:root {
    --page-bg: #ffffff;
    --hero-bg: #eef6ff;
    --hero-bg-soft: #eaf3ff;
    --primary: #1769ff;
    --primary-dark: #0755ea;
    --text: #101828;
    --muted: #4b5870;
    --soft: #7a879b;
    --border: #dbe6f5;
    --panel: #ffffff;
    --line: #edf2f8;
    --shadow-lg: 0 24px 60px rgba(27, 94, 176, .18);
    --shadow-md: 0 14px 36px rgba(31, 82, 152, .12);
    --shadow-sm: 0 8px 22px rgba(39, 83, 137, .09);
    --radius: 14px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-width: 320px;
    overflow-x: hidden;
    color: var(--text);
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--page-bg);
}

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

button {
    font: inherit;
}

.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 20;
    height: 72px;
    background: rgba(255, 255, 255, .92);
    border-bottom: 1px solid #d8e3f0;
    backdrop-filter: blur(18px);
}

.header-inner {
    width: min(1410px, calc(100% - 96px));
    height: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.brand {
    display: flex;
    align-items: center;
    flex: 0 0 auto;
    min-width: 295px;
}

.brand-mark {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    margin-right: 10px;
    filter: drop-shadow(0 8px 13px rgba(23, 105, 255, .24));
}

.brand-mark svg {
    width: 38px;
    height: 38px;
    display: block;
}

.brand-name {
    color: #111827;
    font-size: 25px;
    font-weight: 800;
    letter-spacing: 0;
    line-height: 1;
}

.brand-sub {
    margin-left: 16px;
    padding-left: 16px;
    color: #101828;
    font-size: 14px;
    line-height: 1;
    border-left: 1px solid #d2d8e2;
}

.main-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 44px;
    flex: 1 1 auto;
    height: 100%;
}

.main-nav a {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: #101828;
    font-size: 15px;
    font-weight: 500;
    line-height: 1;
    white-space: nowrap;
}

.main-nav a.active,
.main-nav a:hover {
    color: var(--primary);
}

.main-nav svg {
    width: 14px;
    height: 14px;
}

.header-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 26px;
    flex: 0 0 auto;
}

.login-link {
    color: #111827;
    font-size: 15px;
    font-weight: 600;
}

.register-btn {
    min-width: 108px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    background: linear-gradient(180deg, #2477ff 0%, #135ff0 100%);
    border-radius: 8px;
    box-shadow: 0 12px 24px rgba(23, 105, 255, .24);
}

.hero {
    position: relative;
    min-height: 690px;
    padding-top: 72px;
    overflow: visible;
    background:
        radial-gradient(circle at 79% 7%, rgba(199, 224, 255, .95) 0, rgba(199, 224, 255, .25) 32%, transparent 54%),
        linear-gradient(151deg, #f8fcff 0%, #eef6ff 42%, #dceeff 100%);
}

.hero::before {
    content: "";
    position: absolute;
    left: -9%;
    bottom: -86px;
    width: 68%;
    height: 230px;
    border-radius: 50% 50% 0 0;
    background: rgba(255, 255, 255, .62);
    transform: rotate(5deg);
}

.hero::after {
    content: "";
    position: absolute;
    right: -110px;
    top: 72px;
    width: 520px;
    height: 360px;
    background: linear-gradient(135deg, rgba(255, 255, 255, .56), rgba(183, 214, 255, .2));
    clip-path: polygon(34% 0, 100% 0, 100% 54%, 36% 100%, 0 76%);
}

.hero-arc {
    position: absolute;
    pointer-events: none;
    border: 2px solid rgba(91, 142, 223, .12);
    border-radius: 50%;
}

.hero-arc-one {
    right: 12%;
    top: 98px;
    width: 510px;
    height: 158px;
    transform: rotate(-2deg);
}

.hero-arc-two {
    right: 18%;
    top: 128px;
    width: 690px;
    height: 230px;
    transform: rotate(-13deg);
}

.hero-inner {
    position: relative;
    z-index: 2;
    width: min(1356px, calc(100% - 120px));
    margin: 0 auto;
    min-height: 618px;
    display: grid;
    grid-template-columns: minmax(440px, 520px) minmax(660px, 1fr);
    align-items: center;
    gap: 34px;
}

.hero-copy {
    padding-top: 18px;
}

.hero-badge {
    width: fit-content;
    height: 36px;
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 0 17px;
    margin-bottom: 30px;
    color: #075eff;
    font-size: 16px;
    font-weight: 600;
    line-height: 1;
    background: rgba(211, 228, 255, .78);
    border-radius: 11px;
}

.hero-badge svg {
    width: 19px;
    height: 19px;
}

.hero h1 {
    margin: 0;
    color: #0b1324;
    font-size: 58px;
    font-weight: 800;
    line-height: 1.32;
    letter-spacing: 0;
}

.hero h1 span {
    color: var(--primary);
}

.hero-desc {
    max-width: 520px;
    margin: 22px 0 36px;
    color: #36445a;
    font-size: 18px;
    line-height: 1.78;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 18px;
}

.primary-action,
.secondary-action {
    height: 57px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
    border-radius: 7px;
    transition: transform .18s ease, box-shadow .18s ease;
}

.primary-action {
    min-width: 204px;
    color: #fff;
    background: linear-gradient(180deg, #2177ff 0%, #105df2 100%);
    box-shadow: 0 15px 26px rgba(23, 105, 255, .24);
}

.secondary-action {
    min-width: 190px;
    color: #1067ff;
    background: #fff;
    border: 1.5px solid #1769ff;
}

.primary-action:hover,
.secondary-action:hover {
    transform: translateY(-1px);
    box-shadow: 0 18px 30px rgba(23, 105, 255, .18);
}

.primary-action svg,
.secondary-action svg {
    width: 20px;
    height: 20px;
}

.hero-proofs {
    display: flex;
    flex-wrap: wrap;
    gap: 19px 34px;
    margin-top: 36px;
    color: #5c687c;
    font-size: 13px;
}

.hero-proofs span {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    white-space: nowrap;
}

.hero-proofs svg {
    width: 15px;
    height: 15px;
    color: #546176;
}

.hero-visual {
    position: relative;
    min-width: 0;
    transform: translateY(5px);
}

.support-app {
    width: min(780px, 100%);
    height: 468px;
    margin-left: auto;
    display: grid;
    grid-template-columns: 52px 168px minmax(330px, 1fr) 182px;
    overflow: hidden;
    background: #fff;
    border: 1px solid rgba(188, 206, 231, .8);
    border-radius: 14px;
    box-shadow: var(--shadow-lg);
}

.app-sidebar {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 20px 0 14px;
    color: #bdd7ff;
    background: linear-gradient(180deg, #001c3f 0%, #00254d 52%, #001a37 100%);
}

.app-sidebar span {
    width: 18px;
    height: 18px;
    display: grid;
    place-items: center;
}

.app-sidebar .side-avatar {
    width: 24px;
    height: 24px;
    margin-bottom: 9px;
    color: #fff;
    background: linear-gradient(180deg, #3d91ff, #1167f2);
    border-radius: 50%;
}

.app-sidebar .side-bottom {
    margin-top: auto;
}

.app-sidebar svg {
    width: 100%;
    height: 100%;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.conversation-list {
    background: #fbfdff;
    border-right: 1px solid var(--line);
}

.panel-head {
    height: 65px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px 0 18px;
    border-bottom: 1px solid var(--line);
}

.panel-head h2,
.chat-head h3,
.visitor-card h4 {
    margin: 0;
    color: #111827;
    font-size: 14px;
    font-weight: 800;
}

.panel-head p {
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 9px 0 0;
    color: #607087;
    font-size: 11px;
}

.panel-head p i {
    width: 6px;
    height: 6px;
    background: #22c55e;
    border-radius: 50%;
}

.panel-head button {
    width: 24px;
    height: 24px;
    display: grid;
    place-items: center;
    color: #5a6c84;
    background: #fff;
    border: 1px solid #dfe8f2;
    border-radius: 9px;
}

.panel-head svg,
.list-title svg {
    width: 13px;
    height: 13px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.6;
    stroke-linecap: round;
}

.list-title {
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 18px;
    color: #111827;
    font-size: 13px;
    font-weight: 700;
    border-bottom: 1px solid var(--line);
}

.group-title {
    position: relative;
    margin: 13px 0 7px;
    padding-left: 19px;
    color: #5c6b80;
    font-size: 11px;
    font-weight: 700;
}

.group-title::before {
    content: "";
    position: absolute;
    left: 10px;
    top: 3px;
    width: 0;
    height: 0;
    border-top: 4px solid transparent;
    border-bottom: 4px solid transparent;
    border-left: 5px solid #9fb0c5;
}

.visitor-row {
    position: relative;
    display: grid;
    grid-template-columns: 28px 1fr auto;
    align-items: center;
    gap: 10px;
    height: 56px;
    margin: 0 9px 1px;
    padding: 0 7px;
    border-radius: 9px;
}

.visitor-row.active {
    background: #eaf3ff;
}

.visitor-row img,
.avatar-face,
.user-dot {
    width: 28px;
    height: 28px;
    border-radius: 50%;
}

.avatar-face {
    position: relative;
    display: block;
    overflow: hidden;
    background: linear-gradient(180deg, #dff7f4, #a7e6dc);
    box-shadow: inset 0 -6px 0 rgba(20, 184, 166, .18);
}

.avatar-face::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 6px;
    width: 10px;
    height: 10px;
    background: #ffd8c4;
    border-radius: 50%;
    transform: translateX(-50%);
}

.avatar-face::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 4px;
    width: 18px;
    height: 9px;
    background: #1f7aff;
    border-radius: 10px 10px 4px 4px;
    transform: translateX(-50%);
}

.warm-face {
    background: linear-gradient(180deg, #fff2e8, #ffd2c7);
    box-shadow: inset 0 -6px 0 rgba(255, 119, 92, .2);
}

.warm-face::after {
    background: #ff6d5e;
}

.user-dot {
    display: grid;
    place-items: center;
    color: #fff;
    font-size: 10px;
    font-weight: 800;
}

.user-dot.blue {
    background: #4092ff;
}

.user-dot.green {
    background: #30c56b;
}

.visitor-row strong {
    display: block;
    margin-bottom: 4px;
    color: #2368de;
    font-size: 11px;
    font-weight: 700;
}

.visitor-row p {
    max-width: 82px;
    margin: 0;
    overflow: hidden;
    color: #677589;
    font-size: 9px;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.visitor-row time {
    align-self: start;
    margin-top: 15px;
    color: #79879a;
    font-size: 9px;
}

.chat-panel {
    display: flex;
    flex-direction: column;
    background: linear-gradient(180deg, #fff 0%, #fff 70%, #fbfdff 100%);
}

.chat-head {
    height: 65px;
    display: flex;
    align-items: center;
    padding: 0 15px;
    border-bottom: 1px solid var(--line);
}

.chat-head h3 {
    font-size: 15px;
}

.chat-head p {
    display: flex;
    align-items: center;
    gap: 5px;
    margin: 8px 0 0;
    color: #627087;
    font-size: 10px;
}

.chat-head svg {
    width: 12px;
    height: 12px;
    fill: none;
    stroke: #d59420;
    stroke-width: 1.6;
}

.message-area {
    position: relative;
    flex: 1;
    min-height: 0;
    padding: 22px 26px;
    background:
        radial-gradient(circle at 56% 41%, rgba(232, 241, 255, .52), transparent 35%),
        #fff;
}

.message {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 18px;
}

.message img,
.message .avatar-face {
    width: 29px;
    height: 29px;
    border-radius: 50%;
    box-shadow: 0 4px 10px rgba(22, 36, 55, .14);
}

.message p {
    margin: 0;
    padding: 11px 14px;
    color: #1e293b;
    font-size: 12px;
    line-height: 1.45;
    background: #fff;
    border: 1px solid #e8edf5;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(31, 61, 100, .08);
}

.message time {
    display: block;
    margin-top: 8px;
    color: #7b8798;
    font-size: 10px;
}

.message.right {
    justify-content: flex-end;
    margin-top: 34px;
    margin-bottom: 28px;
}

.message.right p {
    max-width: 205px;
    color: #fff;
    background: linear-gradient(180deg, #2580ff 0%, #0760f4 100%);
    border-color: transparent;
    border-radius: 12px 12px 4px 12px;
    box-shadow: 0 12px 23px rgba(23, 105, 255, .25);
}

.message.right time {
    text-align: right;
}

.message.left p {
    max-width: 230px;
}

.message.short {
    margin-top: 0;
}

.composer {
    height: 99px;
    padding: 12px 16px 14px;
    border-top: 1px solid var(--line);
}

.composer-tools {
    display: flex;
    align-items: center;
    gap: 17px;
    color: #5f6f86;
}

.composer-tools svg {
    width: 15px;
    height: 15px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.6;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.composer-bottom {
    display: flex;
    align-items: end;
    justify-content: space-between;
    margin-top: 19px;
}

.composer-bottom span {
    color: #9ba7b8;
    font-size: 12px;
}

.composer-bottom button,
.robot-card a {
    width: 55px;
    height: 28px;
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    background: linear-gradient(180deg, #2479ff, #0f60f4);
    border: 0;
    border-radius: 4px;
}

.visitor-card {
    padding: 13px 13px 0;
    background: #f7fbff;
}

.info-box {
    padding: 13px 13px 14px;
    margin-bottom: 11px;
    background: #fff;
    border-radius: 9px;
    box-shadow: 0 8px 22px rgba(38, 76, 122, .06);
}

.visitor-name {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 13px 0 14px;
    color: #374258;
    font-size: 11px;
    font-weight: 600;
}

.mini-avatar {
    width: 17px;
    height: 17px;
    display: grid;
    place-items: center;
    color: #fff;
    font-size: 8px;
    font-weight: 800;
    background: #2c82ff;
    border-radius: 50%;
}

.visitor-card dl {
    display: grid;
    grid-template-columns: 35px 1fr;
    gap: 10px 8px;
    margin: 0;
    font-size: 10px;
}

.visitor-card dt {
    color: #7b8799;
}

.visitor-card dd {
    margin: 0;
    color: #4d5d73;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-top: 13px;
}

.tags span,
.tags button {
    height: 21px;
    padding: 0 7px;
    color: #1770ff;
    font-size: 9px;
    font-weight: 700;
    background: #eaf3ff;
    border: 0;
    border-radius: 5px;
}

.tags button {
    width: 22px;
    padding: 0;
    color: #607087;
    background: #f3f6fb;
}

.quick-reply button {
    width: 100%;
    height: 25px;
    display: block;
    margin-top: 8px;
    padding: 0 8px;
    color: #64748b;
    font-size: 10px;
    text-align: left;
    background: #fbfdff;
    border: 1px solid #dfe8f2;
    border-radius: 5px;
}

.quick-reply .add-reply {
    width: auto;
    display: inline-block;
    padding: 0 10px;
    background: #fff;
}

.float-rail {
    position: fixed;
    z-index: 25;
    right: 16px;
    top: 50%;
    width: 64px;
    padding: 10px 0;
    display: flex;
    flex-direction: column;
    gap: 3px;
    background: #fff;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transform: translateY(-17%);
}

.float-rail a {
    min-height: 61px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    color: #13223b;
    font-size: 11px;
}

.float-rail a:first-child {
    color: #1769ff;
}

.float-rail a:hover {
    color: #1769ff;
}

.float-rail svg {
    width: 26px;
    height: 26px;
}

.robot-card {
    position: absolute;
    z-index: 7;
    right: 121px;
    bottom: -65px;
    width: 292px;
    min-height: 138px;
    display: grid;
    grid-template-columns: 74px 1fr;
    column-gap: 13px;
    padding: 20px 24px;
    background: #fff;
    border-radius: 33px;
    box-shadow: var(--shadow-lg);
}

.robot-face {
    grid-row: span 2;
    width: 66px;
    height: 66px;
}

.robot-face svg {
    width: 66px;
    height: 66px;
}

.robot-card p {
    margin: 5px 0 13px;
    color: #4a5669;
    font-size: 13px;
    line-height: 1.65;
}

.robot-card a {
    width: 109px;
    height: 37px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 5px;
}

.features {
    position: relative;
    z-index: 4;
    padding: 38px 0 64px;
    background: #fff;
}

.section-title {
    text-align: center;
}

.section-title h2 {
    margin: 0 0 13px;
    color: #111827;
    font-size: 31px;
    font-weight: 800;
    line-height: 1.35;
}

.section-title p {
    margin: 0;
    color: #526178;
    font-size: 16px;
}

.feature-grid {
    width: min(1384px, calc(100% - 96px));
    margin: 38px auto 0;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 18px;
}

.feature-grid article {
    min-height: 128px;
    display: grid;
    grid-template-columns: 64px 1fr;
    align-items: center;
    gap: 15px;
    padding: 22px 18px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 7px 18px rgba(28, 68, 120, .04);
}

.feature-icon {
    width: 64px;
    height: 64px;
    display: grid;
    place-items: center;
    border-radius: 50%;
}

.feature-icon svg {
    width: 49px;
    height: 49px;
}

.feature-icon.blue {
    color: #1769ff;
    background: #dcecff;
}

.feature-icon.green {
    color: #17b76a;
    background: #d8f7e8;
}

.feature-icon.purple {
    color: #7466f2;
    background: #e3e0ff;
}

.feature-icon.orange {
    color: #f28a24;
    background: #ffead1;
}

.feature-icon.sky {
    color: #1e9bff;
    background: #dff1ff;
}

.feature-grid h3 {
    margin: 0 0 10px;
    color: #111827;
    font-size: 17px;
    font-weight: 800;
    line-height: 1.2;
}

.feature-grid p {
    margin: 0;
    color: #4d5d73;
    font-size: 12px;
    line-height: 1.8;
}

.detail-section,
.features {
    scroll-margin-top: 88px;
}

.detail-section {
    padding: 64px 0;
    background: #fff;
}

.solutions-section {
    background: linear-gradient(180deg, #fff 0%, #f6fbff 100%);
}

.solution-grid,
.pricing-grid,
.help-grid {
    width: min(1384px, calc(100% - 96px));
    margin: 38px auto 0;
    display: grid;
    gap: 18px;
}

.solution-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.solution-grid article,
.pricing-grid article,
.help-grid article {
    position: relative;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: 0 10px 28px rgba(35, 80, 132, .06);
}

.solution-grid article {
    min-height: 214px;
    padding: 28px;
}

.solution-icon {
    width: 58px;
    height: 58px;
    display: grid;
    place-items: center;
    margin-bottom: 22px;
    border-radius: 16px;
}

.solution-icon svg {
    width: 42px;
    height: 42px;
}

.solution-icon.blue {
    color: #1769ff;
    background: #e6f0ff;
}

.solution-icon.green {
    color: #17b76a;
    background: #e2f9ee;
}

.solution-icon.purple {
    color: #7466f2;
    background: #eae7ff;
}

.solution-grid h3,
.pricing-grid h3,
.help-grid h3,
.about-panel h2 {
    margin: 0;
    color: #111827;
    font-weight: 800;
    line-height: 1.35;
}

.solution-grid h3 {
    font-size: 21px;
}

.solution-grid p,
.help-grid p,
.about-panel p {
    margin: 12px 0 0;
    color: #526178;
    font-size: 14px;
    line-height: 1.85;
}

.pricing-section {
    background: #f7fbff;
}

.pricing-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: stretch;
}

.pricing-grid article {
    min-height: 330px;
    padding: 30px;
}

.pricing-grid .featured-plan {
    border-color: rgba(23, 105, 255, .42);
    box-shadow: 0 18px 46px rgba(23, 105, 255, .13);
    transform: translateY(-10px);
}

.plan-label {
    position: absolute;
    top: 22px;
    right: 24px;
    height: 26px;
    padding: 0 10px;
    display: inline-flex;
    align-items: center;
    color: #fff;
    font-size: 12px;
    font-weight: 800;
    background: #1769ff;
    border-radius: 999px;
}

.pricing-grid h3 {
    font-size: 22px;
}

.price {
    margin: 18px 0 24px;
    color: #1769ff;
    font-size: 38px;
    font-weight: 900;
    line-height: 1;
}

.price span {
    margin-left: 5px;
    color: #718096;
    font-size: 14px;
    font-weight: 600;
}

.pricing-grid ul {
    padding: 0;
    margin: 0;
    list-style: none;
}

.pricing-grid li {
    position: relative;
    padding-left: 22px;
    margin-bottom: 13px;
    color: #46556d;
    font-size: 14px;
    line-height: 1.55;
}

.pricing-grid li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 7px;
    width: 8px;
    height: 8px;
    background: #1769ff;
    border-radius: 50%;
    box-shadow: 0 0 0 4px #e7f0ff;
}

.help-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.help-grid article {
    min-height: 172px;
    padding: 24px;
}

.help-grid h3 {
    font-size: 18px;
}

.about-section {
    padding-bottom: 82px;
    background:
        radial-gradient(circle at 12% 28%, rgba(211, 232, 255, .9), transparent 30%),
        linear-gradient(135deg, #eef6ff 0%, #ffffff 72%);
}

.about-panel {
    width: min(1220px, calc(100% - 96px));
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 44px;
    align-items: center;
    padding: 42px 48px;
    background: rgba(255, 255, 255, .86);
    border: 1px solid rgba(198, 217, 242, .9);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.about-kicker {
    display: block;
    margin-bottom: 13px;
    color: #1769ff;
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0;
}

.about-panel h2 {
    font-size: 32px;
}

.about-panel p {
    max-width: 650px;
    font-size: 16px;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 24px;
    background: #f7fbff;
    border: 1px solid #dce8f6;
    border-radius: 12px;
}

.about-stats strong {
    color: #1769ff;
    font-size: 31px;
    font-weight: 900;
    line-height: 1;
}

.about-stats span {
    margin-bottom: 10px;
    color: #526178;
    font-size: 13px;
}

.mobile-header,
.mobile-site {
    display: none;
}

@media (max-width: 1320px) {
    .header-inner,
    .hero-inner,
    .feature-grid {
        width: min(1160px, calc(100% - 48px));
    }

    .main-nav {
        gap: 24px;
    }

    .brand {
        min-width: 250px;
    }

    .brand-sub {
        margin-left: 12px;
        padding-left: 12px;
    }

    .hero-inner {
        grid-template-columns: 430px minmax(570px, 1fr);
        gap: 18px;
    }

    .hero h1 {
        font-size: 52px;
    }

    .support-app {
        grid-template-columns: 48px 150px minmax(300px, 1fr);
    }

    .visitor-card {
        display: none;
    }

    .robot-card {
        right: 76px;
    }

    .feature-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .solution-grid,
    .pricing-grid,
    .help-grid,
    .about-panel {
        width: min(1160px, calc(100% - 48px));
    }

    .help-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 1024px) {
    .site-header {
        height: 68px;
    }

    .header-inner {
        width: calc(100% - 34px);
        gap: 18px;
    }

    .brand {
        min-width: auto;
    }

    .brand-sub,
    .main-nav a:nth-child(n+4) {
        display: none;
    }

    .main-nav {
        justify-content: flex-end;
        gap: 20px;
    }

    .header-actions {
        gap: 14px;
    }

    .hero {
        padding-top: 68px;
        min-height: auto;
    }

    .hero-inner {
        width: calc(100% - 34px);
        min-height: 0;
        grid-template-columns: 1fr;
        padding: 64px 0 120px;
    }

    .hero-copy {
        padding-top: 0;
    }

    .hero h1 {
        font-size: 46px;
    }

    .hero-desc {
        max-width: 680px;
    }

    .support-app {
        width: 100%;
        margin: 0;
    }

    .robot-card {
        right: 34px;
        bottom: -48px;
    }

    .float-rail {
        display: none;
    }

    .features {
        padding-top: 78px;
    }
}

@media (max-width: 760px) {
    body {
        background: #f4f8ff;
    }

    .desktop-header,
    .desktop-site {
        display: none;
    }

    .mobile-header {
        position: sticky;
        top: 0;
        z-index: 40;
        height: 62px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 16px;
        background: rgba(255, 255, 255, .94);
        border-bottom: 1px solid rgba(206, 221, 242, .82);
        backdrop-filter: blur(18px);
    }

    .mobile-brand {
        display: inline-flex;
        align-items: center;
        gap: 9px;
        color: #101828;
        font-size: 21px;
        font-weight: 900;
    }

    .mobile-brand .brand-mark,
    .mobile-brand .brand-mark svg {
        width: 34px;
        height: 34px;
        margin: 0;
    }

    .mobile-header-btn {
        height: 34px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 0 15px;
        color: #fff;
        font-size: 14px;
        font-weight: 800;
        background: linear-gradient(180deg, #2d80ff, #0e61f2);
        border-radius: 999px;
        box-shadow: 0 10px 22px rgba(23, 105, 255, .22);
    }

    .mobile-site {
        display: block;
        overflow: hidden;
    }

    .mobile-hero {
        position: relative;
        padding: 16px 16px 34px;
        background:
            radial-gradient(circle at 100% 0, rgba(111, 173, 255, .38), transparent 34%),
            linear-gradient(180deg, #eef6ff 0%, #f7fbff 72%, #fff 100%);
    }

    .mobile-hero::before {
        content: "";
        position: absolute;
        left: 28px;
        right: 28px;
        top: 104px;
        height: 180px;
        border: 1px solid rgba(95, 147, 220, .14);
        border-radius: 50%;
        transform: rotate(-13deg);
    }

    .mobile-tabs {
        position: relative;
        z-index: 2;
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 8px;
        padding: 5px;
        background: rgba(255, 255, 255, .88);
        border: 1px solid rgba(211, 225, 244, .9);
        border-radius: 16px;
        box-shadow: 0 10px 26px rgba(39, 83, 137, .08);
    }

    .mobile-tabs a {
        height: 36px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        color: #41516a;
        font-size: 13px;
        font-weight: 800;
        border-radius: 12px;
    }

    .mobile-tabs a:first-child {
        color: #1769ff;
        background: #eaf3ff;
    }

    .mobile-hero-copy {
        position: relative;
        z-index: 2;
        margin-top: 30px;
    }

    .mobile-hero h1 {
        margin: 0;
        color: #0b1324;
        font-size: 42px;
        font-weight: 900;
        line-height: 1.14;
        letter-spacing: 0;
    }

    .mobile-hero-copy p {
        margin: 15px 0 0;
        color: #40516b;
        font-size: 15px;
        line-height: 1.78;
    }

    .mobile-cta-row {
        position: relative;
        z-index: 2;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 12px;
        margin-top: 24px;
    }

    .mobile-primary,
    .mobile-secondary {
        height: 48px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        font-weight: 900;
        border-radius: 13px;
    }

    .mobile-primary {
        color: #fff;
        background: linear-gradient(180deg, #267cff, #0f60f4);
        box-shadow: 0 14px 26px rgba(23, 105, 255, .24);
    }

    .mobile-secondary {
        color: #1769ff;
        background: #fff;
        border: 1.5px solid rgba(23, 105, 255, .45);
    }

    .mobile-console {
        position: relative;
        z-index: 2;
        margin-top: 26px;
        padding: 14px;
        background: #fff;
        border: 1px solid rgba(201, 219, 244, .95);
        border-radius: 24px;
        box-shadow: 0 22px 46px rgba(30, 83, 150, .15);
    }

    .mobile-console-top,
    .mobile-chat-head,
    .mobile-reply-bar,
    .mobile-price-card > div,
    .mobile-plan-links {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    .mobile-console-top {
        color: #111827;
        font-size: 14px;
        font-weight: 900;
    }

    .mobile-console-top span {
        width: 34px;
        height: 34px;
        background: linear-gradient(180deg, #0d2b4d, #08386d);
        border-radius: 12px;
    }

    .mobile-console-top em {
        height: 24px;
        display: inline-flex;
        align-items: center;
        padding: 0 9px;
        color: #17b76a;
        font-size: 12px;
        font-style: normal;
        font-weight: 900;
        background: #e8f9ef;
        border-radius: 999px;
    }

    .mobile-stat-row {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
        margin-top: 14px;
    }

    .mobile-stat-row div {
        min-height: 74px;
        padding: 13px 8px;
        background: #f4f8ff;
        border: 1px solid #e3ecf8;
        border-radius: 16px;
        text-align: center;
    }

    .mobile-stat-row strong {
        display: block;
        color: #1769ff;
        font-size: 21px;
        font-weight: 900;
        line-height: 1;
    }

    .mobile-stat-row span {
        display: block;
        margin-top: 8px;
        color: #64748b;
        font-size: 11px;
        font-weight: 700;
    }

    .mobile-chat-card {
        margin-top: 12px;
        padding: 14px;
        background:
            radial-gradient(circle at 82% 28%, rgba(219, 236, 255, .9), transparent 38%),
            #fbfdff;
        border: 1px solid #e3ecf8;
        border-radius: 18px;
    }

    .mobile-chat-head {
        gap: 10px;
    }

    .mobile-avatar {
        width: 34px;
        height: 34px;
        display: grid;
        place-items: center;
        flex: 0 0 auto;
        color: #fff;
        font-size: 13px;
        font-weight: 900;
        background: #2c82ff;
        border-radius: 50%;
    }

    .mobile-chat-head div {
        flex: 1 1 auto;
        min-width: 0;
    }

    .mobile-chat-head strong {
        display: block;
        color: #13223b;
        font-size: 14px;
        font-weight: 900;
    }

    .mobile-chat-head p {
        margin: 4px 0 0;
        color: #728096;
        font-size: 11px;
    }

    .mobile-chat-head em {
        color: #7c8798;
        font-size: 11px;
        font-style: normal;
    }

    .mobile-bubble {
        width: fit-content;
        max-width: 84%;
        margin-top: 12px;
        padding: 11px 13px;
        font-size: 13px;
        line-height: 1.55;
        border-radius: 14px;
        box-shadow: 0 8px 18px rgba(31, 61, 100, .08);
    }

    .mobile-bubble.left {
        color: #243147;
        background: #fff;
        border: 1px solid #e7eef7;
    }

    .mobile-bubble.right {
        margin-left: auto;
        color: #fff;
        background: linear-gradient(180deg, #2580ff, #0760f4);
        border-radius: 14px 14px 4px 14px;
    }

    .mobile-reply-bar {
        height: 42px;
        margin-top: 14px;
        padding: 0 8px 0 14px;
        background: #fff;
        border: 1px solid #e2eaf5;
        border-radius: 13px;
    }

    .mobile-reply-bar span {
        color: #94a1b4;
        font-size: 13px;
    }

    .mobile-reply-bar button {
        width: 58px;
        height: 30px;
        color: #fff;
        font-size: 12px;
        font-weight: 900;
        background: #1769ff;
        border: 0;
        border-radius: 9px;
    }

    .mobile-section {
        padding: 34px 16px;
        background: #fff;
    }

    .mobile-section + .mobile-section {
        border-top: 1px solid #edf2f8;
    }

    .mobile-section-title span {
        display: block;
        margin-bottom: 9px;
        color: #1769ff;
        font-size: 11px;
        font-weight: 900;
        letter-spacing: 0;
    }

    .mobile-section-title h2,
    .mobile-about h2 {
        margin: 0;
        color: #111827;
        font-size: 25px;
        font-weight: 900;
        line-height: 1.28;
    }

    .mobile-feature-list {
        display: grid;
        gap: 12px;
        margin-top: 20px;
    }

    .mobile-feature-list article {
        display: grid;
        grid-template-columns: 50px 1fr;
        gap: 13px;
        align-items: center;
        min-height: 92px;
        padding: 16px;
        background: #fbfdff;
        border: 1px solid #dfe9f6;
        border-radius: 18px;
        box-shadow: 0 9px 20px rgba(28, 68, 120, .05);
    }

    .mobile-icon {
        width: 50px;
        height: 50px;
        display: grid;
        place-items: center;
        border-radius: 17px;
    }

    .mobile-icon svg {
        width: 32px;
        height: 32px;
    }

    .mobile-icon.blue {
        color: #1769ff;
        background: #e3f0ff;
    }

    .mobile-icon.green {
        color: #18b96b;
        background: #e1f8ed;
    }

    .mobile-icon.purple {
        color: #7466f2;
        background: #e9e6ff;
    }

    .mobile-icon.orange {
        color: #f28a24;
        background: #ffead1;
    }

    .mobile-feature-list h3 {
        margin: 0 0 7px;
        color: #13223b;
        font-size: 16px;
        font-weight: 900;
    }

    .mobile-feature-list p,
    .mobile-scene-stack p,
    .mobile-help p,
    .mobile-about p {
        margin: 0;
        color: #59667a;
        font-size: 13px;
        line-height: 1.72;
    }

    .mobile-solutions,
    .mobile-pricing {
        background: #f7fbff;
    }

    .mobile-scene-stack {
        display: grid;
        gap: 10px;
        margin-top: 20px;
    }

    .mobile-scene-stack article {
        padding: 18px;
        background: #fff;
        border: 1px solid #dfe9f6;
        border-radius: 18px;
    }

    .mobile-scene-stack strong {
        display: block;
        margin-bottom: 7px;
        color: #111827;
        font-size: 16px;
        font-weight: 900;
    }

    .mobile-price-card {
        margin-top: 20px;
        padding: 22px;
        color: #fff;
        background:
            radial-gradient(circle at 100% 0, rgba(255, 255, 255, .28), transparent 36%),
            linear-gradient(145deg, #0b63f4, #1f82ff);
        border-radius: 22px;
        box-shadow: 0 18px 38px rgba(23, 105, 255, .24);
    }

    .mobile-price-card strong {
        font-size: 20px;
        font-weight: 900;
    }

    .mobile-price-card div span {
        height: 25px;
        display: inline-flex;
        align-items: center;
        padding: 0 10px;
        color: #1769ff;
        font-size: 12px;
        font-weight: 900;
        background: #fff;
        border-radius: 999px;
    }

    .mobile-price {
        margin: 22px 0 20px;
        font-size: 42px;
        font-weight: 900;
        line-height: 1;
    }

    .mobile-price em {
        margin-left: 5px;
        font-size: 14px;
        font-style: normal;
        font-weight: 700;
        opacity: .85;
    }

    .mobile-price-card ul {
        padding: 0;
        margin: 0;
        list-style: none;
    }

    .mobile-price-card li {
        position: relative;
        padding-left: 18px;
        margin-top: 11px;
        font-size: 14px;
        line-height: 1.5;
    }

    .mobile-price-card li::before {
        content: "";
        position: absolute;
        left: 0;
        top: 8px;
        width: 7px;
        height: 7px;
        background: #fff;
        border-radius: 50%;
    }

    .mobile-plan-links {
        gap: 10px;
        margin-top: 12px;
    }

    .mobile-plan-links span {
        flex: 1 1 0;
        min-height: 44px;
        display: grid;
        place-items: center;
        color: #40516b;
        font-size: 13px;
        font-weight: 800;
        background: #fff;
        border: 1px solid #dfe9f6;
        border-radius: 14px;
    }

    .mobile-help details {
        margin-top: 12px;
        padding: 16px;
        background: #fbfdff;
        border: 1px solid #dfe9f6;
        border-radius: 16px;
    }

    .mobile-help summary {
        cursor: default;
        color: #13223b;
        font-size: 15px;
        font-weight: 900;
        list-style: none;
    }

    .mobile-help summary::-webkit-details-marker {
        display: none;
    }

    .mobile-help summary::after {
        content: "+";
        float: right;
        color: #1769ff;
        font-weight: 900;
    }

    .mobile-help details[open] summary::after {
        content: "-";
    }

    .mobile-help p {
        margin-top: 10px;
    }

    .mobile-about {
        padding-bottom: 44px;
        background:
            radial-gradient(circle at 12% 26%, rgba(219, 236, 255, .95), transparent 32%),
            linear-gradient(180deg, #fff, #eef6ff);
    }

    .mobile-about p {
        margin-top: 12px;
    }
}

@media (max-width: 480px) {
    .mobile-hero h1 {
        font-size: 38px;
    }

    .mobile-hero-copy p {
        font-size: 14px;
    }

    .mobile-section-title h2,
    .mobile-about h2 {
        font-size: 23px;
    }
}