/* ============================================
   吃瓜视频 - 全网明星艺人公开演艺履历与作品档案库
   人物传记风 + 极简黑白配色方案
   ============================================ */

/* CSS Variables */
:root {
  --color-primary: #000000;
  --color-secondary: #9E9E9E;
  --color-bg: #FFFFFF;
  --color-card: #F5F5F5;
  --color-text: #333333;
  --color-border: #E0E0E0;
  --color-accent: #1A1A1A;
  --font-heading: "Noto Serif SC", "Source Han Serif CN", serif;
  --font-body: "Noto Sans SC", "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", sans-serif;
  --max-width: 1200px;
  --radius: 4px;
  --shadow: 0 2px 12px rgba(0,0,0,0.08);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

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

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

ul, ol {
  list-style: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-primary);
}

h1 { font-size: 2.5rem; margin-bottom: 1rem; }
h2 { font-size: 2rem; margin-bottom: 0.8rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.6rem; }
h4 { font-size: 1.25rem; margin-bottom: 0.5rem; }

p {
  margin-bottom: 1rem;
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4rem 0;
}

.section-alt {
  background-color: var(--color-card);
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

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

/* Navigation */
.main-nav ul {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.main-nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  position: relative;
  padding: 0.5rem 0;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
}

.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}

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

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

/* Hero Section */
.hero {
  position: relative;
  height: 70vh;
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--color-primary);
}

.hero-bg {
  position: absolute;
  inset: 0;
  opacity: 0.4;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--color-bg);
  padding: 2rem;
}

.hero-content h1 {
  color: var(--color-bg);
  font-size: 3rem;
  margin-bottom: 1.5rem;
  text-shadow: 0 2px 20px rgba(0,0,0,0.5);
}

.hero-content p {
  font-size: 1.2rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto 2rem;
}

.hero-search {
  display: flex;
  max-width: 500px;
  margin: 0 auto;
  background: rgba(255,255,255,0.15);
  border-radius: 50px;
  padding: 4px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.3);
}

.hero-search input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 0.8rem 1.5rem;
  color: #fff;
  font-size: 1rem;
  outline: none;
}

.hero-search input::placeholder {
  color: rgba(255,255,255,0.7);
}

.hero-search button {
  background: var(--color-bg);
  color: var(--color-primary);
  border: none;
  padding: 0.8rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.hero-search button:hover {
  background: var(--color-card);
}

/* Section Headers */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-primary);
  margin: 0.8rem auto 0;
}

.section-header p {
  color: var(--color-secondary);
  margin-top: 0.8rem;
  font-size: 1.05rem;
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}

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

.card-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/10;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.card:hover .card-image img {
  transform: scale(1.05);
}

.card-body {
  padding: 1.5rem;
}

.card-body h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.card-body p {
  color: var(--color-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

.card-tag {
  display: inline-block;
  background: var(--color-card);
  color: var(--color-text);
  padding: 0.2rem 0.8rem;
  border-radius: 20px;
  font-size: 0.75rem;
  margin-top: 0.8rem;
}

/* Profile Card (for celebrity pages) */
.profile-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 3rem;
  align-items: start;
}

.profile-photo {
  position: sticky;
  top: 100px;
}

.profile-photo img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.profile-info {
  padding: 1rem 0;
}

.profile-meta {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin: 1.5rem 0;
  padding: 1.5rem;
  background: var(--color-card);
  border-radius: var(--radius);
}

.meta-item {
  display: flex;
  flex-direction: column;
}

.meta-label {
  font-size: 0.8rem;
  color: var(--color-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.meta-value {
  font-weight: 600;
  color: var(--color-primary);
  margin-top: 0.2rem;
}

/* Timeline */
.timeline {
  position: relative;
  padding: 2rem 0;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-left: 60px;
  margin-bottom: 2.5rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease forwards;
}

.timeline-item:nth-child(1) { animation-delay: 0.1s; }
.timeline-item:nth-child(2) { animation-delay: 0.2s; }
.timeline-item:nth-child(3) { animation-delay: 0.3s; }
.timeline-item:nth-child(4) { animation-delay: 0.4s; }
.timeline-item:nth-child(5) { animation-delay: 0.5s; }
.timeline-item:nth-child(6) { animation-delay: 0.6s; }

.timeline-dot {
  position: absolute;
  left: 12px;
  top: 5px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-primary);
}

.timeline-year {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: var(--color-secondary);
  margin-bottom: 0.3rem;
}

.timeline-content h4 {
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
}

.timeline-content p {
  color: var(--color-secondary);
  font-size: 0.9rem;
}

/* Filter Tabs */
.filter-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.filter-tab {
  padding: 0.5rem 1.2rem;
  border: 1px solid var(--color-border);
  border-radius: 30px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
  background: transparent;
  color: var(--color-text);
}

.filter-tab:hover,
.filter-tab.active {
  background: var(--color-primary);
  color: var(--color-bg);
  border-color: var(--color-primary);
}

/* Award Card with Flip Effect */
.award-card {
  perspective: 1000px;
  height: 250px;
}

.award-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.8s;
  transform-style: preserve-3d;
}

.award-card:hover .award-card-inner {
  transform: rotateY(180deg);
}

.award-card-front,
.award-card-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: var(--radius);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}

.award-card-front {
  background: linear-gradient(135deg, #1a1a1a, #333);
  color: #fff;
}

.award-card-back {
  background: var(--color-card);
  transform: rotateY(180deg);
  border: 1px solid var(--color-border);
}

/* Data Chart Container */
.chart-container {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 2rem;
  margin: 2rem 0;
}

/* Social Panel */
.social-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin: 2rem 0;
}

.social-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--color-card);
  border-radius: var(--radius);
  transition: var(--transition);
}

.social-item:hover {
  box-shadow: var(--shadow);
}

.social-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
}

/* Waterfall / Masonry */
.masonry-grid {
  columns: 3;
  column-gap: 1.5rem;
}

.masonry-item {
  break-inside: avoid;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

/* Footer */
.site-footer {
  background: var(--color-primary);
  color: rgba(255,255,255,0.7);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  margin-top: 1rem;
  font-size: 0.9rem;
  line-height: 1.8;
}

.footer-links h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 1rem;
}

.footer-links ul li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: rgba(255,255,255,0.6);
  font-size: 0.85rem;
}

.footer-links a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 2rem;
  text-align: center;
  font-size: 0.8rem;
}

/* Breadcrumb */
.breadcrumb {
  padding: 1rem 0;
  font-size: 0.85rem;
  color: var(--color-secondary);
}

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

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

.breadcrumb span {
  margin: 0 0.5rem;
}

/* Page Header */
.page-header {
  background: var(--color-primary);
  color: #fff;
  padding: 4rem 0;
  text-align: center;
}

.page-header h1 {
  color: #fff;
  margin-bottom: 0.5rem;
}

.page-header p {
  opacity: 0.7;
  max-width: 600px;
  margin: 0 auto;
}

/* Table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
}

.data-table th,
.data-table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.data-table th {
  background: var(--color-card);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.data-table tr:hover td {
  background: var(--color-card);
}

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

.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 1.5rem 0;
}

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

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--color-secondary);
  transition: var(--transition);
}

.faq-item.active .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  color: var(--color-secondary);
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding-top: 1rem;
}

/* Search Page */
.search-box {
  max-width: 600px;
  margin: 2rem auto;
  display: flex;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius);
  overflow: hidden;
}

.search-box input {
  flex: 1;
  border: none;
  padding: 1rem 1.5rem;
  font-size: 1rem;
  outline: none;
}

.search-box button {
  background: var(--color-primary);
  color: #fff;
  border: none;
  padding: 1rem 2rem;
  font-weight: 600;
  cursor: pointer;
}

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

.search-result-item {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.search-result-item h3 {
  margin-bottom: 0.3rem;
}

.search-result-item p {
  color: var(--color-secondary);
  font-size: 0.9rem;
}

/* 404 Page */
.error-page {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

.error-code {
  font-size: 8rem;
  font-weight: 900;
  color: var(--color-card);
  line-height: 1;
}

/* Button */
.btn {
  display: inline-block;
  padding: 0.8rem 2rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: #333;
  color: #fff;
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-more {
  display: block;
  width: fit-content;
  margin: 2rem auto 0;
}

/* App Download */
.app-section {
  text-align: center;
  padding: 5rem 0;
}

.app-badges {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 2rem;
}

.app-badge {
  padding: 0.8rem 2rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius);
  font-weight: 600;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.fade-in {
  opacity: 0;
  animation: fadeIn 0.6s ease forwards;
}

/* Responsive */
@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .profile-layout {
    grid-template-columns: 1fr;
  }
  
  .profile-photo {
    position: static;
    max-width: 300px;
    margin: 0 auto;
  }
  
  .masonry-grid {
    columns: 2;
  }
}

@media (max-width: 768px) {
  html { font-size: 14px; }
  
  .menu-toggle { display: block; }
  
  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background: var(--color-bg);
    padding: 4rem 2rem;
    transition: var(--transition);
    box-shadow: -5px 0 20px rgba(0,0,0,0.1);
    z-index: 1001;
  }
  
  .main-nav.active {
    right: 0;
  }
  
  .main-nav ul {
    flex-direction: column;
    gap: 1.5rem;
  }
  
  .hero { height: 60vh; min-height: 400px; }
  .hero-content h1 { font-size: 2rem; }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .masonry-grid {
    columns: 1;
  }
  
  .profile-meta {
    grid-template-columns: 1fr;
  }
  
  .filter-tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
  }
}

@media (max-width: 480px) {
  .hero-search {
    flex-direction: column;
    border-radius: var(--radius);
  }
  
  .hero-search button {
    border-radius: var(--radius);
  }
  
  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.5rem; }
}

/* Print */
@media print {
  .site-header, .site-footer, .hero-search { display: none; }
  body { color: #000; }
}