:root{color:#171c18;background:#f7f8f4;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-synthesis:none;line-height:1.5;text-rendering:optimizeLegibility;--ink: #171c18;--muted: #5f665f;--paper: #f7f8f4;--panel: #ffffff;--line: #d8ded4;--green: #6eb733;--green-deep: #21451f;--blue: #315f7c;--clay: #a8613c}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;min-height:100vh;overflow-x:hidden}a{color:inherit;text-decoration:none}h1,h2,h3,p{margin-top:0}.page-shell{min-height:100vh;overflow:hidden}.site-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:24px;width:min(1160px,calc(100% - 40px));min-height:72px;margin:0 auto;border-bottom:1px solid rgba(23,28,24,.08);background:#f7f8f4e6;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.brand-word{color:var(--ink);font-size:17px;font-weight:800;white-space:nowrap}.nav-links{display:flex;align-items:center;gap:22px;color:#485047;font-size:14px}.nav-links a:hover,.footer-links a:hover{color:var(--green-deep)}.hero{position:relative;display:grid;grid-template-columns:minmax(0,1.08fr) minmax(280px,.58fr);gap:clamp(28px,6vw,68px);align-items:center;width:min(1160px,calc(100% - 40px));min-height:min(650px,calc(100vh - 116px));margin:0 auto;padding:54px 0 62px}.hero-backdrop{position:absolute;top:22px;right:-72px;bottom:46px;left:-72px;z-index:-1;overflow:hidden;border:1px solid rgba(23,28,24,.06);border-radius:8px;background:linear-gradient(180deg,#ffffffc7,#f7f8f4eb),linear-gradient(135deg,#eef3e6,#f7f8f4 48%,#edf3f6)}.field-grid{position:absolute;top:0;right:0;bottom:0;left:0;background-image:linear-gradient(rgba(33,69,31,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(33,69,31,.06) 1px,transparent 1px);background-size:46px 46px;-webkit-mask-image:linear-gradient(180deg,transparent 0,#000 18%,#000 80%,transparent 100%);mask-image:linear-gradient(180deg,transparent 0,#000 18%,#000 80%,transparent 100%)}.field-line{position:absolute;left:-12%;width:124%;height:86px;transform:rotate(-5deg);border-top:1px solid rgba(33,69,31,.12);border-bottom:1px solid rgba(33,69,31,.1)}.line-one{bottom:168px;background:#6eb73317}.line-two{bottom:70px;background:#315f7c12}.line-three{bottom:-30px;background:#a8613c12}.hero-copy-block{max-width:720px;min-width:0}.eyebrow{margin:0 0 14px;color:var(--green-deep);font-size:14px;font-weight:800;letter-spacing:0}h1{margin-bottom:18px;color:var(--ink);font-size:clamp(52px,8vw,88px);line-height:.98;letter-spacing:0}h2{margin-bottom:12px;color:var(--ink);font-size:clamp(28px,4vw,44px);line-height:1.1;letter-spacing:0}h3{margin-bottom:10px;color:var(--ink);font-size:20px;line-height:1.25;letter-spacing:0}.hero-copy{max-width:690px;margin-bottom:28px;color:#343b34;font-size:clamp(17px,2vw,21px);line-height:1.66;overflow-wrap:anywhere}.hero-actions{display:flex;flex-wrap:wrap;gap:12px}.primary-action,.secondary-action,.download-button{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border:1px solid var(--ink);border-radius:8px;font-size:15px;font-weight:800}.primary-action,.download-button{color:#fff;background:var(--ink)}.secondary-action{color:var(--ink);background:#ffffffb8}.signal-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}.signal-row span{display:inline-flex;align-items:center;min-height:34px;padding:0 12px;border:1px solid rgba(33,69,31,.14);border-radius:8px;color:#3f4a3d;background:#ffffffb3;font-size:13px;font-weight:700}[aria-disabled=true]{cursor:pointer}.hero-visual{display:grid;align-content:center;gap:20px;min-width:0}.mark-stage{display:grid;place-items:center;min-height:318px;border:1px solid rgba(23,28,24,.12);border-radius:8px;background:linear-gradient(180deg,#ffffffb3,#ecf2e8bd),#f1f4ec;box-shadow:0 24px 64px #171c1829}.app-icon-crop{width:clamp(172px,18vw,220px);aspect-ratio:1;overflow:hidden;border-radius:8px;background:#050605;box-shadow:inset 0 0 0 1px #ffffff14,0 18px 42px #171c1847}.app-icon-crop img{width:100%;height:100%;object-fit:cover;transform:scale(1.22)}.visual-thread{display:grid;gap:12px;min-width:0}.thread-line{max-width:92%;min-width:0;margin:0;padding:13px 14px;border-radius:8px;font-size:15px;line-height:1.72;overflow-wrap:anywhere}.thread-line.user{justify-self:end;color:#172114;background:#dcf8b4}.thread-line.assistant{justify-self:start;color:#edf2ea;background:#1d231e}.section-band,.download-section{width:min(1160px,calc(100% - 40px));margin:0 auto;padding:76px 0}.hero+.section-band{padding-top:34px}.section-heading{max-width:760px;margin-bottom:28px}.section-heading p{color:var(--muted);font-size:16px;line-height:1.78}.feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.feature-card{min-height:230px;padding:22px;border:1px solid var(--line);border-radius:8px;background:#ffffffc7}.feature-kicker{display:inline-block;margin-bottom:20px;color:var(--clay);font-size:13px;font-weight:800}.feature-card p,.download-copy,.service-note,.download-status{color:var(--muted);font-size:15px;line-height:1.76}.download-section{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:30px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.download-copy{max-width:700px;margin-bottom:12px}.service-note{max-width:760px;margin-bottom:10px}.download-status{margin-bottom:0}.site-footer{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:14px 28px;width:min(1160px,calc(100% - 40px));margin:0 auto;padding:34px 0 42px;border-top:1px solid var(--line);color:#555d55;font-size:13px}.site-footer strong,.site-footer span,.site-footer small{display:block}.site-footer strong{color:var(--ink);font-size:15px}.footer-links{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;text-align:right}@media(max-width:840px){.site-header,.hero,.section-band,.download-section,.site-footer{width:min(100% - 28px,680px)}.hero{grid-template-columns:1fr;min-height:auto;gap:24px;padding:34px 0 28px}.hero-backdrop{top:14px;right:0;bottom:38px;left:0}.field-line{left:-4%;width:108%}.mark-stage{min-height:250px}.thread-line{max-width:100%}.feature-grid,.download-section,.site-footer{grid-template-columns:1fr}.download-button{justify-self:start}.footer-links{justify-content:flex-start;text-align:left}}@media(max-width:480px){.site-header{min-height:64px}.nav-links{display:none}.hero-copy{font-size:16px}.hero-actions{flex-direction:column;align-items:stretch}.primary-action,.secondary-action,.download-button{width:100%}.feature-card{min-height:0}.visual-thread{display:none}}