/* ===== 功能介绍页面样式 v4 ===== */
:root{--primary:#6366f1;--text-main:#1e293b;--text-muted:#64748b;--border:#e2e8f0;--bg:#f8fafc}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;color:var(--text-main);background:var(--bg);line-height:1.6;overflow-x:hidden}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.hl{background:linear-gradient(135deg,#6366f1,#a855f7);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}

/* ===== 通用飞入动画 ===== */
.fly-el{opacity:0;transition:all .8s cubic-bezier(.22,.61,.36,1)}
.fly-el.visible{opacity:1}
.fly-left{transform:translateX(-80px)}.fly-left.visible{transform:translateX(0)}
.fly-right{transform:translateX(80px)}.fly-right.visible{transform:translateX(0)}
.fly-up{transform:translateY(60px)}.fly-up.visible{transform:translateY(0)}
.fly-scale{transform:scale(.8)}.fly-scale.visible{transform:scale(1)}
.fly-fade{opacity:0;transform:translateY(30px)}.fly-fade.visible{opacity:1;transform:translateY(0)}

/* ===== 第1屏 Hero - 蜂窝环绕式排版 ===== */
.feat-hero{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:80px 20px 80px;position:relative;background:#0a0a14;overflow:hidden}
.feat-hero::before{content:'';position:absolute;width:700px;height:700px;border-radius:50%;background:radial-gradient(circle,rgba(99,102,241,.06),transparent 65%);top:50%;left:50%;transform:translate(-50%,-50%);pointer-events:none;animation:centerPulse 8s ease-in-out infinite}
@keyframes centerPulse{0%,100%{transform:translate(-50%,-50%) scale(1);opacity:.6}50%{transform:translate(-50%,-50%) scale(1.2);opacity:1}}
.feat-hero::after{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.015) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.015) 1px,transparent 1px);background-size:80px 80px;mask-image:radial-gradient(ellipse at center,black 20%,transparent 60%);pointer-events:none}
.feat-hero-points{position:absolute;inset:0;pointer-events:none}
.feat-hero-points span{position:absolute;width:3px;height:3px;background:#6366f1;border-radius:50%;animation:pointFloat 6s ease-in-out infinite;opacity:.5}
.feat-hero-points span:nth-child(1){top:20%;left:15%;animation-delay:0s;animation-duration:7s}
.feat-hero-points span:nth-child(2){top:60%;left:80%;animation-delay:-2s;animation-duration:8s}
.feat-hero-points span:nth-child(3){top:30%;left:70%;animation-delay:-4s;animation-duration:6s}
.feat-hero-points span:nth-child(4){top:75%;left:25%;animation-delay:-1s;animation-duration:9s}
.feat-hero-points span:nth-child(5){top:15%;left:55%;animation-delay:-3s;animation-duration:7s}
.feat-hero-points span:nth-child(6){top:50%;left:10%;animation-delay:-5s;animation-duration:8s}
@keyframes pointFloat{0%,100%{transform:translateY(0) scale(1)}50%{transform:translateY(-30px) scale(2);opacity:.8}}
.feat-hero .hero-inner{position:relative;z-index:2;max-width:1200px;width:100%}

/* 标题区 */
.feat-hero .hero-head{text-align:center;margin-bottom:48px}
.feat-hero h1{font-size:clamp(2rem,4vw,3.6rem);font-weight:900;letter-spacing:-1px;line-height:1.1;color:#fff;margin-bottom:16px}
.feat-hero h1 .hl{background:linear-gradient(135deg,#a5b4fc,#c084fc);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.feat-hero .hero-sub{font-size:1rem;color:#94a3b8;max-width:580px;margin:0 auto 32px;line-height:1.6}

/* 标签云 - 移到底部 */
.feat-hero .hero-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:40px}
.feat-hero .hero-tags span{padding:6px 16px;border-radius:18px;font-size:.73rem;font-weight:600;cursor:pointer;transition:all .3s;border:1px solid rgba(255,255,255,.08);background:rgba(255,255,255,.04);color:#94a3b8;white-space:nowrap}
.feat-hero .hero-tags span:hover{border-color:rgba(99,102,241,.5);background:rgba(99,102,241,.15);color:#a5b4fc;transform:translateY(-2px);box-shadow:0 4px 16px rgba(99,102,241,.2)}

/* === 4列网格 === */
.feat-hive{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;max-width:1100px;margin:0 auto;
    grid-template-areas:"c1 c2 c3 c4""c5 c6 c7 c8""ai ai ai ck"}
.feat-hive-card{background:rgba(255,255,255,.025);border:1px solid rgba(255,255,255,.05);border-radius:16px;padding:20px 16px;cursor:pointer;transition:all .35s cubic-bezier(.23,1,.32,1);position:relative;overflow:hidden;display:flex;flex-direction:column;gap:8px;text-align:center}
.feat-hive-card:hover{transform:translateY(-6px);border-color:var(--hc);z-index:5;box-shadow:0 14px 40px rgba(0,0,0,.35),0 0 30px var(--hc,transparent);background:rgba(255,255,255,.06)}
.feat-hive-card:nth-child(1){grid-area:c1}.feat-hive-card:nth-child(2){grid-area:c2}.feat-hive-card:nth-child(3){grid-area:c3}.feat-hive-card:nth-child(4){grid-area:c4}
.feat-hive-card:nth-child(5){grid-area:c5}.feat-hive-card:nth-child(6){grid-area:c6}.feat-hive-card:nth-child(7){grid-area:c7}.feat-hive-card:nth-child(8){grid-area:c8}
.feat-hive-card:nth-child(9){display:none}
/* AI 占3列 */
.feat-hive-card.ai-card{grid-area:ai;display:flex;flex-direction:row;align-items:center;gap:20px;text-align:left;background:linear-gradient(145deg,rgba(99,102,241,.12),rgba(139,92,246,.05));border-color:rgba(99,102,241,.2);padding:28px 28px}
.feat-hive-card.ai-card:hover{transform:translateY(-6px);border-color:#818cf8;box-shadow:0 16px 44px rgba(99,102,241,.3),0 0 50px rgba(139,92,246,.1)}
/* 模块10 清单入口 */
.feat-hive-card.ck-card{grid-area:ck;background:linear-gradient(145deg,rgba(99,102,241,.08),rgba(139,92,246,.03));border-color:rgba(99,102,241,.15)}
.feat-hive-card.ck-card:hover{border-color:#818cf8;box-shadow:0 14px 36px rgba(99,102,241,.2);background:rgba(99,102,241,.1)}
.feat-hive-card.ck-card .hc-title{color:#a5b4fc}
.feat-hive-card.ck-card .hc-desc{color:#818cf8;font-weight:600;font-size:.78rem}
.feat-hive-card .hc-icon{width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;margin:0 auto;transition:all .35s;box-shadow:0 4px 12px rgba(0,0,0,.25)}
.feat-hive-card:hover .hc-icon{transform:scale(1.15) rotate(-6deg);box-shadow:0 8px 24px var(--hc)}
.feat-hive-card .hc-title{font-size:.85rem;font-weight:700;color:#f1f5f9;transition:color .3s}
.feat-hive-card:hover .hc-title{color:var(--hc)}
/* 描述文字 */
.feat-hive-card .hc-desc{font-size:.73rem;color:#64748b;line-height:1.45;transition:color .3s}
.feat-hive-card:hover .hc-desc{color:#94a3b8}
/* 色线装饰 */
.feat-hive-card .hc-line{width:20px;height:2px;border-radius:1px;background:var(--hc);margin:2px auto 0;transition:all .35s}
.feat-hive-card:hover .hc-line{width:36px}
/* AI 横排样式 */
.feat-hive-card.ai-card .hc-icon{width:56px;height:56px;font-size:1.5rem;margin:0;border-radius:14px;flex-shrink:0}
.feat-hive-card.ai-card .hc-body{flex:1;min-width:0}
.feat-hive-card.ai-card .hc-title{font-size:1.05rem;color:#c4b5fd}
.feat-hive-card.ai-card .hc-desc{font-size:.84rem;color:#94a3b8;margin-top:4px}
.feat-hive-card.ai-card .hc-line{width:30px;height:3px;margin:8px 0 0;background:#818cf8}
.feat-hive-card.ai-card:hover .hc-line{width:60px}

/* 涟漪 */
.hc-ripple{position:absolute;width:6px;height:6px;background:var(--hc);border-radius:50%;transform:translate(-50%,-50%) scale(0);animation:hcRipple .7s ease-out forwards;pointer-events:none;z-index:0;opacity:.25}
@keyframes hcRipple{to{transform:translate(-50%,-50%) scale(50);opacity:0}}{position:absolute;width:6px;height:6px;background:var(--hc);border-radius:50%;transform:translate(-50%,-50%) scale(0);animation:hcRipple .7s ease-out forwards;pointer-events:none;z-index:0;opacity:.25}
@keyframes hcRipple{to{transform:translate(-50%,-50%) scale(50);opacity:0}}

/* ===== 第2-10屏：详情屏 ===== */
.feat-detail{padding:70px 0;position:relative;overflow:hidden}
.feat-detail::before{content:'';position:absolute;width:400px;height:400px;border-radius:50%;background:var(--detail-color,var(--primary));opacity:.025;filter:blur(100px);top:50%;transform:translateY(-50%);pointer-events:none;transition:all 3s ease}
.feat-detail.visible::before{opacity:.05}
.feat-detail:nth-of-type(odd){background:linear-gradient(180deg,#fff 0%,#f5f5f5 100%)}
.feat-detail:nth-of-type(odd)::before{left:5%}
.feat-detail:nth-of-type(even){background:linear-gradient(180deg,#f8fafc 0%,#fff 100%)}
.feat-detail:nth-of-type(even)::before{right:5%}
.feat-detail .container{position:relative;z-index:1}
/* divider — 粗实线从无到有 */
.feat-divider{position:relative;height:40px;display:flex;align-items:center;overflow:hidden;background:transparent}
.feat-divider .dl{position:absolute;left:50%;transform:translateX(-50%);width:50%;height:3px;border-radius:2px;transform-origin:left center;transform:translateX(-50%) scaleX(0);transition:transform 1.2s cubic-bezier(.22,.61,.36,1)}
.feat-divider.from-right .dl{transform-origin:right center}
.feat-divider.visible .dl{transform:translateX(-50%) scaleX(1)}
/* 3条不同颜色 */
.feat-divider:nth-of-type(1) .dl{background:linear-gradient(90deg,#6366f1,#a855f7)}
.feat-divider:nth-of-type(2) .dl{background:linear-gradient(90deg,#06b6d4,#0ea5e9)}
.feat-divider:nth-of-type(3) .dl{background:linear-gradient(90deg,#10b981,#34d399)}
.feat-detail-layout{display:grid;gap:48px;align-items:center}
/* 奇屏：图左+文字右 */
.feat-detail:nth-of-type(odd) .feat-detail-layout{grid-template-columns:420px 1fr}
.feat-detail:nth-of-type(odd) .feat-detail-img{order:1}
.feat-detail:nth-of-type(odd) .feat-detail-body{order:2}
/* 偶屏：文字左+图右 */
.feat-detail:nth-of-type(even) .feat-detail-layout{grid-template-columns:1fr 420px}
.feat-detail:nth-of-type(even) .feat-detail-img{order:2}
.feat-detail:nth-of-type(even) .feat-detail-body{order:1}

/* 固定尺寸图片区 */
.feat-detail-img{width:420px;height:420px;border-radius:20px;overflow:hidden;position:relative;flex-shrink:0;box-shadow:0 8px 32px rgba(0,0,0,.06);transition:all .4s}
.feat-detail-img:hover{transform:translateY(-4px);box-shadow:0 16px 48px rgba(0,0,0,.1)}
.feat-detail-img.has-img img{width:100%;height:100%;object-fit:cover;border-radius:20px;transition:transform .6s}
.feat-detail-img.has-img:hover img{transform:scale(1.05)}
/* 无图时自动生成占位 */
.feat-detail-img .fd-placeholder{width:100%;height:100%;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:12px;position:relative;overflow:hidden}
.feat-detail-img .fd-placeholder .fd-orb{position:absolute;border-radius:50%;filter:blur(40px);opacity:.15}
.feat-detail-img .fd-placeholder .fd-orb:nth-child(1){width:160px;height:160px;top:-20px;right:-20px;animation:fdOrbFloat 7s ease-in-out infinite}
.feat-detail-img .fd-placeholder .fd-orb:nth-child(2){width:100px;height:100px;bottom:-15px;left:-15px;animation:fdOrbFloat 6s ease-in-out infinite reverse}
@keyframes fdOrbFloat{0%,100%{transform:translate(0,0)}50%{transform:translate(15px,-10px)}}
.feat-detail-img .fd-icon{font-size:3.2rem;z-index:1;position:relative;filter:drop-shadow(0 4px 8px rgba(0,0,0,.1))}
.feat-detail-img .fd-label{font-size:.72rem;font-weight:700;z-index:1;position:relative;color:rgba(255,255,255,.8);letter-spacing:.5px;background:rgba(0,0,0,.12);padding:3px 12px;border-radius:8px}

/* 文字内容区 */
.feat-detail-body{display:flex;flex-direction:column;gap:16px}
.feat-detail-badge{display:inline-flex;align-items:center;gap:6px;padding:5px 14px;border-radius:18px;font-size:.76rem;font-weight:600;width:fit-content;backdrop-filter:blur(4px)}
.feat-detail-body h2{font-size:clamp(1.6rem,2.5vw,2.1rem);font-weight:900;line-height:1.15;margin:0}
.feat-detail-sub{font-size:.92rem;color:#64748b;line-height:1.6;margin:0}
.feat-detail-points{list-style:none;display:flex;flex-direction:column;gap:8px}
.feat-detail-points li{display:flex;align-items:flex-start;gap:10px;font-size:.89rem;line-height:1.45;padding:9px 12px;border-radius:10px;border-left:3px solid var(--detail-color,var(--primary));background:#f8fafc;transition:all .3s}
.feat-detail-points li:hover{transform:translateX(6px);background:#eef2ff;box-shadow:0 2px 12px rgba(99,102,241,.08)}
.feat-detail-points li i{color:var(--detail-color,var(--primary));font-size:.85rem;margin-top:2px;flex-shrink:0}

.feat-detail-list{background:#fff;border-radius:16px;padding:24px;box-shadow:0 2px 20px rgba(0,0,0,.04);border:1px solid var(--border);height:fit-content;transition:all .4s}
.feat-detail-list:hover{box-shadow:0 8px 32px rgba(0,0,0,.08);transform:translateY(-2px)}
.feat-detail-list-title{font-size:.84rem;font-weight:700;color:var(--primary);margin-bottom:14px;display:flex;align-items:center;gap:7px}
.feat-detail-list-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.feat-detail-list-item{display:flex;align-items:center;gap:7px;font-size:.81rem;color:var(--text-main);padding:9px 12px;background:#f8fafc;border-radius:8px;transition:all .2s;cursor:default}
.feat-detail-list-item:hover{background:var(--detail-color,var(--primary));color:#fff;transform:translateX(4px)}
.feat-detail-list-item:hover i{color:#fff}
.feat-detail-list-item i{color:#10b981;font-size:.68rem;flex-shrink:0;transition:color .2s}

/* AI 屏 */
.feat-detail-ai{background:#0d1117 !important;padding:50px 0}
.feat-detail-ai::before{display:none}
.feat-ai-badge{background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff !important}
.feat-ai-title{color:#fff !important}
.feat-ai-sub{color:#94a3b8 !important}
.feat-ai-points li{color:#cbd5e1 !important;background:rgba(255,255,255,.03) !important}
.feat-ai-points li:hover{background:rgba(99,102,241,.1) !important;transform:translateX(6px);box-shadow:0 2px 12px rgba(99,102,241,.15)}
.feat-ai-points li i{color:#818cf8 !important}
.feat-ai-chat{background:#161b22;border-radius:20px;padding:28px;border:1px solid #30363d;height:fit-content}
.feat-ai-chat-q{display:flex;align-items:flex-start;gap:12px;margin-bottom:18px;padding:14px 16px;background:#0d1117;border-radius:14px;font-size:.88rem}
.feat-ai-chat-q i{color:#6366f1;margin-top:2px}.feat-ai-chat-q span{color:#e6edf3;line-height:1.5}
.feat-ai-chat-a{display:flex;align-items:flex-start;gap:12px;padding:14px 16px;background:linear-gradient(135deg,rgba(99,102,241,.12),rgba(139,92,246,.06));border-radius:14px;border:1px solid rgba(99,102,241,.2);font-size:.85rem}
.feat-ai-chat-a i{color:#8b5cf6;margin-top:2px}.feat-ai-chat-a span{color:#c9d1d9;line-height:1.55}
.feat-ai-chat-input{display:flex;gap:8px;margin-top:18px}
.feat-ai-chat-input input{flex:1;padding:12px 16px;border-radius:12px;border:1px solid #30363d;background:#0d1117;color:#e6edf3;font-size:.84rem;outline:none;transition:border .2s}
.feat-ai-chat-input input:focus{border-color:#6366f1}
.feat-ai-chat-input button{width:46px;height:46px;border-radius:12px;border:none;background:linear-gradient(135deg,#6366f1,#8b5cf6);color:#fff;cursor:pointer;font-size:1rem;transition:all .2s;display:flex;align-items:center;justify-content:center}
.feat-ai-chat-input button:hover{transform:scale(1.06);box-shadow:0 4px 20px rgba(99,102,241,.4)}

/* ===== 清单屏 ===== */
.feat-checklist{padding:100px 0 80px;background:linear-gradient(180deg,#fff 0%,#f8fafc 100%)}
.feat-cl-title{font-size:clamp(1.8rem,3.5vw,2.8rem);font-weight:900;text-align:center;margin-bottom:14px}
.feat-cl-sub{text-align:center;color:#64748b;font-size:.98rem;max-width:580px;margin:0 auto 50px;line-height:1.6}
.feat-cl-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px;max-width:1200px;margin:0 auto}
.feat-cl-card{background:#fff;border-radius:18px;padding:26px 24px;border:1px solid var(--border);transition:all .45s cubic-bezier(.22,.61,.36,1);opacity:0;transform:translateY(50px) scale(.94);position:relative;overflow:hidden}
.feat-cl-card.visible{opacity:1;transform:translateY(0) scale(1)}
.feat-cl-card::after{content:'';position:absolute;top:0;left:0;width:4px;height:0;background:var(--primary);transition:height .5s cubic-bezier(.22,1,.36,1)}
.feat-cl-card:hover{box-shadow:0 14px 44px rgba(99,102,241,.12);transform:translateY(-6px) !important;border-color:#c7d2fe}
.feat-cl-card:hover::after{height:100%}
.feat-cl-card-head{display:flex;align-items:center;gap:12px;margin-bottom:16px;padding-bottom:12px;border-bottom:2px solid #f1f5f9;transition:all .3s}
.feat-cl-card:hover .feat-cl-card-head{border-bottom-color:#c7d2fe}
.feat-cl-card-icon{font-size:1.3rem;width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .35s}
.feat-cl-card:hover .feat-cl-card-icon{transform:scale(1.12);box-shadow:0 4px 12px rgba(99,102,241,.2)}
.feat-cl-card-icon.i0{background:#ede9fe}.feat-cl-card-icon.i1{background:#dbeafe}.feat-cl-card-icon.i2{background:#d1fae5}.feat-cl-card-icon.i3{background:#fef3c7}.feat-cl-card-icon.i4{background:#ede9fe}.feat-cl-card-icon.i5{background:#dbeafe}.feat-cl-card-icon.i6{background:#e0e7ff}.feat-cl-card-icon.i7{background:#fce7f3}.feat-cl-card-icon.i8{background:#d1fae5}.feat-cl-card-icon.i9{background:#fef3c7}
.feat-cl-card-head h3{font-size:.98rem;font-weight:700;transition:color .3s}
.feat-cl-card:hover .feat-cl-card-head h3{color:var(--primary)}
.feat-cl-card-body{display:flex;flex-direction:column;gap:5px}
.feat-cl-item{display:flex;align-items:center;gap:7px;font-size:.8rem;color:#475569;padding:4px 0;transition:all .2s;cursor:default}
.feat-cl-item:hover{color:var(--primary);transform:translateX(4px)}
.feat-cl-item i{color:#10b981;font-size:.64rem;flex-shrink:0;transition:transform .2s}
.feat-cl-item:hover i{transform:scale(1.2)}
.feat-cl-ctag{font-size:.55rem;font-weight:600;padding:1px 7px;border-radius:10px;background:#eef2ff;color:#6366f1;flex-shrink:0;white-space:nowrap;transition:all .2s}
.feat-cl-ctag:hover{background:#6366f1;color:#fff}

footer{padding:40px 0;text-align:center;background:#1e293b;color:#94a3b8;font-size:.85rem}

/* ===== 响应式 ===== */

/* --- 平板端 (901px - 1200px) --- */
@media (max-width: 1200px) and (min-width: 901px) {
  .feat-detail-layout,
  .feat-detail:nth-of-type(odd) .feat-detail-layout,
  .feat-detail:nth-of-type(even) .feat-detail-layout { grid-template-columns: 340px 1fr; gap: 36px; }
  .feat-detail-img { width: 340px; height: 340px; }
  .feat-cl-grid { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
}

/* --- 折叠屏展开态 / 方形屏（鸿蒙双折叠、三星 Fold 等，宽高比接近 1:1） --- */
/* 展开后宽度 900-1200px 但高度也接近方形，第1屏蜂窝卡片 4 列太挤导致内容被裁切 */
@media (max-width: 1200px) and (min-aspect-ratio: 4/5) and (max-aspect-ratio: 5/4) {
  .feat-hero { min-height: auto; height: auto; overflow: visible; padding: 80px 20px 70px; }
  .feat-hero h1 { font-size: 2.2rem; }
  .feat-hero .hero-head { margin-bottom: 36px; }
  /* 蜂窝网格降为 3 列，卡片更宽更矮，避免总高度超出可视区 */
  .feat-hive {
    grid-template-columns: repeat(3, 1fr);
    grid-template-areas:
      "c1 c2 c3"
      "c4 c5 c6"
      "c7 c8 c9"
      "c10 c10 ai"
      "ai ai ai";
    gap: 12px;
  }
  .feat-hive-card:nth-child(10) { grid-area: c10; }
  .feat-hive-card { padding: 16px 14px; }
}

/* --- 小平板 / 横屏手机 (769px - 900px) --- */
@media (max-width: 900px) {
  .container { padding: 0 18px; }
  .feat-hero { padding: 60px 16px 80px; min-height: auto; }
  .feat-hive { grid-template-columns: repeat(2, 1fr); grid-template-areas: "c1 c2" "c3 c4" "c5 c6" "c7 c8" "c9 c10" "ai ai"; gap: 12px; }
  .feat-hive-card.ai-card { grid-area: auto; padding: 24px 20px; }
  .feat-detail { padding: 48px 0; }
  .feat-detail-layout,
  .feat-detail:nth-of-type(odd) .feat-detail-layout,
  .feat-detail:nth-of-type(even) .feat-detail-layout { grid-template-columns: 1fr 280px; gap: 28px; }
  .feat-detail-img { width: 280px; height: 280px; }
  .feat-detail-list-grid { grid-template-columns: 1fr; }
  .feat-cl-grid { grid-template-columns: 1fr 1fr; }
  .hero-tags { gap: 6px; }
  .hero-tags span { padding: 5px 12px; font-size: .68rem; }
}

/* --- 手机端 (≤768px)：隐藏第2-9屏图片 --- */
@media (max-width: 768px) {
  .container { padding: 0 14px; }
  .feat-hero { padding: 96px 14px 40px; min-height: auto; }
  .feat-hero .hero-head { margin-bottom: 30px; }
  .feat-hero h1 { font-size: 1.5rem; line-height: 1.4; }
  .feat-hero .hero-sub { font-size: .82rem; margin-bottom: 14px; }
  .hero-tags { gap: 6px; margin: 18px -4px 0; }
  .hero-tags span { padding: 5px 10px; font-size: .66rem; }
  /* 第1屏蜂窝改为 2 列，卡片只保留图标+标题，隐藏描述避免拥挤错乱 */
  .feat-hive {
    grid-template-columns: repeat(2, 1fr);
    grid-template-areas:
      "c1 c2"
      "c3 c4"
      "c5 c6"
      "c7 c8"
      "c9 c10"
      "ai ai";
    gap: 10px;
    max-width: 520px;
  }
  .feat-hive-card { padding: 16px 12px; border-radius: 14px; flex-direction: row; align-items: center; justify-content: flex-start; gap: 10px; text-align: left; }
  .feat-hive-card:nth-child(10) { grid-area: c10; }
  .feat-hive-card .hc-icon { width: 38px; height: 38px; font-size: 1.05rem; border-radius: 11px; margin: 0; flex-shrink: 0; }
  .feat-hive-card .hc-title { font-size: .82rem; }
  .feat-hive-card .hc-desc { display: none; }
  .feat-hive-card .hc-line { display: none; }
  .feat-hive-card.ai-card { grid-area: ai; padding: 16px 14px; flex-direction: row; text-align: left; gap: 12px; }
  .feat-hive-card.ai-card .hc-icon { width: 40px; height: 40px; }
  .feat-hive-card.ai-card .hc-title { font-size: .9rem; }
  .feat-hive-card.ai-card .hc-desc { display: block; font-size: .72rem; }
  .feat-hive-card.ck-card { flex-direction: row; text-align: left; align-items: center; gap: 10px; }
  .feat-detail-layout,
  .feat-detail:nth-of-type(odd) .feat-detail-layout,
  .feat-detail:nth-of-type(even) .feat-detail-layout { grid-template-columns: 1fr; gap: 20px; }
  /* 手机端隐藏第2-9屏图片 */
  .feat-detail-img { display: none !important; }
  .feat-detail-body h2 { font-size: 1.35rem; }
  .feat-detail-sub { font-size: .82rem; }
  .feat-detail-points li { font-size: .8rem; padding: 7px 10px; }
  .feat-detail-points li:hover { transform: none; }
  .feat-detail-list { padding: 16px; }
  .feat-detail-list-grid { grid-template-columns: 1fr; }
  .feat-cl-grid { grid-template-columns: 1fr; }
  .feat-cl-title { font-size: 1.5rem; }
  .feat-cl-sub { font-size: .82rem; margin-bottom: 32px; }
  .feat-checklist { padding: 60px 0 50px; }
}

/* --- 小手机 (≤480px) --- */
@media (max-width: 480px) {
  .feat-hero { padding: 88px 12px 32px; min-height: auto; height: auto; overflow: visible; }
  .feat-hero .hero-head { margin-bottom: 26px; }
  .feat-hero h1 { font-size: 1.3rem; }
  .feat-hero .hero-sub { font-size: .76rem; }
  .hero-tags span { padding: 4px 8px; font-size: .62rem; }
  .feat-hive { gap: 8px; }
  .feat-hive-card { padding: 13px 10px; border-radius: 12px; gap: 8px; }
  .feat-hive-card .hc-icon { width: 34px; height: 34px; font-size: .95rem; border-radius: 10px; }
  .feat-hive-card .hc-title { font-size: .76rem; }
  .feat-hive-card.ai-card { padding: 14px 12px; gap: 10px; }
  .feat-hive-card.ai-card .hc-icon { width: 36px; height: 36px; }
  .feat-hive-card.ai-card .hc-title { font-size: .84rem; }
  .feat-hive-card.ai-card .hc-desc { font-size: .68rem; }
  .feat-detail { padding: 34px 0; }
  .feat-detail-body h2 { font-size: 1.2rem; }
  .feat-detail-sub { font-size: .78rem; }
  .feat-detail-points li { font-size: .76rem; }
  .feat-cl-card { padding: 18px 14px; }
  .feat-cl-card-head h3 { font-size: .86rem; }
  .feat-cl-item { font-size: .74rem; }
  .feat-ai-chat { padding: 18px; }
}

/* --- 折叠手机 / 超窄屏 (≤360px)：确保第1屏内容完整显示，不被裁切 --- */
@media (max-width: 360px) {
  .feat-hero { padding: 80px 10px 28px; min-height: auto; height: auto; overflow: visible; }
  .feat-hero .hero-head { margin-bottom: 22px; }
  .feat-hero h1 { font-size: 1.2rem; line-height: 1.35; letter-spacing: -0.5px; }
  .feat-hero .hero-sub { font-size: .72rem; line-height: 1.5; margin-bottom: 10px; padding: 0 4px; }
  .feat-hero .hero-tags { gap: 4px; margin-top: 16px; }
  .feat-hero .hero-tags span { padding: 3px 7px; font-size: .58rem; }
  /* 蜂窝卡片保持 2 列，进一步紧凑 */
  .feat-hive {
    grid-template-columns: repeat(2, 1fr);
    grid-template-areas:
      "c1 c2" "c3 c4" "c5 c6" "c7 c8"
      "c9 c10" "ai ai";
    gap: 6px;
  }
  .feat-hive-card:nth-child(10) { grid-area: c10; }
  .feat-hive-card { padding: 11px 8px; border-radius: 11px; gap: 7px; }
  .feat-hive-card .hc-icon { width: 30px; height: 30px; font-size: .85rem; border-radius: 9px; }
  .feat-hive-card .hc-title { font-size: .7rem; line-height: 1.3; word-break: break-all; }
  .feat-hive-card.ai-card { padding: 12px 10px; gap: 9px; }
  .feat-hive-card.ai-card .hc-icon { width: 32px; height: 32px; }
  .feat-hive-card.ai-card .hc-title { font-size: .78rem; }
  .feat-hive-card.ai-card .hc-desc { font-size: .62rem; }
}