/* UpClean.ai — industrial light theme */
:root {
  --paper: #EEF0F3;
  --panel: #FFFFFF;
  --ink: #12161C;
  --ink-2: #2B333D;
  --muted: #5B6676;
  --rule: #D3D8DF;
  --rule-2: #E4E8ED;
  --graphite: #151A21;
  --graphite-2: #1C232C;
  --g-rule: #2C3541;
  --on-dark: #E9EDF2;
  --on-dark-muted: #9AA6B5;
  --red: #E10600;
  --red-dark: #B80500;
  --turf: #1C9A57;
  --turf-bright: #2FBF73;
  --amber: #D98A00;
  --display: "Archivo", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --body: "IBM Plex Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --wrap: 1200px;
  --r: 4px;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.6 var(--body); -webkit-font-smoothing: antialiased; }
html[lang="zh-CN"] body { line-height: 1.75; }
img, svg { max-width: 100%; display: block; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; }
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }
.skip { position: absolute; left: 12px; top: -48px; background: var(--ink); color: #fff; padding: 8px 14px; z-index: 100; }
.skip:focus { top: 12px; }

/* Type */
h1, h2, h3 { font-family: var(--display); margin: 0; font-weight: 700; letter-spacing: -.02em; color: inherit; }
h1 { font-size: clamp(38px, 5vw, 64px); line-height: 1.02; font-stretch: 110%; }
h2 { font-size: clamp(30px, 3.4vw, 44px); line-height: 1.08; font-stretch: 106%; }
h3 { font-size: 20px; line-height: 1.3; font-weight: 600; letter-spacing: -.01em; }
html[lang="zh-CN"] h1 { line-height: 1.2; letter-spacing: 0; }
html[lang="zh-CN"] h2 { line-height: 1.28; letter-spacing: 0; }
p { margin: 0 0 1em; }
.lede { font-size: 19px; color: var(--muted); max-width: 62ch; }
.small { font-size: 14px; }
.num { font-family: var(--display); font-stretch: 112%; font-variant-numeric: tabular-nums; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font: 600 16px/1 var(--body); padding: 15px 22px; border-radius: var(--r); text-decoration: none; cursor: pointer; border: 1.5px solid transparent; transition: background .15s, border-color .15s, color .15s; }
.btn-primary { background: var(--red); color: #fff; }
.btn-primary:hover { background: var(--red-dark); }
.btn-ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--ink); color: #fff; }
.dark .btn-ghost { border-color: var(--on-dark-muted); color: var(--on-dark); }
.dark .btn-ghost:hover { background: var(--on-dark); color: var(--ink); border-color: var(--on-dark); }
.btn-sm { padding: 10px 14px; font-size: 14px; }
.link { color: var(--ink); text-decoration: none; font-weight: 600; border-bottom: 2px solid var(--red); padding-bottom: 1px; }
.link:hover { color: var(--red); }
.dark .link { color: var(--on-dark); }

/* Header */
.site-header { position: sticky; top: 0; z-index: 40; background: rgba(255,255,255,.94); backdrop-filter: blur(10px); border-bottom: 1px solid var(--rule); }
.nav { display: flex; align-items: center; gap: 28px; height: 70px; }
.brand { display: block; flex: none; }
.brand img { height: 32px; width: auto; }
.nav-links { display: flex; gap: 2px; list-style: none; margin: 0; padding: 0; flex: 1; }
.nav-links > li { position: relative; }
.nav-links a, .nav-trigger { display: block; padding: 8px 12px; font: 500 15px/1.6 var(--body); color: var(--ink-2); text-decoration: none; background: none; border: 0; cursor: pointer; }
.nav-links a:hover, .nav-trigger:hover { color: var(--red); }
.nav-links > li > a[aria-current="page"] { box-shadow: inset 0 -2px 0 var(--red); }
.dropdown { position: absolute; top: calc(100% + 10px); left: 0; min-width: 360px; background: var(--panel); border: 1px solid var(--rule); border-top: 2px solid var(--red); padding: 8px; display: none; box-shadow: 0 12px 30px rgba(18,22,28,.12); }
.has-dd:hover .dropdown, .has-dd:focus-within .dropdown { display: block; }
.has-dd::after { content: ""; position: absolute; left: 0; right: 0; top: 100%; height: 12px; }
.dropdown a { padding: 12px; }
.dropdown a:hover { background: var(--paper); color: var(--ink); }
.dropdown strong { display: block; color: var(--ink); font-weight: 600; font-size: 15px; }
.dropdown span { font-size: 13px; color: var(--muted); }
.flag { display: inline-block; font-size: 11px; font-weight: 600; color: var(--red); border: 1px solid var(--red); padding: 0 6px; border-radius: 2px; margin-left: 6px; vertical-align: 2px; }
.nav-cta { display: flex; align-items: center; gap: 10px; }
.lang { font-size: 14px; color: var(--ink-2); text-decoration: none; padding: 8px 10px; border: 1px solid var(--rule); border-radius: var(--r); }
.lang:hover { border-color: var(--ink); }
.menu-btn { display: none; margin-left: auto; background: none; border: 1px solid var(--rule); color: var(--ink); padding: 8px 12px; border-radius: var(--r); font: 500 14px var(--body); }
@media (max-width: 1100px) {
  .menu-btn { display: block; }
  .nav { gap: 12px; }
  .nav-links, .nav-cta .signin { display: none; }
  .nav-open .nav-links { display: flex; flex-direction: column; position: absolute; top: 70px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--rule); padding: 12px 28px 20px; }
  .nav-open .dropdown { display: block; position: static; min-width: 0; border: 0; box-shadow: none; padding: 0 0 0 12px; }
  .nav-open .has-dd::after { display: none; }
}
@media (max-width: 600px) { .nav-cta .btn { display: none; } .brand img { height: 26px; } }

/* Sections & surfaces */
section { padding: 104px 0; }
.white { background: var(--panel); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.dark { background: var(--graphite); color: var(--on-dark); position: relative; }
.dark .lede, .dark p { color: var(--on-dark-muted); }
.grid-bg { background-image: linear-gradient(var(--rule-2) 1px, transparent 1px), linear-gradient(90deg, var(--rule-2) 1px, transparent 1px); background-size: 32px 32px; }
.dark.grid-bg { background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px); }
.sec-head { max-width: 780px; margin-bottom: 56px; }
.sec-head h2 + p { margin-top: 18px; }
.kicker { display: inline-flex; align-items: center; gap: 10px; color: var(--red); font-weight: 600; font-size: 15px; margin-bottom: 16px; }
.kicker::before { content: ""; width: 18px; height: 2px; background: currentColor; }
.dark .kicker { color: #FF4B44; }

/* Crop-mark frame: technical drawing feel */
.frame { position: relative; }
.frame::before, .frame::after { content: ""; position: absolute; width: 14px; height: 14px; border-color: var(--ink); border-style: solid; pointer-events: none; }
.frame::before { top: -7px; left: -7px; border-width: 1.5px 0 0 1.5px; }
.frame::after { bottom: -7px; right: -7px; border-width: 0 1.5px 1.5px 0; }
.dark .frame::before, .dark .frame::after { border-color: var(--on-dark-muted); }

/* Hero */
.hero { padding: 76px 0 0; background-color: var(--paper); position: relative; }
.hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, var(--paper) 100%); pointer-events: none; }
.hero .wrap { position: relative; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: center; }
.badge { display: inline-flex; align-items: center; gap: 10px; font-size: 13px; font-weight: 600; color: var(--ink-2); background: var(--panel); border: 1px solid var(--rule); padding: 6px 12px 6px 8px; border-radius: 2px; margin-bottom: 28px; }
.badge img { width: 16px; height: 16px; }
.hero h1 { margin-bottom: 26px; }
.hero h1 .line2 { display: block; color: var(--muted); font-weight: 500; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.plot { background: var(--panel); border: 1px solid var(--rule); padding: 14px; box-shadow: 0 24px 50px -24px rgba(18,22,28,.35); }
.plot-head, .plot-foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; font-size: 13px; color: var(--muted); padding: 2px 2px 12px; }
.plot-head .coord { font-variant-numeric: tabular-nums; }
.plot-foot { padding: 14px 2px 2px; margin-top: 14px; border-top: 1px solid var(--rule); }
.plot-foot div { display: flex; flex-direction: column; }
.plot-foot b { color: var(--ink); font: 600 21px var(--display); font-stretch: 112%; font-variant-numeric: tabular-nums; }
.live { display: inline-flex; align-items: center; gap: 7px; color: var(--turf); font-weight: 600; }
.pulse { position: relative; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.pulse::after { content: ""; position: absolute; inset: 0; border-radius: 50%; background: currentColor; animation: pulse 2.4s ease-out infinite; }
@keyframes pulse { 0% { transform: scale(1); opacity: .6; } 100% { transform: scale(3.2); opacity: 0; } }
.stripe { transform-box: fill-box; transform-origin: top; animation: mow .55s linear both; }
.stripe.up { transform-origin: bottom; }
@keyframes mow { from { transform: scaleY(0); } to { transform: scaleY(1); } }
.trust-bar { margin-top: 72px; border-top: 1px solid var(--rule); padding: 22px 0 26px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.trust-bar div { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--ink-2); font-weight: 500; }
.trust-bar svg { flex: none; color: var(--ink); }
@media (max-width: 960px) { .hero-grid { grid-template-columns: 1fr; gap: 44px; } .trust-bar { grid-template-columns: 1fr 1fr; } }

/* Audience doors */
.doors { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--rule); background: var(--panel); }
.door { padding: 40px; display: flex; flex-direction: column; text-decoration: none; position: relative; transition: background .15s; }
.door + .door { border-left: 1px solid var(--rule); }
.door:hover { background: #F7F8FA; }
.door .who { font-size: 14px; font-weight: 600; color: var(--red); margin-bottom: 14px; }
.door h3 { font-size: 26px; font-stretch: 106%; margin-bottom: 12px; }
.door p { color: var(--muted); margin-bottom: 22px; }
.door ul { list-style: none; padding: 0; margin: 0 0 28px; display: grid; gap: 8px; font-size: 15px; color: var(--ink-2); }
.door li { padding-left: 18px; position: relative; }
.door li::before { content: ""; position: absolute; left: 0; top: .72em; width: 8px; height: 2px; background: var(--red); }
.door .go { margin-top: auto; font-weight: 600; border-bottom: 2px solid var(--red); align-self: flex-start; }
@media (max-width: 860px) { .doors { grid-template-columns: 1fr; } .door + .door { border-left: 0; border-top: 1px solid var(--rule); } .door { padding: 30px; } }

/* Product drawing */
.drawing { background-color: var(--panel); border: 1px solid var(--rule); padding: 28px 28px 18px; }
.drawing figcaption { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px; color: var(--muted); border-top: 1px solid var(--rule); padding-top: 14px; margin-top: 8px; }
.callout-label { font: 600 14px var(--body); fill: var(--ink); }
.callout-sub { font: 400 12.5px var(--body); fill: var(--muted); }
.pillars { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 48px; border-top: 2px solid var(--ink); }
.pillar { padding: 26px 24px 0 0; }
.pillar + .pillar { padding-left: 24px; border-left: 1px solid var(--rule); }
.pillar .ico { color: var(--red); margin-bottom: 16px; }
.pillar h3 { margin-bottom: 8px; font-size: 19px; }
.pillar p { color: var(--muted); font-size: 15.5px; margin: 0 0 14px; }
.pillar .stat { display: inline-block; font-size: 13px; font-weight: 600; color: var(--ink); border: 1px solid var(--rule); background: var(--paper); padding: 3px 9px; border-radius: 2px; }
@media (max-width: 960px) { .pillars { grid-template-columns: 1fr 1fr; row-gap: 32px; } .pillar:nth-child(3) { padding-left: 0; border-left: 0; } }
@media (max-width: 560px) { .pillars { grid-template-columns: 1fr; } .pillar + .pillar { padding-left: 0; border-left: 0; border-top: 1px solid var(--rule); padding-top: 24px; } }

/* FleetOS */
.os-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 64px; align-items: center; }
.dash { border: 1px solid var(--g-rule); background: var(--graphite-2); font-size: 13px; color: var(--on-dark); }
.dash-top { display: flex; align-items: center; gap: 8px; padding: 11px 14px; border-bottom: 1px solid var(--g-rule); color: var(--on-dark-muted); }
.dash-top img { width: 14px; height: 14px; }
.dash-top .sync { margin-left: auto; display: inline-flex; gap: 6px; align-items: center; color: var(--turf-bright); }
.dash-body { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--g-rule); }
.dash-cell { background: var(--graphite-2); padding: 16px; }
.dash-cell.wide { grid-column: span 2; }
.dash-cell .lbl { color: var(--on-dark-muted); margin-bottom: 6px; }
.dash-cell .val { font: 600 27px var(--display); font-stretch: 112%; font-variant-numeric: tabular-nums; color: #fff; }
.unit-row { display: grid; grid-template-columns: 1fr auto auto; gap: 14px; padding: 8px 0; border-top: 1px solid var(--g-rule); align-items: center; }
.unit-row:first-of-type { border-top: 0; }
.unit-row .muted { color: var(--on-dark-muted); }
.st { font-size: 12px; padding: 2px 8px; border-radius: 2px; font-weight: 600; }
.st.on { color: var(--turf-bright); background: rgba(47,191,115,.13); }
.st.hold { color: #F2B544; background: rgba(242,181,68,.13); }
.st.dock { color: #C5CED9; background: rgba(197,206,217,.12); }
.bar { height: 6px; background: #0F1318; overflow: hidden; width: 90px; }
.bar b { display: block; height: 100%; background: var(--turf-bright); }
.moats { display: grid; gap: 28px; }
.moat { padding-left: 20px; border-left: 2px solid var(--g-rule); }
.moat:first-child { border-left-color: var(--red); }
.moat h3 { margin-bottom: 6px; color: #fff; }
.moat p { margin: 0; }
.light-moats .moat { border-left-color: var(--rule); }
.light-moats .moat:first-child { border-left-color: var(--red); }
.light-moats .moat h3 { color: var(--ink); }
.light-moats .moat p { color: var(--muted); }
@media (max-width: 960px) { .os-grid { grid-template-columns: 1fr; } }

/* Flow */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--rule); background: var(--panel); }
.flow > div { padding: 26px; border-right: 1px solid var(--rule); }
.flow > div:last-child { border-right: 0; }
.flow .step { font: 700 14px var(--display); font-stretch: 112%; color: var(--red); }
.flow h3 { font-size: 17px; margin: 10px 0 6px; }
.flow p { font-size: 14.5px; color: var(--muted); margin: 0; }
.flow .blocked { margin-top: 12px; font-size: 13px; font-weight: 600; color: var(--red); }
@media (max-width: 960px) { .flow { grid-template-columns: 1fr 1fr; } .flow > div:nth-child(2) { border-right: 0; } .flow > div:nth-child(-n+2) { border-bottom: 1px solid var(--rule); } }
@media (max-width: 560px) { .flow { grid-template-columns: 1fr; } .flow > div { border-right: 0; border-bottom: 1px solid var(--rule); } }

/* Timeline */
.timeline { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); position: relative; }
.timeline::before { content: ""; position: absolute; left: 0; right: 0; top: 13px; height: 2px; background: linear-gradient(90deg, var(--red) 0 25%, var(--ink) 25% 50%, var(--rule) 50%); }
.timeline li { padding-right: 24px; position: relative; }
.timeline .dot { width: 28px; height: 28px; border: 2px solid var(--rule); background: var(--paper); display: grid; place-items: center; font: 700 12px var(--display); color: var(--muted); position: relative; }
.timeline .active .dot { border-color: var(--red); background: var(--red); color: #fff; }
.timeline .pilot .dot { border-color: var(--ink); color: var(--ink); }
.timeline .phase { display: block; margin: 20px 0 8px; font-size: 13px; font-weight: 600; color: var(--muted); }
.timeline .active .phase { color: var(--red); }
.timeline .pilot .phase { color: var(--ink); }
.timeline h3 { margin-bottom: 8px; }
.timeline p { color: var(--muted); font-size: 15px; }
@media (max-width: 960px) {
  .timeline { grid-template-columns: 1fr; gap: 32px; padding-left: 44px; }
  .timeline::before { left: 13px; right: auto; top: 0; bottom: 0; width: 2px; height: auto; background: linear-gradient(180deg, var(--red) 0 25%, var(--ink) 25% 50%, var(--rule) 50%); }
  .timeline .dot { position: absolute; left: -44px; top: 0; }
  .timeline .phase { margin-top: 3px; }
}

/* Calculators */
.calc { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--rule); }
.calc-in { padding: 38px; background: var(--panel); }
.calc-out { padding: 38px; background: var(--graphite); color: var(--on-dark); display: flex; flex-direction: column; }
.field { margin-bottom: 26px; }
.field label { display: flex; justify-content: space-between; gap: 12px; font-weight: 500; margin-bottom: 10px; font-size: 15px; }
.field output { font: 600 16px var(--display); font-stretch: 112%; color: var(--red); font-variant-numeric: tabular-nums; }
input[type=range] { width: 100%; accent-color: var(--red); }
.field .hint { font-size: 13px; color: var(--muted); margin-top: 6px; }
.cmp { display: grid; gap: 16px; margin-bottom: 24px; }
.cmp-row .lbl { display: flex; justify-content: space-between; gap: 12px; font-size: 14px; color: var(--on-dark-muted); margin-bottom: 6px; }
.cmp-row .lbl b { color: #fff; font: 600 20px var(--display); font-stretch: 112%; font-variant-numeric: tabular-nums; }
.cmp-bar { height: 10px; background: rgba(255,255,255,.06); overflow: hidden; }
.cmp-bar i { display: block; height: 100%; transition: width .35s ease; }
.cmp-row.base i { background: #6B7686; }
.cmp-row.uc i { background: var(--turf-bright); }
.saving { margin-top: auto; padding-top: 22px; border-top: 1px solid var(--g-rule); }
.saving .big { font: 700 clamp(48px, 6vw, 76px)/1 var(--display); font-stretch: 118%; color: var(--turf-bright); font-variant-numeric: tabular-nums; }
.saving p { margin: 10px 0 0; color: var(--on-dark-muted); }
details.assume { margin-top: 18px; font-size: 13px; color: var(--muted); }
details.assume summary { cursor: pointer; color: var(--ink-2); font-weight: 500; }
@media (max-width: 960px) { .calc { grid-template-columns: 1fr; } }

/* Plans */
.plans { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 48px; }
.plan { border: 1px solid var(--rule); background: var(--panel); padding: 36px; display: flex; flex-direction: column; border-top: 3px solid var(--ink); }
.plan.feature { border-top-color: var(--red); }
.plan .who { font-size: 14px; font-weight: 600; color: var(--red); margin-bottom: 10px; }
.plan .for { color: var(--muted); font-size: 15px; margin: 8px 0 22px; }
.plan ul { list-style: none; padding: 0; margin: 0 0 28px; display: grid; gap: 11px; }
.plan li { display: grid; grid-template-columns: 20px 1fr; gap: 10px; font-size: 15px; }
.plan li::before { content: ""; width: 13px; height: 7px; border-left: 2px solid var(--red); border-bottom: 2px solid var(--red); transform: rotate(-45deg) translate(2px, 5px); }
.plan .btn { margin-top: auto; align-self: flex-start; }
.plan .price { font: 500 15px var(--display); color: var(--muted); margin-bottom: 20px; }
.plan .price b { color: var(--ink); font-size: 32px; font-weight: 700; font-stretch: 112%; }
@media (max-width: 760px) { .plans { grid-template-columns: 1fr; } }

/* Trust */
.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--g-rule); }
.trust-item { padding: 32px 32px 0 0; }
.trust-item + .trust-item { padding-left: 32px; border-left: 1px solid var(--g-rule); }
.trust-item .ico { color: #FF4B44; margin-bottom: 18px; }
.trust-item h3 { margin-bottom: 10px; color: #fff; }
.trust-item p { margin: 0; }
@media (max-width: 960px) { .trust-grid { grid-template-columns: 1fr; } .trust-item, .trust-item + .trust-item { padding: 28px 0; border-left: 0; border-bottom: 1px solid var(--g-rule); } }
.doc-list { border-top: 1px solid var(--rule); }
.doc { display: grid; grid-template-columns: 1fr auto; gap: 20px; align-items: center; padding: 20px 0; border-bottom: 1px solid var(--rule); }
.doc h3 { font-size: 18px; margin-bottom: 4px; }
.doc p { margin: 0; color: var(--muted); font-size: 15px; }

/* Generic */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
@media (max-width: 960px) { .split { grid-template-columns: 1fr; gap: 32px; } }
.page-hero { padding: 88px 0 76px; border-bottom: 1px solid var(--rule); }
.page-hero h1 { font-size: clamp(36px, 5vw, 58px); max-width: 20ch; margin-bottom: 22px; }
html[lang="zh-CN"] .page-hero h1 { max-width: 22em; }
.crumbs { font-size: 14px; color: var(--muted); margin-bottom: 20px; }
.crumbs a { color: var(--ink-2); text-decoration: none; }
.crumbs a:hover { color: var(--red); }
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.steps li { border-top: 2px solid var(--rule); padding-top: 18px; }
.steps li:first-child { border-top-color: var(--red); }
.steps .k { display: block; font: 700 15px var(--display); font-stretch: 112%; color: var(--red); margin-bottom: 8px; }
.steps h3 { margin-bottom: 8px; font-size: 18px; }
.steps p { color: var(--muted); font-size: 15px; margin: 0; }
@media (max-width: 960px) { .steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }
.uses { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--rule); background: var(--panel); }
.uses > div { padding: 26px; border-right: 1px solid var(--rule); }
.uses > div:last-child { border-right: 0; }
.uses h3 { font-size: 18px; margin-bottom: 8px; }
.uses p { font-size: 15px; color: var(--muted); margin: 0; }
.uses a { font-weight: 600; }
@media (max-width: 960px) { .uses { grid-template-columns: 1fr 1fr; } .uses > div:nth-child(2) { border-right: 0; } .uses > div:nth-child(-n+2) { border-bottom: 1px solid var(--rule); } }
@media (max-width: 560px) { .uses { grid-template-columns: 1fr; } .uses > div { border-right: 0; border-bottom: 1px solid var(--rule); } }
.faq { border-top: 1px solid var(--rule); }
.faq details { border-bottom: 1px solid var(--rule); padding: 20px 0; }
.faq summary { cursor: pointer; font-weight: 600; font-size: 18px; list-style: none; display: flex; justify-content: space-between; gap: 20px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--red); font-size: 24px; line-height: 1; }
.faq details[open] summary::after { content: "−"; }
.faq details p { color: var(--muted); margin: 12px 0 0; max-width: 70ch; }
.vert { display: grid; grid-template-columns: 220px 1fr auto; gap: 28px; padding: 32px 0; border-top: 1px solid var(--rule); align-items: start; }
.vert:last-child { border-bottom: 1px solid var(--rule); }
.vert .tag { font-size: 13px; font-weight: 600; color: var(--muted); }
.vert .tag.pilot { color: var(--ink); }
.vert h3 { margin-bottom: 8px; }
.vert p { color: var(--muted); margin: 0; max-width: 60ch; }
@media (max-width: 760px) { .vert { grid-template-columns: 1fr; gap: 10px; } }
.prose { max-width: 72ch; }
.prose h2 { font-size: 26px; margin: 40px 0 12px; }
.prose p { color: var(--muted); }
.note { border: 1px solid var(--rule); border-left: 3px solid var(--amber); padding: 16px 18px; color: var(--ink-2); font-size: 15px; background: var(--panel); }
.box { border: 1px solid var(--rule); background: var(--panel); padding: 32px; }
.checks { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 0; border-top: 1px solid var(--rule); }
.checks li { padding: 22px 24px 22px 0; border-bottom: 1px solid var(--rule); }
.checks li:nth-child(even) { padding-left: 24px; border-left: 1px solid var(--rule); }
.checks h3 { font-size: 18px; margin-bottom: 6px; }
.checks p { margin: 0; color: var(--muted); font-size: 15px; }
@media (max-width: 760px) { .checks { grid-template-columns: 1fr; } .checks li:nth-child(even) { padding-left: 0; border-left: 0; } }

/* CTA band */
.cta-band { padding: 84px 0; background: var(--graphite); color: #fff; border-top: 4px solid var(--red); }
.cta-band .wrap { display: flex; justify-content: space-between; align-items: center; gap: 32px; flex-wrap: wrap; }
.cta-band h2 { max-width: 20ch; }
html[lang="zh-CN"] .cta-band h2 { max-width: 16em; }
.cta-band .actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* Footer */
.site-footer { background: #0E1217; color: var(--on-dark-muted); padding: 64px 0 32px; font-size: 14px; }
.site-footer .brand img { height: 30px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 32px; }
.foot-grid h4 { font: 600 14px var(--display); margin: 0 0 14px; color: #fff; }
.foot-grid ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 9px; }
.foot-grid a { color: var(--on-dark-muted); text-decoration: none; }
.foot-grid a:hover { color: #fff; }
.foot-grid .about { max-width: 34ch; margin-top: 16px; }
.compliance-badge { display: inline-flex; align-items: center; gap: 10px; margin-top: 48px; padding: 10px 14px; border: 1px solid var(--g-rule); color: var(--on-dark); }
.foot-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--g-rule); color: #6E7A8A; }
@media (max-width: 960px) { .foot-grid { grid-template-columns: 1fr 1fr; } .foot-grid > div:first-child { grid-column: span 2; } }

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } html { scroll-behavior: auto; } }
.drawing .scroll { overflow-x: auto; }
@media (max-width: 760px) { .drawing { padding: 16px; } .drawing .scroll svg { min-width: 720px; } }