/* ==================== CSS 变量 ==================== */
:root {
  --primary: #FF6B35;
  --primary-dark: #E55A2B;
  --primary-light: #FF8C5A;
  --secondary: #F7931E;
  --accent: #FFB347;
  --bg: #FAFAFA;
  --bg-card: #FFFFFF;
  --bg-section: #F5F5F5;
  --text: #1A1A2E;
  --text-secondary: #4A4A5A;
  --text-muted: #8A8A9A;
  --border: #E8E8F0;
  --border-light: #F0F0F5;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
  --shadow: 0 4px 20px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
  --shadow-primary: 0 8px 30px rgba(255,107,53,0.25);
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container: 1200px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-text-size-adjust: 100%;
}

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

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  cursor: pointer;
  font-family: inherit;
}

ul, ol {
  list-style: none;
}

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

/* ==================== 导航栏 ==================== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow);
}

.nav-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
  color: var(--text);
  flex-shrink: 0;
}

.logo-icon {
  width: 36px;
  height: 36px;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  color: var(--text);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
}

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

.nav-link {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(255,107,53,0.06);
}

.nav-link.active {
  color: var(--primary);
  background: rgba(255,107,53,0.08);
  font-weight: 600;
}

/* ==================== Hero 区域 ==================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(26,26,46,0.88) 0%,
    rgba(26,26,46,0.75) 50%,
    rgba(26,26,46,0.85) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  padding: 120px 24px 80px;
  color: white;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(255,107,53,0.2);
  border: 1px solid rgba(255,107,53,0.35);
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}

.hero-badge svg {
  width: 16px;
  height: 16px;
  fill: var(--primary);
  stroke: none;
}

.hero-title {
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero-subtitle {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255,255,255,0.75);
  margin-bottom: 36px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

/* ==================== 按钮系统 ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
  border: 2px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
  background: none;
}

.btn svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(255,107,53,0.35);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-outline {
  border-color: rgba(255,255,255,0.3);
  color: white;
  background: rgba(255,255,255,0.08);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(255,255,255,0.5);
}

.versions .btn-outline,
.platform-card .btn-outline {
  border-color: var(--border);
  color: var(--text);
  background: transparent;
}

.versions .btn-outline:hover,
.platform-card .btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(255,107,53,0.04);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 17px;
  border-radius: 12px;
}

.btn-lg svg {
  width: 20px;
  height: 20px;
}

.btn-block {
  width: 100%;
  padding: 14px 24px;
}

/* ==================== Hero 统计 ==================== */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}

.stat-item {
  padding: 0 32px;
  text-align: center;
}

.stat-number {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,0.8) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

.stat-label {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  margin-top: 4px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.15);
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.5);
  font-size: 13px;
  animation: bounce 2s infinite;
}

.hero-scroll-indicator svg {
  width: 20px;
  height: 20px;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(8px); }
  60% { transform: translateX(-50%) translateY(4px); }
}

/* ==================== 区块通用样式 ==================== */
section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-block;
  padding: 6px 18px;
  background: linear-gradient(135deg, rgba(255,107,53,0.08) 0%, rgba(247,147,30,0.08) 100%);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 100px;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: var(--text);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ==================== 功能特色 ==================== */
.features {
  background: var(--bg);
}

.feature-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 100px;
}

.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border);
}

.feature-icon {
  width: 56px;
  height: 56px;
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 100%;
  height: 100%;
}

.feature-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}

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

/* 功能详细介绍 */
.feature-detail-sections {
  display: flex;
  flex-direction: column;
  gap: 80px;
}

.feature-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.feature-detail-reverse {
  direction: rtl;
}

.feature-detail-reverse > * {
  direction: ltr;
}

.feature-detail-text h3 {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 20px;
}

.feature-detail-text p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.feature-list {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--text);
}

.feature-list li svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.feature-detail-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.feature-detail-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ==================== 多平台支持 ==================== */
.platforms {
  background: var(--bg-section);
}

.platform-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.platform-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

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

.platform-header {
  padding: 28px 24px 20px;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 16px;
}

.platform-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
}

.platform-icon svg {
  width: 100%;
  height: 100%;
}

.platform-info h3 {
  font-size: 18px;
  font-weight: 700;
}

.platform-version {
  font-size: 13px;
  color: var(--text-muted);
}

.platform-body {
  padding: 24px;
}

.platform-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.platform-requirements {
  margin-bottom: 24px;
}

.platform-requirements h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}

.platform-requirements ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.platform-requirements li {
  font-size: 13px;
  color: var(--text-secondary);
  padding-left: 14px;
  position: relative;
}

.platform-requirements li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 5px;
  background: var(--primary);
  border-radius: 50%;
}

/* ==================== 用户评价 ==================== */
.reviews {
  background: var(--bg);
}

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

.review-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.review-card:hover {
  box-shadow: var(--shadow);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}

.review-avatar {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
}

.review-avatar svg {
  width: 100%;
  height: 100%;
}

.review-meta h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

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

.review-rating {
  display: flex;
  gap: 3px;
  margin-bottom: 14px;
}

.review-rating svg {
  width: 16px;
  height: 16px;
  color: #FFB347;
}

.review-text {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  font-style: italic;
}

/* ==================== 安全保障 ==================== */
.security {
  background: var(--bg-section);
}

.security-badges {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}

.security-badge {
  text-align: center;
  padding: 36px 28px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  transition: var(--transition);
}

.security-badge:hover {
  box-shadow: var(--shadow);
}

.security-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
}

.security-icon svg {
  width: 100%;
  height: 100%;
}

.security-badge h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.security-badge p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* 文件校验 */
.security-checksum {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border-light);
  margin-bottom: 60px;
}

.security-checksum h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.security-checksum > p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.checksum-box {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.checksum-item {
  display: flex;
  gap: 16px;
  align-items: baseline;
  flex-wrap: wrap;
}

.checksum-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  min-width: 80px;
  flex-shrink: 0;
}

.checksum-value {
  font-size: 14px;
  color: var(--text);
  font-family: "SF Mono", "Fira Code", "Consolas", monospace;
}

.checksum-hash {
  font-size: 13px;
  color: var(--text-muted);
  word-break: break-all;
}

/* 对比表格 */
.compare-section {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  border: 1px solid var(--border-light);
}

.compare-title {
  font-size: 22px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 32px;
}

.compare-table-wrapper {
  overflow-x: auto;
}

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

.compare-table th {
  padding: 16px 20px;
  text-align: left;
  font-weight: 600;
  color: var(--text);
  background: var(--bg-section);
  border-bottom: 2px solid var(--border);
}

.compare-table th:first-child {
  border-radius: 8px 0 0 0;
  width: 25%;
}

.compare-table th:last-child {
  border-radius: 0 8px 0 0;
}

.compare-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
  line-height: 1.6;
}

.compare-table tbody tr:hover {
  background: rgba(255,107,53,0.02);
}

.col-wps {
  color: var(--primary);
  font-weight: 500;
}

.compare-highlight {
  font-weight: 600;
}

/* ==================== 版本选择 ==================== */
.versions {
  background: var(--bg);
}

.version-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: start;
}

.version-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  overflow: hidden;
  position: relative;
  transition: var(--transition);
}

.version-card:hover {
  box-shadow: var(--shadow);
}

.version-recommended {
  border-color: var(--primary);
  box-shadow: var(--shadow-primary);
  transform: scale(1.02);
}

.version-badge {
  position: absolute;
  top: 0;
  right: 24px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  font-size: 12px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 0 0 8px 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.version-header {
  padding: 36px 28px 28px;
  border-bottom: 1px solid var(--border-light);
}

.version-name {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.version-price {
  margin-bottom: 10px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.price-amount {
  font-size: 36px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.price-period {
  font-size: 14px;
  color: var(--text-muted);
}

.version-desc {
  font-size: 14px;
  color: var(--text-secondary);
}

.version-body {
  padding: 28px;
}

.version-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 28px;
}

.version-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text);
}

.version-features li svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.version-features .feature-disabled {
  color: var(--text-muted);
}

.feature-highlight {
  font-weight: 600;
}

/* ==================== FAQ ==================== */
.faq {
  background: var(--bg-section);
}

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

.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--border);
}

.faq-item.active {
  border-color: rgba(255,107,53,0.3);
  box-shadow: 0 4px 16px rgba(255,107,53,0.06);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 28px;
  background: none;
  border: none;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  transition: var(--transition);
}

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

.faq-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--text-muted);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.25s ease;
  opacity: 0;
}

.faq-item.active .faq-answer {
  opacity: 1;
}

.faq-answer-content {
  padding: 0 28px 24px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.faq-answer-content p {
  margin-bottom: 12px;
}

.faq-answer-content p:last-child {
  margin-bottom: 0;
}

.faq-answer-content strong {
  color: var(--text);
}

.faq-answer-content ul,
.faq-answer-content ol {
  padding-left: 20px;
  margin: 10px 0;
}

.faq-answer-content ul {
  list-style: disc;
}

.faq-answer-content ol {
  list-style: decimal;
}

.faq-answer-content li {
  margin-bottom: 8px;
  padding-left: 4px;
}

/* ==================== CTA Banner ==================== */
.cta-banner {
  background: linear-gradient(135deg, var(--text) 0%, #2A2A4A 100%);
  color: white;
  padding: 80px 0;
  text-align: center;
}

.cta-content {
  max-width: 600px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-content > p {
  font-size: 17px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 32px;
}

.cta-note {
  margin-top: 16px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}

/* ==================== 页脚 ==================== */
.footer {
  background: #13131F;
  color: rgba(255,255,255,0.6);
  padding: 60px 0 32px;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 28px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: white;
  font-weight: 700;
  font-size: 18px;
}

.footer-logo {
  width: 32px;
  height: 32px;
}

.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: white;
}

.footer-divider {
  height: 1px;
  background: rgba(255,255,255,0.08);
  margin-bottom: 24px;
}

.footer-legal {
  text-align: center;
}

.footer-legal p {
  font-size: 13px;
  line-height: 1.8;
  color: rgba(255,255,255,0.4);
}

/* ==================== 回到顶部 ==================== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* ==================== Spin 动画 ==================== */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ==================== 滚动入场动画 ==================== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

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

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

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

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

  .feature-detail {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .feature-detail-reverse {
    direction: ltr;
  }
}

@media (max-width: 768px) {
  html {
    scroll-padding-top: 60px;
  }

  section {
    padding: 60px 0;
  }

  .nav-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid var(--border-light);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
  }

  .nav-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-link {
    width: 100%;
    padding: 12px 16px;
  }

  .hero-content {
    padding: 100px 20px 60px;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn-lg {
    width: 100%;
    max-width: 320px;
  }

  .hero-stats {
    gap: 16px;
  }

  .stat-item {
    padding: 0 16px;
  }

  .stat-divider {
    display: none;
  }

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

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

  .review-cards {
    grid-template-columns: 1fr;
  }

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

  .version-cards {
    grid-template-columns: 1fr;
  }

  .version-recommended {
    transform: none;
    order: -1;
  }

  .compare-section {
    padding: 24px;
  }

  .compare-table th,
  .compare-table td {
    padding: 12px 14px;
    font-size: 14px;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .feature-detail-sections {
    gap: 50px;
  }

  .cta-content h2 {
    font-size: 26px;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 30px;
  }

  .section-title {
    font-size: 24px;
  }

  .security-badges {
    grid-template-columns: 1fr;
  }

  .stat-item {
    min-width: 120px;
  }
}

/* ==================== 打印样式 ==================== */
@media print {
  .navbar,
  .hero-scroll-indicator,
  .back-to-top,
  .btn,
  .footer-links {
    display: none !important;
  }

  section {
    padding: 30px 0;
    page-break-inside: avoid;
  }

  .hero {
    min-height: auto;
    background: white !important;
    color: black !important;
  }

  .hero-overlay {
    display: none;
  }

  .hero-content {
    color: black;
  }
}