/* 抖阴视频官网 - dys.lat 全局样式 */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #141414;
  --bg-card: #1a1a1a;
  --text-primary: #ffffff;
  --text-secondary: #b3b3b3;
  --text-muted: #666666;
  --accent-red: #ff0040;
  --accent-pink: #ff2d55;
  --accent-cyan: #00f0ff;
  --accent-magenta: #ff00aa;
  --border-color: #2a2a2a;
  --max-width: 1200px;
  --header-height: 64px;
  --radius: 8px;
  --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;
}

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

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

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 10, 10, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
}

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

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-link img {
  width: 40px;
  height: 40px;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.main-nav {
  display: flex;
  gap: 28px;
  list-style: none;
}

.main-nav a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 5px 0;
  transition: 0.3s;
}

/* Hero */
.hero {
  padding: 60px 0 40px;
  background: linear-gradient(180deg, #121212 0%, var(--bg-primary) 100%);
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: 16px;
  line-height: 1.3;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-red), var(--accent-pink));
  color: #fff;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 0, 64, 0.4);
  color: #fff;
}

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

.btn-outline:hover {
  background: rgba(0, 240, 255, 0.1);
  color: var(--accent-cyan);
}

.hero-features {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.hero-feature::before {
  content: "✓";
  color: var(--accent-red);
  font-weight: bold;
}

/* Section */
.section {
  padding: 60px 0;
}

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

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

.section-desc {
  text-align: center;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 40px;
}

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

.tag {
  padding: 6px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.tag.active {
  background: var(--accent-red);
  border-color: var(--accent-red);
  color: #fff;
}

/* Screenshot grid */
.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.screenshot-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: transform 0.3s, box-shadow 0.3s;
}

.screenshot-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

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

.screenshot-card-body {
  padding: 16px;
}

.screenshot-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.screenshot-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Feature cards */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

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

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: var(--accent-cyan);
}

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

/* Content article */
.content-article {
  max-width: 900px;
  margin: 0 auto;
}

.content-article h2 {
  font-size: 1.5rem;
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--accent-red);
}

.content-article h3 {
  font-size: 1.2rem;
  margin: 28px 0 12px;
  color: var(--accent-cyan);
}

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

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

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

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

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

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

.faq-question {
  padding: 18px 20px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-answer {
  padding: 0 20px 18px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* Download steps */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  counter-reset: step;
}

.step-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
  padding-top: 48px;
}

.step-item::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: 16px;
  left: 20px;
  width: 32px;
  height: 32px;
  background: var(--accent-red);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
}

.step-item h4 {
  margin-bottom: 8px;
}

.step-item p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Page header (sub pages) */
.page-header {
  padding: 48px 0 32px;
  background: var(--bg-secondary);
  text-align: center;
  border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
  font-size: 2rem;
  margin-bottom: 8px;
}

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

.page-content {
  padding: 48px 0 80px;
}

.legal-content h2 {
  font-size: 1.3rem;
  margin: 32px 0 12px;
  color: var(--accent-cyan);
}

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

.legal-content p,
.legal-content li {
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.legal-content ul {
  margin-left: 24px;
  margin-bottom: 16px;
}

/* Error pages */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 20px;
}

.error-code {
  font-size: 6rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-magenta));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.error-page h1 {
  font-size: 1.5rem;
  margin: 16px 0;
}

.error-page p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

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

.footer-links h4 {
  font-size: 1rem;
  margin-bottom: 16px;
}

.footer-links ul {
  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-cyan);
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.breadcrumb {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: right;
  box-sizing: border-box;
}

.breadcrumb-top {
  display: none;
}

.breadcrumb-page {
  width: 100%;
  padding: 16px 0;
}

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

.breadcrumb span {
  margin: 0 8px;
}

.breadcrumb-top > span:only-child {
  margin: 0;
}

.breadcrumb-top span:last-child {
  color: var(--text-secondary);
}

/* Internal links box */
.internal-links {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 24px;
  margin: 40px 0;
}

.internal-links h3 {
  font-size: 1rem;
  margin-bottom: 12px;
}

.internal-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  list-style: none;
}

/* Mobile */
@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: 20px;
    gap: 0;
    transform: translateY(-120%);
    opacity: 0;
    transition: 0.3s;
    border-bottom: 1px solid var(--border-color);
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
  }

  .main-nav li {
    border-bottom: 1px solid var(--border-color);
  }

  .main-nav a {
    display: block;
    padding: 14px 0;
  }

  .logo-text {
    display: none;
  }

  .header-inner {
    justify-content: flex-start;
    gap: 6px;
  }

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

  .breadcrumb-top {
    display: flex;
    flex: 1 1 auto;
    min-width: 0;
    margin: 0;
    padding: 0 6px 0 0;
    justify-content: flex-end;
    font-size: 0.72rem;
    overflow: hidden;
    white-space: nowrap;
  }

  .breadcrumb-top + .nav-toggle {
    margin-left: 0;
    flex-shrink: 0;
  }

  .breadcrumb-page {
    display: none;
  }

  .nav-toggle {
    flex-shrink: 0;
  }

  .hero {
    padding: 40px 0 30px;
  }

  .section {
    padding: 40px 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .screenshot-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .screenshot-card-body {
    padding: 10px;
  }

  .screenshot-card h3 {
    font-size: 0.85rem;
  }

  .screenshot-card p {
    display: none;
  }
}

@media (max-width: 480px) {
  .screenshot-grid {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

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

  .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
}