing:border-box}
.prk-page h1,.prk-page h2,.prk-page h3,.prk-page p,.prk-page figure{margin:0}
.prk-page h1{font-size:clamp(34px,3.6vw,50px);line-height:1.3;font-weight:700;letter-spacing:.015em;margin-bottom:23px}
.prk-page h2{font-size:clamp(24px,2.3vw,33px);line-height:1.45;font-weight:650;margin-bottom:20px;letter-spacing:.01em}
.prk-page h3{font-size:20px;line-height:1.5;font-weight:650;margin-bottom:12px}
.prk-page p{color:var(--muted);margin-bottom:15px;overflow-wrap:anywhere}
.prk-page a{color:var(--blue);text-underline-offset:5px;text-decoration:none}
.prk-page a:hover{text-decoration:underline}
.prk-page a:focus-visible,.prk-page summary:focus-visible,.prk-page .page-table-wrap:focus-visible{outline:3px solid #5c9bff;outline-offset:4px}
.prk-page [id]{scroll-margin-top:140px}
.prk-page img{display:block;width:100%;height:auto;object-fit:contain}
.prk-page .page-shell{width:min(100% - 80px,1280px);margin-inline:auto}
.prk-page .page-split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);align-items:center;gap:52px}
.prk-page .page-split>*{min-width:0}

/* Product opening: full photographs, business copy and an explicit information strip. */
.prk-page .page-hero{position:relative;isolation:isolate;padding:0 0 46px;background:linear-gradient(112deg,#09294b 0%,#123f72 70%,#194c80 100%);color:#fff;overflow:hidden}
.prk-page .page-hero::before{content:"";position:absolute;z-index:-1;inset:0;background:linear-gradient(135deg,transparent 72%,rgba(255,255,255,.04) 72%);pointer-events:none}
.prk-page .page-hero .page-split{grid-template-columns:minmax(0,.96fr) minmax(0,1.12fr);gap:54px;align-items:center}
.prk-page .page-breadcrumb{display:flex;align-items:center;gap:9px;flex-wrap:wrap;font-size:12px;color:var(--muted)}
.prk-page .page-hero-breadcrumb{padding-block:22px 30px}
.prk-page .page-hero .page-breadcrumb{color:#b5c8dc}
.prk-page .page-hero .page-breadcrumb a{color:#d6e3ee}
.prk-page .page-hero-copy{padding-block:8px}
.prk-page .page-hero-copy>p{color:#d3dfec;font-size:14px;line-height:1.95}
.prk-page .page-hero .page-lead{font-size:16px;line-height:1.95;color:#edf4fb}
.prk-page .page-kicker{color:var(--blue);font-size:12px;font-weight:700;letter-spacing:.09em;margin-bottom:14px}
.prk-page .page-hero .page-kicker{display:inline-block;color:#dbeafe;border-left:3px solid #6aa7f5;padding:2px 0 2px 12px;font-size:12px;line-height:1.6;margin-bottom:19px}
.prk-page .page-hero .page-photo{padding:11px 11px 0;background:#fff;border:1px solid rgba(255,255,255,.35);box-shadow:0 16px 40px rgba(0,17,39,.2)}
.prk-page .page-hero .page-photo img{width:100%;height:auto;max-height:510px;aspect-ratio:auto;object-fit:contain;background:#edf2f6}
.prk-page .page-hero figcaption{padding:11px 4px 12px;color:#5d7085;font-size:11px}
.prk-page .page-core-wrap{margin-top:33px}
.prk-page .page-core-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin:0;background:#fff;border-top:3px solid #4380cf;box-shadow:0 8px 24px rgba(0,17,39,.12)}
.prk-page .page-core-strip>div{padding:20px 25px;border:0;border-right:1px solid var(--line);min-width:0}
.prk-page .page-core-strip>div:last-child{border-right:0}
.prk-page .page-core-strip dt{color:var(--blue);font-size:12px;font-weight:700;margin-bottom:5px}
.prk-page .page-core-strip dd{color:var(--ink);font-size:14px;font-weight:550;line-height:1.7;margin:0}
.prk-page .page-lead{font-size:16px;line-height:1.9;max-width:740px}

/* The local table of contents is static HTML and needs no script. */
.prk-page .page-local-nav{background:#fff;border-bottom:1px solid #ccd9e7;box-shadow:0 5px 15px rgba(15,42,72,.045)}
.prk-page .page-local-nav-inner{display:flex;align-items:stretch;gap:25px;min-width:0}
.prk-page .page-local-nav-label{display:flex;align-items:center;flex:none;font-size:12px;font-weight:700;letter-spacing:.04em;color:#708299;margin:0;padding:21px 0}
.prk-page .page-local-nav-list{display:flex;flex:1;align-items:stretch;list-style:none;margin:0;padding:0;min-width:0;overflow-x:auto;scrollbar-width:thin}
.prk-page .page-local-nav-list li{display:flex;flex:1;min-width:max-content;border-left:1px solid #e4ebf2}
.prk-page .page-local-nav-list a{display:flex;align-items:center;justify-content:center;gap:11px;width:100%;padding:21px 20px;color:#304963;font-size:13px;font-weight:600;white-space:nowrap;border-bottom:3px solid transparent}
.prk-page .page-local-nav-list a:hover{color:var(--blue);background:#f1f6fb;border-bottom-color:var(--blue);text-decoration:none}
.prk-page .page-local-nav-number{font-size:11px;font-weight:700;color:#8194aa;font-variant-numeric:tabular-nums}

/* Section rhythm: titles, practical lists, tables, process and questions. */
.prk-page .page-section{padding-block:68px;border-bottom:1px solid #edf1f5}
.prk-page .page-tint{background:var(--pale)}
.prk-page .page-heading{margin-bottom:32px;max-width:930px}
.prk-page .page-heading>p:not(.page-kicker){font-size:15px}
.prk-page .page-heading-line{display:flex;align-items:flex-start;gap:17px;margin-bottom:20px}
.prk-page .page-heading-line h2{margin-bottom:0;min-width:0}
.prk-page .page-section-index{display:inline-flex;align-items:center;justify-content:center;flex:0 0 38px;height:38px;margin-top:3px;background:var(--blue);color:#fff;font-size:16px;line-height:1;font-weight:600;font-variant-numeric:tabular-nums;box-shadow:4px 4px 0 #d9e7f7}
.prk-page .page-heading .page-kicker{margin-bottom:12px}
.prk-page .page-section-detail>.page-shell>.page-split,.prk-page .page-section-detail>.page-shell.page-split{align-items:center}
.prk-page .page-section-specifications{background:#edf3f9}
.prk-page .page-section-specifications .page-split{align-items:start;grid-template-columns:minmax(0,1.18fr) minmax(0,.82fr)}
.prk-page .page-section-specifications .page-photo{margin-bottom:25px}
.prk-page .page-section-process{background:#fff}
.prk-page .page-section-process .page-split{align-items:start}
.prk-page .page-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-top:25px}
.prk-page .page-button{display:inline-flex;justify-content:center;align-items:center;gap:16px;min-height:48px;padding:12px 23px;font-size:14px;font-weight:650;background:var(--blue);color:#fff;border:1px solid var(--blue);transition:background .18s ease,border-color .18s ease}
.prk-page .page-button:hover{background:#0a337c;border-color:#0a337c;text-decoration:none}
.prk-page .page-button.secondary{background:transparent;color:var(--blue);border-color:#b6c9dd}
.prk-page .page-button.secondary:hover{background:#e5eef9;border-color:#8eaac8}
.prk-page .page-hero .page-button{background:#fff;color:#123e78;border-color:#fff}
.prk-page .page-hero .page-button:hover{background:#e9f2ff;border-color:#e9f2ff}
.prk-page .page-hero .page-button.secondary{background:transparent;color:#fff;border-color:#6787aa}
.prk-page .page-hero .page-button.secondary:hover{background:rgba(255,255,255,.1);border-color:#b0c9e2}
.prk-page .page-text-link{display:inline-flex;align-items:center;min-height:40px;font-size:14px;font-weight:650}

/* Preserve complete product photographs, including portrait detail views. */
.prk-page .page-photo{overflow:hidden;min-width:0;background:#f3f6f9;border:1px solid #e1e8ef}
.prk-page .page-photo img{width:100%;height:auto;max-height:530px;aspect-ratio:auto;object-fit:contain;background:#edf2f6}
.prk-page .page-photo a{display:block}
.prk-page figcaption{color:#617287;font-size:11px;line-height:1.7;padding:12px 15px;overflow-wrap:anywhere;background:#fff;border-top:1px solid #e6ecf2}
.prk-page .page-grid{display:grid;gap:25px;align-items:stretch}
.prk-page .page-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.prk-page .page-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}
.prk-page .page-grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}
.prk-page .page-grid>*{min-width:0}
.prk-page .page-card{background:#fff;min-width:0;overflow:hidden;border:1px solid var(--line)}
.prk-page .page-card-media{border:0;border-bottom:3px solid #d3e0ec;background:#fff;box-shadow:0 5px 18px rgba(17,46,78,.045)}
.prk-page .page-card>img,.prk-page .page-card>a>img,.prk-page .page-card .page-photo img{aspect-ratio:4/3;max-height:420px;object-fit:contain;background:#eaf0f5}
.prk-page .page-card .page-photo{border:0}
.prk-page .page-card-media>.page-card-body{padding:23px 24px 24px}
.prk-page .page-card-body{padding:23px}
.prk-page .page-card-body p{font-size:14px}
.prk-page .page-card-body>p:last-child{margin-bottom:0}
.prk-page .page-card>h3,.prk-page .page-card>p,.prk-page .page-card>ul,.prk-page .page-card>.page-text-link{margin:18px 22px}
.prk-page .page-card figcaption{padding-inline:18px;font-size:11px}
.prk-page .page-card-text{border:0;border-top:2px solid #2b63ac;background:#f1f5fa;box-shadow:none}
.prk-page .page-card-index{display:block;color:#718aa4;font-size:11px;font-weight:700;letter-spacing:.06em;margin-bottom:11px}
.prk-page .page-card-text h3{font-size:18px;margin-bottom:10px}
.prk-page .page-card-text p{font-size:13px;line-height:1.85}
.prk-page .page-feature-list{padding-left:1.3em;color:var(--muted);margin:20px 0 25px}
.prk-page .page-feature-list li{margin-bottom:11px;line-height:1.9}
.prk-page .page-feature-list strong{color:var(--ink);font-weight:650}
.prk-page .page-checklist{list-style:none;padding:0;border-top:1px solid var(--line)}
.prk-page .page-checklist>li{position:relative;margin:0;padding:13px 0 13px 20px;border-bottom:1px solid var(--line);font-size:14px}
.prk-page .page-checklist>li::before{content:"";position:absolute;left:0;top:24px;width:6px;height:6px;background:var(--blue)}
.prk-page .page-process-list{list-style:none;padding:0;margin:0;counter-reset:delivery}
.prk-page .page-process-list>li{position:relative;counter-increment:delivery;padding:0 0 22px 63px;margin:0;border-left:1px solid #c7d8e9;margin-left:20px}
.prk-page .page-process-list>li:last-child{border-left-color:transparent;padding-bottom:0}
.prk-page .page-process-list>li::before{content:counter(delivery,decimal-leading-zero);position:absolute;left:-21px;top:0;width:42px;height:42px;display:flex;align-items:center;justify-content:center;background:#e9f0f9;border:1px solid #c1d4eb;color:var(--blue);font-size:14px;font-weight:700}
.prk-page .page-process-list h3{padding-top:3px;margin-bottom:9px;font-size:19px}
.prk-page .page-process-list p{font-size:14px;line-height:1.85;margin:0}
.prk-page .page-facts:not(.page-core-strip){display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 24px;margin:24px 0}
.prk-page .page-facts:not(.page-core-strip)>div{border-top:1px solid #cbd9e7;padding:17px 0 18px;min-width:0}
.prk-page dt{color:var(--blue);font-size:12px;font-weight:650}
.prk-page dd{margin:6px 0 0;font-size:14px;line-height:1.85;color:var(--ink);overflow-wrap:anywhere}
.prk-page .page-table-wrap{width:100%;overflow-x:auto;border:1px solid #c9d7e5;background:#fff;margin:22px 0;scrollbar-width:thin;box-shadow:0 7px 20px rgba(22,51,86,.045)}
.prk-page .page-table{border-collapse:collapse;width:100%;font-size:13px;text-align:left}
.prk-page .page-table caption{text-align:left;padding:18px 22px;background:#fff;color:var(--navy);font-size:15px;font-weight:700;border-bottom:3px solid var(--blue)}
.prk-page .page-table th,.prk-page .page-table td{padding:17px 20px;border-bottom:1px solid #dce5ee;vertical-align:top;min-width:110px;line-height:1.85}
.prk-page .page-table thead th{background:var(--navy);color:#fff;font-size:12px;font-weight:600;letter-spacing:.025em}
.prk-page .page-table tbody th{background:#f1f5fa;color:#244d79;font-size:13px;font-weight:650;white-space:normal}
.prk-page .page-table td{color:#53687e}
.prk-page .page-table tbody tr:nth-child(even) td{background:#f8fafc}
.prk-page .page-table tr:last-child th,.prk-page .page-table tr:last-child td{border-bottom:0}
.prk-page .page-faq{border-top:2px solid var(--blue);counter-reset:question}
.prk-page .page-faq details{border-bottom:1px solid #cfdae6;counter-increment:question}
.prk-page .page-faq summary{position:relative;display:flex;align-items:flex-start;gap:13px;font-weight:650;font-size:15px;line-height:1.7;cursor:pointer;list-style:none;padding:20px 32px 20px 0}
.prk-page .page-faq summary::-webkit-details-marker{display:none}
.prk-page .page-faq summary::before{content:counter(question,decimal-leading-zero);flex:0 0 26px;color:#7692b0;font-size:12px;font-weight:600;line-height:2.15}
.prk-page .page-faq summary::after{content:"+";position:absolute;right:0;top:17px;color:var(--blue);font-size:23px;font-weight:400}
.prk-page .page-faq details[open] summary::after{content:"−"}
.prk-page .page-faq details[open] summary{color:var(--blue)}
.prk-page .page-faq details p{font-size:14px;margin:0;padding:0 22px 21px 39px;line-height:1.95}
.prk-page .page-note{font-size:12px;color:#6a7e94;margin-top:15px}
.prk-page .page-badge{display:inline-block;background:#e8eff9;color:var(--blue);padding:4px 10px;font-size:11px;font-weight:650;letter-spacing:.03em;margin-bottom:14px}

/* A clear final enquiry area, visually distinct from product and technical content. */
.prk-page .page-contact{background:var(--navy);color:#fff}
.prk-page .page-contact p{color:#c0d0e0}
.prk-page .page-contact .page-kicker{color:#87b9f6}
.prk-page .page-contact a{color:#daeaff}
.prk-page .page-contact .page-section-index{background:#fff;color:var(--blue);box-shadow:4px 4px 0 #345b83}
.prk-page .page-contact .page-button{background:#fff;border-color:#fff;color:#123e78}
.prk-page .page-contact .page-button:hover{background:#e6f0ff}
.prk-page .page-contact .page-button.secondary{background:transparent;border-color:#6e8caa;color:#fff}
.prk-page .page-contact .page-button.secondary:hover{background:rgba(255,255,255,.1)}
.prk-page .page-contact a[href^="tel:"]{font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.prk-page .page-contact .page-facts>div{border-color:#365573}
.prk-page .page-contact dt{color:#8eb8e5}
.prk-page .page-contact dd{color:#edf5fd}
.prk-page .page-contact .page-card{color:var(--ink);background:#fff;border-color:#7b97b3}
.prk-page .page-contact .page-card p{color:var(--muted)}
.prk-page .page-contact .page-card a{color:var(--blue)}
.prk-page .page-contact .page-faq{border-color:#4d759d;margin-bottom:40px}
.prk-page .page-contact .page-faq details{border-color:#355879}
.prk-page .page-contact .page-faq summary,.prk-page .page-contact .page-faq details[open] summary{color:#fff}
.prk-page .page-contact .page-faq summary::before,.prk-page .page-contact .page-faq summary::after{color:#94bff3}
.prk-page .page-section>.page-shell>.page-contact{margin-top:40px;padding:35px 40px}
.prk-page .page-section>.page-shell>.page-contact h2{font-size:26px}
.prk-page .page-section>.page-shell>.page-contact .page-facts{margin-bottom:12px}
.prk-page .page-contact .page-grid{margin-top:28px}
.prk-page .page-solutions #main-products .page-card-body{padding:28px}
.prk-page .page-solutions #main-products h3{font-size:24px}
.prk-page .page-solutions .page-section-gallery .page-grid.three{gap:28px}

@media(max-width:1100px){
 .prk-page .page-shell{width:calc(100% - 56px)}
 .prk-page .page-split,.prk-page .page-hero .page-split{gap:32px}
 .prk-page .page-hero .page-split{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
 .prk-page .page-local-nav-inner{gap:18px}.prk-page .page-local-nav-list a{padding-inline:15px;gap:8px}
 .prk-page .page-grid{gap:19px}.prk-page .page-card-body,.prk-page .page-card-media>.page-card-body{padding:20px}
 .prk-page h3{font-size:18px}.prk-page .page-grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}
 .prk-page .page-core-strip>div{padding:17px 20px}.prk-page .page-section-specifications .page-split{grid-template-columns:1.08fr .92fr}
}
@media(max-width:800px){
 .prk-page .page-shell{width:calc(100% - 40px)}
 .prk-page .page-hero{padding-bottom:32px}.prk-page .page-hero-breadcrumb{padding-block:18px 21px}
 .prk-page .page-split,.prk-page .page-hero .page-split,.prk-page .page-section-specifications .page-split{grid-template-columns:1fr;gap:28px}
 .prk-page .page-hero-copy{padding:0}.prk-page .page-hero h1{max-width:660px;font-size:36px;line-height:1.35}
 .prk-page .page-hero .page-photo{max-width:680px;width:100%;margin-inline:auto}
 .prk-page .page-hero .page-photo img{max-height:480px;aspect-ratio:auto}
 .prk-page .page-core-wrap{margin-top:26px}.prk-page .page-core-strip>div{padding:16px 17px}
 .prk-page .page-local-nav-inner{display:block}.prk-page .page-local-nav-label{padding:12px 0 0;font-size:10px}
 .prk-page .page-local-nav-list li:first-child{border-left:0}.prk-page .page-local-nav-list a{justify-content:flex-start;padding:14px 18px 15px 12px;font-size:12px}
 .prk-page .page-section{padding-block:46px}.prk-page .page-heading{margin-bottom:27px}
 .prk-page .page-heading-line{gap:15px}.prk-page .page-section-index{flex-basis:34px;height:34px;font-size:14px;margin-top:2px}
 .prk-page h2{font-size:28px}.prk-page .page-grid.three{grid-template-columns:repeat(2,minmax(0,1fr))}
 .prk-page .page-section-process .page-photo{max-width:680px;margin-inline:auto;width:100%}
 .prk-page .page-process-list{margin-top:9px}.prk-page .page-faq details p{padding-right:0}
 .prk-page .page-section>.page-shell>.page-contact{padding:30px;margin-top:31px}
}
@media(max-width:560px){
 .prk-page{font-size:14px}.prk-page .page-shell{width:calc(100% - 32px)}
 .prk-page h1,.prk-page .page-hero h1{font-size:31px}.prk-page h2{font-size:24px;line-height:1.5}
 .prk-page .page-hero .page-lead{font-size:15px}.prk-page .page-hero-copy>p{font-size:13px}
 .prk-page .page-hero .page-kicker{font-size:11px}.prk-page .page-hero .page-photo{padding:7px 7px 0}
 .prk-page .page-hero .page-photo img{max-height:400px}.prk-page .page-hero figcaption{font-size:10px;padding:9px 3px 10px}
 .prk-page .page-core-strip{grid-template-columns:1fr}.prk-page .page-core-strip>div{display:grid;grid-template-columns:76px minmax(0,1fr);gap:12px;border:0;border-bottom:1px solid var(--line);padding:14px 17px}
 .prk-page .page-core-strip>div:last-child{border-bottom:0}.prk-page .page-core-strip dt{margin:0;line-height:1.9}.prk-page .page-core-strip dd{font-size:13px}
 .prk-page .page-local-nav-list{margin-inline:-3px}.prk-page .page-local-nav-list a{font-size:12px;padding-inline:12px;gap:7px}
 .prk-page .page-section{padding-block:36px}.prk-page .page-heading{margin-bottom:23px}
 .prk-page .page-heading-line{gap:13px;margin-bottom:18px}.prk-page .page-section-index{flex-basis:30px;height:30px;margin-top:3px;font-size:13px;box-shadow:3px 3px 0 #d9e7f7}
 .prk-page .page-grid.two,.prk-page .page-grid.three,.prk-page .page-grid.four{grid-template-columns:1fr}
 .prk-page .page-photo img{max-height:460px}.prk-page .page-card>img,.prk-page .page-card>a>img,.prk-page .page-card .page-photo img{aspect-ratio:4/3;max-height:380px}
 .prk-page .page-lead{font-size:14px}.prk-page .page-breadcrumb{font-size:11px;gap:7px}
 .prk-page .page-actions{gap:10px;margin-top:21px}.prk-page .page-button{font-size:13px;min-height:46px;padding:11px 17px}
 .prk-page .page-facts:not(.page-core-strip){grid-template-columns:1fr;margin-block:20px}.prk-page .page-facts:not(.page-core-strip)>div{padding-block:14px}
 .prk-page .page-faq summary{font-size:14px;padding-block:18px;gap:10px}.prk-page .page-faq summary::before{flex-basis:24px}
 .prk-page .page-faq details p{font-size:13px;padding-left:34px;padding-bottom:18px}
 .prk-page .page-checklist>li{font-size:13px;padding-block:12px}.prk-page .page-checklist>li::before{top:22px}
 .prk-page .page-process-list>li{padding-left:39px;margin-left:18px}.prk-page .page-process-list>li::before{left:-19px;width:38px;height:38px;font-size:13px}
 .prk-page .page-process-list h3{font-size:17px}.prk-page .page-process-list p{font-size:13px}
 .prk-page .page-table{min-width:480px}.prk-page .page-table caption{font-size:14px;padding:15px 17px}.prk-page .page-table th,.prk-page .page-table td{padding:14px 16px}
 .prk-page .page-card-body,.prk-page .page-card-media>.page-card-body{padding:21px}.prk-page .page-card-body p{font-size:13px}
 .prk-page .page-section>.page-shell>.page-contact{padding:25px 22px}.prk-page .page-section>.page-shell>.page-contact h2{font-size:23px}
 .prk-page .page-solutions #main-products .page-card-body{padding:23px}.prk-page .page-solutions #main-products h3{font-size:22px}
}
@media(prefers-reduced-motion:reduce){.prk-page *{scroll-behavior:auto!important;transition:none!important}}
/* Preserve complete product shapes in the main product comparison. */
.page-solutions .retractable-product-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.page-solutions .retractable-product-grid img{aspect-ratio:3/2;object-fit:contain;background:#edf1f4}.page-solutions .retractable-product-grid h3{font-size:22px}@media(max-width:760px){.page-solutions .retractable-product-grid{grid-template-columns:1fr}}
.prk-page .page-card>img,.prk-page .page-card>a>img,.prk-page .page-card .page-photo img{aspect-ratio:3/2}

/* Shared calculator workspace: all fields, definitions and formulas remain HTML. */
.prk-calculator [hidden]{display:none!important}
.prk-calculator .calc-hero{padding-bottom:28px}
.prk-calculator .calc-hero .page-hero-breadcrumb{padding-block:18px}
.prk-calculator .calc-hero .page-split{grid-template-columns:minmax(0,1fr) 270px;gap:42px}
.prk-calculator .calc-hero h1{font-size:clamp(28px,3vw,40px);margin-bottom:13px}
.prk-calculator .calc-hero p{color:#d8e6f5;margin-bottom:9px}
.prk-calculator .calc-hero .page-photo img{height:155px;object-fit:contain}
.prk-calculator .calc-hero figcaption{padding:7px 3px;font-size:10px}
.prk-calculator .calc-switch{display:flex;gap:0;border-bottom:1px solid var(--line);padding:12px 0}
.prk-calculator .calc-switch a{padding:12px 23px;color:var(--muted);font-size:13px;text-align:center;flex:1}
.prk-calculator .calc-switch a[aria-current]{background:#eaf2ff;color:var(--blue);font-weight:700}
.prk-calculator .calc-section{padding:38px 0 48px}
.prk-calculator .calc-section .page-heading{margin-bottom:24px}
.prk-calculator .calc-section .page-heading h2{font-size:27px;margin-bottom:0}
.prk-calculator .calc-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:26px;align-items:start}
.prk-calculator .calc-card{padding:28px;border:1px solid var(--line);background:#fff;min-width:0}
.prk-calculator .calc-form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 18px}
.prk-calculator .calc-field{display:block;font-weight:650;font-size:13px;min-width:0}
.prk-calculator .calc-field.full{grid-column:1/-1}
.prk-calculator .calc-field input,.prk-calculator .calc-field select{display:block;width:100%;min-height:48px;margin-top:7px;border:1px solid #b5c7d9;border-radius:0;background:#fff;color:var(--ink);font:16px/1.5 "Microsoft YaHei",sans-serif;padding:10px 12px;box-shadow:none}
.prk-calculator input::placeholder{font-size:12px;color:#778da2}
.prk-calculator input:focus,.prk-calculator select:focus,.prk-calculator textarea:focus{outline:2px solid #4380cf;outline-offset:2px}
.prk-calculator input[aria-invalid]{border-color:#b72d35}
.prk-calculator .calc-help{font-size:12px;line-height:1.8;color:#62778b;margin:14px 0}
.prk-calculator .calc-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.prk-calculator button{cursor:pointer;font:600 13px/1.6 "Microsoft YaHei",sans-serif}
.prk-calculator button:focus-visible{outline:3px solid #70a5f5;outline-offset:3px}
.prk-calculator button:disabled{cursor:not-allowed;opacity:.55}
.prk-calculator .calc-secondary{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 16px;border:1px solid #b5c7d9;background:#fff;color:var(--blue)}
.prk-calculator .calc-secondary:hover{background:#edf4ff}
.prk-calculator .calc-error{color:#a82730;font-size:13px;margin:12px 0 0}
.prk-calculator .calc-error:empty{display:none}
.prk-calculator .calc-fees{min-width:0;margin:23px 0 0;padding:15px 0 0;border:0;border-top:1px solid var(--line)}
.prk-calculator .calc-fees legend{font-size:14px;font-weight:650;padding:0 10px 0 0}
.prk-calculator .calc-fees .calc-help{margin-top:0}
.prk-calculator .calc-results{background:#f2f6fc;border-top:3px solid var(--blue)}
.prk-calculator .calc-result-kicker{font-size:11px;letter-spacing:.08em;color:var(--blue);font-weight:700;margin:0 0 12px}
.prk-calculator .calc-status{font-size:13px;min-height:24px;color:#405b76;margin-bottom:18px}
.prk-calculator .calc-empty{min-height:255px;display:flex;flex-direction:column;justify-content:center;text-align:center}
.prk-calculator .calc-empty strong{font-size:54px;font-weight:500;color:#94a9c1}
.prk-calculator .calc-empty small{font-size:16px}
.prk-calculator .calc-empty p{font-size:13px;margin-top:10px}
.prk-calculator .calc-total{display:flex;flex-wrap:wrap;align-items:baseline;gap:0 12px;padding:0 0 21px;color:var(--blue)}
.prk-calculator .calc-total>span:first-child{flex-basis:100%;font-size:13px;font-weight:600;margin-bottom:4px;color:#405b76}
.prk-calculator .calc-total strong{font-size:clamp(32px,3.6vw,48px);line-height:1.3;font-weight:650;overflow-wrap:anywhere;font-variant-numeric:tabular-nums}
.prk-calculator .calc-result-list{margin:0 0 17px}
.prk-calculator .calc-result-list>div{display:flex;gap:20px;justify-content:space-between;padding:11px 0;border-top:1px solid #d8e3ef;font-size:13px}
.prk-calculator .calc-result-list dt{color:#62778b;min-width:0}
.prk-calculator .calc-result-list dd{margin:0;text-align:right;font-weight:600;overflow-wrap:anywhere;min-width:0;font-variant-numeric:tabular-nums}
.prk-calculator .calc-formula,.prk-calculator .calc-pending{font-size:12px;border-left:3px solid #78a7e7;padding:10px 13px;background:#e6eefb;color:#345775;margin-bottom:18px}
.prk-calculator .calc-summary-label{font-size:12px;font-weight:650;display:block;margin-bottom:8px}
.prk-calculator textarea{resize:vertical;display:block;width:100%;min-height:110px;padding:11px 12px;margin-bottom:12px;border:1px solid #c9d7e5;background:#fff;font:12px/1.7 "Microsoft YaHei",sans-serif;color:#405b76}
.prk-calculator .calc-plan{margin-bottom:21px}
.prk-calculator .calc-plan p{font-size:12px;margin:12px 0 6px}
.prk-calculator .calc-plan-track{height:21px;display:flex;background:#dae5f2;border:1px solid #c2d0e1;overflow:hidden}
.prk-calculator .calc-plan-track span{display:block;background:#2d6cbe;height:100%}
.prk-calculator .calc-plan small{display:block;font-size:11px;color:#667d93;margin-top:9px;line-height:1.8}
.prk-calculator .calc-context{display:grid;grid-template-columns:230px minmax(0,1fr);gap:28px;align-items:center;margin-top:28px;padding:22px;background:#f5f7fa;border:1px solid #e1e8f0}
.prk-calculator .calc-context img{max-height:150px;width:100%;object-fit:contain}
.prk-calculator .calc-context h3{font-size:19px;margin-bottom:9px}
.prk-calculator .calc-context p{font-size:13px;margin-bottom:7px}
.prk-calculator .calc-context a{font-size:12px}
@media(max-width:900px){.prk-calculator .calc-layout{grid-template-columns:1fr}.prk-calculator .calc-hero .page-split{grid-template-columns:minmax(0,1fr) 210px;gap:24px}.prk-calculator .calc-empty{min-height:160px}.prk-calculator .calc-total strong{font-size:40px}}
@media(max-width:560px){.prk-calculator .calc-hero .page-split{grid-template-columns:1fr;gap:18px}.prk-calculator .calc-hero .page-photo{display:grid;grid-template-columns:110px 1fr;gap:12px;align-items:center;padding:8px}.prk-calculator .calc-hero .page-photo img{height:85px}.prk-calculator .calc-hero figcaption{font-size:11px}.prk-calculator .calc-hero h1{font-size:29px;margin-bottom:12px}.prk-calculator .calc-hero .page-lead{font-size:14px}.prk-calculator .calc-hero p{font-size:12px}.prk-calculator .calc-switch a{font-size:11px;padding:11px 6px}.prk-calculator .calc-card{padding:20px 17px}.prk-calculator .calc-form-grid{gap:17px 12px}.prk-calculator .calc-field{font-size:12px}.prk-calculator .calc-field input,.prk-calculator .calc-field select{padding:10px 8px}.prk-calculator .calc-section{padding:28px 0}.prk-calculator .calc-section .page-heading h2{font-size:23px}.prk-calculator .calc-context{grid-template-columns:1fr;padding:17px;gap:17px}.prk-calculator .calc-context img{max-height:170px}.prk-calculator .calc-total strong{font-size:34px}.prk-calculator .calc-result-list>div{gap:12px;font-size:12px}.prk-calculator .calc-actions{gap:8px}.prk-calculator .calc-actions button{padding:11px 12px}}

/* Calculator three-dimensional illustration; all controls and measures remain HTML. */
.prk-calculator .calc-viz{margin:0 0 21px;border:1px solid #d6e3eb;border-radius:12px;background:#fff;overflow:hidden;box-shadow:0 7px 22px rgba(26,58,83,.035)}
.prk-calculator .calc-viz .calc-viz-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 15px 0}
.prk-calculator .calc-viz .calc-viz-heading h3{font-size:16px;line-height:1.5;color:#173b54;margin:0;letter-spacing:0}
.prk-calculator .calc-viz .calc-viz-badge{flex-shrink:0;font-size:10px;font-weight:650;line-height:1.5;padding:4px 8px;border:1px solid #c7e2e6;border-radius:20px;background:#edf9fa;color:#267280}
.prk-calculator .calc-viz .calc-viz-status{margin:7px 15px 11px;font-size:11px;line-height:1.7;color:#667c8d}
.prk-calculator .calc-viz .calc-viz-stage{position:relative;isolation:isolate;background:radial-gradient(ellipse at 50% 40%,#f8fcff 0,#edf4f8 72%);border-block:1px solid #e4edf2;overflow:hidden}
.prk-calculator .calc-viz canvas{display:block;width:100%;height:320px;touch-action:pan-y;cursor:grab;outline-offset:-3px}
.prk-calculator .calc-viz canvas:active{cursor:grabbing}
.prk-calculator .calc-viz .calc-viz-gesture{position:absolute;bottom:8px;left:8px;right:8px;pointer-events:none;text-align:center;color:#78909f;font-size:10px;line-height:1.5;letter-spacing:.02em}
.prk-calculator .calc-viz .calc-viz-mode{display:flex;align-items:center;gap:10px;padding:10px 13px 0;color:#62788a;font-size:11px;line-height:1.5}
.prk-calculator .calc-viz .calc-viz-mode select{flex:1;min-width:0;min-height:44px;padding:8px 10px;border:1px solid #cbdce6;border-radius:6px;background:#f8fbfd;color:#294c64;font:12px/1.5 "Microsoft YaHei",sans-serif}
.prk-calculator .calc-viz .calc-viz-controls{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;padding:10px 13px}
.prk-calculator .calc-viz .calc-viz-view,.prk-calculator .calc-viz .calc-viz-actions{display:flex;flex-wrap:wrap;gap:5px;min-width:0}
.prk-calculator .calc-viz button{min-height:44px;padding:8px 10px;border:1px solid #d0dee7;border-radius:6px;background:#fff;color:#49667b;font-size:11px;line-height:1.5;font-weight:600;white-space:nowrap;transition:background .15s,border-color .15s}
.prk-calculator .calc-viz button:hover:not(:disabled){background:#edf5f8;border-color:#91bcca}
.prk-calculator .calc-viz button[aria-pressed="true"]{background:#e7f4f7;border-color:#79b6c4;color:#176278}
.prk-calculator .calc-viz .calc-viz-play{background:#1d718c;border-color:#1d718c;color:#fff}
.prk-calculator .calc-viz .calc-viz-play:hover:not(:disabled),.prk-calculator .calc-viz .calc-viz-play[aria-pressed="true"]{background:#155d75;border-color:#155d75;color:#fff}
.prk-calculator .calc-viz .calc-viz-progress{display:block;padding:0 15px 7px;font-size:10px;line-height:1.5;color:#607e91}
.prk-calculator .calc-viz .calc-viz-progress span{display:block;text-align:center;letter-spacing:.04em}
.prk-calculator .calc-viz .calc-viz-progress input{display:block;width:100%;height:32px;margin:0;accent-color:#20879c;cursor:pointer;touch-action:pan-y}
.prk-calculator .calc-viz .calc-viz-progress input:disabled{cursor:not-allowed}
.prk-calculator .calc-viz .calc-viz-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin:0 13px;padding:12px 0;border-top:1px solid #e0e9ef}
.prk-calculator .calc-viz .calc-viz-metrics>div{min-width:0;padding:0 9px;border-left:1px solid #e3ecf1}
.prk-calculator .calc-viz .calc-viz-metrics>div:first-child{padding-left:1px;border-left:0}
.prk-calculator .calc-viz .calc-viz-metrics>div:last-child{padding-right:0}
.prk-calculator .calc-viz .calc-viz-metrics dt{font-size:10px;line-height:1.5;color:#718898;margin-bottom:4px}
.prk-calculator .calc-viz .calc-viz-metrics dd{margin:0;color:#245970;font-size:16px;line-height:1.5;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}
.prk-calculator .calc-viz .calc-viz-metrics strong{font-weight:650}
.prk-calculator .calc-viz .calc-viz-note{display:block;margin:0;padding:9px 14px 11px;border-top:1px solid #e8eef2;background:#f8fafc;color:#7b8c99;font-size:10px;line-height:1.7}
@media(max-width:560px){.prk-calculator .calc-viz .calc-viz-heading{padding:12px 11px 0;gap:6px}.prk-calculator .calc-viz .calc-viz-heading h3{font-size:14px}.prk-calculator .calc-viz .calc-viz-badge{font-size:9px;padding:3px 6px}.prk-calculator .calc-viz .calc-viz-status{margin:6px 11px 9px;font-size:10px}.prk-calculator .calc-viz canvas{height:260px}.prk-calculator .calc-viz .calc-viz-mode{padding:9px 10px 0;gap:8px}.prk-calculator .calc-viz .calc-viz-controls{padding:8px 10px;gap:7px}.prk-calculator .calc-viz .calc-viz-view,.prk-calculator .calc-viz .calc-viz-actions{flex:1 1 100%;gap:6px}.prk-calculator .calc-viz button{flex:1;min-width:0;padding:9px 7px}.prk-calculator .calc-viz .calc-viz-metrics{margin-inline:10px;padding:10px 0}.prk-calculator .calc-viz .calc-viz-metrics>div{padding-inline:7px}.prk-calculator .calc-viz .calc-viz-metrics dt{font-size:9px}.prk-calculator .calc-viz .calc-viz-metrics dd{font-size:14px}.prk-calculator .calc-viz .calc-viz-note{padding:9px 11px;font-size:9px}.prk-calculator .calc-viz .calc-viz-progress{padding-inline:12px}}
@media(prefers-reduced-motion:reduce){.prk-calculator .calc-viz button{transition:none}}