* {
    box-sizing: border-box;
}
:root {
    --primary: rgb(70,139,223);
    --primary-dark: #245eaa;
    --primary-soft: #eef6ff;
    --text: #14233b;
    --muted: #65738a;
    --line: #dfeaf6;
    --card: #ffffff;
    --bg: #f6faff;
    --radius: 22px;
    --shadow: 0 18px 48px rgba(47, 95, 148, 0.12);
}
html {
    scroll-behavior: smooth;
}
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #f7fbff 0%, #ffffff 46%, #f7fbff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}
a {
    color: inherit;
    text-decoration: none;
}
img {
    max-width: 100%;
    display: block;
}
.container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid rgba(202, 221, 242, 0.72);
    backdrop-filter: blur(18px);
}
.nav-wrap {
    min-height: 70px;
    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: #10233f;
}
.logo {
    width: 38px;
    height: 38px;
    border-radius: 12px;
}
.brand-text {
    font-size: 18px;
}
.nav-toggle {
    display: none;
}
.nav-toggle-label {
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: 14px;
    display: grid;
    place-content: center;
    gap: 5px;
    cursor: pointer;
}
.nav-toggle-label span {
    width: 18px;
    height: 2px;
    background: var(--text);
    display: block;
    border-radius: 2px;
}
.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 76px;
    display: none;
    flex-direction: column;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #fff;
    box-shadow: var(--shadow);
}
.site-nav a {
    padding: 12px 14px;
    color: #31445e;
    border-radius: 12px;
    font-size: 15px;
}
.site-nav a:hover {
    background: var(--primary-soft);
    color: var(--primary-dark);
}
.nav-toggle:checked ~ .site-nav {
    display: flex;
}
.section {
    padding: 62px 0;
}
.section-tight {
    padding: 42px 0;
}
.eyebrow,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-dark);
    background: rgba(70,139,223,0.10);
    border: 1px solid rgba(70,139,223,0.18);
    border-radius: 999px;
    padding: 7px 12px;
    font-size: 13px;
    font-weight: 700;
}
.hero-layout {
    padding: 56px 0 42px;
}
.hero-card {
    position: relative;
    overflow: hidden;
    border-radius: 30px;
    padding: 28px;
    background:
        radial-gradient(circle at 78% 18%, rgba(70,139,223,0.20), transparent 30%),
        linear-gradient(135deg, #ffffff 0%, #f1f7ff 58%, #e8f3ff 100%);
    box-shadow: var(--shadow);
    border: 1px solid rgba(199, 221, 245, 0.8);
}
.hero-grid {
    display: grid;
    gap: 34px;
    align-items: center;
}
.hero-copy h1 {
    margin: 18px 0 16px;
    font-size: clamp(34px, 8vw, 70px);
    line-height: 1.06;
    letter-spacing: -0.06em;
}
.hero-copy p {
    margin: 0 0 20px;
    color: var(--muted);
    font-size: 16px;
}
.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 18px 0 24px;
}
.hero-tags span,
.pill {
    display: inline-flex;
    align-items: center;
    border: 1px solid rgba(70,139,223,0.22);
    color: #24415f;
    background: rgba(255,255,255,0.78);
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 13px;
    font-weight: 650;
}
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    color: #fff;
    background: var(--primary);
    box-shadow: 0 14px 30px rgba(70,139,223,0.28);
    font-weight: 800;
    border: 0;
    cursor: pointer;
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover {
    transform: translateY(-1px);
    background: #3f80d2;
    box-shadow: 0 18px 36px rgba(70,139,223,0.34);
}
.product-visual {
    position: relative;
    min-height: 360px;
    display: grid;
    place-items: center;
}
.app-frame {
    width: min(270px, 76vw);
    border-radius: 36px;
    padding: 12px;
    background: linear-gradient(180deg, #ffffff, #edf6ff);
    border: 1px solid rgba(70,139,223,0.18);
    box-shadow: 0 26px 60px rgba(34, 72, 112, 0.18);
}
.visual-chip,
.status-card {
    background: rgba(255,255,255,0.9);
    border: 1px solid rgba(196, 216, 240, 0.85);
    box-shadow: 0 16px 34px rgba(42, 87, 132, 0.12);
    border-radius: 18px;
    padding: 12px 14px;
    color: #263d59;
    font-size: 13px;
}
.status-card {
    position: absolute;
    left: 0;
    top: 18px;
    max-width: 180px;
}
.status-card strong {
    display: block;
    color: var(--primary-dark);
    font-size: 15px;
}
.visual-chip {
    position: absolute;
}
.chip-1 { right: 0; top: 70px; }
.chip-2 { left: 10px; bottom: 40px; }
.chip-3 { right: 8px; bottom: 90px; }
.chip-4 { right: 20px; bottom: 22px; }
.section-head {
    max-width: 760px;
    margin-bottom: 26px;
}
.section-head.center {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}
.section-head h2 {
    margin: 12px 0;
    font-size: clamp(28px, 5vw, 46px);
    line-height: 1.12;
    letter-spacing: -0.04em;
}
.section-head p {
    margin: 0;
    color: var(--muted);
}
.metrics-strip,
.feature-grid,
.category-grid,
.scenario-grid,
.faq-list,
.step-grid {
    display: grid;
    gap: 16px;
}
.metrics-strip {
    grid-template-columns: 1fr;
}
.metric-card,
.feature-card,
.category-card,
.scenario-card,
.faq-item,
.tip-card,
.content-card {
    border: 1px solid rgba(200, 219, 241, 0.86);
    background: rgba(255,255,255,0.88);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 12px 34px rgba(47, 95, 148, 0.08);
}
.metric-card strong {
    display: block;
    font-size: 20px;
    margin-bottom: 6px;
}
.metric-card p,
.feature-card p,
.category-card p,
.scenario-card p,
.tip-card p,
.content-card p {
    color: var(--muted);
    margin: 0;
}
.step-grid {
    counter-reset: step;
}
.step-card {
    counter-increment: step;
    position: relative;
    padding: 22px;
    border-radius: var(--radius);
    background: linear-gradient(180deg, #fff, #f4f9ff);
    border: 1px solid rgba(70,139,223,0.18);
}
.step-card::before {
    content: "0" counter(step);
    display: inline-flex;
    color: var(--primary-dark);
    font-weight: 900;
    letter-spacing: -0.04em;
    margin-bottom: 14px;
}
.step-card h3,
.feature-card h3,
.category-card h3,
.scenario-card h3,
.tip-card h3,
.content-card h3,
.faq-item h3 {
    margin: 0 0 8px;
    line-height: 1.3;
}
.step-card p {
    color: var(--muted);
    margin: 0 0 12px;
}
.text-link {
    color: var(--primary-dark);
    font-weight: 800;
}
.category-nav {
    padding: 20px;
    border-radius: 28px;
    background: linear-gradient(135deg, rgba(70,139,223,0.10), rgba(255,255,255,0.9));
    border: 1px solid rgba(70,139,223,0.14);
}
.category-grid {
    grid-template-columns: 1fr;
}
.category-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.category-card .num {
    color: var(--primary-dark);
    font-size: 13px;
    font-weight: 900;
}
.feature-grid {
    grid-template-columns: 1fr;
}
.security-layout {
    display: grid;
    gap: 24px;
    align-items: center;
    padding: 28px;
    border-radius: 30px;
    background: linear-gradient(135deg, #edf6ff, #ffffff);
    border: 1px solid rgba(70,139,223,0.16);
}
.security-panel {
    display: grid;
    gap: 14px;
}
.security-line {
    padding: 16px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid rgba(198, 218, 241, 0.8);
}
.security-line strong {
    display: block;
}
.security-line span {
    color: var(--muted);
    font-size: 14px;
}
.process-steps {
    display: grid;
    gap: 14px;
}
.process-step {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 16px;
}
.process-step b {
    flex: 0 0 auto;
    width: 34px;
    height: 34px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    background: var(--primary);
    color: #fff;
}
.scenario-grid {
    grid-template-columns: 1fr;
}
.scenario-card {
    min-height: 170px;
}
.faq-list {
    max-width: 920px;
    margin: 0 auto;
}
.faq-item h3 {
    font-size: 18px;
}
.faq-item p {
    margin: 0;
    color: var(--muted);
}
.cta-section {
    padding: 56px 0 72px;
}
.cta-box {
    text-align: center;
    border-radius: 32px;
    padding: 36px 24px;
    background:
        radial-gradient(circle at 50% 0%, rgba(70,139,223,0.18), transparent 38%),
        linear-gradient(135deg, #eef7ff, #ffffff);
    border: 1px solid rgba(70,139,223,0.17);
    box-shadow: var(--shadow);
}
.cta-box h2 {
    margin: 0 0 10px;
    font-size: clamp(28px, 5vw, 44px);
    letter-spacing: -0.04em;
}
.cta-box p {
    color: var(--muted);
    max-width: 680px;
    margin: 0 auto 22px;
}
.page-hero {
    padding: 50px 0 28px;
}
.page-hero-box {
    border-radius: 30px;
    padding: 28px;
    background: linear-gradient(135deg, #ffffff, #eef7ff);
    border: 1px solid rgba(70,139,223,0.16);
    box-shadow: var(--shadow);
}
.page-hero h1 {
    margin: 16px 0 14px;
    font-size: clamp(32px, 7vw, 56px);
    line-height: 1.08;
    letter-spacing: -0.05em;
}
.page-hero p {
    margin: 0;
    color: var(--muted);
    max-width: 780px;
}
.article-layout {
    display: grid;
    gap: 22px;
    padding: 34px 0 68px;
}
.article-main {
    display: grid;
    gap: 18px;
}
.article-main p {
    margin: 0;
    color: #40536c;
}
.article-main h2 {
    margin: 8px 0 2px;
    font-size: clamp(24px, 4vw, 34px);
    letter-spacing: -0.03em;
}
.side-panel {
    align-self: start;
    border-radius: var(--radius);
    padding: 20px;
    background: linear-gradient(180deg, #eef7ff, #ffffff);
    border: 1px solid rgba(70,139,223,0.18);
}
.side-panel ul,
.check-list {
    margin: 12px 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 10px;
}
.side-panel li,
.check-list li {
    position: relative;
    padding-left: 20px;
    color: #53657c;
}
.side-panel li::before,
.check-list li::before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--primary);
    position: absolute;
    left: 0;
    top: 12px;
}
.notice {
    border-left: 4px solid var(--primary);
    background: var(--primary-soft);
    padding: 18px;
    border-radius: 16px;
    color: #334963;
}
.download-row {
    margin-top: 14px;
}
.site-footer {
    background: #10243d;
    color: rgba(255,255,255,0.76);
    padding: 44px 0 22px;
}
.footer-grid {
    display: grid;
    gap: 28px;
}
.footer-brand {
    color: #fff;
    font-size: 20px;
    font-weight: 900;
    margin-bottom: 10px;
}
.site-footer h3 {
    color: #fff;
    margin: 0 0 12px;
}
.site-footer a {
    display: block;
    color: rgba(255,255,255,0.76);
    margin: 8px 0;
}
.footer-bottom {
    margin-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.12);
    padding-top: 18px;
    font-size: 13px;
}
@media (min-width: 680px) {
    .metrics-strip,
    .feature-grid,
    .category-grid,
    .scenario-grid,
    .step-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .page-hero-box,
    .hero-card {
        padding: 40px;
    }
}
@media (min-width: 920px) {
    .nav-toggle-label {
        display: none;
    }
    .site-nav {
        position: static;
        display: flex;
        flex-direction: row;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
        gap: 4px;
    }
    .site-nav a {
        padding: 9px 12px;
    }
    .hero-grid {
        grid-template-columns: 1.04fr 0.96fr;
    }
    .hero-layout {
        padding: 82px 0 52px;
    }
    .metrics-strip {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
    .step-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .category-grid,
    .feature-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .security-layout {
        grid-template-columns: 0.95fr 1.05fr;
        padding: 42px;
    }
    .scenario-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .article-layout {
        grid-template-columns: minmax(0, 1fr) 310px;
        gap: 34px;
    }
    .footer-grid {
        grid-template-columns: 1.5fr 1fr 1fr;
    }
}
@media (min-width: 1120px) {
    .hero-card {
        padding: 54px;
    }
    .section {
        padding: 78px 0;
    }
}