/* po 专属样式 — 类名前缀 po 确保前端指纹唯一 */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --po-bg:#0f1c19;--po-bg2:#142823;--po-fg:#e6f5ee;--po-mute:#8fbfae;
  --po-accent:#36c98a;--po-accent2:#7ee7c1;
  --po-glass:rgba(54,201,138,0.10);--po-border:rgba(54,201,138,0.30);--po-radius:8px;
}
html,body{background:var(--po-bg);color:var(--po-fg);font-family:"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none} img{max-width:100%;display:block}
.po-nav{position:sticky;top:0;z-index:50;background:var(--po-bg2);border-bottom:1px solid var(--po-border);backdrop-filter:saturate(180%) blur(14px)}
.po-nav-inner{max-width:1280px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.po-logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;color:var(--po-fg)}
.po-logo svg{width:34px;height:34px}
.po-nav nav ul{list-style:none;display:flex;gap:18px;flex-wrap:wrap}
.po-link{color:var(--po-mute);font-size:14.5px;padding:6px 4px;border-bottom:2px solid transparent;transition:.2s}
.po-link:hover,.po-active{color:var(--po-fg);border-color:var(--po-accent)}
.po-search{margin-left:auto;display:flex;gap:8px}
.po-search input{background:var(--po-glass);border:1px solid var(--po-border);color:var(--po-fg);padding:8px 12px;border-radius:var(--po-radius);outline:none;width:220px;font-size:14px}
.po-search button{background:var(--po-accent);color:#fff;border:0;padding:8px 16px;border-radius:var(--po-radius);cursor:pointer;font-weight:600}
.po-main{max-width:1280px;margin:24px auto;padding:0 24px}
.po-crumbs{max-width:1280px;margin:18px auto 0;padding:0 24px;color:var(--po-mute);font-size:13px}
.po-crumbs a{color:var(--po-accent)}
.po-section-h{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin:28px 0 16px;border-bottom:1px solid var(--po-border);padding-bottom:10px}
.po-section-h h2{font-size:21px;font-weight:700;letter-spacing:.5px}
.po-section-sub{color:var(--po-mute);font-size:13px;max-width:55%}
.po-channel-foot{max-width:1280px;margin:18px auto 0;padding:14px 22px;color:var(--po-mute);font-size:13.5px;border-left:3px solid var(--po-accent);background:var(--po-bg2);border-radius:var(--po-radius)}
.po-hero{max-width:1280px;margin:24px auto 0;padding:0 24px}
.po-hero-card{position:relative;border-radius:var(--po-radius);overflow:hidden;border:1px solid var(--po-border)}
.po-hero-card img{width:100%;height:auto;object-fit:cover;aspect-ratio:16/7}
.po-hero-overlay{position:absolute;inset:auto 0 0 0;padding:30px 32px;background:linear-gradient(180deg,transparent,rgba(0,0,0,.7));color:#fff}
.po-hero-overlay h1{font-size:30px;margin-bottom:8px}
.po-hero-overlay p{font-size:14px;max-width:780px;opacity:.92}

.po-grid{column-count:3;column-gap:14px}
.po-grid .po-card{break-inside:avoid;margin-bottom:14px;display:inline-block;width:100%}
@media(max-width:980px){.po-grid{column-count:2}}
@media(max-width:560px){.po-grid{column-count:1}}
.po-card{background:var(--po-bg2);border:1px solid var(--po-border);border-radius:var(--po-radius);overflow:hidden;transition:.3s}
.po-card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,0,0,.18)}
.po-thumb{position:relative;overflow:hidden;background:#000}
.po-thumb img{width:100%;height:auto;object-fit:cover;aspect-ratio:16/10;transition:.4s}
.po-card:hover .po-thumb img{transform:scale(1.05)}
.po-mask{position:absolute;inset:0;background:linear-gradient(180deg,transparent 60%,rgba(0,0,0,.5));display:flex;align-items:center;justify-content:center;opacity:0;transition:.3s}
.po-card:hover .po-mask{opacity:1}
.po-play{width:54px;height:54px;border-radius:50%;background:var(--po-accent);position:relative}
.po-play::after{content:"";position:absolute;left:55%;top:50%;transform:translate(-50%,-50%);border-left:14px solid #fff;border-top:9px solid transparent;border-bottom:9px solid transparent}
.po-meta{padding:13px 15px}
.po-meta h3{font-size:15px;line-height:1.45;margin-bottom:6px}
.po-meta p{color:var(--po-mute);font-size:13px;line-height:1.55}
.po-tags{margin-top:8px;display:flex;gap:6px;flex-wrap:wrap}
.po-tags span{font-size:11.5px;padding:2px 8px;background:var(--po-glass);border:1px solid var(--po-border);border-radius:999px;color:var(--po-mute)}
.po-reviews{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px}
.po-review{padding:16px;background:var(--po-bg2);border:1px solid var(--po-border);border-radius:var(--po-radius)}
.po-stars{color:var(--po-accent2);margin-bottom:6px;letter-spacing:2px}
.po-review p{color:var(--po-mute);font-size:13.5px}
.po-user{margin-top:8px;color:var(--po-fg);font-size:13px;font-weight:600}
.po-contact{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.po-block{padding:18px 20px;background:var(--po-bg2);border:1px solid var(--po-border);border-radius:var(--po-radius)}
.po-block h3{font-size:15px;margin-bottom:10px}
.po-block ul{list-style:none;color:var(--po-mute);font-size:13.5px;line-height:2}
.po-share{display:flex;gap:10px;margin-top:8px;flex-wrap:wrap}
.po-share a{padding:6px 14px;background:var(--po-accent);color:#fff;border-radius:var(--po-radius);font-size:13px}
.po-faq{padding:14px 18px;background:var(--po-bg2);border:1px solid var(--po-border);border-radius:var(--po-radius);margin-bottom:8px}
.po-faq summary{cursor:pointer;font-weight:600;font-size:14.5px}
.po-faq p{margin-top:8px;color:var(--po-mute);font-size:13.5px}
.po-footer{margin-top:50px;border-top:1px solid var(--po-border);background:var(--po-bg2)}
.po-footer-inner{max-width:1280px;margin:0 auto;padding:30px 24px;display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}
.po-footer h4{font-size:14px;margin-bottom:10px;color:var(--po-fg)}
.po-footer ul{list-style:none;color:var(--po-mute);font-size:13px;line-height:1.9}
.po-footer a{color:var(--po-mute)} .po-footer a:hover{color:var(--po-accent)}
.po-footer p{color:var(--po-mute);font-size:13px}
.po-copy{text-align:center;padding:16px;color:var(--po-mute);font-size:12.5px;border-top:1px solid var(--po-border)}
@media (max-width:780px){.po-search{display:none}.po-section-sub{display:none}.po-contact,.po-footer-inner{grid-template-columns:1fr}}