:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-soft: #eef4ff;
  --surface-strong: #0f172a;
  --text: #102033;
  --muted: #5b6b80;
  --line: #d8e2ef;
  --brand: #0a84ff;
  --brand-deep: #0766c8;
  --brand-soft: #d9ecff;
  --accent: #19b3a6;
  --accent-soft: #dff9f6;
  --warm: #fff3dd;
  --danger-soft: #ffe8e8;
  --success: #12805c;
  --shadow: 0 18px 40px rgba(18, 42, 76, 0.08);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(10, 132, 255, 0.08), transparent 30%),
    linear-gradient(180deg, #f7fbff 0%, #f4f7fb 44%, #eef4fb 100%);
  line-height: 1.65;
}

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

button {
  font: inherit;
}

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

.container {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(16px);
  background: rgba(247, 251, 255, 0.88);
  border-bottom: 1px solid rgba(216, 226, 239, 0.9);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 78px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #5c7cff 0%, #8d4dff 34%, #d543b1 68%, #ff7b6b 100%);
  box-shadow: 0 14px 28px rgba(107, 88, 255, 0.26);
  color: #fff;
}

.brand-mark svg {
  width: 34px;
  height: 34px;
}

.brand-copy strong {
  display: block;
  font-size: 1.05rem;
  line-height: 1.2;
}

.brand-copy span {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.nav a {
  padding: 10px 16px;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 600;
  transition: 0.2s ease;
}

.nav a:hover,
.nav a.is-active {
  color: var(--brand-deep);
  background: var(--brand-soft);
}

.hero {
  padding: 52px 0 28px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 28px;
  align-items: stretch;
}

.panel,
.card,
.metric-box,
.quote,
.faq-item,
.table-card,
.step-card,
.story-card,
.compare-card,
.article-block,
.soft-banner,
.platform-card,
.version-card,
.notice-box {
  background: var(--surface);
  border: 1px solid rgba(216, 226, 239, 0.95);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 36px;
  position: relative;
  overflow: hidden;
}

.hero-copy::after {
  content: "";
  position: absolute;
  right: -30px;
  top: -30px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(25, 179, 166, 0.18), transparent 68%);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: #0c6f66;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 18px;
}

.eyebrow svg {
  width: 16px;
  height: 16px;
}

h1,
.h2,
.h3 {
  margin: 0;
  line-height: 1.15;
}

h1 {
  font-size: clamp(2.2rem, 4vw, 4.25rem);
  letter-spacing: -0.04em;
}

.hero-copy p.lead,
.section-lead {
  margin: 18px 0 0;
  font-size: 1.05rem;
  color: var(--muted);
}

.hero-actions,
.inline-actions,
.button-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.btn,
.download-btn,
.link-chip,
.secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 0;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn,
.download-btn {
  min-height: 52px;
  padding: 0 22px;
  border-radius: 16px;
  font-weight: 700;
}

.btn svg,
.download-btn svg,
.section-title svg,
.list-icon,
.info-icon,
.footer-icon,
.feature-icon,
.review-icon,
.mini-icon {
  width: 20px;
  height: 20px;
  flex: 0 0 auto;
}

.btn-primary,
.download-btn {
  background: linear-gradient(135deg, var(--brand) 0%, #35b2ff 100%);
  color: #fff;
  box-shadow: 0 12px 24px rgba(10, 132, 255, 0.22);
}

.btn-secondary {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--line);
}

.btn:hover,
.download-btn:hover,
.link-chip:hover,
.secondary-link:hover {
  transform: translateY(-2px);
}

.hero-side {
  padding: 28px;
  display: grid;
  gap: 16px;
  background:
    linear-gradient(180deg, rgba(10, 132, 255, 0.04), rgba(25, 179, 166, 0.08)),
    #ffffff;
}

.radar-card {
  padding: 22px;
  border-radius: 24px;
  background: linear-gradient(180deg, #0f2037 0%, #183455 100%);
  color: #e9f4ff;
}

.radar-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.radar-grid .mini {
  padding: 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.08);
}

.radar-grid strong,
.metric-box strong,
.stat strong,
.platform-top strong,
.kicker strong {
  display: block;
  font-size: 1.3rem;
  line-height: 1.15;
}

.radar-grid span,
.metric-box span,
.stat span,
.platform-top span,
.kicker span,
.quote small,
.meta-row span,
.download-hint,
.subtext,
.version-list li,
.footer-copy {
  color: rgba(233, 244, 255, 0.78);
}

.metric-strip {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.metric-box {
  padding: 18px;
}

.metric-box span {
  color: var(--muted);
}

main section {
  padding: 30px 0;
}

.section-head {
  margin-bottom: 20px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.section-head h2,
.section-head .h2 {
  font-size: clamp(1.7rem, 3vw, 2.7rem);
  letter-spacing: -0.03em;
}

.section-note {
  color: var(--muted);
  max-width: 620px;
}

.grid-3,
.grid-4,
.review-grid,
.faq-grid,
.compare-grid,
.article-grid,
.platform-grid,
.download-grid,
.tips-grid {
  display: grid;
  gap: 18px;
}

.grid-3,
.review-grid,
.compare-grid,
.article-grid,
.download-grid,
.tips-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

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

.card,
.story-card,
.compare-card,
.platform-card,
.step-card,
.version-card,
.article-block,
.notice-box,
.quote,
.faq-item {
  padding: 24px;
}

.card h3,
.story-card h3,
.compare-card h3,
.platform-card h3,
.step-card h3,
.version-card h3,
.article-block h3,
.notice-box h3,
.quote h3,
.faq-item h3 {
  margin: 12px 0 10px;
  font-size: 1.18rem;
}

.feature-icon,
.review-icon,
.mini-icon,
.info-icon,
.footer-icon {
  width: 22px;
  height: 22px;
}

.icon-badge {
  width: 52px;
  height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--brand-soft) 0%, #e8fbff 100%);
  color: var(--brand-deep);
}

.list {
  display: grid;
  gap: 12px;
  margin: 16px 0 0;
}

.list-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--muted);
}

.list-row svg {
  color: var(--accent);
  margin-top: 3px;
}

.soft-banner {
  padding: 26px;
  background: linear-gradient(135deg, #f7fcff 0%, #eef8ff 58%, #f4fffe 100%);
}

.soft-banner strong {
  font-size: 1.4rem;
  display: block;
  margin-bottom: 6px;
}

.quote {
  position: relative;
}

.quote::before {
  content: "";
  position: absolute;
  top: 24px;
  right: 24px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--brand-soft);
}

.quote p {
  position: relative;
  margin: 0 0 16px;
}

.quote small {
  color: var(--muted);
}

.faq-item {
  background: linear-gradient(180deg, #ffffff 0%, #f9fbfe 100%);
}

.faq-item h3 {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.q-badge {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand-deep);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.92rem;
  flex: 0 0 auto;
}

.table-card {
  overflow: hidden;
}

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

.table-card th,
.table-card td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.table-card th {
  background: #f7fbff;
  font-size: 0.95rem;
}

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

.step-no {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-soft);
  color: var(--brand-deep);
  font-weight: 800;
  margin-bottom: 14px;
}

.download-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: 20px;
}

.notice-box.is-windows {
  background: linear-gradient(145deg, #0d67c5 0%, #1097df 100%);
  color: #fff;
}

.notice-box.is-windows p,
.notice-box.is-windows li,
.notice-box.is-windows .subtext,
.notice-box.is-windows .download-hint,
.notice-box.is-windows .meta-row span {
  color: rgba(255, 255, 255, 0.88);
}

.meta-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 16px 0 18px;
}

.meta-row span {
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.92rem;
}

.platform-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
}

.platform-top {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.platform-top .icon-badge {
  flex: 0 0 auto;
}

.platform-card .platform-top span,
.card p,
.story-card p,
.compare-card p,
.platform-card p,
.step-card p,
.version-card p,
.article-block p,
.notice-box p,
.soft-banner p,
.footer .copyright,
.footer .safety,
.kicker p,
.table-card td,
.table-card th,
.section-copy,
.bread,
.cta-box p {
  color: var(--muted);
}

.version-list,
.clean-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.version-list li,
.clean-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  color: var(--muted);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(260px, 0.9fr);
  gap: 22px;
}

.article-stack {
  display: grid;
  gap: 18px;
}

.side-column {
  display: grid;
  gap: 18px;
  align-content: start;
}

.kicker {
  padding: 22px;
  border-radius: 24px;
  background: linear-gradient(180deg, #10253d 0%, #17324f 100%);
  color: #fff;
  box-shadow: 0 18px 36px rgba(12, 28, 47, 0.26);
}

.keyword-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.link-chip,
.secondary-link {
  padding: 10px 14px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--line);
  color: var(--brand-deep);
  font-weight: 700;
}

.kicker .link-chip {
  color: #194a85;
  background: rgba(255, 255, 255, 0.98);
  border-color: rgba(255, 255, 255, 0.7);
  box-shadow: 0 8px 18px rgba(8, 20, 37, 0.14);
}

.kicker .link-chip:hover {
  color: #0f3d72;
  background: #ffffff;
}

.compare-card.good {
  border-color: #b6eddc;
  background: linear-gradient(180deg, #ffffff 0%, #f4fffb 100%);
}

.compare-card.normal {
  border-color: #ffe6b4;
  background: linear-gradient(180deg, #ffffff 0%, #fffaf0 100%);
}

.cta-box {
  padding: 30px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, #0a84ff 0%, #19b3a6 100%);
  color: #fff;
  box-shadow: 0 18px 34px rgba(10, 132, 255, 0.22);
}

.cta-box p {
  color: rgba(255, 255, 255, 0.88);
}

.cta-box .btn-secondary {
  border-color: rgba(255, 255, 255, 0.36);
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}

.footer {
  margin-top: 28px;
  padding: 28px 0 42px;
}

.footer-box {
  padding: 26px;
  border-radius: var(--radius-xl);
  background: #0f172a;
  color: #fff;
  box-shadow: 0 20px 44px rgba(9, 18, 34, 0.22);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 18px;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-nav a {
  padding: 8px 12px;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.82);
  background: rgba(255, 255, 255, 0.08);
}

.footer .safety {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 8px;
}

.footer .copyright {
  color: rgba(255, 255, 255, 0.66);
  font-size: 0.95rem;
}

.hero-downloads {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.download-entry {
  padding: 16px;
  border-radius: 20px;
  background: #f8fbff;
  border: 1px solid #dfe8f3;
}

.download-entry-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.download-entry strong {
  display: block;
}

.download-entry span {
  color: var(--muted);
  font-size: 0.94rem;
}

.bread {
  margin-bottom: 14px;
  font-size: 0.94rem;
}

.badge-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #eff7ff;
  color: #145394;
  padding: 9px 12px;
  border-radius: 999px;
  border: 1px solid #d4e8ff;
  font-size: 0.92rem;
  font-weight: 700;
}

.highlight {
  color: var(--brand-deep);
}

.divider-space {
  height: 8px;
}

@media (max-width: 1080px) {
  .hero-grid,
  .download-hero,
  .article-layout,
  .grid-4,
  .platform-grid,
  .grid-3,
  .review-grid,
  .compare-grid,
  .article-grid,
  .download-grid,
  .tips-grid,
  .step-wrap {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 780px) {
  .topbar-inner,
  .section-head,
  .footer-top {
    align-items: flex-start;
  }

  .hero-grid,
  .download-hero,
  .article-layout,
  .grid-4,
  .platform-grid,
  .grid-3,
  .review-grid,
  .faq-grid,
  .compare-grid,
  .article-grid,
  .download-grid,
  .tips-grid,
  .step-wrap,
  .hero-downloads,
  .metric-strip {
    grid-template-columns: 1fr;
  }

  .hero-copy,
  .hero-side,
  .card,
  .story-card,
  .compare-card,
  .platform-card,
  .step-card,
  .version-card,
  .article-block,
  .notice-box,
  .quote,
  .faq-item,
  .soft-banner,
  .footer-box {
    padding: 20px;
  }

  h1 {
    font-size: 2.1rem;
  }

  .nav {
    gap: 6px;
  }

  .nav a,
  .footer-nav a,
  .link-chip,
  .secondary-link {
    font-size: 0.92rem;
  }

  .table-card {
    overflow-x: auto;
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}