/* ========== CSS Variables ========== */
:root {
  --color-bg: #FAF7F2;
  --color-card: #FFFFFF;
  --color-surface: #F2EEE6;
  --color-text-primary: #1A1A1A;
  --color-text-secondary: #5C5852;
  --color-text-tertiary: #9C9690;
  --color-border: #EAE5DC;
  --color-brand: #C9A96E;
  --color-brand-hover: #A88550;
  --color-brand-light: #F5EDDB;
  --font-serif: 'Noto Serif SC', serif;
  --font-sans: 'Noto Sans SC', sans-serif;
  --container-max: 1200px;
  --spacing-section: 96px;
  --radius-card: 12px;
  --radius-btn: 6px;
}

/* ========== Reset ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ========== Container ========== */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
}

/* ========== Utility ========== */
.section { padding: var(--spacing-section) 0; }
.section-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-brand);
  margin-bottom: 12px;
}
.section-title {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin-bottom: 16px;
}
.section-subtitle {
  font-size: 15px;
  color: var(--color-text-secondary);
  max-width: 520px;
  line-height: 1.7;
}

/* ========== Cards ========== */
.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 32px;
}

/* ========== Buttons ========== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-brand);
  color: #fff;
  border: none;
  border-radius: var(--radius-btn);
  padding: 14px 28px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}
.btn-primary:hover { background: var(--color-brand-hover); }
.btn-primary:active { transform: scale(0.98); }

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--color-brand);
  border: 1px solid var(--color-brand);
  border-radius: var(--radius-btn);
  padding: 14px 28px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}
.btn-outline:hover { background: var(--color-brand-light); }
.btn-outline:active { transform: scale(0.98); }

/* ========== Animations ========== */
/* JS adds .visible class; CSS transition handles the fade-in */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== Nav ========== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 247, 242, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.nav-inner {
  display: flex;
  align-items: center;
  height: 64px;
  gap: 40px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.nav-logo-icon { width: 28px; height: 28px; }
.nav-logo-text {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  flex: 1;
}
.nav-links a {
  font-size: 14px;
  color: var(--color-text-secondary);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--color-brand); }
.nav-cta {
  padding: 10px 20px;
  font-size: 14px;
  flex-shrink: 0;
}

/* ========== Hero ========== */
.hero {
  padding-top: 48px;
  padding-bottom: 96px;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.hero-content { max-width: 520px; }
.hero-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-brand);
  margin-bottom: 16px;
}
.hero-title {
  font-family: var(--font-serif);
  font-size: 52px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--color-text-primary);
  margin-bottom: 20px;
}
.hero-desc {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.hero-btn { font-size: 14px; padding: 12px 24px; }
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-phone {
  width: 280px;
  border: 1px solid var(--color-border);
  border-radius: 24px;
  overflow: hidden;
  padding: 8px;
  background: var(--color-card);
}
.hero-phone img {
  width: 100%;
  aspect-ratio: 2/3;
  object-fit: cover;
  border-radius: 16px;
}

/* ========== Pain Points ========== */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}
.pain-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  text-align: center;
}
.pain-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-brand-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 22px;
  color: var(--color-brand);
}
.pain-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}
.pain-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}
.pain-punchline {
  text-align: center;
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 500;
  color: var(--color-text-primary);
  line-height: 1.6;
  letter-spacing: -0.01em;
}

/* ========== Features ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.feature-card { text-align: center; }
.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--color-brand-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 26px;
  color: var(--color-brand);
}
.feature-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}
.feature-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ========== Templates ========== */
.templates-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.template-card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: border-color 0.2s;
}
.template-card:hover { border-color: var(--color-brand); }
.template-img {
  position: relative;
  aspect-ratio: 3/4;
  overflow: hidden;
}
.template-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.template-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--color-card);
  color: var(--color-brand);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: 9999px;
}
.template-info { padding: 16px 20px 20px; }
.template-name {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}
.template-desc {
  font-size: 12px;
  color: var(--color-text-tertiary);
}

/* ========== Workflow ========== */
.workflow-steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 24px;
  margin-top: 48px;
}
.workflow-step {
  flex: 1;
  max-width: 280px;
  text-align: center;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 40px 24px;
}
.step-number {
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-brand);
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}
.step-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-brand-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 26px;
  color: var(--color-brand);
}
.step-title {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}
.step-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}
.workflow-arrow {
  display: flex;
  align-items: center;
  padding-top: 64px;
  font-size: 24px;
  color: var(--color-text-tertiary);
}

/* ========== Offline ========== */
.offline-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.offline-list {
  list-style: none;
  margin-top: 24px;
}
.offline-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--color-text-secondary);
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}
.offline-list li:last-child { border-bottom: none; }
.offline-list li i {
  font-size: 18px;
  color: var(--color-brand);
  flex-shrink: 0;
}
.offline-graphic {
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: var(--color-brand-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  font-size: 96px;
  color: var(--color-brand);
}

/* ========== Download CTA ========== */
.download-card {
  background: var(--color-text-primary);
  border-radius: var(--radius-card);
  padding: 64px;
  text-align: center;
}
.download-title {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 12px;
}
.download-desc {
  font-size: 15px;
  color: var(--color-text-tertiary);
  margin-bottom: 32px;
}
.download-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  color: var(--color-text-primary);
  border: none;
  border-radius: var(--radius-btn);
  padding: 14px 28px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
}
.btn-download:hover { background: var(--color-brand-light); }
.btn-download:active { transform: scale(0.98); }

/* ========== Footer ========== */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 48px 0;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-logo { width: 24px; height: 24px; }
.footer-name {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.footer-tagline {
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--color-text-tertiary);
  font-style: italic;
}
.footer-copy {
  font-size: 12px;
  color: var(--color-text-tertiary);
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .section { padding: 48px 0; }
  .section-title { font-size: 24px; }
  .section-subtitle { font-size: 14px; }

  .nav-links { display: none; }
  .nav-cta { padding: 8px 16px; font-size: 13px; }

  .hero-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero-title { font-size: 32px; }
  .hero-actions { flex-direction: column; }
  .hero-phone { width: 200px; }

  .pain-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .pain-punchline { font-size: 18px; }

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

  .templates-grid { grid-template-columns: 1fr; gap: 16px; }

  .workflow-steps { flex-direction: column; align-items: center; }
  .workflow-arrow { transform: rotate(90deg); padding-top: 0; padding: 8px 0; }

  .offline-inner { grid-template-columns: 1fr; gap: 32px; }
  .offline-graphic { width: 160px; height: 160px; font-size: 64px; }

  .download-card { padding: 40px 20px; }
  .download-title { font-size: 26px; }
  .download-actions { flex-direction: column; align-items: center; }
}