:root {
    --primary: rgb(70,139,223);
    --primary-dark: rgb(38, 93, 169);
    --primary-soft: rgba(70,139,223,.10);
    --primary-line: rgba(70,139,223,.18);
    --ink: #122033;
    --muted: #607086;
    --light: #f7fbff;
    --soft: #eef6ff;
    --card: rgba(255,255,255,.88);
    --line: #dbe8f5;
    --shadow: 0 22px 70px rgba(24,72,126,.10);
    --radius: 24px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
    line-height: 1.7;
    background:
        radial-gradient(circle at 10% 0%, rgba(70,139,223,.12), transparent 28rem),
        linear-gradient(180deg, #ffffff 0%, #f7fbff 38%, #ffffff 100%);
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
main { min-height: 70vh; }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.section { padding: 56px 0; }
.section-head { max-width: 760px; margin: 0 auto 28px; text-align: center; }
.section-head.align-left { text-align: left; margin-left: 0; }
.eyebrow, .category-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    border: 1px solid var(--primary-line);
    border-radius: 999px;
    color: var(--primary-dark);
    background: rgba(255,255,255,.72);
    font-size: 13px;
    font-weight: 700;
}
h1, h2, h3 { line-height: 1.22; margin: 0; letter-spacing: -.02em; }
h1 { font-size: clamp(34px, 7vw, 68px); }
h2 { font-size: clamp(26px, 4vw, 42px); }
h3 { font-size: 20px; }
p { margin: 12px 0 0; color: var(--muted); }
.small-text { font-size: 14px; color: var(--muted); }
.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 28px rgba(70,139,223,.28);
    transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    border: 0;
    cursor: pointer;
}
.download-btn:hover { transform: translateY(-2px); background: var(--primary-dark); box-shadow: 0 18px 34px rgba(70,139,223,.34); }
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(18px);
    background: rgba(255,255,255,.82);
    border-bottom: 1px solid rgba(219,232,245,.78);
}
.nav-shell {
    width: min(1180px, calc(100% - 28px));
    margin: 0 auto;
    min-height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 900; color: var(--ink); }
.logo { width: 36px; height: 36px; border-radius: 10px; }
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
    padding: 9px 13px;
    border-radius: 999px;
    color: #43546b;
    font-size: 14px;
    font-weight: 700;
}
.main-nav a:hover, .main-nav a.active { background: var(--primary-soft); color: var(--primary-dark); }
.nav-toggle { display: none; }
.nav-toggle-label { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 10px; }
.nav-toggle-label span { width: 24px; height: 2px; background: var(--ink); border-radius: 2px; }
.centered-hero { padding: 72px 0 34px; text-align: center; }
.hero-copy { max-width: 860px; margin: 0 auto; }
.hero-copy p { font-size: 18px; max-width: 760px; margin-left: auto; margin-right: auto; }
.hero-actions { margin-top: 28px; display: flex; justify-content: center; }
.security-tags { margin-top: 18px; display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; }
.security-tags span {
    display: inline-flex;
    padding: 8px 12px;
    border-radius: 999px;
    color: #315776;
    background: #fff;
    border: 1px solid var(--line);
    font-size: 13px;
    font-weight: 700;
}
.product-bento {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 28px;
}
.product-showcase {
    position: relative;
    overflow: hidden;
    border-radius: 30px;
    background: linear-gradient(145deg, rgba(70,139,223,.13), rgba(255,255,255,.9));
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    padding: 28px;
    min-height: 440px;
    display: grid;
    place-items: center;
}
.product-showcase::before {
    content: "";
    position: absolute;
    inset: 22px;
    border: 1px solid rgba(70,139,223,.11);
    border-radius: 24px;
    pointer-events: none;
}
.app-screen { width: min(280px, 76vw); border-radius: 34px; box-shadow: 0 28px 70px rgba(18,32,51,.18); position: relative; z-index: 2; }
.status-cluster { display: grid; grid-template-columns: 1fr; gap: 14px; }
.status-card, .glass-card, .category-card, .feature-card, .scenario-card, .faq-item, .note-card, .step-card, .principle-card {
    border: 1px solid var(--line);
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.status-card { padding: 18px; }
.status-card strong { display: block; color: var(--ink); font-size: 16px; }
.status-card span { display: block; margin-top: 4px; color: var(--muted); font-size: 14px; }
.card-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.capability-card { padding: 22px; min-height: 180px; }
.capability-card .icon, .feature-card .icon, .category-card .icon {
    width: 42px; height: 42px; display: grid; place-items: center;
    border-radius: 14px; background: var(--primary-soft); color: var(--primary-dark); font-weight: 900; margin-bottom: 16px;
}
.roadmap { position: relative; display: grid; grid-template-columns: 1fr; gap: 16px; counter-reset: step; }
.roadmap::before { content: ""; position: absolute; left: 20px; top: 12px; bottom: 12px; width: 2px; background: var(--primary-line); }
.roadmap-item {
    position: relative;
    display: grid;
    grid-template-columns: 44px 1fr;
    gap: 14px;
    align-items: start;
}
.roadmap-number {
    position: relative; z-index: 1; width: 42px; height: 42px; border-radius: 50%;
    background: var(--primary); color: #fff; display: grid; place-items: center; font-weight: 900;
    box-shadow: 0 10px 24px rgba(70,139,223,.28);
}
.step-card { padding: 18px; }
.step-card a, .text-link { display: inline-flex; margin-top: 12px; color: var(--primary-dark); font-weight: 800; }
.category-bento { display: grid; grid-template-columns: 1fr; gap: 16px; }
.category-card { padding: 22px; transition: transform .2s ease, border-color .2s ease; }
.category-card:hover { transform: translateY(-3px); border-color: rgba(70,139,223,.35); }
.category-card a { display: inline-flex; margin-top: 14px; color: var(--primary-dark); font-weight: 800; }
.bento-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.feature-card { padding: 24px; min-height: 190px; }
.feature-card.large { background: linear-gradient(145deg, rgba(70,139,223,.12), rgba(255,255,255,.92)); }
.feature-card.small { min-height: 130px; }
.security-layout { display: grid; grid-template-columns: 1fr; gap: 22px; align-items: start; }
.security-panel { padding: 26px; border-radius: 30px; background: linear-gradient(160deg, #ffffff, #eef6ff); border: 1px solid var(--line); box-shadow: var(--shadow); }
.principle-list { display: grid; gap: 12px; margin-top: 18px; }
.principle-card { padding: 16px; display: flex; gap: 12px; align-items: flex-start; }
.principle-card b { color: var(--primary-dark); }
.scenario-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.scenario-card { padding: 20px; }
.scenario-card a { display: inline-flex; margin-top: 12px; font-weight: 800; color: var(--primary-dark); }
.faq-list { display: grid; gap: 14px; }
.faq-item { padding: 20px; }
.faq-item summary { cursor: pointer; font-weight: 900; color: var(--ink); }
.faq-item p { margin-top: 10px; }
.cta-section {
    text-align: center;
    padding: 48px 22px;
    border-radius: 32px;
    border: 1px solid var(--line);
    background: linear-gradient(135deg, rgba(70,139,223,.12), rgba(255,255,255,.95));
    box-shadow: var(--shadow);
}
.cta-section .download-btn { margin-top: 22px; }
.page-hero { padding: 56px 0 22px; }
.page-hero .container { max-width: 900px; }
.page-hero p { font-size: 17px; }
.doc-layout { width: min(1060px, calc(100% - 32px)); margin: 0 auto; padding: 28px 0 64px; display: grid; gap: 22px; }
.doc-main, .doc-side { min-width: 0; }
.doc-card { background: rgba(255,255,255,.86); border: 1px solid var(--line); box-shadow: var(--shadow); border-radius: 28px; padding: 24px; }
.doc-card + .doc-card { margin-top: 18px; }
.doc-card h2 { font-size: 26px; margin-bottom: 10px; }
.doc-card ul, .doc-card ol { padding-left: 22px; color: var(--muted); }
.doc-card li + li { margin-top: 8px; }
.inline-list { display: grid; gap: 12px; margin-top: 16px; }
.inline-list div { padding: 15px; border: 1px solid var(--line); background: var(--light); border-radius: 18px; }
.note-card { padding: 20px; background: #fff; }
.note-card h3 { margin-bottom: 8px; }
.download-strip { margin-top: 22px; padding: 22px; border-radius: 24px; background: var(--soft); border: 1px solid var(--primary-line); text-align: center; }
.download-strip p { margin-bottom: 18px; }
.download-steps { display: grid; gap: 16px; margin-top: 24px; }
.download-step { display: grid; grid-template-columns: 42px 1fr; gap: 14px; align-items: start; padding: 18px; border: 1px solid var(--line); border-radius: 22px; background: #fff; }
.download-step span { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 50%; background: var(--primary-soft); color: var(--primary-dark); font-weight: 900; }
.about-grid { display: grid; gap: 16px; }
.about-card { padding: 24px; border: 1px solid var(--line); border-radius: 26px; background: #fff; box-shadow: var(--shadow); }
.site-footer { margin-top: 30px; background: #ffffff; border-top: 1px solid var(--line); }
.footer-grid { padding: 42px 0; display: grid; gap: 24px; }
.footer-brand { margin-bottom: 12px; }
.site-footer h3 { font-size: 15px; margin-bottom: 12px; }
.site-footer a:not(.brand) { display: block; color: var(--muted); margin: 7px 0; font-size: 14px; }
.footer-bottom { border-top: 1px solid var(--line); text-align: center; padding: 18px; color: var(--muted); font-size: 13px; }
@media (max-width: 760px) {
    .nav-toggle-label { display: flex; }
    .main-nav {
        position: absolute; left: 14px; right: 14px; top: 70px;
        display: none; flex-direction: column; align-items: stretch;
        background: rgba(255,255,255,.96); border: 1px solid var(--line); border-radius: 22px; padding: 10px; box-shadow: var(--shadow);
    }
    .main-nav a { padding: 12px 14px; }
    .nav-toggle:checked ~ .main-nav { display: flex; }
    .centered-hero { padding-top: 52px; }
    .product-showcase { min-height: 360px; padding: 24px 18px; }
}
@media (min-width: 680px) {
    .card-grid { grid-template-columns: repeat(2, 1fr); }
    .category-bento { grid-template-columns: repeat(2, 1fr); }
    .scenario-grid { grid-template-columns: repeat(2, 1fr); }
    .download-steps { grid-template-columns: repeat(2, 1fr); }
    .about-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 960px) {
    .section { padding: 76px 0; }
    .centered-hero { padding-top: 96px; }
    .product-bento { grid-template-columns: minmax(0, 1.45fr) minmax(280px, .75fr); gap: 22px; align-items: stretch; }
    .status-cluster { align-content: stretch; }
    .status-card:nth-child(2) { transform: translateX(-18px); }
    .status-card:nth-child(3) { transform: translateX(18px); }
    .card-grid { grid-template-columns: repeat(4, 1fr); }
    .roadmap { grid-template-columns: repeat(6, 1fr); gap: 14px; align-items: start; }
    .roadmap::before { left: 0; right: 0; top: 21px; bottom: auto; width: auto; height: 2px; }
    .roadmap-item { grid-template-columns: 1fr; gap: 12px; }
    .roadmap-item:nth-child(even) { margin-top: 42px; }
    .category-bento { grid-template-columns: repeat(4, 1fr); grid-auto-rows: minmax(170px, auto); }
    .category-card.big { grid-column: span 2; }
    .bento-grid { grid-template-columns: repeat(4, 1fr); grid-auto-rows: minmax(150px, auto); }
    .feature-card.large { grid-column: span 2; grid-row: span 2; }
    .feature-card.medium { grid-column: span 2; }
    .security-layout { grid-template-columns: 1.05fr .95fr; gap: 42px; }
    .scenario-grid { grid-template-columns: repeat(5, 1fr); }
    .scenario-card { min-height: 210px; }
    .doc-layout { grid-template-columns: minmax(0, 1fr) 320px; align-items: start; }
    .doc-side { position: sticky; top: 96px; }
    .footer-grid { grid-template-columns: 1.4fr .8fr .8fr; }
}