/* ============================================
   藏甄膳官网 - 全局布局
   Layout: Header, Footer, Container, Grid
   ============================================ */

/* ===== 容器 ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--container-padding-x);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.container--wide {
  max-width: 1400px;
}

/* ===== 页面主体布局 ===== */
.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.page-main {
  flex: 1;
}

/* ==============================
   HEADER 导航栏
   ============================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  height: var(--header-height);
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-normal), background var(--transition-normal);
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: var(--space-4);
}

/* Logo 区域 */
.header-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.header-logo img {
  height: 44px;
  width: auto;
}

.header-logo-text {
  font-family: var(--font-family-heading);
  font-size: var(--text-xl);
  font-weight: var(--font-extrabold);
  color: var(--color-primary);
  white-space: nowrap;
}

.header-logo-slogan {
  font-size: var(--text-xs);
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* 主导航 */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  white-space: nowrap;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.nav-link--active {
  color: var(--color-primary);
  font-weight: var(--font-semibold);
}

.nav-link--active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.mobile-menu-btn:hover {
  background: var(--color-gray-100);
}

.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端导航面板 */
.mobile-nav-panel {
  display: none;
  position: fixed;
  top: var(--header-height-mobile);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-white);
  z-index: var(--z-fixed);
  padding: var(--space-4);
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
}

.mobile-nav-panel.open {
  display: block;
  animation: slideDown 0.3s ease forwards;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.mobile-nav-panel .nav-list {
  flex-direction: column;
  gap: 0;
}

.mobile-nav-panel .nav-link {
  display: flex;
  padding: var(--space-3) var(--space-2);
  font-size: var(--text-lg);
  border-bottom: 1px solid var(--color-gray-200);
  border-radius: 0;
}

.mobile-nav-panel .nav-link:last-child {
  border-bottom: none;
}

.mobile-nav-panel .nav-link:hover {
  background: var(--color-primary-bg);
}

/* ==============================
   FOOTER 页脚
   ============================== */
.site-footer {
  background: var(--color-secondary);
  color: var(--color-white);
  padding-top: var(--space-10);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: var(--space-6);
  padding-bottom: var(--space-8);
}

.footer-brand p {
  color: rgba(255,255,255,0.7);
  font-size: var(--text-sm);
  margin-top: var(--space-3);
  line-height: var(--leading-relaxed);
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.footer-brand .footer-logo img {
  height: 44px;
  width: auto;
}

.footer-brand > p {
  max-width: 260px;
}

.footer-heading {
  font-family: var(--font-family-base);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--color-white);
  margin-bottom: var(--space-4);
  position: relative;
  padding-bottom: var(--space-2);
}

.footer-heading::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--color-primary);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-links a {
  color: rgba(255,255,255,0.7);
  font-size: var(--text-sm);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.footer-links a:hover {
  color: var(--color-primary-light);
  padding-left: 4px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.7);
}

.footer-contact-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--color-primary-light);
  margin-top: 2px;
}

.footer-qrcode {
  margin-top: var(--space-3);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.footer-qrcode img {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-md);
}

.footer-qrcode p {
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.6);
  text-align: center;
  margin-top: var(--space-1);
}

/* Footer 底部版权栏 */
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: var(--space-4) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.5);
}

.footer-bottom-links {
  display: flex;
  gap: var(--space-4);
}

.footer-bottom-links a {
  color: rgba(255,255,255,0.5);
  transition: color var(--transition-fast);
}

.footer-bottom-links a:hover {
  color: var(--color-primary-light);
}

/* ==============================
   Grid 系统
   ============================== */
.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* 两栏布局 */
.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  align-items: center;
}

/* 侧边栏布局 */
.with-sidebar {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  gap: var(--space-6);
  align-items: start;
}

/* ==============================
   Section 通用样式
   ============================== */
.section {
  padding: var(--space-12) 0;
}

.section--sm { padding: var(--space-8) 0; }
.section--lg { padding: var(--space-16) 0; }

.section-header {
  text-align: center;
  max-width: 840px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
}

.section-title {
  font-size: var(--text-4xl);
  color: var(--text-primary);
  margin-bottom: var(--space-3);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: var(--color-primary);
  margin: var(--space-3) auto 0;
  border-radius: var(--radius-full);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-muted);
  line-height: var(--leading-relaxed);
  font-weight: var(--font-normal);
  font-family: var(--font-family-base);
}

/* 分隔线装饰 */
.divider-deco {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin: var(--space-6) 0;
}

.divider-deco::before,
.divider-deco::after {
  content: '';
  height: 1px;
  width: 80px;
  background: linear-gradient(to right, transparent, var(--color-primary-light));
}

.divider-deco::after {
  background: linear-gradient(to left, transparent, var(--color-primary-light));
}

.divider-icon {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
}

/* ==============================
   Breadcrumb 面包屑导航
   ============================== */
.breadcrumb {
  padding: var(--space-3) 0;
  background: var(--color-gray-50);
  border-bottom: 1px solid var(--color-gray-200);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--text-muted);
  flex-wrap: wrap;
}

.breadcrumb-list li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumb-list li:not(:last-child)::after {
  content: '/';
  color: var(--color-gray-400);
}

.breadcrumb-list a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

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

.breadcrumb-list .current {
  color: var(--text-primary);
  font-weight: var(--font-medium);
}

/* ==============================
   Page Hero 页面头部大图区域
   ============================== */
.page-hero {
  position: relative;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-12) var(--space-4);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: var(--text-inverse);
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(46,64,83,0.7) 0%,
    rgba(46,64,83,0.85) 100%
  );
}

.page-hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.page-hero h1 {
  font-size: var(--text-5xl);
  color: var(--color-white);
  margin-bottom: var(--space-3);
}

.page-hero p {
  font-size: var(--text-xl);
  color: rgba(255,255,255,0.85);
  font-family: var(--font-family-base);
  font-weight: var(--font-normal);
}