/* ========================================
   今年会·jinnianhui(中国)唯一官网 style.css
   Generated by AI Assistant
   ======================================== */

/* === CSS 变量 & 主题 === */
:root {
  --primary: #1a3a5c;
  --primary-light: #2a5a7c;
  --primary-dark: #0f2a40;
  --accent: #f0c040;
  --accent-dark: #d4a830;
  --bg-light: #f5f7fa;
  --bg-white: #ffffff;
  --text-dark: #333333;
  --text-muted: #555555;
  --text-light: #777777;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 50%;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.6s ease;
  --font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --glass-bg: rgba(255, 255, 255, 0.15);
  --glass-border: rgba(255, 255, 255, 0.25);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

/* 暗色模式变量 */
body.dark-mode {
  --primary: #0f2a40;
  --primary-light: #1a3a5c;
  --primary-dark: #0a1e2e;
  --bg-light: #1a1a2e;
  --bg-white: #16213e;
  --text-dark: #e0e0e0;
  --text-muted: #b0b0b0;
  --text-light: #888888;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
  --glass-bg: rgba(0, 0, 0, 0.3);
  --glass-border: rgba(255, 255, 255, 0.1);
}

/* === 全局重置 & 基础 === */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  color: var(--text-dark);
  background: var(--bg-light);
  line-height: 1.6;
  transition: background var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

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

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  padding-left: 1.5rem;
}

/* === 导航吸顶 === */
#header {
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  background: rgba(26, 58, 92, 0.95) !important;
  transition: background var(--transition-normal), box-shadow var(--transition-normal);
}

#header:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

/* 导航链接悬停效果 */
#header nav a {
  position: relative;
  padding: 4px 0;
}

#header nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-normal);
}

#header nav a:hover::after {
  width: 100%;
}

/* 搜索框 */
#header form {
  border: 1px solid transparent;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#header form:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(240, 192, 64, 0.2);
}

#header input::placeholder {
  color: #999;
}

/* 暗色模式按钮 */
#darkModeToggle {
  transition: background var(--transition-fast), transform var(--transition-fast);
}

#darkModeToggle:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: scale(1.05);
}

/* === Banner 轮播 === */
#bannerSlider > div {
  position: relative;
  padding: 2rem;
}

#bannerSlider h1,
#bannerSlider h2 {
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  animation: fadeInUp 0.8s ease;
}

#bannerSlider p {
  animation: fadeInUp 0.8s ease 0.2s both;
}

#bannerSlider a {
  animation: fadeInUp 0.8s ease 0.4s both;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

#bannerSlider a:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(240, 192, 64, 0.4);
}

/* 轮播圆点 */
.banner-dot {
  transition: background var(--transition-normal), transform var(--transition-fast);
  width: 14px !important;
  height: 14px !important;
  border: 2px solid rgba(255, 255, 255, 0.4);
}

.banner-dot:hover {
  transform: scale(1.2);
  border-color: #fff;
}

.banner-dot.active {
  background: var(--accent) !important;
  border-color: var(--accent);
}

/* === 面包屑 === */
nav[aria-label="breadcrumb"] a,
nav a[href="/"] {
  transition: color var(--transition-fast);
}

nav[aria-label="breadcrumb"] a:hover {
  color: var(--accent-dark);
}

/* === 通用 Section 样式 === */
section {
  padding: 3rem 1.5rem;
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

@media (min-width: 768px) {
  section {
    padding: 4rem 2rem;
  }
}

section h2 {
  position: relative;
  display: inline-block;
  margin-bottom: 1.5rem;
}

section h2::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 15px;
  width: 40px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}

/* === 品牌介绍 卡片 === */
#about > div > div {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  backdrop-filter: blur(4px);
  background: rgba(240, 244, 248, 0.8) !important;
}

#about > div > div:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

/* === 主营产品 卡片 === */
#products .grid > div {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  overflow: hidden;
}

#products .grid > div::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--primary-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

#products .grid > div:hover::before {
  transform: scaleX(1);
}

#products .grid > div:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

#products .grid svg {
  transition: transform var(--transition-normal);
}

#products .grid > div:hover svg {
  transform: scale(1.1) rotate(-5deg);
}

/* === 解决方案 卡片 === */
#solutions .grid > div {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  backdrop-filter: blur(4px);
  background: rgba(240, 244, 248, 0.7) !important;
}

#solutions .grid > div:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* === 客户案例 卡片 === */
#cases .grid > div {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
}

#cases .grid > div::after {
  content: '"';
  position: absolute;
  top: 8px;
  right: 16px;
  font-size: 3rem;
  color: var(--accent);
  opacity: 0.2;
  font-family: Georgia, serif;
}

#cases .grid > div:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

/* === 新闻中心 文章卡片 === */
#articles article {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  background: rgba(245, 247, 250, 0.8) !important;
  backdrop-filter: blur(4px);
}

#articles article:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

#articles article h3 {
  transition: color var(--transition-fast);
}

#articles article:hover h3 {
  color: var(--accent-dark);
}

#articles article a {
  font-weight: 600;
  position: relative;
}

#articles article a::after {
  content: ' →';
  opacity: 0;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

#articles article a:hover::after {
  opacity: 1;
  transform: translateX(4px);
}

/* === FAQ 部分 === */
.faq-item {
  transition: background var(--transition-fast);
  border-radius: var(--radius-sm);
  padding: 1rem 0.5rem !important;
}

.faq-item:hover {
  background: rgba(240, 244, 248, 0.5);
}

.faq-item h3 {
  transition: color var(--transition-fast);
}

.faq-item h3:hover {
  color: var(--accent-dark);
}

.faq-item p {
  padding: 0.75rem 0 0.25rem;
  line-height: 1.7;
}

/* === HowTo 部分 === */
#howto > div {
  backdrop-filter: blur(8px);
  background: rgba(245, 247, 250, 0.7) !important;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-normal);
}

#howto > div:hover {
  box-shadow: var(--shadow-md);
}

#howto h3 {
  margin-top: 1.5rem;
}

#howto h3:first-of-type {
  margin-top: 0;
}

/* === 联系我们 底部 === */
#contact {
  position: relative;
  overflow: hidden;
}

#contact::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(240, 192, 64, 0.08), transparent 60%);
  animation: rotate 20s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

#contact > div {
  position: relative;
  z-index: 1;
}

#contact a {
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

#contact a:hover {
  color: var(--accent) !important;
  padding-left: 4px;
}

/* === Footer === */
footer a {
  transition: color var(--transition-fast);
}

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

/* === 返回顶部按钮 === */
#backToTop {
  transition: opacity var(--transition-normal), transform var(--transition-normal), background var(--transition-fast);
  opacity: 0.85;
}

#backToTop:hover {
  opacity: 1;
  transform: scale(1.1);
  background: var(--accent) !important;
  color: var(--primary) !important;
}

/* === 滚动动画 === */
section.scroll-visible {
  opacity: 1 !important;
  transform: translateY(0) !important;
}

/* === 暗色模式适配 === */
body.dark-mode #header {
  background: rgba(15, 42, 64, 0.95) !important;
}

body.dark-mode #about > div > div {
  background: rgba(30, 40, 60, 0.8) !important;
}

body.dark-mode #products .grid > div {
  background: var(--bg-white);
  box-shadow: var(--shadow-sm);
}

body.dark-mode #solutions .grid > div {
  background: rgba(30, 40, 60, 0.7) !important;
}

body.dark-mode #cases .grid > div {
  background: var(--bg-white);
}

body.dark-mode #articles article {
  background: rgba(30, 40, 60, 0.8) !important;
}

body.dark-mode .faq-item:hover {
  background: rgba(255, 255, 255, 0.05);
}

body.dark-mode #howto > div {
  background: rgba(30, 40, 60, 0.7) !important;
}

body.dark-mode #contact {
  background: var(--primary-dark) !important;
}

body.dark-mode footer {
  background: #0a1e2e !important;
}

/* === 响应式设计 === */
@media (max-width: 768px) {
  #header {
    flex-wrap: wrap;
    height: auto !important;
    padding: 0.75rem 1rem !important;
  }

  #header > div:first-child {
    width: 100%;
    justify-content: center;
    margin-bottom: 0.5rem;
  }

  #header nav {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem !important;
    font-size: 13px !important;
  }

  #header nav a {
    font-size: 13px;
  }

  #header > div:last-child {
    width: 100%;
    justify-content: center;
    margin-top: 0.5rem;
  }

  #header form input {
    width: 100px !important;
  }

  /* Banner */
  #bannerSlider {
    height: 300px !important;
  }

  #bannerSlider h1 {
    font-size: 1.8rem !important;
  }

  #bannerSlider h2 {
    font-size: 1.5rem !important;
  }

  #bannerSlider p {
    font-size: 0.95rem !important;
    padding: 0 1rem;
  }

  /* Section padding */
  section {
    padding: 2rem 1rem !important;
  }

  section h2 {
    font-size: 1.5rem !important;
  }

  /* 网格布局 1列 */
  #products .grid,
  #solutions .grid,
  #cases .grid,
  #articles .grid {
    grid-template-columns: 1fr !important;
  }

  #about > div {
    flex-direction: column;
  }

  #contact > div {
    flex-direction: column;
    text-align: center;
  }

  #contact ul {
    padding: 0;
    list-style: none;
  }

  #contact ul li {
    margin: 0.25rem 0;
  }

  #backToTop {
    width: 40px !important;
    height: 40px !important;
    font-size: 18px !important;
    bottom: 20px !important;
    right: 20px !important;
  }
}

@media (max-width: 480px) {
  #header nav {
    gap: 0.5rem !important;
  }

  #header nav a {
    font-size: 12px !important;
  }

  #bannerSlider {
    height: 280px !important;
  }

  #bannerSlider h1 {
    font-size: 1.5rem !important;
  }

  #bannerSlider h2 {
    font-size: 1.3rem !important;
  }

  section h2 {
    font-size: 1.3rem !important;
  }

  .faq-item h3 {
    font-size: 0.95rem !important;
  }
}

/* === 动画关键帧 === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* === 毛玻璃效果通用类 === */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* === 工具类 === */
.text-accent { color: var(--accent); }
.bg-primary { background: var(--primary); }
.bg-accent { background: var(--accent); }
.rounded-card { border-radius: var(--radius-md); }
.shadow-hover { transition: box-shadow var(--transition-normal); }
.shadow-hover:hover { box-shadow: var(--shadow-md); }

/* === 打印样式 === */
@media print {
  #header,
  #backToTop,
  #darkModeToggle,
  #bannerSlider .banner-dot {
    display: none !important;
  }
  body {
    color: #000;
    background: #fff;
  }
  a {
    color: #000 !important;
    text-decoration: underline;
  }
}