/* ============================================
   poly体育 — 聚合不凡
   杂志解构风 · 陶土×薄荷配色系统
   ============================================ */

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

:root {
  --cream: #fefaf6;
  --terracotta: #e07b5a;
  --terracotta-dark: #c9694a;
  --mint: #7ecba1;
  --mint-light: #eaf8f0;
  --charcoal: #3d3535;
  --mustard: #e8c56d;
  --warm-gray: #f3ede7;
  --border-soft: #e8ddd3;
  --white: #ffffff;
  --shadow-sm: 0 1px 2px rgba(61,53,53,0.04);
  --shadow-md: 0 6px 24px rgba(61,53,53,0.07);
  --shadow-lg: 0 12px 40px rgba(61,53,53,0.10);
  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 28px;
}

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

/* 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(--mint-light); }

.section:nth-child(even)::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 10%;
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--mint), transparent);
  opacity: 0.5;
}

/* 导航 — 固定顶部 */
.site-header {
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  background:rgba(254,250,246,0.92);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border-soft);
  transition: box-shadow 0.3s;
}
.site-header.scrolled { box-shadow: var(--shadow-md); }

.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(--charcoal);
  letter-spacing: -0.02em;
}
.logo-icon {
  width:40px; height:40px; border-radius:12px;
  background: linear-gradient(135deg, var(--terracotta) 0%, #f09b7a 100%);
  display:flex; align-items:center; justify-content:center;
  font-size:1.1rem; color:#fff; font-weight:700;
  box-shadow: 0 3px 10px rgba(224,123,90,0.25);
  position:relative;
}
.logo-icon::after {
  content: '';
  position: absolute;
  inset: 4px;
  border-radius: 8px;
  border: 2px dashed rgba(255,255,255,0.5);
}

.main-nav { display:flex; align-items:center; gap:32px; list-style:none; }
.main-nav a {
  text-decoration:none; font-size:0.9rem; font-weight:550;
  color: var(--charcoal); transition:0.25s;
  position: relative;
  padding: 4px 0;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2.5px;
  background: var(--terracotta);
  border-radius: 2px;
  transition: width 0.3s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.main-nav a:hover::after { width: 100%; }
.main-nav a:hover { color: var(--terracotta); }

.nav-cta {
  padding:10px 22px!important;
  border-radius:24px!important;
  background: var(--terracotta)!important;
  color:#fff!important;
  font-weight:650!important;
  letter-spacing:0.01em;
  box-shadow: 0 4px 14px rgba(224,123,90,0.3);
  transition: all 0.3s!important;
}
.nav-cta:hover {
  background: var(--terracotta-dark)!important;
  box-shadow: 0 6px 20px rgba(224,123,90,0.4);
  transform: translateY(-2px);
}
.nav-cta::after { display:none!important; }

.menu-toggle { display:none; background:none; border:none; cursor:pointer; padding:8px; color:var(--charcoal); }

/* 首页Hero */
.hero {
  min-height:78vh; display:flex; align-items:center;
  padding-top: 40px;
  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(126,203,161,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -80px; left: -100px;
  width: 340px; height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232,197,109,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  max-width:720px;
  position: relative;
  z-index: 1;
}
.hero-eyebrow {
  display:inline-block; font-size:0.8rem; font-weight:700;
  padding:5px 16px; border-radius:20px; margin-bottom:18px;
  background: var(--mint-light);
  color: #4a9e6e;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid rgba(126,203,161,0.35);
}
.hero h1 {
  font-size:3.2rem; line-height:1.15; margin-bottom:22px;
  font-weight: 850;
  letter-spacing: -0.03em;
  color: var(--charcoal);
}
.hero h1 .highlight {
  position: relative;
  display: inline-block;
}
.hero h1 .highlight::after {
  content: '';
  position: absolute;
  bottom: 4px; left: 0; width: 100%; height: 10px;
  background: rgba(232,197,109,0.5);
  border-radius: 3px;
  z-index: -1;
}
.hero p {
  font-size:1.15rem; opacity:0.75; max-width:540px; margin-bottom:36px;
  line-height: 1.7;
}
.hero-buttons { display:flex; gap:16px; flex-wrap:wrap; }

.hero-image {
  border-radius: var(--radius-xl);
  overflow:hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 1;
  border: 1px solid var(--border-soft);
}
.hero-image img { width:100%; height:auto; display:block; }

/* 按钮 */
.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:13px 30px; border-radius:25px; font-weight:650;
  cursor:pointer; border:none; text-decoration:none;
  transition: all 0.3s cubic-bezier(0.22, 0.61, 0.36, 1);
  font-size:0.95rem;
  letter-spacing: 0.01em;
}
.btn-primary {
  color:#fff;
  background: var(--terracotta);
  box-shadow: 0 4px 16px rgba(224,123,90,0.3);
}
.btn-primary:hover {
  background: var(--terracotta-dark);
  box-shadow: 0 6px 22px rgba(224,123,90,0.4);
  transform: translateY(-2px);
}
.btn-outline {
  background:transparent;
  border:1.8px solid var(--terracotta);
  color: var(--terracotta);
}
.btn-outline:hover {
  background: rgba(224,123,90,0.06);
  transform: translateY(-2px);
}
.btn-lg { padding:15px 36px; font-size:1rem; border-radius:28px; }

/* 标签/标题 */
.section-label {
  display:inline-block; font-size:0.78rem; font-weight:700;
  letter-spacing:3px; margin-bottom:12px;
  color: var(--terracotta);
  text-transform: uppercase;
  position: relative;
  padding-left: 28px;
}
.section-label::before {
  content: '';
  position: absolute;
  left: 0; top: 50%; transform: translateY(-50%);
  width: 18px; height: 2px;
  background: var(--terracotta);
  border-radius: 2px;
}
.section-title {
  font-size:2.2rem; margin-bottom:16px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--charcoal);
  line-height: 1.25;
}
.section-desc {
  max-width:600px; opacity:0.7; margin-bottom:44px;
  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:28px;
}
.category-card {
  border-radius: var(--radius-lg);
  padding:32px 28px;
  background: var(--white);
  border:1px solid var(--border-soft);
  transition: all 0.35s cubic-bezier(0.22, 0.61, 0.36, 1);
  position: relative;
  overflow: hidden;
}
.category-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--terracotta), var(--mustard));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.category-card:hover {
  transform:translateY(-5px);
  box-shadow: var(--shadow-lg);
  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:20px; font-size:1.4rem;
  background: var(--mint-light);
  color: #4a9e6e;
  transition: all 0.3s;
}
.category-card:hover .card-icon {
  background: var(--mint);
  color: #fff;
  transform: rotate(-5deg) scale(1.05);
}
.category-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--charcoal);
}
.category-card p {
  font-size: 0.9rem;
  opacity: 0.65;
  margin-bottom: 16px;
  line-height: 1.6;
}
.card-link {
  font-weight:650; font-size:0.85rem; text-decoration:none;
  color: var(--terracotta);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s;
}
.card-link:hover { gap: 10px; }
.card-link::after {
  content: '→';
  transition: transform 0.3s;
}
.card-link:hover::after { transform: translateX(3px); }

/* 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;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-soft);
  position: relative;
}
.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-xl);
  border: 3px dashed rgba(224,123,90,0.15);
  pointer-events: none;
}
.feature-image img { width:100%; height:auto; display:block; }

.feature-text { }
.feature-text h3 {
  font-size: 1.6rem;
  font-weight: 750;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.feature-text p {
  opacity: 0.7;
  margin-bottom: 20px;
  line-height: 1.7;
}
.feature-list { list-style:none; }
.feature-list li {
  padding:8px 0; display:flex; align-items:center; gap:10px;
  font-size: 0.95rem;
}
.feature-list li::before {
  content:'✓'; font-weight:700;
  color: var(--mint);
  background: var(--mint-light);
  width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  font-size: 0.75rem;
  flex-shrink: 0;
}

/* 数据条 */
.stats-bar {
  display:grid; grid-template-columns:repeat(4,1fr); gap:24px; text-align:center;
}
.stat-item {
  padding:32px 20px; border-radius: var(--radius-lg);
  background: var(--white);
  border:1px solid var(--border-soft);
  transition: all 0.35s;
  position: relative;
  overflow: hidden;
}
.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.stat-item::after {
  content: '';
  position: absolute;
  bottom: 0; left: 20%; width: 60%; height: 3px;
  background: linear-gradient(90deg, var(--mint), var(--terracotta));
  border-radius: 3px;
  opacity: 0;
  transition: opacity 0.35s;
}
.stat-item:hover::after { opacity: 1; }
.stat-number {
  font-size:2.6rem; font-weight:850;
  color: var(--terracotta);
  letter-spacing: -0.03em;
  line-height: 1;
}
.stat-label {
  font-size:0.9rem; opacity:0.6; margin-top:8px;
  font-weight: 500;
}

/* 内容墙 */
.content-wall {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(290px,1fr));
  gap:28px;
}
.content-wall-item {
  border-radius: var(--radius-lg);
  overflow:hidden;
  background: var(--white);
  border:1px solid var(--border-soft);
  transition: all 0.35s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.content-wall-item:hover {
  transform:translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.content-wall-item img {
  width:100%; height:210px; object-fit:cover;
  transition: transform 0.5s;
}
.content-wall-item:hover img { transform: scale(1.04); }
.content-wall-body { padding:22px 20px; }
.content-wall-body h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--charcoal);
}
.content-wall-body p {
  font-size: 0.88rem;
  opacity: 0.6;
  line-height: 1.6;
}
.content-wall-body .card-link { margin-top: 10px; }

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item {
  background: var(--white);
  border:1px solid var(--border-soft);
  border-radius:12px;
  margin-bottom:10px;
  overflow:hidden;
  cursor:pointer;
  transition: all 0.3s;
}
.faq-item:hover {
  border-color: var(--mint);
}
.faq-item .faq-question {
  padding:18px 24px; font-weight:650;
  display:flex; justify-content:space-between;
  align-items: center;
  font-size: 0.98rem;
}
.faq-item .faq-question::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--terracotta);
  transition: transform 0.3s;
}
.faq-item.open .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}
.faq-item .faq-answer {
  padding:0 24px 20px; display:none; opacity:0.7;
  font-size: 0.9rem;
  line-height: 1.7;
}
.faq-item.open {
  border-color: var(--mint);
  box-shadow: var(--shadow-sm);
}
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner {
  padding:64px 32px; text-align:center;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--terracotta) 0%, #e8946f 40%, #d4a574 100%);
  color:#fff;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  pointer-events: none;
}
.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -40px; left: -40px;
  width: 150px; height: 150px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  pointer-events: none;
}
.cta-banner h2 {
  color:#fff;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}
.cta-banner p {
  color: rgba(255,255,255,0.85);
  font-size: 1.05rem;
  margin: 12px 0 28px;
  position: relative;
  z-index: 1;
}
.cta-banner .btn-primary {
  background:#fff;
  color: var(--terracotta);
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
  position: relative;
  z-index: 1;
}
.cta-banner .btn-primary:hover {
  background: #fffefc;
  box-shadow: 0 8px 28px rgba(0,0,0,0.16);
}

/* 页脚 */
.site-footer {
  padding:60px 0 24px;
  background: #3d3535;
  color: rgba(255,255,255,0.75);
}
.site-footer .container { }
.footer-grid {
  display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:44px;
}
.footer-brand .logo {
  color: #fff;
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 0.9rem;
  opacity: 0.6;
  line-height: 1.7;
}
.footer-col h4 {
  color: #fff;
  font-weight: 700;
  margin-bottom: 16px;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
}
.footer-col a {
  display: block;
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  font-size: 0.88rem;
  padding: 5px 0;
  transition: color 0.25s;
}
.footer-col a:hover { color: var(--mustard); }
.footer-bottom {
  border-top:1px solid rgba(255,255,255,0.08);
  margin-top:44px;
  padding-top:22px;
  text-align:center;
  font-size:0.85rem;
  color: rgba(255,255,255,0.4);
}

/* 工具类 */
.text-accent { color: var(--terracotta); }
.text-center { text-align:center; }
.seo-description {
  max-width:620px; margin:0 auto 52px; opacity:0.7;
  font-size: 1rem;
  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: 2.4rem; }
  .section-title { font-size: 1.8rem; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; gap: 28px; }
}

@media (max-width: 768px) {
  .feature-block { grid-template-columns:1fr; gap: 36px; }
  .stats-bar { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; }
  .hero { min-height: auto; padding: 100px 0 60px; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 1rem; }

  .main-nav { display:none; }
  .menu-toggle {
    display:flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: var(--warm-gray);
    font-size: 1.4rem;
  }
  .main-nav.open {
    display:flex; flex-direction:column;
    position:absolute; top:70px; left:0; width:100%;
    background: var(--cream);
    padding:24px;
    border-bottom: 1px solid var(--border-soft);
    box-shadow: var(--shadow-md);
    gap: 16px;
    z-index: 999;
  }
  .main-nav.open a { font-size: 1rem; padding: 8px 0; }
  .nav-cta { text-align: center; display: block; }

  .section { padding: 56px 0; }
  .section-title { font-size: 1.6rem; }
  .cta-banner { padding: 44px 20px; }
  .cta-banner h2 { font-size: 1.5rem; }
}

@media (max-width: 480px) {
  .cards-grid,.content-wall,.stats-bar { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr; gap: 28px; }
  .hero-buttons { flex-direction:column; align-items: stretch; }
  .hero-buttons .btn { justify-content: center; }
  .hero h1 { font-size: 1.7rem; }
  .container { padding: 0 18px; }
  .header-inner { padding: 0 18px; }
  .site-header { padding: 0; }
  .section-title { font-size: 1.4rem; }
  .stat-number { font-size: 2rem; }
}