/* ======================================== */
/* 众信互联科技有限公司 - 标准样式文件          */
/* 版本: 1.0.0                              */
/* 日期: 2023-12-12                         */
/* 基于设计标准文档实现                      */
/* ======================================== */

/* ---------------------------------------- */
/* 重置样式 - Reset Styles                   */
/* ---------------------------------------- */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-relaxed);
  color: var(--color-gray-600);
  background-color: var(--color-white);
  min-height: 1024px;
}

/* ---------------------------------------- */
/* 排版 - Typography                        */
/* ---------------------------------------- */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-4);
}

h1 {
  font-size: var(--font-size-h1);
  letter-spacing: var(--letter-spacing-tight);
}

h2 {
  font-size: var(--font-size-h2);
  letter-spacing: var(--letter-spacing-normal);
}

h3 {
  font-size: var(--font-size-h3);
  letter-spacing: var(--letter-spacing-wide);
}

h4 {
  font-size: var(--font-size-h4);
}

h5 {
  font-size: var(--font-size-h5);
}

h6 {
  font-size: var(--font-size-h6);
}

p {
  margin-bottom: var(--spacing-6);
}

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

a:hover {
  color: var(--color-primary-dark);
}

/* ---------------------------------------- */
/* 容器 - Container                          */
/* ---------------------------------------- */

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

/* ---------------------------------------- */
/* 导航栏 - Navigation                       */
/* ---------------------------------------- */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background-color: var(--color-white);
  backdrop-filter: blur(5px);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease-in-out;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-3) 0;
}

.navbar.scrolled {
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  padding: 0.5rem 0;
}

.navbar-brand {
  display: flex;
  align-items: center;
}

.navbar-brand img {
  height: 2.5rem;
}

.navbar-nav {
  display: flex;
  gap: var(--spacing-6);
}

.navbar-nav a {
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
  padding: var(--spacing-2) 0;
  position: relative;
  transition: var(--transition-property-color) var(--transition-fast);
}

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

.navbar-nav a:hover, .navbar-nav a.active {
  color: var(--color-primary);
}

.navbar-nav a:hover::after, .navbar-nav a.active::after {
  width: 100%;
}

.navbar-search {
  position: relative;
}

.navbar-search input {
  padding: var(--spacing-2) var(--spacing-4) var(--spacing-2) 2rem;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-small);
  transition: var(--transition-property-all) var(--transition-fast);
}

.navbar-search input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 64, 175, 0.1);
}

.navbar-search i {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-400);
  font-size: 0.875rem;
  z-index: 1;
}

.navbar-toggle {
  display: none;
  background: transparent !important;
  border: none;
  font-size: 1.5rem;
  color: var(--color-gray-700);
  cursor: pointer;
  padding: 0.5rem;
}

.navbar-toggle:hover {
  color: var(--color-primary);
  background: rgba(30, 64, 175, 0.05) !important;
  border-radius: 0.375rem;
}

/* 移动端菜单 */
.mobile-menu {
  display: none;
  background-color: var(--color-white);
  box-shadow: var(--shadow-lg);
  position: absolute;
  top: 9%;
  left: 0;
  right: 0;
  z-index: 49;
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.3s ease-in-out;
}

.mobile-menu.open {
  display: block;
  max-height: 500px;
}

.mobile-menu-nav {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  padding: var(--spacing-4) 0;
}

.mobile-menu-nav a {
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
  padding: var(--spacing-2) 0;
  border-bottom: 1px solid var(--color-gray-100);
  transition: var(--transition-property-color) var(--transition-fast);
}

.mobile-menu-nav a:last-child {
  border-bottom: none;
}

.mobile-menu-nav a:hover, .mobile-menu-nav a.active {
  color: var(--color-primary);
}

.mobile-menu-search {
  margin-top: var(--spacing-4);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .navbar-nav {
    display: none;
  }
  
  .navbar-search {
    display: none;
  }
  
  .navbar-toggle {
    display: block;
  }
  
  .mobile-menu {
    display: block;
  }
}

/* ---------------------------------------- */
/* 轮播图 - Carousel                         */
/* ---------------------------------------- */

.carousel {
  position: relative;
  height: var(--carousel-height);
  overflow: hidden;
}

.carousel-item {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: var(--transition-property-opacity) var(--transition-normal);
}

.carousel-item.active {
  opacity: 1;
}

.carousel-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.carousel-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0, 0, 0, 0.7), transparent);
}

.carousel-content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 var(--container-padding);
}

.carousel-content h1 {
  font-size: 2.25rem;
  color: var(--color-white);
  margin-bottom: var(--spacing-4);
  max-width: 48rem;
}

.carousel-content p {
  font-size: 1.125rem;
  color: var(--color-white);
  margin-bottom: var(--spacing-8);
  max-width: 32rem;
}

.carousel-indicators {
  position: absolute;
  bottom: var(--spacing-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--spacing-2);
}

.carousel-indicators button {
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background-color: var(--color-white);
  opacity: 0.5;
  border: none;
  cursor: pointer;
  transition: var(--transition-property-opacity) var(--transition-fast);
}

.carousel-indicators button.active {
  opacity: 1;
}

/* ---------------------------------------- */
/* 卡片 - Cards                              */
/* ---------------------------------------- */

.card {
  background-color: var(--color-white);
  padding: var(--card-padding);
  border-radius: var(--card-border-radius);
  box-shadow: var(--card-shadow);
  transition: var(--transition-property-all) var(--transition-normal);
}

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

/* 价值卡片 */
.value-card {
  text-align: center;
}

.value-card .icon-wrapper {
  width: var(--value-card-icon-size);
  height: var(--value-card-icon-size);
  background-color: var(--color-blue-50);
  color: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto var(--spacing-4);
}

.value-card h3 {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-2);
}

.value-card p {
  font-size: var(--font-size-small);
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-3);
}

.value-card .badge {
  display: inline-block;
  background-color: var(--color-blue-50);
  color: var(--color-primary);
  font-size: var(--font-size-xs);
  padding: 0.25rem 0.75rem;
  border-radius: var(--border-radius-full);
}

/* 产品卡片 */
.product-card {
  overflow: hidden;
}

.product-card .product-image {
  height: var(--product-card-image-height);
  overflow: hidden;
}

.product-card .product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
  transition: var(--transition-property-transform) var(--transition-normal);
}

.product-card:hover .product-image img {
  transform: scale(1.05);
}

.product-card .product-info {
  padding: var(--spacing-6);
}

.product-card h3 {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-3);
}

.product-card p {
  font-size: var(--font-size-small);
  color: var(--color-gray-600);
  margin-bottom: var(--spacing-4);
}

.product-card .product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-4);
}

.product-card .product-tags span {
  font-size: var(--font-size-xs);
  padding: 0.25rem 0.5rem;
  border-radius: var(--border-radius-full);
  background-color: var(--color-blue-50);
  color: var(--color-primary);
}

/* ---------------------------------------- */
/* 按钮 - Buttons                           */
/* ---------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3) var(--spacing-8);
  font-size: var(--btn-font-size);
  font-weight: var(--font-weight-medium);
  border-radius: var(--border-radius-lg);
  cursor: pointer;
  transition: var(--transition-property-all) var(--transition-fast);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--color-white);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

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

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

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

.btn-outline-white {
  background-color: transparent;
  color: var(--color-white);
  border: 1px solid var(--color-white);
}

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

/* ---------------------------------------- */
/* 子栏目导航 - Sub Navigation               */
/* ---------------------------------------- */

.sub-nav {
  border-bottom: 1px solid var(--color-gray-200);
  margin-bottom: var(--spacing-8);
}

.sub-nav ul {
  display: flex;
  gap: var(--spacing-2);
}

.sub-nav a {
  display: inline-block;
  padding: var(--spacing-4) var(--spacing-2);
  border-bottom: 2px solid transparent;
  color: var(--color-gray-600);
  font-weight: var(--font-weight-medium);
  transition: var(--transition-property-all) var(--transition-fast);
}

.sub-nav a:hover,
.sub-nav a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* ---------------------------------------- */
/* 页脚 - Footer                             */
/* ---------------------------------------- */

.footer {
  background-color: var(--color-gray-900);
  color: var(--color-white);
  padding-top: var(--spacing-16);
  padding-bottom: var(--spacing-8);
}

.footer-content {
  display: grid;
  gap: var(--spacing-12);
  margin-bottom: var(--spacing-12);
}

.footer-section h4 {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
  margin-bottom: var(--spacing-4);
}

.footer-section p {
  color: var(--color-gray-400);
  font-size: var(--font-size-small);
  line-height: 1.6;
  margin-bottom: var(--spacing-6);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-3);
}

.footer-section ul li a {
  color: var(--color-gray-400);
  text-decoration: none;
  font-size: var(--font-size-small);
  transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
  color: var(--color-white);
}

.footer-section ul li.contact-item {
  display: flex;
  align-items: flex-start;
  color: var(--color-gray-400);
  font-size: var(--font-size-small);
}

.footer-section ul li.contact-item i {
  margin-right: var(--spacing-3);
  color: var(--color-gray-500);
  margin-top: var(--spacing-1);
  width: 1rem;
  text-align: center;
}

.footer-social {
  display: flex;
  gap: var(--spacing-4);
  margin-bottom: var(--spacing-4);
}

.footer-social a {
  width: 2.5rem;
  height: 2.5rem;
  background-color: var(--color-gray-800);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--color-white);
  transition: background-color var(--transition-fast);
}

.footer-social a:hover {
  background-color: var(--color-primary);
}

.footer-copyright {
  border-top: 1px solid var(--color-gray-800);
  padding-top: var(--spacing-8);
  color: var(--color-gray-500);
  font-size: var(--font-size-small);
}

.footer-copyright-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-4);
}

.footer-copyright-links {
  display: flex;
  gap: var(--spacing-6);
}

.footer-copyright-links a {
  color: var(--color-gray-500);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-copyright-links a:hover {
  color: var(--color-gray-300);
}

/* 响应式页脚布局 */
@media (max-width: var(--breakpoint-tablet)) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
  }
  
  .footer-copyright-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-4);
  }
}

@media (min-width: var(--breakpoint-tablet)) and (max-width: var(--breakpoint-desktop) - 1px) {
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-12);
  }
}

@media (min-width: var(--breakpoint-desktop)) {
  .footer-content {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-16);
  }
  
  .footer-copyright-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  
  .footer-copyright-links {
    gap: var(--spacing-6);
  }
}

/* 自定义样式 - Custom Styles               */
/* ---------------------------------------- */

.font-logo {
  font-family: "Helvetica Neue", sans-serif;
}

.icon-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* 横幅样式 */
.banner-section {
  height: 600px;
  background-size: cover;
  background-position: center;
}

/* 移动端Banner优化 */
@media (max-width: 768px) {
  .banner-section {
    height: var(--carousel-height-mobile);
  }
  
  .banner-section h1 {
    font-size: 2rem;
    line-height: 1.2;
  }
  
  .banner-section p {
    font-size: 1rem;
    margin-bottom: 1rem;
  }
  
  .banner-section button {
    padding: 0.5rem 1.5rem;
    font-size: 0.875rem;
  }
}

.news-item {
  border-bottom: 1px solid var(--color-gray-200);
}

/* 卡片悬停效果增强 */
.service-card {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-card:hover {
  transform: translateY(-3px);
}

.client-logo {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------------------------------------- */
/* 响应式设计 - Responsive Design           */
/* ---------------------------------------- */

@media (min-width: var(--breakpoint-tablet)) and (max-width: var(--breakpoint-desktop) - 1px) {
  /* 页脚 - 平板设备优化 */
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-12);
  }
}

@media (min-width: var(--breakpoint-desktop)) {
  /* 页脚 - 桌面设备优化 */
  .navbar-nav {
    display: flex;
  }
  
  .navbar-search {
    display: block;
  }
  
  .navbar-toggle {
    display: none;
  }
  
  /* 轮播图 */
  .carousel-content h1 {
    font-size: 3.5rem;
  }
  
  .footer-content {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-16);
  }
  
  .footer-section {
    margin-bottom: 0;
  }
  
  .footer-copyright {
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
  }
  
  .footer-copyright > div {
    margin-bottom: 0;
  }
}

@media (max-width: var(--breakpoint-tablet)) {
  /* 容器 */
  .container {
    padding: 0 var(--spacing-4);
  }
  
  /* 导航栏 */
  .navbar-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    padding: var(--spacing-4);
    flex-direction: column;
    gap: var(--spacing-2);
    box-shadow: var(--shadow-md);
  }
  
  .navbar-nav.active {
    display: flex;
  }
  
  .navbar-toggle {
    display: block;
  }
  
  /* 轮播图 */
  .carousel {
    height: var(--carousel-height-mobile);
  }
  
  .carousel-content h1 {
    font-size: 2rem;
  }
  
  .carousel-content p {
    font-size: 1rem;
  }
  
  /* 卡片 */
  .value-card .icon-wrapper {
    width: var(--value-card-icon-size-mobile);
    height: var(--value-card-icon-size-mobile);
    font-size: 1.5rem;
  }
  
  /* 产品卡片 */
  .product-card .product-image {
    height: var(--product-card-image-height-mobile);
  }
  
  /* 页脚 - 平板和移动设备优化 */
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
  }
  
  .footer-section {
    margin-bottom: 0;
  }
  
  .footer-copyright {
    flex-direction: column;
    gap: var(--spacing-4);
    text-align: center;
  }
  
  .footer-copyright > div {
    margin-bottom: 0;
  }
}

@media (max-width: var(--breakpoint-mobile)) {
  /* 轮播图 */
  .carousel-content h1 {
    font-size: 1.75rem;
  }
  
  .carousel-content p {
    font-size: 0.875rem;
  }
}