/* ===== 府前社区 · 民生政策咨询（清爽落地页H5）===== */
:root{
  --primary:#2563c8; --primary-dark:#1c4f9e; --primary-light:#e8f0fc;
  --bg:#f5f8fd; --card:#fff; --text:#1f2a37; --muted:#7a8794; --line:#eaeef4;
  --user-bubble:#2563c8; --ok:#2e9e6b; --warn:#e8893a;
  --radius:20px; --shadow:0 10px 40px rgba(37,99,200,.10);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
html,body{height:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  background:linear-gradient(180deg,#eef4ff 0%,#f5f8fd 38%,#f7f9fc 100%);
  color:var(--text);line-height:1.6;font-size:15px;
}
a{color:inherit;text-decoration:none}

/* ---- 顶部导航 ---- */
.nav{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:1120px;margin:0 auto;padding:14px 22px;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px}
.brand-badge{width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,#2563c8,#3a7bd5);color:#fff;display:flex;align-items:center;justify-content:center;font-size:15px;letter-spacing:1px}
.nav-links{display:flex;gap:26px;margin-left:12px;font-size:14.5px;color:#4b5563}
.nav-links a:hover{color:var(--primary)}
.nav-cta{margin-left:auto;background:var(--primary);color:#fff;padding:9px 20px;border-radius:22px;font-size:14px;transition:.15s}
.nav-cta:hover{background:var(--primary-dark)}

/* ---- 首屏 ---- */
.hero{max-width:1120px;margin:0 auto;padding:56px 22px 40px;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.hero-title{font-size:46px;font-weight:800;line-height:1.25;letter-spacing:1px;color:#16202e}
.hero-sub{margin-top:18px;font-size:16px;color:var(--primary);font-weight:600}
.hero-desc{margin-top:12px;font-size:15px;color:var(--muted);max-width:420px}
.hero-actions{margin-top:28px;display:flex;gap:14px;flex-wrap:wrap}
.btn-primary-lg{background:var(--primary);color:#fff;padding:13px 28px;border-radius:26px;font-size:15px;box-shadow:0 8px 20px rgba(37,99,200,.25);transition:.15s}
.btn-primary-lg:hover{background:var(--primary-dark)}
.btn-ghost-lg{background:#fff;color:var(--text);padding:13px 28px;border-radius:26px;font-size:15px;border:1px solid var(--line);transition:.15s}
.btn-ghost-lg:hover{border-color:var(--primary);color:var(--primary)}

/* ---- 聊天卡片 ---- */
.chat-card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);display:flex;flex-direction:column;overflow:hidden}
.chat-head{padding:16px 18px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:9px;font-weight:600;font-size:15px;flex-wrap:wrap}
.dot{width:8px;height:8px;border-radius:50%;background:var(--ok);display:inline-block}
.online{font-size:12px;color:var(--ok);font-weight:500}
.head-note{font-weight:400;color:var(--muted);font-size:12.5px;margin-left:2px}
.voice-switch{margin-left:auto;display:flex;align-items:center;gap:6px;font-size:12.5px;color:var(--muted);cursor:pointer;user-select:none}
.switch input{display:none}
.switch .track{width:36px;height:19px;border-radius:19px;background:#d5dce6;position:relative;transition:.2s}
.switch .track::after{content:'';position:absolute;top:2px;left:2px;width:15px;height:15px;border-radius:50%;background:#fff;transition:.2s}
.switch input:checked + .track{background:var(--primary)}
.switch input:checked + .track::after{left:19px}

.chat-body{height:54vh;min-height:320px;overflow-y:auto;padding:18px;display:flex;flex-direction:column;gap:14px;background:#fbfcfe}
.msg{display:flex;gap:10px;max-width:88%}
.msg .avatar{width:34px;height:34px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:16px}
.msg.user{align-self:flex-end;flex-direction:row-reverse}
.msg.user .avatar{background:var(--user-bubble)}
.msg.ai .avatar{background:#e8f0fc;color:#2563c8;font-size:18px}
.bubble{padding:11px 14px;border-radius:14px;white-space:pre-wrap;word-break:break-word;font-size:14.5px}
.msg.user .bubble{background:var(--user-bubble);color:#fff;border-top-right-radius:4px}
.msg.ai .bubble{background:#fff;border:1px solid var(--line);border-top-left-radius:4px}
.msg .meta{font-size:11px;color:var(--muted);margin-top:4px;display:flex;align-items:center;gap:8px}
.read-btn{border:1px solid #d6e4f8;background:var(--primary-light);color:var(--primary);font-size:11px;padding:2px 9px;border-radius:12px;cursor:pointer;font-family:inherit;transition:.15s}
.read-btn:hover{background:var(--primary);color:#fff;border-color:var(--primary)}
.msg.agent .bubble{background:#fff7ec;border-color:#f3d9b8}
.tag{display:inline-block;font-size:11px;padding:1px 8px;border-radius:10px;background:var(--primary-light);color:var(--primary);margin-right:6px}
.tag.human{background:#fdeee0;color:var(--warn)}
.typing{color:var(--muted);font-size:14px}
.typing span{display:inline-block;animation:blink 1.2s infinite}
.typing span:nth-child(2){animation-delay:.2s}.typing span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,100%{opacity:.2}50%{opacity:1}}

/* 快捷问题 */
.quick{padding:10px 16px;display:flex;gap:8px;overflow-x:auto;white-space:nowrap;background:#fbfcfe;border-top:1px solid var(--line)}
.chip{font-size:13px;padding:6px 13px;border-radius:20px;background:var(--primary-light);color:var(--primary);cursor:pointer;flex-shrink:0;transition:.15s}
.chip:hover{background:var(--primary);color:#fff}

/* 输入区 */
.chat-input{padding:12px 14px;display:flex;gap:10px;align-items:flex-end;background:#fff;border-top:1px solid var(--line)}
.chat-input textarea{flex:1;resize:none;border:1px solid var(--line);border-radius:16px;padding:14px 16px;font-size:16px;line-height:1.6;font-family:inherit;min-height:58px;max-height:180px;outline:none;background:#f7f9fc}
.chat-input textarea:focus{border-color:var(--primary);background:#fff}
.btn{border:none;border-radius:14px;padding:11px 16px;font-size:14px;cursor:pointer;white-space:nowrap;transition:.15s;font-family:inherit}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-ghost{background:#eef2f7;color:var(--text)}
a.btn.link-btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none}
a.btn.link-btn:hover{background:#e2e8f0}
.btn.mic{width:44px;height:44px;padding:0;border-radius:50%;font-size:19px;background:#eef2f7}
.btn.mic.rec{background:#e5564b;color:#fff;animation:pulse 1s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(229,86,75,.4)}50%{box-shadow:0 0 0 8px rgba(229,86,75,0)}}

/* ---- 政策速查 ---- */
.policy-section{max-width:1120px;margin:10px auto 60px;padding:0 22px}
.policy-inner{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}
.policy-title{font-size:19px;font-weight:700;margin-bottom:14px}
.side-search{display:flex;gap:8px;margin-bottom:12px}
.side-search input{flex:1;border:1px solid var(--line);border-radius:12px;padding:9px 12px;font-size:14px;outline:none}
.side-search input:focus{border-color:var(--primary)}
.cats{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}
.cat{font-size:13px;padding:5px 13px;border-radius:18px;background:#eef2f7;cursor:pointer;color:var(--muted);transition:.15s}
.cat.active{background:var(--primary);color:#fff}
.policy-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:12px;max-height:60vh;overflow-y:auto}
.policy-item{padding:14px;border:1px solid var(--line);border-radius:14px;cursor:pointer;transition:.15s;background:#fff}
.policy-item:hover{border-color:var(--primary);box-shadow:0 6px 18px rgba(37,99,200,.08)}
.policy-item h4{font-size:14.5px;color:var(--text);margin-bottom:4px}
.policy-item p{font-size:13px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.policy-item .pc{font-size:11.5px;color:var(--primary);margin-top:6px}

/* 政策详情弹层 */
.mask{position:fixed;inset:0;background:rgba(20,35,55,.45);display:none;align-items:center;justify-content:center;z-index:50;padding:20px}
.mask.show{display:flex}
.modal{background:#fff;border-radius:18px;max-width:620px;width:100%;max-height:82vh;display:flex;flex-direction:column;overflow:hidden}
.modal-head{padding:18px 20px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}
.modal-head h3{font-size:17px}
.modal-close{cursor:pointer;font-size:22px;color:var(--muted);line-height:1}
.modal-body{padding:20px;overflow-y:auto;font-size:14.5px;white-space:pre-wrap}
.modal-body .src{margin-top:16px;font-size:12.5px;color:var(--muted);border-top:1px dashed var(--line);padding-top:12px}

.toast{position:fixed;left:50%;bottom:96px;transform:translateX(-50%);background:rgba(30,45,65,.92);color:#fff;padding:10px 18px;border-radius:10px;font-size:14px;z-index:99;display:none}

/* ---- 手机/窄屏 ---- */
@media (max-width:900px){
  .nav-links{display:none}
  /* 手机端取消左侧介绍块，打开即见对话框 */
  .hero-left{display:none}
  .hero{grid-template-columns:1fr;padding:14px 14px 10px;gap:0}
  .chat-body{height:52vh;min-height:260px}
  .quick{position:fixed;left:0;right:0;bottom:92px;z-index:9;background:#fff;padding:8px 14px;box-shadow:0 -1px 6px rgba(30,60,110,.06)}
  .chat-input{position:fixed;left:0;right:0;bottom:0;z-index:10;background:#fff;padding:10px 14px;box-shadow:0 -3px 14px rgba(30,60,110,.12)}
  .policy-section{margin-bottom:150px}
  .policy-list{grid-template-columns:1fr;max-height:none}
}