/* =====================================================
   MotoGP 观赛辅助网站 - 全站样式
   主题：热血竞技红黑金配色
   ===================================================== */

:root {
  --primary:    #e8001d;   /* MotoGP 经典红 */
  --primary-dk: #a80015;
  --gold:       #f5c518;
  --dark:       #0d0d0d;
  --dark-2:     #1a1a1a;
  --dark-3:     #242424;
  --card-bg:    #1e1e1e;
  --border:     rgba(255,255,255,0.08);
  --text:       #f0f0f0;
  --text-muted: #888;
  --radius:     12px;
  --radius-sm:  8px;
  --shadow:     0 4px 24px rgba(0,0,0,0.5);
  --transition: 0.25s cubic-bezier(.4,0,.2,1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--dark);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, select, textarea { font-family: inherit; }

/* ── 滚动条 ─────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--dark-2); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

/* ── 通用工具 ───────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 60px 0; }
.section-title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-title::before {
  content: '';
  display: block;
  width: 4px;
  height: 1.8rem;
  background: var(--primary);
  border-radius: 2px;
  flex-shrink: 0;
}
.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: .5px;
  text-transform: uppercase;
}
.badge-red   { background: var(--primary); color: #fff; }
.badge-gold  { background: var(--gold); color: #000; }
.badge-gray  { background: #333; color: #ccc; }
.badge-green { background: #1db954; color: #fff; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dk); transform: translateY(-2px); }
.btn-outline { border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.card:hover { border-color: rgba(232,0,29,0.35); transform: translateY(-3px); box-shadow: var(--shadow); }

/* ── 顶部导航 ───────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13,13,13,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: -0.5px;
}
.navbar-logo span { color: var(--primary); }
.navbar-logo em {
  font-style: normal;
  font-size: 0.62rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 1px;
  display: block;
  line-height: 1;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-links a:hover, .nav-links a.active { color: var(--text); background: var(--dark-3); }
.nav-links a.active { color: var(--primary); }

.navbar-right { display: flex; align-items: center; gap: 12px; }
.search-btn {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--dark-3);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  transition: var(--transition);
}
.search-btn:hover { background: var(--primary); }

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端导航抽屉 */
.mobile-nav {
  display: none;
  flex-direction: column;
  background: var(--dark-2);
  border-top: 1px solid var(--border);
  padding: 16px 20px;
  gap: 4px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: var(--transition);
}
.mobile-nav a:hover { color: var(--text); background: var(--dark-3); }

/* ── 搜索弹层 ───────────────────────────── */
.search-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.8);
  z-index: 2000;
  align-items: flex-start;
  justify-content: center;
  padding-top: 120px;
}
.search-overlay.open { display: flex; }
.search-box {
  width: 100%;
  max-width: 620px;
  background: var(--dark-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin: 0 20px;
}
.search-box input {
  width: 100%;
  background: var(--dark-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-size: 1.1rem;
  color: var(--text);
  outline: none;
}
.search-box input:focus { border-color: var(--primary); }
.search-hints { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 8px; }
.search-hints span {
  background: var(--dark-3);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 14px;
  font-size: 0.82rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}
.search-hints span:hover { border-color: var(--primary); color: var(--primary); }

/* ── Hero Banner 轮播 ──────────────────── */
.hero {
  position: relative;
  height: 520px;
  overflow: hidden;
}
@media(max-width:768px){ .hero { height: 300px; } }

.hero-slides { display: flex; height: 100%; transition: transform 0.6s cubic-bezier(.4,0,.2,1); }
.hero-slide {
  flex-shrink: 0;
  width: 100%;
  height: 100%;
  position: relative;
  background: var(--dark-2);
  overflow: hidden;
}
.hero-slide img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 1;
}
.hero-slide-placeholder {
  width: 100%; height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  position: relative;
}
.hero-slide-placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.2), rgba(0,0,0,0.5));
  pointer-events: none;
}
.hero-content {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 40px;
  background: linear-gradient(transparent, rgba(0,0,0,0.85));
}
@media(max-width:768px){ .hero-content { padding: 20px; } }

.hero-tag {
  background: var(--primary);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 10px;
}
.hero-title {
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 8px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.5);
}
@media(max-width:768px){ .hero-title { font-size: 1.4rem; } }
.hero-subtitle { font-size: 0.95rem; color: #ccc; margin-bottom: 16px; }

.hero-countdown {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}
.countdown-unit {
  background: rgba(0,0,0,0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  text-align: center;
  min-width: 58px;
}
.countdown-unit .num {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--gold);
  line-height: 1;
}
.countdown-unit .lbl { font-size: 0.65rem; color: var(--text-muted); }

.hero-controls {
  position: absolute;
  top: 50%; right: 24px;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.hero-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  cursor: pointer;
  transition: var(--transition);
}
.hero-dot.active { background: var(--primary); transform: scale(1.3); }

.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(0,0,0,0.5);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  transition: var(--transition);
  z-index: 10;
}
.hero-arrow:hover { background: var(--primary); }
.hero-arrow-prev { left: 20px; }
.hero-arrow-next { right: 20px; }
@media(max-width:480px){ .hero-arrow { display: none; } }

/* ── 赛季速览 ────────────────────────────── */
.overview-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
}
@media(max-width:900px){ .overview-grid { grid-template-columns: 1fr 1fr; } }
@media(max-width:540px){ .overview-grid { grid-template-columns: 1fr; } }

.overview-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.overview-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.overview-card-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.standings-mini-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
.standings-mini-row:last-child { border-bottom: none; }
.standings-mini-pos {
  width: 22px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  flex-shrink: 0;
}
.standings-mini-pos.p1 { color: var(--gold); }
.standings-mini-pos.p2 { color: #c0c0c0; }
.standings-mini-pos.p3 { color: #cd7f32; }
.standings-mini-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--dark-3);
  overflow: hidden;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
}
.standings-mini-name { flex: 1; font-size: 0.9rem; font-weight: 600; }
.standings-mini-pts { font-size: 0.9rem; font-weight: 700; color: var(--primary); }

.next-race-card { display: flex; flex-direction: column; gap: 10px; }
.next-race-flag { font-size: 2rem; }
.next-race-name { font-size: 1.1rem; font-weight: 800; }
.next-race-date { font-size: 0.85rem; color: var(--text-muted); }
.next-race-circuit { font-size: 0.85rem; color: var(--text-muted); }
.next-race-countdown {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}
.nrc-unit { text-align: center; }
.nrc-unit .num { font-size: 1.4rem; font-weight: 900; color: var(--gold); line-height: 1; }
.nrc-unit .sep { font-size: 1.2rem; font-weight: 900; color: var(--primary); line-height: 1; padding: 0 2px; }
.nrc-unit .lbl { font-size: 0.6rem; color: var(--text-muted); }

/* ── 板块快捷入口 ────────────────────────── */
.quick-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
@media(max-width:900px){ .quick-grid { grid-template-columns: repeat(3, 1fr); } }
@media(max-width:480px){ .quick-grid { grid-template-columns: repeat(2, 1fr); } }

.quick-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.quick-item:hover {
  border-color: var(--primary);
  background: rgba(232,0,29,0.08);
  transform: translateY(-4px);
}
.quick-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--dark-3);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  transition: var(--transition);
}
.quick-item:hover .quick-icon { background: var(--primary); }
.quick-label { font-size: 0.82rem; font-weight: 600; color: var(--text-muted); }
.quick-item:hover .quick-label { color: var(--text); }

/* ── 资讯卡片 ─────────────────────────────── */
.news-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 20px;
}
@media(max-width:768px){ .news-grid { grid-template-columns: 1fr; } }

.news-featured { border-radius: var(--radius); overflow: hidden; position: relative; }
.news-featured-img {
  width: 100%; height: 300px;
  background: var(--dark-2);
  object-fit: cover;
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem;
  color: var(--text-muted);
}
@media(max-width:768px){ .news-featured-img { height: 200px; } }
.news-featured-body { padding: 20px; background: var(--card-bg); border: 1px solid var(--border); border-top: none; border-radius: 0 0 var(--radius) var(--radius); }
.news-featured-title { font-size: 1.2rem; font-weight: 800; margin: 8px 0 8px; line-height: 1.4; }
.news-featured-meta { font-size: 0.8rem; color: var(--text-muted); }

.news-list { display: flex; flex-direction: column; gap: 12px; }
.news-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  display: flex;
  gap: 14px;
  transition: var(--transition);
  cursor: pointer;
}
.news-item:hover { border-color: var(--primary); transform: translateX(4px); }
.news-item-img {
  width: 72px; height: 72px;
  border-radius: var(--radius-sm);
  background: var(--dark-3);
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  overflow: hidden;
}
.news-item-img img { width: 100%; height: 100%; object-fit: cover; }
.news-item-body { flex: 1; }
.news-item-title { font-size: 0.9rem; font-weight: 700; line-height: 1.4; margin-bottom: 6px; }
.news-item-meta { font-size: 0.75rem; color: var(--text-muted); }

/* ── 热门推荐 ─────────────────────────────── */
.recommend-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media(max-width:768px){ .recommend-grid { grid-template-columns: 1fr; } }

.recommend-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
}
.recommend-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow); }
.recommend-card-img {
  height: 180px;
  background: var(--dark-3);
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem;
  overflow: hidden;
  position: relative;
}
.recommend-card-img img { width: 100%; height: 100%; object-fit: cover; }
.recommend-card-type {
  position: absolute;
  top: 12px; left: 12px;
}
.recommend-card-body { padding: 16px; }
.recommend-card-title { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.recommend-card-desc { font-size: 0.82rem; color: var(--text-muted); line-height: 1.5; }

/* ── 积分榜页 ─────────────────────────────── */
.standings-header {
  background: linear-gradient(135deg, var(--dark-2) 0%, rgba(232,0,29,0.15) 100%);
  border-bottom: 1px solid var(--border);
  padding: 40px 0;
  margin-bottom: 0;
}
.standings-tabs { display: flex; gap: 4px; margin-bottom: 24px; }
.tab-btn {
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--dark-3);
  transition: var(--transition);
}
.tab-btn.active { background: var(--primary); color: #fff; }
.tab-btn:hover:not(.active) { color: var(--text); }

.filter-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 24px;
  align-items: center;
}
.filter-input {
  flex: 1;
  min-width: 200px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
}
.filter-input:focus { border-color: var(--primary); }
.filter-select {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
  cursor: pointer;
}

.standings-table-wrap { overflow-x: auto; }
.standings-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.standings-table th {
  background: var(--dark-3);
  padding: 12px 16px;
  text-align: left;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.standings-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.standings-table tr:hover td { background: rgba(255,255,255,0.03); }
.standings-table .pos-num {
  font-size: 1rem;
  font-weight: 900;
  width: 32px;
  text-align: center;
}
.standings-table .rider-cell {
  display: flex;
  align-items: center;
  gap: 12px;
}
.rider-num-tag {
  background: var(--dark-3);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 0.8rem;
  font-weight: 900;
  min-width: 36px;
  text-align: center;
}
.pts-cell { font-size: 1rem; font-weight: 800; color: var(--primary); }
.change-up { color: #1db954; font-weight: 700; }
.change-dn { color: var(--primary); font-weight: 700; }
.change-eq { color: var(--text-muted); }

/* ── 赛道百科 ─────────────────────────────── */
.circuits-filter {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.filter-tag {
  padding: 7px 18px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}
.filter-tag:hover, .filter-tag.active { border-color: var(--primary); color: var(--primary); background: rgba(232,0,29,0.08); }

.circuits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media(max-width:900px){ .circuits-grid { grid-template-columns: repeat(2, 1fr); } }
@media(max-width:540px){ .circuits-grid { grid-template-columns: 1fr; } }

.circuit-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
}
.circuit-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow); }
.circuit-card-map {
  height: 150px;
  background: var(--dark-3);
  display: flex; align-items: center; justify-content: center;
  font-size: 3.5rem;
  position: relative;
}
.circuit-card-body { padding: 16px; }
.circuit-card-name { font-size: 1rem; font-weight: 800; margin-bottom: 4px; }
.circuit-card-location { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 12px; }
.circuit-stats {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.circuit-stat { font-size: 0.78rem; }
.circuit-stat .v { font-weight: 700; color: var(--text); }
.circuit-stat .k { color: var(--text-muted); display: block; }

/* 赛道详情页 */
.circuit-detail-hero {
  height: 360px;
  background: var(--dark-2);
  display: flex; align-items: center; justify-content: center;
  font-size: 5rem;
  position: relative;
  overflow: hidden;
}
.circuit-detail-hero img { width: 100%; height: 100%; object-fit: cover; opacity: 0.5; }
.circuit-detail-hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(transparent 40%, rgba(0,0,0,0.9));
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 32px;
}

.detail-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
  margin-top: 32px;
}
@media(max-width:768px){ .detail-grid { grid-template-columns: 1fr; } }

.info-block {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}
.info-block h3 { font-size: 1rem; font-weight: 800; margin-bottom: 16px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.info-pairs { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media(max-width:480px){ .info-pairs { grid-template-columns: 1fr; } }
.info-pair .k { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 2px; }
.info-pair .v { font-size: 0.95rem; font-weight: 700; }

.weather-card {
  background: linear-gradient(135deg, #1e3a5f, #0d1f3c);
  border: 1px solid rgba(100,160,255,0.2);
  border-radius: var(--radius);
  padding: 24px;
}
.weather-main { display: flex; align-items: center; gap: 16px; margin-bottom: 16px; }
.weather-temp { font-size: 2.8rem; font-weight: 900; }
.weather-desc { font-size: 0.9rem; color: #ccc; }
.weather-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.weather-stat .k { font-size: 0.72rem; color: rgba(255,255,255,0.5); }
.weather-stat .v { font-size: 0.92rem; font-weight: 700; }

.track-3d-placeholder {
  height: 300px;
  background: var(--dark-3);
  border-radius: var(--radius);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px;
  color: var(--text-muted);
  border: 2px dashed var(--border);
  cursor: pointer;
  transition: var(--transition);
}
.track-3d-placeholder:hover { border-color: var(--primary); color: var(--primary); }
.track-3d-placeholder .icon { font-size: 3rem; }

/* ── 车手档案 ─────────────────────────────── */
.riders-tabs { display: flex; gap: 4px; margin-bottom: 24px; }
.riders-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
@media(max-width:900px){ .riders-grid { grid-template-columns: repeat(3, 1fr); } }
@media(max-width:640px){ .riders-grid { grid-template-columns: repeat(2, 1fr); } }
@media(max-width:380px){ .riders-grid { grid-template-columns: 1fr; } }

.rider-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}
.rider-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow); }
.rider-card-photo {
  height: 200px;
  background: linear-gradient(180deg, var(--dark-3) 0%, var(--dark-2) 100%);
  display: flex; align-items: center; justify-content: center;
  font-size: 4rem;
  position: relative;
  overflow: hidden;
}
.rider-card-photo img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.rider-card-num {
  position: absolute;
  top: 12px; right: 12px;
  background: var(--primary);
  color: #fff;
  font-size: 1.2rem;
  font-weight: 900;
  padding: 2px 10px;
  border-radius: 6px;
}
.rider-card-body { padding: 14px; }
.rider-card-name { font-size: 1rem; font-weight: 800; margin-bottom: 4px; }
.rider-card-team { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 8px; }
.rider-card-meta { display: flex; align-items: center; justify-content: space-between; }
.rider-card-flag { font-size: 1.2rem; }
.rider-card-pts { font-size: 0.85rem; font-weight: 700; color: var(--primary); }

/* 车手详情 */
.rider-hero {
  background: linear-gradient(135deg, var(--dark-2) 0%, rgba(232,0,29,0.2) 100%);
  padding: 60px 0;
  border-bottom: 1px solid var(--border);
}
.rider-hero-inner {
  display: flex;
  align-items: flex-end;
  gap: 40px;
}
@media(max-width:640px){ .rider-hero-inner { flex-direction: column; align-items: center; text-align: center; } }
.rider-big-num {
  font-size: 8rem;
  font-weight: 900;
  color: rgba(255,255,255,0.06);
  line-height: 1;
  position: absolute;
  right: 0; bottom: 0;
  pointer-events: none;
}
.rider-photo-big {
  width: 180px; height: 220px;
  border-radius: var(--radius);
  background: var(--dark-3);
  overflow: hidden;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 5rem;
}
.rider-photo-big img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.rider-info-main h1 { font-size: 2.4rem; font-weight: 900; line-height: 1.1; margin-bottom: 8px; }
@media(max-width:640px){ .rider-info-main h1 { font-size: 1.8rem; } }
.rider-stat-pills { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.rider-stat-pill {
  background: var(--dark-3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 16px;
  text-align: center;
}
.rider-stat-pill .v { font-size: 1.4rem; font-weight: 900; color: var(--gold); line-height: 1; }
.rider-stat-pill .k { font-size: 0.62rem; color: var(--text-muted); }

/* ── 赛事回顾 ─────────────────────────────── */
.review-timeline { position: relative; padding-left: 32px; }
.review-timeline::before {
  content: '';
  position: absolute;
  left: 10px; top: 0; bottom: 0;
  width: 2px;
  background: var(--border);
}
.review-item {
  position: relative;
  margin-bottom: 28px;
}
.review-item::before {
  content: '';
  position: absolute;
  left: -26px; top: 8px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--primary);
  border: 2px solid var(--dark);
}
.review-item-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  cursor: pointer;
  transition: var(--transition);
}
.review-item-card:hover { border-color: var(--primary); }

/* ── 数据中心 ─────────────────────────────── */
.stat-leaderboard {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat-leaderboard-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  font-weight: 700;
  font-size: 0.9rem;
}
.stat-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.stat-row:last-child { border-bottom: none; }
.stat-row:hover { background: rgba(255,255,255,0.03); }
.stat-pos { width: 24px; font-size: 0.82rem; font-weight: 700; color: var(--text-muted); }
.stat-bar-wrap { flex: 1; height: 6px; background: var(--dark-3); border-radius: 3px; overflow: hidden; }
.stat-bar { height: 100%; background: var(--primary); border-radius: 3px; transition: width 0.8s cubic-bezier(.4,0,.2,1); }
.stat-val { font-size: 0.9rem; font-weight: 700; min-width: 40px; text-align: right; }

/* ── 社区 ─────────────────────────────── */
.community-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
}
@media(max-width:768px){ .community-grid { grid-template-columns: 1fr; } }

.post-editor {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
}
.post-editor textarea {
  width: 100%;
  background: var(--dark-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  color: var(--text);
  font-size: 0.9rem;
  resize: none;
  outline: none;
  min-height: 80px;
  transition: var(--transition);
}
.post-editor textarea:focus { border-color: var(--primary); }
.post-editor-footer { display: flex; justify-content: flex-end; margin-top: 12px; gap: 8px; align-items: center; }

.post-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
  transition: var(--transition);
}
.post-card:hover { border-color: rgba(232,0,29,0.3); }
.post-header { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.post-avatar {
  width: 38px; height: 38px; border-radius: 50%;
  background: var(--dark-3);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; font-weight: 700;
  flex-shrink: 0;
}
.post-username { font-size: 0.9rem; font-weight: 700; }
.post-time { font-size: 0.75rem; color: var(--text-muted); }
.post-content { font-size: 0.9rem; line-height: 1.7; margin-bottom: 14px; }
.post-actions { display: flex; gap: 16px; }
.post-action-btn {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.82rem; color: var(--text-muted);
  cursor: pointer; transition: var(--transition);
}
.post-action-btn:hover { color: var(--primary); }

.prediction-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}
.prediction-title { font-size: 0.95rem; font-weight: 700; margin-bottom: 14px; }
.prediction-options { display: flex; flex-direction: column; gap: 8px; }
.prediction-option {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--dark-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.prediction-option:hover { border-color: var(--primary); }
.prediction-option.voted { border-color: var(--primary); }
.prediction-bar {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  background: rgba(232,0,29,0.12);
  transition: width 0.5s;
}
.prediction-pct { margin-left: auto; font-size: 0.82rem; font-weight: 700; color: var(--primary); }

/* ── 赛事日历 ─────────────────────────────── */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
@media(max-width:900px){ .calendar-grid { grid-template-columns: repeat(2, 1fr); } }
@media(max-width:540px){ .calendar-grid { grid-template-columns: 1fr; } }

.calendar-event {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: var(--transition);
  cursor: pointer;
}
.calendar-event:hover { border-color: var(--primary); transform: translateY(-3px); }
.calendar-event.past { opacity: 0.5; }
.calendar-event.current { border-color: var(--gold); box-shadow: 0 0 20px rgba(245,197,24,0.2); }
.cal-date {
  text-align: center;
  flex-shrink: 0;
  background: var(--dark-3);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
}
.cal-date .day { font-size: 1.8rem; font-weight: 900; line-height: 1; color: var(--primary); }
.cal-date .month { font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; }
.cal-info { flex: 1; }
.cal-flag { font-size: 1.4rem; margin-bottom: 4px; }
.cal-name { font-size: 0.95rem; font-weight: 800; margin-bottom: 4px; }
.cal-circuit { font-size: 0.8rem; color: var(--text-muted); }
.cal-bell {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--dark-3);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem;
  transition: var(--transition);
  flex-shrink: 0;
  align-self: center;
}
.cal-bell:hover { background: var(--gold); color: #000; }

/* ── 页脚 ─────────────────────────────── */
footer {
  background: var(--dark-2);
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
  margin-top: 60px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}
@media(max-width:768px){ .footer-grid { grid-template-columns: 1fr 1fr; } }
@media(max-width:480px){ .footer-grid { grid-template-columns: 1fr; } }
.footer-brand p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.7; margin-top: 12px; }
.footer-col h4 { font-size: 0.85rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 14px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 0.85rem; color: var(--text-muted); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--primary); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 8px;
}

/* ── 通用动画 ─────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeInUp 0.5s ease both; }

/* ── 页面间隐藏 ─────────────────────────────── */
.page { display: none; }
.page.active { display: block; }

/* ── 内容上传管理区（管理员可见） ─────────── */
.admin-bar {
  background: linear-gradient(90deg, var(--primary), var(--primary-dk));
  padding: 10px 0;
  font-size: 0.82rem;
  text-align: center;
  display: none; /* 管理模式下显示 */
}
.admin-bar.visible { display: block; }
.upload-modal {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.8);
  z-index: 3000;
  align-items: center;
  justify-content: center;
}
.upload-modal.open { display: flex; }
.upload-box {
  background: var(--dark-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  width: 100%;
  max-width: 500px;
  margin: 20px;
}
.upload-box h3 { font-size: 1.2rem; font-weight: 800; margin-bottom: 20px; }
.upload-field { margin-bottom: 16px; }
.upload-field label { display: block; font-size: 0.82rem; color: var(--text-muted); margin-bottom: 6px; }
.upload-field input,
.upload-field textarea,
.upload-field select {
  width: 100%;
  background: var(--dark-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}
.upload-field input:focus,
.upload-field textarea:focus,
.upload-field select:focus { border-color: var(--primary); }
.upload-field textarea { resize: vertical; min-height: 80px; }
.upload-dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-muted);
}
.upload-dropzone:hover { border-color: var(--primary); color: var(--primary); background: rgba(232,0,29,0.05); }
.upload-footer { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

/* ── Utility ─────────────────────────────── */
.text-muted { color: var(--text-muted); }
.text-red { color: var(--primary); }
.text-gold { color: var(--gold); }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-8 { gap: 8px; }
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }