/* ============================================================
   51吃瓜官网 - 全局样式表
   Theme: 娱乐八卦 / 网红爆料 资讯门户
   ============================================================ */

:root {
  --color-primary: #e63946;
  --color-primary-dark: #c1121f;
  --color-primary-light: #ff6b6b;
  --color-secondary: #f4a261;
  --color-accent: #ffd166;
  --color-dark: #0f0f1a;
  --color-dark-2: #1a1a2e;
  --color-dark-3: #25253f;
  --color-surface: #ffffff;
  --color-surface-alt: #f7f7fb;
  --color-text: #2d3436;
  --color-text-light: #636e72;
  --color-text-muted: #b2bec3;
  --color-border: #e9ecef;
  --color-success: #00b894;
  --color-warning: #fdcb6e;
  --color-info: #0984e3;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-primary: 0 10px 30px rgba(230, 57, 70, 0.3);

  --container: 1200px;
  --header-h: 72px;

  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-surface);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: 1rem; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 { font-weight: 700; line-height: 1.3; color: var(--color-dark); }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: 1.25rem; }
.section-tag {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(230, 57, 70, 0.1);
  color: var(--color-primary);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 14px;
  letter-spacing: 1px;
}
.section-title { text-align: center; margin-bottom: 16px; }
.section-subtitle {
  text-align: center;
  color: var(--color-text-light);
  max-width: 680px;
  margin: 0 auto 56px;
  font-size: 1.05rem;
}
.text-gradient {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 36px rgba(230, 57, 70, 0.4); }
.btn-outline {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}
.btn-outline:hover { background: var(--color-primary); color: #fff; }
.btn-ghost { background: rgba(255,255,255,0.15); color: #fff; backdrop-filter: blur(8px); }
.btn-ghost:hover { background: rgba(255,255,255,0.28); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 1000;
  background: rgba(15, 15, 26, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(15, 15, 26, 0.96);
  box-shadow: var(--shadow-md);
}
.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 800;
  font-size: 1.35rem;
}
.brand-mark {
  width: 40px; height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  display: grid;
  place-items: center;
  font-size: 1.3rem;
  box-shadow: var(--shadow-primary);
}
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  color: rgba(255,255,255,0.78);
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.95rem;
}
.nav-links a:hover, .nav-links a.active {
  color: #fff;
  background: rgba(255,255,255,0.08);
}
.nav-cta { margin-left: 12px; padding: 9px 22px !important; background: var(--color-primary); color: #fff !important; border-radius: 999px; }
.nav-cta:hover { background: var(--color-primary-dark) !important; }
.menu-toggle {
  display: none;
  width: 42px; height: 42px;
  border-radius: 10px;
  background: rgba(255,255,255,0.08);
  color: #fff;
  font-size: 1.4rem;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 60px) 0 80px;
  background:
    radial-gradient(circle at 20% 20%, rgba(230,57,70,0.25), transparent 45%),
    radial-gradient(circle at 80% 30%, rgba(244,162,97,0.22), transparent 45%),
    linear-gradient(180deg, #0f0f1a 0%, #1a1a2e 60%, #0f0f1a 100%);
  color: #fff;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}
.hero-content { animation: fadeUp 0.9s ease both; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 999px;
  font-size: 0.9rem;
  margin-bottom: 24px;
}
.hero-badge .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 0 var(--color-success);
  animation: pulse 2s infinite;
}
.hero h1 { color: #fff; margin-bottom: 20px; }
.hero h1 span { color: var(--color-primary-light); }
.hero-lead {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.8);
  margin-bottom: 36px;
  max-width: 560px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
.hero-stats {
  display: flex;
  gap: 36px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.hero-stats .num { font-size: 2rem; font-weight: 800; color: var(--color-secondary); }
.hero-stats .label { font-size: 0.85rem; color: rgba(255,255,255,0.6); }

.hero-visual { position: relative; animation: fadeIn 1.2s ease both; }
.hero-card-stack { position: relative; height: 480px; }
.hero-card {
  position: absolute;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
}
.hero-card.main {
  width: 78%; height: 320px;
  top: 0; right: 0;
  transform: rotate(3deg);
}
.hero-card.sub {
  width: 55%; height: 220px;
  bottom: 0; left: 0;
  transform: rotate(-6deg);
}
.hero-card img { width: 100%; height: 100%; object-fit: cover; }
.hero-card .tag {
  position: absolute;
  top: 14px; left: 14px;
  padding: 5px 12px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
}
.float-badge {
  position: absolute;
  padding: 12px 18px;
  background: rgba(255,255,255,0.95);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 5;
  animation: floatY 4s ease-in-out infinite;
}
.float-badge.one { top: 40px; left: -20px; }
.float-badge.two { bottom: 60px; right: -10px; animation-delay: 1.5s; }
.float-badge .ico {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  display: grid; place-items: center;
  font-size: 1.1rem;
}
.float-badge .txt strong { display: block; color: var(--color-dark); font-size: 0.9rem; }
.float-badge .txt small { color: var(--color-text-light); font-size: 0.75rem; }

/* ---------- Sections ---------- */
section { padding: 90px 0; }
.section-dark { background: var(--color-dark); color: #fff; }
.section-dark .section-title, .section-dark h2, .section-dark h3 { color: #fff; }
.section-dark .section-subtitle { color: rgba(255,255,255,0.7); }

/* ---------- Features ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 28px;
}
.feature-card {
  padding: 36px 28px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
  width: 64px; height: 64px;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(230,57,70,0.12), rgba(244,162,97,0.12));
  display: grid; place-items: center;
  font-size: 1.8rem;
  margin-bottom: 20px;
}
.feature-card h3 { margin-bottom: 12px; }
.feature-card p { color: var(--color-text-light); font-size: 0.95rem; }

/* ---------- Services ---------- */
.services-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.services-media {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.services-media img { width: 100%; height: 440px; object-fit: cover; }
.services-list { display: flex; flex-direction: column; gap: 22px; }
.service-item {
  display: flex;
  gap: 18px;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: var(--transition);
}
.service-item:hover { border-color: var(--color-primary); transform: translateX(6px); box-shadow: var(--shadow-md); }
.service-item .ico {
  flex-shrink: 0;
  width: 48px; height: 48px;
  border-radius: 12px;
  background: var(--color-primary);
  color: #fff;
  display: grid; place-items: center;
  font-size: 1.3rem;
}
.service-item h4 { margin-bottom: 6px; font-size: 1.1rem; }
.service-item p { color: var(--color-text-light); font-size: 0.9rem; }

/* ---------- News Cards ---------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}
.news-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.news-card .thumb {
  position: relative;
  height: 200px;
  overflow: hidden;
}
.news-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.news-card:hover .thumb img { transform: scale(1.08); }
.news-card .cat {
  position: absolute;
  top: 12px; left: 12px;
  padding: 4px 12px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
}
.news-card .body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.news-card .meta {
  display: flex;
  gap: 14px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 10px;
}
.news-card h3 { font-size: 1.1rem; margin-bottom: 10px; line-height: 1.5; }
.news-card p { color: var(--color-text-light); font-size: 0.9rem; flex: 1; }
.news-card .more {
  margin-top: 16px;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ---------- Products ---------- */
.product-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 48px;
}
.product-tabs button {
  padding: 10px 24px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--color-border);
  font-weight: 600;
  color: var(--color-text-light);
  transition: var(--transition);
}
.product-tabs button.active, .product-tabs button:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}
.product-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.product-card .p-thumb { height: 200px; overflow: hidden; position: relative; }
.product-card .p-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.product-card:hover .p-thumb img { transform: scale(1.1); }
.product-card .p-body { padding: 24px; }
.product-card .price {
  color: var(--color-primary);
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 8px;
}
.product-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.product-card p { color: var(--color-text-light); font-size: 0.9rem; margin-bottom: 18px; }

/* ---------- FAQ ---------- */
.faq-wrap { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.active { border-color: var(--color-primary); box-shadow: var(--shadow-md); }
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 26px;
  cursor: pointer;
  font-weight: 600;
  color: var(--color-dark);
}
.faq-q .arrow { transition: var(--transition); color: var(--color-primary); font-size: 1.2rem; }
.faq-item.active .faq-q .arrow { transform: rotate(180deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 26px;
  color: var(--color-text-light);
}
.faq-item.active .faq-a { max-height: 300px; padding: 0 26px 22px; }

/* ---------- CTA ---------- */
.cta-box {
  position: relative;
  padding: 70px 50px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 50%, #8d0801 100%);
  color: #fff;
  text-align: center;
  overflow: hidden;
}
.cta-box::before, .cta-box::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
}
.cta-box::before { width: 320px; height: 320px; top: -120px; left: -80px; }
.cta-box::after { width: 260px; height: 260px; bottom: -100px; right: -60px; }
.cta-box > * { position: relative; z-index: 2; }
.cta-box h2 { color: #fff; margin-bottom: 16px; }
.cta-box p { font-size: 1.1rem; opacity: 0.92; margin-bottom: 32px; max-width: 600px; margin-left: auto; margin-right: auto; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-dark);
  color: rgba(255,255,255,0.7);
  padding: 70px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .brand { margin-bottom: 18px; }
.footer-brand p { font-size: 0.92rem; line-height: 1.8; margin-bottom: 20px; }
.social-row { display: flex; gap: 10px; }
.social-row a {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: rgba(255,255,255,0.08);
  display: grid; place-items: center;
  transition: var(--transition);
}
.social-row a:hover { background: var(--color-primary); transform: translateY(-3px); }
.footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul a:hover { color: var(--color-primary-light); }
.footer-bottom {
  padding: 24px 0;
  text-align: center;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.5);
}

/* ---------- Page Hero (inner pages) ---------- */
.page-hero {
  padding: calc(var(--header-h) + 70px) 0 60px;
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-2) 100%);
  color: #fff;
  text-align: center;
}
.page-hero h1 { color: #fff; margin-bottom: 16px; }
.page-hero .breadcrumb {
  display: flex;
  justify-content: center;
  gap: 10px;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
}
.page-hero .breadcrumb a:hover { color: var(--color-primary-light); }

/* ---------- News Detail ---------- */
.detail-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 50px;
  padding: 70px 0;
}
.article-hero {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 30px;
  height: 420px;
}
.article-hero img { width: 100%; height: 100%; object-fit: cover; }
.article-content h1 { font-size: 2rem; margin-bottom: 18px; }
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}
.article-body p { margin-bottom: 20px; font-size: 1.02rem; }
.article-body h2 { font-size: 1.5rem; margin: 32px 0 16px; }
.article-body blockquote {
  margin: 28px 0;
  padding: 22px 28px;
  background: var(--color-surface-alt);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text-light);
  font-style: italic;
}
.sidebar-widget {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 28px;
}
.sidebar-widget h4 { margin-bottom: 18px; padding-bottom: 14px; border-bottom: 2px solid var(--color-primary); display: inline-block; }
.hot-item {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--color-border);
}
.hot-item:last-child { border: none; }
.hot-item .rank {
  flex-shrink: 0;
  width: 26px; height: 26px;
  border-radius: 6px;
  background: var(--color-surface-alt);
  color: var(--color-text-muted);
  display: grid; place-items: center;
  font-weight: 700;
  font-size: 0.85rem;
}
.hot-item:nth-child(-n+3) .rank { background: var(--color-primary); color: #fff; }
.hot-item a { font-size: 0.92rem; line-height: 1.5; color: var(--color-text); }
.hot-item a:hover { color: var(--color-primary); }

/* ---------- Contact ---------- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: start;
}
.contact-info-card {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  padding: 44px;
  border-radius: var(--radius-xl);
}
.contact-info-card h2 { color: #fff; margin-bottom: 16px; }
.contact-info-card p { opacity: 0.9; margin-bottom: 36px; }
.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 26px;
  align-items: flex-start;
}
.contact-item .ico {
  width: 46px; height: 46px;
  border-radius: 12px;
  background: rgba(255,255,255,0.15);
  display: grid; place-items: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.contact-item .txt strong { display: block; margin-bottom: 4px; }
.contact-item .txt small { opacity: 0.8; }
.form-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 44px;
  box-shadow: var(--shadow-sm);
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--color-dark);
  font-size: 0.92rem;
}
.form-control {
  width: 100%;
  padding: 14px 18px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  background: var(--color-surface-alt);
}
.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(230,57,70,0.1);
}
textarea.form-control { min-height: 140px; resize: vertical; }

/* ---------- About timeline ---------- */
.timeline { position: relative; max-width: 820px; margin: 0 auto; padding-left: 30px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 8px; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(var(--color-primary), var(--color-secondary));
}
.tl-item { position: relative; padding-bottom: 36px; }
.tl-item::before {
  content: "";
  position: absolute;
  left: -29px; top: 6px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--color-primary);
  box-shadow: 0 0 0 4px rgba(230,57,70,0.15);
}
.tl-item .year { color: var(--color-primary); font-weight: 700; margin-bottom: 6px; }
.tl-item h4 { margin-bottom: 8px; }

/* ---------- Animations ---------- */
@keyframes fadeUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes floatY { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(0,184,148,0.6); } 70% { box-shadow: 0 0 0 12px rgba(0,184,148,0); } 100% { box-shadow: 0 0 0 0 rgba(0,184,148,0); } }

.reveal { opacity: 0; transform: translateY(30px); transition: all 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- Back to top ---------- */
.back-top {
  position: fixed;
  right: 24px; bottom: 24px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: grid; place-items: center;
  box-shadow: var(--shadow-primary);
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  z-index: 999;
  font-size: 1.2rem;
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { transform: translateY(-4px); }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 50px; }
  .hero-visual { order: -1; }
  .hero-card-stack { height: 360px; max-width: 420px; margin: 0 auto; }
  .services-layout { grid-template-columns: 1fr; }
  .detail-layout { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  section { padding: 60px 0; }
  .nav-links {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    background: var(--color-dark);
    flex-direction: column;
    align-items: stretch;
    padding: 20px;
    gap: 4px;
    transform: translateY(-120%);
    transition: transform 0.35s ease;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { padding: 14px 18px; }
  .menu-toggle { display: grid; place-items: center; }
  .hero-stats { flex-wrap: wrap; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-box { padding: 50px 24px; }
  .form-card, .contact-info-card { padding: 30px 22px; }
  .article-hero { height: 260px; }
}