/* Modern UI for Picture Frame Machine Website */

:root {
  /* 全新的配色方案 - 专业、现代的蓝色调 */
  --primary-color: #0056b3;
  --secondary-color: #00356f;
  --accent-color: #ff6b00;
  --text-dark: #212529;
  --text-light: #6c757d;
  --background-light: #f8f9fa;
  --background-dark: #1a2c42;
  --white: #ffffff;
  
  /* 更专业的排版 */
  --font-heading: 'Roboto', sans-serif;
  --font-body: 'Open Sans', sans-serif;
  --font-size-base: 16px;
  --font-size-h1: 2.5rem;
  --font-size-h2: 2rem;
  --font-size-h3: 1.5rem;
  --font-size-h4: 1.25rem;
  
  /* 间距系统 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
  
  /* 圆角 */
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 16px;
  
  /* 阴影效果 */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
  
  /* 过渡动画 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* 容器宽度 */
  --container-width: 1400px;
}

/* 全局重置和基础样式 */
body {
  font-family: var(--font-body);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
  background-color: var(--white);
  font-size: var(--font-size-base);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-dark);
  line-height: 1.2;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-color);
}

.btn {
  display: inline-block;
  background: var(--primary-color);
  color: var(--white);
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-md);
  font-weight: 600;
  transition: all var(--transition-normal);
  border: none;
  cursor: pointer;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.9rem;
}

.btn:hover {
  background: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-accent {
  background: var(--accent-color);
}

.btn-accent:hover {
  background: #e65c00;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
}

.btn-outline:hover {
  background: var(--primary-color);
  color: var(--white);
}

.l-wrap {
  width: 100%;
  max-width: var(--container-width);
  padding: 0 var(--spacing-lg);
  margin: 0 auto;
}

/* 头部样式改进 */
header {
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: background var(--transition-normal);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-sm);
}

.head-info {
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  background: var(--background-light);
  max-height: 80px;
  min-height: 70px;
}

.head-logo img {
  max-height: 50px;
  transition: all var(--transition-fast);
}

.head-list {
  display: flex;
  align-items: center;
}

.head-list .item {
  display: flex;
  align-items: center;
  margin-right: var(--spacing-md);
}

.head-list .item .icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-color);
  margin-right: var(--spacing-xs);
}

.head-list .item .icon em {
  color: var(--white);
  font-size: 18px;
}

.head-list .item .info span {
  display: block;
  font-size: 12px;
  color: var(--text-light);
  font-weight: 600;
  text-transform: uppercase;
}

.head-list .item .info p {
  font-weight: 600;
  color: var(--text-dark);
}

.head-share ul {
  display: flex;
  align-items: center;
}

.head-share ul li a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.05);
  margin-left: 8px;
  color: var(--primary-color);
  transition: all var(--transition-fast);
}

.head-share ul li a:hover {
  background: var(--primary-color);
  color: var(--white);
  transform: translateY(-3px);
}

/* 导航栏改进 */
.head-nav {
  padding: var(--spacing-sm) 0;
  background: var(--white);
  box-shadow: none;
  border-radius: 0;
  position: relative;
  bottom: auto;
  left: auto;
  transform: none;
  animation: none;
}

.nav-ul {
  display: flex;
  align-items: center;
}

.nav-ul > li {
  position: relative;
  padding: 0 var(--spacing-sm);
}

.nav-ul > li > a {
  display: flex;
  align-items: center;
  padding: var(--spacing-xs) 0;
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-dark);
  position: relative;
}

.nav-ul > li > a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width var(--transition-normal);
}

.nav-ul > li:hover > a::after,
.nav-ul > li > a.inmenu_1::after {
  width: 100%;
}

.nav-ul > li:hover > a,
.nav-ul > li > a.inmenu_1 {
  color: var(--primary-color);
}

.nav-ul > li .submenu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--white);
  box-shadow: var(--shadow-md);
  border-radius: var(--border-radius-sm);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-normal);
  overflow: hidden;
  z-index: 100;
}

.nav-ul > li:hover .submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-ul > li .submenu a {
  display: block;
  padding: var(--spacing-sm);
  color: var(--text-dark);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: all var(--transition-fast);
}

.nav-ul > li .submenu a:hover {
  background: rgba(0, 86, 179, 0.05);
  color: var(--primary-color);
  padding-left: calc(var(--spacing-sm) + 5px);
}

.search-box {
  position: relative;
}

.head-search button {
  background: none;
  border: none;
  padding: var(--spacing-xs);
  cursor: pointer;
}

.head-search button em {
  font-size: 22px;
  color: var(--primary-color);
}

.search-input {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--white);
  display: flex;
  box-shadow: var(--shadow-md);
  border-radius: var(--border-radius-sm);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-normal);
}

.search-input.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.search-input input {
  width: 240px;
  height: 48px;
  padding: 0 var(--spacing-sm);
  border: none;
  background: transparent;
  outline: none;
  font-size: 1rem;
}

.search-input .search-btn {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-color);
  border-top-right-radius: var(--border-radius-sm);
  border-bottom-right-radius: var(--border-radius-sm);
}

.search-input .search-btn em {
  color: var(--white);
}

/* 轮播图样式改进 */
.home-banner {
  margin-top: 140px;
  position: relative;
  overflow: hidden;
}

.swiper-slide {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

.swiper-slide img {
  width: 100%;
  display: block;
  transition: transform 0.8s ease;
}

.swiper-slide:hover img {
  transform: scale(1.05);
}

.banner-animote {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-lg);
  background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
  color: var(--white);
}

.banner-animote .title {
  font-size: var(--font-size-h2);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.6s ease 0.3s;
}

.banner-animote .text {
  font-size: 1.1rem;
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.6s ease 0.5s;
}

.swiper-slide-active .banner-animote .title,
.swiper-slide-active .banner-animote .text {
  transform: translateY(0);
  opacity: 1;
}

.banner-button-prev,
.banner-button-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  transition: all var(--transition-fast);
}

.banner-button-prev:hover,
.banner-button-next:hover {
  background: rgba(255, 255, 255, 0.6);
}

.banner-button-prev {
  left: 20px;
}

.banner-button-next {
  right: 20px;
}

.banner-button-prev em,
.banner-button-next em {
  font-size: 24px;
  color: var(--white);
}

.swiper-pagination {
  position: absolute;
  bottom: 20px;
  left: 0;
  right: 0;
  text-align: center;
}

.swiper-pagination span {
  width: 12px;
  height: 12px;
  background: rgba(255, 255, 255, 0.5);
  margin: 0 4px;
}

.swiper-pagination-bullet-active {
  background: var(--white) !important;
}

/* 产品分类导航区域样式改进 */
.category-navigation {
  padding: var(--spacing-xl) 0;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.category-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.category-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.category-content {
  position: relative;
  padding: var(--spacing-md);
  background: var(--background-light);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 180px;
  text-align: center;
}

.category-name {
  font-size: var(--font-size-h4);
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--spacing-sm);
}

.category-btn {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1.2rem;
  border: 2px solid var(--primary-color);
  border-radius: 50px;
  color: var(--primary-color);
  font-weight: 600;
  transition: all var(--transition-normal);
}

.category-btn .btn-icon {
  margin-left: 8px;
  transition: transform var(--transition-normal);
}

.category-btn:hover {
  background: var(--primary-color);
  color: var(--white);
}

.category-btn:hover .btn-icon {
  transform: rotate(180deg);
}

/* 媒体查询 */
@media (max-width: 1200px) {
  :root {
    --font-size-h1: 2.2rem;
    --font-size-h2: 1.8rem;
  }
  
  .l-wrap {
    padding: 0 var(--spacing-md);
  }
  
  .head-list {
    margin: 0 var(--spacing-sm);
  }
}

@media (max-width: 992px) {
  .head-list .item .info p {
    font-size: 14px;
  }
  
  .home-banner {
    margin-top: 120px;
  }
  
  .banner-animote {
    padding: var(--spacing-md);
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-h1: 1.8rem;
    --font-size-h2: 1.5rem;
    --font-size-h3: 1.3rem;
  }
  
  .head-info {
    padding: var(--spacing-xs) 0;
  }
  
  .head-list {
    display: none;
  }
  
  .m-menu {
    display: block;
  }
  
  .head-logo img {
    max-height: 50px;
  }
  
  .head-share {
    margin-left: auto;
  }
  
  .home-banner {
    margin-top: 100px;
  }
  
  .banner-animote .title {
    font-size: var(--font-size-h3);
  }
  
  .banner-animote .text {
    font-size: 0.9rem;
  }
  
  .category-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }
}

@media (max-width: 576px) {
  .l-wrap {
    padding: 0 var(--spacing-sm);
  }
  
  .head-share ul li a {
    width: 32px;
    height: 32px;
  }
  
  .banner-button-prev,
  .banner-button-next {
    width: 40px;
    height: 40px;
  }
  
  .banner-animote {
    padding: var(--spacing-sm);
  }
}