/* ===== 基础样式与变量 ===== */
    :root {
        --primary: #FF6B6B;
        --secondary: #4ECDC4;
        --accent: #FFD166;
        --dark: #1A1A2E;
        --light: #F7F7F7;
        --gray: #8A8A8A;
        --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
        --transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: 'Inter', 'Segoe UI', 'PingFang SC', sans-serif;
        line-height: 1.7;
        color: var(--dark);
        background-color: var(--light);
        overflow-x: hidden;
    }

    .container {
        width: 100%;
        max-width: 1400px;
        margin: 0 auto;
        padding: 0 40px;
    }

    .section {
        padding: 120px 0;
        position: relative;
    }

    .section-title {
        margin-bottom: 80px;
        position: relative;
    }

    .section-title h2 {
        font-size: 4rem;
        font-weight: 900;
        color: var(--dark);
        margin-bottom: 20px;
        line-height: 1.1;
        position: relative;
        display: inline-block;
    }

    .section-title h2::after {
        content: '';
        position: absolute;
        bottom: -10px;
        left: 0;
        width: 80px;
        height: 6px;
        background: var(--primary);
        border-radius: 3px;
    }

    .section-title p {
        font-size: 1.3rem;
        color: var(--gray);
        max-width: 600px;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        padding: 16px 36px;
        background: var(--primary);
        color: white;
        border: none;
        border-radius: 0;
        font-size: 1rem;
        font-weight: 700;
        cursor: pointer;
        transition: var(--transition);
        text-decoration: none;
        position: relative;
        overflow: hidden;
        z-index: 1;
        text-transform: uppercase;
        letter-spacing: 1px;
    }

    .btn::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: var(--secondary);
        transition: var(--transition);
        z-index: -1;
    }

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

    .btn:hover {
        transform: translateY(-5px);
        box-shadow: 0 15px 30px rgba(255, 107, 107, 0.3);
    }

    .btn i {
        margin-left: 10px;
        transition: var(--transition);
    }

    .btn:hover i {
        transform: translateX(5px);
    }

    /* ===== 创意背景元素 ===== */
    .bg-element {
        position: absolute;
        z-index: -1;
        pointer-events: none;
    }

    .element-1 {
        top: 10%;
        right: 5%;
        width: 300px;
        height: 300px;
        background: var(--accent);
        opacity: 0.1;
        border-radius: 40% 60% 70% 30% / 40% 50% 60% 50%;
        animation: morph 15s linear infinite;
    }

    .element-2 {
        bottom: 15%;
        left: 3%;
        width: 200px;
        height: 200px;
        background: var(--secondary);
        opacity: 0.08;
        border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
        animation: morph 12s linear infinite reverse;
    }

    .element-3 {
        top: 40%;
        left: 10%;
        width: 150px;
        height: 150px;
        background: var(--primary);
        opacity: 0.05;
        border-radius: 50%;
        animation: pulse 8s ease-in-out infinite;
    }

    @keyframes morph {
        0%, 100% { border-radius: 40% 60% 70% 30% / 40% 40% 60% 50%; }
        25% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; }
        50% { border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%; }
        75% { border-radius: 40% 30% 60% 40% / 60% 40% 60% 40%; }
    }

    @keyframes pulse {
        0%, 100% { transform: scale(1); opacity: 0.05; }
        50% { transform: scale(1.2); opacity: 0.1; }
    }

    /* ===== 导航栏样式 ===== */
    header {
        background-color: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        position: fixed;
        width: 100%;
        top: 0;
        z-index: 1000;
        transition: var(--transition);
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    }

    .navbar {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 25px 0;
    }

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

    .logo-text {
        font-size: 2rem;
        font-weight: 900;
        color: var(--dark);
        position: relative;
        padding: 5px 0;
    }

    .logo-text::before {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 4px;
        background: var(--primary);
        transform: scaleX(0);
        transform-origin: right;
        transition: transform 0.5s ease;
    }

    .logo:hover .logo-text::before {
        transform: scaleX(1);
        transform-origin: left;
    }

    .nav-menu {
        display: flex;
        list-style: none;
    }

    .nav-menu li {
        margin-left: 40px;
        position: relative;
    }

    .nav-menu a {
        text-decoration: none;
        color: var(--dark);
        font-weight: 600;
        transition: var(--transition);
        position: relative;
        padding: 5px 0;
    }

    .nav-menu a::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 0;
        height: 3px;
        background: var(--primary);
        transition: var(--transition);
    }

    .nav-menu a:hover {
        color: var(--primary);
    }

    .nav-menu a:hover::after {
        width: 100%;
    }

    .phone-number {
        font-weight: 700;
        color: var(--primary);
        font-size: 1.1rem;
        display: flex;
        align-items: center;
        padding: 10px 20px;
        border: 2px solid var(--primary);
        transition: var(--transition);
    }

    .phone-number:hover {
        background: var(--primary);
        color: white;
    }

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

    .mobile-toggle {
        display: none;
        font-size: 1.5rem;
        cursor: pointer;
        color: var(--dark);
    }

    /* ===== 底部样式 ===== */
    footer {
        background: var(--dark);
        color: white;
        padding: 100px 0 40px;
        position: relative;
        overflow: hidden;
    }

    .footer-content {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
        gap: 60px;
        margin-bottom: 60px;
    }

    .footer-column h3 {
        font-size: 1.5rem;
        margin-bottom: 30px;
        color: white;
        position: relative;
        padding-bottom: 15px;
    }

    .footer-column h3::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 60px;
        height: 4px;
        background: var(--primary);
        border-radius: 2px;
    }

    .footer-links {
        list-style: none;
    }

    .footer-links li {
        margin-bottom: 15px;
    }

    .footer-links a {
        color: #adb5bd;
        text-decoration: none;
        transition: var(--transition);
        display: inline-block;
    }

    .footer-links a:hover {
        color: white;
        transform: translateX(5px);
    }

    .contact-info {
        display: flex;
        align-items: center;
        margin-bottom: 20px;
    }

    .contact-info i {
        margin-right: 15px;
        color: var(--primary);
        font-size: 1.3rem;
    }

    .qrcode {
        text-align: center;
    }

    .qrcode img {
        max-width: 160px;
        border: 4px solid var(--primary);
        border-radius: 0;
        margin-bottom: 15px;
    }

    .friend-links {
        display: flex;
        flex-wrap: wrap;
        gap: 15px;
        margin-top: 20px;
    }

    .friend-links a {
        color: #adb5bd;
        text-decoration: none;
        transition: var(--transition);
        padding: 8px 15px;
        background: rgba(255, 255, 255, 0.05);
        border-radius: 0;
    }

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

    .copyright {
        text-align: center;
        padding-top: 40px;
        border-top: 1px solid #495057;
        font-size: 0.9rem;
        color: #adb5bd;
    }

    /* ===== 响应式设计 ===== */
    @media (max-width: 1200px) {
        .section-title h2 {
            font-size: 3.5rem;
        }
    }

    @media (max-width: 992px) {
        .section-title h2 {
            font-size: 3rem;
        }
    }

    @media (max-width: 768px) {
        .nav-menu {
            position: fixed;
            top: 90px;
            left: -100%;
            width: 80%;
            height: calc(100vh - 90px);
            background: white;
            flex-direction: column;
            align-items: center;
            padding-top: 60px;
            transition: var(--transition);
            box-shadow: 5px 0 15px rgba(0, 0, 0, 0.1);
            z-index: 999;
        }
        
        .nav-menu.active {
            left: 0;
        }
        
        .nav-menu li {
            margin: 25px 0;
        }
        
        .mobile-toggle {
            display: block;
        }
        
        .section {
            padding: 100px 0;
        }
        
        .container {
            padding: 0 30px;
        }
    }

    @media (max-width: 576px) {
        .section-title h2 {
            font-size: 2.5rem;
        }
        
        .section-title p {
            font-size: 1.1rem;
        }
        
        .container {
            padding: 0 20px;
        }
    }