:root {
  --bg: #0b0b0f;
  --bg-soft: #14141c;
  --bg-card: #1a1a24;
  --text: #f5f5f7;
  --text-muted: #a8a8b3;
  --line: rgba(255, 255, 255, 0.08);
  --brand: #ff2d55;
  --brand-2: #ff8a00;
  --grad: linear-gradient(135deg, #ffb020 0%, #ff5a3d 45%, #ff2d7a 100%);
  --radius: 14px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
  --max: 1140px;
  --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: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
}

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

a {
  color: #ff8fb0;
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  color: #ffd1df;
}

ul,
ol {
  padding-left: 1.25rem;
}

li {
  margin: 0.35rem 0;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 11, 15, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text);
  font-weight: 700;
  font-size: 1.1rem;
}

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

.nav {
  display: flex;
  align-items: center;
  gap: 0.35rem 1rem;
  flex-wrap: wrap;
}

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

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

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--text);
  border-radius: 10px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

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

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

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

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

.hero {
  position: relative;
  overflow: hidden;
  padding: 4.5rem 0 3.5rem;
  background:
    radial-gradient(ellipse at top right, rgba(255, 45, 85, 0.22), transparent 45%),
    radial-gradient(ellipse at left center, rgba(255, 138, 0, 0.16), transparent 40%),
    var(--bg);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 45, 85, 0.12);
  color: #ff8fb0;
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  line-height: 1.25;
  margin-bottom: 1rem;
  letter-spacing: 0.02em;
}

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

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 46px;
  padding: 0.7rem 1.25rem;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
}

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

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

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

.btn-ghost:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.24);
}

.hero-note {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.hero-visual {
  position: relative;
}

.hero-visual img {
  width: 100%;
  border-radius: 22px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: auto -8% -8% auto;
  width: 46%;
  height: 46%;
  background: var(--grad);
  filter: blur(60px);
  opacity: 0.35;
  z-index: -1;
}

.section {
  padding: 3.5rem 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent);
}

.section-head {
  margin-bottom: 1.75rem;
  max-width: 46rem;
}

.section-head h2 {
  font-size: clamp(1.45rem, 3vw, 2rem);
  margin-bottom: 0.7rem;
}

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

.prose {
  color: var(--text-muted);
}

.prose h2,
.prose h3,
.prose h4 {
  color: var(--text);
  margin: 1.75rem 0 0.8rem;
  line-height: 1.4;
}

.prose h2 {
  font-size: 1.55rem;
}

.prose h3 {
  font-size: 1.25rem;
}

.prose p {
  margin: 0.85rem 0;
}

.prose strong {
  color: #fff;
  font-weight: 600;
}

.feature-grid,
.cat-grid,
.shot-grid,
.card-grid {
  display: grid;
  gap: 1.25rem;
}

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

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

.card h3 {
  font-size: 1.08rem;
  margin-bottom: 0.55rem;
}

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

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

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

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

.cat-card .body {
  padding: 0.9rem 1rem 1.1rem;
}

.cat-card h3 {
  font-size: 1rem;
  margin-bottom: 0.35rem;
}

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

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

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

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

.shot-card .cap {
  padding: 0.85rem 1rem 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

.split.reverse {
  grid-template-columns: 0.95fr 1.05fr;
}

.split img {
  border-radius: 18px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
}

.steps li {
  counter-increment: step;
  position: relative;
  padding: 1rem 1rem 1rem 3.4rem;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 0.8rem;
  color: var(--text-muted);
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 1rem;
  top: 1rem;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  background: var(--grad);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.faq details {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  margin-bottom: 0.75rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq details p {
  color: var(--text-muted);
  margin-top: 0.75rem;
}

.toc {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.25rem;
  margin: 1.5rem 0 2rem;
}

.toc h2 {
  font-size: 1.05rem;
  margin-bottom: 0.6rem;
}

.toc ol {
  columns: 2;
  gap: 1.5rem;
}

.page-hero {
  padding: 3rem 0 1.5rem;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(ellipse at top left, rgba(255, 138, 0, 0.14), transparent 40%),
    var(--bg);
}

.page-hero h1 {
  font-size: clamp(1.7rem, 3.5vw, 2.3rem);
  margin-bottom: 0.6rem;
}

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

.legal {
  padding: 2.5rem 0 4rem;
}

.legal .prose {
  max-width: 48rem;
}

.error-page {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 4rem 1rem;
}

.error-page h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 0.8rem;
}

.error-page p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  max-width: 28rem;
  margin-left: auto;
  margin-right: auto;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #08080c;
  padding: 2.5rem 0 2rem;
  margin-top: 2rem;
}

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

.site-footer h3 {
  margin-bottom: 0.7rem;
  font-size: 1rem;
}

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

.site-footer a {
  display: block;
  margin: 0.35rem 0;
}

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

.footer-bottom {
  margin-top: 1.75rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--text-muted);
  font-size: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  justify-content: space-between;
}

.age-tag {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
  background: rgba(255, 45, 85, 0.15);
  color: #ff8fb0;
  font-size: 0.8rem;
}

.cta-band {
  margin: 1rem 0 0;
  padding: 1.5rem;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(255, 138, 0, 0.16), rgba(255, 45, 122, 0.18));
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.cta-band h3 {
  margin-bottom: 0.5rem;
}

.cta-band p {
  color: var(--text-muted);
  margin-bottom: 1rem;
}

@media (max-width: 980px) {
  .hero-grid,
  .split,
  .split.reverse,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

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

  .toc ol {
    columns: 1;
  }
}

@media (max-width: 720px) {
  .menu-toggle {
    display: inline-flex;
    z-index: 2;
  }

  .nav {
    display: none;
  }

  .nav.open {
    display: flex;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    left: auto;
    width: min(78vw, 260px);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.55rem;
    background: rgba(20, 20, 28, 0.98);
    border: 1px solid var(--line);
    border-radius: 14px;
    box-shadow: var(--shadow);
    z-index: 120;
  }

  .nav.open a {
    padding: 0.75rem 0.85rem;
    border-radius: 10px;
  }

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

  .header-inner {
    flex-wrap: nowrap;
    min-height: 60px;
  }

  .hero {
    padding: 2.5rem 0 2rem;
  }

  .section {
    padding: 2.5rem 0;
  }

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

  .cat-card img,
  .shot-card img {
    aspect-ratio: 3 / 4;
  }
}