:root {
  --bg: #0b0b0d;
  --bg-2: #141418;
  --bg-3: #1c1c22;
  --text: #f2f2f4;
  --muted: #a8a8b3;
  --line: #2a2a33;
  --accent: #e11d48;
  --accent-2: #22c55e;
  --max: 1120px;
  --radius: 12px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(225, 29, 72, 0.18), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(34, 197, 94, 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: #fda4af;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #fff;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(11, 11, 13, 0.86);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

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

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

.nav a {
  color: var(--muted);
  font-size: 0.95rem;
  padding: 0.35rem 0;
  border-bottom: 2px solid transparent;
}

.nav a:hover,
.nav a.active {
  color: #fff;
  border-bottom-color: var(--accent);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-2);
  color: var(--text);
  cursor: pointer;
  font-size: 1.2rem;
}

.hero {
  padding: 3.5rem 0 2.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 2.5rem;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  color: var(--accent-2);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.hero h1 {
  font-size: clamp(1.8rem, 3.2vw, 2.7rem);
  line-height: 1.25;
  margin-bottom: 1rem;
}

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

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 1.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  font-weight: 700;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, #e11d48, #be123c);
  color: #fff;
}

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

.btn-secondary {
  background: var(--bg-3);
  border-color: var(--line);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: #555;
  color: #fff;
}

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

.hero-visual {
  position: relative;
}

.phone-frame {
  background: linear-gradient(180deg, #22222a, #121216);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 0.7rem;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.phone-frame img {
  width: 100%;
  border-radius: 20px;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top;
}

.section {
  padding: 3rem 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(20, 20, 24, 0.85), rgba(11, 11, 13, 0.4));
  border-block: 1px solid var(--line);
}

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

.section-head h2 {
  font-size: clamp(1.45rem, 2.4vw, 2rem);
  margin-bottom: 0.65rem;
}

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

.prose {
  color: #d7d7de;
  font-size: 1.02rem;
}

.prose p {
  margin-bottom: 1.05rem;
}

.prose h2,
.prose h3 {
  color: #fff;
  margin: 1.8rem 0 0.85rem;
}

.prose ul,
.prose ol {
  margin: 0 0 1.1rem 1.2rem;
  color: #d7d7de;
}

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

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

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

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

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

.feature-card,
.step-card {
  padding: 1.25rem;
}

.feature-card h3,
.step-card h3,
.shot-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.feature-card p,
.step-card p,
.shot-card p {
  color: var(--muted);
  font-size: 0.95rem;
}

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

.shot-card .cap {
  padding: 0.9rem 1rem 1.1rem;
}

.step-num {
  display: inline-flex;
  width: 2rem;
  height: 2rem;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(225, 29, 72, 0.15);
  color: #fb7185;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.media-row {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 1.5rem;
  align-items: center;
  margin: 1.75rem 0;
}

.media-row.reverse {
  grid-template-columns: 1.1fr 0.9fr;
}

.media-row.reverse .media-copy {
  order: -1;
}

.media-frame {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-3);
  box-shadow: var(--shadow);
}

.media-frame img {
  width: 100%;
  aspect-ratio: 9 / 17;
  object-fit: cover;
  object-position: top;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1rem 0 0.25rem;
}

.tag {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: var(--bg-3);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.86rem;
}

.faq details {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.95rem 1.1rem;
  margin-bottom: 0.75rem;
}

.faq summary {
  cursor: pointer;
  font-weight: 650;
  color: #fff;
}

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

.cta-band {
  text-align: center;
  padding: 2.5rem 1.25rem;
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(225, 29, 72, 0.2), rgba(34, 197, 94, 0.08)),
    var(--bg-2);
  border: 1px solid var(--line);
}

.cta-band h2 {
  margin-bottom: 0.7rem;
}

.cta-band p {
  color: var(--muted);
  margin-bottom: 1.2rem;
}

.site-footer {
  margin-top: 2rem;
  border-top: 1px solid var(--line);
  background: #09090b;
  padding: 2.5rem 0 1.5rem;
}

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

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

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

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

.site-footer li {
  margin-bottom: 0.45rem;
}

.copyright {
  border-top: 1px solid var(--line);
  padding-top: 1rem;
  color: #7d7d88;
  font-size: 0.86rem;
  text-align: center;
}

.page-hero {
  padding: 2.5rem 0 1.25rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1.5rem;
}

.page-hero h1 {
  font-size: clamp(1.6rem, 2.8vw, 2.2rem);
  margin-bottom: 0.55rem;
}

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

.breadcrumb {
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 0.85rem;
}

.breadcrumb a {
  color: #c4c4cf;
}

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

.error-page h1 {
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  margin-bottom: 0.5rem;
}

.error-page p {
  color: var(--muted);
  margin-bottom: 1.25rem;
}

.toc {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.15rem;
  margin-bottom: 1.5rem;
}

.toc strong {
  display: block;
  margin-bottom: 0.55rem;
}

.toc a {
  display: inline-block;
  margin: 0.2rem 0.75rem 0.2rem 0;
  color: #fda4af;
}

@media (max-width: 960px) {
  .hero-grid,
  .media-row,
  .media-row.reverse,
  .footer-grid,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .media-row.reverse .media-copy {
    order: 0;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

  .phone-frame {
    max-width: 360px;
    margin-inline: auto;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav {
    display: none;
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: 68px;
    flex-direction: column;
    align-items: stretch;
    background: #15151a;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 0.75rem;
    box-shadow: var(--shadow);
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 0.7rem 0.6rem;
    border-bottom: none;
    border-radius: 8px;
  }

  .nav a:hover,
  .nav a.active {
    background: var(--bg-3);
    border-bottom-color: transparent;
  }

  .hero {
    padding-top: 2rem;
  }

  .section {
    padding: 2.2rem 0;
  }

  .shot-grid-mobile {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
  }
}

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

  .cta-row .btn {
    width: 100%;
  }
}