/* ========================================
   杭州长仁科技有限公司 - 四种主题样式 (Premium Edition)
   ======================================== */

/* ========== 主题变量定义 ========== */
:root {
  /* 字体定义 */
  --font-display: 'Noto Serif SC', 'Source Han Serif SC', serif;
  --font-body: 'Noto Sans SC', 'Source Han Sans SC', sans-serif;

  /* 通用变量 */
  --border-radius: 8px;
  --border-radius-lg: 16px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 20px 50px -12px rgba(0, 0, 0, 0.15);
  --glow-primary: 0 0 20px rgba(26, 54, 93, 0.15);
  --glow-accent: 0 0 20px rgba(237, 137, 54, 0.2);
}

/* ========== 风格A：专业稳重 (Professional) ========== */
[data-theme="professional"] {
  --primary: #1a365d;
  --primary-light: #2c5282;
  --primary-dark: #0d1b2a;
  --secondary: #4a5568;
  --accent: #ed8936;
  --accent-light: #f6ad55;
  --background: #f7fafc;
  --background-alt: #edf2f7;
  --surface: #ffffff;
  --text-primary: #2d3748;
  --text-secondary: #718096;
  --text-light: #a0aec0;
  --border: #e2e8f0;
  --gradient-start: #1a365d;
  --gradient-end: #2c5282;

  --font-display: 'Noto Serif SC', serif;
  --font-body: 'Noto Sans SC', sans-serif;

  --shadow-color: rgba(26, 54, 93, 0.1);
  --card-bg: #ffffff;
  --nav-bg: rgba(255, 255, 255, 0.95);
}

/* 风格A - 导航栏 */
[data-theme="professional"] .navbar {
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
}

[data-theme="professional"] .nav-link {
  color: var(--text-primary);
  font-weight: 500;
}

[data-theme="professional"] .nav-link:hover {
  color: var(--primary);
}

[data-theme="professional"] .logo-text {
  color: var(--primary);
  font-family: var(--font-display);
  font-weight: 700;
}

[data-theme="professional"] .logo-icon {
  color: var(--primary);
}

[data-theme="professional"] .footer .logo-icon {
  color: #ffffff;
}

/* 风格A - Hero区域 */
[data-theme="professional"] .hero {
  background: linear-gradient(160deg, #0d1b2a 0%, #1a365d 30%, #2c5282 70%, #1a365d 100%);
  color: #ffffff;
  position: relative;
  overflow: hidden;
}

[data-theme="professional"] .hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(237, 137, 54, 0.08) 0%, transparent 50%),
              radial-gradient(ellipse at 80% 20%, rgba(44, 82, 130, 0.15) 0%, transparent 50%);
  pointer-events: none;
}

[data-theme="professional"] .hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Ccircle cx='20' cy='20' r='1'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

[data-theme="professional"] .hero-title {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 700;
  color: #ffffff;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

[data-theme="professional"] .hero-subtitle {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.25rem;
}

[data-theme="professional"] .btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #dd6b20 100%);
  color: #ffffff;
  border: none;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(237, 137, 54, 0.3);
  position: relative;
  overflow: hidden;
}

[data-theme="professional"] .btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

[data-theme="professional"] .btn-primary:hover::before {
  left: 100%;
}

[data-theme="professional"] .btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(237, 137, 54, 0.4);
}

[data-theme="professional"] .btn-secondary {
  background: transparent;
  color: #ffffff;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

[data-theme="professional"] .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #ffffff;
}

/* 风格A - 卡片 */
[data-theme="professional"] .card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

[data-theme="professional"] .card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary-light));
  opacity: 0;
  transition: var(--transition);
}

[data-theme="professional"] .card:hover {
  box-shadow: var(--shadow-xl), var(--glow-primary);
  transform: translateY(-6px);
  border-color: transparent;
}

[data-theme="professional"] .card:hover::before {
  opacity: 1;
}

[data-theme="professional"] .card-icon {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(26, 54, 93, 0.25);
}

/* 风格A - 服务区块 */
[data-theme="professional"] .section-title {
  color: var(--primary);
  font-family: var(--font-display);
}

[data-theme="professional"] .section-subtitle {
  color: var(--text-secondary);
}

/* 风格A - 底部 */
[data-theme="professional"] .footer {
  background: linear-gradient(180deg, #0d1b2a 0%, #0a1628 100%);
  color: rgba(255, 255, 255, 0.75);
  position: relative;
}

[data-theme="professional"] .footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(237, 137, 54, 0.3), var(--primary-light), rgba(237, 137, 54, 0.3), transparent);
}

[data-theme="professional"] .footer-title {
  color: #ffffff;
  position: relative;
  display: inline-block;
}

[data-theme="professional"] .footer-title::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

/* 风格A - 表单 */
[data-theme="professional"] .form-control {
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  padding: 12px 16px;
  transition: var(--transition);
}

[data-theme="professional"] .form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26, 54, 93, 0.08), 0 0 12px rgba(26, 54, 93, 0.05);
}

/* ========== 风格B：科技现代 (Tech Modern) ========== */
[data-theme="tech"] {
  --primary: #667eea;
  --primary-light: #764ba2;
  --primary-dark: #1a1a2e;
  --secondary: #00d4ff;
  --accent: #00d4ff;
  --accent-light: #7c3aed;
  --background: #0f0f1a;
  --background-alt: #1a1a2e;
  --surface: #16213e;
  --text-primary: #ffffff;
  --text-secondary: #a0aec0;
  --text-light: #718096;
  --border: rgba(102, 126, 234, 0.3);
  --gradient-start: #667eea;
  --gradient-end: #764ba2;

  --font-display: 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', sans-serif;

  --shadow-color: rgba(102, 126, 234, 0.2);
  --card-bg: rgba(22, 33, 62, 0.8);
  --nav-bg: rgba(15, 15, 26, 0.9);
}

/* 风格B - 背景效果 */
[data-theme="tech"] body {
  background: var(--background);
  color: var(--text-primary);
}

[data-theme="tech"] .hero {
  background: linear-gradient(160deg, #0a0a15 0%, #1a1a2e 30%, #667eea 70%, #764ba2 100%);
  position: relative;
  overflow: hidden;
}

[data-theme="tech"] .hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 30%, rgba(102, 126, 234, 0.15) 0%, transparent 50%);
  pointer-events: none;
}

[data-theme="tech"] .hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%2300d4ff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

[data-theme="tech"] .hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  background: linear-gradient(90deg, #ffffff, var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
}

[data-theme="tech"] .hero-subtitle {
  color: rgba(255, 255, 255, 0.8);
  font-size: 1.25rem;
}

/* 风格B - 导航栏 */
[data-theme="tech"] .navbar {
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

[data-theme="tech"] .nav-link {
  color: var(--text-primary);
  font-weight: 500;
  letter-spacing: 0.5px;
}

[data-theme="tech"] .nav-link:hover {
  color: var(--secondary);
  text-shadow: 0 0 10px var(--secondary);
}

[data-theme="tech"] .logo-text {
  color: #ffffff;
  font-weight: 700;
  text-shadow: 0 0 20px var(--primary);
}

[data-theme="tech"] .logo-icon {
  color: var(--secondary);
  filter: drop-shadow(0 0 8px var(--secondary));
}

[data-theme="tech"] .footer .logo-icon {
  color: #ffffff;
}

/* 风格B - 按钮 */
[data-theme="tech"] .btn-primary {
  background: linear-gradient(90deg, var(--secondary), var(--primary));
  color: #0f0f1a;
  border: none;
  font-weight: 700;
  position: relative;
  overflow: hidden;
}

[data-theme="tech"] .btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: 0.5s;
}

[data-theme="tech"] .btn-primary:hover::before {
  left: 100%;
}

[data-theme="tech"] .btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.5);
}

[data-theme="tech"] .btn-secondary {
  background: transparent;
  color: #ffffff;
  border: 2px solid var(--secondary);
}

[data-theme="tech"] .btn-secondary:hover {
  background: rgba(0, 212, 255, 0.1);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

/* 风格B - 卡片 */
[data-theme="tech"] .card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--border-radius-lg);
  backdrop-filter: blur(10px);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

[data-theme="tech"] .card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--secondary), var(--primary), var(--secondary));
  opacity: 0;
  transition: var(--transition);
}

[data-theme="tech"] .card:hover {
  border-color: var(--secondary);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.2), 0 10px 40px rgba(0, 0, 0, 0.3);
  transform: translateY(-8px);
}

[data-theme="tech"] .card:hover::before {
  opacity: 1;
}

[data-theme="tech"] .card-icon {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #0f0f1a;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

/* 风格B - 标题 */
[data-theme="tech"] .section-title {
  color: #ffffff;
  text-shadow: 0 0 30px rgba(102, 126, 234, 0.5);
}

[data-theme="tech"] .section-subtitle {
  color: var(--text-secondary);
}

/* 风格B - 底部 */
[data-theme="tech"] .footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.7);
}

/* 风格B - 表单 */
[data-theme="tech"] .form-control {
  background: rgba(22, 33, 62, 0.8);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  color: #ffffff;
  padding: 12px 16px;
}

[data-theme="tech"] .form-control:focus {
  border-color: var(--secondary);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.2);
  outline: none;
}

[data-theme="tech"] .form-control::placeholder {
  color: var(--text-light);
}

/* ========== 风格C：温暖亲和 (Warm Friendly) ========== */
[data-theme="warm"] {
  --primary: #ed8936;
  --primary-light: #f6ad55;
  --primary-dark: #c05621;
  --secondary: #38b2ac;
  --accent: #38b2ac;
  --accent-light: #4fd1c5;
  --background: #fffaf0;
  --background-alt: #feebc8;
  --surface: #ffffff;
  --text-primary: #4a5568;
  --text-secondary: #718096;
  --text-light: #a0aec0;
  --border: #fbd38d;
  --gradient-start: #ed8936;
  --gradient-end: #f6ad55;

  --font-display: 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', sans-serif;

  --shadow-color: rgba(237, 137, 54, 0.15);
  --card-bg: #ffffff;
  --nav-bg: rgba(255, 255, 255, 0.98);

  --border-radius: 16px;
  --border-radius-lg: 24px;
}

/* 风格C - 背景 */
[data-theme="warm"] body {
  background: var(--background);
  color: var(--text-primary);
}

[data-theme="warm"] .hero {
  background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
  color: #ffffff;
  border-radius: 0 0 50% 50% / 0 0 20% 20%;
}

[data-theme="warm"] .hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  color: #ffffff;
}

[data-theme="warm"] .hero-subtitle {
  color: rgba(255, 255, 255, 0.95);
  font-size: 1.25rem;
}

/* 风格C - 导航栏 */
[data-theme="warm"] .navbar {
  background: var(--nav-bg);
  border-bottom: none;
}

[data-theme="warm"] .nav-link {
  color: var(--text-primary);
  font-weight: 500;
  border-radius: 20px;
  padding: 8px 16px;
  transition: var(--transition);
}

[data-theme="warm"] .nav-link:hover {
  color: var(--primary);
  background: rgba(237, 137, 54, 0.1);
}

[data-theme="warm"] .logo-text {
  color: var(--primary);
  font-weight: 700;
}

[data-theme="warm"] .logo-icon {
  color: var(--primary);
}

[data-theme="warm"] .footer .logo-icon {
  color: #ffffff;
}

/* 风格C - 按钮 */
[data-theme="warm"] .btn-primary {
  background: var(--accent);
  color: #ffffff;
  border: none;
  border-radius: 25px;
  font-weight: 600;
  padding: 14px 32px;
}

[data-theme="warm"] .btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(56, 178, 172, 0.4);
}

[data-theme="warm"] .btn-secondary {
  background: transparent;
  color: #ffffff;
  border: 2px solid rgba(255, 255, 255, 0.6);
  border-radius: 25px;
}

[data-theme="warm"] .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: #ffffff;
}

/* 风格C - 卡片 */
[data-theme="warm"] .card {
  background: var(--surface);
  border: none;
  border-radius: var(--border-radius-lg);
  box-shadow: 0 4px 20px var(--shadow-color);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

[data-theme="warm"] .card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary-light));
  opacity: 0;
  transition: var(--transition);
}

[data-theme="warm"] .card:hover {
  box-shadow: 0 12px 40px rgba(237, 137, 54, 0.2), 0 4px 20px rgba(0, 0, 0, 0.08);
  transform: translateY(-8px);
}

[data-theme="warm"] .card:hover::before {
  opacity: 1;
}

[data-theme="warm"] .card-icon {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #ffffff;
  border-radius: 50%;
  width: 70px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}

/* 风格C - 标题 */
[data-theme="warm"] .section-title {
  color: var(--text-primary);
}

[data-theme="warm"] .section-subtitle {
  color: var(--text-secondary);
}

/* 风格C - 底部 */
[data-theme="warm"] .footer {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: rgba(255, 255, 255, 0.9);
}

/* 风格C - 表单 */
[data-theme="warm"] .form-control {
  border: 2px solid var(--border);
  border-radius: var(--border-radius);
  padding: 14px 18px;
  background: #ffffff;
}

[data-theme="warm"] .form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(237, 137, 54, 0.1);
  outline: none;
}

/* ========== 风格D：简洁高效 (Clean Efficient) ========== */
[data-theme="clean"] {
  --primary: #3182ce;
  --primary-light: #63b3ed;
  --primary-dark: #2c5282;
  --secondary: #38a169;
  --accent: #38a169;
  --accent-light: #48bb78;
  --background: #ffffff;
  --background-alt: #f7fafc;
  --surface: #ffffff;
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-light: #718096;
  --border: #e2e8f0;
  --gradient-start: #3182ce;
  --gradient-end: #63b3ed;

  --font-display: 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', sans-serif;

  --shadow-color: rgba(49, 130, 206, 0.1);
  --card-bg: #ffffff;
  --nav-bg: rgba(255, 255, 255, 0.98);

  --border-radius: 4px;
  --border-radius-lg: 8px;
}

/* 风格D - 背景 */
[data-theme="clean"] body {
  background: var(--background);
  color: var(--text-primary);
  line-height: 1.8;
}

[data-theme="clean"] .hero {
  background: linear-gradient(135deg, var(--gradient-start) 0%, var(--gradient-end) 100%);
  color: #ffffff;
}

[data-theme="clean"] .hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -1px;
}

[data-theme="clean"] .hero-subtitle {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.25rem;
}

/* 风格D - 导航栏 */
[data-theme="clean"] .navbar {
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
  box-shadow: none;
}

[data-theme="clean"] .nav-link {
  color: var(--text-primary);
  font-weight: 500;
  padding: 8px 20px;
  border-radius: var(--border-radius);
  transition: all 0.2s ease;
}

[data-theme="clean"] .nav-link:hover {
  color: var(--primary);
  background: rgba(49, 130, 206, 0.05);
}

[data-theme="clean"] .logo-text {
  color: var(--primary);
  font-weight: 700;
  letter-spacing: -0.5px;
}

[data-theme="clean"] .logo-icon {
  color: var(--primary);
}

[data-theme="clean"] .footer .logo-icon {
  color: #ffffff;
}

/* 风格D - 按钮 */
[data-theme="clean"] .btn-primary {
  background: var(--accent);
  color: #ffffff;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  padding: 12px 28px;
  transition: all 0.2s ease;
}

[data-theme="clean"] .btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(56, 161, 105, 0.3);
}

[data-theme="clean"] .btn-secondary {
  background: transparent;
  color: #ffffff;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: var(--border-radius);
}

[data-theme="clean"] .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #ffffff;
}

/* 风格D - 卡片 */
[data-theme="clean"] .card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--border-radius-lg);
  box-shadow: none;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

[data-theme="clean"] .card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
  opacity: 0;
  transition: var(--transition);
}

[data-theme="clean"] .card:hover {
  border-color: var(--primary-light);
  box-shadow: 0 4px 20px rgba(49, 130, 206, 0.08), 0 1px 3px rgba(0, 0, 0, 0.05);
  transform: translateY(-2px);
}

[data-theme="clean"] .card:hover::before {
  opacity: 1;
}

[data-theme="clean"] .card-icon {
  background: rgba(49, 130, 206, 0.1);
  color: var(--primary);
}

/* 风格D - 标题 */
[data-theme="clean"] .section-title {
  color: var(--text-primary);
  font-weight: 700;
  letter-spacing: -0.5px;
}

[data-theme="clean"] .section-subtitle {
  color: var(--text-secondary);
}

/* 风格D - 底部 */
[data-theme="clean"] .footer {
  background: var(--background-alt);
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
}

/* 风格D - 表单 */
[data-theme="clean"] .form-control {
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  padding: 12px 16px;
  transition: all 0.2s ease;
}

[data-theme="clean"] .form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.1);
  outline: none;
}

/* ========== 主题切换按钮样式 ========== */
.theme-switcher {
  display: flex;
  gap: 8px;
  padding: 6px;
  background: rgba(128, 128, 128, 0.1);
  border-radius: 30px;
}

.theme-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.theme-btn:hover {
  transform: scale(1.1);
}

.theme-btn.active {
  border-color: currentColor;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.5);
}

.theme-btn[data-theme="professional"] {
  background: #1a365d;
  color: #1a365d;
}

.theme-btn[data-theme="tech"] {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: #667eea;
}

.theme-btn[data-theme="warm"] {
  background: linear-gradient(135deg, #ed8936, #f6ad55);
  color: #ed8936;
}

.theme-btn[data-theme="clean"] {
  background: #3182ce;
  color: #3182ce;
}

/* 深色主题下的切换器 */
[data-theme="tech"] .theme-switcher {
  background: rgba(255, 255, 255, 0.1);
}

[data-theme="tech"] .theme-btn.active {
  border-color: #00d4ff;
  box-shadow: 0 0 0 2px rgba(0, 212, 255, 0.3);
}

/* ========== 站内搜索主题适配 ========== */
[data-theme="tech"] .search-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--secondary);
}

[data-theme="tech"] .search-overlay {
  background: rgba(0, 0, 0, 0.7);
}

[data-theme="tech"] .search-modal {
  background: var(--card-bg);
  border: 1px solid var(--border);
}

[data-theme="tech"] .search-close:hover {
  color: var(--secondary);
  background: rgba(255, 255, 255, 0.1);
}

[data-theme="warm"] .search-toggle:hover {
  background: rgba(237, 137, 54, 0.1);
  color: var(--primary);
}

[data-theme="warm"] .search-modal {
  border-radius: var(--border-radius-lg);
}

[data-theme="clean"] .search-toggle:hover {
  background: rgba(49, 130, 206, 0.05);
  color: var(--primary);
}

[data-theme="clean"] .search-modal {
  border-radius: var(--border-radius-lg);
}

/* ========== 面包屑主题适配 ========== */
[data-theme="professional"] .breadcrumb-nav {
  background: var(--background-alt);
}

[data-theme="tech"] .breadcrumb-nav {
  background: var(--primary-dark);
  border-bottom-color: var(--border);
}

[data-theme="tech"] .breadcrumb__text {
  color: rgba(255, 255, 255, 0.6);
}

[data-theme="tech"] .breadcrumb__item:not(:last-child)::after {
  color: rgba(255, 255, 255, 0.4);
}

[data-theme="warm"] .breadcrumb-nav {
  background: var(--background-alt);
  border-bottom-color: var(--border);
}

[data-theme="clean"] .breadcrumb-nav {
  background: var(--background-alt);
  border-bottom-color: var(--border);
}