* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: #142033;
    background: linear-gradient(180deg, #f5f9ff 0%, #ffffff 38%, #f7fbff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}

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

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

.container {
    width: min(100% - 32px, 1160px);
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(70, 139, 223, 0.12);
}

.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;
    color: #17314f;
    letter-spacing: -0.02em;
}

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

.brand-text {
    white-space: nowrap;
}

.nav-toggle {
    width: 42px;
    height: 42px;
    border: 1px solid rgba(70, 139, 223, 0.18);
    border-radius: 14px;
    background: #ffffff;
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 18px;
    height: 2px;
    background: rgb(70,139,223);
    border-radius: 2px;
}

.site-nav {
    position: absolute;
    top: 68px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    gap: 8px;
    padding: 14px;
    border-radius: 20px;
    background: #ffffff;
    box-shadow: 0 18px 42px rgba(24, 74, 126, 0.12);
    border: 1px solid rgba(70, 139, 223, 0.12);
}

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

.site-nav a {
    padding: 11px 12px;
    border-radius: 14px;
    color: #42526b;
    font-size: 15px;
}

.site-nav a:hover,
.site-nav a.active {
    color: rgb(70,139,223);
    background: rgba(70, 139, 223, 0.09);
}

.hero,
.page-hero {
    position: relative;
    padding: 54px 0 38px;
    overflow: hidden;
}

.hero::before,
.page-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at top left, rgba(70,139,223,0.20), transparent 38%),
        radial-gradient(circle at 85% 10%, rgba(105,173,255,0.18), transparent 28%);
    pointer-events: none;
}

.hero-grid,
.page-hero-inner {
    position: relative;
    z-index: 1;
}

.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;
    color: rgb(70,139,223);
    background: rgba(70, 139, 223, 0.10);
    font-weight: 700;
    font-size: 13px;
}

h1,
h2,
h3 {
    margin: 0;
    color: #12233a;
    line-height: 1.2;
    letter-spacing: -0.03em;
}

h1 {
    font-size: clamp(32px, 9vw, 58px);
    margin-top: 16px;
    margin-bottom: 18px;
}

h2 {
    font-size: clamp(25px, 6vw, 38px);
    margin-bottom: 14px;
}

h3 {
    font-size: 19px;
    margin-bottom: 8px;
}

p {
    margin: 0 0 14px;
    color: #516174;
}

.lead {
    font-size: 17px;
    color: #40516a;
    max-width: 720px;
}

.hero-actions,
.download-panel {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
    margin-top: 22px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    background: rgb(70,139,223);
    color: #ffffff;
    font-weight: 800;
    box-shadow: 0 12px 28px rgba(70, 139, 223, 0.28);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.microcopy {
    font-size: 13px;
    color: #6a7a90;
}

.trust-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 22px;
}

.trust-tags span {
    display: inline-flex;
    padding: 8px 12px;
    border-radius: 999px;
    background: #ffffff;
    color: #344862;
    box-shadow: 0 8px 24px rgba(33, 76, 119, 0.08);
    border: 1px solid rgba(70,139,223,0.10);
    font-size: 14px;
}

.product-card {
    position: relative;
    padding: 18px;
    border-radius: 30px;
    background: linear-gradient(145deg, #ffffff, #eef6ff);
    box-shadow: 0 24px 60px rgba(30, 78, 126, 0.14);
    border: 1px solid rgba(70,139,223,0.12);
}

.product-card img {
    width: min(100%, 430px);
    margin: 0 auto;
    border-radius: 28px;
}

.stat-strip {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 18px;
}

.stat-item {
    padding: 15px;
    border-radius: 20px;
    background: rgba(255,255,255,0.82);
    border: 1px solid rgba(70,139,223,0.12);
}

.stat-item strong {
    display: block;
    font-size: 22px;
    color: rgb(70,139,223);
}

.section {
    padding: 48px 0;
}

.section-heading {
    max-width: 760px;
    margin-bottom: 24px;
}

.card-grid,
.feature-grid,
.two-col,
.steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.card,
.info-card,
.faq-item,
.step-card,
.notice-card {
    background: rgba(255,255,255,0.92);
    border: 1px solid rgba(70,139,223,0.12);
    border-radius: 22px;
    padding: 20px;
    box-shadow: 0 14px 38px rgba(35, 80, 126, 0.08);
}

.card.blue,
.notice-card {
    background: linear-gradient(145deg, rgba(70,139,223,0.10), rgba(255,255,255,0.95));
}

.icon {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(70,139,223,0.12);
    color: rgb(70,139,223);
    font-weight: 900;
    margin-bottom: 12px;
}

.list {
    margin: 0;
    padding-left: 18px;
    color: #516174;
}

.list li {
    margin: 7px 0;
}

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

.faq-item h3 {
    font-size: 17px;
}

.cta-band {
    border-radius: 28px;
    padding: 28px;
    background:
        linear-gradient(135deg, rgba(70,139,223,0.95), rgba(105,173,255,0.90)),
        #468bdf;
    color: #ffffff;
    overflow: hidden;
    position: relative;
}

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

.cta-band p {
    opacity: 0.92;
}

.cta-band .download-btn {
    background: #ffffff;
    color: rgb(70,139,223);
    box-shadow: 0 12px 24px rgba(21, 67, 116, 0.18);
}

.page-hero {
    padding-bottom: 26px;
}

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

.breadcrumb {
    color: rgb(70,139,223);
    font-weight: 700;
    font-size: 13px;
    margin-bottom: 10px;
}

.content-block {
    max-width: 880px;
}

.download-area {
    margin-top: 22px;
    padding: 18px;
    border-radius: 22px;
    background: rgba(70,139,223,0.08);
    border: 1px solid rgba(70,139,223,0.14);
}

.step-number {
    width: 34px;
    height: 34px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgb(70,139,223);
    color: #ffffff;
    font-weight: 800;
    margin-bottom: 12px;
}

.site-footer {
    margin-top: 38px;
    background: #10243b;
    color: #dce9f8;
    padding: 36px 0 20px;
}

.site-footer p,
.site-footer a,
.footer-bottom {
    color: #c4d3e5;
}

.footer-grid {
    display: grid;
    gap: 24px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.footer-brand img {
    width: 36px;
    height: 36px;
    border-radius: 12px;
}

.site-footer h3 {
    color: #ffffff;
    font-size: 16px;
    margin-bottom: 12px;
}

.site-footer a {
    display: block;
    margin: 8px 0;
    font-size: 14px;
}

.footer-bottom {
    margin-top: 26px;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,0.12);
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 13px;
}

@media (min-width: 640px) {
    .container {
        width: min(100% - 48px, 1160px);
    }

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

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

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

@media (min-width: 900px) {
    .nav-toggle {
        display: none;
    }

    .site-nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        padding: 0;
        box-shadow: none;
        border: 0;
        background: transparent;
        gap: 4px;
    }

    .site-nav a {
        padding: 9px 12px;
    }

    .hero {
        padding: 78px 0 64px;
    }

    .hero-grid {
        grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
        gap: 44px;
    }

    .page-hero {
        padding: 70px 0 34px;
    }

    .section {
        padding: 64px 0;
    }

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

    .two-col {
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }

    .steps-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .footer-grid {
        grid-template-columns: 1.4fr 0.8fr 0.8fr;
    }

    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

@media (min-width: 1180px) {
    h1 {
        font-size: 60px;
    }

    .product-card {
        padding: 24px;
    }
}