/* ===== 蘑菇视频官网主样式 ===== */
:root {
  --primary: #6c63ff;
  --secondary: #00d4ff;
  --accent: #a855f7;
  --bg-dark: #050a14;
  --bg-card: #0d1526;
  --bg-card2: #111d35;
  --text-main: #e8eaf6;
  --text-muted: #8892b0;
  --neon-blue: #00d4ff;
  --neon-purple: #a855f7;
  --gradient-main: linear-gradient(135deg, #6c63ff 0%, #00d4ff 100%);
  --gradient-hero: linear-gradient(135deg, #050a14 0%, #0d1526 60%, #1a0a2e 100%);
  --border-color: rgba(108,99,255,0.25);
  --radius: 12px;
  --shadow: 0 8px 32px rgba(108,99,255,0.18);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: var(--secondary); text-decoration: none; transition: color 0.3s; }
a:hover { color: var(--primary); }

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

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

/* ===== 通用容器 ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-sm { padding: 48px 0; }

/* ===== 标题样式 ===== */
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-sub {
  text-align: center;
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 48px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  border: none;
  text-decoration: none;
}
.btn-primary {
  background: var(--gradient-main);
  color: #fff;
  box-shadow: 0 4px 20px rgba(108,99,255,0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(108,99,255,0.6);
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--secondary);
  border: 2px solid var(--secondary);
}
.btn-outline:hover {
  background: var(--secondary);
  color: var(--bg-dark);
}

/* ===== 卡片 ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: var(--primary);
}

/* ===== 顶部导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(5,10,20,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: all 0.3s;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-main);
  white-space: nowrap;
}
.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-main);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}
.logo span { background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s;
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--secondary);
  background: rgba(0,212,255,0.08);
}

/* 搜索框 */
.header-search {
  display: flex;
  align-items: center;
  background: var(--bg-card2);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 6px 16px;
  gap: 8px;
  flex: 0 0 220px;
  transition: border-color 0.3s;
}
.header-search:focus-within { border-color: var(--primary); }
.header-search input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 0.88rem;
  width: 100%;
}
.header-search input::placeholder { color: var(--text-muted); }
.header-search button {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0;
  font-size: 1rem;
  transition: color 0.3s;
}
.header-search button:hover { color: var(--secondary); }

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
}

/* ===== 搜索栏（导航下方） ===== */
.search-bar-wrap {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  padding: 14px 0;
  margin-top: 68px;
}
.search-bar-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 700px;
  margin: 0 auto;
  padding: 0 24px;
}
.search-bar-inner input {
  flex: 1;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 10px 20px;
  color: var(--text-main);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.3s;
}
.search-bar-inner input:focus { border-color: var(--primary); }
.search-bar-inner button {
  background: var(--gradient-main);
  border: none;
  border-radius: 50px;
  padding: 10px 24px;
  color: #fff;
  font-size: 0.9rem;
  cursor: pointer;
  font-weight: 600;
  transition: opacity 0.3s;
}
.search-bar-inner button:hover { opacity: 0.85; }

/* ===== Hero Banner ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 120px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  z-index: 0;
}
.hero-bg-img {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.18;
  z-index: 1;
}
.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 3;
  max-width: 640px;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(108,99,255,0.15);
  border: 1px solid rgba(108,99,255,0.4);
  border-radius: 50px;
  padding: 6px 16px;
  font-size: 0.82rem;
  color: var(--secondary);
  margin-bottom: 24px;
  font-weight: 500;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 20px;
}
.hero h1 .highlight {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 56px;
  flex-wrap: wrap;
}
.hero-stat-item { text-align: center; }
.hero-stat-num {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stat-label { font-size: 0.82rem; color: var(--text-muted); margin-top: 4px; }

/* ===== 产品矩阵 ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.product-card { position: relative; overflow: hidden; }
.product-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 20px;
  transition: transform 0.4s;
}
.product-card:hover .product-card-img { transform: scale(1.04); }
.product-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-main);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 16px;
}
.product-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; }
.product-card p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 16px; }
.product-features { display: flex; gap: 8px; flex-wrap: wrap; }
.feature-tag {
  background: rgba(108,99,255,0.12);
  border: 1px solid rgba(108,99,255,0.3);
  border-radius: 50px;
  padding: 3px 12px;
  font-size: 0.78rem;
  color: var(--secondary);
}

/* ===== 技术引擎 ===== */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.tech-item {
  background: var(--bg-card2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  transition: all 0.3s;
}
.tech-item:hover { border-color: var(--primary); transform: translateY(-4px); }
.tech-icon { font-size: 2.4rem; margin-bottom: 14px; }
.tech-item h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.tech-item p { font-size: 0.85rem; color: var(--text-muted); }

/* ===== 解决方案 ===== */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.solution-card {
  background: var(--bg-card2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.3s;
}
.solution-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: var(--accent); }
.solution-card-img { width: 100%; height: 180px; object-fit: cover; }
.solution-card-body { padding: 24px; }
.solution-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; }
.solution-card p { color: var(--text-muted); font-size: 0.88rem; margin-bottom: 14px; }
.solution-benefits { list-style: none; }
.solution-benefits li {
  font-size: 0.85rem;
  color: var(--text-muted);
  padding: 4px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.solution-benefits li::before { content: "✓"; color: var(--secondary); font-weight: 700; }

/* ===== 价值交付流程 ===== */
.process-steps {
  display: flex;
  gap: 0;
  position: relative;
  flex-wrap: wrap;
  justify-content: center;
}
.process-step {
  flex: 1;
  min-width: 160px;
  max-width: 220px;
  text-align: center;
  padding: 24px 16px;
  position: relative;
}
.process-step::after {
  content: "→";
  position: absolute;
  right: -10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--primary);
  font-size: 1.4rem;
  font-weight: 700;
}
.process-step:last-child::after { display: none; }
.step-num {
  width: 52px;
  height: 52px;
  background: var(--gradient-main);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  margin: 0 auto 16px;
  color: #fff;
}
.process-step h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
.process-step p { font-size: 0.82rem; color: var(--text-muted); }

/* ===== 案例 ===== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.case-card {
  background: var(--bg-card2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s;
}
.case-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-main);
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.case-client { font-size: 0.82rem; color: var(--secondary); font-weight: 600; margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.5px; }
.case-card p { color: var(--text-muted); font-size: 0.9rem; }

/* ===== 视频卡片 ===== */
.videos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--bg-card2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.3s;
}
.video-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--primary); }
.video-thumb-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
}
.video-thumb-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.video-card:hover .video-thumb-wrap img { transform: scale(1.06); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.3);
  opacity: 0;
  transition: opacity 0.3s;
}
.video-card:hover .video-play-btn { opacity: 1; }
.play-icon {
  width: 56px;
  height: 56px;
  background: rgba(108,99,255,0.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: #fff;
  backdrop-filter: blur(4px);
  transform: scale(0.8);
  transition: transform 0.3s;
}
.video-card:hover .play-icon { transform: scale(1); }
.video-meta { padding: 14px 16px; }
.video-title { font-size: 0.9rem; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
.video-stats { display: flex; gap: 12px; font-size: 0.78rem; color: var(--text-muted); }
.video-stat { display: flex; align-items: center; gap: 4px; }

/* ===== 新闻动态 ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.news-card {
  background: var(--bg-card2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.3s;
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--primary); }
.news-card-img { width: 100%; height: 180px; object-fit: cover; transition: transform 0.4s; }
.news-card:hover .news-card-img { transform: scale(1.04); }
.news-card-body { padding: 20px; }
.news-tag {
  display: inline-block;
  background: rgba(108,99,255,0.15);
  color: var(--secondary);
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 50px;
  margin-bottom: 10px;
  font-weight: 600;
}
.news-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; line-height: 1.5; }
.news-card p { font-size: 0.83rem; color: var(--text-muted); }
.news-date { font-size: 0.78rem; color: var(--text-muted); margin-top: 12px; }

/* ===== 用户评论 ===== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--bg-card2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
  transition: all 0.3s;
}
.review-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.review-quote { font-size: 2.5rem; color: var(--primary); line-height: 1; margin-bottom: 12px; font-family: Georgia, serif; }
.review-text { font-size: 0.9rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; }
.review-user { font-size: 0.85rem; font-weight: 700; color: var(--text-main); }
.review-stars { color: #fbbf24; font-size: 0.85rem; margin-top: 4px; }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card2);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.3s;
}
.faq-item.open { border-color: var(--primary); }
.faq-question {
  padding: 18px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.95rem;
  font-weight: 600;
  user-select: none;
  transition: color 0.3s;
}
.faq-question:hover { color: var(--secondary); }
.faq-arrow { transition: transform 0.3s; font-size: 1rem; color: var(--primary); }
.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  padding: 0 24px;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.8;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 18px; }

/* ===== 联系我们 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-info h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 24px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
}
.contact-icon {
  width: 44px;
  height: 44px;
  background: rgba(108,99,255,0.15);
  border: 1px solid rgba(108,99,255,0.3);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.contact-item-label { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 4px; }
.contact-item-val { font-size: 0.92rem; font-weight: 600; }
.contact-form { background: var(--bg-card2); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 32px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 6px; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 10px 14px;
  color: var(--text-main);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.3s;
  font-family: inherit;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--primary); }
.form-group textarea { resize: vertical; min-height: 100px; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 56px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand p { font-size: 0.88rem; color: var(--text-muted); margin-top: 14px; line-height: 1.8; }
.footer-col h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 16px; color: var(--text-main); }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 0.85rem; color: var(--text-muted); transition: color 0.3s; }
.footer-col ul li a:hover { color: var(--secondary); }
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--secondary); }

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 14px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--secondary); }
.breadcrumb span { color: var(--text-muted); }
.breadcrumb .current { color: var(--text-main); }

/* ===== 内页 Hero ===== */
.page-hero {
  padding: 140px 0 60px;
  text-align: center;
  background: linear-gradient(180deg, #0d1526 0%, var(--bg-dark) 100%);
  position: relative;
  overflow: hidden;
}
.page-hero h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; margin-bottom: 16px; }
.page-hero p { color: var(--text-muted); font-size: 1rem; max-width: 560px; margin: 0 auto; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .main-nav { display: none; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: rgba(5,10,20,0.98); padding: 16px; border-bottom: 1px solid var(--border-color); gap: 4px; }
  .main-nav.open { display: flex; }
  .mobile-toggle { display: block; }
  .header-search { display: none; }
  .hero { padding-top: 160px; }
  .hero-stats { gap: 24px; }
  .process-steps { flex-direction: column; align-items: center; }
  .process-step::after { content: "↓"; right: auto; top: auto; bottom: -16px; left: 50%; transform: translateX(-50%); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 56px 0; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; }
  .btn { justify-content: center; }
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(108,99,255,0.3); }
  50% { box-shadow: 0 0 40px rgba(108,99,255,0.6); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.animate-fade-up { animation: fadeInUp 0.7s ease both; }
.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }

/* ===== 粒子背景 ===== */
#particles-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
}

/* ===== 内页栏目 ===== */
.inner-section-nav {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  padding: 0;
  overflow-x: auto;
}
.inner-section-nav ul {
  display: flex;
  list-style: none;
  gap: 0;
  white-space: nowrap;
}
.inner-section-nav ul li a {
  display: block;
  padding: 14px 20px;
  font-size: 0.88rem;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  transition: all 0.3s;
}
.inner-section-nav ul li a:hover,
.inner-section-nav ul li a.active {
  color: var(--secondary);
  border-bottom-color: var(--secondary);
}

/* ===== 下载按钮 ===== */
.download-section {
  background: linear-gradient(135deg, rgba(108,99,255,0.15) 0%, rgba(0,212,255,0.1) 100%);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 48px;
  text-align: center;
}
.download-section h2 { font-size: 1.8rem; font-weight: 800; margin-bottom: 12px; }
.download-section p { color: var(--text-muted); margin-bottom: 28px; }
.download-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.download-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-card2);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 14px 24px;
  color: var(--text-main);
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.3s;
  cursor: pointer;
}
.download-btn:hover { border-color: var(--primary); background: rgba(108,99,255,0.1); color: var(--secondary); }
.download-btn-icon { font-size: 1.6rem; }
.download-btn-text { text-align: left; }
.download-btn-sub { font-size: 0.72rem; color: var(--text-muted); font-weight: 400; }