/* ===== 首页样式 ===== */
.hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 40px 60px;
  gap: 60px;
}

.hero-content {
  flex: 1;
  min-width: 320px;
}

.hero-logo {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  margin-bottom: 28px;
}

.hero-logo h1 {
  font-size: 42px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-top: 12px;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  margin-top: 8px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-visual {
  flex: 1;
  min-width: 320px;
  display: flex;
  justify-content: center;
}

.hero-canvas {
  position: relative;
  width: 380px;
  height: 280px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 16px;
}

.node {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition);
}

.node:hover {
  border-color: var(--primary);
  transform: scale(1.05);
}

.node-connections {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.6;
}

/* ===== 功能展示 ===== */
.features {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 40px;
  text-align: center;
}

.features h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 40px;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: var(--transition);
}

.feature-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(99, 102, 241, 0.15);
}

.feature-icon {
  font-size: 36px;
  margin-bottom: 14px;
}

.feature-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

/* ===== CTA 区域 ===== */
.cta {
  max-width: 800px;
  margin: 0 auto;
  padding: 60px 40px;
  text-align: center;
}

.cta h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 14px;
}

.cta p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

#download-widget-container {
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== 页脚 ===== */
.footer {
  text-align: center;
  padding: 30px 20px;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 13px;
}

/* ===== 认证页面通用 ===== */
.auth-container {
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 40px 32px;
  box-shadow: var(--shadow);
}

.auth-header {
  text-align: center;
  margin-bottom: 28px;
}

.auth-header h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 12px 0 4px;
}

.auth-header p {
  font-size: 14px;
  color: var(--text-secondary);
}

.auth-form .form-group {
  margin-bottom: 16px;
}

.auth-form label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text-secondary);
}

.auth-form input {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 14px;
  transition: var(--transition);
  outline: none;
}

.auth-form input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.auth-form input::placeholder {
  color: #5A5A70;
}

/* ===== 验证码输入 ===== */
.code-input-wrap {
  display: flex;
  gap: 10px;
}

.code-input-wrap input {
  flex: 1;
}

.btn-code {
  flex-shrink: 0;
  padding: 12px 16px;
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-code:hover:not(:disabled) {
  background: var(--primary);
  color: #fff;
}

.btn-code:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ===== 认证页脚 ===== */
.auth-footer {
  text-align: center;
  margin-top: 20px;
  font-size: 14px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.auth-footer a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

.auth-footer a:hover {
  text-decoration: underline;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .hero {
    padding: 60px 20px 40px;
    flex-direction: column;
    gap: 40px;
  }

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

  .hero-visual {
    width: 100%;
  }

  .hero-canvas {
    width: 100%;
    max-width: 320px;
    height: 240px;
  }

  .features, .cta {
    padding: 40px 20px;
  }

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

  .auth-container {
    padding: 32px 20px;
  }

  .code-input-wrap {
    flex-direction: column;
  }
}