/* 系统字体与本地资源让首屏无需等待第三方服务。 */
:root { color-scheme: light dark; background: light-dark(#f7f7f0, #20251f); }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: "Segoe UI", "Microsoft YaHei", sans-serif; font-size: 14px; line-height: 1.5; }
button, summary, input[type="range"] { cursor: pointer; }
button:disabled { cursor: default; opacity: .65; }
:focus-visible { outline: 2px solid light-dark(#326345, #b8db9b); outline-offset: 4px; }
.bes-skip { position: absolute; left: 16px; top: 8px; z-index: 2; padding: 10px 16px; background: light-dark(#ffffff, #292f29); color: light-dark(#263c31, #ebf1e6); transform: translateY(-160%); }
.bes-skip:focus { transform: translateY(0); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
#bes-software {
  --bes-page: light-dark(#f7f7f0, #20251f);
  --bes-panel: light-dark(#ffffff, #292f29);
  --bes-ink: light-dark(#263c31, #ebf1e6);
  --bes-muted: light-dark(#667067, #b2bcb0);
  --bes-rule: light-dark(#dde3d8, #424e40);
  --bes-accent: light-dark(#326345, #b8db9b);
  --bes-inverse: light-dark(#ffffff, #203222);
  --bes-radius: 16px;
  background: var(--bes-page); color: var(--bes-ink); font-family: "Segoe UI", "Microsoft YaHei", sans-serif;
  max-width: 1120px; margin: 0 auto; padding: 0 40px; box-sizing: border-box; text-align: left; width: 100%; overflow-wrap: anywhere;
}
#bes-software * { box-sizing: border-box; }
#bes-software a { color: inherit; text-decoration: none; }
#bes-software a:hover { text-decoration: underline; text-underline-offset: 4px; }
#bes-software button, #bes-software input { font: inherit; }
#bes-software button { color: var(--bes-ink); }
#bes-software h1, #bes-software h2, #bes-software h3, #bes-software p { margin: 0; }
#bes-software [hidden] { display: none !important; }
#bes-software i, #bes-software svg.lucide { width: 16px; height: 16px; flex: 0 0 auto; }
#bes-software .bes-header { min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 16px; border-bottom: 1px solid var(--bes-rule); }
#bes-software .bes-wordmark { font-size: 17px; font-weight: 600; letter-spacing: -0.5px; display: flex; align-items: baseline; gap: 7px; white-space: nowrap; }
#bes-software .bes-wordmark > span:first-child { font-size: 26px; font-weight: 750; letter-spacing: -1.4px; }
#bes-software .bes-wordmark .bes-dot { font-size: 28px; color: var(--bes-accent); margin-left: -5px; }
#bes-software .bes-header nav { display: flex; align-items: center; gap: 22px; font-size: 13px; }
#bes-software nav a, #bes-software .bes-work-foot a, #bes-software .bes-footer a { display: inline-flex; align-items: center; gap: 4px; min-height: 36px; }
#bes-software .bes-hero { padding: 43px 0 44px; }
#bes-software .bes-eyebrow { display: flex; align-items: center; gap: 8px; font-size: 11px; font-weight: 600; letter-spacing: 1px; }
#bes-software .bes-seed { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--bes-accent); }
#bes-software .bes-since { margin-left: auto; color: var(--bes-muted); font-weight: 400; letter-spacing: 0; }
#bes-software h1 { font-size: clamp(29px, 4.7vw, 47px); line-height: 1.42; font-weight: 650; letter-spacing: -1.8px; padding: 24px 0 18px; }
#bes-software .bes-emphasis { color: var(--bes-accent); }
#bes-software .bes-intro { font-size: 14px; line-height: 1.9; color: var(--bes-muted); }
#bes-software .bes-hero-bottom { margin-top: 23px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
#bes-software .bes-primary { background: var(--bes-accent); color: var(--bes-inverse); border-radius: 8px; min-height: 43px; padding: 10px 17px; font-size: 13px; display: inline-flex; align-items: center; gap: 13px; }
#bes-software .bes-personal { text-align: right; font-size: 13px; line-height: 1.8; }
#bes-software .bes-personal > span { color: var(--bes-muted); }
#bes-software .bes-section-heading { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 8px; margin-bottom: 17px; }
#bes-software .bes-section-heading h2 { font-size: 18px; font-weight: 600; letter-spacing: -0.4px; }
#bes-software .bes-section-heading > span { color: var(--bes-muted); font-size: 11px; }
#bes-software .bes-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 18px; }
#bes-software .bes-work { background: var(--bes-panel); border: 1px solid var(--bes-rule); border-radius: var(--bes-radius); padding: 18px; min-width: 0; }
#bes-software .bes-lyric { --bes-product: light-dark(#69538c, #c9afe9); --bes-tint: light-dark(#f3eff9, #34303f); }
#bes-software .bes-desktop { --bes-product: light-dark(#97702a, #e5c77e); --bes-tint: light-dark(#fcf5e6, #393529); }
#bes-software .bes-fuel { --bes-product: light-dark(#447349, #b3d3a3); --bes-tint: light-dark(#f0f6e9, #303a2b); }
#bes-software .bes-map { --bes-product: light-dark(#366685, #a8cce4); --bes-tint: light-dark(#eaf3f8, #2b3740); }
#bes-software .bes-tools { --bes-product: light-dark(#326345, #b8db9b); --bes-tint: light-dark(#edf2e7, #303d29); }
#bes-software .bes-tool-preview { display: flex; align-items: center; gap: 15px; padding-top: 19px; color: var(--bes-product); }
#bes-software .bes-tool-preview > svg.lucide { width: 35px; height: 35px; }
#bes-software .bes-tool-preview strong { display: block; font-size: 16px; font-weight: 600; }
#bes-software .bes-tool-preview span { display: block; margin-top: 6px; font-size: 11px; color: var(--bes-muted); }
#bes-software .bes-tool-launch { display: inline-flex; align-items: center; gap: 5px; background: var(--bes-panel); border: 1px solid var(--bes-rule); border-radius: 6px; padding: 7px 8px; font-size: 11px; min-height: 32px; }
#bes-software .bes-work-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 13px; font-size: 12px; }
#bes-software .bes-topic { display: inline-flex; align-items: center; gap: 7px; color: var(--bes-product); }
#bes-software .bes-work-index { color: var(--bes-muted); font-size: 11px; font-variant-numeric: tabular-nums; }
#bes-software .bes-playground { background: var(--bes-tint); border-radius: max(4px, calc(var(--bes-radius) - 5px)); min-height: 180px; height: 180px; padding: 16px; display: flex; flex-direction: column; justify-content: space-between; }
#bes-software .bes-play-controls { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 9px; justify-content: space-between; }
#bes-software .bes-play-controls button { display: inline-flex; align-items: center; justify-content: center; gap: 5px; background: var(--bes-panel); border: 1px solid var(--bes-rule); border-radius: 6px; padding: 7px 8px; font-size: 11px; min-height: 32px; }
#bes-software .bes-play-controls button:hover { color: var(--bes-product); }
#bes-software .bes-demo-note { color: var(--bes-muted); font-size: 11px; line-height: 1.6; }
#bes-software .bes-lyric-lines { font-size: 13px; line-height: 2.25; }
#bes-software .bes-lyric-lines > div { display: flex; gap: 12px; color: var(--bes-muted); white-space: nowrap; }
#bes-software .bes-lyric-lines > div > span:first-child { width: 69px; flex: 0 0 69px; font-family: Consolas, monospace; font-size: 11px; font-variant-numeric: tabular-nums; }
#bes-software .bes-lyric-lines > div.is-current { color: var(--bes-product); font-weight: 600; }
#bes-software .bes-work-title { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 3px 8px; margin-top: 17px; }
#bes-software .bes-work-title h3 { font-size: 21px; font-weight: 650; letter-spacing: -0.7px; }
#bes-software .bes-platform { color: var(--bes-muted); font-size: 11px; }
#bes-software .bes-description { font-size: 12px; line-height: 1.8; margin-top: 7px; min-height: 43px; }
#bes-software .bes-work-foot { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 4px; border-top: 1px solid var(--bes-rule); margin-top: 9px; padding-top: 7px; font-size: 11px; }
#bes-software .bes-work-foot > span { color: var(--bes-muted); }
#bes-software .bes-work-foot a { font-weight: 600; }
#bes-software .bes-stage { height: 113px; position: relative; overflow: hidden; }
#bes-software .bes-window-outline { position: absolute; inset: 1px 0 9px; border: 1px solid color-mix(in srgb, var(--bes-product) 24%, transparent); border-radius: 6px; padding: 0 7px; }
#bes-software .bes-window-outline > span { display: inline-block; width: 4px; height: 4px; background: var(--bes-product); opacity: 0.45; border-radius: 50%; margin-right: 3px; }
#bes-software .bes-character { position: absolute; left: 25px; top: 38px; width: 41px; height: 51px; transform-origin: center 90%; }
#bes-software .bes-character-face { position: relative; z-index: 1; color: var(--bes-product); width: 16px; height: 16px; transform: scale(2.4); transform-origin: top left; }
#bes-software .bes-character-face svg.lucide { width: 16px; height: 16px; stroke-width: 1.6; }
#bes-software .bes-leg { position: absolute; top: 33px; width: 4px; height: 13px; background: var(--bes-product); border-radius: 2px; transform-origin: top; }
#bes-software .bes-left-leg { left: 10px; transform: rotate(10deg); }
#bes-software .bes-right-leg { right: 10px; transform: rotate(-12deg); }
#bes-software .bes-speech { position: absolute; top: 46px; right: 13px; max-width: 63%; color: var(--bes-product); font-size: 11px; line-height: 1.6; }
#bes-software .bes-character.is-playing { animation: bes-strut 1.2s ease-in-out 1; }
#bes-software .bes-character.is-playing .bes-left-leg { animation: bes-step .2s alternate 6; }
#bes-software .bes-character.is-playing .bes-right-leg { animation: bes-step .2s alternate-reverse 6; }
@keyframes bes-strut { 0%,100% { transform: translate(0,0) rotate(0); } 25% { transform: translate(18px,-9px) rotate(-12deg); } 50% { transform: translate(35px,0) rotate(9deg); } 75% { transform: translate(14px,-8px) rotate(-8deg); } }
@keyframes bes-step { from { transform: rotate(-28deg); } to { transform: rotate(28deg); } }
#bes-software .bes-trip-summary { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; padding-top: 7px; }
#bes-software .bes-trip-summary label, #bes-software .bes-trip-cost > span { display: block; font-size: 11px; color: var(--bes-muted); margin-bottom: 6px; }
#bes-software .bes-trip-summary strong { display: block; font-weight: 500; font-size: 27px; line-height: 1.3; letter-spacing: -1px; font-variant-numeric: tabular-nums; }
#bes-software .bes-trip-summary small { font-size: 12px; letter-spacing: 0; }
#bes-software .bes-trip-cost { text-align: right; color: var(--bes-product); }
#bes-software .bes-fuel-play input { width: 100%; accent-color: var(--bes-product); margin: 7px 0; min-height: 22px; }
#bes-software .bes-map-play { padding-top: 4px; }
#bes-software .bes-map-svg { width: 100%; height: 124px; display: block; }
#bes-software .bes-ocean { fill: var(--bes-tint); }
#bes-software .bes-land { fill: var(--bes-product); opacity: 0.74; }
#bes-software .bes-graticule { fill: none; stroke: var(--bes-product); opacity: 0.22; stroke-width: 0.6; }
#bes-software .bes-gallery-note { font-size: 11px; line-height: 1.7; color: var(--bes-muted); margin-top: 12px; }
#bes-software .bes-story { margin-top: 42px; padding: 30px 0; display: grid; grid-template-columns: 1fr 2.1fr; gap: 32px; border-top: 1px solid var(--bes-rule); }
#bes-software .bes-story-heading > .bes-eyebrow { color: var(--bes-muted); }
#bes-software .bes-story-heading h2 { font-size: 27px; font-weight: 500; line-height: 1.6; margin-top: 12px; letter-spacing: -1px; }
#bes-software .bes-signature { display: block; font-family: Georgia, serif; font-style: italic; font-size: 21px; margin-top: 18px; color: var(--bes-accent); }
#bes-software .bes-story-lead { font-size: 14px; line-height: 1.95; }
#bes-software details { margin-top: 19px; }
#bes-software summary { list-style: none; display: flex; align-items: center; gap: 10px; justify-content: space-between; font-size: 12px; font-weight: 600; min-height: 39px; }
#bes-software summary::-webkit-details-marker { display: none; }
#bes-software details[open] summary svg { transform: rotate(180deg); }
#bes-software .bes-story-body { color: var(--bes-muted); font-size: 12px; line-height: 1.9; }
#bes-software .bes-story-body p + p { margin-top: 7px; }
#bes-software .bes-beliefs { display: flex; flex-wrap: wrap; gap: 8px 17px; margin-top: 20px; font-size: 11px; color: var(--bes-accent); }
#bes-software .bes-beliefs span { display: inline-flex; align-items: center; gap: 6px; }
#bes-software .bes-sustain { color: var(--bes-muted); font-size: 11px; line-height: 1.9; margin-top: 13px; }
#bes-software .bes-support { border-top: 1px solid var(--bes-rule); padding: 24px 0 27px; }
#bes-software .bes-support-invitation { display: grid; grid-template-columns: 150px minmax(0, 1fr) auto; align-items: center; gap: 22px; }
#bes-software .bes-garden { display: flex; align-items: center; flex-direction: column; gap: 5px; }
#bes-software .bes-plant-art { display: block; position: relative; width: 144px; height: 158px; color: var(--bes-accent); }
#bes-software .bes-plant-halo { position: absolute; width: 116px; height: 116px; left: 14px; top: 25px; border-radius: 50%; background: light-dark(#e7eedc, #303d29); }
#bes-software .bes-tree-canvas { position: relative; display: block; width: 144px; height: 158px; }
#bes-software [data-tree-color="outline"] { color: light-dark(#326345, #afcc91); }
#bes-software [data-tree-color="leaf"] { color: light-dark(#6d945e, #779b66); }
#bes-software [data-tree-color="light"] { color: light-dark(#99b976, #aec889); }
#bes-software [data-tree-color="trunk"] { color: light-dark(#826442, #bd9e73); }
#bes-software [data-tree-color="soil"] { color: light-dark(#94794d, #b9a17a); }
#bes-software .bes-garden-hint { font-size: 11px; color: var(--bes-muted); line-height: 1.5; text-align: center; }
#bes-software .bes-support-copy h2 { font-size: 22px; font-weight: 550; margin-bottom: 9px; letter-spacing: -0.6px; }
#bes-software .bes-support-copy p { font-size: 13px; line-height: 1.9; }
#bes-software .bes-garden-response { display: block; margin-top: 9px; font-size: 11px; color: var(--bes-muted); line-height: 1.8; min-height: 20px; }
#bes-software .bes-support-trigger { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 42px; padding: 10px 16px; border: 1px solid var(--bes-rule); border-radius: 8px; background: var(--bes-panel); color: var(--bes-accent); font-size: 13px; white-space: nowrap; }
#bes-software .bes-support-trigger:hover { background: light-dark(#ecf2e6, #33442f); border-color: var(--bes-accent); }
#bes-software .bes-water { position: absolute; color: light-dark(#497e9c, #a3cce2); top: 32px; opacity: 0; pointer-events: none; }
#bes-software .bes-water-one { left: 59px; }
#bes-software .bes-water-two { left: 83px; }
#bes-software .bes-water-three { left: 38px; }
#bes-software .bes-plant-art.is-watering .bes-water { animation: bes-water-drop .45s ease-in 1; }
#bes-software .bes-plant-art.is-watering .bes-water-two { animation-delay: .08s; }
#bes-software .bes-plant-art.is-watering .bes-water-three { animation-delay: .16s; }
@keyframes bes-water-drop { 0% { opacity: 0; transform: translateY(-12px) scale(.8); } 20% { opacity: .9; } 80% { opacity: .9; } 100% { opacity: 0; transform: translateY(72px) scale(.6); } }
#bes-software .bes-support-panel { margin-top: 23px; padding: 22px; background: var(--bes-panel); border: 1px solid var(--bes-rule); border-radius: var(--bes-radius); }
#bes-software .bes-support-panel-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 20px; font-size: 12px; color: var(--bes-muted); }
#bes-software .bes-support-panel-head button { display: inline-flex; align-items: center; gap: 4px; min-height: 36px; padding: 6px 0 6px 10px; border: 0; background: transparent; font-size: 12px; white-space: nowrap; }
#bes-software .bes-support-panel-body { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 320px); gap: 26px; align-items: start; }
#bes-software .bes-support-options { min-width: 0; padding-top: 5px; }
#bes-software .bes-support-options h3 { font-size: 21px; font-weight: 550; line-height: 1.5; }
#bes-software .bes-support-note { font-size: 13px; line-height: 1.9; margin-top: 12px; color: var(--bes-muted); }
#bes-software .bes-payment-methods { display: flex; gap: 10px; margin-top: 25px; }
#bes-software .bes-payment-methods button { display: inline-flex; align-items: center; justify-content: center; font-size: 13px; min-height: 40px; min-width: 82px; padding: 8px 14px; border: 1px solid var(--bes-rule); border-radius: 7px; background: var(--bes-panel); color: var(--bes-ink); }
#bes-software .bes-payment-methods button[aria-pressed="true"] { background: var(--bes-accent); color: var(--bes-inverse); border-color: var(--bes-accent); }
#bes-software .bes-payment-payee { margin-top: 13px; font-size: 12px; line-height: 1.8; }
#bes-software .bes-support-instruction { margin-top: 18px; font-size: 12px; line-height: 1.9; color: var(--bes-muted); max-width: 330px; }
#bes-software .bes-payment-original { display: inline-flex; align-items: center; gap: 5px; min-height: 44px; margin-top: 5px; font-size: 12px; color: var(--bes-accent); }
#bes-software .bes-payment-picture { max-width: 320px; width: 100%; justify-self: center; }
#bes-software .bes-payment-picture img { display: block; width: 100%; height: auto; object-fit: contain; }
#bes-software .bes-footer { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; padding: 15px 0 22px; border-top: 1px solid var(--bes-rule); color: var(--bes-muted); font-size: 11px; }
@media (max-width: 700px) {
  #bes-software { padding: 0 22px; }
  #bes-software .bes-grid { gap: 12px; }
  #bes-software .bes-work { padding: 13px; }
  #bes-software .bes-playground { padding: 11px; height: 180px; }
  #bes-software .bes-map-play { padding-top: 0; }
  #bes-software .bes-lyric-lines { font-size: 12px; }
  #bes-software .bes-lyric-lines > div { gap: 5px; }
  #bes-software .bes-lyric-lines > div > span:first-child { width: 69px; flex-basis: 69px; font-size: 11px; }
  #bes-software .bes-story { grid-template-columns: 1fr 2fr; gap: 22px; }
  #bes-software .bes-story-heading h2 { font-size: 24px; }
  #bes-software .bes-support-invitation { grid-template-columns: 144px minmax(0, 1fr); gap: 15px; }
  #bes-software .bes-garden { grid-row: span 2; }
  #bes-software .bes-support-trigger { justify-self: start; }
  #bes-software .bes-support-panel-body { grid-template-columns: minmax(0, 1fr); gap: 18px; }
}
@media (max-width: 590px) {
  #bes-software { padding: 0 18px; }
  #bes-software .bes-header { min-height: 65px; }
  #bes-software .bes-header nav { gap: 13px; font-size: 11px; }
  #bes-software .bes-header nav a:last-child svg { display: none; }
  #bes-software .bes-wordmark { font-size: 14px; }
  #bes-software .bes-wordmark > span:first-child { font-size: 23px; }
  #bes-software .bes-hero { padding: 30px 0; }
  #bes-software h1 { font-size: clamp(25px, 6.2vw, 35px); letter-spacing: -1px; padding-top: 20px; }
  #bes-software .bes-intro { font-size: 12px; }
  #bes-software .bes-hero-bottom { flex-wrap: wrap; }
  #bes-software .bes-personal { font-size: 11px; text-align: left; }
  #bes-software .bes-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  #bes-software .bes-work { padding: 17px; }
  #bes-software .bes-playground { padding: 15px; }
  #bes-software .bes-map-play { padding-top: 3px; }
  #bes-software .bes-lyric-lines { font-size: 13px; }
  #bes-software .bes-lyric-lines > div > span:first-child { font-size: 11px; width: 69px; flex-basis: 69px; }
  #bes-software .bes-lyric-lines > div { gap: 7px; }
  #bes-software .bes-story { grid-template-columns: 1fr; gap: 22px; }
  #bes-software .bes-story-heading h2 br { display: none; }
  #bes-software .bes-signature { margin-top: 8px; }
  #bes-software .bes-support-invitation { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  #bes-software .bes-garden { grid-row: auto; justify-self: center; }
  #bes-software .bes-support-copy { text-align: center; }
  #bes-software .bes-support-copy p { font-size: 12px; }
  #bes-software .bes-support-copy p br { display: none; }
  #bes-software .bes-support-trigger { justify-self: center; }
  #bes-software .bes-support-panel { padding: 16px; }
}
@media (pointer: coarse) {
  #bes-software button, #bes-software nav a, #bes-software .bes-work-foot a, #bes-software summary, #bes-software .bes-footer a { min-height: 44px; }
  #bes-software .bes-playground { min-height: 192px; height: 192px; }
}
@media (prefers-reduced-motion: reduce) {
  #bes-software .bes-character, #bes-software .bes-leg { animation: none !important; }
  #bes-software .bes-water { animation: none !important; }
}
#bes-software .bes-noscript { padding: 18px 0; font-size: 13px; line-height: 1.8; }