@font-face {
  font-family: "Inter";
  src: url("../fonts/inter-400.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  src: url("../fonts/inter-500.woff2") format("woff2");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  src: url("../fonts/inter-600.woff2") format("woff2");
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  src: url("../fonts/inter-700.woff2") format("woff2");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--surface-page);
  font-family: var(--font);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--brand-900);
}

button,
input {
  font: inherit;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 3px;
}

img {
  display: block;
  max-width: 100%;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 16px;
  font-size: var(--fs-display);
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: -.015em;
}

h2 {
  margin-bottom: 16px;
  font-size: var(--fs-h2);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -.01em;
}

h3 {
  margin-bottom: 12px;
  font-size: var(--fs-h3);
  font-weight: 600;
  line-height: 1.4;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-right: auto;
  margin-left: auto;
  padding-right: 24px;
  padding-left: 24px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.eyebrow {
  margin-bottom: 6px;
  color: var(--brand-900);
  font-size: var(--fs-small);
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.clipboard-fallback {
  position: fixed;
  left: -9999px;
}

/* ------------------------------------------------------------
   面板（阶段 20）—— 页面是浅灰的「地」，内容坐在白色的「图」上。
   区块之间靠面板间距分开，不靠描边。
   ------------------------------------------------------------ */
.panel {
  padding: var(--panel-pad);
  border-radius: var(--radius-lg);
  background: var(--bg);
  box-shadow: var(--shadow-1);
}

.panel--tight {
  padding: var(--space-5);
}

.panel > :last-child {
  margin-bottom: 0;
}