:root {
  --bg: #f3efe7;
  --surface: rgba(255, 255, 255, 0.8);
  --surface-strong: #fffdf9;
  --surface-dark: #0f1720;
  --surface-dark-soft: #162331;
  --text: #16202b;
  --muted: #4d6375;
  --line: rgba(22, 32, 43, 0.1);
  --primary: #1296db;
  --primary-dark: #0b73b7;
  --accent: #0ea5e9;
  --shadow-lg: 0 30px 80px rgba(16, 24, 40, 0.12);
  --shadow-md: 0 20px 45px rgba(16, 24, 40, 0.08);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --container: min(1180px, calc(100vw - 40px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans SC", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(18, 150, 219, 0.16), transparent 28%),
    radial-gradient(circle at right 15%, rgba(14, 165, 233, 0.12), transparent 20%),
    linear-gradient(180deg, #f7fbff 0%, #edf7ff 45%, #f8fbff 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
}

.container {
  width: var(--container);
  margin: 0 auto;
}

.site-shell {
  position: relative;
  overflow: clip;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(22, 32, 43, 0.06);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 84px;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 16px;
  overflow: hidden;
}

.brand-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-text {
  display: grid;
  gap: 2px;
}

.brand-text strong {
  font-size: 1rem;
}

.brand-text small {
  color: var(--muted);
  font-size: 0.8rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: #315a76;
  font-size: 0.95rem;
  font-weight: 500;
}

.nav a:hover,
.text-link:hover,
.footer-links a:hover {
  color: var(--primary);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.text-link {
  color: var(--muted);
  font-size: 0.95rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease,
    color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(135deg, var(--primary), #37b5f4);
  color: #fff;
  box-shadow: 0 18px 30px rgba(18, 150, 219, 0.18);
}

.button-primary:hover {
  box-shadow: 0 20px 36px rgba(18, 150, 219, 0.26);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(22, 32, 43, 0.08);
  color: var(--text);
}

.hero {
  padding: 64px 0 42px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(420px, 0.88fr);
  gap: 42px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.page-title {
  margin: 0;
  font-family: "Manrope", "Noto Sans SC", sans-serif;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.hero h1 {
  font-size: clamp(2.7rem, 5.5vw, 5.1rem);
  max-width: 11ch;
}

.hero-kicker {
  margin: 18px 0 0;
  color: #26404a;
  font-size: 1.08rem;
  font-weight: 700;
  line-height: 1.7;
}

.hero-text,
.section-heading p,
.feature-card p,
.split-copy > p,
.scenario-list p,
.timeline-item p,
.faq-list p,
.footer-copy,
.stats-grid p,
.scenario-board p {
  color: var(--muted);
  line-height: 1.8;
}

.hero-text {
  font-size: 1.05rem;
  max-width: 60ch;
  margin: 22px 0 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.hero-actions .button {
  gap: 10px;
}

.button-icon {
  width: 22px;
  height: 22px;
  object-fit: contain;
}

.hero-points {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.hero-points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: #234156;
}

.hero-points li::before {
  content: "";
  flex: 0 0 10px;
  width: 10px;
  height: 10px;
  margin-top: 0.45em;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #7dd3fc);
  box-shadow: 0 0 0 6px rgba(18, 150, 219, 0.12);
}

.hero-panel {
  position: relative;
  margin: 0;
}

.hero-shot-frame,
.feature-card,
.timeline-item,
.faq-list details,
.scenario-board article,
.stats-grid article {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-md);
}

.hero-shot-frame {
  padding: 16px;
  border-radius: 30px;
  background:
    radial-gradient(circle at top left, rgba(18, 150, 219, 0.1), transparent 28%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(245, 251, 255, 0.86));
  box-shadow: var(--shadow-lg);
}

.hero-shot-image {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 20px;
  border: 1px solid rgba(22, 32, 43, 0.08);
  background: #fff;
}

.hero-shot-caption {
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.92rem;
  text-align: center;
}

.trust-strip {
  padding: 18px 0 22px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.stats-grid article {
  padding: 22px;
  border-radius: 22px;
}

.stats-grid strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.02rem;
}

.section {
  padding: 92px 0;
}

.section-alt {
  background: rgba(255, 255, 255, 0.34);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 28px;
}

.section-heading h2,
.page-title {
  font-size: clamp(2rem, 4vw, 3.2rem);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.review-item {
  position: relative;
  padding: 30px 24px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.review-item::before,
.review-item::after {
  position: absolute;
  color: rgba(18, 150, 219, 0.14);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 4.2rem;
  line-height: 1;
  pointer-events: none;
}

.review-item::before {
  content: "“";
  top: 2px;
  left: 16px;
}

.review-item::after {
  content: "”";
  right: 16px;
  bottom: -24px;
}

.review-item.is-hidden {
  display: none;
}

.review-item p {
  position: relative;
  margin: 0;
  color: #234156;
  line-height: 1.8;
  z-index: 1;
}

.review-actions {
  display: flex;
  justify-content: center;
  margin-top: 28px;
}

.feature-card {
  padding: 28px;
  border-radius: var(--radius-lg);
}

.feature-card-accent {
  background:
    linear-gradient(180deg, rgba(232, 247, 255, 0.96), rgba(255, 255, 255, 0.78)),
    rgba(255, 255, 255, 0.74);
}

.feature-icon {
  display: inline-grid;
  place-items: center;
  min-width: 54px;
  height: 36px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(18, 150, 219, 0.1);
  color: var(--primary);
  font-family: "Manrope", sans-serif;
  font-weight: 800;
}

.feature-card h3,
.split-copy h2,
.timeline-item h3,
.scenario-list h3,
.scenario-board strong,
.faq-list summary {
  margin: 18px 0 10px;
}

.split-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 88px;
  align-items: start;
}

.version-layout {
  display: grid;
  gap: 36px;
}

.scenario-list {
  display: grid;
  gap: 22px;
  margin-top: 28px;
}

.info-list {
  display: grid;
  gap: 22px;
  margin-top: 28px;
}

.plain-list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.9;
}

.scenario-board {
  display: grid;
  gap: 18px;
}

.version-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.version-changelog {
  display: grid;
  gap: 16px;
}

.scenario-board article {
  padding: 28px;
  border-radius: var(--radius-lg);
}

.info-list article,
.version-grid article,
.download-card,
.contact-card {
  padding: 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-md);
}

.scenario-board span {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.scenario-board strong {
  display: block;
  margin: 0 0 8px;
  font-size: 1.18rem;
}

.info-list h2,
.info-list h3,
.version-changelog h2,
.version-grid strong {
  margin: 0 0 12px;
}

.version-grid span {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.version-grid strong {
  display: block;
  font-size: 1.18rem;
}

.version-grid p,
.version-changelog p,
.info-list p {
  color: var(--muted);
  line-height: 1.8;
}

.version-changelog ul {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
}

.version-changelog li {
  display: grid;
  gap: 10px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.version-changelog li:last-child {
  border-bottom: 1px solid var(--line);
}

.changelog-meta {
  display: grid;
  gap: 12px;
}

.changelog-meta strong {
  font-size: 1.05rem;
}

.changelog-meta time {
  color: var(--muted);
  font-size: 0.92rem;
}

.version-changelog p {
  margin: 0;
}

.download-alert,
.download-note,
.contact-card p {
  color: var(--muted);
  line-height: 1.8;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.download-card span,
.contact-card span {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.download-card h2,
.download-card h3,
.contact-card h2,
.contact-card h3,
.contact-block h2 {
  margin: 0 0 16px;
  font-size: 1.2rem;
}

.contact-block {
  padding: 0;
}

.contact-block span {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.download-card .button {
  margin: 18px 0 12px;
  gap: 10px;
}

.download-note {
  margin: 20px 0 0;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.timeline-item {
  position: relative;
  padding: 30px;
  border-radius: var(--radius-lg);
}

.timeline-item span {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), #38bdf8);
  color: #fff;
  font-family: "Manrope", sans-serif;
  font-weight: 800;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.news-card {
  display: flex;
  min-height: 280px;
  flex-direction: column;
  align-items: flex-start;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-md);
}

.news-card time {
  color: var(--muted);
  font-family: "Manrope", sans-serif;
  font-size: 0.88rem;
}

.news-card span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  margin-top: 14px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(18, 150, 219, 0.1);
  color: var(--primary);
  font-size: 0.84rem;
  font-weight: 700;
}

.news-card h2,
.news-card h3 {
  margin: 18px 0 10px;
  font-size: 1.18rem;
}

.news-card p {
  color: var(--muted);
  line-height: 1.8;
}

.news-card a {
  margin-top: auto;
  color: var(--primary);
  font-weight: 700;
}

.faq-layout {
  display: grid;
  gap: 18px;
}

.faq-heading {
  max-width: 760px;
}

.faq-list {
  display: grid;
  gap: 16px;
}

.faq-list h2 {
  margin: 18px 0 2px;
  color: var(--primary-dark);
  font-size: 1.28rem;
}

.faq-list h2:first-child {
  margin-top: 0;
}

.faq-list details {
  padding: 22px 24px;
  border-radius: 20px;
}

.faq-list summary {
  cursor: pointer;
  list-style: none;
  font-weight: 700;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list p {
  margin: 12px 0 0;
}

.contact-list {
  display: grid;
  gap: 18px;
}

.contact-list div {
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(22, 32, 43, 0.08);
}

.contact-list div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.contact-list strong {
  display: block;
  margin-bottom: 6px;
}

.contact-list p {
  margin: 0;
  overflow-wrap: anywhere;
}

.wechat-contact img {
  display: block;
  width: 148px;
  height: 148px;
  margin: 12px 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  object-fit: cover;
}

.publish-container,
.article-container {
  max-width: 860px;
}

.publish-form {
  display: grid;
  gap: 18px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-md);
}

.publish-form label {
  display: grid;
  gap: 8px;
  color: var(--text);
  font-weight: 700;
}

.publish-form input,
.publish-form textarea {
  width: 100%;
  border: 1px solid rgba(22, 32, 43, 0.14);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
  font: inherit;
  line-height: 1.7;
  outline: none;
  padding: 14px 16px;
}

.publish-form input:focus,
.publish-form textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(18, 150, 219, 0.12);
}

.publish-form textarea {
  resize: vertical;
}

.publish-message {
  margin-bottom: 18px;
  padding: 14px 16px;
  border-radius: 16px;
  font-weight: 700;
}

.publish-success {
  background: rgba(18, 150, 219, 0.1);
  color: var(--primary-dark);
}

.publish-error {
  background: rgba(220, 38, 38, 0.1);
  color: #b91c1c;
}

.article-date {
  display: inline-block;
  margin-top: 18px;
  color: var(--muted);
  font-family: "Manrope", sans-serif;
}

.article-content {
  margin-top: 34px;
  color: var(--text);
  line-height: 1.9;
}

.article-content h2,
.article-content h3,
.article-content h4 {
  margin: 32px 0 12px;
}

.article-content p,
.article-content ul {
  margin: 0 0 18px;
}

.article-content ul {
  padding-left: 22px;
}

.footer {
  padding: 36px 0 26px;
  border-top: 1px solid rgba(22, 32, 43, 0.08);
}

.footer-grid,
.footer-meta {
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--muted);
}

.footer-links span,
.footer-links a {
  line-height: 1.8;
}

.footer-meta {
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid rgba(22, 32, 43, 0.08);
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-subnav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid rgba(22, 32, 43, 0.08);
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 1100px) {
  .hero-grid,
  .split-grid,
  .faq-layout {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .review-grid,
  .stats-grid,
  .timeline,
  .version-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .topbar-inner,
  .nav,
  .topbar-actions,
  .footer-grid,
  .footer-meta,
  .footer-subnav {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding-top: 34px;
  }

  .hero-panel {
    min-height: auto;
  }

  .feature-grid,
  .review-grid,
  .stats-grid,
  .timeline,
  .download-grid,
  .news-grid,
  .version-grid {
    grid-template-columns: 1fr;
  }

  .nav {
    gap: 14px;
    flex-wrap: wrap;
  }

}

@media (max-width: 560px) {
  :root {
    --container: min(100vw - 24px, 100%);
  }

  .topbar-inner {
    min-height: 72px;
  }

  .button,
  .button-primary,
  .button-secondary {
    width: 100%;
  }

  .hero h1 {
    max-width: none;
  }

  .timeline-item,
  .feature-card,
  .scenario-board article,
  .hero-shot-frame {
    padding: 22px;
  }
}