/* ==========================================================================
   起心动念 · Momentum — 官网与市场页（Pricing / Download）共用高定样式
   零第三方依赖，纯原生 CSS，支持 Dark/Light 响应与顶级微质感动效
   ========================================================================== */

:root {
  color-scheme: dark;
  --bg: #090d16;
  --bg-gradient: radial-gradient(circle at 50% 0%, rgba(16, 185, 129, 0.12) 0%, rgba(9, 13, 22, 0) 65%),
                 radial-gradient(circle at 100% 30%, rgba(59, 130, 246, 0.05) 0%, transparent 40%),
                 #090d16;
  --card: #131926;
  --card-glass: rgba(19, 25, 38, 0.75);
  --card-hover: #172033;
  --chip: rgba(255, 255, 255, 0.06);
  --chip-hover: rgba(255, 255, 255, 0.10);
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.14);
  --line-subtle: rgba(255, 255, 255, 0.04);
  --ink: #f3f4f6;
  --ink-hi: #ffffff;
  --ink2: #cbd5e1;
  --ink3: #94a3b8;
  --ink-faint: #64748b;
  --accent: #10b981;
  --accent-hi: #34d399;
  --accent-glow: rgba(16, 185, 129, 0.22);
  --accent-border: rgba(16, 185, 129, 0.38);
  --accent-chip: rgba(16, 185, 129, 0.12);
  --warn: #f59e0b;
  --danger: #f43f5e;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.65);
  --shadow-glow: 0 0 40px rgba(16, 185, 129, 0.25);
  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f8fafc;
  --bg-gradient: radial-gradient(circle at 50% 0%, rgba(16, 185, 129, 0.08) 0%, rgba(248, 250, 252, 0) 65%),
                 #f8fafc;
  --card: #ffffff;
  --card-glass: rgba(255, 255, 255, 0.85);
  --card-hover: #f1f5f9;
  --chip: rgba(0, 0, 0, 0.04);
  --chip-hover: rgba(0, 0, 0, 0.07);
  --line: rgba(0, 0, 0, 0.08);
  --line-strong: rgba(0, 0, 0, 0.14);
  --line-subtle: rgba(0, 0, 0, 0.04);
  --ink: #0f172a;
  --ink-hi: #020617;
  --ink2: #334155;
  --ink3: #64748b;
  --ink-faint: #94a3b8;
  --accent: #059669;
  --accent-hi: #10b981;
  --accent-glow: rgba(5, 150, 105, 0.12);
  --accent-border: rgba(5, 150, 105, 0.28);
  --accent-chip: rgba(5, 150, 105, 0.08);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.08);
  --shadow-glow: 0 0 32px rgba(5, 150, 105, 0.12);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  background-image: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--ink);
  line-height: 1.6;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* ==========================================================================
   全站统一导航栏 (Site Header)
   ========================================================================== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: var(--card-glass);
  border-bottom: 1px solid var(--line-subtle);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.site-nav-in {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-anchor {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--ink-hi);
  transition: opacity 0.2s ease;
}
.brand-anchor:hover {
  opacity: 0.9;
}

.brand-glyph {
  color: var(--accent);
  display: flex;
  align-items: center;
  filter: drop-shadow(0 0 10px var(--accent-glow));
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link-item a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink3);
  transition: color 0.15s ease;
  position: relative;
}
.nav-link-item a:hover {
  color: var(--ink-hi);
}
.nav-link-item a.active {
  color: var(--accent);
  font-weight: 600;
}
.nav-link-item a.active::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 9999px;
  box-shadow: 0 0 8px var(--accent-glow);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn-nav-theme {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--chip);
  color: var(--ink3);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: all 0.15s ease;
}
.btn-nav-theme:hover {
  color: var(--ink-hi);
  border-color: var(--line-strong);
  background: var(--chip-hover);
}

.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: var(--accent);
  color: #042517;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 9999px;
  box-shadow: 0 2px 14px var(--accent-glow);
  transition: all 0.18s ease;
}
.btn-nav-cta:hover {
  background: var(--accent-hi);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--accent-glow);
}

/* ==========================================================================
   页面容器与 Header
   ========================================================================== */
.page-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 60px 24px 100px;
}

.hero-section {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 64px;
}

.pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 9999px;
  background: var(--accent-chip);
  border: 1px solid var(--accent-border);
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 22px;
}
.pill-badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulseDot 2s infinite ease-in-out;
}
@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.hero-title {
  font-size: 2.85rem;
  font-weight: 800;
  color: var(--ink-hi);
  letter-spacing: -0.035em;
  line-height: 1.18;
  margin-bottom: 18px;
}
@media (max-width: 768px) {
  .hero-title {
    font-size: 2.1rem;
  }
}

.hero-desc {
  font-size: 1.12rem;
  color: var(--ink3);
  line-height: 1.68;
  max-width: 640px;
  margin: 0 auto;
}

/* ==========================================================================
   PRICING 页面卡片
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: stretch;
  margin-bottom: 80px;
}
@media (max-width: 992px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 540px;
    margin-left: auto;
    margin-right: auto;
  }
}

.pricing-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: 38px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.pricing-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.08) 0%, var(--card) 45%);
  border: 1.5px solid var(--accent);
  box-shadow: var(--shadow-glow), var(--shadow-md);
  transform: scale(1.03);
  z-index: 2;
}
.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-4px);
  box-shadow: var(--shadow-glow), var(--shadow-lg);
}
@media (max-width: 992px) {
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-3px);
  }
}

.pricing-featured-tag {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #10b981, #059669);
  color: #ffffff;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 4px 14px;
  border-radius: 9999px;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
  white-space: nowrap;
}

.card-tier-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink-hi);
  margin-bottom: 8px;
}
.card-tier-desc {
  font-size: 0.88rem;
  color: var(--ink3);
  min-height: 44px;
  margin-bottom: 24px;
  line-height: 1.5;
}

.price-box {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line-subtle);
}
.price-currency {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--ink-hi);
}
.price-num {
  font-size: 3.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--ink-hi);
}
.price-period {
  font-size: 0.88rem;
  color: var(--ink-faint);
  font-weight: 500;
}
.price-origin {
  font-size: 0.95rem;
  color: var(--ink-faint);
  text-decoration: line-through;
  margin-left: 4px;
}

.btn-tier-cta {
  width: 100%;
  padding: 13px 20px;
  border-radius: var(--radius-md);
  font-size: 0.96rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  border: 1px solid var(--line-strong);
  background: var(--chip);
  color: var(--ink-hi);
  transition: all 0.18s ease;
  margin-bottom: 28px;
  display: block;
}
.btn-tier-cta:hover {
  background: var(--chip-hover);
  border-color: var(--ink3);
}

.pricing-card.featured .btn-tier-cta {
  background: var(--accent);
  color: #042517;
  border: none;
  font-weight: 700;
  box-shadow: 0 4px 16px var(--accent-glow);
}
.pricing-card.featured .btn-tier-cta:hover {
  background: var(--accent-hi);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px var(--accent-glow);
}

.card-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
  flex: 1;
}
.card-features-list li {
  font-size: 0.9rem;
  color: var(--ink2);
  display: flex;
  align-items: flex-start;
  gap: 10px;
  line-height: 1.45;
}
.card-features-list li svg {
  flex-shrink: 0;
  color: var(--accent);
  margin-top: 2px;
}

/* ==========================================================================
   特权对比矩阵 (Feature Matrix)
   ========================================================================== */
.matrix-section {
  max-width: 960px;
  margin: 0 auto 80px;
}
.section-headline {
  text-align: center;
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--ink-hi);
  margin-bottom: 36px;
  letter-spacing: -0.02em;
}

.matrix-table-wrap {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.matrix-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}
.matrix-table th, .matrix-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--line-subtle);
  font-size: 0.9rem;
}
.matrix-table th {
  background: var(--chip);
  font-weight: 600;
  color: var(--ink-hi);
}
.matrix-table tr:last-child td {
  border-bottom: none;
}
.matrix-table td.col-feature {
  color: var(--ink);
  font-weight: 500;
  width: 44%;
}
.matrix-table td.col-free {
  color: var(--ink3);
  width: 28%;
}
.matrix-table td.col-pro {
  color: var(--accent);
  font-weight: 600;
  width: 28%;
}

/* ==========================================================================
   FAQ & 服务承诺
   ========================================================================== */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 960px;
  margin: 0 auto 80px;
}
@media (max-width: 768px) {
  .faq-grid {
    grid-template-columns: 1fr;
  }
}

.faq-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 24px;
}
.faq-q {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink-hi);
  margin-bottom: 10px;
}
.faq-a {
  font-size: 0.9rem;
  color: var(--ink3);
  line-height: 1.6;
}

/* ==========================================================================
   DOWNLOAD 页面平台卡片
   ========================================================================== */
.download-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 1020px;
  margin: 0 auto 80px;
}
@media (max-width: 768px) {
  .download-grid {
    grid-template-columns: 1fr;
  }
}

.platform-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.platform-card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.platform-card.highlight {
  border: 1.5px solid var(--accent);
  box-shadow: var(--shadow-glow), var(--shadow-md);
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.08) 0%, var(--card) 40%);
}

.platform-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}
.platform-icon-wrap {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: var(--chip);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}
.platform-card.highlight .platform-icon-wrap {
  background: var(--accent-chip);
  border-color: var(--accent-border);
}

.platform-title-group h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--ink-hi);
  display: flex;
  align-items: center;
  gap: 8px;
}
.platform-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 9999px;
  background: var(--accent-chip);
  border: 1px solid var(--accent-border);
  color: var(--accent);
}

.platform-desc {
  font-size: 0.92rem;
  color: var(--ink3);
  margin-bottom: 22px;
  line-height: 1.55;
}

.platform-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
  flex: 1;
}
.platform-bullets li {
  font-size: 0.88rem;
  color: var(--ink2);
  display: flex;
  align-items: center;
  gap: 8px;
}
.platform-bullets li svg {
  color: var(--accent);
  flex-shrink: 0;
}

.platform-foot {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn-platform-action {
  width: 100%;
  padding: 13px 20px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.18s ease;
  background: var(--chip);
  border: 1px solid var(--line-strong);
  color: var(--ink-hi);
}
.btn-platform-action:hover {
  background: var(--chip-hover);
  border-color: var(--ink3);
}

.platform-card.highlight .btn-platform-action {
  background: var(--accent);
  color: #042517;
  border: none;
  font-weight: 700;
  box-shadow: 0 4px 16px var(--accent-glow);
}
.platform-card.highlight .btn-platform-action:hover {
  background: var(--accent-hi);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px var(--accent-glow);
}

.platform-meta {
  font-size: 0.78rem;
  color: var(--ink-faint);
  text-align: center;
}

/* ==========================================================================
   全站 Footer
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--line-subtle);
  background: var(--card);
  padding: 40px 24px;
}
.footer-in {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}
.footer-copy {
  font-size: 0.85rem;
  color: var(--ink-faint);
}
.footer-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
}
.footer-links a {
  font-size: 0.85rem;
  color: var(--ink3);
  transition: color 0.15s ease;
}
.footer-links a:hover {
  color: var(--ink-hi);
}