@font-face {
  font-family: "SendSize CJK";
  src: url("SendSize-CJK.otf") format("opentype");
  font-display: swap;
  font-weight: 100 900;
}

:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "SendSize CJK", "SF Pro Text", "PingFang SC", sans-serif;
  background: #070b18;
  color: #f6f8ff;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 88% 4%, rgba(255, 116, 86, .28), transparent 34rem),
    radial-gradient(circle at 8% 72%, rgba(44, 116, 215, .25), transparent 38rem),
    linear-gradient(145deg, #070b18, #171545 48%, #06354c);
}

a { color: inherit; }

.shell {
  width: min(880px, calc(100% - 36px));
  margin: 0 auto;
  padding: 30px 0 72px;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 54px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: 20px;
  font-weight: 720;
}

.mark {
  position: relative;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255, 255, 255, .45);
  border-radius: 12px;
  background: linear-gradient(135deg, #5449c4, #0b7495 62%, #ff8057);
  box-shadow: 0 10px 28px rgba(10, 16, 44, .35);
}

.mark::after {
  content: "";
  position: absolute;
  left: 14px;
  top: 11px;
  width: 0;
  height: 0;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  border-left: 12px solid white;
}

.language {
  display: flex;
  padding: 3px;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 999px;
  background: rgba(255, 255, 255, .08);
}

.language button {
  border: 0;
  border-radius: 999px;
  padding: 8px 12px;
  color: rgba(255, 255, 255, .72);
  background: transparent;
  font: inherit;
  cursor: pointer;
}

.language button[aria-pressed="true"] {
  color: #101526;
  background: white;
}

main {
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 34px;
  padding: clamp(28px, 6vw, 64px);
  background: rgba(7, 13, 30, .66);
  box-shadow: 0 36px 90px rgba(0, 0, 0, .28);
  backdrop-filter: blur(28px);
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(38px, 7vw, 66px);
  line-height: 1.05;
  letter-spacing: -.035em;
}

.lede {
  margin: 0 0 46px;
  max-width: 680px;
  color: rgba(239, 243, 255, .72);
  font-size: clamp(17px, 2.4vw, 21px);
  line-height: 1.62;
}

section + section {
  margin-top: 42px;
  padding-top: 42px;
  border-top: 1px solid rgba(255, 255, 255, .12);
}

h2 {
  margin: 0 0 14px;
  font-size: 23px;
  letter-spacing: -.015em;
}

p, li {
  color: rgba(239, 243, 255, .76);
  font-size: 16px;
  line-height: 1.72;
}

ul { margin: 12px 0 0; padding-left: 22px; }

.contact {
  display: inline-flex;
  align-items: center;
  min-height: 50px;
  margin-top: 10px;
  padding: 0 20px;
  border-radius: 999px;
  color: #111626;
  background: white;
  text-decoration: none;
  font-weight: 680;
}

.meta {
  margin-top: 42px;
  color: rgba(239, 243, 255, .48);
  font-size: 13px;
}

[data-locale] { display: none; }
[data-locale].active { display: block; }

footer {
  padding-top: 28px;
  color: rgba(239, 243, 255, .5);
  font-size: 13px;
  text-align: center;
}

@media (max-width: 560px) {
  .shell { width: min(100% - 24px, 880px); padding-top: 18px; }
  header { margin-bottom: 28px; }
  main { border-radius: 26px; }
}

/* Landing page */
.landing {
  overflow-x: hidden;
  background:
    radial-gradient(circle at 75% 4%, rgba(255, 112, 84, .19), transparent 31rem),
    radial-gradient(circle at 5% 38%, rgba(52, 116, 235, .18), transparent 40rem),
    linear-gradient(155deg, #070a17 0%, #111039 48%, #052d41 100%);
}

.landing-shell { width: min(1180px, calc(100% - 48px)); }

.landing header {
  position: relative;
  z-index: 10;
  margin-bottom: 20px;
}

.header-actions,
.site-nav,
.hero-actions,
.site-footer,
.site-footer nav {
  display: flex;
  align-items: center;
}

.header-actions { gap: 24px; }
.site-nav { gap: 22px; }
.site-nav a,
.site-footer a {
  color: rgba(244, 247, 255, .68);
  font-size: 14px;
  font-weight: 620;
  text-decoration: none;
  transition: color .2s ease;
}
.site-nav a:hover,
.site-footer a:hover { color: #fff; }

.landing-main {
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.03fr) minmax(390px, .97fr);
  align-items: center;
  min-height: 700px;
  padding: 72px 0 90px;
}

.hero-copy { position: relative; z-index: 2; }
.eyebrow {
  margin: 0 0 20px;
  color: #8cbaff;
  font-size: 13px;
  font-weight: 760;
  letter-spacing: .11em;
  line-height: 1.4;
  text-transform: uppercase;
}
.hero h1 {
  max-width: 700px;
  margin-bottom: 25px;
  font-size: clamp(62px, 8vw, 102px);
  line-height: .96;
  letter-spacing: -.058em;
}
.hero .lede { max-width: 590px; margin-bottom: 32px; }
.hero-actions { flex-wrap: wrap; gap: 24px; }

.store-badge {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  min-width: 178px;
  min-height: 58px;
  padding: 8px 20px 9px;
  border: 1px solid rgba(255, 255, 255, .55);
  border-radius: 14px;
  color: #fff;
  background: rgba(255, 255, 255, .08);
  box-shadow: inset 0 1px rgba(255, 255, 255, .14);
  font-size: 22px;
  font-weight: 690;
  line-height: 1.08;
}
.store-badge small {
  margin-bottom: 2px;
  color: rgba(255, 255, 255, .7);
  font-size: 10px;
  font-weight: 620;
  letter-spacing: .02em;
}
.text-link {
  color: rgba(255, 255, 255, .84);
  font-size: 15px;
  font-weight: 680;
  text-decoration: none;
}
.trust-line { margin: 27px 0 0; color: rgba(236, 242, 255, .5); font-size: 13px; }

.phone-stage {
  position: relative;
  min-height: 610px;
  display: grid;
  place-items: center;
  perspective: 1200px;
}
.glow { position: absolute; border-radius: 50%; filter: blur(2px); }
.glow-one {
  width: 370px;
  height: 370px;
  background: radial-gradient(circle, rgba(73, 114, 255, .4), rgba(73, 114, 255, 0) 70%);
}
.glow-two {
  right: 4%;
  bottom: 4%;
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(255, 112, 74, .32), rgba(255, 112, 74, 0) 70%);
}
.phone {
  position: relative;
  z-index: 2;
  width: 306px;
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, .52);
  border-radius: 50px;
  background: linear-gradient(145deg, rgba(240, 245, 255, .38), rgba(43, 51, 82, .28));
  box-shadow: 0 50px 100px rgba(0, 0, 0, .52), inset 0 0 0 1px rgba(255, 255, 255, .22);
  transform: rotateY(-7deg) rotateX(2deg) rotateZ(2deg);
}
.phone::before {
  content: "";
  position: absolute;
  z-index: 3;
  top: 17px;
  left: 50%;
  width: 86px;
  height: 25px;
  border-radius: 20px;
  background: #050714;
  transform: translateX(-50%);
}
.phone-screen {
  min-height: 596px;
  padding: 19px 17px 22px;
  overflow: hidden;
  border-radius: 41px;
  background:
    radial-gradient(circle at 95% 1%, rgba(255, 121, 87, .28), transparent 15rem),
    radial-gradient(circle at 0% 62%, rgba(52, 110, 235, .28), transparent 18rem),
    #0a0e23;
}
.phone-status,
.phone-brand,
.quality-row,
.device-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.phone-status { padding: 0 8px 25px; color: rgba(255, 255, 255, .74); font-size: 9px; font-weight: 700; }
.phone-brand { justify-content: flex-start; gap: 8px; margin: 4px 4px 26px; font-size: 16px; font-weight: 750; }
.mini-mark {
  width: 27px;
  height: 27px;
  border-radius: 9px;
  background: linear-gradient(135deg, #6359e2, #1985ab 60%, #ff7e54);
}
.video-card {
  display: grid;
  grid-template-columns: 46px 1fr;
  grid-template-rows: 1fr 1fr;
  column-gap: 12px;
  min-height: 88px;
  padding: 15px;
  border: 1px solid rgba(255, 255, 255, .13);
  border-radius: 21px;
  background: rgba(255, 255, 255, .08);
}
.play-symbol {
  grid-row: 1 / 3;
  width: 46px;
  height: 58px;
  border-radius: 13px;
  background: linear-gradient(160deg, #272654, #145a73);
}
.play-symbol::after {
  content: "▶";
  display: grid;
  place-items: center;
  height: 100%;
  color: #fff;
  font-size: 15px;
}
.video-card span { align-self: end; color: rgba(255, 255, 255, .6); font-size: 9px; }
.video-card strong { align-self: start; font-size: 14px; }
.target-label { margin: 31px 4px 12px; color: rgba(255, 255, 255, .6); font-size: 11px; }
.size-options { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; }
.size-options span {
  display: grid;
  place-items: center;
  min-height: 45px;
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 14px;
  color: rgba(255, 255, 255, .64);
  background: rgba(255, 255, 255, .055);
  font-size: 11px;
  font-weight: 680;
}
.size-options .selected { border-color: rgba(125, 174, 255, .74); color: #fff; background: rgba(65, 121, 230, .3); }
.quality-row { margin: 24px 4px; color: rgba(255, 255, 255, .55); font-size: 10px; }
.quality-row strong { color: #8cc8ff; }
.compress-button {
  display: grid;
  place-items: center;
  min-height: 50px;
  border-radius: 16px;
  color: #101528;
  background: #fff;
  font-size: 12px;
  font-weight: 760;
  box-shadow: 0 14px 28px rgba(0, 0, 0, .2);
}
.device-note { justify-content: center; gap: 6px; margin-top: 18px; color: rgba(255, 255, 255, .4); font-size: 8px; }
.lock-dot { color: #71bbff; font-size: 6px; }

.promise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 140px;
}
.promise-grid article {
  min-height: 270px;
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, .13);
  border-radius: 28px;
  background: rgba(255, 255, 255, .055);
  backdrop-filter: blur(18px);
}
.promise-grid h2 { margin-top: 30px; font-size: 22px; }
.promise-grid p { margin-bottom: 0; font-size: 14px; }
.feature-icon {
  position: relative;
  display: block;
  width: 48px;
  height: 48px;
  border-radius: 15px;
  background: rgba(99, 146, 255, .17);
}
.target-icon::before {
  content: "25";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #a8c7ff;
  font-size: 14px;
  font-weight: 780;
}
.shield-icon::before { content: "◆"; position: absolute; inset: 0; display: grid; place-items: center; color: #85c7ff; font-size: 21px; }
.copy-icon::before,
.copy-icon::after { content: ""; position: absolute; width: 20px; height: 24px; border: 2px solid #9cbfff; border-radius: 6px; }
.copy-icon::before { left: 13px; top: 10px; }
.copy-icon::after { left: 18px; top: 15px; opacity: .55; }

.steps { margin-bottom: 150px; }
.section-heading { max-width: 780px; margin-bottom: 55px; }
.section-heading h2,
.privacy-callout h2,
.closing-card h2 { margin: 0; font-size: clamp(40px, 6vw, 68px); line-height: 1.04; letter-spacing: -.04em; }
.steps ol { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin: 0; padding: 0; list-style: none; }
.steps li {
  min-height: 205px;
  padding: 26px;
  border-top: 1px solid rgba(255, 255, 255, .26);
}
.steps li > span { display: block; margin-bottom: 48px; color: #8dbbff; font-size: 13px; font-weight: 740; }
.steps strong { color: #fff; font-size: 20px; }
.steps li p { margin-bottom: 0; font-size: 14px; }

.privacy-callout {
  position: relative;
  display: grid;
  grid-template-columns: 310px 1fr;
  align-items: center;
  gap: 70px;
  min-height: 520px;
  margin-bottom: 140px;
  padding: 70px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .15);
  border-radius: 42px;
  background: linear-gradient(135deg, rgba(18, 28, 68, .8), rgba(5, 63, 76, .72));
}
.privacy-callout p:last-child { max-width: 650px; }
.privacy-orbit {
  position: relative;
  width: 250px;
  height: 250px;
  border: 1px solid rgba(141, 190, 255, .34);
  border-radius: 50%;
  box-shadow: 0 0 70px rgba(49, 112, 224, .21);
}
.privacy-orbit::before,
.privacy-orbit::after { content: ""; position: absolute; border: 1px solid rgba(255, 255, 255, .18); border-radius: 50%; }
.privacy-orbit::before { inset: 27px; }
.privacy-orbit::after { inset: 62px; }
.privacy-orbit span {
  position: absolute;
  inset: 92px;
  border-radius: 27px 27px 35px 35px;
  background: linear-gradient(145deg, #779fff, #1d8eaa);
  box-shadow: 0 15px 45px rgba(65, 134, 255, .38);
}
.privacy-orbit span::before { content: ""; position: absolute; left: 20px; top: -24px; width: 24px; height: 35px; border: 7px solid #779fff; border-bottom: 0; border-radius: 18px 18px 0 0; }

.closing-card {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 50px;
  min-height: 420px;
  padding: 65px;
  border-radius: 42px;
  background:
    radial-gradient(circle at 85% 20%, rgba(255, 132, 89, .28), transparent 24rem),
    linear-gradient(145deg, #171347, #09465b);
}
.closing-card p:last-child { margin-bottom: 0; }
.site-footer { justify-content: space-between; gap: 30px; padding: 36px 4px 0; }
.site-footer nav { flex-wrap: wrap; justify-content: flex-end; gap: 24px; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 70px; text-align: center; }
  .hero-copy { display: flex; flex-direction: column; align-items: center; }
  .hero .lede { margin-left: auto; margin-right: auto; }
  .phone-stage { margin-top: 40px; }
  .promise-grid { grid-template-columns: 1fr; }
  .promise-grid article { min-height: auto; }
  .privacy-callout { grid-template-columns: 1fr; padding: 55px; }
  .privacy-orbit { margin: 0 auto; }
  .closing-card { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 680px) {
  .landing-shell { width: min(100% - 24px, 1180px); }
  .site-nav { display: none; }
  .header-actions { gap: 10px; }
  .landing header { margin-bottom: 0; }
  .hero { min-height: auto; padding: 75px 0 70px; }
  .hero h1 { font-size: clamp(50px, 15vw, 72px); }
  .phone-stage { min-height: 565px; transform: scale(.9); margin: -10px -20px -30px; }
  .promise-grid,
  .steps,
  .privacy-callout { margin-bottom: 90px; }
  .steps ol { grid-template-columns: 1fr; }
  .steps li { min-height: auto; }
  .steps li > span { margin-bottom: 25px; }
  .privacy-callout { gap: 45px; padding: 38px 24px; border-radius: 30px; }
  .privacy-orbit { width: 210px; height: 210px; }
  .privacy-orbit span { inset: 76px; }
  .privacy-orbit span::before { left: 17px; }
  .closing-card { min-height: 380px; padding: 38px 26px; border-radius: 30px; }
  .section-heading h2,
  .privacy-callout h2,
  .closing-card h2 { font-size: clamp(36px, 11vw, 52px); }
  .site-footer { align-items: flex-start; flex-direction: column; }
  .site-footer nav { justify-content: flex-start; }

  html[lang="zh-Hans"] .hero h1 {
    font-size: 42px;
    line-height: 1.08;
    letter-spacing: -.045em;
  }

  html[lang="zh-Hans"] .section-heading h2,
  html[lang="zh-Hans"] .privacy-callout h2,
  html[lang="zh-Hans"] .closing-card h2 {
    font-size: 34px;
    line-height: 1.12;
    letter-spacing: -.035em;
    text-wrap: balance;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .phone { animation: phone-float 7s ease-in-out infinite; }
  @keyframes phone-float {
    0%, 100% { transform: rotateY(-7deg) rotateX(2deg) rotateZ(2deg) translateY(0); }
    50% { transform: rotateY(-4deg) rotateX(1deg) rotateZ(1deg) translateY(-12px); }
  }
}

[data-locale]:not(.active) { display: none; }