* {
    box-sizing: border-box;
}

:root {
    --primary: rgb(70,139,223);
    --primary-dark: #1f5fae;
    --primary-soft: #eaf4ff;
    --text: #142235;
    --muted: #5d6b80;
    --line: #dce9f8;
    --card: #ffffff;
    --bg: #f6fbff;
    --shadow: 0 18px 50px rgba(42, 101, 171, 0.10);
    --radius: 22px;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(70,139,223,0.16), transparent 34rem),
        linear-gradient(180deg, #f4faff 0%, #ffffff 45%, #f7fbff 100%);
    line-height: 1.72;
    overflow-x: hidden;
}

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

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

.container {
    width: min(100% - 32px, 1180px);
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.86);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(220, 233, 248, 0.88);
}

.nav-wrap {
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #102946;
}

.brand-logo {
    width: 38px;
    height: 38px;
    border-radius: 12px;
}

.brand-text {
    font-size: 1.05rem;
    white-space: nowrap;
}

.nav-toggle {
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #fff;
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 18px;
    height: 2px;
    border-radius: 99px;
    background: var(--primary-dark);
}

.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 76px;
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 14px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.site-nav.open {
    display: flex;
}

.site-nav a {
    padding: 12px 14px;
    border-radius: 14px;
    color: #33465f;
    font-weight: 650;
}

.site-nav a.active,
.site-nav a:hover {
    background: var(--primary-soft);
    color: var(--primary-dark);
}

.hero {
    padding: 52px 0 34px;
}

.hero-grid {
    display: grid;
    gap: 28px;
    align-items: center;
}

.eyebrow,
.badge {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    gap: 8px;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(70,139,223,0.11);
    color: var(--primary-dark);
    font-size: 0.86rem;
    font-weight: 750;
}

h1,
h2,
h3 {
    margin: 0;
    line-height: 1.24;
    letter-spacing: -0.03em;
}

h1 {
    margin-top: 16px;
    font-size: clamp(2.1rem, 8vw, 4.9rem);
}

h2 {
    font-size: clamp(1.55rem, 5vw, 2.45rem);
}

h3 {
    font-size: 1.18rem;
}

.lead {
    margin: 18px 0 0;
    font-size: 1.08rem;
    color: var(--muted);
}

.hero-actions {
    margin-top: 26px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    align-items: flex-start;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 12px 28px rgba(70, 139, 223, 0.28);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.download-btn:hover {
    transform: translateY(-2px);
    background: #3e82da;
    box-shadow: 0 16px 34px rgba(70, 139, 223, 0.34);
}

.micro-copy {
    color: var(--muted);
    font-size: 0.95rem;
}

.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.tag-row span {
    padding: 8px 12px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--line);
    color: #2b4a69;
    font-size: 0.92rem;
    box-shadow: 0 8px 20px rgba(70,139,223,0.06);
}

.hero-visual {
    position: relative;
    padding: 22px;
    border-radius: 32px;
    background:
        linear-gradient(145deg, rgba(255,255,255,0.98), rgba(232,244,255,0.9));
    border: 1px solid rgba(210, 230, 250, 0.9);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.hero-visual:before {
    content: "";
    position: absolute;
    inset: auto -40px -60px auto;
    width: 170px;
    height: 170px;
    border-radius: 50%;
    background: rgba(70,139,223,0.16);
}

.app-shot {
    position: relative;
    width: min(100%, 440px);
    margin: 0 auto;
    filter: drop-shadow(0 22px 34px rgba(28, 80, 138, .18));
}

.floating-card {
    position: relative;
    margin-top: -20px;
    padding: 16px;
    border-radius: 20px;
    background: rgba(255,255,255,0.92);
    border: 1px solid var(--line);
    box-shadow: 0 16px 38px rgba(42, 101, 171, 0.10);
}

.stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 20px;
}

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

.stat strong {
    display: block;
    color: var(--primary-dark);
    font-size: 1.32rem;
}

.section {
    padding: 46px 0;
}

.section-head {
    display: grid;
    gap: 12px;
    margin-bottom: 22px;
}

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

.grid {
    display: grid;
    gap: 16px;
}

.feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.card {
    padding: 22px;
    border-radius: var(--radius);
    background: var(--card);
    border: 1px solid rgba(220, 233, 248, 0.92);
    box-shadow: var(--shadow);
}

.card.soft {
    background: linear-gradient(145deg, #ffffff, #f0f7ff);
}

.card p {
    margin: 12px 0 0;
    color: var(--muted);
}

.icon {
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: var(--primary-soft);
    color: var(--primary-dark);
    font-weight: 900;
    margin-bottom: 14px;
}

.split {
    display: grid;
    gap: 18px;
    align-items: center;
}

.panel {
    padding: 24px;
    border-radius: 28px;
    background: linear-gradient(145deg, rgba(255,255,255,0.95), rgba(235,246,255,0.95));
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.list {
    display: grid;
    gap: 12px;
    padding: 0;
    margin: 18px 0 0;
    list-style: none;
}

.list li {
    padding: 14px 16px;
    border-radius: 16px;
    background: #fff;
    border: 1px solid var(--line);
    color: #344a61;
}

.steps {
    counter-reset: step;
    display: grid;
    gap: 14px;
    padding: 0;
    margin: 0;
    list-style: none;
}

.steps li {
    counter-increment: step;
    position: relative;
    padding: 18px 18px 18px 58px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid var(--line);
}

.steps li:before {
    content: counter(step);
    position: absolute;
    left: 16px;
    top: 18px;
    width: 28px;
    height: 28px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: var(--primary);
    font-weight: 800;
}

.faq-list {
    display: grid;
    gap: 14px;
}

.faq-item {
    padding: 20px;
    border-radius: 20px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: 0 12px 32px rgba(42, 101, 171, 0.06);
}

.faq-item h3 {
    font-size: 1.04rem;
}

.faq-item p {
    margin: 10px 0 0;
    color: var(--muted);
}

.cta-band {
    padding: 26px;
    border-radius: 30px;
    background:
        linear-gradient(135deg, rgba(70,139,223,0.13), rgba(255,255,255,0.92)),
        #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.cta-band p {
    color: var(--muted);
}

.page-hero {
    padding: 50px 0 24px;
}

.page-hero .lead {
    max-width: 820px;
}

.article {
    display: grid;
    gap: 18px;
    padding-bottom: 54px;
}

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

.notice {
    padding: 18px;
    border-radius: 20px;
    background: #f0f7ff;
    border: 1px solid #d9ebff;
    color: #294a6e;
}

.download-panel {
    display: grid;
    gap: 16px;
    align-items: center;
    padding: 24px;
    border-radius: 28px;
    background: linear-gradient(145deg, #ffffff, #eef7ff);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.site-footer {
    padding: 42px 0 22px;
    background: #102946;
    color: rgba(255,255,255,0.78);
}

.footer-grid {
    display: grid;
    gap: 22px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    font-weight: 800;
    margin-bottom: 12px;
}

.footer-brand img {
    width: 34px;
    height: 34px;
    border-radius: 10px;
}

.site-footer h3 {
    color: #fff;
    font-size: 1rem;
    margin-bottom: 12px;
}

.site-footer a {
    display: block;
    margin: 8px 0;
    color: rgba(255,255,255,0.72);
}

.site-footer a:hover {
    color: #fff;
}

.footer-bottom {
    margin-top: 28px;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,0.16);
    display: grid;
    gap: 8px;
    font-size: 0.92rem;
}

.footer-bottom p {
    margin: 0;
}

@media (min-width: 720px) {
    .container {
        width: min(100% - 48px, 1180px);
    }

    .hero {
        padding-top: 72px;
    }

    .hero-actions {
        flex-direction: row;
        align-items: center;
    }

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

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

    .download-panel {
        grid-template-columns: 1fr auto;
    }

    .footer-grid {
        grid-template-columns: 1.4fr 1fr 1fr 1fr;
    }

    .footer-bottom {
        grid-template-columns: 1fr auto;
    }
}

@media (min-width: 980px) {
    .nav-toggle {
        display: none;
    }

    .site-nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        padding: 0;
        background: transparent;
        border: 0;
        box-shadow: none;
    }

    .site-nav a {
        padding: 9px 12px;
        font-size: 0.96rem;
    }

    .hero-grid {
        grid-template-columns: minmax(0, 1.06fr) minmax(360px, 0.94fr);
        gap: 44px;
    }

    .section {
        padding: 62px 0;
    }

    .section-head {
        grid-template-columns: 0.9fr 1.1fr;
        align-items: end;
    }

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

    .split {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
    }

    .page-hero {
        padding-top: 72px;
    }
}

@media (max-width: 380px) {
    .container {
        width: min(100% - 24px, 1180px);
    }

    .download-btn {
        width: 100%;
    }

    .brand-text {
        font-size: 0.98rem;
    }
}