:root {
  --scrollbar-thumb: #aebbc0;
  --scrollbar-thumb-hover: #82959d;
}
* { box-sizing: border-box; scrollbar-color: var(--scrollbar-thumb) transparent; scrollbar-width: thin; }
*::-webkit-scrollbar { width: 6px; height: 6px; }
*::-webkit-scrollbar-track, *::-webkit-scrollbar-corner { background: transparent; }
*::-webkit-scrollbar-thumb { border: 1px solid transparent; border-radius: 999px; background: var(--scrollbar-thumb); background-clip: padding-box; }
*::-webkit-scrollbar-thumb:hover { background: var(--scrollbar-thumb-hover); background-clip: padding-box; }
body { margin: 0; font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; }
button { font: inherit; }
a { color: inherit; text-decoration: none; }

::view-transition-old(root), ::view-transition-new(root) { animation: none; mix-blend-mode: normal; }
::view-transition-old(root) { z-index: 1; }
::view-transition-new(root) { z-index: 9999; }

html[data-landing-theme="dark"] {
  color-scheme: dark;
  --landing-art-fallback: url("landing-data-landscape.png");
  --landing-art-image: image-set(url("landing-data-landscape.avif") type("image/avif"), url("landing-data-landscape.webp") type("image/webp"), var(--landing-art-fallback));
  --landing-bg: #05090d;
  --landing-text: #f6f2e9;
  --landing-heading: #f8f3ea;
  --landing-muted: #b9c0c2;
  --landing-soft: #88ada6;
  --landing-faint: #53605f;
  --landing-line: #3f4d4c;
  --landing-accent: #e7c16b;
  --landing-accent-strong: #f6d995;
  --landing-focus: #a8e5d9;
  --landing-track: #34413f;
  --landing-nav-border: rgba(232,228,220,.14);
  --landing-pointer-glow: rgba(111,222,204,.13);
  --landing-map-glow: rgba(92,181,166,.18);
  --landing-hub-glow: rgba(125,237,216,.38);
  --landing-page-glow: rgba(231,193,107,.17);
  --landing-orbit-dot: #f0c56f;
  --landing-orbit-glow: rgba(126,218,201,.72);
}
html[data-landing-theme="light"] {
  color-scheme: light;
  --landing-art-fallback: url("landing-data-landscape-light.png");
  --landing-art-image: image-set(url("landing-data-landscape-light.avif") type("image/avif"), url("landing-data-landscape-light.webp") type("image/webp"), var(--landing-art-fallback));
  --landing-bg: #f3f1e9;
  --landing-text: #202a2d;
  --landing-heading: #162125;
  --landing-muted: #536165;
  --landing-soft: #356b65;
  --landing-faint: #7a8786;
  --landing-line: #9eaaa6;
  --landing-accent: #936b18;
  --landing-accent-strong: #7c5810;
  --landing-focus: #246f67;
  --landing-track: #c7cfca;
  --landing-nav-border: rgba(26,42,46,.14);
  --landing-pointer-glow: rgba(28,111,101,.12);
  --landing-map-glow: rgba(61,126,116,.12);
  --landing-hub-glow: rgba(36,126,113,.2);
  --landing-page-glow: rgba(147,107,24,.12);
  --landing-orbit-dot: #287f77;
  --landing-orbit-glow: rgba(40,127,119,.48);
}
.landing-body { min-height: 100svh; overflow: hidden; background: var(--landing-bg); color: var(--landing-text); transition: background .24s ease,color .24s ease; }
.landing-nav { position: fixed; z-index: 10; top: 0; right: 0; left: 0; display: flex; height: 72px; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--landing-nav-border); padding: 0 clamp(22px,4vw,64px); background: var(--landing-bg); transition: background .24s ease,border-color .24s ease; }
.landing-brand { display: inline-flex; align-items: center; gap: 9px; font-size: 24px; font-weight: 780; letter-spacing: .015em; }
.landing-brand-mark { display: block; width: 31px; height: 31px; object-fit: contain; }
.landing-nav nav { display: flex; align-items: center; gap: clamp(20px,3vw,46px); font-size: 14px; }
.landing-nav nav a { color: var(--landing-text); transition: color .18s ease; }
.landing-nav nav a:hover { color: var(--landing-soft); }
.landing-login-link { padding-bottom: 3px; border-bottom: 1px solid var(--landing-line); }
.landing-theme-toggle { display: inline-flex; width: 32px; height: 32px; flex: 0 0 32px; align-items: center; justify-content: center; border: 0; background: transparent; padding: 0; color: var(--landing-muted); cursor: pointer; font: inherit; }
.landing-theme-icon { width: 17px; height: 17px; flex: 0 0 17px; }
.landing-theme-icon-moon, .landing-theme-icon-sun { transform-origin: center; transition: opacity .18s ease,transform .22s ease; }
.landing-theme-icon[data-next-theme="light"] .landing-theme-icon-moon, .landing-theme-icon[data-next-theme="dark"] .landing-theme-icon-sun { opacity: 0; transform: scale(.55) rotate(-18deg); }
.landing-theme-icon[data-next-theme="light"] .landing-theme-icon-sun, .landing-theme-icon[data-next-theme="dark"] .landing-theme-icon-moon { opacity: 1; transform: scale(1) rotate(0); }
.landing-theme-toggle:hover { color: var(--landing-soft); }
.landing-hero { --landing-pointer-x: 50%; --landing-pointer-y: 54%; --landing-shift-x: 0px; --landing-shift-y: 0px; --landing-flow-shift-x: 0px; --landing-flow-shift-y: 0px; --landing-ppt-shift-x: 0px; --landing-ppt-shift-y: 0px; position: relative; isolation: isolate; min-height: 100svh; overflow: hidden; padding: 132px clamp(24px,4vw,64px) 104px; }
.landing-hero::after { position: absolute; z-index: 0; top: var(--landing-pointer-y); left: var(--landing-pointer-x); width: 58px; height: 58px; border: 1px solid color-mix(in srgb,var(--landing-focus) 42%,transparent); border-radius: 50%; content: ""; opacity: 0; pointer-events: none; transform: translate(-50%,-50%); transition: opacity .24s ease; }
.landing-hero.is-pointer-active::after { opacity: .62; }
.landing-art { position: absolute; z-index: -1; inset: 72px 0 0; contain: layout paint; overflow: hidden; pointer-events: none; }
.landing-art-base, .landing-ppt-interaction, .landing-delivery-accent { position: absolute; inset: 0; background-image: var(--landing-art-fallback); background-image: var(--landing-art-image); background-repeat: no-repeat; background-position: center; background-size: cover; }
.landing-art-base { opacity: .94; transition: opacity .3s ease; }
html[data-landing-theme="light"] .landing-art-base { opacity: .92; }
.landing-flow-lines { position: absolute; z-index: 1; inset: 0; width: 100%; height: 100%; overflow: visible; opacity: .52; transform: translate3d(var(--landing-flow-shift-x),var(--landing-flow-shift-y),0) scale(1.005); transition: opacity .45s ease,transform .55s cubic-bezier(.2,.8,.2,1); }
.landing-flow-lines path { fill: none; stroke: #8fd8c8; stroke-width: 1.25; stroke-linecap: round; stroke-dasharray: 7 25; vector-effect: non-scaling-stroke; animation: landing-flow-drift 5.4s linear infinite paused; }
.landing-flow-lines path:first-child, .landing-hero.is-story-playing .landing-flow-lines path, .landing-hero.is-pointer-active .landing-flow-lines path { animation-play-state: running; }
.landing-flow-lines path:nth-child(2) { stroke: #d4b267; stroke-dasharray: 5 31; animation-duration: 6.8s; animation-delay: -2.2s; }
.landing-flow-lines path:nth-child(3) { opacity: .65; animation-duration: 7.6s; animation-delay: -4.1s; }
.landing-flow-lines path:nth-child(4) { stroke: #77b9ae; opacity: .72; animation-duration: 6.2s; animation-delay: -1.3s; }
html[data-landing-theme="light"] .landing-flow-lines { opacity: .4; }
html[data-landing-theme="light"] .landing-flow-lines path { stroke: #467c73; }
html[data-landing-theme="light"] .landing-flow-lines path:nth-child(2) { stroke: #a3762d; }
.landing-map-orbit { position: absolute; z-index: 2; inset: 0; width: 100%; height: 100%; overflow: visible; opacity: .82; transition: opacity .35s ease; }
.landing-map-orbit-path { fill: none; stroke: none; }
.landing-map-orbit-runner { color: var(--landing-orbit-dot); filter: drop-shadow(0 0 5px var(--landing-orbit-glow)); }
.landing-map-orbit-flare { fill: var(--landing-orbit-glow); opacity: .2; }
.landing-map-orbit-halo { fill: none; stroke: currentColor; stroke-width: 1.35; transform-box: fill-box; transform-origin: center; animation: landing-map-orbit-pulse 1.45s ease-out infinite; }
.landing-map-orbit-dot { fill: currentColor; stroke: color-mix(in srgb,var(--landing-bg) 78%,transparent); stroke-width: 1; }
html[data-landing-theme="light"] .landing-map-orbit { opacity: .7; }
.landing-hero[data-landing-stage="0"] .landing-map-orbit, .landing-hero[data-landing-stage="1"] .landing-map-orbit, .landing-hero.is-pointer-active .landing-map-orbit { opacity: 1; }
.landing-stage-effects { position: absolute; z-index: 2; inset: 0; pointer-events: none; }
.landing-stage-effects i { position: absolute; display: block; border-radius: 50%; opacity: 0; transform: scale(.78); transition: opacity .38s ease,transform .62s cubic-bezier(.2,.8,.2,1); }
.landing-stage-map { top: 39%; left: 10%; width: clamp(190px,25vw,390px); aspect-ratio: 1.55; background: radial-gradient(ellipse,var(--landing-map-glow),transparent 68%); }
.landing-stage-hub { top: 45%; left: 47%; width: clamp(62px,7vw,112px); aspect-ratio: 1; border: 1px solid color-mix(in srgb,var(--landing-hub-glow) 74%,transparent); background: radial-gradient(circle,var(--landing-hub-glow),transparent 66%); }
.landing-stage-pages { top: 20%; right: 2%; width: clamp(230px,27vw,430px); aspect-ratio: .92; background: radial-gradient(ellipse,var(--landing-page-glow),transparent 70%); }
.landing-hero[data-landing-stage="0"] .landing-stage-map, .landing-hero[data-landing-stage="1"] .landing-stage-hub, .landing-hero[data-landing-stage="4"] .landing-stage-pages, .landing-hero[data-landing-stage="5"] .landing-stage-pages { opacity: 1; transform: scale(1); }
.landing-hero[data-landing-stage="1"] .landing-stage-hub { animation: landing-hub-pulse 1.15s ease-out infinite; }
.landing-hero[data-landing-stage="2"] .landing-stage-hub, .landing-hero[data-landing-stage="3"] .landing-stage-hub { opacity: .58; transform: scale(.86); }
.landing-hero[data-landing-stage="2"] .landing-flow-lines { opacity: .78; }
.landing-hero[data-landing-stage="3"] .landing-flow-lines { opacity: .86; }
.landing-hero[data-landing-stage="3"] .landing-flow-lines path:nth-child(2) { stroke-width: 2.1; }
.landing-ppt-interaction { z-index: 2; opacity: 0; transform: translate3d(var(--landing-ppt-shift-x),var(--landing-ppt-shift-y),0) scale(1.002); transition: opacity .32s ease,transform .5s cubic-bezier(.2,.8,.2,1); -webkit-mask-image: radial-gradient(ellipse 36% 58% at 83% 50%,#000 0 66%,transparent 88%); mask-image: radial-gradient(ellipse 36% 58% at 83% 50%,#000 0 66%,transparent 88%); }
.landing-hero.is-ppt-hover .landing-ppt-interaction { opacity: 0; }
.landing-hero.is-ppt-hover .landing-stage-pages { opacity: .46; transform: scale(1); background: transparent; border: 1px solid color-mix(in srgb,var(--landing-accent) 42%,transparent); }
.landing-hero.is-story-playing[data-landing-stage="4"] .landing-ppt-interaction { opacity: .18; }
.landing-hero.is-story-playing[data-landing-stage="5"] .landing-ppt-interaction { opacity: .28; }
.landing-delivery-accent { z-index: 2; opacity: 0; pointer-events: none; transform: translate3d(2.8%,1.2%,0) scale(.975); transform-origin: 86% 52%; transition: opacity .22s ease; -webkit-mask-image: linear-gradient(90deg,transparent 57%,rgba(0,0,0,.16) 65%,#000 76%); mask-image: linear-gradient(90deg,transparent 57%,rgba(0,0,0,.16) 65%,#000 76%); }
html.is-landing-theme-switching .landing-art-base, html.is-landing-theme-switching .landing-ppt-interaction, html.is-landing-theme-switching .landing-delivery-accent, html.is-landing-theme-switching .landing-stage-effects i, html.is-landing-theme-switching .landing-flow-lines, html.is-landing-theme-switching .landing-flow-lines path, html.is-landing-theme-switching .landing-map-orbit { animation: none !important; transition: none !important; }
html.is-landing-theme-switching .landing-ppt-interaction, html.is-landing-theme-switching .landing-delivery-accent, html.is-landing-theme-switching .landing-stage-effects { opacity: 0 !important; }
html.is-landing-theme-switching .landing-map-orbit { opacity: 0 !important; }
.landing-copy { position: relative; z-index: 2; width: min(620px,47vw); }
.landing-kicker { margin: 0 0 22px; color: var(--landing-soft); font-size: 11px; font-weight: 760; letter-spacing: .18em; }
#landing-title { margin: 0; color: var(--landing-heading); font-family: "Noto Serif CJK SC","Source Han Serif SC","Songti SC","STSong","SimSun",Georgia,serif; font-size: clamp(48px,5.3vw,82px); font-weight: 620; letter-spacing: -.055em; line-height: 1.12; text-wrap: balance; }
.landing-lede { width: min(480px,100%); margin: 24px 0 0; color: var(--landing-muted); font-size: clamp(15px,1.25vw,18px); line-height: 1.75; }
.landing-assurances { display: flex; flex-wrap: wrap; gap: 10px 20px; margin-top: 28px; color: var(--landing-soft); font-size: 12px; }
.landing-assurances span + span::before { margin-right: 20px; color: var(--landing-line); content: "·"; }
.landing-actions { position: absolute; z-index: 3; bottom: 54px; left: clamp(24px,4vw,64px); display: flex; align-items: baseline; gap: 34px; }
.landing-story-action { position: relative; min-width: 238px; border: 0; background: transparent; padding: 8px 0 10px; color: var(--landing-accent-strong); cursor: pointer; font-size: clamp(22px,2.2vw,34px); font-weight: 560; letter-spacing: -.025em; text-align: left; }
.landing-story-action::after { position: absolute; right: 0; bottom: 0; left: 0; height: 1px; transform: scaleX(.22); transform-origin: left; background: var(--landing-accent); content: ""; transition: transform .3s cubic-bezier(.2,.8,.2,1); }
.landing-story-action:hover::after, .landing-story-action:focus-visible::after { transform: scaleX(1); }
.landing-story-action:focus-visible, .landing-workspace-link:focus-visible, .landing-nav a:focus-visible, .landing-theme-toggle:focus-visible { outline: 2px solid var(--landing-focus); outline-offset: 5px; }
.landing-story-action:disabled { opacity: .72; cursor: progress; }
.landing-workspace-link { color: var(--landing-muted); font-size: 14px; text-decoration: underline; text-decoration-color: var(--landing-line); text-underline-offset: 5px; }
.landing-story-track { --landing-stage-progress: 0%; position: absolute; z-index: 3; right: clamp(156px,12vw,190px); bottom: 58px; left: clamp(386px,30vw,470px); display: grid; grid-template-columns: repeat(6,minmax(0,1fr)); margin: 0; padding: 0; list-style: none; }
.landing-story-track::before, .landing-story-track::after { position: absolute; top: 7px; left: 7%; height: 1px; content: ""; }
.landing-story-track::before { right: 7%; background: var(--landing-track); }
.landing-story-track::after { width: calc(var(--landing-stage-progress) * .86); background: var(--landing-accent); transition: width .7s cubic-bezier(.2,.8,.2,1); }
.landing-story-track li { position: relative; z-index: 1; display: grid; justify-items: center; gap: 7px; color: var(--landing-faint); font-size: 10px; letter-spacing: .06em; }
.landing-story-track i { display: block; width: 15px; height: 15px; border: 1px solid var(--landing-track); border-radius: 50%; background: var(--landing-bg); transition: border-color .3s ease,background .3s ease,box-shadow .3s ease; }
.landing-story-track li.is-complete, .landing-story-track li.is-current { color: var(--landing-accent-strong); }
.landing-story-track li.is-complete i { border-color: var(--landing-accent); background: var(--landing-accent); }
.landing-story-track li.is-current i { border-color: var(--landing-accent); box-shadow: 0 0 0 4px color-mix(in srgb,var(--landing-accent) 18%,transparent); }
.landing-stage-readout { position: absolute; right: clamp(24px,4vw,64px); bottom: 58px; display: flex; align-items: baseline; gap: 12px; color: var(--landing-faint); font-size: 12px; }
.landing-stage-readout strong { min-width: 44px; color: var(--landing-accent); font-size: 15px; }
.landing-motion-hint { position: absolute; right: clamp(24px,4vw,64px); bottom: 24px; margin: 0; color: var(--landing-faint); font-size: 10px; letter-spacing: .12em; }
.landing-hero[data-landing-stage="5"] .landing-delivery-accent, .landing-hero.is-story-complete .landing-delivery-accent { animation: landing-delivery-expand 1.05s cubic-bezier(.16,.84,.28,1) both; }
.landing-hero[data-landing-stage="5"] .landing-flow-lines, .landing-hero.is-story-complete .landing-flow-lines { opacity: .72; }
@keyframes landing-flow-drift { to { stroke-dashoffset: -96; } }
@keyframes landing-map-orbit-pulse { 0% { opacity: .95; transform: scale(.72); } 68%, 100% { opacity: 0; transform: scale(2.35); } }
@keyframes landing-hub-pulse { 0% { box-shadow: 0 0 0 0 var(--landing-hub-glow); } 100% { box-shadow: 0 0 0 24px transparent; } }
@keyframes landing-delivery-expand { 0% { opacity: 0; } 48% { opacity: .52; } 100% { opacity: 0; } }

@media (max-width: 900px) {
  .landing-body { overflow: auto; }
  .landing-hero { min-height: 920px; padding-top: 112px; }
  .landing-art { inset: 25% -42% 5% -12%; opacity: .84; }
  .landing-art-base, .landing-ppt-interaction, .landing-delivery-accent { background-position: 58% center; background-size: cover; }
  .landing-copy { width: min(670px,100%); }
  .landing-copy h1 { font-size: clamp(48px,9vw,76px); }
  .landing-actions { bottom: 88px; }
  .landing-story-track { right: 24px; bottom: 25px; left: 24px; }
  .landing-stage-readout, .landing-motion-hint { display: none; }
}
@media (max-width: 600px) {
  html[data-landing-theme="light"] { --landing-bg: #faf7f3; }
  .landing-nav { height: 62px; }
  .landing-nav nav { gap: 16px; }
  .landing-nav nav a:first-child { display: none; }
  .landing-hero { min-height: 850px; padding: 102px 20px 176px; }
  .landing-art { inset: 30% 0 8%; opacity: .76; }
  .landing-art-base, .landing-ppt-interaction, .landing-delivery-accent { background-position: center; background-size: contain; }
  #landing-title { font-size: clamp(37px,9.8vw,46px); line-height: 1.13; }
  .landing-lede { font-size: 14px; }
  .landing-assurances { gap: 8px 13px; }
  .landing-assurances span + span::before { margin-right: 13px; }
  .landing-actions { right: 20px; bottom: 92px; left: 20px; align-items: flex-start; flex-direction: column; gap: 12px; }
  .landing-story-action { min-width: 0; font-size: 25px; }
  .landing-story-track { right: 14px; bottom: 24px; left: 14px; }
  .landing-story-track li { gap: 5px; font-size: 9px; letter-spacing: 0; }
}
@media (hover: none), (pointer: coarse) {
  .landing-hero::after, .landing-ppt-interaction { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .landing-art-base, .landing-ppt-interaction, .landing-delivery-accent, .landing-flow-lines path, .landing-map-orbit, .landing-stage-effects i, .landing-story-action::after { animation: none !important; transition: none !important; }
  .landing-hero::after, .landing-ppt-interaction, .landing-delivery-accent { display: none; }
  .landing-map-orbit-runner { display: none; }
}