:root{--bg:#f2f8f7;--surface:#fff;--ink:#163c40;--muted:#506b6d;--accent:#0b6c68;--button:#fff;--hero:#103f43;--line:#c8dcd9;--pale:#e6f1ee}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 "Noto Sans CJK SC","Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}img{max-width:100%;height:auto}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.2;letter-spacing:-.025em}p{color:var(--muted)}.shell{width:min(1200px,calc(100% - 64px));margin-inline:auto}.skip{position:absolute;left:-999px;z-index:99;background:#fff;padding:8px}.skip:focus{left:10px}.header{height:80px;background:var(--surface);border-bottom:1px solid var(--line);position:relative;z-index:20}.header-inner{height:100%;display:flex;align-items:center;gap:34px}.brand{display:flex;align-items:center;flex:0 0 auto}.brand img{width:156px;height:62px;object-fit:contain}.header nav{display:flex;gap:28px;align-items:center;margin-left:auto}.header nav a{font-size:14px;color:#35595b;white-space:nowrap}.header nav a:hover,.header nav a[aria-current]{color:var(--accent);font-weight:700}.nav-cta{background:var(--accent);color:#fff;padding:10px 18px;font-size:14px;white-space:nowrap}.menu-button{display:none}.hero{background:var(--hero);color:#fff;overflow:hidden}.hero-inner{min-height:610px;display:grid;grid-template-columns:1fr .92fr;align-items:center;gap:30px}.hero h1{font-size:clamp(42px,4.4vw,68px);margin:22px 0 24px;font-weight:700}.hero p{color:#d6e9e5;font-size:18px;max-width:530px}.eyebrow{display:block;font:700 12px/1.5 Arial,sans-serif;letter-spacing:.18em;color:var(--accent);text-transform:uppercase}.hero .eyebrow,.feature-band .eyebrow{color:#a3d5d0}.hero-art{align-self:stretch;display:flex;align-items:center;justify-content:center;position:relative}.hero-art:before{content:"";position:absolute;inset:9% 0;background:repeating-linear-gradient(90deg,transparent 0,transparent 47px,#ffffff18 48px),repeating-linear-gradient(0deg,transparent 0,transparent 47px,#ffffff18 48px);border:1px solid #ffffff24;transform:skewY(-5deg)}.hero-art img{position:relative;width:min(100%,520px);max-height:480px;object-fit:contain;filter:drop-shadow(0 25px 30px #001e2080)}.actions{display:flex;flex-wrap:wrap;gap:24px;align-items:center;margin-top:32px}.button{display:inline-flex;align-items:center;justify-content:center;background:var(--accent);color:#fff;padding:13px 25px;font-weight:700;min-height:48px}.button.light{background:#e0f6f0;color:#0c4747}.button.outline{background:transparent;color:var(--accent);border:1px solid var(--accent)}.text-link{color:#d9eeea;font-weight:700}.section{padding-block:80px}.section-title{margin-bottom:32px;max-width:760px}.section-title h2,.section h2{font-size:clamp(29px,3vw,42px);margin:10px 0 14px}.section-title p{margin:0}.tinted{background:#e7f1ef}.zone-index{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.zone-index a{position:relative;display:flex;min-height:165px;flex-direction:column;justify-content:space-between;padding:20px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff;transition:background .18s,transform .18s}.zone-index a:hover{background:#dfeeea;transform:translateY(-3px)}.zone-index span{font:700 29px/1 Arial,sans-serif;color:var(--accent)}.zone-index b{font-size:19px}.zone-index small{color:var(--muted)}.zone-index i{position:absolute;right:20px;top:19px;font-style:normal}.category-lines{border-top:1px solid #aac9c4}.category-lines a{display:grid;grid-template-columns:70px 190px 1fr 25px;align-items:center;gap:20px;padding:22px 0;border-bottom:1px solid #aac9c4}.category-lines b{color:var(--accent);font:700 22px Arial,sans-serif}.category-lines strong{font-size:22px}.category-lines span{color:var(--muted)}.category-lines i{font-style:normal}.table-scroll{overflow-x:auto}table{width:100%;border-collapse:collapse;background:#fff;min-width:800px}th,td{text-align:left;border-bottom:1px solid var(--line);padding:17px 13px;vertical-align:middle}thead{background:#174b4e;color:#fff}thead th{font-size:13px}tbody th{font-weight:700}tbody tr:hover{background:#f0f8f5}td{font-size:14px}td del{color:#506b6d;font-size:12px;margin-left:3px}.section-link{display:inline-block;margin-top:26px;color:var(--accent);font-weight:700;border-bottom:1px solid var(--accent);padding-bottom:3px}.feature-band{background:#103f43;color:#fff;overflow:hidden}.feature-grid{display:grid;grid-template-columns:1fr .65fr;gap:8%;align-items:center}.feature-grid h2{font-size:clamp(35px,4vw,56px);margin:15px 0}.feature-grid p{color:#d4e7e4}.feature-grid img{max-height:440px;width:100%;object-fit:contain;filter:drop-shadow(0 20px 25px #002427)}.guide-strip{display:grid;grid-template-columns:repeat(4,1fr);border-top:2px solid var(--accent);border-bottom:1px solid var(--line)}.guide-strip span{padding:22px 14px;border-right:1px solid var(--line);font-weight:700}.reading-list{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}.reading-list a{background:#fff;padding:25px;display:flex;flex-direction:column;gap:11px}.reading-list a:hover{background:#f3faf7}.reading-list small{color:var(--accent);font-weight:700}.reading-list strong{font-size:21px}.reading-list span{color:var(--muted);font-size:14px}.faq-list{border-top:1px solid var(--line)}.faq-list details{border-bottom:1px solid var(--line);padding:19px 0}.faq-list summary{font-size:18px;font-weight:700;cursor:pointer;list-style:none;display:flex;gap:22px;align-items:center}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:'+';margin-left:auto;font-size:23px;color:var(--accent)}.faq-list details[open] summary:after{content:'−'}.faq-list summary span{font:700 13px Arial,sans-serif;color:var(--accent)}.faq-list p{margin:14px 0 0 40px;max-width:900px}.final-cta{background:#0c6663;color:#fff;padding:64px 0}.final-cta h2{font-size:clamp(30px,3vw,44px)}.final-cta p{color:#dbf0ea}.page-head{background:#103f43;color:#fff;padding:62px 0 70px}.page-head h1{font-size:clamp(36px,4vw,56px);margin:15px 0}.page-head p{color:#d6e9e5;max-width:760px;font-size:18px;margin:0}.page-head .eyebrow{color:#9bd3cf}.breadcrumbs{padding-top:16px;padding-bottom:16px;display:flex;gap:12px;font-size:13px;color:#506b6d}.breadcrumbs a:hover{text-decoration:underline}.selection-block{border-top:1px solid var(--line);padding:34px 0 44px;scroll-margin-top:20px}.selection-block h2{margin:9px 0}.selection-block p{max-width:850px}.selection-block>a,.selection-links a{color:var(--accent);font-weight:700;display:inline-block;margin:10px 20px 0 0;border-bottom:1px solid}.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:10px}.filter-bar button{border:1px solid var(--line);background:#fff;color:var(--ink);padding:8px 15px}.filter-bar button.active,.filter-bar button:hover{background:var(--accent);border-color:var(--accent);color:#fff}.filter-count{font-size:14px}.products{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.product{background:#fff;border:1px solid var(--line);padding:25px;scroll-margin-top:20px}.product[hidden],.help-item[hidden]{display:none}.product-head{display:grid;grid-template-columns:65px 1fr auto;align-items:start;gap:16px}.zone-no{font:700 12px Arial,sans-serif;color:var(--accent);padding-top:7px}.product h3{font-size:23px;margin:0 0 5px}.product-head p{font-size:13px;margin:0}.product-use{background:var(--pale);color:var(--accent);font-size:12px;padding:4px 8px}.product-spec{margin:14px 0 20px;font-size:14px}.periods{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.period{padding:13px 8px;border-right:1px solid var(--line);display:flex;flex-wrap:wrap;align-items:baseline;gap:5px}.period:last-child{border-right:0}.period span{display:block;flex:0 0 100%;font-size:12px;color:var(--muted)}.period strong{font-size:23px;line-height:1.2;color:var(--accent)}.period del{color:#506b6d;font-size:12px}.period em{font-style:normal;font-size:13px;color:#506b6d}.product-end{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:17px;font-size:13px}.product-end span{color:var(--muted)}.product-end a{color:var(--accent);font-weight:700}.search-label{font-weight:700}.search-row{display:flex;max-width:620px;margin:10px 0}.search-row input{flex:1;min-width:0;border:1px solid var(--line);padding:12px 15px;background:#fff;color:var(--ink)}.search-row button{border:1px solid var(--accent);background:var(--accent);color:#fff;padding:0 17px}.help-list{border-top:1px solid var(--line);margin-top:20px}.help-item{display:grid;grid-template-columns:60px 1fr 20px;gap:16px;border-bottom:1px solid var(--line);align-items:center;padding:22px 0}.help-item>span{color:var(--accent);font:700 22px Arial,sans-serif}.help-item h2{font-size:21px;margin:0 0 4px}.help-item p{font-size:14px;margin:0}.help-item b{color:var(--accent)}.article-layout{width:min(1200px,calc(100% - 64px));margin:0 auto;padding:70px 0;display:grid;grid-template-columns:minmax(0,840px) 210px;gap:70px;align-items:start}.tutorial-body{font-size:17px;line-height:1.8;min-width:0}.tutorial-body h2{font-size:31px;margin:40px 0 15px}.tutorial-body h2:first-child{margin-top:0}.tutorial-body h3{font-size:23px;margin:38px 0 14px}.tutorial-body p,.tutorial-body li{color:#33585a}.tutorial-body a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}.tutorial-body figure{margin:25px 0 38px}.tutorial-body figure a{display:block}.tutorial-body figure img{display:block;width:100%;height:auto;border:1px solid var(--line)}.tutorial-body figcaption{font-size:13px;color:var(--muted);margin-top:8px}.tutorial-body code{background:#e3efec;padding:2px 5px;overflow-wrap:anywhere}.tutorial-body ol,.tutorial-body ul{padding-left:1.4em}.article-callout{background:#e4f0ed;padding:25px 30px}.article-callout h2{font-size:24px}.article-toc{display:flex;gap:7px 15px;flex-wrap:wrap}.tutorial-aside{position:sticky;top:25px;display:flex;flex-direction:column;border-top:2px solid var(--accent);padding-top:15px}.tutorial-aside a{padding:8px 0;border-bottom:1px solid var(--line);font-size:14px}.sitemap-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:40px}.sitemap-grid>div{border-top:2px solid var(--accent);padding-top:16px;display:flex;flex-direction:column;align-items:start}.sitemap-grid h2{font-size:24px}.sitemap-grid a{padding:4px 0;color:var(--accent)}footer{background:#123b3e;color:#e0eeeb;padding:62px 0 25px}footer p{color:#b8d3cf}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1.1fr 1fr;gap:35px}.footer-grid>div{display:flex;flex-direction:column;align-items:start}.footer-grid img{object-fit:contain;background:#fff;padding:5px;max-height:65px}.footer-grid h2{font-size:16px;margin:0 0 15px;color:#fff}.footer-grid a,.footer-grid button{font-size:14px;margin-bottom:8px;color:#cde3df}.footer-grid button{border:0;background:none;padding:0;text-align:left}.footer-grid a:hover,.footer-grid button:hover{text-decoration:underline}.legal{border-top:1px solid #45686a;margin-top:40px;padding-top:22px;display:flex;flex-wrap:wrap;gap:15px 25px;font-size:12px;color:#b8d3cf}.legal a{display:inline-flex;align-items:center;gap:5px}.legal img{background:none;padding:0}dialog{border:0;padding:30px;width:min(430px,calc(100% - 30px));color:var(--ink);box-shadow:0 20px 75px #071e2680}dialog::backdrop{background:#05282caa}.dialog-close{position:absolute;right:10px;top:5px;background:none;border:0;font-size:30px;color:var(--ink)}#contact-content h2{font-size:25px}.contact-account{font-size:28px;color:var(--accent);font-weight:700}.qr{width:220px;display:block;margin:15px auto}.copy-btn{background:var(--accent);color:#fff;border:0;padding:8px 15px}.copy-feedback{font-size:13px;margin-top:8px}#image-dialog{width:min(96vw,1200px);max-height:94vh;overflow:auto;text-align:center}#image-dialog img{max-height:80vh;object-fit:contain}#image-dialog a{color:var(--accent)}:focus-visible{outline:3px solid #e4a24b;outline-offset:3px}[hidden]{display:none!important}@media(max-width:1024px){.header{height:64px}.header-inner{gap:16px}.brand img{width:135px;height:50px}.menu-button{display:block;margin-left:auto;background:none;border:1px solid var(--line);color:var(--ink);padding:5px 10px}.header nav{display:none;position:absolute;left:0;right:0;top:64px;background:#fff;padding:20px 32px;flex-direction:column;align-items:stretch;gap:0;border-bottom:1px solid var(--line)}.header nav.open{display:flex}.header nav a{padding:9px 0}.nav-cta{display:none}.hero-inner{min-height:530px}.article-layout{grid-template-columns:minmax(0,1fr)}.tutorial-aside{display:none}.footer-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:768px){.shell,.article-layout{width:min(100% - 36px,1200px)}.section{padding-block:44px}.hero-inner{display:block;min-height:0;padding-block:56px 30px}.hero h1{font-size:34px;line-height:1.23;margin:15px 0}.hero p{font-size:16px}.hero-art{height:230px;margin-top:25px}.hero-art img{max-height:240px}.zone-index{grid-template-columns:repeat(2,1fr)}.zone-index a{min-height:135px;padding:14px}.zone-index b{font-size:16px}.zone-index span{font-size:22px}.zone-index small{font-size:11px}.category-lines a{grid-template-columns:35px 1fr 20px;gap:9px}.category-lines strong{font-size:18px}.category-lines span{grid-column:2;grid-row:2;font-size:13px}.category-lines i{grid-column:3;grid-row:1}.guide-strip{grid-template-columns:repeat(2,1fr)}.reading-list,.feature-grid,.products,.sitemap-grid{grid-template-columns:1fr}.feature-grid img{max-height:250px;margin-top:25px}.page-head{padding:42px 0}.page-head h1{font-size:33px}.page-head p{font-size:16px}table{min-width:0;background:transparent}table thead{display:none}table tbody{display:grid;gap:12px}table tr{display:grid;background:#fff;border:1px solid var(--line);padding:12px}table th,table td{padding:5px;border:0;display:flex;justify-content:space-between;gap:15px}table th{font-size:16px;border-bottom:1px solid var(--line);padding-bottom:8px;margin-bottom:4px}table td:before{content:attr(data-label);color:var(--muted);font-size:12px}table td{font-size:13px}.product{padding:17px}.product-head{grid-template-columns:50px 1fr;gap:6px}.product-use{grid-column:2;justify-self:start}.product h3{font-size:21px}.period{padding:10px 5px}.period strong{font-size:19px}.product-end{align-items:start}.article-layout{padding:42px 0}.tutorial-body{font-size:16px}.tutorial-body h2{font-size:25px}.tutorial-body h3{font-size:21px}.article-callout{padding:18px}.footer-grid{grid-template-columns:1fr 1fr;gap:28px 15px}.footer-grid>div:first-child{grid-column:1/-1}.footer-grid h2{font-size:14px}.legal{display:grid}.faq-list summary{font-size:16px}.faq-list p{margin-left:0}.help-item{grid-template-columns:40px 1fr 15px;gap:9px}.help-item h2{font-size:17px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}


/* 2026-10-30 redesign: shared header/footer and the home page */
:root{--bg:#fff;--surface:#fff;--ink:#173f42;--muted:#4c6667;--accent:#126c6a;--hero:#16464a;--line:#d5e3e0;--pale:#eaf3f1}
body{background:#fff}
.header{background:#fff;border-color:#e4ecea}
.header nav a{font-size:15px}
.nav-cta{border-radius:7px;min-height:44px;display:inline-flex;align-items:center}
.mobile-register{display:none}
footer{background:#eaf3f1;color:var(--ink);padding:48px 0 22px}
footer p,.footer-grid a,.footer-grid button,.legal{color:#426164}
.footer-grid h2{color:var(--ink)}
.footer-grid img{background:transparent;padding:0}
.legal{border-color:#b9d0cc}
.legal img{background:transparent}
.home-hero{background:#16464a;color:#fff;text-align:center}
.home-hero-inner{padding:88px 0 82px;max-width:900px}
.home-hero h1{font-size:clamp(42px,4vw,52px);line-height:1.17;margin:0 0 20px;letter-spacing:-.025em}
.home-hero p{color:#e0eeee;font-size:17px;line-height:1.7;max-width:650px;margin:0 auto}
.home-hero-actions{display:flex;justify-content:center;gap:13px;margin:28px 0 20px}
.home-hero .button{border-radius:7px;min-width:166px;min-height:46px}
.home-hero .button.ghost{background:transparent;border:1px solid #c6e1dd;color:#fff}
.home-hero .home-referrer{font-size:14px;color:#c4dfdc}
.home-referrer strong{color:#fff}
.home-section{padding-top:68px;padding-bottom:68px}
.home-label{display:inline-block;color:#126c6a;font-size:14px;font-weight:700;margin-bottom:8px}
.home-heading{display:flex;justify-content:space-between;align-items:end;gap:35px;margin-bottom:30px}
.home-heading h2,.home-feature h2{font-size:34px;margin:0;line-height:1.25}
.home-heading p{margin:0;max-width:435px;font-size:15px}
.home-heading p a,.home-heading>a,.home-inline-link{color:var(--accent);font-weight:700;text-decoration:underline;text-underline-offset:4px}
.home-filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.home-filters button{min-height:44px;padding:8px 17px;border:1px solid #bdd2ce;border-radius:7px;background:#fff;color:var(--ink)}
.home-filters button[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:#fff}
.home-filter-count{font-size:14px;margin:0 0 18px}
.home-table-wrap{overflow-x:auto}
.home-table{min-width:100%;background:#fff;border-top:2px solid #126c6a}
.home-table caption{text-align:left;font-weight:700;color:var(--ink);padding:0 0 10px}
.home-table thead{background:#edf5f3;color:var(--ink)}
.home-table th,.home-table td{padding:16px 11px;border-color:#dce8e5;font-size:14px}
.home-table thead th{font-size:13px}
.home-table tbody th{min-width:225px}
.home-table tbody th strong{font-size:15px}
.home-zone{display:inline-block;min-width:34px;color:var(--accent);font-weight:700}
.home-tags{display:flex;flex-wrap:wrap;gap:4px;margin:5px 0 0 34px}
.home-tags span{font-size:11px;line-height:1.5;background:#e8f3f1;color:#1d5e5e;padding:2px 6px;border-radius:4px}
.home-row-link a{color:var(--accent);font-weight:700;white-space:nowrap}
.home-table tr[hidden]{display:none}
.home-feature{background:#f2f8f7}
.home-feature-grid{display:grid;grid-template-columns:1fr .9fr;align-items:center;gap:8%}
.home-feature-grid>div>p{max-width:470px;margin:18px 0}
.home-feature-list{padding:0;margin:22px 0;list-style:none;border-top:1px solid #cadcd8}
.home-feature-list li{display:grid;grid-template-columns:100px 1fr;gap:16px;padding:16px 0;border-bottom:1px solid #cadcd8}
.home-feature-list strong{color:var(--ink)}
.home-feature-list span{color:var(--muted);font-size:14px}
.home-feature figure{margin:0}
.home-feature figure img{display:block;width:100%;height:auto;object-fit:contain;background:#fff;border-radius:8px}
.home-feature figcaption{font-size:13px;color:var(--muted);margin-top:8px}
.home-guide .home-heading{margin-bottom:26px}
.home-steps{display:grid;grid-template-columns:repeat(3,1fr);padding:0;margin:0 0 27px;list-style:none;border-top:1px solid #c7dbd6;border-bottom:1px solid #c7dbd6}
.home-steps li{padding:21px 25px 21px 0;margin-right:25px;border-right:1px solid #c7dbd6;display:flex;flex-direction:column;gap:7px}
.home-steps li:last-child{border-right:0;margin-right:0}
.home-steps strong{font-size:17px}
.home-steps span{color:var(--muted);font-size:14px}
.home-guide>.button{border-radius:7px;min-height:44px}
.home-questions{background:#f5f9f8}
.home-questions .faq-list{max-width:900px}
.home-questions .home-heading>a{white-space:nowrap;font-size:14px}
.home-contact{display:flex;justify-content:space-between;align-items:center;gap:30px;margin-top:45px;padding:24px 0;border-top:1px solid #c9dcd7}
.home-contact h3{font-size:21px;margin:0 0 5px}
.home-contact p{font-size:14px;margin:0}
.home-contact>div:last-child{display:flex;flex-wrap:wrap;gap:8px}
.home-contact button,.home-contact a{min-height:44px;padding:8px 15px;background:#fff;border:1px solid #b7d0cb;border-radius:7px;color:var(--accent);font-weight:700;display:inline-flex;align-items:center}
.home-section .reading-list{background:transparent;border:0;gap:25px}
.home-section .reading-list a{border-top:2px solid #b8d4ce;padding:18px 0;background:transparent}
@media(max-width:1024px){.mobile-register{display:block!important;color:var(--accent)!important;font-weight:700}.menu-button{min-height:44px;border-radius:6px}}
@media(max-width:768px){.home-section{padding-top:38px;padding-bottom:38px}.home-hero-inner{padding:51px 0 48px}.home-hero h1{font-size:32px;max-width:345px;margin:0 auto 16px}.home-hero p{font-size:15px}.home-hero-actions{margin:24px 0 17px;gap:9px}.home-hero .button{min-width:0;flex:1;padding:10px 8px;font-size:14px}.home-hero .home-referrer{font-size:13px}.home-heading{display:block;margin-bottom:20px}.home-heading h2,.home-feature h2{font-size:27px}.home-heading p{margin-top:10px;font-size:14px}.home-filters{display:grid;grid-template-columns:repeat(2,1fr)}.home-filters button{padding:7px}.home-table{min-width:0;border:0}.home-table caption{font-size:13px}.home-table tbody{gap:10px}.home-table tr{border-radius:8px;padding:15px 16px}.home-table tbody th{min-width:0}.home-table tbody th,.home-table td{padding:4px 0;font-size:13px}.home-table tbody th{display:block;border-bottom:1px solid #dce8e5;margin-bottom:6px;padding-bottom:10px}.home-zone{min-width:38px}.home-tags{display:inline-flex;margin:0 0 0 8px;vertical-align:middle}.home-table td[data-label]::before{font-size:12px;min-width:65px}.home-table td:last-child{margin-top:8px;justify-content:flex-end}.home-feature-grid,.home-steps{display:block}.home-feature-list li{grid-template-columns:70px 1fr;gap:10px}.home-feature figure{margin-top:25px}.home-steps li{margin:0;padding:16px 0;border-right:0;border-bottom:1px solid #c7dbd6}.home-steps li:last-child{border-bottom:0}.home-contact{display:block;margin-top:30px}.home-contact>div:last-child{margin-top:17px}.home-contact button,.home-contact a{font-size:13px}.home-section .reading-list{gap:0}.home-section .reading-list a{padding:16px 0}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:1024px){.nav-cta{display:none!important}}
/* 2026-10-30 redesign: inner pages and content rhythm */
@media(min-width:769px){.home-hero h1 span{display:inline}.home-hero h1 span+span:before{content:""}}
.home-hero p{max-width:760px;text-wrap:balance}
.page-head{background:#eff6f4;color:var(--ink);padding:52px 0 55px}
.page-head .eyebrow{color:var(--accent);font:700 14px/1.5 "Noto Sans CJK SC","Microsoft YaHei",sans-serif;letter-spacing:0;text-transform:none}
.page-head h1{font-size:clamp(44px,3.4vw,50px);margin:8px 0 12px}
.page-head p{color:var(--muted);font-size:16px;max-width:760px}
.section{padding-top:64px;padding-bottom:64px}
.section h2{font-size:32px}
.selection-top{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:8%;align-items:start}
.selection-top h2{margin-top:0}
.selection-top p{max-width:650px}
.selection-top ol{padding-left:1.3em;color:var(--ink);line-height:2}
.selection-top figure{margin:0;background:#f1f7f5;padding:18px;border-radius:8px}
.selection-top figure img{width:100%;max-height:470px;object-fit:contain;display:block}
.selection-top figcaption{font-size:13px;color:var(--muted);margin-top:8px}
.selection-routes{background:#f6faf9}
.selection-routes h2{margin-top:0;margin-bottom:24px}
.selection-route{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:50px;padding:26px 0;border-top:1px solid #c8dbd7;scroll-margin-top:16px}
.selection-route:last-child{border-bottom:1px solid #c8dbd7}
.selection-route span{color:var(--accent);font-weight:700;font-size:13px}
.selection-route h3{font-size:23px;margin:6px 0 8px}
.selection-route p{margin:0;max-width:690px}
.selection-route .selection-links{display:flex;flex-direction:column;gap:3px}
.selection-route .selection-links a{display:block;margin:0;padding:5px 0;border:0;color:var(--accent);font-size:14px}
.selection-conditions>div{display:grid;grid-template-columns:repeat(3,1fr);gap:25px;border-top:1px solid var(--line);margin:22px 0}
.selection-conditions p{padding:18px 0;border-bottom:1px solid var(--line);margin:0;font-size:15px}
.selection-conditions .button{border-radius:7px}
.products{display:block;border-top:1px solid #bcd4cf}
.product{display:grid;grid-template-columns:260px minmax(0,1fr);gap:4px 35px;background:#fff;border:0;border-bottom:1px solid #cbded9;padding:26px 0;scroll-margin-top:15px}
.product-head{grid-column:1;grid-row:1/3;display:block}
.product-head .zone-no{display:inline-block;border-radius:5px;background:#e5f1ee;padding:4px 8px;margin-bottom:10px;font-size:13px}
.product-head h2{font-size:23px;margin:0 0 6px}
.product-head p{margin:0;font-size:13px}
.product-use{display:inline-block;margin-top:11px;border-radius:4px}
.product-details{grid-column:2;display:grid;grid-template-columns:135px minmax(0,1fr);gap:18px;align-items:start}
.product-spec{margin:0;color:var(--ink);font-weight:700;font-size:15px}
.product-note{display:block;font-weight:400;color:var(--muted);font-size:13px;line-height:1.5;margin-top:6px}
.periods{background:#f8fbfa;border:1px solid #d8e6e2;border-radius:7px}
.period{padding:10px 14px}
.period strong{font-variant-numeric:tabular-nums}
.product-end{grid-column:2;display:flex;justify-content:space-between;align-items:center;margin:8px 0 0;font-size:13px}
.product-end a{min-height:44px;display:inline-flex;align-items:center}
.pricing-note{margin:28px 0 0;font-size:14px}
.filter-bar{margin-bottom:12px}
.filter-bar button{border-radius:7px;min-height:44px}
.help-list{margin-top:28px}
.help-item small{color:var(--accent);font-weight:700;font-size:12px}
.help-item h2{margin:4px 0;font-size:20px}
.help-item:hover{background:#f5faf8}
.search-row input,.search-row button{min-height:44px}
.search-row input{border-radius:7px 0 0 7px}
.search-row button{border-radius:0 7px 7px 0}
.article-layout{padding-top:58px;padding-bottom:68px}
.tutorial-body{line-height:1.8}
.tutorial-body h2{font-size:29px;margin:44px 0 16px;scroll-margin-top:20px}
.tutorial-body h3{font-size:21px;margin:28px 0 12px;scroll-margin-top:20px}
.tutorial-body h2:first-child{margin-top:0}
.article-callout{border-radius:8px;background:#eef6f4;padding:22px 28px}
.article-callout h2{font-size:24px;margin:0 0 10px}
.article-callout h3{font-size:19px;margin:20px 0 8px}
.mobile-toc{display:none}
.tutorial-aside{border-top:2px solid var(--accent)}
.tutorial-aside strong{margin-bottom:8px}
.tutorial-aside a{min-height:40px}
.tutorial-related{border-top:1px solid var(--line);margin-top:44px;padding-top:12px}
.tutorial-related a{display:inline-block;margin:0 20px 8px 0}
.sitemap-grid>div{border-color:var(--accent)}
.sitemap-grid a{min-height:36px}
@media(max-width:1024px){.selection-top{grid-template-columns:minmax(0,1fr) 280px;gap:35px}.product{grid-template-columns:210px minmax(0,1fr);gap:18px}.product-details{grid-template-columns:1fr}.article-layout{grid-template-columns:1fr}.tutorial-aside{display:none}}
@media(max-width:768px){.home-hero h1 span{display:block;white-space:nowrap}.home-hero h1{font-size:30px;max-width:none;letter-spacing:-.05em}.home-hero p{max-width:350px}.page-head{padding:36px 0 38px}.page-head h1{font-size:32px}.page-head p{font-size:15px}.section{padding-top:38px;padding-bottom:38px}.section h2{font-size:26px}.selection-top{display:block}.selection-top figure{margin-top:28px}.selection-route{display:block;padding:23px 0}.selection-route h3{font-size:21px}.selection-route .selection-links{margin-top:10px}.selection-conditions>div{display:block;margin:15px 0 25px}.selection-conditions p{padding:12px 0}.product{display:block;padding:20px 0}.product-head{display:grid;grid-template-columns:45px 1fr;gap:0 8px}.product-head .zone-no{grid-column:1;grid-row:1;margin:0;padding:4px 3px;text-align:center}.product-head>div{grid-column:2;grid-row:1}.product-head h2{font-size:20px}.product-use{grid-column:2;margin:7px 0 0;justify-self:start}.product-details{display:block;margin:12px 0 0}.product-spec{font-size:14px;margin:0 0 12px}.period{padding:9px 5px}.period strong{font-size:19px}.product-end{margin-top:10px;align-items:center}.product-end span{font-size:11px;max-width:160px}.filter-bar{display:grid;grid-template-columns:repeat(2,1fr)}.filter-bar button{padding:7px}.help-item h2{font-size:17px}.article-layout{padding-top:28px;padding-bottom:45px}.mobile-toc{display:block;border:1px solid #bfd6d0;border-radius:7px;margin:0 0 28px}.mobile-toc summary{padding:10px 15px;font-weight:700;cursor:pointer;min-height:44px}.article-toc{padding:4px 15px 15px;display:flex;flex-direction:column;gap:2px}.article-toc strong{display:none}.article-toc a{padding:6px 0}.tutorial-body h2{font-size:25px}.tutorial-body h3{font-size:19px}.article-callout{padding:18px}.tutorial-related a{display:block}.sitemap-grid{gap:22px}}
@media(max-width:390px){.home-hero h1{font-size:29px}}
.home-mobile-meta,.home-mobile-summary{display:none}
@media(max-width:768px){.home-table tbody th{border:0;margin:0;padding:0}.home-table tbody th strong{font-size:17px}.home-table tbody td:not(.home-row-link){display:none}.home-mobile-meta,.home-mobile-summary{display:block;margin:8px 0 0 38px;font-size:13px;font-weight:400;color:var(--muted)}.home-mobile-summary{font-size:14px;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums}.home-table td.home-row-link{display:block;text-align:right;padding:7px 0 0}.home-table tr{min-height:154px}.home-tags{margin-left:8px}}

/* Final approved tutorial typography: 17px / 1.8 */
.tutorial-body p,.tutorial-body li{font-size:17px;line-height:1.8}

/* Supplied brand artwork: complete 4:3 composition, responsive and keyboard zoomable. */
.brand-home-figure{min-width:0;margin:0;display:block;background:transparent;box-shadow:none;overflow:visible}
.brand-home-link{display:block;width:100%;border-radius:8px;overflow:hidden;line-height:0;cursor:zoom-in;text-decoration:none}
.brand-home-link:focus-visible{outline:3px solid currentColor;outline-offset:5px}
.brand-home-link img{display:block;width:100%;max-width:100%;height:auto;aspect-ratio:4/3;object-fit:contain;filter:none;box-shadow:none}
.brand-home-caption{display:flex;justify-content:flex-end;gap:8px;align-items:center;margin:8px 0 0;font-size:12px;line-height:1.6;letter-spacing:0}

.home-art-section{padding-top:38px;padding-bottom:0}
.home-art-section .brand-home-figure{max-width:1120px;margin-inline:auto}
.home-art-section .brand-home-caption{color:#4d6466}
.home-art-section+.home-section{padding-top:42px}
.home-feature-grid{display:block}
.home-feature-grid>div>p{max-width:760px}
.home-feature-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;margin-bottom:18px}
.home-feature-list li{display:block;padding:20px 0}
.home-feature-list li strong{display:block;margin-bottom:7px}
@media(max-width:768px){.home-art-section{padding-top:24px}.home-art-section+.home-section{padding-top:32px}.home-feature-list{display:block}.home-feature-list li{display:grid;grid-template-columns:76px minmax(0,1fr);gap:12px;padding:15px 0}.home-feature-list li strong{margin-bottom:0}}

/* 2026-11-01 cleanup: focused home, shared footer and support controls */
.home-hero{background:#16464a;text-align:left}
.home-hero-inner{max-width:1200px;display:grid;grid-template-columns:minmax(0,1fr) 520px;gap:50px;align-items:center;padding:54px 0;min-height:0}
.home-hero-copy{min-width:0}
.home-hero h1{font-size:44px;line-height:1.18;max-width:610px;margin:0 0 20px;letter-spacing:-.035em}
.home-hero-copy>p{font-size:16px;line-height:1.7;max-width:610px;margin:0}
.home-hero-actions{justify-content:flex-start;margin:26px 0 15px}
.home-hero .home-referrer{font-size:13px;color:#d4e9e6;margin:0}
.home-referrer a{color:#fff;text-decoration:underline;text-underline-offset:3px}
.home-hero-media{margin:0;min-width:0}
.home-hero-media .figure-link{display:block;background:#fff;border-radius:8px;overflow:hidden;line-height:0;cursor:zoom-in}
.home-hero-media picture,.home-hero-media img{display:block;width:100%}
.home-hero-media img{height:auto;aspect-ratio:4/3;object-fit:contain}
.home-hero-media figcaption{font-size:12px;line-height:1.5;color:#d4e9e6;margin-top:8px;text-align:right}
.home-section{padding-top:54px;padding-bottom:54px}
.home-summary .home-heading{margin-bottom:15px}
.home-route-list{border-top:1px solid var(--line)}
.home-route-list a{display:grid;grid-template-columns:170px 1fr 24px;align-items:center;gap:25px;min-height:94px;border-bottom:1px solid var(--line);padding:12px 4px}
.home-route-list strong{font-size:20px;color:var(--ink)}
.home-route-list span{color:var(--muted)}
.home-route-list b{color:var(--accent);font-size:20px;font-weight:400}
.home-route-list a:hover strong,.home-route-list a:hover b{color:#084f4e}
.home-month-note{margin:19px 0 0;font-size:14px}
.home-month-note a{color:var(--accent);font-weight:700;text-decoration:underline;text-underline-offset:3px}
.home-guide{background:#f3f8f7}
.home-guide .home-heading{margin-bottom:23px}
.home-questions .faq-list{max-width:100%}
.footer-grid{grid-template-columns:1.35fr .75fr 1.1fr .8fr;gap:34px}
.footer-brand p{font-size:14px;max-width:340px;margin-top:15px}
.footer-grid a,.footer-grid button{line-height:1.6}
.legal{margin-top:32px}
.support-rail{position:fixed;right:20px;bottom:30px;z-index:50;display:flex;flex-direction:column;gap:12px}
.support-rail[hidden]{display:none!important}
.support-rail button{width:48px;height:48px;border:0;border-radius:50%;display:grid;place-items:center;box-shadow:0 3px 12px #173f4233}
.support-rail button img{width:25px;height:25px;filter:brightness(0) invert(1)}
.support-qq{background:#2477c7}.support-wechat{background:#1a9a55}
.support-rail button:hover{transform:translateY(-2px)}
.support-rail button:focus-visible{outline:3px solid #e4a24b;outline-offset:3px}
#contact-dialog{border-radius:10px;max-width:440px}
#contact-content h2{font-size:26px;margin:2px 0 14px}
#contact-content p{margin:0 0 14px}
#contact-content .copy-btn{border-radius:6px;min-height:44px}
#contact-content .copy-feedback{margin:8px 0;color:var(--muted)}
#contact-content .support-external{display:inline-block;color:var(--accent);font-weight:700;margin-top:10px}
#contact-content .qr{width:220px;height:auto;max-width:100%;background:#fff;padding:8px}
@media(max-width:1024px){.home-hero-inner{grid-template-columns:minmax(0,1fr) 42%;gap:32px}.home-hero h1{font-size:40px}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:768px){.home-hero-inner{display:flex;flex-direction:column;align-items:stretch;gap:23px;padding:36px 0 31px}.home-hero h1{font-size:31px;max-width:none;letter-spacing:-.04em}.home-hero-copy>p{font-size:15px}.home-hero-actions{display:flex;gap:9px;margin:21px 0 12px}.home-hero .button{flex:1;min-width:0;padding:10px 7px;font-size:14px}.home-hero .home-referrer{font-size:12px}.home-hero-media figcaption{text-align:left}.home-section{padding-top:34px;padding-bottom:34px}.home-route-list a{grid-template-columns:1fr 22px;gap:2px 10px;min-height:0;padding:16px 2px}.home-route-list strong{font-size:18px}.home-route-list span{grid-column:1;grid-row:2;font-size:14px}.home-route-list b{grid-column:2;grid-row:1}.home-month-note{font-size:13px}.home-steps li{padding:14px 0}.footer-grid{grid-template-columns:1fr 1fr;gap:23px 15px}.footer-brand{grid-column:1/-1}.support-rail{right:12px;bottom:max(16px,env(safe-area-inset-bottom));gap:8px}.support-rail button{width:44px;height:44px}.support-rail button img{width:23px;height:23px}}
/* 2026-11-01 cleanup: inner-page hierarchy */
.page-head h1{font-size:36px}
.section{padding-top:54px;padding-bottom:54px}
.section h2{font-size:30px}
#comparison.section{padding-top:36px}
.help-feature{display:block;border:1px solid #c7dcd6;border-radius:8px;background:#eef6f4;padding:26px 30px;color:var(--ink)}
.help-feature span{font-size:13px;font-weight:700;color:var(--accent)}
.help-feature h2{margin:5px 0 9px;font-size:27px}
.help-feature p{margin:0 0 11px;max-width:770px}
.help-feature strong{color:var(--accent);font-size:15px}
.help-search-area{padding:34px 0 17px}
.help-categories{display:flex;flex-wrap:wrap;gap:8px;margin:13px 0 11px}
.help-categories button{min-height:44px;padding:8px 14px;border:1px solid #bfd4cf;border-radius:7px;background:#fff;color:var(--ink)}
.help-categories button[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:#fff}
.help-groups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 45px}
.help-groups>[hidden]{display:none!important}
.help-groups section>h2{font-size:22px;margin:0 0 8px}
.help-groups .help-list{margin:0;border-top:1px solid var(--line)}
.help-groups .help-item{grid-template-columns:minmax(0,1fr) 24px;gap:14px;min-height:116px;padding:17px 0}
.help-groups .help-item h3{font-size:17px;margin:3px 0 5px}
.help-groups .help-item p{margin:0;font-size:13px}
.help-groups .help-item b{align-self:center;font-size:19px}
.faq-groups{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:30px 50px}
.faq-groups>div>h2{margin:0 0 12px}
.faq-groups .faq-list details{padding:15px 0}
.faq-groups .section-link{grid-column:1/-1}
@media(max-width:768px){.page-head h1{font-size:29px}.section{padding-top:34px;padding-bottom:34px}.section h2{font-size:25px}#comparison.section{padding-top:28px}.help-feature{padding:20px}.help-feature h2{font-size:23px}.help-search-area{padding:27px 0 15px}.help-categories{display:grid;grid-template-columns:repeat(2,1fr)}.help-categories button{font-size:14px;padding:7px}.help-groups,.faq-groups{display:block}.help-groups>section,.faq-groups>div{margin-bottom:27px}.help-groups section>h2{font-size:20px}.help-groups .help-item{min-height:0;padding:14px 0}.faq-groups .faq-list summary{font-size:16px}}
@media(max-width:768px){.product-end{padding-right:56px}.help-categories{padding-right:56px}.help-groups .help-item{padding-right:54px}.faq-list summary{padding-right:54px}}
.home-steps strong a,.home-steps span a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.home-steps strong a:hover,.home-steps span a:hover{color:#084f4e}
@media(max-width:768px){.tutorial-h1-line{display:block;white-space:nowrap}}


/* Second-set selection artwork: complete portrait, with an accessible full-size view. */
.selection-artwork{margin:0;width:100%;max-width:440px;min-width:0;justify-self:end}
.selection-artwork>a{display:block;overflow:hidden;border:1px solid #dbe5ea;border-radius:12px;background:#fff;cursor:zoom-in;transition:transform .18s ease}
.selection-artwork>a:hover{transform:translateY(-2px)}
.selection-artwork img{display:block;width:100%;height:auto;max-height:none;object-fit:contain}
.selection-artwork figcaption{font-size:13px;line-height:1.6;color:#4b616b;text-align:center;margin:9px 0 0}
@media(max-width:768px){.selection-artwork{max-width:440px;margin:0 auto;align-self:center;justify-self:center}.selection-artwork figcaption{font-size:12px}}
@media(prefers-reduced-motion:reduce){.selection-artwork>a{transition:none}.selection-artwork>a:hover{transform:none}}

.selection-top{grid-template-columns:minmax(0,1fr) 440px;gap:70px;align-items:center;padding-block:38px 50px}
.selection-top>div{min-width:0;max-width:560px}.selection-top h2{font-size:30px;line-height:1.4}.selection-top>div>p{font-size:16px}
.selection-top figure.selection-artwork{background:none;padding:0;border-radius:0}
.selection-top .selection-artwork img{max-height:none;height:auto}
.selection-shortcuts{display:flex;flex-direction:column;border-top:1px solid var(--line);margin-top:23px}
.selection-shortcuts a{display:block;padding:18px 0;border-bottom:1px solid var(--line)}
.selection-shortcuts strong,.selection-shortcuts span{display:block}.selection-shortcuts strong{font-size:19px;margin-bottom:5px}.selection-shortcuts span{font-size:14px;color:var(--accent)}
.selection-shortcuts a:hover strong{text-decoration:underline;text-underline-offset:4px}
@media(max-width:1024px){.selection-top{grid-template-columns:minmax(0,1fr) 40%;gap:35px}.selection-top h2{font-size:27px}}
@media(max-width:768px){.selection-top{display:flex;flex-direction:column;align-items:stretch;gap:28px;padding-block:27px 38px}.selection-top>.selection-artwork{order:-1}.selection-top>div{max-width:none}.selection-top h2{font-size:26px}.selection-shortcuts{margin-top:18px}.selection-shortcuts a{padding:15px 0}.selection-shortcuts strong{font-size:18px}.selection-top .section-link{margin-top:21px}}