/* ============================================
   九色数字艺术与先锋美学空间 - 主样式表
   风格：酸性设计 + 极简新粗野主义
   ============================================ */

/* CSS Variables */
:root {
  --acid-green: #CCFF00;
  --cyber-pink: #FF00FF;
  --cement-gray: #E5E5E5;
  --card-white: #FFFFFF;
  --text-black: #000000;
  --shadow-hard: 6px 6px 0px #000000;
  --shadow-hover: 10px 10px 0px #000000;
  --border-thick: 3px solid #000000;
  --font-display: 'Noto Sans SC', sans-serif;
  --font-body: 'Noto Sans SC', sans-serif;
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-glitch: 0.1s steps(3);
}

/* Reset & Base */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--cement-gray);
  color: var(--text-black);
  line-height: 1.7;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 8vw, 6rem); }
h2 { font-size: clamp(2rem, 5vw, 4rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2.5rem); }
h4 { font-size: clamp(1.2rem, 2vw, 1.8rem); }

p {
  font-size: 1rem;
  margin-bottom: 1.2em;
}

a {
  color: var(--text-black);
  text-decoration: none;
  transition: var(--transition-fast);
}

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

/* Utility Classes */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-padding {
  padding: 6rem 0;
}

.acid-bg { background-color: var(--acid-green); }
.pink-bg { background-color: var(--cyber-pink); }
.gray-bg { background-color: var(--cement-gray); }

/* Neo-Brutalist Card */
.brutal-card {
  background: var(--card-white);
  border: var(--border-thick);
  box-shadow: var(--shadow-hard);
  padding: 2rem;
  transition: var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.brutal-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translate(-4px, -4px);
}

/* Navigation */
.nav-main {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: var(--card-white);
  border-bottom: var(--border-thick);
  padding: 1rem 2rem;
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 900;
  text-transform: uppercase;
  background: var(--acid-green);
  padding: 0.3rem 1rem;
  border: 2px solid var(--text-black);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  align-items: center;
}

.nav-links a {
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  padding: 0.4rem 0.8rem;
  border: 2px solid transparent;
  transition: var(--transition-fast);
}

.nav-links a:hover {
  border: 2px solid var(--text-black);
  background: var(--acid-green);
  color: var(--text-black);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0.5rem;
}

.nav-toggle span {
  width: 28px;
  height: 3px;
  background: var(--text-black);
  transition: var(--transition-fast);
}

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

.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  padding: 2rem;
}

.hero-title {
  font-size: clamp(3rem, 12vw, 10rem);
  font-weight: 900;
  line-height: 0.9;
  text-transform: uppercase;
  mix-blend-mode: difference;
  color: var(--card-white);
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.8rem);
  margin-top: 2rem;
  font-weight: 400;
  background: var(--acid-green);
  display: inline-block;
  padding: 0.5rem 2rem;
  border: var(--border-thick);
}

/* Marquee */
.marquee-strip {
  background: var(--text-black);
  color: var(--acid-green);
  padding: 1rem 0;
  overflow: hidden;
  white-space: nowrap;
  border-top: var(--border-thick);
  border-bottom: var(--border-thick);
}

.marquee-content {
  display: inline-block;
  animation: marquee-scroll 20s linear infinite;
  font-size: 1.2rem;
  font-weight: 700;
  text-transform: uppercase;
}

@keyframes marquee-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Exhibition Section */
.exhibition-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.exhibition-card {
  position: relative;
  overflow: hidden;
}

.exhibition-card img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  border-bottom: var(--border-thick);
  transition: var(--transition-fast);
}

.exhibition-card:hover img {
  transform: scale(1.05);
  filter: hue-rotate(30deg);
}

.exhibition-info {
  padding: 1.5rem;
}

.exhibition-tag {
  display: inline-block;
  background: var(--acid-green);
  padding: 0.2rem 0.8rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  border: 2px solid var(--text-black);
  margin-bottom: 0.8rem;
}

/* Auction Section */
.auction-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.auction-card {
  position: relative;
}

.auction-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-bottom: var(--border-thick);
}

.auction-timer {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--cyber-pink);
  color: var(--card-white);
  padding: 0.5rem 1rem;
  font-weight: 900;
  font-size: 0.9rem;
  border: 2px solid var(--text-black);
  font-family: monospace;
}

.auction-details {
  padding: 1.5rem;
}

.auction-price {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--cyber-pink);
}

.bid-btn {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.8rem 2rem;
  background: var(--acid-green);
  border: var(--border-thick);
  font-weight: 900;
  text-transform: uppercase;
  cursor: pointer;
  transition: var(--transition-fast);
}

.bid-btn:hover {
  background: var(--cyber-pink);
  color: var(--card-white);
  box-shadow: var(--shadow-hard);
}

/* Artist Section */
.artist-flow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.artist-card {
  text-align: center;
}

.artist-avatar {
  width: 150px;
  height: 150px;
  border-radius: 0;
  border: var(--border-thick);
  object-fit: cover;
  margin: 0 auto 1.5rem;
  transition: var(--transition-fast);
}

.artist-card:hover .artist-avatar {
  transform: rotate(-5deg);
  box-shadow: var(--shadow-hard);
}

.artist-name {
  font-size: 1.3rem;
  font-weight: 900;
  text-transform: uppercase;
}

.artist-medium {
  font-size: 0.85rem;
  color: #666;
  margin-top: 0.5rem;
}

/* Magazine Section */
.magazine-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
  margin-top: 3rem;
}

.magazine-featured {
  grid-row: span 2;
}

.magazine-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-bottom: var(--border-thick);
}

.magazine-meta {
  font-size: 0.8rem;
  color: #666;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

/* Reveal Effect (Scratch Card) */
.reveal-container {
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.reveal-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    45deg,
    var(--text-black),
    var(--text-black) 10px,
    #333 10px,
    #333 20px
  );
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--acid-green);
  font-weight: 900;
  font-size: 1.2rem;
  text-transform: uppercase;
  transition: opacity 0.5s ease;
}

.reveal-container:hover .reveal-overlay {
  opacity: 0;
  pointer-events: none;
}

/* 3D Viewer */
.viewer-3d {
  width: 100%;
  height: 400px;
  border: var(--border-thick);
  background: #111;
  position: relative;
  cursor: grab;
  overflow: hidden;
}

.viewer-3d:active {
  cursor: grabbing;
}

/* Footer */
.footer-main {
  background: var(--text-black);
  color: var(--card-white);
  padding: 4rem 2rem 2rem;
  border-top: 4px solid var(--acid-green);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  max-width: 1400px;
  margin: 0 auto;
}

.footer-col h4 {
  color: var(--acid-green);
  margin-bottom: 1.5rem;
  font-size: 1rem;
}

.footer-col a {
  color: #ccc;
  display: block;
  margin-bottom: 0.8rem;
  font-size: 0.9rem;
}

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

.footer-bottom {
  border-top: 1px solid #333;
  margin-top: 3rem;
  padding-top: 2rem;
  text-align: center;
  font-size: 0.85rem;
  color: #666;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
}

/* Breadcrumb */
.breadcrumb {
  padding: 1rem 0;
  font-size: 0.85rem;
  margin-top: 80px;
}

.breadcrumb a {
  color: #666;
}

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

.breadcrumb span {
  margin: 0 0.5rem;
  color: #999;
}

/* Page Header */
.page-header {
  padding: 4rem 0 3rem;
  border-bottom: var(--border-thick);
  margin-bottom: 3rem;
}

.page-header h1 {
  font-size: clamp(2rem, 6vw, 4.5rem);
}

.page-header .page-desc {
  margin-top: 1.5rem;
  font-size: 1.1rem;
  max-width: 700px;
}

/* Content Sections */
.content-block {
  margin-bottom: 3rem;
  padding: 2rem;
  background: var(--card-white);
  border: var(--border-thick);
  box-shadow: var(--shadow-hard);
}

.content-block h2 {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--acid-green);
}

/* FAQ */
.faq-item {
  border: var(--border-thick);
  margin-bottom: 1rem;
  background: var(--card-white);
}

.faq-question {
  padding: 1.2rem 1.5rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition-fast);
}

.faq-question:hover {
  background: var(--acid-green);
}

.faq-answer {
  padding: 0 1.5rem 1.2rem;
  display: none;
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  display: block;
}

/* Search Page */
.search-box {
  display: flex;
  gap: 0;
  margin: 2rem 0;
}

.search-input {
  flex: 1;
  padding: 1rem 1.5rem;
  border: var(--border-thick);
  font-size: 1.1rem;
  font-family: var(--font-body);
  outline: none;
}

.search-input:focus {
  box-shadow: inset 0 0 0 2px var(--acid-green);
}

.search-btn {
  padding: 1rem 2rem;
  background: var(--acid-green);
  border: var(--border-thick);
  border-left: none;
  font-weight: 900;
  text-transform: uppercase;
  cursor: pointer;
  transition: var(--transition-fast);
}

.search-btn:hover {
  background: var(--cyber-pink);
  color: var(--card-white);
}

.search-results {
  margin-top: 2rem;
}

.search-result-item {
  padding: 1.5rem;
  border: var(--border-thick);
  margin-bottom: 1rem;
  background: var(--card-white);
  transition: var(--transition-fast);
}

.search-result-item:hover {
  box-shadow: var(--shadow-hard);
}

/* APP Download Page */
.app-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  padding: 4rem 0;
}

.app-mockup img {
  width: 100%;
  max-width: 350px;
  border: var(--border-thick);
  box-shadow: var(--shadow-hard);
}

.download-btn {
  display: inline-block;
  padding: 1rem 3rem;
  background: var(--acid-green);
  border: var(--border-thick);
  font-weight: 900;
  font-size: 1.1rem;
  text-transform: uppercase;
  margin-right: 1rem;
  margin-top: 1rem;
  transition: var(--transition-fast);
}

.download-btn:hover {
  background: var(--cyber-pink);
  color: var(--card-white);
  box-shadow: var(--shadow-hover);
}

/* 404 Page */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

.error-code {
  font-size: clamp(6rem, 20vw, 15rem);
  font-weight: 900;
  line-height: 1;
  -webkit-text-stroke: 3px var(--text-black);
  color: transparent;
  animation: glitch-text 2s infinite;
}

@keyframes glitch-text {
  0%, 100% { text-shadow: 2px 0 var(--acid-green), -2px 0 var(--cyber-pink); }
  25% { text-shadow: -2px 0 var(--acid-green), 2px 0 var(--cyber-pink); }
  50% { text-shadow: 2px 2px var(--acid-green), -2px -2px var(--cyber-pink); }
  75% { text-shadow: -2px 2px var(--acid-green), 2px -2px var(--cyber-pink); }
}

/* Glitch Animation */
.glitch-effect {
  animation: glitch-skew 1s infinite linear alternate-reverse;
}

@keyframes glitch-skew {
  0% { transform: skew(0deg); }
  20% { transform: skew(-0.5deg); }
  40% { transform: skew(0.5deg); }
  60% { transform: skew(-0.3deg); }
  80% { transform: skew(0.3deg); }
  100% { transform: skew(0deg); }
}

/* Distortion Hover */
.distort-hover:hover {
  animation: distort 0.3s ease;
}

@keyframes distort {
  0% { transform: scale(1) rotate(0deg); }
  25% { transform: scale(1.02) rotate(-1deg); }
  50% { transform: scale(0.98) rotate(1deg); }
  75% { transform: scale(1.01) rotate(-0.5deg); }
  100% { transform: scale(1) rotate(0deg); }
}

/* Responsive */
@media (max-width: 1024px) {
  .magazine-grid {
    grid-template-columns: 1fr;
  }
  
  .app-hero {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .app-mockup img {
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--card-white);
    flex-direction: column;
    padding: 2rem;
    border-bottom: var(--border-thick);
    gap: 1rem;
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .hero-title {
    font-size: clamp(2.5rem, 10vw, 5rem);
  }
  
  .exhibition-grid {
    grid-template-columns: 1fr;
  }
  
  .auction-grid {
    grid-template-columns: 1fr;
  }
  
  .artist-flow {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .section-padding {
    padding: 3rem 0;
  }
  
  .container {
    padding: 0 1rem;
  }
}

@media (max-width: 480px) {
  .artist-flow {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

/* Schema & SEO Hidden */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Print Styles */
@media print {
  .nav-main, .marquee-strip, .hero-canvas {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
}