* {
    box-sizing: border-box;
}

:root {
    --primary: rgb(70,139,223);
    --primary-dark: rgb(38, 91, 163);
    --ink: #0f1d33;
    --muted: #62718a;
    --line: #dbe7f6;
    --soft: #f4f8fe;
    --soft-blue: #eaf4ff;
    --white: #ffffff;
    --shadow: 0 18px 50px rgba(32, 88, 158, 0.12);
    --radius: 24px;
}

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;
    background: linear-gradient(180deg, #f8fbff 0%, #ffffff 34%, #f2f7ff 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: 20;
    background: rgba(255,255,255,0.88);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(219,231,246,0.86);
}

.nav-shell {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    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;
}

.brand-logo {
    width: 38px;
    height: 38px;
    border-radius: 12px;
}

.brand-text {
    font-size: 18px;
}

.nav-toggle {
    border: 1px solid var(--line);
    background: var(--white);
    border-radius: 12px;
    width: 44px;
    height: 40px;
    font-size: 22px;
    color: var(--primary-dark);
}

.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    display: none;
    flex-direction: column;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255,255,255,0.96);
    box-shadow: var(--shadow);
}

.site-nav.is-open {
    display: flex;
}

.nav-link {
    padding: 10px 12px;
    color: #34435a;
    font-size: 15px;
    border-radius: 12px;
}

.nav-link.active,
.nav-link:hover {
    color: var(--primary-dark);
    background: var(--soft-blue);
}

.container {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}

.narrow-container {
    width: min(880px, calc(100% - 32px));
    margin: 0 auto;
}

.section {
    padding: 58px 0;
}

.section-kicker,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    color: var(--primary-dark);
    background: rgba(70,139,223,0.1);
    border: 1px solid rgba(70,139,223,0.18);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
}

.section-title {
    margin: 12px 0 14px;
    font-size: clamp(28px, 4vw, 48px);
    line-height: 1.12;
    letter-spacing: -0.04em;
}

.section-desc {
    max-width: 760px;
    color: var(--muted);
    font-size: 16px;
}

.magazine-hero {
    padding: 52px 0 36px;
    overflow: hidden;
}

.hero-grid {
    display: grid;
    gap: 34px;
    align-items: center;
}

.hero-copy h1 {
    margin: 18px 0 18px;
    font-size: clamp(42px, 10vw, 86px);
    line-height: 0.96;
    letter-spacing: -0.07em;
}

.hero-copy p {
    margin: 0 0 22px;
    color: var(--muted);
    font-size: 17px;
    max-width: 680px;
}

.hero-tags,
.security-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 18px 0;
}

.hero-tags span,
.security-tags span {
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255,255,255,0.8);
    color: #2d4666;
    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: 800;
    letter-spacing: 0.02em;
    box-shadow: 0 14px 32px rgba(70,139,223,0.26);
    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 38px rgba(70,139,223,0.32);
}

.product-visual {
    position: relative;
    min-height: 430px;
    display: grid;
    place-items: center;
    border-radius: 36px;
    background: linear-gradient(135deg, #ffffff 0%, #eef7ff 55%, #dcecff 100%);
    border: 1px solid rgba(70,139,223,0.16);
    box-shadow: var(--shadow);
    padding: 34px;
}

.product-visual img {
    width: min(320px, 78vw);
    border-radius: 34px;
    filter: drop-shadow(0 22px 36px rgba(38, 91, 163, 0.22));
}

.floating-card {
    position: static;
    width: 100%;
    margin-top: 12px;
    padding: 14px 16px;
    border-radius: 18px;
    background: rgba(255,255,255,0.88);
    border: 1px solid rgba(219,231,246,0.9);
    box-shadow: 0 12px 30px rgba(20,57,104,0.09);
    color: #2d4666;
    font-size: 14px;
}

.floating-card strong {
    display: block;
    color: var(--ink);
    font-size: 15px;
}

.brand-statement {
    padding: 60px 0;
}

.statement-box {
    padding: clamp(28px, 6vw, 70px);
    border-radius: 34px;
    background: linear-gradient(135deg, #f8fbff 0%, #ffffff 46%, #e7f2ff 100%);
    border: 1px solid rgba(70,139,223,0.16);
    box-shadow: var(--shadow);
}

.statement-quote {
    margin: 0 0 22px;
    font-size: clamp(30px, 5vw, 58px);
    line-height: 1.12;
    letter-spacing: -0.055em;
}

.statement-text {
    display: grid;
    gap: 18px;
    color: var(--muted);
}

.story-timeline {
    position: relative;
    display: grid;
    gap: 18px;
    margin-top: 28px;
}

.timeline-item {
    position: relative;
    padding: 22px;
    border-radius: 24px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: 0 10px 32px rgba(32,88,158,0.08);
}

.timeline-number {
    display: inline-flex;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    color: #fff;
    background: var(--primary);
    font-weight: 800;
}

.timeline-item h3 {
    margin: 14px 0 8px;
    font-size: 22px;
}

.timeline-item p {
    color: var(--muted);
    margin: 0 0 12px;
}

.text-link {
    color: var(--primary-dark);
    font-weight: 800;
    border-bottom: 1px solid rgba(70,139,223,0.35);
}

.split-section {
    display: grid;
    gap: 24px;
    align-items: center;
    margin-top: 28px;
}

.split-panel {
    padding: 28px;
    border-radius: 28px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.split-panel h3 {
    margin: 0 0 12px;
    font-size: clamp(26px, 4vw, 42px);
    line-height: 1.16;
    letter-spacing: -0.04em;
}

.split-panel p,
.info-panel p {
    color: var(--muted);
}

.info-panel {
    padding: 26px;
    border-radius: 28px;
    background: linear-gradient(145deg, #eef7ff, #ffffff);
    border: 1px solid rgba(70,139,223,0.18);
}

.info-row {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding: 14px 0;
    border-bottom: 1px solid rgba(70,139,223,0.14);
}

.info-row:last-child {
    border-bottom: none;
}

.info-row span:first-child {
    color: var(--muted);
}

.info-row span:last-child {
    color: var(--primary-dark);
    font-weight: 800;
}

.chapter-index {
    display: grid;
    gap: 28px;
    align-items: start;
}

.chapter-list {
    display: grid;
    gap: 12px;
}

.chapter-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 16px;
    padding: 18px 0;
    border-top: 1px solid var(--line);
}

.chapter-num {
    color: var(--primary);
    font-weight: 900;
    letter-spacing: -0.04em;
    font-size: 24px;
}

.chapter-item h3 {
    margin: 0 0 4px;
    font-size: 20px;
}

.chapter-item p {
    margin: 0 0 8px;
    color: var(--muted);
}

.scenario-story-grid {
    display: grid;
    gap: 16px;
    margin-top: 26px;
}

.scenario-card {
    min-height: 220px;
    padding: 24px;
    border-radius: 28px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: 0 12px 34px rgba(32,88,158,0.08);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.scenario-card h3 {
    margin: 0 0 8px;
    font-size: 23px;
}

.scenario-card p {
    color: var(--muted);
}

.risk-panel {
    padding: clamp(24px, 5vw, 54px);
    border-radius: 34px;
    background: linear-gradient(135deg, #eaf4ff 0%, #f8fbff 55%, #ffffff 100%);
    border: 1px solid rgba(70,139,223,0.18);
}

.risk-grid {
    display: grid;
    gap: 14px;
    margin-top: 24px;
}

.risk-item {
    padding: 18px;
    border-radius: 20px;
    background: rgba(255,255,255,0.8);
    border: 1px solid rgba(70,139,223,0.14);
}

.risk-item h3 {
    margin: 0 0 6px;
    font-size: 18px;
}

.risk-item p {
    margin: 0;
    color: var(--muted);
}

.faq-list {
    display: grid;
    gap: 14px;
    margin-top: 28px;
}

.faq-item {
    padding: 22px;
    border-radius: 22px;
    background: #fff;
    border: 1px solid var(--line);
}

.faq-item h3 {
    margin: 0 0 8px;
    font-size: 19px;
}

.faq-item p {
    margin: 0;
    color: var(--muted);
}

.cta-section {
    text-align: center;
    padding: clamp(34px, 6vw, 70px);
    border-radius: 34px;
    background: linear-gradient(135deg, #ffffff 0%, #eef7ff 100%);
    border: 1px solid rgba(70,139,223,0.16);
    box-shadow: var(--shadow);
}

.cta-section h2 {
    margin: 0 0 12px;
    font-size: clamp(28px, 5vw, 52px);
    line-height: 1.12;
    letter-spacing: -0.05em;
}

.cta-section p {
    max-width: 680px;
    margin: 0 auto 22px;
    color: var(--muted);
}

.page-hero {
    padding: 58px 0 34px;
}

.page-hero h1 {
    margin: 16px 0 16px;
    font-size: clamp(38px, 7vw, 70px);
    line-height: 1.02;
    letter-spacing: -0.06em;
}

.page-hero p {
    color: var(--muted);
    max-width: 780px;
    font-size: 17px;
}

.article-layout {
    display: grid;
    gap: 24px;
    align-items: start;
}

.article-main,
.article-aside,
.download-card {
    border: 1px solid var(--line);
    background: rgba(255,255,255,0.86);
    border-radius: 28px;
    box-shadow: 0 12px 34px rgba(32,88,158,0.08);
}

.article-main {
    padding: clamp(24px, 5vw, 46px);
}

.article-main h2 {
    margin-top: 0;
    font-size: clamp(26px, 4vw, 38px);
    line-height: 1.18;
    letter-spacing: -0.03em;
}

.article-main p {
    color: #4d5f78;
}

.article-aside {
    padding: 22px;
}

.article-aside h3 {
    margin-top: 0;
}

.note-box,
.checklist,
.steps-box {
    margin: 22px 0;
    padding: 20px;
    border-radius: 22px;
    background: var(--soft-blue);
    border: 1px solid rgba(70,139,223,0.18);
}

.checklist ul,
.steps-box ol,
.article-aside ul {
    padding-left: 20px;
    margin: 10px 0 0;
    color: var(--muted);
}

.download-card {
    padding: clamp(24px, 5vw, 44px);
    text-align: center;
}

.download-steps {
    display: grid;
    gap: 14px;
    margin: 24px 0;
    text-align: left;
}

.download-step {
    padding: 18px;
    border-radius: 20px;
    background: var(--soft);
    border: 1px solid var(--line);
}

.download-step strong {
    color: var(--primary-dark);
}

.site-footer {
    margin-top: 60px;
    padding: 46px 0 28px;
    background: #f6faff;
    border-top: 1px solid var(--line);
}

.footer-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    display: grid;
    gap: 22px;
}

.footer-brand {
    font-size: 22px;
    font-weight: 900;
    margin-bottom: 8px;
}

.footer-inner p {
    color: var(--muted);
    max-width: 620px;
}

.footer-links {
    display: grid;
    gap: 10px;
}

.footer-links a {
    color: var(--primary-dark);
    font-weight: 700;
}

.footer-bottom {
    width: min(1180px, calc(100% - 32px));
    margin: 24px auto 0;
    padding-top: 20px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 13px;
}

@media (min-width: 720px) {
    .statement-text {
        grid-template-columns: 1fr 1fr;
    }
    .scenario-story-grid,
    .risk-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .download-steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 960px) {
    .nav-toggle {
        display: none;
    }
    .site-nav {
        position: static;
        display: flex;
        flex-direction: row;
        align-items: center;
        padding: 0;
        border: none;
        border-radius: 0;
        box-shadow: none;
        background: transparent;
    }
    .hero-grid {
        grid-template-columns: minmax(0, 1.08fr) minmax(380px, 0.92fr);
    }
    .product-visual {
        min-height: 560px;
    }
    .floating-card {
        position: absolute;
        width: 210px;
        margin-top: 0;
    }
    .floating-card.status {
        left: -18px;
        top: 74px;
    }
    .floating-card.backup {
        right: -22px;
        top: 190px;
    }
    .floating-card.asset {
        left: 42px;
        bottom: 56px;
    }
    .story-timeline {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .timeline-item:nth-child(even) {
        transform: translateY(34px);
    }
    .split-section {
        grid-template-columns: 1fr 1fr;
    }
    .split-section.reverse .split-panel {
        order: 2;
    }
    .split-section.reverse .info-panel {
        order: 1;
    }
    .chapter-index {
        grid-template-columns: 0.8fr 1.2fr;
    }
    .scenario-story-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .article-layout {
        grid-template-columns: minmax(0, 1fr) 300px;
    }
    .footer-inner {
        grid-template-columns: 1fr 320px;
    }
}