/* ===== 熊猫体育 PANDA SPORTS 完整样式表 ===== */
/* 主题变量 */
:root {
  --primary: #ff6b35;
  --primary-dark: #e55a2b;
  --secondary: #f7c59f;
  --accent: #667eea;
  --dark: #1a1a2e;
  --darker: #0f0c29;
  --light: #f8f9fa;
  --glass: rgba(255, 255, 255, 0.15);
  --glass-dark: rgba(15, 12, 41, 0.8);
  --glass-hover: rgba(255, 255, 255, 0.25);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.2);
  --shadow-btn: 0 4px 15px rgba(255, 107, 53, 0.4);
  --shadow-btn-hover: 0 8px 25px rgba(255, 107, 53, 0.5);
  --radius: 20px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --radius-round: 50px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1200px;
  --header-height: 70px;
}

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

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

body {
  font-family: var(--font);
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #333;
  line-height: 1.6;
  min-height: 100vh;
  transition: background 0.5s ease, color 0.3s ease;
  overflow-x: hidden;
}

body.dark {
  background: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
  color: #e0e0e0;
}

/* ===== 容器 ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  width: 100%;
}

/* ===== 通用文本 ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
}

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

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

ul {
  list-style: none;
}

/* ===== 头部导航 ===== */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  transition: var(--transition);
  height: var(--header-height);
}

body.dark header {
  background: var(--glass-dark);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  max-width: var(--max-width);
  margin: 0 auto;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo svg {
  width: 40px;
  height: 40px;
  transition: var(--transition);
}

.logo:hover svg {
  transform: scale(1.05) rotate(-5deg);
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #ff6b35, #f7c59f);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
}

/* 导航 */
nav ul {
  display: flex;
  list-style: none;
  gap: 25px;
  align-items: center;
}

nav a {
  text-decoration: none;
  color: #fff;
  font-weight: 500;
  font-size: 0.95rem;
  padding: 5px 0;
  position: relative;
  transition: var(--transition);
  white-space: nowrap;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
  border-radius: 1px;
}

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

body.dark nav a {
  color: #ccc;
}

body.dark nav a:hover {
  color: #fff;
}

/* 暗黑模式切换按钮 */
.dark-toggle {
  background: none;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #fff;
  font-size: 1.2rem;
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 15px;
}

.dark-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: scale(1.1);
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
  padding: 5px;
  flex-shrink: 0;
  margin-left: 10px;
}

.menu-toggle span {
  width: 28px;
  height: 3px;
  background: #fff;
  border-radius: 5px;
  transition: var(--transition);
}

body.dark .menu-toggle span {
  background: #ccc;
}

.menu-toggle:hover span {
  background: var(--primary);
}

/* ===== Hero 区域 ===== */
.hero {
  margin-top: var(--header-height);
  position: relative;
  overflow: hidden;
  padding: 80px 0;
  background: rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(5px);
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(255, 107, 53, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 70% 50%, rgba(247, 197, 159, 0.1) 0%, transparent 50%);
  animation: heroGlow 10s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(2%, 2%) rotate(3deg); }
}

.hero-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 40px;
  position: relative;
  z-index: 1;
}

.hero-text {
  flex: 1;
  min-width: 280px;
}

.hero-text h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 20px;
  line-height: 1.2;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero-text p {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 30px;
  max-width: 500px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.btn {
  padding: 14px 32px;
  border-radius: var(--radius-round);
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: inline-block;
  font-size: 1rem;
  text-align: center;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-btn-hover);
  background: var(--primary-dark);
}

.btn-outline {
  background: transparent;
  border: 2px solid #fff;
  color: #fff;
}

.btn-outline:hover {
  background: #fff;
  color: #333;
  transform: translateY(-3px);
}

.hero-image {
  flex: 1;
  min-width: 280px;
  text-align: center;
}

.hero-image svg {
  width: 100%;
  max-width: 500px;
  height: auto;
  filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-20px); }
}

/* ===== Banner 轮播 ===== */
.banner-slider {
  position: relative;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius);
  margin: 40px 0;
}

.banner-slide {
  display: none;
  padding: 60px 40px;
  background: var(--glass);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  text-align: center;
  color: #fff;
  min-height: 200px;
  display: none;
}

.banner-slide.active {
  display: block;
  animation: fadeIn 0.5s ease;
}

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

.banner-slide h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 15px;
  font-weight: 700;
}

.banner-slide p {
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

.banner-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 20px;
}

.banner-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: var(--transition);
}

.banner-dots span.active {
  background: var(--primary);
  transform: scale(1.2);
  box-shadow: 0 0 10px rgba(255, 107, 53, 0.5);
}

.banner-dots span:hover {
  background: rgba(255, 255, 255, 0.7);
}

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  gap: 10px;
  list-style: none;
  padding: 15px 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  flex-wrap: wrap;
}

.breadcrumb li a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: var(--transition);
}

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

.breadcrumb li + li::before {
  content: '/';
  margin-right: 10px;
  color: rgba(255, 255, 255, 0.4);
}

/* ===== 通用区块样式 ===== */
section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  font-size: clamp(1.8rem, 4vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 50px;
  color: #fff;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: var(--primary);
  margin: 15px auto 0;
  border-radius: 2px;
  transition: var(--transition);
}

body.dark .section-title {
  color: #e0e0e0;
}

/* ===== 卡片 ===== */
.card {
  background: var(--glass);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #fff;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 255, 255, 0.2);
  background: var(--glass-hover);
}

body.dark .card {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.05);
}

body.dark .card:hover {
  background: rgba(255, 255, 255, 0.08);
}

/* ===== 网格布局 ===== */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 30px;
}

/* ===== 关于我们 ===== */
.about-content {
  max-width: 800px;
  margin: 0 auto;
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.05rem;
  line-height: 1.8;
}

.about-content p {
  margin-bottom: 20px;
}

body.dark .about-content {
  color: #bbb;
}

/* ===== 时间线 ===== */
.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--primary);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
  padding-left: 30px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -30px;
  top: 5px;
  width: 16px;
  height: 16px;
  background: var(--primary);
  border-radius: 50%;
  border: 3px solid #fff;
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.2);
  transition: var(--transition);
}

.timeline-item:hover::before {
  transform: scale(1.2);
  box-shadow: 0 0 0 6px rgba(255, 107, 53, 0.3);
}

.timeline-item h3 {
  color: #fff;
  font-size: 1.3rem;
  margin-bottom: 5px;
}

.timeline-item p {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.6;
}

body.dark .timeline-item h3 {
  color: #e0e0e0;
}

body.dark .timeline-item p {
  color: #aaa;
}

/* ===== 团队卡片 ===== */
.team-card {
  text-align: center;
}

.team-card svg {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin-bottom: 15px;
  margin: 0 auto 15px;
}

.team-card h3 {
  color: #fff;
  margin-bottom: 5px;
}

.team-card p {
  color: rgba(255, 255, 255, 0.7);
}

body.dark .team-card h3 {
  color: #e0e0e0;
}

/* ===== 产品卡片 ===== */
.product-card {
  text-align: center;
}

.product-card svg {
  width: 80px;
  height: 80px;
  margin-bottom: 15px;
  margin: 0 auto 15px;
  transition: var(--transition);
}

.product-card:hover svg {
  transform: scale(1.1) rotate(-5deg);
}

.product-card h3 {
  color: #fff;
  margin-bottom: 10px;
}

.product-card p {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.6;
}

body.dark .product-card h3 {
  color: #e0e0e0;
}

/* ===== 功能特色 ===== */
.feature-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 20px;
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(5px);
  margin-bottom: 20px;
  transition: var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.feature-item:hover {
  background: var(--glass-hover);
  transform: translateX(5px);
}

.feature-item svg {
  width: 50px;
  height: 50px;
  flex-shrink: 0;
  transition: var(--transition);
}

.feature-item:hover svg {
  transform: scale(1.1);
}

.feature-item h3 {
  color: #fff;
  margin-bottom: 5px;
  font-size: 1.1rem;
}

.feature-item p {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.6;
}

body.dark .feature-item h3 {
  color: #e0e0e0;
}

/* ===== 评价卡片 ===== */
.testimonial-card {
  text-align: center;
}

.testimonial-card p {
  font-style: italic;
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.7;
  font-size: 1.05rem;
}

.testimonial-card .author {
  margin-top: 15px;
  font-weight: 600;
  color: #fff;
  font-size: 0.95rem;
}

body.dark .testimonial-card p {
  color: #bbb;
}

/* ===== FAQ 手风琴 ===== */
.faq-item {
  margin-bottom: 15px;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--glass);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.15);
}

.faq-question {
  padding: 20px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #fff;
  font-weight: 600;
  transition: var(--transition);
  user-select: none;
}

.faq-question:hover {
  background: rgba(255, 255, 255, 0.1);
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 10px;
}

.faq-item.active .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 20px;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 20px 20px;
}

body.dark .faq-question {
  color: #e0e0e0;
}

/* ===== HowTo 步骤 ===== */
.howto-step {
  display: flex;
  gap: 20px;
  margin-bottom: 25px;
  align-items: flex-start;
}

.howto-step .step-num {
  width: 40px;
  height: 40px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  flex-shrink: 0;
  font-size: 1.1rem;
  box-shadow: 0 4px 10px rgba(255, 107, 53, 0.3);
}

.howto-step h3 {
  color: #fff;
  margin-bottom: 5px;
  font-size: 1.1rem;
}

.howto-step p {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.6;
}

body.dark .howto-step h3 {
  color: #e0e0e0;
}

/* ===== 联系信息 ===== */
.contact-info {
  color: rgba(255, 255, 255, 0.9);
}

.contact-info p {
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
}

body.dark .contact-info {
  color: #bbb;
}

/* ===== 地图占位 ===== */
.map-placeholder {
  width: 100%;
  height: 300px;
  background: var(--glass);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 1.2rem;
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* ===== 搜索框 ===== */
.search-box {
  display: flex;
  gap: 10px;
  max-width: 500px;
  margin: 20px auto;
}

.search-box input {
  flex: 1;
  padding: 12px 20px;
  border-radius: var(--radius-round);
  border: none;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(5px);
  color: #fff;
  font-size: 1rem;
  transition: var(--transition);
  outline: none;
}

.search-box input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.search-box input:focus {
  background: rgba(255, 255, 255, 0.3);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.3);
}

.search-box button {
  padding: 12px 24px;
  border-radius: var(--radius-round);
  border: none;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

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

body.dark .search-box input {
  background: rgba(255, 255, 255, 0.1);
  color: #e0e0e0;
}

/* ===== 文章卡片 ===== */
.article-card {
  padding: 25px;
}

.article-card h3 {
  color: #fff;
  margin-bottom: 10px;
  font-size: 1.15rem;
  line-height: 1.4;
}

.article-card .date {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  margin-bottom: 10px;
}

.article-card p {
  color: rgba(255, 255, 255, 0.8);
  margin: 10px 0;
  line-height: 1.6;
}

.article-card .read-more {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  display: inline-block;
  transition: var(--transition);
}

.article-card .read-more:hover {
  color: #fff;
  transform: translateX(5px);
}

body.dark .article-card h3 {
  color: #e0e0e0;
}

/* ===== 合作伙伴 ===== */
.partner-item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: var(--glass);
  border-radius: var(--radius);
  backdrop-filter: blur(5px);
  transition: var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.partner-item:hover {
  background: var(--glass-hover);
  transform: scale(1.05);
}

.partner-item svg {
  width: 120px;
  height: 60px;
}

/* ===== 页脚 ===== */
footer {
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 60px 0 30px;
  color: rgba(255, 255, 255, 0.8);
}

body.dark footer {
  background: rgba(0, 0, 0, 0.6);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h3 {
  color: #fff;
  margin-bottom: 20px;
  font-size: 1.1rem;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

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

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: var(--transition);
  font-size: 0.95rem;
}

.footer-col ul li a:hover {
  color: var(--primary);
  padding-left: 5px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 30px;
  text-align: center;
  font-size: 0.9rem;
  line-height: 1.8;
}

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

.footer-bottom a:hover {
  color: #fff;
  text-decoration: underline;
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  box-shadow: var(--shadow-btn);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  border: none;
  outline: none;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-btn-hover);
  background: var(--primary-dark);
}

/* ===== 动画类 ===== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.count-up {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary);
}

/* ===== 响应式设计 ===== */

/* 平板及以下 */
@media (max-width: 992px) {
  .hero {
    padding: 60px 0;
    min-height: auto;
  }
  
  .hero-content {
    flex-direction: column;
    text-align: center;
  }
  
  .hero-text p {
    margin: 0 auto 30px;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .hero-image svg {
    max-width: 400px;
  }
  
  section {
    padding: 60px 0;
  }
  
  .section-title {
    margin-bottom: 40px;
  }
}

/* 手机 */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }
  
  .header-inner {
    padding: 8px 15px;
  }
  
  .logo svg {
    width: 32px;
    height: 32px;
  }
  
  .logo-text {
    font-size: 1.2rem;
  }
  
  nav ul {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 20px;
    gap: 15px;
    z-index: 999;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  nav ul.open {
    display: flex;
  }
  
  nav a {
    font-size: 1rem;
    padding: 8px 0;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .dark-toggle {
    width: 36px;
    height: 36px;
    font-size: 1rem;
    margin-left: 10px;
  }
  
  .hero {
    padding: 40px 0;
    margin-top: var(--header-height);
  }
  
  .hero-text h1 {
    font-size: 1.8rem;
  }
  
  .hero-text p {
    font-size: 1rem;
  }
  
  .hero-image svg {
    max-width: 300px;
  }
  
  .btn {
    padding: 12px 24px;
    font-size: 0.95rem;
  }
  
  .section-title {
    font-size: 1.6rem;
  }
  
  .banner-slide {
    padding: 40px 20px;
  }
  
  .banner-slide h2 {
    font-size: 1.4rem;
  }
  
  .banner-slide p {
    font-size: 0.95rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .timeline {
    padding-left: 30px;
  }
  
  .feature-item {
    flex-direction: column;
    text-align: center;
    align-items: center;
  }
  
  .feature-item svg {
    margin-bottom: 10px;
  }
  
  .howto-step {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .back-to-top {
    width: 40px;
    height: 40px;
    font-size: 1.2rem;
    bottom: 20px;
    right: 20px;
  }
  
  .search-box {
    flex-direction: column;
    gap: 10px;
  }
  
  .search-box input {
    width: 100%;
  }
  
  .search-box button {
    width: 100%;
  }
  
  .breadcrumb {
    font-size: 0.85rem;
    padding: 10px 0;
  }
  
  .card {
    padding: 20px;
  }
  
  .about-content {
    font-size: 0.95rem;
  }
  
  .timeline-item h3 {
    font-size: 1.1rem;
  }
  
  .partner-item svg {
    width: 100px;
    height: 50px;
  }
}

/* 小屏手机 */
@media (max-width: 480px) {
  .hero-text h1 {
    font-size: 1.5rem;
  }
  
  .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
  }
  
  .section-title {
    font-size: 1.4rem;
  }
  
  .banner-slide {
    padding: 30px 15px;
  }
  
  .banner-slide h2 {
    font-size: 1.2rem;
  }
  
  .hero-image svg {
    max-width: 250px;
  }
  
  .logo-text {
    font-size: 1rem;
  }
  
  .logo svg {
    width: 28px;
    height: 28px;
  }
  
  .footer-col h3 {
    font-size: 1rem;
  }
  
  .contact-info p {
    font-size: 0.95rem;
  }
  
  .map-placeholder {
    height: 200px;
    font-size: 1rem;
  }
}

/* ===== 暗色模式额外优化 ===== */
body.dark .card .article-card .date {
  color: rgba(255, 255, 255, 0.5);
}

body.dark .faq-answer {
  color: #bbb;
}

body.dark .about-content strong {
  color: var(--primary);
}

/* ===== 打印样式 ===== */
@media print {
  header,
  .back-to-top,
  .banner-slider,
  .menu-toggle,
  .dark-toggle,
  .search-box {
    display: none !important;
  }
  
  body {
    background: #fff !important;
    color: #333 !important;
  }
  
  .hero {
    margin-top: 0;
    background: #f5f5f5 !important;
    padding: 40px 0;
  }
  
  .card {
    background: #f9f9f9 !important;
    border: 1px solid #ddd !important;
    box-shadow: none !important;
  }
  
  .section-title {
    color: #333 !important;
  }
  
  .section-title::after {
    background: #333 !important;
  }
}