/* ═══════════════════════════════════════════════════
   WPS Office 安全下载站 — 全局样式表
   ═══════════════════════════════════════════════════ */

/* ─── CSS 变量 ─── */
:root {
  --bg-primary: #040A12;
  --bg-secondary: #0B1525;
  --bg-card: rgba(11, 21, 37, 0.6);
  --brand-red: #FF4A1C;
  --brand-orange: #FF6B00;
  --brand-gradient: linear-gradient(135deg, #FF4A1C, #FF6B00);
  --text-primary: #FFFFFF;
  --text-secondary: #9CA3AF;
  --text-muted: #374151;
  --border-glow: rgba(255, 255, 255, 0.1);
  --glass-bg: rgba(11, 21, 37, 0.6);
  --shadow-lg: 0 4px 30px rgba(0, 0, 0, 0.5);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 50px;
}

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

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

body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

button {
  cursor: pointer;
  border: none;
  outline: none;
  font-family: inherit;
}

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

ul, ol {
  list-style: none;
}

/* ─── 动画关键帧 ─── */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.05); opacity: 0.9; }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes particleFloat {
  0%, 100% {
    transform: translateY(0) translateX(0);
    opacity: 0.3;
  }
  25% {
    transform: translateY(-20px) translateX(10px);
    opacity: 0.8;
  }
  50% {
    transform: translateY(-40px) translateX(-5px);
    opacity: 0.5;
  }
  75% {
    transform: translateY(-20px) translateX(15px);
    opacity: 0.7;
  }
}

@keyframes borderGlow {
  0%, 100% { border-color: rgba(255, 74, 28, 0.2); }
  50% { border-color: rgba(255, 74, 28, 0.6); }
}

/* ─── 工具类 ─── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 60px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.text-gradient {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ─── 导航栏 ─── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 70px;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glow);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(11, 21, 37, 0.95);
  box-shadow: var(--shadow-lg);
}

.navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 20px;
}

.navbar-logo svg {
  width: 32px;
  height: 32px;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav-link {
  font-size: 15px;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
  padding: 8px 0;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--brand-gradient);
  border-radius: 1px;
}

.navbar-cta {
  background: var(--brand-gradient);
  color: #fff;
  padding: 10px 24px;
  border-radius: var(--radius-xl);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 4px 15px rgba(255, 74, 28, 0.3);
}

.navbar-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 74, 28, 0.4);
}

/* ─── Hero 区域 ─── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: 70px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero-bg-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-bg-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(255, 74, 28, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 30% 60%, rgba(11, 21, 37, 0.8) 0%, transparent 50%);
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 800px;
  padding: 0 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-xl);
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  animation: fadeInUp 0.6s ease-out both;
}

.hero-badge svg {
  width: 16px;
  height: 16px;
  color: var(--brand-red);
}

.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -2px;
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero h1 .highlight {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 40px;
  line-height: 1.8;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 18px 40px;
  background: var(--brand-gradient);
  background-size: 200% 200%;
  animation: fadeInUp 0.6s ease-out 0.3s both, gradientShift 4s ease infinite;
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 30px rgba(255, 74, 28, 0.4);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.hero-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  background-size: 200% 100%;
  animation: shimmer 3s ease-in-out infinite;
}

.hero-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(255, 74, 28, 0.5);
}

.hero-cta svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.hero-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 32px;
  font-size: 14px;
  color: var(--text-muted);
  animation: fadeInUp 0.6s ease-out 0.4s both;
}

.hero-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-meta svg {
  width: 14px;
  height: 14px;
}

/* ─── 功能特性卡片 ─── */
.features {
  padding: 120px 0;
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--brand-gradient);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: rgba(255, 74, 28, 0.3);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 20px rgba(255, 74, 28, 0.05);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 74, 28, 0.1);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  color: var(--brand-red);
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.feature-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ─── 平台下载入口 ─── */
.platforms {
  padding: 120px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(11, 21, 37, 0.4) 50%, transparent 100%);
}

.platforms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.platform-card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  transition: var(--transition);
}

.platform-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 74, 28, 0.2);
}

.platform-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
}

.platform-icon svg {
  width: 32px;
  height: 32px;
  color: var(--text-primary);
}

.platform-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.platform-card p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 20px;
  min-height: 40px;
}

.platform-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: transparent;
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-xl);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}

.platform-btn:hover {
  background: var(--brand-gradient);
  border-color: transparent;
  box-shadow: 0 4px 15px rgba(255, 74, 28, 0.3);
}

.platform-btn svg {
  width: 16px;
  height: 16px;
}

/* ─── 功能详细介绍 ─── */
.detail-section {
  padding: 120px 0;
}

.detail-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-bottom: 120px;
}

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

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

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

.detail-content h3 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.3;
}

.detail-content p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 16px;
}

.detail-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(255, 74, 28, 0.1), rgba(11, 21, 37, 0.8));
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.detail-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.detail-image-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  color: var(--text-secondary);
}

.detail-image-placeholder svg {
  width: 80px;
  height: 80px;
  opacity: 0.3;
}

/* ─── 用户评价 ─── */
.reviews {
  padding: 120px 0;
  background: linear-gradient(180deg, rgba(11, 21, 37, 0.6) 0%, transparent 100%);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

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

.review-card:hover {
  border-color: rgba(255, 74, 28, 0.2);
  transform: translateY(-4px);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.review-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--brand-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  flex-shrink: 0;
}

.review-meta h4 {
  font-size: 16px;
  font-weight: 600;
}

.review-stars {
  display: flex;
  gap: 2px;
  margin-top: 4px;
}

.review-stars svg {
  width: 16px;
  height: 16px;
  color: #FBBF24;
  fill: #FBBF24;
}

.review-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ─── 数据统计 ─── */
.stats {
  padding: 100px 0;
  position: relative;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  text-align: center;
}

.stat-item {
  padding: 32px;
}

.stat-number {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 900;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 12px;
}

.stat-label {
  font-size: 15px;
  color: var(--text-secondary);
}

/* ─── 对比表格 ─── */
.comparison {
  padding: 120px 0;
}

.comparison-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-glow);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 600px;
}

.comparison-table th {
  background: var(--bg-secondary);
  padding: 20px 24px;
  text-align: left;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-glow);
}

.comparison-table td {
  padding: 18px 24px;
  font-size: 15px;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.comparison-table tr:hover td {
  background: rgba(255, 74, 28, 0.03);
}

.comparison-table .check {
  color: #10B981;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.comparison-table .cross {
  color: #EF4444;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.comparison-table .partial {
  color: #F59E0B;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.comparison-table th:first-child {
  width: 40%;
}

/* ─── FAQ ─── */
.faq {
  padding: 120px 0;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

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

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0;
  background: none;
  color: var(--text-primary);
  font-size: 17px;
  font-weight: 600;
  text-align: left;
  transition: var(--transition);
}

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

.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
  color: var(--text-secondary);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  color: var(--brand-red);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding-bottom: 24px;
}

.faq-answer p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.9;
}

/* ─── CTA Banner ─── */
.cta-banner {
  padding: 100px 0;
  text-align: center;
  position: relative;
}

.cta-banner-inner {
  background: linear-gradient(135deg, rgba(255, 74, 28, 0.1), rgba(11, 21, 37, 0.8));
  border: 1px solid rgba(255, 74, 28, 0.15);
  border-radius: var(--radius-lg);
  padding: 80px 40px;
  position: relative;
  overflow: hidden;
}

.cta-banner-inner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 74, 28, 0.05) 0%, transparent 60%);
  animation: pulse 6s ease-in-out infinite;
}

.cta-banner h2 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
  position: relative;
}

.cta-banner p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
}

.cta-banner .btn-primary {
  position: relative;
}

/* ─── 页脚 ─── */
.footer {
  padding: 60px 0 32px;
  border-top: 1px solid var(--border-glow);
  background: rgba(4, 10, 18, 0.8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 48px;
}

.footer-brand .logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 16px;
}

.footer-brand .logo svg {
  width: 28px;
  height: 28px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 12px;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--brand-red);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-legal {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 700px;
}

.footer-copyright {
  font-size: 12px;
  color: var(--text-muted);
}

/* ─── 下载页专属样式 ─── */
.download-hero {
  min-height: auto;
  padding: 140px 0 80px;
}

.download-main {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 60px;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
}

.download-main::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--brand-gradient);
}

.download-main .os-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(255, 74, 28, 0.1);
  border: 1px solid rgba(255, 74, 28, 0.2);
  border-radius: var(--radius-xl);
  font-size: 14px;
  color: var(--brand-red);
  margin-bottom: 24px;
}

.download-main .os-badge svg {
  width: 18px;
  height: 18px;
}

.download-main h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
}

.download-main .version-info {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.btn-download-lg {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 20px 48px;
  background: var(--brand-gradient);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 30px rgba(255, 74, 28, 0.4);
  transition: var(--transition);
  margin-bottom: 24px;
}

.btn-download-lg:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(255, 74, 28, 0.5);
}

.btn-download-lg svg {
  width: 24px;
  height: 24px;
}

.download-meta-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--border-glow);
}

.download-meta-item {
  text-align: center;
}

.download-meta-item .label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.download-meta-item .value {
  font-size: 16px;
  font-weight: 600;
}

/* 安装指南 */
.install-guide {
  padding: 80px 0;
}

.steps {
  display: flex;
  gap: 32px;
  counter-reset: step;
}

.step {
  flex: 1;
  position: relative;
  padding-top: 48px;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: 0;
  left: 0;
  width: 36px;
  height: 36px;
  background: var(--brand-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
}

.step::after {
  content: '';
  position: absolute;
  top: 18px;
  left: 36px;
  right: -16px;
  height: 2px;
  background: linear-gradient(90deg, var(--brand-red), transparent);
  opacity: 0.3;
}

.step:last-child::after {
  display: none;
}

.step h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

/* 系统要求表格 */
.sysreq {
  padding: 80px 0;
}

.sysreq-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-glow);
}

.sysreq-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 500px;
}

.sysreq-table th,
.sysreq-table td {
  padding: 16px 24px;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.sysreq-table th {
  background: var(--bg-secondary);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.sysreq-table td {
  font-size: 14px;
  color: var(--text-secondary);
}

.sysreq-table tr:hover td {
  background: rgba(255, 74, 28, 0.03);
}

/* 更新日志 */
.changelog {
  padding: 80px 0;
}

.changelog-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 16px;
  transition: var(--transition);
}

.changelog-item:hover {
  border-color: rgba(255, 74, 28, 0.2);
}

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

.changelog-version {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  background: rgba(255, 74, 28, 0.1);
  border-radius: var(--radius-xl);
  font-size: 14px;
  font-weight: 600;
  color: var(--brand-red);
}

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

.changelog-item ul {
  list-style: none;
  padding: 0;
}

.changelog-item li {
  font-size: 15px;
  color: var(--text-secondary);
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
  line-height: 1.7;
}

.changelog-item li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 6px;
  height: 6px;
  background: var(--brand-red);
  border-radius: 50%;
  opacity: 0.6;
}

/* 安全下载 */
.security {
  padding: 80px 0;
}

.security-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.security-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
}

.security-card:hover {
  border-color: rgba(255, 74, 28, 0.2);
}

.security-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(16, 185, 129, 0.1);
  border-radius: 50%;
}

.security-icon svg {
  width: 28px;
  height: 28px;
  color: #10B981;
}

.security-card h4 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
}

.security-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ─── SEO 页专属样式 ─── */
.seo-hero {
  padding: 160px 0 80px;
}

.seo-content {
  padding: 80px 0;
}

.seo-content h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 24px;
  margin-top: 60px;
}

.seo-content h2:first-child {
  margin-top: 0;
}

.seo-content h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 32px 0 16px;
}

.seo-content p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 20px;
}

.seo-content ul {
  margin-bottom: 24px;
  padding-left: 20px;
}

.seo-content ul li {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 12px;
  position: relative;
  padding-left: 16px;
}

.seo-content ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--brand-red);
  border-radius: 50%;
}

.seo-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

.seo-cta-box {
  background: linear-gradient(135deg, rgba(255, 74, 28, 0.1), rgba(11, 21, 37, 0.8));
  border: 1px solid rgba(255, 74, 28, 0.2);
  border-radius: var(--radius-lg);
  padding: 60px;
  text-align: center;
  margin: 80px 0;
}

.seo-cta-box h3 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
}

.seo-cta-box p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.seo-tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  margin: 40px 0;
}

.seo-tip-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 28px;
}

.seo-tip-card h4 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.seo-tip-card h4 svg {
  width: 20px;
  height: 20px;
  color: var(--brand-red);
  flex-shrink: 0;
}

.seo-tip-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ─── 响应式 ─── */
@media (max-width: 768px) {
  .navbar-nav {
    gap: 20px;
  }

  .nav-link {
    font-size: 13px;
  }

  .navbar-cta {
    display: none;
  }

  .hero h1 {
    font-size: 40px;
    letter-spacing: -1px;
  }

  .section-title {
    font-size: 28px;
  }

  .features-grid,
  .platforms-grid {
    grid-template-columns: 1fr;
  }

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

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

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

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

  .steps {
    flex-direction: column;
  }

  .step::after {
    display: none;
  }

  .download-main {
    padding: 40px 24px;
  }

  .download-meta-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .hero-meta {
    flex-wrap: wrap;
    gap: 12px;
  }

  .cta-banner-inner {
    padding: 48px 24px;
  }

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

  .comparison-table-wrap,
  .sysreq-table-wrap {
    margin: 0 -24px;
    border-radius: 0;
  }
}

@media (max-width: 480px) {
  .navbar-nav {
    gap: 12px;
  }

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

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

/* ─── 滚动显示动画 ─── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* ─── 下载按钮 Loading ─── */
.btn-loading {
  pointer-events: none;
  opacity: 0.8;
}