/* GlideShell 官网与教程共用样式。没有外部字体与 CDN：系统字体，国内访问也快。 */
:root {
  --brand-a: #3b82f6;
  --brand-b: #7c3aed;
  --brand: #4f6cf0;
  --grad: linear-gradient(135deg, var(--brand-a), var(--brand-b));
  --bg: #fafafb;
  --bg-soft: #f2f3f7;
  --card: #ffffff;
  --card-border: rgba(15, 23, 42, 0.08);
  --text: #0f172a;
  --text-2: #475569;
  --text-3: #64748b;
  --line: rgba(15, 23, 42, 0.08);
  --code-bg: #f1f5f9;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 30px 80px rgba(30, 41, 99, 0.18);
  --radius: 16px;
  --font: "Segoe UI Variable Text", "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
  --font-display: "Segoe UI Variable Display", "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "Cascadia Code", "Cascadia Mono", Consolas, "SFMono-Regular", Menlo, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0c10;
    --bg-soft: #12141b;
    --card: #161922;
    --card-border: rgba(255, 255, 255, 0.07);
    --text: #f1f5f9;
    --text-2: #a8b2c4;
    --text-3: #8592a8;
    --line: rgba(255, 255, 255, 0.08);
    --code-bg: #1b1f2a;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 30px 80px rgba(0, 0, 0, 0.5);
    --brand: #8aa2ff;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0b0c10;
  --bg-soft: #12141b;
  --card: #161922;
  --card-border: rgba(255, 255, 255, 0.07);
  --text: #f1f5f9;
  --text-2: #a8b2c4;
  --text-3: #8592a8;
  --line: rgba(255, 255, 255, 0.08);
  --code-bg: #1b1f2a;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 8px 24px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 30px 80px rgba(0, 0, 0, 0.5);
  --brand: #8aa2ff;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; border-radius: 6px; }

.wrap { width: min(1120px, 100% - 32px); margin-inline: auto; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; font-size: 17px; color: var(--text); letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
.brand img { width: 28px; height: 28px; }
.nav-links { display: flex; gap: 22px; margin-left: auto; align-items: center; }
.nav-links a { color: var(--text-2); font-size: 15px; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--text); text-decoration: none; }
/* 语言切换：小号描边胶囊，和导航文字区分开 */
.nav-links a.lang-switch { font-size: 13px; padding: 3px 10px; white-space: nowrap; flex-shrink: 0; border: 1px solid var(--line); border-radius: 999px; }
.nav-links a.lang-switch:hover { border-color: var(--text-2); }
.theme-toggle {
  border: 1px solid var(--line); background: var(--card); color: var(--text-2);
  width: 34px; height: 34px; border-radius: 10px; cursor: pointer; display: grid; place-items: center;
}
.theme-toggle:hover { color: var(--text); }
.theme-toggle svg { width: 17px; height: 17px; }
@media (max-width: 720px) {
  .nav-links a.hide-sm { display: none; }
  .nav-links { gap: 14px; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 12px; font-weight: 600; font-size: 16px;
  border: 1px solid transparent; cursor: pointer; transition: transform .15s ease, box-shadow .15s ease, background .15s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 10px 24px rgba(79, 70, 229, 0.3); }
.btn-primary:hover { box-shadow: 0 14px 30px rgba(79, 70, 229, 0.38); }
.btn-ghost { background: var(--card); color: var(--text); border-color: var(--line); }
.btn svg { width: 18px; height: 18px; }

/* ---------- 首屏 ---------- */
.hero { position: relative; padding: 72px 0 40px; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -40% -10% auto; height: 760px; z-index: -1;
  background: radial-gradient(closest-side, rgba(99, 102, 241, 0.18), transparent 70%),
              radial-gradient(closest-side at 70% 40%, rgba(59, 130, 246, 0.14), transparent 70%);
  filter: blur(10px);
}
.hero-text { text-align: center; max-width: 820px; margin: 0 auto; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px; padding: 5px 12px; border-radius: 999px;
  background: var(--card); border: 1px solid var(--line); color: var(--text-2); font-size: 13.5px; box-shadow: var(--shadow);
}
.eyebrow b { color: var(--brand); font-weight: 650; }
h1 {
  font-family: var(--font-display); font-size: clamp(38px, 6.4vw, 68px); line-height: 1.12; letter-spacing: -0.03em;
  margin: 22px 0 18px; font-weight: 750;
}
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: clamp(17px, 2vw, 20px); color: var(--text-2); margin: 0 auto 30px; max-width: 680px; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.meta { margin-top: 18px; color: var(--text-3); font-size: 14px; }
.meta span + span::before { content: "·"; margin: 0 8px; }

/* ---------- 跟手演示 ---------- */
.demo { margin: 56px auto 0; max-width: 980px; }
.screen {
  position: relative; aspect-ratio: 16 / 10; border-radius: 18px; overflow: hidden; touch-action: none; user-select: none;
  cursor: grab; box-shadow: var(--shadow-lg); border: 1px solid var(--card-border);
  background: linear-gradient(160deg, #a5b4fc 0%, #c4b5fd 35%, #f0abfc 70%, #fda4af 100%);
}
.screen.dragging { cursor: grabbing; }
.screen .wallpaper {
  position: absolute; inset: 0;
  background:
    radial-gradient(60% 50% at 20% 25%, rgba(255,255,255,.45), transparent 60%),
    radial-gradient(50% 60% at 85% 80%, rgba(76, 29, 149, .35), transparent 60%),
    linear-gradient(160deg, #93c5fd 0%, #a5b4fc 40%, #c4b5fd 70%, #f9a8d4 100%);
}
.screen .dim { position: absolute; inset: 0; background: #0b1020; opacity: 0; pointer-events: none; }
.screen .taskbar {
  position: absolute; left: 0; right: 0; bottom: 0; height: 6.2%;
  background: rgba(248, 250, 252, .78); backdrop-filter: blur(10px); display: flex; justify-content: center; align-items: center; gap: 1.2%;
}
.taskbar i { width: 2.2%; aspect-ratio: 1; border-radius: 22%; background: rgba(30, 41, 59, .22); }
.taskbar i:nth-child(3) { background: var(--grad); }
.win {
  position: absolute; left: 0; top: 0; border-radius: 1.1% / 1.8%; background: #fff; overflow: hidden;
  box-shadow: 0 8px 26px rgba(15, 23, 42, .28), 0 0 0 1px rgba(15, 23, 42, .06);
  transform-origin: 0 0; will-change: transform;
}
.win .bar { height: 7%; min-height: 8px; display: flex; align-items: center; gap: 3%; padding: 0 3%; background: #f1f5f9; }
.win .bar b { width: 3%; aspect-ratio: 1; border-radius: 50%; background: #cbd5e1; }
.win .body { position: absolute; inset: 7% 0 0 0; padding: 4%; display: grid; gap: 4%; }
.win .body i { display: block; border-radius: 4px; background: #e2e8f0; }
.win.code { background: #1e1e2e; }
.win.code .bar { background: #181825; }
.win.code .body i { background: #313244; }
.win.code .body i:nth-child(odd) { background: #89b4fa55; }
.label {
  position: absolute; display: flex; align-items: center; gap: 6px; white-space: nowrap;
  color: #fff; font-size: clamp(9px, 1.25vw, 13px); font-weight: 500; text-shadow: 0 1px 3px rgba(0,0,0,.5);
  opacity: 0; transform: translateX(-50%); pointer-events: none;
}
.label i { width: 1.25em; height: 1.25em; border-radius: 28%; display: inline-block; }
.spaces {
  position: absolute; top: 2.2%; left: 50%; transform: translateX(-50%); display: flex; gap: 2.6%; width: 60%; justify-content: center;
  opacity: 0; pointer-events: none;
}
.spaces span {
  font-size: clamp(9px, 1.15vw, 12px); color: #fff; padding: .35em 1.6em; border-radius: 999px; white-space: nowrap;
  text-shadow: 0 1px 2px rgba(0,0,0,.35);
}
.spaces span.on { background: rgba(255,255,255,.18); box-shadow: inset 0 0 0 1px rgba(255,255,255,.22); backdrop-filter: blur(6px); }
.hint {
  position: absolute; left: 50%; bottom: 10%; transform: translateX(-50%);
  display: flex; align-items: center; gap: 10px; padding: 9px 16px; border-radius: 999px;
  background: rgba(15, 23, 42, .62); color: #fff; font-size: 14px; backdrop-filter: blur(8px);
  transition: opacity .4s; pointer-events: none;
}
.hint .fingers { display: flex; gap: 4px; }
.hint .fingers i { width: 7px; height: 7px; border-radius: 50%; background: #fff; animation: swipe 1.6s ease-in-out infinite; }
.hint .fingers i:nth-child(2) { animation-delay: .06s; }
.hint .fingers i:nth-child(3) { animation-delay: .12s; }
@keyframes swipe { 0%, 100% { transform: translateY(4px); opacity: .5; } 50% { transform: translateY(-5px); opacity: 1; } }
.demo-caption { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-top: 16px; color: var(--text-3); font-size: 14px; flex-wrap: wrap; }
.meter { display: flex; align-items: center; gap: 10px; }
.meter .track { width: 160px; height: 6px; border-radius: 3px; background: var(--line); overflow: hidden; }
.meter .fill { height: 100%; width: 0; background: var(--grad); }
.meter code { font-family: var(--mono); color: var(--text-2); min-width: 3.5em; }

/* ---------- 版块 ---------- */
section { padding: 88px 0; }
section.alt { background: var(--bg-soft); border-block: 1px solid var(--line); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.section-head .kicker { color: var(--brand); font-weight: 650; font-size: 14px; letter-spacing: .08em; text-transform: uppercase; }
h2 { font-family: var(--font-display); font-size: clamp(28px, 4vw, 42px); line-height: 1.2; letter-spacing: -0.02em; margin: 10px 0 14px; font-weight: 720; }
.section-head p { color: var(--text-2); font-size: 17.5px; margin: 0; }

/* 对比：原生 vs 跟手 */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.compare .card { padding: 28px; }
.compare h3 { margin: 0 0 6px; font-size: 19px; }
.compare p { margin: 0 0 18px; color: var(--text-2); font-size: 15px; }
.lane { position: relative; height: 54px; border-radius: 12px; background: var(--bg-soft); border: 1px solid var(--line); overflow: hidden; }
.lane .finger, .lane .pane { position: absolute; top: 50%; transform: translate(-50%, -50%); }
.lane .finger { width: 14px; height: 14px; border-radius: 50%; background: var(--text-3); opacity: .55; }
.lane .pane { width: 46px; height: 30px; border-radius: 7px; background: var(--grad); box-shadow: 0 6px 16px rgba(79,70,229,.3); }
.lane-label { display: flex; justify-content: space-between; margin-top: 8px; font-size: 13px; color: var(--text-3); }
@media (max-width: 820px) { .compare { grid-template-columns: 1fr; } }

/* 卡片网格 */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 960px) { .grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid { grid-template-columns: 1fr; } }
.card { background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius); box-shadow: var(--shadow); }
.feature { padding: 26px; transition: transform .2s ease, box-shadow .2s ease; }
.feature:hover { transform: translateY(-3px); box-shadow: 0 14px 34px rgba(15, 23, 42, .1); }
.feature .ico {
  width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 16px;
  background: color-mix(in srgb, var(--brand) 12%, transparent); color: var(--brand);
}
.feature .ico svg { width: 22px; height: 22px; }
.feature h3 { margin: 0 0 6px; font-size: 18px; letter-spacing: -0.01em; }
.feature p { margin: 0; color: var(--text-2); font-size: 15px; }
.tag { display: inline-block; margin-left: 6px; padding: 1px 8px; border-radius: 999px; font-size: 12px; vertical-align: 2px; background: color-mix(in srgb, var(--brand) 14%, transparent); color: var(--brand); font-weight: 600; }

/* 手势速查 */
.gestures { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
@media (max-width: 960px) { .gestures { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .gestures { grid-template-columns: 1fr; } }
.gesture-card { padding: 22px; }
.gesture-card h3 { margin: 14px 0 4px; font-size: 17px; }
.gesture-card p { margin: 0; color: var(--text-2); font-size: 14.5px; }
.pad { width: 100%; aspect-ratio: 1.55; border-radius: 14px; background: var(--bg-soft); border: 1px solid var(--line); color: var(--brand); }
.pad svg { width: 100%; height: 100%; }

/* 数据 */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
@media (max-width: 860px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat { padding: 26px 22px; text-align: center; }
.stat b { display: block; font-family: var(--font-display); font-size: 34px; letter-spacing: -0.02em; line-height: 1.1; }
.stat span { color: var(--text-2); font-size: 14.5px; }
.footnote { text-align: center; color: var(--text-3); font-size: 13.5px; margin-top: 18px; }

/* 下载 */
.download { display: grid; grid-template-columns: 1.1fr 1fr; gap: 28px; align-items: stretch; }
@media (max-width: 860px) { .download { grid-template-columns: 1fr; } }
.download .card { padding: 32px; }
.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; }
.steps li { counter-increment: s; position: relative; padding-left: 46px; margin: 0 0 18px; }
.steps li::before {
  content: counter(s); position: absolute; left: 0; top: 0; width: 30px; height: 30px; border-radius: 50%;
  display: grid; place-items: center; background: var(--grad); color: #fff; font-weight: 700; font-size: 14px;
}
.steps li b { display: block; }
.steps li span { color: var(--text-2); font-size: 15px; }
.req { list-style: none; padding: 0; margin: 0 0 22px; }
.req li { padding: 10px 0; border-bottom: 1px solid var(--line); display: flex; gap: 12px; color: var(--text-2); font-size: 15px; }
.req li svg { width: 20px; height: 20px; flex: none; color: #16a34a; margin-top: 3px; }

/* 常见问题 */
.faq { max-width: 820px; margin: 0 auto; }
details { border-bottom: 1px solid var(--line); padding: 4px 0; }
summary { cursor: pointer; list-style: none; padding: 16px 30px 16px 0; font-weight: 600; font-size: 17px; position: relative; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; position: absolute; right: 4px; top: 12px; font-size: 22px; color: var(--text-3); transition: transform .2s; }
details[open] summary::after { transform: rotate(45deg); }
details p { margin: 0 0 18px; color: var(--text-2); }

/* 页脚 */
footer { padding: 40px 0 56px; border-top: 1px solid var(--line); color: var(--text-3); font-size: 14px; }
footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
footer a { color: var(--text-2); }

/* 进场动画（尊重「减少动态效果」） */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hint .fingers i { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 教程页 ---------- */
.doc { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 48px; padding: 40px 0 80px; }
@media (max-width: 900px) { .doc { grid-template-columns: minmax(0, 1fr); gap: 0; padding-top: 24px; } .toc { display: none; } }
.toc { position: sticky; top: 84px; align-self: start; max-height: calc(100vh - 100px); overflow: auto; font-size: 14.5px; }
.toc p { font-weight: 650; margin: 0 0 8px; color: var(--text); }
.toc ol { list-style: none; padding: 0; margin: 0; }
.toc a { display: block; padding: 5px 10px; border-radius: 8px; color: var(--text-2); border-left: 2px solid transparent; }
.toc a:hover { text-decoration: none; color: var(--text); background: var(--bg-soft); }
.toc a.active { color: var(--brand); background: color-mix(in srgb, var(--brand) 9%, transparent); }
.article { max-width: 780px; }
.article h1 { font-size: clamp(32px, 5vw, 46px); margin: 8px 0 12px; text-align: left; }
.article .lead { margin: 0 0 32px; max-width: none; }
.article h2 { font-size: 27px; margin: 56px 0 14px; padding-top: 12px; scroll-margin-top: 76px; }
.article h3 { font-size: 19px; margin: 30px 0 8px; scroll-margin-top: 76px; }
.article p, .article li { color: var(--text-2); }
.article strong { color: var(--text); }
.article ul, .article ol { padding-left: 22px; }
.article li { margin: 6px 0; }
.article code, .kbd {
  font-family: var(--mono); font-size: .88em; padding: .12em .42em; border-radius: 6px; background: var(--code-bg); color: var(--text);
}
.kbd { border: 1px solid var(--line); border-bottom-width: 2px; font-family: var(--font); font-size: .85em; }
pre { background: var(--code-bg); border: 1px solid var(--line); padding: 14px 16px; border-radius: 12px; overflow: auto; font-size: 14px; line-height: 1.6; }
pre code { padding: 0; background: none; }
.article table { width: 100%; border-collapse: collapse; margin: 14px 0 6px; font-size: 15px; }
.article th, .article td { text-align: left; padding: 11px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.article th { color: var(--text); font-weight: 650; background: var(--bg-soft); }
.article td { color: var(--text-2); }
.article p code, .article li code { overflow-wrap: anywhere; }
@media (max-width: 620px) { .article table { display: block; overflow-x: auto; font-size: 14px; } .article th, .article td { padding: 9px 10px; min-width: 88px; } }
.callout { display: flex; gap: 12px; padding: 14px 16px; border-radius: 12px; margin: 18px 0; border: 1px solid var(--line); background: var(--card); font-size: 15px; }
.callout svg { width: 20px; height: 20px; flex: none; margin-top: 3px; }
.callout.tip svg { color: var(--brand); }
.callout.warn { border-color: color-mix(in srgb, #d97706 35%, transparent); background: color-mix(in srgb, #f59e0b 8%, var(--card)); }
.callout.warn svg { color: #d97706; }
.callout p { margin: 0; }
.figure-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 18px 0; }
@media (max-width: 560px) { .figure-row { grid-template-columns: 1fr; } }
.figure-row .card { padding: 16px; display: flex; gap: 14px; align-items: center; }
.figure-row .pad { width: 120px; flex: none; color: var(--brand); }
.figure-row b { display: block; color: var(--text); }
.figure-row span { color: var(--text-2); font-size: 14.5px; }
.next { display: flex; justify-content: space-between; margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line); }