/* 浅色清爽风 · 系统字体（站主红线：不引 webfont） */
:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --line: #e5eaf1;
  --line-strong: #d3dbe6;
  --txt: #131c28;
  --txt-2: #44536a;
  --dim: #7b8899;
  --brand: #2563eb;
  --brand-dark: #1d4ed8;
  --brand-soft: #eff4ff;
  --ok: #0d9f6e;
  --ok-soft: #e9f9f2;
  --warn: #c2740a;
  --warn-soft: #fdf4e3;
  --err: #d92d20;
  --err-soft: #fef1f0;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 12px 28px -18px rgba(16, 24, 40, .28);
  --radius: 14px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--txt);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", Roboto, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-dark); text-decoration: underline; text-underline-offset: 2px; }

h1, h2, h3, h4 { margin: 0 0 10px; line-height: 1.3; font-weight: 650; letter-spacing: -.01em; }
h1 { font-size: 30px; }
h2 { font-size: 19px; }
h3 { font-size: 16px; }
p { margin: 0 0 12px; }
p:last-child { margin-bottom: 0; }
code, .mono, pre { font-family: ui-monospace, SFMono-Regular, Consolas, "Courier New", monospace; }
code { background: var(--brand-soft); color: var(--brand-dark); padding: 1px 6px; border-radius: 5px; font-size: 13px; }
hr { border: 0; border-top: 1px solid var(--line); margin: 18px 0; }

/* ── 顶栏 ───────────────────────────── */
.top {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 20px;
  padding: 0 24px; height: 62px;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex; align-items: center; gap: 9px;
  color: var(--txt); font-weight: 700; font-size: 16px; letter-spacing: -.01em;
  white-space: nowrap;
}
.brand:hover { text-decoration: none; color: var(--txt); }
.brand .dot {
  width: 10px; height: 10px; border-radius: 3px;
  background: linear-gradient(135deg, #2563eb, #22c55e);
}
.brand em { color: var(--dim); font-style: normal; font-weight: 500; font-size: 12.5px; }
.top nav { display: flex; gap: 2px; flex: 1; flex-wrap: wrap; }
.top nav a {
  color: var(--txt-2); padding: 7px 13px; border-radius: 9px;
  font-size: 14px; font-weight: 500;
}
.top nav a:hover { background: #f1f5fa; color: var(--txt); text-decoration: none; }
.top nav a.on { background: var(--brand-soft); color: var(--brand-dark); }
.acct { display: flex; align-items: center; gap: 9px; }
.acct .mail { color: var(--dim); font-size: 13px; max-width: 190px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

main { max-width: 1060px; margin: 0 auto; padding: 32px 24px 72px; }

/* ── 按钮 ───────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  background: var(--brand); color: #fff; border: 1px solid var(--brand);
  padding: 10px 18px; border-radius: 10px; font-size: 14px; font-weight: 600;
  font-family: inherit; cursor: pointer; transition: background .15s, transform .05s, box-shadow .15s;
  white-space: nowrap;
}
.btn:hover { background: var(--brand-dark); border-color: var(--brand-dark); color: #fff; text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.ghost { background: #fff; color: var(--txt-2); border-color: var(--line-strong); box-shadow: 0 1px 2px rgba(16,24,40,.04); }
.btn.ghost:hover { background: #f8fafc; color: var(--txt); border-color: #c3cede; }
.btn.sm { padding: 7px 13px; font-size: 13px; border-radius: 9px; }
.btn.tiny { padding: 4px 10px; font-size: 12.5px; border-radius: 8px; }
.btn.block { width: 100%; }

/* ── 卡片 ───────────────────────────── */
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; margin-bottom: 18px; box-shadow: var(--shadow);
}
.card.narrow { max-width: 460px; margin-left: auto; margin-right: auto; }
.card h2 { display: flex; align-items: center; gap: 8px; }
.card .sub { color: var(--dim); font-size: 13.5px; margin: -4px 0 16px; }

.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; margin-bottom: 18px; }
.grid3 .card { margin: 0; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; }
.grid2 .card { margin: 0; }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.btns { display: flex; gap: 8px; flex-wrap: wrap; }

/* ── 首页 hero ──────────────────────── */
.hero { padding: 26px 0 30px; max-width: 720px; }
.hero .tag {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--ok-soft); color: var(--ok); font-size: 12.5px; font-weight: 600;
  padding: 5px 11px; border-radius: 999px; margin-bottom: 16px;
}
.hero h1 { font-size: 38px; letter-spacing: -.025em; margin-bottom: 14px; }
.hero .lead { font-size: 17px; color: var(--txt-2); margin-bottom: 8px; }
.hero .lead b { color: var(--txt); font-weight: 650; }
.hero .sub { color: var(--dim); font-size: 14.5px; }
.cta { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 22px; }

/* ── 数字卡片 ───────────────────────── */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px 18px; box-shadow: var(--shadow);
}
.stat span { display: block; color: var(--dim); font-size: 12.5px; margin-bottom: 6px; font-weight: 500; }
.stat b { font-size: 22px; font-weight: 680; letter-spacing: -.02em; }
.stat b.ok { color: var(--ok); }
.stat b.warnc { color: var(--warn); }

/* ── 表格 ───────────────────────────── */
.tbl { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 14px; }
.tbl th, .tbl td { text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.tbl th { color: var(--dim); font-weight: 600; font-size: 12.5px; letter-spacing: .02em; background: #fbfcfe; }
.tbl th:first-child { border-top-left-radius: 10px; }
.tbl th:last-child { border-top-right-radius: 10px; }
.tbl tbody tr:hover { background: #fbfcfe; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl .num { text-align: right; font-variant-numeric: tabular-nums; }
.tbl .price-cell { font-weight: 650; color: var(--txt); }

/* ── 标签 ───────────────────────────── */
.pill {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 10px; border-radius: 999px; font-size: 12.5px; font-weight: 600;
  background: #f1f5fa; color: var(--txt-2); border: 1px solid transparent;
}
.pill.waiting { background: var(--warn-soft); color: var(--warn); }
.pill.received { background: var(--ok-soft); color: var(--ok); }
.pill.muted { background: #f1f5fa; color: var(--dim); }

/* ── 表单 ───────────────────────────── */
.form { display: flex; flex-direction: column; gap: 14px; }
.form.row { flex-direction: row; }
.form label { display: flex; flex-direction: column; gap: 7px; font-size: 13px; color: var(--txt-2); font-weight: 500; }
.form input[type=email], .form input[type=password], .form input[type=text],
.form input[type=tel], .form input:not([type]), .form select, .form textarea {
  background: #fff; border: 1px solid var(--line-strong); color: var(--txt);
  padding: 11px 13px; border-radius: 10px; font-size: 15px; font-family: inherit; width: 100%;
  transition: border-color .15s, box-shadow .15s;
}
.form input::placeholder { color: #a8b3c2; }
.form input:focus, .form select:focus, .form textarea:focus {
  outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(37, 99, 235, .14);
}
.form.row input { flex: 1; }
form + p, .form + p { margin-top: 16px; }
.form label > span { display: flex; align-items: center; gap: 6px; }
.form label > span b { color: var(--brand-dark); font-weight: 700; }
.check { flex-direction: row !important; align-items: center; gap: 8px !important; color: var(--txt-2); font-weight: 400; }
.check input { width: auto !important; }

/* ── 代码块 ─────────────────────────── */
.code {
  background: #0f172a; border: 1px solid #1e293b; border-radius: 10px; padding: 15px;
  overflow-x: auto; font-size: 13px; color: #d7e3f4; white-space: pre; line-height: 1.7;
}

/* ── 语义色 ─────────────────────────── */
.ok { color: var(--ok); }
.warnc { color: var(--warn); }
.dim { color: var(--dim); }
.small { font-size: 13px; }
.alert {
  border: 1px solid #fbd5d2; background: var(--err-soft); color: #a4251b;
  padding: 12px 14px; border-radius: 10px; font-size: 14px; margin-bottom: 14px;
}
.alert.ok { border-color: #bfe9d6; background: var(--ok-soft); color: #0a6f4e; }
.alert.warn { border-color: #f3ddae; background: var(--warn-soft); color: #8a5310; }

/* ── 页脚 ───────────────────────────── */
.foot {
  max-width: 1060px; margin: 0 auto; padding: 26px 24px 64px;
  border-top: 1px solid var(--line); color: var(--dim); font-size: 12.5px; line-height: 1.7;
}
.foot p { margin: 0 0 7px; }
.foot strong { color: var(--txt-2); font-weight: 600; }

/* ── 买号页 ─────────────────────────── */
.prod-group { margin-bottom: 20px; }
.prod-group-head { display: flex; align-items: baseline; gap: 10px; margin: 0 0 12px; }
.prod-group-head h3 { margin: 0; font-size: 17px; }
.prod-group-head span { color: var(--dim); font-size: 13px; }

.prod-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px; }
.prod {
  display: flex; flex-direction: column; gap: 14px;
  padding: 18px; border: 1px solid var(--line); border-radius: 14px;
  background: var(--card); box-shadow: var(--shadow);
  transition: border-color .15s, transform .12s;
}
.prod:hover { border-color: #c8d7ee; transform: translateY(-1px); }
.prod-info { display: flex; flex-direction: column; gap: 5px; }
.prod-info b { font-size: 16px; font-weight: 650; }
.prod-info .line-desc { color: var(--dim); font-size: 13px; }
.prod-act { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.prod .price { font-size: 24px; font-weight: 700; letter-spacing: -.02em; color: var(--txt); }
.prod .price small { font-size: 13px; font-weight: 500; color: var(--dim); margin-left: 2px; }

.phone-row { display: flex; align-items: center; gap: 12px; margin: 4px 0 2px; flex-wrap: wrap; }
.phone { font-size: 30px; font-weight: 700; letter-spacing: -.01em; font-variant-numeric: tabular-nums; }
.code-box {
  margin-top: 14px; padding: 16px; border-radius: 12px;
  background: #fbfcfe; border: 1px dashed var(--line-strong);
  min-height: 56px; display: flex; align-items: center; justify-content: center;
}
.order-card { border-color: #cfdfff; box-shadow: 0 1px 2px rgba(37,99,235,.06), 0 16px 34px -22px rgba(37,99,235,.45); }
.order-card h3 { display: flex; align-items: center; gap: 8px; font-size: 15px; color: var(--txt-2); font-weight: 600; }

.rule-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 10px; }
.rule {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 14px; border-radius: 11px; background: #fbfcfe; border: 1px solid var(--line);
  font-size: 13.5px;
}
.rule b { flex: 1; min-width: 0; font-weight: 500; color: var(--txt-2); }
.rule .v { font-weight: 650; white-space: nowrap; flex-shrink: 0; }

.step-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 26px; height: 26px; border-radius: 8px; background: var(--brand-soft);
  color: var(--brand-dark); font-size: 13px; font-weight: 700; margin-bottom: 10px;
}

/* ── 响应式 ─────────────────────────── */
@media (max-width: 720px) {
  .top { height: auto; padding: 10px 14px; gap: 10px; flex-wrap: wrap; }
  .top nav { order: 3; width: 100%; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; }
  .acct { margin-left: auto; }
  .acct .mail { display: none; }
  main { padding: 22px 14px 48px; }
  .hero { padding: 12px 0 22px; }
  .hero h1 { font-size: 27px; }
  .hero .lead { font-size: 15.5px; }
  .card { padding: 18px; border-radius: 12px; }
  .phone { font-size: 24px; }
  .prod .price { font-size: 21px; }
  .tbl { font-size: 13px; }
  .tbl th, .tbl td { padding: 10px 6px; }
  .foot { padding: 22px 14px 48px; }
}