/* =========================================================
   逐西研学 · 共用样式
   参照浸思研学设计体系：青绿 + 金色 + 米白
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --green: #2d6a4f; --green-light: #40916c; --green-dark: #1b4332;
  --green-pale: #e8f0e9; --gold: #b8860b; --gold-light: #f5e6c8;
  --cream: #faf7f2; --cream-dark: #f0ece5;
  --text: #1a1a2e; --text-mid: #4a4a5a; --text-light: #6b6b7a;
  --white: #fff; --radius: 10px; --radius-lg: 20px;
}
html { scroll-behavior: smooth; }
body {
  font-family: 'DM Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text); background: var(--cream); line-height: 1.75;
  overflow-x: hidden;
}
h1, h2, h3, h4 {
  font-family: 'Noto Serif SC', serif; font-weight: 700; line-height: 1.25;
  letter-spacing: -0.01em;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 28px; }
.section { padding: clamp(60px, 10vw, 120px) 0; }
.section-compact { padding: clamp(40px, 6vw, 80px) 0; }
.section-title { font-size: clamp(1.5rem, 4vw, 2.4rem); margin-bottom: 12px; color: var(--green); }
.section-subtitle { color: var(--text-mid); font-size: 1.05rem; margin-bottom: 48px; letter-spacing: 0.3px; max-width: 640px; }

/* ===== 导航 ===== */
nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: var(--cream); border-bottom: 1px solid rgba(0,0,0,0.05); }
nav .container { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-family: 'Noto Serif SC', serif; font-weight: 700; font-size: 1.25rem; color: var(--green-dark); }
.nav-logo img { height: 38px; }
.nav-links { display: flex; gap: 20px; align-items: center; }
.nav-links a { font-size: 0.88rem; font-weight: 500; color: var(--text-mid); transition: color 0.2s; position: relative; }
.nav-links a:hover { color: var(--green); }
.nav-links a.active { color: var(--green); font-weight: 600; }
.nav-cta { background: var(--green); color: var(--white) !important; padding: 8px 18px; border-radius: 6px; font-weight: 600 !important; }
.nav-cta:hover { background: var(--green-light) !important; color: var(--white) !important; }
.nav-phone { color: var(--green) !important; font-weight: 700 !important; font-size: 0.9rem; white-space: nowrap; }
.nav-phone:hover { color: var(--green-dark) !important; }
.nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; color: var(--green); }
.dropdown { position: relative; }
.dropdown-menu { display: none; position: absolute; top: 100%; left: 50%; transform: translateX(-50%); background: var(--white); border-radius: 8px; box-shadow: 0 8px 32px rgba(0,0,0,0.1); padding: 8px 0; min-width: 150px; z-index: 100; }
.dropdown-menu a { display: block; padding: 8px 20px; font-size: 0.85rem; color: var(--text-mid); white-space: nowrap; }
.dropdown-menu a:hover { background: var(--green-pale); color: var(--green); }
.dropdown:hover .dropdown-menu { display: block; }

/* ===== Hero ===== */
.hero { min-height: 100vh; padding-top: 68px; position: relative; background: var(--cream); overflow: hidden; }
.hero .container { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: clamp(40px, 8vw, 80px); align-items: center; min-height: calc(100vh - 68px); position: relative; z-index: 1; }
.hero::after { content: ''; position: absolute; right: -10%; top: 0; bottom: 0; width: 45%; background: linear-gradient(160deg, var(--green-pale) 0%, #edf5ed 60%, transparent 100%); transform: skewX(-6deg); }
.hero-tag { display: inline-block; color: var(--green); padding: 6px 0; font-size: 0.85rem; font-weight: 600; margin-bottom: 16px; letter-spacing: 3px; text-transform: uppercase; border-bottom: 2px solid var(--green); }
.hero h1 { font-size: clamp(2rem, 5.5vw, 3.6rem); margin-bottom: 20px; }
.hero h1 em { font-style: normal; color: var(--green); }
.hero p { font-size: 1.08rem; color: var(--text-mid); margin-bottom: 36px; max-width: 520px; line-height: 1.8; }
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 32px; border-radius: 6px; font-weight: 600; font-size: 0.93rem; transition: all 0.25s; cursor: pointer; border: none; font-family: inherit; }
.btn-primary { background: var(--green); color: var(--white); }
.btn-primary:hover { background: var(--green-dark); transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--green); border: 1.5px solid var(--green); }
.btn-outline:hover { background: var(--green); color: var(--white); transform: translateY(-2px); }
.hero-visual { position: relative; z-index: 1; }
.hero-img-frame { border-radius: var(--radius-lg); overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,0.08); }
.hero-img-frame img { width: 100%; height: auto; display: block; }
.hero-float-tag { position: absolute; bottom: -12px; left: -16px; background: var(--white); padding: 10px 20px; border-radius: 8px; font-size: 0.82rem; font-weight: 600; color: var(--green); box-shadow: 0 6px 24px rgba(0,0,0,0.06); }

/* ===== 数据条 ===== */
.stats-strip { background: var(--green-dark); color: var(--cream); padding: clamp(48px, 6vw, 80px) 0; }
.stats-strip .container { display: flex; justify-content: space-around; text-align: center; flex-wrap: wrap; gap: 24px; }
.stat-item { flex: 1; min-width: 120px; }
.stat-num { font-size: clamp(1.4rem, 3.4vw, 2.2rem); font-weight: 800; line-height: 1; font-family: 'Noto Serif SC', serif; }
.stat-label { font-size: 0.8rem; opacity: 0.7; margin-top: 8px; letter-spacing: 1px; }

/* ===== 业务板块 ===== */
.biz-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.biz-card { background: var(--white); border-radius: var(--radius-lg); padding: 40px 36px; transition: all 0.3s; position: relative; overflow: hidden; display: block; }
.biz-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--green); }
.biz-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,0.06); }
.biz-card h3 { font-size: 1.1rem; margin-bottom: 8px; color: var(--green); }
.biz-card p { font-size: 0.85rem; color: var(--text-light); line-height: 1.7; margin-bottom: 16px; }
.biz-link { font-size: 0.8rem; font-weight: 600; color: var(--green); display: inline-flex; align-items: center; gap: 4px; }
.biz-card:hover .biz-link { gap: 8px; }

/* ===== 为什么选择 ===== */
.features-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--green-pale); }
.feat-cell { background: var(--cream); padding: 48px 36px; text-align: left; }
.feat-cell .feat-num { font-family: 'Noto Serif SC', serif; font-size: 2.4rem; color: var(--green); margin-bottom: 8px; line-height: 1; }
.feat-cell h3 { font-size: 1.05rem; margin-bottom: 8px; }
.feat-cell p { font-size: 0.85rem; color: var(--text-light); line-height: 1.7; }

/* ===== 案例 ===== */
.case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.case-item { background: var(--cream); border-radius: var(--radius); padding: 28px 32px; transition: all 0.3s; display: block; border: 1px solid var(--cream-dark); }
.case-item:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,0.06); border-color: var(--green-pale); }
.case-tag { display: inline-block; font-size: 0.68rem; font-weight: 600; padding: 2px 10px; border-radius: 4px; margin-bottom: 8px; background: var(--green-pale); color: var(--green); }
.case-item h4 { font-size: 0.95rem; margin-bottom: 4px; }
.case-item p { font-size: 0.82rem; color: var(--text-light); }

/* ===== 照片墙 ===== */
.photo-wall { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.photo-wall .ph { aspect-ratio: 1; border-radius: 6px; overflow: hidden; }
.photo-wall img { width: 100%; height: 100%; object-fit: cover; }

/* ===== 联合运营 ===== */
.partner-tags { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; max-width: 720px; margin: 0 auto; }
.partner-tag { background: var(--cream-dark); padding: 7px 20px; border-radius: 6px; font-size: 0.88rem; font-weight: 500; color: var(--text-mid); transition: all 0.2s; }
.partner-tag:hover { background: var(--green-pale); color: var(--green); }
.btn-gold { background: var(--gold); color: #fff; padding: 10px 26px; border-radius: 8px; }

/* ===== 核心理念 ===== */
.explain-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.explain-card { background: var(--white); border-radius: var(--radius-lg); padding: 40px 36px; border: 1px solid rgba(0,0,0,0.04); transition: all 0.3s; }
.explain-card:hover { box-shadow: 0 8px 24px rgba(45,106,79,0.06); }
.explain-card .ec-icon { font-size: 1.8rem; margin-bottom: 12px; }
.explain-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.explain-card p { font-size: 0.84rem; color: var(--text-light); line-height: 1.55; margin-bottom: 8px; }
.explain-card ul { padding-left: 16px; }
.explain-card li { font-size: 0.8rem; color: var(--text-light); margin-bottom: 3px; line-height: 1.5; }
.explain-card li strong { color: var(--text); }
.series-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.series-tag { font-size: 0.72rem; padding: 4px 10px; background: var(--green-pale); color: var(--green); border-radius: 4px; font-weight: 500; }

/* ===== 资讯 ===== */
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.blog-card { background: var(--white); border-radius: var(--radius-lg); overflow: hidden; border: 1px solid rgba(0,0,0,0.04); transition: all 0.3s; }
.blog-card:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(45,106,79,0.08); }
.blog-card .blog-body { padding: 24px; }
.blog-card .blog-date { font-size: 0.72rem; color: var(--text-light); margin-bottom: 6px; }
.blog-card h4 { font-size: 0.95rem; margin-bottom: 6px; line-height: 1.35; }
.blog-card p { font-size: 0.8rem; color: var(--text-light); line-height: 1.5; }
.blog-more { text-align: center; margin-top: 24px; }

/* ===== CTA ===== */
.cta-block { background: var(--green); color: var(--white); text-align: center; padding: clamp(60px, 10vw, 100px) 0; }
.cta-block h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); margin-bottom: 12px; }
.cta-block p { font-size: 1rem; opacity: 0.8; margin-bottom: 32px; }
.btn-white { background: var(--white); color: var(--green); padding: 14px 40px; border-radius: 6px; font-weight: 700; font-size: 0.95rem; display: inline-block; transition: all 0.25s; }
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.15); }

/* ===== 页脚 ===== */
footer { background: #1a1a2e; color: rgba(255,255,255,0.65); padding: 56px 0 0; font-size: 0.85rem; }
footer .container { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
footer h4 { color: var(--white); font-size: 0.95rem; margin-bottom: 16px; font-family: 'Noto Serif SC', serif; }
footer p { line-height: 2.2; }
footer a { color: rgba(255,255,255,0.65); }
footer a:hover { color: var(--gold); }
footer .copyright { grid-column: 1 / -1; text-align: center; padding: 28px 0; margin-top: 40px; border-top: 1px solid rgba(255,255,255,0.08); font-size: 0.78rem; }

/* ===== 弹窗表单 ===== */
.modal-overlay { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.45); z-index: 2000; align-items: center; justify-content: center; }
.modal-overlay.show { display: flex; }
.modal { background: var(--white); border-radius: 12px; padding: 44px 36px; max-width: 500px; width: 90%; position: relative; max-height: 90vh; overflow-y: auto; }
.modal-close { position: absolute; top: 14px; right: 18px; background: none; border: none; font-size: 1.4rem; cursor: pointer; color: #999; }
.modal h2 { font-size: 1.5rem; margin-bottom: 6px; }
.modal p { color: var(--text-light); margin-bottom: 24px; font-size: 0.9rem; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.85rem; font-weight: 500; margin-bottom: 5px; color: var(--text-mid); }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 11px 14px; border: 1.5px solid #e0e0e0; border-radius: 6px; font-size: 0.9rem; font-family: inherit; transition: border-color 0.2s; background: var(--cream); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--green); background: var(--white); }
.form-group textarea { resize: vertical; min-height: 80px; }
.form-submit { width: 100%; padding: 13px; background: var(--green); color: var(--white); border: none; border-radius: 6px; font-size: 0.95rem; font-weight: 600; cursor: pointer; transition: background 0.2s; font-family: inherit; margin-top: 4px; }
.form-submit:hover { background: var(--green-dark); }

/* ===== 内页通用 ===== */
.page-hero { padding: 150px 0 60px; background: var(--cream); position: relative; overflow: hidden; }
.page-hero::after { content: ''; position: absolute; right: -10%; top: 0; bottom: 0; width: 40%; background: linear-gradient(160deg, var(--green-pale) 0%, #edf5ed 60%, transparent 100%); transform: skewX(-6deg); z-index: 0; }
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(1.8rem, 5vw, 3rem); color: var(--green-dark); margin-bottom: 12px; }
.page-hero .crumb { font-size: 0.82rem; color: var(--text-light); }
.page-hero .crumb a { color: var(--green); }
.prose { max-width: 860px; margin: 0 auto; font-size: 0.95rem; color: var(--text-mid); line-height: 1.9; }
.prose h2 { color: var(--green-dark); margin: 32px 0 12px; font-size: 1.5rem; }
.prose h3 { color: var(--green); margin: 24px 0 8px; font-size: 1.15rem; }
.prose p { margin-bottom: 14px; }
.prose ul { padding-left: 20px; margin-bottom: 14px; }
.prose li { margin-bottom: 6px; }
.prose strong { color: var(--text); }

/* ===== 联系页 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.contact-card { background: var(--white); border-radius: var(--radius-lg); padding: 32px; border: 1px solid rgba(0,0,0,0.04); }
.contact-card h3 { color: var(--green); margin-bottom: 16px; }
.contact-card .row { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 14px; font-size: 0.9rem; }
.contact-card .row .ic { color: var(--green); flex-shrink: 0; }
.qr-box { text-align: center; }
.qr-box img { width: 160px; height: 160px; border-radius: 10px; }

/* ===== FAQ ===== */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item { background: var(--white); border-radius: var(--radius); padding: 24px 28px; margin-bottom: 16px; border: 1px solid rgba(0,0,0,0.04); }
.faq-item h3 { font-size: 1rem; color: var(--green-dark); margin-bottom: 8px; }
.faq-item p { font-size: 0.88rem; color: var(--text-mid); }

/* ===== 业务详情页 ===== */
.biz-detail-grid { display: grid; grid-template-columns: 260px 1fr; gap: 40px; align-items: start; }
.biz-sidebar { position: sticky; top: 90px; }
.biz-sidebar a { display: block; padding: 12px 18px; border-radius: 8px; font-size: 0.9rem; color: var(--text-mid); margin-bottom: 4px; }
.biz-sidebar a:hover { background: var(--green-pale); color: var(--green); }
.biz-sidebar a.active { background: var(--green); color: var(--white); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero::after { display: none; }
  .biz-grid { grid-template-columns: repeat(2, 1fr); }
  .features-row { grid-template-columns: repeat(2, 1fr); }
  footer .container { grid-template-columns: 1fr 1fr; gap: 32px; }
  .biz-detail-grid { grid-template-columns: 1fr; }
  .biz-sidebar { position: static; display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
}
@media (max-width: 768px) {
  nav .container { height: 56px; }
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 56px; left: 0; right: 0; background: var(--cream); padding: 16px 24px; border-bottom: 1px solid rgba(0,0,0,0.05); gap: 12px; }
  .nav-toggle { display: block; }
  .dropdown-menu { position: static; box-shadow: none; padding: 0 0 0 16px; }
  .hero { min-height: auto; padding: 80px 0 40px; }
  .hero h1 { font-size: clamp(1.6rem, 8vw, 2.4rem); }
  .hero p { font-size: 0.95rem; }
  .hero-btns { flex-direction: column; }
  .hero-btns .btn { text-align: center; justify-content: center; }
  .hero-visual { display: none; }
  .hero-float-tag { display: none; }
  .section { padding: 60px 0; }
  .section-title { font-size: 1.4rem; }
  .section-subtitle { font-size: 0.9rem; margin-bottom: 32px; }
  .container { padding: 0 20px; }
  .biz-grid { grid-template-columns: 1fr; }
  .features-row { grid-template-columns: 1fr 1fr; gap: 0; }
  .feat-cell { padding: 28px 20px; }
  .feat-cell .feat-num { font-size: 1.8rem; }
  .stats-strip .container { flex-direction: column; gap: 16px; }
  .stat-num { font-size: 1.8rem; }
  .case-grid { grid-template-columns: 1fr; }
  .explain-grid { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .page-hero { padding: 120px 0 48px; }
  footer { padding: 40px 0 0; }
  footer .container { grid-template-columns: 1fr 1fr; gap: 28px; }
  footer .copyright { margin-top: 28px; padding-top: 20px; }
  .modal { padding: 24px 20px; max-width: 100%; border-radius: 12px 12px 0 0; }
  .modal-overlay { align-items: flex-end; }
}
@media (max-width: 480px) {
  .features-row { grid-template-columns: 1fr; }
  footer .container { grid-template-columns: 1fr; }
  .container { padding: 0 16px; }
}