/* WhatsApp Web 引导站 · 根目录 · 杂志/手册风 + 左侧粘滞目录 */
/* 前缀 .lite- ；禁止外部字体；动画仅限链接、按钮、导航高亮 */

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

html {
  scroll-behavior: auto;
}

body.lite-body {
  margin: 0;
  color: #111B21;
  background: #F0F2F5;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

img,
svg {
  max-width: 100%;
  display: block;
}

a {
  color: #075E54;
  text-decoration: none;
}

a:hover {
  color: #128C7E;
  text-decoration: underline;
}

.lite-skip {
  position: absolute;
  left: -999px;
}

.lite-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 42px;
  padding: 0 28px;
  background: #075E54;
  color: #F0F2F5;
  border-bottom: 3px solid #25D366;
}

.lite-topbar-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.08em;
}

.lite-topbar-mark svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.lite-topbar-note {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: #d1e7dd;
  white-space: nowrap;
}

.lite-shell {
  display: flex;
  align-items: flex-start;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 20px 48px;
}

.lite-toc {
  position: sticky;
  top: 58px;
  flex: 0 0 220px;
  width: 220px;
  max-height: calc(100vh - 80px);
  overflow: auto;
  padding: 28px 16px 28px 0;
  border-right: 1px solid #d5dbdf;
}

.lite-toc-label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: #128C7E;
  text-transform: uppercase;
}

.lite-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.lite-toc-list li {
  margin: 0;
  border-bottom: 1px dotted #c8d0d4;
}

.lite-toc-list a {
  display: block;
  padding: 10px 8px 10px 0;
  color: #111B21;
  font-size: 14px;
  line-height: 1.4;
}

.lite-toc-list a:hover,
.lite-toc-list a:focus-visible {
  color: #075E54;
  background: #e8f8ef;
  text-decoration: none;
  padding-left: 8px;
}

.lite-main {
  flex: 1 1 auto;
  min-width: 0;
  padding: 8px 0 0 40px;
}

.lite-hero {
  padding: 28px 0 36px;
  border-bottom: 2px solid #075E54;
  margin-bottom: 36px;
}

.lite-kicker {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: #128C7E;
}

.lite-hero h1 {
  margin: 0 0 18px;
  font-size: 34px;
  line-height: 1.28;
  font-weight: 650;
  color: #111B21;
}

.lite-lead {
  margin: 0 0 16px;
  font-size: 18px;
  color: #111B21;
}

.lite-hero p {
  margin: 0 0 16px;
  max-width: 46em;
}

.lite-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 8px 12px 8px 0;
  padding: 10px 18px;
  background: #25D366;
  color: #111B21;
  border: 1px solid #075E54;
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

.lite-btn:hover {
  background: #128C7E;
  color: #F0F2F5;
  text-decoration: none;
}

.lite-btn-ghost {
  background: transparent;
  color: #075E54;
}

.lite-btn-ghost:hover {
  background: #075E54;
  color: #F0F2F5;
}

.lite-section {
  padding: 8px 0 40px;
  margin-bottom: 8px;
  border-bottom: 1px solid #d8dee2;
}

.lite-section h2 {
  margin: 0 0 16px;
  font-size: 24px;
  line-height: 1.35;
  color: #075E54;
}

.lite-section h3 {
  margin: 24px 0 10px;
  font-size: 18px;
  color: #111B21;
}

.lite-section p {
  margin: 0 0 14px;
  max-width: 48em;
}

.lite-dl {
  margin: 20px 0 0;
}

.lite-dl dt {
  margin: 22px 0 8px;
  padding: 8px 0 8px 14px;
  border-left: 4px solid #25D366;
  font-size: 17px;
  font-weight: 650;
  color: #075E54;
}

.lite-dl dd {
  margin: 0 0 0 18px;
  padding: 0 0 4px;
}

.lite-dl dd p {
  margin: 0 0 12px;
}

.lite-callout {
  margin: 20px 0;
  padding: 16px 18px;
  background: #fff;
  border-left: 4px solid #128C7E;
}

.lite-callout p {
  margin: 0 0 8px;
}

.lite-callout p:last-child {
  margin-bottom: 0;
}

.lite-steps {
  margin: 16px 0;
  padding: 0;
  list-style: none;
  counter-reset: lite-step;
}

.lite-steps li {
  position: relative;
  margin: 0 0 16px;
  padding: 12px 12px 12px 56px;
  background: #fff;
  border: 1px solid #d8dee2;
  counter-increment: lite-step;
}

.lite-steps li::before {
  content: counter(lite-step);
  position: absolute;
  left: 12px;
  top: 14px;
  width: 28px;
  height: 28px;
  background: #075E54;
  color: #F0F2F5;
  font-size: 13px;
  font-weight: 700;
  line-height: 28px;
  text-align: center;
}

.lite-compare {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 20px;
  background: #fff;
  font-size: 14px;
}

.lite-compare th,
.lite-compare td {
  border: 1px solid #d8dee2;
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

.lite-compare th {
  background: #075E54;
  color: #F0F2F5;
  font-weight: 600;
}

.lite-compare tr:nth-child(even) td {
  background: #eef3f1;
}

.lite-faq {
  margin: 8px 0 0;
}

.lite-faq article {
  margin: 0 0 18px;
  padding: 0 0 16px;
  border-bottom: 1px dashed #c5cdcf;
}

.lite-faq h3 {
  margin: 0 0 8px;
  font-size: 17px;
  color: #111B21;
}

.lite-icon-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 16px 0 8px;
}

.lite-icon-note {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  flex: 1 1 240px;
  padding: 12px 0;
}

.lite-icon-note svg {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  color: #128C7E;
}

.lite-footer {
  background: #111B21;
  color: #F0F2F5;
  padding: 36px 28px 48px;
}

.lite-footer-inner {
  max-width: 1180px;
  margin: 0 auto;
}

.lite-footer h2 {
  margin: 0 0 12px;
  font-size: 16px;
  color: #25D366;
}

.lite-footer p {
  margin: 0 0 12px;
  max-width: 52em;
  font-size: 14px;
  line-height: 1.7;
}

.lite-footer a {
  color: #25D366;
}

.lite-footer a:hover {
  color: #F0F2F5;
}

.lite-legal {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid #2a3942;
  font-size: 13px;
  color: #c5cdcf;
}

button.lite-btn:hover {
  background: #128C7E;
  color: #F0F2F5;
}

@media (max-width: 960px) {
  .lite-shell {
    display: block;
    padding: 0 16px 36px;
  }

  .lite-toc {
    position: relative;
    top: 0;
    width: 100%;
    max-height: none;
    flex: none;
    padding: 16px 0;
    border-right: 0;
    border-bottom: 1px solid #d5dbdf;
  }

  .lite-toc-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0 12px;
  }

  .lite-toc-list li {
    border-bottom: 0;
  }

  .lite-main {
    padding: 12px 0 0;
  }

  .lite-hero h1 {
    font-size: 26px;
  }
}

@media (max-width: 640px) {
  .lite-topbar {
    padding: 8px 12px;
    flex-wrap: wrap;
  }

  .lite-hero {
    padding-top: 16px;
  }

  .lite-hero h1 {
    font-size: 22px;
  }

  .lite-lead {
    font-size: 16px;
  }

  .lite-section h2 {
    font-size: 20px;
  }

  .lite-compare {
    display: block;
    overflow-x: auto;
  }

  .lite-footer {
    padding: 28px 16px 36px;
  }
}

@media (max-width: 420px) {
  .lite-btn {
    width: 100%;
    justify-content: center;
  }

  .lite-dl dd {
    margin-left: 8px;
  }
}

/* WhatsApp nav lockup */
.wa-lockup{display:inline-flex;align-items:center;gap:8px;line-height:1;flex-shrink:0;}
.wa-lockup svg{display:block;flex-shrink:0;}
.wa-name{font-weight:700;letter-spacing:0.02em;text-transform:none;}
.lite-topbar .wa-name{color:#F0F2F5;font-size:16px;}.lite-toc-brand{margin:0 0 14px;}.lite-toc .wa-name{color:#111B21;font-size:15px;}