:root {
    --primary: rgb(70,139,223);
    --primary-dark: #245fba;
    --ink: #13233a;
    --muted: #66758c;
    --line: rgba(70, 139, 223, .18);
    --soft: #f4f8ff;
    --soft-2: #eef5ff;
    --white: #fff;
    --shadow: 0 18px 55px rgba(33, 78, 140, .10);
    --radius-lg: 26px;
    --radius-md: 18px;
    --container: 1160px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.75;
    background:
        radial-gradient(circle at 0 0, rgba(70,139,223,.12), transparent 31rem),
        linear-gradient(180deg, #ffffff 0%, #f7fbff 48%, #ffffff 100%);
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
p { color: var(--muted); margin: 0 0 1rem; }
h1, h2, h3 { margin: 0; line-height: 1.12; letter-spacing: -0.04em; color: var(--ink); }
h1 { font-size: clamp(2.45rem, 12vw, 5.8rem); }
h2 { font-size: clamp(1.8rem, 7vw, 3.5rem); }
h3 { font-size: clamp(1.1rem, 4vw, 1.6rem); }
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,.86);
    border-bottom: 1px solid rgba(70,139,223,.10);
    backdrop-filter: blur(18px);
}
.nav-shell {
    width: min(var(--container), calc(100% - 32px));
    margin: 0 auto;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.brand { display: inline-flex; align-items: center; gap: .7rem; font-weight: 800; letter-spacing: -.02em; }
.logo { width: 38px; height: 38px; border-radius: 12px; }
.brand-text { font-size: 1.05rem; }
.nav-toggle { display: none; }
.nav-toggle-label { display: inline-flex; flex-direction: column; gap: 5px; padding: .65rem; border: 1px solid var(--line); border-radius: 14px; }
.nav-toggle-label span { width: 22px; height: 2px; background: var(--ink); display: block; }
.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 74px;
    display: none;
    padding: .8rem;
    background: rgba(255,255,255,.98);
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
}
.site-nav a { display: block; padding: .8rem 1rem; color: #36485f; border-radius: 14px; font-weight: 600; }
.site-nav a:hover { background: var(--soft); color: var(--primary-dark); }
.nav-toggle:checked ~ .site-nav { display: block; }
.section { padding: 4.5rem 0; }
.container { width: min(var(--container), calc(100% - 32px)); margin: 0 auto; }
.narrow { max-width: 820px; }
.eyebrow, .chapter-badge {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    margin-bottom: 1rem;
    color: var(--primary-dark);
    font-size: .78rem;
    font-weight: 800;
    letter-spacing: .12em;
    text-transform: uppercase;
}
.eyebrow::before, .chapter-badge::before { content: ''; width: 26px; height: 1px; background: var(--primary); display: inline-block; }
.lead { font-size: clamp(1rem, 3.5vw, 1.22rem); color: #4c5f78; max-width: 760px; }
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 0 1.45rem;
    border-radius: 999px;
    background: var(--primary);
    color: white;
    font-weight: 800;
    box-shadow: 0 12px 28px rgba(70,139,223,.24);
    transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-dark); box-shadow: 0 18px 36px rgba(70,139,223,.28); }
.magazine-hero { padding: 4.7rem 0 3.2rem; }
.hero-grid { display: grid; gap: 2.5rem; align-items: center; }
.hero-copy { display: grid; gap: 1.35rem; }
.hero-tags { display: flex; flex-wrap: wrap; gap: .7rem; }
.hero-tags span, .mini-tag { padding: .45rem .72rem; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.78); color: #40536c; font-size: .86rem; font-weight: 700; }
.product-visual {
    position: relative;
    min-height: 520px;
    border-radius: 34px;
    padding: 2rem;
    background: linear-gradient(145deg, rgba(70,139,223,.16), rgba(255,255,255,.94) 45%, rgba(70,139,223,.07));
    border: 1px solid rgba(70,139,223,.18);
    overflow: hidden;
    box-shadow: var(--shadow);
}
.product-visual::before { content: ''; position: absolute; width: 240px; height: 240px; right: -70px; top: -50px; background: rgba(70,139,223,.16); border-radius: 50%; }
.app-frame { width: min(300px, 78%); margin: 1.5rem auto 0; position: relative; z-index: 2; filter: drop-shadow(0 24px 42px rgba(30, 75, 130, .18)); }
.float-card {
    position: relative;
    z-index: 3;
    width: min(260px, 82%);
    padding: .85rem 1rem;
    background: rgba(255,255,255,.86);
    border: 1px solid rgba(70,139,223,.14);
    border-radius: 18px;
    box-shadow: 0 14px 36px rgba(33,78,140,.09);
    color: #3e526b;
    font-size: .92rem;
}
.float-card strong { display: block; color: var(--ink); margin-bottom: .1rem; }
.float-card.status { margin-left: auto; }
.float-card.backup { margin-top: -1.1rem; }
.float-card.assets { margin-left: auto; margin-top: -1rem; }
.brand-statement {
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: rgba(255,255,255,.48);
}
.statement-grid { display: grid; gap: 2rem; }
.quote-line { font-size: clamp(1.55rem, 7vw, 3.4rem); font-weight: 850; letter-spacing: -.05em; line-height: 1.12; }
.statement-copy { display: grid; gap: 1rem; }
.split-section { display: grid; gap: 1.5rem; align-items: stretch; }
.split-panel, .content-card, .guide-panel, .faq-card, .scenario-card, .risk-panel, .cta-section {
    background: rgba(255,255,255,.82);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}
.split-panel { padding: 1.5rem; }
.info-panel {
    display: grid;
    gap: 1rem;
    padding: 1.35rem;
    border-radius: 22px;
    background: linear-gradient(135deg, #edf5ff, #ffffff);
    border: 1px solid rgba(70,139,223,.16);
}
.info-row { display: flex; justify-content: space-between; gap: 1rem; padding: .82rem 0; border-bottom: 1px solid rgba(70,139,223,.12); }
.info-row:last-child { border-bottom: 0; }
.info-row b { color: var(--ink); }
.story-timeline { position: relative; display: grid; gap: 1rem; margin-top: 2rem; }
.timeline-item {
    padding: 1.2rem;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: rgba(255,255,255,.84);
    box-shadow: 0 12px 34px rgba(33, 78, 140, .07);
}
.timeline-num { font-size: .8rem; font-weight: 900; color: var(--primary-dark); letter-spacing: .16em; }
.inline-link { color: var(--primary-dark); font-weight: 800; border-bottom: 1px solid rgba(70,139,223,.35); }
.chapter-index { display: grid; gap: 2rem; align-items: start; }
.chapter-list { border-top: 1px solid var(--line); }
.chapter-row {
    display: grid;
    gap: .5rem;
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--line);
}
.chapter-row span { font-weight: 900; color: var(--primary-dark); letter-spacing: .14em; }
.chapter-row a { font-weight: 850; font-size: 1.15rem; }
.scenario-story-grid { display: grid; gap: 1rem; margin-top: 2rem; }
.scenario-card { padding: 1.25rem; }
.scenario-card.large { background: linear-gradient(135deg, #ffffff, #eef6ff); }
.risk-panel { padding: 1.5rem; background: linear-gradient(135deg, #eef6ff, #ffffff 62%); }
.risk-list { display: grid; gap: .8rem; margin-top: 1.4rem; }
.risk-item { padding: 1rem; border-radius: 18px; background: rgba(255,255,255,.72); border: 1px solid rgba(70,139,223,.14); }
.faq-list { display: grid; gap: 1rem; margin-top: 2rem; }
.faq-card { padding: 1.25rem; }
.cta-section { padding: 2rem; text-align: center; background: linear-gradient(140deg, #edf5ff, #ffffff); }
.cta-section p { margin-left: auto; margin-right: auto; max-width: 680px; }
.page-hero { padding: 4.5rem 0 2.5rem; }
.page-hero .container { display: grid; gap: 1rem; }
.guide-layout { display: grid; gap: 1.2rem; align-items: start; }
.guide-main { display: grid; gap: 1rem; }
.guide-panel { padding: 1.25rem; }
.guide-panel.blue { background: linear-gradient(135deg, #eef6ff, #ffffff); }
.step-list { counter-reset: step; display: grid; gap: .8rem; padding: 0; margin: 1rem 0 0; list-style: none; }
.step-list li { counter-increment: step; padding: 1rem; border-radius: 18px; border: 1px solid var(--line); background: #fff; }
.step-list li::before { content: counter(step, decimal-leading-zero); display: block; color: var(--primary-dark); font-weight: 900; letter-spacing: .12em; margin-bottom: .2rem; }
.check-list { padding-left: 1.1rem; color: var(--muted); }
.check-list li { margin: .45rem 0; }
.side-note { padding: 1.2rem; border-radius: var(--radius-md); background: var(--soft); border: 1px solid var(--line); }
.download-steps { display: grid; gap: 1rem; margin-top: 1.3rem; }
.download-step { padding: 1rem; border-left: 3px solid var(--primary); background: #fff; border-radius: 0 18px 18px 0; border-top: 1px solid var(--line); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.site-footer { padding: 3rem 0; background: #f3f8ff; border-top: 1px solid var(--line); }
.footer-inner { width: min(var(--container), calc(100% - 32px)); margin: 0 auto; display: grid; gap: 1.2rem; }
.footer-brand { display: flex; gap: 1rem; align-items: flex-start; }
.footer-logo { width: 42px; height: 42px; border-radius: 14px; }
.footer-links { display: flex; flex-wrap: wrap; gap: .7rem 1rem; }
.footer-links a { color: #41556e; font-weight: 700; }
.footer-note { font-size: .88rem; }
@media (min-width: 720px) {
    .scenario-story-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .risk-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .faq-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .download-steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 940px) {
    .nav-toggle-label { display: none; }
    .site-nav { position: static; display: flex; align-items: center; gap: .15rem; padding: 0; background: transparent; border: 0; box-shadow: none; }
    .site-nav a { padding: .55rem .78rem; }
    .magazine-hero { padding: 6.5rem 0 4.5rem; }
    .hero-grid { grid-template-columns: 1.05fr .95fr; gap: 4.2rem; }
    .statement-grid { grid-template-columns: .95fr 1.05fr; gap: 4rem; align-items: center; }
    .split-section { grid-template-columns: 1fr 1fr; gap: 2rem; }
    .split-section.reverse .split-panel:first-child { order: 2; }
    .story-timeline { grid-template-columns: 1fr 1fr; gap: 1.2rem 4rem; }
    .story-timeline::before { content: ''; position: absolute; top: 0; bottom: 0; left: 50%; width: 1px; background: var(--line); }
    .timeline-item:nth-child(even) { transform: translateY(2rem); }
    .chapter-index { grid-template-columns: .9fr 1.25fr; gap: 4rem; }
    .chapter-row { grid-template-columns: 92px 1fr 1.1fr; align-items: center; gap: 1rem; }
    .scenario-story-grid { grid-template-columns: 1.2fr .8fr .8fr; }
    .scenario-card.large { grid-row: span 2; min-height: 320px; }
    .guide-layout { grid-template-columns: minmax(0, 1fr) 320px; gap: 2rem; }
    .guide-main { gap: 1.2rem; }
    .section { padding: 6rem 0; }
    .footer-inner { grid-template-columns: 1.3fr .9fr; }
    .footer-note { grid-column: 1 / -1; }
}