/**
 * ==================================================
 * 洁博利 · 关于我们页面样式
 * @version 2.0.4
 * @update 2026-05-23
 * @description 品牌墙紧凑排列，核心能力三列文字图片布局
 * ==================================================
 */

/* ========== 1. 全局变量与重置 ========== */
:root {
    --color-primary: #1b9b97;
    --color-primary-dark: #0f7e7a;
    --color-secondary: #5a6b7a;
    --color-dark: #1e2a2e;
    --color-soft-dark: #2c3e40;
    --color-gold: #c6a05b;
    --color-gold-light: #e9d6b0;
    --color-white: #ffffff;
    --color-bg: #fbfcfd;
    --color-card-bg: #ffffff;
    --color-border: #eef2f2;
    --shadow-sm: 0 8px 20px rgba(0, 0, 0, 0.02), 0 2px 6px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 20px 35px -12px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 24px 42px -16px rgba(0, 0, 0, 0.12);
    --transition-smooth: all 0.4s cubic-bezier(0.2, 0.9, 0.4, 1.1);
    --border-radius-card: 2rem;
    --border-radius-md: 1.5rem;
    --border-radius-sm: 1rem;
    --font-body: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--color-bg);
    font-family: var(--font-body);
    color: var(--color-dark);
    line-height: 1.5;
    scroll-behavior: smooth;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    transition: var(--transition-smooth);
}

/* ========== 2. 导航栏 ========== */
.join-nav-menu {
    background: var(--color-soft-dark) !important;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 2.5rem;
    padding: 1rem 1.5rem;
    margin: 0;
    list-style: none;
    position: relative;
    z-index: 10;
}

.join-nav-link {
    color: rgba(255, 255, 255, 0.85) !important;
    font-weight: 500;
    font-size: 1rem;
    letter-spacing: 0.5px;
    padding: 0.4rem 0;
    position: relative;
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    transition: color 0.2s ease;
}

.join-nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-gold);
    transition: width 0.25s ease-out;
}

.join-nav-link:hover::after,
.join-nav-link.active::after {
    width: 100%;
}

.join-nav-link:hover,
.join-nav-link.active {
    color: var(--color-white) !important;
}

/* ========== 3. 通用区块样式 ========== */
.about-section {
    padding: 5rem 0;
}

.bg-light {
    background-color: #ffffff;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--color-soft-dark);
    position: relative;
    display: inline-block;
    margin-bottom: 0.75rem;
}

.section-title h2:after {
    content: '';
    width: 64px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-gold));
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 4px;
}

.section-title p {
    color: var(--color-secondary);
    font-size: 1.1rem;
    margin-top: 1.2rem;
}

/* ========== 4. 头部Hero区域 ========== */
.hero-banner {
    background: linear-gradient(135deg, #ffffff 0%, #f5f8fc 100%);
    padding: 4rem 0 3rem;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    background: rgba(27, 155, 151, 0.1);
    color: var(--color-primary);
    padding: 0.3rem 1.2rem;
    border-radius: 40px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.hero-banner h1 {
    font-size: 3.2rem;
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: 1rem;
    letter-spacing: -0.5px;
}

.hero-sub {
    font-size: 1.2rem;
    color: var(--color-secondary);
    margin-bottom: 2rem;
}

.hero-video-trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-primary);
    color: white;
    padding: 0.6rem 1.5rem;
    border-radius: 60px;
    font-weight: 500;
}

.hero-video-trigger:hover {
    background: var(--color-gold);
    transform: translateY(-2px);
}

/* ========== 5. 认证网格（紧凑行高） ========== */
.cert-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.8rem;
    max-width: 900px;
    margin: 0 auto;
}

.cert-item {
    background: #fff;
    padding: 10px 8px;
    border-radius: var(--border-radius-sm);
    text-align: center;
    font-size: 0.92rem;
    line-height: 1.25;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

.cert-item:hover {
    border-color: var(--color-primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.cert-item a {
    color: inherit;
    text-decoration: none;
    display: block;
    width: 100%;
    height: 100%;
}

.cert-item a:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

/* ========== 6. 使命区 ========== */
.about-hero {
    padding: 4rem 0 2rem;
    text-align: center;
}

.about-hero h1 {
    font-size: 2.8rem;
    margin-bottom: 1rem;
    color: var(--color-soft-dark);
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--color-secondary);
    max-width: 750px;
    margin: 0 auto 2rem;
}

.hero-image img {
    border-radius: var(--border-radius-card);
    margin: 0 auto;
    box-shadow: var(--shadow-md);
}

.mission-section {
    padding: 2rem 0 4rem;
    text-align: center;
}

.mission-card {
    background: var(--color-card-bg);
    border-radius: var(--border-radius-card);
    padding: 3rem 2rem;
    box-shadow: var(--shadow-md);
}

.mission-card h2 {
    font-size: 2rem;
    margin-bottom: 0.75rem;
    color: var(--color-primary);
}

.mission-desc {
    max-width: 800px;
    margin: 1.5rem auto 0;
    color: var(--color-secondary);
}

.mission-desc p {
    margin-bottom: 1rem;
}

/* ========== 7. 数据统计区 ========== */
.stats-section {
    padding: 4rem 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.stat-item {
    background: var(--color-card-bg);
    padding: 2rem 1rem;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: #5a6b7a;
}

/* ========== 8. 企业概况 ========== */
.overview-content {
    display: flex;
    flex-wrap: wrap;
    gap: 40px;
    align-items: center;
}

.overview-text {
    flex: 1;
    min-width: 300px;
}

.overview-text p {
    margin-bottom: 1rem;
    font-size: 1rem;
    color: #2c3e40;
}

.overview-video-wrapper {
    border-radius: var(--border-radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    background: #000;
}

.overview-video-wrapper iframe {
    width: 100%;
    aspect-ratio: 16 / 9;
    border: none;
}

.overview-video-caption {
    text-align: center;
    margin-top: 12px;
}

.overview-video-caption a {
    color: var(--color-primary);
    font-weight: 500;
}

/* ========== 9. 核心能力卡片（三列布局，文字图片设计） ========== */
.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.capability-card {
    background: var(--color-card-bg);
    padding: 2rem 1.5rem;
    border-radius: var(--border-radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.capability-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

/* 核心数据数字 */
.cap-icon {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
    margin-bottom: 1rem;
}

/* 文字图片正方形 */
.core-word-img {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-gold));
    color: #fff;
    font-size: 1.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    margin-bottom: 0.8rem;
    letter-spacing: 2px;
    box-shadow: 0 8px 18px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.capability-card:hover .core-word-img {
    transform: scale(1.05);
}

/* 副标题 */
.core-subtitle {
    font-size: 0.95rem;
    color: var(--color-secondary);
    margin-bottom: 1.2rem;
    font-weight: 500;
}

/* 列表项 */
.core-list {
    list-style: none;
    padding: 0;
    margin: 0;
    width: 100%;
    text-align: left;
}

.core-list li {
    font-size: 0.9rem;
    color: #5a6b7a;
    padding: 0.3rem 0;
    padding-left: 1.2rem;
    position: relative;
}

.core-list li::before {
    content: "•";
    color: var(--color-primary);
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* ========== 10. 产品领域 ========== */
.product-areas-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.product-area-card {
    background: var(--color-card-bg);
    border-radius: var(--border-radius-card);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

.product-area-card:hover {
    box-shadow: var(--shadow-md);
}

.product-area-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--color-soft-dark);
}

.product-area-card ul {
    list-style: none;
}

.product-area-card li {
    font-size: 0.9rem;
    margin-bottom: 0.6rem;
    position: relative;
    padding-left: 1rem;
}

.product-area-card li::before {
    content: "—";
    color: var(--color-gold);
    position: absolute;
    left: 0;
}

/* ========== 11. 目标客群 + 应用场景 ========== */
.two-col-layout {
    display: flex;
    gap: 3rem;
    flex-wrap: wrap;
}

.two-col-item {
    flex: 1;
    min-width: 260px;
}

.two-col-item h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--color-soft-dark);
}

.audience-card {
    background: var(--color-card-bg);
    border-radius: var(--border-radius-md);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.audience-card h4 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--color-primary);
}

.audience-card ul,
.two-col-item ul {
    list-style: none;
}

.audience-card li,
.two-col-item li {
    font-size: 0.9rem;
    margin-bottom: 0.6rem;
    position: relative;
    padding-left: 1rem;
}

.audience-card li::before,
.two-col-item li::before {
    content: "•";
    color: var(--color-primary);
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* ========== 12. 智研精品 ========== */
.innovation-content {
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    border-radius: var(--border-radius-card);
    padding: 3rem;
}

.innovation-text p {
    margin-bottom: 1rem;
    font-size: 1rem;
    line-height: 1.6;
}

/* ========== 13. 解决方案 ========== */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.solution-card {
    background: var(--color-card-bg);
    border-radius: var(--border-radius-md);
    padding: 1.8rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

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

.solution-card h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    border-left: 3px solid var(--color-gold);
    padding-left: 0.75rem;
}

.solution-card ul {
    list-style: none;
}

.solution-card li {
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
    position: relative;
    padding-left: 0.75rem;
}

.solution-card li::before {
    content: "▹";
    color: var(--color-primary);
    position: absolute;
    left: 0;
    font-size: 0.75rem;
}

/* ========== 14. 旗下品牌 ========== */
.brand-logos-placeholder {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.brand-item {
    background: var(--color-card-bg);
    padding: 2rem 1rem;
    border-radius: var(--border-radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

.brand-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.brand-item img {
    max-height: 70px;
    margin: 0 auto 1rem;
    object-fit: contain;
}

.brand-name {
    font-weight: 600;
    color: var(--color-soft-dark);
}

.company-btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
}

.company-btn {
    padding: 0.6rem 1.5rem;
    background: var(--color-gold);
    color: #fff;
    border-radius: 60px;
    font-size: 0.85rem;
    transition: var(--transition-smooth);
    white-space: nowrap;
}

.company-btn:hover {
    background: var(--color-primary);
    transform: translateY(-2px);
}

/* ========== 15. 合作客户品牌墙（紧凑排列） ========== */
.brand-wall {
    margin-top: 1rem;
}

.brand-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 10px;
    align-items: center;
    justify-items: center;
}

.brand-icon-item {
    background: #fff;
    padding: 8px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    border: 1px solid #edf2f7;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    width: 100%;
    max-width: 140px;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.brand-icon-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0,0,0,0.08);
}

.brand-icon-item img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.brand-note {
    text-align: center;
    color: #a0aec0;
    font-size: 0.85rem;
    margin-top: 1.5rem;
}

/* ========== 16. 底部CTA ========== */
.footer-cta {
    background: linear-gradient(135deg, #1e2a2e, #142022);
    text-align: center;
    padding: 4rem 2rem;
    color: white;
    border-radius: 2rem 2rem 0 0;
    margin-top: 2rem;
}

.footer-cta h3 {
    font-size: 1.8rem;
    margin-bottom: 0.75rem;
}

.footer-cta p {
    margin-bottom: 1.5rem;
    opacity: 0.8;
}

.btn-primary {
    display: inline-block;
    background: var(--color-gold);
    color: #fff;
    padding: 0.8rem 2rem;
    border-radius: 60px;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.btn-primary:hover {
    background: var(--color-primary);
    transform: translateY(-3px);
}

/* ========== 17. 悬浮按钮 ========== */
.float-buttons {
    position: fixed;
    right: 24px;
    bottom: 80px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    z-index: 999;
}

.float-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gold);
    color: white;
    box-shadow: var(--shadow-md);
    transition: var(--transition-smooth);
}

.float-btn:hover {
    transform: scale(1.05);
    background: var(--color-primary);
}

/* ========== 18. 响应式 ========== */
@media (max-width: 1024px) {
    .capabilities-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 1rem;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .brand-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .core-word-img {
        width: 100px;
        height: 100px;
        font-size: 1.4rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    .hero-banner h1 {
        font-size: 2.2rem;
    }
    .cert-list {
        grid-template-columns: repeat(2, 1fr);
    }
    .product-areas-grid,
    .solutions-grid,
    .brand-logos-placeholder {
        grid-template-columns: 1fr;
    }
    .stats-grid,
    .capabilities-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }
    .join-nav-menu {
        gap: 1.2rem;
        padding: 0.8rem;
    }
    .join-nav-link {
        font-size: 0.85rem;
    }
    .about-hero h1 {
        font-size: 2rem;
    }
    .mission-card {
        padding: 2rem 1rem;
    }
    .innovation-content {
        padding: 1.5rem;
    }
    .brand-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .core-word-img {
        width: 100px;
        height: 100px;
        font-size: 1.4rem;
    }
}

@media (max-width: 480px) {
    .stats-grid,
    .capabilities-grid {
        grid-template-columns: 1fr;
    }
    .cert-list {
        grid-template-columns: 1fr;
    }
    .section-title h2 {
        font-size: 1.8rem;
    }
    .hero-banner h1 {
        font-size: 1.8rem;
    }
    .two-col-layout {
        gap: 1.5rem;
    }
}