:root {
            --primary-color: #c00a27;
            --primary-dark: #9a001c;
            --primary-light: #e63946;
            --dark-color: #1a1a1a;
            --light-color: #f8f9fa;
            --gray-color: #6c757d;
            --transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 20px 40px rgba(0, 0, 0, 0.15);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', Arial, sans-serif;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background-color: #fff;
            color: var(--dark-color);
            line-height: 1.7;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        ul {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .section {
            padding: 100px 0;
            position: relative;
        }

        .section-title {
            text-align: center;
            margin-bottom: 70px;
            position: relative;
        }

        .section-title h2 {
            font-size: 42px;
            color: var(--dark-color);
            margin-bottom: 20px;
            position: relative;
            display: inline-block;
            font-weight: 700;
        }

        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
            border-radius: 2px;
        }

        .section-title p {
            color: var(--gray-color);
            max-width: 700px;
            margin: 0 auto;
            font-size: 18px;
        }

        .btn {
            display: inline-block;
            padding: 14px 35px;
            background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
            color: white;
            border: none;
            border-radius: 50px;
            cursor: pointer;
            transition: var(--transition);
            font-weight: 600;
            text-align: center;
            position: relative;
            overflow: hidden;
            z-index: 1;
        }

        .btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
            transition: var(--transition);
            z-index: -1;
        }

        .btn:hover::before {
            left: 0;
        }

        .btn:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(198, 10, 39, 0.3);
        }

        /* Header & Navigation */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
            z-index: 1000;
            transition: var(--transition);
        }

        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 0;
        }

        .logo {
            display: flex;
            align-items: center;
        }

        .logo-img {
            width: 55px;
            height: 55px;
            background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 20px;
            box-shadow: 0 5px 15px rgba(198, 10, 39, 0.2);
        }

        .logo-text {
            margin-left: 15px;
        }

        .logo-text h1 {
            font-size: 26px;
            color: var(--primary-color);
            line-height: 1.2;
        }

        .logo-text p {
            font-size: 12px;
            color: var(--gray-color);
        }

        nav ul {
            display: flex;
        }

        nav ul li {
            margin-left: 35px;
            position: relative;
        }

        nav ul li a {
            font-weight: 600;
            transition: var(--transition);
            position: relative;
            padding: 8px 0;
        }

        nav ul li a:hover {
            color: var(--primary-color);
        }

        nav ul li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
            transition: var(--transition);
        }

        nav ul li a:hover::after {
            width: 100%;
        }

        .contact-phone {
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
            color: white;
            padding: 12px 25px;
            border-radius: 50px;
            font-weight: bold;
            font-size: 16px;
            box-shadow: 0 5px 15px rgba(198, 10, 39, 0.2);
            transition: var(--transition);
        }

        .contact-phone:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(198, 10, 39, 0.3);
        }

        .contact-phone i {
            margin-right: 8px;
        }

        .mobile-menu-btn {
            display: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--primary-color);
        }


    /* Footer */
        footer {
            background: linear-gradient(135deg, #1a1a1a, #2a2a2a);
            color: white;
            padding: 80px 0 30px;
            position: relative;
            overflow: hidden;
        }

        footer::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -100px;
            width: 300px;
            height: 300px;
            background: rgba(198, 10, 39, 0.05);
            border-radius: 50%;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 50px;
            margin-bottom: 50px;
            position: relative;
            z-index: 2;
        }

        .footer-column h3 {
            font-size: 20px;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 12px;
            font-weight: 700;
        }

        .footer-column h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
        }

        .footer-column ul li {
            margin-bottom: 12px;
        }

        .footer-column ul li a {
            transition: var(--transition);
            color: #aaa;
            position: relative;
            padding-left: 0;
        }

        .footer-column ul li a::before {
            content: '›';
            position: absolute;
            left: 0;
            color: var(--primary-color);
            opacity: 0;
            transition: var(--transition);
        }

        .footer-column ul li a:hover {
            color: white;
            padding-left: 15px;
        }

        .footer-column ul li a:hover::before {
            opacity: 1;
        }

        .contact-info {
            margin-bottom: 25px;
        }

        .contact-info p {
            margin-bottom: 12px;
            color: #aaa;
            display: flex;
            align-items: center;
        }

        .contact-info i {
            margin-right: 10px;
            color: var(--primary-color);
            width: 20px;
        }

        .contact-info .phone {
            font-size: 22px;
            font-weight: bold;
            color: white;
        }

        .qrcode {
            text-align: center;
        }

        .qrcode img {
            max-width: 130px;
            margin-bottom: 15px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }

        .qrcode p {
            font-size: 14px;
            color: #aaa;
        }

        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 14px;
            position: relative;
            z-index: 2;
        }

        .friend-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 20px;
        }

        .friend-links a {
            color: #aaa;
            transition: var(--transition);
            padding: 5px 10px;
            border-radius: 4px;
        }

        .friend-links a:hover {
            color: white;
            background-color: rgba(255, 255, 255, 0.1);
        }