/* ============================================
   牛牛28 · 琥珀暖阳 · 纸艺几何设计系统
   定义不凡 · Awwwards 级视觉语言
   ============================================ */

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

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background: #FEF7F0;
  color: #3A2A1D;
  line-height: 1.6;
}

/* 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:#F8F0E8; }

/* 装饰性背景元素 */
.section::before {
  position:absolute;
  pointer-events:none;
  z-index:0;
}

/* 导航 — 固定顶部，暖白玻璃态 */
.site-header {
  position:fixed;
  top:0;
  left:0;
  width:100%;
  z-index:1000;
  background:rgba(254,247,240,0.92);
  backdrop-filter:blur(16px) saturate(1.2);
  border-bottom:1px solid rgba(212,131,90,0.15);
  box-shadow:0 2px 40px rgba(212,131,90,0.06);
}
.header-inner {
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:72px;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.logo {
  display:flex;
  align-items:center;
  gap:12px;
  font-weight:800;
  font-size:1.3rem;
  text-decoration:none;
  color:#3A2A1D;
  letter-spacing:-0.5px;
}
.logo-icon {
  width:42px;
  height:42px;
  border-radius:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.2rem;
  background:linear-gradient(135deg, #D4835A, #E8B84B);
  color:#fff;
  box-shadow:0 4px 12px rgba(212,131,90,0.3);
  position:relative;
  overflow:hidden;
}
.logo-icon::after {
  content:'28';
  font-weight:700;
  font-size:0.75rem;
  letter-spacing:1px;
}
.logo span {
  background:linear-gradient(135deg, #D4835A, #B8603A);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}
.main-nav {
  display:flex;
  align-items:center;
  gap:32px;
  list-style:none;
}
.main-nav a {
  text-decoration:none;
  font-size:0.9rem;
  font-weight:500;
  color:#3A2A1D;
  transition:0.3s;
  position:relative;
  padding:4px 0;
}
.main-nav a::after {
  content:'';
  position:absolute;
  bottom:-2px;
  left:0;
  width:0;
  height:2px;
  background:linear-gradient(90deg, #D4835A, #E8B84B);
  transition:width 0.3s ease;
  border-radius:2px;
}
.main-nav a:hover::after { width:100%; }
.main-nav a:hover { color:#D4835A; }
.nav-cta {
  padding:10px 24px !important;
  border-radius:50px !important;
  color:#fff !important;
  font-weight:600 !important;
  background:linear-gradient(135deg, #D4835A, #B8603A);
  box-shadow:0 4px 16px rgba(212,131,90,0.35);
  transition:0.3s !important;
  border:none !important;
}
.nav-cta::after { display:none !important; }
.nav-cta:hover {
  transform:translateY(-2px) !important;
  box-shadow:0 8px 28px rgba(212,131,90,0.4) !important;
}
.menu-toggle {
  display:none;
  flex-direction:column;
  gap:5px;
  cursor:pointer;
  background:none;
  border:none;
  padding:8px;
}
.menu-toggle span {
  display:block;
  width:26px;
  height:2.5px;
  background:#3A2A1D;
  border-radius:4px;
  transition:0.3s;
}

/* 首页Hero — 暖阳层叠 */
.hero {
  min-height:80vh;
  display:flex;
  align-items:center;
  position:relative;
  padding:120px 0 80px;
  background:linear-gradient(160deg, #FEF7F0 0%, #F8EDE0 50%, #F5E6D8 100%);
  overflow:hidden;
}
.hero::before {
  content:'';
  position:absolute;
  right:-10%;
  top:-20%;
  width:600px;
  height:600px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(212,131,90,0.12) 0%, transparent 70%);
  pointer-events:none;
}
.hero::after {
  content:'28';
  position:absolute;
  right:5%;
  bottom:10%;
  font-size:18rem;
  font-weight:900;
  color:rgba(212,131,90,0.06);
  line-height:1;
  pointer-events:none;
  font-family:system-ui;
  letter-spacing:-0.05em;
}
.hero-content {
  max-width:720px;
  position:relative;
  z-index:2;
}
.hero-eyebrow {
  display:inline-block;
  font-size:0.75rem;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:3px;
  padding:6px 18px;
  border-radius:50px;
  margin-bottom:20px;
  background:rgba(212,131,90,0.12);
  color:#D4835A;
  border:1px solid rgba(212,131,90,0.2);
}
.hero h1 {
  font-size:3.2rem;
  line-height:1.15;
  margin-bottom:16px;
  font-weight:800;
  letter-spacing:-1.5px;
  color:#2D1F14;
}
.hero h1 .highlight {
  background:linear-gradient(135deg, #D4835A, #E8B84B);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
  display:inline-block;
}
.hero p {
  font-size:1.1rem;
  opacity:0.7;
  max-width:560px;
  margin-bottom:36px;
  color:#5A4A3A;
  line-height:1.7;
}
.hero-buttons {
  display:flex;
  gap:16px;
  flex-wrap:wrap;
}
.hero-image {
  border-radius:20px;
  overflow:hidden;
  box-shadow:0 20px 60px rgba(58,42,29,0.1);
  position:relative;
}
.hero-image img {
  width:100%;
  height:auto;
  display:block;
}

/* 按钮 — 温暖圆润 */
.btn {
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:14px 32px;
  border-radius:50px;
  font-weight:600;
  cursor:pointer;
  border:none;
  text-decoration:none;
  transition:0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  font-size:0.95rem;
  letter-spacing:0.3px;
}
.btn-primary {
  color:#fff;
  background:linear-gradient(135deg, #D4835A, #B8603A);
  box-shadow:0 4px 20px rgba(212,131,90,0.35);
}
.btn-primary:hover {
  transform:translateY(-3px);
  box-shadow:0 8px 32px rgba(212,131,90,0.45);
}
.btn-outline {
  background:transparent;
  border:2px solid #D4835A;
  color:#D4835A;
}
.btn-outline:hover {
  background:rgba(212,131,90,0.08);
  transform:translateY(-2px);
}

/* 标签/标题 */
.section-label {
  display:inline-block;
  font-size:0.7rem;
  font-weight:700;
  letter-spacing:3px;
  text-transform:uppercase;
  margin-bottom:14px;
  color:#D4835A;
  position:relative;
  padding-left:36px;
}
.section-label::before {
  content:'';
  position:absolute;
  left:0;
  top:50%;
  width:24px;
  height:2px;
  background:linear-gradient(90deg, #D4835A, #E8B84B);
  transform:translateY(-50%);
  border-radius:2px;
}
.section-title {
  font-size:2.2rem;
  margin-bottom:12px;
  font-weight:800;
  letter-spacing:-0.5px;
  color:#2D1F14;
  line-height:1.2;
}
.section-desc {
  max-width:600px;
  opacity:0.7;
  margin-bottom:44px;
  color:#5A4A3A;
  font-size:1.05rem;
  line-height:1.7;
}

/* 卡片网格 — 纸艺层叠 */
.cards-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:28px;
}
.category-card {
  border-radius:18px;
  padding:32px 28px;
  background:#fff;
  border:1px solid rgba(232,184,75,0.12);
  transition:0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  position:relative;
  overflow:hidden;
  box-shadow:0 2px 20px rgba(58,42,29,0.04);
}
.category-card::before {
  content:'';
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:4px;
  background:linear-gradient(90deg, #D4835A, #E8B84B);
  opacity:0;
  transition:0.4s;
}
.category-card:hover::before { opacity:1; }
.category-card:hover {
  transform:translateY(-6px);
  box-shadow:0 12px 40px rgba(212,131,90,0.12);
  border-color:rgba(212,131,90,0.2);
}
.card-icon {
  width:54px;
  height:54px;
  border-radius:16px;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:18px;
  font-size:1.5rem;
  background:linear-gradient(135deg, #F5E6D8, #FEF7F0);
  color:#D4835A;
  position:relative;
}
.card-icon::after {
  content:'';
  position:absolute;
  inset:-3px;
  border-radius:18px;
  border:1px solid rgba(212,131,90,0.1);
}
.category-card h3 {
  font-size:1.15rem;
  font-weight:700;
  margin-bottom:8px;
  color:#2D1F14;
}
.category-card p {
  font-size:0.9rem;
  opacity:0.65;
  margin-bottom:16px;
  line-height:1.6;
}
.card-link {
  font-weight:600;
  font-size:0.85rem;
  text-decoration:none;
  color:#D4835A;
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:0.3s;
}
.card-link:hover { gap:12px; color:#B8603A; }
.card-link::after {
  content:'→';
  transition:0.3s;
}

/* 特性块 — 不对称布局 */
.feature-block {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:64px;
  align-items:center;
}
.feature-image {
  border-radius:18px;
  overflow:hidden;
  box-shadow:0 12px 40px rgba(58,42,29,0.08);
  position:relative;
}
.feature-image::before {
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(135deg, rgba(212,131,90,0.08), transparent);
  pointer-events:none;
  z-index:1;
}
.feature-image img {
  width:100%;
  height:auto;
  display:block;
}
.feature-text { }
.feature-text h3 {
  font-size:1.6rem;
  font-weight:700;
  margin-bottom:16px;
  color:#2D1F14;
}
.feature-text p {
  opacity:0.7;
  margin-bottom:20px;
  line-height:1.7;
}
.feature-list {
  list-style:none;
}
.feature-list li {
  padding:8px 0;
  display:flex;
  align-items:center;
  gap:12px;
  font-size:0.95rem;
  color:#4A3A2A;
}
.feature-list li::before {
  content:'✓';
  font-weight:700;
  color:#D4835A;
  background:rgba(212,131,90,0.1);
  width:24px;
  height:24px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:0.8rem;
  flex-shrink:0;
}

/* 数据条 — 暖色卡片 */
.stats-bar {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  text-align:center;
}
.stat-item {
  padding:32px 20px;
  border-radius:18px;
  background:#fff;
  border:1px solid rgba(232,184,75,0.1);
  box-shadow:0 2px 16px rgba(58,42,29,0.03);
  transition:0.3s;
  position:relative;
  overflow:hidden;
}
.stat-item::after {
  content:'';
  position:absolute;
  bottom:0;
  left:50%;
  transform:translateX(-50%);
  width:40px;
  height:3px;
  background:linear-gradient(90deg, #D4835A, #E8B84B);
  border-radius:4px;
  opacity:0;
  transition:0.3s;
}
.stat-item:hover::after { opacity:1; width:60px; }
.stat-item:hover {
  transform:translateY(-4px);
  box-shadow:0 8px 32px rgba(212,131,90,0.1);
}
.stat-number {
  font-size:2.6rem;
  font-weight:800;
  color:#D4835A;
  line-height:1;
  letter-spacing:-1px;
}
.stat-number::after {
  content:'+';
  color:#E8B84B;
  font-weight:400;
}
.stat-label {
  font-size:0.9rem;
  opacity:0.6;
  margin-top:8px;
  color:#5A4A3A;
  font-weight:500;
}

/* 内容墙 — 新闻资讯 */
.content-wall {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(300px,1fr));
  gap:28px;
}
.content-wall-item {
  border-radius:18px;
  overflow:hidden;
  background:#fff;
  border:1px solid rgba(232,184,75,0.08);
  transition:0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow:0 2px 16px rgba(58,42,29,0.03);
}
.content-wall-item:hover {
  transform:translateY(-6px);
  box-shadow:0 12px 40px rgba(212,131,90,0.1);
  border-color:rgba(212,131,90,0.15);
}
.content-wall-item img {
  width:100%;
  height:220px;
  object-fit:cover;
  transition:0.5s;
}
.content-wall-item:hover img { transform:scale(1.03); }
.content-wall-body {
  padding:24px 22px;
}
.content-wall-body .date {
  font-size:0.75rem;
  color:#D4835A;
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:1px;
  margin-bottom:8px;
  display:block;
}
.content-wall-body h4 {
  font-size:1.05rem;
  font-weight:700;
  margin-bottom:8px;
  color:#2D1F14;
  line-height:1.4;
}
.content-wall-body p {
  font-size:0.88rem;
  opacity:0.65;
  line-height:1.6;
}

/* FAQ — 暖色折叠 */
.faq-list {
  max-width:800px;
  margin:0 auto;
}
.faq-item {
  border:1px solid rgba(232,184,75,0.12);
  border-radius:14px;
  margin-bottom:10px;
  overflow:hidden;
  cursor:pointer;
  background:#fff;
  transition:0.3s;
  box-shadow:0 2px 8px rgba(58,42,29,0.02);
}
.faq-item:hover {
  border-color:rgba(212,131,90,0.2);
  box-shadow:0 4px 16px rgba(212,131,90,0.06);
}
.faq-item .faq-question {
  padding:18px 24px;
  font-weight:600;
  display:flex;
  justify-content:space-between;
  align-items:center;
  color:#2D1F14;
  font-size:1rem;
}
.faq-item .faq-question::after {
  content:'+';
  font-size:1.3rem;
  color:#D4835A;
  transition:0.3s;
  font-weight:300;
}
.faq-item.open .faq-question::after {
  content:'−';
  transform:rotate(0deg);
  color:#B8603A;
}
.faq-item .faq-answer {
  padding:0 24px 18px;
  display:none;
  opacity:0.7;
  color:#5A4A3A;
  line-height:1.7;
  font-size:0.95rem;
}
.faq-item.open .faq-answer { display:block; }
.faq-item.open {
  border-color:rgba(212,131,90,0.2);
  box-shadow:0 4px 20px rgba(212,131,90,0.06);
}

/* CTA横幅 — 暖色渐变 */
.cta-banner {
  padding:64px 48px;
  text-align:center;
  border-radius:24px;
  background:linear-gradient(135deg, #D4835A, #B8603A, #A74C2E);
  color:#fff;
  position:relative;
  overflow:hidden;
  box-shadow:0 16px 50px rgba(212,131,90,0.3);
}
.cta-banner::before {
  content:'';
  position:absolute;
  top:-50%;
  right:-20%;
  width:400px;
  height:400px;
  border-radius:50%;
  background:rgba(232,184,75,0.1);
  pointer-events:none;
}
.cta-banner::after {
  content:'';
  position:absolute;
  bottom:-30%;
  left:-10%;
  width:300px;
  height:300px;
  border-radius:50%;
  background:rgba(255,255,255,0.05);
  pointer-events:none;
}
.cta-banner h2 {
  color:#fff;
  font-size:2rem;
  font-weight:800;
  margin-bottom:12px;
  position:relative;
  z-index:2;
}
.cta-banner p {
  color:rgba(255,255,255,0.8);
  max-width:500px;
  margin:0 auto 28px;
  position:relative;
  z-index:2;
  font-size:1.05rem;
  line-height:1.6;
}
.cta-banner .btn-primary {
  background:#fff;
  color:#D4835A;
  box-shadow:0 4px 20px rgba(0,0,0,0.1);
  position:relative;
  z-index:2;
}
.cta-banner .btn-primary:hover {
  transform:translateY(-3px);
  box-shadow:0 8px 30px rgba(0,0,0,0.15);
}

/* 页脚 — 温暖层次 */
.site-footer {
  padding:64px 0 28px;
  background:#2D1F14;
  color:rgba(255,255,255,0.75);
  position:relative;
}
.site-footer::before {
  content:'';
  position:absolute;
  top:0;
  left:0;
  width:100%;
  height:4px;
  background:linear-gradient(90deg, #D4835A, #E8B84B, #D4835A);
}
.footer-grid {
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:48px;
}
.footer-brand {
}
.footer-brand .logo {
  color:#fff;
  margin-bottom:16px;
}
.footer-brand p {
  opacity:0.6;
  font-size:0.9rem;
  line-height:1.7;
  max-width:300px;
}
.footer-col h4 {
  color:#fff;
  font-size:0.95rem;
  font-weight:700;
  margin-bottom:18px;
  letter-spacing:0.5px;
}
.footer-col ul {
  list-style:none;
}
.footer-col ul li {
  margin-bottom:10px;
}
.footer-col ul a {
  color:rgba(255,255,255,0.55);
  text-decoration:none;
  font-size:0.88rem;
  transition:0.3s;
}
.footer-col ul a:hover {
  color:#E8B84B;
  padding-left:4px;
}
.footer-bottom {
  border-top:1px solid rgba(255,255,255,0.06);
  margin-top:48px;
  padding-top:24px;
  text-align:center;
  font-size:0.82rem;
  opacity:0.45;
  letter-spacing:0.5px;
}

/* 工具类 */
.text-accent {
  color:#D4835A;
}
.text-center { text-align:center; }
.seo-description {
  max-width:600px;
  margin:0 auto 48px;
  opacity:0.7;
  color:#5A4A3A;
  line-height:1.7;
}
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* 装饰性分割线 */
.divider {
  width:60px;
  height:3px;
  background:linear-gradient(90deg, #D4835A, #E8B84B);
  border-radius:4px;
  margin:20px 0 32px;
}
.divider-center {
  margin-left:auto;
  margin-right:auto;
}

/* 徽章/标签装饰 */
.badge {
  display:inline-block;
  padding:4px 14px;
  border-radius:50px;
  font-size:0.7rem;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:1.5px;
  background:rgba(212,131,90,0.1);
  color:#D4835A;
  border:1px solid rgba(212,131,90,0.15);
}

/* 数字装饰 28 */
.num-decoration {
  font-size:8rem;
  font-weight:900;
  color:rgba(212,131,90,0.04);
  position:absolute;
  line-height:1;
  pointer-events:none;
  user-select:none;
}

/* 响应式 */
@media (max-width: 992px) {
  .hero h1 { font-size:2.6rem; }
  .section-title { font-size:1.8rem; }
  .feature-block { gap:40px; }
  .footer-grid { grid-template-columns:1fr 1fr; gap:32px; }
  .stats-bar { grid-template-columns:repeat(2,1fr); }
}

@media (max-width: 768px) {
  .hero { min-height:auto; padding:100px 0 60px; }
  .hero h1 { font-size:2.2rem; }
  .hero::after { font-size:12rem; opacity:0.04; }
  .feature-block { grid-template-columns:1fr; gap:32px; }
  .feature-image { order:-1; }
  .stats-bar { grid-template-columns:repeat(2,1fr); gap:14px; }
  .stat-number { font-size:2rem; }
  .footer-grid { grid-template-columns:1fr 1fr; }
  .main-nav { display:none; }
  .menu-toggle { display:flex; }
  .main-nav.open {
    display:flex;
    flex-direction:column;
    position:absolute;
    top:72px;
    left:0;
    width:100%;
    background:rgba(254,247,240,0.98);
    backdrop-filter:blur(20px);
    padding:28px 24px;
    gap:20px;
    border-bottom:1px solid rgba(212,131,90,0.1);
    box-shadow:0 20px 40px rgba(58,42,29,0.06);
  }
  .main-nav.open a { font-size:1.05rem; }
  .cta-banner { padding:40px 24px; }
  .cta-banner h2 { font-size:1.6rem; }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr; text-align:center; }
  .footer-brand p { max-width:100%; }
  .hero-buttons { flex-direction:column; }
  .hero h1 { font-size:1.9rem; }
  .section-title { font-size:1.5rem; }
  .hero-eyebrow { font-size:0.65rem; }
  .stat-item { padding:24px 16px; }
  .category-card { padding:24px 20px; }
  .hero::after { font-size:8rem; }
}

/* 自定义滚动条 */
::-webkit-scrollbar { width:8px; }
::-webkit-scrollbar-track { background:#F5E6D8; }
::-webkit-scrollbar-thumb {
  background:linear-gradient(180deg, #D4835A, #B8603A);
  border-radius:10px;
}
::-webkit-scrollbar-thumb:hover { background:#C2744A; }

/* 选中文本样式 */
::selection {
  background:rgba(212,131,90,0.25);
  color:#2D1F14;
}

/* 额外动画关键帧 */
@keyframes float {
  0%, 100% { transform:translateY(0); }
  50% { transform:translateY(-8px); }
}
.float-anim { animation:float 4s ease-in-out infinite; }

@keyframes pulse-glow {
  0%, 100% { box-shadow:0 4px 20px rgba(212,131,90,0.35); }
  50% { box-shadow:0 8px 40px rgba(212,131,90,0.5); }
}
.pulse-glow { animation:pulse-glow 3s ease-in-out infinite; }

/* 打印样式 */
@media print {
  .site-header { position:relative; background:#fff; }
  .hero { min-height:auto; padding:40px 0; }
  .category-card:hover { transform:none; box-shadow:none; }
  .content-wall-item:hover { transform:none; box-shadow:none; }
  .btn-primary { background:#D4835A; color:#fff; }
  .cta-banner { background:#D4835A; padding:32px; }
  .site-footer { background:#2D1F14; color:#fff; }
}