* {
    box-sizing: border-box;
}

:root {
    --primary: rgb(70,139,223);
    --primary-strong: rgb(37,103,188);
    --primary-soft: rgba(70,139,223,.10);
    --primary-line: rgba(70,139,223,.22);
    --ink: #102033;
    --muted: #5f7188;
    --pale: #f5f9ff;
    --pale-2: #edf5ff;
    --white: #ffffff;
    --line: #dbe6f4;
    --shadow: 0 20px 60px rgba(27,74,129,.10);
    --radius: 24px;
    --container: 1160px;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    background:
        radial-gradient(circle at 18% 0%, rgba(70,139,223,.14), transparent 32rem),
        linear-gradient(180deg, #ffffff 0%, #f8fbff 42%, #ffffff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}

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

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

.skip-link {
    position: absolute;
    top: -44px;
    left: 16px;
    background: var(--primary);
    color: #fff;
    padding: 8px 12px;
    border-radius: 12px;
    z-index: 99;
}

.skip-link:focus {
    top: 12px;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255,255,255,.88);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(219,230,244,.75);
}

.nav-wrap {
    width: min(100% - 32px, var(--container));
    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: 800;
    letter-spacing: .02em;
    white-space: nowrap;
}

.brand img {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    box-shadow: 0 12px 24px rgba(70,139,223,.18);
}

.nav-toggle {
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: #fff;
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
}

.nav-toggle span {
    width: 18px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
}

.site-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 76px;
    display: none;
    padding: 14px;
    background: rgba(255,255,255,.96);
    border: 1px solid var(--line);
    border-radius: 22px;
    box-shadow: var(--shadow);
}

.site-nav.open {
    display: grid;
    gap: 4px;
}

.site-nav a {
    padding: 11px 12px;
    border-radius: 14px;
    color: var(--muted);
    font-size: 15px;
}

.site-nav a.active,
.site-nav a:hover {
    color: var(--primary-strong);
    background: var(--primary-soft);
}

.site-main {
    min-height: 66vh;
}

.content-container,
.section,
.hero-inner,
.footer-inner {
    width: min(100% - 32px, var(--container));
    margin-left: auto;
    margin-right: auto;
}

.section {
    padding: 56px 0;
}

.kicker,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-strong);
    background: rgba(70,139,223,.10);
    border: 1px solid rgba(70,139,223,.18);
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .02em;
}

h1,
h2,
h3 {
    margin: 0;
    line-height: 1.15;
    letter-spacing: -.03em;
}

h1 {
    font-size: clamp(40px, 12vw, 82px);
}

h2 {
    font-size: clamp(30px, 8vw, 56px);
}

h3 {
    font-size: clamp(22px, 6vw, 32px);
}

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

.lead {
    font-size: 18px;
    color: #40546d;
}

.download-btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 16px 34px rgba(70,139,223,.28);
    border: 1px solid rgba(70,139,223,.24);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.download-btn:hover {
    transform: translateY(-2px);
    background: var(--primary-strong);
    box-shadow: 0 18px 42px rgba(70,139,223,.34);
}

.magazine-hero {
    padding: 54px 0 36px;
    position: relative;
}

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

.hero-copy {
    display: grid;
    gap: 22px;
}

.hero-copy h1 em {
    color: var(--primary);
    font-style: normal;
}

.safety-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.safety-tags span {
    color: #2b5f9b;
    background: #fff;
    border: 1px solid var(--primary-line);
    border-radius: 999px;
    padding: 8px 12px;
    font-size: 13px;
    box-shadow: 0 10px 30px rgba(37,103,188,.06);
}

.product-visual {
    position: relative;
    min-height: 460px;
    border-radius: 34px;
    background:
        linear-gradient(145deg, rgba(70,139,223,.18), rgba(255,255,255,.92) 58%),
        radial-gradient(circle at 82% 12%, rgba(70,139,223,.30), transparent 18rem);
    border: 1px solid rgba(70,139,223,.20);
    box-shadow: var(--shadow);
    display: grid;
    place-items: center;
    overflow: hidden;
    padding: 30px;
}

.product-visual .app-shot {
    width: min(72%, 360px);
    filter: drop-shadow(0 34px 54px rgba(15,60,110,.18));
}

.float-card {
    position: absolute;
    background: rgba(255,255,255,.88);
    border: 1px solid rgba(219,230,244,.95);
    border-radius: 20px;
    padding: 14px 16px;
    box-shadow: 0 16px 40px rgba(28,75,130,.11);
    max-width: 210px;
}

.float-card strong {
    display: block;
    color: var(--ink);
    font-size: 14px;
}

.float-card small {
    display: block;
    color: var(--muted);
    line-height: 1.5;
    margin-top: 4px;
}

.float-card.one { top: 24px; left: 20px; }
.float-card.two { right: 18px; top: 44%; }
.float-card.three { left: 24px; bottom: 26px; }

.brand-statement {
    padding: 56px 0;
}

.statement-box {
    width: min(100% - 32px, var(--container));
    margin: 0 auto;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 44px 0;
    display: grid;
    gap: 22px;
}

.statement-quote {
    font-size: clamp(30px, 8vw, 58px);
    line-height: 1.15;
    color: var(--ink);
    letter-spacing: -.04em;
}

.statement-quote span {
    color: var(--primary);
}

.statement-text {
    display: grid;
    gap: 14px;
}

.story-timeline {
    position: relative;
    display: grid;
    gap: 18px;
    margin-top: 30px;
}

.timeline-item {
    position: relative;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: 0 14px 42px rgba(34,76,123,.07);
}

.timeline-item .num,
.chapter-row .num,
.number-label {
    display: inline-block;
    color: var(--primary);
    font-family: Georgia, "Times New Roman", serif;
    font-size: 22px;
    letter-spacing: .08em;
    margin-bottom: 12px;
}

.timeline-item a,
.chapter-row a,
.scenario-card a,
.link-more {
    color: var(--primary-strong);
    font-weight: 800;
    display: inline-flex;
    margin-top: 14px;
}

.split-section {
    display: grid;
    gap: 22px;
    margin-top: 28px;
}

.split-block {
    display: grid;
    gap: 22px;
    padding: 26px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 30px;
    box-shadow: var(--shadow);
}

.info-panel {
    background: linear-gradient(145deg, rgba(70,139,223,.13), rgba(255,255,255,.92));
    border: 1px solid var(--primary-line);
    border-radius: 24px;
    padding: 22px;
}

.info-panel ul,
.page-card ul,
.check-list,
.clean-list {
    margin: 14px 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 10px;
}

.info-panel li,
.page-card li,
.check-list li,
.clean-list li {
    position: relative;
    padding-left: 20px;
    color: #41566f;
}

.info-panel li::before,
.page-card li::before,
.check-list li::before,
.clean-list li::before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--primary);
    position: absolute;
    left: 0;
    top: .72em;
}

.chapter-index {
    display: grid;
    gap: 26px;
    border-radius: 34px;
    background: linear-gradient(135deg, #fff, #f2f8ff);
    border: 1px solid var(--line);
    padding: 28px;
}

.chapter-list {
    display: grid;
    gap: 0;
    border-top: 1px solid var(--line);
}

.chapter-row {
    display: grid;
    gap: 8px;
    padding: 20px 0;
    border-bottom: 1px solid var(--line);
}

.scenario-story-grid {
    display: grid;
    gap: 18px;
    margin-top: 28px;
}

.scenario-card {
    min-height: 210px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 24px;
    box-shadow: 0 14px 40px rgba(27,74,129,.07);
}

.risk-panel {
    background:
        radial-gradient(circle at 90% 20%, rgba(70,139,223,.20), transparent 24rem),
        linear-gradient(135deg, #eef6ff, #ffffff);
    border: 1px solid var(--primary-line);
    border-radius: 34px;
    padding: 28px;
    display: grid;
    gap: 24px;
}

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

.risk-item {
    background: rgba(255,255,255,.78);
    border: 1px solid rgba(70,139,223,.16);
    border-radius: 22px;
    padding: 18px;
}

.risk-item strong {
    display: block;
    margin-bottom: 6px;
}

.faq-list {
    display: grid;
    gap: 14px;
    margin-top: 26px;
}

.faq-item {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 22px;
    padding: 20px;
}

.faq-item h3 {
    font-size: 20px;
    letter-spacing: -.02em;
    margin-bottom: 8px;
}

.cta-section {
    width: min(100% - 32px, var(--container));
    margin: 28px auto 72px;
    padding: 42px 24px;
    text-align: center;
    border-radius: 34px;
    background: linear-gradient(135deg, rgba(70,139,223,.16), rgba(255,255,255,.96));
    border: 1px solid var(--primary-line);
    display: grid;
    justify-items: center;
    gap: 18px;
}

.page-hero {
    padding: 54px 0 26px;
}

.page-hero-inner {
    width: min(100% - 32px, 980px);
    margin: 0 auto;
    display: grid;
    gap: 18px;
}

.page-layout {
    width: min(100% - 32px, var(--container));
    margin: 28px auto 70px;
    display: grid;
    gap: 22px;
}

.article-flow {
    display: grid;
    gap: 18px;
}

.page-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 24px;
    box-shadow: 0 14px 42px rgba(34,76,123,.07);
}

.page-card h2 {
    font-size: clamp(25px, 7vw, 40px);
    margin-bottom: 12px;
}

.step-list {
    counter-reset: steps;
    display: grid;
    gap: 14px;
}

.step {
    counter-increment: steps;
    position: relative;
    padding: 20px 20px 20px 58px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 24px;
}

.step::before {
    content: counter(steps, decimal-leading-zero);
    position: absolute;
    left: 18px;
    top: 18px;
    color: var(--primary);
    font-family: Georgia, "Times New Roman", serif;
    font-weight: 700;
}

.side-note {
    background: linear-gradient(155deg, rgba(70,139,223,.12), #fff);
    border: 1px solid var(--primary-line);
    border-radius: 28px;
    padding: 24px;
    align-self: start;
}

.side-note h3 {
    font-size: 23px;
    margin-bottom: 12px;
}

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

.site-footer {
    background: #f3f7fc;
    border-top: 1px solid var(--line);
    padding: 34px 0;
}

.footer-inner {
    display: grid;
    gap: 24px;
}

.footer-brand {
    display: flex;
    gap: 14px;
    align-items: center;
}

.footer-brand img {
    width: 48px;
    height: 48px;
    border-radius: 16px;
}

.footer-brand p {
    margin-top: 4px;
    max-width: 620px;
}

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

.footer-links a {
    color: var(--muted);
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 999px;
    padding: 7px 12px;
    font-size: 14px;
}

.footer-links a:hover {
    color: var(--primary-strong);
    border-color: var(--primary-line);
}

@media (min-width: 720px) {
    .section {
        padding: 72px 0;
    }

    .story-timeline {
        grid-template-columns: 1fr 1fr;
        gap: 22px;
    }

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

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

    .footer-inner {
        grid-template-columns: 1fr auto;
        align-items: center;
    }
}

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

    .site-nav {
        position: static;
        display: flex;
        align-items: center;
        gap: 6px;
        padding: 0;
        background: transparent;
        border: 0;
        box-shadow: none;
        border-radius: 0;
    }

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

    .magazine-hero {
        padding: 80px 0 44px;
    }

    .hero-inner {
        grid-template-columns: minmax(0, 1.08fr) minmax(420px, .92fr);
        gap: 54px;
    }

    .statement-box {
        grid-template-columns: .95fr 1.05fr;
        gap: 52px;
        align-items: start;
        padding: 64px 0;
    }

    .split-block {
        grid-template-columns: 1fr .92fr;
        align-items: center;
        padding: 34px;
    }

    .split-block:nth-child(even) .split-copy {
        order: 2;
    }

    .chapter-index {
        grid-template-columns: .82fr 1.18fr;
        padding: 44px;
    }

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

    .scenario-card.featured {
        grid-row: span 2;
    }

    .page-layout {
        grid-template-columns: minmax(0, 1fr) 320px;
        gap: 34px;
    }

    .page-layout.narrow {
        grid-template-columns: minmax(0, 860px);
        justify-content: center;
    }

    .page-hero {
        padding-top: 78px;
    }
}

@media (max-width: 460px) {
    .content-container,
    .section,
    .hero-inner,
    .footer-inner,
    .page-layout,
    .page-hero-inner,
    .cta-section {
        width: min(100% - 24px, var(--container));
    }

    .product-visual {
        min-height: 420px;
        padding: 18px;
    }

    .product-visual .app-shot {
        width: 78%;
    }

    .float-card {
        max-width: 176px;
        padding: 11px 12px;
        border-radius: 16px;
    }

    .float-card.two {
        right: 10px;
    }

    .float-card.one,
    .float-card.three {
        left: 10px;
    }

    .download-btn {
        width: 100%;
        padding: 0 18px;
    }

    .cta-section .download-btn,
    .hero-copy .download-btn {
        width: auto;
        min-width: 176px;
    }
}