/* 选品库 V2 卡片（本地样板，未接入正式页面）。
   六个页面各一种卡片，共用同一个外壳：整张卡可点、图片放在浅灰圆角底上、名字最多两行，
   中间是这一页真正要看的那个数字。所有规则都挂在 .lv2 下，不碰站内其他地方。 */
.lv2{--lv2-tile:color-mix(in srgb,var(--ink) 4%,var(--bg));--lv2-plate:color-mix(in srgb,var(--ink) 4.5%,var(--bg));--lv2-soft:color-mix(in srgb,var(--ink) 9%,var(--bg));--lv2-up:var(--accent);--lv2-ease:cubic-bezier(.2,.8,.2,1);--lv2-spring:var(--spring,cubic-bezier(.34,1.56,.64,1));--lv2-spring-soft:var(--spring-soft,cubic-bezier(.2,.8,.2,1))}
.lv2 :where(button){all:unset;box-sizing:border-box;cursor:pointer}
.lv2 svg{fill:none;stroke:none}

/* ---------- 网格 ---------- */
.lv2-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(232px,1fr));gap:32px 20px;margin:0;padding:0;list-style:none}

/* ---------- 卡片外壳 ---------- */
.lv2-card{position:relative;display:flex;flex-direction:column;min-width:0;isolation:isolate;color:var(--ink);transition:transform .5s var(--lv2-spring-soft)}
.lv2-card::before{content:"";position:absolute;inset:-10px -10px -12px;z-index:-1;border-radius:28px;background:var(--lv2-plate);opacity:0;transform:scale(.94);transition:opacity .22s ease,transform .5s var(--lv2-spring-soft);pointer-events:none}
@media(hover:hover){.lv2-card:hover{transform:translateY(-3px)}.lv2-card:hover::before{opacity:1;transform:none}}
.lv2-card:active{transform:scale(.985);transition-duration:.12s}
.lv2-hit{position:absolute;inset:0;z-index:1;border-radius:20px}
.lv2-hit:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
.lv2-photo{position:relative;aspect-ratio:1/1;margin:0 0 14px;padding:16px;border-radius:18px;background:var(--lv2-tile);overflow:hidden}
.lv2-photo img{display:block;width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply}
:root[data-theme=dark] .lv2-photo{background:#e8e8ec}
.lv2-card h3{margin:0;font-size:15px;font-weight:600;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.9em}
.lv2-meta{margin:6px 0 0;font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lv2-foot{display:flex;justify-content:space-between;gap:8px;margin-top:12px;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.lv2-foot b{font-weight:600;color:var(--ink)}

/* 大数字：这一页的主角 */
.lv2-hero{display:flex;align-items:baseline;gap:6px;margin-top:12px;font-variant-numeric:tabular-nums;line-height:1}
.lv2-hero b{font-size:34px;font-weight:700;letter-spacing:-.02em}
.lv2-hero span{font-size:15px;font-weight:600}
.lv2-label{display:block;margin-top:12px;font-size:13px;color:var(--muted)}
.lv2-label+.lv2-hero{margin-top:6px}
.lv2-hero.is-missing b{color:var(--muted)}

/* “?” 读数说明：卡面不放免责小字，都收在这里 */
.lv2-tools{position:absolute;top:10px;right:10px;z-index:2;display:flex;gap:6px}
.lv2-help{position:relative;display:grid;place-items:center;width:28px;height:28px;border-radius:999px;background:color-mix(in srgb,#fff 82%,transparent);color:#000;font-size:14px;font-weight:600;transition:transform .4s var(--lv2-spring),background-color .2s ease}
.lv2 .lv2-help:hover{background:#fff}
.lv2 .lv2-help:active{transform:scale(.88)}
.lv2 .lv2-help:focus-visible{outline:2px solid #000;outline-offset:2px}
.lv2-pop{position:absolute;top:44px;right:6px;left:6px;z-index:3;padding:14px 16px;border-radius:16px;background:var(--bg);color:var(--ink);box-shadow:0 12px 32px rgba(0,0,0,.14),0 0 0 1px var(--line);font-size:13px;line-height:1.55;transform-origin:calc(100% - 18px) -8px;opacity:0;transform:scale(.9) translateY(-4px);pointer-events:none;transition:opacity .16s ease,transform .45s var(--lv2-spring)}
.lv2-pop.is-open{opacity:1;transform:none;pointer-events:auto}
.lv2-pop p{margin:0}
.lv2-pop p+p{margin-top:8px}
:root[data-theme=dark] .lv2-pop{background:#1c1c1e;box-shadow:0 12px 32px rgba(0,0,0,.6),0 0 0 1px rgba(255,255,255,.08)}

/* 唯一的状态标签 */
.lv2-tag{align-self:flex-start;margin-top:10px;padding:3px 10px;border-radius:999px;font-size:12px;font-weight:600;background:var(--lv2-soft);color:var(--muted)}

/* ---------- 热销：Amazon 排名的 24 小时升降 ---------- */
.lv2-move{display:inline-flex;align-items:center;gap:3px;margin-left:4px;padding:3px 8px;border-radius:999px;background:var(--lv2-soft);font-size:12px;font-weight:600;color:var(--muted);transform:translateY(-6px)}
.lv2-move svg{width:10px;height:10px;stroke:currentColor;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.lv2-move.is-up{background:color-mix(in srgb,var(--lv2-up) 13%,var(--bg));color:var(--lv2-up)}

/* ---------- 增长：整条走势线 ---------- */
.lv2-spark-wrap{position:relative;margin-top:14px}
.lv2-spark{display:block;width:100%;height:56px;overflow:visible}
.lv2-spark .line{stroke:var(--ink);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;vector-effect:non-scaling-stroke}
.lv2-spark .area{fill:color-mix(in srgb,var(--ink) 6%,transparent)}
.lv2-dot{position:absolute;width:9px;height:9px;margin:-4.5px 0 0 -4.5px;border-radius:999px;background:var(--lv2-up);box-shadow:0 0 0 3px var(--bg)}
.lv2-spark .base{stroke:var(--line);stroke-width:1;vector-effect:non-scaling-stroke}

/* ---------- 流量：视频封面 ---------- */
.lv2-video .lv2-photo{aspect-ratio:4/5;padding:0;background:#111}
.lv2-video .lv2-photo img{mix-blend-mode:normal;object-fit:cover}
.lv2-video .lv2-photo.is-fallback{padding:28px 16px 56px;background:var(--lv2-tile)}
.lv2-video .lv2-photo.is-fallback img{object-fit:contain;mix-blend-mode:multiply}
:root[data-theme=dark] .lv2-video .lv2-photo.is-fallback{background:#e8e8ec}
.lv2-play{position:absolute;left:50%;top:50%;z-index:2;display:grid;place-items:center;width:60px;height:60px;margin:-30px 0 0 -30px;border-radius:999px;background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.18);transition:transform .45s var(--lv2-spring)}
.lv2-play svg{width:22px;height:22px;margin-left:3px;fill:#000}
@media(hover:hover){.lv2-video:hover .lv2-play{transform:scale(1.08)}}
.lv2-video .lv2-play:active{transform:scale(.9)}
.lv2-play:focus-visible{outline:2px solid #fff;outline-offset:3px}
.lv2-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:12px 0 0;font-variant-numeric:tabular-nums}
.lv2-stats div{min-width:0}
.lv2-stats dt{font-size:12px;color:var(--muted)}
.lv2-stats dd{margin:4px 0 0;font-size:17px;font-weight:700;white-space:nowrap}
.lv2-stats div:first-child dd{font-size:22px;line-height:1.05}

/* ---------- 差价：两根对比条 ---------- */
.lv2-bars{display:grid;gap:8px;margin-top:14px}
.lv2-bar{display:grid;grid-template-columns:4.6em 1fr auto;align-items:center;gap:8px;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.lv2-bar i{display:block;height:10px;border-radius:999px;background:var(--lv2-soft);overflow:hidden}
.lv2-bar i::after{content:"";display:block;height:100%;width:calc(var(--w,0)*100%);border-radius:inherit;background:var(--ink);transform-origin:left;transition:transform .9s var(--lv2-spring-soft)}
.lv2-bar.is-cost i::after{background:color-mix(in srgb,var(--ink) 38%,var(--bg))}
.lv2-bar em{font-style:normal;font-weight:600;color:var(--ink);min-width:4.2em;text-align:right}

/* ---------- 低价货源：零售图和货源图对照 ---------- */
.lv2-pair{display:grid;grid-template-columns:1fr 1fr;gap:4px;aspect-ratio:2/1.12;padding:0;background:none}
:root[data-theme=dark] .lv2-pair{background:none}
.lv2-pair figure{position:relative;margin:0;padding:10px 10px 30px;border-radius:14px;background:var(--lv2-tile);overflow:hidden}
.lv2-pair figure:first-child{border-radius:18px 8px 8px 18px}
.lv2-pair figure:last-child{border-radius:8px 18px 18px 8px}
:root[data-theme=dark] .lv2-pair figure{background:#e8e8ec}
.lv2-pair img{display:block;width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply}
.lv2-pair figcaption{position:absolute;left:0;right:0;bottom:8px;font-size:12px;text-align:center;color:#6b6b6b}

/* ---------- 可以动手：三格 ---------- */

/* ---------- 空页 ---------- */
.lv2-empty{max-width:520px;padding:48px 0;font-size:15px;line-height:1.6;color:var(--muted)}
.lv2-empty b{display:block;margin-bottom:8px;font-size:18px;font-weight:600;color:var(--ink)}

/* ---------- 站内播放器 ---------- */
.lv2-player{width:min(420px,calc(100vw - 32px));max-height:calc(100dvh - 48px);padding:0;border:0;border-radius:24px;background:#000;color:#fff;overflow:hidden;opacity:0;transform:scale(.94);transition:opacity .2s ease,transform .5s var(--lv2-spring),overlay .3s allow-discrete,display .3s allow-discrete}
.lv2-player[open]{opacity:1;transform:none}
@starting-style{.lv2-player[open]{opacity:0;transform:scale(.94)}}
.lv2-player::backdrop{background:rgba(0,0,0,.6);opacity:0;transition:opacity .25s ease,overlay .3s allow-discrete,display .3s allow-discrete}
.lv2-player[open]::backdrop{opacity:1}
@starting-style{.lv2-player[open]::backdrop{opacity:0}}
.lv2-frame{position:relative;aspect-ratio:9/16;max-height:calc(100dvh - 140px);margin:0 auto}
.lv2-frame iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.lv2-frame .lv2-wait{position:absolute;inset:0;display:grid;place-content:center;gap:8px;padding:32px;text-align:center;font-size:15px;line-height:1.6;color:#d4d4d4}
.lv2-frame .lv2-wait b{font-size:17px;color:#fff}
.lv2-player-bar{display:flex;align-items:center;gap:12px;padding:14px 16px;font-size:13px;color:#bdbdbd;font-variant-numeric:tabular-nums}
.lv2-player-bar span{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lv2 .lv2-close,.lv2-player .lv2-close{all:unset;box-sizing:border-box;display:grid;place-items:center;width:32px;height:32px;border-radius:999px;background:#2a2a2a;color:#fff;cursor:pointer;transition:transform .4s var(--lv2-spring)}
.lv2-player .lv2-close:active{transform:scale(.88)}
.lv2-player .lv2-close svg{width:14px;height:14px;fill:none;stroke:#fff;stroke-width:2.2;stroke-linecap:round}

/* ---------- 进场动效（脚本在卡片进入视线时加 .is-in） ---------- */
.lv2-anim .lv2-card{opacity:0;transform:translateY(14px)}
.lv2-anim .lv2-card.is-in{opacity:1;transform:none;transition:opacity .4s ease var(--d,0s),transform .7s var(--lv2-spring-soft) var(--d,0s)}
.lv2-anim .lv2-bar i::after{transform:scaleX(0)}
.lv2-anim .is-in .lv2-bar i::after{transform:none;transition-delay:calc(var(--d,0s) + .15s)}
.lv2-anim .is-in .lv2-bar.is-cost i::after{transition-delay:calc(var(--d,0s) + .27s)}
.lv2-anim .lv2-spark{clip-path:inset(-4px 100% -4px 0)}
.lv2-anim .is-in .lv2-spark{clip-path:inset(-4px 0 -4px 0);transition:clip-path 1s cubic-bezier(.45,0,.2,1) calc(var(--d,0s) + .1s)}
.lv2-anim .lv2-dot{transform:scale(0)}
.lv2-anim .is-in .lv2-dot{transform:none;transition:transform .55s var(--lv2-spring) calc(var(--d,0s) + 1.05s)}
.lv2-anim .lv2-move{opacity:0;transform:translateY(0) scale(.7)}
.lv2-anim .is-in .lv2-move{opacity:1;transform:translateY(-6px);transition:opacity .2s ease calc(var(--d,0s) + .55s),transform .55s var(--lv2-spring) calc(var(--d,0s) + .55s)}
@media(prefers-reduced-motion:reduce){
 .lv2-anim .lv2-card,.lv2-anim .lv2-move{opacity:1!important;transform:none!important;transition:none!important}
 .lv2-anim .lv2-bar i::after,.lv2-anim .lv2-dot{transform:none!important;transition:none!important}
 .lv2-anim .lv2-spark{clip-path:none!important;transition:none!important}
}

/* ---------- 手机 ---------- */
@media(max-width:600px){
 .lv2-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px 12px}
 .lv2-photo{padding:10px;border-radius:14px;margin-bottom:10px}
 .lv2-card h3{font-size:14px}
 .lv2-hero b{font-size:26px}
 .lv2-hero span{font-size:13px}
 .lv2-stats dd{font-size:14px}
 .lv2-stats div:first-child dd{font-size:17px}
 .lv2-bar{grid-template-columns:1fr auto;row-gap:4px}
 .lv2-bar i{grid-column:1/-1;grid-row:2;height:8px}
 .lv2-pair figure{padding:8px 6px 24px}
 .lv2-play{width:48px;height:48px;margin:-24px 0 0 -24px}
 .lv2-foot{flex-direction:column;gap:2px}
}

/* ---------- 下单状态：能下单标绿，研究数据标灰 ---------- */
.lv2-tag.is-ok{background:color-mix(in srgb,var(--lv2-up) 12%,var(--bg));color:var(--lv2-up)}
.lv2-card h3+.lv2-tag{margin:8px 0 0}

/* ---------- 页首说明 ---------- */
.lv2-count{margin:0 0 24px;font-size:15px;color:var(--muted)}
.lv2-count b{color:var(--ink);font-weight:600}

/* ---------- 流量：YouTube 竖版短视频的封面是 4:3 带黑边，放大裁掉两边 ---------- */
.lv2-video .lv2-photo.is-vertical img{position:absolute;left:50%;top:50%;width:238%;max-width:none;height:auto;transform:translate(-50%,-50%)}
.lv2-player.is-wide{width:min(860px,calc(100vw - 32px))}
.lv2-player.is-wide .lv2-frame{aspect-ratio:16/9}
/* 横版视频的封面上下也有黑边（16:9 放在 4:3 里），放大到画面填满高度 */
.lv2-video .lv2-photo.is-letterbox img{position:absolute;left:50%;top:50%;width:auto;max-width:none;height:133.4%;transform:translate(-50%,-50%)}

/* ---------- 流量页下半部分：一类商品一排热门视频，横着滑 ---------- */
.lv2-shelves{margin-top:56px;padding-top:40px;border-top:1px solid var(--line)}
.lv2-shelves>h2{margin:0;font-size:22px;font-weight:700}
.lv2-shelves>p{margin:6px 0 0;font-size:15px;color:var(--muted)}
.lv2-shelf{margin-top:32px}
.lv2-shelf h3{display:flex;align-items:baseline;gap:8px;margin:0 0 14px;font-size:17px;font-weight:600}
.lv2-shelf h3 span{font-size:13px;font-weight:400;color:var(--muted)}
.lv2-shelf ul{display:grid;grid-auto-flow:column;grid-auto-columns:176px;gap:14px;margin:0 -24px;padding:0 24px 8px;list-style:none;overflow-x:auto;scroll-snap-type:x mandatory;scroll-padding:0 24px;scrollbar-width:none;overscroll-behavior-x:contain}
.lv2-shelf ul::-webkit-scrollbar{display:none}
.lv2-reel{position:relative;min-width:0;scroll-snap-align:start}
.lv2-reel .lv2-photo{position:relative;aspect-ratio:9/14;margin:0 0 10px;padding:0;border-radius:16px;background:#111;overflow:hidden}
.lv2-reel .lv2-photo img{mix-blend-mode:normal;object-fit:cover}
.lv2-reel .lv2-photo.is-vertical img{position:absolute;left:50%;top:50%;width:238%;max-width:none;height:auto;transform:translate(-50%,-50%)}
.lv2-reel .lv2-photo.is-letterbox img{position:absolute;left:50%;top:50%;width:auto;max-width:none;height:133.4%;transform:translate(-50%,-50%)}
.lv2-reel .lv2-photo.is-fallback{padding:24px 14px 48px;background:var(--lv2-tile)}
.lv2-reel .lv2-photo.is-fallback img{object-fit:contain;mix-blend-mode:multiply}
:root[data-theme=dark] .lv2-reel .lv2-photo.is-fallback{background:#e8e8ec}
.lv2-reel .lv2-play{width:48px;height:48px;margin:-24px 0 0 -24px}
.lv2-reel .lv2-play svg{width:18px;height:18px}
.lv2-reel h4{margin:0;font-size:14px;font-weight:600;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:2.8em}
.lv2-reel p{margin:4px 0 0;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.lv2-reel p b{font-weight:600;color:var(--ink)}
@media(hover:hover){.lv2-reel:hover .lv2-play{transform:scale(1.08)}}
@media(max-width:600px){
 .lv2-shelves{margin-top:40px;padding-top:32px}
 .lv2-shelves>h2{font-size:20px}
 .lv2-shelf ul{grid-auto-columns:42%;margin:0 -16px;padding:0 16px 8px;scroll-padding:0 16px}
}
.lv2-nav{display:flex;gap:8px;margin-left:auto;font-style:normal}
.lv2-nav button{display:grid;place-items:center;width:32px;height:32px;border-radius:999px;background:var(--lv2-soft);color:var(--ink);transition:transform .4s var(--lv2-spring),background-color .2s ease}
.lv2-nav button:hover{background:color-mix(in srgb,var(--ink) 14%,var(--bg))}
.lv2-nav button:active{transform:scale(.88)}
.lv2-nav button:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.lv2-nav svg{width:14px;height:14px;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
@media(hover:none){.lv2-nav{display:none}}

/* ---------- 右上角的收藏按钮（选品库里由 favorites.js 提供，样子跟“?”一致） ---------- */
.lv2 .lv2-tools .favorite-button{all:unset;box-sizing:border-box;display:grid;place-items:center;width:28px;height:28px;border-radius:999px;background:color-mix(in srgb,#fff 82%,transparent);color:#000;cursor:pointer;transition:transform .4s var(--lv2-spring),background-color .2s ease}
.lv2 .lv2-tools .favorite-button:hover{background:#fff}
.lv2 .lv2-tools .favorite-button:active{transform:scale(.88)}
.lv2 .lv2-tools .favorite-button:focus-visible{outline:2px solid #000;outline-offset:2px}
.lv2 .lv2-tools .favorite-button svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:2;stroke-linejoin:round}
.lv2 .lv2-tools .favorite-button[aria-pressed=true] svg{fill:currentColor}

/* ---------- 接进选品库（app.html）：网格交给卡片自己排 ---------- */
#main #product-grid.is-v2{display:block}
.lv2-page-lead{margin:0 0 16px;font-size:15px;color:var(--muted)}
.lv2-seg{position:relative;display:inline-grid;grid-auto-flow:column;grid-auto-columns:1fr;margin:0 0 24px;padding:3px;border-radius:999px;background:color-mix(in srgb,var(--ink) 7%,var(--bg))}
.lv2-seg i{position:absolute;top:3px;bottom:3px;left:3px;width:calc(50% - 3px);border-radius:999px;background:var(--bg);box-shadow:0 1px 3px rgba(0,0,0,.12);transition:transform .5s var(--lv2-spring)}
:root[data-theme=dark] .lv2-seg i{background:#2c2c2e}
.lv2-seg[data-on=amazon] i{transform:translateX(100%)}
#main .lv2-seg button{all:unset;box-sizing:border-box;position:relative;padding:7px 16px;font-size:14px;text-align:center;white-space:nowrap;color:var(--muted);cursor:pointer;transition:color .2s ease}
#main .lv2-seg button[aria-pressed=true]{color:var(--ink);font-weight:600}
#main .lv2-seg button:focus-visible{outline:2px solid var(--ink);outline-offset:2px;border-radius:999px}

/* ---------- 低价货源在手机上：两张图并排太小，改成在卖的商品图做主图，CJ 货源图缩成右下角的小图 ---------- */
@media(max-width:600px){
 .lv2-pair{display:block;position:relative;aspect-ratio:1/1;padding:0}
 .lv2-pair figure:first-child{position:absolute;inset:0;padding:10px 10px 12px;border-radius:14px}
 .lv2-pair figure:last-child{position:absolute;right:6px;bottom:6px;width:46%;aspect-ratio:1/1;padding:6px 6px 18px;border-radius:12px;background:#fff;box-shadow:0 1px 2px rgba(0,0,0,.08),0 0 0 1px rgba(0,0,0,.06)}
 .lv2-pair figure:first-child figcaption{display:none}
 .lv2-pair figure:last-child figcaption{bottom:3px;font-size:12px;line-height:1.2}
 :root[data-theme=dark] .lv2-pair figure:last-child{background:#fff}
}