:root {
  --green: #0fbf8c;
  --green-dark: #07996d;
  --ink: #121614;
  --ink-2: #30383c;
  --muted: #707b7b;
  --soft: #9aa5a4;
  --line: rgba(18, 22, 20, 0.1);
  --line-strong: rgba(18, 22, 20, 0.18);
  --paper: #f5f6f6;
  --white: #fff;
  --shadow: 0 28px 70px rgba(18, 22, 20, 0.14);
  --max: 1360px;
  font-family: "OPPOSans", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
main { overflow: hidden; }

.page-frame {
  width: min(calc(100% - 48px), var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 64px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 26px;
  padding: 0 max(24px, calc((100vw - var(--max)) / 2));
  background: rgba(255,255,255,.86);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(22px);
}

.brand-lockup {
  display: block;
  width: 142px;
  aspect-ratio: 1024 / 588;
  overflow: hidden;
  background: url("/assets/brand/maixi-logo-green-20260520.png") left center / contain no-repeat;
}
.brand-lockup span {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.footer-brand {
  width: 150px;
  filter: brightness(0) invert(1);
}
.nav-links {
  display: flex;
  justify-content: center;
  gap: 6px;
}
.nav-links a {
  display: grid;
  place-items: center;
  min-height: 64px;
  padding: 0 15px;
  color: rgba(18,22,20,.68);
  font-size: 14px;
  font-weight: 700;
}
.nav-links a:hover { color: var(--ink); }
.header-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 18px;
  color: var(--white);
  background: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 4px;
  font-size: 14px;
  font-weight: 700;
}

.hero {
  min-height: calc(100svh - 64px);
  padding: clamp(42px, 6vw, 84px) 0 54px;
  background: linear-gradient(180deg, #fff 0%, #fff 74%, var(--paper) 100%);
}
.hero-grid {
  min-height: min(720px, calc(100svh - 118px));
  display: grid;
  grid-template-columns: minmax(390px, .72fr) minmax(0, 1.28fr);
  gap: clamp(38px, 5.6vw, 82px);
  align-items: center;
}
.hero-copy { max-width: 590px; }
.state-line {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .01em;
}
.state-line span,
.status-grid article span,
.signal-card span,
.platform-dot {
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 0 7px rgba(15,191,140,.13);
}
.hero h1 {
  margin: 0;
  color: #101312;
  font-size: clamp(56px, 5.4vw, 80px);
  line-height: 1.04;
  letter-spacing: 0;
}
.hero h1 span { display: block; }
.hero-lead {
  margin: 28px 0 0;
  color: var(--ink-2);
  font-size: 18px;
  line-height: 1.82;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}
.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  font-size: 15px;
  font-weight: 800;
  transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.button:hover { border-color: rgba(15,191,140,.78); transform: translateY(-1px); }
.button:focus-visible { outline: 3px solid rgba(15,191,140,.22); outline-offset: 3px; }
.button-primary { color: var(--white); background: var(--ink); border-color: var(--ink); }
.button-secondary { color: var(--ink); background: rgba(255,255,255,.78); }
.hero-note {
  margin: 17px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.72;
}

.hero-visual { margin: 0; }
.stage {
  position: relative;
  width: min(100%, 860px);
  aspect-ratio: 1.08;
  margin-left: auto;
  padding: clamp(24px, 3.2vw, 46px);
  overflow: hidden;
  background: linear-gradient(135deg, rgba(248,250,249,.98), rgba(255,255,255,.98) 54%, rgba(235,248,244,.7));
  border: 1px solid var(--line);
  border-radius: clamp(22px, 3.2vw, 38px);
  box-shadow: var(--shadow);
}
.stage:before {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(18,22,20,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(18,22,20,.035) 1px, transparent 1px);
  background-size: 48px 48px;
  content: "";
  opacity: .58;
}
.stage-window {
  position: absolute;
  display: block;
  max-width: none;
  height: auto;
  background: rgba(255,255,255,.96);
  border: 1px solid rgba(18,22,20,.08);
  border-radius: clamp(14px, 1.8vw, 22px);
  box-shadow: 0 24px 60px rgba(18,22,20,.22);
  clip-path: inset(2px round clamp(12px,1.6vw,20px));
  will-change: transform;
}
.stage-main { right: 6%; bottom: 19%; width: 78%; animation: float-main 9s ease-in-out infinite; }
.stage-route { top: 7%; right: 6%; width: 43%; animation: float-route 8s ease-in-out infinite; }
.stage-market { bottom: 6%; left: 5%; width: 38%; animation: float-market 8.5s ease-in-out infinite; }
.signal-card {
  position: absolute;
  right: 11%;
  bottom: 6%;
  width: min(42%, 330px);
  padding: 22px 24px 24px;
  color: var(--ink);
  background: rgba(255,255,255,.84);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: 0 20px 48px rgba(18,22,20,.16);
  backdrop-filter: blur(18px);
  animation: float-signal 8.5s ease-in-out infinite;
}
.signal-card span { display: inline-block; margin-right: 10px; vertical-align: 1px; }
.signal-card strong {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .14em;
}
.signal-card p {
  margin: 12px 0 0;
  font-size: clamp(18px,1.9vw,25px);
  font-weight: 900;
  line-height: 1.38;
}
.hero-visual figcaption {
  margin-top: 16px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
  text-align: right;
}

@keyframes float-main { 0%,100%{transform:translateZ(0) rotate(-.2deg)} 50%{transform:translate3d(-5px,-7px,0) rotate(.2deg)} }
@keyframes float-route { 0%,100%{transform:translateZ(0)} 50%{transform:translate3d(8px,-9px,0)} }
@keyframes float-market { 0%,100%{transform:translateZ(0)} 50%{transform:translate3d(-6px,8px,0)} }
@keyframes float-signal { 0%,100%{transform:translateZ(0)} 50%{transform:translate3d(6px,6px,0)} }

.download-band,
.verify-section,
.workflow-section,
.status-section,
.path-section,
.faq-section { padding: 92px 0; background: var(--white); }
.download-band { background: var(--paper); scroll-margin-top: 82px; }
.download-panel {
  display: grid;
  grid-template-columns: minmax(300px, .36fr) minmax(0, .64fr);
  gap: 48px;
  padding: clamp(34px, 4.6vw, 64px);
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.section-copy span,
.section-head span,
.verify-copy span,
.story-row span {
  display: block;
  margin: 0 0 18px;
  color: var(--green-dark);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.section-copy h2,
.section-head h2,
.verify-copy h2 {
  margin: 0;
  font-size: clamp(31px, 3.1vw, 44px);
  line-height: 1.18;
  letter-spacing: 0;
}
.section-copy p,
.verify-copy p {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.82;
}
.download-grid { display: grid; gap: 18px; }
.download-card {
  display: grid;
  gap: 18px;
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,.92);
}
.primary-card { box-shadow: 0 18px 52px rgba(18,22,20,.07); }
.card-top { display: flex; gap: 14px; align-items: flex-start; min-width: 0; }
.platform-dot { margin-top: 8px; }
.platform-dot.win { background: #2d7ff9; box-shadow: 0 0 0 7px rgba(45,127,249,.1); }
.platform-dot.support { background: #f4a622; box-shadow: 0 0 0 7px rgba(244,166,34,.13); }
.download-card h3 { margin: 0; font-size: 22px; line-height: 1.26; }
.download-card p { margin: 7px 0 0; color: var(--muted); line-height: 1.65; }
.download-card .button { width: fit-content; }
.text-link { width: fit-content; color: #06c; font-size: 14px; font-weight: 700; }
.download-card dl { display: grid; gap: 10px; margin: 0; padding-top: 4px; }
.download-card dl > div { display: grid; grid-template-columns: 72px minmax(0, 1fr); gap: 12px; }
.download-card dt { color: var(--muted); font-size: 12px; }
.download-card dd { min-width: 0; margin: 0; font-size: 12px; line-height: 1.55; word-break: break-all; }
.download-card dd:has(.copy-button) {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.copy-button {
  flex: 0 0 auto;
  min-height: 28px;
  padding: 0 9px;
  color: var(--green-dark);
  background: rgba(15,191,140,.08);
  border: 1px solid rgba(15,191,140,.24);
  border-radius: 4px;
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  font-weight: 800;
}
.copy-button:hover,
.copy-button:focus-visible {
  background: rgba(15,191,140,.14);
  outline: none;
}

.verify-grid { display: grid; grid-template-columns: minmax(300px, .42fr) minmax(0, .58fr); gap: 58px; align-items: start; }
.verify-list { display: grid; border-top: 1px solid var(--line); }
.verify-list article {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  column-gap: 18px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}
.verify-list strong {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  color: var(--green-dark);
  border: 1px solid rgba(15,191,140,.28);
  border-radius: 50%;
}
.verify-list h3 { margin: 2px 0 0; font-size: 22px; }
.verify-list p { grid-column: 2; margin: 8px 0 0; color: var(--muted); line-height: 1.78; }

.workflow-section { background: var(--white); }
.section-head { max-width: 820px; margin-bottom: 42px; }
.story-list { display: grid; }
.story-row {
  display: grid;
  grid-template-columns: minmax(320px, .4fr) minmax(0, .6fr);
  gap: clamp(38px, 5vw, 82px);
  align-items: center;
  padding: 74px 0;
  border-top: 1px solid var(--line);
}
.story-row.reverse { grid-template-columns: minmax(0, .6fr) minmax(320px, .4fr); }
.story-row.reverse > div { order: 2; }
.story-row h3 { margin: 0; font-size: clamp(30px, 3vw, 40px); line-height: 1.2; }
.story-row p { margin: 20px 0 0; color: var(--muted); font-size: 16px; line-height: 1.82; }
.story-row figure {
  margin: 0;
  overflow: hidden;
  background: var(--white);
  border: 1px solid rgba(18,22,20,.08);
  border-radius: 8px;
  box-shadow: 0 24px 58px rgba(18,22,20,.12);
}
.story-row img { width: calc(100% + 10px); height: auto; max-width: none; margin: -3px -5px -5px; }

.status-section { padding-top: 0; }
.status-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.status-grid article {
  min-height: 210px;
  padding: 28px;
  background: #f8f9f9;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.status-grid article span { display: block; margin-bottom: 32px; }
.status-grid h3 { margin: 0; font-size: 23px; }
.status-grid p { margin: 15px 0 0; color: var(--muted); line-height: 1.75; }

.path-section { padding-top: 0; }
.path-panel {
  display: grid;
  grid-template-columns: minmax(220px, .34fr) minmax(0, .66fr);
  gap: 34px;
  padding: 30px;
  color: var(--white);
  background: #101312;
  border-radius: 8px;
}
.path-panel span {
  display: block;
  margin-bottom: 12px;
  color: var(--green);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.path-panel h2 {
  margin: 0;
  font-size: clamp(26px, 2.6vw, 36px);
  line-height: 1.18;
}
.path-panel p {
  margin: 0;
  color: rgba(255,255,255,.78);
  line-height: 1.82;
}
.path-panel code {
  color: #dff8f0;
}

.faq-section { background: var(--paper); }
.faq-grid { display: grid; grid-template-columns: minmax(260px, .32fr) minmax(0, .68fr); gap: 48px; }
.faq-list { display: grid; gap: 12px; }
details {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}
summary {
  cursor: pointer;
  padding: 20px 22px;
  font-size: 18px;
  font-weight: 800;
}
details p { margin: 0; padding: 0 22px 22px; color: var(--muted); line-height: 1.78; }

.site-footer { padding: 50px 0; color: rgba(255,255,255,.72); background: #050707; }
.footer-grid { display: grid; grid-template-columns: .7fr 1.3fr; gap: 46px; align-items: end; }
.footer-grid p { margin: 12px 0 0; line-height: 1.8; }

@media (max-width: 980px) {
  .site-header { grid-template-columns: auto auto; justify-content: space-between; }
  .nav-links, .header-action { display: none; }
  .hero-grid,
  .download-panel,
  .verify-grid,
  .path-panel,
  .story-row,
  .story-row.reverse,
  .faq-grid { grid-template-columns: 1fr; }
  .story-row.reverse > div { order: 0; }
  .stage { width: 100%; margin-left: 0; }
  .status-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .page-frame { width: min(calc(100% - 28px), var(--max)); }
  .site-header { min-height: 58px; padding-inline: 14px; }
  .brand-lockup { width: 124px; }
  .hero { min-height: auto; padding: 38px 0 36px; }
  .hero h1 { font-size: clamp(42px, 13vw, 56px); line-height: 1.08; }
  .hero-lead { margin-top: 20px; font-size: 16px; line-height: 1.7; }
  .hero-actions { display: grid; margin-top: 26px; }
  .button { width: 100%; min-height: 46px; }
  .hero-note { font-size: 13px; }
  .stage { aspect-ratio: 1.28; padding: 16px; border-radius: 22px; }
  .stage-main { right: 5%; bottom: 17%; width: 86%; }
  .stage-route { top: 6%; right: 5%; width: 49%; }
  .stage-market { bottom: 6%; left: 5%; width: 41%; }
  .signal-card, .hero-visual figcaption { display: none; }
  .download-band, .verify-section, .workflow-section, .path-section, .faq-section { padding: 62px 0; }
  .path-section { padding-top: 0; }
  .download-panel { padding: 24px; }
  .download-card { padding: 20px; }
  .download-card dl > div { grid-template-columns: 1fr; gap: 5px; }
  .verify-list article { grid-template-columns: 34px minmax(0,1fr); gap: 14px; }
  .verify-list p { grid-column: 1 / -1; }
  .story-row { padding: 54px 0; }
  .story-row h3, .section-copy h2, .section-head h2, .verify-copy h2 { font-size: clamp(27px, 8vw, 34px); }
  .footer-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *:before, *:after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}