:root {
    --bg: #fdfcf9;
    --ink: #12162b;
    --muted: #5a6075;
    --line: rgba(18, 22, 43, 0.1);
    --card: #ffffff;
    --stage: #f1efea;
    --accent: #4a54e6;
    --violet: #8b5cf6;
    --cyan: #67d4fb;
    --night: #0b0a24;
    --radius: 20px;
    --wrap: 1120px;
    --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB",
        "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

html[data-lang="zh"] [lang="en"],
html[data-lang="en"] [lang="zh"] {
    display: none !important;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font: 17px/1.65 var(--font);
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 6px;
}

h1,
h2,
h3,
p {
    margin: 0;
}

code {
    font: 0.9em var(--mono);
    background: rgba(18, 22, 43, 0.06);
    padding: 0.1em 0.4em;
    border-radius: 6px;
}

.wrap {
    max-width: var(--wrap);
    margin: 0 auto;
    padding: 0 24px;
}

section {
    padding: 96px 0;
    scroll-margin-top: 56px;
}

.eyebrow {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 12px;
}

h2 {
    font-size: clamp(30px, 4.4vw, 46px);
    line-height: 1.15;
    letter-spacing: -0.02em;
    font-weight: 700;
    text-wrap: balance;
}

h3 {
    font-size: 21px;
    line-height: 1.3;
    font-weight: 650;
}

.lead {
    font-size: clamp(18px, 2vw, 21px);
    color: var(--muted);
    max-width: 46em;
    margin-top: 20px;
}

.caption {
    font-size: 14px;
    color: var(--muted);
}

/* Navigation */

.nav {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(253, 252, 249, 0.82);
    -webkit-backdrop-filter: saturate(160%) blur(16px);
    backdrop-filter: saturate(160%) blur(16px);
    border-bottom: 1px solid var(--line);
}

.nav .wrap {
    display: flex;
    align-items: center;
    gap: 28px;
    height: 56px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 18px;
    letter-spacing: -0.01em;
    color: var(--ink);
}

.brand:hover {
    text-decoration: none;
}

.brand img {
    width: 28px;
    height: 28px;
}

.nav-links {
    display: flex;
    gap: 24px;
    margin-left: auto;
    font-size: 15px;
}

.nav-links a {
    color: var(--muted);
}

.nav-links a:hover {
    color: var(--ink);
    text-decoration: none;
}

.lang-switch {
    font: 600 13px var(--font);
    color: var(--ink);
    background: none;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 5px 12px;
    cursor: pointer;
}

.lang-switch:hover {
    border-color: var(--ink);
}

/* Hero */

.hero {
    padding: 72px 0 0;
    text-align: center;
    background:
        radial-gradient(520px 320px at 50% 90px, rgba(139, 92, 246, 0.16), transparent 70%),
        radial-gradient(420px 260px at 62% 60px, rgba(103, 212, 251, 0.14), transparent 70%);
}

.hero-icon {
    width: 112px;
    height: 112px;
    margin: 0 auto 20px;
    filter: drop-shadow(0 18px 30px rgba(41, 28, 120, 0.28));
}

.pill {
    display: inline-flex;
    gap: 8px;
    align-items: center;
    font-size: 13px;
    font-weight: 600;
    color: var(--muted);
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.7);
    border-radius: 999px;
    padding: 4px 14px;
    margin-bottom: 22px;
}

.pill b {
    color: var(--accent);
    font-weight: 700;
}

.wordmark {
    font-size: clamp(60px, 11vw, 124px);
    line-height: 1;
    letter-spacing: -0.045em;
    font-weight: 750;
}

.wordmark span {
    background: linear-gradient(100deg, var(--accent), var(--violet));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.cn-name {
    font-size: 20px;
    letter-spacing: 0.5em;
    margin: 14px -0.5em 0 0;
    color: var(--muted);
}

.tagline {
    font-size: clamp(22px, 3.2vw, 32px);
    font-weight: 600;
    letter-spacing: -0.015em;
    margin-top: 18px;
}

.hero .lead {
    margin: 18px auto 0;
    max-width: 40em;
}

.cta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin-top: 32px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 999px;
    padding: 12px 24px;
    border: 1px solid var(--ink);
    color: var(--ink);
    transition: transform 0.15s ease, background 0.15s ease;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-1px);
}

.btn.primary {
    background: var(--ink);
    color: #fff;
}

.btn.primary:hover {
    background: #252b4d;
}

.btn svg {
    width: 16px;
    height: 16px;
}

.hero .caption {
    margin-top: 14px;
}

.apps-strip {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 18px 10px;
    max-width: 960px;
    margin: 36px auto 0;
    padding: 0;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.3;
    color: var(--muted);
}

.apps-strip li {
    width: 92px;
}

.apps-strip img {
    width: 68px;
    height: 68px;
    margin: 0 auto 6px;
}

.cover {
    max-width: 1168px;
    margin: 52px auto 0;
    padding: 0 24px;
}

.cover img {
    width: 100%;
    height: auto;
    border-radius: 28px;
    box-shadow: 0 34px 90px rgba(76, 52, 190, 0.3), 0 6px 18px rgba(18, 22, 43, 0.2);
}

.scenes {
    max-width: 1280px;
    margin: 28px auto 40px;
}

.scenes img {
    width: 100%;
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 4%, #000 96%, transparent);
    mask-image: linear-gradient(90deg, transparent, #000 4%, #000 96%, transparent);
}

.scenes .caption {
    margin-top: 6px;
    text-align: center;
}

/* Why */

.why p + p {
    margin-top: 18px;
}

.why .body {
    max-width: 44em;
    margin-top: 28px;
    font-size: 19px;
    color: #2b3046;
}

.why strong {
    color: var(--ink);
}

/* Features */

.grid {
    display: grid;
    gap: 16px;
    margin-top: 44px;
}

.features {
    grid-template-columns: repeat(6, 1fr);
}

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

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

.features .card.wide {
    grid-column: span 4;
}

.verb {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 10px;
}

.verb .num {
    font: 600 13px var(--mono);
    color: var(--accent);
}

.verb h3 {
    font-size: 26px;
    letter-spacing: -0.01em;
}

.card p {
    color: var(--muted);
    font-size: 16px;
}

.card p + p,
.card h3 + p {
    margin-top: 10px;
}

.say {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 14px 0 4px;
}

.say span {
    font-size: 15px;
    color: var(--ink);
    background: linear-gradient(100deg, rgba(74, 84, 230, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: 14px 14px 14px 4px;
    padding: 8px 14px;
}

.split {
    display: grid;
    grid-template-columns: minmax(0, 420px) 1fr;
    gap: 56px;
    align-items: center;
    margin-top: 72px;
}

.split figure {
    margin: 0;
}

.split figure img {
    border-radius: 28px;
    box-shadow: 0 30px 60px -20px rgba(18, 22, 43, 0.28);
}

.split figcaption {
    margin-top: 16px;
    text-align: center;
}

.split p {
    color: var(--muted);
    margin-top: 16px;
    font-size: 18px;
}

/* Devices */

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

.card.device {
    padding: 0;
    overflow: hidden;
}

.device .stage {
    height: 260px;
    display: grid;
    place-items: center;
    padding: 28px;
    background: radial-gradient(120% 90% at 50% 20%, #f7f6f2, #e8e6e0);
}

.device .stage img {
    max-height: 204px;
    width: auto;
}

.device .info {
    padding: 22px 26px 26px;
}

.device dl {
    margin: 12px 0 0;
    font-size: 15px;
    color: var(--muted);
}

.device dt {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    margin-top: 10px;
}

.device dd {
    margin: 0;
    color: var(--ink);
}

.note {
    margin-top: 28px;
    color: var(--muted);
    max-width: 50em;
}

.disclaimer {
    margin-top: 14px;
    font-size: 14px;
    color: var(--muted);
    max-width: 62em;
}

/* Apps table */

.table-scroll {
    margin-top: 40px;
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--card);
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 15px;
}

th,
td {
    text-align: center;
    padding: 14px 12px;
    border-bottom: 1px solid var(--line);
}

th:first-child {
    text-align: left;
    padding-left: 20px;
}

thead th {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--muted);
    background: #faf9f6;
    word-break: keep-all;
}

tbody tr:last-child td,
tbody tr:last-child th {
    border-bottom: 0;
}

.app {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
}

.app .icons {
    display: flex;
    flex: none;
}

.app img {
    width: 32px;
    height: 32px;
}

.app img + img {
    margin-left: -6px;
}

.app small {
    display: block;
    font-size: 13px;
    font-weight: 400;
    color: var(--muted);
}

td.yes {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--accent);
}

td.yes small {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--muted);
    word-break: keep-all;
}

td.no {
    color: #b7bac9;
}

/* Computer use */

.night {
    background:
        radial-gradient(900px 480px at 85% -10%, rgba(139, 92, 246, 0.38), transparent 70%),
        radial-gradient(700px 420px at 0% 110%, rgba(56, 189, 248, 0.16), transparent 70%),
        var(--night);
    color: #f3f2ff;
}

.night .eyebrow {
    color: #b8a6ff;
}

.night .lead {
    color: #b9b8d6;
}

.night .card {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.12);
}

.night .card p,
.night dd {
    color: #c4c3de;
}

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

.paths h3 {
    font-size: 24px;
}

.paths .status {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: #0b0a24;
    background: #b8a6ff;
    border-radius: 999px;
    padding: 2px 12px;
    margin-top: 10px;
}

.paths dl {
    margin: 18px 0 0;
}

.paths dt {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #8f8db8;
    margin-top: 16px;
}

.paths dd {
    margin: 4px 0 0;
    font-size: 16px;
}

.rules {
    grid-template-columns: repeat(2, 1fr);
    margin-top: 16px;
}

.rules h3 {
    font-size: 18px;
    margin-bottom: 6px;
    color: #fff;
}

/* Install */

.install {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 16px;
    margin-top: 44px;
}

.install ol {
    margin: 18px 0 0;
    padding-left: 1.3em;
    color: var(--muted);
    font-size: 16px;
}

.install li + li {
    margin-top: 10px;
}

.install .cta {
    justify-content: flex-start;
    margin-top: 20px;
}

.install .fine {
    margin-top: 18px;
    font-size: 14px;
}

/* Privacy */

.privacy .body {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-top: 32px;
    color: var(--muted);
    font-size: 16px;
}

/* Footer */

footer {
    border-top: 1px solid var(--line);
    padding: 40px 0 56px;
    font-size: 15px;
    color: var(--muted);
}

footer p {
    max-width: 56em;
}

footer p + p {
    margin-top: 12px;
}

footer .soon {
    font-size: 17px;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 14px;
}

footer .credit {
    font-size: 14px;
}

@media (max-width: 900px) {
    section {
        padding: 72px 0;
    }

    .nav-links {
        display: none;
    }

    .lang-switch {
        margin-left: auto;
    }

    .features .card,
    .features .card.wide {
        grid-column: span 3;
    }

    .features .card.wide {
        grid-column: span 6;
    }

    .split {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .split figure {
        max-width: 420px;
        margin: 0 auto;
    }

    .devices,
    .paths,
    .rules,
    .install,
    .privacy .body {
        grid-template-columns: 1fr;
    }

    .privacy .body {
        gap: 18px;
    }
}

@media (max-width: 600px) {
    body {
        font-size: 16px;
    }

    .wrap {
        padding: 0 16px;
    }

    .hero {
        padding-top: 48px;
    }

    .features .card,
    .features .card.wide {
        grid-column: span 6;
    }

    .card {
        padding: 22px;
    }

    h2 br {
        display: none;
    }

    .apps-strip {
        gap: 14px 4px;
    }

    .apps-strip li {
        width: 76px;
    }

    .apps-strip img {
        width: 52px;
        height: 52px;
    }

    table {
        font-size: 14px;
    }

    th,
    td {
        padding: 12px 3px;
    }

    th:first-child {
        padding-left: 12px;
    }

    thead th {
        font-size: 11px;
        letter-spacing: 0;
        text-transform: none;
    }

    .app {
        gap: 8px;
    }

    .app img {
        width: 24px;
        height: 24px;
    }

    .app small,
    td.yes small {
        font-size: 11px;
    }

    .cover {
        margin-top: 36px;
        padding: 0 14px;
    }

    .cover img {
        border-radius: 16px;
    }

    .scenes {
        overflow: hidden;
    }

    /* Four scenes are unreadable at phone width; show two and let the strip scroll. */
    .scenes .strip {
        overflow-x: auto;
    }

    .scenes img {
        width: 200%;
        max-width: none;
        -webkit-mask-image: none;
        mask-image: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .btn {
        transition: none;
    }
}