html, body {
  width: 100%;
  overflow-x: hidden;
  /* 注意：不要添加 -webkit-overflow-scrolling: touch; 到 body 上 */
}
a:hover {
  text-decoration: underline;
}
        /* 演示页面内容占位 */
        .demo-placeholder {
            max-width: 1200px;
            margin: 60px auto;
            padding: 40px 24px;
            background: white;
            border-radius: 32px;
            box-shadow: 0 8px 30px rgba(0,0,0,0.05);
            text-align: center;
        }
        .demo-placeholder h2 {
            color: #1e2a3e;
            margin-bottom: 16px;
        }
        .demo-placeholder p {
            color: #4b5563;
            line-height: 1.6;
        }

        /* ---------- 电脑端导航 (白底高级红点缀) ---------- */
        .header-nav {
            background-color: #fff;
            width: 100%;
            position: sticky;
            top: 0;
            z-index: 999;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            transition: box-shadow 0.2s ease;
        }
        .nav-container {
            max-width: 1480px;
            margin: 0 auto;
            padding: 0 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 88px;
        }
        .logo {
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .logo img {
            height: 100%;
            width: auto;
            transition: transform 0.2s ease;
            object-fit: contain;
        }
        .logo:hover img {
            transform: scale(1.02);
        }
        .desktop-nav {
            display: flex;
            align-items: center;
            gap: 42px;
            margin: 0;
            padding: 0;
        }
        .desktop-nav li {
            list-style: none;
        }
        .desktop-nav li a {
            text-decoration: none;
            color: #1f2937;
            font-size: 16px;
            font-weight: 500;
            padding: 8px 0;
            border-bottom: 2px solid transparent;
            transition: all 0.25s cubic-bezier(0.2, 0.9, 0.4, 1.1);
            letter-spacing: 0.3px;
        }
        .desktop-nav li a:hover {
            border-bottom-color: #cb0000;
            color: #cb0000;
            transform: translateY(-1px);
        }
        .apply-btn {
            background: linear-gradient(145deg, #cb0000, #b00000);
            color: #fff;
            padding: 12px 28px;
            border-radius: 40px;
            font-size: 15px;
            font-weight: 600;
            transition: all 0.3s ease;
            box-shadow: 0 4px 8px rgba(203, 0, 0, 0.2);
            letter-spacing: 0.5px;
            border: none;
            cursor: pointer;
            display: inline-block;
            text-decoration: none;
        }
        .apply-btn:hover {
            background: linear-gradient(145deg, #a80000, #8f0000);
            transform: translateY(-2px);
            box-shadow: 0 10px 18px rgba(203, 0, 0, 0.25);
            color: white;
        }

        /* ---------- 手机端顶部栏 (白底+折叠按钮) ---------- */
        .mobile-top-bar {
            display: none;
            background-color: #fff;
            height: 70px;
            padding: 0 20px;
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            position: sticky;
            top: 0;
            z-index: 1001;
        }
        .mobile-menu-btn {
            width: 23px;
            height: 18px;
            position: relative;
            cursor: pointer;
            z-index: 1002;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }
        .mobile-menu-btn span {
            display: block;
            width: 100%;
            height: 3px;
            background-color: #2c3e50;
            border-radius: 6px;
            transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
        }
        .mobile-menu-btn.active span:nth-child(1) {
            transform: rotate(45deg) translate(7px, 7px);
            background-color: #cb0000;
        }
        .mobile-menu-btn.active span:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .mobile-menu-btn.active span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
            background-color: #cb0000;
        }

        /* ---------- 手机端常驻红色导航栏 (现代化卡片风格) ---------- */
        .mobile-fixed-nav {
            display: none;
            background: linear-gradient(95deg, #cb0000 0%, #e01010 100%);
            width: 100%;
            padding: 8px 0;
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.08);
            position: relative;
            z-index: 99;
            border-top: 1px solid rgba(255,255,255,0.2);
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }
        .mobile-fixed-nav ul {
            display: flex;
            justify-content: space-around;
            align-items: center;
            flex-wrap: nowrap;
            padding: 0 12px;
            gap: 4px;
            margin: 0;
        }
        .mobile-fixed-nav li {
            list-style: none;
            flex: 1;
            text-align: center;
        }
        .mobile-fixed-nav li a {
            color: #fff;
            font-size: 13px;
            font-weight: 500;
            text-decoration: none;
            display: block;
            padding: 8px 6px;
            border-radius: 32px;
            transition: all 0.2s ease;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .mobile-fixed-nav li a:hover {
            background-color: rgba(255,255,255,0.25);
            transform: translateY(-2px);
            color: #fff;
        }
        /* 极端小屏适配 */
        @media (max-width: 480px) {
            .mobile-fixed-nav li a {
                font-size: 11px;
                padding: 6px 4px;
            }
        }

        /* ---------- 手机端全屏折叠菜单 (侧滑优雅红) ---------- */
        .mobile-nav {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            background: #cb0000;
            background: linear-gradient(135deg, #cb0000 0%, #b82b2b 100%);
            padding: 20px 24px 32px;
            display: none;
            flex-direction: column;
            gap: 6px;
            z-index: 1000;
            box-shadow: 0 20px 30px -10px rgba(0,0,0,0.2);
            border-radius: 0 0 28px 28px;
            animation: fadeSlideDown 0.3s ease-out forwards;
            margin: 0;
        }
        @keyframes fadeSlideDown {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .mobile-nav li {
            list-style: none;
        }
        .mobile-nav li a {
            color: #fff;
            font-size: 17px;
            font-weight: 500;
            padding: 14px 16px;
            display: block;
            border-radius: 60px;
            transition: background 0.2s, transform 0.1s;
            text-decoration: none;
            letter-spacing: 0.8px;
            background: rgba(255,255,255,0.08);
            margin-bottom: 6px;
            text-align: center;
        }
        .mobile-nav li a:hover {
            background-color: rgba(255,255,255,0.2);
            transform: scale(1.01);
        }
        .mobile-nav .mobile-apply-btn a {
            background-color: #ffffff;
            color: #cb0000;
            font-weight: 700;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            margin-top: 12px;
        }
        .mobile-nav .mobile-apply-btn a:hover {
            background-color: #fff4f4;
            color: #a00000;
        }

        /* 响应式切换：电脑端隐藏手机相关，手机端隐藏电脑导航 */
        @media (min-width: 768px) {
            .mobile-top-bar, .mobile-nav, .mobile-fixed-nav {
                display: none !important;
            }
        }
        @media (max-width: 767px) {
            .header-nav {
                display: none;
            }
            .mobile-top-bar {
                display: flex;
            }
            .mobile-fixed-nav {
                display: block;
            }
            .mobile-nav.show {
                display: flex;
            }
        }

        /* 辅助重置 */
        a {
            text-decoration: none;
        }
        .desktop-nav, .desktop-nav li, .mobile-fixed-nav ul, .mobile-fixed-nav li, .mobile-nav, .mobile-nav li {
            margin: 0;
            padding: 0;
        }
        .mobile-fixed-nav li a, .mobile-nav li a, .apply-btn {
            cursor: pointer;
            -webkit-tap-highlight-color: rgba(203,0,0,0.2);
        }
:root {
  --primary-red: #cb0000;
  --primary-dark: #9e0000;
}
.footer-nav {
  background: #f1f2f6;
  padding: 2rem 1rem;
  text-align: center;
  border-top: 1px solid #e2e6ea;
}
.footer-nav a {
  color: var(--primary-red);
  text-decoration: none;
  margin: 0 15px;
  font-weight: 500;
}
.footer-nav a:hover {
  text-decoration: none;
}
.text-primary-red {
  text-decoration: none;
  color: var(--primary-red) !important;
}