/* ============================================
   关于我们 - 页面样式
   link9i © 2026
   ============================================ */

/* ==================== 通用 ==================== */
.section {
    padding: 80px 0;
}

.section-alt {
    background: #F8FAFC;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    color: #0F172A;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: clamp(15px, 2vw, 18px);
    color: #64748B;
    line-height: 1.6;
    max-width: 640px;
    margin: 0 auto;
}

/* ==================== 滚动揭示动画 ==================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== Hero 区域 ==================== */
.about-hero {
    position: relative;
    padding: 160px 0 100px;
    text-align: center;
    overflow: hidden;
    background: linear-gradient(135deg, #FFF7ED 0%, #FFFFFF 50%, #F0F9FF 100%);
}

.about-hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

.hero-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.12;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: #F97316;
    top: -120px;
    right: -100px;
    animation: floatShape 8s ease-in-out infinite;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: #3B82F6;
    bottom: -80px;
    left: -80px;
    animation: floatShape 10s ease-in-out infinite reverse;
}

.shape-3 {
    width: 200px;
    height: 200px;
    background: #8B5CF6;
    top: 40%;
    left: 50%;
    animation: floatShape 12s ease-in-out infinite;
}

@keyframes floatShape {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -20px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

.about-hero-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
    margin: 0 auto;
}

.about-hero-title {
    font-size: clamp(36px, 6vw, 56px);
    font-weight: 800;
    color: #0F172A;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.about-hero-subtitle {
    font-size: clamp(18px, 3vw, 24px);
    color: #64748B;
    font-weight: 600;
    margin-bottom: 16px;
    line-height: 1.5;
}

.about-hero-subtitle strong {
    color: #F97316;
}

.about-hero-desc {
    font-size: clamp(18px, 3vw, 24px);
    color: #64748B;
    line-height: 1.7;
    max-width: 560px;
    margin: 0 auto;
}

.about-hero-desc strong {
    color: #F97316;
}

/* ==================== 关于 link9i 详细介绍 ==================== */
.about-intro {
    padding: 80px 0;
}

.intro-content {
    max-width: 860px;
    margin: 0 auto;
}

.intro-text {
    font-size: 16px;
    color: #475569;
    line-height: 1.9;
    margin-bottom: 20px;
    text-align: justify;
}

.intro-text:last-child {
    margin-bottom: 0;
}

.intro-text strong {
    color: #0F172A;
    font-weight: 600;
}

/* ==================== 平台优势 ==================== */
.advantages {
    padding: 80px 0;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
}

.advantage-card {
    display: flex;
    gap: 20px;
    padding: 32px 28px;
    background: #FFFFFF;
    border-radius: 16px;
    border: 1px solid rgba(148, 163, 184, 0.12);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #F97316, #FB923C);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.advantage-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(148, 163, 184, 0.15);
    border-color: rgba(249, 115, 22, 0.2);
}

.advantage-card:hover::before {
    transform: scaleX(1);
}

.advantage-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.1), rgba(249, 115, 22, 0.05));
    color: #F97316;
    font-size: 24px;
    transition: transform 0.3s ease;
}

.advantage-card:hover .advantage-icon {
    transform: scale(1.1) rotate(-5deg);
}

.advantage-content {
    flex: 1;
    min-width: 0;
}

.advantage-title {
    font-size: 18px;
    font-weight: 700;
    color: #0F172A;
    margin-bottom: 10px;
    line-height: 1.4;
}

.advantage-desc {
    font-size: 15px;
    color: #64748B;
    line-height: 1.7;
}

.advantage-desc strong {
    color: #0F172A;
    font-weight: 600;
}

/* ==================== 数据统计 ==================== */
.stats {
    padding: 80px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    max-width: 960px;
    margin: 0 auto;
}

.stat-item {
    text-align: center;
    padding: 32px 16px;
    position: relative;
}

.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 20%;
    height: 60%;
    width: 1px;
    background: rgba(148, 163, 184, 0.2);
}

.stat-number {
    font-size: clamp(36px, 5vw, 52px);
    font-weight: 800;
    color: #F97316;
    line-height: 1.2;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.stat-unit {
    font-size: 20px;
    font-weight: 600;
}

.stat-label {
    font-size: 15px;
    color: #64748B;
    font-weight: 500;
}

/* ==================== 郑重声明 ==================== */
.disclaimer {
    padding: 80px 0;
}

.disclaimer-content {
    max-width: 800px;
    margin: 0 auto;
}

.disclaimer-intro {
    font-size: 16px;
    color: #475569;
    line-height: 1.8;
    margin-bottom: 28px;
}

.disclaimer-list-wrapper {
    background: #FFFFFF;
    border-radius: 16px;
    padding: 32px 36px;
    border: 1px solid rgba(234, 88, 12, 0.15);
    border-left: 4px solid #EF4444;
    margin-bottom: 28px;
}

.disclaimer-list {
    list-style: none;
    counter-reset: disclaimer-counter;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.disclaimer-list li {
    counter-increment: disclaimer-counter;
    position: relative;
    padding-left: 36px;
    font-size: 15px;
    color: #1E293B;
    line-height: 1.7;
    font-weight: 500;
}

.disclaimer-list li::before {
    content: counter(disclaimer-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #FEE2E2;
    color: #DC2626;
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
}

.disclaimer-footer {
    background: #FEF2F2;
    border-radius: 12px;
    padding: 20px 24px;
    border: 1px solid rgba(239, 68, 68, 0.15);
}

.disclaimer-footer p {
    font-size: 15px;
    color: #475569;
    line-height: 1.8;
    margin: 0;
}

.disclaimer-footer strong {
    color: #DC2626;
}

/* ==================== CTA 区域 ==================== */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #F97316, #FB923C);
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(28px, 4vw, 36px);
    font-weight: 800;
    color: #FFFFFF;
    margin-bottom: 12px;
}

.cta-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
    line-height: 1.6;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* CTA 区域内的按钮覆盖 */
.cta-section .btn-primary {
    background: #FFFFFF !important;
    color: #F97316 !important;
    padding: 14px 36px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    border: none;
}

.cta-section .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.18);
    background: #F8FAFC !important;
    color: #F97316 !important;
}

.cta-section .btn-outline {
    background: transparent;
    color: #FFFFFF;
    padding: 14px 36px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 12px;
    text-decoration: none;
    border: 2px solid rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
}

.cta-section .btn-outline:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: #FFFFFF;
    transform: translateY(-2px);
    color: #FFFFFF;
}

/* ==================== 响应式 ==================== */
@media (max-width: 1024px) {
    .advantages-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 56px 0;
    }

    .about-hero {
        padding: 130px 0 60px;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .about-intro,
    .advantages,
    .stats,
    .disclaimer {
        padding: 56px 0;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .advantage-card {
        padding: 24px 20px;
        gap: 16px;
    }

    .advantage-icon {
        width: 48px;
        height: 48px;
        font-size: 20px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0;
    }

    .stat-item:not(:last-child)::after {
        display: none;
    }

    .stat-item {
        padding: 24px 12px;
    }

    .stat-item:nth-child(odd)::after {
        content: '';
        position: absolute;
        right: 0;
        top: 20%;
        height: 60%;
        width: 1px;
        background: rgba(148, 163, 184, 0.2);
    }

    .stat-item:nth-child(1),
    .stat-item:nth-child(2) {
        border-bottom: 1px solid rgba(148, 163, 184, 0.12);
    }

    .disclaimer-list-wrapper {
        padding: 24px 20px;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .cta-section .btn-primary,
    .cta-section .btn-outline {
        width: 100%;
        max-width: 280px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .about-hero {
        padding: 110px 0 48px;
    }

    .advantage-card {
        flex-direction: column;
        text-align: center;
    }

    .advantage-icon {
        margin: 0 auto;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }

    .stat-number {
        font-size: 32px;
    }

    .stat-unit {
        font-size: 16px;
    }
}