/* ══════════════════════════════════════════
   党建智能咨询平台 · 前台样式
   三套主题共用同一组语义变量：
   月白（默认浅色）· 丹霞（深色）· 赤焰（暖红）
   ══════════════════════════════════════════ */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}

::selection{background:var(--sel);color:var(--ink)}
:focus-visible{outline:2px solid var(--focus-ring);outline-offset:2px;border-radius:4px}
textarea:focus-visible{outline:none}
.input-wrapper:focus-within{box-shadow:0 0 0 3px var(--sel)}

:root{
  --red-primary:#c41e24;
  --red-dark:#8b0000;
  --red-light:#e04950;
  --gold:#a07316;
  --gold-light:#82590e;
  --dot:#22a06b;
  --dot-ring:rgba(34,160,107,.16);
  --focus-ring:rgba(196,30,36,.5);
  --sel:rgba(196,30,36,.14);

  --font-display:"Songti SC","STSong","Noto Serif SC","Source Han Serif SC","SimSun",Georgia,serif;
  --font-body:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",sans-serif;

  --r-lg:18px;--r-md:14px;--r-sm:10px;
  --safe-top:env(safe-area-inset-top,0px);
  --safe-bottom:env(safe-area-inset-bottom,0px);

  /* 月白（默认）*/
  --bg:#f5f0eb;
  --bg-deep:#efe7de;
  --surface:rgba(255,255,255,.9);
  --surface-2:rgba(44,24,16,.035);
  --surface-3:rgba(255,255,255,.72);
  --ink:#241a15;
  --ink-2:rgba(36,26,21,.66);
  --ink-3:rgba(36,26,21,.42);
  --hairline:rgba(44,24,16,.09);
  --hairline-2:rgba(44,24,16,.05);
  --gold-line:rgba(160,115,22,.34);
  --header-bg:linear-gradient(135deg,rgba(255,255,255,.94),rgba(250,245,239,.96));
  --bubble-ai:rgba(255,255,255,.94);
  --bubble-ai-border:rgba(44,24,16,.08);
  --bubble-user-border:rgba(255,255,255,.16);
  --composer-bg:rgba(255,255,255,.7);
  --bar-bg:rgba(255,255,255,.55);
  --shadow-card:0 1px 2px rgba(44,24,16,.04),0 12px 32px rgba(44,24,16,.07);
  --shadow-pop:0 4px 12px rgba(44,24,16,.08),0 18px 44px rgba(44,24,16,.12);
  --scroll-thumb:rgba(44,24,16,.14);
  --particle:rgba(196,30,36,.12);
  --overlay:rgba(36,26,21,.35);
  --sidebar-bg:linear-gradient(160deg,#fffdf9,var(--bg) 55%);

  /* 朱砂印章：红底 + 暖金字 + 内圈细金线 */
  --seal-fill:linear-gradient(140deg,var(--red-primary),var(--red-dark) 72%);
  --seal-ink:#f2d193;
  --seal-ring:rgba(255,232,190,.26);
  --seal-halo:0 0 0 3px rgba(255,255,255,.62);
  --seal-glow:rgba(139,0,0,.28);
  --mark-halo:0 0 0 6px rgba(196,30,36,.06),0 0 0 12px rgba(196,30,36,.03);
  --orbit-a:rgba(196,30,36,.62);
  --orbit-b:rgba(160,115,22,.5);
  --orbit-halo:rgba(196,30,36,.1);

  /* 发送按钮：浅色下为「宣纸圆章 + 朱砂箭头」，避免整块大红 */
  --send-fill:linear-gradient(168deg,#fffefc,#f0e6da);
  --send-ink:var(--red-dark);
  --send-line:rgba(160,115,22,.4);
  --send-ring:rgba(196,30,36,.16);
  --send-shadow:0 1px 2px rgba(44,24,16,.05),0 6px 16px rgba(44,24,16,.09);
  --send-hover-fill:linear-gradient(168deg,rgba(196,30,36,.1),rgba(139,0,0,.2));
  --send-hover-shadow:0 8px 20px rgba(139,0,0,.18);
  --send-ready-ring:rgba(255,240,215,.34);
  --send-ready-shadow:0 0 0 3px var(--sel),0 6px 18px rgba(139,0,0,.3);
}

html{font-size:16px;-webkit-text-size-adjust:100%}
body{
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--ink);
  height:100vh;height:100dvh;
  overflow:hidden;position:relative;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  -webkit-tap-highlight-color:transparent;
  overscroll-behavior:none;
  transition:background .35s ease,color .35s ease;
}

/* ── 触屏手感 ──
   手机上双击缩放会误吞单次点击，按钮统一禁用 double-tap-zoom；
   所有可点控件给一个 96ms 的按压回弹，代替桌面端的 hover 反馈。 */
button,.topic-btn,.quick-btn,.faq-card,.theme-dot,.msg-act{touch-action:manipulation}
.mobile-menu-btn:active,.header-action-btn:active,.drawer-close:active{transform:scale(.92);background:var(--surface-3)}
.quick-btn:active{transform:scale(.96)}
.theme-dot:active{transform:scale(.9)}
/* 专题卡与复制条只写了 hover，触屏上按下去没有任何回应，
   像"没点上"——补一组等价的按压态。 */
.faq-card:active{transform:translateY(0) scale(.985);border-color:rgba(196,30,36,.26);background:var(--surface)}
.msg-act:active{transform:scale(.94);color:var(--red-dark);border-color:rgba(196,30,36,.3)}
/* 视觉上控件可以做得紧凑，但拇指命中区必须补到 44×44：
   用透明外扩伪元素撑开，不占布局、不改圆角，也不会把版式撑胖。
   主题色点之间只隔 5px，横向不能外扩（会互相抢点击），所以只纵向加长。 */
.mobile-menu-btn,.header-action-btn,.drawer-close{position:relative}
.mobile-menu-btn::after,.header-action-btn::after,.drawer-close::after{
  content:"";position:absolute;inset:-8px;border-radius:inherit;
}
.theme-dot::before{content:"";position:absolute;top:-9px;bottom:-9px;left:-2px;right:-2px;border-radius:10px}
/* 触屏没有真正的 hover：点完主题色点不能让
   它一直停在放大态，按压反馈已经由 :active 承担。 */
@media(hover:none){
  .theme-dot:hover{transform:none}
  .stat-item:hover{background:var(--surface-3)}
}

/* ── 背景层 ── */
.bg-pattern{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(ellipse 90% 60% at 50% -8%,rgba(196,30,36,.09),transparent 62%),
    radial-gradient(ellipse 70% 50% at 88% 104%,rgba(160,115,22,.09),transparent 58%),
    radial-gradient(ellipse 55% 45% at 6% 88%,rgba(139,0,0,.05),transparent 55%),
    linear-gradient(180deg,var(--bg),var(--bg-deep));
}
.bg-particles{position:fixed;inset:0;z-index:0;overflow:hidden;pointer-events:none}
.particle{
  position:absolute;border-radius:50%;
  background:var(--particle);
  animation:float-up linear infinite;
}
@keyframes float-up{
  0%{transform:translateY(100vh) scale(0);opacity:0}
  10%{opacity:1}90%{opacity:1}
  100%{transform:translateY(-10vh) scale(1);opacity:0}
}

.app{
  position:relative;z-index:1;
  display:flex;flex-direction:column;
  height:100vh;height:100dvh;
  max-width:1240px;margin:0 auto;
  padding:14px;padding-top:calc(14px + var(--safe-top));
  padding-bottom:var(--safe-bottom);
}

/* ══════════ 顶栏 ══════════ */
.header{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:13px 22px;flex-shrink:0;
  background:var(--header-bg);
  border:1px solid var(--hairline);
  border-radius:var(--r-lg);
  backdrop-filter:blur(18px) saturate(140%);-webkit-backdrop-filter:blur(18px) saturate(140%);
  box-shadow:var(--shadow-card);
  position:relative;overflow:hidden;
}
.header::after{
  content:"";position:absolute;left:22px;right:22px;bottom:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--gold-line),transparent);
}
.header-left{display:flex;align-items:center;gap:13px;min-width:0}
.emblem{
  position:relative;
  width:44px;height:44px;flex-shrink:0;border-radius:50%;overflow:hidden;
  background:var(--seal-fill);
  border:1px solid var(--gold-line);
  box-shadow:var(--seal-halo),0 4px 14px var(--seal-glow);
  display:flex;align-items:center;justify-content:center;
  font-size:21px;color:var(--seal-ink);
  animation:seal-breathe 4.5s ease-in-out infinite;
}
.emblem::after,
.hero-mark::after,
.msg.ai .msg-avatar::after{
  content:"";position:absolute;inset:3px;border-radius:50%;
  border:1px solid var(--seal-ring);pointer-events:none;
}
@keyframes seal-breathe{
  0%,100%{box-shadow:var(--seal-halo),0 4px 14px var(--seal-glow)}
  50%{box-shadow:var(--seal-halo),0 6px 22px var(--seal-glow)}
}

/* ── 智能光环：绕标识旋转的双弧环
   首屏 Hero 常驻慢转，双环反向才有机械层次；消息列表里的弧环默认收起，
   悬停或 AI 正在生成时才点亮 —— 动效用来说明状态，不当背景噪声 ── */
@keyframes orbit-spin{to{transform:rotate(360deg)}}
@keyframes orbit-spin-rev{to{transform:rotate(-360deg)}}
@keyframes halo-pulse{
  0%,100%{box-shadow:0 2px 8px var(--seal-glow)}
  50%{box-shadow:0 2px 16px var(--seal-glow),0 0 0 5px var(--orbit-halo)}
}
.hero-mark::before{
  content:"";position:absolute;inset:-8px;border-radius:50%;pointer-events:none;
  border:1.5px solid transparent;
  border-top-color:var(--orbit-a);border-right-color:var(--orbit-b);
  animation:orbit-spin 9.5s linear infinite;
}
.hero-mark::after{
  inset:5px;border:1px solid transparent;
  border-bottom-color:var(--orbit-b);border-left-color:var(--orbit-a);
  animation:orbit-spin-rev 6.5s linear infinite;
}
.msg.ai .msg-avatar::before{
  content:"";position:absolute;inset:-4px;border-radius:50%;pointer-events:none;
  border:1.4px solid transparent;
  border-top-color:var(--orbit-a);border-right-color:var(--orbit-b);
  opacity:0;transition:opacity .3s ease;
  animation:orbit-spin 2.8s linear infinite;animation-play-state:paused;
}
.msg.ai .msg-avatar:hover::before{opacity:.9;animation-play-state:running}
.msg.ai.just-answered .msg-avatar::before{opacity:1;animation-play-state:running}
.msg.ai.just-answered .msg-avatar{animation:halo-pulse 1.2s ease-in-out 2}
#typing-msg .msg-avatar::before{opacity:1;animation-play-state:running}
#typing-msg .msg-avatar{animation:halo-pulse 1.6s ease-in-out infinite}
.header-title{min-width:0}
.brand-kicker{
  font-size:.62rem;letter-spacing:.22em;color:var(--gold);
  margin-bottom:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.header-title h1{
  font-family:var(--font-display);
  font-size:1.28rem;font-weight:600;letter-spacing:.08em;line-height:1.25;
  color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.header-title p{
  font-size:.68rem;color:var(--ink-3);letter-spacing:.12em;margin-top:2px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.header-right{display:flex;align-items:center;gap:12px;flex-shrink:0}
.clock-wrap{text-align:right;line-height:1.3}
.clock-date{font-size:.62rem;color:var(--ink-3);letter-spacing:.08em}
.time-display{
  font-size:.86rem;color:var(--gold);font-weight:600;
  font-variant-numeric:tabular-nums;letter-spacing:.04em;
}
.status-badge{
  display:flex;align-items:center;gap:7px;
  padding:6px 13px;border-radius:20px;
  background:var(--surface-2);border:1px solid var(--hairline);
  font-size:.7rem;color:var(--ink-2);letter-spacing:.06em;white-space:nowrap;
}
.status-dot{
  width:6px;height:6px;border-radius:50%;flex-shrink:0;
  background:var(--dot);box-shadow:0 0 0 3px var(--dot-ring);
  animation:blink 2.4s ease-in-out infinite;
}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.45}}

/* ══════════ 主体 ══════════ */
.main{display:flex;gap:14px;flex:1;margin-top:14px;min-height:0}

.sidebar{
  width:252px;flex-shrink:0;
  display:flex;flex-direction:column;gap:12px;
  overflow-y:auto;transition:transform .32s cubic-bezier(.4,0,.2,1);
  scrollbar-width:thin;
}
.side-card{
  background:var(--surface);border:1px solid var(--hairline);
  border-radius:var(--r-lg);padding:16px;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:var(--shadow-card);
}
.side-card h3{
  font-size:.68rem;font-weight:600;color:var(--gold);
  letter-spacing:.18em;display:flex;align-items:center;gap:7px;
  padding-bottom:10px;margin-bottom:12px;
  border-bottom:1px solid var(--hairline);
}
.side-ico{font-size:.85rem;filter:saturate(.8)}
.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--hairline-2);border-radius:var(--r-sm);overflow:hidden}
.stat-item{
  text-align:center;padding:11px 6px;background:var(--surface-3);
  transition:background .2s;
}
.stat-item:hover{background:var(--surface-2)}
.stat-num{
  font-family:var(--font-display);
  font-size:1.3rem;font-weight:600;color:var(--red-dark);
  font-variant-numeric:tabular-nums;letter-spacing:.02em;
}
.stat-label{font-size:.6rem;color:var(--ink-3);margin-top:3px;letter-spacing:.1em}

.topic-list{display:flex;flex-direction:column;counter-reset:topic}
.topic-btn{
  counter-increment:topic;
  display:flex;align-items:center;gap:9px;width:100%;
  padding:8px 10px;border-radius:var(--r-sm);
  background:transparent;border:1px solid transparent;border-left:2px solid transparent;
  color:var(--ink-2);font-size:.78rem;font-family:inherit;text-align:left;
  cursor:pointer;transition:all .22s ease;
}
.topic-btn::before{
  content:counter(topic,decimal-leading-zero);
  font-size:.6rem;color:var(--gold);letter-spacing:.06em;flex-shrink:0;
  font-variant-numeric:tabular-nums;opacity:.75;
}
.topic-label{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.topic-arrow{flex-shrink:0;opacity:0;transform:translateX(-4px);transition:all .22s;font-size:.72rem;color:var(--red-primary)}
.topic-btn:hover{
  background:var(--surface-2);border-left-color:var(--red-primary);color:var(--ink);
  padding-left:12px;
}
.topic-btn:hover .topic-arrow{opacity:1;transform:translateX(0)}
.topic-btn:active{transform:scale(.99)}

.side-note{
  font-family:var(--font-display);
  font-size:.68rem;color:var(--ink-3);line-height:1.9;letter-spacing:.06em;
  padding:12px 14px;border-radius:var(--r-md);
  border:1px dashed var(--hairline);background:var(--surface-2);
}

/* ══════════ 会话区 ══════════ */
.chat-area{
  flex:1;display:flex;flex-direction:column;position:relative;min-width:0;
  background:var(--surface);border:1px solid var(--hairline);
  border-radius:var(--r-lg);overflow:hidden;
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  box-shadow:var(--shadow-card);
}
.chat-header{
  padding:12px 18px;flex-shrink:0;gap:10px;position:relative;z-index:2;
  display:flex;align-items:center;justify-content:space-between;
  background:var(--bar-bg);border-bottom:1px solid var(--hairline);
}
/* 抬头底缘的投影：静止时完全透明，正文一滚起来就浮出一道极淡的阴影，
   把"上面还有内容"说清楚，同时让抬头与内容之间有了层次。 */
.chat-header::after{
  content:"";position:absolute;left:0;right:0;top:100%;height:14px;
  background:linear-gradient(180deg,rgba(44,24,16,.1),transparent);
  opacity:0;transition:opacity .28s ease;pointer-events:none;
}
.chat-header.lifted::after{opacity:1}
body[data-theme="danxia"] .chat-header::after,body[data-theme="chihong"] .chat-header::after{
  background:linear-gradient(180deg,rgba(0,0,0,.5),transparent);
}
.chat-header-left{display:flex;align-items:center;gap:11px;min-width:0}
.mobile-menu-btn{
  display:none;width:32px;height:32px;border-radius:var(--r-sm);flex-shrink:0;
  background:var(--surface-2);border:1px solid var(--hairline);
  color:var(--ink-2);cursor:pointer;font-size:.95rem;
  align-items:center;justify-content:center;
}
/* 聊天抬头不再放徽标：移动端整屏只保留顶栏 + 首屏两处印记，避免"连排三个 logo"。
   用一道金口线 + 呼吸圆点承担视觉锚点，比再加一个印章更克制。 */
.chat-header-rule{
  width:1px;height:26px;flex-shrink:0;
  background:linear-gradient(180deg,transparent,var(--gold-line),transparent);
}
.live-dot{
  display:inline-block;width:6px;height:6px;border-radius:50%;
  margin-left:7px;vertical-align:middle;
  background:var(--dot);box-shadow:0 0 0 3px var(--dot-ring);
  animation:blink 2.4s ease-in-out infinite;
}
.logo-img{width:100%;height:100%;object-fit:cover;border-radius:50%;display:block}
.chat-header-info{min-width:0}
.chat-header-info h4{
  font-family:var(--font-display);font-size:.95rem;font-weight:600;
  letter-spacing:.06em;color:var(--ink);
}
.chat-header-info span{display:block;font-size:.64rem;color:var(--ink-3);letter-spacing:.1em;margin-top:1px}
.chat-header-actions{display:flex;gap:7px;flex-shrink:0}
.header-action-btn{
  width:32px;height:32px;border-radius:var(--r-sm);
  background:var(--surface-2);border:1px solid var(--hairline);
  color:var(--ink-2);cursor:pointer;font-size:.85rem;
  display:flex;align-items:center;justify-content:center;transition:all .2s;
}
.header-action-btn:hover{background:rgba(196,30,36,.08);border-color:rgba(196,30,36,.28);color:var(--red-dark)}

/* 消息流 */
.messages{
  flex:1;overflow-y:auto;padding:22px 24px;
  display:flex;flex-direction:column;gap:18px;
  scroll-behavior:smooth;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;
}
.messages::-webkit-scrollbar{width:4px}
.messages::-webkit-scrollbar-track{background:transparent}
.messages::-webkit-scrollbar-thumb{background:var(--scroll-thumb);border-radius:4px}

.msg{display:flex;gap:11px;max-width:84%;animation:msg-in .34s cubic-bezier(.22,.68,.34,1)}
.msg.user{align-self:flex-end;flex-direction:row-reverse}
@keyframes msg-in{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
.msg-body{min-width:0;display:flex;flex-direction:column}
.msg.user .msg-body{align-items:flex-end}
.msg-name{font-size:.6rem;letter-spacing:.16em;color:var(--ink-3);margin-bottom:5px}
.msg-avatar{
  width:34px;height:34px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;font-size:15px;
}
.msg.ai .msg-avatar{
  position:relative;
  background:var(--seal-fill);
  border:1px solid var(--gold-line);color:var(--seal-ink);
  box-shadow:0 2px 8px var(--seal-glow);
}
.msg.user .msg-avatar{
  background:var(--surface-2);border:1px solid var(--hairline);color:var(--ink-2);
  font-size:14px;
}
.msg-bubble{
  padding:13px 17px;border-radius:4px 16px 16px 16px;
  font-size:.86rem;line-height:1.9;letter-spacing:.01em;
  word-break:break-word;position:relative;
}
.msg.ai .msg-bubble{
  background:var(--bubble-ai);border:1px solid var(--bubble-ai-border);
  border-left:2px solid var(--gold-line);
  box-shadow:0 1px 2px rgba(44,24,16,.04),0 8px 24px rgba(44,24,16,.05);
  color:var(--ink);
}
.msg.user .msg-bubble{
  border-radius:16px 4px 16px 16px;
  background:linear-gradient(140deg,var(--red-primary),var(--red-dark));
  border:1px solid var(--bubble-user-border);
  color:#fff;box-shadow:0 2px 4px rgba(139,0,0,.18),0 10px 26px rgba(139,0,0,.22);
}
.msg-bubble p{margin-bottom:9px}
.msg-bubble > :last-child{margin-bottom:0}
.msg-bubble strong{color:var(--red-dark);font-weight:600;letter-spacing:.02em}
.msg.user .msg-bubble strong{color:var(--gold-light)}
.msg-bubble em{font-style:italic;color:var(--ink-2)}
.msg-bubble .sub-head{
  font-family:var(--font-display);font-size:1rem;font-weight:700;
  letter-spacing:.06em;color:var(--ink);
  margin:14px 0 8px;padding-left:11px;position:relative;line-height:1.6;
}
.msg-bubble .sub-head:first-child{margin-top:2px}
.msg-bubble .sub-head::before{
  content:"";position:absolute;left:0;top:.42em;bottom:.42em;width:3px;
  background:linear-gradient(180deg,var(--red-primary),var(--gold));border-radius:2px;
}
.msg-bubble ul,.msg-bubble ol{padding-left:22px;margin:10px 0}
.msg-bubble li{margin-bottom:6px;line-height:1.8}
.msg-bubble ul li{list-style-type:square}
.msg-bubble ol li{list-style-type:decimal}
.msg-bubble ul li::marker{color:var(--gold);font-size:.7em}
.msg-bubble ol li::marker{color:var(--red-primary);font-weight:600;font-size:.86em}
.msg-bubble a{color:var(--red-dark);text-decoration:underline;text-underline-offset:2px}
.msg-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  margin-top:6px;width:100%;
}
.msg.user .msg-foot{justify-content:flex-end}
.msg-time{
  font-size:.6rem;color:var(--ink-3);
  font-variant-numeric:tabular-nums;letter-spacing:.06em;
}
.msg-actions{
  display:flex;gap:6px;
  opacity:0;pointer-events:none;transition:opacity .2s ease;
}
.msg:hover .msg-actions,.msg:focus-within .msg-actions{opacity:1;pointer-events:auto}
@media(hover:none){
  .msg.ai .msg-actions{opacity:.6;pointer-events:auto}
}
.msg-act{
  font-size:.6rem;letter-spacing:.1em;padding:2px 10px;border-radius:11px;
  background:var(--surface-2);border:1px solid var(--hairline);
  color:var(--ink-3);cursor:pointer;font-family:inherit;
  transition:color .18s,border-color .18s,background .18s;
}
.msg-act:hover{color:var(--red-dark);border-color:rgba(196,30,36,.3);background:rgba(196,30,36,.07)}
.msg-act.failed{color:#c2410c;border-color:rgba(194,65,12,.3)}

.msg-source{
  display:inline-flex;align-items:center;gap:5px;
  font-size:.6rem;padding:3px 9px;border-radius:20px;
  margin-top:11px;letter-spacing:.04em;
}
.msg-source::before{content:"";width:5px;height:5px;border-radius:50%;background:currentColor;opacity:.8}
.msg-source.knowledge{background:rgba(34,160,107,.09);color:#176845;border:1px solid rgba(34,160,107,.22)}
.msg-source.ai{background:rgba(196,30,36,.06);color:var(--red-dark);border:1px solid rgba(196,30,36,.14)}
/* 第三方知识库来源：与本地（石绿）、AI（朱红）区分开的石青 */
.msg-source.ext{background:rgba(47,108,148,.09);color:#2c6484;border:1px solid rgba(47,108,148,.2)}
.source-notice a{color:#2c6484;text-decoration:none;border-bottom:1px dashed rgba(47,108,148,.4)}
.source-notice a:hover{border-bottom-style:solid}

.source-notice{
  font-size:.72rem;color:var(--ink-2);
  padding:7px 11px;margin-bottom:11px;
  background:var(--surface-2);border-left:2px solid var(--gold);
  border-radius:0 var(--r-sm) var(--r-sm) 0;line-height:1.6;
}

.typing-indicator{display:flex;gap:5px;align-items:center;padding:3px 0}
.typing-indicator span{
  width:6px;height:6px;border-radius:50%;background:var(--red-primary);opacity:.55;
  animation:typing-bounce .68s ease-in-out infinite;
}
.typing-indicator span:nth-child(2){animation-delay:.14s}
.typing-indicator span:nth-child(3){animation-delay:.28s}
.typing-indicator em{
  font-style:normal;font-size:.66rem;color:var(--ink-3);
  letter-spacing:.1em;margin-left:5px;
}
@keyframes typing-bounce{0%,100%{transform:translateY(0);opacity:.35}50%{transform:translateY(-5px);opacity:1}}

/* ══════════ 首屏 Hero ══════════ */
.welcome{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:26px 18px;text-align:center;flex:1;
}
.hero{width:100%;max-width:720px}
.hero>*{animation:hero-in .55s cubic-bezier(.22,.68,.34,1) both}
.hero>*:nth-child(1){animation-delay:.03s}
.hero>*:nth-child(2){animation-delay:.09s}
.hero>*:nth-child(3){animation-delay:.15s}
.hero>*:nth-child(4){animation-delay:.21s}
.hero>*:nth-child(5){animation-delay:.27s}
.hero>*:nth-child(6){animation-delay:.33s}
.hero>*:nth-child(7){animation-delay:.39s}
.hero>*:nth-child(8){animation-delay:.45s}
.hero-divider{
  position:relative;height:1px;width:132px;margin:2px auto 22px;
  background:linear-gradient(90deg,transparent,var(--gold-line) 45%,var(--gold-line) 55%,transparent);
}
.hero-divider i{
  position:absolute;left:50%;top:50%;width:6px;height:6px;
  transform:translate(-50%,-50%) rotate(45deg);
  background:var(--red-primary);opacity:.75;
}
@keyframes hero-in{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}
.hero-mark{
  position:relative;
  width:72px;height:72px;border-radius:50%;margin:0 auto 20px;
  background:var(--seal-fill);
  border:1px solid var(--gold-line);
  box-shadow:var(--mark-halo),0 10px 30px var(--seal-glow);
  display:flex;align-items:center;justify-content:center;
  font-size:32px;color:var(--seal-ink);
  animation:mark-breathe 5s ease-in-out infinite;
}
@keyframes mark-breathe{
  0%,100%{box-shadow:var(--mark-halo),0 10px 30px var(--seal-glow)}
  50%{box-shadow:var(--mark-halo),0 14px 38px var(--seal-glow)}
}
.hero-kicker{font-size:.64rem;color:var(--gold);letter-spacing:.34em;margin-bottom:12px}
.hero-title{
  font-family:var(--font-display);
  font-size:1.65rem;font-weight:600;line-height:1.45;letter-spacing:.08em;
  color:var(--ink);margin-bottom:12px;
}
.hero-lede{
  color:var(--ink-2);font-size:.82rem;line-height:2;letter-spacing:.02em;
  max-width:560px;margin:0 auto 20px;
}
.cap-chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:26px}
.cap-chip{
  font-size:.68rem;letter-spacing:.12em;color:var(--gold);
  padding:5px 13px;border-radius:20px;
  border:1px solid var(--gold-line);background:var(--surface-2);
}
.faq-head{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.faq-rule{flex:1;height:1px;background:linear-gradient(90deg,transparent,var(--hairline),transparent)}
.faq-head-label{font-size:.66rem;letter-spacing:.28em;color:var(--ink-3)}
.faq-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(228px,1fr));gap:10px;text-align:left}
.faq-card{
  display:flex;flex-direction:column;gap:4px;align-items:flex-start;
  padding:14px 15px;border-radius:var(--r-md);cursor:pointer;
  background:var(--surface-3);border:1px solid var(--hairline);
  font-family:inherit;color:var(--ink);
  transition:transform .22s cubic-bezier(.22,.68,.34,1),box-shadow .22s,border-color .22s,background .22s;
  position:relative;overflow:hidden;
}
.faq-card::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:2px;
  background:linear-gradient(180deg,var(--red-primary),var(--gold));border-radius:2px;
  transform:scaleY(0);transform-origin:center;transition:transform .24s ease;
}
.faq-card:hover{
  transform:translateY(-2px);box-shadow:var(--shadow-pop);
  border-color:rgba(196,30,36,.24);background:var(--surface);
}
.faq-card:hover::before{transform:scaleY(1)}
.faq-label{font-size:.82rem;font-weight:600;letter-spacing:.04em}
.faq-desc{font-size:.66rem;color:var(--ink-3);letter-spacing:.03em;line-height:1.6}
.faq-arrow{
  position:absolute;right:14px;top:50%;transform:translate(-4px,-50%);
  font-size:.78rem;color:var(--red-primary);opacity:0;transition:all .24s;
}
.faq-card:hover .faq-arrow{opacity:1;transform:translate(0,-50%)}

/* ══════════ 快捷查询 ══════════ */
.quick-replies{
  padding:8px 16px;display:flex;gap:8px;flex-wrap:nowrap;align-items:center;
  overflow-x:auto;-webkit-overflow-scrolling:touch;flex-shrink:0;
  border-top:1px solid var(--hairline);background:var(--bar-bg);
  scrollbar-width:none;
  -webkit-mask-image:linear-gradient(90deg,transparent 0,#000 14px,#000 calc(100% - 18px),transparent 100%);
  mask-image:linear-gradient(90deg,transparent 0,#000 14px,#000 calc(100% - 18px),transparent 100%);
}
.quick-replies::-webkit-scrollbar{display:none}
.quick-label{
  flex-shrink:0;font-size:.6rem;letter-spacing:.18em;color:var(--gold);
  padding-right:8px;border-right:1px solid var(--hairline);margin-right:2px;
  display:flex;align-items:center;gap:6px;
}
.quick-label::before{
  content:"";width:5px;height:5px;border-radius:50%;
  background:var(--gold);opacity:.8;flex-shrink:0;
}
.quick-btn{
  padding:6px 14px;border-radius:20px;flex-shrink:0;
  background:var(--surface-2);border:1px solid var(--hairline);
  color:var(--ink-2);font-size:.72rem;font-family:inherit;letter-spacing:.04em;
  cursor:pointer;transition:all .2s;white-space:nowrap;
}
.quick-btn:hover{
  background:rgba(196,30,36,.07);border-color:rgba(196,30,36,.26);
  color:var(--red-dark);transform:translateY(-1px);
}

/* ══════════ 输入区 ══════════ */
.input-area{
  position:relative;
  padding:12px 16px 6px;flex-shrink:0;
  border-top:1px solid var(--hairline-2);background:var(--bar-bg);
  padding-bottom:calc(10px + var(--safe-bottom));
}
.input-area::before{
  content:"";position:absolute;left:20px;right:20px;top:0;height:1px;
  background:linear-gradient(90deg,transparent,var(--gold-line),transparent);
}
.composer{display:flex;gap:10px;align-items:flex-end}
.input-wrapper{
  flex:1;position:relative;min-width:0;
  background:var(--composer-bg);border:1px solid var(--hairline);
  border-radius:var(--r-md);transition:border-color .22s,box-shadow .22s;
}
.input-wrapper:focus-within{
  border-color:rgba(196,30,36,.42);
  box-shadow:0 0 0 3px rgba(196,30,36,.07),0 4px 14px rgba(44,24,16,.05);
}
.input-wrapper textarea{
  width:100%;padding:12px 16px;
  background:transparent;border:none;outline:none;
  color:var(--ink);font-size:.86rem;font-family:inherit;line-height:1.6;
  resize:none;max-height:100px;letter-spacing:.02em;
}
.input-wrapper textarea::placeholder{color:var(--ink-3);letter-spacing:.04em}
.send-btn{
  position:relative;
  width:44px;height:44px;border-radius:50%;flex-shrink:0;
  background:var(--send-fill);
  border:1px solid var(--send-line);color:var(--send-ink);
  cursor:pointer;font-size:1.05rem;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--send-shadow);
  transition:transform .22s cubic-bezier(.22,.68,.34,1),box-shadow .22s,background .25s,color .25s,border-color .25s;
}
.send-btn::before{
  content:"";position:absolute;inset:4px;border-radius:50%;
  border:1px solid var(--send-ring);pointer-events:none;
  transition:border-color .25s;
}
.send-btn:hover{
  transform:translateY(-2px) scale(1.03);
  background:var(--send-hover-fill);
  box-shadow:var(--send-hover-shadow);
}
.send-btn:active{transform:translateY(0) scale(.96)}
.send-btn.ready{
  color:#fff8ef;
  background:linear-gradient(140deg,var(--red-light),var(--red-primary) 55%,var(--red-dark));
  border-color:var(--gold);
  box-shadow:var(--send-ready-shadow);
}
.send-btn.ready::before{border-color:var(--send-ready-ring)}
.send-btn.disabled{opacity:.45;pointer-events:none;transform:none;box-shadow:none}
.composer-meta{
  display:flex;justify-content:space-between;align-items:center;
  padding:7px 4px 0;font-size:.62rem;color:var(--ink-3);letter-spacing:.08em;
}
.char-count{font-variant-numeric:tabular-nums;transition:color .2s}
.char-count.near-limit{color:var(--red-light);font-weight:600}

/* ══════════ 悬浮按钮 / 抽屉 ══════════ */
.scroll-bottom-btn{
  position:absolute;right:16px;bottom:112px;z-index:5;
  width:38px;height:38px;border-radius:50%;
  background:var(--send-fill);
  border:1px solid var(--send-line);color:var(--send-ink);
  font-size:.95rem;line-height:1;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--send-shadow);
  opacity:0;transform:translateY(10px) scale(.85);pointer-events:none;
  transition:opacity .25s,transform .25s,background .25s,color .25s;
}
.scroll-bottom-btn.show{opacity:1;transform:translateY(0) scale(1);pointer-events:auto}
.scroll-bottom-btn:hover{transform:translateY(-2px) scale(1.05);background:var(--send-hover-fill)}
.scroll-bottom-btn:active{transform:scale(.92)}
.drawer-head{
  display:none;align-items:center;justify-content:space-between;gap:10px;
  padding:0 2px 11px;margin:-2px 0 2px;
  border-bottom:1px solid var(--hairline);position:relative;
}
.drawer-head::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;
  background:linear-gradient(90deg,var(--gold-line),transparent 60%);
}
.drawer-title{
  font-family:var(--font-display);font-size:.82rem;font-weight:600;
  letter-spacing:.2em;color:var(--ink-2);
}
.drawer-close{
  display:none;align-self:center;
  width:34px;height:34px;border-radius:var(--r-sm);
  background:var(--surface-2);border:1px solid var(--hairline);
  color:var(--ink-2);font-size:.85rem;cursor:pointer;
  align-items:center;justify-content:center;flex-shrink:0;
}
.sidebar-overlay{
  display:none;position:fixed;inset:0;z-index:99;
  background:var(--overlay);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}

/* ══════════ 主题切换器 ══════════ */
.theme-switcher{
  display:flex;gap:5px;align-items:center;padding:4px;border-radius:22px;
  background:var(--surface-2);border:1px solid var(--hairline);
}
.theme-dot{
  width:20px;height:20px;border-radius:50%;border:1px solid var(--hairline);
  cursor:pointer;transition:all .2s;position:relative;
  display:flex;align-items:center;justify-content:center;
}
.theme-dot:hover{transform:scale(1.16)}
.theme-dot.active{border-color:var(--gold);box-shadow:0 0 0 2px rgba(160,115,22,.18)}
.theme-dot[data-theme="yuebai"]{background:linear-gradient(135deg,#f5f0eb,#fff)}
.theme-dot[data-theme="danxia"]{background:linear-gradient(135deg,#1a0a0a,#401010)}
.theme-dot[data-theme="chihong"]{background:linear-gradient(135deg,#8b0000,#d42a2a)}
.theme-dot::after{
  content:attr(data-name);position:absolute;bottom:-21px;left:50%;transform:translateX(-50%);
  font-size:.55rem;color:var(--ink-3);white-space:nowrap;letter-spacing:.08em;
  opacity:0;transition:opacity .2s;pointer-events:none;
}
.theme-dot:hover::after{opacity:1}

/* ══════════ 主题：丹霞（深色）══════════ */
body[data-theme="danxia"]{
  --gold:#d4a843;--gold-light:#f0d68a;--red-light:#e8434a;
  --dot:#4ade80;--dot-ring:rgba(74,222,128,.2);
  --focus-ring:rgba(212,168,67,.6);--sel:rgba(212,168,67,.26);
  --bg:#1a0a0a;--bg-deep:#120707;
  --surface:rgba(32,12,12,.82);
  --surface-2:rgba(255,255,255,.06);
  --surface-3:rgba(255,255,255,.04);
  --ink:#f6efe6;--ink-2:rgba(246,239,230,.74);--ink-3:rgba(246,239,230,.44);
  --hairline:rgba(255,255,255,.1);--hairline-2:rgba(255,255,255,.05);
  --gold-line:rgba(212,168,67,.4);
  --header-bg:linear-gradient(135deg,rgba(196,30,36,.24),rgba(139,0,0,.32));
  --bubble-ai:rgba(255,255,255,.06);
  --bubble-ai-border:rgba(255,255,255,.1);
  --bubble-user-border:rgba(212,168,67,.32);
  --composer-bg:rgba(255,255,255,.05);
  --bar-bg:rgba(0,0,0,.26);
  --shadow-card:0 1px 0 rgba(255,255,255,.05) inset,0 16px 40px rgba(0,0,0,.34);
  --shadow-pop:0 18px 46px rgba(0,0,0,.5);
  --scroll-thumb:rgba(255,255,255,.14);
  --particle:rgba(212,168,67,.22);
  --overlay:rgba(0,0,0,.55);
  --sidebar-bg:linear-gradient(160deg,#240b0b,var(--bg) 45%);

  --seal-fill:linear-gradient(140deg,var(--gold),#b98a2c);
  --seal-ink:#3a1010;
  --seal-ring:rgba(58,16,16,.2);
  --seal-halo:0 0 0 3px rgba(255,255,255,.08);
  --seal-glow:rgba(212,168,67,.3);
  --mark-halo:0 0 0 6px rgba(212,168,67,.08),0 0 0 12px rgba(212,168,67,.04);
  --orbit-a:rgba(212,168,67,.8);
  --orbit-b:rgba(212,168,67,.34);
  --orbit-halo:rgba(212,168,67,.14);

  --send-fill:linear-gradient(140deg,var(--red-primary),var(--red-dark));
  --send-ink:#fff8ef;
  --send-line:rgba(212,168,67,.4);
  --send-ring:rgba(255,240,215,.3);
  --send-shadow:0 4px 16px rgba(0,0,0,.4);
  --send-hover-fill:linear-gradient(140deg,var(--red-light),var(--red-primary) 70%);
  --send-hover-shadow:0 8px 24px rgba(0,0,0,.5);
  --send-ready-shadow:0 0 0 3px var(--sel),0 6px 20px rgba(0,0,0,.5);
}
body[data-theme="danxia"] .bg-pattern{
  background:
    radial-gradient(ellipse 90% 60% at 50% -8%,rgba(196,30,36,.4),transparent 62%),
    radial-gradient(ellipse 70% 50% at 88% 104%,rgba(212,168,67,.14),transparent 58%),
    radial-gradient(ellipse 55% 45% at 6% 88%,rgba(139,0,0,.34),transparent 55%),
    linear-gradient(180deg,var(--bg),var(--bg-deep));
}
body[data-theme="danxia"] .stat-num{color:var(--gold-light)}
body[data-theme="danxia"] .msg-bubble strong,
body[data-theme="danxia"] .msg-bubble a{color:var(--gold-light)}
body[data-theme="danxia"] .msg-source.ai{background:rgba(212,168,67,.12);color:var(--gold-light);border-color:rgba(212,168,67,.24)}
body[data-theme="danxia"] .msg-source.knowledge{background:rgba(74,222,128,.12);color:#5cd39a;border-color:rgba(74,222,128,.22)}
body[data-theme="danxia"] .msg-source.ext{background:rgba(96,178,222,.13);color:#7cc4e8;border-color:rgba(96,178,222,.26)}
body[data-theme="danxia"] .source-notice a{color:#7cc4e8;border-bottom-color:rgba(96,178,222,.45)}
body[data-theme="danxia"] .topic-btn:hover,
body[data-theme="danxia"] .quick-btn:hover{color:#fff}
body[data-theme="danxia"] .topic-btn:hover .topic-arrow{color:var(--gold-light)}
body[data-theme="danxia"] .quick-btn:hover{border-color:rgba(212,168,67,.4);background:rgba(212,168,67,.12)}
body[data-theme="danxia"] .header-action-btn:hover{background:rgba(212,168,67,.16);border-color:rgba(212,168,67,.34);color:var(--gold-light)}
body[data-theme="danxia"] .faq-card{background:rgba(255,255,255,.04)}
body[data-theme="danxia"] .faq-card:hover{background:rgba(255,255,255,.07);border-color:rgba(212,168,67,.3)}
body[data-theme="danxia"] .cap-chip{color:var(--gold-light)}
body[data-theme="danxia"] .faq-card::before{background:var(--gold)}

/* ══════════ 主题：赤焰（暖红）══════════ */
body[data-theme="chihong"]{
  --red-primary:#d42a2a;--red-dark:#a01010;--red-light:#f05050;
  --gold:#e8b84a;--gold-light:#f5dc90;
  --dot:#4ade80;--dot-ring:rgba(74,222,128,.2);
  --focus-ring:rgba(232,184,74,.62);--sel:rgba(232,184,74,.28);
  --bg:#1c0808;--bg-deep:#130505;
  --surface:rgba(48,14,14,.86);
  --surface-2:rgba(255,255,255,.07);
  --surface-3:rgba(255,255,255,.05);
  --ink:#fdf3e6;--ink-2:rgba(253,243,230,.78);--ink-3:rgba(253,243,230,.46);
  --hairline:rgba(232,184,74,.16);--hairline-2:rgba(232,184,74,.08);
  --gold-line:rgba(232,184,74,.42);
  --header-bg:linear-gradient(135deg,rgba(212,42,42,.5),rgba(120,12,12,.6));
  --bubble-ai:rgba(255,255,255,.08);
  --bubble-ai-border:rgba(232,184,74,.16);
  --bubble-user-border:rgba(232,184,74,.4);
  --composer-bg:rgba(255,255,255,.07);
  --bar-bg:rgba(0,0,0,.28);
  --shadow-card:0 1px 0 rgba(255,255,255,.06) inset,0 16px 40px rgba(0,0,0,.38);
  --shadow-pop:0 18px 46px rgba(0,0,0,.52);
  --scroll-thumb:rgba(232,184,74,.26);
  --particle:rgba(232,184,74,.26);
  --overlay:rgba(12,4,4,.6);
  --sidebar-bg:linear-gradient(160deg,#33100f,var(--bg) 45%);

  --seal-fill:linear-gradient(140deg,var(--red-light),var(--red-primary) 55%,var(--red-dark));
  --seal-ink:#ffe3ae;
  --seal-ring:rgba(255,232,190,.3);
  --seal-halo:0 0 0 3px rgba(255,255,255,.1);
  --seal-glow:rgba(212,42,42,.36);
  --mark-halo:0 0 0 6px rgba(232,184,74,.1),0 0 0 12px rgba(232,184,74,.05);
  --orbit-a:rgba(232,184,74,.85);
  --orbit-b:rgba(255,138,120,.45);
  --orbit-halo:rgba(232,184,74,.16);

  --send-fill:linear-gradient(140deg,var(--red-primary),var(--red-dark));
  --send-ink:#fff8ef;
  --send-line:rgba(232,184,74,.44);
  --send-ring:rgba(255,240,215,.32);
  --send-shadow:0 4px 16px rgba(0,0,0,.42);
  --send-hover-fill:linear-gradient(140deg,var(--red-light),var(--red-primary) 70%);
  --send-hover-shadow:0 8px 24px rgba(0,0,0,.52);
  --send-ready-shadow:0 0 0 3px var(--sel),0 6px 20px rgba(0,0,0,.52);
}
body[data-theme="chihong"] .bg-pattern{
  background:
    radial-gradient(ellipse 90% 60% at 50% -8%,rgba(212,42,42,.44),transparent 62%),
    radial-gradient(ellipse 70% 50% at 88% 104%,rgba(232,184,74,.16),transparent 58%),
    radial-gradient(ellipse 55% 45% at 6% 88%,rgba(160,16,16,.34),transparent 55%),
    linear-gradient(180deg,var(--bg),var(--bg-deep));
}
body[data-theme="chihong"] .stat-num{color:var(--gold-light)}
body[data-theme="chihong"] .msg-bubble strong,
body[data-theme="chihong"] .msg-bubble a{color:var(--gold-light)}
body[data-theme="chihong"] .msg-source.ai{background:rgba(232,184,74,.14);color:var(--gold-light);border-color:rgba(232,184,74,.26)}
/* 赤焰是暖红高饱和底，浅色主题里的石绿/石青压上去直接糊掉，
   与丹霞同一套处理：亮度提上来，语义色相保持不变。 */
body[data-theme="chihong"] .msg-source.knowledge{background:rgba(74,222,128,.14);color:#5cd39a;border-color:rgba(74,222,128,.24)}
body[data-theme="chihong"] .msg-source.ext{background:rgba(96,178,222,.14);color:#7cc4e8;border-color:rgba(96,178,222,.26)}
body[data-theme="chihong"] .source-notice a{color:#7cc4e8;border-bottom-color:rgba(96,178,222,.45)}
body[data-theme="chihong"] .send-btn{color:#fff}

/* ══════════ 响应式 ══════════ */
@media(max-width:1080px){
  .faq-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
}
@media(max-width:900px){
  .sidebar{
    position:fixed;left:0;top:0;bottom:0;z-index:120;
    width:min(306px,86vw);padding:16px;padding-top:calc(14px + var(--safe-top));
    padding-bottom:calc(18px + var(--safe-bottom));
    background:var(--sidebar-bg);
    border-right:1px solid var(--gold-line);
    box-shadow:14px 0 44px rgba(20,10,6,.28);
    transform:translateX(-102%);
    overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;
    visibility:hidden;transition:transform .34s cubic-bezier(.32,.72,.24,1),visibility 0s .34s;
  }
  .sidebar.open{transform:translateX(0);visibility:visible;transition:transform .34s cubic-bezier(.32,.72,.24,1),visibility 0s 0s}
  .sidebar-overlay.open{display:block;animation:overlay-in .25s ease-out}
  @keyframes overlay-in{from{opacity:0}to{opacity:1}}
  .drawer-head{display:flex}
  .drawer-close{display:flex}
  .mobile-menu-btn{display:flex;width:36px;height:36px;font-size:1.05rem}
  .header-action-btn{width:36px;height:36px;font-size:.95rem}
  /* 抽屉里的小卡片按整屏阅读节奏重排：数据卡更紧凑，专题列表行距加大 */
  .sidebar .side-card{padding:15px 14px}
  .sidebar .stat-item{padding:12px 6px}
  .sidebar .topic-btn{padding:12px}
  .side-note{margin-top:2px;line-height:2}
  .app{padding:10px;padding-top:calc(10px + var(--safe-top))}
  .header{padding:11px 16px;border-radius:var(--r-md)}
  .header-title h1{font-size:1.1rem}
  .emblem{width:38px;height:38px;font-size:18px}
  .clock-date{display:none}
  .main{margin-top:10px;gap:0}
  .messages{padding:18px 16px}
  .chat-header{padding:11px 14px}
}
@media(max-width:560px){
  .faq-grid{grid-template-columns:1fr}
  .hero-title{font-size:1.3rem}
  .hero-lede{font-size:.84rem;line-height:1.95}
  .cap-chips{gap:6px;margin-bottom:20px}
  .msg{max-width:92%}
  /* 输入框字号不低于 16px：安卓浏览器会对着更小的输入框自动放大页面，
     一打字整屏就跳，观感直接垮掉。 */
  .input-wrapper textarea{font-size:1rem}
  /* 手机上让背景静下来：三块毛玻璃 + 常驻粒子在低端安卓上是滚动掉帧的主因，
     而这里的背景本就是柔和渐变，去掉模糊几乎看不出差别，跟手度却是实打实的提升。 */
  .header,.chat-area,.side-card{backdrop-filter:none;-webkit-backdrop-filter:none}
  .bg-particles{display:none}
}
@media(max-width:480px){
  .app{padding:7px;padding-top:calc(7px + var(--safe-top))}
  .header{padding:9px 12px;gap:8px}
  .header-left{gap:10px}
  .header-title h1{font-size:1.04rem;letter-spacing:.05em}
  .brand-kicker{font-size:.62rem}
  .header-title p{display:none}
  .emblem{width:34px;height:34px;font-size:16px}
  /* 顶栏右侧按"品牌优先"取舍：时钟与状态徽章都是装饰件，窄屏先让位，
     保证平台名不被截成省略号（标题截断比少一个时钟更掉档次），
     在线状态由聊天抬头的呼吸圆点继续表达。 */
  .clock-wrap{display:none}
  .status-badge{display:none}
  .theme-switcher{padding:3px;gap:3px;border-radius:18px}
  .theme-dot{width:18px;height:18px}
  .main{margin-top:7px}
  .chat-header{padding:9px 12px}
  .chat-header-rule{height:22px}
  .chat-header-info h4{font-size:.86rem}
  .chat-header-info span{display:none}
  .header-action-btn{width:33px;height:33px;font-size:.85rem}
  .mobile-menu-btn{width:33px;height:33px;font-size:.98rem}
  .messages{padding:15px 12px;gap:16px}
  .msg{gap:8px}
  .msg-avatar{width:30px;height:30px;font-size:14px}
  /* 小屏头像与气泡只隔 8px，光环同步收窄，否则弧环会贴到气泡边 */
  .msg.ai .msg-avatar::before{inset:-3px;border-width:1.2px}
  .msg-bubble{font-size:.92rem;padding:12px 14px;line-height:1.85}
  /* 辅助文字的手机端下限：正文抬上去之后，时间戳、来源徽章、这些
     10px 上下的说明行也得跟着提，否则"正文清楚、说明发虚"，
     版式一下就露出成本。统一抬到 10.5–11px，层级仍靠字重与色阶拉开。 */
  .msg-name,.msg-time,.msg-act{font-size:.66rem}
  .msg-source{font-size:.66rem;padding:4px 10px}
  .source-notice{font-size:.76rem}
  .stat-label{font-size:.64rem}
  .cap-chip{font-size:.72rem;padding:6px 13px}
  .side-card h3,.topic-btn{font-size:.8rem}
  .side-note{font-size:.7rem}
  .welcome{padding:20px 12px}
  .hero-mark{width:60px;height:60px;font-size:26px;margin-bottom:16px}
  .hero-mark::before{inset:-6px}
  .hero-kicker{letter-spacing:.24em;font-size:.64rem}
  .faq-card{padding:12px 13px}
  .faq-grid{grid-template-columns:1fr 1fr;gap:8px}
  .faq-label{font-size:.84rem}
  .faq-desc{font-size:.66rem;line-height:1.5;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
  .quick-replies{padding:7px 10px}
  .quick-label{font-size:.6rem;padding-right:7px}
  .quick-btn{padding:7px 13px;font-size:.76rem}
  .input-area{padding:10px 10px 4px}
  .input-wrapper textarea{padding:11px 14px}
  .send-btn{width:44px;height:44px}
  .composer-meta{padding:6px 2px 0;font-size:.64rem}
  .scroll-bottom-btn{right:12px;bottom:104px;width:35px;height:35px}
}
@media(max-width:360px){
  /* 让出品牌名后仍有空间，标题字号回抬半档：小屏不等于缩小身份 */
  .header-title h1{font-size:.96rem}
  .brand-kicker{display:none}
  .emblem{width:31px;height:31px;font-size:15px}
  .theme-dot{width:16px;height:16px}
  .hero-title{font-size:1.16rem}
  .faq-desc{display:none}
  .faq-grid{gap:7px}
}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .bg-particles{display:none}
}