* {
    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: #14213d;
    background: linear-gradient(180deg, #f4f9ff 0%, #ffffff 42%, #f7fbff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}

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

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

.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(16px);
    border-bottom: 1px solid rgba(70, 139, 223, 0.14);
}

.header-inner {
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.brand,
.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #102a51;
}

.logo {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    box-shadow: 0 10px 24px rgba(70, 139, 223, 0.22);
}

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

.nav-toggle {
    width: 44px;
    height: 44px;
    border: 1px solid rgba(70, 139, 223, 0.24);
    background: #ffffff;
    border-radius: 14px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 20px;
    height: 2px;
    background: rgb(70,139,223);
    border-radius: 999px;
}

.site-nav {
    position: absolute;
    top: 68px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 12px;
    background: #ffffff;
    border: 1px solid rgba(70, 139, 223, 0.14);
    border-radius: 20px;
    box-shadow: 0 24px 60px rgba(41, 79, 125, 0.16);
}

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

.site-nav a {
    padding: 11px 14px;
    border-radius: 14px;
    color: #40516a;
    font-size: 15px;
}

.site-nav a.active,
.site-nav a:hover {
    background: rgba(70, 139, 223, 0.10);
    color: rgb(70,139,223);
}

.hero {
    padding: 48px 0 34px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    align-items: center;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    color: rgb(70,139,223);
    background: rgba(70, 139, 223, 0.10);
    border: 1px solid rgba(70, 139, 223, 0.16);
    border-radius: 999px;
    font-weight: 700;
    font-size: 13px;
}

h1,
h2,
h3 {
    color: #102a51;
    line-height: 1.2;
    margin: 0;
}

h1 {
    margin-top: 18px;
    font-size: clamp(32px, 9vw, 58px);
    letter-spacing: -0.04em;
}

h2 {
    font-size: clamp(26px, 6vw, 38px);
    letter-spacing: -0.03em;
}

h3 {
    font-size: 20px;
}

.lead {
    margin: 18px 0 0;
    color: #536579;
    font-size: 17px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    margin-top: 26px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 26px;
    border-radius: 999px;
    background: rgb(70,139,223);
    color: #ffffff;
    font-weight: 800;
    box-shadow: 0 14px 30px rgba(70, 139, 223, 0.28);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    border: 0;
    cursor: pointer;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 36px rgba(70, 139, 223, 0.34);
    background: #3f82d2;
}

.trust-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
}

.trust-tags span,
.badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 12px;
    border-radius: 999px;
    background: #ffffff;
    color: #33506f;
    border: 1px solid rgba(70, 139, 223, 0.14);
    box-shadow: 0 8px 24px rgba(70, 139, 223, 0.08);
    font-size: 13px;
    font-weight: 700;
}

.hero-visual {
    position: relative;
    padding: 24px;
    border-radius: 30px;
    background: linear-gradient(145deg, rgba(70, 139, 223, 0.18), rgba(255,255,255,0.92));
    border: 1px solid rgba(70, 139, 223, 0.16);
    box-shadow: 0 28px 80px rgba(40, 80, 125, 0.13);
}

.hero-visual img {
    margin: 0 auto;
    border-radius: 28px;
}

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

.metric {
    padding: 18px;
    border-radius: 20px;
    background: rgba(255,255,255,0.86);
    border: 1px solid rgba(70, 139, 223, 0.12);
}

.metric strong {
    display: block;
    color: rgb(70,139,223);
    font-size: 24px;
    line-height: 1.1;
}

.metric span {
    color: #5b6d80;
    font-size: 14px;
}

.section {
    padding: 42px 0;
}

.section-header {
    margin-bottom: 22px;
    max-width: 760px;
}

.section-header p {
    margin: 12px 0 0;
    color: #5b6d80;
}

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

.card,
.info-card,
.faq-item,
.step-card {
    background: #ffffff;
    border: 1px solid rgba(70, 139, 223, 0.12);
    border-radius: 22px;
    padding: 22px;
    box-shadow: 0 14px 40px rgba(27, 68, 115, 0.08);
}

.card p,
.info-card p,
.step-card p,
.faq-item p {
    color: #596b7d;
    margin-bottom: 0;
}

.card-icon {
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
    border-radius: 16px;
    background: rgba(70, 139, 223, 0.12);
    color: rgb(70,139,223);
    font-weight: 900;
}

.two-col {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
    align-items: start;
}

.soft-panel {
    padding: 24px;
    border-radius: 26px;
    background: linear-gradient(150deg, rgba(70, 139, 223, 0.10), rgba(255,255,255,0.92));
    border: 1px solid rgba(70, 139, 223, 0.14);
}

.soft-panel ul,
.clean-list {
    padding-left: 20px;
    margin: 14px 0 0;
    color: #52677d;
}

.clean-list li {
    margin: 8px 0;
}

.page-hero {
    padding: 48px 0 28px;
    background: radial-gradient(circle at top right, rgba(70, 139, 223, 0.16), transparent 42%);
}

.page-content {
    padding: 28px 0 52px;
}

.article-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.article-body {
    background: #ffffff;
    border: 1px solid rgba(70, 139, 223, 0.12);
    border-radius: 26px;
    padding: 24px;
    box-shadow: 0 18px 46px rgba(27, 68, 115, 0.08);
}

.article-body p {
    color: #52677d;
}

.article-body p:first-of-type {
    margin-top: 0;
}

.side-card {
    background: linear-gradient(160deg, #eef6ff, #ffffff);
    border: 1px solid rgba(70, 139, 223, 0.14);
    border-radius: 26px;
    padding: 22px;
    box-shadow: 0 18px 44px rgba(27, 68, 115, 0.08);
}

.steps {
    counter-reset: step;
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}

.step-card {
    position: relative;
    padding-left: 62px;
}

.step-card::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    left: 20px;
    top: 22px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: rgb(70,139,223);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
}

.faq-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 14px;
}

.faq-item h3 {
    font-size: 18px;
}

.cta-band {
    text-align: center;
    padding: 34px 22px;
    border-radius: 28px;
    background: linear-gradient(135deg, rgba(70,139,223,0.14), rgba(255,255,255,0.96));
    border: 1px solid rgba(70,139,223,0.16);
    box-shadow: 0 20px 50px rgba(27,68,115,0.09);
}

.cta-band p {
    max-width: 720px;
    margin: 12px auto 0;
    color: #536579;
}

.cta-band .download-btn {
    margin-top: 20px;
}

.site-footer {
    background: #102a51;
    color: rgba(255,255,255,0.78);
    padding: 44px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 26px;
}

.footer-brand {
    color: #ffffff;
    margin-bottom: 12px;
}

.site-footer h3 {
    color: #ffffff;
    font-size: 16px;
    margin-bottom: 10px;
}

.site-footer a:not(.footer-brand) {
    display: block;
    color: rgba(255,255,255,0.72);
    margin: 7px 0;
    font-size: 14px;
}

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

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

@media (min-width: 640px) {
    .container {
        width: min(100% - 56px, 1160px);
    }

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

    .hero {
        padding-top: 68px;
    }

    .article-body,
    .side-card,
    .card,
    .info-card,
    .faq-item,
    .step-card {
        padding: 26px;
    }
}

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

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

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

    .hero-grid,
    .two-col,
    .article-layout {
        grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
        gap: 42px;
    }

    .feature-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .footer-grid {
        grid-template-columns: 1.5fr repeat(3, 1fr);
    }

    .section {
        padding: 62px 0;
    }

    .page-hero {
        padding: 70px 0 40px;
    }

    .page-content {
        padding-bottom: 78px;
    }
}

@media (min-width: 1120px) {
    .hero {
        padding: 86px 0 54px;
    }

    .metric-strip {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}