/* ========================================
   商邦进销存 - 数字化官网
   Modern, Premium, Digital Design
   ======================================== */

/* --- Reset & Variables --- */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --cyan: #06b6d4;
    --cyan-dark: #0891b2;
    --green: #10b981;
    --amber: #f59e0b;
    --pink: #ec4899;
    --purple: #8b5cf6;

    --bg: #030712;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);

    --text: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --gradient: linear-gradient(135deg, var(--primary), var(--cyan));
    --gradient-text: linear-gradient(135deg, #818cf8, #22d3ee);

    --radius: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --shadow: 0 0 0 1px var(--border);
    --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.5);

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --container: 1200px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

body {
    font-family: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}
body > .footer { margin-top: auto; }

a {
    color: inherit;
    text-decoration: none;
}

img { max-width: 100%; display: block; }
ul { list-style: none; }

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

@media (max-width: 768px) {
    .container { padding: 0 20px; }
}
@media (max-width: 480px) {
    .container { padding: 0 18px; }
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    text-decoration: none;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
    border-radius: 12px;
}

.btn-primary {
    background: var(--gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}
.btn-primary:hover {
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border-hover);
}
.btn-outline:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.btn-white {
    background: white;
    color: var(--bg);
    font-weight: 600;
}
.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.2);
}

.btn-glass {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}
.btn-glass:hover {
    background: rgba(255, 255, 255, 0.2);
}

.btn-block { width: 100%; justify-content: center; }

.btn-nav {
    background: var(--gradient);
    color: white;
    padding: 8px 20px;
    font-size: 13px;
    border-radius: 8px;
}
.btn-nav:hover {
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
}

.navbar.scrolled {
    padding: 10px 0;
    background: rgba(3, 7, 18, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.logo-highlight {
    color: var(--cyan);
}

.nav-links {
    display: flex;
    gap: 4px;
}

.nav-link {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    color: var(--text);
    background: rgba(255, 255, 255, 0.05);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-toggle span {
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 120px 0 60px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 30%, transparent 70%);
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
}

.hero-glow-1 {
    width: 600px;
    height: 600px;
    background: var(--primary);
    top: -200px;
    left: -100px;
    opacity: 0.15;
}

.hero-glow-2 {
    width: 500px;
    height: 500px;
    background: var(--cyan);
    top: -100px;
    right: -150px;
    opacity: 0.1;
}

.hero-glow-3 {
    width: 400px;
    height: 400px;
    background: var(--purple);
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0.08;
}

.hero-particles {
    position: absolute;
    inset: 0;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    animation: float-particle linear infinite;
}

@keyframes float-particle {
    0% { transform: translateY(0) scale(1); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(-100vh) scale(0); opacity: 0; }
}

.hero-content {
    position: relative;
    text-align: center;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    border-radius: 100px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    font-size: 13px;
    color: #818cf8;
    margin-bottom: 32px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: #818cf8;
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    font-size: clamp(40px, 6vw, 72px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.hero-desc {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 640px;
    margin: 0 auto 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 64px;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-suffix {
    font-size: 24px;
    font-weight: 700;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

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

/* --- Dashboard Mockup --- */
.hero-visual {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 960px;
    margin: 48px auto 0;
    padding: 0 24px;
}

.dashboard-mockup {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow:
        0 0 0 1px rgba(255,255,255,0.05),
        0 25px 80px -20px rgba(0, 0, 0, 0.5),
        0 0 60px rgba(99, 102, 241, 0.08);
}

.mockup-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
    background: rgba(255,255,255,0.02);
}

.mockup-dots {
    display: flex;
    gap: 6px;
}

.mockup-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.mockup-dots span:nth-child(1) { background: #ef4444; }
.mockup-dots span:nth-child(2) { background: #f59e0b; }
.mockup-dots span:nth-child(3) { background: #10b981; }

.mockup-title {
    font-size: 12px;
    color: var(--text-muted);
}

.mockup-body {
    display: flex;
    min-height: 340px;
}

.mockup-sidebar {
    width: 180px;
    border-right: 1px solid var(--border);
    padding: 12px;
    flex-shrink: 0;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 2px;
}

.sidebar-item.active {
    background: rgba(99, 102, 241, 0.1);
    color: #818cf8;
}

.mockup-main {
    flex: 1;
    padding: 16px;
}

.mockup-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.m-card {
    padding: 14px;
    border-radius: 10px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border);
}

.m-card-label {
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 6px;
}

.m-card-value {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
}

.m-card-trend {
    font-size: 11px;
    color: var(--text-muted);
}

.m-card-trend.up { color: #10b981; }

.m-card-blue .m-card-value { color: #60a5fa; }
.m-card-green .m-card-value { color: #34d399; }
.m-card-purple .m-card-value { color: #a78bfa; }
.m-card-orange .m-card-value { color: #fbbf24; }

.mockup-chart {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.chart-period {
    color: var(--text-muted);
    font-size: 11px;
}

.chart-bars {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    height: 100px;
}

.chart-bar {
    flex: 1;
    height: var(--h);
    background: rgba(99, 102, 241, 0.2);
    border-radius: 4px 4px 0 0;
    transition: var(--transition);
}

.chart-bar.active {
    background: var(--gradient);
}

.chart-bar:hover {
    background: var(--gradient);
    opacity: 0.8;
}

/* --- Section Styles --- */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 100px;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.15);
    font-size: 13px;
    color: #818cf8;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
}

/* --- Features --- */
.features {
    padding: 120px 0;
    position: relative;
}

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

.feature-card {
    position: relative;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    overflow: hidden;
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.feature-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: rgba(99, 102, 241, 0.08);
    color: var(--accent, var(--primary));
    margin-bottom: 20px;
    transition: var(--transition);
}

.feature-card:hover .feature-icon {
    background: rgba(99, 102, 241, 0.15);
    transform: scale(1.05);
}

.feature-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.feature-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.feature-line {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.feature-card:hover .feature-line {
    transform: scaleX(1);
}

/* --- Modules --- */
.modules {
    padding: 120px 0;
    background: linear-gradient(180deg, rgba(99, 102, 241, 0.02) 0%, transparent 100%);
}

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

.module-card {
    position: relative;
    padding: 36px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    overflow: hidden;
}

.module-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(99, 102, 241, 0.2);
    transform: translateY(-4px);
}

.module-number {
    position: absolute;
    top: 20px;
    right: 24px;
    font-size: 48px;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.03);
    line-height: 1;
    letter-spacing: -0.03em;
}

.module-card:hover .module-number {
    color: rgba(99, 102, 241, 0.08);
}

.module-icon {
    margin-bottom: 20px;
}

.module-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.module-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* --- Platforms --- */
.platforms {
    padding: 120px 0;
}

.platforms-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.platforms-content .section-tag {
    margin-bottom: 16px;
}

.platforms-content .section-title {
    text-align: left;
    margin-bottom: 16px;
}

.platforms-content .section-desc {
    text-align: left;
    margin: 0 0 36px;
}

.platform-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.platform-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.platform-item:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.platform-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: rgba(99, 102, 241, 0.1);
    color: #818cf8;
    flex-shrink: 0;
}

.platform-item strong {
    display: block;
    font-size: 14px;
    margin-bottom: 2px;
}

.platform-item span {
    font-size: 13px;
    color: var(--text-muted);
}

.platforms-visual {
    position: relative;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 20px;
    padding: 40px 0;
}

.device {
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    background: rgba(15, 23, 42, 0.8);
}

.device-desktop {
    width: 280px;
    border-radius: var(--radius-lg);
}

.device-tablet {
    width: 160px;
    border-radius: var(--radius);
}

.device-phone {
    width: 90px;
    border-radius: var(--radius);
}

.device-screen {
    padding: 8px;
}

.screen-bar {
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    margin-bottom: 8px;
    width: 40%;
}

.screen-content {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.s-row {
    display: flex;
    gap: 6px;
}

.s-block {
    height: 20px;
    background: rgba(99, 102, 241, 0.08);
    border-radius: 4px;
}

.s-block.h40 { height: 40px; }
.s-block.h60 { height: 60px; }
.s-block.w20 { flex: 0.2; }
.s-block.w30 { flex: 0.3; }
.s-block.w40 { flex: 0.4; }
.s-block.w50 { flex: 0.5; }
.s-block.w60 { flex: 0.6; }
.s-block.w100 { flex: 1; }

/* --- Pricing --- */
.pricing {
    padding: 120px 0;
    background: linear-gradient(180deg, transparent 0%, rgba(99, 102, 241, 0.02) 50%, transparent 100%);
}

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

.pricing-card {
    position: relative;
    padding: 40px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    transition: var(--transition);
}

.pricing-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
}

.pricing-card.featured {
    background: rgba(99, 102, 241, 0.05);
    border-color: rgba(99, 102, 241, 0.2);
    transform: scale(1.02);
}

.pricing-card.featured:hover {
    transform: scale(1.02) translateY(-4px);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 20px;
    background: var(--gradient);
    color: white;
    font-size: 12px;
    font-weight: 600;
    border-radius: 100px;
}

.pricing-header {
    margin-bottom: 24px;
}

.pricing-header h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 6px;
}

.pricing-header p {
    font-size: 14px;
    color: var(--text-muted);
}

.pricing-price {
    margin-bottom: 32px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--border);
}

.price-symbol {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-secondary);
    vertical-align: top;
}

.price-amount {
    font-size: 48px;
    font-weight: 800;
    letter-spacing: -0.03em;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.price-unit {
    font-size: 14px;
    color: var(--text-muted);
}

.pricing-features {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 32px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}

.pricing-note {
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 12px;
}

/* --- Services --- */
.services {
    padding: 120px 0;
}

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

.service-card {
    text-align: center;
    padding: 40px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.service-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.service-icon-wrapper {
    position: relative;
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
}

.service-ring {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.service-card:hover .service-ring {
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.1);
}

.service-icon {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #818cf8;
}

.service-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.service-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* --- Requirements --- */
.requirements {
    padding: 80px 0;
}

.req-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
    padding: 48px 56px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
}

.req-content h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.req-content p {
    font-size: 14px;
    color: var(--text-secondary);
}

.req-specs {
    display: flex;
    gap: 32px;
}

.req-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.req-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: rgba(99, 102, 241, 0.08);
    color: #818cf8;
    flex-shrink: 0;
}

.req-item strong {
    display: block;
    font-size: 14px;
    white-space: nowrap;
}

.req-item span {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
}

/* --- CTA --- */
.cta {
    position: relative;
    padding: 100px 0;
    overflow: hidden;
}

.cta-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(6, 182, 212, 0.1));
}

.cta-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
}

.cta-glow-1 {
    width: 500px;
    height: 500px;
    background: var(--primary);
    opacity: 0.1;
    top: -200px;
    right: -100px;
}

.cta-glow-2 {
    width: 400px;
    height: 400px;
    background: var(--cyan);
    opacity: 0.08;
    bottom: -150px;
    left: -100px;
}

.cta-content {
    position: relative;
    text-align: center;
    z-index: 2;
}

.cta h2 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    margin-bottom: 12px;
}

.cta p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 36px;
}

.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* --- Contact --- */
.contact {
    padding: 120px 0;
}

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

.contact-card {
    text-align: center;
    padding: 36px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.contact-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.contact-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: rgba(99, 102, 241, 0.08);
    color: #818cf8;
    margin: 0 auto 16px;
}

.contact-card h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 8px;
}

.contact-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.contact-wechat {
    margin-top: 40px;
    display: flex;
    align-items: center;
    gap: 40px;
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.contact-wechat::before {
    content: '';
    position: absolute;
    top: -60%;
    right: -10%;
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.18), transparent 60%);
    pointer-events: none;
}

.wechat-qr {
    flex-shrink: 0;
    width: 180px;
    height: 180px;
    padding: 12px;
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
    position: relative;
    z-index: 1;
}

.wechat-qr img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
}

.wechat-info {
    position: relative;
    z-index: 1;
    flex: 1;
}

.wechat-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(34, 197, 94, 0.12);
    color: #4ade80;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 14px;
}

.wechat-info h4 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.wechat-info p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.75;
}

.wechat-info p.wechat-hint {
    margin-top: 10px;
    font-size: 13px;
    color: var(--text-muted, #94a3b8);
}

@media (max-width: 768px) {
    .contact-wechat {
        flex-direction: column;
        text-align: center;
        gap: 24px;
        padding: 28px 20px;
    }
    .wechat-qr {
        width: 160px;
        height: 160px;
    }
    .wechat-info h4 { font-size: 18px; }
    .wechat-info p { font-size: 14px; }
}

/* --- 在线咨询页 --- */
.inquiry-section {
    position: relative;
    padding: 140px 0 100px;
    overflow: hidden;
}
.inquiry-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}
.inquiry-container { position: relative; z-index: 1; }
.inquiry-grid {
    display: grid;
    grid-template-columns: 1fr 1.25fr;
    gap: 56px;
    align-items: stretch;
}
.inquiry-intro { padding-top: 12px; }
.inquiry-intro .section-title {
    font-size: 42px;
    line-height: 1.2;
    margin: 14px 0 18px;
}
.inquiry-intro .section-desc {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 36px;
    max-width: 460px;
}
.inquiry-contacts {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.inquiry-contacts li {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}
.ic-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: rgba(99, 102, 241, 0.1);
    color: #818cf8;
}
.inquiry-contacts strong {
    display: block;
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 2px;
}
.inquiry-contacts span {
    font-size: 14px;
    color: var(--text-secondary);
}

.inquiry-form {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px;
}
.inquiry-form h2 {
    font-size: 24px;
    font-weight: 600;
    margin: 0 0 6px;
    color: var(--text-primary);
}
.inquiry-form .form-sub {
    font-size: 13px;
    color: var(--text-muted, #94a3b8);
    margin-bottom: 26px;
}
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px 20px;
}
.form-field { display: flex; flex-direction: column; gap: 8px; position: relative; }
.form-field.full { grid-column: 1 / -1; }
.form-field label {
    font-size: 13px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
}
.form-field label .req { color: #fb7185; font-style: normal; font-weight: 700; }
.form-field input,
.form-field select,
.form-field textarea {
    width: 100%;
    padding: 12px 14px;
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    border-color: #818cf8;
    background: rgba(15, 23, 42, 0.6);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.18);
}
.form-field textarea { resize: vertical; min-height: 120px; line-height: 1.6; }
.form-field select {
    appearance: none;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path fill='none' stroke='%2394a3b8' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round' d='M1 1l5 5 5-5'/></svg>");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 38px;
}
.char-count {
    position: absolute;
    right: 12px;
    bottom: 8px;
    font-size: 11px;
    color: var(--text-muted, #94a3b8);
    pointer-events: none;
}

.form-agree { margin: 22px 0 24px; }
.check {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 13px;
}
.check input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: #6366f1;
    cursor: pointer;
}
.check a { color: #a5b4fc; text-decoration: underline; }

.form-actions { display: flex; }
.form-actions .btn {
    width: 100%;
    position: relative;
    justify-content: center;
}
.btn-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 18px;
    height: 18px;
    margin: -9px 0 0 -9px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spinr 0.7s linear infinite;
}
@keyframes spinr { to { transform: rotate(360deg); } }

.form-status {
    margin-top: 18px;
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 14px;
    line-height: 1.55;
}
.form-status-loading { background: rgba(99, 102, 241, 0.1); color: #a5b4fc; border: 1px solid rgba(99, 102, 241, 0.25); }
.form-status-success { background: rgba(16, 185, 129, 0.1); color: #4ade80; border: 1px solid rgba(16, 185, 129, 0.3); }
.form-status-error { background: rgba(244, 63, 94, 0.1); color: #fb7185; border: 1px solid rgba(244, 63, 94, 0.3); }

@media (max-width: 1024px) {
    .inquiry-grid { grid-template-columns: 1fr; gap: 40px; }
    .inquiry-intro .section-title { font-size: 34px; }
}
@media (max-width: 640px) {
    .inquiry-section { padding: 110px 0 60px; }
    .inquiry-form { padding: 24px 18px; }
    .form-grid { grid-template-columns: 1fr; gap: 14px; }
    .inquiry-intro .section-title { font-size: 28px; }
}

/* --- 语言切换按钮 --- */
.lang-switch {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    margin-right: 10px;
    line-height: 1.2;
}
.lang-switch:hover {
    border-color: #818cf8;
    color: #fff;
    background: rgba(99, 102, 241, 0.12);
}

/* --- Demo 大屏轮播 --- */
.demo-carousel.bigscreen-stage {
    position: relative;
    aspect-ratio: 16 / 9;
    background: #0b1220;
    overflow: hidden;
}
.demo-carousel .demo-slide {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.8s ease;
}
.demo-carousel .demo-slide.active {
    opacity: 1;
    z-index: 1;
}
.demo-empty {
    position: absolute;
    inset: 0;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    color: #64748b;
    text-align: center;
    padding: 24px;
}
.demo-empty.show { display: flex; }
.demo-empty p { font-size: 14px; line-height: 1.7; max-width: 480px; }
.demo-empty code {
    padding: 2px 8px;
    background: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
    border-radius: 4px;
    font-family: 'JetBrains Mono', Menlo, Consolas, monospace;
    font-size: 12.5px;
}

/* --- Industry (软件/代码行业) --- */
.industry {
    position: relative;
    padding: 120px 0;
    overflow: hidden;
}
.industry-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}
.industry-glow {
    position: absolute;
    top: -20%;
    left: -10%;
    width: 620px;
    height: 620px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.14), transparent 60%);
    filter: blur(40px);
}
.industry-wrapper {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 56px;
    align-items: center;
    margin-top: 56px;
}
.industry-visual {
    position: relative;
    min-width: 0;
}
.code-mockup { width: 100%; max-width: 100%; }
.code-mockup {
    background: #0f172a;
    border: 1px solid rgba(148, 163, 184, 0.18);
    border-radius: 14px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(99, 102, 241, 0.12);
    overflow: hidden;
    font-family: 'JetBrains Mono', 'Fira Code', Menlo, Consolas, monospace;
    transform: perspective(1200px) rotateY(-2deg) rotateX(1deg);
}
.code-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 10px 14px;
    background: #111827;
    border-bottom: 1px solid rgba(148, 163, 184, 0.12);
}
.code-dots {
    display: flex;
    gap: 6px;
}
.code-dots span {
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: #475569;
}
.code-dots span:nth-child(1) { background: #ef4444; }
.code-dots span:nth-child(2) { background: #f59e0b; }
.code-dots span:nth-child(3) { background: #10b981; }
.code-tabs {
    display: flex;
    gap: 6px;
    flex: 1;
    overflow: hidden;
}
.code-tab {
    padding: 5px 12px;
    font-size: 12px;
    color: #64748b;
    border-radius: 6px 6px 0 0;
    background: transparent;
    white-space: nowrap;
}
.code-tab.active {
    background: #0f172a;
    color: #e2e8f0;
    box-shadow: inset 0 -2px 0 #6366f1;
}
.code-body {
    display: flex;
    padding: 16px 0 18px;
    font-size: 13.5px;
    line-height: 1.72;
    max-height: 380px;
    overflow: auto;
}
.code-gutter {
    display: flex;
    flex-direction: column;
    padding: 0 14px;
    color: #475569;
    text-align: right;
    border-right: 1px solid rgba(148, 163, 184, 0.08);
    user-select: none;
}
.code-content {
    margin: 0;
    padding: 0 18px;
    color: #e2e8f0;
    white-space: pre;
    font-family: inherit;
}
.code-content .kw   { color: #c084fc; }
.code-content .cls  { color: #f0abfc; }
.code-content .fn   { color: #60a5fa; }
.code-content .str  { color: #86efac; }
.code-content .num  { color: #fbbf24; }
.code-content .cmt  { color: #64748b; font-style: italic; }
.code-content .prop { color: #22d3ee; }
.code-statusbar {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 6px 14px;
    background: #1e293b;
    font-size: 11px;
    color: #94a3b8;
    border-top: 1px solid rgba(148, 163, 184, 0.1);
}
.sb-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.sb-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #64748b;
}
.sb-dot.online {
    background: #10b981;
    box-shadow: 0 0 8px rgba(16, 185, 129, 0.6);
}

.industry-content {
    display: flex;
    flex-direction: column;
    gap: 28px;
    min-width: 0;
}
.ind-pains {
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.ind-pain {
    display: flex;
    gap: 16px;
    padding: 18px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    min-width: 0;
}
.ind-pain > div {
    flex: 1;
    min-width: 0;
}
.ind-pain h4, .ind-pain p {
    overflow-wrap: anywhere;
    word-break: break-word;
}
.ind-pain:hover {
    border-color: var(--border-hover);
    transform: translateX(4px);
}
.ind-pain-num {
    flex-shrink: 0;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.25), rgba(6, 182, 212, 0.25));
    color: #818cf8;
    font-weight: 700;
    font-size: 13px;
}
.ind-pain h4 {
    font-size: 15px;
    font-weight: 600;
    margin: 0 0 4px;
    color: var(--text-primary);
}
.ind-pain p {
    margin: 0;
    font-size: 13.5px;
    color: var(--text-secondary);
    line-height: 1.65;
}
.ind-values {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.ind-value {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    background: rgba(16, 185, 129, 0.08);
    color: #4ade80;
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 999px;
    font-size: 13px;
}
.ind-cta {
    align-self: flex-start;
}

@media (max-width: 1024px) {
    .industry-wrapper {
        grid-template-columns: minmax(0, 1fr);
        gap: 36px;
    }
    .code-mockup { transform: none; }
    .industry-glow {
        width: 380px;
        height: 380px;
        top: -10%;
        left: -20%;
    }
    .ind-cta { align-self: stretch; justify-content: center; }
}

@media (max-width: 768px) {
    .industry { padding: 80px 0 70px; overflow-x: clip; }
    .industry .container { padding-left: 24px; padding-right: 24px; }
    .industry-wrapper { gap: 28px; margin-top: 36px; }

    .code-mockup { border-radius: 12px; }
    .code-header { padding: 8px 10px; gap: 10px; }
    .code-dots span { width: 9px; height: 9px; }
    .code-tabs { gap: 4px; flex-wrap: nowrap; }
    .code-tab { padding: 4px 8px; font-size: 11px; }
    .code-tab:not(.active) { display: none; }

    .code-body {
        padding: 12px 0 14px;
        font-size: 12px;
        line-height: 1.65;
        max-height: 300px;
        overflow-x: auto;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }
    .code-gutter {
        padding: 0 8px;
        font-size: 11px;
    }
    .code-content {
        padding: 0 12px;
        font-size: inherit;
    }
    .code-statusbar {
        padding: 5px 10px;
        gap: 10px;
        font-size: 10px;
        flex-wrap: wrap;
    }

    .ind-pain {
        padding: 14px 14px;
        gap: 12px;
    }
    .ind-pain-num {
        width: 32px;
        height: 32px;
        font-size: 12px;
        border-radius: 8px;
    }
    .ind-pain h4 {
        font-size: 14.5px;
        line-height: 1.4;
        word-break: break-word;
    }
    .ind-pain p { font-size: 13px; }

    .ind-values { gap: 8px; }
    .ind-value {
        font-size: 12px;
        padding: 6px 11px;
    }
}

@media (max-width: 480px) {
    .industry { padding: 60px 0 56px; }
    .industry .container { padding-left: 20px; padding-right: 20px; }
    .code-body { font-size: 11.5px; max-height: 260px; }
    .code-content { padding: 0 10px; }
    .code-gutter { padding: 0 6px; min-width: 26px; }
}

/* --- Footer --- */
.footer {
    border-top: 1px solid var(--border);
    padding: 60px 0 0;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    gap: 60px;
    padding-bottom: 40px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
}

.footer-links {
    display: flex;
    gap: 64px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    font-size: 14px;
    color: var(--text-muted);
    padding: 4px 0;
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--text);
}

.footer-bottom {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px 0;
    border-top: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-muted);
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    color: var(--text-muted);
    transition: var(--transition);
}

.footer-legal a:hover {
    color: var(--text-secondary);
}

.footer-copy {
    display: inline-flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 10px;
    color: var(--text-muted);
}

.footer-copy a {
    color: var(--text-muted);
    transition: var(--transition);
}

.footer-copy a:hover {
    color: var(--text-secondary);
}

.footer-copy .sep {
    color: var(--border);
}

/* --- Animations --- */
[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .features-grid,
    .modules-grid,
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .services-grid,
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .platforms-wrapper {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .platforms-content .section-title,
    .platforms-content .section-desc {
        text-align: center;
    }

    .platforms-content .section-desc {
        margin: 0 auto 36px;
    }

    .platform-list {
        max-width: 400px;
        margin: 0 auto;
    }

    .platforms-visual {
        justify-content: center;
    }

    .req-wrapper {
        flex-direction: column;
        text-align: center;
        padding: 36px 32px;
    }

    .req-specs {
        flex-wrap: wrap;
        justify-content: center;
    }

    .mockup-sidebar {
        display: none;
    }

    .mockup-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-stats {
        gap: 32px;
    }

    .pricing-card.featured {
        transform: none;
    }

    .pricing-card.featured:hover {
        transform: translateY(-4px);
    }
}

@media (max-width: 768px) {
    .navbar { position: fixed; }

    .nav-container { position: relative; }

    .nav-links {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        position: absolute;
        top: calc(100% + 1px);
        left: 12px;
        right: 12px;
        background: rgba(7, 11, 24, 0.96);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        border: 1px solid rgba(255, 255, 255, 0.06);
        border-radius: 14px;
        padding: 10px;
        max-height: calc(100vh - 90px);
        overflow-y: auto;
        opacity: 0;
        transform: translateY(-10px) scale(0.98);
        transform-origin: top right;
        pointer-events: none;
        transition: opacity 0.22s ease, transform 0.22s ease;
        z-index: 1000;
        box-shadow: 0 20px 50px rgba(0, 0, 0, 0.55);
    }
    .nav-links.open {
        opacity: 1;
        transform: translateY(0) scale(1);
        pointer-events: auto;
    }

    .nav-link {
        font-size: 15px;
        padding: 13px 16px;
        border-radius: 10px;
        text-align: left;
        color: var(--text-secondary);
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .nav-link::before {
        content: '';
        width: 4px;
        height: 4px;
        border-radius: 50%;
        background: rgba(129, 140, 248, 0.5);
        opacity: 0;
        transition: opacity 0.2s ease;
    }
    .nav-link:hover {
        background: rgba(99, 102, 241, 0.08);
        color: var(--text);
    }
    .nav-link.active {
        background: rgba(99, 102, 241, 0.14);
        color: #fff;
    }
    .nav-link.active::before { opacity: 1; }

    .nav-links.open ~ .nav-actions .mobile-toggle span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .nav-links.open ~ .nav-actions .mobile-toggle span:nth-child(2) {
        opacity: 0;
    }
    .nav-links.open ~ .nav-actions .mobile-toggle span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .mobile-toggle {
        display: flex;
        z-index: 1001;
        width: 38px;
        height: 38px;
        align-items: center;
        justify-content: center;
        border-radius: 10px;
    }
    .mobile-toggle:hover { background: rgba(255, 255, 255, 0.05); }

    .lang-switch {
        margin-right: 0;
        padding: 6px 10px;
        font-size: 12px;
    }

    .btn-nav { display: none; }

    .nav-backdrop {
        position: fixed;
        inset: 64px 0 0 0;
        background: rgba(2, 6, 23, 0.55);
        backdrop-filter: blur(2px);
        -webkit-backdrop-filter: blur(2px);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.22s ease;
        z-index: 998;
    }
    .nav-backdrop.show {
        opacity: 1;
        pointer-events: auto;
    }

    body.nav-open {
        overflow: hidden;
    }

    /* Hero */
    .hero {
        padding: 90px 0 40px;
        min-height: auto;
    }

    .hero-badge {
        font-size: 12px;
        padding: 5px 12px;
        margin-bottom: 24px;
    }

    .hero-desc br { display: none; }

    .hero-desc {
        font-size: 14px;
        margin-bottom: 32px;
    }

    .hero-stats {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 16px;
        justify-content: center;
    }

    .stat-item {
        min-width: 90px;
    }

    .stat-number {
        font-size: 26px;
    }

    .stat-suffix {
        font-size: 18px;
    }

    .stat-label {
        font-size: 11px;
    }

    .stat-divider {
        width: 1px;
        height: 32px;
    }

    /* Hero actions */
    .hero-actions {
        flex-direction: column;
        align-items: center;
        gap: 12px;
        margin-bottom: 40px;
    }

    .hero-actions .btn-lg {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    /* Mockup */
    .hero-visual {
        padding: 0 8px;
        margin-top: 32px;
    }

    .mockup-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .m-card {
        padding: 10px;
    }

    .m-card-value {
        font-size: 15px;
    }

    .m-card-label {
        font-size: 10px;
    }

    .chart-bars {
        height: 70px;
        gap: 5px;
    }

    /* Features - 2 columns on mobile */
    .features {
        padding: 80px 0;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .feature-card {
        padding: 20px;
    }

    .feature-icon {
        width: 40px;
        height: 40px;
        border-radius: 10px;
        margin-bottom: 14px;
    }

    .feature-icon svg {
        width: 20px;
        height: 20px;
    }

    .feature-title {
        font-size: 15px;
        margin-bottom: 6px;
    }

    .feature-desc {
        font-size: 12px;
        line-height: 1.6;
    }

    /* Modules - 2 columns on mobile */
    .modules {
        padding: 80px 0;
    }

    .modules-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .module-card {
        padding: 24px 20px;
    }

    .module-number {
        font-size: 36px;
        top: 14px;
        right: 16px;
    }

    .module-icon svg {
        width: 32px;
        height: 32px;
    }

    .module-card h3 {
        font-size: 15px;
    }

    .module-card p {
        font-size: 12px;
        line-height: 1.6;
    }

    /* Platforms */
    .platforms {
        padding: 80px 0;
        overflow: hidden;
    }

    .platforms-wrapper {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .platforms-content {
        text-align: center;
    }

    .platforms-content .section-tag {
        display: inline-block;
    }

    .platforms-content .section-title {
        font-size: 24px;
        text-align: center;
    }

    .platforms-content .section-desc {
        font-size: 13px;
        text-align: center;
        margin: 0 auto 28px;
        word-break: break-word;
        overflow-wrap: break-word;
    }

    .platform-list {
        gap: 10px;
        max-width: 100%;
        margin: 0 auto;
    }

    .platform-item {
        padding: 12px 16px;
    }

    .platform-icon {
        width: 38px;
        height: 38px;
    }

    .platforms-visual {
        gap: 12px;
        padding: 24px 0;
        justify-content: center;
        overflow: hidden;
        max-width: 100%;
    }

    .device-desktop { width: 52%; max-width: 180px; }
    .device-tablet { width: 28%; max-width: 100px; }
    .device-phone { width: 16%; max-width: 60px; }

    /* Pricing */
    .pricing {
        padding: 80px 0;
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        max-width: 400px;
        margin: 0 auto;
    }

    .pricing-card {
        padding: 32px 24px;
    }

    .price-amount {
        font-size: 40px;
    }

    .pricing-features {
        gap: 12px;
        margin-bottom: 24px;
    }

    /* Services - 2 columns */
    .services {
        padding: 80px 0;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .service-card {
        padding: 28px 16px;
    }

    .service-icon-wrapper {
        width: 56px;
        height: 56px;
        margin-bottom: 16px;
    }

    .service-icon svg {
        width: 26px;
        height: 26px;
    }

    .service-card h3 {
        font-size: 15px;
        margin-bottom: 6px;
    }

    .service-card p {
        font-size: 12px;
        line-height: 1.6;
    }

    /* Requirements */
    .requirements {
        padding: 40px 0;
    }

    .req-wrapper {
        padding: 24px 20px;
        gap: 24px;
    }

    .req-content h2 {
        font-size: 22px;
    }

    .req-specs {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
        width: 100%;
    }

    .req-item {
        gap: 10px;
    }

    .req-icon {
        width: 36px;
        height: 36px;
    }

    .req-icon svg {
        width: 18px;
        height: 18px;
    }

    .req-item strong {
        font-size: 13px;
    }

    .req-item span {
        font-size: 11px;
    }

    /* CTA */
    .cta {
        padding: 64px 0;
    }

    .cta h2 {
        font-size: 24px;
    }

    .cta p {
        font-size: 14px;
        margin-bottom: 28px;
    }

    .cta-actions {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    .cta-actions .btn-lg {
        width: 100%;
        max-width: 300px;
        justify-content: center;
        font-size: 14px;
    }

    /* Contact - 2 columns */
    .contact {
        padding: 80px 0;
    }

    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .contact-card {
        padding: 24px 16px;
    }

    .contact-icon {
        width: 44px;
        height: 44px;
        border-radius: 12px;
        margin-bottom: 12px;
    }

    .contact-card h4 {
        font-size: 14px;
        margin-bottom: 6px;
    }

    .contact-card p {
        font-size: 13px;
        word-break: break-all;
    }

    /* Footer */
    .footer {
        padding-top: 40px;
    }

    .footer-top {
        flex-direction: column;
        gap: 32px;
    }

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

    .footer-col h4 {
        font-size: 13px;
        margin-bottom: 12px;
    }

    .footer-col a {
        font-size: 13px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
        padding: 16px 0;
        font-size: 12px;
    }

    .footer-legal {
        flex-direction: column;
        gap: 4px;
        font-size: 12px;
    }

    /* Section headers */
    .section-header {
        margin-bottom: 40px;
    }

    .section-title {
        font-size: 24px;
    }

    .section-desc {
        font-size: 14px;
    }

    .section-tag {
        font-size: 12px;
        padding: 3px 12px;
    }
}

@media (max-width: 360px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 28px;
    }

    .features-grid,
    .modules-grid,
    .services-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .req-specs {
        grid-template-columns: 1fr;
    }

    .stat-divider {
        display: none;
    }

    .hero-stats {
        gap: 12px;
    }

    .platforms-visual {
        gap: 8px;
    }

    .device-desktop { width: 150px; }
    .device-tablet { width: 80px; }
    .device-phone { width: 50px; }
}

/* ========================================
   数字化大屏 (产品演示)
   ======================================== */
.demo-screen {
    position: relative;
    padding: 100px 0 120px;
    overflow: hidden;
    background: linear-gradient(180deg, #030712 0%, #050a1a 60%, #030712 100%);
}
.demo-bg { position: absolute; inset: 0; pointer-events: none; }
.demo-grid-bg {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(99,102,241,.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99,102,241,.08) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse at center, black 0%, black 50%, transparent 85%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 0%, black 50%, transparent 85%);
}
.demo-glow { position: absolute; border-radius: 50%; filter: blur(80px); opacity: .35; }
.demo-glow-1 { width: 520px; height: 520px; background: #6366f1; top: -120px; left: -80px; }
.demo-glow-2 { width: 520px; height: 520px; background: #06b6d4; bottom: -120px; right: -80px; }

.bigscreen {
    position: relative;
    margin-top: 48px;
    max-width: 1160px;
    margin-left: auto;
    margin-right: auto;
}
.bigscreen-frame {
    position: relative;
    border-radius: 20px;
    padding: 0;
    background:
        linear-gradient(180deg, rgba(17,24,39,.92) 0%, rgba(3,7,18,.92) 100%);
    border: 1px solid rgba(99,102,241,.35);
    box-shadow:
        0 0 0 1px rgba(99,102,241,.18),
        0 30px 80px -20px rgba(99,102,241,.35),
        0 0 120px -30px rgba(34,211,238,.3),
        inset 0 1px 0 rgba(255,255,255,.06);
    overflow: hidden;
}
.bigscreen-frame::before {
    content: "";
    position: absolute; inset: 0;
    padding: 1px;
    border-radius: 20px;
    background: linear-gradient(135deg, rgba(99,102,241,.6), rgba(34,211,238,.4), rgba(236,72,153,.4));
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
            mask-composite: exclude;
    pointer-events: none;
    opacity: .6;
}

.bigscreen-topbar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 22px;
    background: linear-gradient(180deg, rgba(99,102,241,.12), rgba(99,102,241,.02));
    border-bottom: 1px solid rgba(255,255,255,.06);
    font-size: 13px;
}
.topbar-brand {
    color: #e2e8f0; font-weight: 600;
    letter-spacing: .5px;
}
.topbar-center { display: flex; align-items: center; gap: 8px; color: #94a3b8; }
.live-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: #10b981;
    box-shadow: 0 0 10px #10b981;
    animation: bs-blink 1.4s infinite;
}
@keyframes bs-blink { 0%, 100% { opacity: 1; } 50% { opacity: .3; } }
.topbar-time {
    font-family: "SFMono-Regular", Consolas, monospace;
    color: #22d3ee;
    font-weight: 600;
    letter-spacing: 1px;
}

.bigscreen-stage {
    position: relative;
    aspect-ratio: 16 / 9;
    padding: 28px;
}
.bs-slide {
    position: absolute;
    inset: 28px;
    display: flex; flex-direction: column; gap: 18px;
    opacity: 0;
    transform: scale(.98);
    transition: opacity .8s ease, transform .8s ease;
    pointer-events: none;
}
.bs-slide.active {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
}
.bs-slide-title {
    font-size: 18px; font-weight: 700;
    color: #e2e8f0;
    letter-spacing: 1px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255,255,255,.06);
    display: flex; align-items: center; gap: 10px;
}
.bs-slide-title::before {
    content: "";
    width: 4px; height: 16px;
    background: linear-gradient(180deg, #6366f1, #22d3ee);
    border-radius: 2px;
}

/* KPI */
.bs-kpis {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}
.bs-kpi {
    position: relative;
    padding: 14px 16px;
    border-radius: 12px;
    background: linear-gradient(160deg, rgba(99,102,241,.12), rgba(34,211,238,.04));
    border: 1px solid rgba(99,102,241,.22);
    display: flex; flex-direction: column; gap: 4px;
    overflow: hidden;
}
.bs-kpi::after {
    content: "";
    position: absolute; right: -20px; bottom: -20px;
    width: 80px; height: 80px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99,102,241,.35), transparent 70%);
    filter: blur(12px);
}
.bs-kpi-label { font-size: 12px; color: #94a3b8; letter-spacing: .5px; }
.bs-kpi-value {
    font-size: 24px; font-weight: 800;
    color: #f8fafc;
    font-family: "SFMono-Regular", Consolas, monospace;
    letter-spacing: .5px;
}
.bs-kpi-trend {
    font-size: 11px; font-weight: 600;
    padding: 2px 8px; border-radius: 999px;
    align-self: flex-start;
}
.bs-kpi-trend.up { color: #10b981; background: rgba(16,185,129,.12); }
.bs-kpi-trend.down { color: #ec4899; background: rgba(236,72,153,.12); }
.bs-kpi-trend.warn { color: #f59e0b; background: rgba(245,158,11,.14); }

/* Panels */
.bs-row {
    display: grid;
    grid-template-columns: 1.6fr 1fr;
    gap: 14px;
    flex: 1;
    min-height: 0;
}
.bs-panel {
    padding: 14px 16px;
    border-radius: 12px;
    background: rgba(255,255,255,.02);
    border: 1px solid rgba(255,255,255,.06);
    display: flex; flex-direction: column;
    min-height: 0;
}
.bs-panel-title {
    font-size: 12px; font-weight: 600;
    color: #cbd5e1;
    letter-spacing: .5px;
    margin-bottom: 8px;
    display: flex; align-items: center; gap: 6px;
}
.bs-panel-title::before {
    content: ""; width: 3px; height: 12px;
    background: #22d3ee; border-radius: 2px;
}
.bs-chart, .bs-donut, .bs-map, .bs-gauge { width: 100%; flex: 1; min-height: 0; }
.bs-panel-donut, .bs-panel-gauge {
    align-items: center; justify-content: center;
    text-align: center;
}
.bs-legend {
    display: flex; gap: 12px; justify-content: center;
    font-size: 11px; color: #94a3b8;
    margin-top: 4px;
}
.bs-legend i {
    display: inline-block;
    width: 10px; height: 10px;
    border-radius: 3px;
    margin-right: 4px; vertical-align: middle;
}

/* Heatmap */
.bs-heatmap {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: repeat(6, 1fr);
    gap: 3px;
    min-height: 0;
}
.bs-heatmap::before {
    content: "";
    grid-column: 1 / -1; grid-row: 1 / -1;
    /* gradient mosaic via multiple box shadows simulated with background layers */
}
/* generate heatmap cells via repeated pseudo using background — simpler approach: 72 cells via CSS grid items generated with nth-of-type gradients */
.bs-heatmap {
    background:
        radial-gradient(circle at 10% 20%, rgba(236,72,153,.6), transparent 14%),
        radial-gradient(circle at 32% 40%, rgba(245,158,11,.55), transparent 14%),
        radial-gradient(circle at 55% 30%, rgba(34,211,238,.55), transparent 14%),
        radial-gradient(circle at 72% 60%, rgba(99,102,241,.7), transparent 14%),
        radial-gradient(circle at 88% 25%, rgba(16,185,129,.55), transparent 14%),
        radial-gradient(circle at 20% 75%, rgba(99,102,241,.55), transparent 14%),
        radial-gradient(circle at 50% 80%, rgba(34,211,238,.55), transparent 14%),
        radial-gradient(circle at 82% 85%, rgba(236,72,153,.45), transparent 14%),
        linear-gradient(rgba(255,255,255,.03), rgba(255,255,255,.03));
    background-size: 100% 100%;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}
.bs-heatmap::after {
    content: "";
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
    background-size: 8.33% 16.66%;
}

/* Pulse */
.bs-pulse { animation: bs-pulse 2s ease-out infinite; transform-origin: 200px 80px; }
@keyframes bs-pulse {
    0% { r: 6; opacity: 1; }
    100% { r: 24; opacity: 0; }
}

/* Purchase list */
.bs-list { list-style: none; margin: 0; padding: 0; flex: 1; overflow: hidden; }
.bs-list li {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 4px;
    font-size: 12px;
    border-bottom: 1px dashed rgba(255,255,255,.06);
}
.bs-list li:last-child { border-bottom: 0; }
.bs-list-tag {
    font-size: 10px; font-weight: 700;
    padding: 2px 8px; border-radius: 4px;
    white-space: nowrap;
}
.bs-list-tag.ok { color: #10b981; background: rgba(16,185,129,.14); }
.bs-list-tag.in { color: #22d3ee; background: rgba(34,211,238,.14); }
.bs-list-tag.warn { color: #f59e0b; background: rgba(245,158,11,.16); }
.bs-list-txt { flex: 1; color: #cbd5e1; font-family: "SFMono-Regular", Consolas, monospace; }
.bs-list-val { color: #f8fafc; font-weight: 700; }

/* Dots */
.bigscreen-dots {
    display: flex; justify-content: center; gap: 10px;
    padding: 14px 22px 20px;
    background: rgba(3,7,18,.6);
    border-top: 1px solid rgba(255,255,255,.05);
    flex-wrap: wrap;
}
.bs-dot {
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.08);
    color: #94a3b8;
    font-size: 12px; font-weight: 500;
    padding: 6px 14px;
    border-radius: 999px;
    cursor: pointer;
    transition: all .3s;
    font-family: inherit;
}
.bs-dot:hover { color: #e2e8f0; border-color: rgba(99,102,241,.4); }
.bs-dot.active {
    color: #f8fafc;
    background: linear-gradient(135deg, #6366f1, #22d3ee);
    border-color: transparent;
    box-shadow: 0 6px 18px -4px rgba(99,102,241,.6);
}

/* Responsive */
@media (max-width: 960px) {
    .bigscreen-stage { aspect-ratio: auto; padding: 18px; }
    .bs-slide { position: relative; inset: auto; opacity: 1; transform: none; display: none; }
    .bs-slide.active { display: flex; }
    .bs-kpis { grid-template-columns: repeat(2, 1fr); }
    .bs-row { grid-template-columns: 1fr; }
    .bs-panel-line .bs-chart, .bs-panel-stack .bs-chart { height: 140px; }
}
@media (max-width: 600px) {
    .demo-screen { padding: 60px 0 80px; }
    .bigscreen-topbar { padding: 10px 14px; font-size: 11px; flex-wrap: wrap; gap: 6px; }
    .topbar-brand { font-size: 12px; }
    .bs-kpi-value { font-size: 18px; }
    .bs-slide-title { font-size: 15px; }
    .bigscreen-dots { padding: 12px 10px 14px; gap: 6px; }
    .bs-dot { padding: 5px 10px; font-size: 11px; }
}