:root {
    --primary: rgb(70,139,223);
    --primary-dark: rgb(38, 86, 150);
    --primary-soft: rgba(70,139,223,0.12);
    --primary-soft-2: rgba(70,139,223,0.08);
    --text: #17304d;
    --muted: #64748b;
    --line: rgba(42, 99, 170, 0.12);
    --white: #ffffff;
    --bg: #f6fbff;
    --shadow: 0 16px 40px rgba(22, 68, 126, 0.10);
    --radius: 22px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.72;
    background:
        radial-gradient(circle at 18% 0%, rgba(70,139,223,0.16), transparent 32%),
        linear-gradient(180deg, #eef7ff 0%, #ffffff 38%, #f7fbff 100%);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

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

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    padding: 12px 14px 8px;
    background: rgba(246,251,255,0.88);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(70,139,223,0.08);
}

.header-inner {
    max-width: 520px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--primary-dark);
    white-space: nowrap;
}

.logo {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    box-shadow: 0 8px 20px rgba(70,139,223,0.20);
}

.top-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px;
    border-radius: 999px;
    background: rgba(255,255,255,0.76);
    border: 1px solid var(--line);
}

.top-nav a {
    padding: 6px 8px;
    border-radius: 999px;
    font-size: 12px;
    color: #34536f;
}

.top-nav a:active {
    background: var(--primary-soft);
}

.page-shell {
    max-width: 520px;
    margin: 0 auto;
    padding: 16px 14px 26px;
}

.hero {
    position: relative;
    overflow: hidden;
    padding: 22px 18px;
    border-radius: 28px;
    background:
        linear-gradient(138deg, rgba(255,255,255,0.96) 0%, rgba(235,246,255,0.96) 52%, rgba(222,239,255,0.94) 100%);
    border: 1px solid rgba(70,139,223,0.16);
    box-shadow: var(--shadow);
}

.hero::after {
    content: "";
    position: absolute;
    right: -48px;
    top: 38px;
    width: 160px;
    height: 160px;
    border-radius: 999px;
    background: rgba(70,139,223,0.11);
    filter: blur(2px);
}

.hero-content,
.hero-visual {
    position: relative;
    z-index: 1;
}

.eyebrow,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 10px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary-dark);
    font-size: 12px;
    font-weight: 700;
}

h1,
h2,
h3 {
    margin: 0;
    letter-spacing: -0.035em;
    line-height: 1.25;
}

h1 {
    margin-top: 12px;
    font-size: 32px;
    color: #102a43;
}

h2 {
    font-size: 23px;
    color: #14375f;
}

h3 {
    font-size: 17px;
    color: #173b63;
}

.lead {
    margin: 12px 0 0;
    color: #45627f;
    font-size: 15px;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 18px;
}

.download-btn,
.btn-download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 22px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-size: 15px;
    font-weight: 800;
    box-shadow: 0 14px 28px rgba(70,139,223,0.28);
    border: 0;
    white-space: nowrap;
}

.download-btn:active,
.btn-download:active {
    transform: translateY(1px);
    box-shadow: 0 8px 18px rgba(70,139,223,0.22);
}

.link-pill {
    font-size: 13px;
    color: var(--primary-dark);
    font-weight: 700;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.hero-tags span {
    padding: 7px 10px;
    border-radius: 999px;
    background: rgba(255,255,255,0.72);
    color: #355574;
    font-size: 12px;
    border: 1px solid rgba(70,139,223,0.14);
}

.hero-visual {
    margin-top: 20px;
    display: grid;
    grid-template-columns: 1fr;
    place-items: center;
}

.app-shot {
    width: 74%;
    max-width: 270px;
    filter: drop-shadow(0 24px 36px rgba(31, 89, 155, 0.22));
}

.float-card {
    width: 100%;
    margin-top: -12px;
    padding: 14px;
    border-radius: 20px;
    background: rgba(255,255,255,0.9);
    border: 1px solid rgba(70,139,223,0.12);
    box-shadow: 0 12px 26px rgba(22,68,126,0.08);
}

.float-card strong {
    display: block;
    font-size: 14px;
    color: #16375d;
}

.float-card p {
    margin: 4px 0 0;
    font-size: 12px;
    color: var(--muted);
}

.section {
    margin-top: 18px;
    padding: 20px 16px;
    border-radius: var(--radius);
    background: rgba(255,255,255,0.88);
    border: 1px solid var(--line);
    box-shadow: 0 10px 28px rgba(22,68,126,0.06);
}

.section.soft {
    background: linear-gradient(180deg, rgba(238,247,255,0.82), rgba(255,255,255,0.94));
}

.section p {
    margin: 10px 0 0;
    color: #4b647f;
    font-size: 14px;
}

.section-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 12px;
}

.card-grid,
.feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 14px;
}

.card,
.feature-card,
.info-card,
.step-card,
.faq-item {
    padding: 15px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid rgba(70,139,223,0.12);
    box-shadow: 0 10px 24px rgba(22,68,126,0.05);
}

.card.blue,
.feature-card.blue,
.info-card.blue {
    background: linear-gradient(180deg, rgba(236,246,255,0.92), rgba(255,255,255,0.94));
}

.card p,
.feature-card p,
.info-card p,
.step-card p,
.faq-item p {
    margin: 7px 0 0;
    font-size: 13px;
    color: #526b85;
}

.metric-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 9px;
    margin-top: 14px;
}

.metric {
    padding: 12px 8px;
    border-radius: 16px;
    text-align: center;
    background: var(--primary-soft-2);
    border: 1px solid rgba(70,139,223,0.10);
}

.metric strong {
    display: block;
    color: var(--primary-dark);
    font-size: 17px;
}

.metric span {
    display: block;
    margin-top: 2px;
    font-size: 11px;
    color: #60758a;
}

.page-hero {
    padding: 23px 18px;
    border-radius: 28px;
    background: linear-gradient(145deg, #ffffff 0%, #edf7ff 100%);
    border: 1px solid rgba(70,139,223,0.15);
    box-shadow: var(--shadow);
}

.page-hero h1 {
    font-size: 29px;
}

.page-hero .download-btn,
.page-hero .btn-download {
    margin-top: 16px;
}

.steps {
    display: grid;
    gap: 11px;
    margin-top: 14px;
}

.step-card {
    display: grid;
    grid-template-columns: 34px 1fr;
    gap: 12px;
    align-items: flex-start;
}

.step-num {
    width: 34px;
    height: 34px;
    border-radius: 12px;
    display: inline-grid;
    place-items: center;
    background: var(--primary);
    color: #fff;
    font-weight: 900;
    box-shadow: 0 10px 20px rgba(70,139,223,0.22);
}

.notice {
    margin-top: 14px;
    padding: 14px;
    border-radius: 18px;
    background: rgba(70,139,223,0.09);
    border: 1px solid rgba(70,139,223,0.14);
    color: #34536f;
    font-size: 13px;
}

.check-list {
    margin: 12px 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 8px;
}

.check-list li {
    position: relative;
    padding-left: 22px;
    color: #4b647f;
    font-size: 14px;
}

.check-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 4px rgba(70,139,223,0.12);
}

.faq-list {
    display: grid;
    gap: 12px;
    margin-top: 14px;
}

.faq-item h3 {
    font-size: 16px;
}

.cta-band {
    margin-top: 18px;
    padding: 20px 16px;
    border-radius: 24px;
    background: linear-gradient(135deg, var(--primary), rgb(98, 164, 237));
    color: #fff;
    box-shadow: 0 16px 34px rgba(70,139,223,0.24);
}

.cta-band h2,
.cta-band p {
    color: #fff;
}

.cta-band p {
    opacity: 0.92;
}

.cta-band .download-btn,
.cta-band .btn-download {
    margin-top: 14px;
    background: #fff;
    color: var(--primary-dark);
    box-shadow: 0 12px 24px rgba(22,68,126,0.13);
}

.site-footer {
    max-width: 520px;
    margin: 0 auto;
    padding: 0 14px 24px;
}

.footer-card {
    border-radius: 24px;
    padding: 18px;
    background: rgba(255,255,255,0.82);
    border: 1px solid var(--line);
    color: #516a84;
}

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

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

.footer-brand strong {
    color: #17375c;
}

.footer-brand p,
.footer-note {
    margin: 3px 0 0;
    font-size: 12px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 14px 0;
}

.footer-links a {
    font-size: 12px;
    padding: 6px 9px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary-dark);
    font-weight: 700;
}

.desktop-gate {
    display: none;
}

.is-desktop .desktop-gate {
    display: grid;
    position: fixed;
    inset: 0;
    z-index: 999;
    place-items: center;
    padding: 24px;
    background: rgba(246,251,255,0.86);
    backdrop-filter: blur(18px);
}

.desktop-gate-card {
    width: min(420px, 92vw);
    padding: 30px;
    border-radius: 28px;
    text-align: center;
    background: #fff;
    border: 1px solid rgba(70,139,223,0.16);
    box-shadow: var(--shadow);
}

.desktop-gate-logo {
    width: 58px;
    height: 58px;
    margin: 0 auto 12px;
    border-radius: 18px;
}

.desktop-gate h1 {
    margin-top: 0;
    font-size: 26px;
}

.desktop-gate p {
    color: #58708a;
    margin: 10px 0 0;
}

.is-desktop .download-btn,
.is-desktop .btn-download {
    display: none !important;
}

@media (min-width: 521px) {
    .page-shell,
    .site-footer,
    .header-inner {
        max-width: 520px;
    }
}