/* 量子远程官网。颜色和 App 一致：深色为主，跟随系统切浅色。 */
:root {
  color-scheme: dark light;
  --bg: #0B0D12;
  --bg-soft: #10131A;
  --card: #161A22;
  --card2: #1F2531;
  --line: #262B36;
  --text: #F2F4F8;
  --text2: #9AA3B2;
  --muted: #5B6475;
  --primary: #3D8BFF;
  --primary-hover: #6AA6FF;
  --on-primary: #0B0D12;
  --orange: #FF8A3D;
  --green: #34C77B;
  --glow: rgba(61, 139, 255, .16);
  --shadow: 0 18px 50px rgba(0, 0, 0, .45);
  --header: rgba(11, 13, 18, .78);
  --radius: 16px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "PingFang SC", "Hiragino Sans", "Noto Sans CJK SC", "Microsoft YaHei", "Apple SD Gothic Neo", "Malgun Gothic", Roboto, "Helvetica Neue", Arial, sans-serif;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #F4F6FA;
    --bg-soft: #EAEEF5;
    --card: #FFFFFF;
    --card2: #EEF1F6;
    --line: #DFE3EA;
    --text: #0E1116;
    --text2: #545D6E;
    --muted: #8A93A3;
    --primary: #1F6FEB;
    --primary-hover: #1A5FCC;
    --on-primary: #FFFFFF;
    --orange: #C2581A;
    --green: #1F9D5B;
    --glow: rgba(31, 111, 235, .12);
    --shadow: 0 18px 50px rgba(20, 30, 50, .14);
    --header: rgba(244, 246, 250, .82);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 72px; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--font); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; }
/* 文案由脚本按语言填进来，填好之前先不显示，避免闪一下空白结构 */
html.i18n-loading body { visibility: hidden; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); }
img, svg { display: block; }
h1, h2, h3 { margin: 0; line-height: 1.2; letter-spacing: -.01em; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 6px; }
.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.skip { position: absolute; left: -9999px; top: 8px; z-index: 100; background: var(--card); padding: 8px 12px; border-radius: 8px; }
.skip:focus { left: 8px; }
.ic { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; flex: none; }

/* ---------- 顶栏 ---------- */
.top { position: sticky; top: 0; z-index: 50; background: var(--header); backdrop-filter: saturate(160%) blur(16px); -webkit-backdrop-filter: saturate(160%) blur(16px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 20px; min-height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 17px; white-space: nowrap; min-width: 0; }
.brand:hover { color: var(--text); }
.brand img { width: 30px; height: 30px; border-radius: 8px; flex: none; }
.brand span { overflow: hidden; text-overflow: ellipsis; }
.nav { display: flex; gap: 22px; margin-left: 12px; }
.nav a { color: var(--text2); font-size: 14.5px; font-weight: 500; white-space: nowrap; }
.nav a:hover { color: var(--text); }

/* 语言切换：地球 + 当前语言 + 下拉箭头；当前语言前打勾 */
.lang { position: relative; margin-left: auto; flex: none; }
.lang-btn { display: flex; align-items: center; gap: 6px; height: 36px; padding: 0 10px 0 9px; font: inherit; font-size: 14px; font-weight: 600; color: var(--text); background: var(--card); border: 1px solid var(--line); border-radius: 999px; cursor: pointer; white-space: nowrap; }
.lang-btn:hover { border-color: var(--muted); }
.lang-btn .ic { width: 17px; height: 17px; color: var(--text2); }
.lang-btn .chev { width: 14px; height: 14px; stroke-width: 2.2; transition: transform .15s; }
.lang-btn[aria-expanded="true"] .chev { transform: rotate(180deg); }
.lang-btn .cur { max-width: 42vw; overflow: hidden; text-overflow: ellipsis; }
.lang-menu { position: absolute; right: 0; top: calc(100% + 8px); min-width: 210px; max-height: min(70vh, 560px); overflow-y: auto; margin: 0; padding: 6px; list-style: none; background: var(--card); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); }
.lang-menu[hidden] { display: none; }
.lang-menu button { display: flex; align-items: center; gap: 10px; width: 100%; min-height: 40px; padding: 0 12px 0 8px; font: inherit; font-size: 14.5px; color: var(--text); background: none; border: 0; border-radius: 9px; cursor: pointer; text-align: left; white-space: nowrap; }
.lang-menu button:hover, .lang-menu button:focus-visible { background: var(--card2); outline: none; }
.lang-menu .tick { width: 16px; height: 16px; flex: none; color: var(--primary); stroke-width: 2.6; visibility: hidden; }
.lang-menu button[aria-current="true"] { font-weight: 700; }
.lang-menu button[aria-current="true"] .tick { visibility: visible; }
.lang-menu img { width: 22px; height: 15px; border-radius: 3px; flex: none; box-shadow: 0 0 0 1px var(--line); object-fit: cover; }

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; gap: 12px; min-height: 56px; padding: 8px 22px 8px 18px; border-radius: 14px; font-weight: 700; font-size: 16px; line-height: 1.2; border: 1px solid transparent; cursor: pointer; text-align: left; }
.btn .ic { width: 26px; height: 26px; }
.btn small { display: block; font-size: 12px; font-weight: 500; opacity: .75; margin-bottom: 2px; }
.btn.store { background: var(--text); color: var(--bg); }
.btn.store:hover { color: var(--bg); opacity: .9; }
.btn.store svg.apple { width: 24px; height: 24px; fill: currentColor; stroke: none; }
.btn.ghost { background: var(--card); color: var(--text); border-color: var(--line); }
.btn.ghost:hover { color: var(--text); border-color: var(--muted); }
.btn.primary { background: var(--primary); color: var(--on-primary); }
.btn.primary:hover { background: var(--primary-hover); color: var(--on-primary); }
.btn.block { width: 100%; justify-content: center; text-align: center; }

/* ---------- 首屏 ---------- */
.hero { position: relative; overflow: hidden; padding: 72px 0 80px; }
.hero::before { content: ""; position: absolute; inset: -30% -10% auto auto; width: 720px; height: 720px; background: radial-gradient(closest-side, var(--glow), transparent); pointer-events: none; }
.hero .wrap { position: relative; display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 56px; }
.pill { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 999px; background: var(--card); border: 1px solid var(--line); color: var(--text2); font-size: 13.5px; font-weight: 600; }
.pill i { width: 8px; height: 8px; border-radius: 50%; background: var(--orange); }
.hero h1 { margin-top: 22px; font-size: clamp(36px, 5.4vw, 60px); font-weight: 800; letter-spacing: -.025em; line-height: 1.08; }
.hero h1 em { font-style: normal; color: var(--primary); }
:lang(zh) .hero h1, :lang(ja) .hero h1, :lang(ko) .hero h1 { letter-spacing: -.01em; line-height: 1.18; }
.lead { margin-top: 20px; font-size: 18.5px; color: var(--text2); max-width: 560px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.req { margin-top: 18px; font-size: 13.5px; color: var(--text2); }
.hero-art { display: flex; justify-content: center; }

/* ---------- 手机样机（截图占位：按设计稿用 HTML 画，正式截图出来后替换） ---------- */
.phone { position: relative; width: 300px; aspect-ratio: 390 / 844; padding: 10px; border-radius: 46px; background: #05060A; box-shadow: var(--shadow), 0 0 0 1px #2A303C inset; flex: none; }
.phone .scr { position: relative; height: 100%; border-radius: 37px; overflow: hidden; background: var(--bg); display: flex; flex-direction: column; padding: 40px 14px 16px; font-size: 11px; line-height: 1.35; }
.phone .scr::before { content: ""; position: absolute; top: 9px; left: 50%; width: 82px; height: 22px; margin-left: -41px; border-radius: 12px; background: #05060A; }
.m-title { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 16.5px; font-weight: 800; }
.m-title > span:first-child { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.m-title .btns { display: flex; gap: 6px; flex: none; }
.m-ibtn { width: 30px; height: 30px; border-radius: 9px; background: var(--card); display: grid; place-items: center; color: var(--text); }
.m-ibtn .ic { width: 15px; height: 15px; }
.m-h { margin: 16px 0 8px; font-size: 11px; font-weight: 600; color: var(--text2); }
.m-dev { display: flex; align-items: center; gap: 9px; padding: 11px; border-radius: 12px; background: var(--card); margin-bottom: 8px; }
.m-dev .ico { width: 34px; height: 34px; border-radius: 9px; background: var(--card2); display: grid; place-items: center; flex: none; color: var(--text); }
.m-dev .ico .ic { width: 19px; height: 19px; }
.m-dev .info { flex: 1; min-width: 0; }
.m-dev b { display: block; font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.m-dev .info > span { display: flex; align-items: center; gap: 5px; color: var(--text2); font-size: 10px; white-space: nowrap; overflow: hidden; }
.m-dev .info > span::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--green); flex: none; }
.m-dev.off .info > span::before { background: var(--muted); }
.m-go { flex: none; padding: 7px 12px; border-radius: 999px; background: var(--primary); color: var(--on-primary); font-weight: 700; font-size: 11px; }
.m-dev.off .m-go { background: var(--card2); color: var(--text2); }
.m-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.m-tile { padding: 11px; border-radius: 12px; background: var(--card); min-height: 92px; display: flex; flex-direction: column; gap: 8px; }
.m-tile .ico { width: 30px; height: 30px; border-radius: 9px; background: var(--card2); color: var(--primary); display: grid; place-items: center; }
.m-tile .ico .ic { width: 17px; height: 17px; }
.m-tile b { font-size: 12px; }
.m-tile span { color: var(--text2); font-size: 10px; }
.m-link { margin-top: 2px; color: var(--primary); font-size: 10.5px; }
.m-foot { margin-top: auto; padding: 12px; border-radius: 12px; background: var(--card); display: flex; align-items: center; gap: 8px; font-weight: 500; }
.m-foot .ic { width: 15px; height: 15px; color: var(--text2); }
/* 遥控画面 */
.m-mac { margin: 4px -4px 0; aspect-ratio: 16 / 10; border-radius: 8px; overflow: hidden; background: linear-gradient(135deg, #2B4A8C, #6B3FA0 55%, #D4704A); position: relative; }
.m-mac .bar { position: absolute; left: 0; right: 0; top: 0; height: 7px; background: rgba(0,0,0,.35); }
.m-mac .win { position: absolute; border-radius: 4px; background: rgba(245,247,250,.92); box-shadow: 0 4px 10px rgba(0,0,0,.3); }
.m-mac .win::before { content: ""; position: absolute; left: 4px; top: 3px; width: 14px; height: 3px; border-radius: 2px; background: linear-gradient(90deg, #FF5F57 0 3px, transparent 3px 5.5px, #FEBC2E 5.5px 8.5px, transparent 8.5px 11px, #28C840 11px); }
.m-mac .w1 { left: 8%; top: 18%; width: 52%; height: 60%; }
.m-mac .w2 { left: 48%; top: 32%; width: 44%; height: 52%; background: rgba(30,34,44,.94); }
.m-mac .dock { position: absolute; left: 22%; right: 22%; bottom: 4px; height: 9px; border-radius: 4px; background: rgba(255,255,255,.35); }
.m-mac .cursor { position: absolute; left: 62%; top: 58%; width: 10px; height: 12px; }
.m-keys { display: flex; gap: 5px; margin: 10px 0 8px; flex-wrap: nowrap; overflow: hidden; }
.m-keys span { padding: 5px 8px; border-radius: 7px; background: var(--card); font-size: 10px; font-weight: 600; white-space: nowrap; }
.m-pad { flex: 1; border-radius: 14px; background: var(--card); border: 1px solid var(--line); position: relative; display: grid; place-items: center; color: var(--text2); font-size: 10.5px; min-height: 120px; }
.m-pad .lr { position: absolute; left: 0; right: 0; bottom: 0; display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); }
.m-pad .lr span { padding: 9px; text-align: center; font-weight: 600; }
.m-pad .lr span + span { border-left: 1px solid var(--line); }
.m-tools { display: flex; justify-content: space-around; margin-top: 10px; color: var(--text2); }
.m-tools .ic { width: 17px; height: 17px; }
/* 投屏 */
.m-nav { display: flex; align-items: center; gap: 4px; font-size: 15px; font-weight: 800; margin-left: -4px; }
.m-nav .ic { width: 17px; height: 17px; }
.m-seg { display: flex; gap: 3px; margin-top: 12px; padding: 3px; border-radius: 11px; background: var(--card); }
.m-seg span { flex: 1; padding: 8px 4px; border-radius: 8px; text-align: center; font-weight: 600; color: var(--text2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.m-seg span.on { background: var(--primary); color: var(--on-primary); font-weight: 700; }
.m-dev.sel { box-shadow: 0 0 0 1.5px var(--primary) inset; }
.m-dev .check { width: 20px; height: 20px; border-radius: 50%; background: var(--primary); color: var(--on-primary); display: grid; place-items: center; flex: none; }
.m-dev .check .ic { width: 12px; height: 12px; stroke-width: 2.6; }
.m-card { margin-top: 10px; padding: 14px; border-radius: 12px; background: var(--card); }
.m-card h4 { margin: 0 0 12px; font-size: 13px; }
.m-rec { display: flex; align-items: center; gap: 12px; }
.m-rec .dot { width: 62px; height: 62px; border-radius: 50%; border: 3px solid var(--primary); display: grid; place-items: center; flex: none; background: var(--bg); }
.m-rec .dot::after { content: ""; width: 28px; height: 28px; border-radius: 50%; background: var(--primary); }
.m-rec ol { margin: 0; padding: 0; list-style: none; display: grid; gap: 7px; min-width: 0; }
.m-rec li { display: flex; gap: 6px; align-items: flex-start; font-size: 10.5px; }
.m-rec li b { width: 16px; height: 16px; border-radius: 50%; background: var(--card2); display: grid; place-items: center; flex: none; font-size: 9px; }
.m-tip { margin-top: 10px; padding: 10px; border-radius: 10px; border: 1px solid var(--line); color: var(--text2); font-size: 10px; display: flex; gap: 6px; }
.m-tip .ic { width: 14px; height: 14px; color: var(--orange); }

/* ---------- 区块 ---------- */
section.block { padding: 88px 0; }
section.alt { background: var(--bg-soft); }
.sec-head { max-width: 680px; margin-bottom: 44px; }
.eyebrow { color: var(--primary); font-weight: 700; font-size: 14px; letter-spacing: .02em; }
.sec-head h2 { margin-top: 10px; font-size: clamp(28px, 3.6vw, 40px); font-weight: 800; }
.sec-head p { margin-top: 14px; color: var(--text2); font-size: 17px; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature { padding: 26px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); }
.feature .ico { width: 46px; height: 46px; border-radius: 12px; background: var(--card2); color: var(--primary); display: grid; place-items: center; }
.feature:nth-child(3) .ico, .feature:nth-child(4) .ico { color: var(--orange); }
.feature h3 { margin-top: 18px; font-size: 19px; }
.feature p { margin-top: 8px; color: var(--text2); font-size: 15px; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; counter-reset: step; list-style: none; margin: 0; padding: 0; }
.steps li { padding: 26px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); counter-increment: step; }
.steps li::before { content: counter(step); display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--primary); color: var(--on-primary); font-weight: 800; }
.steps h3 { margin-top: 16px; font-size: 18px; }
.steps p { margin-top: 8px; color: var(--text2); font-size: 15px; }
.shots { display: flex; justify-content: center; gap: 36px; flex-wrap: wrap; }
.shots figure { margin: 0; display: flex; flex-direction: column; align-items: center; gap: 18px; }
.shots figcaption { text-align: center; }
.shots figcaption b { display: block; font-size: 16px; }
.shots figcaption span { color: var(--text2); font-size: 14px; }
.shots .phone { width: 260px; }
.shot-note { margin-top: 28px; text-align: center; color: var(--muted); font-size: 13px; }
.downloads { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.dl { padding: 30px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); display: flex; flex-direction: column; gap: 14px; }
.dl .head { display: flex; align-items: center; gap: 14px; }
.dl .head .ico { width: 52px; height: 52px; border-radius: 14px; background: var(--card2); color: var(--primary); display: grid; place-items: center; flex: none; }
.dl .head .ico .ic { width: 28px; height: 28px; }
.dl h3 { font-size: 20px; }
.dl .sub { color: var(--text2); font-size: 14px; }
.dl p { color: var(--text2); font-size: 15px; }
.dl .btn { margin-top: auto; align-self: flex-start; }
.soon { display: inline-block; margin-left: 4px; padding: 1px 8px; border-radius: 999px; background: var(--card2); color: var(--orange); font-size: 12px; font-weight: 700; vertical-align: 2px; }
.faq { max-width: 820px; display: grid; gap: 10px; }
.faq details { border-radius: 14px; background: var(--card); border: 1px solid var(--line); }
.faq summary { list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 18px 22px; font-weight: 650; font-size: 16.5px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary .ic { width: 18px; height: 18px; color: var(--text2); transition: transform .15s; }
.faq details[open] summary .ic { transform: rotate(45deg); }
.faq details p { padding: 0 22px 20px; color: var(--text2); font-size: 15.5px; }

/* ---------- 页脚 ---------- */
.foot { border-top: 1px solid var(--line); padding: 36px 0 44px; color: var(--text2); font-size: 14px; }
.foot .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px 28px; }
.foot nav { display: flex; flex-wrap: wrap; gap: 8px 22px; }
.foot a { color: var(--text2); }
.foot a:hover { color: var(--text); }

/* ---------- 隐私政策 / 用户协议 ---------- */
.legal { max-width: 760px; padding-top: 56px; padding-bottom: 88px; }
.legal h1 { font-size: clamp(30px, 4vw, 42px); font-weight: 800; }
.legal .updated { margin-top: 10px; color: var(--text2); font-size: 14px; }
.legal .draft { margin-top: 18px; padding: 12px 16px; border-radius: 12px; background: var(--card); border: 1px solid var(--line); color: var(--text2); font-size: 14.5px; }
.legal .intro { margin-top: 24px; font-size: 17px; }
.legal h2 { margin-top: 36px; font-size: 21px; }
.legal p { margin-top: 10px; color: var(--text2); }
.legal ul { margin: 10px 0 0; padding-left: 22px; color: var(--text2); }
.legal li { margin-top: 6px; }

/* ---------- 邀请落地页 ---------- */
.invite { min-height: calc(100vh - 61px); min-height: calc(100dvh - 61px); display: flex; align-items: center; justify-content: center; padding: 40px 0 56px; }
.invite .wrap { max-width: 480px; display: flex; flex-direction: column; align-items: center; gap: 22px; text-align: center; }
.invite .app-icon { width: 92px; height: 92px; border-radius: 22px; box-shadow: var(--shadow); }
.invite h1 { font-size: clamp(26px, 6vw, 32px); font-weight: 800; }
.invite .lead { margin-top: -8px; font-size: 16.5px; }
.share { width: 100%; border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); text-align: left; }
.share[hidden] { display: none; }
.share .who { display: flex; align-items: center; gap: 12px; padding: 16px; }
.share .avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--primary); color: var(--on-primary); display: grid; place-items: center; font-weight: 800; font-size: 19px; flex: none; }
.share .who b { display: block; font-size: 16px; }
.share .who span { color: var(--text2); font-size: 14px; }
.share .row { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 48px; padding: 0 16px; border-top: 1px solid var(--line); font-size: 15px; }
.share .row span:first-child { color: var(--text2); }
.share .row span:last-child { font-weight: 600; text-align: right; }
.share .row.warn { justify-content: flex-start; gap: 10px; padding: 12px 16px; }
.share .row.warn .ic { width: 18px; height: 18px; color: var(--orange); }
.share .row.warn span { color: var(--text) !important; font-weight: 500 !important; text-align: left !important; }
.invite .actions { width: 100%; display: grid; gap: 12px; }
.invite .actions .btn { justify-content: center; text-align: center; }
.invite .hint { color: var(--text2); font-size: 14.5px; }
.invite .code { color: var(--muted); font-size: 13px; }
.invite .code b { color: var(--text2); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .04em; }
.opening { display: inline-flex; align-items: center; gap: 8px; color: var(--text2); font-size: 14px; }
.opening[hidden] { display: none; }
.opening::before { content: ""; width: 14px; height: 14px; border-radius: 50%; border: 2px solid var(--line); border-top-color: var(--primary); animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .opening::before { animation: none; } html { scroll-behavior: auto; } }

/* ---------- 窄屏 ---------- */
@media (max-width: 960px) {
  .nav { display: none; }
  .hero .wrap { grid-template-columns: 1fr; gap: 48px; }
  .features, .steps { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .top .wrap { gap: 12px; min-height: 56px; }
  .brand { font-size: 16px; }
  .brand img { width: 28px; height: 28px; }
  .hero { padding: 44px 0 56px; }
  .lead { font-size: 17px; }
  .cta .btn { flex: 1 1 100%; }
  .features, .steps, .downloads { grid-template-columns: 1fr; }
  section.block { padding: 64px 0; }
  .sec-head { margin-bottom: 32px; }
  .phone { width: 270px; }
  .shots { gap: 44px; }
  .dl { padding: 24px; }
  .dl .btn { align-self: stretch; }
  .faq summary { padding: 16px 18px; }
  .faq details p { padding: 0 18px 18px; }
}
@media (max-width: 360px) {
  .lang-btn .cur { max-width: 30vw; }
}