/* =====================================================
   到可到对货 官网 - 公共样式
   包含：导航栏、页脚、按钮、通用组件、工具类
   ===================================================== */

/* ─── 容器 ─── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ─── 导航栏 ─── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: box-shadow var(--transition-normal);
}

.nav.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.nav-logo img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.nav-logo-text {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  letter-spacing: -0.3px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-menu a {
  min-height: var(--touch-target-min);
  padding: 8px 14px;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* 汉堡菜单按钮（移动端） */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.nav-hamburger:hover {
  background: var(--color-border-light);
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

/* 移动端菜单展开 */
.nav-mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  padding: 12px 24px 20px;
  box-shadow: var(--shadow-md);
  z-index: 999;
}

.nav-mobile-menu.open {
  display: block;
}

.nav-mobile-menu a {
  display: block;
  min-height: var(--touch-target-min);
  padding: 12px 0;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border-light);
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
}

.nav-mobile-menu a:last-child {
  border-bottom: none;
}

.nav-mobile-menu a:hover {
  color: var(--color-primary);
}

/* ─── 按钮 ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: var(--touch-target-min);
  padding: 10px 22px;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  cursor: pointer;
  text-decoration: none;
  border: 2px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(25,118,210,0.3);
}

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

.btn-secondary:hover {
  background: var(--color-primary-bg);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.btn-success {
  background: var(--color-success);
  color: #fff;
  border-color: var(--color-success);
}

.btn-success:hover {
  background: var(--color-success-dark);
  border-color: var(--color-success-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(22,163,74,0.3);
}

.btn-lg {
  padding: 13px 28px;
  font-size: var(--font-size-md);
  border-radius: var(--radius-lg);
}

.btn-sm {
  padding: 7px 16px;
  font-size: var(--font-size-sm);
}

/* ─── 区块通用样式 ─── */
.section {
  padding: var(--spacing-5xl) 0;
}

.section-alt {
  background: var(--color-bg-section-alt);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--color-primary-bg);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  margin-bottom: 14px;
}

.section-tag.green {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.section-tag.purple {
  background: var(--color-data-bg);
  color: var(--color-data);
}

.section-tag.sky {
  background: var(--color-security-bg);
  color: var(--color-security);
}

.section-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;
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.75;
}

/* ─── 卡片 ─── */
.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-primary-light);
}

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

.card-icon.green {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.card-icon.purple {
  background: var(--color-data-bg);
  color: var(--color-data);
}

.card-icon.sky {
  background: var(--color-security-bg);
  color: var(--color-security);
}

.card-icon.orange {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

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

.card-desc {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
}

/* ─── 手机模型框架 ─── */
.phone-mockup {
  position: relative;
  display: inline-block;
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow-phone);
  border: 3px solid #E5E7EB;
  background: #fff;
}

.phone-mockup img {
  display: block;
  width: 100%;
  border-radius: 25px;
}

/* ─── PC截图容器 ─── */
.desktop-mockup {
  position: relative;
  display: inline-block;
  width: min(100%, 520px);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
  background: #fff;
}

.desktop-mockup img {
  display: block;
  width: 100%;
  height: auto;
}

.desktop-mockup-sm {
  width: min(100%, 280px);
}

/* ─── 标签 ─── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
}

.badge-primary {
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

.badge-success {
  background: var(--color-success-bg);
  color: var(--color-success);
}

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

/* ─── 分割线 ─── */
.divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--spacing-2xl) 0;
}

/* ─── 底部转化区（全站通用） ─── */
.section-cta {
  position: relative;
  background: linear-gradient(135deg, var(--color-primary) 0%, #1565C0 100%);
  padding: var(--spacing-4xl) 0;
  overflow: hidden;
}

.section-cta::before {
  content: "";
  position: absolute;
  width: 360px;
  height: 360px;
  right: -120px;
  top: -120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,0.18) 0%, rgba(255,255,255,0) 72%);
  pointer-events: none;
}

.section-cta::after {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  left: -120px;
  bottom: -140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(134,239,172,0.22) 0%, rgba(134,239,172,0) 75%);
  pointer-events: none;
}

.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 960px;
  margin: 0 auto;
}

.cta-title {
  font-size: var(--font-size-5xl);
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}

.cta-subtitle {
  font-size: var(--font-size-xl);
  color: rgba(255,255,255,0.85);
  margin-bottom: var(--spacing-2xl);
}

.cta-qr-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.cta-qr-box {
  background: linear-gradient(180deg, #FFFFFF 0%, #F8FBFF 100%);
  border-radius: var(--radius-xl);
  padding: 20px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255,255,255,0.65);
  text-align: center;
  min-width: 208px;
}

.cta-qr-box img {
  width: 160px;
  height: 160px;
  max-width: 160px;
  max-height: 160px;
  border-radius: var(--radius-md);
  display: block;
}

/* 兜底：底部转化区二维码始终固定尺寸，避免被页面样式覆盖导致过大 */
.section-cta .cta-qr-box img {
  width: 160px !important;
  height: 160px !important;
  max-width: 160px !important;
  max-height: 160px !important;
}

.cta-qr-label {
  font-size: var(--font-size-sm);
  color: #334155;
  margin-top: 10px;
  font-weight: var(--font-weight-medium);
}

.cta-qr-tips {
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: left;
  min-width: 320px;
}

.cta-tip {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: var(--touch-target-min);
  font-size: var(--font-size-base);
  color: #fff;
  font-weight: var(--font-weight-medium);
  padding: 10px 14px;
  border-radius: 12px;
  background: rgba(255,255,255,0.14);
  border: 1px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(4px);
}

.cta-tip i {
  color: #86EFAC;
  font-size: 18px;
}

/* ─── 页脚 ─── */
.footer {
  background: #1A2332;
  color: #CBD5E1;
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-3xl);
}

.footer-brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: var(--spacing-md);
}

.footer-brand-logo img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.footer-brand-name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: #fff;
}

.footer-brand-desc {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  color: #94A3B8;
  margin-bottom: var(--spacing-lg);
}

.footer-col-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: #fff;
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  font-size: var(--font-size-sm);
  color: #94A3B8;
  transition: color var(--transition-fast);
}

.footer-col ul li a:hover {
  color: #fff;
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  font-size: var(--font-size-sm);
  color: #94A3B8;
}

.footer-qr {
  margin-top: var(--spacing-md);
  display: inline-flex;
  flex-direction: column;
  align-items: center;
}

.footer-qr img {
  width: 90px;
  height: 90px;
  border-radius: var(--radius-md);
  border: 2px solid #334155;
  display: block;
}

.footer-qr-label {
  font-size: var(--font-size-xs);
  color: #64748B;
  margin-top: 6px;
  text-align: center;
}

.footer-bottom {
  border-top: 1px solid #2D3748;
  padding-top: var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom-text {
  font-size: var(--font-size-xs);
  color: #64748B;
}

.footer-bottom-links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-bottom-links a {
  font-size: var(--font-size-xs);
  color: #64748B;
  transition: color var(--transition-fast);
}

.footer-bottom-links a:hover {
  color: #94A3B8;
}

/* ─── 页面主体内边距（避免被固定导航遮挡）─── */
.page-main {
  padding-top: var(--nav-height);
}

/* ─── 内页顶部标题区 ─── */
.page-hero {
  background: linear-gradient(135deg, #EFF6FF 0%, #F0FDF4 100%);
  padding: var(--spacing-4xl) 0 var(--spacing-3xl);
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.page-hero-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--color-primary-bg);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-full);
  margin-bottom: 14px;
}

.page-hero-title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

.page-hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ─── 响应式 ─── */
@media (max-width: 1024px) {
  .section-title { font-size: var(--font-size-3xl); }
  .page-hero-title { font-size: var(--font-size-4xl); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-xl); }
}

@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .section { padding: var(--spacing-3xl) 0; }
  .section-title { font-size: var(--font-size-2xl); }
  .section-subtitle { font-size: var(--font-size-base); }
  .page-hero { padding: var(--spacing-3xl) 0 var(--spacing-2xl); }
  .page-hero-title { font-size: var(--font-size-3xl); }
  .page-hero-subtitle { font-size: var(--font-size-base); }

  .nav-menu, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }

  .footer-grid { grid-template-columns: 1fr; gap: var(--spacing-xl); }
  .footer-bottom { flex-direction: column; text-align: center; }

  .cta-title { font-size: var(--font-size-3xl); }
  .cta-qr-wrap { flex-direction: column; gap: 24px; }
  .cta-qr-box img { width: 160px; height: 160px; }
  .cta-qr-tips { min-width: 0; width: 100%; max-width: 420px; }
  .cta-tip { font-size: var(--font-size-sm); }
  .desktop-mockup,
  .desktop-mockup-sm { width: 100%; max-width: 100%; }
}