/* 开云体育 kai-yun.fit - 全局样式 */
:root {
  --primary: #1a7a3c;
  --primary-dark: #0f5a2a;
  --primary-light: #2ecc71;
  --accent: #f5a623;
  --bg-dark: #0d1117;
  --bg-card: #161b22;
  --bg-section: #f8faf9;
  --text: #1a1a2e;
  --text-muted: #5a6270;
  --text-light: #e8eaed;
  --border: #e2e8f0;
  --shadow: 0 4px 24px rgba(0,0,0,.08);
  --radius: 12px;
  --header-h: 72px;
  --max-w: 1200px;
  --transition: .3s ease;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  line-height: 1.75;
  background: #fff;
}

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

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

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-dark);
  box-shadow: 0 2px 12px rgba(0,0,0,.3);
  height: var(--header-h);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  font-weight: 700;
  font-size: 1.15rem;
}

.logo-link img { width: 44px; height: 44px; border-radius: 8px; object-fit: cover; }
.logo-link:hover { color: var(--primary-light); }

.main-nav { display: flex; align-items: center; gap: 6px; }

.main-nav a {
  color: var(--text-light);
  padding: 8px 14px;
  border-radius: 6px;
  font-size: .95rem;
  white-space: nowrap;
}

.main-nav a:hover, .main-nav a.active {
  background: rgba(46,204,113,.15);
  color: var(--primary-light);
}

.nav-cta {
  background: var(--primary) !important;
  color: #fff !important;
  font-weight: 600;
}

.nav-cta:hover { background: var(--primary-light) !important; color: #fff !important; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 3px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, #1a3a2a 50%, var(--primary-dark) 100%);
  color: #fff;
  padding: 80px 0 60px;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: url("/images/足球.jpg") center/cover no-repeat;
  opacity: .12;
}

.hero .container { position: relative; z-index: 1; }

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.3;
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 1.05rem;
  opacity: .9;
  margin-bottom: 32px;
  max-width: 540px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary { background: var(--primary-light); color: #fff; }
.btn-primary:hover { background: #27ae60; color: #fff; transform: translateY(-2px); }

.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,.5);
}

.btn-outline:hover { border-color: #fff; color: #fff; background: rgba(255,255,255,.1); }

.hero-img {
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0,0,0,.4);
  border: 3px solid rgba(255,255,255,.15);
}

/* Sections */
section { padding: 72px 0; }

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

.section-header { text-align: center; margin-bottom: 48px; }

.section-header h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--text);
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-muted);
  max-width: 640px;
  margin: 0 auto;
  font-size: 1.05rem;
}

.section-header .divider {
  width: 60px;
  height: 4px;
  background: var(--primary);
  margin: 16px auto 0;
  border-radius: 2px;
}

/* Cards Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid var(--border);
}

.card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0,0,0,.12); }

.card-img { height: 200px; overflow: hidden; }
.card-img img { width: 100%; height: 100%; object-fit: cover; }

.card-body { padding: 24px; }
.card-body h3 { font-size: 1.15rem; margin-bottom: 10px; color: var(--text); }
.card-body p { color: var(--text-muted); font-size: .95rem; }

/* Feature boxes */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.feature-box {
  background: #fff;
  padding: 32px 24px;
  border-radius: var(--radius);
  text-align: center;
  box-shadow: var(--shadow);
  border-top: 4px solid var(--primary);
}

.feature-box .icon { font-size: 2.5rem; margin-bottom: 16px; }
.feature-box h3 { margin-bottom: 10px; font-size: 1.1rem; }
.feature-box p { color: var(--text-muted); font-size: .92rem; }

/* App Download */
.app-section { background: linear-gradient(135deg, #0d1117, #1a3a2a); color: #fff; }
.app-section .section-header h2, .app-section .section-header p { color: #fff; }
.app-section .section-header p { opacity: .8; }

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 32px;
}

.app-card {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
}

.app-card img {
  max-height: 220px;
  margin: 0 auto 20px;
  border-radius: 8px;
}

.app-card h3 { margin-bottom: 12px; font-size: 1.2rem; }
.app-card p { opacity: .85; margin-bottom: 20px; font-size: .95rem; }

/* Partners */
.partner-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  align-items: center;
}

.partner-logos img {
  height: 60px;
  width: auto;
  object-fit: contain;
  filter: grayscale(20%);
  transition: var(--transition);
  border-radius: 6px;
}

.partner-logos img:hover { filter: none; transform: scale(1.05); }

/* FAQ */
.faq-list { max-width: 860px; margin: 0 auto; }

.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  background: none;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text);
  font-family: inherit;
}

.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--primary);
  transition: var(--transition);
}

.faq-item.open .faq-question::after { content: "−"; }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--text-muted);
  font-size: .95rem;
}

.faq-item.open .faq-answer { max-height: 500px; }

/* Content Article */
.content-article { max-width: 860px; margin: 0 auto; }
.content-article h2 { font-size: 1.5rem; margin: 40px 0 16px; color: var(--text); }
.content-article h3 { font-size: 1.2rem; margin: 28px 0 12px; color: var(--primary-dark); }
.content-article p { margin-bottom: 16px; color: var(--text-muted); }
.content-article ul, .content-article ol { margin: 0 0 16px 24px; color: var(--text-muted); }
.content-article li { margin-bottom: 8px; }
.content-article img { border-radius: var(--radius); margin: 24px auto; box-shadow: var(--shadow); }

/* Breadcrumb */
.breadcrumb {
  padding: 16px 0;
  font-size: .9rem;
  color: var(--text-muted);
  background: var(--bg-section);
  border-bottom: 1px solid var(--border);
}

.breadcrumb a { color: var(--primary); }
.breadcrumb span { margin: 0 8px; }

/* Page Hero */
.page-hero {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  padding: 48px 0;
  text-align: center;
}

.page-hero h1 { font-size: clamp(1.6rem, 3vw, 2.2rem); margin-bottom: 12px; }
.page-hero p { opacity: .9; max-width: 600px; margin: 0 auto; }

/* Form */
.form-section { padding: 60px 0; }

.form-wrapper {
  max-width: 480px;
  margin: 0 auto;
  background: #fff;
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: .92rem; }

.form-group input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color var(--transition);
  font-family: inherit;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,122,60,.15);
}

.form-footer { text-align: center; margin-top: 20px; font-size: .92rem; color: var(--text-muted); }

.seo-content {
  max-width: 860px;
  margin: 48px auto 0;
  padding-top: 48px;
  border-top: 1px solid var(--border);
}

.seo-content h2 { font-size: 1.3rem; margin-bottom: 16px; }
.seo-content p { color: var(--text-muted); margin-bottom: 12px; font-size: .95rem; }

/* Internal links block */
.internal-links {
  background: var(--bg-section);
  padding: 32px;
  border-radius: var(--radius);
  margin: 40px 0;
}

.internal-links h3 { margin-bottom: 16px; font-size: 1.1rem; }

.link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  list-style: none;
}

.link-list a {
  display: inline-block;
  padding: 8px 16px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .9rem;
}

.link-list a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Footer */
.site-footer {
  background: var(--bg-dark);
  color: var(--text-light);
  padding: 60px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand img { width: 48px; border-radius: 8px; margin-bottom: 16px; }
.footer-brand p { opacity: .7; font-size: .9rem; line-height: 1.7; }

.footer-col h4 { margin-bottom: 16px; font-size: 1rem; color: #fff; }

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: rgba(255,255,255,.7); font-size: .9rem; }
.footer-col a:hover { color: var(--primary-light); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 24px;
  text-align: center;
  font-size: .85rem;
  opacity: .6;
}

/* Error pages */
.error-page {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
}

.error-code { font-size: 6rem; font-weight: 800; color: var(--primary); line-height: 1; }
.error-page h1 { font-size: 1.8rem; margin: 16px 0; }
.error-page p { color: var(--text-muted); margin-bottom: 32px; max-width: 480px; margin-left: auto; margin-right: auto; }

/* Sponsor timeline */
.sponsor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}

.sponsor-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.sponsor-card img { width: 100%; height: 180px; object-fit: cover; }
.sponsor-card .sponsor-body { padding: 20px; }
.sponsor-card h3 { font-size: 1rem; margin-bottom: 8px; }
.sponsor-card p { font-size: .9rem; color: var(--text-muted); }

/* 广告栏 */
.ads-wrap {
  background: linear-gradient(180deg, #edf7f0 0%, #f8faf9 100%);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
  position: sticky;
  top: var(--header-h);
  z-index: 900;
  display: none;
}

.ads-wrap.ads-loaded { display: block; }

.ads-wrap .ads-label {
  text-align: center;
  font-size: .75rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  letter-spacing: .05em;
}

#ads {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 16px 20px;
  background: transparent;
}

#ads .ads-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 80px;
}

#ads figure { margin: 0; text-align: center; }

#ads a {
  display: block;
  padding: 4px;
  border-radius: 20px;
  transition: transform 180ms ease;
}

#ads a:active { transform: scale(.96); }

#ads img {
  width: 72px;
  height: 72px;
  object-fit: cover;
  border-radius: 18px;
  box-shadow: 0 6px 18px rgba(24,24,24,.14);
  transition: transform 180ms ease, box-shadow 180ms ease;
  display: block;
  border: 2px solid #fff;
  background: #fff;
}

#ads a:hover img {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 12px 28px rgba(26,122,60,.22);
}

#ads .caption {
  margin-top: 6px;
  font-size: 11px;
  color: #555;
  text-align: center;
  max-width: 80px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: 1.3;
}

/* Responsive */
@media (max-width: 992px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-btns { justify-content: center; }
  .hero-img-wrap { order: -1; }
}

@media (max-width: 768px) {
  .hamburger { display: flex; }

  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--bg-dark);
    flex-direction: column;
    align-items: stretch;
    padding: calc(var(--header-h) + 20px) 20px 20px;
    gap: 4px;
    transition: right var(--transition);
    box-shadow: -4px 0 20px rgba(0,0,0,.3);
    overflow-y: auto;
  }

  .main-nav.open { right: 0; }
  .main-nav a { padding: 14px 16px; border-radius: 8px; }

  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 999;
  }

  .nav-overlay.open { display: block; }

  .footer-grid { grid-template-columns: 1fr; }
  section { padding: 48px 0; }
  .form-wrapper { padding: 28px 20px; }
  #ads .ads-item { width: 76px; }
  #ads img { width: 68px; height: 68px; }
}