/* ============================================
   home.css — 包印网商城 首页
   板块：① 首屏三栏(分类侧栏 + Banner主卡 + 右侧信息列)  ② 包装解决方案四宫格
        ③ 热销 TOP5 横向榜  ④ 为您推荐(不规则网格)  ⑤ 栏目专区(左图右列表·左右镜像)
        ⑥ 平台图文介绍(三段交错)  ⑦ 好物再推荐(横向滑动)  ⑧ 入驻商家
   配色：品牌墨蓝 #04539F + 亮蓝 #198DFB + 阳光橙 #F5871F + 暖纸白底 #F6F4F0
   类名前缀：by_h_
   ============================================ */

.by_h_home { background: var(--by-paper); }
.by_h_in { max-width: 1300px; margin: 0 auto; padding: 0 20px; }
.by_h_sec { padding: 50px 0; }
.by_h_sec_white { background: #fff; }

/* 区块标题 —— 左侧橙色竖标 + 墨蓝标题（不同于上一版的 eyebrow 大写小字） */
.by_h_head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.by_h_head_l { min-width: 0; display: flex; align-items: flex-start; gap: 14px; }
.by_h_head_bar { flex: 0 0 auto; width: 5px; height: 40px; margin-top: 3px; border-radius: 3px; background: var(--by-grad-orange); }
.by_h_title { font-size: 27px; font-weight: 800; color: var(--by-navy); line-height: 1.25; letter-spacing: .5px; }
.by_h_title span { color: var(--by-blue); }
.by_h_title em { font-style: normal; color: var(--by-orange-deep); }
.by_h_sub { font-size: 13px; color: var(--by-ink-3); margin-top: 7px; letter-spacing: .3px; }
.by_h_more { display: inline-flex; align-items: center; gap: 6px; flex-shrink: 0; height: 32px; padding: 0 15px; border: 1px solid var(--by-line); border-radius: var(--by-radius); background: #fff; font-size: 13px; font-weight: 600; color: var(--by-ink-2); transition: all .18s; }
.by_h_more:hover { border-color: var(--by-orange); background: var(--by-orange); color: #fff; }

/* ============================================
   ① 首屏 —— 分类侧栏 240 | Banner 主卡 | 右侧信息列 258
   ============================================ */
.by_h_hero { background: #fff; padding: 0 0 6px; }
.by_h_hero_in { max-width: 1300px; margin: 0 auto; padding: 0 20px 26px; display: grid; grid-template-columns: 240px 1fr 258px; gap: 16px; align-items: stretch; }

/* 左：常驻分类侧栏（紧接导航条上的橙色「全部商品分类」按钮） */
.by_h_side { background: #fff; border: 1px solid var(--by-line); border-top: none; border-radius: 0 0 var(--by-radius) var(--by-radius); display: flex; flex-direction: column; overflow: hidden; }
.by_h_side_link { display: flex; align-items: center; gap: 11px; height: 50px; padding: 0 17px; font-size: 14px; color: var(--by-ink); border-bottom: 1px dashed var(--by-line-soft); transition: all .16s; }
.by_h_side_link > i:first-child { width: 18px; text-align: center; font-size: 15px; color: var(--by-blue); flex-shrink: 0; }
.by_h_side_link .by_h_side_ar { margin-left: auto; font-size: 12px; color: var(--by-ink-3); transition: transform .18s; }
.by_h_side_link small { font-size: 11.5px; color: var(--by-ink-3); margin-left: 4px; }
.by_h_side_link:hover { background: var(--by-blue-tint); color: var(--by-blue-deep); padding-left: 21px; }
.by_h_side_link:hover > i:first-child { color: var(--by-orange-deep); }
.by_h_side_link:hover .by_h_side_ar { transform: translateX(3px); color: var(--by-orange); }
.by_h_side_tips { margin-top: auto; padding: 16px 17px 4px; display: flex; flex-direction: column; gap: 11px; }
.by_h_side_tips span { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--by-ink-3); }
.by_h_side_tips i { width: 14px; text-align: center; font-size: 12px; color: var(--by-orange); flex-shrink: 0; }
.by_h_side_foot { padding: 18px 17px; background: var(--by-blue-tint); border-top: 1px solid var(--by-line-blue); }
.by_h_side_foot small { display: block; font-size: 11.5px; color: var(--by-ink-3); }
.by_h_side_foot strong { display: block; margin-top: 4px; font-size: 19px; font-weight: 800; color: var(--by-blue-deep); letter-spacing: .3px; }
.by_h_side_btn { display: flex; align-items: center; justify-content: center; gap: 7px; margin-top: 13px; height: 38px; border-radius: var(--by-radius); background: var(--by-grad-orange); color: #fff; font-size: 13.5px; font-weight: 700; transition: filter .18s; }
.by_h_side_btn:hover { filter: brightness(1.08); color: #fff; }

/* 中：Banner 主卡（图在右、文案浮层在左） */
.by_h_hero_card { position: relative; min-height: 406px; border-radius: var(--by-radius-lg); overflow: hidden; background: var(--by-sky-tint); display: flex; align-items: center; }
.by_h_hero_card::before { content: ''; position: absolute; inset: 0; background-image: var(--by-hero-bg); background-size: cover; background-position: center right; }
.by_h_hero_card::after { content: ''; position: absolute; inset: 0; background: linear-gradient(96deg, rgba(255,255,255,.97) 0%, rgba(255,255,255,.92) 32%, rgba(255,255,255,.55) 56%, rgba(255,255,255,0) 80%); }
.by_h_hero_c { position: relative; z-index: 1; padding: 36px 40px; max-width: 60%; }
.by_h_hero_eyebrow { display: inline-flex; align-items: center; gap: 8px; background: var(--by-blue-deep); color: #fff; font-size: 12.5px; font-weight: 600; padding: 6px 14px; border-radius: var(--by-radius-sm); letter-spacing: .5px; }
.by_h_hero_eyebrow i { color: var(--by-orange-light); }
.by_h_hero_title { font-size: 40px; font-weight: 900; color: var(--by-navy); line-height: 1.15; letter-spacing: 1px; margin-top: 16px; }
.by_h_hero_title span { color: var(--by-blue); }
.by_h_hero_slogan { display: flex; align-items: center; flex-wrap: wrap; gap: 8px 10px; margin-top: 14px; }
.by_h_hero_slogan b { font-size: 14px; font-weight: 700; color: var(--by-orange-deep); background: var(--by-orange-tint); border: 1px solid var(--by-orange-soft); border-radius: var(--by-radius-sm); padding: 4px 12px; letter-spacing: .5px; }
.by_h_hero_desc { font-size: 13.5px; line-height: 1.95; color: var(--by-ink-2); margin-top: 15px; max-width: 460px; }
.by_h_hero_search { display: flex; align-items: stretch; height: 48px; max-width: 440px; margin-top: 22px; background: #fff; border: 2px solid var(--by-blue); border-radius: var(--by-radius); overflow: hidden; box-shadow: var(--by-shadow); }
.by_h_hero_search input { flex: 1; border: none; outline: none; background: transparent; padding: 0 10px 0 18px; font-size: 14px; color: var(--by-ink); font-family: inherit; min-width: 0; }
.by_h_hero_search input::placeholder { color: var(--by-ink-3); }
.by_h_hero_search button { flex-shrink: 0; display: inline-flex; align-items: center; gap: 7px; padding: 0 24px; border: none; cursor: pointer; background: var(--by-grad-orange); color: #fff; font-size: 14.5px; font-weight: 700; transition: filter .2s; }
.by_h_hero_search button:hover { filter: brightness(1.07); }
.by_h_hero_hot { display: flex; align-items: center; flex-wrap: wrap; gap: 7px 10px; margin-top: 13px; font-size: 12.5px; }
.by_h_hero_hot > span { color: var(--by-ink-3); }
.by_h_hero_hot a { color: var(--by-ink-2); padding: 3px 11px; background: #fff; border: 1px solid var(--by-line); border-radius: var(--by-radius-sm); transition: all .16s; }
.by_h_hero_hot a:hover { background: var(--by-blue); border-color: var(--by-blue); color: #fff; }

/* 右：信息列（用户卡 + 平台公告 + 数据） */
.by_h_rail { display: flex; flex-direction: column; gap: 12px; }
.by_h_user { background: #fff; border: 1px solid var(--by-line); border-radius: var(--by-radius); padding: 18px 16px; text-align: center; }
.by_h_user_av { width: 52px; height: 52px; margin: 0 auto 10px; border-radius: 50%; background: var(--by-grad-blue); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 22px; }
.by_h_user_hi { font-size: 13.5px; color: var(--by-ink); font-weight: 600; }
.by_h_user_hi b { color: var(--by-blue-deep); }
.by_h_user_tip { font-size: 12px; color: var(--by-ink-3); margin-top: 5px; }
.by_h_user_btns { display: flex; gap: 8px; margin-top: 13px; }
.by_h_user_btns a { flex: 1; height: 34px; display: inline-flex; align-items: center; justify-content: center; border-radius: var(--by-radius-sm); font-size: 13px; font-weight: 600; transition: all .18s; }
.by_h_user_b1 { background: var(--by-grad-orange); color: #fff; }
.by_h_user_b1:hover { filter: brightness(1.08); color: #fff; }
.by_h_user_b2 { border: 1px solid var(--by-line); color: var(--by-ink-2); }
.by_h_user_b2:hover { border-color: var(--by-blue); color: var(--by-blue); }

.by_h_ann { flex: 1 1 auto; background: #fff; border: 1px solid var(--by-line); border-radius: var(--by-radius); padding: 14px 16px; min-height: 0; }
.by_h_ann_hd { display: flex; align-items: center; gap: 7px; font-size: 13.5px; font-weight: 700; color: var(--by-navy); padding-bottom: 10px; border-bottom: 1px solid var(--by-line-soft); }
.by_h_ann_hd i { color: var(--by-orange); }
.by_h_ann_li { display: flex; align-items: flex-start; gap: 7px; font-size: 12.5px; line-height: 1.75; color: var(--by-ink-2); padding: 9px 0; border-bottom: 1px dashed var(--by-line-soft); }
.by_h_ann_li:last-child { border-bottom: none; padding-bottom: 0; }
.by_h_ann_li i { font-size: 5px; color: var(--by-orange); margin-top: 8px; flex-shrink: 0; }

.by_h_nums { display: grid; grid-template-columns: repeat(3, 1fr); background: var(--by-navy); border-radius: var(--by-radius); overflow: hidden; }
.by_h_num { padding: 14px 4px; text-align: center; position: relative; }
.by_h_num + .by_h_num::before { content: ''; position: absolute; left: 0; top: 22%; bottom: 22%; width: 1px; background: rgba(255,255,255,.14); }
.by_h_num b { display: block; font-size: 22px; font-weight: 900; color: #fff; line-height: 1; }
.by_h_num b i { font-size: 12px; font-style: normal; color: var(--by-orange-light); margin-left: 1px; }
.by_h_num span { display: block; margin-top: 6px; font-size: 11.5px; color: rgba(255,255,255,.58); }

/* ============================================
   ② 包装解决方案 —— 大图卡 + 2×2 小卡
   ============================================ */
.by_h_solu { display: grid; grid-template-columns: 1.22fr 1fr 1fr; grid-auto-rows: 1fr; gap: 14px; }
.by_h_solu_big { grid-row: span 2; position: relative; overflow: hidden; border-radius: var(--by-radius-lg); background: var(--by-navy); min-height: 300px; display: flex; flex-direction: column; justify-content: flex-end; padding: 26px; }
.by_h_solu_big img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.by_h_solu_big::after { content: ''; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(6,32,64,.92) 0%, rgba(6,32,64,.45) 46%, rgba(6,32,64,.05) 100%); }
.by_h_solu_big_c { position: relative; z-index: 1; }
.by_h_solu_big_tag { display: inline-flex; align-items: center; gap: 7px; font-size: 12px; font-weight: 600; color: #fff; background: var(--by-orange); border-radius: var(--by-radius-sm); padding: 4px 11px; }
.by_h_solu_big h3 { font-size: 24px; font-weight: 800; color: #fff; line-height: 1.35; margin-top: 13px; letter-spacing: .5px; }
.by_h_solu_big p { font-size: 13px; line-height: 1.8; color: rgba(255,255,255,.76); margin-top: 9px; }
.by_h_solu_big_btn { display: inline-flex; align-items: center; gap: 7px; margin-top: 16px; height: 38px; padding: 0 20px; border-radius: var(--by-radius); background: #fff; color: var(--by-blue-deep); font-size: 13.5px; font-weight: 700; transition: transform .18s; }
.by_h_solu_big_btn:hover { transform: translateX(4px); color: var(--by-blue-deep); }

.by_h_solu_card { position: relative; overflow: hidden; background: #fff; border: 1px solid var(--by-line); border-radius: var(--by-radius-lg); padding: 22px; min-height: 143px; display: flex; flex-direction: column; justify-content: center; transition: all .2s; }
.by_h_solu_card::after { content: ''; position: absolute; right: -26px; bottom: -26px; width: 100px; height: 100px; border-radius: 50%; background: var(--by-blue-tint); transition: all .25s; }
.by_h_solu_card:hover { border-color: var(--by-orange); box-shadow: var(--by-shadow); transform: translateY(-3px); }
.by_h_solu_card:hover::after { background: var(--by-orange-tint); transform: scale(1.15); }
.by_h_solu_card_ic { position: relative; z-index: 1; width: 44px; height: 44px; border-radius: var(--by-radius); background: var(--by-grad-blue); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-size: 19px; }
.by_h_solu_card:hover .by_h_solu_card_ic { background: var(--by-grad-orange); }
.by_h_solu_card strong { position: relative; z-index: 1; display: block; margin-top: 13px; font-size: 16px; font-weight: 700; color: var(--by-ink); }
.by_h_solu_card span { position: relative; z-index: 1; display: block; margin-top: 6px; font-size: 12.5px; line-height: 1.7; color: var(--by-ink-3); }

/* ============================================
   ③ 热销 TOP5 —— 横向排行卡（大号排名水印，TOP1 橙）
   ============================================ */
.by_h_rank { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.by_h_rcard { position: relative; overflow: hidden; background: #fff; border: 1px solid var(--by-line); border-radius: var(--by-radius-lg); padding: 18px 16px 16px; transition: all .2s; }
.by_h_rcard:hover { border-color: var(--by-blue); box-shadow: var(--by-shadow); transform: translateY(-4px); }
.by_h_rcard_no { position: absolute; top: 8px; right: 10px; font-size: 62px; font-weight: 900; font-style: italic; line-height: 1; color: var(--by-paper-2); letter-spacing: -3px; }
.by_h_rcard_badge { position: relative; z-index: 1; display: inline-flex; align-items: center; gap: 5px; height: 22px; padding: 0 10px; border-radius: var(--by-radius-sm); background: var(--by-blue-tint); color: var(--by-blue-deep); font-size: 11.5px; font-weight: 700; letter-spacing: .5px; }
.by_h_rcard_1 .by_h_rcard_no { color: var(--by-orange-tint); }
.by_h_rcard_1 .by_h_rcard_badge { background: var(--by-grad-orange); color: #fff; }
.by_h_rcard_img { position: relative; z-index: 1; display: block; height: 138px; margin: 12px 0 12px; background: var(--by-paper); border-radius: var(--by-radius); overflow: hidden; }
.by_h_rcard_img img { width: 100%; height: 100%; object-fit: contain; padding: 8px; transition: transform .3s; }
.by_h_rcard:hover .by_h_rcard_img img { transform: scale(1.06); }
.by_h_rcard_name { position: relative; z-index: 1; font-size: 13.5px; line-height: 1.6; color: var(--by-ink); height: 43px; overflow: hidden; }
.by_h_rcard_ft { position: relative; z-index: 1; display: flex; align-items: baseline; justify-content: space-between; gap: 8px; margin-top: 10px; }
.by_h_rcard_price { font-size: 19px; font-weight: 800; color: var(--by-orange-deep); }
.by_h_rcard_price::before { content: '¥'; font-size: 12px; margin-right: 1px; }
.by_h_rcard_sales { font-size: 11.5px; color: var(--by-ink-3); }

/* ============================================
   ④ 为您推荐 —— 不规则网格（1 大卡 + N 小卡）
   卡片本体定义在 app.css 的 .by_pcard（全站共用）
   ============================================ */
.by_h_rec { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
/* ============================================
   ⑤ 栏目专区 —— 左图右列表（左右镜像交替）
   ============================================ */
.by_h_zone { display: grid; grid-template-columns: 318px 1fr; gap: 16px; align-items: stretch; }
.by_h_zone_rev { grid-template-columns: 1fr 318px; }
.by_h_zone_rev .by_h_zone_cover { order: 2; }

.by_h_zone_cover { position: relative; overflow: hidden; border-radius: var(--by-radius-lg); background: var(--by-navy); min-height: 340px; display: flex; flex-direction: column; justify-content: flex-end; padding: 26px 24px; }
.by_h_zone_cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.by_h_zone_cover::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(4,83,159,.62) 0%, rgba(6,32,64,.9) 100%); }
.by_h_zone_cover_c { position: relative; z-index: 1; }
.by_h_zone_ic { width: 46px; height: 46px; border-radius: var(--by-radius); background: rgba(255,255,255,.16); border: 1px solid rgba(255,255,255,.26); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-size: 20px; }
.by_h_zone_cover h3 { font-size: 23px; font-weight: 800; color: #fff; margin-top: 14px; letter-spacing: .5px; }
.by_h_zone_cover p { font-size: 12.5px; line-height: 1.85; color: rgba(255,255,255,.72); margin-top: 9px; }
.by_h_zone_cover_meta { display: flex; align-items: center; gap: 14px; margin-top: 14px; font-size: 12px; color: rgba(255,255,255,.62); }
.by_h_zone_cover_meta span { display: inline-flex; align-items: center; gap: 5px; }
.by_h_zone_cover_meta i { color: var(--by-orange-light); }
.by_h_zone_btn { display: inline-flex; align-items: center; gap: 7px; margin-top: 18px; height: 38px; padding: 0 20px; border-radius: var(--by-radius); background: var(--by-grad-orange); color: #fff; font-size: 13.5px; font-weight: 700; transition: transform .18s; }
.by_h_zone_btn:hover { transform: translateX(4px); color: #fff; }

.by_h_zone_grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }

/* ============================================
   ⑥ 平台图文介绍 —— 三段左右交错
   ============================================ */
.by_h_intro { display: flex; flex-direction: column; gap: 18px; }
.by_h_intro_row { display: grid; grid-template-columns: 1fr 1fr; gap: 0; background: #fff; border: 1px solid var(--by-line); border-radius: var(--by-radius-lg); overflow: hidden; }
.by_h_intro_row_rev .by_h_intro_fig { order: 2; }
.by_h_intro_fig { position: relative; min-height: 268px; overflow: hidden; background: var(--by-blue-tint); }
.by_h_intro_fig img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.by_h_intro_fig::after { content: ''; position: absolute; left: 0; top: 0; z-index: 1; width: 170px; height: 120px; background: linear-gradient(132deg, rgba(6,32,64,.55) 0%, rgba(6,32,64,.18) 52%, transparent 78%); pointer-events: none; }
.by_h_intro_fig_no { position: absolute; left: 22px; top: 18px; z-index: 2; font-size: 56px; font-weight: 900; font-style: italic; color: rgba(255,255,255,.62); line-height: 1; letter-spacing: -2px; text-shadow: 0 2px 12px rgba(6,32,64,.45); }

/* 第三段：无实拍图，用图标网格 */
.by_h_intro_ico { position: absolute; inset: 0; background: var(--by-grad-navy); display: grid; grid-template-columns: repeat(2, 1fr); align-content: center; gap: 14px; padding: 26px; }
.by_h_intro_ico div { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 9px; padding: 14px 6px; border: 1px solid rgba(255,255,255,.14); border-radius: var(--by-radius); background: rgba(255,255,255,.05); }
.by_h_intro_ico i { font-size: 20px; color: var(--by-orange-light); }
.by_h_intro_ico span { font-size: 12.5px; color: rgba(255,255,255,.8); }

.by_h_intro_tx { padding: 32px 34px; display: flex; flex-direction: column; justify-content: center; }
.by_h_intro_tag { display: inline-flex; align-self: flex-start; align-items: center; gap: 7px; height: 25px; padding: 0 12px; border-radius: var(--by-radius-sm); background: var(--by-blue-tint); color: var(--by-blue-deep); font-size: 12px; font-weight: 700; letter-spacing: .5px; }
.by_h_intro_tx h3 { font-size: 21px; font-weight: 800; color: var(--by-navy); margin-top: 14px; letter-spacing: .5px; }
.by_h_intro_tx p { font-size: 13.5px; line-height: 2; color: var(--by-ink-2); margin-top: 12px; }
.by_h_intro_pts { display: flex; flex-wrap: wrap; gap: 8px 10px; margin-top: 16px; }
.by_h_intro_pts span { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; color: var(--by-ink-2); background: var(--by-paper); border: 1px solid var(--by-line); border-radius: var(--by-radius-sm); padding: 5px 12px; }
.by_h_intro_pts i { color: var(--by-orange); font-size: 11px; }

/* ============================================
   ⑦ 好物再推荐 —— 横向滑动
   ============================================ */
.by_h_scroll_wrap { position: relative; }
.by_h_scroll { display: flex; gap: 14px; overflow-x: auto; padding-bottom: 10px; scroll-behavior: smooth; }
.by_h_scroll::-webkit-scrollbar { height: 6px; }
.by_h_scroll::-webkit-scrollbar-track { background: var(--by-paper-2); border-radius: 3px; }
.by_h_scroll::-webkit-scrollbar-thumb { background: var(--by-blue-soft); border-radius: 3px; }
.by_h_scroll::-webkit-scrollbar-thumb:hover { background: var(--by-blue); }
.by_h_scard { flex: 0 0 218px; display: flex; flex-direction: column; background: #fff; border: 1px solid var(--by-line); border-radius: var(--by-radius-lg); overflow: hidden; transition: all .2s; }
.by_h_scard:hover { border-color: var(--by-orange); box-shadow: var(--by-shadow); transform: translateY(-3px); }
.by_h_scard_img { height: 160px; background: var(--by-paper); overflow: hidden; }
.by_h_scard_img img { width: 100%; height: 100%; object-fit: contain; padding: 10px; }
.by_h_scard_bd { padding: 12px 14px 14px; border-top: 1px solid var(--by-line-soft); }
.by_h_scard_name { font-size: 13px; line-height: 1.6; color: var(--by-ink); height: 41px; overflow: hidden; }
.by_h_scard_ft { display: flex; align-items: baseline; justify-content: space-between; gap: 6px; margin-top: 10px; }
.by_h_scard_price { font-size: 17px; font-weight: 800; color: var(--by-orange-deep); }
.by_h_scard_price::before { content: '¥'; font-size: 11px; margin-right: 1px; }
.by_h_scard_m { font-size: 11.5px; color: var(--by-ink-3); }

/* ============================================
   ⑧ 入驻商家
   ============================================ */
.by_h_merch { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.by_h_mcard { display: flex; flex-direction: column; align-items: center; text-align: center; background: #fff; border: 1px solid var(--by-line); border-radius: var(--by-radius-lg); padding: 22px 16px 18px; transition: all .2s; }
.by_h_mcard:hover { border-color: var(--by-blue); box-shadow: var(--by-shadow); transform: translateY(-4px); }
.by_h_mcard_logo { width: 62px; height: 62px; border-radius: var(--by-radius); overflow: hidden; background: var(--by-blue-tint); color: var(--by-blue); display: inline-flex; align-items: center; justify-content: center; font-size: 24px; }
.by_h_mcard_logo img { width: 100%; height: 100%; object-fit: cover; }
.by_h_mcard_name { margin-top: 13px; font-size: 14.5px; font-weight: 700; color: var(--by-ink); }
.by_h_mcard_meta { margin-top: 8px; display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 6px 10px; font-size: 11.5px; color: var(--by-ink-3); }
.by_h_mcard_badge { display: inline-flex; align-items: center; gap: 4px; color: #1F9D55; }
.by_h_mcard_btn { margin-top: 14px; width: 100%; height: 34px; display: inline-flex; align-items: center; justify-content: center; gap: 6px; border: 1px solid var(--by-line); border-radius: var(--by-radius); font-size: 13px; font-weight: 600; color: var(--by-ink-2); transition: all .18s; }
.by_h_mcard:hover .by_h_mcard_btn { background: var(--by-blue); border-color: var(--by-blue); color: #fff; }
.by_h_mcard_join { background: var(--by-blue-tint); border-style: dashed; border-color: var(--by-blue-soft); }
.by_h_mcard_join .by_h_mcard_logo { background: #fff; color: var(--by-orange); }
.by_h_mcard_join:hover { border-color: var(--by-orange); background: var(--by-orange-tint); }
.by_h_mcard_join:hover .by_h_mcard_btn { background: var(--by-orange); border-color: var(--by-orange); }

/* 空态 */
.by_h_empty { grid-column: 1 / -1; padding: 60px 20px; text-align: center; background: #fff; border: 1px dashed var(--by-line); border-radius: var(--by-radius-lg); }
.by_h_empty i { font-size: 38px; color: var(--by-line); }
.by_h_empty h3 { font-size: 15px; font-weight: 600; color: var(--by-ink-3); margin-top: 14px; }

/* ============================================
   响应式
   ============================================ */
@media (max-width: 1200px) {
    .by_h_hero_in { grid-template-columns: 200px 1fr; }
    .by_h_rail { display: none; }
    .by_h_hero_c { max-width: 68%; }
    .by_h_rank { grid-template-columns: repeat(4, 1fr); }
    .by_h_rank > :nth-child(5) { display: none; }
    .by_h_merch { grid-template-columns: repeat(4, 1fr); }
    .by_h_zone { grid-template-columns: 260px 1fr; }
    .by_h_zone_rev { grid-template-columns: 1fr 260px; }
    .by_h_zone_grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 992px) {
    .by_h_sec { padding: 38px 0; }
    .by_h_hero_in { grid-template-columns: 1fr; padding-bottom: 18px; }
    .by_h_side { display: none; }
    .by_h_hero_card { min-height: 330px; }
    .by_h_hero_c { max-width: 78%; padding: 28px; }
    .by_h_hero_title { font-size: 30px; }
    .by_h_solu { grid-template-columns: 1fr 1fr; }
    .by_h_solu_big { grid-row: span 1; grid-column: span 2; min-height: 220px; }
    .by_h_rank { grid-template-columns: repeat(3, 1fr); }
    .by_h_rank > :nth-child(4), .by_h_rank > :nth-child(5) { display: none; }
    .by_h_rec { grid-template-columns: repeat(3, 1fr); }
    .by_pcard_big { grid-column: span 3; grid-row: span 1; }
    .by_pcard_big .by_pcard_img { min-height: 210px; }
    .by_h_zone, .by_h_zone_rev { grid-template-columns: 1fr; }
    .by_h_zone_rev .by_h_zone_cover { order: 0; }
    .by_h_zone_cover { min-height: 200px; }
    .by_h_intro_row, .by_h_intro_row_rev { grid-template-columns: 1fr; }
    .by_h_intro_row_rev .by_h_intro_fig { order: 0; }
    .by_h_intro_fig { min-height: 200px; }
    .by_h_intro_tx { padding: 26px 24px; }
    .by_h_merch { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .by_h_in { padding: 0 14px; }
    .by_h_sec { padding: 28px 0; }
    .by_h_hero_in { padding: 14px 14px 14px; }
    .by_h_hero_card { min-height: 0; }
    .by_h_hero_card::after { background: linear-gradient(180deg, rgba(255,255,255,.96) 0%, rgba(255,255,255,.9) 62%, rgba(255,255,255,.55) 100%); }
    .by_h_hero_c { max-width: 100%; padding: 22px 18px 24px; }
    .by_h_hero_title { font-size: 25px; }
    .by_h_hero_desc { font-size: 13px; }
    .by_h_hero_search { height: 44px; }
    .by_h_hero_search button { padding: 0 16px; }
    .by_h_title { font-size: 21px; }
    .by_h_head_bar { height: 32px; }
    .by_h_solu { grid-template-columns: 1fr 1fr; gap: 10px; }
    .by_h_solu_card { padding: 16px; min-height: 0; }
    .by_h_rank { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .by_h_rank > :nth-child(3) { display: none; }
    .by_h_rcard_img { height: 108px; }
    .by_h_rec { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .by_pcard_big { grid-column: span 2; }
    .by_pcard_big .by_pcard_img { min-height: 170px; }
    .by_pcard_img { height: 142px; }
    .by_h_zone_grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .by_h_merch { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .by_h_intro_tx h3 { font-size: 18px; }
}

/* ============================================
   首页专属：导航条上的「全部商品分类」悬停面板 → 首页改为首屏常驻侧栏，
   隐藏悬停下拉，避免与 .by_h_side 重复
   ============================================ */
.by_nav_home .by_catpanel { display: none !important; }
.by_nav_home .by_allcat:hover .by_allcat_ar { transform: none; }