:root {
  --red: #E8452C;
  --red-deep: #c63720;
  --ink: #1b2430;
  --ground: #f2f4f7;
  --muted: #4d5663;
  --line: #d4d9df;
  --white: #ffffff;
  --font: "Nunito", system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); color: var(--ink); background: var(--white); font-size: 17px; font-weight: 500; line-height: 1.6; overflow-x: clip; }
html[lang="zh"] body { line-height: 1.75; }
img, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
h1, h2, h3 { margin: 0; line-height: 1.1; letter-spacing: -0.015em; }
h2 { font-weight: 900; font-size: clamp(30px, 4.4vw, 46px); max-width: 16ch; }
html[lang="zh"] h2 { max-width: 14em; letter-spacing: 0; }
p { margin: 0; }
.wrap { width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 20px; }
:focus-visible { outline: 3px solid var(--red); outline-offset: 3px; border-radius: 6px; }

/* header */
.top { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.94); backdrop-filter: saturate(1.4) blur(8px); border-bottom: 1px solid transparent; transition: border-color .2s; }
.top.scrolled { border-bottom-color: var(--line); }
.top-row { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 12px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand img { border-radius: 9px; }
.wordmark { font-weight: 900; font-size: 23px; letter-spacing: -0.01em; }
.wordmark span { color: var(--red); }
.zh-name { font-weight: 700; font-size: 14px; color: var(--muted); padding-top: 3px; }
.top-actions { display: flex; align-items: center; gap: 12px; }
.lang { display: flex; background: var(--ground); border-radius: 999px; padding: 3px; }
.lang button { font: inherit; font-size: 14px; font-weight: 800; border: 0; background: none; color: var(--muted); padding: 6px 11px; border-radius: 999px; cursor: pointer; }
.lang button[aria-pressed="true"] { background: var(--white); color: var(--ink); box-shadow: 0 1px 2px rgba(27,36,48,.12); }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 9px; min-height: 54px; padding: 0 26px; border-radius: 14px; font-weight: 800; font-size: 17px; text-decoration: none; border: 2px solid transparent; transition: transform .12s, background-color .15s; }
.btn:active { transform: scale(.98); }
.btn-small { min-height: 40px; padding: 0 16px; font-size: 15px; border-radius: 11px; }
.btn-red { background: var(--red); color: var(--white); }
.btn-red:hover { background: var(--red-deep); }
.btn-ink { background: var(--ink); color: var(--white); }
.btn-line { border-color: var(--ink); color: var(--ink); background: var(--white); }
.btn-line:hover { background: var(--ground); }
.btn-white { background: var(--white); color: var(--ink); }
.wa-icon { width: 21px; height: 21px; flex: none; }
.no-wa .wa-icon { display: none; }

/* hero */
.hero { padding: 48px 0 72px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 48px; align-items: center; }
h1 { font-weight: 900; font-size: clamp(42px, 6.6vw, 78px); line-height: 1.02; letter-spacing: -0.03em; }
html[lang="zh"] h1 { letter-spacing: 0; line-height: 1.18; font-size: clamp(38px, 5.6vw, 66px); }
.lead { margin-top: 24px; font-size: 19px; color: var(--muted); max-width: 34em; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.note { margin-top: 16px; font-weight: 800; color: var(--red-deep); }
.hero-stage { position: relative; justify-self: center; width: min(100%, 360px); padding: 0 0 40px 0; }
.phone { width: 270px; margin-left: auto; aspect-ratio: 9 / 16; border-radius: 34px; border: 9px solid var(--ink); overflow: hidden; background: var(--ink); }
.phone img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.ticket { position: absolute; left: -36px; bottom: 0; width: 210px; background: var(--white); border-radius: 16px; box-shadow: 0 18px 40px -12px rgba(27,36,48,.35), 0 0 0 1px rgba(27,36,48,.06); padding: 8px; }
.ticket-img { border-radius: 10px; }
.ticket-bell { position: absolute; top: -22px; right: -16px; border-radius: 12px; box-shadow: 0 6px 16px -4px rgba(198,55,32,.55); }
@media (prefers-reduced-motion: no-preference) {
  .ticket { animation: ticket-in .7s cubic-bezier(.2,.9,.3,1.2) 1.1s both; }
  .ticket-bell { animation: ding 1s ease-in-out 1.7s both; transform-origin: 50% 20%; }
}
@keyframes ticket-in { from { opacity: 0; transform: translate(40px, 30px); } to { opacity: 1; transform: none; } }
@keyframes ding { 0%,100% { transform: rotate(0); } 15% { transform: rotate(-16deg); } 35% { transform: rotate(13deg); } 55% { transform: rotate(-8deg); } 75% { transform: rotate(4deg); } }

/* how: the flow animation */
.how { background: var(--ground); padding: 80px 0; }
.how-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; }
.flow-toggle { font: inherit; font-size: 15px; font-weight: 800; display: inline-flex; align-items: center; gap: 6px; min-height: 40px; padding: 0 14px 0 10px; border-radius: 11px; border: 0; background: var(--white); color: var(--ink); cursor: pointer; box-shadow: 0 0 0 1px var(--line); flex: none; }
.flow-toggle[hidden] { display: none; }
.flow-ctrls { display: flex; gap: 8px; flex: none; }
.flow-sound .i-sound, .flow-sound .t-on, .flow-sound[aria-pressed="true"] .i-mute, .flow-sound[aria-pressed="true"] .t-off { display: none; }
.flow-sound[aria-pressed="true"] .i-sound, .flow-sound[aria-pressed="true"] .t-on { display: inline; }
.flow-sound[aria-pressed="true"] { background: var(--ink); color: var(--white); box-shadow: none; }
.flow-toggle svg { width: 20px; height: 20px; }
.flow-toggle .i-play, .flow-toggle .t-play, .flow-toggle[aria-pressed="true"] .i-pause, .flow-toggle[aria-pressed="true"] .t-pause { display: none; }
.flow-toggle[aria-pressed="true"] .i-play, .flow-toggle[aria-pressed="true"] .t-play { display: inline; }

.flow {
  --s-blue: #2f6fed; --s-green: #12a150; --s-amber: #f5a300; --s-purple: #8e5bd9; --s-accent: #b8302c; --s-muted: #6b7480;
  position: relative; margin-top: 40px; display: flex; justify-content: center; align-items: center; gap: 36px;
  font-family: "Barlow", system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; font-weight: 500; line-height: 1.25;
}
.flow b { font-weight: 700; }
.flow i, .flow em, .flow u { font-style: normal; text-decoration: none; }
.dev { display: flex; flex-direction: column; align-items: center; gap: 12px; transition: opacity .4s; }
.dev-cap { font-family: var(--font); font-weight: 800; font-size: 15px; color: var(--muted); transition: color .3s; }
.scr { position: relative; overflow: hidden; background: var(--ground); border: 8px solid var(--ink); box-shadow: 0 24px 50px -24px rgba(27,36,48,.45); }
.scr-phone { width: 248px; height: 500px; border-radius: 32px; }
.scr-tablet { width: 420px; height: 336px; border-radius: 22px; border-width: 10px; }
.flow[data-step="1"] .dev-guest .dev-cap,
.flow[data-step="2"] .dev-kitchen .dev-cap,
.flow[data-step="3"] .dev-waiter .dev-cap,
.flow[data-step="4"] .dev-waiter .dev-cap { color: var(--red-deep); }

/* guest phone */
.g-head { display: flex; align-items: center; gap: 9px; padding: 16px 14px 12px; background: var(--white); }
.g-badge { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px; background: var(--s-accent); color: #fff; font-weight: 700; font-size: 17px; flex: none; }
.g-store { display: flex; flex-direction: column; min-width: 0; }
.g-store b { font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.g-store i { font-size: 12.5px; font-weight: 700; color: var(--s-accent); }
.g-list { list-style: none; margin: 10px 10px 0; padding: 0; background: var(--white); border-radius: 14px; }
.g-list li { display: flex; align-items: center; gap: 10px; padding: 10px; }
.g-list li + li { border-top: 1px solid var(--line); }
.g-list img { width: 58px; height: 58px; border-radius: 10px; object-fit: cover; flex: none; }
.g-name { display: flex; flex-direction: column; min-width: 0; flex: 1; }
.g-name b { font-size: 14px; }
.g-name i { font-size: 12.5px; color: var(--s-muted); }
.g-name em { font-size: 11px; color: var(--ink); font-weight: 600; margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: none; }
.g-name u { font-size: 14px; font-weight: 700; margin-top: 3px; }
.g-add { position: relative; display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--s-accent); color: #fff; flex: none; transition: transform .2s, background-color .2s; }
.g-add svg { width: 19px; height: 19px; transition: opacity .15s; }
.g-qty { position: absolute; inset: 0; display: grid; place-items: center; font-weight: 700; font-size: 16px; opacity: 0; transition: opacity .15s; }
.g-list li.in .g-add { background: var(--ink); }
.g-list li.in .g-add svg { opacity: 0; }
.g-list li.in .g-qty { opacity: 1; }
.g-list li.in .g-name em { display: block; }
.g-bar { position: absolute; left: 10px; right: 10px; bottom: 12px; height: 50px; display: flex; align-items: center; gap: 10px; padding: 0 14px; border-radius: 14px; background: var(--s-accent); color: #fff; font-weight: 700; font-size: 14px; transform: translateY(80px); transition: transform .35s cubic-bezier(.2,.9,.3,1.1); }
.g-bar.show { transform: none; }
.g-bar > span:first-child { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.g-sum { margin-left: auto; flex: none; }
.g-toast, .w-toast { position: absolute; left: 12px; right: 12px; top: 12px; display: flex; align-items: center; gap: 8px; padding: 11px 12px; border-radius: 12px; background: var(--ink); color: #fff; font-size: 13px; font-weight: 600; opacity: 0; transform: translateY(-10px); transition: opacity .25s, transform .25s; }
.g-toast svg, .w-toast svg { width: 18px; height: 18px; flex: none; color: #5ad08b; }
.g-toast.show, .w-toast.show { opacity: 1; transform: none; }

/* kitchen tablet */
.k-head { display: flex; align-items: center; gap: 8px; height: 46px; padding: 0 14px; background: var(--white); border-bottom: 1px solid var(--line); }
.k-head svg { width: 22px; height: 22px; }
.k-head b { font-size: 16px; }
.k-bell { position: relative; margin-left: auto; width: 34px; height: 34px; }
.k-bell img { border-radius: 9px; position: relative; z-index: 1; transform-origin: 50% 20%; }
.k-bell i { position: absolute; inset: 0; border-radius: 12px; border: 2px solid var(--red); opacity: 0; }
.k-bell.ring img { animation: ding 1s ease-in-out; }
.k-bell.ring i { animation: ring 1s ease-out; }
.k-bell.ring i + i { animation-delay: .25s; }
@keyframes ring { from { opacity: .8; transform: scale(1); } to { opacity: 0; transform: scale(2.1); } }
.k-body { padding: 14px; display: grid; place-items: start center; }
.k-ticket { width: 100%; max-width: 330px; background: var(--white); border-radius: 12px; overflow: hidden; opacity: 0; transform: translateY(-24px) scale(.96); transition: opacity .3s, transform .45s cubic-bezier(.2,.9,.3,1.25); }
.k-ticket.show { opacity: 1; transform: none; }
.k-top { display: flex; justify-content: space-between; align-items: baseline; padding: 7px 12px; background: var(--s-blue); color: #fff; transition: background-color .3s; }
.k-top b { font-size: 17px; }
.k-top span { font-size: 12.5px; font-weight: 700; }
.k-ticket.ready .k-top { background: var(--s-green); }
.k-lines { list-style: none; margin: 0; padding: 2px 12px; font-size: 13.5px; font-weight: 600; }
.k-lines li { padding: 5px 0; }
.k-lines li + li { border-top: 1px solid var(--line); }
.k-lines em { display: block; font-size: 11.5px; font-weight: 600; color: var(--s-muted); }
.k-btn, .w-btn { display: grid; place-items: center; height: 38px; margin: 4px 10px 10px; border-radius: 10px; background: var(--ink); color: #fff; font-weight: 700; font-size: 14px; text-align: center; padding: 0 8px; }
.k-ready { background: var(--s-green); display: none; }
.k-wait { display: none; margin: 4px 10px 10px; padding: 9px 8px; border-radius: 10px; background: #e3f5ea; color: #0b6b35; font-size: 12.5px; font-weight: 700; text-align: center; }
.k-ticket.cooking .k-start { display: none; }
.k-ticket.cooking .k-ready { display: grid; }
.k-ticket.ready .k-start, .k-ticket.ready .k-ready { display: none; }
.k-ticket.ready .k-wait { display: block; }

/* waiter phone */
.w-head { height: 50px; display: flex; align-items: center; padding: 0 16px; background: var(--white); border-bottom: 1px solid var(--line); font-size: 16px; }
.w-tiles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; padding: 12px; }
.w-tile { position: relative; height: 66px; border-radius: 12px; background: var(--white); box-shadow: inset 0 0 0 1px var(--line); padding: 7px 9px; display: flex; flex-direction: column; justify-content: space-between; transition: background-color .3s, color .3s; }
.w-tile b { font-size: 20px; line-height: 1; }
.w-tile i { font-size: 11px; font-weight: 700; line-height: 1.1; color: var(--s-muted); }
.w-tile.dining { background: var(--s-blue); box-shadow: none; color: #fff; }
.w-tile.ready { background: var(--s-green); box-shadow: none; color: #fff; }
.w-tile.bill { background: var(--s-amber); box-shadow: none; color: var(--ink); }
.w-tile.paid { background: var(--s-purple); box-shadow: none; color: #fff; }
.w-tile.dining i, .w-tile.ready i, .w-tile.paid i { color: rgba(255,255,255,.88); }
.w-tile.bill i { color: var(--ink); }
.w-five i { display: none; }
.w-five.dining .s-dining, .w-five.ready .s-ready, .w-five.bill .s-bill, .w-five.paid .s-paid, .w-five.free .s-free { display: block; }
.w-five.pop { animation: pop .45s ease-out; }
@keyframes pop { 40% { transform: scale(1.1); } }
.w-card, .w-bill { position: absolute; left: 10px; right: 10px; bottom: 12px; background: var(--white); border-radius: 14px; overflow: hidden; box-shadow: 0 10px 30px -12px rgba(27,36,48,.35); transform: translateY(calc(100% + 20px)); transition: transform .4s cubic-bezier(.2,.9,.3,1.05); }
.w-card.show, .w-bill.show { transform: none; }
.w-card { border-left: 6px solid var(--s-green); }
.w-card-top { display: flex; justify-content: space-between; align-items: baseline; padding: 11px 12px 4px; }
.w-card-top b { font-size: 16px; }
.w-card-top span { font-size: 12px; font-weight: 700; color: var(--s-green); }
.w-card ul { list-style: none; margin: 0; padding: 0 12px 6px; font-size: 13.5px; }
.w-card li { padding: 3px 0; }
.w-bill dl { margin: 0; padding: 2px 12px 4px; font-size: 13.5px; }
.w-bill dl div { display: flex; justify-content: space-between; padding: 3px 0; }
.w-bill dt { color: var(--s-muted); }
.w-bill dd { margin: 0; font-weight: 600; }
.w-bill .w-total { border-top: 1px solid var(--line); margin-top: 4px; padding-top: 7px; font-size: 17px; }
.w-bill .w-total dt { color: var(--ink); font-weight: 700; }
.w-bill .w-total dd { font-weight: 700; }
.w-btn { height: auto; min-height: 40px; line-height: 1.2; padding: 6px 10px; font-size: 13.5px; }
.w-reset { display: none; }
.w-bill.paid .w-pay { display: none; }
.w-bill.paid .w-reset { display: grid; }

/* the order travelling between screens, and the tapping finger */
.fly { position: absolute; left: 0; top: 0; z-index: 4; display: flex; align-items: center; gap: 8px; padding: 7px 8px 7px 12px; border-radius: 11px; background: var(--white); box-shadow: 0 10px 24px -8px rgba(27,36,48,.45), 0 0 0 1px rgba(27,36,48,.06); font-size: 14px; opacity: 0; pointer-events: none; }
.fly span { display: grid; place-items: center; min-width: 24px; height: 24px; border-radius: 7px; background: var(--s-accent); color: #fff; font-weight: 700; font-size: 13px; }
.fly.go { opacity: 1; transition: transform .75s cubic-bezier(.55,0,.25,1), opacity .2s; }
.finger { position: absolute; left: 0; top: 0; z-index: 5; width: 40px; height: 40px; margin: -20px 0 0 -20px; border-radius: 50%; background: rgba(27,36,48,.28); border: 3px solid rgba(255,255,255,.95); box-shadow: 0 4px 14px rgba(27,36,48,.35); opacity: 0; pointer-events: none; transition: translate .55s cubic-bezier(.4,0,.2,1), opacity .25s; }
.finger.show { opacity: 1; }
.finger.tap { animation: tap .35s ease-out; }
@keyframes tap { 0% { scale: 1; } 45% { scale: .72; background: rgba(27,36,48,.45); } 100% { scale: 1; } }
.flow.instant *, .flow.instant { transition: none !important; animation: none !important; }

/* the four steps under the screens */
.flow-caption { display: none; }
.steps { list-style: none; padding: 0; margin: 40px 0 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; }
.steps button { all: unset; box-sizing: border-box; cursor: pointer; display: grid; grid-template-columns: auto minmax(0, 1fr); column-gap: 10px; width: 100%; border-radius: 10px; }
.steps button:focus-visible { outline: 3px solid var(--red); outline-offset: 6px; }
.steps .num { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--line); color: var(--muted); font-size: 15px; font-weight: 900; transition: background-color .3s, color .3s; }
.steps .st b { display: block; font-size: 20px; font-weight: 900; line-height: 1.3; color: var(--muted); transition: color .3s; }
.steps .sp { display: block; margin-top: 6px; color: var(--muted); font-size: 16px; }
.steps .bar { grid-column: 1 / -1; order: -1; height: 3px; border-radius: 2px; background: var(--line); margin-bottom: 16px; overflow: hidden; }
.steps .bar span { display: block; height: 100%; width: 100%; background: var(--red); transform: scaleX(0); transform-origin: left; }
.steps button[aria-current="step"] .num { background: var(--red); color: var(--white); }
.steps button[aria-current="step"] .st b { color: var(--ink); }
.steps button.done .bar span { transform: none; }
.steps button:hover .st b { color: var(--ink); }
.flow-staff { margin-top: 32px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 16px; }

/* why */
.why { padding: 88px 0; }
.why-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 48px; }
.points { margin: 0; }
.points div { padding: 20px 0; border-top: 1px solid var(--line); }
.points div:last-child { border-bottom: 1px solid var(--line); }
.points dt { font-weight: 900; font-size: 21px; }
.points dd { margin: 4px 0 0; color: var(--muted); }

/* demo */
.demo { background: var(--red); color: var(--white); padding: 72px 0; }
.demo-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 48px; align-items: center; }
.demo p { margin: 16px 0 28px; font-size: 19px; max-width: 32em; color: rgba(255,255,255,.92); }
.qr { margin: 0; background: var(--white); color: var(--ink); padding: 18px 18px 12px; border-radius: 18px; text-align: center; font-weight: 800; font-size: 15px; }
.qr figcaption { margin-top: 8px; }

/* price */
.price { padding: 88px 0; }
.price-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 48px; }
.amount { display: flex; align-items: flex-start; gap: 6px; font-weight: 900; line-height: .9; }
.cur { font-size: 34px; padding-top: 10px; }
.fig { font-size: clamp(96px, 14vw, 150px); letter-spacing: -0.04em; }
.per { font-weight: 800; font-size: 20px; margin-top: 6px; }
.incl { list-style: none; padding: 0; margin: 28px 0 0; }
.incl li { padding: 16px 0; border-top: 1px solid var(--line); color: var(--muted); }
.incl li:last-child { border-bottom: 1px solid var(--line); }
.incl strong { color: var(--ink); font-weight: 900; }
.price-cta { margin-top: 28px; }
@media (min-width: 901px) {
  .why-grid > h2, .price-grid > h2, .faq-grid > h2 { position: sticky; top: 100px; align-self: start; }
}

/* faq */
.faq { background: var(--ground); padding: 88px 0; }
.faq-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 48px; }
.qa details { border-top: 1px solid var(--line); }
.qa details:last-child { border-bottom: 1px solid var(--line); }
.qa summary { list-style: none; cursor: pointer; padding: 18px 40px 18px 0; font-weight: 800; font-size: 18px; position: relative; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: ""; position: absolute; right: 6px; top: 50%; width: 12px; height: 12px; border-right: 3px solid var(--ink); border-bottom: 3px solid var(--ink); transform: translateY(-70%) rotate(45deg); transition: transform .2s; }
.qa details[open] summary::after { transform: translateY(-30%) rotate(-135deg); }
.qa p { padding: 0 0 20px; color: var(--muted); max-width: 36em; }

/* contact */
.contact { padding: 96px 0; }
.contact-box { display: flex; flex-direction: column; align-items: center; text-align: center; }
.contact-icon { border-radius: 18px; margin-bottom: 22px; }
.contact h2 { max-width: 18ch; }
.contact p { margin: 16px 0 28px; color: var(--muted); font-size: 19px; max-width: 30em; }

/* footer */
.foot { border-top: 1px solid var(--line); padding: 28px 0 32px; font-size: 15px; color: var(--muted); }
.foot-row { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.foot a { text-decoration: none; }
.foot a:hover { text-decoration: underline; }

/* mobile dock */
.dock { display: none; }

@media (max-width: 900px) {
  .hero-grid, .why-grid, .price-grid, .faq-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .hero { padding: 28px 0 56px; }
  .hero-stage { width: 300px; margin-top: 8px; }
  .phone { width: 230px; }
  .ticket { width: 175px; left: -10px; }
  .flow { margin-top: 28px; display: grid; justify-items: center; align-items: center; gap: 0; }
  .dev { grid-area: 1 / 1; opacity: 0; visibility: hidden; transition: opacity .35s, visibility 0s .35s; }
  .flow[data-step="1"] .dev-guest, .flow[data-step="2"] .dev-kitchen, .flow[data-step="3"] .dev-waiter, .flow[data-step="4"] .dev-waiter { opacity: 1; visibility: visible; transition: opacity .35s; }
  .scr-tablet { width: min(420px, calc(100vw - 40px)); }
  .steps { gap: 10px; margin-top: 24px; }
  .steps button { grid-template-columns: minmax(0, 1fr); row-gap: 6px; }
  .steps .sp { display: none; }
  .steps .st b { font-size: 14px; line-height: 1.25; }
  .steps .num { width: 24px; height: 24px; font-size: 13px; }
  .steps .bar { margin-bottom: 8px; }
  .flow-caption { display: block; margin-top: 18px; min-height: 5.2em; color: var(--muted); }
  .flow-staff { margin-top: 12px; }
  .demo-grid { grid-template-columns: minmax(0, 1fr); }
  .qr { display: none; }
  .how, .why, .price, .faq { padding: 64px 0; }
  .contact { padding: 72px 0 120px; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .how-head { flex-wrap: wrap; align-items: flex-start; gap: 16px; }
  .how-head h2 { flex: 1 1 100%; }
  .top-wa, .zh-name { display: none; }
  .lead, .demo p, .contact p { font-size: 17px; }
  .cta-row .btn { flex: 1 1 100%; }
  .dock { display: flex; gap: 10px; position: fixed; left: 0; right: 0; bottom: 0; z-index: 30; padding: 10px 16px calc(10px + env(safe-area-inset-bottom)); background: rgba(255,255,255,.96); border-top: 1px solid var(--line); transform: translateY(110%); transition: transform .25s; }
  .dock.show { transform: none; }
  .dock .btn { flex: 1; min-height: 48px; padding: 0 12px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .dock { transition: none; }
}

/* privacy and terms */
.legal { max-width: 760px; padding-top: 40px; padding-bottom: 72px; }
.legal h1 { font-size: clamp(34px, 5vw, 48px); }
.legal h2 { font-size: 23px; max-width: none; margin: 36px 0 10px; }
.legal p, .legal li { color: #3d4652; }
.legal p + p { margin-top: 12px; }
.legal ul { padding-left: 22px; margin: 10px 0 0; }
.legal li + li { margin-top: 6px; }
.legal .updated { margin-top: 10px; color: var(--muted); font-weight: 600; }
.legal .lang-note { margin-top: 6px; color: var(--muted); font-size: 15px; }
.legal mark { background: #ffe9a8; padding: 0 3px; border-radius: 3px; }

html[lang="zh"] .contact h2 { max-width: 17em; }