/* ==========================================================================
   社团组织网站 - 艺术化深度美化 (生机·信任·专业)
   特色：动态粒子、玻璃态、悬浮光晕、翠绿渐变+金色点缀
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS变量定义 - 色彩系统
   -------------------------------------------------------------------------- */
:root {
  /* 品牌主色系 - 翠绿渐变 */
  --org-green-deep: #0d3d16;
  --org-green: #1a6b2a;
  --org-green-light: #2d8a3e;
  --org-emerald: #10b981;
  --org-lime: #84cc16;
  
  /* 点缀色 - 金色 */
  --org-gold: #f59e0b;
  --org-gold-light: #fbbf24;
  --org-gold-glow: rgba(245, 158, 11, 0.4);
  
  /* 玻璃态色彩 */
  --glass-bg: rgba(255, 255, 255, 0.12);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-shadow: rgba(0, 0, 0, 0.1);
  
  /* 文字色 */
  --text-primary: #1a1a2e;
  --text-secondary: #4a5568;
  --text-light: rgba(255, 255, 255, 0.9);
  
  /* 动效时长 */
  --transition-fast: 0.2s;
  --transition-normal: 0.4s;
  --transition-slow: 0.8s;
}

/* --------------------------------------------------------------------------
   2. 粒子背景系统 - 动态生命粒子
   -------------------------------------------------------------------------- */
.particles-container {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.org-particle {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  animation: particleFloat linear infinite;
}

@keyframes particleFloat {
  0% {
    transform: translateY(100vh) rotate(0deg) scale(0);
    opacity: 0;
  }
  10% {
    opacity: 1;
    transform: translateY(90vh) rotate(36deg) scale(1);
  }
  90% {
    opacity: 0.8;
  }
  100% {
    transform: translateY(-10vh) rotate(360deg) scale(0.5);
    opacity: 0;
  }
}

/* 浮动圆环 - 有机生命感 */
.floating-ring-organic {
  position: absolute;
  border-radius: 50%;
  border: 2px solid;
  animation: organicFloat ease-in-out infinite;
  opacity: 0.6;
}

@keyframes organicFloat {
  0%, 100% {
    transform: translateY(0) scale(1) rotate(0deg);
    opacity: 0.4;
  }
  25% {
    transform: translateY(-20px) scale(1.05) rotate(90deg);
    opacity: 0.7;
  }
  50% {
    transform: translateY(-10px) scale(1.1) rotate(180deg);
    opacity: 0.6;
  }
  75% {
    transform: translateY(-25px) scale(1.02) rotate(270deg);
    opacity: 0.5;
  }
}

/* --------------------------------------------------------------------------
   3. 导航栏 - 玻璃态+滚动变色
   -------------------------------------------------------------------------- */
.nav-glass {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  transition: all var(--transition-normal) ease;
}

.nav-glass.scrolled {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
}

/* 导航链接悬浮效果 */
.nav-link-glow {
  position: relative;
  padding: 0.5rem 1rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-fast) ease;
  border-radius: 8px;
}

.nav-link-glow::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--org-emerald), var(--org-green-light));
  opacity: 0;
  transform: scale(0.9);
  border-radius: 8px;
  transition: all var(--transition-fast) ease;
}

.nav-link-glow:hover {
  color: white;
  text-shadow: 0 0 20px rgba(255, 255, 255, 0.8);
}

.nav-link-glow:hover::before {
  opacity: 1;
  transform: scale(1);
}

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

/* --------------------------------------------------------------------------
   4. Hero区域 - 动态渐变+金色粒子
   -------------------------------------------------------------------------- */
.hero-org-art {
  position: relative;
  background: linear-gradient(
    135deg,
    var(--org-green-deep) 0%,
    var(--org-green) 25%,
    var(--org-green-light) 50%,
    var(--org-emerald) 75%,
    var(--org-lime) 100%
  );
  background-size: 400% 400%;
  animation: gradientShift 15s ease infinite;
  overflow: hidden;
}

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

/* 光晕效果 */
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: glowPulse 4s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.4;
  }
  50% {
    transform: scale(1.2);
    opacity: 0.7;
  }
}

/* 金色高光线 */
.golden-ray {
  position: absolute;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--org-gold-light), transparent);
  animation: rayMove 8s ease-in-out infinite;
}

@keyframes rayMove {
  0%, 100% {
    opacity: 0;
    transform: translateX(-100%);
  }
  50% {
    opacity: 0.8;
    transform: translateX(100%);
  }
}

/* --------------------------------------------------------------------------
   5. 卡片系统 - 玻璃态+悬浮光晕
   -------------------------------------------------------------------------- */
.glass-card {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  overflow: hidden;
  transition: all var(--transition-normal) cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.6s ease;
}

.glass-card:hover::before {
  left: 100%;
}

.glass-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 
    0 25px 50px -12px rgba(0, 0, 0, 0.25),
    0 0 40px rgba(16, 185, 129, 0.2);
  border-color: rgba(16, 185, 129, 0.4);
}

/* 卡片光晕效果 */
.card-glow {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle at center,
    var(--org-gold-glow) 0%,
    transparent 50%
  );
  opacity: 0;
  transition: opacity var(--transition-normal) ease;
  pointer-events: none;
}

.glass-card:hover .card-glow {
  opacity: 1;
  animation: cardGlowRotate 4s linear infinite;
}

@keyframes cardGlowRotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* --------------------------------------------------------------------------
   6. 按钮系统 - 金色渐变+发光
   -------------------------------------------------------------------------- */
.btn-gold-gradient {
  position: relative;
  background: linear-gradient(
    135deg,
    var(--org-gold) 0%,
    var(--org-gold-light) 50%,
    var(--org-gold) 100%
  );
  background-size: 200% 200%;
  color: white;
  font-weight: 600;
  padding: 1rem 2rem;
  border-radius: 50px;
  box-shadow: 
    0 4px 15px rgba(245, 158, 11, 0.4),
    0 0 30px rgba(245, 158, 11, 0.2);
  transition: all var(--transition-normal) ease;
  overflow: hidden;
}

.btn-gold-gradient::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.4),
    transparent
  );
  transition: left 0.5s ease;
}

.btn-gold-gradient:hover {
  background-position: 100% 0;
  transform: translateY(-2px);
  box-shadow: 
    0 8px 25px rgba(245, 158, 11, 0.5),
    0 0 50px rgba(245, 158, 11, 0.3);
}

.btn-gold-gradient:hover::before {
  left: 100%;
}

.btn-gold-gradient:active {
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   7. 标签系统 - 呼吸光晕
   -------------------------------------------------------------------------- */
.tag-breathe {
  position: relative;
  padding: 0.4rem 1rem;
  background: linear-gradient(135deg, var(--org-emerald), var(--org-lime));
  color: white;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 50px;
  box-shadow: 0 2px 10px rgba(16, 185, 129, 0.3);
  animation: tagBreathe 3s ease-in-out infinite;
}

@keyframes tagBreathe {
  0%, 100% {
    box-shadow: 0 2px 10px rgba(16, 185, 129, 0.3);
  }
  50% {
    box-shadow: 0 2px 20px rgba(16, 185, 129, 0.5),
                0 0 30px rgba(132, 204, 22, 0.3);
  }
}

/* --------------------------------------------------------------------------
   8. 统计数字 - 数字跳动
   -------------------------------------------------------------------------- */
.stat-number {
  font-size: 3rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--org-gold), var(--org-gold-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 40px rgba(245, 158, 11, 0.3);
  animation: numberPulse 2s ease-in-out infinite;
}

@keyframes numberPulse {
  0%, 100% {
    transform: scale(1);
    filter: brightness(1);
  }
  50% {
    transform: scale(1.05);
    filter: brightness(1.2);
  }
}

/* --------------------------------------------------------------------------
   9. 滚动动画 - 淡入上浮
   -------------------------------------------------------------------------- */
.scroll-reveal-art {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.scroll-reveal-art.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* 交错动画 */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }

/* --------------------------------------------------------------------------
   10. Logo动画 - 叶片摇摆+发光
   -------------------------------------------------------------------------- */
.logo-animate {
  animation: logoFloat 4s ease-in-out infinite;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
  transition: all var(--transition-normal) ease;
}

.logo-animate:hover {
  animation: logoGlow 1.5s ease-in-out infinite;
  filter: drop-shadow(0 0 20px rgba(16, 185, 129, 0.6));
}

@keyframes logoFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  25% { transform: translateY(-5px) rotate(2deg); }
  75% { transform: translateY(-3px) rotate(-2deg); }
}

@keyframes logoGlow {
  0%, 100% {
    filter: drop-shadow(0 0 10px rgba(16, 185, 129, 0.4));
  }
  50% {
    filter: drop-shadow(0 0 25px rgba(16, 185, 129, 0.8));
  }
}

/* --------------------------------------------------------------------------
   11. 背景装饰 - 几何图形动画
   -------------------------------------------------------------------------- */
.geo-shape {
  position: absolute;
  opacity: 0.1;
  animation: geoFloat 20s ease-in-out infinite;
}

@keyframes geoFloat {
  0%, 100% {
    transform: translate(0, 0) rotate(0deg);
  }
  25% {
    transform: translate(20px, -30px) rotate(90deg);
  }
  50% {
    transform: translate(-10px, -20px) rotate(180deg);
  }
  75% {
    transform: translate(30px, 10px) rotate(270deg);
  }
}

/* 六边形网格 */
.hex-grid {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='28' height='49' viewBox='0 0 28 49'%3E%3Cg fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M13.99 9.25l13 7.5v15l-13 7.5L1 31.75v-15l12.99-7.5zM3 17.9v12.7l10.99 6.34 11-6.35V17.9l-11-6.34L3 17.9zM0 15l12.98-7.5V0h-2v6.35L0 12.69v2.3zm0 18.5L12.98 41v8h-2v-6.85L0 35.81v-2.3zM15 0v7.5L27.99 15H28v-2.31h-.01L17 6.35V0h-2zm0 49v-8l12.99-7.5H28v2.31h-.01L17 42.15V49h-2z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  animation: hexFloat 30s linear infinite;
}

@keyframes hexFloat {
  0% { transform: translateY(0); }
  100% { transform: translateY(-49px); }
}

/* --------------------------------------------------------------------------
   12. 页面切换动画
   -------------------------------------------------------------------------- */
.page-transition {
  animation: pageIn 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes pageIn {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --------------------------------------------------------------------------
   13. 鼠标跟随效果
   -------------------------------------------------------------------------- */
.cursor-follower {
  position: fixed;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--org-gold-glow), transparent);
  pointer-events: none;
  transform: translate(-50%, -50%);
  transition: transform 0.1s ease, width 0.3s ease, height 0.3s ease;
  z-index: 9999;
  opacity: 0;
}

body:hover .cursor-follower {
  opacity: 1;
}

.cursor-follower.hover {
  width: 60px;
  height: 60px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.4), transparent);
}

/* --------------------------------------------------------------------------
   14. 响应式优化
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
  .hero-org-art {
    min-height: 500px;
  }
  
  .stat-number {
    font-size: 2rem;
  }
  
  .glass-card:hover {
    transform: translateY(-4px) scale(1.01);
  }
}

/* --------------------------------------------------------------------------
   15. 特殊效果类
   -------------------------------------------------------------------------- */

/* 文字渐变 */
.text-gradient-org {
  background: linear-gradient(135deg, var(--org-gold), var(--org-gold-light), white);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% auto;
  animation: textShine 3s linear infinite;
}

@keyframes textShine {
  0% { background-position: 0% center; }
  100% { background-position: 200% center; }
}

/* 边框流光 */
.border-flow {
  position: relative;
}

.border-flow::after {
  content: '';
  position: absolute;
  inset: -2px;
  background: linear-gradient(90deg, var(--org-emerald), var(--org-gold), var(--org-emerald));
  border-radius: inherit;
  z-index: -1;
  opacity: 0;
  animation: borderFlow 3s linear infinite;
}

@keyframes borderFlow {
  0% { opacity: 0; }
  50% { opacity: 1; }
  100% { opacity: 0; }
}

/* 发光边框 */
.glow-border {
  box-shadow: 
    0 0 5px var(--org-emerald),
    0 0 20px rgba(16, 185, 129, 0.3),
    inset 0 0 20px rgba(16, 185, 129, 0.1);
}

/* 呼吸灯 */
.breathe-light {
  animation: breatheLight 3s ease-in-out infinite;
}

@keyframes breatheLight {
  0%, 100% {
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.3);
  }
  50% {
    box-shadow: 
      0 0 30px rgba(16, 185, 129, 0.6),
      0 0 60px rgba(132, 204, 22, 0.3);
  }
}