/* ============================================================
   安工大新生攻略 - 共享样式（马院式多页面框架）
   ============================================================ */
:root{
  --blue:#0f4c81;
  --blue-dark:#0a3a63;
  --blue-light:#eaf2fa;
  --gold:#c9a227;
  --ink:#24303c;
  --muted:#64748b;
  --bg:#f6f9fc;
  --card:#ffffff;
  --border:#e2eaf3;
  --radius:14px;
  --shadow:0 2px 10px rgba(15,76,129,.08);
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.7;
}
a{color:var(--blue);text-decoration:none;}
a:hover{text-decoration:underline;}

/* ===== 左侧目录（马院式） ===== */
.sidebar-nav{
  position:fixed;left:0;top:0;bottom:0;width:232px;z-index:60;
  background:linear-gradient(180deg,var(--blue-dark) 0%,#0d4a7c 100%);
  display:flex;flex-direction:column;overflow-y:auto;overflow-x:hidden;
  padding:0 0 20px;
}
.sidebar-logo{
  display:flex;align-items:center;gap:10px;grid-gap:10px;padding:22px 20px 16px;
  border-bottom:1px solid rgba(255,255,255,.14);margin-bottom:12px;
}
.sidebar-logo .logo-icon{font-size:28px;}
.sidebar-logo .logo-text{color:#fff;font-weight:800;font-size:16px;line-height:1.3;}
.sidebar-nav a{
  display:flex;align-items:center;gap:11px;grid-gap:11px;color:#c8dcef;padding:10px 20px;
  font-size:14px;border-left:3px solid transparent;transition:.18s;
}
.sidebar-nav a:hover{background:rgba(255,255,255,.09);color:#fff;text-decoration:none;}
.sidebar-nav a.active{
  background:rgba(255,255,255,.14);color:#fff;border-left-color:var(--gold);font-weight:600;
}
.sidebar-nav .nav-icon{width:22px;text-align:center;flex-shrink:0;}
.sidebar-foot{
  margin-top:auto;padding:18px 20px 6px;font-size:11px;color:rgba(255,255,255,.45);line-height:1.8;
  border-top:1px solid rgba(255,255,255,.1);
}
.sidebar-mask{
  position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(10,30,50,.45);z-index:55;opacity:0;
  visibility:hidden;transition:.25s;
}
.sidebar-mask.show{opacity:1;visibility:visible;}

/* ===== 主内容区 ===== */
.main{margin-left:232px;min-height:100vh;display:flex;flex-direction:column;}
.main .wrap{flex:1;}

/* ===== Hero ===== */
.hero{
  background:linear-gradient(135deg,var(--blue-dark) 0%,var(--blue) 55%,#1a6ba8 100%);
  color:#fff;padding:38px 24px 34px;text-align:center;
  position:relative;overflow:hidden;
}
.hero::after{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;
  border-radius:50%;background:rgba(255,255,255,.06);
}
.hero::before{
  content:"";position:absolute;left:-60px;bottom:-100px;width:240px;height:240px;
  border-radius:50%;background:rgba(255,255,255,.05);
}
.hero .badge{
  display:inline-block;background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.35);border-radius:999px;
  padding:4px 16px;font-size:13px;letter-spacing:1px;margin-bottom:14px;
  position:relative;z-index:1;
}
.hero h1{font-size:30px;margin-bottom:8px;position:relative;z-index:1;}
.hero .sub{font-size:15px;opacity:.92;position:relative;z-index:1;}
.hero .tag{
  margin-top:14px;font-size:14px;position:relative;z-index:1;
  background:rgba(255,255,255,.12);display:inline-block;
  padding:6px 18px;border-radius:999px;
}
.hero .tag b{color:#ffe9a8;}

/* ===== 主体容器 ===== */
.wrap{max-width:960px;margin:30px auto 60px;padding:0 20px;}
section.block{scroll-margin-top:18px;}

/* 速览指标 */
.metrics{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px;grid-gap:14px;
}
.metric{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:22px 16px;text-align:center;box-shadow:var(--shadow);
}
.metric .num{font-size:30px;font-weight:800;color:var(--blue);}
.metric .label{font-size:14px;color:var(--muted);margin-top:4px;}

/* 通用区块 */
section.block{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:30px 28px;margin-top:26px;
}
section.block h2{
  font-size:22px;color:var(--blue-dark);margin-bottom:6px;
  display:flex;align-items:center;gap:10px;grid-gap:10px;
}
section.block .lead{color:var(--muted);font-size:14px;margin-bottom:20px;}
section.block h3{font-size:16px;color:var(--blue-dark);margin:20px 0 8px;}

.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px;grid-gap:16px;}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;grid-gap:14px;}
@media(max-width:720px){.grid2,.grid3{grid-template-columns:1fr;}}

.item{
  background:var(--bg);border:1px solid var(--border);border-radius:10px;
  padding:14px 16px;font-size:14px;
}
.item b{color:var(--blue-dark);}
.item .desc{color:var(--muted);font-size:13px;margin-top:2px;}

/* 学院链接卡片 */
a.college{
  display:block;background:var(--bg);border:1px solid var(--border);border-radius:10px;
  padding:14px 16px;font-size:14px;font-weight:600;color:var(--blue-dark);
  transition:.2s;position:relative;
}
a.college .link-hint{
  display:block;font-size:12px;font-weight:400;color:var(--muted);margin-top:2px;
}
a.college:hover{
  background:var(--blue);border-color:var(--blue);color:#fff;text-decoration:none;
  transform:translateY(-2px);box-shadow:0 4px 14px rgba(15,76,129,.25);
}
a.college:hover .link-hint{color:#dcebfa;}
a.college::after{
  content:"↗";position:absolute;top:12px;right:14px;font-size:15px;color:var(--blue);transition:.2s;
}
a.college:hover::after{color:#fff;}

ul.clean{list-style:none;margin-top:8px;}
ul.clean li{padding:7px 0 7px 26px;position:relative;font-size:15px;border-bottom:1px dashed var(--border);}
ul.clean li:last-child{border-bottom:none;}
ul.clean li::before{
  content:"";position:absolute;left:4px;top:15px;width:8px;height:8px;
  border-radius:50%;background:var(--gold);
}

ol.steps{list-style:none;counter-reset:step;margin-top:8px;}
ol.steps li{
  counter-increment:step;position:relative;padding:10px 0 10px 46px;font-size:15px;
  border-bottom:1px dashed var(--border);
}
ol.steps li:last-child{border-bottom:none;}
ol.steps li::before{
  content:counter(step);position:absolute;left:0;top:10px;width:30px;height:30px;
  border-radius:50%;background:var(--blue);color:#fff;font-weight:700;
  display:flex;align-items:center;justify-content:center;font-size:14px;
}
ol.steps li b{color:var(--blue-dark);}

/* 时间线 */
.timeline{position:relative;margin:14px 0 0 6px;padding-left:26px;}
.timeline::before{
  content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:var(--blue-light);
}
.tl-item{position:relative;padding:8px 0 14px;}
.tl-item::before{
  content:"";position:absolute;left:-26px;top:15px;width:12px;height:12px;border-radius:50%;
  background:var(--blue);border:3px solid #fff;box-shadow:0 0 0 2px var(--blue-light);
}
.tl-item .year{font-weight:800;color:var(--blue);font-size:15px;}
.tl-item .txt{font-size:14px;color:var(--ink);}

/* 提醒条 */
.alert{
  background:#fff8e6;border:1px solid #f0dc9a;border-radius:10px;
  padding:12px 16px;font-size:14px;color:#7a5c00;margin-top:16px;
}
.notice{
  background:var(--blue-light);border:1px solid #c9dcee;border-radius:10px;
  padding:12px 16px;font-size:14px;color:var(--blue-dark);margin-top:16px;
}

/* 官方链接表 */
.links{
  display:grid;grid-template-columns:1fr 1fr;gap:12px;grid-gap:12px;
}
@media(max-width:720px){.links{grid-template-columns:1fr;}}
.link-card{
  display:flex;align-items:center;gap:12px;grid-gap:12px;background:var(--bg);
  border:1px solid var(--border);border-radius:10px;padding:12px 16px;transition:.2s;
}
.link-card:hover{border-color:var(--blue);box-shadow:var(--shadow);text-decoration:none;transform:translateY(-1px);}
.link-card .ico{
  width:38px;height:38px;border-radius:9px;background:var(--blue);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0;
}
.link-card .t{font-weight:700;color:var(--blue-dark);font-size:14px;}
.link-card .d{font-size:12px;color:var(--muted);}

/* ===== 首页：快速导航网格（马院式：3列上图下文卡片） ===== */
.section-title{
  display:flex;align-items:center;gap:8px;grid-gap:8px;
  background:var(--bg);border-left:4px solid var(--blue);
  padding:10px 14px;border-radius:8px;font-size:16px;font-weight:700;color:var(--blue-dark);
  margin-bottom:12px;
}
.menu-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:12px;grid-gap:12px;margin-top:0;
}
.menu-item{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;grid-gap:9px;
  background:var(--card);border:1px solid var(--border);border-radius:12px;
  box-shadow:0 2px 8px rgba(0,0,0,.06);padding:18px 8px;text-align:center;
  transition:.2s;color:var(--ink);
}
.menu-item:hover{
  border-color:var(--blue);transform:translateY(-2px);
  box-shadow:0 4px 14px rgba(15,76,129,.18);text-decoration:none;
}
.menu-item .menu-icon{font-size:30px;line-height:1;flex-shrink:0;}
.menu-item .menu-label{font-weight:600;color:var(--ink);font-size:14px;}
.menu-item .menu-desc{display:none;}
@media(max-width:720px){
  .menu-grid{gap:10px;grid-gap:10px;}
  .menu-item{padding:14px 6px;}
  .menu-item .menu-icon{font-size:26px;}
  .menu-item .menu-label{font-size:13px;}
}

/* ===== 首页：学校信息横幅（仿马院） ===== */
.school-info-banner{
  display:grid;grid-template-columns:1fr 1fr;gap:12px;grid-gap:12px;margin-top:14px;
}
@media(max-width:720px){.school-info-banner{grid-template-columns:1fr;}}
.school-info-card{
  display:flex;align-items:center;gap:10px;grid-gap:10px;background:var(--bg);
  border:1px solid var(--border);border-radius:10px;padding:12px 14px;font-size:14px;
}
.school-info-card .info-icon{font-size:18px;}
.school-info-card .info-highlight{color:var(--blue);font-weight:700;}


/* ===== 校区地图卡片 ===== */
.map-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;grid-gap:16px;margin-top:14px;}
@media(max-width:720px){.map-grid{grid-template-columns:1fr;}}
.map-card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);
}
.map-card img{width:100%;height:auto;display:block;}
.map-card .map-cap{
  padding:10px 14px;font-size:13px;color:var(--muted);text-align:center;
  border-top:1px solid var(--border);background:var(--bg);
}
.map-tip{
  margin-top:14px;background:#fff8e6;border:1px solid #f0dc9a;border-radius:10px;
  padding:10px 14px;font-size:13px;color:#7a5c00;text-align:center;
}

/* ===== 校区地图：统一尺寸 + 点击放大 ===== */
.map-card img{
  width:100%;height:auto;display:block;
  aspect-ratio:4/3;min-height:260px;object-fit:contain;background:#eef2f6;
  cursor:zoom-in;transition:.2s;
}
.map-card img:hover{opacity:.9;}

/* ===== 学院分布表格 ===== */
.campus-table{width:100%;border-collapse:collapse;margin-top:12px;font-size:14px;}
.campus-table th,.campus-table td{border:1px solid var(--border);padding:10px 12px;text-align:left;}
.campus-table th{background:var(--blue-light);color:var(--blue-dark);font-weight:700;}
.campus-table tr:nth-child(even){background:var(--bg);}
.badge-jc{display:inline-block;background:#e8f4fd;color:#0f4c81;border-radius:999px;padding:2px 10px;font-size:12px;font-weight:600;}
.badge-xs{display:inline-block;background:#eafaf0;color:#1a7f4b;border-radius:999px;padding:2px 10px;font-size:12px;font-weight:600;}

/* ===== Lightbox 点击放大 ===== */
.lightbox{
  position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(0,0,0,.88);z-index:100;
  display:none;align-items:center;justify-content:center;cursor:zoom-out;
}
.lightbox.show{display:flex;}
.lightbox img{max-width:94%;max-height:92%;border-radius:8px;box-shadow:0 8px 40px rgba(0,0,0,.5);}
.lightbox .lb-close{position:absolute;top:14px;right:22px;color:#fff;font-size:36px;cursor:pointer;line-height:1;font-weight:300;}

/* ===== 微信悬浮按钮与弹窗（马院式） ===== */
.qq-float{
  position:fixed;right:20px;bottom:84px;z-index:70;width:52px;height:52px;border-radius:50%;
  background:linear-gradient(135deg,#07c160,#06ad56);color:#fff;font-size:24px;border:none;cursor:pointer;
  box-shadow:0 4px 14px rgba(7,193,96,.4);display:flex;align-items:center;justify-content:center;transition:.2s;
}
.qq-float:hover{transform:scale(1.08);}
.modal-overlay{
  position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(0,0,0,.55);z-index:90;display:none;
  align-items:center;justify-content:center;padding:20px;
}
.modal-overlay.show{display:flex;}
.modal-content{
  background:#fff;border-radius:18px;max-width:340px;width:100%;overflow:hidden;
  box-shadow:0 12px 40px rgba(0,0,0,.3);animation:modalIn .25s ease;
}
@keyframes modalIn{from{transform:translateY(20px);opacity:0}to{transform:none;opacity:1}}
.wechat-modal-header{background:linear-gradient(135deg,#07c160,#06ad56);color:#fff;padding:20px 22px;text-align:center;}
.wechat-modal-header h3{font-size:17px;margin-bottom:4px;}
.wechat-modal-subtitle{font-size:13px;opacity:.9;}
.wechat-modal-body{padding:20px 22px;text-align:center;}
.wechat-label{font-size:12px;color:var(--muted);margin-bottom:8px;}
.wechat-id-box{
  display:flex;align-items:center;justify-content:center;gap:8px;grid-gap:8px;
  background:var(--bg);border:1px solid var(--border);border-radius:10px;
  padding:12px;margin-bottom:10px;font-size:16px;font-weight:700;color:var(--ink);
}
.wechat-note{font-size:12px;color:var(--muted);margin:10px 0 4px;}
.wechat-hint{font-size:12px;color:#07a754;margin-bottom:14px;}
.wechat-actions{display:flex;gap:10px;grid-gap:10px;}
.wechat-btn{flex:1;border:none;border-radius:10px;padding:12px;font-size:14px;cursor:pointer;font-weight:600;}
.wechat-btn-outline{background:var(--bg);color:var(--muted);}
.wechat-btn-primary{background:#07c160;color:#fff;}
.wechat-btn-primary:hover{background:#06ad56;}
.wechat-toast{display:none;font-size:13px;color:#07a754;margin-top:10px;}
.wechat-toast.show{display:block;}
@media(max-width:900px){.qq-float{bottom:142px;}}

/* ===== 转专业 QQ 群横幅 ===== */
.qq-banner{
  background:linear-gradient(135deg,#1a6fb5 0%,#0f4c81 100%);
  border-radius:var(--radius);color:#fff;text-align:center;
  padding:30px 22px;margin-bottom:26px;position:relative;overflow:hidden;
  box-shadow:var(--shadow);
}
.qq-banner::after{content:"";position:absolute;right:-60px;top:-60px;width:180px;height:180px;border-radius:50%;background:rgba(255,255,255,.07);}
.qq-banner::before{content:"";position:absolute;left:-40px;bottom:-80px;width:160px;height:160px;border-radius:50%;background:rgba(255,255,255,.05);}
.qq-banner .qb-title{font-size:16px;font-weight:700;margin-bottom:8px;position:relative;z-index:1;}
.qq-banner .qb-sub{font-size:14px;opacity:.95;margin-bottom:6px;position:relative;z-index:1;}
.qq-banner .qb-desc{font-size:13px;opacity:.85;margin-bottom:14px;position:relative;z-index:1;}
.qq-banner .qb-pill{
  display:inline-block;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);
  border-radius:999px;padding:6px 18px;font-size:13px;margin-bottom:14px;position:relative;z-index:1;
}
.qq-banner .qb-num{
  font-size:32px;font-weight:800;color:#ffd34d;letter-spacing:2px;position:relative;z-index:1;
  text-shadow:0 2px 8px rgba(0,0,0,.2);
}

/* ===== 全站搜索 ===== */
.search-btn{
  position:absolute;top:16px;right:16px;z-index:5;
  width:40px;height:40px;border-radius:12px;border:none;cursor:pointer;
  background:rgba(255,255,255,.2);color:#fff;font-size:18px;
  display:flex;align-items:center;justify-content:center;transition:.2s;
}
.search-btn:hover{background:rgba(255,255,255,.35);}
.search-modal{
  position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(0,0,0,.6);z-index:95;
  display:none;align-items:flex-start;justify-content:center;padding:60px 16px 16px;
}
.search-modal.show{display:flex;}
.search-box{
  background:#fff;border-radius:16px;width:100%;max-width:560px;
  max-height:78vh;display:flex;flex-direction:column;overflow:hidden;
  box-shadow:0 12px 40px rgba(0,0,0,.3);
}
.search-head{display:flex;gap:8px;grid-gap:8px;padding:14px;border-bottom:1px solid var(--border);}
.search-head input{
  flex:1;border:1px solid var(--border);border-radius:10px;
  padding:10px 14px;font-size:15px;outline:none;color:var(--ink);
}
.search-head input:focus{border-color:var(--blue);}
.search-close{
  border:none;background:var(--bg);border-radius:10px;width:42px;
  font-size:20px;cursor:pointer;color:var(--muted);flex-shrink:0;
}
.search-close:hover{color:var(--blue);}
.search-results{overflow-y:auto;padding:8px;}
.search-empty{padding:18px;text-align:center;color:var(--muted);font-size:14px;}
.search-hit{display:block;padding:12px 14px;border-radius:10px;border-bottom:1px dashed var(--border);}
.search-hit:last-child{border-bottom:none;}
.search-hit:hover{background:var(--blue-light);text-decoration:none;}
.sh-title{display:block;font-weight:700;color:var(--blue-dark);font-size:15px;margin-bottom:4px;}
.sh-snip{display:block;font-size:13px;color:var(--muted);line-height:1.6;}

/* ===== 搜索历史 ===== */
.sh-head{display:flex;justify-content:space-between;align-items:center;padding:10px 14px 4px;font-size:13px;color:var(--muted);}
.sh-clear{border:none;background:none;color:var(--muted);font-size:13px;cursor:pointer;padding:4px 8px;border-radius:6px;}
.sh-clear:hover{color:#d4380d;background:#fdf0ee;}
.sh-item{display:flex;align-items:center;gap:4px;grid-gap:4px;padding:2px 8px;}
.sh-word{
  flex:1;text-align:left;border:none;background:none;padding:9px 12px;font-size:15px;
  color:var(--ink);cursor:pointer;border-radius:8px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.sh-word:hover{background:var(--blue-light);color:var(--blue-dark);}
.sh-del{
  border:none;background:none;color:#bbb;font-size:18px;cursor:pointer;
  padding:4px 12px;border-radius:8px;flex-shrink:0;line-height:1.4;
}
.sh-del:hover{color:#d4380d;background:#fdf0ee;}

/* ===== 页面过渡：软导航无闪烁，无需动画 ===== */
a:active{opacity:.7;}

/* ===== 欢迎弹窗（打开网站弹出） ===== */
.welcome-modal{
  position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(0,0,0,.5);z-index:99;
  display:none;align-items:center;justify-content:center;padding:24px;
}
.welcome-modal.show{display:flex;}
.welcome-card{
  background:#fff;border-radius:20px;width:100%;max-width:340px;
  position:relative;padding:30px 24px 24px;text-align:center;
  box-shadow:0 16px 48px rgba(0,0,0,.25);animation:wmIn .3s ease;
}
@keyframes wmIn{from{transform:scale(.92);opacity:0;}to{transform:none;opacity:1;}}
.welcome-close{
  position:absolute;top:12px;right:12px;width:30px;height:30px;border-radius:50%;
  background:#f3f4f6;border:none;color:#4b5563;font-size:16px;cursor:pointer;line-height:1;
}
.welcome-close:hover{background:#e5e7eb;}
.welcome-title{font-size:19px;font-weight:700;color:#1f2937;margin-bottom:10px;}
.welcome-text{font-size:14px;color:#6b7280;line-height:1.6;margin-bottom:18px;}
.welcome-qr{
  width:190px;height:190px;border-radius:12px;border:1px solid #e5e7eb;
  object-fit:contain;background:#fff;
}
.welcome-group{font-size:12px;color:#9ca3af;margin:10px 0 18px;}
.welcome-btn{
  width:100%;height:46px;border:none;border-radius:12px;
  background:#3b82f6;color:#fff;font-size:16px;font-weight:700;cursor:pointer;transition:.2s;
}
.welcome-btn:hover{background:#2563eb;}

/* 欢迎弹窗：桌面端适配 */
@media(min-width:721px){
  .welcome-card{max-width:420px;padding:38px 34px 28px;}
  .welcome-qr{width:220px;height:220px;}
  .welcome-title{font-size:21px;}
}

.welcome-qr{cursor:zoom-in;transition:.2s;}
.welcome-qr:hover{transform:scale(1.03);}
.welcome-hint{font-size:12px;color:#9ca3af;margin:-10px 0 16px;}
/* 页脚 */
footer{
  background:var(--blue-dark);color:#cfe0f0;text-align:center;
  padding:30px 20px;font-size:13px;line-height:2;
}
footer b{color:#fff;}
footer .warn{color:#ffd97a;}

/* 回到顶部 */
.totop{
  position:fixed;right:20px;bottom:20px;width:44px;height:44px;border-radius:50%;
  background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:20px;box-shadow:var(--shadow);z-index:9;transition:.2s;
}
.totop:hover{background:var(--blue-dark);text-decoration:none;transform:translateY(-2px);}

/* 移动端：汉堡按钮 + 底部导航 */
.menu-btn{
  display:none;position:fixed;left:14px;top:14px;z-index:70;
  width:42px;height:42px;border-radius:10px;border:none;cursor:pointer;
  background:var(--blue);color:#fff;font-size:19px;
  box-shadow:0 2px 10px rgba(15,76,129,.35);align-items:center;justify-content:center;
}
.menu-btn:hover{background:var(--blue-dark);}
.bottom-nav{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:65;
  background:#fff;border-top:1px solid var(--border);
  box-shadow:0 -2px 10px rgba(15,76,129,.08);
  grid-template-columns:repeat(4,1fr);padding:6px 4px calc(6px + constant(safe-area-inset-bottom));
  padding:6px 4px calc(6px + env(safe-area-inset-bottom));
}
.bottom-nav a{
  display:flex;flex-direction:column;align-items:center;gap:2px;grid-gap:2px;
  font-size:11px;color:var(--muted);padding:4px 0;
}
.bottom-nav a .nav-icon{font-size:18px;}
.bottom-nav a.active{color:var(--blue);font-weight:600;}
.bottom-nav a:hover{text-decoration:none;color:var(--blue);}

@media(max-width:900px){
  .sidebar-nav{
    transform:translateX(-105%);transition:transform .28s ease;
    box-shadow:4px 0 24px rgba(10,30,50,.35);
  }
  .sidebar-nav.open{transform:translateX(0);}
  .main{margin-left:0;}
  .menu-btn{display:flex;}
  .bottom-nav{display:grid;}
  .main{padding-bottom:64px;}
  .hero{padding-top:64px;}
  .totop{bottom:74px;}
}


/* 趣味游戏 */
.game-wrap{background:#fff;border:1px solid #e5edf5;border-radius:14px;padding:8px;box-shadow:0 2px 8px rgba(15,76,129,.06);}
.game-wrap iframe{display:block;width:100%;height:640px;border:none;border-radius:10px;background:#fafafa;}
@media(max-width:720px){
  .game-wrap iframe{height:520px;}
}

/* 游戏工具栏与全屏 */
.game-toolbar{display:flex;gap:10px;margin:0 0 10px;justify-content:flex-end;flex-wrap:wrap;}
.game-fs-btn{display:inline-flex;align-items:center;gap:4px;background:#0f4c81;color:#fff;border:none;padding:9px 16px;border-radius:8px;font-size:14px;cursor:pointer;text-decoration:none;font-family:inherit;line-height:1.4;}
.game-fs-btn:hover{background:#2563eb;}
.game-fs-btn:active{transform:scale(.97);}
.game-wrap:fullscreen{background:#000;padding:0;border:none;border-radius:0;}
.game-wrap:-webkit-full-screen{background:#000;padding:0;border:none;border-radius:0;width:100%;height:100%;}
.game-wrap:fullscreen iframe,.game-wrap:-webkit-full-screen iframe{height:100vh;border-radius:0;}