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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, Noto Sans SC, sans-serif;
    background: #f8fafc;
    color: #1e293b;
    line-height: 1.7;
    overflow-x: hidden;
}

a {
    color: #1a73e8;
    text-decoration: none;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

header {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: box-shadow 0.3s, background 0.3s;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: #1a73e8;
    transition: transform 0.3s;
}

.logo:hover {
    transform: scale(1.02);
}

.logo svg {
    width: 36px;
    height: 36px;
}

.nav {
    display: flex;
    gap: 24px;
    align-items: center;
}

.nav a {
    font-size: 0.95rem;
    color: #334155;
    transition: color 0.2s, transform 0.2s;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #1a73e8;
    transition: width 0.3s;
}

.nav a:hover {
    color: #1a73e8;
    transform: translateY(-1px);
}

.nav a:hover::after {
    width: 100%;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: #1e293b;
    padding: 4px;
    transition: transform 0.2s;
}

.menu-toggle:hover {
    transform: rotate(90deg);
}

.search-box {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(241, 245, 249, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 8px;
    padding: 6px 12px;
    transition: box-shadow 0.3s;
}

.search-box:focus-within {
    box-shadow: 0 0 0 2px #1a73e8;
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    font-size: 0.9rem;
    width: 160px;
    color: #1e293b;
}

.search-box button {
    background: none;
    border: none;
    cursor: pointer;
    color: #64748b;
    font-size: 1.1rem;
    transition: color 0.2s;
}

.search-box button:hover {
    color: #1a73e8;
}

.dark-mode-toggle {
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(203, 213, 225, 0.5);
    border-radius: 8px;
    padding: 6px 10px;
    cursor: pointer;
    font-size: 0.9rem;
    color: #334155;
    transition: all 0.2s;
}

.dark-mode-toggle:hover {
    background: rgba(226, 232, 240, 0.7);
    transform: scale(1.05);
}

.breadcrumb {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 12px 0;
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
    font-size: 0.85rem;
    color: #64748b;
}

.breadcrumb a {
    color: #1a73e8;
    transition: color 0.2s;
}

.breadcrumb a:hover {
    color: #0d47a1;
}

.breadcrumb span {
    color: #94a3b8;
}

.hero {
    background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 50%, #4a90e2 100%);
    color: #fff;
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: heroGlow 8s ease-in-out infinite;
}

@keyframes heroGlow {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -20px); }
}

.hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.2;
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 30px;
    opacity: 0.95;
    position: relative;
    z-index: 1;
}

.hero .cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.hero .btn {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: #1a73e8;
    padding: 12px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}

.hero .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    background: #fff;
}

.hero .btn-outline {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.8);
    color: #fff;
}

.hero .btn-outline:hover {
    background: rgba(255, 255, 255, 0.9);
    color: #1a73e8;
    border-color: #fff;
}

section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 48px;
}

.section-title h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 12px;
}

.section-title p {
    color: #64748b;
    max-width: 600px;
    margin: 0 auto;
}

.brand-intro {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.brand-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.brand-grid img {
    width: 100%;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.brand-text h3 {
    font-size: 1.6rem;
    margin-bottom: 16px;
    color: #0f172a;
}

.brand-text p {
    margin-bottom: 12px;
    color: #475569;
}

.products {
    background: rgba(241, 245, 249, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.product-card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
    border: 1px solid rgba(226, 232, 240, 0.3);
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 30px rgba(26, 115, 232, 0.15);
}

.product-card svg {
    width: 64px;
    height: 64px;
    margin-bottom: 12px;
    transition: transform 0.3s;
}

.product-card:hover svg {
    transform: scale(1.1);
}

.product-card h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: #0f172a;
}

.product-card p {
    color: #475569;
    font-size: 0.95rem;
}

.solutions {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.solution-item {
    background: rgba(248, 250, 252, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 12px;
    padding: 24px;
    border-left: 4px solid #1a73e8;
    transition: transform 0.3s, box-shadow 0.3s;
}

.solution-item:hover {
    transform: translateX(4px);
    box-shadow: 0 4px 15px rgba(26, 115, 232, 0.1);
}

.solution-item h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: #0f172a;
}

.solution-item p {
    color: #475569;
    font-size: 0.95rem;
}

.use-cases {
    background: rgba(241, 245, 249, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.case-card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(226, 232, 240, 0.3);
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(26, 115, 232, 0.1);
}

.case-card svg {
    width: 48px;
    height: 48px;
    margin-bottom: 10px;
    transition: transform 0.3s;
}

.case-card:hover svg {
    transform: scale(1.15);
}

.case-card h3 {
    font-size: 1rem;
    margin-bottom: 6px;
    color: #0f172a;
}

.case-card p {
    color: #475569;
    font-size: 0.9rem;
}

.faq {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
    padding: 18px 0;
    cursor: pointer;
    transition: background 0.3s;
}

.faq-item:hover {
    background: rgba(241, 245, 249, 0.3);
    border-radius: 8px;
    padding-left: 8px;
    padding-right: 8px;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1.05rem;
    color: #0f172a;
}

.faq-question span {
    font-size: 1.4rem;
    transition: transform 0.3s;
    color: #1a73e8;
}

.faq-answer {
    padding-top: 12px;
    color: #475569;
    line-height: 1.8;
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-item.active .faq-question span {
    transform: rotate(45deg);
}

.howto {
    background: rgba(241, 245, 249, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.howto-steps {
    max-width: 700px;
    margin: 0 auto;
    counter-reset: step;
}

.step {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    align-items: flex-start;
}

.step-number {
    background: linear-gradient(135deg, #1a73e8, #0d47a1);
    color: #fff;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
    transition: transform 0.3s;
}

.step:hover .step-number {
    transform: scale(1.1);
}

.step-content h3 {
    font-size: 1.1rem;
    margin-bottom: 4px;
    color: #0f172a;
}

.step-content p {
    color: #475569;
    font-size: 0.95rem;
}

.articles {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.article-card {
    background: rgba(248, 250, 252, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 12px;
    padding: 20px;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(226, 232, 240, 0.3);
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(26, 115, 232, 0.1);
}

.article-card .meta {
    font-size: 0.8rem;
    color: #94a3b8;
    margin-bottom: 8px;
}

.article-card h3 {
    font-size: 1.05rem;
    margin-bottom: 8px;
    color: #0f172a;
    transition: color 0.2s;
}

.article-card:hover h3 {
    color: #1a73e8;
}

.article-card p {
    color: #475569;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.article-card .read-more {
    color: #1a73e8;
    font-weight: 500;
    font-size: 0.9rem;
    transition: gap 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.article-card .read-more:hover {
    gap: 8px;
}

.testimonials {
    background: rgba(241, 245, 249, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.testimonial-card {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(226, 232, 240, 0.3);
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(26, 115, 232, 0.1);
}

.testimonial-card .quote {
    font-style: italic;
    color: #475569;
    margin-bottom: 12px;
    position: relative;
    padding-left: 16px;
}

.testimonial-card .quote::before {
    content: '"';
    position: absolute;
    left: 0;
    top: -4px;
    font-size: 1.5rem;
    color: #1a73e8;
    opacity: 0.5;
}

.testimonial-card .author {
    font-weight: 600;
    color: #0f172a;
}

.contact {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info h3 {
    font-size: 1.3rem;
    margin-bottom: 16px;
    color: #0f172a;
}

.contact-info p {
    margin-bottom: 8px;
    color: #475569;
}

.contact-info .label {
    font-weight: 600;
    color: #1e293b;
}

footer {
    background: linear-gradient(135deg, #0f172a, #1e293b);
    color: #cbd5e1;
    padding: 40px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.footer-grid h4 {
    color: #fff;
    margin-bottom: 12px;
    font-size: 1rem;
    position: relative;
    display: inline-block;
}

.footer-grid h4::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 30px;
    height: 2px;
    background: #1a73e8;
}

.footer-grid a {
    display: block;
    color: #94a3b8;
    margin-bottom: 6px;
    font-size: 0.9rem;
    transition: color 0.2s, transform 0.2s;
}

.footer-grid a:hover {
    color: #fff;
    transform: translateX(4px);
}

.footer-bottom {
    border-top: 1px solid #1e293b;
    padding-top: 20px;
    text-align: center;
    font-size: 0.85rem;
    color: #64748b;
}

.footer-bottom a {
    color: #94a3b8;
    transition: color 0.2s;
}

.footer-bottom a:hover {
    color: #1a73e8;
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: linear-gradient(135deg, #1a73e8, #0d47a1);
    color: #fff;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 999;
    border: none;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(26, 115, 232, 0.3);
}

body.dark {
    background: #0f172a;
    color: #e2e8f0;
}

body.dark header {
    background: rgba(30, 41, 59, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-color: rgba(51, 65, 85, 0.5);
}

body.dark .nav a {
    color: #cbd5e1;
}

body.dark .search-box {
    background: rgba(51, 65, 85, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

body.dark .search-box input {
    color: #e2e8f0;
}

body.dark .breadcrumb {
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-color: rgba(51, 65, 85, 0.5);
    color: #94a3b8;
}

body.dark .brand-intro,
body.dark .solutions,
body.dark .faq,
body.dark .articles,
body.dark .contact,
body.dark .product-card,
body.dark .case-card,
body.dark .testimonial-card,
body.dark .solution-item,
body.dark .article-card {
    background: rgba(30, 41, 59, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-color: rgba(51, 65, 85, 0.3);
}

body.dark .section-title h2,
body.dark .brand-text h3,
body.dark .product-card h3,
body.dark .solution-item h3,
body.dark .case-card h3,
body.dark .faq-question,
body.dark .testimonial-card .author,
body.dark .contact-info h3 {
    color: #f1f5f9;
}

body.dark .brand-text p,
body.dark .product-card p,
body.dark .solution-item p,
body.dark .case-card p,
body.dark .faq-answer,
body.dark .testimonial-card .quote,
body.dark .contact-info p {
    color: #94a3b8;
}

body.dark .dark-mode-toggle {
    border-color: rgba(71, 85, 105, 0.5);
    color: #e2e8f0;
    background: rgba(51, 65, 85, 0.5);
}

body.dark .products,
body.dark .use-cases,
body.dark .howto,
body.dark .testimonials {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

body.dark .hero {
    background: linear-gradient(135deg, #0d47a1, #1a73e8, #4a90e2);
}

@media (max-width: 768px) {
    .header-inner {
        flex-wrap: wrap;
        gap: 12px;
    }

    .nav {
        display: none;
        flex-direction: column;
        width: 100%;
        gap: 12px;
        padding: 12px 0;
    }

    .nav.open {
        display: flex;
    }

    .menu-toggle {
        display: block;
    }

    .search-box input {
        width: 120px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

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

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

    .section-title h2 {
        font-size: 1.6rem;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 40px 0;
    }

    .hero h1 {
        font-size: 1.6rem;
    }

    .container {
        padding: 0 12px;
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s, transform 0.6s;
}

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

.number-highlight {
    font-size: 2.5rem;
    font-weight: 800;
    color: #1a73e8;
    display: inline-block;
}