/* 情怀外卖 · 使用教程知识库 */
:root{
  --navy:#0B1730; --navy2:#122A52; --blue:#1B4F9C; --blue-l:#2F6FD0;
  --orange:#FF8A2B; --orange-l:#FFB765; --ink:#1C2738; --muted:#5D6B80;
  --line:#DCE4F0; --bg:#F4F7FC; --card:#FFFFFF; --radius:14px;
  --shadow:0 6px 22px rgba(11,23,48,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;
  font-size:15px;line-height:1.85;-webkit-text-size-adjust:100%}
a{color:var(--blue-l);text-decoration:none}
a:hover{color:var(--orange)}
img{max-width:100%;height:auto}

/* 顶栏 */
.topbar{position:sticky;top:0;z-index:50;background:linear-gradient(100deg,var(--navy),var(--navy2) 62%,#173C78);
  color:#fff;box-shadow:0 4px 18px rgba(11,23,48,.22)}
.topbar-in{max-width:1380px;margin:0 auto;display:flex;align-items:center;gap:14px;padding:11px 20px}
.brand{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:800;letter-spacing:.5px;white-space:nowrap}
.brand img{width:36px;height:36px;border-radius:50%;flex:0 0 36px}
.brand small{display:block;font-size:11px;font-weight:400;color:#A9C6FF;letter-spacing:2px}
.topbar .spacer{flex:1}
.search-wrap{position:relative;width:min(390px,42vw)}
.search-wrap input{width:100%;padding:9px 14px 9px 36px;border-radius:999px;border:1px solid rgba(255,255,255,.24);
  background:rgba(255,255,255,.12);color:#fff;font-size:14px;outline:none}
.search-wrap input::placeholder{color:#B9CDEE}
.search-wrap input:focus{background:rgba(255,255,255,.2);border-color:var(--orange-l)}
.search-wrap .ico{position:absolute;left:13px;top:50%;transform:translateY(-50%);color:#B9CDEE;font-size:15px}
.search-results{position:absolute;top:46px;left:0;right:0;max-height:430px;overflow:auto;background:#fff;color:var(--ink);
  border-radius:12px;box-shadow:0 16px 40px rgba(11,23,48,.25);display:none;padding:8px}
.search-results.on{display:block}
.search-results a{display:block;padding:9px 12px;border-radius:8px;color:var(--ink);font-size:14px}
.search-results a:hover{background:#EEF4FF;color:var(--blue)}
.search-results small{display:block;color:var(--muted);font-size:12px}
.search-results .empty{padding:14px;color:var(--muted);font-size:13px;text-align:center}
.menu-btn{display:none;background:transparent;border:1px solid rgba(255,255,255,.3);color:#fff;
  border-radius:9px;padding:7px 11px;font-size:15px;cursor:pointer;white-space:nowrap;flex:0 0 auto}

/* 布局 */
.layout{max-width:1380px;margin:0 auto;display:grid;grid-template-columns:286px minmax(0,1fr);gap:22px;padding:22px 20px 60px}
.sidebar{position:sticky;top:78px;align-self:start;max-height:calc(100vh - 100px);overflow:auto;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:12px 10px}
.sidebar h3{margin:6px 10px 10px;font-size:13px;color:var(--muted);letter-spacing:1px;font-weight:700}
.side-group{margin-bottom:4px}
.side-group>button{width:100%;text-align:left;background:#F3F7FF;border:0;border-radius:9px;padding:9px 11px;
  font-size:14px;font-weight:700;color:var(--navy2);cursor:pointer;display:flex;justify-content:space-between;align-items:center}
.side-group>button:hover{background:#E7F0FF}
.side-group>button .cnt{font-size:11px;color:var(--muted);font-weight:400}
.side-group ul{list-style:none;margin:2px 0 6px;padding:0;display:none}
.side-group.open ul{display:block}
.side-group li a{display:block;padding:6px 10px 6px 18px;font-size:13px;color:#44536B;border-left:2px solid transparent;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.side-group li a:hover{border-left-color:var(--orange);background:#FFF6EE;color:var(--blue)}
.side-group li a.active{border-left-color:var(--orange);background:#FFF1E3;color:var(--blue);font-weight:700}
.sidebar .all-link{display:block;margin:8px 10px;font-size:13px;color:var(--blue-l)}

.main{min-width:0}
.crumb{font-size:13px;color:var(--muted);margin:2px 0 12px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--orange)}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);
  padding:26px 30px 30px}
.panel h1{font-size:27px;line-height:1.4;margin:0 0 8px;color:var(--navy)}
.meta{font-size:12px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:20px}

/* 正文 */
.article{font-size:15px;line-height:1.95;color:#25324A}
.article h1,.article h2,.article h3,.article h4{color:var(--navy);line-height:1.45;margin:30px 0 12px;font-weight:800}
.article h1{font-size:23px}.article h2{font-size:20px;border-left:4px solid var(--orange);padding-left:12px}
.article h3{font-size:17px;border-left:3px solid var(--blue-l);padding-left:10px}
.article h4{font-size:15px;color:var(--blue)}
.article p{margin:10px 0}
.article ul,.article ol{padding-left:26px;margin:10px 0}
.article li{margin:5px 0}
.article strong{color:var(--navy)}
.article a{color:var(--blue-l);border-bottom:1px solid #BED3F5}
.article a:hover{color:var(--orange);border-bottom-color:var(--orange)}
.article img{display:block;margin:16px auto;border:1px solid var(--line);border-radius:10px;
  box-shadow:0 3px 12px rgba(11,23,48,.07);cursor:zoom-in;background:#fff}
.article blockquote{margin:14px 0;padding:10px 16px;background:#F5F8FE;border-left:4px solid var(--blue-l);
  border-radius:0 8px 8px 0;color:#41506A}
.article code{background:#F1F4FA;padding:2px 6px;border-radius:5px;font-size:13px;color:#B0441C}
.article hr{border:0;border-top:1px dashed var(--line);margin:24px 0}
.article table{border-collapse:collapse;width:100%;margin:14px 0;font-size:14px}
.article td,.article th{border:1px solid var(--line);padding:8px 10px}
.article th{background:#F3F7FF}
.notice{background:linear-gradient(100deg,#FFF6EA,#FFF9F2);border:1px solid #FFDDB6;border-radius:12px;
  padding:12px 16px;margin:0 0 18px;font-size:13px;color:#7A4A16}
.pager{display:flex;justify-content:space-between;gap:12px;margin-top:26px;padding-top:16px;border-top:1px solid var(--line);font-size:14px}
.pager a{max-width:48%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.footer{max-width:1380px;margin:0 auto;padding:0 20px 40px;color:var(--muted);font-size:13px}
.footer-card{background:linear-gradient(100deg,var(--navy),var(--navy2));color:#DCE8FF;border-radius:var(--radius);
  padding:20px 26px;display:flex;flex-wrap:wrap;gap:18px 42px;align-items:center}
.footer-card b{color:#fff;font-size:15px}
.footer-card .tag{background:rgba(255,138,43,.18);border:1px solid rgba(255,183,101,.5);color:#FFD6A8;
  border-radius:999px;padding:4px 12px;font-size:13px}
.footer-card a{color:#FFD6A8;text-decoration:none;border-bottom:1px solid rgba(255,183,101,.5);padding-bottom:1px;font-size:14px}
.footer-card a:hover{color:#fff}

/* 首页 */
.hero{background:linear-gradient(115deg,var(--navy),#173C78 70%,#215AAE);color:#fff;border-radius:var(--radius);
  padding:36px 38px;margin-bottom:22px;position:relative;overflow:hidden}
.hero:after{content:"";position:absolute;right:-70px;top:-70px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,138,43,.35),transparent 70%)}
.hero h1{font-size:31px;margin:0 0 10px;letter-spacing:.5px}
.hero p{color:#C9DCFF;margin:0 0 20px;font-size:15px}
.hero .stats{display:flex;gap:28px;flex-wrap:wrap;margin-top:18px}
.hero .stats div b{display:block;font-size:25px;color:var(--orange-l)}
.hero .stats div span{font-size:12px;color:#A9C6FF}
.hero-search{max-width:560px;position:relative}
.hero-search input{width:100%;padding:13px 16px 13px 42px;border-radius:999px;border:1px solid rgba(255,255,255,.35);
  background:rgba(255,255,255,.14);color:#fff;font-size:15px;outline:none}
.hero-search .ico{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:#C9DCFF}
.hero-search .search-results{top:52px}
.section-title{font-size:19px;color:var(--navy);margin:26px 0 14px;font-weight:800}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.gcard{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;
  box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s}
.gcard:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(11,23,48,.13)}
.gcard h3{margin:0 0 8px;font-size:16px;color:var(--navy)}
.gcard .n{font-size:12px;color:var(--muted);margin-bottom:8px}
.gcard ul{list-style:none;padding:0;margin:0}
.gcard li{font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin:4px 0}
.gcard li a{color:#4A5C78}
.gcard li a:hover{color:var(--orange)}
.quick{display:flex;flex-wrap:wrap;gap:10px}
.quick a{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-size:14px;color:var(--navy2)}
.quick a:hover{border-color:var(--orange);color:var(--orange)}
.info-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px}
.info-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow)}
.info-card b{color:var(--navy);display:block;margin-bottom:6px}
.info-card span{color:var(--muted);font-size:13px}
/* 官方渠道：可点击复制 + 官网超链接 */
.info-card .copy{cursor:pointer;color:var(--navy2);font-weight:600;
  border-bottom:1px dashed var(--orange-l);transition:color .15s,border-color .15s}
.info-card .copy:hover{color:var(--orange);border-bottom-color:var(--orange)}
.info-card .copy::after{content:" 点击复制";font-size:11px;font-weight:400;color:#9fb0c8}
.info-card a{color:var(--orange);text-decoration:none;font-weight:600;
  border-bottom:1px solid rgba(255,138,43,.5);transition:color .15s}
.info-card a:hover{color:#e06d10}
#copyToast{position:fixed;left:50%;bottom:34px;transform:translateX(-50%) translateY(16px);
  background:linear-gradient(100deg,var(--navy),var(--navy2));color:#fff;padding:10px 20px;
  border-radius:12px;font-size:14px;box-shadow:0 8px 24px rgba(7,26,56,.3);
  opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;z-index:200}
#copyToast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* 图片放大 */
.lightbox{position:fixed;inset:0;background:rgba(6,14,30,.9);z-index:99;display:none;align-items:center;justify-content:center;padding:24px}
.lightbox.on{display:flex}
.lightbox img{max-width:96vw;max-height:92vh;object-fit:contain;border-radius:8px}
.lightbox .close{position:absolute;right:26px;top:20px;color:#fff;font-size:30px;cursor:pointer}
.to-top{position:fixed;right:22px;bottom:22px;background:var(--navy);color:#fff;border:0;border-radius:50%;
  width:42px;height:42px;font-size:18px;cursor:pointer;display:none;box-shadow:0 6px 18px rgba(11,23,48,.3);z-index:40}

@media (max-width:900px){
  .layout{grid-template-columns:1fr;padding:14px 12px 46px}
  .sidebar{position:fixed;left:0;top:60px;bottom:0;width:min(84vw,320px);max-height:none;z-index:45;
    border-radius:0;transform:translateX(-102%);transition:transform .2s;overflow:auto}
  .sidebar.show{transform:translateX(0)}
  .menu-btn{display:block}
  .topbar-in{padding:9px 12px;gap:9px}
  .brand{font-size:16px}.brand small{display:none}
  .search-wrap{width:min(190px,40vw)}
  .panel{padding:18px 16px 24px}
  .panel h1{font-size:22px}
  .hero{padding:26px 20px}.hero h1{font-size:24px}
  .hero .stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px 10px;margin-top:16px}
  .hero .stats div span{white-space:nowrap}
  .footer{padding:0 12px 30px}
}