/* ========== 全局样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    -webkit-text-size-adjust: none;
}

html, body {
    width: 100%;
    height: auto;
    overflow-x: hidden;
    font-family: "PingFang SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: #000;
    scroll-behavior: smooth;
}

a { text-decoration: none; color: inherit; }
ul { list-style-type: none; }

/* ========== Header 导航栏 ========== */
.header {
    width: 100%;
    min-width: 1440px;
    position: fixed;
    top: 0;
    z-index: 9999;
    backdrop-filter: blur(100px);
    -webkit-backdrop-filter: blur(100px);
    background: rgba(255, 255, 255, 0.35);
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    box-shadow: 0 4px 27.4px 0 rgba(198, 219, 255, 0.23);
    transition: transform 0.5s cubic-bezier(0.68, -0.55, 0.27, 1.55);
}

.header_content {
    position: relative;
    margin: 0 auto;
    width: 1200px;
    height: 72px;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
}

.header_logo {
    width: 167px;
    height: auto;
    display: block;
    cursor: pointer;
    object-fit: contain;
    border: none;
    outline: none;
}

.header_logo_link {
    display: block;
    text-decoration: none;
    border: none;
    outline: none;
}

.header_logo:hover {
    opacity: 0.9;
}

.header_nav {
    display: flex;
    flex-direction: row;
    position: relative;
    align-items: center;
}

.header_nav_list {
    height: 32px;
    display: flex;
    flex-direction: row;
    align-items: center;
}

.header_nav_item {
    margin-right: 40px;
    color: #4a4a4a;
    font-size: 13px;
    font-weight: 400;
    line-height: 18px;
    cursor: pointer;
    transition: color 0.3s;
}

.header_nav_item:hover { color: #205aef; }

.header_nav_item.active {
    color: #205aef;
    font-weight: 600;
}

.header_nav_item_content {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    margin-right: 0;
}

.header_qrcode {
    width: 118px;
    height: 118px;
    display: none;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 52px;
    background: #fff;
    padding: 8px;
    border-radius: 15px;
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.header_nav_item_content:hover .header_qrcode { display: block; }

.header_download_btn {
    width: 120px;
    height: 32px;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    border-radius: 100px;
    background: #205aef;
    cursor: pointer;
    transition: background-color 0.3s;
    margin-right: 0;
}

.header_download_btn:hover { background-color: #1a28bf; }

.header_download_btn .header_text {
    line-height: 16.8px;
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.1em;
}

/* ========== Hero Section 主视觉区 ========== */
.hero {
    width: 100%;
    min-width: 1440px;
    height: 945px;
    background-size: cover;
    background-position: 50%;
    background-repeat: no-repeat;
    background-color: #f5f7fa;
    position: relative;
}

.hero_wrapper_content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.hero_main_content {
    margin-top: 200px;
    width: 1200px;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
}

.hero_main_text {
    position: relative;
    display: flex;
    flex-direction: column;
}

.hero_title {
    display: flex;
    font-size: 48px;
    font-weight: 600;
    line-height: 84px;
    text-align: left;
    color: #000;
}

.hero_title_important {
    background: linear-gradient(96deg, #005dff -66.48%, #002bff -9.59%, #0086ed 26.84%, #56a8ff 58.61%, #935dff 96.62%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 60px;
    font-weight: 600;
    line-height: 84px;
    text-align: left;
}

.hero_subtitle {
    margin-top: 11px;
    margin-left: 5px;
    font-weight: 600;
    font-size: 19px;
    line-height: 26.6px;
    color: #000;
}

.hero_empty { height: 226px; }

.hero_download_btn {
    margin-top: 25px;
    position: relative;
    width: 262px;
    height: 80px;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    border-radius: 90px;
    background: #205aef;
    cursor: pointer;
    transition: all 0.3s;
}

.hero_download_btn:hover {
    background-color: #1a28bf;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(32, 90, 239, 0.3);
}

.hero_download_content {
    position: absolute;
    z-index: 999;
    display: flex;
    align-items: center;
    left: 43px;
}

.hero_download_icon {
    width: 32px;
    height: 32px;
    margin-right: 17px;
}

.hero_download_text {
    line-height: 39.2px;
    color: #fff;
    font-size: 28px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-align: left;
}

.hero_sub_title {
    margin-top: 23px;
    font-size: 16px;
    font-weight: 400;
    line-height: 15.65px;
    color: #205aef;
    cursor: pointer;
    margin-left: 68px;
}

.hero_sub_title:hover { text-decoration: underline; }

.hero_video {
    height: 420px;
    border-radius: 12px;
}

/* ========== 功能卡片 ========== */
.top-banner {
    position: relative;
    background-size: cover;
    background-position: 50%;
    background-repeat: no-repeat;
    background-color: #fff;
}

.top-banner_content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.top-banner_banner {
    width: 1200px;
    height: 172px;
    display: flex;
    flex-direction: row;
    justify-content: center;
    margin-top: 100px;
    margin-bottom: 60px;
}

.top-banner_item {
    width: 285px;
    display: flex;
    margin-right: 20px;
    flex-direction: column;
    padding: 20px;
    box-shadow: 0 4px 28px 0 rgba(0, 58, 159, 0.04);
    border-radius: 10px;
    background: #fff;
    cursor: pointer;
    transition: all 0.3s;
}

.top-banner_item:last-child { margin-right: 0; }

.top-banner_item:hover {
    box-shadow: 0 10px 30px 0 rgba(0, 58, 159, 0.1);
    transform: translateY(-5px);
}

.top-banner_logo {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
}

.top-banner_logo img {
    width: 30px;
    height: 30px;
}

.top-banner_title {
    font-size: 17px;
    font-weight: 500;
    line-height: 28px;
    text-align: left;
    color: #000;
    margin-top: 20px;
    margin-bottom: 11px;
}

.top-banner_desc {
    font-size: 14px;
    font-weight: 400;
    line-height: 22.4px;
    text-align: left;
    color: rgba(0, 0, 0, 0.6);
}

/* ========== 功能标题 ========== */
.main_title {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 74px;
    font-size: 56px;
    font-weight: 500;
    color: #000;
    line-height: 78.4px;
    text-align: center;
    margin-top: 90px;
    margin-bottom: 60px;
}

.main_title.margin { margin-top: 140px; }

/* ========== 功能详情区 ========== */
.content-item {
    height: 570px;
    width: 1200px;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    margin: 0 auto;
    margin-bottom: 140px;
}

.content-item_left {
    width: 366px;
    height: 290px;
}

.content-item_right {
    width: 820px;
    height: 570px;
}

.item_title {
    font-size: 40px;
    font-weight: 500;
    line-height: 56px;
    color: #000;
    margin-bottom: 16px;
}

.item_desc {
    font-size: 18px;
    font-weight: 400;
    line-height: 190%;
    color: #666;
}

.item_btn {
    display: flex;
    flex-direction: row;
    align-items: center;
    height: 78px;
    margin-top: 51px;
    font-size: 24px;
    font-weight: 400;
    color: #205aef;
    cursor: pointer;
    transition: opacity 0.3s;
}

.item_btn:hover { opacity: 0.8; }

.item_btn img {
    width: 24px;
    margin-left: 8px;
}

.item_image {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* ========== 用户评价区 ========== */
.feedback-wrapper {
    margin-top: 140px;
    margin-bottom: 40px;
    position: relative;
    height: 586px;
    background-image: url('https://m4.publicimg.browser.qq.com/publicimg/nav/pchome/bottombanner.png');
    background-size: cover;
    background-position: 50%;
    background-repeat: no-repeat;
}

.feedback_wrapper_content {
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 586px;
}

.feedback_main_content {
    width: 1200px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.feedback_main_text {
    width: 630px;
    height: 230px;
    background-repeat: no-repeat;
    background-position: 50%;
    background-size: cover;
    position: relative;
    display: flex;
    flex-direction: row;
}

.feedback_content {
    margin-left: 82px;
    margin-right: 68px;
    margin-top: 53px;
    display: flex;
    transition: opacity 1s;
    opacity: 1;
}

.feedback_content.fade_in { opacity: 1; }
.feedback_content.fade_out { opacity: 0; }

.feedback_avatar {
    width: 54px;
    height: 54px;
    border-radius: 27px;
}

.feedback_comment_content {
    display: flex;
    flex-direction: column;
    margin-left: 17px;
}

.feedback_name {
    font-size: 21.77px;
    font-weight: 400;
    line-height: 28.3px;
    text-align: left;
    color: #000;
}

.feedback_comment {
    font-size: 15.24px;
    font-weight: 400;
    line-height: 26.13px;
    text-align: left;
    color: #000;
    opacity: 0.5;
    margin-top: 10px;
}

/* ========== Footer 页脚 ========== */
.footer_wrapper {
    padding-bottom: 50px;
    background-color: #fff;
}

.footer {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer_text {
    color: #8f8f8f;
    text-align: center;
    font-size: 12px;
    font-weight: 400;
    line-height: 16px;
}

.footer_text a {
    color: #8f8f8f;
    transition: color 0.3s;
}

.footer_text a:hover { color: #205aef; }

.footer_text_spe { margin-top: 16px; }

/* ========== 滚动条美化 ========== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track { background: #f1f1f1; }

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover { background: #555; }

/* ========== 下载弹窗样式 ========== */
.download-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.download-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
}

.download-modal-content {
    position: relative;
    background: #fff;
    border-radius: 16px;
    width: 480px;
    max-width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    z-index: 1;
}

.download-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid #eee;
}

.download-modal-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin: 0;
}

.download-modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: #999;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s;
}

.download-modal-close:hover {
    background: #f5f5f5;
    color: #333;
}

.download-modal-body {
    padding: 24px;
}

.dl-item {
    display: flex;
    align-items: center;
    padding: 16px;
    background: #f8f9fa;
    border-radius: 12px;
    transition: all 0.3s;
}

.dl-item:hover {
    background: #eef2ff;
}

.dl-item-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    border-radius: 10px;
    margin-right: 16px;
}

.dl-item-info {
    flex: 1;
}

.dl-item-name {
    font-size: 15px;
    font-weight: 600;
    color: #333;
    margin-bottom: 4px;
}

.dl-item-meta {
    font-size: 13px;
    color: #888;
}

.dl-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: #205aef;
    color: #fff;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    white-space: nowrap;
}

.dl-btn:hover {
    background: #1a28bf;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(32, 90, 239, 0.4);
}

/* ========== 响应式 ========== */
@media (max-width: 1440px) {
    .hero_main_content,
    .top-banner_banner,
    .content-item {
        width: 90%;
        max-width: 1200px;
    }
}