/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1a9f8c;
    --primary-dark: #158a7a;
    --primary-light: #e8f6f4;
    --text-dark: #333;
    --text-light: #666;
    --white: #fff;
    --bg-light: #f8f9fa;
    --border-color: #e0e0e0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.15);
    --radius: 8px;
    --radius-lg: 12px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

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

ul {
    list-style: none;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    z-index: 1000;
    transition: box-shadow 0.3s ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1200px;
    height: 100%;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: var(--primary-color);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon svg {
    width: 18px;
    height: 18px;
    color: var(--white);
}

.logo-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-menu a {
    font-size: 14px;
    color: var(--text-light);
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
    border-radius: 1px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn-help {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    background: var(--white);
    color: var(--text-light);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn-join {
    padding: 8px 20px;
    background: var(--primary-color);
    color: var(--white);
    font-size: 14px;
    font-weight: 500;
    border-radius: 20px;
    transition: background 0.3s ease;
}

.btn-join:hover {
    background: var(--primary-dark);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    transition: all 0.3s ease;
}

/* Hero 区域 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 20px 60px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('images/background.jpg') center center / cover no-repeat;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(26, 159, 140, 0.85) 0%, rgba(13, 122, 106, 0.85) 50%, rgba(9, 92, 79, 0.85) 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    margin-bottom: 24px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-tag .tag-icon {
    font-size: 14px;
}

.hero-tag span:last-child {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.95);
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: 24px;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 20px;
    font-weight: 400;
}

.hero-desc {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto 32px;
}

/* Hero 快速入口按钮 */
.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.hero-btn svg {
    width: 18px;
    height: 18px;
}

.hero-btn.primary {
    background: var(--white);
    color: var(--primary-color);
}

.hero-btn.primary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.hero-btn.secondary {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-btn.secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

/* 快速入口按钮栏 */
.quick-actions-bar {
    background: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 20px;
    position: sticky;
    top: 64px;
    z-index: 100;
    box-shadow: var(--shadow);
}

.quick-actions-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.quick-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: var(--bg-light);
    color: var(--text-dark);
    border: 1px solid var(--border-color);
    border-radius: 25px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.quick-action-btn svg {
    width: 18px;
    height: 18px;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

.quick-action-btn:hover {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(26, 159, 140, 0.3);
}

.quick-action-btn:hover svg {
    color: var(--white);
}

/* 核心数据 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
    max-width: 700px;
    margin: 48px auto 0;
}

.stat-card {
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-lg);
    padding: 24px 16px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-unit {
    font-size: 20px;
    font-weight: 600;
}

.stat-label {
    font-size: 13px;
    color: var(--text-light);
}

/* 通用区块样式 */
.section {
    padding: 80px 20px;
}

.section-alt {
    background: var(--bg-light);
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.section-desc {
    font-size: 16px;
    color: var(--text-light);
}

.section-footer {
    text-align: center;
    margin-top: 32px;
}

.more-link {
    display: inline-block;
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 500;
    transition: transform 0.3s ease;
}

.more-link:hover {
    transform: translateX(5px);
}

/* 项目进展 */
.progress-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.progress-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.progress-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.progress-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.progress-icon svg {
    width: 28px;
    height: 28px;
    color: var(--primary-color);
}

.progress-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.progress-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* 甘特图样式 - 卡片式折叠 */
.gantt-card {
    margin-top: 48px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.gantt-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 32px;
    cursor: pointer;
    transition: background 0.3s ease;
}

.gantt-card-header:hover {
    background: var(--bg-light);
}

.gantt-card-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.gantt-card-info svg {
    width: 40px;
    height: 40px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.gantt-card-info h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.gantt-card-info p {
    font-size: 13px;
    color: var(--text-light);
}

.gantt-card-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
}

.gantt-toggle-text {
    font-size: 13px;
    color: var(--primary-color);
    font-weight: 500;
}

.gantt-toggle-icon {
    width: 20px;
    height: 20px;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.gantt-card.expanded .gantt-toggle-icon {
    transform: rotate(180deg);
}

.gantt-card.expanded .gantt-toggle-text {
    display: none;
}

.gantt-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.gantt-card.expanded .gantt-content {
    max-height: 1000px;
}

.gantt-wrapper {
    position: relative;
    overflow-x: auto;
    padding: 0 32px 24px;
    margin-top: 8px;
}

.gantt-header {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 12px;
    margin-bottom: 8px;
}

.gantt-label-header {
    width: 180px;
    flex-shrink: 0;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-dark);
    padding-right: 16px;
}

.gantt-timeline {
    flex: 1;
    display: flex;
    justify-content: space-between;
    min-width: 600px;
}

.gantt-timeline span {
    font-size: 12px;
    color: var(--text-light);
}

.gantt-body {
    min-width: 780px;
    position: relative;
}

.gantt-row {
    display: flex;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: background 0.2s ease;
}

.gantt-row:hover {
    background: var(--bg-light);
    border-radius: 8px;
}

.gantt-row {
    cursor: pointer;
}

.gantt-row.future-row {
    opacity: 0.7;
}

.gantt-row.future-row:hover {
    opacity: 1;
}

.gantt-status.future {
    background: rgba(156, 39, 176, 0.15);
    color: #9c27b0;
}

.gantt-bar.future {
    background: linear-gradient(90deg, #9c27b0, #ba68c8);
}

.gantt-bar.future:hover {
    box-shadow: 0 2px 8px rgba(156, 39, 176, 0.4);
}

.gantt-label {
    width: 180px;
    flex-shrink: 0;
    font-size: 13px;
    color: var(--text-dark);
    padding-right: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.gantt-status {
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 10px;
    flex-shrink: 0;
}

.gantt-status.completed {
    background: rgba(26, 159, 140, 0.15);
    color: var(--primary-color);
}

.gantt-status.in-progress {
    background: rgba(255, 152, 0, 0.15);
    color: #ff9800;
}

.gantt-bar-wrapper {
    flex: 1;
    position: relative;
    height: 28px;
    background: rgba(0, 0, 0, 0.03);
    border-radius: 14px;
    margin: 0 8px;
}

.gantt-bar {
    position: absolute;
    top: 2px;
    height: 24px;
    background: linear-gradient(90deg, var(--primary-color), #2db5a3);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.gantt-bar:hover {
    transform: scaleY(1.1);
    box-shadow: 0 2px 8px rgba(26, 159, 140, 0.4);
}

.gantt-bar.in-progress {
    background: linear-gradient(90deg, #ff9800, #ffc107);
}

.gantt-bar.in-progress:hover {
    box-shadow: 0 2px 8px rgba(255, 152, 0, 0.4);
}

.gantt-today {
    position: absolute;
    top: 60px;
    bottom: 20px;
    width: 2px;
    z-index: 10;
}

.gantt-today-line {
    width: 2px;
    height: 100%;
    background: #e53935;
    border-radius: 1px;
}

.gantt-today-label {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    color: #e53935;
    font-weight: 600;
    white-space: nowrap;
}

.gantt-legend {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.gantt-legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-light);
}

.gantt-legend-bar {
    width: 24px;
    height: 12px;
    background: linear-gradient(90deg, var(--primary-color), #2db5a3);
    border-radius: 6px;
}

.gantt-legend-bar.in-progress {
    background: linear-gradient(90deg, #ff9800, #ffc107);
}

/* 响应式甘特图 */
@media (max-width: 768px) {
    .gantt-section {
        padding: 20px;
    }

    .gantt-label-header,
    .gantt-label {
        width: 140px;
        font-size: 12px;
    }

    .gantt-status {
        font-size: 9px;
        padding: 2px 4px;
    }

    .gantt-timeline {
        min-width: 400px;
    }

    .gantt-timeline span {
        font-size: 10px;
    }

    .gantt-body {
        min-width: 540px;
    }
}

/* 活动纪实 */
.activity-cards {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 20px;
}

.activity-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.activity-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.activity-card.large {
    grid-row: span 2;
}

.activity-image {
    height: 200px;
    overflow: hidden;
    position: relative;
}

.activity-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.activity-card.large .activity-image {
    height: 100%;
    min-height: 350px;
}

.activity-content {
    padding: 20px;
}

.activity-tag {
    display: inline-block;
    padding: 4px 10px;
    background: var(--primary-color);
    color: var(--white);
    font-size: 12px;
    border-radius: 12px;
    margin-bottom: 10px;
}

.activity-content h3 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.activity-card.large .activity-content h3 {
    font-size: 20px;
}

.activity-content p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 12px;
}

.activity-meta {
    display: flex;
    gap: 16px;
    font-size: 12px;
    color: var(--text-light);
}

/* 活动剪影 */
.gallery-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: 60px 0;
}

/* 活动剪影标题 */
.gallery-section .section-header {
    margin-bottom: 24px;
}

.gallery-section .section-tag {
    color: rgba(255, 255, 255, 0.8);
}

.gallery-section .section-title {
    color: var(--white);
}

.gallery-section .section-desc {
    color: rgba(255, 255, 255, 0.8);
}

.gallery-wrapper {
    overflow: hidden;
    padding: 20px 0;
    cursor: pointer;
}

.gallery-track {
    display: flex;
    gap: 16px;
    animation: scroll-left 84s linear infinite;
    width: max-content;
}

.gallery-track:hover {
    animation-play-state: paused;
}

.gallery-item {
    flex-shrink: 0;
    width: 280px;
    height: 180px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
    position: relative;
}

.gallery-item:hover {
    transform: scale(1.05);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@keyframes scroll-left {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.gallery-hint {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 13px;
}

.gallery-hint svg {
    width: 16px;
    height: 16px;
}

/* 活动剪影弹窗 */
.gallery-modal .modal-overlay {
    background: rgba(0, 0, 0, 0.85);
}

.gallery-modal-content {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-lg);
    max-width: 900px;
    width: 95%;
    max-height: 90vh;
    overflow: hidden;
    animation: modalIn 0.3s ease;
}

.gallery-modal-header {
    padding: 24px 24px 16px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.gallery-modal-header h2 {
    font-size: 22px;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.gallery-modal-header p {
    font-size: 14px;
    color: var(--text-light);
}

.gallery-modal-body {
    padding: 20px;
    overflow: hidden;
}

.gallery-modal-track {
    display: flex;
    gap: 16px;
    animation: modal-scroll 55s linear infinite;
}

.gallery-modal-track:hover {
    animation-play-state: paused;
}

@keyframes modal-scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.gallery-modal-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 16px;
    border-top: 1px solid var(--border-color);
}

.gallery-nav-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    background: var(--white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.gallery-nav-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
}

.gallery-nav-btn svg {
    width: 20px;
    height: 20px;
}

#galleryModalCounter {
    font-size: 14px;
    color: var(--text-light);
}

.gallery-modal-item {
    flex-shrink: 0;
    width: 300px;
    height: 200px;
    border-radius: var(--radius);
    overflow: hidden;
}

.gallery-modal-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 合作基地 */
.partner-group-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin: 32px 0 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.partner-group-title:first-of-type {
    margin-top: 0;
}

.partner-group-tag {
    font-size: 11px;
    padding: 4px 10px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 12px;
    font-weight: 500;
}

.partner-group-tag.secondary {
    background: #6c757d;
}

.partner-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.partner-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.partner-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.partner-cover {
    width: 100%;
    height: 100px;
    overflow: hidden;
}

.partner-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.partner-card:hover .partner-cover img {
    transform: scale(1.05);
}

.partner-card h3 {
    font-size: 14px;
    margin: 12px 12px 6px;
    color: var(--text-dark);
    font-weight: 600;
}

.partner-card p {
    font-size: 12px;
    color: var(--text-light);
    line-height: 1.4;
    padding: 0 12px 16px;
}

/* 团队成员 */
.team-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.team-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 32px 20px;
    text-align: center;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.team-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.team-avatar {
    width: 80px;
    height: 80px;
    margin: 0 auto 16px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--white);
    font-weight: 600;
}

.team-card h3 {
    font-size: 18px;
    margin-bottom: 4px;
    color: var(--text-dark);
}

.team-card p {
    font-size: 14px;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.team-college {
    font-size: 12px;
    color: var(--text-light);
}

/* 加入我们卡片 */
.join-team-wrapper {
    display: flex;
    justify-content: center;
}

.join-team-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 32px 40px;
    text-align: center;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 2px dashed var(--primary-color);
    max-width: 320px;
    width: 100%;
}

.join-team-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    background: var(--primary-light);
}

.join-team-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.join-team-icon svg {
    width: 28px;
    height: 28px;
    color: var(--white);
}

.join-team-card h3 {
    font-size: 20px;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.join-team-card p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 16px;
    line-height: 1.5;
}

.join-team-btn {
    display: inline-block;
    padding: 10px 28px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 25px;
    font-size: 14px;
    font-weight: 500;
    transition: background 0.3s ease;
}

.join-team-card:hover .join-team-btn {
    background: var(--primary-dark);
}

/* 青春笔记 */
.notes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.note-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.note-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.note-image {
    width: 100%;
    height: 140px;
    overflow: hidden;
}

.note-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.note-header {
    display: flex;
    justify-content: space-between;
    padding: 16px 16px 0;
    font-size: 12px;
    color: var(--text-light);
}

.note-card h3 {
    font-size: 16px;
    margin: 8px 16px;
    color: var(--text-dark);
}

.note-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
    margin: 0 16px 12px;
}

.note-tags {
    display: flex;
    gap: 8px;
    padding: 0 16px 16px;
}

.note-tags span {
    padding: 4px 10px;
    background: var(--primary-light);
    color: var(--primary-color);
    font-size: 12px;
    border-radius: 12px;
}

/* 投稿区域 */
.contribute-section {
    margin-top: 48px;
}

.contribute-box {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: var(--radius-lg);
    padding: 32px;
    color: var(--white);
}

.contribute-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contribute-icon svg {
    width: 28px;
    height: 28px;
}

.contribute-text h3 {
    font-size: 20px;
    margin-bottom: 4px;
}

.contribute-text p {
    font-size: 14px;
    opacity: 0.9;
}

.contribute-btn {
    padding: 12px 28px;
    background: var(--white);
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.contribute-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* 联系我们 */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon svg {
    width: 22px;
    height: 22px;
    color: var(--primary-color);
}

.contact-detail {
    display: flex;
    flex-direction: column;
}

.contact-label {
    font-size: 12px;
    color: var(--text-light);
}

.contact-value {
    font-size: 16px;
    color: var(--text-dark);
    font-weight: 500;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-form input,
.contact-form textarea {
    padding: 14px 18px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-social {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 32px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    text-decoration: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-social:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.contact-social-label {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
}

.contact-qrcode {
    width: 180px;
    height: 180px;
    object-fit: contain;
    border-radius: var(--radius);
}

.contact-social-hint {
    font-size: 14px;
    color: var(--primary-color);
    font-weight: 500;
}

.submit-btn {
    padding: 14px 28px;
    background: var(--primary-color);
    color: var(--white);
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.3s ease;
}

.submit-btn:hover {
    background: var(--primary-dark);
}

/* 页脚 */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 40px 20px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

.footer-logo img {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    object-fit: cover;
}

.footer-logo svg {
    width: 24px;
    height: 24px;
    color: var(--primary-color);
}

.footer-logo span {
    font-size: 18px;
    font-weight: 600;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 20px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--white);
}

.footer-copyright {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.5);
}

/* 友情链接 */
.friend-links {
    margin-bottom: 24px;
    padding: 20px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.friend-links-title {
    font-size: 14px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 16px;
    text-align: center;
}

.friend-links-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

.friend-link-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.85);
    transition: all 0.3s ease;
}

.friend-link-item:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    transform: translateY(-2px);
}

.friend-link-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.friend-link-item.douyin-link {
    background: rgba(26, 159, 140, 0.3);
    border: 1px solid rgba(26, 159, 140, 0.5);
}

.friend-link-item.douyin-link:hover {
    background: rgba(26, 159, 140, 0.5);
    border-color: var(--primary-color);
}

/* 弹窗 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
}

.modal-content {
    position: relative;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px;
    max-width: 400px;
    width: 90%;
    text-align: center;
    animation: modalIn 0.3s ease;
}

.modal-content.modal-form {
    max-width: 500px;
    text-align: left;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    background: var(--bg-light);
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    color: var(--text-light);
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: var(--border-color);
    color: var(--text-dark);
}

.modal-avatar {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--white);
    font-weight: 600;
}

.modal-content h2 {
    font-size: 24px;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.modal-role {
    font-size: 14px;
    color: var(--primary-color);
    margin-bottom: 24px;
}

.modal-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.modal-info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-light);
    border-radius: var(--radius);
}

.modal-info-item svg {
    width: 18px;
    height: 18px;
    color: var(--primary-color);
}

.modal-info-item span {
    font-size: 14px;
    color: var(--text-dark);
}

.modal-copy {
    width: 100%;
    padding: 12px 24px;
    background: var(--primary-color);
    color: var(--white);
    font-size: 14px;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.3s ease;
}

.modal-copy:hover {
    background: var(--primary-dark);
}

.modal-bio {
    font-size: 14px;
    color: var(--text-dark);
    line-height: 1.6;
    padding: 16px;
    background: var(--bg-light);
    border-radius: var(--radius);
    margin-bottom: 20px;
    text-align: left;
    min-height: 60px;
}

.modal-form label {
    display: block;
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 6px;
    margin-top: 12px;
    text-align: left;
}

.modal-form input,
.modal-form textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    box-sizing: border-box;
}

.modal-form input:focus,
.modal-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.team-actions .modal-copy {
    max-width: 200px;
    background: #6c757d;
}

.team-actions .modal-copy:hover {
    background: #5a6268;
}

.modal-content.modal-form h2 {
    text-align: center;
    margin-bottom: 8px;
}

.modal-desc {
    text-align: center;
    color: var(--text-light);
    font-size: 14px;
    margin-bottom: 24px;
}

.modal-content.modal-form form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.modal-content.modal-form input,
.modal-content.modal-form textarea {
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
}

.modal-content.modal-form input:focus,
.modal-content.modal-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
}

.form-tags label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--text-dark);
    cursor: pointer;
}

.form-tags input[type="checkbox"] {
    accent-color: var(--primary-color);
}

/* FAQ弹窗 */
.modal-faq {
    max-width: 640px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    text-align: left;
}

.modal-faq h2 {
    text-align: center;
    margin-bottom: 8px;
}

.modal-faq .modal-desc {
    text-align: center;
    margin-bottom: 24px;
}

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

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color 0.3s ease;
}

.faq-item:hover {
    border-color: var(--primary-color);
}

.faq-question {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--bg-light);
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
}

.faq-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    font-size: 12px;
    font-weight: 600;
    flex-shrink: 0;
}

.faq-answer {
    padding: 16px 20px 16px 60px;
    font-size: 14px;
    color: var(--text-medium);
    line-height: 1.7;
    background: var(--white);
}

/* FAQ留言 */
.faq-leave-msg {
    margin-top: 32px;
    padding: 24px;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    border: 1px dashed var(--border-color);
}

.faq-leave-msg h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.faq-leave-msg p {
    font-size: 13px;
    color: var(--text-medium);
    margin-bottom: 16px;
}

.faq-leave-msg .form-group {
    margin-bottom: 12px;
}

.faq-leave-msg .form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.faq-leave-msg .form-group input,
.faq-leave-msg .form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    background: var(--white);
    transition: border-color 0.3s ease;
    resize: vertical;
}

.faq-leave-msg .form-group input:focus,
.faq-leave-msg .form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.faq-leave-msg .submit-btn {
    width: 100%;
    margin-top: 4px;
}

/* Toast提示 */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-dark);
    color: var(--white);
    padding: 12px 24px;
    border-radius: var(--radius);
    font-size: 14px;
    z-index: 3000;
    opacity: 0;
    transition: all 0.3s ease;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .nav-menu {
        gap: 20px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .team-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .activity-cards {
        grid-template-columns: 1fr 1fr;
    }
    
    .activity-card.large {
        grid-column: span 2;
        grid-row: span 1;
    }
    
    .activity-card.large .activity-image {
        min-height: 250px;
    }
    
    .partner-cards {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .partner-group-title {
        font-size: 14px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 20px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .stat-card {
        padding: 20px 12px;
    }
    
    .stat-number {
        font-size: 28px;
    }
    
    .progress-cards,
    .partner-cards,
    .notes-grid {
        grid-template-columns: 1fr;
    }
    
    .partner-group-title {
        font-size: 14px;
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .activity-cards {
        grid-template-columns: 1fr;
    }
    
    .activity-card.large {
        grid-column: span 1;
    }
    
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .contribute-box {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .quick-actions-container {
        gap: 8px;
    }

    .quick-action-btn {
        padding: 8px 16px;
        font-size: 13px;
    }

    .quick-action-btn svg {
        width: 16px;
        height: 16px;
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: 16px;
    }

    .friend-links-grid {
        gap: 10px;
    }

    .friend-link-item {
        padding: 8px 14px;
        font-size: 12px;
    }

    .friend-link-item svg {
        width: 16px;
        height: 16px;
    }
}

@media (max-width: 480px) {
    .logo-text {
        font-size: 16px;
    }
    
    .btn-join {
        padding: 6px 14px;
        font-size: 13px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-desc {
        font-size: 14px;
    }
    
    .section {
        padding: 60px 20px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===== 新队徽接入：导航栏与页脚 Logo ===== */
.site-logo-img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    display: block;
    background: transparent;
}

.logo-icon.has-image {
    background: transparent;
    border-radius: 50%;
    overflow: visible;
}

.footer-brand-logo {
    width: 54px;
    height: 54px;
    border-radius: 50%;
    object-fit: cover;
    display: block;
    background: transparent;
}

@media (max-width: 768px) {
    .site-logo-img {
        width: 34px;
        height: 34px;
    }
}