/* ============================================
   问鼎平台网址 — 问鼎云端，一触即达
   设计主题：温暖科技 · 陶土与鼠尾草
   配色：奶油白 + 陶土暖橙 + 鼠尾草绿 + 深棕
   Awwwards风格：有机形态 · 杂志排版 · 温暖自然
   ============================================ */

/* === 基础重置 === */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { 
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif; 
  overflow-x:hidden; 
  background:#FAF7F2; 
  color:#4A3125;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

/* === 核心布局 === */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }
.section { padding:80px 0; position:relative; }
.section:nth-child(even) { background:#F3EFE8; }

/* === 导航 — 固定顶部 === */
.site-header { 
  position:fixed; top:0; left:0; width:100%; z-index:1000; 
  background:rgba(250,247,242,0.92); 
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid #E8E0D5;
  transition:box-shadow 0.3s;
}
.site-header.scrolled { box-shadow:0 2px 24px rgba(198,123,92,0.08); }
.header-inner { 
  display:flex; align-items:center; justify-content:space-between; 
  height:68px; max-width:1200px; margin:0 auto; padding:0 24px; 
}
.logo { 
  display:flex; align-items:center; gap:10px; 
  font-weight:800; font-size:1.25rem; text-decoration:none; 
  color:#4A3125; letter-spacing:-0.3px;
  transition:opacity 0.2s;
}
.logo:hover { opacity:0.8; }
.logo-icon { 
  width:38px; height:38px; border-radius:10px; 
  display:flex; align-items:center; justify-content:center; 
  font-size:1.1rem; background:#C67B5C; color:#fff;
  font-weight:700;
}
.main-nav { display:flex; align-items:center; gap:28px; list-style:none; }
.main-nav a { 
  text-decoration:none; font-size:0.9rem; font-weight:500; 
  color:#4A3125; transition:color 0.2s; position:relative;
  padding:4px 0;
}
.main-nav a::after {
  content:''; position:absolute; bottom:-2px; left:0; width:0; height:2px;
  background:#C67B5C; border-radius:1px; transition:width 0.25s ease;
}
.main-nav a:hover { color:#C67B5C; }
.main-nav a:hover::after { width:100%; }
.nav-cta { 
  padding:9px 22px; border-radius:8px; 
  color:#fff!important; font-weight:600; 
  background:#C67B5C; 
  transition:all 0.25s;
  box-shadow:0 2px 10px rgba(198,123,92,0.25);
}
.nav-cta:hover { 
  background:#b56d4e; 
  box-shadow:0 4px 18px rgba(198,123,92,0.35);
  transform:translateY(-1px);
}
.nav-cta::after { display:none!important; }
.menu-toggle { 
  display:none; cursor:pointer; width:32px; height:24px;
  flex-direction:column; justify-content:space-between;
  background:none; border:none; padding:0; z-index:1001;
}
.menu-toggle span { 
  display:block; width:100%; height:2.5px; 
  background:#4A3125; border-radius:2px; transition:0.3s;
}
.menu-toggle.active span:nth-child(1) { transform:translateY(10px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity:0; }
.menu-toggle.active span:nth-child(3) { transform:translateY(-11px) rotate(-45deg); }

/* === 首页Hero === */
.hero { 
  min-height:75vh; display:flex; align-items:center; 
  padding-top:68px; position:relative;
  background:radial-gradient(ellipse at 30% 20%, rgba(198,123,92,0.06) 0%, transparent 60%),
             radial-gradient(ellipse at 70% 60%, rgba(139,168,136,0.05) 0%, transparent 55%);
}
.hero .container { 
  display:flex; align-items:center; gap:48px; 
  flex-wrap:wrap; width:100%;
}
.hero-content { max-width:620px; flex:1 1 400px; }
.hero-eyebrow { 
  display:inline-block; font-size:0.8rem; font-weight:700; 
  padding:5px 16px; border-radius:20px; margin-bottom:18px;
  background:#F0E6DE; color:#C67B5C; letter-spacing:1.5px;
  text-transform:uppercase;
}
.hero h1 { 
  font-size:3.4rem; line-height:1.15; margin-bottom:22px; 
  font-weight:800; color:#4A3125; letter-spacing:-0.8px;
}
.hero h1 .highlight { color:#C67B5C; position:relative; }
.hero p { 
  font-size:1.15rem; opacity:0.75; max-width:520px; 
  margin-bottom:36px; line-height:1.7; color:#5C4338;
}
.hero-buttons { display:flex; gap:16px; flex-wrap:wrap; }
.hero-image { 
  flex:1 1 380px; border-radius:16px; overflow:hidden;
  box-shadow:0 20px 60px rgba(198,123,92,0.12), 0 4px 16px rgba(0,0,0,0.04);
  border:1px solid #E8E0D5;
  transition:transform 0.3s, box-shadow 0.3s;
}
.hero-image:hover { 
  transform:translateY(-4px); 
  box-shadow:0 28px 72px rgba(198,123,92,0.16), 0 6px 20px rgba(0,0,0,0.05);
}
.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:8px; font-weight:600; 
  cursor:pointer; border:none; text-decoration:none; 
  transition:all 0.25s; font-size:0.95rem; letter-spacing:0.2px;
}
.btn-primary { 
  background:#C67B5C; color:#fff; 
  box-shadow:0 3px 14px rgba(198,123,92,0.28);
}
.btn-primary:hover { 
  background:#b56d4e; 
  box-shadow:0 6px 22px rgba(198,123,92,0.38);
  transform:translateY(-2px);
}
.btn-outline { 
  background:transparent; border:1.8px solid #C67B5C; color:#C67B5C; 
}
.btn-outline:hover { 
  background:#C67B5C; color:#fff; 
  box-shadow:0 4px 16px rgba(198,123,92,0.25);
  transform:translateY(-2px);
}

/* === 标签/标题 === */
.section-label { 
  display:inline-block; font-size:0.78rem; font-weight:700; 
  letter-spacing:2.5px; margin-bottom:14px; 
  color:#8BA888; text-transform:uppercase;
}
.section-title { 
  font-size:2.2rem; margin-bottom:16px; 
  font-weight:800; color:#4A3125; letter-spacing:-0.5px;
  line-height:1.25;
}
.section-desc { 
  max-width:620px; opacity:0.7; margin-bottom:44px; 
  font-size:1.05rem; line-height:1.7; color:#5C4338;
}

/* === 卡片网格 === */
.cards-grid { 
  display:grid; grid-template-columns:repeat(auto-fill,minmax(270px,1fr)); 
  gap:24px; 
}
.category-card { 
  border-radius:14px; padding:30px 26px; 
  border:1px solid #E8E0D5; background:#fff;
  transition:all 0.3s ease; position:relative;
  overflow:hidden;
}
.category-card::before {
  content:''; position:absolute; top:0; left:0; width:4px; height:0;
  background:#C67B5C; border-radius:0 0 4px 0; transition:height 0.35s ease;
}
.category-card:hover::before { height:60px; }
.category-card:hover { 
  transform:translateY(-4px); 
  box-shadow:0 12px 32px rgba(198,123,92,0.1), 0 4px 8px rgba(0,0,0,0.04);
  border-color:#DCC8B8;
}
.card-icon { 
  width:50px; height:50px; border-radius:12px; 
  display:flex; align-items:center; justify-content:center; 
  margin-bottom:18px; font-size:1.4rem; 
  background:#E8F0E6; color:#8BA888;
}
.category-card h3 { font-size:1.1rem; margin-bottom:8px; font-weight:700; color:#4A3125; }
.category-card p { font-size:0.9rem; opacity:0.65; margin-bottom:14px; line-height:1.6; color:#5C4338; }
.card-link { 
  font-weight:700; font-size:0.85rem; text-decoration:none; 
  color:#C67B5C; display:inline-flex; align-items:center; gap:6px;
  transition:gap 0.25s;
}
.card-link:hover { gap:10px; }

/* === 特性块 === */
.feature-block { 
  display:grid; grid-template-columns:1fr 1fr; gap:60px; align-items:center; 
}
.feature-image { 
  border-radius:16px; overflow:hidden; 
  box-shadow:0 16px 48px rgba(198,123,92,0.1), 0 2px 8px rgba(0,0,0,0.04);
  border:1px solid #E8E0D5;
}
.feature-image img { width:100%; height:auto; display:block; }
.feature-text { }
.feature-text h3 { font-size:1.6rem; font-weight:800; margin-bottom:12px; color:#4A3125; letter-spacing:-0.3px; }
.feature-text p { opacity:0.7; margin-bottom:20px; line-height:1.7; color:#5C4338; }
.feature-list { list-style:none; }
.feature-list li { 
  padding:8px 0; display:flex; align-items:center; gap:10px; 
  font-size:0.95rem; color:#4A3125;
}
.feature-list li::before { 
  content:'✓'; font-weight:700; color:#8BA888; 
  font-size:1.1rem; flex-shrink:0;
}

/* === 数据条 === */
.stats-bar { 
  display:grid; grid-template-columns:repeat(4,1fr); gap:20px; text-align:center; 
}
.stat-item { 
  padding:28px 16px; border-radius:14px; 
  border:1px solid #E8E0D5; background:#fff;
  transition:all 0.3s;
}
.stat-item:hover { 
  box-shadow:0 8px 28px rgba(198,123,92,0.08);
  transform:translateY(-2px);
}
.stat-number { 
  font-size:2.5rem; font-weight:800; color:#C67B5C; 
  line-height:1; letter-spacing:-1px;
}
.stat-label { font-size:0.9rem; opacity:0.6; margin-top:8px; color:#5C4338; }

/* === 内容墙 === */
.content-wall { 
  display:grid; grid-template-columns:repeat(auto-fill,minmax(290px,1fr)); gap:24px; 
}
.content-wall-item { 
  border-radius:14px; overflow:hidden; 
  border:1px solid #E8E0D5; background:#fff;
  transition:all 0.3s ease; 
}
.content-wall-item:hover { 
  transform:translateY(-4px); 
  box-shadow:0 14px 36px rgba(198,123,92,0.1), 0 4px 10px rgba(0,0,0,0.04);
}
.content-wall-item img { 
  width:100%; height:200px; object-fit:cover; display:block;
  border-bottom:1px solid #E8E0D5;
}
.content-wall-body { padding:22px 20px; }
.content-wall-body h3 { font-size:1.05rem; font-weight:700; margin-bottom:6px; color:#4A3125; }
.content-wall-body p { font-size:0.88rem; opacity:0.65; line-height:1.6; color:#5C4338; margin-bottom:10px; }
.content-wall-body .card-link { font-size:0.82rem; }

/* === FAQ === */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { 
  border:1px solid #E8E0D5; border-radius:12px; 
  margin-bottom:10px; overflow:hidden; cursor:pointer;
  background:#fff; transition:all 0.3s;
}
.faq-item:hover { border-color:#DCC8B8; }
.faq-item .faq-question { 
  padding:18px 22px; font-weight:700; 
  display:flex; justify-content:space-between; align-items:center;
  color:#4A3125; font-size:0.98rem; user-select:none;
  transition:color 0.2s;
}
.faq-item .faq-question::after {
  content:'+'; font-size:1.3rem; font-weight:400; 
  color:#C67B5C; transition:transform 0.3s; flex-shrink:0; margin-left:12px;
}
.faq-item.open .faq-question { color:#C67B5C; }
.faq-item.open .faq-question::after { transform:rotate(45deg); }
.faq-item .faq-answer { 
  padding:0 22px 18px; display:none; opacity:0.7; 
  font-size:0.93rem; line-height:1.7; color:#5C4338;
}
.faq-item.open .faq-answer { display:block; animation:fadeIn 0.35s ease; }
@keyframes fadeIn { from{opacity:0;transform:translateY(-6px);} to{opacity:1;transform:translateY(0);} }

/* === CTA横幅 === */
.cta-banner { 
  padding:60px 24px; text-align:center; border-radius:16px; 
  color:#fff; background:linear-gradient(135deg, #8BA888 0%, #7a9a77 40%, #6d8f6b 100%);
  position:relative; overflow:hidden;
}
.cta-banner::before {
  content:''; position:absolute; top:-30%; right:-10%; width:300px; height:300px;
  background:rgba(255,255,255,0.04); border-radius:50%; pointer-events:none;
}
.cta-banner::after {
  content:''; position:absolute; bottom:-20%; left:-8%; width:200px; height:200px;
  background:rgba(255,255,255,0.03); border-radius:50%; pointer-events:none;
}
.cta-banner h2 { color:#fff; font-size:2rem; font-weight:800; letter-spacing:-0.4px; position:relative; z-index:1; }
.cta-banner p { opacity:0.9; margin:12px 0 28px; position:relative; z-index:1; font-size:1.05rem; }
.cta-banner .btn-primary { 
  background:#fff; color:#6d8f6b; 
  box-shadow:0 4px 18px rgba(0,0,0,0.10);
  position:relative; z-index:1; font-weight:700;
}
.cta-banner .btn-primary:hover { 
  background:#f8f8f8; 
  box-shadow:0 6px 24px rgba(0,0,0,0.14);
  color:#5a7d58;
}

/* === 页脚 === */
.site-footer { 
  padding:60px 0 28px; 
  background:#F0EBE3; color:#4A3125;
  border-top:1px solid #E8E0D5;
}
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:44px; }
.footer-brand { }
.footer-brand .logo { margin-bottom:12px; }
.footer-brand p { opacity:0.65; line-height:1.7; font-size:0.9rem; color:#5C4338; max-width:280px; }
.footer-col h4 { font-weight:700; margin-bottom:16px; font-size:0.95rem; color:#4A3125; letter-spacing:0.3px; }
.footer-col ul { list-style:none; }
.footer-col ul li { margin-bottom:8px; }
.footer-col ul li a { 
  text-decoration:none; color:#5C4338; font-size:0.88rem; 
  opacity:0.7; transition:all 0.2s; 
}
.footer-col ul li a:hover { opacity:1; color:#C67B5C; padding-left:4px; }
.footer-bottom { 
  border-top:1px solid #E0D7CB; margin-top:44px; 
  padding-top:22px; text-align:center; font-size:0.85rem; 
  opacity:0.55; color:#5C4338;
}

/* === 工具类 === */
.text-accent { color:#C67B5C; }
.text-center { text-align:center; }
.seo-description { 
  max-width:600px; margin:0 auto 48px; opacity:0.65; 
  text-align:center; line-height:1.7; font-size:0.95rem; color:#5C4338;
}
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* === 响应式 === */
@media (max-width: 1024px) {
  .hero h1 { font-size:2.6rem; }
  .hero .container { gap:36px; }
  .feature-block { gap:40px; }
}
@media (max-width: 768px) {
  .section { padding:56px 0; }
  .hero { min-height:auto; padding-top:88px; padding-bottom:40px; }
  .hero .container { flex-direction:column; }
  .hero-content { max-width:100%; text-align:center; }
  .hero h1 { font-size:2.2rem; }
  .hero p { max-width:100%; margin-left:auto; margin-right:auto; }
  .hero-buttons { justify-content:center; }
  .hero-image { flex:1 1 auto; max-width:500px; margin:0 auto; }
  .feature-block { grid-template-columns:1fr; gap:32px; }
  .feature-image { order:-1; }
  .stats-bar { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; gap:32px; }
  .section-title { font-size:1.7rem; }
  
  .main-nav { display:none; }
  .menu-toggle { display:flex; }
  .main-nav.open { 
    display:flex; flex-direction:column; 
    position:absolute; top:68px; left:0; width:100%; 
    background:#FAF7F2; padding:20px 24px; gap:4px;
    border-bottom:1px solid #E8E0D5;
    box-shadow:0 12px 28px rgba(0,0,0,0.06);
  }
  .main-nav.open a { padding:12px 0; font-size:1rem; width:100%; }
  .main-nav.open .nav-cta { text-align:center; margin-top:8px; }
}
@media (max-width: 480px) {
  .container { padding:0 18px; }
  .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:center; width:100%; }
  .hero-buttons .btn { width:100%; justify-content:center; }
  .hero h1 { font-size:1.8rem; }
  .section-title { font-size:1.5rem; }
  .cta-banner { padding:40px 18px; }
  .cta-banner h2 { font-size:1.5rem; }
  .stat-number { font-size:2rem; }
  .feature-text h3 { font-size:1.35rem; }
}