:root {
  --ink: #15171a;
  --ink-soft: #555b63;
  --paper: #f4f5f6;
  --paper-warm: #fff4ec;
  --white: #ffffff;
  --line: #d9dde1;
  --orange: #e8561a;
  --orange-bright: #ff651f;
  --orange-dark: #a93609;
  --green: #087f5b;
  --blue: #2563eb;
  --charcoal: #101317;
  --shadow: 0 20px 48px rgba(18, 22, 27, .14);
  --max: 1180px;
  --header-height: 68px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.65;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}
button, input, a { font: inherit; letter-spacing: 0; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
img { display: block; max-width: 100%; }
section { scroll-margin-top: var(--header-height); }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 3px; }
.shell { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 10px 14px; color: #fff; background: #000; }
.skip-link:focus { top: 12px; }
.section-head { max-width: 790px; margin-bottom: 48px; }
.section-label { margin: 0 0 12px; color: var(--orange-dark); font-size: 14px; font-weight: 780; }
.section-title { margin: 0; font-size: 50px; line-height: 1.1; font-weight: 790; }
.section-lede { max-width: 740px; margin: 20px 0 0; color: var(--ink-soft); font-size: 19px; }
.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 21px;
  border: 1px solid transparent;
  border-radius: 7px;
  text-decoration: none;
  font-weight: 760;
  cursor: pointer;
  transition: transform .2s ease, background-color .2s ease, border-color .2s ease;
}
.button:hover { transform: translateY(-1px); }
.button-primary { color: #fff; background: var(--orange); }
.button-primary:hover { background: var(--orange-bright); }
.button-dark { color: #fff; background: var(--charcoal); }
.button-outline { color: inherit; border-color: currentColor; background: transparent; }
.button-muted { color: #70757c; border-color: #c8ccd0; background: #f5f6f7; cursor: default; }
.button svg { width: 19px; height: 19px; flex: 0 0 auto; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--header-height);
  color: #fff;
  transition: color .2s ease, background-color .2s ease, box-shadow .2s ease;
}
.site-header.scrolled, .site-header.menu-open {
  color: var(--ink);
  background: rgba(255,255,255,.94);
  box-shadow: 0 1px 0 rgba(15,18,22,.1);
  backdrop-filter: blur(18px) saturate(140%);
}
.header-inner { height: 100%; display: flex; align-items: center; gap: 30px; }
.brand { min-height: 44px; display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 830; white-space: nowrap; }
.brand-mark { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 7px; color: #fff; background: var(--orange); font-size: 13px; box-shadow: 0 7px 18px rgba(232,86,26,.28); }
.brand-mark::before { content: "提"; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 22px; }
.nav a { min-height: 44px; display: inline-flex; align-items: center; color: inherit; text-decoration: none; font-size: 14px; font-weight: 680; opacity: .82; }
.nav a:hover { opacity: 1; }
.nav-cta { min-height: 42px !important; padding: 0 16px; border-radius: 7px; color: #fff !important; background: var(--orange); opacity: 1 !important; }
.menu-button { display: none; width: 44px; height: 44px; margin-left: auto; border: 0; color: inherit; background: transparent; font-size: 26px; cursor: pointer; }

.hero {
  position: relative;
  min-height: 660px;
  height: min(82svh, 780px);
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #fff;
  background: #18120f url("hero.jpg") center / cover no-repeat;
}
.hero::before { content: ""; position: absolute; inset: 0; background: rgba(5,7,9,.58); }
.hero::after { content: ""; position: absolute; inset: 0 46% 0 0; background: rgba(5,7,9,.34); }
.hero-content { position: relative; z-index: 2; width: min(690px, 70%); padding-top: 70px; }
.product-name { margin: 0 0 18px; color: #fff; font-size: 20px; font-weight: 800; }
.hero h1 { margin: 0; font-size: 72px; line-height: 1.02; font-weight: 830; }
.hero-tagline { margin: 22px 0 0; font-size: 28px; font-weight: 700; }
.hero-copy { max-width: 620px; margin: 18px 0 0; color: rgba(255,255,255,.78); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero .button-outline { color: #fff; border-color: rgba(255,255,255,.58); background: rgba(0,0,0,.18); }
.hero-platforms { display: flex; flex-wrap: wrap; gap: 9px 20px; margin: 30px 0 0; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.24); color: rgba(255,255,255,.72); font-size: 13px; font-weight: 650; }

.flow-band { border-bottom: 1px solid var(--line); background: #fff; }
.flow { display: grid; grid-template-columns: repeat(6, 1fr); }
.flow-step { min-height: 112px; display: grid; grid-template-columns: 34px 1fr; align-content: center; gap: 2px 12px; padding: 20px 16px; border-right: 1px solid var(--line); }
.flow-step:first-child { border-left: 1px solid var(--line); }
.flow-step b { grid-row: 1 / 3; width: 30px; height: 30px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--charcoal); font-size: 12px; }
.flow-step strong { font-size: 15px; }
.flow-step span { color: var(--ink-soft); font-size: 12px; }

.how { padding: 112px 0; background: var(--paper); }
.how-layout { display: grid; grid-template-columns: .78fr 1.22fr; gap: 64px; align-items: start; }
.how-copy { position: sticky; top: 110px; }
.phrase-list { display: grid; gap: 9px; margin-top: 30px; }
.phrase { min-height: 54px; width: 100%; padding: 10px 14px; border: 1px solid #cfd3d7; border-radius: 7px; color: var(--ink); background: transparent; text-align: left; cursor: pointer; }
.phrase:hover { border-color: #93999f; background: #fff; }
.phrase.active { color: var(--orange-dark); border-color: var(--orange); background: var(--paper-warm); box-shadow: inset 3px 0 var(--orange); }
.parse-tool { overflow: hidden; border: 1px solid #cfd3d7; border-radius: 8px; background: #fff; box-shadow: var(--shadow); }
.tool-bar { min-height: 48px; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 0 18px; border-bottom: 1px solid #e3e5e7; color: #666c73; font-size: 13px; font-weight: 700; }
.live { display: inline-flex; align-items: center; gap: 8px; color: var(--green); }
.live::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; box-shadow: 0 0 0 5px rgba(8,127,91,.11); }
.voice-result { padding: 32px 28px 26px; border-bottom: 1px solid #e3e5e7; background: #fafafa; }
.voice-result small { color: #747a82; font-weight: 700; }
.voice-result p { margin: 9px 0 0; font-size: 27px; line-height: 1.35; font-weight: 780; }
.wave { height: 34px; display: flex; align-items: center; gap: 4px; margin-top: 21px; }
.wave i { width: 3px; height: var(--h); border-radius: 2px; background: var(--orange); animation: wave 1.1s ease-in-out infinite alternate; animation-delay: var(--delay); }
@keyframes wave { to { height: 6px; opacity: .35; } }
.parse-grid { display: grid; grid-template-columns: 1fr 1fr; }
.parse-item { min-height: 112px; padding: 20px 22px; border-right: 1px solid #e3e5e7; border-bottom: 1px solid #e3e5e7; }
.parse-item:nth-child(2n) { border-right: 0; }
.parse-item span { display: block; color: #747a82; font-size: 13px; font-weight: 700; }
.parse-item strong { display: block; margin-top: 7px; font-size: 19px; }
.parse-note { padding: 17px 22px; color: #525860; background: var(--paper-warm); font-size: 14px; }

.schedule { padding: 116px 0; background: #fff; }
.schedule-layout { display: grid; grid-template-columns: .74fr 1.26fr; gap: 70px; align-items: center; }
.schedule-points { margin: 30px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.schedule-points li { padding: 15px 0; border-bottom: 1px solid var(--line); color: var(--ink-soft); }
.schedule-points strong { color: var(--ink); }
.calendar-tool { border: 1px solid var(--line); border-radius: 8px; overflow: hidden; box-shadow: var(--shadow); }
.calendar-tabs { min-height: 62px; display: flex; align-items: center; gap: 6px; padding: 9px 12px; border-bottom: 1px solid var(--line); background: var(--paper); }
.calendar-tabs button { min-width: 52px; min-height: 44px; border: 0; border-radius: 6px; color: #626871; background: transparent; font-weight: 700; cursor: pointer; }
.calendar-tabs button.active { color: #fff; background: var(--charcoal); }
.calendar-title { margin-left: auto; color: #4f555c; font-size: 14px; font-weight: 700; }
.agenda { display: grid; grid-template-columns: 90px 1fr; }
.agenda-time { padding: 17px 14px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); color: #717780; font-size: 13px; text-align: right; }
.agenda-event { min-height: 72px; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.agenda-event strong { display: block; }
.agenda-event span { color: var(--ink-soft); font-size: 13px; }
.agenda-event.urgent { box-shadow: inset 4px 0 var(--orange); background: var(--paper-warm); }
.agenda-event.focus { box-shadow: inset 4px 0 var(--blue); background: #f0f5ff; }
.agenda-footer { padding: 15px 18px; color: var(--ink-soft); background: var(--paper); font-size: 13px; }

.alert { padding: 116px 0; color: #fff; background: var(--charcoal); }
.alert .section-label { color: #ff8b58; }
.alert .section-lede { color: rgba(255,255,255,.66); }
.alert-track { position: relative; display: grid; grid-template-columns: repeat(6, 1fr); margin-top: 54px; }
.alert-track::before { content: ""; position: absolute; left: 3%; right: 3%; top: 18px; height: 1px; background: rgba(255,255,255,.2); }
.alert-stage { position: relative; z-index: 1; padding-right: 22px; }
.alert-stage b { width: 36px; height: 36px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.28); border-radius: 50%; color: rgba(255,255,255,.62); background: var(--charcoal); font-size: 12px; }
.alert-stage.active b { color: #fff; border-color: var(--orange); background: var(--orange); }
.alert-stage small { display: block; margin-top: 16px; color: rgba(255,255,255,.5); }
.alert-stage h3 { margin: 7px 0 0; font-size: 18px; }
.alert-stage p { margin: 8px 0 0; color: rgba(255,255,255,.56); font-size: 13px; }
.alert-control { display: flex; align-items: center; gap: 18px; margin-top: 40px; }
.alert-control label { min-width: 126px; font-size: 13px; font-weight: 700; }
.alert-control input { width: min(520px, 100%); min-height: 44px; accent-color: var(--orange); }
.alert-control output { min-width: 130px; color: #ff9b6d; font-size: 13px; font-weight: 760; }
.alert-stop { margin: 24px 0 0; padding-left: 16px; border-left: 3px solid #31b887; color: rgba(255,255,255,.7); }

.platforms { padding: 116px 0; background: var(--paper); }
.platform-intro { display: grid; grid-template-columns: 1fr .8fr; gap: 70px; align-items: end; }
.platform-intro .section-head { margin-bottom: 0; }
.platform-principle { margin: 0; padding: 18px 0 18px 20px; border-left: 3px solid var(--orange); color: var(--ink-soft); }
.platform-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 52px; }
.platform-card { overflow: hidden; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.platform-visual { height: 390px; display: flex; align-items: flex-start; justify-content: center; overflow: hidden; padding: 28px 24px 0; background: #e9ecef; }
.platform-visual img { width: min(210px, 82%); height: auto; border: 6px solid #22262b; border-bottom: 0; border-radius: 26px 26px 0 0; box-shadow: 0 18px 38px rgba(17,20,24,.22); }
.platform-card.harmony .platform-visual img { width: min(250px, 88%); }
.platform-body { min-height: 252px; padding: 24px; }
.platform-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.platform-heading h3 { margin: 0; font-size: 23px; }
.status { flex: 0 0 auto; padding: 4px 7px; border-radius: 4px; color: var(--green); background: #e8f6f0; font-size: 11px; font-style: normal; font-weight: 800; }
.status.pending { color: #865213; background: #fff1da; }
.platform-body p { margin: 12px 0 0; color: var(--ink-soft); font-size: 15px; }
.platform-body ul { margin: 18px 0 0; padding-left: 19px; color: #41474f; font-size: 14px; }
.platform-body li + li { margin-top: 7px; }

.reliability { padding: 116px 0; background: #edf0ed; }
.reliability-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 74px; align-items: start; }
.truth-note { margin-top: 26px; padding: 19px 21px; border: 1px solid #c8ceca; border-radius: 7px; background: rgba(255,255,255,.58); color: #41474d; font-size: 14px; }
.reliability-list { border-top: 1px solid #cbd0cc; }
.reliability-item { display: grid; grid-template-columns: 46px 1fr; gap: 15px; padding: 24px 0; border-bottom: 1px solid #cbd0cc; }
.reliability-item b { color: var(--orange-dark); font-size: 13px; }
.reliability-item h3 { margin: 0; font-size: 20px; }
.reliability-item p { margin: 7px 0 0; color: var(--ink-soft); font-size: 14px; }

.scenes { padding: 110px 0; background: #fff; }
.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.scene { min-height: 270px; display: flex; flex-direction: column; justify-content: space-between; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.scene:nth-child(2) { background: #f3f6fb; }
.scene:nth-child(3) { color: #fff; background: #20242a; }
.scene small { color: var(--orange-dark); font-weight: 780; }
.scene:nth-child(3) small { color: #ff915f; }
.scene h3 { margin: 56px 0 0; font-size: 27px; line-height: 1.22; }
.scene p { margin: 13px 0 0; color: var(--ink-soft); font-size: 14px; }
.scene:nth-child(3) p { color: rgba(255,255,255,.64); }
.scene q { display: block; margin-top: 20px; font-size: 13px; font-weight: 700; }

.download { padding: 116px 0; background: var(--paper-warm); }
.download .section-head { max-width: 850px; }
.download-list { border-top: 1px solid #d7cfc9; }
.download-row { display: grid; grid-template-columns: 220px 1fr auto; gap: 30px; align-items: center; padding: 28px 0; border-bottom: 1px solid #d7cfc9; }
.download-platform { display: flex; align-items: center; gap: 13px; }
.platform-icon { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 8px; color: #fff; background: var(--charcoal); font-size: 13px; font-weight: 800; }
.download-platform strong { display: block; }
.download-platform span { color: var(--ink-soft); font-size: 12px; }
.download-detail { color: var(--ink-soft); font-size: 14px; }
.download-detail strong { color: var(--ink); }
.release-meta { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; margin-top: 30px; border: 1px solid #d7cfc9; background: #d7cfc9; }
.release-meta div { min-height: 90px; padding: 16px; background: rgba(255,255,255,.72); }
.release-meta span { display: block; color: #74706d; font-size: 12px; font-weight: 700; }
.release-meta strong { display: block; margin-top: 7px; font-size: 14px; overflow-wrap: anywhere; }
.release-meta .sha { grid-column: span 2; }
.download-note { margin: 19px 0 0; color: #6d6661; font-size: 13px; }

.faq { padding: 100px 0; background: #fff; }
.faq-list { max-width: 880px; border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 20px; cursor: pointer; list-style: none; font-weight: 730; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--orange); font-size: 25px; font-weight: 400; }
details[open] summary::after { content: "−"; }
details p { max-width: 760px; margin: 0; padding: 0 0 24px; color: var(--ink-soft); }

.footer { padding: 66px 0 24px; color: rgba(255,255,255,.68); background: #0c0e11; }
.footer-grid { display: grid; grid-template-columns: 1.45fr repeat(3, .62fr); gap: 48px; }
.footer-brand { color: #fff; font-size: 24px; font-weight: 820; }
.footer-copy { max-width: 380px; margin: 10px 0 0; font-size: 13px; }
.footer-contact { min-height: 44px; display: inline-flex; align-items: center; margin-top: 15px; color: #fff; text-decoration: none; font-size: 14px; font-weight: 720; }
.footer-col { display: grid; align-content: start; }
.footer-col strong { min-height: 36px; color: #fff; font-size: 13px; }
.footer-col a { min-height: 42px; display: inline-flex; align-items: center; text-decoration: none; font-size: 13px; }
.footer-col a:hover, .footer-contact:hover { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 24px; margin-top: 42px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.14); font-size: 12px; }

.reveal { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .nav { display: none; position: absolute; inset: var(--header-height) 0 auto; padding: 14px 24px 22px; color: var(--ink); background: #fff; box-shadow: 0 12px 28px rgba(16,19,23,.12); }
  .nav.open { display: grid; }
  .nav a { min-height: 48px; }
  .nav-cta { margin-top: 6px; justify-content: center; }
  .menu-button { display: block; }
  .hero-content { width: min(660px, 82%); }
  .hero h1 { font-size: 62px; }
  .flow { grid-template-columns: repeat(3, 1fr); }
  .flow-step:nth-child(3) { border-right: 1px solid var(--line); }
  .flow-step:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
  .how-layout, .schedule-layout, .reliability-layout { grid-template-columns: 1fr; gap: 46px; }
  .how-copy { position: static; }
  .platform-intro { grid-template-columns: 1fr; gap: 26px; }
  .platform-grid { grid-template-columns: 1fr 1fr; }
  .platform-card:last-child { grid-column: 1 / -1; }
  .platform-card:last-child .platform-visual { height: 430px; }
  .alert-track { width: 980px; }
  .alert-scroll { overflow-x: auto; padding-bottom: 12px; }
  .scene-grid { grid-template-columns: 1fr 1fr; }
  .scene:last-child { grid-column: 1 / -1; }
  .download-row { grid-template-columns: 190px 1fr; }
  .download-row .button { grid-column: 2; justify-self: start; }
}

@media (max-width: 680px) {
  body { font-size: 16px; }
  .shell { width: min(calc(100% - 32px), var(--max)); }
  :root { --header-height: 60px; }
  .header-inner { gap: 12px; }
  .hero { min-height: 0; height: auto; padding: 104px 0 76px; background-position: 62% center; }
  .hero::after { inset: 0; background: rgba(5,7,9,.17); }
  .hero-content { width: 100%; padding: 0; }
  .product-name { font-size: 18px; }
  .hero h1 { font-size: 46px; }
  .hero-tagline { font-size: 22px; }
  .hero-copy { font-size: 16px; }
  .hero-actions { display: grid; }
  .button { width: 100%; }
  .section-title { font-size: 36px; }
  .section-lede { font-size: 17px; }
  .how, .schedule, .alert, .platforms, .reliability, .scenes, .download { padding: 78px 0; }
  .flow { grid-template-columns: 1fr 1fr; }
  .flow-step { min-height: 96px; padding: 16px 12px; }
  .flow-step:nth-child(-n+4) { border-bottom: 1px solid var(--line); }
  .voice-result { padding: 26px 20px 22px; }
  .voice-result p { font-size: 22px; }
  .parse-grid { grid-template-columns: 1fr; }
  .parse-item, .parse-item:nth-child(2n) { min-height: 92px; border-right: 0; }
  .agenda { grid-template-columns: 70px 1fr; }
  .calendar-tabs button { min-width: 44px; }
  .calendar-title { display: none; }
  .alert-control { align-items: flex-start; flex-direction: column; gap: 6px; }
  .alert-control input { width: 100%; }
  .platform-grid { grid-template-columns: 1fr; }
  .platform-card:last-child { grid-column: auto; }
  .platform-visual, .platform-card:last-child .platform-visual { height: 360px; }
  .platform-body { min-height: 0; }
  .scene-grid { grid-template-columns: 1fr; }
  .scene:last-child { grid-column: auto; }
  .scene { min-height: 230px; }
  .download-row { grid-template-columns: 1fr; gap: 16px; }
  .download-row .button { grid-column: auto; width: 100%; }
  .release-meta { grid-template-columns: 1fr 1fr; }
  .release-meta .sha { grid-column: 1 / -1; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px 24px; }
  .footer-about { grid-column: 1 / -1; }
  .footer-bottom { align-items: flex-start; flex-direction: column; gap: 8px; }
}

@media (max-width: 390px) {
  .hero h1 { font-size: 41px; }
  .flow { grid-template-columns: 1fr; }
  .flow-step { border-bottom: 1px solid var(--line); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-about { grid-column: auto; }
}

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