/* ============================================
   佳俊美肌 JIAJUN BEAUTY - 全局样式
   ============================================ */

/* CSS Variables */
:root {
  /* 颜色系统 */
  --color-primary-start: #D4A5A5;
  --color-primary-end: #EEC4C4;
  --color-primary-gradient: linear-gradient(135deg, #D4A5A5 0%, #EEC4C4 100%);
  
  --color-secondary: #A67B7B;
  --color-bg-champagne: #FBF3F0;
  --color-white: #FFFFFF;
  
  --color-success: #4CAF50;
  --color-error: #E96A6A;
  --color-warning: #F5A623;
  --color-link: #5B8DEF;
  
  --color-title: #2D2D2D;
  --color-body: #5C5C5C;
  --color-placeholder: #C0C0C0;
  --color-border: #EFEFEF;
  
  /* 字体系统 */
  --font-decorative: 'Playfair Display', 'Georgia', serif;
  --font-cn-title: 'Noto Serif SC', 'PingFang SC', 'Microsoft YaHei', serif;
  --font-body: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  
  /* 字号系统 */
  --font-size-hero: 56px;
  --font-size-section-title: 36px;
  --font-size-card-title: 20px;
  --font-size-body: 16px;
  --font-size-small: 14px;
  
  /* 间距系统 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  --spacing-4xl: 96px;
  
  /* 圆角 */
  --radius-btn-primary: 24px;
  --radius-tag: 4px;
  --radius-card: 12px;
  --radius-input: 8px;
  
  /* 阴影 */
  --shadow-card: 0 4px 24px rgba(212, 165, 165, 0.08);
  --shadow-card-hover: 0 16px 48px rgba(212, 165, 165, 0.18);
  --shadow-btn-hover: 0 8px 28px rgba(164, 123, 123, 0.35);
  --shadow-nav: 0 2px 20px rgba(0, 0, 0, 0.05);
  --shadow-nav-scrolled: 0 8px 32px rgba(164, 123, 123, 0.1);
  --shadow-glow: 0 0 40px rgba(212, 165, 165, 0.25);
  
  /* 装饰渐变 */
  --gradient-mesh-1: radial-gradient(at 20% 30%, rgba(212, 165, 165, 0.15) 0%, transparent 50%),
                      radial-gradient(at 80% 70%, rgba(238, 196, 196, 0.12) 0%, transparent 50%);
  --gradient-mesh-2: radial-gradient(at 70% 20%, rgba(166, 123, 123, 0.08) 0%, transparent 50%),
                      radial-gradient(at 20% 80%, rgba(212, 165, 165, 0.1) 0%, transparent 50%);
  
  /* 布局 */
  --max-width: 1200px;
  --nav-height: 80px;
}

/* ============================================
   字体引入 - 本地回退方案
   ============================================ */
@font-face {
  font-family: 'Playfair Display';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: local('Playfair Display Regular'), local('PlayfairDisplay-Regular');
}

@font-face {
  font-family: 'Playfair Display';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: local('Playfair Display Bold'), local('PlayfairDisplay-Bold');
}

@font-face {
  font-family: 'Noto Serif SC';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: local('Noto Serif SC'), local('NotoSerifSC-Regular');
}

@font-face {
  font-family: 'Noto Serif SC';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: local('Noto Serif SC Bold'), local('NotoSerifSC-Bold');
}

/* ============================================
   重置样式
   ============================================ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--color-body);
  line-height: 1.75;
  background-color: var(--color-white);
  overflow-x: hidden;
  letter-spacing: 0.01em;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s ease;
}

ul, ol {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
}

input, textarea {
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

/* ============================================
   通用工具类
   ============================================ */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

.section {
  padding: var(--spacing-4xl) 0;
  position: relative;
  overflow: hidden;
}

.section-title {
  font-family: var(--font-cn-title);
  font-size: var(--font-size-section-title);
  color: var(--color-title);
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  font-weight: 700;
  letter-spacing: 0.04em;
  position: relative;
  z-index: 2;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  margin: var(--spacing-md) auto 0;
  background: var(--color-primary-gradient);
  border-radius: 2px;
}

.section-subtitle {
  text-align: center;
  color: var(--color-body);
  font-size: var(--font-size-body);
  margin-bottom: var(--spacing-3xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   按钮组件
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  border-radius: var(--radius-btn-primary);
  font-size: var(--font-size-body);
  font-weight: 500;
  transition: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
  cursor: pointer;
  border: none;
  text-align: center;
  letter-spacing: 0.05em;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.6s ease;
}

.btn:hover::before { left: 100%; }

.btn-primary {
  background: var(--color-primary-gradient);
  background-size: 150% 150%;
  color: var(--color-white);
  box-shadow: 0 4px 16px rgba(212, 165, 165, 0.35), 0 1px 3px rgba(164, 123, 123, 0.2);
  animation: gradientShift 6s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.btn-primary:hover {
  box-shadow: var(--shadow-btn-hover), var(--shadow-glow);
  transform: translateY(-3px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--color-white);
  border: 2px solid rgba(255, 255, 255, 0.6);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.95);
  color: var(--color-secondary);
  border-color: var(--color-white);
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(255, 255, 255, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-secondary);
  border: 2px solid var(--color-secondary);
}

.btn-outline:hover {
  background: var(--color-secondary);
  color: var(--color-white);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(166, 123, 123, 0.3);
}

.btn-small {
  padding: 8px 20px;
  font-size: var(--font-size-small);
}

/* ============================================
   卡片组件
   ============================================ */
.card {
  background: var(--color-white);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  border: 1px solid rgba(212, 165, 165, 0.08);
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-6px);
  border-color: rgba(212, 165, 165, 0.2);
}

/* ============================================
   导航栏
   ============================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: var(--shadow-nav);
  z-index: 1000;
  transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  border-bottom: 1px solid rgba(212, 165, 165, 0.08);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-nav-scrolled);
  border-bottom-color: rgba(212, 165, 165, 0.15);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.navbar-logo {
  font-family: var(--font-decorative);
  font-size: 24px;
  color: var(--color-secondary);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.navbar-logo .logo-cn {
  font-family: var(--font-cn-title);
  font-size: 18px;
  color: var(--color-title);
}

.navbar-links {
  display: flex;
  gap: var(--spacing-2xl);
  align-items: center;
}

.navbar-links a {
  color: var(--color-body);
  font-size: var(--font-size-body);
  transition: color 0.3s ease;
  position: relative;
}

.navbar-links a:hover,
.navbar-links a.active {
  color: var(--color-secondary);
}

.navbar-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary-gradient);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.navbar-links a:hover::after,
.navbar-links a.active::after {
  transform: scaleX(1);
}

.navbar-auth {
  position: relative;
}

.btn-login {
  padding: 10px 24px;
  border-radius: var(--radius-btn-primary);
  background: var(--color-primary-gradient);
  background-size: 150% 150%;
  color: var(--color-white);
  font-size: var(--font-size-small);
  font-weight: 500;
  transition: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
  box-shadow: 0 4px 14px rgba(212, 165, 165, 0.3);
  animation: gradientShift 6s ease infinite;
}

.btn-login:hover {
  box-shadow: var(--shadow-btn-hover), var(--shadow-glow);
  transform: translateY(-2px);
}

/* 登录下拉卡片 */
.login-dropdown {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  width: 280px;
  background: var(--color-white);
  border-radius: var(--radius-card);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.12);
  padding: var(--spacing-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
  z-index: 1001;
}

.login-dropdown.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.login-dropdown::before {
  content: '';
  position: absolute;
  top: -8px;
  right: 24px;
  width: 16px;
  height: 16px;
  background: var(--color-white);
  transform: rotate(45deg);
  box-shadow: -2px -2px 4px rgba(0, 0, 0, 0.04);
}

.qr-code-placeholder {
  width: 160px;
  height: 160px;
  margin: 0 auto var(--spacing-md);
  background: var(--color-bg-champagne);
  border-radius: var(--radius-card);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.qr-code-placeholder::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  background: repeating-conic-gradient(var(--color-primary-start) 0% 25%, var(--color-bg-champagne) 0% 50%) 50% / 20px 20px;
  opacity: 0.3;
}

.qr-code-placeholder span {
  position: relative;
  z-index: 1;
  color: var(--color-secondary);
  font-size: var(--font-size-small);
}

.login-dropdown-text {
  text-align: center;
  font-size: var(--font-size-small);
  color: var(--color-body);
  margin-bottom: var(--spacing-md);
}

.login-dropdown-link {
  display: block;
  text-align: center;
  color: var(--color-link);
  font-size: var(--font-size-small);
  margin-top: var(--spacing-sm);
}

.login-dropdown-link:hover {
  text-decoration: underline;
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--color-secondary);
  transition: all 0.3s ease;
}

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

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

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

/* 移动端底部导航 */
.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: var(--color-white);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.08);
  z-index: 999;
}

/* ============================================
   页脚
   ============================================ */
.footer {
  background: linear-gradient(180deg, #2D2D2D 0%, #1F1B1B 100%);
  color: var(--color-white);
  padding: var(--spacing-4xl) 0 var(--spacing-lg);
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--color-primary-gradient);
  background-size: 200% 100%;
  animation: gradientShift 8s ease infinite;
}

.footer::after {
  content: '';
  position: absolute;
  top: 20%; right: -10%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(212, 165, 165, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

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

.footer-brand-logo {
  font-family: var(--font-decorative);
  font-size: 28px;
  color: var(--color-primary-start);
  margin-bottom: var(--spacing-md);
}

.footer-brand-desc {
  font-size: var(--font-size-small);
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
  max-width: 300px;
}

.footer-links-title {
  font-size: var(--font-size-card-title);
  color: var(--color-white);
  margin-bottom: var(--spacing-lg);
  font-weight: 600;
}

.footer-links-list li {
  margin-bottom: var(--spacing-sm);
}

.footer-links-list a {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-small);
  transition: color 0.3s ease;
}

.footer-links-list a:hover {
  color: var(--color-primary-start);
}

.footer-social-icons {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.footer-social-icons a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.footer-social-icons a:hover {
  background: var(--color-primary-start);
}

.footer-contact {
  font-size: var(--font-size-small);
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  text-align: center;
  font-size: var(--font-size-small);
  color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   滚动动画
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1200px) {
  .container {
    max-width: 960px;
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-hero: 36px;
    --font-size-section-title: 28px;
    --font-size-card-title: 18px;
    --nav-height: 60px;
  }
  
  .navbar-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-nav);
    gap: var(--spacing-lg);
  }
  
  .navbar-links.show {
    display: flex;
  }
  
  .hamburger {
    display: flex;
  }
  
  .navbar-auth {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-nav);
    text-align: center;
    border-top: 1px solid #EFEFEF;
  }
  
  .navbar-auth.show-mobile {
    display: block;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
  }
  
  .mobile-bottom-nav {
    display: flex;
    align-items: center;
    justify-content: space-around;
  }
  
  .section {
    padding: var(--spacing-3xl) 0;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  :root {
    --font-size-hero: 28px;
    --font-size-section-title: 24px;
  }
}

/* ============================================
   占位图片样式
   ============================================ */
.placeholder-img {
  background: linear-gradient(135deg, var(--color-bg-champagne) 0%, #F7E8E8 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-secondary);
  font-size: var(--font-size-small);
  border-radius: var(--radius-card);
  overflow: hidden;
}

.placeholder-img::before {
  content: '';
  position: absolute;
  width: 40px;
  height: 40px;
  border: 2px solid var(--color-secondary);
  border-radius: 4px;
  opacity: 0.3;
}

/* SVG 图标基础样式 */
.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* 标签样式 */
.tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: var(--radius-tag);
  font-size: var(--font-size-small);
  font-weight: 500;
}

.tag-primary {
  background: var(--color-bg-champagne);
  color: var(--color-secondary);
}

/* 价格样式 */
.price {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
}

.price-current {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-error);
  font-family: var(--font-decorative);
}

.price-original {
  font-size: var(--font-size-body);
  color: var(--color-placeholder);
  text-decoration: line-through;
}

/* ============================================
   高级设计元素 - 装饰性模糊圆 / 网格渐变
   ============================================ */

/* 装饰性模糊圆 */
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  -webkit-filter: blur(80px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

.blob-rose {
  background: radial-gradient(circle, rgba(212, 165, 165, 0.4) 0%, transparent 70%);
}

.blob-champagne {
  background: radial-gradient(circle, rgba(251, 243, 240, 0.6) 0%, transparent 70%);
}

.blob-pink {
  background: radial-gradient(circle, rgba(238, 196, 196, 0.35) 0%, transparent 70%);
}

/* 浮动动画 */
@keyframes float {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(30px, -20px) rotate(2deg); }
  66% { transform: translate(-20px, 20px) rotate(-2deg); }
}

.float-anim {
  animation: float 12s ease-in-out infinite;
}

.float-anim-slow {
  animation: float 18s ease-in-out infinite;
}

/* 网格渐变背景 */
.bg-mesh-1 {
  background-color: var(--color-white);
  background-image: var(--gradient-mesh-1);
}

.bg-mesh-2 {
  background-color: var(--color-bg-champagne);
  background-image: var(--gradient-mesh-2);
}

/* 微妙图案叠加层 */
.pattern-overlay {
  position: relative;
}

.pattern-overlay::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: 
    radial-gradient(circle at 1px 1px, rgba(212, 165, 165, 0.06) 1px, transparent 0);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: 0;
}

/* 高级图片容器 */
.premium-image-frame {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 
    0 20px 60px rgba(212, 165, 165, 0.2),
    0 8px 24px rgba(164, 123, 123, 0.12);
  transition: all 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.premium-image-frame::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.15) 0%, transparent 50%);
  pointer-events: none;
  z-index: 1;
}

.premium-image-frame:hover {
  box-shadow: 
    0 30px 80px rgba(212, 165, 165, 0.3),
    0 12px 32px rgba(164, 123, 123, 0.18);
  transform: translateY(-4px);
}

.premium-image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.premium-image-frame:hover img {
  transform: scale(1.05);
}

/* 渐变文字 */
.gradient-text {
  background: var(--color-primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* 玻璃卡片 */
.glass-card {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-card);
  box-shadow: 0 8px 32px rgba(212, 165, 165, 0.12);
}