@charset "UTF-8";

:root {
  --ink: #10271c;
  --muted: #5f7167;
  --paper: #f8f8f1;
  --panel: #ffffff;
  --line: #cfdbcf;
  --green: #23643d;
  --lime: #b8dc35;
  --orange: #fb6b35;
  --header-height: 76px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; overflow-x: clip; }

body {
  min-width: 320px;
  margin: 0;
  padding-top: var(--header-height);
  overflow-x: clip;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.7;
}

button, a { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }

a { color: inherit; text-decoration: none; }

button { color: inherit; font: inherit; cursor: pointer; }

img { display: block; max-width: 100%; }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.section-shell, .nav-shell, .footer-shell { width: calc(100% - 48px); max-width: 1200px; margin: 0 auto; }

.site-header {
  position: fixed;
  z-index: 1000;
  top: 0;
  right: 0;
  left: 0;
  height: var(--header-height);
  border-bottom: 1px solid var(--line);
  background: rgba(248, 248, 241, 0.98);
  transform: translateZ(0);
  backface-visibility: hidden;
}

.nav-shell { display: flex; align-items: center; justify-content: space-between; height: 100%; gap: 24px; }

.brand, .footer-brand { display: inline-flex; align-items: center; min-width: 0; gap: 10px; }

.brand img { width: 48px; height: 48px; border: 1px solid var(--line); border-radius: 10px; object-fit: contain; background: #fff; }

.brand-copy, .footer-brand span { display: grid; min-width: 0; line-height: 1.2; }

.brand strong, .footer-brand strong { font-size: 18px; white-space: nowrap; }

.brand-copy span, .footer-brand small { overflow: visible; color: var(--muted); font-size: 12px; white-space: nowrap; text-overflow: clip; }

.primary-nav ul, .site-footer ul { display: flex; align-items: center; gap: 28px; margin: 0; padding: 0; list-style: none; }

.primary-nav a { display: inline-flex; height: 76px; align-items: center; border-bottom: 2px solid transparent; font-weight: 700; }

.primary-nav a:hover { color: var(--green); border-color: var(--green); }

.header-actions { display: flex; align-items: center; gap: 10px; }

.header-download, .hero-download, .download-cta { display: inline-flex; align-items: center; justify-content: center; gap: 9px; font-weight: 700; }

.header-download { min-height: 42px; padding: 0 17px; color: #fff; background: var(--green); }

.header-download .icon, .hero-download .icon, .download-cta .icon, .review-user .icon { filter: brightness(0) invert(1); }

.menu-toggle { display: none; width: 44px; height: 42px; padding: 0; border: 1px solid var(--ink); background: transparent; }

.icon { display: inline-block; width: 18px; height: 18px; flex: 0 0 18px; background-repeat: no-repeat; background-position: center; background-size: contain; vertical-align: -3px; }
.icon-download { background-image: url("../icons/download.svg"); }
.icon-menu { background-image: url("../icons/menu.svg"); }
.icon-device { background-image: url("../icons/device.svg"); }
.icon-folder { background-image: url("../icons/folder.svg"); }
.icon-terminal { background-image: url("../icons/terminal.svg"); }
.icon-search { background-image: url("../icons/search.svg"); }
.icon-wifi { background-image: url("../icons/wifi.svg"); }
.icon-check { background-image: url("../icons/check.svg"); }
.icon-user { background-image: url("../icons/user.svg"); }
.icon-plus { background-image: url("../icons/plus.svg"); }
.icon-globe { background-image: url("../icons/globe.svg"); }
.icon-arrow-up { background-image: url("../icons/arrow-up.svg"); }

.hero { display: grid; grid-template-columns: minmax(0, 1fr) 360px; align-items: center; min-height: 650px; gap: 90px; padding-top: 68px; padding-bottom: 68px; }

.eyebrow { margin: 0 0 12px; color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: 2px; }

.hero h1 { margin: 0 0 15px; font-size: 68px; line-height: 1; letter-spacing: -3px; white-space: nowrap; }

.hero h2 { max-width: 560px; margin: 0 0 22px; font-size: 32px; line-height: 1.25; }

.hero-description { max-width: 620px; margin: 0; color: #475e51; font-size: 16px; }

.feature-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 26px 0; }

.feature-tags span { display: inline-flex; min-height: 42px; align-items: center; gap: 8px; padding: 0 13px; border: 1px solid var(--line); background: #fff; font-weight: 700; }

.download-stack { display: grid; justify-items: start; gap: 9px; }

.hero-download { min-width: 220px; min-height: 56px; padding: 0 24px; color: #fff; background: var(--green); font-size: 16px; }

.age-label { color: #617166; font-size: 12px; }

.phone-stage { justify-self: end; display: flex; justify-content: flex-end; width: 360px; }

.phone-frame { width: 326px; min-height: 576px; overflow: hidden; border: 11px solid #111a14; border-radius: 42px; background: #fff; box-shadow: none; }

.phone-status { display: flex; justify-content: space-between; padding: 10px 18px 8px; font-size: 12px; font-weight: 700; }

.phone-head { display: flex; align-items: center; gap: 9px; padding: 8px 16px 13px; border-bottom: 1px solid #e2e9e3; }

.phone-head .icon { width: 17px; height: 17px; margin-left: auto; }
.phone-mark { display: grid; width: 28px; height: 28px; place-items: center; border-radius: 8px; color: #fff; background: var(--green); font-weight: 900; }

.phone-connect { display: grid; gap: 4px; margin: 14px; padding: 14px; border-radius: 10px; color: #fff; background: var(--green); }
.phone-connect span { color: #dcf7cf; font-size: 12px; }
.phone-connect strong { font-size: 16px; }
.phone-connect small { color: #eaf8e2; font-size: 12px; }
.status-dot { display: inline-block; width: 8px; height: 8px; margin-right: 5px; border-radius: 50%; background: #7dff9d; }

.phone-tabs { display: grid; grid-template-columns: repeat(3, 1fr); padding: 0 14px; }
.phone-tabs button { height: 39px; border: 0; border-bottom: 2px solid #dfe7df; background: #fff; font-size: 12px; }
.phone-tabs .is-current { border-color: var(--green); color: var(--green); font-weight: 800; }

.phone-cards { display: grid; gap: 9px; padding: 14px; }
.phone-card { display: flex; align-items: center; gap: 10px; padding: 11px; border: 1px solid #d8e2d9; border-radius: 8px; background: #f9fcf8; text-align: left; }
.phone-card span { display: grid; font-weight: 700; }
.phone-card small { color: #6d7c70; font-size: 11px; font-weight: 400; }
.phone-card b { margin-left: auto; color: var(--green); font-size: 20px; }
.phone-bottom { display: flex; justify-content: space-around; margin-top: 19px; padding: 12px 6px; border-top: 1px solid #e0e7e0; color: #66736a; font-size: 11px; }
.phone-bottom .is-active { color: var(--green); font-weight: 800; }

.connection-section, .workflow-section, .screens-section, .faq-section, .reviews-section { padding: 90px 0; }
.connection-section { background: #e8f1e5; }
.workflow-section { background: #143e2a; color: #fff; }
.screens-section { background: #fbfaf3; }
.faq-section { background: #f4f6ef; }
.reviews-section { background: #e7f0eb; }

.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-bottom: 34px; }
.section-heading .eyebrow { margin-bottom: 6px; }
.section-heading h2 { margin: 0; font-size: 42px; line-height: 1.15; letter-spacing: -2px; }
.section-heading > p { max-width: 430px; margin: 0; color: var(--muted); font-size: 15px; }
.workflow-section .section-heading > p { color: #cfe2d7; }

.connection-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr); gap: 16px; }
.device-overview { grid-row: span 2; padding: 30px; border: 1px solid #9ab6a0; background: #fff; }
.device-top { display: flex; align-items: center; gap: 7px; padding-bottom: 20px; border-bottom: 1px solid var(--line); }
.device-top span:last-child { margin-left: auto; padding: 3px 10px; color: var(--green); background: #e8f4df; font-size: 12px; font-weight: 800; }
.device-main { display: flex; align-items: center; gap: 18px; padding: 28px 0; }
.device-main > .icon { width: 44px; height: 44px; flex-basis: 44px; }
.device-main strong { font-size: 22px; }
.device-main p { margin: 3px 0 0; color: var(--muted); }
.outline-action { margin-left: auto; padding: 8px 12px; border: 1px solid var(--green); color: var(--green); background: #fff; font-size: 12px; font-weight: 800; }
.device-meter { display: grid; grid-template-columns: 85px minmax(80px, 1fr) auto; align-items: center; gap: 12px; padding-top: 17px; border-top: 1px solid var(--line); }
.device-meter b { height: 8px; overflow: hidden; border-radius: 5px; background: #dce8dc; }
.device-meter b i { display: block; width: 57%; height: 100%; background: var(--lime); }
.device-meter em { color: var(--muted); font-size: 12px; font-style: normal; }
.connection-actions { display: grid; gap: 12px; }
.connection-actions button { display: flex; align-items: center; gap: 14px; min-height: 82px; padding: 14px 18px; border: 1px solid #a2bba7; background: rgba(255,255,255,0.55); text-align: left; }
.connection-actions button:hover { background: #fff; }
.connection-actions span { display: grid; font-weight: 800; }
.connection-actions small { color: var(--muted); font-size: 12px; font-weight: 400; }
.connection-notice { align-self: end; margin: 0; padding: 13px 16px; border-left: 4px solid var(--lime); background: #fff; color: var(--muted); font-size: 13px; }

.workflow-layout { display: grid; grid-template-columns: 280px minmax(0, 1fr); min-height: 356px; border: 1px solid #4a765e; }
.workflow-menu { display: grid; align-content: start; background: #0e2b1d; }
.workflow-menu button { min-height: 88px; padding: 0 28px; border: 0; border-bottom: 1px solid #355a47; color: #d5e8da; background: transparent; text-align: left; font-size: 17px; font-weight: 800; }
.workflow-menu .is-active { color: #133a26; background: var(--lime); }
.workflow-panel { padding: 42px; background: #164730; }
.panel-index { margin: 0 0 8px; color: var(--lime); font-size: 12px; font-weight: 800; letter-spacing: 2px; }
.workflow-panel h3 { margin: 0; font-size: 34px; }
.workflow-panel > p:not(.panel-index) { max-width: 560px; color: #d6e8db; font-size: 15px; }
.panel-rows { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 28px 0; }
.panel-rows span { display: flex; justify-content: space-between; padding: 12px; border: 1px solid #56806a; color: #e4f1e6; }
.panel-rows b { color: var(--lime); }
.panel-action { min-height: 43px; padding: 0 18px; border: 0; color: #173b27; background: var(--lime); font-weight: 800; }

.screens-list { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.screen-card { min-width: 0; margin: 0; border: 1px solid #cdd7cf; background: #fff; }
.screen-visual { display: grid; width: 100%; height: 390px; place-items: center; padding: 8px; background: #f5f7f1; }
.screen-visual img { width: 100%; height: 100%; object-fit: contain; }
.screen-card figcaption { display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; padding: 18px; border-top: 1px solid #dfe5dc; }
.screen-card figcaption b { grid-row: span 2; color: var(--green); font-size: 15px; }
.screen-card figcaption strong { font-size: 17px; }
.screen-card figcaption span { color: var(--muted); font-size: 12px; }

.faq-list { border-top: 1px solid var(--ink); }
.faq-item { border-bottom: 1px solid #c9d1c9; }
.faq-item > button, .site-info > button { display: flex; width: 100%; align-items: center; justify-content: space-between; gap: 20px; padding: 19px 16px; border: 0; background: transparent; text-align: left; font-weight: 800; }
.faq-item > button span { display: flex; align-items: center; gap: 20px; }
.faq-item > button b { color: var(--green); font-size: 12px; }
.faq-item > button .icon, .site-info > button > .icon { transition: transform 180ms ease; }
.faq-answer { display: grid; grid-template-rows: 0fr; overflow: hidden; transition: grid-template-rows 180ms ease; }
.faq-answer p { min-height: 0; margin: 0; overflow: hidden; }
.faq-answer p { padding: 0 53px 0; color: var(--muted); }
.faq-item.is-open .faq-answer { grid-template-rows: 1fr; }
.faq-item.is-open .faq-answer p { padding-bottom: 18px; }
.faq-item.is-open > button .icon, .site-info.is-open > button > .icon { transform: rotate(45deg); }
.site-info { margin-top: 22px; border: 1px solid var(--ink); background: #fff; }
.site-info > button span { display: flex; align-items: center; gap: 11px; }
.site-info > div { max-height: 0; overflow: hidden; transition: max-height 180ms ease; }
.site-info.is-open > div { max-height: 96px; }
.site-info > div a { display: block; padding: 0 45px 17px; color: var(--green); font-size: 14px; text-decoration: underline; }

.reviews-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.review-card { display: flex; min-height: 265px; flex-direction: column; padding: 22px; border-top: 3px solid var(--green); background: #fff; }
.review-card:nth-child(2n) { border-top-color: var(--orange); }
.review-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.review-user { display: inline-flex; align-items: center; gap: 9px; }
.review-user .icon { width: 34px; height: 34px; flex-basis: 34px; padding: 7px; border-radius: 50%; background-color: var(--ink); background-size: 18px; }
.review-rating { color: #e69b20; font-size: 13px; letter-spacing: 1px; white-space: nowrap; }
.review-card p { margin: 20px 0; color: #263c30; }
.review-card time { margin-top: auto; align-self: end; color: #6b7d70; font-size: 12px; }

.download-section { padding: 78px 0; background: #123a27; }
.download-panel { display: grid; grid-template-columns: 190px minmax(0, 1fr) 250px; align-items: stretch; border: 1px solid #cce5c2; background: #f7f7ef; }
.download-index { display: grid; align-content: center; justify-items: center; padding: 24px; color: #193d28; background: var(--lime); }
.download-index span { font-size: 58px; font-weight: 900; line-height: 1; }
.download-index small { font-size: 11px; font-weight: 800; letter-spacing: 1.5px; }
.download-copy { display: grid; align-content: center; padding: 30px 38px; }
.download-copy p { margin: 0 0 5px; color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: 1.5px; }
.download-copy h2 { margin: 0 0 6px; font-size: 28px; line-height: 1.25; }
.download-copy span { color: var(--muted); }
.download-cta { min-height: 100%; color: #fff; background: var(--orange); font-size: 17px; }

.site-footer { color: #e7f0e7; background: #10291d; }
.footer-shell { display: grid; grid-template-columns: 1fr auto; gap: 28px; padding: 36px 0 20px; }
.footer-brand img { width: 46px; height: 46px; border-radius: 9px; object-fit: contain; background: #fff; }
.footer-brand small { color: #b6cabd; }
.site-footer nav { align-self: center; }
.site-footer ul { gap: 21px; font-size: 13px; }
.site-footer a:hover { color: var(--lime); }
.site-footer p { grid-column: 1 / -1; margin: 0; padding-top: 17px; border-top: 1px solid rgba(231,240,231,0.32); color: #c7d7ca; text-align: center; font-size: 12px; }

.back-top { position: fixed; z-index: 900; right: 26px; bottom: 26px; display: grid; width: 48px; height: 48px; place-items: center; border: 1px solid #123a27; border-radius: 50%; background: var(--lime); box-shadow: 0 8px 18px rgba(10,45,28,0.2); }
.back-top .icon { width: 19px; height: 19px; }

@media (max-width: 900px) {
  :root { --header-height: 66px; }
  .section-shell, .nav-shell, .footer-shell { width: calc(100% - 28px); }
  .brand img { width: 38px; height: 38px; }
  .brand strong { font-size: 15px; }
  .header-download { min-height: 38px; padding: 0 11px; font-size: 13px; }
  .primary-nav { position: absolute; top: 66px; right: 14px; left: 14px; display: none; border: 1px solid var(--ink); background: var(--paper); }
  .site-header.menu-open .primary-nav { display: block; }
  .primary-nav ul { display: grid; gap: 0; }
  .primary-nav li + li { border-top: 1px solid var(--line); }
  .primary-nav a { display: flex; height: auto; padding: 13px 16px; border: 0; }
  .menu-toggle { display: grid; place-items: center; }
  .hero { grid-template-columns: 1fr; min-height: auto; gap: 36px; padding-top: 48px; padding-bottom: 50px; text-align: center; }
  .hero-copy { min-width: 0; }
  .hero h1 { margin-bottom: 18px; font-size: 48px; letter-spacing: -2px; white-space: normal; overflow-wrap: anywhere; }
  .hero h2 { margin-right: auto; margin-left: auto; font-size: 27px; }
  .hero-description { margin-right: auto; margin-left: auto; font-size: 14px; }
  .eyebrow { font-size: 11px; }
  .feature-tags, .download-stack { justify-content: center; justify-items: center; }
  .phone-stage { justify-self: center; justify-content: center; width: 100%; }
  .phone-frame { width: 302px; min-height: 548px; }
  .connection-section, .workflow-section, .screens-section, .faq-section, .reviews-section { padding: 62px 0; }
  .section-heading { display: grid; gap: 12px; margin-bottom: 26px; }
  .section-heading h2 { font-size: 34px; }
  .section-heading > p { font-size: 14px; }
  .connection-grid, .workflow-layout { grid-template-columns: 1fr; }
  .device-overview { grid-row: auto; padding: 22px; }
  .device-main { align-items: start; flex-wrap: wrap; }
  .outline-action { margin-left: 0; }
  .connection-notice { min-height: 0; }
  .workflow-menu { grid-template-columns: repeat(3, 1fr); }
  .workflow-menu button { min-height: 70px; padding: 8px; font-size: 13px; text-align: center; }
  .workflow-panel { padding: 27px 20px; }
  .workflow-panel h3 { font-size: 27px; }
  .panel-rows { grid-template-columns: 1fr; margin: 20px 0; }
  .screens-list { display: flex; gap: 12px; width: calc(100% + 28px); margin-right: -14px; padding: 0 14px 12px 0; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: thin; }
  .screen-card { flex: 0 0 230px; scroll-snap-align: start; }
  .screen-visual { height: 360px; }
  .faq-item > button, .site-info > button { padding: 17px 10px; }
  .faq-item > button span { gap: 12px; }
  .faq-answer p { padding-right: 10px; padding-left: 37px; font-size: 13px; }
  .site-info > div a { padding-left: 37px; }
  .reviews-grid { grid-template-columns: 1fr; }
  .review-card { min-height: 0; }
  .download-section { padding: 48px 0; }
  .download-panel { grid-template-columns: 1fr; }
  .download-index { min-height: 112px; }
  .download-copy { padding: 27px 22px; text-align: center; }
  .download-copy h2 { font-size: 24px; }
  .download-cta { min-height: 68px; }
  .footer-shell { grid-template-columns: 1fr; justify-items: center; gap: 22px; text-align: center; }
  .site-footer ul { flex-wrap: wrap; justify-content: center; gap: 12px 19px; }
  .footer-brand { justify-content: center; }
  .back-top { right: 16px; bottom: 16px; width: 44px; height: 44px; }
}

@media (max-width: 430px) {
  .section-shell, .nav-shell, .footer-shell { width: calc(100% - 24px); }
  .brand-copy span { font-size: 11px; }
  .header-download .icon { display: none; }
  .hero { padding-top: 38px; }
  .hero h1 { font-size: 42px; }
  .hero h2 { font-size: 24px; }
  .feature-tags { gap: 7px; }
  .feature-tags span { min-height: 38px; padding: 0 9px; font-size: 12px; }
  .hero-download { width: 100%; min-width: 0; }
  .phone-frame { width: 290px; }
  .device-meter { grid-template-columns: 1fr; gap: 6px; }
  .connection-actions button { min-height: 72px; }
  .screen-card { flex-basis: 218px; }
}