:root {
  --bg: #0b0c10;
  --bg-soft: #14161c;
  --bg-card: #1a1d26;
  --line: #2a2e3a;
  --text: #f2f3f7;
  --muted: #a7adbb;
  --accent: #e11d48;
  --accent-soft: #fb7185;
  --gold: #f59e0b;
  --radius: 14px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  --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 600px at 10% -10%, rgba(225, 29, 72, 0.18), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(245, 158, 11, 0.08), transparent 50%),
    var(--bg);
  color: var(--text);
  line-height: 1.75;
  min-height: 100vh;
}

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

a {
  color: var(--accent-soft);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #fff;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 8px 14px;
  z-index: 1000;
}

.skip-link:focus {
  left: 12px;
  top: 12px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(11, 12, 16, 0.88);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  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;
  object-fit: cover;
}

.brand span {
  background: linear-gradient(90deg, #fff, var(--accent-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.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;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: #fff;
  border-radius: 10px;
  width: 42px;
  height: 42px;
  cursor: pointer;
  font-size: 1.2rem;
}

/* Hero */
.hero {
  padding: 56px 0 28px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 28px;
  align-items: center;
}

.hero-copy h1 {
  font-size: clamp(1.8rem, 3.4vw, 2.7rem);
  line-height: 1.25;
  margin-bottom: 16px;
}

.hero-copy .lead {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 22px;
  max-width: 36em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #be123c);
  color: #fff;
  box-shadow: 0 8px 24px rgba(225, 29, 72, 0.35);
}

.btn-primary:hover {
  color: #fff;
  filter: brightness(1.08);
}

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

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero-tags span {
  font-size: 0.82rem;
  color: var(--muted);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
}

.hero-visual {
  position: relative;
  border-radius: 22px;
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  background: var(--bg-card);
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: top center;
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 42%;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.75));
  pointer-events: none;
}

/* Sections */
.section {
  padding: 42px 0;
}

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

.section-head h2 {
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  margin-bottom: 8px;
}

.section-head p {
  color: var(--muted);
  max-width: 48em;
}

.panel {
  background: rgba(26, 29, 38, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

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

.card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: top center;
  background: #111;
}

.card-body {
  padding: 14px 14px 16px;
}

.card-body h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.card-body p {
  color: var(--muted);
  font-size: 0.9rem;
}

.feature-list {
  list-style: none;
  display: grid;
  gap: 12px;
}

.feature-list li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 10px;
  align-items: start;
  padding: 12px;
  border-radius: 12px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
}

.feature-list .num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(225, 29, 72, 0.18);
  color: var(--accent-soft);
  font-size: 0.85rem;
  font-weight: 700;
}

.prose h2,
.prose h3 {
  margin: 1.4em 0 0.6em;
  line-height: 1.35;
}

.prose p {
  margin-bottom: 1em;
  color: #d7dae3;
}

.prose ul,
.prose ol {
  margin: 0 0 1.1em 1.2em;
  color: #d7dae3;
}

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

.prose strong {
  color: #fff;
}

.toc {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin: 18px 0 28px;
}

.toc h2 {
  font-size: 1.05rem;
  margin-bottom: 10px;
}

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

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

.shot-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 16px;
  align-items: start;
  margin: 18px 0;
  padding: 14px;
  border-radius: 14px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
}

.shot-row img {
  width: 100%;
  border-radius: 12px;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: top center;
}

.shot-row h3 {
  margin-top: 0;
  font-size: 1.05rem;
}

.shot-row p {
  margin-bottom: 0.5em;
}

.category-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 8px;
}

.category-chips a {
  background: var(--bg-card);
  border: 1px solid var(--line);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.9rem;
}

.category-chips a:hover {
  border-color: var(--accent);
  color: #fff;
}

.stat-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 18px;
}

.stat {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  text-align: center;
}

.stat b {
  display: block;
  font-size: 1.25rem;
  color: var(--accent-soft);
}

.stat span {
  color: var(--muted);
  font-size: 0.85rem;
}

.page-hero {
  padding: 40px 0 10px;
}

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

.page-hero p {
  color: var(--muted);
  max-width: 46em;
}

.breadcrumb {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 14px;
}

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

.breadcrumb a:hover {
  color: #fff;
}

.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;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent), var(--gold));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 10px;
}

.error-page h1 {
  margin-bottom: 12px;
}

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

/* Footer */
.site-footer {
  margin-top: 40px;
  border-top: 1px solid var(--line);
  background: #090a0e;
  padding: 36px 0 24px;
}

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

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

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

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

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

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

.site-footer a:hover {
  color: #fff;
}

.copyright {
  border-top: 1px solid var(--line);
  padding-top: 16px;
  color: #7d8496;
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
}

/* Mobile */
@media (max-width: 960px) {
  .hero-grid,
  .grid-2,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .grid-3,
  .grid-4,
  .stat-bar {
    grid-template-columns: 1fr 1fr;
  }

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

  .shot-row img {
    max-width: 280px;
    margin: 0 auto;
  }

  .menu-toggle {
    display: inline-grid;
    place-items: center;
  }

  .nav {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 68px;
    flex-direction: column;
    align-items: stretch;
    background: rgba(20, 22, 28, 0.98);
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 10px;
    box-shadow: var(--shadow);
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 12px 14px;
  }

  .header-inner {
    position: relative;
  }
}

@media (max-width: 560px) {
  .grid-3,
  .grid-4,
  .stat-bar {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 28px;
  }

  .hero-visual img {
    aspect-ratio: 3 / 3.6;
  }
}