:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-soft: #eef3fb;
  --surface-strong: #0e1726;
  --text: #162033;
  --muted: #5f6f86;
  --line: #d7e2f0;
  --primary: #2563eb;
  --primary-deep: #1d4ed8;
  --secondary: #14b8a6;
  --accent: #f97316;
  --success: #16a34a;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --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 left, rgba(20, 184, 166, 0.12), transparent 34%),
    radial-gradient(circle at top right, rgba(37, 99, 235, 0.14), transparent 28%),
    linear-gradient(180deg, #f8fbff 0%, #eef4fb 100%);
  line-height: 1.65;
}

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

img,
svg {
  display: block;
}

button {
  font: inherit;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(215, 226, 240, 0.9);
  backdrop-filter: blur(18px);
  background: rgba(248, 251, 255, 0.88);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 0;
}

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

.brand-mark {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  box-shadow: 0 14px 28px rgba(37, 99, 235, 0.24);
}

.brand-title {
  font-size: 1.05rem;
  font-weight: 800;
}

.brand-sub {
  font-size: 0.9rem;
  color: var(--muted);
}

.navlist {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.navlist a {
  padding: 10px 16px;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 600;
  transition: 0.25s ease;
}

.navlist a:hover,
.navlist a.on {
  color: #fff;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  box-shadow: 0 12px 24px rgba(37, 99, 235, 0.24);
}

.page-shell {
  padding-bottom: 56px;
}

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

.board {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.96) 0%, rgba(239, 246, 255, 0.98) 100%);
  border: 1px solid rgba(215, 226, 240, 0.8);
  border-radius: 36px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 28px;
  padding: 38px;
}

.hero-copy h1,
.page-hero-copy h1,
.article-hero h1 {
  margin: 0;
  font-size: clamp(2.2rem, 4vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary-deep);
  font-size: 0.92rem;
  font-weight: 700;
}

.hero-copy p,
.page-hero-copy p,
.article-hero p {
  margin: 18px 0 0;
  max-width: 700px;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-actions,
.cta-actions,
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 26px;
}

.btn,
.cta-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 24px;
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  font-weight: 700;
}

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

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  box-shadow: 0 14px 28px rgba(37, 99, 235, 0.22);
}

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

.btn-ghost {
  color: var(--primary-deep);
  background: rgba(37, 99, 235, 0.08);
}

.btn-block {
  width: 100%;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.meta-card,
.mini-card,
.fact-card,
.feature-card,
.review-card,
.download-card,
.guide-card,
.require-card,
.faq-item,
.article-card,
.side-card,
.log-card,
.compare-card,
.panel,
.stat-tile {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.meta-card {
  padding: 18px;
}

.meta-card strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1.2rem;
}

.meta-card span {
  color: var(--muted);
  font-size: 0.95rem;
}

.hero-side {
  display: grid;
  gap: 18px;
}

.panel {
  padding: 24px;
}

.workspace {
  background: linear-gradient(180deg, #0f172a 0%, #172554 100%);
  color: #dbeafe;
  min-height: 100%;
}

.workspace-top,
.workspace-tabs,
.workspace-main,
.sheet-grid,
.sheet-row {
  display: flex;
}

.workspace-top {
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.dot-group {
  display: inline-flex;
  gap: 8px;
}

.dot-group span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.35);
}

.workspace-badge {
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(20, 184, 166, 0.18);
  color: #99f6e4;
  font-size: 0.84rem;
  font-weight: 700;
}

.workspace-tabs {
  gap: 10px;
  margin-bottom: 18px;
}

.workspace-tabs span {
  padding: 8px 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.08);
  font-size: 0.88rem;
}

.workspace-tabs .active {
  background: rgba(37, 99, 235, 0.28);
}

.workspace-main {
  gap: 16px;
}

.sheet-grid {
  flex: 1.2;
  flex-direction: column;
  gap: 10px;
}

.sheet-row {
  gap: 10px;
}

.sheet-row span {
  height: 46px;
  flex: 1;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08) 0%, rgba(96, 165, 250, 0.18) 100%);
}

.sheet-row span.wide {
  flex: 1.8;
}

.workspace-side {
  flex: 0.8;
  display: grid;
  gap: 10px;
}

.workspace-side span {
  min-height: 72px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
}

.quick-stack {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.mini-card {
  padding: 18px;
}

.mini-icon,
.feature-icon,
.download-icon,
.require-icon,
.side-icon,
.section-icon,
.timeline-dot {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary-deep);
}

.mini-card strong,
.feature-card h3,
.download-card h3,
.guide-card h3,
.require-card h3,
.article-card h2,
.side-card h3,
.log-card h3,
.compare-card h3,
.panel h3 {
  display: block;
  margin-top: 16px;
  margin-bottom: 8px;
  font-size: 1.08rem;
}

.mini-card p,
.feature-card p,
.download-card p,
.guide-card p,
.require-card p,
.review-card p,
.article-card p,
.side-card p,
.log-card p,
.compare-card p,
.faq-a,
.panel p,
.bullet-list li,
.timeline-list li,
.side-list li,
.compare-table td,
.compare-table th {
  color: var(--muted);
}

.section {
  padding: 26px 0;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(1.7rem, 2.6vw, 2.7rem);
}

.section-head p {
  margin: 10px 0 0;
  max-width: 720px;
  color: var(--muted);
}

.badge-note {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(20, 184, 166, 0.1);
  color: #0f766e;
  font-size: 0.9rem;
  font-weight: 700;
}

.feature-mosaic {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  padding: 24px;
}

.feature-card.large {
  grid-column: span 7;
}

.feature-card.medium {
  grid-column: span 5;
}

.feature-card.small {
  grid-column: span 4;
}

.feature-card h3 {
  margin-top: 20px;
  font-size: 1.18rem;
}

.point-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.point-row span,
.download-tag,
.log-tag,
.platform-chip,
.article-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--surface-soft);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
}

.platform-grid,
.review-grid,
.require-grid,
.log-grid,
.stat-grid,
.compare-grid {
  display: grid;
  gap: 18px;
}

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

.download-card,
.require-card,
.log-card,
.review-card,
.compare-card,
.stat-tile {
  padding: 24px;
}

.download-card header,
.review-head,
.log-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.download-card ul,
.bullet-list,
.side-list,
.timeline-list {
  margin: 16px 0 0;
  padding-left: 18px;
}

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

.review-avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
}

.review-head {
  justify-content: flex-start;
}

.review-meta strong {
  display: block;
}

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

.faq-wrap {
  display: grid;
  gap: 14px;
}

.faq-item {
  overflow: hidden;
}

.faq-q {
  width: 100%;
  padding: 20px 22px;
  border: 0;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
  color: var(--text);
  font-size: 1rem;
  font-weight: 700;
  text-align: left;
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  padding: 0 22px;
  transition: max-height 0.25s ease, padding-bottom 0.25s ease;
}

.faq-item.open .faq-a {
  max-height: 220px;
  padding-bottom: 20px;
}

.faq-arrow {
  flex: 0 0 auto;
  transition: transform 0.25s ease;
}

.faq-item.open .faq-arrow {
  transform: rotate(180deg);
}

.cta-band {
  padding: 26px 0 0;
}

.cta-panel {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  padding: 32px;
  border-radius: 32px;
  background: linear-gradient(135deg, #0f172a 0%, #1d4ed8 52%, #14b8a6 100%);
  color: #eff6ff;
  box-shadow: 0 20px 44px rgba(15, 23, 42, 0.2);
}

.cta-panel h2,
.cta-panel p {
  margin: 0;
}

.cta-panel p {
  margin-top: 12px;
  color: rgba(239, 246, 255, 0.82);
}

.cta-links {
  display: grid;
  gap: 12px;
  align-content: center;
}

.cta-link {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.cta-link.primary {
  background: #fff;
  color: var(--primary-deep);
}

.page-hero,
.article-hero-wrap {
  padding: 38px 0 24px;
}

.page-hero-grid,
.article-layout {
  display: grid;
  gap: 24px;
}

.page-hero-grid {
  grid-template-columns: 1.15fr 0.85fr;
  padding: 34px;
}

.page-highlights,
.side-stack,
.stats-panel {
  display: grid;
  gap: 14px;
}

.fact-card,
.stat-tile,
.article-card,
.side-card {
  padding: 22px;
}

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

.download-main {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 18px;
}

.download-main-card {
  padding: 28px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.08) 0%, rgba(20, 184, 166, 0.08) 100%);
  border: 1px solid rgba(37, 99, 235, 0.14);
}

.download-main-card h2 {
  margin: 12px 0 0;
  font-size: 1.8rem;
}

.download-main-card p {
  margin: 12px 0 0;
  color: var(--muted);
}

.download-main-card ul {
  margin: 18px 0 0;
  padding-left: 18px;
}

.download-note {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid rgba(37, 99, 235, 0.1);
  color: var(--muted);
}

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

.guide-card {
  padding: 24px;
}

.step-no {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #fff;
  font-weight: 800;
}

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

.log-tag {
  background: rgba(249, 115, 22, 0.12);
  color: #c2410c;
}

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

.security-banner {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding: 22px 24px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(22, 163, 74, 0.12) 0%, rgba(37, 99, 235, 0.08) 100%);
  border: 1px solid rgba(22, 163, 74, 0.18);
}

.article-hero {
  padding: 34px;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.article-layout {
  grid-template-columns: minmax(0, 1fr) 320px;
  align-items: start;
}

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

.article-card {
  padding: 26px;
}

.article-card h2 {
  margin: 0 0 14px;
  font-size: 1.5rem;
}

.article-card h3 {
  margin: 22px 0 10px;
  font-size: 1.08rem;
}

.article-card ul,
.article-card ol {
  padding-left: 18px;
  color: var(--muted);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 16px;
}

.compare-table th,
.compare-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

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

.side-stack {
  position: sticky;
  top: 92px;
}

.side-card h3 {
  margin-top: 0;
}

.side-list {
  margin: 14px 0 0;
}

.footer {
  padding: 24px 0 40px;
}

.footer-inner {
  display: grid;
  gap: 10px;
  padding: 22px 24px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
}

.security-line {
  font-weight: 700;
  color: var(--text);
}

.disclaimer {
  color: var(--muted);
}

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

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

  .feature-card.large,
  .feature-card.medium,
  .feature-card.small,
  .platform-grid,
  .review-grid,
  .require-grid,
  .log-grid {
    grid-column: auto;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature-mosaic,
  .platform-grid,
  .review-grid,
  .require-grid,
  .log-grid,
  .compare-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .side-stack {
    position: static;
  }
}

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

  .hero-grid,
  .page-hero-grid,
  .article-hero,
  .cta-panel {
    padding: 24px;
  }

  .hero-meta,
  .page-highlights,
  .quick-stack,
  .feature-mosaic,
  .platform-grid,
  .review-grid,
  .guide-grid,
  .require-grid,
  .log-grid,
  .compare-grid {
    grid-template-columns: 1fr;
  }

  .workspace-main {
    flex-direction: column;
  }

  .navlist {
    width: 100%;
  }

  .navlist a {
    flex: 1 1 auto;
    text-align: center;
  }

  .hero-copy h1,
  .page-hero-copy h1,
  .article-hero h1 {
    font-size: 2.1rem;
  }
}