:root {
    --primary: rgb(70,139,223);
    --primary-dark: #1f5fae;
    --primary-soft: #eaf4ff;
    --ink: #142033;
    --muted: #5f6f86;
    --line: #dbe8f5;
    --surface: #ffffff;
    --soft-bg: #f6faff;
    --panel: rgba(255,255,255,.78);
    --shadow: 0 18px 45px rgba(38, 91, 150, .12);
    --radius: 22px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: var(--ink);
    background: linear-gradient(180deg, #f5fbff 0%, #ffffff 36%, #f8fbff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}

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

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

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255,255,255,.92);
    border-bottom: 1px solid rgba(219,232,245,.85);
    backdrop-filter: blur(16px);
}

.header-inner {
    min-height: 68px;
    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;
}

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

.brand-text {
    font-size: 1.08rem;
}

.nav-toggle {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.nav-toggle-label {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    border: 1px solid var(--line);
    display: grid;
    place-content: center;
    gap: 5px;
    background: #fff;
}

.nav-toggle-label span {
    width: 20px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
}

.site-nav {
    position: absolute;
    top: 68px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 14px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
}

.nav-toggle:checked ~ .site-nav {
    display: flex;
}

.site-nav a {
    padding: 10px 12px;
    border-radius: 12px;
    color: var(--muted);
    font-size: .95rem;
    font-weight: 650;
}

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

.section {
    padding: 54px 0;
}

.section-head {
    max-width: 760px;
    margin-bottom: 26px;
}

.section-eyebrow,
.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 999px;
    color: var(--primary-dark);
    background: var(--primary-soft);
    border: 1px solid rgba(70,139,223,.16);
    font-weight: 750;
    font-size: .84rem;
}

h1,
h2,
h3 {
    line-height: 1.25;
    margin: 0 0 14px;
    color: #10213a;
}

h1 {
    font-size: clamp(2rem, 7vw, 4rem);
    letter-spacing: -0.05em;
}

h2 {
    font-size: clamp(1.6rem, 5vw, 2.45rem);
    letter-spacing: -0.035em;
}

h3 {
    font-size: 1.15rem;
}

p {
    margin: 0 0 14px;
    color: var(--muted);
}

.hero {
    position: relative;
    overflow: hidden;
    padding: 52px 0 44px;
    background:
        radial-gradient(circle at 12% 10%, rgba(70,139,223,.18), transparent 32%),
        linear-gradient(135deg, #f5fbff 0%, #ffffff 46%, #eaf4ff 100%);
}

.hero::after {
    content: "";
    position: absolute;
    inset: auto -120px -220px auto;
    width: 360px;
    height: 360px;
    background: rgba(70,139,223,.15);
    border-radius: 50%;
    filter: blur(8px);
}

.hero-layout {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 30px;
    align-items: center;
}

.hero-copy {
    max-width: 720px;
}

.hero-copy p {
    font-size: 1.05rem;
}

.hero-tags,
.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0 24px;
}

.tag,
.mini-tag {
    display: inline-flex;
    align-items: center;
    padding: 7px 11px;
    border-radius: 999px;
    background: rgba(255,255,255,.86);
    border: 1px solid var(--line);
    color: #35506f;
    font-size: .86rem;
    font-weight: 650;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 14px 26px rgba(70,139,223,.28);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    cursor: pointer;
}

.download-btn:hover {
    transform: translateY(-2px);
    background: var(--primary-dark);
    box-shadow: 0 18px 32px rgba(70,139,223,.34);
}

.hero-visual {
    position: relative;
    min-height: 420px;
    display: grid;
    place-items: center;
}

.app-frame {
    width: min(260px, 74vw);
    padding: 14px;
    border-radius: 34px;
    background: linear-gradient(180deg, #ffffff, #edf6ff);
    border: 1px solid rgba(70,139,223,.14);
    box-shadow: 0 30px 80px rgba(38, 91, 150, .2);
}

.app-frame img {
    border-radius: 25px;
}

.float-card,
.security-status-card,
.asset-card,
.risk-card {
    position: absolute;
    background: rgba(255,255,255,.92);
    border: 1px solid rgba(219,232,245,.94);
    box-shadow: var(--shadow);
    border-radius: 18px;
    padding: 14px 15px;
    backdrop-filter: blur(14px);
}

.security-status-card {
    top: 10px;
    left: 0;
    max-width: 205px;
}

.asset-card {
    right: 0;
    bottom: 72px;
    max-width: 205px;
}

.risk-card {
    left: 8px;
    bottom: 10px;
    max-width: 218px;
}

.float-title {
    color: #10213a;
    font-weight: 820;
    margin-bottom: 3px;
}

.status-dot {
    width: 10px;
    height: 10px;
    display: inline-block;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 6px rgba(70,139,223,.13);
    margin-right: 8px;
}

.metric-strip {
    display: grid;
    gap: 14px;
    margin-top: 26px;
}

.metric-item {
    padding: 18px;
    border-radius: 20px;
    background: rgba(255,255,255,.82);
    border: 1px solid var(--line);
}

.metric-item strong {
    display: block;
    color: #10213a;
    font-size: 1.05rem;
    margin-bottom: 3px;
}

.category-grid,
.feature-grid,
.scenario-grid,
.recommend-grid,
.page-grid,
.help-grid {
    display: grid;
    gap: 16px;
}

.category-card,
.feature-card,
.scenario-card,
.recommend-card,
.info-card,
.note-card,
.faq-item,
.step-card,
.process-step {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: 0 12px 30px rgba(38, 91, 150, .08);
}

.category-card {
    display: grid;
    gap: 9px;
    min-height: 164px;
    transition: transform .2s ease, border-color .2s ease;
}

.category-card:hover {
    transform: translateY(-3px);
    border-color: rgba(70,139,223,.38);
}

.card-icon {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    background: var(--primary-soft);
    color: var(--primary-dark);
    font-weight: 900;
}

.link-more {
    color: var(--primary-dark);
    font-weight: 760;
    margin-top: auto;
}

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

.step-card,
.process-step {
    position: relative;
    overflow: hidden;
}

.step-card::before,
.process-step::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    display: inline-grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 14px;
    margin-bottom: 12px;
    color: #fff;
    background: var(--primary);
    font-weight: 850;
}

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

.security-panel {
    border-radius: 28px;
    padding: 24px;
    background: linear-gradient(145deg, #ffffff 0%, #eef7ff 100%);
    border: 1px solid rgba(70,139,223,.18);
    box-shadow: var(--shadow);
}

.security-panel ul,
.note-list,
.check-list {
    list-style: none;
    padding: 0;
    margin: 16px 0 0;
    display: grid;
    gap: 10px;
}

.security-panel li,
.note-list li,
.check-list li {
    position: relative;
    padding-left: 28px;
    color: #49627f;
}

.security-panel li::before,
.note-list li::before,
.check-list li::before {
    content: "";
    position: absolute;
    top: .74em;
    left: 0;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 5px rgba(70,139,223,.13);
}

.module-soft {
    background: linear-gradient(135deg, #f4f9ff, #ffffff);
    border-top: 1px solid rgba(219,232,245,.68);
    border-bottom: 1px solid rgba(219,232,245,.68);
}

.page-hero {
    padding: 48px 0 28px;
    background:
        radial-gradient(circle at 15% 10%, rgba(70,139,223,.16), transparent 34%),
        linear-gradient(135deg, #f6fbff 0%, #ffffff 58%, #eaf4ff 100%);
}

.page-hero .container {
    display: grid;
    gap: 18px;
}

.page-title-wrap {
    max-width: 850px;
}

.article-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 24px;
    box-shadow: var(--shadow);
}

.article-card h2 {
    font-size: 1.45rem;
    margin-top: 6px;
}

.article-sidebar {
    display: grid;
    gap: 16px;
}

.tip-box {
    padding: 18px;
    border-radius: 20px;
    background: var(--primary-soft);
    border: 1px solid rgba(70,139,223,.15);
}

.article-cta,
.cta-section {
    text-align: center;
    border-radius: 30px;
    padding: 34px 20px;
    background: linear-gradient(135deg, rgba(70,139,223,.12), rgba(255,255,255,.92));
    border: 1px solid rgba(70,139,223,.16);
}

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

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

.download-panel {
    max-width: 850px;
    margin: 0 auto;
    text-align: center;
    padding: 28px;
    border-radius: 30px;
    background: #fff;
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

.download-panel .download-btn {
    margin-top: 12px;
}

.timeline {
    display: grid;
    gap: 14px;
    margin-top: 22px;
}

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

.table-like {
    display: grid;
    gap: 12px;
}

.table-row {
    padding: 16px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid var(--line);
}

.site-footer {
    margin-top: 40px;
    padding: 42px 0 22px;
    background: #10213a;
    color: rgba(255,255,255,.82);
}

.site-footer p,
.site-footer a,
.site-footer span {
    color: rgba(255,255,255,.72);
}

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

.footer-brand {
    color: #fff;
    font-size: 1.2rem;
    font-weight: 850;
    margin-bottom: 10px;
}

.site-footer h3 {
    color: #fff;
    font-size: 1rem;
}

.site-footer a {
    display: block;
    margin: 8px 0;
}

.footer-bottom {
    margin-top: 28px;
    padding-top: 18px;
    border-top: 1px solid rgba(255,255,255,.12);
    font-size: .9rem;
}

@media (min-width: 640px) {
    .metric-strip,
    .help-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .category-grid,
    .feature-grid,
    .scenario-grid,
    .recommend-grid,
    .page-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .nav-toggle-label {
        display: none;
    }

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

    .site-nav a {
        padding: 9px 11px;
    }

    .hero {
        padding: 82px 0 70px;
    }

    .hero-layout {
        grid-template-columns: minmax(0, 1.04fr) minmax(360px, .96fr);
        gap: 46px;
    }

    .metric-strip {
        grid-template-columns: repeat(4, 1fr);
    }

    .category-grid,
    .feature-grid,
    .scenario-grid,
    .recommend-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .steps,
    .process-steps {
        grid-template-columns: repeat(3, 1fr);
    }

    .security-layout,
    .split-layout,
    .article-layout {
        grid-template-columns: minmax(0, 1fr) 360px;
    }

    .footer-grid {
        grid-template-columns: 1.5fr repeat(3, 1fr);
    }

    .section {
        padding: 76px 0;
    }

    .page-hero {
        padding: 72px 0 40px;
    }
}

@media (min-width: 1100px) {
    .site-nav a {
        padding: 10px 14px;
    }

    .process-steps {
        grid-template-columns: repeat(6, 1fr);
    }
}

@media (max-width: 430px) {
    .container {
        width: min(100% - 24px, 1180px);
    }

    .hero-visual {
        min-height: 390px;
    }

    .security-status-card,
    .asset-card,
    .risk-card {
        position: static;
        margin-top: 12px;
        width: 100%;
        max-width: none;
    }

    .hero-visual {
        display: block;
    }

    .app-frame {
        margin: 0 auto;
    }

    .download-btn {
        width: 100%;
    }
}