/* ============================================================
   USDT Pay — 深色科技风样式（零外链，原生 CSS）
   ============================================================ */
:root {
  --bg-0: #070B14;
  --bg-1: #0A0E17;
  --bg-2: #111827;
  --card: rgba(255, 255, 255, 0.045);
  --card-hover: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #F3F4F6;
  --muted: #9CA3AF;
  --faint: #6B7280;
  --green: #50AF95;
  --green-bright: #2B8A70;
  --gold: #F0B90B;
  --blue: #60A5FA;
  --red: #EF4444;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { min-height: 100%; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(1000px 500px at 85% -10%, rgba(80, 175, 149, 0.14), transparent 60%),
    radial-gradient(800px 400px at -10% 110%, rgba(240, 185, 11, 0.08), transparent 60%),
    linear-gradient(160deg, var(--bg-1) 0%, var(--bg-0) 55%, var(--bg-2) 100%);
  background-attachment: fixed;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: inherit; text-decoration: none; }

/* ---------- 顶部导航 ---------- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 28px;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.3px;
}
.nav-logo {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--green) 0%, var(--green-bright) 100%);
  display: grid;
  place-items: center;
  font-weight: 800;
  color: #04130E;
  font-size: 15px;
  box-shadow: 0 4px 18px rgba(80, 175, 149, 0.35);
}
.nav-brand .sub {
  font-size: 11px;
  color: var(--muted);
  font-weight: 400;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  display: block;
  line-height: 1;
  margin-top: 3px;
}
.nav-right { display: flex; align-items: center; gap: 14px; }
.nav-link {
  font-size: 13px;
  color: var(--muted);
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 9px;
  transition: all .2s ease;
}
.nav-link:hover { color: var(--text); border-color: var(--border-strong); background: var(--card-hover); }

/* ---------- 内容容器 ---------- */
.wrap {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 12px 28px 60px;
  flex: 1;
}

/* ---------- 卡片（玻璃拟态） ---------- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

/* ---------- 品牌横幅 ---------- */
.hero { text-align: center; padding: 34px 20px 26px; }
.hero h1 {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: linear-gradient(90deg, var(--green) 0%, #7DD6BE 45%, var(--gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero p { margin-top: 10px; color: var(--muted); font-size: 14px; line-height: 1.7; }
.hero .badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 16px;
  padding: 6px 14px;
  font-size: 12px;
  color: var(--green);
  background: rgba(80, 175, 149, 0.1);
  border: 1px solid rgba(80, 175, 149, 0.3);
  border-radius: 999px;
}
.badge-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse 1.8s infinite;
}
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .35; } }

/* ---------- 表单 ---------- */
.form-card { max-width: 460px; margin: 8px auto 0; padding: 30px 32px 32px; }
.form-card h2 { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.form-card .desc { font-size: 13px; color: var(--muted); margin-bottom: 22px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 12.5px; color: var(--muted); margin-bottom: 8px; }
.field .hint { font-size: 11.5px; color: var(--faint); margin-top: 6px; line-height: 1.5; }
.input {
  width: 100%;
  padding: 12px 14px;
  font-size: 14px;
  color: var(--text);
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid var(--border-strong);
  border-radius: 11px;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
}
.input:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(80, 175, 149, 0.18);
}
.input::placeholder { color: var(--faint); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 13px 18px;
  font-size: 15px;
  font-weight: 700;
  color: #04130E;
  background: linear-gradient(135deg, var(--green) 0%, var(--green-bright) 100%);
  border: none;
  border-radius: 11px;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .2s ease, filter .2s;
  box-shadow: 0 8px 24px rgba(80, 175, 149, 0.3);
}
.btn:hover { filter: brightness(1.08); transform: translateY(-1px); box-shadow: 0 10px 28px rgba(80, 175, 149, 0.4); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }
.btn.ghost {
  width: auto;
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--border-strong);
  box-shadow: none;
}
.btn.ghost:hover { background: var(--card-hover); box-shadow: none; }
.btn.ghost.active {
  color: var(--green);
  background: rgba(80, 175, 149, 0.12);
  border-color: rgba(80, 175, 149, 0.45);
  box-shadow: 0 0 0 3px rgba(80, 175, 149, 0.12);
}
.btn.ghost.danger {
  color: var(--red);
  border-color: rgba(239, 68, 68, 0.35);
}
.btn.ghost.danger:hover { background: rgba(239, 68, 68, 0.12); }
.btn.gold { background: linear-gradient(135deg, var(--gold) 0%, #C9970A 100%); box-shadow: 0 8px 24px rgba(240, 185, 11, 0.25); }
.btn.small { width: auto; padding: 8px 14px; font-size: 12.5px; font-weight: 600; }
.btn.simulate {
  color: var(--blue);
  background: rgba(96, 165, 250, 0.1);
  border: 1px solid rgba(96, 165, 250, 0.35);
  box-shadow: none;
}
.btn.simulate:hover { background: rgba(96, 165, 250, 0.2); box-shadow: none; }

.error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #FCA5A5;
  font-size: 13px;
  padding: 10px 14px;
  border-radius: 10px;
  margin-bottom: 16px;
}

/* ---------- 支付页 ---------- */
.pay-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 20px; margin-top: 16px; }
@media (max-width: 860px) { .pay-grid { grid-template-columns: 1fr; } }

.pay-main { padding: 28px 30px; }
.pay-side { padding: 24px 26px; display: flex; flex-direction: column; gap: 20px; }

.order-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.order-row .label { font-size: 12.5px; color: var(--muted); }
.order-row .order-no {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--faint);
  background: rgba(0,0,0,0.25);
  padding: 5px 10px;
  border-radius: 7px;
  letter-spacing: 0.5px;
}

.amount-box {
  margin-top: 26px;
  text-align: center;
  padding: 22px 16px;
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid var(--border);
}
.amount-box .cap { font-size: 12px; color: var(--muted); letter-spacing: 2px; text-transform: uppercase; }
.amount {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 52px;
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(90deg, #FFFFFF 20%, var(--gold) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.amount .cur { font-size: 22px; font-weight: 600; -webkit-text-fill-color: var(--green); margin-left: 6px; }
.amount-box .net { margin-top: 8px; font-size: 12px; color: var(--faint); }
.amount-box .net b { color: var(--muted); font-weight: 600; }

.countdown { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 12px; font-size: 12.5px; color: var(--muted); }
.countdown .timer { font-family: var(--mono); color: var(--gold); font-weight: 700; }

.address-block { margin-top: 22px; }
.address-block .head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.address-block .head .label { font-size: 12.5px; color: var(--muted); }
.address-box {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(0, 0, 0, 0.28);
  border: 1px dashed var(--border-strong);
  border-radius: 12px;
  padding: 12px 14px;
  cursor: pointer;
  transition: border-color .2s, background .2s;
}
.address-box:hover { border-color: var(--green); background: rgba(80, 175, 149, 0.06); }
.address-box .addr {
  flex: 1;
  font-family: var(--mono);
  font-size: 13.5px;
  color: var(--text);
  word-break: break-all;
  line-height: 1.5;
}
.copy-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--green);
  background: rgba(80, 175, 149, 0.12);
  border: 1px solid rgba(80, 175, 149, 0.35);
  border-radius: 9px;
  cursor: pointer;
  transition: all .2s;
}
.copy-btn:hover { background: rgba(80, 175, 149, 0.22); }
.copy-btn.copied { color: var(--gold); border-color: var(--gold); background: rgba(240, 185, 11, 0.12); }

.network-tip { margin-top: 14px; font-size: 12px; color: var(--faint); display: flex; gap: 8px; align-items: flex-start; }
.network-tip b { color: var(--red); font-weight: 600; }

/* 二维码 */
.qr-box { text-align: center; }
.qr-box .label { font-size: 12.5px; color: var(--muted); margin-bottom: 12px; }
.qr-canvas {
  display: inline-block;
  padding: 10px;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 0 0 1px var(--border), 0 12px 34px rgba(0,0,0,0.4);
}
.qr-canvas canvas, .qr-canvas img { display: block; width: 176px; height: 176px; border-radius: 8px; }

/* 步骤条 */
.steps { display: flex; flex-direction: column; gap: 12px; }
.step { display: flex; gap: 12px; align-items: flex-start; }
.step .num {
  width: 24px; height: 24px;
  flex-shrink: 0;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 12px; font-weight: 700;
  background: rgba(80, 175, 149, 0.15);
  color: var(--green);
  border: 1px solid rgba(80, 175, 149, 0.35);
}
.step .txt { font-size: 12.5px; color: var(--muted); line-height: 1.65; }
.step .txt b { color: var(--text); font-weight: 600; }

/* 状态条 */
.status-bar { margin-top: 24px; }
.status-bar .track {
  position: relative;
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}
.status-bar .fill {
  position: absolute; inset: 0;
  width: 8%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--green), var(--gold));
  transition: width .6s ease;
}
.status-bar .fill.done { width: 100%; }
.status-bar .labels { display: flex; justify-content: space-between; margin-top: 10px; }
.status-bar .labels span { font-size: 11.5px; color: var(--faint); text-align: center; }
.status-bar .labels span.on { color: var(--green); font-weight: 600; }
.status-bar .labels span.on.gold { color: var(--gold); }

/* 成功提示 */
.paid-box { margin-top: 24px; text-align: center; padding: 20px; border-radius: 14px; background: rgba(80, 175, 149, 0.1); border: 1px solid rgba(80, 175, 149, 0.35); }
.paid-box .big { font-size: 18px; font-weight: 700; color: var(--green); }
.paid-box .sub { font-size: 12.5px; color: var(--muted); margin-top: 6px; }
.expired-box { margin-top: 24px; text-align: center; padding: 20px; border-radius: 14px; background: rgba(239, 68, 68, 0.1); border: 1px solid rgba(239, 68, 68, 0.35); }
.expired-box .big { font-size: 16px; font-weight: 700; color: var(--red); }

/* 后台 */
.admin-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat { padding: 18px 20px; }
.stat .v { font-family: var(--mono); font-size: 26px; font-weight: 700; }
.stat .v.green { color: var(--green); }
.stat .v.gold { color: var(--gold); }
.stat .v.red { color: var(--red); }
.stat .l { font-size: 12px; color: var(--muted); margin-top: 4px; }

.table-card { padding: 10px 0; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
thead th {
  text-align: left;
  padding: 12px 14px;
  font-size: 11px;
  color: var(--faint);
  letter-spacing: 0.8px;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
tbody td { padding: 10px 14px; border-bottom: 1px solid rgba(255,255,255,0.045); vertical-align: middle; }
tbody td.mono { max-width: 220px; overflow: hidden; text-overflow: ellipsis; }
tbody tr:hover { background: var(--card-hover); }
.mono { font-family: var(--mono); }
.tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  font-size: 11.5px;
  font-weight: 600;
  border-radius: 999px;
}
.tag.pending { color: var(--blue); background: rgba(96, 165, 250, 0.12); border: 1px solid rgba(96,165,250,0.3); }
.tag.paid { color: var(--green); background: rgba(80, 175, 149, 0.12); border: 1px solid rgba(80,175,149,0.3); }
.tag.expired { color: var(--faint); background: rgba(255,255,255,0.06); border: 1px solid var(--border); }
.tag.manual { color: var(--gold); background: rgba(240,185,11,0.12); border: 1px solid rgba(240,185,11,0.3); }

.admin-toolbar { display: flex; gap: 10px; align-items: center; margin-bottom: 16px; flex-wrap: wrap; }
.admin-toolbar .filter { display: flex; gap: 8px; }
.admin-toolbar .search { flex: 1; min-width: 200px; }
.pager { display: flex; gap: 8px; justify-content: flex-end; padding: 14px 16px; align-items: center; }
.pager .info { font-size: 12px; color: var(--muted); }

/* 弹窗 */
.modal-mask {
  position: fixed; inset: 0;
  background: rgba(4, 8, 15, 0.7);
  backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 50;
  padding: 20px;
}
.modal-mask.show { display: flex; }
.modal {
  width: 100%;
  max-width: 520px;
  background: var(--bg-2);
  border: 1px solid var(--border-strong);
  border-radius: 16px;
  padding: 26px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.5);
  animation: pop .25s ease;
}
@keyframes pop { from { transform: scale(.96); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.modal h3 { font-size: 16px; font-weight: 700; margin-bottom: 16px; }
.modal .row { margin-bottom: 14px; }
.modal .row label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.modal .row .hint { display: block; font-size: 11px; color: var(--faint); margin-top: 5px; line-height: 1.5; }
.modal .actions { display: flex; gap: 10px; margin-top: 20px; justify-content: flex-end; }

/* 表单内联输入 */
.inline-form { display: flex; gap: 8px; align-items: center; }
.inline-form .input { flex: 1; }

/* 页脚安全提示 */
.foot {
  text-align: center;
  padding: 22px;
  font-size: 12px;
  color: var(--faint);
  border-top: 1px solid var(--border);
  margin-top: auto;
}

/* 微动效 */
@keyframes fadeUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
.fade-up { animation: fadeUp .5s ease both; }
.fade-up.d1 { animation-delay: .06s; }
.fade-up.d2 { animation-delay: .12s; }

.spin { display: inline-block; width: 14px; height: 14px; border: 2px solid rgba(80,175,149,.3); border-top-color: var(--green); border-radius: 50%; animation: rotate .7s linear infinite; }
@keyframes rotate { to { transform: rotate(360deg); } }

/* 登录页 */
.login-card { max-width: 380px; margin: 60px auto 0; padding: 32px; text-align: center; }
.login-card h2 { font-size: 20px; margin-bottom: 6px; }
.login-card .sub { font-size: 13px; color: var(--muted); margin-bottom: 24px; }

@media (max-width: 560px) {
  .nav { padding: 14px 18px; }
  .wrap { padding: 10px 16px 50px; }
  .hero h1 { font-size: 24px; }
  .amount { font-size: 40px; }
  .form-card { padding: 24px 20px; }
}