/* ========================================
   二手球料吧 - 全局样式
   复古编辑风格 × 足球社区
   ======================================== */

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

html {
  scroll-behavior: smooth;
}

:root {
  --color-primary: #0B3D2E;
  --color-primary-dark: #062921;
  --color-secondary: #C9A227;
  --color-secondary-light: #DDB94A;
  --color-bg: #F5F0E8;
  --color-bg-alt: #E8E4DC;
  --color-text: #1A1A1A;
  --color-text-light: #5C5C5C;
  --color-text-muted: #8A8A8A;
  --color-accent: #8B2635;
  --color-white: #FFFFFF;
  --font-display: Georgia, "Noto Serif SC", "Songti SC", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --shadow-sm: 0 2px 8px rgba(11, 61, 46, 0.08);
  --shadow-md: 0 8px 24px rgba(11, 61, 46, 0.12);
  --shadow-lg: 0 16px 48px rgba(11, 61, 46, 0.16);
  --radius: 4px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.04'/%3E%3C/svg%3E");
  z-index: 9999;
  opacity: 0.6;
}

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

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 排版 */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.3;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  color: var(--color-primary);
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--color-secondary);
}

.section-subtitle {
  color: var(--color-text-light);
  font-size: 1.05rem;
  margin-bottom: 40px;
  max-width: 600px;
}

.section-header {
  margin-bottom: 48px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  letter-spacing: 0.02em;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

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

.btn-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 18px 0;
  transition: var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background-color: var(--color-primary);
  padding: 12px 0;
  box-shadow: var(--shadow-md);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-white);
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
}

.nav-logo img {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-secondary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}

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

.nav-links a:hover {
  color: var(--color-white);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-white);
  transition: var(--transition);
}

/* Hero 区域 */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    radial-gradient(circle at 20% 80%, rgba(201, 162, 39, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(139, 38, 53, 0.12) 0%, transparent 50%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 160px;
  background: linear-gradient(to top, var(--color-bg), transparent);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 100px;
  font-size: 0.85rem;
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  margin-bottom: 24px;
  max-width: 800px;
  line-height: 1.15;
}

.hero h1 span {
  color: var(--color-secondary);
}

.hero p {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-decoration {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  width: 380px;
  height: 380px;
  border: 2px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  pointer-events: none;
}

.hero-decoration::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 280px;
  height: 280px;
  border: 1px solid rgba(201, 162, 39, 0.2);
  border-radius: 50%;
}

/* 区块通用 */
.section {
  padding: 100px 0;
}

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

/* 网格 */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

/* 卡片 */
.card {
  background-color: var(--color-white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid rgba(11, 61, 46, 0.06);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg-alt);
  border-radius: 50%;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.card h3 {
  color: var(--color-primary);
  margin-bottom: 12px;
  font-size: 1.25rem;
}

.card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* 资料类型卡片 */
.type-card {
  position: relative;
  background-color: var(--color-white);
  border-radius: var(--radius);
  padding: 40px 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border-top: 4px solid var(--color-secondary);
  overflow: hidden;
}

.type-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.type-card::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 100px;
  height: 100px;
  background-color: var(--color-bg-alt);
  border-radius: 0 0 0 100%;
  opacity: 0.5;
}

.type-number {
  position: absolute;
  top: 20px;
  right: 24px;
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-bg-alt);
  line-height: 1;
}

/* 文章卡片 */
.article-card {
  background-color: var(--color-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.article-body {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-meta {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.article-card h3 {
  color: var(--color-primary);
  margin-bottom: 12px;
  font-size: 1.2rem;
  line-height: 1.4;
}

.article-card h3 a:hover {
  color: var(--color-accent);
}

.article-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.7;
  flex: 1;
}

.article-tags {
  display: flex;
  gap: 8px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  padding: 4px 12px;
  background-color: var(--color-bg-alt);
  color: var(--color-text-light);
  font-size: 0.75rem;
  border-radius: 100px;
  font-weight: 500;
}

/* 文章列表页 */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.article-list-item {
  background-color: var(--color-white);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border-left: 4px solid var(--color-secondary);
}

.article-list-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(6px);
}

.article-list-item h3 {
  color: var(--color-primary);
  margin-bottom: 10px;
  font-size: 1.3rem;
}

.article-list-item h3 a:hover {
  color: var(--color-accent);
}

.article-list-item .summary {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.article-list-item .meta {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* 故事卡片 */
.story-card {
  background-color: var(--color-white);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
}

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

.story-card::before {
  content: """;
  position: absolute;
  top: 20px;
  right: 28px;
  font-family: Georgia, serif;
  font-size: 4rem;
  color: var(--color-bg-alt);
  line-height: 1;
}

.story-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.story-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
}

.story-info strong {
  display: block;
  color: var(--color-primary);
  font-size: 1.05rem;
}

.story-info span {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.story-card p {
  color: var(--color-text-light);
  line-height: 1.8;
  position: relative;
  z-index: 1;
}

/* 页面横幅 */
.page-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  padding: 160px 0 100px;
  position: relative;
  overflow: hidden;
}

.page-banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(circle at 80% 80%, rgba(201, 162, 39, 0.12) 0%, transparent 50%);
}

.page-banner .container {
  position: relative;
  z-index: 1;
}

.page-banner h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  margin-bottom: 16px;
}

.page-banner p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
}

/* 时间线 */
.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  left: 12px;
  width: 2px;
  height: 100%;
  background-color: var(--color-bg-alt);
}

.timeline-item {
  position: relative;
  padding-bottom: 40px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  top: 6px;
  left: -34px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background-color: var(--color-secondary);
  border: 3px solid var(--color-bg);
}

.timeline-item h3 {
  color: var(--color-primary);
  margin-bottom: 8px;
  font-size: 1.2rem;
}

.timeline-item .time {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
  display: block;
}

.timeline-item p {
  color: var(--color-text-light);
}

/* 文章详情页 */
.article-detail {
  max-width: 800px;
  margin: 0 auto;
  padding: 60px 0;
}

.article-detail h1 {
  color: var(--color-primary);
  margin-bottom: 20px;
  line-height: 1.3;
}

.article-detail .article-meta-bar {
  display: flex;
  gap: 20px;
  align-items: center;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-bg-alt);
  margin-bottom: 32px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.article-detail .content {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--color-text);
}

.article-detail .content h2 {
  color: var(--color-primary);
  margin: 40px 0 20px;
  font-size: 1.5rem;
}

.article-detail .content h3 {
  color: var(--color-primary);
  margin: 32px 0 16px;
  font-size: 1.25rem;
}

.article-detail .content p {
  margin-bottom: 20px;
}

.article-detail .content ul,
.article-detail .content ol {
  margin-bottom: 24px;
  padding-left: 28px;
}

.article-detail .content li {
  margin-bottom: 10px;
}

.article-detail .content strong {
  color: var(--color-primary);
}

.article-detail .content blockquote {
  border-left: 4px solid var(--color-secondary);
  padding-left: 24px;
  margin: 28px 0;
  color: var(--color-text-light);
  font-style: italic;
}

/* CTA 区域 */
.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  padding: 100px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(circle at 50% 50%, rgba(201, 162, 39, 0.1) 0%, transparent 60%);
}

.cta-section .container {
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  margin-bottom: 16px;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 32px;
  font-size: 1.1rem;
}

/* 页脚 */
.footer {
  background-color: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand h3 {
  color: var(--color-white);
  font-size: 1.4rem;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.95rem;
  line-height: 1.8;
  max-width: 320px;
}

.footer-links h4 {
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: 20px;
}

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

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

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
}

/* 回到顶部 */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: var(--color-white);
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  box-shadow: var(--shadow-md);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--color-secondary);
  transform: translateY(-4px);
}

/* 动画 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 响应式 */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-decoration {
    width: 280px;
    height: 280px;
    opacity: 0.5;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 70px 0;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    max-width: 300px;
    height: 100vh;
    background-color: var(--color-primary);
    flex-direction: column;
    padding: 100px 32px 32px;
    transition: var(--transition);
    gap: 24px;
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .nav-toggle {
    display: flex;
    z-index: 1001;
  }
  
  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
  
  .hero {
    padding-top: 100px;
    min-height: auto;
    padding-bottom: 80px;
  }
  
  .hero-decoration {
    display: none;
  }
  
  .btn-group {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .timeline {
    padding-left: 28px;
  }
  
  .page-banner {
    padding: 140px 0 80px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .card,
  .type-card,
  .story-card,
  .article-list-item {
    padding: 24px;
  }
}