:root {
    color-scheme: light;
    --blue: #2563eb;
    --blue-dark: #1d4ed8;
    --ink: #112548;
    --muted: #5d6c84;
    --line: #e5ebf4;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    color: var(--ink);
    background: #fff;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    -webkit-font-smoothing: antialiased;
    line-height: 1.5;
}

button { font: inherit; }
img { display: block; max-width: 100%; height: auto; }
.page-width { width: min(1160px, calc(100% - 64px)); margin-inline: auto; }

.head_menu {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 96px;
    border-bottom: 1px solid var(--line);
    gap: 20px;
}
.head_logo { width: 160px; }

.login, .login1 {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: background .18s ease, box-shadow .18s ease, transform .18s ease;
}
.login {
    min-height: 44px;
    padding: 10px 22px;
    border: 1px solid #d3e1fb;
    color: var(--blue);
    background: #f3f7ff;
    font-size: 14px;
    white-space: nowrap;
}
.login1 {
    min-height: 56px;
    padding: 16px 28px;
    gap: 32px;
    border: 1px solid var(--blue);
    background: var(--blue);
    color: #fff;
    font-size: 17px;
    box-shadow: 0 6px 16px #2563eb20, inset 0 1px 0 #ffffff20;
}
.login1 span { font-size: 22px; line-height: 1; transition: transform .18s ease; }
button:focus-visible { outline: 3px solid #1d4ed8; outline-offset: 4px; }
@media (hover: hover) {
    .login:hover { background: #e8f0ff; }
    .login1:hover { background: var(--blue-dark); box-shadow: 0 10px 24px #2563eb33; transform: translateY(-2px); }
    .login1:hover span { transform: translate(2px, -2px); }
}
button:active { transform: translateY(1px); }

.default_page {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: 56px;
}
.default_page_left { min-width: 0; }
.hero { padding-block: 72px 68px; gap: 32px; }
.title1_gongxi {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    margin: 0 0 24px;
    border: 1px solid #dbe7ff;
    border-radius: 100px;
    padding: 8px 14px;
    background: #f0f6ff;
    color: #2453a7;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.6;
}
.title1_gongxi::before {
    content: "";
    width: 6px;
    height: 6px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--blue);
}
.title2 {
    margin: 0;
    font-size: clamp(28px, 3.15vw, 43px);
    font-weight: 750;
    line-height: 1.4;
    letter-spacing: -.035em;
}
.title2 span { color: var(--blue); }
.title3 { margin: 20px 0 0; font-size: 16px; line-height: 1.95; color: var(--muted); }
.hero .title3 { margin-block: 22px 30px; }
.hero-art {
    position: relative;
    isolation: isolate;
    align-self: stretch;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 20px 8px 0;
    border-bottom: 1px solid #dce7fa;
}
.hero-art::before {
    content: "";
    position: absolute;
    z-index: -1;
    inset: 12% 0 0;
    border-radius: 180px 180px 24px 24px;
    background: linear-gradient(145deg, #f5f9ff 15%, #e5eeff 75%, #dbe9ff);
}
.hero-art img { width: 100%; max-width: 500px; }

.footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px 24px;
    padding-block: 28px;
    border-top: 1px solid var(--line);
}
.footer_title { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; overflow-wrap: anywhere; }
.footer_title:first-child { color: #344767; font-weight: 600; }

@media (max-width: 1000px) {
    .default_page { gap: 32px; }
    .hero { padding-block: 56px; }
}

@media (max-width: 760px) {
    .page-width { width: calc(100% - 40px); }
    .head_menu { min-height: 80px; }
    .head_logo { width: 144px; }
    .hero { grid-template-columns: minmax(0, 1fr); gap: 28px; padding-block: 44px 36px; }
    .hero .default_page_left { max-width: 560px; }
    .title2 { font-size: clamp(28px, 5.8vw, 40px); }
    .title1_gongxi { margin-bottom: 20px; }
    .hero .title3 { margin-block: 18px 24px; }
    .hero-art { width: min(100%, 460px); justify-self: center; padding-top: 0; }
    .hero-art img { width: 100%; min-width: 0; max-width: 420px; height: auto; }
    .footer { flex-direction: column; align-items: flex-start; gap: 6px; padding-block: 24px; }
}

@media (max-width: 400px) {
    .page-width { width: calc(100% - 32px); }
    .head_logo { width: 132px; }
    .login { padding-inline: 16px; }
    .hero { padding-top: 32px; }
    .title1_gongxi { font-size: 12px; padding-inline: 11px; }
    .title2 { font-size: 28px; }
    .title3 { font-size: 15px; }
    .login1 { width: 100%; justify-content: space-between; }
}

@media (prefers-reduced-motion: reduce) {
    .login, .login1, .login1 span { transition: none; }
    .login:hover, .login1:hover, .login1:hover span, button:active { transform: none; }
}

@media (prefers-reduced-motion: no-preference) {
    html { scroll-behavior: smooth; }
}

/* The lower page follows one visual system: devices, network, care, steps. */
a { color: var(--blue); text-underline-offset: 4px; }
a:focus-visible { outline: 3px solid #1d4ed8; outline-offset: 5px; border-radius: 3px; }
.eyebrow { margin: 0 0 14px; font-size: 12px; font-weight: 650; line-height: 1.7; letter-spacing: .12em; color: var(--blue); }
h2 { margin: 0; font-size: clamp(25px, 2.6vw, 34px); line-height: 1.5; font-weight: 650; letter-spacing: -.035em; }
h3 { margin: 0; font-size: 19px; line-height: 1.5; font-weight: 650; }
.section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 32px; }
.section-description { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.9; }
.clients { padding: 44px 0 56px; border-top: 1px solid var(--line); }
.device-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin: 0; padding: 0; list-style: none; }
.device { position: relative; padding: 26px; border: 1px solid var(--line); border-radius: 16px; background: linear-gradient(155deg, #fff, #f6f9ff); box-shadow: 0 4px 16px #11254804; }
.device-icon { display: flex; align-items: center; justify-content: center; width: 48px; height: 48px; margin-bottom: 25px; color: #315d9d; background: #eaf0fc; border-radius: 13px; }
.device-icon svg { width: 30px; height: 30px; }
.device h3 { font-size: 20px; letter-spacing: -.02em; }
.device p { margin: 6px 0 0; font-size: 12px; color: var(--muted); line-height: 1.8; }
.device-tag { position: absolute; top: 28px; right: 22px; color: #5d6c84; font-size: 12px; }
.client-note { display: flex; align-items: center; gap: 8px; margin: 20px 0 0; color: var(--muted); font-size: 12px; line-height: 1.8; flex-wrap: wrap; }
.client-note > span { color: #94a6c2; font-size: 18px; }
.client-note a { display: inline-flex; align-items: center; gap: 4px; min-height: 44px; font-weight: 600; text-decoration: none; }
.client-note a:hover { text-decoration: underline; }

.network-panel { display: grid; grid-template-columns: .95fr 1.05fr; align-items: center; min-height: 420px; overflow: hidden; border-radius: 24px; background: linear-gradient(115deg, #102449, #173661); color: #fff; }
.network-copy { position: relative; z-index: 1; padding: 50px 0 50px 48px; }
.network-copy .eyebrow { color: #9bc3ff; }
.network-copy h2 { font-size: clamp(30px, 3.2vw, 43px); line-height: 1.45; }
.network-copy > p:not(.eyebrow) { max-width: 390px; margin: 22px 0 26px; color: #b3c3dd; font-size: 14px; line-height: 1.95; }
.network-benefits { display: flex; flex-wrap: wrap; gap: 10px 16px; padding: 0; margin: 0; list-style: none; }
.network-benefits li { color: #d4e2f8; font-size: 12px; line-height: 1.8; }
.network-benefits li::before { content: "✓"; color: #83c4ff; margin-right: 6px; }
.network-visual { position: relative; min-width: 0; }
.globe { display: block; width: 100%; }
.route-label { position: absolute; display: flex; align-items: center; gap: 8px; padding: 10px 15px; border: 1px solid #ffffff24; border-radius: 8px; background: #203960; box-shadow: 0 8px 28px #081b3433; font-size: 12px; }
.route-label i { width: 6px; height: 6px; border-radius: 50%; background: #8fdfff; }
.route-label-start { left: 7%; top: 64%; }
.route-label-end { right: 9%; top: 23%; }
.visual-caption { position: absolute; bottom: 4%; left: 0; right: 0; text-align: center; color: #a9bddb; font-size: 11px; letter-spacing: .08em; }

.care-section { display: grid; grid-template-columns: .9fr 1fr 1fr; gap: 48px; padding: 64px 0; }
.care-intro { padding-top: 8px; }
.care-intro h2 { font-size: 31px; }
.care-item { padding-left: 32px; border-left: 1px solid var(--line); }
.care-icon { display: block; width: 48px; height: 48px; padding: 9px; border-radius: 13px; margin-bottom: 20px; color: var(--blue); background: #f0f5ff; }
.care-icon svg { width: 100%; height: 100%; }
.care-item p { margin: 12px 0 18px; font-size: 14px; line-height: 1.9; color: var(--muted); }
.care-caption { font-size: 12px; color: #58749a; letter-spacing: .04em; }

.getting-started { border-top: 1px solid var(--line); padding: 56px 0 64px; scroll-margin-top: 28px; }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 36px; list-style: none; margin: 40px 0 0; padding: 0; }
.steps li { display: flex; gap: 20px; align-items: flex-start; }
.step-number { font-size: 36px; font-weight: 500; line-height: 1.1; letter-spacing: -.04em; color: #5a7fb7; font-variant-numeric: tabular-nums; }
.steps h3 { font-size: 17px; }
.steps p { margin: 9px 0 0; max-width: 240px; font-size: 13px; line-height: 1.9; color: var(--muted); }

.closing-cta { position: relative; isolation: isolate; overflow: hidden; display: flex; justify-content: space-between; align-items: center; gap: 32px; padding: 44px 48px; margin-bottom: 48px; border-radius: 20px; background: #2563eb; color: #fff; }
.closing-cta::after { content: ""; z-index: -1; position: absolute; width: 470px; height: 470px; border: 70px solid #ffffff06; box-shadow: 0 0 0 55px #ffffff05, 0 0 0 110px #ffffff04; border-radius: 50%; right: -110px; top: -100px; }
.closing-cta .eyebrow { color: #d8e6ff; margin-bottom: 10px; }
.closing-cta h2 { font-size: clamp(24px, 2.3vw, 30px); }
.closing-cta p:not(.eyebrow) { margin: 12px 0 0; color: #d8e6ff; font-size: 13px; line-height: 1.9; }
.closing-cta .login1 { flex-shrink: 0; color: #2052be; background: #fff; border-color: #fff; box-shadow: 0 8px 20px #113c9d25; font-size: 15px; gap: 24px; }
.closing-cta .login1:hover { background: #edf3ff; }
.closing-cta .login1:focus-visible { outline-color: #fff; }
.footer { padding-bottom: 36px; }
.footer-brand img { width: 116px; margin-bottom: 10px; }
.footer-brand .footer_title { font-size: 12px; }

@media (max-width: 1000px) {
    .section-heading { align-items: flex-start; flex-direction: column; gap: 14px; }
    .section-description br { display: none; }
    .device { padding: 22px 18px; }
    .device-tag { right: 15px; top: 24px; }
    .network-copy { padding: 36px 0 36px 32px; }
    .network-panel { min-height: 390px; }
    .network-benefits { gap: 8px 12px; }
    .care-section { gap: 28px; }
    .care-item { padding-left: 24px; }
    .care-item h3 { font-size: 17px; }
    .care-intro h2 { font-size: 27px; }
    .steps { gap: 24px; }
    .steps li { gap: 14px; }
    .closing-cta { padding: 36px 32px; }
}

@media (max-width: 760px) {
    .clients { padding-block: 36px 40px; }
    .section-heading { margin-bottom: 24px; }
    .eyebrow { margin-bottom: 10px; font-size: 11px; }
    .device-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
    .device { padding: 20px; }
    .device-tag { right: 18px; top: 23px; }
    .device-icon { width: 42px; height: 42px; margin-bottom: 20px; }
    .device-icon svg { width: 27px; height: 27px; }
    .device h3 { font-size: 18px; }
    .network-panel { grid-template-columns: minmax(0, 1fr); border-radius: 18px; }
    .network-copy { padding: 30px 28px 0; }
    .network-copy h2 { font-size: 34px; }
    .network-copy > p:not(.eyebrow) { margin-block: 18px 20px; }
    .network-visual { width: min(100%, 480px); justify-self: center; padding-bottom: 10px; }
    .visual-caption { bottom: 7%; font-size: 10px; }
    .route-label { padding: 8px 10px; font-size: 12px; }
    .route-label-start { top: 60%; }
    .care-section { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 24px; padding-block: 40px; }
    .care-intro { grid-column: 1 / -1; padding: 0; }
    .care-intro h2 { font-size: 25px; }
    .care-intro h2 br { display: none; }
    .care-item { padding: 0; border: 0; }
    .care-item p { font-size: 13px; }
    .care-icon { margin-bottom: 16px; }
    .getting-started { padding-block: 36px 40px; }
    .steps { grid-template-columns: minmax(0, 1fr); margin-top: 28px; gap: 24px; }
    .steps li { gap: 22px; }
    .step-number { min-width: 46px; }
    .steps p { max-width: none; margin-top: 6px; }
    .closing-cta { flex-direction: column; align-items: flex-start; gap: 26px; padding: 30px 26px; margin-bottom: 32px; border-radius: 18px; }
    .closing-cta .login1 { min-height: 52px; width: 100%; justify-content: space-between; }
    .footer { gap: 20px; padding-bottom: 88px; }
}

@media (max-width: 360px) {
    .device { padding: 16px 14px; }
    .device-tag { right: 13px; top: 18px; font-size: 11px; }
    .device-icon { width: 36px; height: 36px; }
    .device p { font-size: 12px; }
    .network-copy { padding-inline: 22px; }
    .network-copy h2 { font-size: 30px; }
    .care-section { grid-template-columns: minmax(0, 1fr); }
    .care-item { border-top: 1px solid var(--line); padding-top: 24px; }
    .client-note { gap: 4px; }
}

/* Give tablet-sized screens room without changing the desktop or phone layout. */
@media (min-width: 761px) and (max-width: 900px) {
    .device-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .device { padding: 24px; }
    .device-tag { top: 27px; right: 24px; }
    .care-section { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 32px; }
    .care-intro { grid-column: 1 / -1; }
    .care-intro h2 br { display: none; }
    .care-item { padding-left: 0; border-left: 0; }
}