/* ========================================
   about.css — 关于我们页面专用样式
   设计风格：现代 · 科技蓝 · 沉浸式
   ======================================== */

:root {
    --primary: #0f172a;
    --primary-light: #1e3a8a;
    --accent: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.25);
    --text-main: #334155;
    --text-muted: #64748b;
    --bg-body: #f8fafc;
    --bg-card: #ffffff;
    --radius-sm: 12px;
    --radius: 16px;
    --radius-lg: 24px;
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
    --shadow-xl: 0 30px 60px -15px rgba(0, 0, 0, 0.15);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- 通用 ---- */
.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
}

section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-label {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
    background: rgba(56, 189, 248, 0.08);
    padding: 6px 18px;
    border-radius: 50px;
    margin-bottom: 16px;
}

h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: #0f172a;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ========================================
   HERO 横幅
   ======================================== */
.about-hero {
    position: relative;
    height: 60vh;
    min-height: 400px;
    max-height: 520px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 0;
}

.about-hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('../img/about/hero.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transform: scale(1.1);
    animation: heroZoom 8s ease-out forwards;
}

@keyframes heroZoom {
    0% { transform: scale(1.15); }
    100% { transform: scale(1); }
}

.about-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(30, 58, 138, 0.75) 60%, rgba(56, 189, 248, 0.3) 100%);
}

.about-hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
}

.about-hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.about-hero-content p {
    font-size: 1.3rem;
    opacity: 0.9;
    font-weight: 300;
    letter-spacing: 0.05em;
    margin-bottom: 24px;
}

.hero-breadcrumb {
    font-size: 0.9rem;
    opacity: 0.8;
}

.hero-breadcrumb a {
    color: var(--accent);
    text-decoration: none;
    transition: opacity 0.3s;
}

.hero-breadcrumb a:hover {
    opacity: 1;
    text-decoration: underline;
}

.hero-breadcrumb .sep {
    margin: 0 10px;
    opacity: 0.5;
}

/* ========================================
   公司简介
   ======================================== */
.about-intro {
    background: var(--bg-body);
}

.intro-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.intro-image {
    position: relative;
}

.intro-image-main {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    position: relative;
}

.intro-image-main::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255,255,255,0.1);
    pointer-events: none;
}

.intro-image-main img {
    width: 100%;
    height: 420px;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}

.intro-image-main:hover img {
    transform: scale(1.05);
}

.intro-image-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: white;
    padding: 16px 24px;
    border-radius: var(--radius);
    box-shadow: 0 8px 30px rgba(30, 58, 138, 0.35);
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.3;
    z-index: 3;
}

.badge-year {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.badge-text {
    font-size: 0.8rem;
    opacity: 0.8;
    font-weight: 500;
}

.intro-text .section-label {
    margin-bottom: 12px;
}

.intro-text h2 {
    font-size: 2.2rem;
    margin-bottom: 8px;
}

.intro-sub {
    color: var(--accent);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 24px;
    letter-spacing: 0.03em;
}

.intro-text p {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 18px;
}

.intro-motto {
    font-weight: 600;
    color: var(--primary-light) !important;
    border-left: 3px solid var(--accent);
    padding-left: 16px;
    font-style: italic;
}

/* ========================================
   数据统计
   ======================================== */
.stats-section {
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #0f172a 100%);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

/* 装饰圆 */
.stats-section::before {
    content: '';
    position: absolute;
    top: -120px;
    right: -80px;
    width: 300px;
    height: 300px;
    background: rgba(56, 189, 248, 0.06);
    border-radius: 50%;
}

.stats-section::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -60px;
    width: 250px;
    height: 250px;
    background: rgba(255,255,255,0.03);
    border-radius: 50%;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    position: relative;
    z-index: 1;
}

.stat-item {
    text-align: center;
    color: white;
    padding: 30px 20px;
    background: rgba(255,255,255,0.06);
    border-radius: var(--radius);
    border: 1px solid rgba(255,255,255,0.08);
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.stat-item:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-5px);
    border-color: rgba(56, 189, 248, 0.3);
}

.stat-icon {
    font-size: 2rem;
    margin-bottom: 16px;
    opacity: 0.8;
}

.stat-item h3 {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 8px;
    background: linear-gradient(to bottom, #ffffff, #bae6fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-unit {
    font-size: 1.4rem;
    font-weight: 600;
}

.stat-item p {
    font-size: 1rem;
    opacity: 0.75;
    font-weight: 500;
}

/* ========================================
   集团架构
   ======================================== */
.group-section {
    background: var(--bg-card);
}

.group-timeline {
    max-width: 780px;
    margin: 0 auto;
    position: relative;
    padding-left: 40px;
}

/* 左侧竖线 */
.group-timeline::before {
    content: '';
    position: absolute;
    left: 16px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent), var(--primary-light), var(--accent));
}

.group-item {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    margin-bottom: 40px;
    position: relative;
}

.group-item:last-child {
    margin-bottom: 0;
}

.group-number {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: white;
    font-size: 0.85rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 2;
    box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.15);
}

.group-content {
    background: var(--bg-body);
    padding: 20px 24px;
    border-radius: var(--radius-sm);
    flex: 1;
    transition: var(--transition);
    border-left: 3px solid var(--accent);
}

.group-content:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(6px);
}

.group-content h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 6px;
}

.group-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ========================================
   全国服务网络
   ======================================== */
.network-section {
    background: var(--bg-body);
}

.network-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.network-info h2 {
    margin-bottom: 20px;
}

.network-info p {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 30px;
}

.city-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.city-tag {
    display: inline-block;
    padding: 8px 20px;
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.city-tag:hover {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
    transform: translateY(-2px);
}

.network-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.network-image img {
    width: 100%;
    height: 380px;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}

.network-image:hover img {
    transform: scale(1.05);
}

/* ========================================
   核心价值
   ======================================== */
.values-section {
    background: linear-gradient(135deg, #f0f9ff 0%, #f8fafc 100%);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.value-card {
    background: var(--bg-card);
    padding: 36px 28px;
    border-radius: var(--radius);
    text-align: center;
    transition: var(--transition);
    border: 1px solid #f1f5f9;
    box-shadow: var(--shadow-sm);
}

.value-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.value-icon-wrapper {
    width: 68px;
    height: 68px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #e0f2fe, #bae6fd);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    transition: var(--transition);
}

.value-card:hover .value-icon-wrapper {
    background: linear-gradient(135deg, var(--accent), #0284c7);
    transform: scale(1.1);
}

.value-card:hover .value-icon {
    filter: brightness(10);
}

.value-card h4 {
    font-size: 1.15rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 12px;
}

.value-card p {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ========================================
   应用领域
   ======================================== */
.application-section {
    background: var(--bg-card);
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
}

.app-item {
    background: var(--bg-body);
    padding: 20px 16px;
    border-radius: var(--radius-sm);
    text-align: center;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-main);
    transition: var(--transition);
    border: 1px solid transparent;
    cursor: default;
}

.app-item span {
    display: block;
    font-size: 1.8rem;
    margin-bottom: 8px;
}

.app-item:hover {
    border-color: var(--accent);
    background: white;
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    color: var(--primary-light);
}

/* ========================================
   合作伙伴
   ======================================== */
.cooperation-section {
    background: var(--bg-body);
}

.cooperation-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

.coop-card {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.coop-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.coop-card img {
    width: 100%;
    height: auto;
    display: block;
}

.cooperation-text {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.8;
}

/* ========================================
   CTA 行动号召
   ======================================== */
.cta-section {
    padding: 80px 0;
}

.cta-box {
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
    color: white;
    padding: 60px;
    border-radius: var(--radius-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-box::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -60px;
    width: 200px;
    height: 200px;
    background: rgba(56, 189, 248, 0.08);
    border-radius: 50%;
}

.cta-box h2 {
    color: white;
    font-size: 2rem;
    margin-bottom: 12px;
}

.cta-box p {
    font-size: 1.1rem;
    opacity: 0.85;
    margin-bottom: 32px;
}

.cta-btn {
    display: inline-block;
    padding: 16px 40px;
    background: white;
    color: var(--primary);
    font-weight: 700;
    font-size: 1rem;
    border-radius: 50px;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
    background: var(--accent);
    color: white;
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 992px) {
    .intro-wrapper,
    .network-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .intro-image-badge {
        right: 10px;
        bottom: -20px;
    }

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

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

@media (max-width: 768px) {
    section {
        padding: 60px 0;
    }

    .about-hero {
        height: 45vh;
        min-height: 320px;
    }

    .about-hero-content h1 {
        font-size: 2.2rem;
    }

    .about-hero-content p {
        font-size: 1rem;
    }

    h2 {
        font-size: 1.8rem;
    }

    .intro-text h2 {
        font-size: 1.7rem;
    }

    .intro-image-main img {
        height: 280px;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .stat-item h3 {
        font-size: 2rem;
    }

    .values-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .value-card {
        padding: 28px 20px;
    }

    .group-timeline {
        padding-left: 30px;
    }

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

    .cta-box {
        padding: 40px 24px;
    }

    .cta-box h2 {
        font-size: 1.5rem;
    }

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

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }

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

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

    .intro-image-badge {
        padding: 12px 18px;
    }

    .badge-year {
        font-size: 1.5rem;
    }
}