/* ========== 公共变量 ========== */
:root{
  --bg:#f6f8fc;
  --card:#fff;
  --line:#eef0f5;
  --line-2:#f4f6fa;
  --ink:#101322;
  --text:#363c4d;
  --text-2:#565d70;
  --muted:#8a92a6;
  --muted-lt:#b4bac7;
  --accent:#1e40af;
  --accent-2:#2563eb;
  --accent-soft:#eef4ff;
  --accent-grad:linear-gradient(135deg,#1e3a8a,#2563eb);

  --c-ai:#0e7490;   --c-ai-2:#22d3ee;
  --c-life:#047857; --c-life-2:#10b981;
  --c-baby:#b45309; --c-baby-2:#f59e0b;
  --c-food:#c2410c; --c-food-2:#fb923c;
  --c-work:#4338ca; --c-work-2:#818cf8;
  --c-tech:#1d4ed8; --c-tech-2:#3b82f6;

  --ease:cubic-bezier(.22,.61,.36,1);
  --t:.22s var(--ease);
  --t-fast:.16s var(--ease);
  --shadow-sm:0 1px 2px rgba(16,19,34,.03);
  --shadow-md:0 6px 18px -8px rgba(16,19,34,.08),0 1px 3px rgba(16,19,34,.04);
  --shadow-lg:0 20px 40px -18px rgba(16,19,34,.16);
}

/* ========== 全局重置 ========== */
*{margin:0;padding:0;box-sizing:border-box;}
body{
  font-family:system-ui,-apple-system,"SF Pro Text","Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);font-size:15.5px;line-height:1.75;
  -webkit-font-smoothing:antialiased;padding-bottom:0;
}
a{color:inherit;text-decoration:none;transition:color var(--t-fast);}
img{max-width:100%;display:block;}
ul{list-style:none;}
button{font-family:inherit;cursor:pointer;}
input{font-family:inherit;}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px;}

/* ========== 头部 ========== */
.header{
  position:relative;overflow:hidden;padding:26px 0;color:#fff;
  background:
    radial-gradient(900px 300px at 15% -60%, rgba(255,255,255,.28), transparent 60%),
    radial-gradient(700px 300px at 90% 130%, rgba(147,197,253,.45), transparent 60%),
    linear-gradient(120deg,#1e3a8a 0%,#2563eb 58%,#3b82f6 100%);
  isolation:isolate;
}
.header::before{
  content:"";position:absolute;inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.06) 1px,transparent 1px);
  background-size:32px 32px;
  mask-image:radial-gradient(600px 200px at 50% 0%,#000 20%,transparent 90%);
  -webkit-mask-image:radial-gradient(600px 200px at 50% 0%,#000 20%,transparent 90%);
  z-index:-1;opacity:.9;
}
.header::after{
  content:"";position:absolute;left:50%;top:-140px;transform:translateX(-50%);
  width:680px;height:320px;
  background:radial-gradient(closest-side,rgba(255,255,255,.28),transparent 70%);
  filter:blur(30px);z-index:-1;pointer-events:none;
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;}
.header-left{display:flex;align-items:center;gap:20px;min-width:0;flex-wrap:wrap;}

/* H1 品牌标题：重置默认标题样式，链接承载 flex 布局 */
.brand{
  margin:0;
  font-size:inherit;
  font-weight:inherit;
  line-height:inherit;
  flex-shrink:0;
}
.brand-link{
  display:flex;
  align-items:center;
  gap:14px;
  color:inherit;
  text-decoration:none;
}
.brand-mark{
  width:48px;height:48px;border-radius:14px;flex-shrink:0;
  display:grid;place-items:center;font-size:21px;font-weight:800;color:#fff;
  background:rgba(255,255,255,.18);border:1px solid rgba(255,255,255,.3);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.35);letter-spacing:-1px;
}
.logo-text{font-size:22px;font-weight:700;letter-spacing:-.4px;line-height:1.2;color:#fff;}
.site-branding{display:block;font-size:12.5px;font-weight:400;opacity:.85;line-height:1.5;letter-spacing:.2px;margin-top:2px;}
.header-slogan{
  position:relative;
  padding-left:20px;
  font-size:13.5px;
  color:rgba(255,255,255,.9);
  letter-spacing:.3px;
  line-height:1.5;
  white-space:nowrap;
}
.header-slogan::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:1px;height:24px;background:rgba(255,255,255,.28);
}
.header-search{
  display:flex;align-items:center;width:300px;flex-shrink:0;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);
  border-radius:999px;padding:4px 4px 4px 18px;
  backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  transition:all var(--t);
}
.header-search:focus-within{background:rgba(255,255,255,.22);border-color:rgba(255,255,255,.5);}
.header-search input{flex:1;min-width:0;height:34px;border:none;background:transparent;outline:none;font-size:13px;color:#fff;}
.header-search input::placeholder{color:rgba(255,255,255,.65);}
.header-search button{
  width:34px;height:34px;border:none;border-radius:50%;flex-shrink:0;
  background:#fff;color:var(--accent-2);font-size:13px;
  display:grid;place-items:center;transition:all var(--t);
  box-shadow:0 2px 8px rgba(0,0,0,.12);
}

/* ========== 顶部导航 ========== */
.nav-wrap{
  position:sticky;top:0;z-index:40;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
}
.nav ul{display:flex;justify-content:center;gap:2px;height:50px;overflow-x:auto;scrollbar-width:none;}
.nav ul::-webkit-scrollbar{display:none;}
.nav a{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;height:34px;margin:8px 0;
  font-size:13.5px;font-weight:500;color:var(--text-2);
  white-space:nowrap;border-radius:8px;
  transition:all var(--t-fast);
}
.nav a i{font-size:12px;opacity:.7;}
.nav a:hover{background:#f6f8fc;color:var(--ink);}
.nav a.active{color:var(--accent-2);font-weight:600;}

/* ========== 城市导航 ========== */
.city-line{background:#fff;border-bottom:1px solid var(--line);}
.city-line-inner{
  display:flex;align-items:center;justify-content:center;
  gap:6px;flex-wrap:wrap;padding:11px 0;font-size:12.5px;
}
.city-line-label{display:inline-flex;align-items:center;gap:5px;font-weight:600;color:var(--text-2);flex-shrink:0;}
.city-line-label i{color:var(--accent-2);font-size:11px;}
.city-line a{color:var(--text-2);font-size:12.5px;padding:1px 4px;}
.city-line a:hover{color:var(--accent-2);}
.city-line .sep{color:var(--line);font-size:10px;line-height:1;}
.city-line .more{color:var(--accent-2);font-weight:500;padding-left:6px;}
.city-line .more:hover{text-decoration:underline;}

/* ========== 列表页主体布局 ========== */
.main{margin:24px auto;}
.row{display:flex;gap:20px;align-items:flex-start;}
.sidebar{width:240px;flex-shrink:0;}
.content-area{flex:1;min-width:0;}

/* 左侧导航 */
.sidebar .box{
  background:#fff;padding:20px;border-radius:16px;margin-bottom:15px;
  box-shadow:var(--shadow-sm);border:1px solid #f0f4fc;
}
.sidebar h4{
  font-size:16px;color:var(--accent-2);margin-bottom:12px;
  padding-left:10px;border-left:3px solid var(--accent-2);
}
.sidebar ul li{padding:8px 0;border-bottom:1px dashed #e5e7eb;}
.sidebar ul li:last-child{border-bottom:none;}
.sidebar ul li a{
  color:#4b5563;font-size:14px;display:flex;align-items:center;gap:8px;
  padding-left:10px;transition:0.2s;
}
.sidebar ul li a i{color:var(--accent-2);font-size:14px;width:16px;}
.sidebar ul li a:hover{color:var(--accent-2);font-weight:500;}

/* 列表页头部卡片 */
.page-header{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  flex-wrap:wrap;
  gap:12px;
  background:#fff;
  border-radius:12px;
  padding:10px 24px;
  margin-bottom:22px;
  box-shadow:0 4px 12px rgba(0,0,0,0.03),0 1px 3px rgba(0,0,0,0.05);
  border:1px solid #eef2f8;
  width:100%;
  box-sizing:border-box;
}
.breadcrumb{font-size:14px;color:#6c86a3;white-space:nowrap;}
.breadcrumb a{color:#2c3e50;}
.breadcrumb a:hover{text-decoration:underline;}
.breadcrumb span{color:#2c3e50;font-weight:500;}
.breadcrumb a:last-child{color:#2c3e50;cursor:default;}
.breadcrumb a:last-child:hover{text-decoration:none;}

/* 栏目标题（H2） */
.page-header h2{
  font-size:14px;
  font-weight:normal;
  color:#2c3e50;
  margin:0;
  text-align:right;
  line-height:inherit;
}

/* 问答列表 */
.question-list .item{
  background:#fff;padding:20px 25px;margin-bottom:15px;border-radius:12px;
  box-shadow:0 2px 8px rgba(0,0,0,0.03);border:1px solid #f0f4fc;
}
.item .q-title{
  font-size:18px;font-weight:600;margin-bottom:8px;display:block;color:#1f2937;
}
.item .q-title:hover{color:var(--accent-2);}
.item .q-summary{
  text-align:left;font-size:14px;color:#6b7280;line-height:1.6;margin-bottom:8px;
}
.item .q-meta{
  font-size:12px;color:#9ca3af;display:flex;gap:15px;flex-wrap:wrap;
}

/* 图文列表 */
.item-has-img{display:flex;gap:18px;align-items:flex-start;}
.item .q-img{
  width:140px;height:105px;flex-shrink:0;border-radius:8px;
  overflow:hidden;display:block;
}
.item .q-img img{width:100%;height:100%;object-fit:cover;}
.item .q-info{flex:1;min-width:0;}

/* 分页 */
.pagination{text-align:center;margin-top:25px;}
.pagination a,.pagination span{
  display:inline-block;padding:6px 14px;margin:0 3px;background:#fff;
  border:1px solid #e5e7eb;border-radius:6px;color:#4b5563;font-size:14px;
}
.pagination .current{background:var(--accent-2);color:#fff;border-color:var(--accent-2);}

/* ========== GEO 权威声明 ========== */
.geo-claim{
  margin-top:36px;padding:22px 24px;background:#fff;
  border:1px solid var(--line);border-radius:16px;
  text-align:center;font-size:13.5px;line-height:1.9;color:var(--text-2);
}
.geo-claim p+p{margin-top:6px;}
.geo-claim strong{color:var(--ink);}
.geo-claim i{color:var(--accent-2);margin-right:8px;}

/* ========== 页脚（与首页统一） ========== */
.site-footer{
  margin-top:56px;
  padding:40px 0 32px;
  text-align:center;
  font-size:13.5px;
  color:var(--muted);
  background:linear-gradient(180deg,#fff 0%,#fafbff 100%);
  border-top:1px solid var(--line);
  box-shadow:0 -4px 12px rgba(15,23,42,.03);
}
.site-footer .footer-nav{
  display:flex;flex-wrap:wrap;justify-content:center;
  gap:8px 10px;margin-bottom:18px;
}
.site-footer .footer-nav a{
  color:var(--text-2);text-decoration:none;font-size:13.5px;
  padding:7px 15px;border-radius:999px;background:#f4f7fc;
  transition:all .25s;font-weight:500;
}
.site-footer .footer-nav a:hover{
  background:linear-gradient(135deg,#eff6ff,#dbeafe);
  color:var(--accent-2);transform:translateY(-1px);
}
.site-footer .footer-copy{
  padding-top:16px;margin-top:16px;
  border-top:1px solid var(--line-2);
  font-size:13px;color:var(--text-2);font-weight:500;line-height:1.85;
}
.site-footer .footer-copy a{text-decoration:none;color:var(--text-2);transition:color .2s;}
.site-footer .footer-copy a:hover{color:var(--accent-2);}
.site-footer .footer-disclaimer{
  font-size:12px;color:var(--muted-lt);max-width:900px;
  margin:14px auto 0;line-height:1.8;text-align:center;
}

/* ========== 响应式 ========== */
@media (max-width:960px){
  .sidebar{width:200px;}
}
@media (max-width:768px){
  .container{padding:0 16px;}
  .header{padding:18px 0;}
  .header-slogan{display:none;}
  .header-search{width:100%;flex:0 0 100%;}
  .logo-text{font-size:19px;}
  .brand-mark{width:40px;height:40px;border-radius:12px;font-size:18px;}
  .nav ul{justify-content:flex-start;}
  .city-line-inner{justify-content:flex-start;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;padding:10px 0;}
  .city-line-inner::-webkit-scrollbar{display:none;}
  .city-line a,.city-line-label,.city-line .sep{white-space:nowrap;}
  .row{flex-direction:column;}
  .sidebar{width:100%;}
  .item-has-img{flex-direction:column;}
  .item .q-img{width:100%;height:auto;aspect-ratio:16/9;}
  .page-header{padding:8px 16px;border-radius:16px;}
  .breadcrumb{white-space:normal;}
  .page-header h2{text-align:left;}
  .site-footer{padding:32px 0 24px;margin-top:40px;}
  .site-footer .footer-nav{gap:8px;}
}