/********************************************专家*********************************************/
/* ======================================== Expert Hero Section ======================================== */
.expert-hero { align-items: center; background: linear-gradient(135deg, #1A1A2E 0%, #16213E 50%, #0F3460 100%); display: flex; min-height: 70vh; overflow: hidden; padding-top: 100px; position: relative; }
.expert-hero-bg { inset: 0; opacity: 0.4; position: absolute; z-index: 0; }
.expert-hero-bg::before { background-image: radial-gradient(circle at 1px 1px, rgba(54, 105, 239, 0.3) 1px, transparent 0); background-size: 40px 40px; content: ""; inset: 0; position: absolute; }
.expert-hero-content { align-items: center; display: grid; gap: 60px; grid-template-columns: 300px 1fr; margin: 0 auto; max-width: 1280px; padding: 60px 24px; position: relative; width: 100%; z-index: 2; }
.expert-image-wrapper { position: relative; }
.expert-image { aspect-ratio: 3/4; border: 4px solid rgba(255, 255, 255, 0.1); border-radius: 24px; box-shadow: var(--shadow-xl); overflow: hidden; width: 100%; }
.expert-image img { height: 100%; object-fit: cover; width: 100%; }
.expert-badge { background: var(--brand-blue); border-radius: 30px; bottom: -16px; box-shadow: var(--shadow-lg); color: white; font-size: 14px; font-weight: 600; left: 50%; padding: 12px 24px; position: absolute; transform: translateX(-50%); white-space: nowrap; }
.expert-info h1 { color: var(--brand-white); font-size: clamp(36px, 5vw, 56px); font-weight: 700; line-height: 1.2; margin-bottom: 8px; }
.expert-title-main { color: var(--brand-blue-light); font-size: 20px; font-weight: 500; margin-bottom: 24px; }
.expert-tags { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 32px; }
.expert-tag { backdrop-filter: blur(8px); background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.2); border-radius: 20px; color: rgba(255, 255, 255, 0.9); font-size: 14px; padding: 8px 16px; transition: all var(--transition-normal); }
.expert-tag:hover { background: rgba(54, 105, 239, 0.3); border-color: var(--brand-blue); transform: translateY(-2px); }
.expert-intro-text { color: rgba(255, 255, 255, 0.8); font-size: 16px; line-height: 1.8; max-width: 600px; }
/* ======================================== Section Common Styles ======================================== */
.section-badge { align-items: center; background: rgba(54, 105, 239, 0.1); border-radius: 20px; color: var(--brand-blue); display: inline-flex; font-size: 13px; font-weight: 500; gap: 8px; margin-bottom: 20px; padding: 8px 16px; }
.section-title { color: var(--brand-black); font-size: clamp(28px, 4vw, 42px); font-weight: 700; margin-bottom: 8px; }
.section-subtitle { color: var(--brand-blue); font-size: 16px; font-weight: 500; }
/* ======================================== Education Section ======================================== */
.education-section { background: var(--brand-white); overflow: hidden; padding: 100px 0; position: relative; }
.education-section::before { background: linear-gradient(to left, rgba(248, 248, 248, 0.8), transparent); content: ""; height: 100%; position: absolute; right: 0; top: 0; width: 50%; }
.education-grid { display: grid; gap: 24px; grid-template-columns: repeat(3, 1fr); position: relative; z-index: 1; }
.education-card { background: var(--brand-white); border: 1px solid var(--brand-gray3); border-radius: 20px; box-shadow: var(--shadow-md); overflow: hidden; padding: 32px; position: relative; transition: all var(--transition-slow); }
.education-card::before { background: linear-gradient(to bottom, var(--brand-blue), var(--brand-blue-light)); content: ""; height: 100%; left: 0; opacity: 0; position: absolute; top: 0; transition: opacity var(--transition-normal); width: 4px; }
.education-card:hover { border-color: transparent; box-shadow: var(--shadow-xl); transform: translateY(-8px); }
.education-card:hover::before { opacity: 1; }
.education-period { align-items: center; color: var(--brand-blue); display: flex; font-size: 14px; font-weight: 600; gap: 8px; margin-bottom: 12px; }
.education-degree { color: var(--brand-black); font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.education-school { color: var(--brand-gray1); font-size: 15px; }
/* ======================================== Experience Section ======================================== */
.experience-section { background: var(--brand-gray2); overflow: hidden; padding: 100px 0; position: relative; }
.experience-bg { background-image: radial-gradient(circle at 1px 1px, var(--brand-blue) 1px, transparent 0); background-size: 40px 40px; inset: 0; opacity: 0.3; position: absolute; }
.timeline { margin: 0 auto; max-width: 900px; position: relative; }
.timeline::before { background: linear-gradient(to bottom, var(--brand-blue), var(--brand-blue-light)); content: ""; height: 100%; left: 50%; opacity: 0.3; position: absolute; transform: translateX(-50%); width: 2px; }
.timeline-item { align-items: center; display: grid; gap: 60px; grid-template-columns: 1fr 1fr; margin-bottom: 48px; position: relative; }
.timeline-item:nth-child(even) .timeline-content { grid-column: 2; }
.timeline-item:nth-child(even) .timeline-date { grid-column: 1; text-align: right; }
.timeline-dot { background: var(--brand-blue); border: 4px solid var(--brand-white); border-radius: 50%; box-shadow: var(--shadow-md); height: 20px; left: 50%; position: absolute; transform: translateX(-50%); width: 20px; z-index: 2; }
.timeline-content { background: var(--brand-white); border-radius: 20px; box-shadow: var(--shadow-md); padding: 32px; transition: all var(--transition-slow); }
.timeline-content:hover { box-shadow: var(--shadow-xl); transform: translateY(-4px); }
.timeline-date { color: var(--brand-blue); font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.timeline-position { color: var(--brand-black); font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.timeline-org { color: var(--brand-gray1); font-size: 16px; font-weight: 500; margin-bottom: 16px; }
.timeline-desc { color: var(--brand-gray1); font-size: 15px; line-height: 1.7; }
/* ======================================== Research Areas Section ======================================== */
.research-section { background: var(--brand-white); padding: 100px 0; }
.research-grid { display: grid; gap: 24px; grid-template-columns: repeat(2, 1fr); }
.research-card { background: var(--brand-white); border: 1px solid var(--brand-gray3); border-radius: 20px; box-shadow: var(--shadow-md); overflow: hidden; padding: 40px; position: relative; transition: all var(--transition-slow); }
.research-card::after { background: linear-gradient(135deg, rgba(54, 105, 239, 0.1), transparent); border-radius: 0 0 0 100%; content: ""; height: 100px; opacity: 0; position: absolute; right: 0; top: 0; transition: opacity var(--transition-normal); width: 100px; }
.research-card:hover { border-color: transparent; box-shadow: var(--shadow-xl); transform: translateY(-8px); }
.research-card:hover::after { opacity: 1; }
.research-icon { align-items: center; background: linear-gradient(135deg, var(--brand-blue), var(--brand-blue-light)); border-radius: 16px; color: var(--brand-white); display: flex; height: 64px; justify-content: center; margin-bottom: 24px; transition: transform var(--transition-slow); width: 64px; }
.research-card:hover .research-icon { transform: scale(1.1) rotate(5deg); }
.research-card h3 { color: var(--brand-black); font-size: 22px; font-weight: 700; margin-bottom: 16px; }
.research-card p { color: var(--brand-gray1); font-size: 15px; line-height: 1.8; }
/* ======================================== Publications Section ======================================== */
.publications-section { background: var(--brand-gray2); overflow: hidden; padding: 100px 0; position: relative; }
.publications-bg { background: linear-gradient(135deg, rgba(54, 105, 239, 0.05), transparent, rgba(139, 92, 246, 0.05)); inset: 0; position: absolute; }
.publications-grid { display: grid; gap: 24px; grid-template-columns: repeat(2, 1fr); position: relative; z-index: 1; }
.publication-card { background: var(--brand-white); border-radius: 20px; box-shadow: var(--shadow-md); display: flex; flex-direction: column; height: 100%; padding: 32px; transition: all var(--transition-slow); }
.publication-card:hover { box-shadow: var(--shadow-xl); transform: translateY(-4px); }
.publication-year { align-self: flex-start; background: rgba(54, 105, 239, 0.1); border-radius: 20px; color: var(--brand-blue); display: inline-block; font-size: 13px; font-weight: 600; margin-bottom: 16px; padding: 6px 14px; }
.publication-title { color: var(--brand-black); font-size: 18px; font-weight: 700; line-height: 1.4; margin-bottom: 12px; }
.publication-authors { color: var(--brand-gray1); font-size: 14px; margin-bottom: 8px; }
.publication-journal { color: var(--brand-blue); font-size: 14px; font-weight: 500; }
/* ======================================== Affiliations Section ======================================== */
.affiliations-section { background: var(--brand-white); padding: 100px 0; }
.affiliations-list { display: grid; gap: 20px; grid-template-columns: repeat(3, 1fr); }
.affiliation-item { align-items: center; background: var(--brand-gray2); border: 1px solid transparent; border-radius: 16px; display: flex; gap: 16px; padding: 24px; transition: all var(--transition-normal); }
.affiliation-item:hover { background: var(--brand-white); border-color: var(--brand-blue); box-shadow: var(--shadow-md); transform: translateY(-4px); }
.affiliation-icon { align-items: center; background: linear-gradient(135deg, var(--brand-blue), var(--brand-blue-light)); border-radius: 12px; color: white; display: flex; flex-shrink: 0; height: 48px; justify-content: center; width: 48px; }
.affiliation-content h4 { color: var(--brand-black); font-size: 16px; font-weight: 600; margin-bottom: 4px; }
.affiliation-role { color: var(--brand-gray1); font-size: 14px; }
/* ======================================== 专家 Responsive Design ======================================== */
@media (max-width: 1024px) {
    .nav-links, .nav-cta { display: none; }
    .mobile-menu-btn { display: flex; }
    .expert-hero-content { gap: 40px; grid-template-columns: 1fr; text-align: center; }
    .expert-image-wrapper { margin: 0 auto; max-width: 280px; }
    .expert-tags { justify-content: center; }
    .expert-intro-text { margin: 0 auto; }
    .education-grid { grid-template-columns: repeat(2, 1fr); }
    .timeline::before { left: 20px; }
    .timeline-item { grid-template-columns: 1fr; padding-left: 60px; }
    .timeline-item:nth-child(even) .timeline-content, .timeline-item:nth-child(even) .timeline-date { grid-column: 1; text-align: left; }
    .timeline-dot { left: 20px; transform: translateX(-50%); }
    .research-grid, .publications-grid { grid-template-columns: 1fr; }
    .affiliations-list { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .education-grid { grid-template-columns: 1fr; }
    .affiliations-list { grid-template-columns: 1fr; }
    .timeline-content { padding: 24px; }
    .footer-bottom-content { flex-direction: column; gap: 8px; text-align: center; }
}