/* ============================================================
   茶叶展示网站 - 全局样式（Apple 设计语言）
   设计要点：大留白 / 大字号 / 黑白灰为主 / 半透明毛玻璃导航
   ============================================================ */

/* ---------- 全局变量 ---------- */
:root {
  --color-bg: #fbfbfd;
  --color-text: #1d1d1f;
  --color-text-secondary: #6e6e73;
  --color-text-tertiary: #86868b;
  --color-border: #d2d2d7;
  --color-accent: #0071e3;
  --color-accent-dark: #0077ed;
  --color-card-bg: #ffffff;
  --color-nav-bg: rgba(251, 251, 253, 0.8);
  --color-overlay: rgba(0, 0, 0, 0.4);
  --color-tea: #2d5e3e;          /* 茶叶绿主色 */
  --color-tea-light: #4a8c63;
  --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.12);
  --radius: 18px;
  --radius-sm: 10px;
  --max-width: 1200px;
  --nav-height: 56px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro SC", "PingFang SC",
               "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent); }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }

/* ---------- 主内容区（避开固定导航） ---------- */
.main-content { padding-top: var(--nav-height); min-height: calc(100vh - var(--nav-height)); }

/* ============================================================
   顶部导航栏（Apple 风格：固定 + 半透明毛玻璃）
   ============================================================ */
.nav-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: var(--color-nav-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  z-index: 1000;
}
.nav-container {
  max-width: var(--max-width);
  height: 100%;
  margin: 0 auto;
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav-logo {
  display: flex; align-items: center; gap: 6px;
  font-size: 18px; font-weight: 600;
  color: var(--color-text);
}
.logo-icon { font-size: 22px; }

.nav-menu { display: flex; align-items: center; gap: 28px; flex: 1; justify-content: center; }
.nav-menu > li { position: relative; }
.nav-menu a {
  font-size: 13px;
  color: var(--color-text);
  opacity: 0.85;
  font-weight: 400;
}
.nav-menu a:hover { opacity: 1; color: var(--color-text); }

/* ============ 分类下拉菜单 ============ */
.nav-dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.dropdown-arrow {
  transition: transform var(--transition);
}
.nav-dropdown:hover .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 180px;
  padding: 8px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.10);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 1001;
}
.nav-dropdown:hover .dropdown-menu,
.nav-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.dropdown-menu li a {
  display: block;
  padding: 8px 14px;
  font-size: 13px;
  color: var(--color-text);
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0.85;
}
.dropdown-menu li a:hover {
  background: rgba(0, 0, 0, 0.05);
  opacity: 1;
  color: var(--color-text);
}
.dropdown-empty {
  padding: 10px 14px;
  font-size: 12px;
  color: var(--color-text-tertiary);
  text-align: center;
}

.nav-actions { display: flex; align-items: center; gap: 8px; }
.nav-icon-btn {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 8px 10px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  font-size: 13px;
  transition: background var(--transition);
}
.nav-icon-btn:hover { background: rgba(0, 0, 0, 0.05); }

/* 语言切换按钮（右上角） */
.nav-lang-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 32px;
  padding: 6px 10px;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
  transition: all var(--transition);
}
.nav-lang-btn:hover {
  background: var(--color-text);
  color: #fff;
  border-color: var(--color-text);
}
.contact-label { font-weight: 500; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  background: #f5f5f7;
  border-top: 1px solid var(--color-border);
  padding: 40px 22px 24px;
  margin-top: 80px;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
}
.footer-col h4 {
  font-size: 13px; font-weight: 600;
  color: var(--color-text); margin: 0 0 12px;
}
.footer-col p { font-size: 12px; color: var(--color-text-secondary); margin: 0; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 12px; color: var(--color-text-secondary); }
.footer-col ul li a:hover { color: var(--color-text); }
.footer-bottom {
  max-width: var(--max-width);
  margin: 24px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 12px;
  color: var(--color-text-tertiary);
}

/* ============================================================
   联系我们 弹窗（精致美观版）
   ============================================================ */
.contact-modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--color-overlay);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
  z-index: 2000;
  padding: 20px;
}
.contact-modal-overlay.active { opacity: 1; visibility: visible; }

.contact-modal {
  position: relative;
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  overflow: hidden;
  background: var(--color-card-bg);
  border-radius: 22px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.24);
  transform: scale(0.92) translateY(20px);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  display: flex;
  flex-direction: column;
}
.contact-modal-overlay.active .contact-modal { transform: scale(1) translateY(0); }

/* 弹窗头部 */
.contact-modal-header {
  padding: 32px 32px 20px;
  text-align: center;
  background: linear-gradient(135deg, #2d5e3e 0%, #4a8c63 100%);
  color: #fff;
  position: relative;
}
.contact-icon-wrap {
  width: 64px; height: 64px;
  margin: 0 auto 12px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  color: #fff;
}
.contact-modal-header h2 {
  margin: 0 0 6px;
  font-size: 22px; font-weight: 600;
}
.contact-subtitle {
  margin: 0;
  font-size: 13px;
  opacity: 0.85;
}

/* 关闭按钮 */
.modal-close-btn {
  position: absolute;
  top: 14px; right: 14px;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 22px;
  line-height: 1;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition);
}
.modal-close-btn:hover { background: rgba(255, 255, 255, 0.32); }

/* 弹窗主体（可滚动） */
.contact-modal-body {
  padding: 24px 32px 28px;
  overflow-y: auto;
  flex: 1;
}

/* 联系列表 */
.contact-list { display: flex; flex-direction: column; gap: 14px; }
.contact-row {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 14px 16px;
  background: #f5f5f7;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.contact-row:hover { background: #ededf0; }
.contact-row .row-icon {
  width: 36px; height: 36px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-tea);
  color: #fff;
  border-radius: 50%;
  font-size: 16px;
}
.contact-row .row-content { flex: 1; min-width: 0; }
.contact-row .row-label {
  font-size: 12px;
  color: var(--color-text-tertiary);
  margin-bottom: 2px;
}
.contact-row .row-value {
  font-size: 15px;
  color: var(--color-text);
  font-weight: 500;
  word-break: break-all;
}
.contact-row .row-value a { color: var(--color-accent); }

/* 二维码区 */
.contact-qr {
  margin-top: 18px;
  padding: 18px;
  background: #f5f5f7;
  border-radius: var(--radius-sm);
  text-align: center;
}
.contact-qr img {
  width: 140px; height: 140px;
  margin: 0 auto 10px;
  border-radius: 8px;
  background: #fff;
  padding: 6px;
}
.contact-qr p { margin: 0; font-size: 12px; color: var(--color-text-secondary); }

/* 附加说明 */
.contact-notice {
  margin-top: 16px;
  padding: 12px 16px;
  background: rgba(45, 94, 62, 0.06);
  border-left: 3px solid var(--color-tea);
  border-radius: 6px;
  font-size: 13px;
  color: var(--color-text-secondary);
  white-space: pre-wrap;
}

/* Loading */
.contact-loading { text-align: center; padding: 30px 0; color: var(--color-text-tertiary); }
.spinner {
  width: 32px; height: 32px;
  margin: 0 auto 12px;
  border: 3px solid #e5e5ea;
  border-top-color: var(--color-tea);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   通用按钮
   ============================================================ */
.cta-btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 980px;
  transition: all var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
}
.cta-primary {
  background: var(--color-tea);
  color: #fff;
}
.cta-primary:hover {
  background: var(--color-tea-light);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(45, 94, 62, 0.3);
}
.cta-secondary {
  background: transparent;
  color: var(--color-tea);
  border-color: var(--color-tea);
}
.cta-secondary:hover {
  background: var(--color-tea);
  color: #fff;
}

/* ---------- 通用段落标题 ---------- */
.section-header {
  text-align: center;
  padding: 80px 22px 40px;
}
.section-title {
  font-size: 42px;
  font-weight: 600;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}
.section-subtitle {
  font-size: 19px;
  color: var(--color-text-secondary);
  margin: 0;
}

/* ---------- 空提示 ---------- */
.empty-tip {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 22px;
  color: var(--color-text-tertiary);
}
.empty-tip a { color: var(--color-accent); }

/* ============================================================
   移动端汉堡菜单 + 右侧侧边栏
   ============================================================ */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0 9px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-hamburger:hover { background: rgba(0, 0, 0, 0.05); }
.nav-hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.active span:nth-child(2) { opacity: 0; }
.nav-hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 侧边栏遮罩 */
.mobile-sidebar-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--color-overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 1500;
}
.mobile-sidebar-overlay.active { opacity: 1; visibility: visible; }

/* 侧边栏面板 */
.mobile-sidebar {
  position: fixed;
  top: 0; right: 0; bottom: 0;
  width: 300px;
  max-width: 85vw;
  background: var(--color-card-bg);
  z-index: 1600;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  box-shadow: -8px 0 32px rgba(0, 0, 0, 0.12);
}
.mobile-sidebar.active { transform: translateX(0); }

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}
.sidebar-title { font-size: 18px; font-weight: 600; color: var(--color-text); }
.sidebar-close {
  width: 32px; height: 32px;
  font-size: 24px; line-height: 1;
  border-radius: 50%;
  color: var(--color-text-secondary);
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), color var(--transition);
}
.sidebar-close:hover { background: rgba(0, 0, 0, 0.05); color: var(--color-text); }

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}
.sidebar-link-primary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 1px solid #f0f0f2;
  transition: background var(--transition), color var(--transition);
}
.sidebar-link-primary:hover { background: #f5f5f7; color: var(--color-text); }
.sidebar-icon { font-size: 20px; }

.sidebar-group { margin-top: 4px; }
.sidebar-group-title {
  padding: 18px 20px 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.sidebar-link-sub {
  display: block;
  padding: 12px 20px 12px 54px;
  font-size: 15px;
  color: var(--color-text-secondary);
  transition: background var(--transition), color var(--transition);
}
.sidebar-link-sub:hover { background: #f5f5f7; color: var(--color-text); }
.sidebar-empty { padding: 8px 20px 8px 54px; font-size: 14px; color: var(--color-text-tertiary); }

/* ---------- 响应式 ---------- */
@media (max-width: 832px) {
  .nav-menu { display: none; }
  .nav-hamburger { display: flex; }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
  .section-title { font-size: 32px; }
  .section-subtitle { font-size: 17px; }
  .contact-label { display: none; }
}