:root {
    --primary: rgb(70,139,223);
    --primary-dark: #1e5fa9;
    --primary-soft: #eaf4ff;
    --ink: #162336;
    --muted: #66758a;
    --line: #d9e6f5;
    --panel: #f7fbff;
    --white: #ffffff;
    --shadow: 0 18px 50px rgba(29, 73, 121, 0.10);
    --radius: 22px;
}
* { box-sizing: border-box; }
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(--ink);
    background: linear-gradient(180deg, #ffffff 0%, #f5faff 48%, #ffffff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
p { color: var(--muted); margin: 0 0 18px; }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255,255,255,0.92);
    border-bottom: 1px solid rgba(216, 230, 246, 0.85);
    backdrop-filter: blur(18px);
}
.nav-shell {
    width: min(1180px, calc(100% - 36px));
    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: 760; letter-spacing: .02em; }
.brand-logo { width: 38px; height: 38px; border-radius: 12px; object-fit: cover; }
.brand-text { font-size: 17px; color: #10233d; }
.nav-toggle { display: none; }
.nav-toggle-label { width: 42px; height: 42px; display: grid; place-content: center; gap: 5px; cursor: pointer; border: 1px solid var(--line); border-radius: 14px; }
.nav-toggle-label span { width: 18px; height: 2px; display: block; background: var(--ink); border-radius: 99px; }
.site-nav {
    position: absolute;
    top: 72px;
    left: 18px;
    right: 18px;
    display: none;
    flex-direction: column;
    gap: 8px;
    padding: 14px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 20px;
    box-shadow: var(--shadow);
}
.site-nav a { padding: 10px 12px; border-radius: 12px; color: #405269; font-size: 14px; }
.site-nav a.active, .site-nav a:hover { color: var(--primary-dark); background: var(--primary-soft); }
.nav-toggle:checked ~ .site-nav { display: flex; }
.content-container, .section {
    width: min(1120px, calc(100% - 36px));
    margin: 0 auto;
}
.section { padding: 58px 0; }
.section-kicker, .eyebrow, .chapter-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    border: 1px solid rgba(70,139,223,.22);
    border-radius: 999px;
    color: var(--primary-dark);
    background: rgba(234,244,255,.78);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .04em;
}
.section-title { margin: 16px 0 14px; font-size: clamp(28px, 5vw, 54px); line-height: 1.1; letter-spacing: -0.04em; }
.section-lead { max-width: 760px; font-size: 17px; }
.magazine-hero {
    width: min(1180px, calc(100% - 36px));
    margin: 0 auto;
    padding: 64px 0 50px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 38px;
    align-items: center;
}
.hero-copy h1 { margin: 18px 0 18px; font-size: clamp(38px, 11vw, 82px); line-height: .98; letter-spacing: -0.065em; }
.hero-copy .lead { font-size: 18px; max-width: 720px; color: #52647b; }
.security-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 28px 0; }
.security-tags span { padding: 9px 12px; border: 1px solid var(--line); border-radius: 999px; background: #fff; color: #31445c; font-size: 13px; }
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 760;
    letter-spacing: .02em;
    box-shadow: 0 12px 28px rgba(70,139,223,.28);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-dark); box-shadow: 0 18px 34px rgba(70,139,223,.34); }
.product-visual {
    position: relative;
    min-height: 520px;
    padding: 26px;
    border-radius: 32px;
    background: radial-gradient(circle at 30% 10%, rgba(70,139,223,.28), transparent 28%), linear-gradient(135deg, #f7fbff 0%, #e8f3ff 100%);
    border: 1px solid rgba(70,139,223,.18);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.product-visual .app-image { width: min(320px, 86%); margin: 28px auto 0; filter: drop-shadow(0 22px 35px rgba(19,50,91,.18)); }
.status-card {
    position: absolute;
    width: min(230px, 72%);
    padding: 14px 16px;
    background: rgba(255,255,255,.88);
    border: 1px solid rgba(255,255,255,.75);
    border-radius: 18px;
    box-shadow: 0 16px 38px rgba(38,83,131,.12);
    backdrop-filter: blur(10px);
}
.status-card strong { display: block; color: #17385d; margin-bottom: 4px; }
.status-card span { color: var(--muted); font-size: 13px; }
.status-card.one { left: 18px; top: 22px; }
.status-card.two { right: 18px; top: 138px; }
.status-card.three { left: 24px; bottom: 28px; }
.brand-statement {
    width: min(1120px, calc(100% - 36px));
    margin: 0 auto;
    padding: 46px 28px;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}
.statement-line { font-size: clamp(28px, 6vw, 58px); line-height: 1.08; letter-spacing: -0.05em; color: #172a43; margin: 14px 0 22px; }
.statement-grid { display: grid; gap: 20px; }
.split-section {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    align-items: center;
    padding: 32px;
    border-radius: 30px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    margin: 26px 0;
}
.split-panel {
    padding: 24px;
    border-radius: 24px;
    background: linear-gradient(145deg, #eef7ff 0%, #ffffff 100%);
    border: 1px solid rgba(70,139,223,.17);
}
.panel-row { display: flex; justify-content: space-between; gap: 16px; padding: 14px 0; border-bottom: 1px solid rgba(102,117,138,.16); }
.panel-row:last-child { border-bottom: 0; }
.panel-row span { color: var(--muted); }
.story-timeline { position: relative; display: grid; gap: 18px; margin-top: 28px; }
.timeline-item {
    display: grid;
    gap: 12px;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 24px;
    background: rgba(255,255,255,.88);
    box-shadow: 0 12px 28px rgba(41,88,139,.07);
}
.timeline-num { color: var(--primary); font-weight: 800; letter-spacing: .08em; }
.timeline-item h3 { margin: 0; font-size: 22px; }
.text-link { color: var(--primary-dark); font-weight: 700; }
.chapter-index {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 34px;
    border-radius: 32px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.chapter-list { display: grid; gap: 0; }
.chapter-link {
    display: grid;
    grid-template-columns: 52px 1fr;
    gap: 14px;
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
}
.chapter-link:last-child { border-bottom: 0; }
.chapter-link .num { font-size: 14px; color: var(--primary); font-weight: 800; }
.chapter-link h3 { margin: 0 0 4px; font-size: 20px; }
.scenario-story-grid { display: grid; grid-template-columns: 1fr; gap: 18px; margin-top: 28px; }
.scenario-card {
    padding: 24px;
    border-radius: 26px;
    background: #fff;
    border: 1px solid var(--line);
    min-height: 210px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: 0 10px 26px rgba(30,84,135,.06);
}
.scenario-card h3 { margin: 10px 0 8px; font-size: 22px; }
.risk-panel {
    padding: 34px;
    border-radius: 32px;
    background: linear-gradient(135deg, #eaf4ff 0%, #f8fbff 100%);
    border: 1px solid rgba(70,139,223,.20);
}
.risk-grid { display: grid; grid-template-columns: 1fr; gap: 14px; margin-top: 22px; }
.risk-item { padding: 18px; background: rgba(255,255,255,.76); border: 1px solid rgba(70,139,223,.14); border-radius: 20px; }
.risk-item strong { display: block; margin-bottom: 6px; color: #17385d; }
.faq-list { display: grid; gap: 14px; margin-top: 24px; }
.faq-item, .info-card, .notice-card, .check-card {
    padding: 22px;
    border-radius: 24px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: 0 10px 26px rgba(29, 73, 121, 0.06);
}
.faq-item h3 { margin: 0 0 8px; font-size: 20px; }
.cta-section {
    width: min(1120px, calc(100% - 36px));
    margin: 36px auto 78px;
    text-align: center;
    padding: 42px 24px;
    border-radius: 34px;
    background: linear-gradient(135deg, #f5faff 0%, #e8f3ff 100%);
    border: 1px solid rgba(70,139,223,.20);
}
.cta-section p { max-width: 720px; margin-left: auto; margin-right: auto; }
.page-hero {
    width: min(980px, calc(100% - 36px));
    margin: 0 auto;
    padding: 62px 0 30px;
}
.page-hero h1 { margin: 18px 0 16px; font-size: clamp(34px, 8vw, 68px); line-height: 1.02; letter-spacing: -0.06em; }
.page-layout {
    width: min(1120px, calc(100% - 36px));
    margin: 0 auto 76px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}
.article-panel { padding: 28px; background: #fff; border: 1px solid var(--line); border-radius: 30px; box-shadow: var(--shadow); }
.article-panel h2 { margin: 26px 0 10px; font-size: 26px; letter-spacing: -0.02em; }
.article-panel h2:first-child { margin-top: 0; }
.article-panel ul, .article-panel ol { padding-left: 22px; color: var(--muted); }
.article-panel li { margin: 8px 0; }
.side-panel { display: grid; gap: 16px; align-content: start; }
.step-list { counter-reset: steps; display: grid; gap: 14px; margin: 22px 0; }
.step-card { position: relative; padding: 18px 18px 18px 58px; border: 1px solid var(--line); border-radius: 20px; background: var(--panel); }
.step-card::before { counter-increment: steps; content: counter(steps, decimal-leading-zero); position: absolute; left: 18px; top: 18px; color: var(--primary); font-weight: 850; }
.download-wrap { margin-top: 28px; }
.site-footer { border-top: 1px solid var(--line); background: #fff; }
.footer-shell { width: min(1120px, calc(100% - 36px)); margin: 0 auto; padding: 34px 0; display: grid; gap: 22px; }
.footer-brand { font-weight: 800; font-size: 19px; margin-bottom: 8px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 12px; }
.footer-links a { padding: 8px 12px; border-radius: 999px; background: var(--primary-soft); color: var(--primary-dark); font-size: 13px; }
@media (min-width: 760px) {
    .magazine-hero { padding-top: 84px; }
    .statement-grid { grid-template-columns: 1.15fr .85fr; }
    .scenario-story-grid { grid-template-columns: repeat(2, 1fr); }
    .risk-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-shell { grid-template-columns: 1fr auto; align-items: center; }
}
@media (min-width: 980px) {
    .nav-toggle-label { display: none; }
    .site-nav { position: static; display: flex; flex-direction: row; padding: 0; border: 0; box-shadow: none; background: transparent; }
    .site-nav a { padding: 8px 12px; }
    .magazine-hero { grid-template-columns: 1.04fr .96fr; min-height: 720px; }
    .product-visual { min-height: 600px; }
    .split-section { grid-template-columns: 1fr 1fr; padding: 42px; }
    .story-timeline { grid-template-columns: 1fr 1fr; gap: 22px 34px; }
    .timeline-item:nth-child(even) { transform: translateY(36px); }
    .chapter-index { grid-template-columns: .78fr 1.22fr; padding: 46px; }
    .scenario-story-grid { grid-template-columns: 1.2fr .8fr .8fr; }
    .scenario-card:first-child { grid-row: span 2; min-height: 430px; }
    .page-layout { grid-template-columns: minmax(0, 1fr) 310px; align-items: start; }
    .article-panel { padding: 42px; }
}
@media (max-width: 420px) {
    .content-container, .section, .magazine-hero, .brand-statement, .cta-section, .page-hero, .page-layout, .footer-shell { width: min(100% - 28px, 1120px); }
    .product-visual { min-height: 470px; padding: 18px; }
    .status-card { position: relative; left: auto !important; right: auto !important; top: auto !important; bottom: auto !important; width: 100%; margin: 10px 0; }
    .product-visual .app-image { margin: 16px auto; }
    .split-section, .chapter-index, .risk-panel { padding: 22px; }
    .download-btn { width: 100%; }
}