/**
 * tranSnovo 健耕医药 - 通用样式库
 * 统一全站的视觉风格和组件
 */

/* ============================================
   CSS 变量定义 - 全局设计系统
   ============================================ */
:root {
  /* 主色调 - 医疗科技蓝 */
  --primary-50: #eef4ff;
  --primary-100: #d9e6ff;
  --primary-200: #b3ccff;
  --primary-300: #80aaff;
  --primary-400: #4d85ff;
  --primary-500: #1a59e0;
  --primary-600: #0f3fb5;
  --primary-700: #0a2c85;

  /* 强调色 - 生命粉 */
  --accent-400: #ff4d8d;
  --accent-500: #e61e6c;
  --accent-600: #b81255;

  /* 中性色 - 优雅灰 */
  --slate-50: #f9fafc;
  --slate-100: #f0f2f6;
  --slate-200: #e2e6ed;
  --slate-300: #c8ced9;
  --slate-400: #9aa3b3;
  --slate-500: #6b778c;
  --slate-600: #4a5568;
  --slate-700: #2d3748;
  --slate-800: #1a2433;
  --slate-900: #0d1033;

  /* 语义色 */
  --bg-primary: #ffffff;
  --bg-secondary: var(--slate-50);
  --bg-tertiary: var(--slate-100);
  --bg-light: #f5f7fa;
  --bg-dark: #0d1033;
  --border: var(--slate-200);
  --border-light: rgba(15, 63, 181, 0.06);
  --text-primary: var(--slate-800);
  --text-secondary: var(--slate-600);
  --text-tertiary: var(--slate-400);
  --text-light: #ffffff;

  /* 品牌色 */
  --tech-blue: #5B8FF9;
  --pink: #E61E6C;

  /* 效果色 */
  --shadow-sm: 0 1px 3px rgba(15, 63, 181, 0.06);
  --shadow-md: 0 4px 12px rgba(15, 63, 181, 0.08);
  --shadow-lg: 0 8px 30px rgba(15, 63, 181, 0.12);
  --shadow-xl: 0 20px 60px rgba(15, 63, 181, 0.16);
  --glow-primary: 0 0 40px rgba(26, 89, 224, 0.25);
  --glow-accent: 0 0 40px rgba(230, 30, 108, 0.3);
}

/* ============================================
   基础重置和全局样式
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 精致滚动条 */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--slate-100);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary-400), var(--primary-600));
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--primary-500), var(--primary-700));
}

/* ============================================
   导航栏样式
   ============================================ */
#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 99999;
  background: transparent;
  transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

#nav::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(24px) saturate(180%);
  transition: all 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  z-index: -1;
}

#nav.scrolled::before {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02), 0 8px 30px rgba(15, 63, 181, 0.08);
}

.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 56px;
  height: 84px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
}

.nav-logo img {
  height: 44px;
  filter: drop-shadow(0 2px 8px rgba(26, 89, 224, 0.15));
  transition: filter 0.3s ease, transform 0.3s ease;
}

.nav-logo:hover img {
  filter: drop-shadow(0 4px 15px rgba(26, 89, 224, 0.3));
  transform: scale(1.02);
}

#nav.scrolled .nav-logo img {
  filter: drop-shadow(0 2px 8px rgba(15, 63, 181, 0.12));
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 6px;
  align-items: center;
}

.nav-links > li {
  position: relative;
}

.nav-links > li > a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 10px;
  transition: all 0.25s cubic-bezier(0.22, 1, 0.36, 1);
  position: relative;
}

/* 下划线指示器 */
.nav-links > li > a::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-500));
  transform: translateX(-50%);
  transition: width 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  border-radius: 2px;
}

.nav-links > li > a:hover {
  color: var(--primary-600);
  background: var(--primary-50);
}

.nav-links > li > a:hover::after,
.nav-links > li > a.active::after {
  width: 20px;
}

.nav-links > li > a.has-submenu::after {
  content: '';
  display: inline-block;
  width: 0;
  height: 0;
  margin-left: 4px;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.nav-links > li > a.has-submenu:hover::after {
  transform: rotate(180deg);
}

/* ===== 下拉菜单 ===== */
.nav-links .sub-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 240px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 10px;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  box-shadow: 0 20px 60px rgba(15, 63, 181, 0.12), 0 0 0 1px rgba(15, 63, 181, 0.04);
  z-index: 1001;
}

.nav-links > li:hover > .sub-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-links .sub-menu > li {
  list-style: none;
  position: relative;
}

.nav-links .sub-menu > li > a {
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 10px;
  transition: all 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}

.nav-links .sub-menu > li > a:hover {
  color: var(--primary-600);
  background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
  transform: translateX(4px);
}

/* 二级下拉菜单 */
.nav-links .sub-menu li .sub-menu-2 {
  position: absolute;
  left: 100%;
  top: -10px;
  margin-left: 8px;
  min-width: 220px;
  opacity: 0;
  visibility: hidden;
  transform: translateX(8px);
  transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.nav-links .sub-menu li:hover > .sub-menu-2 {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

.nav-links .sub-menu li > a.has-submenu::after {
  content: '›';
  font-size: 18px;
  line-height: 1;
  margin-left: 8px;
  color: var(--slate-400);
  transition: all 0.25s ease;
}

.nav-links .sub-menu li > a.has-submenu:hover::after {
  color: var(--primary-500);
  transform: translateX(4px);
}

/* 三级下拉菜单 */
.nav-links .sub-menu-2 {
  padding: 10px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(15, 63, 181, 0.12), 0 0 0 1px rgba(15, 63, 181, 0.04);
  white-space: nowrap;
}

.nav-links .sub-menu-2 li {
  list-style: none;
  position: relative;
}

.nav-links .sub-menu-2 li > a {
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 10px;
  transition: all 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}

.nav-links .sub-menu-2 li > a:hover {
  color: var(--primary-600);
  background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
  transform: translateX(4px);
}

.nav-links .sub-menu-2 li .sub-menu-3 {
  position: absolute;
  left: 100%;
  top: -10px;
  margin-left: 8px;
  min-width: 300px;
  max-width: 360px;
  opacity: 0;
  visibility: hidden;
  transform: translateX(8px);
  transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  white-space: nowrap;
  max-height: min(500px, 85vh);
  overflow-y: auto;
  overflow-x: hidden;
}

.nav-links .sub-menu-2 li:hover > .sub-menu-3 {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

.sub-menu-3 {
  padding: 10px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(15, 63, 181, 0.12), 0 0 0 1px rgba(15, 63, 181, 0.04);
  max-height: min(500px, 85vh);
  overflow-y: auto;
  overflow-x: hidden;
}

/* 三级菜单滚动条样式 */
.sub-menu-3::-webkit-scrollbar {
  width: 6px;
}

.sub-menu-3::-webkit-scrollbar-track {
  background: var(--slate-100);
  border-radius: 3px;
}

.sub-menu-3::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--primary-300), var(--primary-500));
  border-radius: 3px;
}

.sub-menu-3::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--primary-400), var(--primary-600));
}

.sub-menu-3 .product-group-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--slate-400);
  padding: 10px 14px 6px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  position: relative;
}

.sub-menu-3 .product-group-title::before {
  content: '';
  position: absolute;
  left: 14px;
  bottom: 0;
  width: 12px;
  height: 1px;
  background: linear-gradient(90deg, var(--primary-400), transparent);
}

.sub-menu-3 .product-group {
  margin-bottom: 4px;
  list-style: none;
}

.sub-menu-3 .product-item {
  padding: 10px 14px 10px 26px;
  font-size: 13px;
  color: var(--text-secondary);
  transition: all 0.25s cubic-bezier(0.22, 1, 0.36, 1);
  display: block;
  list-style: none;
  white-space: nowrap;
  border-radius: 8px;
  text-decoration: none;
  position: relative;
}

.sub-menu-3 .product-item::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 4px;
  background: var(--slate-300);
  border-radius: 50%;
  transition: all 0.2s ease;
}

.sub-menu-3 .product-item:hover {
  color: var(--primary-600);
  background: var(--primary-50);
  transform: translateX(6px);
}

.sub-menu-3 .product-item:hover::before {
  background: var(--primary-500);
  width: 6px;
  height: 6px;
}

/* ===== 导航按钮 ===== */
.nav-btn {
  padding: 12px 26px;
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border-radius: 100px;
  text-decoration: none;
  transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  box-shadow: 0 4px 15px rgba(26, 89, 224, 0.3), 0 1px 3px rgba(26, 89, 224, 0.2);
  position: relative;
  overflow: hidden;
}

.nav-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-500), var(--accent-400));
  opacity: 0;
  transition: opacity 0.35s ease;
  border-radius: 100px;
}

.nav-btn span {
  position: relative;
  z-index: 1;
}

.nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(26, 89, 224, 0.4), 0 2px 6px rgba(26, 89, 224, 0.25);
}

.nav-btn:hover::before {
  opacity: 1;
}

/* ===== 移动端导航 ===== */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s;
}

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

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

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

.mobile-nav-panel {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
  padding-top: 80px;
  display: none;
}

.mobile-nav-panel.active {
  display: block;
  transform: translateX(0);
}

.mobile-nav-links {
  list-style: none;
  padding: 0;
}

.mobile-nav-links > li {
  border-bottom: 1px solid var(--border);
}

.mobile-nav-links > li > a {
  display: block;
  padding: 18px 24px;
  color: var(--text-primary);
  font-size: 18px;
  font-weight: 500;
  text-decoration: none;
}

.mobile-nav-links > li > a:hover {
  background: rgba(91, 143, 249, 0.05);
  color: var(--tech-blue);
}

.mobile-sub-menu {
  list-style: none;
  padding: 0;
  display: none;
  background: rgba(91, 143, 249, 0.03);
}

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

.mobile-sub-menu li a {
  display: block;
  padding: 14px 24px 14px 36px;
  color: var(--text-secondary);
  font-size: 16px;
  text-decoration: none;
}

.mobile-sub-menu li a:hover {
  color: var(--tech-blue);
}

.mobile-menu-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.mobile-menu-toggle::after {
  content: '›';
  font-size: 18px;
  transition: transform 0.3s;
}

.mobile-menu-toggle.open::after {
  transform: rotate(90deg);
}

.mobile-nav-btn {
  display: block;
  margin: 24px;
  padding: 16px 32px;
  background: linear-gradient(135deg, var(--tech-blue), #3A7BD5);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  border-radius: 100px;
  text-align: center;
  text-decoration: none;
  box-shadow: 0 4px 15px rgba(91, 143, 249, 0.35);
}

/* ===== 响应式导航 ===== */
@media (max-width: 1200px) {
  .nav-inner {
    padding: 0 32px;
  }
}

@media (max-width: 992px) {
  .nav-links, .nav-btn {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-inner {
    padding: 0 20px;
  }
}

/* ============================================
   语言切换按钮
   ============================================ */
.lang-switch-btn {
  padding: 10px 20px;
  background: transparent;
  border: 1px solid var(--primary-400);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  margin-right: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.lang-switch-btn:hover {
  border-color: var(--primary-600);
  color: var(--primary-600);
  background: var(--primary-50);
  transform: translateY(-1px);
}

.lang-switch-btn svg {
  width: 16px;
  height: 16px;
}

/* 移动端语言切换 */
.mobile-lang-switch {
  display: none;
  margin: 24px;
  padding: 14px 28px;
  background: var(--primary-50);
  border: 1px solid var(--primary-300);
  border-radius: 100px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s;
}

.mobile-lang-switch:hover {
  background: var(--primary-100);
  border-color: var(--primary-500);
  color: var(--primary-700);
}

@media (max-width: 992px) {
  .lang-switch-btn {
    display: none;
  }

  .mobile-lang-switch {
    display: block;
  }
}