/* ===== 今年会·jinnianhui 品牌官网 - 完整样式表 ===== */
/* 版本: 1.0 | 更新: 2025-06-20 */

/* 全局重置与CSS变量 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #1a2a6c;
  --primary-light: #2a4a8c;
  --primary-dark: #0f1a3e;
  --accent: #e8b84b;
  --accent-light: #f0d06a;
  --bg: #f8f9fc;
  --bg-card: rgba(255,255,255,0.7);
  --text: #1a1a2e;
  --text-light: #555;
  --glass: rgba(255,255,255,0.25);
  --shadow: 0 8px 32px rgba(0,0,0,0.1);
  --radius: 20px;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --gradient-hero: linear-gradient(135deg, #0f1a3e 0%, #1a2a6c 50%, #2a4a8c 100%);
  --gradient-stats: linear-gradient(135deg, #0f1a3e, #1a2a6c);
  --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-serif: 'Georgia', 'Times New Roman', serif;
}

/* 暗色模式 */
[data-theme="dark"] {
  --primary: #2a4a8c;
  --primary-light: #4a6aac;
  --primary-dark: #1a2a6c;
  --accent: #f0d06a;
  --accent-light: #f8e08a;
  --bg: #0f1a2e;
  --bg-card: rgba(30,40,70,0.8);
  --text: #e8e8f0;
  --text-light: #aab;
  --glass: rgba(0,0,0,0.3);
  --shadow: 0 8px 32px rgba(0,0,0,0.5);
  --gradient-hero: linear-gradient(135deg, #0f1a3e 0%, #1a2a6c 50%, #2a4a8c 100%);
  --gradient-stats: linear-gradient(135deg, #0f1a3e, #1a2a6c);
}

/* 基础样式 */
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
  min-height: 100vh;
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 通用章节 */
section {
  padding: 80px 0;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 16px;
  text-align: center;
  color: var(--primary);
  letter-spacing: -0.5px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-light);
  max-width: 700px;
  margin: 0 auto 48px;
  font-size: 1.05rem;
  line-height: 1.6;
}

/* 网格布局 */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* 卡片组件 */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,0.2);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--primary-light));
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover::before {
  opacity: 1;
}

/* 毛玻璃按钮 */
.glass-btn {
  background: var(--glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.3);
  padding: 12px 28px;
  border-radius: 50px;
  color: var(--text);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 1rem;
  display: inline-block;
  text-align: center;
}

.glass-btn:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(26,42,108,0.3);
}

/* ===== 导航栏 ===== */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  transition: background var(--transition);
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

/* Logo */
.logo {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  letter-spacing: 1px;
  transition: color var(--transition);
}

.logo span {
  color: var(--accent);
  font-family: var(--font-serif);
}

.logo:hover {
  color: var(--primary-light);
}

/* 导航链接 */
.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.nav-links li {
  position: relative;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 6px 0;
  position: relative;
  transition: color var(--transition);
}

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

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

.nav-links a:hover {
  color: var(--primary);
}

.nav-links a.active {
  color: var(--primary);
  font-weight: 600;
}

/* 导航操作按钮 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.search-btn,
.theme-btn,
.menu-btn {
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 6px;
  border-radius: 8px;
  transition: background var(--transition), transform var(--transition);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-btn:hover,
.theme-btn:hover,
.menu-btn:hover {
  background: var(--glass);
  transform: scale(1.1);
}

.menu-btn {
  display: none;
}

/* ===== 搜索覆盖层 ===== */
.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.3s ease;
}

.search-overlay.active {
  display: flex;
}

.search-box {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 32px;
  border-radius: var(--radius);
  width: 90%;
  max-width: 500px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,0.2);
  animation: slideUp 0.4s ease;
}

.search-box input {
  width: 100%;
  padding: 14px 20px;
  border: 2px solid var(--primary-light);
  border-radius: 12px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border-color var(--transition);
}

.search-box input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(232,184,75,0.2);
}

.search-box input::placeholder {
  color: var(--text-light);
  opacity: 0.7;
}

.search-close {
  margin-top: 16px;
  text-align: right;
}

.search-close button {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 8px 20px;
  border-radius: 8px;
  cursor: pointer;
  transition: background var(--transition);
}

.search-close button:hover {
  background: var(--primary-light);
}

/* ===== 移动菜单 ===== */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  z-index: 1500;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 24px;
  animation: fadeIn 0.3s ease;
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu a {
  font-size: 1.3rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  padding: 8px 24px;
  border-radius: 12px;
  transition: background var(--transition), color var(--transition);
}

.mobile-menu a:hover {
  background: var(--glass);
  color: var(--primary);
}

.mobile-menu .close-btn {
  position: absolute;
  top: 24px;
  right: 24px;
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--text);
  cursor: pointer;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background var(--transition);
}

.mobile-menu .close-btn:hover {
  background: var(--glass);
}

/* ===== Hero Banner ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: var(--gradient-hero);
  padding: 120px 0 80px;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero h1 span {
  color: var(--accent);
  font-family: var(--font-serif);
}

.hero p {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.85);
  max-width: 600px;
  margin-bottom: 32px;
  line-height: 1.8;
}

.hero .glass-btn {
  color: #fff;
  border-color: rgba(255,255,255,0.4);
  background: rgba(255,255,255,0.1);
}

.hero .glass-btn:hover {
  background: var(--accent);
  color: var(--primary-dark);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(232,184,75,0.4);
}

/* Hero SVG装饰 */
.hero-svg {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 45%;
  height: auto;
  opacity: 0.15;
  pointer-events: none;
}

/* Banner指示器 */
.banner-indicators {
  display: flex;
  gap: 8px;
  margin-top: 32px;
}

.banner-indicators button {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.5);
  background: transparent;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

.banner-indicators button.active {
  background: var(--accent);
  border-color: var(--accent);
  transform: scale(1.2);
}

.banner-indicators button:hover {
  background: rgba(255,255,255,0.3);
}

/* ===== SVG插画 ===== */
.svg-illustration {
  width: 100%;
  max-width: 400px;
  height: auto;
  display: block;
  margin: 0 auto;
  transition: transform var(--transition);
}

.svg-illustration:hover {
  transform: scale(1.02);
}

/* ===== 数字统计 ===== */
.stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.stat-label {
  color: var(--text-light);
  margin-top: 4px;
  font-size: 0.95rem;
}

/* ===== FAQ ===== */
.faq-item {
  border-bottom: 1px solid rgba(0,0,0,0.1);
  padding: 16px 0;
  cursor: pointer;
  transition: background var(--transition);
}

.faq-item:hover {
  background: rgba(0,0,0,0.02);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease, padding 0.3s ease;
  padding-top: 0;
  color: var(--text-light);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-top: 12px;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-icon {
  transition: transform 0.3s ease;
  font-size: 0.8rem;
  color: var(--primary);
}

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  box-shadow: var(--shadow);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 999;
  transition: background var(--transition), transform var(--transition);
}

.back-to-top.show {
  display: flex;
  animation: fadeInUp 0.4s ease;
}

.back-to-top:hover {
  background: var(--primary-light);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(26,42,108,0.3);
}

/* ===== Footer ===== */
footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.8);
  padding: 48px 0 24px;
}

footer a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  transition: color var(--transition);
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
}

.footer-grid h4,
.footer-grid h5 {
  color: #fff;
  margin-bottom: 8px;
}

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

.footer-grid ul li {
  margin-bottom: 6px;
}

.footer-grid ul li a {
  font-size: 0.9rem;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  margin-top: 32px;
  text-align: center;
  font-size: 0.9rem;
}

.footer-bottom p {
  margin-bottom: 4px;
  opacity: 0.9;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  background: var(--glass);
  padding: 12px 24px;
  border-radius: 12px;
  margin-bottom: 24px;
  font-size: 0.9rem;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

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

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

.breadcrumb span {
  color: var(--text-light);
}

/* ===== 滚动动画 ===== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 新闻文章 ===== */
article.card time {
  display: block;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 8px;
}

article.card h3 {
  margin-bottom: 8px;
  color: var(--primary);
}

article.card a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
}

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

/* ===== 客户评价卡片 ===== */
.card p:last-child {
  margin-top: 12px;
  font-weight: 600;
  color: var(--primary);
}

/* ===== 友情链接 & 网站地图 ===== */
section a[href] {
  transition: color var(--transition);
}

section a[href]:hover {
  color: var(--primary) !important;
}

/* ===== 动画关键帧 ===== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

/* ===== 响应式设计 ===== */

/* 平板及以下 */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
}

/* 手机端 */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .menu-btn {
    display: flex;
  }
  
  .hero {
    padding: 100px 0 60px;
  }
  
  .hero h1 {
    font-size: 2.2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .hero-svg {
    display: none;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  section {
    padding: 48px 0;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .section-subtitle {
    font-size: 0.95rem;
    margin-bottom: 32px;
  }
  
  .card {
    padding: 24px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  
  .stat-number {
    font-size: 2.2rem;
  }
  
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
  }
  
  .search-box {
    padding: 24px;
  }
  
  .breadcrumb {
    padding: 10px 16px;
    font-size: 0.85rem;
  }
  
  .banner-indicators {
    margin-top: 24px;
  }
}

/* 小屏手机 */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .hero p {
    font-size: 0.95rem;
  }
  
  .stat-number {
    font-size: 2rem;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .nav-links {
    gap: 16px;
  }
  
  nav {
    padding: 10px 16px;
  }
  
  .logo {
    font-size: 1.3rem;
  }
  
  .card {
    padding: 20px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-bottom {
    font-size: 0.8rem;
  }
  
  .mobile-menu a {
    font-size: 1.1rem;
  }
}

/* ===== 暗色模式适配 ===== */
[data-theme="dark"] .card {
  border-color: rgba(255,255,255,0.08);
}

[data-theme="dark"] .card:hover {
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}

[data-theme="dark"] .faq-item {
  border-color: rgba(255,255,255,0.08);
}

[data-theme="dark"] .faq-item:hover {
  background: rgba(255,255,255,0.02);
}

[data-theme="dark"] .breadcrumb {
  background: rgba(0,0,0,0.3);
}

[data-theme="dark"] .search-box {
  border-color: rgba(255,255,255,0.1);
}

[data-theme="dark"] .hero .glass-btn {
  border-color: rgba(255,255,255,0.2);
}

[data-theme="dark"] .hero .glass-btn:hover {
  background: var(--accent);
  color: var(--primary-dark);
}

/* ===== 打印样式 ===== */
@media print {
  header,
  .back-to-top,
  .search-overlay,
  .mobile-menu,
  .banner-indicators {
    display: none !important;
  }
  
  .hero {
    min-height: auto;
    padding: 40px 0;
    background: #fff !important;
    color: #000 !important;
  }
  
  .hero h1,
  .hero p {
    color: #000 !important;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
  }
  
  section {
    padding: 24px 0;
  }
}

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

/* 焦点样式 */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* 选择文本样式 */
::selection {
  background: var(--accent);
  color: var(--primary-dark);
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-light);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}