/* ===== CSS Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #ff6b6b;
    --primary-dark: #e05555;
    --bg-dark: #0f0f1a;
    --bg-card: rgba(255,255,255,0.06);
    --bg-glass: rgba(255,255,255,0.08);
    --text-primary: #f0f0f5;
    --text-secondary: #b0b0c0;
    --text-muted: #7a7a8a;
    --border-glass: rgba(255,255,255,0.12);
    --shadow: 0 8px 32px rgba(0,0,0,0.4);
    --radius: 20px;
    --radius-sm: 12px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-base: 'Segoe UI', 'PingFang SC', Roboto, 'Helvetica Neue', sans-serif;
}

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

body {
    font-family: var(--font-base);
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
}

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

a:hover {
    color: #ff9a9a;
}

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

ul, ol {
    list-style: none;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 10px;
}

/* ===== Animations ===== */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-40px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes pulseGlow {
    0%, 100% { box-shadow: 0 0 20px rgba(255,107,107,0.2); }
    50% { box-shadow: 0 0 40px rgba(255,107,107,0.5); }
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

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

/* ===== Header & Navigation ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(15, 15, 26, 0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-glass);
    transition: var(--transition);
}

header:hover {
    background: rgba(15, 15, 26, 0.95);
}

nav {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.nav-logo a {
    display: flex;
    align-items: center;
}

.nav-logo svg {
    width: 160px;
    height: auto;
    filter: drop-shadow(0 0 10px rgba(255,107,107,0.3));
    transition: var(--transition);
}

.nav-logo svg:hover {
    filter: drop-shadow(0 0 20px rgba(255,107,107,0.6));
    transform: scale(1.02);
}

.nav-menu ul {
    display: flex;
    gap: 8px;
}

.nav-menu ul li a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 30px;
    transition: var(--transition);
    position: relative;
}

.nav-menu ul li a::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-menu ul li a:hover {
    color: var(--text-primary);
    background: var(--bg-glass);
}

.nav-menu ul li a:hover::after {
    width: 60%;
}

.nav-search form {
    display: flex;
    align-items: center;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: 30px;
    padding: 4px 4px 4px 16px;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.nav-search form:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 20px rgba(255,107,107,0.15);
}

.nav-search input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 0.9rem;
    width: 180px;
    padding: 6px 0;
}

.nav-search input::placeholder {
    color: var(--text-muted);
}

.nav-search button {
    background: var(--primary);
    border: none;
    color: #fff;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-search button:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.mobile-menu-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.8rem;
    cursor: pointer;
    padding: 4px;
    transition: var(--transition);
}

.mobile-menu-toggle:hover {
    color: var(--primary);
}

/* ===== Banner ===== */
#banner {
    margin-top: 68px;
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    background-size: 200% 200%;
    animation: gradientShift 12s ease infinite;
}

.banner-slider {
    position: relative;
    width: 100%;
    max-width: 1200px;
    padding: 60px 40px;
    text-align: center;
    z-index: 2;
}

.banner-slide {
    display: none;
    animation: fadeUp 0.8s ease forwards;
}

.banner-slide.active {
    display: block;
}

.banner-slide h1,
.banner-slide h2 {
    font-size: 3.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, #ff6b6b, #ffa94d, #ff6b6b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    line-height: 1.2;
    text-shadow: none;
    animation: fadeUp 0.8s ease forwards;
}

.banner-slide p {
    font-size: 1.3rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 30px;
    animation: fadeUp 1s ease 0.2s forwards;
    opacity: 0;
}

.banner-slide .btn {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    padding: 16px 48px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 1px;
    transition: var(--transition);
    animation: fadeUp 1s ease 0.4s forwards;
    opacity: 0;
    box-shadow: 0 8px 30px rgba(255,107,107,0.3);
    border: none;
    cursor: pointer;
}

.banner-slide .btn:hover {
    background: var(--primary-dark);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 12px 40px rgba(255,107,107,0.5);
}

.banner-dots {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 3;
}

.banner-dots::after {
    content: '';
    display: block;
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0.7;
    animation: pulseGlow 2s ease infinite;
}

/* ===== Sections Common ===== */
section {
    max-width: 1280px;
    margin: 0 auto;
    padding: 80px 20px;
    animation: fadeUp 0.8s ease;
}

section h2 {
    font-size: 2.6rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 50px;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
}

section h2::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), #ffa94d);
    border-radius: 4px;
    margin: 12px auto 0;
}

/* ===== About Section ===== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.about-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: var(--transition);
    animation: fadeUp 0.6s ease;
}

.about-card:nth-child(1) { animation-delay: 0.1s; }
.about-card:nth-child(2) { animation-delay: 0.2s; }
.about-card:nth-child(3) { animation-delay: 0.3s; }
.about-card:nth-child(4) { animation-delay: 0.4s; }

.about-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(255,107,107,0.1);
}

.about-card h3 {
    font-size: 1.4rem;
    color: var(--primary);
    margin-bottom: 16px;
}

.about-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* ===== Products Section ===== */
#products {
    background: linear-gradient(180deg, transparent, rgba(255,107,107,0.03), transparent);
    border-radius: var(--radius);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.product-item {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.product-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary), #ffa94d);
    border-radius: 0 4px 4px 0;
    opacity: 0;
    transition: var(--transition);
}

.product-item:hover {
    transform: translateY(-6px) scale(1.01);
    border-color: rgba(255,107,107,0.3);
    box-shadow: 0 16px 40px rgba(0,0,0,0.3);
}

.product-item:hover::before {
    opacity: 1;
}

.product-item h3 {
    font-size: 1.3rem;
    color: var(--primary);
    margin-bottom: 12px;
}

.product-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

.product-advantages {
    margin-top: 50px;
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 36px 32px;
}

.product-advantages h3 {
    font-size: 1.6rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.product-advantages ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
}

.product-advantages ul li {
    color: var(--text-secondary);
    padding: 8px 12px 8px 28px;
    position: relative;
    font-size: 0.95rem;
}

.product-advantages ul li::before {
    content: '✦';
    color: var(--primary);
    position: absolute;
    left: 0;
    top: 8px;
    font-size: 1.1rem;
}

.product-advantages ul li strong {
    color: var(--text-primary);
}

/* ===== Solutions Section ===== */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.solution-card {
    background: var(--bg-glass);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: var(--transition);
}

.solution-card:hover {
    transform: translateY(-8px);
    background: rgba(255,255,255,0.1);
    border-color: var(--primary);
}

.solution-card h3 {
    font-size: 1.3rem;
    color: var(--primary);
    margin-bottom: 14px;
}

.solution-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.8;
}

.industry-cases {
    margin-top: 50px;
}

.industry-cases h3 {
    font-size: 1.6rem;
    color: var(--primary);
    margin-bottom: 24px;
    text-align: center;
}

.case-item {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 24px 28px;
    margin-bottom: 16px;
    transition: var(--transition);
}

.case-item:hover {
    border-color: var(--primary);
    transform: translateX(4px);
}

.case-item h4 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.case-item p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== Testimonials ===== */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.testimonial-item {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: var(--transition);
    position: relative;
}

.testimonial-item::after {
    content: '"';
    position: absolute;
    top: 16px;
    right: 24px;
    font-size: 4rem;
    color: var(--primary);
    opacity: 0.2;
    font-family: serif;
    line-height: 1;
}

.testimonial-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
}

.testimonial-item blockquote p {
    color: var(--text-secondary);
    font-style: italic;
    line-height: 1.8;
    font-size: 0.95rem;
}

.testimonial-item blockquote footer {
    color: var(--primary);
    margin-top: 16px;
    font-style: normal;
    font-size: 0.85rem;
    font-weight: 500;
}

/* ===== Articles Section ===== */
.articles-list {
    display: grid;
    gap: 20px;
}

.articles-list article {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 28px 32px;
    transition: var(--transition);
    animation: fadeUp 0.6s ease;
}

.articles-list article:hover {
    border-color: rgba(255,107,107,0.3);
    transform: translateX(6px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

.articles-list article h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.articles-list article h3 a {
    color: var(--text-primary);
    transition: var(--transition);
}

.articles-list article h3 a:hover {
    color: var(--primary);
}

.articles-list article time {
    color: var(--text-muted);
    font-size: 0.8rem;
    display: block;
    margin-bottom: 10px;
}

.articles-list article p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

.articles-list article > a {
    display: inline-block;
    margin-top: 12px;
    color: var(--primary);
    font-weight: 500;
    font-size: 0.9rem;
}

.articles-list article > a:hover {
    color: #ff9a9a;
    transform: translateX(4px);
}

/* ===== FAQ ===== */
.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: rgba(255,107,107,0.2);
}

.faq-item h3 {
    font-size: 1.05rem;
    color: var(--text-primary);
    padding: 18px 24px;
    cursor: pointer;
    position: relative;
    transition: var(--transition);
    font-weight: 600;
}

.faq-item h3::after {
    content: '+';
    position: absolute;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.4rem;
    color: var(--primary);
    transition: var(--transition);
}

.faq-item h3:hover {
    color: var(--primary);
}

.faq-item.active h3::after {
    transform: translateY(-50%) rotate(45deg);
}

.faq-answer {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.8;
    display: none;
    animation: fadeUp 0.4s ease;
}

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

/* ===== HowTo ===== */
.howto-content {
    background: var(--bg-card);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 40px 36px;
}

.howto-content h3 {
    font-size: 1.3rem;
    color: var(--primary);
    margin: 28px 0 12px;
}

.howto-content h3:first-child {
    margin-top: 0;
}

.howto-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 12px;
}

.howto-content ul,
.howto-content ol {
    padding-left: 24px;
    margin-bottom: 16px;
}

.howto-content ul li,
.howto-content ol li {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.8;
    margin-bottom: 6px;
    position: relative;
}

.howto-content ul li::marker {
    color: var(--primary);
}

.howto-content ol li::marker {
    color: var(--primary);
    font-weight: 600;
}

/* ===== Contact ===== */
.contact-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-detail {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 36px 32px;
}

.contact-detail h3 {
    font-size: 1.4rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.contact-detail p {
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.contact-detail p strong {
    color: var(--text-primary);
}

.contact-form {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius);
    padding: 36px 32px;
}

.contact-form h3 {
    font-size: 1.4rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.contact-form label {
    display: block;
    color: var(--text-secondary);
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 16px;
    margin-bottom: 18px;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: var(--font-base);
    transition: var(--transition);
    outline: none;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 20px rgba(255,107,107,0.1);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form button {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 1px;
}

.contact-form button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255,107,107,0.3);
}

/* ===== Footer ===== */
footer {
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border-glass);
    padding: 60px 20px 24px;
    margin-top: 40px;
}

.footer-content {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
}

.footer-section h3 {
    font-size: 1.1rem;
    color: var(--primary);
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 8px;
}

.footer-section h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--primary);
}

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section ul li a {
    color: var(--text-secondary);
    font-size: 0.85rem;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--primary);
    padding-left: 4px;
}

.footer-section p {
    color: var(--text-secondary);
    font-size: 0.82rem;
    margin-bottom: 6px;
    line-height: 1.6;
}

.footer-section p strong {
    color: var(--text-primary);
}

.footer-bottom {
    max-width: 1280px;
    margin: 40px auto 0;
    padding-top: 20px;
    border-top: 1px solid var(--border-glass);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .banner-slide h1,
    .banner-slide h2 {
        font-size: 2.4rem;
    }

    section h2 {
        font-size: 2rem;
        white-space: normal;
    }

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

@media (max-width: 768px) {
    nav {
        height: 60px;
        padding: 0 16px;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        background: rgba(15, 15, 26, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border-glass);
        padding: 16px 20px;
        flex-direction: column;
    }

    .nav-menu.open {
        display: flex;
    }

    .nav-menu ul {
        flex-direction: column;
        gap: 4px;
    }

    .nav-menu ul li a {
        padding: 12px 16px;
        font-size: 1rem;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .nav-search {
        flex: 1;
        margin: 0 12px;
    }

    .nav-search input {
        width: 100%;
    }

    #banner {
        min-height: 60vh;
    }

    .banner-slide {
        padding: 40px 20px;
    }

    .banner-slide h1,
    .banner-slide h2 {
        font-size: 1.8rem;
    }

    .banner-slide p {
        font-size: 1rem;
    }

    .banner-slide .btn {
        padding: 14px 32px;
        font-size: 1rem;
    }

    section {
        padding: 50px 16px;
    }

    section h2 {
        font-size: 1.6rem;
        margin-bottom: 30px;
    }

    .about-grid,
    .products-grid,
    .solutions-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

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

    .articles-list article {
        padding: 20px;
    }

    .howto-content {
        padding: 24px 20px;
    }

    .contact-detail,
    .contact-form {
        padding: 24px 20px;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
}

@media (max-width: 480px) {
    .nav-logo svg {
        width: 120px;
    }

    .banner-slide h1,
    .banner-slide h2 {
        font-size: 1.4rem;
    }

    .banner-slide p {
        font-size: 0.85rem;
    }

    section h2 {
        font-size: 1.3rem;
    }

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

/* ===== Utility ===== */
.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;
}

/* ===== Dark Mode Native ===== */
@media (prefers-color-scheme: light) {
    :root {
        --bg-dark: #f5f5fa;
        --bg-card: rgba(0,0,0,0.04);
        --bg-glass: rgba(255,255,255,0.7);
        --text-primary: #1a1a2e;
        --text-secondary: #4a4a5a;
        --text-muted: #8a8a9a;
        --border-glass: rgba(0,0,0,0.08);
        --shadow: 0 8px 32px rgba(0,0,0,0.1);
    }

    header {
        background: rgba(245, 245, 250, 0.85);
    }

    .nav-menu ul li a {
        color: #4a4a5a;
    }

    .nav-search input {
        color: #1a1a2e;
    }

    .nav-search input::placeholder {
        color: #8a8a9a;
    }

    .faq-item h3 {
        color: #1a1a2e;
    }

    .contact-form input,
    .contact-form textarea {
        color: #1a1a2e;
        background: rgba(0,0,0,0.03);
    }
}