:root {
  --forest-950: #082c1f;
  --forest-900: #123f2c;
  --forest-800: #1b573b;
  --forest-700: #25714a;
  --leaf: #77ad56;
  --lime: #c8e46d;
  --cream: #f4f1e7;
  --paper: #faf9f4;
  --ink: #15221b;
  --muted: #617067;
  --line: #d8ddd6;
  --white: #fff;
  --radius: 24px;
  --container: 1200px;
  --shadow: 0 24px 60px rgba(8, 44, 31, 0.14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
button { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { width: min(calc(100% - 48px), var(--container)); margin-inline: auto; }
.section { padding: 120px 0; }

.skip-link { position: fixed; z-index: 1000; top: 8px; left: 8px; transform: translateY(-140%); padding: 12px 18px; background: white; border-radius: 8px; color: var(--forest-900); }
.skip-link:focus { transform: none; }

.site-header { position: fixed; z-index: 100; inset: 0 0 auto; color: white; transition: background .25s ease, box-shadow .25s ease; }
.site-header.is-scrolled { color: var(--ink); background: rgba(250, 249, 244, .94); box-shadow: 0 1px 0 rgba(21, 34, 27, .1); backdrop-filter: blur(18px); }
.header-inner { height: 84px; display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.brand { display: inline-flex; align-items: center; gap: 12px; min-height: 48px; }
.brand-mark { display: block; width: 52px; height: 52px; border-radius: 12px; overflow: hidden; box-shadow: 0 0 0 1px rgba(255,255,255,.12); }
.brand-mark img { width: 100%; height: 100%; object-fit: contain; }
.brand-copy { display: flex; flex-direction: column; line-height: 1; }
.brand-copy strong { font-size: 18px; letter-spacing: .02em; }
.brand-copy small { margin-top: 7px; font-size: 10px; letter-spacing: .12em; opacity: .72; }
.desktop-nav { display: flex; align-items: center; gap: 34px; margin-left: auto; }
.desktop-nav a { position: relative; padding: 31px 0; font-size: 14px; font-weight: 600; }
.desktop-nav a::after { position: absolute; content: ""; height: 2px; right: 100%; bottom: 22px; left: 0; background: var(--lime); transition: right .2s ease; }
.desktop-nav a:hover::after, .desktop-nav a:focus-visible::after { right: 0; }

a:focus-visible, button:focus-visible { outline: 3px solid var(--lime); outline-offset: 3px; }
.menu-toggle, .mobile-nav { display: none; }

.hero { position: relative; min-height: 780px; height: 100svh; max-height: 980px; display: flex; align-items: center; color: white; background: var(--forest-950); overflow: hidden; }
.hero-media { position: absolute; inset: 0; background: url("./assets/cover-1.png") center 55% / cover no-repeat; transform: scale(1.02); animation: hero-drift 14s ease-out both; }
.hero-scrim { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(3, 23, 16, .92) 0%, rgba(3, 23, 16, .72) 43%, rgba(3, 23, 16, .2) 72%, rgba(3, 23, 16, .48) 100%); }
.hero::before { position: absolute; z-index: 1; content: ""; width: 520px; height: 520px; left: -240px; bottom: -300px; border: 110px solid rgba(200, 228, 109, .1); border-radius: 50%; }
.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(300px, .7fr); align-items: end; gap: 80px; padding-top: 90px; }
.hero-copy { max-width: 760px; }
.eyebrow { display: flex; align-items: center; gap: 12px; margin: 0 0 24px; font-size: 12px; font-weight: 700; letter-spacing: .2em; text-transform: uppercase; }
.eyebrow > span { width: 34px; height: 1px; background: var(--lime); }
.eyebrow.dark { color: var(--forest-700); }
.eyebrow.dark > span { background: var(--forest-700); }
.eyebrow.light { color: var(--lime); }
.hero h1 { margin: 0; max-width: 800px; font-family: "Songti SC", "STSong", serif; font-size: clamp(58px, 6.8vw, 104px); font-weight: 700; line-height: .98; letter-spacing: -.06em; }
.hero h1 em { color: var(--lime); font-style: normal; }
.hero-lead { max-width: 610px; margin: 34px 0 0; color: rgba(255,255,255,.78); font-size: 17px; line-height: 1.9; }
.hero-actions { display: flex; align-items: center; gap: 30px; margin-top: 38px; }
.hero-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 54px;
  padding: 0 28px;
  color: var(--forest-950);
  background: var(--lime);
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  box-shadow: 0 16px 36px rgba(3, 23, 16, .4);
  transition: transform .2s ease, background .2s ease;
}
.hero-download-btn svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.hero-download-btn:hover { background: #d4f2a0; transform: translateY(-2px); }
.text-link { display: inline-flex; align-items: center; gap: 16px; min-height: 48px; font-size: 14px; font-weight: 700; }
.text-link span { font-size: 20px; transition: transform .2s ease; }
.text-link:hover span { transform: translate(3px, 3px); }
.hero-panel { align-self: end; margin-bottom: 56px; padding: 32px; border: 1px solid rgba(255,255,255,.22); background: rgba(5, 32, 22, .58); backdrop-filter: blur(18px); }
.panel-kicker { margin: 0 0 34px; color: var(--lime); font-size: 10px; letter-spacing: .24em; }
.hero-panel h2 { margin: 0; font-family: "Songti SC", "STSong", serif; font-size: 27px; line-height: 1.45; }
.hero-panel ul { margin: 26px 0 0; padding: 0; list-style: none; }
.hero-panel li { display: flex; align-items: center; gap: 16px; padding: 16px 0; border-top: 1px solid rgba(255,255,255,.16); color: rgba(255,255,255,.8); font-size: 14px; }
.hero-panel li span { color: var(--lime); font-size: 11px; }
.hero-bottom { position: absolute; z-index: 2; inset: auto 0 30px; display: flex; align-items: center; gap: 14px; font-size: 9px; letter-spacing: .18em; opacity: .6; }
.hero-bottom i { display: block; width: 58px; height: 1px; background: white; }

.intro { background: var(--paper); }
.intro-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 100px; align-items: end; }
.section-heading h2, .section-top h2 { margin: 0; font-family: "Songti SC", "STSong", serif; font-size: clamp(38px, 4.4vw, 62px); line-height: 1.25; letter-spacing: -.04em; }
.intro-copy { padding-bottom: 3px; }
.intro-copy p { margin: 0; color: var(--muted); font-size: 16px; line-height: 1.9; }
.intro-copy p + p { margin-top: 16px; }

.capabilities { background: var(--cream); }
.section-top { display: flex; align-items: end; justify-content: space-between; gap: 70px; margin-bottom: 60px; }
.section-top > p { max-width: 400px; margin: 0 0 4px; color: var(--muted); line-height: 1.8; }
.capability-grid { display: grid; grid-template-columns: 1.15fr 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.capability-card { position: relative; min-height: 330px; display: flex; flex-direction: column; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.3); overflow: hidden; transition: color .25s ease, background .25s ease; }
.capability-card:hover { color: white; background: var(--forest-800); }
.card-index { align-self: flex-end; color: #8a968e; font: 12px/1 monospace; }
.card-body { margin-top: auto; }
.card-body > svg { width: 36px; height: 36px; margin-bottom: 24px; fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; color: var(--forest-700); }
.capability-card:hover .card-body > svg { color: var(--lime); }
.card-body h3 { margin: 0 0 14px; font: 700 25px/1.2 "Songti SC", "STSong", serif; }
.card-body p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.capability-card:hover .card-body p, .capability-card:hover .card-index { color: rgba(255,255,255,.72); }
.feature-card { grid-row: span 2; min-height: 660px; padding: 20px; background: var(--forest-900); color: white; }
.feature-card:hover { background: var(--forest-950); }
.feature-card .card-index { position: absolute; z-index: 2; top: 30px; right: 30px; color: white; }
.feature-visual { position: relative; height: 330px; overflow: hidden; }
.feature-visual img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.feature-card:hover img { transform: scale(1.035); }
.feature-visual span { position: absolute; right: 14px; bottom: 14px; padding: 7px 12px; color: var(--forest-950); background: var(--lime); border-radius: 999px; font-size: 11px; font-weight: 700; }
.feature-card .card-body { padding: 34px 16px 20px; }
.feature-card .card-body > svg { color: var(--lime); }
.feature-card .card-body p { color: rgba(255,255,255,.7); }

.journey { color: white; background: var(--forest-950); }
.journey-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; align-items: center; }
.journey-media { position: relative; min-height: 680px; }
.journey-media img { width: 88%; height: 620px; object-fit: cover; filter: saturate(.76); }
.live-chip { position: absolute; top: 24px; left: 24px; display: flex; align-items: center; gap: 9px; padding: 10px 14px; background: rgba(8,44,31,.75); border: 1px solid rgba(255,255,255,.3); border-radius: 999px; backdrop-filter: blur(10px); font-size: 11px; }
.live-chip i { width: 7px; height: 7px; background: #ff6b5e; border-radius: 50%; box-shadow: 0 0 0 5px rgba(255,107,94,.18); }
.journey-media blockquote { position: absolute; right: 0; bottom: 0; max-width: 330px; margin: 0; padding: 30px; color: var(--forest-950); background: var(--lime); font: 700 22px/1.6 "Songti SC", "STSong", serif; }
.journey-content h2 { margin: 0 0 48px; font: 700 clamp(38px, 4vw, 58px)/1.24 "Songti SC", "STSong", serif; letter-spacing: -.04em; }
.timeline { margin: 0; padding: 0; list-style: none; }
.timeline li { display: grid; grid-template-columns: 54px 1fr; gap: 22px; padding: 24px 0; border-top: 1px solid rgba(255,255,255,.16); }
.timeline li > span { display: grid; place-items: center; width: 44px; height: 44px; color: var(--lime); border: 1px solid rgba(200,228,109,.42); border-radius: 50%; font: 11px/1 monospace; }
.timeline h3 { margin: 0 0 8px; font-size: 17px; }
.timeline p { margin: 0; color: rgba(255,255,255,.62); font-size: 14px; line-height: 1.75; }

.solutions { background: var(--paper); }
.solution-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.solution-card { position: relative; height: 560px; overflow: hidden; background: var(--forest-800); }
.solution-card::after { position: absolute; content: ""; inset: 0; background: linear-gradient(0deg, rgba(4,28,19,.9), rgba(4,28,19,0) 65%); }
.solution-card > img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s ease; }
.solution-card:hover > img, .solution-card:hover .land-illustration { transform: scale(1.03); }
.solution-overlay { position: absolute; z-index: 2; right: 40px; bottom: 40px; left: 40px; color: white; }
.solution-overlay p { margin: 0 0 14px; color: var(--lime); font-size: 10px; letter-spacing: .2em; }
.solution-overlay h3 { margin: 0 0 14px; font: 700 40px/1.2 "Songti SC", "STSong", serif; }
.solution-overlay span { color: rgba(255,255,255,.7); font-size: 13px; }
.land-card { background: #9bbf6a; }
.land-illustration { height: 100%; transition: transform .7s ease; }
.land-illustration svg { width: 100%; height: 100%; }
.land-illustration .sun { fill: #f0de83; }
.land-illustration .far { fill: #5a8d58; }
.land-illustration .near { fill: #315f40; }
.land-illustration .rows { fill: none; stroke: #d6e9a4; stroke-width: 18; stroke-linecap: round; }
.land-illustration .leaf { fill: #c9e46d; }

.site-footer { padding: 76px 0 24px; color: rgba(255,255,255,.72); background: #061e15; }
.footer-main { display: flex; align-items: flex-start; justify-content: space-between; gap: 80px; padding-bottom: 70px; }
.footer-brand { color: white; }
.footer-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 80px; }
.footer-links div { display: flex; flex-direction: column; gap: 14px; min-width: 90px; }
.footer-links strong { margin-bottom: 8px; color: white; font-size: 13px; }
.footer-links a { width: fit-content; color: rgba(255,255,255,.6); font-size: 13px; }
.footer-links a:hover { color: var(--lime); }
.footer-bottom { display: flex; justify-content: space-between; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.12); font-size: 11px; }

.download { color: white; background: var(--forest-950); }
.download-grid { display: grid; gap: 80px; }
.download-copy h2 { margin: 0 0 26px; font: 700 clamp(38px, 4vw, 58px)/1.24 "Songti SC", "STSong", serif; letter-spacing: -.04em; }
.download-lead { max-width: 520px; margin: 0; color: rgba(255,255,255,.68); font-size: 15px; line-height: 1.9; }
.download-buttons { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 36px; }
.store-btn { display: inline-flex; align-items: center; gap: 14px; min-height: 64px; padding: 12px 26px; color: var(--forest-950); background: white; border-radius: 16px; box-shadow: 0 18px 40px rgba(3, 20, 14, .35); transition: transform .2s ease, background .2s ease; }
.store-btn:hover { background: var(--lime); transform: translateY(-2px); }
.store-btn svg { width: 28px; height: 28px; fill: currentColor; }
.store-btn > span { display: flex; flex-direction: column; line-height: 1.15; font-size: 16px; font-weight: 700; }
.store-btn small { font-size: 10px; font-weight: 600; letter-spacing: .08em; opacity: .6; }
.download-note { margin: 22px 0 0; color: rgba(255,255,255,.45); font-size: 12px; }

.download-modal { position: fixed; z-index: 200; inset: 0; display: grid; place-items: center; padding: 24px; }
.download-modal[hidden] { display: none; }
.download-modal-backdrop { position: absolute; inset: 0; background: rgba(6, 30, 21, .62); backdrop-filter: blur(8px); animation: modal-fade .25s ease both; }
.download-modal-panel { position: relative; width: min(460px, 100%); padding: 40px; background: var(--paper); border-radius: var(--radius); box-shadow: var(--shadow); animation: modal-pop .3s cubic-bezier(.2,.75,.25,1) both; }
.download-modal-close { position: absolute; top: 18px; right: 18px; width: 40px; height: 40px; display: grid; place-items: center; color: var(--muted); background: transparent; border: 0; border-radius: 50%; }
.download-modal-close:hover { color: var(--ink); background: rgba(21,34,27,.06); }
.download-modal-close svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.download-modal-panel .eyebrow { margin-bottom: 14px; }
.download-modal-panel h2 { margin: 0 0 10px; font: 700 30px/1.3 "Songti SC", "STSong", serif; }
.download-modal-lead { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.7; }
.download-modal-options { display: grid; gap: 12px; margin-top: 28px; }
.modal-store-btn { display: flex; align-items: center; gap: 14px; padding: 16px 18px; color: var(--ink); background: white; border: 1px solid var(--line); border-radius: 14px; transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease; }
.modal-store-btn:hover { border-color: var(--forest-700); transform: translateY(-1px); box-shadow: 0 12px 28px rgba(8,44,31,.1); }
.modal-store-icon { display: grid; place-items: center; width: 44px; height: 44px; color: white; background: var(--forest-800); border-radius: 12px; }
.modal-store-icon svg { width: 22px; height: 22px; fill: currentColor; }
.modal-store-btn > span:nth-child(2) { display: flex; flex-direction: column; line-height: 1.2; font-size: 15px; font-weight: 700; }
.modal-store-btn small { font-size: 10px; font-weight: 600; letter-spacing: .06em; color: var(--muted); }
.modal-store-btn > i { margin-left: auto; font-style: normal; color: var(--muted); font-size: 16px; }
@keyframes modal-fade { from { opacity: 0; } }
@keyframes modal-pop { from { opacity: 0; transform: translateY(16px) scale(.97); } }

.mobile-download-bar { display: none; position: fixed; z-index: 150; inset: auto 0 0; padding: 12px 16px calc(12px + env(safe-area-inset-bottom)); background: rgba(250, 249, 244, .96); box-shadow: 0 -10px 30px rgba(8,44,31,.12); backdrop-filter: blur(14px); border-top: 1px solid var(--line); }
.mobile-download-bar[hidden] { display: none; }
.mobile-download-bar-inner { display: flex; align-items: center; gap: 12px; max-width: 480px; margin-inline: auto; }
.mobile-download-bar-inner img { width: 44px; height: 44px; border-radius: 10px; }
.mobile-download-bar-inner > div { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.mobile-download-bar-inner strong { font-size: 14px; }
.mobile-download-bar-inner span { color: var(--muted); font-size: 11px; white-space: nowrap; }
.mobile-download-bar-inner > button[type="button"] { margin-left: auto; padding: 10px 24px; color: white; background: var(--forest-700); border: 0; border-radius: 999px; font-size: 13px; font-weight: 700; }
.mobile-download-bar-inner > button[type="button"]:hover { background: var(--forest-800); }
.mobile-download-dismiss { display: grid; place-items: center; width: 34px; height: 34px; color: var(--muted); background: transparent; border: 0; border-radius: 50%; }
.mobile-download-dismiss:hover { color: var(--ink); background: rgba(21,34,27,.06); }
.mobile-download-dismiss svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }

.toast { position: fixed; z-index: 300; left: 50%; bottom: 96px; transform: translate(-50%, 16px); padding: 12px 22px; color: white; background: rgba(8, 44, 31, .92); border-radius: 999px; box-shadow: 0 12px 30px rgba(8,44,31,.3); font-size: 13px; opacity: 0; pointer-events: none; transition: opacity .25s ease, transform .25s ease; }
.toast.is-visible { opacity: 1; transform: translate(-50%, 0); }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.75,.25,1); }
.reveal.is-visible { opacity: 1; transform: none; }
@keyframes hero-drift { from { transform: scale(1.1); } to { transform: scale(1.02); } }

@media (max-width: 980px) {
  .desktop-nav { display: none; }
  .menu-toggle { width: 48px; height: 48px; display: grid; place-content: center; gap: 5px; padding: 0; color: inherit; background: transparent; border: 0; }  .menu-toggle span { width: 24px; height: 2px; background: currentColor; transition: transform .2s ease, opacity .2s ease; }
  .menu-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-toggle.is-open span:nth-child(2) { opacity: 0; }
  .menu-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .mobile-nav { display: grid; grid-template-rows: repeat(5, auto); gap: 4px; max-height: 0; padding: 0 24px; color: var(--ink); background: var(--paper); overflow: hidden; transition: max-height .3s ease, padding .3s ease; }
  .mobile-nav.is-open { max-height: 430px; padding-block: 18px 26px; border-top: 1px solid var(--line); }
  .mobile-nav a { display: flex; align-items: center; min-height: 50px; padding: 0 8px; font-weight: 700; }
  .site-header:has(.mobile-nav.is-open) { color: var(--ink); background: var(--paper); }
  .hero { min-height: 840px; height: auto; padding: 150px 0 90px; }
  .hero-inner { grid-template-columns: 1fr; gap: 38px; padding-top: 0; }
  .hero-panel { width: min(440px, 100%); margin: 0 0 0 auto; }
  .intro-grid, .journey-grid { grid-template-columns: 1fr; gap: 56px; }
  .intro-grid { align-items: start; }
  .section-top { align-items: start; flex-direction: column; gap: 24px; }
  .capability-grid { grid-template-columns: 1fr 1fr; }
  .feature-card { grid-row: auto; grid-column: span 2; min-height: 600px; }
  .journey-media { min-height: 590px; }
  .journey-media img { height: 540px; }
  .download-grid { grid-template-columns: 1fr; gap: 56px; }
}

@media (max-width: 680px) {
  .container { width: min(calc(100% - 32px), var(--container)); }
  .section { padding: 80px 0; }
  .header-inner { height: 72px; }
  .brand-mark { width: 46px; height: 46px; border-radius: 10px; }
  .brand-copy strong { font-size: 16px; }
  .brand-copy small { font-size: 9px; }
  .hero { min-height: 780px; padding: 120px 0 64px; align-items: flex-start; }
  .hero-scrim { background: linear-gradient(180deg, rgba(3,23,16,.87) 0%, rgba(3,23,16,.62) 50%, rgba(3,23,16,.94) 100%); }
  .hero h1 { font-size: clamp(52px, 16vw, 70px); line-height: 1.03; }
  .hero-lead { margin-top: 26px; font-size: 15px; line-height: 1.8; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 10px; margin-top: 28px; }
  .hero-panel { padding: 24px; }
  .hero-panel h2 { font-size: 22px; }
  .hero-bottom { display: none; }
  .intro-grid { gap: 28px; }
  .section-heading h2, .section-top h2 { font-size: 38px; }
  .capability-grid { grid-template-columns: 1fr; }
  .feature-card { grid-column: auto; min-height: 560px; }
  .capability-card { min-height: 280px; }
  .journey-grid { gap: 50px; }
  .journey-media { min-height: 500px; }
  .journey-media img { width: 95%; height: 455px; }
  .journey-media blockquote { max-width: 280px; padding: 22px; font-size: 18px; }
  .journey-content h2 { font-size: 38px; }
  .timeline li { grid-template-columns: 44px 1fr; gap: 16px; }
  .timeline li > span { width: 38px; height: 38px; }
  .solution-grid { grid-template-columns: 1fr; }
  .solution-card { height: 470px; }
  .solution-overlay { right: 24px; bottom: 28px; left: 24px; }
  .solution-overlay h3 { font-size: 34px; }
  .footer-main { flex-direction: column; gap: 52px; padding-bottom: 50px; }
  .footer-links { width: 100%; gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 10px; }
  .download { padding-bottom: 150px; }
  .download-buttons { flex-direction: column; }
  .store-btn { justify-content: center; }
  .mobile-download-bar { display: block; }
  .download-modal-panel { padding: 32px 24px; }
  .download-modal-panel h2 { font-size: 26px; }
  .toast { bottom: 130px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}