/* ============ Hero 区域 ============ */
.hero-about {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 80px 24px 50px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.hero-about h1 {
    font-size: clamp(2.2rem, 5vw, 3.2rem);
    font-weight: 800;
    letter-spacing: -1.2px;
    line-height: 1.15;
    margin-bottom: 16px;
    color: var(--text-slate-900);
}
.hero-about h1 .gradient-text {
    background: linear-gradient(135deg, #2563eb, #6366f1, #06b6d4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}
.hero-about p {
    font-size: 1.05rem;
    color: var(--text-slate-500);
    max-width: 620px;
    margin-bottom: 32px;
    line-height: 1.7;
}

/* ============ 公司介绍卡片 ============ */
.intro-section {
    position: relative;
    z-index: 1;
    padding: 20px 24px 60px;
    max-width: 900px;
    margin: 0 auto;
}
.intro-card {
    background: #fff;
    border: 1px solid #e8ecf1;
    border-radius: var(--radius-xl);
    padding: 36px 32px;
    box-shadow: var(--shadow-md);
    line-height: 1.8;
    color: var(--text-slate-700);
    font-size: 0.95rem;
}
.intro-card p { margin-bottom: 16px; }
.intro-card p:last-child { margin-bottom: 0; }
.intro-card .highlight { color: var(--blue-600); font-weight: 600; }
.intro-card .company-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-slate-900);
}

/* ============ 产品卡片 ============ */
.products-section {
    position: relative;
    z-index: 1;
    padding: 30px 24px 60px;
    max-width: 1000px;
    margin: 0 auto;
}
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}
.product-card {
    background: #fff;
    border: 1px solid #e8ecf1;
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    display: block;
}
.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: #cbd5e1;
}
.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    opacity: 0;
    transition: opacity 0.3s;
    border-radius: 3px 3px 0 0;
}
.product-card:hover::before { opacity: 1; }
.product-card.card-bird::before { background: linear-gradient(90deg, #2563eb, #6366f1); }
.product-card.card-cloud::before { background: linear-gradient(90deg, #059669, #10b981); }
.product-card.card-send::before { background: linear-gradient(90deg, #d97706, #f59e0b); }
.product-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    font-size: 1.4rem;
}
.product-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-slate-900);
}
.product-card .product-domain {
    font-size: 0.85rem;
    color: var(--blue-600);
    font-weight: 600;
    margin-bottom: 8px;
    display: block;
}
.product-card p {
    font-size: 0.88rem;
    color: var(--text-slate-500);
    line-height: 1.55;
}

/* ============ 理念区域 ============ */
.values-section {
    position: relative;
    z-index: 1;
    padding: 30px 24px 60px;
    max-width: 1000px;
    margin: 0 auto;
}
.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}
.value-card {
    background: #fff;
    border: 1px solid #e8ecf1;
    border-radius: var(--radius-lg);
    padding: 28px 22px;
    text-align: center;
    transition: var(--transition);
}
.value-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: #cbd5e1;
}
.value-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
    font-size: 1.3rem;
}
.value-card h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-slate-900);
}
.value-card p {
    font-size: 0.85rem;
    color: var(--text-slate-500);
    line-height: 1.5;
}

/* 宣传语 */
.slogan-box {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    border: 1px solid #bfdbfe;
    border-radius: var(--radius-xl);
    padding: 28px 24px;
    text-align: center;
    margin-top: 32px;
    color: var(--text-slate-700);
    font-size: 1rem;
    font-weight: 500;
}
.slogan-box .slogan-main {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--blue-700);
    margin-bottom: 6px;
}
.slogan-box .slogan-sub {
    color: var(--text-slate-500);
    font-size: 0.9rem;
}

.section-sub {
    margin-bottom: 36px;
    max-width: 580px;
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 768px) {
    .hero-about { padding: 50px 16px 30px; }
    .hero-about h1 { font-size: 1.8rem; }
    .intro-card { padding: 24px 18px; }
}