:root{--color-text:#161616;--color-muted:#5f6670;--color-border:#e2e6ea;--color-bg:#ffffff;--color-bg-soft:#f5f7fa;--color-dark:#111827;--color-accent:#c8141e;--container:1180px}*{box-sizing:border-box}body{margin:0;color:var(--color-text);background:var(--color-bg);font-family:Arial,Helvetica,sans-serif;line-height:1.6}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto}.container{width:min(var(--container), calc(100% - 32px));margin:0 auto}.site-header{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--color-border)}.top-bar{color:#fff;background:var(--color-dark);font-size:13px}.top-bar-inner{display:flex;justify-content:space-between;gap:18px;min-height:34px;align-items:center}.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:82px;gap:24px}.site-brand{display:inline-flex;align-items:center;gap:12px}.brand-mark{display:inline-grid;place-items:center;width:48px;height:48px;color:#fff;background:linear-gradient(135deg,var(--color-dark),var(--color-accent));border-radius:8px;font-size:18px;font-weight:900;letter-spacing:.02em}.brand-text{display:grid;gap:2px}.brand-name{color:#111827;font-size:28px;font-weight:800;letter-spacing:.08em;line-height:1}.brand-subtitle{color:var(--color-muted);font-size:12px;font-weight:700}.primary-nav ul{display:flex;align-items:center;gap:24px;padding:0;margin:0;list-style:none}.primary-nav 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