:root {
  --bg: #ffffff;
  --surface: #fafafa;
  --surface-2: #f4f4f5;
  --border: #ebebed;       /* 发丝级细边框 */
  --border-strong: #d4d4d8; /* 输入框等可交互元素的明显边框 */
  --text: #0a0a0b;         /* 近黑 */
  --muted: #71717a;
  --accent: #2f6bff;       /* 唯一强调色，用于价格/链接，克制 */
  --accent-soft: #eef3ff;  /* 强调色浅底 */
  --ink: #111113;          /* 黑色按钮 */
  --ok: #16a34a;
  --pending: #b45309;
  --danger: #dc2626;
  --radius: 10px;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --sans: Inter, "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --maxw: 1080px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* 顶栏 —— 极简，发丝下边框 */
.site-head {
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(8px); z-index: 20;
}
.site-head .wrap {
  display: flex; align-items: center; justify-content: space-between; height: 64px;
}
.logo { font-weight: 650; letter-spacing: -0.02em; font-size: 17px; color: var(--text); }
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a { color: var(--muted); font-size: 14px; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.lang { display: flex; gap: 2px; }
.lang a {
  font-family: var(--mono); font-size: 12px; padding: 3px 7px; border-radius: 6px;
  color: var(--muted);
}
.lang a.on { color: var(--text); background: var(--surface-2); }

/* Hero —— 大量留白 */
.hero { padding: 88px 0 40px; max-width: 680px; }
.hero h1 {
  font-size: clamp(30px, 5vw, 44px); line-height: 1.08; letter-spacing: -0.035em;
  margin: 0 0 18px; font-weight: 700;
}
.hero p { font-size: 18px; color: var(--muted); margin: 0; }

/* 分类与商品 */
.cat-block { padding: 8px 0 48px; }
.cat-title {
  font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--muted); margin: 40px 0 16px; font-weight: 600;
}
.grid {
  display: grid; gap: 1px; background: var(--border);
  border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.item {
  background: var(--bg); padding: 22px; display: block; color: inherit;
  transition: background 0.15s;
}
.item:hover { background: var(--surface); text-decoration: none; }
.item h3 { margin: 0 0 6px; font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }
.item .meta { color: var(--muted); font-size: 13px; min-height: 38px; }
.item .foot { display: flex; align-items: baseline; justify-content: space-between; margin-top: 18px; }
.price { font-family: var(--mono); font-size: 18px; color: var(--accent); font-weight: 500; }
.price small { color: var(--muted); font-size: 12px; font-weight: 400; }
.stock { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.stock.out { color: var(--danger); }

/* 按钮 —— 黑底白字，极简 */
.btn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  background: var(--ink); color: #fff; font-weight: 550; border: none;
  padding: 12px 20px; border-radius: 8px; font-size: 15px; font-family: var(--sans);
}
.btn:hover { background: #000; text-decoration: none; }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* 表单 */
.field { margin: 16px 0; }
.field label { display: block; font-size: 13px; color: var(--text); margin-bottom: 7px; font-weight: 500; }
.input, textarea.input, select.input {
  width: 100%; padding: 12px 14px; background: var(--bg);
  border: 1.5px solid var(--border-strong); border-radius: 9px; color: var(--text);
  font-family: var(--sans); font-size: 15px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
  transition: border-color .15s, box-shadow .15s;
}
.input::placeholder { color: #a1a1aa; }
.input:hover, textarea.input:hover, select.input:hover { border-color: #b4b4bb; }
.input:focus, textarea.input:focus, select.input:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(47,107,255,0.12);
}
select.input { cursor: pointer; appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2371717a' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center; padding-right: 38px;
}
.input.mono { font-family: var(--mono); }

/* 商品详情 */
.product { padding: 56px 0; display: grid; grid-template-columns: 1fr 360px; gap: 56px; }
.product h1 { font-size: 30px; letter-spacing: -0.03em; margin: 0 0 16px; }
.product .body { color: #3f3f46; line-height: 1.75; }
.buy-card {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 24px;
  align-self: start; position: sticky; top: 88px;
}
.buy-card .big-price { font-family: var(--mono); font-size: 26px; color: var(--accent); }

/* 付款/取卡页 */
.pay {
  max-width: 540px; margin: 56px auto; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px;
}
.pill {
  display: inline-flex; align-items: center; gap: 8px; font-family: var(--mono);
  font-size: 12px; padding: 5px 11px; border-radius: 999px; border: 1px solid var(--border);
}
.pill.pending { color: var(--pending); }
.pill.done { color: var(--ok); border-color: var(--ok); }
.pulse { width: 7px; height: 7px; border-radius: 50%; background: currentColor; animation: pulse 1.4s infinite; }
@keyframes pulse { 0%,100%{opacity:.3} 50%{opacity:1} }
.amount { font-family: var(--mono); font-size: 28px; margin: 18px 0 4px; }
.addr {
  font-family: var(--mono); font-size: 13px; word-break: break-all;
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  padding: 12px; margin: 12px 0;
}
.secret {
  font-family: var(--mono); font-size: 14px; background: var(--surface);
  border: 1px solid var(--border); border-left: 3px solid var(--ok);
  border-radius: 6px; padding: 12px; margin: 8px 0; word-break: break-all;
}

/* 博客 */
.post-list { padding: 40px 0; max-width: 720px; }
.post-list .post { padding: 24px 0; border-bottom: 1px solid var(--border); }
.post-list .post h2 { font-size: 20px; margin: 0 0 6px; letter-spacing: -0.02em; }
.post-list .post h2 a { color: var(--text); }
.post-list .post time { color: var(--muted); font-size: 13px; font-family: var(--mono); }
.article { max-width: 720px; padding: 56px 0; }
.article h1 { font-size: 34px; letter-spacing: -0.03em; line-height: 1.15; }
.article .content { line-height: 1.8; color: #27272a; font-size: 16px; }
.article .content h2 { margin-top: 2em; letter-spacing: -0.02em; }

/* 提示 */
.alert { padding: 12px 16px; border-radius: 8px; margin: 16px 0; font-size: 14px; }
.alert.err { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }
.alert.ok { background: #f0fdf4; color: var(--ok); border: 1px solid #bbf7d0; }

.site-foot { border-top: 1px solid var(--border); padding: 40px 0; color: var(--muted); font-size: 13px; margin-top: 40px; }

@media (max-width: 760px) {
  .product { grid-template-columns: 1fr; gap: 32px; }
  .buy-card { position: static; }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; } }

/* ===== 付款页增强：倒计时 + 支付提醒 ===== */
.countdown {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  margin: 16px 0; padding: 14px; border-radius: 10px;
  background: var(--surface); border: 1px solid var(--border);
}
.countdown .cd-label { font-size: 13px; color: var(--muted); }
.countdown .cd-time {
  font-family: var(--mono); font-size: 20px; font-weight: 600; color: var(--text);
  letter-spacing: 0.5px;
}
.countdown.expired { background: #fef2f2; border-color: #fecaca; }
.countdown.expired .cd-time { color: var(--danger); }

.pay-tips {
  margin: 20px 0; padding: 16px; border-radius: 10px;
  background: var(--accent-soft); border: 1px solid #d6e2ff;
}
.pay-tips h4 { margin: 0 0 10px; font-size: 14px; color: var(--text); font-weight: 600; }
.pay-tips ul { margin: 0; padding-left: 18px; }
.pay-tips li { font-size: 13px; color: #3f4453; line-height: 1.7; }
.pay-tips li strong { color: var(--accent); }

.copy-btn-inline {
  display: inline-flex; align-items: center; gap: 5px; cursor: pointer;
  font-size: 12px; color: var(--accent); background: none; border: none; padding: 4px 8px;
  font-family: var(--sans); border-radius: 6px;
}
.copy-btn-inline:hover { background: var(--accent-soft); }

/* ===== 订单查询页 ===== */
.query-tabs { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.query-tab {
  padding: 8px 16px; border-radius: 8px; border: 1.5px solid var(--border-strong);
  background: var(--bg); cursor: pointer; font-size: 14px; color: var(--muted);
  font-family: var(--sans); transition: all .15s;
}
.query-tab.active { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.query-panel { display: none; }
.query-panel.active { display: block; }

.recent-orders { margin-top: 8px; }
.recent-order {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 16px; border: 1px solid var(--border); border-radius: 9px;
  margin-bottom: 10px; text-decoration: none; color: var(--text);
  transition: border-color .15s, box-shadow .15s;
}
.recent-order:hover { border-color: var(--border-strong); box-shadow: 0 2px 8px rgba(0,0,0,0.05); text-decoration: none; }
.recent-order .ro-no { font-family: var(--mono); font-size: 13px; }
.recent-order .ro-meta { font-size: 12px; color: var(--muted); margin-top: 3px; }
.recent-order .ro-status { font-size: 12px; padding: 3px 10px; border-radius: 999px; }
.ro-status.delivered { color: var(--ok); background: #f0fdf4; }
.ro-status.pending { color: var(--pending); background: #fffbeb; }
.ro-status.expired { color: var(--muted); background: var(--surface-2); }
.empty-hint { text-align: center; color: var(--muted); font-size: 14px; padding: 32px 0; }