/* StreamTech - 电竞直播技术与OBS方案服务商 */
/* 极客技术风：代码黑 #1E1E1E + 终端绿 #00FF00 + 科技灰 #9E9E9E */

:root {
  --code-black: #1E1E1E;
  --terminal-green: #00FF00;
  --tech-gray: #9E9E9E;
  --dark-bg: #121212;
  --card-bg: #2A2A2A;
  --text-primary: #E0E0E0;
  --text-secondary: #B0B0B0;
  --accent-dim: #00CC00;
  --border-color: #3A3A3A;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Courier New', 'Source Code Pro', monospace;
  background-color: var(--code-black);
  color: var(--text-primary);
  line-height: 1.8;
  font-size: 16px;
}

a {
  color: var(--terminal-green);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--accent-dim);
  text-decoration: underline;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header & Navigation */
.site-header {
  background: var(--dark-bg);
  border-bottom: 1px solid var(--terminal-green);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 0;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.site-logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--terminal-green);
  letter-spacing: 2px;
}

.site-logo span {
  color: var(--text-primary);
}

.main-nav {
  display: flex;
  gap: 5px;
}

.main-nav a {
  padding: 8px 14px;
  border-radius: 4px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: all 0.3s ease;
}

.main-nav a:hover,
.main-nav a.active {
  background: rgba(0, 255, 0, 0.1);
  color: var(--terminal-green);
  text-decoration: none;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.mobile-toggle span {
  width: 25px;
  height: 2px;
  background: var(--terminal-green);
  transition: 0.3s;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, var(--dark-bg) 0%, var(--code-black) 50%, #0a1a0a 100%);
  padding: 100px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 255, 0, 0.03) 2px,
    rgba(0, 255, 0, 0.03) 4px
  );
  pointer-events: none;
}

.hero-section h1 {
  font-size: 2.8rem;
  color: var(--terminal-green);
  margin-bottom: 20px;
  text-shadow: 0 0 20px rgba(0, 255, 0, 0.3);
  position: relative;
}

.hero-section p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 30px;
  position: relative;
}

.hero-cta {
  display: inline-block;
  padding: 14px 36px;
  background: var(--terminal-green);
  color: var(--code-black);
  font-weight: bold;
  border-radius: 4px;
  font-size: 1rem;
  transition: all 0.3s ease;
  position: relative;
}

.hero-cta:hover {
  background: var(--accent-dim);
  color: var(--code-black);
  text-decoration: none;
  box-shadow: 0 0 20px rgba(0, 255, 0, 0.4);
}

/* Section Styles */
.section {
  padding: 80px 20px;
}

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

.section-title {
  font-size: 2rem;
  color: var(--terminal-green);
  text-align: center;
  margin-bottom: 15px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 50px;
  font-size: 1rem;
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 30px;
  transition: all 0.3s ease;
}

.card:hover {
  border-color: var(--terminal-green);
  box-shadow: 0 0 15px rgba(0, 255, 0, 0.1);
  transform: translateY(-3px);
}

.card h3 {
  color: var(--terminal-green);
  margin-bottom: 12px;
  font-size: 1.3rem;
}

.card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
  display: block;
}

/* Feature List */
.feature-list {
  list-style: none;
  padding: 0;
}

.feature-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
  position: relative;
  padding-left: 20px;
}

.feature-list li::before {
  content: '>';
  position: absolute;
  left: 0;
  color: var(--terminal-green);
  font-weight: bold;
}

/* Video Module */
.video-wrapper {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  margin: 30px 0;
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* Hardware Products */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 25px;
  max-width: 1200px;
  margin: 0 auto;
}

.product-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.product-card:hover {
  border-color: var(--terminal-green);
  transform: translateY(-2px);
}

.product-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.product-info {
  padding: 20px;
}

.product-info h4 {
  color: var(--terminal-green);
  margin-bottom: 8px;
}

.product-info .price {
  color: var(--terminal-green);
  font-size: 1.2rem;
  font-weight: bold;
}

/* Tutorial Cards */
.tutorial-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 25px;
  margin-bottom: 20px;
  transition: all 0.3s ease;
}

.tutorial-card:hover {
  border-color: var(--terminal-green);
}

.tutorial-card h3 {
  color: var(--terminal-green);
  margin-bottom: 10px;
}

.tutorial-card .meta {
  color: var(--tech-gray);
  font-size: 0.85rem;
  margin-bottom: 10px;
}

/* Case Studies */
.case-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 30px;
}

.case-card img {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.case-content {
  padding: 25px;
}

.case-content h3 {
  color: var(--terminal-green);
  margin-bottom: 10px;
}

.case-tag {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(0, 255, 0, 0.1);
  color: var(--terminal-green);
  border-radius: 3px;
  font-size: 0.8rem;
  margin-right: 8px;
  margin-bottom: 8px;
}

/* Contact Form */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  color: var(--terminal-green);
  margin-bottom: 8px;
  font-size: 0.9rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  background: var(--dark-bg);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--terminal-green);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.btn-submit {
  display: inline-block;
  padding: 14px 40px;
  background: var(--terminal-green);
  color: var(--code-black);
  font-weight: bold;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s;
}

.btn-submit:hover {
  background: var(--accent-dim);
  box-shadow: 0 0 15px rgba(0, 255, 0, 0.3);
}

/* Footer */
.site-footer {
  background: var(--dark-bg);
  border-top: 1px solid var(--terminal-green);
  padding: 50px 20px 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto 30px;
}

.footer-col h4 {
  color: var(--terminal-green);
  margin-bottom: 15px;
  font-size: 1.1rem;
}

.footer-col p,
.footer-col a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 2;
}

.footer-col a:hover {
  color: var(--terminal-green);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
  color: var(--tech-gray);
  font-size: 0.85rem;
}

/* E-A-T Authority */
.authority-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
  padding: 30px 20px;
  background: var(--dark-bg);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.authority-bar span {
  color: var(--tech-gray);
  font-size: 0.9rem;
}

/* Breadcrumb */
.breadcrumb {
  padding: 15px 20px;
  max-width: 1200px;
  margin: 0 auto;
  font-size: 0.85rem;
  color: var(--tech-gray);
}

.breadcrumb a {
  color: var(--tech-gray);
}

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

/* Responsive */
@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--dark-bg);
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--terminal-green);
  }

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

  .hero-section {
    padding: 60px 20px;
  }

  .hero-section h1 {
    font-size: 1.8rem;
  }

  .section {
    padding: 50px 15px;
  }

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

  .authority-bar {
    gap: 20px;
  }

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

@media (max-width: 480px) {
  .hero-section h1 {
    font-size: 1.5rem;
  }

  .nav-wrapper {
    padding: 12px 15px;
  }
}

/* Lazy loading placeholder */
.lazy-img {
  opacity: 0;
  transition: opacity 0.5s ease;
}

.lazy-img.loaded {
  opacity: 1;
}

/* Code-style decorations */
.code-prefix::before {
  content: '$ ';
  color: var(--terminal-green);
}

/* Comparison before/after */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 30px 0;
}

.comparison-grid img {
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

@media (max-width: 600px) {
  .comparison-grid {
    grid-template-columns: 1fr;
  }
}