/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --secondary: #0f172a;
    --text: #334155;
    --text-light: #64748b;
    --bg: #ffffff;
    --bg-alt: #f8fafc;
    --bg-dark: #0f172a;
    --border: #e2e8f0;
    --radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -1px rgba(0,0,0,0.04);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
}
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif; color: var(--text); line-height: 1.6; }
a { text-decoration: none; color: inherit; transition: all 0.3s; }
img { max-width: 100%; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

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

/* ===== Header / Navbar ===== */
.header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.8); backdrop-filter: blur(12px); transition: all 0.3s; }
.header.scrolled { background: rgba(255,255,255,0.98); box-shadow: 0 1px 3px rgba(0,0,0,0.1); }
.navbar { height: 72px; }
.nav-container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 1.3rem; font-weight: 700; color: var(--secondary); }
.logo-icon { font-size: 1.8rem; color: var(--primary); }
.nav-menu { display: flex; align-items: center; gap: 8px; list-style: none; }
.nav-menu a { padding: 8px 16px; border-radius: 8px; font-size: 0.95rem; font-weight: 500; color: var(--text); }
.nav-menu a:hover, .nav-menu a.active { color: var(--primary); background: var(--primary-light); }
.btn-nav { background: var(--primary) !important; color: white !important; padding: 8px 20px !important; border-radius: 8px !important; font-weight: 600 !important; }
.btn-nav:hover { background: var(--primary-dark) !important; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; flex-direction: column; gap: 5px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--secondary); transition: all 0.3s; }

/* ===== Buttons ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 28px; border-radius: 10px; font-weight: 600; font-size: 1rem; transition: all 0.3s; cursor: pointer; border: 2px solid transparent; }
.btn-primary { background: var(--primary); color: white; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-outline { background: transparent; color: white; border-color: rgba(255,255,255,0.4); }
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: white; }
.btn-outline-dark { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline-dark:hover { background: var(--primary); color: white; }
.btn-white { background: white; color: var(--primary); border-color: white; }
.btn-white:hover { background: var(--primary-light); transform: translateY(-2px); }
.btn-outline-white { background: transparent; color: white; border-color: rgba(255,255,255,0.5); }
.btn-outline-white:hover { background: rgba(255,255,255,0.15); border-color: white; }
.btn-block { width: 100%; }
.btn-sm { padding: 8px 20px; font-size: 0.9rem; }

/* ===== Hero Section ===== */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; overflow: hidden; padding-top: 72px; }
.hero-bg { position: absolute; inset: 0; background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #2563eb 100%); z-index: 0; }
.hero-bg::before { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 30% 50%, rgba(59,130,246,0.3), transparent 60%), radial-gradient(circle at 70% 80%, rgba(99,102,241,0.2), transparent 50%); }
.hero-content { position: relative; z-index: 1; color: white; padding: 80px 20px; }
.hero-badge { display: inline-block; background: rgba(255,255,255,0.1); backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,0.2); padding: 8px 20px; border-radius: 50px; font-size: 0.9rem; margin-bottom: 24px; }
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.5rem); font-weight: 800; line-height: 1.2; margin-bottom: 24px; }
.hero-highlight { background: linear-gradient(135deg, #60a5fa, #a78bfa); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc { font-size: 1.15rem; color: rgba(255,255,255,0.8); max-width: 600px; margin-bottom: 36px; line-height: 1.8; }
.hero-buttons { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 60px; }
.hero-stats { display: flex; gap: 48px; flex-wrap: wrap; }
.stat { display: flex; flex-direction: column; }
.stat-number { font-size: 2rem; font-weight: 800; color: white; }
.stat-label { font-size: 0.9rem; color: rgba(255,255,255,0.6); }
.hero-wave { position: absolute; bottom: -1px; left: 0; right: 0; z-index: 2; }
.hero-wave svg { display: block; width: 100%; }

/* ===== Sections ===== */
.section { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-tag { display: inline-block; background: var(--primary-light); color: var(--primary); padding: 6px 16px; border-radius: 50px; font-size: 0.85rem; font-weight: 600; margin-bottom: 16px; }
.section-header h2 { font-size: 2.2rem; font-weight: 800; color: var(--secondary); margin-bottom: 16px; }
.section-header p { font-size: 1.1rem; color: var(--text-light); max-width: 600px; margin: 0 auto; }

/* ===== Services ===== */
.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.service-card { background: white; border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; transition: all 0.3s; }
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
.service-icon { width: 64px; height: 64px; display: flex; align-items: center; justify-content: center; background: var(--primary-light); border-radius: 16px; color: var(--primary); margin-bottom: 20px; }
.service-card h3 { font-size: 1.3rem; color: var(--secondary); margin-bottom: 12px; }
.service-card > p { color: var(--text-light); margin-bottom: 16px; line-height: 1.7; }
.service-features { list-style: none; margin-bottom: 20px; }
.service-features li { padding: 4px 0; color: var(--text); font-size: 0.9rem; }
.service-features li::before { content: '✓ '; color: var(--primary); font-weight: bold; }
.service-link { color: var(--primary); font-weight: 600; font-size: 0.95rem; }
.service-link:hover { color: var(--primary-dark); }

/* ===== Trust Section ===== */
.trust-section { background: var(--bg-alt); }
.trust-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.trust-card { text-align: center; padding: 40px 24px; background: white; border-radius: var(--radius); border: 1px solid var(--border); transition: all 0.3s; }
.trust-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.trust-icon { font-size: 3rem; margin-bottom: 16px; }
.trust-card h4 { font-size: 1.2rem; color: var(--secondary); margin-bottom: 8px; }
.trust-card p { color: var(--text-light); font-size: 0.95rem; }

/* ===== Cases ===== */
.cases-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }
.case-card { background: white; border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; transition: all 0.3s; }
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.case-tag { display: inline-block; background: var(--primary-light); color: var(--primary); padding: 4px 12px; border-radius: 6px; font-size: 0.8rem; font-weight: 600; margin-bottom: 16px; }
.case-card h3 { font-size: 1.2rem; color: var(--secondary); margin-bottom: 12px; }
.case-card p { color: var(--text-light); margin-bottom: 16px; line-height: 1.7; }
.case-link { color: var(--primary); font-weight: 600; font-size: 0.95rem; }
.section-cta { text-align: center; margin-top: 48px; }

/* ===== Tech Section ===== */
.tech-section { background: var(--bg-alt); }
.tech-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.tech-content h2 { font-size: 2rem; font-weight: 800; color: var(--secondary); margin: 16px 0 32px; }
.tech-list { display: flex; flex-direction: column; gap: 24px; }
.tech-item { display: flex; gap: 16px; }
.tech-check { width: 32px; height: 32px; min-width: 32px; background: var(--primary-light); color: var(--primary); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-weight: bold; }
.tech-item h4 { color: var(--secondary); margin-bottom: 4px; }
.tech-item p { color: var(--text-light); font-size: 0.9rem; }
.tech-visual { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.tech-card { background: white; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; display: flex; gap: 16px; align-items: flex-start; transition: all 0.3s; }
.tech-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.tech-card-icon { font-size: 2rem; }
.tech-card-text strong { display: block; color: var(--secondary); margin-bottom: 4px; }
.tech-card-text span { font-size: 0.85rem; color: var(--text-light); }

/* ===== CTA Section ===== */
.cta-section { background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%); padding: 80px 0; }
.cta-content { text-align: center; color: white; }
.cta-content h2 { font-size: 2.2rem; font-weight: 800; margin-bottom: 16px; }
.cta-content p { font-size: 1.1rem; opacity: 0.9; margin-bottom: 32px; max-width: 500px; margin-left: auto; margin-right: auto; }
.cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== Page Hero (Subpages) ===== */
.page-hero { background: linear-gradient(135deg, #0f172a, #1e3a5f); padding: 140px 0 80px; color: white; text-align: center; }
.page-hero h1 { font-size: 2.5rem; font-weight: 800; margin-bottom: 12px; }
.page-hero p { font-size: 1.1rem; opacity: 0.8; }

/* ===== About Page ===== */
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; align-items: start; }
.about-content h2 { font-size: 2rem; font-weight: 800; color: var(--secondary); margin: 16px 0 20px; }
.about-content p { color: var(--text-light); margin-bottom: 16px; line-height: 1.8; }
.about-highlights { display: flex; gap: 32px; margin-top: 32px; }
.highlight-item { text-align: center; }
.highlight-item strong { display: block; font-size: 2rem; color: var(--primary); }
.highlight-item span { font-size: 0.9rem; color: var(--text-light); }
.about-visual { display: flex; flex-direction: column; gap: 20px; }
.about-card { background: var(--bg-alt); border-radius: var(--radius); padding: 32px; border: 1px solid var(--border); }
.about-card-inner { }
.vision-icon { font-size: 2.5rem; margin-bottom: 16px; }
.about-card h3 { color: var(--secondary); margin-bottom: 12px; }
.about-card p { color: var(--text-light); line-height: 1.7; }

/* ===== Values ===== */
.values-section { background: var(--bg-alt); }
.values-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 24px; }
.value-card { background: white; border-radius: var(--radius); padding: 32px; border: 1px solid var(--border); transition: all 0.3s; }
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.value-number { font-size: 2.5rem; font-weight: 900; color: var(--primary-light); margin-bottom: 12px; }
.value-card h3 { color: var(--secondary); margin-bottom: 12px; font-size: 1.2rem; }
.value-card p { color: var(--text-light); font-size: 0.95rem; line-height: 1.7; }

/* ===== Timeline ===== */
.timeline { position: relative; padding-left: 40px; max-width: 700px; margin: 0 auto; }
.timeline::before { content: ''; position: absolute; left: 14px; top: 0; bottom: 0; width: 2px; background: var(--border); }
.timeline-item { position: relative; margin-bottom: 40px; }
.timeline-marker { position: absolute; left: -33px; top: 6px; width: 16px; height: 16px; border-radius: 50%; background: var(--primary); border: 3px solid var(--primary-light); }
.timeline-content { background: white; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.timeline-year { display: inline-block; background: var(--primary); color: white; padding: 2px 12px; border-radius: 4px; font-size: 0.85rem; font-weight: 600; margin-bottom: 8px; }
.timeline-content h3 { color: var(--secondary); margin-bottom: 8px; }
.timeline-content p { color: var(--text-light); font-size: 0.95rem; }

/* ===== Team ===== */
.team-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.team-card { text-align: center; background: white; border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; transition: all 0.3s; }
.team-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.team-avatar { width: 80px; height: 80px; border-radius: 50%; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 2rem; font-weight: 700; margin: 0 auto 16px; overflow: hidden; }
.team-avatar img { width: 100%; height: 100%; object-fit: cover; }
.team-card h4 { color: var(--secondary); margin-bottom: 4px; }
.team-position { display: block; color: var(--primary); font-size: 0.9rem; font-weight: 500; margin-bottom: 12px; }
.team-card p { color: var(--text-light); font-size: 0.9rem; }

/* ===== Services Detail Page ===== */
.service-detail { margin-bottom: 60px; padding-bottom: 60px; border-bottom: 1px solid var(--border); }
.service-detail:last-child { border-bottom: none; }
.service-detail-icon { font-size: 3rem; margin-bottom: 16px; }
.service-detail-content h2 { font-size: 2rem; font-weight: 800; color: var(--secondary); margin: 12px 0 16px; }
.service-detail-content > p { color: var(--text-light); font-size: 1.05rem; line-height: 1.8; margin-bottom: 32px; }
.feature-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.feature-item { background: var(--bg-alt); border-radius: var(--radius); padding: 24px; border: 1px solid var(--border); }
.feature-item h4 { color: var(--secondary); margin-bottom: 8px; }
.feature-item p { color: var(--text-light); font-size: 0.95rem; line-height: 1.6; }

/* ===== Process ===== */
.process-section { background: var(--bg-alt); }
.process-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 20px; }
.process-card { text-align: center; background: white; border-radius: var(--radius); padding: 32px 20px; border: 1px solid var(--border); transition: all 0.3s; }
.process-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.process-number { font-size: 2.5rem; font-weight: 900; color: var(--primary); margin-bottom: 16px; }
.process-card h3 { color: var(--secondary); margin-bottom: 8px; font-size: 1.1rem; }
.process-card p { color: var(--text-light); font-size: 0.9rem; }

/* ===== Cases List ===== */
.filter-bar { background: white; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; margin-bottom: 32px; }
.filter-group { margin-bottom: 16px; }
.filter-group:last-child { margin-bottom: 0; }
.filter-group label { font-weight: 600; color: var(--secondary); margin-right: 12px; font-size: 0.95rem; }
.filter-tags { display: inline-flex; flex-wrap: wrap; gap: 8px; }
.filter-tag { padding: 6px 16px; border-radius: 6px; font-size: 0.85rem; background: var(--bg-alt); color: var(--text); border: 1px solid var(--border); transition: all 0.3s; }
.filter-tag:hover, .filter-tag.active { background: var(--primary); color: white; border-color: var(--primary); }
.cases-list { display: flex; flex-direction: column; gap: 20px; }
.case-list-card { background: white; border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; transition: all 0.3s; }
.case-list-card:hover { box-shadow: var(--shadow); }
.case-list-tags { display: flex; gap: 8px; margin-bottom: 12px; }
.badge { padding: 4px 12px; border-radius: 6px; font-size: 0.8rem; font-weight: 600; }
.badge-type { background: var(--primary-light); color: var(--primary); }
.badge-category { background: #f0fdf4; color: #16a34a; }
.case-list-card h3 { color: var(--secondary); font-size: 1.3rem; margin-bottom: 8px; }
.case-client { color: var(--text-light); font-size: 0.9rem; margin-bottom: 8px; }
.case-highlights { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.highlight-tag { background: var(--bg-alt); border: 1px solid var(--border); padding: 4px 12px; border-radius: 4px; font-size: 0.8rem; color: var(--text); }
.empty-state { text-align: center; padding: 80px 20px; }
.empty-icon { font-size: 4rem; margin-bottom: 16px; }
.empty-state h3 { color: var(--secondary); margin-bottom: 8px; }
.empty-state p { color: var(--text-light); margin-bottom: 24px; }

/* ===== Case Detail ===== */
.breadcrumb { margin-bottom: 20px; }
.breadcrumb a { color: rgba(255,255,255,0.7); font-size: 0.9rem; }
.breadcrumb a:hover { color: white; }
.case-meta { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-top: 16px; }
.meta-text { font-size: 0.9rem; opacity: 0.8; }
.case-detail-grid { display: grid; grid-template-columns: 1fr 340px; gap: 40px; align-items: start; }
.case-detail-main h2 { font-size: 1.5rem; color: var(--secondary); margin-bottom: 20px; margin-top: 32px; }
.case-detail-main h2:first-child { margin-top: 0; }
.case-description { color: var(--text-light); line-height: 1.8; }
.highlights-list { display: flex; flex-direction: column; gap: 12px; }
.highlight-item-detail { display: flex; gap: 12px; align-items: center; }
.highlight-check { width: 28px; height: 28px; min-width: 28px; background: var(--primary-light); color: var(--primary); border-radius: 6px; display: flex; align-items: center; justify-content: center; font-weight: bold; font-size: 0.85rem; }
.case-sidebar { position: sticky; top: 100px; }
.sidebar-card { background: white; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; margin-bottom: 20px; }
.sidebar-card h4 { color: var(--secondary); margin-bottom: 16px; font-size: 1.1rem; }
.sidebar-info { list-style: none; }
.sidebar-info li { display: flex; justify-content: space-between; padding: 12px 0; border-bottom: 1px solid var(--border); }
.sidebar-info li:last-child { border-bottom: none; }
.sidebar-info .label { color: var(--text-light); font-size: 0.9rem; }
.sidebar-info .value { color: var(--secondary); font-weight: 600; font-size: 0.9rem; }
.sidebar-cta { background: var(--primary-light); border-color: transparent; }
.sidebar-cta p { color: var(--text-light); margin-bottom: 16px; font-size: 0.95rem; }
.related-cases { margin-top: 60px; padding-top: 40px; border-top: 1px solid var(--border); }
.related-cases h2 { font-size: 1.5rem; color: var(--secondary); margin-bottom: 24px; }

/* ===== Contact Page ===== */
.contact-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: start; }
.contact-form-wrapper h2 { font-size: 1.8rem; color: var(--secondary); margin-bottom: 8px; }
.contact-form-wrapper > p { color: var(--text-light); margin-bottom: 32px; }
.messages { margin-bottom: 24px; }
.alert { padding: 14px 20px; border-radius: 8px; margin-bottom: 8px; font-size: 0.95rem; }
.alert-success { background: #f0fdf4; color: #16a34a; border: 1px solid #bbf7d0; }
.alert-error { background: #fef2f2; color: #dc2626; border: 1px solid #fecaca; }
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-weight: 600; color: var(--secondary); font-size: 0.95rem; }
.required { color: #dc2626; }
.form-group input, .form-group select, .form-group textarea {
    padding: 12px 16px; border: 1px solid var(--border); border-radius: 8px; font-size: 1rem;
    font-family: inherit; transition: all 0.3s; background: white; color: var(--text);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.form-group textarea { resize: vertical; }
.info-card { background: white; border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; margin-bottom: 20px; }
.info-card h3 { color: var(--secondary); margin-bottom: 24px; font-size: 1.2rem; }
.info-list { display: flex; flex-direction: column; gap: 20px; }
.info-item { display: flex; gap: 16px; }
.info-icon { font-size: 1.5rem; min-width: 40px; }
.info-item h4 { color: var(--secondary); margin-bottom: 4px; font-size: 0.95rem; }
.info-item p { color: var(--text-light); font-size: 0.95rem; }
.faq-card { background: var(--bg-alt); }
.faq-item { border-bottom: 1px solid var(--border); padding: 12px 0; }
.faq-item:last-child { border-bottom: none; }
.faq-item summary { cursor: pointer; font-weight: 600; color: var(--secondary); font-size: 0.95rem; padding: 4px 0; }
.faq-item p { color: var(--text-light); font-size: 0.9rem; margin-top: 8px; line-height: 1.6; }

/* ===== Footer ===== */
.footer { background: var(--bg-dark); color: rgba(255,255,255,0.7); 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(255,255,255,0.1); }
.footer-brand p { margin-top: 16px; font-size: 0.95rem; line-height: 1.7; }
.footer-brand .logo { color: white; }
.social-links { display: flex; gap: 12px; margin-top: 20px; }
.social-links a { width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; border-radius: 8px; background: rgba(255,255,255,0.1); color: rgba(255,255,255,0.7); transition: all 0.3s; }
.social-links a:hover { background: var(--primary); color: white; }
.footer-links h4 { color: white; margin-bottom: 20px; font-size: 1rem; }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 10px; font-size: 0.95rem; }
.footer-links a:hover { color: white; }
.footer-bottom { text-align: center; padding: 24px 0; font-size: 0.9rem; }
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: white; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .tech-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-grid { grid-template-columns: 1fr; }
    .case-detail-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .nav-menu {
        position: fixed; top: 72px; left: 0; right: 0; background: white;
        flex-direction: column; padding: 20px; gap: 4px;
        transform: translateY(-120%); transition: all 0.3s; box-shadow: var(--shadow-lg);
    }
    .nav-menu.active { transform: translateY(0); }
    .nav-menu a { padding: 12px 16px; display: block; }
    .hero h1 { font-size: 2rem; }
    .hero-stats { gap: 24px; }
    .stat-number { font-size: 1.5rem; }
    .section-header h2 { font-size: 1.8rem; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .tech-visual { grid-template-columns: 1fr; }
    .cta-content h2 { font-size: 1.6rem; }
    .page-hero h1 { font-size: 1.8rem; }
    .about-highlights { gap: 16px; }
    .filter-group { display: flex; flex-direction: column; gap: 8px; }
}