* {
    box-sizing: border-box;
}

:root {
    --red: #f02f2b;
    --red-dark: #b81f1b;
    --orange: #ff7a30;
    --blue: #2869d8;
    --green: #168a5a;
    --ink: #151927;
    --text: #2b3345;
    --muted: #667085;
    --soft: #f6f8fc;
    --soft-red: #fff3f2;
    --line: #e7ebf3;
    --white: #ffffff;
    --shadow: 0 18px 45px rgba(31, 43, 73, 0.1);
    --max: 1160px;
}

html {
    scroll-behavior: smooth;
    scrollbar-color: rgba(240, 47, 43, 0.82) #f3f5f9;
    scrollbar-width: thin;
}

body {
    margin: 0;
    color: var(--text);
    background: var(--white);
    font-family: "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.72;
    overflow-x: hidden;
}

body.modal-open {
    overflow: hidden;
}

body::-webkit-scrollbar {
    width: 12px;
}

body::-webkit-scrollbar-track {
    background: #f3f5f9;
}

body::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--red), var(--orange));
    border: 3px solid #f3f5f9;
    border-radius: 999px;
}

a {
    color: inherit;
}

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

.skip-link {
    position: absolute;
    left: 18px;
    top: -60px;
    z-index: 200;
    padding: 10px 14px;
    border-radius: 8px;
    background: var(--red);
    color: var(--white);
    font-weight: 800;
    text-decoration: none;
}

.skip-link:focus {
    top: 16px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
    padding: 14px 5%;
    border-bottom: 1px solid rgba(231, 235, 243, 0.86);
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(16px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--ink);
    font-size: 1.06rem;
    font-weight: 900;
    line-height: 1.2;
    text-decoration: none;
    white-space: nowrap;
}

.brand img {
    width: 44px;
    height: 44px;
    object-fit: contain;
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 18px;
}

.site-nav a {
    color: #3d4659;
    font-size: 0.95rem;
    font-weight: 700;
    text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
    color: var(--red);
}

.nav-contact {
    min-height: 42px;
    padding: 9px 18px;
    border: 0;
    border-radius: 8px;
    color: var(--white);
    background: linear-gradient(135deg, var(--red), var(--orange));
    box-shadow: 0 12px 26px rgba(240, 47, 43, 0.2);
    font: inherit;
    font-weight: 900;
    cursor: pointer;
}

.hero {
    position: relative;
    --hero-bg-x: 1;
    --hero-bg-y: 0.5;
    min-height: clamp(650px, 52vw, 880px);
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--line);
    background:
        linear-gradient(90deg, rgba(255, 255, 255, 0.88) 0%, rgba(255, 255, 255, 0.76) 34%, rgba(255, 255, 255, 0.22) 63%, rgba(255, 255, 255, 0.03) 100%),
        url("honglu-ai-agent-hardware-hero.png?v=20260601-industrial-agri") center right / cover no-repeat,
        #ffffff;
}

.hero-inner,
.section-inner {
    width: min(var(--max), calc(100% - 40px));
    margin: 0 auto;
}

.hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 680px) minmax(300px, 1fr);
    gap: 28px;
    align-items: end;
}

@media (min-width: 1600px) {
    .hero-inner {
        width: min(1480px, calc(100% - 96px));
    }
}

.hero-copy {
    position: relative;
    z-index: 4;
    max-width: 680px;
    padding: 82px 0 92px;
}

h1,
h2,
h3 {
    margin: 0;
    color: var(--ink);
    line-height: 1.18;
    letter-spacing: 0;
}

h1 {
    font-size: clamp(2.5rem, 4.75vw, 4.45rem);
    font-weight: 950;
}

h1 span {
    display: block;
}

.hero-summary {
    max-width: 660px;
    margin: 24px 0 0;
    color: #465266;
    font-size: clamp(1.05rem, 1.8vw, 1.24rem);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 34px;
    padding-left: 28px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 11px 20px;
    border: 1px solid #ffd4d1;
    border-radius: 8px;
    color: var(--red-dark);
    background: var(--white);
    font: inherit;
    font-weight: 900;
    line-height: 1.2;
    text-decoration: none;
    cursor: pointer;
}

.button-primary {
    border-color: transparent;
    color: var(--white);
    background: linear-gradient(135deg, var(--red), var(--orange));
    box-shadow: 0 16px 34px rgba(240, 47, 43, 0.26);
}

.hero-actions .button-primary {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    min-width: 206px;
    min-height: 58px;
    padding-inline: 32px;
    border-color: rgba(240, 47, 43, 0.34);
    color: var(--red-dark);
    background: rgba(255, 255, 255, 0.9);
    font-size: 1.12rem;
    box-shadow: 0 14px 30px rgba(31, 43, 73, 0.1);
    backdrop-filter: blur(10px);
    transition:
        border-color 1s ease,
        color 1s ease,
        box-shadow 1s ease;
}

.hero-actions .button-primary::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: linear-gradient(135deg, var(--red), var(--orange));
    opacity: 0;
    transition: opacity 1s ease;
}

.hero-actions .button-primary:hover,
.hero-actions .button-primary:focus-visible {
    border-color: rgba(240, 47, 43, 0.62);
    color: var(--white);
    box-shadow: 0 16px 34px rgba(240, 47, 43, 0.22);
}

.hero-actions .button-primary:hover::before,
.hero-actions .button-primary:focus-visible::before {
    opacity: 1;
}

.button-ghost {
    color: #333d52;
    border-color: var(--line);
}

.hero-visual-labels {
    position: absolute;
    inset: 0;
    z-index: 3;
    pointer-events: none;
}

.hero-flow {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 2;
    width: min(66%, 980px);
    pointer-events: none;
}

.flow-lines {
    position: absolute;
    inset: 6% 0 4% auto;
    width: 100%;
    height: 90%;
    overflow: visible;
}

.flow-path {
    fill: none;
    stroke-linecap: round;
    stroke-width: 2.2;
    stroke-dasharray: 10 12;
    filter: drop-shadow(0 0 8px rgba(240, 47, 43, 0.24));
    animation: flowDash 5.8s linear infinite;
}

.path-system,
.path-reminder {
    stroke: rgba(240, 47, 43, 0.72);
}

.path-hardware,
.path-record {
    stroke: rgba(31, 190, 181, 0.76);
}

.moving-light {
    filter: drop-shadow(0 0 12px currentColor);
}

.light-red {
    fill: var(--red);
    color: var(--red);
}

.light-blue {
    fill: #19c2b6;
    color: #19c2b6;
}

.flow-node {
    position: absolute;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 112px;
    min-height: 34px;
    padding: 7px 12px;
    border: 1px solid rgba(240, 47, 43, 0.2);
    border-radius: 8px;
    color: #1c2638;
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 12px 28px rgba(31, 43, 73, 0.12);
    backdrop-filter: blur(12px);
    font-size: 0.86rem;
    font-weight: 950;
    line-height: 1.25;
    text-align: center;
    white-space: nowrap;
}

.ai-node {
    top: 42%;
    left: 47%;
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.36);
    background: rgba(20, 31, 51, 0.88);
    box-shadow:
        0 0 0 1px rgba(240, 47, 43, 0.16),
        0 0 24px rgba(25, 194, 182, 0.2),
        0 16px 32px rgba(20, 31, 51, 0.2);
}

.system-node {
    top: 21%;
    left: 11%;
}

.hardware-node {
    top: 76%;
    left: 11%;
}

.reminder-node {
    top: 74%;
    left: 78%;
}

.record-node {
    top: 84%;
    left: 55%;
}

.flow-dot {
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--red);
    box-shadow: 0 0 0 8px rgba(240, 47, 43, 0.14), 0 0 20px rgba(240, 47, 43, 0.35);
    animation: pulsePoint 2.4s ease-in-out infinite;
}

.dot-one { top: 40%; left: 46%; }
.dot-two { top: 22%; left: 62%; animation-delay: .35s; }
.dot-three { top: 74%; left: 40%; animation-delay: .7s; }
.dot-four { top: 82%; left: 76%; animation-delay: 1.05s; }

.visual-label {
    position: absolute;
    display: inline-flex;
    align-items: center;
    max-width: 168px;
    padding: 7px 10px;
    border: 1px solid rgba(240, 47, 43, 0.18);
    border-radius: 8px;
    color: #263144;
    background: rgba(255, 255, 255, 0.88);
    box-shadow: 0 10px 24px rgba(31, 43, 73, 0.12);
    backdrop-filter: blur(12px);
    font-size: 0.86rem;
    font-weight: 900;
    line-height: 1.25;
    white-space: nowrap;
    opacity: 0;
    transform: translate(var(--label-shift-x, 12px), var(--label-shift-y, -16px));
    transition: opacity 160ms ease;
}

.visual-label[hidden] {
    display: none;
}

.visual-label::before {
    content: "";
    display: none;
}

.visual-label::after {
    content: "";
    display: none;
}

.hero-visual-labels.is-positioned .visual-label.is-visible {
    opacity: 1;
}

.hardware-marker {
    position: absolute;
    width: 12px;
    height: 12px;
    border: 2px solid rgba(255, 255, 255, 0.94);
    border-radius: 50%;
    background: var(--red);
    box-shadow: 0 0 0 8px rgba(240, 47, 43, 0.13), 0 0 18px rgba(240, 47, 43, 0.42);
    transform: translate(-50%, -50%);
}

.hardware-marker[hidden] {
    display: none;
}

.label-agent {
    top: 22%;
    left: 76%;
}

.label-agent::after {
    right: 92%;
    top: 50%;
}

.label-terminal {
    top: 56%;
    left: 62%;
}

.label-terminal::after {
    right: 92%;
    top: 50%;
}

.label-sensor {
    top: 84%;
    left: 62%;
}

.label-sensor::after {
    right: -26px;
    top: 50%;
}

.label-scanner {
    top: 70%;
    left: 50%;
}

.label-scanner::after {
    right: -26px;
    top: 50%;
}

.label-tracker {
    top: 86%;
    left: 74%;
}

.label-tracker::after {
    right: -26px;
    top: 50%;
}

.label-gateway {
    top: 64%;
    left: 78%;
}

.label-gateway::after {
    left: -26px;
    top: 50%;
}

.label-edge {
    top: 83%;
    left: 50%;
}

.label-edge::after {
    left: -26px;
    top: 50%;
}

.label-controller {
    top: 86%;
    left: 84%;
    --label-shift-y: 62px !important;
}

.label-controller::after {
    left: -26px;
    top: 50%;
}

.label-mobile {
    top: 78%;
    left: 91%;
}

.label-mobile::after {
    left: -26px;
    top: 50%;
}

.section {
    padding: 84px 0;
}

.section-soft {
    background: var(--soft);
}

.section-title {
    max-width: 820px;
    margin-bottom: 34px;
}

.center-title {
    margin-right: auto;
    margin-left: auto;
    text-align: center;
}

.section-title h2,
.intro-grid h2,
.compare-copy h2,
.why-grid h2,
.about-grid h2,
.contact-panel h2 {
    font-size: clamp(1.85rem, 3.4vw, 3rem);
    font-weight: 950;
}

.section-title p,
.intro-grid p,
.compare-copy p,
.why-grid p,
.about-grid p,
.contact-panel p {
    margin: 14px 0 0;
    color: var(--muted);
    font-size: 1.04rem;
}

.intro-section {
    padding-top: 70px;
}

.intro-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 36px;
    align-items: start;
}

.intro-list {
    display: grid;
    gap: 14px;
}

.intro-list article,
.why-list article {
    padding: 18px 20px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    box-shadow: 0 12px 30px rgba(31, 43, 73, 0.06);
}

.intro-list strong,
.why-list strong {
    display: block;
    margin-bottom: 5px;
    color: var(--ink);
    font-size: 1.08rem;
    font-weight: 950;
}

.intro-list span,
.why-list span {
    display: block;
    color: var(--muted);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.product-card {
    min-width: 0;
    padding: 30px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    box-shadow: var(--shadow);
}

.product-card h3 {
    margin-top: 14px;
    font-size: clamp(1.45rem, 2.4vw, 2rem);
    font-weight: 950;
}

.product-number {
    color: var(--red);
    font-size: 1.2rem;
    font-weight: 950;
}

.blue-card .product-number,
.blue-card a {
    color: var(--blue);
}

.green-card .product-number,
.green-card a {
    color: var(--green);
}

.red-card {
    background: linear-gradient(180deg, #fff7f6, #ffffff 52%);
}

.blue-card {
    background: linear-gradient(180deg, #f3f7ff, #ffffff 52%);
}

.green-card {
    background: linear-gradient(180deg, #f1fbf6, #ffffff 52%);
}

.product-lead {
    margin: 12px 0 16px;
    color: #3e485c;
    font-weight: 800;
}

.product-card ul,
.compare-panel ul,
.dev-card ul {
    margin: 0;
    padding-left: 20px;
    color: var(--muted);
}

.product-card li,
.compare-panel li,
.dev-card li {
    margin: 9px 0;
}

.product-card a {
    display: inline-flex;
    margin-top: 20px;
    color: var(--red-dark);
    font-weight: 950;
    text-decoration: none;
}

.compare-layout {
    display: grid;
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 34px;
    align-items: center;
}

.compare-panels {
    display: grid;
    gap: 16px;
}

.compare-panel {
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
}

.compare-panel h3,
.dev-card h3 {
    margin-bottom: 14px;
    font-size: 1.24rem;
    font-weight: 950;
}

.muted-panel {
    background: #fafbfe;
}

.strong-panel {
    border-color: #ffc5c1;
    background: var(--soft-red);
}

.development-compare {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    gap: 22px;
    align-items: stretch;
}

.dev-card {
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
}

.dev-card-red {
    border-color: #ffc5c1;
    background: linear-gradient(180deg, #fff5f4, #ffffff);
}

.vs-mark {
    align-self: center;
    color: var(--red);
    font-size: clamp(2rem, 4vw, 3.6rem);
    font-weight: 950;
}

.scenario-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.scenario-grid article {
    min-width: 0;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    box-shadow: 0 12px 30px rgba(31, 43, 73, 0.06);
}

.scenario-grid img {
    width: 38px;
    height: 38px;
    object-fit: contain;
}

.scenario-grid h3 {
    margin-top: 16px;
    font-size: 1.18rem;
    font-weight: 950;
}

.scenario-grid p {
    margin: 10px 0 0;
    color: var(--muted);
}

.section-red {
    color: var(--white);
    background:
        linear-gradient(135deg, rgba(20, 24, 35, 0.92), rgba(184, 31, 27, 0.92)),
        #151927;
}

.section-red h2,
.section-red p,
.section-red strong,
.section-red span {
    color: var(--white);
}

.why-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 38px;
    align-items: start;
}

.why-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.why-list article {
    border-color: rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.09);
    box-shadow: none;
}

.why-list span {
    color: rgba(255, 255, 255, 0.82);
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.steps article {
    padding: 26px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    box-shadow: 0 12px 30px rgba(31, 43, 73, 0.06);
}

.steps span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    margin-bottom: 18px;
    border-radius: 999px;
    color: var(--white);
    background: var(--red);
    font-weight: 950;
}

.steps h3 {
    font-size: 1.2rem;
    font-weight: 950;
}

.steps p {
    margin: 10px 0 0;
    color: var(--muted);
}

.about-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 330px;
    gap: 34px;
    align-items: center;
}

.brand-panel {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    display: grid;
    align-content: center;
    align-items: center;
    justify-items: center;
    min-height: 330px;
    padding: 36px 26px 32px;
    border: 1px solid rgba(240, 47, 43, 0.24);
    border-radius: 8px;
    background:
        radial-gradient(circle at 50% 31%, rgba(255, 255, 255, 0.98) 0%, rgba(255, 250, 249, 0.92) 36%, rgba(255, 238, 235, 0.76) 57%, rgba(255, 255, 255, 0.98) 86%),
        linear-gradient(180deg, #fff8f7 0%, #ffffff 100%);
    text-align: center;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.9),
        0 18px 45px rgba(31, 43, 73, 0.09);
}

.brand-panel::before {
    content: "";
    position: absolute;
    top: 26px;
    left: 50%;
    z-index: 0;
    width: 176px;
    height: 176px;
    border-radius: 999px;
    background:
        radial-gradient(circle, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.9) 36%, rgba(240, 47, 43, 0.28) 58%, rgba(255, 122, 48, 0.16) 72%, rgba(255, 255, 255, 0) 82%);
    box-shadow:
        0 0 30px rgba(240, 47, 43, 0.18),
        0 0 64px rgba(255, 122, 48, 0.12);
    opacity: 0.86;
    transform: translateX(-50%);
    pointer-events: none;
}

.brand-panel img {
    position: relative;
    z-index: 1;
    width: 118px;
    height: 118px;
    object-fit: contain;
    filter: drop-shadow(0 0 10px rgba(240, 47, 43, 0.12));
}

.brand-panel strong {
    position: relative;
    z-index: 1;
    margin-top: 18px;
    color: var(--ink);
    font-size: 1.5rem;
    font-weight: 950;
}

.brand-panel span {
    position: relative;
    z-index: 1;
    display: block;
    margin-top: 6px;
    color: #596577;
    font-size: 0.9rem;
    font-weight: 800;
    line-height: 1.36;
    white-space: nowrap;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

details {
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
}

summary {
    color: var(--ink);
    font-size: 1.08rem;
    font-weight: 950;
    cursor: pointer;
}

details p {
    margin: 12px 0 0;
    color: var(--muted);
}

.contact-band {
    padding: 56px 0 76px;
}

.contact-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    padding: 34px;
    border: 1px solid #ffc7c3;
    border-radius: 8px;
    background: linear-gradient(135deg, #fff7f6, #ffffff 58%);
    box-shadow: var(--shadow);
}

.contact-panel p {
    max-width: 760px;
}

.site-footer {
    padding: 44px 5% 24px;
    color: #d8dce6;
    background: #11141d;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.35fr 0.8fr 0.9fr;
    gap: 30px;
    width: min(var(--max), 100%);
    margin: 0 auto;
}

.footer-brand {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 14px;
}

.footer-brand img {
    width: 44px;
    height: 44px;
}

.site-footer h2,
.site-footer h3 {
    color: var(--white);
}

.site-footer h2 {
    font-size: 1.08rem;
}

.site-footer h3 {
    margin-bottom: 10px;
    font-size: 1rem;
}

.site-footer p,
.site-footer a {
    color: #c3cad8;
    text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
    color: var(--white);
}

.copyright {
    width: min(var(--max), 100%);
    margin: 28px auto 0;
    padding-top: 18px;
    border-top: 1px solid rgba(255, 255, 255, 0.11);
    color: #99a2b5;
    font-size: 0.92rem;
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(0, 0, 0, 0.72);
}

.modal.is-open {
    display: flex;
}

.qr-modal-content {
    position: relative;
    width: min(720px, calc(100vw - 40px));
    max-height: calc(100vh - 40px);
    padding: clamp(28px, 4vw, 46px);
    overflow: hidden;
    border: 1px solid rgba(240, 47, 43, 0.6);
    border-radius: 8px;
    color: var(--white);
    background: #020202;
    text-align: center;
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
}

.modal-close {
    position: absolute;
    top: 18px;
    right: 22px;
    border: 0;
    color: var(--red);
    background: transparent;
    font-size: 2.4rem;
    line-height: 1;
    cursor: pointer;
}

.modal-title {
    color: var(--red);
    font-size: clamp(2.1rem, 4.4vw, 3.5rem);
    font-weight: 950;
}

.modal-subtitle {
    margin: 18px 0 22px;
    color: #ddd4d4;
    font-size: clamp(1.05rem, 2vw, 1.35rem);
    font-weight: 800;
}

.qr-image-container {
    width: min(340px, 68vw);
    margin: 0 auto;
    padding: 12px;
    border-radius: 8px;
    background: var(--white);
}

.qr-image-container img {
    display: block;
    width: 100%;
}

.qr-help,
.qr-email,
.qr-time {
    margin: 18px 0 0;
    color: #ddd4d4;
    font-size: 1.02rem;
    font-weight: 800;
}

.qr-email {
    margin-top: 8px;
}

.qr-email a {
    color: var(--red);
    text-decoration: none;
}

.qr-email a:hover,
.qr-email a:focus-visible {
    color: var(--orange);
}

.qr-time {
    margin-top: 8px;
}

@media (max-width: 1120px) {
    .site-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .site-nav {
        justify-content: flex-start;
        gap: 12px 16px;
    }

    .hero {
        --hero-bg-x: 0.5;
        --hero-bg-y: 1;
        min-height: 780px;
        align-items: flex-start;
        background:
            linear-gradient(180deg, rgba(255, 255, 255, 0.94) 0%, rgba(255, 255, 255, 0.82) 52%, rgba(255, 255, 255, 0.28) 100%),
            url("honglu-ai-agent-hardware-hero.png?v=20260601-industrial-agri") center bottom / cover no-repeat,
            #ffffff;
    }

    .hero-copy {
        padding: 70px 0 26px;
    }

    .hero-inner {
        display: block;
    }

    .hero-visual-labels {
        inset: 0;
    }

    .hero-flow {
        top: 37%;
        width: 100%;
        height: 63%;
    }

    .flow-lines {
        inset: 2% 0 0;
        height: 98%;
        opacity: 0.9;
    }

    .flow-node,
    .visual-label {
        display: none;
    }

    .ai-node { top: 35%; left: 50%; }
    .system-node { top: 13%; left: 24%; }
    .hardware-node { top: 74%; left: 12%; }
    .reminder-node { top: 72%; left: 69%; }
    .record-node { top: 82%; left: 47%; }

    .label-agent { top: 47%; left: 55%; }
    .label-terminal { top: 68%; left: 48%; }
    .label-sensor { top: 86%; left: 53%; }
    .label-scanner { top: 78%; left: 20%; }
    .label-tracker { top: 86%; left: 72%; }
    .label-gateway {
        top: 72%;
        left: 68%;
        --label-shift-x: -86px !important;
    }
    .label-edge { top: 88%; left: 28%; }
    .label-controller { top: 88%; left: 76%; }
    .label-mobile { top: 80%; left: 74%; }

    .intro-grid,
    .compare-layout,
    .why-grid,
    .about-grid {
        grid-template-columns: 1fr;
    }

    .product-grid,
    .scenario-grid,
    .steps,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .development-compare {
        grid-template-columns: 1fr;
    }

    .vs-mark {
        justify-self: center;
    }

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

@media (max-width: 620px) {
    .brand {
        font-size: 0.98rem;
        white-space: normal;
    }

    .site-nav a,
    .nav-contact {
        font-size: 0.9rem;
    }

    .hero-inner,
    .section-inner {
        width: min(100% - 28px, var(--max));
    }

    .hero-copy {
        padding: 54px 0 24px;
    }

    .hero {
        min-height: 790px;
    }

    h1 {
        font-size: clamp(2rem, 10.2vw, 3rem);
    }

    .visual-label {
        max-width: 116px;
        padding: 6px 8px;
        font-size: 0.74rem;
        white-space: normal;
    }

    .hero-flow {
        display: none;
    }

    .flow-node {
        min-width: 82px;
        min-height: 30px;
        padding: 6px 8px;
        font-size: 0.7rem;
        white-space: normal;
    }

    .ai-node { top: 37%; left: 49%; }
    .system-node { top: 14%; left: 12%; }
    .hardware-node { top: 77%; left: 5%; }
    .reminder-node { top: 72%; left: 68%; }
    .record-node { top: 84%; left: 43%; }

    .visual-label::after {
        width: 20px;
    }

    .label-agent { top: 49%; left: 48%; }
    .label-terminal { top: 68%; left: 39%; }
    .label-sensor { top: 86%; left: 39%; }
    .label-scanner { top: 77%; left: 7%; }
    .label-tracker { top: 86%; left: 63%; }
    .label-gateway { top: 72%; left: 61%; }
    .label-edge { top: 88%; left: 18%; }
    .label-controller { top: 88%; left: 66%; }
    .label-mobile { top: 79%; left: 64%; }

    .section {
        padding: 64px 0;
    }

    .product-card,
    .dev-card,
    .contact-panel {
        padding: 24px;
    }

    .contact-panel {
        align-items: flex-start;
        flex-direction: column;
    }

    .why-list {
        grid-template-columns: 1fr;
    }

    .qr-modal-content {
        padding: 28px 20px;
    }
}

@media (prefers-reduced-motion: no-preference) {
    .brand-panel::before {
        animation: brandGlowBreath 4s ease-in-out infinite;
    }

    .product-card,
    .scenario-grid article,
    .steps article,
    .compare-panel {
        transition: transform 180ms ease, box-shadow 180ms ease;
    }

    .product-card:hover,
    .scenario-grid article:hover,
    .steps article:hover,
    .compare-panel:hover {
        transform: translateY(-3px);
        box-shadow: 0 18px 42px rgba(31, 43, 73, 0.1);
    }
}

@media (prefers-reduced-motion: reduce) {
    .brand-panel::before {
        animation: none;
    }

    .flow-path,
    .flow-dot {
        animation: none;
    }

    .moving-light {
        display: none;
    }
}

@keyframes brandGlowBreath {
    0%,
    100% {
        opacity: 0.72;
        transform: translateX(-50%) scale(0.94);
    }
    50% {
        opacity: 1;
        transform: translateX(-50%) scale(1.08);
    }
}

@keyframes flowDash {
    to {
        stroke-dashoffset: -88;
    }
}

@keyframes pulsePoint {
    0%,
    100% {
        transform: scale(0.8);
        opacity: 0.55;
    }
    50% {
        transform: scale(1.18);
        opacity: 1;
    }
}