:root {
    --blue: #2f87ff;
    --blue-dark: #1268ee;
    --ink: #172033;
    --muted: #667085;
    --line: #d8e4f2;
    --pale: #eef6ff;
    --white: #ffffff;
    --dark: #05070b;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--white);
    font-family: "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

button,
a {
    font: inherit;
}

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

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

.site-header {
    position: absolute;
    z-index: 20;
    top: 0;
    left: 0;
    right: 0;
    height: 76px;
    color: #f8fbff;
}

.nav-wrap {
    width: min(1180px, calc(100% - 48px));
    height: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: .02em;
}

.brand img {
    width: 36px;
    height: 36px;
    object-fit: contain;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
    color: rgba(255, 255, 255, .72);
    font-size: 14px;
}

.nav-links a {
    transition: color .2s ease, background .2s ease;
}

.nav-links a:hover {
    color: #fff;
}

.nav-links .nav-download {
    padding: 10px 21px;
    color: #fff;
    background: var(--blue);
    border-radius: 11px;
}

.nav-links .nav-download:hover {
    background: #4b96ff;
}

.hero {
    position: relative;
    min-height: 920px;
    padding: 132px 24px 72px;
    overflow: hidden;
    color: #fff;
    background:
        linear-gradient(180deg, rgba(5, 7, 11, .1) 0%, rgba(5, 7, 11, .2) 65%, #07111f 100%),
        var(--dark);
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    opacity: .24;
    pointer-events: none;
    background-image: radial-gradient(rgba(255, 255, 255, .35) .6px, transparent .6px);
    background-size: 24px 24px;
    mask-image: linear-gradient(to bottom, transparent, black 30%, transparent 88%);
}

.hero-glow {
    position: absolute;
    width: 760px;
    height: 500px;
    bottom: -130px;
    border-radius: 50%;
    filter: blur(35px);
    opacity: .42;
    pointer-events: none;
}

.hero-glow-left {
    left: -180px;
    background: #0050c8;
}

.hero-glow-right {
    right: -190px;
    background: #008cff;
}

.hero-inner {
    position: relative;
    z-index: 2;
    width: min(1120px, 100%);
    margin: 0 auto;
    text-align: center;
}

.hero-kicker {
    margin: 0 0 20px;
    color: #78b5ff;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: .18em;
}

.hero h1 {
    margin: 0;
    font-size: clamp(40px, 5vw, 64px);
    line-height: 1.18;
    letter-spacing: -.04em;
}

.hero-copy {
    max-width: 680px;
    margin: 22px auto 26px;
    color: rgba(255, 255, 255, .68);
    font-size: 18px;
    line-height: 1.8;
}

.hero-points {
    margin: 0 auto 28px;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 28px;
    color: rgba(255, 255, 255, .82);
    list-style: none;
    font-size: 14px;
}

.hero-points li {
    display: flex;
    align-items: center;
    gap: 7px;
}

.hero-points span {
    color: #8ec0ff;
}

.download-button {
    min-width: 224px;
    height: 64px;
    padding: 0 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: #fff;
    background: linear-gradient(135deg, #45a0ff, #176ff5);
    border: 0;
    border-radius: 32px;
    box-shadow: 0 13px 35px rgba(38, 127, 255, .35);
    cursor: pointer;
    font-size: 22px;
    font-weight: 700;
    transition: transform .2s ease, box-shadow .2s ease;
}

.download-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 17px 45px rgba(38, 127, 255, .48);
}

.download-button:focus-visible,
.back-download:focus-visible,
.nav-links a:focus-visible {
    outline: 3px solid #9ecbff;
    outline-offset: 4px;
}

.download-button svg {
    width: 23px;
    height: 23px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.9;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.download-note {
    margin: 12px 0 38px;
    color: rgba(255, 255, 255, .42);
    font-size: 12px;
}

.product-stage {
    width: min(1020px, 94%);
    margin: 0 auto;
    padding: 13px 13px 0;
    overflow: hidden;
    background: linear-gradient(180deg, #182434, #07101c);
    border: 1px solid rgba(255, 255, 255, .2);
    border-radius: 26px 26px 0 0;
    box-shadow: 0 36px 120px rgba(0, 87, 220, .35);
}

.stage-topbar {
    height: 30px;
    padding: 0 2px;
    display: flex;
    align-items: center;
    gap: 7px;
    color: rgba(255, 255, 255, .5);
    font-size: 11px;
    text-align: left;
}

.stage-topbar i {
    width: 8px;
    height: 8px;
    background: rgba(255, 255, 255, .25);
    border-radius: 50%;
}

.stage-topbar span {
    margin-left: 8px;
}

.product-stage img {
    width: 100%;
    border-radius: 13px 13px 0 0;
}

.section {
    padding: 106px 24px;
}

.features {
    background: var(--pale);
}

.section-heading {
    width: min(760px, 100%);
    margin: 0 auto 50px;
    text-align: center;
}

.section-heading > span {
    display: inline-block;
    margin-bottom: 14px;
    color: var(--blue-dark);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: .12em;
}

.section-heading h2 {
    margin: 0;
    color: #111827;
    font-size: clamp(32px, 4vw, 48px);
    line-height: 1.25;
    letter-spacing: -.04em;
}

.section-heading p {
    margin: 18px auto 0;
    color: var(--muted);
    font-size: 16px;
    line-height: 1.8;
}

.feature-grid {
    width: min(1180px, 100%);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.feature-card {
    min-height: 240px;
    padding: 32px;
    background: rgba(255, 255, 255, .92);
    border: 1px solid rgba(198, 216, 237, .85);
    border-radius: 22px;
    box-shadow: 0 12px 35px rgba(42, 79, 122, .06);
}

.feature-card-large {
    grid-row: span 2;
    display: flex;
    min-height: 498px;
    flex-direction: column;
    justify-content: flex-end;
    background:
        radial-gradient(circle at 55% 24%, rgba(83, 159, 255, .32), transparent 30%),
        linear-gradient(160deg, #f7fbff, #deedff);
}

.feature-icon {
    width: 50px;
    height: 50px;
    margin-bottom: 34px;
    display: grid;
    place-items: center;
    border-radius: 15px;
    font-size: 22px;
    font-weight: 800;
}

.feature-card-large .feature-icon {
    width: 84px;
    height: 84px;
    margin-bottom: auto;
    border-radius: 24px;
    font-size: 35px;
    box-shadow: 0 18px 40px rgba(47, 135, 255, .2);
}

.feature-icon.blue { color: #0d6df0; background: #d8eaff; }
.feature-icon.violet { color: #7d4ce1; background: #eee5ff; }
.feature-icon.cyan { color: #0086aa; background: #d9f7ff; }
.feature-icon.green { color: #178f69; background: #ddf8ed; }
.feature-icon.orange { color: #d97813; background: #fff0d9; }

.feature-card h3 {
    margin: 0 0 13px;
    color: #172033;
    font-size: 21px;
}

.feature-card p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.8;
}

.preview {
    color: #fff;
    background: #07101c;
}

.light-heading h2 {
    color: #fff;
}

.light-heading p {
    color: rgba(255, 255, 255, .55);
}

.showcase {
    width: min(1180px, 100%);
    margin: 0 auto 34px;
    padding: 34px;
    display: grid;
    grid-template-columns: minmax(0, 1.55fr) minmax(280px, .75fr);
    align-items: center;
    gap: 46px;
    background: linear-gradient(145deg, rgba(20, 34, 52, .95), rgba(10, 19, 32, .98));
    border: 1px solid rgba(126, 181, 255, .16);
    border-radius: 28px;
}

.showcase-home,
.showcase-last {
    grid-template-columns: minmax(280px, .75fr) minmax(0, 1.55fr);
}

.showcase-copy {
    padding: 12px 8px;
}

.showcase-copy .step {
    display: inline-grid;
    width: 48px;
    height: 30px;
    margin-bottom: 18px;
    place-items: center;
    color: #91c4ff;
    background: rgba(47, 135, 255, .14);
    border: 1px solid rgba(102, 172, 255, .25);
    border-radius: 15px;
    font-size: 12px;
    font-weight: 700;
}

.showcase-copy h3 {
    margin: 0 0 16px;
    font-size: 28px;
    line-height: 1.35;
}

.showcase-copy p {
    margin: 0 0 21px;
    color: rgba(255, 255, 255, .58);
    font-size: 15px;
    line-height: 1.8;
}

.showcase-copy ul {
    margin: 0;
    padding: 0;
    display: grid;
    gap: 12px;
    color: rgba(255, 255, 255, .82);
    list-style: none;
    font-size: 14px;
}

.showcase-copy li::before {
    content: "✓";
    margin-right: 10px;
    color: #62a9ff;
    font-weight: 700;
}

.shot-card {
    margin: 0;
    padding: 9px;
    overflow: hidden;
    background: #eaf3ff;
    border: 1px solid rgba(255, 255, 255, .18);
    border-radius: 18px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, .28);
}

.shot-card img {
    width: 100%;
    border-radius: 11px;
}

.reasons {
    background: #fff;
}

.reason-grid {
    width: min(1180px, 100%);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.reason-grid article {
    min-height: 215px;
    padding: 34px 30px;
    border-right: 1px solid var(--line);
}

.reason-grid article:last-child {
    border-right: 0;
}

.reason-grid b {
    color: #a3c9fb;
    font-size: 13px;
}

.reason-grid h3 {
    margin: 43px 0 10px;
    font-size: 21px;
}

.reason-grid p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.7;
}

.final-cta {
    padding: 0 24px 92px;
    background: #fff;
}

.final-cta-inner {
    width: min(1180px, 100%);
    min-height: 240px;
    margin: 0 auto;
    padding: 48px 58px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 26px;
    overflow: hidden;
    color: #fff;
    background:
        radial-gradient(circle at 85% 20%, rgba(67, 167, 255, .45), transparent 26%),
        linear-gradient(135deg, #07111f, #0a2853);
    border-radius: 28px;
}

.final-cta-inner > img {
    width: 68px;
    height: 68px;
    object-fit: contain;
}

.final-cta p {
    margin: 0 0 7px;
    color: #76b5ff;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .1em;
}

.final-cta h2 {
    margin: 0 0 12px;
    font-size: clamp(27px, 3vw, 39px);
}

.final-cta span {
    color: rgba(255, 255, 255, .55);
    font-size: 13px;
}

.back-download {
    padding: 15px 29px;
    color: #fff;
    background: var(--blue);
    border-radius: 24px;
    font-weight: 700;
    transition: transform .2s ease, background .2s ease;
}

.back-download:hover {
    transform: translateY(-2px);
    background: #4a98ff;
}

.site-footer {
    color: rgba(255, 255, 255, .55);
    background: #05090f;
    border-top: 1px solid rgba(255, 255, 255, .07);
}

.footer-inner {
    width: min(1180px, calc(100% - 48px));
    min-height: 122px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
}

.footer-brand img {
    width: 32px;
}

.company-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px 20px;
    font-size: 12px;
}

.reveal {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity .65s ease, transform .65s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition: none !important;
    }
}

@media (max-width: 920px) {
    .hero {
        min-height: auto;
        padding-bottom: 0;
    }

    .hero-points {
        flex-wrap: wrap;
        gap: 12px 20px;
    }

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

    .feature-card-large {
        grid-row: auto;
        min-height: 240px;
    }

    .feature-card-large .feature-icon {
        width: 50px;
        height: 50px;
        margin-bottom: 34px;
        border-radius: 15px;
        font-size: 22px;
    }

    .showcase,
    .showcase-home,
    .showcase-last {
        grid-template-columns: 1fr;
    }

    .showcase-home .shot-card,
    .showcase-last .shot-card {
        order: -1;
    }

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

    .reason-grid article:nth-child(2) {
        border-right: 0;
    }

    .reason-grid article:nth-child(-n+2) {
        border-bottom: 1px solid var(--line);
    }
}

@media (max-width: 680px) {
    .site-header {
        height: 66px;
    }

    .nav-wrap {
        width: calc(100% - 30px);
    }

    .brand {
        font-size: 16px;
    }

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

    .nav-links {
        gap: 0;
    }

    .nav-links > a:not(.nav-download) {
        display: none;
    }

    .nav-links .nav-download {
        padding: 8px 15px;
    }

    .hero {
        padding: 110px 16px 0;
    }

    .hero h1 {
        font-size: 39px;
    }

    .hero-copy {
        font-size: 16px;
    }

    .hero-points {
        display: grid;
        justify-content: center;
        text-align: left;
    }

    .product-stage {
        width: 100%;
        padding: 7px 7px 0;
        border-radius: 14px 14px 0 0;
    }

    .stage-topbar {
        display: none;
    }

    .product-stage img {
        border-radius: 8px 8px 0 0;
    }

    .section {
        padding: 76px 16px;
    }

    .section-heading {
        margin-bottom: 34px;
    }

    .section-heading h2 {
        font-size: 31px;
    }

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

    .feature-card,
    .feature-card-large {
        min-height: 218px;
        padding: 27px;
    }

    .showcase {
        padding: 13px;
        gap: 22px;
        border-radius: 19px;
    }

    .showcase-copy {
        padding: 12px 10px 20px;
    }

    .showcase-copy h3 {
        font-size: 24px;
    }

    .shot-card {
        padding: 5px;
        border-radius: 12px;
    }

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

    .reason-grid article,
    .reason-grid article:nth-child(2) {
        min-height: 168px;
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .reason-grid article:last-child {
        border-bottom: 0;
    }

    .reason-grid h3 {
        margin-top: 26px;
    }

    .final-cta {
        padding: 0 16px 65px;
    }

    .final-cta-inner {
        padding: 38px 26px;
        grid-template-columns: 1fr;
        text-align: center;
    }

    .final-cta-inner > img {
        margin: 0 auto;
    }

    .back-download {
        justify-self: center;
    }

    .footer-inner {
        width: calc(100% - 32px);
        padding: 30px 0;
        flex-direction: column;
        align-items: flex-start;
    }

    .company-info {
        justify-content: flex-start;
    }
}