/* ===================================
   瑞辰华诺 - 宠物医院集团官网复刻
   Design System & Main Stylesheet
   =================================== */

/* ===== Design Tokens ===== */
:root {
  /* Primary Colors - Pet Medical Green/Teal */
  --color-primary: #2BAE9B;
  --color-primary-dark: #1a8b7d;
  --color-primary-light: #3dc4b0;
  --color-primary-bg: #e8f5f3;
  --color-primary-gradient: linear-gradient(135deg, #2BAE9B 0%, #1a8b7d 100%);

  /* Accent Colors */
  --color-accent: #f5a623;
  --color-accent-dark: #d68f10;
  --color-accent-bg: #fff8ec;

  /* Neutral Colors */
  --color-white: #ffffff;
  --color-bg: #f8f9fa;
  --color-bg-alt: #f0f2f5;
  --color-border: #e0e3e7;
  --color-text: #2c3e50;
  --color-text-secondary: #5a6c7d;
  --color-text-light: #95a5a6;
  --color-text-white: #ffffff;

  /* Typography */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Noto Serif SC", "SimSun", serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-size-2xl: 32px;
  --font-size-3xl: 42px;
  --font-size-4xl: 56px;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;
  --space-2xl: 64px;
  --space-3xl: 96px;

  /* Layout */
  --container-max: 1200px;
  --header-height: 80px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --shadow-primary: 0 4px 20px rgba(43,174,155,0.3);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { font-size: var(--font-size-base); scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-primary); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* ===== Layout ===== */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-lg); }
.container-fluid { width: 100%; padding: 0 var(--space-lg); }
.section { padding: var(--space-3xl) 0; }
.section-sm { padding: var(--space-2xl) 0; }
.section-bg { background: var(--color-bg); }
.section-primary { background: var(--color-primary-gradient); color: var(--color-text-white); }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* ===== Typography ===== */
.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  position: relative;
}
.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--color-primary);
  border-radius: 2px;
  margin-top: var(--space-sm);
}
.section-title.center::after { margin-left: auto; margin-right: auto; }
.section-title.center { text-align: center; }

.section-subtitle {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.section-header { margin-bottom: var(--space-2xl); }
.section-header.center { text-align: center; }
.section-header.center .section-title::after { margin: var(--space-sm) auto 0; }

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  transition: all var(--transition-base);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  box-shadow: var(--shadow-sm);
  border-bottom-color: var(--color-border);
}
.site-header.transparent {
  background: transparent;
}
.site-header.transparent.scrolled {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
}

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

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary);
}
.logo-icon {
  width: 44px;
  height: 44px;
  background: var(--color-primary-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 20px;
}
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-text .main { font-size: var(--font-size-lg); color: var(--color-primary); }
.logo-text .sub { font-size: var(--font-size-xs); color: var(--color-text-light); letter-spacing: 1px; }

/* Navigation */
.main-nav { display: flex; align-items: center; gap: 0; }
.nav-item { position: relative; }
.nav-link {
  display: block;
  padding: 0 var(--space-lg);
  height: var(--header-height);
  line-height: var(--header-height);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition-fast);
  position: relative;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 3px;
  background: var(--color-primary);
  transition: all var(--transition-base);
  transform: translateX(-50%);
}
.nav-item:hover .nav-link::after,
.nav-item.active .nav-link::after { width: 60%; }
.nav-item.active .nav-link { color: var(--color-primary); }

/* Dropdown */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 180px;
  background: var(--color-white);
  box-shadow: var(--shadow-md);
  border-radius: var(--radius-md);
  padding: var(--space-sm) 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-base);
}
.nav-item:hover .nav-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-dropdown a {
  display: block;
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}
.nav-dropdown a:hover { color: var(--color-primary); background: var(--color-primary-bg); padding-left: calc(var(--space-lg) + 4px); }

/* Mobile menu toggle */
.menu-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: var(--space-sm); }
.menu-toggle span { width: 24px; height: 2px; background: var(--color-text); transition: all var(--transition-base); border-radius: 2px; }
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== Banner / Hero ===== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  max-height: 800px;
  overflow: hidden;
  margin-top: 0;
}
.hero.transparent-header { margin-top: calc(-1 * var(--header-height)); padding-top: var(--header-height); }

.hero-slides { position: relative; width: 100%; height: 100%; }
.hero-slide {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-slide.active { opacity: 1; }
.hero-slide-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}
.hero-slide-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,139,125,0.6) 0%, rgba(43,174,155,0.3) 50%, rgba(0,0,0,0.4) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--color-text-white);
  max-width: 800px;
  padding: 0 var(--space-lg);
  animation: fadeInUp 1s ease-out;
}
.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--space-md);
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
  line-height: 1.2;
}
.hero-subtitle {
  font-size: var(--font-size-xl);
  font-weight: 300;
  opacity: 0.95;
  letter-spacing: 3px;
}
.hero-en {
  font-size: var(--font-size-sm);
  opacity: 0.7;
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-top: var(--space-sm);
}

/* Hero controls */
.hero-dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-sm);
  z-index: 3;
}
.hero-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.hero-dot.active { background: var(--color-white); width: 30px; border-radius: 5px; }

.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 24px;
  cursor: pointer;
  z-index: 3;
  transition: all var(--transition-fast);
}
.hero-arrow:hover { background: rgba(255,255,255,0.3); }
.hero-arrow.prev { left: 30px; }
.hero-arrow.next { right: 30px; }

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  color: white;
  font-size: var(--font-size-xs);
  text-align: center;
  opacity: 0.8;
  animation: bounce 2s infinite;
}
.scroll-indicator::after {
  content: '';
  display: block;
  width: 1px;
  height: 30px;
  background: white;
  margin: var(--space-sm) auto 0;
}

/* ===== Page Banner (inner pages) ===== */
.page-banner {
  height: 400px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  margin-top: var(--header-height);
}
.page-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,139,125,0.7) 0%, rgba(43,174,155,0.4) 100%);
}
.page-banner-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: white;
}
.page-banner h1 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}
.page-banner p { font-size: var(--font-size-base); opacity: 0.9; letter-spacing: 2px; }

/* Breadcrumb */
.breadcrumb {
  padding: var(--space-md) 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}
.breadcrumb ul { display: flex; gap: var(--space-sm); align-items: center; }
.breadcrumb li { font-size: var(--font-size-sm); color: var(--color-text-light); }
.breadcrumb li:not(:last-child)::after { content: '/'; margin-left: var(--space-sm); color: var(--color-text-light); }
.breadcrumb li:last-child { color: var(--color-primary); }
.breadcrumb a:hover { color: var(--color-primary); }

/* ===== Cards ===== */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }

.card-image { width: 100%; height: 240px; object-fit: cover; background: var(--color-bg-alt); display: flex; align-items: center; justify-content: center; }
.card-body { padding: var(--space-lg); }
.card-title { font-size: var(--font-size-lg); font-weight: 600; margin-bottom: var(--space-sm); }
.card-text { font-size: var(--font-size-sm); color: var(--color-text-secondary); line-height: 1.7; }

/* ===== Grid ===== */
.grid { display: grid; gap: var(--space-lg); }
.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-5 { grid-template-columns: repeat(5, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }

/* ===== Specialty Cards ===== */
.specialty-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-md);
}
.specialty-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.specialty-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--color-primary-gradient);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}
.specialty-card:hover::before { transform: scaleX(1); }
.specialty-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-primary);
  transform: translateY(-4px);
}
.specialty-card .icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-sm);
  background: var(--color-primary-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--color-primary);
  transition: all var(--transition-base);
}
.specialty-card:hover .icon { background: var(--color-primary); color: white; transform: scale(1.1); }
.specialty-card .name { font-size: var(--font-size-sm); font-weight: 600; color: var(--color-text); }
.specialty-card .level { font-size: var(--font-size-xs); color: var(--color-text-light); margin-top: 2px; }

/* ===== Stats ===== */
.stats-section {
  background: var(--color-primary-gradient);
  padding: var(--space-2xl) 0;
  color: white;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  text-align: center;
}
.stat-item .number {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  line-height: 1;
}
.stat-item .number .unit { font-size: var(--font-size-lg); font-weight: 400; }
.stat-item .label { font-size: var(--font-size-sm); opacity: 0.9; margin-top: var(--space-sm); letter-spacing: 1px; }

/* ===== News Cards ===== */
.news-list { display: flex; flex-direction: column; gap: var(--space-lg); }
.news-item {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-lg);
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  cursor: pointer;
}
.news-item:hover { box-shadow: var(--shadow-md); transform: translateX(4px); }
.news-date {
  flex-shrink: 0;
  width: 100px;
  text-align: center;
  border-right: 2px solid var(--color-border);
  padding-right: var(--space-lg);
}
.news-date .day { font-size: var(--font-size-2xl); font-weight: 700; color: var(--color-primary); }
.news-date .month { font-size: var(--font-size-xs); color: var(--color-text-light); }
.news-content { flex: 1; }
.news-content h3 { font-size: var(--font-size-lg); font-weight: 600; margin-bottom: var(--space-sm); transition: color var(--transition-fast); }
.news-item:hover .news-content h3 { color: var(--color-primary); }
.news-content p { font-size: var(--font-size-sm); color: var(--color-text-secondary); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-tag { display: inline-block; padding: 2px 10px; background: var(--color-primary-bg); color: var(--color-primary); border-radius: 20px; font-size: var(--font-size-xs); margin-top: var(--space-sm); }

/* ===== Doctor Cards ===== */
.doctor-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}
.doctor-card {
  text-align: center;
  transition: all var(--transition-base);
}
.doctor-avatar {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  margin: 0 auto var(--space-md);
  background: var(--color-bg-alt);
  border: 4px solid var(--color-white);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}
.doctor-card:hover .doctor-avatar { border-color: var(--color-primary); transform: scale(1.05); }
.doctor-name { font-size: var(--font-size-lg); font-weight: 600; color: var(--color-text); }
.doctor-hospital { font-size: var(--font-size-sm); color: var(--color-text-secondary); margin-top: var(--space-xs); }
.doctor-level { display: inline-block; padding: 2px 10px; background: var(--color-accent-bg); color: var(--color-accent-dark); border-radius: 20px; font-size: var(--font-size-xs); margin-top: var(--space-sm); }

/* ===== Map Section ===== */
.map-section {
  background: var(--color-bg);
  padding: var(--space-3xl) 0;
}
.map-container {
  display: flex;
  gap: var(--space-2xl);
  align-items: center;
}
.map-visual {
  flex: 1;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  text-align: center;
}
.map-info { flex: 0 0 320px; }
.map-info h3 { font-size: var(--font-size-xl); margin-bottom: var(--space-md); }
.map-info p { font-size: var(--font-size-sm); color: var(--color-text-secondary); line-height: 1.8; margin-bottom: var(--space-lg); }
.province-select {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  background: var(--color-white);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}
.province-select:focus { border-color: var(--color-primary); outline: none; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
}
.btn-primary { background: var(--color-primary-gradient); color: white; box-shadow: var(--shadow-primary); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 25px rgba(43,174,155,0.4); color: white; }
.btn-outline { border: 2px solid var(--color-primary); color: var(--color-primary); background: transparent; }
.btn-outline:hover { background: var(--color-primary); color: white; }
.btn-white { background: rgba(255,255,255,0.15); backdrop-filter: blur(5px); color: white; border: 1px solid rgba(255,255,255,0.3); }
.btn-white:hover { background: rgba(255,255,255,0.25); color: white; }
.btn-lg { padding: var(--space-lg) var(--space-2xl); font-size: var(--font-size-base); }

/* ===== Footer ===== */
.site-footer {
  background: #1a2a3a;
  color: rgba(255,255,255,0.7);
  padding: var(--space-2xl) 0 var(--space-lg);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}
.footer-brand .logo { color: white; margin-bottom: var(--space-md); }
.footer-brand .logo-text .main { color: white; }
.footer-brand .logo-text .sub { color: rgba(255,255,255,0.5); }
.footer-brand p { font-size: var(--font-size-sm); line-height: 1.8; max-width: 300px; }
.footer-col h4 { font-size: var(--font-size-base); color: white; margin-bottom: var(--space-md); font-weight: 600; }
.footer-col ul li { margin-bottom: var(--space-sm); }
.footer-col ul li a { font-size: var(--font-size-sm); color: rgba(255,255,255,0.6); transition: color var(--transition-fast); }
.footer-col ul li a:hover { color: var(--color-primary-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,0.4);
}
.footer-qr { display: flex; gap: var(--space-lg); }
.footer-qr-item { text-align: center; }
.footer-qr-item .qr-box { width: 80px; height: 80px; background: rgba(255,255,255,0.1); border-radius: var(--radius-sm); margin-bottom: var(--space-xs); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.3); font-size: 10px; }
.footer-qr-item span { font-size: var(--font-size-xs); color: rgba(255,255,255,0.5); }

/* ===== Content Detail Page ===== */
.detail-page { padding: var(--space-2xl) 0; }
.detail-header { text-align: center; margin-bottom: var(--space-2xl); padding-bottom: var(--space-xl); border-bottom: 1px solid var(--color-border); }
.detail-header h1 { font-size: var(--font-size-2xl); margin-bottom: var(--space-md); }
.detail-meta { display: flex; justify-content: center; gap: var(--space-lg); font-size: var(--font-size-sm); color: var(--color-text-light); }
.detail-body { font-size: var(--font-size-base); line-height: 1.9; color: var(--color-text-secondary); }
.detail-body p { margin-bottom: var(--space-md); }
.detail-body h2, .detail-body h3 { color: var(--color-text); margin: var(--space-lg) 0 var(--space-md); font-weight: 600; }
.detail-body img { border-radius: var(--radius-md); margin: var(--space-md) 0; }

/* ===== Pagination ===== */
.pagination { display: flex; justify-content: center; gap: var(--space-xs); margin-top: var(--space-2xl); }
.pagination a, .pagination span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  cursor: pointer;
}
.pagination a:hover, .pagination .active { background: var(--color-primary); color: white; border-color: var(--color-primary); }

/* ===== Tabs ===== */
.tabs { display: flex; gap: 0; border-bottom: 2px solid var(--color-border); margin-bottom: var(--space-xl); }
.tab {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  position: relative;
  transition: color var(--transition-fast);
}
.tab::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}
.tab.active { color: var(--color-primary); }
.tab.active::after { transform: scaleX(1); }
.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.5s ease; }

/* ===== Animations ===== */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes bounce { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(-10px); } }
@keyframes slideInLeft { from { opacity: 0; transform: translateX(-50px); } to { opacity: 1; transform: translateX(0); } }
@keyframes slideInRight { from { opacity: 0; transform: translateX(50px); } to { opacity: 1; transform: translateX(0); } }

.fade-in-up { animation: fadeInUp 0.8s ease-out; }
.animate-on-scroll { opacity: 0; transform: translateY(30px); transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1); }
.animate-on-scroll.visible { opacity: 1; transform: translateY(0); }

/* ===== Utility ===== */
.hidden { display: none !important; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.text-primary { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }
.text-white { color: white; }
.bg-primary { background: var(--color-primary); }
.bg-light { background: var(--color-bg); }
.fw-bold { font-weight: 700; }
.fw-600 { font-weight: 600; }
.rounded { border-radius: var(--radius-md); }
.shadow { box-shadow: var(--shadow-sm); }