/* 开卷 · 初中道德与法治开卷速查台 — 印象派主题 */
:root{
  --ink:#2b2a33;
  --ink-soft:#54515f;
  --paper:#f6f1e7;            /* 旧纸 */
  --paper-2:#efe7d6;
  --seal:#c0432f;            /* 朱印红 */
  --seal-deep:#9c3322;
  --gold:#c8a24a;
  --water:#5b8aa6;           /* 莫奈水蓝 */
  --leaf:#7fa45e;            /* 春叶绿 */
  --lilac:#9a86c4;
  --peach:#e6a98c;
  --glass:rgba(255,253,248,.62);
  --glass-line:rgba(120,100,70,.18);
  --shadow:0 14px 40px -18px rgba(60,45,30,.5);
  --radius:20px;
  --serif:"Noto Serif SC",serif;
  --sans:"Noto Sans SC",system-ui,sans-serif;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0;padding:0}
body{
  font-family:var(--sans);
  color:var(--ink);
  background:var(--paper);
  min-height:100vh;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* ---------- 印象派背景 ---------- */
.canvas-bg{position:fixed;inset:0;z-index:-2;overflow:hidden;
  background:
    radial-gradient(120% 90% at 12% 8%, #f7f2e6 0%, #efe6d4 45%, #e7dcc6 100%);
}
.blob{position:absolute;border-radius:50%;filter:blur(60px);opacity:.5;mix-blend-mode:multiply;
  animation:drift 26s ease-in-out infinite alternate;}
.b1{width:46vw;height:46vw;left:-8vw;top:-10vw;background:radial-gradient(circle,#9fc0d8,transparent 70%);}
.b2{width:40vw;height:40vw;right:-6vw;top:2vw;background:radial-gradient(circle,#d8b48f,transparent 70%);animation-delay:-6s;}
.b3{width:50vw;height:50vw;left:18vw;bottom:-22vw;background:radial-gradient(circle,#a9c79a,transparent 70%);animation-delay:-12s;}
.b4{width:34vw;height:34vw;right:8vw;bottom:-8vw;background:radial-gradient(circle,#c2aede,transparent 70%);animation-delay:-3s;}
.b5{width:26vw;height:26vw;left:40vw;top:24vw;background:radial-gradient(circle,#e6b9a0,transparent 70%);animation-delay:-16s;}
@keyframes drift{from{transform:translate(0,0) scale(1)}to{transform:translate(3vw,2vw) scale(1.12)}}
.grain{position:absolute;inset:0;opacity:.06;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");}

/* ---------- 顶栏 ---------- */
.topbar{max-width:1180px;margin:0 auto;padding:26px 22px 8px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;}
.brand{display:flex;align-items:center;gap:16px;}
.seal{
  font-family:var(--serif);font-weight:900;font-size:26px;color:#fff;
  background:linear-gradient(135deg,var(--seal),var(--seal-deep));
  width:64px;height:64px;display:grid;place-items:center;border-radius:14px;
  letter-spacing:2px;writing-mode:vertical-rl;text-orientation:upright;line-height:1;
  box-shadow:0 8px 22px -8px rgba(160,50,30,.7), inset 0 0 0 2px rgba(255,255,255,.25);
  transform:rotate(-3deg);}
.brand-words h1{font-family:var(--serif);font-weight:700;font-size:clamp(20px,2.4vw,28px);margin:0;letter-spacing:.5px;}
.brand-words h1 .dim{color:var(--ink-soft);font-weight:400;}
.tagline{margin:2px 0 0;color:var(--ink-soft);font-size:13.5px;}
.tagline em{font-style:normal;color:var(--seal);font-weight:600;}
.src{font-size:13px;color:var(--ink-soft);text-decoration:none;padding:7px 12px;border-radius:999px;
  background:var(--glass);border:1px solid var(--glass-line);white-space:nowrap;}
.src:hover{color:var(--seal);}

/* ---------- 选书 ---------- */
.scope{max-width:1180px;margin:10px auto 0;padding:0 22px;display:flex;align-items:flex-start;gap:14px;flex-wrap:wrap;}
.scope-label{font-family:var(--serif);font-weight:600;color:var(--ink-soft);padding-top:6px;white-space:nowrap;}
.chips{display:flex;gap:8px;flex-wrap:wrap;}
.chip{cursor:pointer;border:1px solid var(--glass-line);background:var(--glass);color:var(--ink-soft);
  padding:6px 14px;border-radius:999px;font-size:13.5px;font-weight:500;transition:.18s;backdrop-filter:blur(6px);}
.chip:hover{transform:translateY(-1px);color:var(--ink);}
.chip.on{background:linear-gradient(135deg,var(--seal),var(--seal-deep));color:#fff;border-color:transparent;
  box-shadow:0 6px 16px -8px rgba(160,50,30,.6);}
.chip.all{font-weight:700;}
.loading-chip{color:var(--ink-soft);font-size:13px;padding:6px 0;}

/* ---------- 双栏 ---------- */
.panes{max-width:1180px;margin:18px auto 0;padding:0 22px 40px;display:grid;
  grid-template-columns:1fr 1fr;gap:20px;align-items:start;}
.pane{background:var(--glass);border:1px solid var(--glass-line);border-radius:var(--radius);
  box-shadow:var(--shadow);backdrop-filter:blur(14px) saturate(1.1);overflow:hidden;
  display:flex;flex-direction:column;min-height:540px;}
.pane-head{padding:18px 20px 6px;}
.pane-head h2{font-family:var(--serif);font-size:19px;margin:0;font-weight:700;}
.pane-head .hint{font-size:12.5px;color:var(--ink-soft);}

/* 检索 */
.search-form{display:flex;gap:8px;padding:10px 20px 6px;}
.search-form input{flex:1;border:1px solid var(--glass-line);background:rgba(255,255,255,.7);
  border-radius:12px;padding:11px 14px;font-size:15px;font-family:var(--sans);color:var(--ink);outline:none;}
.search-form input:focus{border-color:var(--water);box-shadow:0 0 0 3px rgba(91,138,166,.18);}
.search-form button{border:none;background:linear-gradient(135deg,var(--water),#46708a);color:#fff;
  font-weight:600;padding:0 18px;border-radius:12px;cursor:pointer;font-family:var(--sans);font-size:14.5px;}
.search-form button:hover{filter:brightness(1.06);}
.search-meta{padding:4px 20px;font-size:12.5px;color:var(--ink-soft);min-height:18px;}
.results{flex:1;overflow:auto;padding:6px 16px 18px;}
.placeholder{padding:30px 16px;color:var(--ink-soft);font-size:14px;text-align:center;}

.result-card{display:flex;gap:14px;padding:12px;border-radius:14px;cursor:pointer;
  border:1px solid transparent;transition:.16s;margin-bottom:8px;}
.result-card:hover{background:rgba(255,255,255,.55);border-color:var(--glass-line);}
.result-thumb{width:84px;flex:0 0 84px;border-radius:8px;overflow:hidden;background:var(--paper-2);
  box-shadow:0 6px 14px -8px rgba(60,45,30,.5);position:relative;}
.result-thumb img{width:100%;display:block;}
.result-thumb .pg{position:absolute;left:0;bottom:0;background:var(--seal);color:#fff;font-size:11px;
  padding:1px 6px;border-radius:0 8px 0 6px;font-weight:600;}
.result-info{flex:1;min-width:0;}
.result-book{font-size:12px;color:var(--seal);font-weight:600;}
.result-head{font-family:var(--serif);font-size:14.5px;font-weight:600;margin:2px 0;}
.result-snip{font-size:13px;color:var(--ink-soft);max-height:3.2em;overflow:hidden;}
.result-snip mark{background:rgba(200,162,74,.4);color:var(--ink);border-radius:3px;padding:0 1px;}

/* 对话 */
.thread{flex:1;overflow:auto;padding:14px 18px;display:flex;flex-direction:column;gap:14px;}
.msg{display:flex;}
.msg.user{justify-content:flex-end;}
.bubble{max-width:88%;padding:12px 15px;border-radius:16px;font-size:14.5px;line-height:1.62;
  box-shadow:0 6px 18px -12px rgba(60,45,30,.5);}
.msg.assistant .bubble{background:rgba(255,255,255,.78);border:1px solid var(--glass-line);border-top-left-radius:5px;}
.msg.user .bubble{background:linear-gradient(135deg,#3e6a82,#345a70);color:#fff;border-top-right-radius:5px;}
.bubble p{margin:0 0 8px;}.bubble p:last-child{margin-bottom:0;}
.bubble ul{margin:6px 0;padding-left:20px;}.bubble li{margin:3px 0;}
.bubble em{color:var(--seal);font-style:normal;font-weight:600;}
.msg.user .bubble em{color:#ffe;}
.bubble .tiny{font-size:12px;color:var(--ink-soft);}
.bubble strong{font-weight:700;}
.bubble.thinking{color:var(--ink-soft);font-style:italic;}
.dots::after{content:"";animation:dots 1.3s steps(4,end) infinite;}
@keyframes dots{0%{content:""}25%{content:"·"}50%{content:"··"}75%{content:"···"}}

/* 引用书影 */
.cite{display:inline-flex;flex-direction:column;gap:3px;margin:8px 8px 4px 0;vertical-align:top;cursor:pointer;
  width:120px;}
.cite img{width:120px;border-radius:8px;border:1px solid var(--glass-line);
  box-shadow:0 8px 18px -10px rgba(60,45,30,.6);transition:.16s;background:var(--paper-2);}
.cite:hover img{transform:translateY(-2px);box-shadow:0 12px 22px -10px rgba(60,45,30,.7);}
.cite .cap{font-size:11.5px;color:var(--seal);font-weight:600;text-align:center;}
.cites-wrap{display:flex;flex-wrap:wrap;margin-top:6px;}

/* 拍照分析里的考点关键词 */
.kw-row{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px;}
.kw{font-size:12px;background:rgba(127,164,94,.18);color:#4f6b39;border:1px solid rgba(127,164,94,.35);
  border-radius:999px;padding:3px 10px;cursor:pointer;}
.kw:hover{background:rgba(127,164,94,.3);}

/* 输入区 */
.chat-form{border-top:1px solid var(--glass-line);padding:10px 14px 14px;background:rgba(255,255,255,.35);}
.img-preview{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px;}
.img-preview .pv{position:relative;}
.img-preview img{height:64px;border-radius:8px;border:1px solid var(--glass-line);}
.img-preview .rm{position:absolute;top:-6px;right:-6px;background:var(--seal);color:#fff;border:none;
  width:20px;height:20px;border-radius:50%;cursor:pointer;font-size:13px;line-height:1;}
.chat-input-row{display:flex;align-items:flex-end;gap:8px;}
.upload-btn{flex:0 0 auto;width:40px;height:40px;display:grid;place-items:center;border-radius:11px;cursor:pointer;
  background:rgba(255,255,255,.7);border:1px solid var(--glass-line);color:var(--ink-soft);}
.upload-btn:hover{color:var(--seal);}
#chatInput{flex:1;resize:none;border:1px solid var(--glass-line);background:rgba(255,255,255,.78);
  border-radius:12px;padding:10px 13px;font-size:14.5px;font-family:var(--sans);color:var(--ink);outline:none;max-height:140px;}
#chatInput:focus{border-color:var(--water);box-shadow:0 0 0 3px rgba(91,138,166,.18);}
#chatSend{flex:0 0 auto;width:40px;height:40px;border:none;border-radius:11px;cursor:pointer;
  background:linear-gradient(135deg,var(--seal),var(--seal-deep));color:#fff;display:grid;place-items:center;}
#chatSend:hover{filter:brightness(1.07);}
#chatSend:disabled{opacity:.5;cursor:default;}

/* 灯箱 */
.lightbox{position:fixed;inset:0;z-index:50;background:rgba(30,24,18,.82);display:grid;place-items:center;
  backdrop-filter:blur(4px);padding:30px;}
.lightbox figure{margin:0;max-width:min(92vw,560px);max-height:92vh;display:flex;flex-direction:column;align-items:center;}
.lightbox img{max-width:100%;max-height:84vh;border-radius:10px;box-shadow:0 30px 80px -30px #000;background:var(--paper);}
.lightbox figcaption{color:#f3ead7;margin-top:12px;font-family:var(--serif);font-size:15px;}
.lb-close{position:absolute;top:18px;right:24px;background:none;border:none;color:#fff;font-size:34px;cursor:pointer;line-height:1;z-index:3;}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);width:54px;height:54px;border-radius:50%;border:none;cursor:pointer;
  background:rgba(255,255,255,.15);color:#fff;font-size:36px;line-height:1;display:grid;place-items:center;
  backdrop-filter:blur(6px);transition:.15s;z-index:2;padding-bottom:4px;}
.lb-nav:hover{background:rgba(255,255,255,.32);}
.lb-prev{left:16px;}.lb-next{right:16px;}
.lb-nav.off{opacity:.2;pointer-events:none;}
.lb-hint{position:absolute;bottom:14px;left:50%;transform:translateX(-50%);color:rgba(243,234,215,.55);font-size:12px;}

/* 页脚 */
.foot{max-width:1180px;margin:0 auto;padding:8px 22px 34px;color:var(--ink-soft);font-size:12.5px;
  display:flex;gap:8px;flex-wrap:wrap;align-items:center;}
.foot a{color:var(--water);text-decoration:none;}
.foot .sep{opacity:.5;}

/* 滚动条 */
.results::-webkit-scrollbar,.thread::-webkit-scrollbar{width:8px;}
.results::-webkit-scrollbar-thumb,.thread::-webkit-scrollbar-thumb{background:rgba(120,100,70,.25);border-radius:8px;}

/* 移动端栏目切换条（桌面端隐藏） */
.mobile-tabs{display:none;}

/* 响应式 */
@media(max-width:860px){
  .topbar{padding:18px 16px 6px;}
  .scope{padding:0 16px;}
  /* 分段切换：搜词定位 / 问 AI 各占满屏，避免长滚动 */
  .mobile-tabs{display:flex;gap:8px;max-width:1180px;margin:14px auto 0;padding:0 16px;position:sticky;top:0;z-index:6;}
  .mobile-tabs .mt{flex:1;border:1px solid var(--glass-line);background:var(--glass);backdrop-filter:blur(8px);
    color:var(--ink-soft);font-family:var(--serif);font-weight:600;font-size:15px;padding:11px 0;border-radius:12px;cursor:pointer;}
  .mobile-tabs .mt.on{background:linear-gradient(135deg,var(--seal),var(--seal-deep));color:#fff;border-color:transparent;
    box-shadow:0 6px 16px -8px rgba(160,50,30,.6);}
  .panes{grid-template-columns:1fr;margin-top:12px;padding:0 16px 30px;gap:0;}
  .pane{min-height:auto;}
  body:not(.m-chat) .pane-chat{display:none;}
  body.m-chat .pane-search{display:none;}
  .pane-chat .thread{max-height:none;min-height:48vh;}
  .pane-search .results{max-height:none;}
  /* iOS 聚焦不自动放大：输入字号 ≥16px */
  .search-form input,#chatInput{font-size:16px;}
  .result-thumb{flex:0 0 72px;width:72px;}
  /* 翻页键下移到底部角落，便于拇指点按 */
  .lb-nav{top:auto;bottom:calc(env(safe-area-inset-bottom,0px) + 16px);transform:none;width:58px;height:58px;}
  .lb-prev{left:18px;}.lb-next{right:18px;}
  .lb-hint{display:none;}
  .lightbox{padding:14px;}
  .lightbox figure{max-width:96vw;}
  .lightbox img{max-height:74vh;}
  .lightbox figcaption{font-size:13.5px;}
}
@media(max-width:520px){
  .brand-words h1{font-size:19px;}
  .seal{width:52px;height:52px;font-size:21px;}
  .tagline{font-size:12px;}
  .topbar .src{display:none;}
}