/* ============================================
   庆南大学MBA官网 - 全局自定义样式
   ============================================ */

/* ---------- CSS 变量 ---------- */
:root {
  --color-kyu-green-900: #1A3D28;
  --color-kyu-green-800: #2D5A3D;
  --color-kyu-green-700: #3A7350;
  --color-kyu-green-600: #478C63;
  --color-kyu-green-500: #54A576;
  --color-kyu-green-100: #E8F5EC;
  --color-kyu-green-50:  #F2FAF5;
  --color-kyu-gold-600:  #B8860B;
  --color-kyu-gold-500:  #D4A843;
  --color-kyu-gold-400:  #E8C468;
  --color-kyu-gold-100:  #FFF8E7;
}

/* ---------- 基础样式 ---------- */
html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  color: #1A1A2E;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- 滚动渐显动画 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}
[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}
[data-reveal][data-delay="1"] { transition-delay: 0.1s; }
[data-reveal][data-delay="2"] { transition-delay: 0.2s; }
[data-reveal][data-delay="3"] { transition-delay: 0.3s; }
[data-reveal][data-delay="4"] { transition-delay: 0.4s; }
[data-reveal][data-delay="5"] { transition-delay: 0.5s; }

/* ---------- Hero 区块 ---------- */
.hero-section {
  position: relative;
  overflow: hidden;
}
.hero-section::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, rgba(26,61,40,0.72) 0%, rgba(26,61,40,0.45) 55%, rgba(26,61,40,0.25) 100%);
  z-index: 2;
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 3;
}
.hero-bg, .hero-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero-slide {
  opacity: 0;
  transition: opacity 1.4s ease-in-out;
  z-index: 1;
}
.hero-slide.active {
  opacity: 1;
}
.hero-indicators {
  position: absolute;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 4;
  display: flex;
  gap: 0.5rem;
}
.hero-indicator {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(255,255,255,0.45);
  border: none;
  padding: 0;
  cursor: pointer;
  transition: width 0.3s, background 0.3s;
}
.hero-indicator.active {
  width: 24px;
  background: rgba(255,255,255,0.95);
}

/* ---------- 页面内部 Hero ---------- */
.page-hero {
  position: relative;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, #1A3D28, #2D5A3D, #3A7350);
}
.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

/* ---------- 区块交替背景 ---------- */
.section-alt {
  background-color: var(--color-kyu-green-50);
}

/* ---------- 卡片悬浮效果 ---------- */
.card-hover {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px -8px rgba(0,0,0,0.12);
}

/* ---------- 数字计数动画 ---------- */
.stat-number {
  font-variant-numeric: tabular-nums;
  font-weight: 800;
}

/* ---------- 脉冲动画（紧迫感） ---------- */
@keyframes pulse-soft {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}
.pulse-urgency {
  animation: pulse-soft 2s ease-in-out infinite;
}

/* ---------- 渐变文字 ---------- */
.text-gradient {
  background: linear-gradient(135deg, #D4A843 0%, #E8C468 50%, #D4A843 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- FAQ 手风琴 ---------- */
details.faq-item {
  border-bottom: 1px solid #E5E7EB;
}
details.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 1.25rem 0;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
details.faq-item summary::-webkit-details-marker {
  display: none;
}
details.faq-item summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  color: #6B7280;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
details.faq-item[open] summary::after {
  content: '−';
  color: var(--color-kyu-green-800);
}
details.faq-item .faq-answer {
  padding-bottom: 1.25rem;
  color: #374151;
  line-height: 1.75;
}

/* ---------- 图片画廊 ---------- */
.gallery-scroll {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  gap: 1rem;
  padding-bottom: 1rem;
}
.gallery-scroll::-webkit-scrollbar {
  height: 4px;
}
.gallery-scroll::-webkit-scrollbar-track {
  background: #E5E7EB;
  border-radius: 2px;
}
.gallery-scroll::-webkit-scrollbar-thumb {
  background: var(--color-kyu-green-500);
  border-radius: 2px;
}
.gallery-scroll > * {
  scroll-snap-align: start;
  flex-shrink: 0;
}

/* ---------- 悬浮CTA ---------- */
.floating-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 40;
  transform: translateY(100%);
  transition: transform 0.4s ease;
  padding-bottom: env(safe-area-inset-bottom, 0px);
}
.floating-cta.visible {
  transform: translateY(0);
}

/* ---------- 时间线 ---------- */
.timeline-line {
  position: absolute;
  left: 1.25rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-kyu-green-500), var(--color-kyu-green-100));
}
@media (min-width: 768px) {
  .timeline-line {
    left: 50%;
    transform: translateX(-50%);
  }
}

/* ---------- 信任徽章条 ---------- */
.trust-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}
.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1rem;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 9999px;
  font-size: 0.8125rem;
  color: white;
  backdrop-filter: blur(4px);
}

/* ---------- 表单 ---------- */
.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1.5px solid #E5E7EB;
  border-radius: 0.75rem;
  font-size: 1rem; /* >= 16px 防iOS缩放 */
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  background: white;
}
.form-input:focus {
  border-color: var(--color-kyu-green-500);
  box-shadow: 0 0 0 3px rgba(84,165,118,0.15);
}
.form-input.error {
  border-color: #EF4444;
}
.form-input.valid {
  border-color: var(--color-kyu-green-500);
}

/* ---------- 费用对比条 ---------- */
.cost-bar {
  height: 2rem;
  border-radius: 0.5rem;
  transition: width 1.5s ease-out;
}

/* ---------- 响应式微调 ---------- */
@media (max-width: 640px) {
  .page-hero {
    min-height: 160px;
  }
  .hero-section {
    min-height: 100svh;
  }
}

/* ---------- 减弱动画偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .pulse-urgency {
    animation: none;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ---------- 打印样式 ---------- */
@media print {
  #main-nav,
  .floating-cta,
  #mobile-menu {
    display: none !important;
  }
  .hero-section {
    min-height: auto;
    padding: 2rem 0;
  }
  body {
    color: #000;
  }
}