:root {
  --brand: #12726b;
  --brand-dark: #0e5c56;
  --fg: #0f172a;
  --fg-muted: #64748b;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --border: #e2e8f0;
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --brand: #2aa79c;
    --brand-dark: #35c0b4;
    --fg: #e2e8f0;
    --fg-muted: #94a3b8;
    --bg: #0b1220;
    --bg-soft: #111a2b;
    --border: #1e293b;
  }
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, sans-serif;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}
a {
  color: var(--brand);
}
/* 键盘焦点统一可见（链接/按钮/语言切换/hash 复制钮）；
   outline 不改布局，不会造成抖动。faq summary 有内嵌特例（见下）。 */
a:focus-visible,
button:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--brand) 58%, transparent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ── 顶栏 ── */
header {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(8px);
  z-index: 10;
}
header .wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 60px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
  letter-spacing: -0.01em;
}
.brand img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}
.spacer {
  flex: 1;
}
.lang-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.lang-toggle a {
  display: block;
  background: transparent;
  color: var(--fg-muted);
  text-decoration: none;
  padding: 5px 11px;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
}
.lang-toggle a[aria-current="page"] {
  background: var(--brand);
  color: #fff;
}

/* ── Hero ── */
.hero {
  padding: 76px 0 56px;
  text-align: center;
}
.hero h1 {
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.25;
  margin: 0 0 14px;
  letter-spacing: -0.02em;
}
.hero p.sub {
  font-size: clamp(16px, 2.2vw, 19px);
  color: var(--fg-muted);
  margin: 0 0 34px;
}
.cta {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  /* 容器宽度恒定（三语最宽下载态 en 301px + 余量）：feed 回填后按钮
     以中心为锚变宽，容器零位移，CLS 归零。窄于容器时按钮居中不显得空。 */
  min-width: 320px;
}
.btn-primary {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  text-decoration: none;
  font-size: 16px;
  font-weight: 600;
  padding: 13px 30px;
  border-radius: var(--radius);
  transition: background 0.15s;
}
.btn-primary:hover {
  background: var(--brand-dark);
}
.meta {
  font-size: 13px;
  color: var(--fg-muted);
  /* 初始为空、feed 返回后才填版本与体积——预留一行高度，
     回填时下方内容零位移（CLS）。flex item 已块化，min-height 直接生效。 */
  min-height: 1.65em;
}
.meta a {
  color: var(--fg-muted);
}
.store-proof {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 22px;
}
.store-badge {
  display: inline-flex;
  line-height: 0;
  border-radius: 6px;
}
.store-badge img {
  display: block;
  width: min(200px, 48vw);
  height: auto;
}
.platform-proof {
  color: var(--fg-muted);
  font-size: 13px;
  white-space: nowrap;
}
.disclaimer {
  flex-basis: 100%;
  color: var(--fg-muted);
  font-size: 12px;
  line-height: 1.5;
}
@media (max-width: 520px) {
  .store-proof {
    flex-direction: column;
    gap: 8px;
  }
}

/* ── 通用区块 ── */
section {
  padding: 52px 0;
  border-top: 1px solid var(--border);
}
/* 锚点跳转（页脚「常见问题」、CTA「查看全部平台」）给 sticky 顶栏留位：
   没有它时目标顶边停在视口顶，标题被 60px 顶栏遮住，跳转看似「没效果」。 */
section[id] {
  scroll-margin-top: 76px;
}
/* 锚点目标反馈：高视口（竖屏）下目标区本就在视口内、跳转位移小甚至为零，
   只靠滚动用户感知不到「到了」。:target 命中时播放一次性竖条脉冲、自动淡出
   复位——不做常驻标记：replaceState 清 hash 后浏览器【不会】重评 :target，
   常驻样式会永远挂着（2026-08-26 实测）；一次性动画则必然自行消退。 */
section[id]:target h2 {
  animation: anchor-mark 5s ease-out forwards;
}
@keyframes anchor-mark {
  /* ~3.8s 可见保持 + ~1.2s 淡出复位 */
  0%,
  75% {
    padding-left: 12px;
    border-left: 4px solid var(--brand);
  }
  100% {
    padding-left: 0;
    border-left: 4px solid transparent;
  }
}
@media (prefers-reduced-motion: reduce) {
  section[id]:target h2 {
    animation: none;
  }
}
@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}
section h2 {
  font-size: 22px;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}
section .lead {
  color: var(--fg-muted);
  margin: 0 0 26px;
}

/* ── 三栏能力 ── */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 22px;
}
.feature h3 {
  font-size: 16px;
  margin: 0 0 6px;
}
.feature p {
  margin: 0;
  color: var(--fg-muted);
  font-size: 14.5px;
}
.feature .icon {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: color-mix(in srgb, var(--brand) 14%, transparent);
  color: var(--brand);
  display: grid;
  place-items: center;
  margin-bottom: 12px;
  font-size: 17px;
}

/* ── 产品截图 ── */
/* 刻意不设 aspect-ratio：让图片自身的宽高比说了算，避免容器与图不一致时
   出现letterbox 或裁切。width/height 属性写在标签上防止加载时布局跳动。 */
.shot {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

/* ── 能力详解：事实清单 + 真实产品表面 ── */
.detail-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}
.product-figures {
  display: grid;
  gap: 22px;
}
.product-figure {
  margin: 0;
}
.product-figure figcaption {
  margin-top: 9px;
  color: var(--fg-muted);
  font-size: 13px;
}
@media (max-width: 760px) {
  .detail-notes {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ── 下载表 ── */
.table-scroll {
  overflow-x: auto;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 720px;
}
th,
td {
  text-align: left;
  padding: 11px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
th {
  font-weight: 600;
  color: var(--fg-muted);
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
td.size {
  color: var(--fg-muted);
  white-space: nowrap;
}
td.format {
  color: var(--fg-muted);
  white-space: nowrap;
}
.hash {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  color: var(--fg-muted);
  word-break: break-all;
  cursor: pointer;
  border: 0;
  background: none;
  padding: 0;
  text-align: left;
}
.tag {
  display: inline-block;
  font-size: 11px;
  padding: 1px 7px;
  border-radius: 99px;
  background: color-mix(in srgb, var(--brand) 14%, transparent);
  color: var(--brand);
  margin-left: 6px;
  vertical-align: middle;
}
.tag-rec {
  background: var(--brand);
  color: #fff;
}

/* ── 安装提示 ── */
.notes {
  display: grid;
  gap: 16px;
}
.note {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}
.note h4 {
  margin: 0 0 5px;
  font-size: 14.5px;
}
.nico {
  color: var(--brand);
  margin-right: 6px;
}
.note p {
  margin: 0;
  font-size: 14px;
  color: var(--fg-muted);
}

/* ── 可选服务端增强 ── */
.server-addon-card {
  display: grid;
  gap: 20px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-soft);
}
.server-addon-card h2 {
  margin-bottom: 8px;
}
.server-addon-card p {
  max-width: 780px;
  margin: 0;
  color: var(--fg-muted);
}
.secondary-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.btn-secondary {
  display: inline-block;
  padding: 9px 15px;
  border: 1px solid var(--brand);
  border-radius: 8px;
  color: var(--brand);
  background: var(--bg);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition:
    background 0.15s,
    color 0.15s;
}
.btn-secondary:hover {
  color: var(--fg);
  background: color-mix(in srgb, var(--brand) 9%, var(--bg));
}
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: color-mix(in srgb, var(--fg) 8%, transparent);
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 0.9em;
}

/* ── 常见问题 ── */
.faq-list {
  display: grid;
  gap: 12px;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-soft);
  overflow: hidden;
}
.faq-item summary {
  position: relative;
  padding: 16px 48px 16px 18px;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  color: var(--brand);
  font-size: 22px;
  font-weight: 400;
  line-height: 1;
  transform: translateY(-50%);
}
.faq-item[open] summary::after {
  content: "−";
}
.faq-item summary:hover {
  background: color-mix(in srgb, var(--brand) 7%, transparent);
}
.faq-item summary:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--brand) 58%, transparent);
  outline-offset: -3px;
}
.faq-item p {
  margin: 0;
  padding: 0 18px 17px;
  color: var(--fg-muted);
  font-size: 14.5px;
}

/* ── 页脚 ── */
footer {
  border-top: 1px solid var(--border);
  padding: 30px 0 50px;
  font-size: 13.5px;
  color: var(--fg-muted);
}
footer .links {
  display: flex;
  justify-content: space-between;
  gap: 24px;
}
footer .links-main,
footer .links-utility {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}
footer .links-utility {
  justify-content: flex-end;
}
/* 版权行顶到行尾；窄屏 flex-wrap 落行后自然回到左侧，不用额外处理 */
footer .footer-meta {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-top: 10px;
}
@media (max-width: 600px) {
  footer .links {
    flex-direction: column;
    gap: 10px;
  }
  footer .links-utility {
    justify-content: flex-start;
  }
  footer .footer-meta {
    flex-direction: column;
    gap: 4px;
  }
  footer .copy {
    text-align: left;
  }
}

/* ── 法律页（privacy/terms，body.legal）── */
.legal {
  line-height: 1.75;
}
.legal .wrap {
  max-width: 760px;
}
.legal header {
  position: static;
  background: none;
  backdrop-filter: none;
}
.legal header .wrap {
  gap: 10px;
}
.legal header img {
  width: 26px;
  height: 26px;
  border-radius: 6px;
}
.legal header a {
  color: var(--fg);
  text-decoration: none;
  font-weight: 650;
}
.legal main {
  padding: 44px 0 70px;
}
.legal h1 {
  margin: 0 0 6px;
  font-size: 27px;
}
.legal h2 {
  margin: 38px 0 10px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 19px;
}
.legal h3 {
  margin: 22px 0 6px;
  font-size: 15.5px;
}
.legal p,
.legal li {
  font-size: 15px;
}
.legal ul,
.legal ol {
  padding-left: 22px;
}
.legal .dates {
  margin: 0 0 26px;
  color: var(--fg-muted);
  font-size: 14px;
}
.legal .callout {
  margin: 20px 0;
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--brand);
  border-radius: 8px;
  background: var(--bg-soft);
}
.legal .callout p {
  margin: 0;
}
.legal .lang-sep {
  margin: 64px 0 0;
  border: 0;
  border-top: 2px solid var(--border);
}
.legal footer {
  padding: 24px 0 46px;
}

/* ── 404（body.error-page）── */
.error-page {
  display: grid;
  place-items: center;
  min-height: 100vh;
  text-align: center;
}
.error-page img {
  width: 56px;
  height: 56px;
  border-radius: 14px;
}
.error-page h1 {
  font-size: 28px;
  margin: 18px 0 6px;
  letter-spacing: -0.02em;
}
.error-page p {
  color: var(--fg-muted);
  margin: 0 0 28px;
}