/* ============================================
   腾隍纽扣 - 走进腾隍（关于页）样式
   ============================================ */

*, *::before, *::after {
    box-sizing: border-box;
}

html {
    overflow-x: hidden;
}

body {
    overflow-x: hidden !important;
}

.about-hero {
    position: relative;
    min-height: 420px;
    display: flex;
    align-items: center;
    padding: 70px 0;
    overflow: hidden;
}

@media (max-width: 767.98px) {
    .about-hero {
        min-height: 280px;
        padding: 50px 0;
    }
}

.about-hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    filter: saturate(1.05);
    transform: scale(1.02);
}

/* 蒙版层：渐变遮罩 */
.about-hero-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(90deg, rgba(31, 45, 58, 0.92), rgba(31, 45, 58, 0.55), rgba(31, 45, 58, 0.92)),
        radial-gradient(ellipse at 50% 0%, rgba(106, 121, 217, 0.35), transparent 60%);
    z-index: 1;
}

.about-hero-content {
    position: relative;
    z-index: 2;
    color: #fff;
}

.about-hero-content h1 {
    font-family: 'AlibabaPuHuiTi', sans-serif;
    font-size: clamp(2rem, 4vw, 3.4rem);
    font-weight: 900;
    letter-spacing: 0.03em;
    margin-bottom: 18px;
    text-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

.about-hero-content p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    opacity: 0.95;
    line-height: 1.8;
    margin: 0;
}

/* sticky 导航下，锚点滚动避免被遮挡 */
#profile,
#history,
#culture {
    scroll-margin-top: 92px;
}

/* 1. 腾隍概况 */
.about-overview {
    padding: 90px 0;
    background: #ffffff;
}

.about-overview-carousel {
    width: 100%;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
    background: transparent;
    position: relative;
}

.about-overview-carousel .swiper-slide {
    height: 650px;
    position: relative;
}

.about-overview-carousel img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transform: none;
}

.about-overview-content h2 {
    font-family: 'AlibabaPuHuiTi', sans-serif;
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--text-dark);
    margin-bottom: 18px;
}

.about-overview-content .divider {
    width: 80px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 2px;
    margin-bottom: 22px;
}

.about-overview-content p {
    color: var(--text-dark);
    line-height: 1.9;
    font-size: 1.03rem;
    margin-bottom: 18px;
}

/* 轮播按钮/分页样式（避免和首页 banner 冲突） */
.about-overview-carousel .swiper-button-next,
.about-overview-carousel .swiper-button-prev {
    color: #fff;
    background: rgba(0, 0, 0, 0.25);
    width: 46px;
    height: 46px;
    border-radius: 50%;
    top: 50%;
    transform: translateY(-50%);
}

.about-overview-carousel .swiper-button-next::after,
.about-overview-carousel .swiper-button-prev::after {
    font-size: 18px;
}

.about-overview-carousel .swiper-pagination {
    bottom: 18px;
}

.about-overview-carousel .swiper-pagination-bullet {
    width: 10px;
    height: 10px;
    background: rgba(106, 121, 217, 0.36);
    opacity: 1;
}

.about-overview-carousel .swiper-pagination-bullet-active {
    opacity: 1;
    width: 28px;
    border-radius: 8px;
    background: var(--primary-color);
}

@media (max-width: 767.98px) {
    .about-overview-carousel .swiper-button-next,
    .about-overview-carousel .swiper-button-prev {
        width: 36px;
        height: 36px;
    }

    .about-overview-carousel .swiper-button-next::after,
    .about-overview-carousel .swiper-button-prev::after {
        font-size: 14px;
    }
}

@media (max-width: 991.98px) {
    .about-overview-carousel .swiper-slide {
        height: auto;
        aspect-ratio: 16 / 10; /* 采用比例而非固定高度，适配不同屏幕 */
    }
}

@media (max-width: 575.98px) {
    .about-overview-carousel .swiper-slide {
        aspect-ratio: 4 / 3;
    }
}

/* 2. 发展历程：横版步骤条 */
.about-history {
    padding: 80px 0 95px;
    background: #f8f9fa;
}

.about-stepper {
    margin-top: 24px;
    position: relative;
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding-bottom: 8px;
}

.about-stepper::before {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    top: 7px;
    height: 2px;
    background: linear-gradient(90deg, rgba(106, 121, 217, 0), rgba(106, 121, 217, 0.55), rgba(106, 121, 217, 0));
    z-index: 0;
}

.about-step {
    flex: 1 1 0;
    min-width: 165px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.about-step-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--primary-color);
    margin: 0 auto 14px;
    box-shadow: 0 0 0 6px rgba(106, 121, 217, 0.14);
}

.about-step-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 18px 16px;
    box-shadow: 0 14px 40px rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(106, 121, 217, 0.12);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.about-step:hover .about-step-card {
    transform: translateY(-6px);
    box-shadow: 0 20px 55px rgba(106, 121, 217, 0.18);
}

.about-step-card h4 {
    font-family: 'AlibabaPuHuiTi', sans-serif;
    font-weight: 900;
    color: var(--primary-color);
    margin: 0 0 10px;
    font-size: 1.15rem;
}

.about-step-card p {
    margin: 0;
    color: #6c757d;
    line-height: 1.85;
    font-size: 0.99rem;
}

@media (max-width: 991.98px) {
    .about-stepper {
        flex-wrap: wrap;
        gap: 14px;
    }

    .about-stepper::before {
        display: none;
    }

    .about-step {
        min-width: 220px;
        flex: 1 1 calc(50% - 7px);
    }
}

@media (max-width: 575.98px) {
    .about-step {
        flex: 1 1 100%;
        min-width: 0;
    }
}

/* 3. 企业文化 */
.about-culture {
    padding: 90px 0 110px;
    background: #ffffff;
}

.culture-card {
    height: 100%;
    background: #ffffff;
    border-radius: 16px;
    padding: 28px 24px;
    box-shadow: 0 18px 60px rgba(0, 0, 0, 0.06);
    border: 1px solid rgba(106, 121, 217, 0.08);
    text-align: center;
}

.culture-card-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(106, 121, 217, 0.12);
    color: var(--primary-color);
    margin-bottom: 18px;
    margin-left: auto;
    margin-right: auto;
}

.culture-card-icon i {
    font-size: 1.6rem;
}

.culture-card h3 {
    font-family: 'AlibabaPuHuiTi', sans-serif;
    font-size: 1.55rem;
    font-weight: 900;
    color: var(--text-dark);
    margin: 0 0 12px;
}

.culture-card p {
    margin: 0;
    color: #6c757d;
    line-height: 1.9;
    font-size: 1.02rem;
    text-align: center;
}

.culture-card h3 {
    text-align: center;
}

.values-title {
    margin: 58px 0 22px;
    text-align: center;
    font-family: 'AlibabaPuHuiTi', sans-serif;
    font-weight: 900;
    color: var(--text-dark);
    font-size: 1.6rem;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 18px;
}

.value-item {
    text-align: center;
    padding: 16px 10px;
    border-radius: 16px;
    border: 1px solid rgba(106, 121, 217, 0.10);
    background: linear-gradient(180deg, rgba(106, 121, 217, 0.04), rgba(106, 121, 217, 0.01));
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.value-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 18px 50px rgba(106, 121, 217, 0.18);
}

.value-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--primary-color), #5565cf);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.9rem;
}

.value-icon i {
    display: inline-block;
}

.value-name {
    font-family: 'AlibabaPuHuiTi', sans-serif;
    font-weight: 900;
    color: var(--text-dark);
    font-size: 1.05rem;
}

@media (max-width: 991.98px) {
    .values-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 575.98px) {
    .values-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .value-icon {
        width: 62px;
        height: 62px;
    }
}