/* 51今日大赛 - 比赛榜单平台专属风格 */
:root {
  --primary: #ff6b35;
  --primary-dark: #e55a2b;
  --accent: #f7c948;
  --accent-alt: #ff8c42;
  --bg-page: #1a1a2e;
  --bg-card: #16213e;
  --bg-panel: #0f3460;
  --text-primary: #eaeaea;
  --text-secondary: #a0aec0;
  --text-muted: #718096;
  --border: #2d3748;
  --rank-gold: #ffd700;
  --rank-silver: #c0c0c0;
  --rank-bronze: #cd7f32;
  --shadow: 0 4px 20px rgba(0,0,0,0.3);
  --font-main: "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

body {
  font-family: var(--font-main);
  background: var(--bg-page);
  color: var(--text-primary);
  line-height: 1.65;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* 顶部导航 */
.header {
  background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-panel) 100%);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 14px 24px;
  border-bottom: 3px solid var(--primary);
  box-shadow: var(--shadow);
}

.nav {
  max-width: 1140px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 1px;
}

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

.nav-links {
  display: flex;
  gap: 6px;
  list-style: none;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding: 8px 16px;
  border-radius: 6px;
  transition: all 0.25s;
}

.nav-links a:hover {
  background: var(--primary);
  color: #fff;
}

/* 主内容 */
.main {
  max-width: 1140px;
  margin: 0 auto;
  padding: 95px 20px 45px;
}

/* Hero区 */
.hero {
  position: relative;
  height: 320px;
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 32px;
  border: 2px solid var(--border);
}

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

.hero-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 45px 28px 22px;
  background: linear-gradient(transparent, rgba(22,33,62,0.98));
}

.hero h1 {
  font-size: 1.9rem;
  margin-bottom: 8px;
  color: var(--accent);
}

.hero p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* 介绍区 */
.intro-section {
  background: var(--bg-card);
  padding: 32px 36px;
  border-radius: 12px;
  margin-bottom: 32px;
  border: 1px solid var(--border);
}

.intro-section .section-title {
  font-size: 1.35rem;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--primary);
  display: inline-block;
}

.intro-section p {
  color: var(--text-secondary);
  margin-bottom: 14px;
  text-align: justify;
}

/* 榜单/比赛区 */
.section-title {
  font-size: 1.3rem;
  margin-bottom: 18px;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--accent);
  display: inline-block;
}

.feature-section {
  margin-bottom: 36px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.feature-item {
  background: var(--bg-panel);
  padding: 22px;
  border-radius: 10px;
  border: 1px solid var(--border);
  transition: all 0.3s;
}

.feature-item:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

.feature-icon {
  font-size: 1.8rem;
  margin-bottom: 10px;
}

.feature-item h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.feature-item p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-bottom: 12px;
  line-height: 1.55;
}

.feature-link {
  color: var(--primary);
  font-size: 0.88rem;
  font-weight: 600;
}

.feature-link:hover {
  color: var(--accent);
}

/* 榜单卡片 */
.page-title {
  font-size: 1.5rem;
  margin-bottom: 22px;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--primary);
  display: inline-block;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin: 28px 0;
}

.card {
  background: var(--bg-card);
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.3s;
}

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

.card-img {
  aspect-ratio: 16/9;
  overflow: hidden;
}

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

.card-body {
  padding: 16px;
}

.card-title {
  font-size: 1rem;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-desc {
  color: var(--text-muted);
  font-size: 0.85rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-rank {
  display: inline-block;
  width: 24px;
  height: 24px;
  line-height: 24px;
  text-align: center;
  border-radius: 50%;
  font-size: 0.8rem;
  font-weight: 700;
  margin-right: 8px;
}

.card-rank.gold { background: var(--rank-gold); color: #333; }
.card-rank.silver { background: var(--rank-silver); color: #333; }
.card-rank.bronze { background: var(--rank-bronze); color: #fff; }

/* 快速导航 */
.quick-links-section {
  margin-top: 36px;
}

.quick-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.quick-link-card {
  background: var(--bg-panel);
  padding: 18px;
  border-radius: 10px;
  text-align: center;
  border: 1px solid var(--border);
  transition: all 0.3s;
}

.quick-link-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
}

.quick-link-title {
  display: block;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.quick-link-desc {
  display: block;
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* 内容页 */
.breadcrumb {
  margin-bottom: 14px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

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

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

.article-header { margin-bottom: 22px; }
.article-title { font-size: 1.55rem; margin-bottom: 10px; line-height: 1.4; }
.article-meta { color: var(--text-muted); font-size: 0.88rem; }

.article-content {
  background: var(--bg-card);
  padding: 34px;
  border-radius: 12px;
  margin-bottom: 34px;
  border: 1px solid var(--border);
}

.article-content h2 {
  font-size: 1.2rem;
  margin: 24px 0 12px;
  color: var(--primary);
}

.article-content p {
  margin-bottom: 14px;
  color: var(--text-secondary);
  text-align: justify;
}

.article-content .intro {
  font-size: 1rem;
  color: var(--text-primary);
}

.article-img {
  margin: 20px 0;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.article-img img {
  width: 100%;
}

/* 页脚 */
.footer {
  background: var(--bg-panel);
  padding: 28px 20px;
  margin-top: 40px;
  border-top: 2px solid var(--border);
}

.footer-inner {
  max-width: 1140px;
  margin: 0 auto;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 22px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.88rem;
}

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

.footer p {
  color: var(--text-muted);
  font-size: 0.82rem;
}

/* 响应式 */
@media (max-width: 768px) {
  .header { padding: 12px 16px; }
  .logo { font-size: 1.3rem; }
  .nav-links a { padding: 6px 12px; font-size: 0.85rem; }
  .main { padding: 85px 16px 38px; }
  .page-title, .section-title { font-size: 1.25rem; }
  .intro-section { padding: 24px; }
  .hero { height: 200px; }
  .hero h1 { font-size: 1.4rem; }
  .hero-overlay { padding: 28px 18px 18px; }
  .card-grid { grid-template-columns: 1fr; gap: 16px; }
  .feature-grid { grid-template-columns: 1fr; }
  .quick-links { grid-template-columns: repeat(2, 1fr); }
  .article-content { padding: 24px; }
  .article-title { font-size: 1.35rem; }
  .footer-links { flex-direction: column; gap: 10px; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.2rem; }
  .quick-links { grid-template-columns: 1fr; }
  .article-content { padding: 20px; }
}