/* 制度智能体 — 参考 Fin.ai 的大气企业级落地页 */

:root {
  --bg-deep: #0a0b0f;
  --bg-card: #12141c;
  --bg-elevated: #1a1d28;
  --bg-light: #f6f7fb;
  --text-primary: #f4f5f7;
  --text-secondary: #9ca3b0;
  --text-muted: #6b7280;
  --accent: #5b6cff;
  --accent-soft: rgba(91, 108, 255, 0.15);
  --accent-glow: rgba(91, 108, 255, 0.45);
  --accent-2: #22d3ee;
  --border: rgba(255, 255, 255, 0.08);
  --border-light: #e5e7ef;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  --font: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --max: 1200px;
  --nav-h: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

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

/* —— 导航 —— */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(10, 11, 15, 0.72);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s;
}

.site-header.scrolled {
  background: rgba(10, 11, 15, 0.95);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - 48px, var(--max));
  margin-inline: auto;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
}

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
}

.logo-mark svg {
  display: block;
  width: 100%;
  height: 100%;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color 0.2s;
}

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

.nav-actions {
  display: flex;
  gap: 12px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
  font-family: inherit;
}

.btn:active {
  transform: scale(0.98);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  color: #fff;
  box-shadow: 0 8px 32px var(--accent-glow);
}

.btn-primary:hover {
  box-shadow: 0 12px 40px var(--accent-glow);
}

.btn-outline-light {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
}

.btn-lg {
  padding: 16px 28px;
  font-size: 1rem;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: 100vh;
  padding-top: calc(var(--nav-h) + 80px);
  padding-bottom: 120px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
}

.hero-orb-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent) 0%, transparent 70%);
  top: -10%;
  right: -5%;
}

.hero-orb-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--accent-2) 0%, transparent 70%);
  bottom: 10%;
  left: -10%;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black, transparent);
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid rgba(91, 108, 255, 0.3);
  font-size: 0.8rem;
  color: #a5b4fc;
  margin-bottom: 28px;
}

.hero-badge span.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #4ade80;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.25rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 0 0 24px;
  max-width: 900px;
  margin-inline: auto;
}

.hero h1 .gradient {
  background: linear-gradient(135deg, #fff 30%, #a5b4fc 70%, var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-intro {
  width: 100%;
  margin-bottom: 40px;
  display: flex;
  justify-content: center;
}

.hero-intro-inner {
  width: fit-content;
  max-width: min(720px, 100%);
  text-align: left;
}

.hero-intro-list {
  list-style: disc;
  list-style-position: outside;
  padding-left: 1.35em;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.hero-intro-list li::marker {
  color: var(--accent-2);
}

.hero-intro-text {
  margin: 0;
  font-size: clamp(0.9375rem, 1.6vw, 1.0625rem);
  line-height: 1.75;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
  text-align: left;
}

.hero-intro-em {
  color: var(--text-primary);
  font-weight: 600;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-content .hero-intro-inner,
.hero-content .hero-intro-inner li {
  text-align: left;
}

.hero-intro-foot {
  margin: 14px 0 0;
  padding-left: 1.35em;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  text-align: center;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px 16px;
  margin-bottom: 64px;
}

.btn-hero-main {
  position: relative;
  z-index: 0;
  padding: 18px 40px;
  font-size: 1.0625rem;
  letter-spacing: 0.04em;
  color: #fff;
  background: linear-gradient(135deg, var(--accent) 0%, #7c3aed 45%, var(--accent-2) 100%);
  background-size: 200% 200%;
  box-shadow:
    0 12px 40px rgba(91, 108, 255, 0.45),
    0 0 0 1px rgba(255, 255, 255, 0.12) inset;
  animation: hero-cta-shine 6s ease infinite;
}

.btn-hero-main::before {
  content: "";
  position: absolute;
  inset: -3px;
  z-index: -1;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  opacity: 0.55;
  filter: blur(14px);
  transition: opacity 0.2s;
}

.btn-hero-main:hover {
  box-shadow:
    0 16px 48px rgba(91, 108, 255, 0.55),
    0 0 0 1px rgba(255, 255, 255, 0.18) inset;
  transform: translateY(-1px);
}

.btn-hero-main:hover::before {
  opacity: 0.75;
}

.btn-hero-main:active {
  transform: translateY(0) scale(0.98);
}

.hero-cta .btn-ghost {
  color: var(--text-secondary);
  border-color: rgba(255, 255, 255, 0.1);
}

.hero-cta .btn-ghost:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.btn-hero-secondary {
  background: rgba(91, 108, 255, 0.14);
  color: var(--text-primary);
  border: 1px solid rgba(91, 108, 255, 0.38);
  box-shadow: none;
}

.btn-hero-secondary:hover {
  background: rgba(91, 108, 255, 0.22);
  border-color: rgba(91, 108, 255, 0.52);
}

@keyframes hero-cta-shine {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 720px;
  margin-inline: auto;
  padding: 32px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
}

.stat-item strong {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.stat-item span {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.hero-visual {
  margin-top: 80px;
  position: relative;
  text-align: left;
}

.mock-showcase {
  max-width: 1120px;
  margin-inline: auto;
}

.mock-showcase-head {
  text-align: center;
  margin-bottom: 20px;
}

.mock-showcase-label {
  margin: 0 0 8px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-2);
}

.mock-scene-title {
  margin: 0 0 16px;
  font-size: clamp(1.125rem, 2.2vw, 1.375rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  transition: opacity 0.25s ease;
}

.mock-scene-title.is-changing {
  opacity: 0.35;
}

.mock-scene-tabs {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  padding: 4px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.mock-scene-tab {
  padding: 8px 18px;
  border: none;
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  cursor: pointer;
  transition: color 0.2s, background 0.2s, box-shadow 0.2s;
}

.mock-scene-tab:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.mock-scene-tab[aria-selected="true"] {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  box-shadow: 0 4px 16px rgba(91, 108, 255, 0.35);
}

.mock-carousel {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mock-carousel-viewport {
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.mock-carousel-track {
  display: flex;
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

.mock-panel {
  flex: 0 0 100%;
  min-width: 0;
}

.mock-carousel-nav {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}

.mock-carousel-nav:hover {
  background: rgba(91, 108, 255, 0.15);
  border-color: rgba(91, 108, 255, 0.4);
}

.mock-carousel-nav:active {
  transform: scale(0.96);
}

.mock-carousel-nav:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}

.mock-window {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.mock-titlebar {
  display: flex;
  gap: 8px;
  padding: 14px 18px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.mock-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #374151;
}

.mock-dot:nth-child(1) { background: #ef4444; }
.mock-dot:nth-child(2) { background: #f59e0b; }
.mock-dot:nth-child(3) { background: #22c55e; }

.mock-body {
  padding: 28px;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 20px;
  min-height: 400px;
  align-items: stretch;
}

.mock-sidebar {
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.12) transparent;
}

.mock-doc {
  padding: 9px 12px;
  border-radius: 8px;
  background: var(--bg-elevated);
  font-size: 0.72rem;
  line-height: 1.4;
  color: var(--text-secondary);
  border-left: 3px solid transparent;
  transition: opacity 0.2s, border-color 0.2s, color 0.2s;
}

.mock-doc-active {
  border-left-color: var(--accent);
  background: rgba(91, 108, 255, 0.12);
  color: var(--text-primary);
}

.mock-doc-inactive {
  opacity: 0.38;
  color: var(--text-muted);
}

.mock-chat {
  background: var(--bg-elevated);
  border-radius: 12px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  overflow: hidden;
  min-width: 0;
}

.mock-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px 12px;
  background: rgba(91, 108, 255, 0.06);
  border: 1px solid rgba(91, 108, 255, 0.18);
  border-radius: 12px;
  min-width: 0;
}

.mock-features-title {
  margin: 0;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
}

.mock-features-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mock-feature-item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.mock-feature-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
}

.mock-feature-item strong {
  display: block;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  line-height: 1.35;
}

.mock-feature-item p {
  margin: 0;
  font-size: 0.68rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

.bubble {
  padding: 10px 12px;
  border-radius: 12px;
  font-size: 0.76rem;
  line-height: 1.55;
  max-width: 92%;
}

.bubble-user {
  align-self: flex-end;
  background: var(--accent);
  color: #fff;
}

.bubble-ai {
  align-self: flex-start;
  text-align: left;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.bubble-ai p {
  margin: 0 0 0.65em;
}

.bubble-ai p:last-child {
  margin-bottom: 0;
}

.bubble-ai ol {
  margin: 0.4em 0 0.65em;
  padding-left: 1.35em;
}

.bubble-ai li {
  margin-bottom: 0.35em;
  padding-left: 0.15em;
}

.bubble-ai li:last-child {
  margin-bottom: 0;
}

.bubble-ai strong {
  color: var(--text-primary);
  font-weight: 600;
}

.bubble-note {
  font-size: 0.76rem;
  color: var(--text-muted);
}

.bubble-cite {
  display: block;
  margin-top: 10px;
  font-size: 0.72rem;
  color: #a5b4fc;
}

/* —— 通用区块 —— */
section {
  padding: 100px 0;
}

.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  line-height: 1.15;
}

.section-desc {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 560px;
  margin: 0 0 48px;
}

/* —— Flywheel 能力环 —— */
.flywheel {
  background: linear-gradient(180deg, var(--bg-deep) 0%, #0f1118 100%);
}

.flywheel-header {
  text-align: center;
  margin-bottom: 64px;
}

.flywheel-header .section-desc {
  margin-inline: auto;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step-card {
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.3s, transform 0.3s;
}

.step-card:hover {
  border-color: rgba(91, 108, 255, 0.4);
  transform: translateY(-4px);
}

.step-num {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 16px;
}

.step-card h3 {
  margin: 0 0 10px;
  font-size: 1.15rem;
}

.step-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.steps-callout {
  margin: 28px auto 0;
  max-width: 720px;
  padding: 16px 24px;
  text-align: center;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text-primary);
  background: rgba(91, 108, 255, 0.1);
  border: 1px solid rgba(91, 108, 255, 0.28);
  border-radius: var(--radius);
}

/* —— 功能 —— */
.features {
  background: linear-gradient(180deg, #0f1118 0%, var(--bg-deep) 50%, #0f1118 100%);
  position: relative;
  overflow: hidden;
}

.features::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 50% at 50% 50%, black, transparent);
  pointer-events: none;
}

.features .container {
  position: relative;
  z-index: 1;
}

.features .section-label {
  color: var(--accent);
}

.features .section-desc {
  color: var(--text-secondary);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  --feature-accent: var(--accent);
  --feature-accent-2: var(--accent-2);
  position: relative;
  overflow: hidden;
  padding: 28px 28px 32px;
  background: linear-gradient(
    155deg,
    color-mix(in srgb, var(--feature-accent) 14%, transparent) 0%,
    var(--bg-card) 42%,
    var(--bg-elevated) 100%
  );
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition:
    border-color 0.35s,
    transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.35s;
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--feature-accent) 35%,
    var(--feature-accent-2) 65%,
    transparent
  );
  opacity: 0.55;
  transition: opacity 0.35s;
}

.feature-card::after {
  content: "";
  position: absolute;
  width: 160px;
  height: 160px;
  top: -48px;
  right: -48px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    color-mix(in srgb, var(--feature-accent) 28%, transparent) 0%,
    transparent 70%
  );
  pointer-events: none;
  opacity: 0.6;
  transition: opacity 0.35s, transform 0.35s;
}

.feature-card:nth-child(1) {
  --feature-accent: #5b6cff;
  --feature-accent-2: #818cf8;
}

.feature-card:nth-child(2) {
  --feature-accent: #22d3ee;
  --feature-accent-2: #67e8f9;
}

.feature-card:nth-child(3) {
  --feature-accent: #a78bfa;
  --feature-accent-2: #c4b5fd;
}

.feature-card:nth-child(4) {
  --feature-accent: #34d399;
  --feature-accent-2: #6ee7b7;
}

.feature-card:nth-child(5) {
  --feature-accent: #f472b6;
  --feature-accent-2: #f9a8d4;
}

.feature-card:nth-child(6) {
  --feature-accent: #fbbf24;
  --feature-accent-2: #fcd34d;
}

.feature-card:hover {
  border-color: color-mix(in srgb, var(--feature-accent) 50%, transparent);
  transform: translateY(-6px);
  box-shadow:
    0 20px 50px rgba(0, 0, 0, 0.35),
    0 0 40px color-mix(in srgb, var(--feature-accent) 18%, transparent);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-card:hover::after {
  opacity: 1;
  transform: scale(1.15);
}

.feature-card-num {
  position: absolute;
  top: 22px;
  right: 22px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
  color: color-mix(in srgb, var(--feature-accent) 35%, transparent);
  z-index: 1;
}

.feature-icon-wrap {
  position: relative;
  z-index: 1;
  width: 52px;
  height: 52px;
  margin-bottom: 22px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--feature-accent) 35%, transparent),
    color-mix(in srgb, var(--feature-accent-2) 15%, transparent)
  );
  border: 1px solid color-mix(in srgb, var(--feature-accent) 40%, transparent);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.12),
    0 8px 24px color-mix(in srgb, var(--feature-accent) 25%, transparent);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.35s;
}

.feature-card:hover .feature-icon-wrap {
  transform: scale(1.06) rotate(-2deg);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    0 12px 32px color-mix(in srgb, var(--feature-accent) 35%, transparent);
}

.feature-icon {
  font-size: 1.35rem;
  line-height: 1;
  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.25));
}

.feature-card h3 {
  position: relative;
  z-index: 1;
  margin: 0 0 12px;
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  padding-right: 2rem;
}

.feature-card p {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

@media (prefers-reduced-motion: reduce) {
  .feature-card,
  .feature-card::after,
  .feature-icon-wrap {
    transition: none;
  }

  .feature-card:hover {
    transform: none;
  }

  .feature-card:hover .feature-icon-wrap {
    transform: none;
  }
}

/* —— 价值 —— */
.value-section {
  background: var(--bg-deep);
}

.value-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.value-list {
  list-style: none;
  padding: 0;
  margin: 32px 0 0;
}

.value-list li {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.value-list li:last-child {
  border-bottom: none;
}

.value-check {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: rgba(34, 211, 238, 0.15);
  color: var(--accent-2);
  display: grid;
  place-items: center;
  font-weight: 700;
}

.value-chart {
  background: linear-gradient(160deg, rgba(91, 108, 255, 0.08) 0%, var(--bg-card) 45%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px 28px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.value-chart-title {
  margin: 0 0 8px;
  font-size: 1.25rem;
  font-weight: 700;
}

.bar-chart {
  position: relative;
  margin-top: 20px;
  padding-left: 40px;
}

.bar-chart-grid {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 52px;
  width: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-end;
  padding-right: 8px;
  pointer-events: none;
}

.bar-chart-grid span {
  font-size: 0.65rem;
  color: var(--text-muted);
  line-height: 1;
}

.bar-chart-bars {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  height: 220px;
  position: relative;
  background-image: repeating-linear-gradient(
    to top,
    transparent 0,
    transparent calc(25% - 1px),
    rgba(255, 255, 255, 0.05) calc(25% - 1px),
    rgba(255, 255, 255, 0.05) 25%
  );
  border-radius: 8px;
}

.bar-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 0;
  z-index: 1;
}

.bar-value {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.bar-item-featured .bar-value {
  font-size: 0.95rem;
  color: var(--accent-2);
  text-shadow: 0 0 20px rgba(34, 211, 238, 0.35);
}

.bar-track {
  width: 100%;
  max-width: 72px;
  height: 180px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 10px 10px 4px 4px;
  padding: 4px 4px 0;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.bar-fill {
  width: 100%;
  height: var(--h);
  min-height: 8px;
  border-radius: 6px 6px 2px 2px;
  transform-origin: bottom;
  animation: bar-grow 1s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  transform: scaleY(0);
}

.bar-fill-1 {
  background: linear-gradient(180deg, #6b7280 0%, #4b5563 100%);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  animation-delay: 0.08s;
}

.bar-fill-2 {
  background: linear-gradient(180deg, #818cf8 0%, #6366f1 55%, #4f46e5 100%);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.25);
  animation-delay: 0.2s;
}

.bar-fill-3 {
  animation-delay: 0.35s;
  background: linear-gradient(180deg, var(--accent-2) 0%, var(--accent) 50%, #4338ca 100%);
  box-shadow:
    0 0 24px rgba(91, 108, 255, 0.45),
    0 4px 20px rgba(34, 211, 238, 0.2);
  position: relative;
}

.bar-fill-3::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.25) 0%, transparent 40%);
  pointer-events: none;
}

.bar-item-featured .bar-track {
  max-width: 80px;
  border-color: rgba(91, 108, 255, 0.35);
  background: rgba(91, 108, 255, 0.08);
}

.bar-label {
  margin-top: 12px;
  font-size: 0.72rem;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.35;
  max-width: 100%;
}

.bar-item-featured .bar-label {
  color: var(--text-primary);
  font-weight: 600;
}

@keyframes bar-grow {
  from {
    transform: scaleY(0);
  }
  to {
    transform: scaleY(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .bar-fill {
    animation: none;
    transform: scaleY(1);
  }
}

/* —— AI 引擎 —— */
.engine {
  background: #0f1118;
  text-align: center;
}

.engine-pipeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  justify-content: center;
  gap: 12px;
  margin-top: 48px;
}

.engine-step {
  padding: 20px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.8rem;
}

.engine-step .num {
  display: block;
  font-size: 0.65rem;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 8px;
}

.engine-step strong {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 6px;
}

.engine-step p {
  margin: 0;
  font-size: 0.72rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* —— 定价 —— */
.pricing {
  background: var(--bg-deep);
}

.pricing-header {
  text-align: center;
  margin-bottom: 56px;
}

.pricing-header .section-desc {
  margin-inline: auto;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}

.price-card {
  padding: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  position: relative;
}

.price-card.featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 24px 60px var(--accent-glow);
  transform: scale(1.02);
}

.price-card-trial {
  border-color: rgba(34, 211, 238, 0.35);
  background: linear-gradient(180deg, rgba(34, 211, 238, 0.06) 0%, var(--bg-card) 48%);
}

.price-badge-trial {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
}

.price-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 999px;
}

.price-card h3 {
  margin: 0 0 8px;
  font-size: 1.25rem;
}

.price-amount {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 16px 0 4px;
}

.price-amount small {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.price-meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

.price-features {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  flex: 1;
}

.price-features li {
  padding: 10px 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 10px;
}

.price-features li::before {
  content: "✓";
  color: #4ade80;
  font-weight: 700;
}

.plan-detail-card {
  position: relative;
  padding: 28px 148px 28px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color 0.3s, transform 0.3s;
}

.plan-detail-card-trial {
  border-color: rgba(34, 211, 238, 0.35);
  background: linear-gradient(180deg, rgba(34, 211, 238, 0.05) 0%, var(--bg-card) 40%);
}

.plan-detail-card-featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(91, 108, 255, 0.35);
}

.plan-detail-card-standard {
  border-color: rgba(255, 255, 255, 0.22);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.1);
}

.plan-detail-tag {
  margin: 0 0 12px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-2);
  line-height: 1.5;
}

.plan-detail-card h3 {
  margin: 0 0 4px;
  font-size: 1.25rem;
}

.plan-detail-price {
  margin: 0 0 20px;
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.plan-detail-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.plan-detail-list li {
  padding: 12px 0;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  display: flex;
  gap: 10px;
}

.plan-detail-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.plan-detail-list li::before {
  content: "·";
  flex-shrink: 0;
  color: var(--accent-2);
  font-weight: 700;
  line-height: 1.65;
}

.plan-detail-card-qr {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 1;
}

/* —— 服务专员二维码 —— */
.service-qr-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
}

.service-qr-block img {
  display: block;
  width: 120px;
  height: 120px;
  object-fit: contain;
  border-radius: 8px;
  background: #fff;
  padding: 4px;
}

.service-qr-label {
  margin: 0;
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--text-secondary);
}

.service-qr-block--corner img {
  width: 130px;
  height: 130px;
}

.service-qr-block--corner .service-qr-label {
  font-size: 0.7rem;
}

.service-qr-block--float {
  padding: 4px 0 0;
}

.service-qr-block--float img {
  width: 140px;
  height: 140px;
}

.service-qr-block--float .service-qr-label {
  font-size: 0.8rem;
  max-width: none;
  white-space: nowrap;
}

.service-qr-mount {
  margin-top: 16px;
}

.about-mini-contact .service-qr-block img {
  width: 108px;
  height: 108px;
}

/* —— 右下角固定服务专员二维码 —— */
.kf-float {
  position: fixed;
  right: 20px;
  bottom: 24px;
  z-index: 90;
  padding: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.kf-float .service-qr-block--float {
  min-width: 140px;
}

.trial-banner {
  margin-top: 48px;
  padding: 40px 48px;
  background: linear-gradient(135deg, rgba(91, 108, 255, 0.2), rgba(34, 211, 238, 0.1));
  border: 1px solid rgba(91, 108, 255, 0.35);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.trial-banner h3 {
  margin: 0 0 8px;
  font-size: 1.5rem;
}

.trial-banner p {
  margin: 0;
  color: var(--text-secondary);
}

/* —— 流程 —— */
.workflow {
  background: linear-gradient(180deg, var(--bg-deep) 0%, #0f1219 50%, var(--bg-deep) 100%);
  border-top: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.workflow::after {
  content: "";
  position: absolute;
  width: 480px;
  height: 480px;
  right: -12%;
  top: 20%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(91, 108, 255, 0.12) 0%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
}

.workflow .container {
  position: relative;
  z-index: 1;
}

.workflow .section-desc {
  color: var(--text-secondary);
}

.workflow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: wf;
}

.wf-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  padding-top: 36px;
  position: relative;
  transition: border-color 0.3s, transform 0.3s;
}

.wf-card:hover {
  border-color: rgba(91, 108, 255, 0.4);
  transform: translateY(-4px);
}

.wf-card::before {
  counter-increment: wf;
  content: counter(wf);
  position: absolute;
  top: -14px;
  left: 24px;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  color: #fff;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 0.85rem;
  box-shadow: 0 6px 20px var(--accent-glow);
}

.wf-card h3 {
  margin: 12px 0 8px;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.wf-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

/* —— 公司 —— */
.about {
  background: var(--bg-deep);
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  margin: 0 0 16px;
}

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

.about-mini {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.about-mini strong {
  display: block;
  margin-bottom: 6px;
}

.about-mini span {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* —— CTA —— */
.cta-footer {
  padding: 100px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-footer .hero-orb {
  opacity: 0.35;
}

.cta-footer h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin: 0 0 20px;
  position: relative;
}

.cta-footer p {
  color: var(--text-secondary);
  margin-bottom: 32px;
  position: relative;
}

.cta-footer .hero-cta {
  position: relative;
}

/* —— 页脚 —— */
.site-footer {
  padding: 48px 0 32px;
  border-top: 1px solid var(--border);
  background: #08090c;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}

.footer-grid h4 {
  margin: 0 0 16px;
  font-size: 0.85rem;
}

.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-grid li {
  margin-bottom: 10px;
}

.footer-grid a {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.footer-grid a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-icp {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-icp:hover {
  color: var(--text-secondary);
}

/* —— 弹窗 —— */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: min(100%, 560px);
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
  transform: translateY(20px) scale(0.96);
  transition: transform 0.3s;
}

.modal-overlay.open .modal {
  transform: translateY(0) scale(1);
}

.modal-wide {
  width: min(100%, 720px);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 28px 28px 0;
}

.modal-header h2 {
  margin: 0 0 6px;
  font-size: 1.35rem;
}

.modal-header p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.modal-close {
  background: rgba(255, 255, 255, 0.06);
  border: none;
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.25rem;
  line-height: 1;
  flex-shrink: 0;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.modal-body {
  padding: 24px 28px 28px;
}

.price-highlight {
  text-align: center;
  padding: 24px;
  background: var(--bg-elevated);
  border-radius: var(--radius);
  margin-bottom: 24px;
}

.price-highlight .amount {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent-2);
}

.price-highlight .meta {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 8px;
}

.limit-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 16px;
}

.tag {
  padding: 6px 12px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 999px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.payment-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.payment-tab {
  flex: 1;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.payment-tab.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: #fff;
}

.qr-panel {
  text-align: center;
  padding: 24px;
  background: #fff;
  border-radius: var(--radius);
}

.qr-panel img,
.qr-placeholder {
  width: 200px;
  height: 200px;
  margin: 0 auto 16px;
  border-radius: 8px;
}

.qr-placeholder {
  background: #f3f4f6;
  display: grid;
  place-items: center;
  color: #9ca3af;
  font-size: 0.8rem;
  border: 2px dashed #d1d5db;
}

.qr-panel p {
  margin: 0;
  color: #374151;
  font-size: 0.9rem;
}

.payment-link-box {
  margin-top: 16px;
  padding: 14px;
  background: var(--bg-elevated);
  border-radius: 10px;
  font-size: 0.85rem;
  word-break: break-all;
}

.payment-link-box a {
  color: var(--accent-2);
}

.modal-note {
  margin-top: 20px;
  padding: 16px;
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.2);
  border-radius: 10px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.buy-plan-detail {
  margin-bottom: 20px;
}

.buy-plan-detail:empty {
  display: none;
  margin: 0;
}

.buy-plan-detail .plan-detail-card {
  width: 100%;
}

@media (max-width: 640px) {
  .plan-detail-card {
    padding: 20px 20px 168px;
  }

  .plan-detail-card-qr {
    top: auto;
    right: auto;
    left: 50%;
    bottom: 16px;
    transform: translateX(-50%);
  }

  .kf-float {
    right: 12px;
    bottom: 16px;
    padding: 12px;
  }
}

.package-picker {
  display: grid;
  gap: 12px;
  margin-bottom: 20px;
}

.package-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: border-color 0.2s;
}

.package-option:hover,
.package-option.selected {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.package-option-trial.selected,
.package-option-trial:hover {
  border-color: rgba(34, 211, 238, 0.5);
  background: rgba(34, 211, 238, 0.08);
}

.package-option input {
  display: none;
}

/* —— 扫码试用 Demo —— */
.demo-trial {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--bg-deep) 0%, #0f1219 50%, var(--bg-deep) 100%);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.demo-trial-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}

.demo-trial-header .section-desc {
  margin-inline: auto;
}

.demo-model-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.demo-model-card {
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.demo-model-card-accent {
  border-color: rgba(91, 108, 255, 0.45);
  background: linear-gradient(145deg, rgba(91, 108, 255, 0.12), var(--bg-card));
}

.demo-model-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-bottom: 10px;
}

.demo-model-card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.demo-model-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.demo-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 32px;
}

.demo-filter-btn {
  padding: 8px 18px;
  font-size: 0.875rem;
  font-weight: 500;
  font-family: inherit;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.demo-filter-btn:hover {
  color: var(--text-primary);
  border-color: rgba(91, 108, 255, 0.4);
}

.demo-filter-btn.active {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.demo-card {
  display: flex;
  flex-direction: column;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color 0.3s, transform 0.3s;
}

.demo-card:hover {
  border-color: rgba(91, 108, 255, 0.45);
  transform: translateY(-4px);
}

.demo-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.demo-card-region,
.demo-card-domain {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
}

.demo-card-region {
  color: var(--accent-2);
  background: rgba(34, 211, 238, 0.12);
}

.demo-card-domain {
  color: #a5b4fc;
  background: var(--accent-soft);
}

.demo-card h3 {
  margin: 0 0 6px;
  font-size: 1.1rem;
  line-height: 1.35;
}

.demo-card-dept {
  margin: 0 0 10px;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
}

.demo-card-desc {
  margin: 0 0 8px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  flex: 1;
}

.demo-card-hint {
  margin: 0 0 16px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.demo-card-qr {
  text-align: center;
  padding: 16px;
  background: #fff;
  border-radius: 12px;
  margin-bottom: 12px;
}

.demo-card-qr img {
  width: 160px;
  height: 160px;
  margin: 0 auto;
  border-radius: 6px;
}

.demo-card-qr .qr-placeholder {
  width: 160px;
  height: 160px;
  margin: 0 auto 8px;
  font-size: 0.75rem;
}

.demo-card-qr-label {
  margin: 0;
  font-size: 0.8rem;
  color: #6b7280;
}

.demo-card-free {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-bottom: 12px;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #34d399;
  background: rgba(52, 211, 153, 0.12);
  border-radius: 999px;
  align-self: flex-start;
}

.demo-card-link {
  display: block;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-2);
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: background 0.2s, border-color 0.2s;
}

.demo-card-link:hover {
  background: var(--accent-soft);
  border-color: rgba(91, 108, 255, 0.4);
}

.demo-footnote {
  margin: 32px 0 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.demo-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px 24px;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}

/* —— 响应式 —— */
@media (max-width: 1024px) {
  .steps-grid,
  .engine-pipeline {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-grid,
  .pricing-grid,
  .demo-grid,
  .demo-model-grid {
    grid-template-columns: 1fr;
  }

  .price-card.featured {
    transform: none;
  }

  .value-grid,
  .about-grid {
    grid-template-columns: 1fr;
  }

  .mock-body {
    grid-template-columns: 1fr;
  }

  .mock-features {
    order: 3;
  }

  .mock-carousel-nav {
    display: none;
  }

  .mock-carousel {
    gap: 0;
  }
}

@media (max-width: 768px) {
  .nav-inner {
    justify-content: flex-start;
    gap: 8px;
  }

  .nav-brand {
    gap: 8px;
    margin-right: auto;
  }

  .nav-brand .logo > span:not(.logo-mark) {
    display: none;
  }

  .nav-links,
  .nav-actions .btn-ghost {
    display: none;
  }

  .nav-actions {
    gap: 0;
    flex-shrink: 0;
  }

  .nav-actions .btn-primary {
    padding: 10px 16px;
    font-size: 0.85rem;
    white-space: nowrap;
  }

  .menu-toggle {
    display: block;
    flex-shrink: 0;
    padding: 0;
    margin-left: 4px;
  }

  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: var(--bg-deep);
    padding: 24px;
    border-bottom: 1px solid var(--border);
    gap: 16px;
  }

  .hero-intro-inner {
    max-width: 100%;
  }

  .hero-cta {
    gap: 12px;
  }

  .btn-hero-main {
    width: 100%;
    max-width: 320px;
  }

  .hero-cta .btn-hero-secondary,
  .hero-cta .btn-ghost {
    flex: 1;
    min-width: 0;
  }

  .hero-stats {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .steps-grid,
  .workflow-steps,
  .engine-pipeline {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .trial-banner {
    flex-direction: column;
    text-align: center;
  }
}