/* ================================================================
   ABOUT PAGE — 关于我们专属样式
   ================================================================ */

/* ---------- About Hero ---------- */
.about-hero {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding: 140px 0 80px;
}
.about-hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}
.about-hero-gradient {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 30% 40%, rgba(240,160,80,0.07), transparent),
        radial-gradient(ellipse 40% 40% at 70% 60%, rgba(240,160,80,0.04), transparent),
        radial-gradient(ellipse 50% 50% at 50% 20%, rgba(240,160,80,0.05), transparent);
}
.about-hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse 65% 55% at 50% 45%, black, transparent);
    -webkit-mask-image: radial-gradient(ellipse 65% 55% at 50% 45%, black, transparent);
}
.about-hero-particles {
    position: absolute;
    inset: 0;
}
.about-particle {
    position: absolute;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0;
    animation: floatParticle 8s infinite ease-in-out;
}
.ap1 { width: 4px; height: 4px; top: 15%; left: 10%; animation-delay: 0s; opacity: 0.25; }
.ap2 { width: 2px; height: 2px; top: 55%; left: 80%; animation-delay: 2s; opacity: 0.3; }
.ap3 { width: 3px; height: 3px; top: 25%; left: 65%; animation-delay: 4s; opacity: 0.2; }
.ap4 { width: 2px; height: 2px; top: 70%; left: 20%; animation-delay: 1s; opacity: 0.28; }
.ap5 { width: 5px; height: 5px; top: 40%; left: 45%; animation-delay: 3s; opacity: 0.12; }
.ap6 { width: 3px; height: 3px; top: 10%; left: 35%; animation-delay: 5s; opacity: 0.22; }

.about-hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}
.about-hero-inner {
    max-width: 540px;
}
.about-hero-eyebrow {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 28px;
}
.about-hero-eyebrow .eyebrow-line {
    width: 40px;
    height: 1px;
    background: var(--border);
}
.about-hero-eyebrow .eyebrow-text {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}
.about-hero-title {
    font-size: clamp(36px, 4.5vw, 52px);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}
.about-hero-title .title-line.accent {
    display: block;
    font-size: 0.7em;
    color: var(--accent);
    font-weight: 600;
    opacity: 0.9;
    margin-top: 8px;
}
.about-hero-desc {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 500px;
}
.about-hero-stats {
    display: flex;
    align-items: center;
    gap: 0;
    padding: 24px 0;
    border-top: 1px solid var(--border);
}
.about-hero-stats .stat-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.about-hero-stats .stat-number {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    line-height: 1;
    transition: color 0.3s var(--ease-out);
}
.about-hero-stats .stat-item:hover .stat-number {
    color: var(--accent);
}
.about-hero-stats .stat-plus {
    color: var(--accent);
    font-size: 20px;
}
.about-hero-stats .stat-label {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.about-hero-stats .stat-divider {
    width: 1px;
    height: 36px;
    background: var(--border);
    margin: 0 40px;
}

.about-hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}
.about-hero-frame {
    position: relative;
    width: 100%;
    max-width: 480px;
}
.about-hero-frame-inner {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
    position: relative;
    z-index: 1;
}
.about-hero-frame-inner .frame-browser {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}
.about-hero-frame-inner .frame-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}
.about-hero-frame-inner .frame-dot:nth-child(1) { background: #f87171; }
.about-hero-frame-inner .frame-dot:nth-child(2) { background: #fbbf24; }
.about-hero-frame-inner .frame-dot:nth-child(3) { background: #4ade80; }
.about-frame-content {
    padding: 24px 20px;
}
.about-frame-blocks {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}
.about-frame-block {
    background: linear-gradient(135deg, rgba(240,160,80,0.12), rgba(240,160,80,0.04));
    border-radius: var(--radius-sm);
    border: 1px solid rgba(240,160,80,0.08);
}
.about-frame-block-lg { height: 100px; grid-column: span 2; }
.about-frame-block-md { height: 64px; }
.about-frame-block-sm { height: 64px; }
.about-hero-frame .frame-glow {
    position: absolute;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(240,160,80,0.12), transparent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    pointer-events: none;
    animation: glowPulse 4s infinite ease-in-out;
}

/* ---------- 公司信息步骤 ---------- */
.about-info-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    position: relative;
    margin-top: 48px;
}
.about-info-steps-row2 {
    margin-top: 64px;
}
.about-info-steps::before {
    content: '';
    position: absolute;
    top: 36px;
    left: 60px;
    right: 60px;
    height: 1px;
    background: var(--border);
    z-index: 0;
}
.about-info-step {
    text-align: center;
    position: relative;
    z-index: 1;
    padding: 0 16px;
}
.about-info-step-num {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    color: var(--accent);
    margin: 0 auto 24px;
    transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}
.about-info-step:hover .about-info-step-num {
    border-color: var(--accent);
    box-shadow: 0 8px 24px var(--accent-glow);
    transform: translateY(-4px);
}
.about-info-step-line {
    width: 40px;
    height: 2px;
    background: var(--accent);
    opacity: 0.3;
    margin: 0 auto 24px;
    border-radius: 1px;
}
.about-info-step h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
}
.about-info-step p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.5;
    word-break: break-all;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .about-hero .container {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    .about-hero-inner {
        max-width: none;
        order: 2;
    }
    .about-hero-visual {
        order: 1;
    }
    .about-hero-eyebrow {
        justify-content: center;
    }
    .about-hero-stats {
        justify-content: center;
    }
    .about-hero-frame {
        max-width: 360px;
    }
    .about-info-steps {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
    .about-info-steps::before {
        display: none;
    }
}

@media (max-width: 768px) {
    .about-hero {
        min-height: auto;
        padding: 120px 0 60px;
    }
    .about-hero-title {
        font-size: 32px;
    }
    .about-hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    .about-hero-stats .stat-divider {
        width: 36px;
        height: 1px;
        margin: 0;
    }
    .about-info-steps {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}