/* ════════════════════════════════════════
   罗伟教授课题组网站样式表（浅色主题）
   Shenzhen University of Advanced Technology
   School of Materials — Prof. Luo Wei Group
   ════════════════════════════════════════ */

/* ═══ CSS 变量 ═══ */
:root {
    --primary: #73207c;
    --primary-dark: #5a185f;
    --primary-light: #b56ec0;
    --accent: #d4a853;
    --bg: #ffffff;
    --bg-secondary: #f9f7fb;
    --bg-tertiary: #f2eef5;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    --bg-card-dark: #1a1222;
    --bg-card-dark-hover: #271d33;
    --bg-input-dark: #120c18;
    --text-primary: #1a1222;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    --border: rgba(0, 0, 0, 0.08);
    --border-light: rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.12);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --transition: color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                 background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                 border-color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                 transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                 box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                 opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-display: "Inter", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* ═══ 基础重置 ═══ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

input, textarea, select {
    font-family: inherit;
    outline: none;
}

input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--primary-light);
    outline-offset: 2px;
}

html {
    -webkit-tap-highlight-color: transparent;
}

body {
    touch-action: manipulation;
}

::selection {
    background: var(--primary);
    color: #fff;
}

/* ═══ 滚动条 ═══ */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.15);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.25);
}

/* ═══ 通用容器 ═══ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
    position: relative;
    scroll-margin-top: 96px;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
    text-wrap: balance;
}

.section-desc {
    font-size: 17px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    text-wrap: balance;
}

.skip-link {
    position: absolute;
    top: -60px;
    left: 0;
    background: #000;
    color: #fff;
    padding: 8px 16px;
    z-index: 10000;
    transition: top 0.3s;
    text-decoration: none;
    border-radius: 0 0 8px 0;
}

.skip-link:focus {
    top: 0;
}

/* ═══ 导航栏 ═══ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 88px;
    background: var(--primary);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: var(--transition);
}

.navbar.scrolled {
    background: var(--primary);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.navbar.hidden {
    transform: translateY(-100%);
}

.nav-container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 48px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo-link {
    display: flex;
    align-items: center;
    transition: var(--transition);
}

.logo-link:hover {
    opacity: 0.85;
}

.logo-img {
    height: 45px;
    width: auto;
    padding: 4px 8px;
    object-fit: contain;
    transition: var(--transition);
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: #ffffff;
    text-decoration: none;
    transition: var(--transition);
}

.logo-text:hover {
    opacity: 0.85;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-item {
    padding: 10px 16px;
    font-size: 15px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.nav-item:hover,
.nav-item.active {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.12);
}

/* ═══ 语言切换（地球下拉样式）═══ */
.lang-dropdown {
    position: relative;
    margin-left: 8px;
}

.lang-trigger {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    width: 40px;
    height: 40px;
    color: rgba(255, 255, 255, 0.85);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.lang-trigger:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.12);
}

.lang-trigger svg {
    width: 18px;
    height: 18px;
}

.lang-trigger .caret {
    width: 12px;
    height: 12px;
    transition: transform 0.2s;
}

.lang-dropdown.open .caret {
    transform: rotate(180deg);
}

.lang-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 150px;
    background: var(--nav-background);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 8px;
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.25);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
    z-index: 1001;
}

.lang-dropdown.open .lang-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: block;
    width: 100%;
    padding: 10px 14px;
    font-size: 14px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-sm);
    text-align: left;
    transition: var(--transition);
}

.lang-option:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

.lang-option.active {
    color: #c78be0;
    font-weight: 600;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    z-index: 1002;
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: #ffffff;
    transition: var(--transition);
}

.mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ═══ Hero 区域 ═══ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding-top: 88px;
    background: linear-gradient(135deg, #b9c8ce 0%, #d2cde0 50%, #e2dde9 100%);
}

/* 朦胧亚克力质感：粒子层之上叠加柔和白色雾气 */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 30%, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0) 60%);
    z-index: 1;
    pointer-events: none;
}

.particle-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 1;
    display: block;
}

.hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 1120px;
    padding: 48px 24px;
}

.hero-split {
    display: flex;
    align-items: center;
    gap: 64px;
}

.hero-main {
    flex: 1.15;
    min-width: 0;
}

.hero-label {
    font-size: 14px;
    font-weight: 600;
    color: #666;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(32px, 4vw, 52px);
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -0.01em;
    color: #111;
    margin-bottom: 20px;
    text-wrap: balance;
}

.hero-subtitle {
    font-size: 17px;
    color: #555;
    max-width: 480px;
    margin-bottom: 28px;
    line-height: 1.6;
    text-wrap: balance;
}

.hero-positions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.position-tag {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--primary);
    background: rgba(115, 32, 124, 0.08);
    border: 1px solid rgba(115, 32, 124, 0.2);
    border-radius: 999px;
}

.position-tag-accent {
    color: #7a5c1c;
    background: rgba(212, 168, 83, 0.15);
    border-color: rgba(212, 168, 83, 0.35);
}

/* ═══ Hero 内的简介卡片（常驻，不再需要点击） ═══ */
.hero-intro-card {
    flex: 1;
    min-width: 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 36px;
    text-align: left;
}

.hero-intro-title {
    font-size: 20px;
    font-weight: 700;
    color: #111;
    margin-bottom: 14px;
}

.hero-intro-summary {
    font-size: 15px;
    color: #444;
    line-height: 1.75;
    margin-bottom: 18px;
}

.hero-intro-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    transition: var(--transition);
}

.hero-intro-link:hover {
    color: var(--primary-dark);
    gap: 8px;
}

/* ═══ 导师简介（完整版） ═══ */
.about-content {
    margin: 0;
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 64px;
    align-items: center;
}

.about-photo {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    margin-left: -16px;
}

.about-photo-img {
    width: 100%;
    aspect-ratio: 3 / 4;
    object-fit: cover;
    object-position: center top;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    display: block;
}

.about-text {
    min-width: 0;
}

.about-title {
    font-family: var(--font-display);
    font-size: clamp(30px, 4.5vw, 44px);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 8px;
    text-align: center;
    text-wrap: balance;
}

.about-subtitle {
    font-size: 15px;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 28px;
    text-align: center;
}

.about-content p {
    font-size: 16px;
    color: #444;
    line-height: 1.9;
    text-align: left;
    margin-bottom: 20px;
}

.about-content p:first-of-type {
    color: #222;
}

.about-content p:last-of-type {
    margin-bottom: 0;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .about-photo {
        justify-content: center;
        margin-left: 0;
    }
    .about-photo-img {
        max-width: 260px;
    }
}

/* ═══ 研究内容 ═══ */
.research {
    background: var(--bg);
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.research-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 36px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.research-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
    z-index: 2;
}

.research-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(115, 32, 124, 0.3);
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

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

.research-card-bg {
    padding: 0;
    min-height: 360px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.research-card-bg-fp {
    background-color: #f2eef8;
    background-image:
        radial-gradient(circle at 25% 25%, rgba(115, 32, 124, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 75% 75%, rgba(115, 32, 124, 0.08) 0%, transparent 35%),
        linear-gradient(135deg, rgba(115, 32, 124, 0.05) 0%, transparent 50%);
}

.research-card-bg-ml {
    background-color: #f0f3f8;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(115, 32, 124, 0.1) 0%, transparent 30%),
        radial-gradient(circle at 80% 20%, rgba(115, 32, 124, 0.08) 0%, transparent 35%),
        linear-gradient(45deg, rgba(115, 32, 124, 0.04) 0%, transparent 50%);
}

.research-card-bg-ai {
    background-color: #f8f0f5;
    background-image:
        radial-gradient(circle at 50% 50%, rgba(115, 32, 124, 0.1) 0%, transparent 45%),
        radial-gradient(circle at 30% 70%, rgba(115, 32, 124, 0.08) 0%, transparent 30%),
        linear-gradient(225deg, rgba(115, 32, 124, 0.05) 0%, transparent 50%);
}

.research-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.72) 0%, rgba(255, 255, 255, 0.42) 50%, rgba(115, 32, 124, 0.12) 100%);
    z-index: 1;
    transition: var(--transition);
}

.research-card:hover .research-card-overlay {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.62) 0%, rgba(255, 255, 255, 0.32) 50%, rgba(115, 32, 124, 0.18) 100%);
}

.research-card-content {
    position: relative;
    z-index: 2;
    padding: 36px;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.research-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.research-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.research-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.card-link {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    color: #ffffff;
    background: var(--primary);
    border: 1px solid var(--primary);
    border-radius: 999px;
    margin-top: auto;
    transition: var(--transition);
}

.research-card:hover .card-link {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    box-shadow: 0 8px 24px rgba(115, 32, 124, 0.25);
}

/* ═══ 团队成员 ═══ */
.team {
    background: var(--bg-secondary);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.team-member {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px;
    display: flex;
    gap: 24px;
    align-items: flex-start;
    transition: var(--transition);
}

.team-member:hover {
    background: var(--bg-card-hover);
    border-color: rgba(115, 32, 124, 0.3);
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.team-member.leader {
    grid-column: span 2;
    background: linear-gradient(135deg, rgba(115, 32, 124, 0.08) 0%, rgba(212, 168, 83, 0.05) 100%);
    border-color: rgba(115, 32, 124, 0.2);
}

.member-avatar {
    width: 80px;
    height: 80px;
    min-width: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    overflow: hidden;
}

.member-avatar-text {
    font-size: 32px;
    font-weight: 700;
    color: #ffffff;
}

.member-avatar-emoji {
    font-size: 36px;
    line-height: 1;
}

.member-avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}

.team-member.leader .member-avatar {
    width: 100px;
    height: 100px;
    min-width: 100px;
}

.team-member.leader .member-avatar-text {
    font-size: 42px;
}

.team-member.leader .member-avatar-emoji {
    font-size: 48px;
}

.member-info h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.member-role {
    font-size: 14px;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 12px;
}

.member-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ═══ 论文检索 ═══ */
.publications {
    background: var(--bg);
}

.publications-preview {
    background: var(--bg-secondary);
}

.view-all-wrapper {
    text-align: center;
    margin-top: 32px;
}

.view-all-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.view-all-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(115, 32, 124, 0.25);
}

.search-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px;
    margin-bottom: 40px;
    box-shadow: var(--shadow);
}

.search-input-wrapper {
    position: relative;
    margin-bottom: 20px;
}

.search-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    width: 22px;
    height: 22px;
    color: var(--text-tertiary);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 16px 48px 16px 52px;
    font-size: 16px;
    color: var(--text-primary);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.search-input::placeholder {
    color: var(--text-tertiary);
}

.search-input:focus {
    border-color: var(--primary-light);
    background: var(--bg-secondary);
    box-shadow: 0 0 0 4px rgba(115, 32, 124, 0.12);
}

.search-clear {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 20px;
    line-height: 1;
    display: none;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.search-clear:hover {
    background: var(--primary);
    color: #ffffff;
}

.search-clear.visible {
    display: flex;
}

.search-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.filter-btn {
    padding: 8px 18px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 999px;
    transition: var(--transition);
}

.filter-btn:hover {
    border-color: var(--primary-light);
    color: var(--primary);
}

.filter-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.search-stats {
    font-size: 14px;
    color: var(--text-tertiary);
}

.search-stats strong {
    color: var(--primary);
    font-weight: 700;
}

.publication-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.publication-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: var(--transition);
    display: flex;
    gap: 20px;
    align-items: flex-start;
    box-shadow: var(--shadow);
    cursor: pointer;
}

.publication-item:hover {
    background: var(--bg-card-hover);
    border-color: rgba(115, 32, 124, 0.3);
    transform: translateX(8px);
    box-shadow: var(--shadow-lg);
}

.publication-item.hidden {
    display: none;
}

.pub-year {
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 700;
    color: #7a5c1c;
    background: rgba(212, 168, 83, 0.15);
    border: 1px solid rgba(212, 168, 83, 0.25);
    min-width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-variant-numeric: tabular-nums;
}

.pub-content {
    flex: 1;
}

.pub-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.5;
}

.pub-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 14px;
    color: var(--text-tertiary);
    margin-bottom: 12px;
}

.pub-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.pub-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.pub-tag {
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 500;
    color: var(--primary);
    background: rgba(115, 32, 124, 0.08);
    border-radius: 999px;
}

.pub-link {
    color: var(--text-tertiary);
    transition: var(--transition);
    padding-top: 4px;
}

.pub-link:hover {
    color: var(--primary);
    transform: translateX(4px);
}

.representative-header {
    margin-top: 80px;
    margin-bottom: 48px;
}

.section-subtitle {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 700;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
    padding-bottom: 12px;
}

.section-subtitle::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
}

.load-more-wrapper {
    text-align: center;
    margin-top: 40px;
}

.load-more {
    display: inline-block;
    padding: 14px 36px;
    font-size: 15px;
    font-weight: 600;
    color: var(--primary);
    background: transparent;
    border: 1px solid var(--primary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.load-more:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.load-more.hidden {
    display: none;
}

.no-results {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-tertiary);
}

.no-results-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

/* ═══ 新闻动态 ═══ */
.news {
    background: var(--bg-secondary);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.news-item {
    display: flex;
    gap: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.news-item:hover {
    background: var(--bg-card-hover);
    border-color: rgba(115, 32, 124, 0.3);
    transform: translateX(8px);
    box-shadow: var(--shadow-lg);
}

.news-date {
    min-width: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 16px;
    background: linear-gradient(135deg, rgba(115, 32, 124, 0.12) 0%, rgba(212, 168, 83, 0.08) 100%);
    border-radius: var(--radius-sm);
}

.news-day {
    font-size: 32px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.news-month {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.news-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.news-content p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ═══ 联系我们 ═══ */
.contact {
    background: var(--bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: start;
}

.contact-info .section-title {
    text-align: left;
}

.contact-desc {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 40px;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.contact-item:hover {
    transform: translateX(6px);
    border-color: rgba(115, 32, 124, 0.3);
    box-shadow: var(--shadow-lg);
}

.contact-icon {
    font-size: 24px;
    min-width: 32px;
    color: var(--primary);
}

.contact-item h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.contact-cta {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    height: 100%;
    box-shadow: var(--shadow);
}

.contact-cta h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.contact-cta p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 28px;
}

.email-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.email-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(115, 32, 124, 0.25);
}

/* ═══ 毕业同学 ═══ */
.alumni {
    background: var(--bg-secondary);
}

.alumni-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.alumni-card {
    display: flex;
    gap: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.alumni-card:hover {
    transform: translateX(8px);
    border-color: rgba(115, 32, 124, 0.3);
    box-shadow: var(--shadow-lg);
}

.alumni-year {
    min-width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 800;
    color: var(--primary);
    background: rgba(115, 32, 124, 0.08);
    border-radius: var(--radius-sm);
}

.alumni-info h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.alumni-degree {
    font-size: 14px;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 8px;
}

.alumni-destination {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.alumni-empty,
.news-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
}

.alumni-empty-icon,
.news-empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.alumni-empty p,
.news-empty p {
    font-size: 16px;
    color: var(--text-tertiary);
}

/* ═══ Footer 三栏布局 ═══ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 56px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 40px;
}

.footer-column-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary);
    display: inline-block;
}

.footer-contact-info p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 12px;
}

.footer-contact-info strong {
    color: var(--text-primary);
    font-weight: 600;
    margin-right: 4px;
}

.footer-link-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-link-list li a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: var(--transition);
    display: inline-block;
}

.footer-link-list li a:hover {
    color: var(--primary);
    transform: translateX(4px);
}

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border-light);
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-tertiary);
}

/* ═══ 动画 ═══ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* ═══ 响应式设计 ═══ */
@media (max-width: 1024px) {
    .research-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .navbar {
        height: 64px;
    }

    .nav-links {
        position: fixed;
        top: 88px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--primary);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: 40px;
        gap: 8px;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        overscroll-behavior: contain;
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .nav-item {
        font-size: 18px;
        padding: 16px 24px;
        width: 80%;
        text-align: center;
        color: rgba(255, 255, 255, 0.9);
    }

    .nav-item:hover,
    .nav-item.active {
        color: #ffffff;
        background: rgba(255, 255, 255, 0.12);
    }

    .lang-dropdown {
        margin-left: 0;
        margin-top: 16px;
    }

    .lang-menu {
        right: auto;
        left: 50%;
        transform: translateX(-50%) translateY(-8px);
    }

    .lang-dropdown.open .lang-menu {
        transform: translateX(-50%) translateY(0);
    }

    .mobile-toggle {
        display: flex;
    }

    .hero {
        padding-top: 88px;
    }

    .hero-split {
        flex-direction: column;
        align-items: stretch;
        gap: 32px;
        text-align: center;
    }

    .hero-main {
        text-align: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-positions {
        justify-content: center;
    }

    .hero-intro-card {
        text-align: left;
    }

    .hero-title {
        font-size: clamp(26px, 6vw, 40px);
        line-height: 1.3;
    }

    .hero-subtitle {
        font-size: 15.5px;
    }

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

    .research-grid,
    .team-grid {
        grid-template-columns: 1fr;
    }

    .team-member.leader {
        grid-column: span 1;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .team-member {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .contact-info .section-title {
        text-align: center;
    }

    .contact-desc {
        text-align: center;
    }

    .news-item {
        flex-direction: column;
    }

    .news-date {
        flex-direction: row;
        gap: 8px;
        min-width: auto;
        width: fit-content;
    }

    .publication-item {
        flex-direction: column;
    }


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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: left;
    }

    .footer-column-title {
        margin-bottom: 16px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .section {
        padding: 64px 0;
    }

    .hero-content {
        padding: 32px 16px;
    }

    .hero-intro-card {
        padding: 24px;
    }

    .hero-title {
        font-size: clamp(24px, 7vw, 34px);
    }

    .hero-subtitle {
        font-size: 14.5px;
    }

    .hero-intro-title {
        font-size: 18px;
    }

    .hero-intro-summary {
        font-size: 14px;
    }

    .search-box {
        padding: 20px;
    }

    .search-filters {
        gap: 8px;
    }

    .filter-btn {
        padding: 6px 14px;
        font-size: 13px;
    }

    .contact-cta {
        padding: 28px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }

    [data-aos] {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* Consistent academic iconography and responsive layout refinements. */
.research-icon { color: var(--primary); line-height: 1; }
.research-icon svg { width: 48px; height: 48px; display: block; }
.contact-icon { color: var(--primary); display: flex; align-items: center; }
.contact-icon svg { width: 24px; height: 24px; }
.no-results-icon svg { width: 40px; height: 40px; }
.member-avatar { background: var(--bg-tertiary); flex-shrink: 0; }
.member-avatar-text { color: var(--primary); font-size: 21px; letter-spacing: .04em; }
.member-info, .pub-content, .contact-item > div { min-width: 0; overflow-wrap: anywhere; }
.pub-meta span { min-width: 0; display: inline; }
.research-card-content { flex: 1; }
.lang-trigger, .mobile-toggle { min-width: 44px; min-height: 44px; }
.mobile-toggle { justify-content: center; align-items: center; flex-shrink: 0; }
.pub-link { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; }
.publications { padding-top: 136px; }
@media (min-width: 769px) and (max-width: 1100px) {
    .nav-container { padding: 0 20px; }
    .nav-logo { gap: 8px; }
    .logo-img { max-width: 180px; height: auto; }
    .logo-text { font-size: 17px; white-space: nowrap; }
    .nav-item { padding: 10px; font-size: 14px; }
    .nav-links { gap: 0; }
    .hero-split { gap: 28px; }
}
@media (max-width: 768px) {
    .nav-container { padding: 0 16px; gap: 8px; }
    .nav-logo { gap: 8px; min-width: 0; }
    .logo-link { min-width: 0; flex-shrink: 1; }
    .logo-img { width: 148px; height: auto; max-height: 40px; padding: 0; }
    .logo-text { font-size: 16px; white-space: nowrap; flex-shrink: 0; }
    .nav-links {
        top: 64px; bottom: auto;
        height: calc(100vh - 64px); height: calc(100dvh - 64px);
        padding: 24px 16px max(32px, env(safe-area-inset-bottom));
        overflow-y: auto; visibility: hidden;
        transition: transform .25s ease, visibility .25s;
    }
    .nav-links.active { visibility: visible; }
    .nav-item { width: 100%; max-width: 400px; }
    .lang-menu { position: static; display: none; transform: none; margin-top: 8px; }
    .lang-dropdown.open .lang-menu { display: block; transform: none; }
    .lang-trigger { margin: 0 auto; }
    .hero { padding-top: 64px; min-height: 100svh; }
    .hero-label { letter-spacing: .03em; font-size: 12px; }
    .hero-intro-card { flex: auto; }
    .particle-canvas { opacity: .45; }
    .section { padding: 64px 0; scroll-margin-top: 80px; }
    .section-header { margin-bottom: 32px; }
    .section-title { font-size: 30px; }
    .research-card-bg { min-height: auto; }
    .research-card-content { padding: 24px; }
    .research-icon { margin-bottom: 16px; }
    .publication-item { position: relative; padding: 20px; gap: 14px; }
    .pub-year { min-width: 52px; height: 32px; }
    .pub-link { position: absolute; top: 14px; right: 14px; }
    .pub-title { font-size: 16px; }
    .pub-meta { gap: 6px 12px; }
    .team-member { padding: 24px; gap: 16px; }
    .contact-grid { gap: 28px; }
    .publications { padding-top: 100px; }
}
@media (max-width: 360px) {
    .nav-container { padding: 0 12px; }
    .logo-img { width: 120px; }
    .logo-text { font-size: 14px; }
    .position-tag { padding: 7px 10px; font-size: 13px; }
}
@media (hover: none) {
    .research-card:hover, .team-member:hover, .publication-item:hover { transform: none; }
}

/* 原版风格优化：沿用配色、首屏粒子背景和卡片语言。 */
html{scroll-padding-top:104px}.navbar.hidden{transform:none}.nav-container{gap:16px;padding-inline:32px}.nav-logo{flex-shrink:0}.logo-img{width:245px;height:auto;padding:0}.logo-text{white-space:nowrap;font-size:18px}.nav-links{gap:2px}.nav-item{padding:10px 12px;white-space:nowrap;font-size:14px}.hero-profile{display:flex;align-items:center;gap:20px;margin-bottom:25px}.hero-profile img{width:84px;height:98px;object-fit:cover;object-position:top;border-radius:12px;box-shadow:var(--shadow)}.hero-profile h2{font-size:24px;margin-bottom:7px}.hero-profile p{color:var(--primary);font-size:12px}.hero-intro-title{font-size:17px}.hero-actions{display:flex;align-items:center;gap:24px;flex-wrap:wrap;margin-top:30px}.hero-actions .email-btn{font-size:14px;padding:13px 23px}.hero-secondary{font-size:14px;color:var(--primary);font-weight:600}.hero-positions a:hover{background:rgba(115,32,124,.14)}.research-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.research-card-bg{min-height:300px}.research-icon{font-size:38px;color:var(--primary)}.about-photo{margin:0}.about-photo-img{aspect-ratio:1184/1310}.about-title,.about-subtitle{text-align:left}.members-notice{margin-top:40px;border:1px solid var(--border);border-radius:var(--radius-md);background:white;box-shadow:var(--shadow);padding:25px 30px;color:var(--text-secondary);font-size:15px;line-height:1.9}.members-notice a{color:var(--primary);font-weight:600;display:inline-block;margin-left:10px}.news-content .hero-intro-link{margin-top:15px}.news-date{min-width:110px}.news-day{font-size:29px}.recruitment{background:var(--bg-secondary)}.recruitment-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.recruitment-card{border:1px solid var(--border);border-radius:var(--radius-md);padding:32px;background:var(--bg-card);box-shadow:var(--shadow);display:flex;flex-direction:column}.recruitment-card .position-tag{align-self:flex-start;font-size:11px;padding:5px 11px}.recruitment-card h3{font-size:22px;margin:22px 0 14px;color:var(--primary)}.recruitment-card p{font-size:14px;line-height:1.9;color:var(--text-secondary)}.recruitment-card .hero-intro-link{margin-top:auto;padding-top:25px}.application-note{padding:28px 32px;border:1px solid var(--border);border-radius:var(--radius-md);margin-top:28px;background:#fff}.application-note h3{font-size:18px;color:var(--primary);margin-bottom:10px}.application-note p{font-size:14px;color:var(--text-secondary);line-height:1.9}.contact-item a{color:var(--primary)}.pub-title a:hover{color:var(--primary)}.search-input-wrapper{position:relative;display:flex;align-items:center;gap:12px;margin-bottom:22px}.search-input-wrapper input{display:block;width:100%;min-width:0;border:1px solid var(--border);border-radius:var(--radius-sm);padding:15px 50px 15px 20px;font:inherit;color:var(--text-primary);background:var(--bg)}.search-input-wrapper input::-webkit-search-cancel-button{display:none}#searchClear{position:absolute;right:9px;width:36px;height:36px;font-size:24px;visibility:hidden}#searchClear.visible{visibility:visible}.search-filters{display:flex;gap:8px;flex-wrap:wrap}.search-stats{margin-top:18px}.search-box{background:#fff}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.lang-option.active{color:#fff;background:rgba(255,255,255,.13)}.lang-trigger:focus-visible,.nav-item:focus-visible,.mobile-toggle:focus-visible{outline-color:#fff}
@media(min-width:1181px) and (max-width:1360px){.nav-container{padding-inline:20px}.logo-img{width:200px}.logo-text{font-size:16px}.nav-logo{gap:10px}.nav-item{font-size:13px;padding-inline:9px}.nav-links{gap:0}}
@media(max-width:1180px){.mobile-toggle{display:flex}.navbar{height:72px}.nav-links{position:fixed;top:72px;left:0;right:0;bottom:auto;height:calc(100dvh - 72px);background:var(--primary);display:flex;flex-direction:column;align-items:center;justify-content:flex-start;padding:24px 20px 40px;overflow-y:auto;visibility:hidden;transform:translateX(100%);transition:transform .25s,visibility .25s;overscroll-behavior:contain}.nav-links.active{visibility:visible;transform:translateX(0)}.nav-item{font-size:17px;width:100%;max-width:500px;text-align:center;padding:15px 24px}.lang-dropdown{margin:16px 0 0}.lang-trigger{margin-inline:auto}.lang-menu{position:static;display:none;transform:none;margin-top:8px}.lang-dropdown.open .lang-menu{display:block;transform:none}.hero{padding-top:72px}.logo-img{width:245px;height:auto}.nav-container{padding-inline:24px}.logo-text{font-size:18px}.publications{padding-top:112px}html{scroll-padding-top:88px}}
@media(max-width:768px){.navbar{height:64px}.nav-links{top:64px;height:calc(100dvh - 64px)}.hero{padding-top:64px}.nav-container{padding-inline:16px}.logo-img{width:148px;height:auto}.logo-text{font-size:16px}.nav-logo{gap:10px}.hero-profile{gap:17px}.hero-profile h2{font-size:22px}.hero-profile img{width:76px;height:88px}.hero-split{padding-block:44px}.hero-actions{justify-content:center;gap:20px}.hero-actions .email-btn{padding:12px 20px}.research-grid{grid-template-columns:1fr}.recruitment-grid{grid-template-columns:1fr}.recruitment-card{padding:26px}.about-title,.about-subtitle{text-align:center}.about-content{gap:28px}.about-content p{font-size:15px}.members-notice{padding:20px;font-size:14px}.members-notice a{margin:8px 0 0;display:block}.news-date{min-width:0}.application-note{padding:24px}.hero-label{font-size:12px}.news-day{font-size:25px}.news-item{padding:24px}.section{scroll-margin-top:80px}.hero-intro-card{width:100%}.publication-item:hover{transform:none}.pub-meta{font-size:12px}.pub-tags{gap:6px}.pub-tag{font-size:11px;padding:4px 9px}.publication-item .pub-title{padding-right:10px}.publications{padding-top:104px}}
@media(max-width:360px){.nav-container{padding-inline:12px}.logo-img{width:125px}.logo-text{font-size:14px}.hero-profile{gap:12px}.hero-profile h2{font-size:20px}.hero-profile p{font-size:11px}.hero-positions{gap:7px}.position-tag{padding:7px 10px}.hero-actions{gap:15px}.hero-actions .email-btn{font-size:13px;padding-inline:17px}}


/* 研究成果：每篇论文占一行。 */
.publication-list {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    align-items: stretch;
}
.publication-item {
    position: relative;
    min-width: 0;
    padding: 26px;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 20px;
}
.publication-item:hover { transform: translateY(-5px); }
.publication-item .pub-year { align-self: flex-start; min-width: 64px; height: 38px; }
.publication-item .pub-content { display: flex; flex-direction: column; }
.publication-item .pub-title { padding-right: 0; font-size: 17px; line-height: 1.65; }
.publication-item .pub-meta { display: flex; flex-direction: column; gap: 7px; font-size: 12px; line-height: 1.7; }
.publication-item .pub-tags { margin-top: auto; padding-top: 8px; }
.publication-item .pub-link { position: absolute; top: 23px; right: 20px; padding-top: 0; }
.publication-list .no-results { grid-column: 1 / -1; }
.supervised-students { margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--border); }
.students-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.students-heading h3 { font-size: 24px; color: var(--text-primary); }
.students-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.student-card { display: flex; align-items: center; gap: 22px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 28px; box-shadow: var(--shadow); }
.student-avatar { display: flex; align-items: center; justify-content: center; flex-shrink: 0; width: 74px; height: 74px; border-radius: 50%; color: var(--primary); background: linear-gradient(135deg, #f0e5f5, #eeeafa); border: 1px solid rgba(115,32,124,.12); font-size: 27px; font-weight: 600; }
.student-card h4 { font-size: 21px; margin-bottom: 7px; }
.student-card p { font-size: 14px; color: var(--text-secondary); }
@media (max-width: 640px) {
    .publication-list, .students-grid { grid-template-columns: 1fr; gap: 18px; }
    .publication-item { padding: 22px; }
    .publication-item .pub-link { top: 18px; right: 16px; }
    .publication-item .pub-title { font-size: 16px; }
    .students-heading { align-items: flex-start; flex-direction: column; gap: 10px; }
    .students-heading h3 { font-size: 22px; }
    .student-card { padding: 24px; }
    .supervised-students { margin-top: 32px; padding-top: 26px; }
}
@media (hover: none) { .publication-item:hover { transform: none; } }


/* 首页精选与全部成果共用横向论文列表。 */
:is(.publications-preview, body[data-page="publications"] .publications) .publication-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
}
:is(.publications-preview, body[data-page="publications"] .publications) .publication-item {
    padding: 28px;
    gap: 0;
}
:is(.publications-preview, body[data-page="publications"] .publications) .pub-year { display: none; }
:is(.publications-preview, body[data-page="publications"] .publications) .pub-title { padding-right: 44px; font-size: 18px; }
:is(.publications-preview, body[data-page="publications"] .publications) .pub-meta { flex-direction: row; flex-wrap: wrap; gap: 8px 18px; font-size: 14px; }
:is(.publications-preview, body[data-page="publications"] .publications) .pub-tags { margin-top: 0; padding-top: 0; }
:is(.publications-preview, body[data-page="publications"] .publications) .pub-link { top: 24px; right: 22px; }
@media (max-width: 640px) {
    :is(.publications-preview, body[data-page="publications"] .publications) .publication-item { padding: 22px; }
    :is(.publications-preview, body[data-page="publications"] .publications) .pub-title { padding-right: 30px; font-size: 16px; }
    :is(.publications-preview, body[data-page="publications"] .publications) .pub-meta { font-size: 12px; gap: 7px 12px; }
    :is(.publications-preview, body[data-page="publications"] .publications) .pub-link { top: 18px; right: 14px; }
}

/* 学生目录：参考左侧分类、当前位置与分页，融入原有紫色卡片样式。 */
.member-directory { scroll-margin-top: 112px; }
.directory-layout { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 30px; align-items: start; }
.directory-sidebar { overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius-md); background: white; box-shadow: var(--shadow); }
.directory-sidebar > h4 { padding: 19px 22px; color: white; background: linear-gradient(135deg, #73207c, #663bd5); font-size: 17px; font-weight: 600; }
.directory-categories { padding: 10px; }
.directory-category { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 14px 12px; text-align: left; border-radius: 9px; font-size: 14px; font-weight: 500; transition: background .2s, color .2s; }
.directory-category + .directory-category { margin-top: 3px; }
.category-label { display: flex; align-items: center; gap: 10px; min-width: 0; }
.category-arrow { color: #aa88b8; font-size: 22px; line-height: 1; }
.category-count { min-width: 23px; height: 23px; border-radius: 7px; display: inline-flex; align-items: center; justify-content: center; background: #f4f1f6; font-size: 11px; color: var(--text-tertiary); flex-shrink: 0; }
.directory-category:hover { color: var(--primary); background: #f7f2fa; }
.directory-category.active { color: var(--primary); background: #f0e7f5; font-weight: 600; }
.directory-category.active .category-arrow { color: var(--primary); }
.directory-category.active .category-count { color: #fff; background: var(--primary); }
.directory-main { min-width: 0; }
.directory-breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 11px; padding: 16px 20px; border: 1px solid #e2d5e9; border-radius: 12px; background: #fcfaff; font-size: 12px; color: var(--text-tertiary); }
.directory-breadcrumb > span:first-child { margin-right: 6px; }
.directory-breadcrumb a, #directoryCrumb { color: var(--primary); }
.directory-breadcrumb a:hover { text-decoration: underline; }
.directory-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 28px 0 22px; }
.directory-toolbar h4 { font-size: 20px; color: var(--text-primary); }
.directory-toolbar p { font-size: 12px; color: var(--text-tertiary); white-space: nowrap; }
.member-directory .students-grid { gap: 18px; }
.member-directory .student-card { padding: 25px 22px; gap: 18px; }
.member-directory .student-avatar { width: 64px; height: 64px; font-size: 24px; }
.member-directory .student-card h5 { font-size: 21px; line-height: 1.5; margin: 0 0 6px; }
.member-directory .student-card p { font-size: 12px; }
.directory-pagination { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; margin-top: 28px; padding-top: 22px; border-top: 1px solid var(--border); }
.directory-pagination[hidden] { display: none; }
.directory-pagination > p { font-size: 12px; color: var(--text-tertiary); }
.directory-page-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.directory-page-controls button, .directory-page-controls select { border: 1px solid #e2d9e7; border-radius: 7px; min-height: 35px; padding: 6px 11px; background: #fff; color: var(--primary); font: inherit; font-size: 12px; }
.directory-page-controls button:not(:disabled):hover { background: #efe5f5; }
.directory-page-controls button:disabled { color: #98919c; background: #f7f5f8; cursor: default; }
.directory-page-controls select { min-width: 46px; color: var(--primary); border-color: #cbb4d8; }
.directory-page-controls select:disabled { opacity: 1; background: #f0e7f5; cursor: default; }
.directory-empty { grid-column: 1 / -1; min-height: 196px; padding: 36px 24px; border: 1px dashed #d9cbdf; border-radius: var(--radius-md); text-align: center; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; background: #fcfaff; color: var(--text-tertiary); font-size: 14px; }
.directory-empty-symbol { width: 46px; height: 46px; line-height: 46px; background: #f0e7f5; border-radius: 50%; color: var(--primary); font-size: 21px; }
.directory-noscript { margin-top: 18px; font-size: 12px; color: var(--text-tertiary); }
@media (max-width: 1024px) {
    .directory-layout { grid-template-columns: 200px minmax(0, 1fr); gap: 24px; }
    .member-directory .students-grid { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
    .directory-layout { grid-template-columns: 1fr; gap: 22px; }
    .directory-sidebar > h4 { padding: 15px 18px; font-size: 16px; }
    .directory-categories { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; padding: 10px; }
    .directory-category { font-size: 12px; padding: 10px; gap: 6px; }
    .directory-category + .directory-category { margin-top: 0; }
    .category-label { gap: 5px; }
    .category-arrow { font-size: 18px; }
    .category-count { min-width: 20px; height: 20px; font-size: 10px; }
    .directory-breadcrumb { padding: 13px 15px; font-size: 11px; gap: 8px; }
    .directory-breadcrumb > span:first-child { margin-right: 0; }
    .directory-toolbar { margin: 22px 0 18px; }
    .directory-toolbar h4 { font-size: 19px; }
    .member-directory .student-card { padding: 22px; }
    .directory-pagination { flex-direction: column; align-items: flex-start; gap: 12px; }
    .directory-page-controls button { padding-inline: 10px; }
    .member-directory { scroll-margin-top: 84px; }
}

/* 独立成员页与首页课题组动态。 */
.members-portal { margin-top: 42px; padding: 28px 32px; border: 1px solid var(--border); border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow); display: flex; align-items: center; justify-content: space-between; gap: 25px; }
.members-portal h3 { font-size: 21px; margin-bottom: 8px; color: var(--primary); }
.members-portal p { color: var(--text-secondary); font-size: 14px; line-height: 1.8; }
.members-portal .email-btn { font-size: 14px; padding: 13px 23px; white-space: nowrap; }
.members-banner { margin-top: 88px; background: linear-gradient(135deg, #c5cbd6, #e8dfef); border-bottom: 1px solid var(--border); }
.members-banner-inner { min-height: 280px; display: flex; align-items: center; justify-content: space-between; gap: 35px; }
.members-banner h1 { font-size: 42px; line-height: 1.4; color: #25162c; margin: 13px 0; }
.members-banner p { color: #635b6b; font-size: 14px; }
.members-banner .members-banner-eyebrow { color: var(--primary); font-size: 11px; letter-spacing: .13em; font-weight: 600; }
.members-banner img { width: 300px; flex-shrink: 0; }
.members-page { padding-top: 48px; padding-bottom: 42px; min-height: 530px; background: var(--bg-secondary); }
.standalone-directory { margin: 0; padding: 0; border: 0; }
.standalone-directory .directory-main { padding: 0; }
.standalone-directory .student-card { align-items: flex-start; }
.student-avatar img { width: 100%; height: 100%; object-fit: cover; object-position: center 20%; border-radius: inherit; }
.directory-profile-link { display: inline-block; font-size: 11px; color: var(--primary); margin-top: 10px; }
.directory-profile-link:hover { text-decoration: underline; }
.members-page-footer { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 30px; padding-block: 28px; }
.news-filters { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; margin: -20px 0 32px; }
.news-filter { border: 1px solid #d9cbe2; border-radius: 999px; background: #fff; font-size: 13px; color: var(--primary); padding: 9px 20px; transition: background .2s, color .2s; }
.news-filter:hover { background: #f0e7f5; }
.news-filter.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.news-item[hidden], .news-empty[hidden] { display: none; }
.news-type { display: inline-block; color: var(--primary); font-size: 11px; border-radius: 999px; padding: 3px 10px; background: #f0e7f5; margin-bottom: 10px; }
@media (max-width:1180px) { .members-banner { margin-top: 72px; } }
@media (max-width:768px) {
    .members-banner { margin-top: 64px; }
    .members-banner-inner { min-height: 230px; gap: 12px; padding-block: 30px; }
    .members-banner h1 { font-size: 32px; }
    .members-banner p { font-size: 12px; }
    .members-banner img { width: 180px; }
    .members-portal { flex-direction: column; align-items: flex-start; padding: 24px; }
    .members-page { padding-top: 30px; padding-bottom: 30px; }
    .members-page-footer { justify-content: flex-start; gap: 20px; }
    .news-filters { margin-top: -4px; gap: 8px; }
    .news-filter { padding: 8px 15px; font-size: 12px; }
}
@media (max-width:480px) {
    .members-banner-inner { min-height: 205px; }
    .members-banner img { width: 100px; }
    .members-banner h1 { font-size: 29px; }
    .members-banner .members-banner-eyebrow { font-size: 9px; }
    .members-banner p { max-width: 240px; }
    .members-page-footer .hero-intro-link { font-size: 12px; }
}

/* 成员页比例调整：紧凑页头、完整导师卡片、减少冗余框线与空白。 */
.members-banner { background: #f4f0f8; border-bottom-color: #e8e0ed; }
.members-banner-inner { min-height: 166px; padding-top: 28px; padding-bottom: 28px; }
.members-banner-inner > div { min-width: 0; }
.members-banner h1 { font-size: 36px; margin: 0 0 10px; line-height: 1.4; }
.members-banner p { color: var(--text-tertiary); line-height: 1.8; }
.members-home-link { display: inline-flex; gap: 10px; align-items: center; color: var(--primary); font-size: 13px; flex-shrink: 0; }
.members-home-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.members-page { padding-top: 38px; padding-bottom: 44px; min-height: 0; }
.standalone-directory .directory-layout { grid-template-columns: 205px minmax(0,1fr); gap: 32px; }
.standalone-directory .directory-sidebar { border-radius: 12px; box-shadow: 0 3px 16px rgba(45,25,55,.035); }
.standalone-directory .directory-sidebar > h4 { background: #f0e8f6; color: var(--primary); padding: 16px 20px; font-size: 15px; border-bottom: 1px solid #e8deee; }
.standalone-directory .directory-categories { padding: 8px; }
.standalone-directory .directory-category { padding: 10px 11px; min-height: 42px; font-size: 13px; line-height: 1.65; }
.standalone-directory .category-count { font-size: 10px; min-width: 20px; height: 20px; }
.standalone-directory .directory-breadcrumb { border: 0; background: none; border-radius: 0; padding: 0; min-height: 24px; gap: 8px; font-size: 11px; }
.standalone-directory .directory-breadcrumb > span:first-child { display: none; }
.standalone-directory .directory-toolbar { margin: 17px 0 22px; padding-bottom: 17px; border-bottom: 1px solid #e6dfeb; }
.standalone-directory .directory-toolbar h4 { font-size: 22px; min-width: 0; }
.standalone-directory .student-card { box-shadow: 0 4px 20px rgba(43,23,52,.035); border-color: #e8e2ec; border-radius: 12px; padding: 25px; align-items: center; }
.standalone-directory .directory-member-info { min-width: 0; overflow-wrap: anywhere; }
.standalone-directory .student-card h5 { font-size: 21px; }
.standalone-directory .faculty-card { grid-column: 1 / -1; display: grid; grid-template-columns: 150px minmax(0,1fr); gap: 30px; padding: 30px; align-items: center; }
.standalone-directory .faculty-card .student-avatar { width: 150px; height: 178px; border-radius: 9px; overflow: hidden; border: 0; background: #ddd7e1; }
.standalone-directory .faculty-card .student-avatar img { object-position: center top; }
.standalone-directory .faculty-card h5 { font-size: 27px; margin-bottom: 9px; }
.standalone-directory .faculty-card .directory-member-info > p:first-of-type { color: var(--primary); font-size: 12px; }
.standalone-directory .faculty-card .faculty-summary { font-size: 13px; color: var(--text-secondary); line-height: 1.9; margin: 17px 0 14px; max-width: 600px; }
.faculty-email { display: block; width: fit-content; font-size: 12px; color: var(--text-secondary); }
.faculty-email:hover { color: var(--primary); }
.standalone-directory .faculty-card .directory-profile-link { font-size: 12px; margin-top: 11px; }
.standalone-directory .directory-empty { min-height: 260px; background: #fff; border-style: solid; border-color: #e8e2ec; }
.members-page-footer { padding-top: 18px; padding-bottom: 24px; background: white; }
@media (max-width:1024px) {
    .standalone-directory .directory-layout { grid-template-columns: 190px minmax(0,1fr); gap: 24px; }
    .standalone-directory .faculty-card { grid-template-columns: 115px minmax(0,1fr); gap: 22px; padding: 24px; }
    .standalone-directory .faculty-card .student-avatar { width: 115px; height: 146px; }
}
@media (max-width:700px) {
    .members-banner-inner { min-height: 142px; gap: 18px; padding-block: 26px; }
    .members-banner h1 { font-size: 28px; }
    .members-banner p { font-size: 12px; max-width: 100%; }
    .members-home-link { font-size: 11px; gap: 6px; }
    .members-page { padding-top: 26px; padding-bottom: 26px; }
    .standalone-directory .directory-layout { grid-template-columns: minmax(0,1fr); gap: 24px; }
    .standalone-directory .directory-category { padding: 9px; font-size: 12px; }
    .standalone-directory .directory-categories { grid-template-columns: repeat(2,minmax(0,1fr)); }
    .standalone-directory .directory-toolbar { margin-top: 12px; }
    .standalone-directory .faculty-card { grid-template-columns: 88px minmax(0,1fr); gap: 18px; padding: 22px; align-items: start; }
    .standalone-directory .faculty-card .student-avatar { width: 88px; height: 111px; }
    .standalone-directory .faculty-card h5 { font-size: 23px; }
    .standalone-directory .faculty-card .faculty-summary { margin-top: 14px; font-size: 12px; }
    .standalone-directory .category-label > span:last-child { overflow-wrap: anywhere; }
    .standalone-directory .directory-toolbar h4 { font-size: 20px; }
}
@media (max-width:400px) {
    .members-banner-inner { flex-wrap: wrap; gap: 14px; }
    .members-home-link { font-size: 12px; }
    .standalone-directory .faculty-card { grid-template-columns: 1fr; gap: 18px; }
    .standalone-directory .faculty-card .student-avatar { width: 98px; height: 124px; }
}


/* 全站统一规范：内容对齐、页头、卡片、控件和响应式间距。 */
:root {
    --border: #e8e2ec;
    --shadow: 0 4px 20px rgba(43,23,52,.045);
    --shadow-lg: 0 10px 32px rgba(43,23,52,.10);
    --content-width: 1200px;
    --header-height: 88px;
}
.container { max-width: var(--content-width); margin-inline: auto; }
/* 导航两侧对称留白，大屏幕适当向内收。 */
.nav-container { width: 100%; max-width: none; margin-inline: 0; padding-inline: 24px; }
@media (min-width: 1360px) {
    .nav-container { padding-inline: clamp(40px, 3.5vw, 90px); }
}
html { scroll-padding-top: calc(var(--header-height) + 20px); }
.section { padding-block: 80px; scroll-margin-top: calc(var(--header-height) + 20px); }
.section-header { margin-bottom: 40px; }
.section-title { font-size: 36px; line-height: 1.4; }
.section-desc { font-size: 15px; line-height: 1.85; }
.publication-item, .research-card, .news-item, .recruitment-card, .contact-item,
.contact-cta, .members-portal, .search-box, .application-note,
.standalone-directory .student-card { border-color: var(--border); border-radius: 16px; box-shadow: var(--shadow); }
.publication-item:hover, .research-card:hover, .news-item:hover { box-shadow: var(--shadow-lg); }
.email-btn, .view-all-link { min-height: 46px; padding: 12px 24px; font-size: 14px; border-radius: 8px; }
.filter-btn, .news-filter { min-height: 40px; padding: 8px 17px; font-size: 13px; border-radius: 999px; }
.search-box { padding: 26px; margin-bottom: 30px; }
.search-filters { margin-bottom: 0; }
.page-banner { margin-top: var(--header-height); background: #f4f0f8; border-bottom: 1px solid #e8e0ed; }
.page-banner-inner { min-height: 154px; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding-top: 28px; padding-bottom: 28px; }
.page-banner h1 { font-family: var(--font-display); font-size: 36px; font-weight: 700; line-height: 1.4; color: var(--text-primary); margin: 0; }
.page-home-link { display: inline-flex; align-items: center; gap: 10px; font-size: 13px; color: var(--primary); flex-shrink: 0; }
.page-home-link:hover { text-decoration: underline; text-underline-offset: 4px; }
body[data-page="publications"] .publications, body[data-page="members"] .members-page { padding-top: 36px; padding-bottom: 48px; background: var(--bg-secondary); }
.archive-breadcrumb { display: flex; gap: 8px; align-items: center; min-height: 24px; margin-bottom: 24px; font-size: 11px; color: var(--text-tertiary); }
.archive-breadcrumb a { color: var(--primary); }
.archive-breadcrumb a:hover { text-decoration: underline; }
.standalone-directory .directory-sidebar { border-radius: 16px; border-color: var(--border); box-shadow: var(--shadow); }
.members-page-footer { max-width: none; padding-inline: max(24px,calc((100% - 1152px)/2)); }
.footer { padding-top: 48px; padding-bottom: 22px; }
.footer-content { gap: 40px; margin-bottom: 32px; }
.footer-column-title { font-size: 15px; margin-bottom: 16px; }
.footer-contact-info p, .footer-link-list li a { font-size: 13px; }
.footer-bottom { padding-top: 20px; }
@media (min-width:1181px) {
    .nav-container { gap: 20px; }
    .logo-img { width: 220px; }
    .logo-text { font-size: 17px; }
    .nav-logo { gap: 12px; }
    .nav-links { gap: 1px; }
    .nav-item { font-size: 13px; padding: 10px; }
}
@media (max-width:1180px) { :root { --header-height: 72px; } }
@media (max-width:768px) {
    :root { --header-height: 64px; }
    .section { padding-block: 56px; }
    .section-header { margin-bottom: 30px; }
    .section-title { font-size: 30px; }
    .section-desc { font-size: 14px; }
    .page-banner-inner { min-height: 132px; padding-block: 24px; gap: 16px; }
    .page-banner h1 { font-size: 30px; }
    .page-home-link { font-size: 12px; gap: 7px; }
    body[data-page="publications"] .publications, body[data-page="members"] .members-page { padding-top: 26px; padding-bottom: 36px; }
    .search-box { padding: 22px; margin-bottom: 24px; }
    .footer { padding-top: 36px; }
    .footer-content { gap: 26px; }
}
@media (max-width:480px) {
    .container, .nav-container { padding-inline: 16px; }
    .page-banner-inner { min-height: 126px; flex-wrap: wrap; gap: 12px; }
    .page-banner h1 { font-size: 28px; }
    .search-box { padding: 18px; }
    .filter-btn, .news-filter { padding-inline: 13px; font-size: 12px; }
    .members-page-footer { padding-inline: 16px; }
}

/* 首页岗位标签的语义说明。 */
.hero-join-label { font-size: 12px; font-weight: 500; color: var(--text-secondary); letter-spacing: .04em; margin-bottom: 12px; }

/* 首屏：以留白和层级建立重点。 */
.hero { background: #fafafa; overflow: visible; }
.hero::before { content: none; }
.hero-title { font-weight: 500; font-size: clamp(44px, 3.5vw, 56px); line-height: 1.15; letter-spacing: -.025em; margin-bottom: 28px; color: #202126; }
.hero-title-line { display: block; }
.hero-title-line + .hero-title-line { margin-top: .15em; }
.hero-title-keyword { color: #73207c; }
.hero-label { display: flex; align-items: center; gap: 12px; color: #63646b; font-size: 12px; font-weight: 500; letter-spacing: .04em; margin-bottom: 30px; }
.hero-label::before { content: ''; width: 24px; height: 2px; flex-shrink: 0; background: #73207c; }
.hero-subtitle { color: #62636a; font-size: 16px; line-height: 1.85; margin-bottom: 30px; text-wrap: pretty; }
.hero-positions { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 8px; width: 100%; max-width: 440px; }
.hero-positions .position-tag { min-width: 0; min-height: 46px; padding: 8px; justify-content: center; text-align: center; font-size: 13px; color: #505158; background: #fff; border: 1px solid #dedee3; border-radius: 6px; }
.hero-positions .position-tag:hover { background: #f0f0f2; border-color: #b7b8bf; }
.hero-actions { margin-top: 32px; gap: 24px; }
.hero-actions .email-btn { background: #23242a; color: #fff; font-weight: 500; border-radius: 6px; box-shadow: none; }
.hero-actions .email-btn:hover { background: #383940; }
.hero-actions .hero-secondary { display: inline-flex; align-items: center; justify-content: center; gap: 12px; padding: 13px 23px; border: 1px solid #d4d4dc; border-radius: 6px; background: transparent; color: #53545c; font-weight: 500; }
.hero-actions .hero-secondary:hover { color: #202126; border-color: #b7b8bf; background: #f0f0f2; }
.hero-intro-card { background: #fff; border: 1px solid #e8e8ec; box-shadow: 0 8px 32px rgba(20,20,28,.035); border-radius: 12px; padding: 32px; }
.hero .hero-profile p, .hero .hero-intro-link, .hero .hero-intro-link:hover { color: #62636a; }
.hero-profile h2, .hero-intro-title { font-weight: 500; }
.hero-intro-summary { color: #62636a; }
.hero-molecule { position: absolute; right: 24px; top: calc(50% + var(--header-height)/2); transform: translateY(-50%); width: min(810px, calc(100% - 48px)); height: calc(100% - var(--header-height) - 64px); max-height: 600px; object-fit: contain; opacity: .1; pointer-events: none; }
@media (max-width: 1024px) {
    .hero-label { justify-content: center; }
    .hero-positions { margin-inline: auto; }
    .hero-title { font-size: clamp(34px, 4.5vw, 48px); line-height: 1.15; }
}
@media (max-width: 640px) {
    .hero-title { font-size: clamp(28px, 6.8vw, 40px); line-height: 1.15; }
    .hero-label { font-size: 10px; gap: 8px; margin-bottom: 24px; }
    .hero-label::before { width: 16px; }
    .hero-subtitle { font-size: 14px; line-height: 1.8; }
    .hero-positions .position-tag { font-size: 11px; min-height: 48px; padding: 7px 5px; }
    .hero-intro-card { padding: 24px; }
    .hero-molecule { right: 16px; width: calc(100% - 32px); }
}

/* 统一视觉效果：卡片 12px、控件 6px，筛选与状态标签保留胶囊形状。 */
:root {
    --border: #e4e4e9;
    --border-light: #eeeeF2;
    --border-hover: #c9c9d2;
    --control-border: #d4d4dc;
    --bg-card-hover: #fafafa;
    --radius-sm: 6px;
    --radius-md: 12px;
    --shadow: 0 4px 20px rgba(20,20,28,.035);
    --shadow-lg: 0 8px 28px rgba(20,20,28,.065);
}
.hero-intro-card, .publication-item, .research-card, .news-item,
.recruitment-card, .contact-item, .contact-cta, .members-portal,
.search-box, .application-note, .standalone-directory .student-card,
.standalone-directory .directory-sidebar, .standalone-directory .directory-empty {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
}
/* 统一使用边框与轻阴影反馈，避免卡片横移或跳动。 */
.publication-item:hover, .research-card:hover, .news-item:hover,
.contact-item:hover, .team-member:hover, .alumni-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-lg);
    transform: none;
}
.research-card::before { content: none; }
.email-btn, .view-all-link, .card-link, .hero-actions .email-btn {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
    border-radius: var(--radius-sm);
    font-weight: 500;
    box-shadow: none;
}
.email-btn:hover, .view-all-link:hover, .research-card:hover .card-link,
.hero-actions .email-btn:hover {
    background: #f4eef6;
    color: var(--primary-dark);
    border-color: var(--primary-dark);
    box-shadow: none;
    transform: none;
}
.hero-actions .email-btn { border-radius: var(--radius-sm); }
.hero-actions .hero-secondary, .load-more {
    color: #53545c;
    background: transparent;
    border: 1px solid var(--control-border);
    border-radius: var(--radius-sm);
    font-weight: 500;
    box-shadow: none;
    transition: var(--transition);
}
.hero-actions .hero-secondary:hover, .load-more:hover {
    color: #202126;
    background: #f0f0f2;
    border-color: var(--border-hover);
    box-shadow: none;
    transform: none;
}
.hero-positions .position-tag { border-color: var(--control-border); border-radius: var(--radius-sm); }
.hero-positions .position-tag:hover { border-color: var(--border-hover); }
.filter-btn, .news-filter { border-color: var(--control-border); background: #fff; transition: var(--transition); }
.filter-btn:hover, .news-filter:hover { background: #f4eef6; border-color: #c5afcc; }
.filter-btn.active, .news-filter.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.search-input-wrapper input, .directory-page-controls button,
.directory-page-controls select { border-color: var(--control-border); border-radius: var(--radius-sm); transition: var(--transition); }
.search-input-wrapper input:focus-visible {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(115,32,124,.10);
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}
.directory-page-controls button:disabled, .directory-page-controls select:disabled {
    color: #777782;
    background: #f4f4f6;
    border-color: var(--border);
    box-shadow: none;
}
.directory-category, .category-count { border-radius: var(--radius-sm); }
.standalone-directory .directory-toolbar, .directory-pagination,
.standalone-directory .directory-sidebar > h4, .page-banner { border-color: var(--border); }
.pub-year, .news-date { border-radius: var(--radius-sm); }
.news-date { background: #f4eef6; }
@media (hover: none) {
    .publication-item:hover, .research-card:hover, .news-item:hover,
    .contact-item:hover, .team-member:hover, .alumni-card:hover {
        background: var(--bg-card); border-color: var(--border); box-shadow: var(--shadow);
    }
}

/* 成员页面包屑：链接和当前分类按钮保持一致的文字导航样式。 */
.directory-breadcrumb #directoryCrumb { font: inherit; color: var(--primary); padding: 0; background: none; border: 0; }
.directory-breadcrumb a:hover, .directory-breadcrumb #directoryCrumb:hover { text-decoration: underline; text-underline-offset: 4px; }

/* 成员页：紧凑标题区、完整成员分类、轻量选中态。 */
body[data-page="members"] .page-banner-inner {
    min-height: 78px; padding-block: 16px; justify-content: flex-start;
}
body[data-page="members"] .page-banner h1 { font-size: 28px; text-align: left; }
.standalone-directory .directory-sidebar > h4 {
    padding: 14px 18px 6px; background: none; border: 0;
    color: var(--text-tertiary); font-size: 12px; font-weight: 500;
}
.standalone-directory .directory-category.active { background: #f4eef6; color: var(--primary); font-weight: 500; }
.standalone-directory .directory-category .category-count,
.standalone-directory .directory-category.active .category-count { background: #f4f4f6; color: var(--text-tertiary); }
.standalone-directory .directory-toolbar { margin: 12px 0 20px; padding: 0; border: 0; justify-content: flex-end; }
.standalone-directory .directory-empty {
    height: 160px; min-height: 0; padding: 20px; gap: 12px; box-shadow: none;
}
.directory-empty-action {
    padding: 8px 16px; border: 1px solid var(--primary); border-radius: var(--radius-sm);
    color: var(--primary); background: transparent; font-size: 13px; transition: var(--transition);
}
.directory-empty-action:hover { background: #f4eef6; border-color: var(--primary-dark); }
@media (max-width: 768px) {
    body[data-page="members"] .page-banner-inner { min-height: 66px; padding-block: 14px; }
    body[data-page="members"] .page-banner h1 { font-size: 24px; }
}

/* 研究方向卡片：四张卡片统一浅灰外框，交互反馈保留在阴影与按钮上。 */
.research-card.research-card-bg { background: #fff; }
.research-card .research-card-overlay { display: none; }
.research-card:hover, .research-card:focus-visible, .research-card:active {
    background: #fff; border-color: var(--border); transform: none;
}

/* 导航采用柔和蓝色，保留白色文字的清晰对比。 */
:root { --nav-background: #2f41b0; }
.navbar, .navbar.scrolled { background: var(--nav-background); }
@media (max-width: 1180px) { .nav-links { background: var(--nav-background); } }

/* 首屏两个入口统一为紫色描边按钮。 */
.hero-actions .email-btn, .hero-actions .hero-secondary {
    color: var(--primary); background: transparent;
    border: 1px solid var(--primary); border-radius: var(--radius-sm);
    padding: 13px 23px; gap: 12px; font-size: 14px; font-weight: 500;
    min-height: 48px; box-shadow: none; transition: var(--transition);
}
.hero-actions .email-btn:hover, .hero-actions .hero-secondary:hover {
    color: var(--primary-dark); background: #f4eef6;
    border-color: var(--primary-dark); box-shadow: none; transform: none;
}

/* 独立动态页沿用成员页的标题、侧栏、卡片及分页样式。 */
body[data-page="news"] .page-banner-inner { min-height: 78px; padding-block: 16px; justify-content: flex-start; }
body[data-page="news"] .page-banner h1 { font-size: 28px; text-align: left; }
.news-page { padding-block: 36px 48px; background: var(--bg-secondary); }
.news-directory .news-filters { justify-content: flex-start; margin: 0 0 24px; gap: 8px; }
.news-archive-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin: 20px 0; }
.news-archive-toolbar h2 { font-size: 22px; font-weight: 500; color: var(--text-primary); scroll-margin-top: calc(var(--header-height) + 20px); }
.news-archive-toolbar p { font-size: 12px; color: var(--text-tertiary); white-space: nowrap; }
.news-year-heading { font-size: 16px; font-weight: 500; color: var(--text-secondary); margin: 4px 0 -4px; }
.news-year-heading:not(:first-child) { margin-top: 16px; }
.news-directory .news-content { min-width: 0; overflow-wrap: anywhere; }
.news-directory .news-date { flex-shrink: 0; }
#newsYearCrumb { font: inherit; color: var(--primary); background: none; border: 0; padding: 0; }
#newsYearCrumb:hover { text-decoration: underline; text-underline-offset: 4px; }
.news-directory .news-archive-empty[hidden] { display: none; }
@media (max-width: 768px) {
    body[data-page="news"] .page-banner-inner { min-height: 66px; padding-block: 14px; }
    body[data-page="news"] .page-banner h1 { font-size: 24px; }
    .news-page { padding-block: 26px 36px; }
    .news-archive-toolbar h2 { font-size: 20px; }
    .news-directory .news-date { padding: 12px; }
}