:root {
  --bg: #0b0b0f;
  --bg-soft: #14141c;
  --bg-card: #1a1a24;
  --line: rgba(255, 255, 255, 0.08);
  --text: #f2f2f5;
  --muted: #a7a7b5;
  --accent: #e11d48;
  --accent-2: #fb7185;
  --max: 1120px;
  --radius: 14px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --font: "Noto Sans SC", "PingFang SC", "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(225, 29, 72, 0.18), transparent 55%),
    radial-gradient(900px 420px at 90% 0%, rgba(251, 113, 133, 0.12), transparent 50%),
    linear-gradient(180deg, #09090d 0%, var(--bg) 40%, #0d0d14 100%);
  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;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  color: #fff;
}

.container {
  width: min(100% - 32px, var(--max));
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  background: var(--accent);
  color: #fff;
  padding: 8px 12px;
  z-index: 1000;
}

.skip-link:focus {
  left: 8px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(11, 11, 15, 0.82);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--muted);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.95rem;
}

.nav a:hover,
.nav a.active {
  color: #fff;
  background: rgba(225, 29, 72, 0.16);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: #fff;
  border-radius: 10px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.menu-toggle .bar {
  display: block;
  width: 18px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  position: relative;
  transition: background 0.2s ease;
}

.menu-toggle .bar::before,
.menu-toggle .bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform 0.2s ease, top 0.2s ease;
}

.menu-toggle .bar::before {
  top: -6px;
}

.menu-toggle .bar::after {
  top: 6px;
}

.menu-toggle.open .bar {
  background: transparent;
}

.menu-toggle.open .bar::before {
  top: 0;
  transform: rotate(45deg);
}

.menu-toggle.open .bar::after {
  top: 0;
  transform: rotate(-45deg);
}

.hero {
  padding: 48px 0 28px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  color: var(--accent-2);
  background: rgba(225, 29, 72, 0.12);
  border: 1px solid rgba(225, 29, 72, 0.28);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  margin-bottom: 14px;
}

.hero h1 {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  line-height: 1.25;
  margin-bottom: 14px;
}

.hero-lead {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 22px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 12px;
  font-weight: 600;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #be123c);
  color: #fff;
}

.btn-primary:hover {
  color: #fff;
  opacity: 0.92;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--line);
  color: #fff;
}

.hero-panel {
  position: relative;
  border-radius: calc(var(--radius) + 4px);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  background: var(--bg-card);
}

.hero-panel img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  max-height: 560px;
}

.section {
  padding: 42px 0;
}

.section-head {
  margin-bottom: 22px;
}

.section-head h2 {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  margin-bottom: 8px;
}

.section-head p {
  color: var(--muted);
  max-width: 720px;
}

.prose {
  background: rgba(20, 20, 28, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
}

.prose h2,
.prose h3 {
  margin: 1.4em 0 0.7em;
  line-height: 1.35;
}

.prose h2:first-child,
.prose h3:first-child {
  margin-top: 0;
}

.prose p {
  color: #d4d4dc;
  margin-bottom: 1em;
  text-align: justify;
}

.prose ul,
.prose ol {
  margin: 0 0 1em 1.2em;
  color: #d4d4dc;
}

.prose li {
  margin-bottom: 0.45em;
}

.feature-grid,
.shot-grid,
.card-grid {
  display: grid;
  gap: 16px;
}

.feature-grid {
  grid-template-columns: repeat(3, 1fr);
}

.shot-grid {
  grid-template-columns: repeat(4, 1fr);
}

.card-grid {
  grid-template-columns: repeat(2, 1fr);
}

.feature-card,
.content-card,
.shot-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.feature-card,
.content-card {
  padding: 18px;
}

.feature-card h3,
.content-card h3 {
  font-size: 1.08rem;
  margin: 12px 0 8px;
}

.feature-card p,
.content-card p {
  color: var(--muted);
  font-size: 0.96rem;
}

.feature-card img,
.content-card img,
.shot-card img {
  width: 100%;
  border-radius: 10px;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  background: #000;
}

.shot-card {
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.shot-card:hover {
  transform: translateY(-3px);
  border-color: rgba(225, 29, 72, 0.45);
}

.shot-card figcaption {
  padding: 10px 12px 14px;
  color: var(--muted);
  font-size: 0.88rem;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 4px;
}

.pill-list span {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: #ddd;
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.86rem;
}

.toc {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 18px 0 8px;
}

.toc a {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  color: #eee;
}

.faq details {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 10px;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
}

.faq details p {
  color: var(--muted);
  margin-top: 10px;
}

.page-hero {
  padding: 36px 0 10px;
}

.page-hero h1 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 10px;
}

.page-hero p {
  color: var(--muted);
}

.breadcrumb {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

.breadcrumb a {
  color: var(--muted);
}

.site-footer {
  margin-top: 40px;
  border-top: 1px solid var(--line);
  background: rgba(8, 8, 12, 0.9);
  padding: 34px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
  margin-bottom: 22px;
}

.site-footer h3 {
  margin-bottom: 12px;
  font-size: 1rem;
}

.site-footer p,
.site-footer a {
  color: var(--muted);
  font-size: 0.94rem;
}

.site-footer ul {
  list-style: none;
}

.site-footer li {
  margin-bottom: 8px;
}

.copyright {
  border-top: 1px solid var(--line);
  padding-top: 16px;
  color: #777;
  font-size: 0.86rem;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.error-page {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 60px 0;
}

.error-page h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  margin-bottom: 10px;
}

.error-page p {
  color: var(--muted);
  margin-bottom: 22px;
  max-width: 540px;
}

.back-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(20, 20, 28, 0.92);
  color: #fff;
  display: none;
  place-items: center;
  cursor: pointer;
  z-index: 90;
}

.back-top.show {
  display: grid;
}

@media (max-width: 960px) {
  .hero-grid,
  .feature-grid,
  .card-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .shot-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .toc {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .menu-toggle {
    display: inline-flex;
  }

  .nav {
    display: none;
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px;
    background: rgba(11, 11, 15, 0.96);
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: var(--shadow);
    z-index: 120;
  }

  .nav.open {
    display: flex;
    position: absolute;
  }

  .header-inner {
    flex-wrap: nowrap;
  }

  .hero {
    padding-top: 28px;
  }

  .hero-panel img {
    max-height: 420px;
  }

  .shot-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .prose {
    padding: 20px 16px;
  }

  .section {
    padding: 32px 0;
  }
}