:root{
  --bg:#0a0a0c;
  --fg:#f5f5f7;
  --soft:#b8b8c0;
  --muted:#7a7a82;
  --accent:#c8102e;
  --accent2:#ffb800;
  --grad:linear-gradient(135deg,var(--accent),var(--accent2));
  --line:rgba(255,255,255,.1);
  --glass:rgba(255,255,255,.04);
}
/* 每场大促的主题色 */
body.theme-guoqing{--accent:#c8102e;--accent2:#ffb800;--grad:linear-gradient(135deg,#c8102e,#ffb800)}
body.theme-shuang11{--accent:#ff4d2e;--accent2:#ffb800;--grad:linear-gradient(135deg,#ff4d2e,#ffb800)}
body.theme-shuang12{--accent:#6d28d9;--accent2:#ec4899;--grad:linear-gradient(135deg,#6d28d9,#ec4899)}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--fg);background:var(--bg);line-height:1.55;overflow-x:hidden;-webkit-font-smoothing:antialiased;position:relative;min-height:100vh;display:flex;flex-direction:column}
body::before{content:"";position:fixed;inset:0;z-index:-2;background:radial-gradient(circle at 50% 0%,#2a1015,var(--bg) 70%)}
body::after{content:"";position:fixed;inset:0;z-index:-1;opacity:.5;pointer-events:none;background:radial-gradient(circle at 15% 20%,var(--accent),transparent 45%),radial-gradient(circle at 85% 80%,var(--accent2),transparent 50%);filter:blur(60px)}

/* 顶部导航 */
.nav{position:sticky;top:0;z-index:10;display:flex;justify-content:center;gap:.5rem;padding:.85rem 1rem;background:rgba(10,10,12,.55);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.06);flex-wrap:wrap}
.nav .pill{display:inline-flex;align-items:center;gap:.4rem;padding:.5rem 1rem;border:1px solid var(--line);border-radius:100px;background:var(--glass);color:var(--soft);font-size:.85rem;font-weight:500;cursor:pointer;font-family:inherit;text-decoration:none;transition:.2s;-webkit-tap-highlight-color:transparent}
.nav .pill:hover{border-color:rgba(255,255,255,.25);color:var(--fg)}
.nav .pill.active{background:var(--grad);color:#fff;border-color:transparent;box-shadow:0 4px 18px rgba(0,0,0,.3)}
.nav .pill .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px rgba(255,255,255,.08)}

main{flex:1;width:100%;max-width:880px;margin:0 auto;padding:3rem 1.25rem 3rem;text-align:center}
.wrap{display:flex;flex-direction:column;align-items:center}

.badge{display:inline-flex;align-items:center;gap:.5rem;padding:.35rem .85rem;border:1px solid var(--line);border-radius:100px;background:var(--glass);font-size:.7rem;letter-spacing:.12em;color:var(--soft);margin-bottom:2rem}
.dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px rgba(200,16,46,.25);animation:b 1.6s ease-in-out infinite;flex:none}
.dot.live{background:#2ecc71;box-shadow:0 0 0 3px rgba(46,204,113,.25)}
@keyframes b{50%{opacity:.4}}
h1{font-size:clamp(2.2rem,8.5vw,4.5rem);font-weight:800;line-height:1.12;letter-spacing:-.03em;margin-bottom:1.25rem}
h1 .ac{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
h1 .cur{display:inline-block;color:var(--accent);animation:c 1s steps(1) infinite;font-weight:400}
@keyframes c{50%{opacity:0}}
.lede{font-size:clamp(.95rem,2.2vw,1.125rem);color:var(--soft);max-width:560px;margin:0 auto 2.5rem;line-height:1.7}
.lede b{color:var(--fg)}

/* 倒计时 */
.cd{display:flex;align-items:center;justify-content:center;gap:.4rem;margin-bottom:2.5rem;flex-wrap:wrap;font-family:ui-monospace,Menlo,Consolas,monospace}
.cd .c{background:var(--glass);border:1px solid var(--line);border-radius:14px;padding:.75rem .9rem;min-width:72px;display:flex;flex-direction:column;align-items:center;gap:.2rem}
.cd .n{font-size:clamp(1.5rem,5vw,2.25rem);font-weight:700;font-variant-numeric:tabular-nums;line-height:1}
.cd .l{font-size:.65rem;letter-spacing:.15em;color:var(--muted)}
.cd .s{font-size:clamp(1.25rem,4vw,1.75rem);color:var(--muted);animation:b 1.6s ease-in-out infinite}

/* 区块标题 */
.sec{width:100%;max-width:640px;margin:3.25rem auto 0}
.sec>.st{font-size:.75rem;letter-spacing:.2em;color:var(--muted);text-transform:uppercase;margin-bottom:1rem;display:flex;align-items:center;gap:.75rem;justify-content:center}
.sec>.st::before,.sec>.st::after{content:"";height:1px;width:48px;background:var(--line)}

/* 平台卡片 */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem;width:100%;text-align:left}
.card{background:var(--glass);border:1px solid var(--line);border-radius:18px;padding:1.4rem 1.3rem;display:flex;flex-direction:column;gap:.6rem;transition:.2s transform,.2s border-color}
.card:hover{transform:translateY(-3px);border-color:rgba(255,255,255,.22)}
.plogo{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.25rem;color:#fff;flex:none}
.plogo.pdd{background:linear-gradient(135deg,#e02e24,#ff6b3d)}
.plogo.tb{background:linear-gradient(135deg,#ff5000,#ffb800)}
.plogo.jd{background:linear-gradient(135deg,#c8102e,#f5455c)}
.card h3{font-size:1.05rem;font-weight:700;display:flex;align-items:baseline;gap:.45rem;flex-wrap:wrap}
.card h3 small{font-size:.7rem;color:var(--muted);font-weight:500;letter-spacing:.05em}
.card p{font-size:.85rem;color:var(--soft);line-height:1.65;flex:1}
.card .btn{margin-top:.35rem;display:inline-flex;align-items:center;justify-content:center;gap:.35rem;padding:.55rem 1rem;background:var(--grad);color:#fff;border:none;border-radius:100px;font-weight:600;font-size:.85rem;text-decoration:none;transition:.15s transform;-webkit-tap-highlight-color:transparent}
.card .btn:hover{transform:translateY(-1px)}
.card .btn::after{content:"→"}

/* 三步流程(备用组件) */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;width:100%}
.step{background:var(--glass);border:1px solid var(--line);border-radius:18px;padding:1.25rem 1.2rem;text-align:left}
.step .no{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.75rem;color:var(--accent2);letter-spacing:.15em;margin-bottom:.5rem}
.step h4{font-size:.95rem;margin-bottom:.35rem}
.step p{font-size:.8rem;color:var(--soft);line-height:1.65}

/* 面包屑 */
.crumbs{font-size:.78rem;color:var(--muted);margin-bottom:1.75rem}
.crumbs a{color:var(--soft);text-decoration:none}
.crumbs a:hover{color:var(--fg)}

/* 平台快捷入口(小链接行) */
.plinks{display:flex;gap:.6rem;justify-content:center;flex-wrap:wrap;margin:0 0 2.5rem}
.plinks a{display:inline-flex;padding:.5rem 1.1rem;border:1px solid var(--line);border-radius:100px;background:var(--glass);color:var(--soft);font-size:.85rem;font-weight:500;text-decoration:none;transition:.2s;-webkit-tap-highlight-color:transparent}
.plinks a:hover{color:var(--fg);border-color:rgba(255,255,255,.25)}

/* 大促日历 */
.cal{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;width:100%}
.cal a{background:var(--glass);border:1px solid var(--line);border-radius:18px;padding:1.25rem 1.2rem;text-decoration:none;color:var(--fg);text-align:left;display:flex;flex-direction:column;gap:.3rem;transition:.2s transform,.2s border-color}
.cal a:hover{transform:translateY(-3px);border-color:rgba(255,255,255,.22)}
.cal .date{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:1.6rem;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
.cal .name{font-size:.95rem;font-weight:700}
.cal .status{font-size:.7rem;color:var(--muted);letter-spacing:.1em}
.cal .now{color:#2ecc71}

/* FAQ */
.faq{width:100%;max-width:640px;margin:0 auto;text-align:left;display:flex;flex-direction:column;gap:.6rem}
.faq details{background:var(--glass);border:1px solid var(--line);border-radius:14px;padding:.95rem 1.15rem}
.faq summary{cursor:pointer;font-weight:600;font-size:.92rem;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:1rem}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent2);font-weight:700;flex:none}
.faq details[open] summary::after{content:"–"}
.faq details p{margin-top:.6rem;font-size:.85rem;color:var(--soft);line-height:1.75}

/* 关于(GEO 实体信息) */
.about{font-size:.85rem;color:var(--soft);line-height:1.8;max-width:640px;margin:0 auto;text-align:left}
.about b{color:var(--fg)}

/* 微信卡片 */
.wechat-box{width:100%;max-width:520px;margin:0 auto;padding:1.25rem 1.25rem 1.5rem;background:var(--glass);border:1px solid var(--line);border-radius:18px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.wechat-box .title{font-size:.75rem;letter-spacing:.2em;color:var(--muted);margin-bottom:.75rem;text-align:center}
.wechat-box .row{display:flex;align-items:center;justify-content:center;gap:.6rem;color:var(--soft);font-size:.95rem}
.wechat-box strong{color:var(--fg);font-family:ui-monospace,Menlo,Consolas,monospace;font-size:1.125rem;letter-spacing:.05em;padding:.35rem .7rem;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:8px;font-weight:600}
.wechat-box button{padding:.4rem .9rem;font-size:.8rem;background:var(--grad);color:#fff;border:none;border-radius:100px;font-weight:600;cursor:pointer;font-family:inherit;transition:.15s transform;-webkit-tap-highlight-color:transparent}
.wechat-box button:hover{transform:translateY(-1px)}
.wxmsg{margin-top:.65rem;font-size:.75rem;color:#2ecc71;min-height:1.1em;text-align:center}

/* 提示行 */
.hints{display:flex;flex-wrap:wrap;justify-content:center;gap:.75rem 1.5rem;padding:1rem .5rem;color:var(--soft);font-size:.875rem;min-height:1.5em}
.hints span{display:inline-flex;align-items:center;gap:.4rem}
.hints span::before{content:"";width:4px;height:4px;border-radius:50%;background:var(--accent2)}

footer{text-align:center;padding:1.25rem;font-size:.75rem;color:var(--muted)}
footer a{color:var(--soft)}
footer .fp{margin-top:.35rem}

@media(max-width:520px){
  .cd .c{min-width:62px;padding:.6rem .55rem}
  .wechat-box .row{flex-direction:column;gap:.6rem}
  .wechat-box strong{font-size:1.15rem}
  .nav .pill{padding:.45rem .85rem;font-size:.8rem}
  main{padding:2.25rem 1rem 2.25rem}
}