/* 重置与全局变量 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #1a1a2e;
  --secondary: #16213e;
  --accent: #e94560;
  --light: #f8f9fa;
  --text: #2d3436;
  --glass: rgba(255, 255, 255, 0.08);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  --radius: 20px;
  --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

[data-theme="dark"] {
  --primary: #0f0f1a;
  --secondary: #1a1a2e;
  --light: #1e1e2f;
  --text: #e0e0e0;
  --glass: rgba(255, 255, 255, 0.05);
}

/* 基础布局 */
html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  background: var(--primary);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background 0.3s, color 0.3s;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 通用卡片 */
.glass-card {
  background: var(--glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px;
  transition: var(--transition);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

/* 按钮 */
.btn {
  display: inline-block;
  padding: 14px 36px;
  border-radius: 50px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-accent {
  background: linear-gradient(135deg, #e94560, #c23152);
  color: #fff;
  box-shadow: 0 4px 20px rgba(233, 69, 96, 0.4);
}

.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(233, 69, 96, 0.5);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--accent);
  color: var(--accent);
}

.btn-outline:hover {
  background: var(--accent);
  color: #fff;
}

/* 标题 */
.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #e94560, #ff6b6b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 48px;
  max-width: 640px;
}

/* 网格 */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

/* 动画 */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 辅助 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ========== Header & Nav ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
  background: transparent;
}

.site-header.scrolled {
  background: rgba(26, 26, 46, 0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #fff;
  font-weight: 800;
  font-size: 1.5rem;
}

.logo svg {
  width: 40px;
  height: 40px;
}

.nav-menu {
  display: flex;
  gap: 8px;
  list-style: none;
}

.nav-menu a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  padding: 8px 18px;
  border-radius: 30px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  background: rgba(233, 69, 96, 0.2);
  color: #e94560;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.hamburger span {
  width: 28px;
  height: 3px;
  background: #fff;
  border-radius: 4px;
  transition: var(--transition);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 15, 26, 0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s;
}

.mobile-nav.open {
  opacity: 1;
  pointer-events: all;
}

.mobile-nav a {
  color: #fff;
  font-size: 1.4rem;
  font-weight: 600;
  text-decoration: none;
  padding: 12px 24px;
  border-radius: 12px;
  transition: var(--transition);
}

.mobile-nav a:hover {
  background: rgba(233, 69, 96, 0.2);
  color: #e94560;
}

.mobile-close {
  position: absolute;
  top: 24px;
  right: 24px;
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
}

/* ========== Banner / Hero ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(233, 69, 96, 0.15), transparent 60%),
              radial-gradient(ellipse at 70% 30%, rgba(22, 33, 62, 0.3), transparent 50%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-text h1 {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 24px;
  color: #fff;
}

.hero-text h1 span {
  background: linear-gradient(135deg, #e94560, #ff6b6b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-text p {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-card {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 4 / 3;
  background: var(--glass);
  backdrop-filter: blur(16px);
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.hero-card-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.hero-card-badge {
  background: var(--accent);
  color: #fff;
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.hero-card-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.hero-stat {
  background: rgba(255, 255, 255, 0.05);
  padding: 12px 16px;
  border-radius: 12px;
  text-align: center;
}

.hero-stat-value {
  font-size: 1.8rem;
  font-weight: 800;
  color: #e94560;
}

.hero-stat-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.6);
}

.hero-slider-dots {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-top: 16px;
}

.hero-slider-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition: var(--transition);
}

.hero-slider-dots span.active {
  background: #e94560;
  width: 30px;
  border-radius: 6px;
}

/* ========== Sections ========== */
section {
  padding: 100px 0;
}

.section-dark {
  background: var(--secondary);
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 20px;
  font-size: 1.05rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 32px;
}

.about-stat {
  text-align: center;
  padding: 20px;
  background: var(--glass);
  border-radius: 16px;
  backdrop-filter: blur(10px);
}

.about-stat .num {
  font-size: 2.4rem;
  font-weight: 800;
  color: #e94560;
}

.about-stat .label {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 16px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
  padding: 20px 24px;
  background: var(--glass);
  border-radius: 16px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 28px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--primary);
}

.timeline-year {
  font-size: 1.2rem;
  font-weight: 700;
  color: #e94560;
  margin-bottom: 8px;
}

/* Team */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 28px;
}

.team-card {
  text-align: center;
  padding: 32px 20px;
  background: var(--glass);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition);
}

.team-card:hover {
  transform: translateY(-6px);
}

.team-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin: 0 auto 16px;
  background: linear-gradient(135deg, var(--accent), #ff6b6b);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  color: #fff;
  font-weight: 700;
}

.team-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.team-role {
  color: var(--accent);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.team-desc {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

/* Product */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}

.product-card {
  padding: 32px 24px;
  background: var(--glass);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition);
  text-align: center;
}

.product-card:hover {
  transform: translateY(-6px);
}

.product-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, rgba(233, 69, 96, 0.2), rgba(255, 107, 107, 0.1));
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-card h3 {
  font-size: 1.3rem;
  color: #fff;
  margin-bottom: 12px;
}

.product-card p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Partner */
.partner-scroll {
  display: flex;
  gap: 32px;
  overflow-x: auto;
  padding: 20px 0;
  scrollbar-width: none;
  mask-image: linear-gradient(to right, transparent, black 5%, black 95%, transparent);
}

.partner-scroll::-webkit-scrollbar {
  display: none;
}

.partner-item {
  flex-shrink: 0;
  width: 120px;
  height: 60px;
  background: var(--glass);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  backdrop-filter: blur(8px);
}

/* Testimonial */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}

.testimonial-card {
  padding: 28px;
  background: var(--glass);
  border-radius: var(--radius);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.05);
  position: relative;
}

.testimonial-card::before {
  content: '\201C';
  font-size: 4rem;
  position: absolute;
  top: 8px;
  right: 24px;
  color: rgba(233, 69, 96, 0.2);
  font-family: Georgia, serif;
}

.testimonial-text {
  color: rgba(255, 255, 255, 0.8);
  font-style: italic;
  margin-bottom: 16px;
  line-height: 1.7;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #ff6b6b);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.2rem;
}

.testimonial-name {
  font-weight: 600;
  color: #fff;
}

.testimonial-role {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
}

/* News */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

.news-card {
  background: var(--glass);
  border-radius: var(--radius);
  overflow: hidden;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition);
}

.news-card:hover {
  transform: translateY(-4px);
}

.news-image {
  height: 180px;
  background: linear-gradient(135deg, rgba(233, 69, 96, 0.3), rgba(22, 33, 62, 0.5));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}

.news-content {
  padding: 24px;
}

.news-date {
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 8px;
}

.news-card h3 {
  font-size: 1.2rem;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.4;
}

.news-card p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.read-more {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.read-more:hover {
  gap: 12px;
}

/* FAQ */
.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.faq-item {
  background: var(--glass);
  border-radius: 16px;
  overflow: hidden;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 600;
  color: #fff;
  font-size: 1.05rem;
  transition: var(--transition);
}

.faq-question:hover {
  background: rgba(255, 255, 255, 0.03);
}

.faq-question .icon {
  font-size: 1.4rem;
  transition: var(--transition);
  color: var(--accent);
}

.faq-item.open .faq-question .icon {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease, padding 0.3s;
  color: rgba(255, 255, 255, 0.75);
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  max-height: 600px;
  padding: 0 24px 24px;
}

/* HowTo */
.howto-steps {
  counter-reset: step;
  display: grid;
  gap: 24px;
}

.howto-step {
  background: var(--glass);
  border-radius: 16px;
  padding: 24px 28px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.05);
  position: relative;
  padding-left: 80px;
}

.howto-step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 24px;
  top: 24px;
  width: 40px;
  height: 40px;
  background: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 1.2rem;
}

.howto-step h4 {
  color: #fff;
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.howto-step p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 20px;
  background: var(--glass);
  border-radius: 16px;
  backdrop-filter: blur(10px);
}

.contact-icon {
  width: 44px;
  height: 44px;
  background: rgba(233, 69, 96, 0.2);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-item h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 4px;
}

.contact-item p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
}

.map-placeholder {
  width: 100%;
  height: 320px;
  background: var(--glass);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  color: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Footer */
.footer {
  background: var(--secondary);
  padding: 60px 0 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.95rem;
  margin-top: 16px;
  max-width: 320px;
}

.footer h4 {
  color: #fff;
  font-size: 1.1rem;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  font-size: 0.95rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  margin: 0 8px;
  transition: var(--transition);
}

.footer-bottom a:hover {
  color: var(--accent);
}

/* Back to top */
.back-to-top {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(233, 69, 96, 0.4);
  transition: var(--transition);
  opacity: 0;
  pointer-events: none;
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: all;
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(233, 69, 96, 0.5);
}

/* Theme toggle */
.theme-toggle {
  position: fixed;
  bottom: 40px;
  left: 40px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--glass);
  backdrop-filter: blur(16px);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 1.4rem;
  cursor: pointer;
  transition: var(--transition);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  background: rgba(233, 69, 96, 0.2);
}

/* Search modal */
.search-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(12px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
}

.search-modal.open {
  display: flex;
}

.search-modal-content {
  width: 90%;
  max-width: 560px;
  background: var(--secondary);
  border-radius: 24px;
  padding: 32px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.search-modal input {
  width: 100%;
  padding: 16px 20px;
  border-radius: 12px;
  border: 2px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  font-size: 1.1rem;
  outline: none;
  transition: var(--transition);
}

.search-modal input:focus {
  border-color: var(--accent);
}

.search-modal .close-search {
  position: absolute;
  top: 24px;
  right: 24px;
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 16px 0;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--accent);
}

.breadcrumb .current {
  color: var(--accent);
}

/* Related articles */
.related-articles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.related-article {
  background: var(--glass);
  border-radius: 12px;
  padding: 16px;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.related-article h4 {
  font-size: 0.95rem;
  color: #fff;
  margin-bottom: 6px;
}

.related-article .date {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.4);
}

/* Article full */
.article-full {
  display: none;
  margin-top: 24px;
  padding: 24px;
  background: var(--glass);
  border-radius: 16px;
  backdrop-filter: blur(10px);
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
}

.article-full.open {
  display: block;
}

.article-full h3 {
  color: #fff;
  margin-bottom: 16px;
  font-size: 1.4rem;
}

.article-full p {
  margin-bottom: 12px;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-text h1 {
    font-size: 2.8rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

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

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

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .hero-text h1 {
    font-size: 2.2rem;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero-buttons {
    flex-direction: column;
  }

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

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }

  .theme-toggle {
    bottom: 20px;
    left: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }

  .timeline {
    padding-left: 24px;
  }

  .timeline-item::before {
    left: -18px;
  }

  .howto-step {
    padding-left: 60px;
  }

  .howto-step::before {
    left: 12px;
    width: 34px;
    height: 34px;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .hero-text h1 {
    font-size: 1.8rem;
  }

  .container {
    padding: 0 16px;
  }

  section {
    padding: 60px 0;
  }
}