/* ============================================
   kaiyun体育在线 — 暖日竞技场 设计系统
   配色：陶土珊瑚 × 鼠尾草绿 × 奶油暖白
   ============================================ */

:root {
  --color-primary: #e07b55;
  --color-primary-dark: #c96a45;
  --color-primary-light: #f5d5c4;
  --color-accent: #5c8a6f;
  --color-accent-light: #dce8e0;
  --color-bg: #faf7f2;
  --color-bg-alt: #f4efe7;
  --color-bg-warm: #fefcf8;
  --color-text: #3b2d28;
  --color-text-soft: #6b5d56;
  --color-text-muted: #9b8c84;
  --color-border: #e8e1d8;
  --color-border-light: #f0ebe3;
  --color-white: #ffffff;
  --color-amber: #d4a06a;
  --color-amber-light: #fdf3e6;
  --shadow-sm: 0 2px 8px rgba(60, 40, 30, 0.06);
  --shadow-md: 0 6px 24px rgba(60, 40, 30, 0.10);
  --shadow-lg: 0 12px 40px rgba(60, 40, 30, 0.14);
  --shadow-warm: 0 4px 20px rgba(180, 100, 60, 0.12);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

/* ============ 核心布局 ============ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
}

.section {
  padding: 88px 0;
  position: relative;
}

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

.section:nth-child(odd) {
  background: var(--color-bg-warm);
}

/* ============ 导航 ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(254, 252, 248, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border-light);
  transition: var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--color-text);
  letter-spacing: -0.3px;
  transition: var(--transition);
}

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

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-amber));
  color: #fff;
  font-weight: 900;
  box-shadow: 0 3px 10px rgba(224, 123, 85, 0.3);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 550;
  color: var(--color-text-soft);
  transition: var(--transition);
  position: relative;
  padding: 4px 0;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: var(--transition);
}

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

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

.nav-cta {
  padding: 10px 22px !important;
  border-radius: 25px !important;
  color: #fff !important;
  font-weight: 700 !important;
  background: linear-gradient(135deg, var(--color-primary), #d46945);
  box-shadow: 0 4px 14px rgba(224, 123, 85, 0.35);
  transition: var(--transition);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(224, 123, 85, 0.45);
}

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

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background: none;
  border: none;
  padding: 6px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2.5px;
  background: var(--color-text);
  border-radius: 3px;
  transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============ Hero ============ */
.hero {
  min-height: 78vh;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding-top: 90px;
  background: linear-gradient(180deg, #fefcf8 0%, #faf6f0 40%, #f7f1e8 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -180px;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(224,123,85,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -60px;
  left: -80px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(92,138,111,0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  max-width: 680px;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 22px;
  margin-bottom: 20px;
  background: var(--color-amber-light);
  color: var(--color-amber);
  letter-spacing: 1.5px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: 3.4rem;
  line-height: 1.15;
  margin-bottom: 22px;
  font-weight: 900;
  letter-spacing: -1px;
  color: var(--color-text);
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--color-primary), #d48050);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.75;
  max-width: 520px;
  margin-bottom: 36px;
  color: var(--color-text-soft);
  line-height: 1.7;
  font-weight: 450;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  position: relative;
  z-index: 1;
  min-height: 380px;
  background: linear-gradient(160deg, #fae8dc 0%, #f5d8c4 30%, #eed9c8 60%, #e8d5c2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  min-height: 380px;
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 30px;
  border-radius: 28px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: var(--transition);
  font-size: 0.95rem;
  letter-spacing: 0.2px;
  white-space: nowrap;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--color-primary), #d06840);
  box-shadow: 0 4px 16px rgba(224, 123, 85, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(224, 123, 85, 0.5);
}

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

.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.05rem;
  border-radius: 32px;
}

/* ============ 标签/标题 ============ */
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 2.5px;
  margin-bottom: 14px;
  color: var(--color-primary);
  text-transform: uppercase;
}

.section-title {
  font-size: 2.4rem;
  margin-bottom: 16px;
  font-weight: 850;
  letter-spacing: -0.6px;
  color: var(--color-text);
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-amber));
  border-radius: 3px;
  margin-top: 12px;
}

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

.section-desc {
  max-width: 600px;
  opacity: 0.7;
  margin-bottom: 44px;
  color: var(--color-text-soft);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* ============ 卡片网格 ============ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 26px;
}

.category-card {
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  border: 1.5px solid var(--color-border-light);
  transition: var(--transition);
  background: var(--color-white);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-amber));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.category-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.category-card:hover::before {
  transform: scaleX(1);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: var(--color-amber-light);
  color: var(--color-primary);
  transition: var(--transition);
}

.category-card:hover .card-icon {
  background: var(--color-primary);
  color: #fff;
  transform: scale(1.05);
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
  margin-top: 8px;
}

.card-link:hover {
  gap: 10px;
  color: var(--color-primary-dark);
}

/* ============ 特性块 ============ */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.feature-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  min-height: 360px;
  background: linear-gradient(160deg, #e8f0eb 0%, #dce8e0 40%, #d5e3da 100%);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  min-height: 360px;
}

.feature-text {
  position: relative;
}

.feature-list {
  list-style: none;
  margin-top: 20px;
}

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 1rem;
  color: var(--color-text-soft);
  line-height: 1.5;
}

.feature-list li::before {
  content: '✓';
  font-weight: 800;
  color: var(--color-accent);
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-top: 1px;
  background: var(--color-accent-light);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
}

/* ============ 数据条 ============ */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  text-align: center;
}

.stat-item {
  padding: 30px 20px;
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--color-border-light);
  background: var(--color-white);
  transition: var(--transition);
  position: relative;
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-warm);
  border-color: transparent;
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--color-primary);
  letter-spacing: -1px;
  line-height: 1;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.65;
  margin-top: 8px;
  color: var(--color-text-soft);
  font-weight: 500;
}

/* ============ 内容墙 ============ */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 26px;
}

.content-wall-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1.5px solid var(--color-border-light);
  transition: var(--transition);
  background: var(--color-white);
}

.content-wall-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.content-wall-item img {
  width: 100%;
  height: 210px;
  object-fit: cover;
  display: block;
}

.content-wall-body {
  padding: 22px 20px;
}

.content-wall-body h3 {
  font-weight: 750;
  font-size: 1.1rem;
  margin-bottom: 6px;
  color: var(--color-text);
}

.content-wall-body p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ============ FAQ ============ */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  border: 1.5px solid var(--color-border-light);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  background: var(--color-white);
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--color-border);
}

.faq-item .faq-question {
  padding: 18px 22px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
  color: var(--color-text);
  user-select: none;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--color-primary);
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 12px;
}

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

.faq-item .faq-answer {
  padding: 0 22px 18px;
  display: none;
  opacity: 0.7;
  color: var(--color-text-soft);
  line-height: 1.7;
  font-size: 0.95rem;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeInDown 0.3s ease;
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 0.7;
    transform: translateY(0);
  }
}

/* ============ CTA横幅 ============ */
.cta-banner {
  padding: 60px 32px;
  text-align: center;
  border-radius: var(--radius-xl);
  color: #fff;
  background: linear-gradient(150deg, #e07b55 0%, #d06840 30%, #c95a35 60%, #d48050 100%);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -120px;
  width: 350px;
  height: 350px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  pointer-events: none;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -60px;
  left: -80px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  pointer-events: none;
}

.cta-banner h2 {
  color: #fff;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--color-primary);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  background: #fefcf8;
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.2);
}

/* ============ 页脚 ============ */
.site-footer {
  padding: 60px 0 30px;
  background: #f5f0e8;
  color: var(--color-text-soft);
  border-top: 1px solid var(--color-border-light);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 44px;
}

.footer-brand .logo {
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.9rem;
  opacity: 0.7;
  line-height: 1.6;
  margin-top: 8px;
}

.footer-col h4 {
  font-weight: 750;
  font-size: 0.95rem;
  margin-bottom: 16px;
  color: var(--color-text);
  letter-spacing: 0.3px;
}

.footer-col a {
  display: block;
  text-decoration: none;
  color: var(--color-text-soft);
  font-size: 0.88rem;
  padding: 5px 0;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--color-primary);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  margin-top: 44px;
  padding-top: 22px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ============ 工具类 ============ */
.text-accent {
  color: var(--color-primary);
  font-weight: 700;
}

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

.seo-description {
  max-width: 620px;
  margin: 0 auto 50px;
  opacity: 0.7;
  color: var(--color-text-soft);
  font-size: 0.95rem;
  line-height: 1.7;
  text-align: center;
}

.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }

/* ============ 装饰性元素 ============ */
.section-divider {
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-amber));
  border-radius: 3px;
  margin: 0 auto 40px;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 36px;
    min-height: auto;
    padding-top: 100px;
    padding-bottom: 40px;
  }

  .hero-content {
    max-width: 100%;
    order: 1;
  }

  .hero-image {
    order: 2;
    min-height: 280px;
  }

  .hero-image img {
    min-height: 280px;
  }

  .hero h1 {
    font-size: 2.6rem;
  }

  .feature-block {
    gap: 40px;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

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

@media (max-width: 768px) {
  .header-inner {
    height: 62px;
    padding: 0 20px;
  }

  .logo {
    font-size: 1.1rem;
  }

  .logo-icon {
    width: 32px;
    height: 32px;
    font-size: 0.9rem;
    border-radius: 8px;
  }

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 62px;
    left: 0;
    width: 100%;
    background: rgba(254, 252, 248, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 24px 20px;
    gap: 8px;
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--color-border-light);
    z-index: 999;
  }

  .main-nav.open a {
    padding: 14px 16px;
    width: 100%;
    border-radius: 10px;
    font-size: 1rem;
  }

  .main-nav.open a:hover {
    background: var(--color-amber-light);
  }

  .main-nav.open .nav-cta {
    text-align: center;
    margin-top: 8px;
    border-radius: 25px !important;
  }

  .hero {
    padding: 90px 20px 30px;
  }

  .hero h1 {
    font-size: 2.2rem;
    letter-spacing: -0.5px;
  }

  .hero p {
    font-size: 1rem;
  }

  .hero-image {
    min-height: 220px;
    border-radius: var(--radius-lg);
  }

  .hero-image img {
    min-height: 220px;
  }

  .hero-buttons {
    flex-direction: column;
    gap: 12px;
  }

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

  .section {
    padding: 56px 0;
  }

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

  .feature-block {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .feature-image {
    min-height: 240px;
  }

  .feature-image img {
    min-height: 240px;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .stat-number {
    font-size: 2rem;
  }

  .cards-grid,
  .content-wall {
    grid-template-columns: 1fr;
    gap: 18px;
  }

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

  .footer-bottom {
    margin-top: 30px;
  }

  .cta-banner {
    padding: 40px 20px;
    border-radius: var(--radius-lg);
  }

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

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .hero-image {
    min-height: 180px;
    border-radius: var(--radius-md);
  }

  .hero-image img {
    min-height: 180px;
  }

  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .section-title::after {
    width: 36px;
    height: 3px;
  }

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

  .category-card {
    padding: 22px 18px;
  }

  .stat-item {
    padding: 20px 14px;
  }

  .stat-number {
    font-size: 1.7rem;
  }

  .btn {
    padding: 12px 22px;
    font-size: 0.9rem;
    border-radius: 24px;
  }

  .section-label {
    font-size: 0.7rem;
    letter-spacing: 2px;
  }

  .faq-item .faq-question {
    padding: 14px 16px;
    font-size: 0.9rem;
  }

  .faq-item .faq-answer {
    padding: 0 16px 14px;
    font-size: 0.85rem;
  }
}

/* ============ 额外微交互 ============ */
@media (hover: hover) {
  .category-card:active {
    transform: scale(0.98);
  }

  .btn:active {
    transform: scale(0.96);
  }

  .content-wall-item:active {
    transform: scale(0.98);
  }
}

/* ============ 无障碍优化 ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============ 打印样式 ============ */
@media print {
  .site-header,
  .menu-toggle,
  .cta-banner,
  .nav-cta {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .section {
    padding: 20px 0;
  }
}