:root {
  --bg: #0b0c12;
  --bg-soft: #13151f;
  --bg-card: #181b28;
  --line: rgba(255, 255, 255, 0.08);
  --text: #f3f4f8;
  --muted: #9aa3b5;
  --accent: #e84d8a;
  --accent-2: #7b5cff;
  --accent-3: #ff8a4c;
  --gradient: linear-gradient(135deg, #7b5cff 0%, #e84d8a 48%, #ff8a4c 100%);
  --radius: 16px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  --container: 1120px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(123, 92, 255, 0.22), transparent 60%),
    radial-gradient(900px 500px at 90% 0%, rgba(232, 77, 138, 0.18), transparent 55%),
    radial-gradient(800px 400px at 50% 100%, rgba(255, 138, 76, 0.1), transparent 50%),
    var(--bg);
  line-height: 1.75;
  min-height: 100vh;
}

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

a {
  color: #ffb3d0;
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  color: #fff;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  background: rgba(11, 12, 18, 0.82);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  align-items: center;
}

.nav a {
  color: var(--muted);
  font-size: 0.95rem;
}

.nav a:hover,
.nav a.active {
  color: #fff;
}

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

.menu-toggle svg {
  width: 22px;
  height: 22px;
  display: block;
}

.hero {
  padding: 64px 0 40px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 36px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(232, 77, 138, 0.12);
  border: 1px solid rgba(232, 77, 138, 0.28);
  color: #ffb3d0;
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(1.8rem, 3.4vw, 2.7rem);
  line-height: 1.25;
  letter-spacing: 0.01em;
}

.hero-lead {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 24px;
  max-width: 38em;
}

.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 20px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 10px 30px rgba(232, 77, 138, 0.28);
}

.btn-primary:hover {
  color: #fff;
  opacity: 0.95;
}

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

.hero-meta {
  color: var(--muted);
  font-size: 0.9rem;
}

.hero-visual {
  position: relative;
}

.phone-frame {
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: #000;
}

.phone-frame img {
  width: 100%;
}

.section {
  padding: 56px 0;
}

.section-head {
  margin-bottom: 28px;
  max-width: 48em;
}

.section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(1.4rem, 2.4vw, 2rem);
}

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

.prose {
  color: #d7dbe6;
  font-size: 1.02rem;
}

.prose p {
  margin: 0 0 1.1em;
}

.prose h2,
.prose h3 {
  color: #fff;
  margin: 1.6em 0 0.7em;
  line-height: 1.35;
}

.prose ul,
.prose ol {
  padding-left: 1.2em;
  margin: 0 0 1.1em;
}

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

.feature-grid,
.shot-grid,
.info-grid {
  display: grid;
  gap: 18px;
}

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

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

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

.card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent 40%), var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.card-body {
  padding: 18px 18px 20px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.shot-card img {
  aspect-ratio: 9 / 16;
  object-fit: cover;
  width: 100%;
  background: #000;
}

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

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: center;
}

.split.reverse .split-text {
  order: 2;
}

.split.reverse .split-media {
  order: 1;
}

.split-media {
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: #000;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
}

.tag {
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(123, 92, 255, 0.12);
  border: 1px solid rgba(123, 92, 255, 0.25);
  color: #d8d0ff;
  font-size: 0.86rem;
}

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

.toc h2 {
  margin: 0 0 10px;
  font-size: 1.05rem;
}

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

.toc a {
  color: #ffb3d0;
}

.page-hero {
  padding: 48px 0 20px;
}

.page-hero h1 {
  margin: 0 0 12px;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
}

.page-hero p {
  margin: 0;
  color: var(--muted);
  max-width: 46em;
}

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

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

.content-panel {
  background: rgba(24, 27, 40, 0.72);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 28px 28px 12px;
  margin-bottom: 40px;
}

.related {
  margin: 36px 0 10px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.related h2 {
  margin: 0 0 12px;
  font-size: 1.15rem;
}

.related ul {
  margin: 0;
  padding-left: 1.15em;
  color: var(--muted);
}

.site-footer {
  margin-top: 40px;
  border-top: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.28);
  padding: 36px 0 28px;
}

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

.footer-brand {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.footer-brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.footer-brand strong {
  display: block;
  margin-bottom: 6px;
}

.footer-brand p,
.footer-col p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-col h3 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.footer-col a {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
  font-size: 0.92rem;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  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(3.5rem, 10vw, 6rem);
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
  margin-bottom: 12px;
}

.error-page h1 {
  margin: 0 0 12px;
}

.error-page p {
  color: var(--muted);
  margin: 0 0 24px;
}

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

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

.faq details p {
  margin: 10px 0 0;
  color: var(--muted);
}

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

  .split.reverse .split-text,
  .split.reverse .split-media {
    order: initial;
  }

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

  .menu-toggle {
    display: inline-flex;
  }

  .header-inner {
    position: relative;
    flex-wrap: nowrap;
    min-height: 64px;
    padding: 10px 0;
  }

  .nav {
    display: none;
  }

  .nav.open {
    display: flex;
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    left: auto;
    z-index: 60;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: min(220px, calc(100vw - 32px));
    padding: 8px;
    border-radius: 14px;
    border: 1px solid var(--line);
    background: rgba(18, 20, 30, 0.96);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(12px);
  }

  .nav.open a {
    display: block;
    padding: 10px 12px;
    border-radius: 10px;
  }

  .nav.open a:hover,
  .nav.open a.active {
    background: rgba(255, 255, 255, 0.06);
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: 36px;
  }

  .section {
    padding: 42px 0;
  }

  .content-panel {
    padding: 20px 16px 8px;
  }

  .shot-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .cta-row {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}