/* ========== 全局重置与基础设置 ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #10b981;
  --primary-dark: #059669;
  --primary-light: #34d399;
  --primary-lighter: #6ee7b7;
  --primary-bg: #ecfdf5;
  --secondary: #0ea5e9;
  --accent: #14b8a6;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --shadow-sm: 0 1px 3px rgba(16, 185, 129, 0.08);
  --shadow-md: 0 4px 16px rgba(16, 185, 129, 0.1);
  --shadow-lg: 0 12px 32px rgba(16, 185, 129, 0.15);
  --gradient-primary: linear-gradient(135deg, #10b981 0%, #14b8a6 50%, #0ea5e9 100%);
  --gradient-soft: linear-gradient(135deg, #ecfdf5 0%, #f0fdfa 100%);
  --gradient-hero: linear-gradient(135deg, #10b981 0%, #0ea5e9 100%);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
  color: var(--text-primary);
  background: var(--bg-page);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--primary-dark);
}

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

/* ========== 导航栏 ========== */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}

.logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 10px;
}

.nav-links {
  display: flex;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 15px;
  transition: all 0.2s;
}

.nav-links a:hover {
  background: var(--primary-bg);
  color: var(--primary-dark);
}

.nav-links a.active {
  color: var(--primary-dark);
  background: var(--primary-bg);
}

.nav-cta {
  background: var(--gradient-primary);
  color: white !important;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: white !important;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-primary);
}

/* ========== 通用容器 ========== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-sm {
  padding: 48px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 48px;
}

.section-title h2 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.section-title p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.section-title .accent-line {
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 2px;
  margin: 16px auto 0;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  border: none;
  cursor: pointer;
  transition: all 0.25s;
  text-decoration: none;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: white;
}

.btn-secondary {
  background: white;
  color: var(--primary-dark);
  border: 2px solid var(--primary);
}

.btn-secondary:hover {
  background: var(--primary-bg);
  color: var(--primary-dark);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary-dark);
}

/* ========== 卡片 ========== */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all 0.3s;
}

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

/* ========== Hero 区 ========== */
.hero {
  padding: 100px 0 80px;
  background: var(--gradient-soft);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -200px;
  left: -200px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-content {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.1);
  color: var(--primary-dark);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}

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

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

.hero-desc {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.7;
}

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

.hero-stats {
  display: flex;
  gap: 40px;
}

.hero-stat {
  display: flex;
  flex-direction: column;
}

.hero-stat-num {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary-dark);
}

.hero-stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.phone-mockup {
  position: relative;
  width: 280px;
  height: 560px;
  background: var(--text-primary);
  border-radius: 36px;
  padding: 12px;
  box-shadow: 0 30px 60px rgba(16, 185, 129, 0.25);
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  border-radius: 28px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  padding: 40px 24px;
  text-align: center;
}

.phone-notch {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 90px;
  height: 22px;
  background: var(--text-primary);
  border-radius: 0 0 14px 14px;
}

.phone-screen .app-icon {
  width: 80px;
  height: 80px;
  border-radius: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 42px;
  margin-bottom: 20px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  overflow: hidden;
}

.phone-screen .app-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 22px;
}

.phone-screen h3 {
  font-size: 22px;
  margin-bottom: 8px;
}

.phone-screen p {
  font-size: 14px;
  opacity: 0.9;
}

.phone-floating {
  position: absolute;
  background: white;
  border-radius: var(--radius-md);
  padding: 12px 16px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  animation: float 4s ease-in-out infinite;
}

.phone-floating-1 {
  top: 15%;
  left: -30px;
  animation-delay: 0s;
}

.phone-floating-2 {
  bottom: 20%;
  right: -40px;
  animation-delay: 1.5s;
}

.phone-floating-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

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

/* ========== 特性网格 ========== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border);
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-primary);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.3s;
}

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

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

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--gradient-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 20px;
  color: var(--primary-dark);
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

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

/* ========== 关于插件区块 ========== */
.about-plugin {
  background: var(--gradient-soft);
}

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

.plugin-text h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 16px;
}

.plugin-text p {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 20px;
}

.plugin-features {
  list-style: none;
  margin-top: 24px;
}

.plugin-features li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  font-size: 15px;
  color: var(--text-secondary);
}

.plugin-features li::before {
  content: '✓';
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}

.plugin-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.plugin-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  max-width: 380px;
  width: 100%;
  border-top: 4px solid;
  border-image: var(--gradient-primary) 1;
}

.plugin-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.plugin-card-icon {
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: white;
}

.plugin-card-title {
  font-size: 16px;
  font-weight: 700;
}

.plugin-card-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.plugin-info-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  font-size: 14px;
}

.plugin-info-row span:first-child {
  color: var(--text-muted);
}

.plugin-info-row span:last-child {
  color: var(--text-primary);
  font-weight: 600;
}

/* ========== 步骤指示器 ========== */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.step-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border);
  position: relative;
  transition: all 0.3s;
}

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

.step-num {
  width: 48px;
  height: 48px;
  background: var(--gradient-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  margin: 0 auto 16px;
}

.step-card h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ========== 安装流程区 ========== */
.install-page {
  background: var(--gradient-soft);
  min-height: 100vh;
  padding: 60px 0;
}

.device-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: var(--shadow-lg);
  max-width: 800px;
  margin: 0 auto;
}

.brand-tabs {
  display: flex;
  gap: 8px;
  background: var(--primary-bg);
  padding: 6px;
  border-radius: var(--radius-md);
  margin-bottom: 32px;
}

.brand-tab {
  flex: 1;
  padding: 10px 16px;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.brand-tab.active {
  background: white;
  color: var(--primary-dark);
  box-shadow: var(--shadow-sm);
}

.steps-list {
  counter-reset: step;
  list-style: none;
}

.steps-list li {
  position: relative;
  padding: 20px 20px 20px 64px;
  background: var(--bg-page);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  counter-increment: step;
  border-left: 3px solid var(--primary);
}

.steps-list li::before {
  content: counter(step);
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
}

.steps-list li strong {
  display: block;
  margin-bottom: 4px;
  color: var(--text-primary);
  font-size: 15px;
}

.steps-list li span {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.warning-box {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border-left: 4px solid #f59e0b;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin-top: 24px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.warning-box-icon {
  font-size: 22px;
  flex-shrink: 0;
}

.warning-box-content {
  font-size: 14px;
  color: #92400e;
  line-height: 1.6;
}

.warning-box-content strong {
  display: block;
  margin-bottom: 4px;
  color: #78350f;
}

.error-box {
  background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
  border-left: 4px solid #ef4444;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin-top: 24px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.error-box-icon {
  font-size: 22px;
  flex-shrink: 0;
}

.error-box-content {
  font-size: 14px;
  color: #991b1b;
  line-height: 1.6;
}

.error-box-content strong {
  display: block;
  margin-bottom: 4px;
  color: #7f1d1d;
}

/* ========== 激活进度 ========== */
.progress-container {
  background: white;
  border-radius: var(--radius-xl);
  padding: 48px;
  box-shadow: var(--shadow-lg);
  max-width: 600px;
  margin: 32px auto;
  text-align: center;
}

.progress-circle {
  width: 120px;
  height: 120px;
  margin: 0 auto 24px;
  position: relative;
}

.progress-circle svg {
  transform: rotate(-90deg);
}

.progress-circle-bg {
  fill: none;
  stroke: var(--primary-bg);
  stroke-width: 8;
}

.progress-circle-fill {
  fill: none;
  stroke: url(#progressGradient);
  stroke-width: 8;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.5s ease;
}

.progress-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 32px;
  font-weight: 700;
  color: var(--primary-dark);
}

.progress-steps {
  text-align: left;
  margin: 32px 0;
}

.progress-step {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  font-size: 14px;
  color: var(--text-muted);
  transition: all 0.3s;
}

.progress-step.active {
  color: var(--text-primary);
  font-weight: 600;
}

.progress-step.done {
  color: var(--primary-dark);
}

.progress-step-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.progress-step.done .progress-step-icon {
  background: var(--primary);
  color: white;
}

.progress-step.active .progress-step-icon {
  background: var(--primary-lighter);
  color: var(--primary-dark);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
  50% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
}

/* ========== 成功页 ========== */
.success-page {
  min-height: 100vh;
  background: var(--gradient-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  position: relative;
  overflow: hidden;
}

.success-page::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  top: -200px;
  right: -200px;
  animation: floatSlow 8s ease-in-out infinite;
}

.success-page::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  bottom: -100px;
  left: -100px;
  animation: floatSlow 10s ease-in-out infinite reverse;
}

@keyframes floatSlow {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(20px, -20px); }
}

.success-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: 60px 48px;
  box-shadow: var(--shadow-lg);
  text-align: center;
  max-width: 560px;
  width: 100%;
  position: relative;
  z-index: 1;
  animation: scaleIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes scaleIn {
  0% { opacity: 0; transform: scale(0.8); }
  100% { opacity: 1; transform: scale(1); }
}

.success-icon {
  width: 100px;
  height: 100px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 50px;
  color: white;
  box-shadow: 0 10px 30px rgba(16, 185, 129, 0.3);
  position: relative;
  animation: bounceIn 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) 0.2s both;
}

@keyframes bounceIn {
  0% { transform: scale(0); }
  60% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.success-icon::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 2px solid var(--primary);
  animation: ripple 2s ease-out infinite;
}

@keyframes ripple {
  0% { transform: scale(1); opacity: 1; }
  100% { transform: scale(1.5); opacity: 0; }
}

.success-card h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
  animation: fadeIn 0.6s 0.4s both;
}

.success-card p {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 32px;
  animation: fadeIn 0.6s 0.5s both;
}

@keyframes fadeIn {
  0% { opacity: 0; transform: translateY(10px); }
  100% { opacity: 1; transform: translateY(0); }
}

.success-info {
  background: var(--primary-bg);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  text-align: left;
  animation: fadeIn 0.6s 0.6s both;
}

.success-info-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.success-info-label {
  font-size: 12px;
  color: var(--text-muted);
}

.success-info-value {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
}

.success-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeIn 0.6s 0.7s both;
}

.success-tips {
  margin-top: 32px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  text-align: left;
  animation: fadeIn 0.6s 0.8s both;
}

.success-tips h4 {
  font-size: 14px;
  color: var(--text-primary);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.success-tips ul {
  list-style: none;
}

.success-tips li {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
}

.success-tips li::before {
  content: '•';
  position: absolute;
  left: 8px;
  color: var(--primary);
  font-weight: 700;
}

.success-beian {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 12px;
  color: var(--text-muted);
  animation: fadeIn 0.6s 0.9s both;
}

.success-beian a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.success-beian a:hover {
  color: var(--primary-dark);
}

.success-beian .beian-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* ========== 下载区块 ========== */
.download-section {
  background: var(--gradient-soft);
}

.download-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.download-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  border: 1px solid var(--border);
  transition: all 0.3s;
}

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

.download-icon {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-md);
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
}

.download-icon.android {
  background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
  color: var(--primary-dark);
}

.download-icon.ios {
  background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
  color: #1d4ed8;
}

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

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

.qr-code {
  width: 140px;
  height: 140px;
  background: var(--bg-page);
  border-radius: var(--radius-sm);
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--text-muted);
  border: 1px solid var(--border);
  background-image: 
    linear-gradient(45deg, var(--text-primary) 25%, transparent 25%),
    linear-gradient(-45deg, var(--text-primary) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--text-primary) 75%),
    linear-gradient(-45deg, transparent 75%, var(--text-primary) 75%);
  background-size: 12px 12px;
  background-position: 0 0, 0 6px, 6px -6px, -6px 0;
}

/* ========== 风险提醒区块 ========== */
.risk-section {
  background: white;
}

.risk-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.risk-card {
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-page);
  transition: all 0.3s;
}

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

.risk-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--gradient-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 16px;
}

.risk-card h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

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

.risk-card.warning {
  background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
  border-color: #fed7aa;
}

.risk-card.warning .risk-icon {
  background: #f97316;
  color: white;
}

.risk-card.danger {
  background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
  border-color: #fecaca;
}

.risk-card.danger .risk-icon {
  background: #ef4444;
  color: white;
}

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

.faq-item {
  background: white;
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all 0.3s;
}

.faq-item.open {
  box-shadow: var(--shadow-sm);
  border-color: var(--primary-lighter);
}

.faq-question {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-primary);
  user-select: none;
}

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

.faq-toggle {
  font-size: 20px;
  color: var(--primary);
  transition: transform 0.3s;
  flex-shrink: 0;
  margin-left: 12px;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}

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

/* ========== 页脚 ========== */
.footer {
  background: var(--text-primary);
  color: rgba(255, 255, 255, 0.8);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: white;
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 16px;
  max-width: 320px;
}

.footer-contact {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-col h4 {
  color: white;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 8px;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  transition: color 0.2s;
}

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

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom p {
  margin: 6px 0;
}

.footer-beian {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 10px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
}

.footer-beian a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  transition: color 0.2s;
}

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

.footer-beian .beian-icon {
  width: 14px;
  height: 14px;
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
}

/* ========== 响应式 ========== */
@media (max-width: 968px) {
  .hero-content,
  .plugin-intro {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero h1 {
    font-size: 36px;
  }

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

  .hero-visual {
    order: -1;
  }

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

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

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

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

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .mobile-toggle {
    display: block;
  }

  .section {
    padding: 60px 0;
  }

  .hero {
    padding: 60px 0;
  }

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

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

  .hero-stats {
    gap: 24px;
  }

  .hero-stat-num {
    font-size: 22px;
  }

  .phone-mockup {
    width: 220px;
    height: 440px;
  }

  .phone-floating {
    display: none;
  }

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

  .device-card,
  .progress-container,
  .success-card {
    padding: 32px 24px;
  }

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

  .success-info {
    grid-template-columns: 1fr;
  }

  .brand-tabs {
    flex-wrap: wrap;
  }

  .brand-tab {
    flex-basis: 48%;
  }
}

/* ========== 移动端导航菜单 ========== */
.mobile-menu {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  background: white;
  border-bottom: 1px solid var(--border);
  padding: 20px 24px;
  box-shadow: var(--shadow-md);
  z-index: 99;
}

.mobile-menu.open {
  display: block;
}

.mobile-menu a {
  display: block;
  padding: 12px 0;
  color: var(--text-primary);
  font-weight: 500;
  border-bottom: 1px solid var(--border);
}

.mobile-menu a:last-child {
  border-bottom: none;
}

/* ========== 滚动动画 ========== */
.fade-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}