:root {
  --bg: #0c0c0e;
  --bg-soft: #151518;
  --bg-card: #1a1a1f;
  --line: #2a2a32;
  --text: #f2f2f4;
  --muted: #a8a8b3;
  --accent: #e83e4a;
  --accent-soft: #ff6b75;
  --gold: #f0c14b;
  --max: 1120px;
  --radius: 12px;
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--accent-soft);
  text-decoration: none;
}

a:hover {
  color: #fff;
  text-decoration: underline;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(12, 12, 14, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.15rem;
}

.brand:hover {
  text-decoration: none;
  color: var(--text);
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  align-items: center;
}

.nav a {
  color: var(--muted);
  font-size: 0.95rem;
  text-decoration: none;
}

.nav a:hover,
.nav a.active {
  color: var(--accent-soft);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--text);
  cursor: pointer;
}

.menu-toggle .icon-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.menu-toggle[aria-expanded="true"] .icon-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .icon-bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] .icon-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.hero {
  position: relative;
  padding: 3.5rem 0 2.5rem;
  background:
    radial-gradient(ellipse 80% 60% at 70% 20%, rgba(232, 62, 74, 0.18), transparent 55%),
    linear-gradient(180deg, #121216 0%, var(--bg) 100%);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2rem;
  align-items: center;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.75rem, 4vw, 2.55rem);
  line-height: 1.25;
  letter-spacing: 0.02em;
}

.hero .lead {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 1.5rem;
  max-width: 36em;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.35rem;
  border-radius: 10px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: 0.2s ease;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: #ff525c;
  color: #fff;
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--accent-soft);
  color: var(--accent-soft);
}

.hero-visual {
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
}

.hero-visual img {
  width: 100%;
}

.section {
  padding: 3.25rem 0;
}

.section.alt {
  background: var(--bg-soft);
}

.section-head {
  margin-bottom: 1.75rem;
  max-width: 48rem;
}

.section-head h2 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  line-height: 1.3;
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.feature-card h3 {
  margin: 0 0 0.55rem;
  font-size: 1.1rem;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

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

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

.shot-item img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top;
  background: #111;
}

.shot-item figcaption {
  padding: 0.75rem 0.9rem 1rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.shot-item figcaption strong {
  display: block;
  color: var(--text);
  margin-bottom: 0.25rem;
}

.content-block {
  max-width: 48rem;
}

.content-block h2,
.content-block h3 {
  line-height: 1.35;
  margin-top: 2rem;
}

.content-block h2:first-child {
  margin-top: 0;
}

.content-block p {
  color: #d4d4dc;
  margin: 0.9rem 0;
}

.content-block ul,
.content-block ol {
  color: #d4d4dc;
  padding-left: 1.25rem;
}

.content-block li {
  margin: 0.45rem 0;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

.media-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-card);
}

.media-panel img {
  width: 100%;
}

.faq details {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.9rem 1rem;
  margin-bottom: 0.7rem;
}

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

.faq p {
  margin: 0.7rem 0 0;
  color: var(--muted);
}

.breadcrumb {
  padding: 1rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

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

.page-hero {
  padding: 2rem 0 1rem;
}

.page-hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
}

.page-hero p {
  margin: 0;
  color: var(--muted);
  max-width: 42rem;
}

.legal {
  padding-bottom: 3rem;
}

.legal h2 {
  margin-top: 2rem;
  font-size: 1.25rem;
}

.legal p,
.legal li {
  color: #d0d0d8;
}

.error-page {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 3rem 1rem;
}

.error-page h1 {
  font-size: 4rem;
  margin: 0 0 0.5rem;
  color: var(--accent);
}

.error-page p {
  color: var(--muted);
  margin: 0 0 1.5rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #0a0a0c;
  padding: 2.5rem 0 1.5rem;
  margin-top: 1rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.75rem;
}

.site-footer h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
}

.site-footer p,
.site-footer a {
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer li {
  margin: 0.4rem 0;
}

.copyright {
  border-top: 1px solid var(--line);
  padding-top: 1rem;
  color: #7a7a86;
  font-size: 0.85rem;
}

.toc {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  margin: 1.5rem 0;
}

.toc h2 {
  margin: 0 0 0.65rem;
  font-size: 1.05rem;
}

.toc ol {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.toc a {
  color: var(--accent-soft);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0 0;
}

.tag {
  display: inline-block;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.85rem;
  background: var(--bg-card);
}

.table-wrap {
  overflow-x: auto;
  margin: 1.25rem 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  border: 1px solid var(--line);
  padding: 0.7rem 0.8rem;
  text-align: left;
}

th {
  background: var(--bg-card);
}

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

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

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

@media (max-width: 720px) {
  .menu-toggle {
    display: inline-flex;
    z-index: 3;
  }

  .nav {
    display: none;
  }

  .nav.open {
    display: flex;
    position: absolute;
    top: calc(100% - 0.15rem);
    right: 0;
    left: auto;
    width: min(240px, calc(100vw - 2rem));
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem;
    background: rgba(18, 18, 22, 0.98);
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
    z-index: 2;
  }

  .nav.open a {
    padding: 0.7rem 0.85rem;
    border-radius: 8px;
  }

  .nav.open a:hover,
  .nav.open a.active {
    background: rgba(232, 62, 74, 0.12);
  }

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

  .feature-grid,
  .shot-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 2rem;
  }

  .shot-item img {
    aspect-ratio: 3 / 4;
  }
}