/* fashion-art-gallery-050410/frontend/public/styles/home.css */

/* =========================================
   首页变量定义
   ========================================= */
:root {
  --home-transition: 1.8s cubic-bezier(0.19, 1, 0.22, 1);
  --text-color: #ffffff;
  --font-primary: 'Source Han Sans CN', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --z-index-overlay: 9999;
  --z-index-nav: 1000;
  --z-index-content: 10;
}

/* =========================================
   基础布局重置
   ========================================= */
html, body {
  height: 100%;
  margin: 0;
  overflow: hidden; /* 首页禁止滚动，仅展示全屏 */
  background-color: #0a0a0a;
  font-family: var(--font-primary);
}

/* =========================================
   无滚动“瞬间” (The Moment - Intro Overlay)
   ========================================= */
#intro-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #ffffff;
  z-index: var(--z-index-overlay);
  display: flex;
  justify-content: center;
  align-items: center;
  pointer-events: none;
  animation: fadeOutOverlay 3.5s ease-in-out forwards;
}

.moment-visual {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  /* 模拟光影流动 */
  background: radial-gradient(circle at 50% 50%, #f5f5f7, #e0e0e0);
  animation: breathe 3.5s ease-in-out forwards;
}

/* =========================================
   全屏轮播 (Hero Carousel)
   ========================================= */
.carousel-container {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

.carousel-track {
  position: relative;
  width: 100%;
  height: 100%;
}

.slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity var(--home-transition);
  z-index: 1;
}

.slide.active {
  opacity: 1;
  z-index: 2;
}

.slide-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.08);
  transition: transform 8s ease-out; /* Ken Burns 效应 */
  filter: brightness(0.85) contrast(1.1);
}

.slide.active .slide-image {
  transform: scale(1);
}

/* 极简文案层 */
.slide-caption {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: var(--z-index-content);
  text-align: center;
  width: 100%;
  padding: 0 2rem;
  color: var(--text-color);
  mix-blend-mode: overlay; /* 艺术混合模式 */
}

.caption-text {
  font-size: 4rem;
  font-weight: 200;
  letter-spacing: 0.3em;
  margin: 0;
  opacity: 0;
  transform: translateY(40px);
  text-transform: uppercase;
  text-shadow: 0 0 30px rgba(255,255,255,0.1);
}

.slide.active .caption-text {
  animation: textSlideUp 1.5s cubic-bezier(0.22, 1, 0.36, 1) 0.5s forwards;
}

/* =========================================
   自定义导航 (覆盖在轮播之上)
   ========================================= */
/* 注意：实际导航HTML结构在index.html中，这里做样式适配 */
body.home-page nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  z-index: var(--z-index-nav);
  padding-top: 2rem;
  transition: opacity 1s ease;
  opacity: 0;
  animation: fadeInNav 1s ease 3s forwards; /* Intro结束后显现 */
}

body.home-page nav ul li a {
  color: rgba(255, 255, 255, 0.8);
  font-weight: 300;
  letter-spacing: 0.1em;
  font-size: 0.9rem;
}

body.home-page nav ul li a:hover {
  color: #ffffff;
  text-shadow: 0 0 10px rgba(255,255,255,0.5);
}

/* =========================================
   轮播进度/指示器
   ========================================= */
.carousel-progress {
  position: absolute;
  bottom: 3rem;
  right: 3rem;
  display: flex;
  gap: 1rem;
  z-index: var(--z-index-content);
}

.progress-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  cursor: pointer;
  transition: all 0.3s ease;
}

.progress-dot.active {
  background: #fff;
  transform: scale(1.5);
}

/* =========================================
   动画关键帧
   ========================================= */
@keyframes fadeOutOverlay {
  0% { opacity: 1; }
  80% { opacity: 1; }
  100% { opacity: 0; visibility: hidden; }
}

@keyframes breathe {
  0% { opacity: 0; transform: scale(0.98); }
  20% { opacity: 0.8; }
  100% { opacity: 1; transform: scale(1); }
}

@keyframes textSlideUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInNav {
  to { opacity: 1; }
}

/* =========================================
   响应式调整
   ========================================= */
@media (max-width: 768px) {
  .caption-text {
    font-size: 2.2rem;
    letter-spacing: 0.15em;
  }
  
  .carousel-progress {
    bottom: 2rem;
    right: 50%;
    transform: translateX(50%);
  }
  
  body.home-page nav {
    padding-top: 1rem;
  }
}