/* ========================================
   高端UI增强样式 - Premium UI Enhancement
   高端、高级美感、大气、层次感、质感、活力
   ======================================== */

/* CSS变量 - 主题色（由JS动态设置） */
:root {
  --primary: #8B4513;
  --secondary: #D4A574;
  --accent: #C9A96E;
  --bg-light: #FAF6F0;
  --dark: #2C1810;
  --text-primary: #1a1a2e;
  --text-secondary: #666;
  --text-light: #999;
  --border: #e8e8e8;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.15);
  --shadow-xl: 0 30px 80px rgba(0,0,0,0.2);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 全局重置增强 */
* {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  color: var(--text-primary);
  background: var(--bg-light);
  overflow-x: hidden;
  line-height: 1.7;
}

/* ========================================
   文字特效
   ======================================== */

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

/* 发光文字 */
.glow-text {
  text-shadow: 0 0 20px rgba(139, 69, 19, 0.3), 0 0 40px rgba(139, 69, 19, 0.1);
}

/* 打字机效果 */
.typewriter {
  overflow: hidden;
  border-right: 3px solid var(--primary);
  white-space: nowrap;
  animation: typing 3.5s steps(40, end), blink-caret 0.75s step-end infinite;
}

@keyframes typing {
  from { width: 0 }
  to { width: 100% }
}

@keyframes blink-caret {
  from, to { border-color: transparent }
  50% { border-color: var(--primary) }
}

/* 文字上浮动画 */
.text-float {
  animation: textFloat 3s ease-in-out infinite;
}

@keyframes textFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ========================================
   卡片特效
   ======================================== */

.premium-card {
  background: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.04);
}

.premium-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--secondary));
  transform: scaleX(0);
  transition: transform 0.5s ease;
  transform-origin: left;
}

.premium-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.premium-card:hover::before {
  transform: scaleX(1);
}

/* 玻璃拟态卡片 */
.glass-card {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

/* 3D翻转卡片 */
.flip-card {
  perspective: 1000px;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.8s;
  transform-style: preserve-3d;
}

.flip-card:hover .flip-card-inner {
  transform: rotateY(180deg);
}

.flip-card-front, .flip-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: var(--radius-md);
}

.flip-card-back {
  transform: rotateY(180deg);
}

/* ========================================
   图片特效
   ======================================== */

.premium-image {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
}

.premium-image img {
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1), filter 0.6s ease;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.premium-image:hover img {
  transform: scale(1.1);
  filter: brightness(1.05) saturate(1.1);
}

.premium-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(139,69,19,0.1) 0%, transparent 50%, rgba(201,169,110,0.1) 100%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.premium-image:hover::after {
  opacity: 1;
}

/* 图片缩放+边框光效 */
.image-glow {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.image-glow::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: linear-gradient(45deg, var(--primary), var(--accent), var(--secondary), var(--primary));
  background-size: 400% 400%;
  border-radius: var(--radius-md);
  z-index: -1;
  animation: gradientShift 3s ease infinite;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.image-glow:hover::before {
  opacity: 1;
}

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

/* ========================================
   按钮特效
   ======================================== */

.premium-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: #fff;
  border: none;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  overflow: hidden;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(139, 69, 19, 0.3);
}

.premium-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.6s ease;
}

.premium-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(139, 69, 19, 0.4);
}

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

.premium-btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
  box-shadow: none;
}

.premium-btn-outline:hover {
  background: var(--primary);
  color: #fff;
}

/* ========================================
   背景特效
   ======================================== */

/* 渐变背景 */
.gradient-bg {
  background: linear-gradient(135deg, var(--bg-light) 0%, #fff 50%, var(--bg-light) 100%);
  background-size: 200% 200%;
  animation: gradientBG 15s ease infinite;
}

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

/* 网格背景 */
.grid-bg {
  background-image: 
    linear-gradient(rgba(139, 69, 19, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 69, 19, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
}

/* 粒子背景容器 */
.particles-bg {
  position: relative;
  overflow: hidden;
}

.particles-bg::before {
  content: '';
  position: absolute;
  width: 200%;
  height: 200%;
  top: -50%;
  left: -50%;
  background: radial-gradient(circle, rgba(139,69,19,0.05) 1px, transparent 1px);
  background-size: 30px 30px;
  animation: particleMove 20s linear infinite;
  pointer-events: none;
}

@keyframes particleMove {
  0% { transform: translate(0, 0); }
  100% { transform: translate(30px, 30px); }
}

/* 波浪背景 */
.wave-bg {
  position: relative;
}

.wave-bg::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 100px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 100'%3E%3Cpath fill='%23FAF6F0' d='M0,50 C360,100 720,0 1080,50 C1260,75 1380,60 1440,50 L1440,100 L0,100 Z'/%3E%3C/svg%3E") no-repeat bottom;
  background-size: cover;
}

/* ========================================
   滚动动画
   ======================================== */

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-60px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-left.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(60px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-right.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.8);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-scale.active {
  opacity: 1;
  transform: scale(1);
}

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

/* ========================================
   导航栏特效
   ======================================== */

.site-header {
  transition: var(--transition);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-md);
}

.nav-link {
  position: relative;
  transition: color 0.3s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 0.3s ease, left 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
  left: 0;
}

/* ========================================
   板块标题
   ======================================== */

.section-title {
  position: relative;
  display: inline-block;
  margin-bottom: 20px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
}

.section-title::before {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 4px;
  background: rgba(139, 69, 19, 0.1);
  border-radius: 2px;
}

/* ========================================
   数字计数动画
   ======================================== */

.counter {
  font-size: 48px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========================================
   标签/徽章
   ======================================== */

.premium-badge {
  display: inline-block;
  padding: 6px 16px;
  background: linear-gradient(135deg, rgba(139,69,19,0.1), rgba(201,169,110,0.1));
  color: var(--primary);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  border: 1px solid rgba(139, 69, 19, 0.2);
}

/* ========================================
   分割线
   ======================================== */

.premium-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 40px 0;
}

/* ========================================
   响应式优化
   ======================================== */

@media (max-width: 768px) {
  .counter { font-size: 32px; }
  .premium-btn { padding: 12px 28px; font-size: 14px; }
  .section-title { font-size: 24px !important; }
}

/* ========================================
   无障碍 - 减少动画
   ======================================== */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}