/* 抖阴传媒官网 - 全局样式 */
:root {
  --bg-primary: #0d0d12;
  --bg-secondary: #16161f;
  --bg-card: #1c1c28;
  --accent: #ff2d55;
  --accent-hover: #ff4d6d;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #6b6b7b;
  --border: #2a2a3a;
  --max-width: 1200px;
  --header-height: 64px;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13, 13, 18, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--header-height);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 20px;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-left: auto;
  flex-shrink: 0;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-primary);
  flex-shrink: 0;
}

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

.logo-img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

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

.nav-main a {
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.95rem;
  transition: all 0.2s;
}

.nav-main a:hover,
.nav-main a.active {
  color: var(--text-primary);
  background: var(--bg-card);
}

.nav-main a.active {
  color: var(--accent);
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff !important;
  padding: 10px 24px;
  border-radius: 24px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: background 0.2s, transform 0.2s;
  border: none;
  cursor: pointer;
}

.btn-download:hover {
  background: var(--accent-hover);
  color: #fff !important;
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
}

/* Main content */
main {
  flex: 1;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 60px 0;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 12px;
  text-align: center;
}

.section-subtitle {
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 40px;
  font-size: 1.05rem;
}

/* Hero */
.hero {
  padding: 80px 0 60px;
  background: linear-gradient(180deg, #1a0a10 0%, var(--bg-primary) 100%);
  text-align: center;
}

.hero-badge {
  display: inline-block;
  background: rgba(255, 45, 85, 0.15);
  color: var(--accent);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  margin-bottom: 20px;
  border: 1px solid rgba(255, 45, 85, 0.3);
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, #ffb3c1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 700px;
  margin: 0 auto 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-card);
  color: var(--text-primary) !important;
  padding: 10px 24px;
  border-radius: 24px;
  font-weight: 600;
  border: 1px solid var(--border);
  transition: all 0.2s;
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent) !important;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
}

.stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--border);
  transition: transform 0.2s, border-color 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 45, 85, 0.4);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Screenshot showcase */
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  align-items: center;
}

.showcase-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.showcase-item img {
  width: 100%;
  aspect-ratio: 9/16;
  object-fit: cover;
  object-position: top;
}

.showcase-caption {
  padding: 16px 20px;
}

.showcase-caption h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.showcase-caption p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Category tags */
.category-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 32px;
}

.category-tag {
  background: var(--bg-card);
  color: var(--text-secondary);
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 0.9rem;
  border: 1px solid var(--border);
  transition: all 0.2s;
}

.category-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.gallery-item {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: transform 0.2s;
}

.gallery-item:hover {
  transform: scale(1.03);
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 9/16;
  object-fit: cover;
  object-position: top;
}

.gallery-label {
  padding: 10px;
  background: var(--bg-card);
  font-size: 0.85rem;
  text-align: center;
  color: var(--text-secondary);
}

/* SEO article */
.seo-article {
  background: var(--bg-secondary);
  border-radius: var(--radius);
  padding: 40px;
  border: 1px solid var(--border);
}

.seo-article h2 {
  font-size: 1.5rem;
  margin: 32px 0 16px;
  color: var(--text-primary);
}

.seo-article h2:first-child {
  margin-top: 0;
}

.seo-article h3 {
  font-size: 1.2rem;
  margin: 24px 0 12px;
  color: var(--accent);
}

.seo-article p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  text-align: justify;
}

.seo-article ul, .seo-article ol {
  color: var(--text-secondary);
  margin: 12px 0 16px 24px;
}

.seo-article li {
  margin-bottom: 8px;
}

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

.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  margin-bottom: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
}

.faq-question {
  padding: 18px 24px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  padding: 0 24px 18px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Page content (legal pages) */
.page-header {
  padding: 60px 0 40px;
  text-align: center;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  font-size: 2rem;
  margin-bottom: 12px;
}

.page-header p {
  color: var(--text-secondary);
}

.page-content {
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}

.page-content h2 {
  font-size: 1.35rem;
  margin: 32px 0 14px;
  color: var(--accent);
}

.page-content h3 {
  font-size: 1.1rem;
  margin: 24px 0 10px;
}

.page-content p, .page-content li {
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.page-content ul, .page-content ol {
  margin: 12px 0 16px 24px;
}

.page-content a {
  text-decoration: underline;
}

/* Breadcrumb */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
  width: 100%;
  box-sizing: border-box;
}

.breadcrumb a {
  color: var(--text-secondary);
}

.breadcrumb span {
  margin: 0 8px;
}

/* 导航栏右侧面包屑 */
.breadcrumb-header {
  display: flex;
  align-items: center;
  padding: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
  width: auto;
}

.breadcrumb-page {
  display: none;
}

/* Footer */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
  margin-top: auto;
}

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

.footer-brand {
  min-width: 0;
}

.footer-brand .logo-link {
  display: inline-flex;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 12px;
  line-height: 1.6;
}

.footer-col {
  min-width: 0;
}

.footer-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

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

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-legal {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-legal a {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Error pages */
.error-page {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
}

.error-code {
  font-size: 6rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-page h1 {
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.error-page p {
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* CTA banner */
.cta-banner {
  background: linear-gradient(135deg, #ff2d55 0%, #c9184a 100%);
  border-radius: var(--radius);
  padding: 48px;
  text-align: center;
  margin: 40px 0;
}

.cta-banner h2 {
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.cta-banner p {
  opacity: 0.9;
  margin-bottom: 24px;
}

.cta-banner .btn-secondary {
  background: #fff;
  color: var(--accent) !important;
  border: none;
}

/* Responsive */
@media (max-width: 992px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px 20px;
    margin-bottom: 28px;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
    flex-shrink: 0;
  }

  .header-inner {
    position: relative;
    gap: 10px;
  }

  .logo-link {
    flex: 1;
    min-width: 0;
  }

  .logo-text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .header-right {
    gap: 0;
    margin-left: auto;
    flex-shrink: 0;
  }

  .breadcrumb-header {
    font-size: 0.75rem;
  }

  .header-right > nav[aria-label="主导航"] {
    position: static;
    width: 0;
    height: 0;
    overflow: visible;
  }

  .nav-main {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    width: 100%;
    background: var(--bg-secondary);
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
    box-sizing: border-box;
    z-index: 999;
    margin: 0;
    list-style: none;
  }

  .nav-main li {
    width: 100%;
    text-align: left;
  }

  .nav-main a {
    display: block;
    width: 100%;
    text-align: left;
    box-sizing: border-box;
  }

  .nav-main.open {
    display: flex;
  }

  .header-download {
    display: none;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero-stats {
    gap: 24px;
  }

  .feature-grid,
  .showcase-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px 16px;
    margin-bottom: 24px;
  }

  .footer-brand {
    grid-column: 1 / -1;
    text-align: center;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
  }

  .footer-brand .logo-link {
    justify-content: center;
  }

  .footer-brand p {
    font-size: 0.85rem;
    margin-top: 10px;
    max-width: 360px;
    margin-left: auto;
    margin-right: auto;
  }

  .footer-title {
    font-size: 0.9rem;
    margin-bottom: 10px;
    color: var(--text-primary);
  }

  .footer-links li {
    margin-bottom: 6px;
  }

  .footer-links a {
    font-size: 0.85rem;
    display: block;
    padding: 5px 0;
    line-height: 1.4;
  }

  .site-footer {
    padding: 32px 0 calc(20px + env(safe-area-inset-bottom, 0px));
  }

  .site-footer .container {
    padding: 0 16px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 14px;
    padding-top: 20px;
  }

  .footer-bottom p {
    font-size: 0.8rem;
    line-height: 1.5;
  }

  .footer-legal {
    justify-content: center;
    gap: 8px;
    width: 100%;
  }

  .footer-legal a {
    font-size: 0.8rem;
    padding: 8px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    white-space: nowrap;
  }

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

  .seo-article {
    padding: 24px;
  }

  .section {
    padding: 40px 0;
  }
}

@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .footer-grid {
    gap: 18px 12px;
  }

  .footer-title {
    font-size: 0.85rem;
  }

  .footer-links a {
    font-size: 0.8rem;
    padding: 4px 0;
  }

  .footer-legal {
    flex-wrap: wrap;
  }

  .footer-legal a {
    flex: 1 1 auto;
    text-align: center;
    min-width: calc(50% - 8px);
  }
}