/* ============================================================
   润色条 PolishBar 官网
   跟随系统浅色 / 深色；品牌色取自 design/AppIcon.svg（#7A6BF5 → #5638D8）
   ============================================================ */

:root {
  --bg: #FBFBFD;
  --bg-2: #F3F2F8;
  --card: #FFFFFF;
  --ink: #16151C;
  --ink-2: #56556A;
  --ink-3: #8E8DA0;
  --line: rgba(22, 18, 60, .09);
  --line-2: rgba(22, 18, 60, .14);
  --brand: #6450F0;
  --brand-ink: #4C36D6;
  --brand-soft: rgba(100, 80, 240, .10);
  --grad: linear-gradient(135deg, #8F7DFF 0%, #6450F0 45%, #4A2FD0 100%);
  --ok: #1E9E4A;
  --shadow-card: 0 1px 2px rgba(20, 16, 60, .04), 0 8px 28px -12px rgba(20, 16, 60, .14);
  --shadow-lift: 0 2px 6px rgba(20, 16, 60, .06), 0 30px 80px -24px rgba(60, 40, 160, .35);
  --aurora-1: rgba(122, 107, 245, .45);
  --aurora-2: rgba(255, 150, 190, .35);
  --aurora-3: rgba(90, 170, 255, .35);

  /* 演示里的 macOS 界面 */
  --m-wall: radial-gradient(120% 90% at 0% 0%, #CFC7FF 0%, transparent 55%),
            radial-gradient(90% 90% at 100% 100%, #FFD9E4 0%, transparent 55%),
            radial-gradient(80% 80% at 100% 0%, #C6E2FF 0%, transparent 60%), #E9E7F5;
  --m-win: rgba(255, 255, 255, .92);
  --m-side: rgba(244, 243, 248, .86);
  --m-text: rgba(0, 0, 0, .86);
  --m-text-2: rgba(0, 0, 0, .50);
  --m-text-3: rgba(0, 0, 0, .28);
  --m-sep: rgba(0, 0, 0, .08);
  --m-fill: rgba(0, 0, 0, .045);
  --m-fill-2: rgba(0, 0, 0, .08);
  --m-bubble: #F0F0F4;
  --m-mat: rgba(250, 250, 252, .78);
  --m-accent: #007AFF;
  --m-accent-soft: rgba(0, 122, 255, .14);
  --m-ins: rgba(40, 180, 70, .20);
  --m-del: #E5372E;
  --m-shadow: 0 0 0 .5px rgba(0, 0, 0, .14), 0 24px 60px -14px rgba(30, 20, 80, .35), 0 4px 14px rgba(30, 20, 80, .10);

  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  --radius: 22px;
  color-scheme: light dark;
}

/* 各语言字体：中日韩的汉字字形不同，按语言选字体 */
html:lang(zh-Hant) {
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang TC", "Microsoft JhengHei", sans-serif;
}
html:lang(ja) {
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
}
html:lang(ko) {
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
}
html:lang(ar) {
  --font: -apple-system, BlinkMacSystemFont, "SF Arabic", "Geeza Pro", "Noto Sans Arabic", "Segoe UI", Tahoma, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "SF Arabic", "Geeza Pro", "Noto Sans Arabic", "Segoe UI", Tahoma, sans-serif;
}
/* 阿拉伯文是连写体，字距不能收紧；行高也要更松 */
html:lang(ar) h1, html:lang(ar) h2, html:lang(ar) h3, html:lang(ar) .eyebrow, html:lang(ar) .sc-lbl { letter-spacing: 0 !important; }
html:lang(ar) .hero h1 { line-height: 1.3; }
html:lang(ar) .section h2, html:lang(ar) .privacy h2, html:lang(ar) .final h2 { line-height: 1.35; }
html:lang(ar) body { line-height: 1.8; }

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0A0A0F;
    --bg-2: #101017;
    --card: #14141C;
    --ink: #F3F2FA;
    --ink-2: #A9A7BD;
    --ink-3: #6F6D85;
    --line: rgba(255, 255, 255, .08);
    --line-2: rgba(255, 255, 255, .14);
    --brand: #9A8BFF;
    --brand-ink: #B4A8FF;
    --brand-soft: rgba(154, 139, 255, .14);
    --ok: #3FD46E;
    --shadow-card: 0 0 0 1px rgba(255, 255, 255, .02), 0 12px 40px -16px rgba(0, 0, 0, .8);
    --shadow-lift: 0 0 0 1px rgba(255, 255, 255, .04), 0 40px 100px -30px rgba(80, 60, 220, .45);
    --aurora-1: rgba(110, 90, 255, .40);
    --aurora-2: rgba(220, 80, 160, .22);
    --aurora-3: rgba(40, 120, 255, .25);

    --m-wall: radial-gradient(120% 90% at 0% 0%, #3B2F8A 0%, transparent 55%),
              radial-gradient(90% 90% at 100% 100%, #5A2447 0%, transparent 55%),
              radial-gradient(80% 80% at 100% 0%, #173A66 0%, transparent 60%), #14131F;
    --m-win: rgba(30, 30, 34, .92);
    --m-side: rgba(40, 40, 46, .80);
    --m-text: rgba(255, 255, 255, .90);
    --m-text-2: rgba(255, 255, 255, .55);
    --m-text-3: rgba(255, 255, 255, .28);
    --m-sep: rgba(255, 255, 255, .08);
    --m-fill: rgba(255, 255, 255, .06);
    --m-fill-2: rgba(255, 255, 255, .11);
    --m-bubble: #2C2C31;
    --m-mat: rgba(46, 46, 52, .78);
    --m-accent: #0A84FF;
    --m-accent-soft: rgba(10, 132, 255, .28);
    --m-ins: rgba(50, 215, 75, .25);
    --m-del: #FF6A60;
    --m-shadow: 0 0 0 .5px rgba(0, 0, 0, .6), inset 0 0 0 .5px rgba(255, 255, 255, .10), 0 24px 60px -14px rgba(0, 0, 0, .7), 0 4px 14px rgba(0, 0, 0, .3);
  }
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 var(--font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg { display: block; }
a { color: inherit; }
h1, h2, h3 { margin: 0; font-family: var(--font-display); text-wrap: balance; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; border-radius: 6px; }
.wrap { width: min(1120px, 100% - 48px); margin-inline: auto; }

kbd {
  display: inline-grid; place-items: center;
  min-width: 1.7em; height: 1.7em; padding: 0 .4em; margin: 0 .12em;
  font: 600 .82em/1 var(--font);
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line-2);
  border-bottom-width: 2px;
  border-radius: 6px;
  vertical-align: .08em;
}

.ico { width: 18px; height: 18px; flex: none; }
.ico-s { width: 14px; height: 14px; flex: none; }
.ico-xs { width: 11px; height: 11px; flex: none; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  white-space: nowrap;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:active { transform: scale(.97); }
.btn-sm { padding: 6px 14px; font-size: 14px; }
.btn-sm .ico { width: 15px; height: 15px; }
.btn-lg { padding: 14px 26px; font-size: 17px; }
.btn-primary {
  color: #fff;
  background: var(--grad);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .25) inset, 0 8px 24px -8px rgba(86, 56, 216, .65);
}
.btn-primary:hover { box-shadow: 0 1px 0 rgba(255, 255, 255, .25) inset, 0 12px 32px -8px rgba(86, 56, 216, .8); transform: translateY(-1px); }
.btn-ghost { color: var(--ink); background: var(--brand-soft); }
.btn-ghost:hover { background: color-mix(in srgb, var(--brand) 18%, transparent); }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  backdrop-filter: saturate(1.8) blur(20px);
  -webkit-backdrop-filter: saturate(1.8) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease;
}
.nav.scrolled { border-bottom-color: var(--line); }
.nav-in { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: flex; align-items: center; gap: 8px; text-decoration: none; font-weight: 700; font-size: 17px; }
.brand small { font-weight: 500; font-size: 13px; color: var(--ink-3); }
.nav-links { display: flex; gap: 4px; margin-inline-start: auto; }
.nav-links a { padding: 6px 12px; border-radius: 8px; text-decoration: none; font-size: 14px; color: var(--ink-2); transition: color .2s, background .2s; }
.nav-links a:hover { color: var(--ink); background: var(--brand-soft); }

/* 语言菜单 */
.lang { position: relative; }
.lang summary {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 10px; border-radius: 8px;
  font-size: 14px; color: var(--ink-2);
  list-style: none; cursor: pointer; user-select: none;
  transition: color .2s, background .2s;
}
.lang summary::-webkit-details-marker { display: none; }
.lang summary:hover, .lang[open] summary { color: var(--ink); background: var(--brand-soft); }
.lang summary .ico { width: 16px; height: 16px; }
.lang-list {
  position: absolute; top: calc(100% + 8px); inset-inline-end: 0; z-index: 60;
  min-width: 168px; margin: 0; padding: 6px; list-style: none;
  background: color-mix(in srgb, var(--card) 94%, transparent);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--line); border-radius: 14px;
  box-shadow: var(--shadow-lift);
  animation: pop .18s ease-out;
}
.lang-list a { display: block; padding: 7px 12px; border-radius: 8px; text-decoration: none; font-size: 14px; }
.lang-list a:hover { background: var(--brand-soft); }
.lang-list a[aria-current] { color: var(--brand-ink); font-weight: 600; }

/* ---------- 极光背景 ---------- */
.aurora { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 0; }
.aurora i {
  position: absolute; border-radius: 50%;
  filter: blur(80px);
  animation: drift 18s ease-in-out infinite alternate;
}
.aurora i:nth-child(1) { width: 640px; height: 520px; left: 50%; top: -220px; margin-left: -520px; background: var(--aurora-1); }
.aurora i:nth-child(2) { width: 520px; height: 420px; left: 50%; top: -120px; margin-left: 40px; background: var(--aurora-2); animation-delay: -6s; }
.aurora i:nth-child(3) { width: 560px; height: 460px; left: 50%; top: 260px; margin-left: -200px; background: var(--aurora-3); animation-delay: -12s; opacity: .7; }
@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(60px, 40px, 0) scale(1.12); }
}

/* ---------- 首屏 ---------- */
.hero { position: relative; padding: 72px 0 40px; isolation: isolate; }
.hero::after {
  content: ""; position: absolute; inset: auto 0 0; height: 240px; z-index: 0;
  background: linear-gradient(to bottom, transparent, var(--bg));
  pointer-events: none;
}
.hero-in { position: relative; z-index: 1; text-align: center; display: flex; flex-direction: column; align-items: center; }
.hero-icon {
  width: 96px; height: 96px;
  filter: drop-shadow(0 16px 30px rgba(86, 56, 216, .45));
  animation: float 6s ease-in-out infinite;
}
@keyframes float { 50% { transform: translateY(-6px); } }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 26px; padding: 5px 14px;
  font-size: 13px; color: var(--ink-2);
  background: color-mix(in srgb, var(--card) 70%, transparent);
  border: 1px solid var(--line);
  border-radius: 999px;
  backdrop-filter: blur(10px);
}
.badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 22%, transparent); }
.hero h1 {
  margin-top: 20px;
  font-size: clamp(44px, 8vw, 84px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -.035em;
}
.lede { margin-top: 22px; max-width: 34em; font-size: clamp(17px, 2vw, 20px); color: var(--ink-2); }
.lede kbd { font-size: .78em; }
.cta { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 34px; }
.meta { margin-top: 16px; font-size: 13px; color: var(--ink-3); }

/* ---------- 演示舞台 ---------- */
.demo-wrap { position: relative; z-index: 1; margin-top: 64px; }
.stage {
  position: relative;
  aspect-ratio: 16 / 9.4;
  padding: 5.5% 7% 0;
  border-radius: 28px;
  background: var(--m-wall);
  box-shadow: var(--shadow-lift);
  overflow: hidden;
  font: 13px/1.45 var(--font);
  color: var(--m-text);
  outline-offset: 6px;
  border-radius: 28px;
}
.stage::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .25);
  z-index: 3;
}

.win {
  position: relative; display: flex; height: 100%;
  border-radius: 12px 12px 0 0;
  background: var(--m-win);
  box-shadow: var(--m-shadow);
  overflow: visible;
}
.lights { display: flex; gap: 8px; }
.lights i { width: 12px; height: 12px; border-radius: 50%; background: #FF5F57; box-shadow: inset 0 0 0 .5px rgba(0, 0, 0, .12); }
.lights i:nth-child(2) { background: #FEBC2E; }
.lights i:nth-child(3) { background: #28C840; }

.win-side {
  flex: 0 0 31%;
  padding: 16px 10px;
  background: var(--m-side);
  border-inline-end: 1px solid var(--m-sep);
  border-start-start-radius: 12px;
}
.win-side .lights { padding: 0 6px 16px; }
.search { margin: 0 4px 10px; padding: 4px 10px; border-radius: 7px; background: var(--m-fill-2); color: var(--m-text-3); font-size: 12px; }
.chats { list-style: none; margin: 0; padding: 0; }
.chats li { display: flex; align-items: center; gap: 10px; padding: 8px; border-radius: 9px; }
.chats li.on { background: var(--m-accent-soft); }
.chats li div { min-width: 0; }
.chats b { display: block; font-size: 13px; font-weight: 600; }
.chats small { display: block; font-size: 11.5px; color: var(--m-text-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.av {
  flex: none; display: grid; place-items: center;
  width: 32px; height: 32px; border-radius: 9px;
  background: var(--c); color: #fff;
  font-size: 13px; font-weight: 600;
}

.win-main { position: relative; flex: 1; display: flex; flex-direction: column; min-width: 0; }
.win-title { display: flex; align-items: baseline; gap: 8px; padding: 14px 20px; border-bottom: 1px solid var(--m-sep); }
.win-title b { font-size: 14px; }
.win-title span { font-size: 12px; color: var(--m-text-2); }
.msgs { flex: 1; padding: 18px 20px; display: flex; flex-direction: column; gap: 14px; }
.msg { display: flex; gap: 10px; align-items: flex-start; }
.msg small { display: block; font-size: 11.5px; color: var(--m-text-2); margin-bottom: 3px; }
.msg p { padding: 8px 12px; border-radius: 12px; border-start-start-radius: 4px; background: var(--m-bubble); max-width: 34em; }
.msg em { font-style: normal; color: var(--m-accent); }

.composer { margin: 0 16px 16px; padding: 12px 14px 10px; border: 1px solid var(--m-sep); border-radius: 12px; background: var(--m-win); }
.composer-box { min-height: 44px; font-size: 14px; white-space: pre-wrap; word-break: break-word; }
.composer-hint { display: block; text-align: end; font-size: 11px; color: var(--m-text-3); }
.caret {
  display: inline-block; width: 1.5px; height: 1.15em; margin-inline-start: 1px;
  vertical-align: -.2em; background: var(--m-accent);
  animation: blink 1.05s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
#demoInput.selected { background: color-mix(in srgb, var(--m-accent) 26%, transparent); border-radius: 2px; }

/* 预览浮窗：与客户端 PreviewPanel 一致的三段结构 */
.pb {
  position: absolute; inset-inline-end: 18px; bottom: 108px; z-index: 4;
  width: min(420px, calc(100% - 36px));
  border-radius: 14px;
  background: var(--m-mat);
  backdrop-filter: saturate(1.8) blur(28px);
  -webkit-backdrop-filter: saturate(1.8) blur(28px);
  box-shadow: var(--m-shadow);
  transform-origin: 70% 100%;
  animation: pop .26s cubic-bezier(.2, .9, .3, 1.2);
}
.pb[hidden] { display: none; }
.pb.closing { animation: unpop .18s ease-in forwards; }
@keyframes pop { from { opacity: 0; transform: translateY(8px) scale(.96); } }
@keyframes unpop { to { opacity: 0; transform: translateY(6px) scale(.97); } }
.pb-top { display: flex; align-items: center; gap: 8px; padding: 10px 12px 0; }
.pb-style {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 8px 3px 6px; border-radius: 7px;
  font-weight: 600; font-size: 12.5px;
  background: var(--m-fill);
}
.pb-style .ico-s { color: var(--m-accent); }
.pb-style .ico-xs { color: var(--m-text-2); }
.pb-style.flash { animation: flash .5s ease; }
@keyframes flash { 40% { background: var(--m-accent-soft); } }
.pb-status { font-size: 11.5px; color: var(--m-text-2); }
.pb-body { position: relative; padding: 10px 14px 12px; min-height: 66px; }
.pb-text { font-size: 14px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; }
.pb-text .tail::after { content: "▍"; color: var(--m-accent); margin-inline-start: 1px; }
.pb-text del { color: var(--m-del); text-decoration-thickness: 1.5px; opacity: .85; }
.pb-text ins { text-decoration: none; background: var(--m-ins); border-radius: 3px; }
.pb-skel { display: none; flex-direction: column; gap: 8px; padding-top: 4px; }
.pb.loading .pb-skel { display: flex; }
.pb.loading .pb-text { display: none; }
.pb-skel i {
  height: 10px; border-radius: 5px;
  background: linear-gradient(90deg, var(--m-fill) 0%, var(--m-fill-2) 50%, var(--m-fill) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.2s linear infinite;
}
.pb-skel i:nth-child(2) { width: 86%; }
.pb-skel i:nth-child(3) { width: 58%; }
@keyframes shimmer { to { background-position: -200% 0; } }
.pb-hints {
  display: flex; align-items: center; gap: 2px;
  padding: 6px 8px; border-top: 1px solid var(--m-sep);
}
.pb-hints .grow { flex: 1; }
.hint {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 7px; border: 0; border-radius: 6px;
  background: none; color: var(--m-text-2);
  font: 12px var(--font);
  white-space: nowrap;
  cursor: pointer;
  transition: background .15s, color .15s, opacity .2s;
}
.hint:hover { background: var(--m-fill); color: var(--m-text); }
.hint kbd {
  min-width: 0; height: auto; margin: 0; padding: 0 4px;
  border: 0; border-radius: 4px;
  background: var(--m-fill-2); color: inherit;
  font: 500 11px/17px var(--font);
}
.hint.primary { color: var(--m-accent); font-weight: 600; }
.hint.primary kbd { background: var(--m-accent); color: #fff; }
.pb:not(.done) .hint:not([data-act="cancel"]) { opacity: .35; pointer-events: none; }
.hint.down { background: var(--m-fill-2); color: var(--m-text); }

/* 按键回显，类似录屏工具的按键显示 */
.keycast {
  position: absolute; left: 50%; top: 18px; z-index: 5;
  display: flex; gap: 6px;
  transform: translateX(-50%);
  pointer-events: none;
}
.keycast kbd {
  min-width: 40px; height: 40px; padding: 0 12px; margin: 0;
  font-size: 18px; font-weight: 600;
  color: #fff;
  background: rgba(20, 18, 32, .72);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 10px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .25);
  animation: keyin .18s ease-out;
}
.keycast.out kbd { animation: keyout .25s ease-in forwards; }
@keyframes keyin { from { opacity: 0; transform: translateY(-6px) scale(.9); } }
@keyframes keyout { to { opacity: 0; transform: translateY(-4px); } }

.toast {
  position: absolute; left: 50%; bottom: 22px; z-index: 5;
  padding: 7px 14px; border-radius: 999px;
  font-size: 12.5px; color: var(--m-text);
  background: var(--m-mat);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--m-shadow);
  transform: translate(-50%, 10px);
  opacity: 0;
  transition: opacity .25s, transform .25s;
  pointer-events: none;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.demo-ctrl { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 10px 12px; margin-top: 22px; }
.demo-ctrl .lbl { font-size: 13px; color: var(--ink-3); }
.chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 13px; border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--card); color: var(--ink-2);
  font: 13.5px var(--font);
  cursor: pointer;
  transition: border-color .2s, color .2s, background .2s;
}
.chip:hover { color: var(--ink); border-color: var(--line-2); }
.chip .n { font-size: 11px; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.chip[aria-pressed="true"] { color: var(--brand-ink); border-color: color-mix(in srgb, var(--brand) 45%, transparent); background: var(--brand-soft); }
.chip[aria-pressed="true"] .n { color: var(--brand); }
.chip.replay { color: var(--brand-ink); }

/* ---------- 通用分区 ---------- */
.section { position: relative; padding: 120px 0 0; }
.head { max-width: 640px; margin: 0 auto 56px; text-align: center; }
.eyebrow { font-size: 14px; font-weight: 600; color: var(--brand); letter-spacing: .04em; margin-bottom: 12px; }
.section h2, .privacy h2, .final h2 {
  font-size: clamp(32px, 4.6vw, 52px);
  line-height: 1.15; font-weight: 750;
  letter-spacing: -.028em;
}
.head > p:not(.eyebrow) { margin-top: 16px; font-size: 18px; color: var(--ink-2); }
.br-m { display: none; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s cubic-bezier(.2, .8, .2, 1); }
.reveal.in { opacity: 1; transform: none; }

/* 三步 */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.steps li { padding: 14px 14px 26px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow-card); }
.steps li:nth-child(2) { transition-delay: .08s; }
.steps li:nth-child(3) { transition-delay: .16s; }
.step-visual {
  display: grid; place-items: center;
  height: 150px; margin-bottom: 22px;
  border-radius: 14px;
  background: radial-gradient(120% 120% at 50% 0%, var(--brand-soft), transparent 70%), var(--bg-2);
}
.fake-input { padding: 10px 14px; border-radius: 10px; background: var(--card); border: 1px solid var(--line); font-size: 14px; box-shadow: var(--shadow-card); }
.fake-input .caret { background: var(--brand); }
.keys-big { gap: 10px; display: flex; justify-content: center; align-items: center; }
.keys-big kbd { min-width: 54px; height: 54px; font-size: 22px; border-radius: 12px; border-bottom-width: 4px; box-shadow: var(--shadow-card); }
.keys-big kbd.wide { min-width: 96px; }
.steps h3, .setup h3 { display: flex; align-items: center; gap: 10px; padding: 0 12px; font-size: 20px; font-weight: 650; }
.steps p { padding: 0 12px; margin-top: 8px; color: var(--ink-2); font-size: 15px; }
.num {
  display: inline-grid; place-items: center;
  width: 26px; height: 26px; border-radius: 50%;
  font-size: 13px; font-weight: 700; color: #fff;
  background: var(--grad);
}

/* 风格 */
.styles { max-width: 920px; margin: 0 auto; }
.style-tabs { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; margin-bottom: 22px; }
.style-tab {
  padding: 8px 18px; border-radius: 999px; border: 0;
  background: none; color: var(--ink-2);
  font: 500 15px var(--font);
  cursor: pointer;
  transition: background .2s, color .2s;
}
.style-tab:hover { color: var(--ink); background: var(--brand-soft); }
.style-tab[aria-selected="true"] { color: #fff; background: var(--grad); box-shadow: 0 6px 18px -8px rgba(86, 56, 216, .7); }
.style-card { padding: 26px; border-radius: 26px; background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow-card); }
.sc-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 18px; }
.sc-ctx { font-size: 13px; font-weight: 600; color: var(--brand-ink); background: var(--brand-soft); padding: 4px 12px; border-radius: 999px; }
.switch { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ink-2); cursor: pointer; user-select: none; }
.switch input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.switch .track { position: relative; width: 34px; height: 20px; border-radius: 999px; background: var(--line-2); transition: background .2s; }
.switch .track::after { content: ""; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0, 0, 0, .25); transition: transform .2s; }
.switch input:checked + .track { background: var(--brand); }
.switch input:checked + .track::after { transform: translateX(14px); }
[dir="rtl"] .switch .track::after { left: auto; right: 2px; }
[dir="rtl"] .switch input:checked + .track::after { transform: translateX(-14px); }
.switch input:focus-visible + .track { outline: 2px solid var(--brand); outline-offset: 2px; }
.sc-grid { display: grid; grid-template-columns: 1fr 40px 1fr; align-items: stretch; }
.sc-box { padding: 18px 20px; border-radius: 16px; min-height: 180px; }
.sc-box.before { background: var(--bg-2); color: var(--ink-2); }
.sc-box.after { background: radial-gradient(140% 120% at 100% 0%, var(--brand-soft), transparent 70%), var(--bg-2); box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--brand) 22%, transparent); }
.sc-lbl { display: block; font-size: 12px; font-weight: 600; color: var(--ink-3); margin-bottom: 8px; letter-spacing: .04em; }
.sc-box p { font-size: 16px; line-height: 1.75; white-space: pre-wrap; word-break: break-word; }
.sc-box.after p { color: var(--ink); }
.sc-box p.swap { animation: swap .4s ease; }
@keyframes swap { from { opacity: 0; transform: translateY(6px); } }
.sc-box del { color: #E5372E; opacity: .75; text-decoration-thickness: 1.5px; }
.sc-box ins { text-decoration: none; background: rgba(40, 180, 70, .20); border-radius: 3px; }
.sc-arrow { display: grid; place-items: center; color: var(--ink-3); }
.sc-arrow svg { width: 22px; height: 22px; }
[dir="rtl"] .sc-arrow svg { transform: scaleX(-1); }
.sc-rule { margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--line-2); font-size: 14px; color: var(--ink-2); display: flex; gap: 12px; }
.sc-rule b { flex: none; color: var(--ink); font-weight: 600; }

/* 功能便当格 */
.bento { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; }
.card {
  position: relative; overflow: hidden;
  display: flex; flex-direction: column;
  padding: 28px;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  transition: transform .35s ease, box-shadow .35s ease, opacity .7s ease;
}
.card:hover { transform: translateY(-3px); }
.card h3 { font-size: 20px; font-weight: 650; letter-spacing: -.01em; }
.card p { margin-top: 8px; font-size: 15px; color: var(--ink-2); }
.span-2 { grid-column: span 2; }
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.mini { margin: -4px 0 22px; }

.c-apps { flex-direction: row; gap: 28px; align-items: center; min-height: 260px;
  background: radial-gradient(90% 120% at 100% 50%, var(--brand-soft), transparent 70%), var(--card); }
.c-apps .card-txt { flex: 1 1 46%; }
.app-cloud { flex: 1 1 54%; display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.app-cloud span {
  padding: 8px 14px; border-radius: 12px;
  font-size: 14px; font-weight: 500;
  background: var(--card); border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  animation: bob 5s ease-in-out infinite;
}
.app-cloud span:nth-child(3n) { animation-delay: -1.6s; }
.app-cloud span:nth-child(3n+1) { animation-delay: -3.2s; }
.app-cloud span.more { color: var(--ink-3); }
@keyframes bob { 50% { transform: translateY(-4px); } }

.mini-select { display: flex; flex-direction: column; align-items: flex-start; gap: 10px; }
.ms-box { width: 100%; padding: 12px 14px; border-radius: 10px; background: var(--bg-2); font-size: 14px; }
.ms-sel { background: color-mix(in srgb, #3B82F6 26%, transparent); border-radius: 2px; }
.ms-tag { font-size: 12px; font-weight: 600; color: var(--brand-ink); background: var(--brand-soft); padding: 2px 10px; border-radius: 999px; }

.mini-diff { padding: 12px 14px; border-radius: 10px; background: var(--bg-2); font-size: 14px; line-height: 1.7; min-height: 82px; }
.mini-diff del { color: #E5372E; opacity: .75; }
.mini-diff ins { text-decoration: none; background: rgba(40, 180, 70, .22); border-radius: 3px; }

.mini-safe { display: flex; flex-direction: column; gap: 6px; }
.safe-row { display: flex; align-items: center; gap: 8px; padding: 7px 12px; border-radius: 10px; background: var(--bg-2); font-size: 14px; }
.safe-row .ico-s { color: var(--ok); }

.mini-perapp { display: flex; flex-direction: column; gap: 6px; }
.mini-perapp div { display: flex; align-items: center; gap: 8px; padding: 7px 12px; border-radius: 10px; background: var(--bg-2); font-size: 14px; }
.mini-perapp i { flex: 1; height: 1px; background: repeating-linear-gradient(90deg, var(--line-2) 0 4px, transparent 4px 8px); }
.mini-perapp b { font-weight: 600; color: var(--brand-ink); }

.mini-menu { position: relative; height: 196px; border-radius: 14px; overflow: hidden; background: var(--m-wall); }
.mb-bar { display: flex; align-items: center; justify-content: flex-end; gap: 14px; height: 26px; padding: 0 14px; background: color-mix(in srgb, var(--m-win) 70%, transparent); backdrop-filter: blur(10px); font-size: 12px; color: var(--m-text); }
.mb-bar span:first-child { flex: 1; }
.mb-bar img { width: 16px; height: 16px; padding: 1px; border-radius: 4px; background: var(--m-fill-2); }
.mb-menu {
  position: absolute; top: 30px; inset-inline-end: 70px; width: 210px; padding: 5px;
  border-radius: 10px; background: var(--m-mat);
  backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  box-shadow: var(--m-shadow); color: var(--m-text); font-size: 13px;
}
.mi { display: flex; align-items: center; gap: 6px; padding-block: 4px; padding-inline: 24px 10px; border-radius: 5px; position: relative; }
.mi span { margin-inline-start: auto; color: var(--m-text-2); font-size: 12px; }
.mi.strong { background: var(--m-accent); color: #fff; }
.mi.strong span { color: rgba(255, 255, 255, .8); }
.mi .ck { position: absolute; inset-inline-start: 8px; }
.mi .r { margin-inline-start: auto; transform: rotate(-90deg); color: var(--m-text-2); }
[dir="rtl"] .mi .r { transform: rotate(90deg); }
.sep { height: 1px; margin: 4px 10px; background: var(--m-sep); }

.mini-json {
  margin: -4px 0 22px; padding: 18px 20px; border-radius: 14px;
  background: #14131C; color: #D8D6EA;
  font: 12.5px/1.65 var(--font-mono);
  white-space: pre-wrap; overflow: hidden; min-height: 196px;
}
.mini-json .k { color: #A99CFF; }
.mini-json .s { color: #8FD9A8; }

/* 模型 */
.split { display: grid; grid-template-columns: 1fr 1.05fr; gap: 64px; align-items: center; }
.split-txt > p:not(.eyebrow) { margin-top: 18px; font-size: 18px; color: var(--ink-2); }
.providers { list-style: none; padding: 0; margin: 28px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.providers li { padding: 7px 15px; border-radius: 999px; font-size: 14px; font-weight: 500; background: var(--card); border: 1px solid var(--line); }
.providers li.dim { color: var(--ink-3); border-style: dashed; }
.settings { border-radius: 14px; overflow: hidden; background: var(--m-win); box-shadow: var(--shadow-lift); color: var(--m-text); font-size: 13px; }
.set-title { display: flex; align-items: center; padding: 12px 14px; border-bottom: 1px solid var(--m-sep); background: var(--m-side); }
.set-title b { flex: 1; text-align: center; margin-inline-end: 52px; font-size: 13px; }
.set-body { padding: 20px; display: flex; flex-direction: column; gap: 14px; }
.set-seg { display: flex; padding: 2px; border-radius: 8px; background: var(--m-fill-2); }
.set-seg span { flex: 1; text-align: center; padding: 4px 0; border-radius: 6px; font-size: 12px; color: var(--m-text-2); }
.set-seg span.on { background: var(--m-win); color: var(--m-text); font-weight: 600; box-shadow: 0 1px 3px rgba(0, 0, 0, .12); }
.set-row { display: grid; grid-template-columns: 76px 1fr; align-items: center; gap: 12px; }
.set-row label { text-align: end; color: var(--m-text-2); }
.field { display: flex; align-items: center; padding: 6px 10px; border-radius: 6px; background: var(--m-fill); box-shadow: inset 0 0 0 .5px var(--m-sep); white-space: nowrap; overflow: hidden; }
.field.mono { font-family: var(--font-mono); font-size: 12px; }
.kc { margin-inline-start: auto; padding: 1px 7px; border-radius: 4px; font: 600 10.5px var(--font); color: var(--m-accent); background: var(--m-accent-soft); }
.set-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 4px; padding-top: 14px; border-top: 1px solid var(--m-sep); }
.ok { display: inline-flex; align-items: center; gap: 6px; color: #28B446; font-weight: 500; }
.btn-fake { padding: 4px 14px; border-radius: 6px; background: var(--m-accent); color: #fff; font-weight: 500; }

/* 隐私 */
.privacy {
  position: relative; overflow: hidden;
  padding: 64px;
  border-radius: 32px;
  color: #F3F2FA;
  background:
    radial-gradient(80% 120% at 0% 0%, rgba(122, 107, 245, .55), transparent 60%),
    radial-gradient(60% 100% at 100% 100%, rgba(86, 56, 216, .55), transparent 60%),
    #0F0D1E;
  box-shadow: var(--shadow-lift);
}
.privacy::after {
  content: ""; position: absolute; inset-inline-end: -60px; top: -60px; width: 320px; height: 320px;
  background: url("assets/icon.svg") center / contain no-repeat;
  opacity: .08; transform: rotate(12deg);
}
.privacy-head { position: relative; max-width: 600px; }
.privacy .eyebrow { color: #B9AEFF; }
.privacy-head p:not(.eyebrow) { margin-top: 16px; font-size: 18px; color: rgba(243, 242, 250, .7); }
.privacy-grid { position: relative; list-style: none; margin: 48px 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.privacy-grid li { padding: 20px; border-radius: 18px; background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .08); backdrop-filter: blur(10px); }
.privacy-grid b { display: block; font-size: 16px; margin-bottom: 6px; }
.privacy-grid span { font-size: 14px; color: rgba(243, 242, 250, .66); }

/* 上手 */
.setup { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; position: relative; }
.setup::before { content: ""; position: absolute; left: 16.6%; right: 16.6%; top: 22px; height: 2px; background: linear-gradient(90deg, transparent, var(--line-2) 15%, var(--line-2) 85%, transparent); }
.setup li { position: relative; text-align: center; padding: 0 24px; }
.setup li:nth-child(2) { transition-delay: .08s; }
.setup li:nth-child(3) { transition-delay: .16s; }
.setup .num { width: 46px; height: 46px; font-size: 18px; box-shadow: 0 0 0 8px var(--bg); }
.setup h3 { justify-content: center; margin-top: 22px; }
.setup p { margin-top: 8px; color: var(--ink-2); font-size: 15px; }

/* 常见问题 */
.faq-wrap { max-width: 800px; }
.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 22px 4px;
  font-size: 18px; font-weight: 600;
  cursor: pointer; list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; flex: none; width: 22px; height: 22px; border-radius: 50%;
  background: var(--brand-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 22 22'%3E%3Cpath d='M11 7v8M7 11h8' stroke='%236450F0' stroke-width='1.8' stroke-linecap='round'/%3E%3C/svg%3E") center / 22px no-repeat;
  transition: transform .25s ease;
}
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 4px 24px; color: var(--ink-2); font-size: 16px; max-width: 46em; }

/* 结尾 */
.final { position: relative; margin-top: 140px; padding: 120px 0 130px; overflow: hidden; isolation: isolate; border-top: 1px solid var(--line); }
.aurora.small i:nth-child(1) { top: 40px; margin-left: -460px; }
.aurora.small i:nth-child(2) { top: 120px; margin-left: 0; }
.final-in { position: relative; z-index: 1; display: flex; flex-direction: column; align-items: center; text-align: center; }
.final-in img { filter: drop-shadow(0 16px 30px rgba(86, 56, 216, .45)); }
.final h2 { margin-top: 28px; }
.final p { margin: 14px 0 32px; color: var(--ink-2); }

/* 页脚 */
.footer { border-top: 1px solid var(--line); padding: 28px 0 40px; font-size: 14px; color: var(--ink-3); }
.foot-in { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.foot-in .brand { font-size: 15px; color: var(--ink); }
.foot-in nav { display: flex; gap: 18px; margin-inline-start: auto; }
.foot-in nav a { text-decoration: none; }
.foot-in nav a:hover { color: var(--ink); }
.foot-langs nav { display: flex; flex-wrap: wrap; gap: 6px 18px; margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--line); font-size: 13px; }
.foot-langs a { text-decoration: none; }
.foot-langs a:hover { color: var(--ink); }
.foot-langs a[aria-current] { color: var(--ink); font-weight: 600; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .bento { grid-template-columns: repeat(2, 1fr); }
  .span-2, .span-3 { grid-column: span 1; }
  .span-4 { grid-column: span 2; }
  .privacy-grid { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .stage { aspect-ratio: 4 / 3; padding: 5% 4% 0; }
}

@media (max-width: 900px) {
  .nav-links { display: none; }
  .lang { margin-inline-start: auto; }
  .nav-in { gap: 12px; }
}

@media (max-width: 720px) {
  .wrap { width: min(1120px, 100% - 32px); }
  .lang-cur { display: none; }
  .hero { padding-top: 48px; }
  .br-m { display: inline; }
  .section { padding-top: 88px; }
  .head { margin-bottom: 36px; }
  .stage { aspect-ratio: auto; height: 520px; padding: 56px 10px 0; border-radius: 20px; }
  .win-side { display: none; }
  .msg p { max-width: none; }
  .pb { inset-inline-end: 10px; width: calc(100% - 20px); }
  .hint[data-act="copy"], .hint[data-act="regen"] { display: none; }
  .keycast { top: 10px; }
  .steps, .setup { grid-template-columns: 1fr; gap: 16px; }
  .setup { gap: 36px; }
  .setup::before { display: none; }
  .bento { grid-template-columns: 1fr; }
  .span-2, .span-3, .span-4 { grid-column: auto; }
  .c-apps { flex-direction: column; align-items: stretch; }
  .sc-grid { grid-template-columns: 1fr; gap: 0; }
  .sc-arrow { height: 36px; transform: rotate(90deg); }
  [dir="rtl"] .sc-arrow { transform: rotate(-90deg); }
  .sc-box { min-height: 0; }
  .style-card { padding: 18px; }
  .sc-rule { flex-direction: column; gap: 4px; }
  .privacy { padding: 36px 24px; border-radius: 24px; }
  .privacy-grid { grid-template-columns: 1fr; }
  .faq summary { font-size: 16px; }
  .foot-in nav { margin-inline-start: 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}