:root {
    --primary: rgb(70,139,223);
    --primary-deep: #1f5fa8;
    --ink: #132542;
    --muted: #60708b;
    --line: #dce8f6;
    --soft: #f4f8fd;
    --soft-blue: #eaf4ff;
    --white: #ffffff;
    --radius: 22px;
    --shadow: 0 18px 50px rgba(43, 98, 170, .10);
}
* { 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:
        radial-gradient(circle at top left, rgba(70,139,223,.12), transparent 36rem),
        linear-gradient(180deg, #ffffff 0%, #f7fbff 58%, #ffffff 100%);
    line-height: 1.72;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255,255,255,.88);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(220,232,246,.8);
}
.nav-shell {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    letter-spacing: .03em;
    color: var(--ink);
}
.brand img { width: 118px; height: auto; }
.brand span { white-space: nowrap; }
.nav-toggle {
    border: 1px solid var(--line);
    background: #fff;
    color: var(--primary-deep);
    border-radius: 999px;
    padding: 9px 15px;
    font-size: 14px;
}
.site-nav {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    padding: 14px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
}
.site-nav.open { display: grid; gap: 6px; }
.site-nav a {
    padding: 10px 12px;
    border-radius: 14px;
    color: var(--muted);
    font-size: 15px;
}
.site-nav a.active,
.site-nav a:hover {
    color: var(--primary-deep);
    background: var(--soft-blue);
}
.content-container,
.section,
.magazine-hero,
.page-hero,
.cta-section,
.footer-inner,
.footer-bottom {
    width: min(1120px, calc(100% - 32px));
    margin-left: auto;
    margin-right: auto;
}
.section { padding: 72px 0; }
.section-kicker,
.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
    color: var(--primary-deep);
    font-size: 13px;
    letter-spacing: .14em;
    text-transform: uppercase;
    font-weight: 700;
}
.section-badge {
    padding: 7px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255,255,255,.72);
}
h1, h2, h3 { margin: 0; line-height: 1.18; letter-spacing: -.03em; }
h1 { font-size: clamp(38px, 11vw, 76px); }
h2 { font-size: clamp(28px, 7vw, 48px); }
h3 { font-size: clamp(21px, 5vw, 30px); }
p { margin: 0; color: var(--muted); }
.lead {
    font-size: clamp(17px, 4.4vw, 21px);
    color: #475875;
}
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 26px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 700;
    letter-spacing: .04em;
    box-shadow: 0 16px 30px rgba(70,139,223,.24);
    transition: transform .2s ease, box-shadow .2s ease;
}
.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 38px rgba(70,139,223,.30);
}
.magazine-hero {
    min-height: calc(100vh - 72px);
    padding: 56px 0 72px;
    display: grid;
    gap: 44px;
    align-items: center;
}
.hero-copy {
    display: grid;
    gap: 22px;
}
.hero-copy h1 em {
    color: var(--primary);
    font-style: normal;
}
.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.hero-tags span,
.pill {
    border: 1px solid var(--line);
    background: rgba(255,255,255,.76);
    color: var(--primary-deep);
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 13px;
}
.product-visual {
    position: relative;
    min-height: 500px;
    padding: 26px;
    border: 1px solid rgba(220,232,246,.9);
    border-radius: 34px;
    background:
        linear-gradient(150deg, rgba(70,139,223,.13), rgba(255,255,255,.85)),
        #fff;
    box-shadow: var(--shadow);
}
.product-visual .app-shot {
    width: min(440px, 92%);
    margin: 0 auto;
    filter: drop-shadow(0 30px 55px rgba(31,95,168,.16));
}
.float-card {
    position: relative;
    margin-top: 12px;
    padding: 14px 16px;
    border-radius: 18px;
    border: 1px solid rgba(220,232,246,.9);
    background: rgba(255,255,255,.88);
    box-shadow: 0 14px 35px rgba(31,95,168,.08);
}
.float-card strong { display: block; color: var(--ink); }
.float-card span { color: var(--muted); font-size: 14px; }
.brand-statement {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
    padding: 52px 24px;
    border-radius: 34px;
    background:
        linear-gradient(135deg, rgba(70,139,223,.12), rgba(255,255,255,.95) 50%),
        #fff;
    border: 1px solid var(--line);
}
.brand-statement blockquote {
    margin: 0 0 24px;
    font-size: clamp(28px, 7vw, 56px);
    line-height: 1.14;
    letter-spacing: -.04em;
    color: var(--ink);
}
.brand-statement .statement-grid {
    display: grid;
    gap: 18px;
}
.brand-statement p { font-size: 17px; }
.split-section {
    display: grid;
    gap: 28px;
    align-items: center;
}
.split-section + .split-section { margin-top: 42px; }
.split-text {
    display: grid;
    gap: 16px;
}
.info-panel {
    padding: 26px;
    border-radius: 28px;
    border: 1px solid var(--line);
    background: #fff;
    box-shadow: var(--shadow);
}
.info-panel .metric {
    display: grid;
    gap: 6px;
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
}
.info-panel .metric:last-child { border-bottom: 0; }
.metric b { color: var(--primary-deep); font-size: 22px; }
.story-timeline {
    position: relative;
    display: grid;
    gap: 18px;
}
.timeline-item {
    display: grid;
    gap: 10px;
    padding: 24px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 26px;
    box-shadow: 0 12px 32px rgba(31,95,168,.06);
}
.timeline-item .num,
.chapter-item .num {
    color: var(--primary);
    font-weight: 800;
    letter-spacing: .18em;
    font-size: 13px;
}
.text-link {
    color: var(--primary-deep);
    font-weight: 700;
}
.chapter-index {
    display: grid;
    gap: 30px;
    padding: 32px 24px;
    border-radius: 34px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.chapter-list {
    display: grid;
    gap: 4px;
}
.chapter-item {
    display: grid;
    gap: 8px;
    padding: 20px 0;
    border-bottom: 1px solid var(--line);
}
.chapter-item:last-child { border-bottom: 0; }
.scenario-story-grid {
    display: grid;
    gap: 18px;
}
.scenario-card {
    min-height: 210px;
    display: grid;
    align-content: space-between;
    gap: 20px;
    padding: 26px;
    border-radius: 30px;
    background:
        linear-gradient(145deg, #fff, rgba(234,244,255,.72));
    border: 1px solid var(--line);
}
.scenario-card.large {
    background:
        linear-gradient(135deg, rgba(70,139,223,.15), rgba(255,255,255,.88)),
        #fff;
}
.risk-panel {
    padding: 30px 22px;
    border-radius: 34px;
    background:
        radial-gradient(circle at top right, rgba(70,139,223,.20), transparent 24rem),
        linear-gradient(135deg, #edf6ff, #ffffff);
    border: 1px solid var(--line);
}
.risk-grid {
    display: grid;
    gap: 14px;
    margin-top: 26px;
}
.risk-item {
    padding: 18px;
    border-radius: 20px;
    background: rgba(255,255,255,.78);
    border: 1px solid rgba(220,232,246,.9);
}
.faq-list {
    display: grid;
    gap: 14px;
}
.faq-item {
    padding: 22px;
    border-radius: 24px;
    border: 1px solid var(--line);
    background: #fff;
}
.faq-item h3 {
    font-size: 20px;
    margin-bottom: 8px;
    letter-spacing: 0;
}
.cta-section {
    margin-top: 42px;
    margin-bottom: 76px;
    text-align: center;
    padding: 48px 22px;
    border-radius: 34px;
    background:
        linear-gradient(135deg, rgba(70,139,223,.14), rgba(255,255,255,.96)),
        #fff;
    border: 1px solid var(--line);
}
.cta-section p {
    max-width: 720px;
    margin: 14px auto 24px;
}
.compact-cta { margin-top: 16px; }
.page-hero {
    padding: 62px 0 34px;
    display: grid;
    gap: 16px;
}
.page-hero h1 { max-width: 930px; }
.page-summary {
    max-width: 760px;
    font-size: 18px;
}
.guide-layout {
    display: grid;
    gap: 24px;
    align-items: start;
    padding-top: 28px;
}
.guide-content {
    display: grid;
    gap: 24px;
}
.guide-block {
    padding: 26px;
    border-radius: 28px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: 0 12px 32px rgba(31,95,168,.06);
}
.guide-block h2 { font-size: clamp(25px, 6vw, 36px); margin-bottom: 12px; }
.guide-block h3 { font-size: 21px; margin-bottom: 8px; letter-spacing: 0; }
.step-list,
.check-list {
    display: grid;
    gap: 12px;
    margin-top: 18px;
}
.step-list li,
.check-list li {
    list-style: none;
    padding: 15px 16px;
    border-radius: 18px;
    background: var(--soft);
    border: 1px solid var(--line);
    color: #40516d;
}
.step-list,
.check-list { padding-left: 0; }
.guide-aside {
    display: grid;
    gap: 14px;
    padding: 22px;
    border-radius: 26px;
    background: linear-gradient(180deg, #fff, #f4f9ff);
    border: 1px solid var(--line);
}
.guide-aside a {
    padding: 13px 0;
    border-bottom: 1px solid var(--line);
    color: var(--primary-deep);
    font-weight: 700;
}
.guide-aside a:last-child { border-bottom: 0; }
.download-steps {
    counter-reset: steps;
    display: grid;
    gap: 14px;
    margin-top: 22px;
}
.download-steps div {
    counter-increment: steps;
    padding: 20px;
    border-radius: 22px;
    background: #fff;
    border: 1px solid var(--line);
}
.download-steps div::before {
    content: "0" counter(steps);
    display: inline-block;
    margin-bottom: 8px;
    color: var(--primary);
    font-weight: 800;
    letter-spacing: .16em;
}
.about-grid {
    display: grid;
    gap: 18px;
}
.about-card {
    padding: 26px;
    border-radius: 28px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: 0 10px 28px rgba(31,95,168,.05);
}
.site-footer {
    margin-top: 40px;
    background: #f2f7fe;
    border-top: 1px solid var(--line);
}
.footer-inner {
    padding: 44px 0 28px;
    display: grid;
    gap: 26px;
}
.footer-logo { width: 138px; margin-bottom: 16px; }
.footer-links {
    display: grid;
    gap: 10px;
}
.footer-links a { color: var(--primary-deep); }
.footer-bottom {
    padding: 18px 0 32px;
    color: var(--muted);
    font-size: 13px;
}
@media (min-width: 760px) {
    .section { padding: 92px 0; }
    .nav-toggle { display: none; }
    .site-nav {
        position: static;
        display: flex;
        align-items: center;
        gap: 6px;
        padding: 0;
        border: 0;
        border-radius: 0;
        background: transparent;
        box-shadow: none;
    }
    .site-nav a { padding: 9px 12px; }
    .magazine-hero {
        grid-template-columns: 1.02fr .98fr;
        gap: 54px;
        padding-top: 72px;
    }
    .product-visual { min-height: 640px; }
    .float-card {
        position: absolute;
        max-width: 245px;
    }
    .float-card.card-status { left: 18px; bottom: 56px; }
    .float-card.card-backup { right: 18px; top: 72px; }
    .float-card.card-assets { right: 32px; bottom: 112px; }
    .brand-statement { padding: 72px 54px; }
    .brand-statement .statement-grid { grid-template-columns: 1fr 1fr; }
    .split-section { grid-template-columns: 1fr 1fr; gap: 52px; }
    .story-timeline { gap: 0; }
    .story-timeline::before {
        content: "";
        position: absolute;
        top: 0;
        bottom: 0;
        left: 50%;
        width: 1px;
        background: var(--line);
    }
    .timeline-item {
        width: calc(50% - 34px);
        margin-bottom: 22px;
    }
    .timeline-item:nth-child(even) { margin-left: calc(50% + 34px); }
    .chapter-index { grid-template-columns: .8fr 1.2fr; padding: 48px; }
    .chapter-item {
        grid-template-columns: 72px 1fr;
        column-gap: 22px;
        align-items: start;
    }
    .scenario-story-grid {
        grid-template-columns: 1.1fr .9fr;
    }
    .scenario-card.large { grid-row: span 2; }
    .risk-grid { grid-template-columns: repeat(2, 1fr); }
    .guide-layout { grid-template-columns: minmax(0, 1fr) 310px; }
    .guide-aside { position: sticky; top: 96px; }
    .download-steps { grid-template-columns: repeat(4, 1fr); }
    .about-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { grid-template-columns: 1fr .7fr; }
}
@media (min-width: 1040px) {
    .risk-grid { grid-template-columns: repeat(3, 1fr); }
    .scenario-story-grid { grid-template-columns: 1.1fr .9fr .9fr; }
}