/* =========================================================
   电竞AI 频道页样式（#/ai · #/ai-pro）v5
   设计升级：
   · 全页毛玻璃质感底图（参考首页 / 研学频道玻璃语言）：
     多层蓝/青/粉径向辉光 + 浅色渐变底 + 缓慢漂浮动效；
     卡片统一半透明白玻璃 + backdrop-filter 模糊 + 内高光描边。
   · 顶级交互：卡片悬浮抬升/辉光、消息入场动画、发送按钮按压 +
     流式生成时切换为「停止」按钮（AbortController 中断）、
     输入框聚焦光环、tab/快捷词悬浮微动。
   定价/配额沿用已测算双档（入门 ¥4.9 / Pro ¥14.9）+ 体验额度，后端不变。
   令牌：复用全局 :root（--ink/--muted/--line/--blue 等），
        新增毛玻璃令牌与缓动曲线。
   ========================================================= */

:root {
  --ai-bg: #F5F7FB;
  --ai-surface: #FFFFFF;
  --ai-text-1: #18191C;
  --ai-text-2: #6B7280;
  --ai-text-3: #9CA3AF;
  --ai-text-body: #3A3F47;
  --ai-blue: #0066FF;
  --ai-pink: #FF2E78;
  --ai-gold: #FFD156;
  --ai-gold-deep: #FF9E1F;
  --ai-gold-brown: #B87A00;
  --ai-gold-ink: #2B1A00;
  --ai-indigo: #171C4D;
  --ai-indigo2: #212454;
  --ai-border: #E5E8EA;
  --ai-divider: #EDF0F6;
  --ai-soft-blue: #F0F4FF;
  --ai-cream: #FFFBF0;
  --ai-pink-bg: #FFF0F5;
  --grad-blue: linear-gradient(90deg, #0066FF, #00B8FF);
  --grad-blue-deep: linear-gradient(90deg, #0066FF, #0099FF);
  --grad-bubble: linear-gradient(90deg, #0066FF, #009EFF);
  --grad-progress: linear-gradient(90deg, #0066FF, #00D4FF);
  --grad-gold: linear-gradient(90deg, #FFD156, #FF9E1F);
  --grad-pink: linear-gradient(90deg, #FF2E78, #FF73AD);
  --grad-indigo: linear-gradient(90deg, #171C4D, #33298C);
  --grad-indigo2: linear-gradient(90deg, #212454, #362E85);
  --grad-lightblue: linear-gradient(90deg, #F0F7FF, #EBFAFF);

  /* 毛玻璃系统 */
  --ease: cubic-bezier(.22,.61,.36,1);
  --glass-bg: rgba(255,255,255,.60);
  --glass-bg-2: rgba(255,255,255,.72);
  --glass-brd: rgba(255,255,255,.65);
  --glass-shadow: 0 10px 34px rgba(23,26,28,.10), inset 0 1px 0 rgba(255,255,255,.9);
  --glass-shadow-hover: 0 18px 48px rgba(0,102,255,.20), inset 0 1px 0 rgba(255,255,255,1);
  --glass-blur: 18px;

  /* 移动端顶级体验令牌（2026-08-26 v2） */
  --ai-header-h-mobile: 56px;
  --ai-input-h-mobile: 64px;
  --ai-mobile-radius: 18px;
  --ai-touch-target: 44px;
  --ai-safe-top: env(safe-area-inset-top, 0px);
  --ai-safe-bottom: env(safe-area-inset-bottom, 0px);
  --ai-mobile-bg-glass: rgba(255, 255, 255, 0.86);
  --ai-mobile-header-bg: rgba(255, 255, 255, 0.78);
  --ai-mobile-border: rgba(15, 27, 45, 0.06);
  --ai-mobile-text-1: #0F1B2D;
  --ai-mobile-text-2: #5B6B8C;
  --ai-mobile-text-3: #9CA3AF;
}

/* ---------- 频道页容器（毛玻璃全幅底图） ---------- */
.ai-page{
  position:relative;min-height:100vh;min-height:100dvh;overflow:hidden;padding:0 0 56px;
  background:
    radial-gradient(1000px 640px at 62% 20%, rgba(173,203,253,.45), transparent 60%),
    radial-gradient(840px 560px at 6% 0%, rgba(229,239,251,.9), transparent 55%),
    radial-gradient(760px 560px at 97% 90%, rgba(138,170,201,.26), transparent 60%),
    linear-gradient(160deg,#E5EFFB 0%,#DBE9FE 45%,#D9E7FC 100%);
}
.ai-page::before,.ai-pro-page::before{
  content:"";position:absolute;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle, rgba(173,203,253,.42), transparent 70%);
  top:-150px;left:-130px;filter:blur(60px);pointer-events:none;z-index:0;
  animation:aiDrift 17s ease-in-out infinite alternate;
}
.ai-page::after,.ai-pro-page::after{
  content:"";position:absolute;width:540px;height:540px;border-radius:50%;
  background:radial-gradient(circle, rgba(138,170,201,.32), transparent 70%);
  bottom:-170px;right:-140px;filter:blur(70px);pointer-events:none;z-index:0;
  animation:aiDrift2 21s ease-in-out infinite alternate;
}
@keyframes aiDrift{from{transform:translate(0,0)}to{transform:translate(70px,46px)}}
@keyframes aiDrift2{from{transform:translate(0,0)}to{transform:translate(-60px,-36px)}}

.ai-page .ai-inner{position:relative;z-index:1;max-width:1440px;margin:0 auto;padding:0 40px}
@media(max-width:1100px){.ai-page .ai-inner{padding:0 24px}}
@media(max-width:860px){.ai-page .ai-inner{padding:0 16px}}

/* ---------- 频道头部 ---------- */
.ai-head{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:28px 40px 24px;flex-wrap:wrap}
@media(max-width:860px){.ai-head{flex-direction:column;align-items:stretch;padding:20px 16px 16px;gap:14px}}
.ai-brand-logo{display:flex;align-items:center;flex-shrink:0;transition:transform .2s var(--ease),filter .2s var(--ease)}
.ai-brand-logo:hover{transform:translateY(-2px);filter:drop-shadow(0 12px 26px rgba(0,102,255,.30))}
.ai-brand-logo img{height:64px;width:auto;display:block;filter:drop-shadow(0 8px 20px rgba(0,102,255,.22));animation:aiHeroBob 3.2s ease-in-out infinite}
@media(max-width:1100px){.ai-brand-logo img{height:56px}}
@media(max-width:860px){.ai-brand-logo img{height:48px}}

/* ---------- 配额卡（毛玻璃） ---------- */
.ai-quota-card{
  display:flex;align-items:center;gap:20px;padding:16px 22px;border-radius:16px;flex-shrink:0;
  background:var(--glass-bg);
  -webkit-backdrop-filter:blur(var(--glass-blur)) saturate(160%);backdrop-filter:blur(var(--glass-blur)) saturate(160%);
  border:1px solid var(--glass-brd);box-shadow:var(--glass-shadow);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s var(--ease);
}
.ai-quota-card:hover{transform:translateY(-3px);box-shadow:var(--glass-shadow-hover)}
@media(max-width:860px){.ai-quota-card{flex-wrap:wrap;gap:14px}}
.ai-quota-icon{width:34px;height:34px;flex:none}
.ai-quota-info{display:flex;flex-direction:column;gap:4px}
.ai-quota-label{font-size:12px;color:var(--ai-text-3)}
.ai-quota-value{font-size:22px;font-weight:700;line-height:1.1;color:var(--ai-text-1)}
.ai-quota-value em{font-style:normal;font-size:14px;font-weight:400;color:var(--ai-text-3)}
.ai-quota-progress{width:120px;height:6px;border-radius:999px;background:var(--ai-divider);overflow:hidden;flex:none}
.ai-quota-progress i{display:block;height:100%;border-radius:999px;background:var(--grad-progress);transition:width .4s var(--ease)}
.ai-quota-act{border:none;cursor:pointer;font-family:inherit;white-space:nowrap;border-radius:999px;font-size:13px;font-weight:500;padding:9px 18px;transition:all .15s}
.ai-quota-act.exchange{background:var(--ai-cream);border:1px solid #FFB800;color:var(--ai-gold-brown)}
.ai-quota-act.exchange:hover{background:#FFF3D6;transform:translateY(-1px)}
.ai-quota-act.checkin{background:var(--grad-blue-deep);color:#fff}
.ai-quota-act.checkin:hover{filter:brightness(1.05);transform:translateY(-1px)}

/* ---------- 人格 tab 栏（毛玻璃 + 悬浮微动） ---------- */
.ai-tabs{display:flex;gap:12px;padding:0 40px 8px}
@media(max-width:860px){.ai-tabs{padding:0 16px 8px;overflow-x:auto}}
.ai-tab{display:inline-flex;align-items:center;gap:8px;padding:11px 20px;border-radius:14px;font-size:15px;white-space:nowrap;cursor:pointer;transition:all .2s var(--ease);background:var(--glass-bg-2);border:1px solid var(--glass-brd);color:var(--ai-text-2);font-weight:500;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.ai-tab img{width:16px;height:16px}
.ai-tab:hover{border-color:var(--ai-blue);color:var(--ai-blue);transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,102,255,.16)}
.ai-tab.on{background:var(--grad-blue);color:#fff;font-weight:700;box-shadow:0 4px 12px rgba(0,102,255,.25);border-color:transparent}

/* ---------- 演示条幅 ---------- */
.ai-demo-tip{display:flex;align-items:center;gap:8px;background:rgba(230,250,255,.82);border:1px solid #BEEAFF;border-radius:12px;padding:10px 16px;font-size:12.5px;color:#0A5A78;margin:14px 40px 0;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
@media(max-width:860px){.ai-demo-tip{margin:12px 16px 0}}

/* ---------- 主体网格 ---------- */
.ai-shell{display:flex;gap:20px;padding:8px 40px 40px;align-items:stretch}
@media(max-width:860px){.ai-shell{flex-direction:column;padding:8px 16px 32px}}

/* ---------- 会话侧栏（毛玻璃） ---------- */
.ai-side{width:300px;flex-shrink:0;height:620px;display:flex;flex-direction:column;gap:10px;background:var(--glass-bg);border-radius:16px;padding:16px;box-shadow:var(--glass-shadow);overflow-y:auto;
  -webkit-backdrop-filter:blur(var(--glass-blur)) saturate(160%);backdrop-filter:blur(var(--glass-blur)) saturate(160%);
  border:1px solid var(--glass-brd);transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.ai-side:hover{transform:translateY(-3px);box-shadow:var(--glass-shadow-hover)}
@media(max-width:860px){.ai-side{width:100%;height:auto;max-height:360px}}
.ai-new-btn{display:flex;align-items:center;justify-content:center;gap:8px;padding:12px;border-radius:12px;background:var(--grad-blue);font-size:14px;font-weight:700;color:#fff;cursor:pointer;border:none;transition:filter .15s,transform .15s}
.ai-new-btn img{width:16px;height:16px}
.ai-new-btn:hover{filter:brightness(1.06);transform:translateY(-1px)}
.ai-new-btn:active{transform:scale(.97)}
.ai-side-head{display:flex;align-items:center;justify-content:space-between;padding:4px 4px 0}
.ai-side-head span{font-size:12px;font-weight:500;color:var(--ai-text-3)}
.ai-conv-list{display:flex;flex-direction:column;gap:2px}
.ai-conv-empty{padding:24px 14px;text-align:center;font-size:12px;color:var(--ai-text-3)}
.ai-conv-item{display:flex;align-items:center;gap:10px;padding:11px 12px;border-radius:12px;cursor:pointer;transition:background .15s,transform .15s;position:relative}
.ai-conv-item:hover{background:rgba(255,255,255,.7);transform:translateX(2px)}
.ai-conv-item.on{background:rgba(240,244,255,.85)}
.ai-conv-item .dot{width:8px;height:8px;border-radius:999px;flex-shrink:0;background:#C7CDD9}
.ai-conv-item.on .dot{background:var(--ai-blue)}
.ai-conv-item .t{font-size:13px;font-weight:500;color:var(--ai-text-1);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:1;min-width:0}
.ai-conv-item.on .t{color:var(--ai-blue)}
.ai-conv-item .tm{font-size:11px;color:var(--ai-text-3);flex-shrink:0}
.ai-conv-del{border:none;background:none;color:var(--ai-text-3);cursor:pointer;font-size:12px;padding:2px 5px;border-radius:5px;display:none}
.ai-conv-item:hover .ai-conv-del{display:inline}
.ai-conv-del:hover{color:var(--ai-pink);background:var(--ai-pink-bg)}

/* Pro 会员入口卡（靛蓝渐变，悬浮辉光） */
.ai-pro-card{margin-top:auto;display:flex;flex-direction:column;gap:9px;padding:14px 16px;border-radius:14px;background:var(--grad-indigo);transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.ai-pro-card:hover{transform:translateY(-3px);box-shadow:0 18px 42px rgba(23,26,77,.38)}
.ai-pro-badge{padding:3px 8px;border-radius:999px;background:var(--grad-gold);font-size:10px;font-weight:700;color:var(--ai-gold-ink);letter-spacing:.5px;align-self:flex-start}
.ai-pro-sub{font-size:11px;color:#C7BFFF}
.ai-pro-card h4{font-size:15px;font-weight:700;color:#fff;margin:2px 0}
.ai-pro-card p{font-size:11.5px;color:#A9B4FF;margin-bottom:4px}
.ai-pro-btn{display:inline-flex;align-items:center;gap:6px;align-self:flex-start;padding:8px 14px;border-radius:999px;background:var(--grad-gold);font-size:12px;font-weight:700;color:var(--ai-gold-ink);cursor:pointer;border:none;transition:filter .15s,transform .15s}
.ai-pro-btn img{width:12px;height:12px}
.ai-pro-btn:hover{filter:brightness(1.05);transform:translateY(-1px)}
.ai-pro-btn:active{transform:scale(.96)}

/* ---------- 对话区（毛玻璃） ---------- */
.ai-main{position:relative;flex:1;min-width:0;height:620px;display:flex;flex-direction:column;background:var(--glass-bg);border-radius:16px;box-shadow:var(--glass-shadow);overflow:hidden;
  -webkit-backdrop-filter:blur(var(--glass-blur)) saturate(160%);backdrop-filter:blur(var(--glass-blur)) saturate(160%);
  border:1px solid var(--glass-brd);transition:box-shadow .25s var(--ease),transform .25s var(--ease)}
@media(max-width:860px){.ai-main{height:560px}}

/* ---------- 对话顶栏（chat-top · 场景状态条） ---------- */
.ai-chat-top{display:flex;align-items:center;gap:10px;padding:12px 20px 11px;border-bottom:1px solid var(--ai-border);background:rgba(255,255,255,.62);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.ai-side-toggle{display:none;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:rgba(255,255,255,.8);border:1px solid var(--glass-brd);cursor:pointer;flex-shrink:0;transition:all .15s}
.ai-side-toggle:hover{border-color:var(--ai-blue);background:var(--ai-soft-blue)}
.ai-side-toggle img{width:16px;height:16px}
.ai-status-dot{width:8px;height:8px;border-radius:50%;background:#00C48C;box-shadow:0 0 6px rgba(0,196,140,.6);flex-shrink:0}
.ai-scene-label{flex:1;font-size:12.5px;font-weight:600;color:var(--ai-text-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ai-scene-label b{color:var(--ai-blue);font-weight:700}
.ai-clear-btn{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--ai-border);border-radius:999px;padding:6px 13px;font-size:12px;color:var(--ai-text-2);cursor:pointer;flex-shrink:0;transition:all .15s}
.ai-clear-btn img{width:13px;height:13px}
.ai-clear-btn:hover{border-color:var(--ai-pink);color:var(--ai-pink);background:var(--ai-pink-bg)}

/* ---------- 模型选择弹层 ---------- */
.ai-model-mask{position:fixed;inset:0;background:rgba(15,27,45,.30);z-index:60;display:none;align-items:center;justify-content:center;padding:20px;backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px)}
.ai-model-mask.open{display:flex;animation:aiFadeIn .2s var(--ease)}
@keyframes aiFadeIn{from{opacity:0}to{opacity:1}}
.ai-model-panel{width:420px;max-width:100%;max-height:82vh;background:rgba(255,255,255,.94);border:1px solid var(--glass-brd);border-radius:20px;box-shadow:var(--glass-shadow),0 20px 60px rgba(23,26,28,.20);padding:20px 20px 16px;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);overflow-y:auto;animation:aiModalIn .28s var(--ease)}
@keyframes aiModalIn{from{opacity:0;transform:translateY(16px) scale(.97)}to{opacity:1;transform:none}}
.ai-model-panel::-webkit-scrollbar{width:6px}
.ai-model-panel::-webkit-scrollbar-thumb{background:#C7CBD3;border-radius:3px}
.ai-mp-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:2px}
.ai-mp-title{font-size:16px;font-weight:700;color:var(--ai-text-1)}
.ai-mp-close{width:30px;height:30px;border-radius:9px;background:var(--ai-soft-blue);display:flex;align-items:center;justify-content:center;cursor:pointer;border:none;transition:all .15s}
.ai-mp-close img{width:12px;height:12px}
.ai-mp-close:hover{background:var(--ai-divider);transform:rotate(90deg)}
.ai-mp-sub{font-size:12px;color:var(--ai-text-2);margin:6px 0 14px}
.ai-mp-list{display:flex;flex-direction:column;gap:10px}
.ai-model-item{display:flex;align-items:center;gap:12px;padding:13px 14px;border-radius:14px;cursor:pointer;transition:all .18s var(--ease)}
.ai-model-item:not(.selected){background:#fff;border:1px solid var(--ai-border)}
.ai-model-item.selected{background:var(--ai-soft-blue);border:1px solid #C7D9FF}
.ai-model-item:hover:not(.locked){border-color:var(--ai-blue);box-shadow:0 6px 16px rgba(0,102,255,.10)}
.ai-mm-icon{width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;flex-shrink:0;color:#fff}
.ai-mm-icon img{width:18px;height:18px}
.ai-mm-icon{font-size:20px;font-weight:700}
.ai-mm-info{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}
.ai-mm-info b{font-size:14px;font-weight:600;color:var(--ai-text-1);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.ai-mm-info i{font-style:normal;font-size:11px;color:var(--ai-text-3)}
.ai-mm-mark{width:20px;height:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.ai-mm-mark.check{background:var(--grad-blue);color:#fff}
.ai-mm-mark.check img{width:11px;height:11px}
.ai-mm-mark.lock{background:#FFF8EB;color:#B8780B}
.ai-mm-mark.lock img{width:12px;height:12px}
.ai-mp-divider{height:1px;background:var(--ai-divider);margin:14px 0 10px}
.ai-mp-foot{display:flex;align-items:center;gap:8px;font-size:11px;color:var(--ai-text-3)}
.ai-mp-foot img{width:12px;height:12px;opacity:.6}
.ai-msgs{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:22px;padding:24px 28px 16px;background:rgba(241,245,251,.35);scroll-behavior:smooth}
.ai-msg{display:flex;gap:12px;max-width:92%;animation:aiMsgIn .38s var(--ease) both}
@keyframes aiMsgIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.ai-msg.user{align-self:flex-end;flex-direction:row-reverse}
.ai-avatar{width:40px;height:40px;border-radius:12px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:17px;overflow:hidden}
.ai-msg.ai .ai-avatar{background:var(--grad-blue);box-shadow:0 4px 10px rgba(0,102,255,.2)}
.ai-msg.ai .ai-avatar img{width:40px;height:40px;display:block}
.ai-msg.user .ai-avatar{background:var(--ai-soft-blue);color:var(--ai-text-3)}
/* 用户消息编辑（hover ✎） */
.ai-msg.user{position:relative}
.ai-edit-btn{position:absolute;left:-34px;top:6px;width:26px;height:26px;border-radius:8px;border:1px solid var(--glass-brd);background:rgba(255,255,255,.85);color:var(--ai-blue);font-size:13px;cursor:pointer;display:none;align-items:center;justify-content:center;box-shadow:0 2px 8px rgba(23,26,28,.08);transition:all .15s}
.ai-msg.user:hover .ai-edit-btn{display:flex}
.ai-edit-btn:hover{background:var(--ai-soft-blue);transform:translateY(-1px)}
.ai-bubble.editing{display:flex;flex-direction:column;gap:8px;min-width:280px;max-width:100%}
.ai-edit-ta{width:100%;border:1.5px solid var(--ai-blue);border-radius:10px;padding:8px 10px;font-size:14px;font-family:inherit;resize:vertical;outline:none;color:var(--ai-text-1);background:#fff;box-shadow:0 0 0 3px rgba(0,102,255,.12)}
.ai-edit-acts{display:flex;gap:8px}
.ai-edit-save{border:none;border-radius:8px;background:var(--grad-blue);color:#fff;font-size:12px;font-weight:600;padding:6px 14px;cursor:pointer}
.ai-edit-cancel{border:1px solid var(--ai-border);border-radius:8px;background:#fff;color:var(--ai-text-2);font-size:12px;padding:6px 14px;cursor:pointer}
.ai-edit-save:hover{filter:brightness(1.05)}
.ai-bubble-wrap{flex:1;min-width:0;display:flex;flex-direction:column;gap:12px}
.ai-bubble{border-radius:16px;padding:13px 18px;font-size:14px;line-height:1.7;white-space:pre-wrap;word-break:break-word}
.ai-msg.user .ai-bubble{background:var(--grad-bubble);color:#fff;border-top-right-radius:5px;max-width:520px}
.ai-msg.ai .ai-bubble{border:1px solid rgba(255,255,255,.7);border-radius:14px;padding:20px;background:rgba(255,255,255,.95);color:var(--ai-text-body);border-top-left-radius:5px;box-shadow:0 6px 18px rgba(23,26,28,.05)}

/* AI 回复卡：标签行 + 正文 + 反馈 */
.ai-reply-tag-row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.ai-tag{padding:3px 8px;border-radius:999px;background:var(--ai-pink-bg);font-size:11px;font-weight:700;color:var(--ai-pink)}
.ai-tag.persona{background:var(--ai-pink-bg);color:var(--ai-pink)}
.ai-tag.model{background:#EDF5FF;color:var(--ai-blue)}
.ai-note{font-size:11px;color:var(--ai-text-3)}
/* Markdown 渲染内容排版 */
.ai-md{line-height:1.75}
.ai-md> :first-child{margin-top:0}
.ai-md> :last-child{margin-bottom:0}
.ai-md h1,.ai-md h2,.ai-md h3,.ai-md h4{font-weight:700;color:var(--ai-text-1);margin:14px 0 8px;line-height:1.35}
.ai-md h1{font-size:20px}.ai-md h2{font-size:17px}.ai-md h3{font-size:15px}.ai-md h4{font-size:14px}
.ai-md p{margin:6px 0}
.ai-md ul,.ai-md ol{margin:6px 0;padding-left:22px}
.ai-md li{margin:3px 0}
.ai-md strong{font-weight:700;color:var(--ai-text-1)}
.ai-md blockquote{margin:8px 0;padding:4px 14px;border-left:3px solid var(--ai-blue);background:rgba(0,102,255,.05);border-radius:0 8px 8px 0;color:var(--ai-text-2)}
.ai-md a{color:var(--ai-blue);text-decoration:underline}
.ai-md code{background:#EFF3FA;border-radius:5px;padding:1px 6px;font-family:Consolas,Menlo,monospace;font-size:12.5px;color:#C7254E}
.ai-md pre{background:#F6F8FA;border:1px solid #E4E9F2;border-radius:10px;padding:12px 14px;overflow-x:auto;margin:10px 0}
.ai-md pre code{background:none;padding:0;color:inherit;font-size:12.5px;display:block}
.ai-md table{border-collapse:collapse;margin:10px 0;width:100%;font-size:13px}
.ai-md th,.ai-md td{border:1px solid #DCE3EE;padding:6px 12px;text-align:left}
.ai-md th{background:#F0F4FF;font-weight:700;color:var(--ai-text-1)}
.ai-md tr:nth-child(2n) td{background:#FAFCFF}
.ai-md hr{border:none;border-top:1px solid var(--ai-divider);margin:14px 0}
.ai-md .ai-fx{display:inline-block;vertical-align:middle}
.ai-md .ai-fx[data-b="1"]{display:block;text-align:center;margin:10px 0}
.ai-reply-body{display:flex;flex-direction:column;gap:10px;font-size:14px;line-height:1.7;color:var(--ai-text-body)}
.ai-feedback-row{display:flex;gap:8px;padding-top:2px;flex-wrap:wrap}
.ai-fb-btn{display:inline-flex;align-items:center;gap:6px;padding:6px 12px 6px 10px;border-radius:999px;background:rgba(255,255,255,.7);font-size:12px;font-weight:500;color:var(--ai-text-2);cursor:pointer;border:1px solid rgba(255,255,255,.6);transition:background .15s,transform .12s}
.ai-fb-btn img{width:14px;height:14px}
.ai-fb-btn:hover{background:var(--ai-divider);transform:translateY(-1px)}
.ai-fb-btn:active{transform:scale(.95)}
.ai-fb-btn.on-up{background:#EAFAE5;color:#1A9B3B;border-color:#CDEBC2}
.ai-fb-btn.on-down{background:var(--ai-pink-bg);color:var(--ai-pink);border-color:#F6CFDF}

.ai-msg-meta{display:flex;align-items:center;gap:3px;font-size:11px;color:var(--ai-text-3);flex-wrap:wrap;padding-left:4px}
.ai-msg-meta .fb{border:none;background:none;cursor:pointer;font-size:13px;color:var(--ai-text-3);padding:3px 8px;border-radius:7px;line-height:1;transition:all .15s}
.ai-msg-meta .fb:hover{background:var(--ai-divider);color:var(--ai-text-2)}
.ai-msg-meta .fb.on-up{color:#1A9B3B;background:#EAFAE5}
.ai-msg-meta .fb.on-down{color:var(--ai-pink);background:var(--ai-pink-bg)}

/* 欢迎空态 */
.ai-welcome{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:50px 20px;text-align:center;animation:aiMsgIn .4s var(--ease) both}
.ai-hero-avatar{width:48px;height:48px;border-radius:50%;margin-bottom:12px;padding:3px;background:linear-gradient(135deg,var(--ai-blue),var(--ai-cyan));box-shadow:0 5px 14px rgba(0,102,255,.30),0 0 0 3px rgba(0,212,255,.12);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.ai-hero-avatar img{width:100%;height:100%;border-radius:50%;object-fit:cover;background:#fff;display:block}
.ai-welcome .big{font-size:48px;margin-bottom:14px;background:var(--grad-blue);-webkit-background-clip:text;background-clip:text;color:transparent}
.ai-welcome h3{font-size:19px;color:var(--ai-text-1);margin-bottom:7px;font-weight:700}
.ai-welcome p{font-size:13px;color:var(--ai-text-2);margin-bottom:24px}
.ai-chips{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;max-width:640px}
.ai-chip{border:1px solid var(--glass-brd);background:rgba(255,255,255,.55);border-radius:999px;padding:9px 17px;font-size:13px;color:var(--ai-text-body);cursor:pointer;transition:all .2s var(--ease);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.ai-chip:hover{border-color:var(--ai-blue);color:var(--ai-blue);background:var(--ai-soft-blue);transform:translateY(-2px);box-shadow:0 8px 18px rgba(0,102,255,.14)}
.ai-chip:active{transform:scale(.96)}

/* 流式光标 */
.ai-caret{display:inline-block;width:2px;height:15px;background:var(--ai-blue);vertical-align:-2px;margin-left:2px;animation:aiBlink .8s infinite}
@keyframes aiBlink{0%,100%{opacity:1}50%{opacity:0}}
.ai-bubble.err{background:#FEECEC;border-color:#F7C1C1;color:#C53030}

/* ---------- 输入区（强化为主视觉 · 毛玻璃控件） ---------- */
.ai-input-zone{display:flex;flex-direction:column;gap:12px;padding:16px 20px 18px;border-top:1px solid var(--ai-divider);background:rgba(255,255,255,.62);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 -10px 30px rgba(23,26,28,.05)}
.ai-quick-row{display:flex;gap:8px;flex-wrap:wrap}
/* 图片预览（多模态） */
.ai-img-preview{display:none;flex-wrap:wrap;gap:10px}
.ai-img-preview.show{display:flex}
.ai-img-thumb{position:relative;width:64px;height:64px;border-radius:10px;overflow:hidden;border:1.5px solid var(--ai-blue);box-shadow:0 3px 10px rgba(0,102,255,.18)}
.ai-img-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.ai-img-del{position:absolute;top:-6px;right:-6px;width:20px;height:20px;border-radius:50%;background:#FF4D6A;color:#fff;border:none;font-size:11px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 6px rgba(255,77,106,.4)}
.ai-quick-chip{padding:6px 13px;border-radius:999px;background:rgba(255,255,255,.5);border:1px solid var(--glass-brd);font-size:12px;color:var(--ai-text-2);cursor:pointer;transition:all .2s var(--ease);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.ai-quick-chip:hover{border-color:var(--ai-blue);color:var(--ai-blue);background:var(--ai-soft-blue);transform:translateY(-2px)}
.ai-quick-chip:active{transform:scale(.96)}
.ai-input-row{display:flex;align-items:center;gap:10px}
.ai-upload{width:46px;height:46px;border-radius:13px;background:rgba(255,255,255,.55);border:1px solid var(--glass-brd);display:flex;align-items:center;justify-content:center;flex-shrink:0;cursor:pointer;transition:all .15s;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.ai-upload:hover{border-color:var(--ai-blue);background:var(--ai-soft-blue);transform:translateY(-1px)}
.ai-upload img{width:20px;height:20px}
/* 主输入条：实心白底 + 抬升 + 聚焦光环，确保一眼可见 */
.ai-input{flex:1;min-width:0;border-radius:15px;background:#FFFFFF;border:1.5px solid #DCE3EE;display:flex;align-items:flex-end;padding:11px 16px;transition:border-color .18s,box-shadow .18s;box-shadow:0 2px 10px rgba(23,26,28,.06)}
.ai-input:focus-within{border-color:var(--ai-blue);box-shadow:0 0 0 4px rgba(0,102,255,.16),0 4px 16px rgba(0,102,255,.12)}
.ai-input input,.ai-input textarea{flex:1;border:none;background:none;outline:none;font-size:14px;line-height:1.6;color:var(--ai-text-1);font-family:inherit;resize:none;max-height:140px;padding:0;display:block}
.ai-input input::placeholder,.ai-input textarea::placeholder{color:var(--ai-text-3)}
.ai-model-select{display:inline-flex;align-items:center;gap:8px;height:46px;padding:0 13px;border-radius:12px;background:rgba(255,255,255,.85);border:1px solid #D6E3FC;flex-shrink:0;font-size:12px;font-weight:600;color:var(--ai-text-2);cursor:pointer;transition:all .15s;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.ai-model-select:hover{border-color:var(--ai-blue);color:var(--ai-blue);transform:translateY(-1px);box-shadow:0 6px 14px rgba(0,102,255,.14)}
.ai-model-select img{width:14px;height:14px}
.ai-ms-main{display:flex;flex-direction:column;gap:1px;align-items:flex-start}
.ai-ms-main b{font-size:13px;font-weight:600;color:var(--ai-text-1);line-height:1.15}
.ai-ms-main i{font-style:normal;font-size:10px;color:var(--ai-text-3);line-height:1.1}
.ai-ms-arrow{width:12px!important;height:12px!important;color:#7A90C0}
/* 发送：更大的亮蓝圆角按钮 + 悬浮抬升/按压 + 投影，作为主行动点 */
.ai-send{width:52px;height:52px;border-radius:15px;flex-shrink:0;display:flex;align-items:center;justify-content:center;background:var(--grad-blue);border:none;cursor:pointer;transition:filter .15s,transform .12s,box-shadow .15s;color:#fff;box-shadow:0 6px 18px rgba(0,102,255,.35)}
.ai-send img{width:26px;height:26px}
.ai-send:hover{filter:brightness(1.05);transform:translateY(-1px);box-shadow:0 10px 24px rgba(0,102,255,.45)}
.ai-send:active{transform:scale(.92)}
.ai-send.busy{animation:aiPulse 1.1s ease-in-out infinite}
@keyframes aiPulse{0%,100%{box-shadow:0 0 0 0 rgba(0,102,255,.5)}50%{box-shadow:0 0 0 10px rgba(0,102,255,0)}}
.ai-stop-ico{width:16px;height:16px;border-radius:4px;background:#fff;display:block;box-shadow:0 0 0 2px rgba(255,255,255,.35)}
.ai-input-note{font-size:11px;color:var(--ai-text-3);text-align:center;line-height:1.5}

/* 额度用尽卡片（毛玻璃金调） */
.ai-quota-full{margin:16px 28px;background:linear-gradient(120deg,rgba(255,248,230,.88),rgba(255,239,194,.88));border:1px solid #FFD977;border-radius:14px;padding:18px;text-align:center;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.ai-quota-full .h{font-size:14.5px;font-weight:700;color:#7A5B00;margin-bottom:6px}
.ai-quota-full .d{font-size:12px;color:#8A6D1A;margin-bottom:13px;line-height:1.6}
.ai-quota-full .acts{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.ai-quota-full .acts .btn-pill{border:none;border-radius:999px;padding:8px 20px;font-size:13px;font-weight:600;cursor:pointer;transition:transform .12s}
.ai-quota-full .acts .btn-pill:active{transform:scale(.96)}
.ai-quota-full .acts .go-pro{background:var(--grad-gold);color:var(--ai-gold-ink)}
.ai-quota-full .acts .back-chat{background:#fff;border:1px solid #E5B93F;color:#8A6D1A}

/* 未登录态 */
.ai-login-hint{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:72px 20px;text-align:center}
.ai-login-hint .big{font-size:48px;margin-bottom:14px;background:var(--grad-blue);-webkit-background-clip:text;background-clip:text;color:transparent}
.ai-title-hero{height:88px;width:auto;flex-shrink:0;display:block;filter:drop-shadow(0 10px 24px rgba(0,102,255,.35));animation:aiHeroBob 3.2s ease-in-out infinite}
@keyframes aiHeroBob{0%,100%{transform:translateY(0)}50%{transform:translateY(-5px)}}
.ai-login-hint h3{font-size:18px;color:var(--ai-text-1);margin-bottom:8px;font-weight:700}
.ai-login-hint p{font-size:13px;color:var(--ai-text-2);margin-bottom:22px;max-width:420px;line-height:1.7}

/* ===========================================================
   Pro 开通页（#/ai-pro）v5 · 毛玻璃底图 + 金边玻璃价格卡
   定价沿用双档：入门 ¥4.9（200 次）/ Pro ¥14.9（600 次 + 50 V4-Pro）
   ========================================================= */
.ai-pro-page{position:relative;overflow:hidden;padding:0 40px 60px;min-height:100vh;min-height:100dvh;
  background:
    radial-gradient(1000px 640px at 62% 20%, rgba(173,203,253,.45), transparent 60%),
    radial-gradient(840px 560px at 6% 0%, rgba(229,239,251,.9), transparent 55%),
    radial-gradient(760px 560px at 97% 90%, rgba(138,170,201,.26), transparent 60%),
    linear-gradient(160deg,#E5EFFB 0%,#DBE9FE 45%,#D9E7FC 100%)}
.ai-pro-page>*{position:relative;z-index:1;max-width:1360px;margin-left:auto;margin-right:auto}
@media(max-width:860px){.ai-pro-page{padding:0 16px 48px}}

/* Pro 页导航 */
.ai-pro-nav{display:flex;align-items:center;justify-content:space-between;padding:18px 40px;position:relative}
@media(max-width:860px){.ai-pro-nav{padding:16px}}
.ai-pro-back{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:500;color:var(--ai-blue);cursor:pointer;text-decoration:none;transition:transform .15s}
.ai-pro-back:hover{transform:translateX(-2px)}
.ai-pro-back img{width:16px;height:16px}
.ai-pro-nav-title{position:absolute;left:50%;transform:translateX(-50%);font-size:15px;font-weight:600;color:var(--ai-text-1)}
.ai-pro-member{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border-radius:999px;background:var(--ai-soft-blue);font-size:13px;font-weight:500;color:var(--ai-blue);cursor:pointer;transition:transform .15s}
.ai-pro-member:hover{transform:translateY(-1px)}
.ai-pro-member img{width:14px;height:14px}

/* 英雄区 */
.ai-pro-hero{display:flex;gap:44px;padding:36px 40px 24px;align-items:center;justify-content:space-between}
@media(max-width:1100px){.ai-pro-hero{flex-direction:column;align-items:stretch;padding:24px 16px}}
.ai-pro-hero-copy{width:660px;flex-shrink:0;display:flex;flex-direction:column;gap:16px}
@media(max-width:1100px){.ai-pro-hero-copy{width:100%}}
.ai-pro-hero-badge{display:inline-flex;align-items:center;gap:8px;align-self:flex-start;padding:5px 12px;border-radius:999px;background:var(--grad-gold);font-size:12px;font-weight:700;color:var(--ai-gold-ink)}
.ai-pro-hero-copy h1{font-size:36px;font-weight:700;line-height:1.2;color:var(--ai-text-1)}
.ai-pro-hero-sub{font-size:14px;line-height:1.7;color:var(--ai-text-2);max-width:560px}
.ai-pro-benefits{display:flex;flex-direction:column;gap:12px;padding-top:4px}
.ai-pro-benefit{display:flex;align-items:flex-start;gap:10px;font-size:14px;font-weight:500;color:var(--ai-text-body);line-height:1.55}
.ai-pro-benefit img{width:20px;height:20px;flex-shrink:0;margin-top:1px}
/* 左侧介绍区「底卡」：三张毛玻璃小卡补饱满 */
.ai-pro-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:4px}
.ai-pro-card-item{display:flex;gap:10px;padding:12px;border-radius:12px;background:rgba(255,255,255,.6);border:1px solid var(--glass-brd);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);box-shadow:0 2px 8px rgba(23,26,28,.04);transition:transform .2s var(--ease),box-shadow .2s var(--ease)}
.ai-pro-card-item:hover{transform:translateY(-2px);box-shadow:var(--glass-shadow-hover)}
.ai-pro-card-item .pc-ico{font-size:20px;line-height:1;flex-shrink:0;margin-top:2px}
.ai-pro-card-item .pc-body{display:flex;flex-direction:column;gap:3px;min-width:0}
.ai-pro-card-item .pc-body b{font-size:12.5px;font-weight:700;color:var(--ai-text-1)}
.ai-pro-card-item .pc-body span{font-size:11px;line-height:1.5;color:var(--ai-text-2)}
@media(max-width:760px){.ai-pro-cards{grid-template-columns:1fr}}

/* 价格卡（金边 + 光晕 + 玻璃，参考稿） */
.ai-price-card{width:384px;flex-shrink:0;display:flex;flex-direction:column;gap:16px;padding:26px;background:rgba(255,255,255,.78);border:1px solid var(--ai-gold);border-radius:20px;box-shadow:0 14px 40px rgba(51,41,140,.16), inset 0 0 8px rgba(255,209,86,.22);
  -webkit-backdrop-filter:blur(20px) saturate(160%);backdrop-filter:blur(20px) saturate(160%);transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.ai-price-card:hover{transform:translateY(-4px);box-shadow:0 22px 54px rgba(51,41,140,.24), inset 0 0 10px rgba(255,209,86,.3)}
@media(max-width:1100px){.ai-price-card{width:100%}}
.ai-plan-toggle{display:flex;gap:8px}
.ai-plan{flex:1;display:flex;align-items:center;justify-content:center;padding:9px;border-radius:10px;font-size:13px;font-weight:700;cursor:pointer;border:1px solid var(--ai-border);background:#fff;color:var(--ai-text-1);transition:all .15s}
.ai-plan.on{background:var(--grad-gold);color:var(--ai-gold-ink);border-color:transparent}
.ai-plan:hover:not(.on){border-color:var(--ai-blue);color:var(--ai-blue)}
.ai-price-row{display:flex;align-items:baseline;gap:8px}
.ai-price-num{font-size:40px;font-weight:700;line-height:1;color:var(--ai-text-1)}
.ai-price-unit{font-size:14px;color:var(--ai-text-3)}
.ai-price-note{margin-left:auto;font-size:12px;font-weight:500;color:var(--ai-gold-brown)}
.ai-price-divider{height:1px;background:var(--ai-divider)}
.ai-mini-benefits{display:flex;flex-direction:column;gap:10px}
.ai-mini-benefit{display:flex;align-items:flex-start;gap:8px;font-size:13px;color:var(--ai-text-body);line-height:1.5}
.ai-mini-benefit img{width:16px;height:16px;flex-shrink:0;margin-top:1.5px}
.ai-buy{display:flex;align-items:center;justify-content:center;gap:8px;padding:14px;border-radius:12px;background:var(--grad-gold);font-size:15px;font-weight:700;color:var(--ai-gold-ink);cursor:pointer;border:none;transition:filter .15s,transform .12s}
.ai-buy img{width:16px;height:16px}
.ai-buy:hover{filter:brightness(1.04);transform:translateY(-1px)}
.ai-buy:active{transform:scale(.97)}
.ai-notice{display:flex;align-items:center;gap:10px;padding:12px 14px 12px 12px;border-radius:12px;background:var(--grad-indigo2)}
.ai-notice img.ai-notice-tip{width:18px;height:18px;flex-shrink:0}
.ai-notice span{flex:1;font-size:13px;font-weight:500;color:#fff;line-height:1.4}
.ai-notice img.ai-notice-close{width:16px;height:16px;cursor:pointer;flex-shrink:0}
.ai-pay-row{display:flex;gap:10px}
.ai-pay-opt{flex:1;display:flex;align-items:center;justify-content:center;gap:8px;padding:10px;border-radius:10px;background:rgba(255,255,255,.7);border:1px solid var(--ai-border);font-size:13px;font-weight:500;color:var(--ai-text-body);cursor:pointer;transition:all .15s;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.ai-pay-opt:hover{border-color:var(--ai-blue);background:var(--ai-soft-blue);transform:translateY(-1px)}
.ai-pay-opt img{width:18px;height:18px}
.ai-price-terms{text-align:center;font-size:11px;color:var(--ai-text-3)}
.ai-price-terms a{color:var(--ai-blue)}
.ai-pay-note{font-size:11px;color:var(--ai-text-3);line-height:1.5;text-align:center}

/* 版本对比区 */
.ai-compare{display:flex;gap:20px;padding:0 40px 24px}
@media(max-width:1100px){.ai-compare{flex-direction:column;padding:0 16px 24px}}
.ai-compare-card{flex:1;display:flex;flex-direction:column;gap:10px;padding:22px;border-radius:16px;background:rgba(255,255,255,.72);box-shadow:var(--glass-shadow);
  -webkit-backdrop-filter:blur(16px) saturate(160%);backdrop-filter:blur(16px) saturate(160%);border:1px solid var(--glass-brd);transition:transform .25s var(--ease),box-shadow .25s var(--ease)}
.ai-compare-card:hover{transform:translateY(-4px);box-shadow:var(--glass-shadow-hover)}
.ai-compare-card.pro{border:1px solid var(--ai-gold);box-shadow:0 8px 24px rgba(255,179,51,.18)}
.ai-compare-head{display:flex;align-items:center;gap:8px}
.ai-compare-head h2{font-size:16px;font-weight:700;color:var(--ai-text-1)}
.ai-reco-badge{padding:4px 10px;border-radius:999px;background:var(--grad-gold);font-size:11px;font-weight:700;color:var(--ai-gold-ink)}
.ai-compare-sub{font-size:12px;color:var(--ai-text-3)}
.ai-compare-divider{height:1px;background:var(--ai-divider)}
.ai-compare-card.pro .ai-compare-divider{background:#FFF3D6}
.ai-compare-feats{display:flex;flex-direction:column;gap:8px}
.ai-compare-feat{display:flex;align-items:flex-start;gap:8px;font-size:13px;line-height:1.5}
.ai-compare-feat img{width:16px;height:16px;flex-shrink:0;margin-top:1.5px}
.ai-compare-card.free .ai-compare-feat{color:var(--ai-text-2)}
.ai-compare-card.pro .ai-compare-feat{color:var(--ai-text-1);font-weight:500}
.ai-compare-price{font-size:15px;font-weight:700;margin-top:8px}
.ai-compare-card.pro .ai-compare-price{color:var(--ai-gold-brown)}

/* 会员打通条 */
.ai-unify-wrap{padding:0 40px 20px}
@media(max-width:860px){.ai-unify-wrap{padding:0 16px 20px}}
.ai-unify-bar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 24px;border-radius:16px;background:linear-gradient(135deg,rgba(240,247,255,.85),rgba(235,250,255,.85));border:1px solid #D9EDFF;
  -webkit-backdrop-filter:blur(12px) saturate(160%);backdrop-filter:blur(12px) saturate(160%);transition:transform .2s var(--ease)}
.ai-unify-bar:hover{transform:translateY(-2px)}
@media(max-width:860px){.ai-unify-bar{flex-direction:column;align-items:flex-start}}
.ai-unify-left{display:flex;align-items:center;gap:12px}
.ai-unify-left img{width:32px;height:32px}
.ai-unify-copy{display:flex;flex-direction:column;gap:3px}
.ai-unify-copy b{font-size:14px;font-weight:600;color:var(--ai-blue)}
.ai-unify-copy span{font-size:12px;color:var(--ai-text-2)}
.ai-unify-btn{display:inline-flex;align-items:center;gap:6px;padding:9px 16px;border-radius:999px;background:var(--ai-blue);font-size:13px;font-weight:500;color:#fff;white-space:nowrap;cursor:pointer;border:none;transition:filter .15s,transform .12s}
.ai-unify-btn img{width:14px;height:14px}
.ai-unify-btn:hover{filter:brightness(1.05);transform:translateY(-1px)}
.ai-unify-btn:active{transform:scale(.96)}
.ai-pro-disclaimer{text-align:center;font-size:11px;color:var(--ai-text-3);padding:0 40px 28px;line-height:1.6}
@media(max-width:860px){.ai-pro-disclaimer{padding:0 16px 28px}}

/* ---------- 响应式 ---------- */
@media(max-width:960px){
  .ai-quota-card{min-width:auto;flex:1}
  .ai-input-row{flex-wrap:wrap}
}

/* 移动端 / 平板：侧栏抽屉化 + 输入区压缩 */
@media(max-width:860px){
  .ai-title-hero{height:48px}
  .ai-side-toggle{display:inline-flex}
  .ai-side{position:fixed;left:0;top:0;bottom:0;width:300px;max-width:84vw;height:100vh;height:100dvh;z-index:70;border-radius:0 18px 18px 0;box-shadow:0 24px 60px rgba(23,26,28,.28);transform:translateX(-104%);transition:transform .3s var(--ease);background:rgba(255,255,255,.96)}
  .ai-side.open{transform:translateX(0)}
  .ai-side-mask{position:fixed;inset:0;background:rgba(15,27,45,.36);z-index:65;display:none;backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px)}
  .ai-side-mask.open{display:block}
  .ai-chat-top{padding:10px 14px 10px}
  .ai-scene-label{font-size:12px}
  .ai-clear-btn{padding:5px 11px;font-size:11.5px}
  .ai-quick-row{flex-wrap:nowrap;overflow-x:auto;padding-bottom:4px;-webkit-overflow-scrolling:touch;scrollbar-width:none}
  .ai-quick-row::-webkit-scrollbar{display:none}
  .ai-quick-chip{flex-shrink:0;white-space:nowrap}
  .ai-input-row{gap:8px}
  .ai-upload{width:42px;height:42px}
  .ai-model-select{height:42px;padding:0 10px;max-width:118px}
  .ai-ms-main b{font-size:12px}
  .ai-ms-main i{font-size:9.5px}
  .ai-send{width:46px;height:46px;border-radius:13px}
  .ai-send img{width:22px;height:22px}
  .ai-msgs{padding:16px 14px 12px;gap:16px}
  .ai-msg{max-width:100%}
  .ai-bubble-user,.ai-msg.user .ai-bubble{max-width:78%}
  .ai-model-panel{width:92vw;border-radius:16px}
}

@media(max-width:420px){
  .ai-brand-logo img{height:42px}
  .ai-input-zone{padding:12px 12px 14px}
  .ai-quota-card{padding:12px 16px;gap:12px}
  .ai-quota-progress{width:80px}
  .ai-quota-value{font-size:19px}
  .ai-scene-label b{display:block}
}

/* 尊重「减少动效」偏好 */
@media (prefers-reduced-motion: reduce){
  .ai-page::before,.ai-page::after,.ai-pro-page::before,.ai-pro-page::after,
  .ai-send.busy,.ai-msg,.ai-welcome,.ai-title-hero{animation:none}
  *{transition:none!important}
}

/* ============================================================
   移动端顶级体验 v2（2026-08-26）· 覆盖块（桌面 >860px 零影响）
   设计目标：对标 ChatGPT / Kimi / 豆包 单列式原生聊天体验
   ============================================================ */
/* 桌面隐藏 mobile-only 节点 */
.ai-mobile-only{display:none}
.ai-mobile-header,.ai-mobile-input-bar,.ai-scene-mask,.ai-ctx-mask,
.ai-side-user-card,.ai-side-tabs{display:none}

@media(max-width:860px){
  /* ---- 移动端专属节点显示 ---- */
  .ai-mobile-only{display:flex}
  .ai-mobile-header{display:flex}
  .ai-mobile-input-bar{display:flex}
  .ai-side-user-card{display:flex}
  .ai-side-tabs{display:flex}

  /* ---- 沉浸式：隐藏全局 nav/footer（#/ai 接管全屏） ---- */
  .topnav,.topnav-actions,.mobile-menu,#toastRoot,.site-footer{display:none!important}
  body{padding-top:0!important}
  #app{padding-top:0!important}
  main#app{padding:0!important}

  /* ---- 页面容器：去阴影全屏，聊天 App 化 ---- */
  .ai-page{padding:0;background:
    radial-gradient(900px 480px at 70% 0%, rgba(173,203,253,.38), transparent 60%),
    linear-gradient(175deg,#EAF2FC 0%,#E3EDFB 55%,#E6EFFC 100%)}
  .ai-page .ai-inner{max-width:none;padding:0}
  .ai-page::before,.ai-page::after{display:none}

  /* ---- 紧凑 Header（56px 单行） ---- */
  .ai-head{display:flex;flex-direction:row;align-items:center;justify-content:space-between;
    gap:0;padding:calc(var(--ai-safe-top) + 6px) 14px 6px;margin:0;height:auto;min-height:52px;
    background:var(--ai-mobile-header-bg);-webkit-backdrop-filter:blur(20px) saturate(180%);backdrop-filter:blur(20px) saturate(180%);
    position:sticky;top:0;z-index:40;border-bottom:1px solid var(--ai-mobile-border)}
  .ai-head .ai-brand-logo,.ai-head .ai-quota-card{display:none}
  .ai-mobile-header{flex:1;flex-direction:row;align-items:center;gap:8px}
  .ai-mobile-toggle{width:var(--ai-touch-target);height:var(--ai-touch-target);border:none;background:none;border-radius:12px;
    display:flex;align-items:center;justify-content:center;cursor:pointer;color:var(--ai-mobile-text-1);flex-shrink:0}
  .ai-mobile-toggle img{width:20px;height:20px}
  .ai-mobile-toggle:active{background:rgba(15,27,45,.06)}
  .ai-mobile-scene{display:flex;align-items:center;gap:6px;height:36px;padding:0 12px;border-radius:999px;
    background:#fff;border:1px solid var(--ai-mobile-border);font-size:13px;font-weight:600;color:var(--ai-mobile-text-1);
    cursor:pointer;max-width:150px;box-shadow:0 1px 4px rgba(15,27,45,.05)}
  .ai-mobile-scene .ai-mobile-scene-name{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .ai-mobile-scene .ai-mobile-scene-caret{width:12px;height:12px;flex-shrink:0;color:#7A90C0}
  .ai-mobile-scene:active{transform:scale(.97)}
  .ai-mobile-quota{display:flex;align-items:center;gap:4px;height:36px;padding:0 10px;border-radius:999px;
    background:linear-gradient(135deg,#FFF6E5,#FFEFD6);border:1px solid #FFD9A0;font-size:12px;font-weight:700;color:#8A5A00;cursor:pointer;flex-shrink:0}
  .ai-mobile-quota:active{transform:scale(.97)}
  .ai-mobile-quota .ai-mobile-quota-icon{font-size:13px}
  .ai-mobile-quota.low{background:linear-gradient(135deg,#FFEDEB,#FFE0DC);border-color:#FFB3AC;color:#C53030}
  .ai-mobile-user{width:var(--ai-touch-target);height:var(--ai-touch-target);border-radius:50%;background:linear-gradient(135deg,#0066FF,#00B8FF);
    display:flex;align-items:center;justify-content:center;cursor:pointer;border:none;color:#fff;flex-shrink:0;position:relative;box-shadow:0 3px 10px rgba(0,102,255,.28)}
  .ai-mobile-user .ai-mobile-user-dot{width:16px;height:16px;border-radius:50%;background:#fff;opacity:.9}
  .ai-mobile-user:active{transform:scale(.94)}

  /* ---- 隐藏桌面元素 ---- */
  .ai-tabs{display:none}
  .ai-demo-tip{margin:6px 14px 0;padding:8px 12px;font-size:11.5px;border-radius:10px}
  .ai-chat-top{display:none}
  .ai-side-toggle{display:none}

  /* ---- 主体：全屏单列 ---- */
  .ai-shell{display:block;padding:0}
  .ai-main{height:calc(100vh - var(--ai-header-h-mobile) - var(--ai-safe-top));height:calc(100dvh - var(--ai-header-h-mobile) - var(--ai-safe-top));
    min-height:0;border-radius:0;border:none;box-shadow:none;background:transparent;
    -webkit-backdrop-filter:none;backdrop-filter:none}
  .ai-msgs{padding:14px 14px calc(var(--ai-input-h-mobile) + var(--ai-safe-bottom) + 20px);gap:16px;background:transparent}

  /* ---- 消息气泡（原生 App 质感） ---- */
  .ai-msg{max-width:88%;gap:10px}
  .ai-msg .ai-avatar{width:36px;height:36px;border-radius:50%}
  .ai-msg.ai .ai-avatar img{width:36px;height:36px;border-radius:50%}
  .ai-msg.ai .ai-bubble{border-radius:18px 18px 18px 5px;padding:14px 16px;font-size:14.5px;line-height:1.75;
    background:rgba(255,255,255,.96);border:1px solid rgba(15,27,45,.04);box-shadow:0 2px 10px rgba(15,27,45,.05)}
  .ai-msg.user .ai-bubble{max-width:82%;border-radius:18px 18px 5px 18px;font-size:14.5px;line-height:1.7;padding:12px 16px}
  .ai-reply-tag-row{gap:6px}
  .ai-tag{padding:2px 8px;font-size:10.5px}
  .ai-note{font-size:10.5px}
  .ai-feedback-row{gap:6px}
  .ai-fb-btn{padding:5px 10px;font-size:11.5px;border-radius:999px}
  .ai-fb-btn img{width:12px;height:12px}

  /* ---- 输入区：fixed 吸底 + iOS 安全区 ---- */
  .ai-input-zone{position:fixed;left:0;right:0;bottom:0;z-index:45;display:flex;flex-direction:column;gap:8px;
    padding:10px 14px calc(10px + var(--ai-safe-bottom));
    background:var(--ai-mobile-header-bg);-webkit-backdrop-filter:blur(24px) saturate(180%);backdrop-filter:blur(24px) saturate(180%);
    border-top:1px solid var(--ai-mobile-border);box-shadow:0 -8px 30px rgba(15,27,45,.06)}
  .ai-img-preview{display:flex;flex-wrap:wrap;gap:8px}
  .ai-quick-row{display:none}          /* quick chips 移入欢迎态，对话后不占输入区 */
  .ai-input-row{display:none}          /* 桌面输入行整体隐藏 */
  .ai-input-note{display:none}         /* 移动端合规说明移到欢迎态底部或忽略 */
  .ai-mobile-input-bar{flex-direction:row;align-items:flex-end;gap:8px}
  .ai-mobile-attach{width:var(--ai-touch-target);height:var(--ai-touch-target);border-radius:14px;border:1px solid var(--ai-mobile-border);
    background:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;flex-shrink:0;color:var(--ai-mobile-text-2)}
  .ai-mobile-attach img{width:20px;height:20px}
  .ai-mobile-attach:active{transform:scale(.94);background:rgba(15,27,45,.04)}
  .ai-mobile-input{flex:1;min-width:0;background:#fff;border:1.5px solid #DCE3EE;border-radius:22px;padding:8px 16px;
    display:flex;align-items:center;transition:border-color .18s,box-shadow .18s;box-shadow:0 1px 4px rgba(15,27,45,.04)}
  .ai-mobile-input:focus-within{border-color:var(--ai-blue);box-shadow:0 0 0 4px rgba(0,102,255,.14)}
  .ai-mobile-input textarea{flex:1;min-width:0;border:none;background:none;outline:none;resize:none;font-size:15px;line-height:1.5;
    max-height:96px;color:var(--ai-mobile-text-1);font-family:inherit;padding:4px 0}
  .ai-mobile-input textarea::placeholder{color:var(--ai-mobile-text-3)}
  .ai-mobile-model{display:flex;align-items:center;gap:3px;height:36px;padding:0 9px;border-radius:12px;background:#F4F7FC;
    border:1px solid #E3EAF6;font-size:11px;font-weight:600;color:var(--ai-mobile-text-2);cursor:pointer;flex-shrink:0;max-width:96px}
  .ai-mobile-model span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .ai-mobile-model img{width:10px;height:10px;flex-shrink:0}
  .ai-mobile-send{width:var(--ai-touch-target);height:var(--ai-touch-target);border-radius:50%;flex-shrink:0;
    background:var(--grad-blue);border:none;display:flex;align-items:center;justify-content:center;color:#fff;cursor:pointer;
    box-shadow:0 4px 14px rgba(0,102,255,.35);transition:transform .12s var(--ease)}
  .ai-mobile-send img{width:20px;height:20px}
  .ai-mobile-send:active{transform:scale(.88)}

  /* ---- 抽屉：原生侧滑 + 用户卡 + tabs ---- */
  .ai-side{width:320px;max-width:88vw;padding:0;display:flex;flex-direction:column;background:rgba(255,255,255,.98);
    border-radius:0 20px 20px 0;transform:translateX(-104%);transition:transform .28s var(--ease);z-index:80;overflow:hidden}
  .ai-side.open{transform:translateX(0);box-shadow:0 24px 60px rgba(15,27,45,.3)}
  .ai-side-user-card{flex-direction:row;align-items:center;gap:12px;padding:calc(var(--ai-safe-top) + 16px) 18px 14px;
    background:linear-gradient(150deg,#0F1B2D 0%,#1B2A52 60%,#24377A 100%);color:#fff}
  .ai-side-user-avatar{width:52px;height:52px;border-radius:16px;background:linear-gradient(135deg,#0066FF,#00B8FF);
    display:flex;align-items:center;justify-content:center;font-size:24px;box-shadow:0 6px 16px rgba(0,102,255,.4)}
  .ai-side-user-info{flex:1;display:flex;flex-direction:column;gap:4px;min-width:0}
  .ai-side-user-info b{font-size:16px;font-weight:700}
  .ai-side-user-info i{font-style:normal;font-size:12px;color:#B9C6F0}
  .ai-side-user-close{width:32px;height:32px;border-radius:10px;border:none;background:rgba(255,255,255,.12);color:#fff;
    font-size:14px;cursor:pointer;display:flex;align-items:center;justify-content:center}
  .ai-side-tabs{flex-direction:row;gap:6px;padding:12px 16px 4px}
  .ai-side-tab{flex:1;height:40px;border-radius:11px;border:none;background:#F3F6FC;font-size:13px;font-weight:600;color:var(--ai-mobile-text-2);cursor:pointer}
  .ai-side-tab.on{background:var(--grad-blue);color:#fff;box-shadow:0 3px 10px rgba(0,102,255,.25)}
  .ai-new-btn{margin:10px 16px 4px;border-radius:12px;padding:13px;font-size:14px}
  .ai-conv-list{flex:1;overflow-y:auto;padding:4px 12px}
  .ai-pro-card{margin:8px 14px calc(14px + var(--ai-safe-bottom));border-radius:16px;padding:15px 16px}
  .ai-pro-btn{border-radius:999px}

  /* ---- 场景切换 ActionSheet ---- */
  .ai-scene-mask{position:fixed;inset:0;background:rgba(15,27,45,.42);z-index:90;align-items:flex-end;justify-content:center;
    display:none;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}
  .ai-scene-mask.open{display:flex}
  .ai-scene-sheet{width:100%;max-width:560px;background:#fff;border-radius:22px 22px 0 0;padding:18px 16px calc(16px + var(--ai-safe-bottom));
    box-shadow:0 -16px 50px rgba(15,27,45,.2);animation:aiSheetUp .28s cubic-bezier(.32,.72,0,1)}
  @keyframes aiSheetUp{from{transform:translateY(100%)}to{transform:none}}
  .ai-sheet-head{display:flex;align-items:center;justify-content:space-between;padding:4px 4px 12px}
  .ai-sheet-title{font-size:16px;font-weight:700;color:var(--ai-mobile-text-1)}
  .ai-sheet-close{width:30px;height:30px;border-radius:9px;border:none;background:#F3F6FC;color:var(--ai-mobile-text-2);cursor:pointer;font-size:13px}
  .ai-scene-list{display:flex;flex-direction:column;gap:8px}
  .ai-scene-item{display:flex;align-items:center;gap:12px;padding:13px 14px;border-radius:14px;border:1px solid var(--ai-mobile-border);
    background:#fff;cursor:pointer;width:100%;text-align:left;transition:background .15s}
  .ai-scene-item:active{background:#F4F7FC}
  .ai-scene-item.on{background:var(--grad-lightblue);border-color:#C7D9FF}
  .ai-scene-ico{width:38px;height:38px;border-radius:11px;background:#F0F4FF;display:flex;align-items:center;justify-content:center;font-size:19px;flex-shrink:0}
  .ai-scene-meta{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}
  .ai-scene-meta b{font-size:14px;font-weight:600;color:var(--ai-mobile-text-1)}
  .ai-scene-meta i{font-style:normal;font-size:11px;color:var(--ai-mobile-text-3)}
  .ai-scene-check{width:22px;height:22px;border-radius:50%;background:var(--grad-blue);color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;flex-shrink:0}
  .ai-sheet-cancel{width:100%;margin-top:12px;padding:13px;border-radius:14px;border:none;background:#F3F6FC;font-size:14px;font-weight:600;color:var(--ai-mobile-text-2);cursor:pointer}
  .ai-sheet-cancel:active{background:#E8EDF6}

  /* ---- 长按消息 ActionSheet ---- */
  .ai-ctx-mask{position:fixed;inset:0;background:rgba(15,27,45,.42);z-index:92;align-items:flex-end;justify-content:center;
    display:none;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}
  .ai-ctx-mask.open{display:flex}
  .ai-ctx-sheet{width:100%;max-width:560px;background:#fff;border-radius:22px 22px 0 0;padding:12px 16px calc(12px + var(--ai-safe-bottom));
    box-shadow:0 -16px 50px rgba(15,27,45,.2);animation:aiSheetUp .28s cubic-bezier(.32,.72,0,1)}
  .ai-ctx-act{width:100%;text-align:center;padding:14px;border:none;background:none;font-size:15px;font-weight:600;color:var(--ai-mobile-text-1);cursor:pointer;border-radius:12px}
  .ai-ctx-act:active{background:#F4F7FC}
  .ai-ctx-cancel{width:100%;margin-top:8px;padding:14px;border-radius:14px;border:none;background:#F3F6FC;font-size:15px;font-weight:600;color:var(--ai-mobile-text-2);cursor:pointer}
  .ai-ctx-cancel:active{background:#E8EDF6}

  /* ---- 模型弹层移动端适配 ---- */
  .ai-model-mask{align-items:flex-end}
  .ai-model-panel{width:100%;max-width:560px;border-radius:22px 22px 0 0;padding:18px 16px calc(16px + var(--ai-safe-bottom));max-height:78vh}
}

@media(max-width:420px){
  .ai-head{padding:calc(var(--ai-safe-top) + 5px) 10px 5px}
  .ai-mobile-scene{max-width:118px;font-size:12px;height:34px}
  .ai-mobile-quota{padding:0 8px;font-size:11px}
  .ai-msg{max-width:92%}
  .ai-msg.user .ai-bubble,.ai-bubble-user{max-width:88%}
  .ai-mobile-model{display:none}   /* 极窄屏模型选择并入输入框长按，简化 */
  .ai-msgs{padding-left:10px;padding-right:10px}
  .ai-mobile-input textarea{font-size:15px}
}

/* 横屏 / 平板（861-1024）保持桌面布局的轻微适配 */
@media(min-width:861px) and (max-width:1024px){
  .ai-brand-logo img{height:52px}
  .ai-head{padding:24px 24px 18px}
  .ai-side{width:264px}
}