/* Cursor 3 intro — Apple-like light UI, Inter + JetBrains Mono (OFL via Bunny Fonts) */
:root {
  --bg: #fbfbfd;
  --bg-tint: #f5f5f7;
  --surface: #ffffff;
  --text: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary: #86868b;
  --separator: rgba(0, 0, 0, 0.08);
  --blue: #0071e3;
  --blue-hover: #0077ed;
  --purple: #af52de;
  --pink: #ff2d55;
  --orange: #ff9500;
  --cyan: #32ade6;
  --green: #34c759;
  --mint: #00c7be;
  --amber: #ff9500;
  --glass: rgba(255, 255, 255, 0.65);
  --glass2: rgba(255, 255, 255, 0.85);
  --gbr: rgba(255, 255, 255, 0.85);
  --ghi: rgba(255, 255, 255, 0.95);
  --gsh: 0.12;
  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-soft: 0 4px 24px rgba(0, 0, 0, 0.06);
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.04);
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --max: 1060px;
  --header-h: 52px;
  --transition-theme: 0.3s ease;
}

/* Dark mode variables */
[data-theme="dark"] {
  --bg: #070810;
  --bg-tint: #121320;
  --surface: rgba(255, 255, 255, 0.06);
  --text: #f5f5f7;
  --text-secondary: rgba(255, 255, 255, 0.68);
  --text-tertiary: rgba(255, 255, 255, 0.42);
  --separator: rgba(255, 255, 255, 0.12);
  --blue: #0a84ff;
  --blue-hover: #409cff;
  --purple: #bf5af2;
  --pink: #ff375f;
  --orange: #ff9f0a;
  --cyan: #64d2ff;
  --green: #30d158;
  --mint: #59f0be;
  --amber: #ffb45c;
  --glass: rgba(255, 255, 255, 0.07);
  --glass2: rgba(255, 255, 255, 0.13);
  --gbr: rgba(255, 255, 255, 0.16);
  --ghi: rgba(255, 255, 255, 0.32);
  --gsh: 0.45;
  --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.45);
  --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.3);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  transition: background var(--transition-theme), color var(--transition-theme);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.47059;
  letter-spacing: -0.022em;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.skip-link {
  position: absolute;
  left: -9999px;
  z-index: 200;
  padding: 0.5rem 1rem;
  background: var(--blue);
  color: #fff;
  font-weight: 600;
  border-radius: 8px;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
}

.container {
  width: min(100% - 48px, var(--max));
  margin-inline: auto;
}

@media (max-width: 734px) {
  .container {
    width: min(100% - 32px, var(--max));
  }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(251, 251, 253, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--separator);
  transition: background var(--transition-theme);
}

[data-theme="dark"] .site-header {
  background: rgba(29, 29, 31, 0.72);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  width: 100%;
}

.logo {
  font-weight: 600;
  font-size: 21px;
  letter-spacing: -0.03em;
  color: var(--text);
  text-decoration: none;
}

.logo-ver {
  display: inline-block;
  margin-left: 2px;
  font-size: 0.75em;
  font-weight: 700;
  color: var(--blue);
  vertical-align: super;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.nav a {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text-secondary);
  text-decoration: none;
}

.nav a:hover,
.nav a.is-active {
  color: var(--blue);
}

.nav a.is-active {
  font-weight: 600;
}

/* Hero */
.hero {
  padding: 56px 0 72px;
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
}

.hero-grid {
  display: grid;
  gap: 48px;
  align-items: center;
}

@media (min-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

.eyebrow {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-tertiary);
  margin: 0 0 12px;
  letter-spacing: 0.02em;
}

.hero h1 {
  font-size: clamp(40px, 5vw, 56px);
  line-height: 1.05;
  font-weight: 600;
  letter-spacing: -0.045em;
  margin: 0 0 20px;
}

.lead {
  font-size: 21px;
  line-height: 1.381;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: -0.022em;
  margin: 0 0 28px;
  max-width: 36em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 980px;
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.022em;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.2s, opacity 0.2s;
}

.btn-primary {
  background: var(--blue);
  color: #fff;
}

.btn-primary:hover {
  background: var(--blue-hover);
}

.btn-secondary {
  background: transparent;
  color: var(--blue);
  box-shadow: inset 0 0 0 1px var(--blue);
}

.btn-secondary:hover {
  background: rgba(0, 113, 227, 0.06);
}

.font-note {
  font-size: 12px;
  color: var(--text-tertiary);
  margin: 0;
}

.font-note strong {
  font-weight: 600;
  color: var(--text-secondary);
}

/* Device mock */
.hero-visual {
  display: flex;
  justify-content: center;
}

.device-frame {
  width: 100%;
  max-width: 400px;
  background: linear-gradient(145deg, #e8e8ed 0%, #d2d2d7 100%);
  border-radius: 28px;
  padding: 10px;
  box-shadow: var(--shadow-soft), 0 24px 80px rgba(0, 0, 0, 0.12);
  transition: background var(--transition-theme);
}

[data-theme="dark"] .device-frame {
  background: linear-gradient(145deg, #3a3a3c 0%, #2c2c2e 100%);
}

.device-notch {
  width: 120px;
  height: 28px;
  margin: 0 auto 8px;
  background: #1d1d1f;
  border-radius: 0 0 16px 16px;
  opacity: 0.9;
}

.device-screen {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 8px;
  min-height: 220px;
  background: var(--surface);
  border-radius: 20px;
  padding: 12px;
  border: 1px solid var(--separator);
}

.mock-sidebar {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 8px 4px;
  background: var(--bg-tint);
  border-radius: 12px;
}

.mock-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #c7c7cc;
  display: inline-block;
  margin-right: 4px;
}

[data-theme="dark"] .mock-dot {
  background: #636366;
}

.mock-rows {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 8px;
}

.mock-row {
  height: 8px;
  border-radius: 4px;
  background: #d2d2d7;
  opacity: 0.6;
}

[data-theme="dark"] .mock-row {
  background: #48484a;
}

.mock-row.active {
  background: var(--blue);
  opacity: 1;
}

.mock-main {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mock-chat {
  flex: 1;
  min-height: 48px;
  border-radius: 10px;
  background: linear-gradient(90deg, #f5f5f7 0%, #fff 40%);
  border: 1px solid var(--separator);
}

[data-theme="dark"] .mock-chat {
  background: linear-gradient(90deg, #3a3a3c 0%, #2c2c2e 40%);
}

.mock-chat.short {
  min-height: 36px;
  max-height: 36px;
}

.mock-browser {
  flex: 1;
  min-height: 72px;
  border-radius: 10px;
  background: linear-gradient(135deg, #e8f4ff 0%, #fff 60%);
  border: 1px solid rgba(0, 113, 227, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  color: var(--blue);
  letter-spacing: 0.04em;
}

[data-theme="dark"] .mock-browser {
  background: linear-gradient(135deg, #1a2a3a 0%, #2c2c2e 60%);
  border-color: rgba(10, 132, 255, 0.3);
}

/* Sections */
.section {
  padding: 72px 0;
}

.section-tint {
  background: var(--bg-tint);
}

.section-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  margin: 0 0 8px;
}

.section-title {
  font-size: clamp(32px, 4vw, 40px);
  line-height: 1.1;
  font-weight: 600;
  letter-spacing: -0.045em;
  margin: 0 0 16px;
}

.section-desc {
  font-size: 19px;
  line-height: 1.4211;
  color: var(--text-secondary);
  letter-spacing: -0.022em;
  max-width: 42em;
  margin: 0 0 32px;
}

.narrow-block {
  max-width: 42em;
}

/* Diagram */
.diagram-card {
  margin: 0;
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--separator);
}

.diagram-svg {
  width: 100%;
  height: auto;
  display: block;
}

.svg-label {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  fill: var(--text);
}

.svg-caption {
  font-family: var(--font-sans);
  font-size: 12px;
  fill: var(--text-tertiary);
}

.svg-mini {
  font-family: var(--font-sans);
  font-size: 11px;
  fill: var(--text-secondary);
}

/* SVG rect styles */
.svg-rect-light {
  fill: var(--surface);
  stroke: var(--separator);
  stroke-width: 1;
}

.svg-rect-accent {
  fill: #e8f2ff;
  stroke: #0071e3;
  stroke-opacity: 0.35;
}

[data-theme="dark"] .svg-rect-accent {
  fill: #1a2a3a;
  stroke: #0a84ff;
}

.svg-rect-green {
  fill: #f5fff7;
  stroke: #34c759;
  stroke-opacity: 0.35;
}

[data-theme="dark"] .svg-rect-green {
  fill: #1a2a1a;
  stroke: #30d158;
}

/* SVG gradient dark mode overrides */
[data-theme="dark"] .svg-grad-blue stop:first-child {
  stop-color: #0a84ff;
  stop-opacity: 0.2;
}

[data-theme="dark"] .svg-grad-green stop:first-child {
  stop-color: #30d158;
  stop-opacity: 0.18;
}

[data-theme="dark"] .svg-grad-purple stop:first-child {
  stop-color: #bf5af2;
  stop-opacity: 0.18;
}

/* SVG card border styles */
.svg-card-blue {
  stroke: #0071e3;
  stroke-opacity: 0.25;
}

.svg-card-green {
  stroke: #34c759;
  stroke-opacity: 0.25;
}

.svg-card-purple {
  stroke: #af52de;
  stroke-opacity: 0.25;
}

[data-theme="dark"] .svg-card-blue {
  stroke: #0a84ff;
  stroke-opacity: 0.4;
}

[data-theme="dark"] .svg-card-green {
  stroke: #30d158;
  stroke-opacity: 0.4;
}

[data-theme="dark"] .svg-card-purple {
  stroke: #bf5af2;
  stroke-opacity: 0.4;
}

.diagram-caption {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 16px 8px 0;
  line-height: 1.5;
}

/* Bento */
.bento {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

@media (min-width: 734px) {
  .bento {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .bento {
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: minmax(140px, auto);
  }

  .bento-large {
    grid-column: span 2;
    grid-row: span 2;
  }

  .bento-wide {
    grid-column: span 2;
  }
}

.bento-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--separator);
  box-shadow: var(--shadow-card);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  overflow: hidden;
}

.bento-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.08);
}

.bento-large {
  padding: 32px;
}

.bento-icon {
  font-size: 22px;
  color: var(--blue);
  margin-bottom: 12px;
  line-height: 1;
}

.bento-card h3 {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.022em;
  margin: 0 0 10px;
}

.bento-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.68;
  color: var(--text-secondary);
}

.bento-list {
  list-style: none;
  padding: 0;
  margin: 12px 0 0;
}

.bento-list li {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 4px 0;
  padding-left: 16px;
  position: relative;
}

.bento-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--blue);
  font-weight: 600;
}

/* Split + flow */
.split {
  display: grid;
  gap: 40px;
  align-items: start;
}

@media (min-width: 860px) {
  .split {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
}

.checklist {
  margin: 0 0 16px;
  padding-left: 1.2em;
  color: var(--text-secondary);
  font-size: 17px;
}

.checklist li {
  margin-bottom: 10px;
}

.source-note {
  font-size: 14px;
}

.source-note a {
  color: var(--blue);
  text-decoration: none;
}

.source-note a:hover {
  text-decoration: underline;
}

.panel-visual {
  display: flex;
  justify-content: center;
}

.flow-chart {
  position: relative;
  width: 100%;
  max-width: 340px;
  min-height: 280px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--separator);
  box-shadow: var(--shadow-card);
  padding: 24px;
}

.flow-hub {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 132px;
  height: 132px;
  border-radius: 50%;
  background: linear-gradient(180deg, #0071e3 0%, #005bb5 100%);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  line-height: 1.25;
  padding: 12px;
  box-shadow: 0 12px 32px rgba(0, 113, 227, 0.35);
}

.flow-node {
  position: absolute;
  font-size: 12px;
  font-weight: 600;
  padding: 10px 14px;
  background: var(--bg-tint);
  border-radius: 980px;
  border: 1px solid var(--separator);
  color: var(--text-secondary);
}

.flow-node:nth-of-type(1) {
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
}

.flow-node:nth-of-type(2) {
  bottom: 24px;
  left: 16px;
}

.flow-node:nth-of-type(3) {
  bottom: 24px;
  right: 16px;
}

.flow-node:nth-of-type(4) {
  top: 50%;
  right: 8px;
  transform: translateY(-50%);
}

/* Keyboard table */
.kbd-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--separator);
  background: var(--surface);
  box-shadow: var(--shadow-card);
}

.kbd-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.kbd-table th,
.kbd-table td {
  padding: 14px 20px;
  text-align: left;
  border-bottom: 1px solid var(--separator);
}

.kbd-table th {
  font-weight: 600;
  background: var(--bg-tint);
  color: var(--text-secondary);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.kbd-table tr:last-child td {
  border-bottom: none;
}

kbd {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  padding: 4px 8px;
  border-radius: 6px;
  background: var(--bg-tint);
  border: 1px solid var(--separator);
  color: var(--text);
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  font-weight: 500;
  padding: 2px 6px;
  border-radius: 6px;
  background: rgba(0, 113, 227, 0.08);
  color: var(--blue);
}

/* Compare */
.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-right: 16px;
  font-size: 15px;
  color: var(--text-secondary);
}

.dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot.strong {
  background: #34c759;
  box-shadow: 0 0 0 3px rgba(52, 199, 89, 0.25);
}

.dot.mid {
  background: #ff9500;
  box-shadow: 0 0 0 3px rgba(255, 149, 0, 0.22);
}

.dot.weak {
  background: #d2d2d7;
}

[data-theme="dark"] .dot.weak {
  background: #48484a;
}

.compare-wrap {
  overflow-x: auto;
  margin-bottom: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--separator);
  background: var(--surface);
  box-shadow: var(--shadow-card);
}

.compare-table {
  width: 100%;
  min-width: 760px;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 14px;
}

.compare-table th {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--separator);
  vertical-align: middle;
}

.compare-table td {
  padding: 12px 16px;
  text-align: center;
  border-bottom: 1px solid var(--separator);
  vertical-align: middle;
  white-space: nowrap;
}

.compare-table thead th {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
  background: var(--bg-tint);
  position: sticky;
  top: 0;
  z-index: 1;
  text-align: center;
}

.compare-table thead th:first-child {
  border-top-left-radius: var(--radius-md);
  text-align: left;
}

.compare-table thead th:last-child {
  border-top-right-radius: var(--radius-md);
}

.compare-table tbody tr:last-child th,
.compare-table tbody tr:last-child td {
  border-bottom: none;
}

.compare-table tbody tr:last-child th:first-child {
  border-bottom-left-radius: var(--radius-md);
}

.compare-table tbody tr:last-child td:last-child {
  border-bottom-right-radius: var(--radius-md);
}

.compare-table tbody th[scope="row"] {
  font-weight: 600;
  color: var(--text);
  width: 22%;
  background: rgba(0, 0, 0, 0.02);
  white-space: nowrap;
}

.compare-table td:nth-child(2) {
  background: rgba(0, 113, 227, 0.04);
}

.compare-table tr:last-child th,
.compare-table tr:last-child td {
  border-bottom: none;
}

.compare-table .dot {
  display: inline-block;
  margin: 0 auto;
  vertical-align: middle;
}

.dot-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  white-space: nowrap;
}

.insight-cards {
  display: grid;
  gap: 16px;
}

@media (min-width: 640px) {
  .insight-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .insight-cards {
    grid-template-columns: repeat(4, 1fr);
  }
}

.insight-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 22px;
  border: 1px solid var(--separator);
}

.insight-card h3 {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
  margin: 0 0 10px;
  letter-spacing: -0.022em;
}

.insight-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.68;
  color: var(--text-secondary);
}

.compare-footnote {
  margin-top: 32px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-tertiary);
}

.compare-footnote a {
  color: var(--blue);
  text-decoration: none;
}

.compare-footnote a:hover {
  text-decoration: underline;
}

/* CTA */
.section-cta {
  text-align: center;
  padding-bottom: 88px;
}

.section-cta .section-title {
  margin-bottom: 24px;
}

.steps {
  text-align: left;
  max-width: 28em;
  margin: 0 auto 28px;
  color: var(--text-secondary);
  font-size: 17px;
}

.steps li {
  margin-bottom: 12px;
}

/* Footer */
.site-footer {
  padding: 32px 0 48px;
  border-top: 1px solid var(--separator);
  background: var(--bg-tint);
}

.footer-inner p {
  margin: 0 0 8px;
  font-size: 12px;
  color: var(--text-tertiary);
  line-height: 1.5;
}

.footer-inner a {
  color: var(--text-secondary);
}

.footer-inner a:hover {
  color: var(--blue);
}

.muted {
  color: var(--text-tertiary);
}

/* Media: YouTube embeds + tiles */
.media-grid {
  display: grid;
  gap: 24px;
  margin-bottom: 40px;
}

@media (min-width: 900px) {
  .media-grid-featured {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.video-card {
  margin: 0;
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--separator);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.video-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
}

.video-frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-caption {
  padding: 16px 20px 20px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-secondary);
}

.video-caption strong {
  color: var(--text);
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
}

.video-caption a {
  color: var(--blue);
  text-decoration: none;
  white-space: nowrap;
}

.video-caption a:hover {
  text-decoration: underline;
}

.media-subtitle {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.022em;
  margin: 48px 0 8px;
}

.media-lead {
  margin: 0 0 20px;
  font-size: 15px;
  color: var(--text-secondary);
}

.media-tiles {
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

@media (min-width: 734px) {
  .media-tiles {
    grid-template-columns: repeat(3, 1fr);
  }
}

.media-tile {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--separator);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.media-tile:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}

.media-tile-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--bg-tint);
  overflow: hidden;
}

.media-tile-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-tile-thumb-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 120px;
  background: linear-gradient(145deg, #e8f4ff, #f5f5f7);
}

.media-tile-fallback-text {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue);
}

.media-tile-play {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.95);
  color: var(--blue);
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-left: 4px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.media-tile-body {
  padding: 14px 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.media-tile-title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.015em;
}

.media-tile-meta {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.4;
}

.audio-note {
  margin-top: 36px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: rgba(0, 113, 227, 0.06);
  border: 1px solid rgba(0, 113, 227, 0.15);
}

.audio-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-secondary);
}

.audio-note strong {
  color: var(--text);
}

.cn-network-note {
  margin-top: 36px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: #f5f5f7;
  border: 1px solid var(--separator);
}

[data-theme="dark"] .cn-network-note {
  background: #3a3a3c;
}

.cn-network-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--text-secondary);
}

.cn-network-note strong {
  color: var(--text);
}

/* Official doc panel (no video) */
.doc-panel {
  margin-bottom: 48px;
  padding: 28px 24px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--separator);
  box-shadow: var(--shadow-card);
}

.doc-panel-title {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.022em;
  margin: 0 0 8px;
}

.doc-panel-lead {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-secondary);
}

.doc-link-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.doc-link-list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--separator);
}

.doc-link-list li:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.doc-link-list a {
  font-size: 16px;
  font-weight: 600;
  color: var(--blue);
  text-decoration: none;
}

.doc-link-list a:hover {
  text-decoration: underline;
}

.doc-link-hint {
  font-size: 13px;
  color: var(--text-tertiary);
  line-height: 1.4;
}

.media-tile-thumb-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 120px;
  background: linear-gradient(145deg, #e8f4ff, #d4e9fc);
}

.media-tile-thumb-alt {
  background: linear-gradient(145deg, #eef7f0, #ddeee3);
}

.media-tile-brand {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
}

/* Timeline */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--blue), rgba(0, 113, 227, 0.15));
  border-radius: 2px;
}

@media (min-width: 734px) {
  .timeline::before {
    left: 15px;
  }
}

.timeline-item {
  position: relative;
  padding-left: 40px;
  margin-bottom: 28px;
}

@media (min-width: 734px) {
  .timeline-item {
    padding-left: 48px;
  }
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: 4px;
  top: 10px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--surface);
  border: 3px solid var(--blue);
  box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.12);
}

@media (min-width: 734px) {
  .timeline-marker {
    left: 8px;
  }
}

.timeline-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--separator);
  padding: 22px 24px;
  box-shadow: var(--shadow-card);
}

.timeline-era {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 8px;
}

.timeline-title {
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.022em;
  margin: 0 0 12px;
}

.timeline-body {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text-secondary);
}

.timeline-body a {
  color: var(--blue);
  text-decoration: none;
}

.timeline-body a:hover {
  text-decoration: underline;
}

.timeline-bullets {
  margin: 0 0 12px;
  padding-left: 1.2em;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.55;
}

.timeline-bullets li {
  margin-bottom: 8px;
}

.timeline-more {
  margin: 0;
  font-size: 14px;
}

.timeline-more a {
  color: var(--blue);
  font-weight: 500;
  text-decoration: none;
}

.timeline-more a:hover {
  text-decoration: underline;
}

.checklist-tight {
  max-width: none;
}

/* Theme Toggle Button */
.theme-toggle {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--separator);
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  z-index: 1000;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.15);
}

[data-theme="dark"] .theme-toggle {
  background: var(--bg-tint);
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 80px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--blue);
  border: none;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--blue-hover);
}

/* Loading skeleton for iframes */
.video-frame {
  position: relative;
}

.video-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--bg-tint) 25%, var(--separator) 50%, var(--bg-tint) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  z-index: 1;
  border-radius: inherit;
}

.video-frame.loaded::before {
  display: none;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Print Styles */
@media print {
  *,
  *::before,
  *::after {
    background: transparent !important;
    color: #000 !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
  }

  .site-header,
  .theme-toggle,
  .back-to-top,
  .video-frame iframe,
  .hero-visual {
    display: none !important;
  }

  .section {
    padding: 20px 0;
    page-break-inside: avoid;
  }

  .container {
    width: 100%;
    max-width: none;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666 !important;
  }

  .btn {
    border: 1px solid #000;
    padding: 4px 8px;
  }

  .compare-table,
  .kbd-table {
    border: 1px solid #000;
  }

  .compare-table th,
  .compare-table td,
  .kbd-table th,
  .kbd-table td {
    border: 1px solid #000;
    padding: 8px;
  }

  .timeline::before {
    background: #000;
  }

  .timeline-marker {
    border-color: #000;
  }

  h1, h2, h3 {
    page-break-after: avoid;
  }

  .bento-card,
  .insight-card,
  .timeline-card,
  .diagram-card {
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }
}

/* Language Switch */
.lang-switch {
  display: flex;
  align-items: center;
}

.lang-switch a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 6px;
  border: 1px solid var(--separator);
  transition: all 0.2s ease;
}

.lang-switch a:hover {
  color: var(--blue);
  border-color: var(--blue);
  background: rgba(0, 113, 227, 0.06);
}

/* Scroll Animation */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger animation for bento grid */
.bento .animate-on-scroll:nth-child(1) { transition-delay: 0s; }
.bento .animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.bento .animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.bento .animate-on-scroll:nth-child(4) { transition-delay: 0.3s; }
.bento .animate-on-scroll:nth-child(5) { transition-delay: 0.4s; }
.bento .animate-on-scroll:nth-child(6) { transition-delay: 0.5s; }

/* Timeline animation */
.timeline-item {
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.timeline-item.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.timeline-item:nth-child(1) { transition-delay: 0s; }
.timeline-item:nth-child(2) { transition-delay: 0.15s; }
.timeline-item:nth-child(3) { transition-delay: 0.3s; }
.timeline-item:nth-child(4) { transition-delay: 0.45s; }

/* Insight cards animation */
.insight-card {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.insight-card.is-visible {
  opacity: 1;
  transform: scale(1);
}

.insight-cards .insight-card:nth-child(1) { transition-delay: 0s; }
.insight-cards .insight-card:nth-child(2) { transition-delay: 0.1s; }
.insight-cards .insight-card:nth-child(3) { transition-delay: 0.2s; }

/* Hero entrance animation */
.hero-copy {
  animation: fadeInUp 0.8s ease-out;
}

.hero-visual {
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Device float animation */
.hero-visual {
  animation: fadeInUp 0.8s ease-out 0.2s both, float 6s ease-in-out infinite 1s;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .animate-on-scroll,
  .timeline-item,
  .insight-card {
    opacity: 1;
    transform: none;
  }
}

/* Feature Grid */
.feature-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}

@media (min-width: 734px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .feature-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.feature-card {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--separator);
  box-shadow: var(--shadow-card);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.08);
}

.feature-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.feature-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.feature-date {
  font-size: 12px;
  color: var(--text-tertiary);
}

.feature-version {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 980px;
  background: rgba(0, 113, 227, 0.1);
  color: var(--blue);
}

.feature-card h3 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.022em;
  margin: 0 0 8px;
}

.feature-card p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-secondary);
}

.feature-card a {
  font-size: 14px;
  font-weight: 500;
  color: var(--blue);
  text-decoration: none;
}

.feature-card a:hover {
  text-decoration: underline;
}

/* Pricing Grid */
.pricing-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr;
}

@media (min-width: 734px) {
  .pricing-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pricing-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--separator);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}

.pricing-featured {
  border-color: var(--blue);
  border-width: 2px;
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--blue);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 16px;
  border-radius: 980px;
}

.pricing-header {
  margin-bottom: 20px;
}

.pricing-header h3 {
  font-size: 21px;
  font-weight: 600;
  margin: 0 0 8px;
}

.pricing-price {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.pricing-price span {
  font-size: 16px;
  font-weight: 400;
  color: var(--text-secondary);
}

.pricing-features {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  flex: 1;
}

.pricing-features li {
  padding: 8px 0;
  font-size: 15px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--separator);
}

.pricing-features li:last-child {
  border-bottom: none;
}

.pricing-features li::before {
  content: "✓ ";
  color: #34c759;
  font-weight: 600;
}

.pricing-card .btn {
  width: 100%;
  text-align: center;
}

.pricing-note {
  margin-top: 32px;
  text-align: center;
  font-size: 14px;
  color: var(--text-secondary);
}

.pricing-note a {
  color: var(--blue);
  text-decoration: none;
}

.pricing-note a:hover {
  text-decoration: underline;
}

/* Animation for new sections */
.feature-card {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.feature-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.feature-card:nth-child(1) { transition-delay: 0s; }
.feature-card:nth-child(2) { transition-delay: 0.05s; }
.feature-card:nth-child(3) { transition-delay: 0.1s; }
.feature-card:nth-child(4) { transition-delay: 0.15s; }
.feature-card:nth-child(5) { transition-delay: 0.2s; }
.feature-card:nth-child(6) { transition-delay: 0.25s; }
.feature-card:nth-child(7) { transition-delay: 0.3s; }
.feature-card:nth-child(8) { transition-delay: 0.35s; }

.pricing-card {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.pricing-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.pricing-card:nth-child(1) { transition-delay: 0s; }
.pricing-card:nth-child(2) { transition-delay: 0.1s; }
.pricing-card:nth-child(3) { transition-delay: 0.2s; }
.pricing-card:nth-child(4) { transition-delay: 0.3s; }
.pricing-card:nth-child(5) { transition-delay: 0.4s; }
.pricing-card:nth-child(6) { transition-delay: 0.5s; }

/* ── 动态流光壁纸与噪点 ─────────────────────── */
.bg-blobs {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
}

.blob {
  position: absolute;
  filter: blur(90px);
  opacity: 0.42;
  will-change: transform, border-radius;
}

[data-theme="dark"] .blob {
  opacity: 0.52;
}

.b1 {
  width: 55vw;
  height: 55vw;
  left: -14vw;
  top: -18vw;
  background: radial-gradient(circle at 35% 35%, #ff2d78, rgba(255, 45, 120, 0) 68%);
  animation: drift1 26s ease-in-out infinite alternate;
}

.b2 {
  width: 50vw;
  height: 50vw;
  right: -15vw;
  top: -6vw;
  background: radial-gradient(circle at 60% 40%, #7a5cff, rgba(122, 92, 255, 0) 70%);
  animation: drift2 31s ease-in-out infinite alternate;
}

.b3 {
  width: 45vw;
  height: 45vw;
  left: 18vw;
  bottom: -20vw;
  background: radial-gradient(circle at 50% 50%, #00c8ff, rgba(0, 200, 255, 0) 70%);
  animation: drift3 24s ease-in-out infinite alternate;
}

.b4 {
  width: 25vw;
  height: 25vw;
  right: 15vw;
  bottom: 8vw;
  background: radial-gradient(circle at 50% 50%, #ff9f0a, rgba(255, 159, 10, 0) 70%);
  animation: drift2 19s ease-in-out infinite alternate-reverse;
}

@keyframes drift1 {
  0% { transform: translate(0, 0) scale(1); border-radius: 44% 56% 62% 38% / 48% 42% 58% 52%; }
  100% { transform: translate(8vw, 6vh) scale(1.15); border-radius: 58% 42% 40% 60% / 52% 58% 42% 48%; }
}

@keyframes drift2 {
  0% { transform: translate(0, 0) scale(1.05); border-radius: 52% 48% 44% 56% / 58% 44% 56% 42%; }
  100% { transform: translate(-7vw, 8vh) scale(0.92); border-radius: 40% 60% 58% 42% / 46% 60% 40% 54%; }
}

@keyframes drift3 {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(9vw, -7vh) scale(1.2); }
}

.noise {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.95'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ── 灵动岛悬浮导航 ─────────────────────── */
.island {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 900;
  width: min(840px, calc(100% - 24px));
  border-radius: 999px;
  background: var(--glass);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--gbr);
  box-shadow: inset 0 1px 0 var(--ghi), 0 16px 40px rgba(0, 0, 0, var(--gsh));
  transition: all 0.4s cubic-bezier(0.3, 0.9, 0.3, 1);
  padding: 6px 18px;
}

.island-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
}

.island-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 15.5px;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.island-mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 14px;
  color: #fff;
  background: conic-gradient(from 210deg, var(--blue), var(--purple), var(--pink), var(--orange), var(--blue));
  box-shadow: 0 4px 12px rgba(10, 132, 255, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.island-nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.island-nav a {
  font-size: 13.5px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.25s ease;
  font-weight: 500;
}

.island-nav a:hover {
  color: var(--text);
}

.island-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.is-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
  animation: pulseDot 1.8s ease-in-out infinite;
}

@keyframes pulseDot {
  50% { opacity: 0.35; }
}

@media (max-width: 768px) {
  .island-nav {
    display: none;
  }
}

/* ── 玻璃材质与扫光特效 ─────────────────────── */
.glass {
  position: relative;
  background: var(--glass);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--gbr);
  border-radius: var(--radius-lg);
  box-shadow: inset 0 1px 0 var(--ghi), inset 0 -1px 0 rgba(255, 255, 255, 0.05), 0 20px 50px rgba(0, 0, 0, var(--gsh));
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), background 0.3s, border-color 0.3s;
}

.glass::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.12), transparent 30%);
  pointer-events: none;
}

.shine {
  position: relative;
  overflow: hidden;
}

.shine::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(105deg, transparent 40%, rgba(255, 255, 255, 0.22) 50%, transparent 60%);
  transform: translateX(-130%);
  transition: transform 0.8s ease;
  pointer-events: none;
}

.shine:hover::after {
  transform: translateX(130%);
}

/* ── 粘性堆叠卡片 (Sticky Stacking Cards) ─────────────────────── */
.stack {
  display: flex;
  flex-direction: column;
  gap: 28px;
  position: relative;
}

.stack-card {
  position: sticky;
  top: calc(84px + var(--stack-i, 0) * 20px);
  margin-bottom: 24px;
  border-radius: 26px;
  padding: clamp(24px, 3.5vw, 36px);
  background: var(--glass);
  backdrop-filter: blur(28px) saturate(190%);
  -webkit-backdrop-filter: blur(28px) saturate(190%);
  border: 1px solid var(--gbr);
  box-shadow: inset 0 1px 0 var(--ghi), 0 24px 60px rgba(0, 0, 0, var(--gsh));
  transform-origin: top center;
  transition: transform 0.3s cubic-bezier(0.2, 0.8, 0.3, 1), box-shadow 0.3s;
  will-change: transform;
}

.stack-card:hover {
  transform: translateY(-4px) scale(1.006);
}

.corner-cross {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-tertiary);
  opacity: 0.45;
  pointer-events: none;
}

.corner-cross.tl { top: 12px; left: 16px; }
.corner-cross.tr { top: 12px; right: 16px; }
.corner-cross.bl { bottom: 12px; left: 16px; }
.corner-cross.br { bottom: 12px; right: 16px; }

/* ── 高级按纽 ─────────────────────── */
.btn-p {
  position: relative;
  overflow: hidden;
  border: 0;
  border-radius: 99px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 700;
  color: #ffffff !important;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  box-shadow: 0 12px 32px rgba(10, 132, 255, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.4);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-p:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 18px 44px rgba(10, 132, 255, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.btn-p::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 40%, rgba(255, 255, 255, 0.45) 50%, transparent 60%);
  transform: translateX(-130%);
  animation: btnshine 3.6s ease-in-out infinite;
}

@keyframes btnshine {
  0%, 60% { transform: translateX(-130%); }
  100% { transform: translateX(130%); }
}

.btn-g {
  border-radius: 99px;
  padding: 14px 26px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text) !important;
  background: var(--glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--gbr);
  box-shadow: inset 0 1px 0 var(--ghi);
  transition: transform 0.3s, background 0.3s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-g:hover {
  transform: translateY(-3px);
  background: var(--glass2);
}