@font-face{font-family:Inter;src:url('../fonts/inter-variable-latin.woff2') format('woff2');font-weight:100 900;font-style:normal;font-display:swap}
html{overflow-x:hidden;overflow-y:scroll;scrollbar-color:#9aa3b2 #eef1f6;scrollbar-gutter:stable;scrollbar-width:thin}
html::-webkit-scrollbar{height:0;width:10px}
html::-webkit-scrollbar-track{background:#eef1f6}
html::-webkit-scrollbar-thumb{background:#9aa3b2;border:2px solid #eef1f6;border-radius:999px}
.niuniu-theme{--niu-bg:#fff;--niu-surface:#fff;--niu-muted:#eef1f6;--niu-text:#181d25;--niu-copy:#4e5562;--niu-border:#e7eaf0;--niu-action:#222934;--niu-focus:#6a11cb;--niu-radius:14px;--niu-shadow:0 8px 32px -12px rgba(102,110,122,.22);background:var(--niu-bg);color:var(--niu-copy);font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;margin:0;min-height:100vh}
.niuniu-theme[data-theme="dark"]{--niu-bg:#151922;--niu-surface:#1d2430;--niu-muted:#272f3d;--niu-text:#f5f7fb;--niu-copy:#b7c0ce;--niu-border:#354052;--niu-action:#f5f7fb}
.niuniu-container{box-sizing:border-box;margin:0 auto;max-width:1328px;padding-left:16px;padding-right:16px;width:100%}
.niuniu-theme :focus-visible{outline:3px solid color-mix(in srgb,var(--niu-focus) 55%,transparent);outline-offset:3px}
.niuniu-card{background:var(--niu-surface);border:1px solid var(--niu-border);border-radius:var(--niu-radius);box-shadow:var(--niu-shadow)}
@media (prefers-reduced-motion:reduce){.niuniu-theme *{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}}

html[data-niuniu-theme="dark"] .niuniu-theme{--niu-bg:#151922;--niu-surface:#1d2430;--niu-muted:#272f3d;--niu-text:#f5f7fb;--niu-copy:#b7c0ce;--niu-border:#354052;--niu-action:#f5f7fb}
@media (prefers-color-scheme:dark){html[data-niuniu-theme="auto"] .niuniu-theme{--niu-bg:#151922;--niu-surface:#1d2430;--niu-muted:#272f3d;--niu-text:#f5f7fb;--niu-copy:#b7c0ce;--niu-border:#354052;--niu-action:#f5f7fb}}
.niuniu-theme,.niuniu-theme *,.niuniu-theme *::before,.niuniu-theme *::after{box-sizing:border-box}
.niuniu-theme a{color:inherit;text-decoration:none}
.niuniu-theme button,.niuniu-theme input,.niuniu-theme select,.niuniu-theme textarea{font:inherit}
.niuniu-theme button{color:inherit}
.niuniu-theme img{display:block;max-width:100%}
.niuniu-theme [hidden]{display:none!important}
.niuniu-theme h1,.niuniu-theme h2,.niuniu-theme h3,.niuniu-theme p{margin-top:0}
.niuniu-theme h1,.niuniu-theme h2,.niuniu-theme h3{color:var(--niu-text);line-height:1.2}
.niuniu-theme--mobile{padding-bottom:70px}
.niuniu-drawer-open,.niuniu-dialog-open{overflow:hidden}
.niuniu-sr-only{height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px;clip:rect(0,0,0,0);white-space:nowrap}

.niuniu-alert{background:linear-gradient(90deg,#eef4ff,#f7f2ff);border-bottom:1px solid #dce6fb;color:#34405a;font-size:13px}
.niuniu-alert .niuniu-container{align-items:center;display:flex;gap:9px;justify-content:center;min-height:39px}
.niuniu-alert__button{align-items:center;background:transparent;border:0;color:inherit;cursor:pointer;display:flex;flex:1;gap:9px;justify-content:center;min-width:0;text-align:left}
.niuniu-alert__button:hover span{text-decoration:underline}
.niuniu-alert__dismiss{align-items:center;background:transparent;border:0;border-radius:50%;cursor:pointer;display:flex;flex:0 0 30px;height:30px;justify-content:center;margin-left:auto;width:30px}
.niuniu-alert__dismiss:hover{background:color-mix(in srgb,var(--niu-text) 8%,transparent)}
html[data-niuniu-theme="dark"] .niuniu-alert{background:#202939;border-color:#354052;color:#ced8e8}

.niuniu-header{backdrop-filter:blur(18px);background:color-mix(in srgb,var(--niu-bg) 92%,transparent);border-bottom:1px solid var(--niu-border);position:sticky;top:0;z-index:40}
.niuniu-header__row{align-items:center;display:flex;gap:20px;min-height:72px}
.niuniu-brand{align-items:center;display:inline-flex;gap:10px;min-width:0}
.niuniu-brand img{background:var(--niu-muted);border-radius:10px;height:40px;object-fit:contain;width:40px}
.niuniu-brand span{color:var(--niu-text);font-size:16px;font-weight:750;max-width:190px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.niuniu-header__nav{align-items:center;display:flex;gap:22px;margin-left:auto;white-space:nowrap}
.niuniu-header__nav a,.niuniu-header__nav button{background:transparent;border:0;cursor:pointer;font-size:14px;font-weight:600;padding:0;transition:color .18s ease}
.niuniu-header__nav a:hover,.niuniu-header__nav button:hover{color:var(--niu-focus)}
.niuniu-header__nav-item{align-items:center;display:flex;position:relative}
.niuniu-header__nav-submenu{background:var(--niu-surface);border:1px solid var(--niu-border);border-radius:11px;box-shadow:var(--niu-shadow);display:none;left:50%;min-width:180px;padding:7px;position:absolute;top:calc(100% + 14px);transform:translateX(-50%);z-index:70}
.niuniu-header__nav-submenu::before{content:"";height:16px;left:0;position:absolute;right:0;top:-16px}
.niuniu-header__nav-item:hover .niuniu-header__nav-submenu,.niuniu-header__nav-item:focus-within .niuniu-header__nav-submenu{display:grid}
.niuniu-header__nav-submenu a{border-radius:8px;padding:9px 11px}
.niuniu-header__nav-submenu a:hover{background:var(--niu-muted)}
.niuniu-header__search,.niuniu-mobile-search{align-items:center;background:var(--niu-muted);border:1px solid transparent;border-radius:999px;display:flex;overflow:hidden}
.niuniu-header__search{max-width:230px;width:18vw}
.niuniu-header__search:focus-within,.niuniu-mobile-search:focus-within{background:var(--niu-surface);border-color:var(--niu-focus)}
.niuniu-header__search input,.niuniu-mobile-search input{background:transparent;border:0;color:var(--niu-text);min-width:0;outline:0;padding:10px 4px 10px 14px;width:100%}
.niuniu-header__search button,.niuniu-mobile-search button{background:transparent;border:0;cursor:pointer;padding:10px 13px}
.niuniu-language{position:relative}
.niuniu-language__toggle{align-items:center;background:transparent;border:0;cursor:pointer;display:flex;font-size:12px;font-weight:650;gap:5px;padding:8px 2px}
.niuniu-language__toggle i{font-size:11px;transition:transform .18s ease}
.niuniu-language__toggle[aria-expanded="true"] i{transform:rotate(180deg)}
.niuniu-language__menu{background:var(--niu-surface);border:1px solid var(--niu-border);border-radius:11px;box-shadow:var(--niu-shadow);display:grid;min-width:150px;padding:7px;position:absolute;right:0;top:calc(100% + 8px);z-index:60}
.niuniu-language__menu[hidden]{display:none!important}
.niuniu-language__menu a{border-radius:8px;font-size:12px;font-weight:650;padding:9px 11px}
.niuniu-language__menu a:hover{background:var(--niu-muted);color:var(--niu-focus)}
.niuniu-announcement-content{line-height:1.75}
.niuniu-announcement-content>:last-child{margin-bottom:0}
.niuniu-announcement-content img{height:auto;max-width:100%}
.niuniu-icon-button{align-items:center;background:var(--niu-surface);border:1px solid var(--niu-border);border-radius:11px;cursor:pointer;display:inline-flex;height:42px;justify-content:center;min-width:42px;padding:0}
.niuniu-icon-button:hover{background:var(--niu-muted)}
.niuniu-category-strip{align-items:center;display:flex;gap:20px;min-height:42px;overflow-x:auto;scrollbar-width:none;white-space:nowrap}
.niuniu-category-strip::-webkit-scrollbar{display:none}
.niuniu-category-strip a{font-size:13px;font-weight:600}
.niuniu-mobile-header .niuniu-header__row{justify-content:space-between;min-height:60px}
.niuniu-mobile-header .niuniu-brand span{max-width:150px}
.niuniu-mobile-header__actions{display:flex;gap:8px}
.niuniu-mobile-search{margin-bottom:10px;max-width:calc(100% - 32px);padding-left:0;padding-right:0}
.niuniu-mobile-search input{padding-bottom:9px;padding-top:9px}

.niuniu-main,.niuniu-page{min-height:52vh}
.niuniu-section{padding:58px 0}
.niuniu-section--muted{background:var(--niu-muted)}
.niuniu-section-heading{align-items:end;display:flex;gap:18px;justify-content:space-between;margin-bottom:24px}
.niuniu-section-heading h1,.niuniu-section-heading h2{font-size:clamp(24px,3vw,38px);margin-bottom:6px}
.niuniu-section-heading p{margin-bottom:0;max-width:650px}
.niuniu-button{align-items:center;background:var(--niu-action);border:1px solid var(--niu-action);border-radius:11px;color:var(--niu-bg)!important;cursor:pointer;display:inline-flex;font-weight:700;gap:8px;justify-content:center;min-height:44px;padding:10px 18px}
.niuniu-button--secondary{background:var(--niu-surface);border-color:var(--niu-border);color:var(--niu-text)!important}

.niuniu-hero{background:var(--niu-muted);border-radius:20px;min-height:420px;overflow:hidden;position:relative}
.niuniu-hero__slide{align-items:center;background-position:center;background-size:cover;display:flex;min-height:420px;padding:48px}
.niuniu-hero__slide--one{background-image:url('../images/hero-1.webp')}
.niuniu-hero__slide--two{background-image:url('../images/hero-2.webp')}
.niuniu-hero__slide--three{background-image:url('../images/hero-3.webp')}
.niuniu-hero__content{max-width:48%;position:relative;z-index:1}
.niuniu-hero__content h1{font-size:clamp(34px,4.4vw,62px);letter-spacing:-.04em;margin-bottom:18px}
.niuniu-hero__content p{font-size:17px;line-height:1.7;max-width:540px}
.niuniu-hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.niuniu-hero__content .niuniu-hero__actions{margin-top:0}
.niuniu-wechat-action{display:inline-flex;position:relative}
.niuniu-wechat-action__button i{font-size:18px}
.niuniu-wechat-action__popover{background:var(--niu-surface);border:1px solid var(--niu-border);border-radius:14px;bottom:0;box-shadow:var(--niu-shadow);left:calc(100% + 12px);opacity:0;padding:10px;pointer-events:none;position:absolute;transform:translateX(-6px);transition:opacity .18s ease,transform .18s ease,visibility .18s ease;visibility:hidden;width:132px;z-index:8}
.niuniu-wechat-action__popover img{border-radius:9px;display:block;height:110px;object-fit:cover;width:110px}
.niuniu-wechat-action:hover .niuniu-wechat-action__popover,.niuniu-wechat-action:focus-within .niuniu-wechat-action__popover{opacity:1;pointer-events:auto;transform:translateX(0);visibility:visible}

.niuniu-tabs{align-items:center;border-bottom:1px solid var(--niu-border);display:flex;gap:6px;overflow-x:auto}
.niuniu-tabs button,.niuniu-tabs a,[data-niuniu-category-tab]{background:transparent;border:0;border-bottom:3px solid transparent;color:var(--niu-copy);cursor:pointer;font-weight:650;padding:12px 16px;white-space:nowrap}
.niuniu-tabs button.is-active,.niuniu-tabs button[aria-selected="true"],[data-niuniu-category-tab].is-active,[data-niuniu-category-tab][aria-pressed="true"]{border-color:var(--niu-focus);color:var(--niu-text)}
.niuniu-category-tabs{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:22px}
.niuniu-category-tabs [data-niuniu-category-tab]{background:var(--niu-muted);border:1px solid transparent;border-radius:999px;padding:9px 15px}
.niuniu-category-tabs [aria-pressed="true"]{background:var(--niu-surface);border-color:var(--niu-focus)}

.niuniu-product-grid{display:grid;gap:18px;grid-template-columns:repeat(6,minmax(0,1fr))}
.niuniu-product-card{min-width:0;overflow:hidden;transition:transform .18s ease,box-shadow .18s ease}
.niuniu-product-card:hover{box-shadow:0 18px 44px -20px rgba(78,85,98,.4);transform:translateY(-3px)}
.niuniu-product-card__media{aspect-ratio:1;background:var(--niu-muted);overflow:hidden;position:relative}
.niuniu-product-card__media img{height:100%;object-fit:cover;width:100%}
.niuniu-product-card__body{padding:15px}
.niuniu-product-card__body h2,.niuniu-product-card__body h3{font-size:15px;margin-bottom:10px}
.niuniu-product-card__meta{align-items:center;display:flex;font-size:12px;gap:8px;justify-content:space-between}
.niuniu-product-card__meta strong{color:var(--niu-text);font-size:16px}

.niuniu-purchase-layout{align-items:start;display:grid;gap:30px;grid-template-columns:minmax(0,1.05fr) minmax(340px,.95fr)}
.niuniu-purchase-media{overflow:hidden;padding:20px}
.niuniu-purchase-media img{aspect-ratio:1;border-radius:12px;object-fit:cover;width:100%}
.niuniu-purchase-panel{padding:26px;position:sticky;top:104px}
.niuniu-purchase-panel h1{font-size:32px;margin-bottom:12px}
.niuniu-field{display:grid;gap:7px;margin-top:16px}
.niuniu-field label{color:var(--niu-text);font-size:13px;font-weight:700}
.niuniu-field input,.niuniu-field select,.niuniu-field textarea{background:var(--niu-bg);border:1px solid var(--niu-border);border-radius:10px;color:var(--niu-text);min-height:44px;padding:10px 12px;width:100%}
.niuniu-quantity{align-items:center;display:flex;gap:8px}
.niuniu-quantity button{background:var(--niu-muted);border:0;border-radius:9px;cursor:pointer;height:42px;width:42px}
.niuniu-quantity input{max-width:100px;text-align:center}

.niuniu-payment-options{display:grid;gap:10px;grid-template-columns:repeat(4,minmax(0,1fr));margin:18px 0}
.niuniu-pay-option{align-items:center;background:var(--niu-surface);border:1px solid var(--niu-border);border-radius:11px;cursor:pointer;display:flex;justify-content:center;min-height:48px;padding:10px}
.niuniu-pay-option:hover,.niuniu-pay-option.is-selected,.niuniu-pay-option[aria-pressed="true"]{border-color:var(--niu-focus);box-shadow:0 0 0 2px color-mix(in srgb,var(--niu-focus) 18%,transparent);color:var(--niu-text)}

.niuniu-lookup{display:grid;gap:22px;grid-template-columns:minmax(260px,.7fr) minmax(0,1.3fr)}
.niuniu-lookup-card{padding:24px}
.niuniu-order-tabs{display:grid;gap:8px;grid-template-columns:repeat(3,minmax(0,1fr));margin-bottom:20px}
.niuniu-order-tabs [data-niuniu-order-tab]{background:var(--niu-muted);border:1px solid transparent;border-radius:10px;cursor:pointer;padding:11px}
.niuniu-order-tabs [aria-selected="true"]{background:var(--niu-surface);border-color:var(--niu-focus);color:var(--niu-text)}
.niuniu-order-history{display:grid;gap:12px}
.niuniu-order-history__item{padding:16px}

.niuniu-article-layout{align-items:start;display:grid;gap:28px;grid-template-columns:minmax(0,1fr) 310px}
.niuniu-article-rich{font-size:16px;line-height:1.85;padding:30px}
.niuniu-article-rich h1,.niuniu-article-rich h2,.niuniu-article-rich h3{margin:1.6em 0 .7em}
.niuniu-article-rich p{margin-bottom:1.15em}
.niuniu-article-rich img,.niuniu-article-rich video{border-radius:12px;height:auto;max-width:100%}
.niuniu-article-rich blockquote{background:var(--niu-muted);border-left:4px solid var(--niu-focus);margin:20px 0;padding:15px 18px}
.niuniu-article-rich table{border-collapse:collapse;display:block;max-width:100%;overflow:auto}
.niuniu-article-rich td,.niuniu-article-rich th{border:1px solid var(--niu-border);padding:10px}
.niuniu-article-rail{padding:20px;position:sticky;top:104px}

.niuniu-empty{align-items:center;background:var(--niu-muted);border:1px dashed var(--niu-border);border-radius:var(--niu-radius);color:var(--niu-copy);display:flex;justify-content:center;min-height:150px;padding:28px;text-align:center}
.niuniu-dialog-layer{align-items:center;display:flex;inset:0;justify-content:center;padding:16px;position:fixed;z-index:100}
.niuniu-dialog-layer[hidden]{display:none!important}
.niuniu-dialog-layer__backdrop{backdrop-filter:blur(4px);background:rgba(15,20,29,.58);border:0;inset:0;position:absolute;width:100%}
.niuniu-dialog{background:var(--niu-surface);border:1px solid var(--niu-border);border-radius:var(--niu-radius);box-shadow:var(--niu-shadow);max-height:calc(100vh - 32px);overflow:auto;position:relative;width:min(560px,100%);z-index:1}
.niuniu-dialog__header,.niuniu-dialog__body,.niuniu-dialog__footer{padding:20px 24px}
.niuniu-dialog__header{align-items:center;border-bottom:1px solid var(--niu-border);display:flex;justify-content:space-between}
.niuniu-dialog__footer{border-top:1px solid var(--niu-border);display:flex;gap:10px;justify-content:flex-end}
.niuniu-dialog__contact-list{align-items:flex-start;display:flex;flex-wrap:wrap;gap:16px 20px}
.niuniu-dialog__contact-item{align-items:center;background:var(--niu-muted);border:1px solid var(--niu-border);border-radius:12px;display:flex;flex-direction:column;gap:10px;justify-content:center;min-height:52px;padding:12px 14px}
.niuniu-dialog__contact-label{align-items:center;color:var(--niu-text);display:flex;font-size:14px;font-weight:750;gap:7px}
.niuniu-dialog__contact-label i{font-size:20px}
.niuniu-dialog__contact-item--qr img{border-radius:8px;height:88px;object-fit:cover;width:88px}

.niuniu-drawer{inset:0;position:fixed;z-index:90}
.niuniu-drawer__backdrop{background:rgba(15,20,29,.56);border:0;inset:0;position:absolute;width:100%}
.niuniu-drawer__panel{background:var(--niu-surface);box-shadow:18px 0 60px rgba(15,20,29,.24);height:100%;left:0;max-width:86vw;overflow-y:auto;padding:18px;position:absolute;top:0;width:340px}
.niuniu-drawer__panel>header{align-items:center;border-bottom:1px solid var(--niu-border);display:flex;justify-content:space-between;padding-bottom:14px}
.niuniu-drawer__nav{display:grid;gap:6px;padding:18px 0}
.niuniu-drawer__nav a,.niuniu-drawer__nav button{align-items:center;background:transparent;border:0;border-radius:10px;cursor:pointer;display:flex;font-weight:650;gap:12px;padding:12px;text-align:left;width:100%}
.niuniu-drawer__nav a:hover,.niuniu-drawer__nav button:hover{background:var(--niu-muted)}
.niuniu-drawer__mall-item{display:grid;gap:2px}
.niuniu-drawer__mall-subnav{border-left:2px solid var(--niu-border);display:grid;gap:2px;margin-left:23px;padding-left:10px}
.niuniu-drawer__mall-subnav a{font-size:13px;font-weight:550;padding:9px 10px}
.niuniu-drawer__languages{border-top:1px solid var(--niu-border);display:flex;flex-wrap:wrap;gap:8px;padding-top:16px}
.niuniu-drawer__languages a{background:var(--niu-muted);border-radius:999px;font-size:12px;padding:8px 12px}

.niuniu-footer{background:var(--niu-muted);border-top:1px solid var(--niu-border);margin-top:56px;padding:48px 0 20px}
.niuniu-footer__grid{display:grid;gap:34px;grid-template-columns:1.4fr repeat(3,1fr)}
.niuniu-footer h2{font-size:14px;margin-bottom:15px}
.niuniu-footer nav{display:grid;gap:10px}
.niuniu-footer nav a{font-size:13px}
.niuniu-footer p{font-size:13px;line-height:1.65;margin-bottom:8px}
.niuniu-footer__brand p{margin-top:16px;max-width:360px}
.niuniu-footer__contacts{align-items:flex-start;display:flex;flex-wrap:wrap;gap:16px 20px}
.niuniu-footer__contact{align-items:center;background:var(--niu-surface);border:1px solid var(--niu-border);border-radius:12px;display:flex;justify-content:center;overflow:hidden}
.niuniu-footer__contact--icon{height:42px;width:42px}
.niuniu-footer__contact i{color:var(--niu-text);font-size:22px}
.niuniu-footer__contact--qr{display:grid;gap:7px;grid-template-columns:24px 72px;padding:6px}
.niuniu-footer__contact--qr img{border-radius:8px;height:72px;object-fit:cover;width:72px}
.niuniu-footer__social{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.niuniu-footer__social img{border-radius:50%;height:34px;object-fit:cover;width:34px}
.niuniu-footer__bottom{align-items:center;border-top:1px solid var(--niu-border);display:flex;font-size:12px;justify-content:space-between;margin-top:32px;padding-top:18px}
.niuniu-bottom-nav{background:color-mix(in srgb,var(--niu-surface) 94%,transparent);border-top:1px solid var(--niu-border);bottom:0;display:none;grid-template-columns:repeat(5,1fr);left:0;padding-bottom:env(safe-area-inset-bottom);position:fixed;right:0;z-index:45}
.niuniu-bottom-nav a{align-items:center;display:flex;flex-direction:column;font-size:11px;gap:4px;justify-content:center;min-height:58px}
.niuniu-bottom-nav i{font-size:18px}
.niuniu-bottom-nav a.is-active{color:var(--niu-focus);font-weight:750}

@media (max-width:1199px){
  .niuniu-header__row{gap:14px}
  .niuniu-header__nav{gap:14px}
  .niuniu-header__search{max-width:190px}
  .niuniu-language{display:none}
  .niuniu-product-grid{grid-template-columns:repeat(5,minmax(0,1fr))}
  .niuniu-footer__grid{grid-template-columns:1.25fr repeat(2,1fr)}
}
@media (max-width:991px){
  .niuniu-theme--desktop .niuniu-header__nav{display:none}
  .niuniu-header__search{margin-left:auto;width:260px}
  .niuniu-product-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
  .niuniu-purchase-layout,.niuniu-lookup,.niuniu-article-layout{grid-template-columns:1fr}
  .niuniu-purchase-panel,.niuniu-article-rail{position:static}
  .niuniu-footer__grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767px){
  .niuniu-wechat-action__popover{bottom:calc(100% + 12px);left:50%;transform:translate(-50%,6px)}
  .niuniu-wechat-action:hover .niuniu-wechat-action__popover,.niuniu-wechat-action:focus-within .niuniu-wechat-action__popover{transform:translate(-50%,0)}
  .niuniu-section{padding:38px 0}
  .niuniu-section-heading{align-items:start;flex-direction:column}
  .niuniu-hero,.niuniu-hero__slide{min-height:360px}
  .niuniu-hero__slide{background-position:58% center;padding:28px}
  .niuniu-hero__content{max-width:64%}
  .niuniu-hero__content h1{font-size:34px}
  .niuniu-product-grid{gap:12px;grid-template-columns:repeat(2,minmax(0,1fr))}
  .niuniu-product-card__body{padding:12px}
  .niuniu-purchase-panel,.niuniu-lookup-card,.niuniu-article-rich{padding:20px}
  .niuniu-payment-options{grid-template-columns:repeat(2,minmax(0,1fr))}
  .niuniu-footer{padding-top:36px}
  .niuniu-footer__grid{grid-template-columns:1fr 1fr}
  .niuniu-footer__brand{grid-column:1/-1}
  .niuniu-bottom-nav{display:grid}
}
@media (max-width:575px){
  .niuniu-container{padding-left:12px;padding-right:12px}
  .niuniu-header__row{gap:9px}
  .niuniu-mobile-header .niuniu-brand span{max-width:118px}
  .niuniu-mobile-header .niuniu-brand img{height:36px;width:36px}
  .niuniu-mobile-header .niuniu-icon-button{height:38px;min-width:38px}
  .niuniu-hero,.niuniu-hero__slide{min-height:330px}
  .niuniu-hero__slide{background-position:62% center;padding:22px}
  .niuniu-hero__content{max-width:72%}
  .niuniu-hero__content h1{font-size:29px}
  .niuniu-product-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .niuniu-order-tabs{gap:5px}
  .niuniu-order-tabs [data-niuniu-order-tab]{font-size:12px;padding:10px 6px}
  .niuniu-footer__grid{grid-template-columns:1fr}
  .niuniu-footer__brand{grid-column:auto}
  .niuniu-footer__bottom{align-items:flex-start;flex-direction:column;gap:7px}
}
@media (max-width:329px){
  .niuniu-product-grid{grid-template-columns:1fr}
  .niuniu-mobile-header .niuniu-brand span{display:none}
}
/* Task 4: desktop storefront and article pages */
.niuniu-kicker{color:var(--niu-focus);display:inline-block;font-size:12px;font-weight:800;letter-spacing:.12em;margin-bottom:12px;text-transform:uppercase}
.niuniu-theme--desktop .niuniu-home__hero-wrap{padding-top:38px}
.niuniu-theme--desktop .niuniu-hero{box-shadow:0 28px 74px -48px rgba(27,31,42,.36);height:344px;min-height:344px}
.niuniu-theme--desktop .niuniu-hero__slide{background-image:none;display:none;height:344px;inset:0;min-height:344px;overflow:hidden;position:absolute;width:100%}
.niuniu-theme--desktop .niuniu-hero__slide.is-active{display:flex}
.niuniu-theme--desktop .niuniu-hero__slide::after{background:linear-gradient(90deg,var(--niu-muted) 0%,color-mix(in srgb,var(--niu-muted) 94%,transparent) 43%,transparent 68%);content:"";inset:0;pointer-events:none;position:absolute}
.niuniu-theme--desktop .niuniu-hero__slide>img{height:100%;margin-left:auto;object-fit:cover;width:58%}
.niuniu-theme--desktop .niuniu-hero__content{left:48px;max-width:520px;position:absolute;top:50%;transform:translateY(-50%);z-index:2}
.niuniu-theme--desktop .niuniu-hero__content h1,.niuniu-theme--desktop .niuniu-hero__content h2{font-size:clamp(38px,4vw,60px);letter-spacing:-.045em;margin-bottom:16px}
.niuniu-theme--desktop .niuniu-hero__content p{font-size:16px;line-height:1.7;margin-bottom:24px;max-width:440px}
.niuniu-hero__controls{align-items:center;bottom:18px;display:flex;gap:10px;left:50%;position:absolute;transform:translateX(-50%);z-index:4}
.niuniu-hero__arrow{align-items:center;background:color-mix(in srgb,var(--niu-surface) 90%,transparent);border:1px solid var(--niu-border);border-radius:50%;cursor:pointer;display:flex;height:38px;justify-content:center;width:38px}
.niuniu-hero__status{align-items:center;display:flex;gap:7px}
.niuniu-hero__status [data-niuniu-hero-go]{background:color-mix(in srgb,var(--niu-text) 28%,transparent);border:0;border-radius:999px;cursor:pointer;height:8px;padding:0;transition:width .18s ease,background .18s ease;width:8px}
.niuniu-hero__status [data-niuniu-hero-go].is-active,.niuniu-hero__status [data-niuniu-hero-go][aria-pressed="true"]{background:var(--niu-focus);width:24px}
.niuniu-reduced-motion .niuniu-hero__status [data-niuniu-hero-go]{transition:none}
.niuniu-home-controls{align-items:flex-end;display:flex;gap:28px;justify-content:space-between;margin-bottom:28px}
.niuniu-category-pills{display:flex;flex:1;flex-wrap:wrap;gap:9px}
.niuniu-category-pills [data-niuniu-category-tab]{background:var(--niu-muted);border:1px solid transparent;border-radius:999px;cursor:pointer;font-weight:650;min-height:42px;padding:9px 16px}
.niuniu-category-pills [data-niuniu-category-tab].is-active,.niuniu-category-pills [data-niuniu-category-tab][aria-pressed="true"]{background:var(--niu-action);border-color:var(--niu-action);color:var(--niu-bg)}
.niuniu-search{align-items:center;background:var(--niu-surface);border:1px solid var(--niu-border);border-radius:999px;display:flex;flex:0 0 300px;min-height:46px;padding:0 16px}
.niuniu-search:focus-within{border-color:var(--niu-border);box-shadow:none}
.niuniu-search i{color:var(--niu-copy)}
.niuniu-search input{background:transparent;border:0;color:var(--niu-text);min-width:0;outline:0;padding:11px;width:100%}
.niuniu-theme--desktop .niuniu-product-card{background:var(--niu-surface);border:1px solid var(--niu-border);border-radius:15px}
.niuniu-theme--desktop .niuniu-product-card[data-niuniu-sold-out-trigger]{cursor:pointer}
.niuniu-theme--desktop .niuniu-product-card__media{border-radius:12px;margin:18px 18px 0}
.niuniu-delivery-badge{background:color-mix(in srgb,var(--niu-surface) 88%,transparent);border-radius:999px;color:var(--niu-text);font-size:10px;font-weight:750;left:8px;padding:5px 8px;position:absolute;top:8px}
.niuniu-sold-out{align-items:center;background:rgba(23,28,38,.68);color:#fff;display:flex;font-size:13px;font-weight:800;inset:0;justify-content:center;letter-spacing:.08em;position:absolute}
.niuniu-product-card__body h2,.niuniu-product-card__body h3{display:-webkit-box;line-height:1.45;min-height:43px;overflow:hidden;-webkit-box-orient:vertical;-webkit-line-clamp:2}
.niuniu-product-card__meta span{color:var(--niu-copy)}
.niuniu-stock-progress{background:var(--niu-muted);border-radius:99px;height:4px;margin-top:12px;overflow:hidden}
.niuniu-stock-progress span{background:var(--niu-focus);border-radius:inherit;display:block;height:100%}
.niuniu-page-heading{background:var(--niu-muted);border-bottom:1px solid var(--niu-border);padding:36px 0}
.niuniu-page-heading h1{font-size:clamp(30px,3.5vw,46px);margin:14px 0 8px}
.niuniu-page-heading p{margin-bottom:0}
.niuniu-breadcrumb{align-items:center;color:var(--niu-copy);display:flex;flex-wrap:wrap;font-size:13px;gap:8px;margin-bottom:20px}
.niuniu-breadcrumb a:hover{color:var(--niu-focus)}
.niuniu-catalog-layout{align-items:start;display:grid;gap:28px;grid-template-columns:246px minmax(0,1fr)}
.niuniu-catalog-sidebar{display:grid;gap:4px;padding:18px;position:sticky;top:104px}
.niuniu-catalog-sidebar h2{font-size:17px;margin:2px 10px 12px}
.niuniu-catalog-sidebar a{border-radius:9px;font-size:13px;font-weight:650;line-height:1.4;padding:10px}
.niuniu-catalog-sidebar a:hover,.niuniu-catalog-sidebar a.is-active{background:var(--niu-muted);color:var(--niu-text)}
.niuniu-catalog-sidebar__sub{color:var(--niu-copy);padding-left:24px!important}
.niuniu-catalog-toolbar{align-items:center;background:var(--niu-surface);border:1px solid var(--niu-border);border-radius:13px;display:flex;gap:10px;justify-content:flex-end;margin-bottom:22px;padding:13px 16px}
.niuniu-catalog-toolbar>div{display:grid;margin-right:auto}
.niuniu-catalog-toolbar>div span{color:var(--niu-copy);font-size:12px}
.niuniu-catalog-toolbar label{font-size:13px;font-weight:650}
.niuniu-catalog-toolbar select{background:var(--niu-bg);border:1px solid var(--niu-border);border-radius:9px;color:var(--niu-text);min-height:39px;padding:7px 10px}
.niuniu-theme--desktop .niuniu-catalog-results .niuniu-product-grid{grid-template-columns:repeat(5,minmax(0,1fr))}
.niuniu-catalog-pagination,.niuniu-pagination{align-items:center;display:flex;gap:10px;justify-content:center;margin-top:28px}
.niuniu-catalog-pagination button,.niuniu-pagination button,.niuniu-pagination a{background:var(--niu-surface);border:1px solid var(--niu-border);border-radius:9px;color:var(--niu-text);cursor:pointer;min-height:40px;min-width:40px;padding:8px 12px}
.niuniu-theme button:disabled{cursor:not-allowed;opacity:.55}
.niuniu-catalog-pagination button:disabled{cursor:not-allowed;opacity:.45}
.niuniu-quantity button:disabled{cursor:not-allowed;opacity:.45}
.niuniu-article-heading{padding-bottom:28px}
.niuniu-article-categories{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.niuniu-article-category{background:color-mix(in srgb,var(--niu-surface) 72%,transparent);border:1px solid var(--niu-border);border-radius:999px;color:var(--niu-copy);cursor:pointer;font-weight:650;min-height:40px;padding:8px 15px}
.niuniu-article-category.is-active,.niuniu-article-category[aria-pressed="true"]{background:var(--niu-action);border-color:var(--niu-action);color:var(--niu-bg)}
.niuniu-article-list{display:grid;gap:18px}
.niuniu-article-card{display:grid;grid-template-columns:270px minmax(0,1fr);min-height:186px;overflow:hidden}
.niuniu-article-card__media{background:var(--niu-muted);min-height:186px}
.niuniu-article-card__media img{height:100%;object-fit:cover;width:100%}
.niuniu-article-card__body{align-content:center;display:grid;padding:24px 28px}
.niuniu-article-card__category{color:var(--niu-focus);font-size:11px;font-weight:800;margin-bottom:8px}
.niuniu-article-card__body h2{font-size:21px;margin-bottom:10px}
.niuniu-article-card__body p{color:var(--niu-copy);display:-webkit-box;line-height:1.65;margin-bottom:16px;overflow:hidden;-webkit-box-orient:vertical;-webkit-line-clamp:2}
.niuniu-article-card__meta{color:var(--niu-copy);display:flex;font-size:12px;gap:20px}
.niuniu-article-detail-card{margin:0 auto;max-width:960px;padding:50px clamp(28px,5vw,72px)}
.niuniu-article-detail__header{border-bottom:1px solid var(--niu-border);margin-bottom:34px;padding-bottom:30px;text-align:center}
.niuniu-article-detail__header h1{font-size:clamp(32px,4vw,52px);letter-spacing:-.035em;margin:4px auto 18px;max-width:820px}
.niuniu-article-detail__header>p{color:var(--niu-copy);line-height:1.75;margin:20px auto 0;max-width:720px}
.niuniu-article-detail__meta{color:var(--niu-copy);display:flex;font-size:13px;gap:18px;justify-content:center}
.niuniu-article-body{color:var(--niu-text);font-size:16px;line-height:1.9;overflow-wrap:anywhere}
.niuniu-article-body img,.niuniu-article-body video,.niuniu-article-body iframe{height:auto;max-width:100%}
.niuniu-article-body table{border-collapse:collapse;display:block;max-width:100%;overflow-x:auto}
.niuniu-article-body td,.niuniu-article-body th{border:1px solid var(--niu-border);padding:10px}
.niuniu-article-body pre{max-width:100%;overflow:auto}
.niuniu-article-sequence{border-top:1px solid var(--niu-border);display:grid;gap:12px;grid-template-columns:repeat(2,minmax(0,1fr));margin-top:38px;padding-top:24px}
.niuniu-article-sequence a{background:var(--niu-muted);border-radius:11px;display:grid;gap:5px;min-width:0;padding:15px}
.niuniu-article-sequence small{color:var(--niu-copy)}
.niuniu-article-sequence span{font-weight:700;overflow-wrap:anywhere}
.niuniu-theme--desktop .niuniu-footer{background:var(--niu-surface)}
@media (max-width:1199px){
  .niuniu-theme--desktop .niuniu-hero__content{left:38px}
  .niuniu-theme--desktop .niuniu-catalog-results .niuniu-product-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (max-width:991px){
  .niuniu-home-controls{align-items:stretch;flex-direction:column}
  .niuniu-search{flex-basis:auto;width:100%}
  .niuniu-catalog-layout{grid-template-columns:1fr}
  .niuniu-catalog-sidebar{position:static}
  .niuniu-theme--desktop .niuniu-hero__slide>img{opacity:.6;width:72%}
}
@media (max-width:767px){
  .niuniu-theme--desktop .niuniu-home__hero-wrap{padding-top:20px}
  .niuniu-theme--desktop .niuniu-hero,.niuniu-theme--desktop .niuniu-hero__slide{height:344px;min-height:344px}
  .niuniu-theme--desktop .niuniu-hero__content{left:26px;max-width:62%}
  .niuniu-theme--desktop .niuniu-hero__content h1,.niuniu-theme--desktop .niuniu-hero__content h2{font-size:32px}
  .niuniu-theme--desktop .niuniu-catalog-results .niuniu-product-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .niuniu-article-card{grid-template-columns:1fr}
  .niuniu-article-card__media{aspect-ratio:16/9;min-height:0}
  .niuniu-article-detail-card{padding:28px 20px}
}
@media (max-width:575px){
  .niuniu-theme--desktop .niuniu-hero__content{left:20px;max-width:78%}
  .niuniu-article-sequence{grid-template-columns:1fr}
}

/* Task 5: desktop purchase and guest lookup */
.niuniu-theme{--niu-success:#1b9c68;--niu-warning:#c77b13;--niu-danger:#d14343}
.niuniu-product-page{padding-top:34px}
.niuniu-product-service{color:var(--niu-copy);display:flex;flex-wrap:wrap;font-size:13px;gap:16px;margin:18px 0}
.niuniu-product-service span{align-items:center;display:inline-flex;gap:6px}
.niuniu-product-service i{color:var(--niu-focus);font-size:17px}
.niuniu-stock-status{background:color-mix(in srgb,var(--niu-success) 12%,var(--niu-surface));border:1px solid color-mix(in srgb,var(--niu-success) 24%,var(--niu-border));border-radius:10px;color:var(--niu-success);margin:18px 0;padding:11px 14px}
.niuniu-stock-status.is-unavailable{background:color-mix(in srgb,var(--niu-danger) 10%,var(--niu-surface));border-color:color-mix(in srgb,var(--niu-danger) 24%,var(--niu-border));color:var(--niu-danger)}
.niuniu-product-price{align-items:flex-end;border-bottom:1px solid var(--niu-border);display:flex;justify-content:space-between;margin-bottom:16px;padding:6px 0 20px}
.niuniu-product-price>span{color:var(--niu-copy);font-size:13px}
.niuniu-product-price strong{color:var(--niu-text);font-size:34px;line-height:1}
.niuniu-product-price small{font-size:15px;margin-right:3px}
.niuniu-link-button{background:transparent;border:0;color:var(--niu-focus);cursor:pointer;font-weight:700;padding:8px 0}
.niuniu-link-button:hover{text-decoration:underline}
.niuniu-button--wide{justify-content:center;margin-top:14px;width:100%}
.niuniu-button--small{font-size:12px;min-height:36px;padding:7px 11px}
.niuniu-form-message{color:var(--niu-copy);font-size:13px;line-height:1.6;margin-top:12px}
.niuniu-form-message--error{color:var(--niu-danger)}
.niuniu-field small{color:var(--niu-copy);font-size:12px;line-height:1.55}
.niuniu-product-detail-card{margin-top:34px;padding:30px}
.niuniu-product-description{line-height:1.85;overflow-wrap:anywhere;padding-top:24px}
.niuniu-product-description img,.niuniu-product-description video,.niuniu-product-description iframe{height:auto;max-width:100%}
.niuniu-product-description table{border-collapse:collapse;display:block;max-width:100%;overflow-x:auto}
.niuniu-product-description td,.niuniu-product-description th{border:1px solid var(--niu-border);padding:9px}
.niuniu-product-related{margin-top:22px;overflow:hidden;padding:26px}

.niuniu-checkout-heading{align-items:flex-end;display:flex;gap:24px;justify-content:space-between;margin-bottom:28px}
.niuniu-checkout-heading h1{font-size:clamp(32px,4vw,48px);letter-spacing:-.035em;margin-bottom:6px}
.niuniu-checkout-heading p{margin-bottom:0}
.niuniu-checkout-layout{align-items:start;display:grid;gap:28px;grid-template-columns:minmax(0,1fr) 330px}
.niuniu-checkout-main{display:grid;gap:20px}
.niuniu-checkout-card{padding:26px}
.niuniu-checkout-card>header{align-items:center;display:flex;gap:18px;justify-content:space-between}
.niuniu-checkout-card h2,.niuniu-checkout-summary h2{font-size:20px;margin-bottom:8px}
.niuniu-checkout-card>p{color:var(--niu-copy);font-size:13px;margin-bottom:0}
.niuniu-checkout-order-number{color:var(--niu-copy);font-size:12px;overflow-wrap:anywhere;text-align:right}
.niuniu-checkout-product{align-items:center;border-top:1px solid var(--niu-border);display:grid;gap:18px;grid-template-columns:96px minmax(0,1fr) auto;margin-top:18px;padding-top:20px}
.niuniu-checkout-product__media{background:var(--niu-muted);border-radius:12px;display:block;overflow:hidden}
.niuniu-checkout-product__media img{aspect-ratio:1;display:block;object-fit:cover;width:100%}
.niuniu-checkout-product__name{display:grid;gap:7px;min-width:0}
.niuniu-checkout-product__name a{font-size:16px;font-weight:750;overflow-wrap:anywhere}
.niuniu-checkout-product__name span{color:var(--niu-copy);font-size:12px}
.niuniu-checkout-product dl{display:flex;gap:22px;margin:0}
.niuniu-checkout-product dl div{display:grid;gap:4px;min-width:68px;text-align:right}
.niuniu-checkout-product dt{color:var(--niu-copy);font-size:11px}
.niuniu-checkout-product dd{font-size:14px;font-weight:750;margin:0}
.niuniu-attachment-fields{display:grid;gap:16px;grid-template-columns:repeat(2,minmax(0,1fr))}
.niuniu-balance-option{align-items:center;background:var(--niu-muted);border:1px solid var(--niu-border);border-radius:12px;cursor:pointer;display:flex;gap:12px;margin-top:20px;padding:14px 16px}
.niuniu-balance-option input{height:19px;width:19px}
.niuniu-balance-option span{display:grid;font-weight:750;gap:3px}
.niuniu-balance-option small{color:var(--niu-copy);font-weight:500}
.niuniu-balance-option:has(input:disabled){cursor:not-allowed;opacity:.62}
.niuniu-checkout-summary{padding:28px;position:sticky;top:104px}
.niuniu-checkout-summary dl{border-bottom:1px solid var(--niu-border);display:grid;gap:13px;margin:22px 0;padding-bottom:20px}
.niuniu-checkout-summary dl div{display:flex;justify-content:space-between}
.niuniu-checkout-summary dt{color:var(--niu-copy)}
.niuniu-checkout-summary dd{font-weight:700;margin:0}
.niuniu-checkout-summary__total{align-items:flex-end;display:flex;justify-content:space-between;margin-bottom:18px}
.niuniu-checkout-summary__total span{color:var(--niu-copy)}
.niuniu-checkout-summary__total strong{font-size:28px}
.niuniu-checkout-summary>small{color:var(--niu-copy);display:block;font-size:11px;line-height:1.6;margin-top:16px}

.niuniu-lookup-heading{padding-bottom:38px;padding-top:42px;text-align:center}
.niuniu-lookup-heading p{margin-left:auto;margin-right:auto;max-width:620px}
.niuniu-order-notice{align-items:flex-start;background:color-mix(in srgb,var(--niu-warning) 9%,var(--niu-surface));border-color:color-mix(in srgb,var(--niu-warning) 26%,var(--niu-border));display:flex;gap:14px;margin-bottom:22px;padding:18px 22px}
.niuniu-order-notice>i{color:var(--niu-warning);font-size:24px;margin-top:2px}
.niuniu-order-notice p{color:var(--niu-copy);font-size:13px;margin:5px 0 0}
.niuniu-order-tabs{display:flex;gap:8px;justify-content:center;margin:0 auto 18px;max-width:720px}
.niuniu-order-tabs [data-niuniu-order-tab]{min-height:44px;padding:10px 18px}
.niuniu-lookup-card{margin:0 auto 22px;max-width:920px;padding:28px}
.niuniu-lookup-card header{text-align:center}
.niuniu-lookup-card header h2{font-size:22px;margin-bottom:6px}
.niuniu-lookup-card header p{color:var(--niu-copy);font-size:13px;margin-bottom:0}
.niuniu-order-search{align-items:center;display:flex;gap:10px;margin:22px auto 0;max-width:680px}
.niuniu-order-search input:not([type="hidden"]){background:var(--niu-bg);border:1px solid var(--niu-border);border-radius:11px;color:var(--niu-text);flex:1;min-height:48px;min-width:0;padding:11px 14px}
.niuniu-order-search input:focus{border-color:var(--niu-focus);box-shadow:0 0 0 3px color-mix(in srgb,var(--niu-focus) 18%,transparent);outline:0}
.niuniu-order-search .niuniu-button{flex:none;min-height:48px}
.niuniu-order-history{display:grid;gap:9px;margin:20px auto 0;max-width:680px}
.niuniu-order-history__button{background:var(--niu-muted);border:1px solid var(--niu-border);border-radius:10px;color:var(--niu-text);cursor:pointer;font-family:inherit;font-weight:700;min-height:44px;overflow-wrap:anywhere;padding:10px 14px;text-align:left;width:100%}
.niuniu-order-history__button:hover{border-color:var(--niu-focus)}
.niuniu-order-results-section{margin-top:40px}
.niuniu-order-state{color:var(--niu-copy);padding:26px;text-align:center}
.niuniu-order-state.is-error{color:var(--niu-danger)}
.niuniu-order-state .niuniu-button{margin-left:8px}
.niuniu-order-result-list{display:grid;gap:16px}
.niuniu-order-result-card{padding:24px}
.niuniu-order-result-card>header{align-items:center;border-bottom:1px solid var(--niu-border);display:flex;gap:18px;justify-content:space-between;padding-bottom:16px}
.niuniu-order-result-card h3{font-size:17px;overflow-wrap:anywhere}
.niuniu-order-result-card__product{font-size:17px;font-weight:750;margin:18px 0;overflow-wrap:anywhere}
.niuniu-order-result-card dl{display:grid;gap:12px;grid-template-columns:repeat(5,minmax(0,1fr));margin:0}
.niuniu-order-result-card dl div{background:var(--niu-muted);border-radius:9px;display:grid;gap:4px;padding:11px}
.niuniu-order-result-card dt{color:var(--niu-copy);font-size:11px}
.niuniu-order-result-card dd{font-size:13px;font-weight:700;margin:0;overflow-wrap:anywhere}
.niuniu-order-badge{background:var(--niu-muted);border-radius:999px;color:var(--niu-copy);font-size:12px;font-weight:800;padding:7px 11px;white-space:nowrap}
.niuniu-order-badge--success{background:color-mix(in srgb,var(--niu-success) 14%,var(--niu-surface));color:var(--niu-success)}
.niuniu-order-badge--warning{background:color-mix(in srgb,var(--niu-warning) 14%,var(--niu-surface));color:var(--niu-warning)}
.niuniu-order-badge--danger{background:color-mix(in srgb,var(--niu-danger) 12%,var(--niu-surface));color:var(--niu-danger)}
.niuniu-order-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.niuniu-order-actions__note{color:var(--niu-copy);font-size:12px;padding:9px 0}
.niuniu-order-pagination{align-items:center;display:flex;gap:12px;justify-content:center;margin-top:24px}
.niuniu-order-pagination span{color:var(--niu-copy);font-size:13px}
@media (max-width:991px){
  .niuniu-checkout-layout{grid-template-columns:1fr}
  .niuniu-checkout-summary{position:static}
  .niuniu-checkout-product{grid-template-columns:82px minmax(0,1fr)}
  .niuniu-checkout-product dl{grid-column:1/-1;justify-content:space-between}
  .niuniu-order-result-card dl{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media (max-width:767px){
  .niuniu-product-page{padding-top:22px}
  .niuniu-purchase-panel h1{font-size:27px}
  .niuniu-product-detail-card,.niuniu-product-related,.niuniu-checkout-card,.niuniu-checkout-summary,.niuniu-lookup-card,.niuniu-order-result-card{padding:20px}
  .niuniu-checkout-heading{align-items:flex-start;flex-direction:column}
  .niuniu-attachment-fields{grid-template-columns:1fr}
  .niuniu-order-tabs{overflow-x:auto;justify-content:flex-start}
  .niuniu-order-search{align-items:stretch;flex-direction:column}
  .niuniu-order-result-card dl{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:479px){
  .niuniu-checkout-product{align-items:start;grid-template-columns:72px minmax(0,1fr)}
  .niuniu-checkout-product dl{display:grid;gap:10px;grid-template-columns:repeat(3,1fr)}
  .niuniu-checkout-product dl div{text-align:left}
  .niuniu-order-result-card>header{align-items:flex-start;flex-direction:column}
  .niuniu-order-result-card dl{grid-template-columns:1fr}
  .niuniu-order-pagination{align-items:stretch;flex-direction:column;text-align:center}
}

/* Task 6: mobile storefront and article pages */
.niuniu-theme--mobile .niuniu-home__hero-wrap{padding-top:16px}
.niuniu-theme--mobile .niuniu-hero{border-radius:16px;min-height:300px}
.niuniu-theme--mobile .niuniu-hero__slide{display:none;min-height:300px;padding:26px 22px 48px}
.niuniu-theme--mobile .niuniu-hero__slide.is-active{display:flex}
.niuniu-theme--mobile .niuniu-hero__content{max-width:78%}
.niuniu-theme--mobile .niuniu-hero__content h1,.niuniu-theme--mobile .niuniu-hero__content h2{font-size:29px;letter-spacing:-.035em;margin-bottom:12px}
.niuniu-theme--mobile .niuniu-hero__content p{font-size:14px;line-height:1.6;margin-bottom:0}
.niuniu-theme--mobile .niuniu-hero__actions{margin-top:18px}
.niuniu-theme--mobile .niuniu-hero__controls{bottom:12px}
.niuniu-theme--mobile .niuniu-hero__arrow{height:34px;width:34px}
.niuniu-theme--mobile .niuniu-section{padding:34px 0}
.niuniu-theme--mobile .niuniu-section-heading{margin-bottom:18px}
.niuniu-theme--mobile .niuniu-section-heading h1,.niuniu-theme--mobile .niuniu-section-heading h2{font-size:25px}
.niuniu-theme--mobile .niuniu-home-controls{align-items:stretch;display:grid;gap:16px;margin-bottom:20px}
.niuniu-theme--mobile .niuniu-category-pills{display:flex;flex-wrap:wrap;gap:9px}
.niuniu-theme--mobile .niuniu-category-pills [data-niuniu-category-tab]{line-height:1.35;min-height:40px;padding:8px 14px;white-space:normal}
.niuniu-theme--mobile .niuniu-search{flex-basis:auto;min-height:44px;width:100%}
.niuniu-theme--mobile .niuniu-product-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.niuniu-theme--mobile .niuniu-product-card{border-radius:14px}
.niuniu-theme--mobile .niuniu-product-card__image{aspect-ratio:1/1;width:100%;object-fit:cover}
.niuniu-theme--mobile .niuniu-product-card__body{padding:12px}
.niuniu-theme--mobile .niuniu-product-card__body h2,.niuniu-theme--mobile .niuniu-product-card__body h3{font-size:14px;min-height:41px}
.niuniu-theme--mobile .niuniu-product-card__meta{align-items:center;flex-direction:column-reverse;gap:4px;justify-content:center;text-align:center}
.niuniu-theme--mobile .niuniu-product-card__meta strong{align-self:center;font-size:16px}
.niuniu-theme--mobile .niuniu-product-card__meta span{align-self:center;font-size:11px}
.niuniu-theme--mobile .niuniu-page-heading{padding:28px 0}
.niuniu-theme--mobile .niuniu-page-heading h1{font-size:30px;margin:10px 0 7px;overflow-wrap:anywhere}
.niuniu-theme--mobile .niuniu-breadcrumb{margin-bottom:14px}
.niuniu-theme--mobile .niuniu-mobile-catalog-search{align-items:stretch;display:flex;gap:9px;margin-bottom:18px}
.niuniu-theme--mobile .niuniu-mobile-catalog-search input{background:var(--niu-surface);border:1px solid var(--niu-border);border-radius:11px;color:var(--niu-text);min-height:44px;min-width:0;padding:10px 13px;width:100%}
.niuniu-theme--mobile .niuniu-mobile-catalog-search input:focus{border-color:var(--niu-focus);box-shadow:0 0 0 3px color-mix(in srgb,var(--niu-focus) 17%,transparent);outline:0}
.niuniu-theme--mobile .niuniu-mobile-category-links{margin-bottom:14px}
.niuniu-theme--mobile .niuniu-mobile-category-links--child{border-top:1px solid var(--niu-border);padding-top:14px}
.niuniu-theme--mobile .niuniu-category-link{background:var(--niu-muted);border:1px solid transparent;border-radius:999px;color:var(--niu-copy);font-size:13px;font-weight:650;line-height:1.35;min-height:40px;overflow-wrap:anywhere;padding:10px 14px}
.niuniu-theme--mobile .niuniu-category-link.is-active{background:var(--niu-action);border-color:var(--niu-action);color:var(--niu-bg)}
.niuniu-theme--mobile .niuniu-catalog-toolbar{align-items:end;display:grid;grid-template-columns:minmax(0,1fr) auto;margin-bottom:18px}
.niuniu-theme--mobile .niuniu-catalog-toolbar>div{margin-right:0}
.niuniu-theme--mobile .niuniu-catalog-toolbar label{display:none}
.niuniu-theme--mobile .niuniu-catalog-toolbar select{max-width:145px;width:100%}
.niuniu-theme--mobile .niuniu-catalog-pagination,.niuniu-theme--mobile .niuniu-pagination{flex-wrap:wrap;margin-top:22px}
.niuniu-theme--mobile .niuniu-article-heading{padding-bottom:24px}
.niuniu-theme--mobile .niuniu-article-categories{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.niuniu-theme--mobile .niuniu-article-category{font-size:12px;line-height:1.35;min-height:38px;padding:8px 12px;white-space:normal}
.niuniu-theme--mobile a.niuniu-article-category{align-items:center;display:inline-flex}
.niuniu-theme--mobile .niuniu-article-list{gap:14px}
.niuniu-theme--mobile .niuniu-article-card{display:grid;grid-template-columns:1fr;min-height:0}
.niuniu-theme--mobile .niuniu-article-card__media{aspect-ratio:16/9;min-height:0}
.niuniu-theme--mobile .niuniu-article-card__body{padding:18px}
.niuniu-theme--mobile .niuniu-article-card__body h2{font-size:18px;overflow-wrap:anywhere}
.niuniu-theme--mobile .niuniu-article-card__body p{font-size:13px;margin-bottom:13px}
.niuniu-theme--mobile .niuniu-article-card__meta{flex-wrap:wrap;gap:8px 16px}
.niuniu-theme--mobile .niuniu-pagination-error{margin-top:14px}
.niuniu-theme--mobile .niuniu-mobile-article-categories{margin-bottom:16px;margin-top:0}
.niuniu-theme--mobile .niuniu-article-detail-card{padding:22px 18px}
.niuniu-theme--mobile .niuniu-article-detail__header{margin-bottom:24px;padding-bottom:22px;text-align:left}
.niuniu-theme--mobile .niuniu-article-detail__header h1{font-size:27px;letter-spacing:-.025em;margin-bottom:14px;overflow-wrap:anywhere}
.niuniu-theme--mobile .niuniu-article-detail__header>p{font-size:13px;margin-top:14px}
.niuniu-theme--mobile .niuniu-article-detail__meta{flex-wrap:wrap;font-size:12px;gap:8px 14px;justify-content:flex-start}
.niuniu-theme--mobile .niuniu-article-body{font-size:15px;line-height:1.8;min-width:0;overflow-wrap:anywhere}
.niuniu-theme--mobile .niuniu-article-body img{height:auto;max-width:100%}
.niuniu-theme--mobile .niuniu-article-body table{display:block;max-width:100%;overflow-x:auto}
.niuniu-theme--mobile .niuniu-article-sequence{grid-template-columns:1fr;margin-top:28px;padding-top:20px}
@media(max-width:329px){.niuniu-theme--mobile .niuniu-product-grid{grid-template-columns:1fr}.niuniu-theme--mobile .niuniu-mobile-catalog-search{display:grid}.niuniu-theme--mobile .niuniu-catalog-toolbar{grid-template-columns:1fr}.niuniu-theme--mobile .niuniu-catalog-toolbar select{max-width:none}}

/* Task 7: mobile purchase, checkout and guest lookup */
.niuniu-theme--mobile .niuniu-mobile-purchase,.niuniu-theme--mobile .niuniu-mobile-checkout-card{display:grid;gap:16px;margin-bottom:16px;padding:18px}
.niuniu-theme--mobile .niuniu-mobile-purchase__image{aspect-ratio:1/1;border-radius:12px;object-fit:cover;width:100%}
.niuniu-theme--mobile .niuniu-mobile-purchase__copy h1{font-size:24px;margin:6px 0}
.niuniu-theme--mobile .niuniu-mobile-purchase__price{color:var(--niu-action);font-size:24px}
.niuniu-theme--mobile .niuniu-mobile-purchase__quantity{border-top:1px solid var(--niu-border);padding-top:16px}
.niuniu-theme--mobile .niuniu-mobile-purchase__description{margin-top:16px;padding:18px}
.niuniu-theme--mobile .niuniu-mobile-checkout-product{align-items:center;display:grid;gap:12px;grid-template-columns:70px minmax(0,1fr) auto}
.niuniu-theme--mobile .niuniu-mobile-checkout-product img{border-radius:10px;height:70px;object-fit:cover;width:70px}
.niuniu-theme--mobile .niuniu-mobile-checkout-product div{display:grid;gap:4px;min-width:0}
.niuniu-theme--mobile .niuniu-mobile-checkout-product strong{overflow-wrap:anywhere}
.niuniu-theme--mobile .niuniu-mobile-checkout-total>div{align-items:center;display:flex;justify-content:space-between}
.niuniu-theme--mobile .niuniu-mobile-checkout-total strong{color:var(--niu-action);font-size:24px}
.niuniu-theme--mobile .niuniu-mobile-lookup-heading{margin-bottom:18px}
.niuniu-theme--mobile .niuniu-mobile-order-results{margin-top:22px}
.niuniu-theme--mobile .niuniu-mobile-order-results h2{font-size:21px}
@media(max-width:359px){.niuniu-theme--mobile .niuniu-mobile-checkout-product{grid-template-columns:58px minmax(0,1fr)}.niuniu-theme--mobile .niuniu-mobile-checkout-product img{height:58px;width:58px}.niuniu-theme--mobile .niuniu-mobile-checkout-product b{grid-column:1/-1}}

/* Task 9: paired visual QA alignment with the approved source layout */
.niuniu-alert .niuniu-container{justify-content:center;min-height:39px}
.niuniu-theme--desktop .niuniu-header__row{min-height:64px}
.niuniu-theme--desktop .niuniu-brand span{font-size:24px;font-weight:600;max-width:376px}
.niuniu-theme--desktop .niuniu-home__hero-wrap{padding-top:24px}
.niuniu-theme--desktop .niuniu-hero,.niuniu-theme--desktop .niuniu-hero__slide{height:344px;min-height:344px}
.niuniu-theme--desktop .niuniu-hero__content{left:104px}
.niuniu-theme--desktop .niuniu-hero__content h1{font-size:clamp(22px,3.6vw,56px);max-width:none;white-space:nowrap}
.niuniu-theme--desktop .niuniu-hero__content h2{font-size:clamp(22px,3.2vw,50px);max-width:none;white-space:nowrap}
.niuniu-theme--desktop .niuniu-header__search{background:transparent;border-color:transparent;flex:0 0 42px;justify-content:flex-end;max-width:42px;min-height:42px;transition:background .18s ease,border-color .18s ease,max-width .18s ease,width .18s ease;width:42px}
.niuniu-theme--desktop .niuniu-header__search input{opacity:0;padding-left:0;padding-right:0;transition:opacity .18s ease;width:0}
.niuniu-theme--desktop .niuniu-header__search.is-open{background:var(--niu-muted);border-color:transparent;max-width:230px;width:18vw}
.niuniu-theme--desktop .niuniu-header__search.is-open input{opacity:1;padding-left:14px;width:100%}
.niuniu-theme--mobile .niuniu-header__row{min-height:64px}
.niuniu-theme--mobile .niuniu-brand img{display:none}
.niuniu-theme--mobile .niuniu-brand span{font-size:24px;font-weight:600;max-width:calc(100vw - 188px)}
.niuniu-theme--mobile .niuniu-mobile-search{display:none;margin:0 auto 10px;max-width:calc(100% - 24px)}
.niuniu-theme--mobile .niuniu-mobile-search.is-open{display:flex}
.niuniu-theme--mobile .niuniu-home__hero-wrap{padding-top:24px}
.niuniu-theme--mobile .niuniu-container.niuniu-home__hero-wrap{padding:18px 16px 0}
.niuniu-home .niuniu-catalog>.niuniu-container{margin-left:auto;margin-right:auto}
.niuniu-home .niuniu-section-heading{align-items:center;justify-content:center;text-align:center}
.niuniu-home .niuniu-catalog-toolbar>.niuniu-category-tabs{display:flex;flex-wrap:wrap;justify-content:center;margin-bottom:0;overflow-x:auto}
.niuniu-home .niuniu-category-tabs [data-niuniu-category-tab],.niuniu-home .niuniu-category-pills [data-niuniu-category-tab]{flex:0 0 auto;white-space:nowrap}
.niuniu-theme--mobile .niuniu-home .niuniu-category-tabs,.niuniu-theme--mobile .niuniu-home .niuniu-category-pills{display:flex;flex-wrap:nowrap;justify-content:flex-start;overflow-x:auto;scrollbar-width:none}
.niuniu-theme--mobile .niuniu-home .niuniu-category-tabs::-webkit-scrollbar,.niuniu-theme--mobile .niuniu-home .niuniu-category-pills::-webkit-scrollbar{display:none}
.niuniu-theme--mobile .niuniu-hero,.niuniu-theme--mobile .niuniu-hero__slide{min-height:215px}
.niuniu-theme--mobile .niuniu-hero__slide{align-items:flex-start;background-position:center bottom;background-repeat:no-repeat;background-size:100% auto;padding:20px 18px 72px}
.niuniu-theme--mobile .niuniu-hero__content{margin:0 auto;max-width:100%;text-align:center}
.niuniu-theme--mobile .niuniu-hero__content h1,.niuniu-theme--mobile .niuniu-hero__content h2{font-size:26px;margin-bottom:8px}
.niuniu-theme--mobile .niuniu-hero__content p{font-size:12px;line-height:1.45}
.niuniu-theme--mobile .niuniu-hero__content .niuniu-button{min-height:36px;padding:8px 15px}
.niuniu-theme--mobile .niuniu-hero__actions{margin-top:10px}
.niuniu-theme--mobile .niuniu-hero__actions{justify-content:center}
.niuniu-theme--mobile .niuniu-hero__controls{bottom:8px}

.niuniu-search button{align-items:center;background:transparent;border:0;color:var(--niu-copy);cursor:pointer;display:flex;font-size:18px;justify-content:center;padding:10px}
.niuniu-theme--mobile .niuniu-search button{align-self:stretch;flex:0 0 48px;padding:0}
.niuniu-home-controls{align-items:center;flex-wrap:wrap}.niuniu-home-controls .niuniu-category-pills{flex:1 0 100%}.niuniu-home-controls .niuniu-search{flex-basis:840px;max-width:100%;margin:0 auto}.niuniu-catalog .niuniu-product-card__meta{justify-content:center;margin-top:12px}.niuniu-catalog .niuniu-product-card__meta strong{color:#ef4444;font-size:20px;text-align:center}
.niuniu-back-to-top{align-items:center;background:#cbd5e1;border:0;border-radius:50%;bottom:28px;box-shadow:0 12px 30px rgba(15,23,42,.22);color:#fff;cursor:pointer;display:flex;height:46px;justify-content:center;opacity:0;pointer-events:none;position:fixed;right:28px;transform:translateY(12px);transition:.2s;visibility:hidden;width:46px;z-index:90}.niuniu-back-to-top.is-visible{opacity:1;pointer-events:auto;transform:none;visibility:visible}
@media(max-width:720px){.niuniu-back-to-top{bottom:88px;right:16px}.niuniu-home-controls .niuniu-search{flex-basis:100%}}
.niuniu-pay-option>span{display:flex;flex-direction:column;font-size:13px;text-align:left}.niuniu-pay-option small{color:var(--niu-copy);font-size:10px;margin-top:4px}.niuniu-pay-logo{align-items:center;background:#334155;border-radius:50%;color:#fff;display:flex;flex:0 0 32px;font-size:12px;font-style:normal;font-weight:800;height:32px;justify-content:center}.niuniu-pay-logo--usdt{background:#26a17b}.niuniu-pay-logo--paypal{background:#003087}.niuniu-pay-logo--coinbase{background:#1652f0}.niuniu-pay-logo--perfect{background:#d71920}
.niuniu-pay-logo-image{height:38px;max-width:76px;object-fit:contain;width:auto}.niuniu-pay-option>span{font-size:14px}
.niuniu-search input:focus-visible,.niuniu-search button:focus-visible{outline:none}
.niuniu-button--telegram i{font-size:18px}.niuniu-stock-dialog__body p{color:var(--niu-text);font-size:17px;font-weight:650;margin-bottom:18px}.niuniu-stock-dialog__actions{display:flex;flex-wrap:wrap;gap:12px}.niuniu-category-pills [data-niuniu-category-level="2"]{font-size:13px;margin-left:2px;padding-left:14px;padding-right:14px}
.niuniu-footer--mobile{padding-top:32px}
.niuniu-mobile-footer-content{display:grid;gap:24px}
.niuniu-mobile-footer-help nav{display:grid;gap:12px 18px;grid-template-columns:repeat(3,minmax(0,1fr))}
.niuniu-mobile-footer-help nav a{overflow-wrap:anywhere}
.niuniu-mobile-category-directory{display:grid;gap:10px;margin:16px 0 20px}
.niuniu-mobile-category-group{background:var(--niu-muted);border:1px solid var(--niu-border);border-radius:14px;padding:12px}
.niuniu-mobile-category-children{border-left:2px solid var(--niu-border);display:grid!important;gap:10px!important;grid-template-columns:1fr;margin:18px 0 0 12px!important;padding-left:18px}
.niuniu-mobile-category-children a{background:transparent!important;border-radius:8px!important;display:block;font-size:13px!important;padding:9px 10px!important;width:100%}
.niuniu-footer--mobile .niuniu-footer__social{margin-top:0}