/* 第4套·cn · 卡片栅格 Card Grid：浅底、圆角卡片、2–4 列 */
:root {
  --cg-bg: #f3f5f8;
  --cg-bg-soft: #eef1f5;
  --cg-card: #ffffff;
  --cg-ink: #1c2430;
  --cg-ink-strong: #121821;
  --cg-muted: #5b6573;
  --cg-line: #e4e8ee;
  --cg-line-strong: #d5dbe3;
  --cg-red: #d21f26;
  --cg-red-deep: #b0181e;
  --cg-red-soft: #fff1f2;
  --cg-ok: #1f7a4d;
  --cg-ok-bg: #e8f7ef;
  --cg-radius: 16px;
  --cg-radius-sm: 10px;
  --cg-shadow: 0 10px 28px rgba(28, 36, 48, 0.06);
  --cg-shadow-hover: 0 14px 32px rgba(28, 36, 48, 0.1);
  --cg-max: 1120px;
  --cg-sans: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
}

body {
  margin: 0;
  color: var(--cg-ink);
  background: var(--cg-bg);
  font-family: var(--cg-sans);
  font-size: 16.5px;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
}

img,
svg {
  max-width: 100%;
  display: inline-block;
  vertical-align: middle;
}

a {
  color: var(--cg-red);
  text-underline-offset: 0.16em;
}

a:hover {
  color: var(--cg-red-deep);
}

p {
  margin: 0 0 0.95rem;
}

h1,
h2,
h3 {
  color: var(--cg-ink-strong);
  line-height: 1.35;
  font-weight: 700;
}

h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.48rem, 2.8vw, 2.1rem);
}

h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.14rem, 2vw, 1.42rem);
}

h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}

ul,
ol {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
}

li + li {
  margin-top: 0.3rem;
}

table {
  width: 100%;
  border-collapse: collapse;
}

:focus-visible {
  outline: 2px solid var(--cg-red);
  outline-offset: 3px;
}

.cg-skip {
  position: absolute;
  left: -999px;
  top: 8px;
}

.cg-skip:focus {
  left: 12px;
  z-index: 50;
  background: var(--cg-ink-strong);
  color: #fff;
  padding: 8px 12px;
  text-decoration: none;
  border-radius: 8px;
}

.cg-head {
  background: var(--cg-card);
  border-bottom: 1px solid var(--cg-line);
  position: sticky;
  top: 0;
  z-index: 20;
}

.cg-head-bar {
  width: min(var(--cg-max), calc(100% - 2rem));
  margin: 0 auto;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.cg-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--cg-ink-strong);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.cg-brand:hover {
  color: var(--cg-red);
  text-decoration: none;
}

.cg-brand svg {
  width: 32px;
  height: 32px;
  color: var(--cg-red);
}

.cg-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.cg-nav a {
  color: var(--cg-muted);
  text-decoration: none;
  padding: 0.42rem 0.85rem;
  border-radius: 999px;
  font-size: 0.94rem;
}

.cg-nav a:hover {
  color: var(--cg-red);
  background: var(--cg-red-soft);
  text-decoration: none;
}

.cg-nav a.cg-on,
.cg-nav a[aria-current="page"] {
  background: var(--cg-red);
  color: #fff;
}

.cg-main {
  width: min(var(--cg-max), calc(100% - 2rem));
  margin: 1.4rem auto 2.4rem;
}

.cg-section {
  margin: 0 0 1.25rem;
}

.cg-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(240px, 0.7fr);
  gap: 1rem;
  align-items: stretch;
}

.cg-panel,
.cg-side {
  background: var(--cg-card);
  border: 1px solid var(--cg-line);
  border-radius: var(--cg-radius);
  box-shadow: var(--cg-shadow);
}

.cg-panel {
  padding: 1.45rem 1.5rem 1.4rem;
}

.cg-side {
  padding: 1.2rem 1.25rem 1.15rem;
}

.cg-kicker {
  margin: 0 0 0.5rem;
  color: var(--cg-red);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.cg-lede {
  font-size: 1.02rem;
  color: var(--cg-ink);
}

.cg-note {
  color: var(--cg-muted);
  font-size: 0.94rem;
}

.cg-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin: 0.85rem 0 1rem;
}

.cg-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.58rem 1.05rem;
  border-radius: 999px;
  border: 1px solid var(--cg-red);
  background: var(--cg-red);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
}

.cg-btn:hover {
  background: var(--cg-red-deep);
  border-color: var(--cg-red-deep);
  color: #fff;
  text-decoration: none;
}

.cg-btn svg {
  width: 16px;
  height: 16px;
}

.cg-btn-ghost {
  background: #fff;
  color: var(--cg-red);
}

.cg-btn-ghost:hover {
  background: var(--cg-red-soft);
  color: var(--cg-red-deep);
}

.cg-btn-block {
  width: 100%;
  justify-content: center;
}

.js-dl .btn-label {
  display: inline-block;
}

.cg-side h3 {
  margin-bottom: 0.65rem;
}

.cg-side-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.cg-side-list li {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.48rem 0;
  border-bottom: 1px solid var(--cg-line);
  font-size: 0.94rem;
}

.cg-side-list li:last-child {
  border-bottom: 0;
}

.cg-side-list span {
  color: var(--cg-muted);
}

.cg-side-list strong {
  color: var(--cg-ink-strong);
  font-weight: 600;
}

.cg-grid-2,
.cg-grid-3,
.cg-grid-4 {
  display: grid;
  gap: 0.9rem;
  margin: 0.85rem 0 1rem;
}

.cg-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.cg-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.cg-grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.cg-card {
  background: var(--cg-card);
  border: 1px solid var(--cg-line);
  border-radius: var(--cg-radius);
  box-shadow: var(--cg-shadow);
  padding: 1.05rem 1.1rem 0.95rem;
}

.cg-card:hover {
  box-shadow: var(--cg-shadow-hover);
}

.cg-card h3 {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.cg-card svg,
.cg-icon {
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  color: var(--cg-red);
}

.cg-card p:last-child {
  margin-bottom: 0;
}

.cg-card-meta {
  display: inline-block;
  margin-bottom: 0.45rem;
  padding: 0.12rem 0.5rem;
  border-radius: 999px;
  background: var(--cg-red-soft);
  color: var(--cg-red);
  font-size: 0.75rem;
  font-weight: 700;
}

.cg-table-wrap {
  overflow-x: auto;
  margin: 0.75rem 0 1rem;
  background: var(--cg-card);
  border: 1px solid var(--cg-line);
  border-radius: var(--cg-radius);
  box-shadow: var(--cg-shadow);
}

.cg-table th,
.cg-table td {
  padding: 0.62rem 0.75rem;
  border-bottom: 1px solid var(--cg-line);
  text-align: left;
  vertical-align: top;
}

.cg-table th {
  background: var(--cg-bg-soft);
  color: var(--cg-ink-strong);
  font-size: 0.88rem;
}

.cg-table tr:last-child td {
  border-bottom: 0;
}

.cg-steps {
  margin: 0.5rem 0 1rem;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  counter-reset: cgstep;
}

.cg-steps li {
  background: var(--cg-card);
  border: 1px solid var(--cg-line);
  border-radius: var(--cg-radius);
  box-shadow: var(--cg-shadow);
  padding: 0.95rem 1rem 0.85rem 3.1rem;
  position: relative;
  counter-increment: cgstep;
}

.cg-steps li::before {
  content: counter(cgstep);
  position: absolute;
  left: 0.9rem;
  top: 1rem;
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 50%;
  background: var(--cg-red-soft);
  color: var(--cg-red);
  font-size: 0.82rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.cg-reviews {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  margin: 0.85rem 0 1rem;
}

.cg-review {
  background: var(--cg-card);
  border: 1px solid var(--cg-line);
  border-radius: var(--cg-radius);
  box-shadow: var(--cg-shadow);
  padding: 1rem 1.1rem 0.9rem;
}

.cg-job {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--cg-red);
  font-size: 0.8rem;
  font-weight: 700;
}

.cg-faq {
  background: var(--cg-card);
  border: 1px solid var(--cg-line);
  border-radius: var(--cg-radius);
  box-shadow: var(--cg-shadow);
  padding: 1rem 1.1rem 0.85rem;
  margin: 0 0 0.75rem;
}

.cg-faq h3 {
  font-size: 1.02rem;
}

.cg-callout {
  margin: 0.9rem 0 0;
  padding: 0.85rem 1rem;
  background: var(--cg-red-soft);
  border-radius: var(--cg-radius-sm);
  color: var(--cg-ink);
}

.cg-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
  margin: 0.85rem 0 1rem;
}

.cg-stat {
  background: var(--cg-card);
  border: 1px solid var(--cg-line);
  border-radius: var(--cg-radius);
  box-shadow: var(--cg-shadow);
  padding: 0.95rem 1rem;
  text-align: center;
}

.cg-stat strong {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--cg-red);
  font-size: 1.35rem;
}

.cg-stat span {
  color: var(--cg-muted);
  font-size: 0.88rem;
}

.cg-foot {
  background: var(--cg-ink-strong);
  color: #d9dee6;
  padding: 1.25rem 0 1.4rem;
}

.cg-foot-inner {
  width: min(var(--cg-max), calc(100% - 2rem));
  margin: 0 auto;
}

.cg-safe {
  margin: 0 0 0.45rem;
  padding: 0.55rem 0.75rem;
  border-radius: var(--cg-radius-sm);
  background: var(--cg-ok-bg);
  color: var(--cg-ok);
  font-weight: 700;
}

.cg-legal {
  margin: 0;
  font-size: 0.88rem;
  color: #c5ccd6;
}

@media (max-width: 960px) {
  .cg-hero,
  .cg-grid-4,
  .cg-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cg-grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .cg-hero,
  .cg-grid-2,
  .cg-grid-3,
  .cg-grid-4,
  .cg-reviews,
  .cg-stats,
  .cg-steps {
    grid-template-columns: 1fr;
  }

  .cg-head-bar {
    flex-wrap: wrap;
    padding: 0.55rem 0 0.65rem;
  }

  h1 {
    font-size: 1.36rem;
  }

  .cg-panel,
  .cg-side {
    padding: 1.1rem 1rem 1.05rem;
  }
}

@media (max-width: 520px) {
  body {
    font-size: 16px;
  }

  .cg-nav a {
    padding: 0.34rem 0.62rem;
    font-size: 0.88rem;
  }

  .cg-btn {
    padding: 0.52rem 0.85rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}

@media print {
  body {
    background: #fff;
    color: #111;
  }

  .cg-head,
  .cg-foot,
  .cg-btn,
  .cg-card {
    break-inside: avoid;
  }

  .cg-head {
    position: static;
  }
}