:root {
  --ink: #202624;
  --muted: #68716e;
  --paper: #f2efe8;
  --surface: #fffdf8;
  --line: #d9d4c9;
  --accent: #c9683e;
  --accent-dark: #8f442a;
  --teal: #2f6c67;
  --teal-soft: #dcebe6;
  --shadow: 0 24px 70px rgba(37, 42, 39, .13);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

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

.section-shell {
  width: min(1160px, calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1280px, calc(100% - 48px));
  min-height: 78px;
  margin: 0 auto;
  border-bottom: 1px solid var(--line);
}

.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--surface);
  background: var(--teal);
  border-radius: 6px;
  font-family: Georgia, serif;
  font-size: 21px;
}
.brand strong { display: block; font-size: 17px; letter-spacing: .06em; }
.brand small { display: block; color: var(--muted); font-size: 9px; letter-spacing: .18em; }
.site-nav { display: flex; gap: 32px; color: var(--muted); font-size: 14px; }
.site-nav a:hover, .text-link:hover { color: var(--accent-dark); }
.text-link { color: var(--accent-dark); font-size: 14px; font-weight: 700; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, .94fr) minmax(420px, 1.06fr);
  gap: 72px;
  align-items: center;
  min-height: 660px;
  padding-top: 78px;
  padding-bottom: 88px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .18em;
  text-transform: uppercase;
}

h1, h2, p { margin-top: 0; }
h1 { max-width: 680px; margin-bottom: 22px; font-family: Georgia, "Songti SC", serif; font-size: 56px; line-height: 1.14; letter-spacing: 0; }
h2 { margin-bottom: 14px; font-family: Georgia, "Songti SC", serif; font-size: 33px; line-height: 1.24; letter-spacing: 0; }
.hero-lead { max-width: 540px; margin-bottom: 30px; color: var(--muted); font-size: 17px; }
.action-row { display: flex; flex-wrap: wrap; gap: 12px; }
.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 800;
  transition: transform .2s ease, background-color .2s ease, color .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fffaf2; background: var(--accent); }
.button-primary:hover { background: var(--accent-dark); }
.button-secondary { color: var(--teal); border-color: var(--teal); background: transparent; }
.button-secondary:hover { color: #fff; background: var(--teal); }
.button.is-disabled { cursor: not-allowed; opacity: .45; pointer-events: none; }
.platform-note, .wechat-hint { max-width: 560px; margin: 15px 0 0; color: var(--muted); font-size: 12px; }
.wechat-hint { padding: 10px 12px; color: var(--accent-dark); border-left: 3px solid var(--accent); background: #f7e8de; }

.hero-visual { position: relative; padding: 34px 28px 25px; }
.hero-visual::before { position: absolute; top: 0; right: 0; bottom: 0; left: 0; z-index: -1; border: 1px solid var(--line); background: #e6e0d3; content: ""; transform: rotate(2.5deg); }
.app-window { overflow: hidden; border: 1px solid #bec4bd; border-radius: 8px; background: var(--surface); box-shadow: var(--shadow); }
.window-bar { display: flex; align-items: center; gap: 6px; height: 37px; padding: 0 15px; border-bottom: 1px solid #dfe2dc; background: #f7f7f2; }
.window-dot { width: 7px; height: 7px; border-radius: 50%; background: #bdc4bd; }
.window-title { margin-left: 10px; color: var(--muted); font-size: 11px; }
.window-body { padding: 30px; }
.window-toolbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.window-label { font-size: 22px; font-weight: 800; }
.sync-state { color: var(--teal); font-size: 11px; font-weight: 800; }
.sync-state i { display: inline-block; width: 7px; height: 7px; margin-right: 5px; border-radius: 50%; background: var(--teal); }
.metric-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 24px; }
.metric-grid div { padding: 13px; border: 1px solid var(--line); background: #fbfaf5; }
.metric-grid small, .fabric-row small { display: block; color: var(--muted); font-size: 10px; }
.metric-grid strong { display: block; margin-top: 2px; font-size: 25px; }
.fabric-list { border-top: 1px solid var(--line); }
.fabric-row { display: flex; align-items: center; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.fabric-row > span:nth-child(2) { flex: 1; }
.fabric-row b { display: block; font-size: 13px; }
.fabric-row em { color: var(--teal); font-size: 10px; font-style: normal; }
.swatch { width: 35px; height: 35px; border-radius: 4px; }
.swatch-olive { background: #8b9273; }
.swatch-rust { background: #b95e48; }
.swatch-blue { background: #6b8792; }
.hero-caption { display: flex; justify-content: space-between; padding: 17px 5px 0; color: var(--muted); font-size: 11px; letter-spacing: .08em; }

.value-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; padding: 30px 0 80px; border-top: 1px solid var(--line); }
.value-strip article { position: relative; padding-left: 44px; }
.value-index { position: absolute; top: 2px; left: 0; color: var(--accent); font-family: Georgia, serif; font-size: 14px; font-weight: 800; }
.value-strip h2 { margin-bottom: 8px; font-family: inherit; font-size: 19px; }
.value-strip p { margin-bottom: 0; color: var(--muted); font-size: 14px; }

.workflow { padding: 60px 0 110px; }
.section-heading { max-width: 680px; margin-bottom: 38px; }
.section-heading > p:last-child { margin-bottom: 0; color: var(--muted); }
.workflow-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.screen-placeholder { margin: 0; padding: 22px 22px 24px; border: 1px solid var(--line); background: rgba(255, 253, 248, .65); }
.phone-frame { width: min(100%, 205px); min-height: 278px; margin: 0 auto 23px; padding: 15px; border: 6px solid #25312e; border-radius: 19px; background: #faf9f4; box-shadow: 0 12px 25px rgba(37, 42, 39, .12); }
.phone-top { margin-bottom: 15px; font-size: 11px; font-weight: 800; }
.phone-photo, .preview-photo { display: grid; height: 105px; place-items: center; margin-bottom: 14px; color: rgba(255, 255, 255, .8); background: #84968f; font-size: 11px; }
.phone-first .phone-photo { background: #87907b; }
.phone-second { background: #eff4f0; }
.phone-third { background: #f7f3eb; }
.phone-lines i { display: block; height: 6px; margin: 9px 0; background: #d8ddd5; }
.phone-button { margin-top: 18px; padding: 8px; color: #fff; background: var(--teal); font-size: 10px; font-weight: 800; text-align: center; }
.queue-line { display: flex; justify-content: space-between; padding: 13px 0; border-bottom: 1px solid #d2ddd5; font-size: 10px; }
.queue-line em { color: var(--teal); font-style: normal; }
.preview-title { margin-bottom: 4px; font-size: 16px; font-weight: 800; }
.preview-meta { color: var(--muted); font-size: 9px; }
.screen-placeholder figcaption strong, .screen-placeholder figcaption span { display: block; }
.screen-placeholder figcaption strong { margin-bottom: 5px; font-size: 14px; }
.screen-placeholder figcaption span { color: var(--muted); font-size: 12px; }

.download { display: grid; grid-template-columns: minmax(0, 1fr) minmax(430px, .95fr); gap: 60px; align-items: center; padding: 72px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.download-copy > p:not(.eyebrow) { max-width: 530px; color: var(--muted); }
.config-status { padding: 12px 14px; color: var(--accent-dark); border-left: 3px solid var(--accent); background: #f7e8de; font-size: 12px; }
.qr-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.qr-card { padding: 18px; border: 1px solid var(--line); background: var(--surface); text-align: center; }
.qr-box { display: grid; width: 176px; height: 176px; max-width: 100%; margin: 0 auto 15px; place-items: center; background: #fff; }
.qr-box canvas { display: block; max-width: 100%; }
.qr-empty { color: var(--muted); font-size: 11px; }
.qr-card strong, .qr-card span { display: block; }
.qr-card strong { margin-bottom: 3px; font-size: 14px; }
.qr-card > span { color: var(--muted); font-size: 11px; }

.closing { display: flex; align-items: end; justify-content: space-between; gap: 30px; padding-top: 92px; padding-bottom: 92px; }
.closing h2 { max-width: 580px; margin-bottom: 0; font-size: 42px; }
.site-footer { display: flex; justify-content: space-between; padding-top: 22px; padding-bottom: 28px; color: var(--muted); border-top: 1px solid var(--line); font-size: 11px; }

@media (max-width: 850px) {
  .hero { grid-template-columns: 1fr; gap: 42px; min-height: auto; padding-top: 56px; }
  .hero-copy { max-width: 680px; }
  .value-strip, .workflow-grid { grid-template-columns: 1fr; }
  .value-strip { gap: 23px; }
  .workflow-grid { max-width: 480px; }
  .download { grid-template-columns: 1fr; gap: 34px; }
  .closing h2 { font-size: 34px; }
}

@media (max-width: 560px) {
  .section-shell, .site-header { width: min(100% - 30px, 1160px); }
  .site-header { min-height: 68px; }
  .site-nav { display: none; }
  h1 { font-size: 40px; }
  h2 { font-size: 29px; }
  .hero { padding-top: 42px; padding-bottom: 64px; }
  .hero-visual { padding: 20px 12px 15px; }
  .window-body { padding: 20px 15px; }
  .metric-grid strong { font-size: 21px; }
  .hero-caption { font-size: 9px; }
  .qr-grid { grid-template-columns: 1fr; max-width: 240px; }
  .closing { display: block; padding-top: 64px; padding-bottom: 64px; }
  .closing .button { margin-top: 24px; }
  .site-footer { display: block; }
  .site-footer span { display: block; margin-top: 6px; }
}