/* =============================================
   搜狗输入法下载官网 - 主样式文件
   符合谷歌SEO/GEO标准，贴近官网风格
   ============================================= */

/* CSS变量 */
:root {
  --color-primary: #2B7FFF;
  --color-primary-dark: #1a6fe0;
  --color-primary-light: #EBF3FF;
  --color-accent: #FF6B35;
  --color-accent-dark: #e55a24;
  --color-green: #28C76F;
  --color-purple: #7B61FF;
  --color-text: #1a1a2e;
  --color-text-secondary: #555577;
  --color-text-light: #888899;
  --color-bg: #ffffff;
  --color-bg-gray: #f7f8fc;
  --color-bg-blue: #EBF3FF;
  --color-border: #e8ecf4;
  --color-shadow: rgba(43, 127, 255, 0.12);
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "WenQuanYi Micro Hei", sans-serif;
  --border-radius: 12px;
  --border-radius-lg: 20px;
  --transition: all 0.3s ease;
  --container-width: 1200px;
  --header-height: 70px;
}

/* 重置样式 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-primary-dark); }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
details { cursor: pointer; }
summary { list-style: none; }
summary::-webkit-details-marker { display: none; }

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

/* =============================================
   头部导航
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
  display: flex;
  align-items: center;
  box-shadow: 0 2px 16px rgba(0,0,0,0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  width: 100%;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.site-logo img { height: 40px; width: auto; }
.logo-tagline {
  font-size: 13px;
  color: var(--color-text-secondary);
  white-space: nowrap;
  border-left: 1px solid var(--color-border);
  padding-left: 10px;
}

.main-nav { flex: 1; }
.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-item a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: 8px;
  transition: var(--transition);
  white-space: nowrap;
}
.nav-item a:hover,
.nav-item.active a {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.btn-download-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 22px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 24px;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: var(--transition);
  box-shadow: 0 4px 14px rgba(255, 107, 53, 0.35);
  flex-shrink: 0;
}
.btn-download-header:hover {
  background: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.45);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  margin-left: auto;
}
.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* =============================================
   Hero轮播区
   ============================================= */
.hero-section {
  position: relative;
  overflow: hidden;
}

.hero-slider {
  position: relative;
  min-height: 560px;
}

.slide {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  min-height: 560px;
  display: flex;
  align-items: center;
  opacity: 0;
  transition: opacity 0.6s ease;
  pointer-events: none;
}
.slide.active {
  position: relative;
  opacity: 1;
  pointer-events: auto;
}

.slide-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.slide-bg-1 { background: linear-gradient(135deg, #ddeeff 0%, #eef5ff 40%, #f0f8ff 100%); }
.slide-bg-2 { background: linear-gradient(135deg, #e8f8f0 0%, #f0fff8 40%, #f5fff8 100%); }
.slide-bg-3 { background: linear-gradient(135deg, #f0ebff 0%, #f8f5ff 40%, #faf5ff 100%); }

.slide .container { position: relative; z-index: 1; }

.slide-content {
  display: flex;
  align-items: center;
  gap: 60px;
  padding: 60px 0;
}

.slide-text { flex: 1; }

.slide-title {
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-text);
  margin-bottom: 20px;
}
.slide-title .highlight {
  color: var(--color-primary);
  display: block;
}

.slide-desc {
  font-size: 17px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 480px;
}

.slide-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 32px;
  font-size: 17px;
  font-weight: 700;
  transition: var(--transition);
  box-shadow: 0 6px 20px var(--color-shadow);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 10px 28px var(--color-shadow);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 14px 32px;
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
  border-radius: 32px;
  font-size: 17px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-secondary:hover {
  background: var(--color-primary-light);
}

.slide-stats {
  display: flex;
  gap: 32px;
}
.stat-item { text-align: center; }
.stat-num {
  display: block;
  font-size: 26px;
  font-weight: 800;
  color: var(--color-primary);
}
.stat-label {
  font-size: 13px;
  color: var(--color-text-light);
}

.slide-image {
  flex-shrink: 0;
  width: 520px;
}
.slide-image img {
  width: 100%;
  border-radius: var(--border-radius-lg);
  box-shadow: 0 20px 60px rgba(43, 127, 255, 0.15);
}

/* 轮播控制 */
.slider-controls {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 10;
}

.slider-prev, .slider-next {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.85);
  color: var(--color-primary);
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.12);
  transition: var(--transition);
}
.slider-prev:hover, .slider-next:hover {
  background: var(--color-primary);
  color: #fff;
}

.slider-dots { display: flex; gap: 8px; }
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(43, 127, 255, 0.3);
  transition: var(--transition);
}
.dot.active {
  width: 24px;
  border-radius: 4px;
  background: var(--color-primary);
}

/* =============================================
   通用Section样式
   ============================================= */
.section-header {
  text-align: center;
  margin-bottom: 56px;
  position: relative;
}
.section-title {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 12px;
}
.section-subtitle {
  font-size: 16px;
  color: var(--color-text-secondary);
}
.section-more {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}
.section-more:hover { text-decoration: underline; }

/* =============================================
   核心功能特色区
   ============================================= */
.features-section {
  padding: 80px 0;
  background: var(--color-bg);
}

.feature-block {
  display: flex;
  align-items: center;
  gap: 72px;
  margin-bottom: 80px;
}
.feature-block:last-child { margin-bottom: 0; }
.feature-block-right { flex-direction: row-reverse; }

.feature-image {
  flex-shrink: 0;
  width: 480px;
}
.feature-image img {
  width: 100%;
  border-radius: var(--border-radius-lg);
  box-shadow: 0 16px 48px rgba(43, 127, 255, 0.12);
}

.feature-content { flex: 1; }

.feature-badge {
  display: inline-block;
  padding: 4px 14px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}
.feature-badge-green { background: #e8f8f0; color: var(--color-green); }
.feature-badge-purple { background: #f0ebff; color: var(--color-purple); }

.feature-title {
  font-size: clamp(22px, 2.5vw, 30px);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 16px;
  line-height: 1.3;
}

.feature-desc {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.9;
  margin-bottom: 28px;
}

.feature-stats {
  display: flex;
  gap: 28px;
  margin-bottom: 32px;
}
.fstat {}
.fstat-num {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--color-accent);
}
.fstat-label {
  font-size: 13px;
  color: var(--color-text-light);
}

.btn-feature {
  display: inline-flex;
  align-items: center;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 10px 24px;
  border: 2px solid var(--color-primary);
  border-radius: 24px;
  transition: var(--transition);
}
.btn-feature:hover {
  background: var(--color-primary);
  color: #fff;
}

/* =============================================
   功能特点六宫格
   ============================================= */
.func-grid-section {
  padding: 80px 0;
  background: var(--color-bg-gray);
}

.func-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.func-card {
  background: var(--color-bg);
  border-radius: var(--border-radius);
  padding: 32px 28px;
  transition: var(--transition);
  border: 1px solid var(--color-border);
  cursor: default;
}
.func-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px var(--color-shadow);
  border-color: var(--color-primary-light);
}

.func-icon {
  width: 56px;
  height: 56px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.func-icon img { width: 48px; height: 48px; border-radius: 12px; }

.func-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
}

.func-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* =============================================
   下载CTA区
   ============================================= */
.download-cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, #1a6fe0 0%, #2B7FFF 50%, #5ba3ff 100%);
  color: #fff;
}

.download-cta-inner {
  display: flex;
  align-items: center;
  gap: 80px;
}

.download-cta-text { flex: 1; }
.download-cta-text h2 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  margin-bottom: 12px;
}
.download-cta-text p {
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: 24px;
}

.download-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.download-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  opacity: 0.95;
}

.download-cta-action {
  flex-shrink: 0;
  text-align: center;
}

.btn-download-big {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 18px 48px;
  background: #fff;
  color: var(--color-primary);
  border-radius: 40px;
  font-size: 20px;
  font-weight: 800;
  transition: var(--transition);
  box-shadow: 0 8px 28px rgba(0,0,0,0.2);
  margin-bottom: 16px;
}
.btn-download-big:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 40px rgba(0,0,0,0.3);
  color: var(--color-primary-dark);
}

.download-version, .download-sys {
  font-size: 13px;
  opacity: 0.8;
  margin-top: 6px;
}

/* =============================================
   新闻资讯区
   ============================================= */
.news-section {
  padding: 80px 0;
  background: var(--color-bg);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.news-card {
  background: var(--color-bg);
  border-radius: var(--border-radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px var(--color-shadow);
  border-color: var(--color-primary-light);
}

.news-card-link { display: block; color: inherit; text-decoration: none; }
.news-card-link:hover { color: inherit; }

.news-card-image {
  overflow: hidden;
  aspect-ratio: 16/9;
}
.news-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.news-card:hover .news-card-image img { transform: scale(1.05); }

.news-card-body { padding: 20px; }

.news-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card:hover .news-card-title { color: var(--color-primary); }

.news-card-excerpt {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--color-text-light);
}

/* =============================================
   用户评价区
   ============================================= */
.reviews-section {
  padding: 80px 0;
  background: var(--color-bg-gray);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--color-bg);
  border-radius: var(--border-radius);
  padding: 28px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.review-card:hover {
  box-shadow: 0 8px 28px var(--color-shadow);
  border-color: var(--color-primary-light);
}

.review-stars {
  color: #FFB800;
  font-size: 18px;
  margin-bottom: 14px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 18px;
  font-style: normal;
  border-left: 3px solid var(--color-primary-light);
  padding-left: 14px;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}
.review-role {
  font-size: 12px;
  color: var(--color-text-light);
  font-weight: 400;
}

/* =============================================
   FAQ区
   ============================================= */
.faq-section {
  padding: 80px 0;
  background: var(--color-bg);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item[open] {
  border-color: var(--color-primary);
  box-shadow: 0 4px 16px var(--color-shadow);
}

.faq-question {
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
}
.faq-question::after {
  content: '+';
  font-size: 22px;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: var(--transition);
}
.faq-item[open] .faq-question::after { content: '−'; }
.faq-question:hover { color: var(--color-primary); }

.faq-answer {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}
.faq-answer a { color: var(--color-primary); text-decoration: underline; }

/* =============================================
   页脚
   ============================================= */
.site-footer {
  background: #1a1a2e;
  color: rgba(255,255,255,0.75);
}

.footer-top { padding: 60px 0 40px; }

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand img { margin-bottom: 16px; filter: brightness(0) invert(1); opacity: 0.9; }
.footer-brand-desc {
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 14px;
  color: rgba(255,255,255,0.6);
}
.footer-contact {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
}
.footer-contact a { color: rgba(255,255,255,0.8); }
.footer-contact a:hover { color: #fff; }

.footer-nav-title {
  font-size: 15px;
  font-weight: 700;
  color: rgba(255,255,255,0.9);
  margin-bottom: 18px;
}
.footer-nav ul { display: flex; flex-direction: column; gap: 10px; }
.footer-nav a {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}
.footer-nav a:hover { color: #fff; padding-left: 4px; }

.footer-links {
  padding: 20px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-links-title {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  margin-bottom: 10px;
}
.footer-links-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}
.footer-links-list a {
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  transition: var(--transition);
}
.footer-links-list a:hover { color: rgba(255,255,255,0.9); }

.footer-bottom { padding: 20px 0; }
.footer-bottom-inner {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.footer-copyright {
  font-size: 13px;
  color: rgba(255,255,255,0.45);
}
.footer-copyright a { color: rgba(255,255,255,0.55); }
.footer-copyright a:hover { color: rgba(255,255,255,0.85); }
.footer-seo-text {
  font-size: 12px;
  color: rgba(255,255,255,0.35);
}
.footer-seo-text a { color: rgba(255,255,255,0.45); }
.footer-seo-text a:hover { color: rgba(255,255,255,0.7); }

/* =============================================
   列表页专用样式
   ============================================= */
.page-hero {
  background: linear-gradient(135deg, #ddeeff 0%, #eef5ff 100%);
  padding: 48px 0;
}
.page-hero-inner {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-hero h1 {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 800;
  color: var(--color-text);
}
.page-hero p {
  font-size: 16px;
  color: var(--color-text-secondary);
}

/* 面包屑 */
.breadcrumb {
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}
.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-light);
}
.breadcrumb-list a { color: var(--color-text-secondary); }
.breadcrumb-list a:hover { color: var(--color-primary); }
.breadcrumb-sep { color: var(--color-text-light); }
.breadcrumb-current { color: var(--color-text); font-weight: 500; }

/* 列表页主体 */
.list-main {
  padding: 48px 0 80px;
  background: var(--color-bg-gray);
}
.list-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
}

/* 文章列表 */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.article-item {
  background: var(--color-bg);
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
}
.article-item:hover {
  box-shadow: 0 8px 28px var(--color-shadow);
  border-color: var(--color-primary-light);
}

.article-item-image {
  flex-shrink: 0;
  width: 220px;
}
.article-item-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.article-item:hover .article-item-image img { transform: scale(1.05); }

.article-item-body {
  padding: 20px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.article-item-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 10px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-item:hover .article-item-title { color: var(--color-primary); }

.article-item-excerpt {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}

.article-item-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--color-text-light);
}
.article-item-meta a {
  color: var(--color-primary);
  font-weight: 600;
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 40px;
}
.page-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: var(--transition);
  text-decoration: none;
}
.page-btn:hover,
.page-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.page-btn.prev, .page-btn.next { width: auto; padding: 0 16px; }

/* 侧边栏 */
.sidebar { display: flex; flex-direction: column; gap: 24px; }

.sidebar-widget {
  background: var(--color-bg);
  border-radius: var(--border-radius);
  padding: 24px;
  border: 1px solid var(--color-border);
}
.sidebar-widget-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
}

.sidebar-download {
  background: linear-gradient(135deg, #2B7FFF 0%, #5ba3ff 100%);
  color: #fff;
  text-align: center;
}
.sidebar-download .sidebar-widget-title { color: #fff; border-color: rgba(255,255,255,0.3); }
.sidebar-download p { font-size: 13px; opacity: 0.9; margin-bottom: 16px; }
.btn-sidebar-download {
  display: block;
  padding: 12px 24px;
  background: #fff;
  color: var(--color-primary);
  border-radius: 24px;
  font-weight: 700;
  font-size: 15px;
  text-align: center;
  transition: var(--transition);
}
.btn-sidebar-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
  color: var(--color-primary-dark);
}

.sidebar-news-list { display: flex; flex-direction: column; gap: 14px; }
.sidebar-news-item { display: flex; gap: 12px; }
.sidebar-news-img { flex-shrink: 0; width: 72px; height: 54px; border-radius: 8px; overflow: hidden; }
.sidebar-news-img img { width: 100%; height: 100%; object-fit: cover; }
.sidebar-news-info {}
.sidebar-news-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 4px;
}
.sidebar-news-item:hover .sidebar-news-title { color: var(--color-primary); }
.sidebar-news-date { font-size: 11px; color: var(--color-text-light); }

/* =============================================
   内容页专用样式
   ============================================= */
.article-content-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  padding: 48px 0 80px;
}

.article-main {}
.article-header {
  background: var(--color-bg);
  border-radius: var(--border-radius);
  padding: 32px;
  margin-bottom: 24px;
  border: 1px solid var(--color-border);
}
.article-category {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 16px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 14px;
}
.article-title {
  font-size: clamp(20px, 2.5vw, 28px);
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: 16px;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 13px;
  color: var(--color-text-light);
  flex-wrap: wrap;
}
.article-meta-item { display: flex; align-items: center; gap: 4px; }

.article-featured-image {
  border-radius: var(--border-radius);
  overflow: hidden;
  margin-bottom: 24px;
  aspect-ratio: 16/9;
}
.article-featured-image img { width: 100%; height: 100%; object-fit: cover; }

.article-body {
  background: var(--color-bg);
  border-radius: var(--border-radius);
  padding: 32px;
  border: 1px solid var(--color-border);
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-text);
}
.article-body h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 32px 0 16px;
  color: var(--color-text);
  padding-left: 14px;
  border-left: 4px solid var(--color-primary);
}
.article-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 24px 0 12px;
  color: var(--color-text);
}
.article-body p { margin-bottom: 18px; }
.article-body ul, .article-body ol {
  margin: 0 0 18px 24px;
  list-style: disc;
}
.article-body li { margin-bottom: 8px; }
.article-body img {
  border-radius: 10px;
  margin: 20px 0;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}
.article-body a { color: var(--color-primary); text-decoration: underline; }
.article-body blockquote {
  background: var(--color-bg-blue);
  border-left: 4px solid var(--color-primary);
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  margin: 20px 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

/* 相关文章 */
.related-articles {
  margin-top: 32px;
  background: var(--color-bg);
  border-radius: var(--border-radius);
  padding: 28px;
  border: 1px solid var(--color-border);
}
.related-articles h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--color-text);
}
.related-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.related-item {
  display: flex;
  gap: 12px;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.related-item:hover {
  border-color: var(--color-primary-light);
  background: var(--color-bg-gray);
}
.related-item-img { flex-shrink: 0; width: 80px; height: 60px; border-radius: 8px; overflow: hidden; }
.related-item-img img { width: 100%; height: 100%; object-fit: cover; }
.related-item-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-item:hover .related-item-title { color: var(--color-primary); }

/* =============================================
   下载页专用样式
   ============================================= */
.download-hero {
  background: linear-gradient(135deg, #ddeeff 0%, #eef5ff 60%, #f0f8ff 100%);
  padding: 60px 0;
}
.download-hero-inner {
  display: flex;
  align-items: center;
  gap: 60px;
}
.download-hero-text { flex: 1; }
.download-hero-text h1 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: 12px;
}
.download-hero-text p {
  font-size: 17px;
  color: var(--color-text-secondary);
  margin-bottom: 28px;
}
.download-hero-image { flex-shrink: 0; width: 480px; }
.download-hero-image img { width: 100%; border-radius: var(--border-radius-lg); }

.download-info-bar {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.download-info-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-secondary);
}
.download-info-label { font-weight: 600; color: var(--color-text); }

.btn-download-main {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 40px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 36px;
  font-size: 18px;
  font-weight: 700;
  transition: var(--transition);
  box-shadow: 0 8px 24px var(--color-shadow);
}
.btn-download-main:hover {
  background: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 12px 32px var(--color-shadow);
}

.download-tabs-section {
  padding: 60px 0 80px;
  background: var(--color-bg-gray);
}

.download-tabs {
  display: flex;
  gap: 4px;
  background: var(--color-bg);
  border-radius: 12px;
  padding: 6px;
  margin-bottom: 32px;
  border: 1px solid var(--color-border);
  width: fit-content;
}
.tab-btn {
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text-secondary);
  transition: var(--transition);
}
.tab-btn.active, .tab-btn:hover {
  background: var(--color-primary);
  color: #fff;
}

.download-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.download-card {
  background: var(--color-bg);
  border-radius: var(--border-radius);
  padding: 28px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.download-card:hover {
  box-shadow: 0 8px 28px var(--color-shadow);
  border-color: var(--color-primary-light);
}
.download-card-icon {
  width: 56px;
  height: 56px;
  background: var(--color-primary-light);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 28px;
}
.download-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}
.download-card-version {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 16px;
}
.download-card-info {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 20px;
  font-size: 13px;
  color: var(--color-text-secondary);
}
.download-card-info span { display: flex; align-items: center; gap: 6px; }
.btn-card-download {
  display: block;
  text-align: center;
  padding: 11px 20px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 24px;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-card-download:hover {
  background: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-1px);
}

/* 安装步骤 */
.install-steps-section {
  padding: 60px 0;
  background: var(--color-bg);
}
.install-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.install-steps::before {
  content: '';
  position: absolute;
  top: 32px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: var(--color-border);
  z-index: 0;
}
.step-item {
  text-align: center;
  position: relative;
  z-index: 1;
}
.step-num {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  box-shadow: 0 6px 20px var(--color-shadow);
}
.step-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}
.step-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* =============================================
   响应式设计
   ============================================= */
@media (max-width: 1024px) {
  .feature-block { gap: 40px; }
  .feature-image { width: 380px; }
  .download-cta-inner { gap: 48px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .list-layout { grid-template-columns: 1fr; }
  .article-content-layout { grid-template-columns: 1fr; }
  .sidebar { display: grid; grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --header-height: 60px; }

  .logo-tagline { display: none; }
  .main-nav { display: none; }
  .btn-download-header { display: none; }
  .mobile-menu-btn { display: flex; }

  .main-nav.open {
    display: block;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #fff;
    padding: 16px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    z-index: 999;
  }
  .main-nav.open .nav-list { flex-direction: column; gap: 4px; }
  .main-nav.open .nav-item a { padding: 12px 16px; }

  .slide-content { flex-direction: column; gap: 32px; padding: 40px 0; }
  .slide-image { width: 100%; }
  .slide-stats { gap: 20px; }

  .feature-block, .feature-block-right { flex-direction: column; gap: 28px; }
  .feature-image { width: 100%; }

  .func-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: 1fr; }

  .download-cta-inner { flex-direction: column; gap: 32px; text-align: center; }
  .download-features { align-items: center; }

  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .sidebar { grid-template-columns: 1fr; }

  .article-item { flex-direction: column; }
  .article-item-image { width: 100%; height: 180px; }

  .download-hero-inner { flex-direction: column; gap: 32px; }
  .download-hero-image { width: 100%; }
  .download-cards { grid-template-columns: 1fr; }
  .install-steps { grid-template-columns: repeat(2, 1fr); }
  .install-steps::before { display: none; }

  .related-list { grid-template-columns: 1fr; }
  .section-more { position: static; transform: none; display: block; margin-top: 8px; }
}

@media (max-width: 480px) {
  .func-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .download-tabs { flex-wrap: wrap; width: 100%; }
  .install-steps { grid-template-columns: 1fr; }
}

/* =============================================
   无障碍与打印
   ============================================= */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

@media print {
  .site-header, .site-footer, .sidebar, .slider-controls { display: none; }
  .article-body { padding: 0; border: none; }
}

/* =============================================
   辅助类
   ============================================= */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* =============================================
   标签云
   ============================================= */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag-item {
  display: inline-block;
  padding: 5px 14px;
  background: var(--color-bg-gray);
  color: var(--color-text-secondary);
  border-radius: 20px;
  font-size: 13px;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.tag-item:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-color: var(--color-primary-light);
}

/* 文章列表readmore链接 */
.article-item-readmore {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  margin-left: auto;
}
.article-item-readmore:hover { text-decoration: underline; }

/* =============================================
   内容页专用补充样式
   ============================================= */

/* 文章标签区 */
.article-tags {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}
.article-tags-label {
  font-size: 13px;
  color: var(--color-text-light);
  flex-shrink: 0;
}

/* 文章底部下载CTA */
.article-download-cta {
  margin-top: 32px;
  background: linear-gradient(135deg, #EBF3FF 0%, #ddeeff 100%);
  border-radius: var(--border-radius);
  padding: 28px 32px;
  border: 1px solid #c8deff;
}
.article-download-cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.article-download-cta-text h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
}
.article-download-cta-text p {
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* 上一篇/下一篇导航 */
.article-nav {
  display: flex;
  gap: 16px;
  margin-top: 24px;
}
.article-nav-prev, .article-nav-next {
  flex: 1;
  padding: 16px 20px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.article-nav-prev:hover, .article-nav-next:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}
.article-nav-next { text-align: right; }
.article-nav-label {
  font-size: 12px;
  color: var(--color-text-light);
  display: block;
}
.article-nav-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-nav-prev:hover .article-nav-title,
.article-nav-next:hover .article-nav-title { color: var(--color-primary); }

/* 文章目录 */
.toc-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.toc-list li { list-style: none; }
.toc-list a {
  font-size: 13px;
  color: var(--color-text-secondary);
  padding: 4px 0;
  display: block;
  border-left: 2px solid transparent;
  padding-left: 10px;
  transition: var(--transition);
}
.toc-list a:hover {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
}

@media (max-width: 768px) {
  .article-download-cta-inner { flex-direction: column; }
  .article-nav { flex-direction: column; }
  .article-nav-next { text-align: left; }
}

/* =============================================
   下载页补充样式
   ============================================= */

/* 下载Hero按钮组 */
.download-hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.btn-download-mac {
  background: #333;
}
.btn-download-mac:hover {
  background: #111;
  color: #fff;
}

/* 安全提示 */
.download-safe-tips {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.safe-tip {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* Tab面板 */
.tab-panel {
  display: none;
}
.tab-panel.active {
  display: block;
}

/* 更新日志 */
.changelog-section {
  padding: 60px 0;
  background: var(--color-bg-gray);
}
.changelog-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.changelog-item {
  background: var(--color-bg);
  border-radius: var(--border-radius);
  padding: 24px 28px;
  border: 1px solid var(--color-border);
}
.changelog-version {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 14px;
}
.changelog-ver-num {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 4px 14px;
  border-radius: 20px;
}
.changelog-date {
  font-size: 13px;
  color: var(--color-text-light);
}
.changelog-notes {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.changelog-notes li {
  font-size: 14px;
  color: var(--color-text-secondary);
  padding-left: 18px;
  position: relative;
}
.changelog-notes li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

@media (max-width: 768px) {
  .download-hero-btns { flex-direction: column; }
  .btn-download-main { justify-content: center; }
  .download-safe-tips { flex-direction: column; gap: 8px; }
}