/* =============================================
   WPS Office 落地站 - 主样式表
   色彩体系：深蓝专业企业风
   ============================================= */

:root {
  --primary: #1756FF;
  --dark: #0A2463;
  --light: #EEF2FF;
  --accent: #F59E0B;
  --text: #1F2937;
  --muted: #6B7280;
  --bg: #FFFFFF;
  --card: #F8FAFF;
  --border: #E5E7EB;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

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

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
}

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

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

a:hover {
  text-decoration: underline;
}

ul {
  list-style: none;
}

/* =============================================
   布局工具
   ============================================= */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

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

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

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-title {
  font-size: 42px;
  font-weight: 700;
  color: var(--dark);
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-dark .section-title {
  color: #fff;
}

.section-subtitle {
  font-size: 18px;
  color: var(--muted);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.7;
}

.section-dark .section-subtitle {
  color: rgba(255, 255, 255, 0.75);
}

/* =============================================
   导航
   ============================================= */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--dark);
  box-shadow: 0 2px 12px rgba(10, 36, 99, 0.25);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.3px;
  text-decoration: none;
}

.nav-logo:hover {
  text-decoration: none;
  color: #fff;
}

.nav-logo-icon {
  width: 36px;
  height: 36px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 900;
  color: #fff;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-size: 15px;
  padding: 8px 16px;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
  border-bottom: 2px solid transparent;
}

.nav-links a:hover {
  color: #fff;
  text-decoration: none;
  background: rgba(255, 255, 255, 0.1);
}

.nav-links a.active {
  color: #fff;
  font-weight: 600;
  border-bottom: 2px solid var(--accent);
}

/* =============================================
   按钮
   ============================================= */
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 14px 32px;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
  box-shadow: 0 4px 16px rgba(245, 158, 11, 0.35);
  text-decoration: none;
  line-height: 1.2;
}

.btn-download:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(245, 158, 11, 0.45);
  color: #fff;
  text-decoration: none;
}

.btn-download:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.7);
  border-radius: 8px;
  padding: 12px 28px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  text-decoration: none;
  line-height: 1.2;
}

.btn-outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.1);
  text-decoration: none;
  color: #fff;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 12px 28px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
  box-shadow: 0 4px 12px rgba(23, 86, 255, 0.3);
  text-decoration: none;
  line-height: 1.2;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(23, 86, 255, 0.4);
  color: #fff;
  text-decoration: none;
}

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 18px 48px;
  font-size: 20px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 6px 24px rgba(245, 158, 11, 0.4);
  text-decoration: none;
}

.btn-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 32px rgba(245, 158, 11, 0.5);
  color: #fff;
  text-decoration: none;
}

.btn-sm {
  padding: 10px 22px;
  font-size: 15px;
}

/* =============================================
   Hero 区
   ============================================= */
.hero {
  background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
  min-height: 80vh;
  display: flex;
  align-items: center;
  padding-top: 64px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  animation: fadeInUp 0.8s ease both;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 100px;
  padding: 6px 16px;
  color: rgba(255, 255, 255, 0.9);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 52px;
  font-weight: 800;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

.hero-desc {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.75;
  margin-bottom: 40px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-meta {
  margin-top: 32px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
}

.hero-meta-item svg {
  width: 16px;
  height: 16px;
  color: var(--accent);
}

/* =============================================
   功能卡片网格
   ============================================= */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg);
  border-radius: 12px;
  padding: 32px 24px;
  box-shadow: 0 2px 12px rgba(10, 36, 99, 0.08);
  transition: transform 0.25s, box-shadow 0.25s;
  border: 1px solid var(--border);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(10, 36, 99, 0.14);
}

.feature-icon {
  width: 56px;
  height: 56px;
  background: var(--light);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--primary);
}

.feature-icon svg {
  width: 28px;
  height: 28px;
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.7;
}

/* =============================================
   平台下载网格
   ============================================= */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.platform-card {
  background: var(--bg);
  border-radius: 12px;
  padding: 32px;
  border: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  gap: 24px;
  transition: transform 0.25s, box-shadow 0.25s;
}

.platform-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(10, 36, 99, 0.1);
}

.platform-icon {
  width: 64px;
  height: 64px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--light);
  border-radius: 14px;
  color: var(--primary);
}

.platform-icon svg {
  width: 36px;
  height: 36px;
}

.platform-info {
  flex: 1;
}

.platform-info h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}

.platform-info p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

/* =============================================
   数据统计区
   ============================================= */
.stats-section {
  background: var(--dark);
  padding: 80px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}

.stat-item {
  color: #fff;
}

.stat-number {
  font-size: 52px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
  letter-spacing: -1px;
}

.stat-label {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 600;
  margin-bottom: 8px;
}

.stat-desc {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.6;
}

/* =============================================
   用户评价
   ============================================= */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--bg);
  border-radius: 12px;
  padding: 32px;
  box-shadow: 0 2px 12px rgba(10, 36, 99, 0.08);
  border: 1px solid var(--border);
  position: relative;
}

.testimonial-card::before {
  content: "\201C";
  position: absolute;
  top: 16px;
  left: 24px;
  font-size: 64px;
  line-height: 1;
  color: var(--light);
  font-family: Georgia, serif;
  z-index: 0;
}

.testimonial-body {
  font-size: 15px;
  color: var(--text);
  line-height: 1.75;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
}

.testimonial-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--dark);
}

.testimonial-role {
  font-size: 13px;
  color: var(--muted);
}

/* =============================================
   对比表格
   ============================================= */
.compare-table-wrap {
  overflow-x: auto;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(10, 36, 99, 0.08);
  border: 1px solid var(--border);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.compare-table th {
  background: var(--dark);
  color: #fff;
  padding: 16px 20px;
  text-align: left;
  font-weight: 600;
  font-size: 14px;
  white-space: nowrap;
}

.compare-table th:first-child {
  border-radius: 0;
}

.compare-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}

.compare-table tr:last-child td {
  border-bottom: none;
}

.compare-table tr:nth-child(even) td {
  background: var(--card);
}

.compare-table tr:hover td {
  background: var(--light);
}

.compare-table .highlight-col {
  background: rgba(23, 86, 255, 0.05);
  font-weight: 500;
}

.badge-free {
  display: inline-block;
  background: #D1FAE5;
  color: #065F46;
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 600;
}

.badge-paid {
  display: inline-block;
  background: #FEF3C7;
  color: #92400E;
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 600;
}

.check-yes {
  color: #059669;
  font-weight: 700;
  font-size: 18px;
}

.check-partial {
  color: var(--accent);
  font-weight: 700;
  font-size: 18px;
}

.check-no {
  color: #DC2626;
  font-weight: 700;
  font-size: 18px;
}

/* =============================================
   FAQ
   ============================================= */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--dark);
  user-select: none;
  transition: color 0.2s;
}

.faq-question:hover {
  color: var(--primary);
}

.faq-question-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  background: var(--light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s, background 0.2s;
  color: var(--primary);
}

.faq-item.open .faq-question-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}

.faq-answer {
  display: none;
  padding-bottom: 20px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
}

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

/* =============================================
   功能深度区
   ============================================= */
.deep-feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.deep-feature-item h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--primary);
  display: inline-block;
}

.deep-feature-item p {
  font-size: 15px;
  color: var(--text);
  line-height: 1.8;
  margin-bottom: 12px;
}

/* =============================================
   步骤安装指南
   ============================================= */
.steps-list {
  list-style: none;
  counter-reset: step-counter;
}

.step-item {
  counter-increment: step-counter;
  display: flex;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}

.step-item:last-child {
  border-bottom: none;
}

.step-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: #fff;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
}

.step-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 10px;
}

.step-body p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
}

/* =============================================
   系统要求卡片
   ============================================= */
.requirements-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.requirement-card {
  background: var(--bg);
  border-radius: 12px;
  padding: 28px;
  border: 1px solid var(--border);
}

.requirement-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.requirement-card h3 svg {
  width: 22px;
  height: 22px;
  color: var(--primary);
}

.requirement-list {
  list-style: none;
}

.requirement-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  color: var(--text);
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  line-height: 1.5;
}

.requirement-list li:last-child {
  border-bottom: none;
}

.requirement-list li::before {
  content: "▸";
  color: var(--primary);
  flex-shrink: 0;
  margin-top: 1px;
}

/* =============================================
   版本记录
   ============================================= */
.changelog-list {
  list-style: none;
  max-width: 860px;
  margin: 0 auto;
}

.changelog-item {
  display: flex;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}

.changelog-item:last-child {
  border-bottom: none;
}

.changelog-version {
  flex-shrink: 0;
  text-align: center;
}

.changelog-version .version-tag {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  border-radius: 6px;
  padding: 4px 12px;
  white-space: nowrap;
  margin-bottom: 4px;
}

.changelog-version .version-date {
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
}

.changelog-body h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}

.changelog-body p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.75;
}

/* =============================================
   CTA 区块
   ============================================= */
.cta-section {
  background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
  padding: 96px 0;
  text-align: center;
}

.cta-section h2 {
  font-size: 40px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.2;
}

.cta-section p {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 40px;
}

/* =============================================
   富文本内容（软文页）
   ============================================= */
.article-body h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--dark);
  margin-top: 48px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--light);
}

.article-body h3 {
  font-size: 21px;
  font-weight: 700;
  color: var(--dark);
  margin-top: 32px;
  margin-bottom: 12px;
}

.article-body p {
  font-size: 16px;
  color: var(--text);
  line-height: 1.85;
  margin-bottom: 16px;
}

.article-body ul {
  padding-left: 0;
  margin-bottom: 16px;
}

.article-body ul li {
  font-size: 15px;
  color: var(--text);
  padding: 6px 0 6px 20px;
  position: relative;
  line-height: 1.7;
}

.article-body ul li::before {
  content: "▸";
  color: var(--primary);
  position: absolute;
  left: 0;
}

.article-hero {
  background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
  padding: 120px 0 80px;
  color: #fff;
}

.article-hero h1 {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  max-width: 820px;
}

.article-hero p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.8);
  max-width: 680px;
  line-height: 1.75;
}

.article-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

.comparison-block {
  background: var(--card);
  border-radius: 12px;
  padding: 28px 32px;
  margin: 24px 0;
  border-left: 4px solid var(--primary);
}

.comparison-block p {
  margin-bottom: 8px;
}

.comparison-block p:last-child {
  margin-bottom: 0;
}

.comparison-block strong {
  color: var(--dark);
}

.cta-article {
  background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
  border-radius: 16px;
  padding: 56px 48px;
  text-align: center;
  margin: 56px 0;
}

.cta-article h2 {
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
  border: none;
}

.cta-article p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 16px;
  margin-bottom: 28px;
}

.tip-box {
  background: var(--light);
  border-radius: 10px;
  padding: 20px 24px;
  margin: 20px 0;
  border-left: 4px solid var(--primary);
}

.tip-box p {
  margin-bottom: 0;
  font-size: 15px;
  color: var(--text);
}

/* =============================================
   页脚
   ============================================= */
footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.75);
  padding: 48px 0 32px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer-security {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  padding: 16px 24px;
  margin-bottom: 28px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
}

.footer-security svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--accent);
}

.footer-copy {
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
  margin-top: 16px;
}

/* =============================================
   下载页英雄区
   ============================================= */
.download-hero {
  background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
  padding: 120px 0 80px;
  text-align: center;
}

.download-hero h1 {
  font-size: 48px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 20px;
  line-height: 1.2;
}

.download-hero-desc {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin: 0 auto 16px;
  line-height: 1.7;
}

.download-meta-text {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  margin-top: 12px;
}

/* =============================================
   主下载卡片
   ============================================= */
.main-download-card {
  background: var(--bg);
  border-radius: 16px;
  padding: 48px;
  box-shadow: 0 8px 32px rgba(10, 36, 99, 0.12);
  border: 1px solid var(--border);
  max-width: 700px;
  margin: -40px auto 0;
  position: relative;
  z-index: 10;
}

.main-download-card h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}

.main-download-card .file-info {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.info-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--light);
  color: var(--primary);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 12px;
  font-weight: 500;
}

/* =============================================
   响应式
   ============================================= */
@media (max-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

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

  .deep-feature-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 36px;
  }

  .section-title {
    font-size: 30px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .platform-grid {
    grid-template-columns: 1fr;
  }

  .testimonial-grid {
    grid-template-columns: 1fr;
  }

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

  .requirements-grid {
    grid-template-columns: 1fr;
  }

  .nav-links a {
    padding: 6px 10px;
    font-size: 13px;
  }

  .platform-card {
    flex-direction: column;
    gap: 16px;
  }

  .section {
    padding: 56px 0;
  }

  .cta-section h2 {
    font-size: 28px;
  }

  .main-download-card {
    padding: 32px 24px;
    margin: -24px 16px 0;
  }

  .article-hero h1 {
    font-size: 28px;
  }

  .download-hero h1 {
    font-size: 32px;
  }

  .cta-article {
    padding: 36px 24px;
  }

  .cta-article h2 {
    font-size: 24px;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn-download,
  .hero-actions .btn-outline {
    text-align: center;
    justify-content: center;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .stat-number {
    font-size: 36px;
  }

  .step-item {
    flex-direction: column;
    gap: 12px;
  }

  .changelog-item {
    flex-direction: column;
    gap: 8px;
  }
}