/* yoyoo 官网共享样式 —— 纯 HTML 站点，无框架依赖 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
:root {
  --primary: #1890ff;
  --primary-dark: #0b5fae;
  --teal: #009688;
  --text: #1f2d3d;
  --text-light: #5c6b7a;
  --bg-light: #f6f8fb;
  --border: #e5e9f0;
  --radius: 12px;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  color: var(--text);
  background: #fff;
  line-height: 1.6;
}
a {
  color: var(--primary);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* ===== 顶部导航 ===== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  height: 60px;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}
/* 沉浸式：滚动后上浮为浅色半透明毛玻璃（与 hero 渐变同色系，非纯白） */
.site-nav.scrolled {
  background: rgba(248, 251, 255, 0.72);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
  box-shadow: 0 1px 8px rgba(13, 27, 46, 0.03);
}
.site-nav .logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 18px;
  font-weight: 700;
}
.site-nav .logo img {
  height: 26px;
  width: auto;
  border-radius: 6px;
}
.site-nav .nav-links {
  display: flex;
  gap: 28px;
}
.site-nav .nav-links a {
  color: var(--text-light);
  font-size: 14px;
}
.site-nav .nav-links a:hover {
  color: var(--primary);
  text-decoration: none;
}
.site-nav .nav-links a.active {
  color: var(--primary);
  font-weight: 600;
}
/* 语言切换（中文页 ↔ 英文页）：点击记录选择（localStorage，之后不再自动跳转） */
.lang-switch {
  color: var(--text-light);
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  white-space: nowrap;
}
.lang-switch:hover {
  color: var(--primary);
  border-color: var(--primary);
  text-decoration: none;
}
/* GitHub 链接 */
.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-github {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--text-light);
  font-size: 13px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 12px;
  white-space: nowrap;
}
.nav-github:hover {
  color: var(--primary);
  border-color: var(--primary);
  text-decoration: none;
}
.nav-cta {
  background: linear-gradient(135deg, var(--primary), var(--teal));
  color: #fff;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
}
.nav-cta:hover {
  color: #fff;
  text-decoration: none;
  opacity: 0.92;
}
/* 汉堡菜单按钮（桌面隐藏，小屏显示） */
.nav-toggle {
  display: none;
  border: none;
  background: none;
  cursor: pointer;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle:hover {
  background: rgba(24, 144, 255, 0.08);
}
/* 打开态：三条杠变 ✕ */
.site-nav.nav-open .nav-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.site-nav.nav-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}
.site-nav.nav-open .nav-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ===== Hero ===== */
.hero {
  position: relative; /* 粒子 canvas 定位锚点 */
  background:
    radial-gradient(800px 400px at 20% 0%, rgba(24, 144, 255, 0.12), transparent 60%),
    radial-gradient(700px 400px at 85% 10%, rgba(0, 150, 136, 0.1), transparent 60%),
    linear-gradient(180deg, #f8fbff 0%, #f0f6ff 55%, #ffffff 100%);
  color: var(--text);
  padding: 96px 48px 80px;
  text-align: center;
}
.hero h1 {
  font-size: 46px;
  font-weight: 800;
  letter-spacing: 1px;
  line-height: 1.25;
}
.hero h1 .grad {
  background: linear-gradient(90deg, #1890ff, #009688);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero .subtitle {
  margin: 20px auto 0;
  max-width: 640px;
  color: var(--text-light);
  font-size: 17px;
}
.hero .cta-row {
  margin-top: 36px;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--teal));
  color: #fff;
}
.btn-primary:hover {
  color: #fff;
  text-decoration: none;
  opacity: 0.92;
}
.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-ghost:hover {
  color: var(--primary);
  text-decoration: none;
  border-color: var(--primary);
}
.hero .badges {
  margin-top: 40px;
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}
.hero .badges span {
  font-size: 12px;
  color: var(--text-light);
  background: rgba(24, 144, 255, 0.06);
  border: 1px solid var(--border);
  padding: 4px 14px;
  border-radius: 999px;
}

/* ===== Hero 粒子背景（仅 index.html，particles.js） ===== */
.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none; /* 不拦截按钮/链接点击 */
}
/* 内容盖在粒子层之上（canvas 无 z-index 负值，避免被 hero 背景盖住） */
.hero > *:not(.hero-canvas) {
  position: relative;
  z-index: 1;
}

/* ===== 通用区块 ===== */
.section {
  padding: 72px 48px;
  max-width: 1080px;
  margin: 0 auto;
}
.section-title {
  text-align: center;
  font-size: 30px;
  font-weight: 800;
  margin-bottom: 10px;
}
.section-desc {
  text-align: center;
  color: var(--text-light);
  margin-bottom: 44px;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}
.section-alt {
  /* 与普通区块统一为白底，区块间靠标题间距自然分隔 */
}

/* ===== 功能卡片 ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(24, 144, 255, 0.1);
}
.card .icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 14px;
  background: linear-gradient(135deg, rgba(24, 144, 255, 0.12), rgba(0, 150, 136, 0.12));
}
.card h3 {
  font-size: 17px;
  margin-bottom: 8px;
}
.card p {
  font-size: 14px;
  color: var(--text-light);
}

/* ===== 价格权益 ===== */
.plan-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  max-width: 960px;
  margin: 0 auto 44px;
}
.plan-card {
  position: relative;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px 26px;
  text-align: center;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.plan-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(24, 144, 255, 0.1);
}
.plan-card.plan-hot {
  border: 2px solid var(--primary);
  background: linear-gradient(180deg, #ffffff 0%, #f0f7ff 100%);
}
.plan-tag {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary), var(--teal));
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 14px;
  border-radius: 999px;
  white-space: nowrap;
}
.plan-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-light);
}
.plan-price {
  margin: 10px 0 4px;
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -1px;
}
.plan-card.plan-hot .plan-price {
  background: linear-gradient(90deg, var(--primary), var(--teal));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.plan-note {
  margin-left: 8px;
  font-size: 13px;
  font-weight: 400;
  color: var(--text-light);
  letter-spacing: 0;
}
.plan-features {
  margin: 18px 0 24px;
  text-align: left;
}
.price-table {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 13.5px;
}
.price-table th,
.price-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.price-table th:first-child,
.price-table td:first-child {
  text-align: left;
}
.price-table th {
  background: var(--bg-light);
  font-weight: 600;
}
.price-table tr:last-child td {
  border-bottom: none;
}
.price-table td:first-child {
  color: var(--text-light);
}
.price-table .col-gold {
  color: #b8860b;
  font-weight: 600;
}
.price-table th.col-platinum,
.price-table td.col-platinum {
  color: var(--primary);
  font-weight: 600;
  background: rgba(24, 144, 255, 0.04);
}
.plan-flow-note {
  margin-top: 16px;
  text-align: center;
  font-size: 13px;
  color: var(--text-light);
}
/* 私有化卡中性描边（区别于铂金高亮卡） */
.plan-card.plan-enterprise .plan-price {
  font-size: 34px;
  letter-spacing: 2px;
}

/* ===== Hero 截图（边缘虚化） ===== */
.hero-shot {
  margin: 56px auto 0;
  /* 与下方内容区块同宽（.section max-width 1080px），大屏不再无限拉伸 */
  max-width: 1080px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(13, 27, 46, 0.14);
  /* 边缘虚化：径向遮罩四周渐隐，融入深色 Hero 背景 */
  -webkit-mask-image: radial-gradient(ellipse 72% 72% at 50% 50%, #000 52%, transparent 100%);
  mask-image: radial-gradient(ellipse 72% 72% at 50% 50%, #000 52%, transparent 100%);
}
.hero-shot img {
  display: block;
  width: 100%;
  height: auto;
}

/* ===== 演示占位（旧 CSS 手绘版，保留备用） ===== */
.demo-window {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 24px 60px rgba(13, 27, 46, 0.12);
  background: #fff;
  margin-top: 56px;
  text-align: left;
}
.demo-window .bar {
  display: flex;
  gap: 6px;
  padding: 12px 16px;
  background: var(--bg-light);
}
.demo-window .bar i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}
.demo-window .bar i:nth-child(1) { background: #ff5f57; }
.demo-window .bar i:nth-child(2) { background: #febc2e; }
.demo-window .bar i:nth-child(3) { background: #28c840; }
.demo-window .body {
  padding: 20px;
  min-height: 220px;
  display: grid;
  grid-template-columns: 130px 1fr 170px;
  gap: 14px;
}
.demo-window .panel {
  border-radius: 10px;
  background: var(--bg-light);
  padding: 14px;
  font-size: 12px;
  color: var(--text-light);
}
.demo-window .canvas {
  position: relative;
  border-radius: 10px;
  background:
    radial-gradient(rgba(24, 144, 255, 0.18) 1px, transparent 1px) 0 0 / 18px 18px,
    #fafcff;
  min-height: 220px;
}
.demo-block {
  position: absolute;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  font-size: 12px;
  font-weight: 600;
}
.demo-line {
  position: absolute;
  height: 2px;
  background: #1890ff;
  transform-origin: left center;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-light);
  border-top: 1px solid var(--border);
  color: var(--text-light);
  padding: 36px 48px;
  text-align: center;
  font-size: 13px;
}
.site-footer a {
  color: var(--text);
}

/* ===== 首页四大特色图文展示 ===== */
/* 滚动入场（仅 index.html）：进入视口淡入上移；文字先出、截图 0.12s 后跟进 */
.showcase-item.reveal > * {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.showcase-item.reveal > *:last-child {
  transition-delay: 0.12s;
}
.showcase-item.reveal.visible > * {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .showcase-item.reveal > * {
    opacity: 1;
    transform: none;
    transition: none;
  }
}
.showcase {
  display: grid;
  gap: 72px;
}
.showcase-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.showcase-item.reverse .showcase-shot {
  order: -1;
}
.showcase-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  background: rgba(24, 144, 255, 0.1);
  border: 1px solid rgba(24, 144, 255, 0.25);
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.showcase-text h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 12px;
}
.showcase-text > p {
  font-size: 14.5px;
  color: var(--text-light);
}
.check-list {
  list-style: none;
  margin-top: 16px;
}
.check-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  color: var(--text);
  padding-top: 5px;
}
.check-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 4px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 400;
  opacity: 0.75;
}
.showcase-shot {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 18px 50px rgba(13, 27, 46, 0.14);
}
.showcase-shot img {
  display: block;
  width: 100%;
  height: auto;
}

/* ===== 内页章节配图（居中单图） ===== */
.section-shot {
  margin-top: 36px;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 18px 50px rgba(13, 27, 46, 0.12);
}
.section-shot img {
  display: block;
  width: 100%;
  height: auto;
}

/* ===== 页面头部（内页） ===== */
.page-head {
  /* 底部渐隐到白，与下方正文区域无缝衔接 */
  background: linear-gradient(180deg, #f8fbff 0%, #f0f6ff 55%, #ffffff 100%);
  color: var(--text);
  padding: 56px 48px;
  text-align: center;
}
.page-head h1 {
  font-size: 32px;
  font-weight: 800;
}
.page-head p {
  margin-top: 10px;
  color: var(--text-light);
}

/* ===== 上手步骤 ===== */
.steps {
  counter-reset: step;
  display: grid;
  gap: 18px;
}
.step {
  display: flex;
  gap: 18px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  counter-increment: step;
}
.step .num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--teal));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
}
.step h3 {
  font-size: 16px;
  margin-bottom: 6px;
}
.step p {
  font-size: 14px;
  color: var(--text-light);
}
.step code {
  background: #eef4fb;
  border-radius: 4px;
  padding: 1px 7px;
  font-size: 13px;
  color: var(--primary-dark);
  word-break: break-all;
}

/* ===== 更新日志 ===== */
.changelog {
  max-width: 760px;
  margin: 0 auto;
}
.log-item {
  position: relative;
  padding-left: 28px;
  padding-bottom: 30px;
  border-left: 2px solid var(--border);
}
.log-item:last-child {
  border-left-color: transparent;
}
.log-item::before {
  content: '';
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--teal));
}
.log-item .date {
  font-size: 13px;
  color: var(--text-light);
  font-weight: 600;
}
.log-item h3 {
  font-size: 17px;
  margin: 4px 0 8px;
}
.log-item ul {
  list-style: none;
}
.log-item li {
  font-size: 14px;
  color: var(--text-light);
  padding: 2px 0;
}
.log-item li::before {
  content: '•';
  color: var(--primary);
  font-weight: 700;
  margin-right: 8px;
}

/* ===== 快速上手：左目录右正文 ===== */
.guide-layout {
  display: grid;
  grid-template-columns: 235px 1fr;
  gap: 48px;
  max-width: 1080px;
  margin: 0 auto;
  padding: 48px 48px 72px;
  align-items: start;
}
.guide-toc {
  position: sticky;
  top: 84px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-height: calc(100vh - 110px);
  overflow: auto;
  padding-right: 4px;
}
.guide-toc a {
  padding: 7px 12px;
  border-radius: 8px;
  font-size: 13.5px;
  color: var(--text-light);
  line-height: 1.5;
}
.guide-toc a:hover {
  background: rgba(24, 144, 255, 0.06);
  color: var(--primary);
  text-decoration: none;
}
.guide-content {
  display: grid;
  gap: 18px;
  min-width: 0;
}
.guide-content .step {
  background: transparent;
  border: none;
  padding: 0;
  box-shadow: none;
}
.guide-content .step .num {
  display: none;
}
.guide-content .step p {
  font-size: 14.5px;
  color: var(--text);
  margin-top: 8px;
}
.guide-content .step .check-list li {
  margin-top: 2px;
}
/* 锚点跳转不被吸顶导航遮挡 */
.guide-content section {
  scroll-margin-top: 80px;
}
kbd {
  display: inline-block;
  padding: 1px 7px;
  font-size: 12px;
  font-family: inherit;
  background: #eef4fb;
  border: 1px solid #d6e4f5;
  border-bottom-width: 2px;
  border-radius: 5px;
  color: var(--primary-dark);
  white-space: nowrap;
}
.key-table {
  margin-top: 10px;
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 13.5px;
}
.key-table th,
.key-table td {
  text-align: left;
  padding: 9px 14px;
  border-bottom: 1px solid var(--border);
}
.key-table th {
  background: var(--bg-light);
  font-weight: 600;
}
.key-table tr:last-child td {
  border-bottom: none;
}
.key-table td:first-child {
  white-space: nowrap;
  color: var(--text-light);
}
.key-table td:last-child {
  white-space: nowrap;
}

/* ===== 联系客服弹窗 ===== */
.consult-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(13, 27, 46, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.consult-overlay[hidden] {
  display: none;
}
.consult-modal {
  position: relative;
  width: 100%;
  max-width: 420px;
  max-height: calc(100vh - 40px);
  overflow: auto;
  background: #fff;
  border-radius: 14px;
  padding: 28px 26px 24px;
  box-shadow: 0 24px 60px rgba(13, 27, 46, 0.25);
}
.consult-close {
  position: absolute;
  top: 12px;
  right: 14px;
  border: none;
  background: none;
  font-size: 22px;
  line-height: 1;
  color: var(--text-light);
  cursor: pointer;
  padding: 4px;
}
.consult-close:hover {
  color: var(--text);
}
.consult-modal h2 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 6px;
}
.consult-desc {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 18px;
}
.consult-modal label {
  display: block;
  margin-bottom: 14px;
}
.consult-modal label > span {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.consult-modal input[type='text'],
.consult-modal input[type='tel'],
.consult-modal textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 14px;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  outline: none;
  transition: border-color 0.15s ease;
}
.consult-modal input:focus,
.consult-modal textarea:focus {
  border-color: var(--primary);
}
.consult-modal textarea {
  resize: vertical;
  min-height: 72px;
}
/* 蜜罐字段：移出视口，人眼不可见 */
.consult-honeypot {
  position: absolute;
  left: -9999px;
  top: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}
.consult-msg {
  font-size: 13px;
  margin-bottom: 12px;
}
.consult-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 4px;
}
.consult-cancel,
.consult-submit {
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  padding: 9px 24px;
  cursor: pointer;
  font-family: inherit;
}
.consult-cancel {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
}
.consult-cancel:hover {
  color: var(--primary);
  border-color: var(--primary);
}
.consult-submit {
  border: none;
  background: linear-gradient(135deg, var(--primary), var(--teal));
  color: #fff;
}
.consult-submit:hover {
  opacity: 0.92;
}
.consult-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
/* 私有化卡上的联系客服按钮（a → button，补齐 button 重置） */
.consult-btn {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  cursor: pointer;
  font-family: inherit;
  padding: 12px 32px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
}
.consult-btn:hover {
  color: var(--primary);
  border-color: var(--primary);
}
/* 价格卡上的 CTA 按钮（a → button 的通用重置） */
.consult-cta {
  border: none;
  cursor: pointer;
  font-family: inherit;
}

/* ===== 升级付款弹窗 ===== */
.pay-modal {
  text-align: center;
}
.pay-qr {
  display: block;
  margin: 0 auto;
  width: 220px;
  height: 260px;
  object-fit: contain;
  border: 1px solid var(--border);
  border-radius: 10px;
}
.pay-note {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 10px;
}
.pay-note-red {
  color: #f5222d;
  font-weight: 600;
  margin-bottom: 0;
}
.pay-actions {
  justify-content: center;
  margin-top: 18px;
}

/* 中等屏：三卡收成 2+1（私有化卡占满一行） */
@media (max-width: 980px) {
  .plan-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .plan-grid .plan-card:last-child {
    grid-column: 1 / -1;
    justify-self: center;
    width: 100%;
    max-width: 480px;
  }
}
@media (max-width: 860px) {
  .card-grid,
  .plan-grid {
    grid-template-columns: 1fr;
  }
  .plan-grid .plan-card:last-child {
    grid-column: auto;
    max-width: none;
  }
  .showcase-item,
  .showcase-item.reverse {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .showcase-item.reverse .showcase-shot {
    order: 0;
  }
  .demo-window .body {
    grid-template-columns: 1fr;
  }
  .hero h1 {
    font-size: 34px;
  }
  .site-nav {
    padding: 0 16px;
  }
  .nav-toggle {
    display: flex;
  }
  /* 小屏：链接收进汉堡下拉面板 */
  .site-nav .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    display: none;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 24px rgba(13, 27, 46, 0.08);
    padding: 6px 16px 12px;
  }
  .site-nav.nav-open .nav-links {
    display: flex;
  }
  .site-nav .nav-links a {
    padding: 12px 8px;
    font-size: 15px;
    border-bottom: 1px solid var(--border);
  }
  .site-nav .nav-links a:last-child {
    border-bottom: none;
  }
  .nav-cta {
    padding: 7px 14px;
    font-size: 13px;
  }
  .section {
    padding: 48px 20px;
  }
  .guide-layout {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 32px 20px 56px;
  }
  .guide-toc {
    position: static;
    max-height: none;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px;
  }
  .guide-toc a {
    padding: 5px 10px;
    font-size: 13px;
    border: 1px solid var(--border);
    border-radius: 999px;
  }
  .key-table td:first-child,
  .key-table td:last-child {
    white-space: normal;
  }
}