/* Chromium 便携版构建 — 站点样式
   设计要点：
   - 全部使用系统字体，不引入任何外部资源（国内访问 fonts.googleapis.com 基本超时）
   - 亮色 / 暗色双主题：跟随系统，并允许右上角按钮覆盖（[data-theme] 必须赢过媒体查询）
   - 每个浏览器的品牌色通过 --accent 注入到卡片，负责描边、顶线、徽标与图标底色
*/

:root {
  color-scheme: light;

  --bg: #fbfbfc;
  --bg-grid: rgba(16, 20, 28, 0.028);
  --surface: #ffffff;
  --surface-2: #f4f5f7;
  --border: rgba(16, 20, 28, 0.1);
  --border-strong: rgba(16, 20, 28, 0.16);

  --text: #14161b;
  --text-2: #4b525c;
  --text-3: #666d78;

  --accent: #2f6feb;
  --accent-soft: color-mix(in srgb, var(--accent) 12%, transparent);
  --accent-ink: color-mix(in srgb, var(--accent) 82%, #000000);
  --accent-line: color-mix(in srgb, var(--accent) 70%, transparent);

  --btn-solid-bg: #17191f;
  --btn-solid-text: #ffffff;

  --shadow-sm: 0 1px 2px rgba(16, 20, 28, 0.04);
  --shadow-md: 0 12px 32px -12px rgba(16, 20, 28, 0.18);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;

  --page: 1120px;
  --gutter: clamp(20px, 5vw, 40px);
  --section-gap: clamp(64px, 9vw, 104px);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI Variable Text", "Segoe UI",
    "PingFang SC", "PingFang TC", "Hiragino Sans GB", "Hiragino Sans", "Microsoft YaHei UI",
    "Microsoft YaHei", "Microsoft JhengHei UI", "Microsoft JhengHei", "Yu Gothic UI", "Yu Gothic",
    "Noto Sans JP", system-ui, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "JetBrains Mono", Consolas, "Liberation Mono", monospace;
}

/* 暗色令牌：抽成一个自定义属性块，供媒体查询与显式主题共用 */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;

    --bg: #0b0c0f;
    --bg-grid: rgba(255, 255, 255, 0.028);
    --surface: #131519;
    --surface-2: #1a1d23;
    --border: rgba(255, 255, 255, 0.1);
    --border-strong: rgba(255, 255, 255, 0.18);

    --text: #eceef2;
    --text-2: #a9b0bb;
    --text-3: #8a919c;

    --accent: #6f9dff;
    --accent-ink: color-mix(in srgb, var(--accent) 88%, #ffffff);

    --btn-solid-bg: #eceef2;
    --btn-solid-text: #14161b;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 16px 40px -16px rgba(0, 0, 0, 0.7);
  }
}

:root[data-theme="dark"] {
  color-scheme: dark;

  --bg: #0b0c0f;
  --bg-grid: rgba(255, 255, 255, 0.028);
  --surface: #131519;
  --surface-2: #1a1d23;
  --border: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.18);

  --text: #eceef2;
  --text-2: #a9b0bb;
  --text-3: #8a919c;

  --accent: #6f9dff;
  --accent-ink: color-mix(in srgb, var(--accent) 88%, #ffffff);

  --btn-solid-bg: #eceef2;
  --btn-solid-text: #14161b;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 16px 40px -16px rgba(0, 0, 0, 0.7);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background-color: var(--bg);
  background-image: linear-gradient(var(--bg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px);
  background-size: 44px 44px;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.25;
  letter-spacing: -0.012em;
  font-weight: 650;
  text-wrap: balance;
}

p {
  margin: 0;
  text-wrap: pretty;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 20;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  font-weight: 600;
}

.skip-link:focus {
  left: 16px;
}

/* ---------------------------------------------------------------- 页头 */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.6) blur(12px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 16px;
  width: min(100%, var(--page));
  margin: 0 auto;
  padding: 12px var(--gutter);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.brand__mark {
  width: 30px;
  height: 30px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav__link {
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-2);
  font-size: 0.92rem;
  font-weight: 550;
  transition: background-color 150ms ease, color 150ms ease;
}

.nav__link:hover {
  background: var(--surface-2);
  color: var(--text);
}

.nav__link[aria-current="page"] {
  color: var(--text);
  background: var(--surface-2);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
}

.lang-switch__link {
  min-width: 2rem;
  padding: 4px 8px;
  border-radius: 6px;
  color: var(--text-3);
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.02em;
  text-align: center;
  transition: background-color 150ms ease, color 150ms ease;
}

.lang-switch__link:hover {
  color: var(--text);
  background: var(--surface-2);
}

.lang-switch__link[aria-current="true"] {
  color: var(--text);
  background: var(--surface-2);
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text-2);
  cursor: pointer;
  transition: color 150ms ease, border-color 150ms ease;
}

.theme-toggle:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.theme-toggle svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-toggle__moon {
  display: none;
}

:root[data-theme="dark"] .theme-toggle__sun {
  display: none;
}

:root[data-theme="dark"] .theme-toggle__moon {
  display: block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle__sun {
    display: none;
  }

  :root:not([data-theme="light"]) .theme-toggle__moon {
    display: block;
  }
}

/* ---------------------------------------------------------------- 布局 */

main {
  width: min(100%, var(--page));
  margin: 0 auto;
  padding: 0 var(--gutter) clamp(72px, 10vw, 120px);
}

.section {
  margin-top: var(--section-gap);
  scroll-margin-top: 80px;
}

.section__head {
  max-width: 62ch;
  margin-bottom: 28px;
}

.section__head h2 {
  font-size: clamp(1.5rem, 2.6vw, 1.95rem);
}

.section__head p {
  margin-top: 10px;
  color: var(--text-2);
}

.eyebrow {
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---------------------------------------------------------------- 首屏 */

.hero {
  padding: clamp(56px, 9vw, 96px) 0 0;
}

.hero h1 {
  max-width: 16ch;
  margin-top: 18px;
  font-size: clamp(2.25rem, 6.2vw, 3.65rem);
  font-weight: 700;
  letter-spacing: -0.028em;
}

.hero__lede {
  max-width: 58ch;
  margin-top: 20px;
  color: var(--text-2);
  font-size: clamp(1rem, 1.5vw, 1.12rem);
}

.hero__note {
  max-width: 62ch;
  margin-top: 14px;
  padding-left: 14px;
  border-left: 2px solid var(--accent-line);
  color: var(--text-3);
  font-size: 0.94rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.hero--page {
  padding-top: clamp(24px, 4vw, 40px);
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(48px, 7vw, 72px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--border);
  overflow: hidden;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 20px;
  background: var(--surface);
}

.stat__value {
  font-size: 1.55rem;
  font-weight: 680;
  letter-spacing: -0.02em;
}

.stat__label {
  font-size: 0.92rem;
  font-weight: 600;
}

.stat__detail {
  color: var(--text-3);
  font-size: 0.84rem;
  line-height: 1.55;
}

/* ---------------------------------------------------------------- 按钮 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 15px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease,
    transform 150ms ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background: var(--btn-solid-bg);
  color: var(--btn-solid-text);
}

.btn--primary:hover {
  background: color-mix(in srgb, var(--btn-solid-bg) 88%, var(--accent));
}

.btn--soft {
  border-color: var(--border-strong);
  background: var(--surface);
  color: var(--text);
}

.btn--soft:hover {
  background: var(--surface-2);
}

.btn--quiet {
  color: var(--text-2);
}

.btn--quiet:hover {
  background: var(--surface-2);
  color: var(--text);
}

.btn--lg {
  min-height: 44px;
  padding: 0 20px;
  font-size: 0.96rem;
}

/* ---------------------------------------------------------------- 构建卡片 */

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
}

.filter {
  min-height: 34px;
  padding: 0 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--text-2);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease;
}

.filter:hover {
  border-color: var(--border-strong);
  color: var(--text);
}

.filter.is-active {
  background: var(--btn-solid-bg);
  border-color: var(--btn-solid-bg);
  color: var(--btn-solid-text);
}

.build-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 16px;
}

.build-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.build-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 25%, transparent));
}

.build-card:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 38%, var(--border));
  box-shadow: var(--shadow-md);
}

.build-card.is-hidden {
  display: none;
}

.build-card__head {
  display: flex;
  align-items: center;
  gap: 12px;
}

.build-card__icon {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  padding: 6px;
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
}

.build-card__title {
  flex: 1;
  min-width: 0;
}

.build-card__title h3 {
  font-size: 1.12rem;
}

.build-card__title p {
  margin-top: 2px;
  color: var(--text-3);
  font-size: 0.84rem;
}

.pill {
  flex: 0 0 auto;
  padding: 3px 10px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  color: var(--accent-ink);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
}

.build-card__summary {
  flex: 1;
  margin: 16px 0 18px;
  color: var(--text-2);
  font-size: 0.94rem;
}

/* 两列而不是四列：版本号是 14 个字符的点分四段串，四列会把它折成两行 */
.build-card__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 16px;
  margin: 0 0 18px;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.build-card__meta dt {
  color: var(--text-3);
  font-size: 0.72rem;
  font-weight: 600;
}

.build-card__meta dd {
  margin: 3px 0 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 550;
  overflow-wrap: anywhere;
}

/* 固定成「主按钮独占一行 + 两个次级按钮并排」，避免不同版本号长度
   导致每张卡片的按钮换行位置各不相同 */
.build-card__actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.build-card__actions .btn--primary {
  grid-column: 1 / -1;
}

.build-card__version {
  padding: 1px 6px;
  border-radius: 5px;
  background: color-mix(in srgb, var(--btn-solid-text) 16%, transparent);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
}

/* ---------------------------------------------------------------- 信任 / 特性 / 仓库 */

.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.trust-card {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.trust-card h3 {
  font-size: 1rem;
}

.trust-card p {
  margin-top: 8px;
  color: var(--text-2);
  font-size: 0.92rem;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 10px 28px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  position: relative;
  padding-left: 26px;
  color: var(--text-2);
  font-size: 0.95rem;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.66em;
  width: 9px;
  height: 5px;
  border-left: 1.8px solid var(--accent);
  border-bottom: 1.8px solid var(--accent);
  transform: rotate(-45deg);
}

.repo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.repo-card {
  display: flex;
  flex-direction: column;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  transition: border-color 180ms ease;
}

.repo-card:hover {
  border-color: var(--border-strong);
}

.repo-card__head {
  display: flex;
  align-items: center;
  gap: 12px;
}

.repo-card__head h3 {
  font-size: 1rem;
  font-family: var(--font-mono);
  font-weight: 600;
}

.repo-card__head p {
  color: var(--text-3);
  font-size: 0.82rem;
}

.repo-card__summary {
  flex: 1;
  margin: 14px 0 16px;
  color: var(--text-2);
  font-size: 0.92rem;
}

.repo-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.88rem;
  font-weight: 600;
}

.repo-card__links a {
  color: var(--text-2);
  border-bottom: 1px solid var(--border-strong);
  padding-bottom: 1px;
  transition: color 150ms ease, border-color 150ms ease;
}

.repo-card__links a:hover {
  color: var(--accent-ink);
  border-color: var(--accent);
}

/* ---------------------------------------------------------------- 正文 */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 24px;
  color: var(--text-3);
  font-size: 0.86rem;
}

.breadcrumb a {
  color: var(--text-2);
}

.breadcrumb a:hover {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose {
  max-width: 68ch;
  margin-top: var(--section-gap);
}

.prose + .prose {
  margin-top: clamp(40px, 5vw, 56px);
}

.prose h2 {
  font-size: clamp(1.4rem, 2.4vw, 1.75rem);
  margin-bottom: 16px;
}

.prose p {
  margin-top: 14px;
  color: var(--text-2);
}

.prose__list,
.prose__steps {
  margin: 16px 0 0;
  padding-left: 0;
  color: var(--text-2);
}

.prose__list {
  list-style: none;
}

.prose__list li {
  position: relative;
  padding-left: 20px;
  margin-top: 8px;
}

.prose__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.72em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.prose__steps {
  counter-reset: step;
  list-style: none;
}

.prose__steps li {
  position: relative;
  padding-left: 34px;
  margin-top: 12px;
}

.prose__steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0.18em;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
}

.code {
  max-width: 68ch;
  margin: 0;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.6;
  overflow-x: auto;
}

.note {
  margin-top: 12px;
  color: var(--text-3);
  font-size: 0.88rem;
}

/* ---------------------------------------------------------------- FAQ */

.faq {
  max-width: 76ch;
  border-top: 1px solid var(--border);
}

.faq__item {
  border-bottom: 1px solid var(--border);
}

.faq__item summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

.faq__item summary::-webkit-details-marker {
  display: none;
}

.faq__item summary::after {
  content: "";
  flex: 0 0 auto;
  margin-left: auto;
  width: 8px;
  height: 8px;
  border-right: 1.8px solid var(--text-3);
  border-bottom: 1.8px solid var(--text-3);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform 200ms ease;
}

.faq__item[open] summary::after {
  transform: rotate(-135deg) translate(-2px, -2px);
}

.faq__item summary:hover {
  color: var(--accent-ink);
}

.faq__answer {
  padding: 0 0 18px;
  color: var(--text-2);
  font-size: 0.95rem;
}

/* ---------------------------------------------------------------- 页脚 */

.site-footer {
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 60%, transparent);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 40px;
  width: min(100%, var(--page));
  margin: 0 auto;
  padding: 48px var(--gutter);
}

.site-footer__tagline {
  max-width: 46ch;
  color: var(--text-2);
  font-size: 0.92rem;
}

.site-footer__stamp {
  margin-top: 10px;
  color: var(--text-3);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

.site-footer h2 {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-3);
}

.site-footer ul {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
  font-size: 0.9rem;
}

.site-footer a {
  color: var(--text-2);
}

.site-footer a:hover {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.site-footer__credits li {
  display: flex;
  flex-direction: column;
}

.site-footer__credits span {
  color: var(--text-3);
  font-size: 0.76rem;
}

/* ---------------------------------------------------------------- 响应式 */

@media (max-width: 900px) {
  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 640px) {
  .site-header__inner {
    flex-wrap: wrap;
    gap: 10px;
  }

  .nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .nav__link {
    padding: 6px 10px;
  }

  .build-grid {
    grid-template-columns: 1fr;
  }

  .build-card__meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .build-card__actions .btn {
    flex: 1 1 auto;
  }

  .stats {
    grid-template-columns: 1fr;
  }

  .hero__actions .btn {
    flex: 1 1 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}