/* ========================================
   core.css - 重置 + 全局基础样式
   ======================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text, #1a1a1a);
  background-color: var(--color-bg, #ffffff);
  min-height: 100vh;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border: 0;
}

a {
  color: var(--color-link, #0a4d68);
  text-decoration: none;
  transition: color 0.25s ease;
}

a:hover {
  color: var(--color-link-hover, #088395);
}

ul,
ol {
  list-style: none;
}

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

table {
  border-collapse: collapse;
  width: 100%;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-heading, #0a1628);
}

p {
  margin-bottom: 1em;
}

.container {
  width: 100%;
  max-width: var(--container-width, 1200px);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-md, 1rem);
  padding-right: var(--space-md, 1rem);
}

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

.is-hidden {
  display: none !important;
}

.is-active {
  /* 状态类，具体样式由 theme/layout 定义 */
}

.text-center {
  text-align: center;
}

.clearfix::after {
  content: "";
  display: table;
  clear: both;
}

.u-mt-2 {
  margin-top: 2rem;
}