/* ============================================
   mrds每日大赛 · 燃情赛事视觉系统
   风格：活力杂志 / 暖调奶油 × 火焰橙 × 藏蓝
   ============================================ */

:root {
  --primary: #FF4D2E;
  --primary-dark: #E63C1F;
  --secondary: #1D2B4A;
  --accent: #FFB627;
  --bg: #FFF9F0;
  --bg-alt: #FFEDE0;
  --white: #FFFFFF;
}

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

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background-color: var(--bg);
  color: var(--secondary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ══════════════════ 布局容器 ══════════════════ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

.section:nth-child(even) {
  background: linear-gradient(180deg, var(--bg-alt), var(--bg));
}

/* ══════════════════ 导航 ══════════════════ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 249, 240, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 77, 46, 0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--secondary);
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: var(--white);
  box-shadow: 0 4px 12px rgba(255, 77, 46, 0.35);
  transform: rotate(-6deg);
  transition: transform 0.3s ease;
}

.logo:hover .logo-icon {
  transform: rotate(6deg) scale(1.05);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--secondary);
  position: relative;
  padding: 4px 2px;
  transition: color 0.25s ease;
}

.main-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 0.3s ease;
}

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

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

.nav-cta {
  padding: 10px 24px !important;
  border-radius: 100px !important;
  color: var(--white) !important;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  box-shadow: 0 4px 14px rgba(255, 77, 46, 0.3);
  transition: transform 0.25s ease, box-shadow 0.25s ease !important;
}

.nav-cta::after {
  display: none !important;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 77, 46, 0.45);
  color: var(--white) !important;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.6rem;
  cursor: pointer;
  color: var(--secondary);
  line-height: 1;
  padding: 4px 8px;
}

/* ══════════════════ Hero ══════════════════ */
.hero {
  min-height: 88vh;
  display: flex;
  align-items: center;
  gap: 40px;
  padding-top: 120px;
  padding-bottom: 64px;
  position: relative;
  background:
    radial-gradient(circle at 88% 18%, rgba(255, 182, 39, 0.18), transparent 38%),
    radial-gradient(circle at 15% 70%, rgba(255, 77, 46, 0.1), transparent 42%);
}

.hero::before {
  content: '';
  position: absolute;
  top: 80px;
  right: -80px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 2px dashed rgba(255, 77, 46, 0.18);
  pointer-events: none;
}

.hero-content {
  max-width: 620px;
  flex: 1;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 8px 20px;
  border-radius: 100px;
  margin-bottom: 20px;
  background: var(--accent);
  color: var(--secondary);
  box-shadow: 0 4px 14px rgba(255, 182, 39, 0.3);
  letter-spacing: 0.02em;
}

.hero-eyebrow::before {
  content: '🔥';
  font-size: 0.9rem;
}

.hero h1 {
  font-size: 3.2rem;
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  color: var(--secondary);
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.68;
  max-width: 520px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-image {
  flex: 1;
  max-width: 440px;
  border-radius: 24px;
  overflow: hidden;
  position: relative;
  box-shadow: 0 20px 48px rgba(29, 43, 74, 0.12);
  transform: rotate(2deg);
}

.hero-image::before {
  content: '';
  position: absolute;
  top: -18px;
  right: -18px;
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: conic-gradient(from 180deg, var(--primary), var(--accent), var(--primary));
  z-index: 2;
  box-shadow: 0 4px 18px rgba(255, 77, 46, 0.35);
}

.hero-image::after {
  content: '';
  position: absolute;
  bottom: -20px;
  left: -20px;
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: var(--secondary);
  z-index: 2;
  transform: rotate(18deg);
}

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

/* ══════════════════ 按钮 ══════════════════ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 100px;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: var(--white);
  box-shadow: 0 6px 20px rgba(255, 77, 46, 0.35);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(255, 77, 46, 0.45);
}

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

.btn-outline:hover {
  background: var(--secondary);
  color: var(--bg);
  transform: translateY(-3px);
}

/* ══════════════════ 标签 / 标题 ══════════════════ */
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 12px;
  color: var(--primary);
  background: rgba(255, 77, 46, 0.08);
  padding: 6px 16px;
  border-radius: 100px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 900;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--secondary);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 56px;
  height: 4px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  margin-top: 10px;
}

.text-center .section-title::after {
  margin-left: auto;
  margin-right: auto;
}

.section-desc {
  max-width: 600px;
  opacity: 0.65;
  margin-bottom: 44px;
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ══════════════════ 卡片网格 ══════════════════ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.category-card {
  border-radius: 18px;
  padding: 32px 28px;
  background: var(--white);
  border: 1px solid rgba(29, 43, 74, 0.06);
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 4px 12px rgba(29, 43, 74, 0.04);
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.category-card:nth-child(2)::before {
  background: linear-gradient(90deg, var(--secondary), #4A6FA5);
}

.category-card:nth-child(3)::before {
  background: linear-gradient(90deg, var(--accent), var(--primary));
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(29, 43, 74, 0.1);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.4rem;
  background: linear-gradient(135deg, rgba(255, 77, 46, 0.12), rgba(255, 182, 39, 0.12));
  color: var(--primary);
  transition: transform 0.4s ease;
}

.category-card:hover .card-icon {
  transform: rotate(-8deg) scale(1.08);
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 8px;
  transition: gap 0.25s ease;
}

.card-link:hover {
  gap: 10px;
}

/* ══════════════════ 特性块 ══════════════════ */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-image {
  border-radius: 24px;
  overflow: hidden;
  position: relative;
  box-shadow: 0 16px 40px rgba(29, 43, 74, 0.1);
}

.feature-image::after {
  content: '';
  position: absolute;
  top: 16px;
  left: 16px;
  width: 100%;
  height: 100%;
  border: 2px dashed var(--accent);
  border-radius: 24px;
  z-index: -1;
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.5s ease;
}

.feature-image:hover img {
  transform: scale(1.03);
}

.feature-text {
  padding: 8px 0;
}

.feature-text h3 {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 12px;
}

.feature-list {
  list-style: none;
  margin-top: 16px;
}

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 500;
  border-bottom: 1px dashed rgba(29, 43, 74, 0.08);
}

.feature-list li:last-child {
  border-bottom: none;
}

.feature-list li::before {
  content: '🏆';
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}

/* ══════════════════ 数据条 ══════════════════ */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
  background: linear-gradient(135deg, var(--primary) 0%, #FF7A45 50%, var(--accent) 100%);
  border-radius: 28px;
  padding: 52px 40px;
  box-shadow: 0 16px 48px rgba(255, 77, 46, 0.3);
  position: relative;
  overflow: hidden;
}

.stats-bar::before {
  content: '';
  position: absolute;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  top: -60px;
  right: -50px;
}

.stats-bar::after {
  content: '';
  position: absolute;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  bottom: -30px;
  left: 30px;
}

.stat-item {
  background: rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  padding: 28px 16px;
  transition: transform 0.3s ease, background 0.3s ease;
}

.stat-item:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.24);
}

.stat-number {
  font-size: 2.4rem;
  font-weight: 900;
  line-height: 1.1;
  color: var(--white);
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 0.88rem;
  opacity: 0.85;
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
}

/* ══════════════════ 内容墙 ══════════════════ */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: 18px;
  overflow: hidden;
  background: var(--white);
  border: 1px solid rgba(29, 43, 74, 0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 4px 14px rgba(29, 43, 74, 0.04);
}

.content-wall-item:hover {
  transform: translateY(-6px);
  box-shadow: 0 14px 36px rgba(29, 43, 74, 0.12);
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.content-wall-item:hover img {
  transform: scale(1.04);
}

.content-wall-body {
  padding: 24px;
}

.content-wall-body h4 {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.content-wall-body p {
  font-size: 0.85rem;
  opacity: 0.6;
  line-height: 1.5;
}

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

.faq-item {
  border: 1px solid rgba(29, 43, 74, 0.08);
  border-radius: 14px;
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  background: var(--white);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.faq-item:hover {
  border-color: rgba(255, 77, 46, 0.3);
}

.faq-item .faq-question {
  padding: 18px 22px;
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: var(--secondary);
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--primary);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

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

.faq-item .faq-answer {
  padding: 0 22px 18px;
  display: none;
  opacity: 0.68;
  font-size: 0.9rem;
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  display: block;
}

/* ══════════════════ CTA横幅 ══════════════════ */
.cta-banner {
  padding: 64px 40px;
  text-align: center;
  border-radius: 28px;
  background: linear-gradient(135deg, var(--primary), #FF7A3D);
  color: var(--white);
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 52px rgba(255, 77, 46, 0.32);
}

.cta-banner::before {
  content: '';
  position: absolute;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 32px solid rgba(255, 255, 255, 0.08);
  top: -100px;
  left: -80px;
}

.cta-banner::after {
  content: '';
  position: absolute;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  bottom: -40px;
  right: 60px;
}

.cta-banner h2 {
  color: var(--white);
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  position: relative;
  z-index: 1;
  opacity: 0.85;
  margin-bottom: 28px;
}

.cta-banner .btn-primary {
  background: var(--white);
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
}

/* ══════════════════ 页脚 ══════════════════ */
.site-footer {
  padding: 72px 0 32px;
  background: var(--bg);
  border-top: 1px solid rgba(255, 77, 46, 0.12);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
}

.site-footer .container {
  max-width: 1200px;
}

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

.footer-brand {
  padding-right: 32px;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  opacity: 0.6;
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h5 {
  font-size: 0.9rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer-col a {
  display: block;
  font-size: 0.85rem;
  color: var(--secondary);
  opacity: 0.55;
  text-decoration: none;
  padding: 4px 0;
  transition: opacity 0.2s ease, color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(29, 43, 74, 0.08);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.82rem;
  opacity: 0.5;
}

/* ══════════════════ 工具类 ══════════════════ */
.text-accent {
  color: var(--primary);
  font-style: italic;
  font-weight: 900;
  position: relative;
  display: inline-block;
}

.text-accent::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 4px;
  height: 10px;
  background: rgba(255, 182, 39, 0.35);
  z-index: -1;
  border-radius: 4px;
}

.text-center {
  text-align: center;
}

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.65;
  line-height: 1.7;
}

.mt-0 {
  margin-top: 0;
}

.mb-0 {
  margin-bottom: 0;
}

/* ══════════════════ 响应式 ══════════════════ */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 2.6rem;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 64px;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    width: 100%;
    background: rgba(255, 249, 240, 0.98);
    backdrop-filter: blur(20px);
    box-shadow: 0 16px 32px rgba(29, 43, 74, 0.08);
    padding: 24px;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    border-bottom: 1px solid rgba(255, 77, 46, 0.12);
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    font-size: 1rem;
    padding: 8px 0;
    width: 100%;
  }

  .nav-cta {
    margin-top: 8px;
    text-align: center;
    width: 100%;
    padding: 14px 24px !important;
  }

  .menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .hero {
    flex-direction: column;
    gap: 40px;
    padding-top: 120px;
    padding-bottom: 48px;
    min-height: auto;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero-image {
    max-width: 100%;
    width: 100%;
  }

  .hero-buttons {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .feature-image {
    order: 1;
  }

  .feature-text {
    order: 2;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    padding: 36px 24px;
    gap: 16px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .section {
    padding: 64px 0;
  }

  .section-title {
    font-size: 1.8rem;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.9rem;
  }

  .hero p {
    font-size: 0.95rem;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .cta-banner {
    padding: 48px 24px;
  }

  .cta-banner h2 {
    font-size: 1.5rem;
  }

  .section {
    padding: 48px 0;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.88rem;
  }
}