/* ========== 全局变量 & 基础 ========== */
:root {
    --theme-color: #C1D8FF;
    --theme-color-dark: #9BB5E0;
    --theme-color-light: #E0EAFF;
    --text-color: #2D3A52;
    --text-light: #5A6B82;
    --white: #FFFFFF;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    width: 100%;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: #F0F4FF;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    width: 100%;
    max-width: 100vw;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    /*background-image: inherit;*/
    z-index: -1;
    opacity: 0.35;
}

/* ========== 工具栏 - 固定在顶部 ========== */
.toolbar {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    width: 100%;
    background: rgba(193, 216, 255, 0.75);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: 0 2px 20px rgba(155, 181, 224, 0.2);
    margin: 0;
    border-radius: 0;
}

.toolbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    gap: 8px;
}

.toolbar-left .logo-text {
    font-size: 1.1rem;
    font-weight: 700;
    color: #4A6FA5;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

/* ========== 桌面端导航 ========== */
.toolbar-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    justify-content: center;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    cursor: pointer;
    border-radius: 20px;
    font-weight: 500;
    transition: var(--transition);
    color: var(--text-color);
    font-size: 0.9rem;
    white-space: nowrap;
    background: transparent;
    border: none;
    text-decoration: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.nav-link:hover {
    background: rgba(155, 181, 224, 0.3);
}

.nav-link:active {
    background: rgba(155, 181, 224, 0.5);
    transform: scale(0.96);
}

/* ========== 移动端汉堡按钮 ========== */
.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(155, 181, 224, 0.2);
    border-radius: 10px;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 8px;
    order: 10;
    -webkit-tap-highlight-color: transparent;
    transition: var(--transition);
    position: relative;
    z-index: 1001;
}

.mobile-menu-btn:active {
    background: rgba(155, 181, 224, 0.4);
}

.mobile-menu-btn span {
    display: block;
    width: 22px;
    height: 2.5px;
    background: #4A6FA5;
    border-radius: 2px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: center;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(7.5px) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-7.5px) rotate(-45deg);
}

/* ========== 移动端遮罩层 ========== */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.35);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
}

.mobile-menu-overlay.show {
    display: block;
    opacity: 1;
    pointer-events: auto;
}

/* ========== 移动端弹出菜单面板 ========== */
.mobile-menu-panel {
    position: fixed;
    top: 56px;
    right: 12px;
    width: 200px;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
    z-index: 999;
    padding: 6px;
    border: 1px solid rgba(193, 216, 255, 0.5);
    opacity: 0;
    transform: translateY(-15px) scale(0.92);
    transition: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    pointer-events: none;
}

.mobile-menu-panel.show {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.mobile-menu-item {
    display: block;
    width: 100%;
    padding: 13px 18px;
    text-align: left;
    border: none;
    background: transparent;
    font-size: 0.95rem;
    color: var(--text-color);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.25s ease;
    font-weight: 500;
    text-decoration: none;
    -webkit-tap-highlight-color: transparent;
    opacity: 0;
    transform: translateX(20px);
}

.mobile-menu-panel.show .mobile-menu-item {
    opacity: 1;
    transform: translateX(0);
}

.mobile-menu-panel.show .mobile-menu-item:nth-child(1) { transition-delay: 0.05s; }
.mobile-menu-panel.show .mobile-menu-item:nth-child(2) { transition-delay: 0.1s; }
.mobile-menu-panel.show .mobile-menu-item:nth-child(3) { transition-delay: 0.15s; }
.mobile-menu-panel.show .mobile-menu-item:nth-child(4) { transition-delay: 0.2s; }
.mobile-menu-panel.show .mobile-menu-item:nth-child(5) { transition-delay: 0.25s; }
.mobile-menu-panel.show .mobile-menu-item:nth-child(6) { transition-delay: 0.3s; }

.mobile-menu-item:active {
    background: rgba(193, 216, 255, 0.45);
    color: #3A5A8C;
    transform: scale(0.96);
}

.toolbar-right {
    order: 9;
}

.toolbar-right .theme-badge {
    background: linear-gradient(135deg, #E0EAFF, #C1D8FF);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    color: #4A6FA5;
    white-space: nowrap;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

/* ========== 标题栏 ========== */
.title-bar {
    position: relative;
    background: rgba(193, 216, 255, 0.4);
    padding: 50px 20px 40px;
    margin: 56px 0 0 0;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    overflow: hidden;
    width: 100%;
}

.title-bar::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
    pointer-events: none;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.main-title {
    font-size: clamp(1.6rem, 5vw, 2.8rem);
    font-weight: 800;
    color: #3A5A8C;
    text-shadow: 0 2px 10px rgba(255, 255, 255, 0.6);
    letter-spacing: 2px;
    position: relative;
    z-index: 1;
    animation: titleGlow 3s ease-in-out infinite;
    word-break: break-word;
}

@keyframes titleGlow {
    0%, 100% { text-shadow: 0 2px 10px rgba(255, 255, 255, 0.6); }
    50% { text-shadow: 0 2px 25px rgba(255, 255, 255, 0.9), 0 0 40px rgba(193, 216, 255, 0.5); }
}

.sub-title {
    font-size: 0.95rem;
    color: #5A7AA8;
    margin-top: 6px;
    position: relative;
    z-index: 1;
}

.title-decoration {
    position: absolute;
    bottom: 10px;
    right: 15px;
    display: flex;
    align-items: center;
    gap: 6px;
    z-index: 1;
}

.deco-circle {
    width: 10px;
    height: 10px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.deco-circle.small {
    width: 6px;
    height: 6px;
}

.deco-star {
    font-size: 1.2rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.7; }
    50% { transform: scale(1.5); opacity: 1; }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

/* ========== 内容区域 ========== */
.content-wrapper {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

/* ========== 通用区块 ========== */
.section-block {
    margin: 24px 0;
    width: 100%;
}

.section-title {
    font-size: clamp(1.2rem, 3vw, 1.6rem);
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 16px;
    padding-left: 12px;
    border-left: 4px solid var(--theme-color-dark);
}

/* ========== 团队介绍 ========== */
.intro-card {
    background: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius);
    padding: 24px 20px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.intro-card p {
    margin-bottom: 10px;
    font-size: 0.95rem;
}

.intro-stats {
    display: flex;
    gap: 20px;
    margin-top: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-light);
}

.stat-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--theme-color-dark);
}

/* ========== 成员展示 ========== */
.members-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    width: 100%;
}

.member-card {
    background: rgba(255, 255, 255, 0.75);
    border-radius: var(--radius);
    padding: 24px 16px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.5);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateY(20px);
}

.member-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.member-avatar-img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 12px;
    display: block;
    border: 3px solid var(--theme-color-light);
    box-shadow: 0 4px 12px rgba(155, 181, 224, 0.3);
    background: var(--theme-color-light);
}

.member-avatar-fallback {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    background: var(--theme-color-light);
    border: 3px solid rgba(255, 255, 255, 0.6);
}

.member-name {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: #2D3A52;
    text-decoration: none;
    transition: color 0.3s ease;
}

.member-name:hover {
    color: #92B4F3;
}

.member-name:active {
    color: #4a6fb5;
    transition: none;
}

.member-role {
    font-size: 0.85rem;
    color: var(--theme-color-dark);
    font-weight: 600;
    margin-bottom: 6px;
}

.member-desc {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ========== 成员留言栏 - 自适应布局 ========== */
.messages-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    width: 100%;
}

.message-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-sm);
    padding: 16px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.5);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateX(-20px);
}

.message-item.visible {
    opacity: 1;
    transform: translateX(0);
}

.message-avatar-img {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    border: 2px solid var(--theme-color-light);
    background: var(--theme-color-light);
}

.message-avatar-fallback {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: var(--theme-color-light);
    border: 2px solid rgba(255, 255, 255, 0.6);
}

.message-content {
    flex: 1;
    min-width: 0;
}

.message-text {
    font-size: 0.9rem;
    font-style: italic;
    margin-bottom: 4px;
    word-break: break-word;
}

.message-author {
    font-size: 0.8rem;
    color: var(--theme-color-dark);
    font-weight: 600;
}

/* ========== 资源列表 - 网格自适应布局 ========== */
.resource-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    width: 100%;
}

.resource-card {
    background: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.5);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateY(20px);
    display: flex;
    flex-direction: column;
}

.resource-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.resource-name {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.resource-desc {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 12px;
    flex: 1;
}

.resource-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.resource-tag {
    background: var(--theme-color-light);
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    color: #4A6FA5;
}

.resource-action {
    text-align: center;
    margin-top: auto;
}

.download-btn {
    background: linear-gradient(135deg, #9BB5E0, #7E9DCB);
    color: white;
    border: none;
    padding: 10px 24px;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(155, 181, 224, 0.4);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    width: 100%;
    justify-content: center;
    -webkit-tap-highlight-color: transparent;
}

.download-btn:hover {
    background: linear-gradient(135deg, #7E9DCB, #6A8BB8);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(155, 181, 224, 0.6);
}

.download-btn:active {
    transform: scale(0.97);
}

/* ========== 分页器 ========== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.pagination-btn {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.7);
    color: var(--text-color);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.pagination-btn:hover {
    background: var(--theme-color-light);
}

.pagination-btn.active {
    background: var(--theme-color-dark);
    color: white;
    box-shadow: 0 4px 12px rgba(155, 181, 224, 0.4);
}

.pagination-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination-arrow {
    font-size: 1rem;
}

.page-info {
    font-size: 0.85rem;
    color: var(--text-light);
    margin: 0 8px;
}

/* ========== 底部信息 ========== */
.site-footer {
    background: rgba(255, 255, 255, 0.6);
    border-top: 1px solid rgba(193, 216, 255, 0.4);
    padding: 24px 16px;
    margin: 32px 0 0 0;
    text-align: center;
    width: 100%;
}

.footer-links {
    margin-bottom: 12px;
    display: flex;
    justify-content: center;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--transition);
}

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

.divider {
    color: #ccc;
}

.copyright {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 4px;
}

.icp-info {
    font-size: 0.75rem;
    color: #999;
    margin-bottom: 4px;
}

.theme-info {
    font-size: 0.75rem;
    color: #aaa;
}

/* ========== 响应式 ========== */
@media (min-width: 769px) {
    .toolbar-nav { display: flex !important; }
    .mobile-menu-btn { display: none !important; }
    .mobile-menu-overlay,
    .mobile-menu-panel { display: none !important; }
}

@media (max-width: 1024px) {
    .resource-list {
        grid-template-columns: repeat(2, 1fr);
    }
    .members-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .toolbar-nav { display: none !important; }
    .mobile-menu-btn { display: flex !important; }
    .toolbar-inner {
        padding: 8px 12px;
        gap: 6px;
    }
    .toolbar-left .logo-text { font-size: 1rem; }
    .toolbar-right .theme-badge {
        padding: 5px 10px;
        font-size: 0.72rem;
        margin-right: auto;
    }
    .messages-container {
        grid-template-columns: 1fr;
    }
    .resource-list {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    .members-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .member-avatar-img,
    .member-avatar-fallback {
        width: 64px;
        height: 64px;
    }
    .title-bar {
        padding: 40px 16px 30px;
        margin-top: 52px;
    }
    .section-block { margin: 20px 0; }
}

@media (max-width: 480px) {
    .resource-list {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    .members-grid {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }
    .messages-container {
        grid-template-columns: 1fr;
    }
    .member-card { padding: 16px 10px; }
    .member-avatar-img,
    .member-avatar-fallback {
        width: 56px;
        height: 56px;
        font-size: 2rem;
    }
    .member-name { font-size: 0.95rem; }
    .member-role { font-size: 0.75rem; }
    .member-desc { font-size: 0.72rem; }
    .content-wrapper { padding: 0 10px; }
    .pagination-btn {
        width: 32px;
        height: 32px;
        font-size: 0.8rem;
    }
}