/* ===== 每日大赛健身打卡挑战 - 主样式表 ===== */
:root {
  --primary: #22C55E;
  --secondary: #111827;
  --bg: #050A08;
  --card: #14201A;
  --accent: #F97316;
  --text: #E5E7EB;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0,0,0,0.12);
  --primary-light: #4ADE80;
  --primary-dark: #16A34A;
  --border: #1F3D2A;
  --font-title: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Courier New", monospace;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.8;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--primary-light);
  text-decoration: underline;
}

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

ul, ol {
  list-style: none;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  font-weight: 900;
  line-height: 1.3;
  color: #ffffff;
}

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;
  color: var(--text);
}

.mono-number {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 2rem;
  color: var(--primary);
}

/* ===== Layout ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4rem 0;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--primary);
  margin: 1rem auto 0;
  border-radius: 2px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

/* ===== Header & Navigation ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(5, 10, 8, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0.8rem 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.3rem;
  font-weight: 900;
  color: #fff;
}

.site-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.nav-menu {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.nav-menu a {
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.4rem 0;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  text-decoration: none;
}

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

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--bg) 0%, #0A1F12 50%, var(--bg) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(34,197,94,0.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-text h1 {
  font-size: 3rem;
  background: linear-gradient(135deg, #fff 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.5rem;
}

.hero-text .subtitle {
  font-size: 1.2rem;
  color: var(--text);
  margin-bottom: 2rem;
  opacity: 0.9;
}

.hero-dashboard {
  background: var(--card);
  border-radius: var(--radius);
  padding: 2rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

/* ===== Goal Ring ===== */
.goal-ring-container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 1.5rem 0;
}

.goal-ring {
  position: relative;
  width: 200px;
  height: 200px;
}

.goal-ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.goal-ring circle {
  fill: none;
  stroke-width: 12;
  stroke-linecap: round;
}

.ring-bg {
  stroke: rgba(255,255,255,0.1);
}

.ring-duration {
  stroke: var(--primary);
  stroke-dasharray: 502;
  stroke-dashoffset: 150;
  animation: ring-fill 2s ease-out forwards;
}

.ring-count {
  stroke: var(--accent);
  stroke-dasharray: 440;
  stroke-dashoffset: 176;
  animation: ring-fill 2s ease-out 0.3s forwards;
}

.ring-complete {
  stroke: #8B5CF6;
  stroke-dasharray: 377;
  stroke-dashoffset: 94;
  animation: ring-fill 2s ease-out 0.6s forwards;
}

@keyframes ring-fill {
  from { stroke-dashoffset: 502; }
}

.ring-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.ring-center .percent {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--primary);
}

.ring-center .label {
  font-size: 0.8rem;
  color: var(--text);
  opacity: 0.7;
}

/* ===== Heatmap ===== */
.heatmap {
  background: var(--card);
  border-radius: var(--radius);
  padding: 2rem;
  border: 1px solid var(--border);
}

.heatmap-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}

.heatmap-cell {
  aspect-ratio: 1;
  border-radius: 3px;
  background: rgba(34, 197, 94, 0.1);
  transition: var(--transition);
}

.heatmap-cell.level-1 { background: rgba(34, 197, 94, 0.25); }
.heatmap-cell.level-2 { background: rgba(34, 197, 94, 0.45); }
.heatmap-cell.level-3 { background: rgba(34, 197, 94, 0.65); }
.heatmap-cell.level-4 { background: rgba(34, 197, 94, 0.85); }

.heatmap-cell:hover {
  transform: scale(1.3);
  box-shadow: 0 0 8px var(--primary);
}

/* ===== Timer ===== */
.timer-display {
  text-align: center;
  padding: 2rem;
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.timer-digits {
  font-family: var(--font-mono);
  font-size: 4rem;
  font-weight: 900;
  color: var(--primary);
  letter-spacing: 4px;
  text-shadow: 0 0 20px rgba(34, 197, 94, 0.3);
}

.timer-controls {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 1.5rem;
}

/* ===== Cards ===== */
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.5rem;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.2);
  border-color: var(--primary);
}

.card-image {
  border-radius: calc(var(--radius) - 4px);
  overflow: hidden;
  margin-bottom: 1rem;
}

.card-image img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  transition: var(--transition);
}

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

.card-tag {
  display: inline-block;
  padding: 0.2rem 0.8rem;
  background: rgba(34, 197, 94, 0.15);
  color: var(--primary);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

/* ===== Leaderboard ===== */
.leaderboard {
  background: var(--card);
  border-radius: var(--radius);
  padding: 2rem;
  border: 1px solid var(--border);
}

.leaderboard-item {
  display: flex;
  align-items: center;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  gap: 1rem;
}

.leaderboard-item:last-child {
  border-bottom: none;
}

.rank-number {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 900;
  width: 40px;
  text-align: center;
}

.rank-1 .rank-number { color: #FFD700; }
.rank-2 .rank-number { color: #C0C0C0; }
.rank-3 .rank-number { color: #CD7F32; }

.leaderboard-info {
  flex: 1;
}

.leaderboard-info .name {
  font-weight: 700;
  color: #fff;
}

.leaderboard-info .streak {
  font-size: 0.8rem;
  color: var(--text);
  opacity: 0.7;
}

.leaderboard-score {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
}

/* ===== Badges ===== */
.badge-grid {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.badge-item {
  text-align: center;
  padding: 1.5rem;
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  min-width: 140px;
  transition: var(--transition);
}

.badge-item:hover {
  border-color: var(--primary);
  box-shadow: 0 0 20px rgba(34, 197, 94, 0.2);
}

.badge-icon {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.badge-label {
  font-size: 0.85rem;
  color: var(--text);
}

.badge-days {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--primary);
  font-weight: 700;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: #000;
}

.btn-primary:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(34, 197, 94, 0.3);
  color: #000;
  text-decoration: none;
}

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

.btn-outline:hover {
  background: var(--primary);
  color: #000;
  text-decoration: none;
}

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

.btn-accent:hover {
  background: #FB923C;
  transform: translateY(-2px);
  text-decoration: none;
}

/* ===== Streak Counter ===== */
.streak-counter {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.5rem;
  border: 1px solid var(--border);
}

.streak-number {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 900;
  color: var(--accent);
}

.streak-label {
  font-size: 0.9rem;
  color: var(--text);
}

/* ===== Task Card ===== */
.task-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 1.5rem;
  border: 1px solid var(--border);
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  transition: var(--transition);
}

.task-card:hover {
  border-color: var(--primary);
}

.task-icon {
  width: 48px;
  height: 48px;
  background: rgba(34, 197, 94, 0.15);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.task-meta {
  display: flex;
  gap: 1rem;
  margin-top: 0.5rem;
  font-size: 0.8rem;
  color: var(--text);
  opacity: 0.7;
}

.task-difficulty {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 600;
}

.difficulty-easy { background: rgba(34,197,94,0.2); color: var(--primary); }
.difficulty-medium { background: rgba(249,115,22,0.2); color: var(--accent); }
.difficulty-hard { background: rgba(239,68,68,0.2); color: #EF4444; }

/* ===== Health Tip ===== */
.health-tip {
  background: linear-gradient(135deg, rgba(34,197,94,0.1) 0%, rgba(249,115,22,0.05) 100%);
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1rem 0;
}

.health-tip .tip-title {
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

/* ===== FAQ ===== */
.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1rem;
  overflow: hidden;
}

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

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

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

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

.faq-answer {
  padding: 0 1.5rem;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  padding: 0 1.5rem 1.5rem;
  max-height: 500px;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: 1rem 0;
  font-size: 0.85rem;
}

.breadcrumb a {
  color: var(--text);
  opacity: 0.7;
}

.breadcrumb a:hover {
  color: var(--primary);
  opacity: 1;
}

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

.breadcrumb .separator {
  margin: 0 0.5rem;
  color: var(--text);
  opacity: 0.4;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--secondary);
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--border);
}

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

.footer-brand h3 {
  color: var(--primary);
  margin-bottom: 1rem;
}

.footer-brand p {
  font-size: 0.9rem;
  opacity: 0.8;
}

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

.footer-links a {
  display: block;
  color: var(--text);
  opacity: 0.7;
  padding: 0.3rem 0;
  font-size: 0.85rem;
}

.footer-links a:hover {
  color: var(--primary);
  opacity: 1;
  text-decoration: none;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  opacity: 0.6;
}

/* ===== Page Header ===== */
.page-header {
  padding: 3rem 0;
  background: linear-gradient(135deg, var(--bg) 0%, #0A1F12 100%);
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}

.page-header .page-desc {
  color: var(--text);
  opacity: 0.8;
  max-width: 600px;
}

/* ===== Search ===== */
.search-box {
  position: relative;
  max-width: 600px;
  margin: 2rem auto;
}

.search-box input {
  width: 100%;
  padding: 1rem 1.5rem;
  padding-right: 3.5rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 50px;
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: var(--transition);
}

.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 15px rgba(34, 197, 94, 0.2);
}

.search-box button {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--primary);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  cursor: pointer;
  color: #000;
  font-size: 1.1rem;
  transition: var(--transition);
}

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

.search-result-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: var(--transition);
}

.search-result-item:hover {
  border-color: var(--primary);
}

.search-result-item h3 a {
  color: #fff;
}

.search-result-item .result-path {
  font-size: 0.8rem;
  color: var(--primary);
  margin-top: 0.3rem;
}

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

.error-code {
  font-family: var(--font-mono);
  font-size: 8rem;
  font-weight: 900;
  color: var(--primary);
  opacity: 0.3;
  line-height: 1;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  h1 { font-size: 1.8rem; }
  h2 { font-size: 1.5rem; }
  
  .hero { min-height: auto; padding: 3rem 0; }
  .hero-content { grid-template-columns: 1fr; gap: 2rem; }
  .hero-text h1 { font-size: 2rem; }
  
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  
  .footer-grid { grid-template-columns: 1fr 1fr; }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--border);
  }
  
  .nav-menu.active { display: flex; }
  
  .mobile-toggle { display: flex; }
  
  .timer-digits { font-size: 2.5rem; }
  
  .streak-number { font-size: 2rem; }
  
  .section { padding: 2.5rem 0; }
  
  .badge-grid { gap: 0.8rem; }
  .badge-item { min-width: 100px; padding: 1rem; }
}

@media (max-width: 480px) {
  .container { padding: 0 1rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .heatmap-grid { gap: 2px; }
}

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

@keyframes countUp {
  from { opacity: 0; transform: scale(0.5); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes timerPulse {
  0%, 100% { text-shadow: 0 0 20px rgba(34, 197, 94, 0.3); }
  50% { text-shadow: 0 0 40px rgba(34, 197, 94, 0.6); }
}

.animate-in {
  animation: fadeInUp 0.6s ease-out forwards;
}

.timer-active .timer-digits {
  animation: timerPulse 1s ease-in-out infinite;
}

/* ===== Utility ===== */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.flex-center { display: flex; align-items: center; justify-content: center; }