/* ============ 机构简介 / 关于我们 ============ */
.about{
    padding: 96px 0;
    background:
        radial-gradient(600px 300px at 90% 10%, rgba(46,107,230,.08) 0%, transparent 70%),
        radial-gradient(500px 300px at 5% 90%, rgba(255,122,69,.08) 0%, transparent 70%),
        #fff;
}

/* 通用 section 标题区 */
.section-head{
    text-align: center;
    max-width: 780px;
    margin: 0 auto 56px;
}
.section-head .eyebrow{
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: rgba(46,107,230,.08);
    color: var(--color-primary);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 16px;
}
.section-head .eyebrow::before{
    content:"";
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--color-primary);
}
.section-head h2{
    font-size: clamp(26px, 3.2vw, 40px);
    line-height: 1.25;
    letter-spacing: -0.3px;
    margin-bottom: 18px;
}
.section-head h2 .accent{
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.section-head .lead{
    font-size: 16px;
    color: var(--color-text-light);
    line-height: 1.75;
}

/* 网格布局：左对比卡，右流程步骤 */
.about-grid{
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    gap: 48px;
    align-items: stretch;
}

/* ---- 左侧对比 ---- */
.compare{
    position: relative;
    display: grid;
    gap: 18px;
    padding: 32px;
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}
.compare-card{
    padding: 24px 22px;
    border-radius: var(--radius-md);
    position: relative;
}
.compare-others{
    background: #F9FAFB;
    border: 1px solid var(--color-border);
}
.compare-ours{
    background: linear-gradient(135deg, #EEF4FF 0%, #FFF3EB 100%);
    border: 1px solid rgba(46,107,230,.25);
    box-shadow: 0 10px 30px rgba(46,107,230,.08);
}
.compare-label{
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 14px;
}
.compare-others .compare-label{
    background: #E5E7EB;
    color: #6B7280;
}
.compare-ours .compare-label{
    background: var(--color-primary);
    color: #fff;
}
.compare-card ul{
    display: grid;
    gap: 10px;
}
.compare-card li{
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 15px;
    color: var(--color-text);
    line-height: 1.55;
}
.compare-card .x,
.compare-card .v{
    flex-shrink: 0;
    width: 22px; height: 22px;
    border-radius: 50%;
    display: grid; place-items: center;
    font-size: 13px;
    font-weight: 700;
}
.compare-card .x{ background: #FEE2E2; color: #DC2626; }
.compare-card .v{ background: var(--color-primary); color: #fff; }
.compare-others li{ color: var(--color-text-light); }

.vs{
    position: absolute;
    left: 50%; top: 50%;
    transform: translate(-50%, -50%);
    width: 52px; height: 52px;
    border-radius: 50%;
    background: #fff;
    border: 2px solid var(--color-accent);
    color: var(--color-accent);
    display: grid; place-items: center;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 1px;
    box-shadow: 0 6px 18px rgba(255,122,69,.3);
    z-index: 2;
}

/* ---- 右侧流程 ---- */
.loop{
    padding: 32px;
    background: linear-gradient(160deg, var(--color-primary) 0%, #1B50BF 100%);
    border-radius: var(--radius-lg);
    color: #fff;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}
.loop::before{
    content:"";
    position: absolute;
    right: -60px; top: -60px;
    width: 220px; height: 220px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,255,255,.15), transparent 70%);
    pointer-events: none;
}
.loop-title{
    font-size: 15px;
    font-weight: 500;
    opacity: .9;
    margin-bottom: 22px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.loop-title::before{
    content:"";
    width: 20px; height: 2px;
    background: #fff; opacity: .8;
}
.loop-steps{
    display: grid;
    gap: 20px;
    position: relative;
}
.loop-steps li{
    display: flex;
    gap: 16px;
    align-items: flex-start;
    padding: 16px 18px;
    background: rgba(255,255,255,.08);
    border: 1px solid rgba(255,255,255,.14);
    border-radius: var(--radius-md);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: transform .25s var(--ease), background .25s var(--ease);
}
.loop-steps li:hover{
    transform: translateX(4px);
    background: rgba(255,255,255,.14);
}
.step-num{
    flex-shrink: 0;
    font-size: 24px;
    font-weight: 800;
    line-height: 1;
    color: #fff;
    opacity: .5;
    letter-spacing: -0.5px;
    min-width: 36px;
}
.step-body strong{
    display: block;
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 4px;
}
.step-body p{
    font-size: 13.5px;
    line-height: 1.6;
    opacity: .85;
    margin: 0;
}

/* ---- 底部 CTA ---- */
.about-cta{
    margin-top: 56px;
    text-align: center;
}
.about-cta p{
    font-size: 16px;
    color: var(--color-text-light);
    margin-bottom: 16px;
}
.about-cta p strong{
    color: var(--color-accent);
    font-size: 22px;
    font-weight: 800;
    margin: 0 6px;
    vertical-align: -2px;
}

/* ---- 响应式 ---- */
@media (max-width: 960px){
    .about{ padding: 72px 0; }
    .about-grid{
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .vs{ width: 44px; height: 44px; font-size: 12px; }
}
@media (max-width: 600px){
    .about{ padding: 56px 0; }
    .compare, .loop{ padding: 22px; }
    .section-head{ margin-bottom: 40px; }
    .step-num{ font-size: 20px; min-width: 28px; }
    .step-body strong{ font-size: 15px; }
}

/* ---- 公司简介补充卡片 ---- */
.company-intro-card{
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(260px, .65fr);
    gap: 28px;
    align-items: stretch;
    margin: 0 0 42px;
    padding: 30px;
    background: rgba(255,255,255,.92);
    border: 1px solid rgba(46,107,230,.14);
    border-radius: var(--radius-lg);
    box-shadow: 0 18px 48px -34px rgba(15,23,42,.35);
}
.company-intro-card .intro-copy h3{
    font-size: 24px;
    line-height: 1.35;
    margin-bottom: 14px;
    color: var(--color-text);
}
.company-intro-card .intro-copy p{
    font-size: 15.5px;
    line-height: 1.85;
    color: var(--color-text-light);
    margin: 0 0 12px;
}
.company-intro-card .intro-copy p:last-child{ margin-bottom: 0; }
.intro-stats{
    display: grid;
    gap: 12px;
}
.intro-stats div{
    padding: 18px 20px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, #EEF4FF 0%, #FFF7ED 100%);
    border: 1px solid rgba(46,107,230,.12);
}
.intro-stats strong{
    display: block;
    font-size: 24px;
    line-height: 1;
    color: var(--color-primary);
    margin-bottom: 8px;
}
.intro-stats span{
    font-size: 13.5px;
    color: var(--color-text-light);
}
@media (max-width: 900px){
    .company-intro-card{ grid-template-columns: 1fr; }
    .intro-stats{ grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 600px){
    .company-intro-card{ padding: 22px; }
    .intro-stats{ grid-template-columns: 1fr; }
    .company-intro-card .intro-copy h3{ font-size: 20px; }
}