/* 拇指校友活动网 · 共享样式（移动端 H5，原生 JS，无 jQuery） */
* { margin:0; padding:0; box-sizing:border-box; -webkit-tap-highlight-color:transparent; }
:root{
  --pri:#4f46e5; --pri-d:#4338ca; --pri-l:#eef0ff;
  --acc:#ff7a18; --acc-d:#f15a00;
  --bg:#f4f5f9; --card:#fff; --text:#1f2330; --muted:#8a90a0; --line:#eef0f4;
  --green:#16a34a; --green-l:#e9f8ef; --red:#e23b3b;
}
html,body{ background:var(--bg); color:var(--text); font-size:14px;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif; }
a{ color:inherit; text-decoration:none; }
img{ display:block; }
.app{ min-height:100vh; padding-bottom:64px; }

/* 顶栏 */
.topbar{ position:sticky; top:0; z-index:20; background:linear-gradient(135deg,var(--pri),var(--pri-d));
  color:#fff; padding:10px 14px 12px; }
.topbar .brand{ display:flex; align-items:center; gap:7px; font-size:17px; font-weight:800; letter-spacing:.5px; }
.topbar .brand .logo{ width:26px; height:26px; border-radius:8px; background:#fff; color:var(--pri);
  display:flex; align-items:center; justify-content:center; font-size:16px; }
.topbar .search{ margin-top:9px; background:rgba(255,255,255,.22); border-radius:18px; padding:7px 12px;
  font-size:12.5px; color:#eef; display:flex; align-items:center; gap:6px; }
.topbar .search input{ border:0; background:transparent; outline:none; color:#fff; flex:1; font-size:13px; }
.topbar .search input::placeholder{ color:#d9dcff; }

/* 通用返回条 */
.navbar{ position:sticky; top:0; z-index:20; background:#fff; border-bottom:1px solid var(--line);
  height:48px; display:flex; align-items:center; padding:0 12px; font-weight:700; }
.navbar .back{ font-size:20px; margin-right:8px; }
.navbar .ttl{ font-size:16px; }
.navbar .right{ margin-left:auto; font-size:13px; color:var(--pri-d); font-weight:600; }

/* 底部 Tab */
.tabbar{ position:fixed; left:0; right:0; bottom:0; height:56px; background:#fff; border-top:1px solid var(--line);
  display:flex; z-index:30; }
.tab{ flex:1; display:flex; flex-direction:column; align-items:center; justify-content:center; gap:2px;
  font-size:11px; color:var(--muted); position:relative; }
.tab .ti{ font-size:20px; }
.tab.on{ color:var(--pri-d); font-weight:700; }

/* 通用区块标题 */
.secttl{ display:flex; align-items:center; margin:14px 14px 8px; }
.secttl .bar{ width:4px; height:16px; border-radius:3px; background:var(--pri); margin-right:8px; }
.secttl .t{ font-size:15px; font-weight:700; }
.secttl .more{ margin-left:auto; font-size:12px; color:var(--muted); }

/* Banner */
.banner{ margin:12px 14px; border-radius:16px; padding:18px 16px; color:#fff;
  background:linear-gradient(120deg,#6366f1,#a855f7); position:relative; overflow:hidden; }
.banner h3{ font-size:17px; font-weight:800; }
.banner p{ font-size:12.5px; opacity:.92; margin-top:6px; line-height:1.5; }
.banner .deco{ position:absolute; right:-10px; top:-10px; font-size:78px; opacity:.18; }

/* 快捷入口 */
.quick{ display:grid; grid-template-columns:repeat(4,1fr); gap:10px; margin:12px 14px; }
.quick .q{ background:#fff; border-radius:14px; padding:12px 6px; text-align:center; }
.quick .q .qi{ font-size:26px; }
.quick .q .qt{ font-size:11.5px; margin-top:6px; color:#444; }

/* 标签 chip */
.chip{ display:inline-block; font-size:11px; padding:2px 9px; border-radius:11px; background:var(--pri-l);
  color:var(--pri-d); font-weight:600; }
.chip.hot{ background:#fff1e6; color:var(--acc-d); }
.chip.off{ background:#eef1f5; color:#6b7280; }

/* 活动卡片 */
.acard{ background:#fff; border-radius:14px; margin:0 14px 12px; overflow:hidden; display:flex; gap:0; }
.acard .cover{ width:104px; height:104px; flex:0 0 104px; display:flex; align-items:center; justify-content:center;
  font-size:46px; color:#fff; }
.acard .body{ flex:1; min-width:0; padding:11px 12px; display:flex; flex-direction:column; }
.acard .tt{ font-size:14.5px; font-weight:700; line-height:1.3; }
.acard .meta{ font-size:11.5px; color:var(--muted); margin-top:5px; display:flex; gap:8px; flex-wrap:wrap; }
.acard .meta .m{ display:flex; align-items:center; gap:3px; }
.acard .foot{ margin-top:auto; display:flex; align-items:center; }
.acard .foot .join{ font-size:11.5px; color:var(--muted); }
.acard .foot .fee{ margin-left:auto; font-weight:700; font-size:13px; color:var(--acc-d); }
.acard .foot .fee.free{ color:var(--green); }

/* 详情页 */
.detail-hero{ position:relative; height:170px; display:flex; align-items:flex-end; padding:14px; color:#fff; }
.detail-hero .big{ font-size:60px; }
.detail-hero .ov{ position:absolute; inset:0; background:linear-gradient(180deg,rgba(0,0,0,.05),rgba(0,0,0,.45)); }
.detail-hero .ht{ position:relative; z-index:2; }
.detail-hero .ht .dt{ font-size:19px; font-weight:800; }
.detail-hero .ht .ds{ font-size:12.5px; opacity:.92; margin-top:5px; }
.ky{ background:#fff; margin:10px 14px; border-radius:14px; padding:14px; display:grid;
  grid-template-columns:repeat(2,1fr); gap:12px; }
.ky .k{ display:flex; gap:8px; align-items:flex-start; }
.ky .k .ki{ font-size:18px; }
.ky .k .kl{ font-size:11.5px; color:var(--muted); }
.ky .k .kv{ font-size:13px; font-weight:600; margin-top:2px; }
.sect{ background:#fff; margin:10px 14px; border-radius:14px; padding:14px; }
.sect .lab{ font-size:13px; color:var(--muted); margin-bottom:10px; font-weight:600; }
.timeline{ position:relative; padding-left:16px; }
.timeline::before{ content:''; position:absolute; left:4px; top:4px; bottom:4px; width:2px; background:var(--line); }
.tl{ position:relative; padding:0 0 14px 4px; }
.tl::before{ content:''; position:absolute; left:-16px; top:3px; width:9px; height:9px; border-radius:50%;
  background:var(--pri); box-shadow:0 0 0 3px var(--pri-l); }
.tl .tt{ font-size:13.5px; font-weight:700; }
.tl .tx{ font-size:12.5px; color:var(--muted); margin-top:3px; line-height:1.4; }
.avatars{ display:flex; }
.avatars .av{ width:34px; height:34px; border-radius:50%; display:flex; align-items:center; justify-content:center;
  color:#fff; font-size:14px; font-weight:700; margin-left:-8px; border:2px solid #fff; }
.avatars .av:first-child{ margin-left:0; }
.qr{ width:150px; height:150px; margin:8px auto; border-radius:12px; background:#fff; border:1px solid var(--line);
  display:flex; align-items:center; justify-content:center; font-size:96px; }
.cmt{ display:flex; gap:10px; padding:10px 0; border-bottom:1px solid var(--line); }
.cmt:last-child{ border-bottom:0; }
.cmt .av{ width:34px; height:34px; border-radius:50%; flex:0 0 34px; display:flex; align-items:center;
  justify-content:center; color:#fff; font-weight:700; }
.cmt .nm{ font-size:13px; font-weight:700; }
.cmt .tx{ font-size:12.5px; color:#444; margin-top:3px; line-height:1.45; }
.cmt .lk{ font-size:11.5px; color:var(--muted); margin-top:4px; }

/* 报名/底部按钮 */
.fixbar{ position:fixed; left:0; right:0; bottom:0; display:flex; gap:10px; padding:10px 12px; background:#fff;
  border-top:1px solid var(--line); z-index:30; }
.btn{ border:0; border-radius:22px; padding:11px 14px; font-size:14px; cursor:pointer; font-weight:700; }
.btn-pri{ background:var(--pri); color:#fff; }
.btn-acc{ background:var(--acc); color:#fff; }
.btn-ghost{ background:var(--pri-l); color:var(--pri-d); }
.btn-block{ display:block; width:100%; text-align:center; }
.btn-lg{ padding:13px; font-size:15px; }
.btn[disabled]{ opacity:.55; }

/* 表单 */
.field{ background:#fff; margin:10px 14px; border-radius:14px; padding:4px 14px; }
.fld{ display:flex; align-items:center; padding:13px 0; border-bottom:1px solid var(--line); }
.fld:last-child{ border-bottom:0; }
.fld label{ width:84px; flex:0 0 84px; font-size:13.5px; color:#444; font-weight:600; }
.fld input,.fld select,.fld textarea{ flex:1; border:0; outline:none; font-size:14px; background:transparent;
  font-family:inherit; color:var(--text); }
.fld textarea{ resize:none; height:64px; padding-top:4px; }
.chips-sel{ display:flex; flex-wrap:wrap; gap:8px; padding:10px 0; }
.chips-sel .c{ font-size:12.5px; padding:6px 13px; border-radius:16px; background:var(--pri-l); color:var(--pri-d);
  border:1px solid transparent; }
.chips-sel .c.on{ background:#fff; border-color:var(--pri); color:var(--pri-d); font-weight:700; }

/* 校友圈 feed */
.post{ background:#fff; margin:10px 14px; border-radius:14px; padding:13px 14px; }
.post .ph{ display:flex; align-items:center; gap:10px; }
.post .ph .av{ width:40px; height:40px; border-radius:50%; display:flex; align-items:center; justify-content:center;
  color:#fff; font-weight:700; font-size:15px; flex:0 0 40px; }
.post .ph .nm{ font-size:14px; font-weight:700; }
.post .ph .tm{ font-size:11.5px; color:var(--muted); margin-top:2px; }
.post .ptx{ font-size:13.5px; line-height:1.6; margin:10px 0; }
.post .pimgs{ display:flex; gap:6px; }
.post .pimgs .im{ width:72px; height:72px; border-radius:10px; display:flex; align-items:center; justify-content:center;
  font-size:34px; color:#fff; }
.post .pacts{ display:flex; gap:18px; margin-top:10px; padding-top:10px; border-top:1px solid var(--line);
  font-size:12.5px; color:var(--muted); }
.post .pacts .pa{ display:flex; align-items:center; gap:5px; }
.post .pacts .pa.on{ color:var(--acc-d); font-weight:700; }

/* 通讯录 */
.filters{ display:flex; gap:8px; padding:12px 14px; overflow-x:auto; }
.filters .f{ flex:0 0 auto; font-size:12.5px; padding:6px 14px; border-radius:16px; background:#fff;
  border:1px solid var(--line); color:#555; }
.filters .f.on{ background:var(--pri); color:#fff; border-color:var(--pri); font-weight:700; }
.alcard{ background:#fff; margin:10px 14px; border-radius:14px; padding:13px; display:flex; gap:12px; align-items:center; }
.alcard .av{ width:48px; height:48px; border-radius:50%; flex:0 0 48px; display:flex; align-items:center; justify-content:center;
  color:#fff; font-weight:700; font-size:17px; }
.alcard .nm{ font-size:14.5px; font-weight:700; }
.alcard .info{ font-size:12px; color:var(--muted); margin-top:4px; line-height:1.45; }
.alcard .tag{ display:inline-block; font-size:10.5px; padding:1px 7px; border-radius:9px; background:var(--green-l);
  color:var(--green); margin-right:5px; margin-top:4px; }

/* 我的 / 校友卡 */
.ucard{ background:linear-gradient(135deg,#4f46e5,#7c3aed); color:#fff; margin:12px 14px; border-radius:18px;
  padding:18px; position:relative; overflow:hidden; }
.ucard .un{ font-size:18px; font-weight:800; }
.ucard .umeta{ font-size:12.5px; opacity:.9; margin-top:5px; line-height:1.5; }
.ucard .ucno{ font-size:13px; opacity:.85; margin-top:14px; letter-spacing:1px;
  font-family:"Courier New",monospace; }
.ucard .badge{ position:absolute; right:16px; top:16px; font-size:12px; background:rgba(255,255,255,.22);
  padding:4px 10px; border-radius:12px; }
.menu{ background:#fff; margin:12px 14px; border-radius:14px; overflow:hidden; }
.menu .mi{ display:flex; align-items:center; padding:14px; border-bottom:1px solid var(--line); }
.menu .mi:last-child{ border-bottom:0; }
.menu .mi .ico{ font-size:19px; width:28px; text-align:center; }
.menu .mi .tx{ flex:1; font-size:14.5px; }
.menu .mi .ar{ color:var(--muted); }

/* 空态 & 提示 */
.empty{ text-align:center; color:var(--muted); padding:42px 0; font-size:13px; }
.toast{ position:fixed; left:50%; top:42%; transform:translate(-50%,-50%); background:rgba(0,0,0,.82); color:#fff;
  padding:11px 18px; border-radius:12px; font-size:13.5px; z-index:60; opacity:0; transition:opacity .25s; pointer-events:none; }
.toast.show{ opacity:1; }