/* 全站基础：重置、顶栏、页脚、通用排版和按钮。区块自己的样式写在 sections/<id>/<id>.css，并只选中 #<id> 内的元素。 */
* { box-sizing: border-box; }
html { background: var(--bg); color: var(--ink-1); font-family: var(--font); -webkit-text-size-adjust: 100%; }
body { margin: 0; font-size: var(--fs-body); line-height: 1.7; overflow-x: hidden; }
img, svg, canvas, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
h1, h2, h3, h4 { margin: 0; font-weight: 650; letter-spacing: -0.01em; text-wrap: balance; }
p { margin: 0; text-wrap: pretty; }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; border-radius: 4px; }
.sr-only { position: absolute; width: 1px; height: 1px; min-width: 0; min-inline-size: 0; margin: -1px; padding: 0; border: 0; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; }
[hidden] { display: none !important; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* 通用排版 */
.hl-wrap { width: 100%; max-width: calc(var(--maxw) + var(--pad) * 2); margin: 0 auto; padding: 0 var(--pad); }
.hl-section { position: relative; padding: var(--section-y) 0; scroll-margin-top: var(--nav-h); }
.hl-eyebrow { display: flex; align-items: center; gap: 12px; font-size: var(--fs-small); color: var(--ink-3); letter-spacing: 0.06em; }
.hl-eyebrow b { font-family: var(--mono); font-weight: 400; color: var(--amber); }
.hl-h2 { font-size: var(--fs-h2); line-height: 1.15; margin-top: 16px; }
.hl-lead { font-size: 18px; color: var(--ink-2); max-width: 40em; margin-top: 20px; }

/* 按钮 */
.hl-btn { display: inline-flex; align-items: center; gap: 10px; height: 46px; padding: 0 22px; border-radius: var(--r-btn);
  border: 1px solid var(--line-strong); background: transparent; color: var(--ink-1); font-size: 15px; font-weight: 600; cursor: pointer;
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease); }
.hl-btn:hover { border-color: var(--ink-3); background: rgba(255,255,255,.03); }
.hl-btn--primary { background: var(--ink-1); border-color: var(--ink-1); color: var(--bg); }
.hl-btn--primary:hover { background: #fff; border-color: #fff; }

/* 顶栏 */
.hl-nav { position: fixed; inset: 0 0 auto 0; z-index: var(--z-nav); height: var(--nav-h);
  background: rgba(14,16,18,0); border-bottom: 1px solid rgba(255,255,255,0);
  transition: background-color .35s var(--ease), border-color .35s var(--ease), backdrop-filter .35s var(--ease); }
.hl-nav.is-scrolled, .hl-nav.is-open { background: rgba(14,16,18,.86); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border-bottom-color: rgba(255,255,255,.06); }
.hl-nav .hl-wrap { height: 100%; display: flex; align-items: center; gap: 32px; }
.hl-logo { font-weight: 600; font-size: 16px; letter-spacing: .08em; color: var(--ink-2); }
.hl-nav-links { display: flex; gap: 28px; margin-left: auto; font-size: 15px; color: var(--ink-2); }
.hl-nav-links a { position: relative; transition: color .2s var(--ease); }
.hl-nav-links a::after { content: ""; position: absolute; left: 50%; bottom: -8px; width: 14px; height: 2px; margin-left: -7px; border-radius: 1px;
  background: var(--amber); transform: scaleX(0); transition: transform .3s var(--ease); }
.hl-nav-links a.is-current { color: var(--ink-1); }
.hl-nav-links a.is-current::after { transform: scaleX(1); }
.hl-nav-links a:hover { color: var(--ink-1); }
.hl-lang { display: inline-flex; border: 1px solid var(--line-strong); border-radius: 6px; overflow: hidden; font-size: 13px; }
.hl-lang a { padding: 4px 10px; color: var(--ink-3); }
.hl-lang a[aria-current="true"] { background: var(--ink-1); color: var(--bg); }
.hl-nav .hl-btn { height: 38px; padding: 0 16px; font-size: 14px; }
.hl-menu { display: none; width: 40px; height: 40px; border: 1px solid var(--line-strong); border-radius: var(--r-btn); background: none; }
@media (max-width: 860px) {
  .hl-nav-links { display: none; }
  .hl-lang { margin-left: auto; }
  .hl-nav .hl-btn { display: none; }
  .hl-menu { display: inline-flex; align-items: center; justify-content: center; }
  .hl-nav.is-open .hl-nav-links { display: flex; flex-direction: column; position: absolute; top: var(--nav-h); left: 0; right: 0;
    padding: 16px var(--pad) 24px; gap: 14px; background: var(--bg-raised); border-bottom: 1px solid var(--line); }
}

/* 页脚 */
.hl-footer { border-top: 1px solid var(--line); padding: 40px 0 56px; color: var(--ink-3); font-size: var(--fs-small); }
.hl-footer .hl-wrap { display: flex; flex-wrap: wrap; gap: 16px 40px; justify-content: space-between; }

/* 开发时区块还没做好的占位 */
.hl-pending { min-height: 40vh; display: grid; place-items: center; color: var(--ink-4); border-top: 1px dashed var(--line); font-size: var(--fs-small); }