:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --accent: #f59e0b;
    --accent-dark: #d97706;
    --text: #1e293b;
    --text-light: #64748b;
    --text-lighter: #94a3b8;
    --bg: #ffffff;
    --bg-light: #f8fafc;
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
    --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.25);
    --radius-sm: 6px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: all 0.3s ease;
    --header-h: 72px;
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

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

ul, ol {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    gap: 8px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.35);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255,255,255,0.5);
}

.btn-outline:hover {
    background: #fff;
    color: var(--primary);
    border-color: #fff;
    transform: translateY(-2px);
}

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
}

.btn-lg {
    padding: 14px 36px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

.section {
    padding: 100px 0;
}

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

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--primary-50);
    color: var(--primary);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-desc {
    font-size: 16px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-h);
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.header.scrolled {
    border-bottom-color: var(--border);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-h);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: var(--text);
}

.logo-icon {
    font-size: 28px;
    color: var(--accent);
}

.logo-text {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-light);
    border-radius: var(--radius-sm);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

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

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1e3a5f 50%, var(--bg-dark) 100%);
    overflow: hidden;
    padding-top: var(--header-h);
}

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

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

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
    padding: 60px 0;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(37, 99, 235, 0.2);
    border: 1px solid rgba(37, 99, 235, 0.3);
    color: var(--primary-light);
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 52px;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-desc {
    font-size: 17px;
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
    margin-bottom: 36px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding-top: 40px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

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

.stat-num {
    display: inline;
    font-size: 36px;
    font-weight: 800;
    color: #fff;
}

.stat-unit {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    display: block;
    font-size: 14px;
    color: rgba(255,255,255,0.5);
    margin-top: 4px;
}

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: rgba(255,255,255,0.4);
    font-size: 12px;
    z-index: 2;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid rgba(255,255,255,0.4);
    border-bottom: 2px solid rgba(255,255,255,0.4);
    transform: rotate(45deg);
    margin: 8px auto 0;
    animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: rotate(45deg) translateY(0); }
    50% { transform: rotate(45deg) translateY(8px); }
}

.partner-section {
    margin-top: 60px;
    padding-top: 60px;
    border-top: 1px solid var(--border);
}

.partner-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 60px;
    background: linear-gradient(135deg, var(--primary-50) 0%, var(--bg-light) 100%);
    border-radius: var(--radius-lg);
    padding: 40px 60px;
}

.partner-info {
    text-align: left;
    max-width: 400px;
}

.partner-info h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
}

.partner-info p {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
}

.partner-qr {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.partner-qr img {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    background: #fff;
    padding: 12px;
}

.qr-label {
    font-size: 14px;
    color: var(--primary);
    font-weight: 600;
}

@media (max-width: 768px) {
    .partner-content {
        flex-direction: column;
        gap: 30px;
        padding: 30px 24px;
    }

    .partner-info {
        text-align: center;
    }
}

.services {
    background: var(--bg-light);
}

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

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

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 56px;
    height: 56px;
    background: var(--primary-50);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--primary);
}

.service-icon svg {
    width: 28px;
    height: 28px;
}

.service-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
}

.service-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.service-link:hover {
    gap: 8px;
}

.platform {
    background: #fff;
}

.platform-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

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

.platform-content .section-title {
    text-align: left;
    margin-bottom: 20px;
}

.platform-desc {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 32px;
}

.platform-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 36px;
}

.feature-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.feature-icon {
    width: 32px;
    height: 32px;
    background: var(--primary-50);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

.feature-info h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.feature-info p {
    font-size: 13px;
    color: var(--text-light);
}

.platform-visual {
    position: relative;
}

.platform-screen {
    background: var(--bg-dark);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 1px solid rgba(255,255,255,0.1);
}

.screen-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

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

.screen-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.15);
}

.screen-dots span:first-child { background: #ff5f57; }
.screen-dots span:nth-child(2) { background: #febc2e; }
.screen-dots span:nth-child(3) { background: #28c840; }

.screen-title {
    font-size: 12px;
    color: rgba(255,255,255,0.5);
}

.screen-content {
    display: flex;
    height: 300px;
}

.screen-sidebar {
    width: 50px;
    background: rgba(255,255,255,0.03);
    border-right: 1px solid rgba(255,255,255,0.08);
    padding: 12px 8px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-item {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,0.05);
}

.sidebar-item.active {
    background: rgba(37, 99, 235, 0.3);
}

.screen-main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.canvas-area {
    flex: 1;
    position: relative;
    background: linear-gradient(45deg, rgba(255,255,255,0.02) 25%, transparent 25%),
                linear-gradient(-45deg, rgba(255,255,255,0.02) 25%, transparent 25%),
                linear-gradient(45deg, transparent 75%, rgba(255,255,255,0.02) 75%),
                linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.02) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

.annotation-box {
    position: absolute;
    border: 2px solid;
    border-radius: 4px;
}

.box1 {
    top: 30%;
    left: 15%;
    width: 80px;
    height: 120px;
    border-color: #3b82f6;
    background: rgba(59, 130, 246, 0.1);
}

.box2 {
    top: 40%;
    left: 50%;
    width: 100px;
    height: 60px;
    border-color: #22c55e;
    background: rgba(34, 197, 94, 0.1);
}

.box3 {
    top: 20%;
    right: 15%;
    width: 50px;
    height: 50px;
    border-color: #f59e0b;
    background: rgba(245, 158, 11, 0.1);
}

.label-tag {
    position: absolute;
    padding: 2px 8px;
    font-size: 11px;
    font-weight: 600;
    color: #fff;
    border-radius: 3px;
}

.tag1 {
    top: 27%;
    left: 15%;
    background: #3b82f6;
}

.tag2 {
    top: 37%;
    left: 50%;
    background: #22c55e;
}

.tag3 {
    top: 17%;
    right: 15%;
    background: #f59e0b;
}

.screen-toolbar {
    display: flex;
    gap: 6px;
    padding: 8px 12px;
    background: rgba(255,255,255,0.05);
    border-top: 1px solid rgba(255,255,255,0.08);
}

.tool-btn {
    width: 28px;
    height: 28px;
    border-radius: 4px;
    background: rgba(255,255,255,0.08);
}

.tool-btn.active {
    background: rgba(37, 99, 235, 0.4);
}

.platform-float-card {
    position: absolute;
    background: #fff;
    padding: 12px 20px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 600;
    animation: float 3s ease-in-out infinite;
}

.platform-float-card .float-icon {
    font-size: 20px;
}

.card1 {
    top: 10%;
    right: -20px;
    animation-delay: 0s;
}

.card2 {
    bottom: 15%;
    left: -20px;
    animation-delay: 1.5s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.solutions {
    background: var(--bg-light);
}

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

.solution-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-height: 240px;
    transition: var(--transition);
    cursor: pointer;
}

.solution-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--bg-dark), #1e3a5f);
    transition: transform 0.6s ease;
}

.solution-card:hover .solution-bg {
    transform: scale(1.05);
}

.solution-card:nth-child(2) .solution-bg { background: linear-gradient(135deg, #1a237e, #283593); }
.solution-card:nth-child(3) .solution-bg { background: linear-gradient(135deg, #004d40, #00695c); }
.solution-card:nth-child(4) .solution-bg { background: linear-gradient(135deg, #b71c1c, #c62828); }
.solution-card:nth-child(5) .solution-bg { background: linear-gradient(135deg, #e65100, #ef6c00); }
.solution-card:nth-child(6) .solution-bg { background: linear-gradient(135deg, #4a148c, #6a1b9a); }

.solution-info {
    position: relative;
    z-index: 2;
    padding: 32px;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.solution-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
    color: rgba(255,255,255,0.9);
}

.solution-icon svg {
    width: 100%;
    height: 100%;
}

.solution-info h3 {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.solution-info p {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
    flex: 1;
}

.solution-count {
    display: inline-block;
    margin-top: 16px;
    padding: 4px 12px;
    background: rgba(255,255,255,0.15);
    border-radius: 50px;
    font-size: 12px;
    color: rgba(255,255,255,0.9);
    font-weight: 600;
    width: fit-content;
}

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

.solution-main {
    grid-column: span 3;
    min-height: 280px;
}

.data-flow {
    background: #fff;
}

.flow-timeline {
    display: flex;
    justify-content: space-between;
    position: relative;
    padding: 40px 0;
}

.flow-line {
    position: absolute;
    top: 50%;
    left: 5%;
    right: 5%;
    height: 2px;
    background: var(--border);
    transform: translateY(-50%);
}

.flow-step {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    flex: 1;
}

.flow-dot {
    width: 48px;
    height: 48px;
    background: #fff;
    border: 3px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    transition: var(--transition);
}

.flow-step:hover .flow-dot {
    background: var(--primary);
    color: #fff;
    transform: scale(1.1);
}

.flow-card {
    text-align: center;
    padding: 16px;
}

.flow-card h4 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 6px;
}

.flow-card p {
    font-size: 13px;
    color: var(--text-light);
}

.advantages {
    background: var(--bg-light);
}

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

.advantage-card {
    background: #fff;
    padding: 36px;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-100);
}

.advantage-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    background: var(--primary-50);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    transition: var(--transition);
}

.advantage-card:hover .advantage-icon {
    background: var(--primary);
    color: #fff;
}

.advantage-icon svg {
    width: 36px;
    height: 36px;
}

.advantage-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

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

.partners {
    padding: 60px 0;
    background: #fff;
    overflow: hidden;
}

.partners-marquee {
    overflow: hidden;
    mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}

.marquee-track {
    display: flex;
    gap: 40px;
    animation: marquee 30s linear infinite;
    width: max-content;
}

.partner-logo {
    padding: 16px 32px;
    background: var(--bg-light);
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 700;
    color: var(--text-light);
    white-space: nowrap;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.partner-logo:hover {
    color: var(--primary);
    border-color: var(--primary-100);
    background: var(--primary-50);
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.news {
    background: #fff;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.news-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--border);
}

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

.news-featured {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.news-image {
    background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.news-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-placeholder {
    width: 80px;
    height: 80px;
    color: var(--primary);
    opacity: 0.5;
}

.news-placeholder svg {
    width: 100%;
    height: 100%;
}

.news-info {
    padding: 28px;
}

.news-date {
    font-size: 13px;
    color: var(--text-lighter);
    margin-bottom: 10px;
    display: block;
}

.news-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-featured .news-title {
    font-size: 22px;
}

.news-excerpt {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
}

.news-link:hover {
    color: var(--primary-dark);
}

.contact {
    background: var(--bg-light);
}

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info .section-tag {
    margin-bottom: 16px;
}

.contact-info .section-title {
    text-align: left;
    margin-bottom: 20px;
}

.contact-desc {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 36px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 14px;
    color: var(--text-light);
}

.contact-form-wrap {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.contact-form h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 28px;
    text-align: center;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg-light);
}

.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);
    background: #fff;
}

.form-group textarea {
    resize: vertical;
}

.footer {
    background: var(--bg-dark);
    color: rgba(255,255,255,0.7);
    padding: 60px 0 0;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    padding-bottom: 40px;
}

.footer .logo {
    margin-bottom: 20px;
}

.footer .logo-text {
    -webkit-text-fill-color: #fff;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 24px;
    color: rgba(255,255,255,0.5);
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.7);
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary);
    color: #fff;
}

.social-link svg {
    width: 18px;
    height: 18px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-col a {
    font-size: 14px;
    color: rgba(255,255,255,0.5);
}

.footer-col a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 1024px) {
    .hero-title {
        font-size: 40px;
    }

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

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

    .platform-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .platform-visual {
        order: -1;
    }

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

    .solution-main {
        grid-column: span 2;
    }

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

    .news-featured {
        grid-column: span 2;
        grid-template-columns: 1fr;
    }

    .contact-layout {
        grid-template-columns: 1fr;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }

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

    .nav {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-link {
        width: 100%;
        padding: 12px 16px;
    }

    .menu-toggle {
        display: flex;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .header-right .btn {
        display: none;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .stat-num {
        font-size: 28px;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .solutions-grid {
        grid-template-columns: 1fr;
    }

    .solution-main {
        grid-column: span 1;
    }

    .flow-timeline {
        flex-direction: column;
        gap: 24px;
    }

    .flow-line {
        top: 0;
        bottom: 0;
        left: 24px;
        right: auto;
        width: 2px;
        height: auto;
        transform: none;
    }

    .flow-step {
        flex-direction: row;
        gap: 20px;
    }

    .flow-card {
        text-align: left;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .news-grid {
        grid-template-columns: 1fr;
    }

    .news-featured {
        grid-column: span 1;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 26px;
    }

    .hero-actions {
        flex-direction: column;
    }

    .btn-lg {
        width: 100%;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .contact-form-wrap {
        padding: 24px;
    }
}