/* ===================== 基础变量 ===================== */
:root{
  --brand:#ff7a45;        /* 主题橙 */
  --brand-dark:#e8622d;
  --brand-soft:#fff3ec;
  --accent:#3ac1a8;       /* 辅助青 */
  --ink:#2b2b33;
  --ink-2:#6b6b78;
  --line:#ececef;
  --bg:#f6f7f9;
  --white:#fff;
  --radius:14px;
  --shadow:0 6px 24px rgba(30,30,40,.08);
  --shadow-lg:0 14px 40px rgba(30,30,40,.14);
  --maxw:1200px;
  --font:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
ul{list-style:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px;width:100%}

/* ===================== 按钮 ===================== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;
  border:none;cursor:pointer;font-size:15px;font-weight:600;padding:12px 26px;
  border-radius:999px;transition:.25s;font-family:inherit;white-space:nowrap}
.btn--primary{background:var(--brand);color:#fff}
.btn--primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 8px 20px rgba(255,122,69,.4)}
.btn--light{background:#fff;color:var(--brand);font-weight:700}
.btn--light:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,.15)}
.btn--outline{background:transparent;border:1.5px solid var(--brand);color:var(--brand)}
.btn--outline:hover{background:var(--brand);color:#fff}

/* ===================== 顶部条 ===================== */
.topbar{background:#2b2b33;color:#d9d9df;font-size:13px}
.topbar__inner{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar__links{display:flex;gap:18px}
.topbar__links a:hover{color:#fff}

/* ===================== 页头 ===================== */
.header{background:#fff;position:sticky;top:0;z-index:100;box-shadow:0 1px 0 var(--line)}
.header__inner{display:flex;align-items:center;gap:28px;height:82px}
.logo{display:flex;align-items:center;gap:8px;font-size:24px;font-weight:800;flex-shrink:0}
.logo__mark{font-size:30px}
.logo__text em{color:var(--brand);font-style:normal}
.logo--light{color:#fff}.logo--light .logo__text em{color:var(--brand)}

.search{flex:1;max-width:560px;display:flex;border:2px solid var(--brand);border-radius:999px;overflow:hidden;background:#fff}
.search__input{flex:1;border:none;outline:none;padding:0 20px;font-size:15px;font-family:inherit;background:transparent}
.search__btn{display:flex;align-items:center;gap:6px;background:var(--brand);color:#fff;border:none;
  padding:0 24px;font-size:15px;font-weight:600;cursor:pointer;font-family:inherit;transition:.2s}
.search__btn:hover{background:var(--brand-dark)}

.header__actions{display:flex;align-items:center;gap:22px;flex-shrink:0}
.icon-btn{display:flex;flex-direction:column;align-items:center;gap:2px;color:var(--ink-2);font-size:12px;transition:.2s;position:relative}
.icon-btn:hover{color:var(--brand)}
.cart-btn .cart-count{position:absolute;top:-6px;right:2px;background:var(--brand);color:#fff;
  font-size:11px;font-weight:700;min-width:18px;height:18px;line-height:18px;text-align:center;border-radius:999px;padding:0 4px}

.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.hamburger span{width:24px;height:2.5px;background:var(--ink);border-radius:2px;transition:.3s}

/* ===================== 主导航 ===================== */
.nav{background:#fff;border-top:1px solid var(--line)}
.nav__inner{display:flex;align-items:stretch;gap:0;height:50px}

/* 全部分类 */
.cat{position:relative;width:220px;flex-shrink:0}
.cat__toggle{width:100%;height:100%;display:flex;align-items:center;gap:8px;
  background:var(--brand);color:#fff;border:none;font-size:15px;font-weight:600;
  padding:0 18px;cursor:pointer;font-family:inherit;border-radius:8px 8px 0 0}
.cat__menu{position:absolute;top:100%;left:0;width:220px;background:#fff;
  box-shadow:var(--shadow-lg);border-radius:0 0 8px 8px;overflow:visible;z-index:60;
  opacity:0;visibility:hidden;transform:translateY(8px);transition:.22s}
.cat:hover .cat__menu{opacity:1;visibility:visible;transform:translateY(0)}
.cat__item{position:relative}
.cat__item>a{display:flex;align-items:center;justify-content:space-between;padding:13px 18px;font-size:14px;transition:.15s}
.cat__item>a .ci-ico{margin-right:8px}
.cat__item:hover>a{background:var(--brand-soft);color:var(--brand)}
.cat__item:not(:last-child){border-bottom:1px solid var(--line)}

/* 子分类面板 */
.subcat{position:absolute;top:0;left:100%;width:520px;min-height:100%;background:#fff;
  box-shadow:var(--shadow-lg);padding:22px 24px;border-radius:0 8px 8px 0;
  opacity:0;visibility:hidden;transform:translateX(8px);transition:.22s;z-index:70;
  display:grid;grid-template-columns:1fr 1fr;gap:14px 24px;align-content:start}
.cat__item:hover .subcat{opacity:1;visibility:visible;transform:translateX(0)}
.subcat__group h5{font-size:14px;color:var(--brand);margin-bottom:6px}
.subcat__group a{display:inline-block;font-size:13px;color:var(--ink-2);padding:3px 8px;margin:2px 4px 2px 0;border-radius:6px;transition:.15s}
.subcat__group a:hover{background:var(--brand-soft);color:var(--brand)}

.nav__links{display:flex;align-items:center;gap:6px;margin-left:20px}
.nav__links a{padding:0 16px;height:50px;display:flex;align-items:center;font-size:15px;font-weight:500;color:var(--ink);position:relative;transition:.2s}
.nav__links a:hover,.nav__links a.active{color:var(--brand)}
.nav__links a.active::after{content:"";position:absolute;left:16px;right:16px;bottom:8px;height:3px;background:var(--brand);border-radius:2px}

/* ===================== 轮播 ===================== */
.hero{padding:22px 0 0}
.carousel{position:relative;max-width:var(--maxw);margin:0 auto;border-radius:18px;overflow:hidden;box-shadow:var(--shadow);height:420px}
.carousel__track{display:flex;height:100%;transition:transform .6s cubic-bezier(.4,0,.2,1)}
.slide{min-width:100%;height:100%;position:relative;display:flex;align-items:center;overflow:hidden}
.slide__bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1}
.slide__overlay{position:absolute;inset:0;z-index:2;
  background:linear-gradient(110deg,rgba(30,30,40,.72) 0%,rgba(30,30,40,.35) 45%,transparent 70%)}
.slide__content{position:relative;z-index:3;padding:0 8%;max-width:600px;color:#fff}
.slide__tag{display:inline-block;background:rgba(255,255,255,.22);backdrop-filter:blur(4px);
  padding:5px 14px;border-radius:999px;font-size:13px;font-weight:600;margin-bottom:16px}
.slide__title{font-size:42px;font-weight:800;line-height:1.2;margin-bottom:14px;text-shadow:0 2px 12px rgba(0,0,0,.25)}
.slide__desc{font-size:17px;margin-bottom:26px;opacity:.95}

.carousel__arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:5;
  width:46px;height:46px;border-radius:50%;border:none;background:rgba(255,255,255,.8);color:var(--ink);
  cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.2s;opacity:0}
.carousel:hover .carousel__arrow{opacity:1}
.carousel__arrow:hover{background:#fff;box-shadow:var(--shadow)}
.carousel__arrow--prev{left:18px}
.carousel__arrow--next{right:18px}
.carousel__dots{position:absolute;bottom:18px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:5}
.carousel__dots button{width:10px;height:10px;border-radius:999px;border:none;background:rgba(255,255,255,.6);cursor:pointer;transition:.3s;padding:0}
.carousel__dots button.active{width:28px;background:#fff}

/* ===================== 服务保障 ===================== */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:24px auto}
.feature{background:#fff;border-radius:var(--radius);padding:18px 20px;display:flex;align-items:center;gap:14px;box-shadow:var(--shadow)}
.feature__ico{font-size:30px}
.feature strong{display:block;font-size:15px}
.feature small{color:var(--ink-2);font-size:13px}

/* ===================== 促销 ===================== */
.promo{margin:20px 0}
.promo__inner{background:linear-gradient(120deg,#ff7a45,#ff5a7a 60%,#ff477e);
  border-radius:20px;padding:40px 48px;display:flex;align-items:center;justify-content:space-between;
  gap:40px;color:#fff;position:relative;overflow:hidden;box-shadow:var(--shadow-lg)}
.promo__inner::before{content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;background:rgba(255,255,255,.12);border-radius:50%}
.promo__inner::after{content:"";position:absolute;left:-40px;bottom:-70px;width:200px;height:200px;background:rgba(255,255,255,.1);border-radius:50%}
.promo__left{position:relative;z-index:2}
.promo__badge{display:inline-block;background:#fff;color:var(--brand);font-weight:700;padding:5px 16px;border-radius:999px;font-size:13px;margin-bottom:14px}
.promo__title{font-size:34px;font-weight:800;margin-bottom:10px}
.promo__desc{font-size:16px;opacity:.96;margin-bottom:22px;max-width:520px}
.promo__desc b{font-size:20px}
.countdown{display:flex;align-items:center;gap:8px;margin-bottom:26px}
.countdown__item{background:rgba(0,0,0,.22);border-radius:10px;min-width:60px;padding:8px 4px;text-align:center}
.countdown__item span{display:block;font-size:28px;font-weight:800;line-height:1;font-variant-numeric:tabular-nums}
.countdown__item small{font-size:12px;opacity:.85}
.countdown__sep{font-size:26px;font-weight:800;opacity:.7}

.promo__right{position:relative;z-index:2;flex-shrink:0}
.promo__price-card{background:#fff;color:var(--ink);border-radius:16px;padding:26px 34px;text-align:center;width:250px;box-shadow:var(--shadow-lg);position:relative}
.promo__tag{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:#ffd23f;color:#7a5200;font-weight:700;font-size:12px;padding:4px 14px;border-radius:999px;white-space:nowrap}
.promo__save{color:var(--ink-2);font-size:15px;margin-top:6px}
.promo__amount{color:var(--brand);font-size:60px;font-weight:800;line-height:1;margin:2px 0 8px}
.promo__amount em{font-size:28px;font-style:normal;vertical-align:super}
.promo__cond{font-size:12px;color:var(--ink-2);margin-bottom:16px}

/* ===================== 商品 ===================== */
.section-head{text-align:center;margin:44px 0 26px}
.section-head__title{font-size:30px;font-weight:800;position:relative;display:inline-block}
.section-head__title::after{content:"";display:block;width:52px;height:4px;background:var(--brand);border-radius:2px;margin:10px auto 0}
.section-head__sub{color:var(--ink-2);margin-top:10px;font-size:15px}

.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.28s;display:flex;flex-direction:column;position:relative}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.card__tag{position:absolute;top:12px;left:12px;z-index:3;background:var(--brand);color:#fff;font-size:12px;font-weight:600;padding:4px 10px;border-radius:6px}
.card__tag--hot{background:#ff477e}
.card__tag--new{background:var(--accent)}
.card__media{height:210px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;background:#f8f9fb}
.card__media img{width:100%;height:100%;object-fit:contain;padding:12px;transition:.3s}
.card:hover .card__media img{transform:scale(1.04)}
.card__body{padding:16px 16px 18px;display:flex;flex-direction:column;flex:1}
.card__name{font-size:16px;font-weight:600;line-height:1.4;margin-bottom:4px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:44px}
.card__spec{font-size:12px;color:var(--ink-2);margin-bottom:10px}
.card__rate{font-size:12px;color:#ff9500;margin-bottom:10px}
.card__rate span{color:var(--ink-2);margin-left:6px}
.card__price-row{display:flex;align-items:baseline;gap:8px;margin-top:auto}
.card__price{color:var(--brand);font-size:24px;font-weight:800}
.card__price em{font-size:15px;font-style:normal}
.card__origin{color:var(--ink-2);text-decoration:line-through;font-size:13px}
.card__foot{display:flex;align-items:center;gap:8px;margin-top:14px}
.card__sold{font-size:12px;color:var(--ink-2);flex:1}
.add-cart{display:flex;align-items:center;gap:5px;background:var(--brand);color:#fff;border:none;
  padding:9px 16px;border-radius:999px;font-size:13px;font-weight:600;cursor:pointer;transition:.2s;font-family:inherit}
.add-cart:hover{background:var(--brand-dark);transform:scale(1.05)}
.add-cart svg{width:16px;height:16px}

.products__more{text-align:center;margin:34px 0 10px}

/* ===================== 品牌承诺条 ===================== */
.cta-band{background:linear-gradient(120deg,#3ac1a8,#2ba0d8);color:#fff;margin-top:50px;padding:56px 0}
.cta-band__inner{text-align:center}
.cta-band h2{font-size:32px;font-weight:800;margin-bottom:10px}
.cta-band p{font-size:16px;opacity:.95;margin-bottom:24px}

/* ===================== 页脚 ===================== */
.footer{background:#22222a;color:#b6b6c2;margin-top:0;padding-top:48px;font-size:14px}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:36px;border-bottom:1px solid #34343f}
.footer__brand p{margin:14px 0;line-height:1.7;max-width:260px}
.footer__social{display:flex;gap:14px}
.footer__social a{color:#b6b6c2}
.footer__social a:hover{color:var(--brand)}
.footer__col h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer__col ul li{margin-bottom:10px}
.footer__col a:hover{color:var(--brand)}
.footer__hotline{color:#fff;font-size:22px;font-weight:800;letter-spacing:.5px}
.footer__friends{columns:2}

.footer__pay{display:flex;align-items:center;gap:14px;padding-top:24px;padding-bottom:24px;flex-wrap:wrap;border-bottom:1px solid #34343f}
.pay-icons{display:flex;gap:10px;flex-wrap:wrap}
.pay-icon{background:#fff;color:#333;font-size:13px;font-weight:600;padding:6px 12px;border-radius:6px}
.pay-icon--wx{color:#07c160}.pay-icon--ali{color:#1677ff}.pay-icon--union{color:#e21e2c}
.pay-icon--visa{color:#1a1f71}.pay-icon--card{color:#ff5a5f}

.footer__bottom{padding:22px 0;text-align:center;font-size:13px;color:#8a8a97}
.footer__bottom p{margin:5px 0}
.footer__bottom a:hover{color:var(--brand)}

/* ===================== 提示 toast ===================== */
.toast{position:fixed;bottom:40px;left:50%;transform:translateX(-50%) translateY(30px);
  background:#2b2b33;color:#fff;padding:14px 26px;border-radius:999px;font-size:14px;font-weight:500;
  box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transition:.3s;z-index:999}
.toast.show{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}

/* ===================== 响应式 ===================== */
@media (max-width:1024px){
  .product-grid{grid-template-columns:repeat(3,1fr)}
  .footer__grid{grid-template-columns:1fr 1fr 1fr}
  .slide__title{font-size:34px}
}
@media (max-width:768px){
  .topbar{display:none}
  .header__inner{height:64px;gap:14px;flex-wrap:wrap}
  .search{order:3;flex-basis:100%;max-width:none;margin-bottom:10px;height:42px}
  .search__btn span{display:none}
  .header__actions{gap:16px}
  .icon-btn span{display:none}
  .hamburger{display:flex}
  .nav{position:fixed;top:0;left:0;bottom:0;width:78%;max-width:320px;background:#fff;z-index:200;
    transform:translateX(-100%);transition:.3s;box-shadow:var(--shadow-lg);overflow-y:auto;padding-top:20px}
  .nav.open{transform:translateX(0)}
  .nav__inner{flex-direction:column;height:auto;align-items:stretch}
  .cat{width:100%}
  .cat__toggle{border-radius:0;justify-content:flex-start}
  .cat__menu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;width:100%}
  .subcat{position:static;width:100%;opacity:1;visibility:visible;transform:none;box-shadow:none;
    grid-template-columns:1fr;padding:8px 18px 8px 34px;background:var(--bg)}
  .cat__item .subcat{display:none}
  .cat__item.open .subcat{display:grid}
  .nav__links{flex-direction:column;align-items:stretch;margin:10px 0 0}
  .nav__links a{height:48px;padding:0 20px;border-bottom:1px solid var(--line)}
  .nav__links a.active::after{display:none}
  .nav-mask{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:150;opacity:0;visibility:hidden;transition:.3s}
  .nav-mask.show{opacity:1;visibility:visible}

  .carousel{height:300px;border-radius:12px}
  .slide__content{padding:0 24px;max-width:100%}
  .slide__title{font-size:26px}
  .slide__desc{font-size:14px;margin-bottom:18px}
  .carousel__arrow{opacity:1;width:38px;height:38px}

  .features{grid-template-columns:1fr 1fr;gap:12px}
  .promo__inner{flex-direction:column;padding:30px 24px;text-align:center}
  .promo__title{font-size:26px}
  .promo__desc{font-size:14px}
  .countdown{justify-content:center}
  .countdown__item{min-width:52px}
  .countdown__item span{font-size:22px}
  .promo__price-card{width:100%;max-width:280px;margin:0 auto}

  .product-grid{grid-template-columns:1fr 1fr;gap:14px}
  .card__media{height:150px}
  .card__name{font-size:14px;min-height:40px}
  .card__price{font-size:20px}
  .add-cart{padding:8px 12px}

  .section-head__title{font-size:24px}
  .cta-band h2{font-size:24px}
  .footer__grid{grid-template-columns:1fr 1fr;gap:24px}
  .footer__brand{grid-column:1/-1}
}
@media (max-width:420px){
  .product-grid{grid-template-columns:1fr 1fr;gap:10px}
  .card__foot{flex-direction:column;align-items:stretch;gap:8px}
  .card__sold{text-align:center}
  .footer__grid{grid-template-columns:1fr}
}