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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background-color: #1a1a2e;
    color: #fff;
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 640px;
    margin: 0 auto;
    min-height: 100vh;
    position: relative;
    padding-bottom: 100px;
}

.hero-section {
    position: relative;
    min-height: 300px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../assets/b0f53c7e3e1c857e34edd52af87957e6.jpg');
    background-size: cover;
    background-position: center;
    z-index: 1;
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.7) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    padding: 40px 20px;
}

.main-title {
    font-size: 48px;
    font-weight: 900;
    letter-spacing: 4px;
    margin-bottom: 8px;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.5);
}

.sub-title {
    font-size: 36px;
    font-weight: 900;
    color: #ffd700;
    letter-spacing: 2px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.5);
}

.brand-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.brand-name {
    font-size: 20px;
    font-weight: 600;
}

.brand-pinyin {
    font-size: 14px;
    opacity: 0.8;
    letter-spacing: 2px;
}

.advantages-section {
    padding: 30px 20px;
    position: relative;
    z-index: 3;
}

.section-title {
    font-size: 28px;
    font-weight: 900;
    color: #ffd700;
    text-align: center;
    margin-bottom: 12px;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.5);
}

.section-subtitle {
    font-size: 18px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 24px;
}

.cards-container {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.card {
    background-color: #ffd700;
    color: #1a1a2e;
    padding: 16px 12px;
    border-radius: 8px;
    min-width: 120px;
    text-align: center;
    font-weight: 800;
}

.card-text {
    font-size: 16px;
    line-height: 1.4;
}

.cta-container {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px 20px;
    background: linear-gradient(to top, rgba(26,26,46,0.95) 0%, transparent 100%);
    z-index: 100;
    display: flex;
    justify-content: center;
}

.cta-button {
    background: linear-gradient(135deg, #ff6b35 0%, #ff4500 50%, #ff6b35 100%);
    color: #fff;
    border: none;
    padding: 16px 48px;
    font-size: 22px;
    font-weight: 800;
    border-radius: 30px;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(255,71,0,0.5);
    animation: bounce 0.6s ease-in-out infinite;
    width: 100%;
    max-width: 360px;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.cta-button:active {
    transform: scale(0.98);
    box-shadow: 0 2px 10px rgba(255,71,0,0.5);
}

@media (max-width: 375px) {
    .container {
        max-width: 100%;
    }

    .hero-content {
        padding: 30px 16px;
    }

    .main-title {
        font-size: 36px;
        letter-spacing: 2px;
    }

    .sub-title {
        font-size: 28px;
        letter-spacing: 1px;
    }

    .brand-name {
        font-size: 16px;
    }

    .brand-pinyin {
        font-size: 12px;
    }

    .advantages-section {
        padding: 24px 16px;
    }

    .section-title {
        font-size: 22px;
    }

    .section-subtitle {
        font-size: 16px;
    }

    .card {
        padding: 12px 8px;
        min-width: 100px;
    }

    .card-text {
        font-size: 14px;
    }

    .cta-button {
        padding: 14px 40px;
        font-size: 18px;
    }

    @keyframes bounce {
        0%, 100% {
            transform: translateY(0);
        }
        50% {
            transform: translateY(-8px);
        }
    }
}

@media (min-width: 376px) and (max-width: 480px) {
    .container {
        max-width: 100%;
    }

    .hero-content {
        padding: 35px 18px;
    }

    .main-title {
        font-size: 42px;
    }

    .sub-title {
        font-size: 32px;
    }

    .brand-name {
        font-size: 18px;
    }

    .section-title {
        font-size: 24px;
    }

    .card {
        padding: 14px 10px;
        min-width: 110px;
    }

    .card-text {
        font-size: 15px;
    }

    .cta-button {
        padding: 15px 44px;
        font-size: 20px;
    }
}

@media (min-width: 481px) and (max-width: 768px) {
    .container {
        max-width: 100%;
    }

    .hero-section {
        min-height: 450px;
    }

    .hero-content {
        padding: 45px 24px;
    }

    .main-title {
        font-size: 52px;
    }

    .sub-title {
        font-size: 40px;
    }

    .brand-name {
        font-size: 22px;
    }

    .brand-pinyin {
        font-size: 16px;
    }

    .advantages-section {
        padding: 35px 24px;
    }

    .section-title {
        font-size: 32px;
    }

    .section-subtitle {
        font-size: 20px;
    }

    .card {
        padding: 18px 14px;
        min-width: 140px;
    }

    .card-text {
        font-size: 18px;
    }

    .cta-button {
        padding: 18px 56px;
        font-size: 24px;
    }

    @keyframes bounce {
        0%, 100% {
            transform: translateY(0);
        }
        50% {
            transform: translateY(-12px);
        }
    }
}

@media (min-width: 769px) {
    .container {
        max-width: 640px;
    }

    .hero-section {
        min-height: 500px;
    }

    .hero-content {
        padding: 50px 30px;
    }

    .main-title {
        font-size: 56px;
    }

    .sub-title {
        font-size: 44px;
    }

    .brand-name {
        font-size: 24px;
    }

    .brand-pinyin {
        font-size: 16px;
    }

    .advantages-section {
        padding: 40px 30px;
    }

    .section-title {
        font-size: 36px;
    }

    .section-subtitle {
        font-size: 22px;
    }

    .cards-container {
        gap: 16px;
    }

    .card {
        padding: 20px 16px;
        min-width: 160px;
    }

    .card-text {
        font-size: 20px;
    }

    .cta-button {
        padding: 20px 64px;
        font-size: 26px;
    }

    @keyframes bounce {
        0%, 100% {
            transform: translateY(0);
        }
        50% {
            transform: translateY(-14px);
        }
    }
}