*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  color:#1a1a1a;
  background:#fff;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  font-size:16px;
  overflow-x:hidden;
}
img{display:block;max-width:100%;height:auto}
a{color:#1565c0;text-decoration:none}
a:hover{text-decoration:underline}

.wrap{width:min(960px,calc(100% - 32px));margin:0 auto}
.shell{width:min(1140px,calc(100% - 32px));margin:0 auto}

.site-top{
  padding:16px 0;
  border-bottom:1px solid #ececec;
  background:#fff;
  position:sticky;
  top:0;
  z-index:50;
}
.top-row{display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:#111;font-weight:700;font-size:15px;text-decoration:none}
.brand:hover{text-decoration:none;color:#333}
.brand img{width:38px;border-radius:9px}
.brand small{display:block;font-size:10px;font-weight:600;color:#999;letter-spacing:.06em;margin-top:2px}
.menu-btn{display:none;border:1px solid #d0d0d0;background:#fff;padding:7px 12px;border-radius:8px;font-size:14px;cursor:pointer}
.top-nav{display:flex;gap:20px;flex-wrap:wrap}
.top-nav a{color:#555;font-size:13px;font-weight:600;text-decoration:none}
.top-nav a:hover{color:#111;text-decoration:none}
.mnav{display:none;flex-direction:column;padding:12px 0 4px;border-top:1px solid #f0f0f0;margin-top:12px}
.mnav.open{display:flex}
.mnav a{padding:10px 0;border-bottom:1px solid #f5f5f5;color:#444;font-size:14px;text-decoration:none}

.hero{padding:40px 0 20px;text-align:center}
.hero h1{font-size:clamp(26px,4.5vw,40px);line-height:1.28;margin:0 0 14px;color:#111;font-weight:800}
.hero-lead{max-width:720px;margin:0 auto;font-size:17px;color:#555;line-height:1.7}
.hero-meta{margin-top:12px;font-size:13px;color:#999}
.scroll-hint{
  display:inline-flex;align-items:center;gap:8px;
  margin-top:20px;padding:8px 16px;
  border:1px dashed #ccc;border-radius:999px;
  font-size:13px;color:#888;background:#fafafa;
}
.scroll-hint span{animation:slideHint 1.6s ease-in-out infinite alternate}
@keyframes slideHint{from{transform:translateX(-4px)}to{transform:translateX(4px)}}

.filmstrip-zone{padding:28px 0 44px;background:#fff}
.filmstrip-zone.alt{background:#fafafa;border-top:1px solid #f0f0f0;border-bottom:1px solid #f0f0f0}
.filmstrip-head{padding:0 16px 20px;text-align:center}
.filmstrip-head h2{font-size:22px;margin:0 0 8px;color:#111;font-weight:700}
.filmstrip-head p{margin:0;color:#666;font-size:15px}

.filmstrip-rail{position:relative;padding:12px 0 20px}
.filmstrip-rail::before,.filmstrip-rail::after{
  content:"";position:absolute;top:0;bottom:0;width:48px;z-index:2;pointer-events:none;
}
.filmstrip-rail::before{left:0;background:linear-gradient(90deg,#fff,transparent)}
.filmstrip-rail::after{right:0;background:linear-gradient(270deg,#fff,transparent)}
.filmstrip-zone.alt .filmstrip-rail::before{background:linear-gradient(90deg,#fafafa,transparent)}
.filmstrip-zone.alt .filmstrip-rail::after{background:linear-gradient(270deg,#fafafa,transparent)}

.filmstrip-track{
  display:flex;gap:18px;overflow-x:auto;
  scroll-snap-type:x mandatory;scroll-padding:16px;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:thin;scrollbar-color:#ccc transparent;
  padding:8px 16px 16px;
}
.filmstrip-track::-webkit-scrollbar{height:6px}
.filmstrip-track::-webkit-scrollbar-thumb{background:#ccc;border-radius:3px}

.film-card{
  flex:0 0 clamp(240px,28vw,300px);
  scroll-snap-align:start;margin:0;
  border:1px solid #e8e8e8;border-radius:14px;overflow:hidden;
  background:#fff;box-shadow:0 4px 20px rgba(0,0,0,.05);
  transition:transform .25s,box-shadow .25s;
}
.film-card:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(0,0,0,.08)}
.film-card img{width:100%;aspect-ratio:9/16;object-fit:cover;background:#f5f5f5}
.film-card.wide{flex:0 0 clamp(280px,36vw,380px)}
.film-card.wide img{aspect-ratio:16/10}
.film-card figcaption{padding:14px 16px;font-size:13px;color:#666;line-height:1.55}
.film-card figcaption strong{display:block;font-size:15px;color:#111;margin-bottom:4px}
.film-card .tag{
  display:inline-block;margin-top:8px;padding:3px 10px;border-radius:999px;
  background:#f0f4ff;color:#1565c0;font-size:11px;font-weight:600;
}

.film-perf{
  height:14px;margin:0 16px 8px;
  background:repeating-linear-gradient(90deg,#e0e0e0 0 6px,transparent 6px 14px);
  opacity:.5;
}

.content{padding:20px 0 56px}
.content h2{font-size:24px;margin:44px 0 16px;color:#111;font-weight:700}
.content h3{font-size:18px;margin:28px 0 12px;color:#222}
.content p{margin:0 0 18px;color:#333;font-size:16px;line-height:1.8}
.content ul,.content ol{margin:0 0 18px;padding-left:22px;color:#333}
.content li{margin-bottom:8px;line-height:1.75}

.tip-box{margin:28px 0;padding:18px 20px;background:#f9f9f9;border-left:4px solid #1565c0;border-radius:0 8px 8px 0;font-size:15px;color:#444}
.tip-box strong{display:block;margin-bottom:6px;color:#111;font-size:14px}

.link-row{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0}
.link-chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 16px;border:1px solid #e0e0e0;border-radius:8px;
  font-size:14px;color:#333;background:#fafafa;text-decoration:none;
}
.link-chip:hover{background:#f0f0f0;text-decoration:none;color:#111}

.faq{margin:40px 0 0;padding-top:32px;border-top:1px solid #ececec}
.faq h2{font-size:22px;margin-bottom:16px}
.faq details{border-bottom:1px solid #ececec;padding:14px 0}
.faq summary{cursor:pointer;font-weight:600;font-size:16px;color:#222;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq p{margin:10px 0 0;font-size:15px;color:#555}

.prose{padding:40px 0 56px}
.prose h1{font-size:32px;line-height:1.25;margin:0 0 18px}
.prose h2{font-size:21px;margin:32px 0 12px;color:#222}
.prose p,.prose li{font-size:16px;color:#333;line-height:1.8}
.related{margin-top:36px;padding:20px;border:1px solid #e8e8e8;border-radius:10px;background:#fafafa}
.related h3{margin:0 0 12px;font-size:14px;color:#666;letter-spacing:.04em}
.related a{display:block;padding:4px 0;font-size:15px}

.site-foot{padding:36px 0 44px;border-top:1px solid #ececec;font-size:13px;color:#888}
.site-foot a{color:#666;margin-right:14px;text-decoration:none}
.site-foot a:hover{color:#333;text-decoration:none}
.site-foot p{margin:12px 0 0}

.err{min-height:55vh;display:grid;place-items:center;text-align:center;padding:48px 20px}
.err h1{font-size:52px;margin:0 0 12px;color:#ccc}
.err p{font-size:16px;color:#666}

@media(max-width:720px){
  .menu-btn{display:block}
  .top-nav{display:none}
  .hero{padding:28px 0 16px}
  .film-card{flex:0 0 min(78vw,280px)}
  .film-card.wide{flex:0 0 min(85vw,320px)}
  .filmstrip-rail::before,.filmstrip-rail::after{width:24px}
}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .scroll-hint span{animation:none}
  .film-card{transition:none}
}