:root {
  --bg: #0a0a0c;
  --bg-2: #121218;
  --bg-3: #1a1a24;
  --text: #f2f2f5;
  --muted: #a8a8b8;
  --line: rgba(255, 255, 255, 0.08);
  --pink: #ff2d8a;
  --pink-2: #ff5ca8;
  --coral: #ff6b6b;
  --gold: #e8c07a;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --max: 1120px;
  --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);
  color: var(--text);
  background:
    radial-gradient(900px 420px at 12% -10%, rgba(255, 45, 138, 0.22), transparent 60%),
    radial-gradient(700px 380px at 90% 8%, rgba(255, 107, 107, 0.12), transparent 55%),
    linear-gradient(180deg, #0d0b12 0%, var(--bg) 28%, #09090b 100%);
  line-height: 1.75;
  min-height: 100vh;
}

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

/* 广告图标保持正圆角方形，避免被全局 img 规则拉变形 */
#ads img,
#site-ads-wrap img {
  width: 65px;
  height: 65px;
  max-width: 65px;
  max-height: 65px;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center;
}

a {
  color: var(--pink-2);
  text-decoration: none;
}

a:hover {
  color: #fff;
}

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  background: var(--pink);
  color: #fff;
  padding: 8px 14px;
  z-index: 1000;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  background: rgba(10, 10, 14, 0.82);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
}

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

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: center;
  justify-content: flex-end;
}

.nav a {
  color: var(--muted);
  font-size: 14px;
}

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

.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: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--pink), var(--coral));
  box-shadow: 0 10px 28px rgba(255, 45, 138, 0.35);
}

.btn-ghost {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
}

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

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.25;
  letter-spacing: 0.01em;
}

.hero-lead {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 16px;
  max-width: 36em;
}

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

.hero-note {
  color: var(--muted);
  font-size: 13px;
}

.hero-visual {
  position: relative;
}

.hero-visual img {
  width: 100%;
  border-radius: 18px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}

.age-tip {
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: 10px;
  background: rgba(255, 45, 138, 0.1);
  border: 1px solid rgba(255, 45, 138, 0.25);
  color: var(--muted);
  font-size: 13px;
}

section {
  padding: 42px 0;
}

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

.section-head h2 {
  margin: 0 0 8px;
  font-size: clamp(22px, 3vw, 30px);
}

.section-head p {
  margin: 0;
  color: var(--muted);
  max-width: 48em;
}

.panel {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}

.prose p {
  margin: 0 0 14px;
  color: #d7d7e0;
}

.prose h3 {
  margin: 28px 0 10px;
  font-size: 20px;
}

.prose ul,
.prose ol {
  margin: 0 0 16px;
  padding-left: 1.2em;
  color: #d7d7e0;
}

.prose li {
  margin-bottom: 8px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature-card {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

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

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

.feature-card h3 {
  margin: 0 0 6px;
  font-size: 17px;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.shot-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.shot-item {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
}

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

.shot-item figcaption {
  padding: 10px 12px 12px;
  font-size: 13px;
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: center;
}

.split img {
  border-radius: 14px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.step {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.step .num {
  display: inline-flex;
  width: 28px;
  height: 28px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--pink), var(--coral));
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 10px;
}

.step h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.step p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.faq details {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 10px;
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
}

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

.cta-band {
  margin: 10px 0 40px;
  padding: 28px;
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(255, 45, 138, 0.22), rgba(255, 107, 107, 0.1)),
    var(--bg-2);
  border: 1px solid rgba(255, 45, 138, 0.28);
  text-align: center;
}

.cta-band h2 {
  margin: 0 0 8px;
}

.cta-band p {
  margin: 0 0 16px;
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 34px 0 48px;
  background: rgba(0, 0, 0, 0.35);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr;
  gap: 24px;
}

.site-footer h3 {
  margin: 0 0 12px;
  font-size: 15px;
}

.site-footer p,
.site-footer li {
  color: var(--muted);
  font-size: 14px;
}

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

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

.footer-bottom {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
}

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

.page-hero h1 {
  margin: 0 0 10px;
  font-size: clamp(26px, 3.5vw, 36px);
}

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

.breadcrumb {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 12px;
}

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

.error-page {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 60px 16px;
}

.error-page h1 {
  margin: 0 0 10px;
  font-size: 56px;
  background: linear-gradient(135deg, var(--pink), var(--coral));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.error-page p {
  color: var(--muted);
  margin: 0 0 20px;
}

.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 8px;
}

.toc a {
  font-size: 13px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
}

.toc a:hover {
  color: #fff;
  border-color: rgba(255, 45, 138, 0.4);
}

.menu-toggle {
  display: none;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  color: #fff;
  border-radius: 10px;
  padding: 8px 12px;
}

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

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

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

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

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

  .nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding: 8px 0 4px;
  }

  .nav.open {
    display: flex;
  }

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

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

  .hero {
    padding-top: 28px;
  }

  section {
    padding: 30px 0;
  }
}

@media (max-width: 480px) {
  .feature-grid,
  .shot-grid {
    grid-template-columns: 1fr;
  }

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

/* sticky ads bar sits under header */
.site-header { --header-offset: 64px; }