* {
    box-sizing: border-box;
}

:root {
    --primary: rgb(70,139,223);
    --primary-dark: rgb(38,91,160);
    --primary-soft: rgb(232,242,255);
    --blue-50: #f4f8ff;
    --blue-100: #eaf3ff;
    --ink: #122033;
    --muted: #5c6d82;
    --line: #dce8f7;
    --card: rgba(255, 255, 255, 0.92);
    --shadow: 0 18px 48px rgba(42, 86, 148, 0.12);
    --radius: 22px;
    --radius-lg: 30px;
    --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;
    line-height: 1.72;
    background:
        radial-gradient(circle at 50% 0%, rgba(70,139,223,0.14), transparent 32rem),
        linear-gradient(180deg, #ffffff 0%, #f7fbff 42%, #ffffff 100%);
    min-width: 320px;
    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: 50;
    backdrop-filter: blur(16px);
    background: rgba(255,255,255,0.78);
    border-bottom: 1px solid rgba(220,232,247,0.85);
}

.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,
.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.brand-logo,
.footer-logo {
    width: 38px;
    height: 38px;
    object-fit: contain;
}

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

.nav-toggle {
    border: 0;
    background: var(--blue-100);
    border-radius: 14px;
    width: 44px;
    height: 42px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 20px;
    height: 2px;
    background: var(--primary-dark);
    border-radius: 999px;
}

.primary-nav {
    position: absolute;
    top: 72px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 14px;
    background: rgba(255,255,255,0.98);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
}

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

.primary-nav a {
    padding: 10px 12px;
    color: #33445a;
    border-radius: 12px;
    font-size: 14px;
}

.primary-nav a:hover {
    color: var(--primary-dark);
    background: var(--blue-100);
}

.section,
.centered-hero,
.page-hero {
    width: min(100% - 32px, var(--container));
    margin: 0 auto;
}

.centered-hero {
    padding: 76px 0 34px;
    text-align: center;
}

.eyebrow,
.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    border: 1px solid rgba(70,139,223,0.24);
    border-radius: 999px;
    background: rgba(232,242,255,0.78);
    color: var(--primary-dark);
    font-size: 13px;
    font-weight: 700;
}

h1,
h2,
h3 {
    line-height: 1.18;
    letter-spacing: -0.04em;
    margin: 0;
}

h1 {
    font-size: clamp(34px, 8vw, 72px);
    margin-top: 20px;
}

h2 {
    font-size: clamp(26px, 4vw, 44px);
}

h3 {
    font-size: 20px;
}

.lead {
    max-width: 760px;
    margin: 18px auto 0;
    color: var(--muted);
    font-size: clamp(16px, 2.2vw, 19px);
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    margin-top: 28px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    box-shadow: 0 14px 34px rgba(70,139,223,0.28);
    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 42px rgba(70,139,223,0.34);
}

.trust-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 18px;
}

.trust-tags span,
.tag {
    padding: 8px 12px;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--line);
    color: #49627f;
    font-size: 13px;
    box-shadow: 0 8px 22px rgba(42,86,148,0.06);
}

.product-bento {
    margin: 34px auto 74px;
    padding: 18px;
    display: grid;
    gap: 14px;
    background: linear-gradient(145deg, rgba(255,255,255,0.96), rgba(232,242,255,0.64));
    border: 1px solid rgba(220,232,247,0.95);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.product-main {
    min-height: 320px;
    display: grid;
    place-items: center;
    padding: 22px;
    border-radius: 24px;
    background:
        radial-gradient(circle at 50% 25%, rgba(70,139,223,0.17), transparent 16rem),
        linear-gradient(180deg, #ffffff, #f6faff);
    border: 1px solid rgba(220,232,247,0.9);
}

.product-main img {
    max-height: 440px;
    object-fit: contain;
    filter: drop-shadow(0 24px 50px rgba(35,79,138,.18));
}

.status-card,
.card,
.category-card,
.scenario-card,
.faq-item,
.doc-card,
.step-card,
.principle-card,
.security-point {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 12px 34px rgba(42,86,148,0.07);
}

.status-card {
    padding: 20px;
}

.status-card strong,
.card strong,
.doc-card strong {
    display: block;
    margin-bottom: 7px;
    color: var(--primary-dark);
}

.section {
    padding: 42px 0;
}

.section-head {
    max-width: 760px;
    margin-bottom: 24px;
}

.section-head.center {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

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

.capability-grid,
.scenario-grid {
    display: grid;
    gap: 14px;
}

.card,
.scenario-card,
.category-card {
    padding: 22px;
}

.card p,
.category-card p,
.scenario-card p,
.step-card p,
.doc-card p,
.principle-card p {
    color: var(--muted);
    margin: 9px 0 0;
}

.card-link,
.text-link {
    display: inline-flex;
    margin-top: 14px;
    color: var(--primary-dark);
    font-weight: 800;
}

.roadmap {
    position: relative;
    display: grid;
    gap: 14px;
    margin-top: 28px;
}

.step-card {
    position: relative;
    padding: 20px 20px 20px 70px;
}

.step-number {
    position: absolute;
    left: 18px;
    top: 20px;
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    font-weight: 900;
    box-shadow: 0 10px 24px rgba(70,139,223,0.25);
}

.category-bento {
    display: grid;
    gap: 14px;
}

.category-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 174px;
}

.category-card.featured {
    background: linear-gradient(145deg, #ffffff, var(--blue-100));
}

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

.bento-card {
    min-height: 176px;
}

.bento-card.large {
    min-height: 250px;
}

.security-layout {
    display: grid;
    gap: 18px;
    align-items: center;
    padding: 24px;
    border-radius: var(--radius-lg);
    background: linear-gradient(145deg, #ffffff, #f2f7ff);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}

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

.security-point {
    padding: 18px;
}

.security-point span {
    display: inline-flex;
    width: 28px;
    height: 28px;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 13px;
    font-weight: 900;
    margin-right: 8px;
}

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

.faq-item {
    padding: 20px;
}

.faq-item h3 {
    font-size: 18px;
    margin-bottom: 8px;
}

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

.cta-section {
    width: min(100% - 32px, var(--container));
    margin: 42px auto 76px;
    text-align: center;
    padding: 44px 22px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
    background:
        radial-gradient(circle at 50% 20%, rgba(70,139,223,0.15), transparent 20rem),
        linear-gradient(145deg, #ffffff, var(--blue-100));
    box-shadow: var(--shadow);
}

.cta-section p {
    max-width: 680px;
    margin: 14px auto 0;
    color: var(--muted);
}

.page-hero {
    padding: 58px 0 30px;
}

.page-hero.narrow,
.doc-layout {
    width: min(100% - 32px, 920px);
}

.page-hero p {
    max-width: 760px;
    color: var(--muted);
    margin: 16px 0 0;
}

.doc-layout {
    display: grid;
    gap: 16px;
    margin: 0 auto 72px;
}

.doc-section {
    background: rgba(255,255,255,0.86);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: 0 12px 32px rgba(42,86,148,0.06);
}

.doc-section p {
    color: var(--muted);
}

.doc-grid {
    display: grid;
    gap: 14px;
    margin-top: 18px;
}

.doc-card {
    padding: 18px;
}

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

.check-list li,
.clean-list li {
    position: relative;
    padding-left: 28px;
    color: var(--muted);
}

.check-list li::before,
.clean-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: .64em;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 5px rgba(70,139,223,0.12);
}

.cta-inline {
    text-align: center;
    margin-top: 22px;
}

.site-footer {
    background: #f5f9ff;
    border-top: 1px solid var(--line);
}

.footer-grid {
    width: min(100% - 32px, var(--container));
    margin: 0 auto;
    padding: 40px 0 24px;
    display: grid;
    gap: 24px;
}

.footer-grid p {
    color: var(--muted);
    margin: 12px 0 0;
    max-width: 440px;
}

.footer-grid h2 {
    font-size: 15px;
    letter-spacing: 0;
    margin-bottom: 10px;
}

.footer-grid a:not(.footer-brand) {
    display: block;
    color: #54667d;
    margin: 7px 0;
    font-size: 14px;
}

.footer-bottom {
    width: min(100% - 32px, var(--container));
    margin: 0 auto;
    padding: 18px 0 28px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    border-top: 1px solid var(--line);
    color: #6b7c91;
    font-size: 13px;
}

@media (min-width: 720px) {
    .capability-grid,
    .scenario-grid,
    .doc-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

    .footer-grid {
        grid-template-columns: 1.6fr repeat(3, 1fr);
    }

    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

@media (min-width: 980px) {
    .nav-toggle {
        display: none;
    }

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

    .centered-hero {
        padding-top: 108px;
    }

    .product-bento {
        grid-template-columns: 1.45fr .8fr;
        grid-template-areas:
            "main s1"
            "main s2"
            "main s3"
            "main s4";
        gap: 16px;
        padding: 20px;
    }

    .product-main {
        grid-area: main;
        min-height: 590px;
    }

    .status-card:nth-child(2) { grid-area: s1; transform: translateY(18px); }
    .status-card:nth-child(3) { grid-area: s2; }
    .status-card:nth-child(4) { grid-area: s3; transform: translateY(-8px); }
    .status-card:nth-child(5) { grid-area: s4; }

    .capability-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .roadmap {
        grid-template-columns: repeat(6, minmax(0, 1fr));
        align-items: stretch;
    }

    .step-card {
        padding: 68px 16px 18px;
    }

    .step-number {
        top: 18px;
        left: 16px;
    }

    .step-card:nth-child(even) {
        transform: translateY(22px);
    }

    .category-bento {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .category-card.featured {
        grid-column: span 2;
        min-height: 220px;
    }

    .bento-grid {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .bento-card.large {
        grid-column: span 2;
        min-height: 260px;
    }

    .bento-card.medium {
        grid-column: span 2;
    }

    .security-layout {
        grid-template-columns: 1fr 1fr;
        padding: 36px;
    }

    .scenario-grid {
        grid-template-columns: repeat(5, minmax(0, 1fr));
    }

    .doc-layout.two-column {
        width: min(100% - 32px, var(--container));
        grid-template-columns: minmax(0, 1fr) 340px;
        align-items: start;
    }

    .doc-layout.two-column .doc-aside {
        position: sticky;
        top: 96px;
    }
}