/* 四虎17.c视频 - design system [86fd11d1] */
@import url('https://fonts.googleapis.com/css2?family=Sora:wght@500;700;800&family=Manrope:wght@400;500;600&display=swap');

:root {
  --bg-86fd11d1: hsl(10 14 26);
  --surface-86fd11d1: hsl(18 22 38);
  --primary-86fd11d1: hsl(262 90% 66%);
  --accent-86fd11d1: hsl(330 95% 62%);
  --text-86fd11d1: hsl(210 25% 96%);
  --muted-86fd11d1: hsl(220 12% 65%);
  --glass-86fd11d1: hsla(0,0%,100%,.06);
  --glass-brd-86fd11d1: hsla(0,0%,100%,.12);
  --radius-86fd11d1: 18px;
  --shadow-86fd11d1: 0 20px 60px -20px hsla(0,0%,0%,.55);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { background: var(--bg-86fd11d1); color: var(--text-86fd11d1); font-family: 'Manrope', system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; line-height: 1.65; -webkit-font-smoothing: antialiased; }
body {
  background-image:
    radial-gradient(1100px 600px at 12% -10%, hsla(262, 90%, 66%, .22), transparent 60%),
    radial-gradient(900px 500px at 110% 5%, hsla(330, 95%, 62%, .18), transparent 60%);
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ----- LAYOUT ----- */
.wrap-86fd11d1 { max-width: 1240px; margin: 0 auto; padding: 0 22px; }

/* ----- NAV ----- */
.nav-86fd11d1 {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  background: hsla(0,0%,4%,.45);
  border-bottom: 1px solid var(--glass-brd-86fd11d1);
}
.nav-inner-86fd11d1 { display: flex; align-items: center; gap: 22px; padding: 14px 22px; max-width: 1240px; margin: 0 auto; }
.brand-86fd11d1 { display: flex; align-items: center; gap: 10px; font-family: 'Sora', sans-serif; font-weight: 800; font-size: 18px; letter-spacing: .3px; }
.brand-86fd11d1 svg { width: 30px; height: 30px; }
.menu-86fd11d1 { display: flex; gap: 6px; flex: 1; justify-content: center; flex-wrap: wrap; }
.menu-86fd11d1 a { padding: 8px 14px; border-radius: 999px; font-size: 14px; color: var(--muted-86fd11d1); transition: .25s ease; }
.menu-86fd11d1 a:hover, .menu-86fd11d1 a.active-86fd11d1 { color: var(--text-86fd11d1); background: var(--glass-86fd11d1); }
.search-86fd11d1 { position: relative; }
.search-86fd11d1 input {
  width: 220px; padding: 9px 14px 9px 36px; border-radius: 999px;
  background: var(--glass-86fd11d1); border: 1px solid var(--glass-brd-86fd11d1);
  color: var(--text-86fd11d1); outline: none; font-size: 14px; transition: .3s ease;
}
.search-86fd11d1 input:focus { width: 280px; border-color: var(--primary-86fd11d1); box-shadow: 0 0 0 4px hsla(262, 90%, 66%, .18); }
.search-86fd11d1 svg { position: absolute; left: 12px; top: 50%; transform: translateY(-50%); width: 16px; height: 16px; opacity: .65; }

/* ----- HERO ----- */
.hero-86fd11d1 { padding: 70px 0 50px; }
.hero-grid-86fd11d1 { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: center; }
.hero-86fd11d1 h1 { font-family: 'Sora', sans-serif; font-size: clamp(30px, 4.6vw, 56px); line-height: 1.1; font-weight: 800; letter-spacing: -.5px; }
.hero-86fd11d1 h1 .grad-86fd11d1 { background: linear-gradient(135deg, var(--primary-86fd11d1), var(--accent-86fd11d1)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-86fd11d1 p.lead-86fd11d1 { margin-top: 18px; color: var(--muted-86fd11d1); font-size: 16px; max-width: 560px; }
.hero-cta-86fd11d1 { margin-top: 26px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn-86fd11d1 { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 999px; font-weight: 600; font-size: 14px; transition: .25s ease; cursor: pointer; border: 0; }
.btn-pri-86fd11d1 { background: linear-gradient(135deg, var(--primary-86fd11d1), var(--accent-86fd11d1)); color: #0a0a14; box-shadow: var(--shadow-86fd11d1); }
.btn-pri-86fd11d1:hover { transform: translateY(-2px); }
.btn-ghost-86fd11d1 { background: var(--glass-86fd11d1); color: var(--text-86fd11d1); border: 1px solid var(--glass-brd-86fd11d1); }
.btn-ghost-86fd11d1:hover { background: hsla(0,0%,100%,.12); }
.hero-art-86fd11d1 { position: relative; aspect-ratio: 4/5; border-radius: var(--radius-86fd11d1); overflow: hidden; box-shadow: var(--shadow-86fd11d1); border: 1px solid var(--glass-brd-86fd11d1); }
.hero-art-86fd11d1 img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s ease; }
.hero-art-86fd11d1:hover img { transform: scale(1.05); }

/* breadcrumbs */
.crumbs-86fd11d1 { display: flex; gap: 8px; font-size: 13px; color: var(--muted-86fd11d1); padding: 14px 0; }
.crumbs-86fd11d1 a:hover { color: var(--text-86fd11d1); }
.crumbs-86fd11d1 span.sep-86fd11d1 { opacity: .5; }

/* section title */
.sec-86fd11d1 { padding: 48px 0; }
.sec-head-86fd11d1 { display: flex; justify-content: space-between; align-items: end; margin-bottom: 26px; flex-wrap: wrap; gap: 12px; }
.sec-head-86fd11d1 h2 { font-family: 'Sora', sans-serif; font-size: clamp(24px, 2.6vw, 34px); font-weight: 700; }
.sec-head-86fd11d1 p { color: var(--muted-86fd11d1); font-size: 14px; }

/* video grid */
.vgrid-86fd11d1 { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 22px; }
.vcard-86fd11d1 {
  position: relative; border-radius: var(--radius-86fd11d1); overflow: hidden;
  background: var(--surface-86fd11d1); border: 1px solid var(--glass-brd-86fd11d1);
  transition: transform .35s ease, box-shadow .35s ease;
}
.vcard-86fd11d1:hover { transform: translateY(-6px); box-shadow: var(--shadow-86fd11d1); }
.vmedia-86fd11d1 { position: relative; aspect-ratio: 16/10; overflow: hidden; }
.vmedia-86fd11d1 img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.vcard-86fd11d1:hover .vmedia-86fd11d1 img { transform: scale(1.08); }
.vmask-86fd11d1 { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 30%, hsla(0,0%,0%,.72)); opacity: 0; transition: .35s ease; display: flex; align-items: center; justify-content: center; }
.vcard-86fd11d1:hover .vmask-86fd11d1 { opacity: 1; }
.vplay-86fd11d1 { width: 64px; height: 64px; border-radius: 50%; background: hsla(0,0%,100%,.92); display: grid; place-items: center; transform: scale(.85); transition: .35s ease; }
.vcard-86fd11d1:hover .vplay-86fd11d1 { transform: scale(1); }
.vplay-86fd11d1 svg { width: 24px; height: 24px; color: #111; margin-left: 3px; }
.vbody-86fd11d1 { padding: 14px 16px 18px; }
.vbody-86fd11d1 h3 { font-size: 15px; font-weight: 600; line-height: 1.45; }
.vbody-86fd11d1 p { font-size: 13px; color: var(--muted-86fd11d1); margin-top: 6px; line-height: 1.55; }
.vtags-86fd11d1 { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.vtag-86fd11d1 { font-size: 11px; padding: 3px 9px; border-radius: 999px; background: var(--glass-86fd11d1); color: var(--muted-86fd11d1); }
.vmeta-86fd11d1 { position: absolute; left: 12px; top: 12px; display: flex; gap: 6px; }
.vbadge-86fd11d1 { font-size: 11px; padding: 4px 10px; border-radius: 999px; background: hsla(0,0%,0%,.55); backdrop-filter: blur(6px); color: var(--text-86fd11d1); border: 1px solid var(--glass-brd-86fd11d1); }
.vdur-86fd11d1 { position: absolute; right: 12px; bottom: 12px; font-size: 12px; padding: 3px 8px; border-radius: 6px; background: hsla(0,0%,0%,.7); color: #fff; }

/* community */
.cgrid-86fd11d1 { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 18px; }
.ccard-86fd11d1 { padding: 22px; border-radius: var(--radius-86fd11d1); background: var(--glass-86fd11d1); border: 1px solid var(--glass-brd-86fd11d1); backdrop-filter: blur(14px); }
.ccard-86fd11d1 .stars-86fd11d1 { color: hsl(44 100% 60%); font-size: 14px; letter-spacing: 2px; }
.ccard-86fd11d1 blockquote { font-size: 14px; margin: 10px 0 14px; color: var(--text-86fd11d1); }
.ccard-86fd11d1 .who-86fd11d1 { font-size: 13px; color: var(--muted-86fd11d1); }

/* contact */
.contact-grid-86fd11d1 { display: grid; grid-template-columns: 1.2fr 1fr; gap: 28px; }
.contact-card-86fd11d1 { padding: 26px; border-radius: var(--radius-86fd11d1); background: var(--surface-86fd11d1); border: 1px solid var(--glass-brd-86fd11d1); }
.contact-card-86fd11d1 h3 { font-family: 'Sora', sans-serif; font-size: 20px; margin-bottom: 14px; }
.kv-86fd11d1 { display: grid; grid-template-columns: 110px 1fr; gap: 8px 14px; font-size: 14px; }
.kv-86fd11d1 dt { color: var(--muted-86fd11d1); }
.qrwrap-86fd11d1 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 18px; text-align: center; }
.qrwrap-86fd11d1 .qrbox-86fd11d1 { padding: 10px; border-radius: 12px; background: var(--glass-86fd11d1); border: 1px solid var(--glass-brd-86fd11d1); font-size: 12px; color: var(--muted-86fd11d1); }
.qrwrap-86fd11d1 .qrbox-86fd11d1 img { width: 100%; aspect-ratio: 1; border-radius: 8px; margin-bottom: 8px; }

/* share */
.share-86fd11d1 { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; }
.share-btn-86fd11d1 { width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; background: var(--glass-86fd11d1); border: 1px solid var(--glass-brd-86fd11d1); transition: .25s ease; }
.share-btn-86fd11d1:hover { transform: translateY(-3px); background: var(--primary-86fd11d1); color: #0a0a14; }
.share-btn-86fd11d1 svg { width: 18px; height: 18px; }

/* faq */
.faqlist-86fd11d1 { display: flex; flex-direction: column; gap: 12px; }
.faqlist-86fd11d1 details {
  background: var(--glass-86fd11d1); border: 1px solid var(--glass-brd-86fd11d1);
  border-radius: 14px; padding: 16px 20px; transition: background .3s ease;
}
.faqlist-86fd11d1 details[open] { background: hsla(0,0%,100%,.08); }
.faqlist-86fd11d1 summary { cursor: pointer; font-weight: 600; font-size: 15px; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faqlist-86fd11d1 summary::-webkit-details-marker { display: none; }
.faqlist-86fd11d1 summary::after { content: '+'; font-size: 22px; color: var(--primary-86fd11d1); transition: transform .3s ease; }
.faqlist-86fd11d1 details[open] summary::after { transform: rotate(45deg); }
.faqlist-86fd11d1 .ans-86fd11d1 { margin-top: 10px; color: var(--muted-86fd11d1); font-size: 14px; line-height: 1.7; }

/* footer */
.foot-86fd11d1 { margin-top: 40px; padding: 50px 0 24px; border-top: 1px solid var(--glass-brd-86fd11d1); background: hsla(0,0%,0%,.25); }
.foot-grid-86fd11d1 { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 30px; }
.foot-grid-86fd11d1 h4 { font-size: 14px; margin-bottom: 12px; color: var(--text-86fd11d1); font-family: 'Sora', sans-serif; }
.foot-grid-86fd11d1 a { display: block; font-size: 13px; color: var(--muted-86fd11d1); padding: 4px 0; }
.foot-grid-86fd11d1 a:hover { color: var(--text-86fd11d1); }
.foot-bottom-86fd11d1 { margin-top: 30px; padding-top: 20px; border-top: 1px solid var(--glass-brd-86fd11d1); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; font-size: 12px; color: var(--muted-86fd11d1); }

/* responsive */
@media (max-width: 880px) {
  .hero-grid-86fd11d1, .contact-grid-86fd11d1, .foot-grid-86fd11d1 { grid-template-columns: 1fr; }
  .menu-86fd11d1 { display: none; }
  .search-86fd11d1 input { width: 160px; }
  .search-86fd11d1 input:focus { width: 200px; }
  .hero-86fd11d1 { padding: 36px 0 24px; }
}

/* fade-in */
.fade-86fd11d1 { opacity: 0; transform: translateY(20px); transition: opacity .8s ease, transform .8s ease; }
.fade-86fd11d1.in-86fd11d1 { opacity: 1; transform: none; }