/* =====================================================
   到可到对货 官网 - 产品功能页样式
   ===================================================== */

/* ─── 功能导航 ─── */
.features-nav {
  position: sticky;
  top: var(--nav-height);
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.features-nav-inner {
  display: flex;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.features-nav-inner::-webkit-scrollbar { display: none; }

.features-nav-item {
  min-height: var(--touch-target-min);
  padding: 10px 20px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
}

.features-nav-item:hover,
.features-nav-item.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* ─── 功能区块 ─── */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.feature-block-reverse {
  direction: rtl;
}

.feature-block-reverse > * {
  direction: ltr;
}

.feature-block-tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.feature-block-tag.blue { background: var(--color-primary-bg); color: var(--color-primary); }
.feature-block-tag.green { background: var(--color-success-bg); color: var(--color-success); }
.feature-block-tag.orange { background: var(--color-warning-bg); color: var(--color-warning); }
.feature-block-tag.sky { background: var(--color-security-bg); color: var(--color-security); }
.feature-block-tag.purple { background: var(--color-data-bg); color: var(--color-data); }

.feature-block-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

.feature-block-desc {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: var(--spacing-xl);
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.feature-list li i {
  color: var(--color-success);
  font-size: 14px;
  margin-top: 3px;
  flex-shrink: 0;
}

.feature-block-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ─── 功能截图展示 ─── */
.feature-screenshots {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 16px;
}

.feature-phone-main {
  width: 220px;
  z-index: 2;
}

.feature-phone-sub {
  width: 170px;
  z-index: 1;
  transform: translateY(20px);
}

.feature-desktop-main {
  width: min(100%, 520px);
}

.feature-desktop-sub {
  width: min(100%, 360px);
  transform: translateY(16px);
}

/* ─── 对账付款流程 ─── */
.reconcile-flow {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 420px;
  margin: 0 auto;
}

.reconcile-step {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
}

.reconcile-step-done {
  border-color: var(--color-success);
  background: var(--color-success-bg);
}

.reconcile-connector {
  width: 2px;
  height: 24px;
  background: var(--color-border);
  margin-left: 24px;
}

.reconcile-step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  flex-shrink: 0;
}

.reconcile-step-num.done {
  background: var(--color-success);
}

.reconcile-step-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.reconcile-step-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ─── 数据中心模块 ─── */
.section-data {
  background: linear-gradient(135deg, #FAF5FF 0%, #EFF6FF 100%);
}

.data-modules-label {
  margin-bottom: 16px;
}

.data-modules-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.data-module-card {
  background: #fff;
  border-radius: var(--radius-xl);
  border: 1px solid #DDD6FE;
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
}

.data-module-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.data-module-coming {
  background: #FAFAFA;
  border-color: var(--color-border);
  opacity: 0.85;
}

.data-module-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-data-bg);
  color: var(--color-data);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: var(--spacing-md);
}

.data-module-coming .data-module-icon {
  background: #F3F4F6;
  color: var(--color-text-muted);
}

.data-module-card h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.data-module-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}

.data-module-value-tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--color-data-bg);
  color: var(--color-data);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  margin-bottom: var(--spacing-md);
}

.data-module-value-tag.coming {
  background: #FEF3C7;
  color: #D97706;
}

.data-module-screenshot {
  margin-top: var(--spacing-md);
}

.data-stat-note {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--color-primary-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md) var(--spacing-lg);
  margin-top: var(--spacing-2xl);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.data-stat-note i {
  color: var(--color-primary);
  margin-top: 2px;
  flex-shrink: 0;
}

/* ─── 动画 ─── */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: none;
}

/* ─── 响应式 ─── */
@media (max-width: 1024px) {
  .feature-block { grid-template-columns: 1fr; gap: 32px; }
  .feature-block-reverse { direction: ltr; }
  .data-modules-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .feature-block-title { font-size: var(--font-size-2xl); }
  .feature-phone-main { width: 160px; }
  .feature-phone-sub { width: 130px; }
  .feature-desktop-main,
  .feature-desktop-sub { width: 100%; transform: none; }
  .data-modules-grid { grid-template-columns: 1fr; }
}