/**
 * 渊渟集团官网 - CSS动画定义
 * 纯CSS动效，支持 reduced-motion
 */

/* ========== 基础淡入动画 ========== */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ========== 缩放淡入 ========== */
@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ========== 浮动动画 ========== */
@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes floatSlow {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
}

/* ========== 下划线展开动画 ========== */
@keyframes underlineExpand {
  from {
    transform: scaleX(0);
    transform-origin: left;
  }
  to {
    transform: scaleX(1);
    transform-origin: left;
  }
}

/* ========== 脉冲动画 ========== */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}

/* ========== 呼吸光晕 ========== */
@keyframes breathe {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(196, 92, 72, 0.2);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(196, 92, 72, 0);
  }
}

/* ========== 滚动指示器弹跳 ========== */
@keyframes bounceDown {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0) translateX(-50%);
  }
  40% {
    transform: translateY(-10px) translateX(-50%);
  }
  60% {
    transform: translateY(-5px) translateX(-50%);
  }
}

/* ========== 菜单展开动画 ========== */
@keyframes menuSlideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes menuSlideOut {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100%);
  }
}

/* ========== 渐显遮罩 ========== */
@keyframes revealMask {
  from {
    clip-path: inset(0 100% 0 0);
  }
  to {
    clip-path: inset(0 0 0 0);
  }
}

/* ========== 动画工具类 ========== */

/* 基础淡入 */
.animate-fade-in {
  animation: fadeIn var(--transition-slow) var(--ease-out) forwards;
}

/* 淡入上滑 */
.animate-fade-in-up {
  animation: fadeInUp var(--transition-slow) var(--ease-out) forwards;
}

/* 淡入下滑 */
.animate-fade-in-down {
  animation: fadeInDown var(--transition-slow) var(--ease-out) forwards;
}

/* 淡入左滑 */
.animate-fade-in-left {
  animation: fadeInLeft var(--transition-slow) var(--ease-out) forwards;
}

/* 淡入右滑 */
.animate-fade-in-right {
  animation: fadeInRight var(--transition-slow) var(--ease-out) forwards;
}

/* 缩放淡入 */
.animate-fade-in-scale {
  animation: fadeInScale var(--transition-slow) var(--ease-out) forwards;
}

/* 浮动 */
.animate-float {
  animation: float 3s var(--ease-in-out) infinite;
}

.animate-float-slow {
  animation: floatSlow 4s var(--ease-in-out) infinite;
}

/* 脉冲 */
.animate-pulse {
  animation: pulse 2s var(--ease-in-out) infinite;
}

/* 呼吸 */
.animate-breathe {
  animation: breathe 2s var(--ease-in-out) infinite;
}

/* 弹跳 */
.animate-bounce-down {
  animation: bounceDown 2s var(--ease-in-out) infinite;
}

/* ========== 动画延迟工具类 ========== */
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }
.delay-500 { animation-delay: 500ms; }
.delay-600 { animation-delay: 600ms; }
.delay-700 { animation-delay: 700ms; }
.delay-800 { animation-delay: 800ms; }

/* ========== 初始状态（用于JS触发） ========== */
.js-animate {
  opacity: 0;
}

.js-animate.is-visible {
  opacity: 1;
}

.js-animate-fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow) var(--ease-out),
              transform var(--transition-slow) var(--ease-out);
}

.js-animate-fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.js-animate-fade-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity var(--transition-slow) var(--ease-out),
              transform var(--transition-slow) var(--ease-out);
}

.js-animate-fade-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.js-animate-fade-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity var(--transition-slow) var(--ease-out),
              transform var(--transition-slow) var(--ease-out);
}

.js-animate-fade-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.js-animate-scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity var(--transition-slow) var(--ease-out),
              transform var(--transition-slow) var(--ease-out);
}

.js-animate-scale.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* 交错动画延迟 */
.stagger-1 { transition-delay: 0ms; }
.stagger-2 { transition-delay: 100ms; }
.stagger-3 { transition-delay: 200ms; }
.stagger-4 { transition-delay: 300ms; }
.stagger-5 { transition-delay: 400ms; }
.stagger-6 { transition-delay: 500ms; }

/* ========== 减少动画偏好支持 ========== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .js-animate,
  .js-animate-fade-up,
  .js-animate-fade-left,
  .js-animate-fade-right,
  .js-animate-scale {
    opacity: 1;
    transform: none;
    transition: none;
  }
}