:root {
    --brand: #ff6a2a;
    --brand2: #ff8b3d;
    --ink: #172033;
    --muted: #667085;
    --line: #e8edf5;
    --bg: #f7f9fc;
    --blue: #2f7cf6;
    --green: #16b77a;
    --shadow: 0 18px 60px rgba(28,40,70,.10);
    --radius: 24px
}

* {
    box-sizing: border-box
}

html {
    scroll-behavior: smooth
}

body {
    margin: 0;
    font-family: Inter,"PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
    color: var(--ink);
    background: #fff;
    line-height: 1.72
}

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

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

.container {
    width: min(1180px,calc(100% - 40px));
    margin: auto
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(232,237,245,.9)
}

.nav {
    height: 74px;
    display: flex;
    align-items: center;
    gap: 24px
}

.brand img {
    width: 220px;
    height: auto
}

.navlinks {
    display: flex;
    gap: 22px;
    margin-left: auto;
    font-size: 15px
}

.navlinks a {
    color: #48536a
}

.navlinks a:hover {
    color: var(--brand)
}

.nav-cta,.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: linear-gradient(135deg,var(--brand),var(--brand2));
    color: white;
    padding: 12px 20px;
    border-radius: 14px;
    font-weight: 700;
    box-shadow: 0 10px 26px rgba(255,106,42,.26)
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 11px 18px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #fff;
    font-weight: 650
}

.hero {
    padding: 46px 0 24px;
    background: radial-gradient(circle at 20% 20%,#fff0e8 0,transparent 32%),radial-gradient(circle at 88% 20%,#eaf3ff 0,transparent 30%),linear-gradient(#fff,#f9fbff)
}

.hero-grid {
    display: grid;
    grid-template-columns: .88fr 1.12fr;
    gap: 34px;
    align-items: center
}

.eyebrow {
    display: inline-flex;
    padding: 7px 12px;
    border-radius: 999px;
    background: #fff2eb;
    color: #d94e0e;
    font-weight: 700;
    font-size: 13px
}

.hero h1 {
    font-size: clamp(48px,6vw,78px);
    line-height: 1.03;
    margin: 16px 0 18px;
    letter-spacing: -2px
}

.hero p {
    font-size: 18px;
    color: var(--muted);
    margin: 0 0 24px
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap
}

.trustline {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
    margin-top: 23px;
    color: #5c667a;
    font-size: 13px
}

.hero-media {
    position: relative;
    border-radius: 30px;
    overflow: hidden;
    box-shadow: var(--shadow);
    background: #eef4fb
}

.hero-media img {
    aspect-ratio: 16/10;
    object-fit: cover
}

.floating {
    position: absolute;
    left: 22px;
    bottom: 20px;
    background: rgba(255,255,255,.9);
    backdrop-filter: blur(12px);
    padding: 12px 15px;
    border-radius: 14px;
    font-size: 13px;
    box-shadow: 0 10px 30px rgba(25,38,70,.12)
}

section {
    padding: 74px 0
}

.section-head {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 28px
}

.section-head h2 {
    font-size: 36px;
    line-height: 1.2;
    margin: 0
}

.section-head p {
    max-width: 670px;
    color: var(--muted);
    margin: 0
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 18px
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 20px
}

.card {
    border: 1px solid var(--line);
    background: white;
    border-radius: 22px;
    padding: 24px;
    box-shadow: 0 8px 30px rgba(24,35,65,.04)
}

.card h3 {
    margin: 12px 0 8px;
    font-size: 20px
}

.card p {
    margin: 0;
    color: var(--muted)
}

.icon {
    width: 48px;
    height: 48px;
    border-radius: 15px;
    display: grid;
    place-items: center;
    font-size: 24px;
    background: #fff0e9
}

.soft {
    background: var(--bg)
}

.download-card {
    position: relative;
    overflow: hidden
}

.download-card .os {
    font-weight: 800;
    font-size: 24px
}

.tag {
    display: inline-flex;
    background: #eef5ff;
    color: #326dcf;
    padding: 5px 10px;
    border-radius: 999px;
    font-size: 12px
}

.download-card .meta {
    font-size: 13px;
    color: var(--muted);
    margin: 12px 0 18px
}

.wide-feature {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: center
}

.wide-feature img {
    border-radius: 24px;
    box-shadow: var(--shadow)
}

.checklist {
    display: grid;
    gap: 12px;
    margin-top: 20px
}

.check {
    display: flex;
    gap: 10px;
    color: #4d5870
}

.check::before {
    content: '✓';
    color: var(--green);
    font-weight: 900
}

.article-card img {
    border-radius: 16px;
    aspect-ratio: 16/9;
    object-fit: cover;
    border: 1px solid var(--line)
}

.article-card h3 {
    font-size: 18px
}

.article-card .meta {
    font-size: 12px;
    color: #8590a5
}

.notice {
    padding: 16px 18px;
    border-radius: 16px;
    background: #fff8f3;
    border: 1px solid #ffe3d1;
    color: #78432b
}

.faq {
    display: grid;
    gap: 12px
}

.faq details {
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 16px 18px;
    background: #fff
}

.faq summary {
    font-weight: 700;
    cursor: pointer
}

.footer {
    background: #111827;
    color: #d7deea;
    padding: 54px 0 24px
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr repeat(3,1fr);
    gap: 30px
}

.footer .brand img {
    filter: brightness(0) invert(1);
    opacity: .92
}

.footer h4 {
    color: white;
    margin: 0 0 12px
}

.footer a {
    display: block;
    color: #abb6c8;
    margin: 8px 0
}

.copyright {
    border-top: 1px solid #263247;
    margin-top: 34px;
    padding-top: 18px;
    color: #8c9ab0;
    font-size: 13px
}

.article-hero {
    padding: 54px 0;
    background: linear-gradient(180deg,#fff9f5,#fff)
}

.breadcrumbs {
    font-size: 13px;
    color: #8a94a6;
    margin-bottom: 18px
}

.article-hero h1 {
    font-size: clamp(36px,5vw,60px);
    line-height: 1.15;
    margin: 0 0 18px
}

.article-intro {
    font-size: 18px;
    color: #5d6778;
    max-width: 860px
}

.article-meta {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    color: #8690a2;
    font-size: 13px;
    margin-top: 18px
}

.article-layout {
    display: grid;
    grid-template-columns: minmax(0,1fr) 300px;
    gap: 34px;
    align-items: start
}

.article-body {
    font-size: 17px
}

.article-body>img {
    border-radius: 22px;
    margin: 10px 0 28px;
    border: 1px solid var(--line)
}

.article-body h2 {
    font-size: 29px;
    margin: 38px 0 14px
}

.article-body h3 {
    font-size: 21px;
    margin: 26px 0 10px
}

.article-body p {
    margin: 0 0 18px;
    color: #394457
}

.article-body ol,.article-body ul {
    padding-left: 24px
}

.article-body li {
    margin: 8px 0
}

.tip {
    background: #f3f7ff;
    border: 1px solid #dfeaff;
    border-radius: 16px;
    padding: 16px 18px;
    margin: 18px 0
}

.sidebar {
    position: sticky;
    top: 94px
}

.toc {
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 20px;
    background: #fff
}

.toc h3 {
    margin-top: 0
}

.toc a {
    display: block;
    color: #60708b;
    font-size: 14px;
    margin: 9px 0
}

.toc a:hover {
    color: var(--brand)
}

.related {
    margin-top: 20px
}

.related a {
    display: block;
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
    font-size: 14px
}

.platform {
    font-size: 12px;
    color: #7a8496
}

.carousel {
    position: relative;
    overflow: hidden;
    border-radius: 28px
}

.slides {
    display: flex;
    transition: transform .55s ease
}

.slide {
    min-width: 100%;
    position: relative
}

.slide img {
    width: 100%;
    aspect-ratio: 16/8.2;
    object-fit: cover
}

.slide-caption {
    position: absolute;
    left: 28px;
    bottom: 24px;
    background: rgba(18,28,45,.70);
    color: #fff;
    padding: 14px 18px;
    border-radius: 14px;
    backdrop-filter: blur(10px)
}

.dots {
    position: absolute;
    right: 22px;
    bottom: 22px;
    display: flex;
    gap: 7px
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,.55)
}

.dot.active {
    width: 24px;
    border-radius: 99px;
    background: white
}

@media(max-width:900px) {
    .navlinks {
        display: none
    }
    .hero-grid,.wide-feature,.article-layout,.footer-grid {
        grid-template-columns: 1fr
    }
    .grid-4 {
        grid-template-columns: repeat(2,1fr)
    }
    .grid-3 {
        grid-template-columns: 1fr 1fr
    }
    .sidebar {
        position: static
    }
    .hero h1 {
        font-size: 52px
    }
    .site-header .nav-cta {
        margin-left: auto
    }
}

@media(max-width:620px) {
    .container {
        width: min(100% - 24px,1180px)
    }
    .grid-4,.grid-3 {
        grid-template-columns: 1fr
    }
    .hero {
        padding-top: 30px
    }
    .hero h1 {
        font-size: 44px
    }
    .section-head {
        display: block
    }
    .section-head p {
        margin-top: 12px
    }
    .brand img {
        width: 184px
    }
    .nav {
        height: 66px
    }
    .slide-caption {
        left: 14px;
        right: 14px;
        bottom: 14px;
        font-size: 13px
    }
    .dots {
        display: none
    }
}