:root {
  --bg: #0b0b0d;
  --bg-2: #121216;
  --bg-3: #1a1a20;
  --text: #f2f2f4;
  --muted: #a8a8b3;
  --line: rgba(255, 255, 255, 0.08);
  --accent: #c62828;
  --accent-2: #ff5252;
  --ok: #2ecc71;
  --radius: 12px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
  --max: 1180px;
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(198, 40, 40, 0.18), transparent 55%),
    radial-gradient(900px 420px at 100% 0%, rgba(255, 82, 82, 0.08), transparent 50%),
    var(--bg);
  color: var(--text);
  line-height: 1.75;
  min-height: 100vh;
}
img { max-width: 100%; display: block; height: auto; }
a { color: var(--accent-2); text-decoration: none; }
a:hover { color: #fff; }
ul { list-style: none; }
.container { width: min(100% - 32px, var(--max)); margin: 0 auto; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #fff; padding: 8px 12px; z-index: 100;
}
.skip:focus { left: 12px; top: 12px; }

.site-header {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(11, 11, 13, 0.86);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 68px; gap: 16px;
}
.brand {
  display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700;
}
.brand img {
  width: 42px; height: 42px; border-radius: 10px;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08);
}
.brand span { font-size: 1.15rem; letter-spacing: 0.04em; }
.nav-links { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.nav-links a {
  color: var(--muted); padding: 8px 12px; border-radius: 999px; font-size: 0.95rem;
}
.nav-links a:hover, .nav-links a.active {
  color: #fff; background: rgba(255,255,255,0.06);
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 22px; border-radius: 999px; border: 0; cursor: pointer;
  font-weight: 700; transition: .2s ease; text-align: center;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #8e1b1b);
  color: #fff !important;
  box-shadow: 0 8px 24px rgba(198, 40, 40, 0.35);
}
.btn-primary:hover { transform: translateY(-1px); filter: brightness(1.08); }
.btn-ghost {
  background: transparent; color: #fff !important;
  border: 1px solid rgba(255,255,255,0.18);
}
.menu-toggle {
  display: none; width: 42px; height: 42px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--bg-2); color: #fff;
}

.hero {
  padding: 56px 0 36px;
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 36px; align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  color: var(--ok); font-size: 0.9rem; margin-bottom: 14px;
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  line-height: 1.25; margin-bottom: 16px; letter-spacing: 0.02em;
}
.hero h1 em { font-style: normal; color: var(--accent-2); }
.hero-lead { color: var(--muted); font-size: 1.05rem; margin-bottom: 24px; max-width: 56ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 18px; }
.hero-meta { color: var(--muted); font-size: 0.92rem; }
.hero-visual {
  position: relative; border-radius: 18px; overflow: hidden;
  box-shadow: var(--shadow); border: 1px solid var(--line);
  background: var(--bg-2);
}
.hero-visual img { width: 100%; aspect-ratio: 9/16; object-fit: cover; max-height: 560px; }
.hero-float {
  position: absolute; left: 14px; right: 14px; bottom: 14px;
  background: rgba(0,0,0,0.72); backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.1); border-radius: 12px; padding: 12px 14px;
}
.hero-float strong { display: block; margin-bottom: 4px; }

.section { padding: 48px 0; }
.section-head { margin-bottom: 24px; max-width: 70ch; }
.section-head h2 {
  font-size: clamp(1.4rem, 3vw, 1.9rem); margin-bottom: 10px;
}
.section-head p { color: var(--muted); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.015));
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
}
.card-body { padding: 18px; }
.card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.card p, .card li { color: var(--muted); font-size: 0.96rem; }
.card img {
  width: 100%; aspect-ratio: 9/16; object-fit: cover; background: #000;
  max-height: 420px;
}
.shot-row .card img { max-height: 480px; }

.feature-list { display: grid; gap: 12px; margin-top: 10px; }
.feature-list li {
  display: grid; grid-template-columns: 22px 1fr; gap: 10px;
  color: var(--muted);
}
.feature-list li::before {
  content: ""; width: 10px; height: 10px; margin-top: 8px;
  border-radius: 50%; background: var(--accent-2);
  box-shadow: 0 0 0 4px rgba(255, 82, 82, 0.15);
}

.prose {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 24px;
}
.prose h2, .prose h3 { margin: 1.4em 0 0.6em; }
.prose h2:first-child, .prose h3:first-child { margin-top: 0; }
.prose p { margin-bottom: 1em; color: #d7d7de; }
.prose ul, .prose ol { margin: 0 0 1em 1.2em; }
.prose li { margin-bottom: 0.45em; color: #d7d7de; list-style: disc; }
.prose a { text-decoration: underline; text-underline-offset: 3px; }

.cta-band {
  margin: 20px 0 0;
  padding: 28px;
  border-radius: 18px;
  background:
    linear-gradient(120deg, rgba(198,40,40,0.25), rgba(18,18,22,0.9)),
    var(--bg-2);
  border: 1px solid rgba(255,82,82,0.25);
  display: flex; flex-wrap: wrap; gap: 18px; align-items: center; justify-content: space-between;
}
.cta-band h2 { font-size: 1.4rem; margin-bottom: 6px; }
.cta-band p { color: var(--muted); max-width: 55ch; }

.breadcrumb {
  padding: 18px 0 0; color: var(--muted); font-size: 0.9rem;
}
.breadcrumb a { color: var(--muted); }
.page-hero { padding: 28px 0 10px; }
.page-hero h1 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 10px; }
.page-hero p { color: var(--muted); max-width: 70ch; }

.site-footer {
  margin-top: 40px; border-top: 1px solid var(--line);
  background: #08080a; padding: 36px 0 24px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 24px; margin-bottom: 24px;
}
.site-footer h3 { margin-bottom: 12px; font-size: 1rem; }
.site-footer p, .site-footer a { color: var(--muted); }
.site-footer a { display: inline-block; margin-bottom: 8px; }
.site-footer a:hover { color: #fff; }
.copyright {
  border-top: 1px solid var(--line); padding-top: 16px;
  color: #777784; font-size: 0.88rem;
}

.error-page {
  min-height: 70vh; display: grid; place-items: center; text-align: center; padding: 60px 0;
}
.error-page .code {
  font-size: clamp(4rem, 12vw, 7rem); font-weight: 800; color: var(--accent-2);
  line-height: 1; margin-bottom: 10px;
}
.error-page h1 { margin-bottom: 12px; }
.error-page p { color: var(--muted); margin-bottom: 22px; }

.faq details {
  border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px;
  background: rgba(255,255,255,0.02); margin-bottom: 10px;
}
.faq summary { cursor: pointer; font-weight: 700; }
.faq details p { margin-top: 10px; color: var(--muted); }

@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; padding-top: 28px; }
  .hero-visual { max-width: 360px; margin: 0 auto; }
  .grid-3, .grid-4, .footer-grid { grid-template-columns: 1fr 1fr; }
  .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav-links {
    display: none; position: absolute; left: 16px; right: 16px; top: 68px;
    background: #121217; border: 1px solid var(--line); border-radius: 14px;
    padding: 12px; flex-direction: column; align-items: stretch;
    box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 14px; }
}

@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4, .footer-grid { grid-template-columns: 1fr; }
  .hero-actions .btn, .cta-band .btn { width: 100%; }
  .prose { padding: 20px 16px; }
  .card img { max-height: 520px; }
}