:root {
  --bg: #0a0e17;
  --panel: #121826;
  --border: #1e2b3d;
  --text: #e6edf3;
  --text-dim: #8b97a7;
  --primary: #4f7cff;
  --accent: #25d6c4;
  --gradient: linear-gradient(135deg, #4f7cff 0%, #25d6c4 100%);
  --gradient-text: linear-gradient(135deg, #7eb8ff 0%, #25d6c4 50%, #a78bfa 100%);
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
}

/* 星空背景 */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(1px 1px at 10% 20%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 30% 50%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1.5px 1.5px at 50% 10%, rgba(255,255,255,0.5), transparent),
    radial-gradient(1px 1px at 70% 40%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 90% 80%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 20% 70%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1.5px 1.5px at 60% 90%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 80% 15%, rgba(255,255,255,0.3), transparent);
  pointer-events: none;
  z-index: 0;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; outline: none; font-family: inherit; }

/* ====== 顶栏 ====== */
.topbar {
  position: relative; z-index: 10;
  height: 68px;
  background: rgba(17, 22, 33, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 32px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
  width: 38px; height: 38px; border-radius: 10px;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 20px; color: #fff;
  box-shadow: 0 4px 20px rgba(79, 124, 255, 0.35);
}
.brand h1 { font-size: 19px; font-weight: 700; letter-spacing: 0.5px; }
.nav-links { display: flex; gap: 8px; align-items: center; }
.nav-links a, .nav-links button {
  padding: 8px 16px; border-radius: 8px; font-size: 14px;
  color: var(--text-dim); background: transparent; transition: all 0.2s;
}
.nav-links a:hover, .nav-links button:hover { color: var(--text); background: rgba(255,255,255,0.06); }
.nav-links .btn-primary {
  background: var(--gradient); color: #fff; font-weight: 600;
}
.nav-links .btn-primary:hover { opacity: 0.9; color: #fff; }

/* ====== 容器 ====== */
.container { position: relative; z-index: 1; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ====== Hero（首页） ====== */
.hero {
  text-align: center; padding: 100px 24px 60px;
}
.hero h2 {
  font-size: 52px; font-weight: 800; line-height: 1.25; margin-bottom: 20px;
}
.gradient-text { background: var(--gradient-text); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero p { font-size: 17px; color: var(--text-dim); max-width: 640px; margin: 0 auto 36px; line-height: 1.7; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ====== 按钮 ====== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: 12px; font-size: 16px; font-weight: 600;
  transition: all 0.25s; cursor: pointer; border: none;
}
.btn-primary { background: var(--gradient); color: #fff; box-shadow: 0 8px 24px rgba(79,124,255,0.3); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(79,124,255,0.45); }
.btn-outline { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
/* Hero「立即充值」按钮：渐变描边 + 高亮，引导代理商充值 */
.btn-gradient {
  background: transparent; color: #fff;
  border: 2px solid transparent;
  background-image: linear-gradient(var(--bg-card), var(--bg-card)), var(--gradient);
  background-origin: border-box; background-clip: padding-box, border-box;
  box-shadow: 0 8px 24px rgba(37,214,196,0.25);
}
.btn-gradient:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(37,214,196,0.45); color: #fff; }

/* ====== 功能卡片 ====== */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; padding: 40px 0 80px; }
.feature-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 16px;
  padding: 32px 24px; text-align: center; transition: all 0.25s;
}
.feature-card:hover { transform: translateY(-4px); border-color: var(--primary); }
.feature-icon {
  width: 56px; height: 56px; border-radius: 14px; margin: 0 auto 18px;
  background: rgba(79,124,255,0.12); display: flex; align-items: center; justify-content: center; font-size: 26px;
}
.feature-card h3 { font-size: 17px; margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--text-dim); line-height: 1.6; }

/* ====== 卡片通用 ====== */
.card {
  background: var(--panel); border: 1px solid var(--border); border-radius: 16px; padding: 28px;
}
.section-title { font-size: 24px; font-weight: 700; margin-bottom: 24px; }

/* ====== 表单（登录/注册） ====== */
.auth-wrap {
  position: relative; z-index: 1;
  max-width: 440px; margin: 80px auto; padding: 0 24px;
}
.auth-card { background: var(--panel); border: 1px solid var(--border); border-radius: 20px; padding: 40px; }
.auth-card h2 { font-size: 26px; margin-bottom: 8px; }
.auth-card .sub { color: var(--text-dim); font-size: 14px; margin-bottom: 28px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 13px; color: var(--text-dim); margin-bottom: 8px; }
.form-group input {
  width: 100%; padding: 13px 16px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text); font-size: 15px; transition: border 0.2s;
}
.form-group input:focus { border-color: var(--primary); outline: none; }
.auth-card .btn { width: 100%; justify-content: center; margin-top: 8px; }
.auth-footer { text-align: center; margin-top: 20px; font-size: 14px; color: var(--text-dim); }
.auth-footer a { color: var(--primary); }

/* ====== 价格表 ====== */
.price-header { display: flex; justify-content: space-between; align-items: center; margin: 32px 0 20px; flex-wrap: wrap; gap: 12px; }
.price-table { width: 100%; border-collapse: collapse; }
.price-table th, .price-table td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.price-table th { color: var(--text-dim); font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: 0.5px; }
.price-table td { color: var(--text); }
.price-table tr:hover td { background: rgba(255,255,255,0.03); }
.badge { padding: 4px 10px; border-radius: 6px; font-size: 12px; font-weight: 600; }
.badge-supreme { background: rgba(167,139,250,0.15); color: #a78bfa; }
.badge-cost { background: rgba(37,214,196,0.15); color: var(--accent); }
.badge-stock { background: rgba(79,124,255,0.15); color: var(--primary); }
.empty-tip { text-align: center; color: var(--text-dim); padding: 60px 0; }

/* ====== 后台 ====== */
.admin-tabs { display: flex; gap: 8px; margin: 24px 0; border-bottom: 1px solid var(--border); padding-bottom: 0; }
.admin-tabs button {
  padding: 12px 20px; background: transparent; color: var(--text-dim); font-size: 15px; font-weight: 600;
  border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.admin-tabs button.active { color: var(--text); border-bottom-color: var(--primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.user-row { display: flex; justify-content: space-between; align-items: center; padding: 16px; border: 1px solid var(--border); border-radius: 12px; margin-bottom: 12px; }
.user-info { display: flex; flex-direction: column; gap: 4px; }
.user-info .name { font-weight: 600; }
.user-info .meta { font-size: 13px; color: var(--text-dim); }
.user-actions { display: flex; gap: 8px; }
.btn-sm { padding: 8px 16px; border-radius: 8px; font-size: 13px; font-weight: 600; }
.btn-approve { background: var(--accent); color: #04231f; }
.btn-reject { background: rgba(255,80,80,0.15); color: #ff6b6b; }

.price-edit-row { display: grid; grid-template-columns: 2fr 2fr 1fr 1fr auto; gap: 10px; margin-bottom: 10px; align-items: center; }
.price-edit-row input { padding: 10px 12px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg); color: var(--text); font-size: 14px; }
.btn-add { background: var(--primary); color: #fff; padding: 10px 18px; border-radius: 8px; font-size: 14px; font-weight: 600; margin-bottom: 16px; }
.btn-save-all { background: var(--gradient); color: #fff; padding: 12px 28px; border-radius: 10px; font-size: 15px; font-weight: 600; margin-top: 12px; }

/* ====== Toast ====== */
.toast {
  position: fixed; top: 90px; left: 50%; transform: translateX(-50%) translateY(-20px);
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 24px; font-size: 14px; z-index: 100; opacity: 0; transition: all 0.3s; pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { border-color: #ff6b6b; color: #ff6b6b; }
.toast.success { border-color: var(--accent); color: var(--accent); }

/* ====== 页脚 ====== */
.footer {
  position: relative; z-index: 1; text-align: center; padding: 40px 24px;
  border-top: 1px solid var(--border); color: var(--text-dim); font-size: 13px; margin-top: 60px;
}

/* ====== 收款方式 ====== */
.payment-channels { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; margin-bottom: 8px; }
.payment-channel {
  display: flex; align-items: center; gap: 14px;
  background: var(--bg); border: 1px solid var(--border); border-radius: 12px; padding: 16px;
}
.payment-channel .payment-icon { font-size: 28px; }
.payment-channel .payment-info { display: flex; flex-direction: column; gap: 3px; }
.payment-channel .payment-info strong { font-size: 14px; }
.payment-channel .payment-info span { font-size: 12px; color: var(--text-dim); word-break: break-all; }
.payment-notice {
  font-size: 13px; color: var(--text-dim); margin-top: 14px; padding: 12px 14px;
  background: rgba(79,124,255,0.08); border: 1px dashed var(--primary); border-radius: 10px; line-height: 1.6;
}
.payment-channels:empty + .payment-notice { display: none; }

/* 状态徽标补充 */
.badge-pending { background: rgba(255,180,0,0.15); color: #ffc857; }
.badge-rejected { background: rgba(255,80,80,0.15); color: #ff6b6b; }

.btn-outline {
  background: transparent; color: var(--text-dim); border: 1px solid var(--border);
  padding: 8px 16px; border-radius: 8px; font-size: 13px; font-weight: 600; cursor: pointer; transition: all 0.2s;
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

/* ====== 响应式 ====== */
@media (max-width: 900px) {
  .features { grid-template-columns: 1fr; }
  .hero h2 { font-size: 34px; }
  .price-edit-row { grid-template-columns: 1fr 1fr; }
  .topbar { padding: 0 16px; }
  .brand h1 { font-size: 16px; }
}