:root {
  --bg: #0a0a0c;
  --bg-2: #121218;
  --bg-3: #1a1a22;
  --text: #f2f2f5;
  --muted: #9a9aa8;
  --line: rgba(255, 255, 255, 0.08);
  --brand: #e11d2e;
  --brand-2: #ff4d5a;
  --accent: #f5c518;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --font-display: "ZCOOL XiaoWei", "Noto Serif SC", Georgia, serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --max: 1120px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(225, 29, 46, 0.18), transparent 55%),
    radial-gradient(900px 500px at 0% 20%, rgba(245, 197, 24, 0.08), transparent 50%),
    linear-gradient(180deg, #0d0d12 0%, var(--bg) 35%, #08080b 100%);
  line-height: 1.75;
  min-height: 100vh;
}

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

a {
  color: var(--brand-2);
  text-decoration: none;
  transition: color 0.2s ease, opacity 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(16px);
  background: rgba(10, 10, 12, 0.82);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.35rem;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

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

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

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  color: #fff;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  cursor: pointer;
}

.hero {
  position: relative;
  min-height: min(88vh, 820px);
  display: grid;
  align-items: end;
  overflow: hidden;
  isolation: isolate;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transform: scale(1.04);
  animation: heroZoom 18s ease-in-out infinite alternate;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(8, 8, 11, 0.35) 0%, rgba(8, 8, 11, 0.55) 42%, rgba(8, 8, 11, 0.96) 100%),
    linear-gradient(90deg, rgba(8, 8, 11, 0.75), transparent 55%);
}

.hero-content {
  padding: 7rem 0 3.5rem;
  max-width: 720px;
  animation: riseIn 0.9s ease both;
}

.hero-brand {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 7vw, 4.4rem);
  line-height: 1.05;
  margin: 0 0 1rem;
  letter-spacing: 0.04em;
}

.hero-brand span {
  color: var(--brand-2);
}

.hero h1 {
  font-size: clamp(1.15rem, 2.4vw, 1.55rem);
  font-weight: 600;
  margin: 0 0 0.85rem;
  color: #fff;
}

.hero p {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 36rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 48px;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--brand), #ff5a66);
  color: #fff;
}

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

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

.section {
  padding: 4.5rem 0;
}

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

.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.25rem);
  margin: 0 0 0.55rem;
  letter-spacing: 0.03em;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  max-width: 46rem;
}

.feature-grid,
.shot-grid,
.guide-grid {
  display: grid;
  gap: 1rem;
}

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

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

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

.feature-item,
.guide-item,
.prose-box,
.legal-box,
.error-box {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.feature-item h3,
.guide-item h3 {
  margin: 0.85rem 0 0.45rem;
  font-size: 1.1rem;
}

.feature-item p,
.guide-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.feature-item img,
.shot-item img,
.guide-item img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top;
  border-radius: 10px;
  background: var(--bg-3);
}

.shot-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-2);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.shot-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.shot-item figcaption {
  padding: 0.75rem 0.85rem 0.95rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.shot-item a {
  color: #fff;
  font-weight: 600;
}

.prose {
  color: #d7d7e0;
  font-size: 1.02rem;
}

.prose h2,
.prose h3 {
  color: #fff;
  font-family: var(--font-display);
  letter-spacing: 0.02em;
  margin-top: 2rem;
}

.prose h2:first-child,
.prose h3:first-child {
  margin-top: 0;
}

.prose p {
  margin: 0.9rem 0;
}

.prose ul,
.prose ol {
  padding-left: 1.2rem;
  color: var(--muted);
}

.prose li {
  margin: 0.4rem 0;
}

.prose-box + .prose-box {
  margin-top: 1rem;
}

.toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1.25rem 0 0;
}

.toc a {
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.88rem;
  background: rgba(255, 255, 255, 0.03);
}

.toc a:hover {
  color: #fff;
  border-color: rgba(225, 29, 46, 0.45);
}

.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.25rem;
  align-items: stretch;
}

.split img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
  object-position: top;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.steps {
  counter-reset: step;
  display: grid;
  gap: 0.85rem;
}

.steps li {
  list-style: none;
  position: relative;
  padding: 1rem 1rem 1rem 3.2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.02);
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0.9rem;
  top: 1rem;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--brand);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
}

.faq details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.95rem 1.1rem;
  margin-bottom: 0.7rem;
  background: rgba(255, 255, 255, 0.02);
}

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

.faq p {
  margin: 0.7rem 0 0;
  color: var(--muted);
}

.site-footer {
  margin-top: 2rem;
  border-top: 1px solid var(--line);
  background: #07070a;
  padding: 2.5rem 0 2rem;
}

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

.site-footer h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
}

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

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

.site-footer li {
  margin: 0.35rem 0;
}

.copyright {
  margin-top: 1.75rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  color: #6e6e7a;
  font-size: 0.85rem;
}

.page-hero {
  padding: 3.5rem 0 1.5rem;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  margin: 0 0 0.6rem;
}

.page-hero p {
  margin: 0;
  color: var(--muted);
  max-width: 42rem;
}

.legal-box {
  margin-bottom: 1rem;
}

.legal-box h2 {
  margin-top: 0;
  font-size: 1.2rem;
}

.error-wrap {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 3rem 0;
}

.error-box {
  max-width: 560px;
}

.error-box .code {
  font-family: var(--font-display);
  font-size: 4rem;
  color: var(--brand-2);
  line-height: 1;
  margin: 0 0 0.5rem;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@keyframes heroZoom {
  from { transform: scale(1.02); }
  to { transform: scale(1.08); }
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

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

@media (max-width: 720px) {
  .nav-toggle {
    display: inline-grid;
    place-items: center;
  }

  .nav-links {
    display: none;
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: calc(100% + 0.4rem);
    flex-direction: column;
    gap: 0;
    padding: 0.6rem;
    background: rgba(18, 18, 24, 0.98);
    border: 1px solid var(--line);
    border-radius: 12px;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 0.75rem 0.85rem;
    border-radius: 8px;
  }

  .nav-links a:hover {
    background: rgba(255, 255, 255, 0.04);
  }

  .hero-content {
    padding-top: 5.5rem;
  }

  .feature-grid,
  .shot-grid,
  .guide-grid,
  .split,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 3rem 0;
  }

  .feature-item img,
  .shot-item img,
  .guide-item img {
    aspect-ratio: 3 / 4;
  }
}