:root {
    --primary: rgb(70,139,223);
    --primary-dark: rgb(38,97,176);
    --primary-light: rgba(70,139,223,.12);
    --bg: #f6f9ff;
    --text: #172033;
    --muted: #5d6a7e;
    --line: #d9e6f7;
    --card: rgba(255,255,255,.88);
    --shadow: 0 18px 50px rgba(39,86,145,.10);
    --radius-lg: 28px;
    --radius-md: 20px;
    --radius-sm: 14px;
}

* { 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(--text);
    background:
        radial-gradient(circle at 20% 0%, rgba(70,139,223,.16), transparent 30%),
        linear-gradient(180deg, #ffffff 0%, #f4f8ff 45%, #ffffff 100%);
    line-height: 1.75;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255,255,255,.86);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(217,230,247,.72);
}
.header-inner {
    width: min(1180px, calc(100% - 32px));
    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; }
.logo-img { width: 36px; height: 36px; object-fit: contain; }
.brand-text { font-size: 18px; }
.nav-toggle {
    border: 1px solid var(--line);
    background: #fff;
    color: var(--text);
    border-radius: 999px;
    padding: 8px 14px;
    font-weight: 700;
}
.site-nav {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 72px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 12px;
    box-shadow: var(--shadow);
}
.site-nav.is-open { display: grid; gap: 4px; }
.site-nav a {
    padding: 10px 12px;
    border-radius: 12px;
    color: #405069;
    font-size: 14px;
    font-weight: 650;
}
.site-nav a:hover { background: var(--primary-light); color: var(--primary-dark); }

.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.narrow { width: min(860px, calc(100% - 32px)); margin: 0 auto; }
.section { padding: 54px 0; }
.section-title { margin: 0 0 10px; font-size: clamp(28px, 4vw, 46px); line-height: 1.16; letter-spacing: -.04em; }
.section-kicker { color: var(--primary-dark); font-weight: 800; font-size: 13px; letter-spacing: .12em; text-transform: uppercase; }
.section-desc { margin: 0 0 26px; color: var(--muted); max-width: 760px; }

.centered-hero {
    padding: 82px 0 36px;
    text-align: center;
}
.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 999px;
    color: var(--primary-dark);
    background: var(--primary-light);
    border: 1px solid rgba(70,139,223,.16);
    font-weight: 800;
    font-size: 13px;
}
.hero-title {
    max-width: 900px;
    margin: 20px auto 16px;
    font-size: clamp(38px, 8vw, 76px);
    line-height: 1.04;
    letter-spacing: -.06em;
}
.hero-copy {
    margin: 0 auto 24px;
    max-width: 760px;
    color: #506078;
    font-size: 17px;
}
.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;
    box-shadow: 0 12px 28px rgba(70,139,223,.26);
    transition: transform .2s ease, box-shadow .2s ease;
}
.download-btn:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(70,139,223,.32); }
.hero-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 18px; }
.hero-tags span, .tag {
    display: inline-flex;
    padding: 7px 12px;
    border-radius: 999px;
    background: rgba(255,255,255,.72);
    border: 1px solid var(--line);
    color: #405069;
    font-size: 13px;
    font-weight: 700;
}

.product-bento {
    display: grid;
    gap: 16px;
    margin-top: 28px;
}
.product-showcase {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    padding: 26px;
    min-height: 430px;
    background:
        radial-gradient(circle at 60% 20%, rgba(70,139,223,.22), transparent 34%),
        linear-gradient(145deg, #ffffff, #eef6ff);
    border: 1px solid rgba(191,212,239,.9);
    box-shadow: var(--shadow);
    display: grid;
    place-items: center;
}
.product-showcase img { width: min(320px, 80%); filter: drop-shadow(0 30px 42px rgba(42,77,129,.18)); }
.status-card, .bento-card, .category-card, .scenario-card, .faq-item, .doc-card, .security-panel {
    background: var(--card);
    border: 1px solid rgba(207,224,246,.88);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 34px rgba(49,91,145,.07);
}
.status-card { padding: 18px; }
.status-card strong { display: block; font-size: 16px; margin-bottom: 4px; }
.status-card p { margin: 0; color: var(--muted); font-size: 14px; }
.status-grid { display: grid; gap: 16px; }

.capability-grid, .scenario-grid, .faq-grid { display: grid; gap: 16px; }
.capability-card { padding: 22px; border-radius: 22px; background: #fff; border: 1px solid var(--line); }
.capability-card h3 { margin: 0 0 8px; font-size: 19px; }
.capability-card p { margin: 0; color: var(--muted); }

.roadmap {
    position: relative;
    display: grid;
    gap: 14px;
}
.roadmap-step {
    position: relative;
    padding: 20px 20px 20px 66px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 22px;
}
.roadmap-step::before {
    content: attr(data-step);
    position: absolute;
    left: 18px;
    top: 20px;
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-size: 13px;
    font-weight: 900;
}
.roadmap-step h3 { margin: 0 0 4px; font-size: 18px; }
.roadmap-step p { margin: 0 0 8px; color: var(--muted); font-size: 14px; }
.inline-link { color: var(--primary-dark); font-weight: 800; }

.category-bento, .bento-grid { display: grid; gap: 16px; }
.category-card, .bento-card, .scenario-card { padding: 22px; }
.category-card h3, .bento-card h3, .scenario-card h3 { margin: 0 0 8px; font-size: 20px; }
.category-card p, .bento-card p, .scenario-card p { margin: 0 0 12px; color: var(--muted); }
.card-link { color: var(--primary-dark); font-weight: 800; }
.bento-card.large { background: linear-gradient(145deg, #ffffff, #edf6ff); }
.bento-card.small { min-height: 160px; }

.security-layout {
    display: grid;
    gap: 20px;
    align-items: start;
    padding: 28px;
    border-radius: var(--radius-lg);
    background: linear-gradient(140deg, #ffffff, #f0f6ff);
    border: 1px solid var(--line);
}
.principle-list { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.principle-list li {
    display: grid;
    grid-template-columns: 34px 1fr;
    gap: 12px;
    align-items: start;
    padding: 14px;
    background: rgba(255,255,255,.78);
    border: 1px solid var(--line);
    border-radius: 16px;
}
.principle-list span {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: var(--primary-light);
    color: var(--primary-dark);
    font-weight: 900;
}

.faq-item { padding: 20px; }
.faq-item h3 { margin: 0 0 8px; font-size: 18px; }
.faq-item p { margin: 0; color: var(--muted); }
.cta-section {
    text-align: center;
    padding: 44px 22px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(70,139,223,.14), rgba(255,255,255,.92));
    border: 1px solid var(--line);
}
.cta-section h2 { margin: 0 0 10px; font-size: clamp(26px, 4vw, 42px); }
.cta-section p { margin: 0 auto 22px; max-width: 690px; color: var(--muted); }

.page-hero {
    padding: 56px 0 26px;
    text-align: center;
}
.page-hero h1 { margin: 14px auto 12px; max-width: 880px; font-size: clamp(34px, 6vw, 56px); line-height: 1.12; letter-spacing: -.04em; }
.page-hero p { max-width: 760px; margin: 0 auto; color: var(--muted); }
.badge {
    display: inline-flex;
    padding: 7px 12px;
    border-radius: 999px;
    background: var(--primary-light);
    color: var(--primary-dark);
    font-weight: 900;
    font-size: 13px;
}
.doc-layout { display: grid; gap: 22px; align-items: start; }
.doc-main, .doc-aside {
    background: rgba(255,255,255,.78);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow);
}
.doc-main h2 { margin-top: 0; font-size: 25px; }
.doc-main p { color: #405069; }
.doc-card { padding: 18px; margin: 14px 0; }
.doc-card h3 { margin: 0 0 6px; }
.doc-card p { margin: 0; color: var(--muted); }
.check-list, .clean-list { padding-left: 20px; color: #405069; }
.check-list li, .clean-list li { margin: 8px 0; }
.notice {
    margin: 18px 0;
    padding: 16px 18px;
    border-left: 4px solid var(--primary);
    border-radius: 16px;
    background: rgba(70,139,223,.10);
    color: #31425d;
}
.doc-actions { margin-top: 24px; }

.download-steps { counter-reset: step; display: grid; gap: 12px; margin: 24px 0; }
.download-step {
    counter-increment: step;
    padding: 18px 18px 18px 58px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #fff;
    position: relative;
}
.download-step:before {
    content: counter(step);
    position: absolute;
    left: 18px;
    top: 18px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    color: #fff;
    background: var(--primary);
    font-weight: 900;
}
.download-step h3 { margin: 0 0 4px; }
.download-step p { margin: 0; color: var(--muted); }

.site-footer { margin-top: 48px; background: #f2f7ff; border-top: 1px solid var(--line); }
.footer-inner {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
    padding: 34px 0;
    display: grid;
    gap: 20px;
}
.footer-brand { font-weight: 900; font-size: 20px; margin-bottom: 6px; }
.site-footer p { margin: 0; color: var(--muted); max-width: 620px; }
.footer-links { display: grid; gap: 8px; }
.footer-links a { color: #405069; font-weight: 700; }
.footer-bottom { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 16px 0 28px; color: #778399; font-size: 13px; }

@media (min-width: 700px) {
    .capability-grid, .scenario-grid, .faq-grid { grid-template-columns: repeat(2, 1fr); }
    .category-bento { grid-template-columns: repeat(2, 1fr); }
    .bento-grid { grid-template-columns: repeat(2, 1fr); }
    .product-bento { grid-template-columns: 1.4fr .8fr; align-items: stretch; }
    .status-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { grid-template-columns: 1fr auto; }
    .footer-links { grid-template-columns: repeat(2, auto); column-gap: 18px; }
}

@media (min-width: 980px) {
    .nav-toggle { display: none; }
    .site-nav { position: static; display: flex; align-items: center; gap: 2px; box-shadow: none; border: 0; background: transparent; padding: 0; }
    .section { padding: 72px 0; }
    .product-bento { grid-template-columns: 1.65fr .8fr; }
    .product-showcase { min-height: 540px; }
    .status-grid { grid-template-columns: 1fr; }
    .capability-grid { grid-template-columns: repeat(4, 1fr); }
    .roadmap { grid-template-columns: repeat(3, 1fr); }
    .roadmap-step:nth-child(even) { transform: translateY(24px); }
    .category-bento { grid-template-columns: repeat(4, 1fr); grid-auto-flow: dense; }
    .category-card.wide { grid-column: span 2; }
    .bento-grid { grid-template-columns: repeat(6, 1fr); }
    .bento-card.large { grid-column: span 3; min-height: 230px; }
    .bento-card.medium { grid-column: span 2; }
    .bento-card.small { grid-column: span 1; }
    .security-layout { grid-template-columns: 1fr 1fr; padding: 36px; }
    .scenario-grid { grid-template-columns: repeat(3, 1fr); }
    .faq-grid { grid-template-columns: repeat(2, 1fr); }
    .doc-layout { grid-template-columns: minmax(0, 1fr) 320px; }
    .doc-aside { position: sticky; top: 96px; }
}

@media (max-width: 420px) {
    .container, .narrow, .header-inner, .footer-inner, .footer-bottom { width: min(100% - 24px, 1180px); }
    .centered-hero { padding-top: 54px; }
    .hero-copy { font-size: 15px; }
    .download-btn { width: 100%; max-width: 320px; }
    .product-showcase { min-height: 360px; padding: 18px; }
    .doc-main, .doc-aside { padding: 18px; border-radius: 22px; }
}