:root{
  --paper:#F5F3EC;
  --panel:#FFFFFF;
  --poster-panel:#FFFDFA;
  --poster-line:#E8E4DB;
  --field:#FFFFFF;
  --ink:#011C44;
  --ink-soft:#6B6B70;
  --line:#E2DFD3;
  --stamp:#FE6201;
  --stamp-mid:#E65A00;
  --stamp-deep:#AE3C00;
  --stamp-soft:#FBE2CB;
  --stamp-contrast:#FFFFFF;
  --green:#1F6F5C;
  --green-soft:#E3F0EC;
  --action-primary-bg:#011C44;
  --action-primary-fg:#FFFFFF;
  --action-primary-hover:#0B3368;
  --action-primary-active:#00163A;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:88px;}
html,body{margin:0;min-height:100%;background:var(--paper);color:var(--ink);}
body{font-family:"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased;}
html:lang(zh-TW) body{font-family:"PingFang TC","Microsoft JhengHei","Noto Sans TC","PingFang SC","Microsoft YaHei",sans-serif;}
body.is-overlay-open{overflow:hidden;}
a,button,input{font:inherit;}
a{color:inherit;text-decoration:none;}
button{border:0;background:none;color:inherit;cursor:pointer;}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--stamp-deep);outline-offset:3px;}

.page-shell{width:100%;margin:0 auto;padding-inline:clamp(24px,3vw,64px);}

.page-progress{position:fixed;z-index:300;top:0;left:0;width:100%;height:2px;pointer-events:none;opacity:0;transition:opacity .18s ease;}
.page-progress.is-visible{opacity:1;}
.page-progress span{display:block;width:0;height:100%;background:linear-gradient(90deg,var(--stamp),var(--stamp-deep));box-shadow:0 1px 5px color-mix(in srgb,var(--stamp) 38%,transparent);transition:width .28s cubic-bezier(.2,.75,.35,1);}

/* Header: follows the homepage shell rather than the information-page header. */
.top{padding:16px 0 0;}
.top-row{display:flex;align-items:center;gap:18px;min-height:44px;}
.brand{display:flex;align-items:center;gap:8px;flex:none;}
.brand .mark{width:34px;height:34px;flex:none;background:url("./yiang-favicon.svg") center/contain no-repeat;}
.brand-copy{display:flex;min-width:0;flex-direction:column;justify-content:center;}
.brand-title{display:grid;grid-template-columns:max-content 1px max-content;grid-template-rows:1fr 1fr;column-gap:8px;row-gap:1px;height:34px;line-height:1;}
.brand-cn{grid-column:1;grid-row:1 / span 2;align-self:center;font-size:22px;font-weight:800;line-height:.96;letter-spacing:.08em;}
.brand-cn .brand-accent{color:var(--stamp-mid);}
.brand-divider{grid-column:2;grid-row:1 / span 2;align-self:center;width:1px;height:22px;background:var(--line);}
.brand-en{grid-column:3;grid-row:1;align-self:end;padding-bottom:1px;color:var(--ink);font-size:12px;font-weight:700;line-height:1;letter-spacing:.055em;white-space:nowrap;}
.brand-tagline{grid-column:3;grid-row:2;align-self:start;padding-top:1px;color:var(--ink-soft);font-size:10px;line-height:1.2;letter-spacing:.015em;white-space:nowrap;}

.search{position:relative;display:flex;flex:1;min-width:0;max-width:440px;height:40px;margin:0 auto;}
.search-icon{position:absolute;z-index:2;top:50%;left:13px;width:16px;height:16px;transform:translateY(-50%);pointer-events:none;color:var(--ink-soft);fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.search input{flex:1;min-width:0;border:1px solid var(--line);border-right:0;border-radius:7px 0 0 7px;background:var(--field);padding:0 14px 0 39px;color:var(--ink);font-size:13.5px;outline:0;transition:border-color .15s ease,box-shadow .15s ease;}
.search input::placeholder{color:color-mix(in srgb,var(--ink-soft) 88%,transparent);}
.search input:focus{position:relative;z-index:1;border-color:color-mix(in srgb,var(--stamp) 70%,var(--line));box-shadow:0 0 0 3px color-mix(in srgb,var(--stamp) 12%,transparent);}
.search-submit{flex:0 0 76px;width:76px;border-radius:0 7px 7px 0;background:var(--action-primary-bg);color:var(--action-primary-fg);font-size:13.5px;font-weight:700;transition:background .15s ease,transform .15s ease;}
.search-submit:hover{background:var(--action-primary-hover);}
.search-submit:active{background:var(--action-primary-active);transform:translateY(1px);}

.toplinks{display:flex;align-items:center;flex:none;color:var(--ink-soft);font-size:12px;}
.lang-switcher{position:relative;}
.lang-toggle{display:flex;align-items:center;gap:5px;min-height:32px;padding:0 8px;color:var(--ink);font-size:12px;font-weight:700;}
.lang-code{color:var(--ink-soft);transition:color .15s ease;}
.lang-code.is-active{color:var(--ink);}
.lang-slash{color:var(--line);}
.lang-caret{width:13px;height:13px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;transition:transform .15s ease;}
.lang-switcher.is-open .lang-caret{transform:rotate(180deg);}
.lang-menu{position:absolute;z-index:120;top:calc(100% + 8px);right:0;display:none;min-width:144px;padding:5px;border:1px solid var(--line);border-radius:8px;background:var(--panel);box-shadow:0 14px 32px rgba(1,28,68,.12);}
.lang-switcher.is-open .lang-menu{display:block;}
.lang-option{display:flex;width:100%;align-items:center;justify-content:space-between;gap:14px;padding:9px 10px;border-radius:5px;color:var(--ink-soft);font-size:12px;text-align:left;}
.lang-option:hover,.lang-option.is-current{background:var(--stamp-soft);color:var(--stamp-deep);}
.lang-check{opacity:0;font-weight:800;}
.lang-option.is-current .lang-check{opacity:1;}
.utility-divider{width:1px;height:24px;margin:0 10px;background:var(--line);}
.utility-links{display:flex;align-items:flex-start;gap:17px;}
.toplinks .item{display:flex;min-inline-size:48px;min-height:43px;align-items:center;justify-content:flex-start;gap:4px;position:relative;padding:2px 4px 3px;border-radius:6px;color:var(--ink-soft);font-size:12px;white-space:nowrap;transition:color .15s ease,background .15s ease;}
.toplinks .item:hover{background:color-mix(in srgb,var(--stamp-soft) 52%,transparent);color:var(--stamp-deep);}
.toplinks .item .icon{width:19px;height:19px;flex:none;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.toplinks .item-label{line-height:1.2;}
.cart-badge{position:absolute;top:-4px;right:-6px;display:none;min-width:16px;height:16px;align-items:center;justify-content:center;padding:0 4px;border:1px solid var(--panel);border-radius:999px;background:var(--stamp);color:#fff;font-size:9px;font-weight:700;line-height:1;}

/* Product page. */
.detail-page{padding-top:38px;}
.breadcrumb{display:flex;align-items:center;gap:8px;min-height:22px;color:var(--ink-soft);font-size:12.5px;}
.breadcrumb a{transition:color .15s ease;}
.breadcrumb a:hover{color:var(--stamp-deep);}
.breadcrumb .slash{color:var(--line);}
.breadcrumb .current{overflow:hidden;color:var(--ink);font-weight:700;text-overflow:ellipsis;white-space:nowrap;}

.product-hero{display:grid;grid-template-columns:minmax(0,1fr);gap:24px;align-items:start;padding:24px 0 22px;border-bottom:1px solid var(--line);}
.product-media{min-width:0;}
.product-visual{position:relative;display:block;width:100%;min-height:0;aspect-ratio:5 / 1;overflow:hidden;padding:0;border:1px solid var(--poster-line);border-radius:10px;background:var(--poster-panel);}
.product-visual.is-placeholder{display:grid;place-items:center;color:var(--ink-soft);font-size:14px;}
.visual-poster-image{display:block;width:100%;height:100%;object-fit:contain;}
.visual-poster-picture{display:block;width:100%;height:100%;}

.product-purchase{display:grid;grid-template-columns:minmax(280px,.7fr) minmax(0,1.3fr);align-items:start;gap:clamp(28px,3vw,56px);min-width:0;padding:6px 0 0;}
.product-overview{display:flex;min-width:0;flex-direction:column;gap:0;padding:12px 0;}
.product-configuration{min-width:0;padding:22px 24px 16px;border:1px solid var(--poster-line);border-radius:12px;background:var(--poster-panel);}
.product-heading{min-width:0;}
.product-kicker{display:flex;align-items:center;flex-wrap:wrap;gap:9px;margin-bottom:8px;color:var(--ink-soft);font-size:12px;}
.product-kicker .status-dot{width:6px;height:6px;border-radius:50%;background:var(--green);}
.product-kicker strong{color:var(--green);font-weight:700;}
.product-purchase h1{margin:0;color:var(--ink);font-size:clamp(32px,2.4vw,36px);font-weight:800;line-height:1.18;letter-spacing:-.025em;overflow-wrap:anywhere;}
.product-tagline{max-width:60ch;margin:8px 0 0;color:var(--ink-soft);font-size:15px;line-height:1.55;}
.price-block{padding:18px 0;border-bottom:1px solid var(--line);}
.price-block--detailed{margin-top:24px;padding:0;border:0;border-radius:0;background:none;}
.price-summary{display:flex;flex-direction:column;align-items:flex-start;gap:12px;}
.price-summary>div:first-child{min-width:0;flex:1;}
.price-label{margin:0;color:var(--ink-soft);font-size:12px;}
.price-selection-summary{min-width:0;text-align:left;}
.price-selected{display:flex;min-width:0;align-items:baseline;justify-content:flex-end;gap:5px;color:var(--ink-soft);font-size:11px;line-height:1.35;}
.price-selected span{color:var(--stamp-deep);font-weight:700;}
.price-selected strong{overflow:hidden;color:var(--ink);font-size:12px;text-overflow:ellipsis;white-space:nowrap;}
.price-main{display:flex;align-items:baseline;flex-wrap:wrap;gap:8px;color:var(--ink);}
.price-block--detailed .price-main{gap:9px;margin-top:8px;}
.price-main strong{font-size:36px;line-height:1;font-weight:800;letter-spacing:-.035em;}
.price-main small{min-width:0;color:var(--ink-soft);font-size:13px;font-weight:400;overflow-wrap:anywhere;}
.price-original{color:var(--ink-soft);font-size:13px;text-decoration:line-through;}
.price-foot{display:flex;align-items:center;gap:12px;margin-top:6px;}
.saving-note{margin:0;color:var(--green);font-size:12px;font-weight:700;}
.price-note{color:var(--ink-soft);font-size:12px;font-weight:400;}
.price-detail{color:var(--ink-soft);font-size:13px;line-height:1.4;}
.product-spec{padding:0 0 18px;border-bottom:1px solid var(--line);}
.spec-heading{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:6px 14px;margin-bottom:14px;color:var(--ink);font-size:14px;font-weight:800;}
.variant-grid{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(180px,1fr);grid-template-rows:1fr;gap:10px;min-width:0;max-width:100%;overflow-x:auto;overscroll-behavior-x:contain;padding-bottom:6px;}
.variant-grid[data-plan-layout="compact"]{grid-auto-columns:minmax(168px,1fr);}
.variant-grid[data-plan-overflow="true"]{grid-auto-columns:minmax(max(168px,calc((100% - 50px)/6)),1fr);}
.variant-option{position:relative;display:grid;min-width:0;min-height:82px;grid-template-columns:minmax(0,1fr) auto 18px;gap:8px;align-items:center;padding:13px 12px;border:1px solid var(--line);border-radius:8px;background:var(--panel);text-align:left;transition:border-color .15s ease,background .15s ease,box-shadow .15s ease;}
.variant-option:hover{border-color:color-mix(in srgb,var(--stamp) 60%,var(--line));background:color-mix(in srgb,var(--stamp-soft) 24%,var(--panel));}
.variant-option.is-selected{border-color:var(--stamp);background:color-mix(in srgb,var(--stamp-soft) 48%,var(--panel));box-shadow:inset 3px 0 0 var(--stamp);}
.variant-option-copy{display:flex;min-width:0;flex-direction:column;gap:4px;}
.variant-option-title-row{display:flex;min-width:0;align-items:center;flex-wrap:wrap;gap:4px 6px;}
.variant-option-copy strong{display:-webkit-box;overflow:hidden;color:var(--ink);font-size:14px;line-height:1.45;overflow-wrap:anywhere;-webkit-line-clamp:2;-webkit-box-orient:vertical;}
.variant-option-copy small{overflow:hidden;color:var(--ink-soft);font-size:12px;line-height:1.35;text-overflow:ellipsis;white-space:nowrap;}
.variant-recommended{flex:none;padding:2px 5px;border-radius:3px;background:var(--green-soft);color:var(--green);font-size:9px;font-weight:700;line-height:1.25;}
.variant-option-price{display:flex;align-items:flex-end;flex-direction:column;gap:3px;white-space:nowrap;}
.variant-option-price em{min-height:12px;color:var(--ink-soft);font-size:10px;line-height:1.2;text-decoration:line-through;font-style:normal;}
.variant-current-price{display:flex;align-items:baseline;justify-content:flex-end;gap:3px;}
.variant-option-price strong{color:var(--ink);font-size:16px;line-height:1;}
.variant-option-price small{color:var(--ink-soft);font-size:12px;}
.variant-check{display:grid;width:19px;height:19px;place-items:center;border:1px solid var(--line);border-radius:50%;color:transparent;}
.variant-check svg{width:12px;height:12px;fill:none;stroke:currentColor;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round;}
.variant-option.is-selected .variant-check{border-color:var(--stamp);background:var(--stamp);color:#fff;}
.variant-grid[data-plan-layout="compact"] .variant-option{gap:6px;padding:10px;}
.variant-grid[data-plan-layout="compact"] .variant-option-title-row{flex-wrap:nowrap;}
.variant-grid[data-plan-layout="compact"] .variant-option-copy strong{line-height:20px;}
.variant-grid[data-plan-layout="compact"] .variant-option-copy small{line-height:16px;}
.plan-swipe-hint{margin:8px 0 0;color:var(--ink-soft);font-size:12px;line-height:1.6;}
.product-spec{position:relative;}
.product-spec.has-plan-edge::after{content:"";position:absolute;right:0;top:42px;bottom:48px;width:22px;pointer-events:none;background:linear-gradient(90deg,transparent,var(--poster-panel));}
.product-language-fallback{padding:12px 16px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--ink-soft);font-size:14px;line-height:1.6;}
@media (min-width:901px){
  .variant-grid[data-plan-overflow="false"],.variant-grid[data-plan-layout="compact"][data-plan-overflow="false"]{grid-auto-columns:minmax(168px,1fr);}
  .variant-grid[data-plan-layout="compact"] .variant-option{min-height:82px;grid-template-columns:minmax(0,1fr) auto 18px;gap:6px;padding:10px 8px;}
}
.selected-plan{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 15px;border:1px solid color-mix(in srgb,var(--stamp) 56%,var(--line));border-radius:7px;background:color-mix(in srgb,var(--stamp-soft) 48%,var(--panel));}
.selected-plan strong{display:block;color:var(--ink);font-size:13px;line-height:1.35;}
.selected-plan span{display:block;margin-top:3px;color:var(--ink-soft);font-size:11.5px;}
.selected-check{display:grid;width:21px;height:21px;flex:none;place-items:center;border-radius:50%;background:var(--stamp);color:#fff;}
.selected-check svg{width:13px;height:13px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;}
.quantity-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 0;}
.purchase-bar{display:flex;align-items:center;gap:20px;padding-top:18px;}
.purchase-bar .quantity-row{flex:none;flex-direction:column;align-items:flex-start;gap:7px;padding:0;}
.quantity-label{color:var(--ink);font-size:14px;font-weight:800;}
.quantity-control{display:flex;align-items:center;border:1px solid var(--line);border-radius:6px;background:var(--field);}
.quantity-control button{display:grid;width:33px;height:32px;place-items:center;color:var(--ink-soft);font-size:18px;line-height:1;transition:background .15s ease,color .15s ease;}
.quantity-control button:hover{background:var(--stamp-soft);color:var(--stamp-deep);}
.quantity-control button:disabled{cursor:not-allowed;opacity:.35;background:transparent;color:var(--ink-soft);}
.quantity-control input{width:44px;min-width:0;height:32px;padding:0 2px;border:0;border-radius:3px;background:transparent;color:var(--ink);font-family:inherit;font-size:16px;font-weight:700;text-align:center;}
.quantity-control:focus-within{border-color:var(--stamp);box-shadow:0 0 0 2px var(--stamp-soft);}
.quantity-control input:focus{outline:0;}
.quantity-control input[aria-invalid="true"]{color:var(--stamp-deep);}
.quantity-control input:disabled{cursor:not-allowed;opacity:.5;}
.quantity-feedback,.quantity-total{margin:10px 0 0;font-size:12px;font-weight:600;line-height:1.6;}
.quantity-feedback{color:var(--stamp-deep);}
.quantity-total{color:var(--ink);font-size:14px;font-variant-numeric:tabular-nums;}
.quantity-feedback[hidden],.quantity-total[hidden]{display:none;}
.purchase-actions{display:grid;flex:1;min-width:0;grid-template-columns:1fr 1.42fr;gap:10px;align-self:flex-end;}
.button-secondary,.button-primary{min-height:44px;border-radius:6px;font-size:14px;font-weight:700;transition:border-color .15s ease,background .15s ease,color .15s ease,transform .15s ease;}
.button-secondary{border:1px solid var(--line);background:var(--panel);color:var(--ink);}
.button-secondary:hover{border-color:var(--ink);}
.button-primary{background:var(--action-primary-bg);color:var(--action-primary-fg);}
.button-primary:hover{background:var(--action-primary-hover);}
.button-primary:active{background:var(--action-primary-active);transform:translateY(1px);}
.purchase-note{display:flex;gap:7px;margin:14px 0 0;color:var(--ink-soft);font-size:12px;font-weight:700;line-height:1.6;}
.purchase-note svg{width:15px;height:15px;flex:none;margin-top:2px;color:var(--stamp-deep);fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}

.product-section-nav{display:flex;align-items:center;min-height:68px;gap:34px;overflow-x:auto;border-bottom:1px solid var(--line);scrollbar-width:none;}
.product-section-nav::-webkit-scrollbar{display:none;}
.product-content-header{display:flex;min-width:0;align-items:center;gap:20px;border-bottom:1px solid var(--line);}
.product-content-header .product-section-nav{flex:1;min-width:0;border-bottom:0;}
.detail-selected-plan{display:flex;min-width:0;max-width:38%;gap:4px;margin:0;color:var(--ink-soft);font-size:12px;line-height:1.5;}
.detail-selected-plan span{flex:none;}
.detail-selected-plan strong{overflow:hidden;color:var(--ink);font-weight:600;text-overflow:ellipsis;white-space:nowrap;}
@media(max-width:640px){.product-content-header{flex-direction:column;align-items:stretch;gap:0;padding-bottom:10px;}.detail-selected-plan{max-width:100%;}}
.detail-tab{position:relative;display:inline-flex;min-height:68px;flex:none;align-items:center;padding:18px 0;color:var(--ink-soft);font-size:19px;font-weight:600;line-height:1.45;letter-spacing:.012em;transition:color .15s ease;}
.detail-tab:hover{color:var(--stamp-deep);}
.detail-tab::after{position:absolute;right:0;bottom:-1px;left:0;height:3px;background:transparent;content:"";transition:background .15s ease;}
.detail-tab.is-active{color:var(--ink);font-weight:700;}
.detail-tab.is-active::after{background:var(--stamp);}
.detail-panel{animation:detail-panel-in .18s ease both;}
.detail-panel[hidden]{display:none;}
@keyframes detail-panel-in{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}

.detail-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(245px,.3fr);gap:clamp(30px,3.5vw,60px);padding:34px 0 16px;}
.detail-section{padding:0 0 34px;border-bottom:1px solid var(--line);}
.detail-section + .detail-section{padding-top:34px;}
.section-heading{max-width:620px;}
.section-heading h2{margin:0;color:var(--ink);font-size:25px;line-height:1.25;letter-spacing:-.025em;}
.section-heading p{margin:10px 0 0;color:var(--ink-soft);font-size:14px;line-height:1.7;}
.detail-reading{margin-top:28px;border-top:1px solid var(--line);}
.detail-overview{padding:23px 0 25px;border-bottom:1px solid var(--line);}
.detail-reading-block h3,.key-facts h3{margin:0;color:var(--ink);font-size:16px;line-height:1.4;}
.detail-overview p{max-width:760px;margin:0;color:var(--ink-soft);font-size:13.5px;line-height:1.8;}
.detail-reading-columns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-bottom:1px solid var(--line);}
.detail-reading-block{padding:26px 30px 28px 0;}
.detail-reading-block + .detail-reading-block{padding-right:0;padding-left:30px;border-left:1px solid var(--line);}
.detail-reading-block--notice h3{color:var(--stamp-deep);}
.detail-reading-list{display:grid;gap:14px;margin:17px 0 0;padding:0;list-style:none;}
.detail-reading-list li{display:grid;grid-template-columns:18px minmax(0,1fr);gap:10px;align-items:start;}
.detail-list-mark{display:grid;width:18px;height:18px;place-items:center;border-radius:50%;background:var(--stamp-soft);color:var(--stamp-deep);}
.detail-list-mark svg{width:11px;height:11px;fill:none;stroke:currentColor;stroke-width:2.3;stroke-linecap:round;stroke-linejoin:round;}
.detail-reading-list strong{display:block;color:var(--ink);font-size:12.5px;line-height:1.5;}
.detail-reading-list p{margin:3px 0 0;color:var(--ink-soft);font-size:12px;line-height:1.65;}
.detail-reading-list--notice .detail-list-mark{background:color-mix(in srgb,var(--stamp-soft) 72%,var(--panel));}
.key-facts{margin-top:26px;}
.service-facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0;margin-top:14px;border-top:1px solid var(--line);}
.service-fact{min-height:92px;padding:17px 18px 16px 0;border-bottom:1px solid var(--line);}
.service-fact:nth-child(odd){padding-right:28px;border-right:1px solid var(--line);}
.service-fact:nth-child(even){padding-left:28px;}
.service-fact dt{margin:0 0 7px;color:var(--ink-soft);font-size:11.5px;}
.service-fact dd{margin:0;color:var(--ink);font-size:14px;font-weight:700;line-height:1.5;}
.steps{display:grid;gap:0;margin-top:26px;border-top:1px solid var(--line);}
.step{display:grid;grid-template-columns:78px minmax(0,1fr);gap:20px;padding:20px 0;border-bottom:1px solid var(--line);}
.step-number{color:var(--stamp);font-size:12px;font-weight:800;letter-spacing:.08em;}
.step h3{margin:0;color:var(--ink);font-size:15px;line-height:1.4;}
.step p{margin:5px 0 0;color:var(--ink-soft);font-size:13px;line-height:1.7;}
.rule-notice{display:flex;gap:16px;margin-top:25px;padding:18px 20px;border:1px solid color-mix(in srgb,var(--stamp) 39%,var(--line));border-radius:8px;background:linear-gradient(110deg,color-mix(in srgb,var(--stamp-soft) 56%,var(--panel)),var(--panel));}
.rule-notice svg{width:20px;height:20px;flex:none;margin-top:1px;color:var(--stamp-deep);fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;}
.rule-notice strong{display:block;color:var(--stamp-deep);font-size:13px;}
.rule-notice p{margin:5px 0 0;color:var(--ink-soft);font-size:12.5px;line-height:1.7;}

.after-sales-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));margin-top:28px;border-top:1px solid var(--line);}
.after-sales-item{display:grid;grid-template-columns:38px minmax(0,1fr);gap:16px;min-height:164px;padding:23px 28px 24px 0;border-bottom:1px solid var(--line);}
.after-sales-item:nth-child(even){padding-right:0;padding-left:28px;border-left:1px solid var(--line);}
.after-sales-index{color:var(--stamp);font-size:12px;font-weight:800;letter-spacing:.08em;line-height:1.5;}
.after-sales-item h3{margin:0;color:var(--ink);font-size:15px;line-height:1.45;}
.after-sales-item p{margin:8px 0 0;color:var(--ink-soft);font-size:12.5px;line-height:1.75;}
.after-sales-item--contact{background:color-mix(in srgb,var(--stamp-soft) 28%,transparent);}
.after-sales-actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:16px;}
.after-sales-actions .support-link{min-height:34px;padding-inline:12px;}
.after-sales-actions .support-link--primary{border-color:var(--action-primary-bg);background:var(--action-primary-bg);color:var(--action-primary-fg);}
.after-sales-actions .support-link--primary:hover{border-color:var(--action-primary-hover);background:var(--action-primary-hover);color:var(--action-primary-fg);}

.detail-aside{align-self:start;padding-top:3px;}
.aside-card{position:sticky;top:22px;padding:21px;border:1px solid var(--line);border-radius:8px;background:var(--panel);}
.aside-card h2{margin:0 0 16px;color:var(--ink);font-size:15px;}
.aside-card dl{display:grid;grid-template-columns:1fr;gap:14px;margin:0;}
.aside-card div{padding-bottom:13px;border-bottom:1px solid var(--line);}
.aside-card div:last-child{padding-bottom:0;border-bottom:0;}
.aside-card dt{margin:0 0 5px;color:var(--ink-soft);font-size:11px;}
.aside-card dd{margin:0;color:var(--ink);font-size:12.5px;font-weight:700;line-height:1.5;}
.aside-card--after-sales h2{color:var(--stamp-deep);}
.aside-card--after-sales dd{font-weight:600;}
.aside-tab-link{display:inline-flex;align-items:center;margin-top:17px;padding:0;color:var(--stamp-deep);font-size:12px;font-weight:700;}
.aside-tab-link:hover{text-decoration:underline;}
.aside-card dd .aside-tab-link{margin-top:0;font-size:inherit;line-height:inherit;text-align:left;}

/* Product content is written in the admin console. Keep it as one readable
   document instead of splitting it into synthetic sales and policy cards. */
.detail-rich-content{margin-top:0;padding-top:0;border-top:0;}
.detail-rich-content h3{margin:25px 0 10px;color:var(--ink);font-size:17px;line-height:1.45;letter-spacing:-.01em;}
.detail-rich-content h3:first-child{margin-top:0;}
.detail-rich-content p{margin:0 0 17px;color:var(--ink-soft);font-size:15px;line-height:1.8;}
.detail-rich-content p:last-child{margin-bottom:0;}
.detail-rich-content ul,.detail-rich-content ol{display:grid;gap:9px;margin:0 0 18px;padding-left:22px;color:var(--ink-soft);font-size:15px;line-height:1.8;}
.detail-rich-content li::marker{color:var(--stamp-deep);}
.detail-rich-content--after-sales p{color:color-mix(in srgb,var(--ink-soft) 88%,var(--ink));}
.detail-content-empty{color:var(--ink-soft)!important;}
.aside-card--summary{border-color:color-mix(in srgb,var(--line) 82%,var(--stamp-soft));}
.aside-card--summary dl{gap:12px;}
.aside-card--summary div{padding-bottom:11px;}

.support-band{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-top:16px;padding:26px 28px;border:1px solid var(--line);border-radius:9px;background:linear-gradient(105deg,var(--panel),color-mix(in srgb,var(--stamp-soft) 56%,var(--panel)));}
.support-band[hidden]{display:none;}
.support-band h2{margin:0;color:var(--ink);font-size:20px;letter-spacing:-.02em;}
.support-band p{margin:7px 0 0;color:var(--ink-soft);font-size:13px;line-height:1.6;}
.support-links{display:flex;flex:none;gap:9px;}
.support-link{display:inline-flex;min-height:37px;align-items:center;justify-content:center;padding:0 14px;border:1px solid var(--line);border-radius:5px;background:var(--panel);color:var(--ink);font-size:12px;font-weight:700;transition:border-color .15s ease,background .15s ease,color .15s ease;}
.support-link:hover{border-color:var(--stamp);background:var(--stamp-soft);color:var(--stamp-deep);}

.related-section{padding:48px 0 0;}
.related-heading{display:flex;align-items:end;justify-content:space-between;gap:22px;margin-bottom:20px;}
.related-heading h2{margin:0;color:var(--ink);font-size:24px;letter-spacing:-.025em;}
.related-heading p{margin:8px 0 0;color:var(--ink-soft);font-size:13px;}
.related-heading a{flex:none;color:var(--stamp-deep);font-size:12px;font-weight:700;}
.related-heading a:hover{text-decoration:underline;}
.related-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;}
.related-card{display:flex;min-height:188px;flex-direction:column;padding:16px;border:1px solid var(--line);border-radius:7px;background:var(--panel);transition:border-color .15s ease,box-shadow .15s ease,transform .15s ease;}
.related-card:hover{border-color:var(--action-primary-bg);box-shadow:0 10px 24px rgba(1,28,68,.07);transform:translateY(-2px);}
.related-category{display:inline-flex;align-self:flex-start;margin-bottom:13px;padding:3px 8px;border-radius:3px;background:var(--stamp-soft);color:var(--stamp-deep);font-size:10px;font-weight:700;}
.related-card h3{margin:0;color:var(--ink);font-size:15px;line-height:1.4;}
.related-card p{min-height:32px;margin:5px 0 0;color:var(--ink-soft);font-size:11.5px;line-height:1.45;}
.related-price{display:flex;align-items:baseline;gap:4px;margin-top:auto;padding-top:18px;color:var(--ink);}
.related-price strong{font-size:17px;line-height:1;}
.related-price small{color:var(--ink-soft);font-size:10.5px;}

/* Homepage-matched footer. */
footer{margin-top:48px;padding:24px 0 28px;border-top:1px solid var(--line);}
.foot-row{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;}
.foot-brand-block{display:flex;align-items:flex-start;flex-direction:column;gap:5px;}
.foot-brand{display:flex;align-items:center;gap:8px;color:var(--ink);font-size:14px;font-weight:700;}
.foot-brand .mark{width:20px;height:20px;flex:none;background:url("./yiang-favicon.svg") center/contain no-repeat;}
.foot-brand .brand-accent{color:var(--stamp-mid);}
.foot-copyright{color:var(--ink-soft);font-size:11px;line-height:1.2;}
.foot-links{display:flex;align-items:center;}
.foot-links a{color:var(--ink-soft);font-size:12px;transition:color .15s ease;}
.foot-links a:hover{color:var(--stamp-deep);}
.foot-links .sep{width:3px;height:3px;margin:0 10px;border-radius:50%;background:var(--line);}

/* Cart and compact status dialogs. */
.page-overlay{position:fixed;z-index:180;inset:0;display:none;background:rgba(1,28,68,.28);backdrop-filter:blur(2px);}
.page-overlay.is-visible{display:block;}
.cart-drawer{position:fixed;z-index:200;top:0;right:0;display:flex;width:min(406px,100vw);height:100dvh;transform:translateX(104%);flex-direction:column;border-left:1px solid var(--line);background:var(--panel);box-shadow:-16px 0 42px rgba(1,28,68,.13);transition:transform .24s ease;}
.cart-drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:20px 21px 17px;border-bottom:1px solid var(--line);}
.drawer-head h2{margin:0;color:var(--ink);font-size:18px;}
.icon-button{display:grid;width:32px;height:32px;place-items:center;border-radius:50%;color:var(--ink-soft);transition:background .15s ease,color .15s ease;}
.icon-button:hover{background:var(--stamp-soft);color:var(--stamp-deep);}
.icon-button svg,.dialog-close svg{width:17px;height:17px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;}
.drawer-body{flex:1;overflow:auto;padding:13px 21px;}
.cart-empty{display:grid;min-height:180px;place-items:center;color:var(--ink-soft);font-size:13px;text-align:center;line-height:1.7;}
.cart-item{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;padding:16px 0;border-bottom:1px solid var(--line);}
.cart-item-name{color:var(--ink);font-size:13px;font-weight:700;line-height:1.45;}
.cart-item-price{margin-top:5px;color:var(--ink-soft);font-size:11.5px;}
.cart-item-actions{display:flex;align-items:center;gap:7px;}
.cart-qty{display:flex;align-items:center;border:1px solid var(--line);border-radius:5px;}
.cart-qty button{display:grid;width:25px;height:27px;place-items:center;color:var(--ink-soft);font-size:15px;}
.cart-qty output{min-width:22px;color:var(--ink);font-size:11px;font-weight:700;text-align:center;}
.cart-remove{color:var(--stamp-deep);font-size:11px;}
.drawer-foot{padding:17px 21px 22px;border-top:1px solid var(--line);}
.total-row{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:11px;color:var(--ink);font-size:13px;font-weight:700;}
.total-row strong{font-size:19px;}
.checkout-note{margin:0 0 13px;color:var(--ink-soft);font-size:11.5px;line-height:1.5;}
.drawer-checkout{display:grid;width:100%;min-height:42px;place-items:center;border-radius:6px;background:var(--action-primary-bg);color:var(--action-primary-fg);font-size:13px;font-weight:700;}
.drawer-checkout:hover{background:var(--action-primary-hover);}

.site-dialog{position:fixed;z-index:220;inset:0;display:none;align-items:center;justify-content:center;padding:20px;background:rgba(1,28,68,.28);backdrop-filter:blur(2px);}
.site-dialog.is-open{display:flex;}
.dialog-card{position:relative;width:min(410px,100%);padding:29px 28px 25px;border:1px solid var(--line);border-radius:10px;background:var(--panel);box-shadow:0 24px 64px rgba(1,28,68,.18);}
.dialog-close{position:absolute;top:12px;right:12px;display:grid;width:32px;height:32px;place-items:center;border-radius:50%;color:var(--ink-soft);}
.dialog-close:hover{background:var(--stamp-soft);color:var(--stamp-deep);}
.dialog-eyebrow{margin:0 0 8px;color:var(--stamp-deep);font-size:11px;font-weight:800;letter-spacing:.08em;}
.dialog-card h2{margin:0;color:var(--ink);font-size:22px;line-height:1.3;}
.dialog-card p{margin:10px 0 0;color:var(--ink-soft);font-size:13px;line-height:1.7;}
.dialog-action{display:inline-flex;min-height:38px;align-items:center;justify-content:center;margin-top:21px;padding:0 15px;border-radius:5px;background:var(--action-primary-bg);color:var(--action-primary-fg);font-size:12px;font-weight:700;}
.dialog-action:hover{background:var(--action-primary-hover);}

.toast{position:fixed;z-index:240;bottom:28px;left:50%;max-width:calc(100vw - 32px);transform:translate(-50%,18px);padding:10px 14px;border-radius:6px;background:var(--ink);color:#fff;font-size:12.5px;box-shadow:0 10px 28px rgba(1,28,68,.18);opacity:0;pointer-events:none;transition:opacity .18s ease,transform .18s ease;}
.toast.is-visible{transform:translate(-50%,0);opacity:1;}

.back-to-top{position:fixed;z-index:70;right:clamp(24px,3vw,64px);bottom:28px;display:grid;width:40px;height:40px;place-items:center;border:1px solid var(--line);border-radius:50%;background:var(--panel);color:var(--ink);box-shadow:0 8px 20px rgba(1,28,68,.08);opacity:0;visibility:hidden;pointer-events:none;transform:translateY(8px);transition:opacity .18s ease,transform .18s ease,visibility 0s linear .18s;}
.back-to-top.is-visible{visibility:visible;pointer-events:auto;transform:translateY(0);opacity:1;transition:opacity .18s ease,transform .18s ease;}
.back-to-top:hover{border-color:var(--stamp);background:var(--stamp-soft);color:var(--stamp-deep);}
.back-to-top svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}

@media (max-width:1100px){
  .top-row{gap:13px;}
  .utility-links{gap:10px;}
  .toplinks .item{min-inline-size:auto;}
  .product-hero{gap:24px;}
  .related-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
}

@media (max-width:900px){
  .top{padding-top:13px;}
  .top-row{flex-wrap:wrap;}
  .search{order:3;width:100%;max-width:none;flex-basis:100%;}
  .toplinks{margin-left:auto;}
  .product-hero{grid-template-columns:1fr;gap:20px;}
  .product-visual{min-height:0;aspect-ratio:3 / 1;}
  .product-overview{grid-template-columns:1fr;gap:16px;}
  .product-purchase{grid-template-columns:minmax(0,1fr);gap:20px;max-width:none;}
  .product-overview{gap:0;padding:0;}
  .product-configuration{padding:20px 20px 14px;}
  .detail-grid{grid-template-columns:1fr;gap:0;}
  .detail-aside{display:none;}
  .after-sales-grid{grid-template-columns:1fr;}
  .after-sales-item,.after-sales-item:nth-child(even){padding:22px 0;border-left:0;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:767px){
  .product-visual{aspect-ratio:16 / 9;}
}

@media (max-width:640px){
  .page-shell{padding-inline:18px;}
  .brand-cn{font-size:20px;}
  .utility-divider{margin:0 6px;}
  .utility-links{gap:2px;}
  .toplinks .item{min-width:31px;padding-inline:5px;}
  .toplinks .item-label{display:none;}
  .detail-page{padding-top:27px;}
  .product-hero{padding-top:22px;}
  .product-visual{min-height:0;padding:0;aspect-ratio:16 / 9;}
  .product-purchase h1{font-size:32px;}
  .price-block--detailed{margin-top:18px;}
  .price-summary{gap:10px;}
  .price-detail{font-size:12px;}
  .product-configuration{padding:18px 16px 12px;}
  .variant-grid,.variant-grid[data-plan-layout="compact"],.variant-grid[data-plan-overflow="true"]{grid-auto-columns:minmax(168px,1fr);scroll-snap-type:x proximity;scroll-padding-inline:8px;}
  .variant-option{scroll-snap-align:center;}
  .quantity-control button{width:40px;height:40px;}
  .quantity-control input{height:40px;}
  .purchase-bar{display:grid;grid-template-columns:minmax(0,1fr);justify-content:stretch;gap:12px;}
  .purchase-bar .quantity-row{flex-direction:row;align-items:center;justify-content:space-between;}
  .purchase-actions{width:100%;}
  .detail-grid{padding-top:24px;}
  .detail-reading-columns{grid-template-columns:1fr;}
  .detail-reading-block{padding:22px 0;}
  .detail-reading-block + .detail-reading-block{padding:22px 0;border-top:1px solid var(--line);border-left:0;}
  .service-facts{grid-template-columns:1fr;}
  .service-fact,.service-fact:nth-child(odd),.service-fact:nth-child(even){padding:16px 0;border-right:0;}
  .after-sales-item{grid-template-columns:30px minmax(0,1fr);gap:12px;min-height:0;}
  .after-sales-actions{flex-direction:column;align-items:stretch;}
  .after-sales-actions .support-link{width:100%;}
  .step{grid-template-columns:50px minmax(0,1fr);gap:13px;}
  .support-band{align-items:flex-start;flex-direction:column;padding:22px;}
  .support-links{width:100%;}
  .support-link{flex:1;}
  .related-heading{align-items:flex-start;flex-direction:column;gap:4px;}
  .related-grid{grid-template-columns:1fr;}
  .related-card{min-height:150px;}
  footer{margin-top:39px;}
  .foot-row{align-items:flex-start;flex-direction:column;gap:15px;}
  .cart-drawer{width:min(390px,100vw);}
}

@media (max-width:420px){
}

@media (prefers-color-scheme:dark){
  :root{
    --paper:#12141C;
    --panel:#181B26;
    --poster-panel:#181B26;
    --poster-line:#2A2C31;
    --field:#11141E;
    --ink:#EDEBE4;
    --ink-soft:#A5A7AC;
    --line:#2A2C31;
    --stamp:#FF741C;
    --stamp-mid:#FF8538;
    --stamp-deep:#FF9A55;
    --stamp-soft:#382519;
    --green:#6FB7A1;
    --green-soft:#18342F;
    --action-primary-bg:#EDEBE4;
    --action-primary-fg:#12141C;
    --action-primary-hover:#FFFFFF;
    --action-primary-active:#D8D6CF;
  }
  .selected-plan{background:color-mix(in srgb,var(--stamp-soft) 78%,var(--panel));}
  .toast{background:#EDEBE4;color:#12141C;}
  .page-overlay{background:rgba(0,0,0,.52);}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important;}
}

.product-stock{font-size:14px;line-height:1.6;font-weight:600;color:#334b6c;margin:12px 0 6px;}
.product-stock.is-low{color:#c75608;}
.product-stock.is-sold-out{color:#7c6470;}