/* Q-Translator website. No external fonts or scripts, so it loads quickly in mainland China too. */
:root {
  --bg: #f5f8ff;
  --bg2: #ffffff;
  --ink: #0b1424;
  --ink2: #4a5872;
  --ink3: #7a879e;
  --line: rgba(20, 50, 110, .1);
  --card: rgba(255, 255, 255, .78);
  --card-solid: #ffffff;
  --blue: #1764e8;
  --blue2: #3aa0ff;
  --blue-soft: #e6f0ff;
  --orange: #ffa820;
  --green-soft: #eaf5ef;
  --shadow: 0 1px 2px rgba(16, 40, 90, .06), 0 12px 32px -12px rgba(16, 40, 90, .18);
  --radius: 22px;
  --wrap: 1120px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #070b14;
    --bg2: #0b111e;
    --ink: #eef3ff;
    --ink2: #a8b4cc;
    --ink3: #7d8aa6;
    --line: rgba(160, 190, 255, .12);
    --card: rgba(18, 27, 46, .72);
    --card-solid: #111a2c;
    --blue: #4d94ff;
    --blue2: #6fc0ff;
    --blue-soft: rgba(77, 148, 255, .14);
    --green-soft: rgba(80, 190, 130, .12);
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 16px 40px -16px rgba(0, 0, 0, .6);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "PingFang TC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; line-height: 1.2; letter-spacing: -.01em; }
p { margin: 0; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--card-solid); padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip:focus { left: 8px; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 6px; }
svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 48px; padding: 0 24px; border-radius: 999px;
  font-weight: 600; font-size: 16px; white-space: nowrap;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn.small { height: 36px; padding: 0 16px; font-size: 14px; }
.btn.primary { background: linear-gradient(135deg, var(--blue), var(--blue2)); color: #fff; box-shadow: 0 8px 20px -8px rgba(23, 100, 232, .7); }
.btn.primary:hover { transform: translateY(-1px); box-shadow: 0 12px 26px -10px rgba(23, 100, 232, .8); }
.btn.ghost { background: var(--card); border: 1px solid var(--line); color: var(--ink); }
.btn.ghost:hover { background: var(--card-solid); }
.btn svg { width: 18px; height: 18px; }

/* Header */
.top {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(16px); backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; white-space: nowrap; }
.brand img { border-radius: 8px; }
.brand small { font-weight: 500; font-size: 13px; color: var(--ink3); }
.nav-links { display: flex; gap: 22px; margin-left: 12px; font-size: 15px; color: var(--ink2); }
.nav-links a:hover { color: var(--ink); }
.nav-end { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.languages { display: flex; background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 3px; }
.languages button {
  border: 0; background: transparent; color: var(--ink2); font: inherit; font-size: 13px;
  min-width: 34px; height: 28px; border-radius: 999px; cursor: pointer;
}
.languages button[aria-pressed="true"] { background: var(--card-solid); color: var(--ink); font-weight: 600; box-shadow: 0 1px 3px rgba(0, 0, 0, .12); }

/* Hero */
.hero { position: relative; padding: 72px 0 56px; overflow: hidden; }
.glow { position: absolute; inset: 0; pointer-events: none; }
.glow i { position: absolute; border-radius: 50%; filter: blur(80px); opacity: .55; }
.glow i:nth-child(1) { width: 560px; height: 560px; right: -120px; top: -160px; background: radial-gradient(circle, #8cc4ff, transparent 70%); }
.glow i:nth-child(2) { width: 380px; height: 380px; right: 280px; top: 260px; background: radial-gradient(circle, #ffd79a, transparent 70%); opacity: .4; }
@media (prefers-color-scheme: dark) {
  .glow i:nth-child(1) { background: radial-gradient(circle, #1d4fb8, transparent 70%); }
  .glow i:nth-child(2) { background: radial-gradient(circle, #7a4a10, transparent 70%); }
}
.hero-inner { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center; }
.pill {
  display: inline-flex; align-items: center; gap: 8px; padding: 5px 14px 5px 6px;
  background: var(--card); border: 1px solid var(--line); border-radius: 999px;
  font-size: 14px; color: var(--ink2);
}
.pill img { border-radius: 6px; }
.hero h1 { font-size: clamp(40px, 6vw, 68px); font-weight: 800; margin: 22px 0 20px; letter-spacing: -.02em; }
.grad { background: linear-gradient(120deg, var(--blue) 10%, var(--blue2) 60%, var(--orange) 110%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { font-size: 19px; color: var(--ink2); max-width: 34em; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 30px; }
.plats { list-style: none; padding: 0; margin: 30px 0 0; display: flex; gap: 18px; flex-wrap: wrap; color: var(--ink3); font-size: 14px; }
.plats li { display: flex; align-items: center; gap: 6px; }
.plats svg { width: 18px; height: 18px; }

.hero-art { position: relative; height: 600px; }
.phone {
  background: #0d1117; padding: 9px; border-radius: 46px;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, .08) inset, 0 30px 60px -20px rgba(10, 40, 100, .45), 0 10px 20px -10px rgba(0, 0, 0, .3);
}
.phone img { width: 100%; height: auto; border-radius: 38px; }
.hero-art .phone { position: absolute; width: 280px; }
.hero-art .front { left: 8%; top: 20px; z-index: 2; }
.hero-art .back { right: 2%; top: 70px; transform: rotate(6deg); opacity: .96; }
.chip {
  position: absolute; z-index: 3; display: flex; flex-direction: column;
  padding: 10px 16px; border-radius: 16px; background: var(--card); border: 1px solid var(--line);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); box-shadow: var(--shadow);
  font-size: 13px; color: var(--ink2);
}
.chip b { font-size: 16px; color: var(--ink); }
.chip.c1 { left: -2%; top: 200px; }
.chip.c2 { right: 0; bottom: 30px; }
.chip.c2 b { color: var(--blue); }

/* Sections */
.section { padding: 88px 20px 0; }
.sec-head { text-align: center; max-width: 720px; margin: 0 auto 44px; }
.kicker { font-size: 14px; font-weight: 700; color: var(--blue); letter-spacing: .06em; text-transform: uppercase; margin-bottom: 12px; }
.sec-head h2, .desk h2, .closing h2 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; }
.sub { margin-top: 14px; font-size: 17px; color: var(--ink2); }

/* Proof strip under the hero */
.proof {
  list-style: none; margin: 56px 0 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr);
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
}
.proof li { padding: 22px 24px; display: flex; align-items: baseline; gap: 12px; }
.proof li + li { border-left: 1px solid var(--line); }
.proof b { font-size: 40px; font-weight: 800; line-height: 1; background: linear-gradient(135deg, var(--blue), var(--blue2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.proof span { font-size: 14px; color: var(--ink2); line-height: 1.4; }

.ico { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 13px; background: var(--blue-soft); color: var(--blue); flex: none; }
.ico svg { width: 22px; height: 22px; }

/* Differentiators: alternating rows */
.feature { display: grid; grid-template-columns: 1.1fr .9fr; gap: 64px; align-items: center; padding: 40px 0; }
.feature + .feature { border-top: 1px solid var(--line); }
.feature.flip .f-copy { order: 2; }
.num { display: inline-block; font: 800 15px/1 ui-monospace, "SF Mono", Menlo, monospace; color: var(--blue); background: var(--blue-soft); padding: 7px 11px; border-radius: 10px; letter-spacing: .04em; }
.num.light { color: #9cc8ff; background: rgba(120, 180, 255, .14); margin-bottom: 18px; }
.f-copy h3 { font-size: clamp(26px, 3.2vw, 36px); font-weight: 800; margin: 18px 0 14px; }
.f-copy > p { font-size: 17px; color: var(--ink2); }
.ticks { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 10px; }
.ticks li { position: relative; padding-left: 30px; color: var(--ink); font-size: 15px; }
.ticks li::before {
  content: ""; position: absolute; left: 0; top: 3px; width: 20px; height: 20px; border-radius: 50%;
  background: var(--blue-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231764e8' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12.5 10 17 19 7'/%3E%3C/svg%3E") center / 12px no-repeat;
}
.f-art { display: flex; justify-content: center; position: relative; }
.f-art::before { content: ""; position: absolute; inset: 10% 5%; border-radius: 50%; background: radial-gradient(circle, rgba(58, 160, 255, .28), transparent 70%); filter: blur(30px); }
.f-art .phone { position: relative; width: 300px; }

/* AI reply mock */
.reply {
  position: relative; width: 100%; max-width: 420px; padding: 22px; border-radius: 28px;
  background: var(--card-solid); border: 1px solid var(--line); box-shadow: var(--shadow); display: grid; gap: 14px; font-size: 14px;
}
.reply small { display: flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; color: var(--ink3); margin-bottom: 4px; }
.reply small svg { width: 14px; height: 14px; color: var(--orange); }
.msg { padding: 14px 16px; border-radius: 18px; }
.msg p { color: var(--ink); }
.msg.in { background: var(--green-soft); }
.msg.in span { display: block; margin-top: 8px; padding-top: 8px; border-top: 1px solid var(--line); font-weight: 600; }
.msg.out { background: linear-gradient(135deg, var(--blue), var(--blue2)); color: #fff; margin-left: 24px; }
.msg.out p { color: #fff; }
.msg.out small { color: rgba(255, 255, 255, .85); }
.msg.out small svg { color: #ffd27a; }
.modes, .tones { display: flex; gap: 8px; flex-wrap: wrap; }
.modes span, .tones span { padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line); color: var(--ink2); font-size: 13px; }
.modes .on, .tones .on { background: var(--blue-soft); color: var(--blue); border-color: transparent; font-weight: 600; }
.points { padding: 10px 14px; border-radius: 14px; border: 1px dashed var(--line); }
.points p { color: var(--ink); }

/* Comparison table */
.compare {
  max-width: 980px; margin: 0 auto; border-radius: var(--radius); overflow: hidden;
  background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow);
}
.c-row { display: grid; grid-template-columns: 1fr 1.5fr 1.6fr; }
.c-row + .c-row { border-top: 1px solid var(--line); }
.c-row > * { padding: 16px 22px; font-size: 15px; }
.c-row > b { font-weight: 600; }
.c-row > span:nth-child(2) { color: var(--ink3); }
.c-row .us { background: var(--blue-soft); color: var(--ink); font-weight: 600; position: relative; padding-left: 46px; }
.c-row:not(.c-head) .us::before {
  content: ""; position: absolute; left: 18px; top: 18px; width: 18px; height: 18px; border-radius: 50%;
  background: var(--blue) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12.5 10 17 19 7'/%3E%3C/svg%3E") center / 11px no-repeat;
}
.c-head > * { font-size: 14px; font-weight: 700; color: var(--ink2); padding-top: 18px; padding-bottom: 18px; }
.c-head .us { display: flex; align-items: center; gap: 8px; padding-left: 22px; color: var(--blue); font-size: 16px; }
.c-head .us img { border-radius: 6px; }

/* Small details */
.mini { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.mini article { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.mini h3 { font-size: 17px; margin: 16px 0 6px; }
.mini p { font-size: 14px; color: var(--ink2); }

/* Mac + Android */
.desk {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 20px;
}
.desk-copy {
  background: linear-gradient(160deg, #0f1c36, #0a1222); color: #e9f0ff;
  border-radius: 28px; padding: 40px; box-shadow: var(--shadow);
}
.desk-copy .kicker { color: #7fb8ff; }
.desk-copy > p { color: #b4c2dc; margin-top: 14px; }
.desk-copy.android { background: var(--card); color: var(--ink); border: 1px solid var(--line); }
.desk-copy.android .kicker { color: #1f9d5b; }
.desk-copy.android h3 { font-size: 26px; font-weight: 800; }
.desk-copy.android > p { color: var(--ink2); }
.keys { list-style: none; padding: 0; margin: 26px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 10px 18px; }
.keys li { display: flex; align-items: center; gap: 12px; font-size: 15px; }
.keys li > span { display: flex; gap: 4px; flex: none; }
.keys em { font-style: normal; color: #d4def2; }
kbd {
  display: inline-grid; place-items: center; min-width: 32px; height: 32px; padding: 0 8px;
  font: 600 15px/1 -apple-system, BlinkMacSystemFont, sans-serif; color: #fff;
  background: linear-gradient(#26324a, #1a2438); border: 1px solid rgba(255, 255, 255, .14);
  border-bottom-width: 3px; border-radius: 8px;
}
.desk .note { margin-top: 22px; font-size: 14px; color: #8fa0c0; }

.desk-copy.android { display: flex; flex-direction: column; }
.sel { margin-top: auto; padding-top: 28px; }
.sel p { font-size: 22px; font-weight: 600; color: var(--ink); }
.sel mark { background: rgba(58, 160, 255, .3); color: inherit; border-radius: 3px; padding: 0 2px; }
.sel-menu { display: inline-flex; margin-top: 12px; background: #1f2633; border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); }
.sel-menu span { padding: 9px 13px; font-size: 13px; color: #e8edf6; display: flex; align-items: center; gap: 6px; }
.sel-menu span + span { border-left: 1px solid rgba(255, 255, 255, .1); }
.sel-menu .on { background: var(--blue); color: #fff; font-weight: 600; }
.sel-menu img { border-radius: 4px; }

/* Downloads */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.dl {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px;
  box-shadow: var(--shadow); display: flex; flex-direction: column;
}
.dl-head { display: flex; align-items: center; gap: 14px; }
.dl-head .ico { width: 48px; height: 48px; }
.dl h3 { font-size: 21px; }
.dl .req { font-size: 13px; color: var(--ink3); }
.dl ul { list-style: none; margin: 22px 0 0; padding: 0; display: grid; gap: 10px; }
.dl-btn {
  display: flex; align-items: center; gap: 12px; width: 100%; padding: 12px 16px; border-radius: 14px;
  border: 1px solid var(--line); background: var(--card-solid); color: var(--ink);
}
.dl-btn svg { width: 20px; height: 20px; flex: none; }
.dl-btn span { min-width: 0; display: flex; flex-direction: column; line-height: 1.3; }
.dl-btn small { font-size: 12px; color: var(--ink3); }
.dl-btn b { font-size: 15px; }
.dl-btn .tag { font-style: normal; margin-left: auto; font-size: 12px; font-weight: 600; padding: 3px 9px; border-radius: 999px; white-space: nowrap; }
a.dl-btn:hover { border-color: var(--blue); }
a.dl-btn.main { background: linear-gradient(135deg, var(--blue), var(--blue2)); color: #fff; border-color: transparent; }
a.dl-btn.main small { color: rgba(255, 255, 255, .8); }
.dl-btn.off { color: var(--ink3); cursor: default; border-style: dashed; background: transparent; }
.dl-btn.off .tag { background: var(--blue-soft); color: var(--blue); }

/* FAQ */
.faq { max-width: 780px; margin: 0 auto; display: grid; gap: 12px; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 0 22px; }
.faq summary {
  cursor: pointer; list-style: none; padding: 18px 28px 18px 0; font-weight: 600; font-size: 17px; position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 4px; top: 50%; width: 9px; height: 9px; margin-top: -7px;
  border-right: 2px solid var(--ink3); border-bottom: 2px solid var(--ink3); transform: rotate(45deg); transition: transform .2s;
}
.faq details[open] summary::after { transform: rotate(-135deg); margin-top: -2px; }
.faq details p { color: var(--ink2); padding-bottom: 20px; }

/* Closing */
.closing {
  text-align: center; padding: 60px 24px; border-radius: 32px;
  background: radial-gradient(120% 140% at 50% 0%, var(--blue-soft), transparent 70%), var(--card);
  border: 1px solid var(--line);
}
.closing img { margin: 0 auto 22px; border-radius: 22px; box-shadow: 0 16px 30px -12px rgba(23, 100, 232, .5); }
.closing h2 { margin-bottom: 26px; }

/* Footer */
.footer { margin-top: 88px; border-top: 1px solid var(--line); padding: 30px 0 40px; font-size: 14px; color: var(--ink2); }
.foot { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.foot-brand { display: flex; align-items: center; gap: 10px; color: var(--ink); }
.foot-brand img { border-radius: 6px; }
.foot-links { display: flex; gap: 20px; flex-wrap: wrap; }
.foot-links a:hover { color: var(--ink); }
.copy { margin-left: auto; color: var(--ink3); }

/* Reveal on scroll (only when JS is on) */
.js .reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
}

/* Layout: tablet */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-copy { display: flex; flex-direction: column; align-items: center; }
  .cta, .plats { justify-content: center; }
  .hero-art { height: 560px; max-width: 520px; width: 100%; margin: 0 auto; }
  .desk { grid-template-columns: 1fr; }
  .proof { grid-template-columns: repeat(2, 1fr); }
  .proof li:nth-child(3) { border-left: 0; }
  .proof li:nth-child(n+3) { border-top: 1px solid var(--line); }
  .feature { grid-template-columns: 1fr; gap: 36px; }
  .feature.flip .f-copy { order: 0; }
  .mini { grid-template-columns: repeat(2, 1fr); }
  .dl-grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; }
}
/* Layout: phone */
@media (max-width: 640px) {
  .nav { gap: 12px; }
  .nav-links, .brand small { display: none; }
  .hero { padding-top: 44px; }
  .lead { font-size: 17px; }
  .hero-art { height: 470px; }
  .hero-art .phone { width: 218px; }
  .hero-art .front { left: 2%; }
  .hero-art .back { right: 0; top: 50px; }
  .chip.c1 { left: 0; top: 160px; }
  .chip.c2 { bottom: 10px; }
  .section { padding-top: 68px; }
  .desk-copy { padding: 28px 22px; }
  .proof { margin-top: 40px; }
  .nav-end .btn { display: none; }
  .proof li { padding: 16px; flex-direction: column; gap: 6px; }
  .proof b { font-size: 32px; }
  .proof span { font-size: 13px; }
  .f-art .phone { width: 250px; }
  .mini { grid-template-columns: 1fr; }
  .c-row { grid-template-columns: 1fr 1fr; }
  .c-row > b { grid-column: 1 / -1; padding-bottom: 0; }
  .c-head > :first-child { display: none; }
  .c-row > * { padding: 12px 14px; font-size: 14px; }
  .c-row .us { padding-left: 36px; }
  .c-row:not(.c-head) .us::before { left: 12px; top: 14px; }
  .c-head .us { padding-left: 14px; }
  .keys { grid-template-columns: 1fr; }
  .copy { margin-left: 0; }
}
.dl-head .tag-you { margin-left: auto; align-self: flex-start; font-size: 12px; font-weight: 600; color: var(--blue); background: var(--blue-soft); padding: 3px 10px; border-radius: 999px; white-space: nowrap; }