:root {
  --brand: #4f46e5;
  --sf-primary: var(--brand);
  --sf-primary-dark: color-mix(in srgb, var(--brand) 85%, #000);
  --sf-primary-soft: color-mix(in srgb, var(--brand) 12%, #fff);
  --sf-bg: #f4f6fb;
  --sf-card: #ffffff;
  --sf-border: #e6e8f0;
  --sf-text: #1f2937;
  --sf-text-2: #6b7280;
  --sf-text-3: #9ca3af;
  --sf-success: #16a34a;
  --sf-danger: #dc2626;
  --sf-warning: #d97706;
  --sf-info: #0284c7;
  --sf-radius: 14px;
  --sf-shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 8px 24px -12px rgba(16, 24, 40, .12);
  --sf-shadow-lg: 0 2px 4px rgba(16, 24, 40, .05), 0 16px 40px -16px rgba(16, 24, 40, .22);
}

* { box-sizing: border-box; }

body.sf-body {
  margin: 0;
  background: var(--sf-bg);
  color: var(--sf-text);
  font: 14px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--sf-primary); text-decoration: none; }
a:hover { color: var(--sf-primary-dark); }

.sf-container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* ---------- 顶栏 ---------- */
.sf-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--sf-border);
}
.sf-topbar-inner { display: flex; align-items: center; gap: 24px; height: 60px; }
.sf-brand { display: flex; align-items: center; gap: 10px; color: var(--sf-text); font-weight: 700; font-size: 16px; }
.sf-brand:hover { color: var(--sf-text); }
.sf-brand-img { height: 34px; width: auto; border-radius: 8px; }
.sf-brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: #fff; font-size: 13px; font-weight: 800; letter-spacing: .5px;
  box-shadow: 0 4px 10px -2px rgba(79, 70, 229, .5);
}
.sf-nav { display: flex; align-items: center; gap: 4px; flex: 1; }
.sf-nav a {
  padding: 8px 12px; border-radius: 9px; color: var(--sf-text-2);
  font-weight: 500; font-size: 14px; transition: all .15s;
}
.sf-nav a:hover { color: var(--sf-primary); background: var(--sf-primary-soft); }
.sf-nav a.active { color: var(--sf-primary); background: var(--sf-primary-soft); font-weight: 600; }
.sf-nav-right { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.sf-nav-right a { color: var(--sf-text-2); font-weight: 500; }
.sf-nav-right a:hover { color: var(--sf-primary); }

/* ---------- 按钮 ---------- */
.sf-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 18px; border: 1px solid transparent; border-radius: 10px;
  font-size: 14px; font-weight: 600; cursor: pointer; transition: all .15s;
  background: var(--sf-primary-soft); color: var(--sf-primary);
}
.sf-btn:hover { background: #e0e7ff; color: var(--sf-primary-dark); }
.sf-btn-primary { background: var(--sf-primary); color: #fff; box-shadow: 0 4px 12px -3px rgba(79, 70, 229, .55); }
.sf-btn-primary:hover { background: var(--sf-primary-dark); color: #fff; }
.sf-btn-ghost { background: #fff; border-color: var(--sf-border); color: var(--sf-text-2); box-shadow: none; }
.sf-btn-ghost:hover { border-color: var(--sf-primary); color: var(--sf-primary); background: #fff; }
.sf-btn-sm { padding: 5px 12px; font-size: 13px; border-radius: 8px; }
.sf-btn-lg { padding: 11px 22px; font-size: 15px; }
.sf-btn-block { width: 100%; }
.sf-btn:disabled { opacity: .6; cursor: not-allowed; }
.sf-btn-xs { padding: 3px 10px; font-size: 12px; border-radius: 7px; }

/* ---------- 卡片 ---------- */
.sf-card {
  background: var(--sf-card); border: 1px solid var(--sf-border);
  border-radius: var(--sf-radius); box-shadow: var(--sf-shadow);
}
.sf-card-head {
  padding: 16px 22px; border-bottom: 1px solid var(--sf-border);
  font-weight: 600; font-size: 15px;
}
.sf-card-body { padding: 22px; }
.sf-card-body-flush { padding: 0; }

/* ---------- 页面 ---------- */
.sf-main { flex: 1; padding: 28px 20px 40px; }
.sf-page-head { margin-bottom: 20px; }
.sf-page-head h1 { margin: 0; font-size: 22px; }
.sf-page-head p { margin: 4px 0 0; color: var(--sf-text-2); }
.sf-section { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; flex-wrap: wrap; gap: 12px; }
.sf-section h1 { margin: 0; font-size: 20px; }
.sf-section p { margin: 4px 0 0; color: var(--sf-text-2); }

/* ---------- 表单 ---------- */
.sf-form { display: flex; flex-direction: column; gap: 16px; }
.sf-field label { display: block; margin-bottom: 6px; font-weight: 500; font-size: 13px; color: var(--sf-text-2); }
.sf-field input[type="text"],
.sf-field input[type="password"],
.sf-field input[type="email"],
.sf-field input[type="number"],
.sf-field select {
  width: 100%; padding: 10px 14px; border: 1px solid var(--sf-border);
  border-radius: 10px; font-size: 14px; color: var(--sf-text); background: #fafbfe;
  outline: none; transition: all .15s;
}
.sf-field input:focus, .sf-field select:focus {
  border-color: var(--sf-primary); background: #fff;
  box-shadow: 0 0 0 3px rgba(79, 70, 229, .12);
}
.sf-field input::placeholder { color: var(--sf-text-3); }

.sf-choices { display: flex; flex-wrap: wrap; gap: 10px; }
.sf-choice {
  position: relative; display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px; border: 1px solid var(--sf-border); border-radius: 10px;
  background: #fff; cursor: pointer; font-size: 14px; transition: all .15s;
}
.sf-choice input { accent-color: var(--sf-primary); }
.sf-choice:hover { border-color: var(--sf-primary); }
.sf-choice.active { border-color: var(--sf-primary); background: var(--sf-primary-soft); color: var(--sf-primary); font-weight: 600; }

.sf-quick-btns { display: flex; flex-wrap: wrap; gap: 8px; }
.sf-quick-btns button {
  padding: 6px 16px; border: 1px dashed var(--sf-border); border-radius: 8px;
  background: #fff; color: var(--sf-text-2); cursor: pointer; font-size: 13px; transition: all .15s;
}
.sf-quick-btns button:hover { border-style: solid; border-color: var(--sf-primary); color: var(--sf-primary); }

.sf-form-actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- 消息 ---------- */
.sf-msg { display: none; padding: 10px 14px; border-radius: 10px; font-size: 13px; }
.sf-msg.show { display: block; }
.sf-msg-success { background: #f0fdf4; color: var(--sf-success); border: 1px solid #bbf7d0; }
.sf-msg-error { background: #fef2f2; color: var(--sf-danger); border: 1px solid #fecaca; }

/* ---------- 表格 ---------- */
.sf-table-wrap { overflow-x: auto; }
table.sf-table { width: 100%; border-collapse: collapse; }
.sf-table th, .sf-table td { padding: 12px 16px; text-align: left; white-space: nowrap; }
.sf-table thead th {
  background: #fafbfe; color: var(--sf-text-2); font-size: 12px; font-weight: 600;
  border-bottom: 1px solid var(--sf-border); letter-spacing: .02em;
}
.sf-table thead th:first-child { border-radius: 0; }
.sf-table tbody td { border-bottom: 1px solid #f1f2f7; font-size: 13.5px; }
.sf-table tbody tr:hover { background: #fafbff; }
.sf-table tbody tr:last-child td { border-bottom: none; }
.sf-mono { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 12.5px; }
.sf-empty { text-align: center; padding: 48px 16px; color: var(--sf-text-3); }

/* ---------- 徽标 ---------- */
.sf-badge {
  display: inline-flex; align-items: center; padding: 3px 10px;
  border-radius: 999px; font-size: 12px; font-weight: 600; line-height: 1.6;
}
.sf-badge-success { background: #f0fdf4; color: var(--sf-success); }
.sf-badge-danger { background: #fef2f2; color: var(--sf-danger); }
.sf-badge-warning { background: #fffbeb; color: var(--sf-warning); }
.sf-badge-info { background: #f0f9ff; color: var(--sf-info); }
.sf-badge-default { background: #f3f4f6; color: var(--sf-text-2); }

/* ---------- 分页 ---------- */
.sf-pager { display: flex; align-items: center; gap: 12px; padding: 14px 20px; }
.sf-pager a { padding: 6px 14px; border: 1px solid var(--sf-border); border-radius: 8px; color: var(--sf-text-2); font-size: 13px; }
.sf-pager a:hover { border-color: var(--sf-primary); color: var(--sf-primary); }
.sf-pager span { color: var(--sf-text-3); font-size: 13px; }

/* ---------- 认证页 ---------- */
.sf-auth { display: flex; justify-content: center; padding: 40px 0; }
.sf-auth-card { width: 100%; max-width: 420px; padding: 36px 32px; box-shadow: var(--sf-shadow-lg); }
.sf-auth-title { margin: 0; font-size: 22px; }
.sf-auth-sub { margin: 6px 0 22px; color: var(--sf-text-2); }
.sf-auth-foot { text-align: center; margin: 20px 0 0; color: var(--sf-text-2); font-size: 13px; }
.sf-auth .sf-msg { margin-bottom: 6px; }

/* ---------- 余额 ---------- */
.sf-balance-hero {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 28px 30px; border-radius: var(--sf-radius);
  background: linear-gradient(135deg, #6366f1 0%, #4f46e5 60%, #4338ca 100%);
  color: #fff; box-shadow: 0 12px 28px -10px rgba(79, 70, 229, .55);
  flex-wrap: wrap;
}
.sf-balance-label { font-size: 13px; opacity: .85; }
.sf-balance-amount { font-size: 34px; font-weight: 800; letter-spacing: .5px; margin-top: 2px; }
.sf-balance-actions { display: flex; gap: 10px; }
.sf-balance-actions .sf-btn-primary { background: #fff; color: var(--sf-primary); box-shadow: none; }
.sf-balance-actions .sf-btn-primary:hover { background: #eef2ff; color: var(--sf-primary-dark); }

.income { color: var(--sf-success); font-weight: 600; }
.expense { color: var(--sf-danger); font-weight: 600; }

/* ---------- 套餐 ---------- */
.sf-plan-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; }
.sf-plan-card {
  background: var(--sf-card); border: 1px solid var(--sf-border); border-radius: var(--sf-radius);
  box-shadow: var(--sf-shadow); overflow: hidden; display: flex; flex-direction: column;
  transition: transform .15s, box-shadow .15s;
}
.sf-plan-card:hover { transform: translateY(-3px); box-shadow: var(--sf-shadow-lg); }
.sf-plan-head { padding: 20px 22px 14px; border-bottom: 1px solid #f1f2f7; display: flex; align-items: flex-start; justify-content: space-between; gap: 8px; }
.sf-plan-head h2 { margin: 0; font-size: 17px; }
.sf-plan-tag { padding: 3px 9px; border-radius: 999px; background: var(--sf-primary-soft); color: var(--sf-primary); font-size: 12px; font-weight: 600; white-space: nowrap; }
.sf-plan-desc { padding: 14px 22px 4px; color: var(--sf-text-2); font-size: 13px; min-height: 20px; }
.sf-plan-spec { list-style: none; margin: 10px 0 0; padding: 0 22px; }
.sf-plan-spec li { display: flex; justify-content: space-between; padding: 7px 0; border-bottom: 1px dashed #f1f2f7; font-size: 13.5px; }
.sf-plan-spec li span { color: var(--sf-text-2); }
.sf-plan-spec li b { font-weight: 600; }
.sf-plan-price { display: flex; flex-wrap: wrap; gap: 8px; padding: 16px 22px; }
.sf-price-item { padding: 6px 12px; border: 1px solid var(--sf-border); border-radius: 9px; background: #fafbfe; }
.sf-price-label { color: var(--sf-text-2); font-size: 12px; margin-right: 6px; }
.sf-price-value { font-weight: 700; color: var(--sf-primary); }
.sf-plan-buy { padding: 4px 22px 20px; margin-top: auto; }
.sf-plan-buy .sf-btn { width: 100%; }

/* ---------- 复制 / 密码 ---------- */
.sf-icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 26px; height: 26px; margin: 0 2px; padding: 0; border: 1px solid var(--sf-border);
  border-radius: 7px; background: #fff; cursor: pointer; font-size: 13px; line-height: 1;
  color: var(--sf-text-2); transition: all .15s; vertical-align: middle;
}
.sf-icon-btn:hover { border-color: var(--sf-primary); color: var(--sf-primary); }
.sf-copy-text { cursor: pointer; color: var(--sf-info); border-bottom: 1px dashed #9ca3af; }
.sf-pass-revealed { color: var(--sf-text); }

/* ---------- 页脚 ---------- */
.sf-footer { border-top: 1px solid var(--sf-border); padding: 18px 0; color: var(--sf-text-3); font-size: 13px; text-align: center; background: #fff; }

/* ---------- 响应式 ---------- */
@media (max-width: 720px) {
  .sf-topbar-inner { height: auto; flex-wrap: wrap; padding: 10px 0; gap: 10px; }
  .sf-nav { order: 3; flex-basis: 100%; overflow-x: auto; }
  .sf-main { padding: 18px 14px 32px; }
  .sf-plan-grid { grid-template-columns: 1fr; }
  .sf-balance-amount { font-size: 28px; }
}