:root {
  --md-primary: #1a73e8;
  --md-on-primary: #ffffff;
  --md-primary-container: #d3e3fd;
  --md-on-primary-container: #041e49;
  --md-success: #188038;
  --md-success-container: #d8f5df;
  --md-warning: #f9ab00;
  --md-warning-container: #fff3c4;
  --md-background: #f8fafd;
  --md-surface: #ffffff;
  --md-surface-container-low: #f8fafd;
  --md-surface-container: #f1f3f4;
  --md-on-surface: #202124;
  --md-on-surface-variant: #5f6368;
  --md-outline: #dadce0;
  --md-outline-variant: #e8eaed;
  --shadow-1: 0 1px 2px rgba(60, 64, 67, 0.18), 0 1px 3px rgba(60, 64, 67, 0.12);
  --shadow-2: 0 4px 12px rgba(60, 64, 67, 0.14);
  font-family: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  margin: 0;
  background: var(--md-background);
  color: var(--md-on-surface);
  line-height: 1.7;
  letter-spacing: 0;
}
a { color: inherit; }
.container {
  width: min(960px, calc(100% - 40px));
  margin: 0 auto;
  padding: 42px 0 52px;
}
header {
  margin-bottom: 36px;
}
.top-row,
header .top-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.logo,
.back {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  color: var(--md-primary);
  font-size: 14px;
  font-weight: 760;
  text-decoration: none;
}
.logo:hover,
.back:hover,
footer a:hover { text-decoration: underline; }
.lang-switch {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--md-outline);
  border-radius: 999px;
  background: var(--md-surface);
}
.lang-switch button {
  min-height: 28px;
  padding: 0 10px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--md-on-surface-variant);
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  font-weight: 680;
}
.lang-switch button.active {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
}
header h1,
article h1 {
  margin: 18px 0 0;
  color: var(--md-on-surface);
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.08;
  letter-spacing: 0;
}
header p.subtitle,
.subtitle,
article .date {
  margin: 14px 0 0;
  color: var(--md-on-surface-variant);
  font-size: 15px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  border: 1px solid var(--md-outline);
  border-radius: 999px;
  background: var(--md-surface);
  color: var(--md-primary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 680;
  white-space: nowrap;
}
.btn:hover {
  background: var(--md-surface-container-low);
  border-color: var(--md-primary);
  text-decoration: none;
}
.btn--filled {
  border-color: var(--md-primary);
  background: var(--md-primary);
  color: var(--md-on-primary);
  box-shadow: var(--shadow-1);
}
.btn--filled:hover {
  background: #1558b0;
  color: var(--md-on-primary);
}
.post-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.post-card {
  min-height: 100%;
  padding: 18px;
  border: 1px solid var(--md-outline-variant);
  border-radius: 8px;
  background: var(--md-surface);
  box-shadow: var(--shadow-1);
}
.post-card:hover {
  border-color: var(--md-primary);
}
.post-card .date {
  margin: 0 0 10px;
  color: var(--md-on-surface-variant);
  font-size: 12px;
  font-weight: 680;
}
.post-card h2 {
  margin: 0 0 8px;
  color: var(--md-on-surface);
  font-size: 20px;
  line-height: 1.25;
}
.post-card h2 a {
  color: inherit;
  text-decoration: none;
}
.post-card h2 a:hover {
  color: var(--md-primary);
}
.post-card p.excerpt {
  margin: 0;
  color: var(--md-on-surface-variant);
  font-size: 14px;
}
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 9px;
  border-radius: 999px;
  background: var(--md-surface-container);
  color: var(--md-on-surface-variant);
  font-size: 12px;
  font-weight: 700;
}
article {
  max-width: 820px;
  margin: 0 auto;
}
article .date {
  margin-bottom: 34px;
}
article h2 {
  margin: 38px 0 12px;
  color: var(--md-on-surface);
  font-size: clamp(24px, 3vw, 32px);
  line-height: 1.2;
}
article h3 {
  margin: 28px 0 10px;
  color: var(--md-on-surface);
  font-size: 20px;
  line-height: 1.25;
}
article p {
  margin: 0 0 16px;
  color: var(--md-on-surface-variant);
  font-size: 16px;
}
article ul,
article ol {
  margin: 0 0 18px;
  padding-left: 24px;
  color: var(--md-on-surface-variant);
  font-size: 16px;
}
article li {
  margin: 8px 0;
}
article strong {
  color: var(--md-on-surface);
  font-weight: 760;
}
article em {
  color: var(--md-primary);
  font-style: normal;
  font-weight: 680;
}
article code {
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--md-surface-container);
  color: var(--md-primary);
  font-size: 14px;
}
.article-summary,
.article-cta,
.note {
  margin: 24px 0;
  padding: 18px;
  border: 1px solid var(--md-outline-variant);
  border-radius: 8px;
  background: var(--md-surface);
  box-shadow: var(--shadow-1);
}
.article-summary {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
}
.article-summary p,
.article-cta p,
.note p {
  margin-bottom: 0;
}
.article-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}
.comparison-table {
  width: 100%;
  margin: 22px 0;
  border-collapse: separate;
  border-spacing: 0;
  overflow: hidden;
  border: 1px solid var(--md-outline-variant);
  border-radius: 8px;
  background: var(--md-surface);
  box-shadow: var(--shadow-1);
}
.comparison-table th,
.comparison-table td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--md-outline-variant);
  color: var(--md-on-surface-variant);
  font-size: 14px;
  text-align: left;
  vertical-align: top;
}
.comparison-table th {
  background: var(--md-surface-container);
  color: var(--md-on-surface);
  font-weight: 760;
}
.comparison-table tr:last-child td {
  border-bottom: 0;
}
.best-for-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 22px 0;
}
.mini-card {
  padding: 16px;
  border: 1px solid var(--md-outline-variant);
  border-radius: 8px;
  background: var(--md-surface);
  box-shadow: var(--shadow-1);
}
.mini-card h3 {
  margin-top: 0;
}
.blog-engagement {
  max-width: 820px;
  margin: 34px auto 0;
  padding: 18px;
  border: 1px solid var(--md-outline-variant);
  border-radius: 8px;
  background: var(--md-surface);
  box-shadow: var(--shadow-1);
}
.blog-engagement__stats {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.blog-engagement__stat {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid var(--md-outline-variant);
  border-radius: 999px;
  background: var(--md-surface-container-low);
  color: var(--md-on-surface-variant);
  font-size: 13px;
  font-weight: 680;
}
.blog-like-button {
  min-height: 34px;
  padding: 0 14px;
  border: 1px solid var(--md-primary-container);
  border-radius: 999px;
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 760;
}
.blog-like-button:hover {
  border-color: var(--md-primary);
}
.blog-like-button.is-liked {
  border-color: var(--md-primary);
  background: var(--md-primary);
  color: var(--md-on-primary);
}
.blog-engagement h2 {
  margin: 0 0 12px;
  color: var(--md-on-surface);
  font-size: 24px;
  line-height: 1.2;
}
.blog-comment-list {
  display: grid;
  gap: 10px;
  margin: 0 0 18px;
}
.blog-comment {
  padding: 12px;
  border: 1px solid var(--md-outline-variant);
  border-radius: 8px;
  background: var(--md-surface-container-low);
}
.blog-comment__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 6px;
  color: var(--md-on-surface-variant);
  font-size: 12px;
  font-weight: 680;
}
.blog-comment p {
  margin: 0;
  color: var(--md-on-surface);
  font-size: 14px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
.blog-comment-empty {
  margin: 0 0 18px;
  color: var(--md-on-surface-variant);
  font-size: 14px;
}
.blog-comment-form {
  display: grid;
  gap: 10px;
}
.blog-comment-form__row {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 10px;
}
.blog-comment-field {
  display: grid;
  gap: 6px;
  color: var(--md-on-surface-variant);
  font-size: 12px;
  font-weight: 680;
}
.blog-comment-field span {
  line-height: 1.2;
}
.blog-comment-form input,
.blog-comment-form textarea {
  width: 100%;
  border: 1px solid var(--md-outline);
  border-radius: 8px;
  background: var(--md-surface);
  color: var(--md-on-surface);
  font: inherit;
  font-size: 14px;
}
.blog-comment-form input {
  min-height: 42px;
  padding: 0 12px;
}
.blog-comment-form textarea {
  min-height: 96px;
  resize: vertical;
  padding: 10px 12px;
}
.blog-comment-form [name="website"] {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}
.blog-comment-form button {
  justify-self: start;
  min-height: 40px;
  padding: 0 18px;
  border: 1px solid var(--md-primary);
  border-radius: 999px;
  background: var(--md-primary);
  color: var(--md-on-primary);
  cursor: pointer;
  font: inherit;
  font-size: 14px;
  font-weight: 760;
}
.blog-comment-form button:disabled {
  cursor: not-allowed;
  opacity: 0.65;
}
.blog-comment-message {
  min-height: 20px;
  margin: 0;
  color: var(--md-on-surface-variant);
  font-size: 13px;
}
.blog-comment-message.is-error {
  color: #b3261e;
}
footer {
  margin-top: 64px;
  padding-top: 20px;
  border-top: 1px solid var(--md-outline-variant);
  color: var(--md-on-surface-variant);
  font-size: 13px;
}
footer a {
  color: var(--md-primary);
  font-weight: 680;
  text-decoration: none;
}

@media (max-width: 760px) {
  .container { width: min(100% - 28px, 960px); padding-top: 28px; }
  header h1,
  article h1 { font-size: clamp(32px, 11vw, 44px); }
  .post-list,
  .best-for-grid {
    grid-template-columns: 1fr;
  }
  .article-cta {
    align-items: flex-start;
    flex-direction: column;
  }
  .blog-comment-form__row {
    grid-template-columns: 1fr;
  }
  .hero-actions .btn,
  .article-cta .btn {
    width: 100%;
  }
  .comparison-table {
    display: block;
    overflow-x: auto;
  }
}