/* 91PO官网 · 91p.pics — Amber Eclipse Midnight */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --ink:#06060a;
  --night:#0c0e18;
  --panel:#12151f;
  --glass:rgba(18,21,31,.88);
  --ember:#ff8a00;
  --flame:#ff5c1a;
  --rose:#ff2d6a;
  --violet:#7c3aed;
  --cyan:#00d4b8;
  --mist:#8b93a8;
  --snow:#eceef4;
  --line:rgba(255,138,0,.12);
  --glow:0 0 48px rgba(255,92,26,.22);
  --radius:12px;
  --nav-h:52px;
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
html{scroll-behavior:smooth;font-size:16px}
body{
  font-family:var(--font);
  background:var(--ink);
  color:var(--snow);
  line-height:1.82;
  min-height:100vh;
  background-image:
    radial-gradient(ellipse 70% 45% at 85% 0%,rgba(124,58,237,.14),transparent 55%),
    radial-gradient(ellipse 55% 35% at 10% 5%,rgba(255,92,26,.1),transparent 50%),
    radial-gradient(ellipse 40% 30% at 50% 100%,rgba(0,212,184,.05),transparent 60%),
    linear-gradient(168deg,var(--ink) 0%,var(--night) 50%,#080a12 100%);
}
img{max-width:100%;height:auto;display:block}
a{color:var(--ember);text-decoration:none;transition:color .2s}
a:hover{color:var(--cyan)}
.wrap{max-width:1080px;margin:0 auto;padding:0 14px}

/* Header */
.pk-head{
  position:fixed;top:0;left:0;right:0;z-index:900;
  height:var(--nav-h);
  background:var(--glass);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
}
.pk-head::after{
  content:"";position:absolute;bottom:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--ember),var(--rose),transparent);
  opacity:.35;
}
.pk-head-in{
  max-width:1080px;margin:0 auto;padding:0 14px;
  height:100%;display:flex;align-items:center;justify-content:space-between;
}
.pk-brand{display:flex;align-items:center;gap:8px;color:var(--snow);font-weight:800;font-size:.95rem;letter-spacing:.03em}
.pk-brand img{border-radius:9px;width:32px;height:32px}
.pk-brand em{font-style:normal;color:var(--ember)}
.pk-nav{display:flex;gap:1px}
.pk-nav a{padding:5px 11px;border-radius:8px;font-size:.82rem;color:var(--mist)}
.pk-nav a:hover,.pk-nav a.on{color:var(--ember);background:rgba(255,138,0,.08)}
.pk-toggle{display:none;background:none;border:none;cursor:pointer;padding:7px}
.pk-toggle i{display:block;width:19px;height:2px;background:var(--snow);margin:4px 0;border-radius:1px}

/* Sticky download bar */
.pk-stick{
  position:fixed;top:var(--nav-h);left:0;right:0;z-index:850;
  background:rgba(8,10,16,.96);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transform:translateY(-110%);opacity:0;pointer-events:none;
  transition:transform .28s ease,opacity .28s ease;
}
.pk-stick.show{transform:translateY(0);opacity:1;pointer-events:auto}
.pk-stick .wrap{padding:5px 8px}
#sticky-ads{display:flex;flex-wrap:wrap;justify-content:center;gap:3px}

/* Download zone */
.pk-dlzone{
  padding-top:calc(var(--nav-h) + 10px);
  background:linear-gradient(180deg,rgba(255,92,26,.07) 0%,transparent 80%);
}
.pk-dlzone-label{
  text-align:center;font-size:.68rem;color:var(--mist);
  letter-spacing:.18em;text-transform:uppercase;margin-bottom:2px;
}
#ads{
  display:flex;justify-content:center;align-items:flex-start;flex-wrap:wrap;
  margin:4px 0 8px;
}
#ads>div,#sticky-ads>div{
  display:flex;flex-direction:column;align-items:center;
  width:calc(12.5% - 5px);min-width:0;box-sizing:border-box;
}
#ads img,#sticky-ads img{
  width:58px;height:58px;object-fit:cover;border-radius:14px;
  box-shadow:0 4px 14px rgba(0,0,0,.4);
  transition:transform .16s ease,box-shadow .16s ease;
  border:1px solid rgba(255,138,0,.18);
}
#ads a,#sticky-ads a{display:inline-block;text-decoration:none;border-radius:13px}
#ads img:hover,#sticky-ads img:hover{
  transform:translateY(-3px) scale(1.03);
  box-shadow:0 8px 20px rgba(255,92,26,.25);
}
#ads .caption,#sticky-ads .caption{
  height:14px;font-size:10px;color:var(--mist);
  text-align:center;max-width:72px;overflow:hidden;
  text-overflow:ellipsis;white-space:nowrap;margin-top:2px;
}

/* Hero */
.pk-hero{
  padding:28px 0 36px;
  position:relative;overflow:hidden;
}
.pk-hero::before{
  content:"";position:absolute;top:-60px;right:-80px;
  width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,45,106,.18),transparent 70%);
  pointer-events:none;
}
.pk-hero-grid{
  display:grid;grid-template-columns:1fr;gap:24px;align-items:center;
}
.pk-hero h1{
  font-size:clamp(1.45rem,4.5vw,2rem);
  font-weight:800;line-height:1.35;letter-spacing:-.01em;
}
.pk-hero h1 span{
  display:block;margin-top:8px;
  font-size:clamp(.82rem,2.5vw,.95rem);
  font-weight:500;color:var(--mist);
  letter-spacing:.04em;
}
.pk-hero-lead{font-size:.92rem;color:var(--mist);margin:14px 0 18px}
.pk-tags{display:flex;flex-wrap:wrap;gap:7px}
.pk-tags span{
  font-size:.72rem;padding:4px 11px;border-radius:20px;
  background:rgba(124,58,237,.12);color:var(--cyan);
  border:1px solid rgba(0,212,184,.15);
}
.pk-hero-phones{
  display:flex;justify-content:center;gap:10px;perspective:800px;
}
.pk-hero-phones .ph{
  border-radius:16px;overflow:hidden;
  box-shadow:0 12px 40px rgba(0,0,0,.5),var(--glow);
  border:1px solid rgba(255,138,0,.15);
}
.pk-hero-phones .ph:nth-child(1){transform:rotate(-6deg) translateY(8px);width:108px}
.pk-hero-phones .ph:nth-child(2){transform:scale(1.06);width:120px;z-index:2}
.pk-hero-phones .ph:nth-child(3){transform:rotate(6deg) translateY(8px);width:108px}

/* Stats */
.pk-metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:10px;
  margin:0 0 32px;
}
.pk-metric{
  text-align:center;padding:14px 8px;
  background:var(--panel);border-radius:var(--radius);
  border:1px solid var(--line);
}
.pk-metric b{display:block;font-size:1.35rem;color:var(--ember);font-weight:800}
.pk-metric span{font-size:.72rem;color:var(--mist)}

/* Section */
.pk-sec{margin-bottom:36px}
.pk-sec-head{margin-bottom:18px}
.pk-sec-head h2{
  font-size:1.2rem;font-weight:800;color:var(--snow);
  padding-left:12px;border-left:3px solid var(--ember);
}
.pk-sec-head p{font-size:.84rem;color:var(--mist);margin-top:6px;padding-left:15px}

/* 3:7 split */
.pk-split{
  display:grid;grid-template-columns:3fr 7fr;gap:22px;align-items:start;
  margin-bottom:28px;
}
.pk-split.rev{grid-template-columns:7fr 3fr}
.pk-split.rev .pk-shot{order:2}
.pk-split.rev .pk-body{order:1}
.pk-shot{
  border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);
  box-shadow:0 8px 28px rgba(0,0,0,.35);
}
.pk-shot img{width:100%;border-radius:var(--radius)}
.pk-body h3{font-size:1.02rem;font-weight:700;margin-bottom:10px;color:var(--snow)}
.pk-body p{font-size:.88rem;color:var(--mist);margin-bottom:10px}
.pk-body ul{margin:8px 0 10px 16px;font-size:.86rem;color:var(--mist)}
.pk-body li{margin-bottom:5px}
.pk-cta{
  display:inline-block;margin-top:6px;padding:8px 20px;
  background:linear-gradient(135deg,var(--flame),var(--ember));
  color:var(--snow);border-radius:24px;font-size:.82rem;font-weight:600;
  border:none;cursor:pointer;transition:transform .15s,box-shadow .15s;
}
.pk-cta:hover{color:var(--snow);transform:translateY(-1px);box-shadow:var(--glow)}

/* Feature grid */
.pk-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:12px;
}
.pk-card{
  padding:16px;background:var(--panel);
  border-radius:var(--radius);border:1px solid var(--line);
}
.pk-card h4{font-size:.9rem;font-weight:700;margin-bottom:6px;color:var(--ember)}
.pk-card p{font-size:.82rem;color:var(--mist)}

/* FAQ */
.pk-faq{border-top:1px solid var(--line)}
.pk-faq-item{border-bottom:1px solid var(--line)}
.pk-faq-q{
  width:100%;text-align:left;padding:14px 0;
  background:none;border:none;color:var(--snow);
  font-size:.9rem;font-weight:600;cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;
}
.pk-faq-q::after{content:"+";color:var(--ember);font-size:1.1rem;transition:transform .2s}
.pk-faq-item.open .pk-faq-q::after{transform:rotate(45deg)}
.pk-faq-a{
  max-height:0;overflow:hidden;transition:max-height .3s ease;
  font-size:.84rem;color:var(--mist);
}
.pk-faq-item.open .pk-faq-a{max-height:480px;padding-bottom:14px}

/* Gallery */
.pk-gallery{
  display:grid;grid-template-columns:repeat(4,1fr);gap:12px;
  margin-bottom:28px;
}
.pk-gitem{
  border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);background:var(--panel);
}
.pk-gitem img{width:100%;aspect-ratio:9/16;object-fit:cover}
.pk-gitem figcaption{
  padding:8px 10px;font-size:.72rem;color:var(--mist);
  line-height:1.45;border-top:1px solid var(--line);
}

/* Article block */
.pk-article{
  padding:22px 20px;margin-bottom:28px;
  background:var(--panel);border-radius:var(--radius);
  border:1px solid var(--line);
}
.pk-article h3{font-size:1rem;color:var(--snow);margin:18px 0 10px;font-weight:700}
.pk-article h3:first-child{margin-top:0}
.pk-article p{font-size:.86rem;color:var(--mist);margin-bottom:11px}
.pk-article ul{margin:8px 0 12px 18px;font-size:.86rem;color:var(--mist)}
.pk-article li{margin-bottom:5px}

/* Two-column text */
.pk-cols{
  display:grid;grid-template-columns:1fr 1fr;gap:18px;
  margin-bottom:28px;
}
.pk-col-block{
  padding:18px;background:var(--panel);
  border-radius:var(--radius);border:1px solid var(--line);
}
.pk-col-block h3{font-size:.95rem;color:var(--ember);margin-bottom:10px;font-weight:700}
.pk-col-block p{font-size:.84rem;color:var(--mist);margin-bottom:9px}

/* Text block */
.pk-prose{font-size:.88rem;color:var(--mist)}
.pk-prose h3{font-size:1rem;color:var(--snow);margin:20px 0 10px;font-weight:700}
.pk-prose p{margin-bottom:12px}
.pk-prose ul{margin:8px 0 12px 18px}
.pk-prose li{margin-bottom:6px}

/* Breadcrumb */
.pk-crumb{
  font-size:.78rem;color:var(--mist);
  padding:18px 0 12px;
}
.pk-crumb a{color:var(--mist)}
.pk-crumb a:hover{color:var(--ember)}

/* Page */
.pk-page{padding-bottom:48px}
.pk-page h1{font-size:1.35rem;font-weight:800;margin-bottom:16px}
.pk-page h2{font-size:1.05rem;font-weight:700;margin:22px 0 10px;color:var(--snow)}

/* Error pages */
.pk-err{
  text-align:center;padding:60px 20px 80px;
  min-height:calc(100vh - var(--nav-h) - 120px);
}
.pk-err b{font-size:4rem;color:var(--ember);display:block;line-height:1}
.pk-err h1{font-size:1.2rem;margin:12px 0 8px}
.pk-err p{font-size:.88rem;color:var(--mist);margin-bottom:20px}

/* Footer */
.pk-foot{
  border-top:1px solid var(--line);
  padding:24px 0 32px;text-align:center;
  font-size:.76rem;color:var(--mist);
}
.pk-foot nav{display:flex;flex-wrap:wrap;justify-content:center;gap:6px 14px;margin-bottom:10px}
.pk-foot nav a{color:var(--mist)}
.pk-foot nav a:hover{color:var(--ember)}

/* Responsive */
@media(max-width:768px){
  .pk-toggle{display:block}
  .pk-nav{
    position:fixed;top:var(--nav-h);left:0;right:0;
    background:rgba(8,10,16,.97);backdrop-filter:blur(16px);
    flex-direction:column;padding:10px 14px;
    border-bottom:1px solid var(--line);
    transform:translateY(-120%);opacity:0;pointer-events:none;
    transition:transform .25s,opacity .25s;
  }
  .pk-nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .pk-nav a{padding:10px 12px;font-size:.9rem}
  .pk-split,.pk-split.rev{grid-template-columns:1fr}
  .pk-split.rev .pk-shot{order:0}
  .pk-split.rev .pk-body{order:0}
  .pk-metrics{grid-template-columns:repeat(2,1fr)}
  .pk-grid{grid-template-columns:1fr}
  .pk-gallery{grid-template-columns:repeat(2,1fr)}
  .pk-cols{grid-template-columns:1fr}
  #ads>div,#sticky-ads>div{width:calc(25% - 4px)}
  #ads img,#sticky-ads img{width:52px;height:52px}
  .pk-hero-phones .ph:nth-child(1),.pk-hero-phones .ph:nth-child(3){display:none}
  .pk-hero-phones .ph:nth-child(2){transform:none;width:140px}
}
@media(min-width:769px){
  .pk-hero-grid{grid-template-columns:1.1fr .9fr}
}