/*
Theme Name: KLWIN 康林旺专业建站主题
Theme URI: https://www.tnol.cn/
Author: KLWIN 康林旺
Author URI: https://www.tnol.cn/
Description: KLWIN - 高端大气专业网站开发CMS模板，支持SEO TDK后台配置、QQ联系弹窗、留言插件。专业网站开发、各种CMS小旋风程序模板开发、插件开发。
Version: 1.1.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: tnol
Tags: one-column, custom-menu, featured-images, theme-options, translation-ready
*/

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

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #3b82f6;
  --secondary: #0f172a;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --text: #334155;
  --text-light: #64748b;
  --text-dark: #0f172a;
  --bg: #ffffff;
  --bg-light: #f8fafc;
  --bg-dark: #0f172a;
  --border: #e2e8f0;
  --shadow: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,.1), 0 8px 10px -6px rgba(0,0,0,.1);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ============================================
   Header / Navigation
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.site-header.scrolled {
  box-shadow: var(--shadow);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.site-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--secondary);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 2px;
  text-decoration: none;
}
.site-logo img {
  height: 36px;
  width: auto;
}
.site-logo span { color: var(--primary); }

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 8px;
}
.main-nav a {
  display: block;
  padding: 8px 18px;
  color: var(--text);
  font-weight: 500;
  font-size: .95rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.main-nav a:hover,
.main-nav a.active {
  color: var(--primary);
  background: rgba(37,99,235,.08);
}

.header-cta .btn {
  padding: 10px 24px;
  font-size: .9rem;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--secondary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 14px rgba(37,99,235,.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37,99,235,.5);
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}
.btn-accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  box-shadow: 0 4px 14px rgba(245,158,11,.4);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245,158,11,.5);
  color: #fff;
}
.btn-white {
  background: #fff;
  color: var(--primary);
  box-shadow: var(--shadow);
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--primary-dark);
}
.btn-lg { padding: 16px 40px; font-size: 1.1rem; }
.btn-sm { padding: 8px 20px; font-size: .85rem; }

/* ============================================
   Hero Section
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 30%, #bfdbfe 60%, #93c5fd 100%);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(37,99,235,.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: heroFloat 8s ease-in-out infinite;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(245,158,11,.1) 0%, transparent 70%);
  border-radius: 50%;
  animation: heroFloat 10s ease-in-out infinite reverse;
}

@keyframes heroFloat {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-30px) scale(1.05); }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(255,255,255,.8);
  border: 1px solid rgba(37,99,235,.2);
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}
.hero h1 {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.15;
  color: var(--secondary);
  margin-bottom: 20px;
  letter-spacing: -1px;
}
.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: 1.2rem;
  color: var(--text-light);
  margin-bottom: 36px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.hero-stats {
  display: flex;
  gap: 48px;
  justify-content: center;
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid rgba(37,99,235,.15);
}
.hero-stat {
  text-align: center;
}
.hero-stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
}
.hero-stat-label {
  font-size: .85rem;
  color: var(--text-light);
  margin-top: 4px;
}

/* ============================================
   Section Common
   ============================================ */
.section {
  padding: 100px 0;
}
.section-dark {
  background: var(--bg-dark);
  color: #fff;
}
.section-dark .section-subtitle { color: rgba(255,255,255,.6); }
.section-dark .feature-card { background: rgba(255,255,255,.05); border-color: rgba(255,255,255,.1); }
.section-dark .feature-card h3 { color: #fff; }
.section-dark .feature-card p { color: rgba(255,255,255,.7); }

.section-header {
  text-align: center;
  margin-bottom: 60px;
}
.section-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(37,99,235,.1);
  color: var(--primary);
  border-radius: 50px;
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}
.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--secondary);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* ============================================
   Features / Advantages
   ============================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  padding: 36px 28px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  transform: scaleX(0);
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}
.feature-card:hover::before { transform: scaleX(1); }

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(37,99,235,.1), rgba(37,99,235,.05));
  border-radius: var(--radius-sm);
  font-size: 1.5rem;
  margin-bottom: 20px;
}
.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 10px;
}
.feature-card p {
  font-size: .95rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ============================================
   BT Panel (宝塔面板) Section
   ============================================ */
.bt-section {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  position: relative;
  overflow: hidden;
}
.bt-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 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='%23ffffff' fill-opacity='0.03'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.bt-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.bt-text h2 {
  font-size: 2.5rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 20px;
}
.bt-text p {
  font-size: 1.1rem;
  color: rgba(255,255,255,.7);
  margin-bottom: 32px;
  line-height: 1.8;
}
.bt-features {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
}
.bt-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 50px;
  color: rgba(255,255,255,.9);
  font-size: .85rem;
  font-weight: 500;
}

.bt-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}
.bt-card {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 20px;
  padding: 40px;
  text-align: center;
  backdrop-filter: blur(20px);
  max-width: 400px;
  width: 100%;
}
.bt-card-icon {
  font-size: 4rem;
  margin-bottom: 20px;
}
.bt-card h3 {
  font-size: 1.5rem;
  color: #fff;
  font-weight: 700;
  margin-bottom: 12px;
}
.bt-card p {
  color: rgba(255,255,255,.6);
  margin-bottom: 24px;
}
.bt-card .price-tag {
  display: inline-block;
  padding: 12px 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  border-radius: var(--radius-sm);
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 20px;
}

/* ============================================
   Templates Showcase
   ============================================ */
.templates-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.template-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.template-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}
.template-preview {
  height: 220px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.template-preview::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 60%, rgba(0,0,0,.3));
}
.template-preview-text {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  z-index: 2;
  padding: 16px 28px;
  background: rgba(0,0,0,.2);
  border-radius: var(--radius-sm);
  backdrop-filter: blur(10px);
}

.template-card:nth-child(2) .template-preview {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}
.template-card:nth-child(3) .template-preview {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.template-info {
  padding: 24px;
}
.template-info h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 8px;
}
.template-info p {
  font-size: .9rem;
  color: var(--text-light);
  margin-bottom: 16px;
}
.template-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.template-meta span {
  font-size: .8rem;
  color: var(--text-light);
}

/* ============================================
   Pricing / Membership
   ============================================ */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.pricing-card {
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  text-align: center;
  transition: var(--transition);
  position: relative;
}
.pricing-card.featured {
  border-color: var(--primary);
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
}
.pricing-card.featured::before {
  content: '推荐';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 20px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: .75rem;
  font-weight: 700;
  border-radius: 50px;
}
.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}
.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-4px);
}

.pricing-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}
.pricing-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 8px;
}
.pricing-price {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--primary);
  margin: 20px 0;
}
.pricing-price span {
  font-size: .9rem;
  font-weight: 400;
  color: var(--text-light);
}
.pricing-features {
  list-style: none;
  margin: 24px 0;
  text-align: left;
}
.pricing-features li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: .9rem;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
}
.pricing-features li::before {
  content: '✓';
  color: var(--primary);
  font-weight: 700;
}

/* ============================================
   Testimonials
   ============================================ */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.testimonial-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
}
.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.testimonial-stars {
  color: var(--accent);
  font-size: 1.1rem;
  margin-bottom: 16px;
}
.testimonial-text {
  font-size: .95rem;
  color: var(--text);
  line-height: 1.8;
  margin-bottom: 20px;
  font-style: italic;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
}
.testimonial-info h4 {
  font-size: .95rem;
  font-weight: 700;
  color: var(--secondary);
}
.testimonial-info p {
  font-size: .8rem;
  color: var(--text-light);
}

/* ============================================
   Partners
   ============================================ */
.partners-row {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
}
.partner-item {
  padding: 20px 36px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-light);
  transition: var(--transition);
  text-decoration: none;
}
.partner-item:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* ============================================
   Stats Counter
   ============================================ */
.stats-section {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  padding: 60px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}
.stat-item h3 {
  font-size: 2.8rem;
  font-weight: 900;
  color: #fff;
}
.stat-item p {
  font-size: .95rem;
  color: rgba(255,255,255,.8);
  margin-top: 4px;
}

/* ============================================
   Contact Section
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.contact-info-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px;
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
}
.contact-info-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(37,99,235,.1), rgba(37,99,235,.05));
  border-radius: var(--radius-sm);
  font-size: 1.2rem;
  flex-shrink: 0;
}
.contact-info-card h4 {
  font-size: .9rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 4px;
}
.contact-info-card p {
  font-size: .9rem;
  color: var(--text-light);
}

/* Contact Form */
.contact-form {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow);
}
.contact-form h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 24px;
}
.form-group {
  margin-bottom: 18px;
}
.form-group label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 6px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .95rem;
  color: var(--text);
  background: var(--bg);
  transition: var(--transition);
  font-family: inherit;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}
.form-group textarea {
  resize: vertical;
  min-height: 120px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-submit {
  width: 100%;
  margin-top: 8px;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,.7);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-brand h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: .9rem;
  line-height: 1.7;
  margin-bottom: 20px;
}
.footer-social {
  display: flex;
  gap: 12px;
}
.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,.1);
  border-radius: 50%;
  color: rgba(255,255,255,.7);
  transition: var(--transition);
}
.footer-social a:hover {
  background: var(--primary);
  color: #fff;
}
.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-col ul {
  list-style: none;
}
.footer-col li {
  margin-bottom: 10px;
}
.footer-col a {
  color: rgba(255,255,255,.6);
  font-size: .9rem;
  transition: var(--transition);
}
.footer-col a:hover {
  color: var(--primary-light);
  padding-left: 4px;
}
.footer-bottom {
  text-align: center;
  padding: 24px 0;
  margin-top: 0;
  font-size: .85rem;
  color: rgba(255,255,255,.4);
}

/* ============================================
   QQ Floating Button & Popup
   ============================================ */
.qq-float {
  position: fixed;
  right: 24px;
  bottom: 120px;
  z-index: 9999;
}
.qq-float-btn {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #12B7F5, #0d9bd4);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(18,183,245,.5);
  transition: var(--transition);
  animation: qqPulse 2s infinite;
  border: none;
  color: #fff;
  font-size: 1.6rem;
  font-weight: 700;
}
.qq-float-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 28px rgba(18,183,245,.6);
}
@keyframes qqPulse {
  0%, 100% { box-shadow: 0 4px 20px rgba(18,183,245,.5); }
  50% { box-shadow: 0 4px 30px rgba(18,183,245,.8), 0 0 0 10px rgba(18,183,245,.1); }
}

.qq-popup {
  display: none;
  position: fixed;
  right: 24px;
  bottom: 190px;
  width: 300px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0,0,0,.2);
  z-index: 10000;
  overflow: hidden;
  animation: popupSlide .3s ease;
}
.qq-popup.active { display: block; }

@keyframes popupSlide {
  from { opacity: 0; transform: translateY(10px) scale(.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.qq-popup-header {
  background: linear-gradient(135deg, #12B7F5, #0d9bd4);
  padding: 20px;
  text-align: center;
  color: #fff;
}
.qq-popup-header h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.qq-popup-header p {
  font-size: .85rem;
  opacity: .9;
}
.qq-popup-body {
  padding: 24px 20px;
  text-align: center;
}
.qq-popup-body .qq-number {
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--secondary);
  margin-bottom: 8px;
  letter-spacing: 2px;
}
.qq-popup-body .qq-hint {
  font-size: .85rem;
  color: var(--text-light);
  margin-bottom: 20px;
}
.qq-popup-body .btn {
  width: 100%;
  margin-bottom: 10px;
}
.qq-popup-close {
  position: absolute;
  top: 10px;
  right: 14px;
  background: none;
  border: none;
  color: rgba(255,255,255,.8);
  font-size: 1.3rem;
  cursor: pointer;
  line-height: 1;
}
.qq-popup-close:hover { color: #fff; }

/* Toast notification */
.toast {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 16px 32px;
  background: rgba(0,0,0,.8);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-weight: 600;
  z-index: 99999;
  opacity: 0;
  transition: opacity .3s;
  pointer-events: none;
}
.toast.show { opacity: 1; }

/* Back to top */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 50px;
  width: 44px;
  height: 44px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow);
  color: var(--text);
  font-size: 1.2rem;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}
.back-to-top:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  .features-grid,
  .templates-grid,
  .pricing-grid,
  .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
  .bt-content { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .pricing-card.featured { transform: scale(1); }
  .pricing-card.featured:hover { transform: translateY(-4px); }
}

@media (max-width: 768px) {
  html { font-size: 15px; }
  .mobile-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,.98);
    backdrop-filter: blur(20px);
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }
  .main-nav.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .main-nav ul {
    flex-direction: column;
    gap: 4px;
  }
  .header-cta { display: none; }
  .hero h1 { font-size: 2.2rem; }
  .hero-stats { flex-direction: column; gap: 20px; }
  .section { padding: 60px 0; }
  .section-title { font-size: 1.8rem; }
  .features-grid,
  .templates-grid,
  .pricing-grid,
  .testimonials-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .footer-brand {
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255,255,255,.1);
    margin-bottom: 0;
  }
  .footer-col {
    border-bottom: 1px solid rgba(255,255,255,.08);
  }
  .footer-col h4 {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    margin: 0;
    cursor: pointer;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
  }
  .footer-col h4::after {
    content: '+';
    font-size: 1.2rem;
    font-weight: 400;
    transition: transform .3s ease;
    color: rgba(255,255,255,.5);
  }
  .footer-col.active h4::after {
    content: '−';
  }
  .footer-col ul {
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease, padding .35s ease;
    padding: 0;
  }
  .footer-col.active ul {
    max-height: 300px;
    padding-bottom: 16px;
  }
  .footer-col li {
    margin-bottom: 0;
  }
  .footer-col a {
    display: block;
    padding: 8px 0;
  }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .bt-text h2 { font-size: 1.8rem; }
  .partners-row { gap: 20px; }
  .qq-popup { right: 10px; width: calc(100% - 20px); max-width: 300px; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.8rem; }
  .hero-buttons { flex-direction: column; }
  .btn { width: 100%; }
  .form-row { grid-template-columns: 1fr; }
}

/* ============================================
   Animations
   ============================================ */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.slide-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity .6s ease, transform .6s ease;
}
.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}
.slide-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity .6s ease, transform .6s ease;
}
.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}