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

:root {
  --bg: #f5f8ff;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-strong: #ffffff;
  --text: #11203a;
  --muted: #5d6b85;
  --line: rgba(23, 48, 89, 0.12);
  --primary: #2563eb;
  --primary-strong: #1d4ed8;
  --accent: #00bfa5;
  --warm: #f59e0b;
  --shadow: 0 24px 60px rgba(26, 43, 76, 0.12);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --container: 1160px;
}

* {
  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(37, 99, 235, 0.14), transparent 28%),
    radial-gradient(circle at 90% 10%, rgba(0, 191, 165, 0.14), transparent 20%),
    linear-gradient(180deg, #f8fbff 0%, #eef4ff 50%, #f8fbff 100%);
  line-height: 1.65;
}

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

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

button {
  font: inherit;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: rgba(248, 251, 255, 0.88);
  border-bottom: 1px solid rgba(37, 99, 235, 0.08);
}

.navbar {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-text small {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
  margin-top: 2px;
}

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

.nav-link {
  padding: 11px 16px;
  border-radius: 999px;
  color: #47607f;
  font-weight: 700;
  transition: all 0.25s ease;
}

.nav-link:hover,
.nav-link.active {
  color: #0f3ca3;
  background: rgba(37, 99, 235, 0.12);
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.15);
}

.hero {
  padding: 52px 0 30px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 26px;
  align-items: stretch;
}

.hero-card,
.panel,
.feature-card,
.quote-card,
.faq-item,
.update-card,
.tip-card,
.compare-card,
.download-card,
.stat-card,
.timeline-card,
.highlight-card,
.cta-strip {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.hero-card,
.panel,
.cta-strip {
  border-radius: var(--radius-xl);
}

.feature-card,
.quote-card,
.faq-item,
.update-card,
.tip-card,
.compare-card,
.download-card,
.stat-card,
.timeline-card,
.highlight-card {
  border-radius: var(--radius-lg);
}

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

.hero-card::after {
  content: "";
  position: absolute;
  inset: auto -60px -60px auto;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.18), transparent 68%);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(17, 32, 58, 0.05);
  color: #26446e;
  font-weight: 700;
  font-size: 13px;
}

.hero h1,
.page-hero h1 {
  margin: 18px 0 14px;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.lead {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.hero-actions,
.button-group {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.btn,
.download-btn,
.link-btn {
  border: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 50px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover,
.download-btn:hover,
.link-btn:hover {
  transform: translateY(-1px);
}

.btn-primary,
.download-btn.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: #fff;
  box-shadow: 0 16px 28px rgba(37, 99, 235, 0.28);
}

.btn-secondary,
.download-btn.secondary,
.link-btn {
  background: #fff;
  color: var(--text);
  box-shadow: inset 0 0 0 1px rgba(17, 32, 58, 0.12);
}

.btn[disabled],
.download-btn[disabled] {
  opacity: 0.86;
  cursor: wait;
  transform: none;
}

.hero-metrics,
.stats-grid,
.feature-grid,
.quote-grid,
.download-grid,
.info-grid,
.compare-grid,
.tip-grid,
.updates-grid,
.timeline-grid {
  display: grid;
  gap: 18px;
}

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

.stat-card {
  padding: 18px;
}

.stat-card strong {
  display: block;
  font-size: 28px;
  margin-bottom: 4px;
}

.panel {
  padding: 28px;
}

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

.browser-scene {
  padding: 24px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.1), rgba(255,255,255,0.95));
  border: 1px solid rgba(37, 99, 235, 0.1);
}

.browser-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.browser-bar span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #d0d8ea;
}

.browser-window {
  border-radius: 18px;
  background: #fff;
  padding: 18px;
  box-shadow: 0 16px 28px rgba(21, 37, 70, 0.08);
}

.url-line,
.tab-line {
  border-radius: 999px;
  background: #edf3ff;
}

.url-line {
  height: 14px;
  width: 78%;
  margin-bottom: 14px;
}

.tab-line {
  height: 68px;
  width: 100%;
}

.section {
  padding: 34px 0;
}

.section-title {
  margin: 0 0 10px;
  font-size: clamp(28px, 3vw, 40px);
  letter-spacing: -0.02em;
}

.section-subtitle {
  margin: 0 0 22px;
  color: var(--muted);
}

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

.feature-card,
.download-card,
.quote-card,
.compare-card,
.tip-card,
.update-card,
.timeline-card,
.highlight-card,
.faq-item {
  padding: 24px;
}

.card-icon {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
}

.feature-card h3,
.download-card h3,
.quote-card h3,
.compare-card h3,
.tip-card h3,
.update-card h3,
.timeline-card h3,
.highlight-card h3,
.faq-item h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.feature-card p,
.download-card p,
.quote-card p,
.compare-card p,
.tip-card p,
.update-card p,
.timeline-card p,
.highlight-card p,
.faq-item p,
.faq-item li,
.table-wrap td,
.table-wrap th {
  margin: 0;
  color: var(--muted);
}

.quote-grid,
.download-grid,
.compare-grid,
.tip-grid,
.updates-grid,
.timeline-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.badge-row,
.meta-row,
.tag-row,
.download-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.badge,
.tag,
.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 11px;
  border-radius: 999px;
  background: rgba(17, 32, 58, 0.06);
  color: #39506f;
  font-size: 13px;
  font-weight: 700;
}

.download-card .download-btn {
  margin-top: 20px;
  width: 100%;
}

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.8);
  box-shadow: var(--shadow);
}

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

.table-wrap th,
.table-wrap td {
  padding: 16px 18px;
  border-bottom: 1px solid rgba(17, 32, 58, 0.08);
  text-align: left;
}

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

.list {
  margin: 14px 0 0;
  padding-left: 18px;
}

.list li + li {
  margin-top: 8px;
}

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

.cta-strip {
  padding: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.page-hero {
  padding: 50px 0 24px;
}

.page-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
  gap: 22px;
  align-items: center;
}

.safe-note {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(52, 168, 83, 0.12);
  color: #19633a;
  font-weight: 700;
}

.site-footer {
  padding: 28px 0 44px;
}

.footer-box {
  padding: 22px 24px;
  border-radius: 20px;
  background: rgba(255,255,255,0.82);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.footer-box p {
  margin: 0;
  color: var(--muted);
}

.footer-box p + p {
  margin-top: 10px;
}

.footer-box .safe-text {
  color: #19633a;
  font-weight: 800;
}

@media (max-width: 980px) {
  .hero-grid,
  .page-hero-grid,
  .feature-grid,
  .hero-metrics,
  .download-grid,
  .quote-grid,
  .compare-grid,
  .tip-grid,
  .updates-grid,
  .timeline-grid {
    grid-template-columns: 1fr;
  }

  .cta-strip,
  .navbar {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .hero-card,
  .panel,
  .feature-card,
  .quote-card,
  .download-card,
  .compare-card,
  .tip-card,
  .update-card,
  .faq-item,
  .cta-strip,
  .timeline-card,
  .highlight-card {
    padding: 20px;
  }

  .navbar {
    min-height: unset;
    padding: 16px 0;
  }

  .nav-links {
    width: 100%;
  }

  .nav-link {
    flex: 1 1 calc(33.333% - 7px);
    text-align: center;
  }

  .hero h1,
  .page-hero h1 {
    font-size: 32px;
  }
}

.magazine-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 20px;
}

.story-grid,
.persona-grid,
.decision-grid,
.knowledge-grid,
.path-grid,
.signal-grid {
  display: grid;
  gap: 18px;
}

.story-grid {
  grid-template-columns: 1.2fr 0.8fr;
}

.persona-grid,
.decision-grid,
.knowledge-grid,
.path-grid,
.signal-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.story-card,
.persona-card,
.decision-card,
.knowledge-card,
.path-card,
.signal-card,
.checklist-card,
.spotlight-card {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.story-card h3,
.persona-card h3,
.decision-card h3,
.knowledge-card h3,
.path-card h3,
.signal-card h3,
.checklist-card h3,
.spotlight-card h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.story-card p,
.persona-card p,
.decision-card p,
.knowledge-card p,
.path-card p,
.signal-card p,
.checklist-card p,
.spotlight-card p {
  margin: 0;
  color: var(--muted);
}

.story-card.featured {
  background: linear-gradient(180deg, rgba(255,255,255,0.92), rgba(230, 240, 255, 0.92));
}

.serial-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary-strong);
  font-weight: 800;
  margin-bottom: 14px;
}

.mini-title {
  margin: 0 0 8px;
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #57739a;
}

.split-note {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.split-note div {
  padding: 16px;
  border-radius: 16px;
  background: rgba(255,255,255,0.8);
  border: 1px solid rgba(17, 32, 58, 0.08);
}

.anchor-panel {
  display: grid;
  gap: 14px;
}

.anchor-item {
  padding: 16px 18px;
  border-radius: 16px;
  background: rgba(37, 99, 235, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.1);
}

.anchor-item strong {
  display: block;
  margin-bottom: 4px;
}

.cta-block {
  padding: 30px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(0, 191, 165, 0.12));
  border: 1px solid rgba(37, 99, 235, 0.12);
  box-shadow: var(--shadow);
}

.cta-block p {
  margin: 8px 0 0;
  color: var(--muted);
}

.bullet-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.bullet-columns ul {
  margin: 0;
  padding-left: 18px;
}

.bullet-columns li + li {
  margin-top: 8px;
}

.selector-grid,
.editorial-grid,
.aside-stack,
.compact-grid,
.mini-compare-grid {
  display: grid;
  gap: 18px;
}

.selector-grid {
  grid-template-columns: 0.95fr 1.05fr;
}

.editorial-grid {
  grid-template-columns: 1.15fr 0.85fr;
}

.aside-stack,
.compact-grid,
.mini-compare-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.selector-card,
.editorial-card,
.focus-card,
.mini-card,
.windows-spotlight,
.windows-detail,
.platform-rail,
.platform-mini,
.editorial-note {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.selector-card,
.editorial-card,
.focus-card,
.windows-spotlight,
.editorial-note {
  border-radius: var(--radius-xl);
}

.mini-card,
.windows-detail,
.platform-rail,
.platform-mini {
  border-radius: var(--radius-lg);
}

.selector-card,
.editorial-card,
.focus-card,
.mini-card,
.windows-spotlight,
.windows-detail,
.platform-rail,
.platform-mini,
.editorial-note {
  padding: 24px;
}

.selector-card h3,
.editorial-card h3,
.focus-card h3,
.mini-card h3,
.windows-spotlight h3,
.windows-detail h3,
.platform-rail h3,
.platform-mini h3,
.editorial-note h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.selector-card p,
.editorial-card p,
.focus-card p,
.mini-card p,
.windows-spotlight p,
.windows-detail p,
.platform-rail p,
.platform-mini p,
.editorial-note p {
  margin: 0;
  color: var(--muted);
}

.windows-stage {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
  gap: 20px;
}

.windows-spotlight {
  background: linear-gradient(180deg, rgba(255,255,255,0.95), rgba(228, 239, 255, 0.96));
  position: relative;
  overflow: hidden;
}

.windows-spotlight::after {
  content: "";
  position: absolute;
  right: -40px;
  bottom: -40px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.16), transparent 70%);
}

.windows-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.12);
  color: #1748b7;
  font-weight: 800;
  font-size: 13px;
}

.windows-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.windows-metrics div {
  padding: 16px;
  border-radius: 16px;
  background: rgba(255,255,255,0.88);
  border: 1px solid rgba(17, 32, 58, 0.08);
}

.windows-metrics strong {
  display: block;
  margin-bottom: 4px;
  font-size: 24px;
}

.platform-mini .download-btn,
.windows-spotlight .download-btn {
  margin-top: 18px;
  width: 100%;
}

.rail-list {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.rail-item {
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(37, 99, 235, 0.06);
  border: 1px solid rgba(37, 99, 235, 0.1);
}

.editorial-note {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(0, 191, 165, 0.08));
}

.stack-list {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.stack-list div {
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(255,255,255,0.82);
  border: 1px solid rgba(17, 32, 58, 0.08);
}

@media (max-width: 980px) {
  .magazine-hero,
  .story-grid,
  .persona-grid,
  .decision-grid,
  .knowledge-grid,
  .path-grid,
  .signal-grid,
  .split-note,
  .bullet-columns,
  .selector-grid,
  .editorial-grid,
  .aside-stack,
  .compact-grid,
  .mini-compare-grid,
  .windows-stage,
  .windows-metrics {
    grid-template-columns: 1fr;
  }
}

.portal-shell,
.portal-grid,
.signal-board,
.route-board,
.shelf-grid,
.matrix-grid,
.chapter-grid,
.lane-grid,
.deck-grid,
.summary-grid {
  display: grid;
  gap: 20px;
}

.portal-grid {
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.8fr);
}

.signal-board,
.route-board,
.matrix-grid,
.chapter-grid,
.lane-grid,
.deck-grid,
.summary-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.portal-hero,
.portal-side,
.board-card,
.route-card,
.shelf-card,
.matrix-card,
.chapter-card,
.lane-card,
.deck-card,
.summary-card,
.windows-core,
.windows-side {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.portal-hero,
.portal-side,
.windows-core,
.windows-side {
  border-radius: var(--radius-xl);
  padding: 28px;
}

.board-card,
.route-card,
.shelf-card,
.matrix-card,
.chapter-card,
.lane-card,
.deck-card,
.summary-card {
  border-radius: var(--radius-lg);
  padding: 22px;
}

.portal-hero h1,
.windows-core h2 {
  margin: 16px 0 12px;
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.02em;
}

.portal-hero p,
.portal-side p,
.board-card p,
.route-card p,
.shelf-card p,
.matrix-card p,
.chapter-card p,
.lane-card p,
.deck-card p,
.summary-card p,
.windows-core p,
.windows-side p {
  margin: 0;
  color: var(--muted);
}

.portal-stamp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.08);
  color: #1f4fb7;
  font-size: 13px;
  font-weight: 800;
}

.portal-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.micro-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.micro-list div {
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(255,255,255,0.84);
  border: 1px solid rgba(17, 32, 58, 0.08);
}

.step-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(37, 99, 235, 0.12);
  color: var(--primary-strong);
  font-weight: 800;
  margin-bottom: 12px;
}

.section-note {
  margin: 0 0 22px;
  color: var(--muted);
}

.windows-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: 20px;
}

.windows-core {
  background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(227, 239, 255, 0.95));
  position: relative;
  overflow: hidden;
}

.windows-core::after {
  content: "";
  position: absolute;
  width: 220px;
  height: 220px;
  right: -50px;
  bottom: -50px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.16), transparent 72%);
}

.windows-panel-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 22px 0;
}

.windows-panel-grid div {
  padding: 16px;
  border-radius: 16px;
  background: rgba(255,255,255,0.88);
  border: 1px solid rgba(17, 32, 58, 0.08);
}

.windows-panel-grid strong {
  display: block;
  margin-bottom: 4px;
  font-size: 22px;
}

.platform-stack {
  display: grid;
  gap: 16px;
}

.platform-box {
  padding: 18px;
  border-radius: 18px;
  background: rgba(255,255,255,0.84);
  border: 1px solid rgba(17, 32, 58, 0.08);
}

.platform-box h3 {
  margin: 0 0 8px;
}

.platform-box .download-btn,
.windows-core .download-btn {
  width: 100%;
  margin-top: 16px;
}

@media (max-width: 980px) {
  .portal-grid,
  .signal-board,
  .route-board,
  .shelf-grid,
  .matrix-grid,
  .chapter-grid,
  .lane-grid,
  .deck-grid,
  .summary-grid,
  .windows-layout,
  .windows-panel-grid {
    grid-template-columns: 1fr;
  }
}