:root {
    --brand: rgb(70,139,223);
    --brand-dark: #1d4f93;
    --ink: #122033;
    --muted: #64748b;
    --line: #dce7f5;
    --soft: #f3f8ff;
    --soft-2: #eef6ff;
    --white: #ffffff;
    --panel: rgba(255,255,255,.82);
    --shadow: 0 18px 50px rgba(22, 59, 108, .10);
    --radius: 22px;
    --max: 1160px;
}

* {
    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:
        radial-gradient(circle at 10% 0%, rgba(70,139,223,.13), transparent 30rem),
        linear-gradient(180deg, #f8fbff 0%, #ffffff 28%, #f5f9ff 100%);
    line-height: 1.78;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

main {
    min-height: 60vh;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255,255,255,.86);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(220,231,245,.9);
}

.nav-wrap {
    width: min(100% - 32px, var(--max));
    margin: 0 auto;
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.brand,
.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 760;
    letter-spacing: .02em;
}

.logo-img,
.footer-logo {
    width: 36px;
    height: 36px;
    object-fit: contain;
}

.brand-text {
    white-space: nowrap;
}

.nav-toggle {
    border: 1px solid var(--line);
    background: var(--white);
    border-radius: 999px;
    padding: 8px 14px;
    color: var(--ink);
    font-weight: 700;
    cursor: pointer;
}

.site-nav {
    position: absolute;
    top: 72px;
    left: 16px;
    right: 16px;
    display: none;
    grid-template-columns: 1fr;
    gap: 4px;
    background: rgba(255,255,255,.96);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 10px;
    box-shadow: var(--shadow);
}

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

.site-nav a {
    padding: 11px 12px;
    border-radius: 12px;
    color: #38506d;
    font-weight: 640;
}

.site-nav a:hover {
    background: var(--soft);
    color: var(--brand-dark);
}

.container,
.content-container {
    width: min(100% - 32px, var(--max));
    margin: 0 auto;
}

.section {
    padding: 58px 0;
}

.section-tight {
    padding: 36px 0;
}

.eyebrow,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--brand-dark);
    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: 760;
    letter-spacing: .06em;
}

.kicker {
    color: var(--brand);
    font-weight: 800;
    letter-spacing: .16em;
    text-transform: uppercase;
    font-size: 12px;
}

h1, h2, h3 {
    line-height: 1.18;
    margin: 0 0 18px;
    letter-spacing: -.035em;
}

h1 {
    font-size: clamp(38px, 9vw, 78px);
}

h2 {
    font-size: clamp(30px, 6vw, 52px);
}

h3 {
    font-size: clamp(22px, 4vw, 30px);
}

p {
    margin: 0 0 16px;
    color: #52677f;
}

.lead {
    font-size: clamp(17px, 3vw, 22px);
    color: #42566f;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 13px 22px;
    border-radius: 999px;
    background: var(--brand);
    color: var(--white);
    font-weight: 800;
    box-shadow: 0 14px 28px rgba(70,139,223,.24);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    border: 0;
    white-space: nowrap;
}

.download-btn:hover {
    transform: translateY(-2px);
    background: #3f82d8;
    box-shadow: 0 18px 34px rgba(70,139,223,.28);
}

.magazine-hero {
    padding: 56px 0 40px;
}

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

.hero-copy {
    max-width: 760px;
}

.hero-copy .lead {
    max-width: 670px;
}

.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 24px 0 28px;
}

.security-tag {
    padding: 7px 12px;
    border-radius: 999px;
    background: var(--white);
    border: 1px solid var(--line);
    color: #38506d;
    font-size: 13px;
    font-weight: 700;
}

.product-visual {
    position: relative;
    min-height: 450px;
    border-radius: 32px;
    padding: 28px;
    background:
        linear-gradient(135deg, rgba(70,139,223,.18), rgba(255,255,255,.88)),
        radial-gradient(circle at 80% 10%, rgba(70,139,223,.22), transparent 18rem);
    border: 1px solid rgba(70,139,223,.16);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.product-visual::after {
    content: "";
    position: absolute;
    inset: auto -30% -40% 12%;
    height: 210px;
    background: rgba(70,139,223,.10);
    transform: rotate(-7deg);
    border-radius: 999px;
}

.product-phone {
    position: relative;
    z-index: 2;
    width: min(250px, 68vw);
    margin: 18px auto 0;
    filter: drop-shadow(0 26px 36px rgba(28, 69, 121, .16));
}

.status-card {
    position: relative;
    z-index: 3;
    width: min(220px, 86%);
    background: rgba(255,255,255,.90);
    border: 1px solid rgba(220,231,245,.9);
    box-shadow: 0 16px 30px rgba(31, 78, 135, .12);
    border-radius: 18px;
    padding: 14px;
    color: #38506d;
    font-size: 14px;
}

.status-card strong {
    display: block;
    color: var(--ink);
    margin-bottom: 4px;
}

.status-card.one {
    margin-left: 0;
}

.status-card.two {
    margin: -10px 0 0 auto;
}

.status-card.three {
    margin: -4px auto 0 10px;
}

.brand-statement {
    position: relative;
    overflow: hidden;
}

.statement-box {
    border-radius: 32px;
    padding: 30px;
    background: linear-gradient(135deg, #ffffff, #eef6ff);
    border: 1px solid rgba(70,139,223,.16);
    box-shadow: var(--shadow);
}

.statement-quote {
    font-size: clamp(28px, 6vw, 56px);
    line-height: 1.12;
    letter-spacing: -.04em;
    color: #162b48;
    margin: 10px 0 22px;
}

.statement-grid,
.split-section,
.two-column,
.page-layout {
    display: grid;
    gap: 24px;
}

.statement-note,
.info-panel,
.tip-panel,
.side-card {
    background: rgba(255,255,255,.78);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
}

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

.timeline-item {
    display: grid;
    gap: 12px;
    background: rgba(255,255,255,.84);
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 22px;
    box-shadow: 0 10px 28px rgba(25, 70, 126, .06);
}

.timeline-number,
.chapter-number,
.step-number {
    color: var(--brand);
    font-weight: 900;
    letter-spacing: .12em;
    font-size: 13px;
}

.text-link {
    color: var(--brand-dark);
    font-weight: 800;
    border-bottom: 1px solid rgba(70,139,223,.32);
}

.gradient-block {
    background: linear-gradient(135deg, rgba(70,139,223,.12), rgba(255,255,255,.94));
    border: 1px solid rgba(70,139,223,.16);
    border-radius: 30px;
    padding: 28px;
}

.info-panel {
    background:
        linear-gradient(180deg, rgba(255,255,255,.95), rgba(244,249,255,.95));
}

.metric-row {
    display: grid;
    gap: 12px;
    margin-top: 18px;
}

.metric {
    border-left: 3px solid var(--brand);
    padding: 8px 0 8px 14px;
}

.metric b {
    display: block;
    color: var(--ink);
}

.chapter-index {
    display: grid;
    gap: 26px;
    align-items: start;
}

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

.chapter-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 14px;
    padding: 18px 0;
    border-top: 1px solid var(--line);
}

.chapter-item h3 {
    font-size: 21px;
    margin-bottom: 6px;
}

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

.scenario-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 22px;
    box-shadow: 0 12px 32px rgba(31, 78, 135, .07);
}

.scenario-card.large {
    background: linear-gradient(135deg, #ffffff, #f1f7ff);
}

.risk-panel {
    background: linear-gradient(135deg, rgba(70,139,223,.13), rgba(255,255,255,.9));
    border: 1px solid rgba(70,139,223,.18);
    border-radius: 32px;
    padding: 28px;
}

.risk-grid,
.faq-grid,
.card-grid,
.check-grid {
    display: grid;
    gap: 14px;
}

.risk-item,
.faq-item,
.guide-card,
.check-item {
    background: rgba(255,255,255,.84);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 18px;
}

.risk-item strong,
.check-item strong,
.faq-item strong {
    color: var(--ink);
    display: block;
    margin-bottom: 6px;
}

.faq-item h3 {
    font-size: 21px;
    margin-bottom: 8px;
}

.cta-section {
    text-align: center;
}

.cta-card {
    width: min(100%, 860px);
    margin: 0 auto;
    border-radius: 34px;
    padding: 34px 24px;
    background: linear-gradient(135deg, #ffffff, #eaf4ff);
    border: 1px solid rgba(70,139,223,.16);
    box-shadow: var(--shadow);
}

.page-hero {
    padding: 58px 0 26px;
}

.page-hero-inner {
    width: min(100% - 32px, 980px);
    margin: 0 auto;
}

.page-hero p {
    max-width: 760px;
}

.article-body {
    background: rgba(255,255,255,.86);
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 24px;
    box-shadow: 0 14px 36px rgba(31, 78, 135, .06);
}

.article-body h2 {
    font-size: clamp(25px, 4vw, 38px);
    margin-top: 8px;
}

.article-body ul,
.article-body ol {
    padding-left: 20px;
    color: #52677f;
}

.article-body li {
    margin: 8px 0;
}

.side-card {
    align-self: start;
    position: relative;
}

.step-list {
    display: grid;
    gap: 14px;
    margin: 22px 0;
}

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

.download-single {
    margin-top: 24px;
}

.site-footer {
    margin-top: 50px;
    background: #eef5ff;
    border-top: 1px solid var(--line);
}

.footer-inner {
    width: min(100% - 32px, var(--max));
    margin: 0 auto;
    padding: 36px 0 22px;
    display: grid;
    gap: 24px;
}

.footer-inner p {
    max-width: 620px;
    margin-top: 12px;
}

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

.footer-links a {
    color: #38506d;
    font-weight: 700;
}

.footer-bottom {
    width: min(100% - 32px, var(--max));
    margin: 0 auto;
    padding: 18px 0 26px;
    border-top: 1px solid rgba(70,139,223,.14);
    color: #6b7f97;
    font-size: 14px;
}

@media (min-width: 720px) {
    .section {
        padding: 78px 0;
    }

    .hero-grid,
    .split-section,
    .two-column,
    .statement-grid,
    .page-layout {
        grid-template-columns: 1.05fr .95fr;
        align-items: center;
    }

    .page-layout {
        grid-template-columns: minmax(0, 1fr) 320px;
        align-items: start;
    }

    .statement-box,
    .gradient-block,
    .risk-panel {
        padding: 42px;
    }

    .scenario-story-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .scenario-card.large {
        grid-column: span 2;
    }

    .risk-grid,
    .faq-grid,
    .card-grid,
    .check-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .metric-row {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .footer-inner {
        grid-template-columns: 1fr 320px;
    }
}

@media (min-width: 960px) {
    .nav-toggle {
        display: none;
    }

    .site-nav {
        position: static;
        display: flex;
        align-items: center;
        gap: 2px;
        border: 0;
        box-shadow: none;
        background: transparent;
        padding: 0;
    }

    .site-nav a {
        padding: 9px 12px;
        font-size: 15px;
    }

    .magazine-hero {
        padding: 86px 0 66px;
    }

    .hero-grid {
        grid-template-columns: 1.08fr .92fr;
        gap: 46px;
    }

    .product-visual {
        min-height: 560px;
        padding: 34px;
    }

    .product-phone {
        width: 285px;
    }

    .status-card.one {
        margin-left: 8px;
    }

    .status-card.two {
        margin-top: -18px;
        margin-right: 6px;
    }

    .status-card.three {
        margin-top: -12px;
        margin-left: 28px;
    }

    .story-timeline {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 24px;
    }

    .timeline-item:nth-child(even) {
        transform: translateY(28px);
    }

    .chapter-index {
        grid-template-columns: 360px minmax(0, 1fr);
        gap: 58px;
    }

    .scenario-story-grid {
        grid-template-columns: 1.2fr .8fr .8fr;
    }

    .scenario-card.large {
        grid-column: span 1;
        grid-row: span 2;
    }

    .article-body {
        padding: 38px;
    }
}

@media (max-width: 420px) {
    .container,
    .content-container,
    .page-hero-inner,
    .footer-inner,
    .footer-bottom {
        width: min(100% - 24px, var(--max));
    }

    .download-btn {
        width: 100%;
    }

    .chapter-item {
        grid-template-columns: 1fr;
    }

    .product-visual {
        min-height: 390px;
        padding: 18px;
    }

    .status-card {
        font-size: 13px;
    }
}