/* ============================================
   0032 - BRUTALIST 粗野主义大胆风
   ============================================ */

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

:root {
  --black: #000000;
  --white: #ffffff;
  --yellow: #facc15;
  --yellow-dark: #eab308;
  --gray-light: #f5f5f5;
  --gray-mid: #e0e0e0;
  --border-thick: 4px;
  --border-xthick: 8px;
}

body {
  font-family: 'Helvetica Neue', 'Arial Black', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--white);
  color: var(--black);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ============ NAVBAR ============ */
.brutal-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: var(--white);
  border-bottom: var(--border-xthick) solid var(--black);
  padding: 0;
}
.brutal-nav .container {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.75rem 2rem; max-width: 1300px; margin: 0 auto;
}
.nav-logo {
  font-size: 1.6rem; font-weight: 900; color: var(--black); text-decoration: none;
  text-transform: uppercase; letter-spacing: -1px;
  background: var(--yellow); padding: 0.25rem 0.75rem;
}
.nav-links { display: flex; gap: 0; list-style: none; align-items: center; }
.nav-links a {
  color: var(--black); text-decoration: none; font-weight: 800; font-size: 0.9rem;
  padding: 0.5rem 1rem; transition: all 0.15s; text-transform: uppercase; letter-spacing: 0.5px;
  border: var(--border-thick) solid transparent;
}
.nav-links a:hover { background: var(--yellow); border-color: var(--black); }

.nav-cta {
  background: var(--yellow); color: var(--black); padding: 0.6rem 1.5rem;
  font-weight: 900; font-size: 0.9rem; text-decoration: none; text-transform: uppercase;
  border: var(--border-thick) solid var(--black); transition: all 0.15s;
}
.nav-cta:hover { background: var(--black); color: var(--yellow); }

/* Hamburger */
.hamburger { display: none; flex-direction: column; gap: 6px; cursor: pointer; background: none; border: var(--border-thick) solid var(--black); padding: 8px; }
.hamburger span { width: 26px; height: 4px; background: var(--black); }

/* ============ HERO ============ */
.hero-section {
  padding: 7rem 0 0; min-height: 90vh; display: flex; position: relative;
}
.hero-left {
  flex: 1; background: var(--black); color: var(--white); padding: 5rem 3rem;
  display: flex; flex-direction: column; justify-content: center;
}
.hero-right {
  flex: 1; background: var(--yellow); padding: 5rem 3rem;
  display: flex; flex-direction: column; justify-content: center;
}
.hero-badge {
  display: inline-block; padding: 0.4rem 1.2rem; border: var(--border-thick) solid var(--white);
  font-weight: 900; font-size: 0.8rem; letter-spacing: 3px; text-transform: uppercase;
  margin-bottom: 1.5rem; width: fit-content;
}
.hero-left .hero-badge { border-color: var(--yellow); color: var(--yellow); }
.hero-right .hero-badge { border-color: var(--black); color: var(--black); }

.hero-left .hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 900; line-height: 1.05;
  text-transform: uppercase; letter-spacing: -2px; margin-bottom: 1.5rem;
}
.hero-left .hero-highlight { background: var(--yellow); color: var(--black); padding: 0 0.5rem; }

.hero-right .hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 900; line-height: 1.1;
  text-transform: uppercase; letter-spacing: -1px; color: var(--black); margin-bottom: 1.5rem;
}
.hero-subtitle {
  font-size: 1.1rem; font-weight: 600; margin-bottom: 2rem; max-width: 500px; line-height: 1.7;
}
.hero-left .hero-subtitle { color: #d1d5db; }
.hero-right .hero-subtitle { color: #1f1f1f; }

.btn-brutal-yellow {
  display: inline-block; padding: 1rem 2.5rem; background: var(--yellow);
  color: var(--black); font-weight: 900; font-size: 1.1rem; text-decoration: none;
  text-transform: uppercase; border: var(--border-thick) solid var(--black);
  letter-spacing: 1px; transition: all 0.15s; width: fit-content;
}
.btn-brutal-yellow:hover { background: var(--black); color: var(--yellow); border-color: var(--yellow); }

.btn-brutal-black {
  display: inline-block; padding: 1rem 2.5rem; background: var(--black);
  color: var(--yellow); font-weight: 900; font-size: 1.1rem; text-decoration: none;
  text-transform: uppercase; border: var(--border-thick) solid var(--black);
  letter-spacing: 1px; transition: all 0.15s; width: fit-content;
}
.btn-brutal-black:hover { background: var(--yellow); color: var(--black); }

/* ============ FEATURES ============ */
.features-section { padding: 6rem 2rem; max-width: 1300px; margin: 0 auto; }
.section-label {
  font-size: 0.85rem; font-weight: 900; text-transform: uppercase; letter-spacing: 4px;
  margin-bottom: 0.5rem; color: #666;
}
.section-title {
  font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 900; text-transform: uppercase;
  letter-spacing: -1px; margin-bottom: 3rem; color: var(--black);
}
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.feature-card {
  border: var(--border-xthick) solid var(--black); padding: 2.5rem 2rem;
  background: var(--white); transition: all 0.15s; position: relative;
}
.feature-card:hover { background: var(--yellow); transform: translate(-4px, -4px); box-shadow: 8px 8px 0 var(--black); }
.feature-icon { font-size: 3rem; margin-bottom: 1.5rem; color: var(--yellow-dark); display: block; }
.feature-card:hover .feature-icon { color: var(--black); }
.feature-card h3 { font-size: 1.3rem; font-weight: 900; text-transform: uppercase; margin-bottom: 1rem; letter-spacing: -0.5px; }
.feature-card p { font-size: 0.9rem; font-weight: 600; color: #444; line-height: 1.7; }

/* ============ STATS ============ */
.stats-section {
  padding: 4rem 2rem; background: var(--black); color: var(--white);
  border-top: var(--border-xthick) solid var(--yellow);
  border-bottom: var(--border-xthick) solid var(--yellow);
}
.stats-section .section-label { color: var(--yellow); }
.stats-section .section-title { color: var(--white); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; max-width: 1300px; margin: 0 auto; }
.stat-item {
  text-align: center; padding: 2rem; border: var(--border-thick) solid var(--yellow);
  transition: all 0.15s;
}
.stat-item:hover { background: var(--yellow); }
.stat-item:hover .stat-number { color: var(--black); }
.stat-item:hover .stat-label { color: var(--black); }
.stat-number { font-size: 3.5rem; font-weight: 900; color: var(--yellow); line-height: 1; }
.stat-label { font-size: 0.95rem; font-weight: 700; color: #d1d5db; margin-top: 0.75rem; text-transform: uppercase; letter-spacing: 1px; }

/* ============ TESTIMONIALS ============ */
.testimonials-section { padding: 6rem 2rem; max-width: 1300px; margin: 0 auto; }
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.testimonial-card {
  border: var(--border-xthick) solid var(--black); padding: 2rem;
  background: var(--white); transition: all 0.15s;
}
.testimonial-card:hover { background: var(--yellow); }
.testimonial-card:nth-child(2) { background: var(--black); color: var(--white); border-color: var(--yellow); }
.testimonial-card:nth-child(2):hover { background: var(--yellow); color: var(--black); }
.testimonial-stars { font-size: 1rem; margin-bottom: 1rem; }
.testimonial-card:nth-child(1) .testimonial-stars { color: var(--yellow-dark); }
.testimonial-card:nth-child(2) .testimonial-stars { color: var(--yellow); }
.testimonial-card:nth-child(3) .testimonial-stars { color: var(--yellow-dark); }
.testimonial-text { font-size: 0.95rem; font-weight: 600; line-height: 1.7; margin-bottom: 1.5rem; }
.testimonial-card:nth-child(2) .testimonial-text { color: #d1d5db; }
.testimonial-author { display: flex; align-items: center; gap: 0.75rem; }
.testimonial-avatar { width: 50px; height: 50px; object-fit: cover; border: var(--border-thick) solid var(--black); }
.testimonial-card:nth-child(2) .testimonial-avatar { border-color: var(--yellow); }
.testimonial-name { font-weight: 900; font-size: 0.95rem; text-transform: uppercase; }
.testimonial-role { font-size: 0.75rem; font-weight: 700; color: #666; text-transform: uppercase; }

/* ============ FAQ ============ */
.faq-section { padding: 6rem 2rem; max-width: 900px; margin: 0 auto; }
.faq-item {
  border: var(--border-thick) solid var(--black); margin-bottom: -4px;
  overflow: hidden; transition: all 0.15s;
}
.faq-item:hover { background: #fafafa; }
.faq-question {
  padding: 1.25rem 1.5rem; cursor: pointer; display: flex;
  justify-content: space-between; align-items: center;
  font-weight: 900; font-size: 1.05rem; text-transform: uppercase;
  letter-spacing: -0.3px; user-select: none;
}
.faq-question i { transition: transform 0.3s; font-size: 1.2rem; }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 1.5rem; font-weight: 600; color: #444; line-height: 1.7; font-size: 0.9rem;
}
.faq-item.open { background: var(--yellow); }
.faq-item.open .faq-answer { max-height: 300px; padding: 0 1.5rem 1.25rem; }
.faq-item.open .faq-question i { transform: rotate(180deg); }

/* ============ CTA ============ */
.cta-section {
  padding: 6rem 2rem; background: var(--black); color: var(--white);
  text-align: center; border-top: var(--border-xthick) solid var(--yellow);
}
.cta-section .section-title { color: var(--white); }
.cta-text { font-size: 1.15rem; font-weight: 600; color: #d1d5db; max-width: 600px; margin: 0 auto 2rem; line-height: 1.7; }
.cta-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ============ FOOTER ============ */
.brutal-footer {
  padding: 3rem 2rem 1.5rem; background: var(--white);
  border-top: var(--border-xthick) solid var(--black);
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; max-width: 1300px; margin: 0 auto; }
.footer-col h4 { font-weight: 900; text-transform: uppercase; margin-bottom: 1rem; font-size: 0.95rem; letter-spacing: 1px; }
.footer-col p, .footer-col a { font-weight: 600; font-size: 0.85rem; line-height: 2; text-decoration: none; color: #444; display: block; }
.footer-col a:hover { color: var(--black); text-decoration: underline; }
.footer-bottom { text-align: center; font-weight: 700; font-size: 0.8rem; color: #666; margin-top: 2rem; padding-top: 1.5rem; border-top: var(--border-thick) solid var(--black); max-width: 1300px; margin-left: auto; margin-right: auto; }

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
  .hero-section { flex-direction: column; min-height: auto; padding-top: 5rem; }
  .hero-left, .hero-right { padding: 3rem 2rem; }
  .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--white); flex-direction: column; border-bottom: var(--border-xthick) solid var(--black); }
  .nav-links.active { display: flex; }
  .nav-links a { border-bottom: var(--border-thick) solid var(--black); padding: 1rem; }
  .hamburger { display: flex; }
  .features-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .hero-left .hero-title { font-size: 2rem; }
  .stats-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .section-title { font-size: 1.6rem; }
}