:root {
  --bg-base: #f4f7fb;
  --bg-card: #ffffff;
  --text-main: #0f172a;
  --text-sub: #475569;
  --text-light: #64748b;
  --neon-blue: #00d2ff;
  --neon-purple: #7a5cff;
  --neon-pink: #ff3366;
  --neon-green: #00e676;
  --gradient-neon: linear-gradient(135deg, #00d2ff, #7a5cff);
  --shadow-neon: 0 10px 30px rgba(0, 210, 255, 0.12), 0 10px 20px rgba(122, 92, 255, 0.08);
  --shadow-card: 0 4px 20px rgba(15, 23, 42, 0.06);
  --radius: 16px;
  --container-width: 1200px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-base);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: color 0.3s; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
.container { max-width: var(--container-width); margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(244, 247, 251, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  transition: all 0.3s;
}
.site-header.scrolled { background: rgba(255,255,255,0.95); box-shadow: 0 4px 20px rgba(0,0,0,0.05); }
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.logo-area { display: flex; align-items: center; gap: 12px; }
.logo-area img { height: 36px; width: auto; }
.logo-text { font-size: 20px; font-weight: 700; background: var(--gradient-neon); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.nav-menu { display: flex; gap: 28px; align-items: center; }
.nav-menu a { font-size: 15px; color: var(--text-sub); font-weight: 500; position: relative; }
.nav-menu a:hover { color: var(--neon-purple); }
.nav-menu a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
  background: var(--gradient-neon); transition: width 0.3s;
}
.nav-menu a:hover::after { width: 100%; }
.header-btn {
  padding: 8px 20px; border-radius: 20px; font-size: 14px; font-weight: 600;
  background: var(--text-main); color: #fff; border: none; cursor: pointer;
  transition: all 0.3s;
}
.header-btn:hover { box-shadow: 0 0 15px rgba(122, 92, 255, 0.4); transform: translateY(-2px); }
.mobile-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-main); }

/* Hero */
.hero-section {
  padding: 140px 0 80px;
  position: relative;
  overflow: hidden;
  min-height: 90vh;
  display: flex;
  align-items: center;
}
.hero-glow {
  position: absolute; border-radius: 50%; filter: blur(120px); opacity: 0.35; z-index: 0; pointer-events: none;
  animation: floatGlow 8s ease-in-out infinite alternate;
}
.glow-1 { width: 500px; height: 500px; background: var(--neon-blue); top: -150px; left: -100px; }
.glow-2 { width: 600px; height: 600px; background: var(--neon-purple); bottom: -200px; right: -150px; animation-delay: 2s; }
.glow-3 { width: 400px; height: 400px; background: var(--neon-pink); top: 40%; left: 50%; transform: translate(-50%, -50%); opacity: 0.15; animation-delay: 4s; }
@keyframes floatGlow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(30px, -30px) scale(1.1); }
}
.hero-content { position: relative; z-index: 1; text-align: center; max-width: 800px; margin: 0 auto; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px; border-radius: 20px;
  background: rgba(255,255,255,0.8); border: 1px solid rgba(0, 210, 255, 0.3);
  font-size: 13px; color: var(--neon-purple); font-weight: 600;
  margin-bottom: 24px; box-shadow: 0 4px 12px rgba(0,210,255,0.1);
}
.hero-badge span { width: 8px; height: 8px; border-radius: 50%; background: var(--neon-green); box-shadow: 0 0 8px var(--neon-green); }
.hero-title {
  font-size: 48px; font-weight: 800; line-height: 1.2; margin-bottom: 20px;
  color: var(--text-main);
}
.hero-title em {
  font-style: normal; position: relative;
}
.hero-title em::after {
  content: ''; position: absolute; bottom: 4px; left: 0; width: 100%; height: 12px;
  background: linear-gradient(90deg, rgba(0,210,255,0.3), rgba(122,92,255,0.3));
  z-index: -1; border-radius: 4px;
}
.hero-desc { font-size: 18px; color: var(--text-sub); margin-bottom: 36px; max-width: 600px; margin-left: auto; margin-right: auto; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-primary {
  padding: 14px 32px; border-radius: 12px; font-size: 16px; font-weight: 600;
  background: var(--text-main); color: #fff; border: none; cursor: pointer;
  transition: all 0.3s; display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 10px 25px rgba(15,23,42,0.2), 0 0 20px rgba(122,92,255,0.3); }
.btn-secondary {
  padding: 14px 32px; border-radius: 12px; font-size: 16px; font-weight: 600;
  background: #fff; color: var(--text-main); border: 2px solid rgba(0,0,0,0.08); cursor: pointer;
  transition: all 0.3s; display: inline-flex; align-items: center; gap: 8px;
}
.btn-secondary:hover { border-color: var(--neon-blue); color: var(--neon-purple); transform: translateY(-3px); box-shadow: var(--shadow-neon); }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  margin-top: 60px; position: relative; z-index: 1;
}
.stat-card {
  background: rgba(255,255,255,0.7); backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.8); border-radius: var(--radius);
  padding: 24px; text-align: center; transition: all 0.3s;
}
.stat-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-neon); border-color: rgba(0,210,255,0.3); }
.stat-num { font-size: 32px; font-weight: 800; background: var(--gradient-neon); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.stat-label { font-size: 14px; color: var(--text-light); margin-top: 4px; }

/* Sections Common */
.section { padding: 80px 0; position: relative; }
.section-alt { background: #fff; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-tag {
  display: inline-block; padding: 4px 14px; border-radius: 20px;
  background: rgba(122, 92, 255, 0.08); color: var(--neon-purple);
  font-size: 13px; font-weight: 600; margin-bottom: 12px;
}
.section-title { font-size: 36px; font-weight: 800; color: var(--text-main); margin-bottom: 12px; }
.section-desc { font-size: 16px; color: var(--text-sub); max-width: 600px; margin: 0 auto; }

/* About / Software Intro */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.about-img-wrap {
  border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-card); border: 4px solid #fff;
  position: relative;
}
.about-img-wrap::before {
  content: ''; position: absolute; inset: -4px; border-radius: 20px;
  background: var(--gradient-neon); z-index: -1; opacity: 0.5; filter: blur(15px);
}
.about-text h3 { font-size: 28px; font-weight: 700; margin-bottom: 16px; }
.about-text p { color: var(--text-sub); margin-bottom: 16px; font-size: 15px; }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 24px; }
.about-feat {
  display: flex; align-items: center; gap: 10px; padding: 12px;
  background: var(--bg-base); border-radius: 12px; font-size: 14px; font-weight: 500;
}
.about-feat .icon {
  width: 32px; height: 32px; border-radius: 8px; display: flex; align-items: center; justify-content: center;
  background: var(--gradient-neon); color: #fff; font-size: 16px; flex-shrink: 0;
}

/* Services / Models */
.model-cloud {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-bottom: 40px;
}
.model-tag {
  padding: 8px 18px; border-radius: 20px; background: #fff; border: 1px solid rgba(0,0,0,0.06);
  font-size: 14px; color: var(--text-sub); font-weight: 500; transition: all 0.3s;
}
.model-tag:hover { border-color: var(--neon-blue); color: var(--neon-purple); box-shadow: 0 4px 12px rgba(0,210,255,0.15); transform: translateY(-2px); }
.scene-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.scene-card {
  background: #fff; border-radius: var(--radius); padding: 28px 20px; text-align: center;
  border: 1px solid rgba(0,0,0,0.04); transition: all 0.4s; position: relative; overflow: hidden;
}
.scene-card::before {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px;
  background: var(--gradient-neon); transform: scaleX(0); transform-origin: left; transition: transform 0.4s;
}
.scene-card:hover::before { transform: scaleX(1); }
.scene-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-neon); }
.scene-icon {
  width: 56px; height: 56px; border-radius: 16px; margin: 0 auto 16px;
  background: linear-gradient(135deg, rgba(0,210,255,0.1), rgba(122,92,255,0.1));
  display: flex; align-items: center; justify-content: center; font-size: 28px;
}
.scene-card h4 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.scene-card p { font-size: 13px; color: var(--text-light); }

/* Process */
.process-timeline { position: relative; padding: 20px 0; }
.process-line {
  position: absolute; top: 40px; left: 50%; transform: translateX(-50%);
  width: 80%; height: 4px; background: linear-gradient(90deg, var(--neon-blue), var(--neon-purple), var(--neon-pink));
  border-radius: 2px; z-index: 0;
}
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; z-index: 1; }
.process-step { text-align: center; }
.step-dot {
  width: 80px; height: 80px; border-radius: 50%; background: #fff;
  border: 4px solid var(--neon-blue); margin: 0 auto 20px;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px; font-weight: 800; color: var(--neon-purple);
  box-shadow: 0 8px 20px rgba(0,210,255,0.2); transition: all 0.3s;
}
.process-step:hover .step-dot { transform: scale(1.1); box-shadow: 0 0 30px rgba(122,92,255,0.4); border-color: var(--neon-purple); }
.process-step h4 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.process-step p { font-size: 14px; color: var(--text-sub); }

/* Cases */
.cases-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; grid-template-rows: auto auto; gap: 20px; }
.case-item {
  border-radius: var(--radius); overflow: hidden; position: relative;
  background: #fff; box-shadow: var(--shadow-card); transition: all 0.4s;
}
.case-item:hover { transform: translateY(-5px); box-shadow: var(--shadow-neon); }
.case-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.case-item:hover img { transform: scale(1.05); }
.case-item.large { grid-row: span 2; }
.case-overlay {
  position: absolute; bottom: 0; left: 0; right: 0; padding: 20px;
  background: linear-gradient(transparent, rgba(15,23,42,0.8)); color: #fff;
}
.case-overlay h4 { font-size: 18px; font-weight: 600; }
.case-overlay p { font-size: 13px; opacity: 0.8; }

/* Compare */
.compare-wrap { background: #fff; border-radius: var(--radius); padding: 40px; box-shadow: var(--shadow-card); overflow-x: auto; }
.compare-table { width: 100%; border-collapse: collapse; min-width: 700px; }
.compare-table th, .compare-table td { padding: 16px 20px; text-align: center; border-bottom: 1px solid rgba(0,0,0,0.05); font-size: 15px; }
.compare-table th { background: var(--bg-base); font-weight: 700; color: var(--text-main); }
.compare-table th.highlight { background: linear-gradient(135deg, rgba(0,210,255,0.1), rgba(122,92,255,0.1)); color: var(--neon-purple); position: relative; }
.compare-table th.highlight::before {
  content: '推荐'; position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--gradient-neon); color: #fff; font-size: 12px; padding: 2px 12px; border-radius: 10px;
}
.compare-table td.highlight { background: rgba(122,92,255,0.03); font-weight: 600; color: var(--text-main); }
.compare-table tr:last-child td { border-bottom: none; }
.score-badge {
  display: inline-flex; align-items: center; gap: 6px; padding: 6px 16px;
  background: var(--gradient-neon); color: #fff; border-radius: 20px; font-weight: 700; font-size: 14px;
}
.stars { color: #fbbf24; letter-spacing: 2px; }

/* Training */
.training-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.train-card {
  background: #fff; border-radius: var(--radius); padding: 32px 24px;
  border: 1px solid rgba(0,0,0,0.04); transition: all 0.3s; position: relative; overflow: hidden;
}
.train-card::after {
  content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 4px;
  background: var(--gradient-neon); opacity: 0; transition: opacity 0.3s;
}
.train-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-neon); }
.train-card:hover::after { opacity: 1; }
.train-icon { font-size: 36px; margin-bottom: 16px; }
.train-card h4 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.train-card p { font-size: 14px; color: var(--text-sub); margin-bottom: 16px; }
.train-list { font-size: 13px; color: var(--text-light); }
.train-list li { padding: 4px 0; display: flex; align-items: center; gap: 8px; }
.train-list li::before { content: '✓'; color: var(--neon-green); font-weight: 700; }

/* Network & Standards */
.network-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.net-card {
  background: #fff; border-radius: var(--radius); padding: 32px;
  box-shadow: var(--shadow-card); border: 1px solid rgba(0,0,0,0.04);
}
.net-card h3 { font-size: 22px; font-weight: 700; margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.net-card h3 span { font-size: 24px; }
.net-card p { font-size: 15px; color: var(--text-sub); margin-bottom: 12px; }
.std-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 16px; }
.std-item {
  padding: 12px; background: var(--bg-base); border-radius: 12px; font-size: 14px; font-weight: 500;
  display: flex; align-items: center; gap: 8px;
}
.std-item::before { content: '◆'; color: var(--neon-blue); font-size: 10px; }

/* Reviews */
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.review-card {
  background: #fff; border-radius: var(--radius); padding: 28px;
  border: 1px solid rgba(0,0,0,0.04); transition: all 0.3s;
}
.review-card:hover { box-shadow: var(--shadow-neon); transform: translateY(-4px); }
.review-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.review-avatar {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--gradient-neon); display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 18px;
}
.review-info h5 { font-size: 16px; font-weight: 600; }
.review-info p { font-size: 13px; color: var(--text-light); }
.review-text { font-size: 14px; color: var(--text-sub); line-height: 1.7; }
.review-stars { color: #fbbf24; margin-top: 12px; font-size: 14px; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: #fff; border-radius: 12px; margin-bottom: 12px;
  border: 1px solid rgba(0,0,0,0.05); overflow: hidden; transition: all 0.3s;
}
.faq-item.active { border-color: rgba(0,210,255,0.3); box-shadow: 0 4px 15px rgba(0,210,255,0.1); }
.faq-q {
  padding: 20px 24px; font-size: 16px; font-weight: 600; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  transition: color 0.3s;
}
.faq-q:hover { color: var(--neon-purple); }
.faq-q .icon { font-size: 20px; transition: transform 0.3s; color: var(--neon-blue); }
.faq-item.active .faq-q .icon { transform: rotate(45deg); }
.faq-a {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px; font-size: 15px; color: var(--text-sub); line-height: 1.7;
}
.faq-item.active .faq-a { max-height: 200px; padding: 0 24px 20px; }

/* Articles */
.articles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.article-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  border: 1px solid rgba(0,0,0,0.04); transition: all 0.3s;
}
.article-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-neon); }
.article-body { padding: 24px; }
.article-body h4 { font-size: 18px; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
.article-body p { font-size: 14px; color: var(--text-light); margin-bottom: 12px; }
.article-link { font-size: 14px; color: var(--neon-purple); font-weight: 600; display: inline-flex; align-items: center; gap: 4px; }

/* Contact / Form */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.form-wrap {
  background: #fff; border-radius: var(--radius); padding: 36px;
  box-shadow: var(--shadow-card); border: 1px solid rgba(0,0,0,0.04);
}
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--text-main); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 16px; border: 1px solid rgba(0,0,0,0.1); border-radius: 10px;
  font-size: 15px; background: var(--bg-base); transition: all 0.3s; outline: none;
  font-family: inherit;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--neon-blue); box-shadow: 0 0 0 3px rgba(0,210,255,0.1); background: #fff;
}
.form-group textarea { min-height: 100px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-submit {
  width: 100%; padding: 14px; border: none; border-radius: 12px;
  background: var(--gradient-neon); color: #fff; font-size: 16px; font-weight: 700;
  cursor: pointer; transition: all 0.3s;
}
.form-submit:hover { transform: translateY(-2px); box-shadow: 0 10px 25px rgba(122,92,255,0.3); }
.contact-info { padding: 20px 0; }
.contact-info h3 { font-size: 28px; font-weight: 700; margin-bottom: 16px; }
.contact-info p { font-size: 15px; color: var(--text-sub); margin-bottom: 24px; }
.info-list { display: flex; flex-direction: column; gap: 16px; }
.info-item { display: flex; align-items: center; gap: 12px; font-size: 15px; }
.info-item .icon {
  width: 40px; height: 40px; border-radius: 10px; background: rgba(0,210,255,0.1);
  display: flex; align-items: center; justify-content: center; font-size: 18px; color: var(--neon-purple);
}

/* Footer */
.site-footer { background: #0f172a; color: #cbd5e1; padding: 60px 0 0; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand p { font-size: 14px; line-height: 1.7; margin-top: 12px; color: #94a3b8; }
.footer-col h5 { font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 14px; color: #94a3b8; transition: color 0.3s; }
.footer-col ul li a:hover { color: var(--neon-blue); }
.footer-links { padding: 20px 0; border-top: 1px solid rgba(255,255,255,0.08); border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-links h6 { font-size: 14px; color: #94a3b8; margin-bottom: 12px; }
.links-wrap { display: flex; flex-wrap: wrap; gap: 16px; }
.links-wrap a { font-size: 13px; color: #64748b; }
.links-wrap a:hover { color: var(--neon-blue); }
.footer-bottom {
  padding: 20px 0; text-align: center; font-size: 13px; color: #64748b;
  border-top: 1px solid rgba(255,255,255,0.05); margin-top: 20px;
}

/* Float Tools */
.float-tools {
  position: fixed; right: 24px; bottom: 24px; z-index: 999;
  display: flex; flex-direction: column; gap: 12px;
}
.float-btn {
  width: 52px; height: 52px; border-radius: 50%; background: #fff;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1); display: flex; align-items: center; justify-content: center;
  font-size: 22px; cursor: pointer; transition: all 0.3s; border: 1px solid rgba(0,0,0,0.05);
  position: relative;
}
.float-btn:hover { transform: translateY(-3px); box-shadow: var(--shadow-neon); color: var(--neon-purple); }
.float-btn .tooltip {
  position: absolute; right: 64px; top: 50%; transform: translateY(-50%);
  background: #0f172a; color: #fff; padding: 8px 14px; border-radius: 8px;
  font-size: 13px; white-space: nowrap; opacity: 0; pointer-events: none; transition: opacity 0.3s;
}
.float-btn:hover .tooltip { opacity: 1; }
.qr-popup {
  position: absolute; right: 64px; bottom: 0; width: 180px; background: #fff;
  border-radius: 12px; padding: 16px; box-shadow: 0 10px 30px rgba(0,0,0,0.15);
  opacity: 0; pointer-events: none; transition: all 0.3s; transform: translateY(10px);
}
.float-btn:hover .qr-popup { opacity: 1; pointer-events: auto; transform: translateY(0); }
.qr-popup img { width: 100%; border-radius: 8px; margin-bottom: 8px; }
.qr-popup p { font-size: 12px; text-align: center; color: var(--text-sub); }

/* Animations */
.fade-in-up { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-in-up.visible { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 1024px) {
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .scene-cards { grid-template-columns: repeat(2, 1fr); }
  .process-line { display: none; }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: 1fr 1fr; }
  .case-item.large { grid-row: span 1; }
  .training-cards { grid-template-columns: 1fr; }
  .network-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr 1fr; }
  .articles-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-menu { 
    display: none; position: absolute; top: 72px; left: 0; width: 100%; 
    background: #fff; flex-direction: column; padding: 20px; gap: 16px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
  }
  .nav-menu.open { display: flex; }
  .mobile-toggle { display: block; }
  .header-btn { display: none; }
  .hero-title { font-size: 32px; }
  .hero-desc { font-size: 16px; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat-card { padding: 16px; }
  .stat-num { font-size: 24px; }
  .section-title { font-size: 28px; }
  .about-grid { grid-template-columns: 1fr; }
  .scene-cards { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .float-tools { right: 16px; bottom: 16px; }
  .float-btn { width: 44px; height: 44px; font-size: 18px; }
}