/* ============================================
   开云体育官网 - 主样式表
   kaiyun.com | KAIYUN开云体育官方网站
   ============================================ */

/* ---- CSS变量 ---- */
:root {
  --primary: #0a2a6e;
  --accent: #f47c20;
  --dark: #0d1117;
  --light: #f5f7fa;
  --text: #333;
  --text-muted: #666;
  --white: #fff;
  --border: #e0e4ea;
  --shadow: 0 4px 24px rgba(10,42,110,0.10);
  --radius: 10px;
  --transition: 0.3s ease;
  --font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font); color: var(--text); background: var(--white); line-height: 1.7; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: var(--font); }

/* ---- Container ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-alt { background: var(--light); }

/* ---- Section Title ---- */
.section-title { text-align: center; margin-bottom: 50px; }
.section-title h2 { font-size: 2rem; color: var(--primary); font-weight: 700; margin-bottom: 12px; }
.section-title p { color: var(--text-muted); font-size: 1rem; max-width: 600px; margin: 0 auto; }
.section-title .title-line {
  width: 60px; height: 4px; background: var(--accent);
  margin: 14px auto 0; border-radius: 2px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-block; padding: 12px 32px; border-radius: 50px;
  font-size: 1rem; font-weight: 600; transition: all var(--transition);
  letter-spacing: 0.5px;
}
.btn-primary { background: var(--accent); color: var(--white); }
.btn-primary:hover { background: #d96c10; color: var(--white); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(244,124,32,0.35); }
.btn-outline { border: 2px solid var(--white); color: var(--white); }
.btn-outline:hover { background: var(--white); color: var(--primary); }
.btn-dark { background: var(--primary); color: var(--white); }
.btn-dark:hover { background: #0c3499; color: var(--white); transform: translateY(-2px); }

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
#site-header {
  position: sticky; top: 0; z-index: 1000;
  background: var(--primary);
  box-shadow: 0 2px 12px rgba(0,0,0,0.2);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 70px;
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo img { width: 44px; height: 44px; border-radius: 8px; object-fit: contain; }
.logo-text { color: var(--white); }
.logo-text strong { display: block; font-size: 1.25rem; font-weight: 800; letter-spacing: 1px; }
.logo-text span { font-size: 0.7rem; opacity: 0.75; letter-spacing: 2px; }

/* Nav */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  color: rgba(255,255,255,0.85); padding: 8px 14px; border-radius: 6px;
  font-size: 0.9rem; font-weight: 500; transition: all var(--transition);
}
.main-nav a:hover, .main-nav a.active {
  color: var(--white); background: rgba(255,255,255,0.15);
}
.nav-cta {
  background: var(--accent) !important; color: var(--white) !important;
  padding: 8px 20px !important; border-radius: 50px !important;
}
.nav-cta:hover { background: #d96c10 !important; }

/* Mobile toggle */
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 6px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--white); border-radius: 2px; transition: all var(--transition); }

/* Search bar below nav */
.search-bar-wrap {
  background: rgba(255,255,255,0.07);
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 8px 0;
}
.search-bar-inner {
  display: flex; align-items: center; max-width: 600px;
  margin: 0 auto; padding: 0 20px;
}
.search-bar-inner input {
  flex: 1; padding: 8px 16px; border: 1px solid rgba(255,255,255,0.3);
  border-radius: 50px 0 0 50px; background: rgba(255,255,255,0.12);
  color: var(--white); font-size: 0.9rem; outline: none;
  font-family: var(--font);
}
.search-bar-inner input::placeholder { color: rgba(255,255,255,0.5); }
.search-bar-inner button {
  padding: 8px 22px; background: var(--accent); color: var(--white);
  border-radius: 0 50px 50px 0; font-size: 0.9rem; font-weight: 600;
  transition: background var(--transition);
}
.search-bar-inner button:hover { background: #d96c10; }

/* ============================================
   HERO BANNER / SLIDER
   ============================================ */
.hero-slider { position: relative; overflow: hidden; height: 580px; }
.hero-slide {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0; transition: opacity 0.8s ease;
  display: flex; align-items: center;
}
.hero-slide.active { opacity: 1; }
.hero-slide::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(10,42,110,0.82) 0%, rgba(10,42,110,0.4) 60%, transparent 100%);
}
.hero-content {
  position: relative; z-index: 2; max-width: 620px; color: var(--white);
  padding: 0 40px;
}
.hero-tag {
  display: inline-block; background: var(--accent); color: var(--white);
  font-size: 0.8rem; font-weight: 700; padding: 4px 14px; border-radius: 50px;
  margin-bottom: 16px; letter-spacing: 1px;
}
.hero-content h1 { font-size: 2.6rem; font-weight: 800; line-height: 1.25; margin-bottom: 16px; }
.hero-content p { font-size: 1.05rem; opacity: 0.9; margin-bottom: 28px; line-height: 1.7; }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 32px; margin-top: 36px; }
.hero-stat strong { display: block; font-size: 1.8rem; font-weight: 800; color: var(--accent); }
.hero-stat span { font-size: 0.8rem; opacity: 0.8; }

/* Slider controls */
.slider-dots {
  position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 8px; z-index: 10;
}
.slider-dot {
  width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,0.4);
  cursor: pointer; transition: all var(--transition);
}
.slider-dot.active { background: var(--accent); width: 24px; border-radius: 4px; }

/* ============================================
   BRAND INTRO
   ============================================ */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-img { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.about-img img { width: 100%; height: 360px; object-fit: cover; }
.about-text h2 { font-size: 1.9rem; color: var(--primary); margin-bottom: 16px; }
.about-text p { color: var(--text-muted); margin-bottom: 20px; }
.about-milestones { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 28px; }
.milestone-item {
  background: var(--light); border-radius: var(--radius); padding: 16px;
  border-left: 4px solid var(--accent);
}
.milestone-item strong { display: block; font-size: 1.5rem; color: var(--primary); font-weight: 800; }
.milestone-item span { font-size: 0.85rem; color: var(--text-muted); }

/* ============================================
   SERVICES
   ============================================ */
.services-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.service-card {
  background: var(--white); border-radius: var(--radius); padding: 32px 24px;
  text-align: center; box-shadow: var(--shadow);
  border: 1px solid var(--border); transition: all var(--transition);
}
.service-card:hover { transform: translateY(-6px); box-shadow: 0 12px 36px rgba(10,42,110,0.15); border-color: var(--accent); }
.service-icon {
  width: 64px; height: 64px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), #1a4db8);
  display: flex; align-items: center; justify-content: center; margin: 0 auto 20px;
  font-size: 1.8rem;
}
.service-card h3 { font-size: 1.05rem; color: var(--primary); margin-bottom: 10px; font-weight: 700; }
.service-card p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.7; }

/* ============================================
   VIDEO GRID (赛事视频)
   ============================================ */
.video-section { background: var(--dark); }
.video-section .section-title h2 { color: var(--white); }
.video-section .section-title p { color: rgba(255,255,255,0.6); }
.video-section .title-line { background: var(--accent); }
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.video-card {
  position: relative; border-radius: var(--radius); overflow: hidden;
  cursor: pointer; background: #1a1f2e;
}
.video-card-thumb {
  position: relative; overflow: hidden; aspect-ratio: 16/9;
}
.video-card-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.4s ease;
}
.video-play-btn {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.3); transition: all var(--transition);
}
.play-icon {
  width: 54px; height: 54px; border-radius: 50%;
  background: rgba(244,124,32,0.9); display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.play-icon::after {
  content: ''; border-left: 18px solid var(--white); border-top: 11px solid transparent;
  border-bottom: 11px solid transparent; margin-left: 4px;
}
.video-card:hover .video-card-thumb img { transform: scale(1.06); }
.video-card:hover .play-icon { transform: scale(1.15); background: var(--accent); }
.video-card:hover .video-play-btn { background: rgba(0,0,0,0.1); }
.video-card-info { padding: 16px; }
.video-card-info h3 { color: var(--white); font-size: 0.95rem; margin-bottom: 8px; font-weight: 600; }
.video-meta { display: flex; gap: 14px; font-size: 0.78rem; color: rgba(255,255,255,0.5); }
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-badge {
  position: absolute; top: 10px; left: 10px;
  background: var(--accent); color: var(--white);
  font-size: 0.72rem; font-weight: 700; padding: 3px 10px; border-radius: 50px;
}
.video-badge.live { background: #e53e3e; animation: pulse 1.5s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.6} }

/* ============================================
   CASES
   ============================================ */
.cases-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.case-card {
  background: var(--white); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); transition: all var(--transition);
  border: 1px solid var(--border);
}
.case-card:hover { transform: translateY(-4px); box-shadow: 0 12px 36px rgba(10,42,110,0.15); }
.case-card-img { height: 200px; overflow: hidden; }
.case-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.case-card:hover .case-card-img img { transform: scale(1.05); }
.case-card-body { padding: 20px; }
.case-tag {
  display: inline-block; background: rgba(10,42,110,0.08); color: var(--primary);
  font-size: 0.75rem; font-weight: 600; padding: 3px 10px; border-radius: 50px; margin-bottom: 10px;
}
.case-card-body h3 { font-size: 1rem; color: var(--text); margin-bottom: 10px; font-weight: 700; }
.case-stats { display: flex; gap: 18px; font-size: 0.82rem; color: var(--text-muted); }
.case-stats span { display: flex; align-items: center; gap: 4px; }

/* ============================================
   NEWS
   ============================================ */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
  background: var(--white); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); border: 1px solid var(--border); transition: all var(--transition);
}
.news-card:hover { transform: translateY(-4px); box-shadow: 0 12px 36px rgba(10,42,110,0.12); }
.news-card-img { height: 180px; overflow: hidden; }
.news-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.news-card:hover .news-card-img img { transform: scale(1.05); }
.news-card-body { padding: 20px; }
.news-date { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 8px; }
.news-card-body h3 { font-size: 0.95rem; color: var(--text); font-weight: 700; margin-bottom: 8px; line-height: 1.5; }
.news-card-body p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }
.news-read-more { display: inline-block; margin-top: 12px; font-size: 0.85rem; color: var(--accent); font-weight: 600; }

/* ============================================
   REVIEWS
   ============================================ */
.reviews-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.review-card {
  background: var(--white); border-radius: var(--radius); padding: 24px;
  box-shadow: var(--shadow); border: 1px solid var(--border); transition: all var(--transition);
}
.review-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.review-stars { color: #f5a623; font-size: 1rem; margin-bottom: 12px; }
.review-text { font-size: 0.88rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; font-style: italic; }
.review-user { display: flex; align-items: center; gap: 10px; }
.review-avatar {
  width: 40px; height: 40px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex; align-items: center; justify-content: center;
  color: var(--white); font-weight: 700; font-size: 0.9rem;
}
.review-user-info strong { display: block; font-size: 0.9rem; color: var(--text); }
.review-user-info span { font-size: 0.75rem; color: var(--text-muted); }

/* ============================================
   FAQ
   ============================================ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border); border-radius: var(--radius);
  margin-bottom: 12px; overflow: hidden;
}
.faq-question {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 24px; cursor: pointer; background: var(--white);
  font-weight: 600; font-size: 0.95rem; color: var(--text);
  transition: background var(--transition);
}
.faq-question:hover { background: var(--light); }
.faq-question.open { background: var(--primary); color: var(--white); }
.faq-icon { font-size: 1.2rem; font-weight: 300; transition: transform var(--transition); }
.faq-question.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s;
  padding: 0 24px; font-size: 0.9rem; color: var(--text-muted); line-height: 1.8;
  background: var(--light);
}
.faq-answer.open { max-height: 200px; padding: 16px 24px; }

/* ============================================
   PARTNERS
   ============================================ */
.partners-row {
  display: flex; flex-wrap: wrap; gap: 20px; justify-content: center; align-items: center;
}
.partner-item {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 28px; font-weight: 700; font-size: 0.95rem; color: var(--text-muted);
  transition: all var(--transition);
}
.partner-item:hover { border-color: var(--accent); color: var(--primary); transform: translateY(-2px); }

/* ============================================
   CONTACT
   ============================================ */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; }
.contact-info h2 { font-size: 1.8rem; color: var(--primary); margin-bottom: 20px; }
.contact-info p { color: var(--text-muted); margin-bottom: 28px; }
.contact-items { display: flex; flex-direction: column; gap: 16px; }
.contact-item { display: flex; align-items: flex-start; gap: 14px; }
.contact-icon {
  width: 44px; height: 44px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), #1a4db8);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}
.contact-item-text strong { display: block; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 2px; }
.contact-item-text span { font-size: 0.95rem; color: var(--text); font-weight: 600; }
.map-placeholder {
  background: var(--light); border-radius: var(--radius); height: 300px;
  display: flex; align-items: center; justify-content: center;
  border: 2px dashed var(--border); color: var(--text-muted); font-size: 0.9rem;
}

/* ============================================
   FOOTER
   ============================================ */
#site-footer { background: var(--dark); color: rgba(255,255,255,0.75); }
.footer-top { padding: 60px 0 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand .logo-text strong { color: var(--white); font-size: 1.3rem; }
.footer-brand .logo-text span { color: rgba(255,255,255,0.5); }
.footer-brand p { font-size: 0.88rem; margin-top: 14px; line-height: 1.8; }
.footer-col h4 { color: var(--white); font-size: 0.95rem; font-weight: 700; margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: 0.85rem; color: rgba(255,255,255,0.6); transition: color var(--transition); }
.footer-col ul li a:hover { color: var(--accent); }
.footer-qr { display: flex; gap: 20px; margin-top: 20px; }
.qr-item { text-align: center; }
.qr-box {
  width: 80px; height: 80px; background: var(--white); border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.65rem; color: var(--text-muted); text-align: center;
  padding: 4px;
}
.qr-item span { display: block; font-size: 0.72rem; color: rgba(255,255,255,0.5); margin-top: 6px; }
.footer-bottom {
  padding: 20px 0; display: flex; align-items: center; justify-content: space-between;
  font-size: 0.82rem; flex-wrap: wrap; gap: 10px;
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--accent); }
.social-links { display: flex; gap: 12px; }
.social-link {
  width: 34px; height: 34px; border-radius: 50%; background: rgba(255,255,255,0.1);
  display: flex; align-items: center; justify-content: center; font-size: 0.85rem;
  transition: all var(--transition);
}
.social-link:hover { background: var(--accent); color: var(--white); }

/* ============================================
   BREADCRUMB
   ============================================ */
.breadcrumb {
  background: var(--light); padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.breadcrumb-list { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; }
.breadcrumb-list li::after { content: '/'; margin-left: 8px; color: var(--text-muted); }
.breadcrumb-list li:last-child::after { display: none; }
.breadcrumb-list a { color: var(--text-muted); }
.breadcrumb-list a:hover { color: var(--accent); }
.breadcrumb-list li:last-child { color: var(--primary); font-weight: 600; }

/* ============================================
   INNER PAGE HERO
   ============================================ */
.inner-hero {
  background: linear-gradient(135deg, var(--primary) 0%, #1a4db8 100%);
  padding: 60px 0; text-align: center; color: var(--white);
}
.inner-hero h1 { font-size: 2.2rem; font-weight: 800; margin-bottom: 12px; }
.inner-hero p { font-size: 1rem; opacity: 0.85; max-width: 600px; margin: 0 auto; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .hero-slider { height: 420px; }
  .hero-content h1 { font-size: 1.8rem; }
  .hero-content { padding: 0 20px; }
  .hero-stats { gap: 20px; }
  .about-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .main-nav { display: none; flex-direction: column; position: absolute; top: 70px; left: 0; right: 0; background: var(--primary); padding: 16px; gap: 4px; }
  .main-nav.open { display: flex; }
  .nav-toggle { display: flex; }
  .section { padding: 50px 0; }
  .section-title h2 { font-size: 1.6rem; }
}
@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .hero-btns { flex-direction: column; }
}