:root {
  --bg: #f4f7fb;
  --bg-strong: #eaf1fb;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-strong: #ffffff;
  --surface-alt: #edf4ff;
  --surface-mint: #ecfbf8;
  --ink: #13243d;
  --ink-soft: #5a6f89;
  --ink-faint: #7d8ea5;
  --line: #d7e3f1;
  --line-strong: #c4d5ea;
  --brand: #2b8cff;
  --brand-deep: #1d64db;
  --brand-soft: #e5f0ff;
  --mint: #18b6a0;
  --gold: #f4aa3b;
  --danger: #ff6f7d;
  --shadow: 0 22px 60px rgba(19, 36, 61, 0.08);
  --shadow-soft: 0 12px 32px rgba(19, 36, 61, 0.05);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  line-height: 1.7;
  background:
    radial-gradient(circle at top left, rgba(43, 140, 255, 0.15), transparent 28%),
    radial-gradient(circle at right 16%, rgba(24, 182, 160, 0.12), transparent 24%),
    linear-gradient(180deg, #f8fbff 0%, #f1f6fd 46%, #eef4fb 100%);
}

img,
svg {
  display: block;
}

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

button {
  font: inherit;
}

button,
a.btn,
a.text-link,
a.nav-link {
  -webkit-tap-highlight-color: transparent;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(16px);
  background: rgba(244, 247, 251, 0.84);
  border-bottom: 1px solid rgba(196, 213, 234, 0.78);
}

.navbar {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.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:
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.06) 0 1px, transparent 1px 12px),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.06) 0 1px, transparent 1px 12px),
    linear-gradient(135deg, #874cff 0%, #47a7ff 50%, #e148a8 100%);
  color: #ffffff;
  box-shadow: 0 16px 32px rgba(114, 84, 255, 0.24);
  flex-shrink: 0;
}

.brand-mark svg {
  width: 28px;
  height: 28px;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-copy strong {
  font-size: 1rem;
  line-height: 1.25;
}

.brand-copy span {
  color: var(--ink-soft);
  font-size: 0.88rem;
  line-height: 1.2;
}

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

.nav-link {
  padding: 11px 16px;
  border-radius: 999px;
  color: var(--ink-soft);
  font-weight: 700;
  transition: all 0.2s ease;
}

.nav-link:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.72);
}

.nav-link.active {
  background: var(--ink);
  color: #ffffff;
  box-shadow: 0 10px 24px rgba(19, 36, 61, 0.14);
}

main {
  overflow: hidden;
}

.hero {
  padding: 48px 0 22px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: 24px;
  align-items: stretch;
}

.panel {
  position: relative;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(215, 227, 241, 0.96);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-copy {
  padding: 42px;
}

.hero-copy h1,
.page-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(2.35rem, 5vw, 4.45rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.lead {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.06rem;
  max-width: 62ch;
}

.eyebrow,
.section-tag,
.visual-pill,
.mini-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: fit-content;
  padding: 10px 14px;
  border-radius: 999px;
  font-weight: 700;
}

.eyebrow,
.section-tag {
  margin-bottom: 18px;
  background: var(--brand-soft);
  color: var(--brand-deep);
}

.visual-pill,
.mini-pill {
  background: rgba(255, 255, 255, 0.78);
  color: var(--ink);
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.eyebrow svg,
.section-tag svg,
.visual-pill svg,
.mini-pill svg,
.icon-badge svg,
.download-button svg,
.inline-icon svg,
.list-mark svg,
.btn svg,
.text-link svg,
.safe-icon svg,
.metric-tag svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.action-row,
.cta-actions,
.inline-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
}

.action-row {
  margin-top: 28px;
}

.btn,
.download-button,
.text-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: none;
  border-radius: 16px;
  padding: 15px 22px;
  font-weight: 700;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.btn,
.download-button {
  cursor: pointer;
}

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

.btn-primary,
.download-button.primary {
  color: #ffffff;
  background: linear-gradient(135deg, #2b8cff 0%, #3f74ff 54%, #17b7a0 100%);
  box-shadow: 0 18px 36px rgba(43, 140, 255, 0.24);
}

.btn-secondary,
.download-button.secondary {
  color: var(--ink);
  background: #ffffff;
  border: 1px solid rgba(196, 213, 234, 0.92);
  box-shadow: var(--shadow-soft);
}

.btn-outline,
.download-button.outline {
  color: var(--brand-deep);
  background: var(--brand-soft);
  border: 1px solid rgba(43, 140, 255, 0.12);
}

button:disabled,
.download-button:disabled {
  cursor: wait;
  opacity: 0.86;
  transform: none;
}

.metric-row,
.quick-grid,
.step-grid,
.notice-grid,
.log-grid,
.tips-grid,
.quote-grid,
.card-grid,
.platform-grid,
.faq-grid,
.article-grid,
.dual-grid {
  display: grid;
  gap: 18px;
}

.metric-row {
  margin-top: 30px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric,
.quick-card,
.step,
.notice,
.log-item,
.tip-card,
.quote-card,
.card,
.platform-card,
.faq-item,
.article-card,
.dual-card,
.table-card,
.download-side,
.summary-card {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(215, 227, 241, 0.98);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow-soft);
}

.metric {
  padding: 18px 18px 16px;
  background: linear-gradient(180deg, rgba(237, 244, 255, 0.94) 0%, rgba(255, 255, 255, 0.9) 100%);
}

.metric strong,
.quick-card strong,
.step strong,
.notice strong,
.log-item strong,
.tip-card strong,
.card h3,
.platform-card h3,
.faq-item h3,
.article-card h3,
.dual-card h3,
.table-card h3,
.summary-card strong {
  display: block;
  font-size: 1.06rem;
  line-height: 1.35;
}

.metric span,
.metric p,
.quick-card p,
.step p,
.notice p,
.log-item p,
.tip-card p,
.card p,
.platform-card p,
.faq-item p,
.article-card p,
.dual-card p,
.table-card p,
.summary-card p {
  margin: 8px 0 0;
  color: var(--ink-soft);
}

.hero-visual,
.page-visual {
  padding: 28px;
  background:
    linear-gradient(180deg, rgba(240, 247, 255, 0.96) 0%, rgba(229, 241, 255, 0.9) 100%),
    radial-gradient(circle at top right, rgba(24, 182, 160, 0.15), transparent 30%);
}

.map-shell,
.visual-stack {
  position: relative;
  border-radius: 26px;
}

.map-shell {
  min-height: 300px;
  padding: 26px;
  background: linear-gradient(180deg, rgba(19, 36, 61, 0.98) 0%, rgba(32, 52, 86, 0.96) 100%);
  overflow: hidden;
  color: #f3f7ff;
}

.map-shell::before {
  content: "";
  position: absolute;
  inset: auto auto 18px 24px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(43, 140, 255, 0.32), transparent 66%);
  filter: blur(8px);
}

.map-shell::after {
  content: "";
  position: absolute;
  top: 24px;
  right: 12px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(24, 182, 160, 0.22), transparent 66%);
  filter: blur(8px);
}

.map-top {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
}

.map-title {
  max-width: 240px;
}

.map-title strong {
  display: block;
  font-size: 1.18rem;
}

.map-title span {
  display: block;
  margin-top: 8px;
  color: rgba(243, 247, 255, 0.72);
  font-size: 0.94rem;
}

.map-graphic {
  position: relative;
  z-index: 1;
  margin: 26px auto 0;
  width: min(100%, 360px);
  height: auto;
}

.map-card {
  position: absolute;
  z-index: 2;
  min-width: 132px;
  padding: 14px 14px 12px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(8px);
  box-shadow: 0 18px 32px rgba(0, 0, 0, 0.18);
}

.map-card strong {
  display: block;
  font-size: 0.98rem;
}

.map-card span {
  display: block;
  margin-top: 6px;
  font-size: 0.86rem;
  color: rgba(243, 247, 255, 0.74);
}

.map-card.one {
  top: 88px;
  right: 10px;
}

.map-card.two {
  bottom: 48px;
  left: 18px;
}

.map-card.three {
  bottom: 16px;
  right: 26px;
}

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

.stack-item,
.metric-tag {
  padding: 16px 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.68);
  color: var(--ink);
  position: relative;
  z-index: 1;
}

.stack-item strong,
.metric-tag strong {
  display: block;
  font-size: 0.98rem;
}

.stack-item span,
.metric-tag span {
  display: block;
  margin-top: 6px;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.map-shell .metric-tag {
  background: rgba(255, 255, 255, 0.92);
  border-color: rgba(255, 255, 255, 0.88);
  box-shadow: 0 18px 32px rgba(6, 16, 36, 0.16);
}

.map-shell .metric-tag strong {
  color: var(--ink);
}

.map-shell .metric-tag span {
  color: #4d6484;
}

.section {
  padding: 26px 0;
}

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

.section-head h2,
.section-head .h2 {
  margin: 0;
  font-size: clamp(1.82rem, 4vw, 2.8rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.section-copy,
.section-head p,
.sub-copy,
.platform-meta,
.kicker,
.hero-note,
.safe-copy {
  margin: 10px 0 0;
  color: var(--ink-soft);
}

.text-link {
  color: var(--brand-deep);
  background: rgba(229, 240, 255, 0.92);
  border: 1px solid rgba(43, 140, 255, 0.12);
}

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

.card,
.platform-card,
.quote-card,
.faq-item,
.article-card,
.dual-card,
.table-card,
.summary-card {
  padding: 24px;
}

.icon-badge,
.safe-icon,
.inline-icon {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, rgba(229, 240, 255, 0.95) 0%, rgba(255, 255, 255, 0.92) 100%);
  color: var(--brand-deep);
  border: 1px solid rgba(43, 140, 255, 0.08);
  box-shadow: 0 10px 22px rgba(43, 140, 255, 0.08);
}

.card h3,
.platform-card h3,
.quote-card h3,
.faq-item h3,
.article-card h3,
.dual-card h3,
.table-card h3 {
  margin: 16px 0 0;
  font-size: 1.15rem;
}

.list,
.spec-list,
.safe-list {
  margin: 18px 0 0;
  display: grid;
  gap: 10px;
}

.list-item,
.spec-item,
.safe-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--ink-soft);
}

.list-mark,
.safe-icon {
  flex-shrink: 0;
}

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

.quick-card,
.step,
.notice,
.log-item,
.tip-card,
.download-side {
  padding: 22px;
}

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

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

.platform-top,
.platform-header,
.notice-top,
.summary-top,
.quote-top {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.platform-top strong,
.platform-header strong,
.notice-top strong,
.summary-top strong,
.quote-top strong {
  font-size: 1.08rem;
}

.platform-top span,
.platform-header span,
.notice-top span,
.summary-top span,
.quote-top span {
  display: block;
  margin-top: 6px;
  color: var(--ink-soft);
}

.platform-badges,
.tag-list {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.tag {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(237, 244, 255, 0.98);
  color: var(--brand-deep);
  font-weight: 700;
  font-size: 0.9rem;
}

.download-button {
  width: fit-content;
}

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

.quote-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96) 0%, rgba(248, 251, 255, 0.92) 100%);
}

.quote-card p {
  margin-top: 12px;
}

.quote-card small,
.note-text,
.fine-print {
  display: block;
  margin-top: 14px;
  color: var(--ink-faint);
}

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

.faq-item {
  min-height: 100%;
}

.faq-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  margin-bottom: 14px;
  background: rgba(19, 36, 61, 0.06);
  color: var(--ink);
  font-weight: 800;
}

.cta-strip,
.page-summary {
  padding: 32px;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(215, 227, 241, 0.98);
  background:
    linear-gradient(135deg, rgba(22, 60, 122, 0.98) 0%, rgba(33, 87, 176, 0.96) 48%, rgba(20, 158, 136, 0.94) 100%);
  box-shadow: 0 24px 60px rgba(20, 58, 111, 0.18);
  color: #ffffff;
}

.cta-strip h2,
.page-summary h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  line-height: 1.12;
}

.cta-strip p,
.page-summary p {
  margin: 14px 0 0;
  max-width: 58ch;
  color: rgba(255, 255, 255, 0.82);
}

.cta-strip .btn-secondary,
.page-summary .btn-secondary {
  border-color: rgba(255, 255, 255, 0.3);
}

.page-hero {
  padding: 48px 0 24px;
}

.page-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 24px;
}

.page-hero .panel,
.spotlight,
.download-side,
.table-card,
.summary-card {
  overflow: hidden;
}

.page-hero-copy,
.spotlight,
.summary-card,
.table-card {
  padding: 36px;
}

.spotlight {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.96) 0%, rgba(237, 244, 255, 0.92) 100%);
}

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

.spotlight-lead {
  margin-top: 18px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 18px;
}

.spec-list {
  gap: 12px;
}

.spec-item strong {
  display: inline;
  font-size: inherit;
  margin-right: 4px;
}

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

.step-number {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 800;
  background: var(--brand-soft);
  color: var(--brand-deep);
}

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

.table-wrap {
  overflow-x: auto;
  border-radius: 18px;
  border: 1px solid rgba(215, 227, 241, 0.98);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 640px;
  background: rgba(255, 255, 255, 0.88);
}

.compare-table th,
.compare-table td {
  padding: 16px 18px;
  text-align: left;
  border-bottom: 1px solid rgba(215, 227, 241, 0.92);
  vertical-align: top;
}

.compare-table th {
  background: rgba(237, 244, 255, 0.92);
  color: var(--ink);
  font-size: 0.95rem;
}

.compare-table td {
  color: var(--ink-soft);
}

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

.article-grid {
  align-items: stretch;
}

.article-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(249, 251, 255, 0.94) 100%);
}

.dual-card {
  padding: 26px;
}

.download-side {
  background: linear-gradient(180deg, rgba(19, 36, 61, 0.98) 0%, rgba(38, 63, 102, 0.96) 100%);
  color: #f5f8ff;
}

.download-side p,
.download-side .safe-copy,
.download-side .note-text,
.download-side .platform-meta,
.download-side .summary-top span {
  color: rgba(245, 248, 255, 0.76);
}

.download-side .mini-pill,
.download-side .metric-tag {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

.download-side .metric-tag span {
  color: rgba(245, 248, 255, 0.72);
}

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

.safe-list {
  gap: 12px;
}

.safe-row span {
  color: inherit;
}

.footer {
  padding: 24px 0 36px;
}

.footer-box {
  padding: 28px 30px;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(215, 227, 241, 0.98);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
}

.footer-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.footer-links a {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--ink-soft);
  font-weight: 700;
  background: rgba(237, 244, 255, 0.96);
}

.footer-links a:hover {
  color: var(--ink);
}

.footer-note,
.footer-copy {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-note {
  margin-top: 22px;
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(237, 251, 248, 0.92);
  color: #0f5e53;
  border: 1px solid rgba(24, 182, 160, 0.12);
}

.footer-copy {
  margin-top: 16px;
  color: var(--ink-soft);
}

.safe-icon {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background: rgba(24, 182, 160, 0.12);
  color: #0f5e53;
  box-shadow: none;
}

.inline-split {
  display: flex;
  gap: 18px;
  align-items: center;
  flex-wrap: wrap;
}

.note-panel {
  padding: 18px;
  border-radius: 18px;
  background: rgba(237, 244, 255, 0.92);
  color: var(--ink);
  border: 1px solid rgba(215, 227, 241, 0.98);
}

hr.soft {
  margin: 28px 0;
  border: none;
  border-top: 1px solid rgba(215, 227, 241, 0.92);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 1080px) {
  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .metric-row,
  .quick-grid,
  .notice-grid,
  .log-grid,
  .tips-grid,
  .quote-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  .navbar,
  .footer-top,
  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav,
  .footer-links {
    justify-content: flex-start;
  }

  .hero-grid,
  .page-hero-grid,
  .spotlight-grid,
  .article-grid,
  .dual-grid,
  .platform-grid,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .spotlight-lead,
  .metric-row,
  .step-grid,
  .stack-row {
    grid-template-columns: 1fr;
  }

  .map-card.one,
  .map-card.two,
  .map-card.three {
    position: static;
    margin-top: 12px;
  }

  .map-shell {
    padding-bottom: 20px;
  }
}

@media (max-width: 760px) {
  .hero,
  .page-hero,
  .section,
  .footer {
    padding-top: 20px;
  }

  .hero-copy,
  .page-hero-copy,
  .hero-visual,
  .page-visual,
  .spotlight,
  .download-side,
  .table-card,
  .summary-card,
  .card,
  .platform-card,
  .quote-card,
  .faq-item,
  .article-card,
  .dual-card,
  .step,
  .notice,
  .log-item,
  .tip-card,
  .footer-box,
  .cta-strip,
  .page-summary {
    padding: 24px;
  }

  .card-grid,
  .metric-row,
  .quick-grid,
  .notice-grid,
  .log-grid,
  .tips-grid,
  .quote-grid {
    grid-template-columns: 1fr;
  }

  .brand-copy span {
    display: none;
  }

  .btn,
  .download-button,
  .text-link {
    width: 100%;
  }

  .action-row,
  .cta-actions {
    align-items: stretch;
  }
}

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

  to {
    transform: rotate(360deg);
  }
}