/* 颜色与基础变量 */
:root {
  --green-900: #0b5a49;
  --green-600: #167a64;
  --green-100: #e6f3ef;
  --yellow-500: #f4c842;
  --yellow-300: #ffe082;
  --text-900: #222;
  --text-600: #4b5563;
  --bg: #ffffff;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Noto Sans SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  color: var(--text-900);
  background: var(--bg);
}

.container { width: min(1100px, 92vw); margin: 0 auto; }

/* 头部导航 */
.site-header { position: sticky; top: 0; z-index: 20; background: #fff; box-shadow: 0 2px 8px rgba(0,0,0,.06); }
.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.logo { font-weight: 700; color: var(--green-900); letter-spacing: .5px; }
.nav a { margin-left: 20px; text-decoration: none; color: var(--text-600); padding: 8px 10px; border-radius: 8px; }
.nav a:hover { background: var(--green-100); color: var(--green-900); }

/* 英雄区 */
.hero { padding: 72px 0 36px; background: radial-gradient(1200px 380px at 50% -80px, var(--yellow-300), transparent 70%); }
.hero-inner { text-align: center; }
.hero h1 { font-size: clamp(24px, 5vw, 44px); margin: 0; }
.hero .accent { color: #ef6c00; margin-right: 6px; }
.hero .sub { color: var(--text-600); margin: 12px 0 26px; }

.brands-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 22px; }
.brand-card { background: #fff; border: 1px solid #eee; border-radius: 16px; padding: 18px 12px; text-align: center; box-shadow: 0 6px 14px rgba(0,0,0,.06); transition: transform .2s ease, box-shadow .2s ease; }
.brand-card:hover { transform: translateY(-4px); box-shadow: 0 10px 18px rgba(0,0,0,.08); }
.brand-icon { font-size: 0; line-height: 1; }
.icon-img { width: 56px; height: 56px; object-fit: contain; display: inline-block; }
.brand-name { margin-top: 8px; font-weight: 600; color: var(--green-900); }

/* 通用版块 */
.section { padding: 64px 0; }
.section-title { position: relative; display: inline-block; margin: 0 0 16px; font-size: 28px; color: var(--green-900); }
.section-title::after { content: ''; display: block; width: 48px; height: 4px; background: var(--yellow-500); border-radius: 4px; margin-top: 8px; }
.section-striped { background: linear-gradient(180deg, var(--green-100) 0, #fff 100%); }
.center { text-align: center; color: var(--text-600); }

.two-col { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.icon-box { width: 48px; height: 48px; border-radius: 12px; background: var(--yellow-300); display: inline-flex; align-items: center; justify-content: center; font-size: 24px; margin-bottom: 8px; }
.two-col p { color: var(--text-600); line-height: 1.8; }

/* 成长中心 */
.section-green { background: linear-gradient(180deg, #0f684e 0, #0b5a49 100%); color: #fff; }
.section-green .section-title { color: #fff; }
.section-green .section-title::after { background: #fff; opacity: .6; }
.growth-wrap { display: grid; grid-template-columns: 340px 1fr; gap: 32px; align-items: center; }
.growth-card { background: rgba(255,255,255,.12); border-radius: 16px; padding: 20px; }
.ring-notebook { position: relative; height: 280px; border-radius: 12px; background: #fff; box-shadow: 0 10px 24px rgba(0,0,0,.2); }
.rings { position: absolute; top: -10px; left: 18px; right: 18px; height: 24px; background: repeating-linear-gradient(90deg, #bbb, #bbb 12px, transparent 12px, transparent 22px); border-radius: 14px; }
.page { position: absolute; inset: 18px; background: #f9fafb; border-radius: 8px; padding: 16px; }
.bar { height: 18px; background: #c8e6c9; margin: 10px 0; border-radius: 6px; }
.growth-text p { line-height: 1.9; }
.growth-text strong { color: #ffd54f; }

/* 品牌发展 */
.campus-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 16px; }
.campus { border: 1px solid #eee; border-radius: 12px; padding: 16px; box-shadow: 0 6px 14px rgba(0,0,0,.04); }
.campus h3 { margin: 0 0 10px; color: var(--green-600); }
.campus ul { padding-left: 18px; margin: 0; color: var(--text-600); line-height: 1.8; }

/* 蜗言书屋 */
.section-snail { background: #fff7e6; }
.snail-header { display: flex; align-items: center; gap: 10px; }
.snail-mark { font-size: 36px; }
.highlight { color: #e53935; font-weight: 700; }
.btn { display: inline-block; margin-top: 16px; background: var(--green-600); color: #fff; text-decoration: none; padding: 10px 16px; border-radius: 10px; box-shadow: 0 4px 10px rgba(0,0,0,.12); }
.btn:hover { background: var(--green-900); }
.snail-board { position: relative; height: 240px; border-radius: 12px; background: #fff; box-shadow: 0 8px 18px rgba(0,0,0,.12); }
.snail-board .clip { position: absolute; left: 50%; transform: translateX(-50%); top: -16px; width: 68px; height: 22px; border-radius: 10px; background: #ffd54f; }
.snail-board .photo { position: absolute; inset: 16px; border-radius: 8px; background: linear-gradient(135deg, #ffe082 0, #fff3cd 60%, #fff 100%); }

/* 页脚 */
.site-footer { background: #f8fafc; padding: 28px 0; border-top: 1px solid #eee; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; }
.contact p { margin: 4px 0; color: var(--text-600); }

/* 响应式 */
@media (max-width: 900px) {
  .brands-grid { grid-template-columns: repeat(2, 1fr); }
  .growth-wrap { grid-template-columns: 1fr; }
  .campus-grid { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
}

/* 且风儿童美育 */
.section-art { background: #fff; }
.art-wrap { display: grid; grid-template-columns: 360px 1fr; gap: 24px; align-items: center; }
.art-left { position: relative; height: 320px; }
.art-bamboo { position: absolute; inset: 0; background:
  radial-gradient(320px 320px at 50% 50%, #f7e1e3 0%, transparent 68%),
  linear-gradient(90deg, transparent 46%, #a5d6a7 46%, #a5d6a7 54%, transparent 54%),
  linear-gradient(90deg, transparent 46%, #81c784 46%, #81c784 54%, transparent 54%);
  border-radius: 50%; filter: blur(.4px);
}
.art-logo { position: absolute; left: 16px; top: 16px; background: #fff; color: #c62828; border: 1px dashed #ffccbc; padding: 8px 12px; border-radius: 10px; font-weight: 700; }
.art-right p { color: var(--text-600); line-height: 1.9; }

/* 理念版块 */
.section-concept { background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="800" height="600"><rect width="800" height="600" fill="%23f2efe9"/></svg>') center/cover no-repeat; }
.concept-grid { display: grid; grid-template-columns: 340px 1fr; gap: 24px; align-items: center; }
.scroll-card { position: relative; height: 300px; }
.scroll-top, .scroll-bottom { height: 22px; border-radius: 14px; background: #c49a6c; }
.scroll-body { height: calc(100% - 48px); margin: 4px 0; background: #fff; border: 1px solid #eee; box-shadow: 0 8px 16px rgba(0,0,0,.08) inset; }
.rings-hero { position: relative; height: 320px; }
.ring { position: absolute; border-radius: 50%; border: 24px solid #f59e0b; opacity: .8; }
.ring-large { width: 360px; height: 360px; left: 40px; top: -20px; }
.ring-small { width: 240px; height: 240px; left: 320px; top: 40px; border-width: 20px; }
.ring-text { position: absolute; left: 130px; top: 120px; font-size: 26px; color: #e57373; font-weight: 700; text-shadow: 0 2px #fff; }
.bubble { position: absolute; width: 220px; height: 220px; border-radius: 50%; background: #fff; box-shadow: 0 10px 22px rgba(0,0,0,.12); display: flex; flex-direction: column; align-items: center; justify-content: center; }
.bubble-left { left: 40px; top: 200px; }
.bubble-right { left: 420px; top: 210px; }
.bubble-title { font-weight: 800; color: #1f6e66; font-size: 20px; }
.bubble-sub { color: #1f6e66; margin-top: 6px; }

/* 小步原版绘本馆 */
.section-stepbook { position: relative; background: #f5fffb; overflow: hidden; }
.stepbook-wrap { position: relative; min-height: 360px; display: grid; grid-template-columns: 240px 260px 1fr; gap: 20px; align-items: center; }
.worm-mark { font-size: 72px; }
.photo-card { height: 200px; border-radius: 8px; background: #fff; box-shadow: 0 10px 18px rgba(0,0,0,.12); transform: rotate(-6deg); position: relative; }
.photo-angle { position: absolute; inset: 16px; border-radius: 6px; background: linear-gradient(135deg, #e0f2f1 0, #f1f8e9 60%, #fff 100%); }
.stepbook-text p { color: var(--text-600); line-height: 1.9; }

@media (max-width: 900px) {
  .art-wrap { grid-template-columns: 1fr; height: auto; }
  .concept-grid { grid-template-columns: 1fr; }
  .rings-hero { height: 380px; }
  .stepbook-wrap { grid-template-columns: 1fr; }
}