:root {
  --red: #fb5653;
  --red-dark: #de3f3d;
  --ink: #191718;
  --muted: #6f6a6b;
  --paper: #f8f6f3;
  --panel: #ffffff;
  --line: #ded9d5;
  --soft-red: #fff0ee;
  --lime: #dff36b;
  --shadow: 0 24px 70px rgba(50, 31, 29, .14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { overflow-x: hidden; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .22;
  z-index: 20;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.13'/%3E%3C/svg%3E");
}
a { color: inherit; text-decoration: none; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
img { display: block; max-width: 100%; }
:focus-visible { outline: 3px solid var(--lime); outline-offset: 3px; }

.ht-masthead {
  width: min(1240px, calc(100% - 40px));
  height: 74px;
  margin: 18px auto 0;
  padding: 0 12px 0 15px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  background: rgba(255,255,255,.9);
  border: 1px solid rgba(25,23,24,.12);
  border-radius: 17px;
  position: relative;
  z-index: 30;
  box-shadow: 0 8px 30px rgba(32, 19, 18, .06);
  backdrop-filter: blur(12px);
}
.ht-brandmark { display: flex; align-items: center; gap: 11px; min-width: max-content; }
.ht-brandmark img { width: 46px; height: 46px; border-radius: 13px; }
.ht-brandmark span { display: grid; gap: 2px; }
.ht-brandmark strong { font-size: 17px; }
.ht-brandmark small { font-size: 8px; letter-spacing: 1.4px; color: #898385; }
.ht-nav { display: flex; align-items: center; justify-content: center; gap: 30px; font-size: 14px; color: #514c4d; }
.ht-nav a { position: relative; padding: 12px 0; }
.ht-nav a::after { content: ""; position: absolute; height: 2px; left: 0; right: 100%; bottom: 5px; background: var(--red); transition: right .25s ease; }
.ht-nav a:hover::after { right: 0; }
.ht-header-action { padding: 14px 18px; color: #fff; background: var(--ink); border-radius: 11px; font-size: 14px; font-weight: 700; }
.ht-nav-toggle { display: none; border: 0; background: transparent; font-size: 24px; }

.ht-hero {
  width: min(1240px, calc(100% - 40px));
  margin: 0 auto;
  padding: 60px 0 54px;
  display: grid;
  grid-template-columns: minmax(360px, .84fr) minmax(560px, 1.16fr);
  align-items: center;
  gap: 48px;
  position: relative;
}
.ht-hero::before { content: "SYSTEM / CONTROL / YOUR WAY"; position: absolute; left: -42px; bottom: 52px; writing-mode: vertical-rl; transform: rotate(180deg); font: 700 10px/1 Arial, sans-serif; letter-spacing: 2.4px; color: #aaa2a0; }
.ht-kicker { display: flex; align-items: center; gap: 10px; margin: 0 0 19px; color: var(--red-dark); font-size: 12px; font-weight: 800; letter-spacing: 1.4px; }
.ht-kicker span { width: 27px; height: 2px; background: currentColor; }
.ht-hero h1 { margin: 0; font-size: clamp(50px, 5.1vw, 64px); line-height: 1; letter-spacing: 0; }
.ht-hero-subtitle { max-width: 540px; margin: 22px 0 15px; font-size: 24px; font-weight: 700; line-height: 1.58; }
.ht-hero-intro { max-width: 540px; margin: 0; color: var(--muted); font-size: 15px; line-height: 1.85; }
.ht-hero-actions { display: flex; align-items: center; gap: 24px; margin-top: 29px; }
.ht-solid-action { display: inline-flex; align-items: center; gap: 9px; padding: 16px 22px; color: #fff; background: var(--red); border: 1px solid var(--red); border-radius: 10px; font-size: 15px; font-weight: 800; box-shadow: 0 12px 24px rgba(251,86,83,.22); transition: transform .2s, box-shadow .2s; }
.ht-solid-action:hover { transform: translateY(-2px); box-shadow: 0 16px 32px rgba(251,86,83,.3); }
.ht-text-action { font-size: 14px; font-weight: 700; border-bottom: 1px solid #a9a1a0; padding: 10px 0 5px; }
.ht-trust-strip { list-style: none; display: flex; gap: 0; margin: 38px 0 0; padding: 18px 0 0; border-top: 1px solid var(--line); }
.ht-trust-strip li { min-width: 118px; display: flex; align-items: center; gap: 9px; padding-right: 15px; margin-right: 15px; border-right: 1px solid var(--line); font-size: 12px; font-weight: 800; }
.ht-trust-strip li:last-child { border: 0; }
.ht-trust-strip i { color: var(--red); font-size: 18px; }
.ht-trust-strip small { color: #90898a; font-size: 9px; font-weight: 500; }

.ht-product-workspace { margin: 0; position: relative; }
.ht-product-workspace::before { content: ""; position: absolute; width: 190px; height: 190px; right: -20px; top: -24px; background: var(--red); border-radius: 50%; z-index: -1; opacity: .12; }
.ht-workspace-chrome { background: #202022; border: 1px solid #090909; border-radius: 18px; overflow: hidden; box-shadow: var(--shadow); transform: rotate(1deg); }
.ht-workspace-topline { min-height: 48px; padding: 0 17px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; color: #fff; border-bottom: 1px solid #3b393a; font-size: 11px; letter-spacing: .7px; }
.ht-window-dots { display: flex; gap: 6px; }
.ht-window-dots i { width: 8px; height: 8px; border-radius: 50%; background: #6e696a; }
.ht-window-dots i:first-child { background: var(--red); }
.ht-live-label { justify-self: end; display: flex; align-items: center; gap: 6px; color: #c9c4c4; font-size: 10px; }
.ht-live-label i { width: 6px; height: 6px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 0 4px rgba(223,243,107,.1); }
.ht-workspace-grid { display: grid; grid-template-columns: 94px 1fr; }
.ht-workspace-nav { padding: 17px 10px; display: grid; align-content: start; gap: 7px; border-right: 1px solid #3b393a; }
.ht-workspace-nav span { padding: 10px 7px; display: flex; align-items: center; gap: 7px; border-radius: 7px; color: #8f898a; font-size: 10px; }
.ht-workspace-nav .is-current { color: #fff; background: var(--red); }
.ht-workspace-nav i { font-size: 14px; }
.ht-workspace-main { padding: 16px 17px 18px; min-width: 0; }
.ht-user-state { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px; padding-bottom: 13px; border-bottom: 1px solid #3b393a; color: #fff; }
.ht-avatar { width: 32px; height: 32px; display: grid; place-items: center; color: #232323; background: var(--lime); border-radius: 9px; }
.ht-user-state div:nth-child(2) { display: grid; gap: 2px; }
.ht-user-state small { font-size: 9px; color: #8f898a; }
.ht-user-state strong { font-size: 12px; }
.ht-user-state > span { padding: 6px 8px; background: #302e2f; border-radius: 6px; font-size: 9px; color: #d8d3d3; }
.ht-user-state > span i { color: var(--lime); }
.ht-workspace-content { display: grid; grid-template-columns: 204px 1fr; gap: 14px; padding-top: 15px; }
.ht-phone-proof { border: 5px solid #343132; border-radius: 23px; overflow: hidden; background: #eff0f5; box-shadow: 0 12px 24px rgba(0,0,0,.2); }
.ht-phone-proof img { width: 100%; height: auto; }
.ht-workspace-cards { display: grid; align-content: start; gap: 10px; }
.ht-status-card { padding: 13px; color: #fff; background: #2b292a; border: 1px solid #3d3a3b; border-radius: 10px; }
.ht-status-card > div:first-child { display: flex; align-items: center; gap: 7px; margin-bottom: 9px; color: #aaa5a5; }
.ht-status-card > div:first-child i { color: var(--lime); font-size: 17px; }
.ht-status-card small { font-size: 9px; }
.ht-status-card strong { display: block; font-size: 14px; margin-bottom: 5px; }
.ht-status-card > span { color: #989293; font-size: 9px; line-height: 1.4; }
.ht-status-alert { background: #fff4f3; border-color: #fff4f3; color: var(--ink); }
.ht-status-alert > div:first-child { color: #8f7474; }
.ht-status-alert > div:first-child i { color: var(--red); }
.ht-status-alert > span { color: #796c6d; }
.ht-status-card dl { margin: 0; display: grid; gap: 7px; }
.ht-status-card dl div { display: flex; justify-content: space-between; padding-top: 7px; border-top: 1px solid #403d3e; }
.ht-status-card dt, .ht-status-card dd { margin: 0; font-size: 9px; }
.ht-status-card dd { color: #aaa5a5; }
.ht-workspace-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.ht-workspace-tags span { padding: 6px 7px; border: 1px solid #474344; border-radius: 99px; color: #a9a4a4; font-size: 8px; }
.ht-product-workspace figcaption { position: absolute; right: 18px; bottom: -27px; color: #898283; font-size: 10px; }

.ht-state-picker { display: grid; grid-template-columns: minmax(280px, .82fr) minmax(0, 3.18fr); padding-inline: max(0px, calc((100vw - 1440px)/2)); background: var(--red); color: #fff; }
.ht-state-lead { min-width: 0; padding: 64px 36px; border-right: 1px solid rgba(255,255,255,.28); }
.ht-state-lead > span { font: 700 10px/1 Arial, sans-serif; letter-spacing: 1.7px; opacity: .72; }
.ht-state-lead h2 { margin: 23px 0 17px; font-size: 35px; line-height: 1.35; }
.ht-state-lead p { margin: 0; max-width: 230px; line-height: 1.8; font-size: 14px; opacity: .8; }
.ht-state-options { display: grid; grid-template-columns: repeat(4, 1fr); }
.ht-state-options article { min-width: 0; padding: 60px 24px 52px; border-right: 1px solid rgba(255,255,255,.28); position: relative; transition: background .25s, color .25s; }
.ht-state-options article:last-child { border: 0; }
.ht-state-options article:hover { color: var(--ink); background: var(--lime); }
.ht-state-options b { position: absolute; right: 18px; top: 17px; font: 700 11px/1 Arial, sans-serif; opacity: .6; }
.ht-state-options i { display: block; font-size: 28px; margin-bottom: 29px; }
.ht-state-options h3 { font-size: 20px; margin: 0 0 16px; }
.ht-state-options p { margin: 0; font-size: 13px; line-height: 1.75; opacity: .82; }
.ht-state-options span { display: block; margin-top: 25px; font-size: 10px; font-weight: 800; opacity: .72; }

.ht-screen-ledger { width: min(1240px, calc(100% - 40px)); margin: 0 auto; padding: 74px 0 68px; display: grid; grid-template-columns: 70px 330px 1fr; gap: 36px; align-items: start; }
.ht-ledger-index { font: 800 56px/1 Arial, sans-serif; color: transparent; -webkit-text-stroke: 1px #b7afad; }
.ht-ledger-copy h2 { margin: 0 0 19px; font-size: 34px; line-height: 1.4; }
.ht-ledger-copy > p:not(.ht-kicker) { color: var(--muted); font-size: 14px; line-height: 1.85; }
.ht-ledger-copy ul { list-style: none; margin: 24px 0 0; padding: 0; display: grid; gap: 13px; }
.ht-ledger-copy li { display: grid; grid-template-columns: 22px 1fr; gap: 7px; font-size: 12px; line-height: 1.6; }
.ht-ledger-copy li i { color: var(--red); font-size: 17px; }
.ht-screen-rail { display: grid; grid-template-columns: 1.05fr .92fr .92fr; align-items: start; gap: 14px; padding: 12px; border: 1px solid var(--line); background: #ece8e4; }
.ht-screen-rail figure { margin: 0; position: relative; background: #fff; border: 1px solid #d8d2ce; }
.ht-screen-rail figure:nth-child(2) { margin-top: 34px; }
.ht-screen-rail figure:nth-child(3) { margin-top: 68px; }
.ht-screen-rail img { width: 100%; height: auto; }
.ht-screen-rail figcaption { position: absolute; left: 8px; bottom: 8px; padding: 5px 8px; background: rgba(25,23,24,.84); color: #fff; font-size: 9px; border-radius: 4px; }
.ht-swipe-hint { display: none; }

.ht-control-map { background: #202022; color: #fff; padding: 67px max(40px, calc((100vw - 1240px)/2)) 72px; }
.ht-map-heading { display: grid; grid-template-columns: 1fr 440px; gap: 60px; align-items: end; padding-bottom: 32px; border-bottom: 1px solid #444143; }
.ht-map-heading > div { display: grid; grid-template-columns: 45px 1fr; align-items: start; }
.ht-map-heading span { color: var(--red); font: 800 13px/1 Arial, sans-serif; padding-top: 10px; }
.ht-map-heading h2 { margin: 0; max-width: 600px; font-size: 36px; line-height: 1.35; }
.ht-map-heading p { margin: 0; color: #aaa4a5; font-size: 14px; line-height: 1.8; }
.ht-map-body { display: grid; grid-template-columns: 140px 1fr; gap: 36px; padding-top: 37px; }
.ht-map-spine { min-height: 520px; display: grid; justify-items: center; grid-template-rows: auto 1fr auto; color: #746f70; font: 700 9px/1 Arial, sans-serif; letter-spacing: 1.8px; }
.ht-map-spine span { writing-mode: vertical-rl; }
.ht-map-spine i { width: 1px; margin: 15px 0; background: linear-gradient(#4d494a, var(--red), #4d494a); }
.ht-map-spine strong { color: var(--red); writing-mode: vertical-rl; }
.ht-map-clusters { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid #454143; border-left: 1px solid #454143; }
.ht-map-clusters article { padding: 27px 24px 25px; border-right: 1px solid #454143; border-bottom: 1px solid #454143; }
.ht-map-clusters article > span { color: var(--red); font: 700 9px/1 Arial, sans-serif; letter-spacing: 1.2px; }
.ht-map-clusters h3 { margin: 15px 0 11px; font-size: 18px; }
.ht-map-clusters p { margin: 0; color: #aaa5a5; font-size: 12px; line-height: 1.75; }
.ht-map-clusters ul { list-style: none; display: flex; flex-wrap: wrap; gap: 5px; margin: 18px 0 0; padding: 0; }
.ht-map-clusters li { padding: 5px 7px; border: 1px solid #4a4647; border-radius: 4px; color: #c3bebe; font-size: 9px; }

.ht-start-guide { width: min(1120px, calc(100% - 40px)); margin: 64px auto 72px; padding: 36px 0 0; border-top: 1px solid var(--ink); display: grid; grid-template-columns: 290px 1fr; gap: 60px; }
.ht-start-heading h2 { margin: 14px 0 12px; font-size: 30px; line-height: 1.35; }
.ht-start-heading > p:last-child { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.8; }
.ht-start-steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.ht-start-steps li { min-width: 0; padding: 20px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: #fff; }
.ht-start-steps li > span { color: var(--red); font: 800 9px/1 Arial, sans-serif; letter-spacing: 1.2px; }
.ht-start-steps li > div { display: flex; align-items: center; gap: 9px; margin: 22px 0 13px; }
.ht-start-steps i { color: var(--red); font-size: 20px; }
.ht-start-steps h3 { margin: 0; font-size: 15px; }
.ht-start-steps p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.75; }
.ht-start-steps a { color: var(--red-dark); font-weight: 800; border-bottom: 1px solid currentColor; }

.ht-voices { padding: 69px max(40px, calc((100vw - 1240px)/2)) 76px; background: #efe9e4; display: grid; grid-template-columns: 280px 1fr; gap: 54px; }
.ht-voice-intro { position: sticky; top: 28px; align-self: start; }
.ht-voice-intro h2 { margin: 0 0 18px; font-size: 34px; line-height: 1.4; }
.ht-voice-intro > p:not(.ht-kicker) { color: var(--muted); font-size: 13px; line-height: 1.8; }
.ht-voice-intro > p.ht-voice-disclosure { margin-top: 18px; padding-top: 16px; border-top: 1px solid #d2cac4; color: #817979; font-size: 10px; line-height: 1.7; }
.ht-voice-wall { columns: 2 320px; column-gap: 15px; }
.ht-voice { break-inside: avoid; display: inline-block; width: 100%; margin: 0 0 15px; padding: 22px; background: #fff; border: 1px solid #d8d0ca; }
.ht-voice:nth-child(2), .ht-voice:nth-child(5) { background: var(--ink); color: #fff; }
.ht-voice-wide { border-top: 4px solid var(--red); }
.ht-voice-offset { transform: translateX(18px); width: calc(100% - 18px); }
.ht-voice-low { border-bottom: 4px solid var(--lime); }
.ht-voice-meta { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px; }
.ht-voice-avatar { width: 35px; height: 35px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--red); font-size: 12px; font-weight: 800; }
.ht-voice-meta > div { display: grid; gap: 3px; }
.ht-voice-name { font-size: 12px; font-weight: 800; }
.ht-voice-meta small { color: #9a9392; font-size: 9px; }
.ht-stars { color: var(--red); font-size: 10px; letter-spacing: 1px; white-space: nowrap; }
.ht-stars i { color: #b9b1af; font-style: normal; }
.ht-voice blockquote { margin: 18px 0 0; font-size: 12px; line-height: 1.85; color: #5f595a; }
.ht-voice:nth-child(2) blockquote, .ht-voice:nth-child(5) blockquote { color: #c8c1c2; }

.ht-faq { width: min(1120px, calc(100% - 40px)); margin: 0 auto; padding: 74px 0 70px; display: grid; grid-template-columns: 320px 1fr; gap: 84px; }
.ht-faq-intro > span { color: var(--red); font: 800 10px/1 Arial, sans-serif; letter-spacing: 1.5px; }
.ht-faq-intro h2 { margin: 20px 0 15px; font-size: 34px; line-height: 1.4; }
.ht-faq-intro p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }
.ht-faq-intro a { display: inline-flex; align-items: center; gap: 8px; margin-top: 26px; color: var(--red-dark); font-size: 13px; font-weight: 800; border-bottom: 1px solid currentColor; padding-bottom: 5px; }
.ht-faq-list { border-top: 1px solid var(--ink); }
.ht-faq details { border-bottom: 1px solid var(--line); }
.ht-faq summary { cursor: pointer; list-style: none; display: grid; grid-template-columns: 42px 1fr auto; align-items: center; gap: 8px; padding: 20px 0; font-size: 14px; font-weight: 800; }
.ht-faq summary::-webkit-details-marker { display: none; }
.ht-faq summary span { color: #aaa2a0; font: 700 10px/1 Arial, sans-serif; }
.ht-faq summary i { font-size: 19px; transition: transform .2s; }
.ht-faq details[open] summary i { transform: rotate(45deg); color: var(--red); }
.ht-faq details p { margin: -6px 42px 20px; color: var(--muted); font-size: 12px; line-height: 1.85; }

.ht-final-call { width: min(1240px, calc(100% - 40px)); margin: 0 auto 28px; min-height: 260px; display: grid; grid-template-columns: 190px 1fr 180px; gap: 30px; align-items: center; padding: 42px; color: #fff; background: var(--red); border-radius: 2px 42px 2px 2px; position: relative; overflow: hidden; }
.ht-final-call::after { content: "HT"; position: absolute; right: 150px; top: -63px; font: 900 260px/1 Arial, sans-serif; color: rgba(255,255,255,.07); pointer-events: none; }
.ht-final-brand { position: relative; z-index: 1; display: flex; align-items: center; gap: 13px; }
.ht-final-brand img { width: 76px; height: 76px; border-radius: 20px; }
.ht-final-brand span { font: 800 10px/1.45 Arial, sans-serif; letter-spacing: 1.4px; }
.ht-final-copy { position: relative; z-index: 1; }
.ht-final-kicker { margin: 0 0 8px; font-size: 11px; font-weight: 800; opacity: .75; }
.ht-final-copy h2 { margin: 0 0 12px; font-size: 33px; }
.ht-final-desc { margin: 0; max-width: 630px; font-size: 12px; line-height: 1.75; opacity: .78; }
.ht-release { width: fit-content; margin: 17px 0 0; padding: 7px 10px; display: flex; align-items: center; gap: 9px; border: 1px solid rgba(255,255,255,.28); background: rgba(113,26,25,.16); border-radius: 7px; font-size: 10px; }
.ht-release i { font-size: 14px; }
.ht-release strong { font-size: 11px; }
.ht-release time { padding-left: 9px; border-left: 1px solid rgba(255,255,255,.3); color: rgba(255,255,255,.78); }
.ht-final-call > a { position: relative; z-index: 1; justify-self: end; width: 132px; height: 132px; display: grid; place-items: center; align-content: center; gap: 7px; color: var(--ink); background: var(--lime); border-radius: 50%; font-weight: 800; transition: transform .25s; }
.ht-final-call > a:hover { transform: rotate(-5deg) scale(1.04); }
.ht-final-call > a i { font-size: 22px; }

.ht-footer { width: min(1240px, calc(100% - 40px)); margin: 0 auto; padding: 32px 0 38px; display: grid; grid-template-columns: 1.4fr 1fr auto; gap: 40px; align-items: end; border-top: 1px solid var(--line); }
.ht-footer-brand { display: inline-flex; align-items: center; gap: 9px; }
.ht-footer-brand img { width: 34px; height: 34px; border-radius: 9px; }
.ht-footer-brand strong { font-size: 14px; }
.ht-footer > div p { max-width: 420px; margin: 11px 0 0; color: #8b8585; font-size: 10px; line-height: 1.6; }
.ht-footer nav { display: flex; flex-wrap: wrap; gap: 18px; font-size: 10px; color: #777172; }
.ht-copyright { margin: 0; text-align: right; font: 700 9px/1.7 Arial, sans-serif; color: #777172; }
.ht-copyright span { font-family: "Microsoft YaHei", sans-serif; font-weight: 400; }
.ht-backtop { position: fixed; right: 22px; bottom: 22px; width: 42px; height: 42px; border: 0; border-radius: 50%; color: #fff; background: var(--ink); box-shadow: 0 8px 20px rgba(0,0,0,.18); cursor: pointer; z-index: 25; opacity: 0; visibility: hidden; transform: translateY(8px); transition: .2s; }
.ht-backtop.is-visible { opacity: 1; visibility: visible; transform: none; }

@media (max-width: 1080px) {
  .ht-hero { grid-template-columns: .85fr 1.15fr; gap: 28px; }
  .ht-workspace-content { grid-template-columns: 178px 1fr; }
  .ht-state-picker { grid-template-columns: 250px 1fr; }
  .ht-state-options { grid-template-columns: repeat(2, 1fr); }
  .ht-state-options article:nth-child(2) { border-right: 0; }
  .ht-state-options article:nth-child(-n+2) { border-bottom: 1px solid rgba(255,255,255,.28); }
  .ht-screen-ledger { grid-template-columns: 50px 280px 1fr; gap: 24px; }
  .ht-map-clusters { grid-template-columns: repeat(2, 1fr); }
  .ht-start-guide { grid-template-columns: 230px 1fr; gap: 36px; }
  .ht-start-steps { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .ht-masthead { grid-template-columns: auto auto 1fr; gap: 12px; }
  .ht-nav-toggle { display: block; justify-self: end; grid-column: 2; grid-row: 1; }
  .ht-header-action { justify-self: end; grid-column: 3; grid-row: 1; }
  .ht-nav { display: none; position: absolute; left: 0; right: 0; top: calc(100% + 8px); padding: 12px; background: #fff; border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 12px 30px rgba(0,0,0,.1); }
  .ht-nav.is-open { display: grid; }
  .ht-nav a { padding: 12px; border-bottom: 1px solid #eee9e5; }
  .ht-hero { grid-template-columns: 1fr; padding-top: 47px; }
  .ht-hero-message { padding: 0 4vw; }
  .ht-hero::before { display: none; }
  .ht-product-workspace { width: min(670px, 100%); justify-self: center; }
  .ht-workspace-chrome { transform: none; }
  .ht-state-picker { grid-template-columns: 1fr; }
  .ht-state-lead { padding: 48px 8vw 38px; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.28); }
  .ht-state-lead p { max-width: 520px; }
  .ht-screen-ledger { grid-template-columns: 65px 1fr; }
  .ht-screen-rail { grid-column: 1 / -1; }
  .ht-map-heading { grid-template-columns: 1fr; gap: 20px; }
  .ht-map-body { grid-template-columns: 70px 1fr; }
  .ht-voices { grid-template-columns: 1fr; }
  .ht-voice-intro { position: static; }
  .ht-faq { grid-template-columns: 1fr; gap: 36px; }
  .ht-final-call { grid-template-columns: 160px 1fr; }
  .ht-final-call > a { grid-column: 1 / -1; justify-self: start; width: auto; height: auto; border-radius: 9px; padding: 15px 20px; display: flex; }
  .ht-footer { grid-template-columns: 1fr auto; }
  .ht-footer nav { grid-column: 1 / -1; grid-row: 1; justify-content: flex-end; }
}

@media (max-width: 640px) {
  .ht-masthead { width: calc(100% - 24px); height: 66px; margin-top: 10px; padding-left: 10px; }
  .ht-masthead { grid-template-columns: minmax(0, 1fr) auto auto; gap: 8px; padding-right: 9px; }
  .ht-brandmark img { width: 42px; height: 42px; }
  .ht-brandmark { min-width: 0; gap: 8px; }
  .ht-brandmark strong { font-size: 16px; white-space: nowrap; }
  .ht-brandmark small { display: none; }
  .ht-nav-toggle { grid-column: 3; width: 38px; height: 38px; padding: 0; display: grid; place-items: center; }
  .ht-nav-toggle i { display: none; }
  .ht-nav-toggle::before { content: "☰"; font: 700 24px/1 Arial, sans-serif; }
  .ht-nav-toggle[aria-expanded="true"]::before { content: "×"; font-size: 28px; }
  .ht-header-action { display: inline-flex; grid-column: 2; grid-row: 1; align-items: center; gap: 3px; padding: 10px 11px; border-radius: 9px; font-size: 0; }
  .ht-header-action::before { content: "下载"; font-size: 12px; }
  .ht-header-action i { font-size: 13px; }
  .ht-hero { width: calc(100% - 28px); padding: 40px 0 44px; gap: 39px; }
  .ht-hero-message { padding: 0; }
  .ht-hero h1 { font-size: 38px; }
  .ht-hero-subtitle { font-size: 20px; line-height: 1.5; }
  .ht-hero-intro { font-size: 14px; }
  .ht-hero-actions { align-items: stretch; gap: 13px; }
  .ht-solid-action { justify-content: center; flex: 1; }
  .ht-text-action { font-size: 12px; align-self: center; }
  .ht-trust-strip { display: grid; grid-template-columns: repeat(3, 1fr); }
  .ht-trust-strip li { min-width: 0; padding: 0 6px; margin: 0; display: grid; justify-items: center; text-align: center; }
  .ht-trust-strip li i { font-size: 19px; }
  .ht-product-workspace figcaption { position: static; margin-top: 10px; text-align: center; }
  .ht-workspace-topline { grid-template-columns: auto 1fr; }
  .ht-workspace-topline strong { justify-self: center; }
  .ht-live-label { display: none; }
  .ht-workspace-grid { grid-template-columns: 1fr; }
  .ht-workspace-nav { grid-template-columns: repeat(5, 1fr); padding: 8px; border-right: 0; border-bottom: 1px solid #3b393a; }
  .ht-workspace-nav span { display: grid; justify-items: center; gap: 4px; padding: 8px 2px; }
  .ht-workspace-content { grid-template-columns: 43% 1fr; }
  .ht-status-card { padding: 10px; }
  .ht-status-card strong { font-size: 12px; }
  .ht-status-card dl div:nth-child(3) { display: none; }
  .ht-workspace-tags span { padding: 5px; font-size: 7px; }
  .ht-state-options { grid-template-columns: 1fr; }
  .ht-state-lead h2 { font-size: 27px; }
  .ht-state-options article { padding: 31px 8vw; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.28); }
  .ht-state-options article:last-child { border-bottom: 0; }
  .ht-state-options i { margin-bottom: 18px; }
  .ht-state-options span { margin-top: 15px; }
  .ht-screen-ledger { width: 100%; padding: 50px 0 45px; display: block; }
  .ht-ledger-index { padding: 0 20px; font-size: 40px; }
  .ht-ledger-copy { padding: 18px 20px 26px; }
  .ht-ledger-copy h2 { font-size: 27px; }
  .ht-screen-rail { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; padding: 12px 20px; border-left: 0; border-right: 0; scrollbar-width: none; }
  .ht-screen-rail::-webkit-scrollbar { display: none; }
  .ht-screen-rail figure { flex: 0 0 74vw; scroll-snap-align: center; }
  .ht-screen-rail figure:nth-child(2), .ht-screen-rail figure:nth-child(3) { margin-top: 0; }
  .ht-swipe-hint { display: block; padding: 0 20px; color: #8f8888; font-size: 10px; }
  .ht-control-map { padding: 48px 20px 50px; }
  .ht-map-heading h2 { font-size: 27px; }
  .ht-map-heading > div { grid-template-columns: 33px 1fr; }
  .ht-map-body { grid-template-columns: 1fr; }
  .ht-map-spine { min-height: auto; display: flex; align-items: center; gap: 12px; }
  .ht-map-spine span, .ht-map-spine strong { writing-mode: initial; }
  .ht-map-spine i { flex: 1; height: 1px; margin: 0; }
  .ht-map-clusters { grid-template-columns: 1fr; }
  .ht-start-guide { width: calc(100% - 40px); margin-bottom: 48px; grid-template-columns: 1fr; gap: 24px; }
  .ht-start-heading h2 { font-size: 25px; }
  .ht-voices { padding: 48px 20px 52px; gap: 28px; }
  .ht-voice-intro { display: block; }
  .ht-voice-intro h2 { font-size: 27px; }
  .ht-voice-wall { columns: 1; }
  .ht-voice-offset { transform: none; width: 100%; }
  .ht-faq { width: calc(100% - 40px); padding: 50px 0 48px; }
  .ht-faq-intro h2 { font-size: 27px; }
  .ht-faq summary { grid-template-columns: 30px 1fr auto; font-size: 13px; line-height: 1.55; }
  .ht-faq details p { margin: -4px 0 18px 38px; }
  .ht-final-call { width: calc(100% - 28px); grid-template-columns: 1fr; padding: 28px 24px; border-radius: 2px 28px 2px 2px; }
  .ht-final-brand img { width: 58px; height: 58px; }
  .ht-final-copy h2 { font-size: 25px; }
  .ht-footer { width: calc(100% - 40px); grid-template-columns: 1fr; gap: 22px; }
  .ht-footer nav { grid-column: auto; grid-row: auto; justify-content: flex-start; }
  .ht-copyright { text-align: left; }
  .ht-backtop { right: 14px; bottom: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}