/* ═══════════════════════════════════════════
   境见 (Context Insight) — Website Styles
   Modern, clean, Apple-inspired
   ═══════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Noto+Sans+SC:wght@300;400;500;600;700;800&display=swap');

:root {
  --accent: #5846DC;
  --accent-light: #7666F0;
  --accent-soft: rgba(88, 70, 220, 0.08);
  --accent-glow: rgba(88, 70, 220, 0.15);
  --bg: #F8F8FA;
  --bg-warm: #FAFAF8;
  --surface: #FFFFFF;
  --ink-dark: #121216;
  --ink-medium: #484850;
  --ink-light: #9E9EA8;
  --ink-faint: #D0D0D8;
  --border: #EAEAEF;
  --border-light: #F0F0F4;
  --radius: 20px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --max-width: 960px;
  --font-en: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-cn: 'Noto Sans SC', 'PingFang SC', -apple-system, sans-serif;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.06), 0 1px 3px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-accent: 0 8px 32px rgba(88, 70, 220, 0.2);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-cn);
  background: var(--bg);
  color: var(--ink-dark);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--accent); text-decoration: none; transition: all 0.2s ease; }
a:hover { color: var(--accent-light); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
}

main { flex: 1; }

/* ══════════════════════════════
   Navigation
   ══════════════════════════════ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 16px 0;
  background: rgba(10, 10, 12, 0.92);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 17px;
  color: #FFFFFF;
}

.nav-brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
}

.nav-brand .brand-sub {
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 500;
  color: rgba(255,255,255,0.45);
  margin-left: -4px;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: rgba(255,255,255,0.6);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: #7666F0;
  border-radius: 1px;
  transition: width 0.25s ease;
}

.nav-links a:hover { color: #A99CF8; opacity: 1; }
.nav-links a:hover::after { width: 100%; }

/* ══════════════════════════════
   Hero Section
   ══════════════════════════════ */
.hero {
  padding: 80px 0 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
  background: #0A0A0C;
}

/* Eclipse-inspired corona glow */
.hero::before {
  content: '';
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(88, 70, 220, 0.15) 0%, rgba(118, 102, 240, 0.06) 30%, transparent 65%);
  pointer-events: none;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(88, 70, 220, 0.15);
  border: 1px solid rgba(88, 70, 220, 0.25);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: #A99CF8;
  margin-bottom: 28px;
}

.hero-badge svg {
  width: 14px;
  height: 14px;
}

.hero-icon {
  width: 100px;
  height: 100px;
  border-radius: 24px;
  margin: 0 auto 32px;
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0,0,0,0.4), 0 0 60px rgba(88, 70, 220, 0.2);
  position: relative;
}

.hero-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero h1 {
  font-size: 52px;
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 4px;
  color: #FFFFFF;
  position: relative;
}

.hero .subtitle {
  font-family: var(--font-en);
  font-size: 15px;
  font-weight: 500;
  color: rgba(255,255,255,0.35);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero .description {
  font-size: 18px;
  color: rgba(255,255,255,0.6);
  max-width: 520px;
  margin: 0 auto 40px;
  line-height: 1.8;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, #5846DC, #7666F0);
  color: white;
  padding: 15px 32px;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.2px;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 8px 32px rgba(88, 70, 220, 0.3);
}

.btn-primary:hover {
  color: white;
  opacity: 1;
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(88, 70, 220, 0.4);
}

.btn-primary svg { width: 20px; height: 20px; fill: currentColor; }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.8);
  padding: 15px 28px;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid rgba(255,255,255,0.12);
  transition: all 0.2s;
}

.btn-secondary:hover {
  color: #A99CF8;
  border-color: rgba(88, 70, 220, 0.3);
  background: rgba(88, 70, 220, 0.1);
  opacity: 1;
}

/* ══════════════════════════════
   Features Section
   ══════════════════════════════ */
.features {
  padding: 48px 0 80px;
}

.section-label {
  text-align: center;
  margin-bottom: 48px;
}

.section-label .tag {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-label h2 {
  font-size: 30px;
  font-weight: 800;
  color: var(--ink-dark);
  letter-spacing: -0.3px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  border-color: rgba(88, 70, 220, 0.15);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 22px;
}

.feature-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--ink-dark);
}

.feature-card p {
  font-size: 14px;
  color: var(--ink-medium);
  line-height: 1.7;
}

/* ══════════════════════════════
   How It Works
   ══════════════════════════════ */
.how-it-works {
  padding: 64px 0 80px;
  background: var(--surface);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-top: 48px;
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: white;
  font-family: var(--font-en);
  font-size: 22px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 4px 16px rgba(88, 70, 220, 0.2);
}

.step h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--ink-dark);
}

.step p {
  font-size: 14px;
  color: var(--ink-medium);
  line-height: 1.7;
  max-width: 240px;
  margin: 0 auto;
}

/* Step connectors */
.step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 28px;
  right: -20px;
  width: 40px;
  height: 2px;
  background: var(--ink-faint);
}

/* ══════════════════════════════
   Pricing Section
   ══════════════════════════════ */
.pricing {
  padding: 64px 0 80px;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  align-items: start;
}

.pricing-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px 32px;
  position: relative;
  transition: all 0.3s ease;
}

.pricing-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.pricing-card-featured {
  border: 2px solid var(--accent);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(88, 70, 220, 0.08);
  padding-top: 44px;
}

.pricing-card-featured:hover {
  box-shadow: var(--shadow-lg), var(--shadow-accent);
}

.pricing-popular {
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: white;
  font-size: 12px;
  font-weight: 700;
  padding: 5px 20px;
  border-radius: 0 0 10px 10px;
  letter-spacing: 1px;
}

.pricing-save {
  position: absolute;
  top: 16px;
  right: 16px;
  background: #E8F5E9;
  color: #2E7D32;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
}

.pricing-header {
  text-align: center;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

.pricing-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-light);
  letter-spacing: 0.5px;
}

.pricing-amount {
  margin: 12px 0 8px;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
}

.pricing-amount .price {
  font-family: var(--font-en);
  font-size: 44px;
  font-weight: 800;
  color: var(--ink-dark);
  letter-spacing: -1px;
  line-height: 1;
}

.pricing-amount .period {
  font-size: 16px;
  font-weight: 500;
  color: var(--ink-light);
}

.pricing-desc {
  font-size: 13px;
  color: var(--ink-light);
  margin: 0;
}

.pricing-features {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--ink-medium);
  line-height: 1.4;
}

.pricing-features li svg {
  flex-shrink: 0;
  color: #4CAF50;
}

.pricing-features li strong {
  color: var(--ink-dark);
}

.pricing-btn {
  display: block;
  width: 100%;
  text-align: center;
  padding: 14px 24px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.2s ease;
}

.pricing-btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: white;
  box-shadow: var(--shadow-accent);
}

.pricing-btn-primary:hover {
  color: white;
  opacity: 1;
  transform: translateY(-1px);
  box-shadow: 0 8px 28px rgba(88, 70, 220, 0.3);
}

.pricing-btn-outline {
  background: transparent;
  color: var(--ink-dark);
  border: 1.5px solid var(--border);
}

.pricing-btn-outline:hover {
  color: var(--accent);
  border-color: var(--accent);
  opacity: 1;
  background: var(--accent-soft);
}

.pricing-note {
  text-align: center;
  font-size: 13px;
  color: var(--ink-light);
  margin-top: 28px;
}

/* ══════════════════════════════
   CTA Section
   ══════════════════════════════ */
.cta {
  padding: 80px 0;
  text-align: center;
}

.cta-card {
  background: linear-gradient(135deg, #1a1a2e 0%, #16162a 100%);
  border-radius: 24px;
  padding: 64px 48px;
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(88, 70, 220, 0.25) 0%, transparent 60%);
  pointer-events: none;
}

.cta-card h2 {
  font-size: 30px;
  font-weight: 800;
  color: white;
  margin-bottom: 12px;
  position: relative;
}

.cta-card p {
  font-size: 16px;
  color: rgba(255,255,255,0.65);
  margin-bottom: 32px;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
}

.cta-card .btn-primary {
  position: relative;
  background: white;
  color: var(--accent);
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

.cta-card .btn-primary:hover {
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}

/* ══════════════════════════════
   Page Content (Privacy, Terms, Support)
   ══════════════════════════════ */
.page-header {
  padding: 64px 0 36px;
  text-align: center;
  position: relative;
}

.page-header::before {
  content: '';
  position: absolute;
  top: -80px;
  left: 50%;
  transform: translateX(-50%);
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0.3;
}

.page-header h1 {
  font-size: 36px;
  font-weight: 800;
  color: var(--ink-dark);
  margin-bottom: 8px;
  position: relative;
}

.page-header .date {
  font-size: 13px;
  color: var(--ink-light);
  font-family: var(--font-en);
  position: relative;
}

.page-content {
  padding: 0 0 80px;
}

.content-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 48px 44px;
  box-shadow: var(--shadow-sm);
}

.content-card h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink-dark);
  margin: 36px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-light);
}

.content-card h2:first-child { margin-top: 0; }

.content-card p {
  font-size: 15px;
  color: var(--ink-medium);
  margin-bottom: 14px;
  line-height: 1.8;
}

.content-card ul, .content-card ol {
  padding-left: 22px;
  margin-bottom: 14px;
  list-style: disc;
}

.content-card li {
  font-size: 15px;
  color: var(--ink-medium);
  margin-bottom: 8px;
  line-height: 1.7;
}

.content-card strong { color: var(--ink-dark); }
.content-card a { font-weight: 500; }

/* ══════════════════════════════
   Support Page
   ══════════════════════════════ */
.contact-card {
  background: linear-gradient(135deg, var(--accent-soft), rgba(118, 102, 240, 0.06));
  border: 1px solid rgba(88, 70, 220, 0.12);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 160px;
  height: 160px;
  background: radial-gradient(circle, rgba(88, 70, 220, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.contact-card h2 {
  margin: 0 0 12px;
  font-size: 22px;
  color: var(--ink-dark);
  position: relative;
}

.contact-card .email {
  font-family: var(--font-en);
  font-size: 20px;
  font-weight: 600;
  color: var(--accent);
  position: relative;
}

.contact-card .response-time {
  font-size: 14px;
  color: var(--ink-light);
  margin-top: 10px;
  position: relative;
}

.faq-item {
  border-bottom: 1px solid var(--border-light);
  padding: 24px 0;
}
.faq-item:last-child { border-bottom: none; }

.faq-item h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-dark);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.faq-item h3::before {
  content: 'Q';
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 700;
  color: white;
  background: var(--accent);
  width: 22px;
  height: 22px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.faq-item p {
  font-size: 14px;
  color: var(--ink-medium);
  margin: 0;
  padding-left: 30px;
  line-height: 1.75;
}

/* ══════════════════════════════
   Footer
   ══════════════════════════════ */
.footer {
  padding: 28px 0;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-copy {
  font-size: 13px;
  color: var(--ink-light);
  font-family: var(--font-en);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 13px;
  color: var(--ink-light);
}
.footer-links a:hover { color: var(--accent); }

/* ══════════════════════════════
   Responsive
   ══════════════════════════════ */
@media (max-width: 768px) {
  .features-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
  .steps { grid-template-columns: 1fr; gap: 32px; }
  .step:not(:last-child)::after { display: none; }
  .hero h1 { font-size: 36px; }
  .hero { padding: 56px 0 36px; }
  .cta-card { padding: 48px 28px; }
}

@media (max-width: 600px) {
  .nav-links { display: none; }
  .hero h1 { font-size: 32px; }
  .hero .description { font-size: 16px; }
  .section-label h2 { font-size: 24px; }
  .content-card { padding: 32px 24px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .footer .container {
    flex-direction: column;
    gap: 14px;
    text-align: center;
  }
}