.sec-head { text-align: center; margin-bottom: 48px; }
			.sec-head h2 { font-size: 34px; font-weight: 800; letter-spacing: -.4px; margin-bottom: 8px; color: var(--primary); }
			.sec-head .underline { display: block; width: 50px; height: 3px; background: var(--gold); margin: 0 auto 12px auto; border-radius: 2px; }
			.sec-head p { color: var(--text-muted); font-size: 15px; }
			
			section { padding: 80px 0; }
			section:nth-of-type(odd) { background: var(--white); }
			section:nth-of-type(even) { background: var(--bg); }
			
			
			/* ==========================================
			   2. 页面专属样式 (仅限 关于我们.html 使用)
			========================================== */
			
			/* 页面 Banner */
			.page-banner { height: 320px; position: relative; overflow: hidden; }
			.page-banner-bg { width: 100%; height: 100%; background: url('https://picsum.photos/id/1015/1920/600') center/cover no-repeat; }
			.page-banner-overlay { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(58,58,58,.65) 0%, rgba(58,58,58,.85) 100%); display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; color: #fff; }
			.page-banner-overlay h1 { font-size: 42px; font-weight: 800; margin-bottom: 12px; letter-spacing: -.5px; }
			.page-banner-overlay p { font-size: 18px; color: rgba(255,255,255,.75); line-height: 1.6; }
			
			/* 平台介绍 */
			.about-intro {
			  text-align: center; max-width: 900px; margin: 0 auto;
			  font-size: 17px; color: var(--text-mid); line-height: 2;
			}
			.about-intro p + p { margin-top: 20px; }
			
			/* 使命愿景 */
			.mv-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
			.mv-card {
			  background: var(--bg-card); border-radius: var(--radius); padding: 50px 40px;
			  text-align: center; box-shadow: var(--shadow-sm); border: 1px solid var(--border);
			  transition: all .35s cubic-bezier(.25,.46,.45,.94); position: relative; overflow: hidden;
			}
			.mv-card::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 40px; height: 2px; background: var(--gold); border-radius: 2px; opacity: 0; transition: all .35s; }
			.mv-card:hover::after { opacity: 1; width: 80px; }
			.mv-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
			
			.mv-icon {
			  width: 80px; height: 80px; border-radius: 20px; display: inline-flex;
			  align-items: center; justify-content: center; margin-bottom: 28px;
			  transition: transform .3s, box-shadow .3s;
			}
			.mv-card:hover .mv-icon { transform: scale(1.05); }
			.mv-icon svg { width: 40px; height: 40px; }
			
			.mv-card:nth-child(1) .mv-icon { background: linear-gradient(135deg, #F59E0B, #EF4444); box-shadow: 0 8px 24px rgba(245,158,11,.25); }
			.mv-card:nth-child(2) .mv-icon { background: linear-gradient(135deg, #06B6D4, #3B82F6); box-shadow: 0 8px 24px rgba(6,182,212,.25); }
			
			.mv-card h3 { font-size: 24px; font-weight: 800; color: var(--primary); margin-bottom: 16px; }
			.mv-card p { font-size: 16px; color: var(--text-mid); line-height: 1.8; }
			
			/* 发展计划 */
			.plan-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
			.plan-card {
			  background: var(--bg-card); border-radius: var(--radius); padding: 32px;
			  box-shadow: var(--shadow-sm); border: 1px solid var(--border);
			  display: flex; gap: 24px; align-items: flex-start;
			  transition: all .35s cubic-bezier(.25,.46,.45,.94); position: relative; overflow: hidden;
			}
			.plan-card::before {
			  content: ''; position: absolute; left: 0; top: 0; bottom: 0;
			  width: 4px; background: var(--gold); transform: scaleY(0); transition: transform .35s; transform-origin: bottom;
			}
			.plan-card:hover::before { transform: scaleY(1); }
			.plan-card:hover { box-shadow: var(--shadow-lg); transform: translateX(4px); }
			
			.plan-num {
			  font-size: 36px; font-weight: 900; color: var(--border); line-height: 1; flex-shrink: 0;
			  width: 50px; text-align: center; transition: color .35s;
			}
			.plan-card:hover .plan-num { color: var(--gold); }
			
			.plan-info h4 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 10px; }
			.plan-info p { font-size: 15px; color: var(--text-muted); line-height: 1.6; }
			
			/* 联系我们 */
			.contact-card {
			  background: var(--bg-card); border-radius: var(--radius); padding: 60px;
			  box-shadow: var(--shadow-md); border: 1px solid var(--border);
			  display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; align-items: center;
			  position: relative; overflow: hidden;
			}
			.contact-card::before {
			  content: ''; position: absolute; left: 0; top: 0; bottom: 0;
			  width: 4px; background: linear-gradient(180deg, var(--gold), var(--gold-bright));
			}
			.contact-text h3 { font-size: 28px; font-weight: 800; color: var(--primary); margin-bottom: 12px; }
			.contact-text .underline-left { display: block; width: 40px; height: 3px; background: var(--gold); margin-bottom: 24px; border-radius: 2px; }
			.contact-text > p { font-size: 16px; color: var(--text-mid); margin-bottom: 30px; line-height: 1.8; }
			
			.contact-list { list-style: none; display: flex; flex-direction: column; gap: 20px; }
			.contact-list li { display: flex; align-items: center; gap: 16px; font-size: 15px; color: var(--text-mid); }
			.contact-icon {
			  width: 48px; height: 48px; border-radius: 12px; background: var(--gold-pale); color: var(--gold);
			  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
			}
			.contact-icon svg { width: 22px; height: 22px; }
			
			.contact-qr { text-align: center; }
			.contact-qr-box {
			  display: inline-block; background: var(--bg); padding: 16px;
			  border-radius: var(--radius); box-shadow: var(--shadow-sm);
			}
			.contact-qr-box img { width: 200px; height: 200px; border-radius: 10px; display: block; }
			.contact-qr p { margin-top: 14px; font-size: 14px; color: var(--text-muted); }
			
			/* 专属响应式 */
			@media (max-width: 768px) {
				.sec-head h2,.contact-text h3{font-size: 20px;}
			  .page-banner { height: 240px; }
			  .page-banner-overlay h1 { font-size: 28px; }
			  .container { padding: 0 16px; }
			  section { padding: 1rem 0; }
			  .mv-grid, .plan-grid { grid-template-columns: 1fr; }
			  .contact-card { grid-template-columns: 1fr; gap: 40px; padding: 36px 24px; }
			}