/* =============================================================================
   main.css —— optical.精密注塑模具.中国 全新设计
   风格：高端科技风 · 深空靛蓝 + 光学青 · 玻璃质感 · 移动端硬规则内置
   ============================================================================= */
:root{
  --c-primary:#4f46e5;
  --c-primary-dark:#4338ca;
  --c-accent:#22d3ee;
  --c-ink:#0b1020;
  --c-text:#334155;
  --c-muted:#64748b;
  --c-line:#e6e8f0;
  --c-bg:#ffffff;
  --c-bg-soft:#f6f7fb;
  --c-bg-tint:#eef2ff;
  --c-dark:#0b1020;
  --c-dark-2:#11152b;
  --radius:16px;
  --shadow:0 1px 2px rgba(11,16,32,.05),0 10px 30px rgba(11,16,32,.08);
  --container:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,sans-serif;color:var(--c-text);background:var(--c-bg);line-height:1.78;font-size:16px;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{color:var(--c-ink);line-height:1.35;font-weight:700}
a{color:var(--c-primary);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
ul,ol{list-style-position:inside}
.container{max-width:var(--container);margin:0 auto;padding:0 24px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--c-primary);color:#fff;padding:8px 16px;z-index:200}
.skip-link:focus{left:12px;top:12px}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.88);backdrop-filter:blur(12px);border-bottom:1px solid var(--c-line)}
.header-inner{display:flex;align-items:center;gap:28px;height:70px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none!important}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(135deg,var(--c-primary),var(--c-accent));color:#fff;display:flex;align-items:center;justify-content:center;flex:none;box-shadow:0 6px 16px rgba(79,70,229,.35)}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-text strong{color:var(--c-ink);font-size:17px;letter-spacing:.01em}
.brand-text small{color:var(--c-muted);font-size:11px;letter-spacing:.04em}
.site-nav{margin-left:auto}
.site-nav ul{display:flex;gap:4px;list-style:none}
.site-nav a{display:block;padding:9px 15px;border-radius:9px;color:var(--c-text);font-size:15px;font-weight:500}
.site-nav a:hover{background:var(--c-bg-tint);color:var(--c-primary);text-decoration:none}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--c-line);border-radius:9px;width:44px;height:40px;cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-ink);border-radius:2px;transition:.2s}

/* ---------- Hero ---------- */
.hero{position:relative;background:radial-gradient(1200px 600px at 80% -10%,rgba(34,211,238,.18),transparent),linear-gradient(160deg,#0b1020 0%,#11152b 60%,#1b1247 100%);color:#e2e8f0;overflow:hidden;border-bottom:1px solid rgba(255,255,255,.06)}
.hero-mesh{position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);background-size:26px 26px;mask-image:linear-gradient(180deg,#000,transparent 75%);opacity:.6}
.hero-inner{position:relative;z-index:1;padding:92px 24px 86px;max-width:var(--container);margin:0 auto}
.hero-eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--c-accent);background:rgba(34,211,238,.12);padding:6px 15px;border-radius:999px;margin-bottom:22px}
.hero h1{color:#fff;font-size:42px;letter-spacing:.01em;margin-bottom:18px;overflow-wrap:anywhere;background:linear-gradient(180deg,#fff,#c7d2fe);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-sub{font-size:18px;color:#cbd5e1;max-width:780px;margin-bottom:24px}
.hero-points{list-style:none;display:flex;flex-direction:column;gap:10px;margin-bottom:34px}
.hero-points li{position:relative;padding-left:26px;color:#e2e8f0;font-size:15px}
.hero-points li::before{content:"";position:absolute;left:2px;top:9px;width:9px;height:9px;border-radius:3px;background:var(--c-accent);transform:rotate(45deg);box-shadow:0 0 12px rgba(34,211,238,.6)}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 28px;border-radius:11px;font-size:15px;font-weight:600;text-decoration:none!important;transition:.2s;border:1px solid transparent}
.btn-primary{background:linear-gradient(135deg,var(--c-primary),#6366f1);color:#fff!important;box-shadow:0 8px 22px rgba(79,70,229,.4)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 12px 28px rgba(79,70,229,.5)}
.btn-ghost{border-color:rgba(255,255,255,.35);color:#e2e8f0!important;background:rgba(255,255,255,.04)}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:var(--c-accent)}

/* ---------- Sections ---------- */
.section{padding:66px 0}
.section:nth-of-type(even){background:var(--c-bg-soft)}
.section-title{font-size:27px;text-align:center;margin-bottom:14px;position:relative;padding-bottom:15px}
.section-title::after{content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);width:46px;height:3px;border-radius:2px;background:linear-gradient(90deg,var(--c-primary),var(--c-accent))}
.section-lead{text-align:center;color:var(--c-muted);max-width:680px;margin:0 auto 32px;font-size:15px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}

.cap-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);padding:28px 24px;box-shadow:var(--shadow);transition:.25s}
.cap-card:hover{transform:translateY(-4px);border-color:var(--c-primary)}
.cap-ico{width:46px;height:46px;border-radius:12px;background:var(--c-bg-tint);color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:700;margin-bottom:14px}
.cap-card h3{font-size:18px;margin-bottom:8px}
.cap-card p{font-size:14px;color:var(--c-muted);line-height:1.7}

.line-card{display:block;background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);padding:30px 26px;box-shadow:var(--shadow);color:inherit;transition:.25s;text-decoration:none!important;position:relative;overflow:hidden}
.line-card::before{content:"";position:absolute;right:-40px;top:-40px;width:120px;height:120px;border-radius:50%;background:radial-gradient(closest-side,rgba(79,70,229,.12),transparent)}
.line-card:hover{transform:translateY(-4px);border-color:var(--c-primary);box-shadow:0 14px 30px rgba(79,70,229,.16)}
.line-tag{font-size:12px;font-weight:700;color:var(--c-primary);letter-spacing:.12em}
.line-card h3{font-size:19px;margin:8px 0 10px}
.line-card p{font-size:14px;color:var(--c-muted);margin-bottom:14px;line-height:1.7}
.line-more{font-size:13px;font-weight:600;color:var(--c-primary)}

.post-card{display:block;background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);color:inherit;text-decoration:none!important;transition:.25s}
.post-card:hover{transform:translateY(-4px);border-color:var(--c-primary)}
.post-cat{display:inline-block;font-size:12px;font-weight:600;color:var(--c-primary);background:var(--c-bg-tint);border-radius:999px;padding:3px 13px;margin-bottom:10px}
.post-card h3{font-size:18px;margin-bottom:8px;color:var(--c-ink)}
.post-card p{font-size:14px;color:var(--c-muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;line-height:1.7}
.section-more{text-align:center;margin-top:32px}

/* CTA band */
.section-cta{background:radial-gradient(900px 400px at 50% -20%,rgba(34,211,238,.18),transparent),linear-gradient(150deg,#11152b,#1b1247);color:#e2e8f0}
.cta-inner{text-align:center;max-width:760px;margin:0 auto}
.section-cta h2{color:#fff;font-size:28px;margin-bottom:14px}
.cta-inner p{color:#cbd5e1;margin-bottom:26px;font-size:16px}

/* ---------- 列表页（左分类 + 右内容）---------- */
.list-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:40px;padding:44px 24px;max-width:var(--container);margin:0 auto}
.detail-layout{display:grid;grid-template-columns:240px minmax(0,1fr);gap:40px;padding:40px 24px;max-width:var(--container);margin:0 auto}
.cat-side{align-self:start;position:sticky;top:92px;background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);padding:20px 14px}
.cat-side-title{font-size:14px;font-weight:700;color:var(--c-ink);padding:0 10px 12px;border-bottom:1px solid var(--c-line);margin-bottom:10px}
/* 分类抽屉按钮：桌面端隐藏，移动端显示并折叠分类列表 */
.cat-toggle{display:none;width:100%;align-items:center;justify-content:space-between;gap:10px;background:none;border:none;font-family:inherit;font-size:15px;font-weight:700;color:var(--c-ink);cursor:pointer;text-align:left;padding:0}
.cat-arrow{display:flex;color:var(--c-muted);transition:transform .2s}
.cat-side.open .cat-arrow{transform:rotate(180deg)}
ul.category-list{list-style:none}
.category-list a{display:block;padding:9px 12px;border-radius:8px;color:var(--c-text);font-size:15px}
.category-list a:hover{background:var(--c-bg-tint);color:var(--c-primary);text-decoration:none}
.category-list a.active{background:var(--c-primary);color:#fff;font-weight:600}
.cat-content{min-width:0}
.list-title{font-size:30px;margin-bottom:10px;overflow-wrap:anywhere;color:var(--c-ink)}
.list-intro{color:var(--c-muted);margin-bottom:22px}
ul.post-list{list-style:none;display:flex;flex-direction:column;gap:18px}
.post-item{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);transition:.2s}
.post-item:hover{border-color:var(--c-primary);box-shadow:var(--shadow)}
.post-item a{display:block;padding:24px;color:inherit;text-decoration:none!important}
.post-item h2{font-size:19px;margin:8px 0;color:var(--c-ink)}
.post-item p{font-size:14px;color:var(--c-muted);line-height:1.7}

/* ---------- 详情页（正文 + 悬浮 TOC）---------- */
.detail-main{min-width:0;background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);padding:40px 48px}
.toc-aside{position:sticky;top:92px;align-self:start;max-height:calc(100vh - 110px);overflow-y:auto;background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);padding:18px 14px}
.toc-title{font-size:14px;font-weight:700;color:var(--c-ink);padding:0 8px 10px;border-bottom:1px solid var(--c-line);margin-bottom:8px}
.toc-aside ul{list-style:none}
.toc-aside a{display:block;padding:7px 8px;font-size:14px;color:var(--c-muted);border-radius:6px;border-left:2px solid transparent}
.toc-aside a:hover,.toc-aside a.active{color:var(--c-primary);border-left-color:var(--c-primary);background:var(--c-bg-tint);text-decoration:none}
.detail-head{margin-bottom:24px}
.article-title{font-size:30px;margin:12px 0 14px;overflow-wrap:anywhere;color:var(--c-ink)}
.detail-meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;color:var(--c-muted);font-size:13px}
.tag-text{display:inline-block;font-size:12px;font-weight:600;color:var(--c-primary);background:var(--c-bg-tint);border-radius:999px;padding:3px 13px}

/* 正文 */
.article-body{font-size:16px;color:#1e293b;line-height:1.85}
.article-body h2{font-size:22px;margin:34px 0 14px;padding-left:13px;border-left:4px solid var(--c-primary);overflow-wrap:anywhere;color:var(--c-ink)}
.article-body h3{font-size:18px;margin:24px 0 10px;color:var(--c-ink)}
.article-body p{margin:0 0 14px;max-width:100%}
.article-body ul,.article-body ol{margin:0 0 14px 22px}
.article-body li{margin-bottom:6px}
.article-body blockquote{margin:16px 0;padding:14px 18px;background:var(--c-bg-tint);border-left:4px solid var(--c-primary);border-radius:0 10px 10px 0;font-size:15px;color:#334155}
.article-body blockquote p{margin-bottom:6px}
.article-body .table-wrap{margin:16px 0}
.article-body strong{color:var(--c-ink)}
.case-callout{background:linear-gradient(135deg,#eef2ff,#ecfeff);border:1px solid #c7d2fe;border-radius:10px;padding:16px 20px;margin-bottom:20px}
.case-callout strong{color:var(--c-primary-dark)}
.case-callout p{font-size:14px;color:var(--c-text);margin-top:6px;line-height:1.7}
.summary-callout{background:#f8fafc;border-left:3px solid var(--c-accent);border-radius:8px;padding:14px 18px;margin-bottom:18px}
.summary-callout strong{color:var(--c-primary-dark);margin-right:6px}
.summary-callout p{font-size:15px;color:var(--c-text);margin:6px 0 0;line-height:1.75}
.author-byline{font-size:13px;color:var(--c-muted);margin:0 0 18px;padding-bottom:14px;border-bottom:1px dashed var(--c-line)}
.author-byline a{color:var(--c-primary);text-decoration:none}

/* 表格 */
.table-wrap{overflow-x:auto;border-radius:var(--radius);border:1px solid var(--c-line);background:#fff}
table.data{width:100%;border-collapse:collapse;font-size:14px;min-width:760px}
table.data th{background:linear-gradient(135deg,var(--c-primary),#6366f1);color:#fff;text-align:left;padding:12px 16px;font-weight:600;white-space:nowrap}
table.data td{padding:12px 16px;border-top:1px solid var(--c-line);vertical-align:top;line-height:1.7}
table.data tbody tr:nth-child(even){background:var(--c-bg-soft)}
.table-note{margin-top:12px;font-size:13px;color:var(--c-muted);text-align:center}

/* 文章原始 HTML 块：参数卡 / 工况速查 / 误区表 */
.spec-card{background:#fff;border:1px solid var(--c-line);border-radius:12px;padding:18px 20px;margin:18px 0;box-shadow:var(--shadow)}
.spec-card h4{font-size:16px;margin:0 0 12px;color:var(--c-ink);padding-left:10px;border-left:3px solid var(--c-accent);line-height:1.4}
table.spec-table{width:100%;border-collapse:collapse;font-size:14px}
table.spec-table th{width:38%;text-align:left;padding:8px 12px;background:var(--c-bg-soft);color:var(--c-ink);border:1px solid var(--c-line);font-weight:600;vertical-align:top}
table.spec-table td{padding:8px 12px;border:1px solid var(--c-line);line-height:1.7;vertical-align:top}
ul.spec-list{list-style:none;margin:0;padding:0}
ul.spec-list li{position:relative;padding:7px 0 7px 20px;font-size:14px;line-height:1.7;border-bottom:1px dashed var(--c-line)}
ul.spec-list li:last-child{border-bottom:none}
ul.spec-list li::before{content:"";position:absolute;left:4px;top:15px;width:7px;height:7px;border-radius:2px;background:var(--c-primary);transform:rotate(45deg)}
.nonstd{color:var(--c-muted);font-size:12px}

/* FAQ（裸 details） */
.faq-section{margin-top:36px}
.faq-section h2{font-size:22px;margin-bottom:16px;color:var(--c-ink)}
.faq-section details{border:1px solid var(--c-line);border-radius:10px;margin-bottom:10px;background:#fff}
.faq-section summary{cursor:pointer;padding:14px 18px;font-weight:600;color:var(--c-ink);font-size:15px;list-style:none;position:relative;padding-right:40px}
.faq-section summary::-webkit-details-marker{display:none}
.faq-section summary::after{content:"+";position:absolute;right:18px;top:50%;transform:translateY(-50%);font-size:20px;color:var(--c-primary);font-weight:400}
.faq-section details[open] summary::after{content:"−"}
.faq-section .faq-a{padding:0 18px 14px;font-size:14px;color:var(--c-text);line-height:1.8}

/* 相关阅读 */
.related{margin-top:32px;border-top:1px solid var(--c-line);padding-top:24px}
.related h2{font-size:20px;margin-bottom:14px;color:var(--c-ink)}
.related ul{list-style:none}
.related li{padding:9px 0;border-bottom:1px dashed var(--c-line);font-size:15px}
.related-why{color:var(--c-muted);font-size:13px;margin-left:6px}

/* ---------- 页面（about 等）---------- */
.page-layout{max-width:960px;padding:8px 0 60px;margin:0 auto}
.page-main{padding:40px 48px;background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);margin-top:24px}
.page-title{font-size:30px;margin:14px 0 18px;overflow-wrap:anywhere;color:var(--c-ink)}

/* 面包屑 */
.breadcrumb{font-size:13px;color:var(--c-muted);margin-bottom:14px}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:4px;align-items:center}
.breadcrumb a{color:var(--c-muted)}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{margin:0 4px;color:var(--c-line)}

/* 归档 / 404 */
.archive-group{margin-bottom:28px}
.archive-group h2{font-size:20px;margin-bottom:12px;color:var(--c-ink)}
.archive-list{list-style:none}
.archive-list li{padding:9px 0;border-bottom:1px dashed var(--c-line);display:flex;gap:12px;align-items:center}
.notfound{text-align:center;padding:90px 24px}
.notfound h1{font-size:34px;margin-bottom:14px;color:var(--c-ink)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-dark);color:#94a3b8;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding:54px 24px 40px}
.footer-col strong{display:block;color:#e2e8f0;font-size:15px;margin-bottom:14px}
.footer-col ul{list-style:none}
.footer-col a{color:#94a3b8;font-size:14px;display:inline-block;padding:4px 0}
.footer-col a:hover{color:var(--c-accent)}
.footer-brand p{font-size:13px;line-height:1.85;margin-top:10px;color:#94a3b8}
.footer-bottom{border-top:1px solid rgba(148,163,184,.18);padding:18px 0;font-size:13px;text-align:center;color:#64748b}

/* ---------- 右侧中间胶囊（企业微信 + 回顶部）---------- */
.float-rail{position:fixed;right:16px;top:50%;transform:translateY(-50%);z-index:120;display:flex;flex-direction:column;gap:12px}
.float-capsule{display:flex;flex-direction:column;align-items:center;gap:4px;width:64px;padding:12px 4px;background:#fff;border:1px solid var(--c-line);border-radius:999px;box-shadow:0 6px 22px rgba(11,16,32,.16);cursor:pointer;color:var(--c-primary);transition:.2s;font-family:inherit}
.float-capsule:hover{background:linear-gradient(135deg,var(--c-primary),#6366f1);color:#fff;border-color:transparent;transform:translateX(-2px)}
.float-icon{display:flex}
.float-text{font-size:12px;font-weight:600;line-height:1.2}
#backTopBtn[hidden]{display:none}

/* ---------- 企业微信名片弹层 ---------- */
.wechat-modal-overlay{position:fixed;inset:0;z-index:300;background:rgba(11,16,32,.66);display:flex;align-items:center;justify-content:center;padding:20px}
.wechat-modal-overlay[hidden]{display:none}
.wechat-modal{position:relative;background:#fff;border-radius:16px;padding:14px;box-shadow:0 24px 64px rgba(0,0,0,.4);max-width:calc(100vw - 40px)}
.wechat-modal-img{display:block;width:300px;height:500px;max-width:none;object-fit:contain;background:#fff;border-radius:10px}
.wechat-modal-close{position:absolute;top:-14px;right:-14px;width:34px;height:34px;border-radius:50%;border:none;background:var(--c-ink);color:#fff;font-size:20px;cursor:pointer;line-height:1}
.wechat-modal-tip{text-align:center;font-size:13px;color:var(--c-muted);padding-top:10px;margin:0}
body.modal-open{overflow:hidden}

/* 联系页内嵌名片 */
.wechat-card-embed{display:flex;flex-direction:column;align-items:center;padding:18px 0 6px}
.wechat-card-embed button{background:none;border:none;cursor:pointer;padding:0;border-radius:16px}
.wechat-card-embed img{width:300px;height:500px;object-fit:contain;border-radius:16px;border:1px solid var(--c-line);box-shadow:var(--shadow);transition:.2s}
.wechat-card-embed button:hover img{transform:scale(1.02);border-color:var(--c-primary);box-shadow:0 16px 36px rgba(79,70,229,.2)}

/* ---------- 分页 ---------- */
.pagination ul{list-style:none;display:flex;gap:8px;justify-content:center;margin:28px 0 0}
.pagination a,.pg-current,.pg-ellipsis{display:inline-block;min-width:36px;padding:7px 12px;text-align:center;border-radius:8px;border:1px solid var(--c-line);font-size:14px;background:#fff}
.pagination a:hover{border-color:var(--c-primary);color:var(--c-primary);text-decoration:none}
.pg-current{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}

/* =============================================================================
   响应式（移动端硬规则）
   ============================================================================= */
@media (max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .detail-layout{grid-template-columns:1fr;gap:20px}
  .toc-aside{position:static;max-height:none}
  .list-layout{grid-template-columns:1fr;gap:20px}
  .cat-side{position:static;padding:0;border:none;background:none;box-shadow:none}
  .cat-side-title{display:none}
  .cat-toggle{display:flex;background:#fff;border:1px solid var(--c-line);border-radius:12px;padding:14px 18px;margin-bottom:16px;box-shadow:var(--shadow)}
  .cat-toggle:active{border-color:var(--c-primary);color:var(--c-primary)}
  .cat-side-body{display:none}
  .cat-side.open .cat-side-body{display:block;background:#fff;border:1px solid var(--c-line);border-radius:12px;padding:12px;margin-bottom:16px;box-shadow:var(--shadow)}
  .cat-side.open .category-list{display:grid;grid-template-columns:repeat(2,1fr);gap:4px}
  .cat-side.open .category-list a{font-size:14px;padding:10px 12px}
  .hero h1{font-size:33px}
  .detail-main,.page-main{padding:28px 24px}
}
@media (max-width:640px){
  .grid-4,.grid-3{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero-inner{padding:58px 20px 54px}
  .hero h1{font-size:25px}
  .hero-sub{font-size:16px}
  .section{padding:46px 0}
  .article-title{font-size:22px}
  .list-title{font-size:24px}
  .section-title{font-size:21px}
  h1,h2,h3,h4,p,li,td,th{overflow-wrap:anywhere;word-break:break-word}
  .float-rail{right:10px}
  .float-capsule{width:54px;padding:10px 4px}
  .site-nav{position:absolute;top:70px;left:0;right:0;background:#fff;border-bottom:1px solid var(--c-line);display:none;box-shadow:0 12px 24px rgba(11,16,32,.1)}
  .site-nav.open{display:block}
  .site-nav ul{flex-direction:column;padding:10px 16px}
  .nav-toggle{display:flex}
  .wechat-modal-img{width:min(300px,calc(100vw - 80px));height:auto;aspect-ratio:3/5}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
}