/* ============================================================
   Bolloon · 安装/下载页
   设计语言：炭黑 + lime（Bolloon 官方色令牌），编辑式展览排版
   ============================================================ */

:root {
  /* —— Bolloon 官方色令牌 (来自 src/web/style.css) —— */
  --bg: #12110f;          /* 页面深底 */
  --bg-2: #1a1a18;        /* 应用炭黑 */
  --bg-3: #222220;        /* 侧栏 */
  --bg-hover: #2a2a26;
  --ink: #e8e8dc;         /* 主文字 (暖米白) */
  --ink-2: #909088;       /* 次级 */
  --ink-3: #5c5c54;       /* 弱 */
  --lime: #c4d640;        /* 品牌强调 */
  --lime-hover: #d4e650;
  --lime-deep: #8a9430;
  --lime-glow: rgba(196, 214, 64, 0.25);
  --hairline: rgba(216, 216, 200, 0.14);
  --hairline-strong: rgba(216, 216, 200, 0.28);
  --paper: #f2efe6;       /* 暖纸 (用于反白小块) */

  --serif: "Noto Serif SC", "Songti SC", Georgia, serif;
  --sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, monospace;

  --maxw: 1180px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--ink);
  font-weight: 300;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--lime); text-decoration: none; }
a:hover { color: var(--lime-hover); }
code { font-family: var(--mono); }

/* —— 顶部导航（均布 + 子标签栏）—— */
.topnav {
  position: sticky; top: 0; z-index: 60;
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline);
}
.masthead {
  display: flex; align-items: center; justify-content: space-between;
  gap: clamp(20px, 3vw, 40px);
  padding: 18px clamp(24px, 5vw, 64px);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-family: var(--mono); flex-shrink: 0; }
.brand-mark { color: var(--lime); font-size: 22px; line-height: 1; text-shadow: 0 0 12px var(--lime-glow); }
.brand-word { font-size: 20px; font-weight: 600; letter-spacing: 0.5px; }
.mast-links { display: flex; align-items: center; justify-content: center; gap: clamp(22px, 3.5vw, 48px); flex: 1; }
.nav-item { position: relative; }
.mast-links > .nav-item > a,
.mast-links > a.nav-item {
  color: var(--ink-2); font-size: 16px; letter-spacing: 0.3px;
  display: inline-flex; align-items: center; padding: 9px 2px;
}
.mast-links > .nav-item > a:hover,
.mast-links > a.nav-item:hover { color: var(--lime); }
.mast-links a.is-active { color: var(--lime); }
.version-badge {
  font-family: var(--mono); font-size: 13px; color: var(--ink-2);
  padding: 4px 12px; border: 1px solid var(--hairline); border-radius: 2px; flex-shrink: 0;
}

/* —— 导航悬浮下拉 —— */
.nav-menu {
  position: absolute; top: 100%; left: 50%;
  transform: translateX(-50%) translateY(8px);
  display: flex; flex-direction: column; gap: 2px;
  width: max-content; min-width: 150px; padding: 8px 6px;
  background: var(--bg-3);
  border: 1px solid var(--hairline-strong);
  border-radius: 3px;
  box-shadow: 0 24px 60px rgba(0,0,0,0.5);
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
  z-index: 70;
}
.nav-item.has-menu:hover .nav-menu,
.nav-item.has-menu:focus-within .nav-menu {
  opacity: 1; visibility: visible; pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav-menu a { color: var(--ink-2); font-size: 14px; padding: 9px 14px; border-radius: 2px; }
.nav-menu a:hover { color: var(--lime); background: var(--bg-hover); }
.nav-menu-note {
  font-size: 12px; color: var(--ink-3); letter-spacing: 0.5px;
  padding: 2px 14px 9px; border-bottom: 1px solid var(--hairline);
  margin-bottom: 5px; white-space: normal; max-width: 190px;
}
a.cmd-plate, a.cmd-plate:hover { color: var(--ink); text-decoration: none; }
a.cmd-plate .cmd-title { color: var(--ink); }

/* —— 序厅 —— */
.intro {
  position: relative;
  min-height: calc(100vh - 108px);
  display: flex; align-items: center;
  padding: clamp(40px, 8vh, 120px) clamp(24px, 6vw, 80px);
  overflow: hidden;
}
.intro-inner { max-width: 720px; position: relative; z-index: 2; }
.kicker {
  font-family: var(--mono); font-size: 12px; letter-spacing: 3px;
  text-transform: uppercase; color: var(--lime);
  margin-bottom: 28px;
}
.display {
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(4rem, 15vw, 12rem);
  line-height: 0.9; letter-spacing: -0.03em;
  color: var(--ink);
}
.display .line { display: block; }
.lede {
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2.2vw, 1.65rem);
  color: var(--ink-2); margin-top: 30px; max-width: 30em;
}
.lede .hl { color: var(--lime); }
.intro-cta { display: flex; align-items: center; gap: 22px; margin-top: 44px; }
.quiet-cta {
  font-family: var(--mono); font-size: 14px; letter-spacing: 0.5px;
  color: var(--bg); background: var(--lime);
  padding: 12px 26px; border-radius: 2px;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}
.quiet-cta:hover { background: var(--lime-hover); transform: translateY(-1px); box-shadow: 0 6px 24px var(--lime-glow); color: var(--bg); }
.intro-note { font-family: var(--mono); font-size: 12px; color: var(--ink-3); letter-spacing: 1px; }

/* 序厅书法作品——偏移的展品 */
.intro-art {
  position: absolute; right: clamp(-80px, -4vw, -28px); top: 10%;
  width: clamp(220px, 30vw, 400px); z-index: 1; opacity: 0.92;
  pointer-events: none;
}
.intro-art img {
  width: 100%; border-radius: 2px;
  border: 1px solid var(--hairline);
  box-shadow: 0 30px 80px rgba(0,0,0,0.5);
  filter: saturate(1.05);
  transform: rotate(2deg);
}

/* —— 通用 section 头 —— */
section { padding: clamp(60px, 10vh, 130px) clamp(24px, 6vw, 80px); max-width: 1240px; margin: 0 auto; }
.section-head { margin-bottom: 56px; }
.section-head .kicker { margin-bottom: 18px; }
.section-title {
  font-family: var(--serif); font-weight: 300;
  font-size: clamp(2rem, 5vw, 3.6rem); letter-spacing: -0.01em;
  color: var(--ink);
}
.section-lede { color: var(--ink-2); margin-top: 16px; font-size: 1.05rem; max-width: 42em; }
.section-lede strong { color: var(--lime); font-weight: 500; }

/* —— 安装 —— */
.install { border-top: 1px solid var(--hairline); }
.os-switch {
  display: inline-flex; gap: 4px; margin-bottom: 28px;
  border: 1px solid var(--hairline); padding: 4px; border-radius: 3px;
}
.os-tab {
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.3px;
  color: var(--ink-2); background: transparent; border: none;
  padding: 8px 18px; border-radius: 2px; cursor: pointer;
  transition: background 0.2s, color 0.2s;
}
.os-tab:hover { color: var(--ink); }
.os-tab.is-active { background: var(--lime); color: var(--bg); font-weight: 500; }

.cmd-plate {
  border: 1px solid var(--hairline); border-radius: 3px;
  padding: 24px 26px; margin-bottom: 20px;
  background: linear-gradient(180deg, var(--bg-2), var(--bg-3));
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.cmd-plate:hover { border-color: var(--hairline-strong); box-shadow: 0 0 0 1px var(--lime-glow); }
.cmd-meta { display: flex; flex-direction: column; gap: 4px; margin-bottom: 14px; }
.cmd-badge {
  font-family: var(--mono); font-size: 10px; letter-spacing: 2px;
  text-transform: uppercase; color: var(--lime);
}
.cmd-title { font-family: var(--serif); font-weight: 400; font-size: 1.3rem; }
.cmd-desc { color: var(--ink-2); font-size: 0.95rem; }

.cmd-line {
  display: flex; align-items: center; gap: 12px;
  flex-wrap: wrap;
}
.prompt { font-family: var(--mono); color: var(--lime); font-weight: 600; }
.cmd {
  font-family: var(--mono); font-size: 0.95rem; flex: 1 1 auto; min-width: 200px;
  color: var(--ink); background: rgba(0,0,0,0.28);
  border: 1px solid var(--hairline); border-radius: 2px;
  padding: 12px 16px; word-break: break-all;
}
.copy {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.5px;
  color: var(--ink-2); background: transparent;
  border: 1px solid var(--hairline); border-radius: 2px;
  padding: 10px 16px; cursor: pointer; flex-shrink: 0;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.copy:hover { color: var(--lime); border-color: var(--lime); }
.copy.is-copied { color: var(--lime); border-color: var(--lime); background: var(--lime-glow); }

.prereq {
  margin-top: 26px; color: var(--ink-2); font-size: 0.92rem;
  padding-left: 16px; border-left: 2px solid var(--lime-deep);
}
.prereq code { color: var(--ink); font-size: 0.85em; }

/* —— 启动 —— */
.start { border-top: 1px solid var(--hairline); }
.cmd-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
.cmd-plate.mini { margin-bottom: 0; }
.cmd-plate.mini .cmd-line { margin-top: 0; }

/* —— 能力（编辑式列表）—— */
.capabilities { border-top: 1px solid var(--hairline); }
.cap-list { list-style: none; }
.cap-list li {
  display: flex; gap: clamp(20px, 4vw, 48px); align-items: baseline;
  padding: 30px 0; border-bottom: 1px solid var(--hairline);
}
.cap-list li:first-child { border-top: 1px solid var(--hairline); }
.cap-no {
  font-family: var(--mono); font-size: 13px; color: var(--lime);
  letter-spacing: 2px; flex-shrink: 0; width: 2.5em;
}
.cap-body {}
.cap-body h3 {
  font-family: var(--serif); font-weight: 400; font-size: clamp(1.3rem, 3vw, 2rem);
  margin-bottom: 6px;
}
.cap-body p { color: var(--ink-2); max-width: 38em; }

/* —— 关于/尾声 —— */
.about { border-top: 1px solid var(--hairline); }
.about-grid {
  display: grid; grid-template-columns: minmax(200px, 0.9fr) 1.4fr;
  gap: clamp(28px, 6vw, 80px); align-items: center;
}
.exhibit img {
  width: 100%; border-radius: 2px; border: 1px solid var(--hairline);
  box-shadow: 0 30px 70px rgba(0,0,0,0.5);
}
.about-text p { color: var(--ink-2); margin-bottom: 18px; max-width: 36em; }
.about-text strong { color: var(--ink); font-weight: 500; }
.about-links { margin-top: 8px; font-family: var(--mono); font-size: 0.85rem; display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.about-links code { color: var(--ink); }
.dot { color: var(--ink-3); }

/* —— 页脚 —— */
.foot {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 28px clamp(24px, 6vw, 80px);
  border-top: 1px solid var(--hairline);
  color: var(--ink-3); font-family: var(--mono); font-size: 12px;
}
.foot-sep { color: var(--ink-3); }
.foot-right { margin-left: auto; color: var(--ink-3); }
.foot .foot-right::after { content: " ◍"; color: var(--lime); }

/* —— 滚动揭示（reduced-motion 会降级）—— */
.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.9s ease, transform 0.9s ease; }
.js .reveal.in { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .intro-art img { transform: none; }
}

/* —— 响应式 —— */
@media (max-width: 820px) {
  .intro-art { position: static; width: min(70vw, 300px); margin-top: 34px; opacity: 0.9; }
  .intro { flex-direction: column; align-items: flex-start; }
  .cap-list li { flex-direction: column; gap: 8px; }
  .about-grid { grid-template-columns: 1fr; }
  .mast-links { gap: 12px; }
}

/* —— 次级 CTA（幽灵按钮） —— */
.quiet-cta.ghost {
  color: var(--ink); background: transparent;
  border: 1px solid var(--hairline-strong);
}
.quiet-cta.ghost:hover { color: var(--lime); border-color: var(--lime); background: transparent; box-shadow: none; }

/* —— 文档页 —— */
.doc { border-top: 1px solid var(--hairline); padding-top: clamp(40px, 7vh, 90px); }
.doc.intro-doc { border-top: none; padding-top: clamp(50px, 9vh, 110px); }
.doc-body { color: var(--ink-2); max-width: 44em; margin-bottom: 20px; font-size: 1.02rem; }
.doc-body a { color: var(--lime); }
.doc-body code { color: var(--ink); }
.doc .cmd-line { margin: 8px 0 22px; }
.doc-table {
  width: 100%; border-collapse: collapse; margin: 10px 0 20px;
  font-size: 0.95rem;
}
.doc-table th, .doc-table td {
  text-align: left; padding: 12px 16px;
  border-bottom: 1px solid var(--hairline);
}
.doc-table th { color: var(--ink-3); font-family: var(--mono); font-size: 12px; letter-spacing: 1px; text-transform: uppercase; }
.doc-table td { color: var(--ink-2); }
.doc-table td code { color: var(--ink); }
.doc-table tr:hover td { background: color-mix(in srgb, var(--lime) 4%, transparent); }

/* —— 响应式（移动端收紧） —— */
@media (max-width: 820px) {
  .cap-list li { flex-direction: column; gap: 8px; }
}

/* —— 语言切换按钮 —— */
.mast-meta { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.lang-toggle { display: inline-flex; gap: 4px; border: 1px solid var(--hairline); border-radius: 3px; padding: 3px; }
.lang-toggle button {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.5px;
  color: var(--ink-2); background: transparent; border: none;
  padding: 4px 10px; border-radius: 2px; cursor: pointer;
  transition: color 0.18s, background 0.18s;
}
.lang-toggle button:hover { color: var(--ink); }
.lang-toggle button.is-active { background: var(--lime); color: var(--bg); font-weight: 600; }

/* —— 文档两栏布局（侧边栏 + 内容） —— */
.doc-layout {
  display: grid; grid-template-columns: minmax(200px, 240px) 1fr;
  gap: clamp(28px, 5vw, 64px);
  max-width: 1240px; margin: 0 auto;
  padding: clamp(40px, 7vh, 90px) clamp(24px, 6vw, 80px);
}
.sidenav { position: sticky; top: 120px; align-self: start; display: flex; flex-direction: column; gap: 2px; }
.sidenav-title {
  font-family: var(--mono); font-size: 12px; letter-spacing: 2px;
  text-transform: uppercase; color: var(--ink-3); margin-bottom: 10px;
}
.sidenav a {
  color: var(--ink-2); font-size: 14px; padding: 8px 12px;
  border-left: 2px solid transparent; border-radius: 0 2px 2px 0;
  transition: color 0.18s, border-color 0.18s, background 0.18s;
}
.sidenav a:hover { color: var(--ink); background: var(--bg-hover); border-left-color: var(--hairline-strong); }
.sidenav a.is-active { color: var(--lime); border-left-color: var(--lime); background: color-mix(in srgb, var(--lime) 6%, transparent); }
.doc-main { min-width: 0; }
.doc-main .doc { border-top: 1px solid var(--hairline); padding-top: clamp(32px, 5vh, 60px); padding-bottom: 0; }
.doc-main .doc:first-child { border-top: none; padding-top: 0; }

@media (max-width: 820px) {
  .doc-layout { grid-template-columns: 1fr; }
  .sidenav { position: static; flex-direction: row; flex-wrap: wrap; gap: 8px 14px; margin-bottom: 24px; }
  .sidenav-title { display: none; }
  .sidenav a { border-left: none; padding: 6px 10px; }
}

/* —— 安装框（栏目切换） —— */
.install-box {
  border: 1px solid var(--hairline); border-radius: 3px;
  background: linear-gradient(180deg, var(--bg-2), var(--bg-3));
  overflow: hidden;
}
.install-tabs { display: flex; border-bottom: 1px solid var(--hairline); }
.install-tab {
  flex: 1; padding: 14px 16px;
  background: transparent; border: none;
  border-bottom: 2px solid transparent;
  color: var(--ink-2); font-size: 15px; letter-spacing: 0.3px;
  cursor: pointer; font-family: inherit;
  transition: color 0.18s, border-color 0.18s, background 0.18s;
}
.install-tab:hover { color: var(--ink); background: var(--bg-hover); }
.install-tab.is-active { color: var(--lime); border-bottom-color: var(--lime); }
.install-pane { display: none; padding: 22px 24px; }
.install-pane.is-active { display: block; }
.install-pane .os-switch { margin-bottom: 18px; }
.install-pane .cmd-line { margin-bottom: 6px; }
.install-pane .cmd-desc { color: var(--ink-2); margin-top: 14px; font-size: 0.95rem; }
.android-actions { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 10px; }

@media (max-width: 820px) {
  .install-tab { padding: 13px 10px; font-size: 14px; }
}

/* —— 网关页 —— */
.gateway-intro { min-height: auto; padding-bottom: 40px; }
.skills-form { display: flex; flex-direction: column; gap: 16px; margin: 8px 0 22px; }
.skill-field { display: flex; flex-direction: column; gap: 6px; }
.skill-field > span { font-family: var(--mono); font-size: 12px; letter-spacing: 1px; text-transform: uppercase; color: var(--ink-3); }
.skill-field input, .skill-field textarea {
  width: 100%; padding: 12px 14px; background: var(--bg-2);
  border: 1px solid var(--hairline-strong); border-radius: 3px;
  color: var(--ink); font-size: 14px; font-family: var(--mono);
  outline: none; transition: border-color 0.18s, box-shadow 0.18s;
}
.skill-field input:focus, .skill-field textarea:focus { border-color: var(--lime); box-shadow: 0 0 0 3px var(--lime-glow); }
.skill-field textarea { font-family: var(--sans); resize: vertical; min-height: 120px; }
.generate-btn { align-self: flex-start; margin-top: 4px; }
.gen-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 8px 0 18px; }
.gen-preview {
  background: rgba(0,0,0,0.3); border: 1px solid var(--hairline);
  border-radius: 3px; padding: 16px; overflow: auto; max-height: 420px;
  font-family: var(--mono); font-size: 12px; color: var(--ink-2);
  white-space: pre-wrap; word-break: break-all;
}
.cmd-desc-inline { font-family: var(--sans); color: var(--ink-2); font-size: 0.9em; border: 1px solid var(--hairline); border-radius: 3px; padding: 2px 8px; }
@media (max-width: 820px) {
  .cmd-desc-inline { display: none; }
}