/* ==================================
   Deepsea - Layout Styles
   布局样式
   ================================== */

/* ========== Header & Navigation ========== */
.header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: rgba(4, 11, 22, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.header.scrolled {
  background: rgba(4, 11, 22, 0.98);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  gap: var(--space-xl);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  text-decoration: none;
  transition: all var(--transition-base);
}

.logo:hover {
  color: var(--color-primary);
}

.logo-icon {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  flex: 1;
}

.nav-close {
  display: none;
  background: rgba(4, 11, 22, 0.8);
  border: 1px solid rgba(169, 188, 214, 0.2);
  color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  padding: 0.4rem;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
}

.nav-close:hover {
  color: var(--color-text-primary);
  border-color: rgba(169, 188, 214, 0.4);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
  margin: 0;
  padding: 0;
}

.nav-link {
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  position: relative;
}

.nav-link:hover {
  color: var(--color-primary);
  background: rgba(26, 167, 214, 0.1);
}

.nav-link.active {
  color: var(--color-primary);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -1rem;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  background: var(--color-primary);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--color-primary);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  gap: var(--space-xs);
  padding: 0.375rem;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-lg);
}

.lang-btn {
  padding: 0.375rem 0.75rem;
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
}

.lang-btn:hover {
  color: var(--color-text-secondary);
}

.lang-btn.active {
  background: var(--color-primary);
  color: var(--color-text-primary);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* Wallet Button */
.wallet-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.625rem 1.25rem;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-base);
}

.wallet-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.wallet-btn.connected {
  background: rgba(26, 167, 214, 0.1);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.wallet-icon {
  width: 1.25rem;
  height: 1.25rem;
}

.wallet-address {
  font-family: var(--font-mono);
  font-size: var(--font-size-small);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 0.375rem;
  padding: 0.5rem;
  background: none;
  border: none;
  cursor: pointer;
}

.menu-toggle-line {
  width: 1.5rem;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.menu-toggle.active .menu-toggle-line:nth-child(1) {
  transform: rotate(45deg) translateY(0.5rem);
}

.menu-toggle.active .menu-toggle-line:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active .menu-toggle-line:nth-child(3) {
  transform: rotate(-45deg) translateY(-0.5rem);
}

/* Demo Mode Badge */
.demo-badge {
  position: fixed;
  top: 4.5rem;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background: rgba(255, 158, 77, 0.15);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 158, 77, 0.3);
  padding: var(--space-sm) 0;
  text-align: center;
  font-size: var(--font-size-small);
  color: var(--color-accent);
}

.demo-badge-icon {
  display: inline-block;
  margin-right: var(--space-xs);
}

/* ========== Main Content ========== */
.main {
  position: relative;
  z-index: 2;
  min-height: calc(100vh - 200px);
}

/* Hero Section */
.hero {
  position: relative;
  padding: 8rem 0;
  overflow: hidden;
  min-height: 100vh;
  max-width: 100vw;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Video Background */
.hero-video {
  position: absolute;
  top: 50%;
  left: 50%;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  transform: translate(-50%, -50%);
  z-index: 0;
  object-fit: cover;
}

/* Dark Overlay for Text Readability */
.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    180deg,
    rgba(4, 11, 22, 0.7) 0%,
    rgba(4, 11, 22, 0.8) 50%,
    rgba(4, 11, 22, 0.9) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  animation: fadeInUp 0.8s ease-out;
  padding: var(--space-3xl) var(--space-xl);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-title {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-lg);
  color: #ffffff;
  text-shadow: 0 4px 16px rgba(26, 167, 214, 0.4), 0 0 20px rgba(50, 252, 224, 0.2);
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff 0%, #e0f2fe 100%);
  -webkit-background-clip: text;
  background-clip: text;
  animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% {
    text-shadow: 0 4px 16px rgba(26, 167, 214, 0.4), 0 0 20px rgba(50, 252, 224, 0.2);
  }
  50% {
    text-shadow: 0 4px 16px rgba(26, 167, 214, 0.6), 0 0 30px rgba(50, 252, 224, 0.4);
  }
}

.hero-subtitle {
  font-size: var(--font-size-h5);
  color: #e0f2fe;
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-2xl);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4), 0 0 12px rgba(50, 252, 224, 0.2);
  letter-spacing: 0.5px;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  justify-content: center;
  animation: slideInUp 0.8s ease-out 0.2s both;
  padding: var(--space-lg) 0;
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-actions .btn {
  font-size: var(--font-size-body);
  padding: 0.875rem 2rem;
  border-radius: var(--radius-lg);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.hero-actions .btn:hover {
  transform: translateY(-3px);
}

/* Section */
.section {
  padding: var(--space-4xl) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-title {
  font-size: var(--font-size-h2);
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: var(--font-size-h5);
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* Metrics Ticker */
.metrics-ticker {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-3xl);
}

/* Value Propositions */
.value-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.value-card {
  text-align: center;
  padding: var(--space-2xl);
}

.value-icon {
  width: 4rem;
  height: 4rem;
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(26, 167, 214, 0.2), rgba(50, 252, 224, 0.1));
  border-radius: var(--radius-xl);
  color: var(--color-secondary);
}

.value-title {
  font-size: var(--font-size-h4);
  margin-bottom: var(--space-sm);
}

.value-description {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* Featured Markets */
.featured-markets {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--space-xl);
}

/* Insights Preview */
.insights-scroll {
  display: flex;
  gap: var(--space-lg);
  overflow-x: auto;
  padding-bottom: var(--space-lg);
  -webkit-overflow-scrolling: touch;
  scroll-snap-type: x mandatory;
}

.insights-scroll::-webkit-scrollbar {
  height: 8px;
}

.insights-scroll::-webkit-scrollbar-track {
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
}

.insights-scroll::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-sm);
}

.insights-scroll::-webkit-scrollbar-thumb:hover {
  background: var(--color-border-hover);
}

.insight-card-scroll {
  flex: 0 0 350px;
  scroll-snap-align: start;
}

/* ========== Footer ========== */
.footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: var(--space-4xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand {
  max-width: 400px;
}

.footer-logo {
  margin-bottom: var(--space-lg);
}

.footer-description {
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-lg);
}

.footer-social {
  display: flex;
  gap: var(--space-md);
}

.social-link {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: all var(--transition-base);
}

.social-link:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-primary);
  transform: translateY(-2px);
}

.footer-section {
  display: flex;
  flex-direction: column;
}

.footer-title {
  font-size: var(--font-size-h5);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-lg);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-link {
  display: block;
  padding: var(--space-sm) 0;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-base);
}

.footer-link:hover {
  color: var(--color-primary);
  padding-left: var(--space-sm);
}

.footer-bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-copyright {
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
}

.footer-legal {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-legal-link {
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
  text-decoration: none;
  transition: color var(--transition-base);
}

.footer-legal-link:hover {
  color: var(--color-primary);
}

/* Newsletter */
.newsletter-form {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.newsletter-input {
  flex: 1;
}

/* ========== FAQ Accordion ========== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-md);
  overflow: hidden;
  transition: all var(--transition-base);
}

.faq-item:hover {
  border-color: var(--color-border-hover);
}

.faq-question {
  width: 100%;
  padding: var(--space-lg);
  background: var(--color-bg-card);
  border: none;
  text-align: left;
  font-size: var(--font-size-h5);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-base);
}

.faq-question:hover {
  background: var(--color-bg-secondary);
}

.faq-icon {
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  transition: transform var(--transition-base);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-content {
  padding: var(--space-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ========== Breadcrumbs ========== */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
  font-size: var(--font-size-small);
  color: var(--color-text-muted);
}

.breadcrumb-link {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-base);
}

.breadcrumb-link:hover {
  color: var(--color-primary);
}

.breadcrumb-separator {
  color: var(--color-text-muted);
  margin: 0 var(--space-xs);
}

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

/* ========== Filters & Sorting ========== */
.filters-bar {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.filters-row {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
  align-items: center;
}

.filter-group {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.filter-label {
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  white-space: nowrap;
}

.filter-chips {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.filter-chip {
  padding: 0.5rem 1rem;
  font-size: var(--font-size-small);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
}

.filter-chip:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.filter-chip.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-primary);
  box-shadow: 0 0 12px rgba(26, 167, 214, 0.4);
}

/* View Toggle */
.view-toggle {
  display: flex;
  gap: var(--space-xs);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  padding: 0.25rem;
}

.view-btn {
  padding: 0.5rem;
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

.view-btn:hover {
  color: var(--color-text-secondary);
}

.view-btn.active {
  background: var(--color-bg-secondary);
  color: var(--color-primary);
}

/* ========== Responsive Layout ========== */
@media (max-width: 992px) {
  .hero {
    min-height: 80vh;
    padding: 6rem 0;
  }

  .hero-video {
    /* 移动端视频优化 */
    object-fit: cover;
  }

  .hero-overlay {
    /* 移动端增强遮罩 */
    background: linear-gradient(
      180deg,
      rgba(4, 11, 22, 0.75) 0%,
      rgba(4, 11, 22, 0.85) 50%,
      rgba(4, 11, 22, 0.92) 100%
    );
  }

  .hero-actions {
    justify-content: center;
  }

  .nav {
    display: none;
  }

  .nav.mobile-open {
    display: flex;
    position: fixed;
    inset: 0;
    height: 100vh;
    background: linear-gradient(180deg, rgba(4, 11, 22, 0.96) 0%, rgba(2, 26, 45, 0.98) 100%);
    backdrop-filter: blur(24px);
    flex-direction: column;
    padding: calc(4rem + var(--space-lg)) var(--space-2xl) var(--space-2xl);
    overflow-y: auto;
    z-index: var(--z-modal);
  }

  .nav.mobile-open .nav-close {
    display: inline-flex;
    align-self: flex-end;
    margin-bottom: var(--space-lg);
  }

  .nav-menu {
    flex-direction: column;
    width: 100%;
    gap: var(--space-md);
  }

  .nav-link {
    padding: var(--space-md) 0;
    width: 100%;
    border-bottom: 1px solid rgba(169, 188, 214, 0.12);
    font-size: var(--font-size-h5);
    text-align: center;
  }

  .nav-link.active::after {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: var(--space-lg);
  }

  .footer-legal {
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-md);
  }

  .footer-content {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .featured-markets {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .section {
    padding: var(--space-2xl) 0;
  }

  .hero {
    padding: var(--space-2xl) 0;
    max-width: 100vw;
    overflow-x: hidden;
    min-height: 70vh;
  }

  .hero-video {
    /* 小屏幕确保视频覆盖 */
    min-width: 100%;
    min-height: 100%;
  }

  .hero-content {
    padding: var(--space-2xl) var(--space-md);
  }

  .hero-title {
    font-size: var(--font-size-h2);
  }

  .hero-subtitle {
    font-size: var(--font-size-h6);
  }

  .section-header {
    margin-bottom: var(--space-xl);
  }

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

  .metrics-ticker {
    grid-template-columns: repeat(2, 1fr);
  }

  .filters-row {
    flex-direction: column;
    align-items: stretch;
  }

  .filter-group {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }
}

@media (max-width: 576px) {
  .metrics-ticker {
    grid-template-columns: 1fr;
  }

  /* 🔑 移动端头部激进优化 - 防止溢出 */
  .header-content {
    padding: 0.5rem 0.75rem;
    gap: 0.5rem;
    max-width: 100vw;
    overflow-x: hidden;
  }

  .logo {
    font-size: 1rem;
    gap: 0.375rem;
  }

  .logo-icon {
    width: 1.5rem;
    height: 1.5rem;
  }

  .header-actions {
    gap: 0.375rem;
    flex-shrink: 0;
  }

  /* 🔑 语言切换按钮压缩 */
  .lang-switcher {
    padding: 0.25rem;
    gap: 0.25rem;
  }

  .lang-btn {
    font-size: 0.625rem;
    padding: 0.25rem 0.5rem;
    white-space: nowrap;
    min-width: unset;
  }

  /* 🔑 连接钱包按钮压缩 */
  .wallet-btn {
    padding: 0.375rem 0.625rem;
    font-size: 0.75rem;
    white-space: nowrap;
    gap: 0.25rem;
    flex-shrink: 0;
  }

  .wallet-icon {
    width: 1rem;
    height: 1rem;
  }

  .wallet-btn span:not(.wallet-address) {
    display: inline;
  }

  .wallet-address {
    display: none;
  }

  /* 🔑 严格防止页面溢出 */
  body {
    overflow-x: hidden;
    max-width: 100vw;
  }

  .container {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
    max-width: 100vw;
  }

  .insights-scroll {
    padding: 0 var(--space-md);
  }

  .insight-card-scroll {
    flex: 0 0 280px;
  }
}