/* ============================================
   Safew 官方网站 - 全局样式
   主题：极暗紫夜 (Midnight Violet)
   ============================================ */

/* ---------- CSS 变量：极暗紫夜调色盘 ---------- */
:root {
  /* 主色 - 紫罗兰 */
  --color-primary: #8B5CF6;
  --color-primary-dark: #7C3AED;
  --color-primary-light: rgba(139, 92, 246, 0.15);

  /* 强调色 - 品红紫 */
  --color-accent: #D946EF;
  --color-accent-dark: #C026D3;
  --color-accent-light: rgba(217, 70, 239, 0.15);

  /* 文字色（深色主题下为浅色） */
  --color-dark: #EDE9FE;
  --color-dark-2: #C4BDE0;
  --color-dark-3: #A5A2C4;
  --color-gray: #8B85AD;
  --color-gray-light: #6B6890;

  /* 背景色（深色主题下为深紫） */
  --color-border: rgba(139, 92, 246, 0.18);
  --color-bg: #0D0B1A;
  --color-bg-alt: #141127;
  --color-white: #1A1630;

  /* 功能色 */
  --color-success: #34D399;
  --color-warning: #FBBF24;

  /* 点缀色 */
  --color-cyan: #22D3EE;

  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #D946EF 100%);
  --gradient-hero: linear-gradient(180deg, #0D0B1A 0%, #12101F 100%);
  --gradient-text: linear-gradient(135deg, #A78BFA 0%, #E879F9 100%);

  --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.45);
  --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.55);
  --shadow-primary: 0 8px 32px rgba(139, 92, 246, 0.35);
  --shadow-glow: 0 0 48px rgba(139, 92, 246, 0.25);

  --container-max: 1200px;
  --nav-height: 72px;

  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-dark-2);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

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

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-dark);
}

/* ---------- 通用容器 ---------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

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

.section-dark {
  background: #080614;
  color: var(--color-dark);
}

.section-dark h1, .section-dark h2, .section-dark h3 {
  color: var(--color-dark);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(139, 92, 246, 0.5);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--color-dark);
  border-color: rgba(139, 92, 246, 0.4);
}

.btn-outline:hover {
  background: rgba(139, 92, 246, 0.1);
  border-color: var(--color-primary);
  color: var(--color-dark);
}

.btn-outline-dark {
  background: transparent;
  color: var(--color-dark);
  border-color: var(--color-border);
}

.btn-outline-dark:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-light);
  background: var(--color-primary-light);
}

.btn-ghost {
  background: var(--color-primary-light);
  color: var(--color-primary-light);
}

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

.btn-lg {
  padding: 18px 40px;
  font-size: 18px;
}

.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
}

/* ---------- 导航栏 ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(13, 11, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.4);
  background: rgba(13, 11, 26, 0.95);
}

.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--color-dark);
  text-decoration: none;
}

.nav-logo:hover {
  color: var(--color-dark);
}

.logo-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

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

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

.nav-link {
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-dark-3);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.nav-link:hover {
  color: var(--color-primary-light);
  background: var(--color-primary-light);
}

.nav-link.active {
  color: var(--color-primary-light);
  background: var(--color-primary-light);
  font-weight: 600;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* ---------- Hero 区域 ---------- */
.hero {
  padding: calc(var(--nav-height) + 80px) 0 80px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.18) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -150px;
  left: -150px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(217, 70, 239, 0.12) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 560px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: var(--color-primary-light);
  color: var(--color-primary-light);
  border: 1px solid rgba(139, 92, 246, 0.3);
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-badge .dot {
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: pulse 2s infinite;
  box-shadow: 0 0 12px rgba(139, 92, 246, 0.6);
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.2); }
}

.hero h1 {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  color: var(--color-dark);
}

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

.hero-desc {
  font-size: 18px;
  color: var(--color-dark-3);
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero-stats {
  display: flex;
  gap: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.hero-stat .num {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-dark);
  line-height: 1;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat .label {
  font-size: 14px;
  color: var(--color-gray);
  margin-top: 6px;
}

.hero-image {
  position: relative;
}

.hero-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl), 0 0 80px rgba(139, 92, 246, 0.2);
}

.hero-image .float-card {
  position: absolute;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  animation: float 3s ease-in-out infinite;
}

.hero-image .float-card:nth-child(2) {
  top: 10%;
  left: -30px;
  animation-delay: 0s;
}

.hero-image .float-card:nth-child(3) {
  bottom: 15%;
  right: -20px;
  animation-delay: 1.5s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.float-card .icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.float-card .icon svg {
  width: 20px;
  height: 20px;
}

.float-card .text strong {
  display: block;
  font-size: 14px;
  color: var(--color-dark);
}

.float-card .text small {
  font-size: 12px;
  color: var(--color-gray);
}

/* ---------- 区块标题 ---------- */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--color-primary-light);
  color: var(--color-primary-light);
  border: 1px solid rgba(139, 92, 246, 0.25);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.section-header h2 {
  font-size: 40px;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.section-header p {
  font-size: 17px;
  color: var(--color-gray);
  line-height: 1.8;
}

/* ---------- 功能卡片网格 ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg), 0 0 40px rgba(139, 92, 246, 0.15);
  border-color: rgba(139, 92, 246, 0.4);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

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

.feature-icon.blue {
  background: rgba(139, 92, 246, 0.15);
  color: #A78BFA;
}

.feature-icon.teal {
  background: rgba(217, 70, 239, 0.15);
  color: #E879F9;
}

.feature-icon.purple {
  background: rgba(139, 92, 246, 0.2);
  color: #C4B5FD;
}

.feature-icon.orange {
  background: rgba(251, 191, 36, 0.15);
  color: #FCD34D;
}

.feature-icon.green {
  background: rgba(52, 211, 153, 0.15);
  color: #6EE7B7;
}

.feature-icon.pink {
  background: rgba(244, 114, 182, 0.15);
  color: #F9A8D4;
}

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

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

/* ---------- 图文展示区 ---------- */
.showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.showcase.reverse .showcase-image {
  order: 2;
}

.showcase-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl), 0 0 60px rgba(139, 92, 246, 0.15);
}

.showcase-content .section-tag {
  margin-bottom: 20px;
}

.showcase-content h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.25;
  color: var(--color-dark);
}

.showcase-content > p {
  font-size: 16px;
  color: var(--color-gray);
  line-height: 1.8;
  margin-bottom: 28px;
}

.showcase-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.showcase-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: var(--color-dark-2);
}

.showcase-list li .check {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(139, 92, 246, 0.2);
  color: #A78BFA;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.showcase-list li .check svg {
  width: 12px;
  height: 12px;
}

/* ---------- 数据统计区 ---------- */
.stats-band {
  background: linear-gradient(135deg, #080614 0%, #12101F 100%);
  padding: 72px 0;
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.stats-band::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.2) 0%, transparent 70%);
  border-radius: 50%;
}

.stats-band::after {
  content: '';
  position: absolute;
  bottom: -50%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(217, 70, 239, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  position: relative;
  z-index: 1;
}

.stat-item {
  text-align: center;
}

.stat-item .num {
  font-size: 48px;
  font-weight: 800;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 10px;
}

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

/* ---------- CTA 区域 ---------- */
.cta-section {
  padding: 96px 0;
  text-align: center;
}

.cta-box {
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  padding: 72px 48px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(139, 92, 246, 0.35);
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}

.cta-box::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 250px;
  height: 250px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}

.cta-box h2 {
  font-size: 36px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-box p {
  font-size: 17px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 32px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
}

.cta-box .btn {
  position: relative;
  z-index: 1;
}

.cta-box .btn-outline {
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
}

/* ---------- 页脚 ---------- */
.footer {
  background: #060410;
  color: var(--color-gray);
  padding: 72px 0 32px;
  border-top: 1px solid var(--color-border);
}

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

.footer-brand .nav-logo {
  color: var(--color-dark);
  margin-bottom: 16px;
}

.footer-brand .nav-logo:hover {
  color: var(--color-dark);
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 20px;
  max-width: 280px;
  color: var(--color-gray);
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(139, 92, 246, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(139, 92, 246, 0.4);
}

.footer-social svg {
  width: 18px;
  height: 18px;
  fill: var(--color-dark-3);
}

.footer-social a:hover svg {
  fill: #fff;
}

.footer-col h4 {
  color: var(--color-dark);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 20px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  color: var(--color-gray);
  font-size: 14px;
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: var(--color-primary-light);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--color-gray-light);
}

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

.footer-bottom-links a {
  font-size: 13px;
  color: var(--color-gray-light);
}

.footer-bottom-links a:hover {
  color: var(--color-primary-light);
}

/* ---------- 下载页面样式 ---------- */
.page-hero {
  padding: calc(var(--nav-height) + 64px) 0 64px;
  background: var(--gradient-hero);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
}

.page-hero h1 {
  font-size: 44px;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--color-dark);
  position: relative;
}

.page-hero p {
  font-size: 18px;
  color: var(--color-gray);
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

.download-platforms {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

.platform-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.platform-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), 0 0 32px rgba(139, 92, 246, 0.2);
  border-color: rgba(139, 92, 246, 0.5);
}

.platform-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
}

.platform-icon svg {
  width: 32px;
  height: 32px;
  color: #A78BFA;
}

.platform-card h3 {
  font-size: 18px;
  margin-bottom: 6px;
  color: var(--color-dark);
}

.platform-card .version {
  font-size: 13px;
  color: var(--color-gray);
  margin-bottom: 16px;
}

.platform-card .size {
  font-size: 12px;
  color: var(--color-gray-light);
  margin-bottom: 20px;
}

.platform-card .btn {
  width: 100%;
  padding: 12px;
  font-size: 14px;
}

.download-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  padding: 48px 0;
}

.download-feature {
  text-align: center;
  padding: 0 16px;
}

.download-feature .icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  color: #E879F9;
}

.download-feature .icon svg {
  width: 24px;
  height: 24px;
}

.download-feature h4 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--color-dark);
}

.download-feature p {
  font-size: 14px;
  color: var(--color-gray);
}

/* 系统要求表格 */
.system-requirements {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-top: 48px;
}

.system-requirements h3 {
  font-size: 22px;
  margin-bottom: 24px;
  text-align: center;
  color: var(--color-dark);
}

.req-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.req-table th, .req-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
  color: var(--color-dark-2);
}

.req-table th {
  background: var(--color-bg-alt);
  font-weight: 600;
  color: var(--color-dark);
}

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

.req-table td:first-child {
  font-weight: 600;
  color: var(--color-dark);
  width: 25%;
}

/* ---------- FAQ 页面样式 ---------- */
.faq-search {
  max-width: 600px;
  margin: 0 auto 48px;
  position: relative;
}

.faq-search input {
  width: 100%;
  padding: 16px 24px 16px 52px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 16px;
  transition: all var(--transition-fast);
  background: var(--color-white);
  color: var(--color-dark);
}

.faq-search input::placeholder {
  color: var(--color-gray-light);
}

.faq-search input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.15);
}

.faq-search .search-icon {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-light);
}

.faq-search .search-icon svg {
  width: 20px;
  height: 20px;
}

.faq-categories {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.faq-cat-btn {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-dark-3);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.faq-cat-btn:hover, .faq-cat-btn.active {
  background: var(--gradient-primary);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(139, 92, 246, 0.35);
}

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

.faq-item {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: rgba(139, 92, 246, 0.4);
}

.faq-question {
  width: 100%;
  padding: 22px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-dark);
  text-align: left;
  gap: 16px;
}

.faq-question .arrow {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-fast);
  color: var(--color-gray);
}

.faq-question .arrow svg {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.faq-item.open .faq-question .arrow {
  background: var(--gradient-primary);
  color: #fff;
}

.faq-item.open .faq-question .arrow svg {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

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

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

.faq-answer-inner ul {
  padding-left: 20px;
  list-style: disc;
  margin-bottom: 12px;
}

.faq-answer-inner li {
  margin-bottom: 6px;
}

.faq-answer-inner a {
  color: var(--color-primary-light);
  font-weight: 500;
}

/* 帮助中心侧边布局 */
.help-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
  align-items: start;
}

.help-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 24px);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.help-sidebar h3 {
  font-size: 16px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-dark);
}

.help-sidebar ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.help-sidebar a {
  display: block;
  padding: 10px 14px;
  font-size: 14px;
  color: var(--color-dark-3);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.help-sidebar a:hover, .help-sidebar a.active {
  background: var(--color-primary-light);
  color: var(--color-primary-light);
}

/* ---------- 机器人页面样式 ---------- */
.robot-hero {
  padding: calc(var(--nav-height) + 80px) 0 80px;
  background: linear-gradient(180deg, #060410 0%, #0D0B1A 100%);
  color: var(--color-dark);
  position: relative;
  overflow: hidden;
}

.robot-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(139, 92, 246, 0.2) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(217, 70, 239, 0.15) 0%, transparent 50%);
}

.robot-hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.robot-hero h1 {
  font-size: 48px;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 20px;
  line-height: 1.2;
}

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

.robot-hero p {
  font-size: 17px;
  color: var(--color-dark-3);
  line-height: 1.8;
  margin-bottom: 32px;
}

.robot-hero-image img {
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5), 0 0 80px rgba(139, 92, 246, 0.25);
}

.robot-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.robot-feature {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.robot-feature .icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(139, 92, 246, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.robot-feature .icon svg {
  width: 20px;
  height: 20px;
  color: #A78BFA;
}

.robot-feature h4 {
  font-size: 15px;
  color: var(--color-dark);
  margin-bottom: 4px;
}

.robot-feature p {
  font-size: 13px;
  color: var(--color-gray);
  margin: 0;
  line-height: 1.6;
}

/* 机器人使用场景 */
.robot-scenarios {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.scenario-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), 0 0 32px rgba(139, 92, 246, 0.15);
  border-color: rgba(139, 92, 246, 0.4);
}

.scenario-image {
  height: 180px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.15), rgba(217, 70, 239, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.scenario-image .scenario-icon {
  width: 72px;
  height: 72px;
  background: var(--color-white);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.scenario-image .scenario-icon svg {
  width: 36px;
  height: 36px;
  color: var(--color-primary);
}

.scenario-content {
  padding: 28px;
}

.scenario-content h3 {
  font-size: 19px;
  margin-bottom: 10px;
  color: var(--color-dark);
}

.scenario-content p {
  font-size: 14px;
  color: var(--color-gray);
  line-height: 1.7;
  margin-bottom: 16px;
}

.scenario-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.scenario-tag {
  padding: 4px 12px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 12px;
  color: var(--color-gray);
}

/* 机器人对话演示 */
.chat-demo {
  background: #080614;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 40px;
  max-width: 700px;
  margin: 0 auto;
}

.chat-demo-title {
  text-align: center;
  color: var(--color-gray);
  font-size: 14px;
  margin-bottom: 24px;
  opacity: 0.7;
}

.chat-messages {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.chat-msg {
  display: flex;
  gap: 12px;
  max-width: 85%;
}

.chat-msg.user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.chat-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 14px;
  font-weight: 700;
}

.chat-msg.bot .chat-avatar {
  background: var(--gradient-primary);
  color: white;
}

.chat-msg.user .chat-avatar {
  background: #312E54;
  color: var(--color-dark-3);
}

.chat-bubble {
  padding: 14px 18px;
  border-radius: 16px;
  font-size: 14px;
  line-height: 1.7;
}

.chat-msg.bot .chat-bubble {
  background: rgba(139, 92, 246, 0.12);
  color: var(--color-dark-2);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-bottom-left-radius: 4px;
}

.chat-msg.user .chat-bubble {
  background: var(--gradient-primary);
  color: white;
  border-bottom-right-radius: 4px;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-gray);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--color-gray);
}

.breadcrumb a:hover {
  color: var(--color-primary-light);
}

.breadcrumb .sep {
  color: var(--color-gray-light);
}

.breadcrumb .current {
  color: var(--color-dark);
  font-weight: 500;
}

/* ---------- 回到顶部 ---------- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-primary);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  z-index: 999;
  border: none;
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(139, 92, 246, 0.5);
}

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

/* ---------- 滚动揭示动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-inner, .showcase, .robot-hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .showcase.reverse .showcase-image {
    order: 0;
  }

  .hero-content {
    max-width: 100%;
    text-align: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

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

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

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

  .footer-brand {
    grid-column: 1 / -1;
  }

  .help-layout {
    grid-template-columns: 1fr;
  }

  .help-sidebar {
    position: static;
  }

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

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }

  .nav-links, .nav-cta .btn {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    padding: 20px 24px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    gap: 4px;
  }

  .nav-links.open .nav-link {
    padding: 14px 16px;
    width: 100%;
  }

  .hero {
    padding: calc(var(--nav-height) + 48px) 0 48px;
  }

  .hero h1 {
    font-size: 34px;
  }

  .hero-desc {
    font-size: 16px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
    align-items: center;
  }

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

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

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .stat-item .num {
    font-size: 36px;
  }

  .cta-box {
    padding: 48px 24px;
  }

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

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

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

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

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

  .system-requirements {
    padding: 24px;
  }

  .req-table {
    font-size: 13px;
  }

  .req-table th, .req-table td {
    padding: 10px 8px;
  }

  .chat-demo {
    padding: 24px;
  }

  .hero-image .float-card {
    display: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

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

  .btn {
    padding: 12px 24px;
    font-size: 15px;
  }

  .btn-lg {
    padding: 14px 28px;
    font-size: 16px;
  }

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

/* ---------- 减少动画偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}