/* ============ Base ============ */
:root {
  --primary: #e63946;
  --primary-dark: #c1121f;
  --dark: #14161f;
  --gray-900: #1f232e;
  --gray-700: #3d4354;
  --gray-500: #6b7280;
  --gray-300: #d1d5db;
  --gray-100: #f3f4f6;
  --white: #ffffff;
  --radius: 14px;
  --shadow: 0 2px 12px rgba(17, 20, 30, .06);
  --shadow-lg: 0 10px 32px rgba(17, 20, 30, .12);
  --transition: all .25s ease;
  --sidebar-w: 240px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif; color: var(--gray-700); background: var(--white); line-height: 1.6; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; }

/* ============ Left Sidebar ============ */
.sidebar { position: fixed; top: 0; left: 0; bottom: 0; width: var(--sidebar-w); background: linear-gradient(180deg, var(--dark) 0%, var(--gray-900) 100%); color: var(--white); display: flex; flex-direction: column; padding: 28px 18px 22px; z-index: 100; }
.side-logo { display: flex; align-items: center; gap: 12px; padding: 0 10px; margin-bottom: 36px; }
.side-logo img { width: 46px; height: 46px; border-radius: 10px; object-fit: cover; }
.side-logo span { font-size: 19px; font-weight: 800; letter-spacing: 1px; color: var(--white); }
.side-nav { flex: 1; }
.side-nav a { display: block; padding: 12px 16px; margin-bottom: 4px; border-radius: 10px; color: var(--gray-300); font-size: 15px; font-weight: 500; transition: var(--transition); }
.side-nav a:hover { background: rgba(255,255,255,.08); color: var(--white); }
.side-nav a.nav-active { background: var(--primary); color: var(--white); font-weight: 700; }
.side-bottom { padding-top: 18px; border-top: 1px solid rgba(255,255,255,.12); }
.side-bottom .btn-block { display: block; text-align: center; margin-bottom: 14px; }
.side-copy { font-size: 12px; color: var(--gray-500); text-align: center; }

/* ============ Main Content ============ */
.main-content { margin-left: var(--sidebar-w); min-height: 100vh; }

/* ============ Hero ============ */
.hero { padding: 96px 48px 64px; background: linear-gradient(180deg, #fdf1f2 0%, var(--white) 100%); text-align: center; }
.hero-eyebrow { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 2px; color: var(--primary); text-transform: uppercase; margin-bottom: 16px; }
.hero h1 { font-size: 44px; font-weight: 800; line-height: 1.2; color: var(--dark); letter-spacing: -1px; margin-bottom: 20px; }
.hero-sub { max-width: 620px; margin: 0 auto 32px; font-size: 17px; color: var(--gray-500); line-height: 1.7; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ============ Buttons ============ */
.btn { display: inline-block; padding: 13px 28px; border-radius: 10px; font-size: 15px; font-weight: 700; transition: var(--transition); cursor: pointer; }
.btn-primary { background: var(--primary); color: var(--white); box-shadow: 0 4px 14px rgba(230, 57, 70, .35); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-outline { border: 2px solid var(--gray-300); color: var(--dark); background: transparent; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

/* ============ Sections ============ */
.section { padding: 64px 48px; }
.section-alt { background: var(--gray-100); }
.section-header { text-align: center; margin-bottom: 40px; }
.section-header h2 { font-size: 30px; font-weight: 800; color: var(--dark); letter-spacing: -.5px; margin-bottom: 12px; }
.section-header p { font-size: 16px; color: var(--gray-500); max-width: 540px; margin: 0 auto; }

/* ============ Cards ============ */
.cards-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; max-width: 1080px; margin: 0 auto; }
.card { background: var(--white); border-radius: var(--radius); padding: 30px 26px; box-shadow: var(--shadow); transition: var(--transition); border: 1px solid transparent; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--gray-300); }
.card-icon { font-size: 30px; margin-bottom: 16px; }
.card h3 { font-size: 17px; font-weight: 700; color: var(--dark); margin-bottom: 10px; }
.card p { font-size: 14px; color: var(--gray-500); line-height: 1.7; }

/* ============ Steps ============ */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; max-width: 900px; margin: 0 auto; }
.step { text-align: center; }
.step-number { display: inline-flex; align-items: center; justify-content: center; width: 54px; height: 54px; border-radius: 50%; background: var(--primary); color: var(--white); font-size: 20px; font-weight: 800; margin-bottom: 18px; }
.step h3 { font-size: 17px; font-weight: 700; color: var(--dark); margin-bottom: 10px; }
.step p { font-size: 14px; color: var(--gray-500); line-height: 1.7; }

/* ============ Testimonials ============ */
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; max-width: 1080px; margin: 0 auto; }
.testimonial { background: var(--white); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); border: 1px solid var(--gray-100); }
.testimonial-quote { font-size: 14px; color: var(--gray-700); line-height: 1.8; margin-bottom: 20px; font-style: italic; }
.testimonial-author strong { display: block; font-size: 14px; color: var(--dark); margin-bottom: 2px; }
.testimonial-author span { font-size: 13px; color: var(--gray-500); }

/* ============ CTA ============ */
.cta-section { text-align: center; background: linear-gradient(135deg, var(--dark) 0%, var(--gray-900) 100%); }
.cta-section h2 { font-size: 30px; font-weight: 800; margin-bottom: 12px; color: var(--white); }
.cta-section p { font-size: 16px; color: var(--gray-300); max-width: 540px; margin: 0 auto 28px; line-height: 1.7; }

/* ============ Footer ============ */
.footer { background: var(--dark); color: var(--gray-300); padding: 40px 48px; }
.footer-inner { max-width: 1080px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: 1px; color: var(--white); }
.footer-brand img { border-radius: 8px; object-fit: cover; }
.footer-links { display: flex; gap: 24px; }
.footer-links a { font-size: 14px; color: var(--gray-300); transition: var(--transition); }
.footer-links a:hover { color: var(--white); }
.footer-copy { font-size: 13px; color: var(--gray-500); width: 100%; text-align: center; margin-top: 8px; }

/* ============ Section switching ============ */
.switch-section { display: none; }
.switch-section.active { display: block; animation: sectionFade .35s ease; }
@keyframes sectionFade { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

/* ============ Legal pages ============ */
.legal-section { padding: 72px 48px 64px; }
.legal-section .section-header { text-align: left; max-width: 800px; margin: 0 auto 32px; }
.legal-content { max-width: 800px; margin: 0 auto; }
.legal-content h2 { font-size: 20px; font-weight: 700; color: var(--dark); margin: 32px 0 12px; }
.legal-content p, .legal-content li { font-size: 15px; color: var(--gray-700); line-height: 1.8; margin-bottom: 10px; }
.legal-content ul { padding-left: 22px; margin-bottom: 12px; }
.legal-content a { color: var(--primary); }

/* ============ Responsive ============ */
@media (max-width: 900px) {
  .sidebar { position: static; width: auto; flex-direction: row; align-items: center; padding: 12px 16px; gap: 12px; flex-wrap: wrap; }
  .side-logo { margin-bottom: 0; }
  .side-nav { display: flex; flex-wrap: wrap; gap: 2px; flex: 1; }
  .side-nav a { padding: 8px 12px; margin-bottom: 0; font-size: 13px; }
  .side-bottom { display: none; }
  .main-content { margin-left: 0; }
  .hero { padding: 48px 20px 40px; }
  .hero h1 { font-size: 30px; }
  .section { padding: 48px 20px; }
  .legal-section { padding: 48px 20px; }
  .footer { padding: 32px 20px; }
  .cards-grid, .testimonials-grid, .steps { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
}

/* BaoY logo wordmark accent */
.logo-accent { color: var(--primary); }