/* 微信通知服务 — 官网基础样式
   仅使用系统字体与内联 SVG，不依赖任何外部资源。 */

:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-2: #f1f3f6;
  --text: #14161a;
  --muted: #626b78;
  --border: #e4e7ec;
  --accent: #07c160;
  --accent-dark: #059b4d;
  --accent-soft: #e8f8ef;
  --danger: #d93b3b;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04), 0 12px 32px -12px rgba(16, 24, 40, .12);
  --wrap: 1080px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1114;
    --surface: #16191d;
    --surface-2: #1d2227;
    --text: #e9edf2;
    --muted: #99a3b0;
    --border: #262c33;
    --accent-soft: #10281c;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 16px 40px -18px rgba(0, 0, 0, .7);
  }
}

* { box-sizing: border-box; }

/* 作者样式里的 display 会覆盖 UA 的 [hidden]{display:none}，这里统一兜住。 */
[hidden] { display: none !important; }

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

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

a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; line-height: 1.25; letter-spacing: -.02em; font-weight: 650; }
p { margin: 0; }
img { max-width: 100%; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

/* ---------------------------------- 顶栏 ---------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-header .wrap { display: flex; align-items: center; gap: 28px; height: 64px; }

.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -.01em; }
.brand svg { display: block; }
.brand small { display: block; font-size: 11px; font-weight: 500; color: var(--muted); letter-spacing: .04em; }

.site-nav { display: flex; gap: 4px; margin-left: auto; }
.site-nav a {
  padding: 8px 12px;
  border-radius: 9px;
  font-size: 14.5px;
  color: var(--muted);
  transition: background .15s, color .15s;
}
.site-nav a:hover { background: var(--surface-2); color: var(--text); }
.site-nav a[aria-current="page"] { color: var(--text); background: var(--surface-2); }

/* ---------------------------------- 按钮 ---------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: var(--surface-2);
  color: var(--text);
  font: inherit;
  font-size: 14.5px;
  font-weight: 600;
  cursor: pointer;
  transition: transform .12s, background .15s, border-color .15s, opacity .15s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-ghost { background: transparent; border-color: var(--border); }
.btn-danger { background: transparent; border-color: var(--border); color: var(--danger); }
.btn[disabled] { opacity: .55; cursor: not-allowed; transform: none; }
.btn-sm { padding: 7px 12px; font-size: 13.5px; }

/* ---------------------------------- 首屏 ---------------------------------- */

.hero { padding: 84px 0 72px; }
.hero .wrap { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero h1 { font-size: clamp(30px, 4.4vw, 46px); }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero .lede { margin-top: 20px; font-size: 17px; color: var(--muted); max-width: 46ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 26px; font-size: 13.5px; color: var(--muted); }
.hero-meta span { display: inline-flex; align-items: center; gap: 6px; }

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 12px 5px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 600;
}
@media (prefers-color-scheme: dark) { .pill { color: var(--accent); } }

/* 代码卡 */
.code-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.code-card header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 12.5px;
  color: var(--muted);
}
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--border); }
.code-card pre {
  margin: 0;
  padding: 18px 16px;
  overflow-x: auto;
  font: 13px/1.75 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--text);
}
.code-card .ok { color: var(--accent); }

/* ---------------------------------- 通用段 --------------------------------- */

.section { padding: 68px 0; }
.section-alt { background: var(--surface); border-block: 1px solid var(--border); }
.section-head { max-width: 60ch; margin-bottom: 40px; }
.section-head h2 { font-size: clamp(24px, 3vw, 32px); }
.section-head p { margin-top: 12px; color: var(--muted); }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.section-alt .card { background: var(--bg); box-shadow: none; }
.card h3 { font-size: 16.5px; margin-bottom: 8px; }
.card p { color: var(--muted); font-size: 14.5px; }
.card .chip {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 16px;
  border-radius: 11px;
  background: var(--accent-soft);
  font-size: 19px;
}

/* 步骤 */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.step { position: relative; padding-top: 4px; }
.step::before {
  counter-increment: step;
  content: counter(step);
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 16px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
}
.step h3 { font-size: 16.5px; }
.step p { margin-top: 8px; color: var(--muted); font-size: 14.5px; }

/* 行动号召 */
.cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 34px 36px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--accent) 0%, #04996f 100%);
  color: #fff;
}
.cta h2 { font-size: 25px; }
.cta p { margin-top: 8px; opacity: .9; font-size: 15px; }
.cta .btn { background: #fff; color: #0b3d29; flex: none; }
.cta .btn:hover { background: #f0fff7; }

/* ---------------------------------- 文档 ---------------------------------- */

.page { padding: 56px 0 80px; }
.page-head { max-width: 62ch; margin-bottom: 40px; }
.page-head h1 { font-size: clamp(26px, 3.6vw, 38px); }
.page-head p { margin-top: 14px; color: var(--muted); font-size: 16.5px; }

.prose { max-width: 74ch; }
.prose h2 { font-size: 22px; margin: 44px 0 14px; scroll-margin-top: 84px; }
.prose h2:first-of-type { margin-top: 0; }
.prose h3 { font-size: 17px; margin: 26px 0 10px; }
.prose p { color: var(--muted); }
.prose p + p { margin-top: 12px; }
.prose ul { margin: 14px 0 0; padding-left: 22px; color: var(--muted); }
.prose li + li { margin-top: 8px; }
.prose strong { color: var(--text); font-weight: 650; }

.note {
  display: flex;
  gap: 12px;
  margin-top: 20px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  background: var(--surface);
  font-size: 14.5px;
  color: var(--muted);
}
.note b { color: var(--text); }

pre.code, code.inline {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
pre.code {
  margin: 18px 0 0;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.75;
  color: var(--text);
}
code.inline {
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--surface-2);
  font-size: 13.5px;
}

.table-wrap { margin-top: 20px; overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
th, td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: 13px; font-weight: 600; color: var(--muted); background: var(--surface-2); }
tbody tr:last-child td { border-bottom: 0; }
td code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 13.5px; }

/* 价格卡 */
.price-card {
  max-width: 480px;
  margin-top: 8px;
  padding: 34px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.price-card .amount { display: flex; align-items: baseline; gap: 8px; margin: 18px 0 6px; }
.price-card .amount b { font-size: 42px; letter-spacing: -.03em; }
.price-card .amount span { color: var(--muted); }
.price-card ul { margin: 22px 0 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.price-card li { display: flex; gap: 10px; font-size: 14.5px; color: var(--muted); }
.price-card li::before { content: "✓"; color: var(--accent); font-weight: 700; }

/* ---------------------------------- 页脚 ---------------------------------- */

.site-footer { padding: 44px 0; border-top: 1px solid var(--border); background: var(--surface); }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 20px; align-items: center; justify-content: space-between; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 18px; font-size: 14px; color: var(--muted); }
.site-footer nav a:hover { color: var(--text); }
.site-footer .copyright { font-size: 13.5px; color: var(--muted); }

/* --------------------------------- 响应式 --------------------------------- */

@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding: 56px 0 48px; }
  .grid, .steps { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .wrap { padding: 0 18px; }
  .site-header .wrap { height: auto; padding-block: 12px; flex-wrap: wrap; gap: 12px; }
  .site-nav { order: 3; width: 100%; margin-left: 0; overflow-x: auto; }
  .site-nav a { padding: 7px 10px; white-space: nowrap; }
  .grid, .steps { grid-template-columns: 1fr; }
  .cta { flex-direction: column; align-items: flex-start; padding: 28px 22px; }
  .section { padding: 52px 0; }
}