/* Website showcase: structure and control tokens follow the approved Zhonghe AI v6. */
.ai-section{background:#102e25;color:#eef1e5;position:relative;overflow:hidden;padding:100px 0 110px}
.ai-grain{position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse at 80% 40%,#63845b33,transparent 55%),linear-gradient(125deg,transparent 40%,#aab66e06 65%,transparent 85%)}
.ai-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.12fr);align-items:center;gap:65px;position:relative;z-index:1}
.ai-story{min-width:0}.ai-story h2{font-size:clamp(40px,4.4vw,64px);line-height:1.25;font-weight:400;letter-spacing:-.035em}.ai-story .eyebrow{color:#c8d1b8}
.ai-lead{font-size:18px;line-height:1.9;color:#b7c8ad;margin-top:28px}.ai-modes{margin-top:30px;max-width:370px}
.ai-modes button{width:100%;display:grid;grid-template-columns:24px minmax(0,1fr) 18px;align-items:center;gap:16px;text-align:left;border:0;border-bottom:1px solid #d4debd24;padding:16px 10px;background:none;color:#b9cab3;border-radius:0;transition:background .3s,color .3s}
.ai-modes button>svg:first-child{width:24px;height:24px}.ai-modes button>svg:last-child{width:18px;height:18px;opacity:.5;transition:transform .3s}.ai-modes button>span{min-width:0;font-size:15px;line-height:1.5}.ai-modes small{display:block;font-size:11px;color:#b9cab3;margin-top:4px;font-weight:400}
.ai-modes button[aria-selected=true]{color:#ead39b;background:linear-gradient(90deg,#c9d99a13,transparent)}.ai-modes button[aria-selected=true]>svg:last-child{opacity:1;transform:translateX(3px)}.ai-modes button:focus-visible{outline-color:#ddc585}.ai-agriculture-note{font-size:11px;color:#b4c5aa;line-height:1.8;margin-top:22px}
.ai-stage{position:relative;min-width:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:28px 0 0;isolation:isolate}
.ai-halo{position:absolute;pointer-events:none;z-index:-1;border:1px solid #d4d9ab20;border-radius:50%;width:110%;aspect-ratio:1;transform:rotate(-20deg) scaleX(1.04)}.halo-two{width:135%;opacity:.6}
.ai-window{--ai-page:#ECEEED;--ai-ink:#111;--ai-meta:#606B63;--ai-edge:rgba(221,228,222,.9);--ai-card:#fff;--ai-user:#e2e9e3;width:min(390px,100%);min-width:0;position:relative;z-index:2;background:var(--ai-page);color:var(--ai-ink);border:1px solid #fff;border-radius:28px;box-shadow:0 30px 80px #061c2360,0 2px 3px #ffffff20 inset;padding:0;transform:rotate(1.5deg);transition:transform .6s}
.ai-window-top{height:52px;min-height:52px;margin:12px 12px 0;padding:0 8px;display:grid;grid-template-columns:44px minmax(0,1fr) 44px;align-items:center;border-radius:22px;background:rgba(247,248,247,.95);border:1px solid rgba(255,255,255,.95);box-shadow:0 3px 10px #141c1809,inset 0 1px 0 #fff}
.ai-window-top strong{font-size:17px;line-height:25px;font-weight:600;text-align:center;white-space:nowrap;letter-spacing:0}
.ai-round-control{width:44px;height:44px;display:grid;place-items:center;position:relative;flex:none}.ai-round-control svg{width:22px;height:22px;position:relative;stroke-width:1.5}
.ai-window-top .ai-round-control::before{content:"";position:absolute;inset:3px;border-radius:50%;background:#fff;border:1px solid #fff;box-shadow:0 3px 9px #17211c1a,0 0 0 1px #646e680b,inset 0 1px 0 #fff}.ai-window-top .ai-round-control svg{width:20px;height:20px}
.ai-demo{display:flex;flex-direction:column;min-width:0;animation:ai-panel-in .4s both}.ai-chat-messages{display:flex;flex-direction:column;gap:18px;min-height:410px;padding:22px 14px 24px;min-width:0}
.ai-user-message,.ai-answer{min-width:0;max-width:100%;border:1px solid var(--ai-edge);border-radius:20px;padding:14px 16px;font-size:15px;line-height:1.75;overflow-wrap:anywhere;animation:ai-message-in .4s both}
.ai-user-message{margin-left:26px;background:var(--ai-user)}.ai-answer{background:var(--ai-card);animation-delay:.08s}.ai-answer p{margin:0 0 11px}.ai-answer p:last-child{margin-bottom:0}
.ai-answer .ai-disclaimer{font-size:12px;line-height:1.65;color:var(--ai-meta);border-top:1px solid var(--ai-edge);padding-top:12px;margin:15px 0 0}
.ai-context-label{display:block;font-size:11px;font-weight:400;line-height:18px;color:var(--ai-meta);margin-bottom:8px}
.ai-sent-photo{display:block;width:108px;height:108px;object-fit:cover;object-position:center 35%;border-radius:12px;margin-bottom:10px}
.ai-source{border-top:1px solid var(--ai-edge);margin-top:12px;padding-top:10px;color:var(--ai-meta);font-size:11px;line-height:1.7}.ai-source summary{display:flex;align-items:center;gap:6px;cursor:pointer;list-style:none;min-height:30px}.ai-source summary::-webkit-details-marker{display:none}.ai-source summary svg{width:14px;height:14px}.ai-source summary span{flex:1;min-width:0}.ai-source[open] summary>svg:last-child{transform:rotate(180deg)}.ai-source>p{margin-top:8px;padding:9px;border-radius:10px;background:#f5f7f5}
.ai-composer-demo{display:grid;grid-template-columns:44px minmax(0,1fr) 44px;gap:6px;align-items:end;flex:none;padding:10px 14px 14px;border-top:1px solid var(--ai-edge);border-radius:0 0 28px 28px;background:var(--ai-page)}
#ai-demo-context .ai-composer-demo{grid-template-columns:44px minmax(0,1fr) 44px auto}.ai-composer-demo .ai-round-control{border:1px solid var(--ai-edge);border-radius:50%;background:var(--ai-card);box-shadow:0 4px 14px #14261c0e}
.ai-input-demo{min-width:0;min-height:44px;border:1px solid var(--ai-edge);border-radius:15px;background:var(--ai-card);box-shadow:0 4px 14px #14261c0e;padding:9px 10px;font-size:15px;line-height:24px;overflow-wrap:anywhere;color:var(--ai-meta)}.ai-input-demo.is-hold{text-align:center;font-weight:500;color:var(--ai-ink)}
.ai-send-demo{min-height:44px;border-radius:15px;padding:10px;font-size:13px;line-height:24px;white-space:nowrap;background:#b8862e;color:#171b18;display:grid;place-items:center}
.ai-demo-caption{position:relative;text-align:center;color:#b4c5aa;font-size:11px;line-height:1.7;margin:22px 0 0}
@keyframes ai-panel-in{from{opacity:.3;transform:translateY(5px)}to{opacity:1;transform:none}}@keyframes ai-message-in{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:none}}
@media(hover:hover) and (pointer:fine){.ai-stage:hover .ai-window{transform:rotate(0deg) translateY(-3px)}}
@media(max-width:1100px){.ai-layout{gap:35px;grid-template-columns:minmax(0,.95fr) minmax(0,1.1fr)}}
@media(max-width:900px){.ai-section{padding:75px 0}.ai-layout{grid-template-columns:minmax(0,1fr);gap:28px}.ai-story{max-width:580px;width:100%;margin:auto}.ai-story h2{font-size:46px}.ai-stage{padding-top:12px}.ai-window{transform:none}.ai-modes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));max-width:none;gap:8px;margin-top:25px}.ai-modes button{display:flex;flex-direction:column;gap:10px;justify-content:center;padding:15px 4px;text-align:center;border:1px solid #dae3be35;border-radius:14px}.ai-modes button>span{font-size:13px}.ai-modes button>svg:last-child,.ai-modes small{display:none}.ai-modes button[aria-selected=true]{background:#e3e8ca12;border-color:#e0c58587}.ai-agriculture-note{margin-top:18px}}
@media(max-width:640px){.ai-section{padding:65px 0}.ai-story h2{font-size:42px}.ai-lead{font-size:15px;margin-top:22px}.ai-window-top{margin:10px 10px 0;padding:0 5px}.ai-window-top strong{font-size:16px}.ai-chat-messages{padding:20px 12px;min-height:410px}.ai-user-message,.ai-answer{font-size:14px;padding:13px 14px}.ai-composer-demo{padding:10px 10px 12px;grid-template-columns:44px minmax(0,1fr) 44px}.ai-composer-demo .ai-round-control{width:44px;height:44px}.ai-input-demo{font-size:14px}.ai-send-demo{padding-inline:8px}#ai-demo-context .ai-composer-demo{grid-template-columns:44px minmax(0,1fr) 44px auto}}
@media(max-width:350px){.ai-story h2{font-size:37px}.ai-window-top{grid-template-columns:44px minmax(0,1fr) 44px}.ai-window-top .ai-round-control{width:44px}.ai-window-top strong{font-size:15px}.ai-chat-messages{padding-inline:10px}.ai-user-message{margin-left:18px}.ai-composer-demo{gap:5px}.ai-input-demo{padding-inline:8px}}
@media(prefers-reduced-motion:reduce){.ai-window,.ai-stage:hover .ai-window{transform:none}.ai-demo,.ai-user-message,.ai-answer{animation:none}}