/* CloudPapyrus 云笺 — Scholarly Design System */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

html {
  scroll-behavior: smooth;
}

/* Navigation */
.nav-glass {
  background: rgba(245, 242, 233, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(196, 169, 98, 0.25);
  box-shadow: 0 4px 24px rgba(26, 26, 27, 0.06);
}

.nav-link {
  font-size: 0.875rem;
  color: #4A4540;
  transition: color 200ms ease-out;
  cursor: pointer;
}

.nav-link:hover {
  color: #1E3A5F;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  border-radius: 9999px;
  background-color: #1E3A5F;
  color: #F5F2E9;
  font-weight: 500;
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
  transition: background-color 200ms ease-out, box-shadow 200ms ease-out;
  box-shadow: 0 2px 8px rgba(30, 58, 95, 0.2);
}

.btn-primary:hover {
  background-color: #2C5282;
  box-shadow: 0 4px 16px rgba(30, 58, 95, 0.25);
}

.btn-primary:focus-visible {
  outline: 2px solid #C4A962;
  outline-offset: 2px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  border-radius: 9999px;
  background-color: rgba(255, 255, 255, 0.7);
  color: #1E3A5F;
  font-weight: 500;
  font-size: 0.9375rem;
  border: 1px solid rgba(30, 58, 95, 0.2);
  transition: background-color 200ms ease-out, border-color 200ms ease-out;
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.95);
  border-color: rgba(30, 58, 95, 0.35);
}

.btn-secondary:focus-visible {
  outline: 2px solid #C4A962;
  outline-offset: 2px;
}

/* Hero — height tracks background.png aspect ratio (1584×672) to avoid blank space below */
.hero-section {
  background-color: #F5F2E9;
  width: 100%;
  height: clamp(480px, calc(100vw * 672 / 1584), 900px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-content {
  margin-top: 3rem;
  padding-bottom: 0.5rem;
}

@media (min-width: 768px) {
  .hero-content {
    margin-top: 3.5rem;
  }
}

.hero-bg {
  background-image: url('../../assets/images/backgrounds/background.png');
  background-repeat: no-repeat;
  background-position: top center;
  background-size: 100% 100%;
}

.hero-overlay {
  background:
    linear-gradient(
      to right,
      rgba(245, 242, 233, 0.35) 0%,
      rgba(245, 242, 233, 0.5) 35%,
      rgba(245, 242, 233, 0.55) 65%,
      rgba(245, 242, 233, 0.42) 100%
    ),
    linear-gradient(
      to bottom,
      rgba(245, 242, 233, 0.45) 0%,
      rgba(245, 242, 233, 0.58) 55%,
      rgba(245, 242, 233, 0.92) 100%
    );
}

@media (max-width: 768px) {
  .hero-section {
    height: clamp(560px, 88vh, 720px);
  }

  .hero-content {
    margin-top: 2.5rem;
  }

  .hero-bg {
    background-size: cover;
    background-position: 72% center;
  }
}

/* Section labels */
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: #C4A962;
}

/* Paper card */
.paper-card {
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid rgba(196, 169, 98, 0.3);
  box-shadow: 0 8px 32px rgba(26, 26, 27, 0.06);
}

.writing-mode-vertical {
  writing-mode: vertical-rl;
  text-orientation: upright;
}

/* Feature cards */
.feature-card {
  padding: 1.75rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(196, 169, 98, 0.2);
  transition: border-color 200ms ease-out, box-shadow 200ms ease-out;
}

.feature-card:hover {
  border-color: rgba(196, 169, 98, 0.45);
  box-shadow: 0 8px 24px rgba(26, 26, 27, 0.06);
}

.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.75rem;
  background: rgba(30, 58, 95, 0.08);
  color: #1E3A5F;
  margin-bottom: 1rem;
}

.feature-icon svg {
  width: 1.375rem;
  height: 1.375rem;
}

/* Steps */
.step-item {
  text-align: center;
  padding: 1.5rem;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 9999px;
  border: 1px solid rgba(196, 169, 98, 0.5);
  font-family: "Noto Serif SC", serif;
  font-size: 1.125rem;
  color: #1E3A5F;
  margin-bottom: 1rem;
}

/* Use case cards */
.use-case-card {
  padding: 1.5rem;
  border-radius: 0.75rem;
  background: rgba(255, 255, 255, 0.6);
  border-left: 3px solid #C4A962;
  transition: background-color 200ms ease-out;
}

.use-case-card:hover {
  background: rgba(255, 255, 255, 0.85);
}

/* Pricing */
.pricing-card {
  position: relative;
  padding: 2rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(196, 169, 98, 0.25);
  transition: border-color 200ms ease-out, box-shadow 200ms ease-out;
}

.pricing-card:hover {
  border-color: rgba(196, 169, 98, 0.4);
}

.pricing-card-featured {
  border-color: #1E3A5F;
  border-width: 2px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 12px 40px rgba(30, 58, 95, 0.1);
}

.pricing-badge {
  position: absolute;
  top: -0.75rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.25rem 1rem;
  border-radius: 9999px;
  background: #1E3A5F;
  color: #F5F2E9;
  font-size: 0.75rem;
  font-weight: 500;
  white-space: nowrap;
}

.pricing-feature {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.pricing-feature::before {
  content: "";
  flex-shrink: 0;
  width: 0.375rem;
  height: 0.375rem;
  margin-top: 0.45rem;
  border-radius: 9999px;
  background: #C4A962;
}

/* FAQ */
.faq-item {
  padding: 1.5rem;
  border-radius: 0.75rem;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(196, 169, 98, 0.15);
}