/* ============================================================
   BALLBOUNCE® DESIGN SYSTEM — "KINETIC PLAYGROUND"
   Awwwards-inspired · Cream + Coral + Teal + Mustard
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Nunito:ital,wght@0,400;0,600;0,700;0,800;0,900;1,400&display=swap');
@import url('https://fonts.googleapis.com/css2?family=ZCOOL+KuaiLe&display=swap');

:root {
  --cream: #FFF9F0;
  --cream-deep: #FFF0DD;
  --cream-card: #FFFFFF;
  --coral: #FF6B35;
  --coral-dark: #E8541F;
  --coral-soft: #FFE0D0;
  --teal: #00A896;
  --teal-dark: #00897B;
  --teal-soft: #D5F5F2;
  --mustard: #FFD166;
  --mustard-soft: #FFF4D6;
  --ink: #2D3436;
  --ink-soft: #636E72;
  --line: #E8DFD3;
  --shadow-sm: 0 2px 8px rgba(45, 52, 54, 0.06);
  --shadow-md: 0 8px 30px rgba(255, 107, 53, 0.14);
  --shadow-lg: 0 20px 60px rgba(255, 107, 53, 0.22);
  --radius-pill: 999px;
  --radius-lg: 28px;
  --radius-md: 18px;
  --bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Nunito', system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background: var(--cream);
  color: var(--ink);
  line-height: 1.6;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255, 209, 102, 0.13) 0%, transparent 25%),
    radial-gradient(circle at 80% 70%, rgba(0, 168, 150, 0.10) 0%, transparent 30%),
    radial-gradient(circle at 50% 90%, rgba(255, 107, 53, 0.08) 0%, transparent 25%);
  background-attachment: fixed;
}

::selection { background: var(--coral); color: #fff; }

/* ========== 核心布局 ========== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.section { padding: 96px 0; position: relative; }

.section:nth-child(even) {
  background: linear-gradient(180deg, var(--cream-deep), #FFF6EB);
}

.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 68px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--coral), var(--mustard), var(--teal));
  opacity: 0.6;
}

/* ========== 导航 ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 249, 240, 0.88);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px dashed var(--line);
  transition: box-shadow 0.3s ease;
}

.site-header.scrolled { box-shadow: 0 4px 30px rgba(255, 107, 53, 0.12); }

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.35rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.5px;
  position: relative;
  z-index: 2;
}

.logo-icon {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  background: linear-gradient(135deg, var(--coral), #FF9A5C);
  box-shadow: 0 4px 14px rgba(255, 107, 53, 0.35);
  position: relative;
  overflow: visible;
  animation: logo-bounce 2.4s var(--bounce) infinite;
}

.logo-icon::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.7);
}

@keyframes logo-bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-5px) rotate(-8deg); }
  60% { transform: translateY(-2px) rotate(4deg); }
}

.logo-text-highlight {
  color: var(--coral);
  font-weight: 900;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink-soft);
  letter-spacing: 0.3px;
  transition: all 0.25s ease;
  position: relative;
  padding: 6px 0;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--coral), var(--mustard));
  transition: width 0.3s var(--bounce);
}

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

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

.nav-cta {
  padding: 10px 26px;
  border-radius: var(--radius-pill);
  color: #fff !important;
  font-weight: 800;
  background: linear-gradient(135deg, var(--coral), #FF8E55);
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.4);
  transition: all 0.3s var(--bounce) !important;
}

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

.nav-cta:hover {
  color: #fff !important;
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.5);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 2px solid var(--line);
  border-radius: 50%;
  background: var(--cream);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--ink);
  transition: all 0.3s ease;
  z-index: 1001;
}

.menu-toggle:hover {
  border-color: var(--coral);
  color: var(--coral);
  transform: rotate(90deg);
}

/* ========== Hero ========== */
.hero {
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding-top: 76px;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 15% 20%, rgba(255, 209, 102, 0.22) 0%, transparent 40%),
    radial-gradient(ellipse at 85% 75%, rgba(0, 168, 150, 0.18) 0%, transparent 35%),
    linear-gradient(180deg, var(--cream) 0%, #FFF3E6 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: 12%;
  right: 5%;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #fff 8%, transparent 9%);
  background-size: 24px 24px;
  border: 2px dashed rgba(255, 107, 53, 0.3);
  animation: spin 30s linear infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 8%;
  left: 6%;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--teal-soft), transparent 70%);
  border: 3px dotted rgba(0, 168, 150, 0.4);
  animation: float 5s ease-in-out infinite;
}

.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 800;
  padding: 8px 20px;
  border-radius: var(--radius-pill);
  margin-bottom: 24px;
  background: var(--teal-soft);
  color: var(--teal-dark);
  border: 1px solid rgba(0, 168, 150, 0.2);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.hero-eyebrow::before {
  content: '⚡';
  font-size: 0.9rem;
  animation: pulse 1.5s infinite;
}

.hero h1 {
  font-size: 4.2rem;
  font-weight: 900;
  line-height: 1.12;
  margin-bottom: 24px;
  letter-spacing: -2px;
  background: linear-gradient(135deg, var(--ink) 40%, var(--coral) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, var(--coral), var(--mustard));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.hero h1 .highlight::after {
  content: '🟠';
  font-size: 2rem;
  position: absolute;
  top: -18px;
  right: -32px;
  animation: spin 8s linear infinite;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.75;
  max-width: 560px;
  margin-bottom: 36px;
  color: var(--ink-soft);
  font-weight: 400;
  line-height: 1.8;
}

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

.hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, var(--coral-soft), var(--mustard-soft));
}

.hero-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg, rgba(255,107,53,0.1) 25%, transparent 25%, transparent 50%, rgba(255,107,53,0.1) 50%, rgba(255,107,53,0.1) 75%, transparent 75%);
  background-size: 32px 32px;
  pointer-events: none;
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
  filter: saturate(1.1);
}

.hero-image::after {
  content: '🟠 🔵';
  position: absolute;
  bottom: -18px;
  left: -18px;
  font-size: 3rem;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.15));
  animation: float 4s ease-in-out infinite;
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--radius-pill);
  font-weight: 800;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.35s var(--bounce);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.2);
  transform: translateX(-100%) skewX(-20deg);
  transition: transform 0.5s ease;
}

.btn:hover::before {
  transform: translateX(100%) skewX(-20deg);
}

.btn-primary {
  background: linear-gradient(135deg, var(--coral), #FF8E55);
  color: #fff;
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 30px rgba(255, 107, 53, 0.5);
}

.btn-primary:active {
  transform: translateY(-1px) scale(0.98);
}

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

.btn-outline:hover {
  background: var(--teal);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 168, 150, 0.3);
}

/* ========== 标签/标题 ========== */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 3px;
  margin-bottom: 14px;
  color: var(--coral);
  text-transform: uppercase;
  background: var(--coral-soft);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
}

.section-label::before {
  content: '●';
  font-size: 0.55rem;
  animation: pulse 2s infinite;
}

.section-title {
  font-size: 2.6rem;
  font-weight: 900;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
  color: var(--ink);
  line-height: 1.2;
}

.section-desc {
  max-width: 600px;
  opacity: 0.7;
  margin-bottom: 48px;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

/* ========== 卡片网格 ========== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.category-card {
  border-radius: 24px;
  padding: 32px;
  background: var(--cream-card);
  border: 1px solid var(--line);
  transition: all 0.4s var(--bounce);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--coral), var(--mustard));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--bounce);
}

.category-card:hover {
  transform: translateY(-6px) rotate(0.5deg);
  box-shadow: 0 16px 40px rgba(255, 107, 53, 0.16);
  border-color: transparent;
}

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

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.5rem;
  background: var(--teal-soft);
  transition: all 0.4s var(--bounce);
}

.category-card:nth-child(2) .card-icon { background: var(--coral-soft); }
.category-card:nth-child(3) .card-icon { background: var(--mustard-soft); }
.category-card:nth-child(4) .card-icon { background: #E8F0FE; }

.category-card:hover .card-icon {
  transform: scale(1.15) rotate(-8deg);
}

.category-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.category-card p {
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.6;
  margin-bottom: 16px;
}

.card-link {
  font-weight: 700;
  font-size: 0.86rem;
  text-decoration: none;
  color: var(--coral);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s ease;
}

.card-link:hover { gap: 12px; }

.card-link::after {
  content: '→';
  transition: transform 0.3s ease;
}

/* ========== 特性块 ========== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-image {
  border-radius: 36px;
  overflow: hidden;
  position: relative;
  background: linear-gradient(135deg, var(--teal-soft), var(--mustard-soft));
  box-shadow: 0 12px 40px rgba(0, 168, 150, 0.15);
}

.feature-image::before {
  content: '◐';
  font-size: 7rem;
  position: absolute;
  top: -20px;
  right: -10px;
  color: rgba(255, 107, 53, 0.15);
  animation: spin 20s linear infinite;
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.6s ease;
}

.feature-image:hover img { transform: scale(1.05); }

.feature-text {
  padding: 20px 0;
}

.feature-text h3 {
  font-size: 1.8rem;
  font-weight: 900;
  margin-bottom: 16px;
  line-height: 1.3;
}

.feature-text .section-label {
  margin-bottom: 20px;
}

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

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
  border-bottom: 1px dashed var(--line);
}

.feature-list li:last-child { border-bottom: none; }

.feature-list li::before {
  content: '✓';
  font-weight: 900;
  width: 28px;
  height: 28px;
  background: var(--teal);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  box-shadow: 0 3px 8px rgba(0, 168, 150, 0.3);
}

/* ========== 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: 100% / 80%;
  background: var(--cream-card);
  border: 1px dashed var(--line);
  transition: all 0.4s var(--bounce);
  position: relative;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 8px;
  right: 8px;
  bottom: 8px;
  border-radius: 100% / 80%;
  border: 1px solid rgba(0, 168, 150, 0.15);
  pointer-events: none;
}

.stat-item:hover {
  transform: translateY(-4px) scale(1.03);
  border-color: var(--coral);
  box-shadow: var(--shadow-md);
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 900;
  color: var(--coral);
  line-height: 1;
  font-family: 'ZCOOL KuaiLe', 'Nunito', cursive;
}

.stat-label {
  font-size: 0.85rem;
  opacity: 0.6;
  margin-top: 8px;
  font-weight: 600;
}

/* ========== 内容墙 ========== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: 24px;
  overflow: hidden;
  background: var(--cream-card);
  border: 1px solid var(--line);
  transition: all 0.4s var(--bounce);
}

.content-wall-item:hover {
  transform: translateY(-6px) rotate(-0.5deg);
  box-shadow: 0 16px 40px rgba(255, 107, 53, 0.15);
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.content-wall-item:hover img { transform: scale(1.08); }

.content-wall-body {
  padding: 24px;
}

.content-wall-body h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.content-wall-body p {
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.6;
}

.content-wall-body .tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  background: var(--teal-soft);
  color: var(--teal-dark);
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--line);
  border-radius: 20px;
  margin-bottom: 14px;
  overflow: hidden;
  cursor: pointer;
  background: var(--cream-card);
  transition: all 0.3s var(--bounce);
  box-shadow: 0 2px 8px rgba(0,0,0,0.02);
}

.faq-item:hover {
  border-color: rgba(255, 107, 53, 0.4);
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.08);
}

.faq-item.open {
  border-color: var(--coral);
  box-shadow: 0 8px 30px rgba(255, 107, 53, 0.12);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 800;
  font-size: 1.02rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--ink);
  transition: color 0.3s ease;
}

.faq-item.open .faq-question {
  color: var(--coral);
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 400;
  width: 32px;
  height: 32px;
  background: var(--cream-deep);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.4s var(--bounce);
  color: var(--ink-soft);
  flex-shrink: 0;
}

.faq-item.open .faq-question::after {
  content: '−';
  background: var(--coral);
  color: #fff;
  transform: rotate(180deg);
}

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  opacity: 0.7;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  padding-top: 16px;
  margin: 0 24px 20px;
  padding-left: 0;
  padding-right: 0;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeUp 0.4s ease;
}

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

/* ========== CTA横幅 ========== */
.cta-banner {
  padding: 72px 32px;
  text-align: center;
  border-radius: 36px;
  color: #fff;
  background:
    radial-gradient(circle at 88% 12%, rgba(255, 255, 255, 0.2) 0%, transparent 30%),
    radial-gradient(circle at 8% 85%, rgba(255, 209, 102, 0.3) 0%, transparent 25%),
    linear-gradient(135deg, var(--coral) 0%, #FF8A55 50%, var(--coral-dark) 100%);
  position: relative;
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(255, 107, 53, 0.4);
}

.cta-banner::before {
  content: '● ● ●';
  font-size: 4rem;
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  letter-spacing: 24px;
  opacity: 0.15;
  animation: pulse 3s infinite;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2.2rem;
  font-weight: 900;
  margin-bottom: 14px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.1);
}

.cta-banner p {
  max-width: 480px;
  margin: 0 auto 28px;
  opacity: 0.9;
  font-size: 1rem;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--coral);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
  font-size: 1rem;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
}

/* ========== 页脚 ========== */
.site-footer {
  padding: 64px 0 32px;
  background: var(--teal-soft);
  border-top: 2px solid rgba(0, 168, 150, 0.15);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 4px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--coral), var(--mustard), var(--teal));
}

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

.footer-brand {
  max-width: 300px;
}

.footer-brand .logo {
  font-size: 1.4rem;
  margin-bottom: 14px;
}

.footer-brand p {
  color: var(--ink-soft);
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--teal-dark);
  margin-bottom: 18px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  text-decoration: none;
  color: var(--ink-soft);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.25s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-col ul a::before {
  content: '›';
  font-weight: 900;
  color: var(--coral);
  transition: transform 0.3s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(0, 168, 150, 0.2);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--ink-soft);
}

.footer-bottom span {
  color: var(--coral);
  font-weight: 700;
}

/* ========== 工具类 ========== */
.text-accent {
  color: var(--coral);
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.7;
  color: var(--ink-soft);
  line-height: 1.8;
}

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

/* ========== 全局动画 ========== */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-16px) rotate(6deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.9); }
}

@keyframes bounceIn {
  0% { transform: scale(0.3); opacity: 0; }
  50% { transform: scale(1.05); }
  70% { transform: scale(0.9); }
  100% { transform: scale(1); opacity: 1; }
}

/* 自定义滚动条 */
::-webkit-scrollbar {
  width: 12px;
}

::-webkit-scrollbar-track {
  background: var(--cream);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--coral), var(--mustard));
  border-radius: var(--radius-pill);
  border: 3px solid var(--cream);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, var(--coral-dark), var(--coral));
}

/* 焦点可见性 */
:focus-visible {
  outline: 3px dashed var(--coral);
  outline-offset: 3px;
  border-radius: 4px;
}

/* 增加一些悬浮球的装饰背景 */
.cards-grid, .content-wall {
  position: relative;
}

/* Hero内双球背景装饰 */
.hero .ball-decor-1,
.hero .ball-decor-2 {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.hero .ball-decor-1 {
  top: 18%;
  right: 8%;
  width: 48px;
  height: 48px;
  background: linear-gradient(145deg, var(--coral), #FFB088);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.4);
  animation: float 3.5s ease-in-out infinite;
  z-index: 1;
}

.hero .ball-decor-2 {
  bottom: 14%;
  right: 22%;
  width: 32px;
  height: 32px;
  background: linear-gradient(145deg, var(--teal), #6CD5C9);
  box-shadow: 0 6px 18px rgba(0, 168, 150, 0.4);
  animation: float 4.5s ease-in-out 0.8s infinite;
  z-index: 1;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .hero h1 { font-size: 3.4rem; }
  .section-title { font-size: 2.2rem; }
  .feature-block { gap: 40px; }
}

@media (max-width: 768px) {
  .hero {
    min-height: auto;
    padding: 120px 0 60px;
    text-align: center;
  }

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

  .hero h1 { font-size: 2.8rem; }

  .hero p {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .feature-block { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .main-nav {
    display: none;
    position: fixed;
    top: 76px;
    left: 16px;
    right: 16px;
    background: rgba(255, 249, 240, 0.98);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    border-radius: 28px;
    box-shadow: 0 20px 60px rgba(45, 52, 54, 0.15);
    border: 1px solid var(--line);
    backdrop-filter: blur(20px);
  }
  .menu-toggle { display: flex; }
  .main-nav.open {
    display: flex;
    animation: fadeUp 0.3s ease;
  }
  .main-nav a { font-size: 1.05rem; }
  .nav-cta { margin-top: 12px; }
  .hero::before { display: none; }
  .hero::after { display: none; }
  .cta-banner { padding: 48px 20px; border-radius: 24px; }
  .cta-banner h2 { font-size: 1.8rem; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 2.2rem; }
  .section-title { font-size: 1.7rem; }
  .cards-grid, .content-wall, .stats-bar { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-buttons { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .stat-item { border-radius: 24px; }
  .stat-item::before { border-radius: 24px; }
  .section { padding: 60px 0; }
  .feature-block { gap: 28px; }
}