:root {
  --bg: #0a0a0c;
  --bg-soft: #141418;
  --bg-card: #1a1a20;
  --text: #f2f2f5;
  --muted: #9a9aa6;
  --accent: #e6282e;
  --accent-soft: #ff4d55;
  --line: rgba(255, 255, 255, 0.08);
  --radius: 14px;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
  --max: 1180px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(230, 40, 46, 0.18), transparent 55%),
    radial-gradient(900px 420px at 90% 0%, rgba(255, 120, 80, 0.12), transparent 50%),
    var(--bg);
  color: var(--text);
  line-height: 1.75;
  min-height: 100vh;
}

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

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

a:hover {
  color: #fff;
}

ul {
  list-style: none;
}

.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, 12, 0.86);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  flex-shrink: 0;
}

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

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.brand-text span {
  font-size: 0.78rem;
  color: var(--muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a {
  color: var(--muted);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.95rem;
}

.nav a:hover,
.nav a.active {
  color: #fff;
  background: rgba(230, 40, 46, 0.16);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-soft);
  color: #fff;
  cursor: pointer;
  padding: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

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

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

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

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

.hero {
  position: relative;
  overflow: hidden;
  padding: 56px 0 40px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 36px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-soft);
  font-size: 0.92rem;
  margin-bottom: 14px;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1.25;
  margin-bottom: 16px;
}

.hero-lead {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 560px;
  margin-bottom: 28px;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 22px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.98rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #ff6a3d);
  color: #fff;
  box-shadow: 0 10px 24px rgba(230, 40, 46, 0.28);
}

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

.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--line);
  color: #fff;
}

.hero-note {
  color: var(--muted);
  font-size: 0.9rem;
}

.hero-visual {
  position: relative;
}

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

.section {
  padding: 56px 0;
}

.section-head {
  margin-bottom: 28px;
  max-width: 760px;
}

.section-head h2 {
  font-size: clamp(1.55rem, 2.6vw, 2.1rem);
  margin-bottom: 10px;
}

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

.section.alt {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), transparent);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.feature-grid,
.shot-grid,
.category-grid,
.step-grid,
.faq-grid {
  display: grid;
  gap: 18px;
}

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

.feature-card,
.content-card,
.step-card,
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}

.feature-card h3,
.step-card h3,
.content-card h3,
.faq-item h3 {
  font-size: 1.12rem;
  margin-bottom: 10px;
}

.feature-card p,
.step-card p,
.content-card p,
.faq-item p,
.prose p {
  color: var(--muted);
}

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

.shot-card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.shot-card:hover {
  transform: translateY(-4px);
  border-color: rgba(230, 40, 46, 0.45);
}

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

.shot-card .caption {
  padding: 14px 14px 16px;
}

.shot-card .caption strong {
  display: block;
  margin-bottom: 6px;
  font-size: 0.98rem;
}

.shot-card .caption span {
  color: var(--muted);
  font-size: 0.88rem;
}

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

.category-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 18px;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  padding: 12px;
}

.category-item img {
  width: 140px;
  height: 240px;
  object-fit: cover;
  object-position: top;
  border-radius: 10px;
}

.category-item h3 {
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.category-item p {
  color: var(--muted);
  font-size: 0.95rem;
}

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

.step-num {
  display: inline-flex;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(230, 40, 46, 0.18);
  color: var(--accent-soft);
  font-weight: 700;
  margin-bottom: 12px;
}

.prose {
  display: grid;
  gap: 18px;
}

.prose h2,
.prose h3 {
  color: #fff;
}

.prose h2 {
  font-size: 1.7rem;
  margin-top: 10px;
}

.prose h3 {
  font-size: 1.2rem;
  margin-top: 4px;
}

.prose ul {
  display: grid;
  gap: 8px;
  padding-left: 18px;
}

.prose li {
  list-style: disc;
  color: var(--muted);
}

.prose li::marker {
  color: var(--accent);
}

.two-col {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: start;
}

.phone-stack {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.phone-stack img {
  border-radius: 16px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top;
}

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

.breadcrumb {
  padding: 22px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

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

.page-hero {
  padding: 34px 0 10px;
}

.page-hero h1 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: 10px;
}

.page-hero p {
  color: var(--muted);
  max-width: 720px;
}

.legal-content {
  padding: 20px 0 70px;
}

.legal-box {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
}

.legal-box h2 {
  font-size: 1.25rem;
  margin: 22px 0 10px;
}

.legal-box h2:first-child {
  margin-top: 0;
}

.legal-box p,
.legal-box li {
  color: var(--muted);
  margin-bottom: 12px;
}

.legal-box ul {
  padding-left: 18px;
  margin-bottom: 12px;
}

.legal-box li {
  list-style: disc;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #08080a;
  padding: 42px 0 28px;
  margin-top: 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 28px;
  margin-bottom: 28px;
}

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

.footer-grid p,
.footer-grid a {
  color: var(--muted);
  font-size: 0.94rem;
}

.footer-grid ul {
  display: grid;
  gap: 8px;
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 18px;
  color: var(--muted);
  font-size: 0.88rem;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  justify-content: space-between;
}

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

.error-page h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  margin-bottom: 12px;
}

.error-page p {
  color: var(--muted);
  margin-bottom: 24px;
  max-width: 520px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.tag-list a {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  color: var(--muted);
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.88rem;
}

.tag-list a:hover {
  border-color: rgba(230, 40, 46, 0.5);
  color: #fff;
}

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

  .feature-grid,
  .faq-grid,
  .category-grid {
    grid-template-columns: 1fr 1fr;
  }

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

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

  .nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px 16px 18px;
    background: rgba(12, 12, 16, 0.98);
    border-bottom: 1px solid var(--line);
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 12px 14px;
  }

  .hero {
    padding-top: 28px;
  }

  .feature-grid,
  .faq-grid,
  .category-grid,
  .shot-grid,
  .step-grid,
  .phone-stack {
    grid-template-columns: 1fr;
  }

  .category-item {
    grid-template-columns: 110px 1fr;
    gap: 12px;
  }

  .category-item img {
    width: 110px;
    height: 190px;
  }

  .legal-box {
    padding: 20px;
  }

  .section {
    padding: 40px 0;
  }
}