:root {
  --bg: #f5f8ff;
  --panel: rgba(255, 255, 255, 0.9);
  --panel-strong: #ffffff;
  --text: #15233b;
  --muted: #58657b;
  --line: rgba(21, 35, 59, 0.08);
  --blue: #2563eb;
  --cyan: #06b6d4;
  --amber: #f59e0b;
  --green: #16a34a;
  --shadow: 0 18px 50px rgba(37, 99, 235, 0.12);
  --radius: 24px;
  --wrap: 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 left, rgba(6, 182, 212, 0.12), transparent 28%),
    radial-gradient(circle at top right, rgba(245, 158, 11, 0.14), transparent 24%),
    linear-gradient(180deg, #f8fbff 0%, #eef4ff 52%, #f7faff 100%);
}

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

img {
  max-width: 100%;
}

button {
  font: inherit;
  border: 0;
  cursor: pointer;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(245, 248, 255, 0.82);
  border-bottom: 1px solid rgba(21, 35, 59, 0.08);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand-badge {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.16), rgba(6, 182, 212, 0.2));
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.12);
}

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

.nav-link {
  padding: 10px 16px;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 600;
}

.nav-link:hover,
.nav-link.active {
  color: var(--blue);
  background: rgba(37, 99, 235, 0.1);
}

.hero {
  padding: 42px 0 28px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 26px;
  align-items: stretch;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 34px;
  position: relative;
  overflow: hidden;
}

.hero-copy::after {
  content: "";
  position: absolute;
  inset: auto -80px -80px auto;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.18), transparent 68%);
}

.eyebrow,
.sec-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--blue);
  font-weight: 700;
  font-size: 13px;
}

.hero h1,
.page-hero h1 {
  margin: 16px 0 14px;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.08;
}

.hero p,
.page-hero p,
.lead {
  color: var(--muted);
  line-height: 1.8;
  font-size: 16px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin: 26px 0 20px;
}

.btn,
.cta-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 16px;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--blue), #3b82f6 55%, var(--cyan));
  box-shadow: 0 14px 28px rgba(37, 99, 235, 0.22);
}

.btn-secondary {
  color: var(--blue);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.12);
}

.hero-points,
.inline-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.point,
.mini-stat,
.metric,
.req-card,
.log-item,
.review,
.faq-item,
.compare-card,
.tip-card,
.sidebar-card,
.platform-card,
.feature-card,
.detail-card,
.install-step,
.platform-quick {
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: 22px;
}

.point {
  padding: 16px;
}

.point strong,
.metric strong,
.mini-stat strong {
  display: block;
  font-size: 22px;
  margin-bottom: 6px;
}

.hero-visual {
  padding: 24px;
  display: grid;
  gap: 18px;
}

.chrome-window {
  border-radius: 24px;
  padding: 20px;
  min-height: 280px;
  background: linear-gradient(180deg, #edf4ff 0%, #ffffff 100%);
  border: 1px solid rgba(37, 99, 235, 0.12);
}

.window-bar,
.search-strip,
.tab-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #d1d9ea;
}

.dot.red { background: #ef4444; }
.dot.yellow { background: #f59e0b; }
.dot.green { background: #22c55e; }

.tab-row {
  margin: 16px 0 14px;
  flex-wrap: wrap;
}

.tab-chip,
.version-tag,
.tag-cloud span {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 8px 12px;
  background: rgba(37, 99, 235, 0.08);
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
}

.search-strip {
  padding: 14px 16px;
  border-radius: 18px;
  background: #fff;
  border: 1px solid rgba(21, 35, 59, 0.08);
  color: var(--muted);
}

.visual-grid,
.feature-grid,
.platform-grid,
.review-grid,
.metrics-grid,
.compare-grid,
.tips-grid,
.require-grid,
.logs-grid,
.quick-grid {
  display: grid;
  gap: 18px;
}

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

.visual-card {
  padding: 18px;
  border-radius: 20px;
  background: #fff;
  border: 1px solid rgba(21, 35, 59, 0.08);
}

.sec {
  padding: 34px 0;
}

.sec-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}

.sec-head h2 {
  margin: 12px 0 10px;
  font-size: clamp(28px, 3vw, 40px);
}

.sec-head p {
  margin: 0;
  max-width: 760px;
  color: var(--muted);
  line-height: 1.8;
}

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

.feature-card,
.platform-card,
.review,
.metric,
.compare-card,
.tip-card,
.sidebar-card,
.req-card,
.log-item,
.install-step,
.platform-quick,
.detail-card,
.faq-item {
  padding: 24px;
}

.icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(6, 182, 212, 0.12));
}

.feature-card h3,
.platform-card h3,
.review h3,
.detail-card h3,
.install-step h3,
.faq-item h3,
.compare-card h3,
.tip-card h3,
.req-card h3,
.log-item h3,
.platform-quick h3,
.sidebar-card h3 {
  margin: 0 0 12px;
  font-size: 20px;
}

.feature-card p,
.platform-card p,
.review p,
.detail-card p,
.install-step p,
.faq-item p,
.compare-card p,
.tip-card p,
.req-card p,
.log-item p,
.platform-quick p,
.sidebar-card p,
li {
  color: var(--muted);
  line-height: 1.82;
}

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

.platform-card .btn,
.platform-quick .btn {
  width: 100%;
  margin-top: 14px;
}

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

.detail-card {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 24px;
  align-items: center;
}

.detail-media {
  min-height: 220px;
  border-radius: 22px;
  background: linear-gradient(160deg, rgba(37, 99, 235, 0.12), rgba(6, 182, 212, 0.08), rgba(245, 158, 11, 0.08));
  border: 1px solid rgba(37, 99, 235, 0.1);
  padding: 20px;
}

.media-lines {
  display: grid;
  gap: 10px;
}

.media-lines span {
  display: block;
  height: 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
}

.media-lines span:nth-child(2) { width: 82%; }
.media-lines span:nth-child(3) { width: 64%; }
.media-lines span:nth-child(4) { width: 88%; }

.rating {
  display: inline-flex;
  gap: 4px;
  color: var(--amber);
  margin-bottom: 12px;
}

.metric {
  text-align: center;
}

.metric strong {
  font-size: clamp(28px, 4vw, 42px);
  color: var(--blue);
}

.compare-wrap {
  overflow-x: auto;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
  background: #fff;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--line);
}

.compare-table th,
.compare-table td {
  padding: 16px 18px;
  border-bottom: 1px solid rgba(21, 35, 59, 0.08);
  text-align: left;
}

.compare-table thead th {
  background: rgba(37, 99, 235, 0.06);
}

.compare-table .highlight {
  color: var(--blue);
  font-weight: 700;
}

.page-hero {
  padding: 42px 0 22px;
}

.download-layout,
.article-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 22px;
}

.main-download {
  padding: 30px;
}

.meta-row,
.spec-list,
.footer-note,
.require-list,
.step-list,
.log-list,
.article-list {
  display: grid;
  gap: 12px;
}

.meta-row {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 22px 0;
}

.mini-stat {
  padding: 18px;
}

.spec-list,
.require-list,
.step-list,
.log-list,
.article-list {
  padding-left: 18px;
}

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

.require-grid,
.logs-grid,
.tips-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.article-layout {
  align-items: start;
}

.article-main,
.article-side {
  display: grid;
  gap: 18px;
}

.article-card {
  padding: 28px;
}

.article-card h2,
.article-card h3 {
  margin-top: 0;
}

.tag-cloud {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 18px 0 0;
}

.cta-banner {
  padding: 30px;
  border-radius: 26px;
  background: linear-gradient(135deg, #1d4ed8, #2563eb 48%, #06b6d4);
  color: #fff;
  box-shadow: 0 24px 40px rgba(37, 99, 235, 0.22);
}

.cta-banner p,
.cta-banner h2 {
  color: #fff;
}

.cta-link {
  background: #fff;
  color: var(--blue);
  margin-top: 12px;
}

.site-footer {
  padding: 24px 0 42px;
}

.site-footer .panel {
  padding: 22px 24px;
}

.footer-note {
  color: var(--muted);
}

.footer-note strong {
  color: var(--green);
}

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

@media (max-width: 1080px) {
  .hero-grid,
  .download-layout,
  .article-layout,
  .detail-card {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .platform-grid,
  .review-grid,
  .metrics-grid,
  .compare-grid,
  .require-grid,
  .logs-grid,
  .quick-grid,
  .install-grid,
  .hero-points,
  .meta-row,
  .visual-grid,
  .tips-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .topbar-inner,
  .sec-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .feature-grid,
  .platform-grid,
  .review-grid,
  .metrics-grid,
  .compare-grid,
  .require-grid,
  .logs-grid,
  .quick-grid,
  .install-grid,
  .hero-points,
  .meta-row,
  .visual-grid,
  .tips-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy,
  .main-download,
  .article-card,
  .platform-card,
  .feature-card,
  .review,
  .faq-item,
  .metric,
  .compare-card,
  .tip-card,
  .sidebar-card,
  .platform-quick,
  .detail-card,
  .req-card,
  .log-item,
  .install-step {
    padding: 22px;
  }

  .hero h1,
  .page-hero h1 {
    font-size: 34px;
  }
}

/* FAQ Accordion */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-accordion .faq-item {
  background: var(--panel-strong);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  transition: box-shadow 0.2s ease;
}

.faq-accordion .faq-item:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  text-align: left;
  transition: color 0.2s ease;
}

.faq-q:hover {
  color: var(--blue);
}

.faq-icon {
  flex-shrink: 0;
  margin-left: 12px;
  transition: transform 0.25s ease;
  color: var(--text-secondary);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--blue);
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease, padding 0.25s ease;
  padding: 0 24px;
}

.faq-item.active .faq-a {
  max-height: 500px;
  padding: 0 24px 20px;
}

.faq-a p {
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}