/**
 * 关于我们专属现代高阶学术风格样式表 (专业去AI版)
 * 纯粹、典雅、去同质化，符合顶尖高校学术期刊与国家级智库调性
 */

:root {
    --about-blue-900: #0f2744;
    --about-blue-800: #1e3a8a;
    --about-blue-700: #1d4ed8;
    --about-blue-600: #2563eb;
    --about-blue-50: #eff6ff;
    --about-slate-900: #0f172a;
    --about-slate-800: #1e293b;
    --about-slate-700: #334155;
    --about-slate-600: #475569;
    --about-slate-500: #64748b;
    --about-slate-200: #e2e8f0;
    --about-slate-100: #f1f5f9;
    --about-slate-50: #f8fafc;
    --about-border: #e2e8f0;
    --about-card-shadow: 0 4px 16px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -1px rgba(15, 23, 42, 0.03);
    --about-card-shadow-hover: 0 16px 32px -6px rgba(15, 23, 42, 0.1), 0 8px 16px -4px rgba(15, 23, 42, 0.04);
}

.about-page-wrap {
    background-color: #fcfdfe;
    color: var(--about-slate-900);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

.about-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

@media (max-width: 640px) {
    .about-container {
        padding: 0 16px;
    }
}

/* ==================== 1. Hero 顶区 (严谨学术质感) ==================== */
.about-hero {
    position: relative;
    padding: 56px 0 64px;
    background: linear-gradient(180deg, #f0f6ff 0%, #f7faff 65%, #fcfdfe 100%);
    border-bottom: 1px solid #e5edff;
}

.about-hero-grid {
    display: grid;
    grid-template-columns: 1.25fr 0.75fr;
    gap: 48px;
    align-items: center;
}

@media (max-width: 992px) {
    .about-hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

.about-hero-sup {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--about-blue-700);
    margin-bottom: 16px;
}

.about-hero-sup::before {
    content: "";
    display: inline-block;
    width: 18px;
    height: 2px;
    background-color: var(--about-blue-700);
}

.about-hero-title {
    font-size: 38px;
    font-weight: 800;
    color: var(--about-blue-900);
    line-height: 1.25;
    margin: 0 0 18px 0;
    letter-spacing: -0.5px;
}

@media (max-width: 640px) {
    .about-hero-title {
        font-size: 28px;
    }
}

.about-hero-title span {
    color: var(--about-blue-700);
}

.about-hero-desc {
    font-size: 16px;
    color: var(--about-slate-600);
    line-height: 1.8;
    margin: 0 0 28px 0;
    max-width: 640px;
}

.about-hero-standards {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin-bottom: 32px;
    padding-top: 16px;
    border-top: 1px solid rgba(226, 232, 240, 0.8);
}

.about-hero-std-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--about-slate-700);
}

.about-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.about-btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    background: #1e40af;
    color: #ffffff !important;
    font-size: 14px;
    font-weight: 600;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(30, 64, 175, 0.25);
    transition: all 0.2s ease;
    text-decoration: none;
    border: 1px solid #1e40af;
    cursor: pointer;
}

.about-btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(30, 64, 175, 0.35);
}

.about-btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    background: #ffffff;
    color: var(--about-slate-800) !important;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    transition: all 0.2s ease;
    text-decoration: none;
}

.about-btn-secondary:hover {
    background: #f8fafc;
    border-color: #94a3b8;
}

/* Hero 右侧规范流程架构图 */
.about-hero-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 28px;
    border: 1px solid #dbeafe;
    box-shadow: 0 10px 30px -5px rgba(30, 64, 175, 0.08);
}

.about-hero-card-header {
    font-size: 15px;
    font-weight: 700;
    color: var(--about-blue-900);
    padding-bottom: 14px;
    border-bottom: 1px solid #f1f5f9;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.about-flow-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.about-flow-step {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px;
    border-radius: 10px;
    background: #f8fafc;
    border: 1px solid #edf2f7;
    transition: all 0.2s ease;
}

.about-flow-step:hover {
    background: #eff6ff;
    border-color: #bfdbfe;
}

.about-flow-num {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    background: #1e40af;
    color: #ffffff;
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 1px;
}

.about-flow-info-title {
    font-size: 13px;
    font-weight: 700;
    color: #0f172a;
}

.about-flow-info-desc {
    font-size: 12px;
    color: #64748b;
    margin-top: 2px;
    line-height: 1.5;
}

/* ==================== 2. 权威公信力看板 (Metrics) ==================== */
.about-stats-wrap {
    margin-top: -28px;
    margin-bottom: 56px;
    position: relative;
    z-index: 5;
}

.about-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    background: #ffffff;
    border-radius: 14px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
    overflow: hidden;
}

@media (max-width: 860px) {
    .about-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.about-stat-col {
    padding: 24px;
    border-right: 1px solid #f1f5f9;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.about-stat-col:last-child {
    border-right: none;
}

@media (max-width: 860px) {
    .about-stat-col:nth-child(2) {
        border-right: none;
    }
    .about-stat-col:nth-child(1),
    .about-stat-col:nth-child(2) {
        border-bottom: 1px solid #f1f5f9;
    }
}

.about-stat-num {
    font-size: 32px;
    font-weight: 800;
    color: var(--about-blue-900);
    letter-spacing: -0.5px;
    line-height: 1;
}

.about-stat-title {
    font-size: 14px;
    font-weight: 700;
    color: #334155;
    margin-top: 8px;
}

.about-stat-sub {
    font-size: 12px;
    color: #64748b;
    margin-top: 4px;
}

/* ==================== 模块标题通则 ==================== */
.about-section {
    padding: 64px 0;
}

.about-sec-head {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 44px auto;
}

.about-sec-title {
    font-size: 28px;
    font-weight: 800;
    color: var(--about-blue-900);
    letter-spacing: -0.3px;
    margin: 0 0 10px 0;
}

.about-sec-sub {
    font-size: 15px;
    color: var(--about-slate-600);
    margin: 0;
    line-height: 1.7;
}

/* ==================== 3. 理念与宗旨 (Our Philosophy) ==================== */
.about-phi-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

@media (max-width: 992px) {
    .about-phi-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .about-phi-grid {
        grid-template-columns: 1fr;
    }
}

.about-phi-card {
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    padding: 26px;
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
    transition: all 0.25s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.about-phi-card:hover {
    transform: translateY(-3px);
    border-color: #93c5fd;
    box-shadow: var(--about-card-shadow-hover);
}

.about-phi-header {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-bottom: 12px;
}

.about-phi-badge {
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    background: #eff6ff;
    color: #1e40af;
    border-radius: 4px;
    border: 1px solid #dbeafe;
}

.about-phi-name {
    font-size: 18px;
    font-weight: 700;
    color: #0f172a;
    margin: 0;
}

.about-phi-body {
    font-size: 14px;
    color: #475569;
    line-height: 1.75;
    margin: 0;
}

.about-phi-footer {
    margin-top: 18px;
    padding-top: 12px;
    border-top: 1px solid #f1f5f9;
    font-size: 12px;
    font-weight: 600;
    color: #1e40af;
}

/* ==================== 4. 核心优势 (Our Strengths) ==================== */
.about-strengths-bg {
    background: #f8fafc;
    border-top: 1px solid #e2e8f0;
    border-bottom: 1px solid #e2e8f0;
}

.about-str-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 18px;
}

@media (max-width: 1024px) {
    .about-str-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .about-str-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.about-str-card {
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    padding: 22px 18px;
    transition: all 0.25s ease;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.about-str-card:hover {
    transform: translateY(-4px);
    border-color: #93c5fd;
    box-shadow: 0 12px 24px -6px rgba(15, 23, 42, 0.08);
}

.about-str-index {
    font-size: 13px;
    font-weight: 800;
    color: #2563eb;
    margin-bottom: 8px;
}

.about-str-title {
    font-size: 16px;
    font-weight: 700;
    color: #0f172a;
    margin: 0 0 8px 0;
}

.about-str-desc {
    font-size: 13px;
    color: #64748b;
    line-height: 1.65;
    margin: 0;
}

/* ==================== 5. 团队风采与专家阵容 (重点重塑) ==================== */
/* 精致高阶分段器 (彻底解决蓝色纯色块遮挡文字的问题) */
.about-tab-container {
    display: flex;
    justify-content: center;
    margin-bottom: 36px;
}

.about-tab-nav {
    display: inline-flex;
    background: #e2e8f0;
    padding: 4px;
    border-radius: 10px;
    gap: 4px;
}

.about-tab-btn {
    padding: 8px 24px;
    border-radius: 7px;
    font-size: 14px;
    font-weight: 600;
    color: #475569 !important;
    background: transparent !important;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    outline: none;
}

.about-tab-btn:hover {
    color: #0f172a !important;
}

/* 激活状态：纯白微浮雕底色 + 深蓝学术字，高贵耐看，绝不遮挡字 */
.about-tab-btn.active {
    background: #ffffff !important;
    color: #1e40af !important;
    box-shadow: 0 2px 6px rgba(15, 23, 42, 0.1) !important;
}

/* 专家肖像大卡片网格 (告别小圆圈灰底，呈现大半身肖像) */
.about-experts-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

@media (max-width: 1100px) {
    .about-experts-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .about-experts-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.about-expert-card {
    background: #ffffff;
    border-radius: 14px;
    border: 1px solid #e2e8f0;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.04);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    flex-direction: column;
}

.about-expert-card:hover {
    transform: translateY(-5px);
    border-color: #93c5fd;
    box-shadow: 0 16px 32px -8px rgba(30, 64, 175, 0.12);
}

/* 肖像区：大半身肖像平铺在上部，自然过渡无缝隙 */
.about-expert-photo-box {
    position: relative;
    width: 100%;
    height: 230px;
    background: #f0f1f4;
    overflow: hidden;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

.about-expert-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    display: block;
    transition: transform 0.3s ease;
}

.about-expert-card:hover .about-expert-img {
    transform: scale(1.02);
}

.about-expert-content {
    padding: 18px 16px 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    text-align: center;
}

.about-expert-name {
    font-size: 18px;
    font-weight: 800;
    color: #0f172a;
    margin: 0 0 4px 0;
}

.about-expert-title {
    font-size: 12px;
    font-weight: 600;
    color: #1d4ed8;
    margin: 0 0 12px 0;
}

.about-expert-desc {
    font-size: 12px;
    color: #475569;
    line-height: 1.65;
    margin: 0 0 16px 0;
    text-align: left;
    height: 4.95em;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.about-expert-action {
    display: inline-block;
    padding: 6px 18px;
    border-radius: 9999px;
    border: 1px solid #bfdbfe;
    background: #f8faff;
    color: #1d4ed8;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.about-expert-card:hover .about-expert-action {
    background: #1d4ed8;
    color: #ffffff;
    border-color: #1d4ed8;
}

/* ==================== 6. 合作与信赖 ==================== */
.about-collab-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-bottom: 36px;
}

@media (max-width: 992px) {
    .about-collab-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .about-collab-grid {
        grid-template-columns: 1fr;
    }
}

.about-collab-card {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    padding: 18px;
    transition: all 0.2s ease;
}

.about-collab-card:hover {
    border-color: #93c5fd;
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.05);
}

.about-collab-title {
    font-size: 15px;
    font-weight: 700;
    color: #0f172a;
    margin: 0 0 4px 0;
}

.about-collab-desc {
    font-size: 13px;
    color: #64748b;
    margin: 0;
    line-height: 1.6;
}

/* 院长评价框 (去浮夸，增加学术厚重感) */
.about-dean-quote {
    background: #f8fafc;
    border: 1px solid #cbd5e1;
    border-left: 4px solid #1e40af;
    border-radius: 8px;
    padding: 32px 36px;
    position: relative;
}

.about-dean-text {
    font-size: 16px;
    line-height: 1.8;
    color: #1e293b;
    margin: 0 0 16px 0;
    font-style: normal;
}

.about-dean-sign {
    font-size: 13px;
    font-weight: 700;
    color: #475569;
    text-align: right;
}

/* ==================== 7. FAQ 手风琴 ==================== */
.about-faq-list {
    max-width: 820px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.about-faq-item {
    background: #ffffff;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
    overflow: hidden;
    transition: all 0.2s ease;
}

.about-faq-btn {
    width: 100%;
    padding: 16px 20px;
    background: transparent;
    border: none;
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 700;
    color: #0f172a;
}

.about-faq-btn:hover {
    color: #1e40af;
}

.about-faq-chevron {
    color: #94a3b8;
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.about-faq-chevron.rotate {
    transform: rotate(180deg);
    color: #1e40af;
}

.about-faq-body {
    padding: 0 20px 18px 20px;
    font-size: 14px;
    color: #475569;
    line-height: 1.75;
    border-top: 1px solid #f8fafc;
    display: none;
}

.about-faq-body.show {
    display: block;
}

/* ==================== 8. 联系我们 ==================== */
.about-contact-wrap {
    background: #ffffff;
    border-top: 1px solid #e2e8f0;
}

.about-contact-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 32px;
    align-items: stretch;
}

@media (max-width: 992px) {
    .about-contact-grid {
        grid-template-columns: 1fr;
    }
}

.about-contact-panel {
    background: #f8fafc;
    border-radius: 14px;
    border: 1px solid #e2e8f0;
    padding: 32px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.about-contact-item-group {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 20px;
}

@media (max-width: 640px) {
    .about-contact-item-group {
        grid-template-columns: 1fr;
    }
}

.about-contact-box {
    background: #ffffff;
    padding: 18px;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
}

.about-contact-k {
    font-size: 11px;
    font-weight: 700;
    color: #64748b;
    text-transform: uppercase;
}

.about-contact-v {
    font-size: 14px;
    font-weight: 600;
    color: #0f172a;
    margin-top: 4px;
    display: block;
    word-break: break-all;
    text-decoration: none;
}

.about-contact-v:hover {
    color: #1e40af;
}

.about-consult-panel {
    background: #0f2744;
    border-radius: 14px;
    padding: 32px;
    color: #ffffff;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.about-consult-title {
    font-size: 20px;
    font-weight: 700;
    color: #ffffff;
    margin: 0 0 10px 0;
}

.about-consult-desc {
    font-size: 13px;
    color: #94a3b8;
    line-height: 1.7;
    margin: 0 0 24px 0;
}

.about-consult-points {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 28px;
}

.about-consult-point {
    font-size: 13px;
    color: #cbd5e1;
    display: flex;
    align-items: center;
    gap: 8px;
}

.about-consult-point::before {
    content: "✓";
    color: #38bdf8;
    font-weight: 700;
}

/* 专家履历模态框 */
.about-modal {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.about-modal.active {
    display: flex;
}

.about-modal-box {
    background: #ffffff;
    border-radius: 16px;
    max-width: 520px;
    width: 100%;
    padding: 28px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    position: relative;
    animation: aboutModalFadeIn 0.2s ease;
}

@keyframes aboutModalFadeIn {
    from { opacity: 0; transform: scale(0.96); }
    to { opacity: 1; transform: scale(1); }
}

.about-modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: transparent;
    border: none;
    font-size: 20px;
    color: #94a3b8;
    cursor: pointer;
    line-height: 1;
}

.about-modal-close:hover {
    color: #0f172a;
}