/* === Hero Banner Carousel === */
.hero-banner {
    position: relative;
    min-height: 100vh;
    padding-top: 73px;
    overflow: hidden;
    background: #000;
}
.banner-slides {
    position: absolute;
    inset: 0;
}
.banner-slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    transform: scale(1.04);
}
/* ponytail: responsive banner, 768/1280/1920 variants; full-size only on wide screens */
.banner-slide.banner-1 { background-image: url('../images/APPbanner-1.webp'); }
.banner-slide.banner-2 { background-image: url('../images/APPbanner-2.webp'); }
.banner-slide.banner-3 { background-image: url('../images/APPbanner-3.webp'); }
@media (min-width: 769px) {
    .banner-slide.banner-1 { background-image: url('../images/index_banner_1_1280.webp'); }
    .banner-slide.banner-2 { background-image: url('../images/index_banner_2_1280.webp'); }
    .banner-slide.banner-3 { background-image: url('../images/index_banner_3_1280.webp'); }
}
@media (min-width: 1281px) {
    .banner-slide.banner-1 { background-image: url('../images/index_banner_1.webp'); }
    .banner-slide.banner-2 { background-image: url('../images/index_banner_2.webp'); }
    .banner-slide.banner-3 { background-image: url('../images/index_banner_3.webp'); }
}
/* 移动端竖版 banner：下移避开 fixed 导航(高75px)遮挡，顶部留白区与 header 背景一致 */
@media (max-width: 768px) {
    .hero-banner { background: #fff; }
    .banner-slides { top: 75px; }
}
.banner-slide.active {
    opacity: 1;
    transform: scale(1);
    transition: opacity 1s ease-in-out, transform 6s ease-out;
}
.banner-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.25);
    color: #fff;
    font-size: 32px;
    line-height: 1;
    cursor: pointer;
    transition: background 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.banner-arrow:hover { background: rgba(0, 104, 221, 0.7); }
.banner-arrow-prev { left: 24px; }
.banner-arrow-next { right: 24px; }
.banner-dots {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    gap: 10px;
}
.banner-dot {
    width: 28px;
    height: 4px;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: background 0.3s, width 0.3s;
}
.banner-dot.active {
    background: #0068dd;
    width: 40px;
}

/* === Section Base === */
.section {
    padding: 80px 0 0 0;
    position: relative;
}

/* === Core Products Section === */
.products-header { text-align: center; margin-bottom: 48px; }
.products-header .tag {
    display: inline-block;
    background: #e8f0fe;
    border: 1px solid #0068dd;
    border-radius: 30px;
    padding: 4px 20px;
    font-size: 12px;
    color: #0068dd;
    margin-bottom: 16px;
}
.products-header .title {
    font-size: 40px;
    font-weight: 700;
    letter-spacing: 2.4px;
    background: linear-gradient(135deg, #00e5ff 18%, #0068dd 80%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
}
.products-header .desc {
    font-size: 20px;
    color: #000;
    line-height: 40px;
}

/* === Feature Block === */
.feature-block {
    display: flex;
    align-items: center;
    gap: 48px;
    margin-bottom: 90px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 40px;
}
.feature-block.reverse { flex-direction: row-reverse; }
.feature-text { flex: 1; max-width: 680px; }
.feature-image { flex: 1; }
.feature-image img {
    width: 100%;
    border-radius: 60px;
    box-shadow: 15px -10px 4px 0px rgba(0,104,221,0.05);
}
.feature-label {
    font-size: 30px;
    font-weight: 600;
    margin-bottom: 6px;
}
.feature-label .gradient-text {
    background: linear-gradient(90deg, #00CFFF, #0066FF);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.feature-label .gradient-text-ai {
    background: linear-gradient(90deg, #00D4FF, #0052CC);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.feature-title {
    font-size: 24px;
    font-weight: 600;
    color: #000;
    margin-bottom: 12px;
}
.feature-desc {
    font-size: 16px;
    line-height: 30px;
    color: #000;
    margin-bottom: 12px;
}
.feature-list {
    font-size: 16px;
    line-height: 30px;
    color: #000;
}
.feature-list li::before {
    content: "✓ ";
    color: #0068dd;
}
.feature-bottom { width: 100%; }
.feature-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: #0068dd;
    color: #fff;
    padding: 12px 30px;
    border-radius: 8px;
    font-size: 16px;
    margin-top: 16px;
    transition: background 0.3s;
}
.feature-btn:hover { background: #0055b3; }

/* === CRM Section === */
.crm-section {
    display: flex;
    align-items: flex-start;
    gap: 48px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px 80px;
}
.crm-left { flex: 1; max-width: 720px; }
.crm-right { flex: 1; max-width: 720px; }
.crm-card {
    background: rgba(253,254,255,0.7);
    border-radius: 49px;
    padding: 32px;
}
.crm-card-image {
    width: 100%;
    height: auto;
    border-radius: 16px;
    margin-top: 16px;
}
.crm-card-title {
    font-size: 20px;
    color: #0068dd;
    text-align: center;
    font-weight: 400;
}
.crm-card-desc {
    font-size: 16px;
    color: #0068dd;
    text-align: center;
    line-height: 36px;
    margin-top: 16px;
}
.crm-list { display: flex; flex-direction: column; gap: 6px; }
.crm-list-item {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(253,254,255,0.7);
    border-radius: 16px;
    padding: 12px 20px;
    cursor: pointer;
    transition: background 0.3s;
}
.crm-list-item.active { background: rgba(253,254,255,0.7); }
.crm-list-item:hover { background: rgba(253,254,255,0.9); }
.crm-list-item .icon {
    width: 36px;
    height: 36px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.crm-list-item .icon img { width: 36px; height: 36px; }
.crm-list-item .info { flex: 1; }
.crm-list-item .info .name {
    font-size: 20px;
    color: #333;
}
.crm-list-item.active .info .name { color: #0068dd; }
.crm-list-item .info .brief {
    display: none;
    font-size: 16px;
    color: #444;
    line-height: 24px;
    margin-top: 4px;
}
.crm-list-item.active .info .brief {
    display: block;
}
.crm-list-item .link {
    font-size: 12px;
    color: #0068dd;
    flex-shrink: 0;
}

/* === Clients Section === */
.clients-section { text-align: center; }
.clients-section .title {
    font-size: 40px;
    font-weight: 700;
    letter-spacing: 6px;
    background: linear-gradient(135deg, #00e5ff, #0068dd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}
.clients-section .subtitle {
    font-size: 20px;
    color: #000;
    line-height: 40px;
    margin-bottom: 32px;
}
.client-logos-wrapper {
    overflow: hidden;
    margin-bottom: 60px;
}
.client-logos-wrapper:hover .client-logos-track {
    animation-play-state: paused;
}
.client-logos-track {
    display: flex;
    align-items: center;
    animation: clientMarquee 60s linear infinite;
    width: max-content;
}
.client-logos-track img {
    height: 60px;
    width: auto;
    flex-shrink: 0;
    margin: 0 18px;
}
@keyframes clientMarquee {
    0%   { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* === Stats === */
.stat-item { text-align: center; }
.stat-number {
    font-size: 44px;
    font-weight: 700;
    background: linear-gradient(135deg, #00e5ff, #0068dd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stat-unit {
    font-size: 20px;
    color: #000;
    display: inline;
}
.stat-label {
    font-size: 20px;
    color: #000;
    line-height: 40px;
}

/* === About Section === */
.about-section {
    position: relative;
    min-height: 540px;
    overflow: hidden;
}
.about-section img.full-bg {
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.about-section .content {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: #000;
    text-align: center;
    padding: 30px 20px;
}
.about-section .content .about-main-title {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #00e5ff, #0068dd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.about-section .content .about-body {
    display: flex;
    gap: 60px;
    max-width: 1000px;
    width: 100%;
    text-align: left;
    flex: 1;
}
.about-section .content .about-left {
    flex: 1.3;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.about-section .content .about-right {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px 40px;
    align-content: center;
}
.about-section .content .about-subtitle {
    font-size: 26px;
    font-weight: 600;
    letter-spacing: 4px;
    color: #000;
    margin-bottom: 16px;
}
.about-section .content .about-desc {
    font-size: 16px;
    line-height: 30px;
    color: #000;
    text-indent: 2em;
}

/* === Responsive === */
@media (max-width: 1024px) {
    .feature-block { flex-direction: column !important; gap: 24px; }
    .crm-section { flex-direction: column; }
    .about-section .content .about-body { flex-direction: column; align-items: center; }
    .about-section .content .about-right { grid-template-columns: 1fr 1fr; }
    .products-header .title { font-size: 30px; }
    .clients-section .title { font-size: 30px; }
}

@media (max-width: 768px) {
    .about-section { overflow: visible; }
    .about-section .content .about-body { gap: 24px; }
    .feature-title { font-size: 24px; }
    .feature-label { font-size: 24px; }
    .feature-desc { font-size: 15px; line-height: 24px; }
    .feature-list { font-size: 15px; line-height: 24px; }
    .feature-bottom { display: flex; flex-direction: column; gap: 12px; }
    .feature-bottom .feature-btn { align-self: flex-end; font-size: 12px; padding: 6px 14px; margin-top: 0; }
    .products-header .title,
    .clients-section .title { font-size: 24px; }
    .products-header .desc { font-size: 16px; line-height: 28px; }
    .client-logos-track img { height: 48px; }
    .about-section .content .about-right { grid-template-columns: 1fr 1fr; gap: 16px 24px; }
    .stat-number { font-size: 36px; }
    .crm-card { padding: 16px; }
    .crm-list-item { padding: 10px 14px; flex-wrap: wrap; }
    .crm-list-item .info .name { font-size: 16px; }
    .about-section .content .about-main-title { font-size: 24px; }
    .about-section .content .about-subtitle { font-size: 20px; }
    .about-section .content .about-desc { font-size: 15px; line-height: 28px; text-indent: 1.5em; }
    .banner-arrow { width: 36px; height: 36px; font-size: 24px; }
    .banner-arrow-prev { left: 12px; }
    .banner-arrow-next { right: 12px; }
}

@media (max-width: 480px) {
    .products-header .title,
    .clients-section .title { font-size: 22px; letter-spacing: 1px; }
    .products-header .desc { font-size: 15px; line-height: 26px; }
    .feature-block { padding: 0 16px; gap: 16px; }
    .feature-title { font-size: 20px; }
    .feature-label { font-size: 20px; }
    .feature-desc { font-size: 14px; line-height: 22px; }
    .feature-list { font-size: 14px; line-height: 22px; }
    .feature-bottom { display: flex; flex-direction: column; gap: 10px; }
    .feature-bottom .feature-btn { align-self: flex-end; font-size: 12px; padding: 5px 12px; margin-top: 0; }
    .client-logos-track img { height: 36px; margin: 0 10px; }
    .crm-section { padding: 0 16px 60px; }
    .crm-card-desc { font-size: 14px; line-height: 24px; }
    .crm-list-item { padding: 8px 12px; }
    .crm-list-item .info .name { font-size: 14px; }
    .stat-number { font-size: 28px; }
    .stat-label { font-size: 14px; line-height: 24px; }
    .about-section .content .about-main-title { font-size: 22px; }
    .about-section .content .about-subtitle { font-size: 18px; }
    .about-section .content .about-desc { font-size: 14px; line-height: 24px; }
    .about-section .content { padding: 20px 16px; }
    .hero-banner { min-height: 90vh; }
}