:root {
  --bg: #0a0a0a;
  --bg-2: #141414;
  --bg-3: #1c1c1c;
  --text: #f2f2f2;
  --muted: #9a9a9a;
  --line: #2a2a2a;
  --accent: #3ddc84;
  --accent-2: #c62828;
  --gold: #e6b422;
  --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", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(ellipse at top, rgba(61, 220, 132, 0.08), transparent 45%),
    linear-gradient(180deg, #0d0d0d 0%, var(--bg) 40%, #090909 100%);
  color: var(--text);
  line-height: 1.75;
  min-height: 100vh;
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  color: #7aefae;
}

.container {
  width: min(100% - 32px, var(--max));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(10, 10, 10, 0.88);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  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-links {
  display: flex;
  align-items: center;
  gap: 8px 18px;
  flex-wrap: wrap;
  list-style: none;
}

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

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

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), #1fa85a);
  color: #04140a !important;
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(61, 220, 132, 0.25);
}

.menu-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: 56px 0 36px;
}

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

.eyebrow {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid rgba(61, 220, 132, 0.35);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.85rem;
  margin-bottom: 16px;
  background: rgba(61, 220, 132, 0.08);
}

.hero h1 {
  font-size: clamp(1.8rem, 3.2vw, 2.7rem);
  line-height: 1.25;
  margin-bottom: 16px;
}

.hero-lead {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 24px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 10px;
  font-weight: 700;
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #1fa85a);
  color: #04140a;
}

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

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

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

.hero-visual {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: var(--bg-2);
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  max-height: 560px;
}

.section {
  padding: 48px 0;
}

.section-head {
  margin-bottom: 28px;
}

.section-head h2 {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  margin-bottom: 10px;
}

.section-head p {
  color: var(--muted);
  max-width: 760px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  background: linear-gradient(180deg, var(--bg-3), var(--bg-2));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(61, 220, 132, 0.4);
}

.card img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  max-height: 420px;
}

.card-body {
  padding: 16px 16px 18px;
}

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

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

.feature-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.feature-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px;
  align-items: start;
  padding: 16px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.feature-item img {
  width: 120px;
  border-radius: 10px;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  max-height: 210px;
}

.feature-item h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.feature-item p {
  color: var(--muted);
  font-size: 0.94rem;
}

.content-block {
  background: rgba(20, 20, 20, 0.9);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px;
  margin-bottom: 22px;
}

.content-block h2,
.content-block h3 {
  margin: 0 0 14px;
}

.content-block p {
  color: #d6d6d6;
  margin-bottom: 14px;
}

.content-block ul,
.content-block ol {
  margin: 0 0 14px 1.2em;
  color: #d6d6d6;
}

.content-block li {
  margin-bottom: 8px;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  align-items: start;
}

.shot {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-2);
}

.shot img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  max-height: 520px;
  margin: 0 auto;
}

.shot figcaption {
  padding: 12px 14px;
  color: var(--muted);
  font-size: 0.9rem;
  border-top: 1px solid var(--line);
}

.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 {
  color: var(--accent);
  font-weight: 800;
  margin-bottom: 8px;
}

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

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

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

.cta-band {
  margin: 20px 0 40px;
  padding: 28px;
  border-radius: 16px;
  background:
    linear-gradient(120deg, rgba(61, 220, 132, 0.16), rgba(198, 40, 40, 0.12)),
    var(--bg-2);
  border: 1px solid rgba(61, 220, 132, 0.25);
  text-align: center;
}

.cta-band h2 {
  margin-bottom: 10px;
}

.cta-band p {
  color: var(--muted);
  margin-bottom: 18px;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 36px 0 28px;
  background: #070707;
  margin-top: 20px;
}

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

.site-footer h3 {
  margin-bottom: 12px;
  font-size: 1rem;
}

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

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

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

.copyright {
  border-top: 1px solid var(--line);
  padding-top: 16px;
  color: #777;
  font-size: 0.88rem;
}

.page-hero {
  padding: 42px 0 18px;
}

.page-hero h1 {
  font-size: clamp(1.6rem, 2.8vw, 2.2rem);
  margin-bottom: 10px;
}

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

.breadcrumb {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 12px;
}

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

.legal {
  padding-bottom: 50px;
}

.legal .content-block h2 {
  font-size: 1.2rem;
  color: var(--accent);
}

.error-page {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 60px 0;
}

.error-page .code {
  font-size: 4.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 10px;
}

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

.error-page p {
  color: var(--muted);
  margin-bottom: 22px;
}

.toc {
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  margin-bottom: 22px;
}

.toc h2 {
  font-size: 1rem;
  margin-bottom: 10px;
}

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

.toc li {
  margin-bottom: 6px;
}

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

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

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

  .feature-item {
    grid-template-columns: 90px 1fr;
  }

  .feature-item img {
    width: 90px;
  }
}

@media (max-width: 720px) {
  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav-links {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 68px;
    flex-direction: column;
    align-items: stretch;
    background: rgba(15, 15, 15, 0.98);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 12px;
    gap: 4px;
  }

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

  .nav-links a {
    padding: 10px 12px;
    border-radius: 8px;
  }

  .nav-links a:hover {
    background: var(--bg-3);
  }

  .nav-cta {
    width: 100%;
    margin-top: 6px;
  }

  .hero {
    padding-top: 28px;
  }

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

  .content-block {
    padding: 18px;
  }

  .hero-visual img,
  .card img,
  .shot img {
    max-height: none;
  }
}