@font-face{font-family:'MiSans Bold TV';src:url(misans-bold-hero.woff2) format('woff2');font-weight:700;}
@font-face{font-family:'Inter Var';font-display:swap;src:url(inter-var.woff2) format('woff2');font-weight:100 900;}
@font-face{
  font-family:'MiSans TV';
  src:url(misans-subset.woff2) format('woff2');
  font-weight:400;font-style:normal;font-display:swap;
}
@font-face{
  font-family:'Inter TV';
  src:url(inter-tv.woff2) format('woff2');
  font-weight:100 900;font-style:normal;font-display:swap;
}
  :root{
    --bg:#06070a;
    --panel:#0b0d12;
    --ink:#eef1f4;
    --sub:#98a0ac;
    --faint:#5b6270;
    --line:rgba(255,255,255,.09);
    --line-soft:rgba(255,255,255,.055);
    --cyan:#6ee7ff;
    --violet:#9a8bff;
    --radius:22px;
    --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
  }
  *{box-sizing:border-box}
  picture{display:contents}
  html{scroll-behavior:smooth}
  body{
    margin:0;background:var(--bg);color:var(--ink);
    font-family:'MiSans TV','Inter TV',-apple-system,BlinkMacSystemFont,'SF Pro Text','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,sans-serif;
    font-size:17px;line-height:1.65;letter-spacing:.004em;
    -webkit-font-smoothing:antialiased;
  }
  body::before{
    content:"";position:fixed;inset:0;pointer-events:none;z-index:0;
    background:
      radial-gradient(70% 52% at 50% -6%,rgba(110,231,255,.13),transparent 62%),
      radial-gradient(52% 40% at 92% 22%,rgba(154,139,255,.08),transparent 70%);
  }
  main,header,footer{position:relative;z-index:1}
  .wrap{max-width:1120px;margin:0 auto;padding:0 28px}
  @media(max-width:760px){.wrap{padding:0 34px}.hero-inner{padding:0 34px}}
  a{color:inherit;text-decoration:none}
  .mono{font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint)}
  /* A section carries 130–210 px of its own top padding — the gap between chapters. An anchor
     used to jump to the box, so 功能 landed with a whole screen of nothing above its title. The
     jump now subtracts that padding, and every menu item meets its own first line (2.24). */
  section[id]{scroll-margin-top:calc(76px - var(--sec-pad,0px))}
  div[id]{scroll-margin-top:84px}
  #why,#features{--sec-pad:clamp(96px,13vh,160px)}
  #install,#faq{--sec-pad:clamp(170px,23vh,270px)}

  header{position:sticky;top:0;z-index:30;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);background:rgba(6,7,10,0);border-bottom:1px solid transparent;transition:background .35s ease,border-color .35s ease}
  header.solid{background:rgba(6,7,10,.74);border-bottom-color:var(--line-soft)}
  header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
  .brand{display:flex;align-items:center;gap:10px;font-weight:650;letter-spacing:-.01em}
  .brand img{height:31.5px;width:auto;display:block}
  nav{display:flex;gap:28px;align-items:center}
  nav a{font-size:14px;color:var(--sub);transition:color .18s}
  nav a:hover{color:var(--ink)}
  nav a.cta{display:inline-flex;align-items:center;justify-content:center;min-width:96px;color:#07080a;background:#f4f7f9;border:1px solid transparent;padding:7px 20px;border-radius:999px;font-weight:600;box-shadow:0 8px 24px rgba(110,231,255,.22)}
  nav a.cta:hover{background:#fff;box-shadow:0 10px 28px rgba(110,231,255,.34)}
  @media(max-width:760px){nav a:not(.cta){display:none}}

  /* hero — full-bleed background + scroll parallax */
  .hero{--hz:clamp(66px,11.6vw,158px);position:relative;isolation:isolate;min-height:100vh;min-height:100svh;display:flex;flex-direction:column;align-items:center;justify-content:center;overflow:hidden;padding:86px 0 150px;text-align:center}
  .hero-bg{position:absolute;inset:-16% 0;z-index:-2;will-change:transform;transform:translate3d(0,0,0)}
  .hero-bg img{display:block;width:100%;height:100%;object-fit:cover;object-position:center 46%;transform:scale(1.03);filter:brightness(.82) saturate(1.06)}
  .hero::after{content:"";position:absolute;inset:0;z-index:-1;pointer-events:none;background:
    radial-gradient(62% 50% at 50% 44%,rgba(10,7,4,.30),rgba(10,7,4,.48) 68%,rgba(10,7,4,.82) 100%),
    linear-gradient(180deg,rgba(10,7,4,.66) 0%,rgba(10,7,4,.16) 24%,rgba(10,7,4,.26) 58%,rgba(10,7,4,.86) 88%,var(--bg) 100%)}
  .hero-inner{position:relative;z-index:1;width:100%;max-width:1140px;margin:0 auto;padding:0 28px}
  .chip{display:inline-flex;align-items:center;gap:9px;padding:7px 15px;border:1px solid rgba(255,255,255,.18);border-radius:999px;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:#d3dbe3;background:rgba(6,8,12,.48)}
  .chip i{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 12px var(--cyan)}
  .hero h1{margin:0;font-size:inherit;font-weight:700;letter-spacing:0;display:flex;align-items:flex-end;justify-content:center;height:calc(var(--hz)*2.34)}
  .hero h1 .brandmark{display:block;font-family:"Didot","Bodoni 72","Songti SC","Times New Roman",serif;font-weight:400;font-size:18px;letter-spacing:.72em;text-indent:.72em;text-transform:uppercase;color:rgba(255,255,255,.95)}
  .slogan.oneline{font-family:'Inter Var','MiSans TV',sans-serif;font-weight:830;font-size:clamp(38px,7.2vw,104px);letter-spacing:-.03em;white-space:nowrap}
.slogan{display:block;font-family:'Inter Var','PingFang SC','HarmonyOS Sans SC','MiSans','Microsoft YaHei',sans-serif;margin:0;font-size:var(--hz);line-height:1.12;letter-spacing:-.042em;font-weight:100;
    background:linear-gradient(98deg,#ffffff 6%,#e4f5ff 40%,#d3caff 96%);-webkit-background-clip:text;background-clip:text;color:transparent;
    filter:drop-shadow(0 18px 50px rgba(0,0,0,.55))}
  .hero h1 .slogan span{display:block}
  .hero h1 .slogan span:first-child{letter-spacing:.17em;text-indent:.17em}
  .hero h1 .slogan span+span{font-size:1.08em;letter-spacing:.06em;text-indent:.06em}
  .slogan.en{font-family:'Inter Var','MiSans TV',sans-serif;font-weight:100;font-size:min(calc((100vw - 56px)/6.95),156px,calc(var(--hz)*1.1));line-height:1.06;letter-spacing:0}
  .hero h1 .slogan.en span:first-child{letter-spacing:0;text-indent:0}
  .hero h1 .slogan.en span+span{font-size:1em;letter-spacing:0;text-indent:0}
  /* CN title: always one line, bottom-aligned in the shared h1 box — EN/CN switch feels like a translation slide */
  html:not([lang="en"]) .hero h1 .slogan{font-size:min(calc((100vw - 56px)/6.63),163px);line-height:1.15;white-space:nowrap;margin-bottom:calc(var(--hz)*0.32)}
  html:not([lang="en"]) .hero h1 .slogan span{display:inline}
  html:not([lang="en"]) .hero h1 .slogan span:first-child{letter-spacing:.05em;text-indent:.05em}
  html:not([lang="en"]) .hero h1 .slogan span+span{margin-left:.28em;font-size:1em;letter-spacing:.05em;text-indent:0}
  .hero .lead{margin:26px auto 0;max-width:660px;font-size:clamp(17px,2vw,21px);color:rgba(240,246,251,.92);line-height:1.8;text-shadow:0 2px 22px rgba(0,0,0,.65);text-wrap:balance;min-height:5.4em}
  .hero .closer{margin:34px 0 0;font-size:clamp(23px,3.2vw,36px);font-weight:650;letter-spacing:-.03em;color:#fff;text-shadow:0 3px 28px rgba(0,0,0,.65)}
  .actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin:36px 0 0}
  .btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:20px 40px;border-radius:999px;font-size:18px;font-weight:600;transition:transform .16s ease,border-color .18s,background .18s}
  .btn.primary{min-width:384px}
  .btn.ghost{min-width:244px}
  .btn:hover{transform:translateY(-1px)}
  .btn.primary{background:#f4f7f9;color:#07080a;box-shadow:0 14px 42px rgba(110,231,255,.3);padding-left:62px;padding-right:62px}
  .btn.primary .btn-logo{display:block;width:26px;height:26px;margin-left:1px}
  .btn.primary .btn-name{font-size:22px;font-weight:600;letter-spacing:.02em;margin-left:-2px}
  .btn.primary svg{width:23px;height:23px;stroke:currentColor;fill:none;stroke-width:2.1;stroke-linecap:round;stroke-linejoin:round}
  .btn.ghost{border:1px solid rgba(255,255,255,.26);color:#eef3f8;background:rgba(6,8,12,.42);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
  .btn.ghost:hover{border-color:rgba(110,231,255,.55)}
  .hero-meta{margin-top:24px;font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.66);text-shadow:0 1px 12px rgba(0,0,0,.7)}
  .hero-meta span+span::before{content:"·";margin:0 12px;color:rgba(255,255,255,.34)}
  .scroll-hint{position:absolute;left:50%;bottom:24px;transform:translateX(-50%);z-index:2;display:flex;flex-direction:column;align-items:center;gap:8px;color:rgba(255,255,255,.62);font-family:var(--mono);font-size:10px;letter-spacing:.24em;text-transform:uppercase}
  .scroll-hint svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.6;animation:hint 2.4s ease-in-out infinite}
  @keyframes hint{0%,100%{transform:translateY(0);opacity:.45}50%{transform:translateY(5px);opacity:1}}
  @media(max-width:760px){.hero{padding:104px 0 96px;min-height:94vh}.scroll-hint{display:none}}
  @media(max-height:1000px) and (min-width:761px){
    .hero{padding:96px 0 76px}
    .hero h1 .slogan{margin-top:0}
    .hero{--hz:clamp(54px,10.2vw,146px)}
    .hero .lead{margin-top:22px;font-size:clamp(15px,1.7vw,18px)}
    .hero .closer{margin-top:26px;font-size:clamp(19px,2.6vw,28px)}
    .actions{margin-top:28px}
    .hero-meta{margin-top:16px}
  }
  @media(prefers-reduced-motion:reduce){.scroll-hint svg{animation:none}}

  /* the tv */
  .tv{position:relative;margin:clamp(80px,12vh,140px) auto 0;max-width:1040px}
  .tv-stage{position:relative}
  .tv .tvmock{position:relative;z-index:1}
  .screen{position:relative;border-radius:18px;overflow:hidden;border:1px solid rgba(255,255,255,.14);box-shadow:0 40px 120px rgba(0,0,0,.75),0 0 0 1px rgba(0,0,0,.6) inset;background:#000}
  .screen img{display:block;width:100%;height:auto}
  .screen::after{content:"";position:absolute;inset:0;border-radius:18px;background:linear-gradient(180deg,rgba(255,255,255,.10),transparent 18%,transparent 82%,rgba(0,0,0,.35));pointer-events:none}
  .tv-note{margin:18px 0 0;font-size:15px;color:var(--faint);text-align:center}

  /* off-screen sections skip layout/paint entirely - big win on phones */
  #why,#features,#devices,#install,#faq,footer{content-visibility:auto;contain-intrinsic-size:auto 900px}

  /* stats */
  .stats{margin:clamp(36px,5vh,64px) 0 0;border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);display:grid;grid-template-columns:repeat(4,1fr)}
  .stat{padding:34px 22px;text-align:center;border-left:1px solid var(--line-soft)}
  .stat:first-child{border-left:0}
  .stat svg{width:24px;height:24px;stroke:rgba(110,231,255,.7);fill:none;stroke-width:1.5;margin-bottom:14px}
  .stat b{display:block;font-family:var(--mono);font-size:32px;line-height:1.1;letter-spacing:-.01em;color:#f2f8fb}
  .stat span{display:block;margin-top:10px;font-size:15.5px;color:#a8b1bd;letter-spacing:.02em}
  @media(max-width:700px){.stats{grid-template-columns:repeat(2,1fr)}.stat:nth-child(3){border-left:0}.stat:nth-child(n+3){border-top:1px solid var(--line-soft)}}

  section{padding:clamp(130px,18vh,210px) 0 0}
  .section-far{padding-top:clamp(200px,28vh,320px)}
  .section-gap{padding-top:clamp(170px,23vh,270px)}
  #why{padding-top:clamp(96px,13vh,160px)}
  #features{padding-top:clamp(96px,13vh,160px)}
  #features .rows{margin-top:64px}
  .eyebrow{font-family:var(--mono);font-size:11.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--cyan);opacity:.85}
  h2{margin:16px 0 0;font-size:clamp(34px,5vw,58px);line-height:1.12;letter-spacing:-.035em;font-weight:700;max-width:760px}
  .section-sub{margin:20px 0 0;color:var(--sub);max-width:780px;font-size:clamp(17px,1.8vw,20px);line-height:1.75}

  /* compare */
  .compare{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,9fr);gap:20px;margin-top:56px;align-items:start}
  /* AFTER panel: each line fills exactly one row - type scales with panel width */
  .panel.good{container-type:inline-size}
  .panel.good li{white-space:nowrap;font-size:calc((100cqw - 29px)/29.2);margin-bottom:16px}
  html[lang="en"] .panel.now li{font-size:14px}
  html[lang="en"] .panel.good li{font-size:calc((100cqw - 29px)/35.5);letter-spacing:-.03em}
  @media(max-width:760px){.compare{grid-template-columns:1fr}}
  .panel{position:relative;border:1px solid var(--line-soft);border-radius:var(--radius);padding:32px 30px;background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.012))}
  .panel.now{border-color:rgba(255,255,255,.16)}
  .panel.good{border:1.5px solid rgba(110,231,255,.62);background:linear-gradient(180deg,rgba(110,231,255,.075),rgba(255,255,255,.012));box-shadow:0 0 0 1px rgba(110,231,255,.12),0 0 28px rgba(110,231,255,.14),inset 0 1px 0 rgba(140,235,255,.18)}
  .panel h3{margin:0 0 4px;font-size:20px;font-weight:650;letter-spacing:-.01em}
  .panel .tag{font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--faint)}
  .panel.good .tag{color:rgba(110,231,255,.85)}
  .panel ul{list-style:none;margin:20px 0 0;padding:0}
  .panel li{position:relative;padding-left:29px;margin-bottom:14px;font-size:17.5px;color:#c8d0da;line-height:1.6}
  .panel li::before{content:"";position:absolute;left:0;top:2px;width:16px;height:16px;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236c747e' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M7 7l10 10M17 7L7 17'/%3E%3C/svg%3E");
    background-repeat:no-repeat;background-size:16px 16px}
  .panel.good li::before{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236ee7ff' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12.5l4.5 4.5L19 7'/%3E%3C/svg%3E")}
  .panel .rows-m{display:none}
  .panel.good li{color:#e6edf4}

  /* showcase rows */
  .rows{margin-top:80px;display:flex;flex-direction:column;gap:clamp(96px,14vh,170px)}
  .row{display:grid;grid-template-columns:5fr 7fr;gap:clamp(34px,5vw,76px);align-items:center}
  .row.flip .row-media{order:-1}
  .row h3{margin:0;font-size:clamp(28px,3.6vw,44px);line-height:1.15;letter-spacing:-.032em;font-weight:700}
  .row p{margin:18px 0 0;color:var(--sub);font-size:17.5px;line-height:1.8;max-width:460px}
  .row .row-index{font-family:var(--mono);font-size:12px;letter-spacing:.2em;text-transform:uppercase;color:var(--faint);display:flex;align-items:center;gap:9px;margin-bottom:16px}
  .row .row-index svg{width:15px;height:15px;stroke:rgba(110,231,255,.8);fill:none;stroke-width:1.6;flex:none}
  .row-media{border-radius:var(--radius);overflow:hidden;border:1px solid rgba(255,255,255,.1);box-shadow:0 30px 90px rgba(0,0,0,.55)}
  .row-media img{display:block;width:100%;height:auto;transform:scale(1.045);transition:transform 1.4s cubic-bezier(.2,.7,.2,1)}
  .row.in .row-media img{transform:scale(1)}
  @media(max-width:860px){.row{grid-template-columns:1fr;gap:26px}.row.flip .row-media{order:0}.row p{max-width:none}}

  /* statement */
  .statement{margin-top:clamp(96px,14vh,170px);text-align:center}
.section-far>.statement{margin-top:clamp(44px,5.6vh,72px)}
  .statement h3{margin:0;font-size:clamp(30px,4.6vw,54px);line-height:1.15;letter-spacing:-.035em;font-weight:700}
  .statement p{margin:18px auto 0;color:var(--sub);max-width:560px;font-size:17.5px;line-height:1.8}

  /* gallery */
  .gallery-wide{margin-top:64px}
  .gallery-wide figure{margin:0}
  .gallery-wide img{display:block;width:100%;height:auto;border-radius:var(--radius);border:1px solid var(--line-soft);box-shadow:0 24px 70px rgba(0,0,0,.55)}
  .gallery-wide figcaption{margin-top:14px;font-size:15px;color:var(--faint);text-align:center}

  /* languages */
  .langs{margin-top:52px}
  .lang-row{display:flex;gap:26px;justify-content:center;align-items:center}
  .lang-row+.lang-row{margin-top:20px}
  @media(min-width:761px){
    .langs{padding:14px 0 6px}
    .langs span{animation:lang-float var(--fd,7.2s) ease-in-out var(--fdel,0s) infinite alternate}
    .langs span:nth-child(2n){--fd:8.6s;--fdel:-2.4s}
    .langs span:nth-child(3n){--fd:6.3s;--fdel:-4.2s}
    .langs span:nth-child(5n){--fd:9.4s;--fdel:-1.3s}
    .langs span:nth-child(7n){--fd:7.8s;--fdel:-5.5s}
    @keyframes lang-float{from{translate:0 -13px}to{translate:0 15px}}
  }
  .langs span{position:relative;border:1px solid var(--line-soft);border-radius:999px;padding:18px 34px;font-size:24px;color:#d6dde5;background:rgba(255,255,255,.028);transition:color .25s ease,border-color .25s ease,box-shadow .3s ease,background .25s ease;overflow:hidden}
  .glow{position:relative}
  /* glow pills stay touch-glowy but never turn into selectable text on long-press */
  .langs span,.chips .chip{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}
  .glow::before,.langs span::before{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;background:radial-gradient(140px circle at var(--mx,50%) var(--my,50%),rgba(190,235,255,.30),rgba(120,170,255,.14) 44%,transparent 72%),radial-gradient(240px circle at var(--lx,50%) var(--ly,50%),rgba(130,190,255,.16),transparent 76%);opacity:0;transition:opacity .25s ease}
  .glow:hover{box-shadow:0 0 0 1px rgba(170,225,255,.20),0 16px 46px rgba(80,170,255,.18),inset 0 1px 0 rgba(255,255,255,.16)}
  .langs span{transition:color .25s ease,border-color .25s ease,box-shadow .3s ease,background .25s ease,transform .35s cubic-bezier(.2,.7,.2,1)}
  @media(hover:hover){
    .lang-row span:hover{position:relative;z-index:5;will-change:transform;color:#fff;border-color:rgba(190,235,255,.85);background:rgba(200,235,255,.10);box-shadow:0 0 0 1px rgba(190,235,255,.4),0 14px 44px rgba(80,170,255,.34),0 0 26px rgba(140,220,255,.28),inset 0 1px 0 rgba(255,255,255,.26);transform:scale(1.22)}
    .lang-row span:has(+ span:hover){transform:scale(.92) translateX(-9px)}
    .lang-row span:hover + span{transform:scale(.92) translateX(9px)}}
  .glow:hover::before,.langs span:hover::before{opacity:1}
  @media(hover:none){
    .langs span{transition:transform .28s cubic-bezier(.2,.7,.2,1),box-shadow .28s ease,border-color .28s ease}
    .langs span.t-hot{color:#fff;border-color:rgba(190,235,255,.85);background:rgba(200,235,255,.10);box-shadow:0 0 0 1px rgba(190,235,255,.4),0 12px 36px rgba(80,170,255,.3);transform:scale(1.18)}
    .langs span.t-near-l{transform:translateX(-7px) scale(.93)}
    .langs span.t-near-r{transform:translateX(7px) scale(.93)}
    .langs span.t-hot::before{opacity:1}
  }

  /* install */
  .steps{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:52px}
  @media(max-width:860px){.steps{grid-template-columns:1fr}}
  .term,.step-copy{border:1px solid var(--line-soft);border-radius:16px;overflow:hidden;display:flex;flex-direction:column;
    background:linear-gradient(180deg,rgba(255,255,255,.032),rgba(10,12,17,.55));transition:border-color .25s ease}
  .term:hover,.step-copy:hover{border-color:rgba(110,231,255,.26)}
  .term-bar{display:flex;align-items:center;gap:7px;padding:12px 15px;border-bottom:1px solid var(--line-soft);background:rgba(255,255,255,.022)}
  .term-bar i{width:9px;height:9px;border-radius:50%;background:#2b3138}
  .term-bar i:nth-child(1){background:#3a2a2f}
  .term-bar span{margin-left:8px;font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--faint);text-transform:uppercase}
  .term-h{margin:0;padding:16px 20px 0;font-size:16.5px;font-weight:650;letter-spacing:-.01em}
.term-h+pre{padding-top:10px}
.term pre{margin:0;padding:20px;font-family:var(--mono);font-size:12.8px;line-height:1.75;color:#c8e6f2;overflow-x:auto;white-space:pre}
  .term pre .c{color:#5f6a76}
  .step-copy-body{padding:20px 22px 24px}
  .step-copy h3{margin:0 0 9px;font-size:17px;font-weight:650;display:flex;align-items:center;gap:9px}
  .step-copy h3 svg{width:19px;height:19px;stroke:rgba(110,231,255,.85);fill:none;stroke-width:1.6;flex:none}
  .step-copy p{margin:0;color:var(--sub);font-size:15.5px;line-height:1.7}
  .step-copy code{font-family:var(--mono);font-size:12.8px;background:rgba(255,255,255,.06);padding:2px 6px;border-radius:5px;color:#d5ecf7}

  /* faq */
  .faq{margin-top:44px;border-top:1px solid var(--line-soft)}
  details{border-bottom:1px solid var(--line-soft);padding:24px 0}
  summary{cursor:pointer;font-size:17px;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:20px;align-items:center;letter-spacing:-.01em}
  summary::-webkit-details-marker{display:none}
  summary::after{content:"+";font-family:var(--mono);color:var(--faint);font-size:18px;transition:transform .2s}
  details[open] summary::after{content:"–";color:var(--cyan)}
  details p{margin:13px 0 0;color:var(--sub);font-size:15.5px;max-width:760px}
  details a{color:#bfe9fb;border-bottom:1px solid rgba(191,233,251,.35)}

  footer{margin-top:clamp(130px,18vh,200px);border-top:1px solid var(--line-soft);padding:44px 0 68px;color:var(--faint);font-size:13.5px}
  footer .row{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
  footer a{color:#9fb0bd}
  footer a:hover{color:#dff2fb}

  .reveal{opacity:0;transform:translateY(26px)}
  .reveal.in{opacity:1;transform:none;transition:opacity .9s cubic-bezier(.2,.7,.2,1),transform .9s cubic-bezier(.2,.7,.2,1)}
  @media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none} .row-media img{transform:none} html{scroll-behavior:auto}}

  /* ---- added: language switch, tested devices, privacy ---- */
  .lang-switch{display:flex;align-items:center;gap:2px;border:1px solid var(--line-soft);border-radius:999px;padding:3px;margin-left:4px}
  .lang-switch a{font-size:12.5px;padding:5px 11px;border-radius:999px;color:var(--faint);letter-spacing:.02em;border:0}
  .lang-switch a[aria-current="true"]{background:rgba(255,255,255,.085);color:#eaf2f8}
  .lang-switch a:hover{color:#fff;background:rgba(255,255,255,.05)}

  .dev-groups{display:flex;flex-direction:column;margin-top:44px}
  .dev-row{display:grid;grid-template-columns:172px 1fr;gap:18px;align-items:start;padding:11px 0;border-top:1px solid var(--line-soft)}
  .dev-row:last-child{border-bottom:1px solid var(--line-soft)}
  .dev-row h4{margin:4px 0 0;font-size:15.5px;font-weight:650;color:#dbe3ea;letter-spacing:-.01em}
  .chips{display:flex;flex-wrap:wrap;gap:9px}
  .chip{font-size:15px;padding:9px 17px;border-radius:999px;border:1px solid rgba(255,255,255,.14);color:#dbe3ea;background:linear-gradient(180deg,rgba(255,255,255,.10),rgba(255,255,255,.03));box-shadow:inset 0 1px 0 rgba(255,255,255,.12),0 4px 14px rgba(0,0,0,.35);letter-spacing:.08em;font-family:var(--mono)}
  .chip:hover{color:#fff;border-color:rgba(170,225,255,.45);background:rgba(255,255,255,.06)}
  @media(max-width:760px){.dev-row{grid-template-columns:1fr;gap:12px}}

  .privacy{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:44px}
  .pcard{border:1px solid var(--line-soft);border-radius:16px;padding:22px 24px;
    background:linear-gradient(180deg,rgba(255,255,255,.032),rgba(10,12,17,.55))}
  .pcard b{display:block;font-size:16px;font-weight:650;margin-bottom:8px;color:#e6edf4;letter-spacing:-.01em}
  .pcard p{margin:0;font-size:15px;line-height:1.75;color:var(--sub)}
  @media(max-width:760px){.privacy{grid-template-columns:1fr}}

  .dl-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
  .dl-meta span{font-family:var(--mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--faint);
    border:1px solid var(--line-soft);border-radius:999px;padding:7px 13px}

  /* the language switch survives the narrow header, where the section links don't */
  @media(max-width:760px){
    nav{gap:14px}
    nav .lang-switch a{display:block;padding:5px 9px}
  }


  /* ---- the TV screen: every measure below is the app's own. Home lays out on a 960x540 dp
     canvas (1 dp = 2 px here), so 1 dp = 0.1042 cqw and the numbers are copied, not guessed. ---- */
  .tvmock{position:relative;aspect-ratio:16/9;border-radius:var(--radius);overflow:hidden;container-type:inline-size;
    border:1px solid rgba(255,255,255,.1);box-shadow:0 30px 90px rgba(0,0,0,.6);background:#0a0c10}
  .tvmock-wall{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}
  .tvmock::after{content:"";position:absolute;inset:0;pointer-events:none;
    background:linear-gradient(180deg,rgba(0,0,0,.2),rgba(0,0,0,0) 17%,rgba(0,0,0,0) 76%,rgba(0,0,0,.14))}
  .tm-ui{position:absolute;inset:0}

  /* status line: 17 sp detail, 16 dp glyphs, 12 dp between items, the pill 34 dp tall */
  .tm-status{position:absolute;top:2.92cqw;right:5.7cqw;display:flex;align-items:center;gap:1.25cqw;
    color:#fff;font-size:1.77cqw;font-family:'Inter TV','MiSans TV',sans-serif;
    text-shadow:0 .21cqw .63cqw rgba(0,0,0,.5)}
  .tm-item{display:flex;align-items:center;gap:.55cqw;white-space:nowrap}
  .tm-item>svg{width:1.67cqw;height:1.67cqw;display:block}
  .tm-last{margin-right:.4cqw}
  .tm-pill{display:flex;align-items:center;gap:1.04cqw;height:3.54cqw;padding:0}
  .tm-pill>svg{width:1.77cqw;height:1.77cqw;display:block}

  /* the clock: ModuleNumber 72 sp, Inter Display (opsz 32), W400, tracking -2 sp, tabular */
  .tm-clock{position:absolute;left:6cqw;top:3.4cqw}
  .tm-date{font-size:1.77cqw;color:#fff;font-family:'Inter TV','MiSans TV',sans-serif;letter-spacing:0;
    text-shadow:0 .21cqw .94cqw rgba(0,0,0,.28)}
  .tm-lunar{font-weight:500}
  /* GlassTime: white at 80%, shadow (0,3) blur 26 at 34% — the digits show the photo through */
  .tm-time{font-family:'Inter TV',sans-serif;font-size:7.5cqw;font-weight:400;line-height:.94;letter-spacing:-.028em;
    color:rgba(255,255,255,.8);text-shadow:0 .31cqw 1.35cqw rgba(0,0,0,.34);margin-top:.58cqw;
    font-variant-numeric:tabular-nums;font-variation-settings:'opsz' 32}

  /* the plate: GridMargin 56, gap 28, tile 147.2x82.8 (16:9), PlatePadH 26 / PadV 20 / Corner 32,
     PlateMarginBottom 30 — all dp, straight from HomeScreen.kt and HomeChrome.kt */
  .tm-shelf{position:absolute;left:50%;transform:translateX(-50%);bottom:3.13cqw;width:93.96cqw;
    background:rgba(255,255,255,.2);border-radius:3.33cqw;padding:2.08cqw 2.71cqw;display:flex;gap:2.71cqw;
    backdrop-filter:blur(26px) saturate(1.2);-webkit-backdrop-filter:blur(26px) saturate(1.2);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.26),0 18px 50px rgba(0,0,0,.34)}
  .tm-tile{flex:1;aspect-ratio:16/9;border-radius:1.5cqw;position:relative;overflow:hidden;background:transparent;
    box-shadow:0 .28cqw .9cqw rgba(0,0,0,.2)}
  .tm-tile img{position:absolute;inset:-1px;width:calc(100% + 2px);height:calc(100% + 2px);object-fit:cover;display:block}

  @media(max-width:720px){.tm-status{font-size:2.4cqw;gap:1.7cqw}.tm-date{font-size:2.4cqw}.tm-time{font-size:9.6cqw}}

  /* the English hero shares the Chinese vertical rhythm — same rhythm, smaller glyphs */
  html[lang="en"] .hero .lead{max-width:720px}
  @media(max-width:760px){html[lang="en"] .hero h1{height:calc(var(--hz)*2.34)}}

@font-face{
  font-family:'NotoKR TV';
  src:url(noto-kr.woff2) format('woff2');
  font-weight:400;font-style:normal;font-display:swap;
}

/* ---- feature-section TV mockups: same dp sheet as the hero (1 dp = 0.1042 cqw) ---- */
/* 01 · weather: the status line alone, over the wallpaper */
.tv-weather .tvmock-wall{filter:brightness(.55) saturate(1.02) blur(2.5px);transform:scale(1.06)}
.tv-weather .tm-status .tm-item{text-shadow:0 1px 3px rgba(0,0,0,.65),0 2px 14px rgba(0,0,0,.45)}
.tv-weather .tm-status .tm-item>svg{filter:drop-shadow(0 1px 3px rgba(0,0,0,.6))}
.tv-weather .tm-status{top:50%;transform:translate(-50%,-50%);right:auto;left:50%;font-size:4.43cqw;gap:3.13cqw}
.tv-weather .tm-item{gap:1.38cqw}
.tv-weather .tm-item>svg{width:4.18cqw;height:4.18cqw}
.tv-weather .tm-pill{gap:2.6cqw}
.tv-weather .tm-pill>svg{width:4.43cqw;height:4.43cqw}

/* 03 · screensaver: home with a static clock, Korean date */
.tv-saver .tm-time,.tv-grid .tm-time{text-shadow:0 .31cqw 1.35cqw rgba(0,0,0,.34)}

/* 04 · all-apps grid: GridMargin 56, gridGap 28, tile 147.2x82.8 (16:9),
   rows start 72 dp, pitch 133 dp (RowNameRoom 50) — HomeScreen.kt */
.tv-apps .tvmock-wall{filter:blur(2.4cqw) brightness(.82);transform:scale(1.1)}
.tg-row{position:absolute;left:5.83cqw;right:5.83cqw;display:flex;gap:2.92cqw}
.tg-row.r1{top:7.5cqw}.tg-row.r2{top:21.35cqw}.tg-row.r3{top:35.2cqw}.tg-row.r4{top:49.06cqw}
.tg-cell{flex:1;aspect-ratio:16/9;border-radius:1.5cqw;overflow:hidden;position:relative;
  box-shadow:0 .28cqw .9cqw rgba(0,0,0,.2);background:transparent}
.tg-cell img{position:absolute;inset:-1px;width:calc(100% + 2px);height:calc(100% + 2px);object-fit:cover;display:block}
.tg-focus{outline:.21cqw solid #fff;outline-offset:.1cqw;transform:scale(1.06);z-index:1}
.tg-name{position:absolute;left:0;right:0;top:8.9cqw;text-align:center;color:#fff;font-size:1.35cqw;
  font-family:'Inter TV','MiSans TV','NotoKR TV',sans-serif;text-shadow:0 .21cqw .63cqw rgba(0,0,0,.5)}
.tg-row.r2{top:20.6cqw}  /* the focused row lifts a little for its name */

/* 05 · settings sheet: glass panel from 27% down, sidebar, wallpaper thumbs, QR */
.tv-set{background:#0a121c}
.tv-set .tvmock-wall{filter:brightness(.9) saturate(1.05)}
{LEFT}.ts-panel{position:absolute;left:0;right:0;bottom:0;top:18.75cqw;
  background:rgba(20,27,38,.52);border-radius:2cqw 2cqw 0 0;
  backdrop-filter:blur(2.6cqw);-webkit-backdrop-filter:blur(2.6cqw)}
.ts-side{position:absolute;left:3.23cqw;top:2.68cqw;width:19.64cqw}
.ts-item{display:flex;align-items:center;gap:1cqw;height:4.55cqw;color:rgba(255,255,255,.75);
  font-size:1.5cqw;font-family:'Inter TV','MiSans TV','NotoKR TV',sans-serif}
.ts-item svg{width:1.46cqw;height:1.46cqw;flex:none}
.ts-on{background:#fff;color:#14181f;border-radius:.83cqw;padding:0 1.25cqw;font-weight:500}
.ts-title{position:absolute;left:23.8cqw;top:2.45cqw;color:#fff;font-size:2.3cqw;font-weight:400;
  font-family:'Inter TV','MiSans TV','NotoKR TV',sans-serif}
.ts-thumbs{position:absolute;left:25.3cqw;top:7.39cqw;display:flex;gap:1.86cqw;align-items:flex-start}
.ts-thumb{margin:0;width:17.57cqw}
.ts-thumb.sm{width:11.14cqw}
.ts-thumb .ph{width:100%;aspect-ratio:16/9;border-radius:1cqw;overflow:hidden;position:relative;background:#233}
.ts-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.ts-thumb .play{position:absolute;left:.9cqw;bottom:.9cqw;width:1.88cqw;height:1.88cqw;border-radius:50%;
  background:rgba(255,255,255,.85);display:flex;align-items:center;justify-content:center}
.ts-thumb .play svg{width:1cqw;height:1cqw;margin-left:.1cqw}
 .ts-thumb figcaption{margin-top:1.79cqw;color:rgba(255,255,255,.72);font-size:1.35cqw;
  font-family:'Inter TV','MiSans TV','NotoKR TV',sans-serif}
.ts-qr{width:18cqw;height:18cqw;margin:0 auto;border-radius:1.25cqw;overflow:hidden;background:#fff}
.ts-qr img{width:100%;height:100%;object-fit:contain;display:block}
.ts-phone{position:absolute;left:77.7cqw;top:3.18cqw;width:18.75cqw;text-align:center}
.ts-ptitle{margin-top:1.46cqw;font-size:1.56cqw;color:#fff;font-weight:500;font-family:'Inter TV','MiSans TV',sans-serif}
.ts-pbody{margin-top:.42cqw;font-size:1.35cqw;color:rgba(255,255,255,.62);line-height:1.5;font-family:'Inter TV','MiSans TV',sans-serif}
.ts-purl{margin-top:.63cqw;font-size:1.04cqw;color:rgba(255,255,255,.85);word-break:break-all;font-family:'Inter TV','MiSans TV',sans-serif}
.ts-qrtext b{color:#fff;font-weight:600}
.ts-qrtext .lnk{color:#7fb4ff;word-break:break-all}
.ts-ver{position:absolute;left:0;right:0;bottom:1.5cqw;text-align:center;color:rgba(255,255,255,.38);
  font-size:1.21cqw;font-family:'Inter TV','MiSans TV','NotoKR TV',sans-serif}

body{font-family:'Inter TV','MiSans TV','NotoKR TV',-apple-system,'PingFang SC','Microsoft YaHei',sans-serif}

/* the old picture rule (.row-media img) out-specifies .tvmock-wall — restore full-bleed */
.row-media .tvmock-wall{width:100%;height:100%;object-fit:cover;border-radius:0}

/* device chips share the language pills' liquid-glow */
.chips .chip{position:relative;overflow:hidden}
.chips .chip::before{content:"";position:absolute;inset:0;border-radius:inherit;pointer-events:none;
  background:radial-gradient(120px circle at var(--mx,50%) var(--my,50%),rgba(190,235,255,.30),rgba(120,170,255,.14) 44%,transparent 72%),
             radial-gradient(200px circle at var(--lx,50%) var(--ly,50%),rgba(130,190,255,.16),transparent 76%);
  opacity:0;transition:opacity .25s ease}
.chips .chip:hover::before{opacity:1}
.chips .chip{transition:transform .35s cubic-bezier(.2,.7,.2,1),color .2s,border-color .2s,box-shadow .3s}
@media(hover:hover){
  .chips:hover .chip{transform:scale(.955)}
  .chips .chip:hover{color:#fff;border-color:rgba(170,225,255,.6);
    box-shadow:0 0 0 1px rgba(170,225,255,.22),0 12px 34px rgba(80,170,255,.22),inset 0 1px 0 rgba(255,255,255,.22);
    transform:scale(1.14)}
  .chips .chip:has(+ .chip:hover){transform:scale(.955) translateX(-5px)}
  .chips .chip:hover + .chip{transform:scale(.955) translateX(5px)}}

/* tile imgs must not inherit card-level radii (.gallery-wide img etc. made dock tiles pill-shaped) */
.tm-tile img,.tg-cell img{border-radius:0}


.hero .lead .lead-alt{display:none}

/* ---- mobile layout fixes (<=760px only; desktop untouched) ---- */
@media(max-width:760px){
  /* page canvas — wider content, smaller header */
  .wrap{padding:0 16px}
  .hero-inner{padding:0 18px}
  header .wrap{height:54px}
  .brand img{height:24px;width:auto}
  nav{gap:8px}
  nav a,.lang-switch a,nav a.cta{white-space:nowrap}
  nav a.cta{display:none}
  .lang-switch{padding:2px;margin-left:0}
  .lang-switch a{padding:5px 9px;font-size:12px}

  /* hero — compact; buttons one row, minimal text */
  .hero{min-height:auto;min-height:0;padding:40px 0 44px}
  .scroll-hint{display:none}
  /* CN title one line (global) — mobile just bumps the size a touch */
  /* fill the available width exactly; adapts on narrow phones, never wraps */
  /* CN hero: tighter tracking + larger type so the line feels intentionally snug, edge to edge */
  html:not([lang="en"]) .hero h1 .slogan{font-size:min(calc((100vw - 28px)/5.76),64px);letter-spacing:-.1em}
  html:not([lang="en"]) .hero h1 .slogan span{letter-spacing:-.1em;text-indent:0}
  html:not([lang="en"]) .hero h1 .slogan span+span{margin-left:.22em;letter-spacing:-.1em}
  /* EN hero: exactly two lines on every phone width - the type scales down instead of wrapping */
  html[lang="en"] .hero h1 .slogan.en{white-space:nowrap;font-size:min(calc((100vw - 36px)/6.95),56px)}
  html:not([lang="en"]) .hero .lead{margin-top:16px}
  html:not([lang="en"]) .hero .lead .lead-main{display:none}
  html:not([lang="en"]) .hero .lead .lead-alt{display:inline}
  .hero .lead{margin-top:12px;text-wrap:initial;font-size:14px;line-height:1.55;padding:0 4px;min-height:4.65em}
  .hero .lead br{display:none}
  .hero .lead .lead-alt br{display:inline}
  .hero .closer{margin-top:12px;font-size:16px}
  .actions{flex-wrap:nowrap;gap:10px;margin-top:18px}
  .actions .btn{min-width:0;max-width:100%;height:42px;padding:0 14px;font-size:13.5px;gap:6px}
  .actions .btn .btn-name{display:none}
  .actions .btn.primary{flex:1.7 1 0;padding-left:16px;padding-right:16px}
  .actions .btn.ghost{flex:1.3 1 0;padding-left:10px;padding-right:10px}
  .actions .btn.primary .btn-logo{width:16px;height:16px}
  .actions .btn.primary svg{width:15px;height:15px}
  /* CN primary keeps the brand name in the logo typeface; EN stays text-only */
  html:not([lang="en"]) .actions .btn .btn-name{display:inline;font-family:'MiSans Bold TV','Inter Var',sans-serif;font-weight:400;font-size:14px;letter-spacing:.06em}
  .hero-meta{margin-top:12px;font-size:10px;letter-spacing:.06em}
  .hero-meta span+span::before{margin:0 6px}

  /* tv mockup + stats — one row of four */
  .tv{margin:20px auto 0}
  .tv-note{margin:8px 0 0;font-size:12.5px}
  .stats{margin:14px 0 0;grid-template-columns:repeat(4,1fr)}
  .stat{padding:12px 4px;border-left:1px solid var(--line-soft)}
  .stat:first-child{border-left:0}
  .stat:nth-child(n+3){border-top:0}
  .stat svg{width:16px;height:16px;margin-bottom:6px}
  .stat b{font-size:16px}
  .stat span{margin-top:4px;font-size:10px}

  /* section rhythm — big desktop paddings gone */
  section{padding:44px 0 0}
  #why{padding-top:34px}
  #features{padding-top:34px}
  .section-gap{padding-top:44px}
  .section-far{padding-top:48px}

  /* headings — one size smaller */
  h2{margin-top:10px;font-size:clamp(20px,5.4vw,24px);line-height:1.22}
  .eyebrow{font-size:9.5px}
  .section-sub{margin-top:8px;font-size:14px;line-height:1.55}

  /* before/after — side-by-side on mobile */
  .compare{margin-top:18px;gap:10px;grid-template-columns:minmax(0,4fr) minmax(0,5.6fr)}
  .panel{padding:14px 12px}
  .panel h3{font-size:14px}
  .panel .tag{font-size:9.5px}
  .panel ul{margin-top:9px}
  .panel li{padding-left:15px;margin-bottom:7px;font-size:11px;line-height:1.45}
  html[lang="en"] .panel.now li{font-size:12px}
  .panel.good li{white-space:normal;font-size:12px;margin-bottom:7px}
  html[lang="en"] .panel.good li{font-size:14px;letter-spacing:0}
  .panel .rows-d{display:none}
  .panel .rows-m{display:block}
  .panel li::before{width:11px;height:11px;top:2px;background-size:11px 11px}

  /* feature rows */
  .rows{margin-top:24px;gap:30px}
  #features .rows{margin-top:24px}
  .row{gap:12px}
  .row h3{font-size:clamp(17px,4.8vw,19px)}
  .row p{margin-top:7px;font-size:14px;line-height:1.55}
  .row-index{margin-bottom:7px}
  .row .row-index svg{width:12px;height:12px}
  /* 01 weather mockup + 02 wallpaper stack: slightly shorter, crop top/bottom */
  .row .tvmock.tv-weather{aspect-ratio:2/1}
  .row .row-media picture img{aspect-ratio:2/1;object-fit:cover}

  /* in use + languages */
  .gallery-wide{margin-top:16px}
  .gallery-wide figcaption{margin-top:7px;font-size:12.5px}
  .statement h3{font-size:clamp(18px,5vw,21px)}
  .statement p{margin-top:7px;font-size:14px}
  .langs{display:flex;flex-wrap:wrap;gap:5px;margin-top:14px;justify-content:center}
  .langs .lang-row{display:contents}
  .langs span{padding:6px 11px;font-size:12.5px}

  /* devices — single flowing stream: brand labels + chips all inline,
     short brands share the same line; content unchanged */
  .dev-groups{display:flex;flex-direction:row;flex-wrap:wrap;justify-content:flex-start;align-items:center;gap:6px;margin-top:14px}
  .dev-row,.dev-row .chips{display:contents}
  .dev-row h4{margin:0;font-size:11.5px;color:#8fa0ad;flex:0 0 auto;letter-spacing:.02em}
  .dev-row+.dev-row h4::before{content:"·";margin:0 6px 0 0;color:#42505c}
  .chips{gap:4px}
  .chip{font-size:10.5px;padding:3px 8px;letter-spacing:.03em}

  /* install */
  .steps{margin-top:12px;gap:8px}
  .term-bar{padding:7px 11px}
  .term-h{padding:9px 12px 0;font-size:13.5px}
  .term pre{font-size:11px;padding:9px 12px;line-height:1.55;white-space:pre-wrap;overflow-wrap:anywhere}
  .step-copy-body{padding:10px 12px 12px}
  .step-copy h3{font-size:13.5px;margin-bottom:5px}
  .step-copy h3 svg{width:14px;height:14px}
  .step-copy p{font-size:13px}
  .dl-meta{gap:5px;margin-top:10px}
  .dl-meta span{font-size:10px}

  /* faq + footer */
  .faq{margin-top:12px}
  details{padding:10px 0}
  summary{font-size:14px;gap:10px}
  summary::after{font-size:14px}
  details p{margin-top:6px;font-size:13px;line-height:1.55}
  footer{margin-top:40px;padding:20px 0 36px;font-size:12px}
}