/* Tower OS marketing tokens; provenance: migration/site-style-source.json. */
@font-face { font-family: "Tower Serif"; src: url("/tower-serif.woff2") format("woff2"); font-weight:600; font-display:swap; }
:root {
  --mk-bg: #faf9f5;
  --mk-paper-2: #f2f0e9;
  --mk-card: #fffdf9;
  --mk-text: #141413;
  --mk-ink-2: #3b3a35;
  --mk-muted: #66645d;
  --mk-faint: #b0aea5;
  --mk-line: #e3dfd6;
  --mk-border: #d8d5cc;
  --mk-surface: #e8e6dc;
  --mk-accent: #d97757;
  --mk-accent-ink: #b46546;
  --mk-accent-soft: #f3e8df;
  --mk-dark: #1d1d1a;
  --mk-dark-2: #2a2a25;
  --mk-dark-line: #403e37;
  --mk-dark-muted: #c4c0b8;
  --mk-dark-accent: #e8ab8d;
  --mk-ok: #3f8a63;
  --mk-white: #fff;
  --mk-ink-line: #3d3d3a;
  --mk-shadow: 0 24px 60px -28px rgba(20, 20, 19, .28);
  --mk-ease: cubic-bezier(.2, .7, .2, 1);
  --mk-serif: "Tower Serif", "Songti SC", "STSong", "Noto Serif CJK SC", "Noto Serif SC", Georgia, serif;
  --mk-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
* {
  box-sizing:border-box}
html {
  scroll-behavior:smooth;
  scroll-padding-top:32px}
body {
  margin:0;
  background:var(--mk-bg);
  color:var(--mk-text);
  font-family:var(--mk-sans);
  -webkit-font-smoothing:antialiased}
a {
  color:inherit;
  text-decoration:none}
button,a {
  -webkit-tap-highlight-color:transparent}
a:focus-visible {
  outline:3px solid var(--mk-accent);
  outline-offset:6px}
a:hover {
  opacity:.85}
.wrap {
  max-width:1240px;
  padding:0 48px;
  margin:auto}
.skip {
  position:absolute;
  top:-100px;
  background:var(--mk-text);
  color:white;
  padding:12px;
  z-index:10}
.skip:focus {
  top:0}
.nav {
  height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px}
.brand {
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:21px;
  letter-spacing:-.7px}
.brand b {
  font-weight:400}
.nav nav {
  display:flex;
  align-items:center;
  gap:36px;
  font-size:13px}
.nav-cta {
  border:1px solid var(--mk-text);
  padding:12px 18px;
  border-radius:10px;
  display:flex;
  gap:28px}
.hero {
  display:grid;
  grid-template-columns:1fr 1fr;
  align-items:center;
  gap:44px;
  padding-top:54px;
  padding-bottom:74px}
.eyebrow {
  color:var(--mk-accent-ink);
  font-size:13px;
  font-weight:700;
  letter-spacing:2px;
  line-height:1.6;
  display:flex;
  align-items:center;
  gap:10px}
.eyebrow>span {
  height:6px;
  width:6px;
  background:var(--mk-text);
  border-radius:50%}
h1,h2,h3,p {
  margin:0}
h1 {
  font-family:var(--mk-serif);
  font-size:58px;
  letter-spacing:-3px;
  font-weight:650;
  line-height:1.23;
  margin:26px 0}
.serif {
  font-family:var(--mk-serif);
  font-weight:400;
  color:var(--mk-accent-ink)}
.lede {
  color:var(--mk-muted);
  font-size:17px;
  line-height:1.9}
.actions {
  display:flex;
  align-items:center;
  gap:28px;
  margin-top:32px}
.button {
  display:inline-flex;
  justify-content:space-between;
  align-items:center;
  gap:28px;
  padding:18px 23px;
  border-radius:10px;
  font-size:15px;
  line-height:1.4;
  font-weight:600}
.primary {
  background:var(--mk-text);
  color:var(--mk-bg)}
.text-link {
  font-size:12px;
  font-weight:600}
.compat {
  display:flex;
  align-items:center;
  gap:14px;
  font-size:9px;
  letter-spacing:1px;
  color:var(--mk-muted);
  margin-top:36px}
.compat i {
  width:3px;
  height:3px;
  background:var(--mk-muted);
  border-radius:50%}
.field-scene {
  height:544px;
  position:relative;
  background:var(--mk-paper-2);
  border-radius:14px;
  overflow:hidden;
  display:flex;
  align-items:flex-end;
  justify-content:center}
.scene-grid {
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(20,20,19,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(20,20,19,.06) 1px,transparent 1px);
  background-size:38px 38px}
.scene-caption {
  position:absolute;
  left:32px;
  right:28px;
  top:35px;
  font-size:8px;
  letter-spacing:1.2px;
  display:flex;
  justify-content:space-between;
  color:var(--mk-muted)}
.device {
  width:263px;
  height:443px;
  transform:rotate(-7deg) translate(-5px,12px);
  background:var(--mk-dark);
  border:5px solid var(--mk-dark);
  border-radius:28px;
  box-shadow:20px 18px 0 rgba(20,20,19,.07),10px 20px 35px rgba(20,20,19,.14);
  padding:9px;
  position:relative}
.device-notch {
  position:absolute;
  top:4px;
  left:89px;
  width:78px;
  height:12px;
  border-radius:0 0 8px 8px;
  background:var(--mk-dark);
  z-index:1}
.device-screen {
  background:var(--mk-card);
  border-radius:16px;
  height:100%;
  padding:23px 13px 8px}
.screen-top {
  display:flex;
  align-items:center;
  font-weight:bold;
  gap:7px;
  font-size:11px}
.avatar {
  margin-left:auto;
  border:1px solid var(--mk-line);
  border-radius:50%;
  padding:7px;
  font-size:8px}
.screen-greeting {
  font-weight:bold;
  font-size:20px;
  margin-top:20px}
.screen-sub {
  font-size:7px;
  color:var(--mk-muted);
  margin-top:5px}
.screen-card {
  background:var(--mk-text);
  border-radius:10px;
  color:var(--mk-bg);
  padding:13px;
  margin-top:15px;
  display:flex;
  flex-direction:column;
  align-items:flex-start;
  gap:7px}
.screen-symbol {
  font-size:17px;
  color:var(--mk-dark-accent)}
.screen-card strong {
  font-size:14px}
.screen-card small {
  font-size:7px;
  color:var(--mk-dark-muted)}
.screen-card b {
  font-size:8px;
  border-top:1px solid #ffffff25;
  padding-top:10px;
  width:100%;
  color:var(--mk-dark-accent)}
.screen-mini {
  display:flex;
  gap:10px;
  align-items:center;
  border:1px solid var(--mk-line);
  border-radius:8px;
  padding:11px 9px;
  margin-top:9px}
.screen-mini>div {
  flex:1}
.screen-mini strong,.screen-mini small {
  display:block;
  font-size:10px}
.screen-mini small {
  font-size:7px;
  margin-top:4px;
  color:var(--mk-muted)}
.mini-symbol {
  font-size:23px}
.screen-bottom {
  display:flex;
  justify-content:space-between;
  margin-top:14px;
  font-size:7px;
  color:var(--mk-text);
  font-weight:bold}
.screen-bottom span {
  color:var(--mk-muted);
  font-weight:400}
.floating-tag {
  position:absolute;
  right:18px;
  bottom:69px;
  display:flex;
  gap:12px;
  align-items:center;
  background:var(--mk-white);
  border-radius:8px;
  padding:17px;
  box-shadow:0 10px 30px rgba(20,20,19,.06)}
.tag-icon {
  font-size:25px;
  width:36px;
  height:36px;
  border-radius:50%;
  background:var(--mk-dark-accent);
  text-align:center}
.floating-tag b {
  display:block;
  font-size:11px}
.floating-tag small {
  display:block;
  font-size:9px;
  color:var(--mk-muted);
  margin-top:4px}
.illustration-note {
  position:absolute;
  right:18px;
  bottom:16px;
  font-size:9px;
  color:var(--mk-muted)}
.trust-strip {
  border-top:1px solid var(--mk-line);
  border-bottom:1px solid var(--mk-line)}
.trust-strip .wrap {
  height:92px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:15px}
.trust-strip span:first-child {
  font-size:11px;
  color:var(--mk-muted);
  margin-right:40px}
.trust-strip b {
  font-size:15px;
  font-weight:500}
.strip-plus {
  font-size:15px;
  color:var(--mk-faint)}
.section {
  padding-top:88px;
  padding-bottom:92px}
.section-heading {
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:30px;
  margin-bottom:40px}
h2 {
  font-family:var(--mk-serif);
  font-size:35px;
  font-weight:550;
  line-height:1.45;
  letter-spacing:-1px}
.section-heading h2 {
  margin-top:15px}
.section-heading p {
  font-size:12px;
  line-height:1.9;
  color:var(--mk-muted);
  padding-bottom:7px}
.workflow-grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:22px}
.workflow {
  border:1px solid var(--mk-line);
  padding:29px;
  border-radius:14px}
.number {
  font-size:9px;
  letter-spacing:1px;
  color:var(--mk-muted)}
.line-icon {
  font-size:37px;
  margin:27px 0 18px;
  line-height:1}
.workflow h3 {
  font-size:20px;
  margin-bottom:14px}
.workflow p {
  font-size:12px;
  line-height:1.95;
  color:var(--mk-muted);
  min-height:70px}
.card-foot {
  border-top:1px solid var(--mk-line);
  padding-top:22px;
  margin-top:25px;
  font-size:10px}
.offline-section {
  background:var(--mk-dark);
  color:var(--mk-bg);
  padding:76px 0}
.offline-grid {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:90px}
.offline-grid .eyebrow {
  color:var(--mk-dark-accent)}
.offline-grid h2 {
  margin-top:23px;
  font-size:40px}
.offline-grid>div>p {
  font-size:12px;
  line-height:2;
  color:var(--mk-dark-muted);
  margin-top:22px}
.offline-grid .text-link {
  display:inline-block;
  margin-top:28px;
  color:var(--mk-dark-accent)}
.offline-steps {
  list-style:none;
  padding:0;
  margin:0}
.offline-steps li {
  display:flex;
  gap:22px;
  padding:24px 0;
  border-bottom:1px solid #ffffff25}
.offline-steps li:first-child {
  padding-top:0}
.offline-steps li>span {
  font-family:var(--mk-serif);
  font-size:24px;
  color:var(--mk-dark-accent);
  line-height:1.25}
.offline-steps h3 {
  font-size:16px;
  margin-bottom:10px}
.offline-steps p {
  font-size:12px;
  line-height:1.9;
  color:var(--mk-dark-muted)}
.closing {
  padding-top:70px;
  padding-bottom:70px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:30px}
.closing h2 {
  font-size:30px;
  margin-top:13px}
.footer {
  border-top:1px solid var(--mk-line);
  min-height:108px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  font-size:10px;
  color:var(--mk-muted)}
.footer .brand {
  font-size:16px;
  color:var(--mk-text)}
.download-main {
  padding-top:55px;
  padding-bottom:70px}
.download-main>h1 {
  font-size:58px;
  letter-spacing:-2px}
.download-grid {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:80px;
  align-items:start;
  margin-top:56px}
.download-panel {
  border:1px solid var(--mk-line);
  background:var(--mk-card);
  padding:35px;
  border-radius:8px}
.download-panel-top {
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px}
.platform-pill {
  font-size:9px;
  letter-spacing:1px;
  border:1px solid var(--mk-border);
  padding:8px;
  border-radius:3px}
.download-panel h2 {
  font-size:29px;
  margin-top:26px}
.download-panel>p {
  font-size:11px;
  line-height:1.85;
  color:var(--mk-muted);
  margin-top:12px}
.download-button {
  width:100%;
  margin-top:28px}
.download-panel .download-note {
  font-size:11px;
  margin-top:20px}
.specs {
  margin-top:27px;
  margin-bottom:0;
  border-top:1px solid var(--mk-line)}
.specs>div {
  display:flex;
  justify-content:space-between;
  padding-top:19px;
  font-size:11px;
  gap:15px}
.specs dt {
  color:var(--mk-muted)}
.specs dd {
  margin:0}
.installation h2 {
  font-size:30px;
  margin-top:12px;
  margin-bottom:30px}
.installation .offline-steps li {
  border-color:var(--mk-line)}
.installation .offline-steps li>span {
  color:var(--mk-accent)}
.installation .offline-steps p {
  color:var(--mk-muted)}
.notice {
  padding:20px;
  margin-top:24px;
  border-left:2px solid var(--mk-accent);
  background:var(--mk-accent-soft);
  font-size:11px}
.notice p {
  line-height:1.85;
  margin-top:7px;
  color:var(--mk-ink-2)}
.before-use {
  margin-top:80px;
  border-top:1px solid var(--mk-line);
  padding-top:50px}
.before-use h2 {
  font-size:28px;
  margin-top:15px}
.preflight-grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:35px;
  margin-top:38px}
.preflight-grid article>span {
  font-size:10px;
  color:var(--mk-muted)}
.preflight-grid h3 {
  font-size:16px;
  margin:14px 0}
.preflight-grid p {
  font-size:12px;
  line-height:1.9;
  color:var(--mk-muted)}
@media(min-width:1500px) {
  .hero {
  padding-top:80px;
  padding-bottom:100px}
}
@media(max-width:950px) {
  .wrap {
  padding-left:28px;
  padding-right:28px}
.hero {
  gap:25px}
h1 {
  font-size:52px}
.field-scene {
  height:495px}
.device {
  width:246px;
  height:426px}
.device-notch {
  left:78px}
.floating-tag {
  right:7px;
  padding:12px}
.actions {
  gap:16px;
  flex-wrap:wrap}
.offline-grid {
  gap:45px}
.download-grid {
  gap:35px}
.trust-strip span:first-child {
  margin-right:10px}
.workflow {
  padding:22px}
}
@media(max-width:680px) {
  .wrap {
  padding-left:23px;
  padding-right:23px}
.nav {
  height:72px}
.brand {
  font-size:18px;
  gap:8px}
.brand img {
  width:31px;
  height:31px}
.nav nav {
  gap:0}
.nav nav>a:not(.nav-cta) {
  display:none}
.nav-cta {
  font-size:11px;
  gap:12px;
  padding:10px 12px}
.hero {
  grid-template-columns:1fr;
  padding-top:33px;
  padding-bottom:42px;
  gap:38px}
h1 {
  font-size:44px;
  margin:23px 0;
  letter-spacing:-2.5px}
.lede {
  font-size:15px}
.actions {
  margin-top:25px}
.compat {
  font-size:8px;
  margin-top:25px}
.field-scene {
  height:462px;
  border-top-left-radius:14px}
.device {
  height:414px;
  transform:rotate(-6deg) translate(-7px,15px)}
.scene-caption {
  font-size:7px;
  top:25px;
  left:40px}
.floating-tag {
  right:10px;
  bottom:65px}
.trust-strip .wrap {
  height:auto;
  min-height:95px;
  flex-wrap:wrap;
  justify-content:space-around;
  padding-top:20px;
  padding-bottom:20px;
  gap:12px}
.trust-strip span:first-child {
  width:100%;
  text-align:center;
  font-size:10px;
  margin:0 0 6px}
.trust-strip b {
  font-size:12px}
.strip-plus {
  font-size:10px}
.section {
  padding-top:52px;
  padding-bottom:52px}
.section-heading {
  display:block;
  margin-bottom:28px}
h2 {
  font-size:29px}
.section-heading p {
  margin-top:18px}
.workflow-grid {
  grid-template-columns:1fr;
  gap:14px}
.workflow {
  padding:25px}
.line-icon {
  margin:20px 0}
.workflow p {
  min-height:0;
  font-size:13px}
.card-foot {
  margin-top:20px;
  padding-top:18px}
.offline-section {
  padding:50px 0}
.offline-grid {
  grid-template-columns:1fr;
  gap:42px}
.offline-grid h2 {
  font-size:33px}
.offline-grid>div>p br {
  display:none}
.closing {
  display:block;
  padding-top:45px;
  padding-bottom:45px}
.closing h2 {
  font-size:25px}
.closing .button {
  margin-top:24px}
.footer {
  flex-wrap:wrap;
  justify-content:space-between;
  padding-top:25px;
  padding-bottom:25px;
  gap:20px}
.footer>span {
  order:3;
  width:100%;
  font-size:9px}
.download-main {
  padding-top:32px}
.download-main>h1 {
  font-size:37px;
  letter-spacing:-1.7px}
.download-grid {
  grid-template-columns:1fr;
  gap:42px;
  margin-top:35px}
.download-panel {
  padding:25px}
.download-panel h2 {
  font-size:26px}
.before-use {
  margin-top:50px;
  padding-top:36px}
.before-use h2 {
  font-size:24px}
.preflight-grid {
  grid-template-columns:1fr;
  gap:27px}
.preflight-grid h3 {
  margin:10px 0}
.offline-steps p,.preflight-grid p {
  font-size:13px}
}
@media(prefers-reduced-motion:reduce) {
  html {
  scroll-behavior:auto}
}


/* Tower product-family wordmark, navigation and controls. */
.brand { gap:0; align-items:baseline; white-space:nowrap; }
.brand-word,.brand-dot { font:600 30px/1 var(--mk-serif); letter-spacing:-.02em; }
.brand-dot { color:var(--mk-accent); }
.brand-product { margin-left:10px; font:600 12px/1 var(--mk-sans); letter-spacing:.14em; }
.nav-cta { background:var(--mk-text); color:var(--mk-white); font-size:15px; min-height:44px; align-items:center; }
.nav nav { font-size:15px; }
.button:hover,.nav-cta:hover { opacity:1; background:var(--mk-ink-line); }
.eyebrow>span { background:var(--mk-accent); }
.workflow { background:var(--mk-card); }
.announcement { display:flex; justify-content:center; align-items:center; flex-wrap:wrap; gap:10px; min-height:40px; padding:8px 16px; background:var(--mk-text); color:var(--mk-dark-muted); font-size:13px; }
.announcement strong { color:var(--mk-white); font-weight:600; }
.announcement a { color:var(--mk-dark-accent); }
.announcement-dot { width:6px; height:6px; border-radius:50%; background:var(--mk-accent); }
::selection { background:var(--mk-accent-soft); }
@media(max-width:680px) {
  .brand-word,.brand-dot { font-size:26px; }
  .brand-product { font-size:10px; margin-left:7px; }
  .nav-cta { font-size:12px; }
  .announcement-detail { display:none; }
}