/* 文慧 SanYe — 1688 店铺风格（白底 / 黑字 / 极简 / 卡片网格） */
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;color:#1a1a1a;background:#fff;font-size:14px;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font-family:inherit}
.site{display:flex;flex-direction:column;min-height:100vh}
.site-main{flex:1;width:100%}

/* ---------- 顶栏 ---------- */
.topbar{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid #ececec}
.topbar-inner{max-width:1280px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:12px}
.brand-logo{height:27px;width:auto;display:block}
.logo{display:flex;align-items:center}
.brand-name{font-size:17px;font-weight:800;letter-spacing:.02em;display:flex;align-items:baseline;gap:8px}
.brand-sub{font-size:12px;font-weight:400;color:#9a9a9a;letter-spacing:.16em;padding-left:12px;border-left:1px solid #e8e8e8;line-height:1}
.nav{display:flex;align-items:center;gap:34px}
.nav a{font-size:14px;color:#444;letter-spacing:.03em;padding:6px 0;border-bottom:2px solid transparent;transition:.2s}
.nav a:hover{color:#000;border-bottom-color:#1a1a1a}
.nav .nav-btn{background:#1a1a1a;color:#fff;padding:9px 20px;border-bottom:0;font-size:13px}
.nav .nav-btn:hover{background:#000;color:#fff}

/* ---------- 首页：1:1 区块 ---------- */
.home-cover img{width:100%;height:auto;display:block}
.home-actions{max-width:1200px;margin:0 auto;padding:26px 20px;display:flex;gap:14px;justify-content:center;align-items:center;border-bottom:1px solid #f2f2f2}
.home-block{width:100%}
.home-block img{width:100%;height:auto;display:block}
.series-link{max-width:1200px;margin:0 auto;padding:16px 20px 40px;text-align:center}
.series-link a{font-size:13px;letter-spacing:.08em;color:#555;padding-bottom:3px;border-bottom:1px solid #ccc}
.series-link a:hover{color:#000;border-bottom-color:#000}
.cat-links{display:flex;justify-content:center;gap:30px;flex-wrap:wrap;padding:18px 20px 38px;border-bottom:1px solid #f2f2f2}
.cat-links a{font-size:13px;color:#555;letter-spacing:.04em}
.cat-links a:hover{color:#000}
.swatch-wrap{background:#fafafa;padding:50px 20px}
.swatch{max-width:820px;margin:0 auto;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.swatch img{width:100%;display:block}
.swatch-txt h3{font-size:22px;margin:0 0 12px;font-weight:800;letter-spacing:.03em}
.swatch-txt p{color:#777;font-size:13px;line-height:1.9;margin:0 0 18px}

/* ---------- 通用版面 ---------- */
.sec{max-width:1200px;margin:0 auto;padding:60px 20px}
.sec-title,.page-title{font-size:28px;font-weight:800;letter-spacing:.02em;margin:0 0 30px;display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}
.sec-title small,.page-title small{font-size:11px;color:#a0a0a0;font-weight:500;letter-spacing:.24em;text-transform:uppercase}
.empty{color:#999;padding:60px 0;text-align:center}

/* 分类 tab */
.cat-filter{display:flex;gap:30px;border-bottom:1px solid #eee;margin-bottom:32px;flex-wrap:wrap}
.cat-pill{padding:11px 0;font-size:14px;color:#666;border-bottom:2px solid transparent;transition:.2s}
.cat-pill:hover{color:#000}
.cat-pill.active{color:#111;border-bottom-color:#1a1a1a;font-weight:700}

/* 商品网格 */
.p-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.p-card{display:block;border:1px solid #efefef;background:#fff;transition:.25s ease;overflow:hidden}
.p-card:hover{box-shadow:0 10px 28px rgba(0,0,0,.09);border-color:#e2e2e2;transform:translateY(-2px)}
.p-img{position:relative;aspect-ratio:1/1;overflow:hidden;background:#f7f7f7}
.p-img img{width:100%;height:100%;object-fit:cover;transition:.4s}
.p-card:hover .p-img img{transform:scale(1.04)}
.p-tag{position:absolute;left:0;top:0;background:#1a1a1a;color:#fff;font-size:11px;padding:3px 9px;letter-spacing:.06em}
.p-info{padding:13px 13px 16px}
.p-name{font-size:13px;line-height:1.5;height:39px;overflow:hidden;color:#222}
.p-spec{font-size:12px;color:#a0a0a0;margin-top:5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.p-price{margin-top:9px;display:flex;align-items:baseline;gap:7px}
.cur{font-size:18px;font-weight:800;color:#1a1a1a;letter-spacing:-.01em}
.ori{font-size:12px;color:#c0c0c0;text-decoration:line-through}

/* 按钮 */
.btn-gold,.btn-dark{display:inline-block;background:#1a1a1a;color:#fff;padding:12px 30px;font-size:13px;letter-spacing:.1em;border:1px solid #1a1a1a;transition:.2s;cursor:pointer;text-align:center}
.btn-gold:hover,.btn-dark:hover{background:#000;border-color:#000;color:#fff}
.btn-gold.big,.btn-dark.big{display:block;width:100%;padding:15px 0;font-size:15px}
.btn-line{display:inline-block;background:#fff;color:#333;padding:11px 28px;font-size:13px;letter-spacing:.1em;border:1px solid #d8d8d8;transition:.2s}
.btn-line:hover{border-color:#1a1a1a;color:#000}

/* ---------- 商品详情 ---------- */
.detail-layout{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:56px;align-items:start}
.detail-img{background:#f7f7f7;border:1px solid #f0f0f0}
.detail-img img{width:100%;height:auto}
.detail-gallery .d-main{background:#f7f7f7;border:1px solid #f0f0f0}
.detail-gallery .d-main img{width:100%;height:auto;display:block}
.d-thumbs{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.d-thumb{width:66px;height:66px;padding:0;border:1px solid #e2e2e2;background:#fff;cursor:pointer;overflow:hidden;font:inherit}
.d-thumb.on{border-color:#1a1a1a}
.d-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.detail-long{margin-top:44px;border-top:1px solid #f0f0f0;padding-top:32px}
.detail-long img{width:100%;height:auto;display:block;margin:0 auto}
.d-price{display:flex;align-items:baseline;gap:10px;background:#fafafa;padding:16px 18px;margin-bottom:18px}
.d-price .cur{font-size:32px}
.d-spec{font-size:12px;color:#999;margin-left:auto}
.d-name{font-size:22px;font-weight:800;line-height:1.5;margin:0 0 14px;letter-spacing:.01em}
.d-desc{color:#666;font-size:14px;line-height:1.9;margin:0 0 22px}
.d-detail{border-top:1px solid #eee;padding-top:22px;margin-bottom:24px}
.d-detail h3{font-size:14px;letter-spacing:.12em;color:#1a1a1a;margin:0 0 12px}
.d-detail p{color:#666;font-size:13px;line-height:2}
.d-notice{background:#fafafa;border-left:3px solid #c9a227;padding:12px 16px;font-size:12px;color:#777;line-height:1.9;margin-bottom:24px}

/* ---------- 表单 ---------- */
.card{background:#fff;border:1px solid #eee;padding:26px}
.checkout-layout{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.85fr);gap:24px;align-items:start}
.checkout-form h2,.checkout-summary h2{font-size:15px;font-weight:700;letter-spacing:.08em;margin:0 0 20px;padding-bottom:12px;border-bottom:1px solid #eee}
.checkout-form label{display:block;font-size:13px;color:#555;margin-bottom:16px}
.checkout-form input,.checkout-form textarea{width:100%;margin-top:7px;padding:11px 13px;border:1px solid #e0e0e0;font-size:14px;color:#1a1a1a;outline:none;transition:.2s;background:#fff}
.checkout-form input:focus,.checkout-form textarea:focus{border-color:#1a1a1a}
.checkout-form textarea{resize:vertical}
.form-error{background:#fff2f2;color:#c0392b;padding:10px 14px;font-size:13px;margin-bottom:16px;border-left:3px solid #c0392b}
.checkout-note{font-size:12px;color:#999;line-height:1.9;margin-top:16px}
.sum-row{display:flex;gap:14px;align-items:center}
.sum-img{width:82px;height:82px;object-fit:cover;background:#f7f7f7;border:1px solid #f0f0f0}
.sum-name{font-size:13px;line-height:1.5}
.sum-spec{font-size:12px;color:#a0a0a0;margin-top:4px}
.sum-price{font-size:12px;color:#666;margin-top:6px}
.sum-total{display:flex;justify-content:space-between;align-items:center;margin-top:20px;padding-top:18px;border-top:1px solid #eee;font-size:13px;color:#555}
.sum-total .cur{font-size:22px}

/* ---------- 下单成功 ---------- */
.success .success-box{max-width:560px;margin:0 auto;text-align:center;padding:52px 32px}
.check-icon{width:56px;height:56px;line-height:56px;border-radius:50%;background:#1a1a1a;color:#fff;font-size:26px;margin:0 auto 22px}
.success h1{font-size:24px;font-weight:800;margin:0 0 12px;letter-spacing:.03em}
.success p{color:#777;font-size:13px;margin:6px 0}
.order-no{margin:18px 0;font-size:13px;color:#555;background:#fafafa;padding:12px}
.order-no strong{color:#1a1a1a;letter-spacing:.06em}
.success-actions{display:flex;gap:12px;justify-content:center;margin-top:26px}

/* ---------- 页脚 ---------- */
.site-footer{background:#1a1a1a;color:#cfcfcf;margin-top:0}
.footer-inner{max-width:1200px;margin:0 auto;padding:52px 20px 30px;display:grid;grid-template-columns:1.4fr 1fr;gap:40px}
.footer-brand{font-size:17px;font-weight:800;color:#fff;letter-spacing:.02em}
.footer-slogan{font-size:12px;color:#8f8f8f;margin-top:8px;letter-spacing:.08em}
.footer-contact{font-size:13px;line-height:2.1;color:#b5b5b5}
.footer-copy{max-width:1200px;margin:0 auto;padding:18px 20px 34px;border-top:1px solid #303030;font-size:12px;color:#777;letter-spacing:.02em}

/* ---------- 旧类兼容 ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.cat-item{text-align:center}
.story-card p{color:#666;line-height:2;font-size:14px}

/* ---------- 响应式 ---------- */
@media (max-width:1000px){
  .p-grid{grid-template-columns:repeat(3,1fr)}
  .detail-layout{grid-template-columns:1fr;gap:26px}
  .swatch{grid-template-columns:1fr;gap:20px}
  .footer-inner{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:700px){
  .topbar-inner{height:58px;padding:0 16px}
  .brand-sub{display:none}
  .nav{gap:18px}
  .nav a{font-size:13px}
  .nav .nav-btn{padding:7px 14px}
  .p-grid{grid-template-columns:repeat(2,1fr);gap:12px}
  .sec{padding:40px 16px}
  .sec-title,.page-title{font-size:22px}
  .home-actions{padding:18px 16px;flex-wrap:wrap}
  .cat-links{gap:18px}
}

/* ==================== 购物车 ==================== */
.cart-link{position:relative;display:inline-flex;align-items:center;gap:5px;color:#333;font-size:13px;letter-spacing:.06em;padding:4px 2px}
.cart-link:hover{color:#000}
.cart-ico{flex:none}
.cart-badge{position:absolute;top:-7px;right:-14px;min-width:16px;height:16px;line-height:16px;background:#d33;color:#fff;font-size:10px;font-weight:700;text-align:center;padding:0 4px;border-radius:9px}

/* 详情页：购买数量 */
.qty-line{display:flex;align-items:center;gap:14px;margin:24px 0 16px;flex-wrap:wrap}
.qty-label{font-size:13px;color:#666;letter-spacing:.06em}
.qty-box{display:inline-flex;align-items:center;border:1px solid #ddd;height:42px}
.qty-btn{width:40px;height:40px;background:#fafafa;border:0;font-size:18px;color:#333;cursor:pointer;line-height:1;padding:0}
.qty-btn:hover{background:#f0f0f0}
.qty-box input{width:66px;height:40px;border:0;text-align:center;font-size:15px;font-weight:700;border-left:1px solid #eee;border-right:1px solid #eee;-moz-appearance:textfield;background:#fff}
.qty-box input:focus{outline:0;background:#fcfcfc}
.qty-box input::-webkit-outer-spin-button,.qty-box input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.qty-total{font-size:13px;color:#888}
.qty-total b{font-size:20px;color:#1a1a1a;font-weight:800;margin-left:6px}
.d-actions{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.d-actions .btn-line,.d-actions .btn-gold{display:block;width:100%;padding:15px 0;font-size:15px;text-align:center;border-radius:0;font-family:inherit;cursor:pointer}
.d-service{display:flex;gap:18px;flex-wrap:wrap;margin-top:20px;padding-top:16px;border-top:1px solid #f0f0f0;font-size:12px;color:#999}

/* 购物车页 */
.cart-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:30px;align-items:start}
.cart-list{border-top:1px solid #eee}
.cart-row{display:grid;grid-template-columns:78px minmax(0,1fr) 118px 92px 44px;gap:14px;align-items:center;padding:18px 0;border-bottom:1px solid #f0f0f0}
.cart-thumb{display:block;width:78px;height:78px;background:#fafafa;overflow:hidden}
.cart-thumb img{width:100%;height:100%;object-fit:cover}
.cart-name{display:block;font-size:14px;color:#1a1a1a;font-weight:600;line-height:1.5}
.cart-name:hover{color:#000;text-decoration:underline}
.cart-spec{font-size:12px;color:#999;margin-top:4px}
.cart-unit{font-size:12px;color:#888;margin-top:6px}
.cart-qty{display:flex;align-items:center;border:1px solid #e5e5e5;height:34px;justify-self:start}
.q-btn{width:30px;line-height:32px;text-align:center;color:#555;font-size:15px}
.q-btn:hover{background:#f5f5f5;color:#000}
.q-num{width:38px;text-align:center;font-size:13px;font-weight:700;border-left:1px solid #eee;border-right:1px solid #eee;line-height:32px}
.cart-sub{font-size:14px;font-weight:800;color:#1a1a1a;text-align:right;white-space:nowrap}
.cart-del{font-size:12px;color:#aaa;text-align:right}
.cart-del:hover{color:#d33}
.cart-summary{position:sticky;top:96px}
.cart-summary h2,.checkout-form h2,.checkout-summary h2{font-size:16px;font-weight:800;margin:0 0 18px;letter-spacing:.02em}
.sum-line{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:#666;padding:9px 0;border-bottom:1px dashed #f0f0f0}
.sum-line b{color:#1a1a1a;font-weight:600}
.sum-line.note b{color:#999;font-weight:400}
.sum-line.total{border-bottom:0;padding-top:14px;align-items:baseline}
.sum-line.total .cur{font-size:24px}
.cart-summary .btn-gold{margin-top:16px}
.cart-summary .btn-line{margin-top:10px}
.btn-line.full{display:block;width:100%;text-align:center}
.cart-clear{display:block;margin-top:14px;font-size:12px;color:#aaa;text-align:center}
.cart-clear:hover{color:#d33}
.cart-empty{text-align:center;padding:70px 0}
.cart-empty-ico{font-size:38px;opacity:.3;margin-bottom:14px}
.cart-empty p{color:#999;font-size:14px;margin:0 0 22px}
.cart-back{display:block;margin-top:8px;font-size:12px;color:#999;text-align:center}
.cart-back:hover{color:#1a1a1a}

/* 结算页商品清单 */
.checkout-summary .sum-row{display:flex;gap:12px;padding:12px 0;border-bottom:1px solid #f5f5f5}
.sum-img{width:56px;height:56px;object-fit:cover;background:#fafafa;flex:none}
.sum-name{font-size:13px;font-weight:600;color:#1a1a1a;line-height:1.5}
.sum-spec{font-size:11px;color:#999;margin-top:3px}
.sum-price{font-size:12px;color:#666;margin-top:4px}
.form-error{background:#fdf0f0;color:#c33;font-size:13px;padding:10px 12px;margin-bottom:14px}

@media(max-width:760px){
  .cart-txt{display:none}
  .cart-layout{grid-template-columns:1fr;gap:22px}
  .cart-summary{position:static}
  .cart-row{grid-template-columns:64px minmax(0,1fr) 44px;grid-template-areas:"thumb main del" "qty qty sub";gap:10px 12px;align-items:start}
  .cart-thumb{width:64px;height:64px;grid-area:thumb}
  .cart-main{grid-area:main}
  .cart-qty{grid-area:qty;justify-self:start}
  .cart-sub{grid-area:sub;text-align:left}
  .cart-del{grid-area:del}
  .d-actions{grid-template-columns:1fr}
  .qty-line{gap:10px}
}

@media(max-width:790px){.checkout-layout{grid-template-columns:1fr}.cart-layout{grid-template-columns:1fr}}

/* ===== 订单详情 / 分享 ===== */
.order-page{max-width:860px;margin:0 auto}
.order-card{background:#fff;padding:34px 38px}
.order-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;border-bottom:1px solid #eee;padding-bottom:20px}
.order-kicker{font-size:12px;letter-spacing:.12em;color:#999;text-transform:uppercase}
.order-no-big{font-size:24px;margin:6px 0 0;font-weight:700;letter-spacing:.02em}
.order-status{font-size:13px;padding:6px 14px;border:1px solid #1a1a1a;color:#1a1a1a;white-space:nowrap}
.status-已完成{border-color:#2e7d32;color:#2e7d32}
.status-已取消{border-color:#bbb;color:#999}
.status-已发货{border-color:#b7791f;color:#b7791f}
.order-meta{font-size:12px;color:#999;margin-top:14px}
.order-steps{display:flex;flex-wrap:wrap;gap:8px 28px;margin:24px 0 8px;padding:16px;background:#fafafa}
.step{display:flex;align-items:center;gap:8px;font-size:13px;color:#bbb}
.step.on{color:#1a1a1a}
.dot{width:9px;height:9px;border-radius:50%;background:#ddd}
.step.on .dot{background:#1a1a1a}
.step-time{font-size:11px;color:#aaa}
.order-sub{font-size:14px;font-weight:700;margin:26px 0 12px;padding-bottom:8px;border-bottom:1px solid #eee}
.order-items .order-item{padding:10px 0;border-bottom:1px dashed #f0f0f0;font-size:13px;color:#333}
.order-sum{display:flex;justify-content:space-between;font-size:13px;color:#666;padding-top:14px}
.order-sum strong{font-size:19px;color:#1a1a1a}
.order-info{font-size:13px;color:#333;line-height:2.1}
.order-info .k{display:inline-block;width:82px;color:#999;font-size:12px}
.track-no{background:#f5f5f5;padding:3px 8px;font-size:13px}
.mini-link{margin-left:10px;font-size:12px;color:#b7791f;text-decoration:underline}
.order-note{margin-top:14px;font-size:12px;color:#b7791f;background:#fdf9f0;padding:10px 12px}
.order-share{margin-top:28px;padding:18px;background:#fafafa;border:1px solid #eee}
.share-tip{font-size:12px;color:#888;margin-bottom:10px;line-height:1.7}
.share-row{display:flex;gap:8px}
.share-input{flex:1;min-width:0;padding:11px 12px;border:1px solid #ddd;font-size:12px;color:#333;background:#fff}
.btn-copy{padding:0 22px;height:42px;line-height:42px;border:none;cursor:pointer;font-size:13px}
.share-hint{font-size:12px;margin-top:8px;color:#999}
.share-hint.ok{color:#2e7d32}
.share-hint.fail{color:#c33}
.order-actions{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
.success-share{margin:22px 0 6px;text-align:left}

/* ===== 查订单 ===== */
.lookup-page{max-width:640px;margin:0 auto}
.lookup-card{padding:38px}
.lookup-title{font-size:24px;margin:0 0 12px;font-weight:700}
.lookup-tip{font-size:13px;color:#888;line-height:1.8;margin:0 0 24px}
.lookup-row{display:flex;gap:10px}
.lookup-input{flex:1;min-width:0;padding:12px 14px;border:1px solid #ddd;font-size:14px;background:#fff}
.lookup-btn{padding:0 26px;height:46px;line-height:46px;border:none;cursor:pointer;font-size:14px}
.lookup-hint{font-size:12px;color:#999;margin-top:10px}
.lookup-hint.fail{color:#c33}
.lookup-links{margin-top:20px;font-size:12px}
@media(max-width:760px){
  .lookup-card{padding:26px 20px}
  .lookup-row{flex-direction:column}
  .lookup-btn{width:100%}
}
@media(max-width:760px){
  .order-card{padding:24px 20px}
  .order-head{flex-direction:column;align-items:flex-start}
  .share-row{flex-direction:column}
  .btn-copy{width:100%}
  .order-info .k{width:auto;margin-right:10px}
}

/* ---------------- 语言切换 ---------------- */
.lang-select {
  -webkit-appearance: none;
  appearance: none;
  border: 1px solid rgba(0, 0, 0, .18);
  background: #fff url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23999'/%3E%3C/svg%3E") no-repeat right 8px center;
  background-size: 9px;
  color: #1a1a1a;
  font-family: inherit;
  font-size: 13px;
  line-height: 1.2;
  padding: 6px 24px 6px 10px;
  border-radius: 4px;
  cursor: pointer;
  margin-left: 12px;
}
.lang-select:hover { border-color: #b7791f; }
@media (max-width: 860px) {
  .lang-select { font-size: 12px; padding: 4px 22px 4px 8px; margin-left: 8px; }
}

/* ---------- 浮动联系按钮（邮件 / WhatsApp） ---------- */
.float-dock{position:fixed;right:22px;bottom:24px;z-index:9999;display:flex;flex-direction:column;align-items:flex-end;gap:10px}
.dock-btn{display:inline-flex;align-items:center;gap:8px;color:#fff;font-size:13px;font-weight:600;padding:11px 16px 11px 13px;border-radius:999px;text-decoration:none;box-shadow:0 8px 24px rgba(0,0,0,.18);transition:transform .15s ease,box-shadow .15s ease}
.dock-btn:hover{color:#fff;transform:translateY(-2px);box-shadow:0 12px 28px rgba(0,0,0,.24)}
.dock-btn svg{flex:0 0 auto}
.dock-mail{background:#1a1a1a}
.dock-wa{background:#25d366}
.dock-txt{white-space:nowrap}

/* 页脚联系按钮 */
.footer-wa{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.wa-btn{display:inline-flex;align-items:center;gap:8px;background:#25d366;color:#fff;font-size:14px;font-weight:600;padding:10px 18px;border-radius:999px;text-decoration:none;box-shadow:0 6px 18px rgba(37,211,102,.28);transition:transform .15s ease,box-shadow .15s ease}
.wa-btn:hover{color:#fff;transform:translateY(-1px);box-shadow:0 9px 22px rgba(37,211,102,.36)}
.wa-btn svg{flex:0 0 auto}
.mail-btn{display:inline-flex;align-items:center;gap:8px;background:#1a1a1a;color:#fff;font-size:14px;font-weight:600;padding:10px 18px;border-radius:999px;text-decoration:none;box-shadow:0 6px 18px rgba(0,0,0,.18);transition:transform .15s ease,box-shadow .15s ease}
.mail-btn:hover{color:#fff;transform:translateY(-1px);box-shadow:0 9px 22px rgba(0,0,0,.26)}
.mail-btn svg{flex:0 0 auto}
.mail-btn-txt{word-break:break-all}

/* ---------- 移动端导航：汉堡 + 抽屉 ---------- */
.nav-toggle,.nav-burger,.nav-backdrop{display:none}
@media (max-width:820px){
  .topbar-inner{height:56px;padding:0 14px;position:relative;justify-content:space-between}
  .brand-logo{height:24px}
  .brand-sub{display:none}
  .nav-toggle{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
  .nav-burger{display:flex;flex-direction:column;justify-content:center;gap:4px;width:40px;height:40px;padding:0 9px;margin-left:auto;cursor:pointer;border-radius:8px;-webkit-tap-highlight-color:transparent}
  .nav-burger span{display:block;height:2px;background:#1a1a1a;border-radius:2px;transition:transform .2s ease,opacity .2s ease}
  .nav{display:none;position:absolute;z-index:2;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;gap:0;background:#fff;border-bottom:1px solid #e8e8e8;box-shadow:0 16px 28px rgba(0,0,0,.1);padding:4px 0 14px;max-height:calc(100vh - 56px);overflow-y:auto}
  .nav-toggle:checked ~ .nav{display:flex}
  .topbar{z-index:9998}
  body:has(#nav-toggle:checked) .nav-backdrop{display:block;position:fixed;left:0;right:0;top:56px;bottom:0;z-index:9997;background:rgba(0,0,0,.34)}
  .nav-toggle:checked ~ .nav-burger span:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .nav-toggle:checked ~ .nav-burger span:nth-child(2){opacity:0}
  .nav-toggle:checked ~ .nav-burger span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
  .nav a{display:block;padding:13px 18px;font-size:15px;color:#333;border-bottom:1px solid #f3f3f3;white-space:nowrap;letter-spacing:.02em}
  .nav a:hover{background:#fafafa;border-bottom-color:#f3f3f3;color:#000}
  .nav .cart-link{display:flex;align-items:center;gap:6px}
  .nav .cart-txt{display:inline}
  .nav .nav-btn{margin:12px 18px 0;text-align:center;background:#1a1a1a;color:#fff;border-bottom:0;padding:12px 0;font-size:14px}
  .nav .lang-select{margin:12px 18px 0;width:calc(100% - 36px);font-size:14px;padding:9px 30px 9px 12px}
  .float-dock{right:14px;bottom:14px;gap:8px}
  .dock-btn{padding:0;width:48px;height:48px;border-radius:50%;justify-content:center}
  .dock-txt{display:none}
  .dock-btn svg{width:22px;height:22px}
}