:root {
    --primary: rgb(70,139,223);
    --primary-deep: #2268b9;
    --ink: #11233c;
    --muted: #60708a;
    --line: #d9e6f7;
    --soft: #f4f8fe;
    --soft-blue: #eaf4ff;
    --white: #ffffff;
    --shadow: 0 18px 48px rgba(33, 88, 152, .12);
    --radius: 22px;
    --max: 1180px;
}

* { 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: var(--ink);
    background: linear-gradient(180deg, #ffffff 0%, #f7fbff 34%, #ffffff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(217,230,247,.86);
}
.nav-wrap {
    width: min(100%, var(--max));
    margin: 0 auto;
    padding: 14px 18px;
    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: .02em; }
.brand-logo { width: 36px; height: 36px; border-radius: 12px; }
.brand-text { font-size: 16px; }
.nav-toggle {
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--white);
    color: var(--ink);
    font-size: 20px;
}
.site-nav {
    display: none;
    position: absolute;
    left: 18px;
    right: 18px;
    top: 66px;
    padding: 12px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
}
.site-nav.is-open { display: grid; gap: 4px; }
.site-nav a {
    padding: 12px 14px;
    border-radius: 12px;
    color: #253a57;
    font-size: 14px;
}
.site-nav a:hover { background: var(--soft-blue); color: var(--primary-deep); }

.container, .section {
    width: min(100% - 36px, var(--max));
    margin: 0 auto;
}
.section { padding: 66px 0; }
.section-kicker, .eyebrow, .badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-deep);
    background: rgba(70,139,223,.10);
    border: 1px solid rgba(70,139,223,.18);
    border-radius: 999px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 700;
}
h1, h2, h3 { line-height: 1.16; margin: 0; letter-spacing: -.03em; }
h1 { font-size: clamp(34px, 11vw, 76px); }
h2 { font-size: clamp(28px, 7vw, 48px); }
h3 { font-size: clamp(20px, 5vw, 28px); }
p { color: var(--muted); margin: 0; }
.lead { font-size: 17px; color: #41536c; }

.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;
    border: 1px solid rgba(70,139,223,.2);
    box-shadow: 0 14px 28px rgba(70,139,223,.24);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-deep); box-shadow: 0 18px 34px rgba(70,139,223,.28); }

.magazine-hero {
    width: min(100% - 36px, var(--max));
    margin: 0 auto;
    padding: 56px 0 68px;
    display: grid;
    gap: 34px;
}
.hero-copy { display: grid; gap: 22px; align-content: center; }
.hero-copy h1 span { color: var(--primary); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.security-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.security-tags span {
    border: 1px solid var(--line);
    background: rgba(255,255,255,.74);
    color: #425a77;
    border-radius: 999px;
    padding: 7px 12px;
    font-size: 13px;
}
.product-visual {
    position: relative;
    min-height: 520px;
    padding: 26px;
    border-radius: 32px;
    background: radial-gradient(circle at 18% 8%, rgba(70,139,223,.20), transparent 30%), linear-gradient(145deg, #f7fbff, #e9f4ff);
    border: 1px solid rgba(70,139,223,.16);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.product-visual .app-screen {
    width: min(76%, 320px);
    margin: 24px auto 0;
    filter: drop-shadow(0 28px 44px rgba(23, 70, 126, .18));
    border-radius: 34px;
}
.status-card, .mini-card {
    position: absolute;
    background: rgba(255,255,255,.92);
    border: 1px solid rgba(217,230,247,.9);
    border-radius: 18px;
    padding: 14px;
    box-shadow: 0 14px 30px rgba(33,88,152,.12);
    max-width: 210px;
}
.status-card { top: 26px; left: 20px; }
.mini-card.backup { right: 18px; top: 168px; }
.mini-card.assets { left: 18px; bottom: 28px; }
.card-label { color: var(--muted); font-size: 12px; }
.card-value { color: var(--ink); font-weight: 800; margin-top: 3px; }

.brand-statement {
    width: min(100% - 36px, var(--max));
    margin: 0 auto;
    padding: 46px 28px;
    border-radius: 30px;
    background: linear-gradient(135deg, #ffffff, #edf6ff);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    display: grid;
    gap: 24px;
}
.statement-quote {
    font-size: clamp(25px, 6vw, 46px);
    line-height: 1.22;
    letter-spacing: -.04em;
    color: #122948;
    max-width: 900px;
}
.statement-body { display: grid; gap: 14px; }
.statement-line {
    border-left: 3px solid var(--primary);
    padding-left: 16px;
    color: #304763;
    font-weight: 700;
}

.story-timeline { position: relative; display: grid; gap: 20px; margin-top: 28px; }
.timeline-item {
    display: grid;
    gap: 12px;
    padding: 22px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 10px 26px rgba(33,88,152,.08);
}
.timeline-no { color: var(--primary); font-weight: 900; letter-spacing: .08em; }
.inline-link { color: var(--primary-deep); font-weight: 800; }

.split-section { display: grid; gap: 26px; align-items: center; }
.split-section + .split-section { margin-top: 36px; }
.split-copy { display: grid; gap: 18px; }
.info-panel {
    padding: 26px;
    border-radius: 30px;
    background: linear-gradient(145deg, #eef7ff, #ffffff);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.info-row {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 14px;
    align-items: start;
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
}
.info-row:last-child { border-bottom: 0; }
.info-dot {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: grid;
    place-items: center;
    font-size: 12px;
    font-weight: 800;
}

.chapter-index {
    display: grid;
    gap: 28px;
    padding: 34px;
    border-radius: 34px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.chapter-list { display: grid; gap: 0; }
.chapter-link {
    display: grid;
    gap: 7px;
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
}
.chapter-link:last-child { border-bottom: 0; }
.chapter-no { color: var(--primary); font-weight: 900; letter-spacing: .1em; font-size: 13px; }
.chapter-link strong { font-size: 20px; color: var(--ink); }
.chapter-link p { font-size: 14px; }

.scenario-story-grid { display: grid; gap: 18px; margin-top: 28px; }
.scenario-card {
    padding: 24px;
    border-radius: var(--radius);
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: 0 10px 26px rgba(33,88,152,.08);
    display: grid;
    gap: 12px;
}
.scenario-card.featured {
    background: linear-gradient(135deg, #edf6ff, #ffffff);
    min-height: 230px;
}

.risk-panel {
    padding: 30px;
    border-radius: 34px;
    background: linear-gradient(135deg, #edf6ff, #f8fbff);
    border: 1px solid rgba(70,139,223,.16);
}
.risk-grid { display: grid; gap: 16px; margin-top: 24px; }
.risk-item {
    background: rgba(255,255,255,.78);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 18px;
}
.risk-item strong { display: block; margin-bottom: 6px; color: var(--ink); }

.faq-list { display: grid; gap: 14px; margin-top: 24px; }
.faq-item {
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 20px;
    background: var(--white);
}
.faq-item h3 { font-size: 18px; margin-bottom: 8px; letter-spacing: 0; }

.cta-section {
    width: min(100% - 36px, var(--max));
    margin: 26px auto 74px;
    text-align: center;
    padding: 46px 24px;
    border-radius: 34px;
    background: linear-gradient(135deg, #ffffff, #eaf4ff);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    display: grid;
    gap: 18px;
    justify-items: center;
}

.page-hero {
    width: min(100% - 36px, 980px);
    margin: 0 auto;
    padding: 58px 0 30px;
    display: grid;
    gap: 18px;
}
.article-layout {
    width: min(100% - 36px, var(--max));
    margin: 0 auto 72px;
    display: grid;
    gap: 28px;
}
.article-main {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 26px;
    box-shadow: var(--shadow);
    display: grid;
    gap: 22px;
}
.article-main p { font-size: 16px; }
.article-side { display: grid; gap: 16px; align-content: start; }
.note-box, .checklist, .steps-box {
    padding: 22px;
    border-radius: 22px;
    border: 1px solid var(--line);
    background: linear-gradient(135deg, #f8fbff, #ffffff);
}
.checklist ul, .steps-box ol, .note-box ul { margin: 12px 0 0; padding-left: 20px; color: var(--muted); }
.checklist li, .steps-box li, .note-box li { margin: 8px 0; }
.page-download { margin-top: 8px; }

.download-page-panel {
    width: min(100% - 36px, 980px);
    margin: 0 auto 72px;
    display: grid;
    gap: 24px;
}
.download-card {
    padding: 30px;
    border-radius: 32px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    display: grid;
    gap: 22px;
    justify-items: start;
}

.site-footer {
    background: #f4f8fe;
    border-top: 1px solid var(--line);
    padding: 36px 18px 22px;
}
.footer-inner {
    width: min(100%, var(--max));
    margin: 0 auto;
    display: grid;
    gap: 24px;
}
.footer-brand { font-weight: 900; font-size: 22px; margin-bottom: 8px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 10px 18px; align-content: start; }
.footer-links a { color: var(--muted); font-size: 14px; }
.footer-note { width: min(100%, var(--max)); margin: 24px auto 0; color: #7a8798; font-size: 13px; }

@media (min-width: 760px) {
    .nav-toggle { display: none; }
    .site-nav {
        display: flex;
        position: static;
        padding: 0;
        border: 0;
        box-shadow: none;
        background: transparent;
        gap: 4px;
        width: auto;
    }
    .magazine-hero { grid-template-columns: 1.02fr .78fr; padding-top: 80px; }
    .brand-statement { grid-template-columns: .96fr 1fr; padding: 58px; }
    .split-section { grid-template-columns: 1fr 1fr; }
    .split-section.reverse .split-copy { order: 2; }
    .chapter-index { grid-template-columns: .72fr 1fr; padding: 48px; }
    .scenario-story-grid { grid-template-columns: 1.1fr .9fr .9fr; }
    .scenario-card.featured { grid-row: span 2; }
    .risk-grid { grid-template-columns: repeat(3, 1fr); }
    .article-layout { grid-template-columns: minmax(0, 1fr) 330px; align-items: start; }
    .article-main { padding: 38px; }
    .footer-inner { grid-template-columns: 1fr auto; }
}

@media (min-width: 980px) {
    .story-timeline {
        grid-template-columns: 1fr 1fr;
        gap: 26px 72px;
    }
    .story-timeline:before {
        content: "";
        position: absolute;
        top: 0;
        bottom: 0;
        left: 50%;
        width: 1px;
        background: var(--line);
    }
    .timeline-item:nth-child(even) { transform: translateY(44px); }
    .section { padding: 84px 0; }
}