:root{--bg:#f7f8fb;--bg-alt:#eef1f7;--surface:#fff;--text:#16181d;--muted:#5a6172;--line:#dfe3ec;--accent:#2456d6;--accent-text:#fff;--accent-soft:#e4ecff;--radius:14px;--shadow:0 1px 2px #141e3c0f, 0 8px 24px #141e3c0f;--font:system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Leelawadee UI", Tahoma, "Noto Sans Thai", "Noto Sans", "Hiragino Sans", "Yu Gothic UI", "Meiryo", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;--mono:ui-monospace, "Cascadia Mono", Consolas, "SFMono-Regular", Menlo, monospace;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--bg:#0f1218;--bg-alt:#151a23;--surface:#1a202b;--text:#eef1f7;--muted:#a3acbf;--line:#2a3242;--accent:#7ea2ff;--accent-text:#0b1020;--accent-soft:#1e2a47;--shadow:0 1px 2px #0006, 0 8px 24px 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0}.section.alt{background:var(--bg-alt)}.section-intro{color:var(--muted);max-width:62ch;margin-bottom:32px}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.feature-grid{grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:18px;display:grid}.feature .icon{background:var(--accent-soft);width:46px;height:46px;color:var(--accent);border-radius:12px;justify-content:center;align-items:center;margin-bottom:14px;display:inline-flex}.feature p{color:var(--muted);margin:0}.steps{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin-top:28px;display:grid}.step-no{background:var(--accent);width:34px;height:34px;color:var(--accent-text);border-radius:50%;justify-content:center;align-items:center;margin-bottom:12px;font-weight:700;display:inline-flex}.steps 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