/* 两个页面共用的设计令牌、顶栏、页脚与语言切换。 语言切换刻意做成纯 CSS：两种语言都留在 DOM 里，靠 决定显示哪一份。好处是 JS 没加载完也不会闪烁，搜索引擎两份都能收。 */ :root { --ink: #1d1d1f; --gray: #6e6e73; --gray-2: #86868b; --hair: #d2d2d7; --bg: #ffffff; --bg-2: #f5f5f7; --amber: #c9832b; --green: #117a44; --red: #c0392b; --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", sans-serif; --mono: ui-monospace, "SF Mono", Menlo, monospace; } * { box-sizing: border-box; } html { scroll-behavior: smooth; } body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--sans); -webkit-font-smoothing: antialiased; line-height: 1.5; } .wrap { max-width: 980px; margin: 0 auto; padding: 0 22px; } /* ── 双语 ─────────────────────────────── */ html[data-lang="en"] [lang="zh"], html[data-lang="zh"] [lang="en"] { display: none !important; } .langtoggle { display: inline-flex; align-items: center; border: 1px solid var(--hair); border-radius: 980px; overflow: hidden; margin-left: 22px; vertical-align: middle; } .langtoggle button { appearance: none; border: 0; background: transparent; cursor: pointer; font: inherit; font-size: 12px; color: var(--gray); padding: 3px 10px; line-height: 1.6; } .langtoggle button:hover { color: var(--ink); } .langtoggle button[aria-pressed="true"] { background: var(--ink); color: #fff; } .langtoggle button:focus-visible { outline: 2px solid var(--amber); outline-offset: -2px; } /* ── 顶栏 ─────────────────────────────── */ nav { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.82); backdrop-filter: saturate(180%) blur(20px); border-bottom: 1px solid rgba(0,0,0,.08); } nav .wrap { min-height: 48px; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; } .brand { display: flex; align-items: center; gap: 8px; font-weight: 600; font-size: 15px; color: inherit; text-decoration: none; } .navlinks { display: flex; align-items: center; } /* app icon 的复刻：不等长的等号，下杠琥珀 */ .mark { width: 22px; height: 22px; border-radius: 6px; background: #1d1d1f; position: relative; flex: none; } .mark::before, .mark::after { content: ""; position: absolute; left: 50%; transform: translateX(-50%); height: 2.5px; border-radius: 2px; } .mark::before { top: 7px; width: 8px; background: #f5f1e8; } .mark::after { top: 12.5px; width: 12px; background: #d9a441; } nav a { color: var(--gray); text-decoration: none; font-size: 13px; margin-left: 22px; } nav a:hover { color: var(--ink); } nav .brand { margin-left: 0; } /* ── 页脚 ─────────────────────────────── */ footer { border-top: 1px solid var(--hair); margin-top: 72px; padding: 28px 0 44px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 12.5px; color: var(--gray-2); } footer a { color: var(--gray-2); } /* ── 键帽 ─────────────────────────────── */ kbd { font-family: var(--sans); font-size: 12px; border: 1px solid var(--hair); border-bottom-width: 2px; border-radius: 5px; padding: 1px 6px; background: #fff; color: var(--ink); white-space: nowrap; } @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { animation-duration: .01ms !important; transition-duration: .01ms !important; } }