/* ===== Hero ===== */
.about-hero {
    background: linear-gradient(145deg, #0f172a 0%, #1e3a5f 50%, #1e40af 100%);
    padding: 80px 0 100px;
    color: #fff;
    position: relative;
    overflow: hidden;
    text-align: center;
}
.about-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
            linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
            linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
}
.about-hero .container { position: relative; z-index: 2; }
.about-hero-title {
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}
.about-hero-desc {
    font-size: 17px;
    color: rgba(255,255,255,0.7);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ===== 理念卡片 ===== */
.philosophy-section {
    margin-top: -60px;
    position: relative;
    z-index: 10;
    margin-bottom: 64px;
}
.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
@media (max-width: 768px) {
    .philosophy-grid { grid-template-columns: 1fr; }
}
.philosophy-card {
    background: #fff;
    border-radius: 16px;
    padding: 36px 28px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.08);
    text-align: center;
    transition: all 0.3s ease;
}
.philosophy-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0,0,0,0.12);
}
.philosophy-icon {
    width: 60px; height: 60px;
    border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 20px;
    font-size: 24px;
    color: #fff;
}
.philosophy-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 10px;
}
.philosophy-card p {
    font-size: 14px;
    color: #64748b;
    line-height: 1.7;
}

/* ===== 内容区 ===== */
.about-section {
    padding: 48px 0;
}
.about-section-title {
    font-size: 28px;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 8px;
    text-align: center;
}
.about-section-sub {
    font-size: 15px;
    color: #94a3b8;
    text-align: center;
    margin-bottom: 48px;
}

/* 关于内容 */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}
@media (max-width: 768px) {
    .about-content { grid-template-columns: 1fr; gap: 32px; }
}
.about-content h3 {
    font-size: 22px;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 16px;
}
.about-content p {
    font-size: 15px;
    color: #475569;
    line-height: 1.8;
    margin-bottom: 16px;
}
.about-visual {
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
    border-radius: 16px;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}
.about-visual::before {
    content: '';
    position: absolute;
    width: 200px; height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(37,99,235,0.1) 0%, transparent 70%);
}
.about-visual i {
    font-size: 80px;
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ===== 数据展示 ===== */
.data-section {
    background: #f8fafc;
    padding: 64px 0;
}
.data-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
@media (max-width: 768px) {
    .data-grid { grid-template-columns: repeat(2, 1fr); }
}
.data-card {
    text-align: center;
    padding: 32px;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    transition: all 0.3s ease;
}
.data-card:hover {
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    transform: translateY(-2px);
}
.data-number {
    font-size: 36px;
    font-weight: 800;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
    font-family: "DIN Alternate", "DIN", "Helvetica Neue", Arial, sans-serif;
}
.data-label {
    font-size: 14px;
    color: #64748b;
}
/* ===== 联系我们 ===== */
.contact-section {
    background: linear-gradient(135deg, #f8fafc, #f1f5f9);
    padding: 64px 0;
}
.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}
@media (max-width: 768px) {
    .contact-grid { grid-template-columns: 1fr; }
}
.contact-card {
    text-align: center;
    padding: 36px 24px;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    transition: all 0.3s ease;
}
.contact-card:hover {
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}
.contact-icon {
    width: 56px; height: 56px;
    border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 16px;
    font-size: 22px;
    color: #fff;
}
.contact-card h4 {
    font-size: 16px;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 8px;
}
.contact-card p {
    font-size: 14px;
    color: #64748b;
    line-height: 1.6;
}
.contact-card a {
    color: #2563eb;
    font-weight: 500;
}
.contact-card a:hover {
    text-decoration: underline;
}