.page-about {
    --about-accent: var(--accent-orange);
    --about-primary: var(--primary-blue);
    --about-bg: var(--bg-light);
    --about-text: var(--text-dark);
    --about-glass: var(--surface-glass);
    --about-radius: var(--radius-md);
    --about-shadow: var(--shadow-md);

    display: flex;
    flex-direction: column;
    gap: 0;
    min-height: 100%;
    background: var(--about-bg);
    color: var(--about-text);
    font-family: var(--font-body);
    padding-bottom: 3rem;
}

/* ========== 首屏 ========== */
.about-hero {
    position: relative;
    width: 100%;
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    background: var(--about-primary);
}

.about-hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.about-hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.about-hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 2.5rem 1.5rem;
    max-width: 800px;
    width: 100%;
    box-sizing: border-box;
}

.about-hero-label {
    display: inline-block;
    font-size: 0.85rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-light);
    background: var(--about-accent);
    padding: 0.3rem 1rem;
    border-radius: 999px;
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.about-hero-title {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1.2;
    color: var(--text-light);
    margin: 0 0 1rem;
    text-shadow: 0 2px 12px rgba(0,0,0,0.2);
}

.about-hero-desc {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
    opacity: 0.9;
}

/* ========== 内容包装器 ========== */
.about-section-wrapper {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    padding: 2rem 1.25rem;
    max-width: 1200px;
    margin: -3rem auto 0;
    position: relative;
    z-index: 2;
    width: 100%;
    box-sizing: border-box;
}

/* ========== 章节通用 ========== */
.about-section {
    scroll-margin-top: 80px;
}

.about-section-header {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 3px solid var(--gradient-primary);
}

.about-section-header .section-number {
    font-family: var(--font-heading);
    font-size: 2.8rem;
    font-weight: 900;
    line-height: 1;
    color: var(--about-accent);
    transition: transform var(--transition-med) ease;
}

.about-section-header .section-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--about-text);
    margin: 0;
}

/* ========== 品牌概述 ========== */
.about-card {
    padding: 1.75rem;
    border-radius: var(--radius-md);
    background: var(--about-glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border-subtle);
    box-shadow: var(--about-shadow);
}

.about-card-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--about-text);
    margin: 0;
}

.about-meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1.25rem;
}

.about-meta-link {
    color: var(--about-accent);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.about-meta-link:hover {
    color: var(--about-primary);
    text-decoration: underline;
}

/* ========== 服务卡片 ========== */
.about-services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.about-service-card {
    padding: 1.75rem;
    border-radius: var(--radius-md);
    background: var(--about-glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border-subtle);
    box-shadow: var(--about-shadow);
    text-align: center;
    transition: transform var(--transition-med) ease, box-shadow var(--transition-med) ease;
}

.about-service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.about-service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    overflow: hidden;
    background: var(--about-bg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-icon-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.about-service-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 0.5rem;
    color: var(--about-text);
}

.about-service-desc {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--about-text);
    opacity: 0.85;
    margin: 0 0 1rem;
}

.about-service-link {
    display: inline-block;
    color: var(--about-accent);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.about-service-link:hover {
    color: var(--about-primary);
    text-decoration: underline;
}

/* ========== 每周更新 ========== */
.about-update-wrapper {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding: 1.75rem;
    border-radius: var(--radius-md);
    background: var(--about-glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border-subtle);
    box-shadow: var(--about-shadow);
}

.about-update-visual {
    width: 100%;
    max-width: 200px;
    margin: 0 auto;
}

.about-update-img {
    width: 100%;
    height: auto;
    object-fit: contain;
    display: block;
}

.about-update-content {
    flex: 1;
}

.about-update-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--about-text);
    margin: 0 0 1rem;
}

.about-update-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.about-update-list li {
    position: relative;
    padding-left: 1.5rem;
    font-size: 0.95rem;
    color: var(--about-text);
    font-weight: 500;
}

.about-update-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--about-accent);
    font-weight: 700;
}

/* ========== 响应式：窄屏优化 ========== */
@media (max-width: 640px) {
    .about-hero {
        min-height: 40vh;
    }

    .about-hero-content {
        padding: 2rem 1rem;
    }

    .about-hero-title {
        font-size: 1.6rem;
    }

    .about-section-wrapper {
        padding: 1.25rem 1rem;
        margin-top: -2rem;
        gap: 2rem;
    }

    .about-section-header .section-number {
        font-size: 2.2rem;
    }

    .about-section-header .section-title {
        font-size: 1.25rem;
    }

    .about-card,
    .about-service-card,
    .about-update-wrapper {
        padding: 1.25rem;
    }

    .about-service-icon {
        width: 64px;
        height: 64px;
    }

    .about-update-list {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* ========== 桌面端 ========== */
@media (min-width: 768px) {
    .about-hero {
        min-height: 55vh;
        border-radius: 0 0 var(--radius-lg) 0;
    }

    .about-hero-title {
        font-size: 3rem;
    }

    .about-section-wrapper {
        padding: 3rem 2.5rem;
        margin-top: -4rem;
        gap: 4rem;
    }

    .about-section-header .section-number {
        font-size: 3.5rem;
    }

    .about-section-header .section-title {
        font-size: 1.75rem;
    }

    .about-card {
        padding: 2.5rem;
    }

    .about-services-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
    }

    .about-service-card {
        padding: 2rem;
    }

    .about-service-icon {
        width: 100px;
        height: 100px;
    }

    .about-update-wrapper {
        flex-direction: row;
        align-items: center;
        padding: 2.5rem;
    }

    .about-update-visual {
        max-width: 180px;
        margin: 0;
    }

    .about-meta-row {
        gap: 1.5rem;
    }

    .about-update-list {
        gap: 1rem;
    }
}

/* ========== 滚动显现动画 ========== */
.about-section[data-reveal] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity var(--transition-slow) ease, transform var(--transition-slow) ease;
}

.about-section[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

.about-section[data-reveal] .section-number {
    transition: transform var(--transition-med) ease;
}

.about-section[data-reveal].revealed .section-number {
    transform: scale(1.08);
}

.about-service-card[data-reveal] {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity var(--transition-med) ease, transform var(--transition-med) ease;
}

.about-service-card[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    .about-section[data-reveal],
    .about-service-card[data-reveal] {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .about-service-card:hover {
        transform: none;
    }
}