/* ===== Design tokens and base ===== */
:root {
    --blue: #2864ef;
    --ink: #172a48;
    --muted: #64738a;
    --line: #e4ebf5;
    --pale: #f4f8ff;
    --radius: 20px;
}
* {
    box-sizing: border-box;
   
}
html {
    scroll-behavior: smooth;
    scroll-padding-top: 95px;
   
}
body {
    margin: 0;
    color: var(--ink);
    background: #fff;
    font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
    font-size: 15px;
    line-height: 1.8;
   
}
a {
    color: inherit;
    text-decoration: none;
   
}
button, input {
    font: inherit;
   
}
button, a, input {
    -webkit-tap-highlight-color: transparent;
   
}
button {
    cursor: pointer;
   
}
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible {
    outline: 3px solid #7ba6ff;
    outline-offset: 4px;
   
}
p {
    color: var(--muted);
   
}
h1, h2, h3 {
    line-height: 1.4;
    letter-spacing: -.035em;
   
}
h2 {
    font-size: clamp(27px, 3vw, 38px);
    margin: 12px 0;
   
}
h3 {
    font-size: 19px;
   
}
.wrap {
    width: min(1180px, calc(100% - 64px));
    margin-inline: auto;
   
}
.skip-link {
    position: absolute;
    left: 20px;
    top: -100px;
    z-index: 10;
    background: white;
    padding: 12px;
   
}
.skip-link:focus {
    top: 10px;
   
}
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 28px;
    padding: 14px 25px;
    background: var(--blue);
    color: white;
    border: 1px solid var(--blue);
    border-radius: 9px;
    font-weight: 600;
    line-height: 1.6;
    box-shadow: 0 7px 18px #2864ef18;
    transition: transform .2s, background .2s;
   
}
.button:hover {
    background: #174fce;
    transform: translateY(-2px);
   
}
.button.small {
    padding: 9px 17px;
    font-size: 13px;
   
}
.button.secondary {
    background: white;
    color: var(--ink);
    border-color: #dfe7f3;
    box-shadow: none;
   
}
.text-link {
    color: var(--blue);
    font-weight: 600;
    font-size: 14px;
   
}
.eyebrow {
    color: var(--blue);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .07em;
   
}
/* ===== Shared navigation ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: #ffffffee;
    border-bottom: 1px solid #edf1f8;
    backdrop-filter: blur(16px);
   
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 82px;
   
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 23px;
    font-weight: 800;
    white-space: nowrap;
   
}
.brand-icon {
    display: grid;
    place-items: center;
    width: 35px;
    height: 35px;
    background: var(--blue);
    border-radius: 11px;
    color: white;
    font-size: 21px;
   
}
.brand-sub {
    font-size: 11px;
    font-weight: 400;
    color: #7b8aa0;
    border-left: 1px solid var(--line);
    padding-left: 12px;
    margin-left: 5px;
   
}
nav {
    display: flex;
    align-items: center;
    gap: 27px;
    font-size: 14px;
   
}
nav a:hover, nav [aria-current] {
    color: var(--blue);
   
}
nav .button:hover {
    color: white;
   
}
.menu-toggle {
    display: none;
    border: 1px solid var(--line);
    background: white;
    border-radius: 6px;
   
}
/* ===== Homepage hero ===== */
.hero {
    text-align: center;
    padding-top: 65px;
    position: relative;
   
}
.hero::before {
    content: "";
    position: absolute;
    inset: 20px -30px 0;
    z-index: -1;
    background: radial-gradient(ellipse at 50% 48%, #e7f0ff, #ffffff00 70%);
   
}
.hero-pill {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    border: 1px solid #d9e6ff;
    background: #f5f9ff;
    padding: 5px 15px;
    border-radius: 50px;
    font-size: 12px;
    color: #496690;
   
}
.pulse-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--blue);
    box-shadow: 0 0 0 4px #2864ef0c;
   
}
.hero h1 {
    font-size: clamp(36px, 4.8vw, 62px);
    line-height: 1.3;
    letter-spacing: -.05em;
    margin: 24px 0 19px;
    font-weight: 800;
   
}
.hero h1 span {
    color: var(--blue);
   
}
.hero > p {
    font-size: 16px;
    line-height: 1.95;
   
}
.hero-actions {
    display: flex;
    justify-content: center;
    gap: 14px;
    margin-top: 27px;
   
}
.platform-line {
    color: #8793a6;
    font-size: 11px;
    margin-top: 20px;
   
}
.platform-line i {
    padding: 0 14px;
    font-style: normal;
   
}
/* ===== Interactive product illustration ===== */
.demo-stage {
    margin: 55px auto 0;
    max-width: 1030px;
    position: relative;
    text-align: left;
   
}
.app-window {
    border: 1px solid #d8e3f5;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 28px 65px #2c5eaa1c, 0 0 0 8px #ffffffa0;
    background: white;
   
}
.window-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 11px 20px;
    background: #f5f8fd;
    border-bottom: 1px solid var(--line);
    font-size: 10px;
    color: #8491a5;
   
}
.dots {
    letter-spacing: 3px;
    color: #afbed3;
   
}
.workspace {
    display: grid;
    grid-template-columns: 150px 285px 1fr;
    min-height: 350px;
   
}
.demo-sidebar {
    background: #f5f8fe;
    padding: 25px 13px;
   
}
.demo-sidebar b {
    display: block;
    font-size: 12px;
    margin: 0 10px 18px;
   
}
.demo-sidebar button {
    display: block;
    width: 100%;
    text-align: left;
    border: 0;
    border-radius: 6px;
    padding: 10px;
    font-size: 11px;
    color: #78869c;
    background: transparent;
    margin: 6px 0;
   
}
.demo-sidebar button.active {
    color: var(--blue);
    background: #e5edff;
    font-weight: 600;
   
}
.sidebar-note {
    font-size: 10px;
    color: #97a6ba;
    margin: 55px 10px 0;
   
}
.phrases {
    padding: 24px 18px;
    border-right: 1px solid var(--line);
   
}
.phrases label {
    display: block;
    font-size: 10px;
    color: #71829b;
   
}
.phrases input {
    border: 1px solid var(--line);
    padding: 8px 10px;
    width: 100%;
    border-radius: 6px;
    font-size: 10px;
    margin: 8px 0 13px;
   
}
.phrase {
    text-align: left;
    width: 100%;
    display: block;
    border: 1px solid var(--line);
    border-radius: 7px;
    padding: 10px 12px;
    margin-bottom: 9px;
    background: white;
    transition: .2s;
   
}
.phrase b {
    font-size: 11px;
    display: block;
   
}
.phrase span {
    display: block;
    font-size: 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: #8895a8;
    margin-top: 3px;
   
}
.phrase:hover, .phrase.selected {
    border-color: #9bbaff;
    background: #f2f7ff;
   
}
.phrases small {
    font-size: 9px;
    color: #96a2b4;
   
}
.chat {
    display: flex;
    flex-direction: column;
    min-width: 0;
   
}
.chat-title {
    display: flex;
    gap: 9px;
    align-items: center;
    padding: 14px 20px;
    border-bottom: 1px solid #f0f3f9;
   
}
.avatar {
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    background: #e9f0ff;
    color: #6292eb;
    border-radius: 9px;
    font-size: 12px;
   
}
.chat-title b {
    display: block;
    font-size: 10px;
   
}
.chat-title small {
    display: block;
    font-size: 8px;
    color: #92a0b4;
   
}
.online {
    margin-left: auto;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #62cda0;
   
}
.chat-messages {
    flex: 1;
    padding: 15px 20px;
    background: #fcfdff;
   
}
.chat-time {
    display: block;
    text-align: center;
    color: #a0adbf;
    font-size: 9px;
    margin-bottom: 18px;
   
}
.bubble {
    font-size: 11px;
    line-height: 1.8;
    padding: 10px 13px;
    max-width: 85%;
    border-radius: 10px;
   
}
.customer {
    background: #eef2f8;
    border-top-left-radius: 2px;
   
}
.reply {
    background: #e7efff;
    margin: 16px 0 0 auto;
    border-top-right-radius: 2px;
    color: #3963a7;
   
}
.reply.animate {
    animation: message-in .45s ease both;
   
}
.composer {
    padding: 12px 18px;
    border-top: 1px solid var(--line);
    text-align: right;
   
}
.composer p {
    text-align: left;
    font-size: 10px;
    margin: 0 0 9px;
    min-height: 27px;
   
}
.composer .button {
    font-size: 9px;
    padding: 5px 10px;
   
}
.floating-note {
    position: absolute;
    top: -19px;
    right: -19px;
    background: white;
    border: 1px solid #edf2fa;
    padding: 10px 18px;
    font-size: 11px;
    border-radius: 10px;
    box-shadow: 0 10px 25px #1a4b9b12;
    z-index: 1;
    animation: float 4s ease-in-out infinite;
   
}
.floating-note span {
    color: #28ad82;
    margin-right: 8px;
   
}
.demo-caption {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 10px;
    color: #8796ad;
    margin-top: 19px;
   
}
.demo-caption button {
    border: 0;
    padding: 4px 8px;
    background: #f1f5fc;
    color: #607796;
    border-radius: 4px;
    font-size: 10px;
   
}
.compat {
    display: flex;
    justify-content: center;
    gap: 32px;
    align-items: center;
    padding: 41px 0;
    border-bottom: 1px solid var(--line);
    flex-wrap: wrap;
   
}
.compat span, .compat small {
    color: #9aa7b9;
    font-size: 11px;
   
}
.compat b {
    color: #74839b;
    font-size: 16px;
   
}
/* ===== Content sections ===== */
.section {
    padding-top: 85px;
    padding-bottom: 10px;
   
}
.section-heading {
    margin-bottom: 35px;
    text-align: center;
   
}
.section-heading p {
    margin: 12px 0;
    font-size: 14px;
   
}
.grid {
    display: grid;
    gap: 20px;
   
}
.four {
    grid-template-columns: repeat(4, 1fr);
   
}
.three {
    grid-template-columns: repeat(3, 1fr);
   
}
.feature {
    padding: 27px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #fff;
   
}
.feature-number {
    display: inline-block;
    color: var(--blue);
    font-size: 12px;
    background: #edf3ff;
    padding: 4px 12px;
    border-radius: 7px;
   
}
.feature p {
    font-size: 13px;
    line-height: 1.95;
   
}
.workflow {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    background: var(--pale);
    border-radius: var(--radius);
    padding: 55px 65px;
   
}
.workflow h3 {
    font-size: 27px;
   
}
.workflow span {
    color: var(--blue);
    font-size: 12px;
   
}
.workflow p {
    font-size: 14px;
   
}
.workflow-visual {
    display: grid;
    gap: 14px;
    transform: rotate(-3deg);
   
}
.workflow-visual div {
    background: white;
    border: 1px solid #e2eafa;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 8px 15px #29437b06;
    font-weight: 600;
   
}
.workflow-visual div:nth-child(2) {
    margin-left: 20px;
    color: var(--blue);
   
}
.workflow-visual b {
    display: block;
    font-weight: 400;
    font-size: 12px;
    color: #98a5b9;
   
}
.device {
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 29px;
    transition: border-color .2s, transform .2s;
   
}
.device:hover {
    border-color: #a6c2ff;
    transform: translateY(-4px);
   
}
.device-icon {
    display: block;
    font-size: 38px;
    color: var(--blue);
    line-height: 1.2;
   
}
.device h3 {
    margin-bottom: 6px;
   
}
.device p {
    font-size: 12px;
    margin-top: 5px;
   
}
.device .text-link {
    font-size: 12px;
   
}
.article-card {
    border: 1px solid var(--line);
    border-radius: 14px;
    overflow: hidden;
    transition: transform .2s;
   
}
.article-card:hover {
    transform: translateY(-4px);
   
}
.article-art {
    position: relative;
    background: #eaf1ff;
    padding: 24px;
    height: 145px;
    overflow: hidden;
   
}
.article-card:nth-child(2) .article-art {
    background: #edf5fd;
   
}
.article-card:nth-child(3) .article-art {
    background: #eff2ff;
   
}
.article-art span {
    color: #6485bb;
    font-size: 12px;
   
}
.article-art b {
    position: absolute;
    right: 28px;
    top: -17px;
    font-size: 130px;
    color: #b6cefa;
    font-weight: 400;
   
}
.card-body {
    padding: 24px;
   
}
.card-body small {
    color: #91a0b6;
    font-size: 10px;
   
}
.card-body h3 {
    font-size: 18px;
    margin-top: 10px;
   
}
.card-body p {
    font-size: 13px;
   
}
.faq-list {
    max-width: 840px;
    margin: auto;
   
}
details {
    border-bottom: 1px solid var(--line);
   
}
summary {
    padding: 21px 34px 21px 0;
    cursor: pointer;
    list-style: none;
    position: relative;
    font-weight: 600;
   
}
summary::-webkit-details-marker {
    display: none;
   
}
summary::after {
    content: "+";
    position: absolute;
    right: 4px;
    color: var(--blue);
    font-size: 21px;
    top: 15px;
   
}
details[open] summary::after {
    content: "−";
   
}
details p {
    margin: 0 30px 23px 0;
    font-size: 14px;
   
}
.cta {
    padding: 45px 50px;
    background: #eef4ff;
    border: 1px solid #e1ebff;
    border-radius: 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 90px;
    margin-bottom: 80px;
   
}
.cta h2 {
    font-size: 30px;
   
}
.cta p {
    font-size: 13px;
    margin-bottom: 0;
   
}
/* ===== Inner pages and footer ===== */
.page-intro {
    padding-top: 38px;
    padding-bottom: 15px;
   
}
.breadcrumb {
    font-size: 11px;
    color: #92a1b7;
    margin-bottom: 38px;
   
}
.page-intro h1 {
    font-size: clamp(32px, 4vw, 48px);
    max-width: 850px;
    margin-top: 16px;
   
}
.page-intro > p {
    max-width: 700px;
   
}
.page-intro + .section {
    padding-top: 45px;
   
}
.feature-detail {
    display: grid;
    grid-template-columns: 1fr 2fr;
    align-items: center;
    padding: 40px 70px;
    border-radius: 20px;
    background: var(--pale);
    gap: 30px;
   
}
.feature-detail > span {
    font-size: 100px;
    color: #bfd4ff;
    font-weight: 700;
   
}
.download-panel {
    text-align: center;
    padding: 55px;
    margin-top: 25px;
    background: var(--pale);
    border: 1px solid var(--line);
    border-radius: 18px;
   
}
.download-panel small {
    display: block;
    color: #8494ab;
    margin-top: 20px;
   
}
.steps {
    padding-left: 24px;
    max-width: 800px;
    margin: 0 auto 30px;
   
}
.steps li {
    padding: 8px 0 20px 14px;
   
}
.article-content {
    max-width: 820px;
   
}
.article-content h2 {
    font-size: 26px;
    margin-top: 45px;
   
}
.article-content p {
    font-size: 16px;
    line-height: 2.1;
   
}
.article-meta {
    font-size: 12px !important;
    border-bottom: 1px solid var(--line);
    padding-bottom: 20px;
   
}
.article-content a {
    color: var(--blue);
   
}
.source-note {
    background: var(--pale);
    padding: 20px;
    margin-top: 35px;
    font-size: 13px;
   
}
.site-footer {
    background: #fafcff;
    border-top: 1px solid var(--line);
    margin-top: 80px;
    padding: 48px 0 0;
   
}
.footer-grid {
    display: grid;
    grid-template-columns: 2.3fr 1fr 1fr 1fr;
    gap: 30px;
   
}
.footer-grid p {
    font-size: 13px;
   
}
.footer-grid small {
    color: #98a5b7;
    font-size: 10px;
   
}
.footer-grid > div > b {
    font-size: 13px;
    display: block;
    margin: 5px 0 17px;
   
}
.footer-grid > div > a:not(.brand) {
    display: block;
    color: #7c8a9e;
    font-size: 12px;
    margin: 9px 0;
   
}
.footer-bottom {
    border-top: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
    padding: 22px 0;
    margin-top: 40px;
    color: #95a2b5;
    font-size: 10px;
   
}
@keyframes float { 50% {
    transform: translateY(-7px);
   
} }
@keyframes message-in { from {
    opacity: 0;
    transform: translateY(8px);
   
} to {
    opacity: 1;
    transform: translateY(0);
   
} }
/* ===== Tablet and mobile ===== */
@media (max-width: 1000px) {
    .brand-sub {
    display: none;
   
}
    nav {
    gap: 18px;
   
}
    .workspace {
    grid-template-columns: 120px 240px 1fr;
   
}
    .four {
    grid-template-columns: repeat(2, 1fr);
   
}
    .floating-note {
    right: 10px;
   
}
    .workflow {
    padding: 35px;
    gap: 35px;
   
}
}
@media (max-width: 720px) {
    .wrap {
    width: calc(100% - 36px);
   
}
    .header-inner {
    min-height: 68px;
   
}
    .menu-toggle {
    display: block;
    font-size: 20px;
    padding: 3px 10px;
   
}
    nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: white;
    border-bottom: 1px solid var(--line);
    padding: 20px;
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
   
}
    nav.open {
    display: flex;
   
}
    .hero {
    padding-top: 42px;
   
}
    .hero h1 {
    font-size: 38px;
   
}
    .hero > p {
    font-size: 13px;
   
}
    .hero-actions {
    gap: 9px;
   
}
    .hero-actions .button {
    font-size: 12px;
    padding: 12px 15px;
    gap: 8px;
   
}
    .platform-line {
    font-size: 9px;
   
}
    .platform-line i {
    padding: 0 4px;
   
}
    .demo-stage {
    margin-top: 44px;
   
}
    .workspace {
    grid-template-columns: 1fr 1.2fr;
   
}
    .demo-sidebar {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 8px;
   
}
    .demo-sidebar b, .sidebar-note {
    display: none;
   
}
    .demo-sidebar button {
    text-align: center;
    margin: 0;
    padding: 6px;
   
}
    .window-top {
    padding: 9px;
    font-size: 8px;
   
}
    .floating-note {
    font-size: 9px;
    padding: 6px 12px;
    top: -19px;
   
}
    .phrases {
    padding: 15px 9px;
   
}
    .chat-title {
    padding: 10px;
   
}
    .chat-messages {
    padding: 14px 10px;
   
}
    .bubble {
    max-width: 100%;
    font-size: 10px;
    padding: 9px;
   
}
    .composer {
    padding: 9px;
   
}
    .phrase {
    padding: 9px 7px;
   
}
    .compat {
    gap: 17px;
    padding: 27px 0;
   
}
    .compat span, .compat small {
    flex-basis: 100%;
    text-align: center;
   
}
    .three {
    grid-template-columns: 1fr;
   
}
    .four {
    gap: 12px;
   
}
    .feature, .device {
    padding: 20px;
   
}
    .section {
    padding-top: 55px;
   
}
    .workflow {
    grid-template-columns: 1fr;
    padding: 28px;
   
}
    .workflow-visual {
    margin: 5px;
   
}
    .cta {
    flex-direction: column;
    align-items: flex-start;
    padding: 27px;
    gap: 20px;
    margin-top: 55px;
    margin-bottom: 45px;
   
}
    .cta h2 {
    font-size: 27px;
   
}
    .footer-grid {
    grid-template-columns: 1fr 1fr;
   
}
    .footer-grid > div:first-child {
    grid-column: 1 / -1;
   
}
    .feature-detail {
    grid-template-columns: 1fr;
    padding: 25px;
    gap: 0;
   
}
    .feature-detail > span {
    font-size: 60px;
   
}
    .download-panel {
    padding: 30px 20px;
   
}
    .page-intro h1 {
    font-size: 34px;
   
}
    .footer-bottom {
    gap: 20px;
   
}
}
@media (prefers-reduced-motion: reduce) {
    html {
    scroll-behavior: auto;
   
}
    *, *::before, *::after {
    animation: none !important;
    transition: none !important;
   
}
}