/* Clash for Mac —— 基础层:设计令牌 / 重置 / 排版 / 头尾 / 通用面板
   风格方向:Fluent 亮面(Win11 质感)——柔和云雾底、发丝描边卡片、
   小圆角控件、亮度分层海拔;强调色只落在下载按钮 / 箭头链接 / 枢轴指示条。 */

:root {
  /* 颜色 */
  --c-page: #FFFFFF;
  --c-mica: #F5F5F7;
  --c-mica-2: #EAECF0;
  --c-hairline: #D9DBE1;
  --c-accent: #2E63C9;
  --c-accent-press: #1F4A9E;
  --c-onaccent: #FFFFFF;
  --c-ink: #1D1D21;
  --c-ink-soft: #6E6E76;
  --c-good: #1F8A4C;
  --c-warn: #B7791F;
  --c-bad: #C43B3B;

  /* 浅底(语义色 ~10% 洗色) */
  --tint-accent: rgba(46, 99, 201, 0.09);
  --tint-good: rgba(31, 138, 76, 0.10);
  --tint-warn: rgba(183, 121, 31, 0.12);
  --tint-bad: rgba(196, 59, 59, 0.10);

  /* 云雾光斑(Hero 氛围) */
  --bloom-core: rgba(46, 99, 201, 0.14);
  --bloom-mid: rgba(46, 99, 201, 0.06);
  --bloom-zero: rgba(46, 99, 201, 0);

  /* 覆层 */
  --glaze-hi: rgba(255, 255, 255, 0.35);
  --veil: rgba(29, 29, 33, 0.34);
  --topbar-glass: rgba(255, 255, 255, 0.82);

  /* 海拔(亮面 Fluent:越浮起阴影越柔) */
  --elev-1: 0 1px 2px rgba(29, 29, 33, 0.05), 0 2px 6px rgba(29, 29, 33, 0.05);
  --elev-2: 0 2px 4px rgba(29, 29, 33, 0.05), 0 10px 24px rgba(29, 29, 33, 0.08);
  --elev-3: 0 6px 14px rgba(29, 29, 33, 0.07), 0 24px 48px rgba(29, 29, 33, 0.10);
  --elev-accent: 0 4px 14px rgba(46, 99, 201, 0.30);

  /* 字体 */
  --ff-title: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --ff-body: 'Inter', 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --ff-mono: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;

  /* 圆角(Win11 尺度:窗 12 / 卡 8 / 控件 6) */
  --r-win: 12px;
  --r-card: 8px;
  --r-ctl: 6px;
  --r-xs: 4px;
  --r-pill: 999px;

  /* 版式 */
  --frame-w: 1120px;
  --read-w: 820px;
  --gutter: clamp(16px, 4vw, 40px);
  --lh-body: 1.9;
  --topbar-h: 64px;
}

/* ---------- 重置 ---------- */

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

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

html.nav-open { overflow: hidden; }

body {
  margin: 0;
  background: var(--c-page);
  color: var(--c-ink);
  font-family: var(--ff-body);
  font-size: 16px;
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
}

img,
svg { max-width: 100%; height: auto; vertical-align: middle; }

button { font-family: inherit; }

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

::selection { background: var(--tint-accent); }

:focus-visible {
  outline: 2px solid var(--c-accent-press);
  outline-offset: 2px;
}

/* ---------- 排版 ---------- */

h1, h2, h3, h4 {
  font-family: var(--ff-title);
  line-height: 1.25;
  margin: 0 0 0.6em;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 700; }
h3 { font-size: 1.2rem; font-weight: 700; }
h4 { font-size: 1.02rem; font-weight: 700; }

p { margin: 0 0 1.1em; }

small { font-size: 0.85em; color: var(--c-ink-soft); }

hr {
  border: 0;
  border-top: 1px solid var(--c-hairline);
  margin: 2.4em 0;
}

code {
  font-family: var(--ff-mono);
  font-size: 0.86em;
  background: var(--c-mica-2);
  border-radius: var(--r-xs);
  padding: 0.12em 0.42em;
}

pre {
  background: var(--c-mica-2);
  border: 1px solid var(--c-hairline);
  border-radius: var(--r-card);
  padding: 16px 20px;
  overflow-x: auto;
  line-height: 1.7;
  margin: 0 0 1.4em;
}

pre code {
  background: none;
  padding: 0;
  font-size: 0.88rem;
}

blockquote {
  margin: 1.4em 0;
  padding: 4px 20px;
  border-left: 3px solid var(--c-hairline);
  color: var(--c-ink-soft);
}

/* 正文容器(文章/文档) */
.prose { max-width: var(--read-w); }
.prose h2 { margin-top: 2.2em; }
.prose h3 { margin-top: 1.8em; }
.prose ul,
.prose ol { padding-left: 1.4em; margin: 0 0 1.2em; }
.prose li { margin-bottom: 0.4em; }
.prose a {
  color: var(--c-ink);
  text-decoration: underline;
  text-decoration-color: var(--c-hairline);
  text-underline-offset: 3px;
}
.prose a:hover { text-decoration-color: var(--c-ink); }

/* ---------- 版心与分区 ---------- */

.frame {
  width: 100%;
  max-width: calc(var(--frame-w) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.frame--read {
  max-width: calc(var(--read-w) + var(--gutter) * 2);
}

/* 分区节奏:只声明纵向 padding,严禁简写覆盖横向留白 */
.band {
  padding-top: clamp(56px, 8vw, 96px);
  padding-bottom: clamp(56px, 8vw, 96px);
}

.band--mica { background: var(--c-mica); }

.band--tight {
  padding-top: clamp(32px, 5vw, 56px);
  padding-bottom: clamp(32px, 5vw, 56px);
}

.band-kicker {
  font-family: var(--ff-mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-ink-soft);
  margin: 0 0 10px;
}

.band-title { margin-bottom: 0.5em; }

.band-lead {
  color: var(--c-ink-soft);
  max-width: 44em;
  margin-bottom: 2em;
}

/* 通用网格(子项防溢出) */
.auto-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.auto-grid > * { min-width: 0; }

/* ---------- 按钮与链接 ---------- */

.fx-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 22px;
  border-radius: var(--r-ctl);
  border: 1px solid transparent;
  font-family: var(--ff-body);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

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

.fx-btn--accent {
  background: var(--c-accent);
  border-color: var(--c-accent-press);
  color: var(--c-onaccent);
  box-shadow: inset 0 1px 0 var(--glaze-hi), var(--elev-accent);
}

.fx-btn--accent:hover { background: var(--c-accent-press); }

.fx-btn--ghost {
  background: var(--c-page);
  border-color: var(--c-hairline);
  color: var(--c-ink);
  box-shadow: var(--elev-1);
}

.fx-btn--ghost:hover { background: var(--c-mica); }

.fx-btn--sm {
  min-height: 34px;
  padding: 0 14px;
  font-size: 0.85rem;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.btn-row--center { justify-content: center; }

/* 箭头链接(强调色允许位) */
.more-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--c-accent);
  font-weight: 600;
  font-size: 0.95rem;
}

.more-link::after {
  content: "\2192";
  transition: transform 0.18s ease;
}

.more-link:hover { color: var(--c-accent-press); }
.more-link:hover::after { transform: translateX(4px); }

/* 事实小胶囊 */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--r-pill);
  border: 1px solid var(--c-hairline);
  background: var(--c-mica);
  font-size: 0.82rem;
  color: var(--c-ink-soft);
  white-space: nowrap;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 18px;
}

/* ---------- 通用卡片 ---------- */

.tile {
  background: var(--c-page);
  border: 1px solid var(--c-hairline);
  border-radius: var(--r-card);
  box-shadow: var(--elev-1);
  padding: 22px 24px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.tile:hover {
  box-shadow: var(--elev-2);
  transform: translateY(-2px);
}

/* ---------- 表格 ---------- */

.sheet-scroll { overflow-x: auto; margin: 0 0 1.4em; }

.sheet {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  font-size: 0.92rem;
  background: var(--c-page);
  border: 1px solid var(--c-hairline);
  border-radius: var(--r-card);
}

.sheet th,
.sheet td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--c-hairline);
  text-align: left;
  line-height: 1.6;
}

.sheet th {
  background: var(--c-mica);
  font-weight: 700;
  white-space: nowrap;
}

.sheet tr:last-child td { border-bottom: 0; }

/* ---------- 顶栏 ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--c-page);
  border-bottom: 1px solid var(--c-hairline);
}

@supports (backdrop-filter: blur(14px)) {
  .topbar {
    background: var(--topbar-glass);
    backdrop-filter: blur(14px) saturate(1.4);
  }
}

.topbar-in {
  display: flex;
  align-items: center;
  min-height: var(--topbar-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  flex-shrink: 0;
}

.brand-mark { flex-shrink: 0; }

.mainnav {
  display: flex;
  align-items: center;
  gap: clamp(4px, 1.4vw, 14px);
  margin-left: clamp(16px, 3vw, 40px);
}

.mainnav-link {
  display: block;
  padding: 8px 11px;
  border-radius: var(--r-ctl);
  color: var(--c-ink-soft);
  font-size: 0.94rem;
  font-weight: 500;
  white-space: nowrap;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.mainnav-link:hover {
  background: var(--c-mica);
  color: var(--c-ink);
}

.mainnav-link.is-here {
  color: var(--c-ink);
  font-weight: 700;
}

.topbar-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

/* 语言下拉 */
.langbox { position: relative; }

.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--c-hairline);
  border-radius: var(--r-ctl);
  background: var(--c-page);
  color: var(--c-ink);
  font-size: 0.88rem;
  cursor: pointer;
}

.lang-btn:hover { background: var(--c-mica); }

.lang-btn svg {
  flex-shrink: 0;
  transition: transform 0.18s ease;
}

.langbox.open .lang-btn svg { transform: rotate(180deg); }

.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  min-width: 152px;
  margin: 0;
  padding: 6px;
  list-style: none;
  background: var(--c-page);
  border: 1px solid var(--c-hairline);
  border-radius: var(--r-card);
  box-shadow: var(--elev-2);
  display: none;
  z-index: 50;
}

.langbox.open .lang-menu { display: block; }

.lang-item {
  display: block;
  padding: 9px 12px;
  border-radius: var(--r-ctl);
  font-size: 0.9rem;
  color: var(--c-ink);
}

.lang-item:hover { background: var(--c-mica); }

.lang-item.is-cur {
  font-weight: 700;
  background: var(--c-mica);
}

/* 汉堡按钮 */
.burger {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  background: none;
  border: 1px solid transparent;
  border-radius: var(--r-ctl);
  cursor: pointer;
}

.burger:hover { background: var(--c-mica); }

.burger-bar {
  width: 20px;
  height: 2px;
  border-radius: var(--r-pill);
  background: var(--c-ink);
  flex-shrink: 0;
}

/* 抽屉遮罩 */
.nav-veil {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--veil);
  z-index: 30;
}

.nav-veil[hidden] { display: none; }

/* ---------- Hero「云雾开场」 ---------- */

.opening {
  position: relative;
  overflow: hidden;
  text-align: center;
  background: linear-gradient(180deg, var(--c-mica) 0%, var(--c-page) 58%);
  padding-top: clamp(64px, 11vh, 128px);
  padding-bottom: clamp(56px, 9vh, 104px);
}

.opening-bloom {
  position: absolute;
  left: 56%;
  bottom: -36%;
  width: 90vw;
  height: 58vw;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, var(--bloom-core), var(--bloom-mid) 46%, var(--bloom-zero) 74%);
  pointer-events: none;
  animation: bloom-breath 12s ease-in-out infinite;
}

@keyframes bloom-breath {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 1; }
}

.opening-in { position: relative; }

.opening-logo {
  display: inline-block;
  margin-bottom: 22px;
  flex-shrink: 0;
}

.opening-title {
  font-size: clamp(3rem, 8.5vw, 6.5rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.04;
  margin: 0 0 0.35em;
}

/* 副句按用户意见做小号处理,不与主句同尺度 */
.opening-sub {
  font-size: clamp(1.02rem, 1.5vw, 1.3rem);
  font-weight: 400;
  color: var(--c-ink-soft);
  max-width: 38em;
  margin: 0 auto 1.8em;
}

.opening-sub strong {
  color: var(--c-ink);
  font-weight: 600;
}

.opening-scene {
  margin: 40px auto 0;
  max-width: 560px;
}

.opening-scene img {
  width: 100%;
  border-radius: var(--r-win);
  opacity: 0.92;
}

/* ---------- 滚动淡入 ---------- */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.shown {
  opacity: 1;
  transform: none;
}

/* ---------- 页脚 ---------- */

.sitefoot {
  background: var(--c-mica);
  border-top: 1px solid var(--c-hairline);
  margin-top: clamp(56px, 8vw, 96px);
  font-size: 0.92rem;
}

.foot-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 1.5fr 0.9fr;
  gap: clamp(24px, 4vw, 48px);
  padding-top: clamp(40px, 6vw, 64px);
  padding-bottom: 36px;
}

.foot-grid > * { min-width: 0; }

.foot-brand-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  margin-bottom: 12px;
}

.foot-brand-row img { flex-shrink: 0; }

.foot-brand p {
  color: var(--c-ink-soft);
  font-size: 0.88rem;
  line-height: 1.8;
  margin: 0;
}

.foot-h {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-ink-soft);
  margin: 0 0 14px;
}

.foot-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.foot-list a { color: var(--c-ink-soft); }

.foot-list a:hover {
  color: var(--c-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.foot-hotwrap {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hot-chip {
  display: inline-block;
  padding: 4px 12px;
  border: 1px solid var(--c-hairline);
  border-radius: var(--r-pill);
  background: var(--c-page);
  font-size: 0.8rem;
  color: var(--c-ink-soft);
  white-space: nowrap;
}

.hot-chip:hover {
  color: var(--c-ink);
  border-color: var(--c-ink-soft);
}

.foot-base {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--c-hairline);
  padding-top: 20px;
  padding-bottom: 28px;
  color: var(--c-ink-soft);
  font-size: 0.84rem;
}

.foot-base a { color: var(--c-ink-soft); }

.foot-base a:hover {
  color: var(--c-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.foot-base-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
}

/* ---------- 响应式 ---------- */

@media (max-width: 960px) {
  .foot-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 880px) {
  .mainnav {
    display: none;
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    right: 0;
    z-index: 45;
    margin: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    background: var(--c-page);
    border-bottom: 1px solid var(--c-hairline);
    box-shadow: var(--elev-3);
    padding: 10px var(--gutter) 16px;
    max-height: calc(100dvh - var(--topbar-h));
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .mainnav.open { display: flex; }

  .mainnav-link {
    display: flex;
    align-items: center;
    width: 100%;
    min-height: 48px;
    padding: 12px 14px;
    font-size: 1rem;
    border-radius: var(--r-card);
  }

  .mainnav-link.is-here { background: var(--c-mica); }

  .burger { display: flex; }

  /* 窄屏工具区必须仍贴最右(导航收进抽屉后 auto 边距失效) */
  .topbar-tools { margin-left: auto; }
}

@media (max-width: 640px) {
  body { font-size: 15.5px; }

  .opening-title { letter-spacing: -0.02em; }

  .foot-grid { grid-template-columns: 1fr; gap: 28px; }

  .sheet { min-width: 480px; }
}

@media (max-width: 400px) {
  .fx-btn { padding: 0 16px; }
  .lang-btn { padding: 0 10px; }
}

/* ---------- 降级动效 ---------- */

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

  .opening-bloom { animation: none; opacity: 0.85; }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .fx-btn,
  .more-link::after,
  .tile { transition: none; }
}