/* UVR5 中文站 · 全站样式（深色 + 薄荷绿，对齐 UVR5 官方站视觉体系） */
:root {
  --primary: #61F2CA;
  --primary-deep: #19916D;
  --accent: #53D4B0;
  --bg: #161616;
  --bg-deep: #041812;
  --panel: #1D1D1D;
  --panel-2: #212724;
  --fg: #F7F7F7;
  --sub: #919191;
  --border: #2C3330;
  --radius: 12px;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", system-ui, sans-serif;
  --font-display: "Fjalla One", "Arial Narrow", "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg); color: var(--fg);
  line-height: 1.8; font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 900px; margin: 0 auto; padding: 0 20px; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
::selection { background: rgba(97, 242, 202, .28); }

/* 顶栏 */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(22, 22, 22, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; height: 62px; }
.brand {
  font-family: var(--font-display); font-size: 1.5rem; letter-spacing: .06em;
  color: var(--primary); text-transform: uppercase; white-space: nowrap;
}
.brand em { font-style: normal; font-family: var(--font-body); font-size: .72rem; font-weight: 700;
  letter-spacing: .18em; color: var(--sub); margin-left: 8px; vertical-align: middle; }
.nav-rows { display: flex; flex-direction: column; align-items: flex-end; gap: 2px; }
.site-nav { display: flex; gap: 2px; flex-wrap: wrap; justify-content: flex-end; }
.site-nav a { padding: 4px 9px; border-radius: 7px; color: #C9C9C9; font-size: .9rem; font-weight: 500; }
.site-nav a:hover { color: var(--primary); background: rgba(97, 242, 202, .08); text-decoration: none; }
.site-nav a.active { color: var(--primary); background: rgba(97, 242, 202, .12); }
.site-nav-sub a { font-size: .78rem; color: var(--sub); padding: 2px 7px; }
.site-nav-sub a:hover { color: var(--primary); }

main { padding: 30px 20px 64px; }
.crumbs { color: var(--sub); font-size: .82rem; margin-bottom: 18px; }
.crumbs a { color: var(--sub); }
.crumbs a:hover { color: var(--primary); }

/* 首屏 */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(120% 140% at 12% 0%, rgba(97, 242, 202, .16) 0%, rgba(97, 242, 202, 0) 46%),
    radial-gradient(90% 120% at 92% 100%, rgba(25, 145, 109, .22) 0%, rgba(4, 24, 18, 0) 60%),
    var(--bg-deep);
  border: 1px solid #24352F; border-radius: 18px;
  padding: 52px 40px; margin: 8px 0 40px;
}
.hero-kicker {
  font-size: .8rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase;
  color: var(--primary); margin-bottom: 14px;
}
.hero-title {
  font-family: var(--font-display); font-size: 2.6rem; line-height: 1.25;
  font-weight: 800; letter-spacing: .01em; margin-bottom: 6px;
}
.hero-title span { display: block; font-family: var(--font-body); font-size: 1.5rem; font-weight: 700; margin-top: 8px; color: #EAEAEA; }
.hero-sub { color: #B9B9B9; max-width: 46em; margin: 16px 0 8px; }
.hero-meta { color: var(--accent); font-size: .92rem; font-weight: 600; margin-bottom: 24px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 11px 24px; border-radius: 10px; font-weight: 700; font-size: .95rem; }
.btn-primary { background: var(--primary); color: #08120F; border: 1.5px solid var(--primary); }
.btn-primary:hover { background: var(--accent); border-color: var(--accent); text-decoration: none; }
.btn-ghost { border: 1.5px solid #3E4A46; color: #E8E8E8; }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); text-decoration: none; }

h1.page-title { font-size: 1.75rem; line-height: 1.45; font-weight: 800; margin: 6px 0 22px; }
h2 {
  font-size: 1.28rem; margin: 38px 0 14px; padding-left: 13px;
  border-left: 4px solid var(--primary); font-weight: 700;
}
h3 { font-size: 1.06rem; margin: 24px 0 10px; color: var(--accent); }
article p { margin: 13px 0; color: #DEDEDE; }
article ul, article ol { margin: 13px 0 13px 24px; }
article li { margin: 7px 0; color: #DEDEDE; }
article strong { color: #FFFFFF; }
code { background: #101815; color: var(--primary); padding: 2px 6px; border-radius: 5px;
  font-family: ui-monospace, Consolas, monospace; font-size: .88em; }

.feature-grid { list-style: none; display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; margin: 18px 0; }
.feature-grid li { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 15px 17px; }
.feature-grid strong { display: block; color: var(--primary); margin-bottom: 4px; }
.feature-grid span { color: var(--sub); font-size: .9rem; }

.steps { list-style: none; counter-reset: step; margin: 18px 0; }
.steps li { counter-increment: step; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 15px 17px 15px 54px; margin: 10px 0; position: relative; color: #DEDEDE; }
.steps li::before { content: counter(step); position: absolute; left: 15px; top: 15px;
  width: 26px; height: 26px; border-radius: 50%; background: var(--primary); color: #08120F;
  font-weight: 800; display: flex; align-items: center; justify-content: center; font-size: .84rem; }

.nav-grid, .toc-list { list-style: none; margin: 18px 0; }
.nav-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(310px, 1fr)); gap: 12px; }
.nav-grid li, .toc-list li { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 15px 17px; transition: border-color .16s, background .16s; }
.nav-grid li:hover, .toc-list li:hover { border-color: var(--primary); background: var(--panel-2); }
.nav-grid a, .toc-list a { font-weight: 700; display: block; margin-bottom: 4px; color: var(--fg); }
.nav-grid a:hover, .toc-list a:hover { color: var(--primary); }
.nav-grid span, .toc-list span { color: var(--sub); font-size: .9rem; display: block; }
.toc-list li { margin: 10px 0; }

/* 栏目子页列表（自动生成） */
.child-grid { list-style: none; display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 12px; margin: 18px 0; }
.child-grid li { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 15px 17px; }
.child-grid li:hover { border-color: var(--primary); background: var(--panel-2); }
.child-grid a { font-weight: 700; color: var(--fg); display: block; margin-bottom: 4px; }
.child-grid a:hover { color: var(--primary); }
.child-grid span { color: var(--sub); font-size: .88rem; display: block; }

details { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 13px 17px; margin: 11px 0; }
details summary { cursor: pointer; font-weight: 600; color: #ECECEC; }
details[open] summary { color: var(--primary); margin-bottom: 6px; }
details p { color: #B9B9B9; font-size: .95rem; }
.faq-home h3 { margin-top: 30px; }
.more-link { font-weight: 700; }

table { width: 100%; border-collapse: collapse; margin: 18px 0; background: var(--panel);
  border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; font-size: .92rem; }
th { background: #1E2A26; color: var(--primary); text-align: left; padding: 11px 13px; border-bottom: 1px solid var(--border); font-weight: 700; }
td { padding: 11px 13px; border-bottom: 1px solid #262B29; color: #D6D6D6; vertical-align: top; }
tr:last-child td { border-bottom: none; }

.site-footer { background: #0E0E0E; color: var(--sub); padding: 40px 0; margin-top: 48px; font-size: .87rem; border-top: 1px solid var(--border); }
.site-footer a { color: #CFCFCF; }
.site-footer a:hover { color: var(--primary); }
.site-footer p { margin: 7px 0; }
.footer-cols { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 18px; margin-bottom: 20px; }
.footer-cols h4 { font-size: .95rem; color: var(--primary); margin-bottom: 8px; }
.footer-cols ul { list-style: none; }
.footer-cols li { margin: 5px 0; }

@media (max-width: 720px) {
  .header-inner { height: auto; padding: 10px 0; flex-direction: column; align-items: flex-start; }
  .nav-rows { align-items: flex-start; }
  .site-nav { justify-content: flex-start; }
  .site-nav a { padding: 4px 7px; font-size: .84rem; }
  .site-nav-sub a { font-size: .74rem; }
  .hero { padding: 30px 22px; }
  .hero-title { font-size: 1.9rem; }
  h1.page-title { font-size: 1.42rem; }
}