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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, Helvetica, "Microsoft YaHei", "Noto Sans Myanmar", sans-serif;
    background: #050505;
    color: #ffffff;
    line-height: 1.6;
}

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

.site-nav {
    position: sticky;
    top: 0;
    z-index: 45;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 74px;
    padding: 12px 230px 12px 28px;
    background: rgba(5, 5, 5, 0.78);
    border-bottom: 1px solid rgba(245, 197, 66, 0.18);
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
    backdrop-filter: blur(16px);
}

.nav-brand {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    min-width: max-content;
    color: #f7d36b;
    font-weight: 800;
}

.nav-brand img {
    width: 42px;
    height: 42px;
    object-fit: cover;
    border-radius: 50%;
    box-shadow: 0 0 22px rgba(245, 197, 66, 0.24);
}

.nav-links {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 20px;
}

.nav-links a {
    position: relative;
    color: #e6ddc7;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0;
    transition: color 0.2s ease;
}

.nav-links a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -8px;
    height: 2px;
    background: linear-gradient(90deg, #f5c542, #b98321);
    opacity: 0;
    transform: scaleX(0.2);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.nav-links a:hover {
    color: #f5c542;
}

.nav-links a:hover::after {
    opacity: 1;
    transform: scaleX(1);
}

.nav-toggle {
    display: none;
    width: 42px;
    height: 42px;
    padding: 9px;
    background: rgba(245, 197, 66, 0.08);
    border: 1px solid rgba(245, 197, 66, 0.28);
    border-radius: 6px;
}

.nav-toggle span {
    display: block;
    height: 2px;
    margin: 5px 0;
    background: #f5c542;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.language-switcher {
    position: fixed;
    top: 17px;
    right: 18px;
    z-index: 55;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    color: #d8d0be;
    background: rgba(5, 5, 5, 0.86);
    border: 1px solid rgba(245, 197, 66, 0.32);
    border-radius: 999px;
    box-shadow: 0 16px 42px rgba(0, 0, 0, 0.38);
    backdrop-filter: blur(12px);
}

.lang-button {
    min-width: 42px;
    min-height: 32px;
    padding: 0 10px;
    color: #f2ead5;
    font: inherit;
    font-size: 13px;
    font-weight: 800;
    background: transparent;
    border: 0;
    border-radius: 999px;
    cursor: pointer;
    transition: color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.lang-button:hover,
.lang-button.active {
    color: #080808;
    background: linear-gradient(135deg, #f5c542, #b98321);
    transform: translateY(-1px);
}

.hero {
    text-align: center;
    padding: 86px 20px 96px;
    background:
        radial-gradient(circle at top, rgba(245, 197, 66, 0.18), transparent 32%),
        linear-gradient(135deg, #000000, #14110a 55%, #060606);
    border-bottom: 1px solid rgba(245, 197, 66, 0.25);
}

.hero-kicker {
    display: inline-flex;
    margin-bottom: 18px;
    padding: 8px 14px;
    color: #f5c542;
    font-size: 13px;
    font-weight: 800;
    background: rgba(245, 197, 66, 0.08);
    border: 1px solid rgba(245, 197, 66, 0.26);
    border-radius: 999px;
    box-shadow: 0 12px 34px rgba(0, 0, 0, 0.26);
}

.logo {
    width: 150px;
    max-width: 45vw;
    margin-bottom: 25px;
    filter: drop-shadow(0 12px 35px rgba(245, 197, 66, 0.25));
}

.hero h1 {
    font-size: 48px;
    line-height: 1.12;
    color: #f7d36b;
    margin-bottom: 20px;
    letter-spacing: 0;
}

.hero p {
    font-size: 20px;
    color: #e8e0ca;
    max-width: 700px;
    margin: auto;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
    margin-top: 32px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 24px;
    border-radius: 4px;
    font-weight: 700;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.button:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 38px rgba(245, 197, 66, 0.16);
}

.button.primary {
    background: linear-gradient(135deg, #f5c542, #b98321);
    color: #080808;
}

.button.secondary {
    border: 1px solid rgba(245, 197, 66, 0.55);
    color: #f5c542;
}

.products {
    padding: 70px 20px;
    background: #080808;
}

.products h2,
.section-heading h2,
.about-company h2,
.ai-promotion h2,
.contact h2 {
    text-align: center;
    color: #f5c542;
    font-size: 34px;
    line-height: 1.2;
    margin-bottom: 16px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    max-width: 1200px;
    margin: auto;
}

.card {
    background: linear-gradient(180deg, #171717, #0d0d0d);
    border: 1px solid rgba(245, 197, 66, 0.18);
    border-radius: 8px;
    padding: 18px;
    text-align: center;
    box-shadow: 0 18px 45px rgba(0, 0, 0, 0.28);
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(245, 197, 66, 0.48);
}

.card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-radius: 6px;
    margin-bottom: 15px;
}

.card h3 {
    color: #f5c542;
    margin-bottom: 10px;
}

.card p {
    color: #cccccc;
    line-height: 1.5;
}

.section-inner {
    width: min(1120px, calc(100% - 40px));
    margin: auto;
}

.section-dark {
    background: #050505;
    border-top: 1px solid rgba(245, 197, 66, 0.12);
    border-bottom: 1px solid rgba(245, 197, 66, 0.12);
}

.principle,
.knowledge-center,
.why-choose,
.business-solutions,
.about-company,
.solutions,
.ai-promotion,
.contact {
    padding: 76px 0;
}

.section-heading {
    max-width: 760px;
    margin: 0 auto 38px;
    text-align: center;
}

.section-heading span,
.eyebrow {
    display: block;
    color: #d3a736;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.section-heading p,
.ai-promotion p,
.contact p {
    color: #d8d0be;
}

.process-grid,
.solution-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.process-item,
.solution-card,
.knowledge-card,
.enterprise-card,
.business-card,
.ai-feature-list div,
.about-panel,
.contact-panel {
    background: linear-gradient(180deg, #151515, #0b0b0b);
    border: 1px solid rgba(245, 197, 66, 0.18);
    border-radius: 8px;
}

.process-item,
.solution-card,
.knowledge-card,
.enterprise-card,
.ai-feature-list div {
    padding: 24px;
}

.process-item strong {
    display: block;
    color: #f5c542;
    font-size: 28px;
    margin-bottom: 14px;
}

.process-item h3,
.solution-card h3,
.knowledge-card h3,
.enterprise-card h3,
.business-card h3,
.ai-feature-list h3 {
    color: #ffffff;
    font-size: 20px;
    margin-bottom: 10px;
}

.process-item p,
.solution-card p,
.knowledge-card p,
.enterprise-card p,
.business-card p,
.ai-feature-list p {
    color: #cfc7b5;
}

.section-reveal {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.section-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.why-choose {
    background:
        radial-gradient(circle at 70% 0%, rgba(245, 197, 66, 0.09), transparent 28%),
        #070707;
}

.enterprise-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.enterprise-card {
    min-height: 245px;
    background:
        linear-gradient(135deg, rgba(245, 197, 66, 0.1), rgba(255, 255, 255, 0.025)),
        rgba(17, 17, 17, 0.84);
    box-shadow: 0 20px 56px rgba(0, 0, 0, 0.32);
    backdrop-filter: blur(14px);
    transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}

.enterprise-card i {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    margin-bottom: 18px;
    color: #080808;
    font-size: 20px;
    background: linear-gradient(135deg, #f5c542, #b98321);
    border-radius: 50%;
}

.enterprise-card:hover,
.business-card:hover {
    transform: translateY(-7px);
    border-color: rgba(245, 197, 66, 0.52);
    box-shadow: 0 30px 74px rgba(0, 0, 0, 0.42);
}

.business-solutions {
    background:
        linear-gradient(180deg, rgba(245, 197, 66, 0.04), transparent 20%),
        #050505;
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 22px;
}

.business-card {
    overflow: hidden;
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    min-height: 250px;
    transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}

.business-card img {
    width: 100%;
    height: 100%;
    min-height: 250px;
    object-fit: cover;
    filter: saturate(0.9) contrast(1.08);
}

.business-card div {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 26px;
}

.knowledge-center {
    overflow: hidden;
    background:
        radial-gradient(circle at 18% 12%, rgba(245, 197, 66, 0.12), transparent 28%),
        linear-gradient(180deg, #080808, #030303);
    border-bottom: 1px solid rgba(245, 197, 66, 0.12);
}

.knowledge-diagram {
    display: grid;
    grid-template-columns: 1fr 42px 1fr 42px 1fr 42px 1fr;
    align-items: center;
    gap: 12px;
    margin-bottom: 30px;
    animation: fadeUp 0.8s ease both;
}

.diagram-node {
    min-height: 104px;
    padding: 20px;
    text-align: center;
    background: linear-gradient(180deg, rgba(245, 197, 66, 0.14), rgba(10, 10, 10, 0.96));
    border: 1px solid rgba(245, 197, 66, 0.34);
    border-radius: 8px;
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.34);
}

.diagram-node span {
    display: block;
    color: #f5c542;
    font-weight: 700;
    margin-bottom: 6px;
}

.diagram-node small {
    color: #e1d6bd;
}

.diagram-line {
    position: relative;
    height: 2px;
    background: linear-gradient(90deg, rgba(245, 197, 66, 0.15), #f5c542);
}

.diagram-line::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -2px;
    width: 9px;
    height: 9px;
    border-top: 2px solid #f5c542;
    border-right: 2px solid #f5c542;
    transform: translateY(-50%) rotate(45deg);
}

.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.knowledge-card {
    position: relative;
    overflow: hidden;
    min-height: 270px;
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.32);
    animation: fadeUp 0.8s ease both;
    transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
}

.knowledge-card:nth-child(2) {
    animation-delay: 0.08s;
}

.knowledge-card:nth-child(3) {
    animation-delay: 0.16s;
}

.knowledge-card:nth-child(4) {
    animation-delay: 0.24s;
}

.knowledge-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(245, 197, 66, 0.13), transparent 42%);
    opacity: 0;
    transition: opacity 0.24s ease;
    pointer-events: none;
}

.knowledge-card:hover {
    transform: translateY(-6px);
    border-color: rgba(245, 197, 66, 0.5);
    box-shadow: 0 28px 70px rgba(0, 0, 0, 0.42);
}

.knowledge-card:hover::before {
    opacity: 1;
}

.wide-card {
    grid-column: span 2;
}

.card-icon,
.mini-diagram,
.split-diagram,
.outage-diagram,
.formula,
.shield-diagram {
    margin-bottom: 18px;
}

.battery-icon {
    position: relative;
    width: 76px;
    height: 38px;
    border: 2px solid #f5c542;
    border-radius: 6px;
    box-shadow: inset 24px 0 0 rgba(245, 197, 66, 0.35);
}

.battery-icon::after {
    content: "";
    position: absolute;
    top: 11px;
    right: -8px;
    width: 6px;
    height: 14px;
    background: #f5c542;
    border-radius: 0 3px 3px 0;
}

.mini-diagram,
.split-diagram,
.outage-diagram,
.shield-diagram {
    display: flex;
    align-items: center;
    gap: 10px;
}

.mini-diagram span,
.split-diagram div,
.outage-diagram span,
.outage-diagram strong {
    padding: 10px 12px;
    color: #f5c542;
    font-weight: 700;
    background: rgba(245, 197, 66, 0.09);
    border: 1px solid rgba(245, 197, 66, 0.28);
    border-radius: 6px;
}

.mini-diagram i {
    flex: 1;
    height: 2px;
    min-width: 24px;
    background: linear-gradient(90deg, rgba(245, 197, 66, 0.2), #f5c542);
}

.split-diagram {
    align-items: stretch;
}

.split-diagram div {
    flex: 1;
    color: #ffffff;
}

.split-diagram small {
    color: #cfc7b5;
    font-weight: 400;
}

.outage-diagram strong {
    color: #080808;
    background: linear-gradient(135deg, #f5c542, #c99126);
}

.formula {
    display: inline-flex;
    padding: 14px 18px;
    color: #080808;
    font-size: 22px;
    font-weight: 800;
    background: linear-gradient(135deg, #f5c542, #b98321);
    border-radius: 6px;
}

.battery-type-grid,
.selection-grid {
    display: grid;
    gap: 14px;
}

.battery-type-grid {
    grid-template-columns: repeat(3, 1fr);
}

.battery-type-grid div,
.selection-grid div {
    padding: 16px;
    background: rgba(255, 255, 255, 0.035);
    border: 1px solid rgba(245, 197, 66, 0.14);
    border-radius: 6px;
}

.battery-type-grid strong,
.selection-grid strong {
    display: block;
    color: #f5c542;
    margin-bottom: 6px;
}

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

.selection-grid span {
    display: block;
    color: #cfc7b5;
}

.shield-diagram {
    justify-content: center;
    width: 78px;
    height: 88px;
    color: #f5c542;
    font-weight: 800;
    background:
        linear-gradient(135deg, rgba(245, 197, 66, 0.22), rgba(245, 197, 66, 0.03));
    border: 2px solid rgba(245, 197, 66, 0.55);
    border-radius: 42px 42px 36px 36px;
}

.solutions {
    background:
        linear-gradient(180deg, rgba(245, 197, 66, 0.05), transparent 22%),
        #090909;
}

.ai-layout {
    display: grid;
    grid-template-columns: 0.95fr 1.05fr;
    gap: 42px;
    align-items: center;
}

.ai-video-block {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 28px;
    align-items: center;
    padding: 28px;
    background:
        linear-gradient(135deg, rgba(245, 197, 66, 0.12), transparent 42%),
        linear-gradient(180deg, #151515, #080808);
    border: 1px solid rgba(245, 197, 66, 0.26);
    border-radius: 8px;
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.36);
    animation: fadeUp 0.8s ease both;
}

.video-copy h3 {
    color: #f5c542;
    font-size: 26px;
    line-height: 1.2;
    margin-bottom: 12px;
}

.video-copy p {
    max-width: 460px;
}

.video-frame {
    position: relative;
    overflow: hidden;
    background: #000000;
    border: 1px solid rgba(245, 197, 66, 0.36);
    border-radius: 8px;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.video-frame::before {
    content: "";
    display: block;
    aspect-ratio: 16 / 9;
}

.video-frame video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: #000000;
}

.ai-promotion h2,
.contact h2 {
    text-align: left;
}

.ai-feature-list {
    display: grid;
    gap: 16px;
}

.contact {
    background: #080808;
}

.about-company {
    background:
        radial-gradient(circle at 12% 15%, rgba(245, 197, 66, 0.1), transparent 28%),
        linear-gradient(180deg, #050505, #090909);
}

.about-panel {
    display: grid;
    grid-template-columns: 0.95fr 1.05fr;
    gap: 40px;
    align-items: center;
    padding: 38px;
    border-color: rgba(245, 197, 66, 0.3);
    box-shadow: 0 26px 76px rgba(0, 0, 0, 0.36);
}

.about-company h2 {
    text-align: left;
}

.about-company p {
    color: #d8d0be;
}

.about-points {
    display: grid;
    gap: 14px;
}

.about-points div {
    padding: 18px;
    background: rgba(255, 255, 255, 0.035);
    border: 1px solid rgba(245, 197, 66, 0.14);
    border-radius: 6px;
}

.about-points strong {
    display: block;
    color: #f5c542;
    margin-bottom: 6px;
}

.about-points span {
    color: #cfc7b5;
}

.contact-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 38px;
    align-items: start;
    padding: 36px;
    border-color: rgba(245, 197, 66, 0.32);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

.contact-info {
    display: grid;
    gap: 12px;
}

.contact-info p {
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(245, 197, 66, 0.12);
}

.contact-info p:last-child {
    border-bottom: 0;
    padding-bottom: 0;
}

.contact-info strong {
    color: #f5c542;
}

.contact-action-text {
    margin-top: 8px;
    padding: 18px;
    color: #f2ead5;
    background:
        linear-gradient(135deg, rgba(245, 197, 66, 0.13), rgba(255, 255, 255, 0.025)),
        #090909;
    border: 1px solid rgba(245, 197, 66, 0.22);
    border-radius: 8px;
}

.contact-buttons {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 4px;
}

.contact-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 52px;
    padding: 12px 16px;
    color: #080808;
    font-weight: 800;
    background: linear-gradient(135deg, #f5c542, #b98321);
    border: 1px solid rgba(245, 197, 66, 0.58);
    border-radius: 6px;
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.28);
    transition: transform 0.22s ease, box-shadow 0.22s ease, filter 0.22s ease;
}

.contact-button i {
    font-size: 18px;
}

.contact-button:hover {
    transform: translateY(-4px);
    filter: brightness(1.08);
    box-shadow: 0 24px 54px rgba(0, 0, 0, 0.4);
}

.social-heading {
    margin-top: 10px;
    color: #f5c542;
    font-weight: 800;
}

.social-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 10px;
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-height: 48px;
    padding: 11px 14px;
    color: #f2ead5;
    background:
        linear-gradient(135deg, rgba(245, 197, 66, 0.12), rgba(255, 255, 255, 0.02)),
        #0b0b0b;
    border: 1px solid rgba(245, 197, 66, 0.22);
    border-radius: 6px;
    transition: transform 0.22s ease, border-color 0.22s ease, color 0.22s ease, background 0.22s ease;
}

.social-link i {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    color: #080808;
    font-size: 14px;
    background: linear-gradient(135deg, #f5c542, #b98321);
    border-radius: 50%;
    flex: 0 0 auto;
}

.social-link span {
    font-weight: 700;
}

.social-link:hover {
    transform: translateY(-4px);
    color: #ffffff;
    border-color: rgba(245, 197, 66, 0.58);
    background:
        linear-gradient(135deg, rgba(245, 197, 66, 0.2), rgba(255, 255, 255, 0.03)),
        #101010;
}

.floating-support {
    position: fixed;
    right: 22px;
    bottom: 24px;
    z-index: 60;
    display: flex;
    flex-direction: column;
    gap: 13px;
    animation: supportFadeIn 0.75s ease both;
}

.support-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 58px;
    height: 58px;
    color: #ffffff;
    font-size: 26px;
    border-radius: 50%;
    box-shadow: 0 16px 34px rgba(0, 0, 0, 0.42), 0 0 0 1px rgba(245, 197, 66, 0.18);
    transition: transform 0.22s ease, box-shadow 0.22s ease, filter 0.22s ease;
    animation: supportBreath 3s ease-in-out infinite;
}

.support-button::before {
    content: attr(data-tooltip);
    position: absolute;
    right: calc(100% + 12px);
    top: 50%;
    width: max-content;
    max-width: 190px;
    padding: 8px 11px;
    color: #f5c542;
    font-size: 13px;
    font-weight: 800;
    line-height: 1.2;
    background: rgba(5, 5, 5, 0.94);
    border: 1px solid rgba(245, 197, 66, 0.3);
    border-radius: 6px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.36);
    opacity: 0;
    pointer-events: none;
    transform: translate(8px, -50%);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.support-button::after {
    content: "";
    position: absolute;
    right: calc(100% + 6px);
    top: 50%;
    width: 9px;
    height: 9px;
    background: rgba(5, 5, 5, 0.94);
    border-top: 1px solid rgba(245, 197, 66, 0.3);
    border-right: 1px solid rgba(245, 197, 66, 0.3);
    opacity: 0;
    pointer-events: none;
    transform: translate(8px, -50%) rotate(45deg);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.support-button:hover {
    transform: scale(1.09) translateY(-2px);
    filter: brightness(1.08);
    box-shadow: 0 22px 46px rgba(0, 0, 0, 0.5), 0 0 0 2px rgba(245, 197, 66, 0.28);
}

.support-button:hover::before,
.support-button:hover::after {
    opacity: 1;
    transform: translate(0, -50%) rotate(0);
}

.support-button:hover::after {
    transform: translate(0, -50%) rotate(45deg);
}

.support-button:active {
    transform: scale(0.96);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.42);
}

.support-messenger {
    background: linear-gradient(135deg, #00b2ff, #006aff);
}

.support-viber {
    background: linear-gradient(135deg, #8f5db7, #665cac);
}

.support-whatsapp {
    background: linear-gradient(135deg, #25d366, #128c7e);
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(18px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes supportFadeIn {
    from {
        opacity: 0;
        transform: translateY(18px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes supportBreath {
    0%,
    100% {
        box-shadow: 0 16px 34px rgba(0, 0, 0, 0.42), 0 0 0 1px rgba(245, 197, 66, 0.18);
    }

    50% {
        box-shadow: 0 18px 40px rgba(0, 0, 0, 0.48), 0 0 0 6px rgba(245, 197, 66, 0.06);
    }
}

@media (max-width: 900px) {
    .site-nav {
        padding: 10px 18px;
    }

    .nav-brand span {
        display: none;
    }

    .nav-toggle {
        display: block;
        margin-left: auto;
        margin-right: 158px;
    }

    .nav-links {
        position: absolute;
        top: calc(100% + 1px);
        left: 16px;
        right: 16px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 12px;
        background: rgba(5, 5, 5, 0.94);
        border: 1px solid rgba(245, 197, 66, 0.22);
        border-radius: 8px;
        box-shadow: 0 22px 52px rgba(0, 0, 0, 0.44);
        backdrop-filter: blur(16px);
    }

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

    .nav-links a {
        padding: 13px 12px;
    }

    .nav-links a::after {
        bottom: 6px;
        left: 12px;
        right: 12px;
    }

    .product-grid,
    .process-grid,
    .solution-grid,
    .enterprise-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .business-grid,
    .about-panel {
        grid-template-columns: 1fr;
    }

    .knowledge-diagram {
        grid-template-columns: 1fr;
    }

    .diagram-line {
        width: 2px;
        height: 28px;
        margin: auto;
        background: linear-gradient(180deg, rgba(245, 197, 66, 0.15), #f5c542);
    }

    .diagram-line::after {
        top: auto;
        right: 50%;
        bottom: -2px;
        transform: translateX(50%) rotate(135deg);
    }

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

    .wide-card {
        grid-column: span 2;
    }

    .hero h1 {
        font-size: 32px;
    }

    .ai-layout,
    .ai-video-block,
    .contact-panel {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .site-nav {
        min-height: 64px;
        padding: 9px 12px;
    }

    .nav-brand img {
        width: 38px;
        height: 38px;
    }

    .nav-toggle {
        margin-right: 0;
    }

    .hero {
        padding: 72px 18px 60px;
    }

    .language-switcher {
        top: 76px;
        right: 12px;
        left: 12px;
        justify-content: center;
        gap: 5px;
        padding: 7px;
    }

    .lang-button {
        min-width: 34px;
        padding: 0 8px;
        font-size: 12px;
    }

    .product-grid,
    .process-grid,
    .solution-grid,
    .enterprise-grid,
    .business-grid {
        grid-template-columns: 1fr;
    }

    .business-card {
        grid-template-columns: 1fr;
    }

    .business-card img {
        height: 220px;
        min-height: 220px;
    }

    .hero h1 {
        font-size: 28px;
    }

    .hero p {
        font-size: 16px;
    }

    .products h2,
    .section-heading h2,
    .ai-promotion h2,
    .contact h2 {
        font-size: 26px;
    }

    .principle,
    .knowledge-center,
    .why-choose,
    .business-solutions,
    .about-company,
    .solutions,
    .ai-promotion,
    .contact,
    .products {
        padding: 52px 0;
    }

    .section-inner {
        width: min(100% - 32px, 1120px);
    }

    .about-panel,
    .contact-panel {
        padding: 24px;
    }

    .contact-buttons,
    .social-links {
        grid-template-columns: 1fr;
    }

    .ai-video-block {
        padding: 20px;
    }

    .video-copy h3 {
        font-size: 22px;
    }

    .knowledge-grid,
    .battery-type-grid,
    .selection-grid {
        grid-template-columns: 1fr;
    }

    .wide-card {
        grid-column: span 1;
    }

    .knowledge-card {
        min-height: auto;
    }

    .mini-diagram,
    .split-diagram,
    .outage-diagram {
        align-items: stretch;
        flex-direction: column;
    }

    .mini-diagram i {
        width: 2px;
        min-width: 0;
        height: 18px;
        margin-left: 22px;
    }

    .button {
        width: 100%;
    }

    .floating-support {
        right: 14px;
        bottom: 14px;
        gap: 10px;
    }

    .support-button {
        width: 48px;
        height: 48px;
        font-size: 21px;
    }

    .support-button::before,
    .support-button::after {
        display: none;
    }
}