/* ===== 91网 全站样式 ===== */
:root {
  --primary: #e8401c;
  --primary-dark: #c23010;
  --secondary: #ff6b35;
  --accent: #ffd166;
  --dark: #1a1a2e;
  --dark-2: #16213e;
  --text: #333333;
  --text-light: #666666;
  --text-muted: #999999;
  --bg: #ffffff;
  --bg-light: #f8f9fa;
  --bg-gray: #f2f3f5;
  --border: #e5e7eb;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 32px rgba(0,0,0,0.15);
  --radius: 12px;
  --radius-sm: 6px;
  --radius-lg: 20px;
  --transition: all 0.3s ease;
  --font: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
}

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

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

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

.section-alt {
  background: var(--bg-light);
}

.section-dark {
  background: var(--dark);
  color: #fff;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  color: var(--dark);
}

.section-title span {
  color: var(--primary);
}

.section-subtitle {
  text-align: center;
  color: var(--text-light);
  font-size: 1rem;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(232,64,28,0.35);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
}

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

.btn-white:hover {
  background: var(--accent);
  color: var(--dark);
}

/* ===== 顶部公告栏 ===== */
.top-bar {
  background: var(--dark);
  color: #ccc;
  font-size: 0.82rem;
  padding: 6px 0;
  text-align: center;
}

.top-bar a { color: var(--accent); }

/* ===== 导航 ===== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #fff;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  font-weight: 900;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
  background: rgba(232,64,28,0.06);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ===== 搜索框 ===== */
.search-bar-wrap {
  background: var(--bg-gray);
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.search-bar {
  display: flex;
  align-items: center;
  max-width: 640px;
  margin: 0 auto;
  background: #fff;
  border: 2px solid var(--border);
  border-radius: 50px;
  overflow: hidden;
  transition: var(--transition);
}

.search-bar:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(232,64,28,0.1);
}

.search-bar input {
  flex: 1;
  border: none;
  outline: none;
  padding: 10px 20px;
  font-size: 0.95rem;
  font-family: var(--font);
  background: transparent;
}

.search-bar button {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 10px 24px;
  font-size: 0.95rem;
  cursor: pointer;
  font-family: var(--font);
  font-weight: 600;
  transition: var(--transition);
}

.search-bar button:hover {
  background: var(--primary-dark);
}

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 12px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { margin: 0 6px; }

/* ===== Hero 区域 ===== */
.hero {
  position: relative;
  min-height: 520px;
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 60%, #0f3460 100%);
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('../assets/images/hero_banner.jpg') center/cover no-repeat;
  opacity: 0.18;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,209,102,0.15);
  color: var(--accent);
  border: 1px solid rgba(255,209,102,0.3);
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 900;
  color: #fff;
  line-height: 1.25;
  margin-bottom: 16px;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.75);
  margin-bottom: 32px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-stats {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-end;
}

.hero-stat-card {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  padding: 16px 24px;
  text-align: center;
  color: #fff;
  min-width: 140px;
}

.hero-stat-card .num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
}

.hero-stat-card .label {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.7);
  margin-top: 4px;
}

.hero-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

/* ===== 视频卡片 ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.video-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  cursor: pointer;
}

.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
  background: var(--bg-gray);
}

.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.video-card:hover .video-thumb img {
  transform: scale(1.06);
}

.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.35);
  opacity: 0;
  transition: var(--transition);
}

.video-card:hover .video-play-btn {
  opacity: 1;
}

.play-icon {
  width: 56px;
  height: 56px;
  background: rgba(255,255,255,0.95);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: var(--transition);
}

.video-card:hover .play-icon {
  transform: scale(1);
}

.play-icon::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent var(--primary);
  margin-left: 4px;
}

.video-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 50px;
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
}

.video-info {
  padding: 16px;
}

.video-info h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.video-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ===== 品牌故事 ===== */
.story-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.story-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}

.story-img img {
  width: 100%;
  height: 380px;
  object-fit: cover;
}

.story-content h2 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 16px;
}

.story-content p {
  color: var(--text-light);
  line-height: 1.9;
  margin-bottom: 16px;
}

.story-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.story-tag {
  background: rgba(232,64,28,0.08);
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
}

/* ===== 场景推荐 ===== */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scene-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 2px solid transparent;
}

.scene-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.scene-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.8rem;
}

.scene-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 10px;
}

.scene-card p {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== 用户评价 ===== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.review-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
  transition: var(--transition);
}

.review-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.review-stars {
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 12px;
}

.review-text {
  font-size: 0.92rem;
  color: var(--text);
  line-height: 1.75;
  margin-bottom: 16px;
  font-style: italic;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 10px;
}

.review-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  flex-shrink: 0;
}

.review-name {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--dark);
}

.review-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ===== 媒体达人 ===== */
.media-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.media-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.media-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.media-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea, #764ba2);
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.4rem;
  font-weight: 800;
}

.media-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--dark);
  margin-bottom: 4px;
}

.media-fans {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.media-quote {
  font-size: 0.82rem;
  color: var(--text-light);
  line-height: 1.6;
  font-style: italic;
}

/* ===== 购买指南 ===== */
.guide-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.guide-steps::before {
  content: '';
  position: absolute;
  top: 36px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  z-index: 0;
}

.guide-step {
  text-align: center;
  position: relative;
  z-index: 1;
}

.step-num {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: #fff;
  font-size: 1.5rem;
  font-weight: 800;
  box-shadow: 0 4px 16px rgba(232,64,28,0.3);
}

.guide-step h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}

.guide-step p {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: #fff;
  border-radius: var(--radius);
  margin-bottom: 12px;
  box-shadow: var(--shadow);
  overflow: hidden;
  border: 1px solid var(--border);
}

.faq-question {
  padding: 18px 24px;
  font-weight: 700;
  font-size: 0.97rem;
  color: var(--dark);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--primary);
  background: rgba(232,64,28,0.03);
}

.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--primary);
  font-weight: 400;
  transition: var(--transition);
  flex-shrink: 0;
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding: 0 24px 18px;
  font-size: 0.92rem;
  color: var(--text-light);
  line-height: 1.8;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.faq-item.open .faq-answer {
  display: block;
}

/* ===== 联系我们 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-info h2 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 16px;
}

.contact-info p {
  color: var(--text-light);
  margin-bottom: 28px;
  line-height: 1.8;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
}

.contact-item-icon {
  width: 44px;
  height: 44px;
  background: rgba(232,64,28,0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-item-text strong {
  display: block;
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.contact-item-text span {
  font-size: 0.95rem;
  color: var(--dark);
  font-weight: 600;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.social-btn {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: var(--transition);
}

.social-btn:hover {
  background: var(--primary);
  color: #fff;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
}

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

.footer-col ul li a {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--accent);
}

.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
  flex-wrap: wrap;
  gap: 10px;
}

.footer-bottom a {
  color: rgba(255,255,255,0.4);
}

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

/* ===== 内页通用 ===== */
.page-hero {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
  padding: 60px 0;
  color: #fff;
}

.page-hero h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.page-hero p {
  color: rgba(255,255,255,0.7);
  font-size: 1rem;
}

.content-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 40px;
  padding: 60px 0;
}

.content-main {}

.content-sidebar {}

.sidebar-widget {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
}

.sidebar-widget h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary);
}

.sidebar-links li {
  margin-bottom: 10px;
}

.sidebar-links li a {
  font-size: 0.88rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 6px;
}

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

/* ===== 标签 ===== */
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 600;
}

.tag-red { background: rgba(232,64,28,0.1); color: var(--primary); }
.tag-blue { background: rgba(59,130,246,0.1); color: #3b82f6; }
.tag-green { background: rgba(16,185,129,0.1); color: #10b981; }
.tag-yellow { background: rgba(245,158,11,0.1); color: #f59e0b; }

/* ===== 移动端适配 ===== */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

@media (max-width: 1024px) {
  .media-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .story-grid { gap: 40px; }
}

@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .section-title { font-size: 1.6rem; }
  .hero h1 { font-size: 1.9rem; }
  .hero-flex { flex-direction: column; }
  .hero-stats { flex-direction: row; align-items: center; width: 100%; }
  .story-grid { grid-template-columns: 1fr; }
  .scene-grid { grid-template-columns: 1fr; }
  .guide-steps { grid-template-columns: repeat(2, 1fr); }
  .guide-steps::before { display: none; }
  .contact-grid { grid-template-columns: 1fr; }
  .content-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    padding: 16px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
    z-index: 999;
  }
  .video-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .media-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.5rem; }
  .guide-steps { grid-template-columns: 1fr; }
  .hero-stats { flex-wrap: wrap; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease both;
}

/* ===== 分页 ===== */
.pagination {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 40px;
}

.pagination a,
.pagination span {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  border: 1px solid var(--border);
  color: var(--text);
  transition: var(--transition);
}

.pagination a:hover,
.pagination .current {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ===== 下载卡片 ===== */
.download-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 20px;
  transition: var(--transition);
  margin-bottom: 16px;
}

.download-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateX(4px);
}

.download-icon {
  width: 56px;
  height: 56px;
  background: rgba(232,64,28,0.1);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  flex-shrink: 0;
}

.download-info { flex: 1; }

.download-info h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 4px;
}

.download-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== 更新日志 ===== */
.changelog-item {
  display: flex;
  gap: 24px;
  margin-bottom: 32px;
}

.changelog-date {
  flex-shrink: 0;
  width: 100px;
  text-align: right;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding-top: 4px;
}

.changelog-line {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.changelog-dot {
  width: 12px;
  height: 12px;
  background: var(--primary);
  border-radius: 50%;
  margin-top: 6px;
}

.changelog-line-bar {
  width: 2px;
  flex: 1;
  background: var(--border);
  margin-top: 4px;
}

.changelog-content {
  flex: 1;
  background: #fff;
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow);
}

.changelog-content h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 10px;
}

.changelog-content ul {
  list-style: disc;
  padding-left: 20px;
}

.changelog-content ul li {
  font-size: 0.88rem;
  color: var(--text-light);
  margin-bottom: 6px;
  line-height: 1.7;
}

/* ===== 帮助中心 ===== */
.help-category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.help-category-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  cursor: pointer;
}

.help-category-card:hover {
  border: 2px solid var(--primary);
  transform: translateY(-3px);
}

.help-category-card .icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.help-category-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 6px;
}

.help-category-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ===== 技巧列表 ===== */
.tips-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.tip-item {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  display: flex;
  gap: 20px;
  transition: var(--transition);
}

.tip-item:hover {
  box-shadow: var(--shadow-hover);
}

.tip-num {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 1rem;
  flex-shrink: 0;
}

.tip-content h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}

.tip-content p {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== 通知条 ===== */
.notice-bar {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  color: #fff;
  padding: 10px 0;
  text-align: center;
  font-size: 0.88rem;
  font-weight: 600;
}

.notice-bar a { color: var(--accent); text-decoration: underline; }