*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-background);
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 1.25rem; }
.container--narrow { max-width: 800px; }
.section { padding: var(--space-xl) 0; }
.section--surface { background: var(--color-surface); }
.section--dark { background: var(--color-dark-bg); color: var(--color-white); }
.section__header { margin-bottom: var(--space-lg); }
.section__header--split { display: flex; justify-content: space-between; align-items: flex-end; flex-wrap: wrap; gap: var(--space-md); }
.section__title { font-size: clamp(1.75rem, 4vw, 2.5rem); line-height: 1.2; font-weight: 700; color: var(--color-primary); }
.section__title--light { color: var(--color-white); }
.eyebrow { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-accent); font-weight: 600; margin-bottom: var(--space-xs); }
.eyebrow--light { color: var(--color-accent); }
.lead { font-size: 1.15rem; color: var(--color-text-light); max-width: 700px; }
.page-title { font-size: clamp(1.75rem, 4vw, 2.5rem); color: var(--color-primary); margin-bottom: var(--space-md); }
.placeholder-note { color: var(--color-text-light); font-style: italic; padding: var(--space-md) 0; }
.grid { display: grid; gap: var(--space-md); }
.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }
.grid--4 { grid-template-columns: 1fr; }
@media (min-width: 640px) { .grid--2 { grid-template-columns: repeat(2, 1fr); } .grid--3 { grid-template-columns: repeat(2, 1fr); } .grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .grid--3 { grid-template-columns: repeat(3, 1fr); } .grid--4 { grid-template-columns: repeat(4, 1fr); } }

/* === 微信浏览器 & 移动端兼容 === */
html, body {
  overflow-x: hidden;
  max-width: 100vw;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}
*, *::before, *::after { max-width: 100%; }
img, video, iframe, svg { max-width: 100%; height: auto; }
p, h1, h2, h3, h4, h5, h6, li, td, th {
  word-wrap: break-word;
  overflow-wrap: break-word;
  word-break: break-word;
}
/* 移动端 iPhone 安全区域 */
@supports (padding: env(safe-area-inset-left)) {
  .site-header { padding-left: env(safe-area-inset-left); padding-right: env(safe-area-inset-right); }
  .site-footer { padding-left: env(safe-area-inset-left); padding-right: env(safe-area-inset-right); }
}
/* 移动端表格可横向滚动 */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }