:root {
  --bg: #fbfbfa;
  --fg: #1b1c1e;
  --muted: #6b7076;
  --line: #e6e5e2;
  --card: #ffffff;
  --accent: #1f6feb;
  --accent-ink: #0b4bbd;
  --ok: #e8f6ed;
  --ok-ink: #11703a;
  --bad: #fdecec;
  --bad-ink: #a11616;
  --add: #e6f7ea;
  --del: #fdeaea;
  --radius: 10px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1 { font-size: 1.85rem; line-height: 1.3; margin: 0 0 .5rem; letter-spacing: -.01em; }
h2 { font-size: 1.3rem; margin: 2rem 0 .75rem; }
h3 { font-size: 1.05rem; margin: 0 0 .6rem; }
h4 { font-size: .95rem; margin: 0 0 .4rem; }
p  { margin: .4rem 0; }

.muted { color: var(--muted); }
.tiny { font-size: .82rem; }
.center { text-align: center; }
.inline { display: inline; margin: 0; }
.grow { flex: 1 1 220px; }
.gap { gap: .6rem; }
.wrap { flex-wrap: wrap; }
.between { justify-content: space-between; }
.ellipsis { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 62ch; }

main { max-width: 980px; margin: 0 auto; padding: 1.5rem 1.25rem 4rem; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  max-width: 980px; margin: 0 auto; padding: .9rem 1.25rem;
  background: rgba(251,251,250,.88); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav nav { display: flex; align-items: center; gap: 1.1rem; }
.nav a { color: var(--fg); font-size: .93rem; }
.brand { display: flex; align-items: center; gap: .45rem; font-weight: 700; font-size: 1.02rem; }
.brand:hover { text-decoration: none; }
.dot {
  width: 9px; height: 9px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 4px rgba(31,111,235,.14);
}
button.link {
  background: none; border: 0; padding: 0; cursor: pointer;
  color: var(--fg); font: inherit; font-size: .93rem;
}
button.link:hover { color: var(--accent); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; padding: .58rem 1.05rem; border-radius: 8px;
  background: var(--accent); color: #fff; border: 1px solid var(--accent);
  font: inherit; font-size: .95rem; cursor: pointer; text-align: center;
}
.btn:hover { background: var(--accent-ink); border-color: var(--accent-ink); text-decoration: none; }
.btn.ghost { background: transparent; color: var(--fg); border-color: var(--line); }
.btn.ghost:hover { background: #f2f1ef; }
.btn.danger { background: transparent; color: var(--bad-ink); border-color: #f0cccc; }
.btn.danger:hover { background: var(--bad); }
.btn.sm { padding: .38rem .75rem; font-size: .86rem; }

/* ---------- 布局块 ---------- */
.hero { padding: 3.2rem 0 2rem; text-align: center; }
.hero h1 { font-size: 2.3rem; }
.hl { color: var(--accent); }
.lead { font-size: 1.06rem; color: var(--muted); max-width: 62ch; margin: .8rem auto 0; }
.cta { display: flex; gap: .7rem; justify-content: center; margin: 1.6rem 0 .5rem; }

.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: .9rem; margin: 2rem 0; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 1.6rem; align-items: start; margin: 2.6rem 0; }
.final { text-align: center; padding: 2.6rem 0 1rem; border-top: 1px solid var(--line); margin-top: 2.5rem; }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.15rem 1.2rem;
}
.card.quote p { font-size: 1.02rem; }
.card.empty { color: var(--muted); text-align: center; padding: 2rem; }
.card.inner { padding: .9rem; }

.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: .9rem; margin: 1.5rem 0; }
.plan { position: relative; display: flex; flex-direction: column; }
.plan .btn { margin-top: auto; }
.plan.featured { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(31,111,235,.09); }
.badge {
  position: absolute; top: -.6rem; right: .9rem;
  background: var(--accent); color: #fff; font-size: .72rem;
  padding: .1rem .5rem; border-radius: 999px;
}
.price { font-size: 1.7rem; font-weight: 700; margin: .2rem 0 .7rem; }
.price span { font-size: .85rem; font-weight: 400; color: var(--muted); }

.ticks { list-style: none; padding: 0; margin: .5rem 0 1rem; }
.ticks li { position: relative; padding-left: 1.25rem; margin: .3rem 0; font-size: .93rem; }
.ticks li::before {
  content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700;
}

.code { background: #14161a; color: #e8e9ea; border-radius: var(--radius); overflow: hidden; }
.codehead { font-size: .78rem; padding: .45rem .8rem; background: #1e2126; color: #9aa0a6; }
.code pre, pre.diff {
  margin: 0; padding: .9rem; overflow-x: auto; font-size: .82rem; line-height: 1.6;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  white-space: pre-wrap; word-break: break-word;
}
.code pre { color: #e8e9ea; }

pre.diff {
  background: #fbfbfa; border: 1px solid var(--line); border-radius: 8px;
  color: #2a2d31; margin: .6rem 0;
}
pre.diff .add { background: var(--add); display: inline-block; width: 100%; }
pre.diff .del { background: var(--del); display: inline-block; width: 100%; }

/* ---------- 列表 ---------- */
.list { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--card); }
.row { display: flex; align-items: center; gap: .9rem; }
.item { padding: .85rem 1rem; border-bottom: 1px solid var(--line); color: var(--fg); }
.item:last-child { border-bottom: 0; }
.item:hover { background: #f7f7f6; text-decoration: none; }
.item .name { font-weight: 600; font-size: .96rem; }
.meta { display: flex; flex-direction: column; align-items: flex-end; gap: .2rem; }

.pill { font-size: .75rem; padding: .1rem .5rem; border-radius: 999px; }
.pill.on { background: var(--ok); color: var(--ok-ink); }
.pill.off { background: #f1f0ee; color: var(--muted); }

.statrow { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: .6rem; margin: 1.2rem 0; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: .7rem .85rem; }
.stat .k { font-size: .76rem; color: var(--muted); }
.stat .v { font-weight: 600; font-size: .95rem; }

.event { margin-bottom: .7rem; }

/* ---------- 表单 ---------- */
.form { display: flex; flex-direction: column; gap: .8rem; }
.form label { display: flex; flex-direction: column; gap: .3rem; font-size: .88rem; color: var(--muted); }
input, select {
  font: inherit; font-size: .95rem; color: var(--fg);
  padding: .5rem .65rem; border: 1px solid var(--line); border-radius: 7px;
  background: #fff; width: 100%;
}
input:focus, select:focus { outline: 2px solid rgba(31,111,235,.28); border-color: var(--accent); }
input:disabled { background: #f5f5f4; color: #a8adb2; }
.form .btn { align-self: flex-start; }
.narrow { max-width: 430px; margin: 0 auto; }

.flash { padding: .6rem .9rem; border-radius: 8px; margin: .8rem 0; font-size: .9rem; }
.flash.ok { background: var(--ok); color: var(--ok-ink); }
.flash.bad { background: var(--bad); color: var(--bad-ink); }

code {
  background: #f2f1ef; padding: .1rem .35rem; border-radius: 4px;
  font-size: .86em; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

.faq details { border-top: 1px solid var(--line); padding: .7rem 0; }
.faq details:first-of-type { border-top: 0; }
.faq summary { cursor: pointer; font-weight: 600; font-size: .95rem; }

.foot {
  border-top: 1px solid var(--line); margin-top: 2rem; padding: 1.6rem 1.25rem;
  max-width: 980px; margin-left: auto; margin-right: auto;
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  font-size: .86rem;
}
.foot .muted a { color: var(--muted); margin-left: .9rem; }

@media (max-width: 720px) {
  .split { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.75rem; }
  main { padding: 1rem .9rem 3rem; }
  .ellipsis { max-width: 40ch; }
}

/* 法务页 */
.narrow.wide { max-width: 760px; }
.card.legal h2 { font-size: 1.05rem; margin: 1.4rem 0 .5rem; }
.card.legal h2:first-child { margin-top: 0; }
.card.legal p, .card.legal li { font-size: .93rem; }
.card.legal ul { padding-left: 1.2rem; }

/* 横向表单（控制台添加监控项）
   注意：不要给 form 同时加 .row —— .row 的 align-items:center 会把 label 压成
   内容宽度并居中，输入框会变成一条窄条。这里自己定义一套。 */
.form.hform {
  flex-direction: row;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: .7rem;
}
.form.hform label { flex: 1 1 200px; min-width: 150px; }
.form.hform label.grow { flex: 2 1 260px; }
.form.hform label.shrink { flex: 0 0 auto; min-width: 110px; }
.form.hform .btn { flex: 0 0 auto; white-space: nowrap; align-self: flex-end; }

@media (max-width: 720px) {
  .form.hform { flex-direction: column; align-items: stretch; }
  .form.hform label, .form.hform label.grow, .form.hform label.shrink { flex: 1 1 auto; min-width: 0; }
  .form.hform .btn { width: 100%; }
}