/* 全局样式重置 & 自适应基础 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", Arial, sans-serif;
}
html {
    font-size: 16px;
}
ul, li {
    list-style: none;
}
a {
    text-decoration: none;
    color: #333;
    transition: all 0.3s ease;
    -webkit-tap-highlight-color: transparent;
}
a:hover {
    color: #1DA1F2;
}
.wrap, .container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}
.section {
    padding: 50px 0;
}
.sect-head {
    text-align: center;
    margin-bottom: 35px;
}
.sect-head h2 {
    font-size: clamp(22px, 3vw, 32px);
    color: #222;
    margin-bottom: 12px;
}
.sect-head p {
    font-size: clamp(14px, 1.2vw, 16px);
    color: #666;
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

/* 头部导航 */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 999;
}
.head-box {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 70px;
    padding: 10px 0;
}
.logo-text {
    font-size: clamp(20px, 2vw, 28px);
    font-weight: bold;
    color: #1DA1F2;
}
.nav-menu {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 20px;
    justify-content: flex-end;
}
.nav-menu a {
    font-size: clamp(13px, 1vw, 16px);
    font-weight: 500;
    line-height: 1.4;
    white-space: nowrap;
}
.nav-menu a:last-child {
    color: #1DA1F2;
    font-weight: bold;
}

/* 首页Banner */
.banner {
    background: linear-gradient(135deg, #1DA1F2, #0F8ACF);
    color: #fff;
    padding: 50px 0;
}
.banner-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 30px;
}
.ban-left {
    flex: 1 1 450px;
}
.ban-right {
    flex: 1 1 320px;
}
.ban-tag {
    display: inline-block;
    background: rgba(255,255,255,0.2);
    padding: 6px 14px;
    border-radius: 30px;
    font-size: clamp(12px, 1vw, 14px);
    margin-bottom: 15px;
}
.ban-title {
    font-size: clamp(26px, 4vw, 46px);
    line-height: 1.2;
    margin-bottom: 20px;
}
.ban-title span {
    color: #fef200;
}
.ban-desc {
    font-size: clamp(14px, 1.2vw, 17px);
    line-height: 1.8;
    margin-bottom: 25px;
    opacity: 0.95;
}
.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 30px;
}
.btn-white {
    display: inline-block;
    padding: 12px 26px;
    background: #fff;
    color: #1DA1F2;
    border-radius: 50px;
    font-size: clamp(14px, 1vw, 16px);
    font-weight: bold;
}
.btn-trans {
    display: inline-block;
    padding: 12px 26px;
    border: 2px solid #fff;
    color: #fff;
    border-radius: 50px;
    font-size: clamp(14px, 1vw, 16px);
}
.btn-white:hover {
    background: #f0f7ff;
}
.btn-trans:hover {
    background: rgba(255,255,255,0.15);
}
.data-list {
    display: flex;
    flex-wrap: wrap;
    gap: 25px 35px;
}
.data-item .data-num {
    font-size: clamp(22px, 2vw, 30px);
    font-weight: bold;
    margin-bottom: 5px;
}
.data-item div:last-child {
    font-size: clamp(13px, 1vw, 15px);
    opacity: 0.9;
}

.panel {
    background: #fff;
    border-radius: 12px;
    padding: 25px 20px;
    color: #333;
}
.panel h3 {
    font-size: clamp(16px, 1.5vw, 20px);
    margin-bottom: 20px;
    color: #222;
}
.progress-line {
    height: 8px;
    background: #eee;
    border-radius: 5px;
    margin-bottom: 15px;
    overflow: hidden;
}
.progress-inner {
    height: 100%;
    background: #1DA1F2;
    border-radius: 5px;
}
.info-tip {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px dashed #eee;
}
.info-tip h4 {
    font-size: clamp(15px, 1.2vw, 17px);
    margin-bottom: 8px;
}
.info-tip p {
    font-size: clamp(13px, 1vw, 14px);
    color: #666;
    line-height: 1.7;
}

/* 关于我们 */
.about-grid {
    display: flex;
    gap: 30px;
    align-items: center;
    flex-wrap: wrap;
}
.about-text {
    flex: 1 1 320px;
}
.about-img {
    flex: 1 1 300px;
    min-height: 240px;
    background: #f0f7ff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #1DA1F2;
    font-size: clamp(16px, 2vw, 20px);
}
.about-text h3 {
    font-size: clamp(18px, 2vw, 24px);
    margin-bottom: 15px;
    color: #222;
}
.about-text p {
    font-size: clamp(14px, 1.1vw, 16px);
    color: #666;
    line-height: 1.9;
    margin-bottom: 12px;
}

/* 合作AI平台 - 自适应网格 */
.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 20px;
}
.platform-card {
    text-align: center;
    padding: 20px 12px;
    background: #f8f9fa;
    border-radius: 10px;
    transition: 0.3s;
    position: relative;
}
.platform-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 20px rgba(29,161,242,0.15);
}
.platform-logo {
    width: 50px;
    height: 50px;
    margin-bottom: 12px;
}
.platform-num {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 24px;
    height: 24px;
    line-height: 24px;
    background: #1DA1F2;
    color: #fff;
    border-radius: 50%;
    font-size: 12px;
}
.platform-card h3 {
    font-size: clamp(15px, 1.2vw, 18px);
    margin-bottom: 8px;
    color: #222;
}
.platform-card p {
    font-size: clamp(12px, 1vw, 14px);
    color: #666;
    line-height: 1.6;
}

/* 核心服务 */
.service-bg {
    background: #f5f9ff;
}
.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}
.service-card {
    background: #fff;
    padding: 25px 15px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 3px 12px rgba(0,0,0,0.06);
    transition: 0.3s;
}
.service-card:hover {
    box-shadow: 0 6px 20px rgba(29,161,242,0.18);
}
.service-card h3 {
    font-size: clamp(16px, 1.3vw, 19px);
    margin-bottom: 10px;
    color: #222;
}
.service-card p {
    font-size: clamp(13px, 1vw, 14px);
    color: #666;
    line-height: 1.7;
}

/* 运营套餐 */
.package-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}
.package-card {
    background: #fff;
    border: 1px solid #e8e8e8;
    border-radius: 10px;
    padding: 25px 20px;
    text-align: center;
    transition: 0.3s;
}
.package-card:hover {
    border-color: #1DA1F2;
    box-shadow: 0 6px 20px rgba(29,161,242,0.12);
}
.package-card h4 {
    font-size: clamp(17px, 1.5vw, 20px);
    margin-bottom: 12px;
    color: #222;
}
.package-desc {
    font-size: clamp(13px, 1vw, 14px);
    color: #666;
    line-height: 1.7;
    margin-bottom: 15px;
    min-height: 50px;
}
.package-price {
    font-size: clamp(20px, 2vw, 24px);
    color: #1DA1F2;
    font-weight: bold;
    margin-bottom: 20px;
}
.package-list {
    text-align: left;
    margin-bottom: 20px;
}
.package-list li {
    font-size: clamp(13px, 1vw, 14px);
    color: #666;
    line-height: 1.8;
    padding-left: 18px;
    position: relative;
}
.package-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #1DA1F2;
}
.package-btn {
    display: inline-block;
    padding: 10px 24px;
    background: #1DA1F2;
    color: #fff;
    border-radius: 6px;
    font-size: clamp(13px, 1vw, 15px);
}
.package-btn:hover {
    background: #0F8ACF;
    color: #fff;
}

/* 成功案例 */
.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}
.case-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 3px 12px rgba(0,0,0,0.06);
    transition: 0.3s;
}
.case-card:hover {
    transform: translateY(-5px);
}
.case-content {
    padding: 20px;
}
.case-content h4 {
    font-size: clamp(16px, 1.3vw, 18px);
    margin-bottom: 10px;
    color: #222;
}
.case-content p {
    font-size: clamp(13px, 1vw, 14px);
    color: #666;
    line-height: 1.7;
    margin-bottom: 6px;
}
.case-data {
    color: #1DA1F2 !important;
    font-weight: 500;
}

/* 合作行业 */
.industry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}
.industry-card {
    background: #fff;
    padding: 25px 15px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 3px 12px rgba(0,0,0,0.06);
}
.industry-card h3 {
    font-size: clamp(16px, 1.3vw, 19px);
    margin-bottom: 10px;
    color: #222;
}
.industry-card p {
    font-size: clamp(13px, 1vw, 14px);
    color: #666;
    line-height: 1.7;
}

/* 服务流程 */
.flow-wrap {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 25px 15px;
}
.flow-item {
    width: 160px;
    text-align: center;
    position: relative;
}
.flow-num {
    width: 45px;
    height: 45px;
    line-height: 45px;
    background: #1DA1F2;
    color: #fff;
    border-radius: 50%;
    margin: 0 auto 12px;
    font-size: 16px;
    font-weight: bold;
}
.flow-item h4 {
    font-size: clamp(15px, 1.2vw, 17px);
    margin-bottom: 8px;
    color: #222;
}
.flow-item p {
    font-size: clamp(12px, 1vw, 14px);
    color: #666;
    line-height: 1.6;
}

/* 优势板块 */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}
.advantage-card {
    background: #fff;
    padding: 25px 15px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 3px 12px rgba(0,0,0,0.06);
    transition: 0.3s;
}
.advantage-card:hover {
    transform: translateY(-5px);
}
.advantage-card h3 {
    font-size: clamp(16px, 1.3vw, 19px);
    margin-bottom: 10px;
    color: #222;
}
.advantage-card p {
    font-size: clamp(13px, 1vw, 14px);
    color: #666;
    line-height: 1.7;
}

/* 咨询转化区 */
.consult-section {
    background: linear-gradient(135deg, #1DA1F2, #0F8ACF);
    color: #fff;
    text-align: center;
    padding: 50px 15px;
}
.consult-box h2 {
    font-size: clamp(22px, 3vw, 32px);
    margin-bottom: 15px;
}
.consult-box p {
    font-size: clamp(14px, 1.2vw, 17px);
    margin-bottom: 25px;
    opacity: 0.95;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

/* 行业资讯 */
.news-section {
    padding: 50px 0;
    background: #f8f9fa;
}
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}
.news-card {
    background: #fff;
    padding: 18px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.news-card h4 {
    font-size: clamp(14px, 1.1vw, 16px);
    margin-bottom: 8px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.news-card p {
    font-size: clamp(12px, 1vw, 13px);
    color: #666;
    line-height: 1.6;
    margin-bottom: 8px;
}
.news-time {
    font-size: 11px;
    color: #999;
}

/* 链接模块 */
.home_pic {
    padding: 30px 0;
    border-bottom: 1px solid #eee;
}
.widget_link h5 {
    font-size: clamp(16px, 1.3vw, 18px);
    color: #222;
    margin-bottom: 15px;
    padding-left: 10px;
    border-left: 4px solid #1DA1F2;
}
.widget_link ul {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 20px;
}
.widget_link li a {
    font-size: clamp(12px, 1vw, 14px);
    color: #555;
}

/* 页脚 */
.footer {
    background: #222;
    color: #ccc;
    padding: 40px 15px;
    text-align: center;
}
.footer p {
    font-size: clamp(13px, 1vw, 15px);
    line-height: 1.8;
    margin-bottom: 8px;
}
.footer a {
    color: #1DA1F2;
}
.footer a:hover {
    text-decoration: underline;
}

/* 媒体查询 - 针对小手机、平板精细优化 */
@media (max-width: 768px) {
    .head-box {
        flex-direction: column;
        gap: 15px;
    }
    .nav-menu {
        justify-content: center;
    }
    .section {
        padding: 40px 0;
    }
    .flow-wrap {
        gap: 20px;
    }
    .flow-item {
        width: 140px;
    }
}
@media (max-width: 480px) {
    .btn-group {
        flex-direction: column;
    }
    .btn-white, .btn-trans {
        text-align: center;
    }
    .data-list {
        justify-content: center;
    }
    .flow-item {
        width: 100%;
    }
}