/* 基础样式 */
body {
    margin: 0;
    padding: 0;
    line-height: 1.6;
    color: #333;
}

.header {
    padding: 20px;
    background-color: #f8f9fa;
    text-align: center;
    opacity: 0.9;
    display: flex;
    align-items: center;
    justify-content: space-between; /* 修改为两端对齐 */
    border-bottom: 2px solid #2196F3;
}
.logo-group {
    display: flex;
    margin-left: 5%;
    align-items: center;
}
.header span {
    margin: 0 10px;
}
.logo {
    max-width: 120px;
    height: auto;
}
.header-btn {
    padding: 10px 24px;
    background-color: #2196F3;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    margin-right: 5%;
    transition: background 0.2s;
}
.header-btn:hover {
    background-color: #1769aa;
}

.main-content {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0;
}

.intro {
    border-radius: 18px;
    padding: 6px 48px 32px 48px;
    text-align: center;
    margin: 0;
}

.intro h1 {
    font-size: 2.4rem;
    font-weight: 800;
    margin-bottom: 18px;
    letter-spacing: 2px;
    background: linear-gradient(90deg, #2196F3 20%, #00BCD4 60%, #c4dff2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 4px 16px rgba(33,150,243,0.12);
}

.intro h2 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: 1px;
    background: linear-gradient(90deg, #00BCD4 10%, #2196F3 80%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-clip: text;
    text-shadow: 0 2px 8px rgba(0,188,212,0.10);
}

.intro p {
    font-size: 1.08rem;
    color: #444;
    margin-bottom: 0;
    line-height: 1.8;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .main-content {
        padding: 20px 0 0 0;
    }
    .intro {
        padding: 20px 10px 18px 10px;
        max-width: 98vw;
    }
    .intro h1 {
        font-size: 1.4rem;
    }
    .intro h2 {
        font-size: 1rem;
    }
    .intro p {
        font-size: 0.95rem;
    }
}



@media(max-width: 768px) {
    .logo-group {
        margin-left: 0; /* 移除左侧边距 */
    }
    .header-btn {
        margin-right: 0; /* 移除右侧边距 */
    }
    
}



.background-content {
    position: relative;
    background-color: #E3F2FD;
    margin: 10px 5%;
    opacity: 0.92;
    border-radius: 20px;
    border: 2px solid #2196F3; /* 增加亮蓝色描边 */
    padding: 0; /* 保持内容区间距由子元素控制 */
}

.coupon-list {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin: 40px 0 32px 0;
    flex-wrap: wrap;
}

.coupon-card {
    background: white;
    border: 1px solid #2196F3;
    border-left: 4px solid #2196F3;
    border-radius: 16px;
    box-shadow: 0 4px 16px 0 rgba(33,150,243,0.08);
    padding: 28px 32px 22px 32px;
    width: 25%;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.coupon-card:hover {
    transform: translateY(-8px) scale(1.03);
    box-shadow: 0 8px 32px 0 rgba(33,150,243,0.18);
    border-color: #1769aa;
    background: #fff;
}

.coupon-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #1769aa;
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.coupon-desc {
    font-size: 1rem;
    color: #333;
    margin-bottom: 14px;
    min-height: 44px;
}

.coupon-type {
    font-size: 0.98rem;
    color: #2196F3;
    font-weight: 600;
}

/* 移动端适配：缩小左右间距 */
@media (max-width: 1200px) {
    .background-content {
        margin: 10px 2%;
        border-radius: 14px;
    }
    .coupon-list {
        gap: 16px;
        margin: 24px 0 18px 0;
    }
    .coupon-card {
        width: 98vw;
        margin: 0px 5% 0px 5%;
        padding: 18px 8px 14px 8px;
    }
}

.provider-intro-list {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    justify-content: center;
    margin: 48px 1% 24px 1%;
}

.provider-intro {
    display: flex;
    background: white;
    align-items: stretch;
    border-radius: 14px;
    border: 1.5px solid #2196F3;
    width: 45%;
    min-width: 280px;
    margin: 0;
    box-sizing: border-box;
    overflow: hidden;
}

.provider-img-area {
    width: 30%;
    min-width: 100px;
    max-width: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px 0;
    
}

.provider-img-area img {
    width: 80%;
    height: auto;
    display: block;
    border-radius: 10px;
    object-fit: contain;
}

.provider-desc {
    flex: 1;
    padding: 18px 24px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.provider-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: #1769aa;
    margin-bottom: 8px;
}

.provider-text {
    font-size: 1rem;
    color: #333;
    line-height: 1.7;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .provider-intro-list {
        flex-direction: column;
        margin: 0px 5% 0px 5%;
        margin-top: 30px;
        gap: 16px;
    }
    .provider-intro {
        flex-direction: column;
        align-items: stretch;
        padding: 0;
        width: 100%;
        max-width: 100%;
    }
    .provider-img-area {
        width: 100%;
        max-width: 100%;
        min-width: 0;
        border-right: none;
        border-bottom: 1px solid #E3F2FD;
        padding: 16px 0 8px 0;
        justify-content: flex-start;
    }
    .provider-img-area img {
        width: 64px;
        margin-left: 12px;
    }
    .provider-desc {
        padding: 12px 10px;
    }
}

.annual-calc-tip {
    margin: 32px 5% 10px 5%;
    background-color: white;
    border-left: 4px solid #2196F3;
    border-radius: 10px;
    padding: 18px 22px;
    font-size: 1.08rem;
    color: #1769aa;
    font-weight: 600;
    box-shadow: 0 2px 12px 0 rgba(33,150,243,0.06);
    letter-spacing: 1px;
    line-height: 1.7;
    transition: box-shadow 0.2s;
}

.annual-calc-tip strong {
    color: #1976d2;
    font-weight: 700;
}

.get-coupon-steps {
    margin: 36px 5% 18px 5%;
}

.steps-title {
    font-size: 1.18rem;
    font-weight: 700;
    color: #1976d2;
    margin-bottom: 18px;
    letter-spacing: 1px;
}

.get-coupon-steps-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.get-coupon-step {
    background-color: white;
    border-left: 4px solid #2196F3;
    border-radius: 10px;
    padding: 18px 22px;
    font-size: 1.08rem;
    color: #1769aa;
    font-weight: 600;
    box-shadow: 0 2px 12px 0 rgba(33,150,243,0.06);
    letter-spacing: 1px;
    line-height: 1.7;
    transition: box-shadow 0.2s;
    margin: 0;
    position: relative;
}

.get-coupon-step strong {
    color: #1976d2;
    font-weight: 700;
}

.step-btn {
    margin-left: 10px;
    margin-top: 6px;
    padding: 4px 12px;
    background: #2196F3;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 0.98rem;
    cursor: pointer;
    transition: background 0.2s;
    font-weight: 600;
    box-shadow: 0 1px 4px 0 rgba(33,150,243,0.08);
    display: inline-block;
}

.step-btn2 {
    margin-left: 10px;
    margin-top: 6px;
    padding: 4px 12px;
    background: #d32f2f;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 0.98rem;
    cursor: pointer;
    transition: background 0.2s;
    font-weight: 600;
    box-shadow: 0 1px 4px 0 rgba(33,150,243,0.08);
    display: inline-block;
}

.step-btn:hover {
    background: #1769aa;
}

.step-tip {
    display: inline-block;
    color: #888;
    font-size: 0.98rem;
    font-weight: 400;
    margin-left: 8px;
}

.disclaimer-card {
    margin: 36px 5% 24px 5%;
    background-color: white;
    border-left: 4px solid #d32f2f;
    border-radius: 10px;
    padding: 22px 26px 18px 26px;
    font-size: 1.05rem;
    color: #1769aa;
    font-weight: 500;
    box-shadow: 0 2px 12px 0 rgba(33,150,243,0.06);
    letter-spacing: 1px;
    line-height: 1.7;
    transition: box-shadow 0.2s;
}

.disclaimer-title {
    font-size: 1.13rem;
    font-weight: 700;
    color: #1976d2;
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.disclaimer-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.disclaimer-list li {
    margin-bottom: 8px;
    border-bottom: 1px dashed #bbdefb;
    padding-bottom: 6px;
}

.disclaimer-list li:last-child {
    border-bottom: none;
}

.disclaimer-highlight {
    color: #d32f2f;
    font-weight: 700;
    background: #fff3e0;
    padding: 0 4px;
    border-radius: 4px;
}

.footer-copyright {
    width: 100%;
    box-sizing: border-box;
    background: #e3f2fd;
    color: #1769aa;
    font-size: 0.98rem;
    text-align: center;
    padding: 14px 0 12px 0;
    border-top: 1.5px solid #2196F3;
    border-radius: 0 0 18px 18px;
    margin-top: 18px; /* 增加与上方内容的间距 */
}

@media (max-width: 768px) {
    .header {
        align-items: flex-start;
        padding: 12px 8px;
        gap: 8px;
    }
    .logo-group {
        gap: 8px;
        margin-bottom: 6px;
    }
    .logo {
        height: 32px;
    }
    .header-btn {
        width: 100%;
        padding: 8px 0px;
        margin-top: 4px;
        box-sizing: border-box;
    }
}

.annual-calc-tip2 {
    margin: 32px 5% 10px 5%;
    background-color: white;
    border-left: 4px solid #d021f3;
    border-radius: 10px;
    padding: 18px 22px;
    font-size: 1.08rem;
    color: #1769aa;
    font-weight: 600;
    box-shadow: 0 2px 12px 0 rgba(33,150,243,0.06);
    letter-spacing: 1px;
    line-height: 1.7;
    transition: box-shadow 0.2s;
}