/* ========================================
   爱加速 - 共享样式 (v1 科技蓝风格)
   ======================================== */

:root {
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --primary-light: #3B82F6;
    --primary-glow: rgba(37, 99, 235, 0.15);
    --primary-glow-strong: rgba(37, 99, 235, 0.25);
    --bg: #F8FAFC;
    --bg-card: #FFFFFF;
    --bg-section: #F8FAFC;
    --bg-dark: #0F172A;
    --text: #0F172A;
    --text-secondary: #64748B;
    --text-muted: #94A3B8;
    --border: #E2E8F0;
    --border-light: #F1F5F9;
    --success: #22C55E;
    --warning: #F59E0B;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.1), 0 4px 16px rgba(0,0,0,0.06);
    --shadow-glow: 0 0 40px rgba(37,99,235,0.15);
    --container: 1200px;
    --nav-h: 72px;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

body {
    font-family: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--primary-light); border-radius: 3px; }

/* ========================================
   NAVBAR
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-h);
    z-index: 1000;
    background: rgba(248, 250, 252, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: all 0.3s;
}
.navbar.scrolled {
    background: rgba(255,255,255,0.95);
    border-bottom-color: var(--border);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    font-size: 1.2rem;
    font-family: 'Inter', sans-serif;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: 8px;
    transition: all 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
    background: var(--primary-glow);
}

.nav-cta {
    text-decoration: none;
    background: var(--primary);
    color: #fff;
    font-size: 0.875rem;
    font-weight: 600;
    padding: 8px 20px;
    border-radius: 8px;
    transition: all 0.2s;
    white-space: nowrap;
}

.nav-cta:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    margin-left: auto;
}

.mobile-menu-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 1px;
    transition: all 0.3s;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 12px 28px;
    border-radius: 10px;
    text-decoration: none;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(37,99,235,0.35);
}

.btn-primary.large {
    font-size: 1.05rem;
    padding: 16px 40px;
    border-radius: 12px;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    text-decoration: none;
    padding: 12px 20px;
    border-radius: 10px;
    transition: all 0.2s;
}

.btn-secondary:hover {
    color: var(--primary);
    background: var(--primary-glow);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 12px 28px;
    border-radius: 10px;
    text-decoration: none;
    border: 2px solid var(--primary);
    transition: all 0.2s;
    cursor: pointer;
}

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}

/* ========================================
   SECTION
   ======================================== */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--primary);
    background: var(--primary-glow);
    padding: 6px 14px;
    border-radius: 20px;
    margin-bottom: 16px;
    border: 1px solid rgba(37,99,235,0.15);
}

/* ========================================
   HERO
   ======================================== */
.hero {
    min-height: 100vh;
    padding-top: var(--nav-h);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: var(--bg);
}

.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(37,99,235,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37,99,235,0.04) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-bg-glow {
    position: absolute;
    top: -200px;
    right: -200px;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(37,99,235,0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
    padding-top: 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    width: 100%;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary);
    background: var(--primary-glow);
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid rgba(37,99,235,0.15);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.3); }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.gradient-text-blue {
    background: linear-gradient(135deg, var(--primary) 0%, #60A5FA 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 40px;
    max-width: 540px;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px 28px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-sm);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    padding: 0 8px;
}

.stat-num {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--text);
    font-family: 'Inter', sans-serif;
    letter-spacing: -0.03em;
}

.stat-unit {
    font-size: 0.9rem;
    font-weight: 600;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
    white-space: nowrap;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
    flex-shrink: 0;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.connection-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 380px;
    font-family: 'Inter', 'Noto Sans SC', sans-serif;
}

.cc-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.cc-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--success);
}

.cc-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.cc-dot.connected {
    background: var(--success);
    box-shadow: 0 0 8px rgba(34,197,94,0.5);
    animation: pulse-dot 2s infinite;
}

.cc-shield {
    width: 36px;
    height: 36px;
    background: var(--primary-glow);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cc-device {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.cc-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-light);
}

.cc-row:last-of-type {
    border-bottom: none;
}

.cc-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.cc-value {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
}

.cc-value.highlight {
    color: var(--primary);
}

.cc-value.success {
    color: var(--success);
}

.cc-progress {
    margin-top: 16px;
}

.cc-p-bar {
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
}

.cc-p-fill {
    height: 100%;
    width: 85%;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 2px;
}

.cc-p-label {
    font-size: 0.75rem;
    color: var(--success);
    font-weight: 600;
    margin-top: 6px;
    display: block;
}

/* ========================================
   STATUS BAR
   ======================================== */
.status-bar {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
}

.status-bar-inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.status-bar-inner > span:first-child {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text);
    font-weight: 500;
    margin-right: 8px;
}

.lock-badge {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--success);
    font-weight: 600;
}

/* ========================================
   COMPARISON
   ======================================== */
.comparison {
    background: var(--bg-card);
}

.comp-table {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 32px;
}

.comp-header {
    display: grid;
    grid-template-columns: 2fr 2fr 2fr;
    background: var(--text);
    color: #fff;
    font-weight: 700;
    font-size: 0.9rem;
    padding: 16px 24px;
}

.comp-header .highlight-col {
    color: var(--primary-light);
}

.comp-row {
    display: grid;
    grid-template-columns: 2fr 2fr 2fr;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
    transition: background 0.2s;
}

.comp-row:last-child { border-bottom: none; }
.comp-row:hover { background: var(--bg-card); }

.comp-dim {
    font-weight: 600;
    color: var(--text);
}

.comp-old {
    color: var(--text-muted);
}

.comp-new {
    color: var(--primary);
    font-weight: 600;
}

.comp-cta {
    text-align: center;
}

/* ========================================
   SCENARIOS
   ======================================== */
.scenarios {
    background: var(--bg);
}

.scenario-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.scenario-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    transition: all 0.3s;
}

.scenario-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-4px);
}

.scenario-card.featured {
    border-color: var(--primary);
    background: linear-gradient(135deg, rgba(37,99,235,0.03), rgba(37,99,235,0.08));
    box-shadow: var(--shadow-glow);
}

.sc-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.scenario-card h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.4;
}

.scenario-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.sc-tag {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-glow);
    padding: 4px 12px;
    border-radius: 20px;
    display: inline-block;
}

/* ========================================
   NODES
   ======================================== */
.nodes {
    background: var(--bg-card);
}

.nodes-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.node-region {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    transition: all 0.2s;
}

.node-region:hover {
    border-color: var(--primary);
    background: var(--primary-glow);
}

.nr-title {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text);
    margin-bottom: 8px;
}

.nr-list {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.nodes-note {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

/* ========================================
   TECH
   ======================================== */
.tech {
    background: var(--bg);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.tech-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all 0.3s;
}

.tech-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.tc-icon {
    width: 52px;
    height: 52px;
    background: var(--primary-glow);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.tech-card h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.tech-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   SOCIAL PROOF
   ======================================== */
.social-proof {
    background: var(--bg-card);
}

.client-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.client-item {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.client-item:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.cert-row {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.cert-item {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.testimonial {
    background: linear-gradient(135deg, rgba(37,99,235,0.03), rgba(37,99,235,0.08));
    border: 1px solid rgba(37,99,235,0.15);
    border-radius: var(--radius-xl);
    padding: 40px 48px;
    text-align: center;
    position: relative;
}

.quote-mark {
    font-size: 4rem;
    color: var(--primary);
    line-height: 1;
    font-family: Georgia, serif;
    opacity: 0.3;
    position: absolute;
    top: 20px;
    left: 40px;
}

.quote-text {
    font-size: 1.15rem;
    color: var(--text);
    line-height: 1.7;
    font-weight: 500;
    max-width: 700px;
    margin: 0 auto 16px;
}

.quote-author {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
}

/* ========================================
   PRICING
   ======================================== */
.pricing {
    background: var(--bg);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 36px 28px;
    position: relative;
    transition: all 0.3s;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.popular {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.pc-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    background: var(--bg);
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 16px;
}

.pc-badge.hot {
    color: #EA580C;
    background: #FFF7ED;
}

.pc-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.pc-price {
    margin-bottom: 12px;
}

.pc-amount {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--text);
    font-family: 'Inter', sans-serif;
    letter-spacing: -0.04em;
}

.pc-period {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
}

.pc-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.pc-features {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 28px;
}

.pc-feat {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.pricing-card .btn-primary,
.pricing-card .btn-outline {
    width: 100%;
    justify-content: center;
}

.pricing-card.popular .btn-primary {
    box-shadow: 0 4px 16px rgba(37,99,235,0.3);
}

.pricing-note {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ========================================
   FAQ
   ======================================== */
.faq {
    background: var(--bg-card);
}

.faq-list {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.3s;
}

.faq-item:hover,
.faq-item.open {
    border-color: var(--primary);
}

.faq-q {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    gap: 16px;
}

.faq-q svg {
    flex-shrink: 0;
    color: var(--text-muted);
    transition: transform 0.3s;
}

.faq-item.open .faq-q svg {
    transform: rotate(45deg);
}

.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    padding: 0 24px;
}

.faq-item.open .faq-a {
    max-height: 200px;
    padding: 0 24px 20px;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--bg);
    border-top: 1px solid var(--border);
    padding: 80px 0 40px;
}

.footer-cta {
    text-align: center;
    margin-bottom: 64px;
}

.footer-cta h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.footer-cta p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    margin-bottom: 48px;
}

.fl-col {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.fl-title {
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--text);
    margin-bottom: 6px;
}

.fl-col a {
    text-decoration: none;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.fl-col a:hover {
    color: var(--primary);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-bottom a {
    color: var(--text-muted);
    text-decoration: none;
}

.footer-bottom a:hover {
    color: var(--primary);
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 48px;
        text-align: center;
    }
    .hero-subtitle { margin: 0 auto 40px; }
    .hero-stats { justify-content: center; }
    .hero-actions { justify-content: center; }
    .hero-visual { display: none; }
    .scenario-grid { grid-template-columns: repeat(2, 1fr); }
    .nodes-grid { grid-template-columns: repeat(3, 1fr); }
    .pricing-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto 32px; }
    .footer-links { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    :root { --nav-h: 64px; }
    .hero-title { font-size: 2.5rem; }
    .section { padding: 64px 0; }
    .section-header h2 { font-size: 1.8rem; }
    .comp-header,
    .comp-row { grid-template-columns: 1.5fr 2fr 2fr; padding: 12px 16px; font-size: 0.8rem; }
    .scenario-grid { grid-template-columns: 1fr; }
    .tech-grid { grid-template-columns: 1fr; }
    .client-grid { grid-template-columns: repeat(2, 1fr); }
    .nav-links { display: none; }
    .nav-links.open { display: flex; flex-direction: column; position: absolute; top: var(--nav-h); left: 0; right: 0; background: #fff; padding: 16px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-md); }
    .nav-links.open a { padding: 12px 16px; }
    .mobile-menu-btn { display: flex; }
    .cert-row { flex-direction: column; gap: 10px; align-items: center; }
    .footer-links { grid-template-columns: repeat(2, 1fr); }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}