/* ============================================
   Components
   - 按钮 / 卡片 / 面包屑 / 内页头部 / 动效
   ============================================ */

/* ========== Buttons ========== */
.btn,
.btn-cta,
.btn-lang {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base), transform var(--transition-fast);
  text-decoration: none;
  user-select: none;
}

.btn {
  position: relative;
  overflow: hidden;
  border: 1px solid transparent;
}

/* 按钮涟漪效果（克制） */
.btn::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background-color: rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.btn:active::before {
  width: 320px;
  height: 320px;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-cream);
}

.btn-primary:hover {
  background-color: var(--color-accent-light);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary);
}

.btn-small {
  padding: 10px 22px;
  font-size: 14px;
}

.btn-cta {
  font-size: 14px;
  padding: 10px 24px;
  color: var(--color-cream);
  background-color: var(--color-primary);
  border-radius: var(--radius-md);
}

.btn-cta:hover {
  background-color: var(--color-accent);
}

.btn-lang {
  padding: 10px 16px;
  font-size: 12px;
  letter-spacing: 0.18em;
  border-radius: var(--radius-md);
  background-color: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-secondary);
}

.btn-lang:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ========== Links ========== */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-primary);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.link-arrow:hover {
  gap: var(--space-md);
  color: var(--color-accent);
}

.link-text {
  font-size: 13px;
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.link-text:hover {
  border-color: var(--color-accent);
}

/* ========== Cards ========== */
.card {
  background-color: var(--color-cream);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: none;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

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

.card-image {
  overflow: hidden;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.card:hover .card-image img {
  transform: scale(1.03);
}

.card-content {
  padding: var(--space-lg);
}

/* ========== Breadcrumb ========== */
.breadcrumb {
  background-color: var(--color-warm-ivory);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.breadcrumb .container-wide {
  padding-top: var(--space-sm);
  padding-bottom: var(--space-sm);
  font-size: 13px;
  color: var(--color-stone);
}

.breadcrumb a {
  color: var(--color-secondary);
  transition: color var(--transition-fast);
}

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

/* ========== Inner Page Hero ========== */
.page-hero {
  background-color: var(--color-cream);
  border-bottom: 1px solid var(--color-divider);
}

.page-hero .container-wide {
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--space-2xl);
  align-items: center;
}

.page-hero-title {
  font-size: clamp(34px, 4vw, 52px);
  font-weight: 400;
  margin: 0 0 var(--space-sm);
}

.page-hero-desc {
  margin: 0;
  color: var(--color-secondary);
  line-height: var(--leading-relaxed);
}

.page-hero-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-divider);
  background-color: var(--color-warm-ivory);
  aspect-ratio: 4 / 3;
}

.page-hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (max-width: 1024px) {
  .page-hero .container-wide {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .page-hero-media {
    aspect-ratio: 16 / 9;
  }
}

/* ========== Forms ========== */
.form {
  display: grid;
  gap: var(--space-md);
}

.form-row {
  display: grid;
  gap: var(--space-sm);
}

.form-row label {
  font-size: 13px;
  color: var(--color-secondary);
}

.form-row input,
.form-row textarea,
.form-row select {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background-color: var(--color-cream);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-row input:focus,
.form-row textarea:focus,
.form-row select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(28, 28, 28, 0.08);
}

.form-row textarea {
  min-height: 140px;
  resize: vertical;
}

.form-hint {
  font-size: 12px;
  color: var(--color-stone);
}

/* ========== Scroll Animations ========== */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.stagger-item:nth-child(1) { transition-delay: 0s; }
.stagger-item:nth-child(2) { transition-delay: 0.1s; }
.stagger-item:nth-child(3) { transition-delay: 0.2s; }
.stagger-item:nth-child(4) { transition-delay: 0.3s; }

/* ========== Prose（内页长文排版） ========== */
.prose {
  color: var(--color-secondary);
}

.prose > * + * {
  margin-top: var(--space-md);
}

.prose h2 {
  font-size: 28px;
  font-weight: 400;
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-sm);
}

.prose h3 {
  font-size: 20px;
  font-weight: 500;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.prose p {
  color: var(--color-secondary);
}

.prose ul {
  list-style: none;
  padding: 0;
  margin: var(--space-md) 0 0;
  display: grid;
  gap: 10px;
}

.prose ul li {
  display: grid;
  grid-template-columns: 14px 1fr;
  gap: 10px;
  align-items: start;
  line-height: var(--leading-normal);
}

.prose ul li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
  margin-top: 9px;
}

.center-cta {
  margin-top: var(--space-xl);
  text-align: center;
}